unixdev.net


Switch to SpeakEasy.net DSL

The Modular Manual Browser

Home Page
Manual: (OpenBSD-3.6)
Page:
Section:
Apropos / Subsearch:
optional field



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


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 function-
       ality provided by this pragma has been superseded by "our"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 declara-
       tions 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.

























perl v5.8.5                 2002-11-06                          1