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293 lines
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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_a53318306f6ac0f7fe657839abd543ab.html">signal</a></li> </ul>
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<div class="title">emitter.hpp</div> </div>
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<div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="preprocessor">#ifndef ENTT_SIGNAL_EMITTER_HPP</span></div>
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<div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="preprocessor">#define ENTT_SIGNAL_EMITTER_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 <algorithm></span></div>
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<div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="preprocessor">#include <functional></span></div>
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<div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="preprocessor">#include <iterator></span></div>
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<div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="preprocessor">#include <list></span></div>
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<div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="preprocessor">#include <memory></span></div>
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<div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="preprocessor">#include <type_traits></span></div>
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<div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="preprocessor">#include <utility></span></div>
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<div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="preprocessor">#include "../config/config.h"</span></div>
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<div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="preprocessor">#include "../container/dense_hash_map.hpp"</span></div>
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<div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="preprocessor">#include "../core/fwd.hpp"</span></div>
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<div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="preprocessor">#include "../core/type_info.hpp"</span></div>
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<div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="preprocessor">#include "../core/utility.hpp"</span></div>
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<div class="line"><a name="l00016"></a><span class="lineno"> 16</span>  </div>
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<div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="keyword">namespace </span><a class="code" href="namespaceentt.html">entt</a> {</div>
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<div class="line"><a name="l00018"></a><span class="lineno"> 18</span>  </div>
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<div class="line"><a name="l00040"></a><span class="lineno"> 40</span> <span class="keyword">template</span><<span class="keyword">typename</span> Derived></div>
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<div class="line"><a name="l00041"></a><span class="lineno"><a class="line" href="classentt_1_1emitter.html"> 41</a></span> <span class="keyword">class </span><a class="code" href="classentt_1_1emitter.html">emitter</a> {</div>
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<div class="line"><a name="l00042"></a><span class="lineno"> 42</span>  <span class="keyword">struct </span>basic_pool {</div>
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<div class="line"><a name="l00043"></a><span class="lineno"> 43</span>  <span class="keyword">virtual</span> ~basic_pool() = <span class="keywordflow">default</span>;</div>
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<div class="line"><a name="l00044"></a><span class="lineno"> 44</span>  <span class="keyword">virtual</span> <span class="keywordtype">bool</span> <a class="code" href="classentt_1_1emitter.html#a08c6111af231c9a82277069a3bf21b75">empty</a>() <span class="keyword">const</span> ENTT_NOEXCEPT = 0;</div>
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<div class="line"><a name="l00045"></a><span class="lineno"> 45</span>  <span class="keyword">virtual</span> <span class="keywordtype">void</span> <a class="code" href="classentt_1_1emitter.html#a4e4324c59afee760ca13772eb6d2d522">clear</a>() ENTT_NOEXCEPT = 0;</div>
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<div class="line"><a name="l00046"></a><span class="lineno"> 46</span>  };</div>
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<div class="line"><a name="l00047"></a><span class="lineno"> 47</span>  </div>
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<div class="line"><a name="l00048"></a><span class="lineno"> 48</span>  <span class="keyword">template</span><<span class="keyword">typename</span> Event></div>
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<div class="line"><a name="l00049"></a><span class="lineno"> 49</span>  <span class="keyword">struct </span>pool_handler final: basic_pool {</div>
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<div class="line"><a name="l00050"></a><span class="lineno"> 50</span>  static_assert(std::is_same_v<Event, std::decay_t<Event>>, <span class="stringliteral">"Invalid event type"</span>);</div>
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<div class="line"><a name="l00051"></a><span class="lineno"> 51</span>  </div>
