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Michele Caini 74f3ad98f0 API reference v2.6.0
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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_1ResourceHandle.html">ResourceHandle</a></li> </ul>
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<div class="title">entt::ResourceHandle&lt; Resource &gt; Class Template Reference<span class="mlabels"><span class="mlabel">final</span></span></div> </div>
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<p>Shared resource handle.
<a href="classentt_1_1ResourceHandle.html#details">More...</a></p>
<p><code>#include &lt;<a class="el" href="handle_8hpp_source.html">handle.hpp</a>&gt;</code></p>
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Public Member Functions</h2></td></tr>
<tr class="memitem:a7b267f802e92b57dcc750f824fd5e3df"><td class="memItemLeft" align="right" valign="top"><a id="a7b267f802e92b57dcc750f824fd5e3df"></a>
&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classentt_1_1ResourceHandle.html#a7b267f802e92b57dcc750f824fd5e3df">ResourceHandle</a> (const <a class="el" href="classentt_1_1ResourceHandle.html">ResourceHandle</a> &amp;) ENTT_NOEXCEPT=default</td></tr>
<tr class="memdesc:a7b267f802e92b57dcc750f824fd5e3df"><td class="mdescLeft">&#160;</td><td class="mdescRight">Default copy constructor. <br /></td></tr>
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&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classentt_1_1ResourceHandle.html#a4d5c929ea7f0bd8860d7188aa6fb76a8">ResourceHandle</a> (<a class="el" href="classentt_1_1ResourceHandle.html">ResourceHandle</a> &amp;&amp;) ENTT_NOEXCEPT=default</td></tr>
<tr class="memdesc:a4d5c929ea7f0bd8860d7188aa6fb76a8"><td class="mdescLeft">&#160;</td><td class="mdescRight">Default move constructor. <br /></td></tr>
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<tr class="memitem:a017670d5037cf65ea0b81b5c094004ac"><td class="memItemLeft" align="right" valign="top"><a class="el" href="classentt_1_1ResourceHandle.html">ResourceHandle</a> &amp;&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classentt_1_1ResourceHandle.html#a017670d5037cf65ea0b81b5c094004ac">operator=</a> (const <a class="el" href="classentt_1_1ResourceHandle.html">ResourceHandle</a> &amp;) ENTT_NOEXCEPT=default</td></tr>
<tr class="memdesc:a017670d5037cf65ea0b81b5c094004ac"><td class="mdescLeft">&#160;</td><td class="mdescRight">Default copy assignment operator. <a href="#a017670d5037cf65ea0b81b5c094004ac">More...</a><br /></td></tr>
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<tr class="memitem:a5c6a854be6eca84bd76d8e05f05f657b"><td class="memItemLeft" align="right" valign="top"><a class="el" href="classentt_1_1ResourceHandle.html">ResourceHandle</a> &amp;&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classentt_1_1ResourceHandle.html#a5c6a854be6eca84bd76d8e05f05f657b">operator=</a> (<a class="el" href="classentt_1_1ResourceHandle.html">ResourceHandle</a> &amp;&amp;) ENTT_NOEXCEPT=default</td></tr>
<tr class="memdesc:a5c6a854be6eca84bd76d8e05f05f657b"><td class="mdescLeft">&#160;</td><td class="mdescRight">Default move assignment operator. <a href="#a5c6a854be6eca84bd76d8e05f05f657b">More...</a><br /></td></tr>
<tr class="separator:a5c6a854be6eca84bd76d8e05f05f657b"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a32e791c4556d040273643ca5f42755a9"><td class="memItemLeft" align="right" valign="top">const Resource &amp;&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classentt_1_1ResourceHandle.html#a32e791c4556d040273643ca5f42755a9">get</a> () const ENTT_NOEXCEPT</td></tr>
<tr class="memdesc:a32e791c4556d040273643ca5f42755a9"><td class="mdescLeft">&#160;</td><td class="mdescRight">Gets a reference to the managed resource. <a href="#a32e791c4556d040273643ca5f42755a9">More...</a><br /></td></tr>
<tr class="separator:a32e791c4556d040273643ca5f42755a9"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:aa728424029a170454b7e61056af0926a"><td class="memItemLeft" align="right" valign="top">&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classentt_1_1ResourceHandle.html#aa728424029a170454b7e61056af0926a">operator const Resource &amp;</a> () const ENTT_NOEXCEPT</td></tr>
<tr class="memdesc:aa728424029a170454b7e61056af0926a"><td class="mdescLeft">&#160;</td><td class="mdescRight">Casts a handle and gets a reference to the managed resource. <a href="#aa728424029a170454b7e61056af0926a">More...</a><br /></td></tr>
