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<li class="navelem"><a class="el" href="dir_3c80010775d22af2067790ecc9cdcf9d.html">librf</a></li><li class="navelem"><a class="el" href="dir_54ae0e78d997f6903cdf0996223d047f.html">src</a></li> </ul>
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<div class="title">counted_ptr.h</div> </div>
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<div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="preprocessor">#pragma once</span></div>
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<div class="line"><a name="l00002"></a><span class="lineno"> 2</span>  </div>
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<div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="keyword">namespace </span>resumef</div>
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<div class="line"><a name="l00004"></a><span class="lineno"> 4</span> {</div>
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<div class="line"><a name="l00008"></a><span class="lineno"> 8</span>  <span class="keyword">template</span> <<span class="keyword">typename</span> T></div>
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<div class="line"><a name="l00009"></a><span class="lineno"><a class="line" href="structresumef_1_1counted__ptr.html"> 9</a></span>  <span class="keyword">struct </span><a class="code" href="structresumef_1_1counted__ptr.html">counted_ptr</a></div>
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<div class="line"><a name="l00010"></a><span class="lineno"> 10</span>  {</div>
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<div class="line"><a name="l00014"></a><span class="lineno"> 14</span>  <a class="code" href="structresumef_1_1counted__ptr.html#ad3969379af7311183c1c11d13f6da9f3">counted_ptr</a>() noexcept = <span class="keywordflow">default</span>;</div>
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<div class="line"><a name="l00015"></a><span class="lineno"> 15</span>  </div>
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<div class="line"><a name="l00019"></a><span class="lineno"><a class="line" href="structresumef_1_1counted__ptr.html#ad466495cf5a6056e326a923558676ccd"> 19</a></span>  <a class="code" href="structresumef_1_1counted__ptr.html#ad466495cf5a6056e326a923558676ccd">counted_ptr</a>(<span class="keyword">const</span> <a class="code" href="structresumef_1_1counted__ptr.html">counted_ptr</a>& cp) : _p(cp._p)</div>
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<div class="line"><a name="l00020"></a><span class="lineno"> 20</span>  {</div>
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<div class="line"><a name="l00021"></a><span class="lineno"> 21</span>  _lock();</div>
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<div class="line"><a name="l00022"></a><span class="lineno"> 22</span>  }</div>
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<div class="line"><a name="l00023"></a><span class="lineno"> 23</span>  </div>
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<div class="line"><a name="l00027"></a><span class="lineno"><a class="line" href="structresumef_1_1counted__ptr.html#ab752ffdd40c7ab1be06e7662488d8e24"> 27</a></span>  <a class="code" href="structresumef_1_1counted__ptr.html#ab752ffdd40c7ab1be06e7662488d8e24">counted_ptr</a>(T* p) : _p(p)</div>
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<div class="line"><a name="l00028"></a><span class="lineno"> 28</span>  {</div>
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<div class="line"><a name="l00029"></a><span class="lineno"> 29</span>  _lock();</div>
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<div class="line"><a name="l00030"></a><span class="lineno"> 30</span>  }</div>
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<div class="line"><a name="l00031"></a><span class="lineno"> 31</span>  </div>
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<div class="line"><a name="l00035"></a><span class="lineno"><a class="line" href="structresumef_1_1counted__ptr.html#a8b6f5332dd4754c22970f7e5406c6233"> 35</a></span>  <a class="code" href="structresumef_1_1counted__ptr.html#a8b6f5332dd4754c22970f7e5406c6233">counted_ptr</a>(<a class="code" href="structresumef_1_1counted__ptr.html">counted_ptr</a>&& cp) noexcept</div>
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<div class="line"><a name="l00036"></a><span class="lineno"> 36</span>  {</div>
