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<title>LCOV - coverage.info - usr/include/c++/13/tuple</title>
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<td width="10%" class="headerValue"><a href="../../../../index.html">top level</a> - <a href="index.html">/usr/include/c++/13</a> - tuple<span style="font-size: 80%;"> (source / <a href="tuple.func-c.html">functions</a>)</span></td>
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<td width="5%" class="headerCovTableHead">Coverage</td>
<td width="5%" class="headerCovTableHead" title="Covered + Uncovered code">Total</td>
<td width="5%" class="headerCovTableHead" title="Exercised code only">Hit</td>
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<td class="headerItem">Test:</td>
<td class="headerValue">coverage.info</td>
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<td class="headerItem">Lines:</td>
<td class="headerCovTableEntryHi">92.0&nbsp;%</td>
<td class="headerCovTableEntry">88</td>
<td class="headerCovTableEntry">81</td>
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<td class="headerItem">Test Date:</td>
<td class="headerValue">2024-04-30 13:17:26</td>
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<td class="headerItem">Functions:</td>
<td class="headerCovTableEntryLo">61.0&nbsp;%</td>
<td class="headerCovTableEntry">607</td>
<td class="headerCovTableEntry">370</td>
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<pre class="sourceHeading"> Line data Source code</pre>
<pre class="source">
<span id="L1"><span class="lineNum"> 1</span> : // &lt;tuple&gt; -*- C++ -*-</span>
<span id="L2"><span class="lineNum"> 2</span> : </span>
<span id="L3"><span class="lineNum"> 3</span> : // Copyright (C) 2007-2023 Free Software Foundation, Inc.</span>
<span id="L4"><span class="lineNum"> 4</span> : //</span>
<span id="L5"><span class="lineNum"> 5</span> : // This file is part of the GNU ISO C++ Library. This library is free</span>
<span id="L6"><span class="lineNum"> 6</span> : // software; you can redistribute it and/or modify it under the</span>
<span id="L7"><span class="lineNum"> 7</span> : // terms of the GNU General Public License as published by the</span>
<span id="L8"><span class="lineNum"> 8</span> : // Free Software Foundation; either version 3, or (at your option)</span>
<span id="L9"><span class="lineNum"> 9</span> : // any later version.</span>
<span id="L10"><span class="lineNum"> 10</span> : </span>
<span id="L11"><span class="lineNum"> 11</span> : // This library is distributed in the hope that it will be useful,</span>
<span id="L12"><span class="lineNum"> 12</span> : // but WITHOUT ANY WARRANTY; without even the implied warranty of</span>
<span id="L13"><span class="lineNum"> 13</span> : // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the</span>
<span id="L14"><span class="lineNum"> 14</span> : // GNU General Public License for more details.</span>
<span id="L15"><span class="lineNum"> 15</span> : </span>
<span id="L16"><span class="lineNum"> 16</span> : // Under Section 7 of GPL version 3, you are granted additional</span>
<span id="L17"><span class="lineNum"> 17</span> : // permissions described in the GCC Runtime Library Exception, version</span>
<span id="L18"><span class="lineNum"> 18</span> : // 3.1, as published by the Free Software Foundation.</span>
<span id="L19"><span class="lineNum"> 19</span> : </span>
<span id="L20"><span class="lineNum"> 20</span> : // You should have received a copy of the GNU General Public License and</span>
<span id="L21"><span class="lineNum"> 21</span> : // a copy of the GCC Runtime Library Exception along with this program;</span>
<span id="L22"><span class="lineNum"> 22</span> : // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see</span>
<span id="L23"><span class="lineNum"> 23</span> : // &lt;http://www.gnu.org/licenses/&gt;.</span>
<span id="L24"><span class="lineNum"> 24</span> : </span>
<span id="L25"><span class="lineNum"> 25</span> : /** @file include/tuple</span>
<span id="L26"><span class="lineNum"> 26</span> : * This is a Standard C++ Library header.</span>
<span id="L27"><span class="lineNum"> 27</span> : */</span>
<span id="L28"><span class="lineNum"> 28</span> : </span>
<span id="L29"><span class="lineNum"> 29</span> : #ifndef _GLIBCXX_TUPLE</span>
<span id="L30"><span class="lineNum"> 30</span> : #define _GLIBCXX_TUPLE 1</span>
<span id="L31"><span class="lineNum"> 31</span> : </span>
<span id="L32"><span class="lineNum"> 32</span> : #pragma GCC system_header</span>
<span id="L33"><span class="lineNum"> 33</span> : </span>
<span id="L34"><span class="lineNum"> 34</span> : #if __cplusplus &lt; 201103L</span>
<span id="L35"><span class="lineNum"> 35</span> : # include &lt;bits/c++0x_warning.h&gt;</span>
<span id="L36"><span class="lineNum"> 36</span> : #else</span>
<span id="L37"><span class="lineNum"> 37</span> : </span>
<span id="L38"><span class="lineNum"> 38</span> : #include &lt;bits/stl_pair.h&gt; // for std::pair</span>
<span id="L39"><span class="lineNum"> 39</span> : #include &lt;bits/uses_allocator.h&gt; // for std::allocator_arg_t</span>
<span id="L40"><span class="lineNum"> 40</span> : #include &lt;bits/utility.h&gt; // for std::tuple_size etc.</span>
<span id="L41"><span class="lineNum"> 41</span> : #include &lt;bits/invoke.h&gt; // for std::__invoke</span>
<span id="L42"><span class="lineNum"> 42</span> : #if __cplusplus &gt; 201703L</span>
<span id="L43"><span class="lineNum"> 43</span> : # include &lt;compare&gt;</span>
<span id="L44"><span class="lineNum"> 44</span> : # include &lt;bits/ranges_util.h&gt; // for std::ranges::subrange</span>
<span id="L45"><span class="lineNum"> 45</span> : # define __cpp_lib_constexpr_tuple 201811L</span>
<span id="L46"><span class="lineNum"> 46</span> : #endif</span>
<span id="L47"><span class="lineNum"> 47</span> : </span>
<span id="L48"><span class="lineNum"> 48</span> : namespace std _GLIBCXX_VISIBILITY(default)</span>
<span id="L49"><span class="lineNum"> 49</span> : {</span>
<span id="L50"><span class="lineNum"> 50</span> : _GLIBCXX_BEGIN_NAMESPACE_VERSION</span>
<span id="L51"><span class="lineNum"> 51</span> : </span>
<span id="L52"><span class="lineNum"> 52</span> : /**</span>
<span id="L53"><span class="lineNum"> 53</span> : * @addtogroup utilities</span>
<span id="L54"><span class="lineNum"> 54</span> : * @{</span>
<span id="L55"><span class="lineNum"> 55</span> : */</span>
<span id="L56"><span class="lineNum"> 56</span> : </span>
<span id="L57"><span class="lineNum"> 57</span> : template&lt;typename... _Elements&gt;</span>
<span id="L58"><span class="lineNum"> 58</span> : class tuple;</span>
<span id="L59"><span class="lineNum"> 59</span> : </span>
<span id="L60"><span class="lineNum"> 60</span> : template&lt;typename _Tp&gt;</span>
<span id="L61"><span class="lineNum"> 61</span> : struct __is_empty_non_tuple : is_empty&lt;_Tp&gt; { };</span>
<span id="L62"><span class="lineNum"> 62</span> : </span>
<span id="L63"><span class="lineNum"> 63</span> : // Using EBO for elements that are tuples causes ambiguous base errors.</span>
<span id="L64"><span class="lineNum"> 64</span> : template&lt;typename _El0, typename... _El&gt;</span>
<span id="L65"><span class="lineNum"> 65</span> : struct __is_empty_non_tuple&lt;tuple&lt;_El0, _El...&gt;&gt; : false_type { };</span>
<span id="L66"><span class="lineNum"> 66</span> : </span>
<span id="L67"><span class="lineNum"> 67</span> : // Use the Empty Base-class Optimization for empty, non-final types.</span>
<span id="L68"><span class="lineNum"> 68</span> : template&lt;typename _Tp&gt;</span>
<span id="L69"><span class="lineNum"> 69</span> : using __empty_not_final</span>
<span id="L70"><span class="lineNum"> 70</span> : = __conditional_t&lt;__is_final(_Tp), false_type,</span>
<span id="L71"><span class="lineNum"> 71</span> : __is_empty_non_tuple&lt;_Tp&gt;&gt;;</span>
<span id="L72"><span class="lineNum"> 72</span> : </span>
<span id="L73"><span class="lineNum"> 73</span> : template&lt;size_t _Idx, typename _Head,</span>
<span id="L74"><span class="lineNum"> 74</span> : bool = __empty_not_final&lt;_Head&gt;::value&gt;</span>
<span id="L75"><span class="lineNum"> 75</span> : struct _Head_base;</span>
<span id="L76"><span class="lineNum"> 76</span> : </span>
<span id="L77"><span class="lineNum"> 77</span> : #if __has_cpp_attribute(__no_unique_address__)</span>
<span id="L78"><span class="lineNum"> 78</span> : template&lt;size_t _Idx, typename _Head&gt;</span>
<span id="L79"><span class="lineNum"> 79</span> : struct _Head_base&lt;_Idx, _Head, true&gt;</span>
<span id="L80"><span class="lineNum"> 80</span> : {</span>
<span id="L81"><span class="lineNum"> 81</span> <span class="tlaGNC tlaBgGNC"> 2051824 : constexpr _Head_base()</span></span>
<span id="L82"><span class="lineNum"> 82</span> <span class="tlaGNC"> 2051824 : : _M_head_impl() { }</span></span>
<span id="L83"><span class="lineNum"> 83</span> : </span>
<span id="L84"><span class="lineNum"> 84</span> : constexpr _Head_base(const _Head&amp; __h)</span>
<span id="L85"><span class="lineNum"> 85</span> : : _M_head_impl(__h) { }</span>
<span id="L86"><span class="lineNum"> 86</span> : </span>
<span id="L87"><span class="lineNum"> 87</span> : constexpr _Head_base(const _Head_base&amp;) = default;</span>
<span id="L88"><span class="lineNum"> 88</span> : constexpr _Head_base(_Head_base&amp;&amp;) = default;</span>
<span id="L89"><span class="lineNum"> 89</span> : </span>
<span id="L90"><span class="lineNum"> 90</span> : template&lt;typename _UHead&gt;</span>
<span id="L91"><span class="lineNum"> 91</span> <span class="tlaGNC"> 198 : constexpr _Head_base(_UHead&amp;&amp; __h)</span></span>
<span id="L92"><span class="lineNum"> 92</span> <span class="tlaGNC"> 198 : : _M_head_impl(std::forward&lt;_UHead&gt;(__h)) { }</span></span>
<span id="L93"><span class="lineNum"> 93</span> : </span>
<span id="L94"><span class="lineNum"> 94</span> : _GLIBCXX20_CONSTEXPR</span>
<span id="L95"><span class="lineNum"> 95</span> : _Head_base(allocator_arg_t, __uses_alloc0)</span>
<span id="L96"><span class="lineNum"> 96</span> : : _M_head_impl() { }</span>
<span id="L97"><span class="lineNum"> 97</span> : </span>
<span id="L98"><span class="lineNum"> 98</span> : template&lt;typename _Alloc&gt;</span>
<span id="L99"><span class="lineNum"> 99</span> : _GLIBCXX20_CONSTEXPR</span>
<span id="L100"><span class="lineNum"> 100</span> : _Head_base(allocator_arg_t, __uses_alloc1&lt;_Alloc&gt; __a)</span>
<span id="L101"><span class="lineNum"> 101</span> : : _M_head_impl(allocator_arg, *__a._M_a) { }</span>
<span id="L102"><span class="lineNum"> 102</span> : </span>
<span id="L103"><span class="lineNum"> 103</span> : template&lt;typename _Alloc&gt;</span>
<span id="L104"><span class="lineNum"> 104</span> : _GLIBCXX20_CONSTEXPR</span>
<span id="L105"><span class="lineNum"> 105</span> : _Head_base(allocator_arg_t, __uses_alloc2&lt;_Alloc&gt; __a)</span>
<span id="L106"><span class="lineNum"> 106</span> : : _M_head_impl(*__a._M_a) { }</span>
<span id="L107"><span class="lineNum"> 107</span> : </span>
<span id="L108"><span class="lineNum"> 108</span> : template&lt;typename _UHead&gt;</span>
<span id="L109"><span class="lineNum"> 109</span> : _GLIBCXX20_CONSTEXPR</span>
<span id="L110"><span class="lineNum"> 110</span> : _Head_base(__uses_alloc0, _UHead&amp;&amp; __uhead)</span>
<span id="L111"><span class="lineNum"> 111</span> : : _M_head_impl(std::forward&lt;_UHead&gt;(__uhead)) { }</span>
<span id="L112"><span class="lineNum"> 112</span> : </span>
<span id="L113"><span class="lineNum"> 113</span> : template&lt;typename _Alloc, typename _UHead&gt;</span>
<span id="L114"><span class="lineNum"> 114</span> : _GLIBCXX20_CONSTEXPR</span>
<span id="L115"><span class="lineNum"> 115</span> : _Head_base(__uses_alloc1&lt;_Alloc&gt; __a, _UHead&amp;&amp; __uhead)</span>
<span id="L116"><span class="lineNum"> 116</span> : : _M_head_impl(allocator_arg, *__a._M_a, std::forward&lt;_UHead&gt;(__uhead))</span>
<span id="L117"><span class="lineNum"> 117</span> : { }</span>
<span id="L118"><span class="lineNum"> 118</span> : </span>
<span id="L119"><span class="lineNum"> 119</span> : template&lt;typename _Alloc, typename _UHead&gt;</span>
<span id="L120"><span class="lineNum"> 120</span> : _GLIBCXX20_CONSTEXPR</span>
<span id="L121"><span class="lineNum"> 121</span> : _Head_base(__uses_alloc2&lt;_Alloc&gt; __a, _UHead&amp;&amp; __uhead)</span>
<span id="L122"><span class="lineNum"> 122</span> : : _M_head_impl(std::forward&lt;_UHead&gt;(__uhead), *__a._M_a) { }</span>
<span id="L123"><span class="lineNum"> 123</span> : </span>
<span id="L124"><span class="lineNum"> 124</span> : static constexpr _Head&amp;</span>
<span id="L125"><span class="lineNum"> 125</span> <span class="tlaGNC"> 43464 : _M_head(_Head_base&amp; __b) noexcept { return __b._M_head_impl; }</span></span>
<span id="L126"><span class="lineNum"> 126</span> : </span>
<span id="L127"><span class="lineNum"> 127</span> : static constexpr const _Head&amp;</span>
<span id="L128"><span class="lineNum"> 128</span> : _M_head(const _Head_base&amp; __b) noexcept { return __b._M_head_impl; }</span>
<span id="L129"><span class="lineNum"> 129</span> : </span>
<span id="L130"><span class="lineNum"> 130</span> : [[__no_unique_address__]] _Head _M_head_impl;</span>
<span id="L131"><span class="lineNum"> 131</span> : };</span>
<span id="L132"><span class="lineNum"> 132</span> : #else</span>
<span id="L133"><span class="lineNum"> 133</span> : template&lt;size_t _Idx, typename _Head&gt;</span>
<span id="L134"><span class="lineNum"> 134</span> : struct _Head_base&lt;_Idx, _Head, true&gt;</span>
<span id="L135"><span class="lineNum"> 135</span> : : public _Head</span>
<span id="L136"><span class="lineNum"> 136</span> : {</span>
<span id="L137"><span class="lineNum"> 137</span> : constexpr _Head_base()</span>
<span id="L138"><span class="lineNum"> 138</span> : : _Head() { }</span>
<span id="L139"><span class="lineNum"> 139</span> : </span>
<span id="L140"><span class="lineNum"> 140</span> : constexpr _Head_base(const _Head&amp; __h)</span>
<span id="L141"><span class="lineNum"> 141</span> : : _Head(__h) { }</span>
<span id="L142"><span class="lineNum"> 142</span> : </span>
<span id="L143"><span class="lineNum"> 143</span> : constexpr _Head_base(const _Head_base&amp;) = default;</span>
<span id="L144"><span class="lineNum"> 144</span> : constexpr _Head_base(_Head_base&amp;&amp;) = default;</span>
<span id="L145"><span class="lineNum"> 145</span> : </span>
<span id="L146"><span class="lineNum"> 146</span> : template&lt;typename _UHead&gt;</span>
<span id="L147"><span class="lineNum"> 147</span> : constexpr _Head_base(_UHead&amp;&amp; __h)</span>
<span id="L148"><span class="lineNum"> 148</span> : : _Head(std::forward&lt;_UHead&gt;(__h)) { }</span>
<span id="L149"><span class="lineNum"> 149</span> : </span>
<span id="L150"><span class="lineNum"> 150</span> : _GLIBCXX20_CONSTEXPR</span>
<span id="L151"><span class="lineNum"> 151</span> : _Head_base(allocator_arg_t, __uses_alloc0)</span>
<span id="L152"><span class="lineNum"> 152</span> : : _Head() { }</span>
<span id="L153"><span class="lineNum"> 153</span> : </span>
<span id="L154"><span class="lineNum"> 154</span> : template&lt;typename _Alloc&gt;</span>
<span id="L155"><span class="lineNum"> 155</span> : _GLIBCXX20_CONSTEXPR</span>
<span id="L156"><span class="lineNum"> 156</span> : _Head_base(allocator_arg_t, __uses_alloc1&lt;_Alloc&gt; __a)</span>
<span id="L157"><span class="lineNum"> 157</span> : : _Head(allocator_arg, *__a._M_a) { }</span>
<span id="L158"><span class="lineNum"> 158</span> : </span>
<span id="L159"><span class="lineNum"> 159</span> : template&lt;typename _Alloc&gt;</span>
<span id="L160"><span class="lineNum"> 160</span> : _GLIBCXX20_CONSTEXPR</span>
<span id="L161"><span class="lineNum"> 161</span> : _Head_base(allocator_arg_t, __uses_alloc2&lt;_Alloc&gt; __a)</span>
<span id="L162"><span class="lineNum"> 162</span> : : _Head(*__a._M_a) { }</span>
<span id="L163"><span class="lineNum"> 163</span> : </span>
<span id="L164"><span class="lineNum"> 164</span> : template&lt;typename _UHead&gt;</span>
<span id="L165"><span class="lineNum"> 165</span> : _GLIBCXX20_CONSTEXPR</span>
<span id="L166"><span class="lineNum"> 166</span> : _Head_base(__uses_alloc0, _UHead&amp;&amp; __uhead)</span>
<span id="L167"><span class="lineNum"> 167</span> : : _Head(std::forward&lt;_UHead&gt;(__uhead)) { }</span>
<span id="L168"><span class="lineNum"> 168</span> : </span>
<span id="L169"><span class="lineNum"> 169</span> : template&lt;typename _Alloc, typename _UHead&gt;</span>
<span id="L170"><span class="lineNum"> 170</span> : _GLIBCXX20_CONSTEXPR</span>
<span id="L171"><span class="lineNum"> 171</span> : _Head_base(__uses_alloc1&lt;_Alloc&gt; __a, _UHead&amp;&amp; __uhead)</span>
<span id="L172"><span class="lineNum"> 172</span> : : _Head(allocator_arg, *__a._M_a, std::forward&lt;_UHead&gt;(__uhead)) { }</span>
<span id="L173"><span class="lineNum"> 173</span> : </span>
<span id="L174"><span class="lineNum"> 174</span> : template&lt;typename _Alloc, typename _UHead&gt;</span>
<span id="L175"><span class="lineNum"> 175</span> : _GLIBCXX20_CONSTEXPR</span>
<span id="L176"><span class="lineNum"> 176</span> : _Head_base(__uses_alloc2&lt;_Alloc&gt; __a, _UHead&amp;&amp; __uhead)</span>
<span id="L177"><span class="lineNum"> 177</span> : : _Head(std::forward&lt;_UHead&gt;(__uhead), *__a._M_a) { }</span>
<span id="L178"><span class="lineNum"> 178</span> : </span>
<span id="L179"><span class="lineNum"> 179</span> : static constexpr _Head&amp;</span>
<span id="L180"><span class="lineNum"> 180</span> : _M_head(_Head_base&amp; __b) noexcept { return __b; }</span>
<span id="L181"><span class="lineNum"> 181</span> : </span>
<span id="L182"><span class="lineNum"> 182</span> : static constexpr const _Head&amp;</span>
<span id="L183"><span class="lineNum"> 183</span> : _M_head(const _Head_base&amp; __b) noexcept { return __b; }</span>
<span id="L184"><span class="lineNum"> 184</span> : };</span>
<span id="L185"><span class="lineNum"> 185</span> : #endif</span>
<span id="L186"><span class="lineNum"> 186</span> : </span>
<span id="L187"><span class="lineNum"> 187</span> : template&lt;size_t _Idx, typename _Head&gt;</span>
<span id="L188"><span class="lineNum"> 188</span> : struct _Head_base&lt;_Idx, _Head, false&gt;</span>
<span id="L189"><span class="lineNum"> 189</span> : {</span>
<span id="L190"><span class="lineNum"> 190</span> <span class="tlaGNC"> 2051824 : constexpr _Head_base()</span></span>
<span id="L191"><span class="lineNum"> 191</span> <span class="tlaGNC"> 2051824 : : _M_head_impl() { }</span></span>
<span id="L192"><span class="lineNum"> 192</span> : </span>
<span id="L193"><span class="lineNum"> 193</span> <span class="tlaGNC"> 8758190 : constexpr _Head_base(const _Head&amp; __h)</span></span>
<span id="L194"><span class="lineNum"> 194</span> <span class="tlaGNC"> 8758190 : : _M_head_impl(__h) { }</span></span>
<span id="L195"><span class="lineNum"> 195</span> : </span>
<span id="L196"><span class="lineNum"> 196</span> : constexpr _Head_base(const _Head_base&amp;) = default;</span>
<span id="L197"><span class="lineNum"> 197</span> : constexpr _Head_base(_Head_base&amp;&amp;) = default;</span>
<span id="L198"><span class="lineNum"> 198</span> : </span>
<span id="L199"><span class="lineNum"> 199</span> : template&lt;typename _UHead&gt;</span>
<span id="L200"><span class="lineNum"> 200</span> <span class="tlaGNC"> 4736306 : constexpr _Head_base(_UHead&amp;&amp; __h)</span></span>
<span id="L201"><span class="lineNum"> 201</span> <span class="tlaGNC"> 4736306 : : _M_head_impl(std::forward&lt;_UHead&gt;(__h)) { }</span></span>
<span id="L202"><span class="lineNum"> 202</span> : </span>
<span id="L203"><span class="lineNum"> 203</span> : _GLIBCXX20_CONSTEXPR</span>
<span id="L204"><span class="lineNum"> 204</span> : _Head_base(allocator_arg_t, __uses_alloc0)</span>
<span id="L205"><span class="lineNum"> 205</span> : : _M_head_impl() { }</span>
<span id="L206"><span class="lineNum"> 206</span> : </span>
<span id="L207"><span class="lineNum"> 207</span> : template&lt;typename _Alloc&gt;</span>
<span id="L208"><span class="lineNum"> 208</span> : _GLIBCXX20_CONSTEXPR</span>
<span id="L209"><span class="lineNum"> 209</span> : _Head_base(allocator_arg_t, __uses_alloc1&lt;_Alloc&gt; __a)</span>
<span id="L210"><span class="lineNum"> 210</span> : : _M_head_impl(allocator_arg, *__a._M_a) { }</span>
<span id="L211"><span class="lineNum"> 211</span> : </span>
<span id="L212"><span class="lineNum"> 212</span> : template&lt;typename _Alloc&gt;</span>
<span id="L213"><span class="lineNum"> 213</span> : _GLIBCXX20_CONSTEXPR</span>
<span id="L214"><span class="lineNum"> 214</span> : _Head_base(allocator_arg_t, __uses_alloc2&lt;_Alloc&gt; __a)</span>
<span id="L215"><span class="lineNum"> 215</span> : : _M_head_impl(*__a._M_a) { }</span>
<span id="L216"><span class="lineNum"> 216</span> : </span>
<span id="L217"><span class="lineNum"> 217</span> : template&lt;typename _UHead&gt;</span>
<span id="L218"><span class="lineNum"> 218</span> : _GLIBCXX20_CONSTEXPR</span>
<span id="L219"><span class="lineNum"> 219</span> : _Head_base(__uses_alloc0, _UHead&amp;&amp; __uhead)</span>
<span id="L220"><span class="lineNum"> 220</span> : : _M_head_impl(std::forward&lt;_UHead&gt;(__uhead)) { }</span>
<span id="L221"><span class="lineNum"> 221</span> : </span>
<span id="L222"><span class="lineNum"> 222</span> : template&lt;typename _Alloc, typename _UHead&gt;</span>
<span id="L223"><span class="lineNum"> 223</span> : _GLIBCXX20_CONSTEXPR</span>
<span id="L224"><span class="lineNum"> 224</span> : _Head_base(__uses_alloc1&lt;_Alloc&gt; __a, _UHead&amp;&amp; __uhead)</span>
<span id="L225"><span class="lineNum"> 225</span> : : _M_head_impl(allocator_arg, *__a._M_a, std::forward&lt;_UHead&gt;(__uhead))</span>
<span id="L226"><span class="lineNum"> 226</span> : { }</span>
<span id="L227"><span class="lineNum"> 227</span> : </span>
<span id="L228"><span class="lineNum"> 228</span> : template&lt;typename _Alloc, typename _UHead&gt;</span>
<span id="L229"><span class="lineNum"> 229</span> : _GLIBCXX20_CONSTEXPR</span>
<span id="L230"><span class="lineNum"> 230</span> : _Head_base(__uses_alloc2&lt;_Alloc&gt; __a, _UHead&amp;&amp; __uhead)</span>
<span id="L231"><span class="lineNum"> 231</span> : : _M_head_impl(std::forward&lt;_UHead&gt;(__uhead), *__a._M_a) { }</span>
<span id="L232"><span class="lineNum"> 232</span> : </span>
<span id="L233"><span class="lineNum"> 233</span> : static constexpr _Head&amp;</span>
<span id="L234"><span class="lineNum"> 234</span> <span class="tlaGNC"> 17228284 : _M_head(_Head_base&amp; __b) noexcept { return __b._M_head_impl; }</span></span>
<span id="L235"><span class="lineNum"> 235</span> : </span>
<span id="L236"><span class="lineNum"> 236</span> : static constexpr const _Head&amp;</span>
<span id="L237"><span class="lineNum"> 237</span> <span class="tlaGNC"> 31996304 : _M_head(const _Head_base&amp; __b) noexcept { return __b._M_head_impl; }</span></span>
<span id="L238"><span class="lineNum"> 238</span> : </span>
<span id="L239"><span class="lineNum"> 239</span> : _Head _M_head_impl;</span>
<span id="L240"><span class="lineNum"> 240</span> : };</span>
<span id="L241"><span class="lineNum"> 241</span> : </span>
<span id="L242"><span class="lineNum"> 242</span> : /**</span>
<span id="L243"><span class="lineNum"> 243</span> : * Contains the actual implementation of the @c tuple template, stored</span>
<span id="L244"><span class="lineNum"> 244</span> : * as a recursive inheritance hierarchy from the first element (most</span>
<span id="L245"><span class="lineNum"> 245</span> : * derived class) to the last (least derived class). The @c Idx</span>
<span id="L246"><span class="lineNum"> 246</span> : * parameter gives the 0-based index of the element stored at this</span>
<span id="L247"><span class="lineNum"> 247</span> : * point in the hierarchy; we use it to implement a constant-time</span>
<span id="L248"><span class="lineNum"> 248</span> : * get() operation.</span>
<span id="L249"><span class="lineNum"> 249</span> : */</span>
<span id="L250"><span class="lineNum"> 250</span> : template&lt;size_t _Idx, typename... _Elements&gt;</span>
<span id="L251"><span class="lineNum"> 251</span> : struct _Tuple_impl;</span>
<span id="L252"><span class="lineNum"> 252</span> : </span>
<span id="L253"><span class="lineNum"> 253</span> : /**</span>
<span id="L254"><span class="lineNum"> 254</span> : * Recursive tuple implementation. Here we store the @c Head element</span>
<span id="L255"><span class="lineNum"> 255</span> : * and derive from a @c Tuple_impl containing the remaining elements</span>
<span id="L256"><span class="lineNum"> 256</span> : * (which contains the @c Tail).</span>
<span id="L257"><span class="lineNum"> 257</span> : */</span>
<span id="L258"><span class="lineNum"> 258</span> : template&lt;size_t _Idx, typename _Head, typename... _Tail&gt;</span>
<span id="L259"><span class="lineNum"> 259</span> : struct _Tuple_impl&lt;_Idx, _Head, _Tail...&gt;</span>
<span id="L260"><span class="lineNum"> 260</span> : : public _Tuple_impl&lt;_Idx + 1, _Tail...&gt;,</span>
<span id="L261"><span class="lineNum"> 261</span> : private _Head_base&lt;_Idx, _Head&gt;</span>
<span id="L262"><span class="lineNum"> 262</span> : {</span>
<span id="L263"><span class="lineNum"> 263</span> : template&lt;size_t, typename...&gt; friend struct _Tuple_impl;</span>
<span id="L264"><span class="lineNum"> 264</span> : </span>
<span id="L265"><span class="lineNum"> 265</span> : typedef _Tuple_impl&lt;_Idx + 1, _Tail...&gt; _Inherited;</span>
<span id="L266"><span class="lineNum"> 266</span> : typedef _Head_base&lt;_Idx, _Head&gt; _Base;</span>
<span id="L267"><span class="lineNum"> 267</span> : </span>
<span id="L268"><span class="lineNum"> 268</span> : static constexpr _Head&amp;</span>
<span id="L269"><span class="lineNum"> 269</span> <span class="tlaGNC"> 3736022 : _M_head(_Tuple_impl&amp; __t) noexcept { return _Base::_M_head(__t); }</span></span>
<span id="L270"><span class="lineNum"> 270</span> : </span>
<span id="L271"><span class="lineNum"> 271</span> : static constexpr const _Head&amp;</span>
<span id="L272"><span class="lineNum"> 272</span> <span class="tlaGNC"> 31996304 : _M_head(const _Tuple_impl&amp; __t) noexcept { return _Base::_M_head(__t); }</span></span>
<span id="L273"><span class="lineNum"> 273</span> : </span>
<span id="L274"><span class="lineNum"> 274</span> : static constexpr _Inherited&amp;</span>
<span id="L275"><span class="lineNum"> 275</span> <span class="tlaGNC"> 1144 : _M_tail(_Tuple_impl&amp; __t) noexcept { return __t; }</span></span>
<span id="L276"><span class="lineNum"> 276</span> : </span>
<span id="L277"><span class="lineNum"> 277</span> : static constexpr const _Inherited&amp;</span>
<span id="L278"><span class="lineNum"> 278</span> : _M_tail(const _Tuple_impl&amp; __t) noexcept { return __t; }</span>
<span id="L279"><span class="lineNum"> 279</span> : </span>
<span id="L280"><span class="lineNum"> 280</span> <span class="tlaGNC"> 2051824 : constexpr _Tuple_impl()</span></span>
<span id="L281"><span class="lineNum"> 281</span> <span class="tlaGNC"> 2051824 : : _Inherited(), _Base() { }</span></span>
<span id="L282"><span class="lineNum"> 282</span> : </span>
<span id="L283"><span class="lineNum"> 283</span> : explicit constexpr</span>
<span id="L284"><span class="lineNum"> 284</span> <span class="tlaGNC"> 572 : _Tuple_impl(const _Head&amp; __head, const _Tail&amp;... __tail)</span></span>
<span id="L285"><span class="lineNum"> 285</span> <span class="tlaGNC"> 572 : : _Inherited(__tail...), _Base(__head)</span></span>
<span id="L286"><span class="lineNum"> 286</span> <span class="tlaGNC"> 572 : { }</span></span>
<span id="L287"><span class="lineNum"> 287</span> : </span>
<span id="L288"><span class="lineNum"> 288</span> : template&lt;typename _UHead, typename... _UTail,</span>
<span id="L289"><span class="lineNum"> 289</span> : typename = __enable_if_t&lt;sizeof...(_Tail) == sizeof...(_UTail)&gt;&gt;</span>
<span id="L290"><span class="lineNum"> 290</span> : explicit constexpr</span>
<span id="L291"><span class="lineNum"> 291</span> <span class="tlaGNC"> 1216 : _Tuple_impl(_UHead&amp;&amp; __head, _UTail&amp;&amp;... __tail)</span></span>
<span id="L292"><span class="lineNum"> 292</span> : : _Inherited(std::forward&lt;_UTail&gt;(__tail)...),</span>
<span id="L293"><span class="lineNum"> 293</span> <span class="tlaGNC"> 1216 : _Base(std::forward&lt;_UHead&gt;(__head))</span></span>
<span id="L294"><span class="lineNum"> 294</span> <span class="tlaGNC"> 1216 : { }</span></span>
<span id="L295"><span class="lineNum"> 295</span> : </span>
<span id="L296"><span class="lineNum"> 296</span> : constexpr _Tuple_impl(const _Tuple_impl&amp;) = default;</span>
<span id="L297"><span class="lineNum"> 297</span> : </span>
<span id="L298"><span class="lineNum"> 298</span> : // _GLIBCXX_RESOLVE_LIB_DEFECTS</span>
<span id="L299"><span class="lineNum"> 299</span> : // 2729. Missing SFINAE on std::pair::operator=</span>
<span id="L300"><span class="lineNum"> 300</span> : _Tuple_impl&amp; operator=(const _Tuple_impl&amp;) = delete;</span>
<span id="L301"><span class="lineNum"> 301</span> : </span>
<span id="L302"><span class="lineNum"> 302</span> <span class="tlaGNC"> 1210 : _Tuple_impl(_Tuple_impl&amp;&amp;) = default;</span></span>
<span id="L303"><span class="lineNum"> 303</span> : </span>
<span id="L304"><span class="lineNum"> 304</span> : template&lt;typename... _UElements&gt;</span>
<span id="L305"><span class="lineNum"> 305</span> : constexpr</span>
<span id="L306"><span class="lineNum"> 306</span> : _Tuple_impl(const _Tuple_impl&lt;_Idx, _UElements...&gt;&amp; __in)</span>
<span id="L307"><span class="lineNum"> 307</span> : : _Inherited(_Tuple_impl&lt;_Idx, _UElements...&gt;::_M_tail(__in)),</span>
<span id="L308"><span class="lineNum"> 308</span> : _Base(_Tuple_impl&lt;_Idx, _UElements...&gt;::_M_head(__in))</span>
<span id="L309"><span class="lineNum"> 309</span> : { }</span>
<span id="L310"><span class="lineNum"> 310</span> : </span>
<span id="L311"><span class="lineNum"> 311</span> : template&lt;typename _UHead, typename... _UTails&gt;</span>
<span id="L312"><span class="lineNum"> 312</span> : constexpr</span>
<span id="L313"><span class="lineNum"> 313</span> : _Tuple_impl(_Tuple_impl&lt;_Idx, _UHead, _UTails...&gt;&amp;&amp; __in)</span>
<span id="L314"><span class="lineNum"> 314</span> : : _Inherited(std::move</span>
<span id="L315"><span class="lineNum"> 315</span> : (_Tuple_impl&lt;_Idx, _UHead, _UTails...&gt;::_M_tail(__in))),</span>
<span id="L316"><span class="lineNum"> 316</span> : _Base(std::forward&lt;_UHead&gt;</span>
<span id="L317"><span class="lineNum"> 317</span> : (_Tuple_impl&lt;_Idx, _UHead, _UTails...&gt;::_M_head(__in)))</span>
<span id="L318"><span class="lineNum"> 318</span> : { }</span>
<span id="L319"><span class="lineNum"> 319</span> : </span>
<span id="L320"><span class="lineNum"> 320</span> : #if __cplusplus &gt; 202002L</span>
<span id="L321"><span class="lineNum"> 321</span> : template&lt;typename... _UElements&gt;</span>
<span id="L322"><span class="lineNum"> 322</span> : constexpr</span>
<span id="L323"><span class="lineNum"> 323</span> : _Tuple_impl(_Tuple_impl&lt;_Idx, _UElements...&gt;&amp; __in)</span>
<span id="L324"><span class="lineNum"> 324</span> : : _Inherited(_Tuple_impl&lt;_Idx, _UElements...&gt;::_M_tail(__in)),</span>
<span id="L325"><span class="lineNum"> 325</span> : _Base(_Tuple_impl&lt;_Idx, _UElements...&gt;::_M_head(__in))</span>
<span id="L326"><span class="lineNum"> 326</span> : { }</span>
<span id="L327"><span class="lineNum"> 327</span> : </span>
<span id="L328"><span class="lineNum"> 328</span> : template&lt;typename _UHead, typename... _UTails&gt;</span>
<span id="L329"><span class="lineNum"> 329</span> : constexpr</span>
<span id="L330"><span class="lineNum"> 330</span> : _Tuple_impl(const _Tuple_impl&lt;_Idx, _UHead, _UTails...&gt;&amp;&amp; __in)</span>
<span id="L331"><span class="lineNum"> 331</span> : : _Inherited(std::move</span>
<span id="L332"><span class="lineNum"> 332</span> : (_Tuple_impl&lt;_Idx, _UHead, _UTails...&gt;::_M_tail(__in))),</span>
<span id="L333"><span class="lineNum"> 333</span> : _Base(std::forward&lt;const _UHead&gt;</span>
<span id="L334"><span class="lineNum"> 334</span> : (_Tuple_impl&lt;_Idx, _UHead, _UTails...&gt;::_M_head(__in)))</span>
<span id="L335"><span class="lineNum"> 335</span> : { }</span>
<span id="L336"><span class="lineNum"> 336</span> : #endif // C++23</span>
<span id="L337"><span class="lineNum"> 337</span> : </span>
<span id="L338"><span class="lineNum"> 338</span> : template&lt;typename _Alloc&gt;</span>
<span id="L339"><span class="lineNum"> 339</span> : _GLIBCXX20_CONSTEXPR</span>
<span id="L340"><span class="lineNum"> 340</span> : _Tuple_impl(allocator_arg_t __tag, const _Alloc&amp; __a)</span>
<span id="L341"><span class="lineNum"> 341</span> : : _Inherited(__tag, __a),</span>
<span id="L342"><span class="lineNum"> 342</span> : _Base(__tag, __use_alloc&lt;_Head&gt;(__a))</span>
<span id="L343"><span class="lineNum"> 343</span> : { }</span>
<span id="L344"><span class="lineNum"> 344</span> : </span>
<span id="L345"><span class="lineNum"> 345</span> : template&lt;typename _Alloc&gt;</span>
<span id="L346"><span class="lineNum"> 346</span> : _GLIBCXX20_CONSTEXPR</span>
<span id="L347"><span class="lineNum"> 347</span> : _Tuple_impl(allocator_arg_t __tag, const _Alloc&amp; __a,</span>
<span id="L348"><span class="lineNum"> 348</span> : const _Head&amp; __head, const _Tail&amp;... __tail)</span>
<span id="L349"><span class="lineNum"> 349</span> : : _Inherited(__tag, __a, __tail...),</span>
<span id="L350"><span class="lineNum"> 350</span> : _Base(__use_alloc&lt;_Head, _Alloc, _Head&gt;(__a), __head)</span>
<span id="L351"><span class="lineNum"> 351</span> : { }</span>
<span id="L352"><span class="lineNum"> 352</span> : </span>
<span id="L353"><span class="lineNum"> 353</span> : template&lt;typename _Alloc, typename _UHead, typename... _UTail,</span>
<span id="L354"><span class="lineNum"> 354</span> : typename = __enable_if_t&lt;sizeof...(_Tail) == sizeof...(_UTail)&gt;&gt;</span>
<span id="L355"><span class="lineNum"> 355</span> : _GLIBCXX20_CONSTEXPR</span>
<span id="L356"><span class="lineNum"> 356</span> : _Tuple_impl(allocator_arg_t __tag, const _Alloc&amp; __a,</span>
<span id="L357"><span class="lineNum"> 357</span> : _UHead&amp;&amp; __head, _UTail&amp;&amp;... __tail)</span>
<span id="L358"><span class="lineNum"> 358</span> : : _Inherited(__tag, __a, std::forward&lt;_UTail&gt;(__tail)...),</span>
<span id="L359"><span class="lineNum"> 359</span> : _Base(__use_alloc&lt;_Head, _Alloc, _UHead&gt;(__a),</span>
<span id="L360"><span class="lineNum"> 360</span> : std::forward&lt;_UHead&gt;(__head))</span>
<span id="L361"><span class="lineNum"> 361</span> : { }</span>
<span id="L362"><span class="lineNum"> 362</span> : </span>
<span id="L363"><span class="lineNum"> 363</span> : template&lt;typename _Alloc&gt;</span>
<span id="L364"><span class="lineNum"> 364</span> : _GLIBCXX20_CONSTEXPR</span>
<span id="L365"><span class="lineNum"> 365</span> : _Tuple_impl(allocator_arg_t __tag, const _Alloc&amp; __a,</span>
<span id="L366"><span class="lineNum"> 366</span> : const _Tuple_impl&amp; __in)</span>
<span id="L367"><span class="lineNum"> 367</span> : : _Inherited(__tag, __a, _M_tail(__in)),</span>
<span id="L368"><span class="lineNum"> 368</span> : _Base(__use_alloc&lt;_Head, _Alloc, _Head&gt;(__a), _M_head(__in))</span>
<span id="L369"><span class="lineNum"> 369</span> : { }</span>
<span id="L370"><span class="lineNum"> 370</span> : </span>
<span id="L371"><span class="lineNum"> 371</span> : template&lt;typename _Alloc&gt;</span>
<span id="L372"><span class="lineNum"> 372</span> : _GLIBCXX20_CONSTEXPR</span>
<span id="L373"><span class="lineNum"> 373</span> : _Tuple_impl(allocator_arg_t __tag, const _Alloc&amp; __a,</span>
<span id="L374"><span class="lineNum"> 374</span> : _Tuple_impl&amp;&amp; __in)</span>
<span id="L375"><span class="lineNum"> 375</span> : : _Inherited(__tag, __a, std::move(_M_tail(__in))),</span>
<span id="L376"><span class="lineNum"> 376</span> : _Base(__use_alloc&lt;_Head, _Alloc, _Head&gt;(__a),</span>
<span id="L377"><span class="lineNum"> 377</span> : std::forward&lt;_Head&gt;(_M_head(__in)))</span>
<span id="L378"><span class="lineNum"> 378</span> : { }</span>
<span id="L379"><span class="lineNum"> 379</span> : </span>
<span id="L380"><span class="lineNum"> 380</span> : template&lt;typename _Alloc, typename _UHead, typename... _UTails&gt;</span>
<span id="L381"><span class="lineNum"> 381</span> : _GLIBCXX20_CONSTEXPR</span>
<span id="L382"><span class="lineNum"> 382</span> : _Tuple_impl(allocator_arg_t __tag, const _Alloc&amp; __a,</span>
<span id="L383"><span class="lineNum"> 383</span> : const _Tuple_impl&lt;_Idx, _UHead, _UTails...&gt;&amp; __in)</span>
<span id="L384"><span class="lineNum"> 384</span> : : _Inherited(__tag, __a,</span>
<span id="L385"><span class="lineNum"> 385</span> : _Tuple_impl&lt;_Idx, _UHead, _UTails...&gt;::_M_tail(__in)),</span>
<span id="L386"><span class="lineNum"> 386</span> : _Base(__use_alloc&lt;_Head, _Alloc, const _UHead&amp;&gt;(__a),</span>
<span id="L387"><span class="lineNum"> 387</span> : _Tuple_impl&lt;_Idx, _UHead, _UTails...&gt;::_M_head(__in))</span>
<span id="L388"><span class="lineNum"> 388</span> : { }</span>
<span id="L389"><span class="lineNum"> 389</span> : </span>
<span id="L390"><span class="lineNum"> 390</span> : template&lt;typename _Alloc, typename _UHead, typename... _UTails&gt;</span>
<span id="L391"><span class="lineNum"> 391</span> : _GLIBCXX20_CONSTEXPR</span>
<span id="L392"><span class="lineNum"> 392</span> : _Tuple_impl(allocator_arg_t __tag, const _Alloc&amp; __a,</span>
<span id="L393"><span class="lineNum"> 393</span> : _Tuple_impl&lt;_Idx, _UHead, _UTails...&gt;&amp;&amp; __in)</span>
<span id="L394"><span class="lineNum"> 394</span> : : _Inherited(__tag, __a, std::move</span>
<span id="L395"><span class="lineNum"> 395</span> : (_Tuple_impl&lt;_Idx, _UHead, _UTails...&gt;::_M_tail(__in))),</span>
<span id="L396"><span class="lineNum"> 396</span> : _Base(__use_alloc&lt;_Head, _Alloc, _UHead&gt;(__a),</span>
<span id="L397"><span class="lineNum"> 397</span> : std::forward&lt;_UHead&gt;</span>
<span id="L398"><span class="lineNum"> 398</span> : (_Tuple_impl&lt;_Idx, _UHead, _UTails...&gt;::_M_head(__in)))</span>
<span id="L399"><span class="lineNum"> 399</span> : { }</span>
<span id="L400"><span class="lineNum"> 400</span> : </span>
<span id="L401"><span class="lineNum"> 401</span> : #if __cplusplus &gt; 202002L</span>
<span id="L402"><span class="lineNum"> 402</span> : template&lt;typename _Alloc, typename _UHead, typename... _UTails&gt;</span>
<span id="L403"><span class="lineNum"> 403</span> : constexpr</span>
<span id="L404"><span class="lineNum"> 404</span> : _Tuple_impl(allocator_arg_t __tag, const _Alloc&amp; __a,</span>
<span id="L405"><span class="lineNum"> 405</span> : _Tuple_impl&lt;_Idx, _UHead, _UTails...&gt;&amp; __in)</span>
<span id="L406"><span class="lineNum"> 406</span> : : _Inherited(__tag, __a,</span>
<span id="L407"><span class="lineNum"> 407</span> : _Tuple_impl&lt;_Idx, _UHead, _UTails...&gt;::_M_tail(__in)),</span>
<span id="L408"><span class="lineNum"> 408</span> : _Base(__use_alloc&lt;_Head, _Alloc, _UHead&amp;&gt;(__a),</span>
<span id="L409"><span class="lineNum"> 409</span> : _Tuple_impl&lt;_Idx, _UHead, _UTails...&gt;::_M_head(__in))</span>
<span id="L410"><span class="lineNum"> 410</span> : { }</span>
<span id="L411"><span class="lineNum"> 411</span> : </span>
<span id="L412"><span class="lineNum"> 412</span> : template&lt;typename _Alloc, typename _UHead, typename... _UTails&gt;</span>
<span id="L413"><span class="lineNum"> 413</span> : constexpr</span>
<span id="L414"><span class="lineNum"> 414</span> : _Tuple_impl(allocator_arg_t __tag, const _Alloc&amp; __a,</span>
<span id="L415"><span class="lineNum"> 415</span> : const _Tuple_impl&lt;_Idx, _UHead, _UTails...&gt;&amp;&amp; __in)</span>
<span id="L416"><span class="lineNum"> 416</span> : : _Inherited(__tag, __a, std::move</span>
<span id="L417"><span class="lineNum"> 417</span> : (_Tuple_impl&lt;_Idx, _UHead, _UTails...&gt;::_M_tail(__in))),</span>
<span id="L418"><span class="lineNum"> 418</span> : _Base(__use_alloc&lt;_Head, _Alloc, const _UHead&gt;(__a),</span>
<span id="L419"><span class="lineNum"> 419</span> : std::forward&lt;const _UHead&gt;</span>
<span id="L420"><span class="lineNum"> 420</span> : (_Tuple_impl&lt;_Idx, _UHead, _UTails...&gt;::_M_head(__in)))</span>
<span id="L421"><span class="lineNum"> 421</span> : { }</span>
<span id="L422"><span class="lineNum"> 422</span> : #endif // C++23</span>
<span id="L423"><span class="lineNum"> 423</span> : </span>
<span id="L424"><span class="lineNum"> 424</span> : template&lt;typename... _UElements&gt;</span>
<span id="L425"><span class="lineNum"> 425</span> : _GLIBCXX20_CONSTEXPR</span>
<span id="L426"><span class="lineNum"> 426</span> : void</span>
<span id="L427"><span class="lineNum"> 427</span> : _M_assign(const _Tuple_impl&lt;_Idx, _UElements...&gt;&amp; __in)</span>
<span id="L428"><span class="lineNum"> 428</span> : {</span>
<span id="L429"><span class="lineNum"> 429</span> : _M_head(*this) = _Tuple_impl&lt;_Idx, _UElements...&gt;::_M_head(__in);</span>
<span id="L430"><span class="lineNum"> 430</span> : _M_tail(*this)._M_assign(</span>
<span id="L431"><span class="lineNum"> 431</span> : _Tuple_impl&lt;_Idx, _UElements...&gt;::_M_tail(__in));</span>
<span id="L432"><span class="lineNum"> 432</span> : }</span>
<span id="L433"><span class="lineNum"> 433</span> : </span>
<span id="L434"><span class="lineNum"> 434</span> : template&lt;typename _UHead, typename... _UTails&gt;</span>
<span id="L435"><span class="lineNum"> 435</span> : _GLIBCXX20_CONSTEXPR</span>
<span id="L436"><span class="lineNum"> 436</span> : void</span>
<span id="L437"><span class="lineNum"> 437</span> <span class="tlaGNC"> 572 : _M_assign(_Tuple_impl&lt;_Idx, _UHead, _UTails...&gt;&amp;&amp; __in)</span></span>
<span id="L438"><span class="lineNum"> 438</span> : {</span>
<span id="L439"><span class="lineNum"> 439</span> <span class="tlaGNC"> 572 : _M_head(*this) = std::forward&lt;_UHead&gt;</span></span>
<span id="L440"><span class="lineNum"> 440</span> <span class="tlaGNC"> 572 : (_Tuple_impl&lt;_Idx, _UHead, _UTails...&gt;::_M_head(__in));</span></span>
<span id="L441"><span class="lineNum"> 441</span> <span class="tlaGNC"> 1144 : _M_tail(*this)._M_assign(</span></span>
<span id="L442"><span class="lineNum"> 442</span> <span class="tlaGNC"> 572 : std::move(_Tuple_impl&lt;_Idx, _UHead, _UTails...&gt;::_M_tail(__in)));</span></span>
<span id="L443"><span class="lineNum"> 443</span> <span class="tlaGNC"> 572 : }</span></span>
<span id="L444"><span class="lineNum"> 444</span> : </span>
<span id="L445"><span class="lineNum"> 445</span> : #if __cplusplus &gt; 202002L</span>
<span id="L446"><span class="lineNum"> 446</span> : template&lt;typename... _UElements&gt;</span>
<span id="L447"><span class="lineNum"> 447</span> : constexpr void</span>
<span id="L448"><span class="lineNum"> 448</span> : _M_assign(const _Tuple_impl&lt;_Idx, _UElements...&gt;&amp; __in) const</span>
<span id="L449"><span class="lineNum"> 449</span> : {</span>
<span id="L450"><span class="lineNum"> 450</span> : _M_head(*this) = _Tuple_impl&lt;_Idx, _UElements...&gt;::_M_head(__in);</span>
<span id="L451"><span class="lineNum"> 451</span> : _M_tail(*this)._M_assign(</span>
<span id="L452"><span class="lineNum"> 452</span> : _Tuple_impl&lt;_Idx, _UElements...&gt;::_M_tail(__in));</span>
<span id="L453"><span class="lineNum"> 453</span> : }</span>
<span id="L454"><span class="lineNum"> 454</span> : </span>
<span id="L455"><span class="lineNum"> 455</span> : template&lt;typename _UHead, typename... _UTails&gt;</span>
<span id="L456"><span class="lineNum"> 456</span> : constexpr void</span>
<span id="L457"><span class="lineNum"> 457</span> : _M_assign(_Tuple_impl&lt;_Idx, _UHead, _UTails...&gt;&amp;&amp; __in) const</span>
<span id="L458"><span class="lineNum"> 458</span> : {</span>
<span id="L459"><span class="lineNum"> 459</span> : _M_head(*this) = std::forward&lt;_UHead&gt;</span>
<span id="L460"><span class="lineNum"> 460</span> : (_Tuple_impl&lt;_Idx, _UHead, _UTails...&gt;::_M_head(__in));</span>
<span id="L461"><span class="lineNum"> 461</span> : _M_tail(*this)._M_assign(</span>
<span id="L462"><span class="lineNum"> 462</span> : std::move(_Tuple_impl&lt;_Idx, _UHead, _UTails...&gt;::_M_tail(__in)));</span>
<span id="L463"><span class="lineNum"> 463</span> : }</span>
<span id="L464"><span class="lineNum"> 464</span> : #endif // C++23</span>
<span id="L465"><span class="lineNum"> 465</span> : </span>
<span id="L466"><span class="lineNum"> 466</span> : protected:</span>
<span id="L467"><span class="lineNum"> 467</span> : _GLIBCXX20_CONSTEXPR</span>
<span id="L468"><span class="lineNum"> 468</span> : void</span>
<span id="L469"><span class="lineNum"> 469</span> : _M_swap(_Tuple_impl&amp; __in)</span>
<span id="L470"><span class="lineNum"> 470</span> : {</span>
<span id="L471"><span class="lineNum"> 471</span> : using std::swap;</span>
<span id="L472"><span class="lineNum"> 472</span> : swap(_M_head(*this), _M_head(__in));</span>
<span id="L473"><span class="lineNum"> 473</span> : _Inherited::_M_swap(_M_tail(__in));</span>
<span id="L474"><span class="lineNum"> 474</span> : }</span>
<span id="L475"><span class="lineNum"> 475</span> : </span>
<span id="L476"><span class="lineNum"> 476</span> : #if __cplusplus &gt; 202002L</span>
<span id="L477"><span class="lineNum"> 477</span> : constexpr void</span>
<span id="L478"><span class="lineNum"> 478</span> : _M_swap(const _Tuple_impl&amp; __in) const</span>
<span id="L479"><span class="lineNum"> 479</span> : {</span>
<span id="L480"><span class="lineNum"> 480</span> : using std::swap;</span>
<span id="L481"><span class="lineNum"> 481</span> : swap(_M_head(*this), _M_head(__in));</span>
<span id="L482"><span class="lineNum"> 482</span> : _Inherited::_M_swap(_M_tail(__in));</span>
<span id="L483"><span class="lineNum"> 483</span> : }</span>
<span id="L484"><span class="lineNum"> 484</span> : #endif // C++23</span>
<span id="L485"><span class="lineNum"> 485</span> : };</span>
<span id="L486"><span class="lineNum"> 486</span> : </span>
<span id="L487"><span class="lineNum"> 487</span> : // Basis case of inheritance recursion.</span>
<span id="L488"><span class="lineNum"> 488</span> : template&lt;size_t _Idx, typename _Head&gt;</span>
<span id="L489"><span class="lineNum"> 489</span> : struct _Tuple_impl&lt;_Idx, _Head&gt;</span>
<span id="L490"><span class="lineNum"> 490</span> : : private _Head_base&lt;_Idx, _Head&gt;</span>
<span id="L491"><span class="lineNum"> 491</span> : {</span>
<span id="L492"><span class="lineNum"> 492</span> : template&lt;size_t, typename...&gt; friend struct _Tuple_impl;</span>
<span id="L493"><span class="lineNum"> 493</span> : </span>
<span id="L494"><span class="lineNum"> 494</span> : typedef _Head_base&lt;_Idx, _Head&gt; _Base;</span>
<span id="L495"><span class="lineNum"> 495</span> : </span>
<span id="L496"><span class="lineNum"> 496</span> : static constexpr _Head&amp;</span>
<span id="L497"><span class="lineNum"> 497</span> <span class="tlaGNC"> 13535726 : _M_head(_Tuple_impl&amp; __t) noexcept { return _Base::_M_head(__t); }</span></span>
<span id="L498"><span class="lineNum"> 498</span> : </span>
<span id="L499"><span class="lineNum"> 499</span> : static constexpr const _Head&amp;</span>
<span id="L500"><span class="lineNum"> 500</span> <span class="tlaUNC tlaBgUNC"> 0 : _M_head(const _Tuple_impl&amp; __t) noexcept { return _Base::_M_head(__t); }</span></span>
<span id="L501"><span class="lineNum"> 501</span> : </span>
<span id="L502"><span class="lineNum"> 502</span> : constexpr</span>
<span id="L503"><span class="lineNum"> 503</span> <span class="tlaGNC tlaBgGNC"> 2051824 : _Tuple_impl()</span></span>
<span id="L504"><span class="lineNum"> 504</span> <span class="tlaGNC"> 2051824 : : _Base() { }</span></span>
<span id="L505"><span class="lineNum"> 505</span> : </span>
<span id="L506"><span class="lineNum"> 506</span> : explicit constexpr</span>
<span id="L507"><span class="lineNum"> 507</span> <span class="tlaGNC"> 8757332 : _Tuple_impl(const _Head&amp; __head)</span></span>
<span id="L508"><span class="lineNum"> 508</span> <span class="tlaGNC"> 8757332 : : _Base(__head)</span></span>
<span id="L509"><span class="lineNum"> 509</span> <span class="tlaGNC"> 8757332 : { }</span></span>
<span id="L510"><span class="lineNum"> 510</span> : </span>
<span id="L511"><span class="lineNum"> 511</span> : template&lt;typename _UHead&gt;</span>
<span id="L512"><span class="lineNum"> 512</span> : explicit constexpr</span>
<span id="L513"><span class="lineNum"> 513</span> <span class="tlaGNC"> 4735574 : _Tuple_impl(_UHead&amp;&amp; __head)</span></span>
<span id="L514"><span class="lineNum"> 514</span> <span class="tlaGNC"> 4735574 : : _Base(std::forward&lt;_UHead&gt;(__head))</span></span>
<span id="L515"><span class="lineNum"> 515</span> <span class="tlaGNC"> 4735574 : { }</span></span>
<span id="L516"><span class="lineNum"> 516</span> : </span>
<span id="L517"><span class="lineNum"> 517</span> : constexpr _Tuple_impl(const _Tuple_impl&amp;) = default;</span>
<span id="L518"><span class="lineNum"> 518</span> : </span>
<span id="L519"><span class="lineNum"> 519</span> : // _GLIBCXX_RESOLVE_LIB_DEFECTS</span>
<span id="L520"><span class="lineNum"> 520</span> : // 2729. Missing SFINAE on std::pair::operator=</span>
<span id="L521"><span class="lineNum"> 521</span> : _Tuple_impl&amp; operator=(const _Tuple_impl&amp;) = delete;</span>
<span id="L522"><span class="lineNum"> 522</span> : </span>
<span id="L523"><span class="lineNum"> 523</span> : #if _GLIBCXX_INLINE_VERSION</span>
<span id="L524"><span class="lineNum"> 524</span> : _Tuple_impl(_Tuple_impl&amp;&amp;) = default;</span>
<span id="L525"><span class="lineNum"> 525</span> : #else</span>
<span id="L526"><span class="lineNum"> 526</span> : constexpr</span>
<span id="L527"><span class="lineNum"> 527</span> <span class="tlaGNC"> 11887166 : _Tuple_impl(_Tuple_impl&amp;&amp; __in)</span></span>
<span id="L528"><span class="lineNum"> 528</span> : noexcept(is_nothrow_move_constructible&lt;_Head&gt;::value)</span>
<span id="L529"><span class="lineNum"> 529</span> <span class="tlaGNC"> 11885956 : : _Base(static_cast&lt;_Base&amp;&amp;&gt;(__in))</span></span>
<span id="L530"><span class="lineNum"> 530</span> <span class="tlaGNC"> 11887166 : { }</span></span>
<span id="L531"><span class="lineNum"> 531</span> : #endif</span>
<span id="L532"><span class="lineNum"> 532</span> : </span>
<span id="L533"><span class="lineNum"> 533</span> : template&lt;typename _UHead&gt;</span>
<span id="L534"><span class="lineNum"> 534</span> : constexpr</span>
<span id="L535"><span class="lineNum"> 535</span> : _Tuple_impl(const _Tuple_impl&lt;_Idx, _UHead&gt;&amp; __in)</span>
<span id="L536"><span class="lineNum"> 536</span> : : _Base(_Tuple_impl&lt;_Idx, _UHead&gt;::_M_head(__in))</span>
<span id="L537"><span class="lineNum"> 537</span> : { }</span>
<span id="L538"><span class="lineNum"> 538</span> : </span>
<span id="L539"><span class="lineNum"> 539</span> : template&lt;typename _UHead&gt;</span>
<span id="L540"><span class="lineNum"> 540</span> : constexpr</span>
<span id="L541"><span class="lineNum"> 541</span> : _Tuple_impl(_Tuple_impl&lt;_Idx, _UHead&gt;&amp;&amp; __in)</span>
<span id="L542"><span class="lineNum"> 542</span> : : _Base(std::forward&lt;_UHead&gt;(_Tuple_impl&lt;_Idx, _UHead&gt;::_M_head(__in)))</span>
<span id="L543"><span class="lineNum"> 543</span> : { }</span>
<span id="L544"><span class="lineNum"> 544</span> : </span>
<span id="L545"><span class="lineNum"> 545</span> : #if __cplusplus &gt; 202002L</span>
<span id="L546"><span class="lineNum"> 546</span> : template&lt;typename _UHead&gt;</span>
<span id="L547"><span class="lineNum"> 547</span> : constexpr</span>
<span id="L548"><span class="lineNum"> 548</span> : _Tuple_impl(_Tuple_impl&lt;_Idx, _UHead&gt;&amp; __in)</span>
<span id="L549"><span class="lineNum"> 549</span> : : _Base(_Tuple_impl&lt;_Idx, _UHead&gt;::_M_head(__in))</span>
<span id="L550"><span class="lineNum"> 550</span> : { }</span>
<span id="L551"><span class="lineNum"> 551</span> : </span>
<span id="L552"><span class="lineNum"> 552</span> : template&lt;typename _UHead&gt;</span>
<span id="L553"><span class="lineNum"> 553</span> : constexpr</span>
<span id="L554"><span class="lineNum"> 554</span> : _Tuple_impl(const _Tuple_impl&lt;_Idx, _UHead&gt;&amp;&amp; __in)</span>
<span id="L555"><span class="lineNum"> 555</span> : : _Base(std::forward&lt;const _UHead&gt;(_Tuple_impl&lt;_Idx, _UHead&gt;::_M_head(__in)))</span>
<span id="L556"><span class="lineNum"> 556</span> : { }</span>
<span id="L557"><span class="lineNum"> 557</span> : #endif // C++23</span>
<span id="L558"><span class="lineNum"> 558</span> : </span>
<span id="L559"><span class="lineNum"> 559</span> : template&lt;typename _Alloc&gt;</span>
<span id="L560"><span class="lineNum"> 560</span> : _GLIBCXX20_CONSTEXPR</span>
<span id="L561"><span class="lineNum"> 561</span> : _Tuple_impl(allocator_arg_t __tag, const _Alloc&amp; __a)</span>
<span id="L562"><span class="lineNum"> 562</span> : : _Base(__tag, __use_alloc&lt;_Head&gt;(__a))</span>
<span id="L563"><span class="lineNum"> 563</span> : { }</span>
<span id="L564"><span class="lineNum"> 564</span> : </span>
<span id="L565"><span class="lineNum"> 565</span> : template&lt;typename _Alloc&gt;</span>
<span id="L566"><span class="lineNum"> 566</span> : _GLIBCXX20_CONSTEXPR</span>
<span id="L567"><span class="lineNum"> 567</span> : _Tuple_impl(allocator_arg_t, const _Alloc&amp; __a,</span>
<span id="L568"><span class="lineNum"> 568</span> : const _Head&amp; __head)</span>
<span id="L569"><span class="lineNum"> 569</span> : : _Base(__use_alloc&lt;_Head, _Alloc, const _Head&amp;&gt;(__a), __head)</span>
<span id="L570"><span class="lineNum"> 570</span> : { }</span>
<span id="L571"><span class="lineNum"> 571</span> : </span>
<span id="L572"><span class="lineNum"> 572</span> : template&lt;typename _Alloc, typename _UHead&gt;</span>
<span id="L573"><span class="lineNum"> 573</span> : _GLIBCXX20_CONSTEXPR</span>
<span id="L574"><span class="lineNum"> 574</span> : _Tuple_impl(allocator_arg_t, const _Alloc&amp; __a,</span>
<span id="L575"><span class="lineNum"> 575</span> : _UHead&amp;&amp; __head)</span>
<span id="L576"><span class="lineNum"> 576</span> : : _Base(__use_alloc&lt;_Head, _Alloc, _UHead&gt;(__a),</span>
<span id="L577"><span class="lineNum"> 577</span> : std::forward&lt;_UHead&gt;(__head))</span>
<span id="L578"><span class="lineNum"> 578</span> : { }</span>
<span id="L579"><span class="lineNum"> 579</span> : </span>
<span id="L580"><span class="lineNum"> 580</span> : template&lt;typename _Alloc&gt;</span>
<span id="L581"><span class="lineNum"> 581</span> : _GLIBCXX20_CONSTEXPR</span>
<span id="L582"><span class="lineNum"> 582</span> : _Tuple_impl(allocator_arg_t, const _Alloc&amp; __a,</span>
<span id="L583"><span class="lineNum"> 583</span> : const _Tuple_impl&amp; __in)</span>
<span id="L584"><span class="lineNum"> 584</span> : : _Base(__use_alloc&lt;_Head, _Alloc, const _Head&amp;&gt;(__a), _M_head(__in))</span>
<span id="L585"><span class="lineNum"> 585</span> : { }</span>
<span id="L586"><span class="lineNum"> 586</span> : </span>
<span id="L587"><span class="lineNum"> 587</span> : template&lt;typename _Alloc&gt;</span>
<span id="L588"><span class="lineNum"> 588</span> : _GLIBCXX20_CONSTEXPR</span>
<span id="L589"><span class="lineNum"> 589</span> : _Tuple_impl(allocator_arg_t, const _Alloc&amp; __a,</span>
<span id="L590"><span class="lineNum"> 590</span> : _Tuple_impl&amp;&amp; __in)</span>
<span id="L591"><span class="lineNum"> 591</span> : : _Base(__use_alloc&lt;_Head, _Alloc, _Head&gt;(__a),</span>
<span id="L592"><span class="lineNum"> 592</span> : std::forward&lt;_Head&gt;(_M_head(__in)))</span>
<span id="L593"><span class="lineNum"> 593</span> : { }</span>
<span id="L594"><span class="lineNum"> 594</span> : </span>
<span id="L595"><span class="lineNum"> 595</span> : template&lt;typename _Alloc, typename _UHead&gt;</span>
<span id="L596"><span class="lineNum"> 596</span> : _GLIBCXX20_CONSTEXPR</span>
<span id="L597"><span class="lineNum"> 597</span> : _Tuple_impl(allocator_arg_t, const _Alloc&amp; __a,</span>
<span id="L598"><span class="lineNum"> 598</span> : const _Tuple_impl&lt;_Idx, _UHead&gt;&amp; __in)</span>
<span id="L599"><span class="lineNum"> 599</span> : : _Base(__use_alloc&lt;_Head, _Alloc, const _UHead&amp;&gt;(__a),</span>
<span id="L600"><span class="lineNum"> 600</span> : _Tuple_impl&lt;_Idx, _UHead&gt;::_M_head(__in))</span>
<span id="L601"><span class="lineNum"> 601</span> : { }</span>
<span id="L602"><span class="lineNum"> 602</span> : </span>
<span id="L603"><span class="lineNum"> 603</span> : template&lt;typename _Alloc, typename _UHead&gt;</span>
<span id="L604"><span class="lineNum"> 604</span> : _GLIBCXX20_CONSTEXPR</span>
<span id="L605"><span class="lineNum"> 605</span> : _Tuple_impl(allocator_arg_t, const _Alloc&amp; __a,</span>
<span id="L606"><span class="lineNum"> 606</span> : _Tuple_impl&lt;_Idx, _UHead&gt;&amp;&amp; __in)</span>
<span id="L607"><span class="lineNum"> 607</span> : : _Base(__use_alloc&lt;_Head, _Alloc, _UHead&gt;(__a),</span>
<span id="L608"><span class="lineNum"> 608</span> : std::forward&lt;_UHead&gt;(_Tuple_impl&lt;_Idx, _UHead&gt;::_M_head(__in)))</span>
<span id="L609"><span class="lineNum"> 609</span> : { }</span>
<span id="L610"><span class="lineNum"> 610</span> : </span>
<span id="L611"><span class="lineNum"> 611</span> : #if __cplusplus &gt; 202002L</span>
<span id="L612"><span class="lineNum"> 612</span> : template&lt;typename _Alloc, typename _UHead&gt;</span>
<span id="L613"><span class="lineNum"> 613</span> : constexpr</span>
<span id="L614"><span class="lineNum"> 614</span> : _Tuple_impl(allocator_arg_t, const _Alloc&amp; __a,</span>
<span id="L615"><span class="lineNum"> 615</span> : _Tuple_impl&lt;_Idx, _UHead&gt;&amp; __in)</span>
<span id="L616"><span class="lineNum"> 616</span> : : _Base(__use_alloc&lt;_Head, _Alloc, _UHead&amp;&gt;(__a),</span>
<span id="L617"><span class="lineNum"> 617</span> : _Tuple_impl&lt;_Idx, _UHead&gt;::_M_head(__in))</span>
<span id="L618"><span class="lineNum"> 618</span> : { }</span>
<span id="L619"><span class="lineNum"> 619</span> : </span>
<span id="L620"><span class="lineNum"> 620</span> : template&lt;typename _Alloc, typename _UHead&gt;</span>
<span id="L621"><span class="lineNum"> 621</span> : constexpr</span>
<span id="L622"><span class="lineNum"> 622</span> : _Tuple_impl(allocator_arg_t, const _Alloc&amp; __a,</span>
<span id="L623"><span class="lineNum"> 623</span> : const _Tuple_impl&lt;_Idx, _UHead&gt;&amp;&amp; __in)</span>
<span id="L624"><span class="lineNum"> 624</span> : : _Base(__use_alloc&lt;_Head, _Alloc, const _UHead&gt;(__a),</span>
<span id="L625"><span class="lineNum"> 625</span> : std::forward&lt;const _UHead&gt;(_Tuple_impl&lt;_Idx, _UHead&gt;::_M_head(__in)))</span>
<span id="L626"><span class="lineNum"> 626</span> : { }</span>
<span id="L627"><span class="lineNum"> 627</span> : #endif // C++23</span>
<span id="L628"><span class="lineNum"> 628</span> : </span>
<span id="L629"><span class="lineNum"> 629</span> : template&lt;typename _UHead&gt;</span>
<span id="L630"><span class="lineNum"> 630</span> : _GLIBCXX20_CONSTEXPR</span>
<span id="L631"><span class="lineNum"> 631</span> : void</span>
<span id="L632"><span class="lineNum"> 632</span> : _M_assign(const _Tuple_impl&lt;_Idx, _UHead&gt;&amp; __in)</span>
<span id="L633"><span class="lineNum"> 633</span> : {</span>
<span id="L634"><span class="lineNum"> 634</span> : _M_head(*this) = _Tuple_impl&lt;_Idx, _UHead&gt;::_M_head(__in);</span>
<span id="L635"><span class="lineNum"> 635</span> : }</span>
<span id="L636"><span class="lineNum"> 636</span> : </span>
<span id="L637"><span class="lineNum"> 637</span> : template&lt;typename _UHead&gt;</span>
<span id="L638"><span class="lineNum"> 638</span> : _GLIBCXX20_CONSTEXPR</span>
<span id="L639"><span class="lineNum"> 639</span> : void</span>
<span id="L640"><span class="lineNum"> 640</span> <span class="tlaGNC"> 286 : _M_assign(_Tuple_impl&lt;_Idx, _UHead&gt;&amp;&amp; __in)</span></span>
<span id="L641"><span class="lineNum"> 641</span> : {</span>
<span id="L642"><span class="lineNum"> 642</span> <span class="tlaGNC"> 286 : _M_head(*this)</span></span>
<span id="L643"><span class="lineNum"> 643</span> <span class="tlaGNC"> 286 : = std::forward&lt;_UHead&gt;(_Tuple_impl&lt;_Idx, _UHead&gt;::_M_head(__in));</span></span>
<span id="L644"><span class="lineNum"> 644</span> <span class="tlaGNC"> 286 : }</span></span>
<span id="L645"><span class="lineNum"> 645</span> : </span>
<span id="L646"><span class="lineNum"> 646</span> : #if __cplusplus &gt; 202002L</span>
<span id="L647"><span class="lineNum"> 647</span> : template&lt;typename _UHead&gt;</span>
<span id="L648"><span class="lineNum"> 648</span> : constexpr void</span>
<span id="L649"><span class="lineNum"> 649</span> : _M_assign(const _Tuple_impl&lt;_Idx, _UHead&gt;&amp; __in) const</span>
<span id="L650"><span class="lineNum"> 650</span> : {</span>
<span id="L651"><span class="lineNum"> 651</span> : _M_head(*this) = _Tuple_impl&lt;_Idx, _UHead&gt;::_M_head(__in);</span>
<span id="L652"><span class="lineNum"> 652</span> : }</span>
<span id="L653"><span class="lineNum"> 653</span> : </span>
<span id="L654"><span class="lineNum"> 654</span> : template&lt;typename _UHead&gt;</span>
<span id="L655"><span class="lineNum"> 655</span> : constexpr void</span>
<span id="L656"><span class="lineNum"> 656</span> : _M_assign(_Tuple_impl&lt;_Idx, _UHead&gt;&amp;&amp; __in) const</span>
<span id="L657"><span class="lineNum"> 657</span> : {</span>
<span id="L658"><span class="lineNum"> 658</span> : _M_head(*this)</span>
<span id="L659"><span class="lineNum"> 659</span> : = std::forward&lt;_UHead&gt;(_Tuple_impl&lt;_Idx, _UHead&gt;::_M_head(__in));</span>
<span id="L660"><span class="lineNum"> 660</span> : }</span>
<span id="L661"><span class="lineNum"> 661</span> : #endif // C++23</span>
<span id="L662"><span class="lineNum"> 662</span> : </span>
<span id="L663"><span class="lineNum"> 663</span> : protected:</span>
<span id="L664"><span class="lineNum"> 664</span> : _GLIBCXX20_CONSTEXPR</span>
<span id="L665"><span class="lineNum"> 665</span> : void</span>
<span id="L666"><span class="lineNum"> 666</span> : _M_swap(_Tuple_impl&amp; __in)</span>
<span id="L667"><span class="lineNum"> 667</span> : {</span>
<span id="L668"><span class="lineNum"> 668</span> : using std::swap;</span>
<span id="L669"><span class="lineNum"> 669</span> : swap(_M_head(*this), _M_head(__in));</span>
<span id="L670"><span class="lineNum"> 670</span> : }</span>
<span id="L671"><span class="lineNum"> 671</span> : </span>
<span id="L672"><span class="lineNum"> 672</span> : #if __cplusplus &gt; 202002L</span>
<span id="L673"><span class="lineNum"> 673</span> : constexpr void</span>
<span id="L674"><span class="lineNum"> 674</span> : _M_swap(const _Tuple_impl&amp; __in) const</span>
<span id="L675"><span class="lineNum"> 675</span> : {</span>
<span id="L676"><span class="lineNum"> 676</span> : using std::swap;</span>
<span id="L677"><span class="lineNum"> 677</span> : swap(_M_head(*this), _M_head(__in));</span>
<span id="L678"><span class="lineNum"> 678</span> : }</span>
<span id="L679"><span class="lineNum"> 679</span> : #endif // C++23</span>
<span id="L680"><span class="lineNum"> 680</span> : };</span>
<span id="L681"><span class="lineNum"> 681</span> : </span>
<span id="L682"><span class="lineNum"> 682</span> : // Concept utility functions, reused in conditionally-explicit</span>
<span id="L683"><span class="lineNum"> 683</span> : // constructors.</span>
<span id="L684"><span class="lineNum"> 684</span> : template&lt;bool, typename... _Types&gt;</span>
<span id="L685"><span class="lineNum"> 685</span> : struct _TupleConstraints</span>
<span id="L686"><span class="lineNum"> 686</span> : {</span>
<span id="L687"><span class="lineNum"> 687</span> : template&lt;typename... _UTypes&gt;</span>
<span id="L688"><span class="lineNum"> 688</span> : using __constructible = __and_&lt;is_constructible&lt;_Types, _UTypes&gt;...&gt;;</span>
<span id="L689"><span class="lineNum"> 689</span> : </span>
<span id="L690"><span class="lineNum"> 690</span> : template&lt;typename... _UTypes&gt;</span>
<span id="L691"><span class="lineNum"> 691</span> : using __convertible = __and_&lt;is_convertible&lt;_UTypes, _Types&gt;...&gt;;</span>
<span id="L692"><span class="lineNum"> 692</span> : </span>
<span id="L693"><span class="lineNum"> 693</span> : // Constraint for a non-explicit constructor.</span>
<span id="L694"><span class="lineNum"> 694</span> : // True iff each Ti in _Types... can be constructed from Ui in _UTypes...</span>
<span id="L695"><span class="lineNum"> 695</span> : // and every Ui is implicitly convertible to Ti.</span>
<span id="L696"><span class="lineNum"> 696</span> : template&lt;typename... _UTypes&gt;</span>
<span id="L697"><span class="lineNum"> 697</span> : static constexpr bool __is_implicitly_constructible()</span>
<span id="L698"><span class="lineNum"> 698</span> : {</span>
<span id="L699"><span class="lineNum"> 699</span> : return __and_&lt;__constructible&lt;_UTypes...&gt;,</span>
<span id="L700"><span class="lineNum"> 700</span> : __convertible&lt;_UTypes...&gt;</span>
<span id="L701"><span class="lineNum"> 701</span> : &gt;::value;</span>
<span id="L702"><span class="lineNum"> 702</span> : }</span>
<span id="L703"><span class="lineNum"> 703</span> : </span>
<span id="L704"><span class="lineNum"> 704</span> : // Constraint for a non-explicit constructor.</span>
<span id="L705"><span class="lineNum"> 705</span> : // True iff each Ti in _Types... can be constructed from Ui in _UTypes...</span>
<span id="L706"><span class="lineNum"> 706</span> : // but not every Ui is implicitly convertible to Ti.</span>
<span id="L707"><span class="lineNum"> 707</span> : template&lt;typename... _UTypes&gt;</span>
<span id="L708"><span class="lineNum"> 708</span> : static constexpr bool __is_explicitly_constructible()</span>
<span id="L709"><span class="lineNum"> 709</span> : {</span>
<span id="L710"><span class="lineNum"> 710</span> : return __and_&lt;__constructible&lt;_UTypes...&gt;,</span>
<span id="L711"><span class="lineNum"> 711</span> : __not_&lt;__convertible&lt;_UTypes...&gt;&gt;</span>
<span id="L712"><span class="lineNum"> 712</span> : &gt;::value;</span>
<span id="L713"><span class="lineNum"> 713</span> : }</span>
<span id="L714"><span class="lineNum"> 714</span> : </span>
<span id="L715"><span class="lineNum"> 715</span> : static constexpr bool __is_implicitly_default_constructible()</span>
<span id="L716"><span class="lineNum"> 716</span> : {</span>
<span id="L717"><span class="lineNum"> 717</span> : return __and_&lt;std::__is_implicitly_default_constructible&lt;_Types&gt;...</span>
<span id="L718"><span class="lineNum"> 718</span> : &gt;::value;</span>
<span id="L719"><span class="lineNum"> 719</span> : }</span>
<span id="L720"><span class="lineNum"> 720</span> : </span>
<span id="L721"><span class="lineNum"> 721</span> : static constexpr bool __is_explicitly_default_constructible()</span>
<span id="L722"><span class="lineNum"> 722</span> : {</span>
<span id="L723"><span class="lineNum"> 723</span> : return __and_&lt;is_default_constructible&lt;_Types&gt;...,</span>
<span id="L724"><span class="lineNum"> 724</span> : __not_&lt;__and_&lt;</span>
<span id="L725"><span class="lineNum"> 725</span> : std::__is_implicitly_default_constructible&lt;_Types&gt;...&gt;</span>
<span id="L726"><span class="lineNum"> 726</span> : &gt;&gt;::value;</span>
<span id="L727"><span class="lineNum"> 727</span> : }</span>
<span id="L728"><span class="lineNum"> 728</span> : };</span>
<span id="L729"><span class="lineNum"> 729</span> : </span>
<span id="L730"><span class="lineNum"> 730</span> : // Partial specialization used when a required precondition isn't met,</span>
<span id="L731"><span class="lineNum"> 731</span> : // e.g. when sizeof...(_Types) != sizeof...(_UTypes).</span>
<span id="L732"><span class="lineNum"> 732</span> : template&lt;typename... _Types&gt;</span>
<span id="L733"><span class="lineNum"> 733</span> : struct _TupleConstraints&lt;false, _Types...&gt;</span>
<span id="L734"><span class="lineNum"> 734</span> : {</span>
<span id="L735"><span class="lineNum"> 735</span> : template&lt;typename... _UTypes&gt;</span>
<span id="L736"><span class="lineNum"> 736</span> : static constexpr bool __is_implicitly_constructible()</span>
<span id="L737"><span class="lineNum"> 737</span> : { return false; }</span>
<span id="L738"><span class="lineNum"> 738</span> : </span>
<span id="L739"><span class="lineNum"> 739</span> : template&lt;typename... _UTypes&gt;</span>
<span id="L740"><span class="lineNum"> 740</span> : static constexpr bool __is_explicitly_constructible()</span>
<span id="L741"><span class="lineNum"> 741</span> : { return false; }</span>
<span id="L742"><span class="lineNum"> 742</span> : };</span>
<span id="L743"><span class="lineNum"> 743</span> : </span>
<span id="L744"><span class="lineNum"> 744</span> : /// Primary class template, tuple</span>
<span id="L745"><span class="lineNum"> 745</span> : template&lt;typename... _Elements&gt;</span>
<span id="L746"><span class="lineNum"> 746</span> : class tuple : public _Tuple_impl&lt;0, _Elements...&gt;</span>
<span id="L747"><span class="lineNum"> 747</span> : {</span>
<span id="L748"><span class="lineNum"> 748</span> : typedef _Tuple_impl&lt;0, _Elements...&gt; _Inherited;</span>
<span id="L749"><span class="lineNum"> 749</span> : </span>
<span id="L750"><span class="lineNum"> 750</span> : template&lt;bool _Cond&gt;</span>
<span id="L751"><span class="lineNum"> 751</span> : using _TCC = _TupleConstraints&lt;_Cond, _Elements...&gt;;</span>
<span id="L752"><span class="lineNum"> 752</span> : </span>
<span id="L753"><span class="lineNum"> 753</span> : // Constraint for non-explicit default constructor</span>
<span id="L754"><span class="lineNum"> 754</span> : template&lt;bool _Dummy&gt;</span>
<span id="L755"><span class="lineNum"> 755</span> : using _ImplicitDefaultCtor = __enable_if_t&lt;</span>
<span id="L756"><span class="lineNum"> 756</span> : _TCC&lt;_Dummy&gt;::__is_implicitly_default_constructible(),</span>
<span id="L757"><span class="lineNum"> 757</span> : bool&gt;;</span>
<span id="L758"><span class="lineNum"> 758</span> : </span>
<span id="L759"><span class="lineNum"> 759</span> : // Constraint for explicit default constructor</span>
<span id="L760"><span class="lineNum"> 760</span> : template&lt;bool _Dummy&gt;</span>
<span id="L761"><span class="lineNum"> 761</span> : using _ExplicitDefaultCtor = __enable_if_t&lt;</span>
<span id="L762"><span class="lineNum"> 762</span> : _TCC&lt;_Dummy&gt;::__is_explicitly_default_constructible(),</span>
<span id="L763"><span class="lineNum"> 763</span> : bool&gt;;</span>
<span id="L764"><span class="lineNum"> 764</span> : </span>
<span id="L765"><span class="lineNum"> 765</span> : // Constraint for non-explicit constructors</span>
<span id="L766"><span class="lineNum"> 766</span> : template&lt;bool _Cond, typename... _Args&gt;</span>
<span id="L767"><span class="lineNum"> 767</span> : using _ImplicitCtor = __enable_if_t&lt;</span>
<span id="L768"><span class="lineNum"> 768</span> : _TCC&lt;_Cond&gt;::template __is_implicitly_constructible&lt;_Args...&gt;(),</span>
<span id="L769"><span class="lineNum"> 769</span> : bool&gt;;</span>
<span id="L770"><span class="lineNum"> 770</span> : </span>
<span id="L771"><span class="lineNum"> 771</span> : // Constraint for non-explicit constructors</span>
<span id="L772"><span class="lineNum"> 772</span> : template&lt;bool _Cond, typename... _Args&gt;</span>
<span id="L773"><span class="lineNum"> 773</span> : using _ExplicitCtor = __enable_if_t&lt;</span>
<span id="L774"><span class="lineNum"> 774</span> : _TCC&lt;_Cond&gt;::template __is_explicitly_constructible&lt;_Args...&gt;(),</span>
<span id="L775"><span class="lineNum"> 775</span> : bool&gt;;</span>
<span id="L776"><span class="lineNum"> 776</span> : </span>
<span id="L777"><span class="lineNum"> 777</span> : template&lt;typename... _UElements&gt;</span>
<span id="L778"><span class="lineNum"> 778</span> : static constexpr</span>
<span id="L779"><span class="lineNum"> 779</span> : __enable_if_t&lt;sizeof...(_UElements) == sizeof...(_Elements), bool&gt;</span>
<span id="L780"><span class="lineNum"> 780</span> : __assignable()</span>
<span id="L781"><span class="lineNum"> 781</span> : { return __and_&lt;is_assignable&lt;_Elements&amp;, _UElements&gt;...&gt;::value; }</span>
<span id="L782"><span class="lineNum"> 782</span> : </span>
<span id="L783"><span class="lineNum"> 783</span> : // Condition for noexcept-specifier of an assignment operator.</span>
<span id="L784"><span class="lineNum"> 784</span> : template&lt;typename... _UElements&gt;</span>
<span id="L785"><span class="lineNum"> 785</span> : static constexpr bool __nothrow_assignable()</span>
<span id="L786"><span class="lineNum"> 786</span> : {</span>
<span id="L787"><span class="lineNum"> 787</span> : return</span>
<span id="L788"><span class="lineNum"> 788</span> : __and_&lt;is_nothrow_assignable&lt;_Elements&amp;, _UElements&gt;...&gt;::value;</span>
<span id="L789"><span class="lineNum"> 789</span> : }</span>
<span id="L790"><span class="lineNum"> 790</span> : </span>
<span id="L791"><span class="lineNum"> 791</span> : // Condition for noexcept-specifier of a constructor.</span>
<span id="L792"><span class="lineNum"> 792</span> : template&lt;typename... _UElements&gt;</span>
<span id="L793"><span class="lineNum"> 793</span> : static constexpr bool __nothrow_constructible()</span>
<span id="L794"><span class="lineNum"> 794</span> : {</span>
<span id="L795"><span class="lineNum"> 795</span> : return</span>
<span id="L796"><span class="lineNum"> 796</span> : __and_&lt;is_nothrow_constructible&lt;_Elements, _UElements&gt;...&gt;::value;</span>
<span id="L797"><span class="lineNum"> 797</span> : }</span>
<span id="L798"><span class="lineNum"> 798</span> : </span>
<span id="L799"><span class="lineNum"> 799</span> : // Constraint for tuple(_UTypes&amp;&amp;...) where sizeof...(_UTypes) == 1.</span>
<span id="L800"><span class="lineNum"> 800</span> : template&lt;typename _Up&gt;</span>
<span id="L801"><span class="lineNum"> 801</span> : static constexpr bool __valid_args()</span>
<span id="L802"><span class="lineNum"> 802</span> : {</span>
<span id="L803"><span class="lineNum"> 803</span> : return sizeof...(_Elements) == 1</span>
<span id="L804"><span class="lineNum"> 804</span> : &amp;&amp; !is_same&lt;tuple, __remove_cvref_t&lt;_Up&gt;&gt;::value;</span>
<span id="L805"><span class="lineNum"> 805</span> : }</span>
<span id="L806"><span class="lineNum"> 806</span> : </span>
<span id="L807"><span class="lineNum"> 807</span> : // Constraint for tuple(_UTypes&amp;&amp;...) where sizeof...(_UTypes) &gt; 1.</span>
<span id="L808"><span class="lineNum"> 808</span> : template&lt;typename, typename, typename... _Tail&gt;</span>
<span id="L809"><span class="lineNum"> 809</span> : static constexpr bool __valid_args()</span>
<span id="L810"><span class="lineNum"> 810</span> : { return (sizeof...(_Tail) + 2) == sizeof...(_Elements); }</span>
<span id="L811"><span class="lineNum"> 811</span> : </span>
<span id="L812"><span class="lineNum"> 812</span> : /* Constraint for constructors with a tuple&lt;UTypes...&gt; parameter ensures</span>
<span id="L813"><span class="lineNum"> 813</span> : * that the constructor is only viable when it would not interfere with</span>
<span id="L814"><span class="lineNum"> 814</span> : * tuple(UTypes&amp;&amp;...) or tuple(const tuple&amp;) or tuple(tuple&amp;&amp;).</span>
<span id="L815"><span class="lineNum"> 815</span> : * Such constructors are only viable if:</span>
<span id="L816"><span class="lineNum"> 816</span> : * either sizeof...(Types) != 1,</span>
<span id="L817"><span class="lineNum"> 817</span> : * or (when Types... expands to T and UTypes... expands to U)</span>
<span id="L818"><span class="lineNum"> 818</span> : * is_convertible_v&lt;TUPLE, T&gt;, is_constructible_v&lt;T, TUPLE&gt;,</span>
<span id="L819"><span class="lineNum"> 819</span> : * and is_same_v&lt;T, U&gt; are all false.</span>
<span id="L820"><span class="lineNum"> 820</span> : */</span>
<span id="L821"><span class="lineNum"> 821</span> : template&lt;typename _Tuple, typename = tuple,</span>
<span id="L822"><span class="lineNum"> 822</span> : typename = __remove_cvref_t&lt;_Tuple&gt;&gt;</span>
<span id="L823"><span class="lineNum"> 823</span> : struct _UseOtherCtor</span>
<span id="L824"><span class="lineNum"> 824</span> : : false_type</span>
<span id="L825"><span class="lineNum"> 825</span> : { };</span>
<span id="L826"><span class="lineNum"> 826</span> : // If TUPLE is convertible to the single element in *this,</span>
<span id="L827"><span class="lineNum"> 827</span> : // then TUPLE should match tuple(UTypes&amp;&amp;...) instead.</span>
<span id="L828"><span class="lineNum"> 828</span> : template&lt;typename _Tuple, typename _Tp, typename _Up&gt;</span>
<span id="L829"><span class="lineNum"> 829</span> : struct _UseOtherCtor&lt;_Tuple, tuple&lt;_Tp&gt;, tuple&lt;_Up&gt;&gt;</span>
<span id="L830"><span class="lineNum"> 830</span> : : __or_&lt;is_convertible&lt;_Tuple, _Tp&gt;, is_constructible&lt;_Tp, _Tuple&gt;&gt;::type</span>
<span id="L831"><span class="lineNum"> 831</span> : { };</span>
<span id="L832"><span class="lineNum"> 832</span> : // If TUPLE and *this each have a single element of the same type,</span>
<span id="L833"><span class="lineNum"> 833</span> : // then TUPLE should match a copy/move constructor instead.</span>
<span id="L834"><span class="lineNum"> 834</span> : template&lt;typename _Tuple, typename _Tp&gt;</span>
<span id="L835"><span class="lineNum"> 835</span> : struct _UseOtherCtor&lt;_Tuple, tuple&lt;_Tp&gt;, tuple&lt;_Tp&gt;&gt;</span>
<span id="L836"><span class="lineNum"> 836</span> : : true_type</span>
<span id="L837"><span class="lineNum"> 837</span> : { };</span>
<span id="L838"><span class="lineNum"> 838</span> : </span>
<span id="L839"><span class="lineNum"> 839</span> : // Return true iff sizeof...(Types) == 1 &amp;&amp; tuple_size_v&lt;TUPLE&gt; == 1</span>
<span id="L840"><span class="lineNum"> 840</span> : // and the single element in Types can be initialized from TUPLE,</span>
<span id="L841"><span class="lineNum"> 841</span> : // or is the same type as tuple_element_t&lt;0, TUPLE&gt;.</span>
<span id="L842"><span class="lineNum"> 842</span> : template&lt;typename _Tuple&gt;</span>
<span id="L843"><span class="lineNum"> 843</span> : static constexpr bool __use_other_ctor()</span>
<span id="L844"><span class="lineNum"> 844</span> : { return _UseOtherCtor&lt;_Tuple&gt;::value; }</span>
<span id="L845"><span class="lineNum"> 845</span> : </span>
<span id="L846"><span class="lineNum"> 846</span> : #if __cplusplus &gt; 202002L</span>
<span id="L847"><span class="lineNum"> 847</span> : template&lt;typename... _Args&gt;</span>
<span id="L848"><span class="lineNum"> 848</span> : static constexpr bool __constructible</span>
<span id="L849"><span class="lineNum"> 849</span> : = _TCC&lt;true&gt;::template __constructible&lt;_Args...&gt;::value;</span>
<span id="L850"><span class="lineNum"> 850</span> : </span>
<span id="L851"><span class="lineNum"> 851</span> : template&lt;typename... _Args&gt;</span>
<span id="L852"><span class="lineNum"> 852</span> : static constexpr bool __convertible</span>
<span id="L853"><span class="lineNum"> 853</span> : = _TCC&lt;true&gt;::template __convertible&lt;_Args...&gt;::value;</span>
<span id="L854"><span class="lineNum"> 854</span> : #endif // C++23</span>
<span id="L855"><span class="lineNum"> 855</span> : </span>
<span id="L856"><span class="lineNum"> 856</span> : public:</span>
<span id="L857"><span class="lineNum"> 857</span> : template&lt;typename _Dummy = void,</span>
<span id="L858"><span class="lineNum"> 858</span> : _ImplicitDefaultCtor&lt;is_void&lt;_Dummy&gt;::value&gt; = true&gt;</span>
<span id="L859"><span class="lineNum"> 859</span> : constexpr</span>
<span id="L860"><span class="lineNum"> 860</span> : tuple()</span>
<span id="L861"><span class="lineNum"> 861</span> : noexcept(__and_&lt;is_nothrow_default_constructible&lt;_Elements&gt;...&gt;::value)</span>
<span id="L862"><span class="lineNum"> 862</span> : : _Inherited() { }</span>
<span id="L863"><span class="lineNum"> 863</span> : </span>
<span id="L864"><span class="lineNum"> 864</span> : template&lt;typename _Dummy = void,</span>
<span id="L865"><span class="lineNum"> 865</span> : _ExplicitDefaultCtor&lt;is_void&lt;_Dummy&gt;::value&gt; = false&gt;</span>
<span id="L866"><span class="lineNum"> 866</span> : explicit constexpr</span>
<span id="L867"><span class="lineNum"> 867</span> : tuple()</span>
<span id="L868"><span class="lineNum"> 868</span> : noexcept(__and_&lt;is_nothrow_default_constructible&lt;_Elements&gt;...&gt;::value)</span>
<span id="L869"><span class="lineNum"> 869</span> : : _Inherited() { }</span>
<span id="L870"><span class="lineNum"> 870</span> : </span>
<span id="L871"><span class="lineNum"> 871</span> : template&lt;bool _NotEmpty = (sizeof...(_Elements) &gt;= 1),</span>
<span id="L872"><span class="lineNum"> 872</span> : _ImplicitCtor&lt;_NotEmpty, const _Elements&amp;...&gt; = true&gt;</span>
<span id="L873"><span class="lineNum"> 873</span> : constexpr</span>
<span id="L874"><span class="lineNum"> 874</span> <span class="tlaGNC"> 8756886 : tuple(const _Elements&amp;... __elements)</span></span>
<span id="L875"><span class="lineNum"> 875</span> : noexcept(__nothrow_constructible&lt;const _Elements&amp;...&gt;())</span>
<span id="L876"><span class="lineNum"> 876</span> <span class="tlaGNC"> 8756886 : : _Inherited(__elements...) { }</span></span>
<span id="L877"><span class="lineNum"> 877</span> : </span>
<span id="L878"><span class="lineNum"> 878</span> : template&lt;bool _NotEmpty = (sizeof...(_Elements) &gt;= 1),</span>
<span id="L879"><span class="lineNum"> 879</span> : _ExplicitCtor&lt;_NotEmpty, const _Elements&amp;...&gt; = false&gt;</span>
<span id="L880"><span class="lineNum"> 880</span> : explicit constexpr</span>
<span id="L881"><span class="lineNum"> 881</span> : tuple(const _Elements&amp;... __elements)</span>
<span id="L882"><span class="lineNum"> 882</span> : noexcept(__nothrow_constructible&lt;const _Elements&amp;...&gt;())</span>
<span id="L883"><span class="lineNum"> 883</span> : : _Inherited(__elements...) { }</span>
<span id="L884"><span class="lineNum"> 884</span> : </span>
<span id="L885"><span class="lineNum"> 885</span> : template&lt;typename... _UElements,</span>
<span id="L886"><span class="lineNum"> 886</span> : bool _Valid = __valid_args&lt;_UElements...&gt;(),</span>
<span id="L887"><span class="lineNum"> 887</span> : _ImplicitCtor&lt;_Valid, _UElements...&gt; = true&gt;</span>
<span id="L888"><span class="lineNum"> 888</span> : constexpr</span>
<span id="L889"><span class="lineNum"> 889</span> <span class="tlaGNC"> 4735376 : tuple(_UElements&amp;&amp;... __elements)</span></span>
<span id="L890"><span class="lineNum"> 890</span> : noexcept(__nothrow_constructible&lt;_UElements...&gt;())</span>
<span id="L891"><span class="lineNum"> 891</span> <span class="tlaGNC"> 4735376 : : _Inherited(std::forward&lt;_UElements&gt;(__elements)...) { }</span></span>
<span id="L892"><span class="lineNum"> 892</span> : </span>
<span id="L893"><span class="lineNum"> 893</span> : template&lt;typename... _UElements,</span>
<span id="L894"><span class="lineNum"> 894</span> : bool _Valid = __valid_args&lt;_UElements...&gt;(),</span>
<span id="L895"><span class="lineNum"> 895</span> : _ExplicitCtor&lt;_Valid, _UElements...&gt; = false&gt;</span>
<span id="L896"><span class="lineNum"> 896</span> : explicit constexpr</span>
<span id="L897"><span class="lineNum"> 897</span> : tuple(_UElements&amp;&amp;... __elements)</span>
<span id="L898"><span class="lineNum"> 898</span> : noexcept(__nothrow_constructible&lt;_UElements...&gt;())</span>
<span id="L899"><span class="lineNum"> 899</span> : : _Inherited(std::forward&lt;_UElements&gt;(__elements)...) { }</span>
<span id="L900"><span class="lineNum"> 900</span> : </span>
<span id="L901"><span class="lineNum"> 901</span> : constexpr tuple(const tuple&amp;) = default;</span>
<span id="L902"><span class="lineNum"> 902</span> : </span>
<span id="L903"><span class="lineNum"> 903</span> <span class="tlaGNC"> 11885956 : constexpr tuple(tuple&amp;&amp;) = default;</span></span>
<span id="L904"><span class="lineNum"> 904</span> : </span>
<span id="L905"><span class="lineNum"> 905</span> : template&lt;typename... _UElements,</span>
<span id="L906"><span class="lineNum"> 906</span> : bool _Valid = (sizeof...(_Elements) == sizeof...(_UElements))</span>
<span id="L907"><span class="lineNum"> 907</span> : &amp;&amp; !__use_other_ctor&lt;const tuple&lt;_UElements...&gt;&amp;&gt;(),</span>
<span id="L908"><span class="lineNum"> 908</span> : _ImplicitCtor&lt;_Valid, const _UElements&amp;...&gt; = true&gt;</span>
<span id="L909"><span class="lineNum"> 909</span> : constexpr</span>
<span id="L910"><span class="lineNum"> 910</span> : tuple(const tuple&lt;_UElements...&gt;&amp; __in)</span>
<span id="L911"><span class="lineNum"> 911</span> : noexcept(__nothrow_constructible&lt;const _UElements&amp;...&gt;())</span>
<span id="L912"><span class="lineNum"> 912</span> : : _Inherited(static_cast&lt;const _Tuple_impl&lt;0, _UElements...&gt;&amp;&gt;(__in))</span>
<span id="L913"><span class="lineNum"> 913</span> : { }</span>
<span id="L914"><span class="lineNum"> 914</span> : </span>
<span id="L915"><span class="lineNum"> 915</span> : template&lt;typename... _UElements,</span>
<span id="L916"><span class="lineNum"> 916</span> : bool _Valid = (sizeof...(_Elements) == sizeof...(_UElements))</span>
<span id="L917"><span class="lineNum"> 917</span> : &amp;&amp; !__use_other_ctor&lt;const tuple&lt;_UElements...&gt;&amp;&gt;(),</span>
<span id="L918"><span class="lineNum"> 918</span> : _ExplicitCtor&lt;_Valid, const _UElements&amp;...&gt; = false&gt;</span>
<span id="L919"><span class="lineNum"> 919</span> : explicit constexpr</span>
<span id="L920"><span class="lineNum"> 920</span> : tuple(const tuple&lt;_UElements...&gt;&amp; __in)</span>
<span id="L921"><span class="lineNum"> 921</span> : noexcept(__nothrow_constructible&lt;const _UElements&amp;...&gt;())</span>
<span id="L922"><span class="lineNum"> 922</span> : : _Inherited(static_cast&lt;const _Tuple_impl&lt;0, _UElements...&gt;&amp;&gt;(__in))</span>
<span id="L923"><span class="lineNum"> 923</span> : { }</span>
<span id="L924"><span class="lineNum"> 924</span> : </span>
<span id="L925"><span class="lineNum"> 925</span> : template&lt;typename... _UElements,</span>
<span id="L926"><span class="lineNum"> 926</span> : bool _Valid = (sizeof...(_Elements) == sizeof...(_UElements))</span>
<span id="L927"><span class="lineNum"> 927</span> : &amp;&amp; !__use_other_ctor&lt;tuple&lt;_UElements...&gt;&amp;&amp;&gt;(),</span>
<span id="L928"><span class="lineNum"> 928</span> : _ImplicitCtor&lt;_Valid, _UElements...&gt; = true&gt;</span>
<span id="L929"><span class="lineNum"> 929</span> : constexpr</span>
<span id="L930"><span class="lineNum"> 930</span> : tuple(tuple&lt;_UElements...&gt;&amp;&amp; __in)</span>
<span id="L931"><span class="lineNum"> 931</span> : noexcept(__nothrow_constructible&lt;_UElements...&gt;())</span>
<span id="L932"><span class="lineNum"> 932</span> : : _Inherited(static_cast&lt;_Tuple_impl&lt;0, _UElements...&gt;&amp;&amp;&gt;(__in)) { }</span>
<span id="L933"><span class="lineNum"> 933</span> : </span>
<span id="L934"><span class="lineNum"> 934</span> : template&lt;typename... _UElements,</span>
<span id="L935"><span class="lineNum"> 935</span> : bool _Valid = (sizeof...(_Elements) == sizeof...(_UElements))</span>
<span id="L936"><span class="lineNum"> 936</span> : &amp;&amp; !__use_other_ctor&lt;tuple&lt;_UElements...&gt;&amp;&amp;&gt;(),</span>
<span id="L937"><span class="lineNum"> 937</span> : _ExplicitCtor&lt;_Valid, _UElements...&gt; = false&gt;</span>
<span id="L938"><span class="lineNum"> 938</span> : explicit constexpr</span>
<span id="L939"><span class="lineNum"> 939</span> : tuple(tuple&lt;_UElements...&gt;&amp;&amp; __in)</span>
<span id="L940"><span class="lineNum"> 940</span> : noexcept(__nothrow_constructible&lt;_UElements...&gt;())</span>
<span id="L941"><span class="lineNum"> 941</span> : : _Inherited(static_cast&lt;_Tuple_impl&lt;0, _UElements...&gt;&amp;&amp;&gt;(__in)) { }</span>
<span id="L942"><span class="lineNum"> 942</span> : </span>
<span id="L943"><span class="lineNum"> 943</span> : #if __cplusplus &gt; 202002L</span>
<span id="L944"><span class="lineNum"> 944</span> : template&lt;typename... _UElements&gt;</span>
<span id="L945"><span class="lineNum"> 945</span> : requires (sizeof...(_Elements) == sizeof...(_UElements))</span>
<span id="L946"><span class="lineNum"> 946</span> : &amp;&amp; (!__use_other_ctor&lt;tuple&lt;_UElements...&gt;&amp;&gt;())</span>
<span id="L947"><span class="lineNum"> 947</span> : &amp;&amp; __constructible&lt;_UElements&amp;...&gt;</span>
<span id="L948"><span class="lineNum"> 948</span> : explicit(!__convertible&lt;_UElements&amp;...&gt;)</span>
<span id="L949"><span class="lineNum"> 949</span> : constexpr</span>
<span id="L950"><span class="lineNum"> 950</span> : tuple(tuple&lt;_UElements...&gt;&amp; __in)</span>
<span id="L951"><span class="lineNum"> 951</span> : noexcept(__nothrow_constructible&lt;_UElements&amp;...&gt;())</span>
<span id="L952"><span class="lineNum"> 952</span> : : _Inherited(static_cast&lt;_Tuple_impl&lt;0, _UElements...&gt;&amp;&gt;(__in))</span>
<span id="L953"><span class="lineNum"> 953</span> : { }</span>
<span id="L954"><span class="lineNum"> 954</span> : </span>
<span id="L955"><span class="lineNum"> 955</span> : template&lt;typename... _UElements&gt;</span>
<span id="L956"><span class="lineNum"> 956</span> : requires (sizeof...(_Elements) == sizeof...(_UElements))</span>
<span id="L957"><span class="lineNum"> 957</span> : &amp;&amp; (!__use_other_ctor&lt;const tuple&lt;_UElements...&gt;&amp;&amp;&gt;())</span>
<span id="L958"><span class="lineNum"> 958</span> : &amp;&amp; __constructible&lt;const _UElements...&gt;</span>
<span id="L959"><span class="lineNum"> 959</span> : explicit(!__convertible&lt;const _UElements...&gt;)</span>
<span id="L960"><span class="lineNum"> 960</span> : constexpr</span>
<span id="L961"><span class="lineNum"> 961</span> : tuple(const tuple&lt;_UElements...&gt;&amp;&amp; __in)</span>
<span id="L962"><span class="lineNum"> 962</span> : noexcept(__nothrow_constructible&lt;const _UElements...&gt;())</span>
<span id="L963"><span class="lineNum"> 963</span> : : _Inherited(static_cast&lt;const _Tuple_impl&lt;0, _UElements...&gt;&amp;&amp;&gt;(__in)) { }</span>
<span id="L964"><span class="lineNum"> 964</span> : #endif // C++23</span>
<span id="L965"><span class="lineNum"> 965</span> : </span>
<span id="L966"><span class="lineNum"> 966</span> : // Allocator-extended constructors.</span>
<span id="L967"><span class="lineNum"> 967</span> : </span>
<span id="L968"><span class="lineNum"> 968</span> : template&lt;typename _Alloc,</span>
<span id="L969"><span class="lineNum"> 969</span> : _ImplicitDefaultCtor&lt;is_object&lt;_Alloc&gt;::value&gt; = true&gt;</span>
<span id="L970"><span class="lineNum"> 970</span> : _GLIBCXX20_CONSTEXPR</span>
<span id="L971"><span class="lineNum"> 971</span> : tuple(allocator_arg_t __tag, const _Alloc&amp; __a)</span>
<span id="L972"><span class="lineNum"> 972</span> : : _Inherited(__tag, __a) { }</span>
<span id="L973"><span class="lineNum"> 973</span> : </span>
<span id="L974"><span class="lineNum"> 974</span> : template&lt;typename _Alloc, bool _NotEmpty = (sizeof...(_Elements) &gt;= 1),</span>
<span id="L975"><span class="lineNum"> 975</span> : _ImplicitCtor&lt;_NotEmpty, const _Elements&amp;...&gt; = true&gt;</span>
<span id="L976"><span class="lineNum"> 976</span> : _GLIBCXX20_CONSTEXPR</span>
<span id="L977"><span class="lineNum"> 977</span> : tuple(allocator_arg_t __tag, const _Alloc&amp; __a,</span>
<span id="L978"><span class="lineNum"> 978</span> : const _Elements&amp;... __elements)</span>
<span id="L979"><span class="lineNum"> 979</span> : : _Inherited(__tag, __a, __elements...) { }</span>
<span id="L980"><span class="lineNum"> 980</span> : </span>
<span id="L981"><span class="lineNum"> 981</span> : template&lt;typename _Alloc, bool _NotEmpty = (sizeof...(_Elements) &gt;= 1),</span>
<span id="L982"><span class="lineNum"> 982</span> : _ExplicitCtor&lt;_NotEmpty, const _Elements&amp;...&gt; = false&gt;</span>
<span id="L983"><span class="lineNum"> 983</span> : _GLIBCXX20_CONSTEXPR</span>
<span id="L984"><span class="lineNum"> 984</span> : explicit</span>
<span id="L985"><span class="lineNum"> 985</span> : tuple(allocator_arg_t __tag, const _Alloc&amp; __a,</span>
<span id="L986"><span class="lineNum"> 986</span> : const _Elements&amp;... __elements)</span>
<span id="L987"><span class="lineNum"> 987</span> : : _Inherited(__tag, __a, __elements...) { }</span>
<span id="L988"><span class="lineNum"> 988</span> : </span>
<span id="L989"><span class="lineNum"> 989</span> : template&lt;typename _Alloc, typename... _UElements,</span>
<span id="L990"><span class="lineNum"> 990</span> : bool _Valid = __valid_args&lt;_UElements...&gt;(),</span>
<span id="L991"><span class="lineNum"> 991</span> : _ImplicitCtor&lt;_Valid, _UElements...&gt; = true&gt;</span>
<span id="L992"><span class="lineNum"> 992</span> : _GLIBCXX20_CONSTEXPR</span>
<span id="L993"><span class="lineNum"> 993</span> : tuple(allocator_arg_t __tag, const _Alloc&amp; __a,</span>
<span id="L994"><span class="lineNum"> 994</span> : _UElements&amp;&amp;... __elements)</span>
<span id="L995"><span class="lineNum"> 995</span> : : _Inherited(__tag, __a, std::forward&lt;_UElements&gt;(__elements)...)</span>
<span id="L996"><span class="lineNum"> 996</span> : { }</span>
<span id="L997"><span class="lineNum"> 997</span> : </span>
<span id="L998"><span class="lineNum"> 998</span> : template&lt;typename _Alloc, typename... _UElements,</span>
<span id="L999"><span class="lineNum"> 999</span> : bool _Valid = __valid_args&lt;_UElements...&gt;(),</span>
<span id="L1000"><span class="lineNum"> 1000</span> : _ExplicitCtor&lt;_Valid, _UElements...&gt; = false&gt;</span>
<span id="L1001"><span class="lineNum"> 1001</span> : _GLIBCXX20_CONSTEXPR</span>
<span id="L1002"><span class="lineNum"> 1002</span> : explicit</span>
<span id="L1003"><span class="lineNum"> 1003</span> : tuple(allocator_arg_t __tag, const _Alloc&amp; __a,</span>
<span id="L1004"><span class="lineNum"> 1004</span> : _UElements&amp;&amp;... __elements)</span>
<span id="L1005"><span class="lineNum"> 1005</span> : : _Inherited(__tag, __a, std::forward&lt;_UElements&gt;(__elements)...)</span>
<span id="L1006"><span class="lineNum"> 1006</span> : { }</span>
<span id="L1007"><span class="lineNum"> 1007</span> : </span>
<span id="L1008"><span class="lineNum"> 1008</span> : template&lt;typename _Alloc&gt;</span>
<span id="L1009"><span class="lineNum"> 1009</span> : _GLIBCXX20_CONSTEXPR</span>
<span id="L1010"><span class="lineNum"> 1010</span> : tuple(allocator_arg_t __tag, const _Alloc&amp; __a, const tuple&amp; __in)</span>
<span id="L1011"><span class="lineNum"> 1011</span> : : _Inherited(__tag, __a, static_cast&lt;const _Inherited&amp;&gt;(__in)) { }</span>
<span id="L1012"><span class="lineNum"> 1012</span> : </span>
<span id="L1013"><span class="lineNum"> 1013</span> : template&lt;typename _Alloc&gt;</span>
<span id="L1014"><span class="lineNum"> 1014</span> : _GLIBCXX20_CONSTEXPR</span>
<span id="L1015"><span class="lineNum"> 1015</span> : tuple(allocator_arg_t __tag, const _Alloc&amp; __a, tuple&amp;&amp; __in)</span>
<span id="L1016"><span class="lineNum"> 1016</span> : : _Inherited(__tag, __a, static_cast&lt;_Inherited&amp;&amp;&gt;(__in)) { }</span>
<span id="L1017"><span class="lineNum"> 1017</span> : </span>
<span id="L1018"><span class="lineNum"> 1018</span> : template&lt;typename _Alloc, typename... _UElements,</span>
<span id="L1019"><span class="lineNum"> 1019</span> : bool _Valid = (sizeof...(_Elements) == sizeof...(_UElements))</span>
<span id="L1020"><span class="lineNum"> 1020</span> : &amp;&amp; !__use_other_ctor&lt;const tuple&lt;_UElements...&gt;&amp;&gt;(),</span>
<span id="L1021"><span class="lineNum"> 1021</span> : _ImplicitCtor&lt;_Valid, const _UElements&amp;...&gt; = true&gt;</span>
<span id="L1022"><span class="lineNum"> 1022</span> : _GLIBCXX20_CONSTEXPR</span>
<span id="L1023"><span class="lineNum"> 1023</span> : tuple(allocator_arg_t __tag, const _Alloc&amp; __a,</span>
<span id="L1024"><span class="lineNum"> 1024</span> : const tuple&lt;_UElements...&gt;&amp; __in)</span>
<span id="L1025"><span class="lineNum"> 1025</span> : : _Inherited(__tag, __a,</span>
<span id="L1026"><span class="lineNum"> 1026</span> : static_cast&lt;const _Tuple_impl&lt;0, _UElements...&gt;&amp;&gt;(__in))</span>
<span id="L1027"><span class="lineNum"> 1027</span> : { }</span>
<span id="L1028"><span class="lineNum"> 1028</span> : </span>
<span id="L1029"><span class="lineNum"> 1029</span> : template&lt;typename _Alloc, typename... _UElements,</span>
<span id="L1030"><span class="lineNum"> 1030</span> : bool _Valid = (sizeof...(_Elements) == sizeof...(_UElements))</span>
<span id="L1031"><span class="lineNum"> 1031</span> : &amp;&amp; !__use_other_ctor&lt;const tuple&lt;_UElements...&gt;&amp;&gt;(),</span>
<span id="L1032"><span class="lineNum"> 1032</span> : _ExplicitCtor&lt;_Valid, const _UElements&amp;...&gt; = false&gt;</span>
<span id="L1033"><span class="lineNum"> 1033</span> : _GLIBCXX20_CONSTEXPR</span>
<span id="L1034"><span class="lineNum"> 1034</span> : explicit</span>
<span id="L1035"><span class="lineNum"> 1035</span> : tuple(allocator_arg_t __tag, const _Alloc&amp; __a,</span>
<span id="L1036"><span class="lineNum"> 1036</span> : const tuple&lt;_UElements...&gt;&amp; __in)</span>
<span id="L1037"><span class="lineNum"> 1037</span> : : _Inherited(__tag, __a,</span>
<span id="L1038"><span class="lineNum"> 1038</span> : static_cast&lt;const _Tuple_impl&lt;0, _UElements...&gt;&amp;&gt;(__in))</span>
<span id="L1039"><span class="lineNum"> 1039</span> : { }</span>
<span id="L1040"><span class="lineNum"> 1040</span> : </span>
<span id="L1041"><span class="lineNum"> 1041</span> : template&lt;typename _Alloc, typename... _UElements,</span>
<span id="L1042"><span class="lineNum"> 1042</span> : bool _Valid = (sizeof...(_Elements) == sizeof...(_UElements))</span>
<span id="L1043"><span class="lineNum"> 1043</span> : &amp;&amp; !__use_other_ctor&lt;tuple&lt;_UElements...&gt;&amp;&amp;&gt;(),</span>
<span id="L1044"><span class="lineNum"> 1044</span> : _ImplicitCtor&lt;_Valid, _UElements...&gt; = true&gt;</span>
<span id="L1045"><span class="lineNum"> 1045</span> : _GLIBCXX20_CONSTEXPR</span>
<span id="L1046"><span class="lineNum"> 1046</span> : tuple(allocator_arg_t __tag, const _Alloc&amp; __a,</span>
<span id="L1047"><span class="lineNum"> 1047</span> : tuple&lt;_UElements...&gt;&amp;&amp; __in)</span>
<span id="L1048"><span class="lineNum"> 1048</span> : : _Inherited(__tag, __a,</span>
<span id="L1049"><span class="lineNum"> 1049</span> : static_cast&lt;_Tuple_impl&lt;0, _UElements...&gt;&amp;&amp;&gt;(__in))</span>
<span id="L1050"><span class="lineNum"> 1050</span> : { }</span>
<span id="L1051"><span class="lineNum"> 1051</span> : </span>
<span id="L1052"><span class="lineNum"> 1052</span> : template&lt;typename _Alloc, typename... _UElements,</span>
<span id="L1053"><span class="lineNum"> 1053</span> : bool _Valid = (sizeof...(_Elements) == sizeof...(_UElements))</span>
<span id="L1054"><span class="lineNum"> 1054</span> : &amp;&amp; !__use_other_ctor&lt;tuple&lt;_UElements...&gt;&amp;&amp;&gt;(),</span>
<span id="L1055"><span class="lineNum"> 1055</span> : _ExplicitCtor&lt;_Valid, _UElements...&gt; = false&gt;</span>
<span id="L1056"><span class="lineNum"> 1056</span> : _GLIBCXX20_CONSTEXPR</span>
<span id="L1057"><span class="lineNum"> 1057</span> : explicit</span>
<span id="L1058"><span class="lineNum"> 1058</span> : tuple(allocator_arg_t __tag, const _Alloc&amp; __a,</span>
<span id="L1059"><span class="lineNum"> 1059</span> : tuple&lt;_UElements...&gt;&amp;&amp; __in)</span>
<span id="L1060"><span class="lineNum"> 1060</span> : : _Inherited(__tag, __a,</span>
<span id="L1061"><span class="lineNum"> 1061</span> : static_cast&lt;_Tuple_impl&lt;0, _UElements...&gt;&amp;&amp;&gt;(__in))</span>
<span id="L1062"><span class="lineNum"> 1062</span> : { }</span>
<span id="L1063"><span class="lineNum"> 1063</span> : </span>
<span id="L1064"><span class="lineNum"> 1064</span> : #if __cplusplus &gt; 202002L</span>
<span id="L1065"><span class="lineNum"> 1065</span> : template&lt;typename _Alloc, typename... _UElements&gt;</span>
<span id="L1066"><span class="lineNum"> 1066</span> : requires (sizeof...(_Elements) == sizeof...(_UElements))</span>
<span id="L1067"><span class="lineNum"> 1067</span> : &amp;&amp; (!__use_other_ctor&lt;tuple&lt;_UElements...&gt;&amp;&gt;())</span>
<span id="L1068"><span class="lineNum"> 1068</span> : &amp;&amp; __constructible&lt;_UElements&amp;...&gt;</span>
<span id="L1069"><span class="lineNum"> 1069</span> : explicit(!__convertible&lt;_UElements&amp;...&gt;)</span>
<span id="L1070"><span class="lineNum"> 1070</span> : constexpr</span>
<span id="L1071"><span class="lineNum"> 1071</span> : tuple(allocator_arg_t __tag, const _Alloc&amp; __a,</span>
<span id="L1072"><span class="lineNum"> 1072</span> : tuple&lt;_UElements...&gt;&amp; __in)</span>
<span id="L1073"><span class="lineNum"> 1073</span> : : _Inherited(__tag, __a,</span>
<span id="L1074"><span class="lineNum"> 1074</span> : static_cast&lt;_Tuple_impl&lt;0, _UElements...&gt;&amp;&gt;(__in))</span>
<span id="L1075"><span class="lineNum"> 1075</span> : { }</span>
<span id="L1076"><span class="lineNum"> 1076</span> : </span>
<span id="L1077"><span class="lineNum"> 1077</span> : template&lt;typename _Alloc, typename... _UElements&gt;</span>
<span id="L1078"><span class="lineNum"> 1078</span> : requires (sizeof...(_Elements) == sizeof...(_UElements))</span>
<span id="L1079"><span class="lineNum"> 1079</span> : &amp;&amp; (!__use_other_ctor&lt;const tuple&lt;_UElements...&gt;&gt;())</span>
<span id="L1080"><span class="lineNum"> 1080</span> : &amp;&amp; __constructible&lt;const _UElements...&gt;</span>
<span id="L1081"><span class="lineNum"> 1081</span> : explicit(!__convertible&lt;const _UElements...&gt;)</span>
<span id="L1082"><span class="lineNum"> 1082</span> : constexpr</span>
<span id="L1083"><span class="lineNum"> 1083</span> : tuple(allocator_arg_t __tag, const _Alloc&amp; __a,</span>
<span id="L1084"><span class="lineNum"> 1084</span> : const tuple&lt;_UElements...&gt;&amp;&amp; __in)</span>
<span id="L1085"><span class="lineNum"> 1085</span> : : _Inherited(__tag, __a,</span>
<span id="L1086"><span class="lineNum"> 1086</span> : static_cast&lt;const _Tuple_impl&lt;0, _UElements...&gt;&amp;&amp;&gt;(__in))</span>
<span id="L1087"><span class="lineNum"> 1087</span> : { }</span>
<span id="L1088"><span class="lineNum"> 1088</span> : #endif // C++23</span>
<span id="L1089"><span class="lineNum"> 1089</span> : </span>
<span id="L1090"><span class="lineNum"> 1090</span> : // tuple assignment</span>
<span id="L1091"><span class="lineNum"> 1091</span> : </span>
<span id="L1092"><span class="lineNum"> 1092</span> : _GLIBCXX20_CONSTEXPR</span>
<span id="L1093"><span class="lineNum"> 1093</span> : tuple&amp;</span>
<span id="L1094"><span class="lineNum"> 1094</span> : operator=(__conditional_t&lt;__assignable&lt;const _Elements&amp;...&gt;(),</span>
<span id="L1095"><span class="lineNum"> 1095</span> : const tuple&amp;,</span>
<span id="L1096"><span class="lineNum"> 1096</span> : const __nonesuch&amp;&gt; __in)</span>
<span id="L1097"><span class="lineNum"> 1097</span> : noexcept(__nothrow_assignable&lt;const _Elements&amp;...&gt;())</span>
<span id="L1098"><span class="lineNum"> 1098</span> : {</span>
<span id="L1099"><span class="lineNum"> 1099</span> : this-&gt;_M_assign(__in);</span>
<span id="L1100"><span class="lineNum"> 1100</span> : return *this;</span>
<span id="L1101"><span class="lineNum"> 1101</span> : }</span>
<span id="L1102"><span class="lineNum"> 1102</span> : </span>
<span id="L1103"><span class="lineNum"> 1103</span> : _GLIBCXX20_CONSTEXPR</span>
<span id="L1104"><span class="lineNum"> 1104</span> : tuple&amp;</span>
<span id="L1105"><span class="lineNum"> 1105</span> : operator=(__conditional_t&lt;__assignable&lt;_Elements...&gt;(),</span>
<span id="L1106"><span class="lineNum"> 1106</span> : tuple&amp;&amp;,</span>
<span id="L1107"><span class="lineNum"> 1107</span> : __nonesuch&amp;&amp;&gt; __in)</span>
<span id="L1108"><span class="lineNum"> 1108</span> : noexcept(__nothrow_assignable&lt;_Elements...&gt;())</span>
<span id="L1109"><span class="lineNum"> 1109</span> : {</span>
<span id="L1110"><span class="lineNum"> 1110</span> : this-&gt;_M_assign(std::move(__in));</span>
<span id="L1111"><span class="lineNum"> 1111</span> : return *this;</span>
<span id="L1112"><span class="lineNum"> 1112</span> : }</span>
<span id="L1113"><span class="lineNum"> 1113</span> : </span>
<span id="L1114"><span class="lineNum"> 1114</span> : template&lt;typename... _UElements&gt;</span>
<span id="L1115"><span class="lineNum"> 1115</span> : _GLIBCXX20_CONSTEXPR</span>
<span id="L1116"><span class="lineNum"> 1116</span> : __enable_if_t&lt;__assignable&lt;const _UElements&amp;...&gt;(), tuple&amp;&gt;</span>
<span id="L1117"><span class="lineNum"> 1117</span> : operator=(const tuple&lt;_UElements...&gt;&amp; __in)</span>
<span id="L1118"><span class="lineNum"> 1118</span> : noexcept(__nothrow_assignable&lt;const _UElements&amp;...&gt;())</span>
<span id="L1119"><span class="lineNum"> 1119</span> : {</span>
<span id="L1120"><span class="lineNum"> 1120</span> : this-&gt;_M_assign(__in);</span>
<span id="L1121"><span class="lineNum"> 1121</span> : return *this;</span>
<span id="L1122"><span class="lineNum"> 1122</span> : }</span>
<span id="L1123"><span class="lineNum"> 1123</span> : </span>
<span id="L1124"><span class="lineNum"> 1124</span> : template&lt;typename... _UElements&gt;</span>
<span id="L1125"><span class="lineNum"> 1125</span> : _GLIBCXX20_CONSTEXPR</span>
<span id="L1126"><span class="lineNum"> 1126</span> : __enable_if_t&lt;__assignable&lt;_UElements...&gt;(), tuple&amp;&gt;</span>
<span id="L1127"><span class="lineNum"> 1127</span> <span class="tlaGNC"> 286 : operator=(tuple&lt;_UElements...&gt;&amp;&amp; __in)</span></span>
<span id="L1128"><span class="lineNum"> 1128</span> : noexcept(__nothrow_assignable&lt;_UElements...&gt;())</span>
<span id="L1129"><span class="lineNum"> 1129</span> : {</span>
<span id="L1130"><span class="lineNum"> 1130</span> <span class="tlaGNC"> 286 : this-&gt;_M_assign(std::move(__in));</span></span>
<span id="L1131"><span class="lineNum"> 1131</span> <span class="tlaGNC"> 286 : return *this;</span></span>
<span id="L1132"><span class="lineNum"> 1132</span> : }</span>
<span id="L1133"><span class="lineNum"> 1133</span> : </span>
<span id="L1134"><span class="lineNum"> 1134</span> : #if __cplusplus &gt; 202002L</span>
<span id="L1135"><span class="lineNum"> 1135</span> : constexpr const tuple&amp;</span>
<span id="L1136"><span class="lineNum"> 1136</span> : operator=(const tuple&amp; __in) const</span>
<span id="L1137"><span class="lineNum"> 1137</span> : requires (is_copy_assignable_v&lt;const _Elements&gt; &amp;&amp; ...)</span>
<span id="L1138"><span class="lineNum"> 1138</span> : {</span>
<span id="L1139"><span class="lineNum"> 1139</span> : this-&gt;_M_assign(__in);</span>
<span id="L1140"><span class="lineNum"> 1140</span> : return *this;</span>
<span id="L1141"><span class="lineNum"> 1141</span> : }</span>
<span id="L1142"><span class="lineNum"> 1142</span> : </span>
<span id="L1143"><span class="lineNum"> 1143</span> : constexpr const tuple&amp;</span>
<span id="L1144"><span class="lineNum"> 1144</span> : operator=(tuple&amp;&amp; __in) const</span>
<span id="L1145"><span class="lineNum"> 1145</span> : requires (is_assignable_v&lt;const _Elements&amp;, _Elements&gt; &amp;&amp; ...)</span>
<span id="L1146"><span class="lineNum"> 1146</span> : {</span>
<span id="L1147"><span class="lineNum"> 1147</span> : this-&gt;_M_assign(std::move(__in));</span>
<span id="L1148"><span class="lineNum"> 1148</span> : return *this;</span>
<span id="L1149"><span class="lineNum"> 1149</span> : }</span>
<span id="L1150"><span class="lineNum"> 1150</span> : </span>
<span id="L1151"><span class="lineNum"> 1151</span> : template&lt;typename... _UElements&gt;</span>
<span id="L1152"><span class="lineNum"> 1152</span> : constexpr const tuple&amp;</span>
<span id="L1153"><span class="lineNum"> 1153</span> : operator=(const tuple&lt;_UElements...&gt;&amp; __in) const</span>
<span id="L1154"><span class="lineNum"> 1154</span> : requires (sizeof...(_Elements) == sizeof...(_UElements))</span>
<span id="L1155"><span class="lineNum"> 1155</span> : &amp;&amp; (is_assignable_v&lt;const _Elements&amp;, const _UElements&amp;&gt; &amp;&amp; ...)</span>
<span id="L1156"><span class="lineNum"> 1156</span> : {</span>
<span id="L1157"><span class="lineNum"> 1157</span> : this-&gt;_M_assign(__in);</span>
<span id="L1158"><span class="lineNum"> 1158</span> : return *this;</span>
<span id="L1159"><span class="lineNum"> 1159</span> : }</span>
<span id="L1160"><span class="lineNum"> 1160</span> : </span>
<span id="L1161"><span class="lineNum"> 1161</span> : template&lt;typename... _UElements&gt;</span>
<span id="L1162"><span class="lineNum"> 1162</span> : constexpr const tuple&amp;</span>
<span id="L1163"><span class="lineNum"> 1163</span> : operator=(tuple&lt;_UElements...&gt;&amp;&amp; __in) const</span>
<span id="L1164"><span class="lineNum"> 1164</span> : requires (sizeof...(_Elements) == sizeof...(_UElements))</span>
<span id="L1165"><span class="lineNum"> 1165</span> : &amp;&amp; (is_assignable_v&lt;const _Elements&amp;, _UElements&gt; &amp;&amp; ...)</span>
<span id="L1166"><span class="lineNum"> 1166</span> : {</span>
<span id="L1167"><span class="lineNum"> 1167</span> : this-&gt;_M_assign(std::move(__in));</span>
<span id="L1168"><span class="lineNum"> 1168</span> : return *this;</span>
<span id="L1169"><span class="lineNum"> 1169</span> : }</span>
<span id="L1170"><span class="lineNum"> 1170</span> : #endif // C++23</span>
<span id="L1171"><span class="lineNum"> 1171</span> : </span>
<span id="L1172"><span class="lineNum"> 1172</span> : // tuple swap</span>
<span id="L1173"><span class="lineNum"> 1173</span> : _GLIBCXX20_CONSTEXPR</span>
<span id="L1174"><span class="lineNum"> 1174</span> : void</span>
<span id="L1175"><span class="lineNum"> 1175</span> : swap(tuple&amp; __in)</span>
<span id="L1176"><span class="lineNum"> 1176</span> : noexcept(__and_&lt;__is_nothrow_swappable&lt;_Elements&gt;...&gt;::value)</span>
<span id="L1177"><span class="lineNum"> 1177</span> : { _Inherited::_M_swap(__in); }</span>
<span id="L1178"><span class="lineNum"> 1178</span> : </span>
<span id="L1179"><span class="lineNum"> 1179</span> : #if __cplusplus &gt; 202002L</span>
<span id="L1180"><span class="lineNum"> 1180</span> : // As an extension, we constrain the const swap member function in order</span>
<span id="L1181"><span class="lineNum"> 1181</span> : // to continue accepting explicit instantiation of tuples whose elements</span>
<span id="L1182"><span class="lineNum"> 1182</span> : // are not all const swappable. Without this constraint, such an</span>
<span id="L1183"><span class="lineNum"> 1183</span> : // explicit instantiation would also instantiate the ill-formed body of</span>
<span id="L1184"><span class="lineNum"> 1184</span> : // this function and yield a hard error. This constraint shouldn't</span>
<span id="L1185"><span class="lineNum"> 1185</span> : // affect the behavior of valid programs.</span>
<span id="L1186"><span class="lineNum"> 1186</span> : constexpr void</span>
<span id="L1187"><span class="lineNum"> 1187</span> : swap(const tuple&amp; __in) const</span>
<span id="L1188"><span class="lineNum"> 1188</span> : noexcept(__and_v&lt;__is_nothrow_swappable&lt;const _Elements&gt;...&gt;)</span>
<span id="L1189"><span class="lineNum"> 1189</span> : requires (is_swappable_v&lt;const _Elements&gt; &amp;&amp; ...)</span>
<span id="L1190"><span class="lineNum"> 1190</span> : { _Inherited::_M_swap(__in); }</span>
<span id="L1191"><span class="lineNum"> 1191</span> : #endif // C++23</span>
<span id="L1192"><span class="lineNum"> 1192</span> : };</span>
<span id="L1193"><span class="lineNum"> 1193</span> : </span>
<span id="L1194"><span class="lineNum"> 1194</span> : #if __cpp_deduction_guides &gt;= 201606</span>
<span id="L1195"><span class="lineNum"> 1195</span> : template&lt;typename... _UTypes&gt;</span>
<span id="L1196"><span class="lineNum"> 1196</span> : tuple(_UTypes...) -&gt; tuple&lt;_UTypes...&gt;;</span>
<span id="L1197"><span class="lineNum"> 1197</span> : template&lt;typename _T1, typename _T2&gt;</span>
<span id="L1198"><span class="lineNum"> 1198</span> : tuple(pair&lt;_T1, _T2&gt;) -&gt; tuple&lt;_T1, _T2&gt;;</span>
<span id="L1199"><span class="lineNum"> 1199</span> : template&lt;typename _Alloc, typename... _UTypes&gt;</span>
<span id="L1200"><span class="lineNum"> 1200</span> : tuple(allocator_arg_t, _Alloc, _UTypes...) -&gt; tuple&lt;_UTypes...&gt;;</span>
<span id="L1201"><span class="lineNum"> 1201</span> : template&lt;typename _Alloc, typename _T1, typename _T2&gt;</span>
<span id="L1202"><span class="lineNum"> 1202</span> : tuple(allocator_arg_t, _Alloc, pair&lt;_T1, _T2&gt;) -&gt; tuple&lt;_T1, _T2&gt;;</span>
<span id="L1203"><span class="lineNum"> 1203</span> : template&lt;typename _Alloc, typename... _UTypes&gt;</span>
<span id="L1204"><span class="lineNum"> 1204</span> : tuple(allocator_arg_t, _Alloc, tuple&lt;_UTypes...&gt;) -&gt; tuple&lt;_UTypes...&gt;;</span>
<span id="L1205"><span class="lineNum"> 1205</span> : #endif</span>
<span id="L1206"><span class="lineNum"> 1206</span> : </span>
<span id="L1207"><span class="lineNum"> 1207</span> : // Explicit specialization, zero-element tuple.</span>
<span id="L1208"><span class="lineNum"> 1208</span> : template&lt;&gt;</span>
<span id="L1209"><span class="lineNum"> 1209</span> : class tuple&lt;&gt;</span>
<span id="L1210"><span class="lineNum"> 1210</span> : {</span>
<span id="L1211"><span class="lineNum"> 1211</span> : public:</span>
<span id="L1212"><span class="lineNum"> 1212</span> : _GLIBCXX20_CONSTEXPR</span>
<span id="L1213"><span class="lineNum"> 1213</span> : void swap(tuple&amp;) noexcept { /* no-op */ }</span>
<span id="L1214"><span class="lineNum"> 1214</span> : #if __cplusplus &gt; 202002L</span>
<span id="L1215"><span class="lineNum"> 1215</span> : constexpr void swap(const tuple&amp;) const noexcept { /* no-op */ }</span>
<span id="L1216"><span class="lineNum"> 1216</span> : #endif</span>
<span id="L1217"><span class="lineNum"> 1217</span> : // We need the default since we're going to define no-op</span>
<span id="L1218"><span class="lineNum"> 1218</span> : // allocator constructors.</span>
<span id="L1219"><span class="lineNum"> 1219</span> : tuple() = default;</span>
<span id="L1220"><span class="lineNum"> 1220</span> : // No-op allocator constructors.</span>
<span id="L1221"><span class="lineNum"> 1221</span> : template&lt;typename _Alloc&gt;</span>
<span id="L1222"><span class="lineNum"> 1222</span> : _GLIBCXX20_CONSTEXPR</span>
<span id="L1223"><span class="lineNum"> 1223</span> : tuple(allocator_arg_t, const _Alloc&amp;) noexcept { }</span>
<span id="L1224"><span class="lineNum"> 1224</span> : template&lt;typename _Alloc&gt;</span>
<span id="L1225"><span class="lineNum"> 1225</span> : _GLIBCXX20_CONSTEXPR</span>
<span id="L1226"><span class="lineNum"> 1226</span> : tuple(allocator_arg_t, const _Alloc&amp;, const tuple&amp;) noexcept { }</span>
<span id="L1227"><span class="lineNum"> 1227</span> : };</span>
<span id="L1228"><span class="lineNum"> 1228</span> : </span>
<span id="L1229"><span class="lineNum"> 1229</span> : /// Partial specialization, 2-element tuple.</span>
<span id="L1230"><span class="lineNum"> 1230</span> : /// Includes construction and assignment from a pair.</span>
<span id="L1231"><span class="lineNum"> 1231</span> : template&lt;typename _T1, typename _T2&gt;</span>
<span id="L1232"><span class="lineNum"> 1232</span> : class tuple&lt;_T1, _T2&gt; : public _Tuple_impl&lt;0, _T1, _T2&gt;</span>
<span id="L1233"><span class="lineNum"> 1233</span> : {</span>
<span id="L1234"><span class="lineNum"> 1234</span> : typedef _Tuple_impl&lt;0, _T1, _T2&gt; _Inherited;</span>
<span id="L1235"><span class="lineNum"> 1235</span> : </span>
<span id="L1236"><span class="lineNum"> 1236</span> : // Constraint for non-explicit default constructor</span>
<span id="L1237"><span class="lineNum"> 1237</span> : template&lt;bool _Dummy, typename _U1, typename _U2&gt;</span>
<span id="L1238"><span class="lineNum"> 1238</span> : using _ImplicitDefaultCtor = __enable_if_t&lt;</span>
<span id="L1239"><span class="lineNum"> 1239</span> : _TupleConstraints&lt;_Dummy, _U1, _U2&gt;::</span>
<span id="L1240"><span class="lineNum"> 1240</span> : __is_implicitly_default_constructible(),</span>
<span id="L1241"><span class="lineNum"> 1241</span> : bool&gt;;</span>
<span id="L1242"><span class="lineNum"> 1242</span> : </span>
<span id="L1243"><span class="lineNum"> 1243</span> : // Constraint for explicit default constructor</span>
<span id="L1244"><span class="lineNum"> 1244</span> : template&lt;bool _Dummy, typename _U1, typename _U2&gt;</span>
<span id="L1245"><span class="lineNum"> 1245</span> : using _ExplicitDefaultCtor = __enable_if_t&lt;</span>
<span id="L1246"><span class="lineNum"> 1246</span> : _TupleConstraints&lt;_Dummy, _U1, _U2&gt;::</span>
<span id="L1247"><span class="lineNum"> 1247</span> : __is_explicitly_default_constructible(),</span>
<span id="L1248"><span class="lineNum"> 1248</span> : bool&gt;;</span>
<span id="L1249"><span class="lineNum"> 1249</span> : </span>
<span id="L1250"><span class="lineNum"> 1250</span> : template&lt;bool _Dummy&gt;</span>
<span id="L1251"><span class="lineNum"> 1251</span> : using _TCC = _TupleConstraints&lt;_Dummy, _T1, _T2&gt;;</span>
<span id="L1252"><span class="lineNum"> 1252</span> : </span>
<span id="L1253"><span class="lineNum"> 1253</span> : // Constraint for non-explicit constructors</span>
<span id="L1254"><span class="lineNum"> 1254</span> : template&lt;bool _Cond, typename _U1, typename _U2&gt;</span>
<span id="L1255"><span class="lineNum"> 1255</span> : using _ImplicitCtor = __enable_if_t&lt;</span>
<span id="L1256"><span class="lineNum"> 1256</span> : _TCC&lt;_Cond&gt;::template __is_implicitly_constructible&lt;_U1, _U2&gt;(),</span>
<span id="L1257"><span class="lineNum"> 1257</span> : bool&gt;;</span>
<span id="L1258"><span class="lineNum"> 1258</span> : </span>
<span id="L1259"><span class="lineNum"> 1259</span> : // Constraint for non-explicit constructors</span>
<span id="L1260"><span class="lineNum"> 1260</span> : template&lt;bool _Cond, typename _U1, typename _U2&gt;</span>
<span id="L1261"><span class="lineNum"> 1261</span> : using _ExplicitCtor = __enable_if_t&lt;</span>
<span id="L1262"><span class="lineNum"> 1262</span> : _TCC&lt;_Cond&gt;::template __is_explicitly_constructible&lt;_U1, _U2&gt;(),</span>
<span id="L1263"><span class="lineNum"> 1263</span> : bool&gt;;</span>
<span id="L1264"><span class="lineNum"> 1264</span> : </span>
<span id="L1265"><span class="lineNum"> 1265</span> : template&lt;typename _U1, typename _U2&gt;</span>
<span id="L1266"><span class="lineNum"> 1266</span> : static constexpr bool __assignable()</span>
<span id="L1267"><span class="lineNum"> 1267</span> : {</span>
<span id="L1268"><span class="lineNum"> 1268</span> : return __and_&lt;is_assignable&lt;_T1&amp;, _U1&gt;,</span>
<span id="L1269"><span class="lineNum"> 1269</span> : is_assignable&lt;_T2&amp;, _U2&gt;&gt;::value;</span>
<span id="L1270"><span class="lineNum"> 1270</span> : }</span>
<span id="L1271"><span class="lineNum"> 1271</span> : </span>
<span id="L1272"><span class="lineNum"> 1272</span> : template&lt;typename _U1, typename _U2&gt;</span>
<span id="L1273"><span class="lineNum"> 1273</span> : static constexpr bool __nothrow_assignable()</span>
<span id="L1274"><span class="lineNum"> 1274</span> : {</span>
<span id="L1275"><span class="lineNum"> 1275</span> : return __and_&lt;is_nothrow_assignable&lt;_T1&amp;, _U1&gt;,</span>
<span id="L1276"><span class="lineNum"> 1276</span> : is_nothrow_assignable&lt;_T2&amp;, _U2&gt;&gt;::value;</span>
<span id="L1277"><span class="lineNum"> 1277</span> : }</span>
<span id="L1278"><span class="lineNum"> 1278</span> : </span>
<span id="L1279"><span class="lineNum"> 1279</span> : template&lt;typename _U1, typename _U2&gt;</span>
<span id="L1280"><span class="lineNum"> 1280</span> : static constexpr bool __nothrow_constructible()</span>
<span id="L1281"><span class="lineNum"> 1281</span> : {</span>
<span id="L1282"><span class="lineNum"> 1282</span> : return __and_&lt;is_nothrow_constructible&lt;_T1, _U1&gt;,</span>
<span id="L1283"><span class="lineNum"> 1283</span> : is_nothrow_constructible&lt;_T2, _U2&gt;&gt;::value;</span>
<span id="L1284"><span class="lineNum"> 1284</span> : }</span>
<span id="L1285"><span class="lineNum"> 1285</span> : </span>
<span id="L1286"><span class="lineNum"> 1286</span> : static constexpr bool __nothrow_default_constructible()</span>
<span id="L1287"><span class="lineNum"> 1287</span> : {</span>
<span id="L1288"><span class="lineNum"> 1288</span> : return __and_&lt;is_nothrow_default_constructible&lt;_T1&gt;,</span>
<span id="L1289"><span class="lineNum"> 1289</span> : is_nothrow_default_constructible&lt;_T2&gt;&gt;::value;</span>
<span id="L1290"><span class="lineNum"> 1290</span> : }</span>
<span id="L1291"><span class="lineNum"> 1291</span> : </span>
<span id="L1292"><span class="lineNum"> 1292</span> : template&lt;typename _U1&gt;</span>
<span id="L1293"><span class="lineNum"> 1293</span> : static constexpr bool __is_alloc_arg()</span>
<span id="L1294"><span class="lineNum"> 1294</span> : { return is_same&lt;__remove_cvref_t&lt;_U1&gt;, allocator_arg_t&gt;::value; }</span>
<span id="L1295"><span class="lineNum"> 1295</span> : </span>
<span id="L1296"><span class="lineNum"> 1296</span> : #if __cplusplus &gt; 202002L</span>
<span id="L1297"><span class="lineNum"> 1297</span> : template&lt;typename _U1, typename _U2&gt;</span>
<span id="L1298"><span class="lineNum"> 1298</span> : static constexpr bool __constructible</span>
<span id="L1299"><span class="lineNum"> 1299</span> : = _TCC&lt;true&gt;::template __constructible&lt;_U1, _U2&gt;::value;</span>
<span id="L1300"><span class="lineNum"> 1300</span> : </span>
<span id="L1301"><span class="lineNum"> 1301</span> : template&lt;typename _U1, typename _U2&gt;</span>
<span id="L1302"><span class="lineNum"> 1302</span> : static constexpr bool __convertible</span>
<span id="L1303"><span class="lineNum"> 1303</span> : = _TCC&lt;true&gt;::template __convertible&lt;_U1, _U2&gt;::value;</span>
<span id="L1304"><span class="lineNum"> 1304</span> : #endif // C++23</span>
<span id="L1305"><span class="lineNum"> 1305</span> : </span>
<span id="L1306"><span class="lineNum"> 1306</span> : public:</span>
<span id="L1307"><span class="lineNum"> 1307</span> : template&lt;bool _Dummy = true,</span>
<span id="L1308"><span class="lineNum"> 1308</span> : _ImplicitDefaultCtor&lt;_Dummy, _T1, _T2&gt; = true&gt;</span>
<span id="L1309"><span class="lineNum"> 1309</span> : constexpr</span>
<span id="L1310"><span class="lineNum"> 1310</span> <span class="tlaGNC"> 2051824 : tuple()</span></span>
<span id="L1311"><span class="lineNum"> 1311</span> : noexcept(__nothrow_default_constructible())</span>
<span id="L1312"><span class="lineNum"> 1312</span> <span class="tlaGNC"> 2051824 : : _Inherited() { }</span></span>
<span id="L1313"><span class="lineNum"> 1313</span> : </span>
<span id="L1314"><span class="lineNum"> 1314</span> : template&lt;bool _Dummy = true,</span>
<span id="L1315"><span class="lineNum"> 1315</span> : _ExplicitDefaultCtor&lt;_Dummy, _T1, _T2&gt; = false&gt;</span>
<span id="L1316"><span class="lineNum"> 1316</span> : explicit constexpr</span>
<span id="L1317"><span class="lineNum"> 1317</span> : tuple()</span>
<span id="L1318"><span class="lineNum"> 1318</span> : noexcept(__nothrow_default_constructible())</span>
<span id="L1319"><span class="lineNum"> 1319</span> : : _Inherited() { }</span>
<span id="L1320"><span class="lineNum"> 1320</span> : </span>
<span id="L1321"><span class="lineNum"> 1321</span> : template&lt;bool _Dummy = true,</span>
<span id="L1322"><span class="lineNum"> 1322</span> : _ImplicitCtor&lt;_Dummy, const _T1&amp;, const _T2&amp;&gt; = true&gt;</span>
<span id="L1323"><span class="lineNum"> 1323</span> : constexpr</span>
<span id="L1324"><span class="lineNum"> 1324</span> : tuple(const _T1&amp; __a1, const _T2&amp; __a2)</span>
<span id="L1325"><span class="lineNum"> 1325</span> : noexcept(__nothrow_constructible&lt;const _T1&amp;, const _T2&amp;&gt;())</span>
<span id="L1326"><span class="lineNum"> 1326</span> : : _Inherited(__a1, __a2) { }</span>
<span id="L1327"><span class="lineNum"> 1327</span> : </span>
<span id="L1328"><span class="lineNum"> 1328</span> : template&lt;bool _Dummy = true,</span>
<span id="L1329"><span class="lineNum"> 1329</span> : _ExplicitCtor&lt;_Dummy, const _T1&amp;, const _T2&amp;&gt; = false&gt;</span>
<span id="L1330"><span class="lineNum"> 1330</span> : explicit constexpr</span>
<span id="L1331"><span class="lineNum"> 1331</span> : tuple(const _T1&amp; __a1, const _T2&amp; __a2)</span>
<span id="L1332"><span class="lineNum"> 1332</span> : noexcept(__nothrow_constructible&lt;const _T1&amp;, const _T2&amp;&gt;())</span>
<span id="L1333"><span class="lineNum"> 1333</span> : : _Inherited(__a1, __a2) { }</span>
<span id="L1334"><span class="lineNum"> 1334</span> : </span>
<span id="L1335"><span class="lineNum"> 1335</span> : template&lt;typename _U1, typename _U2,</span>
<span id="L1336"><span class="lineNum"> 1336</span> : _ImplicitCtor&lt;!__is_alloc_arg&lt;_U1&gt;(), _U1, _U2&gt; = true&gt;</span>
<span id="L1337"><span class="lineNum"> 1337</span> : constexpr</span>
<span id="L1338"><span class="lineNum"> 1338</span> <span class="tlaGNC"> 644 : tuple(_U1&amp;&amp; __a1, _U2&amp;&amp; __a2)</span></span>
<span id="L1339"><span class="lineNum"> 1339</span> : noexcept(__nothrow_constructible&lt;_U1, _U2&gt;())</span>
<span id="L1340"><span class="lineNum"> 1340</span> <span class="tlaGNC"> 644 : : _Inherited(std::forward&lt;_U1&gt;(__a1), std::forward&lt;_U2&gt;(__a2)) { }</span></span>
<span id="L1341"><span class="lineNum"> 1341</span> : </span>
<span id="L1342"><span class="lineNum"> 1342</span> : template&lt;typename _U1, typename _U2,</span>
<span id="L1343"><span class="lineNum"> 1343</span> : _ExplicitCtor&lt;!__is_alloc_arg&lt;_U1&gt;(), _U1, _U2&gt; = false&gt;</span>
<span id="L1344"><span class="lineNum"> 1344</span> : explicit constexpr</span>
<span id="L1345"><span class="lineNum"> 1345</span> : tuple(_U1&amp;&amp; __a1, _U2&amp;&amp; __a2)</span>
<span id="L1346"><span class="lineNum"> 1346</span> : noexcept(__nothrow_constructible&lt;_U1, _U2&gt;())</span>
<span id="L1347"><span class="lineNum"> 1347</span> : : _Inherited(std::forward&lt;_U1&gt;(__a1), std::forward&lt;_U2&gt;(__a2)) { }</span>
<span id="L1348"><span class="lineNum"> 1348</span> : </span>
<span id="L1349"><span class="lineNum"> 1349</span> : constexpr tuple(const tuple&amp;) = default;</span>
<span id="L1350"><span class="lineNum"> 1350</span> : </span>
<span id="L1351"><span class="lineNum"> 1351</span> <span class="tlaGNC"> 1210 : constexpr tuple(tuple&amp;&amp;) = default;</span></span>
<span id="L1352"><span class="lineNum"> 1352</span> : </span>
<span id="L1353"><span class="lineNum"> 1353</span> : template&lt;typename _U1, typename _U2,</span>
<span id="L1354"><span class="lineNum"> 1354</span> : _ImplicitCtor&lt;true, const _U1&amp;, const _U2&amp;&gt; = true&gt;</span>
<span id="L1355"><span class="lineNum"> 1355</span> : constexpr</span>
<span id="L1356"><span class="lineNum"> 1356</span> : tuple(const tuple&lt;_U1, _U2&gt;&amp; __in)</span>
<span id="L1357"><span class="lineNum"> 1357</span> : noexcept(__nothrow_constructible&lt;const _U1&amp;, const _U2&amp;&gt;())</span>
<span id="L1358"><span class="lineNum"> 1358</span> : : _Inherited(static_cast&lt;const _Tuple_impl&lt;0, _U1, _U2&gt;&amp;&gt;(__in)) { }</span>
<span id="L1359"><span class="lineNum"> 1359</span> : </span>
<span id="L1360"><span class="lineNum"> 1360</span> : template&lt;typename _U1, typename _U2,</span>
<span id="L1361"><span class="lineNum"> 1361</span> : _ExplicitCtor&lt;true, const _U1&amp;, const _U2&amp;&gt; = false&gt;</span>
<span id="L1362"><span class="lineNum"> 1362</span> : explicit constexpr</span>
<span id="L1363"><span class="lineNum"> 1363</span> : tuple(const tuple&lt;_U1, _U2&gt;&amp; __in)</span>
<span id="L1364"><span class="lineNum"> 1364</span> : noexcept(__nothrow_constructible&lt;const _U1&amp;, const _U2&amp;&gt;())</span>
<span id="L1365"><span class="lineNum"> 1365</span> : : _Inherited(static_cast&lt;const _Tuple_impl&lt;0, _U1, _U2&gt;&amp;&gt;(__in)) { }</span>
<span id="L1366"><span class="lineNum"> 1366</span> : </span>
<span id="L1367"><span class="lineNum"> 1367</span> : template&lt;typename _U1, typename _U2,</span>
<span id="L1368"><span class="lineNum"> 1368</span> : _ImplicitCtor&lt;true, _U1, _U2&gt; = true&gt;</span>
<span id="L1369"><span class="lineNum"> 1369</span> : constexpr</span>
<span id="L1370"><span class="lineNum"> 1370</span> : tuple(tuple&lt;_U1, _U2&gt;&amp;&amp; __in)</span>
<span id="L1371"><span class="lineNum"> 1371</span> : noexcept(__nothrow_constructible&lt;_U1, _U2&gt;())</span>
<span id="L1372"><span class="lineNum"> 1372</span> : : _Inherited(static_cast&lt;_Tuple_impl&lt;0, _U1, _U2&gt;&amp;&amp;&gt;(__in)) { }</span>
<span id="L1373"><span class="lineNum"> 1373</span> : </span>
<span id="L1374"><span class="lineNum"> 1374</span> : template&lt;typename _U1, typename _U2,</span>
<span id="L1375"><span class="lineNum"> 1375</span> : _ExplicitCtor&lt;true, _U1, _U2&gt; = false&gt;</span>
<span id="L1376"><span class="lineNum"> 1376</span> : explicit constexpr</span>
<span id="L1377"><span class="lineNum"> 1377</span> : tuple(tuple&lt;_U1, _U2&gt;&amp;&amp; __in)</span>
<span id="L1378"><span class="lineNum"> 1378</span> : noexcept(__nothrow_constructible&lt;_U1, _U2&gt;())</span>
<span id="L1379"><span class="lineNum"> 1379</span> : : _Inherited(static_cast&lt;_Tuple_impl&lt;0, _U1, _U2&gt;&amp;&amp;&gt;(__in)) { }</span>
<span id="L1380"><span class="lineNum"> 1380</span> : </span>
<span id="L1381"><span class="lineNum"> 1381</span> : #if __cplusplus &gt; 202002L</span>
<span id="L1382"><span class="lineNum"> 1382</span> : template&lt;typename _U1, typename _U2&gt;</span>
<span id="L1383"><span class="lineNum"> 1383</span> : requires __constructible&lt;_U1&amp;, _U2&amp;&gt;</span>
<span id="L1384"><span class="lineNum"> 1384</span> : explicit(!__convertible&lt;_U1&amp;, _U2&amp;&gt;)</span>
<span id="L1385"><span class="lineNum"> 1385</span> : constexpr</span>
<span id="L1386"><span class="lineNum"> 1386</span> : tuple(tuple&lt;_U1, _U2&gt;&amp; __in)</span>
<span id="L1387"><span class="lineNum"> 1387</span> : noexcept(__nothrow_constructible&lt;_U1&amp;, _U2&amp;&gt;())</span>
<span id="L1388"><span class="lineNum"> 1388</span> : : _Inherited(static_cast&lt;_Tuple_impl&lt;0, _U1, _U2&gt;&amp;&gt;(__in)) { }</span>
<span id="L1389"><span class="lineNum"> 1389</span> : </span>
<span id="L1390"><span class="lineNum"> 1390</span> : template&lt;typename _U1, typename _U2&gt;</span>
<span id="L1391"><span class="lineNum"> 1391</span> : requires __constructible&lt;const _U1, const _U2&gt;</span>
<span id="L1392"><span class="lineNum"> 1392</span> : explicit(!__convertible&lt;const _U1, const _U2&gt;)</span>
<span id="L1393"><span class="lineNum"> 1393</span> : constexpr</span>
<span id="L1394"><span class="lineNum"> 1394</span> : tuple(const tuple&lt;_U1, _U2&gt;&amp;&amp; __in)</span>
<span id="L1395"><span class="lineNum"> 1395</span> : noexcept(__nothrow_constructible&lt;const _U1, const _U2&gt;())</span>
<span id="L1396"><span class="lineNum"> 1396</span> : : _Inherited(static_cast&lt;const _Tuple_impl&lt;0, _U1, _U2&gt;&amp;&amp;&gt;(__in)) { }</span>
<span id="L1397"><span class="lineNum"> 1397</span> : #endif // C++23</span>
<span id="L1398"><span class="lineNum"> 1398</span> : </span>
<span id="L1399"><span class="lineNum"> 1399</span> : template&lt;typename _U1, typename _U2,</span>
<span id="L1400"><span class="lineNum"> 1400</span> : _ImplicitCtor&lt;true, const _U1&amp;, const _U2&amp;&gt; = true&gt;</span>
<span id="L1401"><span class="lineNum"> 1401</span> : constexpr</span>
<span id="L1402"><span class="lineNum"> 1402</span> : tuple(const pair&lt;_U1, _U2&gt;&amp; __in)</span>
<span id="L1403"><span class="lineNum"> 1403</span> : noexcept(__nothrow_constructible&lt;const _U1&amp;, const _U2&amp;&gt;())</span>
<span id="L1404"><span class="lineNum"> 1404</span> : : _Inherited(__in.first, __in.second) { }</span>
<span id="L1405"><span class="lineNum"> 1405</span> : </span>
<span id="L1406"><span class="lineNum"> 1406</span> : template&lt;typename _U1, typename _U2,</span>
<span id="L1407"><span class="lineNum"> 1407</span> : _ExplicitCtor&lt;true, const _U1&amp;, const _U2&amp;&gt; = false&gt;</span>
<span id="L1408"><span class="lineNum"> 1408</span> : explicit constexpr</span>
<span id="L1409"><span class="lineNum"> 1409</span> : tuple(const pair&lt;_U1, _U2&gt;&amp; __in)</span>
<span id="L1410"><span class="lineNum"> 1410</span> : noexcept(__nothrow_constructible&lt;const _U1&amp;, const _U2&amp;&gt;())</span>
<span id="L1411"><span class="lineNum"> 1411</span> : : _Inherited(__in.first, __in.second) { }</span>
<span id="L1412"><span class="lineNum"> 1412</span> : </span>
<span id="L1413"><span class="lineNum"> 1413</span> : template&lt;typename _U1, typename _U2,</span>
<span id="L1414"><span class="lineNum"> 1414</span> : _ImplicitCtor&lt;true, _U1, _U2&gt; = true&gt;</span>
<span id="L1415"><span class="lineNum"> 1415</span> : constexpr</span>
<span id="L1416"><span class="lineNum"> 1416</span> : tuple(pair&lt;_U1, _U2&gt;&amp;&amp; __in)</span>
<span id="L1417"><span class="lineNum"> 1417</span> : noexcept(__nothrow_constructible&lt;_U1, _U2&gt;())</span>
<span id="L1418"><span class="lineNum"> 1418</span> : : _Inherited(std::forward&lt;_U1&gt;(__in.first),</span>
<span id="L1419"><span class="lineNum"> 1419</span> : std::forward&lt;_U2&gt;(__in.second)) { }</span>
<span id="L1420"><span class="lineNum"> 1420</span> : </span>
<span id="L1421"><span class="lineNum"> 1421</span> : template&lt;typename _U1, typename _U2,</span>
<span id="L1422"><span class="lineNum"> 1422</span> : _ExplicitCtor&lt;true, _U1, _U2&gt; = false&gt;</span>
<span id="L1423"><span class="lineNum"> 1423</span> : explicit constexpr</span>
<span id="L1424"><span class="lineNum"> 1424</span> : tuple(pair&lt;_U1, _U2&gt;&amp;&amp; __in)</span>
<span id="L1425"><span class="lineNum"> 1425</span> : noexcept(__nothrow_constructible&lt;_U1, _U2&gt;())</span>
<span id="L1426"><span class="lineNum"> 1426</span> : : _Inherited(std::forward&lt;_U1&gt;(__in.first),</span>
<span id="L1427"><span class="lineNum"> 1427</span> : std::forward&lt;_U2&gt;(__in.second)) { }</span>
<span id="L1428"><span class="lineNum"> 1428</span> : </span>
<span id="L1429"><span class="lineNum"> 1429</span> : #if __cplusplus &gt; 202002L</span>
<span id="L1430"><span class="lineNum"> 1430</span> : template&lt;typename _U1, typename _U2&gt;</span>
<span id="L1431"><span class="lineNum"> 1431</span> : requires __constructible&lt;_U1&amp;, _U2&amp;&gt;</span>
<span id="L1432"><span class="lineNum"> 1432</span> : explicit(!__convertible&lt;_U1&amp;, _U2&amp;&gt;)</span>
<span id="L1433"><span class="lineNum"> 1433</span> : constexpr</span>
<span id="L1434"><span class="lineNum"> 1434</span> : tuple(pair&lt;_U1, _U2&gt;&amp; __in)</span>
<span id="L1435"><span class="lineNum"> 1435</span> : noexcept(__nothrow_constructible&lt;_U1&amp;, _U2&amp;&gt;())</span>
<span id="L1436"><span class="lineNum"> 1436</span> : : _Inherited(__in.first, __in.second) { }</span>
<span id="L1437"><span class="lineNum"> 1437</span> : </span>
<span id="L1438"><span class="lineNum"> 1438</span> : template&lt;typename _U1, typename _U2&gt;</span>
<span id="L1439"><span class="lineNum"> 1439</span> : requires __constructible&lt;const _U1, const _U2&gt;</span>
<span id="L1440"><span class="lineNum"> 1440</span> : explicit(!__convertible&lt;const _U1, const _U2&gt;)</span>
<span id="L1441"><span class="lineNum"> 1441</span> : constexpr</span>
<span id="L1442"><span class="lineNum"> 1442</span> : tuple(const pair&lt;_U1, _U2&gt;&amp;&amp; __in)</span>
<span id="L1443"><span class="lineNum"> 1443</span> : noexcept(__nothrow_constructible&lt;const _U1, const _U2&gt;())</span>
<span id="L1444"><span class="lineNum"> 1444</span> : : _Inherited(std::forward&lt;const _U1&gt;(__in.first),</span>
<span id="L1445"><span class="lineNum"> 1445</span> : std::forward&lt;const _U2&gt;(__in.second)) { }</span>
<span id="L1446"><span class="lineNum"> 1446</span> : #endif // C++23</span>
<span id="L1447"><span class="lineNum"> 1447</span> : </span>
<span id="L1448"><span class="lineNum"> 1448</span> : // Allocator-extended constructors.</span>
<span id="L1449"><span class="lineNum"> 1449</span> : </span>
<span id="L1450"><span class="lineNum"> 1450</span> : template&lt;typename _Alloc,</span>
<span id="L1451"><span class="lineNum"> 1451</span> : _ImplicitDefaultCtor&lt;is_object&lt;_Alloc&gt;::value, _T1, _T2&gt; = true&gt;</span>
<span id="L1452"><span class="lineNum"> 1452</span> : _GLIBCXX20_CONSTEXPR</span>
<span id="L1453"><span class="lineNum"> 1453</span> : tuple(allocator_arg_t __tag, const _Alloc&amp; __a)</span>
<span id="L1454"><span class="lineNum"> 1454</span> : : _Inherited(__tag, __a) { }</span>
<span id="L1455"><span class="lineNum"> 1455</span> : </span>
<span id="L1456"><span class="lineNum"> 1456</span> : template&lt;typename _Alloc, bool _Dummy = true,</span>
<span id="L1457"><span class="lineNum"> 1457</span> : _ImplicitCtor&lt;_Dummy, const _T1&amp;, const _T2&amp;&gt; = true&gt;</span>
<span id="L1458"><span class="lineNum"> 1458</span> : _GLIBCXX20_CONSTEXPR</span>
<span id="L1459"><span class="lineNum"> 1459</span> : tuple(allocator_arg_t __tag, const _Alloc&amp; __a,</span>
<span id="L1460"><span class="lineNum"> 1460</span> : const _T1&amp; __a1, const _T2&amp; __a2)</span>
<span id="L1461"><span class="lineNum"> 1461</span> : : _Inherited(__tag, __a, __a1, __a2) { }</span>
<span id="L1462"><span class="lineNum"> 1462</span> : </span>
<span id="L1463"><span class="lineNum"> 1463</span> : template&lt;typename _Alloc, bool _Dummy = true,</span>
<span id="L1464"><span class="lineNum"> 1464</span> : _ExplicitCtor&lt;_Dummy, const _T1&amp;, const _T2&amp;&gt; = false&gt;</span>
<span id="L1465"><span class="lineNum"> 1465</span> : explicit</span>
<span id="L1466"><span class="lineNum"> 1466</span> : _GLIBCXX20_CONSTEXPR</span>
<span id="L1467"><span class="lineNum"> 1467</span> : tuple(allocator_arg_t __tag, const _Alloc&amp; __a,</span>
<span id="L1468"><span class="lineNum"> 1468</span> : const _T1&amp; __a1, const _T2&amp; __a2)</span>
<span id="L1469"><span class="lineNum"> 1469</span> : : _Inherited(__tag, __a, __a1, __a2) { }</span>
<span id="L1470"><span class="lineNum"> 1470</span> : </span>
<span id="L1471"><span class="lineNum"> 1471</span> : template&lt;typename _Alloc, typename _U1, typename _U2,</span>
<span id="L1472"><span class="lineNum"> 1472</span> : _ImplicitCtor&lt;true, _U1, _U2&gt; = true&gt;</span>
<span id="L1473"><span class="lineNum"> 1473</span> : _GLIBCXX20_CONSTEXPR</span>
<span id="L1474"><span class="lineNum"> 1474</span> : tuple(allocator_arg_t __tag, const _Alloc&amp; __a, _U1&amp;&amp; __a1, _U2&amp;&amp; __a2)</span>
<span id="L1475"><span class="lineNum"> 1475</span> : : _Inherited(__tag, __a, std::forward&lt;_U1&gt;(__a1),</span>
<span id="L1476"><span class="lineNum"> 1476</span> : std::forward&lt;_U2&gt;(__a2)) { }</span>
<span id="L1477"><span class="lineNum"> 1477</span> : </span>
<span id="L1478"><span class="lineNum"> 1478</span> : template&lt;typename _Alloc, typename _U1, typename _U2,</span>
<span id="L1479"><span class="lineNum"> 1479</span> : _ExplicitCtor&lt;true, _U1, _U2&gt; = false&gt;</span>
<span id="L1480"><span class="lineNum"> 1480</span> : explicit</span>
<span id="L1481"><span class="lineNum"> 1481</span> : _GLIBCXX20_CONSTEXPR</span>
<span id="L1482"><span class="lineNum"> 1482</span> : tuple(allocator_arg_t __tag, const _Alloc&amp; __a,</span>
<span id="L1483"><span class="lineNum"> 1483</span> : _U1&amp;&amp; __a1, _U2&amp;&amp; __a2)</span>
<span id="L1484"><span class="lineNum"> 1484</span> : : _Inherited(__tag, __a, std::forward&lt;_U1&gt;(__a1),</span>
<span id="L1485"><span class="lineNum"> 1485</span> : std::forward&lt;_U2&gt;(__a2)) { }</span>
<span id="L1486"><span class="lineNum"> 1486</span> : </span>
<span id="L1487"><span class="lineNum"> 1487</span> : template&lt;typename _Alloc&gt;</span>
<span id="L1488"><span class="lineNum"> 1488</span> : _GLIBCXX20_CONSTEXPR</span>
<span id="L1489"><span class="lineNum"> 1489</span> : tuple(allocator_arg_t __tag, const _Alloc&amp; __a, const tuple&amp; __in)</span>
<span id="L1490"><span class="lineNum"> 1490</span> : : _Inherited(__tag, __a, static_cast&lt;const _Inherited&amp;&gt;(__in)) { }</span>
<span id="L1491"><span class="lineNum"> 1491</span> : </span>
<span id="L1492"><span class="lineNum"> 1492</span> : template&lt;typename _Alloc&gt;</span>
<span id="L1493"><span class="lineNum"> 1493</span> : _GLIBCXX20_CONSTEXPR</span>
<span id="L1494"><span class="lineNum"> 1494</span> : tuple(allocator_arg_t __tag, const _Alloc&amp; __a, tuple&amp;&amp; __in)</span>
<span id="L1495"><span class="lineNum"> 1495</span> : : _Inherited(__tag, __a, static_cast&lt;_Inherited&amp;&amp;&gt;(__in)) { }</span>
<span id="L1496"><span class="lineNum"> 1496</span> : </span>
<span id="L1497"><span class="lineNum"> 1497</span> : template&lt;typename _Alloc, typename _U1, typename _U2,</span>
<span id="L1498"><span class="lineNum"> 1498</span> : _ImplicitCtor&lt;true, const _U1&amp;, const _U2&amp;&gt; = true&gt;</span>
<span id="L1499"><span class="lineNum"> 1499</span> : _GLIBCXX20_CONSTEXPR</span>
<span id="L1500"><span class="lineNum"> 1500</span> : tuple(allocator_arg_t __tag, const _Alloc&amp; __a,</span>
<span id="L1501"><span class="lineNum"> 1501</span> : const tuple&lt;_U1, _U2&gt;&amp; __in)</span>
<span id="L1502"><span class="lineNum"> 1502</span> : : _Inherited(__tag, __a,</span>
<span id="L1503"><span class="lineNum"> 1503</span> : static_cast&lt;const _Tuple_impl&lt;0, _U1, _U2&gt;&amp;&gt;(__in))</span>
<span id="L1504"><span class="lineNum"> 1504</span> : { }</span>
<span id="L1505"><span class="lineNum"> 1505</span> : </span>
<span id="L1506"><span class="lineNum"> 1506</span> : template&lt;typename _Alloc, typename _U1, typename _U2,</span>
<span id="L1507"><span class="lineNum"> 1507</span> : _ExplicitCtor&lt;true, const _U1&amp;, const _U2&amp;&gt; = false&gt;</span>
<span id="L1508"><span class="lineNum"> 1508</span> : explicit</span>
<span id="L1509"><span class="lineNum"> 1509</span> : _GLIBCXX20_CONSTEXPR</span>
<span id="L1510"><span class="lineNum"> 1510</span> : tuple(allocator_arg_t __tag, const _Alloc&amp; __a,</span>
<span id="L1511"><span class="lineNum"> 1511</span> : const tuple&lt;_U1, _U2&gt;&amp; __in)</span>
<span id="L1512"><span class="lineNum"> 1512</span> : : _Inherited(__tag, __a,</span>
<span id="L1513"><span class="lineNum"> 1513</span> : static_cast&lt;const _Tuple_impl&lt;0, _U1, _U2&gt;&amp;&gt;(__in))</span>
<span id="L1514"><span class="lineNum"> 1514</span> : { }</span>
<span id="L1515"><span class="lineNum"> 1515</span> : </span>
<span id="L1516"><span class="lineNum"> 1516</span> : template&lt;typename _Alloc, typename _U1, typename _U2,</span>
<span id="L1517"><span class="lineNum"> 1517</span> : _ImplicitCtor&lt;true, _U1, _U2&gt; = true&gt;</span>
<span id="L1518"><span class="lineNum"> 1518</span> : _GLIBCXX20_CONSTEXPR</span>
<span id="L1519"><span class="lineNum"> 1519</span> : tuple(allocator_arg_t __tag, const _Alloc&amp; __a, tuple&lt;_U1, _U2&gt;&amp;&amp; __in)</span>
<span id="L1520"><span class="lineNum"> 1520</span> : : _Inherited(__tag, __a, static_cast&lt;_Tuple_impl&lt;0, _U1, _U2&gt;&amp;&amp;&gt;(__in))</span>
<span id="L1521"><span class="lineNum"> 1521</span> : { }</span>
<span id="L1522"><span class="lineNum"> 1522</span> : </span>
<span id="L1523"><span class="lineNum"> 1523</span> : template&lt;typename _Alloc, typename _U1, typename _U2,</span>
<span id="L1524"><span class="lineNum"> 1524</span> : _ExplicitCtor&lt;true, _U1, _U2&gt; = false&gt;</span>
<span id="L1525"><span class="lineNum"> 1525</span> : explicit</span>
<span id="L1526"><span class="lineNum"> 1526</span> : _GLIBCXX20_CONSTEXPR</span>
<span id="L1527"><span class="lineNum"> 1527</span> : tuple(allocator_arg_t __tag, const _Alloc&amp; __a, tuple&lt;_U1, _U2&gt;&amp;&amp; __in)</span>
<span id="L1528"><span class="lineNum"> 1528</span> : : _Inherited(__tag, __a, static_cast&lt;_Tuple_impl&lt;0, _U1, _U2&gt;&amp;&amp;&gt;(__in))</span>
<span id="L1529"><span class="lineNum"> 1529</span> : { }</span>
<span id="L1530"><span class="lineNum"> 1530</span> : </span>
<span id="L1531"><span class="lineNum"> 1531</span> : #if __cplusplus &gt; 202002L</span>
<span id="L1532"><span class="lineNum"> 1532</span> : template&lt;typename _Alloc, typename _U1, typename _U2&gt;</span>
<span id="L1533"><span class="lineNum"> 1533</span> : requires __constructible&lt;_U1&amp;, _U2&amp;&gt;</span>
<span id="L1534"><span class="lineNum"> 1534</span> : explicit(!__convertible&lt;_U1&amp;, _U2&amp;&gt;)</span>
<span id="L1535"><span class="lineNum"> 1535</span> : constexpr</span>
<span id="L1536"><span class="lineNum"> 1536</span> : tuple(allocator_arg_t __tag, const _Alloc&amp; __a,</span>
<span id="L1537"><span class="lineNum"> 1537</span> : tuple&lt;_U1, _U2&gt;&amp; __in)</span>
<span id="L1538"><span class="lineNum"> 1538</span> : : _Inherited(__tag, __a,</span>
<span id="L1539"><span class="lineNum"> 1539</span> : static_cast&lt;_Tuple_impl&lt;0, _U1, _U2&gt;&amp;&gt;(__in))</span>
<span id="L1540"><span class="lineNum"> 1540</span> : { }</span>
<span id="L1541"><span class="lineNum"> 1541</span> : </span>
<span id="L1542"><span class="lineNum"> 1542</span> : template&lt;typename _Alloc, typename _U1, typename _U2&gt;</span>
<span id="L1543"><span class="lineNum"> 1543</span> : requires __constructible&lt;const _U1, const _U2&gt;</span>
<span id="L1544"><span class="lineNum"> 1544</span> : explicit(!__convertible&lt;const _U1, const _U2&gt;)</span>
<span id="L1545"><span class="lineNum"> 1545</span> : constexpr</span>
<span id="L1546"><span class="lineNum"> 1546</span> : tuple(allocator_arg_t __tag, const _Alloc&amp; __a,</span>
<span id="L1547"><span class="lineNum"> 1547</span> : const tuple&lt;_U1, _U2&gt;&amp;&amp; __in)</span>
<span id="L1548"><span class="lineNum"> 1548</span> : : _Inherited(__tag, __a,</span>
<span id="L1549"><span class="lineNum"> 1549</span> : static_cast&lt;const _Tuple_impl&lt;0, _U1, _U2&gt;&amp;&amp;&gt;(__in))</span>
<span id="L1550"><span class="lineNum"> 1550</span> : { }</span>
<span id="L1551"><span class="lineNum"> 1551</span> : #endif // C++23</span>
<span id="L1552"><span class="lineNum"> 1552</span> : </span>
<span id="L1553"><span class="lineNum"> 1553</span> : template&lt;typename _Alloc, typename _U1, typename _U2,</span>
<span id="L1554"><span class="lineNum"> 1554</span> : _ImplicitCtor&lt;true, const _U1&amp;, const _U2&amp;&gt; = true&gt;</span>
<span id="L1555"><span class="lineNum"> 1555</span> : _GLIBCXX20_CONSTEXPR</span>
<span id="L1556"><span class="lineNum"> 1556</span> : tuple(allocator_arg_t __tag, const _Alloc&amp; __a,</span>
<span id="L1557"><span class="lineNum"> 1557</span> : const pair&lt;_U1, _U2&gt;&amp; __in)</span>
<span id="L1558"><span class="lineNum"> 1558</span> : : _Inherited(__tag, __a, __in.first, __in.second) { }</span>
<span id="L1559"><span class="lineNum"> 1559</span> : </span>
<span id="L1560"><span class="lineNum"> 1560</span> : template&lt;typename _Alloc, typename _U1, typename _U2,</span>
<span id="L1561"><span class="lineNum"> 1561</span> : _ExplicitCtor&lt;true, const _U1&amp;, const _U2&amp;&gt; = false&gt;</span>
<span id="L1562"><span class="lineNum"> 1562</span> : explicit</span>
<span id="L1563"><span class="lineNum"> 1563</span> : _GLIBCXX20_CONSTEXPR</span>
<span id="L1564"><span class="lineNum"> 1564</span> : tuple(allocator_arg_t __tag, const _Alloc&amp; __a,</span>
<span id="L1565"><span class="lineNum"> 1565</span> : const pair&lt;_U1, _U2&gt;&amp; __in)</span>
<span id="L1566"><span class="lineNum"> 1566</span> : : _Inherited(__tag, __a, __in.first, __in.second) { }</span>
<span id="L1567"><span class="lineNum"> 1567</span> : </span>
<span id="L1568"><span class="lineNum"> 1568</span> : template&lt;typename _Alloc, typename _U1, typename _U2,</span>
<span id="L1569"><span class="lineNum"> 1569</span> : _ImplicitCtor&lt;true, _U1, _U2&gt; = true&gt;</span>
<span id="L1570"><span class="lineNum"> 1570</span> : _GLIBCXX20_CONSTEXPR</span>
<span id="L1571"><span class="lineNum"> 1571</span> : tuple(allocator_arg_t __tag, const _Alloc&amp; __a, pair&lt;_U1, _U2&gt;&amp;&amp; __in)</span>
<span id="L1572"><span class="lineNum"> 1572</span> : : _Inherited(__tag, __a, std::forward&lt;_U1&gt;(__in.first),</span>
<span id="L1573"><span class="lineNum"> 1573</span> : std::forward&lt;_U2&gt;(__in.second)) { }</span>
<span id="L1574"><span class="lineNum"> 1574</span> : </span>
<span id="L1575"><span class="lineNum"> 1575</span> : template&lt;typename _Alloc, typename _U1, typename _U2,</span>
<span id="L1576"><span class="lineNum"> 1576</span> : _ExplicitCtor&lt;true, _U1, _U2&gt; = false&gt;</span>
<span id="L1577"><span class="lineNum"> 1577</span> : explicit</span>
<span id="L1578"><span class="lineNum"> 1578</span> : _GLIBCXX20_CONSTEXPR</span>
<span id="L1579"><span class="lineNum"> 1579</span> : tuple(allocator_arg_t __tag, const _Alloc&amp; __a, pair&lt;_U1, _U2&gt;&amp;&amp; __in)</span>
<span id="L1580"><span class="lineNum"> 1580</span> : : _Inherited(__tag, __a, std::forward&lt;_U1&gt;(__in.first),</span>
<span id="L1581"><span class="lineNum"> 1581</span> : std::forward&lt;_U2&gt;(__in.second)) { }</span>
<span id="L1582"><span class="lineNum"> 1582</span> : </span>
<span id="L1583"><span class="lineNum"> 1583</span> : #if __cplusplus &gt; 202002L</span>
<span id="L1584"><span class="lineNum"> 1584</span> : template&lt;typename _Alloc, typename _U1, typename _U2&gt;</span>
<span id="L1585"><span class="lineNum"> 1585</span> : requires __constructible&lt;_U1&amp;, _U2&amp;&gt;</span>
<span id="L1586"><span class="lineNum"> 1586</span> : explicit(!__convertible&lt;_U1&amp;, _U2&amp;&gt;)</span>
<span id="L1587"><span class="lineNum"> 1587</span> : constexpr</span>
<span id="L1588"><span class="lineNum"> 1588</span> : tuple(allocator_arg_t __tag, const _Alloc&amp; __a,</span>
<span id="L1589"><span class="lineNum"> 1589</span> : pair&lt;_U1, _U2&gt;&amp; __in)</span>
<span id="L1590"><span class="lineNum"> 1590</span> : : _Inherited(__tag, __a, __in.first, __in.second) { }</span>
<span id="L1591"><span class="lineNum"> 1591</span> : </span>
<span id="L1592"><span class="lineNum"> 1592</span> : template&lt;typename _Alloc, typename _U1, typename _U2&gt;</span>
<span id="L1593"><span class="lineNum"> 1593</span> : requires __constructible&lt;const _U1, const _U2&gt;</span>
<span id="L1594"><span class="lineNum"> 1594</span> : explicit(!__convertible&lt;const _U1, const _U2&gt;)</span>
<span id="L1595"><span class="lineNum"> 1595</span> : constexpr</span>
<span id="L1596"><span class="lineNum"> 1596</span> : tuple(allocator_arg_t __tag, const _Alloc&amp; __a, const pair&lt;_U1, _U2&gt;&amp;&amp; __in)</span>
<span id="L1597"><span class="lineNum"> 1597</span> : : _Inherited(__tag, __a, std::forward&lt;const _U1&gt;(__in.first),</span>
<span id="L1598"><span class="lineNum"> 1598</span> : std::forward&lt;const _U2&gt;(__in.second)) { }</span>
<span id="L1599"><span class="lineNum"> 1599</span> : #endif // C++23</span>
<span id="L1600"><span class="lineNum"> 1600</span> : </span>
<span id="L1601"><span class="lineNum"> 1601</span> : // Tuple assignment.</span>
<span id="L1602"><span class="lineNum"> 1602</span> : </span>
<span id="L1603"><span class="lineNum"> 1603</span> : _GLIBCXX20_CONSTEXPR</span>
<span id="L1604"><span class="lineNum"> 1604</span> : tuple&amp;</span>
<span id="L1605"><span class="lineNum"> 1605</span> : operator=(__conditional_t&lt;__assignable&lt;const _T1&amp;, const _T2&amp;&gt;(),</span>
<span id="L1606"><span class="lineNum"> 1606</span> : const tuple&amp;,</span>
<span id="L1607"><span class="lineNum"> 1607</span> : const __nonesuch&amp;&gt; __in)</span>
<span id="L1608"><span class="lineNum"> 1608</span> : noexcept(__nothrow_assignable&lt;const _T1&amp;, const _T2&amp;&gt;())</span>
<span id="L1609"><span class="lineNum"> 1609</span> : {</span>
<span id="L1610"><span class="lineNum"> 1610</span> : this-&gt;_M_assign(__in);</span>
<span id="L1611"><span class="lineNum"> 1611</span> : return *this;</span>
<span id="L1612"><span class="lineNum"> 1612</span> : }</span>
<span id="L1613"><span class="lineNum"> 1613</span> : </span>
<span id="L1614"><span class="lineNum"> 1614</span> : _GLIBCXX20_CONSTEXPR</span>
<span id="L1615"><span class="lineNum"> 1615</span> : tuple&amp;</span>
<span id="L1616"><span class="lineNum"> 1616</span> : operator=(__conditional_t&lt;__assignable&lt;_T1, _T2&gt;(),</span>
<span id="L1617"><span class="lineNum"> 1617</span> : tuple&amp;&amp;,</span>
<span id="L1618"><span class="lineNum"> 1618</span> : __nonesuch&amp;&amp;&gt; __in)</span>
<span id="L1619"><span class="lineNum"> 1619</span> : noexcept(__nothrow_assignable&lt;_T1, _T2&gt;())</span>
<span id="L1620"><span class="lineNum"> 1620</span> : {</span>
<span id="L1621"><span class="lineNum"> 1621</span> : this-&gt;_M_assign(std::move(__in));</span>
<span id="L1622"><span class="lineNum"> 1622</span> : return *this;</span>
<span id="L1623"><span class="lineNum"> 1623</span> : }</span>
<span id="L1624"><span class="lineNum"> 1624</span> : </span>
<span id="L1625"><span class="lineNum"> 1625</span> : template&lt;typename _U1, typename _U2&gt;</span>
<span id="L1626"><span class="lineNum"> 1626</span> : _GLIBCXX20_CONSTEXPR</span>
<span id="L1627"><span class="lineNum"> 1627</span> : __enable_if_t&lt;__assignable&lt;const _U1&amp;, const _U2&amp;&gt;(), tuple&amp;&gt;</span>
<span id="L1628"><span class="lineNum"> 1628</span> : operator=(const tuple&lt;_U1, _U2&gt;&amp; __in)</span>
<span id="L1629"><span class="lineNum"> 1629</span> : noexcept(__nothrow_assignable&lt;const _U1&amp;, const _U2&amp;&gt;())</span>
<span id="L1630"><span class="lineNum"> 1630</span> : {</span>
<span id="L1631"><span class="lineNum"> 1631</span> : this-&gt;_M_assign(__in);</span>
<span id="L1632"><span class="lineNum"> 1632</span> : return *this;</span>
<span id="L1633"><span class="lineNum"> 1633</span> : }</span>
<span id="L1634"><span class="lineNum"> 1634</span> : </span>
<span id="L1635"><span class="lineNum"> 1635</span> : template&lt;typename _U1, typename _U2&gt;</span>
<span id="L1636"><span class="lineNum"> 1636</span> : _GLIBCXX20_CONSTEXPR</span>
<span id="L1637"><span class="lineNum"> 1637</span> : __enable_if_t&lt;__assignable&lt;_U1, _U2&gt;(), tuple&amp;&gt;</span>
<span id="L1638"><span class="lineNum"> 1638</span> : operator=(tuple&lt;_U1, _U2&gt;&amp;&amp; __in)</span>
<span id="L1639"><span class="lineNum"> 1639</span> : noexcept(__nothrow_assignable&lt;_U1, _U2&gt;())</span>
<span id="L1640"><span class="lineNum"> 1640</span> : {</span>
<span id="L1641"><span class="lineNum"> 1641</span> : this-&gt;_M_assign(std::move(__in));</span>
<span id="L1642"><span class="lineNum"> 1642</span> : return *this;</span>
<span id="L1643"><span class="lineNum"> 1643</span> : }</span>
<span id="L1644"><span class="lineNum"> 1644</span> : </span>
<span id="L1645"><span class="lineNum"> 1645</span> : #if __cplusplus &gt; 202002L</span>
<span id="L1646"><span class="lineNum"> 1646</span> : constexpr const tuple&amp;</span>
<span id="L1647"><span class="lineNum"> 1647</span> : operator=(const tuple&amp; __in) const</span>
<span id="L1648"><span class="lineNum"> 1648</span> : requires is_copy_assignable_v&lt;const _T1&gt; &amp;&amp; is_copy_assignable_v&lt;const _T2&gt;</span>
<span id="L1649"><span class="lineNum"> 1649</span> : {</span>
<span id="L1650"><span class="lineNum"> 1650</span> : this-&gt;_M_assign(__in);</span>
<span id="L1651"><span class="lineNum"> 1651</span> : return *this;</span>
<span id="L1652"><span class="lineNum"> 1652</span> : }</span>
<span id="L1653"><span class="lineNum"> 1653</span> : </span>
<span id="L1654"><span class="lineNum"> 1654</span> : constexpr const tuple&amp;</span>
<span id="L1655"><span class="lineNum"> 1655</span> : operator=(tuple&amp;&amp; __in) const</span>
<span id="L1656"><span class="lineNum"> 1656</span> : requires is_assignable_v&lt;const _T1&amp;, _T1&gt; &amp;&amp; is_assignable_v&lt;const _T2, _T2&gt;</span>
<span id="L1657"><span class="lineNum"> 1657</span> : {</span>
<span id="L1658"><span class="lineNum"> 1658</span> : this-&gt;_M_assign(std::move(__in));</span>
<span id="L1659"><span class="lineNum"> 1659</span> : return *this;</span>
<span id="L1660"><span class="lineNum"> 1660</span> : }</span>
<span id="L1661"><span class="lineNum"> 1661</span> : </span>
<span id="L1662"><span class="lineNum"> 1662</span> : template&lt;typename _U1, typename _U2&gt;</span>
<span id="L1663"><span class="lineNum"> 1663</span> : constexpr const tuple&amp;</span>
<span id="L1664"><span class="lineNum"> 1664</span> : operator=(const tuple&lt;_U1, _U2&gt;&amp; __in) const</span>
<span id="L1665"><span class="lineNum"> 1665</span> : requires is_assignable_v&lt;const _T1&amp;, const _U1&amp;&gt;</span>
<span id="L1666"><span class="lineNum"> 1666</span> : &amp;&amp; is_assignable_v&lt;const _T2&amp;, const _U2&amp;&gt;</span>
<span id="L1667"><span class="lineNum"> 1667</span> : {</span>
<span id="L1668"><span class="lineNum"> 1668</span> : this-&gt;_M_assign(__in);</span>
<span id="L1669"><span class="lineNum"> 1669</span> : return *this;</span>
<span id="L1670"><span class="lineNum"> 1670</span> : }</span>
<span id="L1671"><span class="lineNum"> 1671</span> : </span>
<span id="L1672"><span class="lineNum"> 1672</span> : template&lt;typename _U1, typename _U2&gt;</span>
<span id="L1673"><span class="lineNum"> 1673</span> : constexpr const tuple&amp;</span>
<span id="L1674"><span class="lineNum"> 1674</span> : operator=(tuple&lt;_U1, _U2&gt;&amp;&amp; __in) const</span>
<span id="L1675"><span class="lineNum"> 1675</span> : requires is_assignable_v&lt;const _T1&amp;, _U1&gt;</span>
<span id="L1676"><span class="lineNum"> 1676</span> : &amp;&amp; is_assignable_v&lt;const _T2&amp;, _U2&gt;</span>
<span id="L1677"><span class="lineNum"> 1677</span> : {</span>
<span id="L1678"><span class="lineNum"> 1678</span> : this-&gt;_M_assign(std::move(__in));</span>
<span id="L1679"><span class="lineNum"> 1679</span> : return *this;</span>
<span id="L1680"><span class="lineNum"> 1680</span> : }</span>
<span id="L1681"><span class="lineNum"> 1681</span> : #endif // C++23</span>
<span id="L1682"><span class="lineNum"> 1682</span> : </span>
<span id="L1683"><span class="lineNum"> 1683</span> : template&lt;typename _U1, typename _U2&gt;</span>
<span id="L1684"><span class="lineNum"> 1684</span> : _GLIBCXX20_CONSTEXPR</span>
<span id="L1685"><span class="lineNum"> 1685</span> : __enable_if_t&lt;__assignable&lt;const _U1&amp;, const _U2&amp;&gt;(), tuple&amp;&gt;</span>
<span id="L1686"><span class="lineNum"> 1686</span> : operator=(const pair&lt;_U1, _U2&gt;&amp; __in)</span>
<span id="L1687"><span class="lineNum"> 1687</span> : noexcept(__nothrow_assignable&lt;const _U1&amp;, const _U2&amp;&gt;())</span>
<span id="L1688"><span class="lineNum"> 1688</span> : {</span>
<span id="L1689"><span class="lineNum"> 1689</span> : this-&gt;_M_head(*this) = __in.first;</span>
<span id="L1690"><span class="lineNum"> 1690</span> : this-&gt;_M_tail(*this)._M_head(*this) = __in.second;</span>
<span id="L1691"><span class="lineNum"> 1691</span> : return *this;</span>
<span id="L1692"><span class="lineNum"> 1692</span> : }</span>
<span id="L1693"><span class="lineNum"> 1693</span> : </span>
<span id="L1694"><span class="lineNum"> 1694</span> : template&lt;typename _U1, typename _U2&gt;</span>
<span id="L1695"><span class="lineNum"> 1695</span> : _GLIBCXX20_CONSTEXPR</span>
<span id="L1696"><span class="lineNum"> 1696</span> : __enable_if_t&lt;__assignable&lt;_U1, _U2&gt;(), tuple&amp;&gt;</span>
<span id="L1697"><span class="lineNum"> 1697</span> : operator=(pair&lt;_U1, _U2&gt;&amp;&amp; __in)</span>
<span id="L1698"><span class="lineNum"> 1698</span> : noexcept(__nothrow_assignable&lt;_U1, _U2&gt;())</span>
<span id="L1699"><span class="lineNum"> 1699</span> : {</span>
<span id="L1700"><span class="lineNum"> 1700</span> : this-&gt;_M_head(*this) = std::forward&lt;_U1&gt;(__in.first);</span>
<span id="L1701"><span class="lineNum"> 1701</span> : this-&gt;_M_tail(*this)._M_head(*this) = std::forward&lt;_U2&gt;(__in.second);</span>
<span id="L1702"><span class="lineNum"> 1702</span> : return *this;</span>
<span id="L1703"><span class="lineNum"> 1703</span> : }</span>
<span id="L1704"><span class="lineNum"> 1704</span> : </span>
<span id="L1705"><span class="lineNum"> 1705</span> : #if __cplusplus &gt; 202002L</span>
<span id="L1706"><span class="lineNum"> 1706</span> : template&lt;typename _U1, typename _U2&gt;</span>
<span id="L1707"><span class="lineNum"> 1707</span> : constexpr const tuple&amp;</span>
<span id="L1708"><span class="lineNum"> 1708</span> : operator=(const pair&lt;_U1, _U2&gt;&amp; __in) const</span>
<span id="L1709"><span class="lineNum"> 1709</span> : requires is_assignable_v&lt;const _T1&amp;, const _U1&amp;&gt;</span>
<span id="L1710"><span class="lineNum"> 1710</span> : &amp;&amp; is_assignable_v&lt;const _T2&amp;, const _U2&amp;&gt;</span>
<span id="L1711"><span class="lineNum"> 1711</span> : {</span>
<span id="L1712"><span class="lineNum"> 1712</span> : this-&gt;_M_head(*this) = __in.first;</span>
<span id="L1713"><span class="lineNum"> 1713</span> : this-&gt;_M_tail(*this)._M_head(*this) = __in.second;</span>
<span id="L1714"><span class="lineNum"> 1714</span> : return *this;</span>
<span id="L1715"><span class="lineNum"> 1715</span> : }</span>
<span id="L1716"><span class="lineNum"> 1716</span> : </span>
<span id="L1717"><span class="lineNum"> 1717</span> : template&lt;typename _U1, typename _U2&gt;</span>
<span id="L1718"><span class="lineNum"> 1718</span> : constexpr const tuple&amp;</span>
<span id="L1719"><span class="lineNum"> 1719</span> : operator=(pair&lt;_U1, _U2&gt;&amp;&amp; __in) const</span>
<span id="L1720"><span class="lineNum"> 1720</span> : requires is_assignable_v&lt;const _T1&amp;, _U1&gt;</span>
<span id="L1721"><span class="lineNum"> 1721</span> : &amp;&amp; is_assignable_v&lt;const _T2&amp;, _U2&gt;</span>
<span id="L1722"><span class="lineNum"> 1722</span> : {</span>
<span id="L1723"><span class="lineNum"> 1723</span> : this-&gt;_M_head(*this) = std::forward&lt;_U1&gt;(__in.first);</span>
<span id="L1724"><span class="lineNum"> 1724</span> : this-&gt;_M_tail(*this)._M_head(*this) = std::forward&lt;_U2&gt;(__in.second);</span>
<span id="L1725"><span class="lineNum"> 1725</span> : return *this;</span>
<span id="L1726"><span class="lineNum"> 1726</span> : }</span>
<span id="L1727"><span class="lineNum"> 1727</span> : #endif // C++23</span>
<span id="L1728"><span class="lineNum"> 1728</span> : </span>
<span id="L1729"><span class="lineNum"> 1729</span> : _GLIBCXX20_CONSTEXPR</span>
<span id="L1730"><span class="lineNum"> 1730</span> : void</span>
<span id="L1731"><span class="lineNum"> 1731</span> : swap(tuple&amp; __in)</span>
<span id="L1732"><span class="lineNum"> 1732</span> : noexcept(__and_&lt;__is_nothrow_swappable&lt;_T1&gt;,</span>
<span id="L1733"><span class="lineNum"> 1733</span> : __is_nothrow_swappable&lt;_T2&gt;&gt;::value)</span>
<span id="L1734"><span class="lineNum"> 1734</span> : { _Inherited::_M_swap(__in); }</span>
<span id="L1735"><span class="lineNum"> 1735</span> : </span>
<span id="L1736"><span class="lineNum"> 1736</span> : #if __cplusplus &gt; 202002L</span>
<span id="L1737"><span class="lineNum"> 1737</span> : constexpr void</span>
<span id="L1738"><span class="lineNum"> 1738</span> : swap(const tuple&amp; __in) const</span>
<span id="L1739"><span class="lineNum"> 1739</span> : noexcept(__and_v&lt;__is_nothrow_swappable&lt;const _T1&gt;,</span>
<span id="L1740"><span class="lineNum"> 1740</span> : __is_nothrow_swappable&lt;const _T2&gt;&gt;)</span>
<span id="L1741"><span class="lineNum"> 1741</span> : requires is_swappable_v&lt;const _T1&gt; &amp;&amp; is_swappable_v&lt;const _T2&gt;</span>
<span id="L1742"><span class="lineNum"> 1742</span> : { _Inherited::_M_swap(__in); }</span>
<span id="L1743"><span class="lineNum"> 1743</span> : #endif // C++23</span>
<span id="L1744"><span class="lineNum"> 1744</span> : };</span>
<span id="L1745"><span class="lineNum"> 1745</span> : </span>
<span id="L1746"><span class="lineNum"> 1746</span> : </span>
<span id="L1747"><span class="lineNum"> 1747</span> : /// class tuple_size</span>
<span id="L1748"><span class="lineNum"> 1748</span> : template&lt;typename... _Elements&gt;</span>
<span id="L1749"><span class="lineNum"> 1749</span> : struct tuple_size&lt;tuple&lt;_Elements...&gt;&gt;</span>
<span id="L1750"><span class="lineNum"> 1750</span> : : public integral_constant&lt;size_t, sizeof...(_Elements)&gt; { };</span>
<span id="L1751"><span class="lineNum"> 1751</span> : </span>
<span id="L1752"><span class="lineNum"> 1752</span> : #if __cplusplus &gt;= 201703L</span>
<span id="L1753"><span class="lineNum"> 1753</span> : template&lt;typename... _Types&gt;</span>
<span id="L1754"><span class="lineNum"> 1754</span> : inline constexpr size_t tuple_size_v&lt;tuple&lt;_Types...&gt;&gt;</span>
<span id="L1755"><span class="lineNum"> 1755</span> : = sizeof...(_Types);</span>
<span id="L1756"><span class="lineNum"> 1756</span> : </span>
<span id="L1757"><span class="lineNum"> 1757</span> : template&lt;typename... _Types&gt;</span>
<span id="L1758"><span class="lineNum"> 1758</span> : inline constexpr size_t tuple_size_v&lt;const tuple&lt;_Types...&gt;&gt;</span>
<span id="L1759"><span class="lineNum"> 1759</span> : = sizeof...(_Types);</span>
<span id="L1760"><span class="lineNum"> 1760</span> : #endif</span>
<span id="L1761"><span class="lineNum"> 1761</span> : </span>
<span id="L1762"><span class="lineNum"> 1762</span> : /// Trait to get the Ith element type from a tuple.</span>
<span id="L1763"><span class="lineNum"> 1763</span> : template&lt;size_t __i, typename... _Types&gt;</span>
<span id="L1764"><span class="lineNum"> 1764</span> : struct tuple_element&lt;__i, tuple&lt;_Types...&gt;&gt;</span>
<span id="L1765"><span class="lineNum"> 1765</span> : {</span>
<span id="L1766"><span class="lineNum"> 1766</span> : static_assert(__i &lt; sizeof...(_Types), &quot;tuple index must be in range&quot;);</span>
<span id="L1767"><span class="lineNum"> 1767</span> : </span>
<span id="L1768"><span class="lineNum"> 1768</span> : using type = typename _Nth_type&lt;__i, _Types...&gt;::type;</span>
<span id="L1769"><span class="lineNum"> 1769</span> : };</span>
<span id="L1770"><span class="lineNum"> 1770</span> : </span>
<span id="L1771"><span class="lineNum"> 1771</span> : template&lt;size_t __i, typename _Head, typename... _Tail&gt;</span>
<span id="L1772"><span class="lineNum"> 1772</span> : constexpr _Head&amp;</span>
<span id="L1773"><span class="lineNum"> 1773</span> <span class="tlaGNC"> 17270032 : __get_helper(_Tuple_impl&lt;__i, _Head, _Tail...&gt;&amp; __t) noexcept</span></span>
<span id="L1774"><span class="lineNum"> 1774</span> <span class="tlaGNC"> 17270032 : { return _Tuple_impl&lt;__i, _Head, _Tail...&gt;::_M_head(__t); }</span></span>
<span id="L1775"><span class="lineNum"> 1775</span> : </span>
<span id="L1776"><span class="lineNum"> 1776</span> : template&lt;size_t __i, typename _Head, typename... _Tail&gt;</span>
<span id="L1777"><span class="lineNum"> 1777</span> : constexpr const _Head&amp;</span>
<span id="L1778"><span class="lineNum"> 1778</span> <span class="tlaGNC"> 31996304 : __get_helper(const _Tuple_impl&lt;__i, _Head, _Tail...&gt;&amp; __t) noexcept</span></span>
<span id="L1779"><span class="lineNum"> 1779</span> <span class="tlaGNC"> 31996304 : { return _Tuple_impl&lt;__i, _Head, _Tail...&gt;::_M_head(__t); }</span></span>
<span id="L1780"><span class="lineNum"> 1780</span> : </span>
<span id="L1781"><span class="lineNum"> 1781</span> : // Deleted overload to improve diagnostics for invalid indices</span>
<span id="L1782"><span class="lineNum"> 1782</span> : template&lt;size_t __i, typename... _Types&gt;</span>
<span id="L1783"><span class="lineNum"> 1783</span> : __enable_if_t&lt;(__i &gt;= sizeof...(_Types))&gt;</span>
<span id="L1784"><span class="lineNum"> 1784</span> : __get_helper(const tuple&lt;_Types...&gt;&amp;) = delete;</span>
<span id="L1785"><span class="lineNum"> 1785</span> : </span>
<span id="L1786"><span class="lineNum"> 1786</span> : /// Return a reference to the ith element of a tuple.</span>
<span id="L1787"><span class="lineNum"> 1787</span> : template&lt;size_t __i, typename... _Elements&gt;</span>
<span id="L1788"><span class="lineNum"> 1788</span> : constexpr __tuple_element_t&lt;__i, tuple&lt;_Elements...&gt;&gt;&amp;</span>
<span id="L1789"><span class="lineNum"> 1789</span> <span class="tlaGNC"> 15664298 : get(tuple&lt;_Elements...&gt;&amp; __t) noexcept</span></span>
<span id="L1790"><span class="lineNum"> 1790</span> <span class="tlaGNC"> 15664298 : { return std::__get_helper&lt;__i&gt;(__t); }</span></span>
<span id="L1791"><span class="lineNum"> 1791</span> : </span>
<span id="L1792"><span class="lineNum"> 1792</span> : /// Return a const reference to the ith element of a const tuple.</span>
<span id="L1793"><span class="lineNum"> 1793</span> : template&lt;size_t __i, typename... _Elements&gt;</span>
<span id="L1794"><span class="lineNum"> 1794</span> : constexpr const __tuple_element_t&lt;__i, tuple&lt;_Elements...&gt;&gt;&amp;</span>
<span id="L1795"><span class="lineNum"> 1795</span> <span class="tlaGNC"> 31996304 : get(const tuple&lt;_Elements...&gt;&amp; __t) noexcept</span></span>
<span id="L1796"><span class="lineNum"> 1796</span> <span class="tlaGNC"> 31996304 : { return std::__get_helper&lt;__i&gt;(__t); }</span></span>
<span id="L1797"><span class="lineNum"> 1797</span> : </span>
<span id="L1798"><span class="lineNum"> 1798</span> : /// Return an rvalue reference to the ith element of a tuple rvalue.</span>
<span id="L1799"><span class="lineNum"> 1799</span> : template&lt;size_t __i, typename... _Elements&gt;</span>
<span id="L1800"><span class="lineNum"> 1800</span> : constexpr __tuple_element_t&lt;__i, tuple&lt;_Elements...&gt;&gt;&amp;&amp;</span>
<span id="L1801"><span class="lineNum"> 1801</span> <span class="tlaGNC"> 1605734 : get(tuple&lt;_Elements...&gt;&amp;&amp; __t) noexcept</span></span>
<span id="L1802"><span class="lineNum"> 1802</span> : {</span>
<span id="L1803"><span class="lineNum"> 1803</span> : typedef __tuple_element_t&lt;__i, tuple&lt;_Elements...&gt;&gt; __element_type;</span>
<span id="L1804"><span class="lineNum"> 1804</span> <span class="tlaGNC"> 1605734 : return std::forward&lt;__element_type&gt;(std::__get_helper&lt;__i&gt;(__t));</span></span>
<span id="L1805"><span class="lineNum"> 1805</span> : }</span>
<span id="L1806"><span class="lineNum"> 1806</span> : </span>
<span id="L1807"><span class="lineNum"> 1807</span> : /// Return a const rvalue reference to the ith element of a const tuple rvalue.</span>
<span id="L1808"><span class="lineNum"> 1808</span> : template&lt;size_t __i, typename... _Elements&gt;</span>
<span id="L1809"><span class="lineNum"> 1809</span> : constexpr const __tuple_element_t&lt;__i, tuple&lt;_Elements...&gt;&gt;&amp;&amp;</span>
<span id="L1810"><span class="lineNum"> 1810</span> : get(const tuple&lt;_Elements...&gt;&amp;&amp; __t) noexcept</span>
<span id="L1811"><span class="lineNum"> 1811</span> : {</span>
<span id="L1812"><span class="lineNum"> 1812</span> : typedef __tuple_element_t&lt;__i, tuple&lt;_Elements...&gt;&gt; __element_type;</span>
<span id="L1813"><span class="lineNum"> 1813</span> : return std::forward&lt;const __element_type&gt;(std::__get_helper&lt;__i&gt;(__t));</span>
<span id="L1814"><span class="lineNum"> 1814</span> : }</span>
<span id="L1815"><span class="lineNum"> 1815</span> : </span>
<span id="L1816"><span class="lineNum"> 1816</span> : /// @cond undocumented</span>
<span id="L1817"><span class="lineNum"> 1817</span> : // Deleted overload chosen for invalid indices.</span>
<span id="L1818"><span class="lineNum"> 1818</span> : template&lt;size_t __i, typename... _Elements&gt;</span>
<span id="L1819"><span class="lineNum"> 1819</span> : constexpr __enable_if_t&lt;(__i &gt;= sizeof...(_Elements))&gt;</span>
<span id="L1820"><span class="lineNum"> 1820</span> : get(const tuple&lt;_Elements...&gt;&amp;) = delete;</span>
<span id="L1821"><span class="lineNum"> 1821</span> : /// @endcond</span>
<span id="L1822"><span class="lineNum"> 1822</span> : </span>
<span id="L1823"><span class="lineNum"> 1823</span> : #if __cplusplus &gt;= 201402L</span>
<span id="L1824"><span class="lineNum"> 1824</span> : </span>
<span id="L1825"><span class="lineNum"> 1825</span> : #define __cpp_lib_tuples_by_type 201304L</span>
<span id="L1826"><span class="lineNum"> 1826</span> : </span>
<span id="L1827"><span class="lineNum"> 1827</span> : /// Return a reference to the unique element of type _Tp of a tuple.</span>
<span id="L1828"><span class="lineNum"> 1828</span> : template &lt;typename _Tp, typename... _Types&gt;</span>
<span id="L1829"><span class="lineNum"> 1829</span> : constexpr _Tp&amp;</span>
<span id="L1830"><span class="lineNum"> 1830</span> : get(tuple&lt;_Types...&gt;&amp; __t) noexcept</span>
<span id="L1831"><span class="lineNum"> 1831</span> : {</span>
<span id="L1832"><span class="lineNum"> 1832</span> : constexpr size_t __idx = __find_uniq_type_in_pack&lt;_Tp, _Types...&gt;();</span>
<span id="L1833"><span class="lineNum"> 1833</span> : static_assert(__idx &lt; sizeof...(_Types),</span>
<span id="L1834"><span class="lineNum"> 1834</span> : &quot;the type T in std::get&lt;T&gt; must occur exactly once in the tuple&quot;);</span>
<span id="L1835"><span class="lineNum"> 1835</span> : return std::__get_helper&lt;__idx&gt;(__t);</span>
<span id="L1836"><span class="lineNum"> 1836</span> : }</span>
<span id="L1837"><span class="lineNum"> 1837</span> : </span>
<span id="L1838"><span class="lineNum"> 1838</span> : /// Return a reference to the unique element of type _Tp of a tuple rvalue.</span>
<span id="L1839"><span class="lineNum"> 1839</span> : template &lt;typename _Tp, typename... _Types&gt;</span>
<span id="L1840"><span class="lineNum"> 1840</span> : constexpr _Tp&amp;&amp;</span>
<span id="L1841"><span class="lineNum"> 1841</span> : get(tuple&lt;_Types...&gt;&amp;&amp; __t) noexcept</span>
<span id="L1842"><span class="lineNum"> 1842</span> : {</span>
<span id="L1843"><span class="lineNum"> 1843</span> : constexpr size_t __idx = __find_uniq_type_in_pack&lt;_Tp, _Types...&gt;();</span>
<span id="L1844"><span class="lineNum"> 1844</span> : static_assert(__idx &lt; sizeof...(_Types),</span>
<span id="L1845"><span class="lineNum"> 1845</span> : &quot;the type T in std::get&lt;T&gt; must occur exactly once in the tuple&quot;);</span>
<span id="L1846"><span class="lineNum"> 1846</span> : return std::forward&lt;_Tp&gt;(std::__get_helper&lt;__idx&gt;(__t));</span>
<span id="L1847"><span class="lineNum"> 1847</span> : }</span>
<span id="L1848"><span class="lineNum"> 1848</span> : </span>
<span id="L1849"><span class="lineNum"> 1849</span> : /// Return a const reference to the unique element of type _Tp of a tuple.</span>
<span id="L1850"><span class="lineNum"> 1850</span> : template &lt;typename _Tp, typename... _Types&gt;</span>
<span id="L1851"><span class="lineNum"> 1851</span> : constexpr const _Tp&amp;</span>
<span id="L1852"><span class="lineNum"> 1852</span> : get(const tuple&lt;_Types...&gt;&amp; __t) noexcept</span>
<span id="L1853"><span class="lineNum"> 1853</span> : {</span>
<span id="L1854"><span class="lineNum"> 1854</span> : constexpr size_t __idx = __find_uniq_type_in_pack&lt;_Tp, _Types...&gt;();</span>
<span id="L1855"><span class="lineNum"> 1855</span> : static_assert(__idx &lt; sizeof...(_Types),</span>
<span id="L1856"><span class="lineNum"> 1856</span> : &quot;the type T in std::get&lt;T&gt; must occur exactly once in the tuple&quot;);</span>
<span id="L1857"><span class="lineNum"> 1857</span> : return std::__get_helper&lt;__idx&gt;(__t);</span>
<span id="L1858"><span class="lineNum"> 1858</span> : }</span>
<span id="L1859"><span class="lineNum"> 1859</span> : </span>
<span id="L1860"><span class="lineNum"> 1860</span> : /// Return a const reference to the unique element of type _Tp of</span>
<span id="L1861"><span class="lineNum"> 1861</span> : /// a const tuple rvalue.</span>
<span id="L1862"><span class="lineNum"> 1862</span> : template &lt;typename _Tp, typename... _Types&gt;</span>
<span id="L1863"><span class="lineNum"> 1863</span> : constexpr const _Tp&amp;&amp;</span>
<span id="L1864"><span class="lineNum"> 1864</span> : get(const tuple&lt;_Types...&gt;&amp;&amp; __t) noexcept</span>
<span id="L1865"><span class="lineNum"> 1865</span> : {</span>
<span id="L1866"><span class="lineNum"> 1866</span> : constexpr size_t __idx = __find_uniq_type_in_pack&lt;_Tp, _Types...&gt;();</span>
<span id="L1867"><span class="lineNum"> 1867</span> : static_assert(__idx &lt; sizeof...(_Types),</span>
<span id="L1868"><span class="lineNum"> 1868</span> : &quot;the type T in std::get&lt;T&gt; must occur exactly once in the tuple&quot;);</span>
<span id="L1869"><span class="lineNum"> 1869</span> : return std::forward&lt;const _Tp&gt;(std::__get_helper&lt;__idx&gt;(__t));</span>
<span id="L1870"><span class="lineNum"> 1870</span> : }</span>
<span id="L1871"><span class="lineNum"> 1871</span> : #endif</span>
<span id="L1872"><span class="lineNum"> 1872</span> : </span>
<span id="L1873"><span class="lineNum"> 1873</span> : // This class performs the comparison operations on tuples</span>
<span id="L1874"><span class="lineNum"> 1874</span> : template&lt;typename _Tp, typename _Up, size_t __i, size_t __size&gt;</span>
<span id="L1875"><span class="lineNum"> 1875</span> : struct __tuple_compare</span>
<span id="L1876"><span class="lineNum"> 1876</span> : {</span>
<span id="L1877"><span class="lineNum"> 1877</span> : static constexpr bool</span>
<span id="L1878"><span class="lineNum"> 1878</span> <span class="tlaUNC tlaBgUNC"> 0 : __eq(const _Tp&amp; __t, const _Up&amp; __u)</span></span>
<span id="L1879"><span class="lineNum"> 1879</span> : {</span>
<span id="L1880"><span class="lineNum"> 1880</span> <span class="tlaUNC"> 0 : return bool(std::get&lt;__i&gt;(__t) == std::get&lt;__i&gt;(__u))</span></span>
<span id="L1881"><span class="lineNum"> 1881</span> <span class="tlaUNC"> 0 : &amp;&amp; __tuple_compare&lt;_Tp, _Up, __i + 1, __size&gt;::__eq(__t, __u);</span></span>
<span id="L1882"><span class="lineNum"> 1882</span> : }</span>
<span id="L1883"><span class="lineNum"> 1883</span> : </span>
<span id="L1884"><span class="lineNum"> 1884</span> : static constexpr bool</span>
<span id="L1885"><span class="lineNum"> 1885</span> : __less(const _Tp&amp; __t, const _Up&amp; __u)</span>
<span id="L1886"><span class="lineNum"> 1886</span> : {</span>
<span id="L1887"><span class="lineNum"> 1887</span> : return bool(std::get&lt;__i&gt;(__t) &lt; std::get&lt;__i&gt;(__u))</span>
<span id="L1888"><span class="lineNum"> 1888</span> : || (!bool(std::get&lt;__i&gt;(__u) &lt; std::get&lt;__i&gt;(__t))</span>
<span id="L1889"><span class="lineNum"> 1889</span> : &amp;&amp; __tuple_compare&lt;_Tp, _Up, __i + 1, __size&gt;::__less(__t, __u));</span>
<span id="L1890"><span class="lineNum"> 1890</span> : }</span>
<span id="L1891"><span class="lineNum"> 1891</span> : };</span>
<span id="L1892"><span class="lineNum"> 1892</span> : </span>
<span id="L1893"><span class="lineNum"> 1893</span> : template&lt;typename _Tp, typename _Up, size_t __size&gt;</span>
<span id="L1894"><span class="lineNum"> 1894</span> : struct __tuple_compare&lt;_Tp, _Up, __size, __size&gt;</span>
<span id="L1895"><span class="lineNum"> 1895</span> : {</span>
<span id="L1896"><span class="lineNum"> 1896</span> : static constexpr bool</span>
<span id="L1897"><span class="lineNum"> 1897</span> <span class="tlaUNC"> 0 : __eq(const _Tp&amp;, const _Up&amp;) { return true; }</span></span>
<span id="L1898"><span class="lineNum"> 1898</span> : </span>
<span id="L1899"><span class="lineNum"> 1899</span> : static constexpr bool</span>
<span id="L1900"><span class="lineNum"> 1900</span> : __less(const _Tp&amp;, const _Up&amp;) { return false; }</span>
<span id="L1901"><span class="lineNum"> 1901</span> : };</span>
<span id="L1902"><span class="lineNum"> 1902</span> : </span>
<span id="L1903"><span class="lineNum"> 1903</span> : template&lt;typename... _TElements, typename... _UElements&gt;</span>
<span id="L1904"><span class="lineNum"> 1904</span> : constexpr bool</span>
<span id="L1905"><span class="lineNum"> 1905</span> <span class="tlaUNC"> 0 : operator==(const tuple&lt;_TElements...&gt;&amp; __t,</span></span>
<span id="L1906"><span class="lineNum"> 1906</span> : const tuple&lt;_UElements...&gt;&amp; __u)</span>
<span id="L1907"><span class="lineNum"> 1907</span> : {</span>
<span id="L1908"><span class="lineNum"> 1908</span> : static_assert(sizeof...(_TElements) == sizeof...(_UElements),</span>
<span id="L1909"><span class="lineNum"> 1909</span> : &quot;tuple objects can only be compared if they have equal sizes.&quot;);</span>
<span id="L1910"><span class="lineNum"> 1910</span> : using __compare = __tuple_compare&lt;tuple&lt;_TElements...&gt;,</span>
<span id="L1911"><span class="lineNum"> 1911</span> : tuple&lt;_UElements...&gt;,</span>
<span id="L1912"><span class="lineNum"> 1912</span> : 0, sizeof...(_TElements)&gt;;</span>
<span id="L1913"><span class="lineNum"> 1913</span> <span class="tlaUNC"> 0 : return __compare::__eq(__t, __u);</span></span>
<span id="L1914"><span class="lineNum"> 1914</span> : }</span>
<span id="L1915"><span class="lineNum"> 1915</span> : </span>
<span id="L1916"><span class="lineNum"> 1916</span> : #if __cpp_lib_three_way_comparison</span>
<span id="L1917"><span class="lineNum"> 1917</span> : template&lt;typename _Cat, typename _Tp, typename _Up&gt;</span>
<span id="L1918"><span class="lineNum"> 1918</span> : constexpr _Cat</span>
<span id="L1919"><span class="lineNum"> 1919</span> : __tuple_cmp(const _Tp&amp;, const _Up&amp;, index_sequence&lt;&gt;)</span>
<span id="L1920"><span class="lineNum"> 1920</span> : { return _Cat::equivalent; }</span>
<span id="L1921"><span class="lineNum"> 1921</span> : </span>
<span id="L1922"><span class="lineNum"> 1922</span> : template&lt;typename _Cat, typename _Tp, typename _Up,</span>
<span id="L1923"><span class="lineNum"> 1923</span> : size_t _Idx0, size_t... _Idxs&gt;</span>
<span id="L1924"><span class="lineNum"> 1924</span> : constexpr _Cat</span>
<span id="L1925"><span class="lineNum"> 1925</span> : __tuple_cmp(const _Tp&amp; __t, const _Up&amp; __u,</span>
<span id="L1926"><span class="lineNum"> 1926</span> : index_sequence&lt;_Idx0, _Idxs...&gt;)</span>
<span id="L1927"><span class="lineNum"> 1927</span> : {</span>
<span id="L1928"><span class="lineNum"> 1928</span> : auto __c</span>
<span id="L1929"><span class="lineNum"> 1929</span> : = __detail::__synth3way(std::get&lt;_Idx0&gt;(__t), std::get&lt;_Idx0&gt;(__u));</span>
<span id="L1930"><span class="lineNum"> 1930</span> : if (__c != 0)</span>
<span id="L1931"><span class="lineNum"> 1931</span> : return __c;</span>
<span id="L1932"><span class="lineNum"> 1932</span> : return std::__tuple_cmp&lt;_Cat&gt;(__t, __u, index_sequence&lt;_Idxs...&gt;());</span>
<span id="L1933"><span class="lineNum"> 1933</span> : }</span>
<span id="L1934"><span class="lineNum"> 1934</span> : </span>
<span id="L1935"><span class="lineNum"> 1935</span> : template&lt;typename... _Tps, typename... _Ups&gt;</span>
<span id="L1936"><span class="lineNum"> 1936</span> : constexpr</span>
<span id="L1937"><span class="lineNum"> 1937</span> : common_comparison_category_t&lt;__detail::__synth3way_t&lt;_Tps, _Ups&gt;...&gt;</span>
<span id="L1938"><span class="lineNum"> 1938</span> : operator&lt;=&gt;(const tuple&lt;_Tps...&gt;&amp; __t, const tuple&lt;_Ups...&gt;&amp; __u)</span>
<span id="L1939"><span class="lineNum"> 1939</span> : {</span>
<span id="L1940"><span class="lineNum"> 1940</span> : using _Cat</span>
<span id="L1941"><span class="lineNum"> 1941</span> : = common_comparison_category_t&lt;__detail::__synth3way_t&lt;_Tps, _Ups&gt;...&gt;;</span>
<span id="L1942"><span class="lineNum"> 1942</span> : return std::__tuple_cmp&lt;_Cat&gt;(__t, __u, index_sequence_for&lt;_Tps...&gt;());</span>
<span id="L1943"><span class="lineNum"> 1943</span> : }</span>
<span id="L1944"><span class="lineNum"> 1944</span> : #else</span>
<span id="L1945"><span class="lineNum"> 1945</span> : template&lt;typename... _TElements, typename... _UElements&gt;</span>
<span id="L1946"><span class="lineNum"> 1946</span> : constexpr bool</span>
<span id="L1947"><span class="lineNum"> 1947</span> : operator&lt;(const tuple&lt;_TElements...&gt;&amp; __t,</span>
<span id="L1948"><span class="lineNum"> 1948</span> : const tuple&lt;_UElements...&gt;&amp; __u)</span>
<span id="L1949"><span class="lineNum"> 1949</span> : {</span>
<span id="L1950"><span class="lineNum"> 1950</span> : static_assert(sizeof...(_TElements) == sizeof...(_UElements),</span>
<span id="L1951"><span class="lineNum"> 1951</span> : &quot;tuple objects can only be compared if they have equal sizes.&quot;);</span>
<span id="L1952"><span class="lineNum"> 1952</span> : using __compare = __tuple_compare&lt;tuple&lt;_TElements...&gt;,</span>
<span id="L1953"><span class="lineNum"> 1953</span> : tuple&lt;_UElements...&gt;,</span>
<span id="L1954"><span class="lineNum"> 1954</span> : 0, sizeof...(_TElements)&gt;;</span>
<span id="L1955"><span class="lineNum"> 1955</span> : return __compare::__less(__t, __u);</span>
<span id="L1956"><span class="lineNum"> 1956</span> : }</span>
<span id="L1957"><span class="lineNum"> 1957</span> : </span>
<span id="L1958"><span class="lineNum"> 1958</span> : template&lt;typename... _TElements, typename... _UElements&gt;</span>
<span id="L1959"><span class="lineNum"> 1959</span> : constexpr bool</span>
<span id="L1960"><span class="lineNum"> 1960</span> : operator!=(const tuple&lt;_TElements...&gt;&amp; __t,</span>
<span id="L1961"><span class="lineNum"> 1961</span> : const tuple&lt;_UElements...&gt;&amp; __u)</span>
<span id="L1962"><span class="lineNum"> 1962</span> : { return !(__t == __u); }</span>
<span id="L1963"><span class="lineNum"> 1963</span> : </span>
<span id="L1964"><span class="lineNum"> 1964</span> : template&lt;typename... _TElements, typename... _UElements&gt;</span>
<span id="L1965"><span class="lineNum"> 1965</span> : constexpr bool</span>
<span id="L1966"><span class="lineNum"> 1966</span> : operator&gt;(const tuple&lt;_TElements...&gt;&amp; __t,</span>
<span id="L1967"><span class="lineNum"> 1967</span> : const tuple&lt;_UElements...&gt;&amp; __u)</span>
<span id="L1968"><span class="lineNum"> 1968</span> : { return __u &lt; __t; }</span>
<span id="L1969"><span class="lineNum"> 1969</span> : </span>
<span id="L1970"><span class="lineNum"> 1970</span> : template&lt;typename... _TElements, typename... _UElements&gt;</span>
<span id="L1971"><span class="lineNum"> 1971</span> : constexpr bool</span>
<span id="L1972"><span class="lineNum"> 1972</span> : operator&lt;=(const tuple&lt;_TElements...&gt;&amp; __t,</span>
<span id="L1973"><span class="lineNum"> 1973</span> : const tuple&lt;_UElements...&gt;&amp; __u)</span>
<span id="L1974"><span class="lineNum"> 1974</span> : { return !(__u &lt; __t); }</span>
<span id="L1975"><span class="lineNum"> 1975</span> : </span>
<span id="L1976"><span class="lineNum"> 1976</span> : template&lt;typename... _TElements, typename... _UElements&gt;</span>
<span id="L1977"><span class="lineNum"> 1977</span> : constexpr bool</span>
<span id="L1978"><span class="lineNum"> 1978</span> : operator&gt;=(const tuple&lt;_TElements...&gt;&amp; __t,</span>
<span id="L1979"><span class="lineNum"> 1979</span> : const tuple&lt;_UElements...&gt;&amp; __u)</span>
<span id="L1980"><span class="lineNum"> 1980</span> : { return !(__t &lt; __u); }</span>
<span id="L1981"><span class="lineNum"> 1981</span> : #endif // three_way_comparison</span>
<span id="L1982"><span class="lineNum"> 1982</span> : </span>
<span id="L1983"><span class="lineNum"> 1983</span> : // NB: DR 705.</span>
<span id="L1984"><span class="lineNum"> 1984</span> : /// Create a tuple containing copies of the arguments</span>
<span id="L1985"><span class="lineNum"> 1985</span> : template&lt;typename... _Elements&gt;</span>
<span id="L1986"><span class="lineNum"> 1986</span> : constexpr tuple&lt;typename __decay_and_strip&lt;_Elements&gt;::__type...&gt;</span>
<span id="L1987"><span class="lineNum"> 1987</span> : make_tuple(_Elements&amp;&amp;... __args)</span>
<span id="L1988"><span class="lineNum"> 1988</span> : {</span>
<span id="L1989"><span class="lineNum"> 1989</span> : typedef tuple&lt;typename __decay_and_strip&lt;_Elements&gt;::__type...&gt;</span>
<span id="L1990"><span class="lineNum"> 1990</span> : __result_type;</span>
<span id="L1991"><span class="lineNum"> 1991</span> : return __result_type(std::forward&lt;_Elements&gt;(__args)...);</span>
<span id="L1992"><span class="lineNum"> 1992</span> : }</span>
<span id="L1993"><span class="lineNum"> 1993</span> : </span>
<span id="L1994"><span class="lineNum"> 1994</span> : // _GLIBCXX_RESOLVE_LIB_DEFECTS</span>
<span id="L1995"><span class="lineNum"> 1995</span> : // 2275. Why is forward_as_tuple not constexpr?</span>
<span id="L1996"><span class="lineNum"> 1996</span> : /// Create a tuple of lvalue or rvalue references to the arguments</span>
<span id="L1997"><span class="lineNum"> 1997</span> : template&lt;typename... _Elements&gt;</span>
<span id="L1998"><span class="lineNum"> 1998</span> : constexpr tuple&lt;_Elements&amp;&amp;...&gt;</span>
<span id="L1999"><span class="lineNum"> 1999</span> <span class="tlaGNC tlaBgGNC"> 3129356 : forward_as_tuple(_Elements&amp;&amp;... __args) noexcept</span></span>
<span id="L2000"><span class="lineNum"> 2000</span> <span class="tlaGNC"> 3129356 : { return tuple&lt;_Elements&amp;&amp;...&gt;(std::forward&lt;_Elements&gt;(__args)...); }</span></span>
<span id="L2001"><span class="lineNum"> 2001</span> : </span>
<span id="L2002"><span class="lineNum"> 2002</span> : // Declarations of std::array and its std::get overloads, so that</span>
<span id="L2003"><span class="lineNum"> 2003</span> : // std::tuple_cat can use them if &lt;tuple&gt; is included before &lt;array&gt;.</span>
<span id="L2004"><span class="lineNum"> 2004</span> : </span>
<span id="L2005"><span class="lineNum"> 2005</span> : template&lt;typename _Tp, size_t _Nm&gt; struct array;</span>
<span id="L2006"><span class="lineNum"> 2006</span> : </span>
<span id="L2007"><span class="lineNum"> 2007</span> : template&lt;size_t _Int, typename _Tp, size_t _Nm&gt;</span>
<span id="L2008"><span class="lineNum"> 2008</span> : constexpr _Tp&amp;</span>
<span id="L2009"><span class="lineNum"> 2009</span> : get(array&lt;_Tp, _Nm&gt;&amp;) noexcept;</span>
<span id="L2010"><span class="lineNum"> 2010</span> : </span>
<span id="L2011"><span class="lineNum"> 2011</span> : template&lt;size_t _Int, typename _Tp, size_t _Nm&gt;</span>
<span id="L2012"><span class="lineNum"> 2012</span> : constexpr _Tp&amp;&amp;</span>
<span id="L2013"><span class="lineNum"> 2013</span> : get(array&lt;_Tp, _Nm&gt;&amp;&amp;) noexcept;</span>
<span id="L2014"><span class="lineNum"> 2014</span> : </span>
<span id="L2015"><span class="lineNum"> 2015</span> : template&lt;size_t _Int, typename _Tp, size_t _Nm&gt;</span>
<span id="L2016"><span class="lineNum"> 2016</span> : constexpr const _Tp&amp;</span>
<span id="L2017"><span class="lineNum"> 2017</span> : get(const array&lt;_Tp, _Nm&gt;&amp;) noexcept;</span>
<span id="L2018"><span class="lineNum"> 2018</span> : </span>
<span id="L2019"><span class="lineNum"> 2019</span> : template&lt;size_t _Int, typename _Tp, size_t _Nm&gt;</span>
<span id="L2020"><span class="lineNum"> 2020</span> : constexpr const _Tp&amp;&amp;</span>
<span id="L2021"><span class="lineNum"> 2021</span> : get(const array&lt;_Tp, _Nm&gt;&amp;&amp;) noexcept;</span>
<span id="L2022"><span class="lineNum"> 2022</span> : </span>
<span id="L2023"><span class="lineNum"> 2023</span> : /// @cond undocumented</span>
<span id="L2024"><span class="lineNum"> 2024</span> : template&lt;size_t, typename, typename, size_t&gt;</span>
<span id="L2025"><span class="lineNum"> 2025</span> : struct __make_tuple_impl;</span>
<span id="L2026"><span class="lineNum"> 2026</span> : </span>
<span id="L2027"><span class="lineNum"> 2027</span> : template&lt;size_t _Idx, typename _Tuple, typename... _Tp, size_t _Nm&gt;</span>
<span id="L2028"><span class="lineNum"> 2028</span> : struct __make_tuple_impl&lt;_Idx, tuple&lt;_Tp...&gt;, _Tuple, _Nm&gt;</span>
<span id="L2029"><span class="lineNum"> 2029</span> : : __make_tuple_impl&lt;_Idx + 1,</span>
<span id="L2030"><span class="lineNum"> 2030</span> : tuple&lt;_Tp..., __tuple_element_t&lt;_Idx, _Tuple&gt;&gt;,</span>
<span id="L2031"><span class="lineNum"> 2031</span> : _Tuple, _Nm&gt;</span>
<span id="L2032"><span class="lineNum"> 2032</span> : { };</span>
<span id="L2033"><span class="lineNum"> 2033</span> : </span>
<span id="L2034"><span class="lineNum"> 2034</span> : template&lt;size_t _Nm, typename _Tuple, typename... _Tp&gt;</span>
<span id="L2035"><span class="lineNum"> 2035</span> : struct __make_tuple_impl&lt;_Nm, tuple&lt;_Tp...&gt;, _Tuple, _Nm&gt;</span>
<span id="L2036"><span class="lineNum"> 2036</span> : {</span>
<span id="L2037"><span class="lineNum"> 2037</span> : typedef tuple&lt;_Tp...&gt; __type;</span>
<span id="L2038"><span class="lineNum"> 2038</span> : };</span>
<span id="L2039"><span class="lineNum"> 2039</span> : </span>
<span id="L2040"><span class="lineNum"> 2040</span> : template&lt;typename _Tuple&gt;</span>
<span id="L2041"><span class="lineNum"> 2041</span> : struct __do_make_tuple</span>
<span id="L2042"><span class="lineNum"> 2042</span> : : __make_tuple_impl&lt;0, tuple&lt;&gt;, _Tuple, tuple_size&lt;_Tuple&gt;::value&gt;</span>
<span id="L2043"><span class="lineNum"> 2043</span> : { };</span>
<span id="L2044"><span class="lineNum"> 2044</span> : </span>
<span id="L2045"><span class="lineNum"> 2045</span> : // Returns the std::tuple equivalent of a tuple-like type.</span>
<span id="L2046"><span class="lineNum"> 2046</span> : template&lt;typename _Tuple&gt;</span>
<span id="L2047"><span class="lineNum"> 2047</span> : struct __make_tuple</span>
<span id="L2048"><span class="lineNum"> 2048</span> : : public __do_make_tuple&lt;__remove_cvref_t&lt;_Tuple&gt;&gt;</span>
<span id="L2049"><span class="lineNum"> 2049</span> : { };</span>
<span id="L2050"><span class="lineNum"> 2050</span> : </span>
<span id="L2051"><span class="lineNum"> 2051</span> : // Combines several std::tuple's into a single one.</span>
<span id="L2052"><span class="lineNum"> 2052</span> : template&lt;typename...&gt;</span>
<span id="L2053"><span class="lineNum"> 2053</span> : struct __combine_tuples;</span>
<span id="L2054"><span class="lineNum"> 2054</span> : </span>
<span id="L2055"><span class="lineNum"> 2055</span> : template&lt;&gt;</span>
<span id="L2056"><span class="lineNum"> 2056</span> : struct __combine_tuples&lt;&gt;</span>
<span id="L2057"><span class="lineNum"> 2057</span> : {</span>
<span id="L2058"><span class="lineNum"> 2058</span> : typedef tuple&lt;&gt; __type;</span>
<span id="L2059"><span class="lineNum"> 2059</span> : };</span>
<span id="L2060"><span class="lineNum"> 2060</span> : </span>
<span id="L2061"><span class="lineNum"> 2061</span> : template&lt;typename... _Ts&gt;</span>
<span id="L2062"><span class="lineNum"> 2062</span> : struct __combine_tuples&lt;tuple&lt;_Ts...&gt;&gt;</span>
<span id="L2063"><span class="lineNum"> 2063</span> : {</span>
<span id="L2064"><span class="lineNum"> 2064</span> : typedef tuple&lt;_Ts...&gt; __type;</span>
<span id="L2065"><span class="lineNum"> 2065</span> : };</span>
<span id="L2066"><span class="lineNum"> 2066</span> : </span>
<span id="L2067"><span class="lineNum"> 2067</span> : template&lt;typename... _T1s, typename... _T2s, typename... _Rem&gt;</span>
<span id="L2068"><span class="lineNum"> 2068</span> : struct __combine_tuples&lt;tuple&lt;_T1s...&gt;, tuple&lt;_T2s...&gt;, _Rem...&gt;</span>
<span id="L2069"><span class="lineNum"> 2069</span> : {</span>
<span id="L2070"><span class="lineNum"> 2070</span> : typedef typename __combine_tuples&lt;tuple&lt;_T1s..., _T2s...&gt;,</span>
<span id="L2071"><span class="lineNum"> 2071</span> : _Rem...&gt;::__type __type;</span>
<span id="L2072"><span class="lineNum"> 2072</span> : };</span>
<span id="L2073"><span class="lineNum"> 2073</span> : </span>
<span id="L2074"><span class="lineNum"> 2074</span> : // Computes the result type of tuple_cat given a set of tuple-like types.</span>
<span id="L2075"><span class="lineNum"> 2075</span> : template&lt;typename... _Tpls&gt;</span>
<span id="L2076"><span class="lineNum"> 2076</span> : struct __tuple_cat_result</span>
<span id="L2077"><span class="lineNum"> 2077</span> : {</span>
<span id="L2078"><span class="lineNum"> 2078</span> : typedef typename __combine_tuples</span>
<span id="L2079"><span class="lineNum"> 2079</span> : &lt;typename __make_tuple&lt;_Tpls&gt;::__type...&gt;::__type __type;</span>
<span id="L2080"><span class="lineNum"> 2080</span> : };</span>
<span id="L2081"><span class="lineNum"> 2081</span> : </span>
<span id="L2082"><span class="lineNum"> 2082</span> : // Helper to determine the index set for the first tuple-like</span>
<span id="L2083"><span class="lineNum"> 2083</span> : // type of a given set.</span>
<span id="L2084"><span class="lineNum"> 2084</span> : template&lt;typename...&gt;</span>
<span id="L2085"><span class="lineNum"> 2085</span> : struct __make_1st_indices;</span>
<span id="L2086"><span class="lineNum"> 2086</span> : </span>
<span id="L2087"><span class="lineNum"> 2087</span> : template&lt;&gt;</span>
<span id="L2088"><span class="lineNum"> 2088</span> : struct __make_1st_indices&lt;&gt;</span>
<span id="L2089"><span class="lineNum"> 2089</span> : {</span>
<span id="L2090"><span class="lineNum"> 2090</span> : typedef _Index_tuple&lt;&gt; __type;</span>
<span id="L2091"><span class="lineNum"> 2091</span> : };</span>
<span id="L2092"><span class="lineNum"> 2092</span> : </span>
<span id="L2093"><span class="lineNum"> 2093</span> : template&lt;typename _Tp, typename... _Tpls&gt;</span>
<span id="L2094"><span class="lineNum"> 2094</span> : struct __make_1st_indices&lt;_Tp, _Tpls...&gt;</span>
<span id="L2095"><span class="lineNum"> 2095</span> : {</span>
<span id="L2096"><span class="lineNum"> 2096</span> : typedef typename _Build_index_tuple&lt;tuple_size&lt;</span>
<span id="L2097"><span class="lineNum"> 2097</span> : typename remove_reference&lt;_Tp&gt;::type&gt;::value&gt;::__type __type;</span>
<span id="L2098"><span class="lineNum"> 2098</span> : };</span>
<span id="L2099"><span class="lineNum"> 2099</span> : </span>
<span id="L2100"><span class="lineNum"> 2100</span> : // Performs the actual concatenation by step-wise expanding tuple-like</span>
<span id="L2101"><span class="lineNum"> 2101</span> : // objects into the elements, which are finally forwarded into the</span>
<span id="L2102"><span class="lineNum"> 2102</span> : // result tuple.</span>
<span id="L2103"><span class="lineNum"> 2103</span> : template&lt;typename _Ret, typename _Indices, typename... _Tpls&gt;</span>
<span id="L2104"><span class="lineNum"> 2104</span> : struct __tuple_concater;</span>
<span id="L2105"><span class="lineNum"> 2105</span> : </span>
<span id="L2106"><span class="lineNum"> 2106</span> : template&lt;typename _Ret, size_t... _Is, typename _Tp, typename... _Tpls&gt;</span>
<span id="L2107"><span class="lineNum"> 2107</span> : struct __tuple_concater&lt;_Ret, _Index_tuple&lt;_Is...&gt;, _Tp, _Tpls...&gt;</span>
<span id="L2108"><span class="lineNum"> 2108</span> : {</span>
<span id="L2109"><span class="lineNum"> 2109</span> : template&lt;typename... _Us&gt;</span>
<span id="L2110"><span class="lineNum"> 2110</span> : static constexpr _Ret</span>
<span id="L2111"><span class="lineNum"> 2111</span> : _S_do(_Tp&amp;&amp; __tp, _Tpls&amp;&amp;... __tps, _Us&amp;&amp;... __us)</span>
<span id="L2112"><span class="lineNum"> 2112</span> : {</span>
<span id="L2113"><span class="lineNum"> 2113</span> : typedef typename __make_1st_indices&lt;_Tpls...&gt;::__type __idx;</span>
<span id="L2114"><span class="lineNum"> 2114</span> : typedef __tuple_concater&lt;_Ret, __idx, _Tpls...&gt; __next;</span>
<span id="L2115"><span class="lineNum"> 2115</span> : return __next::_S_do(std::forward&lt;_Tpls&gt;(__tps)...,</span>
<span id="L2116"><span class="lineNum"> 2116</span> : std::forward&lt;_Us&gt;(__us)...,</span>
<span id="L2117"><span class="lineNum"> 2117</span> : std::get&lt;_Is&gt;(std::forward&lt;_Tp&gt;(__tp))...);</span>
<span id="L2118"><span class="lineNum"> 2118</span> : }</span>
<span id="L2119"><span class="lineNum"> 2119</span> : };</span>
<span id="L2120"><span class="lineNum"> 2120</span> : </span>
<span id="L2121"><span class="lineNum"> 2121</span> : template&lt;typename _Ret&gt;</span>
<span id="L2122"><span class="lineNum"> 2122</span> : struct __tuple_concater&lt;_Ret, _Index_tuple&lt;&gt;&gt;</span>
<span id="L2123"><span class="lineNum"> 2123</span> : {</span>
<span id="L2124"><span class="lineNum"> 2124</span> : template&lt;typename... _Us&gt;</span>
<span id="L2125"><span class="lineNum"> 2125</span> : static constexpr _Ret</span>
<span id="L2126"><span class="lineNum"> 2126</span> : _S_do(_Us&amp;&amp;... __us)</span>
<span id="L2127"><span class="lineNum"> 2127</span> : {</span>
<span id="L2128"><span class="lineNum"> 2128</span> : return _Ret(std::forward&lt;_Us&gt;(__us)...);</span>
<span id="L2129"><span class="lineNum"> 2129</span> : }</span>
<span id="L2130"><span class="lineNum"> 2130</span> : };</span>
<span id="L2131"><span class="lineNum"> 2131</span> : </span>
<span id="L2132"><span class="lineNum"> 2132</span> : template&lt;typename... _Tps&gt;</span>
<span id="L2133"><span class="lineNum"> 2133</span> : struct __is_tuple_like_impl&lt;tuple&lt;_Tps...&gt;&gt; : true_type</span>
<span id="L2134"><span class="lineNum"> 2134</span> : { };</span>
<span id="L2135"><span class="lineNum"> 2135</span> : /// @endcond</span>
<span id="L2136"><span class="lineNum"> 2136</span> : </span>
<span id="L2137"><span class="lineNum"> 2137</span> : /// Create a `tuple` containing all elements from multiple tuple-like objects</span>
<span id="L2138"><span class="lineNum"> 2138</span> : template&lt;typename... _Tpls, typename = typename</span>
<span id="L2139"><span class="lineNum"> 2139</span> : enable_if&lt;__and_&lt;__is_tuple_like&lt;_Tpls&gt;...&gt;::value&gt;::type&gt;</span>
<span id="L2140"><span class="lineNum"> 2140</span> : constexpr auto</span>
<span id="L2141"><span class="lineNum"> 2141</span> : tuple_cat(_Tpls&amp;&amp;... __tpls)</span>
<span id="L2142"><span class="lineNum"> 2142</span> : -&gt; typename __tuple_cat_result&lt;_Tpls...&gt;::__type</span>
<span id="L2143"><span class="lineNum"> 2143</span> : {</span>
<span id="L2144"><span class="lineNum"> 2144</span> : typedef typename __tuple_cat_result&lt;_Tpls...&gt;::__type __ret;</span>
<span id="L2145"><span class="lineNum"> 2145</span> : typedef typename __make_1st_indices&lt;_Tpls...&gt;::__type __idx;</span>
<span id="L2146"><span class="lineNum"> 2146</span> : typedef __tuple_concater&lt;__ret, __idx, _Tpls...&gt; __concater;</span>
<span id="L2147"><span class="lineNum"> 2147</span> : return __concater::_S_do(std::forward&lt;_Tpls&gt;(__tpls)...);</span>
<span id="L2148"><span class="lineNum"> 2148</span> : }</span>
<span id="L2149"><span class="lineNum"> 2149</span> : </span>
<span id="L2150"><span class="lineNum"> 2150</span> : // _GLIBCXX_RESOLVE_LIB_DEFECTS</span>
<span id="L2151"><span class="lineNum"> 2151</span> : // 2301. Why is tie not constexpr?</span>
<span id="L2152"><span class="lineNum"> 2152</span> : /// Return a tuple of lvalue references bound to the arguments</span>
<span id="L2153"><span class="lineNum"> 2153</span> : template&lt;typename... _Elements&gt;</span>
<span id="L2154"><span class="lineNum"> 2154</span> : constexpr tuple&lt;_Elements&amp;...&gt;</span>
<span id="L2155"><span class="lineNum"> 2155</span> <span class="tlaGNC"> 286 : tie(_Elements&amp;... __args) noexcept</span></span>
<span id="L2156"><span class="lineNum"> 2156</span> <span class="tlaGNC"> 286 : { return tuple&lt;_Elements&amp;...&gt;(__args...); }</span></span>
<span id="L2157"><span class="lineNum"> 2157</span> : </span>
<span id="L2158"><span class="lineNum"> 2158</span> : /// Exchange the values of two tuples</span>
<span id="L2159"><span class="lineNum"> 2159</span> : template&lt;typename... _Elements&gt;</span>
<span id="L2160"><span class="lineNum"> 2160</span> : _GLIBCXX20_CONSTEXPR</span>
<span id="L2161"><span class="lineNum"> 2161</span> : inline</span>
<span id="L2162"><span class="lineNum"> 2162</span> : #if __cplusplus &gt; 201402L || !defined(__STRICT_ANSI__) // c++1z or gnu++11</span>
<span id="L2163"><span class="lineNum"> 2163</span> : // Constrained free swap overload, see p0185r1</span>
<span id="L2164"><span class="lineNum"> 2164</span> : typename enable_if&lt;__and_&lt;__is_swappable&lt;_Elements&gt;...&gt;::value</span>
<span id="L2165"><span class="lineNum"> 2165</span> : &gt;::type</span>
<span id="L2166"><span class="lineNum"> 2166</span> : #else</span>
<span id="L2167"><span class="lineNum"> 2167</span> : void</span>
<span id="L2168"><span class="lineNum"> 2168</span> : #endif</span>
<span id="L2169"><span class="lineNum"> 2169</span> : swap(tuple&lt;_Elements...&gt;&amp; __x, tuple&lt;_Elements...&gt;&amp; __y)</span>
<span id="L2170"><span class="lineNum"> 2170</span> : noexcept(noexcept(__x.swap(__y)))</span>
<span id="L2171"><span class="lineNum"> 2171</span> : { __x.swap(__y); }</span>
<span id="L2172"><span class="lineNum"> 2172</span> : </span>
<span id="L2173"><span class="lineNum"> 2173</span> : #if __cplusplus &gt; 202002L</span>
<span id="L2174"><span class="lineNum"> 2174</span> : template&lt;typename... _Elements&gt;</span>
<span id="L2175"><span class="lineNum"> 2175</span> : requires (is_swappable_v&lt;const _Elements&gt; &amp;&amp; ...)</span>
<span id="L2176"><span class="lineNum"> 2176</span> : constexpr void</span>
<span id="L2177"><span class="lineNum"> 2177</span> : swap(const tuple&lt;_Elements...&gt;&amp; __x, const tuple&lt;_Elements...&gt;&amp; __y)</span>
<span id="L2178"><span class="lineNum"> 2178</span> : noexcept(noexcept(__x.swap(__y)))</span>
<span id="L2179"><span class="lineNum"> 2179</span> : { __x.swap(__y); }</span>
<span id="L2180"><span class="lineNum"> 2180</span> : #endif // C++23</span>
<span id="L2181"><span class="lineNum"> 2181</span> : </span>
<span id="L2182"><span class="lineNum"> 2182</span> : #if __cplusplus &gt; 201402L || !defined(__STRICT_ANSI__) // c++1z or gnu++11</span>
<span id="L2183"><span class="lineNum"> 2183</span> : /// Exchange the values of two const tuples (if const elements can be swapped)</span>
<span id="L2184"><span class="lineNum"> 2184</span> : template&lt;typename... _Elements&gt;</span>
<span id="L2185"><span class="lineNum"> 2185</span> : _GLIBCXX20_CONSTEXPR</span>
<span id="L2186"><span class="lineNum"> 2186</span> : typename enable_if&lt;!__and_&lt;__is_swappable&lt;_Elements&gt;...&gt;::value&gt;::type</span>
<span id="L2187"><span class="lineNum"> 2187</span> : swap(tuple&lt;_Elements...&gt;&amp;, tuple&lt;_Elements...&gt;&amp;) = delete;</span>
<span id="L2188"><span class="lineNum"> 2188</span> : #endif</span>
<span id="L2189"><span class="lineNum"> 2189</span> : </span>
<span id="L2190"><span class="lineNum"> 2190</span> : // A class (and instance) which can be used in 'tie' when an element</span>
<span id="L2191"><span class="lineNum"> 2191</span> : // of a tuple is not required.</span>
<span id="L2192"><span class="lineNum"> 2192</span> : // _GLIBCXX14_CONSTEXPR</span>
<span id="L2193"><span class="lineNum"> 2193</span> : // 2933. PR for LWG 2773 could be clearer</span>
<span id="L2194"><span class="lineNum"> 2194</span> : struct _Swallow_assign</span>
<span id="L2195"><span class="lineNum"> 2195</span> : {</span>
<span id="L2196"><span class="lineNum"> 2196</span> : template&lt;class _Tp&gt;</span>
<span id="L2197"><span class="lineNum"> 2197</span> : _GLIBCXX14_CONSTEXPR const _Swallow_assign&amp;</span>
<span id="L2198"><span class="lineNum"> 2198</span> : operator=(const _Tp&amp;) const</span>
<span id="L2199"><span class="lineNum"> 2199</span> : { return *this; }</span>
<span id="L2200"><span class="lineNum"> 2200</span> : };</span>
<span id="L2201"><span class="lineNum"> 2201</span> : </span>
<span id="L2202"><span class="lineNum"> 2202</span> : // _GLIBCXX_RESOLVE_LIB_DEFECTS</span>
<span id="L2203"><span class="lineNum"> 2203</span> : // 2773. Making std::ignore constexpr</span>
<span id="L2204"><span class="lineNum"> 2204</span> : /** Used with `std::tie` to ignore an element of a tuple</span>
<span id="L2205"><span class="lineNum"> 2205</span> : *</span>
<span id="L2206"><span class="lineNum"> 2206</span> : * When using `std::tie` to assign the elements of a tuple to variables,</span>
<span id="L2207"><span class="lineNum"> 2207</span> : * unwanted elements can be ignored by using `std::ignore`. For example:</span>
<span id="L2208"><span class="lineNum"> 2208</span> : *</span>
<span id="L2209"><span class="lineNum"> 2209</span> : * ```</span>
<span id="L2210"><span class="lineNum"> 2210</span> : * int x, y;</span>
<span id="L2211"><span class="lineNum"> 2211</span> : * std::tie(x, std::ignore, y) = std::make_tuple(1, 2, 3);</span>
<span id="L2212"><span class="lineNum"> 2212</span> : * ```</span>
<span id="L2213"><span class="lineNum"> 2213</span> : *</span>
<span id="L2214"><span class="lineNum"> 2214</span> : * This assignment will perform `x=1; std::ignore=2; y=3;` which results</span>
<span id="L2215"><span class="lineNum"> 2215</span> : * in the second element being ignored.</span>
<span id="L2216"><span class="lineNum"> 2216</span> : *</span>
<span id="L2217"><span class="lineNum"> 2217</span> : * @since C++11</span>
<span id="L2218"><span class="lineNum"> 2218</span> : */</span>
<span id="L2219"><span class="lineNum"> 2219</span> : _GLIBCXX17_INLINE constexpr _Swallow_assign ignore{};</span>
<span id="L2220"><span class="lineNum"> 2220</span> : </span>
<span id="L2221"><span class="lineNum"> 2221</span> : /// Partial specialization for tuples</span>
<span id="L2222"><span class="lineNum"> 2222</span> : template&lt;typename... _Types, typename _Alloc&gt;</span>
<span id="L2223"><span class="lineNum"> 2223</span> : struct uses_allocator&lt;tuple&lt;_Types...&gt;, _Alloc&gt; : true_type { };</span>
<span id="L2224"><span class="lineNum"> 2224</span> : </span>
<span id="L2225"><span class="lineNum"> 2225</span> : // See stl_pair.h...</span>
<span id="L2226"><span class="lineNum"> 2226</span> : /** &quot;piecewise construction&quot; using a tuple of arguments for each member.</span>
<span id="L2227"><span class="lineNum"> 2227</span> : *</span>
<span id="L2228"><span class="lineNum"> 2228</span> : * @param __first Arguments for the first member of the pair.</span>
<span id="L2229"><span class="lineNum"> 2229</span> : * @param __second Arguments for the second member of the pair.</span>
<span id="L2230"><span class="lineNum"> 2230</span> : *</span>
<span id="L2231"><span class="lineNum"> 2231</span> : * The elements of each tuple will be used as the constructor arguments</span>
<span id="L2232"><span class="lineNum"> 2232</span> : * for the data members of the pair.</span>
<span id="L2233"><span class="lineNum"> 2233</span> : */</span>
<span id="L2234"><span class="lineNum"> 2234</span> : template&lt;class _T1, class _T2&gt;</span>
<span id="L2235"><span class="lineNum"> 2235</span> : template&lt;typename... _Args1, typename... _Args2&gt;</span>
<span id="L2236"><span class="lineNum"> 2236</span> : _GLIBCXX20_CONSTEXPR</span>
<span id="L2237"><span class="lineNum"> 2237</span> : inline</span>
<span id="L2238"><span class="lineNum"> 2238</span> <span class="tlaGNC"> 10538856 : pair&lt;_T1, _T2&gt;::</span></span>
<span id="L2239"><span class="lineNum"> 2239</span> : pair(piecewise_construct_t,</span>
<span id="L2240"><span class="lineNum"> 2240</span> : tuple&lt;_Args1...&gt; __first, tuple&lt;_Args2...&gt; __second)</span>
<span id="L2241"><span class="lineNum"> 2241</span> : : pair(__first, __second,</span>
<span id="L2242"><span class="lineNum"> 2242</span> : typename _Build_index_tuple&lt;sizeof...(_Args1)&gt;::__type(),</span>
<span id="L2243"><span class="lineNum"> 2243</span> <span class="tlaGNC"> 10538856 : typename _Build_index_tuple&lt;sizeof...(_Args2)&gt;::__type())</span></span>
<span id="L2244"><span class="lineNum"> 2244</span> <span class="tlaGNC"> 10538856 : { }</span></span>
<span id="L2245"><span class="lineNum"> 2245</span> : </span>
<span id="L2246"><span class="lineNum"> 2246</span> : template&lt;class _T1, class _T2&gt;</span>
<span id="L2247"><span class="lineNum"> 2247</span> : template&lt;typename... _Args1, size_t... _Indexes1,</span>
<span id="L2248"><span class="lineNum"> 2248</span> : typename... _Args2, size_t... _Indexes2&gt;</span>
<span id="L2249"><span class="lineNum"> 2249</span> : _GLIBCXX20_CONSTEXPR inline</span>
<span id="L2250"><span class="lineNum"> 2250</span> <span class="tlaGNC"> 10538856 : pair&lt;_T1, _T2&gt;::</span></span>
<span id="L2251"><span class="lineNum"> 2251</span> : pair(tuple&lt;_Args1...&gt;&amp; __tuple1, tuple&lt;_Args2...&gt;&amp; __tuple2,</span>
<span id="L2252"><span class="lineNum"> 2252</span> : _Index_tuple&lt;_Indexes1...&gt;, _Index_tuple&lt;_Indexes2...&gt;)</span>
<span id="L2253"><span class="lineNum"> 2253</span> <span class="tlaGNC"> 10538856 : : first(std::forward&lt;_Args1&gt;(std::get&lt;_Indexes1&gt;(__tuple1))...),</span></span>
<span id="L2254"><span class="lineNum"> 2254</span> <span class="tlaGNC"> 10538856 : second(std::forward&lt;_Args2&gt;(std::get&lt;_Indexes2&gt;(__tuple2))...)</span></span>
<span id="L2255"><span class="lineNum"> 2255</span> <span class="tlaGNC"> 10538856 : { }</span></span>
<span id="L2256"><span class="lineNum"> 2256</span> : </span>
<span id="L2257"><span class="lineNum"> 2257</span> : #if __cplusplus &gt;= 201703L</span>
<span id="L2258"><span class="lineNum"> 2258</span> : </span>
<span id="L2259"><span class="lineNum"> 2259</span> : // Unpack a std::tuple into a type trait and use its value.</span>
<span id="L2260"><span class="lineNum"> 2260</span> : // For cv std::tuple&lt;_Up&gt; the result is _Trait&lt;_Tp, cv _Up...&gt;::value.</span>
<span id="L2261"><span class="lineNum"> 2261</span> : // For cv std::tuple&lt;_Up&gt;&amp; the result is _Trait&lt;_Tp, cv _Up&amp;...&gt;::value.</span>
<span id="L2262"><span class="lineNum"> 2262</span> : // Otherwise the result is false (because we don't know if std::get throws).</span>
<span id="L2263"><span class="lineNum"> 2263</span> : template&lt;template&lt;typename...&gt; class _Trait, typename _Tp, typename _Tuple&gt;</span>
<span id="L2264"><span class="lineNum"> 2264</span> : inline constexpr bool __unpack_std_tuple = false;</span>
<span id="L2265"><span class="lineNum"> 2265</span> : </span>
<span id="L2266"><span class="lineNum"> 2266</span> : template&lt;template&lt;typename...&gt; class _Trait, typename _Tp, typename... _Up&gt;</span>
<span id="L2267"><span class="lineNum"> 2267</span> : inline constexpr bool __unpack_std_tuple&lt;_Trait, _Tp, tuple&lt;_Up...&gt;&gt;</span>
<span id="L2268"><span class="lineNum"> 2268</span> : = _Trait&lt;_Tp, _Up...&gt;::value;</span>
<span id="L2269"><span class="lineNum"> 2269</span> : </span>
<span id="L2270"><span class="lineNum"> 2270</span> : template&lt;template&lt;typename...&gt; class _Trait, typename _Tp, typename... _Up&gt;</span>
<span id="L2271"><span class="lineNum"> 2271</span> : inline constexpr bool __unpack_std_tuple&lt;_Trait, _Tp, tuple&lt;_Up...&gt;&amp;&gt;</span>
<span id="L2272"><span class="lineNum"> 2272</span> : = _Trait&lt;_Tp, _Up&amp;...&gt;::value;</span>
<span id="L2273"><span class="lineNum"> 2273</span> : </span>
<span id="L2274"><span class="lineNum"> 2274</span> : template&lt;template&lt;typename...&gt; class _Trait, typename _Tp, typename... _Up&gt;</span>
<span id="L2275"><span class="lineNum"> 2275</span> : inline constexpr bool __unpack_std_tuple&lt;_Trait, _Tp, const tuple&lt;_Up...&gt;&gt;</span>
<span id="L2276"><span class="lineNum"> 2276</span> : = _Trait&lt;_Tp, const _Up...&gt;::value;</span>
<span id="L2277"><span class="lineNum"> 2277</span> : </span>
<span id="L2278"><span class="lineNum"> 2278</span> : template&lt;template&lt;typename...&gt; class _Trait, typename _Tp, typename... _Up&gt;</span>
<span id="L2279"><span class="lineNum"> 2279</span> : inline constexpr bool __unpack_std_tuple&lt;_Trait, _Tp, const tuple&lt;_Up...&gt;&amp;&gt;</span>
<span id="L2280"><span class="lineNum"> 2280</span> : = _Trait&lt;_Tp, const _Up&amp;...&gt;::value;</span>
<span id="L2281"><span class="lineNum"> 2281</span> : </span>
<span id="L2282"><span class="lineNum"> 2282</span> : # define __cpp_lib_apply 201603L</span>
<span id="L2283"><span class="lineNum"> 2283</span> : </span>
<span id="L2284"><span class="lineNum"> 2284</span> : template &lt;typename _Fn, typename _Tuple, size_t... _Idx&gt;</span>
<span id="L2285"><span class="lineNum"> 2285</span> : constexpr decltype(auto)</span>
<span id="L2286"><span class="lineNum"> 2286</span> : __apply_impl(_Fn&amp;&amp; __f, _Tuple&amp;&amp; __t, index_sequence&lt;_Idx...&gt;)</span>
<span id="L2287"><span class="lineNum"> 2287</span> : {</span>
<span id="L2288"><span class="lineNum"> 2288</span> : return std::__invoke(std::forward&lt;_Fn&gt;(__f),</span>
<span id="L2289"><span class="lineNum"> 2289</span> : std::get&lt;_Idx&gt;(std::forward&lt;_Tuple&gt;(__t))...);</span>
<span id="L2290"><span class="lineNum"> 2290</span> : }</span>
<span id="L2291"><span class="lineNum"> 2291</span> : </span>
<span id="L2292"><span class="lineNum"> 2292</span> : template &lt;typename _Fn, typename _Tuple&gt;</span>
<span id="L2293"><span class="lineNum"> 2293</span> : constexpr decltype(auto)</span>
<span id="L2294"><span class="lineNum"> 2294</span> : apply(_Fn&amp;&amp; __f, _Tuple&amp;&amp; __t)</span>
<span id="L2295"><span class="lineNum"> 2295</span> : noexcept(__unpack_std_tuple&lt;is_nothrow_invocable, _Fn, _Tuple&gt;)</span>
<span id="L2296"><span class="lineNum"> 2296</span> : {</span>
<span id="L2297"><span class="lineNum"> 2297</span> : using _Indices</span>
<span id="L2298"><span class="lineNum"> 2298</span> : = make_index_sequence&lt;tuple_size_v&lt;remove_reference_t&lt;_Tuple&gt;&gt;&gt;;</span>
<span id="L2299"><span class="lineNum"> 2299</span> : return std::__apply_impl(std::forward&lt;_Fn&gt;(__f),</span>
<span id="L2300"><span class="lineNum"> 2300</span> : std::forward&lt;_Tuple&gt;(__t),</span>
<span id="L2301"><span class="lineNum"> 2301</span> : _Indices{});</span>
<span id="L2302"><span class="lineNum"> 2302</span> : }</span>
<span id="L2303"><span class="lineNum"> 2303</span> : </span>
<span id="L2304"><span class="lineNum"> 2304</span> : #define __cpp_lib_make_from_tuple 201606L</span>
<span id="L2305"><span class="lineNum"> 2305</span> : </span>
<span id="L2306"><span class="lineNum"> 2306</span> : template &lt;typename _Tp, typename _Tuple, size_t... _Idx&gt;</span>
<span id="L2307"><span class="lineNum"> 2307</span> : constexpr _Tp</span>
<span id="L2308"><span class="lineNum"> 2308</span> : __make_from_tuple_impl(_Tuple&amp;&amp; __t, index_sequence&lt;_Idx...&gt;)</span>
<span id="L2309"><span class="lineNum"> 2309</span> : { return _Tp(std::get&lt;_Idx&gt;(std::forward&lt;_Tuple&gt;(__t))...); }</span>
<span id="L2310"><span class="lineNum"> 2310</span> : </span>
<span id="L2311"><span class="lineNum"> 2311</span> : template &lt;typename _Tp, typename _Tuple&gt;</span>
<span id="L2312"><span class="lineNum"> 2312</span> : constexpr _Tp</span>
<span id="L2313"><span class="lineNum"> 2313</span> : make_from_tuple(_Tuple&amp;&amp; __t)</span>
<span id="L2314"><span class="lineNum"> 2314</span> : noexcept(__unpack_std_tuple&lt;is_nothrow_constructible, _Tp, _Tuple&gt;)</span>
<span id="L2315"><span class="lineNum"> 2315</span> : {</span>
<span id="L2316"><span class="lineNum"> 2316</span> : constexpr size_t __n = tuple_size_v&lt;remove_reference_t&lt;_Tuple&gt;&gt;;</span>
<span id="L2317"><span class="lineNum"> 2317</span> : #if __has_builtin(__reference_constructs_from_temporary)</span>
<span id="L2318"><span class="lineNum"> 2318</span> : if constexpr (__n == 1)</span>
<span id="L2319"><span class="lineNum"> 2319</span> : {</span>
<span id="L2320"><span class="lineNum"> 2320</span> : using _Elt = decltype(std::get&lt;0&gt;(std::declval&lt;_Tuple&gt;()));</span>
<span id="L2321"><span class="lineNum"> 2321</span> : static_assert(!__reference_constructs_from_temporary(_Tp, _Elt));</span>
<span id="L2322"><span class="lineNum"> 2322</span> : }</span>
<span id="L2323"><span class="lineNum"> 2323</span> : #endif</span>
<span id="L2324"><span class="lineNum"> 2324</span> : return __make_from_tuple_impl&lt;_Tp&gt;(std::forward&lt;_Tuple&gt;(__t),</span>
<span id="L2325"><span class="lineNum"> 2325</span> : make_index_sequence&lt;__n&gt;{});</span>
<span id="L2326"><span class="lineNum"> 2326</span> : }</span>
<span id="L2327"><span class="lineNum"> 2327</span> : #endif // C++17</span>
<span id="L2328"><span class="lineNum"> 2328</span> : </span>
<span id="L2329"><span class="lineNum"> 2329</span> : #if __cplusplus &gt; 202002L</span>
<span id="L2330"><span class="lineNum"> 2330</span> : template&lt;typename... _TTypes, typename... _UTypes,</span>
<span id="L2331"><span class="lineNum"> 2331</span> : template&lt;typename&gt; class _TQual, template&lt;typename&gt; class _UQual&gt;</span>
<span id="L2332"><span class="lineNum"> 2332</span> : requires requires { typename tuple&lt;common_reference_t&lt;_TQual&lt;_TTypes&gt;, _UQual&lt;_UTypes&gt;&gt;...&gt;; }</span>
<span id="L2333"><span class="lineNum"> 2333</span> : struct basic_common_reference&lt;tuple&lt;_TTypes...&gt;, tuple&lt;_UTypes...&gt;, _TQual, _UQual&gt;</span>
<span id="L2334"><span class="lineNum"> 2334</span> : { using type = tuple&lt;common_reference_t&lt;_TQual&lt;_TTypes&gt;, _UQual&lt;_UTypes&gt;&gt;...&gt;; };</span>
<span id="L2335"><span class="lineNum"> 2335</span> : </span>
<span id="L2336"><span class="lineNum"> 2336</span> : template&lt;typename... _TTypes, typename... _UTypes&gt;</span>
<span id="L2337"><span class="lineNum"> 2337</span> : requires requires { typename tuple&lt;common_type_t&lt;_TTypes, _UTypes&gt;...&gt;; }</span>
<span id="L2338"><span class="lineNum"> 2338</span> : struct common_type&lt;tuple&lt;_TTypes...&gt;, tuple&lt;_UTypes...&gt;&gt;</span>
<span id="L2339"><span class="lineNum"> 2339</span> : { using type = tuple&lt;common_type_t&lt;_TTypes, _UTypes&gt;...&gt;; };</span>
<span id="L2340"><span class="lineNum"> 2340</span> : #endif // C++23</span>
<span id="L2341"><span class="lineNum"> 2341</span> : </span>
<span id="L2342"><span class="lineNum"> 2342</span> : /// @}</span>
<span id="L2343"><span class="lineNum"> 2343</span> : </span>
<span id="L2344"><span class="lineNum"> 2344</span> : _GLIBCXX_END_NAMESPACE_VERSION</span>
<span id="L2345"><span class="lineNum"> 2345</span> : } // namespace std</span>
<span id="L2346"><span class="lineNum"> 2346</span> : </span>
<span id="L2347"><span class="lineNum"> 2347</span> : #endif // C++11</span>
<span id="L2348"><span class="lineNum"> 2348</span> : </span>
<span id="L2349"><span class="lineNum"> 2349</span> : #endif // _GLIBCXX_TUPLE</span>
</pre>
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