Fix segmentation fault in TclOO that was noted in [16fe1b5807]. Update

coroutine and TclOO object creation routines to use TclCreateObjCommandInNs.

6 files changed, 15053 insertions, 40 deletions

diff --git a/generic/tclBasic.c b/generic/tclBasic.c
index 5b0112d..8a5afd0 100644
--- a/generic/tclBasic.c
+++ b/generic/tclBasic.c
@@ -2270,11 +2270,11 @@ Tcl_CreateObjCommand(
 	tail = cmdName;
     }
 
-    return tclCreateObjCommandInNs(interp, tail, (Tcl_Namespace *) nsPtr,
+    return TclCreateObjCommandInNs(interp, tail, (Tcl_Namespace *) nsPtr,
 	proc, clientData, deleteProc);
 }
 
-Tcl_Command tclCreateObjCommandInNs (
+Tcl_Command TclCreateObjCommandInNs (
     Tcl_Interp *interp,
     const char *cmdName,	/* Name of command, without any namespace components */
     Tcl_Namespace *namespace,   /* The namespace to create the command in */
@@ -8192,7 +8192,7 @@ Tcl_NRCreateCommand(
     return (Tcl_Command) cmdPtr;
 }
 
-Tcl_Command tclNRCreateCommandInNs (
+Tcl_Command TclNRCreateCommandInNs (
     Tcl_Interp *interp,
     const char *cmdName,
     Tcl_Namespace *nsPtr,
@@ -8201,7 +8201,7 @@ Tcl_Command tclNRCreateCommandInNs (
     ClientData clientData,
     Tcl_CmdDeleteProc *deleteProc) {
     Command *cmdPtr = (Command *)
-	tclCreateObjCommandInNs(interp,cmdName,nsPtr,proc,clientData,deleteProc);
+	TclCreateObjCommandInNs(interp,cmdName,nsPtr,proc,clientData,deleteProc);
 
     cmdPtr->nreProc = nreProc;
     return (Tcl_Command) cmdPtr;
@@ -8991,9 +8991,9 @@ TclNRCoroutineObjCmd(
 {
     Command *cmdPtr;
     CoroutineData *corPtr;
-    const char *fullName, *procName;
-    Namespace *nsPtr, *altNsPtr, *cxtNsPtr;
-    Tcl_DString ds;
+    const char *procName, *simpleName;
+    Namespace *nsPtr, *altNsPtr, *cxtNsPtr,
+	*inNsPtr = (Namespace *)TclGetCurrentNamespace(interp);
     Namespace *lookupNsPtr = iPtr->varFramePtr->nsPtr;
 
     if (objc < 3) {
@@ -9001,27 +9001,22 @@ TclNRCoroutineObjCmd(
 	return TCL_ERROR;
     }
 
-    /*
-     * FIXME: this is copy/pasted from Tcl_ProcObjCommand. Should have
-     * something in tclUtil.c to find the FQ name.
-     */
-
-    fullName = TclGetString(objv[1]);
-    TclGetNamespaceForQualName(interp, fullName, NULL, 0,
-	    &nsPtr, &altNsPtr, &cxtNsPtr, &procName);
+    procName = TclGetString(objv[1]);
+    TclGetNamespaceForQualName(interp, procName, inNsPtr, 0,
+	    &nsPtr, &altNsPtr, &cxtNsPtr, &simpleName);
 
     if (nsPtr == NULL) {
 	Tcl_SetObjResult(interp, Tcl_ObjPrintf(
                 "can't create procedure \"%s\": unknown namespace",
-                fullName));
+                procName));
         Tcl_SetErrorCode(interp, "TCL", "LOOKUP", "NAMESPACE", NULL);
 	return TCL_ERROR;
     }
-    if (procName == NULL) {
+    if (simpleName == NULL) {
 	Tcl_SetObjResult(interp, Tcl_ObjPrintf(
                 "can't create procedure \"%s\": bad procedure name",
-                fullName));
-        Tcl_SetErrorCode(interp, "TCL", "VALUE", "COMMAND", fullName, NULL);
+                procName));
+        Tcl_SetErrorCode(interp, "TCL", "VALUE", "COMMAND", procName, NULL);
 	return TCL_ERROR;
     }
 
@@ -9032,16 +9027,9 @@ TclNRCoroutineObjCmd(
 
     corPtr = ckalloc(sizeof(CoroutineData));
 
-    Tcl_DStringInit(&ds);
-    if (nsPtr != iPtr->globalNsPtr) {
-	Tcl_DStringAppend(&ds, nsPtr->fullName, -1);
-	TclDStringAppendLiteral(&ds, "::");
-    }
-    Tcl_DStringAppend(&ds, procName, -1);
-
-    cmdPtr = (Command *) Tcl_NRCreateCommand(interp, Tcl_DStringValue(&ds),
-	    /*objProc*/ NULL, TclNRInterpCoroutine, corPtr, DeleteCoroutine);
-    Tcl_DStringFree(&ds);
+    cmdPtr = (Command *) TclNRCreateCommandInNs(interp, simpleName,
+	    (Tcl_Namespace *)nsPtr, /*objProc*/ NULL, TclNRInterpCoroutine,
+	    corPtr, DeleteCoroutine);
 