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<div class="line"><a name="l00052"></a><span class="lineno"> 52</span>  <span class="keyword">using</span> listener_type = std::function<void(Event &, Derived &)>;</div>
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<div class="line"><a name="l00053"></a><span class="lineno"> 53</span>  <span class="keyword">using</span> element_type = std::pair<bool, listener_type>;</div>
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<div class="line"><a name="l00054"></a><span class="lineno"> 54</span>  <span class="keyword">using</span> container_type = std::list<element_type>;</div>
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<div class="line"><a name="l00055"></a><span class="lineno"> 55</span>  <span class="keyword">using</span> connection_type = <span class="keyword">typename</span> container_type::iterator;</div>
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<div class="line"><a name="l00056"></a><span class="lineno"> 56</span>  </div>
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<div class="line"><a name="l00057"></a><span class="lineno"> 57</span>  [[nodiscard]] <span class="keywordtype">bool</span> <a class="code" href="classentt_1_1emitter.html#a08c6111af231c9a82277069a3bf21b75">empty</a>() <span class="keyword">const</span> ENTT_NOEXCEPT <span class="keyword">override</span> {</div>
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<div class="line"><a name="l00058"></a><span class="lineno"> 58</span>  <span class="keyword">auto</span> pred = [](<span class="keyword">auto</span> &&element) { <span class="keywordflow">return</span> element.first; };</div>
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<div class="line"><a name="l00059"></a><span class="lineno"> 59</span>  </div>
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<div class="line"><a name="l00060"></a><span class="lineno"> 60</span>  <span class="keywordflow">return</span> std::all_of(once_list.cbegin(), once_list.cend(), pred)</div>
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<div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  && std::all_of(on_list.cbegin(), on_list.cend(), pred);</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>  <span class="keywordtype">void</span> <a class="code" href="classentt_1_1emitter.html#a4e4324c59afee760ca13772eb6d2d522">clear</a>() ENTT_NOEXCEPT <span class="keyword">override</span> {</div>
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<div class="line"><a name="l00065"></a><span class="lineno"> 65</span>  <span class="keywordflow">if</span>(publishing) {</div>
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<div class="line"><a name="l00066"></a><span class="lineno"> 66</span>  <span class="keywordflow">for</span>(<span class="keyword">auto</span> &&element: once_list) {</div>
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<div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  element.first = <span class="keyword">true</span>;</div>
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<div class="line"><a name="l00068"></a><span class="lineno"> 68</span>  }</div>
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<div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  </div>
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<div class="line"><a name="l00070"></a><span class="lineno"> 70</span>  <span class="keywordflow">for</span>(<span class="keyword">auto</span> &&element: on_list) {</div>
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<div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  element.first = <span class="keyword">true</span>;</div>
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<div class="line"><a name="l00072"></a><span class="lineno"> 72</span>  }</div>
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<div class="line"><a name="l00073"></a><span class="lineno"> 73</span>  } <span class="keywordflow">else</span> {</div>
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<div class="line"><a name="l00074"></a><span class="lineno"> 74</span>  once_list.clear();</div>
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<div class="line"><a name="l00075"></a><span class="lineno"> 75</span>  on_list.clear();</div>
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<div class="line"><a name="l00076"></a><span class="lineno"> 76</span>  }</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="l00078"></a><span class="lineno"> 78</span>  </div>
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<div class="line"><a name="l00079"></a><span class="lineno"> 79</span>  connection_type <a class="code" href="classentt_1_1emitter.html#a79834d452b0600ebe0e70c54f4a21fd6">once</a>(listener_type <a class="code" href="classentt_1_1emitter.html#a1200216d9abb1adb18db6035d99b60da">listener</a>) {</div>
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<div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  <span class="keywordflow">return</span> once_list.emplace(once_list.cend(), <span class="keyword">false</span>, std::move(<a class="code" href="classentt_1_1emitter.html#a1200216d9abb1adb18db6035d99b60da">listener</a>));</div>
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<div class="line"><a name="l00081"></a><span class="lineno"> 81</span>  }</div>
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<div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  </div>
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<div class="line"><a name="l00083"></a><span class="lineno"> 83</span>  connection_type <a class="code" href="classentt_1_1emitter.html#a0b580005200bb810a4a3e94320efcd8a">on</a>(listener_type <a class="code" href="classentt_1_1emitter.html#a1200216d9abb1adb18db6035d99b60da">listener</a>) {</div>
