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added reverse_fold/iter_fold/reverse_iter_fold (2) (fixes #1623)

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[SVN r63083]
This commit is contained in:
Christopher Schmidt
2010-06-18 17:23:20 +00:00
parent ea89db72cb
commit 758178a2a8
272 changed files with 2233 additions and 2089 deletions
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268
doc/html/fusion/algorithm/iteration/functions/accumulate.html
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<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII">
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<div class="section">
<div class="titlepage"><div><div><h5 class="title">
<a name="fusion.algorithm.iteration.functions.accumulate"></a><a class="link" href="accumulate.html" title="accumulate">accumulate</a>
</h5></div></div></div>
<a name="fusion.algorithm.iteration.functions.accumulate.description"></a><h6>
<a name="id896832"></a>
<a class="link" href="accumulate.html#fusion.algorithm.iteration.functions.accumulate.description">Description</a>
</h6>
<p>
For a sequence <code class="computeroutput"><span class="identifier">seq</span></code>, initial
state <code class="computeroutput"><span class="identifier">initial_state</span></code>,
and binary function object or function pointer <code class="computeroutput"><span class="identifier">f</span></code>,
accumulate returns the result of the repeated application of binary
<code class="computeroutput"><span class="identifier">f</span></code> to the result of the
previous <code class="computeroutput"><span class="identifier">f</span></code> invocation
(<code class="computeroutput"><span class="identifier">inital_state</span></code> if it is
the first call) and each element of <code class="computeroutput"><span class="identifier">seq</span></code>.
</p>
<a name="fusion.algorithm.iteration.functions.accumulate.synopsis"></a><h6>
<a name="id896947"></a>
<a class="link" href="accumulate.html#fusion.algorithm.iteration.functions.accumulate.synopsis">Synopsis</a>
</h6>
<a name="fusion.algorithm.iteration.functions.accumulate.description"></a>
</p>
<h6>
<a name="id1008882"></a>
<a class="link" href="accumulate.html#fusion.algorithm.iteration.functions.accumulate.description">Description</a>
</h6>
<p>
</p>
<p>
For a sequence <code class="computeroutput"><span class="identifier">seq</span></code>,
initial state <code class="computeroutput"><span class="identifier">initial_state</span></code>,
and binary function object or function pointer <code class="computeroutput"><span class="identifier">f</span></code>,
<code class="literal">accumulate</code> returns the result of the repeated application
of binary <code class="computeroutput"><span class="identifier">f</span></code> to the
result of the previous <code class="computeroutput"><span class="identifier">f</span></code>
invocation (<code class="computeroutput"><span class="identifier">inital_state</span></code>
if it is the first call) and each element of <code class="computeroutput"><span class="identifier">seq</span></code>.
</p>
<p>
<a name="fusion.algorithm.iteration.functions.accumulate.synopsis"></a>
</p>
<h6>
<a name="id1008961"></a>
<a class="link" href="accumulate.html#fusion.algorithm.iteration.functions.accumulate.synopsis">Synopsis</a>
</h6>
<p>
</p>
<pre class="programlisting"><span class="keyword">template</span><span class="special">&lt;</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">&gt;</span>
<span class="keyword">typename</span> <a class="link" href="../metafunctions/accumulate.html" title="accumulate"><code class="computeroutput"><span class="identifier">result_of</span><span class="special">::</span><span class="identifier">accumulate</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> <span class="identifier">accumulate</span><span class="special">(</span>
<span class="identifier">Sequence</span><span class="special">&amp;</span> <span class="identifier">seq</span><span class="special">,</span> <span class="identifier">State</span> <span class="keyword">const</span><span class="special">&amp;</span> <span class="identifier">initial_state</span><span class="special">,</span> <span class="identifier">F</span> <span class="keyword">const</span><span class="special">&amp;</span> <span class="identifier">f</span><span class="special">);</span>
