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 <span id="projectnumber">3.2.0</span>
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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_e3a7bb56c55e5c2286e2fe96e197d4f5.html">entity</a></li> </ul>
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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_OBSERVER_HPP</span></div><div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="preprocessor">#define ENTT_ENTITY_OBSERVER_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 <limits></span></div><div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="preprocessor">#include <cstddef></span></div><div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="preprocessor">#include <cstdint></span></div><div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="preprocessor">#include <utility></span></div><div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="preprocessor">#include <algorithm></span></div><div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="preprocessor">#include <type_traits></span></div><div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="preprocessor">#include "../config/config.h"</span></div><div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="preprocessor">#include "../core/type_traits.hpp"</span></div><div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="preprocessor">#include "registry.hpp"</span></div><div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="preprocessor">#include "storage.hpp"</span></div><div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="preprocessor">#include "entity.hpp"</span></div><div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="preprocessor">#include "fwd.hpp"</span></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="l00019"></a><span class="lineno"> 19</span> <span class="keyword">namespace </span><a class="code" href="namespaceentt.html">entt</a> {</div><div class="line"><a name="l00020"></a><span class="lineno"> 20</span> </div><div class="line"><a name="l00021"></a><span class="lineno"> 21</span> </div><div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="keyword">template</span><<span class="keyword">typename</span>...></div><div class="line"><a name="l00024"></a><span class="lineno"><a class="line" href="structentt_1_1matcher.html"> 24</a></span> <span class="keyword">struct </span><a class="code" href="structentt_1_1matcher.html">matcher</a> {};</div><div class="line"><a name="l00025"></a><span class="lineno"> 25</span> </div><div class="line"><a name="l00026"></a><span class="lineno"> 26</span> </div><div class="line"><a name="l00033"></a><span class="lineno"> 33</span> <span class="keyword">template</span><<span class="keyword">typename</span>...></div><div class="line"><a name="l00034"></a><span class="lineno"><a class="line" href="structentt_1_1basic__collector.html"> 34</a></span> <span class="keyword">struct </span><a class="code" href="structentt_1_1basic__collector.html">basic_collector</a>;</div><div class="line"><a name="l00035"></a><span class="lineno"> 35</span> </div><div class="line"><a name="l00036"></a><span class="lineno"> 36</span> </div><div class="line"><a name="l00045"></a><span class="lineno"> 45</span> <span class="keyword">template</span><></div><div class="line"><a name="l00046"></a><span class="lineno"><a class="line" href="structentt_1_1basic__collector_3_4.html"> 46</a></span> <span class="keyword">struct </span><a class="code" href="structentt_1_1basic__collector_3_4.html">basic_collector<></a> {</div><div class="line"><a name="l00053"></a><span class="lineno"> 53</span>  <span class="keyword">template</span><<span class="keyword">typename</span>... AllOf, <span class="keyword">typename</span>... NoneOf></div><div class="line"><a name="l00054"></a><span class="lineno"><a class="line" href="structentt_1_1basic__collector_3_4.html#a0d5a3c7d8d96f79585930f93939136f0"> 54</a></span>  <span class="keyword">static</span> constexpr <span class="keyword">auto</span> <a class="code" href="structentt_1_1basic__collector_3_4.html#a0d5a3c7d8d96f79585930f93939136f0">group</a>(<a class="code" href="structentt_1_1exclude__t.html">exclude_t<NoneOf...></a> = {}) ENTT_NOEXCEPT {</div><div class="line"><a name="l00055"></a><span class="lineno"> 55</span>  <span class="keywordflow">return</span> <a class="code" href="structentt_1_1basic__collector.html">basic_collector<matcher<type_list<></a>, <a class="code" href="structentt_1_1type__list.html">type_list<></a>, <a class="code" href="structentt_1_1type__list.html">type_list</a><NoneOf...>, AllOf...>>{};</div><div class="line"><a name="l00056"></a><span class="lineno"> 56</span>  }</div><div class="line"><a name="l00057"></a><span class="lineno"> 57</span> </div><div class="line"><a name="l00063"></a><span class="lineno"> 63</span>  <span class="keyword">template</span><<span class="keyword">typename</span> AnyOf></div><div class="line"><a name="l00064"></a><span class="lineno"><a class="line" href="structentt_1_1basic__collector_3_4.html#a634ac3a53ee686d7fb7121404b14c17e"> 64</a></span>  <span class="keyword">static</span> constexpr <span class="keyword">auto</span> <a class="code" href="structentt_1_1basic__collector_3_4.html#a634ac3a53ee686d7fb7121404b14c17e">replace</a>() ENTT_NOEXCEPT {</div><div class="line"><a name="l00065"></a><span class="lineno"> 65</span>  <span class="keywordflow">return</span> <a class="code" href="structentt_1_1basic__collector.html">basic_collector<matcher<type_list<></a>, <a class="code" href="structentt_1_1type__list.html">type_list<></a>, AnyOf>>{};</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> </div><div class="line"><a name="l00077"></a><span class="lineno"> 77</span> <span class="keyword">template</span><<span class="keyword">typename</span>... Reject, <span class="keyword">typename</span>... Require, <span class="keyword">typename</span>... Rule, <span class="keyword">typename</span>... Other></div><div class="line"><a name="l00078"></a><span class="lineno"><a class="line" href="structentt_1_1basic__collector_3_01matcher_3_01type__list_3_01Reject_8_8_8_01_4_00_01type__list_98a79514dcad34a82f321f0796064ffb.html"> 78</a></span> <span class="keyword">struct </span><a class="code" href="structentt_1_1basic__collector.html">basic_collector</a><<a class="code" href="structentt_1_1matcher.html">matcher</a><<a class="code" href="structentt_1_1type__list.html">type_list</a><Reject...>, <a class="code" href="structentt_1_1type__list.html">type_list</a><Require...>, Rule...>, Other...> {</div><div class="line"><a name="l00080"></a><span class="lineno"><a class="line" href="structentt_1_1basic__collector_3_01matcher_3_01type__list_3_01Reject_8_8_8_01_4_00_01type__list_98a79514dcad34a82f321f0796064ffb.html#ac7c32cf26795aa4fc08d21597c68bc3d"> 80</a></span>  <span class="keyword">using</span> <a class="code" href="structentt_1_1matcher.html">current_type</a> = <a class="code" href="structentt_1_1matcher.html">matcher</a><<a class="code" href="structentt_1_1type__list.html">type_list</a><Reject...>, <a class="code" href="structentt_1_1type__list.html">type_list</a><Require...>, Rule...