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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="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="preprocessor">#ifndef ENTT_SIGNAL_DELEGATE_HPP</span></div><div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="preprocessor">#define ENTT_SIGNAL_DELEGATE_HPP</span></div><div class="line"><a name="l00003"></a><span class="lineno"> 3</span> </div><div class="line"><a name="l00004"></a><span class="lineno"> 4</span> </div><div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="preprocessor">#include <tuple></span></div><div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="preprocessor">#include <cstring></span></div><div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="preprocessor">#include <utility></span></div><div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="preprocessor">#include <algorithm></span></div><div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="preprocessor">#include <functional></span></div><div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="preprocessor">#include <type_traits></span></div><div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="preprocessor">#include "../config/config.h"</span></div><div class="line"><a name="l00012"></a><span class="lineno"> 12</span> </div><div class="line"><a name="l00013"></a><span class="lineno"> 13</span> </div><div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="keyword">namespace </span><a class="code" href="namespaceentt.html">entt</a> {</div><div class="line"><a name="l00015"></a><span class="lineno"> 15</span> </div><div class="line"><a name="l00016"></a><span class="lineno"> 16</span> </div><div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="keyword">namespace </span>internal {</div><div class="line"><a name="l00024"></a><span class="lineno"> 24</span> </div><div class="line"><a name="l00025"></a><span class="lineno"> 25</span> </div><div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="keyword">template</span><<span class="keyword">typename</span> Ret, <span class="keyword">typename</span>... Args></div><div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="keyword">auto</span> to_function_pointer(Ret(*)(Args...)) -> Ret(*)(Args...);</div><div class="line"><a name="l00028"></a><span class="lineno"> 28</span> </div><div class="line"><a name="l00029"></a><span class="lineno"> 29</span> </div><div class="line"><a name="l00030"></a><span class="lineno"> 30</span> <span class="keyword">template</span><<span class="keyword">typename</span> Ret, <span class="keyword">typename</span>... Args, <span class="keyword">typename</span> Type, <span class="keyword">typename</span> Payload, <span class="keyword">typename</span> = std::enable_if_t<std::is_convertible_v<Payload &, Type &>>></div><div class="line"><a name="l00031"></a><span class="lineno"> 31</span> <span class="keyword">auto</span> to_function_pointer(Ret(*)(Type &, Args...), Payload &) -> Ret(*)(Args...);</div><div class="line"><a name="l00032"></a><span class="lineno"> 32</span> </div><div class="line"><a name="l00033"></a><span class="lineno"> 33</span> </div><div class="line"><a name="l00034"></a><span class="lineno"> 34</span> <span class="keyword">template</span><<span class="keyword">typename</span> Class, <span class="keyword">typename</span> Ret, <span class="keyword">typename</span>... Args></div><div class="line"><a name="l00035"></a><span class="lineno"> 35</span> <span class="keyword">auto</span> to_function_pointer(Ret(Class:: *)(Args...), <span class="keyword">const</span> Class &) -> Ret(*)(Args...);</div><div class="line"><a name="l00036"></a><span class="lineno"> 36</span> </div><div class="line"><a name="l00037"></a><span class="lineno"> 37</span> </div><div class="line"><a name="l00038"></a><span class="lineno"> 38</span> <span class="keyword">template</span><<span class="keyword">typename</span> Class, <span class="keyword">typename</span> Ret, <span class="keyword">typename</span>... Args></div><div class="line"><a name="l00039"></a><span class="lineno"> 39</span> <span class="keyword">auto</span> to_function_pointer(Ret(Class:: *)(Args...) <span class="keyword">const</span>, <span class="keyword">const</span> Class &) -> Ret(*)(Args...);</div><div class="line"><a name="l00040"></a><span class="lineno"> 40</span> </div><div class="line"><a name="l00041"></a><span