int Tcl_UpVar(interp, frameName, sourceName, destName, flags)
int Tcl_UpVar2(interp, frameName, name1, name2, destName, flags)
- Tcl_Interp *interp (in)
Interpreter containing variables; also used for error reporting.
- char *frameName (in)
Identifies the stack frame containing source variable. May have any of the forms accepted by the upvar command, such as #0 or 1.
- char *sourceName (in)
Name of source variable, in the frame given by frameName. May refer to a scalar variable or to an array variable with a parenthesized index.
- char *destName (in)
Name of destination variable, which is to be linked to source variable so that references to destName refer to the other variable. Must not currently exist except as an upvar-ed variable.
- int flags (in)
Either TCL_GLOBAL_ONLY or 0; if non-zero, then destName is a global variable; otherwise it is a local to the current procedure (or global if no procedure is active).
- char *name1 (in)
First part of source variable's name (scalar name, or name of array without array index).
- char *name2 (in)
If source variable is an element of an array, gives the index of the element. For scalar source variables, is NULL.
Both procedures return either TCL_OK or TCL_ERROR, and they leave an error message in the interpreter's result if an error occurs.
As with the upvar 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.
Windows Server 2012. Windows 8.1. Windows Server 2012 R2. Windows 10. Windows Server 2016. Windows Server 2019.
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