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<div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span>&#160;<span class="preprocessor">#ifndef ENTT_CORE_COMPRESSED_PAIR_HPP</span></div>
<div class="line"><a name="l00002"></a><span class="lineno"> 2</span>&#160;<span class="preprocessor">#define ENTT_CORE_COMPRESSED_PAIR_HPP</span></div>
<div class="line"><a name="l00003"></a><span class="lineno"> 3</span>&#160; </div>
<div class="line"><a name="l00004"></a><span class="lineno"> 4</span>&#160;<span class="preprocessor">#include &lt;cstddef&gt;</span></div>
<div class="line"><a name="l00005"></a><span class="lineno"> 5</span>&#160;<span class="preprocessor">#include &lt;tuple&gt;</span></div>
<div class="line"><a name="l00006"></a><span class="lineno"> 6</span>&#160;<span class="preprocessor">#include &lt;type_traits&gt;</span></div>
<div class="line"><a name="l00007"></a><span class="lineno"> 7</span>&#160;<span class="preprocessor">#include &lt;utility&gt;</span></div>
<div class="line"><a name="l00008"></a><span class="lineno"> 8</span>&#160;<span class="preprocessor">#include &quot;../config/config.h&quot;</span></div>
<div class="line"><a name="l00009"></a><span class="lineno"> 9</span>&#160;<span class="preprocessor">#include &quot;type_traits.hpp&quot;</span></div>
<div class="line"><a name="l00010"></a><span class="lineno"> 10</span>&#160; </div>
<div class="line"><a name="l00011"></a><span class="lineno"> 11</span>&#160;<span class="keyword">namespace </span><a class="code" href="namespaceentt.html">entt</a> {</div>
<div class="line"><a name="l00012"></a><span class="lineno"> 12</span>&#160; </div>
<div class="line"><a name="l00018"></a><span class="lineno"> 18</span>&#160;<span class="keyword">namespace </span>internal {</div>
<div class="line"><a name="l00019"></a><span class="lineno"> 19</span>&#160; </div>
<div class="line"><a name="l00020"></a><span class="lineno"> 20</span>&#160;<span class="keyword">template</span>&lt;<span class="keyword">typename</span> Type, std::<span class="keywordtype">size_t</span>, <span class="keyword">typename</span> = <span class="keywordtype">void</span>&gt;</div>
<div class="line"><a name="l00021"></a><span class="lineno"> 21</span>&#160;<span class="keyword">struct </span>compressed_pair_element {</div>
<div class="line"><a name="l00022"></a><span class="lineno"> 22</span>&#160; <span class="keyword">using</span> reference = Type &amp;;</div>
<div class="line"><a name="l00023"></a><span class="lineno"> 23</span>&#160; <span class="keyword">using</span> const_reference = <span class="keyword">const</span> Type &amp;;</div>
<div class="line"><a name="l00024"></a><span class="lineno"> 24</span>&#160; </div>
<div class="line"><a name="l00025"></a><span class="lineno"> 25</span>&#160; <span class="keyword">template</span>&lt;<span class="keywordtype">bool</span> Dummy = true, <span class="keyword">typename</span> = std::enable_if_t&lt;Dummy &amp;&amp; std::is_default_constructible_v&lt;Type&gt;&gt;&gt;</div>
<div class="line"><a name="l00026"></a><span class="lineno"> 26</span>&#160; compressed_pair_element()</div>
<div class="line"><a name="l00027"></a><span class="lineno"> 27</span>&#160; : value{} {}</div>
<div class="line"><a name="l00028"></a><span class="lineno"> 28</span>&#160; </div>
<div class="line"><a name="l00029"></a><span class="lineno"> 29</span>&#160; <span class="keyword">template</span>&lt;<span class="keyword">typename</span> Args, <span class="keyword">typename</span> = std::enable_if_t&lt;!std::is_same_v&lt;std::remove_cv_t&lt;std::remove_reference_t&lt;Args&gt;&gt;, compressed_pair_element&gt;&gt;&gt;</div>
<div class="line"><a name="l00030"></a><span class="lineno"> 30</span>&#160; compressed_pair_element(Args &amp;&amp;args)</div>
<div class="line"><a name="l00031"></a><span class="lineno"> 31</span>&#160; : value{std::forward&lt;Args&gt;(args)} {}</div>
<div class="line"><a name="l00032"></a><span class="lineno"> 32</span>&#160; </div>
<div class="line"><a name="l00033"></a><span class="lineno"> 33</span>&#160; <span class="keyword">template</span>&lt;<span class="keyword">typename</span>... Args, std::size_t... Index&gt;</div>
