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- Copyright 2006 The Trustees of Indiana University
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- <Head>
- <Title>Reference Property Map</Title>
- <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:identity-property-map"></A>
- </h2>
- <PRE>
- template <typename KeyType, typename ValueType>
- class ref_property_map
- </PRE>
- This property map wraps a reference to some particular object, and
- returns that reference whenever a key object is input.
- <H3>Where Defined</H3>
- <P>
- <a href="../../../boost/property_map/property_map.hpp"><TT>boost/property_map/property_map.hpp</TT></a>
- <h3>Model of</h3>
- <a href="./LvaluePropertyMap.html">Lvalue Property Map</a>
- <h3>Associated Types</h3>
- <table border>
- <tr>
- <th>Type</th><th>Description</th>
- </tr>
- <tr>
- <td><tt>
- boost::property_traits<ref_property_map>::value_type
- </tt></td>
- <td>
- This type is the <tt>ValueType</tt> with which the template was instantiated.
- </td>
- </tr>
- <tr>
- <td><tt>
- boost::property_traits<ref_property_map>::key_type
- </tt></td>
- <td>
- This type is the <tt>KeyType</tt> with which the template was instantiated.
- </td>
- </tr>
- <tr>
- <td><tt>
- boost::property_traits<ref_property_map>::category
- </tt></td>
- <td>
- This type is <tt>boost::lvalue_property_map_tag</tt>.
- </td>
- </tr>
- </table>
- <h3>Member Functions</h3>
- <table border>
- <tr>
- <th>Member</th><th>Description</th>
- </tr>
- <tr>
- <td><tt>
- ref_property_map(ValueType& v)
- </tt></td>
- <td>
- The constructor for ref_property_map is provided the reference that
- the property map will return when queried.
- </td>
- </tr>
- <tr>
- <td><tt>
- ref_property_map(const ref_property_map& x)
- </tt></td>
- <td>
- Copy constructor.
- </td>
- </tr>
- <tr>
- <td><tt>
- ValueType& operator[](KeyType const&) const
- </tt></td>
- <td>
- Returns the contained reference.
- </td>
- </tr>
- </table>
- </BODY>
- </HTML>
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