vars - Perl pragma to predeclare global variable names (obsolete)
use vars qw($frob @mung %seen);
NOTE: For variables in the current package, the functionality provided
by this pragma has been superseded by "our" declarations, available in
Perl v5.6.0 or later. See "our" in perlfunc.
This will predeclare all the variables whose names are in the list,
allowing you to use them under "use strict", and disabling any typo
Unlike pragmas that affect the $^H hints variable, the "use vars" and
"use subs" declarations are not BLOCK-scoped. They are thus effective
for the entire file in which they appear. You may not rescind such
declarations with "no vars" or "no subs".
Packages such as the AutoLoader and SelfLoader that delay loading of
subroutines within packages can create problems with package lexicals
defined using "my()". While the vars pragma cannot duplicate the effect
of package lexicals (total transparency outside of the package), it can
act as an acceptable substitute by pre-declaring global symbols, ensur-
ing their availability to the later-loaded routines.
See "Pragmatic Modules" in perlmodlib.
perl v5.8.8 2006-06-14 vars(3)
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