<div class="line"><a name="l00034"></a><span class="lineno"> 34</span>&#160; compressed_pair_element(std::tuple&lt;Args...&gt; args, std::index_sequence&lt;Index...&gt;)</div>
<div class="line"><a name="l00035"></a><span class="lineno"> 35</span>&#160; : value{std::forward&lt;Args&gt;(std::<a class="code" href="namespaceentt.html#a8c24ecc5ab0055f9f2a4725c95afb29e">get</a>&lt;Index&gt;(args))...} {}</div>
<div class="line"><a name="l00036"></a><span class="lineno"> 36</span>&#160; </div>
<div class="line"><a name="l00037"></a><span class="lineno"> 37</span>&#160; [[nodiscard]] reference <a class="code" href="namespaceentt.html#a8c24ecc5ab0055f9f2a4725c95afb29e">get</a>() ENTT_NOEXCEPT {</div>
<div class="line"><a name="l00038"></a><span class="lineno"> 38</span>&#160; <span class="keywordflow">return</span> value;</div>
<div class="line"><a name="l00039"></a><span class="lineno"> 39</span>&#160; }</div>
<div class="line"><a name="l00040"></a><span class="lineno"> 40</span>&#160; </div>
<div class="line"><a name="l00041"></a><span class="lineno"> 41</span>&#160; [[nodiscard]] const_reference <a class="code" href="namespaceentt.html#a8c24ecc5ab0055f9f2a4725c95afb29e">get</a>() const ENTT_NOEXCEPT {</div>
<div class="line"><a name="l00042"></a><span class="lineno"> 42</span>&#160; <span class="keywordflow">return</span> value;</div>
<div class="line"><a name="l00043"></a><span class="lineno"> 43</span>&#160; }</div>
<div class="line"><a name="l00044"></a><span class="lineno"> 44</span>&#160; </div>
<div class="line"><a name="l00045"></a><span class="lineno"> 45</span>&#160;<span class="keyword">private</span>:</div>
<div class="line"><a name="l00046"></a><span class="lineno"> 46</span>&#160; Type value;</div>
<div class="line"><a name="l00047"></a><span class="lineno"> 47</span>&#160;};</div>
<div class="line"><a name="l00048"></a><span class="lineno"> 48</span>&#160; </div>
<div class="line"><a name="l00049"></a><span class="lineno"> 49</span>&#160;<span class="keyword">template</span>&lt;<span class="keyword">typename</span> Type, std::<span class="keywordtype">size_t</span> Tag&gt;</div>
<div class="line"><a name="l00050"></a><span class="lineno"> 50</span>&#160;<span class="keyword">struct </span>compressed_pair_element&lt;Type, Tag, std::enable_if_t&lt;is_ebco_eligible_v&lt;Type&gt;&gt;&gt;: Type {</div>
<div class="line"><a name="l00051"></a><span class="lineno"> 51</span>&#160; <span class="keyword">using</span> reference = Type &amp;;</div>
<div class="line"><a name="l00052"></a><span class="lineno"> 52</span>&#160; <span class="keyword">using</span> const_reference = <span class="keyword">const</span> Type &amp;;</div>
<div class="line"><a name="l00053"></a><span class="lineno"> 53</span>&#160; <span class="keyword">using</span> base_type = Type;</div>
<div class="line"><a name="l00054"></a><span class="lineno"> 54</span>&#160; </div>
<div class="line"><a name="l00055"></a><span class="lineno"> 55</span>&#160; <span class="keyword">template</span>&lt;<span class="keywordtype">bool</span> Dummy = true, <span class="keyword">typename</span> = std::enable_if_t&lt;Dummy &amp;&amp; std::is_default_constructible_v&lt;base_type&gt;&gt;&gt;</div>
<div class="line"><a name="l00056"></a><span class="lineno"> 56</span>&#160; compressed_pair_element()</div>
<div class="line"><a name="l00057"></a><span class="lineno"> 57</span>&#160; : base_type{} {}</div>
<div class="line"><a name="l00058"></a><span class="lineno"> 58</span>&#160; </div>
<div class="line"><a name="l00059"></a><span class="lineno"> 59</span>&#160; <span class="keyword">template</span>&lt;<span class="keyword">typename</span> Args, <span class="keyword">typename</span> = std::enable_if_t&lt;!std::is_same_v&lt;std::remove_cv_t&lt;std::remove_reference_t&lt;Args&gt;&gt;, compressed_pair_element&gt;&gt;&gt;</div>
<div class="line"><a name="l00060"></a><span class="lineno"> 60</span>&#160; compressed_pair_element(Args &amp;&amp;args)</div>
<div class="line"><a name="l00061"></a><span class="lineno"> 61</span>&#160; : base_type{std::forward&lt;Args&gt;(args)} {}</div>
<div class="line"><a name="l00062"></a><span class="lineno"> 62</span>&#160; </div>
<div class="line"><a name="l00063"></a><span class="lineno"> 63</span>&#160; <span class="keyword">template</span>&lt;<span class="keyword">typename</span>... Args, std::size_t... Index&gt;</div>
