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< title > The MPL Reference Manual: quote</ title >
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< table class = "header" >< tr class = "header" >< td class = "header-group navigation-bar" >< span class = "navigation-group" >< a href = "./bind.html" class = "navigation-link" > Prev</ a > < a href = "./arg.html" class = "navigation-link" > Next</ a ></ span >< span class = "navigation-group-separator" > | </ span >< span class = "navigation-group" >< a href = "./bind.html" class = "navigation-link" > Back</ a > < a href = "./arg.html" class = "navigation-link" > Along</ a ></ span >< span class = "navigation-group-separator" > | </ span >< span class = "navigation-group" >< a href = "./composition-and-argument-binding.html" class = "navigation-link" > Up</ a > < a href = "../refmanual.html" class = "navigation-link" > Home</ a ></ span >< span class = "navigation-group-separator" > | </ span >< span class = "navigation-group" >< a href = "./refmanual_toc.html" class = "navigation-link" > Full TOC</ a ></ span ></ td >
< td class = "header-group page-location" >< a href = "../refmanual.html" class = "navigation-link" > Front Page</ a > / < a href = "./metafunctions.html" class = "navigation-link" > Metafunctions</ a > / < a href = "./composition-and-argument-binding.html" class = "navigation-link" > Composition and Argument Binding</ a > / < a href = "./quote.html" class = "navigation-link" > quote</ a ></ td >
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< div class = "section" id = "quote" >
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< h1 >< a class = "toc-backref" href = "./composition-and-argument-binding.html#id1532" > quote</ a ></ h1 >
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< div class = "section" id = "id938" >
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< h3 >< a class = "subsection-title" href = "#synopsis" name = "synopsis" > Synopsis</ a ></ h3 >
< pre class = "literal-block" >
template<
template< typename P1 > class F
, typename Tag = < em > unspecified</ em >
>
struct quote1
{
// < em > unspecified</ em >
// < em > ...</ em >
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};
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< em > ...</ em >
template<
template< typename P1,< em > ...</ em > typename P< em > n</ em > > class F
, typename Tag = < em > unspecified</ em >
>
struct < a href = "./quote.html" class = "identifier" > quote</ a >< em > n</ em >
{
// < em > unspecified</ em >
// < em > ...</ em >
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};
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</ pre >
</ div >
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< div class = "section" id = "id939" >
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< h3 >< a class = "subsection-title" href = "#description" name = "description" > Description</ a ></ h3 >
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< 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
a corresponding < a class = "reference internal" href = "./metafunction-class.html" > Metafunction Class</ a > .</ p >
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</ div >
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< div class = "section" id = "id940" >
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< h3 >< a class = "subsection-title" href = "#header" name = "header" > Header</ a ></ h3 >
< pre class = "literal-block" >
#include < < a href = "../../../../boost/mpl/quote.hpp" class = "header" > boost/mpl/quote.hpp</ a > >
</ pre >
</ div >
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< div class = "section" id = "id941" >
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< h3 >< a class = "subsection-title" href = "#model-of" name = "model-of" > Model of</ a ></ h3 >
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< p >< a class = "reference internal" href = "./metafunction-class.html" > Metafunction Class</ a ></ p >
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</ div >
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< div class = "section" id = "id942" >
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< h3 >< a class = "subsection-title" href = "#parameters" name = "parameters" > Parameters</ a ></ h3 >
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< table border = "1" class = "docutils table" >
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< thead valign = "bottom" >
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< tr >< th class = "head" > Parameter</ th >
< th class = "head" > Requirement</ th >
< th class = "head" > Description</ th >
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</ tr >
</ thead >
< tbody valign = "top" >
< tr >< td >< tt class = "literal" >< span class = "pre" > F</ span ></ tt ></ td >
