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 operator||</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="../../tribool/reference.html#header.boost.logic.tribool_hpp" title="Header <boost/logic/tribool.hpp>"> 10<link rel="prev" href="operator__.html" title="Function operator&&"> 11<link rel="next" href="operator__.html" title="Function operator=="> 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 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class="titlepage"></div> 28<div class="refnamediv"> 29<h2><span class="refentrytitle">Function operator||</span></h2> 30<p>boost::logic::operator|| — Computes the logical disjunction of two tribools. </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="../../tribool/reference.html#header.boost.logic.tribool_hpp" title="Header <boost/logic/tribool.hpp>">boost/logic/tribool.hpp</a>> 34 35</span> 36<span class="identifier">BOOST_CONSTEXPR</span> <a class="link" href="tribool.html" title="Class tribool">tribool</a> <span class="keyword">operator</span><span class="special">||</span><span class="special">(</span><a class="link" href="tribool.html" title="Class tribool">tribool</a> x<span class="special">,</span> <a class="link" href="tribool.html" title="Class tribool">tribool</a> y<span class="special">)</span><span class="special">;</span> 37<span class="identifier">BOOST_CONSTEXPR</span> <a class="link" href="tribool.html" title="Class tribool">tribool</a> <span class="keyword">operator</span><span class="special">||</span><span class="special">(</span><a class="link" href="tribool.html" title="Class tribool">tribool</a> x<span class="special">,</span> <span class="keyword">bool</span> y<span class="special">)</span><span class="special">;</span> 38<span class="identifier">BOOST_CONSTEXPR</span> <a class="link" href="tribool.html" title="Class tribool">tribool</a> <span class="keyword">operator</span><span class="special">||</span><span class="special">(</span><span class="keyword">bool</span> x<span class="special">,</span> <a class="link" href="tribool.html" title="Class tribool">tribool</a> y<span class="special">)</span><span class="special">;</span> 39<span class="identifier">BOOST_CONSTEXPR</span> <a class="link" href="tribool.html" title="Class tribool">tribool</a> <span class="keyword">operator</span><span class="special">||</span><span class="special">(</span><span class="identifier">indeterminate_keyword_t</span><span class="special">,</span> <a class="link" href="tribool.html" title="Class tribool">tribool</a> x<span class="special">)</span><span class="special">;</span> 40<span class="identifier">BOOST_CONSTEXPR</span> <a class="link" href="tribool.html" title="Class tribool">tribool</a> <span class="keyword">operator</span><span class="special">||</span><span class="special">(</span><a class="link" href="tribool.html" title="Class tribool">tribool</a> x<span class="special">,</span> <span class="identifier">indeterminate_keyword_t</span><span class="special">)</span><span class="special">;</span></pre></div> 41<div class="refsect1"> 42<a name="id-1.3.24.5.2.8.4"></a><h2>Description</h2> 43<p> 44 45</p> 46<div class="variablelist"><table border="0" class="variablelist compact"> 47<colgroup> 48<col align="left" valign="top"> 49<col> 50</colgroup> 51<tbody> 52<tr> 53<td><p><span class="term">Returns:</span></p></td> 54<td> 55<p>the result of logically ORing the two tribool values, according to the following table: </p> 56<div class="informaltable"><table class="table"> 57<colgroup> 58<col> 59<col> 60<col> 61<col> 62</colgroup> 63<tbody> 64<tr> 65<td align="center" valign="middle"><span class="bold"><strong><code class="computeroutput">||</code></strong></span></td> 66<td align="center" valign="middle"><span class="bold"><strong>false</strong></span></td> 67<td align="center" valign="middle"><span class="bold"><strong>true</strong></span></td> 68<td align="center" valign="middle"><span class="bold"><strong>indeterminate</strong></span></td> 69</tr> 70<tr> 71<td align="center" valign="middle"><span class="bold"><strong>false</strong></span></td> 72<td align="center" valign="middle">false</td> 73<td align="center" valign="middle">true</td> 74<td align="center" valign="middle">indeterminate</td> 75</tr> 76<tr> 77<td align="center" valign="middle"><span class="bold"><strong>true</strong></span></td> 78<td align="center" valign="middle">true</td> 79<td align="center" valign="middle">true</td> 80<td align="center" valign="middle">true</td> 81</tr> 82<tr> 83<td align="center" valign="middle"><span class="bold"><strong>indeterminate</strong></span></td> 84<td align="center" valign="middle">indeterminate</td> 85<td align="center" valign="middle">true</td> 86<td align="center" valign="middle">indeterminate</td> 87</tr> 88</tbody> 89</table></div> 90<p> 91</p> 92</td> 93</tr> 94<tr> 95<td><p><span class="term">Throws:</span></p></td> 96<td>Will not throw.</td> 97</tr> 98</tbody> 99</table></div> 100</div> 101</div> 102<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> 103<td align="left"></td> 104<td align="right"><div class="copyright-footer">Copyright © 2002-2004 Douglas Gregor<p>Use, modification and distribution is subject to the Boost 105 Software License, Version 1.0. (See accompanying file 106 <code class="filename">LICENSE_1_0.txt</code> or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)</p> 107</div></td> 108</tr></table> 109<hr> 110<div class="spirit-nav"> 111<a accesskey="p" href="operator__.html"><img src="../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../../tribool/reference.html#header.boost.logic.tribool_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="operator__.html"><img src="../../../../doc/src/images/next.png" alt="Next"></a> 112</div> 113</body> 114</html> 115