class="lineno"> 41</span> </div><div class="line"><a name="l00042"></a><span class="lineno"> 42</span> <span class="keyword">template</span><<span class="keyword">typename</span> Class, <span class="keyword">typename</span> Type></div><div class="line"><a name="l00043"></a><span class="lineno"> 43</span> <span class="keyword">auto</span> to_function_pointer(Type Class:: *, <span class="keyword">const</span> Class &) -> Type(*)();</div><div class="line"><a name="l00044"></a><span class="lineno"> 44</span> </div><div class="line"><a name="l00045"></a><span class="lineno"> 45</span> </div><div class="line"><a name="l00046"></a><span class="lineno"> 46</span> <span class="keyword">template</span><<span class="keyword">typename</span>></div><div class="line"><a name="l00047"></a><span class="lineno"> 47</span> <span class="keyword">struct </span>function_extent;</div><div class="line"><a name="l00048"></a><span class="lineno"> 48</span> </div><div class="line"><a name="l00049"></a><span class="lineno"> 49</span> </div><div class="line"><a name="l00050"></a><span class="lineno"> 50</span> <span class="keyword">template</span><<span class="keyword">typename</span> Ret, <span class="keyword">typename</span>... Args></div><div class="line"><a name="l00051"></a><span class="lineno"> 51</span> <span class="keyword">struct </span>function_extent<Ret(*)(Args...)> {</div><div class="line"><a name="l00052"></a><span class="lineno"> 52</span>  <span class="keyword">static</span> constexpr <span class="keyword">auto</span> value = <span class="keyword">sizeof</span>...(Args);</div><div class="line"><a name="l00053"></a><span class="lineno"> 53</span> };</div><div class="line"><a name="l00054"></a><span class="lineno"> 54</span> </div><div class="line"><a name="l00055"></a><span class="lineno"> 55</span> </div><div class="line"><a name="l00056"></a><span class="lineno"> 56</span> <span class="keyword">template</span><<span class="keyword">typename</span> Func></div><div class="line"><a name="l00057"></a><span class="lineno"> 57</span> constexpr <span class="keyword">auto</span> function_extent_v = function_extent<Func>::value;</div><div class="line"><a name="l00058"></a><span class="lineno"> 58</span> </div><div class="line"><a name="l00059"></a><span class="lineno"> 59</span> </div><div class="line"><a name="l00060"></a><span class="lineno"> 60</span> }</div><div class="line"><a name="l00061"></a><span class="lineno"> 61</span> </div><div class="line"><a name="l00062"></a><span class="lineno"> 62</span> </div><div class="line"><a name="l00070"></a><span class="lineno"> 70</span> <span class="keyword">template</span><auto></div><div class="line"><a name="l00071"></a><span class="lineno"><a class="line" href="structentt_1_1connect__arg__t.html"> 71</a></span> <span class="keyword">struct </span><a class="code" href="structentt_1_1connect__arg__t.html">connect_arg_t</a> {};</div><div class="line"><a name="l00072"></a><span class="lineno"> 72</span> </div><div class="line"><a name="l00073"></a><span class="lineno"> 73</span> </div><div class="line"><a name="l00075"></a><span class="lineno"> 75</span> <span class="keyword">template</span><auto Func></div><div class="line"><a name="l00076"></a><span class="lineno"><a class="line" href="namespaceentt.html#af1e73acd6f3d892955819677dc2664b7"> 76</a></span> constexpr <a class="code" href="structentt_1_1connect__arg__t.html">connect_arg_t<Func></a> <a class="code" href="namespaceentt.html#af1e73acd6f3d892955819677dc2664b7">connect_arg</a>{};</div><div class="line"><a name="l00077"></a><span class="lineno"> 77</span> </div><div class="line"><a name="l00078"></a><span class="lineno"> 78</span> </div><div class="line"><a name="l00085"></a><span class="lineno"> 85</span> <span class="keyword">template</span><<span class="keyword">typename</span>></div><div class="line"><a name="l00086"></a><span class="lineno"><a class="line" href="classentt_1_1delegate.html"> 86</a></span> <span class="keyword">class </span><a class="code" href="classentt_1_1delegate.html">delegate</a>;</div><div class="line"><a name="l00087"></a><span class="lineno"> 87</span> </div><div class="line"><a name="l00088"></a><span class="lineno"> 88</span> </div><div class="line"><a name="l00102"></a><span class="lineno"> 102</span> <span class="keyword">template</span><<span class="keyword">typename</span> Ret, <span class="keyword">typename</span>... Args></div><div class="line"><a name="l00103"></a><span class="lineno"><a class="line" href="classentt_1_1delegate_3_01Ret_07Args_8_8_8_08_4.html"> 103</a></span> <span class="keyword">class </span><a class="code" href="classentt_1_1delegate.html">delegate</a><Ret(Args...)