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<div id="projectname">simdjson<span id="projectnumber"> 4.6.4</span>
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<div id="projectbrief">Ridiculously Fast JSON</div>
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<div class="fragment"><div class="line"><a id="l00001" name="l00001"></a><span class="lineno"> 1</span><span class="preprocessor">#ifndef SIMDJSON_CONCEPTS_H</span></div>
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<div class="line"><a id="l00002" name="l00002"></a><span class="lineno"> 2</span><span class="preprocessor">#define SIMDJSON_CONCEPTS_H</span></div>
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<div class="line"><a id="l00003" name="l00003"></a><span class="lineno"> 3</span><span class="preprocessor">#if SIMDJSON_SUPPORTS_CONCEPTS</span></div>
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<div class="line"><a id="l00004" name="l00004"></a><span class="lineno"> 4</span> </div>
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<div class="line"><a id="l00005" name="l00005"></a><span class="lineno"> 5</span><span class="preprocessor">#include <concepts></span></div>
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<div class="line"><a id="l00006" name="l00006"></a><span class="lineno"> 6</span><span class="preprocessor">#include <type_traits></span></div>
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<div class="line"><a id="l00007" name="l00007"></a><span class="lineno"> 7</span> </div>
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<div class="line"><a id="l00008" name="l00008"></a><span class="lineno"> 8</span><span class="keyword">namespace </span><a class="code hl_namespace" href="namespacesimdjson.html">simdjson</a> {</div>
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<div class="line"><a id="l00009" name="l00009"></a><span class="lineno"> 9</span><span class="keyword">namespace </span>concepts {</div>
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<div class="line"><a id="l00010" name="l00010"></a><span class="lineno"> 10</span> </div>
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<div class="line"><a id="l00011" name="l00011"></a><span class="lineno"> 11</span><span class="keyword">namespace </span>details {</div>
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<div class="line"><a id="l00012" name="l00012"></a><span class="lineno"> 12</span><span class="preprocessor">#define SIMDJSON_IMPL_CONCEPT(name, method) \</span></div>
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<div class="line"><a id="l00013" name="l00013"></a><span class="lineno"> 13</span><span class="preprocessor"> template <typename T> \</span></div>
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<div class="line"><a id="l00014" name="l00014"></a><span class="lineno"> 14</span><span class="preprocessor"> concept supports_##name = !std::is_const_v<T> && requires { \</span></div>
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<div class="line"><a id="l00015" name="l00015"></a><span class="lineno"> 15</span><span class="preprocessor"> typename std::remove_cvref_t<T>::value_type; \</span></div>
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<div class="line"><a id="l00016" name="l00016"></a><span class="lineno"> 16</span><span class="preprocessor"> requires requires(typename std::remove_cvref_t<T>::value_type &&val, \</span></div>
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<div class="line"><a id="l00017" name="l00017"></a><span class="lineno"> 17</span><span class="preprocessor"> T obj) { \</span></div>
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<div class="line"><a id="l00018" name="l00018"></a><span class="lineno"> 18</span><span class="preprocessor"> obj.method(std::move(val)); \</span></div>
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<div class="line"><a id="l00019" name="l00019"></a><span class="lineno"> 19</span><span class="preprocessor"> requires !requires { obj = std::move(val); }; \</span></div>
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<div class="line"><a id="l00020" name="l00020"></a><span class="lineno"> 20</span><span class="preprocessor"> }; \</span></div>
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<div class="line"><a id="l00021" name="l00021"></a><span class="lineno"> 21</span><span class="preprocessor"> };</span></div>
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<div class="line"><a id="l00022" name="l00022"></a><span class="lineno"> 22</span> </div>
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<div class="line"><a id="l00023" name="l00023"></a><span class="lineno"> 23</span>SIMDJSON_IMPL_CONCEPT(emplace_back, emplace_back)</div>
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<div class="line"><a id="l00024" name="l00024"></a><span class="lineno"> 24</span>SIMDJSON_IMPL_CONCEPT(emplace, emplace)</div>
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<div class="line"><a id="l00025" name="l00025"></a><span class="lineno"> 25</span>SIMDJSON_IMPL_CONCEPT(push_back, push_back)</div>
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<div class="line"><a id="l00026" name="l00026"></a><span class="lineno"> 26</span>SIMDJSON_IMPL_CONCEPT(add, add)</div>