<span class="keyword">typename</span> <a class="link" href="../metafunctions/accumulate.html" title="accumulate"><code class="computeroutput"><span class="identifier">result_of</span><span class="special">::</span><span class="identifier">accumulate</span></code></a><span class="special">&lt;</span><span class="identifier">Sequence</span><span class="special">,</span> <span class="identifier">State</span> <span class="keyword">const</span><span class="special">,</span> <span class="identifier">F</span><span class="special">&gt;::</span><span class="identifier">type</span> accumulate<span class="special">(</span>
<span class="identifier">Sequence</span><span class="special">&amp;</span> <span class="identifier">seq</span><span class="special">,</span> <span class="identifier">State</span> <span class="keyword">const</span><span class="special">&amp;</span> <span class="identifier">initial_state</span><span class="special">,</span> <span class="identifier">F</span> <span class="identifier">f</span><span class="special">);</span>
<span class="keyword">template</span><span class="special">&lt;</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">&gt;</span>
<span class="keyword">typename</span> <a class="link" href="../metafunctions/accumulate.html" title="accumulate"><code class="computeroutput"><span class="identifier">result_of</span><span class="special">::</span><span class="identifier">accumulate</span></code></a><span class="special">&lt;</span><span class="identifier">Sequence</span> <span class="keyword">const</span><span class="special">,</span> <span class="identifier">State</span> <span class="keyword">const</span><span class="special">,</span> <span class="identifier">F</span><span class="special">&gt;::</span><span class="identifier">type</span> accumulate<span class="special">(</span>
<span class="identifier">Sequence</span> <span class="keyword">const</span><span class="special">&amp;</span> <span class="identifier">seq</span><span class="special">,</span> <span class="identifier">State</span> <span class="keyword">const</span><span class="special">&amp;</span> <span class="identifier">initial_state</span><span class="special">,</span> <span class="identifier">F</span> <span class="identifier">f</span><span class="special">);</span>
</pre>
<p>
</p>
<div class="table">
<a name="id897205"></a><p class="title"><b>Table&#160;1.38.&#160;Parameters</b></p>
<a name="id1009312"></a><p class="title"><b>Table&#160;1.41.&#160;Parameters</b></p>
<div class="table-contents"><table class="table" summary="Parameters">
<colgroup>
<col>
@ -62,117 +83,142 @@
</colgroup>
<thead><tr>
<th>
<p>
Parameter
</p>
</th>
<p>
Parameter
</p>
</th>
<th>
<p>
Requirement
</p>
</th>
<p>
Requirement
</p>
</th>
<th>
<p>
Description
</p>
</th>
<p>
Description
</p>
</th>
</tr></thead>
<tbody>
<tr>
<td>
<p>
<code class="computeroutput"><span class="identifier">seq</span></code>
</p>
</td>
<p>
<code class="computeroutput"><span class="identifier">seq</span></code>
</p>
</td>
<td>
<p>
A model of <a class="link" href="../../../sequence/concepts/forward_sequence.html" title="Forward Sequence">Forward
Sequence</a>, <code class="computeroutput"><span class="identifier">f</span><span class="special">(</span><span class="identifier">s</span><span class="special">,</span><span class="identifier">e</span><span class="special">)</span></code> must be a valid expression
for current state <code class="computeroutput"><span class="identifier">s</span></code>,
and each element <code class="computeroutput"><span class="identifier">e</span></code>
in <code class="computeroutput"><span class="identifier">seq</span></code>
</p>
</td>
<p>
A model of <a class="link" href="../../../sequence/concepts/forward_sequence.html" title="Forward Sequence">Forward
Sequence</a>
</p>
</td>
<td>
<p>
Operation's argument
</p>
</td>
<p>
Operation's argument
</p>
</td>
</tr>
<tr>
<td>
<p>
<code class="computeroutput"><span class="identifier">initial_state</span></code>
</p>
</td>
<p>
<code class="computeroutput"><span class="identifier">initial_state</span></code>
</p>
</td>
<td>
<p>
Any type
</p>
</td>
<p>
Any type
</p>
</td>
<td>
<p>
Initial state
</p>
</td>
<p>
Initial state
</p>
</td>
</tr>
<tr>
<td>
<p>
<code class="computeroutput"><span class="identifier">f</span></code>
</p>
</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">&lt;</span><span class="identifier">F</span><span class="special">(</span><span class="identifier">S</span><span class="special">,</span><span class="identifier">E</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">s</span><span class="special">,</span><span class="identifier">e</span><span class="special">)</span></code> current state <code class="computeroutput"><span class="identifier">s</span></code> of type <code class="computeroutput"><span class="identifier">S</span></code>,
