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 <span id="projectnumber">3.3.2</span>
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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="title">utility.hpp</div> </div>
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<div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="preprocessor">#ifndef ENTT_CORE_UTILITY_HPP</span></div>
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<div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="preprocessor">#define ENTT_CORE_UTILITY_HPP</span></div>
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<div class="line"><a name="l00003"></a><span class="lineno"> 3</span>  </div>
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<div class="line"><a name="l00004"></a><span class="lineno"> 4</span>  </div>
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<div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="preprocessor">#include <utility></span></div>
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<div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="preprocessor">#include "../config/config.h"</span></div>
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<div class="line"><a name="l00007"></a><span class="lineno"> 7</span>  </div>
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<div class="line"><a name="l00008"></a><span class="lineno"> 8</span>  </div>
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<div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="keyword">namespace </span><a class="code" href="namespaceentt.html">entt</a> {</div>
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<div class="line"><a name="l00010"></a><span class="lineno"> 10</span>  </div>
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<div class="line"><a name="l00011"></a><span class="lineno"> 11</span>  </div>
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<div class="line"><a name="l00013"></a><span class="lineno"><a class="line" href="structentt_1_1identity.html"> 13</a></span> <span class="keyword">struct </span><a class="code" href="structentt_1_1identity.html">identity</a> {</div>
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<div class="line"><a name="l00020"></a><span class="lineno"> 20</span>  <span class="keyword">template</span><<span class="keyword">class</span> Type></div>
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<div class="line"><a name="l00021"></a><span class="lineno"><a class="line" href="structentt_1_1identity.html#a4663a97f57bf16459d1ca94b74965b5e"> 21</a></span>  constexpr Type && <a class="code" href="structentt_1_1identity.html#a4663a97f57bf16459d1ca94b74965b5e">operator()</a>(Type &&value) <span class="keyword">const</span> ENTT_NOEXCEPT {</div>
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<div class="line"><a name="l00022"></a><span class="lineno"> 22</span>  <span class="keywordflow">return</span> std::forward<Type>(value);</div>
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<div class="line"><a name="l00023"></a><span class="lineno"> 23</span>  }</div>
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<div class="line"><a name="l00024"></a><span class="lineno"> 24</span> };</div>
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<div class="line"><a name="l00025"></a><span class="lineno"> 25</span>  </div>
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<div class="line"><a name="l00026"></a><span class="lineno"> 26</span>  </div>
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<div class="line"><a name="l00034"></a><span class="lineno"> 34</span> <span class="keyword">template</span><<span class="keyword">typename</span> Type, <span class="keyword">typename</span> Class></div>
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<div class="line"><a name="l00035"></a><span class="lineno"><a class="line" href="namespaceentt.html#ae289e7f5640bb43223901039346e5ce0"> 35</a></span> constexpr <span class="keyword">auto</span> <a class="code" href="namespaceentt.html#ae289e7f5640bb43223901039346e5ce0">overload</a>(Type Class:: *member) ENTT_NOEXCEPT { <span class="keywordflow">return</span> member; }</div>
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<div class="line"><a name="l00036"></a><span class="lineno"> 36</span>  </div>
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<div class="line"><a name="l00037"></a><span class="lineno"> 37</span>  </div>
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<div class="line"><a name="l00044"></a><span class="lineno"> 44</span> <span class="keyword">template</span><<span class="keyword">typename</span> Func></div>
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<div class="line"><a name="l00045"></a><span class="lineno"><a class="line" href="namespaceentt.html#a0b5d877510362b358a9e83b0222aca55"> 45</a></span> constexpr <span class="keyword">auto</span> <a class="code" href="namespaceentt.html#ae289e7f5640bb43223901039346e5ce0">overload</a>(Func *func) ENTT_NOEXCEPT { <span class="keywordflow">return</span> func; }</div>
