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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">compressed_pair.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_COMPRESSED_PAIR_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_COMPRESSED_PAIR_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 <cstddef></span></div>
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<div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="preprocessor">#include <tuple></span></div>
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<div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="preprocessor">#include <type_traits></span></div>
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<div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="preprocessor">#include <utility></span></div>
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<div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="preprocessor">#include "../config/config.h"</span></div>
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<div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="preprocessor">#include "type_traits.hpp"</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="l00012"></a><span class="lineno"> 12</span>  </div>
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<div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="keyword">namespace </span><a class="code" href="namespaceentt.html">entt</a> {</div>
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<div class="line"><a name="l00014"></a><span class="lineno"> 14</span>  </div>
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<div class="line"><a name="l00015"></a><span class="lineno"> 15</span>  </div>
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<div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="keyword">namespace </span>internal {</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> <span class="keyword">template</span><<span class="keyword">typename</span> Type, std::<span class="keywordtype">size_t</span>, <span class="keyword">typename</span> = <span class="keywordtype">void</span>></div>
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<div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="keyword">struct </span>compressed_pair_element {</div>
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<div class="line"><a name="l00027"></a><span class="lineno"> 27</span>  <span class="keyword">template</span><<span class="keywordtype">bool</span> Dummy = true, <span class="keyword">typename</span> = std::enable_if_t<Dummy && std::is_default_constructible_v<Type>>></div>
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<div class="line"><a name="l00028"></a><span class="lineno"> 28</span>  compressed_pair_element()</div>
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<div class="line"><a name="l00029"></a><span class="lineno"> 29</span>  : value{}</div>
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<div class="line"><a name="l00030"></a><span class="lineno"> 30</span>  {}</div>
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<div class="line"><a name="l00031"></a><span class="lineno"> 31</span>  </div>
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<div class="line"><a name="l00032"></a><span class="lineno"> 32</span>  <span class="keyword">template</span><<span class="keyword">typename</span> Args, <span class="keyword">typename</span> = std::enable_if_t<!std::is_same_v<std::decay_t<Args>, compressed_pair_element>>></div>
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<div class="line"><a name="l00033"></a><span class="lineno"> 33</span>  compressed_pair_element(Args &&args)</div>
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<div class="line"><a name="l00034"></a><span class="lineno"> 34</span>  : value{std::forward<Args>(args)}</div>
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<div class="line"><a name="l00035"></a><span class="lineno"> 35</span>  {}</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>  <span class="keyword">template</span><<span class="keyword">typename</span>... Args, std::size_t... Index></div>
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<div class="line"><a name="l00038"></a><span class="lineno"> 38</span>  compressed_pair_element(std::tuple<Args...> args, std::index_sequence<Index...>)</div>
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<div class="line"><a name="l00039"></a><span class="lineno"> 39</span>  : value{std::<a class="code" href="namespaceentt.html#a8c24ecc5ab0055f9f2a4725c95afb29e">get</a><Index>(args)...}</div>
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<div class="line"><a name="l00040"></a><span class="lineno"> 40</span>  {}</div>
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<div class="line"><a name="l00041"></a><span class="lineno"> 41</span>  </div>
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<div class="line"><a name="l00042"></a><span class="lineno"> 42</span>  [[nodiscard]] Type & <a class="code" href="namespaceentt.html#a8c24ecc5ab0055f9f2a4725c95afb29e">get</a>() ENTT_NOEXCEPT {</div>
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<div class="line"><a name="l00043"></a><span class="lineno"> 43</span>  <span class="keywordflow">return</span> value;</div>
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<div class="line"><a name="l00044"></a><span class="lineno"> 44</span>  }</div>