     corPtr->cmdPtr = cmdPtr;
     cmdPtr->refCount++;
diff --git a/generic/tclEnsemble.c b/generic/tclEnsemble.c
new file mode 100644
index 0000000..92c0c76
--- /dev/null
+++ b/generic/tclEnsemble.c
@@ -0,0 +1,3709 @@
+/*
+ * tclEnsemble.c --
+ *
+ *	Contains support for ensembles (see TIP#112), which provide simple
+ *	mechanism for creating composite commands on top of namespaces.
+ *
+ * Copyright (c) 2005-2013 Donal K. Fellows.
+ *
+ * See the file "license.terms" for information on usage and redistribution of
+ * this file, and for a DISCLAIMER OF ALL WARRANTIES.
+ */
+
+#include "tclInt.h"
+#include "tclCompile.h"
+
+/*
+ * Declarations for functions local to this file:
+ */
+
+static inline Tcl_Obj *	NewNsObj(Tcl_Namespace *namespacePtr);
+static inline int	EnsembleUnknownCallback(Tcl_Interp *interp,
+			    EnsembleConfig *ensemblePtr, int objc,
+			    Tcl_Obj *const objv[], Tcl_Obj **prefixObjPtr);
+static int		NsEnsembleImplementationCmd(ClientData clientData,
+			    Tcl_Interp *interp,int objc,Tcl_Obj *const objv[]);
+static int		NsEnsembleImplementationCmdNR(ClientData clientData,
+			    Tcl_Interp *interp,int objc,Tcl_Obj *const objv[]);
+static void		BuildEnsembleConfig(EnsembleConfig *ensemblePtr);
+static int		NsEnsembleStringOrder(const void *strPtr1,
+			    const void *strPtr2);
+static void		DeleteEnsembleConfig(ClientData clientData);
+static void		MakeCachedEnsembleCommand(Tcl_Obj *objPtr,
+			    EnsembleConfig *ensemblePtr, Tcl_HashEntry *hPtr,
+			    Tcl_Obj *fix);
+static void		FreeEnsembleCmdRep(Tcl_Obj *objPtr);
+static void		DupEnsembleCmdRep(Tcl_Obj *objPtr, Tcl_Obj *copyPtr);
+static void		CompileToInvokedCommand(Tcl_Interp *interp,
+			    Tcl_Parse *parsePtr, Tcl_Obj *replacements,
+			    Command *cmdPtr, CompileEnv *envPtr);
+static int		CompileBasicNArgCommand(Tcl_Interp *interp,
+			    Tcl_Parse *parsePtr, Command *cmdPtr,
+			    CompileEnv *envPtr);
+
+static Tcl_NRPostProc	FreeER;
+
+/*
+ * The lists of subcommands and options for the [namespace ensemble] command.
+ */
+
+static const char *const ensembleSubcommands[] = {
+    "configure", "create", "exists", NULL
+};
+enum EnsSubcmds {
+    ENS_CONFIG, ENS_CREATE, ENS_EXISTS
+};
+
+static const char *const ensembleCreateOptions[] = {
+    "-command", "-map", "-parameters", "-prefixes", "-subcommands",
+    "-unknown", NULL
+};
+enum EnsCreateOpts {
+    CRT_CMD, CRT_MAP, CRT_PARAM, CRT_PREFIX, CRT_SUBCMDS, CRT_UNKNOWN
+};
+
+static const char *const ensembleConfigOptions[] = {
+    "-map", "-namespace", "-parameters", "-prefixes", "-subcommands",
+    "-unknown", NULL
+};
+enum EnsConfigOpts {
+    CONF_MAP, CONF_NAMESPACE, CONF_PARAM, CONF_PREFIX, CONF_SUBCMDS,
+    CONF_UNKNOWN
+};
+
+/*
+ * This structure defines a Tcl object type that contains a reference to an
+ * ensemble subcommand (e.g. the "length" in [string length ab]). It is used
+ * to cache the mapping between the subcommand itself and the real command
+ * that implements it.
+ */
+
+static const Tcl_ObjType ensembleCmdType = {
+    "ensembleCommand",		/* the type's name */
+    FreeEnsembleCmdRep,		/* freeIntRepProc */
+    DupEnsembleCmdRep,		/* dupIntRepProc */
+    NULL,			/* updateStringProc */
+    NULL			/* setFromAnyProc */
+};
+
+/*
+ * The internal rep for caching ensemble subcommand lookups and
+ * spell corrections.
+ */
+
+typedef struct {
+    int epoch;                  /* Used to confirm when the data in this
+                                 * really structure matches up with the
+                                 * ensemble. */
+    Command *token;             /* Reference to the command for which this
+                                 * structure is a cache of the resolution. */
+    Tcl_Obj *fix;               /* Corrected spelling, if needed. */
+    Tcl_HashEntry *hPtr;        /* Direct link to entry in the subcommand
+                                 * hash table. */
+} EnsembleCmdRep;
+
+
+static inline Tcl_Obj *
+NewNsObj(
+    Tcl_Namespace *namespacePtr)
+{
+    register Namespace *nsPtr = (Namespace *) namespacePtr;
+
+    if (namespacePtr == TclGetGlobalNamespace(nsPtr->interp)) {
+	return Tcl_NewStringObj("::", 2);
+    } else {
+	return Tcl_NewStringObj(nsPtr->fullName, -1);
+    }
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * TclNamespaceEnsembleCmd --
+ *
+ *	Invoked to implement the "namespace ensemble" command that creates and
+ *	manipulates ensembles built on top of namespaces. Handles the
+ *	following syntax:
+ *
+ *	    namespace ensemble name ?dictionary?
+ *
+ * Results:
+ *	Returns TCL_OK if successful, and TCL_ERROR if anything goes wrong.
+ *
+ * Side effects:
+ *	Creates the ensemble for the namespace if one did not previously
+ *	exist. Alternatively, alters the way that the ensemble's subcommand =>
+ *	implementation prefix is configured.
+ *
+ *----------------------------------------------------------------------
+ */
+
+int
+TclNamespaceEnsembleCmd(
+    ClientData dummy,
+    Tcl_Interp *interp,
+    int objc,
+    Tcl_Obj *const objv[])
+{
+    Tcl_Namespace *namespacePtr;
+    Namespace *nsPtr = (Namespace *) TclGetCurrentNamespace(interp), *cxtPtr,
+    	*foundNsPtr, *altFoundNsPtr, *actualCxtPtr;
+    Tcl_Command token;
+    Tcl_DictSearch search;
+    Tcl_Obj *listObj;
+    const char *simpleName;
+    int index, done;
+
+    if (nsPtr == NULL || nsPtr->flags & NS_DYING) {
+	if (!Tcl_InterpDeleted(interp)) {
+	    Tcl_SetObjResult(interp, Tcl_NewStringObj(
+		    "tried to manipulate ensemble of deleted namespace",
+		    -1));
+	    Tcl_SetErrorCode(interp, "TCL", "ENSEMBLE", "DEAD", NULL);
+	}
+	return TCL_ERROR;
+    }
+
+    if (objc < 2) {
+	Tcl_WrongNumArgs(interp, 1, objv, "subcommand ?arg ...?");
+	return TCL_ERROR;
+    }
+    if (Tcl_GetIndexFromObj(interp, objv[1], ensembleSubcommands,
+	    "subcommand", 0, &index) != TCL_OK) {
+	return TCL_ERROR;
+    }
+
+    switch ((enum EnsSubcmds) index) {
+    case ENS_CREATE: {
+	const char *name;
+	int len, allocatedMapFlag = 0;
+	/*
+	 * Defaults
+	 */
+	Tcl_Obj *subcmdObj = NULL;
+	Tcl_Obj *mapObj = NULL;
+	int permitPrefix = 1;
+	Tcl_Obj *unknownObj = NULL;
+	Tcl_Obj *paramObj = NULL;
+
+	/*
+	 * Check that we've got option-value pairs... [Bug 1558654]
+	 */
+
+	if (objc & 1) {
+	    Tcl_WrongNumArgs(interp, 2, objv, "?option value ...?");
+	    return TCL_ERROR;
+	}
+	objv += 2;
+	objc -= 2;
+
+	name = nsPtr->name;
+	cxtPtr = (Namespace *) nsPtr->parentPtr;
+
+	/*
+	 * Parse the option list, applying type checks as we go. Note that we
+	 * are not incrementing any reference counts in the objects at this
+	 * stage, so the presence of an option multiple times won't cause any
+	 * memory leaks.
+	 */
+
+	for (; objc>1 ; objc-=2,objv+=2) {
+	    if (Tcl_GetIndexFromObj(interp, objv[0], ensembleCreateOptions,
+		    "option", 0, &index) != TCL_OK) {
+		if (allocatedMapFlag) {
+		    Tcl_DecrRefCount(mapObj);
+		}
+		return TCL_ERROR;
+	    }
+	    switch ((enum EnsCreateOpts) index) {
+	    case CRT_CMD:
+		name = TclGetString(objv[1]);
+		cxtPtr = nsPtr;
+		continue;
+	    case CRT_SUBCMDS:
+		if (TclListObjLength(interp, objv[1], &len) != TCL_OK) {
+		    if (allocatedMapFlag) {
+			Tcl_DecrRefCount(mapObj);
+		    }
+		    return TCL_ERROR;
+		}
+		subcmdObj = (len > 0 ? objv[1] : NULL);
+		continue;
+	    case CRT_PARAM:
+		if (TclListObjLength(interp, objv[1], &len) != TCL_OK) {
+		    if (allocatedMapFlag) {
+			Tcl_DecrRefCount(mapObj);
+		    }
+		    return TCL_ERROR;
+		}
+		paramObj = (len > 0 ? objv[1] : NULL);
+		continue;
+	    case CRT_MAP: {
+		Tcl_Obj *patchedDict = NULL, *subcmdWordsObj;
+
+		/*
+		 * Verify that the map is sensible.
+		 */
+
+		if (Tcl_DictObjFirst(interp, objv[1], &search,
+			&subcmdWordsObj, &listObj, &done) != TCL_OK) {
+		    if (allocatedMapFlag) {
+			Tcl_DecrRefCount(mapObj);
+		    }
+		    return TCL_ERROR;
+		}
+		if (done) {
+		    mapObj = NULL;
+		    continue;
+		}
+		do {
+		    Tcl_Obj **listv;
+		    const char *cmd;
+
+		    if (TclListObjGetElements(interp, listObj, &len,
+			    &listv) != TCL_OK) {
+			Tcl_DictObjDone(&search);
+			if (patchedDict) {
+			    Tcl_DecrRefCount(patchedDict);
+			}
+			if (allocatedMapFlag) {
+			    Tcl_DecrRefCount(mapObj);
+			}
+			return TCL_ERROR;
+		    }
+		    if (len < 1) {
+			Tcl_SetObjResult(interp, Tcl_NewStringObj(
+				"ensemble subcommand implementations "
+				"must be non-empty lists", -1));
+			Tcl_SetErrorCode(interp, "TCL", "ENSEMBLE",
+				"EMPTY_TARGET", NULL);
+			Tcl_DictObjDone(&search);
+			if (patchedDict) {
+			    Tcl_DecrRefCount(patchedDict);
+			}
+			if (allocatedMapFlag) {
+			    Tcl_DecrRefCount(mapObj);
+			}
+			return TCL_ERROR;
+		    }
+		    cmd = TclGetString(listv[0]);
+		    if (!(cmd[0] == ':' && cmd[1] == ':')) {
+			Tcl_Obj *newList = Tcl_NewListObj(len, listv);
+			Tcl_Obj *newCmd = NewNsObj((Tcl_Namespace *) nsPtr);
+
+			if (nsPtr->parentPtr) {
+			    Tcl_AppendStringsToObj(newCmd, "::", NULL);
+			}
+			Tcl_AppendObjToObj(newCmd, listv[0]);
+			Tcl_ListObjReplace(NULL, newList, 0, 1, 1, &newCmd);
+			if (patchedDict == NULL) {
+			    patchedDict = Tcl_DuplicateObj(objv[1]);
+			}
+			Tcl_DictObjPut(NULL, patchedDict, subcmdWordsObj,
+				newList);
+		    }
+		    Tcl_DictObjNext(&search, &subcmdWordsObj,&listObj, &done);
+		} while (!done);
+
+		if (allocatedMapFlag) {
+		    Tcl_DecrRefCount(mapObj);
+		}
+		mapObj = (patchedDict ? patchedDict : objv[1]);
+		if (patchedDict) {
+		    allocatedMapFlag = 1;
+		}
+		continue;
+	    }
+	    case CRT_PREFIX:
+		if (Tcl_GetBooleanFromObj(interp, objv[1],
+			&permitPrefix) != TCL_OK) {
+		    if (allocatedMapFlag) {
+			Tcl_DecrRefCount(mapObj);
+		    }
+		    return TCL_ERROR;
+		}
+		continue;
+	    case CRT_UNKNOWN:
+		if (TclListObjLength(interp, objv[1], &len) != TCL_OK) {
+		    if (allocatedMapFlag) {
+			Tcl_DecrRefCount(mapObj);
+		    }
+		    return TCL_ERROR;
+		}
+		unknownObj = (len > 0 ? objv[1] : NULL);
+		continue;
+	    }
+	}
+
+	TclGetNamespaceForQualName(interp, name, cxtPtr,
+	TCL_CREATE_NS_IF_UNKNOWN, &foundNsPtr, &altFoundNsPtr, &actualCxtPtr,
+	&simpleName);
+
+	/*
+	 * Create the ensemble. Note that this might delete another ensemble
+	 * linked to the same namespace, so we must be careful. However, we
+	 * should be OK because we only link the namespace into the list once
+	 * we've created it (and after any deletions have occurred.)
+	 */
+
+	token = TclCreateEnsembleInNs(interp, simpleName,
+	     (Tcl_Namespace *) foundNsPtr, (Tcl_Namespace *) nsPtr,
+	     (permitPrefix ? TCL_ENSEMBLE_PREFIX : 0));
+	Tcl_SetEnsembleSubcommandList(interp, token, subcmdObj);
+	Tcl_SetEnsembleMappingDict(interp, token, mapObj);
+	Tcl_SetEnsembleUnknownHandler(interp, token, unknownObj);
+	Tcl_SetEnsembleParameterList(interp, token, paramObj);
+
+	/*
+	 * Tricky! Must ensure that the result is not shared (command delete
+	 * traces could have corrupted the pristine object that we started
+	 * with). [Snit test rename-1.5]
+	 */
+
+	Tcl_ResetResult(interp);
+	Tcl_GetCommandFullName(interp, token, Tcl_GetObjResult(interp));
+	return TCL_OK;
+    }
+
+    case ENS_EXISTS:
+	if (objc != 3) {
+	    Tcl_WrongNumArgs(interp, 2, objv, "cmdname");
+	    return TCL_ERROR;
+	}
+	Tcl_SetObjResult(interp, Tcl_NewBooleanObj(
+		Tcl_FindEnsemble(interp, objv[2], 0) != NULL));
+	return TCL_OK;
+
+    case ENS_CONFIG:
+	if (objc < 3 || (objc != 4 && !(objc & 1))) {
+	    Tcl_WrongNumArgs(interp, 2, objv,
+		    "cmdname ?-option value ...? ?arg ...?");
+	    return TCL_ERROR;
+	}
+	token = Tcl_FindEnsemble(interp, objv[2], TCL_LEAVE_ERR_MSG);
+	if (token == NULL) {
+	    return TCL_ERROR;
+	}
+
+	if (objc == 4) {
+	    Tcl_Obj *resultObj = NULL;		/* silence gcc 4 warning */
+
+	    if (Tcl_GetIndexFromObj(interp, objv[3], ensembleConfigOptions,
+		    "option", 0, &index) != TCL_OK) {
+		return TCL_ERROR;
+	    }
+	    switch ((enum EnsConfigOpts) index) {
+	    case CONF_SUBCMDS:
+		Tcl_GetEnsembleSubcommandList(NULL, token, &resultObj);
+		if (resultObj != NULL) {
+		    Tcl_SetObjResult(interp, resultObj);
+		}
+		break;
+	    case CONF_PARAM:
+		Tcl_GetEnsembleParameterList(NULL, token, &resultObj);
+		if (resultObj != NULL) {
+		    Tcl_SetObjResult(interp, resultObj);
+		}
+		break;
+	    case CONF_MAP:
+		Tcl_GetEnsembleMappingDict(NULL, token, &resultObj);
+		if (resultObj != NULL) {
+		    Tcl_SetObjResult(interp, resultObj);
+		}
+		break;
+	    case CONF_NAMESPACE:
+		namespacePtr = NULL;		/* silence gcc 4 warning */
+		Tcl_GetEnsembleNamespace(NULL, token, &namespacePtr);
+		Tcl_SetObjResult(interp, NewNsObj(namespacePtr));
+		break;
+	    case CONF_PREFIX: {
+		int flags = 0;			/* silence gcc 4 warning */
+
+		Tcl_GetEnsembleFlags(NULL, token, &flags);
+		Tcl_SetObjResult(interp,
+			Tcl_NewBooleanObj(flags & TCL_ENSEMBLE_PREFIX));
+		break;
+	    }
+	    case CONF_UNKNOWN:
+		Tcl_GetEnsembleUnknownHandler(NULL, token, &resultObj);
+		if (resultObj != NULL) {
+		    Tcl_SetObjResult(interp, resultObj);
+		}
+		break;
+	    }
+	} else if (objc == 3) {
+	    /*
+	     * Produce list of all information.
+	     */
+
+	    Tcl_Obj *resultObj, *tmpObj = NULL;	/* silence gcc 4 warning */
+	    int flags = 0;			/* silence gcc 4 warning */
+
+	    TclNewObj(resultObj);
+
+	    /* -map option */
+	    Tcl_ListObjAppendElement(NULL, resultObj,
+		    Tcl_NewStringObj(ensembleConfigOptions[CONF_MAP], -1));
+	    Tcl_GetEnsembleMappingDict(NULL, token, &tmpObj);
+	    Tcl_ListObjAppendElement(NULL, resultObj,
+		    (tmpObj != NULL) ? tmpObj : Tcl_NewObj());
+
+	    /* -namespace option */
+	    Tcl_ListObjAppendElement(NULL, resultObj,
+		    Tcl_NewStringObj(ensembleConfigOptions[CONF_NAMESPACE],
+			    -1));
+	    namespacePtr = NULL;		/* silence gcc 4 warning */
+	    Tcl_GetEnsembleNamespace(NULL, token, &namespacePtr);
+	    Tcl_ListObjAppendElement(NULL, resultObj, NewNsObj(namespacePtr));
+
+	    /* -parameters option */
+	    Tcl_ListObjAppendElement(NULL, resultObj,
+		    Tcl_NewStringObj(ensembleConfigOptions[CONF_PARAM], -1));
+	    Tcl_GetEnsembleParameterList(NULL, token, &tmpObj);
+	    Tcl_ListObjAppendElement(NULL, resultObj,
+		    (tmpObj != NULL) ? tmpObj : Tcl_NewObj());
+
+	    /* -prefix option */
+	    Tcl_ListObjAppendElement(NULL, resultObj,
+		    Tcl_NewStringObj(ensembleConfigOptions[CONF_PREFIX], -1));
+	    Tcl_GetEnsembleFlags(NULL, token, &flags);
+	    Tcl_ListObjAppendElement(NULL, resultObj,
+		    Tcl_NewBooleanObj(flags & TCL_ENSEMBLE_PREFIX));
+
+	    /* -subcommands option */
+	    Tcl_ListObjAppendElement(NULL, resultObj,
+		    Tcl_NewStringObj(ensembleConfigOptions[CONF_SUBCMDS],-1));
+	    Tcl_GetEnsembleSubcommandList(NULL, token, &tmpObj);
+	    Tcl_ListObjAppendElement(NULL, resultObj,
+		    (tmpObj != NULL) ? tmpObj : Tcl_NewObj());
+
+	    /* -unknown option */
+	    Tcl_ListObjAppendElement(NULL, resultObj,
+		    Tcl_NewStringObj(ensembleConfigOptions[CONF_UNKNOWN],-1));
+	    Tcl_GetEnsembleUnknownHandler(NULL, token, &tmpObj);
+	    Tcl_ListObjAppendElement(NULL, resultObj,
+		    (tmpObj != NULL) ? tmpObj : Tcl_NewObj());
+
+	    Tcl_SetObjResult(interp, resultObj);
+	} else {
+	    int len, allocatedMapFlag = 0;
+	    Tcl_Obj *subcmdObj = NULL, *mapObj = NULL, *paramObj = NULL,
+		    *unknownObj = NULL; /* Defaults, silence gcc 4 warnings */
+	    int permitPrefix, flags = 0;	/* silence gcc 4 warning */
+
+	    Tcl_GetEnsembleSubcommandList(NULL, token, &subcmdObj);
+	    Tcl_GetEnsembleMappingDict(NULL, token, &mapObj);
+	    Tcl_GetEnsembleParameterList(NULL, token, &paramObj);
+	    Tcl_GetEnsembleUnknownHandler(NULL, token, &unknownObj);
+	    Tcl_GetEnsembleFlags(NULL, token, &flags);
+	    permitPrefix = (flags & TCL_ENSEMBLE_PREFIX) != 0;
+
+	    objv += 3;
+	    objc -= 3;
+
+	    /*
+	     * Parse the option list, applying type checks as we go. Note that
+	     * we are not incrementing any reference counts in the objects at
+	     * this stage, so the presence of an option multiple times won't
+	     * cause any memory leaks.
+	     */
+
+	    for (; objc>0 ; objc-=2,objv+=2) {
+		if (Tcl_GetIndexFromObj(interp, objv[0],ensembleConfigOptions,
+			"option", 0, &index) != TCL_OK) {
+		freeMapAndError:
+		    if (allocatedMapFlag) {
+			Tcl_DecrRefCount(mapObj);
+		    }
+		    return TCL_ERROR;
+		}
+		switch ((enum EnsConfigOpts) index) {
+		case CONF_SUBCMDS:
+		    if (TclListObjLength(interp, objv[1], &len) != TCL_OK) {
+			goto freeMapAndError;
+		    }
+		    subcmdObj = (len > 0 ? objv[1] : NULL);
+		    continue;
+		case CONF_PARAM:
+		    if (TclListObjLength(interp, objv[1], &len) != TCL_OK) {
+			goto freeMapAndError;
+		    }
+		    paramObj = (len > 0 ? objv[1] : NULL);
+		    continue;
+		case CONF_MAP: {
+		    Tcl_Obj *patchedDict = NULL, *subcmdWordsObj, **listv;
+		    const char *cmd;
+
+		    /*
+		     * Verify that the map is sensible.
+		     */
+
+		    if (Tcl_DictObjFirst(interp, objv[1], &search,
+			    &subcmdWordsObj, &listObj, &done) != TCL_OK) {
+			goto freeMapAndError;
+		    }
+		    if (done) {
+			mapObj = NULL;
+			continue;
+		    }
+		    do {
+			if (TclListObjGetElements(interp, listObj, &len,
+				&listv) != TCL_OK) {
+			    Tcl_DictObjDone(&search);
+			    if (patchedDict) {
+				Tcl_DecrRefCount(patchedDict);
+			    }
+			    goto freeMapAndError;
+			}
+			if (len < 1) {
+			    Tcl_SetObjResult(interp, Tcl_NewStringObj(
+				    "ensemble subcommand implementations "
+				    "must be non-empty lists", -1));
+			    Tcl_SetErrorCode(interp, "TCL", "ENSEMBLE",
+				    "EMPTY_TARGET", NULL);
+			    Tcl_DictObjDone(&search);
+			    if (patchedDict) {
+				Tcl_DecrRefCount(patchedDict);
+			    }
+			    goto freeMapAndError;
+			}
+			cmd = TclGetString(listv[0]);
+			if (!(cmd[0] == ':' && cmd[1] == ':')) {
+			    Tcl_Obj *newList = Tcl_DuplicateObj(listObj);
+			    Tcl_Obj *newCmd = NewNsObj((Tcl_Namespace*)nsPtr);
+
+			    if (nsPtr->parentPtr) {
+				Tcl_AppendStringsToObj(newCmd, "::", NULL);
+			    }
+			    Tcl_AppendObjToObj(newCmd, listv[0]);
+			    Tcl_ListObjReplace(NULL, newList, 0,1, 1,&newCmd);
+			    if (patchedDict == NULL) {
+				patchedDict = Tcl_DuplicateObj(objv[1]);
+			    }
+			    Tcl_DictObjPut(NULL, patchedDict, subcmdWordsObj,
+				    newList);
+			}
+			Tcl_DictObjNext(&search, &subcmdWordsObj, &listObj,
+				&done);
+		    } while (!done);
+		    if (allocatedMapFlag) {
+			Tcl_DecrRefCount(mapObj);
+		    }
+		    mapObj = (patchedDict ? patchedDict : objv[1]);
+		    if (patchedDict) {
+			allocatedMapFlag = 1;
+		    }
+		    continue;
+		}
+		case CONF_NAMESPACE:
+		    Tcl_SetObjResult(interp, Tcl_NewStringObj(
+			    "option -namespace is read-only", -1));
+		    Tcl_SetErrorCode(interp, "TCL", "ENSEMBLE", "READ_ONLY",
+			    NULL);
+		    goto freeMapAndError;
+		case CONF_PREFIX:
+		    if (Tcl_GetBooleanFromObj(interp, objv[1],
+			    &permitPrefix) != TCL_OK) {
+			goto freeMapAndError;
+		    }
+		    continue;
+		case CONF_UNKNOWN:
+		    if (TclListObjLength(interp, objv[1], &len) != TCL_OK) {
+			goto freeMapAndError;
+		    }
+		    unknownObj = (len > 0 ? objv[1] : NULL);
+		    continue;
+		}
+	    }
+
+	    /*
+	     * Update the namespace now that we've finished the parsing stage.
+	     */
+
+	    flags = (permitPrefix ? flags|TCL_ENSEMBLE_PREFIX
+		    : flags&~TCL_ENSEMBLE_PREFIX);
+	    Tcl_SetEnsembleSubcommandList(interp, token, subcmdObj);
+	    Tcl_SetEnsembleMappingDict(interp, token, mapObj);
+	    Tcl_SetEnsembleParameterList(interp, token, paramObj);
+	    Tcl_SetEnsembleUnknownHandler(interp, token, unknownObj);
+	    Tcl_SetEnsembleFlags(interp, token, flags);
+	}
+	return TCL_OK;
+
+    default:
+	Tcl_Panic("unexpected ensemble command");
+    }
+    return TCL_OK;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * TclCreateEnsembleInNs --
+ *
+ *	Like Tcl_CreateEnsemble, but additionally accepts as an argument the
+ *	name of the namespace to create the command in.
+ *
+ *----------------------------------------------------------------------
+ */
+
+Tcl_Command
+TclCreateEnsembleInNs(
+    Tcl_Interp *interp, 
+			
+    const char *name,   /* Simple name of command to create (no */
+			/* namespace components). */
+    Tcl_Namespace       /* Name of namespace to create the command in. */ 
+    *nameNsPtr,	
+    Tcl_Namespace
+    *ensembleNsPtr,	/* Name of the namespace for the ensemble. */
+    int flags
+    )
+{
+    Namespace *nsPtr = (Namespace *) ensembleNsPtr;
+    EnsembleConfig *ensemblePtr;
+    Tcl_Command token;
+
+    ensemblePtr = ckalloc(sizeof(EnsembleConfig));
+    token = TclNRCreateCommandInNs(interp, name,
+	(Tcl_Namespace *) nameNsPtr, NsEnsembleImplementationCmd,
+	NsEnsembleImplementationCmdNR, ensemblePtr, DeleteEnsembleConfig);
+    if (token == NULL) {
+	ckfree(ensemblePtr);
+	return NULL;
+    }
+
+    ensemblePtr->nsPtr = nsPtr;
+    ensemblePtr->epoch = 0;
+    Tcl_InitHashTable(&ensemblePtr->subcommandTable, TCL_STRING_KEYS);
+    ensemblePtr->subcommandArrayPtr = NULL;
+    ensemblePtr->subcmdList = NULL;
+    ensemblePtr->subcommandDict = NULL;
+    ensemblePtr->flags = flags;
+    ensemblePtr->numParameters = 0;
+    ensemblePtr->parameterList = NULL;
+    ensemblePtr->unknownHandler = NULL;
+    ensemblePtr->token = token;
+    ensemblePtr->next = (EnsembleConfig *) nsPtr->ensembles;
+    nsPtr->ensembles = (Tcl_Ensemble *) ensemblePtr;
+
+    /*
+     * Trigger an eventual recomputation of the ensemble command set. Note
+     * that this is slightly tricky, as it means that we are not actually
+     * counting the number of namespace export actions, but it is the simplest
+     * way to go!
+     */
+
+    nsPtr->exportLookupEpoch++;
+
+    if (flags & ENSEMBLE_COMPILE) {
+	((Command *) ensemblePtr->token)->compileProc = TclCompileEnsemble;
+    }
+
+    return ensemblePtr->token;
+
+}
+
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * Tcl_CreateEnsemble
+ *
+ *	Create a simple ensemble attached to the given namespace.
+ *
+ *	Deprecated by TclCreateEnsembleInNs.
+ *
+ * Value
+ *
+ *	The token for the command created.
+ *
+ * Effect
+ *	The ensemble is created and marked for compilation.
+ *
+ *
+ *----------------------------------------------------------------------
+ */
+
+Tcl_Command
+Tcl_CreateEnsemble(
+    Tcl_Interp *interp,
+    const char *name,
+    Tcl_Namespace *namespacePtr,
+    int flags)
+{
+    Tcl_Obj *nameObj = NULL;
+    Namespace *nsPtr = (Namespace *)namespacePtr, *foundNsPtr, *altNsPtr,
+    	*actualNsPtr;
+    const char * simpleName;
+
+    if (nsPtr == NULL) {
+	nsPtr = (Namespace *) TclGetCurrentNamespace(interp);
+    }
+
+    TclGetNamespaceForQualName(interp, name, nsPtr, 0,
+    	&foundNsPtr, &altNsPtr, &actualNsPtr, &simpleName);
+    if (nameObj != NULL) {
+    	TclDecrRefCount(nameObj);
+    }
+    return TclCreateEnsembleInNs(interp, simpleName,
+	(Tcl_Namespace *) foundNsPtr, (Tcl_Namespace *) nsPtr, flags);
+}
+
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * Tcl_SetEnsembleSubcommandList --
+ *
+ *	Set the subcommand list for a particular ensemble.
+ *
+ * Results:
+ *	Tcl result code (error if command token does not indicate an ensemble
+ *	or the subcommand list - if non-NULL - is not a list).
+ *
+ * Side effects:
+ *	The ensemble is updated and marked for recompilation.
+ *
+ *----------------------------------------------------------------------
+ */
+
+int
+Tcl_SetEnsembleSubcommandList(
+    Tcl_Interp *interp,
+    Tcl_Command token,
+    Tcl_Obj *subcmdList)
+{
+    Command *cmdPtr = (Command *) token;
+    EnsembleConfig *ensemblePtr;
+    Tcl_Obj *oldList;
+
+    if (cmdPtr->objProc != NsEnsembleImplementationCmd) {
+	Tcl_SetObjResult(interp, Tcl_NewStringObj(
+		"command is not an ensemble", -1));
+	Tcl_SetErrorCode(interp, "TCL", "ENSEMBLE", "NOT_ENSEMBLE", NULL);
+	return TCL_ERROR;
+    }
+    if (subcmdList != NULL) {
+	int length;
+
+	if (TclListObjLength(interp, subcmdList, &length) != TCL_OK) {
+	    return TCL_ERROR;
+	}
+	if (length < 1) {
+	    subcmdList = NULL;
+	}
+    }
+
+    ensemblePtr = cmdPtr->objClientData;
+    oldList = ensemblePtr->subcmdList;
+    ensemblePtr->subcmdList = subcmdList;
+    if (subcmdList != NULL) {
+	Tcl_IncrRefCount(subcmdList);
+    }
+    if (oldList != NULL) {
+	TclDecrRefCount(oldList);
+    }
+
+    /*
+     * Trigger an eventual recomputation of the ensemble command set. Note
+     * that this is slightly tricky, as it means that we are not actually
+     * counting the number of namespace export actions, but it is the simplest
+     * way to go!
+     */
+
+    ensemblePtr->nsPtr->exportLookupEpoch++;
+
+    /*
+     * Special hack to make compiling of [info exists] work when the
+     * dictionary is modified.
+     */
+
+    if (cmdPtr->compileProc != NULL) {
+	((Interp *) interp)->compileEpoch++;
+    }
+
+    return TCL_OK;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * Tcl_SetEnsembleParameterList --
+ *
+ *	Set the parameter list for a particular ensemble.
+ *
+ * Results:
+ *	Tcl result code (error if command token does not indicate an ensemble
+ *	or the parameter list - if non-NULL - is not a list).
+ *
+ * Side effects:
+ *	The ensemble is updated and marked for recompilation.
+ *
+ *----------------------------------------------------------------------
+ */
+
+int
+Tcl_SetEnsembleParameterList(
+    Tcl_Interp *interp,
+    Tcl_Command token,
+    Tcl_Obj *paramList)
+{
+    Command *cmdPtr = (Command *) token;
+    EnsembleConfig *ensemblePtr;
+    Tcl_Obj *oldList;
+    int length;
+
+    if (cmdPtr->objProc != NsEnsembleImplementationCmd) {
+	Tcl_SetObjResult(interp, Tcl_NewStringObj(
+		"command is not an ensemble", -1));
+	Tcl_SetErrorCode(interp, "TCL", "ENSEMBLE", "NOT_ENSEMBLE", NULL);
+	return TCL_ERROR;
+    }
+    if (paramList == NULL) {
+	length = 0;
+    } else {
+	if (TclListObjLength(interp, paramList, &length) != TCL_OK) {
+	    return TCL_ERROR;
+	}
+	if (length < 1) {
+	    paramList = NULL;
+	}
+    }
+
+    ensemblePtr = cmdPtr->objClientData;
+    oldList = ensemblePtr->parameterList;
+    ensemblePtr->parameterList = paramList;
+    if (paramList != NULL) {
+	Tcl_IncrRefCount(paramList);
+    }
+    if (oldList != NULL) {
+	TclDecrRefCount(oldList);
+    }
+    ensemblePtr->numParameters = length;
+
+    /*
+     * Trigger an eventual recomputation of the ensemble command set. Note
+     * that this is slightly tricky, as it means that we are not actually
+     * counting the number of namespace export actions, but it is the simplest
+     * way to go!
+     */
+
+    ensemblePtr->nsPtr->exportLookupEpoch++;
+
+    /*
+     * Special hack to make compiling of [info exists] work when the
+     * dictionary is modified.
+     */
+
+    if (cmdPtr->compileProc != NULL) {
+	((Interp *) interp)->compileEpoch++;
+    }
+
+    return TCL_OK;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * Tcl_SetEnsembleMappingDict --
+ *
+ *	Set the mapping dictionary for a particular ensemble.
+ *
+ * Results:
+ *	Tcl result code (error if command token does not indicate an ensemble
+ *	or the mapping - if non-NULL - is not a dict).
+ *
+ * Side effects:
+ *	The ensemble is updated and marked for recompilation.
+ *
+ *----------------------------------------------------------------------
+ */
+
+int
+Tcl_SetEnsembleMappingDict(
+    Tcl_Interp *interp,
+    Tcl_Command token,
+    Tcl_Obj *mapDict)
+{
+    Command *cmdPtr = (Command *) token;
+    EnsembleConfig *ensemblePtr;
+    Tcl_Obj *oldDict;
+
+    if (cmdPtr->objProc != NsEnsembleImplementationCmd) {
+	Tcl_SetObjResult(interp, Tcl_NewStringObj(
+		"command is not an ensemble", -1));
+	Tcl_SetErrorCode(interp, "TCL", "ENSEMBLE", "NOT_ENSEMBLE", NULL);
+	return TCL_ERROR;
+    }
+    if (mapDict != NULL) {
+	int size, done;
+	Tcl_DictSearch search;
+	Tcl_Obj *valuePtr;
+
+	if (Tcl_DictObjSize(interp, mapDict, &size) != TCL_OK) {
+	    return TCL_ERROR;
+	}
+
+	for (Tcl_DictObjFirst(NULL, mapDict, &search, NULL, &valuePtr, &done);
+		!done; Tcl_DictObjNext(&search, NULL, &valuePtr, &done)) {
+	    Tcl_Obj *cmdObjPtr;
+	    const char *bytes;
+
+	    if (Tcl_ListObjIndex(interp, valuePtr, 0, &cmdObjPtr) != TCL_OK) {
+		Tcl_DictObjDone(&search);
+		return TCL_ERROR;
+	    }
+	    bytes = TclGetString(cmdObjPtr);
+	    if (bytes[0] != ':' || bytes[1] != ':') {
+		Tcl_SetObjResult(interp, Tcl_NewStringObj(
+			"ensemble target is not a fully-qualified command",
+			-1));
+		Tcl_SetErrorCode(interp, "TCL", "ENSEMBLE",
+			"UNQUALIFIED_TARGET", NULL);
+		Tcl_DictObjDone(&search);
+		return TCL_ERROR;
+	    }
+	}
+
+	if (size < 1) {
+	    mapDict = NULL;
+	}
+    }
+
+    ensemblePtr = cmdPtr->objClientData;
+    oldDict = ensemblePtr->subcommandDict;
+    ensemblePtr->subcommandDict = mapDict;
+    if (mapDict != NULL) {
+	Tcl_IncrRefCount(mapDict);
+    }
+    if (oldDict != NULL) {
+	TclDecrRefCount(oldDict);
+    }
+
+    /*
+     * Trigger an eventual recomputation of the ensemble command set. Note
+     * that this is slightly tricky, as it means that we are not actually
+     * counting the number of namespace export actions, but it is the simplest
+     * way to go!
+     */
+
+    ensemblePtr->nsPtr->exportLookupEpoch++;
+
+    /*
+     * Special hack to make compiling of [info exists] work when the
+     * dictionary is modified.
+     */
+
+    if (cmdPtr->compileProc != NULL) {
+	((Interp *) interp)->compileEpoch++;
+    }
+
+    return TCL_OK;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * Tcl_SetEnsembleUnknownHandler --
+ *
+ *	Set the unknown handler for a particular ensemble.
+ *
+ * Results:
+ *	Tcl result code (error if command token does not indicate an ensemble
+ *	or the unknown handler - if non-NULL - is not a list).
+ *
+ * Side effects:
+ *	The ensemble is updated and marked for recompilation.
+ *
+ *----------------------------------------------------------------------
+ */
+
+int
+Tcl_SetEnsembleUnknownHandler(
+    Tcl_Interp *interp,
+    Tcl_Command token,
+    Tcl_Obj *unknownList)
+{
+    Command *cmdPtr = (Command *) token;
+    EnsembleConfig *ensemblePtr;
+    Tcl_Obj *oldList;
+
+    if (cmdPtr->objProc != NsEnsembleImplementationCmd) {
+	Tcl_SetObjResult(interp, Tcl_NewStringObj(
+		"command is not an ensemble", -1));
+	Tcl_SetErrorCode(interp, "TCL", "ENSEMBLE", "NOT_ENSEMBLE", NULL);
+	return TCL_ERROR;
+    }
+    if (unknownList != NULL) {
+	int length;
+
+	if (TclListObjLength(interp, unknownList, &length) != TCL_OK) {
+	    return TCL_ERROR;
+	}
+	if (length < 1) {
+	    unknownList = NULL;
+	}
+    }
+
+    ensemblePtr = cmdPtr->objClientData;
+    oldList = ensemblePtr->unknownHandler;
+    ensemblePtr->unknownHandler = unknownList;
+    if (unknownList != NULL) {
+	Tcl_IncrRefCount(unknownList);
+    }
+    if (oldList != NULL) {
+	TclDecrRefCount(oldList);
+    }
+
+    /*
+     * Trigger an eventual recomputation of the ensemble command set. Note
+     * that this is slightly tricky, as it means that we are not actually
+     * counting the number of namespace export actions, but it is the simplest
+     * way to go!
+     */
+
+    ensemblePtr->nsPtr->exportLookupEpoch++;
+
+    return TCL_OK;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * Tcl_SetEnsembleFlags --
+ *
+ *	Set the flags for a particular ensemble.
+ *
+ * Results:
+ *	Tcl result code (error if command token does not indicate an
+ *	ensemble).
+ *
+ * Side effects:
+ *	The ensemble is updated and marked for recompilation.
+ *
+ *----------------------------------------------------------------------
+ */
+
+int
+Tcl_SetEnsembleFlags(
+    Tcl_Interp *interp,
+    Tcl_Command token,
+    int flags)
+{
+    Command *cmdPtr = (Command *) token;
+    EnsembleConfig *ensemblePtr;
+    int wasCompiled;
+
+    if (cmdPtr->objProc != NsEnsembleImplementationCmd) {
+	Tcl_SetObjResult(interp, Tcl_NewStringObj(
+		"command is not an ensemble", -1));
+	Tcl_SetErrorCode(interp, "TCL", "ENSEMBLE", "NOT_ENSEMBLE", NULL);
+	return TCL_ERROR;
+    }
+
+    ensemblePtr = cmdPtr->objClientData;
+    wasCompiled = ensemblePtr->flags & ENSEMBLE_COMPILE;
+
+    /*
+     * This API refuses to set the ENSEMBLE_DEAD flag...
+     */
+
+    ensemblePtr->flags &= ENSEMBLE_DEAD;
+    ensemblePtr->flags |= flags & ~ENSEMBLE_DEAD;
+
+    /*
+     * Trigger an eventual recomputation of the ensemble command set. Note
+     * that this is slightly tricky, as it means that we are not actually
+     * counting the number of namespace export actions, but it is the simplest
+     * way to go!
+     */
+
+    ensemblePtr->nsPtr->exportLookupEpoch++;
+
+    /*
+     * If the ENSEMBLE_COMPILE flag status was changed, install or remove the
+     * compiler function and bump the interpreter's compilation epoch so that
+     * bytecode gets regenerated.
+     */
+
+    if (flags & ENSEMBLE_COMPILE) {
+	if (!wasCompiled) {
+	    ((Command*) ensemblePtr->token)->compileProc = TclCompileEnsemble;
+	    ((Interp *) interp)->compileEpoch++;
+	}
+    } else {
+	if (wasCompiled) {
+	    ((Command *) ensemblePtr->token)->compileProc = NULL;
+	    ((Interp *) interp)->compileEpoch++;
+	}
+    }
+
+    return TCL_OK;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * Tcl_GetEnsembleSubcommandList --
+ *
+ *	Get the list of subcommands associated with a particular ensemble.
+ *
+ * Results:
+ *	Tcl result code (error if command token does not indicate an
+ *	ensemble). The list of subcommands is returned by updating the
+ *	variable pointed to by the last parameter (NULL if this is to be
+ *	derived from the mapping dictionary or the associated namespace's
+ *	exported commands).
+ *
+ * Side effects:
+ *	None
+ *
+ *----------------------------------------------------------------------
+ */
+
+int
+Tcl_GetEnsembleSubcommandList(
+    Tcl_Interp *interp,
+    Tcl_Command token,
+    Tcl_Obj **subcmdListPtr)
+{
+    Command *cmdPtr = (Command *) token;
+    EnsembleConfig *ensemblePtr;
+
+    if (cmdPtr->objProc != NsEnsembleImplementationCmd) {
+	if (interp != NULL) {
+	    Tcl_SetObjResult(interp, Tcl_NewStringObj(
+		    "command is not an ensemble", -1));
+	    Tcl_SetErrorCode(interp, "TCL", "ENSEMBLE", "NOT_ENSEMBLE", NULL);
+	}
+	return TCL_ERROR;
+    }
+
+    ensemblePtr = cmdPtr->objClientData;
+    *subcmdListPtr = ensemblePtr->subcmdList;
+    return TCL_OK;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * Tcl_GetEnsembleParameterList --
+ *
+ *	Get the list of parameters associated with a particular ensemble.
+ *
+ * Results:
+ *	Tcl result code (error if command token does not indicate an
+ *	ensemble). The list of parameters is returned by updating the
+ *	variable pointed to by the last parameter (NULL if there are
+ *	no parameters).
+ *
+ * Side effects:
+ *	None
+ *
+ *----------------------------------------------------------------------
+ */
+
+int
+Tcl_GetEnsembleParameterList(
+    Tcl_Interp *interp,
+    Tcl_Command token,
+    Tcl_Obj **paramListPtr)
+{
+    Command *cmdPtr = (Command *) token;
+    EnsembleConfig *ensemblePtr;
+
+    if (cmdPtr->objProc != NsEnsembleImplementationCmd) {
+	if (interp != NULL) {
+	    Tcl_SetObjResult(interp, Tcl_NewStringObj(
+		    "command is not an ensemble", -1));
+	    Tcl_SetErrorCode(interp, "TCL", "ENSEMBLE", "NOT_ENSEMBLE", NULL);
+	}
+	return TCL_ERROR;
+    }
+
+    ensemblePtr = cmdPtr->objClientData;
+    *paramListPtr = ensemblePtr->parameterList;
+    return TCL_OK;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * Tcl_GetEnsembleMappingDict --
+ *
+ *	Get the command mapping dictionary associated with a particular
+ *	ensemble.
+ *
+ * Results:
+ *	Tcl result code (error if command token does not indicate an
+ *	ensemble). The mapping dict is returned by updating the variable
+ *	pointed to by the last parameter (NULL if none is installed).
+ *
+ * Side effects:
+ *	None
+ *
+ *----------------------------------------------------------------------
+ */
+
+int
+Tcl_GetEnsembleMappingDict(
+    Tcl_Interp *interp,
+    Tcl_Command token,
+    Tcl_Obj **mapDictPtr)
+{
+    Command *cmdPtr = (Command *) token;
+    EnsembleConfig *ensemblePtr;
+
+    if (cmdPtr->objProc != NsEnsembleImplementationCmd) {
+	if (interp != NULL) {
+	    Tcl_SetObjResult(interp, Tcl_NewStringObj(
+		    "command is not an ensemble", -1));
+	    Tcl_SetErrorCode(interp, "TCL", "ENSEMBLE", "NOT_ENSEMBLE", NULL);
+	}
+	return TCL_ERROR;
+    }
+
+    ensemblePtr = cmdPtr->objClientData;
+    *mapDictPtr = ensemblePtr->subcommandDict;
+    return TCL_OK;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * Tcl_GetEnsembleUnknownHandler --
+ *
+ *	Get the unknown handler associated with a particular ensemble.
+ *
+ * Results:
+ *	Tcl result code (error if command token does not indicate an
+ *	ensemble). The unknown handler is returned by updating the variable
+ *	pointed to by the last parameter (NULL if no handler is installed).
+ *
+ * Side effects:
+ *	None
+ *
+ *----------------------------------------------------------------------
+ */
+
+int
+Tcl_GetEnsembleUnknownHandler(
+    Tcl_Interp *interp,
+    Tcl_Command token,
+    Tcl_Obj **unknownListPtr)
+{
+    Command *cmdPtr = (Command *) token;
+    EnsembleConfig *ensemblePtr;
+
+    if (cmdPtr->objProc != NsEnsembleImplementationCmd) {
+	if (interp != NULL) {
+	    Tcl_SetObjResult(interp, Tcl_NewStringObj(
+		    "command is not an ensemble", -1));
+	    Tcl_SetErrorCode(interp, "TCL", "ENSEMBLE", "NOT_ENSEMBLE", NULL);
+	}
+	return TCL_ERROR;
+    }
+
+    ensemblePtr = cmdPtr->objClientData;
+    *unknownListPtr = ensemblePtr->unknownHandler;
+    return TCL_OK;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * Tcl_GetEnsembleFlags --
+ *
+ *	Get the flags for a particular ensemble.
+ *
+ * Results:
+ *	Tcl result code (error if command token does not indicate an
+ *	ensemble). The flags are returned by updating the variable pointed to
+ *	by the last parameter.
+ *
+ * Side effects:
+ *	None
+ *
+ *----------------------------------------------------------------------
+ */
+
+int
+Tcl_GetEnsembleFlags(
+    Tcl_Interp *interp,
+    Tcl_Command token,
+    int *flagsPtr)
+{
+    Command *cmdPtr = (Command *) token;
+    EnsembleConfig *ensemblePtr;
+
+    if (cmdPtr->objProc != NsEnsembleImplementationCmd) {
+	if (interp != NULL) {
+	    Tcl_SetObjResult(interp, Tcl_NewStringObj(
+		    "command is not an ensemble", -1));
+	    Tcl_SetErrorCode(interp, "TCL", "ENSEMBLE", "NOT_ENSEMBLE", NULL);
+	}
+	return TCL_ERROR;
+    }
+
+    ensemblePtr = cmdPtr->objClientData;
+    *flagsPtr = ensemblePtr->flags;
+    return TCL_OK;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * Tcl_GetEnsembleNamespace --
+ *
+ *	Get the namespace associated with a particular ensemble.
+ *
+ * Results:
+ *	Tcl result code (error if command token does not indicate an
+ *	ensemble). Namespace is returned by updating the variable pointed to
+ *	by the last parameter.
+ *
+ * Side effects:
+ *	None
+ *
+ *----------------------------------------------------------------------
+ */
+
+int
+Tcl_GetEnsembleNamespace(
+    Tcl_Interp *interp,
+    Tcl_Command token,
+    Tcl_Namespace **namespacePtrPtr)
+{
+    Command *cmdPtr = (Command *) token;
+    EnsembleConfig *ensemblePtr;
+
+    if (cmdPtr->objProc != NsEnsembleImplementationCmd) {
+	if (interp != NULL) {
+	    Tcl_SetObjResult(interp, Tcl_NewStringObj(
+		    "command is not an ensemble", -1));
+	    Tcl_SetErrorCode(interp, "TCL", "ENSEMBLE", "NOT_ENSEMBLE", NULL);
+	}
+	return TCL_ERROR;
+    }
+
+    ensemblePtr = cmdPtr->objClientData;
+    *namespacePtrPtr = (Tcl_Namespace *) ensemblePtr->nsPtr;
+    return TCL_OK;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * Tcl_FindEnsemble --
+ *
+ *	Given a command name, get the ensemble token for it, allowing for
+ *	[namespace import]s. [Bug 1017022]
+ *
+ * Results:
+ *	The token for the ensemble command with the given name, or NULL if the
+ *	command either does not exist or is not an ensemble (when an error
+ *	message will be written into the interp if thats non-NULL).
+ *
+ * Side effects:
+ *	None
+ *
+ *----------------------------------------------------------------------
+ */
+
+Tcl_Command
+Tcl_FindEnsemble(
+    Tcl_Interp *interp,		/* Where to do the lookup, and where to write
+				 * the errors if TCL_LEAVE_ERR_MSG is set in
+				 * the flags. */
+    Tcl_Obj *cmdNameObj,	/* Name of command to look up. */
+    int flags)			/* Either 0 or TCL_LEAVE_ERR_MSG; other flags
+				 * are probably not useful. */
+{
+    Command *cmdPtr;
+
+    cmdPtr = (Command *)
+	    Tcl_FindCommand(interp, TclGetString(cmdNameObj), NULL, flags);
+    if (cmdPtr == NULL) {
+	return NULL;
+    }
+
+    if (cmdPtr->objProc != NsEnsembleImplementationCmd) {
+	/*
+	 * Reuse existing infrastructure for following import link chains
+	 * rather than duplicating it.
+	 */
+
+	cmdPtr = (Command *) TclGetOriginalCommand((Tcl_Command) cmdPtr);
+
+	if (cmdPtr == NULL || cmdPtr->objProc != NsEnsembleImplementationCmd){
+	    if (flags & TCL_LEAVE_ERR_MSG) {
+		Tcl_SetObjResult(interp, Tcl_ObjPrintf(
+			"\"%s\" is not an ensemble command",
+			TclGetString(cmdNameObj)));
+		Tcl_SetErrorCode(interp, "TCL", "LOOKUP", "ENSEMBLE",
+			TclGetString(cmdNameObj), NULL);
+	    }
+	    return NULL;
+	}
+    }
+
+    return (Tcl_Command) cmdPtr;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * Tcl_IsEnsemble --
+ *
+ *	Simple test for ensemble-hood that takes into account imported
+ *	ensemble commands as well.
+ *
+ * Results:
+ *	Boolean value
+ *
+ * Side effects:
+ *	None
+ *
+ *----------------------------------------------------------------------
+ */
+
+int
+Tcl_IsEnsemble(
+    Tcl_Command token)
+{
+    Command *cmdPtr = (Command *) token;
+
+    if (cmdPtr->objProc == NsEnsembleImplementationCmd) {
+	return 1;
+    }
+    cmdPtr = (Command *) TclGetOriginalCommand((Tcl_Command) cmdPtr);
+    if (cmdPtr == NULL || cmdPtr->objProc != NsEnsembleImplementationCmd) {
+	return 0;
+    }
+    return 1;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * TclMakeEnsemble --
+ *
+ *	Create an ensemble from a table of implementation commands. The
+ *	ensemble will be subject to (limited) compilation if any of the
+ *	implementation commands are compilable.
+ *
+ *	The 'name' parameter may be a single command name or a list if
+ *	creating an ensemble subcommand (see the binary implementation).
+ *
+ *	Currently, the TCL_ENSEMBLE_PREFIX ensemble flag is only used on
+ *	top-level ensemble commands.
+ *
+ * Results:
+ *	Handle for the new ensemble, or NULL on failure.
+ *
+ * Side effects:
+ *	May advance the bytecode compilation epoch.
+ *
+ *----------------------------------------------------------------------
+ */
+
+Tcl_Command
+TclMakeEnsemble(
+    Tcl_Interp *interp,
+    const char *name,		 /* The ensemble name (as explained above) */
+    const EnsembleImplMap map[]) /* The subcommands to create */
+{
+    Tcl_Command ensemble;
+    Tcl_Namespace *ns;
+    Tcl_DString buf, hiddenBuf;
+    const char **nameParts = NULL;
+    const char *cmdName = NULL;
+    int i, nameCount = 0, ensembleFlags = 0, hiddenLen;
+
+    /*
+     * Construct the path for the ensemble namespace and create it.
+     */
+
+    Tcl_DStringInit(&buf);
+    Tcl_DStringInit(&hiddenBuf);
+    TclDStringAppendLiteral(&hiddenBuf, "tcl:");
+    Tcl_DStringAppend(&hiddenBuf, name, -1);
+    TclDStringAppendLiteral(&hiddenBuf, ":");
+    hiddenLen = Tcl_DStringLength(&hiddenBuf);
+    if (name[0] == ':' && name[1] == ':') {
+	/*
+	 * An absolute name, so use it directly.
+	 */
+
+	cmdName = name;
+	Tcl_DStringAppend(&buf, name, -1);
+	ensembleFlags = TCL_ENSEMBLE_PREFIX;
+    } else {
+	/*
+	 * Not an absolute name, so do munging of it. Note that this treats a
+	 * multi-word list differently to a single word.
+	 */
+
+	TclDStringAppendLiteral(&buf, "::tcl");
+
+	if (Tcl_SplitList(NULL, name, &nameCount, &nameParts) != TCL_OK) {
+	    Tcl_Panic("invalid ensemble name '%s'", name);
+	}
+
+	for (i = 0; i < nameCount; ++i) {
+	    TclDStringAppendLiteral(&buf, "::");
+	    Tcl_DStringAppend(&buf, nameParts[i], -1);
+	}
+    }
+
+    ns = Tcl_FindNamespace(interp, Tcl_DStringValue(&buf), NULL,
+	    TCL_CREATE_NS_IF_UNKNOWN);
+    if (!ns) {
+	Tcl_Panic("unable to find or create %s namespace!",
+		Tcl_DStringValue(&buf));
+    }
+
+    /*
+     * Create the named ensemble in the correct namespace
+     */
+
+    if (cmdName == NULL) {
+	if (nameCount == 1) {
+	    ensembleFlags = TCL_ENSEMBLE_PREFIX;
+	    cmdName = Tcl_DStringValue(&buf) + 5;
+	} else {
+	    ns = ns->parentPtr;
+	    cmdName = nameParts[nameCount - 1];
+	}
+    }
+
+    /*
+     * Switch on compilation always for core ensembles now that we can do
+     * nice bytecode things with them.  Do it now.  Waiting until later will
+     * just cause pointless epoch bumps.
+     */
+
+    ensembleFlags |= ENSEMBLE_COMPILE;
+    ensemble = Tcl_CreateEnsemble(interp, cmdName, ns, ensembleFlags);
+
+    /*
+     * Create the ensemble mapping dictionary and the ensemble command procs.
+     */
+
+    if (ensemble != NULL) {
+	Tcl_Obj *mapDict, *fromObj, *toObj;
+	Command *cmdPtr;
+
+	TclDStringAppendLiteral(&buf, "::");
+	TclNewObj(mapDict);
+	for (i=0 ; map[i].name != NULL ; i++) {
+	    fromObj = Tcl_NewStringObj(map[i].name, -1);
+	    TclNewStringObj(toObj, Tcl_DStringValue(&buf),
+		    Tcl_DStringLength(&buf));
+	    Tcl_AppendToObj(toObj, map[i].name, -1);
+	    Tcl_DictObjPut(NULL, mapDict, fromObj, toObj);
+
+	    if (map[i].proc || map[i].nreProc) {
+		/*
+		 * If the command is unsafe, hide it when we're in a safe
+		 * interpreter. The code to do this is really hokey! It also
+		 * doesn't work properly yet; this function is always
+		 * currently called before the safe-interp flag is set so the
+		 * Tcl_IsSafe check fails.
+		 */
+
+		if (map[i].unsafe && Tcl_IsSafe(interp)) {
+		    cmdPtr = (Command *)
+			    Tcl_NRCreateCommand(interp, "___tmp", map[i].proc,
+			    map[i].nreProc, map[i].clientData, NULL);
+		    Tcl_DStringSetLength(&hiddenBuf, hiddenLen);
+		    if (Tcl_HideCommand(interp, "___tmp",
+			    Tcl_DStringAppend(&hiddenBuf, map[i].name, -1))) {
+			Tcl_Panic("%s", Tcl_GetString(Tcl_GetObjResult(interp)));
+		    }
+		} else {
+		    /*
+		     * Not hidden, so just create it. Yay!
+		     */
+
+		    cmdPtr = (Command *)
+			    Tcl_NRCreateCommand(interp, TclGetString(toObj),
+			    map[i].proc, map[i].nreProc, map[i].clientData,
+			    NULL);
+		}
+		cmdPtr->compileProc = map[i].compileProc;
+	    }
+	}
+	Tcl_SetEnsembleMappingDict(interp, ensemble, mapDict);
+    }
+
+    Tcl_DStringFree(&buf);
+    Tcl_DStringFree(&hiddenBuf);
+    if (nameParts != NULL) {
+	ckfree((char *) nameParts);
+    }
+    return ensemble;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * NsEnsembleImplementationCmd --
+ *
+ *	Implements an ensemble of commands (being those exported by a
+ *	namespace other than the global namespace) as a command with the same
+ *	(short) name as the namespace in the parent namespace.
+ *
+ * Results:
+ *	A standard Tcl result code. Will be TCL_ERROR if the command is not an
+ *	unambiguous prefix of any command exported by the ensemble's
+ *	namespace.
+ *
+ * Side effects:
+ *	Depends on the command within the namespace that gets executed. If the
+ *	ensemble itself returns TCL_ERROR, a descriptive error message will be
+ *	placed in the interpreter's result.
+ *
+ *----------------------------------------------------------------------
+ */
+
+static int
+NsEnsembleImplementationCmd(
+    ClientData clientData,
+    Tcl_Interp *interp,
+    int objc,
+    Tcl_Obj *const objv[])
+{
+    return Tcl_NRCallObjProc(interp, NsEnsembleImplementationCmdNR,
+	    clientData, objc, objv);
+}
+
+static int
+NsEnsembleImplementationCmdNR(
+    ClientData clientData,
+    Tcl_Interp *interp,
+    int objc,
+    Tcl_Obj *const objv[])
+{
+    EnsembleConfig *ensemblePtr = clientData;
+				/* The ensemble itself. */
+    Tcl_Obj *prefixObj;		/* An object containing the prefix words of
+				 * the command that implements the
+				 * subcommand. */
+    Tcl_HashEntry *hPtr;	/* Used for efficient lookup of fully
+				 * specified but not yet cached command
+				 * names. */
+    int reparseCount = 0;	/* Number of reparses. */
+    Tcl_Obj *errorObj;		/* Used for building error messages. */
+    Tcl_Obj *subObj;
+    int subIdx;
+
+    /*
+     * Must recheck objc, since numParameters might have changed. Cf. test
+     * namespace-53.9.
+     */
+
+  restartEnsembleParse:
+    subIdx = 1 + ensemblePtr->numParameters;
+    if (objc < subIdx + 1) {
+	/*
+	 * We don't have a subcommand argument. Make error message.
+	 */
+
+	Tcl_DString buf;	/* Message being built */
+
+	Tcl_DStringInit(&buf);
+	if (ensemblePtr->parameterList) {
+	    Tcl_DStringAppend(&buf,
+		    TclGetString(ensemblePtr->parameterList), -1);
+	    TclDStringAppendLiteral(&buf, " ");
+	}
+	TclDStringAppendLiteral(&buf, "subcommand ?arg ...?");
+	Tcl_WrongNumArgs(interp, 1, objv, Tcl_DStringValue(&buf));
+	Tcl_DStringFree(&buf);
+
+	return TCL_ERROR;
+    }
+
+    if (ensemblePtr->nsPtr->flags & NS_DYING) {
+	/*
+	 * Don't know how we got here, but make things give up quickly.
+	 */
+
+	if (!Tcl_InterpDeleted(interp)) {
+	    Tcl_SetObjResult(interp, Tcl_NewStringObj(
+		    "ensemble activated for deleted namespace", -1));
+	    Tcl_SetErrorCode(interp, "TCL", "ENSEMBLE", "DEAD", NULL);
+	}
+	return TCL_ERROR;
+    }
+
+    /*
+     * Determine if the table of subcommands is right. If so, we can just look
+     * up in there and go straight to dispatch.
+     */
+
+    subObj = objv[subIdx];
+
+    if (ensemblePtr->epoch == ensemblePtr->nsPtr->exportLookupEpoch) {
+	/*
+	 * Table of subcommands is still valid; therefore there might be a
+	 * valid cache of discovered information which we can reuse. Do the
+	 * check here, and if we're still valid, we can jump straight to the
+	 * part where we do the invocation of the subcommand.
+	 */
+
+	if (subObj->typePtr==&ensembleCmdType){
+	    EnsembleCmdRep *ensembleCmd = subObj->internalRep.twoPtrValue.ptr1;
+
+	    if (ensembleCmd->epoch == ensemblePtr->epoch &&
+		    ensembleCmd->token == (Command *)ensemblePtr->token) {
+		prefixObj = Tcl_GetHashValue(ensembleCmd->hPtr);
+		Tcl_IncrRefCount(prefixObj);
+		if (ensembleCmd->fix) {
+		    TclSpellFix(interp, objv, objc, subIdx, subObj, ensembleCmd->fix);
+		}
+		goto runResultingSubcommand;
+	    }
+	}
+    } else {
+	BuildEnsembleConfig(ensemblePtr);
+	ensemblePtr->epoch = ensemblePtr->nsPtr->exportLookupEpoch;
+    }
+
+    /*
+     * Look in the hashtable for the subcommand name; this is the fastest way
+     * of all if there is no cache in operation.
+     */
+
+    hPtr = Tcl_FindHashEntry(&ensemblePtr->subcommandTable,
+	    TclGetString(subObj));
+    if (hPtr != NULL) {
+
+	/*
+	 * Cache for later in the subcommand object.
+	 */
+
+	MakeCachedEnsembleCommand(subObj, ensemblePtr, hPtr, NULL);
+    } else if (!(ensemblePtr->flags & TCL_ENSEMBLE_PREFIX)) {
+	/*
+	 * Could not map, no prefixing, go to unknown/error handling.
+	 */
+
+	goto unknownOrAmbiguousSubcommand;
+    } else {
+	/*
+	 * If we've not already confirmed the command with the hash as part of
+	 * building our export table, we need to scan the sorted array for
+	 * matches.
+	 */
+
+	const char *subcmdName; /* Name of the subcommand, or unique prefix of
+				 * it (will be an error for a non-unique
+				 * prefix). */
+	char *fullName = NULL;	/* Full name of the subcommand. */
+	int stringLength, i;
+	int tableLength = ensemblePtr->subcommandTable.numEntries;
+	Tcl_Obj *fix;
+
+	subcmdName = Tcl_GetStringFromObj(subObj, &stringLength);
+	for (i=0 ; i<tableLength ; i++) {
+	    register int cmp = strncmp(subcmdName,
+		    ensemblePtr->subcommandArrayPtr[i],
+		    (unsigned) stringLength);
+
+	    if (cmp == 0) {
+		if (fullName != NULL) {
+		    /*
+		     * Since there's never the exact-match case to worry about
+		     * (hash search filters this), getting here indicates that
+		     * our subcommand is an ambiguous prefix of (at least) two
+		     * exported subcommands, which is an error case.
+		     */
+
+		    goto unknownOrAmbiguousSubcommand;
+		}
+		fullName = ensemblePtr->subcommandArrayPtr[i];
+	    } else if (cmp < 0) {
+		/*
+		 * Because we are searching a sorted table, we can now stop
+		 * searching because we have gone past anything that could
+		 * possibly match.
+		 */
+
+		break;
+	    }
+	}
+	if (fullName == NULL) {
+	    /*
+	     * The subcommand is not a prefix of anything, so bail out!
+	     */
+
+	    goto unknownOrAmbiguousSubcommand;
+	}
+	hPtr = Tcl_FindHashEntry(&ensemblePtr->subcommandTable, fullName);
+	if (hPtr == NULL) {
+	    Tcl_Panic("full name %s not found in supposedly synchronized hash",
+		    fullName);
+	}
+
+	/*
+	 * Record the spelling correction for usage message.
+	 */
+
+	fix = Tcl_NewStringObj(fullName, -1);
+
+	/*
+	 * Cache for later in the subcommand object.
+	 */
+
+	MakeCachedEnsembleCommand(subObj, ensemblePtr, hPtr, fix);
+	TclSpellFix(interp, objv, objc, subIdx, subObj, fix);
+    }
+
+    prefixObj = Tcl_GetHashValue(hPtr);
+    Tcl_IncrRefCount(prefixObj);
+  runResultingSubcommand:
+
+    /*
+     * Do the real work of execution of the subcommand by building an array of
+     * objects (note that this is potentially not the same length as the
+     * number of arguments to this ensemble command), populating it and then
+     * feeding it back through the main command-lookup engine. In theory, we
+     * could look up the command in the namespace ourselves, as we already
+     * have the namespace in which it is guaranteed to exist,
+     *
+     *   ((Q: That's not true if the -map option is used, is it?))
+     *
+     * but we don't do that (the cacheing of the command object used should
+     * help with that.)
+     */
+
+    {
+	Tcl_Obj *copyPtr;	/* The actual list of words to dispatch to.
+				 * Will be freed by the dispatch engine. */
+	Tcl_Obj **copyObjv;
+	int copyObjc, prefixObjc;
+
+	Tcl_ListObjLength(NULL, prefixObj, &prefixObjc);
+
+	if (objc == 2) {
+	    copyPtr = TclListObjCopy(NULL, prefixObj);
+	} else {
+	    copyPtr = Tcl_NewListObj(objc - 2 + prefixObjc, NULL);
+	    Tcl_ListObjAppendList(NULL, copyPtr, prefixObj);
+	    Tcl_ListObjReplace(NULL, copyPtr, LIST_MAX, 0,
+		    ensemblePtr->numParameters, objv + 1);
+	    Tcl_ListObjReplace(NULL, copyPtr, LIST_MAX, 0,
+		    objc - 2 - ensemblePtr->numParameters,
+		    objv + 2 + ensemblePtr->numParameters);
+	}
+	Tcl_IncrRefCount(copyPtr);
+	TclNRAddCallback(interp, TclNRReleaseValues, copyPtr, NULL, NULL, NULL);
+	TclDecrRefCount(prefixObj);
+
+	/*
+	 * Record what arguments the script sent in so that things like
+	 * Tcl_WrongNumArgs can give the correct error message. Parameters
+	 * count both as inserted and removed arguments.
+	 */
+
+	if (TclInitRewriteEnsemble(interp, 2 + ensemblePtr->numParameters,
+		prefixObjc + ensemblePtr->numParameters, objv)) {
+	    TclNRAddCallback(interp, TclClearRootEnsemble, NULL, NULL, NULL,
+		    NULL);
+	}
+
+	/*
+	 * Hand off to the target command.
+	 */
+
+	TclSkipTailcall(interp);
+	Tcl_ListObjGetElements(NULL, copyPtr, &copyObjc, &copyObjv);
+	((Interp *)interp)->lookupNsPtr = ensemblePtr->nsPtr;
+	return TclNREvalObjv(interp, copyObjc, copyObjv, TCL_EVAL_INVOKE, NULL);
+    }
+
+  unknownOrAmbiguousSubcommand:
+    /*
+     * Have not been able to match the subcommand asked for with a real
+     * subcommand that we export. See whether a handler has been registered
+     * for dealing with this situation. Will only call (at most) once for any
+     * particular ensemble invocation.
+     */
+
+    if (ensemblePtr->unknownHandler != NULL && reparseCount++ < 1) {
+	switch (EnsembleUnknownCallback(interp, ensemblePtr, objc, objv,
+		&prefixObj)) {
+	case TCL_OK:
+	    goto runResultingSubcommand;
+	case TCL_ERROR:
+	    return TCL_ERROR;
+	case TCL_CONTINUE:
+	    goto restartEnsembleParse;
+	}
+    }
+
+    /*
+     * We cannot determine what subcommand to hand off to, so generate a
+     * (standard) failure message. Note the one odd case compared with
+     * standard ensemble-like command, which is where a namespace has no
+     * exported commands at all...
+     */
+
+    Tcl_ResetResult(interp);
+    Tcl_SetErrorCode(interp, "TCL", "LOOKUP", "SUBCOMMAND",
+	    TclGetString(subObj), NULL);
+    if (ensemblePtr->subcommandTable.numEntries == 0) {
+	Tcl_SetObjResult(interp, Tcl_ObjPrintf(
+		"unknown subcommand \"%s\": namespace %s does not"
+		" export any commands", TclGetString(subObj),
+		ensemblePtr->nsPtr->fullName));
+	return TCL_ERROR;
+    }
+    errorObj = Tcl_ObjPrintf("unknown%s subcommand \"%s\": must be ",
+	    (ensemblePtr->flags & TCL_ENSEMBLE_PREFIX ? " or ambiguous" : ""),
+	    TclGetString(subObj));
+    if (ensemblePtr->subcommandTable.numEntries == 1) {
+	Tcl_AppendToObj(errorObj, ensemblePtr->subcommandArrayPtr[0], -1);
+    } else {
+	int i;
+
+	for (i=0 ; i<ensemblePtr->subcommandTable.numEntries-1 ; i++) {
+	    Tcl_AppendToObj(errorObj, ensemblePtr->subcommandArrayPtr[i], -1);
+	    Tcl_AppendToObj(errorObj, ", ", 2);
+	}
+	Tcl_AppendPrintfToObj(errorObj, "or %s",
+		ensemblePtr->subcommandArrayPtr[i]);
+    }
+    Tcl_SetObjResult(interp, errorObj);
+    return TCL_ERROR;
+}
+
+int
+TclClearRootEnsemble(
+    ClientData data[],
+    Tcl_Interp *interp,
+    int result)
+{
+    TclResetRewriteEnsemble(interp, 1);
+    return result;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * TclInitRewriteEnsemble --
+ *
+ *	Applies a rewrite of arguments so that an ensemble subcommand will
+ *	report error messages correctly for the overall command.
+ *
+ * Results:
+ *	Whether this is the first rewrite applied, a value which must be
+ *	passed to TclResetRewriteEnsemble when undoing this command's
+ *	behaviour.
+ *
+ * Side effects:
+ *	None.
+ *
+ *----------------------------------------------------------------------
+ */
+
+int
+TclInitRewriteEnsemble(
+    Tcl_Interp *interp,
+    int numRemoved,
+    int numInserted,
+    Tcl_Obj *const *objv)
+{
+    Interp *iPtr = (Interp *) interp;
+
+    int isRootEnsemble = (iPtr->ensembleRewrite.sourceObjs == NULL);
+
+    if (isRootEnsemble) {
+	iPtr->ensembleRewrite.sourceObjs = objv;
+	iPtr->ensembleRewrite.numRemovedObjs = numRemoved;
+	iPtr->ensembleRewrite.numInsertedObjs = numInserted;
+    } else {
+	int numIns = iPtr->ensembleRewrite.numInsertedObjs;
+
+	if (numIns < numRemoved) {
+	    iPtr->ensembleRewrite.numRemovedObjs += numRemoved - numIns;
+	    iPtr->ensembleRewrite.numInsertedObjs = numInserted;
+	} else {
+	    iPtr->ensembleRewrite.numInsertedObjs += numInserted - numRemoved;
+	}
+    }
+    return isRootEnsemble;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * TclResetRewriteEnsemble --
+ *
+ *	Removes any rewrites applied to support proper reporting of error
+ *	messages used in ensembles. Should be paired with
+ *	TclInitRewriteEnsemble.
+ *
+ * Results:
+ *	None.
+ *
+ * Side effects:
+ *	None.
+ *
+ *----------------------------------------------------------------------
+ */
+
+void
+TclResetRewriteEnsemble(
+    Tcl_Interp *interp,
+    int isRootEnsemble)
+{
+    Interp *iPtr = (Interp *) interp;
+
+    if (isRootEnsemble) {
+	iPtr->ensembleRewrite.sourceObjs = NULL;
+	iPtr->ensembleRewrite.numRemovedObjs = 0;
+	iPtr->ensembleRewrite.numInsertedObjs = 0;
+    }
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * TclSpellFix --
+ *
+ *	Record a spelling correction that needs making in the
+ *	generation of the WrongNumArgs usage message.
+ *
+ * Results:
+ *	None.
+ *
+ * Side effects:
+ *	Can create an alternative ensemble rewrite structure.
+ *
+ *----------------------------------------------------------------------
+ */
+
+static int
+FreeER(
+    ClientData data[],
+    Tcl_Interp *interp,
+    int result)
+{
+    Tcl_Obj **tmp = (Tcl_Obj **)data[0];
+
+    ckfree(tmp[2]);
+    ckfree(tmp);
+    return result;
+}
+
+void
+TclSpellFix(
+    Tcl_Interp *interp,
+    Tcl_Obj *const *objv,
+    int objc,
+    int badIdx,
+    Tcl_Obj *bad,
+    Tcl_Obj *fix)
+{
+    Interp *iPtr = (Interp *) interp;
+    Tcl_Obj *const *search;
+    Tcl_Obj **store;
+    int idx;
+    int size;
+
+    if (iPtr->ensembleRewrite.sourceObjs == NULL) {
+	iPtr->ensembleRewrite.sourceObjs = objv;
+	iPtr->ensembleRewrite.numRemovedObjs = 0;
+	iPtr->ensembleRewrite.numInsertedObjs = 0;
+    }
+
+    /* Compute the valid length of the ensemble root */
+
+    size = iPtr->ensembleRewrite.numRemovedObjs + objc
+		- iPtr->ensembleRewrite.numInsertedObjs;
+
+    search = iPtr->ensembleRewrite.sourceObjs;
+    if (search[0] == NULL) {
+	/* Awful casting abuse here */
+	search = (Tcl_Obj *const *) search[1];
+    }
+
+    if (badIdx < iPtr->ensembleRewrite.numInsertedObjs) {
+	/*
+	 * Misspelled value was inserted. We cannot directly jump
+	 * to the bad value, but have to search.
+	 */
+	idx = 1;
+	while (idx < size) {
+	    if (search[idx] == bad) {
+		break;
+	    }
+	    idx++;
+	}
+	if (idx == size) {
+	    return;
+	}
+    } else {
+	/* Jump to the misspelled value. */
+	idx = iPtr->ensembleRewrite.numRemovedObjs + badIdx
+		- iPtr->ensembleRewrite.numInsertedObjs;
+
+	/* Verify */
+	if (search[idx] != bad) {
+	    Tcl_Panic("SpellFix: programming error");
+	}
+    }
+
+    search = iPtr->ensembleRewrite.sourceObjs;
+    if (search[0] == NULL) {
+	store = (Tcl_Obj **)search[2];
+    }  else {
+	Tcl_Obj **tmp = ckalloc(3 * sizeof(Tcl_Obj *));
+	tmp[0] = NULL;
+	tmp[1] = (Tcl_Obj *)iPtr->ensembleRewrite.sourceObjs;
+	tmp[2] = (Tcl_Obj *)ckalloc(size * sizeof(Tcl_Obj *));
+	memcpy(tmp[2], tmp[1], size*sizeof(Tcl_Obj *));
+
+	iPtr->ensembleRewrite.sourceObjs = (Tcl_Obj *const *) tmp;
+	TclNRAddCallback(interp, FreeER, tmp, NULL, NULL, NULL);
+	store = (Tcl_Obj **)tmp[2];
+    }
+
+    store[idx] = fix;
+    Tcl_IncrRefCount(fix);
+    TclNRAddCallback(interp, TclNRReleaseValues, fix, NULL, NULL, NULL);
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * TclFetchEnsembleRoot --
+ *
+ *	Returns the root of ensemble rewriting, if any.
+ *	If no root exists, returns objv instead.
+ *
+ * Results:
+ *	None.
+ *
+ * Side effects:
+ *	None.
+ *
+ *----------------------------------------------------------------------
+ */
+
+Tcl_Obj *const *
+TclFetchEnsembleRoot(
+    Tcl_Interp *interp,
+    Tcl_Obj *const *objv,
+    int objc,
+    int *objcPtr)
+{
+    Interp *iPtr = (Interp *) interp;
+
+    if (iPtr->ensembleRewrite.sourceObjs) {
+	*objcPtr = objc + iPtr->ensembleRewrite.numRemovedObjs
+		- iPtr->ensembleRewrite.numInsertedObjs;
+	return iPtr->ensembleRewrite.sourceObjs;
+    }
+    *objcPtr = objc;
+    return objv;
+}
+
+/*
+ * ----------------------------------------------------------------------
+ *
+ * EnsmebleUnknownCallback --
+ *
+ *	Helper for the ensemble engine that handles the procesing of unknown
+ *	callbacks. See the user documentation of the ensemble unknown handler
+ *	for details; this function is only ever called when such a function is
+ *	defined, and is only ever called once per ensemble dispatch (i.e. if a
+ *	reparse still fails, this isn't called again).
+ *
+ * Results:
+ *	TCL_OK -	*prefixObjPtr contains the command words to dispatch
+ *			to.
+ *	TCL_CONTINUE -	Need to reparse (*prefixObjPtr is invalid).
+ *	TCL_ERROR -	Something went wrong! Error message in interpreter.
+ *
+ * Side effects:
+ *	Calls the Tcl interpreter, so arbitrary.
+ *
+ * ----------------------------------------------------------------------
+ */
+
+static inline int
+EnsembleUnknownCallback(
+    Tcl_Interp *interp,
+    EnsembleConfig *ensemblePtr,
+    int objc,
+    Tcl_Obj *const objv[],
+    Tcl_Obj **prefixObjPtr)
+{
+    int paramc, i, result, prefixObjc;
+    Tcl_Obj **paramv, *unknownCmd, *ensObj;
+
+    /*
+     * Create the unknown command callback to determine what to do.
+     */
+
+    unknownCmd = Tcl_DuplicateObj(ensemblePtr->unknownHandler);
+    TclNewObj(ensObj);
+    Tcl_GetCommandFullName(interp, ensemblePtr->token, ensObj);
+    Tcl_ListObjAppendElement(NULL, unknownCmd, ensObj);
+    for (i=1 ; i<objc ; i++) {
+	Tcl_ListObjAppendElement(NULL, unknownCmd, objv[i]);
+    }
+    TclListObjGetElements(NULL, unknownCmd, &paramc, &paramv);
+    Tcl_IncrRefCount(unknownCmd);
+
+    /*
+     * Now call the unknown handler. (We don't bother NRE-enabling this; deep
+     * recursing through unknown handlers is horribly perverse.) Note that it
+     * is always an error for an unknown handler to delete its ensemble; don't
+     * do that!
+     */
+
+    Tcl_Preserve(ensemblePtr);
+    TclSkipTailcall(interp);
+    result = Tcl_EvalObjv(interp, paramc, paramv, 0);
+    if ((result == TCL_OK) && (ensemblePtr->flags & ENSEMBLE_DEAD)) {
+	if (!Tcl_InterpDeleted(interp)) {
+	    Tcl_SetObjResult(interp, Tcl_NewStringObj(
+		    "unknown subcommand handler deleted its ensemble", -1));
+	    Tcl_SetErrorCode(interp, "TCL", "ENSEMBLE", "UNKNOWN_DELETED",
+		    NULL);
+	}
+	result = TCL_ERROR;
+    }
+    Tcl_Release(ensemblePtr);
+
+    /*
+     * If we succeeded, we should either have a list of words that form the
+     * command to be executed, or an empty list. In the empty-list case, the
+     * ensemble is believed to be updated so we should ask the ensemble engine
+     * to reparse the original command.
+     */
+
+    if (result == TCL_OK) {
+	*prefixObjPtr = Tcl_GetObjResult(interp);
+	Tcl_IncrRefCount(*prefixObjPtr);
+	TclDecrRefCount(unknownCmd);
+	Tcl_ResetResult(interp);
+
+	/*
+	 * Namespace is still there. Check if the result is a valid list. If
+	 * it is, and it is non-empty, that list is what we are using as our
+	 * replacement.
+	 */
+
+	if (TclListObjLength(interp, *prefixObjPtr, &prefixObjc) != TCL_OK) {
+	    TclDecrRefCount(*prefixObjPtr);
+	    Tcl_AddErrorInfo(interp, "\n    while parsing result of "
+		    "ensemble unknown subcommand handler");
+	    return TCL_ERROR;
+	}
+	if (prefixObjc > 0) {
+	    return TCL_OK;
+	}
+
+	/*
+	 * Namespace alive & empty result => reparse.
+	 */
+
+	TclDecrRefCount(*prefixObjPtr);
+	return TCL_CONTINUE;
+    }
+
+    /*
+     * Oh no! An exceptional result. Convert to an error.
+     */
+
+    if (!Tcl_InterpDeleted(interp)) {
+	if (result != TCL_ERROR) {
+	    Tcl_ResetResult(interp);
+	    Tcl_SetObjResult(interp, Tcl_NewStringObj(
+		    "unknown subcommand handler returned bad code: ", -1));
+	    switch (result) {
+	    case TCL_RETURN:
+		Tcl_AppendToObj(Tcl_GetObjResult(interp), "return", -1);
+		break;
+	    case TCL_BREAK:
+		Tcl_AppendToObj(Tcl_GetObjResult(interp), "break", -1);
+		break;
+	    case TCL_CONTINUE:
+		Tcl_AppendToObj(Tcl_GetObjResult(interp), "continue", -1);
+		break;
+	    default:
+		Tcl_AppendPrintfToObj(Tcl_GetObjResult(interp), "%d", result);
+	    }
+	    Tcl_AddErrorInfo(interp, "\n    result of "
+		    "ensemble unknown subcommand handler: ");
+	    Tcl_AppendObjToErrorInfo(interp, unknownCmd);
+	    Tcl_SetErrorCode(interp, "TCL", "ENSEMBLE", "UNKNOWN_RESULT",
+		    NULL);
+	} else {
+	    Tcl_AddErrorInfo(interp,
+		    "\n    (ensemble unknown subcommand handler)");
+	}
+    }
+    TclDecrRefCount(unknownCmd);
+    return TCL_ERROR;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * MakeCachedEnsembleCommand --
+ *
+ *	Cache what we've computed so far; it's not nice to repeatedly copy
+ *	strings about. Note that to do this, we start by deleting any old
+ *	representation that there was (though if it was an out of date
+ *	ensemble rep, we can skip some of the deallocation process.)
+ *
+ * Results:
+ *	None
+ *
+ * Side effects:
+ *	Alters the internal representation of the first object parameter.
+ *
+ *----------------------------------------------------------------------
+ */
+
+static void
+MakeCachedEnsembleCommand(
+    Tcl_Obj *objPtr,
+    EnsembleConfig *ensemblePtr,
+    Tcl_HashEntry *hPtr,
+    Tcl_Obj *fix)
+{
+    register EnsembleCmdRep *ensembleCmd;
+
+    if (objPtr->typePtr == &ensembleCmdType) {
+	ensembleCmd = objPtr->internalRep.twoPtrValue.ptr1;
+	TclCleanupCommandMacro(ensembleCmd->token);
+	if (ensembleCmd->fix) {
+	    Tcl_DecrRefCount(ensembleCmd->fix);
+	}
+    } else {
+	/*
+	 * Kill the old internal rep, and replace it with a brand new one of
+	 * our own.
+	 */
+
+	TclFreeIntRep(objPtr);
+	ensembleCmd = ckalloc(sizeof(EnsembleCmdRep));
+	objPtr->internalRep.twoPtrValue.ptr1 = ensembleCmd;
+	objPtr->typePtr = &ensembleCmdType;
+    }
+
+    /*
+     * Populate the internal rep.
+     */
+
+    ensembleCmd->epoch = ensemblePtr->epoch;
+    ensembleCmd->token = (Command *) ensemblePtr->token;
+    ensembleCmd->token->refCount++;
+    if (fix) {
+	Tcl_IncrRefCount(fix);
+    }
+    ensembleCmd->fix = fix;
+    ensembleCmd->hPtr = hPtr;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * DeleteEnsembleConfig --
+ *
+ *	Destroys the data structure used to represent an ensemble. This is
+ *	called when the ensemble's command is deleted (which happens
+ *	automatically if the ensemble's namespace is deleted.) Maintainers
+ *	should note that ensembles should be deleted by deleting their
+ *	commands.
+ *
+ * Results:
+ *	None.
+ *
+ * Side effects:
+ *	Memory is (eventually) deallocated.
+ *
+ *----------------------------------------------------------------------
+ */
+
+static void
+ClearTable(
+    EnsembleConfig *ensemblePtr)
+{
+    Tcl_HashTable *hash = &ensemblePtr->subcommandTable;
+
+    if (hash->numEntries != 0) {
+        Tcl_HashSearch search;
+        Tcl_HashEntry *hPtr = Tcl_FirstHashEntry(hash, &search);
+
+        while (hPtr != NULL) {
+            Tcl_Obj *prefixObj = Tcl_GetHashValue(hPtr);
+            Tcl_DecrRefCount(prefixObj);
+            hPtr = Tcl_NextHashEntry(&search);
+        }
+        ckfree((char *) ensemblePtr->subcommandArrayPtr);
+    }
+    Tcl_DeleteHashTable(hash);
+}
+
+static void
+DeleteEnsembleConfig(
+    ClientData clientData)
+{
+    EnsembleConfig *ensemblePtr = clientData;
+    Namespace *nsPtr = ensemblePtr->nsPtr;
+
+    /*
+     * Unlink from the ensemble chain if it has not been marked as having been
+     * done already.
+     */
+
+    if (ensemblePtr->next != ensemblePtr) {
+	EnsembleConfig *ensPtr = (EnsembleConfig *) nsPtr->ensembles;
+
+	if (ensPtr == ensemblePtr) {
+	    nsPtr->ensembles = (Tcl_Ensemble *) ensemblePtr->next;
+	} else {
+	    while (ensPtr != NULL) {
+		if (ensPtr->next == ensemblePtr) {
+		    ensPtr->next = ensemblePtr->next;
+		    break;
+		}
+		ensPtr = ensPtr->next;
+	    }
+	}
+    }
+
+    /*
+     * Mark the namespace as dead so code that uses Tcl_Preserve() can tell
+     * whether disaster happened anyway.
+     */
+
+    ensemblePtr->flags |= ENSEMBLE_DEAD;
+
+    /*
+     * Kill the pointer-containing fields.
+     */
+
+    ClearTable(ensemblePtr);
+    if (ensemblePtr->subcmdList != NULL) {
+	Tcl_DecrRefCount(ensemblePtr->subcmdList);
+    }
+    if (ensemblePtr->parameterList != NULL) {
+	Tcl_DecrRefCount(ensemblePtr->parameterList);
+    }
+    if (ensemblePtr->subcommandDict != NULL) {
+	Tcl_DecrRefCount(ensemblePtr->subcommandDict);
+    }
+    if (ensemblePtr->unknownHandler != NULL) {
+	Tcl_DecrRefCount(ensemblePtr->unknownHandler);
+    }
+
+    /*
+     * Arrange for the structure to be reclaimed. Note that this is complex
+     * because we have to make sure that we can react sensibly when an
+     * ensemble is deleted during the process of initialising the ensemble
+     * (especially the unknown callback.)
+     */
+
+    Tcl_EventuallyFree(ensemblePtr, TCL_DYNAMIC);
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * BuildEnsembleConfig --
+ *
+ *	Create the internal data structures that describe how an ensemble
+ *	looks, being a hash mapping from the simple command name to the Tcl list
+ *	that describes the implementation prefix words, and a sorted array of
+ *	the names to allow for reasonably efficient unambiguous prefix handling.
+ *
+ * Results:
+ *	None.
+ *
+ * Side effects:
+ *	Reallocates and rebuilds the hash table and array stored at the
+ *	ensemblePtr argument. For large ensembles or large namespaces, this is
+ *	a potentially expensive operation.
+ *
+ *----------------------------------------------------------------------
+ */
+
+static void
+BuildEnsembleConfig(
+    EnsembleConfig *ensemblePtr)
+{
+    Tcl_HashSearch search;	/* Used for scanning the set of commands in
+				 * the namespace that backs up this
+				 * ensemble. */
+    int i, j, isNew;
+    Tcl_HashTable *hash = &ensemblePtr->subcommandTable;
+    Tcl_HashEntry *hPtr;
+    Tcl_Obj *mapDict = ensemblePtr->subcommandDict;
+    Tcl_Obj *subList = ensemblePtr->subcmdList;
+
+    ClearTable(ensemblePtr);
+    Tcl_InitHashTable(hash, TCL_STRING_KEYS);
+
+    if (subList) {
+        int subc;
+        Tcl_Obj **subv, *target, *cmdObj, *cmdPrefixObj;
+        char *name;
+
+        /*
+         * There is a list of exactly what subcommands go in the table.
+         * Must determine the target for each.
+         */
+
+        Tcl_ListObjGetElements(NULL, subList, &subc, &subv);
+        if (subList == mapDict) {
+            /*
+             * Strange case where explicit list of subcommands is same value
+             * as the dict mapping to targets.
+             */
+
+            for (i = 0; i < subc; i += 2) {
+                name = TclGetString(subv[i]);
+                hPtr = Tcl_CreateHashEntry(hash, name, &isNew);
+                if (!isNew) {
+                    cmdObj = (Tcl_Obj *)Tcl_GetHashValue(hPtr);
+                    Tcl_DecrRefCount(cmdObj);
+                }
+                Tcl_SetHashValue(hPtr, subv[i+1]);
+                Tcl_IncrRefCount(subv[i+1]);
+
+                name = TclGetString(subv[i+1]);
+                hPtr = Tcl_CreateHashEntry(hash, name, &isNew);
+                if (isNew) {
+                    cmdObj = Tcl_NewStringObj(name, -1);
+                    cmdPrefixObj = Tcl_NewListObj(1, &cmdObj);
+                    Tcl_SetHashValue(hPtr, cmdPrefixObj);
+                    Tcl_IncrRefCount(cmdPrefixObj);
+                }
+            }
+        } else {
+            /* Usual case where we can freely act on the list and dict. */
+
+            for (i = 0; i < subc; i++) {
+                name = TclGetString(subv[i]);
+                hPtr = Tcl_CreateHashEntry(hash, name, &isNew);
+                if (!isNew) {
+                    continue;
+                }
+
+                /* Lookup target in the dictionary */
+                if (mapDict) {
+                    Tcl_DictObjGet(NULL, mapDict, subv[i], &target);
+                    if (target) {
+                        Tcl_SetHashValue(hPtr, target);
+                        Tcl_IncrRefCount(target);
+                        continue;
+                    }
+                }
+
+                /*
+                 * target was not in the dictionary so map onto the namespace.
+                 * Note in this case that we do not guarantee that the
+                 * command is actually there; that is the programmer's
+                 * responsibility (or [::unknown] of course).
+                 */
+                cmdObj = Tcl_NewStringObj(name, -1);
+                cmdPrefixObj = Tcl_NewListObj(1, &cmdObj);
+                Tcl_SetHashValue(hPtr, cmdPrefixObj);
+                Tcl_IncrRefCount(cmdPrefixObj);
+            }
+        }
+    } else if (mapDict) {
+        /*
+         * No subcmd list, but we do have a mapping dictionary so we should
+         * use the keys of that. Convert the dictionary's contents into the
+         * form required for the ensemble's internal hashtable.
+         */
+
+        Tcl_DictSearch dictSearch;
+        Tcl_Obj *keyObj, *valueObj;
+        int done;
+
+        Tcl_DictObjFirst(NULL, ensemblePtr->subcommandDict, &dictSearch,
+                &keyObj, &valueObj, &done);
+        while (!done) {
+            char *name = TclGetString(keyObj);
+
+            hPtr = Tcl_CreateHashEntry(hash, name, &isNew);
+            Tcl_SetHashValue(hPtr, valueObj);
+            Tcl_IncrRefCount(valueObj);
+            Tcl_DictObjNext(&dictSearch, &keyObj, &valueObj, &done);
+        }
+    } else {
+	/*
+	 * Discover what commands are actually exported by the namespace.
+	 * What we have is an array of patterns and a hash table whose keys
+	 * are the command names exported by the namespace (the contents do
+	 * not matter here.) We must find out what commands are actually
+	 * exported by filtering each command in the namespace against each of
+	 * the patterns in the export list. Note that we use an intermediate
+	 * hash table to make memory management easier, and because that makes
+	 * exact matching far easier too.
+	 *
+	 * Suggestion for future enhancement: compute the unique prefixes and
+	 * place them in the hash too, which should make for even faster
+	 * matching.
+	 */
+
+	hPtr = Tcl_FirstHashEntry(&ensemblePtr->nsPtr->cmdTable, &search);
+	for (; hPtr!= NULL ; hPtr=Tcl_NextHashEntry(&search)) {
+	    char *nsCmdName =		/* Name of command in namespace. */
+		    Tcl_GetHashKey(&ensemblePtr->nsPtr->cmdTable, hPtr);
+
+	    for (i=0 ; i<ensemblePtr->nsPtr->numExportPatterns ; i++) {
+		if (Tcl_StringMatch(nsCmdName,
+			ensemblePtr->nsPtr->exportArrayPtr[i])) {
+		    hPtr = Tcl_CreateHashEntry(hash, nsCmdName, &isNew);
+
+		    /*
+		     * Remember, hash entries have a full reference to the
+		     * substituted part of the command (as a list) as their
+		     * content!
+		     */
+
+		    if (isNew) {
+			Tcl_Obj *cmdObj, *cmdPrefixObj;
+
+			cmdObj = Tcl_NewStringObj(nsCmdName, -1);
+			cmdPrefixObj = Tcl_NewListObj(1, &cmdObj);
+			Tcl_SetHashValue(hPtr, cmdPrefixObj);
+			Tcl_IncrRefCount(cmdPrefixObj);
+		    }
+		    break;
+		}
+	    }
+	}
+    }
+
+    if (hash->numEntries == 0) {
+	ensemblePtr->subcommandArrayPtr = NULL;
+	return;
+    }
+
+    /*
+     * Create a sorted array of all subcommands in the ensemble; hash tables
+     * are all very well for a quick look for an exact match, but they can't
+     * determine things like whether a string is a prefix of another (not
+     * without lots of preparation anyway) and they're no good for when we're
+     * generating the error message either.
+     *
+     * We do this by filling an array with the names (we use the hash keys
+     * directly to save a copy, since any time we change the array we change
+     * the hash too, and vice versa) and running quicksort over the array.
+     */
+
+    ensemblePtr->subcommandArrayPtr =
+	    ckalloc(sizeof(char *) * hash->numEntries);
+