>;</div><div class="line"><a name="l00081"></a><span class="lineno"> 81</span> </div><div class="line"><a name="l00088"></a><span class="lineno"> 88</span>  <span class="keyword">template</span><<span class="keyword">typename</span>... AllOf, <span class="keyword">typename</span>... NoneOf></div><div class="line"><a name="l00089"></a><span class="lineno"><a class="line" href="structentt_1_1basic__collector_3_01matcher_3_01type__list_3_01Reject_8_8_8_01_4_00_01type__list_98a79514dcad34a82f321f0796064ffb.html#aef9fec26165b69baf8c7593fcd93327c"> 89</a></span>  <span class="keyword">static</span> constexpr <span class="keyword">auto</span> <a class="code" href="structentt_1_1basic__collector_3_01matcher_3_01type__list_3_01Reject_8_8_8_01_4_00_01type__list_98a79514dcad34a82f321f0796064ffb.html#aef9fec26165b69baf8c7593fcd93327c">group</a>(<a class="code" href="structentt_1_1exclude__t.html">exclude_t<NoneOf...></a> = {}) ENTT_NOEXCEPT {</div><div class="line"><a name="l00090"></a><span class="lineno"> 90</span>  <span class="keywordflow">return</span> <a class="code" href="structentt_1_1basic__collector.html">basic_collector<matcher<type_list<></a>, <a class="code" href="structentt_1_1type__list.html">type_list<></a>, <a class="code" href="structentt_1_1type__list.html">type_list</a><NoneOf...>, AllOf...>, <a class="code" href="structentt_1_1matcher.html">current_type</a>, Other...>{};</div><div class="line"><a name="l00091"></a><span class="lineno"> 91</span>  }</div><div class="line"><a name="l00092"></a><span class="lineno"> 92</span> </div><div class="line"><a name="l00098"></a><span class="lineno"> 98</span>  <span class="keyword">template</span><<span class="keyword">typename</span> AnyOf></div><div class="line"><a name="l00099"></a><span class="lineno"><a class="line" href="structentt_1_1basic__collector_3_01matcher_3_01type__list_3_01Reject_8_8_8_01_4_00_01type__list_98a79514dcad34a82f321f0796064ffb.html#a29c88a0f4e74f7e93d7ae7d08326a5b5"> 99</a></span>  <span class="keyword">static</span> constexpr <span class="keyword">auto</span> <a class="code" href="structentt_1_1basic__collector_3_01matcher_3_01type__list_3_01Reject_8_8_8_01_4_00_01type__list_98a79514dcad34a82f321f0796064ffb.html#a29c88a0f4e74f7e93d7ae7d08326a5b5">replace</a>() ENTT_NOEXCEPT {</div><div class="line"><a name="l00100"></a><span class="lineno"> 100</span>  <span class="keywordflow">return</span> <a class="code" href="structentt_1_1basic__collector.html">basic_collector<matcher<type_list<></a>, <a class="code" href="structentt_1_1type__list.html">type_list<></a>, AnyOf>, <a class="code" href="structentt_1_1matcher.html">current_type</a>, Other...>{};</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> </div><div class="line"><a name="l00109"></a><span class="lineno"> 109</span>  <span class="keyword">template</span><<span class="keyword">typename</span>... AllOf, <span class="keyword">typename</span>... NoneOf></div><div class="line"><a name="l00110"></a><span class="lineno"><a class="line" href="structentt_1_1basic__collector_3_01matcher_3_01type__list_3_01Reject_8_8_8_01_4_00_01type__list_98a79514dcad34a82f321f0796064ffb.html#a96d7a22588a9f1f67ba805de1f027433"> 110</a></span>  <span class="keyword">static</span> constexpr <span class="keyword">auto</span> <a class="code" href="structentt_1_1basic__collector_3_01matcher_3_01type__list_3_01Reject_8_8_8_01_4_00_01type__list_98a79514dcad34a82f321f0796064ffb.html#a96d7a22588a9f1f67ba805de1f027433">where</a>(<a class="code" href="structentt_1_1exclude__t.html">exclude_t<NoneOf...></a> = {}) ENTT_NOEXCEPT {</div><div class="line"><a name="l00111"></a><span class="lineno"> 111</span>  <span class="keyword">using</span> extended_type = <a class="code" href="structentt_1_1matcher.html">matcher</a><<a class="code" href="structentt_1_1type__list.html">type_list</a><Reject..., NoneOf...>, <a class="code" href="structentt_1_1type__list.html">type_list</a><Require..., AllOf...>, Rule...>;</div><div class="line"><a name="l00112"></a><span class="lineno"> 112</span>  <span class="keywordflow">return</span> <a class="code" href="structentt_1_1basic__collector.html">basic_collector</a><extended_type, Other...>{};</div><div class="line"><a name="l00113"></a><span class="lineno"> 113</span>  }</div><div class="line"><a name="l00114"></a><span class="lineno"> 114</span> };</div><div class="line"><a name="l00115"></a><span class="lineno"> 115</span> </div><div class="line"><a name="l00116"></a><span class="lineno"> 116</span> </div><div class="line"><a name="l00118"></a><span class="lineno"><a class="line" href="namespaceentt.html#aea8b073b774362fe800d9cce3542927a"> 118</a></span> constexpr <a class="code" href="structentt_1_1basic__collector_3_4.html">basic_collector<></a> <a class="code" href="namespaceentt.html#aea8b073b774362fe800d9cce3542927a">collector</a>{};</div><div class="line"><a name="l00119"></a><span class="lineno"> 119</span> </div><div class="line"><a name="l00120"></a><span class="lineno"> 120</span> </div><div class="line"><a name="l00170"></a><span class="lineno"> 170</span> <span class="keyword">template</span><<span class="keyword">typename</span> Entity></div><div class="line"><a name="l00171"></a><span class="lineno"> 171</span> <span class="keyword">class </span><a class="code" href="classentt_1_1basic__observer.html">basic_observer</a> {</div><div class="line"><a name="l00172"></a><span class="lineno"> 172</span>  <span class="keyword">using</span> payload_type = std::uint32_t;</div><div class="line"><a name="l00173"></a><span class="lineno"> 173</span> </div><div class="line"><a name="l00174"></a><span class="lineno"> 174</span>  <span class="keyword">template</span><<span class="keyword">typename</span>></div><div class="line"><a name="l00175"></a><span class="lineno"> 175</span>  <span class="keyword">struct </span>matcher_handler;</div><div class="line"><a name="l00176"></a><span class="lineno"> 176</span> </div><div class="line"><a name="l00177"></a><span class="lineno"> 177</span>  <span class="keyword">template</span><<span class="keyword">typename</span>... Reject, <span class="keyword">typename</span>... Require, <span class="keyword">typename</span> AnyOf></div><div class="line"><a name="l00178"></a><span class="lineno"> 178</span>  <span class="keyword">struct </span>matcher_handler<matcher<type_list<Reject...>, type_list<Require...>, AnyOf>> {</div><div class="line"><a name="l00179"></a><span class="lineno"> 179</span>  <span class="keyword">template</span><std::<span class="keywordtype">size_t</span> Index></div><div class="line"><a name="l00180"></a><span class="lineno"> 180</span>  <span class="keyword">static</span> <span class="keywordtype">void</span> maybe_valid_if(<a class="code" href="classentt_1_1basic__observer.html">basic_observer</a> &obs, <span class="keyword">const</span> Entity <a class="code" href="namespaceentt.html">entt</a>, <span class="keyword">const</span> <a class="code" href="classentt_1_1basic__registry.html">basic_registry<Entity></a> &reg) {</div><div class="line"><a name="l00181"></a><span class="lineno"> 181</span>  <span class="keywordflow">if</span>(reg.template has<Require...>(entt) && !(reg.template has<Reject>(entt) || ...)) {</div><div class="line"><a name="l00182"></a><span class="lineno"> 182</span>  <span class="keyword">auto</span> *comp = obs.view.<a class="code" href="classentt_1_1basic__storage.html#aab7da23b603d6cc78e67b3509ad979fa">try_get</a>(entt);</div><div class="line"><a name="l00183"></a><span class="lineno"> 183</span>  (comp ? *comp : obs.view.