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 <span id="projectnumber">3.10.0</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="title">observer.hpp</div> </div>
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<div class="contents">
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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>
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<div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="preprocessor">#define ENTT_ENTITY_OBSERVER_HPP</span></div>
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<div class="line"><a name="l00003"></a><span class="lineno"> 3</span>  </div>
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<div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="preprocessor">#include <cstddef></span></div>
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<div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="preprocessor">#include <cstdint></span></div>
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<div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="preprocessor">#include <limits></span></div>
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<div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="preprocessor">#include <type_traits></span></div>
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<div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="preprocessor">#include <utility></span></div>
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<div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="preprocessor">#include "../config/config.h"</span></div>
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<div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="preprocessor">#include "../core/type_traits.hpp"</span></div>
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<div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="preprocessor">#include "../signal/delegate.hpp"</span></div>
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<div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="preprocessor">#include "entity.hpp"</span></div>
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<div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="preprocessor">#include "fwd.hpp"</span></div>
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<div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="preprocessor">#include "registry.hpp"</span></div>
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<div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="preprocessor">#include "storage.hpp"</span></div>
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<div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="preprocessor">#include "utility.hpp"</span></div>
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<div class="line"><a name="l00017"></a><span class="lineno"> 17</span>  </div>
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<div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="keyword">namespace </span><a class="code" href="namespaceentt.html">entt</a> {</div>
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<div class="line"><a name="l00019"></a><span class="lineno"> 19</span>  </div>
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<div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="keyword">template</span><<span class="keyword">typename</span>...></div>
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<div class="line"><a name="l00022"></a><span class="lineno"><a class="line" href="structentt_1_1matcher.html"> 22</a></span> <span class="keyword">struct </span><a class="code" href="structentt_1_1matcher.html">matcher</a> {};</div>
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<div class="line"><a name="l00023"></a><span class="lineno"> 23</span>  </div>
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<div class="line"><a name="l00030"></a><span class="lineno"> 30</span> <span class="keyword">template</span><<span class="keyword">typename</span>...></div>
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<div class="line"><a name="l00031"></a><span class="lineno"><a class="line" href="structentt_1_1basic__collector.html"> 31</a></span> <span class="keyword">struct </span><a class="code" href="structentt_1_1basic__collector.html">basic_collector</a>;</div>
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<div class="line"><a name="l00032"></a><span class="lineno"> 32</span>  </div>
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<div class="line"><a name="l00041"></a><span class="lineno"> 41</span> <span class="keyword">template</span><></div>
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<div class="line"><a name="l00042"></a><span class="lineno"><a class="line" href="structentt_1_1basic__collector_3_4.html"> 42</a></span> <span class="keyword">struct </span><a class="code" href="structentt_1_1basic__collector_3_4.html">basic_collector<></a> {</div>
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<div class="line"><a name="l00049"></a><span class="lineno"> 49</span>  <span class="keyword">template</span><<span class="keyword">typename</span>... AllOf, <span class="keyword">typename</span>... NoneOf></div>
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<div class="line"><a name="l00050"></a><span class="lineno"><a class="line" href="structentt_1_1basic__collector_3_4.html#a40cd31653a616e0e87a6f9d840c36d5d"> 50</a></span>  <span class="keyword">static</span> constexpr <span class="keyword">auto</span> <a class="code" href="structentt_1_1basic__collector_3_4.html#a40cd31653a616e0e87a6f9d840c36d5d">group</a>(<a class="code" href="structentt_1_1exclude__t.html">exclude_t<NoneOf...></a> = {}) ENTT_NOEXCEPT {</div>
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<div class="line"><a name="l00051"></a><span class="lineno"> 51</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>
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<div class="line"><a name="l00052"></a><span class="lineno"> 52</span>  }</div>
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<div class="line"><a name="l00053"></a><span class="lineno"> 53</span>  </div>
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<div class="line"><a name="l00059"></a><span class="lineno"> 59</span>  <span class="keyword">template</span><<span class="keyword">typename</span> AnyOf></div>
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<div class="line"><a name="l00060"></a><span class="lineno"><a class="line" href="structentt_1_1basic__collector_3_4.html#af84fbd53436ec60b1e158b3d685a91d9"> 60</a></span>  <span class="keyword">static</span> constexpr <span class="keyword">auto</span> <a class="code" href="structentt_1_1basic__collector_3_4.html#af84fbd53436ec60b1e158b3d685a91d9">update</a>() ENTT_NOEXCEPT {</div>
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<div class="line"><a name="l00061"></a><span class="lineno"> 61</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>
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<div class="line"><a name="l00062"></a><span class="lineno"> 62</span>  }</div>
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<div class="line"><a name="l00063"></a><span class="lineno"> 63</span> };</div>
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<div class="line"><a name="l00064"></a><span class="lineno"> 64</span>  </div>
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<div class="line"><a name="l00073"></a><span class="lineno"> 73</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>
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<div class="line"><a name="l00074"></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"> 74</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>
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<div class="line"><a name="l00076"></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"> 76</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>
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<div class="line"><a name="l00077"></a><span class="lineno"> 77</span>  </div>
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<div class="line"><a name="l00084"></a><span class="lineno"> 84</span>  <span class="keyword">template</span><<span class="keyword">typename</span>... AllOf, <span class="keyword">typename</span>... NoneOf></div>
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<div class="line"><a name="l00085"></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#a72c0576faa0e9a418fa72fd25987b9f4"> 85</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#a72c0576faa0e9a418fa72fd25987b9f4">group</a>(<a class="code" href="structentt_1_1exclude__t.html">exclude_t<NoneOf...></a> = {}) ENTT_NOEXCEPT {</div>
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<div class="line"><a name="l00086"></a><span class="lineno"> 86</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...>, current_type, Other...>{};</div>