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<div class="line"><a name="l00084"></a><span class="lineno"> 84</span>  <span class="keywordflow">return</span> on_list.emplace(on_list.cend(), <span class="keyword">false</span>, std::move(<a class="code" href="classentt_1_1emitter.html#a1200216d9abb1adb18db6035d99b60da">listener</a>));</div>
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<div class="line"><a name="l00085"></a><span class="lineno"> 85</span>  }</div>
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<div class="line"><a name="l00086"></a><span class="lineno"> 86</span>  </div>
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<div class="line"><a name="l00087"></a><span class="lineno"> 87</span>  <span class="keywordtype">void</span> <a class="code" href="classentt_1_1emitter.html#a9525364769b8daf55dd942599aa0a09c">erase</a>(connection_type conn) {</div>
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<div class="line"><a name="l00088"></a><span class="lineno"> 88</span>  conn->first = <span class="keyword">true</span>;</div>
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<div class="line"><a name="l00089"></a><span class="lineno"> 89</span>  </div>
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<div class="line"><a name="l00090"></a><span class="lineno"> 90</span>  <span class="keywordflow">if</span>(!publishing) {</div>
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<div class="line"><a name="l00091"></a><span class="lineno"> 91</span>  <span class="keyword">auto</span> pred = [](<span class="keyword">auto</span> &&element) { <span class="keywordflow">return</span> element.first; };</div>
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<div class="line"><a name="l00092"></a><span class="lineno"> 92</span>  once_list.remove_if(pred);</div>
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<div class="line"><a name="l00093"></a><span class="lineno"> 93</span>  on_list.remove_if(pred);</div>
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<div class="line"><a name="l00094"></a><span class="lineno"> 94</span>  }</div>
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<div class="line"><a name="l00095"></a><span class="lineno"> 95</span>  }</div>
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<div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  </div>
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<div class="line"><a name="l00097"></a><span class="lineno"> 97</span>  <span class="keywordtype">void</span> <a class="code" href="classentt_1_1emitter.html#ad2877515662e6fce3558688b4fd598aa">publish</a>(Event &event, Derived &ref) {</div>
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<div class="line"><a name="l00098"></a><span class="lineno"> 98</span>  container_type swap_list;</div>
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<div class="line"><a name="l00099"></a><span class="lineno"> 99</span>  once_list.swap(swap_list);</div>
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<div class="line"><a name="l00100"></a><span class="lineno"> 100</span>  </div>
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<div class="line"><a name="l00101"></a><span class="lineno"> 101</span>  publishing = <span class="keyword">true</span>;</div>
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<div class="line"><a name="l00102"></a><span class="lineno"> 102</span>  </div>
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<div class="line"><a name="l00103"></a><span class="lineno"> 103</span>  <span class="keywordflow">for</span>(<span class="keyword">auto</span> &&element: on_list) {</div>
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<div class="line"><a name="l00104"></a><span class="lineno"> 104</span>  element.first ? void() : element.second(event, ref);</div>
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<div class="line"><a name="l00105"></a><span class="lineno"> 105</span>  }</div>
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<div class="line"><a name="l00106"></a><span class="lineno"> 106</span>  </div>
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<div class="line"><a name="l00107"></a><span class="lineno"> 107</span>  <span class="keywordflow">for</span>(<span class="keyword">auto</span> &&element: swap_list) {</div>
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<div class="line"><a name="l00108"></a><span class="lineno"> 108</span>  element.first ? void() : element.second(event, ref);</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>  publishing = <span class="keyword">false</span>;</div>
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<div class="line"><a name="l00112"></a><span class="lineno"> 112</span>  </div>
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<div class="line"><a name="l00113"></a><span class="lineno"> 113</span>  on_list.remove_if([](<span class="keyword">auto</span> &&element) { <span class="keywordflow">return</span> element.first; });</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="l00115"></a><span class="lineno"> 115</span>  </div>
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<div class="line"><a name="l00116"></a><span class="lineno"> 116</span>  <span class="keyword">private</span>:</div>
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<div class="line"><a name="l00117"></a><span class="lineno"> 117</span>  <span class="keywordtype">bool</span> publishing{<span class="keyword">false</span>};</div>
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<div class="line"><a name="l00118"></a><span class="lineno"> 118</span>  container_type once_list{};</div>
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<div class="line"><a name="l00119"></a><span class="lineno"> 119</span>  container_type on_list{};</div>