+    /*
+     * Fill array from both ends as this makes us less likely to end up with
+     * performance problems in qsort(), which is good. Note that doing this
+     * makes this code much more opaque, but the naive alternatve:
+     *
+     * for (hPtr=Tcl_FirstHashEntry(hash,&search),i=0 ;
+     *	       hPtr!=NULL ; hPtr=Tcl_NextHashEntry(&search),i++) {
+     *     ensemblePtr->subcommandArrayPtr[i] = Tcl_GetHashKey(hash, &hPtr);
+     * }
+     *
+     * can produce long runs of precisely ordered table entries when the
+     * commands in the namespace are declared in a sorted fashion (an ordering
+     * some people like) and the hashing functions (or the command names
+     * themselves) are fairly unfortunate. By filling from both ends, it
+     * requires active malice (and probably a debugger) to get qsort() to have
+     * awful runtime behaviour.
+     */
+
+    i = 0;
+    j = hash->numEntries;
+    hPtr = Tcl_FirstHashEntry(hash, &search);
+    while (hPtr != NULL) {
+	ensemblePtr->subcommandArrayPtr[i++] = Tcl_GetHashKey(hash, hPtr);
+	hPtr = Tcl_NextHashEntry(&search);
+	if (hPtr == NULL) {
+	    break;
+	}
+	ensemblePtr->subcommandArrayPtr[--j] = Tcl_GetHashKey(hash, hPtr);
+	hPtr = Tcl_NextHashEntry(&search);
+    }
+    if (hash->numEntries > 1) {
+	qsort(ensemblePtr->subcommandArrayPtr, (unsigned) hash->numEntries,
+		sizeof(char *), NsEnsembleStringOrder);
+    }
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * NsEnsembleStringOrder --
+ *
+ *	Helper function to compare two pointers to two strings for use with
+ *	qsort().
+ *
+ * Results:
+ *	-1 if the first string is smaller, 1 if the second string is smaller,
+ *	and 0 if they are equal.
+ *
+ * Side effects:
+ *	None.
+ *
+ *----------------------------------------------------------------------
+ */
+
+static int
+NsEnsembleStringOrder(
+    const void *strPtr1,
+    const void *strPtr2)
+{
+    return strcmp(*(const char **)strPtr1, *(const char **)strPtr2);
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * FreeEnsembleCmdRep --
+ *
+ *	Destroys the internal representation of a Tcl_Obj that has been
+ *	holding information about a command in an ensemble.
+ *
+ * Results:
+ *	None.
+ *
+ * Side effects:
+ *	Memory is deallocated. If this held the last reference to a
+ *	namespace's main structure, that main structure will also be
+ *	destroyed.
+ *
+ *----------------------------------------------------------------------
+ */
+
+static void
+FreeEnsembleCmdRep(
+    Tcl_Obj *objPtr)
+{
+    EnsembleCmdRep *ensembleCmd = objPtr->internalRep.twoPtrValue.ptr1;
+
+    TclCleanupCommandMacro(ensembleCmd->token);
+    if (ensembleCmd->fix) {
+	Tcl_DecrRefCount(ensembleCmd->fix);
+    }
+    ckfree(ensembleCmd);
+    objPtr->typePtr = NULL;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * DupEnsembleCmdRep --
+ *
+ *	Makes one Tcl_Obj into a copy of another that is a subcommand of an
+ *	ensemble.
+ *
+ * Results:
+ *	None.
+ *
+ * Side effects:
+ *	Memory is allocated, and the namespace that the ensemble is built on
+ *	top of gains another reference.
+ *
+ *----------------------------------------------------------------------
+ */
+
+static void
+DupEnsembleCmdRep(
+    Tcl_Obj *objPtr,
+    Tcl_Obj *copyPtr)
+{
+    EnsembleCmdRep *ensembleCmd = objPtr->internalRep.twoPtrValue.ptr1;
+    EnsembleCmdRep *ensembleCopy = ckalloc(sizeof(EnsembleCmdRep));
+
+    copyPtr->typePtr = &ensembleCmdType;
+    copyPtr->internalRep.twoPtrValue.ptr1 = ensembleCopy;
+    ensembleCopy->epoch = ensembleCmd->epoch;
+    ensembleCopy->token = ensembleCmd->token;
+    ensembleCopy->token->refCount++;
+    ensembleCopy->fix = ensembleCmd->fix;
+    if (ensembleCopy->fix) {
+	Tcl_IncrRefCount(ensembleCopy->fix);
+    }
+    ensembleCopy->hPtr = ensembleCmd->hPtr;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * TclCompileEnsemble --
+ *
+ *	Procedure called to compile an ensemble command. Note that most
+ *	ensembles are not compiled, since modifying a compiled ensemble causes
+ *	a invalidation of all existing bytecode (expensive!) which is not
+ *	normally warranted.
+ *
+ * Results:
+ *	Returns TCL_OK for a successful compile. Returns TCL_ERROR to defer
+ *	evaluation to runtime.
+ *
+ * Side effects:
+ *	Instructions are added to envPtr to execute the subcommands of the
+ *	ensemble at runtime if a compile-time mapping is possible.
+ *
+ *----------------------------------------------------------------------
+ */
+
+int
+TclCompileEnsemble(
+    Tcl_Interp *interp,		/* Used for error reporting. */
+    Tcl_Parse *parsePtr,	/* Points to a parse structure for the command
+				 * created by Tcl_ParseCommand. */
+    Command *cmdPtr,		/* Points to defintion of command being
+				 * compiled. */
+    CompileEnv *envPtr)		/* Holds resulting instructions. */
+{
+    Tcl_Token *tokenPtr = TokenAfter(parsePtr->tokenPtr);
+    Tcl_Obj *mapObj, *subcmdObj, *targetCmdObj, *listObj, **elems;
+    Tcl_Obj *replaced = Tcl_NewObj(), *replacement;
+    Tcl_Command ensemble = (Tcl_Command) cmdPtr;
+    Command *oldCmdPtr = cmdPtr, *newCmdPtr;
+    int len, result, flags = 0, i, depth = 1, invokeAnyway = 0;
+    int ourResult = TCL_ERROR;
+    unsigned numBytes;
+    const char *word;
+    DefineLineInformation;
+
+    Tcl_IncrRefCount(replaced);
+    if (parsePtr->numWords < depth + 1) {
+	goto failed;
+    }
+    if (tokenPtr->type != TCL_TOKEN_SIMPLE_WORD) {
+	/*
+	 * Too hard.
+	 */
+
+	goto failed;
+    }
+
+    /*
+     * This is where we return to if we are parsing multiple nested compiled
+     * ensembles. [info object] is such a beast.
+     */
+
+  checkNextWord:
+    word = tokenPtr[1].start;
+    numBytes = tokenPtr[1].size;
+
+    /*
+     * There's a sporting chance we'll be able to compile this. But now we
+     * must check properly. To do that, check that we're compiling an ensemble
+     * that has a compilable command as its appropriate subcommand.
+     */
+
+    if (Tcl_GetEnsembleMappingDict(NULL, ensemble, &mapObj) != TCL_OK
+	    || mapObj == NULL) {
+	/*
+	 * Either not an ensemble or a mapping isn't installed. Crud. Too hard
+	 * to proceed.
+	 */
+
+	goto failed;
+    }
+
+    /*
+     * Also refuse to compile anything that uses a formal parameter list for
+     * now, on the grounds that it is too complex.
+     */
+
+    if (Tcl_GetEnsembleParameterList(NULL, ensemble, &listObj) != TCL_OK
+	    || listObj != NULL) {
+	/*
+	 * Figuring out how to compile this has become too much. Bail out.
+	 */
+
+	goto failed;
+    }
+
+    /*
+     * Next, get the flags. We need them on several code paths so that we can
+     * know whether we're to do prefix matching.
+     */
+
+    (void) Tcl_GetEnsembleFlags(NULL, ensemble, &flags);
+
+    /*
+     * Check to see if there's also a subcommand list; must check to see if
+     * the subcommand we are calling is in that list if it exists, since that
+     * list filters the entries in the map.
+     */
+
+    (void) Tcl_GetEnsembleSubcommandList(NULL, ensemble, &listObj);
+    if (listObj != NULL) {
+	int sclen;
+	const char *str;
+	Tcl_Obj *matchObj = NULL;
+
+	if (Tcl_ListObjGetElements(NULL, listObj, &len, &elems) != TCL_OK) {
+	    goto failed;
+	}
+	for (i=0 ; i<len ; i++) {
+	    str = Tcl_GetStringFromObj(elems[i], &sclen);
+	    if ((sclen == (int) numBytes) && !memcmp(word, str, numBytes)) {
+		/*
+		 * Exact match! Excellent!
+		 */
+
+		result = Tcl_DictObjGet(NULL, mapObj,elems[i], &targetCmdObj);
+		if (result != TCL_OK || targetCmdObj == NULL) {
+		    goto failed;
+		}
+		replacement = elems[i];
+		goto doneMapLookup;
+	    }
+
+	    /*
+	     * Check to see if we've got a prefix match. A single prefix match
+	     * is fine, and allows us to refine our dictionary lookup, but
+	     * multiple prefix matches is a Bad Thing and will prevent us from
+	     * making progress. Note that we cannot do the lookup immediately
+	     * in the prefix case; might be another entry later in the list
+	     * that causes things to fail.
+	     */
+
+	    if ((flags & TCL_ENSEMBLE_PREFIX)
+		    && strncmp(word, str, numBytes) == 0) {
+		if (matchObj != NULL) {
+		    goto failed;
+		}
+		matchObj = elems[i];
+	    }
+	}
+	if (matchObj == NULL) {
+	    goto failed;
+	}
+	result = Tcl_DictObjGet(NULL, mapObj, matchObj, &targetCmdObj);
+	if (result != TCL_OK || targetCmdObj == NULL) {
+	    goto failed;
+	}
+	replacement = matchObj;
+    } else {
+	Tcl_DictSearch s;
+	int done, matched;
+	Tcl_Obj *tmpObj;
+
+	/*
+	 * No map, so check the dictionary directly.
+	 */
+
+	TclNewStringObj(subcmdObj, word, (int) numBytes);
+	result = Tcl_DictObjGet(NULL, mapObj, subcmdObj, &targetCmdObj);
+	if (result == TCL_OK && targetCmdObj != NULL) {
+	    /*
+	     * Got it. Skip the fiddling around with prefixes.
+	     */
+
+	    replacement = subcmdObj;
+	    goto doneMapLookup;
+	}
+	TclDecrRefCount(subcmdObj);
+
+	/*
+	 * We've not literally got a valid subcommand. But maybe we have a
+	 * prefix. Check if prefix matches are allowed.
+	 */
+
+	if (!(flags & TCL_ENSEMBLE_PREFIX)) {
+	    goto failed;
+	}
+
+	/*
+	 * Iterate over the keys in the dictionary, checking to see if we're a
+	 * prefix.
+	 */
+
+	Tcl_DictObjFirst(NULL, mapObj, &s, &subcmdObj, &tmpObj, &done);
+	matched = 0;
+	replacement = NULL;		/* Silence, fool compiler! */
+	while (!done) {
+	    if (strncmp(TclGetString(subcmdObj), word, numBytes) == 0) {
+		if (matched++) {
+		    /*
+		     * Must have matched twice! Not unique, so no point
+		     * looking further.
+		     */
+
+		    break;
+		}
+		replacement = subcmdObj;
+		targetCmdObj = tmpObj;
+	    }
+	    Tcl_DictObjNext(&s, &subcmdObj, &tmpObj, &done);
+	}
+	Tcl_DictObjDone(&s);
+
+	/*
+	 * If we have anything other than a single match, we've failed the
+	 * unique prefix check.
+	 */
+
+	if (matched != 1) {
+	    invokeAnyway = 1;
+	    goto failed;
+	}
+    }
+
+    /*
+     * OK, we definitely map to something. But what?
+     *
+     * The command we map to is the first word out of the map element. Note
+     * that we also reject dealing with multi-element rewrites if we are in a
+     * safe interpreter, as there is otherwise a (highly gnarly!) way to make
+     * Tcl crash open to exploit.
+     */
+
+  doneMapLookup:
+    Tcl_ListObjAppendElement(NULL, replaced, replacement);
+    if (Tcl_ListObjGetElements(NULL, targetCmdObj, &len, &elems) != TCL_OK) {
+	goto failed;
+    } else if (len != 1) {
+	/*
+	 * Note that at this point we know we can't issue any special
+	 * instruction sequence as the mapping isn't one that we support at
+	 * the compiled level.
+	 */
+
+	goto cleanup;
+    }
+    targetCmdObj = elems[0];
+
+    oldCmdPtr = cmdPtr;
+    Tcl_IncrRefCount(targetCmdObj);
+    newCmdPtr = (Command *) Tcl_GetCommandFromObj(interp, targetCmdObj);
+    TclDecrRefCount(targetCmdObj);
+    if (newCmdPtr == NULL || Tcl_IsSafe(interp)
+	    || newCmdPtr->nsPtr->flags & NS_SUPPRESS_COMPILATION
+	    || newCmdPtr->flags & CMD_HAS_EXEC_TRACES
+	    || ((Interp *)interp)->flags & DONT_COMPILE_CMDS_INLINE) {
+	/*
+	 * Maps to an undefined command or a command without a compiler.
+	 * Cannot compile.
+	 */
+
+	goto cleanup;
+    }
+    cmdPtr = newCmdPtr;
+    depth++;
+
+    /*
+     * See whether we have a nested ensemble. If we do, we can go round the
+     * mulberry bush again, consuming the next word.
+     */
+
+    if (cmdPtr->compileProc == TclCompileEnsemble) {
+	tokenPtr = TokenAfter(tokenPtr);
+	if (parsePtr->numWords < depth + 1
+		|| tokenPtr->type != TCL_TOKEN_SIMPLE_WORD) {
+	    /*
+	     * Too hard because the user has done something unpleasant like
+	     * omitting the sub-ensemble's command name or used a non-constant
+	     * name for a sub-ensemble's command name; we respond by bailing
+	     * out completely (this is a rare case). [Bug 6d2f249a01]
+	     */
+
+	    goto cleanup;
+	}
+	ensemble = (Tcl_Command) cmdPtr;
+	goto checkNextWord;
+    }
+
+    /*
+     * Now we've done the mapping process, can now actually try to compile.
+     * If there is a subcommand compiler and that successfully produces code,
+     * we'll use that. Otherwise, we fall back to generating opcodes to do the
+     * invoke at runtime.
+     */
+
+    invokeAnyway = 1;
+    if (TCL_OK == TclAttemptCompileProc(interp, parsePtr, depth, cmdPtr,
+	    envPtr)) {
+	ourResult = TCL_OK;
+	goto cleanup;
+    }
+
+    /*
+     * Throw out any line information generated by the failed compile attempt.
+     */
+
+    while (mapPtr->nuloc - 1 > eclIndex) {
+        mapPtr->nuloc--;
+        ckfree(mapPtr->loc[mapPtr->nuloc].line);
+        mapPtr->loc[mapPtr->nuloc].line = NULL;
+    }
+
+    /*
+     * Reset the index of next command.  Toss out any from failed nested
+     * partial compiles.
+     */
+
+    envPtr->numCommands = mapPtr->nuloc;
+
+    /*
+     * Failed to do a full compile for some reason. Try to do a direct invoke
+     * instead of going through the ensemble lookup process again.
+     */
+
+  failed:
+    if (depth < 250) {
+	if (depth > 1) {
+	    if (!invokeAnyway) {
+		cmdPtr = oldCmdPtr;
+		depth--;
+	    }
+	}
+	/*
+	 * The length of the "replaced" list must be depth-1.  Trim back
+	 * any extra elements that might have been appended by failing
+	 * pathways above.
+	 */
+	(void) Tcl_ListObjReplace(NULL, replaced, depth-1, LIST_MAX, 0, NULL);
+
+	/*
+	 * TODO: Reconsider whether we ought to call CompileToInvokedCommand()
+	 * when depth==1.  In that case we are choosing to emit the
+	 * INST_INVOKE_REPLACE bytecode when there is in fact no replacing
+	 * to be done.  It would be equally functional and presumably more
+	 * performant to fall through to cleanup below, return TCL_ERROR,
+	 * and let the compiler harness emit the INST_INVOKE_STK
+	 * implementation for us.
+	 */
+
+	CompileToInvokedCommand(interp, parsePtr, replaced, cmdPtr, envPtr);
+	ourResult = TCL_OK;
+    }
+
+    /*
+     * Release the memory we allocated. If we've got here, we've either done
+     * something useful or we're in a case that we can't compile at all and
+     * we're just giving up.
+     */
+
+  cleanup:
+    Tcl_DecrRefCount(replaced);
+    return ourResult;
+}
+
+int
+TclAttemptCompileProc(
+    Tcl_Interp *interp,
+    Tcl_Parse *parsePtr,
+    int depth,
+    Command *cmdPtr,
+    CompileEnv *envPtr)		/* Holds resulting instructions. */
+{
+    int result, i;
+    Tcl_Token *saveTokenPtr = parsePtr->tokenPtr;
+    int savedStackDepth = envPtr->currStackDepth;
+    unsigned savedCodeNext = envPtr->codeNext - envPtr->codeStart;
+    int savedAuxDataArrayNext = envPtr->auxDataArrayNext;
+    int savedExceptArrayNext = envPtr->exceptArrayNext;
+#ifdef TCL_COMPILE_DEBUG
+    int savedExceptDepth = envPtr->exceptDepth;
+#endif
+    DefineLineInformation;
+
+    if (cmdPtr->compileProc == NULL) {
+	return TCL_ERROR;
+    }
+
+    /*
+     * Advance parsePtr->tokenPtr so that it points at the last subcommand.
+     * This will be wrong, but it will not matter, and it will put the
+     * tokens for the arguments in the right place without the needed to
+     * allocate a synthetic Tcl_Parse struct, or copy tokens around.
+     */
+
+    for (i = 0; i < depth - 1; i++) {
+	parsePtr->tokenPtr = TokenAfter(parsePtr->tokenPtr);
+    }
+    parsePtr->numWords -= (depth - 1);
+
+    /*
+     * Shift the line information arrays to account for different word
+     * index values.
+     */
+
+    mapPtr->loc[eclIndex].line += (depth - 1);
+    mapPtr->loc[eclIndex].next += (depth - 1);
+
+    /*
+     * Hand off compilation to the subcommand compiler. At last!
+     */
+
+    result = cmdPtr->compileProc(interp, parsePtr, cmdPtr, envPtr);
+
+    /*
+     * Undo the shift.
+     */
+
+    mapPtr->loc[eclIndex].line -= (depth - 1);
+    mapPtr->loc[eclIndex].next -= (depth - 1);
+
+    parsePtr->numWords += (depth - 1);
+    parsePtr->tokenPtr = saveTokenPtr;
+
+    /*
+     * If our target failed to compile, revert any data from failed partial
+     * compiles.  Note that envPtr->numCommands need not be checked because
+     * we avoid compiling subcommands that recursively call TclCompileScript().
+     */
+
+#ifdef TCL_COMPILE_DEBUG
+    if (envPtr->exceptDepth != savedExceptDepth) {
+	Tcl_Panic("ExceptionRange Starts and Ends do not balance");
+    }
+#endif
+
+    if (result != TCL_OK) {
+	ExceptionAux *auxPtr = envPtr->exceptAuxArrayPtr;
+
+	for (i = 0; i < savedExceptArrayNext; i++) {
+	    while (auxPtr->numBreakTargets > 0
+		    && auxPtr->breakTargets[auxPtr->numBreakTargets - 1]
+		    >= savedCodeNext) {
+		auxPtr->numBreakTargets--;
+	    }
+	    while (auxPtr->numContinueTargets > 0
+		    && auxPtr->continueTargets[auxPtr->numContinueTargets - 1]
+		    >= savedCodeNext) {
+		auxPtr->numContinueTargets--;
+	    }
+	    auxPtr++;
+	}
+	envPtr->exceptArrayNext = savedExceptArrayNext;
+
+	if (savedAuxDataArrayNext != envPtr->auxDataArrayNext) {
+	    AuxData *auxDataPtr = envPtr->auxDataArrayPtr;
+	    AuxData *auxDataEnd = auxDataPtr;
+
+	    auxDataPtr += savedAuxDataArrayNext;
+	    auxDataEnd += envPtr->auxDataArrayNext;
+
+	    while (auxDataPtr < auxDataEnd) {
+		if (auxDataPtr->type->freeProc != NULL) {
+		    auxDataPtr->type->freeProc(auxDataPtr->clientData);
+		}
+		auxDataPtr++;
+	    }
+	    envPtr->auxDataArrayNext = savedAuxDataArrayNext;
+	}
+	envPtr->currStackDepth = savedStackDepth;
+	envPtr->codeNext = envPtr->codeStart + savedCodeNext;
+#ifdef TCL_COMPILE_DEBUG
+    } else {
+	/*
+	 * Confirm that the command compiler generated a single value on
+	 * the stack as its result. This is only done in debugging mode,
+	 * as it *should* be correct and normal users have no reasonable
+	 * way to fix it anyway.
+	 */
+
+	int diff = envPtr->currStackDepth - savedStackDepth;
+
+	if (diff != 1) {
+	    Tcl_Panic("bad stack adjustment when compiling"
+		    " %.*s (was %d instead of 1)", parsePtr->tokenPtr->size,
+		    parsePtr->tokenPtr->start, diff);
+	}
+#endif
+    }
+
+    return result;
+}
+
+/*
+ * How to compile a subcommand to a _replacing_ invoke of its implementation
+ * command.
+ */
+
+static void
+CompileToInvokedCommand(
+    Tcl_Interp *interp,
+    Tcl_Parse *parsePtr,
+    Tcl_Obj *replacements,
+    Command *cmdPtr,
+    CompileEnv *envPtr)		/* Holds resulting instructions. */
+{
+    Tcl_Token *tokPtr;
+    Tcl_Obj *objPtr, **words;
+    char *bytes;
+    int length, i, numWords, cmdLit, extraLiteralFlags = LITERAL_CMD_NAME;
+    DefineLineInformation;
+
+    /*
+     * Push the words of the command. Take care; the command words may be
+     * scripts that have backslashes in them, and [info frame 0] can see the
+     * difference. Hence the call to TclContinuationsEnterDerived...
+     */
+
+    Tcl_ListObjGetElements(NULL, replacements, &numWords, &words);
+    for (i = 0, tokPtr = parsePtr->tokenPtr; i < parsePtr->numWords;
+	    i++, tokPtr = TokenAfter(tokPtr)) {
+	if (i > 0 && i < numWords+1) {
+	    bytes = Tcl_GetStringFromObj(words[i-1], &length);
+	    PushLiteral(envPtr, bytes, length);
+	    continue;
+	}
+
+	SetLineInformation(i);
+	if (tokPtr->type == TCL_TOKEN_SIMPLE_WORD) {
+	    int literal = TclRegisterNewLiteral(envPtr,
+		    tokPtr[1].start, tokPtr[1].size);
+
+	    if (envPtr->clNext) {
+		TclContinuationsEnterDerived(
+			TclFetchLiteral(envPtr, literal),
+			tokPtr[1].start - envPtr->source,
+			envPtr->clNext);
+	    }
+	    TclEmitPush(literal, envPtr);
+	} else {
+	    CompileTokens(envPtr, tokPtr, interp);
+	}
+    }
+
+    /*
+     * Push the name of the command we're actually dispatching to as part of
+     * the implementation.
+     */
+
+    objPtr = Tcl_NewObj();
+    Tcl_GetCommandFullName(interp, (Tcl_Command) cmdPtr, objPtr);
+    bytes = Tcl_GetStringFromObj(objPtr, &length);
+    if ((cmdPtr != NULL) && (cmdPtr->flags & CMD_VIA_RESOLVER)) {
+	extraLiteralFlags |= LITERAL_UNSHARED;
+    }
+    cmdLit = TclRegisterLiteral(envPtr, (char *)bytes, length, extraLiteralFlags);
+    TclSetCmdNameObj(interp, TclFetchLiteral(envPtr, cmdLit), cmdPtr);
+    TclEmitPush(cmdLit, envPtr);
+    TclDecrRefCount(objPtr);
+
+    /*
+     * Do the replacing dispatch.
+     */
+
+    TclEmitInvoke(envPtr, INST_INVOKE_REPLACE, parsePtr->numWords,numWords+1);
+}
+
+/*
+ * Helpers that do issuing of instructions for commands that "don't have
+ * compilers" (well, they do; these). They all work by just generating base
+ * code to invoke the command; they're intended for ensemble subcommands so
+ * that the costs of INST_INVOKE_REPLACE can be avoided where we can work out
+ * that they're not needed.
+ *
+ * Note that these are NOT suitable for commands where there's an argument
+ * that is a script, as an [info level] or [info frame] in the inner context
+ * can see the difference.
+ */
+
+static int
+CompileBasicNArgCommand(
+    Tcl_Interp *interp,		/* Used for error reporting. */
+    Tcl_Parse *parsePtr,	/* Points to a parse structure for the command
+				 * created by Tcl_ParseCommand. */
+    Command *cmdPtr,		/* Points to defintion of command being
+				 * compiled. */
+    CompileEnv *envPtr)		/* Holds resulting instructions. */
+{
+    Tcl_Obj *objPtr = Tcl_NewObj();
+
+    Tcl_IncrRefCount(objPtr);
+    Tcl_GetCommandFullName(interp, (Tcl_Command) cmdPtr, objPtr);
+    TclCompileInvocation(interp, parsePtr->tokenPtr, objPtr,
+	    parsePtr->numWords, envPtr);
+    Tcl_DecrRefCount(objPtr);
+    return TCL_OK;
+}
+
+int
+TclCompileBasic0ArgCmd(
+    Tcl_Interp *interp,		/* Used for error reporting. */
+    Tcl_Parse *parsePtr,	/* Points to a parse structure for the command
+				 * created by Tcl_ParseCommand. */
+    Command *cmdPtr,		/* Points to defintion of command being
+				 * compiled. */
+    CompileEnv *envPtr)		/* Holds resulting instructions. */
+{
+    /*
+     * Verify that the number of arguments is correct; that's the only case
+     * that we know will avoid the call to Tcl_WrongNumArgs() at invoke time,
+     * which is the only code that sees the shenanigans of ensemble dispatch.
+     */
+
+    if (parsePtr->numWords != 1) {
+	return TCL_ERROR;
+    }
+
+    return CompileBasicNArgCommand(interp, parsePtr, cmdPtr, envPtr);
+}
+
+int
+TclCompileBasic1ArgCmd(
+    Tcl_Interp *interp,		/* Used for error reporting. */
+    Tcl_Parse *parsePtr,	/* Points to a parse structure for the command
+				 * created by Tcl_ParseCommand. */
+    Command *cmdPtr,		/* Points to defintion of command being
+				 * compiled. */
+    CompileEnv *envPtr)		/* Holds resulting instructions. */
+{
+    /*
+     * Verify that the number of arguments is correct; that's the only case
+     * that we know will avoid the call to Tcl_WrongNumArgs() at invoke time,
+     * which is the only code that sees the shenanigans of ensemble dispatch.
+     */
+
+    if (parsePtr->numWords != 2) {
+	return TCL_ERROR;
+    }
+
+    return CompileBasicNArgCommand(interp, parsePtr, cmdPtr, envPtr);
+}
+
+int
+TclCompileBasic2ArgCmd(
+    Tcl_Interp *interp,		/* Used for error reporting. */
+    Tcl_Parse *parsePtr,	/* Points to a parse structure for the command
+				 * created by Tcl_ParseCommand. */
+    Command *cmdPtr,		/* Points to defintion of command being
+				 * compiled. */
+    CompileEnv *envPtr)		/* Holds resulting instructions. */
+{
+    /*
+     * Verify that the number of arguments is correct; that's the only case
+     * that we know will avoid the call to Tcl_WrongNumArgs() at invoke time,
+     * which is the only code that sees the shenanigans of ensemble dispatch.
+     */
+
+    if (parsePtr->numWords != 3) {
+	return TCL_ERROR;
+    }
+
+    return CompileBasicNArgCommand(interp, parsePtr, cmdPtr, envPtr);
+}
+
+int
+TclCompileBasic3ArgCmd(
+    Tcl_Interp *interp,		/* Used for error reporting. */
+    Tcl_Parse *parsePtr,	/* Points to a parse structure for the command
+				 * created by Tcl_ParseCommand. */
+    Command *cmdPtr,		/* Points to defintion of command being
+				 * compiled. */
+    CompileEnv *envPtr)		/* Holds resulting instructions. */
+{
+    /*
+     * Verify that the number of arguments is correct; that's the only case
+     * that we know will avoid the call to Tcl_WrongNumArgs() at invoke time,
+     * which is the only code that sees the shenanigans of ensemble dispatch.
+     */
+
+    if (parsePtr->numWords != 4) {
+	return TCL_ERROR;
+    }
+
+    return CompileBasicNArgCommand(interp, parsePtr, cmdPtr, envPtr);
+}
+
+int
+TclCompileBasic0Or1ArgCmd(
+    Tcl_Interp *interp,		/* Used for error reporting. */
+    Tcl_Parse *parsePtr,	/* Points to a parse structure for the command
+				 * created by Tcl_ParseCommand. */
+    Command *cmdPtr,		/* Points to defintion of command being
+				 * compiled. */
+    CompileEnv *envPtr)		/* Holds resulting instructions. */
+{
+    /*
+     * Verify that the number of arguments is correct; that's the only case
+     * that we know will avoid the call to Tcl_WrongNumArgs() at invoke time,
+     * which is the only code that sees the shenanigans of ensemble dispatch.
+     */
+
+    if (parsePtr->numWords != 1 && parsePtr->numWords != 2) {
+	return TCL_ERROR;
+    }
+
+    return CompileBasicNArgCommand(interp, parsePtr, cmdPtr, envPtr);
+}
+
+int
+TclCompileBasic1Or2ArgCmd(
+    Tcl_Interp *interp,		/* Used for error reporting. */
+    Tcl_Parse *parsePtr,	/* Points to a parse structure for the command
+				 * created by Tcl_ParseCommand. */
+    Command *cmdPtr,		/* Points to defintion of command being
+				 * compiled. */
+    CompileEnv *envPtr)		/* Holds resulting instructions. */
+{
+    /*
+     * Verify that the number of arguments is correct; that's the only case
+     * that we know will avoid the call to Tcl_WrongNumArgs() at invoke time,
+     * which is the only code that sees the shenanigans of ensemble dispatch.
+     */
+
+    if (parsePtr->numWords != 2 && parsePtr->numWords != 3) {
+	return TCL_ERROR;
+    }
+
+    return CompileBasicNArgCommand(interp, parsePtr, cmdPtr, envPtr);
+}
+
+int
+TclCompileBasic2Or3ArgCmd(
+    Tcl_Interp *interp,		/* Used for error reporting. */
+    Tcl_Parse *parsePtr,	/* Points to a parse structure for the command
+				 * created by Tcl_ParseCommand. */
+    Command *cmdPtr,		/* Points to defintion of command being
+				 * compiled. */
+    CompileEnv *envPtr)		/* Holds resulting instructions. */
+{
+    /*
+     * Verify that the number of arguments is correct; that's the only case
+     * that we know will avoid the call to Tcl_WrongNumArgs() at invoke time,
+     * which is the only code that sees the shenanigans of ensemble dispatch.
+     */
+
+    if (parsePtr->numWords != 3 && parsePtr->numWords != 4) {
+	return TCL_ERROR;
+    }
+
+    return CompileBasicNArgCommand(interp, parsePtr, cmdPtr, envPtr);
+}
+
+int
+TclCompileBasic0To2ArgCmd(
+    Tcl_Interp *interp,		/* Used for error reporting. */
+    Tcl_Parse *parsePtr,	/* Points to a parse structure for the command
+				 * created by Tcl_ParseCommand. */
+    Command *cmdPtr,		/* Points to defintion of command being
+				 * compiled. */
+    CompileEnv *envPtr)		/* Holds resulting instructions. */
+{
+    /*
+     * Verify that the number of arguments is correct; that's the only case
+     * that we know will avoid the call to Tcl_WrongNumArgs() at invoke time,
+     * which is the only code that sees the shenanigans of ensemble dispatch.
+     */
+
+    if (parsePtr->numWords < 1 || parsePtr->numWords > 3) {
+	return TCL_ERROR;
+    }
+
+    return CompileBasicNArgCommand(interp, parsePtr, cmdPtr, envPtr);
+}
+
+int
+TclCompileBasic1To3ArgCmd(
+    Tcl_Interp *interp,		/* Used for error reporting. */
+    Tcl_Parse *parsePtr,	/* Points to a parse structure for the command
+				 * created by Tcl_ParseCommand. */
+    Command *cmdPtr,		/* Points to defintion of command being
+				 * compiled. */
+    CompileEnv *envPtr)		/* Holds resulting instructions. */
+{
+    /*
+     * Verify that the number of arguments is correct; that's the only case
+     * that we know will avoid the call to Tcl_WrongNumArgs() at invoke time,
+     * which is the only code that sees the shenanigans of ensemble dispatch.
+     */
+
+    if (parsePtr->numWords < 2 || parsePtr->numWords > 4) {
+	return TCL_ERROR;
+    }
+
+    return CompileBasicNArgCommand(interp, parsePtr, cmdPtr, envPtr);
+}
+
+int
+TclCompileBasicMin0ArgCmd(
+    Tcl_Interp *interp,		/* Used for error reporting. */
+    Tcl_Parse *parsePtr,	/* Points to a parse structure for the command
+				 * created by Tcl_ParseCommand. */
+    Command *cmdPtr,		/* Points to defintion of command being
+				 * compiled. */
+    CompileEnv *envPtr)		/* Holds resulting instructions. */
+{
+    /*
+     * Verify that the number of arguments is correct; that's the only case
+     * that we know will avoid the call to Tcl_WrongNumArgs() at invoke time,
+     * which is the only code that sees the shenanigans of ensemble dispatch.
+     */
+
+    if (parsePtr->numWords < 1) {
+	return TCL_ERROR;
+    }
+
+    return CompileBasicNArgCommand(interp, parsePtr, cmdPtr, envPtr);
+}
+
+int
+TclCompileBasicMin1ArgCmd(
+    Tcl_Interp *interp,		/* Used for error reporting. */
+    Tcl_Parse *parsePtr,	/* Points to a parse structure for the command
+				 * created by Tcl_ParseCommand. */
+    Command *cmdPtr,		/* Points to defintion of command being
+				 * compiled. */
+    CompileEnv *envPtr)		/* Holds resulting instructions. */
+{
+    /*
+     * Verify that the number of arguments is correct; that's the only case
+     * that we know will avoid the call to Tcl_WrongNumArgs() at invoke time,
+     * which is the only code that sees the shenanigans of ensemble dispatch.
+     */
+
+    if (parsePtr->numWords < 2) {
+	return TCL_ERROR;
+    }
+
+    return CompileBasicNArgCommand(interp, parsePtr, cmdPtr, envPtr);
+}
+
+int
+TclCompileBasicMin2ArgCmd(
+    Tcl_Interp *interp,		/* Used for error reporting. */
+    Tcl_Parse *parsePtr,	/* Points to a parse structure for the command
+				 * created by Tcl_ParseCommand. */
+    Command *cmdPtr,		/* Points to defintion of command being
+				 * compiled. */
+    CompileEnv *envPtr)		/* Holds resulting instructions. */
+{
+    /*
+     * Verify that the number of arguments is correct; that's the only case
+     * that we know will avoid the call to Tcl_WrongNumArgs() at invoke time,
+     * which is the only code that sees the shenanigans of ensemble dispatch.
+     */
+
+    if (parsePtr->numWords < 3) {
+	return TCL_ERROR;
+    }
+
+    return CompileBasicNArgCommand(interp, parsePtr, cmdPtr, envPtr);
+}
+
+/*
+ * Local Variables:
+ * mode: c
+ * c-basic-offset: 4
+ * fill-column: 78
+ * End:
+ */
diff --git a/generic/tclInt.h b/generic/tclInt.h
new file mode 100644
index 0000000..567a28c
--- /dev/null
+++ b/generic/tclInt.h
@@ -0,0 +1,4905 @@
+/*
+ * tclInt.h --
+ *
+ *	Declarations of things used internally by the Tcl interpreter.
+ *
+ * Copyright (c) 1987-1993 The Regents of the University of California.
+ * Copyright (c) 1993-1997 Lucent Technologies.
+ * Copyright (c) 1994-1998 Sun Microsystems, Inc.
+ * Copyright (c) 1998-1999 by Scriptics Corporation.
+ * Copyright (c) 2001, 2002 by Kevin B. Kenny.  All rights reserved.
+ * Copyright (c) 2007 Daniel A. Steffen <das@users.sourceforge.net>
+ * Copyright (c) 2006-2008 by Joe Mistachkin.  All rights reserved.
+ * Copyright (c) 2008 by Miguel Sofer. All rights reserved.
+ *
+ * See the file "license.terms" for information on usage and redistribution of
+ * this file, and for a DISCLAIMER OF ALL WARRANTIES.
+ */
+
+#ifndef _TCLINT
+#define _TCLINT
+
+/*
+ * Some numerics configuration options.
+ */
+
+#undef ACCEPT_NAN
+
+/*
+ * Common include files needed by most of the Tcl source files are included
+ * here, so that system-dependent personalizations for the include files only
+ * have to be made in once place. This results in a few extra includes, but
+ * greater modularity. The order of the three groups of #includes is
+ * important. For example, stdio.h is needed by tcl.h.
+ */
+
+#include "tclPort.h"
+
+#include <stdio.h>
+
+#include <ctype.h>
+#ifdef NO_STDLIB_H
+#   include "../compat/stdlib.h"
+#else
+#   include <stdlib.h>
+#endif
+#ifdef NO_STRING_H
+#include "../compat/string.h"
+#else
+#include <string.h>
+#endif
+#if defined(STDC_HEADERS) || defined(__STDC__) || defined(__C99__FUNC__) \
+     || defined(__cplusplus) || defined(_MSC_VER)
+#include <stddef.h>
+#else
+typedef int ptrdiff_t;
+#endif
+
+/*
+ * Ensure WORDS_BIGENDIAN is defined correctly:
+ * Needs to happen here in addition to configure to work with fat compiles on
+ * Darwin (where configure runs only once for multiple architectures).
+ */
+
+#ifdef HAVE_SYS_TYPES_H
+#    include <sys/types.h>
+#endif
+#ifdef HAVE_SYS_PARAM_H
+#    include <sys/param.h>
+#endif
+#ifdef BYTE_ORDER
+#    ifdef BIG_ENDIAN
+#	 if BYTE_ORDER == BIG_ENDIAN
+#	     undef WORDS_BIGENDIAN
+#	     define WORDS_BIGENDIAN 1
+#	 endif
+#    endif
+#    ifdef LITTLE_ENDIAN
+#	 if BYTE_ORDER == LITTLE_ENDIAN
+#	     undef WORDS_BIGENDIAN
+#	 endif
+#    endif
+#endif
+
+/*
+ * Used to tag functions that are only to be visible within the module being
+ * built and not outside it (where this is supported by the linker).
+ */
+
+#ifndef MODULE_SCOPE
+#   ifdef __cplusplus
+#	define MODULE_SCOPE extern "C"
+#   else
+#	define MODULE_SCOPE extern
+#   endif
+#endif
+
+/*
+ * Macros used to cast between pointers and integers (e.g. when storing an int
+ * in ClientData), on 64-bit architectures they avoid gcc warning about "cast
+ * to/from pointer from/to integer of different size".
+ */
+
+#if !defined(INT2PTR) && !defined(PTR2INT)
+#   if defined(HAVE_INTPTR_T) || defined(intptr_t)
+#	define INT2PTR(p) ((void *)(intptr_t)(p))
+#	define PTR2INT(p) ((int)(intptr_t)(p))
+#   else
+#	define INT2PTR(p) ((void *)(p))
+#	define PTR2INT(p) ((int)(p))
+#   endif
+#endif
+#if !defined(UINT2PTR) && !defined(PTR2UINT)
+#   if defined(HAVE_UINTPTR_T) || defined(uintptr_t)
+#	define UINT2PTR(p) ((void *)(uintptr_t)(p))
+#	define PTR2UINT(p) ((unsigned int)(uintptr_t)(p))
+#   else
+#	define UINT2PTR(p) ((void *)(p))
+#	define PTR2UINT(p) ((unsigned int)(p))
+#   endif
+#endif
+
+#if defined(_WIN32) && defined(_MSC_VER)
+#   define vsnprintf _vsnprintf
+#endif
+
+/*
+ * The following procedures allow namespaces to be customized to support
+ * special name resolution rules for commands/variables.
+ */
+
+struct Tcl_ResolvedVarInfo;
+
+typedef Tcl_Var (Tcl_ResolveRuntimeVarProc)(Tcl_Interp *interp,
+	struct Tcl_ResolvedVarInfo *vinfoPtr);
+
+typedef void (Tcl_ResolveVarDeleteProc)(struct Tcl_ResolvedVarInfo *vinfoPtr);
+
+/*
+ * The following structure encapsulates the routines needed to resolve a
+ * variable reference at runtime. Any variable specific state will typically
+ * be appended to this structure.
+ */
+
+typedef struct Tcl_ResolvedVarInfo {
+    Tcl_ResolveRuntimeVarProc *fetchProc;
+    Tcl_ResolveVarDeleteProc *deleteProc;
+} Tcl_ResolvedVarInfo;
+
+typedef int (Tcl_ResolveCompiledVarProc)(Tcl_Interp *interp,
+	CONST84 char *name, int length, Tcl_Namespace *context,
+	Tcl_ResolvedVarInfo **rPtr);
+
+typedef int (Tcl_ResolveVarProc)(Tcl_Interp *interp, CONST84 char *name,
+	Tcl_Namespace *context, int flags, Tcl_Var *rPtr);
+
+typedef int (Tcl_ResolveCmdProc)(Tcl_Interp *interp, CONST84 char *name,
+	Tcl_Namespace *context, int flags, Tcl_Command *rPtr);
+
+typedef struct Tcl_ResolverInfo {
+    Tcl_ResolveCmdProc *cmdResProc;
+				/* Procedure handling command name
+				 * resolution. */
+    Tcl_ResolveVarProc *varResProc;
+				/* Procedure handling variable name resolution
+				 * for variables that can only be handled at
+				 * runtime. */
+    Tcl_ResolveCompiledVarProc *compiledVarResProc;
+				/* Procedure handling variable name resolution
+				 * at compile time. */
+} Tcl_ResolverInfo;
+
+/*
+ * This flag bit should not interfere with TCL_GLOBAL_ONLY,
+ * TCL_NAMESPACE_ONLY, or TCL_LEAVE_ERR_MSG; it signals that the variable
+ * lookup is performed for upvar (or similar) purposes, with slightly
+ * different rules:
+ *    - Bug #696893 - variable is either proc-local or in the current
+ *	namespace; never follow the second (global) resolution path
+ *    - Bug #631741 - do not use special namespace or interp resolvers
+ *
+ * It should also not collide with the (deprecated) TCL_PARSE_PART1 flag
+ * (Bug #835020)
+ */
+
+#define TCL_AVOID_RESOLVERS 0x40000
+
+/*
+ *----------------------------------------------------------------
+ * Data structures related to namespaces.
+ *----------------------------------------------------------------
+ */
+
+typedef struct Tcl_Ensemble Tcl_Ensemble;
+typedef struct NamespacePathEntry NamespacePathEntry;
+
+/*
+ * Special hashtable for variables: this is just a Tcl_HashTable with an nsPtr
+ * field added at the end: in this way variables can find their namespace
+ * without having to copy a pointer in their struct: they can access it via
+ * their hPtr->tablePtr.
+ */
+
+typedef struct TclVarHashTable {
+    Tcl_HashTable table;
+    struct Namespace *nsPtr;
+} TclVarHashTable;
+
+/*
+ * This is for itcl - it likes to search our varTables directly :(
+ */
+
+#define TclVarHashFindVar(tablePtr, key) \
+    TclVarHashCreateVar((tablePtr), (key), NULL)
+
+/*
+ * Define this to reduce the amount of space that the average namespace
+ * consumes by only allocating the table of child namespaces when necessary.
+ * Defining it breaks compatibility for Tcl extensions (e.g., itcl) which
+ * reach directly into the Namespace structure.
+ */
+
+#undef BREAK_NAMESPACE_COMPAT
+
+/*
+ * The structure below defines a namespace.
+ * Note: the first five fields must match exactly the fields in a
+ * Tcl_Namespace structure (see tcl.h). If you change one, be sure to change
+ * the other.
+ */
+
+typedef struct Namespace {
+    char *name;			/* The namespace's simple (unqualified) name.
+				 * This contains no ::'s. The name of the
+				 * global namespace is "" although "::" is an
+				 * synonym. */
+    char *fullName;		/* The namespace's fully qualified name. This
+				 * starts with ::. */
+    ClientData clientData;	/* An arbitrary value associated with this
+				 * namespace. */
+    Tcl_NamespaceDeleteProc *deleteProc;
+				/* Procedure invoked when deleting the
+				 * namespace to, e.g., free clientData. */
+    struct Namespace *parentPtr;/* Points to the namespace that contains this
+				 * one. NULL if this is the global
+				 * namespace. */
+#ifndef BREAK_NAMESPACE_COMPAT
+    Tcl_HashTable childTable;	/* Contains any child namespaces. Indexed by
+				 * strings; values have type (Namespace *). */
+#else
+    Tcl_HashTable *childTablePtr;
+				/* Contains any child namespaces. Indexed by
+				 * strings; values have type (Namespace *). If
+				 * NULL, there are no children. */
+#endif
+    long nsId;			/* Unique id for the namespace. */
+    Tcl_Interp *interp;		/* The interpreter containing this
+				 * namespace. */
+    int flags;			/* OR-ed combination of the namespace status
+				 * flags NS_DYING and NS_DEAD listed below. */
+    int activationCount;	/* Number of "activations" or active call
+				 * frames for this namespace that are on the
+				 * Tcl call stack. The namespace won't be
+				 * freed until activationCount becomes zero. */
+    int refCount;		/* Count of references by namespaceName
+				 * objects. The namespace can't be freed until
+				 * refCount becomes zero. */
+    Tcl_HashTable cmdTable;	/* Contains all the commands currently
+				 * registered in the namespace. Indexed by
+				 * strings; values have type (Command *).
+				 * Commands imported by Tcl_Import have
+				 * Command structures that point (via an
+				 * ImportedCmdRef structure) to the Command
+				 * structure in the source namespace's command
+				 * table. */
+    TclVarHashTable varTable;	/* Contains all the (global) variables
+				 * currently in this namespace. Indexed by
+				 * strings; values have type (Var *). */
+    char **exportArrayPtr;	/* Points to an array of string patterns
+				 * specifying which commands are exported. A
+				 * pattern may include "string match" style
+				 * wildcard characters to specify multiple
+				 * commands; however, no namespace qualifiers
+				 * are allowed. NULL if no export patterns are
+				 * registered. */
+    int numExportPatterns;	/* Number of export patterns currently
+				 * registered using "namespace export". */
+    int maxExportPatterns;	/* Mumber of export patterns for which space
+				 * is currently allocated. */
+    int cmdRefEpoch;		/* Incremented if a newly added command
+				 * shadows a command for which this namespace
+				 * has already cached a Command* pointer; this
+				 * causes all its cached Command* pointers to
+				 * be invalidated. */
+    int resolverEpoch;		/* Incremented whenever (a) the name
+				 * resolution rules change for this namespace
+				 * or (b) a newly added command shadows a
+				 * command that is compiled to bytecodes. This
+				 * invalidates all byte codes compiled in the
+				 * namespace, causing the code to be
+				 * recompiled under the new rules.*/
+    Tcl_ResolveCmdProc *cmdResProc;
+				/* If non-null, this procedure overrides the
+				 * usual command resolution mechanism in Tcl.
+				 * This procedure is invoked within
+				 * Tcl_FindCommand to resolve all command
+				 * references within the namespace. */
+    Tcl_ResolveVarProc *varResProc;
+				/* If non-null, this procedure overrides the
+				 * usual variable resolution mechanism in Tcl.
+				 * This procedure is invoked within
+				 * Tcl_FindNamespaceVar to resolve all
+				 * variable references within the namespace at
+				 * runtime. */
+    Tcl_ResolveCompiledVarProc *compiledVarResProc;
+				/* If non-null, this procedure overrides the
+				 * usual variable resolution mechanism in Tcl.
+				 * This procedure is invoked within
+				 * LookupCompiledLocal to resolve variable
+				 * references within the namespace at compile
+				 * time. */
+    int exportLookupEpoch;	/* Incremented whenever a command is added to
+				 * a namespace, removed from a namespace or
+				 * the exports of a namespace are changed.
+				 * Allows TIP#112-driven command lists to be
+				 * validated efficiently. */
+    Tcl_Ensemble *ensembles;	/* List of structures that contain the details
+				 * of the ensembles that are implemented on
+				 * top of this namespace. */
+    Tcl_Obj *unknownHandlerPtr;	/* A script fragment to be used when command
+				 * resolution in this namespace fails. TIP
+				 * 181. */
+    int commandPathLength;	/* The length of the explicit path. */
+    NamespacePathEntry *commandPathArray;
+				/* The explicit path of the namespace as an
+				 * array. */
+    NamespacePathEntry *commandPathSourceList;
+				/* Linked list of path entries that point to
+				 * this namespace. */
+    Tcl_NamespaceDeleteProc *earlyDeleteProc;
+				/* Just like the deleteProc field (and called
+				 * with the same clientData) but called at the
+				 * start of the deletion process, so there is
+				 * a chance for code to do stuff inside the
+				 * namespace before deletion completes. */
+} Namespace;
+
+/*
+ * An entry on a namespace's command resolution path.
+ */
+
+struct NamespacePathEntry {
+    Namespace *nsPtr;		/* What does this path entry point to? If it
+				 * is NULL, this path entry points is
+				 * redundant and should be skipped. */
+    Namespace *creatorNsPtr;	/* Where does this path entry point from? This
+				 * allows for efficient invalidation of
+				 * references when the path entry's target
+				 * updates its current list of defined
+				 * commands. */
+    NamespacePathEntry *prevPtr, *nextPtr;
+				/* Linked list pointers or NULL at either end
+				 * of the list that hangs off Namespace's
+				 * commandPathSourceList field. */
+};
+
+/*
+ * Flags used to represent the status of a namespace:
+ *
+ * NS_DYING -	1 means Tcl_DeleteNamespace has been called to delete the
+ *		namespace but there are still active call frames on the Tcl
+ *		stack that refer to the namespace. When the last call frame
+ *		referring to it has been popped, it's variables and command
+ *		will be destroyed and it will be marked "dead" (NS_DEAD). The
+ *		namespace can no longer be looked up by name.
+ * NS_DEAD -	1 means Tcl_DeleteNamespace has been called to delete the
+ *		namespace and no call frames still refer to it. Its variables
+ *		and command have already been destroyed. This bit allows the
+ *		namespace resolution code to recognize that the namespace is
+ *		"deleted". When the last namespaceName object in any byte code
+ *		unit that refers to the namespace has been freed (i.e., when
+ *		the namespace's refCount is 0), the namespace's storage will
+ *		be freed.
+ * NS_KILLED -	1 means that TclTeardownNamespace has already been called on
+ *		this namespace and it should not be called again [Bug 1355942]
+ * NS_SUPPRESS_COMPILATION -
+ *		Marks the commands in this namespace for not being compiled,
+ *		forcing them to be looked up every time.
+ */
+
+#define NS_DYING	0x01
+#define NS_DEAD		0x02
+#define NS_KILLED	0x04
+#define NS_SUPPRESS_COMPILATION	0x08
+
+/*
+ * Flags passed to TclGetNamespaceForQualName:
+ *
+ * TCL_GLOBAL_ONLY		- (see tcl.h) Look only in the global ns.
+ * TCL_NAMESPACE_ONLY		- (see tcl.h) Look only in the context ns.
+ * TCL_CREATE_NS_IF_UNKNOWN	- Create unknown namespaces.
+ * TCL_FIND_ONLY_NS		- The name sought is a namespace name.
+ */
+
+#define TCL_CREATE_NS_IF_UNKNOWN	0x800
+#define TCL_FIND_ONLY_NS		0x1000
+
+/*
+ * The client data for an ensemble command. This consists of the table of
+ * commands that are actually exported by the namespace, and an epoch counter
+ * that, combined with the exportLookupEpoch field of the namespace structure,
+ * defines whether the table contains valid data or will need to be recomputed
+ * next time the ensemble command is called.
+ */
+
+typedef struct EnsembleConfig {
+    Namespace *nsPtr;		/* The namespace backing this ensemble up. */
+    Tcl_Command token;		/* The token for the command that provides
+				 * ensemble support for the namespace, or NULL
+				 * if the command has been deleted (or never
+				 * existed; the global namespace never has an
+				 * ensemble command.) */
+    int epoch;			/* The epoch at which this ensemble's table of
+				 * exported commands is valid. */
+    char **subcommandArrayPtr;	/* Array of ensemble subcommand names. At all
+				 * consistent points, this will have the same
+				 * number of entries as there are entries in
+				 * the subcommandTable hash. */
+    Tcl_HashTable subcommandTable;
+				/* Hash table of ensemble subcommand names,
+				 * which are its keys so this also provides
+				 * the storage management for those subcommand
+				 * names. The contents of the entry values are
+				 * object version the prefix lists to use when
+				 * substituting for the command/subcommand to
+				 * build the ensemble implementation command.
+				 * Has to be stored here as well as in
+				 * subcommandDict because that field is NULL
+				 * when we are deriving the ensemble from the
+				 * namespace exports list. FUTURE WORK: use
+				 * object hash table here. */
+    struct EnsembleConfig *next;/* The next ensemble in the linked list of
+				 * ensembles associated with a namespace. If
+				 * this field points to this ensemble, the
+				 * structure has already been unlinked from
+				 * all lists, and cannot be found by scanning
+				 * the list from the namespace's ensemble
+				 * field. */
+    int flags;			/* ORed combo of TCL_ENSEMBLE_PREFIX,
+				 * ENSEMBLE_DEAD and ENSEMBLE_COMPILE. */
+
+    /* OBJECT FIELDS FOR ENSEMBLE CONFIGURATION */
+
+    Tcl_Obj *subcommandDict;	/* Dictionary providing mapping from
+				 * subcommands to their implementing command
+				 * prefixes, or NULL if we are to build the
+				 * map automatically from the namespace
+				 * exports. */
+    Tcl_Obj *subcmdList;	/* List of commands that this ensemble
+				 * actually provides, and whose implementation
+				 * will be built using the subcommandDict (if
+				 * present and defined) and by simple mapping
+				 * to the namespace otherwise. If NULL,
+				 * indicates that we are using the (dynamic)
+				 * list of currently exported commands. */
+    Tcl_Obj *unknownHandler;	/* Script prefix used to handle the case when
+				 * no match is found (according to the rule
+				 * defined by flag bit TCL_ENSEMBLE_PREFIX) or
+				 * NULL to use the default error-generating
+				 * behaviour. The script execution gets all
+				 * the arguments to the ensemble command
+				 * (including objv[0]) and will have the
+				 * results passed directly back to the caller
+				 * (including the error code) unless the code
+				 * is TCL_CONTINUE in which case the
+				 * subcommand will be reparsed by the ensemble
+				 * core, presumably because the ensemble
+				 * itself has been updated. */
+    Tcl_Obj *parameterList;	/* List of ensemble parameter names. */
+    int numParameters;		/* Cached number of parameters. This is either
+				 * 0 (if the parameterList field is NULL) or
+				 * the length of the list in the parameterList
+				 * field. */
+} EnsembleConfig;
+
+/*
+ * Various bits for the EnsembleConfig.flags field.
+ */
+
+#define ENSEMBLE_DEAD	0x1	/* Flag value to say that the ensemble is dead
+				 * and on its way out. */
+#define ENSEMBLE_COMPILE 0x4	/* Flag to enable bytecode compilation of an
+				 * ensemble. */
+
+/*
+ *----------------------------------------------------------------
+ * Data structures related to variables. These are used primarily in tclVar.c
+ *----------------------------------------------------------------
+ */
+
+/*
+ * The following structure defines a variable trace, which is used to invoke a
+ * specific C procedure whenever certain operations are performed on a
+ * variable.
+ */
+
+typedef struct VarTrace {
+    Tcl_VarTraceProc *traceProc;/* Procedure to call when operations given by
+				 * flags are performed on variable. */
+    ClientData clientData;	/* Argument to pass to proc. */
+    int flags;			/* What events the trace procedure is
+				 * interested in: OR-ed combination of
+				 * TCL_TRACE_READS, TCL_TRACE_WRITES,
+				 * TCL_TRACE_UNSETS and TCL_TRACE_ARRAY. */
+    struct VarTrace *nextPtr;	/* Next in list of traces associated with a
+				 * particular variable. */
+} VarTrace;
+
+/*
+ * The following structure defines a command trace, which is used to invoke a
+ * specific C procedure whenever certain operations are performed on a
+ * command.
+ */
+
+typedef struct CommandTrace {
+    Tcl_CommandTraceProc *traceProc;
+				/* Procedure to call when operations given by
+				 * flags are performed on command. */
+    ClientData clientData;	/* Argument to pass to proc. */
+    int flags;			/* What events the trace procedure is
+				 * interested in: OR-ed combination of
+				 * TCL_TRACE_RENAME, TCL_TRACE_DELETE. */
+    struct CommandTrace *nextPtr;
+				/* Next in list of traces associated with a
+				 * particular command. */
+    int refCount;		/* Used to ensure this structure is not
+				 * deleted too early. Keeps track of how many
+				 * pieces of code have a pointer to this
+				 * structure. */
+} CommandTrace;
+
+/*
+ * When a command trace is active (i.e. its associated procedure is executing)
+ * one of the following structures is linked into a list associated with the
+ * command's interpreter. The information in the structure is needed in order
+ * for Tcl to behave reasonably if traces are deleted while traces are active.
+ */
+
+typedef struct ActiveCommandTrace {
+    struct Command *cmdPtr;	/* Command that's being traced. */
+    struct ActiveCommandTrace *nextPtr;
+				/* Next in list of all active command traces
+				 * for the interpreter, or NULL if no more. */
+    CommandTrace *nextTracePtr;	/* Next trace to check after current trace
+				 * procedure returns; if this trace gets
+				 * deleted, must update pointer to avoid using
+				 * free'd memory. */
+    int reverseScan;		/* Boolean set true when traces are scanning
+				 * in reverse order. */
+} ActiveCommandTrace;
+
+/*
+ * When a variable trace is active (i.e. its associated procedure is
+ * executing) one of the following structures is linked into a list associated
+ * with the variable's interpreter. The information in the structure is needed
+ * in order for Tcl to behave reasonably if traces are deleted while traces
+ * are active.
+ */
+
+typedef struct ActiveVarTrace {
+    struct Var *varPtr;		/* Variable that's being traced. */
+    struct ActiveVarTrace *nextPtr;
+				/* Next in list of all active variable traces
+				 * for the interpreter, or NULL if no more. */
+    VarTrace *nextTracePtr;	/* Next trace to check after current trace
+				 * procedure returns; if this trace gets
+				 * deleted, must update pointer to avoid using
+				 * free'd memory. */
+} ActiveVarTrace;
+
+/*
+ * The structure below defines a variable, which associates a string name with
+ * a Tcl_Obj value. These structures are kept in procedure call frames (for
+ * local variables recognized by the compiler) or in the heap (for global
+ * variables and any variable not known to the compiler). For each Var
+ * structure in the heap, a hash table entry holds the variable name and a
+ * pointer to the Var structure.
+ */
+
+typedef struct Var {
+    int flags;			/* Miscellaneous bits of information about
+				 * variable. See below for definitions. */
+    union {
+	Tcl_Obj *objPtr;	/* The variable's object value. Used for
+				 * scalar variables and array elements. */
+	TclVarHashTable *tablePtr;/* For array variables, this points to
+				 * information about the hash table used to
+				 * implement the associative array. Points to
+				 * ckalloc-ed data. */
+	struct Var *linkPtr;	/* If this is a global variable being referred
+				 * to in a procedure, or a variable created by
+				 * "upvar", this field points to the
+				 * referenced variable's Var struct. */
+    } value;
+} Var;
+
+typedef struct VarInHash {
+    Var var;
+    int refCount;		/* Counts number of active uses of this
+				 * variable: 1 for the entry in the hash
+				 * table, 1 for each additional variable whose
+				 * linkPtr points here, 1 for each nested
+				 * trace active on variable, and 1 if the
+				 * variable is a namespace variable. This
+				 * record can't be deleted until refCount
+				 * becomes 0. */
+    Tcl_HashEntry entry;	/* The hash table entry that refers to this
+				 * variable. This is used to find the name of
+				 * the variable and to delete it from its
+				 * hashtable if it is no longer needed. It
+				 * also holds the variable's name. */
+} VarInHash;
+
+/*
+ * Flag bits for variables. The first two (VAR_ARRAY and VAR_LINK) are
+ * mutually exclusive and give the "type" of the variable. If none is set,
+ * this is a scalar variable.
+ *
+ * VAR_ARRAY -			1 means this is an array variable rather than
+ *				a scalar variable or link. The "tablePtr"
+ *				field points to the array's hashtable for its
+ *				elements.
+ * VAR_LINK -			1 means this Var structure contains a pointer
+ *				to another Var structure that either has the
+ *				real value or is itself another VAR_LINK
+ *				pointer. Variables like this come about
+ *				through "upvar" and "global" commands, or
+ *				through references to variables in enclosing
+ *				namespaces.
+ *
+ * Flags that indicate the type and status of storage; none is set for
+ * compiled local variables (Var structs).
+ *
+ * VAR_IN_HASHTABLE -		1 means this variable is in a hashtable and
+ *				the Var structure is malloced. 0 if it is a
+ *				local variable that was assigned a slot in a
+ *				procedure frame by the compiler so the Var
+ *				storage is part of the call frame.
+ * VAR_DEAD_HASH		1 means that this var's entry in the hashtable
+ *				has already been deleted.
+ * VAR_ARRAY_ELEMENT -		1 means that this variable is an array
+ *				element, so it is not legal for it to be an
+ *				array itself (the VAR_ARRAY flag had better
+ *				not be set).
+ * VAR_NAMESPACE_VAR -		1 means that this variable was declared as a
+ *				namespace variable. This flag ensures it
+ *				persists until its namespace is destroyed or
+ *				until the variable is unset; it will persist
+ *				even if it has not been initialized and is
+ *				marked undefined. The variable's refCount is
+ *				incremented to reflect the "reference" from
+ *				its namespace.
+ *
+ * Flag values relating to the variable's trace and search status.
+ *
+ * VAR_TRACED_READ
+ * VAR_TRACED_WRITE
+ * VAR_TRACED_UNSET
+ * VAR_TRACED_ARRAY
+ * VAR_TRACE_ACTIVE -		1 means that trace processing is currently
+ *				underway for a read or write access, so new
+ *				read or write accesses should not cause trace
+ *				procedures to be called and the variable can't
+ *				be deleted.
+ * VAR_SEARCH_ACTIVE
+ *
+ * The following additional flags are used with the CompiledLocal type defined
+ * below:
+ *
+ * VAR_ARGUMENT -		1 means that this variable holds a procedure
+ *				argument.
+ * VAR_TEMPORARY -		1 if the local variable is an anonymous
+ *				temporary variable. Temporaries have a NULL
+ *				name.
+ * VAR_RESOLVED -		1 if name resolution has been done for this
+ *				variable.
+ * VAR_IS_ARGS			1 if this variable is the last argument and is
+ *				named "args".
+ */
+
+/*
+ * FLAGS RENUMBERED: everything breaks already, make things simpler.
+ *
+ * IMPORTANT: skip the values 0x10, 0x20, 0x40, 0x800 corresponding to
+ * TCL_TRACE_(READS/WRITES/UNSETS/ARRAY): makes code simpler in tclTrace.c
+ *
+ * Keep the flag values for VAR_ARGUMENT and VAR_TEMPORARY so that old values
+ * in precompiled scripts keep working.
+ */
+
+/* Type of value (0 is scalar) */
+#define VAR_ARRAY		0x1
+#define VAR_LINK		0x2
+
+/* Type of storage (0 is compiled local) */
+#define VAR_IN_HASHTABLE	0x4
+#define VAR_DEAD_HASH		0x8
+#define VAR_ARRAY_ELEMENT	0x1000
+#define VAR_NAMESPACE_VAR	0x80	/* KEEP OLD VALUE for Itcl */
+
+#define VAR_ALL_HASH \
+	(VAR_IN_HASHTABLE|VAR_DEAD_HASH|VAR_NAMESPACE_VAR|VAR_ARRAY_ELEMENT)
+
+/* Trace and search state. */
+
+#define VAR_TRACED_READ		0x10	/* TCL_TRACE_READS */
+#define VAR_TRACED_WRITE	0x20	/* TCL_TRACE_WRITES */
+#define VAR_TRACED_UNSET	0x40	/* TCL_TRACE_UNSETS */
+#define VAR_TRACED_ARRAY	0x800	/* TCL_TRACE_ARRAY */
+#define VAR_TRACE_ACTIVE	0x2000
+#define VAR_SEARCH_ACTIVE	0x4000
+#define VAR_ALL_TRACES \
+	(VAR_TRACED_READ|VAR_TRACED_WRITE|VAR_TRACED_ARRAY|VAR_TRACED_UNSET)
+
+/* Special handling on initialisation (only CompiledLocal). */
+#define VAR_ARGUMENT		0x100	/* KEEP OLD VALUE! See tclProc.c */
+#define VAR_TEMPORARY		0x200	/* KEEP OLD VALUE! See tclProc.c */
+#define VAR_IS_ARGS		0x400
+#define VAR_RESOLVED		0x8000
+
+/*
+ * Macros to ensure that various flag bits are set properly for variables.
+ * The ANSI C "prototypes" for these macros are:
+ *
+ * MODULE_SCOPE void	TclSetVarScalar(Var *varPtr);
+ * MODULE_SCOPE void	TclSetVarArray(Var *varPtr);
+ * MODULE_SCOPE void	TclSetVarLink(Var *varPtr);
+ * MODULE_SCOPE void	TclSetVarArrayElement(Var *varPtr);
+ * MODULE_SCOPE void	TclSetVarUndefined(Var *varPtr);
+ * MODULE_SCOPE void	TclClearVarUndefined(Var *varPtr);
+ */
+
+#define TclSetVarScalar(varPtr) \
+    (varPtr)->flags &= ~(VAR_ARRAY|VAR_LINK)
+
+#define TclSetVarArray(varPtr) \
+    (varPtr)->flags = ((varPtr)->flags & ~VAR_LINK) | VAR_ARRAY
+
+#define TclSetVarLink(varPtr) \
+    (varPtr)->flags = ((varPtr)->flags & ~VAR_ARRAY) | VAR_LINK
+
+#define TclSetVarArrayElement(varPtr) \
+    (varPtr)->flags = ((varPtr)->flags & ~VAR_ARRAY) | VAR_ARRAY_ELEMENT
+
+#define TclSetVarUndefined(varPtr) \
+    (varPtr)->flags &= ~(VAR_ARRAY|VAR_LINK);\
+    (varPtr)->value.objPtr = NULL
+
+#define TclClearVarUndefined(varPtr)
+
+#define TclSetVarTraceActive(varPtr) \
+    (varPtr)->flags |= VAR_TRACE_ACTIVE
+
+#define TclClearVarTraceActive(varPtr) \
+    (varPtr)->flags &= ~VAR_TRACE_ACTIVE
+
+#define TclSetVarNamespaceVar(varPtr) \
+    if (!TclIsVarNamespaceVar(varPtr)) {\
+	(varPtr)->flags |= VAR_NAMESPACE_VAR;\
+	if (TclIsVarInHash(varPtr)) {\
+	    ((VarInHash *)(varPtr))->refCount++;\
+	}\
+    }
+
+#define TclClearVarNamespaceVar(varPtr) \
+    if (TclIsVarNamespaceVar(varPtr)) {\
+	(varPtr)->flags &= ~VAR_NAMESPACE_VAR;\
+	if (TclIsVarInHash(varPtr)) {\
+	    ((VarInHash *)(varPtr))->refCount--;\
+	}\
+    }
+
+/*
+ * Macros to read various flag bits of variables.
+ * The ANSI C "prototypes" for these macros are:
+ *
+ * MODULE_SCOPE int	TclIsVarScalar(Var *varPtr);
+ * MODULE_SCOPE int	TclIsVarLink(Var *varPtr);
+ * MODULE_SCOPE int	TclIsVarArray(Var *varPtr);
+ * MODULE_SCOPE int	TclIsVarUndefined(Var *varPtr);
+ * MODULE_SCOPE int	TclIsVarArrayElement(Var *varPtr);
+ * MODULE_SCOPE int	TclIsVarTemporary(Var *varPtr);
+ * MODULE_SCOPE int	TclIsVarArgument(Var *varPtr);
+ * MODULE_SCOPE int	TclIsVarResolved(Var *varPtr);
+ */
+
+#define TclIsVarScalar(varPtr) \
+    !((varPtr)->flags & (VAR_ARRAY|VAR_LINK))
+
+#define TclIsVarLink(varPtr) \
+    ((varPtr)->flags & VAR_LINK)
+
+#define TclIsVarArray(varPtr) \
+    ((varPtr)->flags & VAR_ARRAY)
+
+#define TclIsVarUndefined(varPtr) \
+    ((varPtr)->value.objPtr == NULL)
+
+#define TclIsVarArrayElement(varPtr) \
+    ((varPtr)->flags & VAR_ARRAY_ELEMENT)
+
+#define TclIsVarNamespaceVar(varPtr) \
+    ((varPtr)->flags & VAR_NAMESPACE_VAR)
+
+#define TclIsVarTemporary(varPtr) \
+    ((varPtr)->flags & VAR_TEMPORARY)
+
+#define TclIsVarArgument(varPtr) \
+    ((varPtr)->flags & VAR_ARGUMENT)
+
+#define TclIsVarResolved(varPtr) \
+    ((varPtr)->flags & VAR_RESOLVED)
+
+#define TclIsVarTraceActive(varPtr) \
+    ((varPtr)->flags & VAR_TRACE_ACTIVE)
+
+#define TclIsVarTraced(varPtr) \
+    ((varPtr)->flags & VAR_ALL_TRACES)
+
+#define TclIsVarInHash(varPtr) \
+    ((varPtr)->flags & VAR_IN_HASHTABLE)
+
+#define TclIsVarDeadHash(varPtr) \
+    ((varPtr)->flags & VAR_DEAD_HASH)
+
+#define TclGetVarNsPtr(varPtr) \
+    (TclIsVarInHash(varPtr) \
+	? ((TclVarHashTable *) ((((VarInHash *) (varPtr))->entry.tablePtr)))->nsPtr \
+	: NULL)
+
+#define VarHashRefCount(varPtr) \
+    ((VarInHash *) (varPtr))->refCount
+
+/*
+ * Macros for direct variable access by TEBC.
+ */
+
+#define TclIsVarDirectReadable(varPtr) \
+    (   !((varPtr)->flags & (VAR_ARRAY|VAR_LINK|VAR_TRACED_READ)) \
+    &&  (varPtr)->value.objPtr)
+
+#define TclIsVarDirectWritable(varPtr) \
+    !((varPtr)->flags & (VAR_ARRAY|VAR_LINK|VAR_TRACED_WRITE|VAR_DEAD_HASH))
+
+#define TclIsVarDirectUnsettable(varPtr) \
+    !((varPtr)->flags & (VAR_ARRAY|VAR_LINK|VAR_TRACED_READ|VAR_TRACED_WRITE|VAR_TRACED_UNSET|VAR_DEAD_HASH))
+
+#define TclIsVarDirectModifyable(varPtr) \
+    (   !((varPtr)->flags & (VAR_ARRAY|VAR_LINK|VAR_TRACED_READ|VAR_TRACED_WRITE)) \
+    &&  (varPtr)->value.objPtr)
+
+#define TclIsVarDirectReadable2(varPtr, arrayPtr) \
+    (TclIsVarDirectReadable(varPtr) &&\
+	(!(arrayPtr) || !((arrayPtr)->flags & VAR_TRACED_READ)))
+
+#define TclIsVarDirectWritable2(varPtr, arrayPtr) \
+    (TclIsVarDirectWritable(varPtr) &&\
+	(!(arrayPtr) || !((arrayPtr)->flags & VAR_TRACED_WRITE)))
+
+#define TclIsVarDirectModifyable2(varPtr, arrayPtr) \
+    (TclIsVarDirectModifyable(varPtr) &&\
+	(!(arrayPtr) || !((arrayPtr)->flags & (VAR_TRACED_READ|VAR_TRACED_WRITE))))
+
+/*
+ *----------------------------------------------------------------
+ * Data structures related to procedures. These are used primarily in
+ * tclProc.c, tclCompile.c, and tclExecute.c.
+ *----------------------------------------------------------------
+ */
+
+/*
+ * Forward declaration to prevent an error when the forward reference to
+ * Command is encountered in the Proc and ImportRef types declared below.
+ */
+
+struct Command;
+
+/*
+ * The variable-length structure below describes a local variable of a
+ * procedure that was recognized by the compiler. These variables have a name,
+ * an element in the array of compiler-assigned local variables in the
+ * procedure's call frame, and various other items of information. If the
+ * local variable is a formal argument, it may also have a default value. The
+ * compiler can't recognize local variables whose names are expressions (these
+ * names are only known at runtime when the expressions are evaluated) or
+ * local variables that are created as a result of an "upvar" or "uplevel"
+ * command. These other local variables are kept separately in a hash table in
+ * the call frame.
+ */
+
+typedef struct CompiledLocal {
+    struct CompiledLocal *nextPtr;
+				/* Next compiler-recognized local variable for
+				 * this procedure, or NULL if this is the last
+				 * local. */
+    int nameLength;		/* The number of characters in local
+				 * variable's name. Used to speed up variable
+				 * lookups. */
+    int frameIndex;		/* Index in the array of compiler-assigned
+				 * variables in the procedure call frame. */
+    int flags;			/* Flag bits for the local variable. Same as
+				 * the flags for the Var structure above,
+				 * although only VAR_ARGUMENT, VAR_TEMPORARY,
+				 * and VAR_RESOLVED make sense. */
+    Tcl_Obj *defValuePtr;	/* Pointer to the default value of an
+				 * argument, if any. NULL if not an argument
+				 * or, if an argument, no default value. */
+    Tcl_ResolvedVarInfo *resolveInfo;
+				/* Customized variable resolution info
+				 * supplied by the Tcl_ResolveCompiledVarProc
+				 * associated with a namespace. Each variable
+				 * is marked by a unique ClientData tag during
+				 * compilation, and that same tag is used to
+				 * find the variable at runtime. */
+    char name[1];		/* Name of the local variable starts here. If
+				 * the name is NULL, this will just be '\0'.
+				 * The actual size of this field will be large
+				 * enough to hold the name. MUST BE THE LAST
+				 * FIELD IN THE STRUCTURE! */
+} CompiledLocal;
+
+/*
+ * The structure below defines a command procedure, which consists of a
+ * collection of Tcl commands plus information about arguments and other local
+ * variables recognized at compile time.
+ */
+
+typedef struct Proc {
+    struct Interp *iPtr;	/* Interpreter for which this command is
+				 * defined. */
+    int refCount;		/* Reference count: 1 if still present in
+				 * command table plus 1 for each call to the
+				 * procedure that is currently active. This
+				 * structure can be freed when refCount
+				 * becomes zero. */
+    struct Command *cmdPtr;	/* Points to the Command structure for this
+				 * procedure. This is used to get the
+				 * namespace in which to execute the
+				 * procedure. */
+    Tcl_Obj *bodyPtr;		/* Points to the ByteCode object for
+				 * procedure's body command. */
+    int numArgs;		/* Number of formal parameters. */
+    int numCompiledLocals;	/* Count of local variables recognized by the
+				 * compiler including arguments and
+				 * temporaries. */
+    CompiledLocal *firstLocalPtr;
+				/* Pointer to first of the procedure's
+				 * compiler-allocated local variables, or NULL
+				 * if none. The first numArgs entries in this
+				 * list describe the procedure's formal
+				 * arguments. */
+    CompiledLocal *lastLocalPtr;/* Pointer to the last allocated local
+				 * variable or NULL if none. This has frame
+				 * index (numCompiledLocals-1). */
+} Proc;
+
+/*
+ * The type of functions called to process errors found during the execution
+ * of a procedure (or lambda term or ...).
+ */
+
+typedef void (ProcErrorProc)(Tcl_Interp *interp, Tcl_Obj *procNameObj);
+
+/*
+ * The structure below defines a command trace. This is used to allow Tcl
+ * clients to find out whenever a command is about to be executed.
+ */
+
+typedef struct Trace {
+    int level;			/* Only trace commands at nesting level less
+				 * than or equal to this. */
+    Tcl_CmdObjTraceProc *proc;	/* Procedure to call to trace command. */
+    ClientData clientData;	/* Arbitrary value to pass to proc. */
+    struct Trace *nextPtr;	/* Next in list of traces for this interp. */
+    int flags;			/* Flags governing the trace - see
+				 * Tcl_CreateObjTrace for details. */
+    Tcl_CmdObjTraceDeleteProc *delProc;
+				/* Procedure to call when trace is deleted. */
+} Trace;
+
+/*
+ * When an interpreter trace is active (i.e. its associated procedure is
+ * executing), one of the following structures is linked into a list
+ * associated with the interpreter. The information in the structure is needed
+ * in order for Tcl to behave reasonably if traces are deleted while traces
+ * are active.
+ */
+
+typedef struct ActiveInterpTrace {
+    struct ActiveInterpTrace *nextPtr;
+				/* Next in list of all active command traces
+				 * for the interpreter, or NULL if no more. */
+    Trace *nextTracePtr;	/* Next trace to check after current trace
+				 * procedure returns; if this trace gets
+				 * deleted, must update pointer to avoid using
+				 * free'd memory. */
+    int reverseScan;		/* Boolean set true when traces are scanning
+				 * in reverse order. */
+} ActiveInterpTrace;
+
+/*
+ * Flag values designating types of execution traces. See tclTrace.c for
+ * related flag values.
+ *
+ * TCL_TRACE_ENTER_EXEC		- triggers enter/enterstep traces.
+ * 				- passed to Tcl_CreateObjTrace to set up
+ *				  "enterstep" traces.
+ * TCL_TRACE_LEAVE_EXEC		- triggers leave/leavestep traces.
+ * 				- passed to Tcl_CreateObjTrace to set up
+ *				  "leavestep" traces.
+ */
+
+#define TCL_TRACE_ENTER_EXEC	1
+#define TCL_TRACE_LEAVE_EXEC	2
+
+/*
+ * The structure below defines an entry in the assocData hash table which is
+ * associated with an interpreter. The entry contains a pointer to a function
+ * to call when the interpreter is deleted, and a pointer to a user-defined
+ * piece of data.
+ */
+
+typedef struct AssocData {
+    Tcl_InterpDeleteProc *proc;	/* Proc to call when deleting. */
+    ClientData clientData;	/* Value to pass to proc. */
+} AssocData;
+
+/*
+ * The structure below defines a call frame. A call frame defines a naming
+ * context for a procedure call: its local naming scope (for local variables)
+ * and its global naming scope (a namespace, perhaps the global :: namespace).
+ * A call frame can also define the naming context for a namespace eval or
+ * namespace inscope command: the namespace in which the command's code should
+ * execute. The Tcl_CallFrame structures exist only while procedures or
+ * namespace eval/inscope's are being executed, and provide a kind of Tcl call
+ * stack.
+ *
+ * WARNING!! The structure definition must be kept consistent with the
+ * Tcl_CallFrame structure in tcl.h. If you change one, change the other.
+ */
+
+/*
+ * Will be grown to contain: pointers to the varnames (allocated at the end),
+ * plus the init values for each variable (suitable to be memcopied on init)
+ */
+
+typedef struct LocalCache {
+    int refCount;
+    int numVars;
+    Tcl_Obj *varName0;
+} LocalCache;
+
+#define localName(framePtr, i) \
+    ((&((framePtr)->localCachePtr->varName0))[(i)])
+
+MODULE_SCOPE void	TclFreeLocalCache(Tcl_Interp *interp,
+			    LocalCache *localCachePtr);
+
+typedef struct CallFrame {
+    Namespace *nsPtr;		/* Points to the namespace used to resolve
+				 * commands and global variables. */
+    int isProcCallFrame;	/* If 0, the frame was pushed to execute a
+				 * namespace command and var references are
+				 * treated as references to namespace vars;
+				 * varTablePtr and compiledLocals are ignored.
+				 * If FRAME_IS_PROC is set, the frame was
+				 * pushed to execute a Tcl procedure and may
+				 * have local vars. */
+    int objc;			/* This and objv below describe the arguments
+				 * for this procedure call. */
+    Tcl_Obj *const *objv;	/* Array of argument objects. */
+    struct CallFrame *callerPtr;
+				/* Value of interp->framePtr when this
+				 * procedure was invoked (i.e. next higher in
+				 * stack of all active procedures). */
+    struct CallFrame *callerVarPtr;
+				/* Value of interp->varFramePtr when this
+				 * procedure was invoked (i.e. determines
+				 * variable scoping within caller). Same as
+				 * callerPtr unless an "uplevel" command or
+				 * something equivalent was active in the
+				 * caller). */
+    int level;			/* Level of this procedure, for "uplevel"
+				 * purposes (i.e. corresponds to nesting of
+				 * callerVarPtr's, not callerPtr's). 1 for
+				 * outermost procedure, 0 for top-level. */
+    Proc *procPtr;		/* Points to the structure defining the called
+				 * procedure. Used to get information such as
+				 * the number of compiled local variables
+				 * (local variables assigned entries ["slots"]
+				 * in the compiledLocals array below). */
+    TclVarHashTable *varTablePtr;
+				/* Hash table containing local variables not
+				 * recognized by the compiler, or created at
+				 * execution time through, e.g., upvar.
+				 * Initially NULL and created if needed. */
+    int numCompiledLocals;	/* Count of local variables recognized by the
+				 * compiler including arguments. */
+    Var *compiledLocals;	/* Points to the array of local variables
+				 * recognized by the compiler. The compiler
+				 * emits code that refers to these variables
+				 * using an index into this array. */
+    ClientData clientData;	/* Pointer to some context that is used by
+				 * object systems. The meaning of the contents
+				 * of this field is defined by the code that
+				 * sets it, and it should only ever be set by
+				 * the code that is pushing the frame. In that
+				 * case, the code that sets it should also
+				 * have some means of discovering what the
+				 * meaning of the value is, which we do not
+				 * specify. */
+    LocalCache *localCachePtr;
+    Tcl_Obj    *tailcallPtr;
+				/* NULL if no tailcall is scheduled */
+} CallFrame;
+
+#define FRAME_IS_PROC	0x1
+#define FRAME_IS_LAMBDA 0x2
+#define FRAME_IS_METHOD	0x4	/* The frame is a method body, and the frame's
+				 * clientData field contains a CallContext
+				 * reference. Part of TIP#257. */
+#define FRAME_IS_OO_DEFINE 0x8	/* The frame is part of the inside workings of
+				 * the [oo::define] command; the clientData
+				 * field contains an Object reference that has
+				 * been confirmed to refer to a class. Part of
+				 * TIP#257. */
+
+/*
+ * TIP #280
+ * The structure below defines a command frame. A command frame provides
+ * location information for all commands executing a tcl script (source, eval,
+ * uplevel, procedure bodies, ...). The runtime structure essentially contains
+ * the stack trace as it would be if the currently executing command were to
+ * throw an error.
+ *
+ * For commands where it makes sense it refers to the associated CallFrame as
+ * well.
+ *
+ * The structures are chained in a single list, with the top of the stack
+ * anchored in the Interp structure.
+ *
+ * Instances can be allocated on the C stack, or the heap, the former making
+ * cleanup a bit simpler.
+ */
+
+typedef struct CmdFrame {
+    /*
+     * General data. Always available.
+     */
+
+    int type;			/* Values see below. */
+    int level;			/* Number of frames in stack, prevent O(n)
+				 * scan of list. */
+    int *line;			/* Lines the words of the command start on. */
+    int nline;
+    CallFrame *framePtr;	/* Procedure activation record, may be
+				 * NULL. */
+    struct CmdFrame *nextPtr;	/* Link to calling frame. */
+    /*
+     * Data needed for Eval vs TEBC
+     *
+     * EXECUTION CONTEXTS and usage of CmdFrame
+     *
+     * Field	  TEBC		  EvalEx
+     * =======	  ====		  ======
+     * level	  yes		  yes
+     * type	  BC/PREBC	  SRC/EVAL
+     * line0	  yes		  yes
+     * framePtr	  yes		  yes
+     * =======	  ====		  ======
+     *
+     * =======	  ====		  ========= union data
+     * line1	  -		  yes
+     * line3	  -		  yes
+     * path	  -		  yes
+     * -------	  ----		  ------
+     * codePtr	  yes		  -
+     * pc	  yes		  -
+     * =======	  ====		  ======
+     *
+     * =======	  ====		  ========= union cmd
+     * str.cmd	  yes		  yes
+     * str.len	  yes		  yes
+     * -------	  ----		  ------
+     */
+
+    union {
+	struct {
+	    Tcl_Obj *path;	/* Path of the sourced file the command is
+				 * in. */
+	} eval;
+	struct {
+	    const void *codePtr;/* Byte code currently executed... */
+	    const char *pc;	/* ... and instruction pointer. */
+	} tebc;
+    } data;
+    Tcl_Obj *cmdObj;
+    const char *cmd;		/* The executed command, if possible... */
+    int len;			/* ... and its length. */
+    const struct CFWordBC *litarg;
+				/* Link to set of literal arguments which have
+				 * ben pushed on the lineLABCPtr stack by
+				 * TclArgumentBCEnter(). These will be removed
+				 * by TclArgumentBCRelease. */
+} CmdFrame;
+
+typedef struct CFWord {
+    CmdFrame *framePtr;		/* CmdFrame to access. */
+    int word;			/* Index of the word in the command. */
+    int refCount;		/* Number of times the word is on the
+				 * stack. */
+} CFWord;
+
+typedef struct CFWordBC {
+    CmdFrame *framePtr;		/* CmdFrame to access. */
+    int pc;			/* Instruction pointer of a command in
+				 * ExtCmdLoc.loc[.] */
+    int word;			/* Index of word in
+				 * ExtCmdLoc.loc[cmd]->line[.] */
+    struct CFWordBC *prevPtr;	/* Previous entry in stack for same Tcl_Obj. */
+    struct CFWordBC *nextPtr;	/* Next entry for same command call. See
+				 * CmdFrame litarg field for the list start. */
+    Tcl_Obj *obj;		/* Back reference to hashtable key */
+} CFWordBC;
+
+/*
+ * Structure to record the locations of invisible continuation lines in
+ * literal scripts, as character offset from the beginning of the script. Both
+ * compiler and direct evaluator use this information to adjust their line
+ * counters when tracking through the script, because when it is invoked the
+ * continuation line marker as a whole has been removed already, meaning that
+ * the \n which was part of it is gone as well, breaking regular line
+ * tracking.
+ *
+ * These structures are allocated and filled by both the function
+ * TclSubstTokens() in the file "tclParse.c" and its caller TclEvalEx() in the
+ * file "tclBasic.c", and stored in the thread-global hashtable "lineCLPtr" in
+ * file "tclObj.c". They are used by the functions TclSetByteCodeFromAny() and
+ * TclCompileScript(), both found in the file "tclCompile.c". Their memory is
+ * released by the function TclFreeObj(), in the file "tclObj.c", and also by
+ * the function TclThreadFinalizeObjects(), in the same file.
+ */
+
+#define CLL_END		(-1)
+
+typedef struct ContLineLoc {
+    int num;			/* Number of entries in loc, not counting the
+				 * final -1 marker entry. */
