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<div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="preprocessor">#ifndef ENTT_ENTITY_REGISTRY_HPP</span></div><div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="preprocessor">#define ENTT_ENTITY_REGISTRY_HPP</span></div><div class="line"><a name="l00003"></a><span class="lineno"> 3</span> </div><div class="line"><a name="l00004"></a><span class="lineno"> 4</span> </div><div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="preprocessor">#include <vector></span></div><div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="preprocessor">#include <memory></span></div><div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="preprocessor">#include <utility></span></div><div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="preprocessor">#include <cstddef></span></div><div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="preprocessor">#include <cassert></span></div><div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="preprocessor">#include "../core/family.hpp"</span></div><div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="preprocessor">#include "sparse_set.hpp"</span></div><div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="preprocessor">#include "traits.hpp"</span></div><div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="preprocessor">#include "view.hpp"</span></div><div class="line"><a name="l00014"></a><span class="lineno"> 14</span> </div><div class="line"><a name="l00015"></a><span class="lineno"> 15</span> </div><div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="keyword">namespace </span><a class="code" href="namespaceentt.html">entt</a> {</div><div class="line"><a name="l00017"></a><span class="lineno"> 17</span> </div><div class="line"><a name="l00018"></a><span class="lineno"> 18</span> </div><div class="line"><a name="l00029"></a><span class="lineno"> 29</span> <span class="keyword">template</span><<span class="keyword">typename</span> Entity></div><div class="line"><a name="l00030"></a><span class="lineno"><a class="line" href="classentt_1_1Registry.html"> 30</a></span> <span class="keyword">class </span><a class="code" href="classentt_1_1Registry.html">Registry</a> {</div><div class="line"><a name="l00031"></a><span class="lineno"> 31</span>  <span class="keyword">using</span> <a class="code" href="classentt_1_1Family.html">component_family</a> = <a class="code" href="classentt_1_1Family.html">Family<struct InternalRegistryComponentFamily></a>;</div><div class="line"><a name="l00032"></a><span class="lineno"> 32</span>  <span class="keyword">using</span> <a class="code" href="classentt_1_1Family.html">view_family</a> = <a class="code" href="classentt_1_1Family.html">Family<struct InternalRegistryViewFamily></a>;</div><div class="line"><a name="l00033"></a><span class="lineno"> 33</span>  <span class="keyword">using</span> <a class="code" href="structentt_1_1entt__traits.html">traits_type</a> = <a class="code" href="structentt_1_1entt__traits.html">entt_traits<Entity></a>;</div><div class="line"><a name="l00034"></a><span class="lineno"> 34</span> </div><div class="line"><a name="l00035"></a><span class="lineno"> 35</span>  <span class="keyword">template</span><<span class="keyword">typename</span> Component></div><div class="line"><a name="l00036"></a><span class="lineno"> 36</span>  <span class="keyword">struct </span>Pool: <a class="code" href="classentt_1_1SparseSet.html">SparseSet</a><Entity, Component> {</div><div class="line"><a name="l00037"></a><span class="lineno"> 37</span>  <span class="keyword">using</span> test_fn_type = bool(<a class="code" href="classentt_1_1Registry.html">Registry</a>::*)(Entity) <span class="keyword">const</span>;</div><div class="line"><a name="l00038"></a><span class="lineno"> 38</span> </div><div class="line"><a name="l00039"></a><span class="lineno"> 39</span>  <span class="keyword">template</span><<span class="keyword">typename</span>... Args></div><div class="line"><a name="l00040"></a><span class="lineno"> 40</span>  Component & construct(<a class="code" href="classentt_1_1Registry.html">Registry</a> &registry, Entity entity, Args&&... args) {</div><div class="line"><a name="l00041"></a><span class="lineno"> 41</span>  <span class="keyword">auto</span> &component = <a class="code" href="classentt_1_1SparseSet.html">SparseSet<Entity, Component>::construct</a>(entity, std::forward<Args>(args)...);</div><div class="line"><a name="l00042"></a><span class="lineno"> 42</span> </div><div class="line"><a name="l00043"></a><span class="lineno"> 43</span>  <span class="keywordflow">for</span>(<span class="keyword">auto</span> &&listener: listeners) {</div><div class="line"><a name="l00044"></a><span class="lineno"> 44</span>  <span class="keywordflow">if</span>((registry.*listener.second)(entity)) {</div><div class="line"><a name="l00045"></a><span class="lineno"> 45</span>  listener.first.construct(entity);</div><div class="line"><a name="l00046"></a><span class="lineno"> 46</span>  }</div><div class="line"><a name="l00047"></a><span class="lineno"> 47</span>  }</div><div class="line"><a name="l00048"></a><span class="lineno"> 48</span> </div><div class="line"><a name="l00049"></a><span class="lineno"> 49</span>  <span class="keywordflow">return</span> component;</div><div class="line"><a name="l00050"></a><span class="lineno"> 50</span>  }</div><div class="line"><a name="l00051"></a><span class="lineno"> 51</span> </div><div class="line"><a name="l00052"></a><span class="lineno"> 52</span>  <span class="keywordtype">void</span> <a class="code" href="classentt_1_1Registry.html#afe1fc933ce101207a49b6bdeafa2ce41">destroy</a>(Entity entity)<span class="keyword"> override </span>{</div><div class="line"><a name="l00053"></a><span class="lineno"> 53</span>  <a class="code" href="classentt_1_1SparseSet.html">SparseSet<Entity, Component>::destroy</a>(entity);</div><div class="line"><a name="l00054"></a><span class="lineno"> 54</span> </div><div class="line"><a name="l00055"></a><span class="lineno"> 55</span>  <span class="keywordflow">for</span>(<span class="keyword">auto</span> &&listener: listeners) {</div><div class="line"><a name="l00056"></a><span class="lineno"> 56</span>  <span class="keyword">auto</span> &handler = listener.first;</div><div class="line"><a name="l00057"></a><span class="lineno"> 57</span> </div><div class="line"><a name="l00058"></a><span class="lineno"> 58</span>  <span class="keywordflow">if</span>(handler.has(entity)) {</div><div class="line"><a name="l00059"></a><span class="lineno"> 59</span>  handler.destroy(entity);</div><div class="line"><a name="l00060"></a><span class="lineno"> 60</span>  }</div><div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  }</div><div class="line"><a name="l00062"></a><span class="lineno"> 62</span>  }</div><div class="line"><a name="l00063"></a><span class="lineno"> 63</span> </div><div class="line"><a name="l00064"></a><span class="lineno"> 64</span>  <span class="keywordtype">void</span> append(<a class="code" href="classentt_1_1SparseSet_3_01Entity_01_4.html">SparseSet<Entity></a> &handler, test_fn_type fn) {</div><div class="line"><a name="l00065"></a><span class="lineno"> 65</span>  listeners.emplace_back(handler, fn);</div><div class="line"><a name="l00066"></a><span class="lineno"> 66</span>  }</div><div class="line"><a name="l00067"></a><span class="lineno"> 67</span> </div><div class="line"><a name="l00068"></a><span class="lineno"> 68</span>  <span class="keyword">private</span>:</div><div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  std::vector<std::pair<SparseSet<Entity> &, test_fn_type>> listeners;</div><div class="line"><a name="l00070"></a><span class="lineno"> 70</span>  };</div><div class="line"><a name="l00071"></a><span class="lineno"> 71</span> </div><div class="line"><a name="l00072"></a><span class="lineno"> 72</span>  <span class="keyword">template</span><<span class="keyword">typename</span> Component></div><div class="line"><a name="l00073"></a><span class="lineno"> 73</span>  <span class="keywordtype">bool</span> managed() <span class="keyword">const</span> noexcept {</div><div class="line"><a name="l00074"></a><span class="lineno"> 74</span>  <span class="keyword">const</span> <span class="keyword">auto</span> ctype = component_family::type<Component>();</div><div class="line"><a name="l00075"></a><span class="lineno"> 75</span>  <span class="keywordflow">return</span> ctype < pools.size() && pools[ctype];</div><div class="line"><a name="l00076"></a><span class="lineno"> 76</span>  }</div><div class="line"><a name="l00077"></a><span class="lineno"> 77</span> </div><div class="line"><a name="l00078"></a><span class="lineno"> 78</span>  <span class="keyword">template</span><<span