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7 <title>The MPL Reference Manual: reverse_partition
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14 <div class=
"section" id=
"reverse-partition">
15 <h1><a class=
"toc-backref" href=
"./transformation-algorithms.html#id1506">reverse_partition
</a></h1>
16 <div class=
"section" id=
"id794">
17 <h3><a class=
"subsection-title" href=
"#synopsis" name=
"synopsis">Synopsis
</a></h3>
18 <pre class=
"literal-block">
22 , typename In1 =
<em>unspecified
</em>
23 , typename In2 =
<em>unspecified
</em>
25 struct
<a href=
"./reverse-partition.html" class=
"identifier">reverse_partition
</a>
27 typedef
<em>unspecified
</em> type;
31 <div class=
"section" id=
"id795">
32 <h3><a class=
"subsection-title" href=
"#description" name=
"description">Description
</a></h3>
33 <p>Returns a pair of sequences together containing all elements in the range
34 [
<tt class=
"literal"><span class=
"pre"><a href=
"./begin.html" class=
"identifier">begin
</a><Seq
>::type
</span></tt>,
<tt class=
"literal"><span class=
"pre"><a href=
"./end.html" class=
"identifier">end
</a><Seq
>::type
</span></tt>) split into two groups based on the predicate
<tt class=
"literal"><span class=
"pre">Pred
</span></tt>.
35 <tt class=
"literal"><span class=
"pre"><a href=
"./reverse-partition.html" class=
"identifier">reverse_partition
</a></span></tt> is a synonym for
<a class=
"reference internal" href=
"./reverse-stable-partition.html">reverse_stable_partition
</a>.
</p>
36 <p>[
<em>Note:
</em> This wording applies to a no-inserter version(s) of the algorithm. See the
37 <cite>Expression semantics
</cite> subsection for a precise specification of the algorithm's
38 details in all cases —
<em>end note
</em>]
</p>
40 <div class=
"section" id=
"id796">
41 <h3><a class=
"subsection-title" href=
"#header" name=
"header">Header
</a></h3>
42 <pre class=
"literal-block">
43 #include
<<a href=
"../../../../boost/mpl/partition.hpp" class=
"header">boost/mpl/partition.hpp
</a>>
46 <div class=
"section" id=
"id797">
47 <h3><a class=
"subsection-title" href=
"#model-of" name=
"model-of">Model of
</a></h3>
48 <p><a class=
"reference internal" href=
"./reversible-algorithm.html">Reversible Algorithm
</a></p>
50 <div class=
"section" id=
"id798">
51 <h3><a class=
"subsection-title" href=
"#parameters" name=
"parameters">Parameters
</a></h3>
52 <table border=
"1" class=
"docutils table">
58 <thead valign=
"bottom">
59 <tr><th class=
"head">Parameter
</th>
60 <th class=
"head">Requirement
</th>
61 <th class=
"head">Description
</th>
65 <tr><td><tt class=
"literal"><span class=
"pre">Seq
</span></tt></td>
66 <td><a class=
"reference internal" href=
"./forward-sequence.html">Forward Sequence
</a></td>
67 <td>An original sequence.
</td>
69 <tr><td><tt class=
"literal"><span class=
"pre">Pred
</span></tt></td>
70 <td>Unary
<a class=
"reference internal" href=
"./lambda-expression.html">Lambda Expression
</a></td>
71 <td>A partitioning predicate.
</td>
73 <tr><td><tt class=
"literal"><span class=
"pre">In1
</span></tt>,
<tt class=
"literal"><span class=
"pre">In2
</span></tt></td>
74 <td><a class=
"reference internal" href=
"./inserter.html">Inserter
</a></td>
75 <td>Output inserters.
</td>
80 <div class=
"section" id=
"id799">
81 <h3><a class=
"subsection-title" href=
"#expression-semantics" name=
"expression-semantics">Expression semantics
</a></h3>
82 <p>The semantics of an expression are defined only
83 where they differ from, or are not defined in
<a class=
"reference internal" href=
"./reversible-algorithm.html">Reversible Algorithm
</a>.