> {</div><div class="line"><a name="l00104"></a><span class="lineno"> 104</span>  <span class="keyword">using</span> proto_fn_type = Ret(<span class="keyword">const</span> <span class="keywordtype">void</span> *, std::tuple<Args &&...>);</div><div class="line"><a name="l00105"></a><span class="lineno"> 105</span> </div><div class="line"><a name="l00106"></a><span class="lineno"> 106</span>  <span class="keyword">template</span><<span class="keyword">auto</span> Function, std::size_t... Index></div><div class="line"><a name="l00107"></a><span class="lineno"> 107</span>  <span class="keywordtype">void</span> connect(std::index_sequence<Index...>) ENTT_NOEXCEPT {</div><div class="line"><a name="l00108"></a><span class="lineno"> 108</span>  static_assert(std::is_invocable_r_v<Ret, decltype(Function), std::tuple_element_t<Index, std::tuple<Args...>>...>);</div><div class="line"><a name="l00109"></a><span class="lineno"> 109</span>  data = <span class="keyword">nullptr</span>;</div><div class="line"><a name="l00110"></a><span class="lineno"> 110</span> </div><div class="line"><a name="l00111"></a><span class="lineno"> 111</span>  fn = [](<span class="keyword">const</span> <span class="keywordtype">void</span> *, std::tuple<Args &&...> args) -> Ret {</div><div class="line"><a name="l00112"></a><span class="lineno"> 112</span>  <span class="comment">// Ret(...) makes void(...) eat the return values to avoid errors</span></div><div class="line"><a name="l00113"></a><span class="lineno"> 113</span>  <span class="keywordflow">return</span> Ret(std::invoke(Function, std::forward<std::tuple_element_t<Index, std::tuple<Args...>>>(std::get<Index>(args))...));</div><div class="line"><a name="l00114"></a><span class="lineno"> 114</span>  };</div><div class="line"><a name="l00115"></a><span class="lineno"> 115</span>  }</div><div class="line"><a name="l00116"></a><span class="lineno"> 116</span> </div><div class="line"><a name="l00117"></a><span class="lineno"> 117</span>  <span class="keyword">template</span><<span class="keyword">auto</span> Candidate, <span class="keyword">typename</span> Type, std::size_t... Index></div><div class="line"><a name="l00118"></a><span class="lineno"> 118</span>  <span class="keywordtype">void</span> connect(Type &value_or_instance, std::index_sequence<Index...>) ENTT_NOEXCEPT {</div><div class="line"><a name="l00119"></a><span class="lineno"> 119</span>  static_assert(std::is_invocable_r_v<Ret, decltype(Candidate), Type &, std::tuple_element_t<Index, std::tuple<Args...>>...>);</div><div class="line"><a name="l00120"></a><span class="lineno"> 120</span>  data = &value_or_instance;</div><div class="line"><a name="l00121"></a><span class="lineno"> 121</span> </div><div class="line"><a name="l00122"></a><span class="lineno"> 122</span>  fn = [](<span class="keyword">const</span> <span class="keywordtype">void</span> *payload, std::tuple<Args &&...> args) -> Ret {</div><div class="line"><a name="l00123"></a><span class="lineno"> 123</span>  Type *curr = <span class="keyword">nullptr</span>;</div><div class="line"><a name="l00124"></a><span class="lineno"> 124</span> </div><div class="line"><a name="l00125"></a><span class="lineno"> 125</span>  <span class="keywordflow">if</span> constexpr(std::is_const_v<Type>) {</div><div class="line"><a name="l00126"></a><span class="lineno"> 126</span>  curr = <span class="keyword">static_cast<</span>Type *<span class="keyword">></span>(payload);</div><div class="line"><a name="l00127"></a><span class="lineno"> 127</span>  } <span class="keywordflow">else</span> {</div><div class="line"><a name="l00128"></a><span class="lineno"> 128</span>  curr = <span class="keyword">static_cast<</span>Type *<span class="keyword">></span>(<span class="keyword">const_cast<</span><span class="keywordtype">void</span> *<span class="keyword">></span>(payload));</div><div class="line"><a name="l00129"></a><span class="lineno"> 129</span>  }</div><div class="line"><a name="l00130"></a><span class="lineno"> 130</span> </div><div class="line"><a name="l00131"></a><span class="lineno"> 131</span>  <span class="comment">// Ret(...) makes void(...) eat the return values to avoid errors</span></div><div class="line"><a name="l00132"></a><span class="lineno"> 132</span>  <span class="keywordflow">return</span> Ret(std::invoke(Candidate, *curr, std::forward<std::tuple_element_t<Index, std::tuple<Args...