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<div class="line"><a name="l00037"></a><span class="lineno"> 37</span>  std::swap(_p, cp._p);</div>
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<div class="line"><a name="l00038"></a><span class="lineno"> 38</span>  }</div>
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<div class="line"><a name="l00039"></a><span class="lineno"> 39</span>  </div>
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<div class="line"><a name="l00043"></a><span class="lineno"><a class="line" href="structresumef_1_1counted__ptr.html#a8a5bff0a86d41b1ab50f817be770573a"> 43</a></span>  <a class="code" href="structresumef_1_1counted__ptr.html">counted_ptr</a>& <a class="code" href="structresumef_1_1counted__ptr.html#a8a5bff0a86d41b1ab50f817be770573a">operator=</a>(<span class="keyword">const</span> <a class="code" href="structresumef_1_1counted__ptr.html">counted_ptr</a>& cp)</div>
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<div class="line"><a name="l00044"></a><span class="lineno"> 44</span>  {</div>
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<div class="line"><a name="l00045"></a><span class="lineno"> 45</span>  <span class="keywordflow">if</span> (&cp != <span class="keyword">this</span>)</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>  <a class="code" href="structresumef_1_1counted__ptr.html">counted_ptr</a> t = cp;</div>
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<div class="line"><a name="l00048"></a><span class="lineno"> 48</span>  std::swap(_p, t._p);</div>
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<div class="line"><a name="l00049"></a><span class="lineno"> 49</span>  }</div>
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<div class="line"><a name="l00050"></a><span class="lineno"> 50</span>  <span class="keywordflow">return</span> *<span class="keyword">this</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>  </div>
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<div class="line"><a name="l00056"></a><span class="lineno"><a class="line" href="structresumef_1_1counted__ptr.html#af6a044ce1cdecc3a2650f16f445de2d4"> 56</a></span>  <a class="code" href="structresumef_1_1counted__ptr.html">counted_ptr</a>& <a class="code" href="structresumef_1_1counted__ptr.html#af6a044ce1cdecc3a2650f16f445de2d4">operator=</a>(<a class="code" href="structresumef_1_1counted__ptr.html">counted_ptr</a>&& cp) noexcept</div>
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<div class="line"><a name="l00057"></a><span class="lineno"> 57</span>  {</div>
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<div class="line"><a name="l00058"></a><span class="lineno"> 58</span>  <span class="keywordflow">if</span> (&cp != <span class="keyword">this</span>)</div>
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<div class="line"><a name="l00059"></a><span class="lineno"> 59</span>  std::swap(_p, cp._p);</div>
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<div class="line"><a name="l00060"></a><span class="lineno"> 60</span>  <span class="keywordflow">return</span> *<span class="keyword">this</span>;</div>
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<div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  }</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="l00066"></a><span class="lineno"><a class="line" href="structresumef_1_1counted__ptr.html#a825f25bf4975e015f859e8ba29bd85b6"> 66</a></span>  <a class="code" href="structresumef_1_1counted__ptr.html#a825f25bf4975e015f859e8ba29bd85b6">~counted_ptr</a>()</div>
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<div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  {</div>
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<div class="line"><a name="l00068"></a><span class="lineno"> 68</span>  _unlock();</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>  </div>
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<div class="line"><a name="l00074"></a><span class="lineno"><a class="line" href="structresumef_1_1counted__ptr.html#aa22f547da8b8e79b476ee83e4a790dba"> 74</a></span>  T* <a class="code" href="structresumef_1_1counted__ptr.html#aa22f547da8b8e79b476ee83e4a790dba">operator-></a>() const noexcept</div>
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<div class="line"><a name="l00075"></a><span class="lineno"> 75</span>  {</div>
