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<div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="preprocessor">#ifndef HASH_PAIR_H</span></div>
<div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="preprocessor">#define HASH_PAIR_H</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> <span class="keyword">template</span> <<span class="keyword">class</span> T></div>
<div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="keyword">inline</span> <span class="keywordtype">void</span> hash_combine(std::size_t & seed, <span class="keyword">const</span> T & v)</div>
<div class="line"><a name="l00006"></a><span class="lineno"> 6</span> {</div>
<div class="line"><a name="l00007"></a><span class="lineno"> 7</span>  std::hash<T> hasher;</div>
<div class="line"><a name="l00008"></a><span class="lineno"> 8</span>  seed ^= hasher(v) + 0x9e3779b9 + (seed << 6) + (seed >> 2);</div>
<div class="line"><a name="l00009"></a><span class="lineno"> 9</span> }</div>
<div class="line"><a name="l00010"></a><span class="lineno"> 10</span> </div>
<div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="keyword">namespace </span><a class="code" href="namespacestd.html">std</a></div>
<div class="line"><a name="l00012"></a><span class="lineno"> 12</span> {</div>
<div class="line"><a name="l00013"></a><span class="lineno"><a class="line" href="structstd_1_1hash_3_01pair_3_01S_00_01T_01_4_01_4.html"> 13</a></span>  <span class="keyword">template</span><<span class="keyword">typename</span> S, <span class="keyword">typename</span> T> <span class="keyword">struct </span>hash<pair<S, T>></div>
<div class="line"><a name="l00014"></a><span class="lineno"> 14</span>  {</div>
<div class="line"><a name="l00015"></a><span class="lineno"> 15</span>  <span class="keyword">inline</span> <span class="keywordtype">size_t</span> operator()(<span class="keyword">const</span> pair<S, T> & v)<span class="keyword"> const</span></div>
<div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="keyword"> </span>{</div>
<div class="line"><a name="l00017"></a><span class="lineno"> 17</span>  <span class="keywordtype">size_t</span> seed = 0;</div>
<div class="line"><a name="l00018"></a><span class="lineno"> 18</span>  ::hash_combine(seed, v.first);</div>
<div class="line"><a name="l00019"></a><span class="lineno"> 19</span>  ::hash_combine(seed, v.second);</div>
<div class="line"><a name="l00020"></a><span class="lineno"> 20</span>  <span class="keywordflow">return</span> seed;</div>
<div class="line"><a name="l00021"></a><span class="lineno"> 21</span>  }</div>
<div class="line"><a name="l00022"></a><span class="lineno"> 22</span>  };</div>
<div class="line"><a name="l00023"></a><span class="lineno"> 23</span> }</div>
<div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="preprocessor">#endif</span></div>
<div class="ttc" id="namespacestd_html"><div class="ttname"><a href="namespacestd.html">std</a></div><div class="ttdef"><b>Definition:</b> hash_pair.h:11</div></div>
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