116 lines
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116 lines
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 <span id="projectnumber">2.4.2</span>
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<li class="navelem"><a class="el" href="namespaceentt.html">entt</a></li><li class="navelem"><a class="el" href="classentt_1_1ResourceLoader.html">ResourceLoader</a></li> </ul>
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<a href="#friends">Friends</a> |
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<div class="title">entt::ResourceLoader< Loader, Resource > Class Template Reference</div> </div>
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<p>Base class for resource loaders.
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<a href="classentt_1_1ResourceLoader.html#details">More...</a></p>
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<p><code>#include <<a class="el" href="loader_8hpp_source.html">loader.hpp</a>></code></p>
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<table class="memberdecls">
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<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="friends"></a>
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Friends</h2></td></tr>
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<tr class="memitem:a302c9d1bd54cf8e7e958d5e505773b23"><td class="memItemLeft" align="right" valign="top"><a id="a302c9d1bd54cf8e7e958d5e505773b23"></a>
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class </td><td class="memItemRight" valign="bottom"><a class="el" href="classentt_1_1ResourceLoader.html#a302c9d1bd54cf8e7e958d5e505773b23">ResourceCache< Resource ></a></td></tr>
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<tr class="memdesc:a302c9d1bd54cf8e7e958d5e505773b23"><td class="mdescLeft"> </td><td class="mdescRight">Resource loaders are friends of their caches. <br /></td></tr>
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<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
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<div class="textblock"><h3>template<typename Loader, typename Resource><br />
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class entt::ResourceLoader< Loader, Resource ></h3>
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<p>Base class for resource loaders. </p>
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<p>Resource loaders must inherit from this class and stay true to the CRTP idiom. Moreover, a resource loader must expose a public, const member function named <code>load</code> that accepts a variable number of arguments and return a shared pointer to the resource just created.<br />
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As an example:</p>
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<div class="fragment"><div class="line"><span class="keyword">struct </span>MyResource {};</div><div class="line"></div><div class="line"><span class="keyword">struct </span>MyLoader: <a class="code" href="classentt_1_1ResourceLoader.html">entt::ResourceLoader</a><MyLoader, MyResource> {</div><div class="line"> std::shared_ptr<MyResource> load(<span class="keywordtype">int</span>)<span class="keyword"> const </span>{</div><div class="line"> <span class="comment">// use the integer value somehow</span></div><div class="line"> <span class="keywordflow">return</span> std::make_shared<MyResource>();</div><div class="line"> }</div><div class="line">};</div></div><!-- fragment --><p>In general, resource loaders should not have a state or retain data of any type. They should let the cache manage their resources instead.</p>
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<dl class="section note"><dt>Note</dt><dd>Base class and CRTP idiom aren't strictly required with the current implementation. One could argue that a cache can easily work with loaders of any type. However, future changes won't be breaking ones by forcing the use of a base class today and that's why the model is already in its place.</dd></dl>
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<dl class="tparams"><dt>Template Parameters</dt><dd>
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<table class="tparams">
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<tr><td class="paramname">Loader</td><td>Type of the derived class. </td></tr>
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<tr><td class="paramname">Resource</td><td>Type of resource for which to use the loader. </td></tr>
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</table>
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</dd>
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</dl>
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<p class="definition">Definition at line <a class="el" href="loader_8hpp_source.html#l00048">48</a> of file <a class="el" href="loader_8hpp_source.html">loader.hpp</a>.</p>
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</div><hr/>The documentation for this class was generated from the following file:<ul>
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<li>src/entt/resource/<a class="el" href="loader_8hpp_source.html">loader.hpp</a></li>
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