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<div class="line"><a name="l00076"></a><span class="lineno"> 76</span>  <span class="keywordflow">return</span> _p;</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="l00082"></a><span class="lineno"><a class="line" href="structresumef_1_1counted__ptr.html#a9f6757dac685431f2ae561a58c502d1f"> 82</a></span>  T* <a class="code" href="structresumef_1_1counted__ptr.html#a9f6757dac685431f2ae561a58c502d1f">get</a>() const noexcept</div>
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<div class="line"><a name="l00083"></a><span class="lineno"> 83</span>  {</div>
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<div class="line"><a name="l00084"></a><span class="lineno"> 84</span>  <span class="keywordflow">return</span> _p;</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="l00090"></a><span class="lineno"><a class="line" href="structresumef_1_1counted__ptr.html#aa33f9e7d3ee850bed6dbefd40252a899"> 90</a></span>  <span class="keywordtype">void</span> <a class="code" href="structresumef_1_1counted__ptr.html#aa33f9e7d3ee850bed6dbefd40252a899">reset</a>()</div>
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<div class="line"><a name="l00091"></a><span class="lineno"> 91</span>  {</div>
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<div class="line"><a name="l00092"></a><span class="lineno"> 92</span>  _unlock();</div>
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<div class="line"><a name="l00093"></a><span class="lineno"> 93</span>  }</div>
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<div class="line"><a name="l00094"></a><span class="lineno"> 94</span>  <span class="keyword">private</span>:</div>
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<div class="line"><a name="l00095"></a><span class="lineno"> 95</span>  <span class="keywordtype">void</span> _unlock()</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="keywordflow">if</span> (_p != <span class="keyword">nullptr</span>)</div>
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<div class="line"><a name="l00098"></a><span class="lineno"> 98</span>  {</div>
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<div class="line"><a name="l00099"></a><span class="lineno"> 99</span>  <span class="keyword">auto</span> t = _p;</div>
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<div class="line"><a name="l00100"></a><span class="lineno"> 100</span>  _p = <span class="keyword">nullptr</span>;</div>
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<div class="line"><a name="l00101"></a><span class="lineno"> 101</span>  t->unlock();</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>  }</div>
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<div class="line"><a name="l00104"></a><span class="lineno"> 104</span>  <span class="keywordtype">void</span> _lock(T* p)</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>  <span class="keywordflow">if</span> (p != <span class="keyword">nullptr</span>)</div>
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<div class="line"><a name="l00107"></a><span class="lineno"> 107</span>  p->lock();</div>
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<div class="line"><a name="l00108"></a><span class="lineno"> 108</span>  _p = p;</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>  <span class="keywordtype">void</span> _lock()</div>
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<div class="line"><a name="l00111"></a><span class="lineno"> 111</span>  {</div>
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<div class="line"><a name="l00112"></a><span class="lineno"> 112</span>  <span class="keywordflow">if</span> (_p != <span class="keyword">nullptr</span>)</div>
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<div class="line"><a name="l00113"></a><span class="lineno"> 113</span>  _p->lock();</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>  T* _p = <span class="keyword">nullptr</span>;</div>
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<div class="line"><a name="l00116"></a><span class="lineno"> 116</span>  };</div>
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<div class="line"><a name="l00117"></a><span class="lineno"> 117</span>  </div>
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<div class="line"><a name="l00118"></a><span class="lineno"> 118</span>  <span class="keyword">template</span> <<span class="keyword">typename</span> T, <span class="keyword">typename</span> U></div>
