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Michele Caini ac9898a174 API reference v3.3.0
2020-02-22 15:45:18 +01:00

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&#160;<span id="projectnumber">3.3.0</span>
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<li class="navelem"><a class="el" href="namespaceentt.html">entt</a></li><li class="navelem"><a class="el" href="structentt_1_1meta__func.html">meta_func</a></li> </ul>
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<a href="#pub-types">Public Types</a> &#124;
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<div class="title">entt::meta_func Struct Reference</div> </div>
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<p>Opaque container for meta functions.
<a href="structentt_1_1meta__func.html#details">More...</a></p>
<p><code>#include &lt;<a class="el" href="meta_8hpp_source.html">meta.hpp</a>&gt;</code></p>
<table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pub-types"></a>
Public Types</h2></td></tr>
<tr class="memitem:a422ec572c7c56d3cb46d09704be64f65"><td class="memItemLeft" align="right" valign="top"><a id="a422ec572c7c56d3cb46d09704be64f65"></a>
using&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="structentt_1_1meta__func.html#a422ec572c7c56d3cb46d09704be64f65">size_type</a> = typename internal::meta_func_node::size_type</td></tr>
<tr class="memdesc:a422ec572c7c56d3cb46d09704be64f65"><td class="mdescLeft">&#160;</td><td class="mdescRight">Unsigned integer type. <br /></td></tr>
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Public Member Functions</h2></td></tr>
<tr class="memitem:a08cf20d2ec99cca580d1121aeed7064c"><td class="memItemLeft" align="right" valign="top">&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="structentt_1_1meta__func.html#a08cf20d2ec99cca580d1121aeed7064c">meta_func</a> (const internal::meta_func_node *curr=nullptr) ENTT_NOEXCEPT</td></tr>
<tr class="memdesc:a08cf20d2ec99cca580d1121aeed7064c"><td class="mdescLeft">&#160;</td><td class="mdescRight">Constructs an instance from a given node. <a href="structentt_1_1meta__func.html#a08cf20d2ec99cca580d1121aeed7064c">More...</a><br /></td></tr>
<tr class="separator:a08cf20d2ec99cca580d1121aeed7064c"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ac4af350ed8158ff46761e5812593756d"><td class="memItemLeft" align="right" valign="top">ENTT_ID_TYPE&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="structentt_1_1meta__func.html#ac4af350ed8158ff46761e5812593756d">alias</a> () const ENTT_NOEXCEPT</td></tr>
<tr class="memdesc:ac4af350ed8158ff46761e5812593756d"><td class="mdescLeft">&#160;</td><td class="mdescRight">Returns the alias assigned to a given meta object. <a href="structentt_1_1meta__func.html#ac4af350ed8158ff46761e5812593756d">More...</a><br /></td></tr>
<tr class="separator:ac4af350ed8158ff46761e5812593756d"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a5aaf8cb2a1ad0be02d0b7f4824f92f69"><td class="memItemLeft" align="right" valign="top">ENTT_ID_TYPE&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="structentt_1_1meta__func.html#a5aaf8cb2a1ad0be02d0b7f4824f92f69">identifier</a> () const ENTT_NOEXCEPT</td></tr>
<tr class="memdesc:a5aaf8cb2a1ad0be02d0b7f4824f92f69"><td class="mdescLeft">&#160;</td><td class="mdescRight">Returns the alias assigned to a given meta object. <a href="structentt_1_1meta__func.html#a5aaf8cb2a1ad0be02d0b7f4824f92f69">More...</a><br /></td></tr>
<tr class="separator:a5aaf8cb2a1ad0be02d0b7f4824f92f69"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a63056a4d3f0a16c988d90162240fe74d"><td class="memItemLeft" align="right" valign="top"><a class="el" href="classentt_1_1meta__type.html">meta_type</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="structentt_1_1meta__func.html#a63056a4d3f0a16c988d90162240fe74d">parent</a> () const ENTT_NOEXCEPT</td></tr>
<tr class="memdesc:a63056a4d3f0a16c988d90162240fe74d"><td class="mdescLeft">&#160;</td><td class="mdescRight">Returns the meta type to which a meta object belongs. <a href="structentt_1_1meta__func.html#a63056a4d3f0a16c988d90162240fe74d">More...</a><br /></td></tr>
<tr class="separator:a63056a4d3f0a16c988d90162240fe74d"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ae4bc5f5e90003362872d8cd056b2f689"><td class="memItemLeft" align="right" valign="top"><a class="el" href="structentt_1_1meta__func.html#a422ec572c7c56d3cb46d09704be64f65">size_type</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="structentt_1_1meta__func.html#ae4bc5f5e90003362872d8cd056b2f689">size</a> () const ENTT_NOEXCEPT</td></tr>
