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parent: Establish an ISA relationship with base classes at compile time

NAME

parent - Establish an ISA relationship with base classes at compile time

SYNOPSIS

package Baz; use parent qw(Foo Bar);

DESCRIPTION

Allows you to both load one or more modules, while setting up inheritance from those modules at the same time. Mostly similar in effect to package Baz; BEGIN { require Foo; require Bar; push @ISA, qw(Foo Bar); } By default, every base class needs to live in a file of its own. If you want to have a subclass and its parent class in the same file, you can tell "parent" not to load any modules by using the "-norequire" switch: package Foo; sub exclaim { "I CAN HAS PERL" } package DoesNotLoadFooBar; use parent -norequire, 'Foo', 'Bar'; # will not go looking for Foo.pm or Bar.pm This is equivalent to the following code: package Foo; sub exclaim { "I CAN HAS PERL" } package DoesNotLoadFooBar; push @DoesNotLoadFooBar::ISA, 'Foo', 'Bar'; This is also helpful for the case where a package lives within a differently named file: package MyHash; use Tie::Hash; use parent -norequire, 'Tie::StdHash'; This is equivalent to the following code: package MyHash; require Tie::Hash; push @ISA, 'Tie::StdHash'; If you want to load a subclass from a file that "require" would not consider an eligible filename (that is, it does not end in either ".pm" or ".pmc"), use the following code: package MySecondPlugin; require './plugins/custom.plugin'; # contains Plugin::Custom use parent -norequire, 'Plugin::Custom';

DIAGNOSTICS

Class 'Foo' tried to inherit from itself Attempting to inherit from yourself generates a warning. use Foo; use parent 'Foo';
HISTORY
This module was forked from base to remove the cruft that had accumulated in it.
CAVEATS

SEE ALSO

base

AUTHORS AND CONTRIBUTORS

Rafaeel Garcia-Suarez, Bart Lateur, Max Maischein, Anno Siegel, Michael Schwern

MAINTAINER

Max Maischein " corion@cpan.org " Copyright (c) 2007 Max Maischein "<corion@cpan.org>" Based on the idea of "base.pm", which was introduced with Perl 5.004_04.

LICENSE

This module is released under the same terms as Perl itself. PARENT(3)
 
 
 

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