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<div class="line"><a name="l00119"></a><span class="lineno"> 119</span>  <span class="keyword">inline</span> <span class="keywordtype">bool</span> operator == (<span class="keyword">const</span> counted_ptr<T>& _Left, <span class="keyword">const</span> counted_ptr<U>& _Right)</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>  <span class="keywordflow">return</span> _Left.get() == _Right.get();</div>
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<div class="line"><a name="l00122"></a><span class="lineno"> 122</span>  }</div>
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<div class="line"><a name="l00123"></a><span class="lineno"> 123</span>  <span class="keyword">template</span> <<span class="keyword">typename</span> T></div>
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<div class="line"><a name="l00124"></a><span class="lineno"> 124</span>  <span class="keyword">inline</span> <span class="keywordtype">bool</span> operator == (<span class="keyword">const</span> counted_ptr<T>& _Left, std::nullptr_t)</div>
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<div class="line"><a name="l00125"></a><span class="lineno"> 125</span>  {</div>
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<div class="line"><a name="l00126"></a><span class="lineno"> 126</span>  <span class="keywordflow">return</span> _Left.get() == <span class="keyword">nullptr</span>;</div>
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<div class="line"><a name="l00127"></a><span class="lineno"> 127</span>  }</div>
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<div class="line"><a name="l00128"></a><span class="lineno"> 128</span>  <span class="keyword">template</span> <<span class="keyword">typename</span> T></div>
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<div class="line"><a name="l00129"></a><span class="lineno"> 129</span>  <span class="keyword">inline</span> <span class="keywordtype">bool</span> operator == (std::nullptr_t, <span class="keyword">const</span> counted_ptr<T>& _Left)</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>  <span class="keywordflow">return</span> _Left.get() == <span class="keyword">nullptr</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> T></div>
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<div class="line"><a name="l00134"></a><span class="lineno"> 134</span>  <span class="keyword">inline</span> <span class="keywordtype">bool</span> operator != (<span class="keyword">const</span> counted_ptr<T>& _Left, std::nullptr_t)</div>
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<div class="line"><a name="l00135"></a><span class="lineno"> 135</span>  {</div>
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<div class="line"><a name="l00136"></a><span class="lineno"> 136</span>  <span class="keywordflow">return</span> _Left.get() != <span class="keyword">nullptr</span>;</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>  <span class="keyword">template</span> <<span class="keyword">typename</span> T></div>
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<div class="line"><a name="l00139"></a><span class="lineno"> 139</span>  <span class="keyword">inline</span> <span class="keywordtype">bool</span> operator != (std::nullptr_t, <span class="keyword">const</span> counted_ptr<T>& _Left)</div>
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<div class="line"><a name="l00140"></a><span class="lineno"> 140</span>  {</div>
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<div class="line"><a name="l00141"></a><span class="lineno"> 141</span>  <span class="keywordflow">return</span> _Left.get() != <span class="keyword">nullptr</span>;</div>
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<div class="line"><a name="l00142"></a><span class="lineno"> 142</span>  }</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="l00144"></a><span class="lineno"> 144</span>  </div>
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<div class="ttc" id="astructresumef_1_1counted__ptr_html_ab752ffdd40c7ab1be06e7662488d8e24"><div class="ttname"><a href="structresumef_1_1counted__ptr.html#ab752ffdd40c7ab1be06e7662488d8e24">resumef::counted_ptr::counted_ptr</a></div><div class="ttdeci">counted_ptr(T *p)</div><div class="ttdoc">通过裸指针构造一个计数指针。</div><div class="ttdef"><b>Definition:</b> counted_ptr.h:27</div></div>
