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authorWilliam Joye <wjoye@cfa.harvard.edu>2016-12-21 22:13:18 (GMT)
committerWilliam Joye <wjoye@cfa.harvard.edu>2016-12-21 22:13:18 (GMT)
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-'\"
-'\" Copyright (c) 2003 Donal K. Fellows
-'\"
-'\" See the file "license.terms" for information on usage and redistribution
-'\" of this file, and for a DISCLAIMER OF ALL WARRANTIES.
-'\"
-'\" Note that some of these functions do not seem to belong, but they
-'\" were all introduced with the same TIP (#139)
-'\"
-.TH Tcl_Namespace 3 8.5 Tcl "Tcl Library Procedures"
-.so man.macros
-.BS
-.SH NAME
-Tcl_AppendExportList, Tcl_CreateNamespace, Tcl_DeleteNamespace, Tcl_Export, Tcl_FindCommand, Tcl_FindNamespace, Tcl_ForgetImport, Tcl_GetCurrentNamespace, Tcl_GetGlobalNamespace, Tcl_GetNamespaceUnknownHandler, Tcl_Import, Tcl_SetNamespaceUnknownHandler \- manipulate namespaces
-.SH SYNOPSIS
-.nf
-\fB#include <tcl.h>\fR
-.sp
-Tcl_Namespace *
-\fBTcl_CreateNamespace\fR(\fIinterp, name, clientData, deleteProc\fR)
-.sp
-\fBTcl_DeleteNamespace\fR(\fInsPtr\fR)
-.sp
-int
-\fBTcl_AppendExportList\fR(\fIinterp, nsPtr, objPtr\fR)
-.sp
-int
-\fBTcl_Export\fR(\fIinterp, nsPtr, pattern, resetListFirst\fR)
-.sp
-int
-\fBTcl_Import\fR(\fIinterp, nsPtr, pattern, allowOverwrite\fR)
-.sp
-int
-\fBTcl_ForgetImport\fR(\fIinterp, nsPtr, pattern\fR)
-.sp
-Tcl_Namespace *
-\fBTcl_GetCurrentNamespace\fR(\fIinterp\fR)
-.sp
-Tcl_Namespace *
-\fBTcl_GetGlobalNamespace\fR(\fIinterp\fR)
-.sp
-Tcl_Namespace *
-\fBTcl_FindNamespace\fR(\fIinterp, name, contextNsPtr, flags\fR)
-.sp
-Tcl_Command
-\fBTcl_FindCommand\fR(\fIinterp, name, contextNsPtr, flags\fR)
-.sp
-Tcl_Obj *
-\fBTcl_GetNamespaceUnknownHandler(\fIinterp, nsPtr\fR)
-.sp
-int
-\fBTcl_SetNamespaceUnknownHandler(\fIinterp, nsPtr, handlerPtr\fR)
-.SH ARGUMENTS
-.AS Tcl_NamespaceDeleteProc allowOverwrite in/out
-.AP Tcl_Interp *interp in/out
-The interpreter in which the namespace exists and where name lookups
-are performed. Also where error result messages are written.
-.AP "const char" *name in
-The name of the namespace or command to be created or accessed.
-.AP ClientData clientData in
-A context pointer by the creator of the namespace. Not interpreted by
-Tcl at all.
-.AP Tcl_NamespaceDeleteProc *deleteProc in
-A pointer to function to call when the namespace is deleted, or NULL
-if no such callback is to be performed.
-.AP Tcl_Namespace *nsPtr in
-The namespace to be manipulated, or NULL (for other than
-\fBTcl_DeleteNamespace\fR) to manipulate the current namespace.
-.AP Tcl_Obj *objPtr out
-A reference to an unshared value to which the function output will be
-written.
-.AP "const char" *pattern in
-The glob-style pattern (see \fBTcl_StringMatch\fR) that describes the
-commands to be imported or exported.
-.AP int resetListFirst in
-Whether the list of export patterns should be reset before adding the
-current pattern to it.
-.AP int allowOverwrite in
-Whether new commands created by this import action can overwrite
-existing commands.