<a class="code" href="classentt_1_1basic__storage.html#a4cf7d707b57b6dd63c4d7852a23b6f5e">construct</a>(entt)) |= (1 << Index);</div><div class="line"><a name="l00184"></a><span class="lineno"> 184</span>  }</div><div class="line"><a name="l00185"></a><span class="lineno"> 185</span>  }</div><div class="line"><a name="l00186"></a><span class="lineno"> 186</span> </div><div class="line"><a name="l00187"></a><span class="lineno"> 187</span>  <span class="keyword">template</span><std::<span class="keywordtype">size_t</span> Index></div><div class="line"><a name="l00188"></a><span class="lineno"> 188</span>  <span class="keyword">static</span> <span class="keywordtype">void</span> discard_if(<a class="code" href="classentt_1_1basic__observer.html">basic_observer</a> &obs, <span class="keyword">const</span> Entity entt) {</div><div class="line"><a name="l00189"></a><span class="lineno"> 189</span>  <span class="keywordflow">if</span>(<span class="keyword">auto</span> *value = obs.view.<a class="code" href="classentt_1_1basic__storage.html#aab7da23b603d6cc78e67b3509ad979fa">try_get</a>(entt); value && !(*value &= (~(1 << Index)))) {</div><div class="line"><a name="l00190"></a><span class="lineno"> 190</span>  obs.view.<a class="code" href="classentt_1_1basic__storage.html#ab59f0a70b5d25e66062e5ae5b501ab41">destroy</a>(entt);</div><div class="line"><a name="l00191"></a><span class="lineno"> 191</span>  }</div><div class="line"><a name="l00192"></a><span class="lineno"> 192</span>  }</div><div class="line"><a name="l00193"></a><span class="lineno"> 193</span> </div><div class="line"><a name="l00194"></a><span class="lineno"> 194</span>  <span class="keyword">template</span><std::<span class="keywordtype">size_t</span> Index></div><div class="line"><a name="l00195"></a><span class="lineno"> 195</span>  <span class="keyword">static</span> <span class="keywordtype">void</span> connect(<a class="code" href="classentt_1_1basic__observer.html">basic_observer</a> &obs, <a class="code" href="classentt_1_1basic__registry.html">basic_registry<Entity></a> &reg) {</div><div class="line"><a name="l00196"></a><span class="lineno"> 196</span>  (reg.template on_destroy<Require>().<span class="keyword">template</span> connect<&discard_if<Index>>(obs), ...);</div><div class="line"><a name="l00197"></a><span class="lineno"> 197</span>  (reg.template on_construct<Reject>().<span class="keyword">template</span> connect<&discard_if<Index>>(obs), ...);</div><div class="line"><a name="l00198"></a><span class="lineno"> 198</span>  reg.template on_replace<AnyOf>().<span class="keyword">template</span> connect<&maybe_valid_if<Index>>(obs);</div><div class="line"><a name="l00199"></a><span class="lineno"> 199</span>  reg.template on_destroy<AnyOf>().<span class="keyword">template</span> connect<&discard_if<Index>>(obs);</div><div class="line"><a name="l00200"></a><span class="lineno"> 200</span>  }</div><div class="line"><a name="l00201"></a><span class="lineno"> 201</span> </div><div class="line"><a name="l00202"></a><span class="lineno"> 202</span>  <span class="keyword">static</span> <span class="keywordtype">void</span> disconnect(<a class="code" href="classentt_1_1basic__observer.html">basic_observer</a> &obs, <a class="code" href="classentt_1_1basic__registry.html">basic_registry<Entity></a> &reg) {</div><div class="line"><a name="l00203"></a><span class="lineno"> 203</span>  (reg.template on_destroy<Require>().disconnect(obs), ...);</div><div class="line"><a name="l00204"></a><span class="lineno"> 204</span>  (reg.template on_construct<Reject>().disconnect(obs), ...);</div><div class="line"><a name="l00205"></a><span class="lineno"> 205</span>  reg.template on_replace<AnyOf>().disconnect(obs);</div><div class="line"><a name="l00206"></a><span class="lineno"> 206</span>  reg.template on_destroy<AnyOf>().disconnect(obs);</div><div class="line"><a name="l00207"></a><span class="lineno"> 207</span>  }</div><div class="line"><a name="l00208"></a><span class="lineno"> 208</span>  };</div><div class="line"><a name="l00209"></a><span class="lineno"> 209</span> </div><div class="line"><a name="l00210"></a><span class="lineno"> 210</span>  <span class="keyword">template</span><<span class="keyword">typename</span>... Reject, <span class="keyword">typename</span>... Require, <span class="keyword">typename</span>... NoneOf, <span class="keyword">typename</span>... AllOf></div><div class="line"><a name="l00211"></a><span class="lineno"> 211</span>  <span class="keyword">struct </span>matcher_handler<matcher<type_list<Reject...>, type_list<Require...>, type_list<NoneOf...>, AllOf...>> {</div><div class="line"><a name="l00212"></a><span class="lineno"> 212</span>  <span class="keyword">template</span><std::<span class="keywordtype">size_t</span> Index></div><div class="line"><a name="l00213"></a><span class="lineno"> 213</span>  <span class="keyword">static</span> <span class="keywordtype">void</span> maybe_valid_if(<a class="code" href="classentt_1_1basic__observer.html">basic_observer</a> &obs, <span class="keyword">const</span> Entity <a class="code" href="namespaceentt.html">entt</a>, <span class="keyword">const</span> <a class="code" href="classentt_1_1basic__registry.html">basic_registry<Entity></a> &reg) {</div><div class="line"><a name="l00214"></a><span class="lineno"> 214</span>  <span class="keywordflow">if</span>(reg.template has<AllOf...>(entt) && !(reg.template has<NoneOf>(entt) || ...)</div><div class="line"><a name="l00215"></a><span class="lineno"> 215</span>  && reg.template has<Require...>(entt) && !(reg.template has<Reject>(entt) || ...))</div><div class="line"><a name="l00216"></a><span class="lineno"> 216</span>  {</div><div class="line"><a name="l00217"></a><span class="lineno"> 217</span>  <span class="keyword">auto</span> *comp = obs.view.<a class="code" href="classentt_1_1basic__storage.html#aab7da23b603d6cc78e67b3509ad979fa">try_get</a>(entt);</div><div class="line"><a name="l00218"></a><span class="lineno"> 218</span>  (comp ? *comp : obs.view.<a class="code" href="classentt_1_1basic__storage.html#a4cf7d707b57b6dd63c4d7852a23b6f5e">construct</a>(entt)) |= (1 << Index);</div><div class="line"><a name="l00219"></a><span class="lineno"> 219</span>  }</div><div class="line"><a name="l00220"></a><span class="lineno"> 220</span>  }</div><div class="line"><a name="l00221"></a><span class="lineno"> 221</span> </div><div class="line"><a name="l00222"></a><span class="lineno"> 222</span>  <span class="keyword">template</span><std::<span class="keywordtype">size_t</span> Index></div><div class="line"><a name="l00223"></a><span class="lineno"> 223</span>  <span class="keyword">static</span> <span class="keywordtype">void</span> discard_if(<a class="code" href="classentt_1_1basic__observer.html">basic_observer</a> &obs, <span class="keyword">const</span> Entity entt) {</div><div class="line"><a name="l00224"></a><span class="lineno"> 224</span>  <span class="keywordflow">if</span>(<span class="keyword">auto</span> *value = obs.view.<a class="code" href="classentt_1_1basic__storage.html#aab7da23b603d6cc78e67b3509ad979fa">try_get</a>(entt); value && !(*value &= (~(1 << Index)))) {</div><div class="line"><a name="l00225"></a><span class="lineno"> 225</span>  obs.view.