<html> <head> <meta http-equiv="Content-Type" content="text/html; charset=US-ASCII"> <title>accumulate</title> <link rel="stylesheet" href="../../../../../../../../doc/src/boostbook.css" type="text/css"> <meta name="generator" content="DocBook XSL Stylesheets V1.75.2"> <link rel="home" href="../../../../index.html" title="Chapter 1. Fusion 2.0"> <link rel="up" href="../metafunctions.html" title="Metafunctions"> <link rel="prev" href="reverse_iter_fold.html" title="reverse_iter_fold"> <link rel="next" href="for_each.html" title="for_each"> </head> <body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"> <table cellpadding="2" width="100%"><tr> <td valign="top"><img alt="Boost C++ Libraries" width="277" height="86" src="../../../../../../../../boost.png"></td> <td align="center"><a href="../../../../../../../../index.html">Home</a></td> <td align="center"><a href="../../../../../../../../libs/libraries.htm">Libraries</a></td> <td align="center"><a 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name="fusion.algorithm.iteration.metafunctions.accumulate.description"></a><h6> <a name="id1033256"></a> <a class="link" href="accumulate.html#fusion.algorithm.iteration.metafunctions.accumulate.description">Description</a> </h6> <p> Returns the result type of <a class="link" href="../functions/accumulate.html" title="accumulate"><code class="computeroutput"><span class="identifier">accumulate</span></code></a>. </p> <a name="fusion.algorithm.iteration.metafunctions.accumulate.synopsis"></a><h6> <a name="id1033834"></a> <a class="link" href="accumulate.html#fusion.algorithm.iteration.metafunctions.accumulate.synopsis">Synopsis</a> </h6> <pre class="programlisting"><span class="keyword">template</span><span class="special"><</span> <span class="keyword">typename</span> <span class="identifier">Sequence</span><span class="special">,</span> <span class="keyword">typename</span> <span class="identifier">State</span><span class="special">,</span> <span class="keyword">typename</span> <span class="identifier">F</span><span class="special">></span> <span class="keyword">struct</span> accumulate <span class="special">{</span> <span class="keyword">typedef</span> <span class="emphasis"><em>unspecified</em></span> <span class="identifier">type</span><span class="special">;</span> <span class="special">};</span> </pre> <div class="table"> <a name="id1033929"></a><p class="title"><b>Table 1.47. Parameters</b></p> <div class="table-contents"><table class="table" summary="Parameters"> <colgroup> <col> <col> <col> </colgroup> <thead><tr> <th> <p> Parameter </p> </th> <th> <p> Requirement </p> </th> <th> <p> Description </p> </th> </tr></thead> <tbody> <tr> <td> <p> <code class="computeroutput"><span class="identifier">Sequence</span></code> </p> </td> <td> <p> A model of <a class="link" href="../../../sequence/concepts/forward_sequence.html" title="Forward Sequence">Forward Sequence</a> </p> </td> <td> <p> The sequence to iterate </p> </td> </tr> <tr> <td> <p> <code class="computeroutput"><span class="identifier">State</span></code> </p> </td> <td> <p> Any type </p> </td> <td> <p> The initial state for the first application of <code class="computeroutput"><span class="identifier">F</span></code> </p> </td> </tr> <tr> <td> <p> <code class="computeroutput"><span class="identifier">F</span></code> </p> </td> <td> <p> <code class="computeroutput"><a href="http://www.boost.org/libs/utility/utility.htm#result_of" target="_top"><code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">result_of</span></code></a><span class="special"><</span><span class="identifier">F</span><span class="special">(</span><span class="identifier">S</span><span class="special">,</span>E<span class="special">)>::</span><span class="identifier">type</span></code> is the return type of <code class="computeroutput"><span class="identifier">f</span><span class="special">(</span><span class="identifier">s</span><span class="special">,</span>e<span class="special">)</span></code> with current state <code class="computeroutput"><span class="identifier">s</span></code> of type <code class="computeroutput"><span class="identifier">S</span></code>, and an element <code class="computeroutput"><span class="identifier">e</span></code> of type <code class="computeroutput"><span class="identifier">E</span></code> in <code class="computeroutput"><span class="identifier">seq</span></code> </p> </td> <td> <p> The operation to be applied on traversal </p> </td> </tr> </tbody> </table></div> </div> <br class="table-break"><a name="fusion.algorithm.iteration.metafunctions.accumulate.expression_semantics"></a><h6> <a name="id1034192"></a> <a class="link" href="accumulate.html#fusion.algorithm.iteration.metafunctions.accumulate.expression_semantics">Expression Semantics</a> </h6> <pre class="programlisting">accumulate<span class="special"><</span><span class="identifier">Sequence</span><span class="special">,</span> <span class="identifier">State</span><span class="special">,</span> <span class="identifier">F</span><span class="special">>::</span><span class="identifier">type</span> </pre> <p> <span class="bold"><strong>Return type</strong></span>: Any type </p> <p> <span class="bold"><strong>Semantics</strong></span>: Returns the result of applying <a class="link" href="../functions/accumulate.html" title="accumulate"><code class="computeroutput"><span class="identifier">accumulate</span></code></a> to a sequence of type <code class="computeroutput"><span class="identifier">Sequence</span></code>, with an initial state of type <code class="computeroutput"><span class="identifier">State</span></code> and binary function object or function pointer of type <code class="computeroutput"><span class="identifier">F</span></code>. </p> <a name="fusion.algorithm.iteration.metafunctions.accumulate.complexity"></a><h6> <a name="id1034292"></a> <a class="link" href="accumulate.html#fusion.algorithm.iteration.metafunctions.accumulate.complexity">Complexity</a> </h6> <p> Linear, exactly <code class="computeroutput"><a class="link" href="../../../sequence/intrinsic/metafunctions/size.html" title="size"><code class="computeroutput"><span class="identifier">result_of</span><span class="special">::</span><span class="identifier">size</span></code></a><span class="special"><</span><span class="identifier">Sequence</span><span class="special">>::</span><span class="identifier">value</span></code> applications of <code class="computeroutput"><span class="identifier">F</span></code>. </p> <a name="fusion.algorithm.iteration.metafunctions.accumulate.header"></a><h6> <a name="id1034355"></a> <a class="link" href="accumulate.html#fusion.algorithm.iteration.metafunctions.accumulate.header">Header</a> </h6> <pre class="programlisting"><span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">fusion</span><span class="special">/</span><span class="identifier">algorithm</span><span class="special">/</span><span class="identifier">iteration</span><span class="special">/</span>accumulate<span class="special">.</span><span class="identifier">hpp</span><span class="special">></span> <span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">fusion</span><span class="special">/</span><span class="identifier">include</span><span class="special">/</span>accumulate<span class="special">.</span><span class="identifier">hpp</span><span class="special">></span> </pre> </div> <table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> <td align="left"></td> <td align="right"><div class="copyright-footer">Copyright © 2001-2007 Joel de Guzman, Dan Marsden, Tobias Schwinger<p> Distributed under the Boost Software License, Version 1.0. (See accompanying 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>) </p> </div></td> </tr></table> <hr> <div class="spirit-nav"> <a accesskey="p" href="reverse_iter_fold.html"><img src="../../../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../metafunctions.html"><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="for_each.html"><img src="../../../../../../../../doc/src/images/next.png" alt="Next"></a> </div> </body> </html>