>>>(std::get<Index>(args))...));</div><div class="line"><a name="l00133"></a><span class="lineno"> 133</span>  };</div><div class="line"><a name="l00134"></a><span class="lineno"> 134</span>  }</div><div class="line"><a name="l00135"></a><span class="lineno"> 135</span> </div><div class="line"><a name="l00136"></a><span class="lineno"> 136</span> <span class="keyword">public</span>:</div><div class="line"><a name="l00138"></a><span class="lineno"><a class="line" href="classentt_1_1delegate_3_01Ret_07Args_8_8_8_08_4.html#a235927a00f56e4b56dbfdc4e6cf5ddb4"> 138</a></span>  <span class="keyword">using</span> <a class="code" href="classentt_1_1delegate_3_01Ret_07Args_8_8_8_08_4.html#a235927a00f56e4b56dbfdc4e6cf5ddb4">function_type</a> = Ret(Args...);</div><div class="line"><a name="l00139"></a><span class="lineno"> 139</span> </div><div class="line"><a name="l00141"></a><span class="lineno"><a class="line" href="classentt_1_1delegate_3_01Ret_07Args_8_8_8_08_4.html#a5c4828a5df5ed1e8fd18465ff63eb73c"> 141</a></span>  <a class="code" href="classentt_1_1delegate_3_01Ret_07Args_8_8_8_08_4.html#a5c4828a5df5ed1e8fd18465ff63eb73c">delegate</a>() ENTT_NOEXCEPT</div><div class="line"><a name="l00142"></a><span class="lineno"> 142</span>  : fn{<span class="keyword">nullptr</span>}, data{<span class="keyword">nullptr</span>}</div><div class="line"><a name="l00143"></a><span class="lineno"> 143</span>  {}</div><div class="line"><a name="l00144"></a><span class="lineno"> 144</span> </div><div class="line"><a name="l00149"></a><span class="lineno"> 149</span>  <span class="keyword">template</span><auto Function></div><div class="line"><a name="l00150"></a><span class="lineno"><a class="line" href="classentt_1_1delegate_3_01Ret_07Args_8_8_8_08_4.html#ad07c76f552619d55edc17a3722958215"> 150</a></span>  <a class="code" href="classentt_1_1delegate_3_01Ret_07Args_8_8_8_08_4.html#ad07c76f552619d55edc17a3722958215">delegate</a>(<a class="code" href="structentt_1_1connect__arg__t.html">connect_arg_t<Function></a>) ENTT_NOEXCEPT</div><div class="line"><a name="l00151"></a><span class="lineno"> 151</span>  : <a class="code" href="classentt_1_1delegate.html">delegate</a>{}</div><div class="line"><a name="l00152"></a><span class="lineno"> 152</span>  {</div><div class="line"><a name="l00153"></a><span class="lineno"> 153</span>  connect<Function>();</div><div class="line"><a name="l00154"></a><span class="lineno"> 154</span>  }</div><div class="line"><a name="l00155"></a><span class="lineno"> 155</span> </div><div class="line"><a name="l00163"></a><span class="lineno"> 163</span>  <span class="keyword">template</span><auto Cand<span class="keywordtype">id</span>ate, <span class="keyword">typename</span> Type></div><div class="line"><a name="l00164"></a><span class="lineno"><a class="line" href="classentt_1_1delegate_3_01Ret_07Args_8_8_8_08_4.html#a24fbe634fda0fe5c67ec6deba0deaa66"> 164</a></span>  <a class="code" href="classentt_1_1delegate_3_01Ret_07Args_8_8_8_08_4.html#a24fbe634fda0fe5c67ec6deba0deaa66">delegate</a>(<a class="code" href="structentt_1_1connect__arg__t.html">connect_arg_t<Candidate></a>, Type &value_or_instance) ENTT_NOEXCEPT</div><div class="line"><a name="l00165"></a><span class="lineno"> 165</span>  : <a class="code" href="classentt_1_1delegate.html">delegate</a>{}</div><div class="line"><a name="l00166"></a><span class="lineno"> 166</span>  {</div><div class="line"><a name="l00167"></a><span class="lineno"> 167</span>  connect<Candidate>(value_or_instance);</div><div class="line"><a name="l00168"></a><span class="lineno"> 168</span>  }</div><div class="line"><a name="l00169"></a><span class="lineno"> 169</span> </div><div class="line"><a name="l00174"></a><span class="lineno"> 174</span>  <span class="keyword">template</span><auto Function></div><div class="line"><a name="l00175"></a><span class="lineno"><a class="line" href="classentt_1_1delegate_3_01Ret_07Args_8_8_8_08_4.html#a6e732abcbc4aa9b8899c92d8f21e55a6"> 175</a></span>  <span class="keywordtype">void</span> <a class="code" href="classentt_1_1delegate_3_01Ret_07Args_8_8_8_08_4.html#a6e732abcbc4aa9b8899c92d8f21e55a6">connect</a>() ENTT_NOEXCEPT {</div><div class="line"><a name="l00176"></a><span class="lineno"> 176</span>  constexpr <span class="keyword">auto</span> extent = internal::function_extent_v<decltype(internal::to_function_pointer(std::declval<decltype(Function)>()))>;</div><div class="line"><a name="l00177"></a><span class="lineno"> 177</span>  connect<Function>(std::make_index_sequence<extent>{});</div><div class="line"><a name="l00178"></a><span class="lineno"> 178</span>  }</div><div class="line"><a name="l00179"></a><span class="lineno"> 179</span> </div><div class="line"><a name="l00195"></a><span class="lineno"> 195</span>  <span class="keyword">template</span><auto Cand<span class="keywordtype">id</span>ate, <span class="keyword">typename</span> Type></div><div class="line"><a name="l00196"></a><span class="lineno"><a class="line" href="classentt_1_1delegate_3_01Ret_07Args_8_8_8_08_4.html#aae828d209ffe33590c2bb8e4b37f47ef"> 196</a></span>  <span class="keywordtype">void</span> <a class="code" href="classentt_1_1delegate_3_01Ret_07Args_8_8_8_08_4.html#aae828d209ffe33590c2bb8e4b37f47ef">connect</a>(Type &value_or_instance) ENTT_NOEXCEPT {</div><div class="line"><a name="l00197"></a><span class="lineno"> 197</span>  constexpr <span class="keyword">auto</span> extent = internal::function_extent_v<decltype(internal::to_function_pointer(std::declval<decltype(Candidate)>(), value_or_instance))>;</div><div class="line"><a name="l00198"></a><span class="lineno"> 198</span>  connect<Candidate>(value_or_instance, std::make_index_sequence<extent>{});</div><div class="line"><a name="l00199"></a><span class="lineno"> 199</span>  }</div><div class="line"><a name="l00200"></a><span class="lineno"> 200</span> </div><div class="line"><a name="l00206"></a><span class="lineno"><a class="line" href="classentt_1_1delegate_3_01Ret_07Args_8_8_8_08_4.html#a0d81bb1bde6abd78914cd0a07084bcd7"> 206</a></span>  <span class="keywordtype">void</span> <a class="code" href="classentt_1_1delegate_3_01Ret_07Args_8_8_8_08_4.html#a0d81bb1bde6abd78914cd0a07084bcd7">reset</a>() ENTT_NOEXCEPT {</div><div class="line"><a name="l00207"></a><span class="lineno"> 207</span>  fn = <span class="keyword">nullptr</span>;</div><div class="line"><a name="l00208"></a><span class="lineno"> 208</span>  data = <span class="keyword">nullptr</span>;</div><div class="line"><a name="l00209"></a><span class="lineno"> 209</span>  }</div><div class="line"><a name="l00210"></a><span class="lineno"> 210</span> </div><div class="line"><a name="l00215"></a><span class="lineno"><a class="line" href="classentt_1_1delegate_3_01Ret_07Args_8_8_8_08_4.html#a3e0495b7612d458cbc59dc4b657d586f"> 215</a></span>  <span class="keyword">const</span> <span class="keywordtype">void</span> * <a class="code" href="classentt_1_1delegate_3_01Ret_07Args_8_8_8_08_4.html#a3e0495b7612d458cbc59dc4b657d586f">instance</a>() const ENTT_NOEXCEPT {</div><div class="line"><a name="l00216"></a><span class="lineno"> 216</span>  <span class="keywordflow">return</span> data;</div><div class="line"><a name="l00217"></a><span class="lineno"> 217</span>  }</div><div class="line"><a name="l00218"></a><span class="lineno"> 218</span> </div><div class="line"><a name="l00233"></a><span class="lineno"><a class="line" href="classentt_1_1delegate_3_01Ret_07Args_8_8_8_08_4.html#a0e53caedb53810bc96aa71bce199c990"> 233</a></span>  Ret <a class="code" href="classentt_1_1delegate_3_01Ret_07Args_8_8_8_08_4.html#a0e53caedb53810bc96aa71bce199c990">operator()</a>(Args... args)<span class="keyword"> const </span>{</div><div class="line"><a name="l00234"></a><span class="lineno"> 234</span>  ENTT_ASSERT(fn);</div><div class="line"><a name="l00235"></a><span class="lineno"> 235</span>  <span class="keywordflow">return</span> fn(data, std::forward_as_tuple(std::forward<Args>(args)...));</div><div class="line"><a name="l00236"></a><span class="lineno"> 236</span>  }</div><div class="line"><a name="l00237"></a><span class="lineno"> 237</span> </div><div class="line"><a name="l00242"></a><span class="lineno"><a class="line" href="classentt_1_1delegate_3_01Ret_07Args_8_8_8_08_4.html#a73e1029cbb6359d803a6cc06b82f80d7"> 242</a></span>  <span class="keyword">explicit</span> <span class="keyword">operator</span> bool() const ENTT_NOEXCEPT {</div><div class="line"><a name="l00243"></a><span class="lineno"> 243</span>  <span