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<li class="navelem"><a class="el" href="dir_68267d1309a1af8e8297ef4c3efbcdba.html">src</a></li><li class="navelem"><a class="el" href="dir_66e9674e8206a335795995fa32a03c91.html">entt</a></li><li class="navelem"><a class="el" href="dir_de8f4e6ba3f54a2a21309f742e93a373.html">core</a></li> </ul>
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<div class="headertitle"><div class="title">tuple.hpp</div></div>
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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>
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<div class="line"><a id="l00002" name="l00002"></a><span class="lineno"> 2</span><span class="preprocessor">#define ENTT_CORE_TUPLE_HPP</span></div>
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<div class="line"><a id="l00003" name="l00003"></a><span class="lineno"> 3</span> </div>
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<div class="line"><a id="l00004" name="l00004"></a><span class="lineno"> 4</span><span class="preprocessor">#include <tuple></span></div>
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<div class="line"><a id="l00005" name="l00005"></a><span class="lineno"> 5</span><span class="preprocessor">#include <type_traits></span></div>
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<div class="line"><a id="l00006" name="l00006"></a><span class="lineno"> 6</span><span class="preprocessor">#include <utility></span></div>
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<div class="line"><a id="l00007" name="l00007"></a><span class="lineno"> 7</span> </div>
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<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>
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<div class="line"><a id="l00009" name="l00009"></a><span class="lineno"> 9</span> </div>
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<div class="line"><a id="l00011" name="l00011"></a><span class="lineno"> 11</span><span class="keyword">namespace </span>internal {</div>
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<div class="line"><a id="l00012" name="l00012"></a><span class="lineno"> 12</span> </div>
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<div class="line"><a id="l00013" name="l00013"></a><span class="lineno"> 13</span><span class="keyword">template</span><<span class="keyword">typename</span>></div>
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<div class="line"><a id="l00014" name="l00014"></a><span class="lineno"> 14</span><span class="keyword">struct </span>is_tuple_impl: std::false_type {};</div>
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<div class="line"><a id="l00015" name="l00015"></a><span class="lineno"> 15</span> </div>
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<div class="line"><a id="l00016" name="l00016"></a><span class="lineno"> 16</span><span class="keyword">template</span><<span class="keyword">typename</span>... Args></div>
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<div class="line"><a id="l00017" name="l00017"></a><span class="lineno"> 17</span><span class="keyword">struct </span>is_tuple_impl<std::tuple<Args...>>: std::true_type {};</div>
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<div class="line"><a id="l00018" name="l00018"></a><span class="lineno"> 18</span> </div>
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<div class="line"><a id="l00019" name="l00019"></a><span class="lineno"> 19</span>} <span class="comment">// namespace internal</span></div>
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<div class="line"><a id="l00027" name="l00027"></a><span class="lineno"> 27</span><span class="keyword">template</span><<span class="keyword">typename</span> Type></div>
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<div class="line"><a id="l00028" name="l00028"></a><span class="lineno"><a class="line" href="structentt_1_1is__tuple.html"> 28</a></span><span class="keyword">struct </span><a class="code hl_struct" href="structentt_1_1is__tuple.html">is_tuple</a>: internal::is_tuple_impl<std::remove_cv_t<Type>> {};</div>
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<div class="line"><a id="l00029" name="l00029"></a><span class="lineno"> 29</span> </div>
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<div class="line"><a id="l00034" name="l00034"></a><span class="lineno"> 34</span><span class="keyword">template</span><<span class="keyword">typename</span> Type></div>
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<div class="line"><a id="l00035" name="l00035"></a><span class="lineno"><a class="line" href="namespaceentt.html#a0617c69b8aa01b123162d23d7213c6aa"> 35</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<Type>::value</a>;</div>
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<div class="line"><a id="l00036" name="l00036"></a><span class="lineno"> 36</span> </div>
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<div class="line"><a id="l00044" name="l00044"></a><span class="lineno"> 44</span><span class="keyword">template</span><<span class="keyword">typename</span> Type></div>
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<div class="foldopen" id="foldopen00045" data-start="{" data-end="}">
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<div class="line"><a id="l00045" name="l00045"></a><span class="lineno"><a class="line" href="namespaceentt.html#abf2665e41871f7493f674c8dbba0a593"> 45</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 &&value) <span class="keyword">noexcept</span> {</div>