and 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>
</p>
</td>
<p>
<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 return type <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">S</span><span class="special">,</span>E<span class="special">)&gt;::</span><span class="identifier">type</span></code> must be a valid expression
for current state <code class="computeroutput"><span class="identifier">s</span></code>
of type <code class="computeroutput"><span class="identifier">S</span></code>,
and 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>
</p>
</td>
<td>
<p>
Operation's argument
</p>
</td>
<p>
Operation's argument
</p>
</td>
</tr>
</tbody>
</table></div>
</div>
<br class="table-break"><a name="fusion.algorithm.iteration.functions.accumulate.expression_semantics"></a><h6>
<a name="id897626"></a>
<a class="link" href="accumulate.html#fusion.algorithm.iteration.functions.accumulate.expression_semantics">Expression
Semantics</a>
</h6>
<pre class="programlisting"><span class="identifier">accumulate</span><span class="special">(</span><span class="identifier">seq</span><span class="special">,</span> <span class="identifier">initial_state</span><span class="special">,</span> <span class="identifier">f</span><span class="special">);</span>
<p><br class="table-break">
<a name="fusion.algorithm.iteration.functions.accumulate.expression_semantics"></a>
</p>
<h6>
<a name="id1009575"></a>
<a class="link" href="accumulate.html#fusion.algorithm.iteration.functions.accumulate.expression_semantics">Expression
Semantics</a>
</h6>
<p>
</p>
<pre class="programlisting">accumulate<span class="special">(</span><span class="identifier">seq</span><span class="special">,</span> <span class="identifier">initial_state</span><span class="special">,</span> <span class="identifier">f</span><span class="special">);</span>
</pre>
<p>
<span class="bold"><strong>Return type</strong></span>: Any type
</p>
</p>
<p>
<span class="bold"><strong>Semantics</strong></span>: Equivalent to <code class="computeroutput"><span class="identifier">f</span><span class="special">(...</span> <span class="identifier">f</span><span class="special">(</span><span class="identifier">f</span><span class="special">(</span><span class="identifier">initial_state</span><span class="special">,</span><span class="identifier">e1</span><span class="special">),</span><span class="identifier">e2</span><span class="special">)</span> <span class="special">...</span><span class="identifier">eN</span><span class="special">)</span></code> where <code class="computeroutput"><span class="identifier">e1</span>
<span class="special">...</span><span class="identifier">eN</span></code>
are the elements of <code class="computeroutput"><span class="identifier">seq</span></code>.
</p>
<a name="fusion.algorithm.iteration.functions.accumulate.complexity"></a><h6>
<a name="id897839"></a>
<a class="link" href="accumulate.html#fusion.algorithm.iteration.functions.accumulate.complexity">Complexity</a>
</h6>
<span class="bold"><strong>Return type</strong></span>: Any type
</p>
<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>.
</p>
<a name="fusion.algorithm.iteration.functions.accumulate.header"></a><h6>
<a name="id897932"></a>
<a class="link" href="accumulate.html#fusion.algorithm.iteration.functions.accumulate.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">accumulate</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span>
<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">include</span><span class="special">/</span><span class="identifier">accumulate</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span>
</p>
<p>
<span class="bold"><strong>Semantics</strong></span>: Equivalent to <code class="literal">f(...
f(f(initial_state,e1),e2) ...eN)</code> where <code class="literal">e1 ...eN</code>
are the consecutive elements of <code class="computeroutput"><span class="identifier">seq</span></code>.
</p>
<p>
<a name="fusion.algorithm.iteration.functions.accumulate.complexity"></a>
</p>
<h6>
<a name="id1009657"></a>
<a class="link" href="accumulate.html#fusion.algorithm.iteration.functions.accumulate.complexity">Complexity</a>
</h6>
<p>
</p>
<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>.
