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<a href="optional_8hpp.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="preprocessor">#ifndef LIBFILEZILLA_OPTIONAL_HEADER</span></div><div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="preprocessor">#define LIBFILEZILLA_OPTIONAL_HEADER</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="l00009"></a><span class="lineno"> 9</span> <span class="keyword">namespace </span><a class="code" href="namespacefz.html">fz</a> {</div><div class="line"><a name="l00010"></a><span class="lineno"> 10</span> </div><div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="keyword">template</span><<span class="keyword">typename</span> T></div><div class="line"><a name="l00019"></a><span class="lineno"><a class="line" href="classfz_1_1sparse__optional.html"> 19</a></span> <span class="keyword">class </span><a class="code" href="classfz_1_1sparse__optional.html">sparse_optional</a> final</div><div class="line"><a name="l00020"></a><span class="lineno"> 20</span> {</div><div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="keyword">public</span>:</div><div class="line"><a name="l00022"></a><span class="lineno"> 22</span>  <a class="code" href="classfz_1_1sparse__optional.html">sparse_optional</a>();</div><div class="line"><a name="l00023"></a><span class="lineno"> 23</span>  <span class="keyword">explicit</span> <a class="code" href="classfz_1_1sparse__optional.html">sparse_optional</a>(T <span class="keyword">const</span>& v);</div><div class="line"><a name="l00024"></a><span class="lineno"> 24</span> </div><div class="line"><a name="l00026"></a><span class="lineno"> 26</span>  <span class="keyword">explicit</span> <a class="code" href="classfz_1_1sparse__optional.html">sparse_optional</a>(T * v);</div><div class="line"><a name="l00027"></a><span class="lineno"> 27</span> </div><div class="line"><a name="l00028"></a><span class="lineno"> 28</span>  <a class="code" href="classfz_1_1sparse__optional.html">sparse_optional</a>(<a class="code" href="classfz_1_1sparse__optional.html">sparse_optional<T></a> <span class="keyword">const</span>& v);</div><div class="line"><a name="l00029"></a><span class="lineno"> 29</span>  <a class="code" href="classfz_1_1sparse__optional.html">sparse_optional</a>(<a class="code" href="classfz_1_1sparse__optional.html">sparse_optional<T></a> && v) noexcept;</div><div class="line"><a name="l00030"></a><span class="lineno"> 30</span>  ~<a class="code" href="classfz_1_1sparse__optional.html">sparse_optional</a>();</div><div class="line"><a name="l00031"></a><span class="lineno"> 31</span> </div><div class="line"><a name="l00032"></a><span class="lineno"> 32</span>  <span class="keywordtype">void</span> clear();</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">explicit</span> <span class="keyword">operator</span> bool()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> v_ != <span class="keyword">nullptr</span>; };</div><div class="line"><a name="l00035"></a><span class="lineno"> 35</span> </div><div class="line"><a name="l00036"></a><span class="lineno"> 36</span>  T& operator*() { <span class="keywordflow">return</span> *v_; }</div><div class="line"><a name="l00037"></a><span class="lineno"> 37</span>  T <span class="keyword">const</span>& operator*()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> *v_; }</div><div class="line"><a name="l00038"></a><span class="lineno"> 38</span> </div><div class="line"><a name="l00039"></a><span class="lineno"> 39</span>  T* operator->() { <span class="keywordflow">return</span> v_; }</div><div class="line"><a name="l00040"></a><span class="lineno"> 40</span>  T <span class="keyword">const</span>* operator->()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> v_; }</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="keywordtype">bool</span> operator==(<a class="code" href="classfz_1_1sparse__optional.html">sparse_optional<T></a> <span class="keyword">const</span>& cmp) <span class="keyword">const</span>;</div><div class="line"><a name="l00043"></a><span class="lineno"> 43</span>  <span class="keyword">inline</span> <span class="keywordtype">bool</span> operator!=(<a class="code" href="classfz_1_1sparse__optional.html">sparse_optional<T></a> <span class="keyword">const</span>& cmp)<span class="keyword"> const </span>{ <span class="keywordflow">return</span> !