1<html> 2<head> 3<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> 4<title>Struct template value_type</title> 5<link rel="stylesheet" href="../../../../../../../../doc/src/boostbook.css" type="text/css"> 6<meta name="generator" content="DocBook XSL Stylesheets V1.79.1"> 7<link rel="home" href="../../../../index.html" title="Chapter 1. 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This is a meta-function (template alias), it accepts an axis type and returns the value type.</p> 40<p>The value type is deduced from the argument of the <code class="computeroutput">Axis::index</code> method. Const references are decayed to the their value types, for example, the type deduced for<code class="computeroutput">Axis::index(const int&)</code> is<code class="computeroutput">int</code>.</p> 41<p>The deduction always succeeds if the axis type models the Axis concept correctly. Errors come from violations of the concept, in particular, an index method that is templated or overloaded is not allowed.</p> 42<p> 43</p> 44<div class="refsect2"> 45<a name="idm45113191801408"></a><h3>Template Parameters</h3> 46<div class="orderedlist"><ol class="orderedlist" type="1"><li class="listitem"> 47<pre class="literallayout"><span class="keyword">typename</span> Axis</pre> 48<p>axis type. </p> 49</li></ol></div> 50</div> 51</div> 52</div> 53<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> 54<td align="left"></td> 55<td align="right"><div class="copyright-footer">Copyright © 2016-2019 Hans 56 Dembinski<p> 57 Distributed under the Boost Software License, Version 1.0. (See accompanying 58 file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) 59 </p> 60</div></td> 61</tr></table> 62<hr> 63<div class="spirit-nav"> 64<a accesskey="p" href="value_as.html"><img src="../../../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../../../../histogram/reference.html#header.boost.histogram.axis.traits_hpp"><img src="../../../../../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../../../index.html"><img src="../../../../../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="width.html"><img src="../../../../../../../../doc/src/images/next.png" alt="Next"></a> 65</div> 66</body> 67</html> 68
