Role::Tiny - Roles: a nouvelle cuisine portion size slice of Moose

<!DOCTYPE html> <html lang="en-US"> <head> <title>Role::Tiny - Roles: a nouvelle cuisine portion size slice of Moose - metacpan.org</title> <link rel="preload" as="fetch" href="/account/login_status" crossorigin="anonymous" /> <link href="/assets/style-XFEQ536G.css" rel="stylesheet" type="text/css"> <script src="/assets/main-WXBSEDQJ.js" type="module"></script> <link rel="alternate" type="application/rss+xml" title="Recent CPAN Uploads of Role-Tiny - MetaCPAN" href="/dist/Role-Tiny/releases.rss" /> <link rel="canonical" href="https://metacpan.org/pod/Role::Tiny" /> <meta name="description" content="Roles: a nouvelle cuisine portion size slice of Moose" /> <meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=5"> <link rel="shortcut icon" href="/static/icons/favicon.ico"> <link rel="apple-touch-icon" sizes="152x152" href="/static/icons/apple-touch-icon.png"> <link rel="search" href="/static/opensearch.xml" type="application/opensearchdescription+xml" 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UTC</span> </div> </li> <li> Distribution: <a href="/dist/Role-Tiny">Role-Tiny</a> </li> <li> Module version: 2.002004 </li> <li> <a data-keyboard-shortcut="g s" href="/dist/Role-Tiny/source/lib/Role/Tiny.pm">Source</a> (<a href="/dist/Role-Tiny/source/lib/Role/Tiny.pm?raw=1">raw</a>) </li> <li> <a data-keyboard-shortcut="g b" href="/dist/Role-Tiny/source/lib/Role">Browse</a> (<a href="/dist/Role-Tiny/source/lib/Role?raw=1">raw</a>) </li> <li> <a data-keyboard-shortcut="g c" href="/dist/Role-Tiny/changes">Changes</a> </li> <li> <a class="nopopup" href="/dist/Role-Tiny/contribute">How to Contribute</a> </li> <li> <a rel="noopener nofollow" data-keyboard-shortcut="g r" href="https://github.com/moose/Role-Tiny">Repository</a> </li> <li> <a rel="noopener nofollow" data-keyboard-shortcut="g i" href="https://rt.cpan.org/Public/Dist/Display.html?Name=Role-Tiny">Issues</a> (3) </li> <li> <a rel="noopener nofollow" href="http://matrix.cpantesters.org/?dist=Role-Tiny+2.002004" title="Matrix">Testers</a> <span title="(pass / fail / na)">(<a rel="noopener nofollow" href="https://www.cpantesters.org/distro/R/Role-Tiny.html?oncpan=1&distmat=1&version=2.002004&grade=2" style="color: #090">6812</a> / <a rel="noopener nofollow" href="https://www.cpantesters.org/distro/R/Role-Tiny.html?oncpan=1&distmat=1&version=2.002004&grade=3" style="color: #900">0</a> / <a rel="noopener nofollow" href="https://www.cpantesters.org/distro/R/Role-Tiny.html?oncpan=1&distmat=1&version=2.002004&grade=4">0</a>)</span> </li> <li> <a rel="noopener nofollow" href="http://cpants.cpanauthors.org/release/HAARG/Role-Tiny-2.002004">Kwalitee</a> </li> <li> <div class="ttip" data-toggle="tooltip" data-placement="bottom" title="The # people with an indexing permission on Role-Tiny who have released something to CPAN in the last 2 years (i.e. the # people likely able to release critical fixes in a timely manner)"> Bus factor: 6 </div> </li> <li> <a rel="noopener nofollow" href="http://cpancover.com/latest/Role-Tiny-2.002004/index.html">90.68% Coverage </a> </li> <li> License: perl_5 </li> <li> Perl: v5.6.0 </li> <li class="chat-banner"> <div><a rel="noopener nofollow" target="_blank" href="https://kiwiirc.com/nextclient/#irc://irc.perl.org/#moose?nick=mc-guest-?">Chat with us!