(*<span class="keyword">this</span> == cmp); }</div><div class="line"><a name="l00044"></a><span class="lineno"> 44</span>  <span class="keywordtype">bool</span> operator<(<a class="code" href="classfz_1_1sparse__optional.html">sparse_optional<T></a> <span class="keyword">const</span>& cmp) <span class="keyword">const</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>  <a class="code" href="classfz_1_1sparse__optional.html">sparse_optional<T></a>& operator=(<a class="code" href="classfz_1_1sparse__optional.html">sparse_optional<T></a> <span class="keyword">const</span>& v);</div><div class="line"><a name="l00047"></a><span class="lineno"> 47</span>  <a class="code" href="classfz_1_1sparse__optional.html">sparse_optional<T></a>& operator=(<a class="code" href="classfz_1_1sparse__optional.html">sparse_optional<T></a> && v) noexcept;</div><div class="line"><a name="l00048"></a><span class="lineno"> 48</span> <span class="keyword">private</span>:</div><div class="line"><a name="l00049"></a><span class="lineno"> 49</span>  T* v_;</div><div class="line"><a name="l00050"></a><span class="lineno"> 50</span> };</div><div class="line"><a name="l00051"></a><span class="lineno"> 51</span> </div><div class="line"><a name="l00052"></a><span class="lineno"> 52</span> </div><div class="line"><a name="l00053"></a><span class="lineno"> 53</span> <span class="keyword">template</span><<span class="keyword">typename</span> T></div><div class="line"><a name="l00054"></a><span class="lineno"> 54</span> <a class="code" href="classfz_1_1sparse__optional.html">sparse_optional<T>::sparse_optional</a>()</div><div class="line"><a name="l00055"></a><span class="lineno"> 55</span>  : v_()</div><div class="line"><a name="l00056"></a><span class="lineno"> 56</span> {</div><div class="line"><a name="l00057"></a><span class="lineno"> 57</span> }</div><div class="line"><a name="l00058"></a><span class="lineno"> 58</span> </div><div class="line"><a name="l00059"></a><span class="lineno"> 59</span> <span class="keyword">template</span><<span class="keyword">typename</span> T></div><div class="line"><a name="l00060"></a><span class="lineno"> 60</span> sparse_optional<T>::sparse_optional(T <span class="keyword">const</span>& v)</div><div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  : v_(new T(v))</div><div class="line"><a name="l00062"></a><span class="lineno"> 62</span> {</div><div class="line"><a name="l00063"></a><span class="lineno"> 63</span> }</div><div class="line"><a name="l00064"></a><span class="lineno"> 64</span> </div><div class="line"><a name="l00065"></a><span class="lineno"> 65</span> <span class="keyword">template</span><<span class="keyword">typename</span> T></div><div class="line"><a name="l00066"></a><span class="lineno"><a class="line" href="classfz_1_1sparse__optional.html#ad1c533a78ede9ce33902d5fe76b887d0"> 66</a></span> <a class="code" href="classfz_1_1sparse__optional.html">sparse_optional<T>::sparse_optional</a>(T * v)</div><div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  : v_(v)</div><div class="line"><a name="l00068"></a><span class="lineno"> 68</span> {</div><div class="line"><a name="l00069"></a><span class="lineno"> 69</span> }</div><div class="line"><a name="l00070"></a><span class="lineno"> 70</span> </div><div class="line"><a name="l00071"></a><span class="lineno"> 71</span> <span class="keyword">template</span><<span class="keyword">typename</span> T></div><div class="line"><a name="l00072"></a><span class="lineno"> 72</span> <a class="code" href="classfz_1_1sparse__optional.html">sparse_optional<T>::sparse_optional</a>(<a class="code" href="classfz_1_1sparse__optional.html">sparse_optional<T></a> <span class="keyword">const</span>& v)</div><div class="line"><a name="l00073"></a><span class="lineno"> 73</span> {</div><div class="line"><a name="l00074"></a><span class="lineno"> 74</span>  <span class="keywordflow">if</span> (v) {</div><div class="line"><a name="l00075"></a><span class="lineno"> 75</span>  v_ = <span class="keyword">new</span> T(*v);</div><div class="line"><a name="l00076"></a><span class="lineno"> 76</span>  }</div><div class="line"><a name="l00077"></a><span class="lineno"> 77</span>  <span class="keywordflow">else</span> {</div><div