</p>
84 <p>For any
<a class=
"reference internal" href=
"./forward-sequence.html">Forward Sequence
</a> <tt class=
"literal"><span class=
"pre">s
</span></tt>, an unary
<a class=
"reference internal" href=
"./lambda-expression.html">Lambda Expression
</a> <tt class=
"literal"><span class=
"pre">pred
</span></tt>, and
<a class=
"reference internal" href=
"./inserter.html">Inserter
</a>s
85 <tt class=
"literal"><span class=
"pre">in1
</span></tt> and
<tt class=
"literal"><span class=
"pre">in2
</span></tt>:
</p>
86 <pre class=
"literal-block">
87 typedef
<a href=
"./reverse-partition.html" class=
"identifier">reverse_partition
</a><s,pred,in1,in2
>::type r;
89 <table class=
"docutils field-list" frame=
"void" rules=
"none">
90 <col class=
"field-name" />
91 <col class=
"field-body" />
93 <tr class=
"field"><th class=
"field-name">Return type:
</th><td class=
"field-body"><p class=
"first">A
<a class=
"reference internal" href=
"./pair.html">pair
</a>.
</p>
96 <tr class=
"field"><th class=
"field-name">Semantics:
</th><td class=
"field-body"><p class=
"first">Equivalent to
</p>
97 <pre class=
"last literal-block">
98 typedef
<a href=
"./reverse-stable-partition.html" class=
"identifier">reverse_stable_partition
</a><s,pred,in1,in2
>::type r;
105 <div class=
"section" id=
"id800">
106 <h3><a class=
"subsection-title" href=
"#complexity" name=
"complexity">Complexity
</a></h3>
107 <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">pred
</span></tt>, and
<tt class=
"literal"><span class=
"pre"><a href=
"./size.html" class=
"identifier">size
</a><s
>::value
</span></tt>
108 of summarized
<tt class=
"literal"><span class=
"pre">in1::operation
</span></tt> /
<tt class=
"literal"><span class=
"pre">in2::operation
</span></tt> applications.
</p>
110 <div class=
"section" id=
"id801">
111 <h3><a class=
"subsection-title" href=
"#example" name=
"example">Example
</a></h3>
112 <pre class=
"literal-block">
113 template
< typename N
> struct is_odd :
<a href=
"./bool.html" class=
"identifier">bool_
</a><(N::value %
2)
> {};
115 typedef
<a href=
"./partition.html" class=
"identifier">partition
</a><
116 <a href=
"./range-c.html" class=
"identifier">range_c
</a><int,
0,
10>
117 , is_odd
<<a href=
"./placeholders.html" class=
"identifier">_1
</a>>
118 ,
<a href=
"./back-inserter.html" class=
"identifier">back_inserter
</a>< <a href=
"./vector.html" class=
"identifier">vector
</a><> >
119 ,
<a href=
"./back-inserter.html" class=
"identifier">back_inserter
</a>< <a href=
"./vector.html" class=
"identifier">vector
</a><> >
122 <a href=
"./assert.html" class=
"identifier">BOOST_MPL_ASSERT
</a>((
<a href=
"./equal.html" class=
"identifier">equal
</a>< r::first,
<a href=
"./vector-c.html" class=
"identifier">vector_c
</a><int,
9,
7,
5,
3,
1> > ));
123 <a href=
"./assert.html" class=
"identifier">BOOST_MPL_ASSERT
</a>((
<a href=
"./equal.html" class=
"identifier">equal
</a>< r::second,
<a href=
"./vector-c.html" class=
"identifier">vector_c
</a><int,
8,
6,
4,
2,
0> > ));
126 <div class=
"section" id=
"id802">
127 <h3><a class=
"subsection-title" href=
"#see-also" name=
"see-also">See also
</a></h3>
128 <p><a class=
"reference internal" href=
"./transformation-algorithms.html">Transformation Algorithms
</a>,
<a class=
"reference internal" href=
"./reversible-algorithm.html">Reversible Algorithm
</a>,
<a class=
"reference internal" href=
"./partition.html">partition
</a>,
<a class=
"reference internal" href=
"./reverse-stable-partition.html">reverse_stable_partition
</a>,
<a class=
"reference internal" href=
"./sort.html">sort
</a></p>
129 <!-- Algorithms/Transformation Algorithms//reverse_stable_partition |190 -->
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135 <td><div class=
"copyright-footer"><div class=
"copyright">Copyright ©
2001-
2009 Aleksey Gurtovoy and David Abrahams
</div>
136 Distributed under the Boost Software License, Version
1.0. (See accompanying
137 file LICENSE_1_0.txt or copy at
<a class=
"reference external" href=
"http://www.boost.org/LICENSE_1_0.txt" target=
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