class="keyword">typename</span> Component></div><div class="line"><a name="l00079"></a><span class="lineno"> 79</span>  <span class="keyword">const</span> Pool<Component> & pool() <span class="keyword">const</span> noexcept {</div><div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  assert(managed<Component>());</div><div class="line"><a name="l00081"></a><span class="lineno"> 81</span>  <span class="keywordflow">return</span> <span class="keyword">static_cast<</span>Pool<Component> &<span class="keyword">></span>(*pools[component_family::type<Component>()]);</div><div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  }</div><div class="line"><a name="l00083"></a><span class="lineno"> 83</span> </div><div class="line"><a name="l00084"></a><span class="lineno"> 84</span>  <span class="keyword">template</span><<span class="keyword">typename</span> Component></div><div class="line"><a name="l00085"></a><span class="lineno"> 85</span>  Pool<Component> & pool() noexcept {</div><div class="line"><a name="l00086"></a><span class="lineno"> 86</span>  assert(managed<Component>());</div><div class="line"><a name="l00087"></a><span class="lineno"> 87</span>  <span class="keywordflow">return</span> <span class="keyword">const_cast<</span>Pool<Component> &<span class="keyword">></span>(<span class="keyword">const_cast<</span><span class="keyword">const </span><a class="code" href="classentt_1_1Registry.html">Registry</a> *<span class="keyword">></span>(<span class="keyword">this</span>)->pool<Component>());</div><div class="line"><a name="l00088"></a><span class="lineno"> 88</span>  }</div><div class="line"><a name="l00089"></a><span class="lineno"> 89</span> </div><div class="line"><a name="l00090"></a><span class="lineno"> 90</span>  <span class="keyword">template</span><<span class="keyword">typename</span> Component></div><div class="line"><a name="l00091"></a><span class="lineno"> 91</span>  Pool<Component> & ensure() {</div><div class="line"><a name="l00092"></a><span class="lineno"> 92</span>  <span class="keyword">const</span> <span class="keyword">auto</span> ctype = component_family::type<Component>();</div><div class="line"><a name="l00093"></a><span class="lineno"> 93</span> </div><div class="line"><a name="l00094"></a><span class="lineno"> 94</span>  <span class="keywordflow">if</span>(!(ctype < pools.size())) {</div><div class="line"><a name="l00095"></a><span class="lineno"> 95</span>  pools.resize(ctype + 1);</div><div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  }</div><div class="line"><a name="l00097"></a><span class="lineno"> 97</span> </div><div class="line"><a name="l00098"></a><span class="lineno"> 98</span>  <span class="keywordflow">if</span>(!pools[ctype]) {</div><div class="line"><a name="l00099"></a><span class="lineno"> 99</span>  pools[ctype] = std::make_unique<Pool<Component>>();</div><div class="line"><a name="l00100"></a><span class="lineno"> 100</span>  }</div><div class="line"><a name="l00101"></a><span class="lineno"> 101</span> </div><div class="line"><a name="l00102"></a><span class="lineno"> 102</span>  <span class="keywordflow">return</span> pool<Component>();</div><div class="line"><a name="l00103"></a><span class="lineno"> 103</span>  }</div><div class="line"><a name="l00104"></a><span class="lineno"> 104</span> </div><div class="line"><a name="l00105"></a><span class="lineno"> 105</span> <span class="keyword">public</span>:</div><div class="line"><a name="l00107"></a><span class="lineno"><a class="line" href="classentt_1_1Registry.html#ad434a1920dd2c6a9a31ab482e2f29038"> 107</a></span>  <span class="keyword">using</span> <a class="code" href="classentt_1_1Registry.html#ad434a1920dd2c6a9a31ab482e2f29038">entity_type</a> = <span class="keyword">typename</span> traits_type::entity_type;</div><div class="line"><a name="l00109"></a><span class="lineno"><a class="line" href="classentt_1_1Registry.html#a82c8996277034df5e72b5f30a70ebb2d"> 109</a></span>  <span class="keyword">using</span> <a class="code" href="classentt_1_1Registry.html#a82c8996277034df5e72b5f30a70ebb2d">version_type</a> = <span class="keyword">typename</span> traits_type::version_type;</div><div class="line"><a name="l00111"></a><span class="lineno"><a class="line" href="classentt_1_1Registry.html#a741ffda6e06838c5593ba97adc7658e2"> 111</a></span>  <span class="keyword">using</span> <a class="code" href="classentt_1_1Registry.html#a741ffda6e06838c5593ba97adc7658e2">size_type</a> = std::size_t;</div><div class="line"><a name="l00112"></a><span class="lineno"> 112</span> </div><div class="line"><a name="l00114"></a><span class="lineno"> 114</span>  <span class="keyword">explicit</span> <a class="code" href="classentt_1_1Registry.html#ab5022bf3ac71d209cb9b85e686324f28">Registry</a>() = <span class="keywordflow">default</span>;</div><div class="line"><a name="l00116"></a><span class="lineno"> 116</span>  <a class="code" href="classentt_1_1Registry.html#a82cdceea5721c9b227cdef6d69020047">~Registry</a>() = <span class="keywordflow">default</span>;</div><div class="line"><a name="l00117"></a><span class="lineno"> 117</span> </div><div class="line"><a name="l00119"></a><span class="lineno"> 119</span>  <a class="code" href="classentt_1_1Registry.html#ab5022bf3ac71d209cb9b85e686324f28">Registry</a>(<span class="keyword">const</span> <a class="code" href="classentt_1_1Registry.html">Registry</a> &) = <span class="keyword">delete</span>;</div><div class="line"><a name="l00121"></a><span class="lineno"> 121</span>  <a class="code" href="classentt_1_1Registry.html#ab5022bf3ac71d209cb9b85e686324f28">Registry</a>(<a class="code" href="classentt_1_1Registry.html">Registry</a> &&) = <span class="keyword">delete</span>;</div><div class="line"><a name="l00122"></a><span class="lineno"> 122</span> </div><div class="line"><a name="l00124"></a><span class="lineno"> 124</span>  <a class="code" href="classentt_1_1Registry.html">Registry</a> & <a class="code" href="classentt_1_1Registry.html#a6ff250745f1774984a9524d63855f26d">operator=</a>(<span class="keyword">const</span> <a class="code" href="classentt_1_1Registry.html">Registry</a> &) = <span class="keyword">delete</span>;</div><div class="line"><a name="l00126"></a><span class="lineno"> 126</span>  <a class="code" href="classentt_1_1Registry.html">Registry</a> & <a class="code" href="classentt_1_1Registry.html#a6ff250745f1774984a9524d63855f26d">operator=</a>(<a class="code" href="classentt_1_1Registry.html">Registry</a> &&) = <span class="keyword">delete</span>;</div><div class="line"><a name="l00127"></a><span class="lineno"> 127</span> </div><div class="line"><a name="l00133"></a><span class="lineno"> 133</span>  <span class="keyword">template</span><<span class="keyword">typename</span> Component></div><div class="line"><a name="l00134"></a><span class="lineno"><a class="line" href="classentt_1_1Registry.html#a16f0e2c46c7f95ce9f16561bbeb6c52c"> 134</a></span>  <a class="code" href="classentt_1_1Registry.html#a741ffda6e06838c5593ba97adc7658e2">size_type</a> <a class="code" href="classentt_1_1Registry.html#a16f0e2c46c7f95ce9f16561bbeb6c52c">size</a>() const noexcept {</div><div class="line"><a name="l00135"></a><span class="lineno"> 135</span>  <span class="keywordflow">return</span> managed<Component>() ? pool<Component>().size() : <a class="code" href="classentt_1_1Registry.html#a741ffda6e06838c5593ba97adc7658e2">size_type</a>{};</div><div class="line"><a name="l00136"></a><span class="lineno"> 136</span>  }</div><div class="line"><a name="l00137"></a><span class="lineno"> 137</span> </div><div class="line"><a name="l00142"></a><span class="lineno"><a class="line" href="classentt_1_1Registry.html#a19f832202e918acd5e3708c1c7f33951"> 142</a></span>  <a class="code" href="classentt_1_1Registry.html#a741ffda6e06838c5593ba97adc7658e2">size_type</a> <a class="code" href="classentt_1_1Registry.html#a19f832202e918acd5e3708c1c7f33951">size</a>() const noexcept {</div><div class="line"><a name="l00143"></a><span class="lineno"> 143</span>  <span class="keywordflow">return</span> entities.size() - available.size();</div><div class="line"><a name="l00144"></a><span class="lineno"> 144</span>  }</div><div class="line"><a name="l00145"></a><span class="lineno"> 145</span> </div><div class="line"><a name="l00150"></a><span class="lineno"><a class="line" href="classentt_1_1Registry.html#af51d1553722e555eb1557fc0c68f104a"> 150</a></span>  <a class="code" href="classentt_1_1Registry.html#a741ffda6e06838c5593ba97adc7658e2">size_type</a> <a class="code" href="classentt_1_1Registry.html#af51d1553722e555eb1557fc0c68f104a">capacity</a>() const noexcept {</div><div class="line"><a name="l00151"></a><span class="lineno"> 151</span>  <span class="keywordflow">return</span> entities.size();</div><div