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Boost library as in https://sourceforge.net/projects/boost/files/boost/1.57.0/

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