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<div class="line"><a id="l00027" name="l00027"></a><span class="lineno"> 27</span>SIMDJSON_IMPL_CONCEPT(push, push)</div>
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<div class="line"><a id="l00028" name="l00028"></a><span class="lineno"> 28</span>SIMDJSON_IMPL_CONCEPT(append, append)</div>
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<div class="line"><a id="l00029" name="l00029"></a><span class="lineno"> 29</span>SIMDJSON_IMPL_CONCEPT(insert, insert)</div>
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<div class="line"><a id="l00030" name="l00030"></a><span class="lineno"> 30</span>SIMDJSON_IMPL_CONCEPT(op_append, <span class="keyword">operator</span>+=)</div>
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<div class="line"><a id="l00031" name="l00031"></a><span class="lineno"> 31</span> </div>
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<div class="line"><a id="l00032" name="l00032"></a><span class="lineno"> 32</span><span class="preprocessor">#undef SIMDJSON_IMPL_CONCEPT</span></div>
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<div class="line"><a id="l00033" name="l00033"></a><span class="lineno"> 33</span>} <span class="comment">// namespace details</span></div>
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<div class="line"><a id="l00034" name="l00034"></a><span class="lineno"> 34</span> </div>
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<div class="line"><a id="l00035" name="l00035"></a><span class="lineno"> 35</span><span class="keyword">template</span> <<span class="keyword">typename</span> T></div>
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<div class="line"><a id="l00036" name="l00036"></a><span class="lineno"> 36</span><span class="keyword">concept </span>is_pair = <span class="keyword">requires</span> { <span class="keyword">typename</span> T::first_type; <span class="keyword">typename</span> T::second_type; } &&</div>
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<div class="line"><a id="l00037" name="l00037"></a><span class="lineno"> 37</span> std::same_as<T, std::pair<typename T::first_type, typename T::second_type>>;</div>
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<div class="line"><a id="l00038" name="l00038"></a><span class="lineno"> 38</span><span class="keyword">template</span> <<span class="keyword">typename</span> T></div>
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<div class="line"><a id="l00039" name="l00039"></a><span class="lineno"> 39</span><span class="keyword">concept </span>string_view_like = std::is_convertible_v<T, std::string_view> &&</div>
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<div class="line"><a id="l00040" name="l00040"></a><span class="lineno"> 40</span> !std::is_convertible_v<T, const char*>;</div>
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<div class="line"><a id="l00041" name="l00041"></a><span class="lineno"> 41</span> </div>
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<div class="line"><a id="l00042" name="l00042"></a><span class="lineno"> 42</span><span class="keyword">template</span><<span class="keyword">typename</span> T></div>
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<div class="line"><a id="l00043" name="l00043"></a><span class="lineno"> 43</span><span class="keyword">concept </span>constructible_from_string_view = std::is_constructible_v<T, std::string_view></div>
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<div class="line"><a id="l00044" name="l00044"></a><span class="lineno"> 44</span> && !std::is_same_v<T, std::string_view></div>
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<div class="line"><a id="l00045" name="l00045"></a><span class="lineno"> 45</span> && std::is_default_constructible_v<T>;</div>
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<div class="line"><a id="l00046" name="l00046"></a><span class="lineno"> 46</span> </div>
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<div class="line"><a id="l00047" name="l00047"></a><span class="lineno"> 47</span><span class="keyword">template</span><<span class="keyword">typename</span> M></div>
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<div class="line"><a id="l00048" name="l00048"></a><span class="lineno"> 48</span><span class="keyword">concept </span>string_view_keyed_map = string_view_like<typename M::key_type></div>
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<div class="line"><a id="l00049" name="l00049"></a><span class="lineno"> 49</span> && <span class="keyword">requires</span>(std::remove_cvref_t<M>& m, <span class="keyword">typename</span> M::key_type sv, <span class="keyword">typename</span> M::mapped_type v) {</div>
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<div class="line"><a id="l00050" name="l00050"></a><span class="lineno"> 50</span> { m.emplace(sv, v) } -> std::same_as<std::pair<typename M::iterator, bool>>;</div>
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<div class="line"><a id="l00051" name="l00051"></a><span class="lineno"> 51</span>};</div>
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<div class="line"><a id="l00052" name="l00052"></a><span class="lineno"> 52</span> </div>