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<div class="line"><a name="l00046"></a><span class="lineno"> 46</span>  </div>
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<div class="line"><a name="l00047"></a><span class="lineno"> 47</span>  </div>
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<div class="line"><a name="l00052"></a><span class="lineno"> 52</span> <span class="keyword">template</span><<span class="keyword">class</span>... Func></div>
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<div class="line"><a name="l00053"></a><span class="lineno"><a class="line" href="structentt_1_1overloaded.html"> 53</a></span> <span class="keyword">struct </span><a class="code" href="structentt_1_1overloaded.html">overloaded</a>: Func... {</div>
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<div class="line"><a name="l00054"></a><span class="lineno"> 54</span>  <span class="keyword">using</span> Func::operator()...;</div>
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<div class="line"><a name="l00055"></a><span class="lineno"> 55</span> };</div>
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<div class="line"><a name="l00056"></a><span class="lineno"> 56</span>  </div>
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<div class="line"><a name="l00057"></a><span class="lineno"> 57</span>  </div>
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<div class="line"><a name="l00062"></a><span class="lineno"> 62</span> <span class="keyword">template</span><<span class="keyword">class</span>... Func></div>
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<div class="line"><a name="l00063"></a><span class="lineno"> 63</span> <a class="code" href="namespaceentt.html#a26eb67ac302229374c5fb623d529f5eb">overloaded</a>(Func...) -> <a class="code" href="structentt_1_1overloaded.html">overloaded</a><Func...>;</div>
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<div class="line"><a name="l00064"></a><span class="lineno"> 64</span>  </div>
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<div class="line"><a name="l00065"></a><span class="lineno"> 65</span>  </div>
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<div class="line"><a name="l00070"></a><span class="lineno"> 70</span> <span class="keyword">template</span><<span class="keyword">class</span> Func></div>
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<div class="line"><a name="l00071"></a><span class="lineno"><a class="line" href="structentt_1_1y__combinator.html"> 71</a></span> <span class="keyword">struct </span><a class="code" href="structentt_1_1y__combinator.html">y_combinator</a> {</div>
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<div class="line"><a name="l00076"></a><span class="lineno"><a class="line" href="structentt_1_1y__combinator.html#a3ef9b5550c3de06bed6297ae3b79815f"> 76</a></span>  <a class="code" href="structentt_1_1y__combinator.html#a3ef9b5550c3de06bed6297ae3b79815f">y_combinator</a>(Func recursive):</div>
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<div class="line"><a name="l00077"></a><span class="lineno"> 77</span>  func{std::move(recursive)}</div>
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<div class="line"><a name="l00078"></a><span class="lineno"> 78</span>  {}</div>
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<div class="line"><a name="l00079"></a><span class="lineno"> 79</span>  </div>
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<div class="line"><a name="l00086"></a><span class="lineno"> 86</span>  <span class="keyword">template</span> <<span class="keyword">class</span>... Args></div>
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<div class="line"><a name="l00087"></a><span class="lineno"><a class="line" href="structentt_1_1y__combinator.html#aaf600432620d702c835ff5555f962c40"> 87</a></span>  decltype(<span class="keyword">auto</span>) operator()(Args &&... args)<span class="keyword"> const </span>{</div>
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<div class="line"><a name="l00088"></a><span class="lineno"> 88</span>  <span class="keywordflow">return</span> func(*<span class="keyword">this</span>, std::forward<Args>(args)...);</div>
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<div class="line"><a name="l00089"></a><span class="lineno"> 89</span>  }</div>
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<div class="line"><a name="l00090"></a><span class="lineno"> 90</span>  </div>
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<div class="line"><a name="l00092"></a><span class="lineno"> 92</span>  <span class="keyword">template</span> <<span class="keyword">class</span>... Args></div>
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<div class="line"><a name="l00093"></a><span class="lineno"><a class="line" href="structentt_1_1y__combinator.html#ab87fd1de40da60ffef1d0ed9b76280a8"> 93</a></span>  decltype(<span class="keyword">auto</span>) operator()(Args &&... args) {</div>
