1 files changed, 40 insertions, 0 deletions
diff --git a/generic/tclLiteral.c b/generic/tclLiteral.c
index 3a9f8e1..441ea91 100644
--- a/generic/tclLiteral.c
+++ b/generic/tclLiteral.c
@@ -936,6 +936,46 @@ RebuildLiteralTable(
     }
 }
 
+/*
+ *----------------------------------------------------------------------
+ *
+ * TclInvalidateCmdLiteral --
+ *
+ *	Invalidate a command literal entry, if present in the literal hash
+ *	tables, by resetting its internal representation. This invalidation
+ *	leaves it in the literal tables and in existing literal arrays. As a
+ *	result, existing references continue to work but we force a fresh
+ *	command look-up upon the next use (see, in particular,
+ *	TclSetCmdNameObj()).
+ *
+ * Results:
+ *	None.
+ *
+ * Side effects: 
+ *	Resets the internal representation of the CmdName Tcl_Obj
+ *	using TclFreeIntRep().
+ *
+ *----------------------------------------------------------------------
+ */
+
+void
+TclInvalidateCmdLiteral(
+    Tcl_Interp *interp,		/* Interpreter for which to invalidate a
+				 * command literal. */
+    const char *name,		/* Points to the start of the cmd literal
+				 * name. */
+    Namespace *nsPtr)		/* The namespace for which to lookup and
+				 * invalidate a cmd literal. */
+{
+    Interp *iPtr = (Interp *) interp;
+    Tcl_Obj *literalObjPtr = TclCreateLiteral(iPtr, (char *) name,
+	    strlen(name), -1, NULL, nsPtr, 0, NULL);
+
+    if (literalObjPtr != NULL && literalObjPtr->typePtr == &tclCmdNameType) {
+	TclFreeIntRep(literalObjPtr);
+    }
+}
+
 #ifdef TCL_COMPILE_STATS
 /*
  *----------------------------------------------------------------------