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<div class="line"><a name="l00045"></a><span class="lineno"> 45</span>  </div>
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<div class="line"><a name="l00046"></a><span class="lineno"> 46</span>  [[nodiscard]] <span class="keyword">const</span> Type & <a class="code" href="namespaceentt.html#a8c24ecc5ab0055f9f2a4725c95afb29e">get</a>() const ENTT_NOEXCEPT {</div>
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<div class="line"><a name="l00047"></a><span class="lineno"> 47</span>  <span class="keywordflow">return</span> value;</div>
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<div class="line"><a name="l00048"></a><span class="lineno"> 48</span>  }</div>
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<div class="line"><a name="l00049"></a><span class="lineno"> 49</span>  </div>
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<div class="line"><a name="l00050"></a><span class="lineno"> 50</span> <span class="keyword">private</span>:</div>
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<div class="line"><a name="l00051"></a><span class="lineno"> 51</span>  Type value;</div>
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<div class="line"><a name="l00052"></a><span class="lineno"> 52</span> };</div>
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<div class="line"><a name="l00053"></a><span class="lineno"> 53</span>  </div>
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<div class="line"><a name="l00054"></a><span class="lineno"> 54</span>  </div>
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<div class="line"><a name="l00055"></a><span class="lineno"> 55</span> <span class="keyword">template</span><<span class="keyword">typename</span> Type, std::<span class="keywordtype">size_t</span> Tag></div>
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<div class="line"><a name="l00056"></a><span class="lineno"> 56</span> <span class="keyword">struct </span>compressed_pair_element<Type, Tag, std::enable_if_t<is_ebco_eligible_v<Type>>></div>
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<div class="line"><a name="l00057"></a><span class="lineno"> 57</span>  : Type</div>
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<div class="line"><a name="l00058"></a><span class="lineno"> 58</span> {</div>
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<div class="line"><a name="l00059"></a><span class="lineno"> 59</span>  <span class="keyword">template</span><<span class="keywordtype">bool</span> Dummy = true, <span class="keyword">typename</span> = std::enable_if_t<Dummy && std::is_default_constructible_v<Type>>></div>
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<div class="line"><a name="l00060"></a><span class="lineno"> 60</span>  compressed_pair_element()</div>
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<div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  : Type{}</div>
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<div class="line"><a name="l00062"></a><span class="lineno"> 62</span>  {}</div>
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<div class="line"><a name="l00063"></a><span class="lineno"> 63</span>  </div>
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<div class="line"><a name="l00064"></a><span class="lineno"> 64</span>  <span class="keyword">template</span><<span class="keyword">typename</span> Args, <span class="keyword">typename</span> = std::enable_if_t<!std::is_same_v<std::decay_t<Args>, compressed_pair_element>>></div>
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<div class="line"><a name="l00065"></a><span class="lineno"> 65</span>  compressed_pair_element(Args &&args)</div>
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<div class="line"><a name="l00066"></a><span class="lineno"> 66</span>  : Type{std::forward<Args>(args)}</div>
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<div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  {}</div>
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<div class="line"><a name="l00068"></a><span class="lineno"> 68</span>  </div>
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<div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  <span class="keyword">template</span><<span class="keyword">typename</span>... Args, std::size_t... Index></div>
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<div class="line"><a name="l00070"></a><span class="lineno"> 70</span>  compressed_pair_element(std::tuple<Args...> args, std::index_sequence<Index...>)</div>
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<div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  : Type{std::<a class="code" href="namespaceentt.html#a8c24ecc5ab0055f9f2a4725c95afb29e">get</a><Index>(args)...}</div>
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<div class="line"><a name="l00072"></a><span class="lineno"> 72</span>  {}</div>
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<div class="line"><a name="l00073"></a><span class="lineno"> 73</span>  </div>
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<div class="line"><a name="l00074"></a><span class="lineno"> 74</span>  [[nodiscard]] Type & <a class="code" href="namespaceentt.html#a8c24ecc5ab0055f9f2a4725c95afb29e">get</a>() ENTT_NOEXCEPT {</div>
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<div class="line"><a name="l00075"></a><span class="lineno"> 75</span>  <span class="keywordflow">return</span> *<span class="keyword">this</span>;</div>