+    int loc[1];			/* Table of locations, as character offsets.
+				 * The table is allocated as part of the
+				 * structure, extending behind the nominal end
+				 * of the structure. An entry containing the
+				 * value -1 is put after the last location, as
+				 * end-marker/sentinel. */
+} ContLineLoc;
+
+/*
+ * The following macros define the allowed values for the type field of the
+ * CmdFrame structure above. Some of the values occur only in the extended
+ * location data referenced via the 'baseLocPtr'.
+ *
+ * TCL_LOCATION_EVAL	  : Frame is for a script evaluated by EvalEx.
+ * TCL_LOCATION_BC	  : Frame is for bytecode.
+ * TCL_LOCATION_PREBC	  : Frame is for precompiled bytecode.
+ * TCL_LOCATION_SOURCE	  : Frame is for a script evaluated by EvalEx, from a
+ *			    sourced file.
+ * TCL_LOCATION_PROC	  : Frame is for bytecode of a procedure.
+ *
+ * A TCL_LOCATION_BC type in a frame can be overridden by _SOURCE and _PROC
+ * types, per the context of the byte code in execution.
+ */
+
+#define TCL_LOCATION_EVAL	(0) /* Location in a dynamic eval script. */
+#define TCL_LOCATION_BC		(2) /* Location in byte code. */
+#define TCL_LOCATION_PREBC	(3) /* Location in precompiled byte code, no
+				     * location. */
+#define TCL_LOCATION_SOURCE	(4) /* Location in a file. */
+#define TCL_LOCATION_PROC	(5) /* Location in a dynamic proc. */
+#define TCL_LOCATION_LAST	(6) /* Number of values in the enum. */
+
+/*
+ * Structure passed to describe procedure-like "procedures" that are not
+ * procedures (e.g. a lambda) so that their details can be reported correctly
+ * by [info frame]. Contains a sub-structure for each extra field.
+ */
+
+typedef Tcl_Obj * (GetFrameInfoValueProc)(ClientData clientData);
+typedef struct {
+    const char *name;		/* Name of this field. */
+    GetFrameInfoValueProc *proc;	/* Function to generate a Tcl_Obj* from the
+				 * clientData, or just use the clientData
+				 * directly (after casting) if NULL. */
+    ClientData clientData;	/* Context for above function, or Tcl_Obj* if
+				 * proc field is NULL. */
+} ExtraFrameInfoField;
+typedef struct {
+    int length;			/* Length of array. */
+    ExtraFrameInfoField fields[2];
+				/* Really as long as necessary, but this is
+				 * long enough for nearly anything. */
+} ExtraFrameInfo;
+
+/*
+ *----------------------------------------------------------------
+ * Data structures and procedures related to TclHandles, which are a very
+ * lightweight method of preserving enough information to determine if an
+ * arbitrary malloc'd block has been deleted.
+ *----------------------------------------------------------------
+ */
+
+typedef void **TclHandle;
+
+/*
+ *----------------------------------------------------------------
+ * Experimental flag value passed to Tcl_GetRegExpFromObj. Intended for use
+ * only by Expect. It will probably go away in a later release.
+ *----------------------------------------------------------------
+ */
+
+#define TCL_REG_BOSONLY 002000	/* Prepend \A to pattern so it only matches at
+				 * the beginning of the string. */
+
+/*
+ * These are a thin layer over TclpThreadKeyDataGet and TclpThreadKeyDataSet
+ * when threads are used, or an emulation if there are no threads. These are
+ * really internal and Tcl clients should use Tcl_GetThreadData.
+ */
+
+MODULE_SCOPE void *	TclThreadDataKeyGet(Tcl_ThreadDataKey *keyPtr);
+MODULE_SCOPE void	TclThreadDataKeySet(Tcl_ThreadDataKey *keyPtr,
+			    void *data);
+
+/*
+ * This is a convenience macro used to initialize a thread local storage ptr.
+ */
+
+#define TCL_TSD_INIT(keyPtr) \
+  (ThreadSpecificData *)Tcl_GetThreadData((keyPtr), sizeof(ThreadSpecificData))
+
+/*
+ *----------------------------------------------------------------
+ * Data structures related to bytecode compilation and execution. These are
+ * used primarily in tclCompile.c, tclExecute.c, and tclBasic.c.
+ *----------------------------------------------------------------
+ */
+
+/*
+ * Forward declaration to prevent errors when the forward references to
+ * Tcl_Parse and CompileEnv are encountered in the procedure type CompileProc
+ * declared below.
+ */
+
+struct CompileEnv;
+
+/*
+ * The type of procedures called by the Tcl bytecode compiler to compile
+ * commands. Pointers to these procedures are kept in the Command structure
+ * describing each command. The integer value returned by a CompileProc must
+ * be one of the following:
+ *
+ * TCL_OK		Compilation completed normally.
+ * TCL_ERROR 		Compilation could not be completed. This can be just a
+ * 			judgment by the CompileProc that the command is too
+ * 			complex to compile effectively, or it can indicate
+ * 			that in the current state of the interp, the command
+ * 			would raise an error. The bytecode compiler will not
+ * 			do any error reporting at compiler time. Error
+ * 			reporting is deferred until the actual runtime,
+ * 			because by then changes in the interp state may allow
+ * 			the command to be successfully evaluated.
+ * TCL_OUT_LINE_COMPILE	A source-compatible alias for TCL_ERROR, kept for the
+ * 			sake of old code only.
+ */
+
+#define TCL_OUT_LINE_COMPILE	TCL_ERROR
+
+typedef int (CompileProc)(Tcl_Interp *interp, Tcl_Parse *parsePtr,
+	struct Command *cmdPtr, struct CompileEnv *compEnvPtr);
+
+/*
+ * The type of procedure called from the compilation hook point in
+ * SetByteCodeFromAny.
+ */
+
+typedef int (CompileHookProc)(Tcl_Interp *interp,
+	struct CompileEnv *compEnvPtr, ClientData clientData);
+
+/*
+ * The data structure for a (linked list of) execution stacks.
+ */
+
+typedef struct ExecStack {
+    struct ExecStack *prevPtr;
+    struct ExecStack *nextPtr;
+    Tcl_Obj **markerPtr;
+    Tcl_Obj **endPtr;
+    Tcl_Obj **tosPtr;
+    Tcl_Obj *stackWords[1];
+} ExecStack;
+
+/*
+ * The data structure defining the execution environment for ByteCode's.
+ * There is one ExecEnv structure per Tcl interpreter. It holds the evaluation
+ * stack that holds command operands and results. The stack grows towards
+ * increasing addresses. The member stackPtr points to the stackItems of the
+ * currently active execution stack.
+ */
+
+typedef struct CorContext {
+    struct CallFrame *framePtr;
+    struct CallFrame *varFramePtr;
+    struct CmdFrame *cmdFramePtr;  /* See Interp.cmdFramePtr */
+    Tcl_HashTable *lineLABCPtr;    /* See Interp.lineLABCPtr */
+} CorContext;
+
+typedef struct CoroutineData {
+    struct Command *cmdPtr;	/* The command handle for the coroutine. */
+    struct ExecEnv *eePtr;	/* The special execution environment (stacks,
+				 * etc.) for the coroutine. */
+    struct ExecEnv *callerEEPtr;/* The execution environment for the caller of
+				 * the coroutine, which might be the
+				 * interpreter global environment or another
+				 * coroutine. */
+    CorContext caller;
+    CorContext running;
+    Tcl_HashTable *lineLABCPtr;    /* See Interp.lineLABCPtr */
+    void *stackLevel;
+    int auxNumLevels;		/* While the coroutine is running the
+				 * numLevels of the create/resume command is
+				 * stored here; for suspended coroutines it
+				 * holds the nesting numLevels at yield. */
+    int nargs;                  /* Number of args required for resuming this
+				 * coroutine; -2 means "0 or 1" (default), -1
+				 * means "any" */
+} CoroutineData;
+
+typedef struct ExecEnv {
+    ExecStack *execStackPtr;	/* Points to the first item in the evaluation
+				 * stack on the heap. */
+    Tcl_Obj *constants[2];	/* Pointers to constant "0" and "1" objs. */
+    struct Tcl_Interp *interp;
+    struct NRE_callback *callbackPtr;
+				/* Top callback in NRE's stack. */
+    struct CoroutineData *corPtr;
+    int rewind;
+} ExecEnv;
+
+#define COR_IS_SUSPENDED(corPtr) \
+    ((corPtr)->stackLevel == NULL)
+
+/*
+ * The definitions for the LiteralTable and LiteralEntry structures. Each
+ * interpreter contains a LiteralTable. It is used to reduce the storage
+ * needed for all the Tcl objects that hold the literals of scripts compiled
+ * by the interpreter. A literal's object is shared by all the ByteCodes that
+ * refer to the literal. Each distinct literal has one LiteralEntry entry in
+ * the LiteralTable. A literal table is a specialized hash table that is
+ * indexed by the literal's string representation, which may contain null
+ * characters.
+ *
+ * Note that we reduce the space needed for literals by sharing literal
+ * objects both within a ByteCode (each ByteCode contains a local
+ * LiteralTable) and across all an interpreter's ByteCodes (with the
+ * interpreter's global LiteralTable).
+ */
+
+typedef struct LiteralEntry {
+    struct LiteralEntry *nextPtr;
+				/* Points to next entry in this hash bucket or
+				 * NULL if end of chain. */
+    Tcl_Obj *objPtr;		/* Points to Tcl object that holds the
+				 * literal's bytes and length. */
+    int refCount;		/* If in an interpreter's global literal
+				 * table, the number of ByteCode structures
+				 * that share the literal object; the literal
+				 * entry can be freed when refCount drops to
+				 * 0. If in a local literal table, -1. */
+    Namespace *nsPtr;		/* Namespace in which this literal is used. We
+				 * try to avoid sharing literal non-FQ command
+				 * names among different namespaces to reduce
+				 * shimmering. */
+} LiteralEntry;
+
+typedef struct LiteralTable {
+    LiteralEntry **buckets;	/* Pointer to bucket array. Each element
+				 * points to first entry in bucket's hash
+				 * chain, or NULL. */
+    LiteralEntry *staticBuckets[TCL_SMALL_HASH_TABLE];
+				/* Bucket array used for small tables to avoid
+				 * mallocs and frees. */
+    int numBuckets;		/* Total number of buckets allocated at
+				 * **buckets. */
+    int numEntries;		/* Total number of entries present in
+				 * table. */
+    int rebuildSize;		/* Enlarge table when numEntries gets to be
+				 * this large. */
+    int mask;			/* Mask value used in hashing function. */
+} LiteralTable;
+
+/*
+ * The following structure defines for each Tcl interpreter various
+ * statistics-related information about the bytecode compiler and
+ * interpreter's operation in that interpreter.
+ */
+
+#ifdef TCL_COMPILE_STATS
+typedef struct ByteCodeStats {
+    long numExecutions;		/* Number of ByteCodes executed. */
+    long numCompilations;	/* Number of ByteCodes created. */
+    long numByteCodesFreed;	/* Number of ByteCodes destroyed. */
+    long instructionCount[256];	/* Number of times each instruction was
+				 * executed. */
+
+    double totalSrcBytes;	/* Total source bytes ever compiled. */
+    double totalByteCodeBytes;	/* Total bytes for all ByteCodes. */
+    double currentSrcBytes;	/* Src bytes for all current ByteCodes. */
+    double currentByteCodeBytes;/* Code bytes in all current ByteCodes. */
+
+    long srcCount[32];		/* Source size distribution: # of srcs of
+				 * size [2**(n-1)..2**n), n in [0..32). */
+    long byteCodeCount[32];	/* ByteCode size distribution. */
+    long lifetimeCount[32];	/* ByteCode lifetime distribution (ms). */
+
+    double currentInstBytes;	/* Instruction bytes-current ByteCodes. */
+    double currentLitBytes;	/* Current literal bytes. */
+    double currentExceptBytes;	/* Current exception table bytes. */
+    double currentAuxBytes;	/* Current auxiliary information bytes. */
+    double currentCmdMapBytes;	/* Current src<->code map bytes. */
+
+    long numLiteralsCreated;	/* Total literal objects ever compiled. */
+    double totalLitStringBytes;	/* Total string bytes in all literals. */
+    double currentLitStringBytes;
+				/* String bytes in current literals. */
+    long literalCount[32];	/* Distribution of literal string sizes. */
+} ByteCodeStats;
+#endif /* TCL_COMPILE_STATS */
+
+/*
+ * Structure used in implementation of those core ensembles which are
+ * partially compiled. Used as an array of these, with a terminating field
+ * whose 'name' is NULL.
+ */
+
+typedef struct {
+    const char *name;		/* The name of the subcommand. */
+    Tcl_ObjCmdProc *proc;	/* The implementation of the subcommand. */
+    CompileProc *compileProc;	/* The compiler for the subcommand. */
+    Tcl_ObjCmdProc *nreProc;	/* NRE implementation of this command. */
+    ClientData clientData;	/* Any clientData to give the command. */
+    int unsafe;			/* Whether this command is to be hidden by
+				 * default in a safe interpreter. */
+} EnsembleImplMap;
+
+/*
+ *----------------------------------------------------------------
+ * Data structures related to commands.
+ *----------------------------------------------------------------
+ */
+
+/*
+ * An imported command is created in an namespace when it imports a "real"
+ * command from another namespace. An imported command has a Command structure
+ * that points (via its ClientData value) to the "real" Command structure in
+ * the source namespace's command table. The real command records all the
+ * imported commands that refer to it in a list of ImportRef structures so
+ * that they can be deleted when the real command is deleted.
+ */
+
+typedef struct ImportRef {
+    struct Command *importedCmdPtr;
+				/* Points to the imported command created in
+				 * an importing namespace; this command
+				 * redirects its invocations to the "real"
+				 * command. */
+    struct ImportRef *nextPtr;	/* Next element on the linked list of imported
+				 * commands that refer to the "real" command.
+				 * The real command deletes these imported
+				 * commands on this list when it is
+				 * deleted. */
+} ImportRef;
+
+/*
+ * Data structure used as the ClientData of imported commands: commands
+ * created in an namespace when it imports a "real" command from another
+ * namespace.
+ */
+
+typedef struct ImportedCmdData {
+    struct Command *realCmdPtr;	/* "Real" command that this imported command
+				 * refers to. */
+    struct Command *selfPtr;	/* Pointer to this imported command. Needed
+				 * only when deleting it in order to remove it
+				 * from the real command's linked list of
+				 * imported commands that refer to it. */
+} ImportedCmdData;
+
+/*
+ * A Command structure exists for each command in a namespace. The Tcl_Command
+ * opaque type actually refers to these structures.
+ */
+
+typedef struct Command {
+    Tcl_HashEntry *hPtr;	/* Pointer to the hash table entry that refers
+				 * to this command. The hash table is either a
+				 * namespace's command table or an
+				 * interpreter's hidden command table. This
+				 * pointer is used to get a command's name
+				 * from its Tcl_Command handle. NULL means
+				 * that the hash table entry has been removed
+				 * already (this can happen if deleteProc
+				 * causes the command to be deleted or
+				 * recreated). */
+    Namespace *nsPtr;		/* Points to the namespace containing this
+				 * command. */
+    int refCount;		/* 1 if in command hashtable plus 1 for each
+				 * reference from a CmdName Tcl object
+				 * representing a command's name in a ByteCode
+				 * instruction sequence. This structure can be
+				 * freed when refCount becomes zero. */
+    int cmdEpoch;		/* Incremented to invalidate any references
+				 * that point to this command when it is
+				 * renamed, deleted, hidden, or exposed. */
+    CompileProc *compileProc;	/* Procedure called to compile command. NULL
+				 * if no compile proc exists for command. */
+    Tcl_ObjCmdProc *objProc;	/* Object-based command procedure. */
+    ClientData objClientData;	/* Arbitrary value passed to object proc. */
+    Tcl_CmdProc *proc;		/* String-based command procedure. */
+    ClientData clientData;	/* Arbitrary value passed to string proc. */
+    Tcl_CmdDeleteProc *deleteProc;
+				/* Procedure invoked when deleting command to,
+				 * e.g., free all client data. */
+    ClientData deleteData;	/* Arbitrary value passed to deleteProc. */
+    int flags;			/* Miscellaneous bits of information about
+				 * command. See below for definitions. */
+    ImportRef *importRefPtr;	/* List of each imported Command created in
+				 * another namespace when this command is
+				 * imported. These imported commands redirect
+				 * invocations back to this command. The list
+				 * is used to remove all those imported
+				 * commands when deleting this "real"
+				 * command. */
+    CommandTrace *tracePtr;	/* First in list of all traces set for this
+				 * command. */
+    Tcl_ObjCmdProc *nreProc;	/* NRE implementation of this command. */
+} Command;
+
+/*
+ * Flag bits for commands.
+ *
+ * CMD_IS_DELETED -		Means that the command is in the process of
+ *				being deleted (its deleteProc is currently
+ *				executing). Other attempts to delete the
+ *				command should be ignored.
+ * CMD_TRACE_ACTIVE -		1 means that trace processing is currently
+ *				underway for a rename/delete change. See the
+ *				two flags below for which is currently being
+ *				processed.
+ * CMD_HAS_EXEC_TRACES -	1 means that this command has at least one
+ *				execution trace (as opposed to simple
+ *				delete/rename traces) in its tracePtr list.
+ * CMD_COMPILES_EXPANDED -	1 means that this command has a compiler that
+ *				can handle expansion (provided it is not the
+ *				first word).
+ * TCL_TRACE_RENAME -		A rename trace is in progress. Further
+ *				recursive renames will not be traced.
+ * TCL_TRACE_DELETE -		A delete trace is in progress. Further
+ *				recursive deletes will not be traced.
+ * (these last two flags are defined in tcl.h)
+ */
+
+#define CMD_IS_DELETED		    0x01
+#define CMD_TRACE_ACTIVE	    0x02
+#define CMD_HAS_EXEC_TRACES	    0x04
+#define CMD_COMPILES_EXPANDED	    0x08
+#define CMD_REDEF_IN_PROGRESS	    0x10
+#define CMD_VIA_RESOLVER	    0x20
+
+
+/*
+ *----------------------------------------------------------------
+ * Data structures related to name resolution procedures.
+ *----------------------------------------------------------------
+ */
+
+/*
+ * The interpreter keeps a linked list of name resolution schemes. The scheme
+ * for a namespace is consulted first, followed by the list of schemes in an
+ * interpreter, followed by the default name resolution in Tcl. Schemes are
+ * added/removed from the interpreter's list by calling Tcl_AddInterpResolver
+ * and Tcl_RemoveInterpResolver.
+ */
+
+typedef struct ResolverScheme {
+    char *name;			/* Name identifying this scheme. */
+    Tcl_ResolveCmdProc *cmdResProc;
+				/* Procedure handling command name
+				 * resolution. */
+    Tcl_ResolveVarProc *varResProc;
+				/* Procedure handling variable name resolution
+				 * for variables that can only be handled at
+				 * runtime. */
+    Tcl_ResolveCompiledVarProc *compiledVarResProc;
+				/* Procedure handling variable name resolution
+				 * at compile time. */
+
+    struct ResolverScheme *nextPtr;
+				/* Pointer to next record in linked list. */
+} ResolverScheme;
+
+/*
+ * Forward declaration of the TIP#143 limit handler structure.
+ */
+
+typedef struct LimitHandler LimitHandler;
+
+/*
+ * TIP #268.
+ * Values for the selection mode, i.e the package require preferences.
+ */
+
+enum PkgPreferOptions {
+    PKG_PREFER_LATEST, PKG_PREFER_STABLE
+};
+
+/*
+ *----------------------------------------------------------------
+ * This structure shadows the first few fields of the memory cache for the
+ * allocator defined in tclThreadAlloc.c; it has to be kept in sync with the
+ * definition there.
+ * Some macros require knowledge of some fields in the struct in order to
+ * avoid hitting the TSD unnecessarily. In order to facilitate this, a pointer
+ * to the relevant fields is kept in the allocCache field in struct Interp.
+ *----------------------------------------------------------------
+ */
+
+typedef struct AllocCache {
+    struct Cache *nextPtr;	/* Linked list of cache entries. */
+    Tcl_ThreadId owner;		/* Which thread's cache is this? */
+    Tcl_Obj *firstObjPtr;	/* List of free objects for thread. */
+    int numObjects;		/* Number of objects for thread. */
+} AllocCache;
+
+/*
+ *----------------------------------------------------------------
+ * This structure defines an interpreter, which is a collection of commands
+ * plus other state information related to interpreting commands, such as
+ * variable storage. Primary responsibility for this data structure is in
+ * tclBasic.c, but almost every Tcl source file uses something in here.
+ *----------------------------------------------------------------
+ */
+
+typedef struct Interp {
+    /*
+     * Note: the first three fields must match exactly the fields in a
+     * Tcl_Interp struct (see tcl.h). If you change one, be sure to change the
+     * other.
+     *
+     * The interpreter's result is held in both the string and the
+     * objResultPtr fields. These fields hold, respectively, the result's
+     * string or object value. The interpreter's result is always in the
+     * result field if that is non-empty, otherwise it is in objResultPtr.
+     * The two fields are kept consistent unless some C code sets
+     * interp->result directly. Programs should not access result and
+     * objResultPtr directly; instead, they should always get and set the
+     * result using procedures such as Tcl_SetObjResult, Tcl_GetObjResult, and
+     * Tcl_GetStringResult. See the SetResult man page for details.
+     */
+
+    char *result;		/* If the last command returned a string
+				 * result, this points to it. Should not be
+				 * accessed directly; see comment above. */
+    Tcl_FreeProc *freeProc;	/* Zero means a string result is statically
+				 * allocated. TCL_DYNAMIC means string result
+				 * was allocated with ckalloc and should be
+				 * freed with ckfree. Other values give
+				 * address of procedure to invoke to free the
+				 * string result. Tcl_Eval must free it before
+				 * executing next command. */
+    int errorLine;		/* When TCL_ERROR is returned, this gives the
+				 * line number in the command where the error
+				 * occurred (1 means first line). */
+    const struct TclStubs *stubTable;
+				/* Pointer to the exported Tcl stub table. On
+				 * previous versions of Tcl this is a pointer
+				 * to the objResultPtr or a pointer to a
+				 * buckets array in a hash table. We therefore
+				 * have to do some careful checking before we
+				 * can use this. */
+
+    TclHandle handle;		/* Handle used to keep track of when this
+				 * interp is deleted. */
+
+    Namespace *globalNsPtr;	/* The interpreter's global namespace. */
+    Tcl_HashTable *hiddenCmdTablePtr;
+				/* Hash table used by tclBasic.c to keep track
+				 * of hidden commands on a per-interp
+				 * basis. */
+    ClientData interpInfo;	/* Information used by tclInterp.c to keep
+				 * track of master/slave interps on a
+				 * per-interp basis. */
+    union {
+	void (*optimizer)(void *envPtr);
+	Tcl_HashTable unused2;	/* No longer used (was mathFuncTable). The
+				 * unused space in interp was repurposed for
+				 * pluggable bytecode optimizers. The core
+				 * contains one optimizer, which can be
+				 * selectively overridden by extensions. */
+    } extra;
+
+    /*
+     * Information related to procedures and variables. See tclProc.c and
+     * tclVar.c for usage.
+     */
+
+    int numLevels;		/* Keeps track of how many nested calls to
+				 * Tcl_Eval are in progress for this
+				 * interpreter. It's used to delay deletion of
+				 * the table until all Tcl_Eval invocations
+				 * are completed. */
+    int maxNestingDepth;	/* If numLevels exceeds this value then Tcl
+				 * assumes that infinite recursion has
+				 * occurred and it generates an error. */
+    CallFrame *framePtr;	/* Points to top-most in stack of all nested
+				 * procedure invocations. */
+    CallFrame *varFramePtr;	/* Points to the call frame whose variables
+				 * are currently in use (same as framePtr
+				 * unless an "uplevel" command is
+				 * executing). */
+    ActiveVarTrace *activeVarTracePtr;
+				/* First in list of active traces for interp,
+				 * or NULL if no active traces. */
+    int returnCode;		/* [return -code] parameter. */
+    CallFrame *rootFramePtr;	/* Global frame pointer for this
+				 * interpreter. */
+    Namespace *lookupNsPtr;	/* Namespace to use ONLY on the next
+				 * TCL_EVAL_INVOKE call to Tcl_EvalObjv. */
+
+    /*
+     * Information used by Tcl_AppendResult to keep track of partial results.
+     * See Tcl_AppendResult code for details.
+     */
+
+    char *appendResult;		/* Storage space for results generated by
+				 * Tcl_AppendResult. Ckalloc-ed. NULL means
+				 * not yet allocated. */
+    int appendAvl;		/* Total amount of space available at
+				 * partialResult. */
+    int appendUsed;		/* Number of non-null bytes currently stored
+				 * at partialResult. */
+
+    /*
+     * Information about packages. Used only in tclPkg.c.
+     */
+
+    Tcl_HashTable packageTable;	/* Describes all of the packages loaded in or
+				 * available to this interpreter. Keys are
+				 * package names, values are (Package *)
+				 * pointers. */
+    char *packageUnknown;	/* Command to invoke during "package require"
+				 * commands for packages that aren't described
+				 * in packageTable. Ckalloc'ed, may be
+				 * NULL. */
+    /*
+     * Miscellaneous information:
+     */
+
+    int cmdCount;		/* Total number of times a command procedure
+				 * has been called for this interpreter. */
+    int evalFlags;		/* Flags to control next call to Tcl_Eval.
+				 * Normally zero, but may be set before
+				 * calling Tcl_Eval. See below for valid
+				 * values. */
+    int unused1;		/* No longer used (was termOffset) */
+    LiteralTable literalTable;	/* Contains LiteralEntry's describing all Tcl
+				 * objects holding literals of scripts
+				 * compiled by the interpreter. Indexed by the
+				 * string representations of literals. Used to
+				 * avoid creating duplicate objects. */
+    int compileEpoch;		/* Holds the current "compilation epoch" for
+				 * this interpreter. This is incremented to
+				 * invalidate existing ByteCodes when, e.g., a
+				 * command with a compile procedure is
+				 * redefined. */
+    Proc *compiledProcPtr;	/* If a procedure is being compiled, a pointer
+				 * to its Proc structure; otherwise, this is
+				 * NULL. Set by ObjInterpProc in tclProc.c and
+				 * used by tclCompile.c to process local
+				 * variables appropriately. */
+    ResolverScheme *resolverPtr;
+				/* Linked list of name resolution schemes
+				 * added to this interpreter. Schemes are
+				 * added and removed by calling
+				 * Tcl_AddInterpResolvers and
+				 * Tcl_RemoveInterpResolver respectively. */
+    Tcl_Obj *scriptFile;	/* NULL means there is no nested source
+				 * command active; otherwise this points to
+				 * pathPtr of the file being sourced. */
+    int flags;			/* Various flag bits. See below. */
+    long randSeed;		/* Seed used for rand() function. */
+    Trace *tracePtr;		/* List of traces for this interpreter. */
+    Tcl_HashTable *assocData;	/* Hash table for associating data with this
+				 * interpreter. Cleaned up when this
+				 * interpreter is deleted. */
+    struct ExecEnv *execEnvPtr;	/* Execution environment for Tcl bytecode
+				 * execution. Contains a pointer to the Tcl
+				 * evaluation stack. */
+    Tcl_Obj *emptyObjPtr;	/* Points to an object holding an empty
+				 * string. Returned by Tcl_ObjSetVar2 when
+				 * variable traces change a variable in a
+				 * gross way. */
+    char resultSpace[TCL_RESULT_SIZE+1];
+				/* Static space holding small results. */
+    Tcl_Obj *objResultPtr;	/* If the last command returned an object
+				 * result, this points to it. Should not be
+				 * accessed directly; see comment above. */
+    Tcl_ThreadId threadId;	/* ID of thread that owns the interpreter. */
+
+    ActiveCommandTrace *activeCmdTracePtr;
+				/* First in list of active command traces for
+				 * interp, or NULL if no active traces. */
+    ActiveInterpTrace *activeInterpTracePtr;
+				/* First in list of active traces for interp,
+				 * or NULL if no active traces. */
+
+    int tracesForbiddingInline;	/* Count of traces (in the list headed by
+				 * tracePtr) that forbid inline bytecode
+				 * compilation. */
+
+    /*
+     * Fields used to manage extensible return options (TIP 90).
+     */
+
+    Tcl_Obj *returnOpts;	/* A dictionary holding the options to the
+				 * last [return] command. */
+
+    Tcl_Obj *errorInfo;		/* errorInfo value (now as a Tcl_Obj). */
+    Tcl_Obj *eiVar;		/* cached ref to ::errorInfo variable. */
+    Tcl_Obj *errorCode;		/* errorCode value (now as a Tcl_Obj). */
+    Tcl_Obj *ecVar;		/* cached ref to ::errorInfo variable. */
+    int returnLevel;		/* [return -level] parameter. */
+
+    /*
+     * Resource limiting framework support (TIP#143).
+     */
+
+    struct {
+	int active;		/* Flag values defining which limits have been
+				 * set. */
+	int granularityTicker;	/* Counter used to determine how often to
+				 * check the limits. */
+	int exceeded;		/* Which limits have been exceeded, described
+				 * as flag values the same as the 'active'
+				 * field. */
+
+	int cmdCount;		/* Limit for how many commands to execute in
+				 * the interpreter. */
+	LimitHandler *cmdHandlers;
+				/* Handlers to execute when the limit is
+				 * reached. */
+	int cmdGranularity;	/* Mod factor used to determine how often to
+				 * evaluate the limit check. */
+
+	Tcl_Time time;		/* Time limit for execution within the
+				 * interpreter. */
+	LimitHandler *timeHandlers;
+				/* Handlers to execute when the limit is
+				 * reached. */
+	int timeGranularity;	/* Mod factor used to determine how often to
+				 * evaluate the limit check. */
+	Tcl_TimerToken timeEvent;
+				/* Handle for a timer callback that will occur
+				 * when the time-limit is exceeded. */
+
+	Tcl_HashTable callbacks;/* Mapping from (interp,type) pair to data
+				 * used to install a limit handler callback to
+				 * run in _this_ interp when the limit is
+				 * exceeded. */
+    } limit;
+
+    /*
+     * Information for improved default error generation from ensembles
+     * (TIP#112).
+     */
+
+    struct {
+	Tcl_Obj *const *sourceObjs;
+				/* What arguments were actually input into the
+				 * *root* ensemble command? (Nested ensembles
+				 * don't rewrite this.) NULL if we're not
+				 * processing an ensemble. */
+	int numRemovedObjs;	/* How many arguments have been stripped off
+				 * because of ensemble processing. */
+	int numInsertedObjs;	/* How many of the current arguments were
+				 * inserted by an ensemble. */
+    } ensembleRewrite;
+
+    /*
+     * TIP #219: Global info for the I/O system.
+     */
+
+    Tcl_Obj *chanMsg;		/* Error message set by channel drivers, for
+				 * the propagation of arbitrary Tcl errors.
+				 * This information, if present (chanMsg not
+				 * NULL), takes precedence over a POSIX error
+				 * code returned by a channel operation. */
+
+    /*
+     * Source code origin information (TIP #280).
+     */
+
+    CmdFrame *cmdFramePtr;	/* Points to the command frame containing the
+				 * location information for the current
+				 * command. */
+    const CmdFrame *invokeCmdFramePtr;
+				/* Points to the command frame which is the
+				 * invoking context of the bytecode compiler.
+				 * NULL when the byte code compiler is not
+				 * active. */
+    int invokeWord;		/* Index of the word in the command which
+				 * is getting compiled. */
+    Tcl_HashTable *linePBodyPtr;/* This table remembers for each statically
+				 * defined procedure the location information
+				 * for its body. It is keyed by the address of
+				 * the Proc structure for a procedure. The
+				 * values are "struct CmdFrame*". */
+    Tcl_HashTable *lineBCPtr;	/* This table remembers for each ByteCode
+				 * object the location information for its
+				 * body. It is keyed by the address of the
+				 * Proc structure for a procedure. The values
+				 * are "struct ExtCmdLoc*". (See
+				 * tclCompile.h) */
+    Tcl_HashTable *lineLABCPtr;
+    Tcl_HashTable *lineLAPtr;	/* This table remembers for each argument of a
+				 * command on the execution stack the index of
+				 * the argument in the command, and the
+				 * location data of the command. It is keyed
+				 * by the address of the Tcl_Obj containing
+				 * the argument. The values are "struct
+				 * CFWord*" (See tclBasic.c). This allows
+				 * commands like uplevel, eval, etc. to find
+				 * location information for their arguments,
+				 * if they are a proper literal argument to an
+				 * invoking command. Alt view: An index to the
+				 * CmdFrame stack keyed by command argument
+				 * holders. */
+    ContLineLoc *scriptCLLocPtr;/* This table points to the location data for
+				 * invisible continuation lines in the script,
+				 * if any. This pointer is set by the function
+				 * TclEvalObjEx() in file "tclBasic.c", and
+				 * used by function ...() in the same file.
+				 * It does for the eval/direct path of script
+				 * execution what CompileEnv.clLoc does for
+				 * the bytecode compiler.
+				 */
+    /*
+     * TIP #268. The currently active selection mode, i.e. the package require
+     * preferences.
+     */
+
+    int packagePrefer;		/* Current package selection mode. */
+
+    /*
+     * Hashtables for variable traces and searches.
+     */
+
+    Tcl_HashTable varTraces;	/* Hashtable holding the start of a variable's
+				 * active trace list; varPtr is the key. */
+    Tcl_HashTable varSearches;	/* Hashtable holding the start of a variable's
+				 * active searches list; varPtr is the key. */
+    /*
+     * The thread-specific data ekeko: cache pointers or values that
+     *  (a) do not change during the thread's lifetime
+     *  (b) require access to TSD to determine at runtime
+     *  (c) are accessed very often (e.g., at each command call)
+     *
+     * Note that these are the same for all interps in the same thread. They
+     * just have to be initialised for the thread's master interp, slaves
+     * inherit the value.
+     *
+     * They are used by the macros defined below.
+     */
+
+    AllocCache *allocCache;
+    void *pendingObjDataPtr;	/* Pointer to the Cache and PendingObjData
+				 * structs for this interp's thread; see
+				 * tclObj.c and tclThreadAlloc.c */
+    int *asyncReadyPtr;		/* Pointer to the asyncReady indicator for
+				 * this interp's thread; see tclAsync.c */
+    /*
+     * The pointer to the object system root ekeko. c.f. TIP #257.
+     */
+    void *objectFoundation;	/* Pointer to the Foundation structure of the
+				 * object system, which contains things like
+				 * references to key namespaces. See
+				 * tclOOInt.h and tclOO.c for real definition
+				 * and setup. */
+
+    struct NRE_callback *deferredCallbacks;
+				/* Callbacks that are set previous to a call
+				 * to some Eval function but that actually
+				 * belong to the command that is about to be
+				 * called - i.e., they should be run *before*
+				 * any tailcall is invoked. */
+
+    /*
+     * TIP #285, Script cancellation support.
+     */
+
+    Tcl_AsyncHandler asyncCancel;
+				/* Async handler token for Tcl_CancelEval. */
+    Tcl_Obj *asyncCancelMsg;	/* Error message set by async cancel handler
+				 * for the propagation of arbitrary Tcl
+				 * errors. This information, if present
+				 * (asyncCancelMsg not NULL), takes precedence
+				 * over the default error messages returned by
+				 * a script cancellation operation. */
+
+	/*
+	 * TIP #348 IMPLEMENTATION  -  Substituted error stack
+	 */
+    Tcl_Obj *errorStack;	/* [info errorstack] value (as a Tcl_Obj). */
+    Tcl_Obj *upLiteral;		/* "UP" literal for [info errorstack] */
+    Tcl_Obj *callLiteral;	/* "CALL" literal for [info errorstack] */
+    Tcl_Obj *innerLiteral;	/* "INNER" literal for [info errorstack] */
+    Tcl_Obj *innerContext;	/* cached list for fast reallocation */
+    int resetErrorStack;        /* controls cleaning up of ::errorStack */
+
+#ifdef TCL_COMPILE_STATS
+    /*
+     * Statistical information about the bytecode compiler and interpreter's
+     * operation. This should be the last field of Interp.
+     */
+
+    ByteCodeStats stats;	/* Holds compilation and execution statistics
+				 * for this interpreter. */
+#endif /* TCL_COMPILE_STATS */
+} Interp;
+
+/*
+ * Macros that use the TSD-ekeko.
+ */
+
+#define TclAsyncReady(iPtr) \
+    *((iPtr)->asyncReadyPtr)
+
+/*
+ * Macros for script cancellation support (TIP #285).
+ */
+
+#define TclCanceled(iPtr) \
+    (((iPtr)->flags & CANCELED) || ((iPtr)->flags & TCL_CANCEL_UNWIND))
+
+#define TclSetCancelFlags(iPtr, cancelFlags)   \
+    (iPtr)->flags |= CANCELED;                 \
+    if ((cancelFlags) & TCL_CANCEL_UNWIND) {   \
+        (iPtr)->flags |= TCL_CANCEL_UNWIND;    \
+    }
+
+#define TclUnsetCancelFlags(iPtr) \
+    (iPtr)->flags &= (~(CANCELED | TCL_CANCEL_UNWIND))
+
+/*
+ * Macros for splicing into and out of doubly linked lists. They assume
+ * existence of struct items 'prevPtr' and 'nextPtr'.
+ *
+ * a = element to add or remove.
+ * b = list head.
+ *
+ * TclSpliceIn adds to the head of the list.
+ */
+
+#define TclSpliceIn(a,b)			\
+    (a)->nextPtr = (b);				\
+    if ((b) != NULL) {				\
+	(b)->prevPtr = (a);			\
+    }						\
+    (a)->prevPtr = NULL, (b) = (a);
+
+#define TclSpliceOut(a,b)			\
+    if ((a)->prevPtr != NULL) {			\
+	(a)->prevPtr->nextPtr = (a)->nextPtr;	\
+    } else {					\
+	(b) = (a)->nextPtr;			\
+    }						\
+    if ((a)->nextPtr != NULL) {			\
+	(a)->nextPtr->prevPtr = (a)->prevPtr;	\
+    }
+
+/*
+ * EvalFlag bits for Interp structures:
+ *
+ * TCL_ALLOW_EXCEPTIONS	1 means it's OK for the script to terminate with a
+ *			code other than TCL_OK or TCL_ERROR; 0 means codes
+ *			other than these should be turned into errors.
+ */
+
+#define TCL_ALLOW_EXCEPTIONS		0x04
+#define TCL_EVAL_FILE			0x02
+#define TCL_EVAL_SOURCE_IN_FRAME	0x10
+#define TCL_EVAL_NORESOLVE		0x20
+
+/*
+ * Flag bits for Interp structures:
+ *
+ * DELETED:		Non-zero means the interpreter has been deleted:
+ *			don't process any more commands for it, and destroy
+ *			the structure as soon as all nested invocations of
+ *			Tcl_Eval are done.
+ * ERR_ALREADY_LOGGED:	Non-zero means information has already been logged in
+ *			iPtr->errorInfo for the current Tcl_Eval instance, so
+ *			Tcl_Eval needn't log it (used to implement the "error
+ *			message log" command).
+ * DONT_COMPILE_CMDS_INLINE: Non-zero means that the bytecode compiler should
+ *			not compile any commands into an inline sequence of
+ *			instructions. This is set 1, for example, when command
+ *			traces are requested.
+ * RAND_SEED_INITIALIZED: Non-zero means that the randSeed value of the interp
+ *			has not be initialized. This is set 1 when we first
+ *			use the rand() or srand() functions.
+ * SAFE_INTERP:		Non zero means that the current interp is a safe
+ *			interp (i.e. it has only the safe commands installed,
+ *			less privilege than a regular interp).
+ * INTERP_DEBUG_FRAME:	Used for switching on various extra interpreter
+ *			debug/info mechanisms (e.g. info frame eval/uplevel
+ *			tracing) which are performance intensive.
+ * INTERP_TRACE_IN_PROGRESS: Non-zero means that an interp trace is currently
+ *			active; so no further trace callbacks should be
+ *			invoked.
+ * INTERP_ALTERNATE_WRONG_ARGS: Used for listing second and subsequent forms
+ *			of the wrong-num-args string in Tcl_WrongNumArgs.
+ *			Makes it append instead of replacing and uses
+ *			different intermediate text.
+ * CANCELED:		Non-zero means that the script in progress should be
+ *			canceled as soon as possible. This can be checked by
+ *			extensions (and the core itself) by calling
+ *			Tcl_Canceled and checking if TCL_ERROR is returned.
+ *			This is a one-shot flag that is reset immediately upon
+ *			being detected; however, if the TCL_CANCEL_UNWIND flag
+ *			is set Tcl_Canceled will continue to report that the
+ *			script in progress has been canceled thereby allowing
+ *			the evaluation stack for the interp to be fully
+ *			unwound.
+ *
+ * WARNING: For the sake of some extensions that have made use of former
+ * internal values, do not re-use the flag values 2 (formerly ERR_IN_PROGRESS)
+ * or 8 (formerly ERROR_CODE_SET).
+ */
+
+#define DELETED				     1
+#define ERR_ALREADY_LOGGED		     4
+#define INTERP_DEBUG_FRAME		  0x10
+#define DONT_COMPILE_CMDS_INLINE	  0x20
+#define RAND_SEED_INITIALIZED		  0x40
+#define SAFE_INTERP			  0x80
+#define INTERP_TRACE_IN_PROGRESS	 0x200
+#define INTERP_ALTERNATE_WRONG_ARGS	 0x400
+#define ERR_LEGACY_COPY			 0x800
+#define CANCELED			0x1000
+
+/*
+ * Maximum number of levels of nesting permitted in Tcl commands (used to
+ * catch infinite recursion).
+ */
+
+#define MAX_NESTING_DEPTH	1000
+
+/*
+ * The macro below is used to modify a "char" value (e.g. by casting it to an
+ * unsigned character) so that it can be used safely with macros such as
+ * isspace.
+ */
+
+#define UCHAR(c) ((unsigned char) (c))
+
+/*
+ * This macro is used to properly align the memory allocated by Tcl, giving
+ * the same alignment as the native malloc.
+ */
+
+#if defined(__APPLE__)
+#define TCL_ALLOCALIGN	16
+#else
+#define TCL_ALLOCALIGN	(2*sizeof(void *))
+#endif
+
+/*
+ * This macro is used to determine the offset needed to safely allocate any
+ * data structure in memory. Given a starting offset or size, it "rounds up"
+ * or "aligns" the offset to the next 8-byte boundary so that any data
+ * structure can be placed at the resulting offset without fear of an
+ * alignment error.
+ *
+ * WARNING!! DO NOT USE THIS MACRO TO ALIGN POINTERS: it will produce the
+ * wrong result on platforms that allocate addresses that are divisible by 4
+ * or 2. Only use it for offsets or sizes.
+ *
+ * This macro is only used by tclCompile.c in the core (Bug 926445). It
+ * however not be made file static, as extensions that touch bytecodes
+ * (notably tbcload) require it.
+ */
+
+#define TCL_ALIGN(x) (((int)(x) + 7) & ~7)
+
+/*
+ * The following enum values are used to specify the runtime platform setting
+ * of the tclPlatform variable.
+ */
+
+typedef enum {
+    TCL_PLATFORM_UNIX = 0,	/* Any Unix-like OS. */
+    TCL_PLATFORM_WINDOWS = 2	/* Any Microsoft Windows OS. */
+} TclPlatformType;
+
+/*
+ * The following enum values are used to indicate the translation of a Tcl
+ * channel. Declared here so that each platform can define
+ * TCL_PLATFORM_TRANSLATION to the native translation on that platform.
+ */
+
+typedef enum TclEolTranslation {
+    TCL_TRANSLATE_AUTO,		/* Eol == \r, \n and \r\n. */
+    TCL_TRANSLATE_CR,		/* Eol == \r. */
+    TCL_TRANSLATE_LF,		/* Eol == \n. */
+    TCL_TRANSLATE_CRLF		/* Eol == \r\n. */
+} TclEolTranslation;
+
+/*
+ * Flags for TclInvoke:
+ *
+ * TCL_INVOKE_HIDDEN		Invoke a hidden command; if not set, invokes
+ *				an exposed command.
+ * TCL_INVOKE_NO_UNKNOWN	If set, "unknown" is not invoked if the
+ *				command to be invoked is not found. Only has
+ *				an effect if invoking an exposed command,
+ *				i.e. if TCL_INVOKE_HIDDEN is not also set.
+ * TCL_INVOKE_NO_TRACEBACK	Does not record traceback information if the
+ *				invoked command returns an error. Used if the
+ *				caller plans on recording its own traceback
+ *				information.
+ */
+
+#define	TCL_INVOKE_HIDDEN	(1<<0)
+#define TCL_INVOKE_NO_UNKNOWN	(1<<1)
+#define TCL_INVOKE_NO_TRACEBACK	(1<<2)
+
+/*
+ * The structure used as the internal representation of Tcl list objects. This
+ * struct is grown (reallocated and copied) as necessary to hold all the
+ * list's element pointers. The struct might contain more slots than currently
+ * used to hold all element pointers. This is done to make append operations
+ * faster.
+ */
+
+typedef struct List {
+    int refCount;
+    int maxElemCount;		/* Total number of element array slots. */
+    int elemCount;		/* Current number of list elements. */
+    int canonicalFlag;		/* Set if the string representation was
+				 * derived from the list representation. May
+				 * be ignored if there is no string rep at
+				 * all.*/
+    Tcl_Obj *elements;		/* First list element; the struct is grown to
+				 * accommodate all elements. */
+} List;
+
+#define LIST_MAX \
+	(1 + (int)(((size_t)UINT_MAX - sizeof(List))/sizeof(Tcl_Obj *)))
+#define LIST_SIZE(numElems) \
+	(unsigned)(sizeof(List) + (((numElems) - 1) * sizeof(Tcl_Obj *)))
+
+/*
+ * Macro used to get the elements of a list object.
+ */
+
+#define ListRepPtr(listPtr) \
+    ((List *) (listPtr)->internalRep.twoPtrValue.ptr1)
+
+#define ListSetIntRep(objPtr, listRepPtr) \
+    (objPtr)->internalRep.twoPtrValue.ptr1 = (void *)(listRepPtr), \
+    (objPtr)->internalRep.twoPtrValue.ptr2 = NULL, \
+    (listRepPtr)->refCount++, \
+    (objPtr)->typePtr = &tclListType
+
+#define ListObjGetElements(listPtr, objc, objv) \
+    ((objv) = &(ListRepPtr(listPtr)->elements), \
+     (objc) = ListRepPtr(listPtr)->elemCount)
+
+#define ListObjLength(listPtr, len) \
+    ((len) = ListRepPtr(listPtr)->elemCount)
+
+#define ListObjIsCanonical(listPtr) \
+    (((listPtr)->bytes == NULL) || ListRepPtr(listPtr)->canonicalFlag)
+
+#define TclListObjGetElements(interp, listPtr, objcPtr, objvPtr) \
+    (((listPtr)->typePtr == &tclListType) \
+	    ? ((ListObjGetElements((listPtr), *(objcPtr), *(objvPtr))), TCL_OK)\
+	    : Tcl_ListObjGetElements((interp), (listPtr), (objcPtr), (objvPtr)))
+
+#define TclListObjLength(interp, listPtr, lenPtr) \
+    (((listPtr)->typePtr == &tclListType) \
+	    ? ((ListObjLength((listPtr), *(lenPtr))), TCL_OK)\
+	    : Tcl_ListObjLength((interp), (listPtr), (lenPtr)))
+
+#define TclListObjIsCanonical(listPtr) \
+    (((listPtr)->typePtr == &tclListType) ? ListObjIsCanonical((listPtr)) : 0)
+
+/*
+ * Modes for collecting (or not) in the implementations of TclNRForeachCmd,
+ * TclNRLmapCmd and their compilations.
+ */
+
+#define TCL_EACH_KEEP_NONE  0	/* Discard iteration result like [foreach] */
+#define TCL_EACH_COLLECT    1	/* Collect iteration result like [lmap] */
+
+/*
+ * Macros providing a faster path to integers: Tcl_GetLongFromObj,
+ * Tcl_GetIntFromObj and TclGetIntForIndex.
+ *
+ * WARNING: these macros eval their args more than once.
+ */
+
+#define TclGetLongFromObj(interp, objPtr, longPtr) \
+    (((objPtr)->typePtr == &tclIntType)	\
+	    ? ((*(longPtr) = (objPtr)->internalRep.longValue), TCL_OK) \
+	    : Tcl_GetLongFromObj((interp), (objPtr), (longPtr)))
+
+#if (LONG_MAX == INT_MAX)
+#define TclGetIntFromObj(interp, objPtr, intPtr) \
+    (((objPtr)->typePtr == &tclIntType)	\
+	    ? ((*(intPtr) = (objPtr)->internalRep.longValue), TCL_OK) \
+	    : Tcl_GetIntFromObj((interp), (objPtr), (intPtr)))
+#define TclGetIntForIndexM(interp, objPtr, endValue, idxPtr) \
+    (((objPtr)->typePtr == &tclIntType)	\
+	    ? ((*(idxPtr) = (objPtr)->internalRep.longValue), TCL_OK) \
+	    : TclGetIntForIndex((interp), (objPtr), (endValue), (idxPtr)))
+#else
+#define TclGetIntFromObj(interp, objPtr, intPtr) \
+    (((objPtr)->typePtr == &tclIntType \
+	    && (objPtr)->internalRep.longValue >= -(Tcl_WideInt)(UINT_MAX) \
+	    && (objPtr)->internalRep.longValue <= (Tcl_WideInt)(UINT_MAX))	\
+	    ? ((*(intPtr) = (objPtr)->internalRep.longValue), TCL_OK) \
+	    : Tcl_GetIntFromObj((interp), (objPtr), (intPtr)))
+#define TclGetIntForIndexM(interp, objPtr, endValue, idxPtr) \
+    (((objPtr)->typePtr == &tclIntType \
+	    && (objPtr)->internalRep.longValue >= INT_MIN \
+	    && (objPtr)->internalRep.longValue <= INT_MAX)	\
+	    ? ((*(idxPtr) = (objPtr)->internalRep.longValue), TCL_OK) \
+	    : TclGetIntForIndex((interp), (objPtr), (endValue), (idxPtr)))
+#endif
+
+/*
+ * Macro used to save a function call for common uses of
+ * Tcl_GetWideIntFromObj(). The ANSI C "prototype" is:
+ *
+ * MODULE_SCOPE int TclGetWideIntFromObj(Tcl_Interp *interp, Tcl_Obj *objPtr,
+ *			Tcl_WideInt *wideIntPtr);
+ */
+
+#ifdef TCL_WIDE_INT_IS_LONG
+#define TclGetWideIntFromObj(interp, objPtr, wideIntPtr) \
+    (((objPtr)->typePtr == &tclIntType)					\
+	? (*(wideIntPtr) = (Tcl_WideInt)				\
+		((objPtr)->internalRep.longValue), TCL_OK) :		\
+	Tcl_GetWideIntFromObj((interp), (objPtr), (wideIntPtr)))
+#else /* !TCL_WIDE_INT_IS_LONG */
+#define TclGetWideIntFromObj(interp, objPtr, wideIntPtr)		\
+    (((objPtr)->typePtr == &tclWideIntType)				\
+	? (*(wideIntPtr) = (objPtr)->internalRep.wideValue, TCL_OK) :	\
+    ((objPtr)->typePtr == &tclIntType)					\
+	? (*(wideIntPtr) = (Tcl_WideInt)				\
+		((objPtr)->internalRep.longValue), TCL_OK) :		\
+	Tcl_GetWideIntFromObj((interp), (objPtr), (wideIntPtr)))
+#endif /* TCL_WIDE_INT_IS_LONG */
+
+/*
+ * Flag values for TclTraceDictPath().
+ *
+ * DICT_PATH_READ indicates that all entries on the path must exist but no
+ * updates will be needed.
+ *
+ * DICT_PATH_UPDATE indicates that we are going to be doing an update at the
+ * tip of the path, so duplication of shared objects should be done along the
+ * way.
+ *
+ * DICT_PATH_EXISTS indicates that we are performing an existence test and a
+ * lookup failure should therefore not be an error. If (and only if) this flag
+ * is set, TclTraceDictPath() will return the special value
+ * DICT_PATH_NON_EXISTENT if the path is not traceable.
+ *
+ * DICT_PATH_CREATE (which also requires the DICT_PATH_UPDATE bit to be set)
+ * indicates that we are to create non-existent dictionaries on the path.
+ */
+
+#define DICT_PATH_READ		0
+#define DICT_PATH_UPDATE	1
+#define DICT_PATH_EXISTS	2
+#define DICT_PATH_CREATE	5
+
+#define DICT_PATH_NON_EXISTENT	((Tcl_Obj *) (void *) 1)
+
+/*
+ *----------------------------------------------------------------
+ * Data structures related to the filesystem internals
+ *----------------------------------------------------------------
+ */
+
+/*
+ * The version_2 filesystem is private to Tcl. As and when these changes have
+ * been thoroughly tested and investigated a new public filesystem interface
+ * will be released. The aim is more versatile virtual filesystem interfaces,
+ * more efficiency in 'path' manipulation and usage, and cleaner filesystem
+ * code internally.
+ */
+
+#define TCL_FILESYSTEM_VERSION_2	((Tcl_FSVersion) 0x2)
+typedef ClientData (TclFSGetCwdProc2)(ClientData clientData);
+typedef int (Tcl_FSLoadFileProc2) (Tcl_Interp *interp, Tcl_Obj *pathPtr,
+	Tcl_LoadHandle *handlePtr, Tcl_FSUnloadFileProc **unloadProcPtr, int flags);
+
+/*
+ * The following types are used for getting and storing platform-specific file
+ * attributes in tclFCmd.c and the various platform-versions of that file.
+ * This is done to have as much common code as possible in the file attributes
+ * code. For more information about the callbacks, see TclFileAttrsCmd in
+ * tclFCmd.c.
+ */
+
+typedef int (TclGetFileAttrProc)(Tcl_Interp *interp, int objIndex,
+	Tcl_Obj *fileName, Tcl_Obj **attrObjPtrPtr);
+typedef int (TclSetFileAttrProc)(Tcl_Interp *interp, int objIndex,
+	Tcl_Obj *fileName, Tcl_Obj *attrObjPtr);
+
+typedef struct TclFileAttrProcs {
+    TclGetFileAttrProc *getProc;/* The procedure for getting attrs. */
+    TclSetFileAttrProc *setProc;/* The procedure for setting attrs. */
+} TclFileAttrProcs;
+
+/*
+ * Opaque handle used in pipeline routines to encapsulate platform-dependent
+ * state.
+ */
+
+typedef struct TclFile_ *TclFile;
+
+/*
+ * The "globParameters" argument of the function TclGlob is an or'ed
+ * combination of the following values:
+ */
+
+#define TCL_GLOBMODE_NO_COMPLAIN	1
+#define TCL_GLOBMODE_JOIN		2
+#define TCL_GLOBMODE_DIR		4
+#define TCL_GLOBMODE_TAILS		8
+
+typedef enum Tcl_PathPart {
+    TCL_PATH_DIRNAME,
+    TCL_PATH_TAIL,
+    TCL_PATH_EXTENSION,
+    TCL_PATH_ROOT
+} Tcl_PathPart;
+
+/*
+ *----------------------------------------------------------------
+ * Data structures related to obsolete filesystem hooks
+ *----------------------------------------------------------------
+ */
+
+typedef int (TclStatProc_)(const char *path, struct stat *buf);
+typedef int (TclAccessProc_)(const char *path, int mode);
+typedef Tcl_Channel (TclOpenFileChannelProc_)(Tcl_Interp *interp,
+	const char *fileName, const char *modeString, int permissions);
+
+/*
+ *----------------------------------------------------------------
+ * Data structures related to procedures
+ *----------------------------------------------------------------
+ */
+
+typedef Tcl_CmdProc *TclCmdProcType;
+typedef Tcl_ObjCmdProc *TclObjCmdProcType;
+
+/*
+ *----------------------------------------------------------------
+ * Data structures for process-global values.
+ *----------------------------------------------------------------
+ */
+
+typedef void (TclInitProcessGlobalValueProc)(char **valuePtr, int *lengthPtr,
+	Tcl_Encoding *encodingPtr);
+
+/*
+ * A ProcessGlobalValue struct exists for each internal value in Tcl that is
+ * to be shared among several threads. Each thread sees a (Tcl_Obj) copy of
+ * the value, and the master is kept as a counted string, with epoch and mutex
+ * control. Each ProcessGlobalValue struct should be a static variable in some
+ * file.
+ */
+
+typedef struct ProcessGlobalValue {
+    int epoch;			/* Epoch counter to detect changes in the
+				 * master value. */
+    int numBytes;		/* Length of the master string. */
+    char *value;		/* The master string value. */
+    Tcl_Encoding encoding;	/* system encoding when master string was
+				 * initialized. */
+    TclInitProcessGlobalValueProc *proc;
+    				/* A procedure to initialize the master string
+				 * copy when a "get" request comes in before
+				 * any "set" request has been received. */
+    Tcl_Mutex mutex;		/* Enforce orderly access from multiple
+				 * threads. */
+    Tcl_ThreadDataKey key;	/* Key for per-thread data holding the
+				 * (Tcl_Obj) copy for each thread. */
+} ProcessGlobalValue;
+
+/*
+ *----------------------------------------------------------------------
+ * Flags for TclParseNumber
+ *----------------------------------------------------------------------
+ */
+
+#define TCL_PARSE_DECIMAL_ONLY		1
+				/* Leading zero doesn't denote octal or
+				 * hex. */
+#define TCL_PARSE_OCTAL_ONLY		2
+				/* Parse octal even without prefix. */
+#define TCL_PARSE_HEXADECIMAL_ONLY	4
+				/* Parse hexadecimal even without prefix. */
+#define TCL_PARSE_INTEGER_ONLY		8
+				/* Disable floating point parsing. */
+#define TCL_PARSE_SCAN_PREFIXES		16
+				/* Use [scan] rules dealing with 0?
+				 * prefixes. */
+#define TCL_PARSE_NO_WHITESPACE		32
+				/* Reject leading/trailing whitespace. */
+#define TCL_PARSE_BINARY_ONLY	64
+				/* Parse binary even without prefix. */
+
+/*
+ *----------------------------------------------------------------------
+ * Type values TclGetNumberFromObj
+ *----------------------------------------------------------------------
+ */
+
+#define TCL_NUMBER_LONG		1
+#define TCL_NUMBER_WIDE		2
+#define TCL_NUMBER_BIG		3
+#define TCL_NUMBER_DOUBLE	4
+#define TCL_NUMBER_NAN		5
+
+/*
+ *----------------------------------------------------------------
+ * Variables shared among Tcl modules but not used by the outside world.
+ *----------------------------------------------------------------
+ */
+
+MODULE_SCOPE char *tclNativeExecutableName;
+MODULE_SCOPE int tclFindExecutableSearchDone;
+MODULE_SCOPE char *tclMemDumpFileName;
+MODULE_SCOPE TclPlatformType tclPlatform;
+MODULE_SCOPE Tcl_NotifierProcs tclNotifierHooks;
+
+MODULE_SCOPE Tcl_Encoding tclIdentityEncoding;
+
+/*
+ * TIP #233 (Virtualized Time)
+ * Data for the time hooks, if any.
+ */
+
+MODULE_SCOPE Tcl_GetTimeProc *tclGetTimeProcPtr;
+MODULE_SCOPE Tcl_ScaleTimeProc *tclScaleTimeProcPtr;
+MODULE_SCOPE ClientData tclTimeClientData;
+
+/*
+ * Variables denoting the Tcl object types defined in the core.
+ */
+
+MODULE_SCOPE const Tcl_ObjType tclBignumType;
+MODULE_SCOPE const Tcl_ObjType tclBooleanType;
+MODULE_SCOPE const Tcl_ObjType tclByteArrayType;
+MODULE_SCOPE const Tcl_ObjType tclByteCodeType;
+MODULE_SCOPE const Tcl_ObjType tclDoubleType;
+MODULE_SCOPE const Tcl_ObjType tclEndOffsetType;
+MODULE_SCOPE const Tcl_ObjType tclIntType;
+MODULE_SCOPE const Tcl_ObjType tclListType;
+MODULE_SCOPE const Tcl_ObjType tclDictType;
+MODULE_SCOPE const Tcl_ObjType tclProcBodyType;
+MODULE_SCOPE const Tcl_ObjType tclStringType;
+MODULE_SCOPE const Tcl_ObjType tclArraySearchType;
+MODULE_SCOPE const Tcl_ObjType tclEnsembleCmdType;
+#ifndef TCL_WIDE_INT_IS_LONG
+MODULE_SCOPE const Tcl_ObjType tclWideIntType;
+#endif
+MODULE_SCOPE const Tcl_ObjType tclRegexpType;
+MODULE_SCOPE Tcl_ObjType tclCmdNameType;
+
+/*
+ * Variables denoting the hash key types defined in the core.
+ */
+
+MODULE_SCOPE const Tcl_HashKeyType tclArrayHashKeyType;
+MODULE_SCOPE const Tcl_HashKeyType tclOneWordHashKeyType;
+MODULE_SCOPE const Tcl_HashKeyType tclStringHashKeyType;
+MODULE_SCOPE const Tcl_HashKeyType tclObjHashKeyType;
+
+/*
+ * The head of the list of free Tcl objects, and the total number of Tcl
+ * objects ever allocated and freed.
+ */
+
+MODULE_SCOPE Tcl_Obj *	tclFreeObjList;
+
+#ifdef TCL_COMPILE_STATS
+MODULE_SCOPE long	tclObjsAlloced;
+MODULE_SCOPE long	tclObjsFreed;
+#define TCL_MAX_SHARED_OBJ_STATS 5
+MODULE_SCOPE long	tclObjsShared[TCL_MAX_SHARED_OBJ_STATS];
+#endif /* TCL_COMPILE_STATS */
+
+/*
+ * Pointer to a heap-allocated string of length zero that the Tcl core uses as
+ * the value of an empty string representation for an object. This value is
+ * shared by all new objects allocated by Tcl_NewObj.
+ */
+
+MODULE_SCOPE char *	tclEmptyStringRep;
+MODULE_SCOPE char	tclEmptyString;
+
+/*
+ *----------------------------------------------------------------
+ * Procedures shared among Tcl modules but not used by the outside world,
+ * introduced by/for NRE.
+ *----------------------------------------------------------------
+ */
+
+MODULE_SCOPE Tcl_ObjCmdProc TclNRApplyObjCmd;
+MODULE_SCOPE Tcl_ObjCmdProc TclNREvalObjCmd;
+MODULE_SCOPE Tcl_ObjCmdProc TclNRCatchObjCmd;
+MODULE_SCOPE Tcl_ObjCmdProc TclNRExprObjCmd;
+MODULE_SCOPE Tcl_ObjCmdProc TclNRForObjCmd;
+MODULE_SCOPE Tcl_ObjCmdProc TclNRForeachCmd;
+MODULE_SCOPE Tcl_ObjCmdProc TclNRIfObjCmd;
+MODULE_SCOPE Tcl_ObjCmdProc TclNRLmapCmd;
+MODULE_SCOPE Tcl_ObjCmdProc TclNRPackageObjCmd;
+MODULE_SCOPE Tcl_ObjCmdProc TclNRSourceObjCmd;
+MODULE_SCOPE Tcl_ObjCmdProc TclNRSubstObjCmd;
+MODULE_SCOPE Tcl_ObjCmdProc TclNRSwitchObjCmd;
+MODULE_SCOPE Tcl_ObjCmdProc TclNRTryObjCmd;
+MODULE_SCOPE Tcl_ObjCmdProc TclNRUplevelObjCmd;
+MODULE_SCOPE Tcl_ObjCmdProc TclNRWhileObjCmd;
+
+MODULE_SCOPE Tcl_NRPostProc TclNRForIterCallback;
+MODULE_SCOPE Tcl_NRPostProc TclNRCoroutineActivateCallback;
+MODULE_SCOPE Tcl_ObjCmdProc TclNRTailcallObjCmd;
+MODULE_SCOPE Tcl_NRPostProc TclNRTailcallEval;
+MODULE_SCOPE Tcl_ObjCmdProc TclNRCoroutineObjCmd;
+MODULE_SCOPE Tcl_ObjCmdProc TclNRYieldObjCmd;
+MODULE_SCOPE Tcl_ObjCmdProc TclNRYieldmObjCmd;
+MODULE_SCOPE Tcl_ObjCmdProc TclNRYieldToObjCmd;
+MODULE_SCOPE Tcl_ObjCmdProc TclNRInvoke;
+MODULE_SCOPE Tcl_NRPostProc TclNRReleaseValues;
+
+MODULE_SCOPE void  TclSetTailcall(Tcl_Interp *interp, Tcl_Obj *tailcallPtr);
+MODULE_SCOPE void  TclPushTailcallPoint(Tcl_Interp *interp);
+
+/* These two can be considered for the public api */
+MODULE_SCOPE void  TclMarkTailcall(Tcl_Interp *interp);
+MODULE_SCOPE void  TclSkipTailcall(Tcl_Interp *interp);
+
+/*
+ * This structure holds the data for the various iteration callbacks used to
+ * NRE the 'for' and 'while' commands. We need a separate structure because we
+ * have more than the 4 client data entries we can provide directly thorugh
+ * the callback API. It is the 'word' information which puts us over the
+ * limit. It is needed because the loop body is argument 4 of 'for' and
+ * argument 2 of 'while'. Not providing the correct index confuses the #280
+ * code. We TclSmallAlloc/Free this.
+ */
+
+typedef struct ForIterData {
+    Tcl_Obj *cond;		/* Loop condition expression. */
+    Tcl_Obj *body;		/* Loop body. */
+    Tcl_Obj *next;		/* Loop step script, NULL for 'while'. */
+    const char *msg;		/* Error message part. */
+    int word;			/* Index of the body script in the command */
+} ForIterData;
+
+/* TIP #357 - Structure doing the bookkeeping of handles for Tcl_LoadFile
+ *            and Tcl_FindSymbol. This structure corresponds to an opaque
+ *            typedef in tcl.h */
+
+typedef void* TclFindSymbolProc(Tcl_Interp* interp, Tcl_LoadHandle loadHandle,
+				const char* symbol);
+struct Tcl_LoadHandle_ {
+    ClientData clientData;	/* Client data is the load handle in the
+				 * native filesystem if a module was loaded
+				 * there, or an opaque pointer to a structure
+				 * for further bookkeeping on load-from-VFS
+				 * and load-from-memory */
+    TclFindSymbolProc* findSymbolProcPtr;
+				/* Procedure that resolves symbols in a
+				 * loaded module */
+    Tcl_FSUnloadFileProc* unloadFileProcPtr;
+				/* Procedure that unloads a loaded module */
+};
+
+/* Flags for conversion of doubles to digit strings */
+
+#define TCL_DD_SHORTEST 		0x4
+				/* Use the shortest possible string */
+#define TCL_DD_STEELE   		0x5
+				/* Use the original Steele&White algorithm */
+#define TCL_DD_E_FORMAT 		0x2
+				/* Use a fixed-length string of digits,
+				 * suitable for E format*/
+#define TCL_DD_F_FORMAT 		0x3
+				/* Use a fixed number of digits after the
+				 * decimal point, suitable for F format */
+
+#define TCL_DD_SHORTEN_FLAG 		0x4
+				/* Allow return of a shorter digit string
+				 * if it converts losslessly */
+#define TCL_DD_NO_QUICK 		0x8
+				/* Debug flag: forbid quick FP conversion */
+
+#define TCL_DD_CONVERSION_TYPE_MASK	0x3
+				/* Mask to isolate the conversion type */
+#define TCL_DD_STEELE0 			0x1
+				/* 'Steele&White' after masking */
+#define TCL_DD_SHORTEST0		0x0
+				/* 'Shortest possible' after masking */
+
+/*
+ *----------------------------------------------------------------
+ * Procedures shared among Tcl modules but not used by the outside world:
+ *----------------------------------------------------------------
+ */
+
+MODULE_SCOPE void	TclAppendBytesToByteArray(Tcl_Obj *objPtr,
+			    const unsigned char *bytes, int len);
+MODULE_SCOPE int	TclNREvalCmd(Tcl_Interp *interp, Tcl_Obj *objPtr,
+			    int flags);
+MODULE_SCOPE void	TclAdvanceContinuations(int *line, int **next,
+			    int loc);
+MODULE_SCOPE void	TclAdvanceLines(int *line, const char *start,
+			    const char *end);
+MODULE_SCOPE void	TclArgumentEnter(Tcl_Interp *interp,
+			    Tcl_Obj *objv[], int objc, CmdFrame *cf);
+MODULE_SCOPE void	TclArgumentRelease(Tcl_Interp *interp,
+			    Tcl_Obj *objv[], int objc);
+MODULE_SCOPE void	TclArgumentBCEnter(Tcl_Interp *interp,
+			    Tcl_Obj *objv[], int objc,
+			    void *codePtr, CmdFrame *cfPtr, int cmd, int pc);
+MODULE_SCOPE void	TclArgumentBCRelease(Tcl_Interp *interp,
+			    CmdFrame *cfPtr);
+MODULE_SCOPE void	TclArgumentGet(Tcl_Interp *interp, Tcl_Obj *obj,
+			    CmdFrame **cfPtrPtr, int *wordPtr);
+MODULE_SCOPE int	TclArraySet(Tcl_Interp *interp,
+			    Tcl_Obj *arrayNameObj, Tcl_Obj *arrayElemObj);
+MODULE_SCOPE double	TclBignumToDouble(const mp_int *bignum);
+MODULE_SCOPE int	TclByteArrayMatch(const unsigned char *string,
+			    int strLen, const unsigned char *pattern,
+			    int ptnLen, int flags);
+MODULE_SCOPE double	TclCeil(const mp_int *a);
+MODULE_SCOPE void	TclChannelPreserve(Tcl_Channel chan);
+MODULE_SCOPE void	TclChannelRelease(Tcl_Channel chan);
+MODULE_SCOPE int	TclCheckBadOctal(Tcl_Interp *interp,
+			    const char *value);
+MODULE_SCOPE int	TclChanCaughtErrorBypass(Tcl_Interp *interp,
+			    Tcl_Channel chan);
+MODULE_SCOPE Tcl_ObjCmdProc TclChannelNamesCmd;
+MODULE_SCOPE Tcl_NRPostProc TclClearRootEnsemble;
+MODULE_SCOPE ContLineLoc *TclContinuationsEnter(Tcl_Obj *objPtr, int num,
+			    int *loc);
+MODULE_SCOPE void	TclContinuationsEnterDerived(Tcl_Obj *objPtr,
+			    int start, int *clNext);
+MODULE_SCOPE ContLineLoc *TclContinuationsGet(Tcl_Obj *objPtr);
+MODULE_SCOPE void	TclContinuationsCopy(Tcl_Obj *objPtr,
+			    Tcl_Obj *originObjPtr);
+MODULE_SCOPE int	TclConvertElement(const char *src, int length,
+			    char *dst, int flags);
+MODULE_SCOPE Tcl_Command TclCreateObjCommandInNs (
+			    Tcl_Interp *interp,
+			    const char *cmdName,
+			    Tcl_Namespace *nsPtr,
+			    Tcl_ObjCmdProc *proc,
+			    ClientData clientData,
+			    Tcl_CmdDeleteProc *deleteProc);
+MODULE_SCOPE Tcl_Command TclCreateEnsembleInNs(
+			    Tcl_Interp *interp,
+			    const char *name,
+			    Tcl_Namespace *nameNamespacePtr,
+			    Tcl_Namespace *ensembleNamespacePtr,
+			    int flags);
+MODULE_SCOPE void	TclDeleteNamespaceVars(Namespace *nsPtr);
+MODULE_SCOPE int	TclFindDictElement(Tcl_Interp *interp,
+			    const char *dict, int dictLength,
+			    const char **elementPtr, const char **nextPtr,
+			    int *sizePtr, int *literalPtr);
+/* TIP #280 - Modified token based evulation, with line information. */
+MODULE_SCOPE int	TclEvalEx(Tcl_Interp *interp, const char *script,
+			    int numBytes, int flags, int line,
+			    int *clNextOuter, const char *outerScript);
+MODULE_SCOPE Tcl_ObjCmdProc TclFileAttrsCmd;
+MODULE_SCOPE Tcl_ObjCmdProc TclFileCopyCmd;
+MODULE_SCOPE Tcl_ObjCmdProc TclFileDeleteCmd;
+MODULE_SCOPE Tcl_ObjCmdProc TclFileLinkCmd;
+MODULE_SCOPE Tcl_ObjCmdProc TclFileMakeDirsCmd;
+MODULE_SCOPE Tcl_ObjCmdProc TclFileReadLinkCmd;
+MODULE_SCOPE Tcl_ObjCmdProc TclFileRenameCmd;
+MODULE_SCOPE Tcl_ObjCmdProc TclFileTemporaryCmd;
+MODULE_SCOPE void	TclCreateLateExitHandler(Tcl_ExitProc *proc,
+			    ClientData clientData);
+MODULE_SCOPE void	TclDeleteLateExitHandler(Tcl_ExitProc *proc,
+			    ClientData clientData);
+MODULE_SCOPE char *	TclDStringAppendObj(Tcl_DString *dsPtr,
+			    Tcl_Obj *objPtr);
+MODULE_SCOPE char *	TclDStringAppendDString(Tcl_DString *dsPtr,
+			    Tcl_DString *toAppendPtr);
+MODULE_SCOPE Tcl_Obj *	TclDStringToObj(Tcl_DString *dsPtr);
+MODULE_SCOPE Tcl_Obj *const *	TclFetchEnsembleRoot(Tcl_Interp *interp,
+			    Tcl_Obj *const *objv, int objc, int *objcPtr);
+Tcl_Namespace * 	TclEnsureNamespace(
+			    Tcl_Interp *interp,
+			    Tcl_Namespace *namespacePtr);
+
+MODULE_SCOPE void	TclFinalizeAllocSubsystem(void);
+MODULE_SCOPE void	TclFinalizeAsync(void);
+MODULE_SCOPE void	TclFinalizeDoubleConversion(void);
+MODULE_SCOPE void	TclFinalizeEncodingSubsystem(void);
+MODULE_SCOPE void	TclFinalizeEnvironment(void);
+MODULE_SCOPE void	TclFinalizeEvaluation(void);
+MODULE_SCOPE void	TclFinalizeExecution(void);
+MODULE_SCOPE void	TclFinalizeIOSubsystem(void);
+MODULE_SCOPE void	TclFinalizeFilesystem(void);
+MODULE_SCOPE void	TclResetFilesystem(void);
+MODULE_SCOPE void	TclFinalizeLoad(void);
+MODULE_SCOPE void	TclFinalizeLock(void);
+MODULE_SCOPE void	TclFinalizeMemorySubsystem(void);
+MODULE_SCOPE void	TclFinalizeNotifier(void);
+MODULE_SCOPE void	TclFinalizeObjects(void);
+MODULE_SCOPE void	TclFinalizePreserve(void);
+MODULE_SCOPE void	TclFinalizeSynchronization(void);
+MODULE_SCOPE void	TclFinalizeThreadAlloc(void);
+MODULE_SCOPE void	TclFinalizeThreadAllocThread(void);
+MODULE_SCOPE void	TclFinalizeThreadData(int quick);
+MODULE_SCOPE void	TclFinalizeThreadObjects(void);
+MODULE_SCOPE double	TclFloor(const mp_int *a);
+MODULE_SCOPE void	TclFormatNaN(double value, char *buffer);
+MODULE_SCOPE int	TclFSFileAttrIndex(Tcl_Obj *pathPtr,
+			    const char *attributeName, int *indexPtr);
+MODULE_SCOPE Tcl_Command TclNRCreateCommandInNs (
+			    Tcl_Interp *interp,
+			    const char *cmdName,
+			    Tcl_Namespace *nsPtr,
+			    Tcl_ObjCmdProc *proc,
+			    Tcl_ObjCmdProc *nreProc,
+			    ClientData clientData,
+			    Tcl_CmdDeleteProc *deleteProc);
+
+MODULE_SCOPE int	TclNREvalFile(Tcl_Interp *interp, Tcl_Obj *pathPtr,
+			    const char *encodingName);
+MODULE_SCOPE void	TclFSUnloadTempFile(Tcl_LoadHandle loadHandle);
+MODULE_SCOPE int *	TclGetAsyncReadyPtr(void);
+MODULE_SCOPE Tcl_Obj *	TclGetBgErrorHandler(Tcl_Interp *interp);
+MODULE_SCOPE int	TclGetChannelFromObj(Tcl_Interp *interp,
+			    Tcl_Obj *objPtr, Tcl_Channel *chanPtr,
+			    int *modePtr, int flags);
+MODULE_SCOPE CmdFrame *	TclGetCmdFrameForProcedure(Proc *procPtr);
+MODULE_SCOPE int	TclGetCompletionCodeFromObj(Tcl_Interp *interp,
+			    Tcl_Obj *value, int *code);
+MODULE_SCOPE int	TclGetNumberFromObj(Tcl_Interp *interp,
+			    Tcl_Obj *objPtr, ClientData *clientDataPtr,
+			    int *typePtr);
+MODULE_SCOPE int	TclGetOpenModeEx(Tcl_Interp *interp,
+			    const char *modeString, int *seekFlagPtr,
+			    int *binaryPtr);
+MODULE_SCOPE Tcl_Obj *	TclGetProcessGlobalValue(ProcessGlobalValue *pgvPtr);
+MODULE_SCOPE Tcl_Obj *	TclGetSourceFromFrame(CmdFrame *cfPtr, int objc,
+			    Tcl_Obj *const objv[]);
+MODULE_SCOPE char *	TclGetStringStorage(Tcl_Obj *objPtr,
+			    unsigned int *sizePtr);
+MODULE_SCOPE int	TclGlob(Tcl_Interp *interp, char *pattern,
+			    Tcl_Obj *unquotedPrefix, int globFlags,
+			    Tcl_GlobTypeData *types);
+MODULE_SCOPE int	TclIncrObj(Tcl_Interp *interp, Tcl_Obj *valuePtr,
+			    Tcl_Obj *incrPtr);
+MODULE_SCOPE Tcl_Obj *	TclIncrObjVar2(Tcl_Interp *interp, Tcl_Obj *part1Ptr,
+			    Tcl_Obj *part2Ptr, Tcl_Obj *incrPtr, int flags);
+MODULE_SCOPE int	TclInfoExistsCmd(ClientData dummy, Tcl_Interp *interp,
+			    int objc, Tcl_Obj *const objv[]);
+MODULE_SCOPE int	TclInfoCoroutineCmd(ClientData dummy, Tcl_Interp *interp,
+			    int objc, Tcl_Obj *const objv[]);
+MODULE_SCOPE Tcl_Obj *	TclInfoFrame(Tcl_Interp *interp, CmdFrame *framePtr);
+MODULE_SCOPE int	TclInfoGlobalsCmd(ClientData dummy, Tcl_Interp *interp,
+			    int objc, Tcl_Obj *const objv[]);
+MODULE_SCOPE int	TclInfoLocalsCmd(ClientData dummy, Tcl_Interp *interp,
+			    int objc, Tcl_Obj *const objv[]);
+MODULE_SCOPE int	TclInfoVarsCmd(ClientData dummy, Tcl_Interp *interp,
+			    int objc, Tcl_Obj *const objv[]);
+MODULE_SCOPE void	TclInitAlloc(void);
+MODULE_SCOPE void	TclInitDbCkalloc(void);
+MODULE_SCOPE void	TclInitDoubleConversion(void);
+MODULE_SCOPE void	TclInitEmbeddedConfigurationInformation(
+			    Tcl_Interp *interp);
+MODULE_SCOPE void	TclInitEncodingSubsystem(void);
+MODULE_SCOPE void	TclInitIOSubsystem(void);
+MODULE_SCOPE void	TclInitLimitSupport(Tcl_Interp *interp);
+MODULE_SCOPE void	TclInitNamespaceSubsystem(void);
+MODULE_SCOPE void	TclInitNotifier(void);
+MODULE_SCOPE void	TclInitObjSubsystem(void);
+MODULE_SCOPE void	TclInitSubsystems(void);
+MODULE_SCOPE int	TclInterpReady(Tcl_Interp *interp);
+MODULE_SCOPE int	TclIsSpaceProc(char byte);
+MODULE_SCOPE int	TclIsBareword(char byte);
+MODULE_SCOPE Tcl_Obj *	TclJoinPath(int elements, Tcl_Obj * const objv[]);
+MODULE_SCOPE int	TclJoinThread(Tcl_ThreadId id, int *result);
+MODULE_SCOPE void	TclLimitRemoveAllHandlers(Tcl_Interp *interp);
+MODULE_SCOPE Tcl_Obj *	TclLindexList(Tcl_Interp *interp,
+			    Tcl_Obj *listPtr, Tcl_Obj *argPtr);
+MODULE_SCOPE Tcl_Obj *	TclLindexFlat(Tcl_Interp *interp, Tcl_Obj *listPtr,
+			    int indexCount, Tcl_Obj *const indexArray[]);
+/* TIP #280 */
+MODULE_SCOPE void	TclListLines(Tcl_Obj *listObj, int line, int n,
+			    int *lines, Tcl_Obj *const *elems);
+MODULE_SCOPE Tcl_Obj *	TclListObjCopy(Tcl_Interp *interp, Tcl_Obj *listPtr);
+MODULE_SCOPE Tcl_Obj *	TclLsetList(Tcl_Interp *interp, Tcl_Obj *listPtr,
+			    Tcl_Obj *indexPtr, Tcl_Obj *valuePtr);
+MODULE_SCOPE Tcl_Obj *	TclLsetFlat(Tcl_Interp *interp, Tcl_Obj *listPtr,
+			    int indexCount, Tcl_Obj *const indexArray[],
+			    Tcl_Obj *valuePtr);
+MODULE_SCOPE Tcl_Command TclMakeEnsemble(Tcl_Interp *interp, const char *name,
+			    const EnsembleImplMap map[]);
+MODULE_SCOPE int	TclMaxListLength(const char *bytes, int numBytes,
+			    const char **endPtr);
+MODULE_SCOPE int	TclMergeReturnOptions(Tcl_Interp *interp, int objc,
+			    Tcl_Obj *const objv[], Tcl_Obj **optionsPtrPtr,
+			    int *codePtr, int *levelPtr);
+MODULE_SCOPE Tcl_Obj *  TclNoErrorStack(Tcl_Interp *interp, Tcl_Obj *options);
+MODULE_SCOPE int	TclNokia770Doubles(void);
+MODULE_SCOPE void	TclNsDecrRefCount(Namespace *nsPtr);
+MODULE_SCOPE void	TclObjVarErrMsg(Tcl_Interp *interp, Tcl_Obj *part1Ptr,
+			    Tcl_Obj *part2Ptr, const char *operation,
+			    const char *reason, int index);
+MODULE_SCOPE int	TclObjInvokeNamespace(Tcl_Interp *interp,
+			    int objc, Tcl_Obj *const objv[],
+			    Tcl_Namespace *nsPtr, int flags);
+MODULE_SCOPE int	TclObjUnsetVar2(Tcl_Interp *interp,
+			    Tcl_Obj *part1Ptr, Tcl_Obj *part2Ptr, int flags);
+MODULE_SCOPE int	TclParseBackslash(const char *src,
+			    int numBytes, int *readPtr, char *dst);
+MODULE_SCOPE int	TclParseHex(const char *src, int numBytes,
+			    int *resultPtr);
+MODULE_SCOPE int	TclParseNumber(Tcl_Interp *interp, Tcl_Obj *objPtr,
+			    const char *expected, const char *bytes,
+			    int numBytes, const char **endPtrPtr, int flags);
+MODULE_SCOPE void	TclParseInit(Tcl_Interp *interp, const char *string,
+			    int numBytes, Tcl_Parse *parsePtr);
+MODULE_SCOPE int	TclParseAllWhiteSpace(const char *src, int numBytes);
+MODULE_SCOPE int	TclProcessReturn(Tcl_Interp *interp,
+			    int code, int level, Tcl_Obj *returnOpts);
+MODULE_SCOPE int	TclpObjLstat(Tcl_Obj *pathPtr, Tcl_StatBuf *buf);
+MODULE_SCOPE Tcl_Obj *	TclpTempFileName(void);
+MODULE_SCOPE Tcl_Obj *  TclpTempFileNameForLibrary(Tcl_Interp *interp, Tcl_Obj* pathPtr);
+MODULE_SCOPE Tcl_Obj *	TclNewFSPathObj(Tcl_Obj *dirPtr, const char *addStrRep,
+			    int len);
+MODULE_SCOPE int	TclpDeleteFile(const void *path);
+MODULE_SCOPE void	TclpFinalizeCondition(Tcl_Condition *condPtr);
+MODULE_SCOPE void	TclpFinalizeMutex(Tcl_Mutex *mutexPtr);
+MODULE_SCOPE void	TclpFinalizePipes(void);
+MODULE_SCOPE void	TclpFinalizeSockets(void);
+MODULE_SCOPE int	TclCreateSocketAddress(Tcl_Interp *interp,
+			    struct addrinfo **addrlist,
+			    const char *host, int port, int willBind,
+			    const char **errorMsgPtr);
+MODULE_SCOPE int	TclpThreadCreate(Tcl_ThreadId *idPtr,
+			    Tcl_ThreadCreateProc *proc, ClientData clientData,
+			    int stackSize, int flags);
+MODULE_SCOPE int	TclpFindVariable(const char *name, int *lengthPtr);
+MODULE_SCOPE void	TclpInitLibraryPath(char **valuePtr,
+			    int *lengthPtr, Tcl_Encoding *encodingPtr);
+MODULE_SCOPE void	TclpInitLock(void);
+MODULE_SCOPE void	TclpInitPlatform(void);
+MODULE_SCOPE void	TclpInitUnlock(void);
+MODULE_SCOPE Tcl_Obj *	TclpObjListVolumes(void);
+MODULE_SCOPE void	TclpMasterLock(void);
+MODULE_SCOPE void	TclpMasterUnlock(void);
+MODULE_SCOPE int	TclpMatchFiles(Tcl_Interp *interp, char *separators,
+			    Tcl_DString *dirPtr, char *pattern, char *tail);
+MODULE_SCOPE int	TclpObjNormalizePath(Tcl_Interp *interp,
+			    Tcl_Obj *pathPtr, int nextCheckpoint);
+MODULE_SCOPE void	TclpNativeJoinPath(Tcl_Obj *prefix, const char *joining);
+MODULE_SCOPE Tcl_Obj *	TclpNativeSplitPath(Tcl_Obj *pathPtr, int *lenPtr);
+MODULE_SCOPE Tcl_PathType TclpGetNativePathType(Tcl_Obj *pathPtr,
+			    int *driveNameLengthPtr, Tcl_Obj **driveNameRef);
+MODULE_SCOPE int	TclCrossFilesystemCopy(Tcl_Interp *interp,
+			    Tcl_Obj *source, Tcl_Obj *target);
+MODULE_SCOPE int	TclpMatchInDirectory(Tcl_Interp *interp,
+			    Tcl_Obj *resultPtr, Tcl_Obj *pathPtr,
+			    const char *pattern, Tcl_GlobTypeData *types);
+MODULE_SCOPE ClientData	TclpGetNativeCwd(ClientData clientData);
+MODULE_SCOPE Tcl_FSDupInternalRepProc TclNativeDupInternalRep;
+MODULE_SCOPE Tcl_Obj *	TclpObjLink(Tcl_Obj *pathPtr, Tcl_Obj *toPtr,
+			    int linkType);
+MODULE_SCOPE int	TclpObjChdir(Tcl_Obj *pathPtr);
+MODULE_SCOPE Tcl_Channel TclpOpenTemporaryFile(Tcl_Obj *dirObj,
+			    Tcl_Obj *basenameObj, Tcl_Obj *extensionObj,
+			    Tcl_Obj *resultingNameObj);
+MODULE_SCOPE Tcl_Obj *	TclPathPart(Tcl_Interp *interp, Tcl_Obj *pathPtr,
+			    Tcl_PathPart portion);
+MODULE_SCOPE char *	TclpReadlink(const char *fileName,
+			    Tcl_DString *linkPtr);
+MODULE_SCOPE void	TclpSetInterfaces(void);
+MODULE_SCOPE void	TclpSetVariables(Tcl_Interp *interp);
+MODULE_SCOPE void *	TclThreadStorageKeyGet(Tcl_ThreadDataKey *keyPtr);
+MODULE_SCOPE void	TclThreadStorageKeySet(Tcl_ThreadDataKey *keyPtr,
+			    void *data);
+MODULE_SCOPE void	TclpThreadExit(int status);
+MODULE_SCOPE void	TclRememberCondition(Tcl_Condition *mutex);
+MODULE_SCOPE void	TclRememberJoinableThread(Tcl_ThreadId id);
+MODULE_SCOPE void	TclRememberMutex(Tcl_Mutex *mutex);
+MODULE_SCOPE void	TclRemoveScriptLimitCallbacks(Tcl_Interp *interp);
+MODULE_SCOPE int	TclReToGlob(Tcl_Interp *interp, const char *reStr,
+			    int reStrLen, Tcl_DString *dsPtr, int *flagsPtr,
+			    int *quantifiersFoundPtr);
+MODULE_SCOPE int	TclScanElement(const char *string, int length,
+			    char *flagPtr);
+MODULE_SCOPE void	TclSetBgErrorHandler(Tcl_Interp *interp,
+			    Tcl_Obj *cmdPrefix);
+MODULE_SCOPE void	TclSetBignumIntRep(Tcl_Obj *objPtr,
+			    mp_int *bignumValue);
+MODULE_SCOPE int	TclSetBooleanFromAny(Tcl_Interp *interp, Tcl_Obj *objPtr);
+MODULE_SCOPE void	TclSetCmdNameObj(Tcl_Interp *interp, Tcl_Obj *objPtr,
+			    Command *cmdPtr);
+MODULE_SCOPE void	TclSetDuplicateObj(Tcl_Obj *dupPtr, Tcl_Obj *objPtr);
+MODULE_SCOPE void	TclSetProcessGlobalValue(ProcessGlobalValue *pgvPtr,
+			    Tcl_Obj *newValue, Tcl_Encoding encoding);
+MODULE_SCOPE void	TclSignalExitThread(Tcl_ThreadId id, int result);
+MODULE_SCOPE void	TclSpellFix(Tcl_Interp *interp,
+			    Tcl_Obj *const *objv, int objc, int subIdx,
+			    Tcl_Obj *bad, Tcl_Obj *fix);
+MODULE_SCOPE void *	TclStackRealloc(Tcl_Interp *interp, void *ptr,
+			    int numBytes);
+MODULE_SCOPE int	TclStringMatch(const char *str, int strLen,
+			    const char *pattern, int ptnLen, int flags);
+MODULE_SCOPE int	TclStringMatchObj(Tcl_Obj *stringObj,
+			    Tcl_Obj *patternObj, int flags);
+MODULE_SCOPE Tcl_Obj *	TclStringObjReverse(Tcl_Obj *objPtr);
+MODULE_SCOPE void	TclSubstCompile(Tcl_Interp *interp, const char *bytes,
+			    int numBytes, int flags, int line,
+			    struct CompileEnv *envPtr);
+MODULE_SCOPE int	TclSubstOptions(Tcl_Interp *interp, int numOpts,
+			    Tcl_Obj *const opts[], int *flagPtr);
+MODULE_SCOPE void	TclSubstParse(Tcl_Interp *interp, const char *bytes,
+			    int numBytes, int flags, Tcl_Parse *parsePtr,
+			    Tcl_InterpState *statePtr);
+MODULE_SCOPE int	TclSubstTokens(Tcl_Interp *interp, Tcl_Token *tokenPtr,
+			    int count, int *tokensLeftPtr, int line,
+			    int *clNextOuter, const char *outerScript);
+MODULE_SCOPE int	TclTrimLeft(const char *bytes, int numBytes,
+			    const char *trim, int numTrim);
+MODULE_SCOPE int	TclTrimRight(const char *bytes, int numBytes,
+			    const char *trim, int numTrim);
+MODULE_SCOPE int	TclUtfCasecmp(const char *cs, const char *ct);
+MODULE_SCOPE Tcl_Obj *	TclpNativeToNormalized(ClientData clientData);
+MODULE_SCOPE Tcl_Obj *	TclpFilesystemPathType(Tcl_Obj *pathPtr);
