global - Access global variables
global ?varname ...?
global(1t) Tcl Built-In Commands global(1t) ______________________________________________________________________________ NAME global - Access global variables SYNOPSIS global ?varname ...? ______________________________________________________________________________ DESCRIPTION This command has no effect unless executed in the context of a proc body. If the global command is executed in the context of a proc body, it creates local variables linked to the corresponding global variables (though these linked variables, like those created by upvar, are not included in the list returned by info locals). If varname contains namespace qualifiers, the local variable's name is the unqualified name of the global variable, as determined by the namespace tail command. varname is always treated as the name of a variable, not an array ele- ment. An error is returned if the name looks like an array element, such as a(b). EXAMPLES This procedure sets the namespace variable ::a::x proc reset {} { global a::x set x 0 } 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 puts) but send that full message in a single piece (e.g. over a connection opened with socket or as part of a counted HTTP response). proc accum {string} { global accumulator append accumulator $string \n } ATTRIBUTES See attributes(7) for descriptions of the following attributes: +---------------+------------------+ |ATTRIBUTE TYPE | ATTRIBUTE VALUE | +---------------+------------------+ |Availability | runtime/tcl-8 | +---------------+------------------+ |Stability | Uncommitted | +---------------+------------------+ SEE ALSO namespace(n), upvar(n), variable(n) KEYWORDS global, namespace, procedure, variable NOTES Source code for open source software components in Oracle Solaris can be found at https://www.oracle.com/downloads/opensource/solaris-source- code-downloads.html. This software was built from source available at https://github.com/oracle/solaris-userland. The original community source was downloaded from http://prdownloads.sourceforge.net/tcl/tcl- core8.6.7-src.tar.gz. Further information about this software can be found on the open source community website at https://www.tcl.tk/. Tcl global(1t)