<a class="code" href="classentt_1_1basic__storage.html#ab59f0a70b5d25e66062e5ae5b501ab41">destroy</a>(entt);</div><div class="line"><a name="l00226"></a><span class="lineno"> 226</span>  }</div><div class="line"><a name="l00227"></a><span class="lineno"> 227</span>  }</div><div class="line"><a name="l00228"></a><span class="lineno"> 228</span> </div><div class="line"><a name="l00229"></a><span class="lineno"> 229</span>  <span class="keyword">template</span><std::<span class="keywordtype">size_t</span> Index></div><div class="line"><a name="l00230"></a><span class="lineno"> 230</span>  <span class="keyword">static</span> <span class="keywordtype">void</span> connect(<a class="code" href="classentt_1_1basic__observer.html">basic_observer</a> &obs, <a class="code" href="classentt_1_1basic__registry.html">basic_registry<Entity></a> &reg) {</div><div class="line"><a name="l00231"></a><span class="lineno"> 231</span>  (reg.template on_destroy<Require>().<span class="keyword">template</span> connect<&discard_if<Index>>(obs), ...);</div><div class="line"><a name="l00232"></a><span class="lineno"> 232</span>  (reg.template on_construct<Reject>().<span class="keyword">template</span> connect<&discard_if<Index>>(obs), ...);</div><div class="line"><a name="l00233"></a><span class="lineno"> 233</span>  (reg.template on_construct<AllOf>().<span class="keyword">template</span> connect<&maybe_valid_if<Index>>(obs), ...);</div><div class="line"><a name="l00234"></a><span class="lineno"> 234</span>  (reg.template on_destroy<NoneOf>().<span class="keyword">template</span> connect<&maybe_valid_if<Index>>(obs), ...);</div><div class="line"><a name="l00235"></a><span class="lineno"> 235</span>  (reg.template on_destroy<AllOf>().<span class="keyword">template</span> connect<&discard_if<Index>>(obs), ...);</div><div class="line"><a name="l00236"></a><span class="lineno"> 236</span>  (reg.template on_construct<NoneOf>().<span class="keyword">template</span> connect<&discard_if<Index>>(obs), ...);</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="l00239"></a><span class="lineno"> 239</span>  <span class="keyword">static</span> <span class="keywordtype">void</span> disconnect(<a class="code" href="classentt_1_1basic__observer.html">basic_observer</a> &obs, <a class="code" href="classentt_1_1basic__registry.html">basic_registry<Entity></a> &reg) {</div><div class="line"><a name="l00240"></a><span class="lineno"> 240</span>  (reg.template on_destroy<Require>().disconnect(obs), ...);</div><div class="line"><a name="l00241"></a><span class="lineno"> 241</span>  (reg.template on_construct<Reject>().disconnect(obs), ...);</div><div class="line"><a name="l00242"></a><span class="lineno"> 242</span>  (reg.template on_construct<AllOf>().disconnect(obs), ...);</div><div class="line"><a name="l00243"></a><span class="lineno"> 243</span>  (reg.template on_destroy<NoneOf>().disconnect(obs), ...);</div><div class="line"><a name="l00244"></a><span class="lineno"> 244</span>  (reg.template on_destroy<AllOf>().disconnect(obs), ...);</div><div class="line"><a name="l00245"></a><span class="lineno"> 245</span>  (reg.template on_construct<NoneOf>().disconnect(obs), ...);</div><div class="line"><a name="l00246"></a><span class="lineno"> 246</span>  }</div><div class="line"><a name="l00247"></a><span class="lineno"> 247</span>  };</div><div class="line"><a name="l00248"></a><span class="lineno"> 248</span> </div><div class="line"><a name="l00249"></a><span class="lineno"> 249</span>  <span class="keyword">template</span><<span class="keyword">typename</span>... Matcher></div><div class="line"><a name="l00250"></a><span class="lineno"> 250</span>  <span class="keyword">static</span> <span class="keywordtype">void</span> disconnect(<a class="code" href="classentt_1_1basic__observer.html">basic_observer</a> &obs, <a class="code" href="classentt_1_1basic__registry.html">basic_registry<Entity></a> &reg) {</div><div class="line"><a name="l00251"></a><span class="lineno"> 251</span>  (matcher_handler<Matcher>::disconnect(obs, reg), ...);</div><div class="line"><a name="l00252"></a><span class="lineno"> 252</span>  }</div><div class="line"><a name="l00253"></a><span class="lineno"> 253</span> </div><div class="line"><a name="l00254"></a><span class="lineno"> 254</span>  <span class="keyword">template</span><<span class="keyword">typename</span>... Matcher, std::size_t... Index></div><div class="line"><a name="l00255"></a><span class="lineno"> 255</span>  <span class="keywordtype">void</span> connect(<a class="code" href="classentt_1_1basic__registry.html">basic_registry<Entity></a> &reg, std::index_sequence<Index...>) {</div><div class="line"><a name="l00256"></a><span class="lineno"> 256</span>  static_assert(<span class="keyword">sizeof</span>...(Matcher) < std::numeric_limits<payload_type>::digits);</div><div class="line"><a name="l00257"></a><span class="lineno"> 257</span>  (matcher_handler<Matcher>::template connect<Index>(*<span class="keyword">this</span>, reg), ...);</div><div class="line"><a name="l00258"></a><span class="lineno"> 258</span>  release = &<a class="code" href="classentt_1_1basic__observer.html#a1337e8f885ca963383e5a3ed2a354955">basic_observer::disconnect</a><Matcher...>;</div><div class="line"><a name="l00259"></a><span class="lineno"> 259</span>  }</div><div class="line"><a name="l00260"></a><span class="lineno"> 260</span> </div><div class="line"><a name="l00261"></a><span class="lineno"> 261</span> <span class="keyword">public</span>:</div><div class="line"><a name="l00263"></a><span class="lineno"><a class="line" href="classentt_1_1basic__observer.html#af7a57f53ed7a6c835129480ff6594f7d"> 263</a></span>  <span class="keyword">using</span> <a class="code" href="classentt_1_1basic__observer.html#af7a57f53ed7a6c835129480ff6594f7d">entity_type</a> = Entity;</div><div class="line"><a name="l00265"></a><span class="lineno"><a class="line" href="classentt_1_1basic__observer.html#a147a0e35035fc3c19b67b31d66d2d80b"> 265</a></span>  <span class="keyword">using</span> <a class="code" href="classentt_1_1basic__observer.html#a147a0e35035fc3c19b67b31d66d2d80b">size_type</a> = std::size_t;</div><div class="line"><a name="l00267"></a><span class="lineno"><a class="line" href="classentt_1_1basic__observer.html#a7954b77084292847aa1c8da9f22d8443"> 267</a></span>  <span class="keyword">using</span> <a class="code" href="classentt_1_1basic__observer.html#a7954b77084292847aa1c8da9f22d8443">iterator_type</a> = <span class="keyword">typename</span> <a class="code" href="classentt_1_1sparse__set.html#a580b210d5a24c49ca8c255646f3bb469">sparse_set<Entity>::iterator_type</a>;</div><div class="line"><a name="l00268"></a><span class="lineno"> 268</span> </div><div class="line"><a name="l00270"></a><span class="lineno"><a class="line" href="classentt_1_1basic__observer.html#a31d9929b1c6d0b422ecbccff86803d3c"> 270</a></span>  <a class="code" href="classentt_1_1basic__observer.html#a31d9929b1c6d0b422ecbccff86803d3c">basic_observer</a>() ENTT_NOEXCEPT</div><div class="line"><a name="l00271"></a><span class="lineno"> 271</span>  : target{}, release{}, <a class="code" href="classentt_1_1basic__view.html">view</a>{}</div><div class="line"><a name="l00272"></a><span class="lineno"> 272</span>  {}</div><div class="line"><a name="l00273"></a><span class="lineno"> 273</span> </div><div class="line"><a name="l00275"></a><span class="lineno"> 275</span>  <a class="code" href="classentt_1_1basic__observer.html">basic_observer</a>(<span class="keyword">const</span> <a class="code" href="classentt_1_1basic__observer.html">basic_observer</a> &) = <span class="keyword">delete</span>;</div><div class="line"><a name="l00277"></a><span class="lineno"> 277</span>  <a class="code" href="classentt_1_1basic__observer.html">basic_observer</a>(<a class="code" href="classentt_1_1basic__observer.html">basic_observer</a> &&) = <span class="keyword">delete</span>;</div><div class="line"><a name="l00278"></a><span class="lineno"> 278</span> </div><div class="line"><a name="l00284"></a><span class="lineno"> 284</span>  <span class="keyword">template</span><<span class="keyword">typename</span>... Matcher></div><div class="line"><a name="l00285"></a><span class="lineno"><a class="line" href="classentt_1_1basic__observer.html#a2290c465994e6af15f1fe7b35541ffbd"> 285</a></span>  <a class="code" href="classentt_1_1basic__observer.html#a2290c465994e6af15f1fe7b35541ffbd">basic_observer</a>(<a class="code" href="classentt_1_1basic__registry.html">basic_registry<entity_type></a> &reg, <a class="code" href="structentt_1_1basic__collector.html">basic_collector<Matcher...