</p>
<p>
<a name="fusion.algorithm.iteration.functions.accumulate.header"></a>
</p>
<h6>
<a name="id1009717"></a>
<a class="link" href="accumulate.html#fusion.algorithm.iteration.functions.accumulate.header">Header</a>
</h6>
<p>
</p>
<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>accumulate<span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span>
<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">include</span><span class="special">/</span>accumulate<span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span>
</pre>
<a name="fusion.algorithm.iteration.functions.accumulate.example"></a><h6>
<a name="id898098"></a>
<a class="link" href="accumulate.html#fusion.algorithm.iteration.functions.accumulate.example">Example</a>
</h6>
<p>
<a name="fusion.algorithm.iteration.functions.accumulate.example"></a>
</p>
<h6>
<a name="id1009828"></a>
<a class="link" href="accumulate.html#fusion.algorithm.iteration.functions.accumulate.example">Example</a>
</h6>
<p>
</p>
<pre class="programlisting"><span class="keyword">struct</span> <span class="identifier">make_string</span>
<span class="special">{</span>
<span class="keyword">typedef</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span> <span class="identifier">result_type</span><span class="special">;</span>
@ -180,13 +226,15 @@
<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> <span class="identifier">T</span><span class="special">&gt;</span>
<span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span> <span class="keyword">operator</span><span class="special">()(</span><span class="keyword">const</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span><span class="special">&amp;</span> <span class="identifier">str</span><span class="special">,</span> <span class="keyword">const</span> <span class="identifier">T</span><span class="special">&amp;</span> <span class="identifier">t</span><span class="special">)</span> <span class="keyword">const</span>
<span class="special">{</span>
<span class="keyword">return</span> <span class="identifier">str</span> <span class="special">+</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">lexical_cast</span><span class="special">&lt;</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span><span class="special">&gt;(</span><span class="identifier">t</span><span class="special">);</span>
<span class="keyword">return</span> <span class="identifier">str</span> <span class="special">+</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">lexical_cast</span><span class="special">&lt;</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span><span class="special">&gt;(</span>t<span class="special">);</span>
<span class="special">}</span>
<span class="special">};</span>
<span class="special">...</span>
<span class="keyword">const</span> <a class="link" href="../../../container/vector.html" title="vector"><code class="computeroutput"><span class="identifier">vector</span></code></a><span class="special">&lt;</span><span class="keyword">int</span><span class="special">,</span><span class="keyword">int</span><span class="special">&gt;</span> <span class="identifier">vec</span><span class="special">(</span><span class="number">1</span><span class="special">,</span><span class="number">2</span><span class="special">);</span>
<span class="identifier">assert</span><span class="special">(</span><a class="link" href="accumulate.html" title="accumulate"><code class="computeroutput"><span class="identifier">accumulate</span></code></a><span class="special">(</span><span class="identifier">vec</span><span class="special">,</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span><span class="special">(</span><span class="string">""</span><span class="special">),</span> <span class="identifier">make_string</span><span class="special">())</span> <span class="special">==</span> <span class="string">"12"</span><span class="special">);</span>
<span class="identifier">assert</span><span class="special">(</span>accumulate<span class="special">(</span><span class="identifier">vec</span><span class="special">,</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span><span class="special">(</span><span class="string">""</span><span class="special">),</span> <span class="identifier">make_string</span><span class="special">())</span> <span class="special">==</span> "12"<span class="special">);</span>
</pre>
<p>
</p>
</div>
<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
<td align="left"></td>
@ -199,7 +247,7 @@
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<div class="section">
<div class="titlepage"><div><div><h5 class="title">
<a name="fusion.algorithm.iteration.functions.fold"></a><a class="link" href="fold.html" title="fold">fold</a>
</h5></div></div></div>
<a name="fusion.algorithm.iteration.functions.fold.description"></a><h6>
<a name="id895073"></a>
<a class="link" href="fold.html#fusion.algorithm.iteration.functions.fold.description">Description</a>
</h6>
<p>
For a sequence <code class="computeroutput"><span class="identifier">seq</span></code>, initial
state <code class="computeroutput"><span class="identifier">initial_state</span></code>,
and binary function object or function pointer <code class="computeroutput"><span class="identifier">f</span></code>,
fold returns the result of the repeated application of binary <code class="computeroutput"><span class="identifier">f</span></code> to the result of the previous <code class="computeroutput"><span class="identifier">f</span></code> invocation (<code class="computeroutput"><span class="identifier">inital_state</span></code>
if it is the first call) and each element of <code class="computeroutput"><span class="identifier">seq</span></code>.
</p>
<a name="fusion.algorithm.iteration.functions.fold.synopsis"></a><h6>
<a name="id895186"></a>
<a class="link" href="fold.html#fusion.algorithm.iteration.functions.fold.synopsis">Synopsis</a>
</h6>
<a name="fusion.algorithm.iteration.functions.fold.description"></a>
</p>
<h6>
<a name="id1002024"></a>
<a class="link" href="fold.html#fusion.algorithm.iteration.functions.fold.description">Description</a>
</h6>
<p>
</p>
<p>
For a sequence <code class="computeroutput"><span class="identifier">seq</span></code>,
initial state <code class="computeroutput"><span class="identifier">initial_state</span></code>,
and binary function object or function pointer <code class="computeroutput"><span class="identifier">f</span></code>,
<code class="literal">fold</code> returns the result of the repeated application
of binary <code class="computeroutput"><span class="identifier">f</span></code> to the
result of the previous <code class="computeroutput"><span class="identifier">f</span></code>
invocation (<code class="computeroutput"><span class="identifier">inital_state</span></code>
if it is the first call) and each element of <code class="computeroutput"><span class="identifier">seq</span></code>.