class="line"><a name="l00078"></a><span class="lineno"> 78</span>  v_ = <span class="keyword">nullptr</span>;</div><div class="line"><a name="l00079"></a><span class="lineno"> 79</span>  }</div><div class="line"><a name="l00080"></a><span class="lineno"> 80</span> }</div><div class="line"><a name="l00081"></a><span class="lineno"> 81</span> </div><div class="line"><a name="l00082"></a><span class="lineno"> 82</span> <span class="keyword">template</span><<span class="keyword">typename</span> T></div><div class="line"><a name="l00083"></a><span class="lineno"> 83</span> sparse_optional<T>::sparse_optional(sparse_optional<T> && v) noexcept</div><div class="line"><a name="l00084"></a><span class="lineno"> 84</span> {</div><div class="line"><a name="l00085"></a><span class="lineno"> 85</span>  v_ = v.v_;</div><div class="line"><a name="l00086"></a><span class="lineno"> 86</span>  v.v_ = <span class="keyword">nullptr</span>;</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="l00089"></a><span class="lineno"> 89</span> <span class="keyword">template</span><<span class="keyword">typename</span> T></div><div class="line"><a name="l00090"></a><span class="lineno"> 90</span> sparse_optional<T>::~sparse_optional()</div><div class="line"><a name="l00091"></a><span class="lineno"> 91</span> {</div><div class="line"><a name="l00092"></a><span class="lineno"> 92</span>  <span class="keyword">delete</span> v_;</div><div class="line"><a name="l00093"></a><span class="lineno"> 93</span> }</div><div class="line"><a name="l00094"></a><span class="lineno"> 94</span> </div><div class="line"><a name="l00095"></a><span class="lineno"> 95</span> <span class="keyword">template</span><<span class="keyword">typename</span> T></div><div class="line"><a name="l00096"></a><span class="lineno"> 96</span> <span class="keywordtype">void</span> sparse_optional<T>::clear()</div><div class="line"><a name="l00097"></a><span class="lineno"> 97</span> {</div><div class="line"><a name="l00098"></a><span class="lineno"> 98</span>  <span class="keyword">delete</span> v_;</div><div class="line"><a name="l00099"></a><span class="lineno"> 99</span>  v_ = <span class="keyword">nullptr</span>;</div><div class="line"><a name="l00100"></a><span class="lineno"> 100</span> }</div><div class="line"><a name="l00101"></a><span class="lineno"> 101</span> </div><div class="line"><a name="l00102"></a><span class="lineno"> 102</span> <span class="keyword">template</span><<span class="keyword">typename</span> T></div><div class="line"><a name="l00103"></a><span class="lineno"> 103</span> sparse_optional<T>& sparse_optional<T>::operator=(sparse_optional<T> <span class="keyword">const</span>& v)</div><div class="line"><a name="l00104"></a><span class="lineno"> 104</span> {</div><div class="line"><a name="l00105"></a><span class="lineno"> 105</span>  <span class="keywordflow">if</span> (<span class="keyword">this</span> != &v) {</div><div class="line"><a name="l00106"></a><span class="lineno"> 106</span>  <span class="keyword">delete</span> v_;</div><div class="line"><a name="l00107"></a><span class="lineno"> 107</span>  <span class="keywordflow">if</span> (v.v_) {</div><div class="line"><a name="l00108"></a><span class="lineno"> 108</span>  v_ = <span class="keyword">new</span> T(*v.v_);</div><div class="line"><a name="l00109"></a><span class="lineno"> 109</span>  }</div><div class="line"><a name="l00110"></a><span class="lineno"> 110</span>  <span class="keywordflow">else</span> {</div><div class="line"><a name="l00111"></a><span class="lineno"> 111</span>  v_ = <span class="keyword">nullptr</span>;</div><div class="line"><a name="l00112"></a><span class="lineno"> 112</span>  }</div><div class="line"><a name="l00113"></a><span class="lineno"> 113</span>  }</div><div class="line"><a name="l00114"></a><span class="lineno"> 114</span> </div><div class="line"><a name="l00115"></a><span class="lineno"> 115</span>  <span class="keywordflow">return</span> *<span class="keyword">this</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> </div><div class="line"><a name="l00118"></a><span class="lineno"> 118</span> <span class="keyword">template</span><<span class="keyword">typename</span> T></div><div class="line"><a name="l00119"></a><span class="lineno"> 