<tr class="memdesc:ae4bc5f5e90003362872d8cd056b2f689"><td class="mdescLeft">&#160;</td><td class="mdescRight">Returns the number of arguments accepted by a meta function. <a href="structentt_1_1meta__func.html#ae4bc5f5e90003362872d8cd056b2f689">More...</a><br /></td></tr>
<tr class="separator:ae4bc5f5e90003362872d8cd056b2f689"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a93c1f9ba3252788f9ac470f6ad6e3fb9"><td class="memItemLeft" align="right" valign="top">bool&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="structentt_1_1meta__func.html#a93c1f9ba3252788f9ac470f6ad6e3fb9">is_const</a> () const ENTT_NOEXCEPT</td></tr>
<tr class="memdesc:a93c1f9ba3252788f9ac470f6ad6e3fb9"><td class="mdescLeft">&#160;</td><td class="mdescRight">Indicates whether a given meta function is constant or not. <a href="structentt_1_1meta__func.html#a93c1f9ba3252788f9ac470f6ad6e3fb9">More...</a><br /></td></tr>
<tr class="separator:a93c1f9ba3252788f9ac470f6ad6e3fb9"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a8faf171039dc72ea51d94acc2c2ea249"><td class="memItemLeft" align="right" valign="top">bool&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="structentt_1_1meta__func.html#a8faf171039dc72ea51d94acc2c2ea249">is_static</a> () const ENTT_NOEXCEPT</td></tr>
<tr class="memdesc:a8faf171039dc72ea51d94acc2c2ea249"><td class="mdescLeft">&#160;</td><td class="mdescRight">Indicates whether a given meta function is static or not. <a href="structentt_1_1meta__func.html#a8faf171039dc72ea51d94acc2c2ea249">More...</a><br /></td></tr>
<tr class="separator:a8faf171039dc72ea51d94acc2c2ea249"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a6a1bfe7f9b2e8c833dbfb5dff75bf1e9"><td class="memItemLeft" align="right" valign="top"><a class="el" href="classentt_1_1meta__type.html">meta_type</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="structentt_1_1meta__func.html#a6a1bfe7f9b2e8c833dbfb5dff75bf1e9">ret</a> () const ENTT_NOEXCEPT</td></tr>
<tr class="memdesc:a6a1bfe7f9b2e8c833dbfb5dff75bf1e9"><td class="mdescLeft">&#160;</td><td class="mdescRight">Returns the meta type of the return type of a meta function. <a href="structentt_1_1meta__func.html#a6a1bfe7f9b2e8c833dbfb5dff75bf1e9">More...</a><br /></td></tr>
<tr class="separator:a6a1bfe7f9b2e8c833dbfb5dff75bf1e9"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a34709d9f0a7498382ced3a4e2daa64ba"><td class="memItemLeft" align="right" valign="top"><a class="el" href="classentt_1_1meta__type.html">meta_type</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="structentt_1_1meta__func.html#a34709d9f0a7498382ced3a4e2daa64ba">arg</a> (<a class="el" href="structentt_1_1meta__func.html#a422ec572c7c56d3cb46d09704be64f65">size_type</a> index) const ENTT_NOEXCEPT</td></tr>
<tr class="memdesc:a34709d9f0a7498382ced3a4e2daa64ba"><td class="mdescLeft">&#160;</td><td class="mdescRight">Returns the meta type of the i-th argument of a meta function. <a href="structentt_1_1meta__func.html#a34709d9f0a7498382ced3a4e2daa64ba">More...</a><br /></td></tr>
<tr class="separator:a34709d9f0a7498382ced3a4e2daa64ba"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ae7848863edc986a2196d376111ec4293"><td class="memTemplParams" colspan="2">template&lt;typename... Args&gt; </td></tr>
<tr class="memitem:ae7848863edc986a2196d376111ec4293"><td class="memTemplItemLeft" align="right" valign="top"><a class="el" href="classentt_1_1meta__any.html">meta_any</a>&#160;</td><td class="memTemplItemRight" valign="bottom"><a class="el" href="structentt_1_1meta__func.html#ae7848863edc986a2196d376111ec4293">invoke</a> (<a class="el" href="structentt_1_1meta__handle.html">meta_handle</a> instance, Args &amp;&amp;... args) const</td></tr>
<tr class="memdesc:ae7848863edc986a2196d376111ec4293"><td class="mdescLeft">&#160;</td><td class="mdescRight">Invokes the underlying function, if possible. <a href="structentt_1_1meta__func.html#ae7848863edc986a2196d376111ec4293">More...</a><br /></td></tr>
<tr class="separator:ae7848863edc986a2196d376111ec4293"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a7208941ed4bc49afa74a3867a66f93ee"><td class="memTemplParams" colspan="2">template&lt;typename Op &gt; </td></tr>
<tr class="memitem:a7208941ed4bc49afa74a3867a66f93ee"><td class="memTemplItemLeft" align="right" valign="top">std::enable_if_t&lt; std::is_invocable_v&lt; Op, <a class="el" href="structentt_1_1meta__prop.html">meta_prop</a> &gt;, void &gt;&#160;</td><td class="memTemplItemRight" valign="bottom"><a class="el" href="structentt_1_1meta__func.html#a7208941ed4bc49afa74a3867a66f93ee">prop</a> (Op op) const</td></tr>