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<div class="line"><a name="l00120"></a><span class="lineno"> 120</span>  };</div>
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<div class="line"><a name="l00121"></a><span class="lineno"> 121</span>  </div>
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<div class="line"><a name="l00122"></a><span class="lineno"> 122</span>  <span class="keyword">template</span><<span class="keyword">typename</span> Event></div>
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<div class="line"><a name="l00123"></a><span class="lineno"> 123</span>  [[nodiscard]] pool_handler<Event> *assure() {</div>
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<div class="line"><a name="l00124"></a><span class="lineno"> 124</span>  <span class="keywordflow">if</span>(<span class="keyword">auto</span> &&ptr = pools[<a class="code" href="structentt_1_1type__hash.html">type_hash<Event>::value</a>()]; !ptr) {</div>
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<div class="line"><a name="l00125"></a><span class="lineno"> 125</span>  <span class="keyword">auto</span> *cpool = <span class="keyword">new</span> pool_handler<Event>{};</div>
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<div class="line"><a name="l00126"></a><span class="lineno"> 126</span>  ptr.reset(cpool);</div>
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<div class="line"><a name="l00127"></a><span class="lineno"> 127</span>  <span class="keywordflow">return</span> cpool;</div>
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<div class="line"><a name="l00128"></a><span class="lineno"> 128</span>  } <span class="keywordflow">else</span> {</div>
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<div class="line"><a name="l00129"></a><span class="lineno"> 129</span>  <span class="keywordflow">return</span> <span class="keyword">static_cast<</span>pool_handler<Event> *<span class="keyword">></span>(ptr.get());</div>
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<div class="line"><a name="l00130"></a><span class="lineno"> 130</span>  }</div>
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<div class="line"><a name="l00131"></a><span class="lineno"> 131</span>  }</div>
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<div class="line"><a name="l00132"></a><span class="lineno"> 132</span>  </div>
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<div class="line"><a name="l00133"></a><span class="lineno"> 133</span>  <span class="keyword">template</span><<span class="keyword">typename</span> Event></div>
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<div class="line"><a name="l00134"></a><span class="lineno"> 134</span>  [[nodiscard]] <span class="keyword">const</span> pool_handler<Event> *assure()<span class="keyword"> const </span>{</div>
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<div class="line"><a name="l00135"></a><span class="lineno"> 135</span>  <span class="keyword">const</span> <span class="keyword">auto</span> it = pools.find(<a class="code" href="structentt_1_1type__hash.html">type_hash<Event>::value</a>());</div>
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<div class="line"><a name="l00136"></a><span class="lineno"> 136</span>  <span class="keywordflow">return</span> (it == pools.cend()) ? nullptr : <span class="keyword">static_cast<</span><span class="keyword">const </span>pool_handler<Event> *<span class="keyword">></span>(it->second.get());</div>
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<div class="line"><a name="l00137"></a><span class="lineno"> 137</span>  }</div>
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<div class="line"><a name="l00138"></a><span class="lineno"> 138</span>  </div>
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<div class="line"><a name="l00139"></a><span class="lineno"> 139</span> <span class="keyword">public</span>:</div>
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<div class="line"><a name="l00141"></a><span class="lineno"> 141</span>  <span class="keyword">template</span><<span class="keyword">typename</span> Event></div>
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<div class="line"><a name="l00142"></a><span class="lineno"><a class="line" href="classentt_1_1emitter.html#a1200216d9abb1adb18db6035d99b60da"> 142</a></span>  <span class="keyword">using</span> <a class="code" href="classentt_1_1emitter.html#a1200216d9abb1adb18db6035d99b60da">listener</a> = <span class="keyword">typename</span> pool_handler<Event>::listener_type;</div>
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<div class="line"><a name="l00143"></a><span class="lineno"> 143</span>  </div>
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<div class="line"><a name="l00153"></a><span class="lineno"> 153</span>  <span class="keyword">template</span><<span class="keyword">typename</span> Event></div>
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<div class="line"><a name="l00154"></a><span class="lineno"><a class="line" href="structentt_1_1emitter_1_1connection.html"> 154</a></span>  <span class="keyword">struct </span><a class="code" href="structentt_1_1emitter_1_1connection.html">connection</a>: <span class="keyword">private</span> pool_handler<Event>::connection_type {</div>
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<div class="line"><a name="l00156"></a><span class="lineno"><a class="line" href="structentt_1_1emitter_1_1connection.html#a0f3bb10ad57dc0e06298fc9ba38a7bd9"> 156</a></span>  <span class="keyword">friend</span> <span class="keyword">class </span><a class="code" href="classentt_1_1emitter.html">emitter</a>;</div>
