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<li class="navelem"><a class="el" href="dir_68267d1309a1af8e8297ef4c3efbcdba.html">src</a></li><li class="navelem"><a class="el" href="dir_66e9674e8206a335795995fa32a03c91.html">entt</a></li><li class="navelem"><a class="el" href="dir_de8f4e6ba3f54a2a21309f742e93a373.html">core</a></li> </ul>
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<div class="headertitle"><div class="title">memory.hpp</div></div>
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<div class="fragment"><div class="line"><a id="l00001" name="l00001"></a><span class="lineno"> 1</span><span class="preprocessor">#ifndef ENTT_CORE_MEMORY_HPP</span></div>
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<div class="line"><a id="l00002" name="l00002"></a><span class="lineno"> 2</span><span class="preprocessor">#define ENTT_CORE_MEMORY_HPP</span></div>
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<div class="line"><a id="l00003" name="l00003"></a><span class="lineno"> 3</span> </div>
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<div class="line"><a id="l00004" name="l00004"></a><span class="lineno"> 4</span><span class="preprocessor">#include <cstddef></span></div>
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<div class="line"><a id="l00005" name="l00005"></a><span class="lineno"> 5</span><span class="preprocessor">#include <limits></span></div>
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<div class="line"><a id="l00006" name="l00006"></a><span class="lineno"> 6</span><span class="preprocessor">#include <memory></span></div>
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<div class="line"><a id="l00007" name="l00007"></a><span class="lineno"> 7</span><span class="preprocessor">#include <tuple></span></div>
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<div class="line"><a id="l00008" name="l00008"></a><span class="lineno"> 8</span><span class="preprocessor">#include <type_traits></span></div>
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<div class="line"><a id="l00009" name="l00009"></a><span class="lineno"> 9</span><span class="preprocessor">#include <utility></span></div>
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<div class="line"><a id="l00010" name="l00010"></a><span class="lineno"> 10</span><span class="preprocessor">#include "../config/config.h"</span></div>
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<div class="line"><a id="l00011" name="l00011"></a><span class="lineno"> 11</span> </div>
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<div class="line"><a id="l00012" name="l00012"></a><span class="lineno"> 12</span><span class="keyword">namespace </span><a class="code hl_namespace" href="namespaceentt.html">entt</a> {</div>
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<div class="line"><a id="l00013" name="l00013"></a><span class="lineno"> 13</span> </div>
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<div class="line"><a id="l00019" name="l00019"></a><span class="lineno"><a class="line" href="namespaceentt.html#a62ae1b5fdbd6563ea136dcd40ed714ad"> 19</a></span>[[nodiscard]] <span class="keyword">inline</span> <span class="keyword">constexpr</span> <span class="keywordtype">bool</span> <a class="code hl_function" href="namespaceentt.html#a62ae1b5fdbd6563ea136dcd40ed714ad">is_power_of_two</a>(<span class="keyword">const</span> std::size_t value) <span class="keyword">noexcept</span> {</div>
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<div class="line"><a id="l00020" name="l00020"></a><span class="lineno"> 20</span> <span class="keywordflow">return</span> value && ((value & (value - 1)) == 0);</div>
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<div class="line"><a id="l00021" name="l00021"></a><span class="lineno"> 21</span>}</div>
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<div class="line"><a id="l00022" name="l00022"></a><span class="lineno"> 22</span> </div>
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<div class="line"><a id="l00028" name="l00028"></a><span class="lineno"><a class="line" href="namespaceentt.html#ac0b95d19a5709187e6906a5a9c407b55"> 28</a></span>[[nodiscard]] <span class="keyword">inline</span> <span class="keyword">constexpr</span> std::size_t <a class="code hl_function" href="namespaceentt.html#ac0b95d19a5709187e6906a5a9c407b55">next_power_of_two</a>(<span class="keyword">const</span> std::size_t value) <span class="keyword">noexcept</span> {</div>
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<div class="line"><a id="l00029" name="l00029"></a><span class="lineno"> 29</span> ENTT_ASSERT_CONSTEXPR(value < (std::size_t{1u} << (std::numeric_limits<std::size_t>::digits - 1)), <span class="stringliteral">"Numeric limits exceeded"</span>);</div>
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<div class="line"><a id="l00030" name="l00030"></a><span class="lineno"> 30</span> std::size_t curr = value - (value != 0u);</div>
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<div class="line"><a id="l00031" name="l00031"></a><span class="lineno"> 31</span> </div>
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<div class="line"><a id="l00032" name="l00032"></a><span class="lineno"> 32</span> <span class="keywordflow">for</span>(<span class="keywordtype">int</span> next = 1; next < std::numeric_limits<std::size_t>::digits; next = next * 2) {</div>
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<div class="line"><a id="l00033" name="l00033"></a><span class="lineno"> 33</span> curr |= curr >> next;</div>
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<div class="line"><a id="l00034" name="l00034"></a><span class="lineno"> 34</span> }</div>
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<div class="line"><a id="l00035" name="l00035"></a><span class="lineno"> 35</span> </div>
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<div class="line"><a id="l00036" name="l00036"></a><span class="lineno"> 36</span> <span class="keywordflow">return</span> ++curr;</div>
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<div class="line"><a id="l00037" name="l00037"></a><span class="lineno"> 37</span>}</div>
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<div class="line"><a id="l00038" name="l00038"></a><span class="lineno"> 38</span> </div>
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<div class="line"><a id="l00045" name="l00045"></a><span class="lineno"><a class="line" href="namespaceentt.html#a8bc8848a1cfd5f84991f3932894a20fc"> 45</a></span>[[nodiscard]] <span class="keyword">inline</span> <span class="keyword">constexpr</span> std::size_t <a class="code hl_function" href="namespaceentt.html#a8bc8848a1cfd5f84991f3932894a20fc">fast_mod</a>(<span class="keyword">const</span> std::size_t value, <span class="keyword">const</span> std::size_t mod) <span class="keyword">noexcept</span> {</div>
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<div class="line"><a id="l00046" name="l00046"></a><span class="lineno"> 46</span> ENTT_ASSERT_CONSTEXPR(<a class="code hl_function" href="namespaceentt.html#a62ae1b5fdbd6563ea136dcd40ed714ad">is_power_of_two</a>(mod), <span class="stringliteral">"Value must be a power of two"</span>);</div>
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<div class="line"><a id="l00047" name="l00047"></a><span class="lineno"> 47</span> <span class="keywordflow">return</span> value & (mod - 1u);</div>
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<div class="line"><a id="l00048" name="l00048"></a><span class="lineno"> 48</span>}</div>
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<div class="line"><a id="l00049" name="l00049"></a><span class="lineno"> 49</span> </div>
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<div class="line"><a id="l00056" name="l00056"></a><span class="lineno"> 56</span><span class="keyword">template</span><<span class="keyword">typename</span> Type></div>
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<div class="line"><a id="l00057" name="l00057"></a><span class="lineno"><a class="line" href="namespaceentt.html#af0ecb90b45a53e3272d761c237a0d850"> 57</a></span>[[nodiscard]] <span class="keyword">constexpr</span> <span class="keyword">auto</span> <a class="code hl_function" href="namespaceentt.html#af0ecb90b45a53e3272d761c237a0d850">to_address</a>(Type &&ptr) <span class="keyword">noexcept</span> {</div>
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<div class="line"><a id="l00058" name="l00058"></a><span class="lineno"> 58</span> <span class="keywordflow">if</span> <span class="keyword">constexpr</span>(std::is_pointer_v<std::decay_t<Type>>) {</div>
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<div class="line"><a id="l00059" name="l00059"></a><span class="lineno"> 59</span> <span class="keywordflow">return</span> ptr;</div>
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<div class="line"><a id="l00060" name="l00060"></a><span class="lineno"> 60</span> } <span class="keywordflow">else</span> {</div>
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<div class="line"><a id="l00061" name="l00061"></a><span class="lineno"> 61</span> <span class="keywordflow">return</span> <a class="code hl_function" href="namespaceentt.html#af0ecb90b45a53e3272d761c237a0d850">to_address</a>(std::forward<Type>(ptr).operator->());</div>
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<div class="line"><a id="l00062" name="l00062"></a><span class="lineno"> 62</span> }</div>
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<div class="line"><a id="l00063" name="l00063"></a><span class="lineno"> 63</span>}</div>
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<div class="line"><a id="l00064" name="l00064"></a><span class="lineno"> 64</span> </div>
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<div class="line"><a id="l00071" name="l00071"></a><span class="lineno"> 71</span><span class="keyword">template</span><<span class="keyword">typename</span> Allocator></div>
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<div class="line"><a id="l00072" name="l00072"></a><span class="lineno"><a class="line" href="namespaceentt.html#ae934980252d1f2ce8f2473c8d74347df"> 72</a></span><span class="keyword">constexpr</span> <span class="keywordtype">void</span> <a class="code hl_function" href="namespaceentt.html#ae934980252d1f2ce8f2473c8d74347df">propagate_on_container_copy_assignment</a>([[maybe_unused]] Allocator &lhs, [[maybe_unused]] Allocator &rhs) <span class="keyword">noexcept</span> {</div>
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<div class="line"><a id="l00073" name="l00073"></a><span class="lineno"> 73</span> <span class="keywordflow">if</span> <span class="keyword">constexpr</span>(std::allocator_traits<Allocator>::propagate_on_container_copy_assignment::value) {</div>
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<div class="line"><a id="l00074" name="l00074"></a><span class="lineno"> 74</span> lhs = rhs;</div>
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<div class="line"><a id="l00075" name="l00075"></a><span class="lineno"> 75</span> }</div>
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<div class="line"><a id="l00076" name="l00076"></a><span class="lineno"> 76</span>}</div>
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<div class="line"><a id="l00077" name="l00077"></a><span class="lineno"> 77</span> </div>
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<div class="line"><a id="l00084" name="l00084"></a><span class="lineno"> 84</span><span class="keyword">template</span><<span class="keyword">typename</span> Allocator></div>
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<div class="line"><a id="l00085" name="l00085"></a><span class="lineno"><a class="line" href="namespaceentt.html#a46cd263b358a2d495d4f4ee27d4537d7"> 85</a></span><span class="keyword">constexpr</span> <span class="keywordtype">void</span> <a class="code hl_function" href="namespaceentt.html#a46cd263b358a2d495d4f4ee27d4537d7">propagate_on_container_move_assignment</a>([[maybe_unused]] Allocator &lhs, [[maybe_unused]] Allocator &rhs) <span class="keyword">noexcept</span> {</div>
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<div class="line"><a id="l00086" name="l00086"></a><span class="lineno"> 86</span> <span class="keywordflow">if</span> <span class="keyword">constexpr</span>(std::allocator_traits<Allocator>::propagate_on_container_move_assignment::value) {</div>
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<div class="line"><a id="l00087" name="l00087"></a><span class="lineno"> 87</span> lhs = std::move(rhs);</div>
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<div class="line"><a id="l00088" name="l00088"></a><span class="lineno"> 88</span> }</div>
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<div class="line"><a id="l00089" name="l00089"></a><span class="lineno"> 89</span>}</div>
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<div class="line"><a id="l00090" name="l00090"></a><span class="lineno"> 90</span> </div>
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<div class="line"><a id="l00097" name="l00097"></a><span class="lineno"> 97</span><span class="keyword">template</span><<span class="keyword">typename</span> Allocator></div>
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<div class="line"><a id="l00098" name="l00098"></a><span class="lineno"><a class="line" href="namespaceentt.html#a0dd7ed3d3f11933cd542d8f4646cd695"> 98</a></span><span class="keyword">constexpr</span> <span class="keywordtype">void</span> <a class="code hl_function" href="namespaceentt.html#a0dd7ed3d3f11933cd542d8f4646cd695">propagate_on_container_swap</a>([[maybe_unused]] Allocator &lhs, [[maybe_unused]] Allocator &rhs) <span class="keyword">noexcept</span> {</div>
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<div class="line"><a id="l00099" name="l00099"></a><span class="lineno"> 99</span> <span class="keywordflow">if</span> <span class="keyword">constexpr</span>(std::allocator_traits<Allocator>::propagate_on_container_swap::value) {</div>
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<div class="line"><a id="l00100" name="l00100"></a><span class="lineno"> 100</span> <span class="keyword">using </span>std::swap;</div>
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<div class="line"><a id="l00101" name="l00101"></a><span class="lineno"> 101</span> <a class="code hl_function" href="namespaceentt.html#a85aff290a542f0f053b993b507410b21">swap</a>(lhs, rhs);</div>
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<div class="line"><a id="l00102" name="l00102"></a><span class="lineno"> 102</span> } <span class="keywordflow">else</span> {</div>
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<div class="line"><a id="l00103" name="l00103"></a><span class="lineno"> 103</span> ENTT_ASSERT_CONSTEXPR(lhs == rhs, <span class="stringliteral">"Cannot swap the containers"</span>);</div>
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<div class="line"><a id="l00104" name="l00104"></a><span class="lineno"> 104</span> }</div>
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<div class="line"><a id="l00105" name="l00105"></a><span class="lineno"> 105</span>}</div>
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<div class="line"><a id="l00106" name="l00106"></a><span class="lineno"> 106</span> </div>
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<div class="line"><a id="l00111" name="l00111"></a><span class="lineno"> 111</span><span class="keyword">template</span><<span class="keyword">typename</span> Allocator></div>
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<div class="line"><a id="l00112" name="l00112"></a><span class="lineno"><a class="line" href="structentt_1_1allocation__deleter.html"> 112</a></span><span class="keyword">struct </span><a class="code hl_struct" href="structentt_1_1allocation__deleter.html">allocation_deleter</a>: <span class="keyword">private</span> Allocator {</div>
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<div class="line"><a id="l00114" name="l00114"></a><span class="lineno"><a class="line" href="structentt_1_1allocation__deleter.html#abce9d9de78a31b79e98745f4e029c863"> 114</a></span> <span class="keyword">using </span><a class="code hl_typedef" href="structentt_1_1allocation__deleter.html#abce9d9de78a31b79e98745f4e029c863">allocator_type</a> = Allocator;</div>
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<div class="line"><a id="l00116" name="l00116"></a><span class="lineno"><a class="line" href="structentt_1_1allocation__deleter.html#a37186f63eb16409b00b0261041b68c5c"> 116</a></span> <span class="keyword">using </span><a class="code hl_typedef" href="structentt_1_1allocation__deleter.html#a37186f63eb16409b00b0261041b68c5c">pointer</a> = <span class="keyword">typename</span> std::allocator_traits<Allocator>::pointer;</div>
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<div class="line"><a id="l00117" name="l00117"></a><span class="lineno"> 117</span> </div>
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<div class="line"><a id="l00122" name="l00122"></a><span class="lineno"><a class="line" href="structentt_1_1allocation__deleter.html#a5adbf1ba5d47a86d0b67d2c565fed220"> 122</a></span> <span class="keyword">constexpr</span> <a class="code hl_function" href="structentt_1_1allocation__deleter.html#a5adbf1ba5d47a86d0b67d2c565fed220">allocation_deleter</a>(<span class="keyword">const</span> <a class="code hl_typedef" href="structentt_1_1allocation__deleter.html#abce9d9de78a31b79e98745f4e029c863">allocator_type</a> &alloc) <span class="keyword">noexcept</span>(std::is_nothrow_copy_constructible_v<allocator_type>)</div>
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<div class="line"><a id="l00123" name="l00123"></a><span class="lineno"> 123</span> : Allocator{alloc} {}</div>
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<div class="line"><a id="l00124" name="l00124"></a><span class="lineno"> 124</span> </div>
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<div class="line"><a id="l00129" name="l00129"></a><span class="lineno"><a class="line" href="structentt_1_1allocation__deleter.html#aaeea55e9539671ec5d6b1660f25e57d3"> 129</a></span> <span class="keyword">constexpr</span> <span class="keywordtype">void</span> <a class="code hl_function" href="structentt_1_1allocation__deleter.html#aaeea55e9539671ec5d6b1660f25e57d3">operator()</a>(<a class="code hl_typedef" href="structentt_1_1allocation__deleter.html#a37186f63eb16409b00b0261041b68c5c">pointer</a> ptr) <span class="keyword">noexcept</span>(std::is_nothrow_destructible_v<typename allocator_type::value_type>) {</div>
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<div class="line"><a id="l00130" name="l00130"></a><span class="lineno"> 130</span> <span class="keyword">using </span>alloc_traits = std::allocator_traits<Allocator>;</div>
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<div class="line"><a id="l00131" name="l00131"></a><span class="lineno"> 131</span> alloc_traits::destroy(*<span class="keyword">this</span>, <a class="code hl_function" href="namespaceentt.html#af0ecb90b45a53e3272d761c237a0d850">to_address</a>(ptr));</div>
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<div class="line"><a id="l00132" name="l00132"></a><span class="lineno"> 132</span> alloc_traits::deallocate(*<span class="keyword">this</span>, ptr, 1u);</div>
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<div class="line"><a id="l00133" name="l00133"></a><span class="lineno"> 133</span> }</div>
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<div class="line"><a id="l00134" name="l00134"></a><span class="lineno"> 134</span>};</div>
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<div class="line"><a id="l00135" name="l00135"></a><span class="lineno"> 135</span> </div>
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<div class="line"><a id="l00145" name="l00145"></a><span class="lineno"> 145</span><span class="keyword">template</span><<span class="keyword">typename</span> Type, <span class="keyword">typename</span> Allocator, <span class="keyword">typename</span>... Args></div>
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<div class="line"><a id="l00146" name="l00146"></a><span class="lineno"><a class="line" href="namespaceentt.html#ae3729f1b7699d013f982b2de2ec781f9"> 146</a></span>ENTT_CONSTEXPR <span class="keyword">auto</span> <a class="code hl_function" href="namespaceentt.html#ae3729f1b7699d013f982b2de2ec781f9">allocate_unique</a>(Allocator &allocator, Args &&...args) {</div>
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<div class="line"><a id="l00147" name="l00147"></a><span class="lineno"> 147</span> <span class="keyword">static_assert</span>(!std::is_array_v<Type>, <span class="stringliteral">"Array types are not supported"</span>);</div>
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<div class="line"><a id="l00148" name="l00148"></a><span class="lineno"> 148</span> </div>
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<div class="line"><a id="l00149" name="l00149"></a><span class="lineno"> 149</span> <span class="keyword">using </span>alloc_traits = <span class="keyword">typename</span> std::allocator_traits<Allocator>::template rebind_traits<Type>;</div>
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<div class="line"><a id="l00150" name="l00150"></a><span class="lineno"> 150</span> <span class="keyword">using </span>allocator_type = <span class="keyword">typename</span> alloc_traits::allocator_type;</div>
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<div class="line"><a id="l00151" name="l00151"></a><span class="lineno"> 151</span> </div>
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<div class="line"><a id="l00152" name="l00152"></a><span class="lineno"> 152</span> allocator_type alloc{allocator};</div>
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<div class="line"><a id="l00153" name="l00153"></a><span class="lineno"> 153</span> <span class="keyword">auto</span> ptr = alloc_traits::allocate(alloc, 1u);</div>
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<div class="line"><a id="l00154" name="l00154"></a><span class="lineno"> 154</span> </div>
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<div class="line"><a id="l00155" name="l00155"></a><span class="lineno"> 155</span> ENTT_TRY {</div>
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<div class="line"><a id="l00156" name="l00156"></a><span class="lineno"> 156</span> alloc_traits::construct(alloc, <a class="code hl_function" href="namespaceentt.html#af0ecb90b45a53e3272d761c237a0d850">to_address</a>(ptr), std::forward<Args>(args)...);</div>
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<div class="line"><a id="l00157" name="l00157"></a><span class="lineno"> 157</span> }</div>
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<div class="line"><a id="l00158" name="l00158"></a><span class="lineno"> 158</span> ENTT_CATCH {</div>
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<div class="line"><a id="l00159" name="l00159"></a><span class="lineno"> 159</span> alloc_traits::deallocate(alloc, ptr, 1u);</div>
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<div class="line"><a id="l00160" name="l00160"></a><span class="lineno"> 160</span> ENTT_THROW;</div>
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<div class="line"><a id="l00161" name="l00161"></a><span class="lineno"> 161</span> }</div>
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<div class="line"><a id="l00162" name="l00162"></a><span class="lineno"> 162</span> </div>
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<div class="line"><a id="l00163" name="l00163"></a><span class="lineno"> 163</span> <span class="keywordflow">return</span> std::unique_ptr<Type, allocation_deleter<allocator_type>>{ptr, alloc};</div>
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<div class="line"><a id="l00164" name="l00164"></a><span class="lineno"> 164</span>}</div>
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<div class="line"><a id="l00165" name="l00165"></a><span class="lineno"> 165</span> </div>
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<div class="line"><a id="l00171" name="l00171"></a><span class="lineno"> 171</span><span class="keyword">namespace </span>internal {</div>
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<div class="line"><a id="l00172" name="l00172"></a><span class="lineno"> 172</span> </div>
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<div class="line"><a id="l00173" name="l00173"></a><span class="lineno"> 173</span><span class="keyword">template</span><<span class="keyword">typename</span> Type></div>
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<div class="line"><a id="l00174" name="l00174"></a><span class="lineno"> 174</span><span class="keyword">struct </span>uses_allocator_construction {</div>
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<div class="line"><a id="l00175" name="l00175"></a><span class="lineno"> 175</span> <span class="keyword">template</span><<span class="keyword">typename</span> Allocator, <span class="keyword">typename</span>... Params></div>
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<div class="line"><a id="l00176" name="l00176"></a><span class="lineno"> 176</span> <span class="keyword">static</span> <span class="keyword">constexpr</span> <span class="keyword">auto</span> args([[maybe_unused]] <span class="keyword">const</span> Allocator &allocator, Params &&...params) <span class="keyword">noexcept</span> {</div>
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<div class="line"><a id="l00177" name="l00177"></a><span class="lineno"> 177</span> <span class="keywordflow">if</span> <span class="keyword">constexpr</span>(!std::uses_allocator_v<Type, Allocator> && std::is_constructible_v<Type, Params...>) {</div>
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<div class="line"><a id="l00178" name="l00178"></a><span class="lineno"> 178</span> <span class="keywordflow">return</span> std::forward_as_tuple(std::forward<Params>(params)...);</div>
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<div class="line"><a id="l00179" name="l00179"></a><span class="lineno"> 179</span> } <span class="keywordflow">else</span> {</div>
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<div class="line"><a id="l00180" name="l00180"></a><span class="lineno"> 180</span> <span class="keyword">static_assert</span>(std::uses_allocator_v<Type, Allocator>, <span class="stringliteral">"Ill-formed request"</span>);</div>
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<div class="line"><a id="l00181" name="l00181"></a><span class="lineno"> 181</span> </div>
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<div class="line"><a id="l00182" name="l00182"></a><span class="lineno"> 182</span> <span class="keywordflow">if</span> <span class="keyword">constexpr</span>(std::is_constructible_v<Type, std::allocator_arg_t, <span class="keyword">const</span> Allocator &, Params...>) {</div>
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<div class="line"><a id="l00183" name="l00183"></a><span class="lineno"> 183</span> <span class="keywordflow">return</span> std::tuple<std::allocator_arg_t, <span class="keyword">const</span> Allocator &, Params &&...>{std::allocator_arg, allocator, std::forward<Params>(params)...};</div>
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<div class="line"><a id="l00184" name="l00184"></a><span class="lineno"> 184</span> } <span class="keywordflow">else</span> {</div>
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<div class="line"><a id="l00185" name="l00185"></a><span class="lineno"> 185</span> <span class="keyword">static_assert</span>(std::is_constructible_v<Type, Params..., <span class="keyword">const</span> Allocator &>, <span class="stringliteral">"Ill-formed request"</span>);</div>
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<div class="line"><a id="l00186" name="l00186"></a><span class="lineno"> 186</span> <span class="keywordflow">return</span> std::forward_as_tuple(std::forward<Params>(params)..., allocator);</div>
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<div class="line"><a id="l00187" name="l00187"></a><span class="lineno"> 187</span> }</div>
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<div class="line"><a id="l00188" name="l00188"></a><span class="lineno"> 188</span> }</div>
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<div class="line"><a id="l00189" name="l00189"></a><span class="lineno"> 189</span> }</div>
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<div class="line"><a id="l00190" name="l00190"></a><span class="lineno"> 190</span>};</div>
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<div class="line"><a id="l00191" name="l00191"></a><span class="lineno"> 191</span> </div>
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<div class="line"><a id="l00192" name="l00192"></a><span class="lineno"> 192</span><span class="keyword">template</span><<span class="keyword">typename</span> Type, <span class="keyword">typename</span> Other></div>
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<div class="line"><a id="l00193" name="l00193"></a><span class="lineno"> 193</span><span class="keyword">struct </span>uses_allocator_construction<std::pair<Type, Other>> {</div>
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<div class="line"><a id="l00194" name="l00194"></a><span class="lineno"> 194</span> <span class="keyword">using </span>type = std::pair<Type, Other>;</div>
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<div class="line"><a id="l00195" name="l00195"></a><span class="lineno"> 195</span> </div>
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<div class="line"><a id="l00196" name="l00196"></a><span class="lineno"> 196</span> <span class="keyword">template</span><<span class="keyword">typename</span> Allocator, <span class="keyword">typename</span> First, <span class="keyword">typename</span> Second></div>
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<div class="line"><a id="l00197" name="l00197"></a><span class="lineno"> 197</span> <span class="keyword">static</span> <span class="keyword">constexpr</span> <span class="keyword">auto</span> args(<span class="keyword">const</span> Allocator &allocator, std::piecewise_construct_t, First &&first, Second &&second) <span class="keyword">noexcept</span> {</div>
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<div class="line"><a id="l00198" name="l00198"></a><span class="lineno"> 198</span> <span class="keywordflow">return</span> std::make_tuple(</div>
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<div class="line"><a id="l00199" name="l00199"></a><span class="lineno"> 199</span> std::piecewise_construct,</div>
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<div class="line"><a id="l00200" name="l00200"></a><span class="lineno"> 200</span> std::apply([&allocator](<span class="keyword">auto</span> &&...curr) { <span class="keywordflow">return</span> uses_allocator_construction<Type>::args(allocator, std::forward<<span class="keyword">decltype</span>(curr)>(curr)...); }, std::forward<First>(first)),</div>
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<div class="line"><a id="l00201" name="l00201"></a><span class="lineno"> 201</span> std::apply([&allocator](<span class="keyword">auto</span> &&...curr) { <span class="keywordflow">return</span> uses_allocator_construction<Other>::args(allocator, std::forward<<span class="keyword">decltype</span>(curr)>(curr)...); }, std::forward<Second>(second)));</div>
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<div class="line"><a id="l00202" name="l00202"></a><span class="lineno"> 202</span> }</div>
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<div class="line"><a id="l00203" name="l00203"></a><span class="lineno"> 203</span> </div>
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<div class="line"><a id="l00204" name="l00204"></a><span class="lineno"> 204</span> <span class="keyword">template</span><<span class="keyword">typename</span> Allocator></div>
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<div class="line"><a id="l00205" name="l00205"></a><span class="lineno"> 205</span> <span class="keyword">static</span> <span class="keyword">constexpr</span> <span class="keyword">auto</span> args(<span class="keyword">const</span> Allocator &allocator) <span class="keyword">noexcept</span> {</div>
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<div class="line"><a id="l00206" name="l00206"></a><span class="lineno"> 206</span> <span class="keywordflow">return</span> uses_allocator_construction<type>::args(allocator, std::piecewise_construct, std::tuple<>{}, std::tuple<>{});</div>
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<div class="line"><a id="l00207" name="l00207"></a><span class="lineno"> 207</span> }</div>
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<div class="line"><a id="l00208" name="l00208"></a><span class="lineno"> 208</span> </div>
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<div class="line"><a id="l00209" name="l00209"></a><span class="lineno"> 209</span> <span class="keyword">template</span><<span class="keyword">typename</span> Allocator, <span class="keyword">typename</span> First, <span class="keyword">typename</span> Second></div>
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<div class="line"><a id="l00210" name="l00210"></a><span class="lineno"> 210</span> <span class="keyword">static</span> <span class="keyword">constexpr</span> <span class="keyword">auto</span> args(<span class="keyword">const</span> Allocator &allocator, First &&first, Second &&second) <span class="keyword">noexcept</span> {</div>
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<div class="line"><a id="l00211" name="l00211"></a><span class="lineno"> 211</span> <span class="keywordflow">return</span> uses_allocator_construction<type>::args(allocator, std::piecewise_construct, std::forward_as_tuple(std::forward<First>(first)), std::forward_as_tuple(std::forward<Second>(second)));</div>
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<div class="line"><a id="l00212" name="l00212"></a><span class="lineno"> 212</span> }</div>
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<div class="line"><a id="l00213" name="l00213"></a><span class="lineno"> 213</span> </div>
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<div class="line"><a id="l00214" name="l00214"></a><span class="lineno"> 214</span> <span class="keyword">template</span><<span class="keyword">typename</span> Allocator, <span class="keyword">typename</span> First, <span class="keyword">typename</span> Second></div>
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<div class="line"><a id="l00215" name="l00215"></a><span class="lineno"> 215</span> <span class="keyword">static</span> <span class="keyword">constexpr</span> <span class="keyword">auto</span> args(<span class="keyword">const</span> Allocator &allocator, <span class="keyword">const</span> std::pair<First, Second> &value) <span class="keyword">noexcept</span> {</div>
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<div class="line"><a id="l00216" name="l00216"></a><span class="lineno"> 216</span> <span class="keywordflow">return</span> uses_allocator_construction<type>::args(allocator, std::piecewise_construct, std::forward_as_tuple(value.first), std::forward_as_tuple(value.second));</div>
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<div class="line"><a id="l00217" name="l00217"></a><span class="lineno"> 217</span> }</div>
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<div class="line"><a id="l00218" name="l00218"></a><span class="lineno"> 218</span> </div>
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<div class="line"><a id="l00219" name="l00219"></a><span class="lineno"> 219</span> <span class="keyword">template</span><<span class="keyword">typename</span> Allocator, <span class="keyword">typename</span> First, <span class="keyword">typename</span> Second></div>
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<div class="line"><a id="l00220" name="l00220"></a><span class="lineno"> 220</span> <span class="keyword">static</span> <span class="keyword">constexpr</span> <span class="keyword">auto</span> args(<span class="keyword">const</span> Allocator &allocator, std::pair<First, Second> &&value) <span class="keyword">noexcept</span> {</div>
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<div class="line"><a id="l00221" name="l00221"></a><span class="lineno"> 221</span> <span class="keywordflow">return</span> uses_allocator_construction<type>::args(allocator, std::piecewise_construct, std::forward_as_tuple(std::move(value.first)), std::forward_as_tuple(std::move(value.second)));</div>
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<div class="line"><a id="l00222" name="l00222"></a><span class="lineno"> 222</span> }</div>
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<div class="line"><a id="l00223" name="l00223"></a><span class="lineno"> 223</span>};</div>
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<div class="line"><a id="l00224" name="l00224"></a><span class="lineno"> 224</span> </div>
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<div class="line"><a id="l00225" name="l00225"></a><span class="lineno"> 225</span>} <span class="comment">// namespace internal</span></div>
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<div class="line"><a id="l00226" name="l00226"></a><span class="lineno"> 226</span> </div>
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<div class="line"><a id="l00245" name="l00245"></a><span class="lineno"> 245</span><span class="keyword">template</span><<span class="keyword">typename</span> Type, <span class="keyword">typename</span> Allocator, <span class="keyword">typename</span>... Args></div>
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<div class="line"><a id="l00246" name="l00246"></a><span class="lineno"><a class="line" href="namespaceentt.html#ac447ddab9d528647a79fd9aca429faed"> 246</a></span><span class="keyword">constexpr</span> <span class="keyword">auto</span> <a class="code hl_function" href="namespaceentt.html#ac447ddab9d528647a79fd9aca429faed">uses_allocator_construction_args</a>(<span class="keyword">const</span> Allocator &allocator, Args &&...args) <span class="keyword">noexcept</span> {</div>
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<div class="line"><a id="l00247" name="l00247"></a><span class="lineno"> 247</span> <span class="keywordflow">return</span> internal::uses_allocator_construction<Type>::args(allocator, std::forward<Args>(args)...);</div>
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<div class="line"><a id="l00248" name="l00248"></a><span class="lineno"> 248</span>}</div>
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<div class="line"><a id="l00249" name="l00249"></a><span class="lineno"> 249</span> </div>
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<div class="line"><a id="l00263" name="l00263"></a><span class="lineno"> 263</span><span class="keyword">template</span><<span class="keyword">typename</span> Type, <span class="keyword">typename</span> Allocator, <span class="keyword">typename</span>... Args></div>
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<div class="line"><a id="l00264" name="l00264"></a><span class="lineno"><a class="line" href="namespaceentt.html#a12e4d0c58f9c4cc6f5513c39c530b9b7"> 264</a></span><span class="keyword">constexpr</span> Type <a class="code hl_function" href="namespaceentt.html#a12e4d0c58f9c4cc6f5513c39c530b9b7">make_obj_using_allocator</a>(<span class="keyword">const</span> Allocator &allocator, Args &&...args) {</div>
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<div class="line"><a id="l00265" name="l00265"></a><span class="lineno"> 265</span> <span class="keywordflow">return</span> std::make_from_tuple<Type>(internal::uses_allocator_construction<Type>::args(allocator, std::forward<Args>(args)...));</div>
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<div class="line"><a id="l00266" name="l00266"></a><span class="lineno"> 266</span>}</div>
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<div class="line"><a id="l00267" name="l00267"></a><span class="lineno"> 267</span> </div>
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<div class="line"><a id="l00282" name="l00282"></a><span class="lineno"> 282</span><span class="keyword">template</span><<span class="keyword">typename</span> Type, <span class="keyword">typename</span> Allocator, <span class="keyword">typename</span>... Args></div>
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<div class="line"><a id="l00283" name="l00283"></a><span class="lineno"><a class="line" href="namespaceentt.html#a81f946567d220e7c8814636333d0cbe0"> 283</a></span><span class="keyword">constexpr</span> Type *<a class="code hl_function" href="namespaceentt.html#a81f946567d220e7c8814636333d0cbe0">uninitialized_construct_using_allocator</a>(Type *value, <span class="keyword">const</span> Allocator &allocator, Args &&...args) {</div>
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<div class="line"><a id="l00284" name="l00284"></a><span class="lineno"> 284</span> <span class="keywordflow">return</span> std::apply([value](<span class="keyword">auto</span> &&...curr) { <span class="keywordflow">return</span> <span class="keyword">new</span>(value) Type(std::forward<<span class="keyword">decltype</span>(curr)>(curr)...); }, internal::uses_allocator_construction<Type>::args(allocator, std::forward<Args>(args)...));</div>
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<div class="line"><a id="l00285" name="l00285"></a><span class="lineno"> 285</span>}</div>
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<div class="line"><a id="l00286" name="l00286"></a><span class="lineno"> 286</span> </div>
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<div class="line"><a id="l00287" name="l00287"></a><span class="lineno"> 287</span>} <span class="comment">// namespace entt</span></div>
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<div class="line"><a id="l00288" name="l00288"></a><span class="lineno"> 288</span> </div>
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<div class="line"><a id="l00289" name="l00289"></a><span class="lineno"> 289</span><span class="preprocessor">#endif</span></div>
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<div class="ttc" id="anamespaceentt_html"><div class="ttname"><a href="namespaceentt.html">entt</a></div><div class="ttdoc">EnTT default namespace.</div><div class="ttdef"><b>Definition:</b> <a href="dense__map_8hpp_source.html#l00021">dense_map.hpp:21</a></div></div>
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<div class="ttc" id="anamespaceentt_html_a0dd7ed3d3f11933cd542d8f4646cd695"><div class="ttname"><a href="namespaceentt.html#a0dd7ed3d3f11933cd542d8f4646cd695">entt::propagate_on_container_swap</a></div><div class="ttdeci">constexpr void propagate_on_container_swap(Allocator &lhs, Allocator &rhs) noexcept</div><div class="ttdoc">Utility function to design allocation-aware containers.</div><div class="ttdef"><b>Definition:</b> <a href="memory_8hpp_source.html#l00098">memory.hpp:98</a></div></div>
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<div class="ttc" id="anamespaceentt_html_a12e4d0c58f9c4cc6f5513c39c530b9b7"><div class="ttname"><a href="namespaceentt.html#a12e4d0c58f9c4cc6f5513c39c530b9b7">entt::make_obj_using_allocator</a></div><div class="ttdeci">constexpr Type make_obj_using_allocator(const Allocator &allocator, Args &&...args)</div><div class="ttdoc">Uses-allocator construction utility (waiting for C++20).</div><div class="ttdef"><b>Definition:</b> <a href="memory_8hpp_source.html#l00264">memory.hpp:264</a></div></div>
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<div class="ttc" id="anamespaceentt_html_a46cd263b358a2d495d4f4ee27d4537d7"><div class="ttname"><a href="namespaceentt.html#a46cd263b358a2d495d4f4ee27d4537d7">entt::propagate_on_container_move_assignment</a></div><div class="ttdeci">constexpr void propagate_on_container_move_assignment(Allocator &lhs, Allocator &rhs) noexcept</div><div class="ttdoc">Utility function to design allocation-aware containers.</div><div class="ttdef"><b>Definition:</b> <a href="memory_8hpp_source.html#l00085">memory.hpp:85</a></div></div>
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<div class="ttc" id="anamespaceentt_html_a62ae1b5fdbd6563ea136dcd40ed714ad"><div class="ttname"><a href="namespaceentt.html#a62ae1b5fdbd6563ea136dcd40ed714ad">entt::is_power_of_two</a></div><div class="ttdeci">constexpr bool is_power_of_two(const std::size_t value) noexcept</div><div class="ttdoc">Checks whether a value is a power of two or not.</div><div class="ttdef"><b>Definition:</b> <a href="memory_8hpp_source.html#l00019">memory.hpp:19</a></div></div>
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<div class="ttc" id="anamespaceentt_html_a81f946567d220e7c8814636333d0cbe0"><div class="ttname"><a href="namespaceentt.html#a81f946567d220e7c8814636333d0cbe0">entt::uninitialized_construct_using_allocator</a></div><div class="ttdeci">constexpr Type * uninitialized_construct_using_allocator(Type *value, const Allocator &allocator, Args &&...args)</div><div class="ttdoc">Uses-allocator construction utility (waiting for C++20).</div><div class="ttdef"><b>Definition:</b> <a href="memory_8hpp_source.html#l00283">memory.hpp:283</a></div></div>
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<div class="ttc" id="anamespaceentt_html_a85aff290a542f0f053b993b507410b21"><div class="ttname"><a href="namespaceentt.html#a85aff290a542f0f053b993b507410b21">entt::swap</a></div><div class="ttdeci">constexpr void swap(compressed_pair< First, Second > &lhs, compressed_pair< First, Second > &rhs)</div><div class="ttdoc">Swaps two compressed pair objects.</div><div class="ttdef"><b>Definition:</b> <a href="compressed__pair_8hpp_source.html#l00247">compressed_pair.hpp:247</a></div></div>
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<div class="ttc" id="anamespaceentt_html_a8bc8848a1cfd5f84991f3932894a20fc"><div class="ttname"><a href="namespaceentt.html#a8bc8848a1cfd5f84991f3932894a20fc">entt::fast_mod</a></div><div class="ttdeci">constexpr std::size_t fast_mod(const std::size_t value, const std::size_t mod) noexcept</div><div class="ttdoc">Fast module utility function (powers of two only).</div><div class="ttdef"><b>Definition:</b> <a href="memory_8hpp_source.html#l00045">memory.hpp:45</a></div></div>
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<div class="ttc" id="anamespaceentt_html_ac0b95d19a5709187e6906a5a9c407b55"><div class="ttname"><a href="namespaceentt.html#ac0b95d19a5709187e6906a5a9c407b55">entt::next_power_of_two</a></div><div class="ttdeci">constexpr std::size_t next_power_of_two(const std::size_t value) noexcept</div><div class="ttdoc">Computes the smallest power of two greater than or equal to a value.</div><div class="ttdef"><b>Definition:</b> <a href="memory_8hpp_source.html#l00028">memory.hpp:28</a></div></div>
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<div class="ttc" id="anamespaceentt_html_ac447ddab9d528647a79fd9aca429faed"><div class="ttname"><a href="namespaceentt.html#ac447ddab9d528647a79fd9aca429faed">entt::uses_allocator_construction_args</a></div><div class="ttdeci">constexpr auto uses_allocator_construction_args(const Allocator &allocator, Args &&...args) noexcept</div><div class="ttdoc">Uses-allocator construction utility (waiting for C++20).</div><div class="ttdef"><b>Definition:</b> <a href="memory_8hpp_source.html#l00246">memory.hpp:246</a></div></div>
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<div class="ttc" id="anamespaceentt_html_ae3729f1b7699d013f982b2de2ec781f9"><div class="ttname"><a href="namespaceentt.html#ae3729f1b7699d013f982b2de2ec781f9">entt::allocate_unique</a></div><div class="ttdeci">constexpr auto allocate_unique(Allocator &allocator, Args &&...args)</div><div class="ttdoc">Allows std::unique_ptr to use allocators (waiting for C++20).</div><div class="ttdef"><b>Definition:</b> <a href="memory_8hpp_source.html#l00146">memory.hpp:146</a></div></div>
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<div class="ttc" id="anamespaceentt_html_ae934980252d1f2ce8f2473c8d74347df"><div class="ttname"><a href="namespaceentt.html#ae934980252d1f2ce8f2473c8d74347df">entt::propagate_on_container_copy_assignment</a></div><div class="ttdeci">constexpr void propagate_on_container_copy_assignment(Allocator &lhs, Allocator &rhs) noexcept</div><div class="ttdoc">Utility function to design allocation-aware containers.</div><div class="ttdef"><b>Definition:</b> <a href="memory_8hpp_source.html#l00072">memory.hpp:72</a></div></div>
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<div class="ttc" id="anamespaceentt_html_af0ecb90b45a53e3272d761c237a0d850"><div class="ttname"><a href="namespaceentt.html#af0ecb90b45a53e3272d761c237a0d850">entt::to_address</a></div><div class="ttdeci">constexpr auto to_address(Type &&ptr) noexcept</div><div class="ttdoc">Unwraps fancy pointers, does nothing otherwise (waiting for C++20).</div><div class="ttdef"><b>Definition:</b> <a href="memory_8hpp_source.html#l00057">memory.hpp:57</a></div></div>
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<div class="ttc" id="astructentt_1_1allocation__deleter_html"><div class="ttname"><a href="structentt_1_1allocation__deleter.html">entt::allocation_deleter</a></div><div class="ttdoc">Deleter for allocator-aware unique pointers (waiting for C++20).</div><div class="ttdef"><b>Definition:</b> <a href="memory_8hpp_source.html#l00112">memory.hpp:112</a></div></div>
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<div class="ttc" id="astructentt_1_1allocation__deleter_html_a37186f63eb16409b00b0261041b68c5c"><div class="ttname"><a href="structentt_1_1allocation__deleter.html#a37186f63eb16409b00b0261041b68c5c">entt::allocation_deleter::pointer</a></div><div class="ttdeci">typename std::allocator_traits< Allocator >::pointer pointer</div><div class="ttdoc">Pointer type.</div><div class="ttdef"><b>Definition:</b> <a href="memory_8hpp_source.html#l00116">memory.hpp:116</a></div></div>
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<div class="ttc" id="astructentt_1_1allocation__deleter_html_a5adbf1ba5d47a86d0b67d2c565fed220"><div class="ttname"><a href="structentt_1_1allocation__deleter.html#a5adbf1ba5d47a86d0b67d2c565fed220">entt::allocation_deleter::allocation_deleter</a></div><div class="ttdeci">constexpr allocation_deleter(const allocator_type &alloc) noexcept(std::is_nothrow_copy_constructible_v< allocator_type >)</div><div class="ttdoc">Inherited constructors.</div><div class="ttdef"><b>Definition:</b> <a href="memory_8hpp_source.html#l00122">memory.hpp:122</a></div></div>
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<div class="ttc" id="astructentt_1_1allocation__deleter_html_aaeea55e9539671ec5d6b1660f25e57d3"><div class="ttname"><a href="structentt_1_1allocation__deleter.html#aaeea55e9539671ec5d6b1660f25e57d3">entt::allocation_deleter::operator()</a></div><div class="ttdeci">constexpr void operator()(pointer ptr) noexcept(std::is_nothrow_destructible_v< typename allocator_type::value_type >)</div><div class="ttdoc">Destroys the pointed object and deallocates its memory.</div><div class="ttdef"><b>Definition:</b> <a href="memory_8hpp_source.html#l00129">memory.hpp:129</a></div></div>
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<div class="ttc" id="astructentt_1_1allocation__deleter_html_abce9d9de78a31b79e98745f4e029c863"><div class="ttname"><a href="structentt_1_1allocation__deleter.html#abce9d9de78a31b79e98745f4e029c863">entt::allocation_deleter::allocator_type</a></div><div class="ttdeci">Allocator allocator_type</div><div class="ttdoc">Allocator type.</div><div class="ttdef"><b>Definition:</b> <a href="memory_8hpp_source.html#l00114">memory.hpp:114</a></div></div>
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