parent(3pm) [osx man page]
parent(3pm) Perl Programmers Reference Guide parent(3pm) 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. package 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) 2007-10 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. perl v5.16.2 2012-10-11 parent(3pm)
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parent(3pm) Perl Programmers Reference Guide parent(3pm) 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. package 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) 2007-10 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. perl v5.16.2 2012-10-11 parent(3pm)