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< title > The MPL Reference Manual: back< / title >
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< body class = "docframe refmanual" >
< table class = "header" > < tr class = "header" > < td class = "header-group navigation-bar" > < span class = "navigation-group" > < a href = "./at-c.html" class = "navigation-link" > Prev< / a > < a href = "./begin.html" class = "navigation-link" > Next< / a > < / span > < span class = "navigation-group-separator" > | < / span > < span class = "navigation-group" > < a href = "./at-c.html" class = "navigation-link" > Back< / a > < a href = "./begin.html" class = "navigation-link" > Along< / a > < / span > < span class = "navigation-group-separator" > | < / span > < span class = "navigation-group" > < a href = "./intrinsic-metafunctions.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 = "./sequences.html" class = "navigation-link" > Sequences< / a > / < a href = "./intrinsic-metafunctions.html" class = "navigation-link" > Intrinsic Metafunctions< / a > / < a href = "./back.html" class = "navigation-link" > back< / a > < / td >
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< div class = "section" id = "back" >
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< h1 > < a class = "toc-backref" href = "./intrinsic-metafunctions.html#id1427" > back< / a > < / h1 >
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< div class = "section" id = "id193" >
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< h3 > < a class = "subsection-title" href = "#synopsis" name = "synopsis" > Synopsis< / a > < / h3 >
< pre class = "literal-block" >
template<
typename Sequence
>
struct < a href = "./back.html" class = "identifier" > back< / a >
{
typedef < em > unspecified< / em > type;
};
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< div class = "section" id = "id194" >
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< h3 > < a class = "subsection-title" href = "#description" name = "description" > Description< / a > < / h3 >
< p > Returns the last element in the sequence.< / p >
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< div class = "section" id = "id195" >
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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/back.hpp" class = "header" > boost/mpl/back.hpp< / a > >
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< div class = "section" id = "id196" >
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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 = "./tag-dispatched-metafunction.html" > Tag Dispatched Metafunction< / a > < / p >
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< div class = "section" id = "id197" >
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< h3 > < a class = "subsection-title" href = "#parameters" name = "parameters" > Parameters< / a > < / h3 >
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< colgroup >
< col width = "19%" / >
< col width = "35%" / >
< col width = "45%" / >
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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" > Sequence< / span > < / tt > < / td >
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< td > < a class = "reference internal" href = "./bidirectional-sequence.html" > Bidirectional Sequence< / a > < / td >
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< td > A sequence to be examined.< / td >
< / tr >
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< div class = "section" id = "id198" >
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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 < a class = "reference internal" href = "./bidirectional-sequence.html" > Bidirectional Sequence< / a > < tt class = "literal" > < span class = "pre" > s< / span > < / tt > :< / p >
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< pre class = "literal-block" >
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typedef < a href = "./back.html" class = "identifier" > back< / a > < s> ::type t;
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< / 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" / >
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< tr class = "field" > < th class = "field-name" > Return type:< / th > < td class = "field-body" > < p class = "first" > A type.< / p >
< / td >
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< / tr >
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< tr class = "field" > < th class = "field-name" > Precondition:< / th > < td class = "field-body" > < p class = "first" > < tt class = "literal" > < span class = "pre" > < a href = "./empty.html" class = "identifier" > empty< / a > < s> ::value< / span > < span class = "pre" > ==< / span > < span class = "pre" > false< / span > < / tt > .< / p >
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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 = "last literal-block" >
typedef < a href = "./deref.html" class = "identifier" > deref< / a > < < a href = "./prior.html" class = "identifier" > prior< / a > < < a href = "./end.html" class = "identifier" > end< / a > < s> ::type > ::type > ::type t;
< / pre >
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< div class = "section" id = "id199" >
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< h3 > < a class = "subsection-title" href = "#complexity" name = "complexity" > Complexity< / a > < / h3 >
< p > Amortized constant time.< / p >
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< div class = "section" id = "id200" >
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< h3 > < a class = "subsection-title" href = "#example" name = "example" > Example< / a > < / h3 >
< pre class = "literal-block" >
typedef < a href = "./range-c.html" class = "identifier" > range_c< / a > < int,0,1> range1;
typedef < a href = "./range-c.html" class = "identifier" > range_c< / a > < int,0,10> range2;
typedef < a href = "./range-c.html" class = "identifier" > range_c< / a > < int,-10,0> range3;
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< a href = "./assert-relation.html" class = "identifier" > BOOST_MPL_ASSERT_RELATION< / a > ( < a href = "./back.html" class = "identifier" > back< / a > < range1> ::value, ==, 0 );
< a href = "./assert-relation.html" class = "identifier" > BOOST_MPL_ASSERT_RELATION< / a > ( < a href = "./back.html" class = "identifier" > back< / a > < range2> ::value, ==, 9 );
< a href = "./assert-relation.html" class = "identifier" > BOOST_MPL_ASSERT_RELATION< / a > ( < a href = "./back.html" class = "identifier" > back< / a > < range3> ::value, ==, -1 );
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< div class = "section" id = "id201" >
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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 = "./bidirectional-sequence.html" > Bidirectional Sequence< / a > , < a class = "reference internal" href = "./front.html" > front< / a > , < a class = "reference internal" href = "./push-back.html" > push_back< / a > , < a class = "reference internal" href = "./end.html" > end< / a > , < a class = "reference internal" href = "./deref.html" > deref< / a > , < a class = "reference internal" href = "./at.html" > at< / a > < / p >
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< 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
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