></a>) ENTT_NOEXCEPT</div><div class="line"><a name="l00286"></a><span class="lineno"> 286</span>  : target{&reg},</div><div class="line"><a name="l00287"></a><span class="lineno"> 287</span>  release{},</div><div class="line"><a name="l00288"></a><span class="lineno"> 288</span>  <a class="code" href="classentt_1_1basic__view.html">view</a>{}</div><div class="line"><a name="l00289"></a><span class="lineno"> 289</span>  {</div><div class="line"><a name="l00290"></a><span class="lineno"> 290</span>  connect<Matcher...>(reg, std::index_sequence_for<Matcher...>{});</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> </div><div class="line"><a name="l00294"></a><span class="lineno"> 294</span>  ~<a class="code" href="classentt_1_1basic__observer.html">basic_observer</a>() = <span class="keywordflow">default</span>;</div><div class="line"><a name="l00295"></a><span class="lineno"> 295</span> </div><div class="line"><a name="l00300"></a><span class="lineno"> 300</span>  <a class="code" href="classentt_1_1basic__observer.html">basic_observer</a> & operator=(<span class="keyword">const</span> <a class="code" href="classentt_1_1basic__observer.html">basic_observer</a> &) = <span class="keyword">delete</span>;</div><div class="line"><a name="l00301"></a><span class="lineno"> 301</span> </div><div class="line"><a name="l00306"></a><span class="lineno"> 306</span>  <a class="code" href="classentt_1_1basic__observer.html">basic_observer</a> & operator=(<a class="code" href="classentt_1_1basic__observer.html">basic_observer</a> &&) = <span class="keyword">delete</span>;</div><div class="line"><a name="l00307"></a><span class="lineno"> 307</span> </div><div class="line"><a name="l00313"></a><span class="lineno"> 313</span>  <span class="keyword">template</span><<span class="keyword">typename</span>... Matcher></div><div class="line"><a name="l00314"></a><span class="lineno"><a class="line" href="classentt_1_1basic__observer.html#a7d69a8bc866b01cc677de492bc436209"> 314</a></span>  <span class="keywordtype">void</span> <a class="code" href="classentt_1_1basic__observer.html#a7d69a8bc866b01cc677de492bc436209">connect</a>(<a class="code" href="classentt_1_1basic__registry.html">basic_registry<entity_type></a> &reg, <a class="code" href="structentt_1_1basic__collector.html">basic_collector<Matcher...></a>) {</div><div class="line"><a name="l00315"></a><span class="lineno"> 315</span>  disconnect();</div><div class="line"><a name="l00316"></a><span class="lineno"> 316</span>  connect<Matcher...>(reg, std::index_sequence_for<Matcher...>{});</div><div class="line"><a name="l00317"></a><span class="lineno"> 317</span>  target = &reg;</div><div class="line"><a name="l00318"></a><span class="lineno"> 318</span>  <a class="code" href="classentt_1_1basic__view.html">view</a>.reset();</div><div class="line"><a name="l00319"></a><span class="lineno"> 319</span>  }</div><div class="line"><a name="l00320"></a><span class="lineno"> 320</span> </div><div class="line"><a name="l00322"></a><span class="lineno"><a class="line" href="classentt_1_1basic__observer.html#a1337e8f885ca963383e5a3ed2a354955"> 322</a></span>  <span class="keywordtype">void</span> <a class="code" href="classentt_1_1basic__observer.html#a1337e8f885ca963383e5a3ed2a354955">disconnect</a>() {</div><div class="line"><a name="l00323"></a><span class="lineno"> 323</span>  <span class="keywordflow">if</span>(release) {</div><div class="line"><a name="l00324"></a><span class="lineno"> 324</span>  release(*<span class="keyword">this</span>, *target);</div><div class="line"><a name="l00325"></a><span class="lineno"> 325</span>  release = <span class="keyword">nullptr</span>;</div><div class="line"><a name="l00326"></a><span class="lineno"> 326</span>  }</div><div class="line"><a name="l00327"></a><span class="lineno"> 327</span>  }</div><div class="line"><a name="l00328"></a><span class="lineno"> 328</span> </div><div class="line"><a name="l00333"></a><span class="lineno"><a class="line" href="classentt_1_1basic__observer.html#ab42aeb1e1ffb32b98bc4da4f30755ec1"> 333</a></span>  <a class="code" href="classentt_1_1basic__observer.html#a147a0e35035fc3c19b67b31d66d2d80b">size_type</a> <a class="code" href="classentt_1_1basic__observer.html#ab42aeb1e1ffb32b98bc4da4f30755ec1">size</a>() const ENTT_NOEXCEPT {</div><div class="line"><a name="l00334"></a><span class="lineno"> 334</span>  <span class="keywordflow">return</span> <a class="code" href="classentt_1_1basic__view.html">view</a>.size();</div><div class="line"><a name="l00335"></a><span class="lineno"> 335</span>  }</div><div class="line"><a name="l00336"></a><span class="lineno"> 336</span> </div><div class="line"><a name="l00341"></a><span class="lineno"><a class="line" href="classentt_1_1basic__observer.html#a0986b7af08f9b1bc70bd01b9bbe66cc4"> 341</a></span>  <span class="keywordtype">bool</span> <a class="code" href="classentt_1_1basic__observer.html#a0986b7af08f9b1bc70bd01b9bbe66cc4">empty</a>() const ENTT_NOEXCEPT {</div><div class="line"><a name="l00342"></a><span class="lineno"> 342</span>  <span class="keywordflow">return</span> <a class="code" href="classentt_1_1basic__view.html">view</a>.empty();</div><div class="line"><a name="l00343"></a><span class="lineno"> 343</span>  }</div><div class="line"><a name="l00344"></a><span class="lineno"> 344</span> </div><div class="line"><a name="l00357"></a><span class="lineno"><a class="line" href="classentt_1_1basic__observer.html#a435ebcce2d35f39b9f19ad84ffcdb4ea"> 357</a></span>  <span class="keyword">const</span> <a class="code" href="classentt_1_1basic__observer.html#af7a57f53ed7a6c835129480ff6594f7d">entity_type</a> * <a class="code" href="classentt_1_1basic__observer.html#a435ebcce2d35f39b9f19ad84ffcdb4ea">data</a>() const ENTT_NOEXCEPT {</div><div class="line"><a name="l00358"></a><span class="lineno"> 358</span>  <span class="keywordflow">return</span> <a class="code" href="classentt_1_1basic__view.html">view</a>.data();</div><div class="line"><a name="l00359"></a><span class="lineno"> 359</span>  }</div><div class="line"><a name="l00360"></a><span class="lineno"> 360</span> </div><div class="line"><a name="l00369"></a><span class="lineno"><a class="line" href="classentt_1_1basic__observer.html#a33bca86113be57e75ca1da80620763d1"> 369</a></span>  <a class="code" href="classentt_1_1basic__observer.html#a7954b77084292847aa1c8da9f22d8443">iterator_type</a> <a class="code" href="classentt_1_1basic__observer.html#a33bca86113be57e75ca1da80620763d1">begin</a>() const ENTT_NOEXCEPT {</div><div class="line"><a name="l00370"></a><span class="lineno"> 370</span>  <span class="keywordflow">return</span> <a