<html> <head> <meta http-equiv="Content-Type" content="text/html; charset=US-ASCII"> <title>const Ranges</title> <link rel="stylesheet" href="../../../../../../doc/src/boostbook.css" type="text/css"> <meta name="generator" content="DocBook XSL Stylesheets V1.75.2"> <link rel="home" href="../../index.html" title="Chapter 1. Range 2.0"> <link rel="up" href="../mfc_atl.html" title="MFC/ATL (courtesy of Shunsuke Sogame)"> <link rel="prev" href="atl_ranges.html" title="ATL Ranges"> <link rel="next" href="references.html" title="References"> </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="atl_ranges.html"><img src="../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../mfc_atl.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="references.html"><img src="../../../../../../doc/src/images/next.png" alt="Next"></a> </div> <div class="section"> <div class="titlepage"><div><div><h3 class="title"> <a name="range.mfc_atl.const_ranges"></a><a class="link" href="const_ranges.html" title="const Ranges"> const Ranges</a> </h3></div></div></div> <p> <code class="computeroutput"><span class="identifier">range_reference</span><span class="special"><</span><span class="keyword">const</span> <span class="identifier">Range</span><span class="special">>::</span><span class="identifier">type</span></code> is defined by the following algorithm. Let <code class="computeroutput"><span class="identifier">Range</span></code> be any type listed above and <code class="computeroutput"><span class="identifier">Ref</span></code> be the same as <code class="computeroutput"><span class="identifier">range_reference</span><span class="special"><</span><span class="identifier">Range</span><span class="special">>::</span><span class="identifier">type</span></code>. </p> <p> </p> <pre class="programlisting"><span class="keyword">if</span> <span class="special">(</span><span class="identifier">Range</span> <span class="identifier">is</span> <span class="identifier">CObArray</span> <span class="special">||</span> <span class="identifier">Range</span> <span class="identifier">is</span> <span class="identifier">CObList</span><span class="special">)</span> <span class="keyword">return</span> <span class="identifier">CObject</span> <span class="keyword">const</span> <span class="special">*</span> <span class="special">&</span> <span class="keyword">else</span> <span class="keyword">if</span> <span class="special">(</span><span class="identifier">Range</span> <span class="identifier">is</span> <span class="identifier">CPtrArray</span> <span class="special">||</span> <span class="identifier">Range</span> <span class="identifier">is</span> <span class="identifier">CPtrList</span><span class="special">)</span> <span class="keyword">return</span> <span class="keyword">void</span> <span class="keyword">const</span> <span class="special">*</span> <span class="special">&</span> <span class="keyword">else</span> <span class="keyword">if</span> <span class="special">(</span><span class="identifier">there</span> <span class="identifier">is</span> <span class="identifier">a</span> <span class="identifier">type</span> <span class="identifier">X</span> <span class="identifier">such</span> <span class="identifier">that</span> <span class="identifier">X</span><span class="special">&</span> <span class="identifier">is</span> <span class="identifier">the</span> <span class="identifier">same</span> <span class="identifier">as</span> <span class="identifier">Ref</span><span class="special">)</span> <span class="keyword">return</span> <span class="identifier">X</span> <span class="keyword">const</span> <span class="special">&</span> <span class="keyword">else</span> <span class="keyword">if</span> <span class="special">(</span><span class="identifier">there</span> <span class="identifier">is</span> <span class="identifier">a</span> <span class="identifier">type</span> <span class="identifier">X</span> <span class="identifier">such</span> <span class="identifier">that</span> <span class="identifier">X</span><span class="special">*</span> <span class="keyword">const</span> <span class="identifier">is</span> <span class="identifier">the</span> <span class="identifier">same</span> <span class="identifier">as</span> <span class="identifier">Ref</span><span class="special">)</span> <span class="keyword">return</span> <span class="identifier">X</span> <span class="keyword">const</span> <span class="special">*</span> <span class="keyword">const</span> <span class="keyword">else</span> <span class="keyword">return</span> <span class="identifier">Ref</span> </pre> <p> </p> <p> Other Boost.Range metafunctions are defined by the following. </p> <div class="informaltable"><table class="table"> <colgroup> <col> <col> </colgroup> <thead><tr> <th> <p> Range metafunction </p> </th> <th> <p> Result </p> </th> </tr></thead> <tbody> <tr> <td> <p> <code class="computeroutput"><span class="identifier">range_value</span><span class="special"><</span><span class="keyword">const</span> <span class="identifier">Range</span><span class="special">>::</span><span class="identifier">type</span></code> </p> </td> <td> <p> <code class="computeroutput"><span class="identifier">range_value</span><span class="special"><</span><span class="identifier">Range</span><span class="special">>::</span><span class="identifier">type</span></code> </p> </td> </tr> <tr> <td> <p> <code class="computeroutput"><span class="identifier">range_difference</span><span class="special"><</span><span class="keyword">const</span> <span class="identifier">Range</span><span class="special">>::</span><span class="identifier">type</span></code> </p> </td> <td> <p> <code class="computeroutput"><span class="identifier">std</span><span class="special">::</span><span class="identifier">ptrdiff_t</span></code> </p> </td> </tr> <tr> <td> <p> <code class="computeroutput"><span class="identifier">range_pointer</span><span class="special"><</span><span class="keyword">const</span> <span class="identifier">Range</span><span class="special">>::</span><span class="identifier">type</span></code> </p> </td> <td> <p> <code class="computeroutput"><span class="identifier">add_pointer</span><span class="special"><</span><span class="identifier">remove_reference</span><span class="special"><</span><span class="identifier">range_reference</span><span class="special"><</span><span class="keyword">const</span> <span class="identifier">Range</span><span class="special">>::</span><span class="identifier">type</span><span class="special">>::</span><span class="identifier">type</span><span class="special">>::</span><span class="identifier">type</span></code> </p> </td> </tr> </tbody> </table></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 © 2003 -2010 Thorsten Ottosen, Neil Groves<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="atl_ranges.html"><img src="../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../mfc_atl.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="references.html"><img src="../../../../../../doc/src/images/next.png" alt="Next"></a> </div> </body> </html>