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<div class="line"><a name="l00076"></a><span class="lineno"> 76</span>  }</div>
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<div class="line"><a name="l00077"></a><span class="lineno"> 77</span>  </div>
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<div class="line"><a name="l00078"></a><span class="lineno"> 78</span>  [[nodiscard]] <span class="keyword">const</span> Type & <a class="code" href="namespaceentt.html#a8c24ecc5ab0055f9f2a4725c95afb29e">get</a>() const ENTT_NOEXCEPT {</div>
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<div class="line"><a name="l00079"></a><span class="lineno"> 79</span>  <span class="keywordflow">return</span> *<span class="keyword">this</span>;</div>
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<div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  }</div>
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<div class="line"><a name="l00081"></a><span class="lineno"> 81</span> };</div>
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<div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  </div>
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<div class="line"><a name="l00083"></a><span class="lineno"> 83</span>  </div>
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<div class="line"><a name="l00084"></a><span class="lineno"> 84</span> }</div>
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<div class="line"><a name="l00085"></a><span class="lineno"> 85</span>  </div>
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<div class="line"><a name="l00086"></a><span class="lineno"> 86</span>  </div>
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<div class="line"><a name="l00102"></a><span class="lineno"> 102</span> <span class="keyword">template</span><<span class="keyword">typename</span> First, <span class="keyword">typename</span> Second></div>
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<div class="line"><a name="l00103"></a><span class="lineno"><a class="line" href="classentt_1_1compressed__pair.html"> 103</a></span> <span class="keyword">class </span><a class="code" href="classentt_1_1compressed__pair.html">compressed_pair</a> final:</div>
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<div class="line"><a name="l00104"></a><span class="lineno"> 104</span>  internal::compressed_pair_element<First, 0u>,</div>
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<div class="line"><a name="l00105"></a><span class="lineno"> 105</span>  internal::compressed_pair_element<Second, 1u></div>
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<div class="line"><a name="l00106"></a><span class="lineno"> 106</span> {</div>
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<div class="line"><a name="l00107"></a><span class="lineno"> 107</span>  <span class="keyword">using</span> first_base = internal::compressed_pair_element<First, 0u>;</div>
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<div class="line"><a name="l00108"></a><span class="lineno"> 108</span>  <span class="keyword">using</span> second_base = internal::compressed_pair_element<Second, 1u>;</div>
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<div class="line"><a name="l00109"></a><span class="lineno"> 109</span>  </div>
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<div class="line"><a name="l00110"></a><span class="lineno"> 110</span> <span class="keyword">public</span>:</div>
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<div class="line"><a name="l00119"></a><span class="lineno"> 119</span>  <span class="keyword">template</span><<span class="keywordtype">bool</span> Dummy = true, <span class="keyword">typename</span> = std::enable_if_t<Dummy && std::is_default_constructible_v<First> && std::is_default_constructible_v<Second>>></div>
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<div class="line"><a name="l00120"></a><span class="lineno"><a class="line" href="classentt_1_1compressed__pair.html#ad232c3555664edad7dc1425672245054"> 120</a></span>  constexpr <a class="code" href="classentt_1_1compressed__pair.html#ad232c3555664edad7dc1425672245054">compressed_pair</a>()</div>
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<div class="line"><a name="l00121"></a><span class="lineno"> 121</span>  : first_base{},</div>
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<div class="line"><a name="l00122"></a><span class="lineno"> 122</span>  second_base{}</div>
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<div class="line"><a name="l00123"></a><span class="lineno"> 123</span>  {}</div>
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<div class="line"><a name="l00124"></a><span class="lineno"> 124</span>  </div>
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<div class="line"><a name="l00129"></a><span class="lineno"><a class="line" href="classentt_1_1compressed__pair.html#a2a25fcd5670e614428cbb8b929f02fca"> 129</a></span>  constexpr <a class="code" href="classentt_1_1compressed__pair.html#a2a25fcd5670e614428cbb8b929f02fca">compressed_pair</a>(<span class="keyword">const</span> <a class="code" href="classentt_1_1compressed__pair.html">compressed_pair</a> &other) = <span class="keywordflow">default</span>;</div>
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<div class="line"><a name="l00130"></a><span class="lineno"> 130</span>  </div>
