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<div class="fragment"><div class="line"><a id="l00001" name="l00001"></a><span class="lineno"> 1</span><span class="preprocessor">#ifndef ENTT_CORE_TUPLE_HPP</span></div>
<div class="line"><a id="l00002" name="l00002"></a><span class="lineno"> 2</span><span class="preprocessor">#define ENTT_CORE_TUPLE_HPP</span></div>
<div class="line"><a id="l00003" name="l00003"></a><span class="lineno"> 3</span> </div>
<div class="line"><a id="l00004" name="l00004"></a><span class="lineno"> 4</span><span class="preprocessor">#include &lt;tuple&gt;</span></div>
<div class="line"><a id="l00005" name="l00005"></a><span class="lineno"> 5</span><span class="preprocessor">#include &lt;type_traits&gt;</span></div>
<div class="line"><a id="l00006" name="l00006"></a><span class="lineno"> 6</span><span class="preprocessor">#include &lt;utility&gt;</span></div>
<div class="line"><a id="l00007" name="l00007"></a><span class="lineno"> 7</span> </div>
<div class="line"><a id="l00008" name="l00008"></a><span class="lineno"> 8</span><span class="keyword">namespace </span><a class="code hl_namespace" href="namespaceentt.html">entt</a> {</div>
<div class="line"><a id="l00009" name="l00009"></a><span class="lineno"> 9</span></div>
<div class="line"><a id="l00015" name="l00015"></a><span class="lineno"> 15</span><span class="keyword">template</span>&lt;<span class="keyword">typename</span> Type&gt;</div>
<div class="line"><a id="l00016" name="l00016"></a><span class="lineno"><a class="line" href="structentt_1_1is__tuple.html"> 16</a></span><span class="keyword">struct </span><a class="code hl_struct" href="structentt_1_1is__tuple.html">is_tuple</a>: std::false_type {};</div>
<div class="line"><a id="l00017" name="l00017"></a><span class="lineno"> 17</span></div>
<div class="line"><a id="l00022" name="l00022"></a><span class="lineno"> 22</span><span class="keyword">template</span>&lt;<span class="keyword">typename</span>... Args&gt;</div>
<div class="line"><a id="l00023" name="l00023"></a><span class="lineno"><a class="line" href="structentt_1_1is__tuple_3_01std_1_1tuple_3_01Args_8_8_8_01_4_01_4.html"> 23</a></span><span class="keyword">struct </span><a class="code hl_struct" href="structentt_1_1is__tuple.html">is_tuple</a>&lt;std::tuple&lt;Args...&gt;&gt;: std::true_type {};</div>
<div class="line"><a id="l00024" name="l00024"></a><span class="lineno"> 24</span></div>
<div class="line"><a id="l00029" name="l00029"></a><span class="lineno"> 29</span><span class="keyword">template</span>&lt;<span class="keyword">typename</span> Type&gt;</div>
<div class="line"><a id="l00030" name="l00030"></a><span class="lineno"><a class="line" href="namespaceentt.html#a0617c69b8aa01b123162d23d7213c6aa"> 30</a></span><span class="keyword">inline</span> <span class="keyword">constexpr</span> <span class="keywordtype">bool</span> <a class="code hl_variable" href="namespaceentt.html#a0617c69b8aa01b123162d23d7213c6aa">is_tuple_v</a> = <a class="code hl_struct" href="structentt_1_1is__tuple.html">is_tuple&lt;Type&gt;::value</a>;</div>
<div class="line"><a id="l00031" name="l00031"></a><span class="lineno"> 31</span></div>
<div class="line"><a id="l00039" name="l00039"></a><span class="lineno"> 39</span><span class="keyword">template</span>&lt;<span class="keyword">typename</span> Type&gt;</div>
<div class="foldopen" id="foldopen00040" data-start="{" data-end="}">
<div class="line"><a id="l00040" name="l00040"></a><span class="lineno"><a class="line" href="namespaceentt.html#abf2665e41871f7493f674c8dbba0a593"> 40</a></span><span class="keyword">constexpr</span> <span class="keyword">decltype</span>(<span class="keyword">auto</span>) <a class="code hl_function" href="namespaceentt.html#abf2665e41871f7493f674c8dbba0a593">unwrap_tuple</a>(Type &amp;&amp;value) <span class="keyword">noexcept</span> {</div>
<div class="line"><a id="l00041" name="l00041"></a><span class="lineno"> 41</span> <span class="keywordflow">if</span> <span class="keyword">constexpr</span>(std::tuple_size_v&lt;std::remove_reference_t&lt;Type&gt;&gt; == 1u) {</div>
<div class="line"><a id="l00042" name="l00042"></a><span class="lineno"> 42</span> <span class="keywordflow">return</span> std::get&lt;0&gt;(std::forward&lt;Type&gt;(value));</div>
<div class="line"><a id="l00043" name="l00043"></a><span class="lineno"> 43</span> } <span class="keywordflow">else</span> {</div>