119</span> sparse_optional<T>& sparse_optional<T>::operator=(sparse_optional<T> && v) noexcept</div><div class="line"><a name="l00120"></a><span class="lineno"> 120</span> {</div><div class="line"><a name="l00121"></a><span class="lineno"> 121</span>  <span class="keywordflow">if</span> (<span class="keyword">this</span> != &v) {</div><div class="line"><a name="l00122"></a><span class="lineno"> 122</span>  <span class="keyword">delete</span> v_;</div><div class="line"><a name="l00123"></a><span class="lineno"> 123</span>  v_ = v.v_;</div><div class="line"><a name="l00124"></a><span class="lineno"> 124</span>  v.v_ = <span class="keyword">nullptr</span>;</div><div class="line"><a name="l00125"></a><span class="lineno"> 125</span>  }</div><div class="line"><a name="l00126"></a><span class="lineno"> 126</span> </div><div class="line"><a name="l00127"></a><span class="lineno"> 127</span>  <span class="keywordflow">return</span> *<span class="keyword">this</span>;</div><div class="line"><a name="l00128"></a><span class="lineno"> 128</span> }</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> <span class="keyword">template</span><<span class="keyword">typename</span> T></div><div class="line"><a name="l00131"></a><span class="lineno"> 131</span> <span class="keywordtype">bool</span> sparse_optional<T>::operator==(sparse_optional<T> <span class="keyword">const</span>& cmp)<span class="keyword"> const</span></div><div class="line"><a name="l00132"></a><span class="lineno"> 132</span> <span class="keyword"></span>{</div><div class="line"><a name="l00133"></a><span class="lineno"> 133</span>  <span class="keywordflow">if</span> (!v_ && !cmp.v_) {</div><div class="line"><a name="l00134"></a><span class="lineno"> 134</span>  <span class="keywordflow">return</span> <span class="keyword">true</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> </div><div class="line"><a name="l00137"></a><span class="lineno"> 137</span>  <span class="keywordflow">if</span> (!v_ || !cmp.v_) {</div><div class="line"><a name="l00138"></a><span class="lineno"> 138</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l00139"></a><span class="lineno"> 139</span>  }</div><div class="line"><a name="l00140"></a><span class="lineno"> 140</span> </div><div class="line"><a name="l00141"></a><span class="lineno"> 141</span>  <span class="keywordflow">return</span> *v_ == *cmp.v_;</div><div class="line"><a name="l00142"></a><span class="lineno"> 142</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> <span class="keyword">template</span><<span class="keyword">typename</span> T></div><div class="line"><a name="l00145"></a><span class="lineno"> 145</span> <span class="keywordtype">bool</span> sparse_optional<T>::operator<(sparse_optional<T> <span class="keyword">const</span>& cmp)<span class="keyword"> const</span></div><div class="line"><a name="l00146"></a><span class="lineno"> 146</span> <span class="keyword"></span>{</div><div class="line"><a name="l00147"></a><span class="lineno"> 147</span>  <span class="keywordflow">if</span> (!v_ || !cmp.v_) {</div><div class="line"><a name="l00148"></a><span class="lineno"> 148</span>  <span class="keywordflow">return</span> cmp.v_ != <span class="keyword">nullptr</span>;</div><div class="line"><a name="l00149"></a><span class="lineno"> 149</span>  }</div><div class="line"><a name="l00150"></a><span class="lineno"> 150</span> </div><div class="line"><a name="l00151"></a><span class="lineno"> 151</span>  <span class="keywordflow">return</span> *v_ < *cmp.v_;</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> </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="l00156"></a><span class="lineno"> 156</span> <span class="preprocessor">#endif</span></div><div class="ttc" id="namespacefz_html"><div class="ttname"><a href="namespacefz.html">fz</a></div><div class="ttdoc">The namespace used by libfilezilla.</div><div class="ttdef"><b>Definition:</b> apply.hpp:17</div></div>
<div class="ttc" id="classfz_1_1sparse__optional_html"><div class="ttname"><a href="classfz_1_1sparse__optional.html">fz::sparse_optional</a></div><div class="ttdoc">Similar to C++17's std::optional, but stores the data in dynamic memory.</div><div class="ttdef"><b>Definition:</b> optional.hpp:19</div></div>
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