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<div class="line"><a name="l00087"></a><span class="lineno"> 87</span>  }</div>
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<div class="line"><a name="l00088"></a><span class="lineno"> 88</span>  </div>
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<div class="line"><a name="l00094"></a><span class="lineno"> 94</span>  <span class="keyword">template</span><<span class="keyword">typename</span> AnyOf></div>
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<div class="line"><a name="l00095"></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#ac8bd4af93eec6631c6b3a56353d8b615"> 95</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#ac8bd4af93eec6631c6b3a56353d8b615">update</a>() ENTT_NOEXCEPT {</div>
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<div class="line"><a name="l00096"></a><span class="lineno"> 96</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>
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<div class="line"><a name="l00097"></a><span class="lineno"> 97</span>  }</div>
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<div class="line"><a name="l00098"></a><span class="lineno"> 98</span>  </div>
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<div class="line"><a name="l00105"></a><span class="lineno"> 105</span>  <span class="keyword">template</span><<span class="keyword">typename</span>... AllOf, <span class="keyword">typename</span>... NoneOf></div>
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<div class="line"><a name="l00106"></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#a21c361071415791fd940201a685b938e"> 106</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#a21c361071415791fd940201a685b938e">where</a>(<a class="code" href="structentt_1_1exclude__t.html">exclude_t<NoneOf...></a> = {}) ENTT_NOEXCEPT {</div>
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<div class="line"><a name="l00107"></a><span class="lineno"> 107</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>
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<div class="line"><a name="l00108"></a><span class="lineno"> 108</span>  <span class="keywordflow">return</span> <a class="code" href="structentt_1_1basic__collector.html">basic_collector</a><extended_type, Other...>{};</div>
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<div class="line"><a name="l00109"></a><span class="lineno"> 109</span>  }</div>
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<div class="line"><a name="l00110"></a><span class="lineno"> 110</span> };</div>
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<div class="line"><a name="l00111"></a><span class="lineno"> 111</span>  </div>
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<div class="line"><a name="l00113"></a><span class="lineno"><a class="line" href="namespaceentt.html#aea8b073b774362fe800d9cce3542927a"> 113</a></span> <span class="keyword">inline</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>
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<div class="line"><a name="l00114"></a><span class="lineno"> 114</span>  </div>
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<div class="line"><a name="l00164"></a><span class="lineno"> 164</span> <span class="keyword">template</span><<span class="keyword">typename</span> Entity></div>
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<div class="line"><a name="l00165"></a><span class="lineno"><a class="line" href="classentt_1_1basic__observer.html"> 165</a></span> <span class="keyword">class </span><a class="code" href="classentt_1_1basic__observer.html">basic_observer</a> {</div>
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<div class="line"><a name="l00166"></a><span class="lineno"> 166</span>  <span class="keyword">using</span> payload_type = std::uint32_t;</div>
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<div class="line"><a name="l00167"></a><span class="lineno"> 167</span>  </div>
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<div class="line"><a name="l00168"></a><span class="lineno"> 168</span>  <span class="keyword">template</span><<span class="keyword">typename</span>></div>
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<div class="line"><a name="l00169"></a><span class="lineno"> 169</span>  <span class="keyword">struct </span>matcher_handler;</div>
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<div class="line"><a name="l00170"></a><span class="lineno"> 170</span>  </div>
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<div class="line"><a name="l00171"></a><span class="lineno"> 171</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>
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<div class="line"><a name="l00172"></a><span class="lineno"> 172</span>  <span class="keyword">struct </span>matcher_handler<<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...>, AnyOf>> {</div>
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<div class="line"><a name="l00173"></a><span class="lineno"> 173</span>  <span class="keyword">template</span><std::<span class="keywordtype">size_t</span> Index></div>
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<div class="line"><a name="l00174"></a><span class="lineno"> 174</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, <a class="code" href="classentt_1_1basic__registry.html">basic_registry<Entity></a> &reg, <span class="keyword">const</span> Entity <a class="code" href="namespaceentt.html">entt</a>) {</div>
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<div class="line"><a name="l00175"></a><span class="lineno"> 175</span>  <span class="keywordflow">if</span>(reg.template all_of<Require...>(<a class="code" href="namespaceentt.html">entt</a>) && !reg.template any_of<Reject...>(<a class="code" href="namespaceentt.html">entt</a>)) {</div>
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<div class="line"><a name="l00176"></a><span class="lineno"> 176</span>  <span class="keywordflow">if</span>(!obs.storage.<a class="code" href="classentt_1_1basic__sparse__set.html#ad2c7f1ac19e1040c2c2d2245f521f291">contains</a>(<a class="code" href="namespaceentt.html">entt</a>)) {</div>
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<div class="line"><a name="l00177"></a><span class="lineno"> 177</span>  obs.storage.<a class="code" href="classentt_1_1basic__storage.html#a7e6c99b2c108586141a75145748b2e8d">emplace</a>(<a class="code" href="namespaceentt.html">entt</a>);</div>
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<div class="line"><a name="l00178"></a><span class="lineno"> 178</span>  }</div>
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<div class="line"><a name="l00179"></a><span class="lineno"> 179</span>  </div>
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<div class="line"><a name="l00180"></a><span class="lineno"> 180</span>  obs.storage.<a class="code" href="classentt_1_1basic__storage.html#afdb98de467567bf81772382ba2970413">get</a>(<a class="code" href="namespaceentt.html">entt</a>) |= (1 << Index);</div>
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<div class="line"><a name="l00181"></a><span class="lineno"> 181</span>  }</div>
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<div class="line"><a name="l00182"></a><span class="lineno"> 182</span>  }</div>
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<div class="line"><a name="l00183"></a><span class="lineno"> 183</span>  </div>
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<div class="line"><a name="l00184"></a><span class="lineno"> 184</span>  <span class="keyword">template</span><std::<span class="keywordtype">size_t</span> Index></div>
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<div class="line"><a name="l00185"></a><span class="lineno"> 185</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, <a class="code" href="classentt_1_1basic__registry.html">basic_registry<Entity></a> &, <span class="keyword">const</span> Entity <a class="code" href="namespaceentt.html">entt</a>) {</div>
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<div class="line"><a name="l00186"></a><span class="lineno"> 186</span>  <span class="keywordflow">if</span>(obs.storage.<a class="code" href="classentt_1_1basic__sparse__set.html#ad2c7f1ac19e1040c2c2d2245f521f291">contains</a>(<a class="code" href="namespaceentt.html">entt</a>) && !(obs.storage.<a class="code" href="classentt_1_1basic__storage.html#afdb98de467567bf81772382ba2970413">get</a>(<a class="code" href="namespaceentt.html">entt</a>) &= (~(1 << Index)))) {</div>
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<div class="line"><a name="l00187"></a><span class="lineno"> 187</span>  obs.storage.<a class="code" href="classentt_1_1basic__sparse__set.html#a0a41589e81003ca86b8a6104842680cb">erase</a>(<a class="code" href="namespaceentt.html">entt</a>);</div>
