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entt/structentt_1_1meta__data.html
Michele Caini 1e23a11311 API reference v3.15.0
2025-03-19 15:49:42 +01:00

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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__data.html">meta_data</a></li> </ul>
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<a href="#pub-types">Public Types</a> &#124;
<a href="#pub-methods">Public Member Functions</a> &#124;
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<div class="headertitle"><div class="title">entt::meta_data Struct Reference</div></div>
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<p>Opaque wrapper for data members.
<a href="#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 id="pub-types" name="pub-types"></a>
Public Types</h2></td></tr>
<tr class="memitem:a312216483707bb667c8bf833eee0dff9" id="r_a312216483707bb667c8bf833eee0dff9"><td class="memItemLeft" align="right" valign="top">using&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="#a312216483707bb667c8bf833eee0dff9">size_type</a> = typename internal::meta_data_node::size_type</td></tr>
<tr class="memdesc:a312216483707bb667c8bf833eee0dff9"><td class="mdescLeft">&#160;</td><td class="mdescRight">Unsigned integer type. <br /></td></tr>
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Public Member Functions</h2></td></tr>
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&#160;</td><td class="memItemRight" valign="bottom"><b>meta_data</b> () noexcept=default</td></tr>
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<tr class="memitem:ac771dc050a78143f1672bfe32bf81ad6" id="r_ac771dc050a78143f1672bfe32bf81ad6"><td class="memItemLeft" align="right" valign="top">&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="#ac771dc050a78143f1672bfe32bf81ad6">meta_data</a> (const <a class="el" href="classentt_1_1meta__ctx.html">meta_ctx</a> &amp;area, internal::meta_data_node curr) noexcept</td></tr>
<tr class="memdesc:ac771dc050a78143f1672bfe32bf81ad6"><td class="mdescLeft">&#160;</td><td class="mdescRight">Context aware constructor for meta objects. <br /></td></tr>
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<tr class="memitem:a898b9be5e2a435fb3f9e4d5243275451" id="r_a898b9be5e2a435fb3f9e4d5243275451"><td class="memItemLeft" align="right" valign="top"><a class="el" href="#a312216483707bb667c8bf833eee0dff9">size_type</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="#a898b9be5e2a435fb3f9e4d5243275451">arity</a> () const noexcept</td></tr>
<tr class="memdesc:a898b9be5e2a435fb3f9e4d5243275451"><td class="mdescLeft">&#160;</td><td class="mdescRight">Returns the number of setters available. <br /></td></tr>
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<tr class="memdesc:a148f106584bfdd2bb33591d790c4a1c1"><td class="mdescLeft">&#160;</td><td class="mdescRight">Indicates whether a data member is constant or not. <br /></td></tr>
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<tr class="memitem:adeddff29e0b47f621f1bc77cb9d2be80" id="r_adeddff29e0b47f621f1bc77cb9d2be80"><td class="memItemLeft" align="right" valign="top">bool&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="#adeddff29e0b47f621f1bc77cb9d2be80">is_static</a> () const noexcept</td></tr>
<tr class="memdesc:adeddff29e0b47f621f1bc77cb9d2be80"><td class="mdescLeft">&#160;</td><td class="mdescRight">Indicates whether a data member is static or not. <br /></td></tr>
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<tr class="memitem:aa81980c2d202f511ec8afcb8b324afb4" id="r_aa81980c2d202f511ec8afcb8b324afb4"><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="#aa81980c2d202f511ec8afcb8b324afb4">type</a> () const noexcept</td></tr>
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<tr class="memitem:a9cec301b83378b11ad316663e8ece835" id="r_a9cec301b83378b11ad316663e8ece835"><td class="memTemplParams" colspan="2">template&lt;typename Type&gt; </td></tr>
<tr class="memitem:a9cec301b83378b11ad316663e8ece835"><td class="memTemplItemLeft" align="right" valign="top">bool&#160;</td><td class="memTemplItemRight" valign="bottom"><a class="el" href="#a9cec301b83378b11ad316663e8ece835">set</a> (<a class="el" href="structentt_1_1meta__handle.html">meta_handle</a> instance, Type &amp;&amp;value) const</td></tr>
<tr class="memdesc:a9cec301b83378b11ad316663e8ece835"><td class="mdescLeft">&#160;</td><td class="mdescRight">Sets the value of a given variable. <br /></td></tr>
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<tr class="memitem:a754da41b4c8057f7c9a3ff4738935d04" id="r_a754da41b4c8057f7c9a3ff4738935d04"><td class="memItemLeft" align="right" valign="top"><a class="el" href="classentt_1_1meta__any.html">meta_any</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="#a754da41b4c8057f7c9a3ff4738935d04">get</a> (<a class="el" href="structentt_1_1meta__handle.html">meta_handle</a> instance) const</td></tr>
