vars(3) Perl Programmers Reference Guide vars(3)NAME
vars - Perl pragma to predeclare global variable names
(obsolete)
SYNOPSIS
use vars qw($frob @mung %seen);
DESCRIPTION
NOTE: The functionality provided by this pragma has been
superseded by "our" declarations, available in Perl v5.6.0
or later. See the our entry in the perlfunc manpage.
This will predeclare all the variables whose names are in
the list, allowing you to use them under "use strict", and
disabling any typo warnings.
Unlike pragmas that affect the "$^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 Pragmatic Modules entry in the perlmodlib manpage.
2001-02-22 perl v5.6.1 vars(3)
