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<div class="title">std::pair&lt; First, Second &gt; Struct Template Reference<div class="ingroups"><a class="el" href="group__group-ext.html">External adapters</a> &raquo; <a class="el" href="group__group-ext-std.html">Standard library adapters</a></div></div>  </div>
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<a name="details" id="details"></a><h2 class="groupheader">Description</h2>
<div class="textblock"><h3>template&lt;typename First, typename Second&gt;<br />
struct std::pair&lt; First, Second &gt;</h3>

<p>Adaptation of <code><a class="el" href="structstd_1_1pair.html" title="Adaptation of std::pair for Hana.">std::pair</a></code> for Hana. </p>
<h2>Modeled concepts </h2>
<p>A <code><a class="el" href="structstd_1_1pair.html" title="Adaptation of std::pair for Hana.">std::pair</a></code> models exactly the same concepts as a <code>hana::pair</code>. Please refer to the documentation of <code>hana::pair</code> for details.</p>
<div class="fragment"><div class="line"><span class="comment">// Copyright Louis Dionne 2013-2017</span></div><div class="line"><span class="comment">// Distributed under the Boost Software License, Version 1.0.</span></div><div class="line"><span class="comment">// (See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt)</span></div><div class="line"></div><div class="line"><span class="preprocessor">#include &lt;<a class="code" href="ext_2std_2pair_8hpp.html">boost/hana/ext/std/pair.hpp</a>&gt;</span></div><div class="line"><span class="preprocessor">#include &lt;<a class="code" href="first_8hpp.html">boost/hana/first.hpp</a>&gt;</span></div><div class="line"><span class="preprocessor">#include &lt;<a class="code" href="less_8hpp.html">boost/hana/less.hpp</a>&gt;</span></div><div class="line"><span class="preprocessor">#include &lt;<a class="code" href="not__equal_8hpp.html">boost/hana/not_equal.hpp</a>&gt;</span></div><div class="line"><span class="preprocessor">#include &lt;<a class="code" href="second_8hpp.html">boost/hana/second.hpp</a>&gt;</span></div><div class="line"><span class="keyword">namespace </span>hana = <a class="code" href="namespaceboost_1_1hana.html">boost::hana</a>;</div><div class="line"></div><div class="line"></div><div class="line">constexpr <span class="keyword">auto</span> pair = std::make_pair(1, <span class="charliteral">&#39;x&#39;</span>);</div><div class="line"></div><div class="line">static_assert(<a class="code" href="group__group-Product.html#ga34bbf4281de06dc3540441e8b2bd24f4">hana::first</a>(pair) == 1, <span class="stringliteral">&quot;&quot;</span>);</div><div class="line">static_assert(<a class="code" href="group__group-Product.html#ga7bb979d59ffc3ab862cb7d9dc7730077">hana::second</a>(pair) == <span class="charliteral">&#39;x&#39;</span>, <span class="stringliteral">&quot;&quot;</span>);</div><div class="line"></div><div class="line">static_assert(<a class="code" href="group__group-Comparable.html#gae33be2e0d5e04f19082f4b7740dfc9cd">hana::not_equal</a>(pair, std::make_pair(3, <span class="charliteral">&#39;z&#39;</span>)), <span class="stringliteral">&quot;&quot;</span>);</div><div class="line">static_assert(<a class="code" href="group__group-Orderable.html#gad510011602bdb14686f1c4ec145301c9">hana::less</a>(pair, std::make_pair(3, <span class="charliteral">&#39;x&#39;</span>)), <span class="stringliteral">&quot;&quot;</span>);</div><div class="line"></div><div class="line"><span class="keywordtype">int</span> main() { }</div></div><!-- fragment --> </div></div><!-- contents -->
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