class="line"><a name="l00152"></a><span class="lineno"> 152</span>  }</div><div class="line"><a name="l00153"></a><span class="lineno"> 153</span> </div><div class="line"><a name="l00160"></a><span class="lineno"> 160</span>  <span class="keyword">template</span><<span class="keyword">typename</span> Component></div><div class="line"><a name="l00161"></a><span class="lineno"><a class="line" href="classentt_1_1Registry.html#afccc9bc4af28b679d761f365655e1d42"> 161</a></span>  <span class="keywordtype">bool</span> <a class="code" href="classentt_1_1Registry.html#afccc9bc4af28b679d761f365655e1d42">empty</a>() const noexcept {</div><div class="line"><a name="l00162"></a><span class="lineno"> 162</span>  <span class="keywordflow">return</span> managed<Component>() ? pool<Component>().empty() : <span class="keyword">true</span>;</div><div class="line"><a name="l00163"></a><span class="lineno"> 163</span>  }</div><div class="line"><a name="l00164"></a><span class="lineno"> 164</span> </div><div class="line"><a name="l00169"></a><span class="lineno"><a class="line" href="classentt_1_1Registry.html#a75ed5006f4be9ea8489a48ef40247e29"> 169</a></span>  <span class="keywordtype">bool</span> <a class="code" href="classentt_1_1Registry.html#a75ed5006f4be9ea8489a48ef40247e29">empty</a>() const noexcept {</div><div class="line"><a name="l00170"></a><span class="lineno"> 170</span>  <span class="keywordflow">return</span> entities.size() == available.size();</div><div class="line"><a name="l00171"></a><span class="lineno"> 171</span>  }</div><div class="line"><a name="l00172"></a><span class="lineno"> 172</span> </div><div class="line"><a name="l00178"></a><span class="lineno"><a class="line" href="classentt_1_1Registry.html#a11a759638bf2c28ac1670c7b533ca53f"> 178</a></span>  <span class="keywordtype">bool</span> <a class="code" href="classentt_1_1Registry.html#a11a759638bf2c28ac1670c7b533ca53f">valid</a>(<a class="code" href="classentt_1_1Registry.html#ad434a1920dd2c6a9a31ab482e2f29038">entity_type</a> entity) <span class="keyword">const</span> noexcept {</div><div class="line"><a name="l00179"></a><span class="lineno"> 179</span>  <span class="keyword">const</span> <span class="keyword">auto</span> <a class="code" href="namespaceentt.html">entt</a> = entity & traits_type::entity_mask;</div><div class="line"><a name="l00180"></a><span class="lineno"> 180</span>  <span class="keywordflow">return</span> (<a class="code" href="namespaceentt.html">entt</a> < entities.size() && entities[<a class="code" href="namespaceentt.html">entt</a>] == entity);</div><div class="line"><a name="l00181"></a><span class="lineno"> 181</span>  }</div><div class="line"><a name="l00182"></a><span class="lineno"> 182</span> </div><div class="line"><a name="l00188"></a><span class="lineno"><a class="line" href="classentt_1_1Registry.html#a773c2bb361f4e83aae1349ccfeede56b"> 188</a></span>  <a class="code" href="classentt_1_1Registry.html#a82c8996277034df5e72b5f30a70ebb2d">version_type</a> <a class="code" href="classentt_1_1Registry.html#a773c2bb361f4e83aae1349ccfeede56b">version</a>(<a class="code" href="classentt_1_1Registry.html#ad434a1920dd2c6a9a31ab482e2f29038">entity_type</a> entity) <span class="keyword">const</span> noexcept {</div><div class="line"><a name="l00189"></a><span class="lineno"> 189</span>  <span class="keywordflow">return</span> <a class="code" href="classentt_1_1Registry.html#a82c8996277034df5e72b5f30a70ebb2d">version_type</a>((entity >> traits_type::version_shift) & traits_type::version_mask);</div><div class="line"><a name="l00190"></a><span class="lineno"> 190</span>  }</div><div class="line"><a name="l00191"></a><span class="lineno"> 191</span> </div><div class="line"><a name="l00209"></a><span class="lineno"><a class="line" href="classentt_1_1Registry.html#a4e1a07f4170764925864b162277485b6"> 209</a></span>  <a class="code" href="classentt_1_1Registry.html#a82c8996277034df5e72b5f30a70ebb2d">version_type</a> <a class="code" href="classentt_1_1Registry.html#a4e1a07f4170764925864b162277485b6">current</a>(<a class="code" href="classentt_1_1Registry.html#ad434a1920dd2c6a9a31ab482e2f29038">entity_type</a> entity) <span class="keyword">const</span> noexcept {</div><div class="line"><a name="l00210"></a><span class="lineno"> 210</span>  <span class="keyword">const</span> <span class="keyword">auto</span> <a class="code" href="namespaceentt.html">entt</a> = entity & traits_type::entity_mask;</div><div class="line"><a name="l00211"></a><span class="lineno"> 211</span>  assert(<a class="code" href="namespaceentt.html">entt</a> < entities.size());</div><div class="line"><a name="l00212"></a><span class="lineno"> 212</span>  <span class="keywordflow">return</span> <a class="code" href="classentt_1_1Registry.html#a82c8996277034df5e72b5f30a70ebb2d">version_type</a>((entities[<a class="code" href="namespaceentt.html">entt</a>] >> traits_type::version_shift) & traits_type::version_mask);</div><div class="line"><a name="l00213"></a><span class="lineno"> 213</span>  }</div><div class="line"><a name="l00214"></a><span class="lineno"> 214</span> </div><div class="line"><a name="l00230"></a><span class="lineno"> 230</span>  <span class="keyword">template</span><<span class="keyword">typename</span>... Component></div><div class="line"><a name="l00231"></a><span class="lineno"><a class="line" href="classentt_1_1Registry.html#ae3c9cd27360a869f1e192d159447b5e4"> 231</a></span>  <a class="code" href="classentt_1_1Registry.html#ad434a1920dd2c6a9a31ab482e2f29038">entity_type</a> <a class="code" href="classentt_1_1Registry.html#ae3c9cd27360a869f1e192d159447b5e4">create</a>() noexcept {</div><div class="line"><a name="l00232"></a><span class="lineno"> 232</span>  <span class="keyword">using</span> accumulator_type = <span class="keywordtype">int</span>[];</div><div class="line"><a name="l00233"></a><span class="lineno"> 233</span>  <span class="keyword">const</span> <span class="keyword">auto</span> entity = <a class="code" href="classentt_1_1Registry.html#ae3c9cd27360a869f1e192d159447b5e4">create</a>();</div><div class="line"><a name="l00234"></a><span class="lineno"> 234</span>  accumulator_type accumulator = { 0, (ensure<Component>().construct(*<span class="keyword">this</span>, entity), 0)... };</div><div class="line"><a name="l00235"></a><span class="lineno"> 235</span>  (void)accumulator;</div><div class="line"><a name="l00236"></a><span class="lineno"> 236</span>  <span class="keywordflow">return</span> entity;</div><div class="line"><a name="l00237"></a><span class="lineno"> 237</span>  }</div><div class="line"><a name="l00238"></a><span class="lineno"> 238</span> </div><div class="line"><a name="l00253"></a><span class="lineno"><a class="line" href="classentt_1_1Registry.html#ae1d9f447dfda4794f8d364965eab6586"> 253</a></span>  <a class="code" href="classentt_1_1Registry.html#ad434a1920dd2c6a9a31ab482e2f29038">entity_type</a> <a class="code" href="classentt_1_1Registry.html#ae1d9f447dfda4794f8d364965eab6586">create</a>() noexcept {</div><div class="line"><a name="l00254"></a><span class="lineno"> 254</span>  <a class="code" href="classentt_1_1Registry.html#ad434a1920dd2c6a9a31ab482e2f29038">entity_type</a> entity;</div><div class="line"><a name="l00255"></a><span class="lineno"> 255</span> </div><div class="line"><a name="l00256"></a><span class="lineno"> 256</span>  <span class="keywordflow">if</span>(available.empty()) {</div><div class="line"><a name="l00257"></a><span class="lineno"> 257</span>  entity = <a class="code" href="classentt_1_1Registry.html#ad434a1920dd2c6a9a31ab482e2f29038">entity_type</a>(entities.size());</div><div class="line"><a name="l00258"></a><span class="lineno"> 258</span>  assert((entity >> traits_type::version_shift) == <a class="code" href="classentt_1_1Registry.html#ad434a1920dd2c6a9a31ab482e2f29038">entity_type</a>{});</div><div class="line"><a name="l00259"></a><span class="lineno"> 259</span>  entities.push_back(entity);</div><div class="line"><a name="l00260"></a><span class="lineno"> 260</span>  } <span class="keywordflow">else</span> {</div><div class="line"><a name="l00261"></a><span class="lineno"> 261</span>  entity = available.back();</div><div class="line"><a name="l00262"></a><span class="lineno"> 262</span>  available.pop_back();</div><div class="line"><a name="l00263"></a><span class="lineno"> 263</span>  }</div><div class="line"><a name="l00264"></a><span class="lineno"> 264</span> </div><div class="line"><a name="l00265"></a><span class="lineno"> 265</span>  <span class="keywordflow">return</span> entity;</div><div class="line"><a name="l00266"></a><span class="lineno"> 266</span>  }</div><div class="line"><a name="l00267"></a><span class="lineno"> 267</span> </div><div class="line"><a name="l00283"></a><span