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<div class="line"><a name="l00135"></a><span class="lineno"><a class="line" href="classentt_1_1compressed__pair.html#a91c6019fb88342859008675265a8d7d0"> 135</a></span>  constexpr <a class="code" href="classentt_1_1compressed__pair.html#a91c6019fb88342859008675265a8d7d0">compressed_pair</a>(<a class="code" href="classentt_1_1compressed__pair.html">compressed_pair</a> &&other) ENTT_NOEXCEPT = <span class="keywordflow">default</span>;</div>
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<div class="line"><a name="l00136"></a><span class="lineno"> 136</span>  </div>
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<div class="line"><a name="l00144"></a><span class="lineno"> 144</span>  <span class="keyword">template</span><<span class="keyword">typename</span> Arg, <span class="keyword">typename</span> Other></div>
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<div class="line"><a name="l00145"></a><span class="lineno"><a class="line" href="classentt_1_1compressed__pair.html#a728283e0d45f7f13d762642a48a10e76"> 145</a></span>  constexpr <a class="code" href="classentt_1_1compressed__pair.html#a728283e0d45f7f13d762642a48a10e76">compressed_pair</a>(Arg &&arg, Other &&other)</div>
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<div class="line"><a name="l00146"></a><span class="lineno"> 146</span>  : first_base{std::forward<Arg>(arg)},</div>
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<div class="line"><a name="l00147"></a><span class="lineno"> 147</span>  second_base{std::forward<Other>(other)}</div>
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<div class="line"><a name="l00148"></a><span class="lineno"> 148</span>  {}</div>
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<div class="line"><a name="l00149"></a><span class="lineno"> 149</span>  </div>
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<div class="line"><a name="l00157"></a><span class="lineno"> 157</span>  <span class="keyword">template</span><<span class="keyword">typename</span>... Args, <span class="keyword">typename</span>... Other></div>
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<div class="line"><a name="l00158"></a><span class="lineno"><a class="line" href="classentt_1_1compressed__pair.html#aed863f3bd0bde61f52c9cce84e9ecaac"> 158</a></span>  constexpr <a class="code" href="classentt_1_1compressed__pair.html#aed863f3bd0bde61f52c9cce84e9ecaac">compressed_pair</a>(std::piecewise_construct_t, std::tuple<Args...> args, std::tuple<Other...> other)</div>
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<div class="line"><a name="l00159"></a><span class="lineno"> 159</span>  : first_base{std::move(args), std::index_sequence_for<Args...>{}},</div>
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<div class="line"><a name="l00160"></a><span class="lineno"> 160</span>  second_base{std::move(other), std::index_sequence_for<Other...>{}}</div>
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<div class="line"><a name="l00161"></a><span class="lineno"> 161</span>  {}</div>
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<div class="line"><a name="l00162"></a><span class="lineno"> 162</span>  </div>
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<div class="line"><a name="l00168"></a><span class="lineno"><a class="line" href="classentt_1_1compressed__pair.html#a73b4a959b934357bc41b8e9c53b47496"> 168</a></span>  constexpr <a class="code" href="classentt_1_1compressed__pair.html">compressed_pair</a> & <a class="code" href="classentt_1_1compressed__pair.html#a73b4a959b934357bc41b8e9c53b47496">operator=</a>(<span class="keyword">const</span> <a class="code" href="classentt_1_1compressed__pair.html">compressed_pair</a> &other) = <span class="keywordflow">default</span>;</div>
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<div class="line"><a name="l00169"></a><span class="lineno"> 169</span>  </div>
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<div class="line"><a name="l00175"></a><span class="lineno"><a class="line" href="classentt_1_1compressed__pair.html#ad61f40edf314083598c0b0d76aa90fa1"> 175</a></span>  constexpr <a class="code" href="classentt_1_1compressed__pair.html">compressed_pair</a> & <a class="code" href="classentt_1_1compressed__pair.html#ad61f40edf314083598c0b0d76aa90fa1">operator=</a>(<a class="code" href="classentt_1_1compressed__pair.html">compressed_pair</a> &&other) ENTT_NOEXCEPT = <span class="keywordflow">default</span>;</div>
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<div class="line"><a name="l00176"></a><span class="lineno"> 176</span>  </div>
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<div class="line"><a name="l00181"></a><span class="lineno"><a class="line" href="classentt_1_1compressed__pair.html#a9f9b02cd48fa5bcfdf02daf7bcb5c323"> 181</a></span>  [[nodiscard]] First & <a class="code" href="classentt_1_1compressed__pair.html#a9f9b02cd48fa5bcfdf02daf7bcb5c323">first</a>() ENTT_NOEXCEPT {</div>
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<div class="line"><a name="l00182"></a><span class="lineno"> 182</span>  <span class="keywordflow">return</span> <span class="keyword">static_cast<</span>first_base &<span class="keyword">></span>(*this).get();</div>
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<div class="line"><a name="l00183"></a><span class="lineno"> 183</span>  }</div>