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<div class="line"><a id="l00046" name="l00046"></a><span class="lineno"> 46</span> <span class="keywordflow">if</span> <span class="keyword">constexpr</span>(std::tuple_size_v<std::remove_reference_t<Type>> == 1u) {</div>
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<div class="line"><a id="l00047" name="l00047"></a><span class="lineno"> 47</span> <span class="keywordflow">return</span> std::get<0>(std::forward<Type>(value));</div>
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<div class="line"><a id="l00048" name="l00048"></a><span class="lineno"> 48</span> } <span class="keywordflow">else</span> {</div>
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<div class="line"><a id="l00049" name="l00049"></a><span class="lineno"> 49</span> <span class="keywordflow">return</span> std::forward<Type>(value);</div>
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<div class="line"><a id="l00050" name="l00050"></a><span class="lineno"> 50</span> }</div>
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<div class="line"><a id="l00051" name="l00051"></a><span class="lineno"> 51</span>}</div>
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</div>
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<div class="line"><a id="l00052" name="l00052"></a><span class="lineno"> 52</span> </div>
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<div class="line"><a id="l00057" name="l00057"></a><span class="lineno"> 57</span><span class="keyword">template</span><<span class="keyword">typename</span> Func></div>
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<div class="foldopen" id="foldopen00058" data-start="{" data-end="};">
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<div class="line"><a id="l00058" name="l00058"></a><span class="lineno"><a class="line" href="structentt_1_1forward__apply.html"> 58</a></span><span class="keyword">struct </span><a class="code hl_struct" href="structentt_1_1forward__apply.html">forward_apply</a>: <span class="keyword">private</span> Func {</div>
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<div class="line"><a id="l00064" name="l00064"></a><span class="lineno"> 64</span> <span class="keyword">template</span><<span class="keyword">typename</span>... <a class="code hl_function" href="namespaceentt.html#a12e4d0c58f9c4cc6f5513c39c530b9b7">Args</a>></div>
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<div class="foldopen" id="foldopen00065" data-start="{" data-end="}">
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<div class="line"><a id="l00065" name="l00065"></a><span class="lineno"><a class="line" href="structentt_1_1forward__apply.html#a15ad53ead573c72820db3f8ff8f60fb5"> 65</a></span> <span class="keyword">constexpr</span> <a class="code hl_function" href="structentt_1_1forward__apply.html#a15ad53ead573c72820db3f8ff8f60fb5">forward_apply</a>(<a class="code hl_function" href="namespaceentt.html#a12e4d0c58f9c4cc6f5513c39c530b9b7">Args</a> &&...<a class="code hl_function" href="namespaceentt.html#a12e4d0c58f9c4cc6f5513c39c530b9b7">args</a>) <span class="keyword">noexcept</span>(std::is_nothrow_constructible_v<Func, <a class="code hl_function" href="namespaceentt.html#a12e4d0c58f9c4cc6f5513c39c530b9b7">Args</a>...>)</div>
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<div class="line"><a id="l00066" name="l00066"></a><span class="lineno"> 66</span> : Func{std::<a class="code hl_function" href="namespaceentt.html#a12e4d0c58f9c4cc6f5513c39c530b9b7">forward</a><<a class="code hl_function" href="namespaceentt.html#a12e4d0c58f9c4cc6f5513c39c530b9b7">Args</a>>(<a class="code hl_function" href="namespaceentt.html#a12e4d0c58f9c4cc6f5513c39c530b9b7">args</a>)...} {}</div>
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</div>
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<div class="line"><a id="l00067" name="l00067"></a><span class="lineno"> 67</span> </div>
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<div class="line"><a id="l00074" name="l00074"></a><span class="lineno"> 74</span> <span class="keyword">template</span><<span class="keyword">typename</span> Type></div>
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<div class="foldopen" id="foldopen00075" data-start="{" data-end="}">
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<div class="line"><a id="l00075" name="l00075"></a><span class="lineno"><a class="line" href="structentt_1_1forward__apply.html#a151fa7f389efe40a8b4c09c1bd055ec2"> 75</a></span> <span class="keyword">constexpr</span> <span class="keyword">decltype</span>(<span class="keyword">auto</span>) <span class="keyword">operator</span>()(Type &&<a class="code hl_function" href="namespaceentt.html#a12e4d0c58f9c4cc6f5513c39c530b9b7">args</a>) <span class="keyword">noexcept</span>(<span class="keyword">noexcept</span>(std::apply(std::declval<Func &>(), <a class="code hl_function" href="namespaceentt.html#a12e4d0c58f9c4cc6f5513c39c530b9b7">args</a>))) {</div>
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<div class="line"><a id="l00076" name="l00076"></a><span class="lineno"> 76</span> <span class="keywordflow">return</span> std::apply(<span class="keyword">static_cast<</span>Func &<span class="keyword">></span>(*<span class="keyword">this</span>), std::forward<Type>(<a class="code hl_function" href="namespaceentt.html#a12e4d0c58f9c4cc6f5513c39c530b9b7">args</a>));</div>
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<div class="line"><a id="l00077" name="l00077"></a><span class="lineno"> 77</span> }</div>
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</div>