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<div class="line"><a name="l00094"></a><span class="lineno"> 94</span>  <span class="keywordflow">return</span> func(*<span class="keyword">this</span>, std::forward<Args>(args)...);</div>
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<div class="line"><a name="l00095"></a><span class="lineno"> 95</span>  }</div>
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<div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  </div>
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<div class="line"><a name="l00097"></a><span class="lineno"> 97</span> <span class="keyword">private</span>:</div>
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<div class="line"><a name="l00098"></a><span class="lineno"> 98</span>  Func func;</div>
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<div class="line"><a name="l00099"></a><span class="lineno"> 99</span> };</div>
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<div class="line"><a name="l00100"></a><span class="lineno"> 100</span>  </div>
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<div class="line"><a name="l00101"></a><span class="lineno"> 101</span>  </div>
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<div class="line"><a name="l00102"></a><span class="lineno"> 102</span> }</div>
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<div class="line"><a name="l00103"></a><span class="lineno"> 103</span>  </div>
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<div class="line"><a name="l00104"></a><span class="lineno"> 104</span>  </div>
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<div class="line"><a name="l00105"></a><span class="lineno"> 105</span> <span class="preprocessor">#endif</span></div>
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</div><!-- fragment --></div><!-- contents -->
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<div class="ttc" id="astructentt_1_1identity_html"><div class="ttname"><a href="structentt_1_1identity.html">entt::identity</a></div><div class="ttdoc">Identity function object (waiting for C++20).</div><div class="ttdef"><b>Definition:</b> <a href="utility_8hpp_source.html#l00013">utility.hpp:13</a></div></div>
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<div class="ttc" id="astructentt_1_1identity_html_a4663a97f57bf16459d1ca94b74965b5e"><div class="ttname"><a href="structentt_1_1identity.html#a4663a97f57bf16459d1ca94b74965b5e">entt::identity::operator()</a></div><div class="ttdeci">constexpr Type && operator()(Type &&value) const ENTT_NOEXCEPT</div><div class="ttdoc">Returns its argument unchanged.</div><div class="ttdef"><b>Definition:</b> <a href="utility_8hpp_source.html#l00021">utility.hpp:21</a></div></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="algorithm_8hpp_source.html#l00013">algorithm.hpp:13</a></div></div>
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<div class="ttc" id="astructentt_1_1y__combinator_html"><div class="ttname"><a href="structentt_1_1y__combinator.html">entt::y_combinator</a></div><div class="ttdoc">Basic implementation of a y-combinator.</div><div class="ttdef"><b>Definition:</b> <a href="utility_8hpp_source.html#l00071">utility.hpp:71</a></div></div>
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<div class="ttc" id="anamespaceentt_html_ae289e7f5640bb43223901039346e5ce0"><div class="ttname"><a href="namespaceentt.html#ae289e7f5640bb43223901039346e5ce0">entt::overload</a></div><div class="ttdeci">constexpr auto overload(Type Class::*member) ENTT_NOEXCEPT</div><div class="ttdoc">Constant utility to disambiguate overloaded members of a class.</div><div class="ttdef"><b>Definition:</b> <a href="utility_8hpp_source.html#l00035">utility.hpp:35</a></div></div>
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<div class="ttc" id="anamespaceentt_html_a26eb67ac302229374c5fb623d529f5eb"><div class="ttname"><a href="namespaceentt.html#a26eb67ac302229374c5fb623d529f5eb">entt::overloaded</a></div><div class="ttdeci">overloaded(Func...) -> overloaded< Func... ></div><div class="ttdoc">Deduction guide.</div></div>
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<div class="ttc" id="astructentt_1_1overloaded_html"><div class="ttname"><a href="structentt_1_1overloaded.html">entt::overloaded</a></div><div class="ttdoc">Helper type for visitors.</div><div class="ttdef"><b>Definition:</b> <a href="utility_8hpp_source.html#l00053">utility.hpp:53</a></div></div>
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<div class="ttc" id="astructentt_1_1y__combinator_html_a3ef9b5550c3de06bed6297ae3b79815f"><div class="ttname"><a href="structentt_1_1y__combinator.html#a3ef9b5550c3de06bed6297ae3b79815f">entt::y_combinator::y_combinator</a></div><div class="ttdeci">y_combinator(Func recursive)</div><div class="ttdoc">Constructs a y-combinator from a given function.</div><div class="ttdef"><b>Definition:</b> <a href="utility_8hpp_source.html#l00076">utility.hpp:76</a></div></div>
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