<div class="line"><a name="l00064"></a><span class="lineno"> 64</span>&#160; compressed_pair_element(std::tuple&lt;Args...&gt; args, std::index_sequence&lt;Index...&gt;)</div>
<div class="line"><a name="l00065"></a><span class="lineno"> 65</span>&#160; : base_type{std::forward&lt;Args&gt;(std::<a class="code" href="namespaceentt.html#a8c24ecc5ab0055f9f2a4725c95afb29e">get</a>&lt;Index&gt;(args))...} {}</div>
<div class="line"><a name="l00066"></a><span class="lineno"> 66</span>&#160; </div>
<div class="line"><a name="l00067"></a><span class="lineno"> 67</span>&#160; [[nodiscard]] reference <a class="code" href="namespaceentt.html#a8c24ecc5ab0055f9f2a4725c95afb29e">get</a>() ENTT_NOEXCEPT {</div>
<div class="line"><a name="l00068"></a><span class="lineno"> 68</span>&#160; <span class="keywordflow">return</span> *<span class="keyword">this</span>;</div>
<div class="line"><a name="l00069"></a><span class="lineno"> 69</span>&#160; }</div>
<div class="line"><a name="l00070"></a><span class="lineno"> 70</span>&#160; </div>
<div class="line"><a name="l00071"></a><span class="lineno"> 71</span>&#160; [[nodiscard]] const_reference <a class="code" href="namespaceentt.html#a8c24ecc5ab0055f9f2a4725c95afb29e">get</a>() const ENTT_NOEXCEPT {</div>
<div class="line"><a name="l00072"></a><span class="lineno"> 72</span>&#160; <span class="keywordflow">return</span> *<span class="keyword">this</span>;</div>
<div class="line"><a name="l00073"></a><span class="lineno"> 73</span>&#160; }</div>
<div class="line"><a name="l00074"></a><span class="lineno"> 74</span>&#160;};</div>
<div class="line"><a name="l00075"></a><span class="lineno"> 75</span>&#160; </div>
<div class="line"><a name="l00076"></a><span class="lineno"> 76</span>&#160;} <span class="comment">// namespace internal</span></div>
<div class="line"><a name="l00077"></a><span class="lineno"> 77</span>&#160; </div>
<div class="line"><a name="l00092"></a><span class="lineno"> 92</span>&#160;<span class="keyword">template</span>&lt;<span class="keyword">typename</span> First, <span class="keyword">typename</span> Second&gt;</div>
<div class="line"><a name="l00093"></a><span class="lineno"><a class="line" href="classentt_1_1compressed__pair.html"> 93</a></span>&#160;<span class="keyword">class </span><a class="code" href="classentt_1_1compressed__pair.html">compressed_pair</a> final</div>
<div class="line"><a name="l00094"></a><span class="lineno"> 94</span>&#160; : internal::compressed_pair_element&lt;First, 0u&gt;,</div>
<div class="line"><a name="l00095"></a><span class="lineno"> 95</span>&#160; internal::compressed_pair_element&lt;Second, 1u&gt; {</div>
<div class="line"><a name="l00096"></a><span class="lineno"> 96</span>&#160; <span class="keyword">using</span> first_base = internal::compressed_pair_element&lt;First, 0u&gt;;</div>
<div class="line"><a name="l00097"></a><span class="lineno"> 97</span>&#160; <span class="keyword">using</span> second_base = internal::compressed_pair_element&lt;Second, 1u&gt;;</div>
<div class="line"><a name="l00098"></a><span class="lineno"> 98</span>&#160; </div>
<div class="line"><a name="l00099"></a><span class="lineno"> 99</span>&#160;<span class="keyword">public</span>:</div>
<div class="line"><a name="l00101"></a><span class="lineno"><a class="line" href="classentt_1_1compressed__pair.html#a6db727eef0bb9927d0d299f6a620005a"> 101</a></span>&#160; <span class="keyword">using</span> <a class="code" href="classentt_1_1compressed__pair.html#a6db727eef0bb9927d0d299f6a620005a">first_type</a> = First;</div>
<div class="line"><a name="l00103"></a><span class="lineno"><a class="line" href="classentt_1_1compressed__pair.html#aeadab3815d52ed579a96cde92f15eeb6"> 103</a></span>&#160; <span class="keyword">using</span> <a class="code" href="classentt_1_1compressed__pair.html#aeadab3815d52ed579a96cde92f15eeb6">second_type</a> = Second;</div>
<div class="line"><a name="l00104"></a><span class="lineno"> 104</span>&#160; </div>
<div class="line"><a name="l00113"></a><span class="lineno"> 113</span>&#160; <span class="keyword">template</span>&lt;<span class="keywordtype">bool</span> Dummy = true, <span class="keyword">typename</span> = std::enable_if_t&lt;Dummy &amp;&amp; std::is_default_constructible_v&lt;first_type&gt; &amp;&amp; std::is_default_constructible_v&lt;second_type&gt;&gt;&gt;</div>
