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< title > The MPL Reference Manual: empty_sequence< / title >
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< 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 = "./views.html" class = "navigation-link" > Views< / a > / < a href = "./empty-sequence.html" class = "navigation-link" > empty_sequence< / a > < / td >
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< div class = "section" id = "empty-sequence" >
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< h1 > < a class = "toc-backref" href = "./views.html#id1417" > empty_sequence< / a > < / h1 >
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< div class = "section" id = "id120" >
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< h3 > < a class = "subsection-title" href = "#synopsis" name = "synopsis" > Synopsis< / a > < / h3 >
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struct < a href = "./empty-sequence.html" class = "identifier" > empty_sequence< / a >
{
// < em > unspecified< / em >
// < em > ...< / em >
};
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< h3 > < a class = "subsection-title" href = "#description" name = "description" > Description< / a > < / h3 >
< p > Represents a sequence containing no elements.< / p >
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< h3 > < a class = "subsection-title" href = "#header" name = "header" > Header< / a > < / h3 >
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#include < < a href = "../../../../boost/mpl/empty_sequence.hpp" class = "header" > boost/mpl/empty_sequence.hpp< / a > >
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< div class = "section" id = "id123" >
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< h3 > < a class = "subsection-title" href = "#expression-semantics" name = "expression-semantics" > Expression semantics< / a > < / h3 >
< p > The semantics of an expression are defined only
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where they differ from, or are not defined in < a class = "reference internal" href = "./random-access-sequence.html" > Random Access Sequence< / a > .< / p >
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< p > In the following table, < tt class = "literal" > < span class = "pre" > s< / span > < / tt > is an instance of < tt class = "literal" > < span class = "pre" > < a href = "./empty-sequence.html" class = "identifier" > empty_sequence< / a > < / span > < / tt > .< / p >
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< tr > < th class = "head" > Expression< / th >
< th class = "head" > Semantics< / th >
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< / tr >
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< tr > < td > < tt class = "literal" > < span class = "pre" > < a href = "./empty-sequence.html" class = "identifier" > empty_sequence< / a > < / span > < / tt > < / td >
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< td > An empty < a class = "reference internal" href = "./random-access-sequence.html" > Random Access Sequence< / a > .< / td >
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< / tr >
< tr > < td > < tt class = "literal" > < span class = "pre" > < a href = "./size.html" class = "identifier" > size< / a > < s> ::type< / span > < / tt > < / td >
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< td > < tt class = "literal" > < span class = "pre" > < a href = "./size.html" class = "identifier" > size< / a > < s> ::value< / span > < span class = "pre" > ==< / span > < span class = "pre" > 0< / span > < / tt > ; see < a class = "reference internal" href = "./random-access-sequence.html" > Random Access Sequence< / a > .< / td >
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< h3 > < a class = "subsection-title" href = "#example" name = "example" > Example< / a > < / h3 >
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typedef < a href = "./begin.html" class = "identifier" > begin< / a > < < a href = "./empty-sequence.html" class = "identifier" > empty_sequence< / a > > ::type first;
typedef < a href = "./end.html" class = "identifier" > end< / a > < < a href = "./empty-sequence.html" class = "identifier" > empty_sequence< / a > > ::type last;
< a href = "./assert.html" class = "identifier" > BOOST_MPL_ASSERT< / a > (( is_same< first,last> ));
< a href = "./assert-relation.html" class = "identifier" > BOOST_MPL_ASSERT_RELATION< / a > ( < a href = "./size.html" class = "identifier" > size< / a > < < a href = "./empty-sequence.html" class = "identifier" > empty_sequence< / a > > ::value, ==, 0 );
typedef < a href = "./transform-view.html" class = "identifier" > transform_view< / a > <
< a href = "./empty-sequence.html" class = "identifier" > empty_sequence< / a >
, add_pointer< _>
> empty_view;
< a href = "./assert-relation.html" class = "identifier" > BOOST_MPL_ASSERT_RELATION< / a > ( < a href = "./size.html" class = "identifier" > size< / a > < < a href = "./empty-sequence.html" class = "identifier" > empty_sequence< / a > > ::value, ==, 0 );
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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 = "./sequences.html" > Sequences< / a > , < a class = "reference internal" href = "./views.html" > Views< / a > , < a class = "reference internal" href = "./vector.html" > vector< / a > , < a class = "reference internal" href = "./list.html" > list< / a > , < a class = "reference internal" href = "./single-view.html" > single_view< / 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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