1<html> 2<head> 3<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> 4<title>Class template transform_iterator</title> 5<link rel="stylesheet" href="../../../../../../doc/src/boostbook.css" type="text/css"> 6<meta name="generator" content="DocBook XSL Stylesheets V1.79.1"> 7<link rel="home" href="../../index.html" title="Chapter 1. Boost.Compute"> 8<link rel="up" href="../../boost_compute/reference.html#header.boost.compute.iterator.transform_iterator_hpp" title="Header <boost/compute/iterator/transform_iterator.hpp>"> 9<link rel="prev" href="make_strided_iterator_end.html" title="Function template make_strided_iterator_end"> 10<link rel="next" href="make_transform_iterator.html" title="Function template make_transform_iterator"> 11</head> 12<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"> 13<table cellpadding="2" width="100%"><tr> 14<td valign="top"><img alt="Boost C++ Libraries" width="277" height="86" src="../../../../../../boost.png"></td> 15<td align="center"><a href="../../../../../../index.html">Home</a></td> 16<td align="center"><a href="../../../../../../libs/libraries.htm">Libraries</a></td> 17<td align="center"><a href="http://www.boost.org/users/people.html">People</a></td> 18<td align="center"><a href="http://www.boost.org/users/faq.html">FAQ</a></td> 19<td align="center"><a href="../../../../../../more/index.htm">More</a></td> 20</tr></table> 21<hr> 22<div class="spirit-nav"> 23<a accesskey="p" href="make_strided_iterator_end.html"><img src="../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../../boost_compute/reference.html#header.boost.compute.iterator.transform_iterator_hpp"><img src="../../../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="make_transform_iterator.html"><img src="../../../../../../doc/src/images/next.png" alt="Next"></a> 24</div> 25<div class="refentry"> 26<a name="boost.compute.transform_iterator"></a><div class="titlepage"></div> 27<div class="refnamediv"> 28<h2><span class="refentrytitle">Class template transform_iterator</span></h2> 29<p>boost::compute::transform_iterator — A transform iterator adaptor. </p> 30</div> 31<h2 xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv-title">Synopsis</h2> 32<div xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv"><pre class="synopsis"><span class="comment">// In header: <<a class="link" href="../../boost_compute/reference.html#header.boost.compute.iterator.transform_iterator_hpp" title="Header <boost/compute/iterator/transform_iterator.hpp>">boost/compute/iterator/transform_iterator.hpp</a>> 33 34</span><span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> InputIterator<span class="special">,</span> <span class="keyword">typename</span> UnaryFunction<span class="special">></span> 35<span class="keyword">class</span> <a class="link" href="transform_iterator.html" title="Class template transform_iterator">transform_iterator</a> <span class="special">{</span> 36<span class="keyword">public</span><span class="special">:</span> 37 <span class="comment">// types</span> 38 <span class="keyword">typedef</span> <span class="emphasis"><em><span class="identifier">unspecified</span></em></span> <a name="boost.compute.transform_iterator.super_type"></a><span class="identifier">super_type</span><span class="special">;</span> 39 <span class="keyword">typedef</span> <span class="identifier">super_type</span><span class="special">::</span><span class="identifier">value_type</span> <a name="boost.compute.transform_iterator.value_type"></a><span class="identifier">value_type</span><span class="special">;</span> 40 <span class="keyword">typedef</span> <span class="identifier">super_type</span><span class="special">::</span><span class="identifier">reference</span> <a name="boost.compute.transform_iterator.reference"></a><span class="identifier">reference</span><span class="special">;</span> 41 <span class="keyword">typedef</span> <span class="identifier">super_type</span><span class="special">::</span><span class="identifier">base_type</span> <a name="boost.compute.transform_iterator.base_type"></a><span class="identifier">base_type</span><span class="special">;</span> 42 <span class="keyword">typedef</span> <span class="identifier">super_type</span><span class="special">::</span><span class="identifier">difference_type</span> <a name="boost.compute.transform_iterator.difference_type"></a><span class="identifier">difference_type</span><span class="special">;</span> 43 <span class="keyword">typedef</span> <span class="identifier">UnaryFunction</span> <a name="boost.compute.transform_iterator.unary_function"></a><span class="identifier">unary_function</span><span class="special">;</span> 44 45 <span class="comment">// <a class="link" href="transform_iterator.html#boost.compute.transform_iteratorconstruct-copy-destruct">construct/copy/destruct</a></span> 