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<div class="line"><a name="l00184"></a><span class="lineno"> 184</span>  </div>
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<div class="line"><a name="l00186"></a><span class="lineno"><a class="line" href="classentt_1_1compressed__pair.html#ab812ce791239d9f83be90ce79968ee57"> 186</a></span>  [[nodiscard]] <span class="keyword">const</span> First & <a class="code" href="classentt_1_1compressed__pair.html#ab812ce791239d9f83be90ce79968ee57">first</a>() const ENTT_NOEXCEPT {</div>
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<div class="line"><a name="l00187"></a><span class="lineno"> 187</span>  <span class="keywordflow">return</span> <span class="keyword">static_cast<</span><span class="keyword">const </span>first_base &<span class="keyword">></span>(*this).get();</div>
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<div class="line"><a name="l00188"></a><span class="lineno"> 188</span>  }</div>
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<div class="line"><a name="l00189"></a><span class="lineno"> 189</span>  </div>
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<div class="line"><a name="l00194"></a><span class="lineno"><a class="line" href="classentt_1_1compressed__pair.html#aef21988f782e5707089106d2c1153824"> 194</a></span>  [[nodiscard]] Second & <a class="code" href="classentt_1_1compressed__pair.html#aef21988f782e5707089106d2c1153824">second</a>() ENTT_NOEXCEPT {</div>
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<div class="line"><a name="l00195"></a><span class="lineno"> 195</span>  <span class="keywordflow">return</span> <span class="keyword">static_cast<</span>second_base &<span class="keyword">></span>(*this).get();</div>
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<div class="line"><a name="l00196"></a><span class="lineno"> 196</span>  }</div>
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<div class="line"><a name="l00197"></a><span class="lineno"> 197</span>  </div>
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<div class="line"><a name="l00199"></a><span class="lineno"><a class="line" href="classentt_1_1compressed__pair.html#a36f553775a9f0bf555396587dc171513"> 199</a></span>  [[nodiscard]] <span class="keyword">const</span> Second & <a class="code" href="classentt_1_1compressed__pair.html#a36f553775a9f0bf555396587dc171513">second</a>() const ENTT_NOEXCEPT {</div>
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<div class="line"><a name="l00200"></a><span class="lineno"> 200</span>  <span class="keywordflow">return</span> <span class="keyword">static_cast<</span><span class="keyword">const </span>second_base &<span class="keyword">></span>(*this).get();</div>
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<div class="line"><a name="l00201"></a><span class="lineno"> 201</span>  }</div>
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<div class="line"><a name="l00202"></a><span class="lineno"> 202</span>  </div>
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<div class="line"><a name="l00207"></a><span class="lineno"><a class="line" href="classentt_1_1compressed__pair.html#a1f153123bcde4947f020ea2459d76e45"> 207</a></span>  <span class="keywordtype">void</span> <a class="code" href="classentt_1_1compressed__pair.html#a1f153123bcde4947f020ea2459d76e45">swap</a>(<a class="code" href="classentt_1_1compressed__pair.html">compressed_pair</a> &other) {</div>
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<div class="line"><a name="l00208"></a><span class="lineno"> 208</span>  <span class="keyword">using</span> std::swap;</div>
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<div class="line"><a name="l00209"></a><span class="lineno"> 209</span>  <a class="code" href="namespaceentt.html#aef08fc4202f32f712bde26f55db463cb">swap</a>(first(), other.<a class="code" href="classentt_1_1compressed__pair.html#a9f9b02cd48fa5bcfdf02daf7bcb5c323">first</a>());</div>
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<div class="line"><a name="l00210"></a><span class="lineno"> 210</span>  <a class="code" href="namespaceentt.html#aef08fc4202f32f712bde26f55db463cb">swap</a>(second(), other.<a class="code" href="classentt_1_1compressed__pair.html#aef21988f782e5707089106d2c1153824">second</a>());</div>
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<div class="line"><a name="l00211"></a><span class="lineno"> 211</span>  }</div>
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<div class="line"><a name="l00212"></a><span class="lineno"> 212</span>  </div>
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<div class="line"><a name="l00219"></a><span class="lineno"> 219</span>  <span class="keyword">template</span><std::<span class="keywordtype">size_t</span> Index></div>
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<div class="line"><a name="l00220"></a><span class="lineno"><a class="line" href="classentt_1_1compressed__pair.html#a26925f0fdea3a43aab4bb53763a377af"> 220</a></span>  decltype(<span class="keyword">auto</span>) <a class="code" href="namespaceentt.html#a8c24ecc5ab0055f9f2a4725c95afb29e">get</a>() ENTT_NOEXCEPT {</div>
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<div class="line"><a name="l00221"></a><span class="lineno"> 221</span>  <span class="keywordflow">if</span> constexpr(Index == 0u) {</div>
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<div class="line"><a name="l00222"></a><span class="lineno"> 222</span>  <span class="keywordflow">return</span> first();</div>