<tr class="memdesc:a7208941ed4bc49afa74a3867a66f93ee"><td class="mdescLeft">&#160;</td><td class="mdescRight">Iterates all the properties assigned to a meta function. <a href="structentt_1_1meta__func.html#a7208941ed4bc49afa74a3867a66f93ee">More...</a><br /></td></tr>
<tr class="separator:a7208941ed4bc49afa74a3867a66f93ee"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a78c007b0f307c817ae519004b14d3ea0"><td class="memItemLeft" align="right" valign="top"><a class="el" href="structentt_1_1meta__prop.html">meta_prop</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="structentt_1_1meta__func.html#a78c007b0f307c817ae519004b14d3ea0">prop</a> (<a class="el" href="classentt_1_1meta__any.html">meta_any</a> key) const</td></tr>
<tr class="memdesc:a78c007b0f307c817ae519004b14d3ea0"><td class="mdescLeft">&#160;</td><td class="mdescRight">Returns the property associated with a given key. <a href="structentt_1_1meta__func.html#a78c007b0f307c817ae519004b14d3ea0">More...</a><br /></td></tr>
<tr class="separator:a78c007b0f307c817ae519004b14d3ea0"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a436c57daae914c9222de41c7b7678584"><td class="memItemLeft" align="right" valign="top">&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="structentt_1_1meta__func.html#a436c57daae914c9222de41c7b7678584">operator bool</a> () const ENTT_NOEXCEPT</td></tr>
<tr class="memdesc:a436c57daae914c9222de41c7b7678584"><td class="mdescLeft">&#160;</td><td class="mdescRight">Returns true if a meta object is valid, false otherwise. <a href="structentt_1_1meta__func.html#a436c57daae914c9222de41c7b7678584">More...</a><br /></td></tr>
<tr class="separator:a436c57daae914c9222de41c7b7678584"><td class="memSeparator" colspan="2">&#160;</td></tr>
</table>
<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<div class="textblock"><p>Opaque container for meta functions. </p>
<p class="definition">Definition at line <a class="el" href="meta_8hpp_source.html#l01009">1009</a> of file <a class="el" href="meta_8hpp_source.html">meta.hpp</a>.</p>
</div><h2 class="groupheader">Constructor &amp; Destructor Documentation</h2>
<a id="a08cf20d2ec99cca580d1121aeed7064c"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a08cf20d2ec99cca580d1121aeed7064c">&#9670;&nbsp;</a></span>meta_func()</h2>
<div class="memitem">
<div class="memproto">
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<td class="memname">entt::meta_func::meta_func </td>
<td>(</td>
<td class="paramtype">const internal::meta_func_node *&#160;</td>
<td class="paramname"><em>curr</em> = <code>nullptr</code></td><td>)</td>
<td></td>
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<p>Constructs an instance from a given node. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">curr</td><td>The underlying node with which to construct the instance. </td></tr>
</table>
</dd>
</dl>
<p class="definition">Definition at line <a class="el" href="meta_8hpp_source.html#l01014">1014</a> of file <a class="el" href="meta_8hpp_source.html">meta.hpp</a>.</p>
</div>
</div>
<h2 class="groupheader">Member Function Documentation</h2>
<a id="ac4af350ed8158ff46761e5812593756d"></a>
<h2 class="memtitle"><span class="permalink"><a href="#ac4af350ed8158ff46761e5812593756d">&#9670;&nbsp;</a></span>alias()</h2>
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<td class="memname">ENTT_ID_TYPE entt::meta_func::alias </td>
<td>(</td>
<td class="paramname"></td><td>)</td>
<td> const</td>
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<p>Returns the alias assigned to a given meta object. </p>
<dl class="section return"><dt>Returns</dt><dd>The alias assigned to the meta object. </dd></dl>
<p class="definition">Definition at line <a class="el" href="meta_8hpp_source.html#l01019">1019</a> of file <a class="el" href="meta_8hpp_source.html">meta.hpp</a>.</p>
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<a id="a34709d9f0a7498382ced3a4e2daa64ba"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a34709d9f0a7498382ced3a4e2daa64ba">&#9670;&nbsp;</a></span>arg()</h2>
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<td class="memname"><a class="el" href="classentt_1_1meta__type.html">meta_type</a> entt::meta_func::arg </td>
<td>(</td>
<td class="paramtype"><a class="el" href="structentt_1_1meta__func.html#a422ec572c7c56d3cb46d09704be64f65">size_type</a>&#160;</td>
<td class="paramname"><em>index</em></td><td>)</td>
<td> const</td>