class="code" href="classentt_1_1basic__view.html">view</a>.sparse_set<entity_type>::begin();</div><div class="line"><a name="l00371"></a><span class="lineno"> 371</span>  }</div><div class="line"><a name="l00372"></a><span class="lineno"> 372</span> </div><div class="line"><a name="l00383"></a><span class="lineno"><a class="line" href="classentt_1_1basic__observer.html#afe16c233c8795aa7341d61cf86c1d2d7"> 383</a></span>  <a class="code" href="classentt_1_1basic__observer.html#a7954b77084292847aa1c8da9f22d8443">iterator_type</a> <a class="code" href="classentt_1_1basic__observer.html#afe16c233c8795aa7341d61cf86c1d2d7">end</a>() const ENTT_NOEXCEPT {</div><div class="line"><a name="l00384"></a><span class="lineno"> 384</span>  <span class="keywordflow">return</span> <a class="code" href="classentt_1_1basic__view.html">view</a>.sparse_set<entity_type>::end();</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="l00388"></a><span class="lineno"><a class="line" href="classentt_1_1basic__observer.html#ade730cb09309ed7077616a908b25c2e7"> 388</a></span>  <span class="keywordtype">void</span> <a class="code" href="classentt_1_1basic__observer.html#ade730cb09309ed7077616a908b25c2e7">clear</a>() {</div><div class="line"><a name="l00389"></a><span class="lineno"> 389</span>  <a class="code" href="classentt_1_1basic__view.html">view</a>.reset();</div><div class="line"><a name="l00390"></a><span class="lineno"> 390</span>  }</div><div class="line"><a name="l00391"></a><span class="lineno"> 391</span> </div><div class="line"><a name="l00406"></a><span class="lineno"> 406</span>  <span class="keyword">template</span><<span class="keyword">typename</span> Func></div><div class="line"><a name="l00407"></a><span class="lineno"><a class="line" href="classentt_1_1basic__observer.html#a181a6724835a3a41e33610003f738525"> 407</a></span>  <span class="keywordtype">void</span> <a class="code" href="classentt_1_1basic__observer.html#a181a6724835a3a41e33610003f738525">each</a>(Func func)<span class="keyword"> const </span>{</div><div class="line"><a name="l00408"></a><span class="lineno"> 408</span>  static_assert(std::is_invocable_v<Func, entity_type>);</div><div class="line"><a name="l00409"></a><span class="lineno"> 409</span>  std::for_each(begin(), end(), std::move(func));</div><div class="line"><a name="l00410"></a><span class="lineno"> 410</span>  }</div><div class="line"><a name="l00411"></a><span class="lineno"> 411</span> </div><div class="line"><a name="l00426"></a><span class="lineno"> 426</span>  <span class="keyword">template</span><<span class="keyword">typename</span> Func></div><div class="line"><a name="l00427"></a><span class="lineno"><a class="line" href="classentt_1_1basic__observer.html#a535f3ddf32641a54e1c8861519933c97"> 427</a></span>  <span class="keywordtype">void</span> <a class="code" href="classentt_1_1basic__observer.html#a535f3ddf32641a54e1c8861519933c97">each</a>(Func func) {</div><div class="line"><a name="l00428"></a><span class="lineno"> 428</span>  std::as_const(*this).each(std::move(func));</div><div class="line"><a name="l00429"></a><span class="lineno"> 429</span>  clear();</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="l00432"></a><span class="lineno"> 432</span> <span class="keyword">private</span>:</div><div class="line"><a name="l00433"></a><span class="lineno"> 433</span>  <a class="code" href="classentt_1_1basic__registry.html">basic_registry<entity_type></a> *target;</div><div class="line"><a name="l00434"></a><span class="lineno"> 434</span>  void(* release)(<a class="code" href="classentt_1_1basic__observer.html">basic_observer</a> &, <a class="code" href="classentt_1_1basic__registry.html">basic_registry<entity_type></a> &);</div><div class="line"><a name="l00435"></a><span class="lineno"> 435</span>  <a class="code" href="structentt_1_1storage.html">storage<entity_type, payload_type></a> <a class="code" href="namespaceentt.html#af2118c00dea16193aee017d1408beb53">view</a>;</div><div class="line"><a name="l00436"></a><span class="lineno"> 436</span> };</div><div class="line"><a name="l00437"></a><span class="lineno"> 437</span> </div><div class="line"><a name="l00438"></a><span class="lineno"> 438</span> </div><div class="line"><a name="l00439"></a><span class="lineno"> 439</span> }</div><div class="line"><a name="l00440"></a><span class="lineno"> 440</span> </div><div class="line"><a name="l00441"></a><span class="lineno"> 441</span> </div><div class="line"><a name="l00442"></a><span class="lineno"> 442</span> <span class="preprocessor">#endif // ENTT_ENTITY_OBSERVER_HPP</span></div><div class="ttc" id="classentt_1_1basic__observer_html_a33bca86113be57e75ca1da80620763d1"><div class="ttname"><a href="classentt_1_1basic__observer.html#a33bca86113be57e75ca1da80620763d1">entt::basic_observer::begin</a></div><div class="ttdeci">iterator_type begin() const ENTT_NOEXCEPT</div><div class="ttdoc">Returns an iterator to the first entity of the observer. </div><div class="ttdef"><b>Definition:</b> <a href="observer_8hpp_source.html#l00369">observer.hpp:369</a></div></div>
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<div class="ttc" id="structentt_1_1basic__collector_3_01matcher_3_01type__list_3_01Reject_8_8_8_01_4_00_01type__list_98a79514dcad34a82f321f0796064ffb_html_aef9fec26165b69baf8c7593fcd93327c"><div class="ttname"><a href="structentt_1_1basic__collector_3_01matcher_3_01type__list_3_01Reject_8_8_8_01_4_00_01type__list_98a79514dcad34a82f321f0796064ffb.html#aef9fec26165b69baf8c7593fcd93327c">entt::basic_collector< matcher< type_list< Reject... >, type_list< Require... >, Rule... >, Other... >::group</a></div><div class="ttdeci">static constexpr auto group(exclude_t< NoneOf... >={}) ENTT_NOEXCEPT</div><div class="ttdoc">Adds a grouping matcher to the collector. </div><div class="ttdef"><b>Definition:</b> <a href="observer_8hpp_source.html#l00089">observer.hpp:89</a></div></div>
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<div class="ttc" id="classentt_1_1basic__observer_html_a31d9929b1c6d0b422ecbccff86803d3c"><div class="ttname"><a href="classentt_1_1basic__observer.html#a31d9929b1c6d0b422ecbccff86803d3c">entt::basic_observer::basic_observer</a></div><div class="ttdeci">basic_observer() ENTT_NOEXCEPT</div><div class="ttdoc">Default constructor. </div><div class="ttdef"><b>Definition:</b> <a href="observer_8hpp_source.html#l00270">observer.hpp:270</a></div></div>
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<div class="ttc" id="structentt_1_1basic__collector_3_4_html"><div class="ttname"><a href="structentt_1_1basic__collector_3_4.html">entt::basic_collector<></a></div><div class="ttdoc">Collector. </div><div class="ttdef"><b>Definition:</b> <a href="observer_8hpp_source.html#l00046">observer.hpp:46</a></div></div>
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<div class="ttc" id="classentt_1_1basic__storage_html_aab7da23b603d6cc78e67b3509ad979fa"><div class="ttname"><a href="classentt_1_1basic__storage.html#aab7da23b603d6cc78e67b3509ad979fa">entt::basic_storage::try_get</a></div><div class="ttdeci">const object_type * try_get(const entity_type entt) const ENTT_NOEXCEPT</div><div class="ttdoc">Returns a pointer to the object associated with an entity, if any. </div><div class="ttdef"><b>Definition:</b> <a href="storage_8hpp_source.html#l00294">storage.hpp:294</a></div></div>