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<div class="line"><a id="l00055" name="l00055"></a><span class="lineno"> 55</span><span class="keyword">template</span> <<span class="keyword">typename</span> T></div>
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<div class="line"><a id="l00056" name="l00056"></a><span class="lineno"> 56</span><span class="keyword">concept </span>appendable_containers =</div>
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<div class="line"><a id="l00057" name="l00057"></a><span class="lineno"> 57</span> (details::supports_emplace_back<T> || details::supports_emplace<T> ||</div>
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<div class="line"><a id="l00058" name="l00058"></a><span class="lineno"> 58</span> details::supports_push_back<T> || details::supports_push<T> ||</div>
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<div class="line"><a id="l00059" name="l00059"></a><span class="lineno"> 59</span> details::supports_add<T> || details::supports_append<T> ||</div>
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<div class="line"><a id="l00060" name="l00060"></a><span class="lineno"> 60</span> details::supports_insert<T>) && !string_view_keyed_map<T>;</div>
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<div class="line"><a id="l00061" name="l00061"></a><span class="lineno"> 61</span> </div>
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<div class="line"><a id="l00063" name="l00063"></a><span class="lineno"> 63</span><span class="keyword">template</span> <appendable_containers T, <span class="keyword">typename</span>... Args></div>
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<div class="line"><a id="l00064" name="l00064"></a><span class="lineno"> 64</span><span class="keyword">constexpr</span> <span class="keyword">decltype</span>(<span class="keyword">auto</span>) emplace_one(T &vec, Args &&...args) {</div>
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<div class="line"><a id="l00065" name="l00065"></a><span class="lineno"> 65</span> <span class="keywordflow">if</span> <span class="keyword">constexpr</span> (details::supports_emplace_back<T>) {</div>
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<div class="line"><a id="l00066" name="l00066"></a><span class="lineno"> 66</span> <span class="keywordflow">return</span> vec.emplace_back(std::forward<Args>(args)...);</div>
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<div class="line"><a id="l00067" name="l00067"></a><span class="lineno"> 67</span> } <span class="keywordflow">else</span> <span class="keywordflow">if</span> <span class="keyword">constexpr</span> (details::supports_emplace<T>) {</div>
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<div class="line"><a id="l00068" name="l00068"></a><span class="lineno"> 68</span> <span class="keywordflow">return</span> vec.emplace(std::forward<Args>(args)...);</div>
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<div class="line"><a id="l00069" name="l00069"></a><span class="lineno"> 69</span> } <span class="keywordflow">else</span> <span class="keywordflow">if</span> <span class="keyword">constexpr</span> (details::supports_push_back<T>) {</div>
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<div class="line"><a id="l00070" name="l00070"></a><span class="lineno"> 70</span> <span class="keywordflow">return</span> vec.push_back(std::forward<Args>(args)...);</div>
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<div class="line"><a id="l00071" name="l00071"></a><span class="lineno"> 71</span> } <span class="keywordflow">else</span> <span class="keywordflow">if</span> <span class="keyword">constexpr</span> (details::supports_push<T>) {</div>
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<div class="line"><a id="l00072" name="l00072"></a><span class="lineno"> 72</span> <span class="keywordflow">return</span> vec.push(std::forward<Args>(args)...);</div>
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<div class="line"><a id="l00073" name="l00073"></a><span class="lineno"> 73</span> } <span class="keywordflow">else</span> <span class="keywordflow">if</span> <span class="keyword">constexpr</span> (details::supports_add<T>) {</div>
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<div class="line"><a id="l00074" name="l00074"></a><span class="lineno"> 74</span> <span class="keywordflow">return</span> vec.add(std::forward<Args>(args)...);</div>
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<div class="line"><a id="l00075" name="l00075"></a><span class="lineno"> 75</span> } <span class="keywordflow">else</span> <span class="keywordflow">if</span> <span class="keyword">constexpr</span> (details::supports_append<T>) {</div>
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<div class="line"><a id="l00076" name="l00076"></a><span class="lineno"> 76</span> <span class="keywordflow">return</span> vec.append(std::forward<Args>(args)...);</div>
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<div class="line"><a id="l00077" name="l00077"></a><span class="lineno"> 77</span> } <span class="keywordflow">else</span> <span class="keywordflow">if</span> <span class="keyword">constexpr</span> (details::supports_insert<T>) {</div>
