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7 <title>The MPL Reference Manual: zip_view
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13 </tr></table><div class=
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14 <div class=
"section" id=
"zip-view">
15 <h1><a class=
"toc-backref" href=
"./views.html#id1423">zip_view
</a></h1>
16 <div class=
"section" id=
"id167">
17 <h3><a class=
"subsection-title" href=
"#synopsis" name=
"synopsis">Synopsis
</a></h3>
18 <pre class=
"literal-block">
20 typename
<a href=
"./sequences.html" class=
"identifier">Sequences
</a>
22 struct
<a href=
"./zip-view.html" class=
"identifier">zip_view
</a>
24 //
<em>unspecified
</em>
29 <div class=
"section" id=
"id168">
30 <h3><a class=
"subsection-title" href=
"#description" name=
"description">Description
</a></h3>
31 <p>Provides a
"zipped
" view onto several sequences; that is, represents several
32 sequences as a single sequence of elements each of which, in turn,
33 is a sequence of the corresponding
<tt class=
"literal"><span class=
"pre"><a href=
"./sequences.html" class=
"identifier">Sequences
</a></span></tt>' elements.
</p>
35 <div class=
"section" id=
"id169">
36 <h3><a class=
"subsection-title" href=
"#header" name=
"header">Header
</a></h3>
37 <pre class=
"literal-block">
38 #include
<<a href=
"../../../../boost/mpl/zip_view.hpp" class=
"header">boost/mpl/zip_view.hpp
</a>>
41 <div class=
"section" id=
"id170">
42 <h3><a class=
"subsection-title" href=
"#model-of" name=
"model-of">Model of
</a></h3>
44 <li><a class=
"reference internal" href=
"./forward-sequence.html">Forward Sequence
</a></li>
47 <div class=
"section" id=
"id171">
48 <h3><a class=
"subsection-title" href=
"#parameters" name=
"parameters">Parameters
</a></h3>
49 <table border=
"1" class=
"docutils table">
55 <thead valign=
"bottom">
56 <tr><th class=
"head">Parameter
</th>
57 <th class=
"head">Requirement
</th>
58 <th class=
"head">Description
</th>
62 <tr><td><tt class=
"literal"><span class=
"pre"><a href=
"./sequences.html" class=
"identifier">Sequences
</a></span></tt></td>
63 <td>A
<a class=
"reference internal" href=
"./forward-sequence.html">Forward Sequence
</a> of
64 <a class=
"reference internal" href=
"./forward-sequence.html">Forward Sequence
</a>s
</td>
65 <td>Sequences to be
"zipped
".
</td>
70 <div class=
"section" id=
"id172">
71 <h3><a class=
"subsection-title" href=
"#expression-semantics" name=
"expression-semantics">Expression semantics
</a></h3>
72 <p>The semantics of an expression are defined only
73 where they differ from, or are not defined in
<a class=
"reference internal" href=
"./forward-sequence.html">Forward Sequence
</a>.
</p>
74 <p>In the following table,
<tt class=
"literal"><span class=
"pre">v
</span></tt> is an instance of
<tt class=
"literal"><span class=
"pre"><a href=
"./zip-view.html" class=
"identifier">zip_view
</a></span></tt>,
<tt class=
"literal"><span class=
"pre">seq
</span></tt> a
<a class=
"reference internal" href=
"./forward-sequence.html">Forward Sequence
</a> of
<tt class=
"literal"><span class=
"pre">n
</span></tt>
75 <a class=
"reference internal" href=
"./forward-sequence.html">Forward Sequence
</a>s.
