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- /*=============================================================================
- Copyright (c) 2001-2014 Joel de Guzman
- Distributed under the Boost Software License, Version 1.0. (See accompanying
- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
- ================================================_==============================*/
- #if !defined(BOOST_SPIRIT_X3_TUPLE_TRAITS_JANUARY_2012_1132PM)
- #define BOOST_SPIRIT_X3_TUPLE_TRAITS_JANUARY_2012_1132PM
- #include <boost/fusion/include/is_sequence.hpp>
- #include <boost/fusion/include/is_view.hpp>
- #include <boost/fusion/include/size.hpp>
- #include <boost/mpl/bool.hpp>
- #include <boost/mpl/and.hpp>
- namespace boost { namespace spirit { namespace x3 { namespace traits
- {
- template <typename A, typename B>
- struct has_same_size
- : mpl::bool_<(
- fusion::result_of::size<A>::value ==
- fusion::result_of::size<B>::value
- )>
- {};
- template <typename T, std::size_t N>
- struct has_size
- : mpl::bool_<(fusion::result_of::size<T>::value == N)>
- {};
- template <typename A, typename B>
- struct is_same_size_sequence
- : mpl::and_<
- fusion::traits::is_sequence<A>
- , fusion::traits::is_sequence<B>
- , has_same_size<A, B>
- >
- {};
- template <typename Seq>
- struct is_size_one_sequence
- : mpl::and_<
- fusion::traits::is_sequence<Seq>
- , has_size<Seq, 1>
- >
- {};
- template <typename View>
- struct is_size_one_view
- : mpl::and_<
- fusion::traits::is_view<View>
- , has_size<View, 1>
- >
- {};
- }}}}
- #endif
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