<div class="line"><a id="l00044" name="l00044"></a><span class="lineno"> 44</span> <span class="keywordflow">return</span> std::forward&lt;Type&gt;(value);</div>
<div class="line"><a id="l00045" name="l00045"></a><span class="lineno"> 45</span> }</div>
<div class="line"><a id="l00046" name="l00046"></a><span class="lineno"> 46</span>}</div>
</div>
<div class="line"><a id="l00047" name="l00047"></a><span class="lineno"> 47</span></div>
<div class="line"><a id="l00052" name="l00052"></a><span class="lineno"> 52</span><span class="keyword">template</span>&lt;<span class="keyword">typename</span> Func&gt;</div>
<div class="foldopen" id="foldopen00053" data-start="{" data-end="};">
<div class="line"><a id="l00053" name="l00053"></a><span class="lineno"><a class="line" href="structentt_1_1forward__apply.html"> 53</a></span><span class="keyword">struct </span><a class="code hl_function" href="structentt_1_1forward__apply.html#a15ad53ead573c72820db3f8ff8f60fb5">forward_apply</a>: <span class="keyword">private</span> Func {</div>
<div class="line"><a id="l00059" name="l00059"></a><span class="lineno"> 59</span> <span class="keyword">template</span>&lt;<span class="keyword">typename</span>... Args&gt;</div>
<div class="foldopen" id="foldopen00060" data-start="{" data-end="}">
<div class="line"><a id="l00060" name="l00060"></a><span class="lineno"><a class="line" href="structentt_1_1forward__apply.html#a15ad53ead573c72820db3f8ff8f60fb5"> 60</a></span> <span class="keyword">constexpr</span> <a class="code hl_function" href="structentt_1_1forward__apply.html#a15ad53ead573c72820db3f8ff8f60fb5">forward_apply</a>(Args &amp;&amp;...args) <span class="keyword">noexcept</span>(std::is_nothrow_constructible_v&lt;Func, Args...&gt;)</div>
<div class="line"><a id="l00061" name="l00061"></a><span class="lineno"> 61</span> : Func{std::forward&lt;Args&gt;(args)...} {}</div>
</div>
<div class="line"><a id="l00062" name="l00062"></a><span class="lineno"> 62</span></div>
<div class="line"><a id="l00069" name="l00069"></a><span class="lineno"> 69</span> <span class="keyword">template</span>&lt;<span class="keyword">typename</span> Type&gt;</div>
<div class="foldopen" id="foldopen00070" data-start="{" data-end="}">
<div class="line"><a id="l00070" name="l00070"></a><span class="lineno"><a class="line" href="structentt_1_1forward__apply.html#a151fa7f389efe40a8b4c09c1bd055ec2"> 70</a></span> <span class="keyword">constexpr</span> <span class="keyword">decltype</span>(<span class="keyword">auto</span>) <a class="code hl_function" href="structentt_1_1forward__apply.html#a151fa7f389efe40a8b4c09c1bd055ec2">operator()</a>(Type &amp;&amp;args) <span class="keyword">noexcept</span>(<span class="keyword">noexcept</span>(std::apply(std::declval&lt;Func &amp;&gt;(), args))) {</div>
<div class="line"><a id="l00071" name="l00071"></a><span class="lineno"> 71</span> <span class="keywordflow">return</span> std::apply(<span class="keyword">static_cast&lt;</span>Func &amp;<span class="keyword">&gt;</span>(*<span class="keyword">this</span>), std::forward&lt;Type&gt;(args));</div>
<div class="line"><a id="l00072" name="l00072"></a><span class="lineno"> 72</span> }</div>
</div>
<div class="line"><a id="l00073" name="l00073"></a><span class="lineno"> 73</span></div>
<div class="line"><a id="l00075" name="l00075"></a><span class="lineno"> 75</span> <span class="keyword">template</span>&lt;<span class="keyword">typename</span> Type&gt;</div>
<div class="foldopen" id="foldopen00076" data-start="{" data-end="}">
<div class="line"><a id="l00076" name="l00076"></a><span class="lineno"><a class="line" href="structentt_1_1forward__apply.html#afc1bb10152536953a716529e1772a418"> 76</a></span> <span class="keyword">constexpr</span> <span class="keyword">decltype</span>(<span class="keyword">auto</span>) <span class="keyword">operator</span>()(Type &amp;&amp;args) <span class="keyword">const</span> <span class="keyword">noexcept</span>(<span class="keyword">noexcept</span>(std::apply(std::declval&lt;const Func &amp;&gt;(), args))) {</div>
<div class="line"><a id="l00077" name="l00077"></a><span class="lineno"> 77</span> <span class="keywordflow">return</span> std::apply(<span class="keyword">static_cast&lt;</span><span class="keyword">const </span>Func &amp;<span class="keyword">&gt;</span>(*<span class="keyword">this</span>), std::forward&lt;Type&gt;(args));</div>
<div class="line"><a id="l00078" name="l00078"></a><span class="lineno"> 78</span> }</div>
</div>