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<div class="line"><a name="l00223"></a><span class="lineno"> 223</span>  } <span class="keywordflow">else</span> {</div>
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<div class="line"><a name="l00224"></a><span class="lineno"> 224</span>  static_assert(Index == 1u, <span class="stringliteral">"Index out of bounds"</span>);</div>
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<div class="line"><a name="l00225"></a><span class="lineno"> 225</span>  <span class="keywordflow">return</span> second();</div>
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<div class="line"><a name="l00226"></a><span class="lineno"> 226</span>  }</div>
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<div class="line"><a name="l00227"></a><span class="lineno"> 227</span>  }</div>
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<div class="line"><a name="l00228"></a><span class="lineno"> 228</span>  </div>
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<div class="line"><a name="l00230"></a><span class="lineno"> 230</span>  <span class="keyword">template</span><std::<span class="keywordtype">size_t</span> Index></div>
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<div class="line"><a name="l00231"></a><span class="lineno"><a class="line" href="classentt_1_1compressed__pair.html#a74e585a52a150969030cf28867de1ca5"> 231</a></span>  decltype(<span class="keyword">auto</span>) <a class="code" href="namespaceentt.html#a8c24ecc5ab0055f9f2a4725c95afb29e">get</a>() const ENTT_NOEXCEPT {</div>
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<div class="line"><a name="l00232"></a><span class="lineno"> 232</span>  <span class="keywordflow">if</span> constexpr(Index == 0u) {</div>
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<div class="line"><a name="l00233"></a><span class="lineno"> 233</span>  <span class="keywordflow">return</span> first();</div>
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<div class="line"><a name="l00234"></a><span class="lineno"> 234</span>  } <span class="keywordflow">else</span> {</div>
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<div class="line"><a name="l00235"></a><span class="lineno"> 235</span>  static_assert(Index == 1u, <span class="stringliteral">"Index out of bounds"</span>);</div>
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<div class="line"><a name="l00236"></a><span class="lineno"> 236</span>  <span class="keywordflow">return</span> second();</div>
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<div class="line"><a name="l00237"></a><span class="lineno"> 237</span>  }</div>
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<div class="line"><a name="l00238"></a><span class="lineno"> 238</span>  }</div>
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<div class="line"><a name="l00239"></a><span class="lineno"> 239</span> };</div>
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<div class="line"><a name="l00240"></a><span class="lineno"> 240</span>  </div>
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<div class="line"><a name="l00241"></a><span class="lineno"> 241</span>  </div>
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<div class="line"><a name="l00247"></a><span class="lineno"> 247</span> <span class="keyword">template</span><<span class="keyword">typename</span> Type, <span class="keyword">typename</span> Other></div>
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<div class="line"><a name="l00248"></a><span class="lineno"><a class="line" href="namespaceentt.html#af638f85aa855e8364af76d8bf93eee3b"> 248</a></span> <a class="code" href="classentt_1_1compressed__pair.html">compressed_pair</a>(Type &&, Other &&)</div>
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<div class="line"><a name="l00249"></a><span class="lineno"> 249</span> -> <a class="code" href="classentt_1_1compressed__pair.html">compressed_pair<std::decay_t<Type></a>, std::decay_t<Other>>;</div>
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<div class="line"><a name="l00250"></a><span class="lineno"> 250</span>  </div>
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<div class="line"><a name="l00251"></a><span class="lineno"> 251</span>  </div>
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<div class="line"><a name="l00259"></a><span class="lineno"> 259</span> <span class="keyword">template</span><<span class="keyword">typename</span> First, <span class="keyword">typename</span> Second></div>
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<div class="line"><a name="l00260"></a><span class="lineno"><a class="line" href="namespaceentt.html#aef08fc4202f32f712bde26f55db463cb"> 260</a></span> <span class="keyword">inline</span> <span class="keywordtype">void</span> <a class="code" href="namespaceentt.html#aef08fc4202f32f712bde26f55db463cb">swap</a>(<a class="code" href="classentt_1_1compressed__pair.html">compressed_pair<First, Second></a> &lhs, <a class="code" href="classentt_1_1compressed__pair.html">compressed_pair<First, Second></a> &rhs) {</div>
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<div class="line"><a name="l00261"></a><span class="lineno"> 261</span>  lhs.<a class="code" href="classentt_1_1compressed__pair.html#a1f153123bcde4947f020ea2459d76e45">swap</a>(rhs);</div>
