<!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_TYPE_ERASURE_FREE</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="boost_typeerasure/reference.html#header.boost.type_erasure.free_hpp" title="Header <boost/type_erasure/free.hpp>"> <link rel="prev" href="boost/type_erasure/bad_function_call.html" title="Class bad_function_call"> <link rel="next" href="boost/type_erasure/is_empty.html" title="Function template is_empty"> </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" 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class="titlepage"></div> <div class="refnamediv"> <h2><span class="refentrytitle">Macro BOOST_TYPE_ERASURE_FREE</span></h2> <p>BOOST_TYPE_ERASURE_FREE — Defines a primitive concept for a free function. </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="boost_typeerasure/reference.html#header.boost.type_erasure.free_hpp" title="Header <boost/type_erasure/free.hpp>">boost/type_erasure/free.hpp</a>> </span>BOOST_TYPE_ERASURE_FREE(qualified_name, function_name, N)</pre></div> <div class="refsect1"> <a name="idm45555078840944"></a><h2>Description</h2> <p> The declaration of the concept is </p> <pre class="programlisting"><span class="keyword">template</span><span class="special"><</span><span class="keyword">class</span> <span class="identifier">Sig</span><span class="special">></span> <span class="keyword">struct</span> <span class="special">::</span><span class="identifier">namespace1</span><span class="special">::</span><span class="identifier">namespace2</span><span class="special">::</span><span class="special">...</span><span class="special">::</span><span class="identifier">concept_name</span><span class="special">;</span> </pre> <p> where Sig is a function type giving the signature of the function.</p> <p>This macro can only be used in the global namespace.</p> <p>Example:</p> <pre class="programlisting"><span class="identifier">BOOST_TYPE_ERASURE_FREE</span><span class="special">(</span><span class="special">(</span><span class="identifier">boost</span><span class="special">)</span><span class="special">(</span><span class="identifier">has_to_string</span><span class="special">)</span><span class="special">,</span> <span class="identifier">to_string</span><span class="special">,</span> <span class="number">1</span><span class="special">)</span> </pre> <p> </p> <div class="variablelist"><table border="0" class="variablelist compact"> <colgroup> <col align="left" valign="top"> <col> </colgroup> <tbody><tr> <td><p><span class="term">Parameters:</span></p></td> <td><div class="variablelist"><table border="0" class="variablelist compact"> <colgroup> <col align="left" valign="top"> <col> </colgroup> <tbody> <tr> <td><p><span class="term"><code class="computeroutput">N</code></span></p></td> <td><p>is the number of arguments of the function.</p></td> </tr> <tr> <td><p><span class="term"><code class="computeroutput">function_name</code></span></p></td> <td><p>is the name of the function. </p></td> </tr> <tr> <td><p><span class="term"><code class="computeroutput">qualified_name</code></span></p></td> <td><p>should be a preprocessor sequence of the form (namespace1)(namespace2)...(concept_name). </p></td> </tr> </tbody> </table></div></td> </tr></tbody> </table></div> </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 © 2011-2013 Steven Watanabe<p> Distributed under the Boost Software License, Version 1.0. (See accompanying 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>) </p> </div></td> </tr></table> <hr> <div class="spirit-nav"> <a accesskey="p" href="boost/type_erasure/bad_function_call.html"><img src="../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="boost_typeerasure/reference.html#header.boost.type_erasure.free_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/type_erasure/is_empty.html"><img src="../../doc/src/images/next.png" alt="Next"></a> </div> </body> </html>