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<p>Returns the meta type of the i-th argument of a meta function. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">index</td><td>The index of the argument of which to return the meta type. </td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>The meta type of the i-th argument of a meta function, if any. </dd></dl>
<p class="definition">Definition at line <a class="el" href="meta_8hpp_source.html#l01564">1564</a> of file <a class="el" href="meta_8hpp_source.html">meta.hpp</a>.</p>
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<a id="a5aaf8cb2a1ad0be02d0b7f4824f92f69"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a5aaf8cb2a1ad0be02d0b7f4824f92f69">&#9670;&nbsp;</a></span>identifier()</h2>
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<td class="memname">ENTT_ID_TYPE entt::meta_func::identifier </td>
<td>(</td>
<td class="paramname"></td><td>)</td>
<td> const</td>
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<p>Returns the alias assigned to a given meta object. </p>
<dl class="section return"><dt>Returns</dt><dd>The alias assigned to the meta object. </dd></dl>
<p class="definition">Definition at line <a class="el" href="meta_8hpp_source.html#l01025">1025</a> of file <a class="el" href="meta_8hpp_source.html">meta.hpp</a>.</p>
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<a id="ae7848863edc986a2196d376111ec4293"></a>
<h2 class="memtitle"><span class="permalink"><a href="#ae7848863edc986a2196d376111ec4293">&#9670;&nbsp;</a></span>invoke()</h2>
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template&lt;typename... Args&gt; </div>
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<td class="memname"><a class="el" href="classentt_1_1meta__any.html">meta_any</a> entt::meta_func::invoke </td>
<td>(</td>
<td class="paramtype"><a class="el" href="structentt_1_1meta__handle.html">meta_handle</a>&#160;</td>
<td class="paramname"><em>instance</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">Args &amp;&amp;...&#160;</td>
<td class="paramname"><em>args</em>&#160;</td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td> const</td>
</tr>
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<p>Invokes the underlying function, if possible. </p>
<p>To invoke a meta function, the parameters must be such that a cast or conversion to the required types is possible. Otherwise, an empty and thus invalid container is returned.<br />
It must be possible to cast the instance to the parent type of the meta function. Otherwise, invoking the underlying function results in an undefined behavior.</p>
<dl class="tparams"><dt>Template Parameters</dt><dd>
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<tr><td class="paramname">Args</td><td>Types of arguments to use to invoke the function. </td></tr>
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<dl class="params"><dt>Parameters</dt><dd>
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<tr><td class="paramname">instance</td><td>An opaque instance of the underlying type. </td></tr>
<tr><td class="paramname">args</td><td>Parameters to use to invoke the function. </td></tr>
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<dl class="section return"><dt>Returns</dt><dd>A meta any containing the returned value, if any. </dd></dl>
<p class="definition">Definition at line <a class="el" href="meta_8hpp_source.html#l01085">1085</a> of file <a class="el" href="meta_8hpp_source.html">meta.hpp</a>.</p>
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<h2 class="memtitle"><span class="permalink"><a href="#a93c1f9ba3252788f9ac470f6ad6e3fb9">&#9670;&nbsp;</a></span>is_const()</h2>
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<p>Indicates whether a given meta function is constant or not. </p>
<dl class="section return"><dt>Returns</dt><dd>True if the meta function is constant, false otherwise. </dd></dl>
<p class="definition">Definition at line <a class="el" href="meta_8hpp_source.html#l01044">1044</a> of file <a class="el" href="meta_8hpp_source.html">meta.hpp</a>.</p>
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<h2 class="memtitle"><span class="permalink"><a href="#a8faf171039dc72ea51d94acc2c2ea249">&#9670;&nbsp;</a></span>is_static()</h2>
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<p>Indicates whether a given meta function is static or not. </p>
<dl class="section return"><dt>Returns</dt><dd>True if the meta function is static, false otherwise. </dd></dl>
<p class="definition">Definition at line <a class="el" href="meta_8hpp_source.html#l01052">1052</a> of file <a class="el" href="meta_8hpp_source.html">meta.hpp</a>.</p>