<div class="line"><a name="l00114"></a><span class="lineno"><a class="line" href="classentt_1_1compressed__pair.html#ad232c3555664edad7dc1425672245054"> 114</a></span>&#160; constexpr <a class="code" href="classentt_1_1compressed__pair.html#ad232c3555664edad7dc1425672245054">compressed_pair</a>()</div>
<div class="line"><a name="l00115"></a><span class="lineno"> 115</span>&#160; : first_base{},</div>
<div class="line"><a name="l00116"></a><span class="lineno"> 116</span>&#160; second_base{} {}</div>
<div class="line"><a name="l00117"></a><span class="lineno"> 117</span>&#160; </div>
<div class="line"><a name="l00122"></a><span class="lineno"><a class="line" href="classentt_1_1compressed__pair.html#a2a25fcd5670e614428cbb8b929f02fca"> 122</a></span>&#160; 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> &amp;other) = <span class="keywordflow">default</span>;</div>
<div class="line"><a name="l00123"></a><span class="lineno"> 123</span>&#160; </div>
<div class="line"><a name="l00128"></a><span class="lineno"><a class="line" href="classentt_1_1compressed__pair.html#a91c6019fb88342859008675265a8d7d0"> 128</a></span>&#160; 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> &amp;&amp;other) = <span class="keywordflow">default</span>;</div>
<div class="line"><a name="l00129"></a><span class="lineno"> 129</span>&#160; </div>
<div class="line"><a name="l00137"></a><span class="lineno"> 137</span>&#160; <span class="keyword">template</span>&lt;<span class="keyword">typename</span> Arg, <span class="keyword">typename</span> Other&gt;</div>
<div class="line"><a name="l00138"></a><span class="lineno"><a class="line" href="classentt_1_1compressed__pair.html#a728283e0d45f7f13d762642a48a10e76"> 138</a></span>&#160; constexpr <a class="code" href="classentt_1_1compressed__pair.html#a728283e0d45f7f13d762642a48a10e76">compressed_pair</a>(Arg &amp;&amp;arg, Other &amp;&amp;other)</div>
<div class="line"><a name="l00139"></a><span class="lineno"> 139</span>&#160; : first_base{std::forward&lt;Arg&gt;(arg)},</div>
<div class="line"><a name="l00140"></a><span class="lineno"> 140</span>&#160; second_base{std::forward&lt;Other&gt;(other)} {}</div>
<div class="line"><a name="l00141"></a><span class="lineno"> 141</span>&#160; </div>
<div class="line"><a name="l00149"></a><span class="lineno"> 149</span>&#160; <span class="keyword">template</span>&lt;<span class="keyword">typename</span>... Args, <span class="keyword">typename</span>... Other&gt;</div>
<div class="line"><a name="l00150"></a><span class="lineno"><a class="line" href="classentt_1_1compressed__pair.html#aed863f3bd0bde61f52c9cce84e9ecaac"> 150</a></span>&#160; constexpr <a class="code" href="classentt_1_1compressed__pair.html#aed863f3bd0bde61f52c9cce84e9ecaac">compressed_pair</a>(std::piecewise_construct_t, std::tuple&lt;Args...&gt; args, std::tuple&lt;Other...&gt; other)</div>
<div class="line"><a name="l00151"></a><span class="lineno"> 151</span>&#160; : first_base{std::move(args), std::index_sequence_for&lt;Args...&gt;{}},</div>
<div class="line"><a name="l00152"></a><span class="lineno"> 152</span>&#160; second_base{std::move(other), std::index_sequence_for&lt;Other...&gt;{}} {}</div>
<div class="line"><a name="l00153"></a><span class="lineno"> 153</span>&#160; </div>
<div class="line"><a name="l00159"></a><span class="lineno"><a class="line" href="classentt_1_1compressed__pair.html#a73b4a959b934357bc41b8e9c53b47496"> 159</a></span>&#160; constexpr <a class="code" href="classentt_1_1compressed__pair.html">compressed_pair</a> &amp;<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> &amp;other) = <span class="keywordflow">default</span>;</div>
<div class="line"><a name="l00160"></a><span class="lineno"> 160</span>&#160; </div>
<div class="line"><a name="l00166"></a><span class="lineno"><a class="line" href="classentt_1_1compressed__pair.html#ad61f40edf314083598c0b0d76aa90fa1"> 166</a></span>&#160; constexpr <a class="code" href="classentt_1_1compressed__pair.html">compressed_pair</a> &amp;<a class="code" href="classentt_1_1compressed__pair.html#ad61f40edf314083598c0b0d76aa90fa1">operator=</a>(<a class="code" href="classentt_1_1compressed__pair.html">compressed_pair</a> &amp;&amp;other) = <span class="keywordflow">default</span>;</div>