<tr class="memdesc:a754da41b4c8057f7c9a3ff4738935d04"><td class="mdescLeft">&#160;</td><td class="mdescRight">Gets the value of a given variable. <br /></td></tr>
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<tr class="memitem:a17b5f0106970b5cbd61bce69627a28c1" id="r_a17b5f0106970b5cbd61bce69627a28c1"><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="#a17b5f0106970b5cbd61bce69627a28c1">arg</a> (<a class="el" href="#a312216483707bb667c8bf833eee0dff9">size_type</a> index) const noexcept</td></tr>
<tr class="memdesc:a17b5f0106970b5cbd61bce69627a28c1"><td class="mdescLeft">&#160;</td><td class="mdescRight">Returns the type accepted by the i-th setter. <br /></td></tr>
<tr class="separator:a17b5f0106970b5cbd61bce69627a28c1"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:af438ace0d6f9a93f8c07657d3b621cdd" id="r_af438ace0d6f9a93f8c07657d3b621cdd"><td class="memTemplParams" colspan="2">template&lt;typename Type&gt; </td></tr>
<tr class="memitem:af438ace0d6f9a93f8c07657d3b621cdd"><td class="memTemplItemLeft" align="right" valign="top">Type&#160;</td><td class="memTemplItemRight" valign="bottom"><a class="el" href="#af438ace0d6f9a93f8c07657d3b621cdd">traits</a> () const noexcept</td></tr>
<tr class="memdesc:af438ace0d6f9a93f8c07657d3b621cdd"><td class="mdescLeft">&#160;</td><td class="mdescRight">Returns all meta traits for a given meta object. <br /></td></tr>
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<tr class="memitem:aa7116efed3b5ed7c707d21e6cf55bbfd" id="r_aa7116efed3b5ed7c707d21e6cf55bbfd"><td class="memItemLeft" align="right" valign="top"><a class="el" href="structentt_1_1meta__custom.html">meta_custom</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="#aa7116efed3b5ed7c707d21e6cf55bbfd">custom</a> () const noexcept</td></tr>
<tr class="memdesc:aa7116efed3b5ed7c707d21e6cf55bbfd"><td class="mdescLeft">&#160;</td><td class="mdescRight">Returns user defined data for a given meta object. <br /></td></tr>
<tr class="separator:aa7116efed3b5ed7c707d21e6cf55bbfd"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a1127923d5d2f1c59af5e739c95f4798a" id="r_a1127923d5d2f1c59af5e739c95f4798a"><td class="memItemLeft" align="right" valign="top">&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="#a1127923d5d2f1c59af5e739c95f4798a">operator bool</a> () const noexcept</td></tr>
<tr class="memdesc:a1127923d5d2f1c59af5e739c95f4798a"><td class="mdescLeft">&#160;</td><td class="mdescRight">Returns true if an object is valid, false otherwise. <br /></td></tr>
<tr class="separator:a1127923d5d2f1c59af5e739c95f4798a"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a9316b0562ce25724c72a271344d856ca" id="r_a9316b0562ce25724c72a271344d856ca"><td class="memItemLeft" align="right" valign="top">bool&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="#a9316b0562ce25724c72a271344d856ca">operator==</a> (const <a class="el" href="structentt_1_1meta__data.html">meta_data</a> &amp;other) const noexcept</td></tr>
<tr class="memdesc:a9316b0562ce25724c72a271344d856ca"><td class="mdescLeft">&#160;</td><td class="mdescRight">Checks if two objects refer to the same type. <br /></td></tr>
<tr class="separator:a9316b0562ce25724c72a271344d856ca"><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 wrapper for data members. </p>
<p class="definition">Definition at line <a class="el" href="meta_8hpp_source.html#l00840">840</a> of file <a class="el" href="meta_8hpp_source.html">meta.hpp</a>.</p>
</div><h2 class="groupheader">Member Typedef Documentation</h2>
<a id="a312216483707bb667c8bf833eee0dff9" name="a312216483707bb667c8bf833eee0dff9"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a312216483707bb667c8bf833eee0dff9">&#9670;&#160;</a></span>size_type</h2>
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<td class="memname">using <a class="el" href="#a312216483707bb667c8bf833eee0dff9">entt::meta_data::size_type</a> = typename internal::meta_data_node::size_type</td>
</tr>
</table>
</div><div class="memdoc">
<p>Unsigned integer type. </p>
<p class="definition">Definition at line <a class="el" href="meta_8hpp_source.html#l00842">842</a> of file <a class="el" href="meta_8hpp_source.html">meta.hpp</a>.</p>
</div>
</div>
<h2 class="groupheader">Constructor &amp; Destructor Documentation</h2>
<a id="ac771dc050a78143f1672bfe32bf81ad6" name="ac771dc050a78143f1672bfe32bf81ad6"></a>
<h2 class="memtitle"><span class="permalink"><a href="#ac771dc050a78143f1672bfe32bf81ad6">&#9670;&#160;</a></span>meta_data()</h2>
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<td class="memname">entt::meta_data::meta_data </td>
<td>(</td>
<td class="paramtype">const <a class="el" href="classentt_1_1meta__ctx.html">meta_ctx</a> &amp;</td> <td class="paramname"><span class="paramname"><em>area</em></span>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">internal::meta_data_node</td> <td class="paramname"><span class="paramname"><em>curr</em></span>&#160;)</td>