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<div class="line"><a name="l00157"></a><span class="lineno"> 157</span>  </div>
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<div class="line"><a name="l00159"></a><span class="lineno"><a class="line" href="structentt_1_1emitter_1_1connection.html#a3dcb29742c6824dd28743eb0d896f9c3"> 159</a></span>  <a class="code" href="structentt_1_1emitter_1_1connection.html#a3dcb29742c6824dd28743eb0d896f9c3">connection</a>() = <span class="keywordflow">default</span>;</div>
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<div class="line"><a name="l00160"></a><span class="lineno"> 160</span>  </div>
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<div class="line"><a name="l00165"></a><span class="lineno"><a class="line" href="structentt_1_1emitter_1_1connection.html#a0fa687596e072155e92e586e9de089c3"> 165</a></span>  <a class="code" href="structentt_1_1emitter_1_1connection.html#a0fa687596e072155e92e586e9de089c3">connection</a>(<span class="keyword">typename</span> pool_handler<Event>::connection_type conn)</div>
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<div class="line"><a name="l00166"></a><span class="lineno"> 166</span>  : pool_handler<Event>::connection_type{std::move(conn)} {}</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>  </div>
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<div class="line"><a name="l00170"></a><span class="lineno"><a class="line" href="classentt_1_1emitter.html#af36907a2dc7cc0a6607533c67e072f92"> 170</a></span>  <a class="code" href="classentt_1_1emitter.html#af36907a2dc7cc0a6607533c67e072f92">emitter</a>() = <span class="keywordflow">default</span>;</div>
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<div class="line"><a name="l00171"></a><span class="lineno"> 171</span>  </div>
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<div class="line"><a name="l00173"></a><span class="lineno"><a class="line" href="classentt_1_1emitter.html#af3d352c547768be34f03f0fbfdd30b43"> 173</a></span>  <span class="keyword">virtual</span> <a class="code" href="classentt_1_1emitter.html#af3d352c547768be34f03f0fbfdd30b43">~emitter</a>() {</div>
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<div class="line"><a name="l00174"></a><span class="lineno"> 174</span>  static_assert(std::is_base_of_v<<a class="code" href="classentt_1_1emitter.html">emitter<Derived></a>, Derived>, <span class="stringliteral">"Incorrect use of the class template"</span>);</div>
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<div class="line"><a name="l00175"></a><span class="lineno"> 175</span>  }</div>
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<div class="line"><a name="l00176"></a><span class="lineno"> 176</span>  </div>
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<div class="line"><a name="l00178"></a><span class="lineno"><a class="line" href="classentt_1_1emitter.html#a842fef69b914a160b0bcc211bb77b27b"> 178</a></span>  <a class="code" href="classentt_1_1emitter.html#a842fef69b914a160b0bcc211bb77b27b">emitter</a>(<a class="code" href="classentt_1_1emitter.html">emitter</a> &&) = <span class="keywordflow">default</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="l00181"></a><span class="lineno"><a class="line" href="classentt_1_1emitter.html#ab270d2c6d986621a781467e29e64629c"> 181</a></span>  <a class="code" href="classentt_1_1emitter.html">emitter</a> &<a class="code" href="classentt_1_1emitter.html#ab270d2c6d986621a781467e29e64629c">operator=</a>(<a class="code" href="classentt_1_1emitter.html">emitter</a> &&) = <span class="keywordflow">default</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="l00194"></a><span class="lineno"> 194</span>  <span class="keyword">template</span><<span class="keyword">typename</span> Event, <span class="keyword">typename</span>... Args></div>
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<div class="line"><a name="l00195"></a><span class="lineno"><a class="line" href="classentt_1_1emitter.html#ad2877515662e6fce3558688b4fd598aa"> 195</a></span>  <span class="keywordtype">void</span> <a class="code" href="classentt_1_1emitter.html#ad2877515662e6fce3558688b4fd598aa">publish</a>(Args &&...args) {</div>
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<div class="line"><a name="l00196"></a><span class="lineno"> 196</span>  Event instance{std::forward<Args>(args)...};</div>
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<div class="line"><a name="l00197"></a><span class="lineno"> 197</span>  assure<Event>()->publish(instance, *<span class="keyword">static_cast<</span>Derived *<span class="keyword">></span>(<span class="keyword">this</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>  </div>
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<div class="line"><a name="l00220"></a><span class="lineno"> 220</span>  <span class="keyword">template</span><<span class="keyword">typename</span> Event></div>
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<div class="line"><a name="l00221"></a><span class="lineno"><a class="line" href="classentt_1_1emitter.html#a0b580005200bb810a4a3e94320efcd8a"> 221</a></span>  <a class="code" href="structentt_1_1emitter_1_1connection.html">connection<Event></a> <a class="code" href="classentt_1_1emitter.html#a0b580005200bb810a4a3e94320efcd8a">on</a>(<a class="code" href="classentt_1_1emitter.html#a1200216d9abb1adb18db6035d99b60da">listener<Event></a> instance) {</div>
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<div class="line"><a name="l00222"></a><span class="lineno"> 222</span>  <span class="keywordflow">return</span> assure<Event>()->on(std::move(instance));</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>  </div>