class="lineno"><a class="line" href="classentt_1_1Registry.html#afe1fc933ce101207a49b6bdeafa2ce41"> 283</a></span>  <span class="keywordtype">void</span> <a class="code" href="classentt_1_1Registry.html#afe1fc933ce101207a49b6bdeafa2ce41">destroy</a>(<a class="code" href="classentt_1_1Registry.html#ad434a1920dd2c6a9a31ab482e2f29038">entity_type</a> entity) {</div><div class="line"><a name="l00284"></a><span class="lineno"> 284</span>  assert(<a class="code" href="classentt_1_1Registry.html#a11a759638bf2c28ac1670c7b533ca53f">valid</a>(entity));</div><div class="line"><a name="l00285"></a><span class="lineno"> 285</span> </div><div class="line"><a name="l00286"></a><span class="lineno"> 286</span>  <span class="keyword">const</span> <span class="keyword">auto</span> <a class="code" href="namespaceentt.html">entt</a> = entity & traits_type::entity_mask;</div><div class="line"><a name="l00287"></a><span class="lineno"> 287</span>  <span class="keyword">const</span> <span class="keyword">auto</span> <a class="code" href="classentt_1_1Registry.html#a773c2bb361f4e83aae1349ccfeede56b">version</a> = 1 + ((entity >> traits_type::version_shift) & traits_type::version_mask);</div><div class="line"><a name="l00288"></a><span class="lineno"> 288</span>  <span class="keyword">const</span> <span class="keyword">auto</span> next = <a class="code" href="namespaceentt.html">entt</a> | (<a class="code" href="classentt_1_1Registry.html#a773c2bb361f4e83aae1349ccfeede56b">version</a> << traits_type::version_shift);</div><div class="line"><a name="l00289"></a><span class="lineno"> 289</span>  entities[<a class="code" href="namespaceentt.html">entt</a>] = next;</div><div class="line"><a name="l00290"></a><span class="lineno"> 290</span>  available.push_back(next);</div><div class="line"><a name="l00291"></a><span class="lineno"> 291</span> </div><div class="line"><a name="l00292"></a><span class="lineno"> 292</span>  <span class="keywordflow">for</span>(<span class="keyword">auto</span> &&cpool: pools) {</div><div class="line"><a name="l00293"></a><span class="lineno"> 293</span>  <span class="keywordflow">if</span>(cpool && cpool->has(entity)) {</div><div class="line"><a name="l00294"></a><span class="lineno"> 294</span>  cpool->destroy(entity);</div><div class="line"><a name="l00295"></a><span class="lineno"> 295</span>  }</div><div class="line"><a name="l00296"></a><span class="lineno"> 296</span>  }</div><div class="line"><a name="l00297"></a><span class="lineno"> 297</span>  }</div><div class="line"><a name="l00298"></a><span class="lineno"> 298</span> </div><div class="line"><a name="l00319"></a><span class="lineno"> 319</span>  <span class="keyword">template</span><<span class="keyword">typename</span> Component, <span class="keyword">typename</span>... Args></div><div class="line"><a name="l00320"></a><span class="lineno"><a class="line" href="classentt_1_1Registry.html#aa6b578d40a9305869e692167fc3dcddf"> 320</a></span>  Component & <a class="code" href="classentt_1_1Registry.html#aa6b578d40a9305869e692167fc3dcddf">assign</a>(<a class="code" href="classentt_1_1Registry.html#ad434a1920dd2c6a9a31ab482e2f29038">entity_type</a> entity, Args&&... args) {</div><div class="line"><a name="l00321"></a><span class="lineno"> 321</span>  assert(<a class="code" href="classentt_1_1Registry.html#a11a759638bf2c28ac1670c7b533ca53f">valid</a>(entity));</div><div class="line"><a name="l00322"></a><span class="lineno"> 322</span>  <span class="keywordflow">return</span> ensure<Component>().construct(*<span class="keyword">this</span>, entity, std::forward<Args>(args)...);</div><div class="line"><a name="l00323"></a><span class="lineno"> 323</span>  }</div><div class="line"><a name="l00324"></a><span class="lineno"> 324</span> </div><div class="line"><a name="l00338"></a><span class="lineno"> 338</span>  <span class="keyword">template</span><<span class="keyword">typename</span> Component></div><div class="line"><a name="l00339"></a><span class="lineno"><a class="line" href="classentt_1_1Registry.html#a856e1f92b8c1c523e66035481ef4ab8d"> 339</a></span>  <span class="keywordtype">void</span> <span class="keyword">remove</span>(<a class="code" href="classentt_1_1Registry.html#ad434a1920dd2c6a9a31ab482e2f29038">entity_type</a> entity) {</div><div class="line"><a name="l00340"></a><span class="lineno"> 340</span>  assert(<a class="code" href="classentt_1_1Registry.html#a11a759638bf2c28ac1670c7b533ca53f">valid</a>(entity));</div><div class="line"><a name="l00341"></a><span class="lineno"> 341</span>  <span class="keywordflow">return</span> pool<Component>().<a class="code" href="classentt_1_1Registry.html#afe1fc933ce101207a49b6bdeafa2ce41">destroy</a>(entity);</div><div class="line"><a name="l00342"></a><span class="lineno"> 342</span>  }</div><div class="line"><a name="l00343"></a><span class="lineno"> 343</span> </div><div class="line"><a name="l00356"></a><span class="lineno"> 356</span>  <span class="keyword">template</span><<span class="keyword">typename</span>... Component></div><div class="line"><a name="l00357"></a><span class="lineno"><a class="line" href="classentt_1_1Registry.html#ace82d0e0181bf0872174e1774d729db4"> 357</a></span>  <span class="keywordtype">bool</span> <a class="code" href="classentt_1_1Registry.html#ace82d0e0181bf0872174e1774d729db4">has</a>(<a class="code" href="classentt_1_1Registry.html#ad434a1920dd2c6a9a31ab482e2f29038">entity_type</a> entity) <span class="keyword">const</span> noexcept {</div><div class="line"><a name="l00358"></a><span class="lineno"> 358</span>  static_assert(<span class="keyword">sizeof</span>...(Component) > 0, <span class="stringliteral">"!"</span>);</div><div class="line"><a name="l00359"></a><span class="lineno"> 359</span>  assert(<a class="code" href="classentt_1_1Registry.html#a11a759638bf2c28ac1670c7b533ca53f">valid</a>(entity));</div><div class="line"><a name="l00360"></a><span class="lineno"> 360</span>  <span class="keyword">using</span> accumulator_type = <span class="keywordtype">bool</span>[];</div><div class="line"><a name="l00361"></a><span class="lineno"> 361</span>  <span class="keywordtype">bool</span> all = <span class="keyword">true</span>;</div><div class="line"><a name="l00362"></a><span class="lineno"> 362</span>  accumulator_type accumulator = { (all = all && managed<Component>() && pool<Component>().has(entity))... };</div><div class="line"><a name="l00363"></a><span class="lineno"> 363</span>  (void)accumulator;</div><div class="line"><a name="l00364"></a><span class="lineno"> 364</span>  <span class="keywordflow">return</span> all;</div><div class="line"><a name="l00365"></a><span class="lineno"> 365</span>  }</div><div class="line"><a name="l00366"></a><span class="lineno"> 366</span> </div><div class="line"><a name="l00381"></a><span class="lineno"> 381</span>  <span class="keyword">template</span><<span class="keyword">typename</span> Component></div><div class="line"><a name="l00382"></a><span class="lineno"><a class="line" href="classentt_1_1Registry.html#a904b71bae3eaa69d534b4dc41c15e889"> 382</a></span>  <span class="keyword">const</span> Component & <span class="keyword">get</span>(<a class="code" href="classentt_1_1Registry.html#ad434a1920dd2c6a9a31ab482e2f29038">entity_type</a> entity) <span class="keyword">const</span> noexcept {</div><div class="line"><a name="l00383"></a><span class="lineno"> 383</span>  assert(<a class="code" href="classentt_1_1Registry.html#a11a759638bf2c28ac1670c7b533ca53f">valid</a>(entity));</div><div class="line"><a name="l00384"></a><span class="lineno"> 384</span>  <span class="keywordflow">return</span> pool<Component>().<span class="keyword">get</span>(entity);</div><div class="line"><a name="l00385"></a><span class="lineno"> 385</span>  }</div><div class="line"><a name="l00386"></a><span class="lineno"> 386</span> </div><div class="line"><a name="l00401"></a><span class="lineno"> 401</span>  <span class="keyword">template</span><<span class="keyword">typename</span> Component></div><div class="line"><a name="l00402"></a><span class="lineno"><a class="line" href="classentt_1_1Registry.html#a6b1cd324d6d080c68f61def36a7a4668"> 402</a></span>  Component & <span class="keyword">get</span>(<a class="code" href="classentt_1_1Registry.html#ad434a1920dd2c6a9a31ab482e2f29038">entity_type</a> entity) noexcept {</div><div class="line"><a name="l00403"></a><span class="lineno"> 403</span>  <span class="keywordflow">return</span> <span class="keyword">const_cast<</span>Component &<span class="keyword">></span>(<span class="keyword">const_cast<</span><span class="keyword">const </span><a class="code" href="classentt_1_1Registry.html">Registry</a> *<span class="keyword">></span>(<span class="keyword">this</span>)->get<Component>(entity));</div><div class="line"><a name="l00404"></a><span class="lineno"> 404</span>  }</div><div class="line"><a name="l00405"></a><span class="lineno"> 405</span> </div><div class="line"><a name="l00426"></a><span class="lineno"> 426</span>  <span class="keyword">template</span><<span class="keyword">typename</span> Component, <span class="keyword">typename</span>... Args></div><div class="line"><a name="l00427"></a><span class="lineno"><a class="line" href="classentt_1_1Registry.html#a5ce71508e824ea5ef0d95d4baef37503"> 427</a></span>  Component & <a class="code" href="classentt_1_1Registry.html#a5ce71508e824ea5ef0d95d4baef37503">replace</a>(<a class="code" href="classentt_1_1Registry.html#ad434a1920dd2c6a9a31ab482e2f29038">entity_type</a> entity, Args&&... args) {</div><div class="line"><a name="l00428"></a><span class="lineno"> 428</span>  assert(<a class="code" href="classentt_1_1Registry.html#a11a759638bf2c28ac1670c7b533ca53f">valid</a>(entity));</div><div class="line"><a name="l00429"></a><span class="lineno"> 429</span>  <span class="keywordflow">return</span> (pool<Component>().