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<a name="boost.histogram.operator+"></a><div class="titlepage"></div>
<span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> A1<span class="special">,</span> <span class="keyword">typename</span> S1<span class="special">,</span> <span class="keyword">typename</span> A2<span class="special">,</span> <span class="keyword">typename</span> S2<span class="special">></span>
<span class="keyword">auto</span> <span class="keyword">operator</span><span class="special">+</span><span class="special">(</span><span class="keyword">const</span> <a class="link" href="histogram.html" title="Class template histogram">histogram</a><span class="special"><</span> <span class="identifier">A1</span><span class="special">,</span> <span class="identifier">S1</span> <span class="special">></span> <span class="special">&</span> a<span class="special">,</span> <span class="keyword">const</span> <a class="link" href="histogram.html" title="Class template histogram">histogram</a><span class="special"><</span> <span class="identifier">A2</span><span class="special">,</span> <span class="identifier">S2</span> <span class="special">></span> <span class="special">&</span> b<span class="special">)</span><span class="special">;</span></pre></div>
<div class="refsect1">
-<a name="idm45952483250160"></a><h2>Description</h2>
+<a name="idm45212149491184"></a><h2>Description</h2>
<p>The returned histogram type is the most efficient and safest one constructible from the inputs, if they are not the same type. If one histogram has a tuple axis, the result has a tuple axis. The chosen storage is the one with the larger dynamic range. </p>
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