<div class="line"><a name="l00167"></a><span class="lineno"> 167</span>&#160; </div>
<div class="line"><a name="l00172"></a><span class="lineno"><a class="line" href="classentt_1_1compressed__pair.html#a805ab68ef0b7776421ee4bf8e06110b8"> 172</a></span>&#160; [[nodiscard]] <a class="code" href="classentt_1_1compressed__pair.html#a6db727eef0bb9927d0d299f6a620005a">first_type</a> &amp;<a class="code" href="classentt_1_1compressed__pair.html#a805ab68ef0b7776421ee4bf8e06110b8">first</a>() ENTT_NOEXCEPT {</div>
<div class="line"><a name="l00173"></a><span class="lineno"> 173</span>&#160; <span class="keywordflow">return</span> <span class="keyword">static_cast&lt;</span>first_base &amp;<span class="keyword">&gt;</span>(*this).get();</div>
<div class="line"><a name="l00174"></a><span class="lineno"> 174</span>&#160; }</div>
<div class="line"><a name="l00175"></a><span class="lineno"> 175</span>&#160; </div>
<div class="line"><a name="l00177"></a><span class="lineno"><a class="line" href="classentt_1_1compressed__pair.html#ad1a1aa91e51aff649bbcf4110a3a42bc"> 177</a></span>&#160; [[nodiscard]] <span class="keyword">const</span> <a class="code" href="classentt_1_1compressed__pair.html#a6db727eef0bb9927d0d299f6a620005a">first_type</a> &amp;<a class="code" href="classentt_1_1compressed__pair.html#ad1a1aa91e51aff649bbcf4110a3a42bc">first</a>() const ENTT_NOEXCEPT {</div>
<div class="line"><a name="l00178"></a><span class="lineno"> 178</span>&#160; <span class="keywordflow">return</span> <span class="keyword">static_cast&lt;</span><span class="keyword">const </span>first_base &amp;<span class="keyword">&gt;</span>(*this).get();</div>
<div class="line"><a name="l00179"></a><span class="lineno"> 179</span>&#160; }</div>
<div class="line"><a name="l00180"></a><span class="lineno"> 180</span>&#160; </div>
<div class="line"><a name="l00185"></a><span class="lineno"><a class="line" href="classentt_1_1compressed__pair.html#a73cc7edd96358313d81fe92736467d3f"> 185</a></span>&#160; [[nodiscard]] <a class="code" href="classentt_1_1compressed__pair.html#aeadab3815d52ed579a96cde92f15eeb6">second_type</a> &amp;<a class="code" href="classentt_1_1compressed__pair.html#a73cc7edd96358313d81fe92736467d3f">second</a>() ENTT_NOEXCEPT {</div>
<div class="line"><a name="l00186"></a><span class="lineno"> 186</span>&#160; <span class="keywordflow">return</span> <span class="keyword">static_cast&lt;</span>second_base &amp;<span class="keyword">&gt;</span>(*this).get();</div>
<div class="line"><a name="l00187"></a><span class="lineno"> 187</span>&#160; }</div>
<div class="line"><a name="l00188"></a><span class="lineno"> 188</span>&#160; </div>
<div class="line"><a name="l00190"></a><span class="lineno"><a class="line" href="classentt_1_1compressed__pair.html#a68d93c20d07b5f9badaf100193e2df52"> 190</a></span>&#160; [[nodiscard]] <span class="keyword">const</span> <a class="code" href="classentt_1_1compressed__pair.html#aeadab3815d52ed579a96cde92f15eeb6">second_type</a> &amp;<a class="code" href="classentt_1_1compressed__pair.html#a68d93c20d07b5f9badaf100193e2df52">second</a>() const ENTT_NOEXCEPT {</div>
<div class="line"><a name="l00191"></a><span class="lineno"> 191</span>&#160; <span class="keywordflow">return</span> <span class="keyword">static_cast&lt;</span><span class="keyword">const </span>second_base &amp;<span class="keyword">&gt;</span>(*this).get();</div>
<div class="line"><a name="l00192"></a><span class="lineno"> 192</span>&#160; }</div>
<div class="line"><a name="l00193"></a><span class="lineno"> 193</span>&#160; </div>
<div class="line"><a name="l00198"></a><span class="lineno"><a class="line" href="classentt_1_1compressed__pair.html#a1f153123bcde4947f020ea2459d76e45"> 198</a></span>&#160; <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> &amp;other) {</div>
<div class="line"><a name="l00199"></a><span class="lineno"> 199</span>&#160; <span class="keyword">using</span> std::swap;</div>