<span class="keyword">get</span>(entity) = Component{std::forward<Args>(args)...});</div><div class="line"><a name="l00430"></a><span class="lineno"> 430</span>  }</div><div class="line"><a name="l00431"></a><span class="lineno"> 431</span> </div><div class="line"><a name="l00459"></a><span class="lineno"> 459</span>  <span class="keyword">template</span><<span class="keyword">typename</span> Component, <span class="keyword">typename</span>... Args></div><div class="line"><a name="l00460"></a><span class="lineno"><a class="line" href="classentt_1_1Registry.html#a14524dac71cf528fcdccd74cdf230627"> 460</a></span>  Component & <a class="code" href="classentt_1_1Registry.html#a14524dac71cf528fcdccd74cdf230627">accomodate</a>(<a class="code" href="classentt_1_1Registry.html#ad434a1920dd2c6a9a31ab482e2f29038">entity_type</a> entity, Args&&... args) {</div><div class="line"><a name="l00461"></a><span class="lineno"> 461</span>  assert(<a class="code" href="classentt_1_1Registry.html#a11a759638bf2c28ac1670c7b533ca53f">valid</a>(entity));</div><div class="line"><a name="l00462"></a><span class="lineno"> 462</span>  <span class="keyword">auto</span> &cpool = ensure<Component>();</div><div class="line"><a name="l00463"></a><span class="lineno"> 463</span> </div><div class="line"><a name="l00464"></a><span class="lineno"> 464</span>  <span class="keywordflow">return</span> (cpool.has(entity)</div><div class="line"><a name="l00465"></a><span class="lineno"> 465</span>  ? (cpool.get(entity) = Component{std::forward<Args>(args)...})</div><div class="line"><a name="l00466"></a><span class="lineno"> 466</span>  : cpool.construct(*<span class="keyword">this</span>, entity, std::forward<Args>(args)...));</div><div class="line"><a name="l00467"></a><span class="lineno"> 467</span>  }</div><div class="line"><a name="l00468"></a><span class="lineno"> 468</span> </div><div class="line"><a name="l00494"></a><span class="lineno"> 494</span>  <span class="keyword">template</span><<span class="keyword">typename</span> Component, <span class="keyword">typename</span> Compare></div><div class="line"><a name="l00495"></a><span class="lineno"><a class="line" href="classentt_1_1Registry.html#a625ada828ff48c153c7be14cc99eeca5"> 495</a></span>  <span class="keywordtype">void</span> <a class="code" href="classentt_1_1Registry.html#a625ada828ff48c153c7be14cc99eeca5">sort</a>(Compare compare) {</div><div class="line"><a name="l00496"></a><span class="lineno"> 496</span>  <span class="keyword">auto</span> &cpool = ensure<Component>();</div><div class="line"><a name="l00497"></a><span class="lineno"> 497</span> </div><div class="line"><a name="l00498"></a><span class="lineno"> 498</span>  cpool.sort([&cpool, compare = std::move(compare)](<span class="keyword">auto</span> lhs, <span class="keyword">auto</span> rhs) {</div><div class="line"><a name="l00499"></a><span class="lineno"> 499</span>  <span class="keywordflow">return</span> compare(static_cast<const Component &>(cpool.get(lhs)), static_cast<const Component &>(cpool.get(rhs)));</div><div class="line"><a name="l00500"></a><span class="lineno"> 500</span>  });</div><div class="line"><a name="l00501"></a><span class="lineno"> 501</span>  }</div><div class="line"><a name="l00502"></a><span class="lineno"> 502</span> </div><div class="line"><a name="l00533"></a><span class="lineno"> 533</span>  <span class="keyword">template</span><<span class="keyword">typename</span> To, <span class="keyword">typename</span> From></div><div class="line"><a name="l00534"></a><span class="lineno"><a class="line" href="classentt_1_1Registry.html#aa3abb830a7ba342266b62ff1a2965754"> 534</a></span>  <span class="keywordtype">void</span> <a class="code" href="classentt_1_1Registry.html#aa3abb830a7ba342266b62ff1a2965754">sort</a>() {</div><div class="line"><a name="l00535"></a><span class="lineno"> 535</span>  ensure<To>().respect(ensure<From>());</div><div class="line"><a name="l00536"></a><span class="lineno"> 536</span>  }</div><div class="line"><a name="l00537"></a><span class="lineno"> 537</span> </div><div class="line"><a name="l00552"></a><span class="lineno"> 552</span>  <span class="keyword">template</span><<span class="keyword">typename</span> Component></div><div class="line"><a name="l00553"></a><span class="lineno"><a class="line" href="classentt_1_1Registry.html#ae58d20711dabcd4959a89e0928974136"> 553</a></span>  <span class="keywordtype">void</span> <a class="code" href="classentt_1_1Registry.html#ae58d20711dabcd4959a89e0928974136">reset</a>(<a class="code" href="classentt_1_1Registry.html#ad434a1920dd2c6a9a31ab482e2f29038">entity_type</a> entity) {</div><div class="line"><a name="l00554"></a><span class="lineno"> 554</span>  assert(<a class="code" href="classentt_1_1Registry.html#a11a759638bf2c28ac1670c7b533ca53f">valid</a>(entity));</div><div class="line"><a name="l00555"></a><span class="lineno"> 555</span> </div><div class="line"><a name="l00556"></a><span class="lineno"> 556</span>  <span class="keywordflow">if</span>(managed<Component>()) {</div><div class="line"><a name="l00557"></a><span class="lineno"> 557</span>  <span class="keyword">auto</span> &cpool = pool<Component>();</div><div class="line"><a name="l00558"></a><span class="lineno"> 558</span> </div><div class="line"><a name="l00559"></a><span class="lineno"> 559</span>  <span class="keywordflow">if</span>(cpool.has(entity)) {</div><div class="line"><a name="l00560"></a><span class="lineno"> 560</span>  cpool.destroy(entity);</div><div class="line"><a name="l00561"></a><span class="lineno"> 561</span>  }</div><div class="line"><a name="l00562"></a><span class="lineno"> 562</span>  }</div><div class="line"><a name="l00563"></a><span class="lineno"> 563</span>  }</div><div class="line"><a name="l00564"></a><span class="lineno"> 564</span> </div><div class="line"><a name="l00573"></a><span class="lineno"> 573</span>  <span class="keyword">template</span><<span class="keyword">typename</span> Component></div><div class="line"><a name="l00574"></a><span class="lineno"><a class="line" href="classentt_1_1Registry.html#a613333e0a4acb227d08938ccc594e064"> 574</a></span>  <span class="keywordtype">void</span> <a class="code" href="classentt_1_1Registry.html#a613333e0a4acb227d08938ccc594e064">reset</a>() {</div><div class="line"><a name="l00575"></a><span class="lineno"> 575</span>  <span class="keywordflow">if</span>(managed<Component>()) {</div><div class="line"><a name="l00576"></a><span class="lineno"> 576</span>  <span class="keyword">auto</span> &cpool = pool<Component>();</div><div class="line"><a name="l00577"></a><span class="lineno"> 577</span> </div><div class="line"><a name="l00578"></a><span class="lineno"> 578</span>  <span class="keywordflow">for</span>(<span class="keyword">auto</span> entity: entities) {</div><div class="line"><a name="l00579"></a><span class="lineno"> 579</span>  <span class="keywordflow">if</span>(cpool.has(entity)) {</div><div class="line"><a name="l00580"></a><span class="lineno"> 580</span>  cpool.destroy(entity);</div><div class="line"><a name="l00581"></a><span class="lineno"> 581</span>  }</div><div class="line"><a name="l00582"></a><span class="lineno"> 582</span>  }</div><div class="line"><a name="l00583"></a><span class="lineno"> 583</span>  }</div><div class="line"><a name="l00584"></a><span class="lineno"> 584</span>  }</div><div class="line"><a name="l00585"></a><span class="lineno"> 585</span> </div><div class="line"><a name="l00594"></a><span class="lineno"><a class="line" href="classentt_1_1Registry.html#a1b6ec743e9a62389cf2bba9a25ee09d7"> 594</a></span>  <span class="keywordtype">void</span> <a class="code" href="classentt_1_1Registry.html#a1b6ec743e9a62389cf2bba9a25ee09d7">reset</a>() {</div><div