</a></div> </li> <li class="nav-header">Activity</li> <li> <div class="activity-graph"> <img src="/dist/Role-Tiny/activity.svg?res=month" /> <div class="comment">24 month</div> </div> </li> <li class="nav-header">Tools</li> <li> <a itemprop="downloadUrl" href="https://cpan.metacpan.org/authors/id/H/HA/HAARG/Role-Tiny-2.002004.tar.gz"> Download (<span itemprop="fileSize">35.1KB</span>)</a> </li> <li> <a href="https://explorer.metacpan.org/?url=%2Fmodule%2FHAARG%2FRole-Tiny-2.002004%2Flib%2FRole%2FTiny.pm"> MetaCPAN Explorer </a> </li> <li> <a href="/dist/Role-Tiny/permissions"> Permissions </a> </li> <li> <a href="/dist/Role-Tiny/releases.rss"> Subscribe to distribution </a> </li> 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value="/release/HAARG/Role-Tiny-2.002003/view/lib/Role/Tiny.pm" >2.002003 (HAARG on 2021-01-11)</option> <option value="/release/HAARG/Role-Tiny-2.002_002/view/lib/Role/Tiny.pm" >2.002_002 DEV (HAARG on 2021-01-03)</option> <option value="/release/HAARG/Role-Tiny-2.002_001/view/lib/Role/Tiny.pm" >2.002_001 DEV (HAARG on 2020-12-27)</option> <option value="/release/HAARG/Role-Tiny-2.002_000/view/lib/Role/Tiny.pm" >2.002_000 DEV (HAARG on 2020-12-23)</option> <option value="/release/HAARG/Role-Tiny-2.001004/view/lib/Role/Tiny.pm" >2.001004 (HAARG on 2019-10-25)</option> <option value="/release/HAARG/Role-Tiny-2.001003/view/lib/Role/Tiny.pm" >2.001003 (HAARG on 2019-10-09)</option> <option value="/release/HAARG/Role-Tiny-2.001_002/view/lib/Role/Tiny.pm" >2.001_002 DEV (HAARG on 2019-10-06)</option> <option value="/release/HAARG/Role-Tiny-2.001001/view/lib/Role/Tiny.pm" >2.001001 (HAARG on 2019-10-01)</option> <option value="/release/HAARG/Role-Tiny-2.001_000/view/lib/Role/Tiny.pm" >2.001_000 DEV (HAARG on 2019-09-19)</option> <option value="/release/HAARG/Role-Tiny-2.000_009/view/lib/Role/Tiny.pm" >2.000_009 DEV (HAARG on 2019-09-06)</option> <option value="/release/HAARG/Role-Tiny-2.000008/view/lib/Role/Tiny.pm" >2.000008 (HAARG on 2019-08-05)</option> <option value="/release/ETHER/Role-Tiny-2.000007/view/lib/Role/Tiny.pm" >2.000007 (ETHER on 2019-07-31)</option> <option value="/release/HAARG/Role-Tiny-2.000006/view/lib/Role/Tiny.pm" >2.000006 (HAARG on 2017-11-08)</option> <option value="/release/HAARG/Role-Tiny-2.000005/view/lib/Role/Tiny.pm" >2.000005 (HAARG on 2016-11-01)</option> <option value="/release/HAARG/Role-Tiny-2.000004/view/lib/Role/Tiny.pm" >2.000004 (HAARG on 2016-10-31)</option> <option value="/release/HAARG/Role-Tiny-2.000003/view/lib/Role/Tiny.pm" >2.000003 (HAARG on 2016-04-21)</option> <option value="/release/HAARG/Role-Tiny-2.000002/view/lib/Role/Tiny.pm" >2.000002 (HAARG on 2016-04-19)</option> <option 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2013-02-01)</option> <option value="/release/ILMARI/Role-Tiny-1.002004/view/lib/Role/Tiny.pm" >1.002004 (ILMARI on 2012-11-02)</option> <option value="/release/ILMARI/Role-Tiny-1.002003/view/lib/Role/Tiny.pm" >1.002003 (ILMARI on 2012-10-29)</option> <option value="/release/ILMARI/Role-Tiny-1.002001/view/lib/Role/Tiny.pm" >1.002001 (ILMARI on 2012-10-26)</option> <option value="/release/MSTROUT/Role-Tiny-1.002000/view/lib/Role/Tiny.pm" >1.002000 (MSTROUT on 2012-10-19)</option> <option value="/release/ILMARI/Role-Tiny-1.001005/view/lib/Role/Tiny.pm" >1.001005 (ILMARI on 2012-07-18)</option> <option value="/release/MSTROUT/Role-Tiny-1.001004/view/lib/Role/Tiny.pm" >1.001004 (MSTROUT on 2012-07-12)</option> <optgroup label="BackPAN">' <option value="/release/ETHER/Role-Tiny-1.002002/view/lib/Role/Tiny.pm" >1.002002 (ETHER on 2012-10-28)</option> <option value="/release/MSTROUT/Role-Tiny-1.001003/view/lib/Role/Tiny.pm" >1.001003 (MSTROUT on 2012-06-19)</option> <option 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disabled