GSP
Quick Navigator

Search Site

Unix VPS
A - Starter
B - Basic
C - Preferred
D - Commercial
MPS - Dedicated
Previous VPSs
* Sign Up! *

Support
Contact Us
Online Help
Handbooks
Domain Status
Man Pages

FAQ
Virtual Servers
Pricing
Billing
Technical

Network
Facilities
Connectivity
Topology Map

Miscellaneous
Server Agreement
Year 2038
Credits
 

USA Flag

 

 

Man Pages


Manual Reference Pages  -  VARS (3)

.ds Aq ’

NAME

vars - Perl pragma to predeclare global variable names

CONTENTS

SYNOPSIS



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



DESCRIPTION

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For use with variables in the current package for a single scope, the functionality provided by this pragma has been superseded by our declarations, available in Perl v5.6.0 or later, and use of this pragma is discouraged.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 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 <B>AutoLoaderB> and <B>SelfLoaderB> that delay loading of subroutines within packages can create problems with package lexicals defined using my(). While the <B>varsB> 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.

Search for    or go to Top of page |  Section 3 |  Main Index


perl v5.22.1 VARS (3) 2015-10-17

Powered by GSP Visit the GSP FreeBSD Man Page Interface.
Output converted with manServer 1.07.