<div class="line"><a name="l00200"></a><span class="lineno"> 200</span>&#160; <a class="code" href="namespaceentt.html#aef08fc4202f32f712bde26f55db463cb">swap</a>(first(), other.<a class="code" href="classentt_1_1compressed__pair.html#a805ab68ef0b7776421ee4bf8e06110b8">first</a>());</div>
<div class="line"><a name="l00201"></a><span class="lineno"> 201</span>&#160; <a class="code" href="namespaceentt.html#aef08fc4202f32f712bde26f55db463cb">swap</a>(second(), other.<a class="code" href="classentt_1_1compressed__pair.html#a73cc7edd96358313d81fe92736467d3f">second</a>());</div>
<div class="line"><a name="l00202"></a><span class="lineno"> 202</span>&#160; }</div>
<div class="line"><a name="l00203"></a><span class="lineno"> 203</span>&#160; </div>
<div class="line"><a name="l00210"></a><span class="lineno"> 210</span>&#160; <span class="keyword">template</span>&lt;std::<span class="keywordtype">size_t</span> Index&gt;</div>
<div class="line"><a name="l00211"></a><span class="lineno"><a class="line" href="classentt_1_1compressed__pair.html#a26925f0fdea3a43aab4bb53763a377af"> 211</a></span>&#160; decltype(<span class="keyword">auto</span>) <a class="code" href="namespaceentt.html#a8c24ecc5ab0055f9f2a4725c95afb29e">get</a>() ENTT_NOEXCEPT {</div>
<div class="line"><a name="l00212"></a><span class="lineno"> 212</span>&#160; <span class="keywordflow">if</span> constexpr(Index == 0u) {</div>
<div class="line"><a name="l00213"></a><span class="lineno"> 213</span>&#160; <span class="keywordflow">return</span> first();</div>
<div class="line"><a name="l00214"></a><span class="lineno"> 214</span>&#160; } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00215"></a><span class="lineno"> 215</span>&#160; static_assert(Index == 1u, <span class="stringliteral">&quot;Index out of bounds&quot;</span>);</div>
<div class="line"><a name="l00216"></a><span class="lineno"> 216</span>&#160; <span class="keywordflow">return</span> second();</div>
<div class="line"><a name="l00217"></a><span class="lineno"> 217</span>&#160; }</div>
<div class="line"><a name="l00218"></a><span class="lineno"> 218</span>&#160; }</div>
<div class="line"><a name="l00219"></a><span class="lineno"> 219</span>&#160; </div>
<div class="line"><a name="l00221"></a><span class="lineno"> 221</span>&#160; <span class="keyword">template</span>&lt;std::<span class="keywordtype">size_t</span> Index&gt;</div>
<div class="line"><a name="l00222"></a><span class="lineno"><a class="line" href="classentt_1_1compressed__pair.html#a74e585a52a150969030cf28867de1ca5"> 222</a></span>&#160; decltype(<span class="keyword">auto</span>) <a class="code" href="namespaceentt.html#a8c24ecc5ab0055f9f2a4725c95afb29e">get</a>() const ENTT_NOEXCEPT {</div>
<div class="line"><a name="l00223"></a><span class="lineno"> 223</span>&#160; <span class="keywordflow">if</span> constexpr(Index == 0u) {</div>
<div class="line"><a name="l00224"></a><span class="lineno"> 224</span>&#160; <span class="keywordflow">return</span> first();</div>
<div class="line"><a name="l00225"></a><span class="lineno"> 225</span>&#160; } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00226"></a><span class="lineno"> 226</span>&#160; static_assert(Index == 1u, <span class="stringliteral">&quot;Index out of bounds&quot;</span>);</div>
<div class="line"><a name="l00227"></a><span class="lineno"> 227</span>&#160; <span class="keywordflow">return</span> second();</div>
<div class="line"><a name="l00228"></a><span class="lineno"> 228</span>&#160; }</div>
<div class="line"><a name="l00229"></a><span class="lineno"> 229</span>&#160; }</div>
<div class="line"><a name="l00230"></a><span class="lineno"> 230</span>&#160;};</div>
<div class="line"><a name="l00231"></a><span class="lineno"> 231</span>&#160; </div>
<div class="line"><a name="l00237"></a><span class="lineno"> 237</span>&#160;<span class="keyword">template</span>&lt;<span class="keyword">typename</span> Type, <span class="keyword">typename</span> Other&gt;</div>
<div class="line"><a name="l00238"></a><span class="lineno"><a class="line" href="namespaceentt.html#af638f85aa855e8364af76d8bf93eee3b"> 238</a></span>&#160;<a class="code" href="classentt_1_1compressed__pair.html">compressed_pair</a>(Type &amp;&amp;, Other &amp;&amp;) -&gt; <a class="code" href="classentt_1_1compressed__pair.html">compressed_pair&lt;std::decay_t&lt;Type&gt;</a>, std::decay_t&lt;Other&gt;&gt;;</div>