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<div class="line"><a name="l00188"></a><span class="lineno"> 188</span>  }</div>
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<div class="line"><a name="l00189"></a><span class="lineno"> 189</span>  }</div>
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<div class="line"><a name="l00190"></a><span class="lineno"> 190</span>  </div>
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<div class="line"><a name="l00191"></a><span class="lineno"> 191</span>  <span class="keyword">template</span><std::<span class="keywordtype">size_t</span> Index></div>
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<div class="line"><a name="l00192"></a><span class="lineno"> 192</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>
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<div class="line"><a name="l00193"></a><span class="lineno"> 193</span>  (reg.template on_destroy<Require>().template connect<&discard_if<Index>>(obs), ...);</div>
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<div class="line"><a name="l00194"></a><span class="lineno"> 194</span>  (reg.template on_construct<Reject>().template connect<&discard_if<Index>>(obs), ...);</div>
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<div class="line"><a name="l00195"></a><span class="lineno"> 195</span>  reg.template on_update<AnyOf>().template connect<&maybe_valid_if<Index>>(obs);</div>
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<div class="line"><a name="l00196"></a><span class="lineno"> 196</span>  reg.template on_destroy<AnyOf>().template connect<&discard_if<Index>>(obs);</div>
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<div class="line"><a name="l00197"></a><span class="lineno"> 197</span>  }</div>
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<div class="line"><a name="l00198"></a><span class="lineno"> 198</span>  </div>
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<div class="line"><a name="l00199"></a><span class="lineno"> 199</span>  <span class="keyword">static</span> <span class="keywordtype">void</span> <a class="code" href="classentt_1_1basic__observer.html#a1337e8f885ca963383e5a3ed2a354955">disconnect</a>(<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>
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<div class="line"><a name="l00200"></a><span class="lineno"> 200</span>  (reg.template on_destroy<Require>().disconnect(obs), ...);</div>
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<div class="line"><a name="l00201"></a><span class="lineno"> 201</span>  (reg.template on_construct<Reject>().disconnect(obs), ...);</div>
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<div class="line"><a name="l00202"></a><span class="lineno"> 202</span>  reg.template on_update<AnyOf>().disconnect(obs);</div>
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<div class="line"><a name="l00203"></a><span class="lineno"> 203</span>  reg.template on_destroy<AnyOf>().disconnect(obs);</div>
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<div class="line"><a name="l00204"></a><span class="lineno"> 204</span>  }</div>
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<div class="line"><a name="l00205"></a><span class="lineno"> 205</span>  };</div>
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<div class="line"><a name="l00206"></a><span class="lineno"> 206</span>  </div>
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<div class="line"><a name="l00207"></a><span class="lineno"> 207</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>
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<div class="line"><a name="l00208"></a><span class="lineno"> 208</span>  <span class="keyword">struct </span>matcher_handler<<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...>, <a class="code" href="structentt_1_1type__list.html">type_list</a><NoneOf...>, AllOf...>> {</div>
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<div class="line"><a name="l00209"></a><span class="lineno"> 209</span>  <span class="keyword">template</span><std::size_t Index, <span class="keyword">typename</span>... Ignore></div>
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<div class="line"><a name="l00210"></a><span class="lineno"> 210</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, <a class="code" href="classentt_1_1basic__registry.html">basic_registry<Entity></a> &reg, <span class="keyword">const</span> Entity <a class="code" href="namespaceentt.html">entt</a>) {</div>
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<div class="line"><a name="l00211"></a><span class="lineno"> 211</span>  <span class="keyword">auto</span> condition = [&reg, <a class="code" href="namespaceentt.html">entt</a>]() {</div>
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<div class="line"><a name="l00212"></a><span class="lineno"> 212</span>  <span class="keywordflow">if</span> constexpr(<span class="keyword">sizeof</span>...(Ignore) == 0) {</div>
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<div class="line"><a name="l00213"></a><span class="lineno"> 213</span>  <span class="keywordflow">return</span> reg.template all_of<AllOf..., Require...>(<a class="code" href="namespaceentt.html">entt</a>) && !reg.template any_of<NoneOf..., Reject...>(<a class="code" href="namespaceentt.html">entt</a>);</div>
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<div class="line"><a name="l00214"></a><span class="lineno"> 214</span>  } <span class="keywordflow">else</span> {</div>
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<div class="line"><a name="l00215"></a><span class="lineno"> 215</span>  <span class="keywordflow">return</span> reg.template all_of<AllOf..., Require...>(<a class="code" href="namespaceentt.html">entt</a>) && ((std::is_same_v<Ignore..., NoneOf> || !reg.template any_of<NoneOf>(<a class="code" href="namespaceentt.html">entt</a>)) && ...) && !reg.template any_of<Reject...>(<a class="code" href="namespaceentt.html">entt</a>);</div>
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<div class="line"><a name="l00216"></a><span class="lineno"> 216</span>  }</div>
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<div class="line"><a name="l00217"></a><span class="lineno"> 217</span>  };</div>
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<div class="line"><a name="l00218"></a><span class="lineno"> 218</span>  </div>
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<div class="line"><a name="l00219"></a><span class="lineno"> 219</span>  <span class="keywordflow">if</span>(condition()) {</div>
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<div class="line"><a name="l00220"></a><span class="lineno"> 220</span>  <span class="keywordflow">if</span>(!obs.storage.<a class="code" href="classentt_1_1basic__sparse__set.html#ad2c7f1ac19e1040c2c2d2245f521f291">contains</a>(<a class="code" href="namespaceentt.html">entt</a>)) {</div>
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<div class="line"><a name="l00221"></a><span class="lineno"> 221</span>  obs.storage.<a class="code" href="classentt_1_1basic__storage.html#a7e6c99b2c108586141a75145748b2e8d">emplace</a>(<a class="code" href="namespaceentt.html">entt</a>);</div>
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<div class="line"><a name="l00222"></a><span class="lineno"> 222</span>  }</div>
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<div class="line"><a name="l00223"></a><span class="lineno"> 223</span>  </div>
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<div class="line"><a name="l00224"></a><span class="lineno"> 224</span>  obs.storage.<a class="code" href="classentt_1_1basic__storage.html#afdb98de467567bf81772382ba2970413">get</a>(<a class="code" href="namespaceentt.html">entt</a>) |= (1 << Index);</div>
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<div class="line"><a name="l00225"></a><span class="lineno"> 225</span>  }</div>
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<div class="line"><a name="l00226"></a><span class="lineno"> 226</span>  }</div>
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<div class="line"><a name="l00227"></a><span class="lineno"> 227</span>  </div>
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<div class="line"><a name="l00228"></a><span class="lineno"> 228</span>  <span class="keyword">template</span><std::<span class="keywordtype">size_t</span> Index></div>
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<div class="line"><a name="l00229"></a><span class="lineno"> 229</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, <a class="code" href="classentt_1_1basic__registry.html">basic_registry<Entity></a> &, <span class="keyword">const</span> Entity <a class="code" href="namespaceentt.html">entt</a>) {</div>
