<html> <head> <meta http-equiv="Content-Type" content="text/html; charset=US-ASCII"> <title>MPL Interoperability</title> <link rel="stylesheet" href="../../../../../doc/src/boostbook.css" type="text/css"> <meta name="generator" content="DocBook XSL Stylesheets V1.74.0"> <link rel="home" href="../index.html" title="Chapter 1. Boost.TypeTraits"> <link rel="up" href="../index.html" title="Chapter 1. Boost.TypeTraits"> <link rel="prev" href="intrinsics.html" title="Support for Compiler Intrinsics"> <link rel="next" href="examples.html" title="Examples"> </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="intrinsics.html"><img src="../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../index.html"><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="examples.html"><img src="../../../../../doc/src/images/next.png" alt="Next"></a> </div> <div class="section" lang="en"> <div class="titlepage"><div><div><h2 class="title" style="clear: both"> <a name="boost_typetraits.mpl"></a><a class="link" href="mpl.html" title="MPL Interoperability"> MPL Interoperability</a> </h2></div></div></div> <p> All the value based traits in this library conform to MPL's requirements for an <a href="../../../../../libs/mpl/doc/refmanual/integral-constant.html" target="_top">Integral Constant type</a>: that includes a number of rather intrusive workarounds for broken compilers. </p> <p> Purely as an implementation detail, this means that <code class="computeroutput"><a class="link" href="reference/integral_constant.html" title="integral_constant">true_type</a></code> inherits from <a href="../../../../../libs/mpl/doc/refmanual/bool.html" target="_top"><code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">mpl</span><span class="special">::</span><span class="identifier">true_</span></code></a>, <code class="computeroutput"><a class="link" href="reference/integral_constant.html" title="integral_constant">false_type</a></code> inherits from <a href="../../../../../libs/mpl/doc/refmanual/bool.html" target="_top"><code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">mpl</span><span class="special">::</span><span class="identifier">false_</span></code></a>, and <code class="computeroutput"><a class="link" href="reference/integral_constant.html" title="integral_constant">integral_constant</a><span class="special"><</span><span class="identifier">T</span><span class="special">,</span> <span class="identifier">v</span><span class="special">></span></code> inherits from <a href="../../../../../libs/mpl/doc/refmanual/integral-c.html" target="_top"><code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">mpl</span><span class="special">::</span><span class="identifier">integral_c</span><span class="special"><</span><span class="identifier">T</span><span class="special">,</span><span class="identifier">v</span><span class="special">></span></code></a> (provided <code class="computeroutput"><span class="identifier">T</span></code> is not <code class="computeroutput"><span class="keyword">bool</span></code>) </p> </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 © 2000, 2006 Adobe Systems Inc, David Abrahams, Steve Cleary, Beman Dawes, Aleksey Gurtovoy, Howard Hinnant, Jesse Jones, Mat Marcus, Itay Maman, John Maddock, Alexander Nasonov, Thorsten Ottosen, Robert Ramey and Jeremy Siek<p> Distributed under the Boost Software License, Version 1.0. 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