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ActiveTcl User Guide |
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global - Access global variables
global varname ?varname ...?
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.
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
}
namespace, upvar, variable
global, namespace, procedure, variable
Copyright © 1995-1997 Roger E. Critchlow Jr.
Copyright © 1993 The Regents of the University of California.
Copyright © 1994-1997 Sun Microsystems, Inc.