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<div class="line"><a name="l00230"></a><span class="lineno"> 230</span>  <span class="keywordflow">if</span>(obs.storage.<a class="code" href="classentt_1_1basic__sparse__set.html#ad2c7f1ac19e1040c2c2d2245f521f291">contains</a>(<a class="code" href="namespaceentt.html">entt</a>) && !(obs.storage.<a class="code" href="classentt_1_1basic__storage.html#afdb98de467567bf81772382ba2970413">get</a>(<a class="code" href="namespaceentt.html">entt</a>) &= (~(1 << Index)))) {</div>
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<div class="line"><a name="l00231"></a><span class="lineno"> 231</span>  obs.storage.<a class="code" href="classentt_1_1basic__sparse__set.html#a0a41589e81003ca86b8a6104842680cb">erase</a>(<a class="code" href="namespaceentt.html">entt</a>);</div>
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<div class="line"><a name="l00232"></a><span class="lineno"> 232</span>  }</div>
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<div class="line"><a name="l00233"></a><span class="lineno"> 233</span>  }</div>
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<div class="line"><a name="l00234"></a><span class="lineno"> 234</span>  </div>
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<div class="line"><a name="l00235"></a><span class="lineno"> 235</span>  <span class="keyword">template</span><std::<span class="keywordtype">size_t</span> Index></div>
|
|
<div class="line"><a name="l00236"></a><span class="lineno"> 236</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>
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<div class="line"><a name="l00237"></a><span class="lineno"> 237</span>  (reg.template on_destroy<Require>().template connect<&discard_if<Index>>(obs), ...);</div>
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<div class="line"><a name="l00238"></a><span class="lineno"> 238</span>  (reg.template on_construct<Reject>().template connect<&discard_if<Index>>(obs), ...);</div>
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<div class="line"><a name="l00239"></a><span class="lineno"> 239</span>  (reg.template on_construct<AllOf>().template connect<&maybe_valid_if<Index>>(obs), ...);</div>
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<div class="line"><a name="l00240"></a><span class="lineno"> 240</span>  (reg.template on_destroy<NoneOf>().template connect<&maybe_valid_if<Index, NoneOf>>(obs), ...);</div>
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<div class="line"><a name="l00241"></a><span class="lineno"> 241</span>  (reg.template on_destroy<AllOf>().template connect<&discard_if<Index>>(obs), ...);</div>
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<div class="line"><a name="l00242"></a><span class="lineno"> 242</span>  (reg.template on_construct<NoneOf>().template connect<&discard_if<Index>>(obs), ...);</div>
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<div class="line"><a name="l00243"></a><span class="lineno"> 243</span>  }</div>
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<div class="line"><a name="l00244"></a><span class="lineno"> 244</span>  </div>
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<div class="line"><a name="l00245"></a><span class="lineno"> 245</span>  <span class="keyword">static</span> <span class="keywordtype">void</span> <a class="code" href="classentt_1_1basic__observer.html#a1337e8f885ca963383e5a3ed2a354955">disconnect</a>(<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>
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<div class="line"><a name="l00246"></a><span class="lineno"> 246</span>  (reg.template on_destroy<Require>().disconnect(obs), ...);</div>
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<div class="line"><a name="l00247"></a><span class="lineno"> 247</span>  (reg.template on_construct<Reject>().disconnect(obs), ...);</div>
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<div class="line"><a name="l00248"></a><span class="lineno"> 248</span>  (reg.template on_construct<AllOf>().disconnect(obs), ...);</div>
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<div class="line"><a name="l00249"></a><span class="lineno"> 249</span>  (reg.template on_destroy<NoneOf>().disconnect(obs), ...);</div>
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<div class="line"><a name="l00250"></a><span class="lineno"> 250</span>  (reg.template on_destroy<AllOf>().disconnect(obs), ...);</div>
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<div class="line"><a name="l00251"></a><span class="lineno"> 251</span>  (reg.template on_construct<NoneOf>().disconnect(obs), ...);</div>
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<div class="line"><a name="l00252"></a><span class="lineno"> 252</span>  }</div>
|
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<div class="line"><a name="l00253"></a><span class="lineno"> 253</span>  };</div>
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<div class="line"><a name="l00254"></a><span class="lineno"> 254</span>  </div>
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<div class="line"><a name="l00255"></a><span class="lineno"> 255</span>  <span class="keyword">template</span><<span class="keyword">typename</span>... Matcher></div>
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<div class="line"><a name="l00256"></a><span class="lineno"> 256</span>  <span class="keyword">static</span> <span class="keywordtype">void</span> <a class="code" href="classentt_1_1basic__observer.html#a1337e8f885ca963383e5a3ed2a354955">disconnect</a>(<a class="code" href="classentt_1_1basic__registry.html">basic_registry<Entity></a> &reg, <a class="code" href="classentt_1_1basic__observer.html">basic_observer</a> &obs) {</div>
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<div class="line"><a name="l00257"></a><span class="lineno"> 257</span>  (matcher_handler<Matcher>::disconnect(obs, reg), ...);</div>
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<div class="line"><a name="l00258"></a><span class="lineno"> 258</span>  }</div>
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<div class="line"><a name="l00259"></a><span class="lineno"> 259</span>  </div>
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<div class="line"><a name="l00260"></a><span class="lineno"> 260</span>  <span class="keyword">template</span><<span class="keyword">typename</span>... Matcher, std::size_t... Index></div>
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<div class="line"><a name="l00261"></a><span class="lineno"> 261</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>
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<div class="line"><a name="l00262"></a><span class="lineno"> 262</span>  static_assert(<span class="keyword">sizeof</span>...(Matcher) < std::numeric_limits<payload_type>::digits, <span class="stringliteral">"Too many matchers"</span>);</div>
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<div class="line"><a name="l00263"></a><span class="lineno"> 263</span>  (matcher_handler<Matcher>::template connect<Index>(*<span class="keyword">this</span>, reg), ...);</div>
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<div class="line"><a name="l00264"></a><span class="lineno"> 264</span>  release.template connect<&<a class="code" href="classentt_1_1basic__observer.html#a1337e8f885ca963383e5a3ed2a354955">basic_observer::disconnect</a><Matcher...>>(reg);</div>
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<div class="line"><a name="l00265"></a><span class="lineno"> 265</span>  }</div>
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<div class="line"><a name="l00266"></a><span class="lineno"> 266</span>  </div>
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<div class="line"><a name="l00267"></a><span class="lineno"> 267</span> <span class="keyword">public</span>:</div>
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<div class="line"><a name="l00269"></a><span class="lineno"><a class="line" href="classentt_1_1basic__observer.html#af7a57f53ed7a6c835129480ff6594f7d"> 269</a></span>  <span class="keyword">using</span> <a class="code" href="classentt_1_1basic__observer.html#af7a57f53ed7a6c835129480ff6594f7d">entity_type</a> = Entity;</div>
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<div class="line"><a name="l00271"></a><span class="lineno"><a class="line" href="classentt_1_1basic__observer.html#a147a0e35035fc3c19b67b31d66d2d80b"> 271</a></span>  <span class="keyword">using</span> <a class="code" href="classentt_1_1basic__observer.html#a147a0e35035fc3c19b67b31d66d2d80b">size_type</a> = std::size_t;</div>
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<div class="line"><a name="l00273"></a><span class="lineno"><a class="line" href="classentt_1_1basic__observer.html#a3b57e5efae80301542b1b4011debb680"> 273</a></span>  <span class="keyword">using</span> <a class="code" href="classentt_1_1basic__observer.html#a3b57e5efae80301542b1b4011debb680">iterator</a> = <span class="keyword">typename</span> <a class="code" href="classentt_1_1basic__sparse__set.html#a6cea231ae7386a12487164d918f632b0">basic_sparse_set<Entity>::iterator</a>;</div>
