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

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 • 26963 total dependents </title> <rect x="0" y="0" width="4" height="15" fill="#7ea3f2" /> <rect x="5" y="0" width="4" height="15" fill="#7ea3f2" /> <rect x="10" y="0" width="4" height="15" fill="#7ea3f2" /> <rect x="15" y="0" width="4" height="15" fill="#7ea3f2" /> <rect x="20" y="0" width="4" height="15" fill="#7ea3f2" /> </g> </svg> </span> <div id="parent-fav" class="show-logged-in"> <form action="/account/favorite/add" style="display: inline" method="POST"> <input type="hidden" name="remove" value="0"> <input type="hidden" name="release" value="parent-0.244"> <input type="hidden" name="author" value="CORION"> <input type="hidden" name="distribution" value="parent"> <button type="submit" class="favorite highlight"><span>25</span> ++</button> </form> </div> <div class="show-logged-out"> <button class="fav-not-logged-in favorite highlight"><span>25</span> ++</button> </div> / <span>parent</span> </div> </div> <main class="content"> <nav class="toc"> <div class="toc-header"><strong>Contents</strong></div> <ul> <li><a href="#NAME">NAME</a></li> <li><a href="#SYNOPSIS">SYNOPSIS</a></li> <li><a href="#DESCRIPTION">DESCRIPTION</a></li> <li><a href="#HISTORY">HISTORY</a></li> <li><a href="#CAVEATS">CAVEATS</a></li> <li><a href="#SEE-ALSO">SEE ALSO</a></li> <li><a href="#AUTHORS-AND-CONTRIBUTORS">AUTHORS AND CONTRIBUTORS</a></li> <li><a href="#MAINTAINER">MAINTAINER</a></li> <li><a href="#LICENSE">LICENSE</a></li> </ul></nav> <div class="pod anchors"> <h1 id="NAME">NAME</h1> <p>parent - Establish an ISA relationship with base classes at compile time</p> <h1 id="SYNOPSIS">SYNOPSIS</h1> <pre><code>package Baz; use parent qw(Foo Bar);</code></pre> <h1 id="DESCRIPTION">DESCRIPTION</h1> <p>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</p> <pre><code>package Baz; BEGIN { require Foo; require Bar; push @ISA, qw(Foo Bar); }</code></pre> <p>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 <code>parent</code> not to load any modules by using the <code>-norequire</code> switch:</p> <pre><code>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</code></pre> <p>This is equivalent to the following code:</p> <pre><code>package Foo; sub exclaim { "I CAN HAS PERL" } package DoesNotLoadFooBar; push @DoesNotLoadFooBar::ISA, 'Foo', 'Bar';</code></pre> <p>This is also helpful for the case where a package lives within a differently named file:</p> <pre><code>package MyHash; use Tie::Hash; use parent -norequire, 'Tie::StdHash';</code></pre> <p>This is equivalent to the following code:</p> <pre><code>package MyHash; require Tie::Hash; push @ISA, 'Tie::StdHash';</code></pre> <p>If you want to load a subclass from a file that <code>require</code> would not consider an eligible filename (that is, it does not end in either <code>.pm</code> or <code>.pmc</code>), use the following code:</p> <pre><code>package MySecondPlugin; require './plugins/custom.plugin'; # contains Plugin::Custom use parent -norequire, 'Plugin::Custom';</code></pre> <h1 id="HISTORY">HISTORY</h1> <p>This module was forked from <a href="/pod/base">base</a> to remove the cruft that had accumulated in it.</p> <h1 id="CAVEATS">CAVEATS</h1> <h1 id="SEE-ALSO"><a id="SEE"></a>SEE ALSO</h1> <dl> <dt id="base"><a href="/pod/base">base</a></dt> <dd> </dd> <dt id="parent::versioned"><a id="parent"></a><a href="/pod/parent::versioned">parent::versioned</a></dt> <dd> <p>A fork of <a href="/pod/parent">parent</a> that provides version checking in parent class modules.</p> </dd> </dl> <h1 id="AUTHORS-AND-CONTRIBUTORS"><a id="AUTHORS"></a>AUTHORS AND CONTRIBUTORS</h1> <p>Rafaël Garcia-Suarez, Bart Lateur, Max Maischein, Anno Siegel, Michael Schwern</p> <h1 id="MAINTAINER">MAINTAINER</h1> <p>Max Maischein <code> corion@cpan.org </code></p> <p>Copyright (c) 2007-2017 Max Maischein <code><corion@cpan.org></code> Based on the idea of <code>base.pm</code>, which was introduced with Perl 5.004_04.</p> <h1 id="LICENSE">LICENSE</h1> <p>This module is released under the same terms as Perl itself.</p></div> <div id="metacpan_install-instructions-dialog" class="modal fade"> <div class="modal-dialog"> <div class="modal-content"> <div class="modal-header"> <button type="button" class="close" data-dismiss="modal" aria-hidden="true">×</button> <h4 class="modal-title">Module Install Instructions</h4> </div> <div class="modal-body"> <p>To install parent, copy and paste the appropriate command in to your terminal.</p> <p><a href="/dist/App-cpanminus/view/bin/cpanm">cpanm</a></p> <pre><code>cpanm parent</code></pre> <p><a href="/pod/CPAN">CPAN shell</a></p> <pre><code>perl -MCPAN -e shell install parent</code></pre> <p>For more information on module installation, please visit <a 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parent - Establish an ISA relationship with base classes at compile time - metacpan.org