<div class="line"><a id="l00079" name="l00079"></a><span class="lineno"> 79</span>};</div>
</div>
<div class="line"><a id="l00080" name="l00080"></a><span class="lineno"> 80</span></div>
<div class="line"><a id="l00085" name="l00085"></a><span class="lineno"> 85</span><span class="keyword">template</span>&lt;<span class="keyword">typename</span> Func&gt;</div>
<div class="line"><a id="l00086" name="l00086"></a><span class="lineno"><a class="line" href="namespaceentt.html#a0662ddd2021dbf1513b7d0b40c50b9b2"> 86</a></span><a class="code hl_function" href="namespaceentt.html#a0662ddd2021dbf1513b7d0b40c50b9b2">forward_apply</a>(Func) -&gt; <a class="code hl_struct" href="structentt_1_1forward__apply.html">forward_apply&lt;std::remove_reference_t&lt;std::remove_cv_t&lt;Func&gt;</a>&gt;&gt;;</div>
<div class="line"><a id="l00087" name="l00087"></a><span class="lineno"> 87</span> </div>
<div class="line"><a id="l00088" name="l00088"></a><span class="lineno"> 88</span>} <span class="comment">// namespace entt</span></div>
<div class="line"><a id="l00089" name="l00089"></a><span class="lineno"> 89</span> </div>
<div class="line"><a id="l00090" name="l00090"></a><span class="lineno"> 90</span><span class="preprocessor">#endif</span></div>
<div class="ttc" id="anamespaceentt_html"><div class="ttname"><a href="namespaceentt.html">entt</a></div><div class="ttdoc">EnTT default namespace.</div><div class="ttdef"><b>Definition</b> <a href="dense__map_8hpp_source.html#l00022">dense_map.hpp:22</a></div></div>
<div class="ttc" id="anamespaceentt_html_a0617c69b8aa01b123162d23d7213c6aa"><div class="ttname"><a href="namespaceentt.html#a0617c69b8aa01b123162d23d7213c6aa">entt::is_tuple_v</a></div><div class="ttdeci">constexpr bool is_tuple_v</div><div class="ttdoc">Helper variable template.</div><div class="ttdef"><b>Definition</b> <a href="#l00030">tuple.hpp:30</a></div></div>
<div class="ttc" id="anamespaceentt_html_a0662ddd2021dbf1513b7d0b40c50b9b2"><div class="ttname"><a href="namespaceentt.html#a0662ddd2021dbf1513b7d0b40c50b9b2">entt::forward_apply</a></div><div class="ttdeci">forward_apply(Func) -&gt; forward_apply&lt; std::remove_reference_t&lt; std::remove_cv_t&lt; Func &gt; &gt; &gt;</div><div class="ttdoc">Deduction guide.</div></div>
<div class="ttc" id="anamespaceentt_html_abf2665e41871f7493f674c8dbba0a593"><div class="ttname"><a href="namespaceentt.html#abf2665e41871f7493f674c8dbba0a593">entt::unwrap_tuple</a></div><div class="ttdeci">constexpr decltype(auto) unwrap_tuple(Type &amp;&amp;value) noexcept</div><div class="ttdoc">Utility function to unwrap tuples of a single element.</div><div class="ttdef"><b>Definition</b> <a href="#l00040">tuple.hpp:40</a></div></div>
<div class="ttc" id="astructentt_1_1forward__apply_html"><div class="ttname"><a href="structentt_1_1forward__apply.html">entt::forward_apply</a></div><div class="ttdoc">Utility class to forward-and-apply tuple objects.</div><div class="ttdef"><b>Definition</b> <a href="#l00053">tuple.hpp:53</a></div></div>
<div class="ttc" id="astructentt_1_1forward__apply_html_a151fa7f389efe40a8b4c09c1bd055ec2"><div class="ttname"><a href="structentt_1_1forward__apply.html#a151fa7f389efe40a8b4c09c1bd055ec2">entt::forward_apply::operator()</a></div><div class="ttdeci">constexpr decltype(auto) operator()(Type &amp;&amp;args) noexcept(noexcept(std::apply(std::declval&lt; Func &amp; &gt;(), args)))</div><div class="ttdoc">Forwards and applies the arguments with the underlying function.</div><div class="ttdef"><b>Definition</b> <a href="#l00070">tuple.hpp:70</a></div></div>
<div class="ttc" id="astructentt_1_1forward__apply_html_a15ad53ead573c72820db3f8ff8f60fb5"><div class="ttname"><a href="structentt_1_1forward__apply.html#a15ad53ead573c72820db3f8ff8f60fb5">entt::forward_apply::forward_apply</a></div><div class="ttdeci">constexpr forward_apply(Args &amp;&amp;...args) noexcept(std::is_nothrow_constructible_v&lt; Func, Args... &gt;)</div><div class="ttdoc">Constructs a forward-and-apply object.</div><div class="ttdef"><b>Definition</b> <a href="#l00060">tuple.hpp:60</a></div></div>
<div class="ttc" id="astructentt_1_1is__tuple_html"><div class="ttname"><a href="structentt_1_1is__tuple.html">entt::is_tuple</a></div><div class="ttdoc">Provides the member constant value to true if a given type is a tuple, false otherwise.</div><div class="ttdef"><b>Definition</b> <a href="#l00016">tuple.hpp:16</a></div></div>
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