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<div class="line"><a name="l00274"></a><span class="lineno"> 274</span>  </div>
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<div class="line"><a name="l00276"></a><span class="lineno"><a class="line" href="classentt_1_1basic__observer.html#adfb08de0ef1c0f57fadc6f6d171b931a"> 276</a></span>  <a class="code" href="classentt_1_1basic__observer.html#adfb08de0ef1c0f57fadc6f6d171b931a">basic_observer</a>()</div>
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<div class="line"><a name="l00277"></a><span class="lineno"> 277</span>  : release{},</div>
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<div class="line"><a name="l00278"></a><span class="lineno"> 278</span>  <a class="code" href="classentt_1_1basic__storage.html">storage</a>{} {}</div>
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<div class="line"><a name="l00279"></a><span class="lineno"> 279</span>  </div>
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<div class="line"><a name="l00281"></a><span class="lineno"><a class="line" href="classentt_1_1basic__observer.html#aa685204c94266b5631c13540012e73c2"> 281</a></span>  <a class="code" href="classentt_1_1basic__observer.html#aa685204c94266b5631c13540012e73c2">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>
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<div class="line"><a name="l00283"></a><span class="lineno"><a class="line" href="classentt_1_1basic__observer.html#accbe2546b1b74de1a59e673cb6250413"> 283</a></span>  <a class="code" href="classentt_1_1basic__observer.html#accbe2546b1b74de1a59e673cb6250413">basic_observer</a>(<a class="code" href="classentt_1_1basic__observer.html">basic_observer</a> &&) = <span class="keyword">delete</span>;</div>
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<div class="line"><a name="l00284"></a><span class="lineno"> 284</span>  </div>
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<div class="line"><a name="l00290"></a><span class="lineno"> 290</span>  <span class="keyword">template</span><<span class="keyword">typename</span>... Matcher></div>
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<div class="line"><a name="l00291"></a><span class="lineno"><a class="line" href="classentt_1_1basic__observer.html#abef3c847acf610f1a6f856b05f0f0721"> 291</a></span>  <a class="code" href="classentt_1_1basic__observer.html#abef3c847acf610f1a6f856b05f0f0721">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>)</div>
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<div class="line"><a name="l00292"></a><span class="lineno"> 292</span>  : <a class="code" href="classentt_1_1basic__observer.html">basic_observer</a>{} {</div>
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<div class="line"><a name="l00293"></a><span class="lineno"> 293</span>  connect<Matcher...>(reg, std::index_sequence_for<Matcher...>{});</div>
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<div class="line"><a name="l00294"></a><span class="lineno"> 294</span>  }</div>
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<div class="line"><a name="l00295"></a><span class="lineno"> 295</span>  </div>
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<div class="line"><a name="l00297"></a><span class="lineno"><a class="line" href="classentt_1_1basic__observer.html#afb6fbd2a5ce7bc57013b0bd9ad482599"> 297</a></span>  <a class="code" href="classentt_1_1basic__observer.html#afb6fbd2a5ce7bc57013b0bd9ad482599">~basic_observer</a>() = <span class="keywordflow">default</span>;</div>
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<div class="line"><a name="l00298"></a><span class="lineno"> 298</span>  </div>
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<div class="line"><a name="l00303"></a><span class="lineno"><a class="line" href="classentt_1_1basic__observer.html#a03dcb6b0999d29bc39410d7ae6d9ac53"> 303</a></span>  <a class="code" href="classentt_1_1basic__observer.html">basic_observer</a> &<a class="code" href="classentt_1_1basic__observer.html#a03dcb6b0999d29bc39410d7ae6d9ac53">operator=</a>(<span class="keyword">const</span> <a class="code" href="classentt_1_1basic__observer.html">basic_observer</a> &) = <span class="keyword">delete</span>;</div>
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<div class="line"><a name="l00304"></a><span class="lineno"> 304</span>  </div>
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<div class="line"><a name="l00309"></a><span class="lineno"><a class="line" href="classentt_1_1basic__observer.html#a8b7cd199f236a4dee02f202ec0fd6281"> 309</a></span>  <a class="code" href="classentt_1_1basic__observer.html">basic_observer</a> &<a class="code" href="classentt_1_1basic__observer.html#a8b7cd199f236a4dee02f202ec0fd6281">operator=</a>(<a class="code" href="classentt_1_1basic__observer.html">basic_observer</a> &&) = <span class="keyword">delete</span>;</div>
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<div class="line"><a name="l00310"></a><span class="lineno"> 310</span>  </div>
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<div class="line"><a name="l00316"></a><span class="lineno"> 316</span>  <span class="keyword">template</span><<span class="keyword">typename</span>... Matcher></div>
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<div class="line"><a name="l00317"></a><span class="lineno"><a class="line" href="classentt_1_1basic__observer.html#a7d69a8bc866b01cc677de492bc436209"> 317</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>
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<div class="line"><a name="l00318"></a><span class="lineno"> 318</span>  <a class="code" href="classentt_1_1basic__observer.html#a1337e8f885ca963383e5a3ed2a354955">disconnect</a>();</div>
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<div class="line"><a name="l00319"></a><span class="lineno"> 319</span>  connect<Matcher...>(reg, std::index_sequence_for<Matcher...>{});</div>
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<div class="line"><a name="l00320"></a><span class="lineno"> 320</span>  <a class="code" href="classentt_1_1basic__storage.html">storage</a>.<a class="code" href="classentt_1_1basic__sparse__set.html#a6560773b887906122d50a413aea1faad">clear</a>();</div>
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<div class="line"><a name="l00321"></a><span class="lineno"> 321</span>  }</div>
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<div class="line"><a name="l00322"></a><span class="lineno"> 322</span>  </div>
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<div class="line"><a name="l00324"></a><span class="lineno"><a class="line" href="classentt_1_1basic__observer.html#a1337e8f885ca963383e5a3ed2a354955"> 324</a></span>  <span class="keywordtype">void</span> <a class="code" href="classentt_1_1basic__observer.html#a1337e8f885ca963383e5a3ed2a354955">disconnect</a>() {</div>
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<div class="line"><a name="l00325"></a><span class="lineno"> 325</span>  <span class="keywordflow">if</span>(release) {</div>
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<div class="line"><a name="l00326"></a><span class="lineno"> 326</span>  release(*<span class="keyword">this</span>);</div>
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<div class="line"><a name="l00327"></a><span class="lineno"> 327</span>  release.reset();</div>
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<div class="line"><a name="l00328"></a><span class="lineno"> 328</span>  }</div>
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<div class="line"><a name="l00329"></a><span class="lineno"> 329</span>  }</div>
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<div class="line"><a name="l00330"></a><span class="lineno"> 330</span>  </div>
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<div class="line"><a name="l00335"></a><span class="lineno"><a class="line" href="classentt_1_1basic__observer.html#aae9024a8c5b14adfe90690a56fa09935"> 335</a></span>  [[nodiscard]] <a class="code" href="classentt_1_1basic__observer.html#a147a0e35035fc3c19b67b31d66d2d80b">size_type</a> <a class="code" href="classentt_1_1basic__observer.html#aae9024a8c5b14adfe90690a56fa09935">size</a>() const ENTT_NOEXCEPT {</div>
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<div class="line"><a name="l00336"></a><span class="lineno"> 336</span>  <span class="keywordflow">return</span> <a class="code" href="classentt_1_1basic__storage.html">storage</a>.<a class="code" href="classentt_1_1basic__sparse__set.html#a781b6cee81c02b5dd601d0c808cf97a8">size</a>();</div>
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<div class="line"><a name="l00337"></a><span class="lineno"> 337</span>  }</div>
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<div class="line"><a name="l00338"></a><span class="lineno"> 338</span>  </div>