46 <a class="link" href="transform_iterator.html#idm45549384578256-bb"><span class="identifier">transform_iterator</span></a><span class="special">(</span><span class="identifier">InputIterator</span><span class="special">,</span> <span class="identifier">UnaryFunction</span><span class="special">)</span><span class="special">;</span> 47 <a class="link" href="transform_iterator.html#idm45549384576592-bb"><span class="identifier">transform_iterator</span></a><span class="special">(</span><span class="keyword">const</span> <a class="link" href="transform_iterator.html" title="Class template transform_iterator">transform_iterator</a><span class="special"><</span> <span class="identifier">InputIterator</span><span class="special">,</span> <span class="identifier">UnaryFunction</span> <span class="special">></span> <span class="special">&</span><span class="special">)</span><span class="special">;</span> 48 <a class="link" href="transform_iterator.html" title="Class template transform_iterator">transform_iterator</a><span class="special"><</span> <span class="identifier">InputIterator</span><span class="special">,</span> <span class="identifier">UnaryFunction</span> <span class="special">></span> <span class="special">&</span> 49 <a class="link" href="transform_iterator.html#idm45549384575152-bb"><span class="keyword">operator</span><span class="special">=</span></a><span class="special">(</span><span class="keyword">const</span> <a class="link" href="transform_iterator.html" title="Class template transform_iterator">transform_iterator</a><span class="special"><</span> <span class="identifier">InputIterator</span><span class="special">,</span> <span class="identifier">UnaryFunction</span> <span class="special">></span> <span class="special">&</span><span class="special">)</span><span class="special">;</span> 50 <a class="link" href="transform_iterator.html#idm45549384573120-bb"><span class="special">~</span><span class="identifier">transform_iterator</span></a><span class="special">(</span><span class="special">)</span><span class="special">;</span> 51 52 <span class="comment">// <a class="link" href="transform_iterator.html#idm45549384584000-bb">public member functions</a></span> 53 <span class="identifier">size_t</span> <a class="link" href="transform_iterator.html#idm45549384583440-bb"><span class="identifier">get_index</span></a><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span> 54 <span class="keyword">const</span> <span class="identifier">buffer</span> <span class="special">&</span> <a class="link" href="transform_iterator.html#idm45549384582320-bb"><span class="identifier">get_buffer</span></a><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span> 55 <span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> IndexExpression<span class="special">></span> 56 <span class="emphasis"><em><span class="identifier">unspecified</span></em></span> <a class="link" href="transform_iterator.html#idm45549384581200-bb"><span class="keyword">operator</span><span class="special">[</span><span class="special">]</span></a><span class="special">(</span><span class="keyword">const</span> <span class="identifier">IndexExpression</span> <span class="special">&</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span> 57 58 <span class="comment">// <a class="link" href="transform_iterator.html#idm45549384572832-bb">private member functions</a></span> 59 <span class="identifier">reference</span> <a class="link" href="transform_iterator.html#idm45549384572256-bb"><span class="identifier">dereference</span></a><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span> 60<span class="special">}</span><span class="special">;</span></pre></div> 61<div class="refsect1"> 62<a name="idm45849506190224"></a><h2>Description</h2> 63<p>The <a class="link" href="transform_iterator.html" title="Class template transform_iterator">transform_iterator</a> adaptor applies a unary function to each element produced from the underlying iterator when dereferenced.</p> 64<p>For example, to copy from an input range to an output range while taking the absolute value of each element:</p> 65<pre class="programlisting"></pre> 66<p> </p> 67<p><span class="bold"><strong>See Also:</strong></span></p> 68<p><a class="link" href="buffer_iterator.html" title="Class template buffer_iterator">buffer_iterator</a>, make_transform_iterator() </p> 69<p> 70</p> 71<p> 72</p> 73<div class="refsect2"> 74<a name="idm45849506185568"></a><h3> 75<a name="boost.compute.transform_iteratorconstruct-copy-destruct"></a><code class="computeroutput">transform_iterator</code> 76 public 77 construct/copy/destruct</h3> 78<div class="orderedlist"><ol class="orderedlist" type="1"> 79<li class="listitem"><pre class="literallayout"><a name="idm45549384578256-bb"></a><span class="identifier">transform_iterator</span><span