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| <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> |
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| <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>) |
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