</p>
<p>
<a name="fusion.algorithm.iteration.functions.fold.synopsis"></a>
</p>
<h6>
<a name="id1002098"></a>
<a class="link" href="fold.html#fusion.algorithm.iteration.functions.fold.synopsis">Synopsis</a>
</h6>
<p>
</p>
<pre class="programlisting"><span class="keyword">template</span><span class="special">&lt;</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">&gt;</span>
<span class="keyword">typename</span> <a class="link" href="../metafunctions/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> <span class="identifier">fold</span><span class="special">(</span>
<span class="identifier">Sequence</span><span class="special">&amp;</span> <span class="identifier">seq</span><span class="special">,</span> <span class="identifier">State</span> <span class="keyword">const</span><span class="special">&amp;</span> <span class="identifier">initial_state</span><span class="special">,</span> <span class="identifier">F</span> <span class="keyword">const</span><span class="special">&amp;</span> <span class="identifier">f</span><span class="special">);</span>
<span class="keyword">typename</span> <a class="link" href="../metafunctions/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="keyword">const</span><span class="special">,</span> <span class="identifier">F</span><span class="special">&gt;::</span><span class="identifier">type</span> fold<span class="special">(</span>
<span class="identifier">Sequence</span><span class="special">&amp;</span> <span class="identifier">seq</span><span class="special">,</span> <span class="identifier">State</span> <span class="keyword">const</span><span class="special">&amp;</span> <span class="identifier">initial_state</span><span class="special">,</span> <span class="identifier">F</span> <span class="identifier">f</span><span class="special">);</span>
<span class="keyword">template</span><span class="special">&lt;</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">&gt;</span>
<span class="keyword">typename</span> <a class="link" href="../metafunctions/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="keyword">const</span><span class="special">,</span> <span class="identifier">State</span> <span class="keyword">const</span><span class="special">,</span> <span class="identifier">F</span><span class="special">&gt;::</span><span class="identifier">type</span> fold<span class="special">(</span>
<span class="identifier">Sequence</span> <span class="keyword">const</span><span class="special">&amp;</span> <span class="identifier">seq</span><span class="special">,</span> <span class="identifier">State</span> <span class="keyword">const</span><span class="special">&amp;</span> <span class="identifier">initial_state</span><span class="special">,</span> <span class="identifier">F</span> <span class="identifier">f</span><span class="special">);</span>
</pre>
<p>
</p>
<div class="table">
<a name="id895441"></a><p class="title"><b>Table&#160;1.37.&#160;Parameters</b></p>
<a name="id1002447"></a><p class="title"><b>Table&#160;1.37.&#160;Parameters</b></p>
<div class="table-contents"><table class="table" summary="Parameters">
<colgroup>
<col>
@ -59,117 +83,142 @@
</colgroup>
<thead><tr>
<th>
<p>
Parameter
</p>
</th>
<p>
Parameter
</p>
</th>
<th>
<p>
Requirement
</p>
</th>
<p>
Requirement
</p>
</th>
<th>
<p>
Description
</p>
</th>
<p>
Description
</p>
</th>
</tr></thead>
<tbody>
<tr>
<td>
<p>
<code class="computeroutput"><span class="identifier">seq</span></code>
</p>
</td>
<p>
<code class="computeroutput"><span class="identifier">seq</span></code>
</p>
</td>
<td>
<p>
A model of <a class="link" href="../../../sequence/concepts/forward_sequence.html" title="Forward Sequence">Forward
Sequence</a>, <code class="computeroutput"><span class="identifier">f</span><span class="special">(</span><span class="identifier">s</span><span class="special">,</span><span class="identifier">e</span><span class="special">)</span></code> must be a valid expression
for current state <code class="computeroutput"><span class="identifier">s</span></code>,
and each element <code class="computeroutput"><span class="identifier">e</span></code>
in <code class="computeroutput"><span class="identifier">seq</span></code>
</p>
</td>
<p>
A model of <a class="link" href="../../../sequence/concepts/forward_sequence.html" title="Forward Sequence">Forward
Sequence</a>
</p>
</td>
<td>
<p>
Operation's argument
</p>
</td>
<p>
Operation's argument
</p>
</td>
</tr>
<tr>
<td>
<p>
<code class="computeroutput"><span class="identifier">initial_state</span></code>
</p>
</td>
<p>
