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-'\"
-'\" Copyright (c) 1994 The Regents of the University of California.
-'\" Copyright (c) 1994-1996 Sun Microsystems, Inc.
-'\"
-'\" See the file "license.terms" for information on usage and redistribution
-'\" of this file, and for a DISCLAIMER OF ALL WARRANTIES.
-'\"
-.TH Tcl_UpVar 3 7.4 Tcl "Tcl Library Procedures"
-.so man.macros
-.BS
-.SH NAME
-Tcl_UpVar, Tcl_UpVar2 \- link one variable to another
-.SH SYNOPSIS
-.nf
-\fB#include <tcl.h>\fR
-.sp
-int
-\fBTcl_UpVar(\fIinterp, frameName, sourceName, destName, flags\fB)\fR
-.sp
-int
-\fBTcl_UpVar2(\fIinterp, frameName, name1, name2, destName, flags\fB)\fR
-.SH ARGUMENTS
-.AS "const char" *sourceName
-.AP Tcl_Interp *interp in
-Interpreter containing variables; also used for error reporting.
-.AP "const char" *frameName in
-Identifies the stack frame containing source variable.
-May have any of the forms accepted by
-the \fBupvar\fR command, such as \fB#0\fR or \fB1\fR.
-.AP "const char" *sourceName in
-Name of source variable, in the frame given by \fIframeName\fR.
-May refer to a scalar variable or to an array variable with a
-parenthesized index.
-.AP "const char" *destName in
-Name of destination variable, which is to be linked to source
-variable so that references to \fIdestName\fR
-refer to the other variable. Must not currently exist except as
-an upvar-ed variable.
-.AP int flags in
-One of \fBTCL_GLOBAL_ONLY\fR, \fBTCL_NAMESPACE_ONLY\fR or 0; if non-zero,
-then \fIdestName\fR is a global or namespace variable; otherwise it is
-local to the current procedure (or current namespace if no procedure is
-active).
-.AP "const char" *name1 in
-First part of source variable's name (scalar name, or name of array
-without array index).
-.AP "const char" *name2 in
-If source variable is an element of an array, gives the index of the element.
-For scalar source variables, is NULL.
-.BE
-
-.SH DESCRIPTION
-.PP
-\fBTcl_UpVar\fR and \fBTcl_UpVar2\fR provide the same functionality
-as the \fBupvar\fR command: they make a link from a source variable
-to a destination variable, so that references to the destination are
-passed transparently through to the source.
-The name of the source variable may be specified either as a single
-string such as \fBxyx\fR or \fBa(24)\fR (by calling \fBTcl_UpVar\fR)
-or in two parts where the array name has been separated from the
-element name (by calling \fBTcl_UpVar2\fR).
-The destination variable name is specified in a single string; it
-may not be an array element.
-.PP
-Both procedures return either \fBTCL_OK\fR or \fBTCL_ERROR\fR, and they
-leave an error message in the interpreter's result if an error occurs.
-.PP
-As with the \fBupvar\fR command, the source variable need not exist;
-if it does exist, unsetting it later does not destroy the link. The
-destination variable may exist at the time of the call, but if so
-it must exist as a linked variable.
-
-.SH KEYWORDS
-linked variable, upvar, variable