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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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