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<div class="line"><a name="l00343"></a><span class="lineno"><a class="line" href="classentt_1_1basic__observer.html#a591a0ed89d0b2cabfb51b729bfb33c3e"> 343</a></span>  [[nodiscard]] <span class="keywordtype">bool</span> <a class="code" href="classentt_1_1basic__observer.html#a591a0ed89d0b2cabfb51b729bfb33c3e">empty</a>() const ENTT_NOEXCEPT {</div>
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<div class="line"><a name="l00344"></a><span class="lineno"> 344</span>  <span class="keywordflow">return</span> <a class="code" href="classentt_1_1basic__storage.html">storage</a>.<a class="code" href="classentt_1_1basic__sparse__set.html#a3617c860500230b880f07215f21cb496">empty</a>();</div>
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<div class="line"><a name="l00345"></a><span class="lineno"> 345</span>  }</div>
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<div class="line"><a name="l00346"></a><span class="lineno"> 346</span>  </div>
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<div class="line"><a name="l00359"></a><span class="lineno"><a class="line" href="classentt_1_1basic__observer.html#a9bbec438ee2735301a47725e0c137187"> 359</a></span>  [[nodiscard]] <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#a9bbec438ee2735301a47725e0c137187">data</a>() const ENTT_NOEXCEPT {</div>
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<div class="line"><a name="l00360"></a><span class="lineno"> 360</span>  <span class="keywordflow">return</span> <a class="code" href="classentt_1_1basic__storage.html">storage</a>.<a class="code" href="classentt_1_1basic__sparse__set.html#adaa8a3f16cdaa2d85316683d008bf8c5">data</a>();</div>
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<div class="line"><a name="l00361"></a><span class="lineno"> 361</span>  }</div>
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<div class="line"><a name="l00362"></a><span class="lineno"> 362</span>  </div>
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<div class="line"><a name="l00371"></a><span class="lineno"><a class="line" href="classentt_1_1basic__observer.html#a2067fca77f219bea0b5a341583a1544f"> 371</a></span>  [[nodiscard]] <a class="code" href="classentt_1_1basic__observer.html#a3b57e5efae80301542b1b4011debb680">iterator</a> <a class="code" href="classentt_1_1basic__observer.html#a2067fca77f219bea0b5a341583a1544f">begin</a>() const ENTT_NOEXCEPT {</div>
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<div class="line"><a name="l00372"></a><span class="lineno"> 372</span>  <span class="keywordflow">return</span> <a class="code" href="classentt_1_1basic__storage.html">storage</a>.basic_sparse_set<entity_type>::begin();</div>
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<div class="line"><a name="l00373"></a><span class="lineno"> 373</span>  }</div>
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<div class="line"><a name="l00374"></a><span class="lineno"> 374</span>  </div>
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<div class="line"><a name="l00385"></a><span class="lineno"><a class="line" href="classentt_1_1basic__observer.html#a730adbbd4f425bbf9d69b8bb4a0e2ac2"> 385</a></span>  [[nodiscard]] <a class="code" href="classentt_1_1basic__observer.html#a3b57e5efae80301542b1b4011debb680">iterator</a> <a class="code" href="classentt_1_1basic__observer.html#a730adbbd4f425bbf9d69b8bb4a0e2ac2">end</a>() const ENTT_NOEXCEPT {</div>
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<div class="line"><a name="l00386"></a><span class="lineno"> 386</span>  <span class="keywordflow">return</span> <a class="code" href="classentt_1_1basic__storage.html">storage</a>.basic_sparse_set<entity_type>::end();</div>
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<div class="line"><a name="l00387"></a><span class="lineno"> 387</span>  }</div>
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<div class="line"><a name="l00388"></a><span class="lineno"> 388</span>  </div>
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<div class="line"><a name="l00390"></a><span class="lineno"><a class="line" href="classentt_1_1basic__observer.html#ade730cb09309ed7077616a908b25c2e7"> 390</a></span>  <span class="keywordtype">void</span> <a class="code" href="classentt_1_1basic__observer.html#ade730cb09309ed7077616a908b25c2e7">clear</a>() ENTT_NOEXCEPT {</div>
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<div class="line"><a name="l00391"></a><span class="lineno"> 391</span>  <a class="code" href="classentt_1_1basic__storage.html">storage</a>.<a class="code" href="classentt_1_1basic__sparse__set.html#a6560773b887906122d50a413aea1faad">clear</a>();</div>
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<div class="line"><a name="l00392"></a><span class="lineno"> 392</span>  }</div>
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<div class="line"><a name="l00393"></a><span class="lineno"> 393</span>  </div>
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<div class="line"><a name="l00407"></a><span class="lineno"> 407</span>  <span class="keyword">template</span><<span class="keyword">typename</span> Func></div>
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<div class="line"><a name="l00408"></a><span class="lineno"><a class="line" href="classentt_1_1basic__observer.html#a181a6724835a3a41e33610003f738525"> 408</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>
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<div class="line"><a name="l00409"></a><span class="lineno"> 409</span>  <span class="keywordflow">for</span>(<span class="keyword">const</span> <span class="keyword">auto</span> <a class="code" href="namespaceentt.html#a0b54e231d069e8a231e14b223388808a">entity</a>: *<span class="keyword">this</span>) {</div>
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<div class="line"><a name="l00410"></a><span class="lineno"> 410</span>  func(<a class="code" href="namespaceentt.html#a0b54e231d069e8a231e14b223388808a">entity</a>);</div>
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<div class="line"><a name="l00411"></a><span class="lineno"> 411</span>  }</div>
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<div class="line"><a name="l00412"></a><span class="lineno"> 412</span>  }</div>
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<div class="line"><a name="l00413"></a><span class="lineno"> 413</span>  </div>
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<div class="line"><a name="l00423"></a><span class="lineno"> 423</span>  <span class="keyword">template</span><<span class="keyword">typename</span> Func></div>
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<div class="line"><a name="l00424"></a><span class="lineno"><a class="line" href="classentt_1_1basic__observer.html#a535f3ddf32641a54e1c8861519933c97"> 424</a></span>  <span class="keywordtype">void</span> <a class="code" href="classentt_1_1basic__observer.html#a535f3ddf32641a54e1c8861519933c97">each</a>(Func func) {</div>
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<div class="line"><a name="l00425"></a><span class="lineno"> 425</span>  std::as_const(*this).each(std::move(func));</div>
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<div class="line"><a name="l00426"></a><span class="lineno"> 426</span>  <a class="code" href="classentt_1_1basic__observer.html#ade730cb09309ed7077616a908b25c2e7">clear</a>();</div>
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<div class="line"><a name="l00427"></a><span class="lineno"> 427</span>  }</div>
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<div class="line"><a name="l00428"></a><span class="lineno"> 428</span>  </div>
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<div class="line"><a name="l00429"></a><span class="lineno"> 429</span> <span class="keyword">private</span>:</div>
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<div class="line"><a name="l00430"></a><span class="lineno"> 430</span>  <a class="code" href="classentt_1_1delegate.html">delegate</a><void(<a class="code" href="classentt_1_1basic__observer.html">basic_observer</a> &)> release;</div>
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<div class="line"><a name="l00431"></a><span class="lineno"> 431</span>  <a class="code" href="classentt_1_1basic__storage.html">basic_storage<entity_type, payload_type></a> <a class="code" href="classentt_1_1basic__storage.html">storage</a>;</div>
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<div class="line"><a name="l00432"></a><span class="lineno"> 432</span> };</div>
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<div class="line"><a name="l00433"></a><span class="lineno"> 433</span>  </div>
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<div class="line"><a name="l00434"></a><span class="lineno"> 434</span> } <span class="comment">// namespace entt</span></div>
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<div class="line"><a name="l00435"></a><span class="lineno"> 435</span>  </div>
