/*=============================================================================
    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