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<div class="line"><a name="l00262"></a><span class="lineno"> 262</span> }</div>
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<div class="line"><a name="l00263"></a><span class="lineno"> 263</span>  </div>
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<div class="line"><a name="l00264"></a><span class="lineno"> 264</span>  </div>
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<div class="line"><a name="l00265"></a><span class="lineno"> 265</span> }</div>
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<div class="line"><a name="l00266"></a><span class="lineno"> 266</span>  </div>
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<div class="line"><a name="l00267"></a><span class="lineno"> 267</span>  </div>
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<div class="line"><a name="l00268"></a><span class="lineno"> 268</span> <span class="keyword">namespace </span>std {</div>
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<div class="line"><a name="l00269"></a><span class="lineno"> 269</span>  <span class="keyword">template</span><<span class="keyword">typename</span> First, <span class="keyword">typename</span> Second></div>
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<div class="line"><a name="l00270"></a><span class="lineno"><a class="line" href="structstd_1_1tuple__size_3_01entt_1_1compressed__pair_3_01First_00_01Second_01_4_01_4.html"> 270</a></span>  <span class="keyword">struct </span>tuple_size<<a class="code" href="namespaceentt.html">entt</a>::compressed_pair<First, Second>>: integral_constant<size_t, 2u> {};</div>
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<div class="line"><a name="l00271"></a><span class="lineno"> 271</span>  </div>
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<div class="line"><a name="l00272"></a><span class="lineno"> 272</span>  <span class="keyword">template</span><<span class="keywordtype">size_t</span> Index, <span class="keyword">typename</span> First, <span class="keyword">typename</span> Second></div>
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<div class="line"><a name="l00273"></a><span class="lineno"><a class="line" href="structstd_1_1tuple__element_3_01Index_00_01entt_1_1compressed__pair_3_01First_00_01Second_01_4_01_4.html"> 273</a></span>  <span class="keyword">struct </span>tuple_element<Index, <a class="code" href="namespaceentt.html">entt</a>::compressed_pair<First, Second>>: conditional<Index == 0u, First, Second> {</div>
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<div class="line"><a name="l00274"></a><span class="lineno"> 274</span>  static_assert(Index < 2u, <span class="stringliteral">"Index out of bounds"</span>);</div>
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<div class="line"><a name="l00275"></a><span class="lineno"> 275</span>  };</div>
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<div class="line"><a name="l00276"></a><span class="lineno"> 276</span> }</div>
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<div class="line"><a name="l00277"></a><span class="lineno"> 277</span>  </div>
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<div class="line"><a name="l00278"></a><span class="lineno"> 278</span>  </div>
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<div class="line"><a name="l00279"></a><span class="lineno"> 279</span> <span class="preprocessor">#endif</span></div>
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<div class="ttc" id="aclassentt_1_1compressed__pair_html"><div class="ttname"><a href="classentt_1_1compressed__pair.html">entt::compressed_pair</a></div><div class="ttdoc">A compressed pair.</div><div class="ttdef"><b>Definition:</b> <a href="compressed__pair_8hpp_source.html#l00103">compressed_pair.hpp:106</a></div></div>
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<div class="ttc" id="aclassentt_1_1compressed__pair_html_a1f153123bcde4947f020ea2459d76e45"><div class="ttname"><a href="classentt_1_1compressed__pair.html#a1f153123bcde4947f020ea2459d76e45">entt::compressed_pair::swap</a></div><div class="ttdeci">void swap(compressed_pair &other)</div><div class="ttdoc">Swaps two compressed pair objects.</div><div class="ttdef"><b>Definition:</b> <a href="compressed__pair_8hpp_source.html#l00207">compressed_pair.hpp:207</a></div></div>
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<div class="ttc" id="aclassentt_1_1compressed__pair_html_a2a25fcd5670e614428cbb8b929f02fca"><div class="ttname"><a href="classentt_1_1compressed__pair.html#a2a25fcd5670e614428cbb8b929f02fca">entt::compressed_pair::compressed_pair</a></div><div class="ttdeci">constexpr compressed_pair(const compressed_pair &other)=default</div><div class="ttdoc">Copy constructor.</div></div>
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<div class="ttc" id="aclassentt_1_1compressed__pair_html_a36f553775a9f0bf555396587dc171513"><div class="ttname"><a href="classentt_1_1compressed__pair.html#a36f553775a9f0bf555396587dc171513">entt::compressed_pair::second</a></div><div class="ttdeci">const Second & second() const</div><div class="ttdoc">Returns the second element that a pair stores.</div><div class="ttdef"><b>Definition:</b> <a href="compressed__pair_8hpp_source.html#l00199">compressed_pair.hpp:199</a></div></div>