-.AP Tcl_Namespace *contextNsPtr in
-The location in the namespace hierarchy where the search for a
-namespace or command should be conducted relative to when the search
-term is not rooted at the global namespace. NULL indicates the
-current namespace.
-.AP int flags in
-OR-ed combination of bits controlling how the search is to be
-performed. The following flags are supported: \fBTCL_GLOBAL_ONLY\fR
-(indicates that the search is always to be conducted relative to the
-global namespace), \fBTCL_NAMESPACE_ONLY\fR (just for \fBTcl_FindCommand\fR;
-indicates that the search is always to be conducted relative to the
-context namespace), and \fBTCL_LEAVE_ERR_MSG\fR (indicates that an error
-message should be left in the interpreter if the search fails.)
-.AP Tcl_Obj *handlerPtr in
-A script fragment to be installed as the unknown command handler for the
-namespace, or NULL to reset the handler to its default.
-.BE
-.SH DESCRIPTION
-.PP
-Namespaces are hierarchic naming contexts that can contain commands
-and variables. They also maintain a list of patterns that describes
-what commands are exported, and can import commands that have been
-exported by other namespaces. Namespaces can also be manipulated
-through the Tcl command \fBnamespace\fR.
-.PP
-The \fITcl_Namespace\fR structure encapsulates a namespace, and is
-guaranteed to have the following fields in it: \fIname\fR (the local
-name of the namespace, with no namespace separator characters in it,
-with empty denoting the global namespace), \fIfullName\fR (the fully
-specified name of the namespace), \fIclientData\fR, \fIdeleteProc\fR
-(the values specified in the call to \fBTcl_CreateNamespace\fR), and
-\fIparentPtr\fR (a pointer to the containing namespace, or NULL for
-the global namespace.)
-.PP
-\fBTcl_CreateNamespace\fR creates a new namespace. The
-\fIdeleteProc\fR will have the following type signature:
-.PP
-.CS
-typedef void \fBTcl_NamespaceDeleteProc\fR(
- ClientData \fIclientData\fR);
-.CE
-.PP
-\fBTcl_DeleteNamespace\fR deletes a namespace, calling the
-\fIdeleteProc\fR defined for the namespace (if any).
-.PP
-\fBTcl_AppendExportList\fR retrieves the export patterns for a
-namespace given namespace and appends them (as list items) to
-\fIobjPtr\fR.
-.PP
-\fBTcl_Export\fR sets and appends to the export patterns for a
-namespace. Patterns are appended unless the \fIresetListFirst\fR flag
-is true.
-.PP
-\fBTcl_Import\fR imports commands matching a pattern into a
-namespace. Note that the pattern must include the name of the
-namespace to import from. This function returns an error if
-an attempt to import a command over an existing command is made,
-unless the \fIallowOverwrite\fR flag has been set.
-.PP
-\fBTcl_ForgetImport\fR removes imports matching a pattern.
-.PP
-\fBTcl_GetCurrentNamespace\fR returns the current namespace for an
-interpreter.
-.PP
-\fBTcl_GetGlobalNamespace\fR returns the global namespace for an
-interpreter.
-.PP
-\fBTcl_FindNamespace\fR searches for a namespace named \fIname\fR
-within the context of the namespace \fIcontextNsPtr\fR. If the
-namespace cannot be found, NULL is returned.
-.PP
-\fBTcl_FindCommand\fR searches for a command named \fIname\fR within
-the context of the namespace \fIcontextNsPtr\fR. If the command
-cannot be found, NULL is returned.
-.PP
-\fBTcl_GetNamespaceUnknownHandler\fR returns the unknown command handler
-for the namespace, or NULL if none is set.
-.PP
-\fBTcl_SetNamespaceUnknownHandler\fR sets the unknown command handler for
-the namespace. If \fIhandlerPtr\fR is NULL, then the handler is reset to
-its default.
-.SH "SEE ALSO"
-Tcl_CreateCommand(3), Tcl_ListObjAppendList(3), Tcl_SetVar(3)
-.SH KEYWORDS
-namespace, command