<code class="computeroutput"><span class="identifier">initial_state</span></code>
</p>
</td>
<td>
<p>
Any type
</p>
</td>
<p>
Any type
</p>
</td>
<td>
<p>
Initial state
</p>
</td>
<p>
Initial state
</p>
</td>
</tr>
<tr>
<td>
<p>
<code class="computeroutput"><span class="identifier">f</span></code>
</p>
</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">&lt;</span><span class="identifier">F</span><span class="special">(</span><span class="identifier">S</span><span class="special">,</span><span class="identifier">E</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">s</span><span class="special">,</span><span class="identifier">e</span><span class="special">)</span></code> current state <code class="computeroutput"><span class="identifier">s</span></code> of type <code class="computeroutput"><span class="identifier">S</span></code>,
and 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>
</p>
</td>
<p>
<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 return type <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">S</span><span class="special">,</span>E<span class="special">)&gt;::</span><span class="identifier">type</span></code> must be a valid expression
for current state <code class="computeroutput"><span class="identifier">s</span></code>
of type <code class="computeroutput"><span class="identifier">S</span></code>,
and 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>
</p>
</td>
<td>
<p>
Operation's argument
</p>
</td>
<p>
Operation's argument
</p>
</td>
</tr>
</tbody>
</table></div>
</div>
<br class="table-break"><a name="fusion.algorithm.iteration.functions.fold.expression_semantics"></a><h6>
<a name="id895861"></a>
<a class="link" href="fold.html#fusion.algorithm.iteration.functions.fold.expression_semantics">Expression
Semantics</a>
</h6>
<pre class="programlisting"><span class="identifier">fold</span><span class="special">(</span><span class="identifier">seq</span><span class="special">,</span> <span class="identifier">initial_state</span><span class="special">,</span> <span class="identifier">f</span><span class="special">);</span>
<p><br class="table-break">
<a name="fusion.algorithm.iteration.functions.fold.expression_semantics"></a>
</p>
<h6>
<a name="id1002711"></a>
<a class="link" href="fold.html#fusion.algorithm.iteration.functions.fold.expression_semantics">Expression
Semantics</a>
</h6>
<p>
</p>
<pre class="programlisting">fold<span class="special">(</span><span class="identifier">seq</span><span class="special">,</span> <span class="identifier">initial_state</span><span class="special">,</span> <span class="identifier">f</span><span class="special">);</span>
</pre>
<p>
<span class="bold"><strong>Return type</strong></span>: Any type
</p>
</p>
<p>
<span class="bold"><strong>Semantics</strong></span>: Equivalent to <code class="computeroutput"><span class="identifier">f</span><span class="special">(...</span> <span class="identifier">f</span><span class="special">(</span><span class="identifier">f</span><span class="special">(</span><span class="identifier">initial_state</span><span class="special">,</span><span class="identifier">e1</span><span class="special">),</span><span class="identifier">e2</span><span class="special">)</span> <span class="special">...</span><span class="identifier">eN</span><span class="special">)</span></code> where <code class="computeroutput"><span class="identifier">e1</span>
<span class="special">...</span><span class="identifier">eN</span></code>
are the elements of <code class="computeroutput"><span class="identifier">seq</span></code>.
</p>
<a name="fusion.algorithm.iteration.functions.fold.complexity"></a><h6>
<a name="id896074"></a>
<a class="link" href="fold.html#fusion.algorithm.iteration.functions.fold.complexity">Complexity</a>
</h6>
<span class="bold"><strong>Return type</strong></span>: Any type
</p>
<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>.
</p>
<a name="fusion.algorithm.iteration.functions.fold.header"></a><h6>
<a name="id896167"></a>
<a class="link" href="fold.html#fusion.algorithm.iteration.functions.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>
<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">include</span><span class="special">/</span><span class="identifier">fold</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span>
</p>
<p>
<span class="bold"><strong>Semantics</strong></span>: Equivalent to <code class="literal">f(...
f(f(initial_state,e1),e2) ...eN)</code> where <code class="literal">e1 ...eN</code>
are the consecutive elements of <code class="computeroutput"><span class="identifier">seq</span></code>.