+MODULE_SCOPE int	TclpDlopen(Tcl_Interp *interp, Tcl_Obj *pathPtr,
+			    Tcl_LoadHandle *loadHandle,
+			    Tcl_FSUnloadFileProc **unloadProcPtr, int flags);
+MODULE_SCOPE int	TclpUtime(Tcl_Obj *pathPtr, struct utimbuf *tval);
+#ifdef TCL_LOAD_FROM_MEMORY
+MODULE_SCOPE void *	TclpLoadMemoryGetBuffer(Tcl_Interp *interp, int size);
+MODULE_SCOPE int	TclpLoadMemory(Tcl_Interp *interp, void *buffer,
+			    int size, int codeSize, Tcl_LoadHandle *loadHandle,
+			    Tcl_FSUnloadFileProc **unloadProcPtr, int flags);
+#endif
+MODULE_SCOPE void	TclInitThreadStorage(void);
+MODULE_SCOPE void	TclFinalizeThreadDataThread(void);
+MODULE_SCOPE void	TclFinalizeThreadStorage(void);
+#ifdef TCL_WIDE_CLICKS
+MODULE_SCOPE Tcl_WideInt TclpGetWideClicks(void);
+MODULE_SCOPE double	TclpWideClicksToNanoseconds(Tcl_WideInt clicks);
+#endif
+MODULE_SCOPE int	TclZlibInit(Tcl_Interp *interp);
+MODULE_SCOPE void *	TclpThreadCreateKey(void);
+MODULE_SCOPE void	TclpThreadDeleteKey(void *keyPtr);
+MODULE_SCOPE void	TclpThreadSetMasterTSD(void *tsdKeyPtr, void *ptr);
+MODULE_SCOPE void *	TclpThreadGetMasterTSD(void *tsdKeyPtr);
+
+MODULE_SCOPE void	TclErrorStackResetIf(Tcl_Interp *interp, const char *msg, int length);
+
+/*
+ *----------------------------------------------------------------
+ * Command procedures in the generic core:
+ *----------------------------------------------------------------
+ */
+
+MODULE_SCOPE int	Tcl_AfterObjCmd(ClientData clientData,
+			    Tcl_Interp *interp, int objc,
+			    Tcl_Obj *const objv[]);
+MODULE_SCOPE int	Tcl_AppendObjCmd(ClientData clientData,
+			    Tcl_Interp *interp, int objc,
+			    Tcl_Obj *const objv[]);
+MODULE_SCOPE int	Tcl_ApplyObjCmd(ClientData clientData,
+			    Tcl_Interp *interp, int objc,
+			    Tcl_Obj *const objv[]);
+MODULE_SCOPE Tcl_Command TclInitArrayCmd(Tcl_Interp *interp);
+MODULE_SCOPE Tcl_Command TclInitBinaryCmd(Tcl_Interp *interp);
+MODULE_SCOPE int	Tcl_BreakObjCmd(ClientData clientData,
+			    Tcl_Interp *interp, int objc,
+			    Tcl_Obj *const objv[]);
+MODULE_SCOPE int	Tcl_CaseObjCmd(ClientData clientData,
+			    Tcl_Interp *interp, int objc,
+			    Tcl_Obj *const objv[]);
+MODULE_SCOPE int	Tcl_CatchObjCmd(ClientData clientData,
+			    Tcl_Interp *interp, int objc,
+			    Tcl_Obj *const objv[]);
+MODULE_SCOPE int	Tcl_CdObjCmd(ClientData clientData,
+			    Tcl_Interp *interp, int objc,
+			    Tcl_Obj *const objv[]);
+MODULE_SCOPE Tcl_Command TclInitChanCmd(Tcl_Interp *interp);
+MODULE_SCOPE int	TclChanCreateObjCmd(ClientData clientData,
+			    Tcl_Interp *interp, int objc,
+			    Tcl_Obj *const objv[]);
+MODULE_SCOPE int	TclChanPostEventObjCmd(ClientData clientData,
+			    Tcl_Interp *interp, int objc,
+			    Tcl_Obj *const objv[]);
+MODULE_SCOPE int	TclChanPopObjCmd(ClientData clientData,
+			    Tcl_Interp *interp, int objc, Tcl_Obj *const objv[]);
+MODULE_SCOPE int	TclChanPushObjCmd(ClientData clientData,
+			    Tcl_Interp *interp, int objc, Tcl_Obj *const objv[]);
+MODULE_SCOPE void	TclClockInit(Tcl_Interp *interp);
+MODULE_SCOPE int	TclClockOldscanObjCmd(
+			    ClientData clientData, Tcl_Interp *interp,
+			    int objc, Tcl_Obj *const objv[]);
+MODULE_SCOPE int	Tcl_CloseObjCmd(ClientData clientData,
+			    Tcl_Interp *interp, int objc,
+			    Tcl_Obj *const objv[]);
+MODULE_SCOPE int	Tcl_ConcatObjCmd(ClientData clientData,
+			    Tcl_Interp *interp, int objc,
+			    Tcl_Obj *const objv[]);
+MODULE_SCOPE int	Tcl_ContinueObjCmd(ClientData clientData,
+			    Tcl_Interp *interp, int objc,
+			    Tcl_Obj *const objv[]);
+MODULE_SCOPE Tcl_TimerToken TclCreateAbsoluteTimerHandler(
+			    Tcl_Time *timePtr, Tcl_TimerProc *proc,
+			    ClientData clientData);
+MODULE_SCOPE int	TclDefaultBgErrorHandlerObjCmd(
+			    ClientData clientData, Tcl_Interp *interp,
+			    int objc, Tcl_Obj *const objv[]);
+MODULE_SCOPE Tcl_Command TclInitDictCmd(Tcl_Interp *interp);
+MODULE_SCOPE int	TclDictWithFinish(Tcl_Interp *interp, Var *varPtr,
+			    Var *arrayPtr, Tcl_Obj *part1Ptr,
+			    Tcl_Obj *part2Ptr, int index, int pathc,
+			    Tcl_Obj *const pathv[], Tcl_Obj *keysPtr);
+MODULE_SCOPE Tcl_Obj *	TclDictWithInit(Tcl_Interp *interp, Tcl_Obj *dictPtr,
+			    int pathc, Tcl_Obj *const pathv[]);
+MODULE_SCOPE int	Tcl_DisassembleObjCmd(ClientData clientData,
+			    Tcl_Interp *interp, int objc,
+			    Tcl_Obj *const objv[]);
+
+/* Assemble command function */
+MODULE_SCOPE int	Tcl_AssembleObjCmd(ClientData clientData,
+			    Tcl_Interp *interp, int objc,
+			    Tcl_Obj *const objv[]);
+MODULE_SCOPE int	TclNRAssembleObjCmd(ClientData clientData,
+			    Tcl_Interp *interp, int objc,
+			    Tcl_Obj *const objv[]);
+MODULE_SCOPE Tcl_Command TclInitEncodingCmd(Tcl_Interp *interp);
+MODULE_SCOPE int	TclMakeEncodingCommandSafe(Tcl_Interp *interp);
+MODULE_SCOPE int	Tcl_EofObjCmd(ClientData clientData,
+			    Tcl_Interp *interp, int objc,
+			    Tcl_Obj *const objv[]);
+MODULE_SCOPE int	Tcl_ErrorObjCmd(ClientData clientData,
+			    Tcl_Interp *interp, int objc,
+			    Tcl_Obj *const objv[]);
+MODULE_SCOPE int	Tcl_EvalObjCmd(ClientData clientData,
+			    Tcl_Interp *interp, int objc,
+			    Tcl_Obj *const objv[]);
+MODULE_SCOPE int	Tcl_ExecObjCmd(ClientData clientData,
+			    Tcl_Interp *interp, int objc,
+			    Tcl_Obj *const objv[]);
+MODULE_SCOPE int	Tcl_ExitObjCmd(ClientData clientData,
+			    Tcl_Interp *interp, int objc,
+			    Tcl_Obj *const objv[]);
+MODULE_SCOPE int	Tcl_ExprObjCmd(ClientData clientData,
+			    Tcl_Interp *interp, int objc,
+			    Tcl_Obj *const objv[]);
+MODULE_SCOPE int	Tcl_FblockedObjCmd(ClientData clientData,
+			    Tcl_Interp *interp, int objc,
+			    Tcl_Obj *const objv[]);
+MODULE_SCOPE int	Tcl_FconfigureObjCmd(
+			    ClientData clientData, Tcl_Interp *interp,
+			    int objc, Tcl_Obj *const objv[]);
+MODULE_SCOPE int	Tcl_FcopyObjCmd(ClientData dummy,
+			    Tcl_Interp *interp, int objc,
+			    Tcl_Obj *const objv[]);
+MODULE_SCOPE Tcl_Command TclInitFileCmd(Tcl_Interp *interp);
+MODULE_SCOPE int	TclMakeFileCommandSafe(Tcl_Interp *interp);
+MODULE_SCOPE int	Tcl_FileEventObjCmd(ClientData clientData,
+			    Tcl_Interp *interp, int objc,
+			    Tcl_Obj *const objv[]);
+MODULE_SCOPE int	Tcl_FlushObjCmd(ClientData clientData,
+			    Tcl_Interp *interp, int objc,
+			    Tcl_Obj *const objv[]);
+MODULE_SCOPE int	Tcl_ForObjCmd(ClientData clientData,
+			    Tcl_Interp *interp, int objc,
+			    Tcl_Obj *const objv[]);
+MODULE_SCOPE int	Tcl_ForeachObjCmd(ClientData clientData,
+			    Tcl_Interp *interp, int objc,
+			    Tcl_Obj *const objv[]);
+MODULE_SCOPE int	Tcl_FormatObjCmd(ClientData dummy,
+			    Tcl_Interp *interp, int objc,
+			    Tcl_Obj *const objv[]);
+MODULE_SCOPE int	Tcl_GetsObjCmd(ClientData clientData,
+			    Tcl_Interp *interp, int objc,
+			    Tcl_Obj *const objv[]);
+MODULE_SCOPE int	Tcl_GlobalObjCmd(ClientData clientData,
+			    Tcl_Interp *interp, int objc,
+			    Tcl_Obj *const objv[]);
+MODULE_SCOPE int	Tcl_GlobObjCmd(ClientData clientData,
+			    Tcl_Interp *interp, int objc,
+			    Tcl_Obj *const objv[]);
+MODULE_SCOPE int	Tcl_IfObjCmd(ClientData clientData,
+			    Tcl_Interp *interp, int objc,
+			    Tcl_Obj *const objv[]);
+MODULE_SCOPE int	Tcl_IncrObjCmd(ClientData clientData,
+			    Tcl_Interp *interp, int objc,
+			    Tcl_Obj *const objv[]);
+MODULE_SCOPE Tcl_Command TclInitInfoCmd(Tcl_Interp *interp);
+MODULE_SCOPE int	Tcl_InterpObjCmd(ClientData clientData,
+			    Tcl_Interp *interp, int argc,
+			    Tcl_Obj *const objv[]);
+MODULE_SCOPE int	Tcl_JoinObjCmd(ClientData clientData,
+			    Tcl_Interp *interp, int objc,
+			    Tcl_Obj *const objv[]);
+MODULE_SCOPE int	Tcl_LappendObjCmd(ClientData clientData,
+			    Tcl_Interp *interp, int objc,
+			    Tcl_Obj *const objv[]);
+MODULE_SCOPE int	Tcl_LassignObjCmd(ClientData clientData,
+			    Tcl_Interp *interp, int objc,
+			    Tcl_Obj *const objv[]);
+MODULE_SCOPE int	Tcl_LindexObjCmd(ClientData clientData,
+			    Tcl_Interp *interp, int objc,
+			    Tcl_Obj *const objv[]);
+MODULE_SCOPE int	Tcl_LinsertObjCmd(ClientData clientData,
+			    Tcl_Interp *interp, int objc,
+			    Tcl_Obj *const objv[]);
+MODULE_SCOPE int	Tcl_LlengthObjCmd(ClientData clientData,
+			    Tcl_Interp *interp, int objc,
+			    Tcl_Obj *const objv[]);
+MODULE_SCOPE int	Tcl_ListObjCmd(ClientData clientData,
+			    Tcl_Interp *interp, int objc,
+			    Tcl_Obj *const objv[]);
+MODULE_SCOPE int	Tcl_LmapObjCmd(ClientData clientData,
+			    Tcl_Interp *interp, int objc,
+			    Tcl_Obj *const objv[]);
+MODULE_SCOPE int	Tcl_LoadObjCmd(ClientData clientData,
+			    Tcl_Interp *interp, int objc,
+			    Tcl_Obj *const objv[]);
+MODULE_SCOPE int	Tcl_LrangeObjCmd(ClientData clientData,
+			    Tcl_Interp *interp, int objc,
+			    Tcl_Obj *const objv[]);
+MODULE_SCOPE int	Tcl_LrepeatObjCmd(ClientData clientData,
+			    Tcl_Interp *interp, int objc,
+			    Tcl_Obj *const objv[]);
+MODULE_SCOPE int	Tcl_LreplaceObjCmd(ClientData clientData,
+			    Tcl_Interp *interp, int objc,
+			    Tcl_Obj *const objv[]);
+MODULE_SCOPE int	Tcl_LreverseObjCmd(ClientData clientData,
+			    Tcl_Interp *interp, int objc,
+			    Tcl_Obj *const objv[]);
+MODULE_SCOPE int	Tcl_LsearchObjCmd(ClientData clientData,
+			    Tcl_Interp *interp, int objc,
+			    Tcl_Obj *const objv[]);
+MODULE_SCOPE int	Tcl_LsetObjCmd(ClientData clientData,
+			    Tcl_Interp *interp, int objc,
+			    Tcl_Obj *const objv[]);
+MODULE_SCOPE int	Tcl_LsortObjCmd(ClientData clientData,
+			    Tcl_Interp *interp, int objc,
+			    Tcl_Obj *const objv[]);
+MODULE_SCOPE Tcl_Command TclInitNamespaceCmd(Tcl_Interp *interp);
+MODULE_SCOPE int	TclNamespaceEnsembleCmd(ClientData dummy,
+			    Tcl_Interp *interp, int objc,
+			    Tcl_Obj *const objv[]);
+MODULE_SCOPE int	Tcl_OpenObjCmd(ClientData clientData,
+			    Tcl_Interp *interp, int objc,
+			    Tcl_Obj *const objv[]);
+MODULE_SCOPE int	Tcl_PackageObjCmd(ClientData clientData,
+			    Tcl_Interp *interp, int objc,
+			    Tcl_Obj *const objv[]);
+MODULE_SCOPE int	Tcl_PidObjCmd(ClientData clientData,
+			    Tcl_Interp *interp, int objc,
+			    Tcl_Obj *const objv[]);
+MODULE_SCOPE Tcl_Command TclInitPrefixCmd(Tcl_Interp *interp);
+MODULE_SCOPE int	Tcl_PutsObjCmd(ClientData clientData,
+			    Tcl_Interp *interp, int objc,
+			    Tcl_Obj *const objv[]);
+MODULE_SCOPE int	Tcl_PwdObjCmd(ClientData clientData,
+			    Tcl_Interp *interp, int objc,
+			    Tcl_Obj *const objv[]);
+MODULE_SCOPE int	Tcl_ReadObjCmd(ClientData clientData,
+			    Tcl_Interp *interp, int objc,
+			    Tcl_Obj *const objv[]);
+MODULE_SCOPE int	Tcl_RegexpObjCmd(ClientData clientData,
+			    Tcl_Interp *interp, int objc,
+			    Tcl_Obj *const objv[]);
+MODULE_SCOPE int	Tcl_RegsubObjCmd(ClientData clientData,
+			    Tcl_Interp *interp, int objc,
+			    Tcl_Obj *const objv[]);
+MODULE_SCOPE int	Tcl_RenameObjCmd(ClientData clientData,
+			    Tcl_Interp *interp, int objc,
+			    Tcl_Obj *const objv[]);
+MODULE_SCOPE int	Tcl_RepresentationCmd(ClientData clientData,
+			    Tcl_Interp *interp, int objc,
+			    Tcl_Obj *const objv[]);
+MODULE_SCOPE int	Tcl_ReturnObjCmd(ClientData clientData,
+			    Tcl_Interp *interp, int objc,
+			    Tcl_Obj *const objv[]);
+MODULE_SCOPE int	Tcl_ScanObjCmd(ClientData clientData,
+			    Tcl_Interp *interp, int objc,
+			    Tcl_Obj *const objv[]);
+MODULE_SCOPE int	Tcl_SeekObjCmd(ClientData clientData,
+			    Tcl_Interp *interp, int objc,
+			    Tcl_Obj *const objv[]);
+MODULE_SCOPE int	Tcl_SetObjCmd(ClientData clientData,
+			    Tcl_Interp *interp, int objc,
+			    Tcl_Obj *const objv[]);
+MODULE_SCOPE int	Tcl_SplitObjCmd(ClientData clientData,
+			    Tcl_Interp *interp, int objc,
+			    Tcl_Obj *const objv[]);
+MODULE_SCOPE int	Tcl_SocketObjCmd(ClientData clientData,
+			    Tcl_Interp *interp, int objc,
+			    Tcl_Obj *const objv[]);
+MODULE_SCOPE int	Tcl_SourceObjCmd(ClientData clientData,
+			    Tcl_Interp *interp, int objc,
+			    Tcl_Obj *const objv[]);
+MODULE_SCOPE Tcl_Command TclInitStringCmd(Tcl_Interp *interp);
+MODULE_SCOPE int	Tcl_SubstObjCmd(ClientData clientData,
+			    Tcl_Interp *interp, int objc,
+			    Tcl_Obj *const objv[]);
+MODULE_SCOPE int	Tcl_SwitchObjCmd(ClientData clientData,
+			    Tcl_Interp *interp, int objc,
+			    Tcl_Obj *const objv[]);
+MODULE_SCOPE int	Tcl_TellObjCmd(ClientData clientData,
+			    Tcl_Interp *interp, int objc,
+			    Tcl_Obj *const objv[]);
+MODULE_SCOPE int	Tcl_ThrowObjCmd(ClientData dummy, Tcl_Interp *interp,
+			    int objc, Tcl_Obj *const objv[]);
+MODULE_SCOPE int	Tcl_TimeObjCmd(ClientData clientData,
+			    Tcl_Interp *interp, int objc,
+			    Tcl_Obj *const objv[]);
+MODULE_SCOPE int	Tcl_TraceObjCmd(ClientData clientData,
+			    Tcl_Interp *interp, int objc,
+			    Tcl_Obj *const objv[]);
+MODULE_SCOPE int	Tcl_TryObjCmd(ClientData clientData,
+			    Tcl_Interp *interp, int objc,
+			    Tcl_Obj *const objv[]);
+MODULE_SCOPE int	Tcl_UnloadObjCmd(ClientData clientData,
+			    Tcl_Interp *interp, int objc,
+			    Tcl_Obj *const objv[]);
+MODULE_SCOPE int	Tcl_UnsetObjCmd(ClientData clientData,
+			    Tcl_Interp *interp, int objc,
+			    Tcl_Obj *const objv[]);
+MODULE_SCOPE int	Tcl_UpdateObjCmd(ClientData clientData,
+			    Tcl_Interp *interp, int objc,
+			    Tcl_Obj *const objv[]);
+MODULE_SCOPE int	Tcl_UplevelObjCmd(ClientData clientData,
+			    Tcl_Interp *interp, int objc,
+			    Tcl_Obj *const objv[]);
+MODULE_SCOPE int	Tcl_UpvarObjCmd(ClientData clientData,
+			    Tcl_Interp *interp, int objc,
+			    Tcl_Obj *const objv[]);
+MODULE_SCOPE int	Tcl_VariableObjCmd(ClientData clientData,
+			    Tcl_Interp *interp, int objc,
+			    Tcl_Obj *const objv[]);
+MODULE_SCOPE int	Tcl_VwaitObjCmd(ClientData clientData,
+			    Tcl_Interp *interp, int objc,
+			    Tcl_Obj *const objv[]);
+MODULE_SCOPE int	Tcl_WhileObjCmd(ClientData clientData,
+			    Tcl_Interp *interp, int objc,
+			    Tcl_Obj *const objv[]);
+
+/*
+ *----------------------------------------------------------------
+ * Compilation procedures for commands in the generic core:
+ *----------------------------------------------------------------
+ */
+
+MODULE_SCOPE int	TclCompileAppendCmd(Tcl_Interp *interp,
+			    Tcl_Parse *parsePtr, Command *cmdPtr,
+			    struct CompileEnv *envPtr);
+MODULE_SCOPE int	TclCompileArrayExistsCmd(Tcl_Interp *interp,
+			    Tcl_Parse *parsePtr, Command *cmdPtr,
+			    struct CompileEnv *envPtr);
+MODULE_SCOPE int	TclCompileArraySetCmd(Tcl_Interp *interp,
+			    Tcl_Parse *parsePtr, Command *cmdPtr,
+			    struct CompileEnv *envPtr);
+MODULE_SCOPE int	TclCompileArrayUnsetCmd(Tcl_Interp *interp,
+			    Tcl_Parse *parsePtr, Command *cmdPtr,
+			    struct CompileEnv *envPtr);
+MODULE_SCOPE int	TclCompileBreakCmd(Tcl_Interp *interp,
+			    Tcl_Parse *parsePtr, Command *cmdPtr,
+			    struct CompileEnv *envPtr);
+MODULE_SCOPE int	TclCompileCatchCmd(Tcl_Interp *interp,
+			    Tcl_Parse *parsePtr, Command *cmdPtr,
+			    struct CompileEnv *envPtr);
+MODULE_SCOPE int	TclCompileClockClicksCmd(Tcl_Interp *interp,
+			    Tcl_Parse *parsePtr, Command *cmdPtr,
+			    struct CompileEnv *envPtr);
+MODULE_SCOPE int	TclCompileClockReadingCmd(Tcl_Interp *interp,
+			    Tcl_Parse *parsePtr, Command *cmdPtr,
+			    struct CompileEnv *envPtr);
+MODULE_SCOPE int	TclCompileConcatCmd(Tcl_Interp *interp,
+			    Tcl_Parse *parsePtr, Command *cmdPtr,
+			    struct CompileEnv *envPtr);
+MODULE_SCOPE int	TclCompileContinueCmd(Tcl_Interp *interp,
+			    Tcl_Parse *parsePtr, Command *cmdPtr,
+			    struct CompileEnv *envPtr);
+MODULE_SCOPE int	TclCompileDictAppendCmd(Tcl_Interp *interp,
+			    Tcl_Parse *parsePtr, Command *cmdPtr,
+			    struct CompileEnv *envPtr);
+MODULE_SCOPE int	TclCompileDictCreateCmd(Tcl_Interp *interp,
+			    Tcl_Parse *parsePtr, Command *cmdPtr,
+			    struct CompileEnv *envPtr);
+MODULE_SCOPE int	TclCompileDictExistsCmd(Tcl_Interp *interp,
+			    Tcl_Parse *parsePtr, Command *cmdPtr,
+			    struct CompileEnv *envPtr);
+MODULE_SCOPE int	TclCompileDictForCmd(Tcl_Interp *interp,
+			    Tcl_Parse *parsePtr, Command *cmdPtr,
+			    struct CompileEnv *envPtr);
+MODULE_SCOPE int	TclCompileDictGetCmd(Tcl_Interp *interp,
+			    Tcl_Parse *parsePtr, Command *cmdPtr,
+			    struct CompileEnv *envPtr);
+MODULE_SCOPE int	TclCompileDictIncrCmd(Tcl_Interp *interp,
+			    Tcl_Parse *parsePtr, Command *cmdPtr,
+			    struct CompileEnv *envPtr);
+MODULE_SCOPE int	TclCompileDictLappendCmd(Tcl_Interp *interp,
+			    Tcl_Parse *parsePtr, Command *cmdPtr,
+			    struct CompileEnv *envPtr);
+MODULE_SCOPE int	TclCompileDictMapCmd(Tcl_Interp *interp,
+			    Tcl_Parse *parsePtr, Command *cmdPtr,
+			    struct CompileEnv *envPtr);
+MODULE_SCOPE int	TclCompileDictMergeCmd(Tcl_Interp *interp,
+			    Tcl_Parse *parsePtr, Command *cmdPtr,
+			    struct CompileEnv *envPtr);
+MODULE_SCOPE int	TclCompileDictSetCmd(Tcl_Interp *interp,
+			    Tcl_Parse *parsePtr, Command *cmdPtr,
+			    struct CompileEnv *envPtr);
+MODULE_SCOPE int	TclCompileDictUnsetCmd(Tcl_Interp *interp,
+			    Tcl_Parse *parsePtr, Command *cmdPtr,
+			    struct CompileEnv *envPtr);
+MODULE_SCOPE int	TclCompileDictUpdateCmd(Tcl_Interp *interp,
+			    Tcl_Parse *parsePtr, Command *cmdPtr,
+			    struct CompileEnv *envPtr);
+MODULE_SCOPE int	TclCompileDictWithCmd(Tcl_Interp *interp,
+			    Tcl_Parse *parsePtr, Command *cmdPtr,
+			    struct CompileEnv *envPtr);
+MODULE_SCOPE int	TclCompileEnsemble(Tcl_Interp *interp,
+			    Tcl_Parse *parsePtr, Command *cmdPtr,
+			    struct CompileEnv *envPtr);
+MODULE_SCOPE int	TclCompileErrorCmd(Tcl_Interp *interp,
+			    Tcl_Parse *parsePtr, Command *cmdPtr,
+			    struct CompileEnv *envPtr);
+MODULE_SCOPE int	TclCompileExprCmd(Tcl_Interp *interp,
+			    Tcl_Parse *parsePtr, Command *cmdPtr,
+			    struct CompileEnv *envPtr);
+MODULE_SCOPE int	TclCompileForCmd(Tcl_Interp *interp,
+			    Tcl_Parse *parsePtr, Command *cmdPtr,
+			    struct CompileEnv *envPtr);
+MODULE_SCOPE int	TclCompileForeachCmd(Tcl_Interp *interp,
+			    Tcl_Parse *parsePtr, Command *cmdPtr,
+			    struct CompileEnv *envPtr);
+MODULE_SCOPE int	TclCompileFormatCmd(Tcl_Interp *interp,
+			    Tcl_Parse *parsePtr, Command *cmdPtr,
+			    struct CompileEnv *envPtr);
+MODULE_SCOPE int	TclCompileGlobalCmd(Tcl_Interp *interp,
+			    Tcl_Parse *parsePtr, Command *cmdPtr,
+			    struct CompileEnv *envPtr);
+MODULE_SCOPE int	TclCompileIfCmd(Tcl_Interp *interp,
+			    Tcl_Parse *parsePtr, Command *cmdPtr,
+			    struct CompileEnv *envPtr);
+MODULE_SCOPE int	TclCompileInfoCommandsCmd(Tcl_Interp *interp,
+			    Tcl_Parse *parsePtr, Command *cmdPtr,
+			    struct CompileEnv *envPtr);
+MODULE_SCOPE int	TclCompileInfoCoroutineCmd(Tcl_Interp *interp,
+			    Tcl_Parse *parsePtr, Command *cmdPtr,
+			    struct CompileEnv *envPtr);
+MODULE_SCOPE int	TclCompileInfoExistsCmd(Tcl_Interp *interp,
+			    Tcl_Parse *parsePtr, Command *cmdPtr,
+			    struct CompileEnv *envPtr);
+MODULE_SCOPE int	TclCompileInfoLevelCmd(Tcl_Interp *interp,
+			    Tcl_Parse *parsePtr, Command *cmdPtr,
+			    struct CompileEnv *envPtr);
+MODULE_SCOPE int	TclCompileInfoObjectClassCmd(Tcl_Interp *interp,
+			    Tcl_Parse *parsePtr, Command *cmdPtr,
+			    struct CompileEnv *envPtr);
+MODULE_SCOPE int	TclCompileInfoObjectIsACmd(Tcl_Interp *interp,
+			    Tcl_Parse *parsePtr, Command *cmdPtr,
+			    struct CompileEnv *envPtr);
+MODULE_SCOPE int	TclCompileInfoObjectNamespaceCmd(Tcl_Interp *interp,
+			    Tcl_Parse *parsePtr, Command *cmdPtr,
+			    struct CompileEnv *envPtr);
+MODULE_SCOPE int	TclCompileIncrCmd(Tcl_Interp *interp,
+			    Tcl_Parse *parsePtr, Command *cmdPtr,
+			    struct CompileEnv *envPtr);
+MODULE_SCOPE int	TclCompileLappendCmd(Tcl_Interp *interp,
+			    Tcl_Parse *parsePtr, Command *cmdPtr,
+			    struct CompileEnv *envPtr);
+MODULE_SCOPE int	TclCompileLassignCmd(Tcl_Interp *interp,
+			    Tcl_Parse *parsePtr, Command *cmdPtr,
+			    struct CompileEnv *envPtr);
+MODULE_SCOPE int	TclCompileLindexCmd(Tcl_Interp *interp,
+			    Tcl_Parse *parsePtr, Command *cmdPtr,
+			    struct CompileEnv *envPtr);
+MODULE_SCOPE int	TclCompileLinsertCmd(Tcl_Interp *interp,
+			    Tcl_Parse *parsePtr, Command *cmdPtr,
+			    struct CompileEnv *envPtr);
+MODULE_SCOPE int	TclCompileListCmd(Tcl_Interp *interp,
+			    Tcl_Parse *parsePtr, Command *cmdPtr,
+			    struct CompileEnv *envPtr);
+MODULE_SCOPE int	TclCompileLlengthCmd(Tcl_Interp *interp,
+			    Tcl_Parse *parsePtr, Command *cmdPtr,
+			    struct CompileEnv *envPtr);
+MODULE_SCOPE int	TclCompileLmapCmd(Tcl_Interp *interp,
+			    Tcl_Parse *parsePtr, Command *cmdPtr,
+			    struct CompileEnv *envPtr);
+MODULE_SCOPE int	TclCompileLrangeCmd(Tcl_Interp *interp,
+			    Tcl_Parse *parsePtr, Command *cmdPtr,
+			    struct CompileEnv *envPtr);
+MODULE_SCOPE int	TclCompileLreplaceCmd(Tcl_Interp *interp,
+			    Tcl_Parse *parsePtr, Command *cmdPtr,
+			    struct CompileEnv *envPtr);
+MODULE_SCOPE int	TclCompileLsetCmd(Tcl_Interp *interp,
+			    Tcl_Parse *parsePtr, Command *cmdPtr,
+			    struct CompileEnv *envPtr);
+MODULE_SCOPE int	TclCompileNamespaceCodeCmd(Tcl_Interp *interp,
+			    Tcl_Parse *parsePtr, Command *cmdPtr,
+			    struct CompileEnv *envPtr);
+MODULE_SCOPE int	TclCompileNamespaceCurrentCmd(Tcl_Interp *interp,
+			    Tcl_Parse *parsePtr, Command *cmdPtr,
+			    struct CompileEnv *envPtr);
+MODULE_SCOPE int	TclCompileNamespaceOriginCmd(Tcl_Interp *interp,
+			    Tcl_Parse *parsePtr, Command *cmdPtr,
+			    struct CompileEnv *envPtr);
+MODULE_SCOPE int	TclCompileNamespaceQualifiersCmd(Tcl_Interp *interp,
+			    Tcl_Parse *parsePtr, Command *cmdPtr,
+			    struct CompileEnv *envPtr);
+MODULE_SCOPE int	TclCompileNamespaceTailCmd(Tcl_Interp *interp,
+			    Tcl_Parse *parsePtr, Command *cmdPtr,
+			    struct CompileEnv *envPtr);
+MODULE_SCOPE int	TclCompileNamespaceUpvarCmd(Tcl_Interp *interp,
+			    Tcl_Parse *parsePtr, Command *cmdPtr,
+			    struct CompileEnv *envPtr);
+MODULE_SCOPE int	TclCompileNamespaceWhichCmd(Tcl_Interp *interp,
+			    Tcl_Parse *parsePtr, Command *cmdPtr,
+			    struct CompileEnv *envPtr);
+MODULE_SCOPE int	TclCompileNoOp(Tcl_Interp *interp,
+			    Tcl_Parse *parsePtr, Command *cmdPtr,
+			    struct CompileEnv *envPtr);
+MODULE_SCOPE int	TclCompileObjectNextCmd(Tcl_Interp *interp,
+			    Tcl_Parse *parsePtr, Command *cmdPtr,
+			    struct CompileEnv *envPtr);
+MODULE_SCOPE int	TclCompileObjectNextToCmd(Tcl_Interp *interp,
+			    Tcl_Parse *parsePtr, Command *cmdPtr,
+			    struct CompileEnv *envPtr);
+MODULE_SCOPE int	TclCompileObjectSelfCmd(Tcl_Interp *interp,
+			    Tcl_Parse *parsePtr, Command *cmdPtr,
+			    struct CompileEnv *envPtr);
+MODULE_SCOPE int	TclCompileRegexpCmd(Tcl_Interp *interp,
+			    Tcl_Parse *parsePtr, Command *cmdPtr,
+			    struct CompileEnv *envPtr);
+MODULE_SCOPE int	TclCompileRegsubCmd(Tcl_Interp *interp,
+			    Tcl_Parse *parsePtr, Command *cmdPtr,
+			    struct CompileEnv *envPtr);
+MODULE_SCOPE int	TclCompileReturnCmd(Tcl_Interp *interp,
+			    Tcl_Parse *parsePtr, Command *cmdPtr,
+			    struct CompileEnv *envPtr);
+MODULE_SCOPE int	TclCompileSetCmd(Tcl_Interp *interp,
+			    Tcl_Parse *parsePtr, Command *cmdPtr,
+			    struct CompileEnv *envPtr);
+MODULE_SCOPE int	TclCompileStringCatCmd(Tcl_Interp *interp,
+			    Tcl_Parse *parsePtr, Command *cmdPtr,
+			    struct CompileEnv *envPtr);
+MODULE_SCOPE int	TclCompileStringCmpCmd(Tcl_Interp *interp,
+			    Tcl_Parse *parsePtr, Command *cmdPtr,
+			    struct CompileEnv *envPtr);
+MODULE_SCOPE int	TclCompileStringEqualCmd(Tcl_Interp *interp,
+			    Tcl_Parse *parsePtr, Command *cmdPtr,
+			    struct CompileEnv *envPtr);
+MODULE_SCOPE int	TclCompileStringFirstCmd(Tcl_Interp *interp,
+			    Tcl_Parse *parsePtr, Command *cmdPtr,
+			    struct CompileEnv *envPtr);
+MODULE_SCOPE int	TclCompileStringIndexCmd(Tcl_Interp *interp,
+			    Tcl_Parse *parsePtr, Command *cmdPtr,
+			    struct CompileEnv *envPtr);
+MODULE_SCOPE int	TclCompileStringIsCmd(Tcl_Interp *interp,
+			    Tcl_Parse *parsePtr, Command *cmdPtr,
+			    struct CompileEnv *envPtr);
+MODULE_SCOPE int	TclCompileStringLastCmd(Tcl_Interp *interp,
+			    Tcl_Parse *parsePtr, Command *cmdPtr,
+			    struct CompileEnv *envPtr);
+MODULE_SCOPE int	TclCompileStringLenCmd(Tcl_Interp *interp,
+			    Tcl_Parse *parsePtr, Command *cmdPtr,
+			    struct CompileEnv *envPtr);
+MODULE_SCOPE int	TclCompileStringMapCmd(Tcl_Interp *interp,
+			    Tcl_Parse *parsePtr, Command *cmdPtr,
+			    struct CompileEnv *envPtr);
+MODULE_SCOPE int	TclCompileStringMatchCmd(Tcl_Interp *interp,
+			    Tcl_Parse *parsePtr, Command *cmdPtr,
+			    struct CompileEnv *envPtr);
+MODULE_SCOPE int	TclCompileStringRangeCmd(Tcl_Interp *interp,
+			    Tcl_Parse *parsePtr, Command *cmdPtr,
+			    struct CompileEnv *envPtr);
+MODULE_SCOPE int	TclCompileStringReplaceCmd(Tcl_Interp *interp,
+			    Tcl_Parse *parsePtr, Command *cmdPtr,
+			    struct CompileEnv *envPtr);
+MODULE_SCOPE int	TclCompileStringToLowerCmd(Tcl_Interp *interp,
+			    Tcl_Parse *parsePtr, Command *cmdPtr,
+			    struct CompileEnv *envPtr);
+MODULE_SCOPE int	TclCompileStringToTitleCmd(Tcl_Interp *interp,
+			    Tcl_Parse *parsePtr, Command *cmdPtr,
+			    struct CompileEnv *envPtr);
+MODULE_SCOPE int	TclCompileStringToUpperCmd(Tcl_Interp *interp,
+			    Tcl_Parse *parsePtr, Command *cmdPtr,
+			    struct CompileEnv *envPtr);
+MODULE_SCOPE int	TclCompileStringTrimCmd(Tcl_Interp *interp,
+			    Tcl_Parse *parsePtr, Command *cmdPtr,
+			    struct CompileEnv *envPtr);
+MODULE_SCOPE int	TclCompileStringTrimLCmd(Tcl_Interp *interp,
+			    Tcl_Parse *parsePtr, Command *cmdPtr,
+			    struct CompileEnv *envPtr);
+MODULE_SCOPE int	TclCompileStringTrimRCmd(Tcl_Interp *interp,
+			    Tcl_Parse *parsePtr, Command *cmdPtr,
+			    struct CompileEnv *envPtr);
+MODULE_SCOPE int	TclCompileSubstCmd(Tcl_Interp *interp,
+			    Tcl_Parse *parsePtr, Command *cmdPtr,
+			    struct CompileEnv *envPtr);
+MODULE_SCOPE int	TclCompileSwitchCmd(Tcl_Interp *interp,
+			    Tcl_Parse *parsePtr, Command *cmdPtr,
+			    struct CompileEnv *envPtr);
+MODULE_SCOPE int	TclCompileTailcallCmd(Tcl_Interp *interp,
+			    Tcl_Parse *parsePtr, Command *cmdPtr,
+			    struct CompileEnv *envPtr);
+MODULE_SCOPE int	TclCompileThrowCmd(Tcl_Interp *interp,
+			    Tcl_Parse *parsePtr, Command *cmdPtr,
+			    struct CompileEnv *envPtr);
+MODULE_SCOPE int	TclCompileTryCmd(Tcl_Interp *interp,
+			    Tcl_Parse *parsePtr, Command *cmdPtr,
+			    struct CompileEnv *envPtr);
+MODULE_SCOPE int	TclCompileUnsetCmd(Tcl_Interp *interp,
+			    Tcl_Parse *parsePtr, Command *cmdPtr,
+			    struct CompileEnv *envPtr);
+MODULE_SCOPE int	TclCompileUpvarCmd(Tcl_Interp *interp,
+			    Tcl_Parse *parsePtr, Command *cmdPtr,
+			    struct CompileEnv *envPtr);
+MODULE_SCOPE int	TclCompileVariableCmd(Tcl_Interp *interp,
+			    Tcl_Parse *parsePtr, Command *cmdPtr,
+			    struct CompileEnv *envPtr);
+MODULE_SCOPE int	TclCompileWhileCmd(Tcl_Interp *interp,
+			    Tcl_Parse *parsePtr, Command *cmdPtr,
+			    struct CompileEnv *envPtr);
+MODULE_SCOPE int	TclCompileYieldCmd(Tcl_Interp *interp,
+			    Tcl_Parse *parsePtr, Command *cmdPtr,
+			    struct CompileEnv *envPtr);
+MODULE_SCOPE int	TclCompileYieldToCmd(Tcl_Interp *interp,
+			    Tcl_Parse *parsePtr, Command *cmdPtr,
+			    struct CompileEnv *envPtr);
+MODULE_SCOPE int	TclCompileBasic0ArgCmd(Tcl_Interp *interp,
+			    Tcl_Parse *parsePtr, Command *cmdPtr,
+			    struct CompileEnv *envPtr);
+MODULE_SCOPE int	TclCompileBasic1ArgCmd(Tcl_Interp *interp,
+			    Tcl_Parse *parsePtr, Command *cmdPtr,
+			    struct CompileEnv *envPtr);
+MODULE_SCOPE int	TclCompileBasic2ArgCmd(Tcl_Interp *interp,
+			    Tcl_Parse *parsePtr, Command *cmdPtr,
+			    struct CompileEnv *envPtr);
+MODULE_SCOPE int	TclCompileBasic3ArgCmd(Tcl_Interp *interp,
+			    Tcl_Parse *parsePtr, Command *cmdPtr,
+			    struct CompileEnv *envPtr);
+MODULE_SCOPE int	TclCompileBasic0Or1ArgCmd(Tcl_Interp *interp,
+			    Tcl_Parse *parsePtr, Command *cmdPtr,
+			    struct CompileEnv *envPtr);
+MODULE_SCOPE int	TclCompileBasic1Or2ArgCmd(Tcl_Interp *interp,
+			    Tcl_Parse *parsePtr, Command *cmdPtr,
+			    struct CompileEnv *envPtr);
+MODULE_SCOPE int	TclCompileBasic2Or3ArgCmd(Tcl_Interp *interp,
+			    Tcl_Parse *parsePtr, Command *cmdPtr,
+			    struct CompileEnv *envPtr);
+MODULE_SCOPE int	TclCompileBasic0To2ArgCmd(Tcl_Interp *interp,
+			    Tcl_Parse *parsePtr, Command *cmdPtr,
+			    struct CompileEnv *envPtr);
+MODULE_SCOPE int	TclCompileBasic1To3ArgCmd(Tcl_Interp *interp,
+			    Tcl_Parse *parsePtr, Command *cmdPtr,
+			    struct CompileEnv *envPtr);
+MODULE_SCOPE int	TclCompileBasicMin0ArgCmd(Tcl_Interp *interp,
+			    Tcl_Parse *parsePtr, Command *cmdPtr,
+			    struct CompileEnv *envPtr);
+MODULE_SCOPE int	TclCompileBasicMin1ArgCmd(Tcl_Interp *interp,
+			    Tcl_Parse *parsePtr, Command *cmdPtr,
+			    struct CompileEnv *envPtr);
+MODULE_SCOPE int	TclCompileBasicMin2ArgCmd(Tcl_Interp *interp,
+			    Tcl_Parse *parsePtr, Command *cmdPtr,
+			    struct CompileEnv *envPtr);
+
+MODULE_SCOPE int	TclInvertOpCmd(ClientData clientData,
+			    Tcl_Interp *interp, int objc,
+			    Tcl_Obj *const objv[]);
+MODULE_SCOPE int	TclCompileInvertOpCmd(Tcl_Interp *interp,
+			    Tcl_Parse *parsePtr, Command *cmdPtr,
+			    struct CompileEnv *envPtr);
+MODULE_SCOPE int	TclNotOpCmd(ClientData clientData,
+			    Tcl_Interp *interp, int objc,
+			    Tcl_Obj *const objv[]);
+MODULE_SCOPE int	TclCompileNotOpCmd(Tcl_Interp *interp,
+			    Tcl_Parse *parsePtr, Command *cmdPtr,
+			    struct CompileEnv *envPtr);
+MODULE_SCOPE int	TclAddOpCmd(ClientData clientData,
+			    Tcl_Interp *interp, int objc,
+			    Tcl_Obj *const objv[]);
+MODULE_SCOPE int	TclCompileAddOpCmd(Tcl_Interp *interp,
+			    Tcl_Parse *parsePtr, Command *cmdPtr,
+			    struct CompileEnv *envPtr);
+MODULE_SCOPE int	TclMulOpCmd(ClientData clientData,
+			    Tcl_Interp *interp, int objc,
+			    Tcl_Obj *const objv[]);
+MODULE_SCOPE int	TclCompileMulOpCmd(Tcl_Interp *interp,
+			    Tcl_Parse *parsePtr, Command *cmdPtr,
+			    struct CompileEnv *envPtr);
+MODULE_SCOPE int	TclAndOpCmd(ClientData clientData,
+			    Tcl_Interp *interp, int objc,
+			    Tcl_Obj *const objv[]);
+MODULE_SCOPE int	TclCompileAndOpCmd(Tcl_Interp *interp,
+			    Tcl_Parse *parsePtr, Command *cmdPtr,
+			    struct CompileEnv *envPtr);
+MODULE_SCOPE int	TclOrOpCmd(ClientData clientData,
+			    Tcl_Interp *interp, int objc,
+			    Tcl_Obj *const objv[]);
+MODULE_SCOPE int	TclCompileOrOpCmd(Tcl_Interp *interp,
+			    Tcl_Parse *parsePtr, Command *cmdPtr,
+			    struct CompileEnv *envPtr);
+MODULE_SCOPE int	TclXorOpCmd(ClientData clientData,
+			    Tcl_Interp *interp, int objc,
+			    Tcl_Obj *const objv[]);
+MODULE_SCOPE int	TclCompileXorOpCmd(Tcl_Interp *interp,
+			    Tcl_Parse *parsePtr, Command *cmdPtr,
+			    struct CompileEnv *envPtr);
+MODULE_SCOPE int	TclPowOpCmd(ClientData clientData,
+			    Tcl_Interp *interp, int objc,
+			    Tcl_Obj *const objv[]);
+MODULE_SCOPE int	TclCompilePowOpCmd(Tcl_Interp *interp,
+			    Tcl_Parse *parsePtr, Command *cmdPtr,
+			    struct CompileEnv *envPtr);
+MODULE_SCOPE int	TclLshiftOpCmd(ClientData clientData,
+			    Tcl_Interp *interp, int objc,
+			    Tcl_Obj *const objv[]);
+MODULE_SCOPE int	TclCompileLshiftOpCmd(Tcl_Interp *interp,
+			    Tcl_Parse *parsePtr, Command *cmdPtr,
+			    struct CompileEnv *envPtr);
+MODULE_SCOPE int	TclRshiftOpCmd(ClientData clientData,
+			    Tcl_Interp *interp, int objc,
+			    Tcl_Obj *const objv[]);
+MODULE_SCOPE int	TclCompileRshiftOpCmd(Tcl_Interp *interp,
+			    Tcl_Parse *parsePtr, Command *cmdPtr,
+			    struct CompileEnv *envPtr);
+MODULE_SCOPE int	TclModOpCmd(ClientData clientData,
+			    Tcl_Interp *interp, int objc,
+			    Tcl_Obj *const objv[]);
+MODULE_SCOPE int	TclCompileModOpCmd(Tcl_Interp *interp,
+			    Tcl_Parse *parsePtr, Command *cmdPtr,
+			    struct CompileEnv *envPtr);
+MODULE_SCOPE int	TclNeqOpCmd(ClientData clientData,
+			    Tcl_Interp *interp, int objc,
+			    Tcl_Obj *const objv[]);
+MODULE_SCOPE int	TclCompileNeqOpCmd(Tcl_Interp *interp,
+			    Tcl_Parse *parsePtr, Command *cmdPtr,
+			    struct CompileEnv *envPtr);
+MODULE_SCOPE int	TclStrneqOpCmd(ClientData clientData,
+			    Tcl_Interp *interp, int objc,
+			    Tcl_Obj *const objv[]);
+MODULE_SCOPE int	TclCompileStrneqOpCmd(Tcl_Interp *interp,
+			    Tcl_Parse *parsePtr, Command *cmdPtr,
+			    struct CompileEnv *envPtr);
+MODULE_SCOPE int	TclInOpCmd(ClientData clientData,
+			    Tcl_Interp *interp, int objc,
+			    Tcl_Obj *const objv[]);
+MODULE_SCOPE int	TclCompileInOpCmd(Tcl_Interp *interp,
+			    Tcl_Parse *parsePtr, Command *cmdPtr,
+			    struct CompileEnv *envPtr);
+MODULE_SCOPE int	TclNiOpCmd(ClientData clientData,
+			    Tcl_Interp *interp, int objc,
+			    Tcl_Obj *const objv[]);
+MODULE_SCOPE int	TclCompileNiOpCmd(Tcl_Interp *interp,
+			    Tcl_Parse *parsePtr, Command *cmdPtr,
+			    struct CompileEnv *envPtr);
+MODULE_SCOPE int	TclMinusOpCmd(ClientData clientData,
+			    Tcl_Interp *interp, int objc,
+			    Tcl_Obj *const objv[]);
+MODULE_SCOPE int	TclCompileMinusOpCmd(Tcl_Interp *interp,
+			    Tcl_Parse *parsePtr, Command *cmdPtr,
+			    struct CompileEnv *envPtr);
+MODULE_SCOPE int	TclDivOpCmd(ClientData clientData,
+			    Tcl_Interp *interp, int objc,
+			    Tcl_Obj *const objv[]);
+MODULE_SCOPE int	TclCompileDivOpCmd(Tcl_Interp *interp,
+			    Tcl_Parse *parsePtr, Command *cmdPtr,
+			    struct CompileEnv *envPtr);
+MODULE_SCOPE int	TclLessOpCmd(ClientData clientData,
+			    Tcl_Interp *interp, int objc,
+			    Tcl_Obj *const objv[]);
+MODULE_SCOPE int	TclCompileLessOpCmd(Tcl_Interp *interp,
+			    Tcl_Parse *parsePtr, Command *cmdPtr,
+			    struct CompileEnv *envPtr);
+MODULE_SCOPE int	TclLeqOpCmd(ClientData clientData,
+			    Tcl_Interp *interp, int objc,
+			    Tcl_Obj *const objv[]);
+MODULE_SCOPE int	TclCompileLeqOpCmd(Tcl_Interp *interp,
+			    Tcl_Parse *parsePtr, Command *cmdPtr,
+			    struct CompileEnv *envPtr);
+MODULE_SCOPE int	TclGreaterOpCmd(ClientData clientData,
+			    Tcl_Interp *interp, int objc,
+			    Tcl_Obj *const objv[]);
+MODULE_SCOPE int	TclCompileGreaterOpCmd(Tcl_Interp *interp,
+			    Tcl_Parse *parsePtr, Command *cmdPtr,
+			    struct CompileEnv *envPtr);
+MODULE_SCOPE int	TclGeqOpCmd(ClientData clientData,
+			    Tcl_Interp *interp, int objc,
+			    Tcl_Obj *const objv[]);
+MODULE_SCOPE int	TclCompileGeqOpCmd(Tcl_Interp *interp,
+			    Tcl_Parse *parsePtr, Command *cmdPtr,
+			    struct CompileEnv *envPtr);
+MODULE_SCOPE int	TclEqOpCmd(ClientData clientData,
+			    Tcl_Interp *interp, int objc,
+			    Tcl_Obj *const objv[]);
+MODULE_SCOPE int	TclCompileEqOpCmd(Tcl_Interp *interp,
+			    Tcl_Parse *parsePtr, Command *cmdPtr,
+			    struct CompileEnv *envPtr);
+MODULE_SCOPE int	TclStreqOpCmd(ClientData clientData,
+			    Tcl_Interp *interp, int objc,
+			    Tcl_Obj *const objv[]);
+MODULE_SCOPE int	TclCompileStreqOpCmd(Tcl_Interp *interp,
+			    Tcl_Parse *parsePtr, Command *cmdPtr,
+			    struct CompileEnv *envPtr);
+
+MODULE_SCOPE int	TclCompileAssembleCmd(Tcl_Interp *interp,
+			    Tcl_Parse *parsePtr, Command *cmdPtr,
+			    struct CompileEnv *envPtr);
+
+/*
+ * Functions defined in generic/tclVar.c and currently exported only for use
+ * by the bytecode compiler and engine. Some of these could later be placed in
+ * the public interface.
+ */
+
+MODULE_SCOPE Var *	TclObjLookupVarEx(Tcl_Interp * interp,
+			    Tcl_Obj *part1Ptr, Tcl_Obj *part2Ptr, int flags,
+			    const char *msg, const int createPart1,
+			    const int createPart2, Var **arrayPtrPtr);
+MODULE_SCOPE Var *	TclLookupArrayElement(Tcl_Interp *interp,
+			    Tcl_Obj *arrayNamePtr, Tcl_Obj *elNamePtr,
+			    const int flags, const char *msg,
+			    const int createPart1, const int createPart2,
+			    Var *arrayPtr, int index);
+MODULE_SCOPE Tcl_Obj *	TclPtrGetVarIdx(Tcl_Interp *interp,
+			    Var *varPtr, Var *arrayPtr, Tcl_Obj *part1Ptr,
+			    Tcl_Obj *part2Ptr, const int flags, int index);
+MODULE_SCOPE Tcl_Obj *	TclPtrSetVarIdx(Tcl_Interp *interp,
+			    Var *varPtr, Var *arrayPtr, Tcl_Obj *part1Ptr,
+			    Tcl_Obj *part2Ptr, Tcl_Obj *newValuePtr,
+			    const int flags, int index);
+MODULE_SCOPE Tcl_Obj *	TclPtrIncrObjVarIdx(Tcl_Interp *interp,
+			    Var *varPtr, Var *arrayPtr, Tcl_Obj *part1Ptr,
+			    Tcl_Obj *part2Ptr, Tcl_Obj *incrPtr,
+			    const int flags, int index);
+MODULE_SCOPE int	TclPtrObjMakeUpvarIdx(Tcl_Interp *interp,
+			    Var *otherPtr, Tcl_Obj *myNamePtr, int myFlags,
+			    int index);
+MODULE_SCOPE int	TclPtrUnsetVarIdx(Tcl_Interp *interp, Var *varPtr,
+			    Var *arrayPtr, Tcl_Obj *part1Ptr,
+			    Tcl_Obj *part2Ptr, const int flags,
+			    int index);
+MODULE_SCOPE void	TclInvalidateNsPath(Namespace *nsPtr);
+MODULE_SCOPE void	TclFindArrayPtrElements(Var *arrayPtr,
+			    Tcl_HashTable *tablePtr);
+
+/*
+ * The new extended interface to the variable traces.
+ */
+
+MODULE_SCOPE int	TclObjCallVarTraces(Interp *iPtr, Var *arrayPtr,
+			    Var *varPtr, Tcl_Obj *part1Ptr, Tcl_Obj *part2Ptr,
+			    int flags, int leaveErrMsg, int index);
+
+/*
+ * So tclObj.c and tclDictObj.c can share these implementations.
+ */
+
+MODULE_SCOPE int	TclCompareObjKeys(void *keyPtr, Tcl_HashEntry *hPtr);
+MODULE_SCOPE void	TclFreeObjEntry(Tcl_HashEntry *hPtr);
+MODULE_SCOPE unsigned	TclHashObjKey(Tcl_HashTable *tablePtr, void *keyPtr);
+
+MODULE_SCOPE int	TclFullFinalizationRequested(void);
+
+/*
+ *----------------------------------------------------------------
+ * Macros used by the Tcl core to create and release Tcl objects.
+ * TclNewObj(objPtr) creates a new object denoting an empty string.
+ * TclDecrRefCount(objPtr) decrements the object's reference count, and frees
+ * the object if its reference count is zero. These macros are inline versions
+ * of Tcl_NewObj() and Tcl_DecrRefCount(). Notice that the names differ in not
+ * having a "_" after the "Tcl". Notice also that these macros reference their
+ * argument more than once, so you should avoid calling them with an
+ * expression that is expensive to compute or has side effects. The ANSI C
+ * "prototypes" for these macros are:
+ *
+ * MODULE_SCOPE void	TclNewObj(Tcl_Obj *objPtr);
+ * MODULE_SCOPE void	TclDecrRefCount(Tcl_Obj *objPtr);
+ *
+ * These macros are defined in terms of two macros that depend on memory
+ * allocator in use: TclAllocObjStorage, TclFreeObjStorage. They are defined
+ * below.
+ *----------------------------------------------------------------
+ */
+
+/*
+ * DTrace object allocation probe macros.
+ */
+
+#ifdef USE_DTRACE
+#ifndef _TCLDTRACE_H
+typedef const char *TclDTraceStr;
+#include "tclDTrace.h"
+#endif
+#define	TCL_DTRACE_OBJ_CREATE(objPtr)	TCL_OBJ_CREATE(objPtr)
+#define	TCL_DTRACE_OBJ_FREE(objPtr)	TCL_OBJ_FREE(objPtr)
+#else /* USE_DTRACE */
+#define	TCL_DTRACE_OBJ_CREATE(objPtr)	{}
+#define	TCL_DTRACE_OBJ_FREE(objPtr)	{}
+#endif /* USE_DTRACE */
+
+#ifdef TCL_COMPILE_STATS
+#  define TclIncrObjsAllocated() \
+    tclObjsAlloced++
+#  define TclIncrObjsFreed() \
+    tclObjsFreed++
+#else
+#  define TclIncrObjsAllocated()
+#  define TclIncrObjsFreed()
+#endif /* TCL_COMPILE_STATS */
+
+#  define TclAllocObjStorage(objPtr)		\
+	TclAllocObjStorageEx(NULL, (objPtr))
+
+#  define TclFreeObjStorage(objPtr)		\
+	TclFreeObjStorageEx(NULL, (objPtr))
+
+#ifndef TCL_MEM_DEBUG
+# define TclNewObj(objPtr) \
+    TclIncrObjsAllocated(); \
+    TclAllocObjStorage(objPtr); \
+    (objPtr)->refCount = 0; \
+    (objPtr)->bytes    = tclEmptyStringRep; \
+    (objPtr)->length   = 0; \
+    (objPtr)->typePtr  = NULL; \
+    TCL_DTRACE_OBJ_CREATE(objPtr)
+
+/*
+ * Invalidate the string rep first so we can use the bytes value for our
+ * pointer chain, and signal an obj deletion (as opposed to shimmering) with
+ * 'length == -1'.
+ * Use empty 'if ; else' to handle use in unbraced outer if/else conditions.
+ */
+
+# define TclDecrRefCount(objPtr) \
+    if ((objPtr)->refCount-- > 1) ; else { \
+	if (!(objPtr)->typePtr || !(objPtr)->typePtr->freeIntRepProc) { \
+	    TCL_DTRACE_OBJ_FREE(objPtr); \
+	    if ((objPtr)->bytes \
+		    && ((objPtr)->bytes != tclEmptyStringRep)) { \
+		ckfree((char *) (objPtr)->bytes); \
+	    } \
+	    (objPtr)->length = -1; \
+	    TclFreeObjStorage(objPtr); \
+	    TclIncrObjsFreed(); \
+	} else { \
+	    TclFreeObj(objPtr); \
+	} \
+    }
+
+#if defined(PURIFY)
+
+/*
+ * The PURIFY mode is like the regular mode, but instead of doing block
+ * Tcl_Obj allocation and keeping a freed list for efficiency, it always
+ * allocates and frees a single Tcl_Obj so that tools like Purify can better
+ * track memory leaks.
+ */
+
+#  define TclAllocObjStorageEx(interp, objPtr) \
+	(objPtr) = (Tcl_Obj *) ckalloc(sizeof(Tcl_Obj))
+
+#  define TclFreeObjStorageEx(interp, objPtr) \
+	ckfree((char *) (objPtr))
+
+#undef USE_THREAD_ALLOC
+#undef USE_TCLALLOC
+#elif defined(TCL_THREADS) && defined(USE_THREAD_ALLOC)
+
+/*
+ * The TCL_THREADS mode is like the regular mode but allocates Tcl_Obj's from
+ * per-thread caches.
+ */
+
+MODULE_SCOPE Tcl_Obj *	TclThreadAllocObj(void);
+MODULE_SCOPE void	TclThreadFreeObj(Tcl_Obj *);
+MODULE_SCOPE Tcl_Mutex *TclpNewAllocMutex(void);
+MODULE_SCOPE void	TclFreeAllocCache(void *);
+MODULE_SCOPE void *	TclpGetAllocCache(void);
+MODULE_SCOPE void	TclpSetAllocCache(void *);
+MODULE_SCOPE void	TclpFreeAllocMutex(Tcl_Mutex *mutex);
+MODULE_SCOPE void	TclpFreeAllocCache(void *);
+
+/*
+ * These macros need to be kept in sync with the code of TclThreadAllocObj()
+ * and TclThreadFreeObj().
+ *
+ * Note that the optimiser should resolve the case (interp==NULL) at compile
+ * time.
+ */
+
+#  define ALLOC_NOBJHIGH 1200
+
+#  define TclAllocObjStorageEx(interp, objPtr)				\
+    do {								\
+	AllocCache *cachePtr;						\
+	if (((interp) == NULL) ||					\
+		((cachePtr = ((Interp *)(interp))->allocCache),		\
+			(cachePtr->numObjects == 0))) {			\
+	    (objPtr) = TclThreadAllocObj();				\
+	} else {							\
+	    (objPtr) = cachePtr->firstObjPtr;				\
+	    cachePtr->firstObjPtr = (objPtr)->internalRep.twoPtrValue.ptr1; \
+	    --cachePtr->numObjects;					\
+	}								\
+    } while (0)
+
+#  define TclFreeObjStorageEx(interp, objPtr)				\
+    do {								\
+	AllocCache *cachePtr;						\
+	if (((interp) == NULL) ||					\
+		((cachePtr = ((Interp *)(interp))->allocCache),		\
+			((cachePtr->numObjects == 0) ||			\
+			(cachePtr->numObjects >= ALLOC_NOBJHIGH)))) {	\
+	    TclThreadFreeObj(objPtr);					\
+	} else {							\
+	    (objPtr)->internalRep.twoPtrValue.ptr1 = cachePtr->firstObjPtr; \
+	    cachePtr->firstObjPtr = objPtr;				\
+	    ++cachePtr->numObjects;					\
+	}								\
+    } while (0)
+
+#else /* not PURIFY or USE_THREAD_ALLOC */
+
+#if defined(USE_TCLALLOC) && USE_TCLALLOC
+    MODULE_SCOPE void TclFinalizeAllocSubsystem();
+    MODULE_SCOPE void TclInitAlloc();
+#else
+#   define USE_TCLALLOC 0
+#endif
+
+#ifdef TCL_THREADS
+/* declared in tclObj.c */
+MODULE_SCOPE Tcl_Mutex	tclObjMutex;
+#endif
+
+#  define TclAllocObjStorageEx(interp, objPtr) \
+    do {								\
+	Tcl_MutexLock(&tclObjMutex);					\
+	if (tclFreeObjList == NULL) {					\
+	    TclAllocateFreeObjects();					\
+	}								\
+	(objPtr) = tclFreeObjList;					\
+	tclFreeObjList = (Tcl_Obj *)					\
+		tclFreeObjList->internalRep.twoPtrValue.ptr1;		\
+	Tcl_MutexUnlock(&tclObjMutex);					\
+    } while (0)
+
+#  define TclFreeObjStorageEx(interp, objPtr) \
+    do {							       \
+	Tcl_MutexLock(&tclObjMutex);				       \
+	(objPtr)->internalRep.twoPtrValue.ptr1 = (void *) tclFreeObjList; \
+	tclFreeObjList = (objPtr);				       \
+	Tcl_MutexUnlock(&tclObjMutex);				       \
+    } while (0)
+#endif
+
+#else /* TCL_MEM_DEBUG */
+MODULE_SCOPE void	TclDbInitNewObj(Tcl_Obj *objPtr, const char *file,
+			    int line);
+
+# define TclDbNewObj(objPtr, file, line) \
+    do { \
+	TclIncrObjsAllocated();						\
+	(objPtr) = (Tcl_Obj *)						\
+		Tcl_DbCkalloc(sizeof(Tcl_Obj), (file), (line));		\
+	TclDbInitNewObj((objPtr), (file), (line));			\
+	TCL_DTRACE_OBJ_CREATE(objPtr);					\
+    } while (0)
+
+# define TclNewObj(objPtr) \
+    TclDbNewObj(objPtr, __FILE__, __LINE__);
+
+# define TclDecrRefCount(objPtr) \
+    Tcl_DbDecrRefCount(objPtr, __FILE__, __LINE__)
+
+# define TclNewListObjDirect(objc, objv) \
+    TclDbNewListObjDirect(objc, objv, __FILE__, __LINE__)
+
+#undef USE_THREAD_ALLOC
+#endif /* TCL_MEM_DEBUG */
+
+/*
+ *----------------------------------------------------------------
+ * Macro used by the Tcl core to set a Tcl_Obj's string representation to a
+ * copy of the "len" bytes starting at "bytePtr". This code works even if the
+ * byte array contains NULLs as long as the length is correct. Because "len"
+ * is referenced multiple times, it should be as simple an expression as
+ * possible. The ANSI C "prototype" for this macro is:
+ *
+ * MODULE_SCOPE void TclInitStringRep(Tcl_Obj *objPtr, char *bytePtr, int len);
+ *
+ * This macro should only be called on an unshared objPtr where
+ *  objPtr->typePtr->freeIntRepProc == NULL
+ *----------------------------------------------------------------
+ */
+
+#define TclInitStringRep(objPtr, bytePtr, len) \
+    if ((len) == 0) { \
+	(objPtr)->bytes	 = tclEmptyStringRep; \
+	(objPtr)->length = 0; \
+    } else { \
+	(objPtr)->bytes = (char *) ckalloc((unsigned) ((len) + 1)); \
+	memcpy((objPtr)->bytes, (bytePtr), (unsigned) (len)); \
+	(objPtr)->bytes[len] = '\0'; \
+	(objPtr)->length = (len); \
+    }
+
+/*
+ *----------------------------------------------------------------
+ * Macro used by the Tcl core to get the string representation's byte array
+ * pointer from a Tcl_Obj. This is an inline version of Tcl_GetString(). The
+ * macro's expression result is the string rep's byte pointer which might be
+ * NULL. The bytes referenced by this pointer must not be modified by the
+ * caller. The ANSI C "prototype" for this macro is:
+ *
+ * MODULE_SCOPE char *	TclGetString(Tcl_Obj *objPtr);
+ *----------------------------------------------------------------
+ */
+
+#define TclGetString(objPtr) \
+    ((objPtr)->bytes? (objPtr)->bytes : Tcl_GetString((objPtr)))
+
+#define TclGetStringFromObj(objPtr, lenPtr) \
+    ((objPtr)->bytes \
+	    ? (*(lenPtr) = (objPtr)->length, (objPtr)->bytes)	\
+	    : Tcl_GetStringFromObj((objPtr), (lenPtr)))
+
+/*
+ *----------------------------------------------------------------
+ * Macro used by the Tcl core to clean out an object's internal
+ * representation. Does not actually reset the rep's bytes. The ANSI C
+ * "prototype" for this macro is:
+ *
+ * MODULE_SCOPE void	TclFreeIntRep(Tcl_Obj *objPtr);
+ *----------------------------------------------------------------
+ */
+
+#define TclFreeIntRep(objPtr) \
+    if ((objPtr)->typePtr != NULL) { \
+	if ((objPtr)->typePtr->freeIntRepProc != NULL) { \
+	    (objPtr)->typePtr->freeIntRepProc(objPtr); \
+	} \
+	(objPtr)->typePtr = NULL; \
+    }
+
+/*
+ *----------------------------------------------------------------
+ * Macro used by the Tcl core to clean out an object's string representation.
+ * The ANSI C "prototype" for this macro is:
+ *
+ * MODULE_SCOPE void	TclInvalidateStringRep(Tcl_Obj *objPtr);
+ *----------------------------------------------------------------
+ */
+
+#define TclInvalidateStringRep(objPtr) \
+    if (objPtr->bytes != NULL) { \
+	if (objPtr->bytes != tclEmptyStringRep) { \
+	    ckfree((char *) objPtr->bytes); \
+	} \
+	objPtr->bytes = NULL; \
+    }
+
+/*
+ *----------------------------------------------------------------
+ * Macros used by the Tcl core to grow Tcl_Token arrays. They use the same
+ * growth algorithm as used in tclStringObj.c for growing strings. The ANSI C
+ * "prototype" for this macro is:
+ *
+ * MODULE_SCOPE void	TclGrowTokenArray(Tcl_Token *tokenPtr, int used,
+ *				int available, int append,
+ *				Tcl_Token *staticPtr);
+ * MODULE_SCOPE void	TclGrowParseTokenArray(Tcl_Parse *parsePtr,
+ *				int append);
+ *----------------------------------------------------------------
+ */
+
+/* General tuning for minimum growth in Tcl growth algorithms */
+#ifndef TCL_MIN_GROWTH
+#  ifdef TCL_GROWTH_MIN_ALLOC
+     /* Support for any legacy tuners */
+#    define TCL_MIN_GROWTH TCL_GROWTH_MIN_ALLOC
+#  else
+#    define TCL_MIN_GROWTH 1024
+#  endif
+#endif
+
+/* Token growth tuning, default to the general value. */
+#ifndef TCL_MIN_TOKEN_GROWTH
+#define TCL_MIN_TOKEN_GROWTH TCL_MIN_GROWTH/sizeof(Tcl_Token)
+#endif
+
+#define TCL_MAX_TOKENS (int)(UINT_MAX / sizeof(Tcl_Token))
+#define TclGrowTokenArray(tokenPtr, used, available, append, staticPtr)	\
+    do {								\
+	int _needed = (used) + (append);					\
+	if (_needed > TCL_MAX_TOKENS) {					\
+	    Tcl_Panic("max # of tokens for a Tcl parse (%d) exceeded",	\
+		    TCL_MAX_TOKENS);					\
+	}								\
+	if (_needed > (available)) {					\
+	    int allocated = 2 * _needed;					\
+	    Tcl_Token *oldPtr = (tokenPtr);				\
+	    Tcl_Token *newPtr;						\
+	    if (oldPtr == (staticPtr)) {				\
+		oldPtr = NULL;						\
+	    }								\
+	    if (allocated > TCL_MAX_TOKENS) {				\
+		allocated = TCL_MAX_TOKENS;				\
+	    }								\
+	    newPtr = (Tcl_Token *) attemptckrealloc((char *) oldPtr,	\
+		    (unsigned int) (allocated * sizeof(Tcl_Token)));	\
+	    if (newPtr == NULL) {					\
+		allocated = _needed + (append) + TCL_MIN_TOKEN_GROWTH;	\
+		if (allocated > TCL_MAX_TOKENS) {			\
+		    allocated = TCL_MAX_TOKENS;				\
+		}							\
+		newPtr = (Tcl_Token *) ckrealloc((char *) oldPtr,	\
+			(unsigned int) (allocated * sizeof(Tcl_Token))); \
+	    }								\
+	    (available) = allocated;					\
+	    if (oldPtr == NULL) {					\
+		memcpy(newPtr, staticPtr,				\
+			(size_t) ((used) * sizeof(Tcl_Token)));		\
+	    }								\
+	    (tokenPtr) = newPtr;					\
+	}								\
+    } while (0)
+
+#define TclGrowParseTokenArray(parsePtr, append)			\
+    TclGrowTokenArray((parsePtr)->tokenPtr, (parsePtr)->numTokens,	\
+	    (parsePtr)->tokensAvailable, (append),			\
+	    (parsePtr)->staticTokens)
+
+/*
+ *----------------------------------------------------------------
+ * Macro used by the Tcl core get a unicode char from a utf string. It checks
+ * to see if we have a one-byte utf char before calling the real
+ * Tcl_UtfToUniChar, as this will save a lot of time for primarily ASCII
+ * string handling. The macro's expression result is 1 for the 1-byte case or
+ * the result of Tcl_UtfToUniChar. The ANSI C "prototype" for this macro is:
+ *
+ * MODULE_SCOPE int	TclUtfToUniChar(const char *string, Tcl_UniChar *ch);
+ *----------------------------------------------------------------
+ */
+
+#define TclUtfToUniChar(str, chPtr) \
+	((((unsigned char) *(str)) < 0xC0) ?		\
+	    ((*(chPtr) = (unsigned char) *(str)), 1)	\
+	    : Tcl_UtfToUniChar(str, chPtr))
+
+/*
+ *----------------------------------------------------------------
+ * Macro counterpart of the Tcl_NumUtfChars() function. To be used in speed-
+ * -sensitive points where it pays to avoid a function call in the common case
+ * of counting along a string of all one-byte characters.  The ANSI C
+ * "prototype" for this macro is:
+ *
+ * MODULE_SCOPE void	TclNumUtfChars(int numChars, const char *bytes,
+ *				int numBytes);
+ *----------------------------------------------------------------
+ */
+
+#define TclNumUtfChars(numChars, bytes, numBytes) \
+    do { \
+	int _count, _i = (numBytes); \
+	unsigned char *_str = (unsigned char *) (bytes); \
+	while (_i && (*_str < 0xC0)) { _i--; _str++; } \
+	_count = (numBytes) - _i; \
+	if (_i) { \
+	    _count += Tcl_NumUtfChars((bytes) + _count, _i); \
+	} \
+	(numChars) = _count; \
+    } while (0);
+
+/*
+ *----------------------------------------------------------------
+ * Macro that encapsulates the logic that determines when it is safe to
+ * interpret a string as a byte array directly. In summary, the object must be
+ * a byte array and must not have a string representation (as the operations
+ * that it is used in are defined on strings, not byte arrays). Theoretically
+ * it is possible to also be efficient in the case where the object's bytes
+ * field is filled by generation from the byte array (c.f. list canonicality)
+ * but we don't do that at the moment since this is purely about efficiency.
+ * The ANSI C "prototype" for this macro is:
+ *
+ * MODULE_SCOPE int	TclIsPureByteArray(Tcl_Obj *objPtr);
+ *----------------------------------------------------------------
+ */
+
+#define TclIsPureByteArray(objPtr) \
+	(((objPtr)->typePtr==&tclByteArrayType) && ((objPtr)->bytes==NULL))
+
+/*
+ *----------------------------------------------------------------
+ * Macro used by the Tcl core to compare Unicode strings. On big-endian
+ * systems we can use the more efficient memcmp, but this would not be
+ * lexically correct on little-endian systems. The ANSI C "prototype" for
+ * this macro is:
+ *
+ * MODULE_SCOPE int	TclUniCharNcmp(const Tcl_UniChar *cs,
+ *			    const Tcl_UniChar *ct, unsigned long n);
+ *----------------------------------------------------------------
+ */
+
+#ifdef WORDS_BIGENDIAN
+#   define TclUniCharNcmp(cs,ct,n) memcmp((cs),(ct),(n)*sizeof(Tcl_UniChar))
+#else /* !WORDS_BIGENDIAN */
+#   define TclUniCharNcmp Tcl_UniCharNcmp
+#endif /* WORDS_BIGENDIAN */
+
+/*
+ *----------------------------------------------------------------
+ * Macro used by the Tcl core to increment a namespace's export epoch
+ * counter. The ANSI C "prototype" for this macro is:
+ *
+ * MODULE_SCOPE void	TclInvalidateNsCmdLookup(Namespace *nsPtr);
+ *----------------------------------------------------------------
+ */
+
+#define TclInvalidateNsCmdLookup(nsPtr) \
+    if ((nsPtr)->numExportPatterns) {		\
+	(nsPtr)->exportLookupEpoch++;		\
+    }						\
+    if ((nsPtr)->commandPathLength) {		\
+	(nsPtr)->cmdRefEpoch++;			\
+    }
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * Core procedure added to libtommath for bignum manipulation.
+ *
+ *----------------------------------------------------------------------
+ */
+
+MODULE_SCOPE Tcl_PackageInitProc TclTommath_Init;
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * External (platform specific) initialization routine, these declarations
+ * explicitly don't use EXTERN since this code does not get compiled into the
+ * library:
+ *
+ *----------------------------------------------------------------------
+ */
+
+MODULE_SCOPE Tcl_PackageInitProc TclplatformtestInit;
+MODULE_SCOPE Tcl_PackageInitProc TclObjTest_Init;
+MODULE_SCOPE Tcl_PackageInitProc TclThread_Init;
+MODULE_SCOPE Tcl_PackageInitProc Procbodytest_Init;
+MODULE_SCOPE Tcl_PackageInitProc Procbodytest_SafeInit;
+
+/*
+ *----------------------------------------------------------------
+ * Macro used by the Tcl core to check whether a pattern has any characters
+ * special to [string match]. The ANSI C "prototype" for this macro is:
+ *
+ * MODULE_SCOPE int	TclMatchIsTrivial(const char *pattern);
+ *----------------------------------------------------------------
+ */
+
+#define TclMatchIsTrivial(pattern) \
+    (strpbrk((pattern), "*[?\\") == NULL)
+
+/*
+ *----------------------------------------------------------------
+ * Macros used by the Tcl core to set a Tcl_Obj's numeric representation
+ * avoiding the corresponding function calls in time critical parts of the
+ * core. They should only be called on unshared objects. The ANSI C
+ * "prototypes" for these macros are:
+ *
+ * MODULE_SCOPE void	TclSetIntObj(Tcl_Obj *objPtr, int intValue);
+ * MODULE_SCOPE void	TclSetLongObj(Tcl_Obj *objPtr, long longValue);
+ * MODULE_SCOPE void	TclSetBooleanObj(Tcl_Obj *objPtr, long boolValue);
+ * MODULE_SCOPE void	TclSetWideIntObj(Tcl_Obj *objPtr, Tcl_WideInt w);
+ * MODULE_SCOPE void	TclSetDoubleObj(Tcl_Obj *objPtr, double d);
+ *----------------------------------------------------------------
+ */
+
+#define TclSetLongObj(objPtr, i) \
+    do {						\
+	TclInvalidateStringRep(objPtr);			\
+	TclFreeIntRep(objPtr);				\
+	(objPtr)->internalRep.longValue = (long)(i);	\
+	(objPtr)->typePtr = &tclIntType;		\
+    } while (0)
+
+#define TclSetIntObj(objPtr, l) \
+    TclSetLongObj(objPtr, l)
+
+/*
+ * NOTE: There is to be no such thing as a "pure" boolean. Boolean values set
+ * programmatically go straight to being "int" Tcl_Obj's, with value 0 or 1.
+ * The only "boolean" Tcl_Obj's shall be those holding the cached boolean
+ * value of strings like: "yes", "no", "true", "false", "on", "off".
+ */
+
+#define TclSetBooleanObj(objPtr, b) \
+    TclSetLongObj(objPtr, (b)!=0);
+
+#ifndef TCL_WIDE_INT_IS_LONG
+#define TclSetWideIntObj(objPtr, w) \
+    do {							\
+	TclInvalidateStringRep(objPtr);				\
+	TclFreeIntRep(objPtr);					\
+	(objPtr)->internalRep.wideValue = (Tcl_WideInt)(w);	\
+	(objPtr)->typePtr = &tclWideIntType;			\
+    } while (0)
+#endif
+
+#define TclSetDoubleObj(objPtr, d) \
+    do {							\
+	TclInvalidateStringRep(objPtr);				\
+	TclFreeIntRep(objPtr);					\
+	(objPtr)->internalRep.doubleValue = (double)(d);	\
+	(objPtr)->typePtr = &tclDoubleType;			\
+    } while (0)
+
+/*
+ *----------------------------------------------------------------
+ * Macros used by the Tcl core to create and initialise objects of standard
+ * types, avoiding the corresponding function calls in time critical parts of
+ * the core. The ANSI C "prototypes" for these macros are:
+ *
+ * MODULE_SCOPE void	TclNewIntObj(Tcl_Obj *objPtr, int i);
+ * MODULE_SCOPE void	TclNewLongObj(Tcl_Obj *objPtr, long l);
+ * MODULE_SCOPE void	TclNewBooleanObj(Tcl_Obj *objPtr, int b);
+ * MODULE_SCOPE void	TclNewWideObj(Tcl_Obj *objPtr, Tcl_WideInt w);
+ * MODULE_SCOPE void	TclNewDoubleObj(Tcl_Obj *objPtr, double d);
+ * MODULE_SCOPE void	TclNewStringObj(Tcl_Obj *objPtr, char *s, int len);
+ * MODULE_SCOPE void	TclNewLiteralStringObj(Tcl_Obj*objPtr, char*sLiteral);
+ *
+ *----------------------------------------------------------------
+ */
+
+#ifndef TCL_MEM_DEBUG
+#define TclNewLongObj(objPtr, i) \
+    do {						\
+	TclIncrObjsAllocated();				\
+	TclAllocObjStorage(objPtr);			\
+	(objPtr)->refCount = 0;				\
+	(objPtr)->bytes = NULL;				\
+	(objPtr)->internalRep.longValue = (long)(i);	\
+	(objPtr)->typePtr = &tclIntType;		\
+	TCL_DTRACE_OBJ_CREATE(objPtr);			\
+    } while (0)
+
+#define TclNewIntObj(objPtr, l) \
+    TclNewLongObj(objPtr, l)
+
+/*
+ * NOTE: There is to be no such thing as a "pure" boolean.
+ * See comment above TclSetBooleanObj macro above.
+ */
+#define TclNewBooleanObj(objPtr, b) \
+    TclNewLongObj((objPtr), (b)!=0)
+
+#define TclNewDoubleObj(objPtr, d) \
+    do {							\
+	TclIncrObjsAllocated();					\
+	TclAllocObjStorage(objPtr);				\
+	(objPtr)->refCount = 0;					\
+	(objPtr)->bytes = NULL;					\
+	(objPtr)->internalRep.doubleValue = (double)(d);	\
+	(objPtr)->typePtr = &tclDoubleType;			\
+	TCL_DTRACE_OBJ_CREATE(objPtr);				\
+    } while (0)
+
+#define TclNewStringObj(objPtr, s, len) \
+    do {							\
+	TclIncrObjsAllocated();					\
+	TclAllocObjStorage(objPtr);				\
+	(objPtr)->refCount = 0;					\
+	TclInitStringRep((objPtr), (s), (len));			\
+	(objPtr)->typePtr = NULL;				\
+	TCL_DTRACE_OBJ_CREATE(objPtr);				\
+    } while (0)
+
+#else /* TCL_MEM_DEBUG */
+#define TclNewIntObj(objPtr, i) \
+    (objPtr) = Tcl_NewIntObj(i)
+
+#define TclNewLongObj(objPtr, l) \
+    (objPtr) = Tcl_NewLongObj(l)
+
+#define TclNewBooleanObj(objPtr, b) \
+    (objPtr) = Tcl_NewBooleanObj(b)
+
+#define TclNewDoubleObj(objPtr, d) \
+    (objPtr) = Tcl_NewDoubleObj(d)
+
+#define TclNewStringObj(objPtr, s, len) \
+    (objPtr) = Tcl_NewStringObj((s), (len))
+#endif /* TCL_MEM_DEBUG */
+
+/*
+ * The sLiteral argument *must* be a string literal; the incantation with
+ * sizeof(sLiteral "") will fail to compile otherwise.
+ */
+#define TclNewLiteralStringObj(objPtr, sLiteral) \
+    TclNewStringObj((objPtr), (sLiteral), (int) (sizeof(sLiteral "") - 1))
+
+/*
+ *----------------------------------------------------------------
+ * Convenience macros for DStrings.
+ * The ANSI C "prototypes" for these macros are:
+ *
+ * MODULE_SCOPE char * TclDStringAppendLiteral(Tcl_DString *dsPtr,
+ *			const char *sLiteral);
+ * MODULE_SCOPE void   TclDStringClear(Tcl_DString *dsPtr);
+ */
+
+#define TclDStringAppendLiteral(dsPtr, sLiteral) \
+    Tcl_DStringAppend((dsPtr), (sLiteral), (int) (sizeof(sLiteral "") - 1))
+#define TclDStringClear(dsPtr) \
+    Tcl_DStringSetLength((dsPtr), 0)
+
+/*
+ *----------------------------------------------------------------
+ * Macros used by the Tcl core to test for some special double values.
+ * The ANSI C "prototypes" for these macros are:
+ *
+ * MODULE_SCOPE int	TclIsInfinite(double d);
+ * MODULE_SCOPE int	TclIsNaN(double d);
+ */
+
+#ifdef _MSC_VER
+#    define TclIsInfinite(d)	(!(_finite((d))))
+#    define TclIsNaN(d)		(_isnan((d)))
+#else
+#    define TclIsInfinite(d)	((d) > DBL_MAX || (d) < -DBL_MAX)
+#    ifdef NO_ISNAN
+#	 define TclIsNaN(d)	((d) != (d))
+#    else
+#	 define TclIsNaN(d)	(isnan(d))
+#    endif
+#endif
+
+/*
+ * ----------------------------------------------------------------------
+ * Macro to use to find the offset of a field in a structure. Computes number
+ * of bytes from beginning of structure to a given field.
+ */
+
+#ifdef offsetof
+#define TclOffset(type, field) ((int) offsetof(type, field))
+#else
+#define TclOffset(type, field) ((int) ((char *) &((type *) 0)->field))
+#endif
+
+/*
+ *----------------------------------------------------------------
+ * Inline version of Tcl_GetCurrentNamespace and Tcl_GetGlobalNamespace.
+ */
+
+#define TclGetCurrentNamespace(interp) \
+    (Tcl_Namespace *) ((Interp *)(interp))->varFramePtr->nsPtr
+
+#define TclGetGlobalNamespace(interp) \
+    (Tcl_Namespace *) ((Interp *)(interp))->globalNsPtr
+
+/*
+ *----------------------------------------------------------------
+ * Inline version of TclCleanupCommand; still need the function as it is in
+ * the internal stubs, but the core can use the macro instead.
+ */
+
+#define TclCleanupCommandMacro(cmdPtr) \
+    if ((cmdPtr)->refCount-- <= 1) { \
+	ckfree((char *) (cmdPtr));\
+    }
+
+/*
+ *----------------------------------------------------------------
+ * Inline versions of Tcl_LimitReady() and Tcl_LimitExceeded to limit number
+ * of calls out of the critical path. Note that this code isn't particularly
+ * readable; the non-inline version (in tclInterp.c) is much easier to
+ * understand. Note also that these macros takes different args (iPtr->limit)
+ * to the non-inline version.
+ */
+
+#define TclLimitExceeded(limit) ((limit).exceeded != 0)
+
+#define TclLimitReady(limit)						\
+    (((limit).active == 0) ? 0 :					\
+    (++(limit).granularityTicker,					\
+    ((((limit).active & TCL_LIMIT_COMMANDS) &&				\
+	    (((limit).cmdGranularity == 1) ||				\
+	    ((limit).granularityTicker % (limit).cmdGranularity == 0)))	\
+	    ? 1 :							\
+    (((limit).active & TCL_LIMIT_TIME) &&				\
+	    (((limit).timeGranularity == 1) ||				\
+	    ((limit).granularityTicker % (limit).timeGranularity == 0)))\
+	    ? 1 : 0)))
+
+/*
+ * Compile-time assertions: these produce a compile time error if the
+ * expression is not known to be true at compile time. If the assertion is
+ * known to be false, the compiler (or optimizer?) will error out with
+ * "division by zero". If the assertion cannot be evaluated at compile time,
+ * the compiler will error out with "non-static initializer".
+ *
+ * Adapted with permission from
+ * http://www.pixelbeat.org/programming/gcc/static_assert.html
+ */
+
+#define TCL_CT_ASSERT(e) \
+    {enum { ct_assert_value = 1/(!!(e)) };}
+
+/*
+ *----------------------------------------------------------------
+ * Allocator for small structs (<=sizeof(Tcl_Obj)) using the Tcl_Obj pool.
+ * Only checked at compile time.
+ *
+ * ONLY USE FOR CONSTANT nBytes.
+ *
+ * DO NOT LET THEM CROSS THREAD BOUNDARIES
+ *----------------------------------------------------------------
+ */
+
+#define TclSmallAlloc(nbytes, memPtr) \
+    TclSmallAllocEx(NULL, (nbytes), (memPtr))
+
+#define TclSmallFree(memPtr) \
+    TclSmallFreeEx(NULL, (memPtr))
+
+#ifndef TCL_MEM_DEBUG
+#define TclSmallAllocEx(interp, nbytes, memPtr) \
+    do {								\
+	Tcl_Obj *_objPtr;						\
+	TCL_CT_ASSERT((nbytes)<=sizeof(Tcl_Obj));			\
+	TclIncrObjsAllocated();						\
+	TclAllocObjStorageEx((interp), (_objPtr));			\
+	memPtr = (ClientData) (_objPtr);					\
+    } while (0)
+
+#define TclSmallFreeEx(interp, memPtr) \
+    do {								\
+	TclFreeObjStorageEx((interp), (Tcl_Obj *) (memPtr));		\
+	TclIncrObjsFreed();						\
+    } while (0)
+
+#else    /* TCL_MEM_DEBUG */
+#define TclSmallAllocEx(interp, nbytes, memPtr) \
+    do {								\
+	Tcl_Obj *_objPtr;						\
+	TCL_CT_ASSERT((nbytes)<=sizeof(Tcl_Obj));			\
+	TclNewObj(_objPtr);						\
+	memPtr = (ClientData) _objPtr;					\
+    } while (0)
+
+#define TclSmallFreeEx(interp, memPtr) \
+    do {								\
+	Tcl_Obj *_objPtr = (Tcl_Obj *) memPtr;				\
+	_objPtr->bytes = NULL;						\
+	_objPtr->typePtr = NULL;					\
+	_objPtr->refCount = 1;						\
+	TclDecrRefCount(_objPtr);					\
+    } while (0)
+#endif   /* TCL_MEM_DEBUG */
+
+/*
+ * Support for Clang Static Analyzer <http://clang-analyzer.llvm.org>
+ */
+
+#if defined(PURIFY) && defined(__clang__)
+#if __has_feature(attribute_analyzer_noreturn) && \
+	!defined(Tcl_Panic) && defined(Tcl_Panic_TCL_DECLARED)
+void Tcl_Panic(const char *, ...) __attribute__((analyzer_noreturn));
+#endif
+#if !defined(CLANG_ASSERT)
+#include <assert.h>
+#define CLANG_ASSERT(x) assert(x)
+#endif
+#elif !defined(CLANG_ASSERT)
+#define CLANG_ASSERT(x)
+#endif /* PURIFY && __clang__ */
+
+/*
+ *----------------------------------------------------------------
+ * Parameters, structs and macros for the non-recursive engine (NRE)
+ *----------------------------------------------------------------
+ */
+
+#define NRE_USE_SMALL_ALLOC	1  /* Only turn off for debugging purposes. */
+#ifndef NRE_ENABLE_ASSERTS
+#define NRE_ENABLE_ASSERTS	0
+#endif
+
+/*
+ * This is the main data struct for representing NR commands. It is designed
+ * to fit in sizeof(Tcl_Obj) in order to exploit the fastest memory allocator
+ * available.
+ */
+
+typedef struct NRE_callback {
+    Tcl_NRPostProc *procPtr;
+    ClientData data[4];
+    struct NRE_callback *nextPtr;
+} NRE_callback;
+
+#define TOP_CB(iPtr) (((Interp *)(iPtr))->execEnvPtr->callbackPtr)
+
+/*
+ * Inline version of Tcl_NRAddCallback.
+ */
+
+#define TclNRAddCallback(interp,postProcPtr,data0,data1,data2,data3) \
+    do {								\
+	NRE_callback *_callbackPtr;					\
+	TCLNR_ALLOC((interp), (_callbackPtr));				\
+	_callbackPtr->procPtr = (postProcPtr);				\
+	_callbackPtr->data[0] = (ClientData)(data0);			\
+	_callbackPtr->data[1] = (ClientData)(data1);			\
+	_callbackPtr->data[2] = (ClientData)(data2);			\
+	_callbackPtr->data[3] = (ClientData)(data3);			\
+	_callbackPtr->nextPtr = TOP_CB(interp);				\
+	TOP_CB(interp) = _callbackPtr;					\
+    } while (0)
+
+#if NRE_USE_SMALL_ALLOC
+#define TCLNR_ALLOC(interp, ptr) \
+    TclSmallAllocEx(interp, sizeof(NRE_callback), (ptr))
+#define TCLNR_FREE(interp, ptr)  TclSmallFreeEx((interp), (ptr))
+#else
+#define TCLNR_ALLOC(interp, ptr) \
+    (ptr = ((ClientData) ckalloc(sizeof(NRE_callback))))
+#define TCLNR_FREE(interp, ptr)  ckfree((char *) (ptr))
+#endif
+
+#if NRE_ENABLE_ASSERTS
+#define NRE_ASSERT(expr) assert((expr))
+#else
+#define NRE_ASSERT(expr)
+#endif
+
+#include "tclIntDecls.h"
+#include "tclIntPlatDecls.h"
+#include "tclTomMathDecls.h"
+
+#if !defined(USE_TCL_STUBS) && !defined(TCL_MEM_DEBUG)
+#define Tcl_AttemptAlloc(size)        TclpAlloc(size)
+#define Tcl_AttemptRealloc(ptr, size) TclpRealloc((ptr), (size))
+#define Tcl_Free(ptr)                 TclpFree(ptr)
+#endif
+
+#endif /* _TCLINT */
+
+/*
+ * Local Variables:
+ * mode: c
+ * c-basic-offset: 4
+ * fill-column: 78
+ * End:
+ */
diff --git a/generic/tclOO.c b/generic/tclOO.c
new file mode 100644
index 0000000..a27f92c
--- /dev/null
+++ b/generic/tclOO.c
@@ -0,0 +1,3073 @@
+/*
+ * tclOO.c --
+ *
+ *	This file contains the object-system core (NB: not Tcl_Obj, but ::oo)
+ *
+ * Copyright (c) 2005-2012 by Donal K. Fellows
+ *
+ * See the file "license.terms" for information on usage and redistribution of
+ * this file, and for a DISCLAIMER OF ALL WARRANTIES.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+#include "tclInt.h"
+#include "tclOOInt.h"
+
+/*
+ * Commands in oo::define.
+ */
+
+static const struct {
+    const char *name;
+    Tcl_ObjCmdProc *objProc;
+    int flag;
+} defineCmds[] = {
+    {"constructor", TclOODefineConstructorObjCmd, 0},
+    {"deletemethod", TclOODefineDeleteMethodObjCmd, 0},
+    {"destructor", TclOODefineDestructorObjCmd, 0},
+    {"export", TclOODefineExportObjCmd, 0},
+    {"forward", TclOODefineForwardObjCmd, 0},
+    {"method", TclOODefineMethodObjCmd, 0},
+    {"renamemethod", TclOODefineRenameMethodObjCmd, 0},
+    {"self", TclOODefineSelfObjCmd, 0},
+    {"unexport", TclOODefineUnexportObjCmd, 0},
+    {NULL, NULL, 0}
+}, objdefCmds[] = {
+    {"class", TclOODefineClassObjCmd, 1},
+    {"deletemethod", TclOODefineDeleteMethodObjCmd, 1},
+    {"export", TclOODefineExportObjCmd, 1},
+    {"forward", TclOODefineForwardObjCmd, 1},
+    {"method", TclOODefineMethodObjCmd, 1},
+    {"renamemethod", TclOODefineRenameMethodObjCmd, 1},
+    {"unexport", TclOODefineUnexportObjCmd, 1},
+    {NULL, NULL, 0}
+};
+
+/*
+ * What sort of size of things we like to allocate.
+ */
+
+#define ALLOC_CHUNK 8
+
+/*
+ * Function declarations for things defined in this file.
+ */
+
+static Class *		AllocClass(Tcl_Interp *interp, Object *useThisObj);
+static Object *		AllocObject(Tcl_Interp *interp, const char *nameStr,
+			    const char *nsNameStr);
+static void		ClearMixins(Class *clsPtr);
+static void		ClearSuperclasses(Class *clsPtr);
+static int		CloneClassMethod(Tcl_Interp *interp, Class *clsPtr,
+			    Method *mPtr, Tcl_Obj *namePtr,
+			    Method **newMPtrPtr);
+static int		CloneObjectMethod(Tcl_Interp *interp, Object *oPtr,
+			    Method *mPtr, Tcl_Obj *namePtr);
+static void		DeletedDefineNamespace(ClientData clientData);
+static void		DeletedObjdefNamespace(ClientData clientData);
+static void		DeletedHelpersNamespace(ClientData clientData);
+static Tcl_NRPostProc	FinalizeAlloc;
+static Tcl_NRPostProc	FinalizeNext;
+static Tcl_NRPostProc	FinalizeObjectCall;
+static int		InitFoundation(Tcl_Interp *interp);
+static void		KillFoundation(ClientData clientData,
+			    Tcl_Interp *interp);
+static void		MyDeleted(ClientData clientData);
+static void		ObjectNamespaceDeleted(ClientData clientData);
+static void		ObjectRenamedTrace(ClientData clientData,
+			    Tcl_Interp *interp, const char *oldName,
+			    const char *newName, int flags);
+static void		ReleaseClassContents(Tcl_Interp *interp,Object *oPtr);
+static inline void	SquelchCachedName(Object *oPtr);
+static void		SquelchedNsFirst(ClientData clientData);
+
+static int		PublicObjectCmd(ClientData clientData,
+			    Tcl_Interp *interp, int objc,
+			    Tcl_Obj *const *objv);
+static int		PublicNRObjectCmd(ClientData clientData,
+			    Tcl_Interp *interp, int objc,
+			    Tcl_Obj *const *objv);
+static int		PrivateObjectCmd(ClientData clientData,
+			    Tcl_Interp *interp, int objc,
+			    Tcl_Obj *const *objv);
+static int		PrivateNRObjectCmd(ClientData clientData,
+			    Tcl_Interp *interp, int objc,
+			    Tcl_Obj *const *objv);
+
+/*
+ * Methods in the oo::object and oo::class classes. First, we define a helper
+ * macro that makes building the method type declaration structure a lot
+ * easier. No point in making life harder than it has to be!
+ *
+ * Note that the core methods don't need clone or free proc callbacks.
+ */
+
+#define DCM(name,visibility,proc) \
+    {name,visibility,\
+	{TCL_OO_METHOD_VERSION_CURRENT,"core method: "#name,proc,NULL,NULL}}
+
+static const DeclaredClassMethod objMethods[] = {
+    DCM("destroy", 1,	TclOO_Object_Destroy),
+    DCM("eval", 0,	TclOO_Object_Eval),
+    DCM("unknown", 0,	TclOO_Object_Unknown),
+    DCM("variable", 0,	TclOO_Object_LinkVar),
+    DCM("varname", 0,	TclOO_Object_VarName),
+    {NULL, 0, {0, NULL, NULL, NULL, NULL}}
+}, clsMethods[] = {
+    DCM("create", 1,	TclOO_Class_Create),
+    DCM("new", 1,	TclOO_Class_New),
+    DCM("createWithNamespace", 0, TclOO_Class_CreateNs),
+    {NULL, 0, {0, NULL, NULL, NULL, NULL}}
+};
+
+/*
+ * And for the oo::class constructor...
+ */
+
+static const Tcl_MethodType classConstructor = {
+    TCL_OO_METHOD_VERSION_CURRENT,
+    "oo::class constructor",
+    TclOO_Class_Constructor, NULL, NULL
+};
+
+/*
+ * Scripted parts of TclOO. First, the master script (cannot be outside this
+ * file).
+ */
+
+static const char *initScript =
+"package ifneeded TclOO " TCLOO_PATCHLEVEL " {# Already present, OK?};"
+"namespace eval ::oo { variable version " TCLOO_VERSION " };"
+"namespace eval ::oo { variable patchlevel " TCLOO_PATCHLEVEL " };";
+/* "tcl_findLibrary tcloo $oo::version $oo::version" */
+/* " tcloo.tcl OO_LIBRARY oo::library;"; */
+
+/*
+ * The scripted part of the definitions of slots.
+ */
+
+static const char *slotScript =
+"::oo::define ::oo::Slot {\n"
+"    method Get {} {error unimplemented}\n"
+"    method Set list {error unimplemented}\n"
+"    method -set args {\n"
+"        uplevel 1 [list [namespace which my] Set $args]\n"
+"    }\n"
+"    method -append args {\n"
+"        uplevel 1 [list [namespace which my] Set [list"
+"                {*}[uplevel 1 [list [namespace which my] Get]] {*}$args]]\n"
+"    }\n"
+"    method -clear {} {uplevel 1 [list [namespace which my] Set {}]}\n"
+"    forward --default-operation my -append\n"
+"    method unknown {args} {\n"
+"        set def --default-operation\n"
+"        if {[llength $args] == 0} {\n"
+"            return [uplevel 1 [list [namespace which my] $def]]\n"
+"        } elseif {![string match -* [lindex $args 0]]} {\n"
+"            return [uplevel 1 [list [namespace which my] $def {*}$args]]\n"
+"        }\n"
+"        next {*}$args\n"
+"    }\n"
+"    export -set -append -clear\n"
+"    unexport unknown destroy\n"
+"}\n"
+"::oo::objdefine ::oo::define::superclass forward --default-operation my -set\n"
+"::oo::objdefine ::oo::define::mixin forward --default-operation my -set\n"
+"::oo::objdefine ::oo::objdefine::mixin forward --default-operation my -set\n";
+
+/*
+ * The body of the <cloned> method of oo::object.
+ */
+
+static const char *clonedBody =
+"foreach p [info procs [info object namespace $originObject]::*] {"
+"    set args [info args $p];"
+"    set idx -1;"
+"    foreach a $args {"
+"        lset args [incr idx] "
+"            [if {[info default $p $a d]} {list $a $d} {list $a}]"
+"    };"
+"    set b [info body $p];"
+"    set p [namespace tail $p];"
+"    proc $p $args $b;"
+"};"
+"foreach v [info vars [info object namespace $originObject]::*] {"
+"    upvar 0 $v vOrigin;"
+"    namespace upvar [namespace current] [namespace tail $v] vNew;"
+"    if {[info exists vOrigin]} {"
+"        if {[array exists vOrigin]} {"
+"            array set vNew [array get vOrigin];"
+"        } else {"
+"            set vNew $vOrigin;"
+"        }"
+"    }"
+"}";
+
+/*
+ * The actual definition of the variable holding the TclOO stub table.
+ */
+
+MODULE_SCOPE const TclOOStubs tclOOStubs;
+
+/*
+ * Convenience macro for getting the foundation from an interpreter.
+ */
+
+#define GetFoundation(interp) \
+	((Foundation *)((Interp *)(interp))->objectFoundation)
+
+/*
+ * Macros to make inspecting into the guts of an object cleaner.
+ *
+ * The ocPtr parameter (only in these macros) is assumed to work fine with
+ * either an oPtr or a classPtr. Note that the roots oo::object and oo::class
+ * have _both_ their object and class flags tagged with ROOT_OBJECT and
+ * ROOT_CLASS respectively.
+ */
+
+#define Deleted(oPtr)		(((Object *)(oPtr))->command == NULL)
+#define IsRootObject(ocPtr)	((ocPtr)->flags & ROOT_OBJECT)
+#define IsRootClass(ocPtr)	((ocPtr)->flags & ROOT_CLASS)
+#define IsRoot(ocPtr)		((ocPtr)->flags & (ROOT_OBJECT|ROOT_CLASS))
+
+/*
+ * ----------------------------------------------------------------------
+ *
+ * TclOOInit --
+ *
+ *	Called to initialise the OO system within an interpreter.
+ *
+ * Result:
+ *	TCL_OK if the setup succeeded. Currently assumed to always work.
+ *
+ * Side effects:
+ *	Creates namespaces, commands, several classes and a number of
+ *	callbacks. Upon return, the OO system is ready for use.
+ *
+ * ----------------------------------------------------------------------
+ */
+
+int
+TclOOInit(
+    Tcl_Interp *interp)		/* The interpreter to install into. */
+{
+    /*
+     * Build the core of the OO system.
+     */
+
+    if (InitFoundation(interp) != TCL_OK) {
+	return TCL_ERROR;
+    }
+
+    /*
+     * Run our initialization script and, if that works, declare the package
+     * to be fully provided.
+     */
+
+    if (Tcl_Eval(interp, initScript) != TCL_OK) {
+	return TCL_ERROR;
+    }
+
+    return Tcl_PkgProvideEx(interp, "TclOO", TCLOO_PATCHLEVEL,
+	    (ClientData) &tclOOStubs);
+}
+
+/*
+ * ----------------------------------------------------------------------
+ *
+ * TclOOGetFoundation --
+ *
+ *	Get a reference to the OO core class system.
+ *
+ * ----------------------------------------------------------------------
+ */
+
+Foundation *
+TclOOGetFoundation(
+    Tcl_Interp *interp)
+{
+    return GetFoundation(interp);
+}
+
+/*
+ * ----------------------------------------------------------------------
+ *
+ * InitFoundation --
+ *
+ *	Set up the core of the OO core class system. This is a structure
+ *	holding references to the magical bits that need to be known about in
+ *	other places, plus the oo::object and oo::class classes.
+ *
+ * ----------------------------------------------------------------------
+ */
+
+static int
+InitFoundation(
+    Tcl_Interp *interp)
+{
+    static Tcl_ThreadDataKey tsdKey;
+    ThreadLocalData *tsdPtr =
+	    Tcl_GetThreadData(&tsdKey, sizeof(ThreadLocalData));
+    Foundation *fPtr = ckalloc(sizeof(Foundation));
+    Tcl_Obj *namePtr, *argsPtr, *bodyPtr;
+    Tcl_DString buffer;
+    Command *cmdPtr;
+    int i;
+
+    /*
+     * Initialize the structure that holds the OO system core. This is
+     * attached to the interpreter via an assocData entry; not very efficient,
+     * but the best we can do without hacking the core more.
+     */
+
+    memset(fPtr, 0, sizeof(Foundation));
+    ((Interp *) interp)->objectFoundation = fPtr;