value="/release/HAARG/Role-Tiny-2.002004/diff/HAARG/Role-Tiny-2.002004/lib/Role/Tiny.pm" >2.002004 (HAARG on 2021-01-24)</option> <option value="/release/HAARG/Role-Tiny-2.002004/diff/HAARG/Role-Tiny-2.002003/lib/Role/Tiny.pm" >2.002003 (HAARG on 2021-01-11)</option> <option value="/release/HAARG/Role-Tiny-2.002004/diff/HAARG/Role-Tiny-2.002_002/lib/Role/Tiny.pm" >2.002_002 DEV (HAARG on 2021-01-03)</option> <option value="/release/HAARG/Role-Tiny-2.002004/diff/HAARG/Role-Tiny-2.002_001/lib/Role/Tiny.pm" >2.002_001 DEV (HAARG on 2020-12-27)</option> <option value="/release/HAARG/Role-Tiny-2.002004/diff/HAARG/Role-Tiny-2.002_000/lib/Role/Tiny.pm" >2.002_000 DEV (HAARG on 2020-12-23)</option> <option value="/release/HAARG/Role-Tiny-2.002004/diff/HAARG/Role-Tiny-2.001004/lib/Role/Tiny.pm" >2.001004 (HAARG on 2019-10-25)</option> <option value="/release/HAARG/Role-Tiny-2.002004/diff/HAARG/Role-Tiny-2.001003/lib/Role/Tiny.pm" >2.001003 (HAARG on 2019-10-09)</option> <option 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value="/release/HAARG/Role-Tiny-2.002004/diff/HAARG/Role-Tiny-1.003004/lib/Role/Tiny.pm" >1.003004 (HAARG on 2014-10-22)</option> <option value="/release/HAARG/Role-Tiny-2.002004/diff/HAARG/Role-Tiny-1.003003/lib/Role/Tiny.pm" >1.003003 (HAARG on 2014-03-15)</option> <option value="/release/HAARG/Role-Tiny-2.002004/diff/HAARG/Role-Tiny-1.003002/lib/Role/Tiny.pm" >1.003002 (HAARG on 2013-09-05)</option> <option value="/release/HAARG/Role-Tiny-2.002004/diff/HAARG/Role-Tiny-1.003001/lib/Role/Tiny.pm" >1.003001 (HAARG on 2013-07-15)</option> <option value="/release/HAARG/Role-Tiny-2.002004/diff/HAARG/Role-Tiny-1.003000/lib/Role/Tiny.pm" >1.003000 (HAARG on 2013-07-15)</option> <option value="/release/HAARG/Role-Tiny-2.002004/diff/MSTROUT/Role-Tiny-1.002005/lib/Role/Tiny.pm" >1.002005 (MSTROUT on 2013-02-01)</option> <option value="/release/HAARG/Role-Tiny-2.002004/diff/ILMARI/Role-Tiny-1.002004/lib/Role/Tiny.pm" >1.002004 (ILMARI on 2012-11-02)</option> <option 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(MSTROUT on 2012-03-29)</option> </optgroup> </select> </li> <li> <ul class="dependencies"> <li class="nav-header">Dependencies</li> <li><a href="/pod/Exporter" title="Exporter" class="ellipsis">Exporter</a></li> <li> <hr> </li> <li> <a href="/module/Role::Tiny/requires">Reverse dependencies</a> </li> <li> <a href="http://deps.cpantesters.org/?module=Role%3A%3ATiny">CPAN Testers List</a> </li> <li> <a href="https://cpandeps.grinnz.com/?dist=Role-Tiny">Dependency graph</a> </li> </ul> </li> <li class="nav-header">Permalinks</li> <li> <a href="/release/HAARG/Role-Tiny-2.002004/view/lib/Role/Tiny.pm">This version</a> </li> <li> <a href="/pod/Role::Tiny">Latest version</a> </li> <li> <div class="plussers"> <div class="nav-header">++ed by:</div> <div> <a class="display-all" href="/author/LUCAS"><img src="https://www.gravatar.com/avatar/289426c9d3c2ee28c2d157d4401e14db?d=identicon&s=20" title="LUCAS" alt="LUCAS"></a> <a class="display-all" href="/author/PERLBOY"><img src="https://www.gravatar.com/avatar/8553a87a00c8d2efcd77fb16e6eb73c9?d=identicon&s=20" title="PERLBOY" alt="PERLBOY"></a> <a class="display-all" href="/author/ANDREW"><img src="https://www.gravatar.com/avatar/18636b8c103162787de8d2b1728cf076?d=identicon&s=20" title="ANDREW" alt="ANDREW"></a> <a class="display-all" href="/author/PINGAN"><img src="https://www.gravatar.com/avatar/a02222e5e0e4fd24d52fc29a08ac6bcb?d=identicon&s=20" title="PINGAN" alt="PINGAN"></a> <a class="display-all" href="/author/CONTRA"><img