</p>
<p>
<a name="fusion.algorithm.iteration.functions.fold.complexity"></a>
</p>
<h6>
<a name="id1002794"></a>
<a class="link" href="fold.html#fusion.algorithm.iteration.functions.fold.complexity">Complexity</a>
</h6>
<p>
</p>
<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>.
</p>
<p>
<a name="fusion.algorithm.iteration.functions.fold.header"></a>
</p>
<h6>
<a name="id1002852"></a>
<a class="link" href="fold.html#fusion.algorithm.iteration.functions.fold.header">Header</a>
</h6>
<p>
</p>
<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>fold<span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span>
<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">include</span><span class="special">/</span>fold<span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span>
</pre>
<a name="fusion.algorithm.iteration.functions.fold.example"></a><h6>
<a name="id896333"></a>
<a class="link" href="fold.html#fusion.algorithm.iteration.functions.fold.example">Example</a>
</h6>
<p>
<a name="fusion.algorithm.iteration.functions.fold.example"></a>
</p>
<h6>
<a name="id1002962"></a>
<a class="link" href="fold.html#fusion.algorithm.iteration.functions.fold.example">Example</a>
</h6>
<p>
</p>
<pre class="programlisting"><span class="keyword">struct</span> <span class="identifier">make_string</span>
<span class="special">{</span>
<span class="keyword">typedef</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span> <span class="identifier">result_type</span><span class="special">;</span>
@ -177,13 +226,15 @@
<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> <span class="identifier">T</span><span class="special">&gt;</span>
<span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span> <span class="keyword">operator</span><span class="special">()(</span><span class="keyword">const</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span><span class="special">&amp;</span> <span class="identifier">str</span><span class="special">,</span> <span class="keyword">const</span> <span class="identifier">T</span><span class="special">&amp;</span> <span class="identifier">t</span><span class="special">)</span> <span class="keyword">const</span>
<span class="special">{</span>
<span class="keyword">return</span> <span class="identifier">str</span> <span class="special">+</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">lexical_cast</span><span class="special">&lt;</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span><span class="special">&gt;(</span><span class="identifier">t</span><span class="special">);</span>
<span class="keyword">return</span> <span class="identifier">str</span> <span class="special">+</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">lexical_cast</span><span class="special">&lt;</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span><span class="special">&gt;(</span>t<span class="special">);</span>
<span class="special">}</span>
<span class="special">};</span>
<span class="special">...</span>
<span class="keyword">const</span> <a class="link" href="../../../container/vector.html" title="vector"><code class="computeroutput"><span class="identifier">vector</span></code></a><span class="special">&lt;</span><span class="keyword">int</span><span class="special">,</span><span class="keyword">int</span><span class="special">&gt;</span> <span class="identifier">vec</span><span class="special">(</span><span class="number">1</span><span class="special">,</span><span class="number">2</span><span class="special">);</span>
<span class="identifier">assert</span><span class="special">(</span><a class="link" href="fold.html" title="fold"><code class="computeroutput"><span class="identifier">fold</span></code></a><span class="special">(</span><span class="identifier">vec</span><span class="special">,</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span><span class="special">(</span><span class="string">""</span><span class="special">),</span> <span class="identifier">make_string</span><span class="special">())</span> <span class="special">==</span> <span class="string">"12"</span><span class="special">);</span>
<span class="identifier">assert</span><span class="special">(</span>fold<span class="special">(</span><span class="identifier">vec</span><span class="special">,</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span><span class="special">(</span><span class="string">""</span><span class="special">),</span> <span class="identifier">make_string</span><span class="special">())</span> <span class="special">==</span> "12"<span class="special">);</span>
</pre>
<p>
</p>
</div>
<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
<td align="left"></td>
@ -196,7 +247,7 @@
</tr></table>
<hr>
<div class="spirit-nav">
<a accesskey="p" href="../functions.html"><img src="../../../../../../../../doc/html/images/prev.png" alt="Prev"></a><a accesskey="u" href="../functions.html"><img src="../../../../../../../../doc/html/images/up.png" alt="Up"></a><a accesskey="h" href="../../../../index.html"><img src="../../../../../../../../doc/html/images/home.png" alt="Home"></a><a accesskey="n" href="accumulate.html"><img src="../../../../../../../../doc/html/images/next.png" alt="Next"></a>
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18
doc/html/fusion/algorithm/iteration/functions/for_each.html
View File

@ -3,7 +3,7 @@
<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII">
<title>for_each</title>
<link rel="stylesheet" href="../../../../../../../../doc/html/boostbook.css" type="text/css">
<meta name="generator" content="DocBook XSL Stylesheets V1.76.0-pre">
<meta name="generator" content="DocBook XSL Stylesheets V1.75.1">
<link rel="home" href="../../../../index.html" title="Chapter&#160;1.&#160;Fusion 2.0">
<link rel="up" href="../functions.html" title="Functions">
<link rel="prev" href="accumulate.html" title="accumulate">
@ -27,14 +27,14 @@
<a name="fusion.algorithm.iteration.functions.for_each"></a><a class="link" href="for_each.html" title="for_each">for_each</a>
</h5></div></div></div>
<a name="fusion.algorithm.iteration.functions.for_each.description"></a><h6>
<a name="id898595"></a>
<a name="id1010177"></a>
<a class="link" href="for_each.html#fusion.algorithm.iteration.functions.for_each.description">Description</a>
</h6>
<p>
Applies a unary function object to each element of a sequence.
