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| <div class="titlepage"><div><div><h3 class="title"> |
| <a name="range.concepts.random_access_range"></a><a class="link" href="random_access_range.html" title="Random Access Range">Random Access Range</a> |
| </h3></div></div></div> |
| <a name="range.concepts.random_access_range.description"></a><h5> |
| <a name="id763341"></a> |
| <a class="link" href="random_access_range.html#range.concepts.random_access_range.description">Description</a> |
| </h5> |
| <p> |
| A range <code class="computeroutput"><span class="identifier">X</span></code> where <code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">range_iterator</span><span class="special"><</span><span class="identifier">X</span><span class="special">>::</span><span class="identifier">type</span></code> is a model of <a href="../../../../../../libs/iterator/doc/new-iter-concepts.html#random-access-traversal-iterators-lib-random-access-traversal-iterators" target="_top">Random |
| Access Traversal Iterator</a>. |
| </p> |
| <a name="range.concepts.random_access_range.refinement_of"></a><h5> |
| <a name="id763409"></a> |
| <a class="link" href="random_access_range.html#range.concepts.random_access_range.refinement_of">Refinement |
| of</a> |
| </h5> |
| <p> |
| <a class="link" href="bidirectional_range.html" title="Bidirectional Range">Bidirectional Range</a> |
| </p> |
| <a name="range.concepts.random_access_range.valid_expressions"></a><h5> |
| <a name="id763438"></a> |
| <a class="link" href="random_access_range.html#range.concepts.random_access_range.valid_expressions">Valid |
| expressions</a> |
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| <div class="informaltable"><table class="table"> |
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| Name |
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| Expression |
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| <th> |
| <p> |
| Return type |
| </p> |
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| <td> |
| <p> |
| Size of range |
| </p> |
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| <td> |
| <p> |
| <code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">size</span><span class="special">(</span><span class="identifier">a</span><span class="special">)</span></code> |
| </p> |
| </td> |
| <td> |
| <p> |
| <code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">range_size</span><span class="special"><</span><span class="identifier">X</span><span class="special">>::</span><span class="identifier">type</span></code> |
| </p> |
| </td> |
| </tr></tbody> |
| </table></div> |
| <a name="range.concepts.random_access_range.expression_semantics"></a><h5> |
| <a name="id763581"></a> |
| <a class="link" href="random_access_range.html#range.concepts.random_access_range.expression_semantics">Expression |
| semantics</a> |
| </h5> |
| <div class="informaltable"><table class="table"> |
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| <col> |
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| <th> |
| <p> |
| Expression |
| </p> |
| </th> |
| <th> |
| <p> |
| Semantics |
| </p> |
| </th> |
| <th> |
| <p> |
| Postcondition |
| </p> |
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| <p> |
| <code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">size</span><span class="special">(</span><span class="identifier">a</span><span class="special">)</span></code> |
| </p> |
| </td> |
| <td> |
| <p> |
| Returns the size of the Range, that is, its number of elements. |
| Note <code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">size</span><span class="special">(</span><span class="identifier">a</span><span class="special">)</span> |
| <span class="special">==</span> <span class="number">0u</span></code> |
| is equivalent to <code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">empty</span><span class="special">(</span><span class="identifier">a</span><span class="special">)</span></code>. |
| </p> |
| </td> |
| <td> |
| <p> |
| <code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">size</span><span class="special">(</span><span class="identifier">a</span><span class="special">)</span> |
| <span class="special">>=</span> <span class="number">0</span></code> |
| </p> |
| </td> |
| </tr></tbody> |
| </table></div> |
| <a name="range.concepts.random_access_range.complexity_guarantees"></a><h5> |
| <a name="id763798"></a> |
| <a class="link" href="random_access_range.html#range.concepts.random_access_range.complexity_guarantees">Complexity |
| guarantees</a> |
| </h5> |
| <p> |
| <code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">size</span><span class="special">(</span><span class="identifier">a</span><span class="special">)</span></code> completes in amortized constant time. |
| </p> |
| <a name="range.concepts.random_access_range.invariants"></a><h5> |
| <a name="id763849"></a> |
| <a class="link" href="random_access_range.html#range.concepts.random_access_range.invariants">Invariants</a> |
| </h5> |
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| <td> |
| <p> |
| Range size |
| </p> |
| </td> |
| <td> |
| <p> |
| <code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">size</span><span class="special">(</span><span class="identifier">a</span><span class="special">)</span></code> |
| is equal to the <code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">end</span><span class="special">(</span><span class="identifier">a</span><span class="special">)</span></code> - <code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">begin</span><span class="special">(</span><span class="identifier">a</span><span class="special">)</span></code>. |
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| <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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