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<div class="line"><a name="l00245"></a><span class="lineno"> 245</span>  <span class="keyword">template</span><<span class="keyword">typename</span> Event></div>
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<div class="line"><a name="l00246"></a><span class="lineno"><a class="line" href="classentt_1_1emitter.html#a79834d452b0600ebe0e70c54f4a21fd6"> 246</a></span>  <a class="code" href="structentt_1_1emitter_1_1connection.html">connection<Event></a> <a class="code" href="classentt_1_1emitter.html#a79834d452b0600ebe0e70c54f4a21fd6">once</a>(<a class="code" href="classentt_1_1emitter.html#a1200216d9abb1adb18db6035d99b60da">listener<Event></a> instance) {</div>
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<div class="line"><a name="l00247"></a><span class="lineno"> 247</span>  <span class="keywordflow">return</span> assure<Event>()->once(std::move(instance));</div>
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<div class="line"><a name="l00248"></a><span class="lineno"> 248</span>  }</div>
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<div class="line"><a name="l00249"></a><span class="lineno"> 249</span>  </div>
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<div class="line"><a name="l00259"></a><span class="lineno"> 259</span>  <span class="keyword">template</span><<span class="keyword">typename</span> Event></div>
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<div class="line"><a name="l00260"></a><span class="lineno"><a class="line" href="classentt_1_1emitter.html#a9525364769b8daf55dd942599aa0a09c"> 260</a></span>  <span class="keywordtype">void</span> <a class="code" href="classentt_1_1emitter.html#a9525364769b8daf55dd942599aa0a09c">erase</a>(<a class="code" href="structentt_1_1emitter_1_1connection.html">connection<Event></a> conn) {</div>
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<div class="line"><a name="l00261"></a><span class="lineno"> 261</span>  assure<Event>()->erase(std::move(conn));</div>
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<div class="line"><a name="l00262"></a><span class="lineno"> 262</span>  }</div>
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<div class="line"><a name="l00263"></a><span class="lineno"> 263</span>  </div>
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<div class="line"><a name="l00272"></a><span class="lineno"> 272</span>  <span class="keyword">template</span><<span class="keyword">typename</span> Event></div>
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<div class="line"><a name="l00273"></a><span class="lineno"><a class="line" href="classentt_1_1emitter.html#a4e4324c59afee760ca13772eb6d2d522"> 273</a></span>  <span class="keywordtype">void</span> <a class="code" href="classentt_1_1emitter.html#a4e4324c59afee760ca13772eb6d2d522">clear</a>() {</div>
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<div class="line"><a name="l00274"></a><span class="lineno"> 274</span>  assure<Event>()->clear();</div>
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<div class="line"><a name="l00275"></a><span class="lineno"> 275</span>  }</div>
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<div class="line"><a name="l00276"></a><span class="lineno"> 276</span>  </div>
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<div class="line"><a name="l00283"></a><span class="lineno"><a class="line" href="classentt_1_1emitter.html#afed3485e23fdbb87d007208382428813"> 283</a></span>  <span class="keywordtype">void</span> <a class="code" href="classentt_1_1emitter.html#afed3485e23fdbb87d007208382428813">clear</a>() ENTT_NOEXCEPT {</div>
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<div class="line"><a name="l00284"></a><span class="lineno"> 284</span>  <span class="keywordflow">for</span>(<span class="keyword">auto</span> &&cpool: pools) {</div>
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<div class="line"><a name="l00285"></a><span class="lineno"> 285</span>  cpool.second->clear();</div>
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<div class="line"><a name="l00286"></a><span class="lineno"> 286</span>  }</div>
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<div class="line"><a name="l00287"></a><span class="lineno"> 287</span>  }</div>
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<div class="line"><a name="l00288"></a><span class="lineno"> 288</span>  </div>
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<div class="line"><a name="l00294"></a><span class="lineno"> 294</span>  <span class="keyword">template</span><<span class="keyword">typename</span> Event></div>
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<div class="line"><a name="l00295"></a><span class="lineno"><a class="line" href="classentt_1_1emitter.html#a08c6111af231c9a82277069a3bf21b75"> 295</a></span>  [[nodiscard]] <span class="keywordtype">bool</span> <a class="code" href="classentt_1_1emitter.html#a08c6111af231c9a82277069a3bf21b75">empty</a>()<span class="keyword"> const </span>{</div>
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<div class="line"><a name="l00296"></a><span class="lineno"> 296</span>  <span class="keyword">const</span> <span class="keyword">auto</span> *cpool = assure<Event>();</div>
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<div class="line"><a name="l00297"></a><span class="lineno"> 297</span>  <span class="keywordflow">return</span> !cpool || cpool->empty();</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="l00299"></a><span class="lineno"> 299</span>  </div>