<div class="line"><a name="l00239"></a><span class="lineno"> 239</span>&#160; </div>
<div class="line"><a name="l00247"></a><span class="lineno"> 247</span>&#160;<span class="keyword">template</span>&lt;<span class="keyword">typename</span> First, <span class="keyword">typename</span> Second&gt;</div>
<div class="line"><a name="l00248"></a><span class="lineno"><a class="line" href="namespaceentt.html#aef08fc4202f32f712bde26f55db463cb"> 248</a></span>&#160;<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&lt;First, Second&gt;</a> &amp;lhs, <a class="code" href="classentt_1_1compressed__pair.html">compressed_pair&lt;First, Second&gt;</a> &amp;rhs) {</div>
<div class="line"><a name="l00249"></a><span class="lineno"> 249</span>&#160; lhs.<a class="code" href="classentt_1_1compressed__pair.html#a1f153123bcde4947f020ea2459d76e45">swap</a>(rhs);</div>
<div class="line"><a name="l00250"></a><span class="lineno"> 250</span>&#160;}</div>
<div class="line"><a name="l00251"></a><span class="lineno"> 251</span>&#160; </div>
<div class="line"><a name="l00252"></a><span class="lineno"> 252</span>&#160;} <span class="comment">// namespace entt</span></div>
<div class="line"><a name="l00253"></a><span class="lineno"> 253</span>&#160; </div>
<div class="line"><a name="l00254"></a><span class="lineno"> 254</span>&#160;<span class="comment">// disable structured binding support for clang 6, it messes when specializing tuple_size</span></div>
<div class="line"><a name="l00255"></a><span class="lineno"> 255</span>&#160;<span class="preprocessor">#if !defined __clang_major__ || __clang_major__ &gt; 6</span></div>
<div class="line"><a name="l00256"></a><span class="lineno"> 256</span>&#160;<span class="keyword">namespace </span>std {</div>
<div class="line"><a name="l00257"></a><span class="lineno"> 257</span>&#160; </div>
<div class="line"><a name="l00263"></a><span class="lineno"> 263</span>&#160;<span class="keyword">template</span>&lt;<span class="keyword">typename</span> First, <span class="keyword">typename</span> Second&gt;</div>
<div class="line"><a name="l00264"></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"> 264</a></span>&#160;<span class="keyword">struct </span>tuple_size&lt;<a class="code" href="namespaceentt.html">entt</a>::compressed_pair&lt;First, Second&gt;&gt;: integral_constant&lt;size_t, 2u&gt; {};</div>
<div class="line"><a name="l00265"></a><span class="lineno"> 265</span>&#160; </div>
<div class="line"><a name="l00272"></a><span class="lineno"> 272</span>&#160;<span class="keyword">template</span>&lt;<span class="keywordtype">size_t</span> Index, <span class="keyword">typename</span> First, <span class="keyword">typename</span> Second&gt;</div>
<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>&#160;<span class="keyword">struct </span>tuple_element&lt;Index, <a class="code" href="namespaceentt.html">entt</a>::compressed_pair&lt;First, Second&gt;&gt;: conditional&lt;Index == 0u, First, Second&gt; {</div>
<div class="line"><a name="l00274"></a><span class="lineno"> 274</span>&#160; static_assert(Index &lt; 2u, <span class="stringliteral">&quot;Index out of bounds&quot;</span>);</div>
<div class="line"><a name="l00275"></a><span class="lineno"> 275</span>&#160;};</div>
<div class="line"><a name="l00276"></a><span class="lineno"> 276</span>&#160; </div>
<div class="line"><a name="l00277"></a><span class="lineno"> 277</span>&#160;} <span class="comment">// namespace std</span></div>
<div class="line"><a name="l00278"></a><span class="lineno"> 278</span>&#160;<span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00279"></a><span class="lineno"> 279</span>&#160; </div>
<div class="line"><a name="l00280"></a><span class="lineno"> 280</span>&#160;<span class="preprocessor">#endif</span></div>
<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#l00093">compressed_pair.hpp:95</a></div></div>
<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 &amp;other)</div><div class="ttdoc">Swaps two compressed pair objects.</div><div class="ttdef"><b>Definition:</b> <a href="compressed__pair_8hpp_source.html#l00198">compressed_pair.hpp:198</a></div></div>