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<div class="line"><a name="l00436"></a><span class="lineno"> 436</span> <span class="preprocessor">#endif</span></div>
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<div class="ttc" id="aclassentt_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="observer_8hpp_source.html#l00165">observer.hpp:165</a></div></div>
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<div class="ttc" id="aclassentt_1_1basic__observer_html_a03dcb6b0999d29bc39410d7ae6d9ac53"><div class="ttname"><a href="classentt_1_1basic__observer.html#a03dcb6b0999d29bc39410d7ae6d9ac53">entt::basic_observer::operator=</a></div><div class="ttdeci">basic_observer & operator=(const basic_observer &)=delete</div><div class="ttdoc">Default copy assignment operator, deleted on purpose.</div></div>
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<div class="ttc" id="aclassentt_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#l00324">observer.hpp:324</a></div></div>
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<div class="ttc" id="aclassentt_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#l00271">observer.hpp:271</a></div></div>
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<div class="ttc" id="aclassentt_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.</div><div class="ttdef"><b>Definition:</b> <a href="observer_8hpp_source.html#l00408">observer.hpp:408</a></div></div>
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<div class="ttc" id="aclassentt_1_1basic__observer_html_a2067fca77f219bea0b5a341583a1544f"><div class="ttname"><a href="classentt_1_1basic__observer.html#a2067fca77f219bea0b5a341583a1544f">entt::basic_observer::begin</a></div><div class="ttdeci">iterator begin() const</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#l00371">observer.hpp:371</a></div></div>
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<div class="ttc" id="aclassentt_1_1basic__observer_html_a3b57e5efae80301542b1b4011debb680"><div class="ttname"><a href="classentt_1_1basic__observer.html#a3b57e5efae80301542b1b4011debb680">entt::basic_observer::iterator</a></div><div class="ttdeci">typename basic_sparse_set< Entity >::iterator iterator</div><div class="ttdoc">Random access iterator type.</div><div class="ttdef"><b>Definition:</b> <a href="observer_8hpp_source.html#l00273">observer.hpp:273</a></div></div>
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<div class="ttc" id="aclassentt_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#l00424">observer.hpp:424</a></div></div>
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<div class="ttc" id="aclassentt_1_1basic__observer_html_a591a0ed89d0b2cabfb51b729bfb33c3e"><div class="ttname"><a href="classentt_1_1basic__observer.html#a591a0ed89d0b2cabfb51b729bfb33c3e">entt::basic_observer::empty</a></div><div class="ttdeci">bool empty() const</div><div class="ttdoc">Checks whether an observer is empty.</div><div class="ttdef"><b>Definition:</b> <a href="observer_8hpp_source.html#l00343">observer.hpp:343</a></div></div>
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<div class="ttc" id="aclassentt_1_1basic__observer_html_a730adbbd4f425bbf9d69b8bb4a0e2ac2"><div class="ttname"><a href="classentt_1_1basic__observer.html#a730adbbd4f425bbf9d69b8bb4a0e2ac2">entt::basic_observer::end</a></div><div class="ttdeci">iterator end() const</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#l00385">observer.hpp:385</a></div></div>
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<div class="ttc" id="aclassentt_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#l00317">observer.hpp:317</a></div></div>
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<div class="ttc" id="aclassentt_1_1basic__observer_html_a8b7cd199f236a4dee02f202ec0fd6281"><div class="ttname"><a href="classentt_1_1basic__observer.html#a8b7cd199f236a4dee02f202ec0fd6281">entt::basic_observer::operator=</a></div><div class="ttdeci">basic_observer & operator=(basic_observer &&)=delete</div><div class="ttdoc">Default move assignment operator, deleted on purpose.</div></div>
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<div class="ttc" id="aclassentt_1_1basic__observer_html_a9bbec438ee2735301a47725e0c137187"><div class="ttname"><a href="classentt_1_1basic__observer.html#a9bbec438ee2735301a47725e0c137187">entt::basic_observer::data</a></div><div class="ttdeci">const entity_type * data() const</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#l00359">observer.hpp:359</a></div></div>
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<div class="ttc" id="aclassentt_1_1basic__observer_html_aa685204c94266b5631c13540012e73c2"><div class="ttname"><a href="classentt_1_1basic__observer.html#aa685204c94266b5631c13540012e73c2">entt::basic_observer::basic_observer</a></div><div class="ttdeci">basic_observer(const basic_observer &)=delete</div><div class="ttdoc">Default copy constructor, deleted on purpose.</div></div>
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<div class="ttc" id="aclassentt_1_1basic__observer_html_aae9024a8c5b14adfe90690a56fa09935"><div class="ttname"><a href="classentt_1_1basic__observer.html#aae9024a8c5b14adfe90690a56fa09935">entt::basic_observer::size</a></div><div class="ttdeci">size_type size() const</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#l00335">observer.hpp:335</a></div></div>
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<div class="ttc" id="aclassentt_1_1basic__observer_html_abef3c847acf610f1a6f856b05f0f0721"><div class="ttname"><a href="classentt_1_1basic__observer.html#abef3c847acf610f1a6f856b05f0f0721">entt::basic_observer::basic_observer</a></div><div class="ttdeci">basic_observer(basic_registry< entity_type > &reg, basic_collector< Matcher... >)</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#l00291">observer.hpp:291</a></div></div>
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<div class="ttc" id="aclassentt_1_1basic__observer_html_accbe2546b1b74de1a59e673cb6250413"><div class="ttname"><a href="classentt_1_1basic__observer.html#accbe2546b1b74de1a59e673cb6250413">entt::basic_observer::basic_observer</a></div><div class="ttdeci">basic_observer(basic_observer &&)=delete</div><div class="ttdoc">Default move constructor, deleted on purpose.</div></div>
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<div class="ttc" id="aclassentt_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">Clears the underlying container.</div><div class="ttdef"><b>Definition:</b> <a href="observer_8hpp_source.html#l00390">observer.hpp:390</a></div></div>
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<div class="ttc" id="aclassentt_1_1basic__observer_html_adfb08de0ef1c0f57fadc6f6d171b931a"><div class="ttname"><a href="classentt_1_1basic__observer.html#adfb08de0ef1c0f57fadc6f6d171b931a">entt::basic_observer::basic_observer</a></div><div class="ttdeci">basic_observer()</div><div class="ttdoc">Default constructor.</div><div class="ttdef"><b>Definition:</b> <a href="observer_8hpp_source.html#l00276">observer.hpp:276</a></div></div>
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<div class="ttc" id="aclassentt_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#l00269">observer.hpp:269</a></div></div>
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<div class="ttc" id="aclassentt_1_1basic__observer_html_afb6fbd2a5ce7bc57013b0bd9ad482599"><div class="ttname"><a href="classentt_1_1basic__observer.html#afb6fbd2a5ce7bc57013b0bd9ad482599">entt::basic_observer::~basic_observer</a></div><div class="ttdeci">~basic_observer()=default</div><div class="ttdoc">Default destructor.</div></div>
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<div class="ttc" id="aclassentt_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="registry_8hpp_source.html#l00221">registry.hpp:221</a></div></div>
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<div class="ttc" id="aclassentt_1_1basic__sparse__set_html_a0a41589e81003ca86b8a6104842680cb"><div class="ttname"><a href="classentt_1_1basic__sparse__set.html#a0a41589e81003ca86b8a6104842680cb">entt::basic_sparse_set::erase</a></div><div class="ttdeci">void erase(const entity_type entt)</div><div class="ttdoc">Erases an entity from a sparse set.</div><div class="ttdef"><b>Definition:</b> <a href="sparse__set_8hpp_source.html#l00710">sparse_set.hpp:710</a></div></div>
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<div class="ttc" id="aclassentt_1_1basic__sparse__set_html_a3617c860500230b880f07215f21cb496"><div class="ttname"><a href="classentt_1_1basic__sparse__set.html#a3617c860500230b880f07215f21cb496">entt::basic_sparse_set::empty</a></div><div class="ttdeci">bool empty() const</div><div class="ttdoc">Checks whether a sparse set is empty.</div><div class="ttdef"><b>Definition:</b> <a href="sparse__set_8hpp_source.html#l00473">sparse_set.hpp:473</a></div></div>