+    fPtr->interp = interp;
+    fPtr->ooNs = Tcl_CreateNamespace(interp, "::oo", fPtr, NULL);
+    Tcl_Export(interp, fPtr->ooNs, "[a-z]*", 1);
+    fPtr->defineNs = Tcl_CreateNamespace(interp, "::oo::define", fPtr,
+	    DeletedDefineNamespace);
+    fPtr->objdefNs = Tcl_CreateNamespace(interp, "::oo::objdefine", fPtr,
+	    DeletedObjdefNamespace);
+    fPtr->helpersNs = Tcl_CreateNamespace(interp, "::oo::Helpers", fPtr,
+	    DeletedHelpersNamespace);
+    fPtr->epoch = 0;
+    fPtr->tsdPtr = tsdPtr;
+    TclNewLiteralStringObj(fPtr->unknownMethodNameObj, "unknown");
+    TclNewLiteralStringObj(fPtr->constructorName, "<constructor>");
+    TclNewLiteralStringObj(fPtr->destructorName, "<destructor>");
+    TclNewLiteralStringObj(fPtr->clonedName, "<cloned>");
+    TclNewLiteralStringObj(fPtr->defineName, "::oo::define");
+    Tcl_IncrRefCount(fPtr->unknownMethodNameObj);
+    Tcl_IncrRefCount(fPtr->constructorName);
+    Tcl_IncrRefCount(fPtr->destructorName);
+    Tcl_IncrRefCount(fPtr->clonedName);
+    Tcl_IncrRefCount(fPtr->defineName);
+    Tcl_CreateObjCommand(interp, "::oo::UnknownDefinition",
+	    TclOOUnknownDefinition, NULL, NULL);
+    TclNewLiteralStringObj(namePtr, "::oo::UnknownDefinition");
+    Tcl_SetNamespaceUnknownHandler(interp, fPtr->defineNs, namePtr);
+    Tcl_SetNamespaceUnknownHandler(interp, fPtr->objdefNs, namePtr);
+
+    /*
+     * Create the subcommands in the oo::define and oo::objdefine spaces.
+     */
+
+    Tcl_DStringInit(&buffer);
+    for (i=0 ; defineCmds[i].name ; i++) {
+	TclDStringAppendLiteral(&buffer, "::oo::define::");
+	Tcl_DStringAppend(&buffer, defineCmds[i].name, -1);
+	Tcl_CreateObjCommand(interp, Tcl_DStringValue(&buffer),
+		defineCmds[i].objProc, INT2PTR(defineCmds[i].flag), NULL);
+	Tcl_DStringFree(&buffer);
+    }
+    for (i=0 ; objdefCmds[i].name ; i++) {
+	TclDStringAppendLiteral(&buffer, "::oo::objdefine::");
+	Tcl_DStringAppend(&buffer, objdefCmds[i].name, -1);
+	Tcl_CreateObjCommand(interp, Tcl_DStringValue(&buffer),
+		objdefCmds[i].objProc, INT2PTR(objdefCmds[i].flag), NULL);
+	Tcl_DStringFree(&buffer);
+    }
+
+    Tcl_CallWhenDeleted(interp, KillFoundation, NULL);
+
+    /*
+     * Create the objects at the core of the object system. These need to be
+     * spliced manually.
+     */
+
+    fPtr->objectCls = AllocClass(interp,
+	    AllocObject(interp, "::oo::object", NULL));
+    fPtr->classCls = AllocClass(interp,
+	    AllocObject(interp, "::oo::class", NULL));
+    fPtr->objectCls->thisPtr->selfCls = fPtr->classCls;
+    fPtr->objectCls->thisPtr->flags |= ROOT_OBJECT;
+    fPtr->objectCls->flags |= ROOT_OBJECT;
+    fPtr->objectCls->superclasses.num = 0;
+    ckfree(fPtr->objectCls->superclasses.list);
+    fPtr->objectCls->superclasses.list = NULL;
+    fPtr->classCls->thisPtr->selfCls = fPtr->classCls;
+    fPtr->classCls->thisPtr->flags |= ROOT_CLASS;
+    fPtr->classCls->flags |= ROOT_CLASS;
+    TclOOAddToInstances(fPtr->objectCls->thisPtr, fPtr->classCls);
+    TclOOAddToInstances(fPtr->classCls->thisPtr, fPtr->classCls);
+    TclOOAddToSubclasses(fPtr->classCls, fPtr->objectCls);
+    AddRef(fPtr->objectCls->thisPtr);
+    AddRef(fPtr->objectCls);
+
+    /*
+     * Basic method declarations for the core classes.
+     */
+
+    for (i=0 ; objMethods[i].name ; i++) {
+	TclOONewBasicMethod(interp, fPtr->objectCls, &objMethods[i]);
+    }
+    for (i=0 ; clsMethods[i].name ; i++) {
+	TclOONewBasicMethod(interp, fPtr->classCls, &clsMethods[i]);
+    }
+
+    /*
+     * Create the default <cloned> method implementation, used when 'oo::copy'
+     * is called to finish the copying of one object to another.
+     */
+
+    TclNewLiteralStringObj(argsPtr, "originObject");
+    Tcl_IncrRefCount(argsPtr);
+    bodyPtr = Tcl_NewStringObj(clonedBody, -1);
+    TclOONewProcMethod(interp, fPtr->objectCls, 0, fPtr->clonedName, argsPtr,
+	    bodyPtr, NULL);
+    TclDecrRefCount(argsPtr);
+
+    /*
+     * Finish setting up the class of classes by marking the 'new' method as
+     * private; classes, unlike general objects, must have explicit names. We
+     * also need to create the constructor for classes.
+     */
+
+    TclNewLiteralStringObj(namePtr, "new");
+    Tcl_NewInstanceMethod(interp, (Tcl_Object) fPtr->classCls->thisPtr,
+	    namePtr /* keeps ref */, 0 /* ==private */, NULL, NULL);
+    fPtr->classCls->constructorPtr = (Method *) Tcl_NewMethod(interp,
+	    (Tcl_Class) fPtr->classCls, NULL, 0, &classConstructor, NULL);
+
+    /*
+     * Create non-object commands and plug ourselves into the Tcl [info]
+     * ensemble.
+     */
+
+    cmdPtr = (Command *) Tcl_NRCreateCommand(interp, "::oo::Helpers::next",
+	    NULL, TclOONextObjCmd, NULL, NULL);
+    cmdPtr->compileProc = TclCompileObjectNextCmd;
+    cmdPtr = (Command *) Tcl_NRCreateCommand(interp, "::oo::Helpers::nextto",
+	    NULL, TclOONextToObjCmd, NULL, NULL);
+    cmdPtr->compileProc = TclCompileObjectNextToCmd;
+    cmdPtr = (Command *) Tcl_CreateObjCommand(interp, "::oo::Helpers::self",
+	    TclOOSelfObjCmd, NULL, NULL);
+    cmdPtr->compileProc = TclCompileObjectSelfCmd;
+    Tcl_CreateObjCommand(interp, "::oo::define", TclOODefineObjCmd, NULL,
+	    NULL);
+    Tcl_CreateObjCommand(interp, "::oo::objdefine", TclOOObjDefObjCmd, NULL,
+	    NULL);
+    Tcl_CreateObjCommand(interp, "::oo::copy", TclOOCopyObjectCmd, NULL,NULL);
+    TclOOInitInfo(interp);
+
+    /*
+     * Now make the class of slots.
+     */
+
+    if (TclOODefineSlots(fPtr) != TCL_OK) {
+	return TCL_ERROR;
+    }
+    return Tcl_Eval(interp, slotScript);
+}
+
+/*
+ * ----------------------------------------------------------------------
+ *
+ * DeletedDefineNamespace, DeletedObjdefNamespace, DeletedHelpersNamespace --
+ *
+ *	Simple helpers used to clear fields of the foundation when they no
+ *	longer hold useful information.
+ *
+ * ----------------------------------------------------------------------
+ */
+
+static void
+DeletedDefineNamespace(
+    ClientData clientData)
+{
+    Foundation *fPtr = clientData;
+
+    fPtr->defineNs = NULL;
+}
+
+static void
+DeletedObjdefNamespace(
+    ClientData clientData)
+{
+    Foundation *fPtr = clientData;
+
+    fPtr->objdefNs = NULL;
+}
+
+static void
+DeletedHelpersNamespace(
+    ClientData clientData)
+{
+    Foundation *fPtr = clientData;
+
+    fPtr->helpersNs = NULL;
+}
+
+/*
+ * ----------------------------------------------------------------------
+ *
+ * KillFoundation --
+ *
+ *	Delete those parts of the OO core that are not deleted automatically
+ *	when the objects and classes themselves are destroyed.
+ *
+ * ----------------------------------------------------------------------
+ */
+
+static void
+KillFoundation(
+    ClientData clientData,	/* Pointer to the OO system foundation
+				 * structure. */
+    Tcl_Interp *interp)		/* The interpreter containing the OO system
+				 * foundation. */
+{
+    Foundation *fPtr = GetFoundation(interp);
+
+    DelRef(fPtr->objectCls->thisPtr);
+    DelRef(fPtr->objectCls);
+    TclDecrRefCount(fPtr->unknownMethodNameObj);
+    TclDecrRefCount(fPtr->constructorName);
+    TclDecrRefCount(fPtr->destructorName);
+    TclDecrRefCount(fPtr->clonedName);
+    TclDecrRefCount(fPtr->defineName);
+    ckfree(fPtr);
+}
+
+/*
+ * ----------------------------------------------------------------------
+ *
+ * AllocObject --
+ *
+ *	Allocate an object of basic type. Does not splice the object into its
+ *	class's instance list.  The caller must set the classPtr on the object,
+ *	either to a class or to NULL.
+ *
+ * ----------------------------------------------------------------------
+ */
+
+static Object *
+AllocObject(
+    Tcl_Interp *interp,		/* Interpreter within which to create the
+				 * object. */
+    const char *nameStr,	/* The name of the object to create, or NULL
+				 * if the OO system should pick the object
+				 * name itself (equal to the namespace
+				 * name). */
+    const char *nsNameStr)	/* The name of the namespace to create, or
+				 * NULL if the OO system should pick a unique
+				 * name itself. If this is non-NULL but names
+				 * a namespace that already exists, the effect
+				 * will be the same as if this was NULL. */
+{
+    Foundation *fPtr = GetFoundation(interp);
+    Object *oPtr;
+    Command *cmdPtr;
+    CommandTrace *tracePtr;
+    Namespace *nsPtr, *altNsPtr, *cxtNsPtr;
+    Tcl_Namespace *inNsPtr;
+    int creationEpoch, ignored;
+    const char *simpleName;
+
+    oPtr = ckalloc(sizeof(Object));
+    memset(oPtr, 0, sizeof(Object));
+
+    /*
+     * Every object has a namespace; make one. Note that this also normally
+     * computes the creation epoch value for the object, a sequence number
+     * that is unique to the object (and which allows us to manage method
+     * caching without comparing pointers).
+     *
+     * When creating a namespace, we first check to see if the caller
+     * specified the name for the namespace. If not, we generate namespace
+     * names using the epoch until such time as a new namespace is actually
+     * created.
+     */
+
+    if (nsNameStr != NULL) {
+	oPtr->namespacePtr = Tcl_CreateNamespace(interp, nsNameStr, oPtr,
+		ObjectNamespaceDeleted);
+	if (oPtr->namespacePtr != NULL) {
+	    creationEpoch = ++fPtr->tsdPtr->nsCount;
+	    goto configNamespace;
+	}
+	Tcl_ResetResult(interp);
+    }
+
+    while (1) {
+	char objName[10 + TCL_INTEGER_SPACE];
+
+	sprintf(objName, "::oo::Obj%d", ++fPtr->tsdPtr->nsCount);
+	oPtr->namespacePtr = Tcl_CreateNamespace(interp, objName, oPtr,
+		ObjectNamespaceDeleted);
+	if (oPtr->namespacePtr != NULL) {
+	    creationEpoch = fPtr->tsdPtr->nsCount;
+	    break;
+	}
+
+	/*
+	 * Could not make that namespace, so we make another. But first we
+	 * have to get rid of the error message from Tcl_CreateNamespace,
+	 * since that's something that should not be exposed to the user.
+	 */
+
+	Tcl_ResetResult(interp);
+    }
+
+    /*
+     * Make the namespace know about the helper commands. This grants access
+     * to the [self] and [next] commands.
+     */
+
+  configNamespace:
+    if (fPtr->helpersNs != NULL) {
+	TclSetNsPath((Namespace *) oPtr->namespacePtr, 1, &fPtr->helpersNs);
+    }
+    TclOOSetupVariableResolver(oPtr->namespacePtr);
+
+    /*
+     * Suppress use of compiled versions of the commands in this object's
+     * namespace and its children; causes wrong behaviour without expensive
+     * recompilation. [Bug 2037727]
+     */
+
+    ((Namespace *) oPtr->namespacePtr)->flags |= NS_SUPPRESS_COMPILATION;
+
+    /*
+     * Set up a callback to get notification of the deletion of a namespace
+     * when enough of the namespace still remains to execute commands and
+     * access variables in it. [Bug 2950259]
+     */
+
+    ((Namespace *) oPtr->namespacePtr)->earlyDeleteProc = SquelchedNsFirst;
+
+    /*
+     * Fill in the rest of the non-zero/NULL parts of the structure.
+     */
+
+    oPtr->fPtr = fPtr;
+    oPtr->selfCls = fPtr->objectCls;
+    oPtr->creationEpoch = creationEpoch;
+    oPtr->refCount = 1;
+    oPtr->flags = USE_CLASS_CACHE;
+
+    /*
+     * Finally, create the object commands and initialize the trace on the
+     * public command (so that the object structures are deleted when the
+     * command is deleted).
+     */
+
+    if (nameStr) {
+	inNsPtr = TclGetCurrentNamespace(interp);
+    } else {
+	nameStr = oPtr->namespacePtr->name;
+	inNsPtr = oPtr->namespacePtr;
+    }
+    
+    TclGetNamespaceForQualName(interp, nameStr, (Namespace *) inNsPtr, 0,
+	    &nsPtr, &altNsPtr, &cxtNsPtr, &simpleName);
+
+    oPtr->command = TclCreateObjCommandInNs(interp, simpleName,
+	(Tcl_Namespace *)nsPtr, PublicObjectCmd, oPtr, NULL);
+
+    /*
+     * Add the NRE command and trace directly. While this breaks a number of
+     * abstractions, it is faster and we're inside Tcl here so we're allowed.
+     */
+
+    cmdPtr = (Command *) oPtr->command;
+    cmdPtr->nreProc = PublicNRObjectCmd;
+    cmdPtr->tracePtr = tracePtr = ckalloc(sizeof(CommandTrace));
+    tracePtr->traceProc = ObjectRenamedTrace;
+    tracePtr->clientData = oPtr;
+    tracePtr->flags = TCL_TRACE_RENAME|TCL_TRACE_DELETE;
+    tracePtr->nextPtr = NULL;
+    tracePtr->refCount = 1;
+
+    /*
+     * Access the namespace command table directly when creating "my" to avoid
+     * a bottleneck in string manipulation. Another abstraction-buster.
+     */
+
+    cmdPtr = ckalloc(sizeof(Command));
+    memset(cmdPtr, 0, sizeof(Command));
+    cmdPtr->nsPtr = (Namespace *) oPtr->namespacePtr;
+    cmdPtr->hPtr = Tcl_CreateHashEntry(&cmdPtr->nsPtr->cmdTable, "my",
+	    &ignored);
+    cmdPtr->refCount = 1;
+    cmdPtr->objProc = PrivateObjectCmd;
+    cmdPtr->deleteProc = MyDeleted;
+    cmdPtr->objClientData = cmdPtr->deleteData = oPtr;
+    cmdPtr->proc = TclInvokeObjectCommand;
+    cmdPtr->clientData = cmdPtr;
+    cmdPtr->nreProc = PrivateNRObjectCmd;
+    Tcl_SetHashValue(cmdPtr->hPtr, cmdPtr);
+    oPtr->myCommand = (Tcl_Command) cmdPtr;
+
+    return oPtr;
+}
+
+/*
+ * ----------------------------------------------------------------------
+ *
+ * SquelchCachedName --
+ *
+ *	Encapsulates how to throw away a cached object name. Called from
+ *	object rename traces and at object destruction.
+ *
+ * ----------------------------------------------------------------------
+ */
+
+static inline void
+SquelchCachedName(
+    Object *oPtr)
+{
+    if (oPtr->cachedNameObj) {
+	Tcl_DecrRefCount(oPtr->cachedNameObj);
+	oPtr->cachedNameObj = NULL;
+    }
+}
+
+/*
+ * ----------------------------------------------------------------------
+ *
+ * MyDeleted --
+ *
+ *	This callback is triggered when the object's [my] command is deleted
+ *	by any mechanism. It just marks the object as not having a [my]
+ *	command, and so prevents cleanup of that when the object itself is
+ *	deleted.
+ *
+ * ----------------------------------------------------------------------
+ */
+
+static void
+MyDeleted(
+    ClientData clientData)	/* Reference to the object whose [my] has been
+				 * squelched. */
+{
+    register Object *oPtr = clientData;
+
+    oPtr->myCommand = NULL;
+}
+
+/*
+ * ----------------------------------------------------------------------
+ *
+ * SquelchedNsFirst --
+ *
+ *	This callback is triggered when the object's namespace is deleted by
+ *	any mechanism. It deletes the object's public command if it has not
+ *	already been deleted, so ensuring that destructors get run at an
+ *	appropriate time. [Bug 2950259]
+ *
+ * ----------------------------------------------------------------------
+ */
+
+static void
+SquelchedNsFirst(
+    ClientData clientData)
+{
+    Object *oPtr = clientData;
+
+    if (oPtr->command) {
+	Tcl_DeleteCommandFromToken(oPtr->fPtr->interp, oPtr->command);
+    }
+}
+
+/*
+ * ----------------------------------------------------------------------
+ *
+ * ObjectRenamedTrace --
+ *
+ *	This callback is triggered when the object is deleted by any
+ *	mechanism. It runs the destructors and arranges for the actual cleanup
+ *	of the object's namespace, which in turn triggers cleansing of the
+ *	object data structures.
+ *
+ * ----------------------------------------------------------------------
+ */
+
+static void
+ObjectRenamedTrace(
+    ClientData clientData,	/* The object being deleted. */
+    Tcl_Interp *interp,		/* The interpreter containing the object. */
+    const char *oldName,	/* What the object was (last) called. */
+    const char *newName,	/* What it's getting renamed to. (unused) */
+    int flags)			/* Why was the object deleted? */
+{
+    Object *oPtr = clientData;
+    Foundation *fPtr = oPtr->fPtr;
+
+    /*
+     * If this is a rename and not a delete of the object, we just flush the
+     * cache of the object name.
+     */
+
+    if (flags & TCL_TRACE_RENAME) {
+	SquelchCachedName(oPtr);
+	return;
+    }
+
+    /*
+     * Oh dear, the object really is being deleted. Handle this by running the
+     * destructors and deleting the object's namespace, which in turn causes
+     * the real object structures to be deleted.
+     *
+     * Note that it is possible for the namespace to be deleted before the
+     * command. Because of that case, we must take care here to mark the
+     * command as being deleted so that if we return here we don't run into
+     * reentrancy problems.
+     *
+     * We also do not run destructors on the core class objects when the
+     * interpreter is being deleted; their incestuous nature causes problems
+     * in that case when the destructor is partially deleted before the uses
+     * of it have gone. [Bug 2949397]
+     */
+
+    AddRef(oPtr);
+    AddRef(fPtr->classCls);
+    AddRef(fPtr->objectCls);
+    AddRef(fPtr->classCls->thisPtr);
+    AddRef(fPtr->objectCls->thisPtr);
+    oPtr->command = NULL;
+
+    if (!(oPtr->flags & DESTRUCTOR_CALLED) && !Tcl_InterpDeleted(interp)) {
+	CallContext *contextPtr =
+		TclOOGetCallContext(oPtr, NULL, DESTRUCTOR, NULL);
+	int result;
+	Tcl_InterpState state;
+
+	oPtr->flags |= DESTRUCTOR_CALLED;
+	if (contextPtr != NULL) {
+	    contextPtr->callPtr->flags |= DESTRUCTOR;
+	    contextPtr->skip = 0;
+	    state = Tcl_SaveInterpState(interp, TCL_OK);
+	    result = Tcl_NRCallObjProc(interp, TclOOInvokeContext,
+		    contextPtr, 0, NULL);
+	    if (result != TCL_OK) {
+		Tcl_BackgroundException(interp, result);
+	    }
+	    Tcl_RestoreInterpState(interp, state);
+	    TclOODeleteContext(contextPtr);
+	}
+    }
+
+    /*
+     * OK, the destructor's been run. Time to splat the class data (if any)
+     * and nuke the namespace (which triggers the final crushing of the object
+     * structure itself).
+     *
+     * The class of objects needs some special care; if it is deleted (and
+     * we're not killing the whole interpreter) we force the delete of the
+     * class of classes now as well. Due to the incestuous nature of those two
+     * classes, if one goes the other must too and yet the tangle can
+     * sometimes not go away automatically; we force it here. [Bug 2962664]
+     */
+
+    if (!Tcl_InterpDeleted(interp) && IsRootObject(oPtr)
+	    && !Deleted(fPtr->classCls->thisPtr)) {
+	Tcl_DeleteCommandFromToken(interp, fPtr->classCls->thisPtr->command);
+    }
+
+    if (oPtr->classPtr != NULL) {
+	AddRef(oPtr->classPtr);
+	ReleaseClassContents(interp, oPtr);
+    }
+
+    /*
+     * The namespace is only deleted if it hasn't already been deleted. [Bug
+     * 2950259]
+     */
+
+    if (oPtr->namespacePtr && ((Namespace *) oPtr->namespacePtr)->earlyDeleteProc != NULL) {
+	Tcl_DeleteNamespace(oPtr->namespacePtr);
+    }
+    if (oPtr->classPtr) {
+	DelRef(oPtr->classPtr);
+    }
+    DelRef(fPtr->classCls->thisPtr);
+    DelRef(fPtr->objectCls->thisPtr);
+    DelRef(fPtr->classCls);
+    DelRef(fPtr->objectCls);
+    DelRef(oPtr);
+}
+
+/*
+ * ----------------------------------------------------------------------
+ *
+ * ClearMixins, ClearSuperclasses --
+ *
+ *	Utility functions for correctly clearing the list of mixins or
+ *	superclasses of a class. Will ckfree() the list storage.
+ *
+ * ----------------------------------------------------------------------
+ */
+
+static void
+ClearMixins(
+    Class *clsPtr)
+{
+    int i;
+    Class *mixinPtr;
+
+    if (clsPtr->mixins.num == 0) {
+	return;
+    }
+
+    FOREACH(mixinPtr, clsPtr->mixins) {
+	TclOORemoveFromMixinSubs(clsPtr, mixinPtr);
+    }
+    ckfree(clsPtr->mixins.list);
+    clsPtr->mixins.list = NULL;
+    clsPtr->mixins.num = 0;
+}
+
+static void
+ClearSuperclasses(
+    Class *clsPtr)
+{
+    int i;
+    Class *superPtr;
+
+    if (clsPtr->superclasses.num == 0) {
+	return;
+    }
+
+    FOREACH(superPtr, clsPtr->superclasses) {
+	TclOORemoveFromSubclasses(clsPtr, superPtr);
+    }
+    ckfree(clsPtr->superclasses.list);
+    clsPtr->superclasses.list = NULL;
+    clsPtr->superclasses.num = 0;
+}
+
+/*
+ * ----------------------------------------------------------------------
+ *
+ * ReleaseClassContents --
+ *
+ *	Tear down the special class data structure, including deleting all
+ *	dependent classes and objects.
+ *
+ * ----------------------------------------------------------------------
+ */
+
+static void
+ReleaseClassContents(
+    Tcl_Interp *interp,		/* The interpreter containing the class. */
+    Object *oPtr)		/* The object representing the class. */
+{
+    FOREACH_HASH_DECLS;
+    int i;
+    Class *clsPtr = oPtr->classPtr, *mixinSubclassPtr, *subclassPtr;
+    Object *instancePtr;
+    Foundation *fPtr = oPtr->fPtr;
+
+    /*
+     * Sanity check!
+     */
+
+    if (!Deleted(oPtr)) {
+	if (IsRootClass(oPtr)) {
+	    Tcl_Panic("deleting class structure for non-deleted %s",
+		    "::oo::class");
+	} else if (IsRootObject(oPtr)) {
+	    Tcl_Panic("deleting class structure for non-deleted %s",
+		    "::oo::object");
+	} else {
+	    Tcl_Panic("deleting class structure for non-deleted %s",
+		    "general object");
+	}
+    }
+
+    /*
+     * Lock a number of dependent objects until we've stopped putting our
+     * fingers in them.
+     */
+
+    FOREACH(mixinSubclassPtr, clsPtr->mixinSubs) {
+	if (mixinSubclassPtr != NULL) {
+	    AddRef(mixinSubclassPtr);
+	    AddRef(mixinSubclassPtr->thisPtr);
+	}
+    }
+    FOREACH(subclassPtr, clsPtr->subclasses) {
+	if (subclassPtr != NULL && !IsRoot(subclassPtr)) {
+	    AddRef(subclassPtr);
+	    AddRef(subclassPtr->thisPtr);
+	}
+    }
+    if (!IsRootClass(oPtr)) {
+	FOREACH(instancePtr, clsPtr->instances) {
+	    int j;
+	    if (instancePtr->selfCls == clsPtr) {
+		instancePtr->flags |= CLASS_GONE;
+	    }
+	    for(j=0 ; j<instancePtr->mixins.num ; j++) {
+		Class *mixin = instancePtr->mixins.list[j];
+		Class *nextMixin = NULL;
+		if (mixin == clsPtr) {
+		    if (j < instancePtr->mixins.num - 1) {
+			nextMixin = instancePtr->mixins.list[j+1];
+		    }
+		    if (j == 0) {
+			instancePtr->mixins.num = 0;
+			instancePtr->mixins.list = NULL;
+		    } else {
+			instancePtr->mixins.list[j-1] = nextMixin;
+		    }
+		    instancePtr->mixins.num -= 1;
+		}
+	    }
+	    if (instancePtr != NULL && !IsRoot(instancePtr)) {
+		AddRef(instancePtr);
+	    }
+	}
+    }
+
+    /*
+     * Squelch classes that this class has been mixed into.
+     */
+
+    FOREACH(mixinSubclassPtr, clsPtr->mixinSubs) {
+	if (!Deleted(mixinSubclassPtr->thisPtr)) {
+	    Tcl_DeleteCommandFromToken(interp,
+		    mixinSubclassPtr->thisPtr->command);
+	}
+	ClearMixins(mixinSubclassPtr);
+	DelRef(mixinSubclassPtr->thisPtr);
+	DelRef(mixinSubclassPtr);
+    }
+    if (clsPtr->mixinSubs.list != NULL) {
+	ckfree(clsPtr->mixinSubs.list);
+	clsPtr->mixinSubs.list = NULL;
+	clsPtr->mixinSubs.num = 0;
+    }
+
+    /*
+     * Squelch subclasses of this class.
+     */
+
+    FOREACH(subclassPtr, clsPtr->subclasses) {
+	if (IsRoot(subclassPtr)) {
+	    continue;
+	}
+	if (!Deleted(subclassPtr->thisPtr)) {
+	    Tcl_DeleteCommandFromToken(interp, subclassPtr->thisPtr->command);
+	}
+	ClearSuperclasses(subclassPtr);
+	DelRef(subclassPtr->thisPtr);
+	DelRef(subclassPtr);
+    }
+    if (clsPtr->subclasses.list != NULL) {
+	ckfree(clsPtr->subclasses.list);
+	clsPtr->subclasses.list = NULL;
+	clsPtr->subclasses.num = 0;
+    }
+
+    /*
+     * Squelch instances of this class (includes objects we're mixed into).
+     */
+
+    if (!IsRootClass(oPtr)) {
+	FOREACH(instancePtr, clsPtr->instances) {
+	    if (instancePtr == NULL || IsRoot(instancePtr)) {
+		continue;
+	    }
+	    if (!Deleted(instancePtr)) {
+		Tcl_DeleteCommandFromToken(interp, instancePtr->command);
+		/*
+		 * Tcl_DeleteCommandFromToken() may have done to whole
+		 * job for us.  Roll back and check again.
+		 */
+		i--;
+		continue;
+	    }
+	    DelRef(instancePtr);
+	}
+    }
+    if (clsPtr->instances.list != NULL) {
+	ckfree(clsPtr->instances.list);
+	clsPtr->instances.list = NULL;
+	clsPtr->instances.num = 0;
+    }
+
+    /*
+     * Special: We delete these after everything else.
+     */
+
+    if (IsRootClass(oPtr) && !Deleted(fPtr->objectCls->thisPtr)) {
+	Tcl_DeleteCommandFromToken(interp, fPtr->objectCls->thisPtr->command);
+    }
+
+    /*
+     * Squelch method implementation chain caches.
+     */
+
+    if (clsPtr->constructorChainPtr) {
+	TclOODeleteChain(clsPtr->constructorChainPtr);
+	clsPtr->constructorChainPtr = NULL;
+    }
+    if (clsPtr->destructorChainPtr) {
+	TclOODeleteChain(clsPtr->destructorChainPtr);
+	clsPtr->destructorChainPtr = NULL;
+    }
+    if (clsPtr->classChainCache) {
+	CallChain *callPtr;
+
+	FOREACH_HASH_VALUE(callPtr, clsPtr->classChainCache) {
+	    TclOODeleteChain(callPtr);
+	}
+	Tcl_DeleteHashTable(clsPtr->classChainCache);
+	ckfree(clsPtr->classChainCache);
+	clsPtr->classChainCache = NULL;
+    }
+
+    /*
+     * Squelch our filter list.
+     */
+
+    if (clsPtr->filters.num) {
+	Tcl_Obj *filterObj;
+
+	FOREACH(filterObj, clsPtr->filters) {
+	    TclDecrRefCount(filterObj);
+	}
+	ckfree(clsPtr->filters.list);
+	clsPtr->filters.num = 0;
+    }
+
+    /*
+     * Squelch our metadata.
+     */
+
+    if (clsPtr->metadataPtr != NULL) {
+	Tcl_ObjectMetadataType *metadataTypePtr;
+	ClientData value;
+
+	FOREACH_HASH(metadataTypePtr, value, clsPtr->metadataPtr) {
+	    metadataTypePtr->deleteProc(value);
+	}
+	Tcl_DeleteHashTable(clsPtr->metadataPtr);
+	ckfree(clsPtr->metadataPtr);
+	clsPtr->metadataPtr = NULL;
+    }
+}
+
+/*
+ * ----------------------------------------------------------------------
+ *
+ * ObjectNamespaceDeleted --
+ *
+ *	Callback when the object's namespace is deleted. Used to clean up the
+ *	data structures associated with the object. The complicated bit is
+ *	that this can sometimes happen before the object's command is deleted
+ *	(interpreter teardown is complex!)
+ *
+ * ----------------------------------------------------------------------
+ */
+
+static void
+ObjectNamespaceDeleted(
+    ClientData clientData)	/* Pointer to the class whose namespace is
+				 * being deleted. */
+{
+    Object *oPtr = clientData;
+    FOREACH_HASH_DECLS;
+    Class *clsPtr = oPtr->classPtr, *mixinPtr;
+    Method *mPtr;
+    Tcl_Obj *filterObj, *variableObj;
+    int deleteAlreadyInProgress = 0, i;
+
+    /*
+     * Instruct everyone to no longer use any allocated fields of the object.
+     * Also delete the commands that refer to the object at this point (if
+     * they still exist) because otherwise their references to the object
+     * point into freed memory, allowing crashes.
+     */
+
+    if (oPtr->command) {
+	if ((((Command *)oPtr->command)->flags && CMD_IS_DELETED)) {
+	    /*
+	     * Namespace deletion must have been triggered by a trace on command
+	     * deletion , meaning that ObjectRenamedTrace() is eventually going
+	     * to be called .
+	     */
+	    deleteAlreadyInProgress = 1;
+	}
+
+	Tcl_DeleteCommandFromToken(oPtr->fPtr->interp, oPtr->command);
+    }
+    if (oPtr->myCommand) {
+	Tcl_DeleteCommandFromToken(oPtr->fPtr->interp, oPtr->myCommand);
+    }
+
+    /*
+     * Splice the object out of its context. After this, we must *not* call
+     * methods on the object.
+     */
+
+    if (!IsRootObject(oPtr) && !(oPtr->flags & CLASS_GONE)) {
+	TclOORemoveFromInstances(oPtr, oPtr->selfCls);
+    }
+
+    FOREACH(mixinPtr, oPtr->mixins) {
+	if (mixinPtr) {
+	    TclOORemoveFromInstances(oPtr, mixinPtr);
+	}
+    }
+    if (i) {
+	ckfree(oPtr->mixins.list);
+    }
+
+    FOREACH(filterObj, oPtr->filters) {
+	TclDecrRefCount(filterObj);
+    }
+    if (i) {
+	ckfree(oPtr->filters.list);
+    }
+
+    if (oPtr->methodsPtr) {
+	FOREACH_HASH_VALUE(mPtr, oPtr->methodsPtr) {
+	    TclOODelMethodRef(mPtr);
+	}
+	Tcl_DeleteHashTable(oPtr->methodsPtr);
+	ckfree(oPtr->methodsPtr);
+    }
+
+    FOREACH(variableObj, oPtr->variables) {
+	TclDecrRefCount(variableObj);
+    }
+    if (i) {
+	ckfree(oPtr->variables.list);
+    }
+
+    if (oPtr->chainCache) {
+	TclOODeleteChainCache(oPtr->chainCache);
+    }
+
+    SquelchCachedName(oPtr);
+
+    if (oPtr->metadataPtr != NULL) {
+	Tcl_ObjectMetadataType *metadataTypePtr;
+	ClientData value;
+
+	FOREACH_HASH(metadataTypePtr, value, oPtr->metadataPtr) {
+	    metadataTypePtr->deleteProc(value);
+	}
+	Tcl_DeleteHashTable(oPtr->metadataPtr);
+	ckfree(oPtr->metadataPtr);
+	oPtr->metadataPtr = NULL;
+    }
+
+    /*
+     * If this was a class, there's additional deletion work to do.
+     */
+
+    if (clsPtr != NULL) {
+	Tcl_ObjectMetadataType *metadataTypePtr;
+	ClientData value;
+
+	if (clsPtr->metadataPtr != NULL) {
+	    FOREACH_HASH(metadataTypePtr, value, clsPtr->metadataPtr) {
+		metadataTypePtr->deleteProc(value);
+	    }
+	    Tcl_DeleteHashTable(clsPtr->metadataPtr);
+	    ckfree(clsPtr->metadataPtr);
+	    clsPtr->metadataPtr = NULL;
+	}
+
+	FOREACH(filterObj, clsPtr->filters) {
+	    TclDecrRefCount(filterObj);
+	}
+	if (i) {
+	    ckfree(clsPtr->filters.list);
+	    clsPtr->filters.num = 0;
+	}
+
+	ClearMixins(clsPtr);
+
+	ClearSuperclasses(clsPtr);
+
+	if (clsPtr->subclasses.list) {
+	    ckfree(clsPtr->subclasses.list);
+	    clsPtr->subclasses.list = NULL;
+	    clsPtr->subclasses.num = 0;
+	}
+	if (clsPtr->instances.list) {
+	    ckfree(clsPtr->instances.list);
+	    clsPtr->instances.list = NULL;
+	    clsPtr->instances.num = 0;
+	}
+	if (clsPtr->mixinSubs.list) {
+	    ckfree(clsPtr->mixinSubs.list);
+	    clsPtr->mixinSubs.list = NULL;
+	    clsPtr->mixinSubs.num = 0;
+	}
+
+	FOREACH_HASH_VALUE(mPtr, &clsPtr->classMethods) {
+	    TclOODelMethodRef(mPtr);
+	}
+	Tcl_DeleteHashTable(&clsPtr->classMethods);
+	TclOODelMethodRef(clsPtr->constructorPtr);
+	TclOODelMethodRef(clsPtr->destructorPtr);
+
+	FOREACH(variableObj, clsPtr->variables) {
+	    TclDecrRefCount(variableObj);
+	}
+	if (i) {
+	    ckfree(clsPtr->variables.list);
+	}
+
+	DelRef(clsPtr);
+    }
+
+    /*
+     * Delete the object structure itself.
+     */
+
+    if (deleteAlreadyInProgress) {
+	oPtr->classPtr = NULL;
+	oPtr->namespacePtr = NULL;
+    } else {
+	DelRef(oPtr);
+    }
+
+}
+
+/*
+ * ----------------------------------------------------------------------
+ *
+ * TclOORemoveFromInstances --
+ *
+ *	Utility function to remove an object from the list of instances within
+ *	a class.
+ *
+ * ----------------------------------------------------------------------
+ */
+
+void
+TclOORemoveFromInstances(
+    Object *oPtr,		/* The instance to remove. */
+    Class *clsPtr)		/* The class (possibly) containing the
+				 * reference to the instance. */
+{
+    int i;
+    Object *instPtr;
+
+    FOREACH(instPtr, clsPtr->instances) {
+	if (oPtr == instPtr) {
+	    goto removeInstance;
+	}
+    }
+    return;
+
+  removeInstance:
+    if (Deleted(clsPtr->thisPtr)) {
+	if (!IsRootClass(clsPtr)) {
+	    DelRef(clsPtr->instances.list[i]);
+	}
+	clsPtr->instances.list[i] = NULL;
+    } else {
+	clsPtr->instances.num--;
+	if (i < clsPtr->instances.num) {
+	    clsPtr->instances.list[i] =
+		    clsPtr->instances.list[clsPtr->instances.num];
+	}
+	clsPtr->instances.list[clsPtr->instances.num] = NULL;
+    }
+}
+
+/*
+ * ----------------------------------------------------------------------
+ *
+ * TclOOAddToInstances --
+ *
+ *	Utility function to add an object to the list of instances within a
+ *	class.
+ *
+ * ----------------------------------------------------------------------
+ */
+
+void
+TclOOAddToInstances(
+    Object *oPtr,		/* The instance to add. */
+    Class *clsPtr)		/* The class to add the instance to. It is
+				 * assumed that the class is not already
+				 * present as an instance in the class. */
+{
+    if (Deleted(clsPtr->thisPtr)) {
+	return;
+    }
+    if (clsPtr->instances.num >= clsPtr->instances.size) {
+	clsPtr->instances.size += ALLOC_CHUNK;
+	if (clsPtr->instances.size == ALLOC_CHUNK) {
+	    clsPtr->instances.list = ckalloc(sizeof(Object *) * ALLOC_CHUNK);
+	} else {
+	    clsPtr->instances.list = ckrealloc(clsPtr->instances.list,
+		    sizeof(Object *) * clsPtr->instances.size);
+	}
+    }
+    clsPtr->instances.list[clsPtr->instances.num++] = oPtr;
+}
+
+/*
+ * ----------------------------------------------------------------------
+ *
+ * TclOORemoveFromSubclasses --
+ *
+ *	Utility function to remove a class from the list of subclasses within
+ *	another class.
+ *
+ * ----------------------------------------------------------------------
+ */
+
+void
+TclOORemoveFromSubclasses(
+    Class *subPtr,		/* The subclass to remove. */
+    Class *superPtr)		/* The superclass to (possibly) remove the
+				 * subclass reference from. */
+{
+    int i;
+    Class *subclsPtr;
+
+    FOREACH(subclsPtr, superPtr->subclasses) {
+	if (subPtr == subclsPtr) {
+	    goto removeSubclass;
+	}
+    }
+    return;
+
+  removeSubclass:
+    if (!Deleted(superPtr->thisPtr)) {
+	superPtr->subclasses.num--;
+	if (i < superPtr->subclasses.num) {
+	    superPtr->subclasses.list[i] =
+		    superPtr->subclasses.list[superPtr->subclasses.num];
+	}
+	superPtr->subclasses.list[superPtr->subclasses.num] = NULL;
+    }
+}
+
+/*
+ * ----------------------------------------------------------------------
+ *
+ * TclOOAddToSubclasses --
+ *
+ *	Utility function to add a class to the list of subclasses within
+ *	another class.
+ *
+ * ----------------------------------------------------------------------
+ */
+
+void
+TclOOAddToSubclasses(
+    Class *subPtr,		/* The subclass to add. */
+    Class *superPtr)		/* The superclass to add the subclass to. It
+				 * is assumed that the class is not already
+				 * present as a subclass in the superclass. */
+{
+    if (Deleted(superPtr->thisPtr)) {
+	return;
+    }
+    if (superPtr->subclasses.num >= superPtr->subclasses.size) {
+	superPtr->subclasses.size += ALLOC_CHUNK;
+	if (superPtr->subclasses.size == ALLOC_CHUNK) {
+	    superPtr->subclasses.list = ckalloc(sizeof(Class*) * ALLOC_CHUNK);
+	} else {
+	    superPtr->subclasses.list = ckrealloc(superPtr->subclasses.list,
+		    sizeof(Class *) * superPtr->subclasses.size);
+	}
+    }
+    superPtr->subclasses.list[superPtr->subclasses.num++] = subPtr;
+}
+
+/*
+ * ----------------------------------------------------------------------
+ *
+ * TclOORemoveFromMixinSubs --
+ *
+ *	Utility function to remove a class from the list of mixinSubs within
+ *	another class.
+ *
+ * ----------------------------------------------------------------------
+ */
+
+void
+TclOORemoveFromMixinSubs(
+    Class *subPtr,		/* The subclass to remove. */
+    Class *superPtr)		/* The superclass to (possibly) remove the
+				 * subclass reference from. */
+{
+    int i;
+    Class *subclsPtr;
+
+    FOREACH(subclsPtr, superPtr->mixinSubs) {
+	if (subPtr == subclsPtr) {
+	    goto removeSubclass;
+	}
+    }
+    return;
+
+  removeSubclass:
+    if (!Deleted(superPtr->thisPtr)) {
+	superPtr->mixinSubs.num--;
+	if (i < superPtr->mixinSubs.num) {
+	    superPtr->mixinSubs.list[i] =
+		    superPtr->mixinSubs.list[superPtr->mixinSubs.num];
+	}
+	superPtr->mixinSubs.list[superPtr->mixinSubs.num] = NULL;
+    }
+}
+
+/*
+ * ----------------------------------------------------------------------
+ *
+ * TclOOAddToMixinSubs --
+ *
+ *	Utility function to add a class to the list of mixinSubs within
+ *	another class.
+ *
+ * ----------------------------------------------------------------------
+ */
+
+void
+TclOOAddToMixinSubs(
+    Class *subPtr,		/* The subclass to add. */
+    Class *superPtr)		/* The superclass to add the subclass to. It
+				 * is assumed that the class is not already
+				 * present as a subclass in the superclass. */
+{
+    if (Deleted(superPtr->thisPtr)) {
+	return;
+    }
+    if (superPtr->mixinSubs.num >= superPtr->mixinSubs.size) {
+	superPtr->mixinSubs.size += ALLOC_CHUNK;
+	if (superPtr->mixinSubs.size == ALLOC_CHUNK) {
+	    superPtr->mixinSubs.list = ckalloc(sizeof(Class *) * ALLOC_CHUNK);
+	} else {
+	    superPtr->mixinSubs.list = ckrealloc(superPtr->mixinSubs.list,
+		    sizeof(Class *) * superPtr->mixinSubs.size);
+	}
+    }
+    superPtr->mixinSubs.list[superPtr->mixinSubs.num++] = subPtr;
+}
+
+/*
+ * ----------------------------------------------------------------------
+ *
+ * AllocClass --
+ *
+ *	Allocate a basic class. Does not splice the class object into its
+ *	class's instance list.
+ *
+ * ----------------------------------------------------------------------
+ */
+
+static Class *
+AllocClass(
+    Tcl_Interp *interp,		/* Interpreter within which to allocate the
+				 * class. */
+    Object *useThisObj)		/* Object that is to act as the class
+				 * representation, or NULL if a new object
+				 * (with automatic name) is to be used. */
+{
+    Foundation *fPtr = GetFoundation(interp);
+    Class *clsPtr = ckalloc(sizeof(Class));
+
+    /*
+     * Make an object if we haven't been given one.
+     */
+
+    memset(clsPtr, 0, sizeof(Class));
+    if (useThisObj == NULL) {
+	clsPtr->thisPtr = AllocObject(interp, NULL, NULL);
+    } else {
+	clsPtr->thisPtr = useThisObj;
+    }
+
+    /*
+     * Configure the namespace path for the class's object.
+     */
+
+    if (fPtr->helpersNs != NULL) {
+	Tcl_Namespace *path[2];
+
+	path[0] = fPtr->helpersNs;
+	path[1] = fPtr->ooNs;
+	TclSetNsPath((Namespace *) clsPtr->thisPtr->namespacePtr, 2, path);
+    } else {
+	TclSetNsPath((Namespace *) clsPtr->thisPtr->namespacePtr, 1,
+		&fPtr->ooNs);
+    }
+
+    /*
+     * Class objects inherit from the class of classes unless they inherit
+     * from some subclass of it. Enforce this right now.
+     */
+
+    clsPtr->thisPtr->selfCls = fPtr->classCls;
+
+    /*
+     * Classes are subclasses of oo::object, i.e. the objects they create are
+     * objects.
+     */
+
+    clsPtr->superclasses.num = 1;
+    clsPtr->superclasses.list = ckalloc(sizeof(Class *));
+    clsPtr->superclasses.list[0] = fPtr->objectCls;
+
+    /*
+     * Finish connecting the class structure to the object structure.
+     */
+
+    clsPtr->thisPtr->classPtr = clsPtr;
+
+    /*
+     * That's the complicated bit. Now fill in the rest of the non-zero/NULL
+     * fields.
+     */
+
+    clsPtr->refCount = 1;
+    Tcl_InitObjHashTable(&clsPtr->classMethods);
+    return clsPtr;
+}
+
+/*
+ * ----------------------------------------------------------------------
+ *
+ * Tcl_NewObjectInstance --
+ *
+ *	Allocate a new instance of an object.
+ *
+ * ----------------------------------------------------------------------
+ */
+
+Tcl_Object
+Tcl_NewObjectInstance(
+    Tcl_Interp *interp,		/* Interpreter context. */
+    Tcl_Class cls,		/* Class to create an instance of. */
+    const char *nameStr,	/* Name of object to create, or NULL to ask
+				 * the code to pick its own unique name. */
+    const char *nsNameStr,	/* Name of namespace to create inside object,
+				 * or NULL to ask the code to pick its own
+				 * unique name. */
+    int objc,			/* Number of arguments. Negative value means
+				 * do not call constructor. */
+    Tcl_Obj *const *objv,	/* Argument list. */
+    int skip)			/* Number of arguments to _not_ pass to the
+				 * constructor. */
+{
+    register Class *classPtr = (Class *) cls;
+    Foundation *fPtr = GetFoundation(interp);
+    Object *oPtr;
+
+    /*
+     * Check if we're going to create an object over an existing command;
+     * that's not allowed.
+     */
+
+    if (nameStr && Tcl_FindCommand(interp, nameStr, NULL,
+	    TCL_NAMESPACE_ONLY)) {
+	Tcl_SetObjResult(interp, Tcl_ObjPrintf(
+		"can't create object \"%s\": command already exists with"
+		" that name", nameStr));
+	Tcl_SetErrorCode(interp, "TCL", "OO", "OVERWRITE_OBJECT", NULL);
+	return NULL;
+    }
+
+    /*
+     * Create the object.
+     */
+
+    oPtr = AllocObject(interp, nameStr, nsNameStr);
+    oPtr->selfCls = classPtr;
+    TclOOAddToInstances(oPtr, classPtr);
+
+    /*
+     * Check to see if we're really creating a class. If so, allocate the
+     * class structure as well.
+     */
+
+    if (TclOOIsReachable(fPtr->classCls, classPtr)) {
+	/*
+	 * Is a class, so attach a class structure. Note that the AllocClass
+	 * function splices the structure into the object, so we don't have
+	 * to. Once that's done, we need to repatch the object to have the
+	 * right class since AllocClass interferes with that.
+	 */
+
+	AllocClass(interp, oPtr);
+	oPtr->selfCls = classPtr;
+	TclOOAddToSubclasses(oPtr->classPtr, fPtr->objectCls);
+    } else {
+	oPtr->classPtr = NULL;
+    }
+
+    /*
+     * Run constructors, except when objc < 0 (a special flag case used for
+     * object cloning only).
+     */
+
+    if (objc >= 0) {
+	CallContext *contextPtr =
+		TclOOGetCallContext(oPtr, NULL, CONSTRUCTOR, NULL);
+
+	if (contextPtr != NULL) {
+	    int isRoot, result;
+	    Tcl_InterpState state;
+
+	    state = Tcl_SaveInterpState(interp, TCL_OK);
+	    contextPtr->callPtr->flags |= CONSTRUCTOR;
+	    contextPtr->skip = skip;
+
+	    /*
+	     * Adjust the ensmble tracking record if necessary. [Bug 3514761]
+	     */
+
+	    isRoot = TclInitRewriteEnsemble(interp, skip, skip, objv);
+	    result = Tcl_NRCallObjProc(interp, TclOOInvokeContext, contextPtr,
+		    objc, objv);
+
+	    if (isRoot) {
+		TclResetRewriteEnsemble(interp, 1);
+	    }
+
+	    /*
+	     * It's an error if the object was whacked in the constructor.
+	     * Force this if it isn't already an error (don't want to lose
+	     * errors by accident...) [Bug 2903011]
+	     */
+
+	    if (result != TCL_ERROR && Deleted(oPtr)) {
+		Tcl_SetObjResult(interp, Tcl_NewStringObj(
+			"object deleted in constructor", -1));
+		Tcl_SetErrorCode(interp, "TCL", "OO", "STILLBORN", NULL);
+		result = TCL_ERROR;
+	    }
+	    TclOODeleteContext(contextPtr);
+	    if (result != TCL_OK) {
+		Tcl_DiscardInterpState(state);
+
+		/*
+		 * Take care to not delete a deleted object; that would be
+		 * bad. [Bug 2903011] Also take care to make sure that we have
+		 * the name of the command before we delete it. [Bug
+		 * 9dd1bd7a74]
+		 */
+
+		if (!Deleted(oPtr)) {
+		    (void) TclOOObjectName(interp, oPtr);
+		    Tcl_DeleteCommandFromToken(interp, oPtr->command);
+		}
+		return NULL;
+	    }
+	    Tcl_RestoreInterpState(interp, state);
+	}
+    }
+
+    return (Tcl_Object) oPtr;
+}
+
+int
+TclNRNewObjectInstance(
+    Tcl_Interp *interp,		/* Interpreter context. */
+    Tcl_Class cls,		/* Class to create an instance of. */
+    const char *nameStr,	/* Name of object to create, or NULL to ask
+				 * the code to pick its own unique name. */
+    const char *nsNameStr,	/* Name of namespace to create inside object,
+				 * or NULL to ask the code to pick its own
+				 * unique name. */
+    int objc,			/* Number of arguments. Negative value means
+				 * do not call constructor. */
+    Tcl_Obj *const *objv,	/* Argument list. */
+    int skip,			/* Number of arguments to _not_ pass to the
+				 * constructor. */
+    Tcl_Object *objectPtr)	/* Place to write the object reference upon
+				 * successful allocation. */
+{
+    register Class *classPtr = (Class *) cls;
+    Foundation *fPtr = GetFoundation(interp);
+    CallContext *contextPtr;
+    Tcl_InterpState state;
+    Object *oPtr;
+
+    /*
+     * Protect classPtr from getting cleaned up when the command is created.
+     */
+    AddRef(classPtr);
+
+    /*
+     * Check if we're going to create an object over an existing command;
+     * that's not allowed.
+     */
+
+    if (nameStr && Tcl_FindCommand(interp, nameStr, NULL,
+	    TCL_NAMESPACE_ONLY)) {
+	Tcl_SetObjResult(interp, Tcl_ObjPrintf(
+		"can't create object \"%s\": command already exists with"
+		" that name", nameStr));
+	Tcl_SetErrorCode(interp, "TCL", "OO", "OVERWRITE_OBJECT", NULL);
+	return TCL_ERROR;
+    }
+
+    /*
+     * Create the object.
+     */
+
+    oPtr = AllocObject(interp, nameStr, nsNameStr);
+    oPtr->selfCls = classPtr;
+    TclOOAddToInstances(oPtr, classPtr);
+
+    /*
+     * Check to see if we're really creating a class. If so, allocate the
+     * class structure as well.
+     */
+
+    if (TclOOIsReachable(fPtr->classCls, classPtr)) {
+	/*
+	 * Is a class, so attach a class structure. Note that the AllocClass
+	 * function splices the structure into the object, so we don't have
+	 * to. Once that's done, we need to repatch the object to have the
+	 * right class since AllocClass interferes with that.
+	 */
+
+	AllocClass(interp, oPtr);
+	oPtr->selfCls = classPtr;
+	TclOOAddToSubclasses(oPtr->classPtr, fPtr->objectCls);
+    }
+
+    /*
+     * Run constructors, except when objc < 0 (a special flag case used for
+     * object cloning only). If there aren't any constructors, we do nothing.
+     */
+
+    if (objc < 0) {
+	*objectPtr = (Tcl_Object) oPtr;
+	DelRef(classPtr);
+	return TCL_OK;
+    }
+    contextPtr = TclOOGetCallContext(oPtr, NULL, CONSTRUCTOR, NULL);
+    if (contextPtr == NULL) {
+	*objectPtr = (Tcl_Object) oPtr;
+	DelRef(classPtr);
+	return TCL_OK;
+    }
+
+    state = Tcl_SaveInterpState(interp, TCL_OK);
+    contextPtr->callPtr->flags |= CONSTRUCTOR;
+    contextPtr->skip = skip;
+
+    /*
+     * Adjust the ensmble tracking record if necessary. [Bug 3514761]
+     */
+
+    if (TclInitRewriteEnsemble(interp, skip, skip, objv)) {
+	TclNRAddCallback(interp, TclClearRootEnsemble, NULL, NULL, NULL, NULL);
+    }
+
+    /*
+     * Fire off the constructors non-recursively.
+     */
+
+    AddRef(oPtr);
+    TclNRAddCallback(interp, FinalizeAlloc, contextPtr, oPtr, state,
+	    objectPtr);
+    TclPushTailcallPoint(interp);
+    DelRef(classPtr);
+    return TclOOInvokeContext(contextPtr, interp, objc, objv);
+}
+
+static int
+FinalizeAlloc(
+    ClientData data[],
+    Tcl_Interp *interp,
+    int result)
+{
+    CallContext *contextPtr = data[0];
+    Object *oPtr = data[1];
+    Tcl_InterpState state = data[2];
+    Tcl_Object *objectPtr = data[3];
+
+    /*
+     * It's an error if the object was whacked in the constructor. Force this
+     * if it isn't already an error (don't want to lose errors by accident...)
+     * [Bug 2903011]
+     */
+
+    if (result != TCL_ERROR && Deleted(oPtr)) {
+	Tcl_SetObjResult(interp, Tcl_NewStringObj(
+		"object deleted in constructor", -1));
+	Tcl_SetErrorCode(interp, "TCL", "OO", "STILLBORN", NULL);
+	result = TCL_ERROR;
+    }
+    TclOODeleteContext(contextPtr);
+    if (result != TCL_OK) {
+	Tcl_DiscardInterpState(state);
+
+	/*
+	 * Take care to not delete a deleted object; that would be bad. [Bug
+	 * 2903011] Also take care to make sure that we have the name of the
+	 * command before we delete it. [Bug 9dd1bd7a74]
+	 */
+
+	if (!Deleted(oPtr)) {
+	    (void) TclOOObjectName(interp, oPtr);
+	    Tcl_DeleteCommandFromToken(interp, oPtr->command);
+	}
+	DelRef(oPtr);
+	return TCL_ERROR;
+    }
+    Tcl_RestoreInterpState(interp, state);
+    *objectPtr = (Tcl_Object) oPtr;
+    DelRef(oPtr);
+    return TCL_OK;
+}
+
+/*
+ * ----------------------------------------------------------------------
+ *
+ * Tcl_CopyObjectInstance --
+ *
+ *	Creates a copy of an object. Does not copy the backing namespace,
+ *	since the correct way to do that (e.g., shallow/deep) depends on the
+ *	object/class's own policies.
+ *
+ * ----------------------------------------------------------------------
+ */
+
+Tcl_Object
+Tcl_CopyObjectInstance(
+    Tcl_Interp *interp,
+    Tcl_Object sourceObject,
+    const char *targetName,
+    const char *targetNamespaceName)
+{
+    Object *oPtr = (Object *) sourceObject, *o2Ptr;
+    FOREACH_HASH_DECLS;
+    Method *mPtr;
+    Class *mixinPtr;
+    CallContext *contextPtr;
+    Tcl_Obj *keyPtr, *filterObj, *variableObj, *args[3];
+    int i, result;
+
+    /*
+     * Sanity check.
+     */
+
+    if (IsRootClass(oPtr)) {
+	Tcl_SetObjResult(interp, Tcl_NewStringObj(
+		"may not clone the class of classes", -1));
+	Tcl_SetErrorCode(interp, "TCL", "OO", "CLONING_CLASS", NULL);
+	return NULL;
+    }
+
+    /*
+     * Build the instance. Note that this does not run any constructors.
+     */
+
+    o2Ptr = (Object *) Tcl_NewObjectInstance(interp,
+	    (Tcl_Class) oPtr->selfCls, targetName, targetNamespaceName, -1,
+	    NULL, -1);
+    if (o2Ptr == NULL) {
+	return NULL;
+    }
+
+    /*
+     * Copy the object-local methods to the new object.
+     */
+
+    if (oPtr->methodsPtr) {
+	FOREACH_HASH(keyPtr, mPtr, oPtr->methodsPtr) {
+	    if (CloneObjectMethod(interp, o2Ptr, mPtr, keyPtr) != TCL_OK) {
+		Tcl_DeleteCommandFromToken(interp, o2Ptr->command);
+		return NULL;
+	    }
+	}
+    }
+
+    /*
+     * Copy the object's mixin references to the new object.
+     */
+
+    FOREACH(mixinPtr, o2Ptr->mixins) {
+	if (mixinPtr && mixinPtr != o2Ptr->selfCls) {
+	    TclOORemoveFromInstances(o2Ptr, mixinPtr);
+	}
+    }
+    DUPLICATE(o2Ptr->mixins, oPtr->mixins, Class *);
+    FOREACH(mixinPtr, o2Ptr->mixins) {
+	if (mixinPtr && mixinPtr != o2Ptr->selfCls) {
+	    TclOOAddToInstances(o2Ptr, mixinPtr);
+	}
+    }
+
+    /*
+     * Copy the object's filter list to the new object.
+     */
+
+    DUPLICATE(o2Ptr->filters, oPtr->filters, Tcl_Obj *);
+    FOREACH(filterObj, o2Ptr->filters) {
+	Tcl_IncrRefCount(filterObj);
+    }
+
+    /*
+     * Copy the object's variable resolution list to the new object.
+     */
+
+    DUPLICATE(o2Ptr->variables, oPtr->variables, Tcl_Obj *);
+    FOREACH(variableObj, o2Ptr->variables) {
+	Tcl_IncrRefCount(variableObj);
+    }
+
+    /*
+     * Copy the object's flags to the new object, clearing those that must be
+     * kept object-local. The duplicate is never deleted at this point, nor is
+     * it the root of the object system or in the midst of processing a filter
+     * call.
+     */
+
+    o2Ptr->flags = oPtr->flags & ~(
+	    OBJECT_DELETED | ROOT_OBJECT | ROOT_CLASS | FILTER_HANDLING);
+
+    /*
+     * Copy the object's metadata.
+     */
+
+    if (oPtr->metadataPtr != NULL) {
+	Tcl_ObjectMetadataType *metadataTypePtr;
+	ClientData value, duplicate;
+
+	FOREACH_HASH(metadataTypePtr, value, oPtr->metadataPtr) {
+	    if (metadataTypePtr->cloneProc == NULL) {
+		duplicate = value;
+	    } else {
+		if (metadataTypePtr->cloneProc(interp, value,
+			&duplicate) != TCL_OK) {
+		    Tcl_DeleteCommandFromToken(interp, o2Ptr->command);
+		    return NULL;
+		}
+	    }
+	    if (duplicate != NULL) {
+		Tcl_ObjectSetMetadata((Tcl_Object) o2Ptr, metadataTypePtr,
+			duplicate);
+	    }
+	}
+    }
+
+    /*
+     * Copy the class, if present. Note that if there is a class present in
+     * the source object, there must also be one in the copy.
+     */
+
+    if (oPtr->classPtr != NULL) {
+	Class *clsPtr = oPtr->classPtr;
+	Class *cls2Ptr = o2Ptr->classPtr;
+	Class *superPtr;
+
+	/*
+	 * Copy the class flags across.
+	 */
+
+	cls2Ptr->flags = clsPtr->flags;
+
+	/*
+	 * Ensure that the new class's superclass structure is the same as the
+	 * old class's.
+	 */
+
+	FOREACH(superPtr, cls2Ptr->superclasses) {
+	    TclOORemoveFromSubclasses(cls2Ptr, superPtr);
+	}
+	if (cls2Ptr->superclasses.num) {
+	    cls2Ptr->superclasses.list = ckrealloc(cls2Ptr->superclasses.list,
+		    sizeof(Class *) * clsPtr->superclasses.num);
+	} else {
+	    cls2Ptr->superclasses.list =
+		    ckalloc(sizeof(Class *) * clsPtr->superclasses.num);
+	}
+	memcpy(cls2Ptr->superclasses.list, clsPtr->superclasses.list,
+		sizeof(Class *) * clsPtr->superclasses.num);
+	cls2Ptr->superclasses.num = clsPtr->superclasses.num;
+	FOREACH(superPtr, cls2Ptr->superclasses) {
+	    TclOOAddToSubclasses(cls2Ptr, superPtr);
+	}
+
+	/*
+	 * Duplicate the source class's filters.
+	 */
+
+	DUPLICATE(cls2Ptr->filters, clsPtr->filters, Tcl_Obj *);
+	FOREACH(filterObj, cls2Ptr->filters) {
+	    Tcl_IncrRefCount(filterObj);
+	}
+
+	/*
+	 * Copy the source class's variable resolution list.
+	 */
+
+	DUPLICATE(cls2Ptr->variables, clsPtr->variables, Tcl_Obj *);
+	FOREACH(variableObj, cls2Ptr->variables) {
+	    Tcl_IncrRefCount(variableObj);
+	}
+
+	/*
+	 * Duplicate the source class's mixins (which cannot be circular
+	 * references to the duplicate).
+	 */
+
+	FOREACH(mixinPtr, cls2Ptr->mixins) {
+	    TclOORemoveFromMixinSubs(cls2Ptr, mixinPtr);
+	}
+	if (cls2Ptr->mixins.num != 0) {
+	    ckfree(clsPtr->mixins.list);
+	}
+	DUPLICATE(cls2Ptr->mixins, clsPtr->mixins, Class *);
+	FOREACH(mixinPtr, cls2Ptr->mixins) {
+	    TclOOAddToMixinSubs(cls2Ptr, mixinPtr);
+	}
+
+	/*
+	 * Duplicate the source class's methods, constructor and destructor.
+	 */
+
+	FOREACH_HASH(keyPtr, mPtr, &clsPtr->classMethods) {
+	    if (CloneClassMethod(interp, cls2Ptr, mPtr, keyPtr,
+		    NULL) != TCL_OK) {
+		Tcl_DeleteCommandFromToken(interp, o2Ptr->command);
+		return NULL;
+	    }
+	}
+	if (clsPtr->constructorPtr) {
+	    if (CloneClassMethod(interp, cls2Ptr, clsPtr->constructorPtr,
+		    NULL, &cls2Ptr->constructorPtr) != TCL_OK) {
+		Tcl_DeleteCommandFromToken(interp, o2Ptr->command);
+		return NULL;
+	    }
+	}
+	if (clsPtr->destructorPtr) {
+	    if (CloneClassMethod(interp, cls2Ptr, clsPtr->destructorPtr, NULL,
+		    &cls2Ptr->destructorPtr) != TCL_OK) {
+		Tcl_DeleteCommandFromToken(interp, o2Ptr->command);
+		return NULL;
+	    }
+	}
+
+	/*
+	 * Duplicate the class's metadata.
+	 */
+
+	if (clsPtr->metadataPtr != NULL) {
+	    Tcl_ObjectMetadataType *metadataTypePtr;
+	    ClientData value, duplicate;
+
+	    FOREACH_HASH(metadataTypePtr, value, clsPtr->metadataPtr) {
+		if (metadataTypePtr->cloneProc == NULL) {
+		    duplicate = value;
+		} else {
+		    if (metadataTypePtr->cloneProc(interp, value,
+			    &duplicate) != TCL_OK) {
+			Tcl_DeleteCommandFromToken(interp, o2Ptr->command);
+			return NULL;
+		    }
+		}
+		if (duplicate != NULL) {
+		    Tcl_ClassSetMetadata((Tcl_Class) cls2Ptr, metadataTypePtr,
+			    duplicate);
+		}
+	    }
+	}
+    }
+
+    TclResetRewriteEnsemble(interp, 1);
+    contextPtr = TclOOGetCallContext(o2Ptr, oPtr->fPtr->clonedName, 0, NULL);
+    if (contextPtr) {
+	args[0] = TclOOObjectName(interp, o2Ptr);
+	args[1] = oPtr->fPtr->clonedName;
+	args[2] = TclOOObjectName(interp, oPtr);
+	Tcl_IncrRefCount(args[0]);
+	Tcl_IncrRefCount(args[1]);
+	Tcl_IncrRefCount(args[2]);
+	result = Tcl_NRCallObjProc(interp, TclOOInvokeContext, contextPtr, 3,
+		args);
+	TclDecrRefCount(args[0]);
+	TclDecrRefCount(args[1]);
+	TclDecrRefCount(args[2]);
+	TclOODeleteContext(contextPtr);
+	if (result == TCL_ERROR) {
+	    Tcl_AddErrorInfo(interp,
+		    "\n    (while performing post-copy callback)");
+	}
+	if (result != TCL_OK) {
+	    Tcl_DeleteCommandFromToken(interp, o2Ptr->command);
+	    return NULL;
+	}
+    }
+
+    return (Tcl_Object) o2Ptr;
+}
+
+/*
+ * ----------------------------------------------------------------------
+ *
+ * CloneObjectMethod, CloneClassMethod --
+ *
+ *	Helper functions used for cloning methods. They work identically to
+ *	each other, except for the difference between them in how they
+ *	register the cloned method on a successful clone.
+ *
+ * ----------------------------------------------------------------------
+ */
+
+static int
+CloneObjectMethod(
+    Tcl_Interp *interp,
+    Object *oPtr,
+    Method *mPtr,
+    Tcl_Obj *namePtr)
+{
+    if (mPtr->typePtr == NULL) {
+	Tcl_NewInstanceMethod(interp, (Tcl_Object) oPtr, namePtr,
+		mPtr->flags & PUBLIC_METHOD, NULL, NULL);
+    } else if (mPtr->typePtr->cloneProc) {
+	ClientData newClientData;
+
+	if (mPtr->typePtr->cloneProc(interp, mPtr->clientData,
+		&newClientData) != TCL_OK) {
+	    return TCL_ERROR;
+	}
+	Tcl_NewInstanceMethod(interp, (Tcl_Object) oPtr, namePtr,
+		mPtr->flags & PUBLIC_METHOD, mPtr->typePtr, newClientData);
+    } else {
+	Tcl_NewInstanceMethod(interp, (Tcl_Object) oPtr, namePtr,
+		mPtr->flags & PUBLIC_METHOD, mPtr->typePtr, mPtr->clientData);
+    }
+    return TCL_OK;
+}
+
+static int
+CloneClassMethod(
+    Tcl_Interp *interp,
+    Class *clsPtr,
+    Method *mPtr,
+    Tcl_Obj *namePtr,
+    Method **m2PtrPtr)
+{
+    Method *m2Ptr;
+
+    if (mPtr->typePtr == NULL) {
+	m2Ptr = (Method *) Tcl_NewMethod(interp, (Tcl_Class) clsPtr,
+		namePtr, mPtr->flags & PUBLIC_METHOD, NULL, NULL);
+    } else if (mPtr->typePtr->cloneProc) {
+	ClientData newClientData;
+
+	if (mPtr->typePtr->cloneProc(interp, mPtr->clientData,
+		&newClientData) != TCL_OK) {
+	    return TCL_ERROR;
+	}
+	m2Ptr = (Method *) Tcl_NewMethod(interp, (Tcl_Class) clsPtr,
+		namePtr, mPtr->flags & PUBLIC_METHOD, mPtr->typePtr,
+		newClientData);
+    } else {
+	m2Ptr = (Method *) Tcl_NewMethod(interp, (Tcl_Class) clsPtr,
+		namePtr, mPtr->flags & PUBLIC_METHOD, mPtr->typePtr,
+		mPtr->clientData);
+    }
+    if (m2PtrPtr != NULL) {
+	*m2PtrPtr = m2Ptr;
+    }
+    return TCL_OK;
+}
+
+/*
+ * ----------------------------------------------------------------------
+ *
+ * Tcl_ClassGetMetadata, Tcl_ClassSetMetadata, Tcl_ObjectGetMetadata,
+ * Tcl_ObjectSetMetadata --
+ *
+ *	Metadata management API. The metadata system allows code in extensions
+ *	to attach arbitrary non-NULL pointers to objects and classes without
+ *	the different things that might be interested being able to interfere
+ *	with each other. Apart from non-NULL-ness, these routines attach no
+ *	interpretation to the meaning of the metadata pointers.
+ *
+ *	The Tcl_*GetMetadata routines get the metadata pointer attached that
+ *	has been related with a particular type, or NULL if no metadata
+ *	associated with the given type has been attached.
+ *
+ *	The Tcl_*SetMetadata routines set or delete the metadata pointer that
+ *	is related to a particular type. The value associated with the type is
+ *	deleted (if present; no-op otherwise) if the value is NULL, and
+ *	attached (replacing the previous value, which is deleted if present)
+ *	otherwise. This means it is impossible to attach a NULL value for any
+ *	metadata type.
+ *
+ * ----------------------------------------------------------------------
+ */
+
+ClientData
+Tcl_ClassGetMetadata(
+    Tcl_Class clazz,
+    const Tcl_ObjectMetadataType *typePtr)
+{
+    Class *clsPtr = (Class *) clazz;
+    Tcl_HashEntry *hPtr;
+
+    /*
+     * If there's no metadata store attached, the type in question has
+     * definitely not been attached either!
+     */
+
+    if (clsPtr->metadataPtr == NULL) {
+	return NULL;
+    }
+
+    /*
+     * There is a metadata store, so look in it for the given type.
+     */
+
+    hPtr = Tcl_FindHashEntry(clsPtr->metadataPtr, (char *) typePtr);
+
+    /*
+     * Return the metadata value if we found it, otherwise NULL.
+     */
+
+    if (hPtr == NULL) {
+	return NULL;
+    }
+    return Tcl_GetHashValue(hPtr);
+}
+
+void
+Tcl_ClassSetMetadata(
+    Tcl_Class clazz,
+    const Tcl_ObjectMetadataType *typePtr,
+    ClientData metadata)
+{
+    Class *clsPtr = (Class *) clazz;
+    Tcl_HashEntry *hPtr;
+    int isNew;
+
+    /*
+     * Attach the metadata store if not done already.
+     */
+
+    if (clsPtr->metadataPtr == NULL) {
+	if (metadata == NULL) {
+	    return;
+	}
+	clsPtr->metadataPtr = ckalloc(sizeof(Tcl_HashTable));
+	Tcl_InitHashTable(clsPtr->metadataPtr, TCL_ONE_WORD_KEYS);
+    }
+
+    /*
+     * If the metadata is NULL, we're deleting the metadata for the type.
+     */
+
+    if (metadata == NULL) {
+	hPtr = Tcl_FindHashEntry(clsPtr->metadataPtr, (char *) typePtr);
+	if (hPtr != NULL) {
+	    typePtr->deleteProc(Tcl_GetHashValue(hPtr));
+	    Tcl_DeleteHashEntry(hPtr);
+	}
+	return;
+    }
+
+    /*
+     * Otherwise we're attaching the metadata. Note that if there was already
+     * some metadata attached of this type, we delete that first.
+     */
+
+    hPtr = Tcl_CreateHashEntry(clsPtr->metadataPtr, (char *) typePtr, &isNew);
+    if (!isNew) {
+	typePtr->deleteProc(Tcl_GetHashValue(hPtr));
+    }
+    Tcl_SetHashValue(hPtr, metadata);
+}
+
+ClientData
+Tcl_ObjectGetMetadata(
+    Tcl_Object object,
+    const Tcl_ObjectMetadataType *typePtr)
+{
+    Object *oPtr = (Object *) object;
+    Tcl_HashEntry *hPtr;
+
+    /*
+     * If there's no metadata store attached, the type in question has
+     * definitely not been attached either!
+     */
+
+    if (oPtr->metadataPtr == NULL) {
+	return NULL;
+    }
+
+    /*
+     * There is a metadata store, so look in it for the given type.
+     */
+
+    hPtr = Tcl_FindHashEntry(oPtr->metadataPtr, (char *) typePtr);
+
+    /*
+     * Return the metadata value if we found it, otherwise NULL.
+     */
+
+    if (hPtr == NULL) {
+	return NULL;
+    }
+    return Tcl_GetHashValue(hPtr);
+}
+
+void
+Tcl_ObjectSetMetadata(
+    Tcl_Object object,
+    const Tcl_ObjectMetadataType *typePtr,
+    ClientData metadata)
+{
+    Object *oPtr = (Object *) object;
+    Tcl_HashEntry *hPtr;
+    int isNew;
+
+    /*
+     * Attach the metadata store if not done already.
+     */
+
+    if (oPtr->metadataPtr == NULL) {
+	if (metadata == NULL) {
+	    return;
+	}
+	oPtr->metadataPtr = ckalloc(sizeof(Tcl_HashTable));
+	Tcl_InitHashTable(oPtr->metadataPtr, TCL_ONE_WORD_KEYS);
+    }
+
+    /*
+     * If the metadata is NULL, we're deleting the metadata for the type.
+     */
+
+    if (metadata == NULL) {
+	hPtr = Tcl_FindHashEntry(oPtr->metadataPtr, (char *) typePtr);
+	if (hPtr != NULL) {
+	    typePtr->deleteProc(Tcl_GetHashValue(hPtr));
+	    Tcl_DeleteHashEntry(hPtr);
+	}
+	return;
+    }
+
+    /*
+     * Otherwise we're attaching the metadata. Note that if there was already
+     * some metadata attached of this type, we delete that first.
+     */
+
+    hPtr = Tcl_CreateHashEntry(oPtr->metadataPtr, (char *) typePtr, &isNew);
+    if (!isNew) {
+	typePtr->deleteProc(Tcl_GetHashValue(hPtr));
+    }
+    Tcl_SetHashValue(hPtr, metadata);
+}
+
+/*
+ * ----------------------------------------------------------------------
+ *
+ * PublicObjectCmd, PrivateObjectCmd, TclOOInvokeObject --
+ *
+ *	Main entry point for object invocations. The Public* and Private*
+ *	wrapper functions (implementations of both object instance commands
+ *	and [my]) are just thin wrappers round the main TclOOObjectCmdCore
+ *	function. Note that the core is function is NRE-aware.
+ *
+ * ----------------------------------------------------------------------
+ */
+
+static int
+PublicObjectCmd(
+    ClientData clientData,
+    Tcl_Interp *interp,
+    int objc,
+    Tcl_Obj *const *objv)
+{
+    return Tcl_NRCallObjProc(interp, PublicNRObjectCmd, clientData,objc,objv);
+}
+
+static int
+PublicNRObjectCmd(
+    ClientData clientData,
+    Tcl_Interp *interp,
+    int objc,
+    Tcl_Obj *const *objv)
+{
+    return TclOOObjectCmdCore(clientData, interp, objc, objv, PUBLIC_METHOD,
+	    NULL);
+}
+
+static int
+PrivateObjectCmd(
+    ClientData clientData,
+    Tcl_Interp *interp,
+    int objc,
+    Tcl_Obj *const *objv)
+{
+    return Tcl_NRCallObjProc(interp, PrivateNRObjectCmd,clientData,objc,objv);
+}
+
+static int
+PrivateNRObjectCmd(
+    ClientData clientData,
+    Tcl_Interp *interp,
+    int objc,
+    Tcl_Obj *const *objv)
+{
+    return TclOOObjectCmdCore(clientData, interp, objc, objv, 0, NULL);
+}
+
+int
+TclOOInvokeObject(
+    Tcl_Interp *interp,		/* Interpreter for commands, variables,
+				 * results, error reporting, etc. */
+    Tcl_Object object,		/* The object to invoke. */
+    Tcl_Class startCls,		/* Where in the class chain to start the
+				 * invoke from, or NULL to traverse the whole
+				 * chain including filters. */
+    int publicPrivate,		/* Whether this is an invoke from a public
+				 * context (PUBLIC_METHOD), a private context
+				 * (PRIVATE_METHOD), or a *really* private
+				 * context (any other value; conventionally
+				 * 0). */
+    int objc,			/* Number of arguments. */
+    Tcl_Obj *const *objv)	/* Array of argument objects. It is assumed
+				 * that the name of the method to invoke will
+				 * be at index 1. */
+{
+    switch (publicPrivate) {
+    case PUBLIC_METHOD:
+	return TclOOObjectCmdCore((Object *) object, interp, objc, objv,
+		PUBLIC_METHOD, (Class *) startCls);
+    case PRIVATE_METHOD:
+	return TclOOObjectCmdCore((Object *) object, interp, objc, objv,
+		PRIVATE_METHOD, (Class *) startCls);
+    default:
+	return TclOOObjectCmdCore((Object *) object, interp, objc, objv, 0,
+		(Class *) startCls);
+    }
+}
+
+/*
+ * ----------------------------------------------------------------------
+ *
+ * TclOOObjectCmdCore, FinalizeObjectCall --
+ *
+ *	Main function for object invocations. Does call chain creation,
+ *	management and invocation. The function FinalizeObjectCall exists to
+ *	clean up after the non-recursive processing of TclOOObjectCmdCore.
+ *
+ * ----------------------------------------------------------------------
+ */
+
+int
+TclOOObjectCmdCore(
+    Object *oPtr,		/* The object being invoked. */
+    Tcl_Interp *interp,		/* The interpreter containing the object. */
+    int objc,			/* How many arguments are being passed in. */
+    Tcl_Obj *const *objv,	/* The array of arguments. */
+    int flags,			/* Whether this is an invocation through the
+				 * public or the private command interface. */
+    Class *startCls)		/* Where to start in the call chain, or NULL
+				 * if we are to start at the front with
+				 * filters and the object's methods (which is
+				 * the normal case). */
+{
+    CallContext *contextPtr;
+    Tcl_Obj *methodNamePtr;
+    int result;
+
+    /*
+     * If we've no method name, throw this directly into the unknown
+     * processing.
+     */
+
+    if (objc < 2) {
+	flags |= FORCE_UNKNOWN;
+	methodNamePtr = NULL;
+	goto noMapping;
+    }
+
+    /*
+     * Give plugged in code a chance to remap the method name.
+     */
+
+    methodNamePtr = objv[1];
+    if (oPtr->mapMethodNameProc != NULL) {
+	register Class **startClsPtr = &startCls;
+	Tcl_Obj *mappedMethodName = Tcl_DuplicateObj(methodNamePtr);
+
+	result = oPtr->mapMethodNameProc(interp, (Tcl_Object) oPtr,
+		(Tcl_Class *) startClsPtr, mappedMethodName);
+	if (result != TCL_OK) {
+	    TclDecrRefCount(mappedMethodName);
+	    if (result == TCL_BREAK) {
+		goto noMapping;
+	    } else if (result == TCL_ERROR) {
+		Tcl_AddErrorInfo(interp, "\n    (while mapping method name)");
+	    }
+	    return result;
+	}
+
+	/*
+	 * Get the call chain for the remapped name.
+	 */
+
+	Tcl_IncrRefCount(mappedMethodName);
+	contextPtr = TclOOGetCallContext(oPtr, mappedMethodName,
+		flags | (oPtr->flags & FILTER_HANDLING), methodNamePtr);
+	TclDecrRefCount(mappedMethodName);
+	if (contextPtr == NULL) {
+	    Tcl_SetObjResult(interp, Tcl_ObjPrintf(
+		    "impossible to invoke method \"%s\": no defined method or"
+		    " unknown method", TclGetString(methodNamePtr)));
+	    Tcl_SetErrorCode(interp, "TCL", "LOOKUP", "METHOD_MAPPED",
+		    TclGetString(methodNamePtr), NULL);
+	    return TCL_ERROR;
+	}
+    } else {
+	/*
+	 * Get the call chain.
+	 */
+
+    noMapping:
+	contextPtr = TclOOGetCallContext(oPtr, methodNamePtr,
+		flags | (oPtr->flags & FILTER_HANDLING), NULL);
+	if (contextPtr == NULL) {
+	    Tcl_SetObjResult(interp, Tcl_ObjPrintf(
+		    "impossible to invoke method \"%s\": no defined method or"
+		    " unknown method", TclGetString(methodNamePtr)));
+	    Tcl_SetErrorCode(interp, "TCL", "LOOKUP", "METHOD",
+		    TclGetString(methodNamePtr), NULL);
+	    return TCL_ERROR;
+	}
+    }
+
+    /*
+     * Check to see if we need to apply magical tricks to start part way
+     * through the call chain.
+     */
+
+    if (startCls != NULL) {
+	for (; contextPtr->index < contextPtr->callPtr->numChain;
+		contextPtr->index++) {
+	    register struct MInvoke *miPtr =
+		    &contextPtr->callPtr->chain[contextPtr->index];
+
+	    if (miPtr->isFilter) {
+		continue;
+	    }
+	    if (miPtr->mPtr->declaringClassPtr == startCls) {
+		break;
+	    }
+	}
+	if (contextPtr->index >= contextPtr->callPtr->numChain) {
+	    Tcl_SetObjResult(interp, Tcl_NewStringObj(
+		    "no valid method implementation", -1));
+	    Tcl_SetErrorCode(interp, "TCL", "LOOKUP", "METHOD",
+		    TclGetString(methodNamePtr), NULL);
+	    TclOODeleteContext(contextPtr);
+	    return TCL_ERROR;
+	}
+    }
+
+    /*
+     * Invoke the call chain, locking the object structure against deletion
+     * for the duration.
+     */
+
+    TclNRAddCallback(interp, FinalizeObjectCall, contextPtr, NULL,NULL,NULL);
+    return TclOOInvokeContext(contextPtr, interp, objc, objv);
+}
+
+static int
+FinalizeObjectCall(
+    ClientData data[],
+    Tcl_Interp *interp,
+    int result)
+{
+    /*
+     * Dispose of the call chain, which drops the lock on the object's
+     * structure.
+     */
+
+    TclOODeleteContext(data[0]);
+    return result;
+}
+
+/*
+ * ----------------------------------------------------------------------
+ *
+ * Tcl_ObjectContextInvokeNext, TclNRObjectContextInvokeNext, FinalizeNext --
+ *
+ *	Invokes the next stage of the call chain described in an object
+ *	context. This is the core of the implementation of the [next] command.
+ *	Does not do management of the call-frame stack. Available in public
+ *	(standard API) and private (NRE-aware) forms. FinalizeNext is a
+ *	private function used to clean up in the NRE case.
+ *
+ * ----------------------------------------------------------------------
+ */
+
+int
+Tcl_ObjectContextInvokeNext(
+    Tcl_Interp *interp,
+    Tcl_ObjectContext context,
+    int objc,
+    Tcl_Obj *const *objv,
+    int skip)
+{
+    CallContext *contextPtr = (CallContext *) context;
+    int savedIndex = contextPtr->index;
+    int savedSkip = contextPtr->skip;
+    int result;
+
+    if (contextPtr->index+1 >= contextPtr->callPtr->numChain) {
+	/*
+	 * We're at the end of the chain; generate an error message unless the
+	 * interpreter is being torn down, in which case we might be getting
+	 * here because of methods/destructors doing a [next] (or equivalent)
+	 * unexpectedly.
+	 */
+
+	const char *methodType;
+
+	if (Tcl_InterpDeleted(interp)) {
+	    return TCL_OK;
+	}
+
+	if (contextPtr->callPtr->flags & CONSTRUCTOR) {
+	    methodType = "constructor";
+	} else if (contextPtr->callPtr->flags & DESTRUCTOR) {
+	    methodType = "destructor";
+	} else {
+	    methodType = "method";
+	}
+
+	Tcl_SetObjResult(interp, Tcl_ObjPrintf(
+		"no next %s implementation", methodType));
+	Tcl_SetErrorCode(interp, "TCL", "OO", "NOTHING_NEXT", NULL);
+	return TCL_ERROR;
+    }
+
+    /*
+     * Advance to the next method implementation in the chain in the method
+     * call context while we process the body. However, need to adjust the
+     * argument-skip control because we're guaranteed to have a single prefix
+     * arg (i.e., 'next') and not the variable amount that can happen because
+     * method invocations (i.e., '$obj meth' and 'my meth'), constructors
+     * (i.e., '$cls new' and '$cls create obj') and destructors (no args at
+     * all) come through the same code.
+     */
+
+    contextPtr->index++;
+    contextPtr->skip = skip;
+
+    /*
+     * Invoke the (advanced) method call context in the caller context.
+     */
+
+    result = Tcl_NRCallObjProc(interp, TclOOInvokeContext, contextPtr, objc,
+	    objv);
+
+    /*
+     * Restore the call chain context index as we've finished the inner invoke
+     * and want to operate in the outer context again.
+     */
+
+    contextPtr->index = savedIndex;
+    contextPtr->skip = savedSkip;
+
+    return result;
+}
+
+int
+TclNRObjectContextInvokeNext(
+    Tcl_Interp *interp,
+    Tcl_ObjectContext context,
+    int objc,
+    Tcl_Obj *const *objv,
+    int skip)
+{
+    register CallContext *contextPtr = (CallContext *) context;
+
+    if (contextPtr->index+1 >= contextPtr->callPtr->numChain) {
+	/*
+	 * We're at the end of the chain; generate an error message unless the
+	 * interpreter is being torn down, in which case we might be getting
+	 * here because of methods/destructors doing a [next] (or equivalent)
+	 * unexpectedly.
+	 */
+
+	const char *methodType;
+
+	if (Tcl_InterpDeleted(interp)) {
+	    return TCL_OK;
+	}
+
+	if (contextPtr->callPtr->flags & CONSTRUCTOR) {
+	    methodType = "constructor";
+	} else if (contextPtr->callPtr->flags & DESTRUCTOR) {
+	    methodType = "destructor";
+	} else {
+	    methodType = "method";
+	}
+
+	Tcl_SetObjResult(interp, Tcl_ObjPrintf(
+		"no next %s implementation", methodType));
+	Tcl_SetErrorCode(interp, "TCL", "OO", "NOTHING_NEXT", NULL);
+	return TCL_ERROR;
+    }
+
+    /*
+     * Advance to the next method implementation in the chain in the method
+     * call context while we process the body. However, need to adjust the
+     * argument-skip control because we're guaranteed to have a single prefix
+     * arg (i.e., 'next') and not the variable amount that can happen because
+     * method invocations (i.e., '$obj meth' and 'my meth'), constructors
+     * (i.e., '$cls new' and '$cls create obj') and destructors (no args at
+     * all) come through the same code.
+     */
+
+    TclNRAddCallback(interp, FinalizeNext, contextPtr,
+	    INT2PTR(contextPtr->index), INT2PTR(contextPtr->skip), NULL);
+    contextPtr->index++;
+    contextPtr->skip = skip;
+
+    /*
+     * Invoke the (advanced) method call context in the caller context.
+     */
+
+    return TclOOInvokeContext(contextPtr, interp, objc, objv);
+}
+
+static int
+FinalizeNext(
+    ClientData data[],
+    Tcl_Interp *interp,
+    int result)
+{
+    CallContext *contextPtr = data[0];
+
+    /*
+     * Restore the call chain context index as we've finished the inner invoke
+     * and want to operate in the outer context again.
+     */
+
+    contextPtr->index = PTR2INT(data[1]);
+    contextPtr->skip = PTR2INT(data[2]);
+    return result;
+}
+
+/*
+ * ----------------------------------------------------------------------
+ *
+ * Tcl_GetObjectFromObj --
+ *
+ *	Utility function to get an object from a Tcl_Obj containing its name.
+ *
+ * ----------------------------------------------------------------------
+ */
+
+Tcl_Object
+Tcl_GetObjectFromObj(
+    Tcl_Interp *interp,		/* Interpreter in which to locate the object.
+				 * Will have an error message placed in it if
+				 * the name does not refer to an object. */
+    Tcl_Obj *objPtr)		/* The name of the object to look up, which is
+				 * exactly the name of its public command. */
+{
+    Command *cmdPtr = (Command *) Tcl_GetCommandFromObj(interp, objPtr);
+
+    if (cmdPtr == NULL) {
+	goto notAnObject;
+    }
+    if (cmdPtr->objProc != PublicObjectCmd) {
+	cmdPtr = (Command *) TclGetOriginalCommand((Tcl_Command) cmdPtr);
+	if (cmdPtr == NULL || cmdPtr->objProc != PublicObjectCmd) {
+	    goto notAnObject;
+	}
+    }
+    return cmdPtr->objClientData;
+
+  notAnObject:
+    Tcl_SetObjResult(interp, Tcl_ObjPrintf(
+	    "%s does not refer to an object", TclGetString(objPtr)));
+    Tcl_SetErrorCode(interp, "TCL", "LOOKUP", "OBJECT", TclGetString(objPtr),
+	    NULL);
+    return NULL;
+}
+
+/*
+ * ----------------------------------------------------------------------
+ *
+ * TclOOIsReachable --
+ *
+ *	Utility function that tests whether a class is a subclass (whether
+ *	directly or indirectly) of another class.
+ *
+ * ----------------------------------------------------------------------
+ */
+
+int
+TclOOIsReachable(
+    Class *targetPtr,
+    Class *startPtr)
+{
+    int i;
+    Class *superPtr;
+
+  tailRecurse:
+    if (startPtr == targetPtr) {
+	return 1;
+    }
+    if (startPtr->superclasses.num == 1 && startPtr->mixins.num == 0) {
+	startPtr = startPtr->superclasses.list[0];
+	goto tailRecurse;
+    }
+    FOREACH(superPtr, startPtr->superclasses) {
+	if (TclOOIsReachable(targetPtr, superPtr)) {
+	    return 1;
+	}
+    }
+    FOREACH(superPtr, startPtr->mixins) {
+	if (TclOOIsReachable(targetPtr, superPtr)) {
+	    return 1;
+	}
+    }
+    return 0;
+}
+
+/*
+ * ----------------------------------------------------------------------
+ *
+ * TclOOObjectName, Tcl_GetObjectName --
+ *
+ *	Utility function that returns the name of the object. Note that this
+ *	simplifies cache management by keeping the code to do it in one place
+ *	and not sprayed all over. The value returned always has a reference
+ *	count of at least one.
+ *
+ * ----------------------------------------------------------------------
+ */
+
+Tcl_Obj *
+TclOOObjectName(
+    Tcl_Interp *interp,
+    Object *oPtr)
+{
+    Tcl_Obj *namePtr;
+
+    if (oPtr->cachedNameObj) {
+	return oPtr->cachedNameObj;
+    }
+    namePtr = Tcl_NewObj();
+    Tcl_GetCommandFullName(interp, oPtr->command, namePtr);
+    Tcl_IncrRefCount(namePtr);
+    oPtr->cachedNameObj = namePtr;
+    return namePtr;
+}
+
+Tcl_Obj *
+Tcl_GetObjectName(
+    Tcl_Interp *interp,
+    Tcl_Object object)
+{
+    return TclOOObjectName(interp, (Object *) object);
+}
+
+/*
+ * ----------------------------------------------------------------------
+ *
+ * assorted trivial 'getter' functions
+ *
+ * ----------------------------------------------------------------------
+ */
+
+Tcl_Method
+Tcl_ObjectContextMethod(
+    Tcl_ObjectContext context)
+{
+    CallContext *contextPtr = (CallContext *) context;
+    return (Tcl_Method) contextPtr->callPtr->chain[contextPtr->index].mPtr;
+}
+
+int
+Tcl_ObjectContextIsFiltering(
+    Tcl_ObjectContext context)
+{
+    CallContext *contextPtr = (CallContext *) context;
+    return contextPtr->callPtr->chain[contextPtr->index].isFilter;
+}
+
+Tcl_Object
+Tcl_ObjectContextObject(
+    Tcl_ObjectContext context)
+{
+    return (Tcl_Object) ((CallContext *)context)->oPtr;
+}
+
+int
+Tcl_ObjectContextSkippedArgs(
+    Tcl_ObjectContext context)
+{
+    return ((CallContext *)context)->skip;
+}
+
+Tcl_Namespace *
+Tcl_GetObjectNamespace(
+    Tcl_Object object)
+{
+    return ((Object *)object)->namespacePtr;
+}
+
+Tcl_Command
+Tcl_GetObjectCommand(
+    Tcl_Object object)
+{
+    return ((Object *)object)->command;
+}
+
+Tcl_Class
+Tcl_GetObjectAsClass(
+    Tcl_Object object)
+{
+    return (Tcl_Class) ((Object *)object)->classPtr;
+}
+
+int
+Tcl_ObjectDeleted(
+    Tcl_Object object)
+{
+    return Deleted(object) ? 1 : 0;
+}
+
+Tcl_Object
+Tcl_GetClassAsObject(
+    Tcl_Class clazz)
+{
+    return (Tcl_Object) ((Class *)clazz)->thisPtr;
+}
+
+Tcl_ObjectMapMethodNameProc *
+Tcl_ObjectGetMethodNameMapper(
+    Tcl_Object object)
+{
+    return ((Object *) object)->mapMethodNameProc;
+}
+
+void
+Tcl_ObjectSetMethodNameMapper(
+    Tcl_Object object,
+    Tcl_ObjectMapMethodNameProc *mapMethodNameProc)
+{
+    ((Object *) object)->mapMethodNameProc = mapMethodNameProc;
+}
+
+/*
+ * Local Variables:
+ * mode: c
+ * c-basic-offset: 4
+ * fill-column: 78
+ * End:
+ */
diff --git a/generic/tclProc.c b/generic/tclProc.c
index 28b6033..dc58cb0 100644
--- a/generic/tclProc.c
+++ b/generic/tclProc.c
@@ -124,8 +124,8 @@ Tcl_ProcObjCmd(
 {
     register Interp *iPtr = (Interp *) interp;
     Proc *procPtr;
-    const char *fullName;
-    const char *procName, *procArgs, *procBody;
+    const char *procName;
+    const char *simpleName, *procArgs, *procBody;
     Namespace *nsPtr, *altNsPtr, *cxtNsPtr;
     Tcl_Command cmd;
 
