


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


NAME
       vars - Perl pragma to predeclare global variable names

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


DESCRIPTION
       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 routines.

       See the section on Pragmatic Modules in the perlmodlib
       manpage.





























29/Apr/1999            perl 5.005, patch 03                     1