<tr class="separator:aa728424029a170454b7e61056af0926a"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a737a5c2e623d30f372ba4876fe3d0fd3"><td class="memItemLeft" align="right" valign="top">const Resource &amp;&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classentt_1_1ResourceHandle.html#a737a5c2e623d30f372ba4876fe3d0fd3">operator*</a> () const ENTT_NOEXCEPT</td></tr>
<tr class="memdesc:a737a5c2e623d30f372ba4876fe3d0fd3"><td class="mdescLeft">&#160;</td><td class="mdescRight">Dereferences a handle to obtain the managed resource. <a href="#a737a5c2e623d30f372ba4876fe3d0fd3">More...</a><br /></td></tr>
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<tr class="memitem:a55727b34cb2bcbff11a680bae2fd793e"><td class="memItemLeft" align="right" valign="top">const Resource *&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classentt_1_1ResourceHandle.html#a55727b34cb2bcbff11a680bae2fd793e">operator-&gt;</a> () const ENTT_NOEXCEPT</td></tr>
<tr class="memdesc:a55727b34cb2bcbff11a680bae2fd793e"><td class="mdescLeft">&#160;</td><td class="mdescRight">Gets a pointer to the managed resource from a handle . <a href="#a55727b34cb2bcbff11a680bae2fd793e">More...</a><br /></td></tr>
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<tr class="memitem:a4da18e304419e8d070fbc095236b4403"><td class="memItemLeft" align="right" valign="top"><a id="a4da18e304419e8d070fbc095236b4403"></a>
&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classentt_1_1ResourceHandle.html#a4da18e304419e8d070fbc095236b4403">operator bool</a> () const</td></tr>
<tr class="memdesc:a4da18e304419e8d070fbc095236b4403"><td class="mdescLeft">&#160;</td><td class="mdescRight">Returns true if the handle contains a resource, false otherwise. <br /></td></tr>
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Friends</h2></td></tr>
<tr class="memitem:a302c9d1bd54cf8e7e958d5e505773b23"><td class="memItemLeft" align="right" valign="top"><a id="a302c9d1bd54cf8e7e958d5e505773b23"></a>
class&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classentt_1_1ResourceHandle.html#a302c9d1bd54cf8e7e958d5e505773b23">ResourceCache&lt; Resource &gt;</a></td></tr>
<tr class="memdesc:a302c9d1bd54cf8e7e958d5e505773b23"><td class="mdescLeft">&#160;</td><td class="mdescRight">Resource handles are friends of their caches. <br /></td></tr>
<tr class="separator:a302c9d1bd54cf8e7e958d5e505773b23"><td class="memSeparator" colspan="2">&#160;</td></tr>
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<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<div class="textblock"><h3>template&lt;typename Resource&gt;<br />
class entt::ResourceHandle&lt; Resource &gt;</h3>
<p>Shared resource handle. </p>
<p>A shared resource handle is a small class that wraps a resource and keeps it alive even if it's deleted from the cache. It can be either copied or moved. A handle shares a reference to the same resource with all the other handles constructed for the same identifier.<br />
As a rule of thumb, resources should never be copied nor moved. Handles are the way to go to keep references to them.</p>
<dl class="tparams"><dt>Template Parameters</dt><dd>
<table class="tparams">
<tr><td class="paramname">Resource</td><td>Type of resource managed by a handle. </td></tr>
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</dd>
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<p class="definition">Definition at line <a class="el" href="handle_8hpp_source.html#l00031">31</a> of file <a class="el" href="handle_8hpp_source.html">handle.hpp</a>.</p>
</div><h2 class="groupheader">Member Function Documentation</h2>
<a id="a32e791c4556d040273643ca5f42755a9"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a32e791c4556d040273643ca5f42755a9">&#9670;&nbsp;</a></span>get()</h2>
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<p>Gets a reference to the managed resource. </p>
<dl class="section warning"><dt>Warning</dt><dd>The behavior is undefined if the handle doesn't contain a resource.<br />
An assertion will abort the execution at runtime in debug mode if the handle is empty.</dd></dl>
<dl class="section return"><dt>Returns</dt><dd>A reference to the managed resource. </dd></dl>
<p class="definition">Definition at line <a class="el" href="handle_8hpp_source.html#l00060">60</a> of file <a class="el" href="handle_8hpp_source.html">handle.hpp</a>.</p>
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<a id="aa728424029a170454b7e61056af0926a"></a>
<h2 class="memtitle"><span class="permalink"><a href="#aa728424029a170454b7e61056af0926a">&#9670;&nbsp;</a></span>operator const Resource &()</h2>
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template&lt;typename Resource &gt; </div>
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<p>Casts a handle and gets a reference to the managed resource. </p>
<dl class="section warning"><dt>Warning</dt><dd>The behavior is undefined if the handle doesn't contain a resource.<br />
An assertion will abort the execution at runtime in debug mode if the handle is empty. </dd></dl>
<p class="definition">Definition at line <a class="el" href="handle_8hpp_source.html#l00073">73</a> of file <a class="el" href="handle_8hpp_source.html">handle.hpp</a>.</p>
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<a id="a737a5c2e623d30f372ba4876fe3d0fd3"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a737a5c2e623d30f372ba4876fe3d0fd3">&#9670;&nbsp;</a></span>operator*()</h2>
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<td class="paramname"></td><td>)</td>
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<p>Dereferences a handle to obtain the managed resource. </p>
<dl class="section warning"><dt>Warning</dt><dd>The behavior is undefined if the handle doesn't contain a resource.<br />
An assertion will abort the execution at runtime in debug mode if the handle is empty.</dd></dl>
<dl class="section return"><dt>Returns</dt><dd>A reference to the managed resource. </dd></dl>
<p class="definition">Definition at line <a class="el" href="handle_8hpp_source.html#l00085">85</a> of file <a class="el" href="handle_8hpp_source.html">handle.hpp</a>.</p>
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<h2 class="memtitle"><span class="permalink"><a href="#a55727b34cb2bcbff11a680bae2fd793e">&#9670;&nbsp;</a></span>operator->()</h2>
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<p>Gets a pointer to the managed resource from a handle . </p>
<dl class="section warning"><dt>Warning</dt><dd>The behavior is undefined if the handle doesn't contain a resource.<br />
An assertion will abort the execution at runtime in debug mode if the handle is empty.</dd></dl>
<dl class="section return"><dt>Returns</dt><dd>A pointer to the managed resource or <code>nullptr</code> if the handle contains no resource at all. </dd></dl>
<p class="definition">Definition at line <a class="el" href="handle_8hpp_source.html#l00098">98</a> of file <a class="el" href="handle_8hpp_source.html">handle.hpp</a>.</p>
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<h2 class="memtitle"><span class="permalink"><a href="#a017670d5037cf65ea0b81b5c094004ac">&#9670;&nbsp;</a></span>operator=() <span class="overload">[1/2]</span></h2>
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<td>(</td>
<td class="paramtype">const <a class="el" href="classentt_1_1ResourceHandle.html">ResourceHandle</a>&lt; Resource &gt; &amp;&#160;</td>
<td class="paramname"></td><td>)</td>
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<p>Default copy assignment operator. </p>
<dl class="section return"><dt>Returns</dt><dd>This handle. </dd></dl>
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<h2 class="memtitle"><span class="permalink"><a href="#a5c6a854be6eca84bd76d8e05f05f657b">&#9670;&nbsp;</a></span>operator=() <span class="overload">[2/2]</span></h2>
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<td class="memname"><a class="el" href="classentt_1_1ResourceHandle.html">ResourceHandle</a>&amp; <a class="el" href="classentt_1_1ResourceHandle.html">entt::ResourceHandle</a>&lt; Resource &gt;::operator= </td>
<td>(</td>
<td class="paramtype"><a class="el" href="classentt_1_1ResourceHandle.html">ResourceHandle</a>&lt; Resource &gt; &amp;&amp;&#160;</td>
<td class="paramname"></td><td>)</td>
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<p>Default move assignment operator. </p>
<dl class="section return"><dt>Returns</dt><dd>This handle. </dd></dl>
</div>
</div>
<hr/>The documentation for this class was generated from the following file:<ul>
<li>src/entt/resource/<a class="el" href="handle_8hpp_source.html">handle.hpp</a></li>
</ul>
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