@@ -140,21 +140,21 @@ Tcl_ProcObjCmd(
      * namespace.
      */
 
-    fullName = TclGetString(objv[1]);
-    TclGetNamespaceForQualName(interp, fullName, NULL, 0,
-	    &nsPtr, &altNsPtr, &cxtNsPtr, &procName);
+    procName = TclGetString(objv[1]);
+    TclGetNamespaceForQualName(interp, procName, NULL, 0,
+	    &nsPtr, &altNsPtr, &cxtNsPtr, &simpleName);
 
     if (nsPtr == NULL) {
 	Tcl_SetObjResult(interp, Tcl_ObjPrintf(
 		"can't create procedure \"%s\": unknown namespace",
-		fullName));
+		procName));
 	Tcl_SetErrorCode(interp, "TCL", "VALUE", "COMMAND", NULL);
 	return TCL_ERROR;
     }
-    if (procName == NULL) {
+    if (simpleName == NULL) {
 	Tcl_SetObjResult(interp, Tcl_ObjPrintf(
 		"can't create procedure \"%s\": bad procedure name",
-		fullName));
+		procName));
 	Tcl_SetErrorCode(interp, "TCL", "VALUE", "COMMAND", NULL);
 	return TCL_ERROR;
     }
@@ -163,15 +163,15 @@ Tcl_ProcObjCmd(
      * Create the data structure to represent the procedure.
      */
 
-    if (TclCreateProc(interp, nsPtr, procName, objv[2], objv[3],
+    if (TclCreateProc(interp, nsPtr, simpleName, objv[2], objv[3],
 	    &procPtr) != TCL_OK) {
 	Tcl_AddErrorInfo(interp, "\n    (creating proc \"");
-	Tcl_AddErrorInfo(interp, procName);
+	Tcl_AddErrorInfo(interp, simpleName);
 	Tcl_AddErrorInfo(interp, "\")");
 	return TCL_ERROR;
     }
 
-    cmd = tclNRCreateCommandInNs(interp, procName, (Tcl_Namespace *) nsPtr,
+    cmd = TclNRCreateCommandInNs(interp, simpleName, (Tcl_Namespace *) nsPtr,
 	TclObjInterpProc, TclNRInterpProc, procPtr, TclProcDeleteProc);
 