class="line"><a name="l00595"></a><span class="lineno"> 595</span>  available.clear();</div><div class="line"><a name="l00596"></a><span class="lineno"> 596</span>  pools.clear();</div><div class="line"><a name="l00597"></a><span class="lineno"> 597</span> </div><div class="line"><a name="l00598"></a><span class="lineno"> 598</span>  <span class="keywordflow">for</span>(<span class="keyword">auto</span> &&entity: entities) {</div><div class="line"><a name="l00599"></a><span class="lineno"> 599</span>  <span class="keyword">const</span> <span class="keyword">auto</span> <a class="code" href="classentt_1_1Registry.html#a773c2bb361f4e83aae1349ccfeede56b">version</a> = 1 + ((entity >> traits_type::version_shift) & traits_type::version_mask);</div><div class="line"><a name="l00600"></a><span class="lineno"> 600</span>  entity = (entity & traits_type::entity_mask) | (<a class="code" href="classentt_1_1Registry.html#a773c2bb361f4e83aae1349ccfeede56b">version</a> << traits_type::version_shift);</div><div class="line"><a name="l00601"></a><span class="lineno"> 601</span>  available.push_back(entity);</div><div class="line"><a name="l00602"></a><span class="lineno"> 602</span>  }</div><div class="line"><a name="l00603"></a><span class="lineno"> 603</span>  }</div><div class="line"><a name="l00604"></a><span class="lineno"> 604</span> </div><div class="line"><a name="l00636"></a><span class="lineno"> 636</span>  <span class="keyword">template</span><<span class="keyword">typename</span>... Component></div><div class="line"><a name="l00637"></a><span class="lineno"><a class="line" href="classentt_1_1Registry.html#aed83d4c8f80ae647ee73f2a8440fa09d"> 637</a></span>  <a class="code" href="classentt_1_1View.html">View</a><Entity, Component...> <a class="code" href="classentt_1_1Registry.html#aed83d4c8f80ae647ee73f2a8440fa09d">view</a>() {</div><div class="line"><a name="l00638"></a><span class="lineno"> 638</span>  <span class="keywordflow">return</span> <a class="code" href="classentt_1_1View.html">View</a><Entity, Component...>{ensure<Component>()...};</div><div class="line"><a name="l00639"></a><span class="lineno"> 639</span>  }</div><div class="line"><a name="l00640"></a><span class="lineno"> 640</span> </div><div class="line"><a name="l00657"></a><span class="lineno"> 657</span>  <span class="keyword">template</span><<span class="keyword">typename</span>... Component></div><div class="line"><a name="l00658"></a><span class="lineno"><a class="line" href="classentt_1_1Registry.html#ac05c9ccc5fe57df386d8104578fc9675"> 658</a></span>  <span class="keywordtype">void</span> <a class="code" href="classentt_1_1Registry.html#ac05c9ccc5fe57df386d8104578fc9675">prepare</a>() {</div><div class="line"><a name="l00659"></a><span class="lineno"> 659</span>  static_assert(<span class="keyword">sizeof</span>...(Component) > 1, <span class="stringliteral">"!"</span>);</div><div class="line"><a name="l00660"></a><span class="lineno"> 660</span>  <span class="keyword">const</span> <span class="keyword">auto</span> vtype = <a class="code" href="classentt_1_1Family.html#a221d31326ada546b679633235ef9494c">view_family::type</a><Component...>();</div><div class="line"><a name="l00661"></a><span class="lineno"> 661</span> </div><div class="line"><a name="l00662"></a><span class="lineno"> 662</span>  <span class="keywordflow">if</span>(!(vtype < handlers.size())) {</div><div class="line"><a name="l00663"></a><span class="lineno"> 663</span>  handlers.resize(vtype + 1);</div><div class="line"><a name="l00664"></a><span class="lineno"> 664</span>  }</div><div class="line"><a name="l00665"></a><span class="lineno"> 665</span> </div><div class="line"><a name="l00666"></a><span class="lineno"> 666</span>  <span class="keywordflow">if</span>(!handlers[vtype]) {</div><div class="line"><a name="l00667"></a><span class="lineno"> 667</span>  <span class="keyword">using</span> accumulator_type = <span class="keywordtype">int</span>[];</div><div class="line"><a name="l00668"></a><span class="lineno"> 668</span> </div><div class="line"><a name="l00669"></a><span class="lineno"> 669</span>  <span class="keyword">auto</span> handler = std::make_unique<SparseSet<Entity>>();</div><div class="line"><a name="l00670"></a><span class="lineno"> 670</span> </div><div class="line"><a name="l00671"></a><span class="lineno"> 671</span>  <span class="keywordflow">for</span>(<span class="keyword">auto</span> entity: view<Component...>()) {</div><div class="line"><a name="l00672"></a><span class="lineno"> 672</span>  handler->construct(entity);</div><div class="line"><a name="l00673"></a><span class="lineno"> 673</span>  }</div><div class="line"><a name="l00674"></a><span class="lineno"> 674</span> </div><div class="line"><a name="l00675"></a><span class="lineno"> 675</span>  accumulator_type accumulator = {</div><div class="line"><a name="l00676"></a><span class="lineno"> 676</span>  (ensure<Component>().append(*handler, &Registry::has<Component...>), 0)...</div><div class="line"><a name="l00677"></a><span class="lineno"> 677</span>  };</div><div class="line"><a name="l00678"></a><span class="lineno"> 678</span> </div><div class="line"><a name="l00679"></a><span class="lineno"> 679</span>  handlers[vtype] = std::move(handler);</div><div class="line"><a name="l00680"></a><span class="lineno"> 680</span>  (void)accumulator;</div><div class="line"><a name="l00681"></a><span class="lineno"> 681</span>  }</div><div class="line"><a name="l00682"></a><span class="lineno"> 682</span>  }</div><div class="line"><a name="l00683"></a><span class="lineno"> 683</span> </div><div class="line"><a name="l00720"></a><span class="lineno"> 720</span>  <span class="keyword">template</span><<span class="keyword">typename</span>... Component></div><div class="line"><a name="l00721"></a><span class="lineno"><a class="line" href="classentt_1_1Registry.html#a139a4d7b711fc1813c6c4520b9e79c09"> 721</a></span>  <a class="code" href="classentt_1_1PersistentView.html">PersistentView</a><Entity, Component...> <a class="code" href="classentt_1_1Registry.html#a139a4d7b711fc1813c6c4520b9e79c09">persistent</a>() {</div><div class="line"><a name="l00722"></a><span class="lineno"> 722</span>  static_assert(<span class="keyword">sizeof</span>...(Component) > 1, <span class="stringliteral">"!"</span>);</div><div class="line"><a name="l00723"></a><span class="lineno"> 723</span>  <a class="code" href="classentt_1_1Registry.html#ac05c9ccc5fe57df386d8104578fc9675">prepare</a><Component...>();</div><div class="line"><a name="l00724"></a><span class="lineno"> 724</span>  <span class="keywordflow">return</span> <a class="code" href="classentt_1_1PersistentView.html">PersistentView</a><Entity, Component...>{*handlers[<a class="code" href="classentt_1_1Family.html#a221d31326ada546b679633235ef9494c">view_family::type</a><Component...>()], ensure<Component>()...};</div><div class="line"><a name="l00725"></a><span class="lineno"> 725</span>  }</div><div class="line"><a name="l00726"></a><span class="lineno"> 726</span> </div><div class="line"><a name="l00727"></a><span class="lineno"> 727</span> <span class="keyword">private</span>:</div><div class="line"><a name="l00728"></a><span class="lineno"> 728</span>  std::vector<std::unique_ptr<SparseSet<Entity>>> handlers;</div><div class="line"><a name="l00729"></a><span class="lineno"> 729</span>  std::vector<std::unique_ptr<SparseSet<Entity>>> pools;</div><div class="line"><a name="l00730"></a><span class="lineno"> 730</span>  std::vector<entity_type> available;</div><div class="line"><a name="l00731"></a><span class="lineno"> 731</span>  std::vector<entity_type> entities;</div><div class="line"><a name="l00732"></a><span class="lineno"> 732</span> };</div><div class="line"><a name="l00733"></a><span class="lineno"> 733</span> </div><div class="line"><a name="l00734"></a><span class="lineno"> 734</span> </div><div class="line"><a name="l00741"></a><span class="lineno"><a class="line" href="namespaceentt.html#aa56ef01a9c62f21d68dd60f005296b23"> 741</a></span> <span class="keyword">using</span> <a class="code" href="classentt_1_1Registry.html">DefaultRegistry</a> = <a class="code" href="classentt_1_1Registry.html">Registry<std::uint32_t></a>;</div><div class="line"><a name="l00742"></a><span class="lineno"> 742</span> </div><div class="line"><a name="l00743"></a><span class="lineno"> 743</span> </div><div class="line"><a name="l00744"></a><span class="lineno"> 744</span> }</div><div class="line"><a name="l00745"></a><span class="lineno"> 745</span> </div><div class="line"><a name="l00746"></a><span class="lineno"> 746</span> </div><div class="line"><a name="l00747"></a><span class="lineno"> 747</span> <span class="preprocessor">#endif // ENTT_ENTITY_REGISTRY_HPP</span></div><div class="ttc" id="classentt_1_1Registry_html_a139a4d7b711fc1813c6c4520b9e79c09"><div class="ttname"><a href="classentt_1_1Registry.html#a139a4d7b711fc1813c6c4520b9e79c09">entt::Registry::persistent</a></div><div class="ttdeci">PersistentView< Entity, Component... > persistent()</div><div class="ttdoc">Returns a persistent view for the given components. </div><div class="ttdef"><b>Definition:</b> <a href="registry_8hpp_source.html#l00721">registry.hpp:721</a></div></div>
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<div class="ttc" id="classentt_1_1Registry_html_aa6b578d40a9305869e692167fc3dcddf"><div class="ttname"><a href="classentt_1_1Registry.html#aa6b578d40a9305869e692167fc3dcddf">entt::Registry::assign</a></div><div class="ttdeci">Component & assign(entity_type entity, Args &&... args)</div><div class="ttdoc">Assigns the given component to the given entity. </div><div class="ttdef"><b>Definition:</b> <a href="registry_8hpp_source.html#l00320">registry.hpp:320</a></div></div>
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<div class="ttc" id="classentt_1_1Registry_html_a613333e0a4acb227d08938ccc594e064"><div class="ttname"><a href="classentt_1_1Registry.html#a613333e0a4acb227d08938ccc594e064">entt::Registry::reset</a></div><div class="ttdeci">void reset()</div><div class="ttdoc">Resets the pool of the given component. </div><div class="ttdef"><b>Definition:</b> <a href="registry_8hpp_source.html#l00574">registry.hpp:574</a></div></div>
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<div class="ttc" id="classentt_1_1Registry_html"><div class="ttname"><a href="classentt_1_1Registry.html">entt::Registry</a></div><div class="ttdoc">A repository class for entities and components. </div><div class="ttdef"><b>Definition:</b> <a href="registry_8hpp_source.html#l00030">registry.hpp:30</a></div></div>
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<div class="ttc" id="classentt_1_1Registry_html_a625ada828ff48c153c7be14cc99eeca5"><div class="ttname"><a href="classentt_1_1Registry.html#a625ada828ff48c153c7be14cc99eeca5">entt::Registry::sort</a></div><div class="ttdeci">void sort(Compare compare)</div><div class="ttdoc">Sorts the pool of the given component. </div><div class="ttdef"><b>Definition:</b> <a href="registry_8hpp_source.html#l00495">registry.hpp:495</a></div></div>
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<div class="ttc" id="classentt_1_1Registry_html_a5ce71508e824ea5ef0d95d4baef37503"><div class="ttname"><a href="classentt_1_1Registry.html#a5ce71508e824ea5ef0d95d4baef37503">entt::Registry::replace</a></div><div class="ttdeci">Component & replace(entity_type entity, Args &&... args)</div><div class="ttdoc">Replaces the given component for the given entity. </div><div class="ttdef"><b>Definition:</b> <a href="registry_8hpp_source.html#l00427">registry.hpp:427</a></div></div>
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<div class="ttc" id="classentt_1_1Registry_html_a16f0e2c46c7f95ce9f16561bbeb6c52c"><div class="ttname"><a href="classentt_1_1Registry.html#a16f0e2c46c7f95ce9f16561bbeb6c52c">entt::Registry::size</a></div><div class="ttdeci">size_type size() const noexcept</div><div class="ttdoc">Returns the number of existing components of the given type. </div><div class="ttdef"><b>Definition:</b> <a href="registry_8hpp_source.html#l00134">registry.hpp:134</a></div></div>
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<div class="ttc" id="classentt_1_1Registry_html_ac05c9ccc5fe57df386d8104578fc9675"><div class="ttname"><a href="classentt_1_1Registry.html#ac05c9ccc5fe57df386d8104578fc9675">entt::Registry::prepare</a></div><div class="ttdeci">void prepare()</div><div class="ttdoc">Prepares the internal data structures used by persistent views. </div><div class="ttdef"><b>Definition:</b> <a href="registry_8hpp_source.html#l00658">registry.hpp:658</a></div></div>
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<div class="ttc" id="classentt_1_1Family_html_a221d31326ada546b679633235ef9494c"><div class="ttname"><a href="classentt_1_1Family.html#a221d31326ada546b679633235ef9494c">entt::Family::type</a></div><div class="ttdeci">static std::size_t type() noexcept</div><div class="ttdoc">Returns an unique identifier for the given type. </div><div class="ttdef"><b>Definition:</b> <a href="family_8hpp_source.html#l00033">family.hpp:33</a></div></div>
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<div class="ttc" id="namespaceentt_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="family_8hpp_source.html#l00010">family.hpp:10</a></div></div>
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<div class="ttc" id="classentt_1_1Registry_html_a11a759638bf2c28ac1670c7b533ca53f"><div class="ttname"><a href="classentt_1_1Registry.html#a11a759638bf2c28ac1670c7b533ca53f">entt::Registry::valid</a></div><div class="ttdeci">bool valid(entity_type entity) const noexcept</div><div class="ttdoc">Verifies if the entity identifier still refers to a valid entity. </div><div class="ttdef"><b>Definition:</b> <a href="registry_8hpp_source.html#l00178">registry.hpp:178</a></div></div>
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<div class="ttc" id="classentt_1_1Registry_html_ace82d0e0181bf0872174e1774d729db4"><div class="ttname"><a href="classentt_1_1Registry.html#ace82d0e0181bf0872174e1774d729db4">entt::Registry::has</a></div><div class="ttdeci">bool has(entity_type entity) const noexcept</div><div class="ttdoc">Checks if the given entity has all the given components. </div><div class="ttdef"><b>Definition:</b> <a href="registry_8hpp_source.html#l00357">registry.hpp:357</a></div></div>
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<div class="ttc" id="classentt_1_1Registry_html_ab5022bf3ac71d209cb9b85e686324f28"><div class="ttname"><a href="classentt_1_1Registry.html#ab5022bf3ac71d209cb9b85e686324f28">entt::Registry::Registry</a></div><div class="ttdeci">Registry()=default</div><div class="ttdoc">Default constructor, explicit on purpose. </div></div>
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<div class="ttc" id="classentt_1_1SparseSet_html"><div class="ttname"><a href="classentt_1_1SparseSet.html">entt::SparseSet</a></div><div class="ttdoc">Sparse set. </div><div class="ttdef"><b>Definition:</b> <a href="sparse__set_8hpp_source.html#l00023">sparse_set.hpp:23</a></div></div>
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<div class="ttc" id="classentt_1_1Registry_html_ae3c9cd27360a869f1e192d159447b5e4"><div class="ttname"><a href="classentt_1_1Registry.html#ae3c9cd27360a869f1e192d159447b5e4">entt::Registry::create</a></div><div class="ttdeci">entity_type create() noexcept</div><div class="ttdoc">Returns a new entity to which the given components are assigned. </div><div class="ttdef"><b>Definition:</b> <a href="registry_8hpp_source.html#l00231">registry.hpp:231</a></div></div>
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<div class="ttc" id="classentt_1_1Registry_html_a4e1a07f4170764925864b162277485b6"><div class="ttname"><a href="classentt_1_1Registry.html#a4e1a07f4170764925864b162277485b6">entt::Registry::current</a></div><div class="ttdeci">version_type current(entity_type entity) const noexcept</div><div class="ttdoc">Returns the actual version for the given entity identifier. </div><div class="ttdef"><b>Definition:</b> <a href="registry_8hpp_source.html#l00209">registry.hpp:209</a></div></div>
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<div class="ttc" id="classentt_1_1Registry_html_a82c8996277034df5e72b5f30a70ebb2d"><div class="ttname"><a href="classentt_1_1Registry.html#a82c8996277034df5e72b5f30a70ebb2d">entt::Registry::version_type</a></div><div class="ttdeci">typename traits_type::version_type version_type</div><div class="ttdoc">Underlying version type. </div><div class="ttdef"><b>Definition:</b> <a href="registry_8hpp_source.html#l00109">registry.hpp:109</a></div></div>
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<div class="ttc" id="classentt_1_1Registry_html_ae58d20711dabcd4959a89e0928974136"><div class="ttname"><a href="classentt_1_1Registry.html#ae58d20711dabcd4959a89e0928974136">entt::Registry::reset</a></div><div class="ttdeci">void reset(entity_type entity)</div><div class="ttdoc">Resets the given component for the given entity. </div><div class="ttdef"><b>Definition:</b> <a href="registry_8hpp_source.html#l00553">registry.hpp:553</a></div></div>
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<div class="ttc" id="classentt_1_1Registry_html_a1b6ec743e9a62389cf2bba9a25ee09d7"><div class="ttname"><a href="classentt_1_1Registry.html#a1b6ec743e9a62389cf2bba9a25ee09d7">entt::Registry::reset</a></div><div class="ttdeci">void reset()</div><div class="ttdoc">Resets the whole registry. </div><div class="ttdef"><b>Definition:</b> <a href="registry_8hpp_source.html#l00594">registry.hpp:594</a></div></div>
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<div class="ttc" id="classentt_1_1SparseSet_3_01Entity_01_4_html"><div class="ttname"><a href="classentt_1_1SparseSet_3_01Entity_01_4.html">entt::SparseSet< Entity ></a></div><div class="ttdoc">Basic sparse set implementation. </div><div class="ttdef"><b>Definition:</b> <a href="sparse__set_8hpp_source.html#l00054">sparse_set.hpp:54</a></div></div>
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<div class="ttc" id="classentt_1_1Registry_html_afccc9bc4af28b679d761f365655e1d42"><div class="ttname"><a href="classentt_1_1Registry.html#afccc9bc4af28b679d761f365655e1d42">entt::Registry::empty</a></div><div class="ttdeci">bool empty() const noexcept</div><div class="ttdoc">Checks whether the pool for the given component is empty. </div><div class="ttdef"><b>Definition:</b> <a href="registry_8hpp_source.html#l00161">registry.hpp:161</a></div></div>
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<div class="ttc" id="classentt_1_1Registry_html_a82cdceea5721c9b227cdef6d69020047"><div class="ttname"><a href="classentt_1_1Registry.html#a82cdceea5721c9b227cdef6d69020047">entt::Registry::~Registry</a></div><div class="ttdeci">~Registry()=default</div><div class="ttdoc">Default destructor. </div></div>
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<div class="ttc" id="classentt_1_1Registry_html_aed83d4c8f80ae647ee73f2a8440fa09d"><div class="ttname"><a href="classentt_1_1Registry.html#aed83d4c8f80ae647ee73f2a8440fa09d">entt::Registry::view</a></div><div class="ttdeci">View< Entity, Component... > view()</div><div class="ttdoc">Returns a standard view for the given components. </div><div class="ttdef"><b>Definition:</b> <a href="registry_8hpp_source.html#l00637">registry.hpp:637</a></div></div>
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<div class="ttc" id="classentt_1_1Registry_html_a6ff250745f1774984a9524d63855f26d"><div class="ttname"><a href="classentt_1_1Registry.html#a6ff250745f1774984a9524d63855f26d">entt::Registry::operator=</a></div><div class="ttdeci">Registry & operator=(const Registry &)=delete</div><div class="ttdoc">Copying a sparse set isn&#39;t allowed. </div></div>
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<div class="ttc" id="classentt_1_1Registry_html_a741ffda6e06838c5593ba97adc7658e2"><div class="ttname"><a href="classentt_1_1Registry.html#a741ffda6e06838c5593ba97adc7658e2">entt::Registry::size_type</a></div><div class="ttdeci">std::size_t size_type</div><div class="ttdoc">Unsigned integer type. </div><div class="ttdef"><b>Definition:</b> <a href="registry_8hpp_source.html#l00111">registry.hpp:111</a></div></div>
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<div class="ttc" id="classentt_1_1Registry_html_aa3abb830a7ba342266b62ff1a2965754"><div class="ttname"><a href="classentt_1_1Registry.html#aa3abb830a7ba342266b62ff1a2965754">entt::Registry::sort</a></div><div class="ttdeci">void sort()</div><div class="ttdoc">Sorts two pools of components in the same way. </div><div class="ttdef"><b>Definition:</b> <a href="registry_8hpp_source.html#l00534">registry.hpp:534</a></div></div>
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<div class="ttc" id="classentt_1_1Registry_html_afe1fc933ce101207a49b6bdeafa2ce41"><div class="ttname"><a href="classentt_1_1Registry.html#afe1fc933ce101207a49b6bdeafa2ce41">entt::Registry::destroy</a></div><div class="ttdeci">void destroy(entity_type entity)</div><div class="ttdoc">Destroys an entity and lets the registry recycle the identifier. </div><div class="ttdef"><b>Definition:</b> <a href="registry_8hpp_source.html#l00283">registry.hpp:283</a></div></div>
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<div class="ttc" id="classentt_1_1Registry_html_ad434a1920dd2c6a9a31ab482e2f29038"><div class="ttname"><a href="classentt_1_1Registry.html#ad434a1920dd2c6a9a31ab482e2f29038">entt::Registry::entity_type</a></div><div class="ttdeci">typename traits_type::entity_type entity_type</div><div class="ttdoc">Underlying entity identifier. </div><div class="ttdef"><b>Definition:</b> <a href="registry_8hpp_source.html#l00107">registry.hpp:107</a></div></div>
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<div class="ttc" id="classentt_1_1Registry_html_a773c2bb361f4e83aae1349ccfeede56b"><div class="ttname"><a href="classentt_1_1Registry.html#a773c2bb361f4e83aae1349ccfeede56b">entt::Registry::version</a></div><div class="ttdeci">version_type version(entity_type entity) const noexcept</div><div class="ttdoc">Returns the version stored along with the given entity identifier. </div><div class="ttdef"><b>Definition:</b> <a href="registry_8hpp_source.html#l00188">registry.hpp:188</a></div></div>
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<div class="ttc" id="classentt_1_1View_html"><div class="ttname"><a href="classentt_1_1View.html">entt::View</a></div><div class="ttdoc">Multi component view. </div><div class="ttdef"><b>Definition:</b> <a href="view_8hpp_source.html#l00255">view.hpp:255</a></div></div>
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<div class="ttc" id="classentt_1_1PersistentView_html"><div class="ttname"><a href="classentt_1_1PersistentView.html">entt::PersistentView</a></div><div class="ttdoc">Persistent view. </div><div class="ttdef"><b>Definition:</b> <a href="view_8hpp_source.html#l00052">view.hpp:52</a></div></div>
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<div class="ttc" id="classentt_1_1Registry_html_a75ed5006f4be9ea8489a48ef40247e29"><div class="ttname"><a href="classentt_1_1Registry.html#a75ed5006f4be9ea8489a48ef40247e29">entt::Registry::empty</a></div><div class="ttdeci">bool empty() const noexcept</div><div class="ttdoc">Checks if there exists at least an entity still in use. </div><div class="ttdef"><b>Definition:</b> <a href="registry_8hpp_source.html#l00169">registry.hpp:169</a></div></div>
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<div class="ttc" id="classentt_1_1Registry_html_a14524dac71cf528fcdccd74cdf230627"><div class="ttname"><a href="classentt_1_1Registry.html#a14524dac71cf528fcdccd74cdf230627">entt::Registry::accomodate</a></div><div class="ttdeci">Component & accomodate(entity_type entity, Args &&... args)</div><div class="ttdoc">Assigns or replaces the given component to the given entity. </div><div class="ttdef"><b>Definition:</b> <a href="registry_8hpp_source.html#l00460">registry.hpp:460</a></div></div>
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<div class="ttc" id="classentt_1_1Registry_html_ae1d9f447dfda4794f8d364965eab6586"><div class="ttname"><a href="classentt_1_1Registry.html#ae1d9f447dfda4794f8d364965eab6586">entt::Registry::create</a></div><div class="ttdeci">entity_type create() noexcept</div><div class="ttdoc">Creates a new entity and returns it. </div><div class="ttdef"><b>Definition:</b> <a href="registry_8hpp_source.html#l00253">registry.hpp:253</a></div></div>
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<div class="ttc" id="classentt_1_1Registry_html_af51d1553722e555eb1557fc0c68f104a"><div class="ttname"><a href="classentt_1_1Registry.html#af51d1553722e555eb1557fc0c68f104a">entt::Registry::capacity</a></div><div class="ttdeci">size_type capacity() const noexcept</div><div class="ttdoc">Returns the number of entities ever created. </div><div class="ttdef"><b>Definition:</b> <a href="registry_8hpp_source.html#l00150">registry.hpp:150</a></div></div>
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<div class="ttc" id="classentt_1_1Family_html"><div class="ttname"><a href="classentt_1_1Family.html">entt::Family</a></div><div class="ttdoc">Dynamic identifier generator. </div><div class="ttdef"><b>Definition:</b> <a href="family_8hpp_source.html#l00021">family.hpp:21</a></div></div>
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<div class="ttc" id="classentt_1_1Registry_html_a19f832202e918acd5e3708c1c7f33951"><div class="ttname"><a href="classentt_1_1Registry.html#a19f832202e918acd5e3708c1c7f33951">entt::Registry::size</a></div><div class="ttdeci">size_type size() const noexcept</div><div class="ttdoc">Returns the number of entities still in use. </div><div class="ttdef"><b>Definition:</b> <a href="registry_8hpp_source.html#l00142">registry.hpp:142</a></div></div>
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<div class="ttc" id="structentt_1_1entt__traits_html"><div class="ttname"><a href="structentt_1_1entt__traits.html">entt::entt_traits</a></div><div class="ttdoc">Entity traits. </div><div class="ttdef"><b>Definition:</b> <a href="traits_8hpp_source.html#l00018">traits.hpp:18</a></div></div>
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