1<html> 2<head> 3<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> 4<title>const Ranges</title> 5<link rel="stylesheet" href="../../../../../../doc/src/boostbook.css" type="text/css"> 6<meta name="generator" content="DocBook XSL Stylesheets V1.79.1"> 7<link rel="home" href="../../index.html" title="Chapter 1. Range 2.0"> 8<link rel="up" href="../mfc_atl.html" title="MFC/ATL (courtesy of Shunsuke Sogame)"> 9<link rel="prev" href="atl_ranges.html" title="ATL Ranges"> 10<link rel="next" href="references.html" title="References"> 11</head> 12<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"> 13<table cellpadding="2" width="100%"><tr> 14<td valign="top"><img alt="Boost C++ Libraries" width="277" height="86" src="../../../../../../boost.png"></td> 15<td align="center"><a href="../../../../../../index.html">Home</a></td> 16<td align="center"><a href="../../../../../../libs/libraries.htm">Libraries</a></td> 17<td align="center"><a href="http://www.boost.org/users/people.html">People</a></td> 18<td align="center"><a href="http://www.boost.org/users/faq.html">FAQ</a></td> 19<td align="center"><a href="../../../../../../more/index.htm">More</a></td> 20</tr></table> 21<hr> 22<div class="spirit-nav"> 23<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> 24</div> 25<div class="section"> 26<div class="titlepage"><div><div><h3 class="title"> 27<a name="range.mfc_atl.const_ranges"></a><a class="link" href="const_ranges.html" title="const Ranges">const Ranges</a> 28</h3></div></div></div> 29<p> 30 <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> 31 is defined by the following algorithm. Let <code class="computeroutput"><span class="identifier">Range</span></code> 32 be any type listed above and <code class="computeroutput"><span class="identifier">Ref</span></code> 33 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>. 34 </p> 35<p> 36</p> 37<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> 38 <span class="keyword">return</span> <span class="identifier">CObject</span> <span class="keyword">const</span> <span class="special">*</span> <span class="special">&</span> 39<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> 40 <span class="keyword">return</span> <span class="keyword">void</span> <span class="keyword">const</span> <span class="special">*</span> <span class="special">&</span> 41<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> 42 <span class="keyword">return</span> <span class="identifier">X</span> <span class="keyword">const</span> <span class="special">&</span> 43<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> 44 <span class="keyword">return</span> <span class="identifier">X</span> <span class="keyword">const</span> <span class="special">*</span> <span class="keyword">const</span> 45<span class="keyword">else</span> 46 <span class="keyword">return</span> <span class="identifier">Ref</span> 47</pre> 48<p> 49 </p> 50<p> 51 Other Boost.Range metafunctions are defined by the following. 52 </p> 53<div class="informaltable"><table class="table"> 54<colgroup> 55<col> 56<col> 57</colgroup> 58<thead><tr> 59<th> 60 <p> 61 Range metafunction 62 </p> 63 </th> 64<th> 65 <p> 66 Result 67 </p> 68 </th> 69</tr></thead> 70<tbody> 71<tr> 72<td> 73 <p> 74 <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> 75 </p> 76 </td> 77<td> 78 <p> 79 <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> 80 </p> 81 </td> 82</tr> 83<tr> 84<td> 85 <p> 86 <code class="computeroutput"><span class="identifier">range_difference</span><span class="special"><</span><span class="keyword">const</span> 87 <span class="identifier">Range</span><span class="special">>::</span><span class="identifier">type</span></code> 88 </p> 89 </td> 90<td> 91 <p> 92 <code class="computeroutput"><span class="identifier">std</span><span class="special">::</span><span class="identifier">ptrdiff_t</span></code> 93 </p> 94 </td> 95</tr> 96<tr> 97<td> 98 <p> 99 <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> 100 </p> 101 </td> 102<td> 103 <p> 104 <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> 105 </p> 106 </td> 107</tr> 108</tbody> 109</table></div> 110</div> 111<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> 112<td align="left"></td> 113<td align="right"><div class="copyright-footer">Copyright © 2003-2010 Thorsten Ottosen, 114 Neil Groves<p> 115 Distributed under the Boost Software License, Version 1.0. (See accompanying 116 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>) 117 </p> 118</div></td> 119</tr></table> 120<hr> 121<div class="spirit-nav"> 122<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> 123</div> 124</body> 125</html> 126