     /*
diff --git a/tests/namespace.test b/tests/namespace.test
new file mode 100644
index 0000000..1d26512
--- /dev/null
+++ b/tests/namespace.test
@@ -0,0 +1,3338 @@
+# Functionality covered: this file contains a collection of tests for the
+# procedures in tclNamesp.c and tclEnsemble.c that implement Tcl's basic
+# support for namespaces.  Other namespace-related tests appear in
+# variable.test.
+#
+# Sourcing this file into Tcl runs the tests and generates output for errors.
+# No output means no errors were found.
+#
+# Copyright (c) 1997 Sun Microsystems, Inc.
+# Copyright (c) 1998-2000 by Scriptics Corporation.
+#
+# See the file "license.terms" for information on usage and redistribution of
+# this file, and for a DISCLAIMER OF ALL WARRANTIES.
+
+package require tcltest 2
+namespace import -force ::tcltest::*
+testConstraint memory [llength [info commands memory]]
+
+::tcltest::loadTestedCommands
+catch [list package require -exact Tcltest [info patchlevel]]
+
+#
+# REMARK: the tests for 'namespace upvar' are not done here. They are to be
+# found in the file 'upvar.test'.
+#
+
+# Clear out any namespaces called test_ns_*
+catch {namespace delete {*}[namespace children :: test_ns_*]}
+
+proc fq {ns} {
+    if {[string match ::* $ns]} {return $ns}
+    set current [uplevel 1 {namespace current}]
+    return [string trimright $current :]::[string trimleft $ns :]
+}
+
+test namespace-1.1 {TclInitNamespaces, GetNamespaceFromObj, NamespaceChildrenCmd} {
+    namespace children :: test_ns_*
+} {}
+
+catch {unset l}
+test namespace-2.1 {Tcl_GetCurrentNamespace} {
+    list [namespace current] [namespace eval {} {namespace current}] \
+        [namespace eval {} {namespace current}]
+} {:: :: ::}
+test namespace-2.2 {Tcl_GetCurrentNamespace} {
+    set l {}
+    lappend l [namespace current]
+    namespace eval test_ns_1 {
+        lappend l [namespace current]
+        namespace eval foo {
+            lappend l [namespace current]
+        }
+    }
+    lappend l [namespace current]
+} {:: ::test_ns_1 ::test_ns_1::foo ::}
+
+test namespace-3.1 {Tcl_GetGlobalNamespace} {
+    namespace eval test_ns_1 {namespace eval foo {namespace eval bar {} } }
+    # namespace children uses Tcl_GetGlobalNamespace 
+    namespace eval test_ns_1 {namespace children foo b*}
+} {::test_ns_1::foo::bar}
+
+test namespace-4.1 {Tcl_PushCallFrame with isProcCallFrame=1} {
+    namespace eval test_ns_1 {
+        variable v 123
+        proc p {} {
+            variable v
+            return $v
+        }
+    }
+    test_ns_1::p    ;# does Tcl_PushCallFrame to push p's namespace
+} {123}
+test namespace-4.2 {Tcl_PushCallFrame with isProcCallFrame=0} {
+    namespace eval test_ns_1::baz {}  ;# does Tcl_PushCallFrame to create baz
+    proc test_ns_1::baz::p {} {
+        variable v
+        set v 789
+        set v}
+    test_ns_1::baz::p
+} {789}
+
+test namespace-5.1 {Tcl_PopCallFrame, no vars} {
+    namespace eval test_ns_1::blodge {}  ;# pushes then pops frame
+} {}
+test namespace-5.2 {Tcl_PopCallFrame, local vars must be deleted} -setup {
+    namespace eval test_ns_1 {}
+} -body {
+    proc test_ns_1::r {} {
+        set a 123
+    }
+    test_ns_1::r   ;# pushes then pop's r's frame
+} -result {123}
+
+test namespace-6.1 {Tcl_CreateNamespace} {
+    catch {namespace delete {*}[namespace children :: test_ns_*]}
+    list [lsort [namespace children :: test_ns_*]] \
+        [namespace eval test_ns_1 {namespace current}] \
+	[namespace eval test_ns_2 {namespace current}] \
+	[namespace eval ::test_ns_3 {namespace current}] \
+	[namespace eval ::test_ns_4 \
+            {namespace eval foo {namespace current}}] \
+	[namespace eval ::test_ns_5 \
+            {namespace eval ::test_ns_6 {namespace current}}] \
+        [lsort [namespace children :: test_ns_*]]
+} {{} ::test_ns_1 ::test_ns_2 ::test_ns_3 ::test_ns_4::foo ::test_ns_6 {::test_ns_1 ::test_ns_2 ::test_ns_3 ::test_ns_4 ::test_ns_5 ::test_ns_6}}
+test namespace-6.2 {Tcl_CreateNamespace, odd number of :'s in name is okay} {
+    list [namespace eval :::test_ns_1::::foo {namespace current}] \
+         [namespace eval test_ns_2:::::foo {namespace current}]
+} {::test_ns_1::foo ::test_ns_2::foo}
+test namespace-6.3 {Tcl_CreateNamespace, trailing ::s in ns name are ignored} {
+    list [catch {namespace eval test_ns_7::: {namespace current}} msg] $msg 
+} {0 ::test_ns_7}
+test namespace-6.4 {Tcl_CreateNamespace, trailing ::s in ns name are ignored} {
+    catch {namespace delete {*}[namespace children :: test_ns_*]}
+    namespace eval test_ns_1:: {
+        namespace eval test_ns_2:: {}
+        namespace eval test_ns_3:: {}
+    }
+    lsort [namespace children ::test_ns_1]
+} [lsort {::test_ns_1::test_ns_2 ::test_ns_1::test_ns_3}]
+test namespace-6.5 {Tcl_CreateNamespace, relative ns names now only looked up in current ns} {
+    set trigger {
+        namespace eval test_ns_2 {namespace current}
+    }
+    set l {}
+    lappend l [namespace eval test_ns_1 $trigger]
+    namespace eval test_ns_1::test_ns_2 {}
+    lappend l [namespace eval test_ns_1 $trigger]
+} {::test_ns_1::test_ns_2 ::test_ns_1::test_ns_2}
+
+test namespace-7.1 {Tcl_DeleteNamespace, active call frames in ns} {
+    catch {namespace delete {*}[namespace children :: test_ns_*]}
+    namespace eval test_ns_1 {
+        proc p {} {
+            namespace delete [namespace current]
+            return [namespace current]
+        }
+    }
+    list [test_ns_1::p] [catch {test_ns_1::p} msg] $msg
+} {::test_ns_1 1 {invalid command name "test_ns_1::p"}}
+test namespace-7.2 {Tcl_DeleteNamespace, no active call frames in ns} {
+    namespace eval test_ns_2 {
+        proc p {} {
+            return [namespace current]
+        }
+    }
+    list [test_ns_2::p] [namespace delete test_ns_2]
+} {::test_ns_2 {}}
+test namespace-7.3 {recursive Tcl_DeleteNamespace, active call frames in ns} {
+    # [Bug 1355942]
+    namespace eval test_ns_2 {
+        set x 1
+	trace add variable x unset "namespace delete [namespace current];#"
+	namespace delete [namespace current]
+    }
+} {}
+test namespace-7.4 {recursive Tcl_DeleteNamespace, active call frames in ns} {
+    # [Bug 1355942]
+    namespace eval test_ns_2 {
+        proc x {} {}
+	trace add command x delete "namespace delete [namespace current];#"
+	namespace delete [namespace current]
+    }
+} {}
+test namespace-7.5 {recursive Tcl_DeleteNamespace, no active call frames in ns} {
+    # [Bug 1355942]
+    namespace eval test_ns_2 {
+        set x 1
+	trace add variable x unset "namespace delete [namespace current];#"
+    }
+    namespace delete test_ns_2
+} {}
+test namespace-7.6 {recursive Tcl_DeleteNamespace, no active call frames in ns} {
+    # [Bug 1355942]
+    namespace eval test_ns_2 {
+        proc x {} {}
+	trace add command x delete "namespace delete [namespace current];#"
+    }
+    namespace delete test_ns_2
+} {}
+test namespace-7.7 {Bug 1655305} -setup {
+    interp create slave
+    # Can't invoke through the ensemble, since deleting the global namespace
+    # (indirectly, via deleting ::tcl) deletes the ensemble.
+    slave eval {rename ::tcl::info::commands ::infocommands}
+    slave hide infocommands
+    slave eval {
+	proc foo {} {
+	    namespace delete ::
+	}
+    }
+} -body {
+    slave eval foo
+    slave invokehidden infocommands
+} -cleanup {
+    interp delete slave
+} -result {}
+
+test namespace-7.8 {Bug ba1419303b4c} -setup {
+    namespace eval ns1 {
+	namespace ensemble create
+    }
+
+    trace add command ns1 delete {
+	namespace delete ns1
+    }
+} -body {
+    # No segmentation fault given --enable-symbols=mem. 
+    namespace delete ns1
+} -result {}
+
+test namespace-8.1 {TclTeardownNamespace, delete global namespace} {
+    catch {interp delete test_interp}
+    interp create test_interp
+    interp eval test_interp {
+        namespace eval test_ns_1 {
+            namespace export p
+            proc p {} {
+                return [namespace current]
+            }
+        }
+        namespace eval test_ns_2 {
+            namespace import ::test_ns_1::p
+            variable v 27
+            proc q {} {
+                variable v
+                return "[p] $v"
+            }
+        }
+        set x [test_ns_2::q]
+        catch {set xxxx}
+    }
+    list [interp eval test_interp {test_ns_2::q}] \
+         [interp eval test_interp {namespace delete ::}] \
+         [catch {interp eval test_interp {set a 123}} msg] $msg \
+         [interp delete test_interp]
+} {{::test_ns_1 27} {} 1 {invalid command name "set"} {}}
+test namespace-8.2 {TclTeardownNamespace, remove deleted ns from parent} {
+    catch {namespace delete {*}[namespace children :: test_ns_*]}
+    namespace eval test_ns_1::test_ns_2::test_ns_3a {proc p {} {}}
+    namespace eval test_ns_1::test_ns_2::test_ns_3b {proc q {} {}}
+    list [namespace children test_ns_1] \
+         [namespace delete test_ns_1::test_ns_2] \
+         [namespace children test_ns_1]
+} {::test_ns_1::test_ns_2 {} {}}
+test namespace-8.3 {TclTeardownNamespace, delete child namespaces} {
+    catch {namespace delete {*}[namespace children :: test_ns_*]}
+    namespace eval test_ns_1::test_ns_2::test_ns_3a {proc p {} {}}
+    namespace eval test_ns_1::test_ns_2::test_ns_3b {proc q {} {}}
+    list [namespace children test_ns_1] \
+         [namespace delete test_ns_1::test_ns_2] \
+         [namespace children test_ns_1] \
+         [catch {namespace children test_ns_1::test_ns_2} msg] $msg \
+         [info commands test_ns_1::test_ns_2::test_ns_3a::*]
+} {::test_ns_1::test_ns_2 {} {} 1 {namespace "test_ns_1::test_ns_2" not found in "::"} {}}
+test namespace-8.4 {TclTeardownNamespace, cmds imported from deleted ns go away} {
+    catch {namespace delete {*}[namespace children :: test_ns_*]}
+    namespace eval test_ns_export {
+        namespace export cmd1 cmd2
+        proc cmd1 {args} {return "cmd1: $args"}
+        proc cmd2 {args} {return "cmd2: $args"}
+    }
+    namespace eval test_ns_import {
+        namespace import ::test_ns_export::*
+        proc p {} {return foo}
+    }
+    list [lsort [info commands test_ns_import::*]] \
+         [namespace delete test_ns_export] \
+         [info commands test_ns_import::*]
+} [list [lsort {::test_ns_import::p ::test_ns_import::cmd1 ::test_ns_import::cmd2}] {} ::test_ns_import::p]
+test namespace-8.5 {TclTeardownNamespace: preserve errorInfo; errorCode values} {
+    interp create slave
+    slave eval {trace add execution error leave {namespace delete :: ;#}}
+    catch {slave eval error foo bar baz}
+    interp delete slave
+    set ::errorInfo
+} {bar
+    invoked from within
+"slave eval error foo bar baz"}
+test namespace-8.6 {TclTeardownNamespace: preserve errorInfo; errorCode values} {
+    interp create slave 
+    slave eval {trace add variable errorCode write {namespace delete :: ;#}}
+    catch {slave eval error foo bar baz}
+    interp delete slave
+    set ::errorInfo
+} {bar
+    invoked from within
+"slave eval error foo bar baz"}
+test namespace-8.7 {TclTeardownNamespace: preserve errorInfo; errorCode values} {
+    interp create slave
+    slave eval {trace add execution error leave {namespace delete :: ;#}}
+    catch {slave eval error foo bar baz}
+    interp delete slave
+    set ::errorCode
+} baz
+
+test namespace-9.1 {Tcl_Import, empty import pattern} {
+    catch {namespace delete {*}[namespace children :: test_ns_*]}
+    list [catch {namespace eval test_ns_import {namespace import {}}} msg] $msg
+} {1 {empty import pattern}}
+test namespace-9.2 {Tcl_Import, unknown namespace in import pattern} {
+    list [catch {namespace eval test_ns_import {namespace import fred::x}} msg] $msg
+} {1 {unknown namespace in import pattern "fred::x"}}
+test namespace-9.3 {Tcl_Import, import ns == export ns} {
+    list [catch {namespace eval test_ns_import {namespace import ::test_ns_import::puts}} msg] $msg
+} {1 {import pattern "::test_ns_import::puts" tries to import from namespace "test_ns_import" into itself}}
+test namespace-9.4 {Tcl_Import, simple import} {
+    catch {namespace delete {*}[namespace children :: test_ns_*]}
+    namespace eval test_ns_export {
+        namespace export cmd1
+        proc cmd1 {args} {return "cmd1: $args"}
+        proc cmd2 {args} {return "cmd2: $args"}
+    }
+    namespace eval test_ns_import {
+        namespace import ::test_ns_export::*
+        proc p {} {return [cmd1 123]}
+    }
+    test_ns_import::p
+} {cmd1: 123}
+test namespace-9.5 {Tcl_Import, RFE 1230597} -setup {
+    namespace eval test_ns_import {}
+    namespace eval test_ns_export {}
+} -body {
+    list [catch {namespace eval test_ns_import {namespace import ::test_ns_export::*}} msg] $msg
+} -result {0 {}}
+test namespace-9.6 {Tcl_Import, cmd redefinition ok if allowOverwrite!=0} -setup {
+    namespace eval test_ns_import {}
+    namespace eval ::test_ns_export {
+        proc cmd1 {args} {return "cmd1: $args"}
+	namespace export cmd1
+    }
+} -body {
+    namespace eval test_ns_import {
+        namespace import -force ::test_ns_export::*
+        cmd1 555
+    }
+} -result {cmd1: 555}
+test namespace-9.7 {Tcl_Import, links are preserved if cmd is redefined} {
+    catch {namespace delete {*}[namespace children :: test_ns_*]}
+    namespace eval test_ns_export {
+        namespace export cmd1
+        proc cmd1 {args} {return "cmd1: $args"}
+    }
+    namespace eval test_ns_import {
+        namespace import -force ::test_ns_export::*
+    }
+    list [test_ns_import::cmd1 a b c] \
+         [test_ns_export::cmd1 d e f] \
+         [proc test_ns_export::cmd1 {args} {return "new1: $args"}] \
+         [namespace origin test_ns_import::cmd1] \
+         [namespace origin test_ns_export::cmd1] \
+         [test_ns_import::cmd1 g h i] \
+         [test_ns_export::cmd1 j k l]
+} {{cmd1: a b c} {cmd1: d e f} {} ::test_ns_export::cmd1 ::test_ns_export::cmd1 {new1: g h i} {new1: j k l}}
+test namespace-9.8 {Tcl_Import: Bug 1017299} -setup {
+    namespace eval one {
+	namespace export cmd
+	proc cmd {} {}
+    }
+    namespace eval two {
+	namespace export cmd
+	proc other args {}
+    }
+    namespace eval two \
+	    [list namespace import [namespace current]::one::cmd]
+    namespace eval three \
+	    [list namespace import [namespace current]::two::cmd]
+    namespace eval three {
+	rename cmd other
+	namespace export other
+    }
+} -body {
+    namespace eval two [list namespace import -force \
+	    [namespace current]::three::other]
+    namespace origin two::other
+} -cleanup {
+    namespace delete one two three
+} -match glob -result *::one::cmd
+test namespace-9.9 {Tcl_Import: Bug 1017299} -setup {
+    namespace eval one {
+	namespace export cmd
+	proc cmd {} {}
+    }
+    namespace eval two namespace export cmd
+    namespace eval two \
+	    [list namespace import [namespace current]::one::cmd]
+    namespace eval three namespace export cmd
+    namespace eval three \
+	    [list namespace import [namespace current]::two::cmd]
+} -body {
+    namespace eval two [list namespace import -force \
+	    [namespace current]::three::cmd]
+    namespace origin two::cmd
+} -cleanup {
+    namespace delete one two three
+} -returnCodes error -match glob -result {import pattern * would create a loop*}
+
+test namespace-10.1 {Tcl_ForgetImport, check for valid namespaces} {
+    catch {namespace delete {*}[namespace children :: test_ns_*]}
+    list [catch {namespace forget xyzzy::*} msg] $msg
+} {1 {unknown namespace in namespace forget pattern "xyzzy::*"}}
+test namespace-10.2 {Tcl_ForgetImport, ignores patterns that don't match} {
+    namespace eval test_ns_export {
+        namespace export cmd1
+        proc cmd1 {args} {return "cmd1: $args"}
+        proc cmd2 {args} {return "cmd2: $args"}
+    }
+    namespace eval test_ns_import {
+        namespace forget ::test_ns_export::wombat
+    }
+} {}
+test namespace-10.3 {Tcl_ForgetImport, deletes matching imported cmds} -setup {
+    namespace eval test_ns_export {
+        namespace export cmd1
+        proc cmd1 {args} {return "cmd1: $args"}
+        proc cmd2 {args} {return "cmd2: $args"}
+    }
+} -body {
+    namespace eval test_ns_import {
+        namespace import ::test_ns_export::*
+        proc p {} {return [cmd1 123]}
+        set l {}
+        lappend l [lsort [info commands ::test_ns_import::*]]
+        namespace forget ::test_ns_export::cmd1
+        lappend l [info commands ::test_ns_import::*]
+        lappend l [catch {cmd1 777} msg] $msg
+    }
+} -result [list [lsort {::test_ns_import::p ::test_ns_import::cmd1}] ::test_ns_import::p 1 {invalid command name "cmd1"}]
+test namespace-10.4 {Tcl_ForgetImport: Bug 560297} -setup {
+    namespace eval origin {
+	namespace export cmd
+	proc cmd {} {}
+    }
+    namespace eval unrelated {
+	proc cmd {} {}
+    }
+    namespace eval my \
+	    [list namespace import [namespace current]::origin::cmd]
+} -body {
+    namespace eval my \
+	    [list namespace forget [namespace current]::unrelated::cmd]
+    my::cmd
+} -cleanup {
+    namespace delete origin unrelated my
+}
+test namespace-10.5 {Tcl_ForgetImport: Bug 560297} -setup {
+    namespace eval origin {
+	namespace export cmd
+	proc cmd {} {}
+    }
+    namespace eval my \
+	    [list namespace import [namespace current]::origin::cmd]
+    namespace eval my rename cmd newname
+} -body {
+    namespace eval my \
+	    [list namespace forget [namespace current]::origin::cmd]
+    my::newname
+} -cleanup {
+    namespace delete origin my
+} -returnCodes error -match glob -result *
+test namespace-10.6 {Tcl_ForgetImport: Bug 560297} -setup {
+    namespace eval origin {
+	namespace export cmd
+	proc cmd {} {}
+    }
+    namespace eval my \
+	    [list namespace import [namespace current]::origin::cmd]
+    namespace eval your {}
+    namespace eval my \
+	    [list rename cmd [namespace current]::your::newname]
+} -body {
+    namespace eval your namespace forget newname
+    your::newname
+} -cleanup {
+    namespace delete origin my your
+} -returnCodes error -match glob -result *
+test namespace-10.7 {Tcl_ForgetImport: Bug 560297} -setup {
+    namespace eval origin {
+	namespace export cmd
+	proc cmd {} {}
+    }
+    namespace eval link namespace export cmd
+    namespace eval link \
+	    [list namespace import [namespace current]::origin::cmd]
+    namespace eval link2 namespace export cmd
+    namespace eval link2 \
+	    [list namespace import [namespace current]::link::cmd]
+    namespace eval my \
+	    [list namespace import [namespace current]::link2::cmd]
+} -body {
+    namespace eval my \
+	    [list namespace forget [namespace current]::origin::cmd]
+    my::cmd
+} -cleanup {
+    namespace delete origin link link2 my
+} -returnCodes error -match glob -result *
+test namespace-10.8 {Tcl_ForgetImport: Bug 560297} -setup {
+    namespace eval origin {
+	namespace export cmd
+	proc cmd {} {}
+    }
+    namespace eval link namespace export cmd
+    namespace eval link \
+	    [list namespace import [namespace current]::origin::cmd]
+    namespace eval link2 namespace export cmd
+    namespace eval link2 \
+	    [list namespace import [namespace current]::link::cmd]
+    namespace eval my \
+	    [list namespace import [namespace current]::link2::cmd]
+} -body {
+    namespace eval my \
+	    [list namespace forget [namespace current]::link::cmd]
+    my::cmd
+} -cleanup {
+    namespace delete origin link link2 my
+}
+test namespace-10.9 {Tcl_ForgetImport: Bug 560297} -setup {
+    namespace eval origin {
+	namespace export cmd
+	proc cmd {} {}
+    }
+    namespace eval link namespace export cmd
+    namespace eval link \
+	    [list namespace import [namespace current]::origin::cmd]
+    namespace eval link2 namespace export cmd
+    namespace eval link2 \
+	    [list namespace import [namespace current]::link::cmd]
+    namespace eval my \
+	    [list namespace import [namespace current]::link2::cmd]
+} -body {
+    namespace eval my \
+	    [list namespace forget [namespace current]::link2::cmd]
+    my::cmd
+} -cleanup {
+    namespace delete origin link link2 my
+} -returnCodes error -match glob -result *
+
+test namespace-11.1 {TclGetOriginalCommand, check if not imported cmd} -setup {
+    catch {namespace delete {*}[namespace children :: test_ns_*]}
+} -body {
+    namespace eval test_ns_export {
+        namespace export cmd1
+        proc cmd1 {args} {return "cmd1: $args"}
+    }
+    list [namespace origin set] [namespace origin test_ns_export::cmd1]
+} -result {::set ::test_ns_export::cmd1}
+test namespace-11.2 {TclGetOriginalCommand, directly imported cmd} -setup {
+    catch {namespace delete {*}[namespace children :: test_ns_*]}
+    namespace eval test_ns_export {
+        namespace export cmd1
+        proc cmd1 {args} {return "cmd1: $args"}
+    }
+} -body {
+    namespace eval test_ns_import1 {
+        namespace import ::test_ns_export::*
+        namespace export *
+        proc p {} {namespace origin cmd1}
+    }
+    list [test_ns_import1::p] [namespace origin test_ns_import1::cmd1]
+} -result {::test_ns_export::cmd1 ::test_ns_export::cmd1}
+test namespace-11.3 {TclGetOriginalCommand, indirectly imported cmd} -setup {
+    catch {namespace delete {*}[namespace children :: test_ns_*]}
+    namespace eval test_ns_export {
+        namespace export cmd1
+        proc cmd1 {args} {return "cmd1: $args"}
+    }
+    namespace eval test_ns_import1 {
+        namespace import ::test_ns_export::*
+        namespace export *
+        proc p {} {namespace origin cmd1}
+    }
+} -body {
+    namespace eval test_ns_import2 {
+        namespace import ::test_ns_import1::*
+        proc q {} {return [cmd1 123]}
+    }
+    list [test_ns_import2::q] [namespace origin test_ns_import2::cmd1]
+} -result {{cmd1: 123} ::test_ns_export::cmd1}
+
+test namespace-12.1 {InvokeImportedCmd} {
+    catch {namespace delete {*}[namespace children :: test_ns_*]}
+    namespace eval test_ns_export {
+        namespace export cmd1
+        proc cmd1 {args} {namespace current}
+    }
+    namespace eval test_ns_import {
+        namespace import ::test_ns_export::*
+    }
+    list [test_ns_import::cmd1]
+} {::test_ns_export}
+
+test namespace-13.1 {DeleteImportedCmd, deletes imported cmds} -setup {
+    catch {namespace delete {*}[namespace children :: test_ns_*]}
+    namespace eval test_ns_export {
+        namespace export cmd1
+        proc cmd1 {args} {namespace current}
+    }
+    namespace eval test_ns_import {
+        namespace import ::test_ns_export::*
+    }
+} -body {
+    namespace eval test_ns_import {
+        set l {}
+        lappend l [info commands ::test_ns_import::*]
+        namespace forget ::test_ns_export::cmd1
+        lappend l [info commands ::test_ns_import::*]
+    }
+} -result {::test_ns_import::cmd1 {}}
+test namespace-13.2 {DeleteImportedCmd, Bug a4494e28ed} {
+    # Will panic if still buggy
+    namespace eval src {namespace export foo; proc foo {} {}}
+    namespace eval dst {namespace import [namespace parent]::src::foo}
+    trace add command src::foo delete \
+        "[list namespace delete [namespace current]::dst] ;#"
+    proc src::foo {} {}
+    namespace delete src
+} {}
+
+test namespace-14.1 {TclGetNamespaceForQualName, absolute names} -setup {
+    catch {namespace delete {*}[namespace children :: test_ns_*]}
+    variable v 10
+    namespace eval test_ns_1::test_ns_2 {
+        variable v 20
+    }
+    namespace eval test_ns_2 {
+        variable v 30
+    }
+} -body {
+    namespace eval test_ns_1 {
+        list $::v $::test_ns_2::v $::test_ns_1::test_ns_2::v \
+		[lsort [namespace children :: test_ns_*]]
+    }
+} -result [list 10 30 20 [lsort {::test_ns_1 ::test_ns_2}]]
+test namespace-14.2 {TclGetNamespaceForQualName, invalid absolute names} -setup {
+    catch {namespace delete {*}[namespace children :: test_ns_*]}
+    variable v 10
+    namespace eval test_ns_1::test_ns_2 {
+        variable v 20
+    }
+    namespace eval test_ns_2 {
+        variable v 30
+    }
+} -body {
+    namespace eval test_ns_1 {
+        list [catch {set ::test_ns_777::v} msg] $msg \
+             [catch {namespace children test_ns_777} msg] $msg
+    }
+} -result {1 {can't read "::test_ns_777::v": no such variable} 1 {namespace "test_ns_777" not found in "::test_ns_1"}}
+test namespace-14.3 {TclGetNamespaceForQualName, relative names} -setup {
+    catch {namespace delete {*}[namespace children :: test_ns_*]}
+    variable v 10
+    namespace eval test_ns_1::test_ns_2 {
+        variable v 20
+    }
+    namespace eval test_ns_2 {
+        variable v 30
+    }
+} -body {
+    namespace eval test_ns_1 {
+        list $v $test_ns_2::v
+    }
+} -result {10 20}
+test namespace-14.4 {TclGetNamespaceForQualName, relative ns names looked up only in current ns} {
+    namespace eval test_ns_1::test_ns_2 {
+        namespace eval foo {}
+    }
+    namespace eval test_ns_1 {
+        list [namespace children test_ns_2] \
+             [catch {namespace children test_ns_1} msg] $msg
+    }
+} {::test_ns_1::test_ns_2::foo 1 {namespace "test_ns_1" not found in "::test_ns_1"}}
+test namespace-14.5 {TclGetNamespaceForQualName, relative ns names looked up only in current ns} {
+    namespace eval ::test_ns_2 {
+        namespace eval bar {}
+    }
+    namespace eval test_ns_1 {
+        list [catch {namespace delete test_ns_2::bar} msg] $msg
+    }
+} {1 {unknown namespace "test_ns_2::bar" in namespace delete command}}
+test namespace-14.6 {TclGetNamespaceForQualName, relative ns names looked up only in current ns} {
+    namespace eval test_ns_1::test_ns_2 {
+        namespace eval foo {}
+    }
+    namespace eval test_ns_1 {
+        list [namespace children test_ns_2] \
+             [catch {namespace children test_ns_1} msg] $msg
+    }
+} {::test_ns_1::test_ns_2::foo 1 {namespace "test_ns_1" not found in "::test_ns_1"}}
+test namespace-14.7 {TclGetNamespaceForQualName, ignore extra :s if ns} -setup {
+    namespace eval test_ns_1::test_ns_2::foo {}
+} -body {
+    namespace children test_ns_1:::
+} -result {::test_ns_1::test_ns_2}
+test namespace-14.8 {TclGetNamespaceForQualName, ignore extra :s if ns} -setup {
+    namespace eval test_ns_1::test_ns_2::foo {}
+} -body {
+    namespace children :::test_ns_1:::::test_ns_2:::
+} -result {::test_ns_1::test_ns_2::foo}
+test namespace-14.9 {TclGetNamespaceForQualName, extra ::s are significant for vars} {
+    set l {}
+    lappend l [catch {set test_ns_1::test_ns_2::} msg] $msg
+    namespace eval test_ns_1::test_ns_2 {variable {} 2525}
+    lappend l [set test_ns_1::test_ns_2::]
+} {1 {can't read "test_ns_1::test_ns_2::": no such variable} 2525}
+test namespace-14.10 {TclGetNamespaceForQualName, extra ::s are significant for vars} -setup {
+    namespace eval test_ns_1::test_ns_2::foo {}
+    unset -nocomplain test_ns_1::test_ns_2::
+    set l {}
+} -body {
+    lappend l [catch {set test_ns_1::test_ns_2::} msg] $msg
+    set test_ns_1::test_ns_2:: 314159
+    lappend l [set test_ns_1::test_ns_2::]
+} -result {1 {can't read "test_ns_1::test_ns_2::": no such variable} 314159}
+test namespace-14.11 {TclGetNamespaceForQualName, extra ::s are significant for commands} -setup {
+    namespace eval test_ns_1::test_ns_2::foo {}
+    catch {rename test_ns_1::test_ns_2:: {}}
+    set l {}
+} -body {
+    lappend l [catch {test_ns_1::test_ns_2:: hello} msg] $msg
+    proc test_ns_1::test_ns_2:: {args} {return "\{\}: $args"}
+    lappend l [test_ns_1::test_ns_2:: hello]
+} -result {1 {invalid command name "test_ns_1::test_ns_2::"} {{}: hello}}
+test namespace-14.12 {TclGetNamespaceForQualName, extra ::s are significant for vars} -setup {
+    catch {namespace delete {*}[namespace children :: test_ns_*]}
+} -body {
+    namespace eval test_ns_1 {
+        variable {}
+        set test_ns_1::(x) y
+    }
+    set test_ns_1::(x)
+} -result y
+test namespace-14.13 {TclGetNamespaceForQualName, namespace other than global ns can't have empty name} -setup {
+    catch {namespace delete {*}[namespace children :: test_ns_*]}
+} -returnCodes error -body {
+    namespace eval test_ns_1 {
+	proc {} {} {}
+	namespace eval {} {}
+	{}
+    }
+} -result {can't create namespace "": only global namespace can have empty name}
+
+test namespace-15.1 {Tcl_FindNamespace, absolute name found} -setup {
+    catch {namespace delete {*}[namespace children :: test_ns_*]}
+} -body {
+    namespace eval test_ns_delete {
+        namespace eval test_ns_delete2 {}
+        proc cmd {args} {namespace current}
+    }
+    list [namespace delete ::test_ns_delete::test_ns_delete2] \
+         [namespace children ::test_ns_delete]
+} -result {{} {}}
+test namespace-15.2 {Tcl_FindNamespace, absolute name not found} -body {
+    namespace delete ::test_ns_delete::test_ns_delete2
+} -returnCodes error -result {unknown namespace "::test_ns_delete::test_ns_delete2" in namespace delete command}
+test namespace-15.3 {Tcl_FindNamespace, relative name found} {
+    namespace eval test_ns_delete {
+        namespace eval test_ns_delete2 {}
+        namespace eval test_ns_delete3 {}
+        list [namespace delete test_ns_delete2] \
+             [namespace children [namespace current]]
+    }
+} {{} ::test_ns_delete::test_ns_delete3}
+test namespace-15.4 {Tcl_FindNamespace, relative name not found} {
+    namespace eval test_ns_delete2 {}
+    namespace eval test_ns_delete {
+        list [catch {namespace delete test_ns_delete2} msg] $msg
+    }
+} {1 {unknown namespace "test_ns_delete2" in namespace delete command}}
+
+test namespace-16.1 {Tcl_FindCommand, absolute name found} -setup {
+    catch {namespace delete {*}[namespace children :: test_ns_*]}
+} -body {
+    namespace eval test_ns_1 {
+        proc cmd {args} {return "[namespace current]::cmd: $args"}
+        variable v "::test_ns_1::cmd"
+        eval $v one
+    }
+} -result {::test_ns_1::cmd: one}
+test namespace-16.2 {Tcl_FindCommand, absolute name found} -setup {
+    catch {namespace delete {*}[namespace children :: test_ns_*]}
+    namespace eval test_ns_1 {
+        proc cmd {args} {return "[namespace current]::cmd: $args"}
+        variable v "::test_ns_1::cmd"
+    }
+} -body {
+    eval $test_ns_1::v two
+} -result {::test_ns_1::cmd: two}
+test namespace-16.3 {Tcl_FindCommand, absolute name not found} {
+    namespace eval test_ns_1 {
+        variable v2 "::test_ns_1::ladidah"
+        list [catch {eval $v2} msg] $msg
+    }
+} {1 {invalid command name "::test_ns_1::ladidah"}}
+
+# save the "unknown" proc, which is redefined by the following two tests
+catch {rename unknown unknown.old}
+proc unknown {args} {
+    return "unknown: $args"
+}
+test namespace-16.4 {Tcl_FindCommand, absolute name and TCL_GLOBAL_ONLY} {
+    ::test_ns_1::foobar x y z
+} {unknown: ::test_ns_1::foobar x y z}
+test namespace-16.5 {Tcl_FindCommand, absolute name and TCL_GLOBAL_ONLY} {
+    ::foobar 1 2 3 4 5
+} {unknown: ::foobar 1 2 3 4 5}
+test namespace-16.6 {Tcl_FindCommand, relative name and TCL_GLOBAL_ONLY} {
+    test_ns_1::foobar x y z
+} {unknown: test_ns_1::foobar x y z}
+test namespace-16.7 {Tcl_FindCommand, relative name and TCL_GLOBAL_ONLY} {
+    foobar 1 2 3 4 5
+} {unknown: foobar 1 2 3 4 5}
+# restore the "unknown" proc saved previously
+catch {rename unknown {}}
+catch {rename unknown.old unknown}
+
+test namespace-16.8 {Tcl_FindCommand, relative name found} -setup {
+    catch {namespace delete {*}[namespace children :: test_ns_*]}
+    namespace eval test_ns_1 {
+        proc cmd {args} {return "[namespace current]::cmd: $args"}
+    }
+} -body {
+    namespace eval test_ns_1 {
+        cmd a b c
+    }
+} -result {::test_ns_1::cmd: a b c}
+test namespace-16.9 {Tcl_FindCommand, relative name found} -body {
+    proc cmd2 {args} {return "[namespace current]::cmd2: $args"}
+    namespace eval test_ns_1 {
+       cmd2 a b c
+    }
+} -cleanup {
+    catch {rename cmd2 {}}
+} -result {::::cmd2: a b c}
+test namespace-16.10 {Tcl_FindCommand, relative name found, only look in current then global ns} -body {
+    proc cmd2 {args} {return "[namespace current]::cmd2: $args"}
+    namespace eval test_ns_1 {
+        proc cmd2 {args} {
+            return "[namespace current]::cmd2 in test_ns_1: $args"
+        }
+        namespace eval test_ns_12 {
+            cmd2 a b c
+        }
+    }
+} -cleanup {
+    catch {rename cmd2 {}}
+} -result {::::cmd2: a b c}
+test namespace-16.11 {Tcl_FindCommand, relative name not found} -body {
+    namespace eval test_ns_1 {
+       cmd3 a b c
+    }
+} -returnCodes error -result {invalid command name "cmd3"}
+
+unset -nocomplain x
+test namespace-17.1 {Tcl_FindNamespaceVar, absolute name found} -setup {
+    catch {namespace delete {*}[namespace children :: test_ns_*]}
+} -body {
+    set x 314159
+    namespace eval test_ns_1 {
+        set ::x
+    }
+} -result {314159}
+variable ::x 314159
+test namespace-17.2 {Tcl_FindNamespaceVar, absolute name found} {
+    namespace eval test_ns_1 {
+        variable x 777
+        set ::test_ns_1::x
+    }
+} {777}
+test namespace-17.3 {Tcl_FindNamespaceVar, absolute name found} {
+    namespace eval test_ns_1 {
+        namespace eval test_ns_2 {
+            variable x 1111
+        }
+        set ::test_ns_1::test_ns_2::x
+    }
+} {1111}
+test namespace-17.4 {Tcl_FindNamespaceVar, absolute name not found} -body {
+    namespace eval test_ns_1 {
+        namespace eval test_ns_2 {
+            variable x 1111
+        }
+        set ::test_ns_1::test_ns_2::y
+    }
+} -returnCodes error -result {can't read "::test_ns_1::test_ns_2::y": no such variable}
+test namespace-17.5 {Tcl_FindNamespaceVar, absolute name and TCL_GLOBAL_ONLY} -setup {
+    namespace eval ::test_ns_1::test_ns_2 {}
+} -body {
+    namespace eval test_ns_1 {
+        namespace eval test_ns_3 {
+            variable ::test_ns_1::test_ns_2::x 2222
+        }
+    }
+    set ::test_ns_1::test_ns_2::x
+} -result {2222}
+test namespace-17.6 {Tcl_FindNamespaceVar, relative name found} -setup {
+    namespace eval test_ns_1 {
+        variable x 777
+    }
+} -body {
+    namespace eval test_ns_1 {
+        set x
+    }
+} -result {777}
+test namespace-17.7 {Tcl_FindNamespaceVar, relative name found} {
+    namespace eval test_ns_1 {
+	variable x 777
+        unset x
+        set x  ;# must be global x now
+    }
+} {314159}
+test namespace-17.8 {Tcl_FindNamespaceVar, relative name not found} -body {
+    namespace eval test_ns_1 {
+        set wuzzat
+    }
+} -returnCodes error -result {can't read "wuzzat": no such variable}
+test namespace-17.9 {Tcl_FindNamespaceVar, relative name and TCL_GLOBAL_ONLY} {
+    namespace eval test_ns_1 {
+        variable a hello
+    }
+    set test_ns_1::a
+} {hello}
+test namespace-17.10 {Tcl_FindNamespaceVar, interference with cached varNames} -setup {
+    namespace eval test_ns_1 {}
+} -body {
+    proc test_ns {} {
+	set ::test_ns_1::a 0
+    }
+    test_ns
+    rename test_ns {}
+    namespace eval test_ns_1 unset a
+    set a 0
+    namespace eval test_ns_1 set a 1
+    namespace delete test_ns_1
+    return $a
+} -result 1
+catch {unset a}
+catch {unset x}
+
+catch {unset l}
+catch {rename foo {}}
+test namespace-18.1 {TclResetShadowedCmdRefs, one-level check for command shadowing} -setup {
+    catch {namespace delete {*}[namespace children :: test_ns_*]}
+} -body {
+    proc foo {} {return "global foo"}
+    namespace eval test_ns_1 {
+        proc trigger {} {
+            return [foo]
+        }
+    }
+    set l ""
+    lappend l [test_ns_1::trigger]
+    namespace eval test_ns_1 {
+        # force invalidation of cached ref to "foo" in proc trigger
+        proc foo {} {return "foo in test_ns_1"}
+    }
+    lappend l [test_ns_1::trigger]
+} -result {{global foo} {foo in test_ns_1}}
+test namespace-18.2 {TclResetShadowedCmdRefs, multilevel check for command shadowing} {
+    namespace eval test_ns_2 {
+        proc foo {} {return "foo in ::test_ns_2"}
+    }
+    namespace eval test_ns_1 {
+        namespace eval test_ns_2 {}
+        proc trigger {} {
+            return [test_ns_2::foo]
+        }
+    }
+    set l ""
+    lappend l [test_ns_1::trigger]
+    namespace eval test_ns_1 {
+        namespace eval test_ns_2 {
+            # force invalidation of cached ref to "foo" in proc trigger
+            proc foo {} {return "foo in ::test_ns_1::test_ns_2"}
+        }
+    }
+    lappend l [test_ns_1::trigger]
+} {{foo in ::test_ns_2} {foo in ::test_ns_1::test_ns_2}}
+catch {unset l}
+catch {rename foo {}}
+
+test namespace-19.1 {GetNamespaceFromObj, global name found} -setup {
+    catch {namespace delete {*}[namespace children :: test_ns_*]}
+} -body {
+    namespace eval test_ns_1::test_ns_2 {}
+    namespace children ::test_ns_1
+} -result {::test_ns_1::test_ns_2}
+test namespace-19.2 {GetNamespaceFromObj, relative name found} -setup {
+    catch {namespace delete {*}[namespace children :: test_ns_*]}
+    namespace eval test_ns_1::test_ns_2 {}
+} -body {
+    namespace eval test_ns_1 {
+        namespace children test_ns_2
+    }
+} -result {}
+test namespace-19.3 {GetNamespaceFromObj, name not found} -setup {
+    catch {namespace delete {*}[namespace children :: test_ns_*]}
+} -body {
+    namespace eval test_ns_1 {
+        namespace children test_ns_99
+    }
+} -returnCodes error -result {namespace "test_ns_99" not found in "::test_ns_1"}
+test namespace-19.4 {GetNamespaceFromObj, invalidation of cached ns refs} -setup {
+    catch {namespace delete {*}[namespace children :: test_ns_*]}
+    namespace eval test_ns_1::test_ns_2 {}
+} -body {
+    namespace eval test_ns_1 {
+        proc foo {} {
+            return [namespace children test_ns_2]
+        }
+        list [catch {namespace children test_ns_99} msg] $msg
+    }
+    set l {}
+    lappend l [test_ns_1::foo]
+    namespace delete test_ns_1::test_ns_2
+    namespace eval test_ns_1::test_ns_2::test_ns_3 {}
+    lappend l [test_ns_1::foo]
+} -result {{} ::test_ns_1::test_ns_2::test_ns_3}
+
+test namespace-20.1 {Tcl_NamespaceObjCmd, bad subcommand} {
+    catch {namespace delete {*}[namespace children :: test_ns_*]}
+    list [catch {namespace} msg] $msg
+} {1 {wrong # args: should be "namespace subcommand ?arg ...?"}}
+test namespace-20.2 {Tcl_NamespaceObjCmd, bad subcommand} -body {
+    namespace wombat {}
+} -returnCodes error -match glob -result {unknown or ambiguous subcommand "wombat": must be *}
+test namespace-20.3 {Tcl_NamespaceObjCmd, abbreviations are okay} {
+    namespace ch :: test_ns_*
+} {}
+
+test namespace-21.1 {NamespaceChildrenCmd, no args} -setup {
+    catch {namespace delete {*}[namespace children :: test_ns_*]}
+} -body {
+    namespace eval test_ns_1::test_ns_2 {}
+    expr {"::test_ns_1" in [namespace children]}
+} -result {1}
+test namespace-21.2 {NamespaceChildrenCmd, no args} -setup {
+    catch {namespace delete {*}[namespace children :: test_ns_*]}
+    namespace eval test_ns_1::test_ns_2 {}
+} -body {
+    namespace eval test_ns_1 {
+        namespace children
+    }
+} -result {::test_ns_1::test_ns_2}
+test namespace-21.3 {NamespaceChildrenCmd, ns name given} -setup {
+    catch {namespace delete {*}[namespace children :: test_ns_*]}
+    namespace eval test_ns_1::test_ns_2 {}
+} -body {
+    namespace children ::test_ns_1
+} -result {::test_ns_1::test_ns_2}
+test namespace-21.4 {NamespaceChildrenCmd, ns name given} -setup {
+    catch {namespace delete {*}[namespace children :: test_ns_*]}
+    namespace eval test_ns_1::test_ns_2 {}
+} -body {
+    namespace eval test_ns_1 {
+        namespace children test_ns_2
+    }
+} -result {}
+test namespace-21.5 {NamespaceChildrenCmd, too many args} {
+    namespace eval test_ns_1 {
+        list [catch {namespace children test_ns_2 xxx yyy} msg] $msg
+    }
+} {1 {wrong # args: should be "namespace children ?name? ?pattern?"}}
+test namespace-21.6 {NamespaceChildrenCmd, glob-style pattern given} {
+    namespace eval test_ns_1::test_ns_foo {}
+    namespace children test_ns_1 *f*
+} {::test_ns_1::test_ns_foo}
+test namespace-21.7 {NamespaceChildrenCmd, glob-style pattern given} -setup {
+    catch {namespace delete {*}[namespace children :: test_ns_*]}
+    namespace eval test_ns_1::test_ns_2 {}
+} -body {
+    namespace eval test_ns_1::test_ns_foo {}
+    lsort [namespace children test_ns_1 test*]
+} -result {::test_ns_1::test_ns_2 ::test_ns_1::test_ns_foo}
+test namespace-21.8 {NamespaceChildrenCmd, trivial pattern starting with ::} {
+    namespace eval test_ns_1 {}
+    namespace children [namespace current] [fq test_ns_1]
+} [fq test_ns_1]
+
+test namespace-22.1 {NamespaceCodeCmd, bad args} {
+    catch {namespace delete {*}[namespace children :: test_ns_*]}
+    list [catch {namespace code} msg] $msg \
+         [catch {namespace code xxx yyy} msg] $msg
+} {1 {wrong # args: should be "namespace code arg"} 1 {wrong # args: should be "namespace code arg"}}
+test namespace-22.2 {NamespaceCodeCmd, arg is already scoped value} {
+    namespace eval test_ns_1 {
+        proc cmd {} {return "test_ns_1::cmd"}
+    }
+    namespace code {::namespace inscope ::test_ns_1 cmd}
+} {::namespace inscope ::test_ns_1 cmd}
+test namespace-22.3 {NamespaceCodeCmd, arg is already scoped value} {
+    namespace code {namespace     inscope     ::test_ns_1 cmd}
+} {::namespace inscope :: {namespace     inscope     ::test_ns_1 cmd}}
+test namespace-22.4 {NamespaceCodeCmd, in :: namespace} {
+    namespace code unknown
+} {::namespace inscope :: unknown}
+test namespace-22.5 {NamespaceCodeCmd, in other namespace} {
+    namespace eval test_ns_1 {
+        namespace code cmd
+    }
+} {::namespace inscope ::test_ns_1 cmd}
+test namespace-22.6 {NamespaceCodeCmd, in other namespace} { 
+    namespace eval test_ns_1 { 
+	variable v 42 
+    } 
+    namespace eval test_ns_2 { 
+	proc namespace args {} 
+    } 
+    namespace eval test_ns_2 [namespace eval test_ns_1 { 
+	namespace code {set v} 
+    }] 
+} {42} 
+test namespace-22.7 {NamespaceCodeCmd, Bug 3202171} {
+    namespace eval demo {
+	proc namespace args {puts $args}
+	::namespace code {namespace inscope foo}
+    }
+} [list ::namespace inscope [fq demo] {namespace inscope foo}]
+
+test namespace-23.1 {NamespaceCurrentCmd, bad args} {
+    catch {namespace delete {*}[namespace children :: test_ns_*]}
+    list [catch {namespace current xxx} msg] $msg \
+         [catch {namespace current xxx yyy} msg] $msg
+} {1 {wrong # args: should be "namespace current"} 1 {wrong # args: should be "namespace current"}}
+test namespace-23.2 {NamespaceCurrentCmd, at global level} {
+    namespace current
+} {::}
+test namespace-23.3 {NamespaceCurrentCmd, in nested ns} {
+    namespace eval test_ns_1::test_ns_2 {
+        namespace current
+    }
+} {::test_ns_1::test_ns_2}
+
+test namespace-24.1 {NamespaceDeleteCmd, no args} {
+    catch {namespace delete {*}[namespace children :: test_ns_*]}
+    namespace delete
+} {}
+test namespace-24.2 {NamespaceDeleteCmd, one arg} {
+    namespace eval test_ns_1::test_ns_2 {}
+    namespace delete ::test_ns_1
+} {}
+test namespace-24.3 {NamespaceDeleteCmd, two args} {
+    namespace eval test_ns_1::test_ns_2 {}
+    list [namespace delete ::test_ns_1::test_ns_2] [namespace delete ::test_ns_1]
+} {{} {}}
+test namespace-24.4 {NamespaceDeleteCmd, unknown ns} {
+    list [catch {namespace delete ::test_ns_foo} msg] $msg
+} {1 {unknown namespace "::test_ns_foo" in namespace delete command}}
+
+test namespace-25.1 {NamespaceEvalCmd, bad args} {
+    catch {namespace delete {*}[namespace children :: test_ns_*]}
+    list [catch {namespace eval} msg] $msg
+} {1 {wrong # args: should be "namespace eval name arg ?arg...?"}}
+test namespace-25.2 {NamespaceEvalCmd, bad args} -body {
+    namespace test_ns_1
+} -returnCodes error -match glob -result {unknown or ambiguous subcommand "test_ns_1": must be *}
+catch {unset v}
+test namespace-25.3 {NamespaceEvalCmd, new namespace} {
+    set v 123
+    namespace eval test_ns_1 {
+        variable v 314159
+        proc p {} {
+            variable v
+            return $v
+        }
+    }
+    test_ns_1::p
+} {314159}
+test namespace-25.4 {NamespaceEvalCmd, existing namespace} -setup {
+    namespace eval test_ns_1 {
+        variable v 314159
+        proc p {} {
+            variable v
+            return $v
+        }
+    }
+} -body {
+    namespace eval test_ns_1 {
+        proc q {} {return [expr {[p]+1}]}
+    }
+    test_ns_1::q
+} -result {314160}
+test namespace-25.5 {NamespaceEvalCmd, multiple args} -setup {
+    namespace eval test_ns_1 {variable v 314159}
+} -body {
+    namespace eval test_ns_1 "set" "v"
+} -result {314159}
+test namespace-25.6 {NamespaceEvalCmd, error in eval'd script} {
+    list [catch {namespace eval test_ns_1 {xxxx}} msg] $msg $::errorInfo
+} {1 {invalid command name "xxxx"} {invalid command name "xxxx"
+    while executing
+"xxxx"
+    (in namespace eval "::test_ns_1" script line 1)
+    invoked from within
+"namespace eval test_ns_1 {xxxx}"}}
+test namespace-25.7 {NamespaceEvalCmd, error in eval'd script} {
+    list [catch {namespace eval test_ns_1 {error foo bar baz}} msg] $msg $::errorInfo
+} {1 foo {bar
+    (in namespace eval "::test_ns_1" script line 1)
+    invoked from within
+"namespace eval test_ns_1 {error foo bar baz}"}}
+test namespace-25.8 {NamespaceEvalCmd, error in eval'd script} {
+    list [catch {namespace eval test_ns_1 error foo bar baz} msg] $msg $::errorInfo
+} {1 foo {bar
+    (in namespace eval "::test_ns_1" script line 1)
+    invoked from within
+"namespace eval test_ns_1 error foo bar baz"}}
+catch {unset v}
+test namespace-25.9 {NamespaceEvalCmd, 545325} {
+    namespace eval test_ns_1 info level 0
+} {namespace eval test_ns_1 info level 0}
+
+test namespace-26.1 {NamespaceExportCmd, no args and new ns} {
+    catch {namespace delete {*}[namespace children :: test_ns_*]}
+    namespace export
+} {}
+test namespace-26.2 {NamespaceExportCmd, just -clear arg} {
+    namespace export -clear
+} {}
+test namespace-26.3 {NamespaceExportCmd, pattern can't specify a namespace} {
+    namespace eval test_ns_1 {
+        list [catch {namespace export ::zzz} msg] $msg
+    }
+} {1 {invalid export pattern "::zzz": pattern can't specify a namespace}}
+test namespace-26.4 {NamespaceExportCmd, one pattern} {
+    namespace eval test_ns_1 {
+        namespace export cmd1
+        proc cmd1 {args} {return "cmd1: $args"}
+        proc cmd2 {args} {return "cmd2: $args"}
+        proc cmd3 {args} {return "cmd3: $args"}
+        proc cmd4 {args} {return "cmd4: $args"}
+    }
+    namespace eval test_ns_2 {
+        namespace import ::test_ns_1::*
+    }
+    list [info commands test_ns_2::*] [test_ns_2::cmd1 hello]
+} {::test_ns_2::cmd1 {cmd1: hello}}
+test namespace-26.5 {NamespaceExportCmd, sequence of patterns, patterns accumulate} -setup {
+    catch {namespace delete {*}[namespace children test_ns_*]}
+    namespace eval test_ns_1 {
+        proc cmd1 {args} {return "cmd1: $args"}
+        proc cmd2 {args} {return "cmd2: $args"}
+        proc cmd3 {args} {return "cmd3: $args"}
+        proc cmd4 {args} {return "cmd4: $args"}
+        namespace export cmd1 cmd3
+    }
+} -body {
+    namespace eval test_ns_2 {
+        namespace import -force ::test_ns_1::*
+    }
+    list [lsort [info commands test_ns_2::*]] [test_ns_2::cmd3 hello]
+} -result {{::test_ns_2::cmd1 ::test_ns_2::cmd3} {cmd3: hello}}
+test namespace-26.6 {NamespaceExportCmd, no patterns means return uniq'ed export list} -setup {
+    catch {namespace delete {*}[namespace children test_ns_*]}
+    namespace eval test_ns_1 {
+        proc cmd1 {args} {return "cmd1: $args"}
+        proc cmd2 {args} {return "cmd2: $args"}
+        proc cmd3 {args} {return "cmd3: $args"}
+        proc cmd4 {args} {return "cmd4: $args"}
+        namespace export cmd1 cmd3
+    }
+} -body {
+    namespace eval test_ns_1 {
+        namespace export
+    }
+} -result {cmd1 cmd3}
+test namespace-26.7 {NamespaceExportCmd, -clear resets export list} -setup {
+    catch {namespace delete {*}[namespace children test_ns_*]}
+    namespace eval test_ns_1 {
+        proc cmd1 {args} {return "cmd1: $args"}
+        proc cmd2 {args} {return "cmd2: $args"}
+        proc cmd3 {args} {return "cmd3: $args"}
+        proc cmd4 {args} {return "cmd4: $args"}
+    }
+} -body {
+    namespace eval test_ns_1 {
+        namespace export cmd1 cmd3
+    }
+    namespace eval test_ns_2 {
+        namespace import ::test_ns_1::*
+    }
+    namespace eval test_ns_1 {
+        namespace export -clear cmd4
+    }
+    namespace eval test_ns_2 {
+        namespace import ::test_ns_1::*
+    }
+    list [lsort [info commands test_ns_2::*]] [test_ns_2::cmd4 hello]
+} -result [list [lsort {::test_ns_2::cmd4 ::test_ns_2::cmd1 ::test_ns_2::cmd3}] {cmd4: hello}]
+test namespace-26.8 {NamespaceExportCmd, -clear resets export list} {
+    catch {namespace delete foo}
+    namespace eval foo {
+	namespace export x
+	namespace export -clear
+    }
+    list [namespace eval foo namespace export] [namespace delete foo]
+} {{} {}}
+
+test namespace-27.1 {NamespaceForgetCmd, no args} {
+    catch {namespace delete {*}[namespace children :: test_ns_*]}
+    namespace forget
+} {}
+test namespace-27.2 {NamespaceForgetCmd, args must be valid namespaces} {
+    list [catch {namespace forget ::test_ns_1::xxx} msg] $msg
+} {1 {unknown namespace in namespace forget pattern "::test_ns_1::xxx"}}
+test namespace-27.3 {NamespaceForgetCmd, arg is forgotten} {
+    namespace eval test_ns_1 {
+        namespace export cmd*
+        proc cmd1 {args} {return "cmd1: $args"}
+        proc cmd2 {args} {return "cmd2: $args"}
+    }
+    namespace eval test_ns_2 {
+        namespace import ::test_ns_1::*
+        namespace forget ::test_ns_1::cmd1
+    }
+    info commands ::test_ns_2::*
+} {::test_ns_2::cmd2}
+
+test namespace-28.1 {NamespaceImportCmd, no args} -setup {
+    catch {namespace delete {*}[namespace children :: test_ns_*]}
+} -body {
+    namespace eval ::test_ns_1 {
+	proc foo {} {}
+	proc bar {} {}
+	proc boo {} {}
+	proc glorp {} {}
+	namespace export foo b*
+    }
+    namespace eval ::test_ns_2 {
+	namespace import ::test_ns_1::*
+	lsort [namespace import]
+    }
+} -cleanup {
+    catch {namespace delete {*}[namespace children :: test_ns_*]}
+} -result {bar boo foo}
+test namespace-28.2 {NamespaceImportCmd, no args and just "-force"} {
+    namespace import -force
+} {}
+test namespace-28.3 {NamespaceImportCmd, arg is imported} {
+    namespace eval test_ns_1 {
+        namespace export cmd2
+        proc cmd1 {args} {return "cmd1: $args"}
+        proc cmd2 {args} {return "cmd2: $args"}
+    }
+    namespace eval test_ns_2 {
+        namespace import ::test_ns_1::*
+        namespace forget ::test_ns_1::cmd1
+    }
+    info commands test_ns_2::*
+} {::test_ns_2::cmd2}
+
+test namespace-29.1 {NamespaceInscopeCmd, bad args} {
+    catch {namespace delete {*}[namespace children :: test_ns_*]}
+    list [catch {namespace inscope} msg] $msg
+} {1 {wrong # args: should be "namespace inscope name arg ?arg...?"}}
+test namespace-29.2 {NamespaceInscopeCmd, bad args} {
+    list [catch {namespace inscope ::} msg] $msg
+} {1 {wrong # args: should be "namespace inscope name arg ?arg...?"}}
+test namespace-29.3 {NamespaceInscopeCmd, specified ns must exist} -body {
+    namespace inscope test_ns_1 {set v}
+} -returnCodes error -result {namespace "test_ns_1" not found in "::"}
+test namespace-29.4 {NamespaceInscopeCmd, simple case} {
+    namespace eval test_ns_1 {
+        variable v 747
+        proc cmd {args} {
+            variable v
+            return "[namespace current]::cmd: v=$v, args=$args"
+        }
+    }
+    namespace inscope test_ns_1 cmd
+} {::test_ns_1::cmd: v=747, args=}
+test namespace-29.5 {NamespaceInscopeCmd, has lappend semantics} -setup {
+    namespace eval test_ns_1 {
+        variable v 747
+        proc cmd {args} {
+            variable v
+            return "[namespace current]::cmd: v=$v, args=$args"
+        }
+    }
+} -body {
+    list [namespace inscope test_ns_1 cmd x y z] \
+         [namespace eval test_ns_1 [concat cmd [list x y z]]]
+} -result {{::test_ns_1::cmd: v=747, args=x y z} {::test_ns_1::cmd: v=747, args=x y z}}
+test namespace-29.6 {NamespaceInscopeCmd, 1400572} -setup {
+    namespace eval test_ns_1 {}
+} -body {
+    namespace inscope test_ns_1 {info level 0}
+} -result {namespace inscope test_ns_1 {info level 0}}
+
+test namespace-30.1 {NamespaceOriginCmd, bad args} {
+    catch {namespace delete {*}[namespace children :: test_ns_*]}
+    list [catch {namespace origin} msg] $msg
+} {1 {wrong # args: should be "namespace origin name"}}
+test namespace-30.2 {NamespaceOriginCmd, bad args} {
+    list [catch {namespace origin x y} msg] $msg
+} {1 {wrong # args: should be "namespace origin name"}}
+test namespace-30.3 {NamespaceOriginCmd, command not found} {
+    list [catch {namespace origin fred} msg] $msg
+} {1 {invalid command name "fred"}}
+test namespace-30.4 {NamespaceOriginCmd, command isn't imported} {
+    namespace origin set
+} {::set}
+test namespace-30.5 {NamespaceOriginCmd, imported command} {
+    namespace eval test_ns_1 {
+        namespace export cmd*
+        proc cmd1 {args} {return "cmd1: $args"}
+        proc cmd2 {args} {return "cmd2: $args"}
+    }
+    namespace eval test_ns_2 {
+        namespace export *
+        namespace import ::test_ns_1::*
+        proc p {} {}
+    }
+    namespace eval test_ns_3 {
+        namespace import ::test_ns_2::*
+        list [namespace origin foreach] \
+             [namespace origin p] \
+             [namespace origin cmd1] \
+             [namespace origin ::test_ns_2::cmd2]
+    }
+} {::foreach ::test_ns_2::p ::test_ns_1::cmd1 ::test_ns_1::cmd2}
+
+test namespace-31.1 {NamespaceParentCmd, bad args} {
+    catch {namespace delete {*}[namespace children :: test_ns_*]}
+    list [catch {namespace parent a b} msg] $msg
+} {1 {wrong # args: should be "namespace parent ?name?"}}
+test namespace-31.2 {NamespaceParentCmd, no args} {
+    namespace parent
+} {}
+test namespace-31.3 {NamespaceParentCmd, namespace specified} {
+    namespace eval test_ns_1 {
+        namespace eval test_ns_2 {
+            namespace eval test_ns_3 {}
+        }
+    }
+    list [namespace parent ::] \
+         [namespace parent test_ns_1::test_ns_2] \
+         [namespace eval test_ns_1::test_ns_2::test_ns_3 {namespace parent ::test_ns_1::test_ns_2}]
+} {{} ::test_ns_1 ::test_ns_1}
+test namespace-31.4 {NamespaceParentCmd, bad namespace specified} -body {
+    namespace parent test_ns_1::test_ns_foo
+} -returnCodes error -result {namespace "test_ns_1::test_ns_foo" not found in "::"}
+
+test namespace-32.1 {NamespaceQualifiersCmd, bad args} {
+    catch {namespace delete {*}[namespace children :: test_ns_*]}
+    list [catch {namespace qualifiers} msg] $msg
+} {1 {wrong # args: should be "namespace qualifiers string"}}
+test namespace-32.2 {NamespaceQualifiersCmd, bad args} {
+    list [catch {namespace qualifiers x y} msg] $msg
+} {1 {wrong # args: should be "namespace qualifiers string"}}
+test namespace-32.3 {NamespaceQualifiersCmd, simple name} {
+    namespace qualifiers foo
+} {}
+test namespace-32.4 {NamespaceQualifiersCmd, leading ::} {
+    namespace qualifiers ::x::y::z
+} {::x::y}
+test namespace-32.5 {NamespaceQualifiersCmd, no leading ::} {
+    namespace qualifiers a::b
+} {a}
+test namespace-32.6 {NamespaceQualifiersCmd, :: argument} {
+    namespace qualifiers ::
+} {}
+test namespace-32.7 {NamespaceQualifiersCmd, odd number of :s} {
+    namespace qualifiers :::::
+} {}
+test namespace-32.8 {NamespaceQualifiersCmd, odd number of :s} {
+    namespace qualifiers foo:::
+} {foo}
+
+test namespace-33.1 {NamespaceTailCmd, bad args} {
+    catch {namespace delete {*}[namespace children :: test_ns_*]}
+    list [catch {namespace tail} msg] $msg
+} {1 {wrong # args: should be "namespace tail string"}}
+test namespace-33.2 {NamespaceTailCmd, bad args} {
+    list [catch {namespace tail x y} msg] $msg
+} {1 {wrong # args: should be "namespace tail string"}}
+test namespace-33.3 {NamespaceTailCmd, simple name} {
+    namespace tail foo
+} {foo}
+test namespace-33.4 {NamespaceTailCmd, leading ::} {
+    namespace tail ::x::y::z
+} {z}
+test namespace-33.5 {NamespaceTailCmd, no leading ::} {
+    namespace tail a::b
+} {b}
+test namespace-33.6 {NamespaceTailCmd, :: argument} {
+    namespace tail ::
+} {}
+test namespace-33.7 {NamespaceTailCmd, odd number of :s} {
+    namespace tail :::::
+} {}
+test namespace-33.8 {NamespaceTailCmd, odd number of :s} {
+    namespace tail foo:::
+} {}
+
+test namespace-34.1 {NamespaceWhichCmd, bad args} {
+    catch {namespace delete {*}[namespace children :: test_ns_*]}
+    list [catch {namespace which} msg] $msg
+} {1 {wrong # args: should be "namespace which ?-command? ?-variable? name"}}
+test namespace-34.2 {NamespaceWhichCmd, bad args} {
+    list [catch {namespace which -fred x} msg] $msg
+} {1 {wrong # args: should be "namespace which ?-command? ?-variable? name"}}
+test namespace-34.3 {NamespaceWhichCmd, single arg is always command name} {
+    namespace which -command
+} {}
+test namespace-34.4 {NamespaceWhichCmd, bad args} {
+    list [catch {namespace which a b} msg] $msg
+} {1 {wrong # args: should be "namespace which ?-command? ?-variable? name"}}
+test namespace-34.5 {NamespaceWhichCmd, command lookup} -setup {
+    catch {namespace delete {*}[namespace children test_ns_*]}
+    namespace eval test_ns_1 {
+        namespace export cmd*
+        variable v1 111
+        proc cmd1 {args} {return "cmd1: $args"}
+        proc cmd2 {args} {return "cmd2: $args"}
+    }
+    namespace eval test_ns_2 {
+        namespace export *
+        namespace import ::test_ns_1::*
+        variable v2 222
+        proc p {} {}
+    }
+} -body {
+    namespace eval test_ns_3 {
+        namespace import ::test_ns_2::*
+        variable v3 333
+        list [namespace which -command foreach] \
+             [namespace which -command p] \
+             [namespace which -command cmd1] \
+             [namespace which -command ::test_ns_2::cmd2] \
+             [catch {namespace which -command ::test_ns_2::noSuchCmd} msg] $msg
+    }
+} -result {::foreach ::test_ns_3::p ::test_ns_3::cmd1 ::test_ns_2::cmd2 0 {}}
+test namespace-34.6 {NamespaceWhichCmd, -command is default} -setup {
+    catch {namespace delete {*}[namespace children test_ns_*]}
+    namespace eval test_ns_1 {
+        namespace export cmd*
+        proc cmd1 {args} {return "cmd1: $args"}
+        proc cmd2 {args} {return "cmd2: $args"}
+    }
+    namespace eval test_ns_2 {
+        namespace export *
+        namespace import ::test_ns_1::*
+        proc p {} {}
+    }
+    namespace eval test_ns_3 {
+        namespace import ::test_ns_2::*
+    }
+} -body {
+    namespace eval test_ns_3 {
+        list [namespace which foreach] \
+             [namespace which p] \
+             [namespace which cmd1] \
+             [namespace which ::test_ns_2::cmd2]
+    }
+} -result {::foreach ::test_ns_3::p ::test_ns_3::cmd1 ::test_ns_2::cmd2}
+test namespace-34.7 {NamespaceWhichCmd, variable lookup} -setup {
+    catch {namespace delete {*}[namespace children test_ns_*]}
+    namespace eval test_ns_1 {
+        namespace export cmd*
+        proc cmd1 {args} {return "cmd1: $args"}
+        proc cmd2 {args} {return "cmd2: $args"}
+    }
+    namespace eval test_ns_2 {
+        namespace export *
+        namespace import ::test_ns_1::*
+        variable v2 222
+        proc p {} {}
+    }
+    namespace eval test_ns_3 {
+        variable v3 333
+        namespace import ::test_ns_2::*
+    }
+} -body {
+    namespace eval test_ns_3 {
+        list [namespace which -variable env] \
+             [namespace which -variable v3] \
+             [namespace which -variable ::test_ns_2::v2] \
+             [catch {namespace which -variable ::test_ns_2::noSuchVar} msg] $msg
+    }
+} -result {::env ::test_ns_3::v3 ::test_ns_2::v2 0 {}}
+
+test namespace-35.1 {FreeNsNameInternalRep, resulting ref count > 0} -setup {
+    catch {namespace delete {*}[namespace children :: test_ns_*]}
+} -body {
+    namespace eval test_ns_1 {
+        proc p {} {
+            namespace delete [namespace current]
+            return [namespace current]
+        }
+    }
+    test_ns_1::p
+} -result {::test_ns_1}
+test namespace-35.2 {FreeNsNameInternalRep, resulting ref count == 0} {
+    namespace eval test_ns_1 {
+        proc q {} {
+            return [namespace current]
+        }
+    }
+    list [test_ns_1::q] \
+         [namespace delete test_ns_1] \
+         [catch {test_ns_1::q} msg] $msg
+} {::test_ns_1 {} 1 {invalid command name "test_ns_1::q"}}
+
+catch {unset x}
+catch {unset y}
+test namespace-36.1 {DupNsNameInternalRep} {
+    catch {namespace delete {*}[namespace children :: test_ns_*]}
+    namespace eval test_ns_1 {}
+    set x "::test_ns_1"
+    list [namespace parent $x] [set y $x] [namespace parent $y]
+} {:: ::test_ns_1 ::}
+catch {unset x}
+catch {unset y}
+
+test namespace-37.1 {SetNsNameFromAny, ns name found} {
+    catch {namespace delete {*}[namespace children :: test_ns_*]}
+    namespace eval test_ns_1::test_ns_2 {}
+    namespace eval test_ns_1 {
+        namespace children ::test_ns_1
+    }
+} {::test_ns_1::test_ns_2}
+test namespace-37.2 {SetNsNameFromAny, ns name not found} -body {
+    namespace eval test_ns_1 {
+        namespace children ::test_ns_1::test_ns_foo
+    }
+} -returnCodes error -result {namespace "::test_ns_1::test_ns_foo" not found}
+
+test namespace-38.1 {UpdateStringOfNsName} {
+    catch {namespace delete {*}[namespace children :: test_ns_*]}
+    ;# Tcl_NamespaceObjCmd calls UpdateStringOfNsName to get subcmd name
+    list [namespace eval {} {namespace current}] \
+         [namespace eval {} {namespace current}]
+} {:: ::}
+
+test namespace-39.1 {NamespaceExistsCmd} {
+    catch {namespace delete {*}[namespace children :: test_ns_*]}
+    namespace eval ::test_ns_z::test_me { variable foo }
+    list [namespace exists ::] \
+	    [namespace exists ::bogus_namespace] \
+	    [namespace exists ::test_ns_z] \
+	    [namespace exists test_ns_z] \
+	    [namespace exists ::test_ns_z::foo] \
+	    [namespace exists ::test_ns_z::test_me] \
+	    [namespace eval ::test_ns_z { namespace exists ::test_me }] \
+	    [namespace eval ::test_ns_z { namespace exists test_me }] \
+	    [namespace exists :::::test_ns_z]
+} {1 0 1 1 0 1 0 1 1}
+test namespace-39.2 {NamespaceExistsCmd error} {
+    list [catch {namespace exists} msg] $msg
+} {1 {wrong # args: should be "namespace exists name"}}
+test namespace-39.3 {NamespaceExistsCmd error} {
+    list [catch {namespace exists a b} msg] $msg
+} {1 {wrong # args: should be "namespace exists name"}}
+
+test namespace-40.1 {Ignoring namespace proc "unknown"} -setup {
+    rename unknown _unknown
+} -body {
+    proc unknown args {return global}
+    namespace eval ns {proc unknown args {return local}}
+    list [namespace eval ns aaa bbb] [namespace eval ns aaa]
+} -cleanup {
+    rename unknown {}   
+    rename _unknown unknown
+    namespace delete ns
+} -result {global global}
+
+test namespace-41.1 {Shadowing byte-compiled commands, Bug: 231259} {
+    set res {}
+    namespace eval ns {
+	set res {}
+	proc test {} {
+	    set ::g 0
+	}  
+	lappend ::res [test]
+	proc set {a b} {
+	    ::set a [incr b]
+	}
+	lappend ::res [test]
+    }
+    namespace delete ns
+    set res
+} {0 1}
+test namespace-41.2 {Shadowing byte-compiled commands, Bug: 231259} {
+    set res {}
+    namespace eval ns {}
+    proc ns::a {i} {
+	variable b
+	proc set args {return "New proc is called"}
+	return [set b $i]
+    }
+    ns::a 1
+    set res [ns::a 2]
+    namespace delete ns
+    set res
+} {New proc is called}
+test namespace-41.3 {Shadowing byte-compiled commands, Bugs: 231259, 729692} {
+    set res {}
+    namespace eval ns {
+	variable b 0
+    }
+    proc ns::a {i} {
+	variable b
+	proc set args {return "New proc is called"}
+	return [set b $i]
+    }
+    set res [list [ns::a 1] $ns::b]
+    namespace delete ns
+    set res
+} {{New proc is called} 0}
+
+# Ensembles (TIP#112)
+
+test namespace-42.1 {ensembles: basic} {
+    namespace eval ns {
+	namespace export x
+	proc x {} {format 1}
+	namespace ensemble create
+    }
+    list [info command ns] [ns x] [namespace delete ns] [info command ns]
+} {ns 1 {} {}}
+test namespace-42.2 {ensembles: basic} {
+    namespace eval ns {
+	namespace export x
+	proc x {} {format 1}
+	namespace ensemble create
+    }
+    rename ns foo
+    list [info command foo] [foo x] [namespace delete ns] [info command foo]
+} {foo 1 {} {}}
+test namespace-42.3 {ensembles: basic} {
+    namespace eval ns {
+	namespace export x*
+	proc x1 {} {format 1}
+	proc x2 {} {format 2}
+	namespace ensemble create
+    }
+    set result [list [ns x1] [ns x2]]
+    lappend result [catch {ns x} msg] $msg
+    rename ns {}
+    lappend result [info command ns::x1]
+    namespace delete ns
+    lappend result [info command ns::x1]
+} {1 2 1 {unknown or ambiguous subcommand "x": must be x1, or x2} ::ns::x1 {}}
+test namespace-42.4 {ensembles: basic} -body {
+    namespace eval ns {
+	namespace export y*
+	proc x1 {} {format 1}
+	proc x2 {} {format 2}
+	namespace ensemble create
+    }
+    list [catch {ns x} msg] $msg
+} -cleanup {
+    namespace delete ns
+} -result {1 {unknown subcommand "x": namespace ::ns does not export any commands}}
+test namespace-42.5 {ensembles: basic} -body {
+    namespace eval ns {
+	namespace export x*
+	proc x1 {} {format 1}
+	proc x2 {} {format 2}
+	proc x3 {} {format 3}
+	namespace ensemble create
+    }
+    list [catch {ns x} msg] $msg
+} -cleanup {
+    namespace delete ns
+} -result {1 {unknown or ambiguous subcommand "x": must be x1, x2, or x3}}
+test namespace-42.6 {ensembles: nested} -body {
+    namespace eval ns {
+	namespace export x*
+	namespace eval x0 {
+	    proc z {} {format 0}
+	    namespace export z
+	    namespace ensemble create
+	}
+	proc x1 {} {format 1}
+	proc x2 {} {format 2}
+	proc x3 {} {format 3}
+	namespace ensemble create
+    }
+    list [ns x0 z] [ns x1] [ns x2] [ns x3]
+} -cleanup {
+    namespace delete ns
+} -result {0 1 2 3}
+test namespace-42.7 {ensembles: nested} -body {
+    namespace eval ns {
+	namespace export x*
+	namespace eval x0 {
+	    proc z {} {list [info level] [info level 1]}
+	    namespace export z
+	    namespace ensemble create
+	}
+	proc x1 {} {format 1}
+	proc x2 {} {format 2}
+	proc x3 {} {format 3}
+	namespace ensemble create
+    }
+    list [ns x0 z] [ns x1] [ns x2] [ns x3]
+} -cleanup {
+    namespace delete ns
+} -result {{1 z} 1 2 3}
+test namespace-42.8 {
+    ensembles: [Bug 1670091], panic due to pointer to a deallocated List
+    struct.
+} -setup {
+    proc demo args {}
+    variable target [list [namespace which demo] x]
+    proc trial args {variable target; string length $target}
+    trace add execution demo enter [namespace code trial]
+    namespace ensemble create -command foo -map [list bar $target]
+} -body {
+    foo bar
+} -cleanup {
+    unset target
+    rename demo {}
+    rename trial {}
+    rename foo {}
+} -result {}
+
+test namespace-42.9 {
+    ensembles: [Bug 4f6a1ebd64], segmentation fault due to pointer to a
+    deallocated List struct.
+} -setup {
+    namespace eval n {namespace ensemble create}
+    set lst [dict create one ::two]
+    namespace ensemble configure n -subcommands $lst -map $lst
+} -body {
+    n one
+} -cleanup {
+    namespace delete n
+    unset -nocomplain lst
+} -returnCodes error -match glob -result {invalid command name*}
+
+test namespace-42.10 {
+    ensembles: [Bug 4f6a1ebd64] segmentation fault due to pointer to a
+    deallocated List struct (this time with duplicate of one in "dict").
+} -setup {
+    namespace eval n {namespace ensemble create}
+    set lst [list one ::two one ::three]
+    namespace ensemble configure n -subcommands $lst -map $lst
+} -body {
+    n one
+} -cleanup {
+    namespace delete n
+    unset -nocomplain lst
+} -returnCodes error -match glob -result {invalid command name *three*}
+
+test namespace-43.1 {ensembles: dict-driven} {
+    namespace eval ns {
+	namespace export x*
+	proc x1 {} {format 1}
+	proc x2 {} {format 2}
+	namespace ensemble create -map {a x1 b x2}
+    }
+    set result [list [catch {ns c} msg] $msg [namespace ensemble exists ns]]
+    rename ns {}
+    lappend result [namespace ensemble exists ns]
+} {1 {unknown or ambiguous subcommand "c": must be a, or b} 1 0}
+test namespace-43.2 {ensembles: dict-driven} -body {
+    namespace eval ns {
+	namespace export x*
+	proc x1 {args} {list 1 $args}
+	proc x2 {args} {list 2 [llength $args]}
+	namespace ensemble create -map {
+	    a ::ns::x1 b ::ns::x2 c {::ns::x1 .} d {::ns::x2 .}
+	}
+    }
+    list [ns a] [ns b] [ns c] [ns c foo] [ns d] [ns d foo]
+} -cleanup {
+    namespace delete ns
+} -result {{1 {}} {2 0} {1 .} {1 {. foo}} {2 1} {2 2}}
+set SETUP {
+    namespace eval ns {
+	namespace export a b
+	proc a args {format 1,[llength $args]}
+	proc b args {format 2,[llength $args]}
+	proc c args {format 3,[llength $args]}
+	proc d args {format 4,[llength $args]}
+	namespace ensemble create -subcommands {b c}
+    }
+}
+test namespace-43.3 {ensembles: list-driven} -setup $SETUP -body {
+    namespace delete ns
+} -result {}
+test namespace-43.4 {ensembles: list-driven} -setup $SETUP -body {
+    ns a foo bar boo spong wibble
+} -cleanup {namespace delete ns} -returnCodes error -result {unknown or ambiguous subcommand "a": must be b, or c}
+test namespace-43.5 {ensembles: list-driven} -setup $SETUP -body {
+    ns b foo bar boo spong wibble
+} -cleanup {namespace delete ns} -result 2,5
+test namespace-43.6 {ensembles: list-driven} -setup $SETUP -body {
+    ns c foo bar boo spong wibble
+} -cleanup {namespace delete ns} -result 3,5
+test namespace-43.7 {ensembles: list-driven} -setup $SETUP -body {
+    ns d foo bar boo spong wibble
+} -cleanup {namespace delete ns} -returnCodes error -result {unknown or ambiguous subcommand "d": must be b, or c}
+set SETUP {
+    namespace eval ns {
+	namespace export a b
+	proc a args {format 1,[llength $args]}
+	proc b args {format 2,[llength $args]}
+	proc c args {format 3,[llength $args]}
+	proc d args {format 4,[llength $args]}
+	namespace ensemble create -subcommands {b c} -map {c ::ns::d}
+    }
+}
+test namespace-43.8 {ensembles: list-and-map-driven} -setup $SETUP -body {
+    namespace delete ns
+} -result {}
+test namespace-43.9 {ensembles: list-and-map-driven} -setup $SETUP -body {
+    ns a foo bar boo spong wibble
+} -cleanup {namespace delete ns} -returnCodes error -result {unknown or ambiguous subcommand "a": must be b, or c}
+test namespace-43.10 {ensembles: list-and-map-driven} -setup $SETUP -body {
+    ns b foo bar boo spong wibble
+} -cleanup {namespace delete ns} -result 2,5
+test namespace-43.11 {ensembles: list-and-map-driven} -setup $SETUP -body {
+    ns c foo bar boo spong wibble
+} -cleanup {namespace delete ns} -result 4,5
+test namespace-43.12 {ensembles: list-and-map-driven} -setup $SETUP -body {
+    ns d foo bar boo spong wibble
+} -cleanup {namespace delete ns} -returnCodes error -result {unknown or ambiguous subcommand "d": must be b, or c}
+set SETUP {
+    namespace eval ns {
+	namespace export *
+	proc foo args {format bar}
+	proc spong args {format wibble}
+	namespace ensemble create -prefixes off
+    }
+}
+test namespace-43.13 {ensembles: turn off prefixes} -setup $SETUP -body {
+    namespace delete ns
+} -result {}
+test namespace-43.14 {ensembles: turn off prefixes} -setup $SETUP -body {
+    ns fo
+} -cleanup {namespace delete ns} -returnCodes error -result {unknown subcommand "fo": must be foo, or spong}
+test namespace-43.15 {ensembles: turn off prefixes} -setup $SETUP -body {
+    ns foo
+} -cleanup {namespace delete ns} -result bar
+test namespace-43.16 {ensembles: turn off prefixes} -setup $SETUP -body {
+    ns s
+} -cleanup {namespace delete ns} -returnCodes error -result {unknown subcommand "s": must be foo, or spong}
+test namespace-43.17 {ensembles: turn off prefixes} -setup $SETUP -body {
+    ns spong
+} -cleanup {namespace delete ns} -result wibble
+
+test namespace-44.1 {ensemble: errors} {
+    list [catch {namespace ensemble} msg] $msg
+} {1 {wrong # args: should be "namespace ensemble subcommand ?arg ...?"}}
+test namespace-44.2 {ensemble: errors} {
+    list [catch {namespace ensemble ?} msg] $msg
+} {1 {bad subcommand "?": must be configure, create, or exists}}
+test namespace-44.3 {ensemble: errors} {
+    namespace eval ns {
+	list [catch {namespace ensemble create -map x} msg] $msg
+    }
+} {1 {missing value to go with key}}
+test namespace-44.4 {ensemble: errors} {
+    namespace eval ns {
+	list [catch {namespace ensemble create -map {x {}}} msg] $msg
+    }
+} {1 {ensemble subcommand implementations must be non-empty lists}}
+test namespace-44.5 {ensemble: errors} -setup {
+    namespace ensemble create -command foobar -subcommands {foobarcget foobarconfigure}
+} -body {
+    foobar foobarcon
+} -cleanup {
+    rename foobar {}
+} -returnCodes error -result {invalid command name "foobarconfigure"}
+test namespace-44.6 {ensemble: errors} -returnCodes error -body {
+    namespace ensemble create gorp
+} -result {wrong # args: should be "namespace ensemble create ?option value ...?"}
+
+test namespace-45.1 {ensemble: introspection} {
+    namespace eval ns {
+	namespace export x
+	proc x {} {}
+	namespace ensemble create
+	set ::result [namespace ensemble configure ::ns]
+    }
+    namespace delete ns
+    set result
+} {-map {} -namespace ::ns -parameters {} -prefixes 1 -subcommands {} -unknown {}}
+test namespace-45.2 {ensemble: introspection} {
+    namespace eval ns {
+	namespace export x
+	proc x {} {}
+	namespace ensemble create -map {A x}
+	set ::result [namespace ensemble configure ::ns -map]
+    }
+    namespace delete ns
+    set result
+} {A ::ns::x}
+
+test namespace-46.1 {ensemble: modification} {
+    namespace eval ns {
+	namespace export x
+	proc x {} {format 123}
+	# Ensemble maps A->x
+	namespace ensemble create -command ns -map {A ::ns::x}
+	set ::result [list [namespace ensemble configure ns -map] [ns A]]
+	# Ensemble maps B->x
+	namespace ensemble configure ns -map {B ::ns::x}
+	lappend ::result [namespace ensemble configure ns -map] [ns B]
+	# Ensemble maps x->x
+	namespace ensemble configure ns -map {}
+	lappend ::result [namespace ensemble configure ns -map] [ns x]
+    }
+    namespace delete ns
+    set result
+} {{A ::ns::x} 123 {B ::ns::x} 123 {} 123}
+test namespace-46.2 {ensemble: ensembles really use current export list} {
+    namespace eval ns {
+	namespace export x1
+	proc x1 {} {format 1}
+	proc x2 {} {format 1}
+	namespace ensemble create
+    }
+    catch {ns ?} msg; set result [list $msg]
+    namespace eval ns {namespace export x*}
+    catch {ns ?} msg; lappend result $msg
+    rename ns::x1 {}
+    catch {ns ?} msg; lappend result $msg
+    namespace delete ns
+    set result
+} {{unknown or ambiguous subcommand "?": must be x1} {unknown or ambiguous subcommand "?": must be x1, or x2} {unknown or ambiguous subcommand "?": must be x2}}
+test namespace-46.3 {ensemble: implementation errors} {
+    namespace eval ns {
+	variable count 0
+	namespace ensemble create -map {
+	    a {::lappend ::result}
+	    b {::incr ::ns::count}
+	}
+    }
+    set result {}
+    lappend result [catch { ns } msg] $msg
+    ns a [ns b 10]
+    catch {rename p {}}
+    rename ns p
+    p a [p b 3000]
+    lappend result $ns::count
+    namespace delete ns
+    lappend result [info command p]
+} {1 {wrong # args: should be "ns subcommand ?arg ...?"} 10 3010 3010 {}}
+test namespace-46.4 {ensemble: implementation errors} {
+    namespace eval ns {
+	namespace ensemble create
+    }
+    set result [info command ns]
+    lappend result [catch {ns ?} msg] $msg
+    namespace delete ns
+    set result
+} {ns 1 {unknown subcommand "?": namespace ::ns does not export any commands}}
+test namespace-46.5 {ensemble: implementation errors} {
+    namespace eval ns {
+	namespace ensemble create -map {makeError ::error}
+    }
+    list [catch {ns makeError "an error happened"} msg] $msg $::errorInfo [namespace delete ns]
+} {1 {an error happened} {an error happened
+    while executing
+"ns makeError "an error happened""} {}}
+test namespace-46.6 {ensemble: implementation renames/deletes itself} {
+    namespace eval ns {
+	namespace ensemble create -map {to ::rename}
+    }
+    ns to ns foo
+    foo to foo bar
+    bar to bar spong
+    spong to spong {}
+    namespace delete ns
+} {}
+test namespace-46.7 {ensemble: implementation deletes its namespace} {
+    namespace eval ns {
+	namespace ensemble create -map {kill {::namespace delete}}
+    }
+    ns kill ns
+} {}
+test namespace-46.8 {ensemble: implementation deletes its namespace} {
+    namespace eval ns {
+	namespace export *
+	proc foo {} {
+	    variable x 1
+	    bar
+	    # Tricky; what is the correct return value anyway?
+	    info exist x
+	}
+	proc bar {} {
+	    namespace delete [namespace current]
+	}
+	namespace ensemble create
+    }
+    list [ns foo] [info exist ns::x]
+} {1 0}
+test namespace-46.9 {ensemble: configuring really configures things} {
+    namespace eval ns {
+	namespace ensemble create -map {a a} -prefixes 0
+    }
+    set result [list [catch {ns x} msg] $msg]
+    namespace ensemble configure ns -map {b b}
+    lappend result [catch {ns x} msg] $msg
+    namespace delete ns
+    set result
+} {1 {unknown subcommand "x": must be a} 1 {unknown subcommand "x": must be b}}
+
+test namespace-47.1 {ensemble: unknown handler} {
+    set log {}
+    namespace eval ns {
+	namespace export {[a-z]*}
+	proc Magic {ensemble subcmd args} {
+	    global log
+	    if {[string match {[a-z]*} $subcmd]} {
+		lappend log "making $subcmd"
+		proc $subcmd args {
+		    global log
+		    lappend log "running [info level 0]"
+		    llength $args
+		}
+	    } else {
+		lappend log "unknown $subcmd - args = $args"
+		return -code error \
+			"unknown or protected subcommand \"$subcmd\""
+	    }
+	}
+	namespace ensemble create -unknown ::ns::Magic
+    }
+    set result {}
+    lappend result [catch {ns a b c} msg] $msg
+    lappend result [catch {ns a b c} msg] $msg
+    lappend result [catch {ns b c d} msg] $msg
+    lappend result [catch {ns c d e} msg] $msg
+    lappend result [catch {ns Magic foo bar spong wibble} msg] $msg
+    list $result [lsort [info commands ::ns::*]] $log [namespace delete ns]
+} {{0 2 0 2 0 2 0 2 1 {unknown or protected subcommand "Magic"}} {::ns::Magic ::ns::a ::ns::b ::ns::c} {{making a} {running a b c} {running a b c} {making b} {running b c d} {making c} {running c d e} {unknown Magic - args = foo bar spong wibble}} {}}
+test namespace-47.2 {ensemble: unknown handler} {
+    namespace eval ns {
+	namespace export {[a-z]*}
+	proc Magic {ensemble subcmd args} {
+	    error foobar
+	}
+	namespace ensemble create -unknown ::ns::Magic
+    }
+    list [catch {ns spong} msg] $msg $::errorInfo [namespace delete ns]
+} {1 foobar {foobar
+    while executing
+"error foobar"
+    (procedure "::ns::Magic" line 2)
+    invoked from within
+"::ns::Magic ::ns spong"
+    (ensemble unknown subcommand handler)
+    invoked from within
+"ns spong"} {}}
+test namespace-47.3 {ensemble: unknown handler} {
+    namespace eval ns {
+	variable count 0
+	namespace export {[a-z]*}
+	proc a {} {}
+	proc c {} {}
+	proc Magic {ensemble subcmd args} {
+	    variable count
+	    incr count
+	    proc b {} {}
+	}
+	namespace ensemble create -unknown ::ns::Magic
+    }
+    list [catch {ns spong} msg] $msg $ns::count [namespace delete ns]
+} {1 {unknown or ambiguous subcommand "spong": must be a, b, or c} 1 {}}
+test namespace-47.4 {ensemble: unknown handler} {
+    namespace eval ns {
+	namespace export {[a-z]*}
+	proc Magic {ensemble subcmd args} {
+	    return -code break
+	}
+	namespace ensemble create -unknown ::ns::Magic
+    }
+    list [catch {ns spong} msg] $msg $::errorInfo [namespace delete ns]
+} {1 {unknown subcommand handler returned bad code: break} {unknown subcommand handler returned bad code: break
+    result of ensemble unknown subcommand handler: ::ns::Magic ::ns spong
+    invoked from within
+"ns spong"} {}}
+test namespace-47.5 {ensemble: unknown handler} {
+    namespace ensemble create -command foo -unknown bar
+    proc bar {args} {
+	global result target
+	lappend result "LOG $args"
+	return $target
+    }
+    set result {}
+    set target {}
+    lappend result [catch {foo bar} msg] $msg
+    set target {lappend result boo hoo}
+    lappend result [catch {foo bar} msg] $msg [namespace ensemble config foo]
+    rename foo {}
+    set result
+} {{LOG ::foo bar} 1 {unknown subcommand "bar": namespace :: does not export any commands} {LOG ::foo bar} boo hoo 0 {{LOG ::foo bar} 1 {unknown subcommand "bar": namespace :: does not export any commands} {LOG ::foo bar} boo hoo} {-map {} -namespace :: -parameters {} -prefixes 1 -subcommands {} -unknown bar}}
+test namespace-47.6 {ensemble: unknown handler} {
+    namespace ensemble create -command foo -unknown bar
+    proc bar {args} {
+	return "\{"
+    }
+    set result [list [catch {foo bar} msg] $msg $::errorInfo]
+    rename foo {}
+    set result
+} {1 {unmatched open brace in list} {unmatched open brace in list
+    while parsing result of ensemble unknown subcommand handler
+    invoked from within
+"foo bar"}}
+test namespace-47.7 {ensemble: unknown handler, commands with spaces} {
+    namespace ensemble create -command foo -unknown bar
+    proc bar {args} {
+	list ::set ::x [join $args |]
+    }
+    set result [foo {one two three}]
+    rename foo {}
+    set result
+} {::foo|one two three}
+test namespace-47.8 {ensemble: unknown handler, commands with spaces} {
+    namespace ensemble create -command foo -unknown {bar boo}
+    proc bar {args} {
+	list ::set ::x [join $args |]
+    }
+    set result [foo {one two three}]
+    rename foo {}
+    set result
+} {boo|::foo|one two three}
+
+test namespace-48.1 {ensembles and namespace import: unknown handler} {
+    namespace eval foo {
+	namespace export bar
+	namespace ensemble create -command bar -unknown ::foo::u -subcomm x
+	proc u {ens args} {
+	    global result
+	    lappend result $ens $args
+	    namespace ensemble config $ens -subcommand {x y}
+	}
+	proc u2 {ens args} {
+	    global result
+	    lappend result $ens $args
+	    namespace ensemble config ::bar -subcommand {x y z}
+	}
+	proc x args {
+	    global result
+	    lappend result XXX $args
+	}
+	proc y args {
+	    global result
+	    lappend result YYY $args
+	}
+	proc z args {
+	    global result
+	    lappend result ZZZ $args
+	}
+    }
+    namespace import -force foo::bar
+    set result [list [namespace ensemble config bar]]
+    bar x 123
+    bar y 456
+    namespace ensemble config bar -unknown ::foo::u2
+    bar z 789
+    namespace delete foo
+    set result
+} {{-map {} -namespace ::foo -parameters {} -prefixes 1 -subcommands x -unknown ::foo::u} XXX 123 ::foo::bar {y 456} YYY 456 ::foo::bar {z 789} ZZZ 789}
+test namespace-48.2 {ensembles and namespace import: exists} {
+    namespace eval foo {
+	namespace ensemble create -command ::foo::bar
+	namespace export bar
+    }
+    set result     [namespace ensemble exist foo::bar]
+    lappend result [namespace ensemble exist bar]
+    namespace import foo::bar
+    lappend result [namespace ensemble exist bar]
+    rename foo::bar foo::bar2
+    lappend result [namespace ensemble exist bar] \
+	    [namespace ensemble exist spong]
+    rename bar spong
+    lappend result [namespace ensemble exist bar] \
+	    [namespace ensemble exist spong]
+    rename foo::bar2 {}
+    lappend result [namespace ensemble exist spong]
+    namespace delete foo
+    set result
+} {1 0 1 1 0 0 1 0}
+test namespace-48.3 {ensembles and namespace import: config} {
+    catch {rename spong {}}
+    namespace eval foo {
+	namespace ensemble create -command ::foo::bar
+	namespace export bar boo
+	proc boo {} {}
+    }
+    namespace import foo::bar foo::boo
+    set result [namespace ensemble config bar -namespace]
+    lappend result [catch {namespace ensemble config boo} msg] $msg
+    lappend result [catch {namespace ensemble config spong} msg] $msg
+    namespace delete foo
+    set result
+} {::foo 1 {"boo" is not an ensemble command} 1 {unknown command "spong"}}
+
+test namespace-49.1 {ensemble subcommand caching} -body {
+    namespace ens cre -command a -map {b {lappend result 1}}
+    namespace ens cre -command c -map {b {lappend result 2}}
+    proc x {} {a b; c b; a b; c b}
+    x
+} -result {1 2 1 2} -cleanup {
+    rename a {}
+    rename c {}
+    rename x {}
+}
+test namespace-49.2 {strange delete crash} -body {
+    namespace eval foo {namespace ensemble create -command ::bar}
+    trace add command ::bar delete DeleteTrace
+    proc DeleteTrace {old new op} {
+	trace remove command ::bar delete DeleteTrace
+	rename $old ""
+	# This next line caused a bus error in [Bug 1220058]
+	namespace delete foo
+    }
+    rename ::bar ""
+} -result "" -cleanup {
+    rename DeleteTrace ""
+}
+
+test namespace-50.1 {ensembles affect proc arguments error messages} -body {
+    namespace ens cre -command a -map {b {bb foo}}
+    proc bb {c d {e f} args} {list $c $args}
+    a b
+} -returnCodes error -result "wrong # args: should be \"a b d ?e? ?arg ...?\"" -cleanup {
+    rename a {}
+    rename bb {}
+}
+test namespace-50.2 {ensembles affect WrongNumArgs error messages} -body {
+    namespace ens cre -command a -map {b {string is}}
+    a b boolean
+} -returnCodes error -result "wrong # args: should be \"a b class ?-strict? ?-failindex var? str\"" -cleanup {
+    rename a {}
+}
+test namespace-50.3 {chained ensembles affect error messages} -body {
+    namespace ens cre -command a -map {b c}
+    namespace ens cre -command c -map {d e}
+    proc e f {}
+    a b d
+} -returnCodes error -result "wrong # args: should be \"a b d f\"" -cleanup {
+    rename a {}
+    rename c {}
+}
+test namespace-50.4 {chained ensembles affect error messages} -body {
+    namespace ens cre -command a -map {b {c d}}
+    namespace ens cre -command c -map {d {e f}}
+    proc e f {}
+    a b d
+} -returnCodes error -result "wrong # args: should be \"a b\"" -cleanup {
+    rename a {}
+    rename c {}
+}
+test namespace-50.5 {[4402cfa58c]} -setup {
+    proc bar {ev} {}
+    proc bingo {xx} {}
+    namespace ensemble create -command launch -map {foo bar event bingo}
+    set result {}
+} -body {
+    catch {launch foo} m; lappend result $m
+    catch {launch ev} m; lappend result $m
+    catch {launch foo} m; lappend result $m
+} -cleanup {
+    rename launch {}
+    rename bingo {}
+    rename bar {}
+} -result {{wrong # args: should be "launch foo ev"} {wrong # args: should be "launch event xx"} {wrong # args: should be "launch foo ev"}}
+test namespace-50.6 {[4402cfa58c]} -setup {
+    proc target {x y} {}
+    namespace ensemble create -command e2 -map {s2 target}
+    namespace ensemble create -command e1 -map {s1 e2}
+    set result {}
+} -body {
+    set s s
+    catch {e1 s1 s2 a} m; lappend result $m
+    catch {e1 $s s2 a} m; lappend result $m
+    catch {e1 s1 $s a} m; lappend result $m
+    catch {e1 $s $s a} m; lappend result $m
+} -cleanup {
+    rename e1 {}
+    rename e2 {}
+    rename target {}
+} -result {{wrong # args: should be "e1 s1 s2 x y"} {wrong # args: should be "e1 s1 s2 x y"} {wrong # args: should be "e1 s1 s2 x y"} {wrong # args: should be "e1 s1 s2 x y"}}
+test namespace-50.7 {[4402cfa58c]} -setup {
+    proc target {x y} {}
+    namespace ensemble create -command e2 -map {s2 target}
+    namespace ensemble create -command e1 -map {s1 e2} -parameters foo
+    set result {}
+} -body {
+    set s s
+    catch {e1 s2 s1 a} m; lappend result $m
+    catch {e1 $s s1 a} m; lappend result $m
+    catch {e1 s2 $s a} m; lappend result $m
+    catch {e1 $s $s a} m; lappend result $m
+} -cleanup {
+    rename e1 {}
+    rename e2 {}
+    rename target {}
+} -result {{wrong # args: should be "e1 s2 s1 x y"} {wrong # args: should be "e1 s2 s1 x y"} {wrong # args: should be "e1 s2 s1 x y"} {wrong # args: should be "e1 s2 s1 x y"}}
+test namespace-50.8 {[f961d7d1dd]} -setup {
+    proc target {} {}
+    namespace ensemble create -command e -map {s target} -parameters {{a b}}
+} -body {
+    e
+} -returnCodes error -result {wrong # args: should be "e {a b} subcommand ?arg ...?"} -cleanup {
+    rename e {}
+    rename target {}
+}
+test namespace-50.9 {[cea0344a51]} -body {
+    namespace eval foo {
+	namespace eval bar {
+	    namespace delete foo
+	}
+    }
+} -returnCodes error -result {unknown namespace "foo" in namespace delete command}
+
+test namespace-51.1 {name resolution path control} -body {
+    namespace eval ::test_ns_1 {
+	namespace eval test_ns_2 {
+	    proc pathtestA {} {
+		::return [pathtestB],[pathtestC],[pathtestD],[namespace path]
+	    }
+	    proc pathtestC {} {
+		::return 2
+	    }
+	}
+	proc pathtestB {} {
+	    return 1
+	}
+	proc pathtestC {} {
+	    return 1
+	}
+	namespace path ::test_ns_1
+    }
+    proc ::pathtestB {} {
+	return global
+    }
+    proc ::pathtestD {} {
+	return global
+    }
+    test_ns_1::test_ns_2::pathtestA
+} -result "global,2,global," -cleanup {
+    namespace delete ::test_ns_1
+    catch {rename ::pathtestB {}}
+    catch {rename ::pathtestD {}}
+}
+test namespace-51.2 {name resolution path control} -body {
+    namespace eval ::test_ns_1 {
+	namespace eval test_ns_2 {
+	    namespace path ::test_ns_1
+	    proc pathtestA {} {
+		::return [pathtestB],[pathtestC],[pathtestD],[namespace path]
+	    }
+	    proc pathtestC {} {
+		::return 2
+	    }
+	}
+	proc pathtestB {} {
+	    return 1
+	}
+	proc pathtestC {} {
+	    return 1
+	}
+    }
+    proc ::pathtestB {} {
+	return global
+    }
+    proc ::pathtestD {} {
+	return global
+    }
+    ::test_ns_1::test_ns_2::pathtestA
+} -result "1,2,global,::test_ns_1" -cleanup {
+    namespace delete ::test_ns_1
+    catch {rename ::pathtestB {}}
+    catch {rename ::pathtestD {}}
+}
+test namespace-51.3 {name resolution path control} -body {
+    namespace eval ::test_ns_1 {
+	namespace eval test_ns_2 {
+	    proc pathtestA {} {
+		::return [pathtestB],[pathtestC],[pathtestD],[namespace path]
+	    }
+	    proc pathtestC {} {
+		::return 2
+	    }
+	}
+	proc pathtestB {} {
+	    return 1
+	}
+	proc pathtestC {} {
+	    return 1
+	}
+    }
+    proc ::pathtestB {} {
+	return global
+    }
+    proc ::pathtestD {} {
+	return global
+    }
+    set result [::test_ns_1::test_ns_2::pathtestA]
+    namespace eval ::test_ns_1::test_ns_2 {
+	namespace path ::test_ns_1
+    }
+    lappend result [::test_ns_1::test_ns_2::pathtestA]
+    rename ::test_ns_1::pathtestB {}
+    lappend result [::test_ns_1::test_ns_2::pathtestA]
+} -result "global,2,global, 1,2,global,::test_ns_1 global,2,global,::test_ns_1" -cleanup {
+    namespace delete ::test_ns_1
+    catch {rename ::pathtestB {}}
+    catch {rename ::pathtestD {}}
+}
+test namespace-51.4 {name resolution path control} -body {
+    namespace eval ::test_ns_1 {
+	namespace eval test_ns_2 {
+	    proc pathtestA {} {
+		::return [pathtestB],[pathtestC],[pathtestD],[namespace path]
+	    }
+	    proc pathtestC {} {
+		::return 2
+	    }
+	}
+	proc pathtestB {} {
+	    return 1
+	}
+	proc pathtestC {} {
+	    return 1
+	}
+    }
+    proc ::pathtestB {} {
+	return global
+    }
+    proc ::pathtestD {} {
+	return global
+    }
+    set result [::test_ns_1::test_ns_2::pathtestA]
+    namespace eval ::test_ns_1::test_ns_2 {
+	namespace path ::test_ns_1
+    }
+    lappend result [::test_ns_1::test_ns_2::pathtestA]
+    namespace eval ::test_ns_1::test_ns_2 {
+	namespace path {}
+    }
+    lappend result [::test_ns_1::test_ns_2::pathtestA]
+} -result "global,2,global, 1,2,global,::test_ns_1 global,2,global," -cleanup {
+    namespace delete ::test_ns_1
+    catch {rename ::pathtestB {}}
+    catch {rename ::pathtestD {}}
+}
+test namespace-51.5 {name resolution path control} -body {
+    namespace eval ::test_ns_1 {
+	namespace eval test_ns_2 {
+	    proc pathtestA {} {
+		::return [pathtestB],[pathtestC],[pathtestD],[namespace path]
+	    }
+	    proc pathtestC {} {
+		::return 2
+	    }
+	    namespace path ::test_ns_1
+	}
+	proc pathtestB {} {
+	    return 1
+	}
+	proc pathtestC {} {
+	    return 1
+	}
+	proc pathtestD {} {
+	    return 1
+	}
+    }
+    proc ::pathtestB {} {
+	return global
+    }
+    proc ::pathtestD {} {
+	return global
+    }
+    set result [::test_ns_1::test_ns_2::pathtestA]
+    namespace eval ::test_ns_1::test_ns_2 {
+	namespace path {:: ::test_ns_1}
+    }
+    lappend result [::test_ns_1::test_ns_2::pathtestA]
+    rename ::test_ns_1::test_ns_2::pathtestC {}
+    lappend result [::test_ns_1::test_ns_2::pathtestA]
+} -result "1,2,1,::test_ns_1 {global,2,global,:: ::test_ns_1} {global,1,global,:: ::test_ns_1}" -cleanup {
+    namespace delete ::test_ns_1
+    catch {rename ::pathtestB {}}
+    catch {rename ::pathtestD {}}
+}
+test namespace-51.6 {name resolution path control} -body {
+    namespace eval ::test_ns_1 {
+	namespace eval test_ns_2 {
+	    proc pathtestA {} {
+		::return [pathtestB],[pathtestC],[pathtestD],[namespace path]
+	    }
+	    proc pathtestC {} {
+		::return 2
+	    }
+	    namespace path ::test_ns_1
+	}
+	proc pathtestB {} {
+	    return 1
+	}
+	proc pathtestC {} {
+	    return 1
+	}
+	proc pathtestD {} {
+	    return 1
+	}
+    }
+    proc ::pathtestB {} {
+	return global
+    }
+    proc ::pathtestD {} {
+	return global
+    }
+    set result [::test_ns_1::test_ns_2::pathtestA]
+    namespace eval ::test_ns_1::test_ns_2 {
+	namespace path {:: ::test_ns_1}
+    }
+    lappend result [::test_ns_1::test_ns_2::pathtestA]
+    rename ::test_ns_1::test_ns_2::pathtestC {}
+    lappend result [::test_ns_1::test_ns_2::pathtestA]
+    proc ::pathtestC {} {
+	return global
+    }
+    lappend result [::test_ns_1::test_ns_2::pathtestA]
+} -result "1,2,1,::test_ns_1 {global,2,global,:: ::test_ns_1} {global,1,global,:: ::test_ns_1} {global,global,global,:: ::test_ns_1}" -cleanup {
+    namespace delete ::test_ns_1
+    catch {rename ::pathtestB {}}
+    catch {rename ::pathtestD {}}
+}
+test namespace-51.7 {name resolution path control} -body {
+    namespace eval ::test_ns_1 {
+    }
+    namespace eval ::test_ns_2 {
+	namespace path ::test_ns_1
+	proc getpath {} {namespace path}
+    }
+    list [::test_ns_2::getpath] [namespace delete ::test_ns_1] [::test_ns_2::getpath]
+} -result {::test_ns_1 {} {}} -cleanup {
+    catch {namespace delete ::test_ns_1}
+    namespace delete ::test_ns_2
+}
+test namespace-51.8 {name resolution path control} -body {
+    namespace eval ::test_ns_1 {
+    }
+    namespace eval ::test_ns_2 {
+    }
+    namespace eval ::test_ns_3 {
+    }
+    namespace eval ::test_ns_4 {
+	namespace path {::test_ns_1 ::test_ns_2 ::test_ns_3}
+	proc getpath {} {namespace path}
+    }
+    list [::test_ns_4::getpath] [namespace delete ::test_ns_2] [::test_ns_4::getpath]
+} -result {{::test_ns_1 ::test_ns_2 ::test_ns_3} {} {::test_ns_1 ::test_ns_3}} -cleanup {
+    catch {namespace delete ::test_ns_1}
+    catch {namespace delete ::test_ns_2}
+    catch {namespace delete ::test_ns_3}
+    catch {namespace delete ::test_ns_4}
+}
+test namespace-51.9 {name resolution path control} -body {
+    namespace eval ::test_ns_1 {
+    }
+    namespace eval ::test_ns_2 {
+    }
+    namespace eval ::test_ns_3 {
+    }
+    namespace eval ::test_ns_4 {
+	namespace path {::test_ns_1 ::test_ns_2 ::test_ns_3}
+	proc getpath {} {namespace path}
+    }
+    list [::test_ns_4::getpath] [namespace delete ::test_ns_2] [namespace eval ::test_ns_2 {}] [::test_ns_4::getpath]
+} -result {{::test_ns_1 ::test_ns_2 ::test_ns_3} {} {} {::test_ns_1 ::test_ns_3}} -cleanup {
+    catch {namespace delete ::test_ns_1}
+    catch {namespace delete ::test_ns_2}
+    catch {namespace delete ::test_ns_3}
+    catch {namespace delete ::test_ns_4}
+}
+test namespace-51.10 {name resolution path control} -body {
+    namespace eval ::test_ns_1 {
+	namespace path does::not::exist
+    }
+} -returnCodes error -result {namespace "does::not::exist" not found in "::test_ns_1"} -cleanup {
+    catch {namespace delete ::test_ns_1}
+}
+test namespace-51.11 {name resolution path control} -body {
+    namespace eval ::test_ns_1 {
+	proc foo {} {return 1}
+    }
+    namespace eval ::test_ns_2 {
+	proc foo {} {return 2}
+    }
+    namespace eval ::test_ns_3 {
+	namespace path ::test_ns_1
+    }
+    namespace eval ::test_ns_4 {
+	namespace path {::test_ns_3 ::test_ns_2}
+	foo
+    }
+} -result 2 -cleanup {
+    catch {namespace delete ::test_ns_1}
+    catch {namespace delete ::test_ns_2}
+    catch {namespace delete ::test_ns_3}
+    catch {namespace delete ::test_ns_4}
+}
+test namespace-51.12 {name resolution path control} -body {
+    namespace eval ::test_ns_1 {
+	proc foo {} {return 1}
+    }
+    namespace eval ::test_ns_2 {
+	proc foo {} {return 2}
+    }
+    namespace eval ::test_ns_3 {
+	namespace path ::test_ns_1
+    }
+    namespace eval ::test_ns_4 {
+	namespace path {::test_ns_3 ::test_ns_2}
+	list [foo] [namespace delete ::test_ns_3] [foo]
+    }
+} -result {2 {} 2} -cleanup {
+    catch {namespace delete ::test_ns_1}
+    catch {namespace delete ::test_ns_2}
+    catch {namespace delete ::test_ns_3}
+    catch {namespace delete ::test_ns_4}
+}
+test namespace-51.13 {name resolution path control} -body {
+    set ::result {}
+    namespace eval ::test_ns_1 {
+	proc foo {} {lappend ::result 1}
+    }
+    namespace eval ::test_ns_2 {
+	proc foo {} {lappend ::result 2}
+	trace add command foo delete "namespace eval ::test_ns_3 foo;#"
+    }
+    namespace eval ::test_ns_3 {
+	proc foo {} {
+	    lappend ::result 3
+	    namespace delete [namespace current]
+	    ::test_ns_4::bar
+	}
+    }
+    namespace eval ::test_ns_4 {
+	namespace path {::test_ns_2 ::test_ns_3 ::test_ns_1}
+	proc bar {} {
+	    list [foo] [namespace delete ::test_ns_2] [foo]
+	}
+	bar
+    }
+    # Should the result be "2 {} {2 3 2 1}" instead?
+} -result {2 {} {2 3 1 1}} -cleanup {
+    catch {namespace delete ::test_ns_1}
+    catch {namespace delete ::test_ns_2}
+    catch {namespace delete ::test_ns_3}
+    catch {namespace delete ::test_ns_4}
+}
+test namespace-51.14 {name resolution path control} -setup {
+    foreach cmd [info commands foo*] {
+	rename $cmd {}
+    }
+    namespace eval ::test_ns_1 {}
+    namespace eval ::test_ns_2 {}
+    namespace eval ::test_ns_3 {}
+} -body {
+    proc foo0 {} {}
+    proc ::test_ns_1::foo1 {} {}
+    proc ::test_ns_2::foo2 {} {}
+    namespace eval ::test_ns_3 {
+	variable result {}
+	lappend result [info commands foo*]
+	namespace path {::test_ns_1 ::test_ns_2}
+	lappend result [info commands foo*]
+	proc foo2 {} {}
+	lappend result [info commands foo*]
+	rename foo2 {}
+	lappend result [info commands foo*]
+	namespace delete ::test_ns_1
+	lappend result [info commands foo*]
+    }
+} -cleanup {
+    catch {namespace delete ::test_ns_1}
+    catch {namespace delete ::test_ns_2}
+    catch {namespace delete ::test_ns_3}
+} -result {foo0 {foo1 foo2 foo0} {foo2 foo1 foo0} {foo1 foo2 foo0} {foo2 foo0}}
+test namespace-51.15 {namespace resolution path control} -body {
+    namespace eval ::test_ns_2 {
+	proc foo {} {return 2}
+    }
+    namespace eval ::test_ns_1 {
+	namespace eval test_ns_2 {
+	    proc foo {} {return 1_2}
+	}
+	namespace eval test_ns_3 {
+	    namespace path ::test_ns_1
+	    test_ns_2::foo
+	}
+    }
+} -result 1_2 -cleanup {
+    namespace delete ::test_ns_1
+    namespace delete ::test_ns_2
+}
+test namespace-51.16 {Bug 1566526} {
+    interp create slave
+    slave eval namespace eval demo namespace path ::
+    interp delete slave
+} {}
+test namespace-51.17 {resolution epoch handling: Bug 2898722} -setup {
+    set result {}
+    catch {namespace delete ::a}
+} -body {
+    namespace eval ::a {
+	proc c {} {lappend ::result A}
+	c
+	namespace eval b {
+	    variable d c
+	    lappend ::result [catch { $d }]
+	}
+	lappend ::result .
+	namespace eval b {
+	    namespace path [namespace parent]
+	    $d;[format %c 99]
+	}
+	lappend ::result .
+	namespace eval b {
+	    proc c {} {lappend ::result B}
+	    $d;[format %c 99]
+	}
+	lappend ::result .
+    }
+    namespace eval ::a::b {
+	$d;[format %c 99]
+	lappend ::result .
+	proc ::c {} {lappend ::result G}
+	$d;[format %c 99]
+	lappend ::result .
+	rename ::a::c {}
+	$d;[format %c 99]
+	lappend ::result .
+	rename ::a::b::c {}
+	$d;[format %c 99]
+    }
+} -cleanup {
+    namespace delete ::a
+    catch {rename ::c {}}
+    unset result
+} -result {A 1 . A A . B B . B B . B B . B B . G G}
+test namespace-51.18 {Bug 3185407} -setup {
+    namespace eval ::test_ns_1 {}
+} -body {
+    namespace eval ::test_ns_1 {
+	variable result {}
+	namespace eval ns {proc foo {} {}}
+	namespace eval ns2 {proc foo {} {}}
+	namespace path {ns ns2}
+	variable x foo
+	lappend result [namespace which $x]
+	proc foo {} {}
+	lappend result [namespace which $x]
+    }
+} -cleanup {
+    namespace delete ::test_ns_1
+} -result {::test_ns_1::ns::foo ::test_ns_1::foo}
+
+# TIP 181 - namespace unknown tests
+test namespace-52.1 {unknown: default handler ::unknown} {
+    set result [list [namespace eval foobar { namespace unknown }]]
+    lappend result [namespace eval :: { namespace unknown }]
+    namespace delete foobar
+    set result
+} {{} ::unknown}
+test namespace-52.2 {unknown: default resolution global} {
+    proc ::foo {} { return "GLOBAL" }
+    namespace eval ::bar { proc foo {} { return "NAMESPACE" } }
+    namespace eval ::bar::jim { proc test {} { foo } }
+    set result [::bar::jim::test]
+    namespace delete ::bar
+    rename ::foo {}
+    set result
+} {GLOBAL}
+test namespace-52.3 {unknown: default resolution local} {
+    proc ::foo {} { return "GLOBAL" }
+    namespace eval ::bar {
+	proc foo {} { return "NAMESPACE" }
+	proc test {} { foo }
+    }
+    set result [::bar::test]
+    namespace delete ::bar
+    rename ::foo {}
+    set result
+} {NAMESPACE}
+test namespace-52.4 {unknown: set handler} {
+    namespace eval foo {
+	namespace unknown [list dispatch]
+	proc dispatch {args} { return $args }
+	proc test {} {
+	    UnknownCmd a b c
+	}
+    }
+    set result [foo::test]
+    namespace delete foo
+    set result
+} {UnknownCmd a b c}
+test namespace-52.5 {unknown: search path before unknown is unaltered} {
+    proc ::test2 {args} { return "TEST2: $args" }
+    namespace eval foo {
+	namespace unknown [list dispatch]
+	proc dispatch {args} { return "UNKNOWN: $args" }
+	proc test1 {args} { return "TEST1: $args" }
+	proc test {} {
+	    set result [list [test1 a b c]]
+	    lappend result [test2 a b c]
+	    lappend result [test3 a b c]
+	    return $result
+	}
+    }
+    set result [foo::test]
+    namespace delete foo
+    rename ::test2 {}
+    set result
+} {{TEST1: a b c} {TEST2: a b c} {UNKNOWN: test3 a b c}}
+test namespace-52.6 {unknown: deleting handler restores default} {
+    rename ::unknown ::_unknown_orig
+    proc ::unknown {args} { return "DEFAULT: $args" }
+    namespace eval foo {
+	namespace unknown dummy
+	namespace unknown {}
+    }
+    set result [namespace eval foo { dummy a b c }]
+    rename ::unknown {}
+    rename ::_unknown_orig ::unknown
+    namespace delete foo
+    set result
+} {DEFAULT: dummy a b c}
+test namespace-52.7 {unknown: setting global unknown handler} {
+    proc ::myunknown {args} { return "MYUNKNOWN: $args" }
+    namespace eval :: { namespace unknown ::myunknown }
+    set result [namespace eval foo { dummy a b c }]
+    namespace eval :: { namespace unknown {} }
+    rename ::myunknown {}
+    namespace delete foo
+    set result
+} {MYUNKNOWN: dummy a b c}
+test namespace-52.8 {unknown: destroying and redefining global namespace} {
+    set i [interp create]
+    $i hide proc
+    $i hide namespace
+    $i hide return
+    $i invokehidden namespace delete ::
+    $i expose return
+    $i invokehidden proc unknown args { return "FINE" }
+    $i eval { foo bar bob }
+} {FINE}
+test namespace-52.9 {unknown: refcounting} -setup {
+    proc this args {
+	unset args		;# stop sharing
+	set copy [namespace unknown]
+	string length $copy	;# shimmer away list rep
+	info level 0
+    }
+    set handler [namespace unknown]
+    namespace unknown {this is a test}
+    catch {rename noSuchCommand {}}
+} -body {
+    noSuchCommand
+} -cleanup {
+    namespace unknown $handler
+    rename this {}
+} -result {this is a test noSuchCommand}
+testConstraint testevalobjv [llength [info commands testevalobjv]]
+test namespace-52.10 {unknown: with TCL_EVAL_GLOBAL} -constraints {
+    testevalobjv
+} -setup {
+    rename ::unknown unknown.save
+    proc ::unknown args {
+	set caller [uplevel 1 {namespace current}]
+	namespace eval $caller {
+	    variable foo
+	    return $foo
+	}
+    }
+    catch {rename ::noSuchCommand {}}
+} -body {
+    namespace eval :: {
+	variable foo SUCCESS
+    }
+    namespace eval test_ns_1 {
+	variable foo FAIL
+	testevalobjv 1 noSuchCommand
+    }
+} -cleanup {
+    unset -nocomplain ::foo
+    namespace delete test_ns_1
+    rename ::unknown {}
+    rename unknown.save ::unknown
+} -result SUCCESS
+test namespace-52.11 {unknown: with TCL_EVAL_INVOKE} -setup {
+    set handler [namespace eval :: {namespace unknown}]
+    namespace eval :: {namespace unknown unknown}
+    rename ::unknown unknown.save
+    namespace eval :: {
+	proc unknown args {
+	    return SUCCESS
+	}
+    }
+    catch {rename ::noSuchCommand {}}
+    set ::slave [interp create]
+} -body {
+    $::slave alias bar noSuchCommand
+    namespace eval test_ns_1 {
+	namespace unknown unknown
+	proc unknown args {
+	    return FAIL
+	}
+	$::slave eval bar
+    }
+} -cleanup {
+    interp delete $::slave
+    unset ::slave
+    namespace delete test_ns_1
+    rename ::unknown {}
+    rename unknown.save ::unknown
+    namespace eval :: [list namespace unknown $handler]
+} -result SUCCESS
+test namespace-52.12 {unknown: error case must not reset handler} -body {
+    namespace eval foo {
+	namespace unknown ok
+	catch {namespace unknown {{}{}{}}}
+	namespace unknown
+    }
+} -cleanup {
+    namespace delete foo
+} -result ok
+
+# TIP 314 - ensembles with parameters
+test namespace-53.1 {ensembles: parameters} {
+    namespace eval ns {
+	namespace export x
+	proc x {para} {list 1 $para}
+	namespace ensemble create -parameters {para1}
+    }
+    list [info command ns] [ns bar x] [namespace delete ns] [info command ns]
+} {ns {1 bar} {} {}}
+test namespace-53.2 {ensembles: parameters} -setup {
+    namespace eval ns {
+	namespace export x
+	proc x {para} {list 1 $para}
+	namespace ensemble create
+    }
+} -body {
+    namespace ensemble configure ns -parameters {para1}
+    rename ns foo
+    list [info command foo] [foo bar x] [namespace delete ns] [info command foo]
+} -result {foo {1 bar} {} {}}
+test namespace-53.3 {ensembles: parameters} -setup {
+    namespace eval ns {
+	namespace export x*
+	proc x1 {para} {list 1 $para}
+	proc x2 {para} {list 2 $para}
+	namespace ensemble create -parameters param1
+    }
+} -body {
+    set result [list [ns x2 x1] [ns x1 x2]]
+    lappend result [catch {ns x} msg] $msg
+    lappend result [catch {ns x x} msg] $msg
+    rename ns {}
+    lappend result [info command ns::x1]
+    namespace delete ns
+    lappend result [info command ns::x1]
+} -result\
+   {{1 x2} {2 x1}\
+    1 {wrong # args: should be "ns param1 subcommand ?arg ...?"}\
+    1 {unknown or ambiguous subcommand "x": must be x1, or x2}\
+    ::ns::x1 {}}
+test namespace-53.4 {ensembles: parameters} -setup {
+    namespace eval ns {
+	namespace export x*
+	proc x1 {a1 a2} {list 1 $a1 $a2}
+	proc x2 {a1 a2} {list 2 $a1 $a2}
+	proc x3 {a1 a2} {list 3 $a1 $a2}
+	namespace ensemble create
+    }
+} -body {
+    set result {}
+    lappend result [ns x1 x2 x3]
+    namespace ensemble configure ns -parameters p1
+    lappend result [ns x1 x2 x3]
+    namespace ensemble configure ns -parameters {p1 p2}
+    lappend result [ns x1 x2 x3]
+} -cleanup {
+    namespace delete ns
+} -result {{1 x2 x3} {2 x1 x3} {3 x1 x2}}
+test namespace-53.5 {ensembles: parameters} -setup {
+    namespace eval ns {
+	namespace export x*
+	proc x1 {para} {list 1 $para}
+	proc x2 {para} {list 2 $para}
+	proc x3 {para} {list 3 $para}
+	namespace ensemble create
+    }
+} -body {
+    set result [list [catch {ns x x1} msg] $msg]
+    lappend result [catch {ns x1 x} msg] $msg
+    namespace ensemble configure ns -parameters p1
+    lappend result [catch {ns x1 x} msg] $msg
+    lappend result [catch {ns x x1} msg] $msg
+} -cleanup {
+    namespace delete ns
+} -result\
+   {1 {unknown or ambiguous subcommand "x": must be x1, x2, or x3}\
+    0 {1 x}\
+    1 {unknown or ambiguous subcommand "x": must be x1, x2, or x3}\
+    0 {1 x}}
+test namespace-53.6 {ensembles: nested} -setup {
+    namespace eval ns {
+	namespace export x*
+	namespace eval x0 {
+	    proc z {args} {list 0 $args}
+	    namespace export z
+	    namespace ensemble create
+	}
+	proc x1 {args} {list 1 $args}
+	proc x2 {args} {list 2 $args}
+	proc x3 {args} {list 3 $args}
+	namespace ensemble create -parameters p
+    }
+} -body {
+    list [ns z x0] [ns z x1] [ns z x2] [ns z x3]
+} -cleanup {
+    namespace delete ns
+} -result {{0 {}} {1 z} {2 z} {3 z}}
+test namespace-53.7 {ensembles: parameters & wrong # args} -setup {
+    namespace eval ns {
+	namespace export x*
+	proc x1 {a1 a2 a3 a4} {list x1 $a1 $a2 $a3 $a4}
+	namespace ensemble create -parameters p1
+    }
+} -body {
+    set result {}
+    lappend result [catch {ns} msg] $msg
+    lappend result [catch {ns x1} msg] $msg
+    lappend result [catch {ns x1 x1} msg] $msg
+    lappend result [catch {ns x1 x1 x1} msg] $msg
+    lappend result [catch {ns x1 x1 x1 x1} msg] $msg
+    lappend result [catch {ns x1 x1 x1 x1 x1} msg] $msg
+} -cleanup {
+    namespace delete ns
+} -result\
+   {1 {wrong # args: should be "ns p1 subcommand ?arg ...?"}\
+    1 {wrong # args: should be "ns p1 subcommand ?arg ...?"}\
+    1 {wrong # args: should be "ns x1 x1 a2 a3 a4"}\
+    1 {wrong # args: should be "ns x1 x1 a2 a3 a4"}\
+    1 {wrong # args: should be "ns x1 x1 a2 a3 a4"}\
+    0 {x1 x1 x1 x1 x1}}
+test namespace-53.8 {ensemble: unknown handler changing -parameters} -setup {
+    namespace eval ns {
+	namespace export x*
+	proc x1 {a1} {list 1 $a1}
+	proc Magic {ensemble subcmd args} {
+	    namespace ensemble configure $ensemble\
+              -parameters [lrange p1 [llength [
+                namespace ensemble configure $ensemble -parameters
+              ]] 0]
+            list
+	}
+	namespace ensemble create -unknown ::ns::Magic
+    }
+} -body {
+    set result {}
+    lappend result [catch {ns x1 x2} msg] $msg [namespace ensemble configure ns -parameters]
+    lappend result [catch {ns x2 x1} msg] $msg [namespace ensemble configure ns -parameters]
+    lappend result [catch {ns x2 x3} msg] $msg [namespace ensemble configure ns -parameters]
+} -cleanup {
+    namespace delete ns
+} -result\
+   {0 {1 x2} {}\
+    0 {1 x2} p1\
+    1 {unknown or ambiguous subcommand "x2": must be x1} {}}
+test namespace-53.9 {ensemble: unknown handler changing -parameters,\
+  thereby eating all args} -setup {
+    namespace eval ns {
+	namespace export x*
+	proc x1 {args} {list 1 $args}
+	proc Magic {ensemble subcmd args} {
+	    namespace ensemble configure $ensemble\
+              -parameters {p1 p2 p3 p4 p5}
+            list
+	}
+	namespace ensemble create -unknown ::ns::Magic
+    }
+} -body {
+    set result {}
+    lappend result [catch {ns x1 x2} msg] $msg [namespace ensemble configure ns -parameters]
+    lappend result [catch {ns x2 x1} msg] $msg [namespace ensemble configure ns -parameters]
+    lappend result [catch {ns a1 a2 a3 a4 a5 x1} msg] $msg [namespace ensemble configure ns -parameters]
+} -cleanup {
+    namespace delete ns
+} -result\
+   {0 {1 x2} {}\
+    1 {wrong # args: should be "ns p1 p2 p3 p4 p5 subcommand ?arg ...?"} {p1 p2 p3 p4 p5}\
+    0 {1 {a1 a2 a3 a4 a5}} {p1 p2 p3 p4 p5}}
+test namespace-53.10 {ensembles: nested rewrite} -setup {
+    namespace eval ns {
+	namespace export x
+	namespace eval x {
+	    proc z0 {} {list 0}
+	    proc z1 {a1} {list 1 $a1}
+	    proc z2 {a1 a2} {list 2 $a1 $a2}
+	    proc z3 {a1 a2 a3} {list 3 $a1 $a2 $a3}
+	    namespace export z*
+	    namespace ensemble create
+	}
+	namespace ensemble create -parameters p
+    }
+} -body {
+    set result {}
+    # In these cases, parsing the subensemble does not grab a new word.
+    lappend result [catch {ns z0 x} msg] $msg
+    lappend result [catch {ns z1 x} msg] $msg
+    lappend result [catch {ns z2 x} msg] $msg
+    lappend result [catch {ns z2 x v} msg] $msg
+    namespace ensemble configure ns::x -parameters q1
+    # In these cases, parsing the subensemble grabs a new word.
+    lappend result [catch {ns v x z0} msg] $msg
+    lappend result [catch {ns v x z1} msg] $msg
+    lappend result [catch {ns v x z2} msg] $msg
+    lappend result [catch {ns v x z2 v2} msg] $msg
+} -cleanup {
+    namespace delete ns
+} -result\
+   {0 0\
+    1 {wrong # args: should be "ns z1 x a1"}\
+    1 {wrong # args: should be "ns z2 x a1 a2"}\
+    1 {wrong # args: should be "ns z2 x a1 a2"}\
+    1 {wrong # args: should be "z0"}\
+    0 {1 v}\
+    1 {wrong # args: should be "ns v x z2 a2"}\
+    0 {2 v v2}}
+test namespace-53.11 {ensembles: nested rewrite} -setup {
+    namespace eval ns {
+	namespace export x
+	namespace eval x {
+	    proc z2 {a1 a2} {list 2 $a1 $a2}
+	    namespace export z*
+	    namespace ensemble create -parameter p
+	}
+	namespace ensemble create
+    }
+} -body {
+    list [catch {ns x 1 z2} msg] $msg
+} -cleanup {
+    namespace delete ns
+    unset -nocomplain msg
+} -result {1 {wrong # args: should be "ns x 1 z2 a2"}}
+
+test namespace-54.1 {leak on namespace deletion} -constraints {memory} \
+-setup {
+    proc getbytes {} {
+	set lines [split [memory info] "\n"]
+	lindex $lines 3 3
+    }
+} -body {
+    set end [getbytes]
+    for {set i 0} {$i < 5} {incr i} {
+	set ns ::y$i
+	namespace eval $ns {}
+	namespace delete $ns
+	set start $end
+	set end [getbytes]
+    }
+    set leakedBytes [expr {$end - $start}]
+} -cleanup {
+    rename getbytes {}
+    unset i ns start end
+} -result 0
+
+test namespace-55.1 {compiled ensembles inside compiled ensembles: Bug 6d2f249a01} {
+    info class [format %s constructor] oo::object
+} ""
+
+test namespace-56.1 {bug f97d4ee020: mutually-entangled deletion} {
+    namespace eval ::testing {
+	proc abc {} {}
+	proc def {} {}
+	trace add command abc delete "rename ::testing::def {}; #"
+	trace add command def delete "rename ::testing::abc {}; #"
+    }
+    namespace delete ::testing
+} {}
+test namespace-56.2 {bug f97d4ee020: mutually-entangled deletion} {
+    namespace eval ::testing {
+	namespace eval abc {proc xyz {} {}}
+	namespace eval def {proc xyz {} {}}
+	trace add command abc::xyz delete "namespace delete ::testing::def {}; #"
+	trace add command def::xyz delete "namespace delete ::testing::abc {}; #"
+    }
+    namespace delete ::testing
+} {}
+test namespace-56.3 {bug f97d4ee020: mutually-entangled deletion} {
+    namespace eval ::testing {
+	variable gone {}
+	oo::class create CB {
+	    variable cmd
+	    constructor other {set cmd $other}
+	    destructor {rename $cmd {}; lappend ::testing::gone $cmd}
+	}
+	namespace eval abc {
+	    ::testing::CB create def ::testing::abc::ghi
+	    ::testing::CB create ghi ::testing::abc::def
+	}
+	namespace delete abc
+	try {
+	    return [lsort $gone]
+	} finally {
+	    namespace delete ::testing
+	}
+    }
+} {::testing::abc::def ::testing::abc::ghi}
+
+test namespace-56.4 {bug 16fe1b5807: names starting with ":"} {
+namespace eval : {
+    namespace ensemble create
+    namespace export *
+    proc p1 {} {
+	    return 16fe1b5807
+    }
+}
+
+: p1
+} 16fe1b5807
+
+# cleanup
+catch {rename cmd1 {}}
+catch {unset l}
+catch {unset msg}
+catch {unset trigger}
+namespace delete {*}[namespace children :: test_ns_*]
+::tcltest::cleanupTests
+return
+
+# Local Variables:
+# mode: tcl
+# End: