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Joel de Guzman
2008-07-08 02:43:21 +00:00
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doc/html/fusion/algorithm/iteration/metafunctions/fold.html
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@ -3,7 +3,7 @@
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>fold</title>
<link rel="stylesheet" href="../../../../../../../../doc/html/boostbook.css" type="text/css">
<meta name="generator" content="DocBook XSL Stylesheets V1.73.2">
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<link rel="start" href="../../../../index.html" title="Chapter<65>1.<2E>Fusion 2.0">
<link rel="up" href="../metafunctions.html" title="Metafunctions">
<link rel="prev" href="../metafunctions.html" title="Metafunctions">
@ -12,10 +12,10 @@
<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>
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<hr>
@ -24,18 +24,17 @@
</div>
<div class="section" lang="en">
<div class="titlepage"><div><div><h5 class="title">
<a name="fusion.algorithm.iteration.metafunctions.fold"></a><a class="link" href="fold.html" title="fold">fold</a>
</h5></div></div></div>
<a name="fusion.algorithm.iteration.metafunctions.fold"></a><a href="fold.html" title="fold">fold</a></h5></div></div></div>
<a name="fusion.algorithm.iteration.metafunctions.fold.description"></a><h6>
<a name="id2749599"></a>
<a class="link" href="fold.html#fusion.algorithm.iteration.metafunctions.fold.description">Description</a>
<a name="id584198"></a>
<a href="fold.html#fusion.algorithm.iteration.metafunctions.fold.description">Description</a>
</h6>
<p>
Returns the result type of <a class="link" href="../functions/fold.html" title="fold"><code class="computeroutput"><span class="identifier">fold</span></code></a>.
Returns the result type of <a href="../functions/fold.html" title="fold"><tt class="computeroutput"><span class="identifier">fold</span></tt></a>.
</p>
<a name="fusion.algorithm.iteration.metafunctions.fold.synopsis"></a><h6>
<a name="id2749642"></a>
<a class="link" href="fold.html#fusion.algorithm.iteration.metafunctions.fold.synopsis">Synopsis</a>
<a name="id584248"></a>
<a href="fold.html#fusion.algorithm.iteration.metafunctions.fold.synopsis">Synopsis</a>
</h6>
<pre class="programlisting">
<span class="keyword">template</span><span class="special">&lt;</span>
@ -48,8 +47,8 @@
<span class="special">};</span>
</pre>
<div class="table">
<a name="id2749763"></a><p class="title"><b>Table<EFBFBD>1.36.<2E>Parameters</b></p>
<div class="table-contents"><table class="table" summary="Parameters">
<a name="id584383"></a><p class="title"><b>Table<EFBFBD>1.36.<2E>Parameters</b></p>
<table class="table" summary="Parameters">
<colgroup>
<col>
<col>
@ -76,12 +75,13 @@
<tr>
<td>
<p>
<code class="computeroutput"><span class="identifier">Sequence</span></code>
<tt class="computeroutput"><span class="identifier">Sequence</span></tt>
</p>
</td>
<td>
<p>
A model of <a class="link" href="../../../sequence/concepts/forward_sequence.html" title="Forward Sequence">Forward
A model of <a href="../../../sequence/concepts/forward_sequence.html" title="Forward
Sequence">Forward
Sequence</a>
</p>
</td>
@ -94,7 +94,7 @@
<tr>
<td>
<p>
<code class="computeroutput"><span class="identifier">State</span></code>
<tt class="computeroutput"><span class="identifier">State</span></tt>
</p>
</td>
<td>
@ -104,21 +104,21 @@
</td>
<td>
<p>
The initial state for the first application of <code class="computeroutput"><span class="identifier">F</span></code>
The initial state for the first application of <tt class="computeroutput"><span class="identifier">F</span></tt>
</p>
</td>
</tr>
<tr>
<td>
<p>
<code class="computeroutput"><span class="identifier">F</span></code>
<tt class="computeroutput"><span class="identifier">F</span></tt>
</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">&lt;</span><span class="identifier">F</span><span class="special">(</span><span class="identifier">E</span><span class="special">,</span><span class="identifier">S</span><span class="special">)&gt;::</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">e</span><span class="special">,</span><span class="identifier">s</span><span class="special">)</span></code>
for each 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>, and current state <code class="computeroutput"><span class="identifier">s</span></code> of type <code class="computeroutput"><span class="identifier">S</span></code>
<tt class="computeroutput"><a href="http://www.boost.org/libs/utility/utility.htm#result_of" target="_top"><tt class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">result_of</span></tt></a><span class="special">&lt;</span><span class="identifier">F</span><span class="special">(</span><span class="identifier">E</span><span class="special">,</span><span class="identifier">S</span><span class="special">)&gt;::</span><span class="identifier">type</span></tt> is the return type of <tt class="computeroutput"><span class="identifier">f</span><span class="special">(</span><span class="identifier">e</span><span class="special">,</span><span class="identifier">s</span><span class="special">)</span></tt>
for each element <tt class="computeroutput"><span class="identifier">e</span></tt>
of type <tt class="computeroutput"><span class="identifier">E</span></tt> in <tt class="computeroutput"><span class="identifier">seq</span></tt>, and current state <tt class="computeroutput"><span class="identifier">s</span></tt> of type <tt class="computeroutput"><span class="identifier">S</span></tt>
</p>
</td>
<td>
@ -128,36 +128,36 @@
</td>
</tr>
</tbody>
</table></div>
</table>
</div>
<br class="table-break"><a name="fusion.algorithm.iteration.metafunctions.fold.expression_semantics"></a><h6>
<a name="id2750080"></a>
<a class="link" href="fold.html#fusion.algorithm.iteration.metafunctions.fold.expression_semantics">Expression
<a name="fusion.algorithm.iteration.metafunctions.fold.expression_semantics"></a><h6>
<a name="id584733"></a>
<a href="fold.html#fusion.algorithm.iteration.metafunctions.fold.expression_semantics">Expression
Semantics</a>
</h6>
<pre class="programlisting">
<a class="link" href="fold.html" title="fold"><code class="computeroutput"><span class="identifier">result_of</span><span class="special">::</span><span class="identifier">fold</span></code></a><span class="special">&lt;</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">&gt;::</span><span class="identifier">type</span>
<a href="fold.html" title="fold"><tt class="computeroutput"><span class="identifier">result_of</span><span class="special">::</span><span class="identifier">fold</span></tt></a><span class="special">&lt;</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">&gt;::</span><span class="identifier">type</span>
</pre>
<p>
<span class="bold"><strong>Return type</strong></span>: Any type
<span class="bold"><b>Return type</b></span>: Any type
</p>
<p>
<span class="bold"><strong>Semantics</strong></span>: Returns the result of applying
<code class="computeroutput"><span class="identifier">fold</span></code> 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>.
<span class="bold"><b>Semantics</b></span>: Returns the result of applying
<tt class="computeroutput"><span class="identifier">fold</span></tt> to a sequence of
type <tt class="computeroutput"><span class="identifier">Sequence</span></tt>, with an
initial state of type <tt class="computeroutput"><span class="identifier">State</span></tt>
and binary function object or function pointer of type <tt class="computeroutput"><span class="identifier">F</span></tt>.
</p>
<a name="fusion.algorithm.iteration.metafunctions.fold.complexity"></a><h6>
<a name="id2750237"></a>
<a class="link" href="fold.html#fusion.algorithm.iteration.metafunctions.fold.complexity">Complexity</a>
<a name="id584907"></a>
<a href="fold.html#fusion.algorithm.iteration.metafunctions.fold.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">&lt;</span><span class="identifier">Sequence</span><span class="special">&gt;::</span><span class="identifier">value</span></code> applications of <code class="computeroutput"><span class="identifier">F</span></code>.
Linear, exactly <tt class="computeroutput"><a href="../../../sequence/intrinsic/metafunctions/size.html" title="size"><tt class="computeroutput"><span class="identifier">result_of</span><span class="special">::</span><span class="identifier">size</span></tt></a><span class="special">&lt;</span><span class="identifier">Sequence</span><span class="special">&gt;::</span><span class="identifier">value</span></tt> applications of <tt class="computeroutput"><span class="identifier">F</span></tt>.
</p>
<a name="fusion.algorithm.iteration.metafunctions.fold.header"></a><h6>
<a name="id2750322"></a>
<a class="link" href="fold.html#fusion.algorithm.iteration.metafunctions.fold.header">Header</a>
<a name="id585003"></a>
<a href="fold.html#fusion.algorithm.iteration.metafunctions.fold.header">Header</a>
</h6>
<pre class="programlisting">
<span class="preprocessor">#include</span> <span class="special">&lt;</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><span class="identifier">fold</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span>