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<div class="line"><a name="l00304"></a><span class="lineno"><a class="line" href="classentt_1_1emitter.html#ad395b7c4de0f1f6e01a6e1c113db6937"> 304</a></span>  [[nodiscard]] <span class="keywordtype">bool</span> <a class="code" href="classentt_1_1emitter.html#ad395b7c4de0f1f6e01a6e1c113db6937">empty</a>() const ENTT_NOEXCEPT {</div>
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<div class="line"><a name="l00305"></a><span class="lineno"> 305</span>  <span class="keywordflow">return</span> std::all_of(pools.cbegin(), pools.cend(), [](<span class="keyword">auto</span> &&cpool) {</div>
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<div class="line"><a name="l00306"></a><span class="lineno"> 306</span>  return cpool.second->empty();</div>
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<div class="line"><a name="l00307"></a><span class="lineno"> 307</span>  });</div>
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<div class="line"><a name="l00308"></a><span class="lineno"> 308</span>  }</div>
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<div class="line"><a name="l00309"></a><span class="lineno"> 309</span>  </div>
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<div class="line"><a name="l00310"></a><span class="lineno"> 310</span> <span class="keyword">private</span>:</div>
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<div class="line"><a name="l00311"></a><span class="lineno"> 311</span>  <a class="code" href="classentt_1_1dense__hash__map.html">dense_hash_map<id_type, std::unique_ptr<basic_pool></a>, <a class="code" href="structentt_1_1identity.html">identity</a>> pools{};</div>
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<div class="line"><a name="l00312"></a><span class="lineno"> 312</span> };</div>
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<div class="line"><a name="l00313"></a><span class="lineno"> 313</span>  </div>
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<div class="line"><a name="l00314"></a><span class="lineno"> 314</span> } <span class="comment">// namespace entt</span></div>
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<div class="line"><a name="l00315"></a><span class="lineno"> 315</span>  </div>
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<div class="line"><a name="l00316"></a><span class="lineno"> 316</span> <span class="preprocessor">#endif</span></div>
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<div class="ttc" id="aclassentt_1_1dense__hash__map_html"><div class="ttname"><a href="classentt_1_1dense__hash__map.html">entt::dense_hash_map</a></div><div class="ttdoc">Associative container for key-value pairs with unique keys.</div><div class="ttdef"><b>Definition:</b> <a href="dense__hash__map_8hpp_source.html#l00240">dense_hash_map.hpp:240</a></div></div>
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<div class="ttc" id="aclassentt_1_1emitter_html"><div class="ttname"><a href="classentt_1_1emitter.html">entt::emitter</a></div><div class="ttdoc">General purpose event emitter.</div><div class="ttdef"><b>Definition:</b> <a href="emitter_8hpp_source.html#l00041">emitter.hpp:41</a></div></div>
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<div class="ttc" id="aclassentt_1_1emitter_html_a08c6111af231c9a82277069a3bf21b75"><div class="ttname"><a href="classentt_1_1emitter.html#a08c6111af231c9a82277069a3bf21b75">entt::emitter::empty</a></div><div class="ttdeci">bool empty() const</div><div class="ttdoc">Checks if there are listeners registered for the specific event.</div><div class="ttdef"><b>Definition:</b> <a href="emitter_8hpp_source.html#l00295">emitter.hpp:295</a></div></div>
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<div class="ttc" id="aclassentt_1_1emitter_html_a0b580005200bb810a4a3e94320efcd8a"><div class="ttname"><a href="classentt_1_1emitter.html#a0b580005200bb810a4a3e94320efcd8a">entt::emitter::on</a></div><div class="ttdeci">connection< Event > on(listener< Event > instance)</div><div class="ttdoc">Registers a long-lived listener with the event emitter.</div><div class="ttdef"><b>Definition:</b> <a href="emitter_8hpp_source.html#l00221">emitter.hpp:221</a></div></div>
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<div class="ttc" id="aclassentt_1_1emitter_html_a1200216d9abb1adb18db6035d99b60da"><div class="ttname"><a href="classentt_1_1emitter.html#a1200216d9abb1adb18db6035d99b60da">entt::emitter::listener</a></div><div class="ttdeci">typename pool_handler< Event >::listener_type listener</div><div class="ttdoc">Type of listeners accepted for the given event.</div><div class="ttdef"><b>Definition:</b> <a href="emitter_8hpp_source.html#l00142">emitter.hpp:142</a></div></div>
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<div class="ttc" id="aclassentt_1_1emitter_html_a4e4324c59afee760ca13772eb6d2d522"><div class="ttname"><a href="classentt_1_1emitter.html#a4e4324c59afee760ca13772eb6d2d522">entt::emitter::clear</a></div><div class="ttdeci">void clear()</div><div class="ttdoc">Disconnects all the listeners for the given event type.</div><div class="ttdef"><b>Definition:</b> <a href="emitter_8hpp_source.html#l00273">emitter.hpp:273</a></div></div>
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<div class="ttc" id="aclassentt_1_1emitter_html_a79834d452b0600ebe0e70c54f4a21fd6"><div class="ttname"><a href="classentt_1_1emitter.html#a79834d452b0600ebe0e70c54f4a21fd6">entt::emitter::once</a></div><div class="ttdeci">connection< Event > once(listener< Event > instance)</div><div class="ttdoc">Registers a short-lived listener with the event emitter.</div><div class="ttdef"><b>Definition:</b> <a href="emitter_8hpp_source.html#l00246">emitter.hpp:246</a></div></div>
