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14 <div class=
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15 <h1><a class=
"toc-backref" href=
"./iteration-algorithms.html#id1473">accumulate
</a></h1>
16 <div class=
"section" id=
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17 <h3><a class=
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</a></h3>
18 <pre class=
"literal-block">
24 struct
<a href=
"./accumulate.html" class=
"identifier">accumulate
</a>
26 typedef
<em>unspecified
</em> type;
30 <div class=
"section" id=
"id528">
31 <h3><a class=
"subsection-title" href=
"#description" name=
"description">Description
</a></h3>
32 <p>Returns the result of the successive application of binary
<tt class=
"literal"><span class=
"pre">ForwardOp
</span></tt> to the
33 result of the previous
<tt class=
"literal"><span class=
"pre">ForwardOp
</span></tt> invocation (
<tt class=
"literal"><span class=
"pre">State
</span></tt> if it's the first call)
34 and every element of the sequence in the range [
<tt class=
"literal"><span class=
"pre"><a href=
"./begin.html" class=
"identifier">begin
</a><Sequence
>::type
</span></tt>,
<tt class=
"literal"><span class=
"pre"><a href=
"./end.html" class=
"identifier">end
</a><Sequence
>::type
</span></tt>) in order.
35 [
<em>Note:
</em> <tt class=
"literal"><span class=
"pre"><a href=
"./accumulate.html" class=
"identifier">accumulate
</a></span></tt> is a synonym for
<a class=
"reference internal" href=
"./fold.html">fold
</a> —
<em>end note
</em>]
</p>
37 <div class=
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"id529">
38 <h3><a class=
"subsection-title" href=
"#header" name=
"header">Header
</a></h3>
39 <pre class=
"literal-block">
40 #include
<<a href=
"../../../../boost/mpl/accumulate.hpp" class=
"header">boost/mpl/accumulate.hpp
</a>>
43 <div class=
"section" id=
"id530">
44 <h3><a class=
"subsection-title" href=
"#parameters" name=
"parameters">Parameters
</a></h3>
45 <table border=
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51 <thead valign=
"bottom">
52 <tr><th class=
"head">Parameter
</th>
53 <th class=
"head">Requirement
</th>
54 <th class=
"head">Description
</th>
58 <tr><td><tt class=
"literal"><span class=
"pre">Sequence
</span></tt></td>
59 <td><a class=
"reference internal" href=
"./forward-sequence.html">Forward Sequence
</a></td>
60 <td>A sequence to iterate.
</td>
62 <tr><td><tt class=
"literal"><span class=
"pre">State
</span></tt></td>
64 <td>The initial state for the first
<tt class=
"literal"><span class=
"pre">ForwardOp
</span></tt>
67 <tr><td><tt class=
"literal"><span class=
"pre">ForwardOp
</span></tt></td>
68 <td>Binary
<a class=
"reference internal" href=
"./lambda-expression.html">Lambda Expression
</a></td>
69 <td>The operation to be executed on forward
75 <div class=
"section" id=
"id531">
76 <h3><a class=
"subsection-title" href=
"#expression-semantics" name=
"expression-semantics">Expression semantics
</a></h3>
77 <p>For any
<a class=
"reference internal" href=
"./forward-sequence.html">Forward Sequence
</a> <tt class=
"literal"><span class=
"pre">s
</span></tt>, binary
<a class=
"reference internal" href=
"./lambda-expression.html">Lambda Expression
</a> <tt class=
"literal"><span class=
"pre">op
</span></tt>, and arbitrary type
<tt class=
"literal"><span class=
"pre">state
</span></tt>:
</p>
78 <pre class=
"literal-block">
79 typedef
<a href=
"./accumulate.html" class=
"identifier">accumulate
</a><s,state,op
>::type t;
81 <table class=
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82 <col class=
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83 <col class=
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85 <tr class=
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"field-name">Return type:
</th><td class=
"field-body"><p class=
"first">A type.
</p>
88 <tr class=
"field"><th class=
"field-name">Semantics:
</th><td class=
"field-body"><p class=
"first">Equivalent to
</p>
89 <pre class=
"last literal-block">
90 typedef
<a href=
"./fold.html" class=
"identifier">fold
</a><s,state,op
>::type t;
97 <div class=
"section" id=
"id532">
98 <h3><a class=
"subsection-title" href=
"#complexity" name=
"complexity">Complexity
</a></h3>
99 <p>Linear. Exactly
<tt class=
"literal"><span class=
"pre"><a href=
"./size.html" class=
"identifier">size
</a><s
>::value
</span></tt> applications of
<tt class=
"literal"><span class=
"pre">op
</span></tt>.
</p>
101 <div class=
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102 <h3><a class=
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"example">Example
</a></h3>
103 <pre class=
"literal-block">
104 typedef
<a href=
"./vector.html" class=
"identifier">vector
</a><long,float,short,double,float,long,long double
> types;
105 typedef
<a href=
"./accumulate.html" class=
"identifier">accumulate
</a><
107 ,
<a href=
"./int.html" class=
"identifier">int_
</a><0>
108 ,
<a href=
"./if.html" class=
"identifier">if_
</a>< is_float
<<a href=
"./placeholders.html" class=
"identifier">_2
</a>>,
<a href=
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"identifier">next
</a><<a href=
"./placeholders.html" class=
"identifier">_1
</a>>,
<a href=
"./placeholders.html" class=
"identifier">_1
</a> >
109 >::type number_of_floats;
111 <a href=
"./assert-relation.html" class=
"identifier">BOOST_MPL_ASSERT_RELATION
</a>( number_of_floats::value, ==,
4 );
114 <div class=
"section" id=
"id534">
115 <h3><a class=
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"#see-also" name=
"see-also">See also
</a></h3>
116 <p><a class=
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"./algorithms.html">Algorithms
</a>,
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"./fold.html">fold
</a>,
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</a>,
<a class=
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</a>,
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</a>,
<a class=
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123 Distributed under the Boost Software License, Version
1.0. (See accompanying
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