src="https://www.gravatar.com/avatar/0c6e9af22d57e7e8641517069078da5b?d=identicon&s=20" title="CONTRA" alt="CONTRA"></a> </div>  <div> <a href="/dist/Role-Tiny/plussers">46 PAUSE users</a> </div> <div> 25 non-PAUSE users </div> </div> </li> <li> <div> <button class="contributors-show-button btn-link">and 1 contributors</button> <div id="metacpan_contributors" class="slide-out slide-out-hidden"> <div> <ul> <li class="contributor" data-contrib-email="mst@shadowcat.co.uk" > <img class="gravatar" width="20" height="20" src="https://www.gravatar.com/avatar/d41d8cd98f00b204e9800998ecf8427e?d=identicon&s=20" /> mst - Matt S. Trout (cpan:MSTROUT) </li> </ul> </div> </div> </div> </li> </ul> </div> </nav> <div class="content-navigation"> <div class="breadcrumbs"> <span> <a data-keyboard-shortcut="g a" rel="author" href="/author/HAARG" class="author-name">Graham Knop</a> </span> <span> / </span> <div class="release dist-release status-latest maturity-released"> <span class="dropdown"><b class="caret"></b></span> <select class="select-navigator "> <option selected value="/release/HAARG/Role-Tiny-2.002004/view/lib/Role/Tiny.pm" >2.002004 (HAARG on 2021-01-24)</option> <option value="/release/HAARG/Role-Tiny-2.002003/view/lib/Role/Tiny.pm" >2.002003 (HAARG on 2021-01-11)</option> <option value="/release/HAARG/Role-Tiny-2.002_002/view/lib/Role/Tiny.pm" >2.002_002 DEV (HAARG on 2021-01-03)</option> <option value="/release/HAARG/Role-Tiny-2.002_001/view/lib/Role/Tiny.pm" >2.002_001 DEV (HAARG on 2020-12-27)</option> <option value="/release/HAARG/Role-Tiny-2.002_000/view/lib/Role/Tiny.pm" >2.002_000 DEV (HAARG on 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value="/release/MSTROUT/Role-Tiny-1.000_901/view/lib/Role/Tiny.pm" >1.000_901 DEV (MSTROUT on 2012-04-12)</option> <option value="/release/MSTROUT/Role-Tiny-1.000_900/view/lib/Role/Tiny.pm" >1.000_900 DEV (MSTROUT on 2012-04-11)</option> <option value="/release/MSTROUT/Role-Tiny-1.000001/view/lib/Role/Tiny.pm" >1.000001 (MSTROUT on 2012-04-03)</option> <option value="/release/MSTROUT/Role-Tiny-1.000000/view/lib/Role/Tiny.pm" >1.000000 (MSTROUT on 2012-03-29)</option> </optgroup> </select> <a data-keyboard-shortcut="g d" class="release-name" href="/dist/Role-Tiny">Role-Tiny-2.002004</a> </div> <span class="river-gauge-gauge"> <svg width="24px" height="15px" version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"> <g> <title> River stage four 
 • 319 direct dependents 
 • 7842 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="#e4e2e2" /> </g> </svg> </span> <div id="Role-Tiny-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="Role-Tiny-2.002004"> <input type="hidden" name="author" value="HAARG"> <input type="hidden" name="distribution" value="Role-Tiny"> <button type="submit" class="favorite highlight"><span>71</span> ++</button> </form> </div> <div class="show-logged-out"> <button class="fav-not-logged-in favorite highlight"><span>71</span> ++</button> </div> / <span>Role::Tiny</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="#ROLE-COMPOSITION">ROLE COMPOSITION</a> <ul> <li><a href="#ROLE-METHODS">ROLE METHODS</a></li> </ul> </li> <li><a href="#IMPORTED-SUBROUTINES">IMPORTED SUBROUTINES</a> <ul> <li><a href="#requires">requires</a></li> <li><a href="#with">with</a></li> <li><a href="#before">before</a></li> <li><a href="#around">around</a></li> <li><a href="#after">after</a></li> <li><a href="#Strict-and-Warnings">Strict and Warnings</a></li> </ul> </li> <li><a href="#SUBROUTINES">SUBROUTINES</a> <ul> <li><a href="#does_role">does_role</a></li> </ul> </li> <li><a href="#METHODS">METHODS</a> <ul> <li><a