</p>
76 <table border=
"1" class=
"docutils table">
81 <thead valign=
"bottom">
82 <tr><th class=
"head">Expression
</th>
83 <th class=
"head">Semantics
</th>
87 <tr><td><pre class=
"first last literal-block">
88 <a href=
"./zip-view.html" class=
"identifier">zip_view
</a><seq
>
89 <a href=
"./zip-view.html" class=
"identifier">zip_view
</a><seq
>::type
92 <td>A lazy
<a class=
"reference internal" href=
"./forward-sequence.html">Forward Sequence
</a> <tt class=
"literal"><span class=
"pre">v
</span></tt> such that for each
<tt class=
"literal"><span class=
"pre">i
</span></tt>
93 in [
<tt class=
"literal"><span class=
"pre"><a href=
"./begin.html" class=
"identifier">begin
</a><v
>::type
</span></tt>,
<tt class=
"literal"><span class=
"pre"><a href=
"./end.html" class=
"identifier">end
</a><v
>::type
</span></tt>) and for each
<tt class=
"literal"><span class=
"pre">j
</span></tt> in
94 [
<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>)
95 <tt class=
"literal"><span class=
"pre"><a href=
"./deref.html" class=
"identifier">deref
</a><i
>::type
</span></tt> is identical to
96 <tt class=
"literal"><span class=
"pre"><a href=
"./transform.html" class=
"identifier">transform
</a><</span> <span class=
"pre"><a href=
"./deref.html" class=
"identifier">deref
</a><j
>::type,
</span> <span class=
"pre"><a href=
"./deref.html" class=
"identifier">deref
</a><<a href=
"./placeholders.html" class=
"identifier">_1
</a>></span> <span class=
"pre">>::type
</span></tt>.
</td>
98 <tr><td><tt class=
"literal"><span class=
"pre"><a href=
"./size.html" class=
"identifier">size
</a><v
>::type
</span></tt></td>
99 <td><p class=
"first">The size of
<tt class=
"literal"><span class=
"pre">v
</span></tt>;
<tt class=
"literal"><span class=
"pre"><a href=
"./size.html" class=
"identifier">size
</a><v
>::value
</span></tt> is equal to
</p>
100 <pre class=
"literal-block">
101 <a href=
"./deref.html" class=
"identifier">deref
</a>< <a href=
"./min-element.html" class=
"identifier">min_element
</a><
102 <a href=
"./transform-view.html" class=
"identifier">transform_view
</a>< seq,
<a href=
"./size.html" class=
"identifier">size
</a><<a href=
"./placeholders.html" class=
"identifier">_1
</a>> >
103 >::type
>::type::value;
105 <p class=
"last">linear complexity; see
<a class=
"reference internal" href=
"./forward-sequence.html">Forward Sequence
</a>.
</p>
111 <div class=
"section" id=
"id173">
112 <h3><a class=
"subsection-title" href=
"#example" name=
"example">Example
</a></h3>
113 <p>Element-wise sum of three vectors.
</p>
114 <pre class=
"literal-block">
115 typedef
<a href=
"./vector-c.html" class=
"identifier">vector_c
</a><int,
1,
2,
3,
4,
5> v1;
116 typedef
<a href=
"./vector-c.html" class=
"identifier">vector_c
</a><int,
5,
4,
3,
2,
1> v2;
117 typedef
<a href=
"./vector-c.html" class=
"identifier">vector_c
</a><int,
1,
1,
1,
1,
1> v3;
119 typedef
<a href=
"./transform-view.html" class=
"identifier">transform_view
</a><
120 <a href=
"./zip-view.html" class=
"identifier">zip_view
</a>< <a href=
"./vector.html" class=
"identifier">vector
</a><v1,v2,v3
> >
121 ,
<a href=
"./unpack-args.html" class=
"identifier">unpack_args
</a>< <a href=
"./plus.html" class=
"identifier">plus
</a><<a href=
"./placeholders.html" class=
"identifier">_1
</a>,
<a href=
"./placeholders.html" class=
"identifier">_2
</a>,
<a href=
"./placeholders.html" class=
"identifier">_3
</a>> >
124 <a href=
"./assert.html" class=
"identifier">BOOST_MPL_ASSERT
</a>((
<a href=
"./equal.html" class=
"identifier">equal
</a>< sum,
<a href=
"./vector-c.html" class=
"identifier">vector_c
</a><int,
7,
7,
7,
7,
7> > ));
127 <div class=
"section" id=
"id174">
128 <h3><a class=
"subsection-title" href=
"#see-also" name=
"see-also">See also
</a></h3>
129 <p><a class=
"reference internal" href=
"./sequences.html">Sequences
</a>,
<a class=
"reference internal" href=
"./views.html">Views
</a>,
<a class=
"reference internal" href=
"./filter-view.html">filter_view
</a>,
<a class=
"reference internal" href=
"./transform-view.html">transform_view
</a>,
<a class=
"reference internal" href=
"./joint-view.html">joint_view
</a>,
<a class=
"reference internal" href=
"./single-view.html">single_view
</a>,
<a class=
"reference internal" href=
"./iterator-range.html">iterator_range
</a></p>
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135 <td><div class=
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"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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