1<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> 2<html> 3<head> 4<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> 5<title>Struct template extractor</title> 6<link rel="stylesheet" href="../../../../doc/src/boostbook.css" type="text/css"> 7<meta name="generator" content="DocBook XSL Stylesheets V1.79.1"> 8<link rel="home" href="../../index.html" title="The Boost C++ Libraries BoostBook Documentation Subset"> 9<link rel="up" href="../../accumulators/reference.html#header.boost.accumulators.accumulators_fwd_hpp" title="Header <boost/accumulators/accumulators_fwd.hpp>"> 10<link rel="prev" href="droppable_accumulator_base.html" title="Struct template droppable_accumulator_base"> 11<link rel="next" href="feature_of.html" title="Struct template feature_of"> 12</head> 13<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"> 14<table cellpadding="2" width="100%"><tr> 15<td valign="top"><img 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alt="Next"></a> 25</div> 26<div class="refentry"> 27<a name="boost.accumulators.extractor"></a><div class="titlepage"></div> 28<div class="refnamediv"> 29<h2><span class="refentrytitle">Struct template extractor</span></h2> 30<p>boost::accumulators::extractor — Extracts the result associated with Feature from the specified <a class="link" href="accumulator_set.html" title="Struct template accumulator_set">accumulator_set</a>. </p> 31</div> 32<h2 xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv-title">Synopsis</h2> 33<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="../../accumulators/reference.html#header.boost.accumulators.accumulators_fwd_hpp" title="Header <boost/accumulators/accumulators_fwd.hpp>">boost/accumulators/accumulators_fwd.hpp</a>> 34 35</span><span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> Feature<span class="special">></span> 36<span class="keyword">struct</span> <a class="link" href="extractor.html" title="Struct template extractor">extractor</a> <span class="special">{</span> 37 38 <span class="comment">// <a class="link" href="extractor.html#id-1_3_2_6_2_3_1_1_7_3-bb">public member functions</a></span> 39 <span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> Arg1<span class="special">></span> <span class="emphasis"><em><span class="identifier">unspecified</span></em></span> <a class="link" href="extractor.html#id-1_3_2_6_2_3_1_1_7_3_1-bb"><span class="keyword">operator</span><span class="special">(</span><span class="special">)</span></a><span class="special">(</span><span class="identifier">Arg1</span> <span class="keyword">const</span> <span class="special">&</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span> 40 <span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> AccumulatorSet<span class="special">,</span> <span class="keyword">typename</span> A1<span class="special">></span> 41 <span class="emphasis"><em><span class="identifier">unspecified</span></em></span> <a class="link" href="extractor.html#id-1_3_2_6_2_3_1_1_7_3_2-bb"><span class="keyword">operator</span><span class="special">(</span><span class="special">)</span></a><span class="special">(</span><span class="identifier">AccumulatorSet</span> <span class="keyword">const</span> <span class="special">&</span><span class="special">,</span> <span class="identifier">A1</span> <span class="keyword">const</span> <span class="special">&</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span> 42 <span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> AccumulatorSet<span class="special">,</span> <span class="keyword">typename</span> A1<span class="special">,</span> <span class="keyword">typename</span> A2<span class="special">,</span> <span class="special">...</span> <span class="special">></span> 43 <span class="emphasis"><em><span class="identifier">unspecified</span></em></span> <a class="link" href="extractor.html#id-1_3_2_6_2_3_1_1_7_3_3-bb"><span class="keyword">operator</span><span class="special">(</span><span class="special">)</span></a><span class="special">(</span><span class="identifier">AccumulatorSet</span> <span class="keyword">const</span> <span class="special">&</span><span class="special">,</span> <span class="identifier">A1</span> <span class="keyword">const</span> <span class="special">&</span><span class="special">,</span> <span class="identifier">A2</span> <span class="keyword">const</span> <span class="special">&</span><span class="special">,</span> 44 <span class="special">...