href="#make_role">make_role</a></li> <li><a href="#apply_roles_to_package">apply_roles_to_package</a></li> <li><a href="#apply_roles_to_object">apply_roles_to_object</a></li> <li><a href="#create_class_with_roles">create_class_with_roles</a></li> <li><a href="#is_role">is_role</a></li> </ul> </li> <li><a href="#CAVEATS">CAVEATS</a></li> <li><a href="#SEE-ALSO">SEE ALSO</a></li> <li><a href="#AUTHOR">AUTHOR</a></li> <li><a href="#CONTRIBUTORS">CONTRIBUTORS</a></li> <li><a href="#COPYRIGHT">COPYRIGHT</a></li> <li><a href="#LICENSE">LICENSE</a></li> </ul></nav> <div class="pod anchors"> <h1 id="NAME">NAME</h1> <p>Role::Tiny - Roles: a nouvelle cuisine portion size slice of Moose</p> <h1 id="SYNOPSIS">SYNOPSIS</h1> <pre><code>package Some::Role; use Role::Tiny; sub foo { ... } sub bar { ... } around baz => sub { ... }; 1;</code></pre> <p>elsewhere</p> <pre><code>package Some::Class; use Role::Tiny::With; # bar gets imported, but not foo with 'Some::Role'; sub foo { ... } # baz is wrapped in the around modifier by Class::Method::Modifiers sub baz { ... } 1;</code></pre> <p>If you wanted attributes as well, look at <a href="/pod/Moo::Role">Moo::Role</a>.</p> <h1 id="DESCRIPTION">DESCRIPTION</h1> <p><code>Role::Tiny</code> is a minimalist role composition tool.</p> <h1 id="ROLE-COMPOSITION"><a id="ROLE"></a>ROLE COMPOSITION</h1> <p>Role composition can be thought of as much more clever and meaningful multiple inheritance. The basics of this implementation of roles is:</p> <ul> <li><p>If a method is already defined on a class, that method will not be composed in from the role. A method inherited by a class gets overridden by the role's method of the same name, though.</p> </li> <li><p>If a method that the role <a href="#requires">"requires"</a> to be implemented is not implemented, role application will fail loudly.</p> </li> </ul> <p>Unlike <a href="/pod/Class::C3">Class::C3</a>, where the <b>last</b> class inherited from "wins," role composition is the other way around, where the class wins. If multiple roles are applied in a single call (single with statement), then if any of their provided methods clash, an exception is raised unless the class provides a method since this conflict indicates a potential problem.</p> <h2 id="ROLE-METHODS"><a id="ROLE1"></a>ROLE METHODS</h2> <p>All subs created after importing Role::Tiny will be considered methods to be composed. For example:</p> <pre><code>package MyRole; use List::Util qw(min); sub mysub { } use Role::Tiny; use List::Util qw(max); sub mymethod { }</code></pre> <p>In this role, <code>max</code> and <code>mymethod</code> will be included when composing MyRole, and <code>min</code> and <code>mysub</code> will not. For additional control, <a href="/pod/namespace::clean">namespace::clean</a> can be used to exclude undesired subs from roles.</p> <h1 id="IMPORTED-SUBROUTINES"><a id="IMPORTED"></a>IMPORTED SUBROUTINES</h1> <h2 id="requires">requires</h2> <pre><code>requires qw(foo bar);</code></pre> <p>Declares a list of methods that must be defined to compose role.</p> <h2 id="with">with</h2> <pre><code>with 'Some::Role1'; with 'Some::Role1', 'Some::Role2';</code></pre> <p>Composes another role into the current role (or class via <a href="/pod/Role::Tiny::With">Role::Tiny::With</a>).</p> <p>If you have conflicts and want to resolve them in favour of Some::Role1 you can instead write:</p> <pre><code>with 'Some::Role1'; with 'Some::Role2';</code></pre> <p>If you have conflicts and want to resolve different conflicts in favour of different roles, please refactor your codebase.