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<div class="line"><a id="l00078" name="l00078"></a><span class="lineno"> 78</span> <span class="keywordflow">return</span> vec.insert(std::forward<Args>(args)...);</div>
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<div class="line"><a id="l00079" name="l00079"></a><span class="lineno"> 79</span> } <span class="keywordflow">else</span> <span class="keywordflow">if</span> <span class="keyword">constexpr</span> (details::supports_op_append<T> && <span class="keyword">sizeof</span>...(Args) == 1) {</div>
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<div class="line"><a id="l00080" name="l00080"></a><span class="lineno"> 80</span> <span class="keywordflow">return</span> vec.operator+=(std::forward<Args>(args)...);</div>
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<div class="line"><a id="l00081" name="l00081"></a><span class="lineno"> 81</span> } <span class="keywordflow">else</span> {</div>
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<div class="line"><a id="l00082" name="l00082"></a><span class="lineno"> 82</span> <span class="keyword">static_assert</span>(!<span class="keyword">sizeof</span>(T *),</div>
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<div class="line"><a id="l00083" name="l00083"></a><span class="lineno"> 83</span> <span class="stringliteral">"We don't know how to add things to this container"</span>);</div>
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<div class="line"><a id="l00084" name="l00084"></a><span class="lineno"> 84</span> }</div>
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<div class="line"><a id="l00085" name="l00085"></a><span class="lineno"> 85</span>}</div>
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<div class="line"><a id="l00086" name="l00086"></a><span class="lineno"> 86</span> </div>
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<div class="line"><a id="l00090" name="l00090"></a><span class="lineno"> 90</span><span class="keyword">template</span> <<span class="keyword">typename</span> T></div>
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<div class="line"><a id="l00091" name="l00091"></a><span class="lineno"> 91</span><span class="keyword">concept </span>returns_reference = appendable_containers<T> && <span class="keyword">requires</span> {</div>
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<div class="line"><a id="l00092" name="l00092"></a><span class="lineno"> 92</span> <span class="keyword">typename</span> std::remove_cvref_t<T>::reference;</div>
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<div class="line"><a id="l00093" name="l00093"></a><span class="lineno"> 93</span> <span class="keyword">requires</span> <span class="keyword">requires</span>(<span class="keyword">typename</span> std::remove_cvref_t<T>::value_type &&val, T obj) {</div>
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<div class="line"><a id="l00094" name="l00094"></a><span class="lineno"> 94</span> {</div>
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<div class="line"><a id="l00095" name="l00095"></a><span class="lineno"> 95</span> emplace_one(obj, std::move(val))</div>
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<div class="line"><a id="l00096" name="l00096"></a><span class="lineno"> 96</span> } -> std::same_as<typename std::remove_cvref_t<T>::reference>;</div>
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<div class="line"><a id="l00097" name="l00097"></a><span class="lineno"> 97</span> };</div>
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<div class="line"><a id="l00098" name="l00098"></a><span class="lineno"> 98</span>};</div>
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<div class="line"><a id="l00099" name="l00099"></a><span class="lineno"> 99</span> </div>
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<div class="line"><a id="l00100" name="l00100"></a><span class="lineno"> 100</span><span class="keyword">template</span> <<span class="keyword">typename</span> T></div>
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<div class="line"><a id="l00101" name="l00101"></a><span class="lineno"> 101</span><span class="keyword">concept </span>smart_pointer = <span class="keyword">requires</span>(std::remove_cvref_t<T> ptr) {</div>
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<div class="line"><a id="l00102" name="l00102"></a><span class="lineno"> 102</span> <span class="comment">// Check if T has a member type named element_type</span></div>
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<div class="line"><a id="l00103" name="l00103"></a><span class="lineno"> 103</span> <span class="keyword">typename</span> std::remove_cvref_t<T>::element_type;</div>
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<div class="line"><a id="l00104" name="l00104"></a><span class="lineno"> 104</span> </div>
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<div class="line"><a id="l00105" name="l00105"></a><span class="lineno"> 105</span> <span class="comment">// Check if T has a get() member function</span></div>
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<div class="line"><a id="l00106" name="l00106"></a><span class="lineno"> 106</span> {</div>
