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7 <title>The MPL Reference Manual: quote
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14 <div class=
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15 <h1><a class=
"toc-backref" href=
"./composition-and-argument-binding.html#id1532">quote
</a></h1>
16 <div class=
"section" id=
"id938">
17 <h3><a class=
"subsection-title" href=
"#synopsis" name=
"synopsis">Synopsis
</a></h3>
18 <pre class=
"literal-block">
20 template
< typename P1
> class F
21 , typename Tag =
<em>unspecified
</em>
25 //
<em>unspecified
</em>
32 template
< typename P1,
<em>...
</em> typename P
<em>n
</em> > class F
33 , typename Tag =
<em>unspecified
</em>
35 struct
<a href=
"./quote.html" class=
"identifier">quote
</a><em>n
</em>
37 //
<em>unspecified
</em>
42 <div class=
"section" id=
"id939">
43 <h3><a class=
"subsection-title" href=
"#description" name=
"description">Description
</a></h3>
44 <p><tt class=
"literal"><span class=
"pre"><a href=
"./quote.html" class=
"identifier">quote
</a></span></tt><em>n
</em> is a higher-order primitive that wraps an
<em>n
</em>-ary
<a class=
"reference internal" href=
"./metafunction.html">Metafunction
</a> to create
45 a corresponding
<a class=
"reference internal" href=
"./metafunction-class.html">Metafunction Class
</a>.
</p>
47 <div class=
"section" id=
"id940">
48 <h3><a class=
"subsection-title" href=
"#header" name=
"header">Header
</a></h3>
49 <pre class=
"literal-block">
50 #include
<<a href=
"../../../../boost/mpl/quote.hpp" class=
"header">boost/mpl/quote.hpp
</a>>
53 <div class=
"section" id=
"id941">
54 <h3><a class=
"subsection-title" href=
"#model-of" name=
"model-of">Model of
</a></h3>
55 <p><a class=
"reference internal" href=
"./metafunction-class.html">Metafunction Class
</a></p>
57 <div class=
"section" id=
"id942">
58 <h3><a class=
"subsection-title" href=
"#parameters" name=
"parameters">Parameters
</a></h3>
59 <table border=
"1" class=
"docutils table">
65 <thead valign=
"bottom">
66 <tr><th class=
"head">Parameter
</th>
67 <th class=
"head">Requirement
</th>
68 <th class=
"head">Description
</th>
72 <tr><td><tt class=
"literal"><span class=
"pre">F
</span></tt></td>
73 <td><a class=
"reference internal" href=
"./metafunction.html">Metafunction
</a></td>
74 <td>A metafunction to wrap.
</td>
76 <tr><td><tt class=
"literal"><span class=
"pre">Tag
</span></tt></td>
78 <td>A tag determining wrap semantics.
</td>
83 <div class=
"section" id=
"id943">
84 <h3><a class=
"subsection-title" href=
"#expression-semantics" name=
"expression-semantics">Expression semantics
</a></h3>
85 <p>For any
<em>n
</em>-ary
<a class=
"reference internal" href=
"./metafunction.html">Metafunction
</a> <tt class=
"literal"><span class=
"pre">f
</span></tt> and arbitrary type
<tt class=
"literal"><span class=
"pre">tag
</span></tt>:
</p>
86 <pre class=
"literal-block">
87 typedef
<a href=
"./quote.html" class=
"identifier">quote
</a><em>n
</em><f
> g;
88 typedef
<a href=
"./quote.html" class=
"identifier">quote
</a><em>n
</em><f,tag
> g;
90 <table class=
"docutils field-list" frame=
"void" rules=
"none">
91 <col class=
"field-name" />
92 <col class=
"field-body" />
94 <tr class=
"field"><th class=
"field-name">Return type:
</th><td class=
"field-body"><p class=
"first"><a class=
"reference internal" href=
"./metafunction-class.html">Metafunction Class
</a></p>
97 <tr class=
"field"><th class=
"field-name">Semantics:
</th><td class=
"field-body"><p class=
"first">Equivalent to
</p>
98 <pre class=
"literal-block">
101 template
< typename A1,
<em>...
</em> typename A
<em>n
</em> > struct
<a href=
"./apply.html" class=
"identifier">apply
</a>
102 : f
<A1,
<em>...
</em>A
<em>n
</em>>
107 <p>if
<tt class=
"literal"><span class=
"pre">f
<A1,...An
></span></tt> has a nested type member
<tt class=
"literal"><span class=
"pre">::type
</span></tt>, and to
</p>
108 <pre class=
"literal-block">
111 template
< typename A1,
<em>...
</em> typename A
<em>n
</em> > struct
<a href=
"./apply.html" class=
"identifier">apply
</a>
113 typedef f
<A1,
<em>...
</em>A
<em>n
</em>> type;
117 <p class=
"last">otherwise.
</p>
123 <div class=
"section" id=
"id944">
124 <h3><a class=
"subsection-title" href=
"#example" name=
"example">Example
</a></h3>
125 <pre class=
"literal-block">
126 template
< typename T
> struct f1
132 typename T1, typename T2, typename T3, typename T4, typename T5
139 typedef
<a href=
"./quote.html" class=
"identifier">quote
</a><tt class=
"literal"><span class=
"pre">1</span></tt><f1
>::
<a href=
"./apply.html" class=
"identifier">apply
</a><int
>::type t1;
140 typedef
<a href=
"./quote.html" class=
"identifier">quote
</a><tt class=
"literal"><span class=
"pre">5</span></tt><f5
>::
<a href=
"./apply.html" class=
"identifier">apply
</a><char,short,int,long,float
>::type t5;
142 <a href=
"./assert.html" class=
"identifier">BOOST_MPL_ASSERT
</a>(( is_same
< t1, int
> ));
143 <a href=
"./assert.html" class=
"identifier">BOOST_MPL_ASSERT
</a>(( is_same
< t5, f5
<char,short,int,long,float
> > ));
146 <div class=
"section" id=
"id945">
147 <h3><a class=
"subsection-title" href=
"#see-also" name=
"see-also">See also
</a></h3>
148 <p><a class=
"reference internal" href=
"./composition-and-argument-binding.html">Composition and Argument Binding
</a>,
<a class=
"reference internal" href=
"./invocation.html">invocation
</a>,
<a class=
"reference internal" href=
"./bind.html">bind
</a>,
<a class=
"reference internal" href=
"./lambda.html">lambda
</a>,
<a class=
"reference internal" href=
"./protect.html">protect
</a>,
<a class=
"reference internal" href=
"./apply.html">apply
</a></p>
149 <!-- Metafunctions/Composition and Argument Binding//arg |50 -->
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155 <td><div class=
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"copyright">Copyright ©
2001-
2009 Aleksey Gurtovoy and David Abrahams
</div>
156 Distributed under the Boost Software License, Version
1.0. (See accompanying
157 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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