class="special">(</span><span class="identifier">InputIterator</span> iterator<span class="special">,</span> <span class="identifier">UnaryFunction</span> transform<span class="special">)</span><span class="special">;</span></pre></li> 80<li class="listitem"><pre class="literallayout"><a name="idm45549384576592-bb"></a><span class="identifier">transform_iterator</span><span class="special">(</span><span class="keyword">const</span> <a class="link" href="transform_iterator.html" title="Class template transform_iterator">transform_iterator</a><span class="special"><</span> <span class="identifier">InputIterator</span><span class="special">,</span> <span class="identifier">UnaryFunction</span> <span class="special">></span> <span class="special">&</span> other<span class="special">)</span><span class="special">;</span></pre></li> 81<li class="listitem"><pre class="literallayout"><a class="link" href="transform_iterator.html" title="Class template transform_iterator">transform_iterator</a><span class="special"><</span> <span class="identifier">InputIterator</span><span class="special">,</span> <span class="identifier">UnaryFunction</span> <span class="special">></span> <span class="special">&</span> 82<a name="idm45549384575152-bb"></a><span class="keyword">operator</span><span class="special">=</span><span class="special">(</span><span class="keyword">const</span> <a class="link" href="transform_iterator.html" title="Class template transform_iterator">transform_iterator</a><span class="special"><</span> <span class="identifier">InputIterator</span><span class="special">,</span> <span class="identifier">UnaryFunction</span> <span class="special">></span> <span class="special">&</span> other<span class="special">)</span><span class="special">;</span></pre></li> 83<li class="listitem"><pre class="literallayout"><a name="idm45549384573120-bb"></a><span class="special">~</span><span class="identifier">transform_iterator</span><span class="special">(</span><span class="special">)</span><span class="special">;</span></pre></li> 84</ol></div> 85</div> 86<div class="refsect2"> 87<a name="idm45849506150272"></a><h3> 88<a name="idm45549384584000-bb"></a><code class="computeroutput">transform_iterator</code> public member functions</h3> 89<div class="orderedlist"><ol class="orderedlist" type="1"> 90<li class="listitem"><pre class="literallayout"><span class="identifier">size_t</span> <a name="idm45549384583440-bb"></a><span class="identifier">get_index</span><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span></pre></li> 91<li class="listitem"><pre class="literallayout"><span class="keyword">const</span> <span class="identifier">buffer</span> <span class="special">&</span> <a name="idm45549384582320-bb"></a><span class="identifier">get_buffer</span><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span></pre></li> 92<li class="listitem"><pre class="literallayout"><span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> IndexExpression<span class="special">></span> 93 <span class="emphasis"><em><span class="identifier">unspecified</span></em></span> <a name="idm45549384581200-bb"></a><span class="keyword">operator</span><span class="special">[</span><span class="special">]</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">IndexExpression</span> <span class="special">&</span> expr<span class="special">)</span> <span class="keyword">const</span><span class="special">;</span></pre></li> 94</ol></div> 95</div> 96<div class="refsect2"> 97<a name="idm45849506126016"></a><h3> 98<a name="idm45549384572832-bb"></a><code class="computeroutput">transform_iterator</code> private member functions</h3> 99<div class="orderedlist"><ol class="orderedlist" type="1"><li class="listitem"><pre class="literallayout"><span class="identifier">reference</span> <a name="idm45549384572256-bb"></a><span class="identifier">dereference</span><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span></pre></li></ol></div> 100</div> 101</div> 102</div> 103<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> 104<td align="left"></td> 105<td align="right"><div class="copyright-footer">Copyright © 2013, 2014 Kyle Lutz<p> 106 Distributed under the Boost Software License, Version 1.0. (See accompanying 107 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>) 108 </p> 109</div></td> 110</tr></table> 111<hr> 112<div class="spirit-nav"> 113<a accesskey="p" href="make_strided_iterator_end.html"><img src="../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../../boost_compute/reference.html#header.boost.compute.iterator.transform_iterator_hpp"><img src="../../../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="make_transform_iterator.html"><img src="../../../../../../doc/src/images/next.png" alt="Next"></a> 114</div> 115</body> 116</html> 117
