<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=US-ASCII"> <title>Macro BOOST_TRIBOOL_THIRD_STATE</title> <link rel="stylesheet" href="../../doc/src/boostbook.css" type="text/css"> <meta name="generator" content="DocBook XSL Stylesheets V1.78.1"> <link rel="home" href="index.html" title="The Boost C++ Libraries BoostBook Documentation Subset"> <link rel="up" href="tribool/reference.html#header.boost.logic.tribool_hpp" title="Header <boost/logic/tribool.hpp>"> <link rel="prev" href="boost/logic/operator_idm45507093800208.html" title="Function operator!="> <link rel="next" href="boost/logic/indeterminate_name.html" title="Class template indeterminate_name"> </head> <body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"> <table cellpadding="2" width="100%"><tr> <td valign="top"><img alt="Boost C++ Libraries" width="277" height="86" src="../../boost.png"></td> <td align="center"><a href="../../index.html">Home</a></td> <td align="center"><a href="../../libs/libraries.htm">Libraries</a></td> <td align="center"><a href="http://www.boost.org/users/people.html">People</a></td> <td align="center"><a href="http://www.boost.org/users/faq.html">FAQ</a></td> <td align="center"><a href="../../more/index.htm">More</a></td> </tr></table> <hr> <div class="spirit-nav"> <a accesskey="p" href="boost/logic/operator_idm45507093800208.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="boost/logic/indeterminate_name.html"><img src="../../doc/src/images/next.png" alt="Next"></a> </div> <div class="refentry"> <a name="BOOST_TRIBOOL_THIRD_STATE"></a><div class="titlepage"></div> <div class="refnamediv"> <h2><span class="refentrytitle">Macro BOOST_TRIBOOL_THIRD_STATE</span></h2> <p>BOOST_TRIBOOL_THIRD_STATE — Declare a new name for the third state of a tribool. </p> </div> <h2 xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv-title">Synopsis</h2> <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>> </span>BOOST_TRIBOOL_THIRD_STATE(Name)</pre></div> <div class="refsect1"> <a name="idm45555085201776"></a><h2>Description</h2> <p>Use this macro to declare a new name for the third state of a tribool. This state can have any number of new names (in addition to <code class="computeroutput">indeterminate</code>), all of which will be equivalent. The new name will be placed in the namespace in which the macro is expanded.</p> <p>Example: BOOST_TRIBOOL_THIRD_STATE(true_or_false)</p> <p>tribool x(true_or_false); // potentially set x if (true_or_false(x)) { // don't know what x is } </p> </div> </div> <table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> <td align="left"></td> <td align="right"><div class="copyright-footer">Copyright © 2002-2004 Douglas Gregor<p>Use, modification and distribution is subject to the Boost Software License, Version 1.0. (See accompanying file <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> </div></td> </tr></table> <hr> <div class="spirit-nav"> <a accesskey="p" href="boost/logic/operator_idm45507093800208.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="boost/logic/indeterminate_name.html"><img src="../../doc/src/images/next.png" alt="Next"></a> </div> </body> </html>