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<span class="mlabels"><span class="mlabel inline">inline</span><span class="mlabel noexcept">noexcept</span></span> </td>
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<p>Context aware constructor for meta objects. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">area</td><td>The context from which to search for meta types. </td></tr>
<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#l00852">852</a> of file <a class="el" href="meta_8hpp_source.html">meta.hpp</a>.</p>
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</div>
<h2 class="groupheader">Member Function Documentation</h2>
<a id="a17b5f0106970b5cbd61bce69627a28c1" name="a17b5f0106970b5cbd61bce69627a28c1"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a17b5f0106970b5cbd61bce69627a28c1">&#9670;&#160;</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_data::arg </td>
<td>(</td>
<td class="paramtype"><a class="el" href="#a312216483707bb667c8bf833eee0dff9">size_type</a></td> <td class="paramname"><span class="paramname"><em>index</em></span></td><td>)</td>
<td> const</td>
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<span class="mlabels"><span class="mlabel inline">inline</span><span class="mlabel nodiscard">nodiscard</span><span class="mlabel noexcept">noexcept</span></span> </td>
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<p>Returns the type accepted by the i-th setter. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">index</td><td>Index of the setter of which to return the accepted type. </td></tr>
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</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>The type accepted by the i-th setter. </dd></dl>
<p class="definition">Definition at line <a class="el" href="meta_8hpp_source.html#l01603">1603</a> of file <a class="el" href="meta_8hpp_source.html">meta.hpp</a>.</p>
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<a id="a898b9be5e2a435fb3f9e4d5243275451" name="a898b9be5e2a435fb3f9e4d5243275451"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a898b9be5e2a435fb3f9e4d5243275451">&#9670;&#160;</a></span>arity()</h2>
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<td class="memname"><a class="el" href="#a312216483707bb667c8bf833eee0dff9">size_type</a> entt::meta_data::arity </td>
<td>(</td>
<td class="paramname"><span class="paramname"><em></em></span></td><td>)</td>
<td> const</td>
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</td>
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<span class="mlabels"><span class="mlabel inline">inline</span><span class="mlabel nodiscard">nodiscard</span><span class="mlabel noexcept">noexcept</span></span> </td>
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<p>Returns the number of setters available. </p>
<dl class="section return"><dt>Returns</dt><dd>The number of setters available. </dd></dl>
<p class="definition">Definition at line <a class="el" href="meta_8hpp_source.html#l00860">860</a> of file <a class="el" href="meta_8hpp_source.html">meta.hpp</a>.</p>
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<a id="aa7116efed3b5ed7c707d21e6cf55bbfd" name="aa7116efed3b5ed7c707d21e6cf55bbfd"></a>
<h2 class="memtitle"><span class="permalink"><a href="#aa7116efed3b5ed7c707d21e6cf55bbfd">&#9670;&#160;</a></span>custom()</h2>
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<td class="memname"><a class="el" href="structentt_1_1meta__custom.html">meta_custom</a> entt::meta_data::custom </td>
<td>(</td>
<td class="paramname"><span class="paramname"><em></em></span></td><td>)</td>
<td> const</td>
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<span class="mlabels"><span class="mlabel inline">inline</span><span class="mlabel nodiscard">nodiscard</span><span class="mlabel noexcept">noexcept</span></span> </td>
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<p>Returns user defined data for a given meta object. </p>
<dl class="section return"><dt>Returns</dt><dd>User defined arbitrary data. </dd></dl>
<p class="definition">Definition at line <a class="el" href="meta_8hpp_source.html#l00926">926</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="#a754da41b4c8057f7c9a3ff4738935d04">&#9670;&#160;</a></span>get()</h2>
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<td class="memname"><a class="el" href="classentt_1_1meta__any.html">meta_any</a> entt::meta_data::get </td>
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<p>Gets the value of a given variable. </p>
<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>
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<dl class="section return"><dt>Returns</dt><dd>A wrapper containing the value of the underlying variable. </dd></dl>
