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Updated: Thursday, June 13, 2019

vars (3)


vars - Perl pragma to predeclare global variable names


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


Perl Programmers Reference Guide                                       vars(3)

       vars - Perl pragma to predeclare global variable names

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

       NOTE: For use with variables in the current package for a single scope,
       the functionality provided by this pragma has been superseded by "our"
       declarations, available in Perl v5.6.0 or later, and use of this pragma
       is discouraged.  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,
       ensuring their availability to the later-loaded routines.

       See "Pragmatic Modules" in perlmodlib.

       See attributes(7) for descriptions of the following attributes:

       |Availability   | runtime/perl-526      |
       |Stability      | Pass-through volatile |
       This software was built from source available at
       https://github.com/oracle/solaris-userland.  The original community
       source was downloaded from

       Further information about this software can be found on the open source
       community website at http://www.perl.org/.

perl v5.26.3                      2018-03-01                           vars(3)