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< td >< a class = "reference internal" href = "./metafunction.html" > Metafunction</ a ></ td >
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< td > A metafunction to wrap.</ td >
</ tr >
< tr >< td >< tt class = "literal" >< span class = "pre" > Tag</ span ></ tt ></ td >
< td > Any type</ td >
< td > A tag determining wrap semantics.</ td >
</ tr >
</ tbody >
</ table >
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< div class = "section" id = "id943" >
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< h3 >< a class = "subsection-title" href = "#expression-semantics" name = "expression-semantics" > Expression semantics</ a ></ h3 >
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< 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 >
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< pre class = "literal-block" >
typedef < a href = "./quote.html" class = "identifier" > quote</ a >< em > n</ em > < f> g;
typedef < a href = "./quote.html" class = "identifier" > quote</ a >< em > n</ em > < f,tag> g;
</ pre >
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< table class = "docutils field-list" frame = "void" rules = "none" >
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< col class = "field-name" />
< col class = "field-body" />
< tbody valign = "top" >
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< 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 >
</ td >
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</ tr >
< tr class = "field" >< th class = "field-name" > Semantics:</ th >< td class = "field-body" >< p class = "first" > Equivalent to</ p >
< pre class = "literal-block" >
struct g
{
template< typename A1,< em > ...</ em > typename A< em > n</ em > > struct < a href = "./apply.html" class = "identifier" > apply</ a >
: f< A1,< em > ...</ em > A< em > n</ em > >
{
};
};
</ pre >
< 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 >
< pre class = "literal-block" >
struct g
{
template< typename A1,< em > ...</ em > typename A< em > n</ em > > struct < a href = "./apply.html" class = "identifier" > apply</ a >
{
typedef f< A1,< em > ...</ em > A< em > n</ em > > type;
};
};
</ pre >
< p class = "last" > otherwise.</ p >
</ td >
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< div class = "section" id = "id944" >
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< h3 >< a class = "subsection-title" href = "#example" name = "example" > Example</ a ></ h3 >
< pre class = "literal-block" >
template< typename T > struct f1
{
typedef T type;
};
template<
typename T1, typename T2, typename T3, typename T4, typename T5
>
struct f5
{
// no 'type' member!
};
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;
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;
< a href = "./assert.html" class = "identifier" > BOOST_MPL_ASSERT</ a > (( is_same< t1, int > ));
< a href = "./assert.html" class = "identifier" > BOOST_MPL_ASSERT</ a > (( is_same< t5, f5< char,short,int,long,float> > ));
</ pre >
</ div >
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< div class = "section" id = "id945" >
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< h3 >< a class = "subsection-title" href = "#see-also" name = "see-also" > See also</ a ></ h3 >
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< 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 >
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<!-- Metafunctions/Composition and Argument Binding//arg |50 -->
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< table class = "footer" >< tr class = "footer" >< td class = "header-group navigation-bar" >< span class = "navigation-group" >< a href = "./bind.html" class = "navigation-link" > Prev</ a > < a href = "./arg.html" class = "navigation-link" > Next</ a ></ span >< span class = "navigation-group-separator" > | </ span >< span class = "navigation-group" >< a href = "./bind.html" class = "navigation-link" > Back</ a > < a href = "./arg.html" class = "navigation-link" > Along</ a ></ span >< span class = "navigation-group-separator" > | </ span >< span class = "navigation-group" >< a href = "./composition-and-argument-binding.html" class = "navigation-link" > Up</ a > < a href = "../refmanual.html" class = "navigation-link" > Home</ a ></ span >< span class = "navigation-group-separator" > | </ span >< span class = "navigation-group" >< a href = "./refmanual_toc.html" class = "navigation-link" > Full TOC</ a ></ span ></ td >
< td >< div class = "copyright-footer" >< div class = "copyright" > Copyright © 2001-2009 Aleksey Gurtovoy and David Abrahams</ div >
Distributed under the Boost Software License, Version 1.0. (See accompanying
file LICENSE_1_0.txt or copy at < a class = "reference external" href = "http://www.boost.org/LICENSE_1_0.txt" target = "_top" > http://www.boost.org/LICENSE_1_0.txt</ a > )</ div ></ td ></ tr ></ table ></ body >
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