forked from boostorg/fusion
1da53e2c3f
- added SFINAE-enable (http://article.gmane.org/gmane.comp.parsers.spirit.devel/3902) [SVN r68225]
41 lines
1.5 KiB
C++
41 lines
1.5 KiB
C++
/*=============================================================================
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Copyright (c) 2001-2006 Joel de Guzman
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Distributed under the Boost Software License, Version 1.0. (See accompanying
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file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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==============================================================================*/
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#if !defined(FUSION_ENABLE_COMPARISON_09232005_1958)
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#define FUSION_ENABLE_COMPARISON_09232005_1958
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#include <boost/mpl/or.hpp>
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#include <boost/mpl/and.hpp>
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#include <boost/mpl/not.hpp>
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#include <boost/mpl/equal_to.hpp>
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#include <boost/fusion/support/sequence_base.hpp>
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#include <boost/fusion/support/is_sequence.hpp>
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#include <boost/fusion/sequence/intrinsic/size.hpp>
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#include <boost/type_traits/is_convertible.hpp>
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namespace boost { namespace fusion { namespace traits
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{
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template <typename Sequence, typename Enable = void>
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struct is_native_fusion_sequence
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: is_convertible<Sequence, detail::from_sequence_convertible_type>
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{};
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template <typename Seq1, typename Seq2, typename Enable = void>
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struct enable_equality
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: mpl::or_<traits::is_sequence<Seq1>, traits::is_sequence<Seq2> >
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{};
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template <typename Seq1, typename Seq2, typename Enable = void>
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struct enable_comparison
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: mpl::and_<
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mpl::or_<traits::is_sequence<Seq1>, traits::is_sequence<Seq2> >
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, mpl::equal_to<result_of::size<Seq1>, result_of::size<Seq2> >
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>
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{};
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}}}
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#endif
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