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<div class="line"><a id="l00107" name="l00107"></a><span class="lineno"> 107</span> ptr.get()</div>
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<div class="line"><a id="l00108" name="l00108"></a><span class="lineno"> 108</span> } -> std::same_as<typename std::remove_cvref_t<T>::element_type *>;</div>
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<div class="line"><a id="l00109" name="l00109"></a><span class="lineno"> 109</span> </div>
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<div class="line"><a id="l00110" name="l00110"></a><span class="lineno"> 110</span> <span class="comment">// Check if T can be dereferenced</span></div>
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<div class="line"><a id="l00111" name="l00111"></a><span class="lineno"> 111</span> { *ptr } -> std::same_as<typename std::remove_cvref_t<T>::element_type &>;</div>
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<div class="line"><a id="l00112" name="l00112"></a><span class="lineno"> 112</span>};</div>
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<div class="line"><a id="l00113" name="l00113"></a><span class="lineno"> 113</span> </div>
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<div class="line"><a id="l00114" name="l00114"></a><span class="lineno"> 114</span><span class="keyword">template</span> <<span class="keyword">typename</span> T></div>
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<div class="line"><a id="l00115" name="l00115"></a><span class="lineno"> 115</span><span class="keyword">concept </span>optional_type = <span class="keyword">requires</span>(std::remove_cvref_t<T> obj) {</div>
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<div class="line"><a id="l00116" name="l00116"></a><span class="lineno"> 116</span> <span class="keyword">typename</span> std::remove_cvref_t<T>::value_type;</div>
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<div class="line"><a id="l00117" name="l00117"></a><span class="lineno"> 117</span> { obj.value() } -> std::same_as<typename std::remove_cvref_t<T>::value_type&>;</div>
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<div class="line"><a id="l00118" name="l00118"></a><span class="lineno"> 118</span> <span class="keyword">requires</span> <span class="keyword">requires</span>(<span class="keyword">typename</span> std::remove_cvref_t<T>::value_type &&val) {</div>
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<div class="line"><a id="l00119" name="l00119"></a><span class="lineno"> 119</span> obj.emplace(std::move(val));</div>
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<div class="line"><a id="l00120" name="l00120"></a><span class="lineno"> 120</span> {</div>
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<div class="line"><a id="l00121" name="l00121"></a><span class="lineno"> 121</span> obj.value_or(val)</div>
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<div class="line"><a id="l00122" name="l00122"></a><span class="lineno"> 122</span> } -> std::convertible_to<typename std::remove_cvref_t<T>::value_type>;</div>
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<div class="line"><a id="l00123" name="l00123"></a><span class="lineno"> 123</span> };</div>
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<div class="line"><a id="l00124" name="l00124"></a><span class="lineno"> 124</span> { <span class="keyword">static_cast<</span><span class="keywordtype">bool</span><span class="keyword">></span>(obj) } -> std::same_as<bool>; <span class="comment">// convertible to bool</span></div>
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<div class="line"><a id="l00125" name="l00125"></a><span class="lineno"> 125</span> { obj.reset() } <span class="keyword">noexcept</span> -> std::same_as<void>;</div>
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<div class="line"><a id="l00126" name="l00126"></a><span class="lineno"> 126</span>};</div>
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<div class="line"><a id="l00127" name="l00127"></a><span class="lineno"> 127</span> </div>
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<div class="line"><a id="l00128" name="l00128"></a><span class="lineno"> 128</span> </div>
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<div class="line"><a id="l00129" name="l00129"></a><span class="lineno"> 129</span> </div>
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<div class="line"><a id="l00130" name="l00130"></a><span class="lineno"> 130</span><span class="comment">// Types we serialize as JSON strings (not as containers)</span></div>
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<div class="line"><a id="l00131" name="l00131"></a><span class="lineno"> 131</span><span class="keyword">template</span> <<span class="keyword">typename</span> T></div>
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<div class="line"><a id="l00132" name="l00132"></a><span class="lineno"> 132</span><span class="keyword">concept </span>string_like =</div>
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<div class="line"><a id="l00133" name="l00133"></a><span class="lineno"> 133</span> std::is_same_v<std::remove_cvref_t<T>, std::string> ||</div>
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<div class="line"><a id="l00134" name="l00134"></a><span class="lineno"> 134</span> std::is_same_v<std::remove_cvref_t<T>, std::string_view> ||</div>
