1<html> 2<head> 3<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> 4<title>Struct template is_reducible</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. Boost.Histogram"> 8<link rel="up" href="../../../../histogram/reference.html#header.boost.histogram.axis.traits_hpp" title="Header <boost/histogram/axis/traits.hpp>"> 9<link rel="prev" href="is_ordered.html" title="Struct template is_ordered"> 10<link rel="next" href="metadata.html" title="Function template metadata"> 11</head> 12<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"> 13<table cellpadding="2" width="100%"><tr> 14<td valign="top"><img alt="Boost C++ Libraries" width="277" height="86" src="../../../../../../../../boost.png"></td> 15<td align="center"><a href="../../../../../../../../index.html">Home</a></td> 16<td align="center"><a href="../../../../../../../libraries.htm">Libraries</a></td> 17<td align="center"><a href="http://www.boost.org/users/people.html">People</a></td> 18<td align="center"><a href="http://www.boost.org/users/faq.html">FAQ</a></td> 19<td align="center"><a href="../../../../../../../../more/index.htm">More</a></td> 20</tr></table> 21<hr> 22<div class="spirit-nav"> 23<a accesskey="p" href="is_ordered.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="metadata.html"><img src="../../../../../../../../doc/src/images/next.png" alt="Next"></a> 24</div> 25<div class="refentry"> 26<a name="boost.histogram.axis.traits.is_reducible"></a><div class="titlepage"></div> 27<div class="refnamediv"> 28<h2><span class="refentrytitle">Struct template is_reducible</span></h2> 29<p>boost::histogram::axis::traits::is_reducible — Meta-function to detect whether an axis is reducible. </p> 30</div> 31<h2 xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv-title">Synopsis</h2> 32<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>> 33 34</span><span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> Axis<span class="special">></span> 35<span class="keyword">struct</span> <a class="link" href="is_reducible.html" title="Struct template is_reducible">is_reducible</a> <span class="special">{</span> 36<span class="special">}</span><span class="special">;</span></pre></div> 37<div class="refsect1"> 38<a name="idm45113191963264"></a><h2>Description</h2> 39<p>Doxygen does not render this well. This is a meta-function (template alias), it accepts an axis type and represents compile-time boolean which is true or false, depending on whether the axis can be reduced with boost::histogram::algorithm::reduce().</p> 40<p>An axis can be made reducible by adding a special constructor, see Axis concept for details.</p> 41<p> 42</p> 43<div class="refsect2"> 44<a name="idm45113191961696"></a><h3>Template Parameters</h3> 45<div class="orderedlist"><ol class="orderedlist" type="1"><li class="listitem"> 46<pre class="literallayout"><span class="keyword">typename</span> Axis</pre> 47<p>axis type. </p> 48</li></ol></div> 49</div> 50</div> 51</div> 52<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> 53<td align="left"></td> 54<td align="right"><div class="copyright-footer">Copyright © 2016-2019 Hans 55 Dembinski<p> 56 Distributed under the Boost Software License, Version 1.0. (See accompanying 57 file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) 58 </p> 59</div></td> 60</tr></table> 61<hr> 62<div class="spirit-nav"> 63<a accesskey="p" href="is_ordered.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="metadata.html"><img src="../../../../../../../../doc/src/images/next.png" alt="Next"></a> 64</div> 65</body> 66</html> 67
