1<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> 2<html> 3<head> 4<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> 5<title>Function template else_</title> 6<link rel="stylesheet" href="../../../../doc/src/boostbook.css" type="text/css"> 7<meta name="generator" content="DocBook XSL Stylesheets V1.79.1"> 8<link rel="home" href="../../index.html" title="The Boost C++ Libraries BoostBook Documentation Subset"> 9<link rel="up" href="../../yap/reference.html#header.boost.yap.algorithm_hpp" title="Header <boost/yap/algorithm.hpp>"> 10<link rel="prev" href="then.html" title="Function template then"> 11<link rel="next" href="callable.html" title="Function template callable"> 12</head> 13<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"> 14<table cellpadding="2" width="100%"><tr> 15<td valign="top"><img alt="Boost C++ Libraries" width="277" height="86" src="../../../../boost.png"></td> 16<td align="center"><a href="../../../../index.html">Home</a></td> 17<td align="center"><a href="../../../../libs/libraries.htm">Libraries</a></td> 18<td align="center"><a href="http://www.boost.org/users/people.html">People</a></td> 19<td align="center"><a href="http://www.boost.org/users/faq.html">FAQ</a></td> 20<td align="center"><a href="../../../../more/index.htm">More</a></td> 21</tr></table> 22<hr> 23<div class="spirit-nav"> 24<a accesskey="p" href="then.html"><img src="../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../../yap/reference.html#header.boost.yap.algorithm_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="callable.html"><img src="../../../../doc/src/images/next.png" alt="Next"></a> 25</div> 26<div class="refentry"> 27<a name="boost.yap.else_"></a><div class="titlepage"></div> 28<div class="refnamediv"> 29<h2><span class="refentrytitle">Function template else_</span></h2> 30<p>boost::yap::else_</p> 31</div> 32<h2 xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv-title">Synopsis</h2> 33<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="../../yap/reference.html#header.boost.yap.algorithm_hpp" title="Header <boost/yap/algorithm.hpp>">boost/yap/algorithm.hpp</a>> 34 35</span> 36<span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> <a class="link" href="../../Expr.html" title="Concept Expr">Expr</a><span class="special">></span> <span class="keyword">decltype</span><span class="special">(</span><span class="keyword">auto</span><span class="special">)</span> <span class="keyword">constexpr</span> <span class="identifier">else_</span><span class="special">(</span><span class="identifier">Expr</span> <span class="special">&&</span> expr<span class="special">)</span><span class="special">;</span></pre></div> 37<div class="refsect1"> 38<a name="id-1.3.48.8.2.2.12.4"></a><h2>Description</h2> 39<p>Returns the else-expression in an if_else expression.</p> 40<p>Equivalent to <code class="computeroutput">get(expr, 2_c)</code>.</p> 41<div class="note"><table border="0" summary="Note"> 42<tr> 43<td rowspan="2" align="center" valign="top" width="25"><img alt="[Note]" src="../../../../doc/src/images/note.png"></td> 44<th align="left">Note</th> 45</tr> 46<tr><td align="left" valign="top"><p><code class="computeroutput">else_()</code> is only valid if <span class="emphasis"><em>Expr</em></span> is an <code class="computeroutput">expr_kind::if_else</code> expression. </p></td></tr> 47</table></div> 48<p> 49</p> 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 © 2018 T. Zachary Laine<p> 55 Distributed under the Boost Software License, Version 1.0. (See accompanying 56 file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>) 57 </p> 58</div></td> 59</tr></table> 60<hr> 61<div class="spirit-nav"> 62<a accesskey="p" href="then.html"><img src="../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../../yap/reference.html#header.boost.yap.algorithm_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="callable.html"><img src="../../../../doc/src/images/next.png" alt="Next"></a> 63</div> 64</body> 65</html> 66
