132 lines
3.3 KiB
HTML
132 lines
3.3 KiB
HTML
<HTML>
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<!--
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Copyright (c) 2012 Trustees of Indiana University
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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>Value-Transforming Property Map Adaptor</Title>
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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><A NAME="sec:function-property-map"></A>
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</h2>
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<PRE>
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transform_value_property_map<UnaryFunction, PM, Ref>
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</PRE>
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<P>
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This property map is an adaptor that composes a function object after an existing property map. The new property map will model either <a href="ReadablePropertyMap.html">Readable Property Map</a> or a <a href="LvaluePropertyMap.html">Lvalue Property Map</a>. The category of the property map is based on whether the function's return type (as given by <tt>Ref</tt>) is a non-const reference type.
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<P>
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<!-- <h3>Example</h3>
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<pre>
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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/transform_value_property_map.hpp"><TT>boost/property_map/transform_value_property_map.hpp</TT></a>
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<p>
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<H3>Model Of</H3>
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<a href="./ReadablePropertyMap.html">Readable Property Map</a> or <a href="./LvaluePropertyMap.html">Lvalue Property Map</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><th>Default</th>
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</tr>
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<TR>
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<TD><TT>UnaryFunction</TT></TD>
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<TD>Must be a model of <a href="http://www.sgi.com/tech/stl/UnaryFunction.html">Unary Function</a> that accepts an object of type <tt>property_traits<PM>::reference</tt> as an argument and returns a result of type <tt>Ref</tt>.</TD>
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<TD> </td>
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</tr>
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<TR>
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<TD><TT>PM</TT></TD> <TD>The underlying property map.
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</TD> <TD> </TD>
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</TR>
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<TR>
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<TD><TT>Ref</TT></TD>
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<TD>The result type of the function.</TD>
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<TD><TT>boost::result_of<const UnaryFunction(property_traits<PM>::reference)>::type</TT></TD>
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</TR>
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</TABLE>
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<P>
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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 <a
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href="./ReadablePropertyMap.html">Readable Property Map</a> or <a href="LvaluePropertyMap.html">Lvalue Property Map</a>, this
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class has the following members:
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<hr>
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<pre>
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property_traits<transform_value_property_map>::value_type
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</pre>
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The type <tt>Ref</tt> with any reference or cv-qualifiers removed.
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<hr>
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<pre>
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transform_value_property_map(const UnaryFunction& f, const PM& pm);
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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 PM, class UnaryFunction>
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transform_value_property_map<UnaryFunction, PM>
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make_transform_value_property_map(const UnaryFunction& f, const PM& pm);
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</pre>
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Returns a <tt>transform_value_property_map</tt> using the given function and property map type.
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<hr>
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<pre>
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template <class Ref, class PM, class UnaryFunction>
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transform_value_property_map<UnaryFunction, PM, Ref>
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make_transform_value_property_map(const UnaryFunction& f, const PM& pm);
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</pre>
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Returns a <tt>transform_value_property_map</tt> using the given function and property map, explicitly giving the function's result type.
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<hr>
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<br>
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<HR>
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<TABLE>
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<TR valign=top>
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<TD nowrap>Copyright © 2012</TD><TD>Trustees of Indiana University
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</TD></TR></TABLE>
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</BODY>
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</HTML>
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