class="comment">// no need to test also data</span></div><div class="line"><a name="l00244"></a><span class="lineno"> 244</span>  <span class="keywordflow">return</span> fn;</div><div class="line"><a name="l00245"></a><span class="lineno"> 245</span>  }</div><div class="line"><a name="l00246"></a><span class="lineno"> 246</span> </div><div class="line"><a name="l00252"></a><span class="lineno"><a class="line" href="classentt_1_1delegate_3_01Ret_07Args_8_8_8_08_4.html#a54ca30c9a3f7a9662363c48db4e86aae"> 252</a></span>  <span class="keywordtype">bool</span> <a class="code" href="classentt_1_1delegate_3_01Ret_07Args_8_8_8_08_4.html#a54ca30c9a3f7a9662363c48db4e86aae">operator==</a>(<span class="keyword">const</span> <a class="code" href="classentt_1_1delegate.html">delegate</a><Ret(Args...)> &other) <span class="keyword">const</span> ENTT_NOEXCEPT {</div><div class="line"><a name="l00253"></a><span class="lineno"> 253</span>  <span class="keywordflow">return</span> fn == other.fn && data == other.data;</div><div class="line"><a name="l00254"></a><span class="lineno"> 254</span>  }</div><div class="line"><a name="l00255"></a><span class="lineno"> 255</span> </div><div class="line"><a name="l00256"></a><span class="lineno"> 256</span> <span class="keyword">private</span>:</div><div class="line"><a name="l00257"></a><span class="lineno"> 257</span>  proto_fn_type *fn;</div><div class="line"><a name="l00258"></a><span class="lineno"> 258</span>  <span class="keyword">const</span> <span class="keywordtype">void</span> *data;</div><div class="line"><a name="l00259"></a><span class="lineno"> 259</span> };</div><div class="line"><a name="l00260"></a><span class="lineno"> 260</span> </div><div class="line"><a name="l00261"></a><span class="lineno"> 261</span> </div><div class="line"><a name="l00270"></a><span class="lineno"> 270</span> <span class="keyword">template</span><<span class="keyword">typename</span> Ret, <span class="keyword">typename</span>... Args></div><div class="line"><a name="l00271"></a><span class="lineno"><a class="line" href="namespaceentt.html#a656b2ec80abf493ce1924b314d13fd18"> 271</a></span> <span class="keywordtype">bool</span> <a class="code" href="namespaceentt.html#a1a211752d12273a08015c524133e27c3">operator!=</a>(<span class="keyword">const</span> <a class="code" href="classentt_1_1delegate.html">delegate</a><Ret(Args...)> &lhs, <span class="keyword">const</span> <a class="code" href="classentt_1_1delegate.html">delegate</a><Ret(Args...)> &rhs) ENTT_NOEXCEPT {</div><div class="line"><a name="l00272"></a><span class="lineno"> 272</span>  <span class="keywordflow">return</span> !(lhs == rhs);</div><div class="line"><a name="l00273"></a><span class="lineno"> 273</span> }</div><div class="line"><a name="l00274"></a><span class="lineno"> 274</span> </div><div class="line"><a name="l00275"></a><span class="lineno"> 275</span> </div><div class="line"><a name="l00284"></a><span class="lineno"> 284</span> <span class="keyword">template</span><auto Function></div><div class="line"><a name="l00285"></a><span class="lineno"> 285</span> <a class="code" href="namespaceentt.html#aeda304d14f286ffcb1d872a6ef526745">delegate</a>(<a class="code" href="structentt_1_1connect__arg__t.html">connect_arg_t<Function></a>) ENTT_NOEXCEPT</div><div class="line"><a name="l00286"></a><span class="lineno"> 286</span> -> <a class="code" href="classentt_1_1delegate.html">delegate<std::remove_pointer_t<decltype(internal::to_function_pointer(Function))></a>>;</div><div class="line"><a name="l00287"></a><span class="lineno"> 287</span> </div><div class="line"><a name="l00288"></a><span class="lineno"> 288</span> </div><div class="line"><a name="l00299"></a><span class="lineno"> 299</span> <span class="keyword">template</span><auto Cand<span class="keywordtype">id</span>ate, <span class="keyword">typename</span> Type></div><div class="line"><a name="l00300"></a><span class="lineno"> 300</span> <a class="code" href="namespaceentt.html#aeda304d14f286ffcb1d872a6ef526745">delegate</a>(<a class="code" href="structentt_1_1connect__arg__t.html">connect_arg_t<Candidate></a>, Type &value_or_instance) ENTT_NOEXCEPT</div><div class="line"><a name="l00301"></a><span class="lineno"> 301</span> -> <a class="code" href="classentt_1_1delegate.html">delegate<std::remove_pointer_t<decltype(internal::to_function_pointer(Candidate, value_or_instance))></a>>;</div><div