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<div class="ttc" id="astructresumef_1_1counted__ptr_html_af6a044ce1cdecc3a2650f16f445de2d4"><div class="ttname"><a href="structresumef_1_1counted__ptr.html#af6a044ce1cdecc3a2650f16f445de2d4">resumef::counted_ptr::operator=</a></div><div class="ttdeci">counted_ptr & operator=(counted_ptr &&cp) noexcept</div><div class="ttdoc">移动赋值函数。</div><div class="ttdef"><b>Definition:</b> counted_ptr.h:56</div></div>
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<div class="ttc" id="astructresumef_1_1counted__ptr_html_ad3969379af7311183c1c11d13f6da9f3"><div class="ttname"><a href="structresumef_1_1counted__ptr.html#ad3969379af7311183c1c11d13f6da9f3">resumef::counted_ptr::counted_ptr</a></div><div class="ttdeci">counted_ptr() noexcept=default</div><div class="ttdoc">构造一个无内容的计数指针。</div></div>
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<div class="ttc" id="astructresumef_1_1counted__ptr_html_a8b6f5332dd4754c22970f7e5406c6233"><div class="ttname"><a href="structresumef_1_1counted__ptr.html#a8b6f5332dd4754c22970f7e5406c6233">resumef::counted_ptr::counted_ptr</a></div><div class="ttdeci">counted_ptr(counted_ptr &&cp) noexcept</div><div class="ttdoc">移动构造函数。</div><div class="ttdef"><b>Definition:</b> counted_ptr.h:35</div></div>
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<div class="ttc" id="astructresumef_1_1counted__ptr_html_a9f6757dac685431f2ae561a58c502d1f"><div class="ttname"><a href="structresumef_1_1counted__ptr.html#a9f6757dac685431f2ae561a58c502d1f">resumef::counted_ptr::get</a></div><div class="ttdeci">T * get() const noexcept</div><div class="ttdoc">获得管理的state指针。</div><div class="ttdef"><b>Definition:</b> counted_ptr.h:82</div></div>
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<div class="ttc" id="astructresumef_1_1counted__ptr_html"><div class="ttname"><a href="structresumef_1_1counted__ptr.html">resumef::counted_ptr</a></div><div class="ttdoc">专用与state的智能计数指针，通过管理state内嵌的引用计数来管理state的生存期。</div><div class="ttdef"><b>Definition:</b> counted_ptr.h:9</div></div>
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<div class="ttc" id="astructresumef_1_1counted__ptr_html_aa33f9e7d3ee850bed6dbefd40252a899"><div class="ttname"><a href="structresumef_1_1counted__ptr.html#aa33f9e7d3ee850bed6dbefd40252a899">resumef::counted_ptr::reset</a></div><div class="ttdeci">void reset()</div><div class="ttdoc">重置为空指针。</div><div class="ttdef"><b>Definition:</b> counted_ptr.h:90</div></div>
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<div class="ttc" id="astructresumef_1_1counted__ptr_html_aa22f547da8b8e79b476ee83e4a790dba"><div class="ttname"><a href="structresumef_1_1counted__ptr.html#aa22f547da8b8e79b476ee83e4a790dba">resumef::counted_ptr::operator-></a></div><div class="ttdeci">T * operator->() const noexcept</div><div class="ttdoc">重载指针操作符。</div><div class="ttdef"><b>Definition:</b> counted_ptr.h:74</div></div>
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<div class="ttc" id="astructresumef_1_1counted__ptr_html_a8a5bff0a86d41b1ab50f817be770573a"><div class="ttname"><a href="structresumef_1_1counted__ptr.html#a8a5bff0a86d41b1ab50f817be770573a">resumef::counted_ptr::operator=</a></div><div class="ttdeci">counted_ptr & operator=(const counted_ptr &cp)</div><div class="ttdoc">拷贝赋值函数。</div><div class="ttdef"><b>Definition:</b> counted_ptr.h:43</div></div>
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<div class="ttc" id="astructresumef_1_1counted__ptr_html_a825f25bf4975e015f859e8ba29bd85b6"><div class="ttname"><a href="structresumef_1_1counted__ptr.html#a825f25bf4975e015f859e8ba29bd85b6">resumef::counted_ptr::~counted_ptr</a></div><div class="ttdeci">~counted_ptr()</div><div class="ttdoc">析构函数中自动做一个计数减一操作。计数减为0，则删除state对象。</div><div class="ttdef"><b>Definition:</b> counted_ptr.h:66</div></div>
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<div class="ttc" id="astructresumef_1_1counted__ptr_html_ad466495cf5a6056e326a923558676ccd"><div class="ttname"><a href="structresumef_1_1counted__ptr.html#ad466495cf5a6056e326a923558676ccd">resumef::counted_ptr::counted_ptr</a></div><div class="ttdeci">counted_ptr(const counted_ptr &cp)</div><div class="ttdoc">拷贝构造函数。</div><div class="ttdef"><b>Definition:</b> counted_ptr.h:19</div></div>
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