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<div class="ttc" id="aclassentt_1_1emitter_html_a842fef69b914a160b0bcc211bb77b27b"><div class="ttname"><a href="classentt_1_1emitter.html#a842fef69b914a160b0bcc211bb77b27b">entt::emitter::emitter</a></div><div class="ttdeci">emitter(emitter &&)=default</div><div class="ttdoc">Default move constructor.</div></div>
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<div class="ttc" id="aclassentt_1_1emitter_html_a9525364769b8daf55dd942599aa0a09c"><div class="ttname"><a href="classentt_1_1emitter.html#a9525364769b8daf55dd942599aa0a09c">entt::emitter::erase</a></div><div class="ttdeci">void erase(connection< Event > conn)</div><div class="ttdoc">Disconnects a listener from the event emitter.</div><div class="ttdef"><b>Definition:</b> <a href="emitter_8hpp_source.html#l00260">emitter.hpp:260</a></div></div>
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<div class="ttc" id="aclassentt_1_1emitter_html_ab270d2c6d986621a781467e29e64629c"><div class="ttname"><a href="classentt_1_1emitter.html#ab270d2c6d986621a781467e29e64629c">entt::emitter::operator=</a></div><div class="ttdeci">emitter & operator=(emitter &&)=default</div><div class="ttdoc">Default move assignment operator.</div></div>
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<div class="ttc" id="aclassentt_1_1emitter_html_ad2877515662e6fce3558688b4fd598aa"><div class="ttname"><a href="classentt_1_1emitter.html#ad2877515662e6fce3558688b4fd598aa">entt::emitter::publish</a></div><div class="ttdeci">void publish(Args &&...args)</div><div class="ttdoc">Emits the given event.</div><div class="ttdef"><b>Definition:</b> <a href="emitter_8hpp_source.html#l00195">emitter.hpp:195</a></div></div>
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<div class="ttc" id="aclassentt_1_1emitter_html_ad395b7c4de0f1f6e01a6e1c113db6937"><div class="ttname"><a href="classentt_1_1emitter.html#ad395b7c4de0f1f6e01a6e1c113db6937">entt::emitter::empty</a></div><div class="ttdeci">bool empty() const</div><div class="ttdoc">Checks if there are listeners registered with the event emitter.</div><div class="ttdef"><b>Definition:</b> <a href="emitter_8hpp_source.html#l00304">emitter.hpp:304</a></div></div>
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<div class="ttc" id="aclassentt_1_1emitter_html_af36907a2dc7cc0a6607533c67e072f92"><div class="ttname"><a href="classentt_1_1emitter.html#af36907a2dc7cc0a6607533c67e072f92">entt::emitter::emitter</a></div><div class="ttdeci">emitter()=default</div><div class="ttdoc">Default constructor.</div></div>
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<div class="ttc" id="aclassentt_1_1emitter_html_af3d352c547768be34f03f0fbfdd30b43"><div class="ttname"><a href="classentt_1_1emitter.html#af3d352c547768be34f03f0fbfdd30b43">entt::emitter::~emitter</a></div><div class="ttdeci">virtual ~emitter()</div><div class="ttdoc">Default destructor.</div><div class="ttdef"><b>Definition:</b> <a href="emitter_8hpp_source.html#l00173">emitter.hpp:173</a></div></div>
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<div class="ttc" id="aclassentt_1_1emitter_html_afed3485e23fdbb87d007208382428813"><div class="ttname"><a href="classentt_1_1emitter.html#afed3485e23fdbb87d007208382428813">entt::emitter::clear</a></div><div class="ttdeci">void clear()</div><div class="ttdoc">Disconnects all the listeners.</div><div class="ttdef"><b>Definition:</b> <a href="emitter_8hpp_source.html#l00283">emitter.hpp:283</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__hash__map_8hpp_source.html#l00021">dense_hash_map.hpp:21</a></div></div>
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<div class="ttc" id="astructentt_1_1emitter_1_1connection_html"><div class="ttname"><a href="structentt_1_1emitter_1_1connection.html">entt::emitter::connection</a></div><div class="ttdoc">Generic connection type for events.</div><div class="ttdef"><b>Definition:</b> <a href="emitter_8hpp_source.html#l00154">emitter.hpp:154</a></div></div>
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<div class="ttc" id="astructentt_1_1emitter_1_1connection_html_a0fa687596e072155e92e586e9de089c3"><div class="ttname"><a href="structentt_1_1emitter_1_1connection.html#a0fa687596e072155e92e586e9de089c3">entt::emitter::connection::connection</a></div><div class="ttdeci">connection(typename pool_handler< Event >::connection_type conn)</div><div class="ttdoc">Creates a connection that wraps its underlying instance.</div><div class="ttdef"><b>Definition:</b> <a href="emitter_8hpp_source.html#l00165">emitter.hpp:165</a></div></div>
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<div class="ttc" id="astructentt_1_1emitter_1_1connection_html_a3dcb29742c6824dd28743eb0d896f9c3"><div class="ttname"><a href="structentt_1_1emitter_1_1connection.html#a3dcb29742c6824dd28743eb0d896f9c3">entt::emitter::connection::connection</a></div><div class="ttdeci">connection()=default</div><div class="ttdoc">Default constructor.</div></div>
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<div class="ttc" id="astructentt_1_1identity_html"><div class="ttname"><a href="structentt_1_1identity.html">entt::identity</a></div><div class="ttdoc">Identity function object (waiting for C++20).</div><div class="ttdef"><b>Definition:</b> <a href="core_2utility_8hpp_source.html#l00010">utility.hpp:10</a></div></div>
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<div class="ttc" id="astructentt_1_1type__hash_html"><div class="ttname"><a href="structentt_1_1type__hash.html">entt::type_hash</a></div><div class="ttdoc">Type hash.</div><div class="ttdef"><b>Definition:</b> <a href="type__info_8hpp_source.html#l00100">type_info.hpp:100</a></div></div>
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