class="line"><a name="l00302"></a><span class="lineno"> 302</span> </div><div class="line"><a name="l00303"></a><span class="lineno"> 303</span> </div><div class="line"><a name="l00304"></a><span class="lineno"> 304</span> }</div><div class="line"><a name="l00305"></a><span class="lineno"> 305</span> </div><div class="line"><a name="l00306"></a><span class="lineno"> 306</span> </div><div class="line"><a name="l00307"></a><span class="lineno"> 307</span> <span class="preprocessor">#endif // ENTT_SIGNAL_DELEGATE_HPP</span></div><div class="ttc" id="classentt_1_1delegate_3_01Ret_07Args_8_8_8_08_4_html_a24fbe634fda0fe5c67ec6deba0deaa66"><div class="ttname"><a href="classentt_1_1delegate_3_01Ret_07Args_8_8_8_08_4.html#a24fbe634fda0fe5c67ec6deba0deaa66">entt::delegate< Ret(Args...)>::delegate</a></div><div class="ttdeci">delegate(connect_arg_t< Candidate >, Type &value_or_instance) ENTT_NOEXCEPT</div><div class="ttdoc">Constructs a delegate and connects a member for a given instance or a free function with payload...</div><div class="ttdef"><b>Definition:</b> <a href="delegate_8hpp_source.html#l00164">delegate.hpp:164</a></div></div>
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<div class="ttc" id="namespaceentt_html_af1e73acd6f3d892955819677dc2664b7"><div class="ttname"><a href="namespaceentt.html#af1e73acd6f3d892955819677dc2664b7">entt::connect_arg</a></div><div class="ttdeci">constexpr connect_arg_t< Func > connect_arg</div><div class="ttdoc">Constant of type connect_arg_t used to disambiguate calls. </div><div class="ttdef"><b>Definition:</b> <a href="delegate_8hpp_source.html#l00076">delegate.hpp:76</a></div></div>
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<div class="ttc" id="structentt_1_1connect__arg__t_html"><div class="ttname"><a href="structentt_1_1connect__arg__t.html">entt::connect_arg_t</a></div><div class="ttdoc">Used to wrap a function or a member of a specified type. </div><div class="ttdef"><b>Definition:</b> <a href="delegate_8hpp_source.html#l00071">delegate.hpp:71</a></div></div>
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<div class="ttc" id="namespaceentt_html_a1a211752d12273a08015c524133e27c3"><div class="ttname"><a href="namespaceentt.html#a1a211752d12273a08015c524133e27c3">entt::operator!=</a></div><div class="ttdeci">constexpr bool operator!=(const basic_hashed_string< Char > &lhs, const basic_hashed_string< Char > &rhs) ENTT_NOEXCEPT</div><div class="ttdoc">Compares two hashed strings. </div><div class="ttdef"><b>Definition:</b> <a href="hashed__string_8hpp_source.html#l00217">hashed_string.hpp:217</a></div></div>
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<div class="ttc" id="namespaceentt_html"><div class="ttname"><a href="namespaceentt.html">entt</a></div><div class="ttdoc">EnTT default namespace. </div><div class="ttdef"><b>Definition:</b> <a href="algorithm_8hpp_source.html#l00012">algorithm.hpp:12</a></div></div>
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<div class="ttc" id="classentt_1_1delegate_3_01Ret_07Args_8_8_8_08_4_html_a6e732abcbc4aa9b8899c92d8f21e55a6"><div class="ttname"><a href="classentt_1_1delegate_3_01Ret_07Args_8_8_8_08_4.html#a6e732abcbc4aa9b8899c92d8f21e55a6">entt::delegate< Ret(Args...)>::connect</a></div><div class="ttdeci">void connect() ENTT_NOEXCEPT</div><div class="ttdoc">Connects a free function to a delegate. </div><div class="ttdef"><b>Definition:</b> <a href="delegate_8hpp_source.html#l00175">delegate.hpp:175</a></div></div>
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<div class="ttc" id="classentt_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#l00086">delegate.hpp:86</a></div></div>
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<div class="ttc" id="classentt_1_1delegate_3_01Ret_07Args_8_8_8_08_4_html_aae828d209ffe33590c2bb8e4b37f47ef"><div class="ttname"><a href="classentt_1_1delegate_3_01Ret_07Args_8_8_8_08_4.html#aae828d209ffe33590c2bb8e4b37f47ef">entt::delegate< Ret(Args...)>::connect</a></div><div class="ttdeci">void connect(Type &value_or_instance) ENTT_NOEXCEPT</div><div class="ttdoc">Connects a member function for a given instance or a free function with payload to a delegate...</div><div class="ttdef"><b>Definition:</b> <a href="delegate_8hpp_source.html#l00196">delegate.hpp:196</a></div></div>