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<div class="line"><a id="l00135" name="l00135"></a><span class="lineno"> 135</span> std::is_same_v<std::remove_cvref_t<T>, <span class="keyword">const</span> <span class="keywordtype">char</span>*> ||</div>
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<div class="line"><a id="l00136" name="l00136"></a><span class="lineno"> 136</span> std::is_same_v<std::remove_cvref_t<T>, <span class="keywordtype">char</span>*>;</div>
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<div class="line"><a id="l00137" name="l00137"></a><span class="lineno"> 137</span> </div>
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<div class="line"><a id="l00138" name="l00138"></a><span class="lineno"> 138</span><span class="comment">// Concept that checks if a type is a container but not a string (because</span></div>
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<div class="line"><a id="l00139" name="l00139"></a><span class="lineno"> 139</span><span class="comment">// strings handling must be handled differently)</span></div>
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<div class="line"><a id="l00140" name="l00140"></a><span class="lineno"> 140</span><span class="comment">// Now uses iterator-based approach for broader container support</span></div>
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<div class="line"><a id="l00141" name="l00141"></a><span class="lineno"> 141</span><span class="keyword">template</span> <<span class="keyword">typename</span> T></div>
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<div class="line"><a id="l00142" name="l00142"></a><span class="lineno"> 142</span><span class="keyword">concept </span>container_but_not_string =</div>
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<div class="line"><a id="l00143" name="l00143"></a><span class="lineno"> 143</span> std::ranges::input_range<T> && !string_like<T> && !concepts::string_view_keyed_map<T>;</div>
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<div class="line"><a id="l00144" name="l00144"></a><span class="lineno"> 144</span> </div>
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<div class="line"><a id="l00145" name="l00145"></a><span class="lineno"> 145</span> </div>
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<div class="line"><a id="l00146" name="l00146"></a><span class="lineno"> 146</span> </div>
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<div class="line"><a id="l00147" name="l00147"></a><span class="lineno"> 147</span><span class="comment">// Concept: Indexable container that is not a string or associative container</span></div>
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<div class="line"><a id="l00148" name="l00148"></a><span class="lineno"> 148</span><span class="comment">// Accepts: std::vector, std::array, std::deque (have operator[], value_type, not string_like)</span></div>
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<div class="line"><a id="l00149" name="l00149"></a><span class="lineno"> 149</span><span class="comment">// Rejects: std::string (string_like), std::list (no operator[]), std::map (has key_type)</span></div>
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<div class="line"><a id="l00150" name="l00150"></a><span class="lineno"> 150</span><span class="keyword">template</span><<span class="keyword">typename</span> Container></div>
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<div class="line"><a id="l00151" name="l00151"></a><span class="lineno"> 151</span><span class="keyword">concept </span>indexable_container = <span class="keyword">requires</span> {</div>
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<div class="line"><a id="l00152" name="l00152"></a><span class="lineno"> 152</span> <span class="keyword">typename</span> Container::value_type;</div>
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<div class="line"><a id="l00153" name="l00153"></a><span class="lineno"> 153</span> <span class="keyword">requires</span> !concepts::string_like<Container>;</div>
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<div class="line"><a id="l00154" name="l00154"></a><span class="lineno"> 154</span> <span class="keyword">requires</span> !<span class="keyword">requires</span> { <span class="keyword">typename</span> Container::key_type; }; <span class="comment">// Reject maps/sets</span></div>
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<div class="line"><a id="l00155" name="l00155"></a><span class="lineno"> 155</span> <span class="keyword">requires</span> <span class="keyword">requires</span>(Container& c, std::size_t i) {</div>
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<div class="line"><a id="l00156" name="l00156"></a><span class="lineno"> 156</span> { c[i] } -> std::convertible_to<typename Container::value_type>;</div>
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<div class="line"><a id="l00157" name="l00157"></a><span class="lineno"> 157</span> };</div>
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<div class="line"><a id="l00158" name="l00158"></a><span class="lineno"> 158</span>};</div>
