/*=============================================================================
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Copyright (c) 2001-2014 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(BOOST_SPIRIT_X3_TUPLE_TRAITS_JANUARY_2012_1132PM)
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#define BOOST_SPIRIT_X3_TUPLE_TRAITS_JANUARY_2012_1132PM
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#include <boost/fusion/include/is_sequence.hpp>
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#include <boost/fusion/include/is_view.hpp>
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#include <boost/fusion/include/size.hpp>
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#include <boost/mpl/bool.hpp>
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#include <boost/mpl/and.hpp>
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namespace boost { namespace spirit { namespace x3 { namespace traits
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{
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template <typename A, typename B>
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struct has_same_size
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: mpl::bool_<(
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fusion::result_of::size<A>::value ==
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fusion::result_of::size<B>::value
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)>
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{};
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template <typename T, std::size_t N>
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struct has_size
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: mpl::bool_<(fusion::result_of::size<T>::value == N)>
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{};
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template <typename A, typename B>
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struct is_same_size_sequence
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: mpl::and_<
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fusion::traits::is_sequence<A>
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, fusion::traits::is_sequence<B>
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, has_same_size<A, B>
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>
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{};
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template <typename Seq>
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struct is_size_one_sequence
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: mpl::and_<
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fusion::traits::is_sequence<Seq>
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, has_size<Seq, 1>
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>
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{};
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template <typename View>
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struct is_size_one_view
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: mpl::and_<
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fusion::traits::is_view<View>
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, has_size<View, 1>
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>
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{};
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}}}}
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#endif
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