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<div class="ttc" id="classentt_1_1delegate_3_01Ret_07Args_8_8_8_08_4_html_a3e0495b7612d458cbc59dc4b657d586f"><div class="ttname"><a href="classentt_1_1delegate_3_01Ret_07Args_8_8_8_08_4.html#a3e0495b7612d458cbc59dc4b657d586f">entt::delegate< Ret(Args...)>::instance</a></div><div class="ttdeci">const void * instance() const ENTT_NOEXCEPT</div><div class="ttdoc">Returns the instance or the payload linked to a delegate, if any. </div><div class="ttdef"><b>Definition:</b> <a href="delegate_8hpp_source.html#l00215">delegate.hpp:215</a></div></div>
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<div class="ttc" id="classentt_1_1delegate_3_01Ret_07Args_8_8_8_08_4_html_a0e53caedb53810bc96aa71bce199c990"><div class="ttname"><a href="classentt_1_1delegate_3_01Ret_07Args_8_8_8_08_4.html#a0e53caedb53810bc96aa71bce199c990">entt::delegate< Ret(Args...)>::operator()</a></div><div class="ttdeci">Ret operator()(Args... args) const</div><div class="ttdoc">Triggers a delegate. </div><div class="ttdef"><b>Definition:</b> <a href="delegate_8hpp_source.html#l00233">delegate.hpp:233</a></div></div>
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<div class="ttc" id="classentt_1_1delegate_3_01Ret_07Args_8_8_8_08_4_html_a235927a00f56e4b56dbfdc4e6cf5ddb4"><div class="ttname"><a href="classentt_1_1delegate_3_01Ret_07Args_8_8_8_08_4.html#a235927a00f56e4b56dbfdc4e6cf5ddb4">entt::delegate< Ret(Args...)>::function_type</a></div><div class="ttdeci">Ret(Args...) function_type</div><div class="ttdoc">Function type of the delegate. </div><div class="ttdef"><b>Definition:</b> <a href="delegate_8hpp_source.html#l00138">delegate.hpp:138</a></div></div>
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<div class="ttc" id="classentt_1_1delegate_3_01Ret_07Args_8_8_8_08_4_html_a0d81bb1bde6abd78914cd0a07084bcd7"><div class="ttname"><a href="classentt_1_1delegate_3_01Ret_07Args_8_8_8_08_4.html#a0d81bb1bde6abd78914cd0a07084bcd7">entt::delegate< Ret(Args...)>::reset</a></div><div class="ttdeci">void reset() ENTT_NOEXCEPT</div><div class="ttdoc">Resets a delegate. </div><div class="ttdef"><b>Definition:</b> <a href="delegate_8hpp_source.html#l00206">delegate.hpp:206</a></div></div>
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<div class="ttc" id="classentt_1_1delegate_3_01Ret_07Args_8_8_8_08_4_html_ad07c76f552619d55edc17a3722958215"><div class="ttname"><a href="classentt_1_1delegate_3_01Ret_07Args_8_8_8_08_4.html#ad07c76f552619d55edc17a3722958215">entt::delegate< Ret(Args...)>::delegate</a></div><div class="ttdeci">delegate(connect_arg_t< Function >) ENTT_NOEXCEPT</div><div class="ttdoc">Constructs a delegate and connects a free function to it. </div><div class="ttdef"><b>Definition:</b> <a href="delegate_8hpp_source.html#l00150">delegate.hpp:150</a></div></div>
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<div class="ttc" id="namespaceentt_html_aeda304d14f286ffcb1d872a6ef526745"><div class="ttname"><a href="namespaceentt.html#aeda304d14f286ffcb1d872a6ef526745">entt::delegate</a></div><div class="ttdeci">delegate(connect_arg_t< Function >) ENTT_NOEXCEPT -> delegate< std::remove_pointer_t< decltype(internal::to_function_pointer(Function))>></div><div class="ttdoc">Deduction guide. </div></div>
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<div class="ttc" id="classentt_1_1delegate_3_01Ret_07Args_8_8_8_08_4_html_a5c4828a5df5ed1e8fd18465ff63eb73c"><div class="ttname"><a href="classentt_1_1delegate_3_01Ret_07Args_8_8_8_08_4.html#a5c4828a5df5ed1e8fd18465ff63eb73c">entt::delegate< Ret(Args...)>::delegate</a></div><div class="ttdeci">delegate() ENTT_NOEXCEPT</div><div class="ttdoc">Default constructor. </div><div class="ttdef"><b>Definition:</b> <a href="delegate_8hpp_source.html#l00141">delegate.hpp:141</a></div></div>
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<div class="ttc" id="classentt_1_1delegate_3_01Ret_07Args_8_8_8_08_4_html_a54ca30c9a3f7a9662363c48db4e86aae"><div class="ttname"><a href="classentt_1_1delegate_3_01Ret_07Args_8_8_8_08_4.html#a54ca30c9a3f7a9662363c48db4e86aae">entt::delegate< Ret(Args...)>::operator==</a></div><div class="ttdeci">bool operator==(const delegate< Ret(Args...)> &other) const ENTT_NOEXCEPT</div><div class="ttdoc">Compares the contents of two delegates. </div><div class="ttdef"><b>Definition:</b> <a href="delegate_8hpp_source.html#l00252">delegate.hpp:252</a></div></div>
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