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<h2 class="memtitle"><span class="permalink"><a href="#a436c57daae914c9222de41c7b7678584">&#9670;&nbsp;</a></span>operator bool()</h2>
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<p>Returns true if a meta object is valid, false otherwise. </p>
<dl class="section return"><dt>Returns</dt><dd>True if the meta object is valid, false otherwise. </dd></dl>
<p class="definition">Definition at line <a class="el" href="meta_8hpp_source.html#l01116">1116</a> of file <a class="el" href="meta_8hpp_source.html">meta.hpp</a>.</p>
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<h2 class="memtitle"><span class="permalink"><a href="#a63056a4d3f0a16c988d90162240fe74d">&#9670;&nbsp;</a></span>parent()</h2>
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<p>Returns the meta type to which a meta object belongs. </p>
<dl class="section return"><dt>Returns</dt><dd>The meta type to which the meta object belongs. </dd></dl>
<p class="definition">Definition at line <a class="el" href="meta_8hpp_source.html#l01554">1554</a> of file <a class="el" href="meta_8hpp_source.html">meta.hpp</a>.</p>
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<h2 class="memtitle"><span class="permalink"><a href="#a78c007b0f307c817ae519004b14d3ea0">&#9670;&nbsp;</a></span>prop() <span class="overload">[1/2]</span></h2>
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<p>Returns the property associated with a given key. </p>
<dl class="params"><dt>Parameters</dt><dd>
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<tr><td class="paramname">key</td><td>The key to use to search for a property. </td></tr>
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<dl class="section return"><dt>Returns</dt><dd>The property associated with the given key, if any. </dd></dl>
<p class="definition">Definition at line <a class="el" href="meta_8hpp_source.html#l01106">1106</a> of file <a class="el" href="meta_8hpp_source.html">meta.hpp</a>.</p>
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template&lt;typename Op &gt; </div>
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<p>Iterates all the properties assigned to a meta function. </p>
<dl class="tparams"><dt>Template Parameters</dt><dd>
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<tr><td class="paramname">Op</td><td>Type of the function object to invoke. </td></tr>
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<dl class="params"><dt>Parameters</dt><dd>
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<tr><td class="paramname">op</td><td>A valid function object. </td></tr>
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<p class="definition">Definition at line <a class="el" href="meta_8hpp_source.html#l01097">1097</a> of file <a class="el" href="meta_8hpp_source.html">meta.hpp</a>.</p>
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<h2 class="memtitle"><span class="permalink"><a href="#a6a1bfe7f9b2e8c833dbfb5dff75bf1e9">&#9670;&nbsp;</a></span>ret()</h2>
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<p>Returns the meta type of the return type of a meta function. </p>
<dl class="section return"><dt>Returns</dt><dd>The meta type of the return type of the meta function. </dd></dl>
<p class="definition">Definition at line <a class="el" href="meta_8hpp_source.html#l01559">1559</a> of file <a class="el" href="meta_8hpp_source.html">meta.hpp</a>.</p>
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<h2 class="memtitle"><span class="permalink"><a href="#ae4bc5f5e90003362872d8cd056b2f689">&#9670;&nbsp;</a></span>size()</h2>
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<td class="memname"><a class="el" href="structentt_1_1meta__func.html#a422ec572c7c56d3cb46d09704be64f65">size_type</a> entt::meta_func::size </td>
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<p>Returns the number of arguments accepted by a meta function. </p>
<dl class="section return"><dt>Returns</dt><dd>The number of arguments accepted by the meta function. </dd></dl>
<p class="definition">Definition at line <a class="el" href="meta_8hpp_source.html#l01036">1036</a> of file <a class="el" href="meta_8hpp_source.html">meta.hpp</a>.</p>
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<hr/>The documentation for this struct was generated from the following file:<ul>
<li>src/entt/meta/<a class="el" href="meta_8hpp_source.html">meta.hpp</a></li>
</ul>
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