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<div class="ttc" id="classentt_1_1basic__observer_html_a1337e8f885ca963383e5a3ed2a354955"><div class="ttname"><a href="classentt_1_1basic__observer.html#a1337e8f885ca963383e5a3ed2a354955">entt::basic_observer::disconnect</a></div><div class="ttdeci">void disconnect()</div><div class="ttdoc">Disconnects an observer from the registry it keeps track of. </div><div class="ttdef"><b>Definition:</b> <a href="observer_8hpp_source.html#l00322">observer.hpp:322</a></div></div>
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<div class="ttc" id="classentt_1_1basic__storage_html_a4cf7d707b57b6dd63c4d7852a23b6f5e"><div class="ttname"><a href="classentt_1_1basic__storage.html#a4cf7d707b57b6dd63c4d7852a23b6f5e">entt::basic_storage::construct</a></div><div class="ttdeci">object_type & construct(const entity_type entt, Args &&... args)</div><div class="ttdoc">Assigns an entity to a storage and constructs its object. </div><div class="ttdef"><b>Definition:</b> <a href="storage_8hpp_source.html#l00322">storage.hpp:322</a></div></div>
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<div class="ttc" id="classentt_1_1basic__observer_html_a0986b7af08f9b1bc70bd01b9bbe66cc4"><div class="ttname"><a href="classentt_1_1basic__observer.html#a0986b7af08f9b1bc70bd01b9bbe66cc4">entt::basic_observer::empty</a></div><div class="ttdeci">bool empty() const ENTT_NOEXCEPT</div><div class="ttdoc">Checks whether an observer is empty. </div><div class="ttdef"><b>Definition:</b> <a href="observer_8hpp_source.html#l00341">observer.hpp:341</a></div></div>
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<div class="ttc" id="structentt_1_1matcher_html"><div class="ttname"><a href="structentt_1_1matcher.html">entt::matcher</a></div><div class="ttdoc">Grouping matcher. </div><div class="ttdef"><b>Definition:</b> <a href="observer_8hpp_source.html#l00024">observer.hpp:24</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="algorithm_8hpp_source.html#l00012">algorithm.hpp:12</a></div></div>
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<div class="ttc" id="classentt_1_1basic__observer_html_a7954b77084292847aa1c8da9f22d8443"><div class="ttname"><a href="classentt_1_1basic__observer.html#a7954b77084292847aa1c8da9f22d8443">entt::basic_observer::iterator_type</a></div><div class="ttdeci">typename sparse_set< Entity >::iterator_type iterator_type</div><div class="ttdoc">Input iterator type. </div><div class="ttdef"><b>Definition:</b> <a href="observer_8hpp_source.html#l00267">observer.hpp:267</a></div></div>
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<div class="ttc" id="classentt_1_1basic__observer_html_afe16c233c8795aa7341d61cf86c1d2d7"><div class="ttname"><a href="classentt_1_1basic__observer.html#afe16c233c8795aa7341d61cf86c1d2d7">entt::basic_observer::end</a></div><div class="ttdeci">iterator_type end() const ENTT_NOEXCEPT</div><div class="ttdoc">Returns an iterator that is past the last entity of the observer. </div><div class="ttdef"><b>Definition:</b> <a href="observer_8hpp_source.html#l00383">observer.hpp:383</a></div></div>
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<div class="ttc" id="structentt_1_1storage_html"><div class="ttname"><a href="structentt_1_1storage.html">entt::storage< entity_type, payload_type ></a></div></div>
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<div class="ttc" id="classentt_1_1basic__observer_html_a535f3ddf32641a54e1c8861519933c97"><div class="ttname"><a href="classentt_1_1basic__observer.html#a535f3ddf32641a54e1c8861519933c97">entt::basic_observer::each</a></div><div class="ttdeci">void each(Func func)</div><div class="ttdoc">Iterates entities and applies the given function object to them, then clears the observer. </div><div class="ttdef"><b>Definition:</b> <a href="observer_8hpp_source.html#l00427">observer.hpp:427</a></div></div>
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<div class="ttc" id="namespaceentt_html_aea8b073b774362fe800d9cce3542927a"><div class="ttname"><a href="namespaceentt.html#aea8b073b774362fe800d9cce3542927a">entt::collector</a></div><div class="ttdeci">constexpr basic_collector collector</div><div class="ttdoc">Variable template used to ease the definition of collectors. </div><div class="ttdef"><b>Definition:</b> <a href="observer_8hpp_source.html#l00118">observer.hpp:118</a></div></div>
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<div class="ttc" id="classentt_1_1basic__observer_html_a435ebcce2d35f39b9f19ad84ffcdb4ea"><div class="ttname"><a href="classentt_1_1basic__observer.html#a435ebcce2d35f39b9f19ad84ffcdb4ea">entt::basic_observer::data</a></div><div class="ttdeci">const entity_type * data() const ENTT_NOEXCEPT</div><div class="ttdoc">Direct access to the list of entities of the observer. </div><div class="ttdef"><b>Definition:</b> <a href="observer_8hpp_source.html#l00357">observer.hpp:357</a></div></div>
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<div class="ttc" id="classentt_1_1basic__observer_html_af7a57f53ed7a6c835129480ff6594f7d"><div class="ttname"><a href="classentt_1_1basic__observer.html#af7a57f53ed7a6c835129480ff6594f7d">entt::basic_observer::entity_type</a></div><div class="ttdeci">Entity entity_type</div><div class="ttdoc">Underlying entity identifier. </div><div class="ttdef"><b>Definition:</b> <a href="observer_8hpp_source.html#l00263">observer.hpp:263</a></div></div>
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<div class="ttc" id="classentt_1_1basic__registry_html"><div class="ttname"><a href="classentt_1_1basic__registry.html">entt::basic_registry</a></div><div class="ttdoc">Fast and reliable entity-component system. </div><div class="ttdef"><b>Definition:</b> <a href="entity_2fwd_8hpp_source.html#l00013">fwd.hpp:13</a></div></div>
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<div class="ttc" id="classentt_1_1basic__view_html"><div class="ttname"><a href="classentt_1_1basic__view.html">entt::basic_view</a></div><div class="ttdoc">View. </div><div class="ttdef"><b>Definition:</b> <a href="entity_2fwd_8hpp_source.html#l00017">fwd.hpp:17</a></div></div>
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<div class="ttc" id="classentt_1_1basic__observer_html_a2290c465994e6af15f1fe7b35541ffbd"><div class="ttname"><a href="classentt_1_1basic__observer.html#a2290c465994e6af15f1fe7b35541ffbd">entt::basic_observer::basic_observer</a></div><div class="ttdeci">basic_observer(basic_registry< entity_type > &reg, basic_collector< Matcher... >) ENTT_NOEXCEPT</div><div class="ttdoc">Creates an observer and connects it to a given registry. </div><div class="ttdef"><b>Definition:</b> <a href="observer_8hpp_source.html#l00285">observer.hpp:285</a></div></div>
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<div class="ttc" id="structentt_1_1basic__collector_3_01matcher_3_01type__list_3_01Reject_8_8_8_01_4_00_01type__list_98a79514dcad34a82f321f0796064ffb_html_a96d7a22588a9f1f67ba805de1f027433"><div class="ttname"><a href="structentt_1_1basic__collector_3_01matcher_3_01type__list_3_01Reject_8_8_8_01_4_00_01type__list_98a79514dcad34a82f321f0796064ffb.html#a96d7a22588a9f1f67ba805de1f027433">entt::basic_collector< matcher< type_list< Reject... >, type_list< Require... >, Rule... >, Other... >::where</a></div><div class="ttdeci">static constexpr auto where(exclude_t< NoneOf... >={}) ENTT_NOEXCEPT</div><div class="ttdoc">Updates the filter of the last added matcher. </div><div class="ttdef"><b>Definition:</b> <a href="observer_8hpp_source.html#l00110">observer.hpp:110</a></div></div>