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<div class="line"><a id="l00078" name="l00078"></a><span class="lineno"> 78</span> </div>
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<div class="line"><a id="l00080" name="l00080"></a><span class="lineno"> 80</span> <span class="keyword">template</span><<span class="keyword">typename</span> Type></div>
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<div class="foldopen" id="foldopen00081" data-start="{" data-end="}">
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<div class="line"><a id="l00081" name="l00081"></a><span class="lineno"><a class="line" href="structentt_1_1forward__apply.html#afc1bb10152536953a716529e1772a418"> 81</a></span> <span class="keyword">constexpr</span> <span class="keyword">decltype</span>(<span class="keyword">auto</span>) <span class="keyword">operator</span>()(Type &&<a class="code hl_function" href="namespaceentt.html#a12e4d0c58f9c4cc6f5513c39c530b9b7">args</a>) <span class="keyword">const</span> <span class="keyword">noexcept</span>(<span class="keyword">noexcept</span>(std::apply(std::declval<const Func &>(), <a class="code hl_function" href="namespaceentt.html#a12e4d0c58f9c4cc6f5513c39c530b9b7">args</a>))) {</div>
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<div class="line"><a id="l00082" name="l00082"></a><span class="lineno"> 82</span> <span class="keywordflow">return</span> std::apply(<span class="keyword">static_cast<</span><span class="keyword">const </span>Func &<span class="keyword">></span>(*<span class="keyword">this</span>), std::forward<Type>(<a class="code hl_function" href="namespaceentt.html#a12e4d0c58f9c4cc6f5513c39c530b9b7">args</a>));</div>
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<div class="line"><a id="l00083" name="l00083"></a><span class="lineno"> 83</span> }</div>
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</div>
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<div class="line"><a id="l00084" name="l00084"></a><span class="lineno"> 84</span>};</div>
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</div>
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<div class="line"><a id="l00085" name="l00085"></a><span class="lineno"> 85</span> </div>
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<div class="line"><a id="l00090" name="l00090"></a><span class="lineno"> 90</span><span class="keyword">template</span><<span class="keyword">typename</span> Func></div>
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<div class="line"><a id="l00091" name="l00091"></a><span class="lineno"><a class="line" href="namespaceentt.html#a0662ddd2021dbf1513b7d0b40c50b9b2"> 91</a></span><a class="code hl_function" href="namespaceentt.html#a0662ddd2021dbf1513b7d0b40c50b9b2">forward_apply</a>(Func) -> <a class="code hl_struct" href="structentt_1_1forward__apply.html">forward_apply<std::remove_reference_t<std::remove_cv_t<Func></a>>>;</div>
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<div class="line"><a id="l00092" name="l00092"></a><span class="lineno"> 92</span> </div>
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<div class="line"><a id="l00093" name="l00093"></a><span class="lineno"> 93</span>} <span class="comment">// namespace entt</span></div>
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<div class="line"><a id="l00094" name="l00094"></a><span class="lineno"> 94</span> </div>
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<div class="line"><a id="l00095" name="l00095"></a><span class="lineno"> 95</span><span class="preprocessor">#endif</span></div>
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<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>
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<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="#l00035">tuple.hpp:35</a></div></div>
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<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) -> forward_apply< std::remove_reference_t< std::remove_cv_t< Func > > ></div><div class="ttdoc">Deduction guide.</div></div>
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<div class="ttc" id="anamespaceentt_html_a12e4d0c58f9c4cc6f5513c39c530b9b7"><div class="ttname"><a href="namespaceentt.html#a12e4d0c58f9c4cc6f5513c39c530b9b7">entt::make_obj_using_allocator</a></div><div class="ttdeci">constexpr Type make_obj_using_allocator(const Allocator &allocator, Args &&...args)</div><div class="ttdoc">Uses-allocator construction utility (waiting for C++20).</div><div class="ttdef"><b>Definition</b> <a href="memory_8hpp_source.html#l00219">memory.hpp:219</a></div></div>
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<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 &&value) noexcept</div><div class="ttdoc">Utility function to unwrap tuples of a single element.</div><div class="ttdef"><b>Definition</b> <a href="#l00045">tuple.hpp:45</a></div></div>
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<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="#l00058">tuple.hpp:58</a></div></div>
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<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 &&...args) noexcept(std::is_nothrow_constructible_v< Func, Args... >)</div><div class="ttdoc">Constructs a forward-and-apply object.</div><div class="ttdef"><b>Definition</b> <a href="#l00065">tuple.hpp:65</a></div></div>
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<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="#l00028">tuple.hpp:28</a></div></div>
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