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          <td class="memname">constexpr auto boost::hana::hash</td>
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<p><code>#include &lt;<a class="el" href="fwd_2hash_8hpp.html">boost/hana/fwd/hash.hpp</a>&gt;</code></p>
<b>Initial value:</b><div class="fragment"><div class="line">= [](<span class="keyword">auto</span> <span class="keyword">const</span>&amp; x) {</div><div class="line">        <span class="keywordflow">return</span> tag-dispatched;</div><div class="line">    }<