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parent.3pm
Langue: en
Version: 2010-04-26 (MeeGo - 06/11/10)
Section: 3 (Bibliothèques de fonctions)
Sommaire
NAME
parent - Establish an ISA relationship with base classes at compile timeSYNOPSIS
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 topackage 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
baseAUTHORS AND CONTRIBUTORS
Rafae.l Garcia-Suarez, Bart Lateur, Max Maischein, Anno Siegel, Michael SchwernMAINTAINER
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.Contenus ©2006-2024 Benjamin Poulain
Design ©2006-2024 Maxime Vantorre