</p> <h2 id="before">before</h2> <pre><code>before foo => sub { ... };</code></pre> <p>See <a href="/pod/Class::Method::Modifiers#before-method(s)-%3D%3E-sub-%7B-...-%7D%3B">"before method(s) => sub { ... };" in Class::Method::Modifiers</a> for full documentation.</p> <p>Note that since you are not required to use method modifiers, <a href="/pod/Class::Method::Modifiers">Class::Method::Modifiers</a> is lazily loaded and we do not declare it as a dependency. If your <a href="/pod/Role::Tiny">Role::Tiny</a> role uses modifiers you must depend on both <a href="/pod/Class::Method::Modifiers">Class::Method::Modifiers</a> and <a href="/pod/Role::Tiny">Role::Tiny</a>.</p> <h2 id="around">around</h2> <pre><code>around foo => sub { ... };</code></pre> <p>See <a href="/pod/Class::Method::Modifiers#around-method(s)-%3D%3E-sub-%7B-...-%7D%3B">"around method(s) => sub { ... };" in Class::Method::Modifiers</a> for full documentation.</p> <p>Note that since you are not required to use method modifiers, <a href="/pod/Class::Method::Modifiers">Class::Method::Modifiers</a> is lazily loaded and we do not declare it as a dependency. If your <a href="/pod/Role::Tiny">Role::Tiny</a> role uses modifiers you must depend on both <a href="/pod/Class::Method::Modifiers">Class::Method::Modifiers</a> and <a href="/pod/Role::Tiny">Role::Tiny</a>.</p> <h2 id="after">after</h2> <pre><code>after foo => sub { ... };</code></pre> <p>See <a href="/pod/Class::Method::Modifiers#after-method(s)-%3D%3E-sub-%7B-...-%7D%3B">"after method(s) => sub { ... };" in Class::Method::Modifiers</a> for full documentation.</p> <p>Note that since you are not required to use method modifiers, <a href="/pod/Class::Method::Modifiers">Class::Method::Modifiers</a> is lazily loaded and we do not declare it as a dependency. If your <a href="/pod/Role::Tiny">Role::Tiny</a> role uses modifiers you must depend on both <a href="/pod/Class::Method::Modifiers">Class::Method::Modifiers</a> and <a href="/pod/Role::Tiny">Role::Tiny</a>.</p> <h2 id="Strict-and-Warnings"><a id="Strict"></a>Strict and Warnings</h2> <p>In addition to importing subroutines, using <code>Role::Tiny</code> applies <a href="/pod/strict">strict</a> and <a href="/pod/warnings">warnings</a> to the caller.</p> <h1 id="SUBROUTINES">SUBROUTINES</h1> <h2 id="does_role">does_role</h2> <pre><code>if (Role::Tiny::does_role($foo, 'Some::Role')) { ... }</code></pre> <p>Returns true if class has been composed with role.</p> <p>This subroutine is also installed as ->does on any class a Role::Tiny is composed into unless that class already has an ->does method, so</p> <pre><code>if ($foo->does('Some::Role')) { ... }</code></pre> <p>will work for classes but to test a role, one must use ::does_role directly.</p> <p>Additionally, Role::Tiny will override the standard Perl <code>DOES</code> method for your class. However, if <code>any</code> class in your class' inheritance hierarchy provides <code>DOES</code>, then Role::Tiny will not override it.</p> <h1 id="METHODS">METHODS</h1> <h2 id="make_role">make_role</h2> <pre><code>Role::Tiny->make_role('Some::Role');</code></pre> <p>Makes a package into a role, but does not export any subs into it.</p> <h2 id="apply_roles_to_package">apply_roles_to_package</h2> <pre><code>Role::Tiny->apply_roles_to_package( 'Some::Package', 'Some::Role', 'Some::Other::Role' );</code></pre> <p>Composes role with package. See also <a href="/pod/Role::Tiny::With">Role::Tiny::With</a>.