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<div class="ttc" id="classentt_1_1basic__observer_html_ade730cb09309ed7077616a908b25c2e7"><div class="ttname"><a href="classentt_1_1basic__observer.html#ade730cb09309ed7077616a908b25c2e7">entt::basic_observer::clear</a></div><div class="ttdeci">void clear()</div><div class="ttdoc">Resets the underlying container. </div><div class="ttdef"><b>Definition:</b> <a href="observer_8hpp_source.html#l00388">observer.hpp:388</a></div></div>
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<div class="ttc" id="structentt_1_1basic__collector_html"><div class="ttname"><a href="structentt_1_1basic__collector.html">entt::basic_collector</a></div><div class="ttdoc">Collector. </div><div class="ttdef"><b>Definition:</b> <a href="observer_8hpp_source.html#l00034">observer.hpp:34</a></div></div>
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<div class="ttc" id="structentt_1_1type__list_html"><div class="ttname"><a href="structentt_1_1type__list.html">entt::type_list</a></div><div class="ttdoc">A class to use to push around lists of types, nothing more. </div><div class="ttdef"><b>Definition:</b> <a href="type__traits_8hpp_source.html#l00042">type_traits.hpp:42</a></div></div>
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<div class="ttc" id="structentt_1_1basic__collector_3_01matcher_3_01type__list_3_01Reject_8_8_8_01_4_00_01type__list_98a79514dcad34a82f321f0796064ffb_html_a29c88a0f4e74f7e93d7ae7d08326a5b5"><div class="ttname"><a href="structentt_1_1basic__collector_3_01matcher_3_01type__list_3_01Reject_8_8_8_01_4_00_01type__list_98a79514dcad34a82f321f0796064ffb.html#a29c88a0f4e74f7e93d7ae7d08326a5b5">entt::basic_collector< matcher< type_list< Reject... >, type_list< Require... >, Rule... >, Other... >::replace</a></div><div class="ttdeci">static constexpr auto replace() ENTT_NOEXCEPT</div><div class="ttdoc">Adds an observing matcher to the collector. </div><div class="ttdef"><b>Definition:</b> <a href="observer_8hpp_source.html#l00099">observer.hpp:99</a></div></div>
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<div class="ttc" id="classentt_1_1basic__observer_html_a7d69a8bc866b01cc677de492bc436209"><div class="ttname"><a href="classentt_1_1basic__observer.html#a7d69a8bc866b01cc677de492bc436209">entt::basic_observer::connect</a></div><div class="ttdeci">void connect(basic_registry< entity_type > &reg, basic_collector< Matcher... >)</div><div class="ttdoc">Connects an observer to a given registry. </div><div class="ttdef"><b>Definition:</b> <a href="observer_8hpp_source.html#l00314">observer.hpp:314</a></div></div>
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<div class="ttc" id="structentt_1_1basic__collector_3_4_html_a634ac3a53ee686d7fb7121404b14c17e"><div class="ttname"><a href="structentt_1_1basic__collector_3_4.html#a634ac3a53ee686d7fb7121404b14c17e">entt::basic_collector<>::replace</a></div><div class="ttdeci">static constexpr auto replace() ENTT_NOEXCEPT</div><div class="ttdoc">Adds an observing matcher to the collector. </div><div class="ttdef"><b>Definition:</b> <a href="observer_8hpp_source.html#l00064">observer.hpp:64</a></div></div>
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<div class="ttc" id="structentt_1_1exclude__t_html"><div class="ttname"><a href="structentt_1_1exclude__t.html">entt::exclude_t</a></div><div class="ttdoc">Alias for exclusion lists. </div><div class="ttdef"><b>Definition:</b> <a href="entity_2utility_8hpp_source.html#l00016">utility.hpp:16</a></div></div>
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<div class="ttc" id="structentt_1_1basic__collector_3_4_html_a0d5a3c7d8d96f79585930f93939136f0"><div class="ttname"><a href="structentt_1_1basic__collector_3_4.html#a0d5a3c7d8d96f79585930f93939136f0">entt::basic_collector<>::group</a></div><div class="ttdeci">static constexpr auto group(exclude_t< NoneOf... >={}) ENTT_NOEXCEPT</div><div class="ttdoc">Adds a grouping matcher to the collector. </div><div class="ttdef"><b>Definition:</b> <a href="observer_8hpp_source.html#l00054">observer.hpp:54</a></div></div>
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<div class="ttc" id="classentt_1_1basic__observer_html_a147a0e35035fc3c19b67b31d66d2d80b"><div class="ttname"><a href="classentt_1_1basic__observer.html#a147a0e35035fc3c19b67b31d66d2d80b">entt::basic_observer::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="observer_8hpp_source.html#l00265">observer.hpp:265</a></div></div>
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<div class="ttc" id="namespaceentt_html_af2118c00dea16193aee017d1408beb53"><div class="ttname"><a href="namespaceentt.html#af2118c00dea16193aee017d1408beb53">entt::view</a></div><div class="ttdeci">basic_view< entity, Types... > view</div><div class="ttdoc">Alias declaration for the most common use case. </div><div class="ttdef"><b>Definition:</b> <a href="entity_2fwd_8hpp_source.html#l00076">fwd.hpp:76</a></div></div>
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<div class="ttc" id="classentt_1_1basic__observer_html_a181a6724835a3a41e33610003f738525"><div class="ttname"><a href="classentt_1_1basic__observer.html#a181a6724835a3a41e33610003f738525">entt::basic_observer::each</a></div><div class="ttdeci">void each(Func func) const</div><div class="ttdoc">Iterates entities and applies the given function object to them, then clears the observer. </div><div class="ttdef"><b>Definition:</b> <a href="observer_8hpp_source.html#l00407">observer.hpp:407</a></div></div>
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<div class="ttc" id="classentt_1_1basic__observer_html_ab42aeb1e1ffb32b98bc4da4f30755ec1"><div class="ttname"><a href="classentt_1_1basic__observer.html#ab42aeb1e1ffb32b98bc4da4f30755ec1">entt::basic_observer::size</a></div><div class="ttdeci">size_type size() const ENTT_NOEXCEPT</div><div class="ttdoc">Returns the number of elements in an observer. </div><div class="ttdef"><b>Definition:</b> <a href="observer_8hpp_source.html#l00333">observer.hpp:333</a></div></div>
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<div class="ttc" id="classentt_1_1basic__observer_html"><div class="ttname"><a href="classentt_1_1basic__observer.html">entt::basic_observer</a></div><div class="ttdoc">Observer. </div><div class="ttdef"><b>Definition:</b> <a href="entity_2fwd_8hpp_source.html#l00029">fwd.hpp:29</a></div></div>
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<div class="ttc" id="classentt_1_1basic__storage_html_ab59f0a70b5d25e66062e5ae5b501ab41"><div class="ttname"><a href="classentt_1_1basic__storage.html#ab59f0a70b5d25e66062e5ae5b501ab41">entt::basic_storage::destroy</a></div><div class="ttdeci">void destroy(const entity_type entt)</div><div class="ttdoc">Removes an entity from a storage and destroys its object. </div><div class="ttdef"><b>Definition:</b> <a href="storage_8hpp_source.html#l00379">storage.hpp:379</a></div></div>
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<div class="ttc" id="classentt_1_1sparse__set_html_a580b210d5a24c49ca8c255646f3bb469"><div class="ttname"><a href="classentt_1_1sparse__set.html#a580b210d5a24c49ca8c255646f3bb469">entt::sparse_set::iterator_type</a></div><div class="ttdeci">iterator iterator_type</div><div class="ttdoc">Random access iterator type. </div><div class="ttdef"><b>Definition:</b> <a href="sparse__set_8hpp_source.html#l00182">sparse_set.hpp:182</a></div></div>
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