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<div class="line"><a id="l00159" name="l00159"></a><span class="lineno"> 159</span> </div>
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<div class="line"><a id="l00160" name="l00160"></a><span class="lineno"> 160</span> </div>
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<div class="line"><a id="l00161" name="l00161"></a><span class="lineno"> 161</span><span class="comment">// Variable template to use with std::meta::substitute</span></div>
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<div class="line"><a id="l00162" name="l00162"></a><span class="lineno"> 162</span><span class="keyword">template</span><<span class="keyword">typename</span> Container></div>
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<div class="line"><a id="l00163" name="l00163"></a><span class="lineno"> 163</span><span class="keyword">constexpr</span> <span class="keywordtype">bool</span> indexable_container_v = indexable_container<Container>;</div>
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<div class="line"><a id="l00164" name="l00164"></a><span class="lineno"> 164</span> </div>
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<div class="line"><a id="l00165" name="l00165"></a><span class="lineno"> 165</span>} <span class="comment">// namespace concepts</span></div>
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<div class="line"><a id="l00166" name="l00166"></a><span class="lineno"> 166</span> </div>
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<div class="line"><a id="l00167" name="l00167"></a><span class="lineno"> 167</span> </div>
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<div class="line"><a id="l00171" name="l00171"></a><span class="lineno"> 171</span><span class="keyword">template</span> <<span class="keyword">typename</span> Tag, <span class="keyword">typename</span>... Args></div>
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<div class="line"><a id="l00172" name="l00172"></a><span class="lineno"> 172</span><span class="keyword">concept </span>tag_invocable = <span class="keyword">requires</span>(Tag tag, Args... args) {</div>
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<div class="line"><a id="l00173" name="l00173"></a><span class="lineno"> 173</span> tag_invoke(std::forward<Tag>(tag), std::forward<Args>(args)...);</div>
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<div class="line"><a id="l00174" name="l00174"></a><span class="lineno"> 174</span>};</div>
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<div class="line"><a id="l00175" name="l00175"></a><span class="lineno"> 175</span> </div>
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<div class="line"><a id="l00176" name="l00176"></a><span class="lineno"> 176</span><span class="keyword">template</span> <<span class="keyword">typename</span> Tag, <span class="keyword">typename</span>... Args></div>
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<div class="line"><a id="l00177" name="l00177"></a><span class="lineno"> 177</span><span class="keyword">concept </span>nothrow_tag_invocable =</div>
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<div class="line"><a id="l00178" name="l00178"></a><span class="lineno"> 178</span> tag_invocable<Tag, Args...> && <span class="keyword">requires</span>(Tag tag, Args... args) {</div>
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<div class="line"><a id="l00179" name="l00179"></a><span class="lineno"> 179</span> {</div>
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<div class="line"><a id="l00180" name="l00180"></a><span class="lineno"> 180</span> tag_invoke(std::forward<Tag>(tag), std::forward<Args>(args)...)</div>
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<div class="line"><a id="l00181" name="l00181"></a><span class="lineno"> 181</span> } <span class="keyword">noexcept</span>;</div>
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<div class="line"><a id="l00182" name="l00182"></a><span class="lineno"> 182</span> };</div>
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<div class="line"><a id="l00183" name="l00183"></a><span class="lineno"> 183</span> </div>
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<div class="line"><a id="l00184" name="l00184"></a><span class="lineno"> 184</span>} <span class="comment">// namespace simdjson</span></div>
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<div class="line"><a id="l00185" name="l00185"></a><span class="lineno"> 185</span><span class="preprocessor">#endif </span><span class="comment">// SIMDJSON_SUPPORTS_CONCEPTS</span></div>
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<div class="line"><a id="l00186" name="l00186"></a><span class="lineno"> 186</span><span class="preprocessor">#endif </span><span class="comment">// SIMDJSON_CONCEPTS_H</span></div>
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<div class="ttc" id="anamespacesimdjson_html"><div class="ttname"><a href="namespacesimdjson.html">simdjson</a></div><div class="ttdoc">The top level simdjson namespace, containing everything the library provides.</div><div class="ttdef"><b>Definition</b> <a href="arm64_2base_8h_source.html#l00008">base.h:8</a></div></div>
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