</p>
<a name="fusion.algorithm.iteration.functions.for_each.synopsis"></a><h6>
<a name="id898623"></a>
<a name="id1010196"></a>
<a class="link" href="for_each.html#fusion.algorithm.iteration.functions.for_each.synopsis">Synopsis</a>
</h6>
<pre class="programlisting"><span class="keyword">template</span><span class="special">&lt;</span>
@ -42,10 +42,10 @@
<span class="keyword">typename</span> <span class="identifier">F</span>
<span class="special">&gt;</span>
<span class="keyword">typename</span> <a class="link" href="../metafunctions/for_each.html" title="for_each"><code class="computeroutput"><span class="identifier">result_of</span><span class="special">::</span><span class="identifier">for_each</span></code></a><span class="special">&lt;</span><span class="identifier">Sequence</span><span class="special">,</span> <span class="identifier">F</span><span class="special">&gt;::</span><span class="identifier">type</span> <span class="identifier">for_each</span><span class="special">(</span>
<span class="identifier">Sequence</span><span class="special">&amp;</span> <span class="identifier">seq</span><span class="special">,</span> <span class="identifier">F</span> <span class="keyword">const</span><span class="special">&amp;</span> <span class="identifier">f</span><span class="special">);</span>
<span class="identifier">Sequence</span><span class="special">&amp;</span> <span class="identifier">seq</span><span class="special">,</span> <span class="identifier">F</span> <span class="identifier">f</span><span class="special">);</span>
</pre>
<div class="table">
<a name="id898822"></a><p class="title"><b>Table&#160;1.39.&#160;Parameters</b></p>
<a name="id1010328"></a><p class="title"><b>Table&#160;1.42.&#160;Parameters</b></p>
<div class="table-contents"><table class="table" summary="Parameters">
<colgroup>
<col>
@ -112,7 +112,7 @@
</table></div>
</div>
<br class="table-break"><a name="fusion.algorithm.iteration.functions.for_each.expression_semantics"></a><h6>
<a name="id899029"></a>
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<a class="link" href="for_each.html#fusion.algorithm.iteration.functions.for_each.expression_semantics">Expression
Semantics</a>
</h6>
@ -126,21 +126,21 @@
in <code class="computeroutput"><span class="identifier">seq</span></code>.
</p>
<a name="fusion.algorithm.iteration.functions.for_each.complexity"></a><h6>
<a name="id899183"></a>
<a name="id1010589"></a>
<a class="link" href="for_each.html#fusion.algorithm.iteration.functions.for_each.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>.
</p>
<a name="fusion.algorithm.iteration.functions.for_each.header"></a><h6>
<a name="id899277"></a>
<a name="id1010649"></a>
<a class="link" href="for_each.html#fusion.algorithm.iteration.functions.for_each.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">for_each</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span>
<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">include</span><span class="special">/</span><span class="identifier">for_each</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span>
</pre>
<a name="fusion.algorithm.iteration.functions.for_each.example"></a><h6>
<a name="id899444"></a>
<a name="id1010764"></a>
<a class="link" href="for_each.html#fusion.algorithm.iteration.functions.for_each.example">Example</a>
</h6>
<pre class="programlisting"><span class="keyword">struct</span> <span class="identifier">increment</span>