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vars(3pm)                             Perl Programmers Reference Guide                             vars(3pm)



NAME
       vars - Perl pragma to predeclare global variable names (obsolete)

SYNOPSIS
           use vars qw($frob @mung %seen);

DESCRIPTION
       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       superseded by "our" declarations, available in Perl v5.6.0 or later.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 warnings.

       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, ensuring their availability to the later-loaded laterloaded
       loaded routines.

       See "Pragmatic Modules" in perlmodlib.



perl v5.16.2                                     2012-10-25                                        vars(3pm)