<p class="definition">Definition at line <a class="el" href="meta_8hpp_source.html#l00901">901</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="#a148f106584bfdd2bb33591d790c4a1c1">&#9670;&#160;</a></span>is_const()</h2>
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<td class="memname">bool entt::meta_data::is_const </td>
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<p>Indicates whether a data member is constant or not. </p>
<dl class="section return"><dt>Returns</dt><dd>True if the data member is constant, false otherwise. </dd></dl>
<p class="definition">Definition at line <a class="el" href="meta_8hpp_source.html#l00868">868</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="#adeddff29e0b47f621f1bc77cb9d2be80">&#9670;&#160;</a></span>is_static()</h2>
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<td class="memname">bool entt::meta_data::is_static </td>
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<p>Indicates whether a data member is static or not. </p>
<dl class="section return"><dt>Returns</dt><dd>True if the data member is static, false otherwise. </dd></dl>
<p class="definition">Definition at line <a class="el" href="meta_8hpp_source.html#l00876">876</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="#a1127923d5d2f1c59af5e739c95f4798a">&#9670;&#160;</a></span>operator bool()</h2>
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<p>Returns true if an object is valid, false otherwise. </p>
<dl class="section return"><dt>Returns</dt><dd>True if the object is valid, false otherwise. </dd></dl>
<p class="definition">Definition at line <a class="el" href="meta_8hpp_source.html#l00934">934</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="#a9316b0562ce25724c72a271344d856ca">&#9670;&#160;</a></span>operator==()</h2>
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<td class="memname">bool entt::meta_data::operator== </td>
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<p>Checks if two objects refer to the same type. </p>
<dl class="params"><dt>Parameters</dt><dd>
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<tr><td class="paramname">other</td><td>The object with which to compare. </td></tr>
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<dl class="section return"><dt>Returns</dt><dd>True if the objects refer to the same type, false otherwise. </dd></dl>
<p class="definition">Definition at line <a class="el" href="meta_8hpp_source.html#l00943">943</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="#a9cec301b83378b11ad316663e8ece835">&#9670;&#160;</a></span>set()</h2>
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<td class="memname">bool entt::meta_data::set </td>
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<p>Sets the value of a given variable. </p>
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<tr><td class="paramname">Type</td><td>Type of value to assign. </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">value</td><td>Parameter to use to set the underlying variable. </td></tr>
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<dl class="section return"><dt>Returns</dt><dd>True in case of success, false otherwise. </dd></dl>
<p class="definition">Definition at line <a class="el" href="meta_8hpp_source.html#l00892">892</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="#af438ace0d6f9a93f8c07657d3b621cdd">&#9670;&#160;</a></span>traits()</h2>
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<td class="memname">Type entt::meta_data::traits </td>
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<p>Returns all meta traits for a given meta object. </p>
<dl class="tparams"><dt>Template Parameters</dt><dd>
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<tr><td class="paramname">Type</td><td>The type to convert the meta traits to. </td></tr>
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<dl class="section return"><dt>Returns</dt><dd>The registered meta traits, if any. </dd></dl>
<p class="definition">Definition at line <a class="el" href="meta_8hpp_source.html#l00918">918</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="#aa81980c2d202f511ec8afcb8b324afb4">&#9670;&#160;</a></span>type()</h2>
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<td class="memname"><a class="el" href="classentt_1_1meta__type.html">meta_type</a> entt::meta_data::type </td>
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<p>Returns the object type if any, <code>type_id&lt;void&gt;()</code> otherwise. </p>
<dl class="section return"><dt>Returns</dt><dd>The object type if any, <code>type_id&lt;void&gt;()</code> otherwise. </dd></dl>
<p class="definition">Definition at line <a class="el" href="meta_8hpp_source.html#l01599">1599</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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