<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 &amp;other)=default</div><div class="ttdoc">Copy constructor.</div></div>
<div class="ttc" id="aclassentt_1_1compressed__pair_html_a68d93c20d07b5f9badaf100193e2df52"><div class="ttname"><a href="classentt_1_1compressed__pair.html#a68d93c20d07b5f9badaf100193e2df52">entt::compressed_pair::second</a></div><div class="ttdeci">const second_type &amp; 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#l00190">compressed_pair.hpp:190</a></div></div>
<div class="ttc" id="aclassentt_1_1compressed__pair_html_a6db727eef0bb9927d0d299f6a620005a"><div class="ttname"><a href="classentt_1_1compressed__pair.html#a6db727eef0bb9927d0d299f6a620005a">entt::compressed_pair::first_type</a></div><div class="ttdeci">First first_type</div><div class="ttdoc">The type of the first element that the pair stores.</div><div class="ttdef"><b>Definition:</b> <a href="compressed__pair_8hpp_source.html#l00101">compressed_pair.hpp:101</a></div></div>
<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 &amp;&amp;arg, Other &amp;&amp;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#l00138">compressed_pair.hpp:138</a></div></div>
<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 &amp; operator=(const compressed_pair &amp;other)=default</div><div class="ttdoc">Copy assignment operator.</div></div>
<div class="ttc" id="aclassentt_1_1compressed__pair_html_a73cc7edd96358313d81fe92736467d3f"><div class="ttname"><a href="classentt_1_1compressed__pair.html#a73cc7edd96358313d81fe92736467d3f">entt::compressed_pair::second</a></div><div class="ttdeci">second_type &amp; 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#l00185">compressed_pair.hpp:185</a></div></div>
<div class="ttc" id="aclassentt_1_1compressed__pair_html_a805ab68ef0b7776421ee4bf8e06110b8"><div class="ttname"><a href="classentt_1_1compressed__pair.html#a805ab68ef0b7776421ee4bf8e06110b8">entt::compressed_pair::first</a></div><div class="ttdeci">first_type &amp; 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#l00172">compressed_pair.hpp:172</a></div></div>
<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 &amp;&amp;other)=default</div><div class="ttdoc">Move constructor.</div></div>
<div class="ttc" id="aclassentt_1_1compressed__pair_html_ad1a1aa91e51aff649bbcf4110a3a42bc"><div class="ttname"><a href="classentt_1_1compressed__pair.html#ad1a1aa91e51aff649bbcf4110a3a42bc">entt::compressed_pair::first</a></div><div class="ttdeci">const first_type &amp; 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#l00177">compressed_pair.hpp:177</a></div></div>
<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#l00114">compressed_pair.hpp:114</a></div></div>
<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 &amp; operator=(compressed_pair &amp;&amp;other)=default</div><div class="ttdoc">Move assignment operator.</div></div>
<div class="ttc" id="aclassentt_1_1compressed__pair_html_aeadab3815d52ed579a96cde92f15eeb6"><div class="ttname"><a href="classentt_1_1compressed__pair.html#aeadab3815d52ed579a96cde92f15eeb6">entt::compressed_pair::second_type</a></div><div class="ttdeci">Second second_type</div><div class="ttdoc">The type of the second element that the pair stores.</div><div class="ttdef"><b>Definition:</b> <a href="compressed__pair_8hpp_source.html#l00103">compressed_pair.hpp:103</a></div></div>
<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&lt; Args... &gt; args, std::tuple&lt; Other... &gt; 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#l00150">compressed_pair.hpp:150</a></div></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_a8c24ecc5ab0055f9f2a4725c95afb29e"><div class="ttname"><a href="namespaceentt.html#a8c24ecc5ab0055f9f2a4725c95afb29e">entt::get</a></div><div class="ttdeci">constexpr get_t&lt; Type... &gt; 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#l00034">utility.hpp:34</a></div></div>
<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&lt; First, Second &gt; &amp;lhs, compressed_pair&lt; First, Second &gt; &amp;rhs)</div><div class="ttdoc">Swaps two compressed pair objects.</div><div class="ttdef"><b>Definition:</b> <a href="compressed__pair_8hpp_source.html#l00248">compressed_pair.hpp:248</a></div></div>
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