</span><span class="special">)</span><span class="special">;</span> 45<span class="special">}</span><span class="special">;</span></pre></div> 46<div class="refsect1"> 47<a name="id-1.3.2.6.2.3.16.4"></a><h2>Description</h2> 48<div class="refsect2"> 49<a name="id-1.3.2.6.2.3.16.4.2"></a><h3> 50<a name="id-1_3_2_6_2_3_1_1_7_3-bb"></a><code class="computeroutput">extractor</code> public member functions</h3> 51<div class="orderedlist"><ol class="orderedlist" type="1"> 52<li class="listitem"> 53<pre class="literallayout"><span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> Arg1<span class="special">></span> <span class="emphasis"><em><span class="identifier">unspecified</span></em></span> <a name="id-1_3_2_6_2_3_1_1_7_3_1-bb"></a><span class="keyword">operator</span><span class="special">(</span><span class="special">)</span><span class="special">(</span><span class="identifier">Arg1</span> <span class="keyword">const</span> <span class="special">&</span> arg1<span class="special">)</span> <span class="keyword">const</span><span class="special">;</span></pre> 54<p>Extract the result associated with Feature from the accumulator set 55</p> 56</li> 57<li class="listitem"> 58<pre class="literallayout"><span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> AccumulatorSet<span class="special">,</span> <span class="keyword">typename</span> A1<span class="special">></span> 59 <span class="emphasis"><em><span class="identifier">unspecified</span></em></span> <a name="id-1_3_2_6_2_3_1_1_7_3_2-bb"></a><span class="keyword">operator</span><span class="special">(</span><span class="special">)</span><span class="special">(</span><span class="identifier">AccumulatorSet</span> <span class="keyword">const</span> <span class="special">&</span> acc<span class="special">,</span> <span class="identifier">A1</span> <span class="keyword">const</span> <span class="special">&</span> a1<span class="special">)</span> <span class="keyword">const</span><span class="special">;</span></pre> 60<p>This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.</p> 61<p> 62</p> 63<div class="variablelist"><table border="0" class="variablelist compact"> 64<colgroup> 65<col align="left" valign="top"> 66<col> 67</colgroup> 68<tbody><tr> 69<td><p><span class="term">Parameters:</span></p></td> 70<td><div class="variablelist"><table border="0" class="variablelist compact"> 71<colgroup> 72<col align="left" valign="top"> 73<col> 74</colgroup> 75<tbody><tr> 76<td><p><span class="term"><code class="computeroutput">a1</code></span></p></td> 77<td><p>Optional named parameter to be passed to the accumulator's result() function. </p></td> 78</tr></tbody> 79</table></div></td> 80</tr></tbody> 81</table></div> 82</li> 83<li class="listitem"> 84<pre class="literallayout"><span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> AccumulatorSet<span class="special">,</span> <span class="keyword">typename</span> A1<span class="special">,</span> <span class="keyword">typename</span> A2<span class="special">,</span> <span class="special">...</span> <span class="special">></span> 85 <span class="emphasis"><em><span class="identifier">unspecified</span></em></span> <a name="id-1_3_2_6_2_3_1_1_7_3_3-bb"></a><span class="keyword">operator</span><span class="special">(</span><span class="special">)</span><span class="special">(</span><span class="identifier">AccumulatorSet</span> <span class="keyword">const</span> <span class="special">&</span> acc<span class="special">,</span> <span class="identifier">A1</span> <span class="keyword">const</span> <span class="special">&</span> a1<span class="special">,</span> 86 <span class="identifier">A2</span> <span class="keyword">const</span> <span class="special">&</span> a2<span class="special">,</span> <span class="special">...</span><span class="special">)</span><span class="special">;</span></pre> 87<p>This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. </p> 88</li> 89</ol></div> 90</div> 91</div> 92</div> 93<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> 94<td align="left"></td> 95<td align="right"><div class="copyright-footer">Copyright © 2005, 2006 Eric Niebler<p> 96 Distributed under the Boost Software License, Version 1.0. (See accompanying 97 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>) 98 </p> 99</div></td> 100</tr></table> 101<hr> 102<div class="spirit-nav"> 103<a accesskey="p" href="droppable_accumulator_base.html"><img src="../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../../accumulators/reference.html#header.boost.accumulators.accumulators_fwd_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="feature_of.html"><img src="../../../../doc/src/images/next.png" alt="Next"></a> 104</div> 105</body> 106</html> 107