</p> <h2 id="apply_roles_to_object">apply_roles_to_object</h2> <pre><code>Role::Tiny->apply_roles_to_object($foo, qw(Some::Role1 Some::Role2));</code></pre> <p>Composes roles in order into object directly. Object is reblessed into the resulting class. Note that the object's methods get overridden by the role's ones with the same names.</p> <h2 id="create_class_with_roles">create_class_with_roles</h2> <pre><code>Role::Tiny->create_class_with_roles('Some::Base', qw(Some::Role1 Some::Role2));</code></pre> <p>Creates a new class based on base, with the roles composed into it in order. New class is returned.</p> <h2 id="is_role">is_role</h2> <pre><code>Role::Tiny->is_role('Some::Role1')</code></pre> <p>Returns true if the given package is a role.</p> <h1 id="CAVEATS">CAVEATS</h1> <ul> <li><p>On perl 5.8.8 and earlier, applying a role to an object won't apply any overloads from the role to other copies of the object.</p> </li> <li><p>On perl 5.16 and earlier, applying a role to a class won't apply any overloads from the role to any existing instances of the class.</p> </li> </ul> <h1 id="SEE-ALSO"><a id="SEE"></a>SEE ALSO</h1> <p><a href="/pod/Role::Tiny">Role::Tiny</a> is the attribute-less subset of <a href="/pod/Moo::Role">Moo::Role</a>; <a href="/pod/Moo::Role">Moo::Role</a> is a meta-protocol-less subset of the king of role systems, <a href="/pod/Moose::Role">Moose::Role</a>.</p> <p>Ovid's <a href="/pod/Role::Basic">Role::Basic</a> provides roles with a similar scope, but without method modifiers, and having some extra usage restrictions.</p> <h1 id="AUTHOR">AUTHOR</h1> <p>mst - Matt S. Trout (cpan:MSTROUT) <mst@shadowcat.co.uk></p> <h1 id="CONTRIBUTORS">CONTRIBUTORS</h1> <p>dg - David Leadbeater (cpan:DGL) <dgl@dgl.cx></p> <p>frew - Arthur Axel "fREW" Schmidt (cpan:FREW) <frioux@gmail.com></p> <p>hobbs - Andrew Rodland (cpan:ARODLAND) <arodland@cpan.org></p> <p>jnap - John Napiorkowski (cpan:JJNAPIORK) <jjn1056@yahoo.com></p> <p>ribasushi - Peter Rabbitson (cpan:RIBASUSHI) <ribasushi@cpan.org></p> <p>chip - Chip Salzenberg (cpan:CHIPS) <chip@pobox.com></p> <p>ajgb - Alex J. G. Burzyński (cpan:AJGB) <ajgb@cpan.org></p> <p>doy - Jesse Luehrs (cpan:DOY) <doy at tozt dot net></p> <p>perigrin - Chris Prather (cpan:PERIGRIN) <chris@prather.org></p> <p>Mithaldu - Christian Walde (cpan:MITHALDU) <walde.christian@googlemail.com></p> <p>ilmari - Dagfinn Ilmari Mannsåker (cpan:ILMARI) <ilmari@ilmari.org></p> <p>tobyink - Toby Inkster (cpan:TOBYINK) <tobyink@cpan.org></p> <p>haarg - Graham Knop (cpan:HAARG) <haarg@haarg.org></p> <h1 id="COPYRIGHT">COPYRIGHT</h1> <p>Copyright (c) 2010-2012 the Role::Tiny <a href="#AUTHOR">"AUTHOR"</a> and <a href="#CONTRIBUTORS">"CONTRIBUTORS"</a> as listed above.</p> <h1 id="LICENSE">LICENSE</h1> <p>This library is free software and may be distributed 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 Role::Tiny, 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 Role::Tiny</code></pre> <p><a href="/pod/CPAN">CPAN shell</a></p> <pre><code>perl -MCPAN -e shell install Role::Tiny</code></pre> <p>For more information on module installation, please visit <a href="https://www.cpan.org/modules/INSTALL.html">the detailed CPAN module installation guide</a>.</p> </div> <div class="modal-footer"> <a href="#" data-dismiss="modal" class="btn">Close</a> </div> </div> </div> </div> </main> <div class="content-pagination"> </div> </div> <footer class="footer"> <div class="footer-container"> <div class="footer-social"> <div class="footer-link footer-logo"> <a href="/"> <img src="/static/images/metacpan-logo.svg" alt="MetaCPAN" /> </a> </div> <a class="footer-social-link" href="https://github.com/metacpan"> <i 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