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<div class="ttc" id="aclassentt_1_1basic__sparse__set_html_a6560773b887906122d50a413aea1faad"><div class="ttname"><a href="classentt_1_1basic__sparse__set.html#a6560773b887906122d50a413aea1faad">entt::basic_sparse_set::clear</a></div><div class="ttdeci">void clear()</div><div class="ttdoc">Clears a sparse set.</div><div class="ttdef"><b>Definition:</b> <a href="sparse__set_8hpp_source.html#l00922">sparse_set.hpp:922</a></div></div>
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<div class="ttc" id="aclassentt_1_1basic__sparse__set_html_a6cea231ae7386a12487164d918f632b0"><div class="ttname"><a href="classentt_1_1basic__sparse__set.html#a6cea231ae7386a12487164d918f632b0">entt::basic_sparse_set::iterator</a></div><div class="ttdeci">basic_iterator iterator</div><div class="ttdoc">Random access iterator type.</div><div class="ttdef"><b>Definition:</b> <a href="sparse__set_8hpp_source.html#l00298">sparse_set.hpp:298</a></div></div>
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<div class="ttc" id="aclassentt_1_1basic__sparse__set_html_a781b6cee81c02b5dd601d0c808cf97a8"><div class="ttname"><a href="classentt_1_1basic__sparse__set.html#a781b6cee81c02b5dd601d0c808cf97a8">entt::basic_sparse_set::size</a></div><div class="ttdeci">size_type size() const</div><div class="ttdoc">Returns the number of elements in a sparse set.</div><div class="ttdef"><b>Definition:</b> <a href="sparse__set_8hpp_source.html#l00465">sparse_set.hpp:465</a></div></div>
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<div class="ttc" id="aclassentt_1_1basic__sparse__set_html_ad2c7f1ac19e1040c2c2d2245f521f291"><div class="ttname"><a href="classentt_1_1basic__sparse__set.html#ad2c7f1ac19e1040c2c2d2245f521f291">entt::basic_sparse_set::contains</a></div><div class="ttdeci">bool contains(const entity_type entt) const</div><div class="ttdoc">Checks if a sparse set contains an entity.</div><div class="ttdef"><b>Definition:</b> <a href="sparse__set_8hpp_source.html#l00576">sparse_set.hpp:576</a></div></div>
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<div class="ttc" id="aclassentt_1_1basic__sparse__set_html_adaa8a3f16cdaa2d85316683d008bf8c5"><div class="ttname"><a href="classentt_1_1basic__sparse__set.html#adaa8a3f16cdaa2d85316683d008bf8c5">entt::basic_sparse_set::data</a></div><div class="ttdeci">pointer data() const</div><div class="ttdoc">Direct access to the internal packed array.</div><div class="ttdef"><b>Definition:</b> <a href="sparse__set_8hpp_source.html#l00481">sparse_set.hpp:481</a></div></div>
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<div class="ttc" id="aclassentt_1_1basic__storage_html"><div class="ttname"><a href="classentt_1_1basic__storage.html">entt::basic_storage</a></div><div class="ttdoc">Basic storage implementation.</div><div class="ttdef"><b>Definition:</b> <a href="storage_8hpp_source.html#l00234">storage.hpp:234</a></div></div>
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<div class="ttc" id="aclassentt_1_1basic__storage_html_a7e6c99b2c108586141a75145748b2e8d"><div class="ttname"><a href="classentt_1_1basic__storage.html#a7e6c99b2c108586141a75145748b2e8d">entt::basic_storage::emplace</a></div><div class="ttdeci">value_type & emplace(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#l00661">storage.hpp:661</a></div></div>
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<div class="ttc" id="aclassentt_1_1basic__storage_html_afdb98de467567bf81772382ba2970413"><div class="ttname"><a href="classentt_1_1basic__storage.html#afdb98de467567bf81772382ba2970413">entt::basic_storage::get</a></div><div class="ttdeci">const value_type & get(const entity_type entt) const</div><div class="ttdoc">Returns the object assigned to an entity.</div><div class="ttdef"><b>Definition:</b> <a href="storage_8hpp_source.html#l00625">storage.hpp:625</a></div></div>
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<div class="ttc" id="aclassentt_1_1delegate_html"><div class="ttname"><a href="classentt_1_1delegate.html">entt::delegate</a></div><div class="ttdoc">Basic delegate implementation.</div><div class="ttdef"><b>Definition:</b> <a href="delegate_8hpp_source.html#l00067">delegate.hpp:67</a></div></div>
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<div class="ttc" id="anamespaceentt_html"><div class="ttname"><a href="namespaceentt.html">entt</a></div><div class="ttdoc">EnTT default namespace.</div><div class="ttdef"><b>Definition:</b> <a href="dense__map_8hpp_source.html#l00022">dense_map.hpp:22</a></div></div>
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<div class="ttc" id="anamespaceentt_html_a0b54e231d069e8a231e14b223388808a"><div class="ttname"><a href="namespaceentt.html#a0b54e231d069e8a231e14b223388808a">entt::entity</a></div><div class="ttdeci">entity</div><div class="ttdoc">Default entity identifier.</div><div class="ttdef"><b>Definition:</b> <a href="entity_2fwd_8hpp_source.html#l00047">fwd.hpp:47</a></div></div>
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<div class="ttc" id="anamespaceentt_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#l00113">observer.hpp:113</a></div></div>
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<div class="ttc" id="astructentt_1_1basic__collector_3_01matcher_3_01type__list_3_01Reject_8_8_8_01_4_00_01type__list_98a79514dcad34a82f321f0796064ffb_html_a21c361071415791fd940201a685b938e"><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#a21c361071415791fd940201a685b938e">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... >={})</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#l00106">observer.hpp:106</a></div></div>
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<div class="ttc" id="astructentt_1_1basic__collector_3_01matcher_3_01type__list_3_01Reject_8_8_8_01_4_00_01type__list_98a79514dcad34a82f321f0796064ffb_html_a72c0576faa0e9a418fa72fd25987b9f4"><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#a72c0576faa0e9a418fa72fd25987b9f4">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... >={})</div><div class="ttdoc">Adds a grouping matcher to the collector.</div><div class="ttdef"><b>Definition:</b> <a href="observer_8hpp_source.html#l00085">observer.hpp:85</a></div></div>
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<div class="ttc" id="astructentt_1_1basic__collector_3_01matcher_3_01type__list_3_01Reject_8_8_8_01_4_00_01type__list_98a79514dcad34a82f321f0796064ffb_html_ac8bd4af93eec6631c6b3a56353d8b615"><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#ac8bd4af93eec6631c6b3a56353d8b615">entt::basic_collector< matcher< type_list< Reject... >, type_list< Require... >, Rule... >, Other... >::update</a></div><div class="ttdeci">static constexpr auto update()</div><div class="ttdoc">Adds an observing matcher to the collector.</div><div class="ttdef"><b>Definition:</b> <a href="observer_8hpp_source.html#l00095">observer.hpp:95</a></div></div>
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<div class="ttc" id="astructentt_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#l00042">observer.hpp:42</a></div></div>
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<div class="ttc" id="astructentt_1_1basic__collector_3_4_html_a40cd31653a616e0e87a6f9d840c36d5d"><div class="ttname"><a href="structentt_1_1basic__collector_3_4.html#a40cd31653a616e0e87a6f9d840c36d5d">entt::basic_collector<>::group</a></div><div class="ttdeci">static constexpr auto group(exclude_t< NoneOf... >={})</div><div class="ttdoc">Adds a grouping matcher to the collector.</div><div class="ttdef"><b>Definition:</b> <a href="observer_8hpp_source.html#l00050">observer.hpp:50</a></div></div>
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<div class="ttc" id="astructentt_1_1basic__collector_3_4_html_af84fbd53436ec60b1e158b3d685a91d9"><div class="ttname"><a href="structentt_1_1basic__collector_3_4.html#af84fbd53436ec60b1e158b3d685a91d9">entt::basic_collector<>::update</a></div><div class="ttdeci">static constexpr auto update()</div><div class="ttdoc">Adds an observing matcher to the collector.</div><div class="ttdef"><b>Definition:</b> <a href="observer_8hpp_source.html#l00060">observer.hpp:60</a></div></div>
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<div class="ttc" id="astructentt_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#l00031">observer.hpp:31</a></div></div>
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<div class="ttc" id="astructentt_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#l00013">utility.hpp:13</a></div></div>
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<div class="ttc" id="astructentt_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#l00022">observer.hpp:22</a></div></div>
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<div class="ttc" id="astructentt_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="core_2type__traits_8hpp_source.html#l00110">type_traits.hpp:110</a></div></div>
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