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<a name="boost.histogram.axis.traits.update"></a><div class="titlepage"></div>
<div xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv"><pre class="synopsis"><span class="comment">// In header: <<a class="link" href="../../../../histogram/reference.html#header.boost.histogram.axis.traits_hpp" title="Header <boost/histogram/axis/traits.hpp>">boost/histogram/axis/traits.hpp</a>>
</span>
-<span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> Axis<span class="special">,</span> <span class="keyword">typename</span> U<span class="special">,</span>
- <span class="keyword">typename</span> _V <span class="special">=</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">decay_t</span><span class="special"><</span><span class="identifier">detail</span><span class="special">::</span><span class="identifier">arg_type</span><span class="special"><</span><span class="keyword">decltype</span><span class="special">(</span><span class="special">&</span><span class="identifier">Axis</span><span class="special">::</span><span class="identifier">index</span><span class="special">)</span><span class="special">>></span> <span class="special">></span>
+<span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> Axis<span class="special">,</span> <span class="keyword">typename</span> U<span class="special">></span>
<span class="identifier">std</span><span class="special">::</span><span class="identifier">pair</span><span class="special"><</span> <span class="identifier">index_type</span><span class="special">,</span> <span class="identifier">index_type</span> <span class="special">></span> <span class="identifier">update</span><span class="special">(</span><span class="identifier">Axis</span> <span class="special">&</span> axis<span class="special">,</span> <span class="keyword">const</span> <span class="identifier">U</span> <span class="special">&</span> value<span class="special">)</span><span class="special">;</span></pre></div>
<div class="refsect1">
-<a name="idm45952479025408"></a><h2>Description</h2>
+<a name="idm45212145046544"></a><h2>Description</h2>
<p>Throws <code class="computeroutput">std::invalid_argument</code> if the value argument is not implicitly convertible to the argument expected by the <code class="computeroutput">index</code> method. If the result of boost::histogram::axis::traits::static_options<decltype(axis)> has the growth flag set, call <code class="computeroutput">update</code> method with the argument and return the result. Otherwise, call <code class="computeroutput">index</code> and return the pair of the result and a zero shift.</p>
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