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<div class="ttc" id="aclassentt_1_1compressed__pair_html_a728283e0d45f7f13d762642a48a10e76"><div class="ttname"><a href="classentt_1_1compressed__pair.html#a728283e0d45f7f13d762642a48a10e76">entt::compressed_pair::compressed_pair</a></div><div class="ttdeci">constexpr compressed_pair(Arg &&arg, Other &&other)</div><div class="ttdoc">Constructs a pair from its values.</div><div class="ttdef"><b>Definition:</b> <a href="compressed__pair_8hpp_source.html#l00145">compressed_pair.hpp:145</a></div></div>
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<div class="ttc" id="aclassentt_1_1compressed__pair_html_a73b4a959b934357bc41b8e9c53b47496"><div class="ttname"><a href="classentt_1_1compressed__pair.html#a73b4a959b934357bc41b8e9c53b47496">entt::compressed_pair::operator=</a></div><div class="ttdeci">constexpr compressed_pair & operator=(const compressed_pair &other)=default</div><div class="ttdoc">Copy assignment operator.</div></div>
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<div class="ttc" id="aclassentt_1_1compressed__pair_html_a91c6019fb88342859008675265a8d7d0"><div class="ttname"><a href="classentt_1_1compressed__pair.html#a91c6019fb88342859008675265a8d7d0">entt::compressed_pair::compressed_pair</a></div><div class="ttdeci">constexpr compressed_pair(compressed_pair &&other)=default</div><div class="ttdoc">Move constructor.</div></div>
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<div class="ttc" id="aclassentt_1_1compressed__pair_html_a9f9b02cd48fa5bcfdf02daf7bcb5c323"><div class="ttname"><a href="classentt_1_1compressed__pair.html#a9f9b02cd48fa5bcfdf02daf7bcb5c323">entt::compressed_pair::first</a></div><div class="ttdeci">First & first()</div><div class="ttdoc">Returns the first element that a pair stores.</div><div class="ttdef"><b>Definition:</b> <a href="compressed__pair_8hpp_source.html#l00181">compressed_pair.hpp:181</a></div></div>
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<div class="ttc" id="aclassentt_1_1compressed__pair_html_ab812ce791239d9f83be90ce79968ee57"><div class="ttname"><a href="classentt_1_1compressed__pair.html#ab812ce791239d9f83be90ce79968ee57">entt::compressed_pair::first</a></div><div class="ttdeci">const First & first() const</div><div class="ttdoc">Returns the first element that a pair stores.</div><div class="ttdef"><b>Definition:</b> <a href="compressed__pair_8hpp_source.html#l00186">compressed_pair.hpp:186</a></div></div>
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<div class="ttc" id="aclassentt_1_1compressed__pair_html_ad232c3555664edad7dc1425672245054"><div class="ttname"><a href="classentt_1_1compressed__pair.html#ad232c3555664edad7dc1425672245054">entt::compressed_pair::compressed_pair</a></div><div class="ttdeci">constexpr compressed_pair()</div><div class="ttdoc">Default constructor, conditionally enabled.</div><div class="ttdef"><b>Definition:</b> <a href="compressed__pair_8hpp_source.html#l00120">compressed_pair.hpp:120</a></div></div>
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<div class="ttc" id="aclassentt_1_1compressed__pair_html_ad61f40edf314083598c0b0d76aa90fa1"><div class="ttname"><a href="classentt_1_1compressed__pair.html#ad61f40edf314083598c0b0d76aa90fa1">entt::compressed_pair::operator=</a></div><div class="ttdeci">constexpr compressed_pair & operator=(compressed_pair &&other)=default</div><div class="ttdoc">Move assignment operator.</div></div>
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<div class="ttc" id="aclassentt_1_1compressed__pair_html_aed863f3bd0bde61f52c9cce84e9ecaac"><div class="ttname"><a href="classentt_1_1compressed__pair.html#aed863f3bd0bde61f52c9cce84e9ecaac">entt::compressed_pair::compressed_pair</a></div><div class="ttdeci">constexpr compressed_pair(std::piecewise_construct_t, std::tuple< Args... > args, std::tuple< Other... > other)</div><div class="ttdoc">Constructs a pair by forwarding the arguments to its parts.</div><div class="ttdef"><b>Definition:</b> <a href="compressed__pair_8hpp_source.html#l00158">compressed_pair.hpp:158</a></div></div>
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<div class="ttc" id="aclassentt_1_1compressed__pair_html_aef21988f782e5707089106d2c1153824"><div class="ttname"><a href="classentt_1_1compressed__pair.html#aef21988f782e5707089106d2c1153824">entt::compressed_pair::second</a></div><div class="ttdeci">Second & second()</div><div class="ttdoc">Returns the second element that a pair stores.</div><div class="ttdef"><b>Definition:</b> <a href="compressed__pair_8hpp_source.html#l00194">compressed_pair.hpp:194</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="anamespaceentt_html_a8c24ecc5ab0055f9f2a4725c95afb29e"><div class="ttname"><a href="namespaceentt.html#a8c24ecc5ab0055f9f2a4725c95afb29e">entt::get</a></div><div class="ttdeci">constexpr get_t< Type... > get</div><div class="ttdoc">Variable template for lists of observed components.</div><div class="ttdef"><b>Definition:</b> <a href="entity_2utility_8hpp_source.html#l00040">utility.hpp:40</a></div></div>
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<div class="ttc" id="anamespaceentt_html_aef08fc4202f32f712bde26f55db463cb"><div class="ttname"><a href="namespaceentt.html#aef08fc4202f32f712bde26f55db463cb">entt::swap</a></div><div class="ttdeci">void swap(compressed_pair< First, Second > &lhs, compressed_pair< First, Second > &rhs)</div><div class="ttdoc">Swaps two compressed pair objects.</div><div class="ttdef"><b>Definition:</b> <a href="compressed__pair_8hpp_source.html#l00260">compressed_pair.hpp:260</a></div></div>
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