global.n
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- '"
- '" Copyright (c) 1993 The Regents of the University of California.
- '" Copyright (c) 1994-1997 Sun Microsystems, Inc.
- '"
- '" See the file "license.terms" for information on usage and redistribution
- '" of this file, and for a DISCLAIMER OF ALL WARRANTIES.
- '"
- '" RCS: @(#) $Id: global.n,v 1.4.2.1 2004/10/27 12:52:40 dkf Exp $
- '"
- .so man.macros
- .TH global n "" Tcl "Tcl Built-In Commands"
- .BS
- '" Note: do not modify the .SH NAME line immediately below!
- .SH NAME
- global - Access global variables
- .SH SYNOPSIS
- fBglobal fIvarname fR?fIvarname ...fR?
- .BE
- .SH DESCRIPTION
- .PP
- This command has no effect unless executed in the context of a proc body.
- If the fBglobalfR command is executed in the context of a proc body, it
- creates local variables linked to the corresponding global variables (and
- therefore these variables are listed by info locals).
- .PP
- If fIvarnamefR contains namespace qualifiers, the local variable's name is
- the unqualified name of the global variable, as determined by the
- fBnamespace tailfR command.
- .SH EXAMPLES
- This procedure sets the namespace variable fI::a::xfR
- .CS
- proc reset {} {
- fBglobalfR a::x
- set x 0
- }
- .CE
- .PP
- This procedure accumulates the strings passed to it in a global
- buffer, separated by newlines. It is useful for situations when you
- want to build a message piece-by-piece (as if with fBputsfR) but
- send that full message in a single piece (e.g. over a connection
- opened with fBsocketfR or as part of a counted HTTP response).
- .CS
- proc accum {string} {
- fBglobalfR accumulator
- append accumulator $string \n
- }
- .CE
- .SH "SEE ALSO"
- namespace(n), upvar(n), variable(n)
- .SH KEYWORDS
- global, namespace, procedure, variable