151 lines
2.9 KiB
HTML
151 lines
2.9 KiB
HTML
<html>
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<!--
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Copyright (c) 2013 Eurodecision
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Authors: Guillaume Pinot
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Distributed under the Boost Software License, Version 1.0.
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(See accompanying file LICENSE_1_0.txt or copy at
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http://www.boost.org/LICENSE_1_0.txt)
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-->
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<head>
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<title>Compose Property Map Adaptor</title>
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</head>
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<body bgcolor="#ffffff" link="#0000ee" text="#000000" vlink="#551a8b"
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alink="#ff0000">
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<img src="../../../boost.png"
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alt="C++ Boost" width="277" height="86">
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<br Clear>
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<h2>
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<a name="sec:compose-property-map"></a>Compose Property Map
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Adaptor
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</h2>
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<pre>
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compose_property_map<FPMap, GPMap>
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</pre>
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<p>
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This property map is an adaptor that composes two property map. The
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new property map will of the same model
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as <tt>FPMap</tt>. <tt>GPMap</tt> must
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model <a href="./ReadablePropertyMap.html">Readable Property Map</a>.
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</p>
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<h3>Example</h3>
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<a href="../example/compose_property_map_example.cpp">compose_property_map_example.cpp</a>:
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<pre>
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#include <boost/property_map/compose_property_map.hpp>
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#include <iostream>
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int main()
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{
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const int idx[] = {2, 0, 4, 1, 3};
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double v[] = {1., 3., 0., 4., 2.};
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boost::compose_property_map<double*, const int*> cpm(v, idx);
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for (int i = 0; i < 5; ++i)
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std::cout << get(cpm, i) << " ";
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std::cout << std::endl;
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for (int i = 0; i < 5; ++i)
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++cpm[i];
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for (int i = 0; i < 5; ++i)
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std::cout << get(cpm, i) << " ";
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std::cout << std::endl;
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for (int i = 0; i < 5; ++i)
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put(cpm, i, 42.);
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for (int i = 0; i < 5; ++i)
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std::cout << get(cpm, i) << " ";
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std::cout << std::endl;
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return 0;
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}
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</pre>
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<p>Output:</p>
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<pre>
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0 1 2 3 4
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1 2 3 4 5
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42 42 42 42 42
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</pre>
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<h3>Where Defined</h3>
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<p>
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<a href="../../../boost/property_map/compose_property_map.hpp"><tt>boost/property_map/compose_property_map.hpp</tt></a>
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</p>
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<h3>Template Parameters</h3>
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<P>
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<table border>
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<tr>
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<th>Parameter</th><th>Description</th>
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</tr>
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<tr>
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<td><tt>FPMap</tt></td>
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<td>Must be a property map of any kind.</td>
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</tr>
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<tr>
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<td><tt>GPMap</tt></td>
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<td>Must be a model of <a href="./ReadablePropertyMap.html">Readable Property Map</a>.</td>
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</tr>
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</table>
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<H3>Members</H3>
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<p>
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In addition to the methods and functions required by property maps,
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this class has the following members:
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</p>
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<hr>
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<pre>
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compose_property_map(const FPMap& f, const GPMap& g);
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</pre>
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Constructor.
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<hr>
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<h3>Non-Member functions</h3>
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<hr>
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<pre>
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template <class FPMap, class GPMap>
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compose_property_map<FPMap, GPMap>
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make_compose_property_map(const FPMap& f, const GPMap& g);
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</pre>
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Returns a <tt>compose_property_map</tt> using the given property maps type.
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<hr>
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<table>
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<tr valign="top">
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<td nowrap>Copyright © 2013</td>
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<td>Eurodecision</td>
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</tr>
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<tr valign="top">
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<td nowrap>Author:</td>
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<td>Guillaume Pinot</td>
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</tr>
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</table>
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</body>
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</html>
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