| 1 | /*============================================================================= |
|---|
| 2 | Copyright (c) 2001-2014 Joel de Guzman |
|---|
| 3 | |
|---|
| 4 | Distributed under the Boost Software License, Version 1.0. (See accompanying |
|---|
| 5 | file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) |
|---|
| 6 | ================================================_==============================*/ |
|---|
| 7 | #if !defined(BOOST_SPIRIT_X3_TUPLE_TRAITS_JANUARY_2012_1132PM) |
|---|
| 8 | #define BOOST_SPIRIT_X3_TUPLE_TRAITS_JANUARY_2012_1132PM |
|---|
| 9 | |
|---|
| 10 | #include <boost/fusion/include/is_sequence.hpp> |
|---|
| 11 | #include <boost/fusion/include/is_view.hpp> |
|---|
| 12 | #include <boost/fusion/include/size.hpp> |
|---|
| 13 | #include <boost/mpl/bool.hpp> |
|---|
| 14 | #include <boost/mpl/and.hpp> |
|---|
| 15 | |
|---|
| 16 | namespace boost { namespace spirit { namespace x3 { namespace traits |
|---|
| 17 | { |
|---|
| 18 | template <typename A, typename B> |
|---|
| 19 | struct has_same_size |
|---|
| 20 | : mpl::bool_<( |
|---|
| 21 | fusion::result_of::size<A>::value == |
|---|
| 22 | fusion::result_of::size<B>::value |
|---|
| 23 | )> |
|---|
| 24 | {}; |
|---|
| 25 | |
|---|
| 26 | template <typename T, std::size_t N> |
|---|
| 27 | struct has_size |
|---|
| 28 | : mpl::bool_<(fusion::result_of::size<T>::value == N)> |
|---|
| 29 | {}; |
|---|
| 30 | |
|---|
| 31 | template <typename A, typename B> |
|---|
| 32 | struct is_same_size_sequence |
|---|
| 33 | : mpl::and_< |
|---|
| 34 | fusion::traits::is_sequence<A> |
|---|
| 35 | , fusion::traits::is_sequence<B> |
|---|
| 36 | , has_same_size<A, B> |
|---|
| 37 | > |
|---|
| 38 | {}; |
|---|
| 39 | |
|---|
| 40 | template <typename Seq> |
|---|
| 41 | struct is_size_one_sequence |
|---|
| 42 | : mpl::and_< |
|---|
| 43 | fusion::traits::is_sequence<Seq> |
|---|
| 44 | , has_size<Seq, 1> |
|---|
| 45 | > |
|---|
| 46 | {}; |
|---|
| 47 | |
|---|
| 48 | template <typename View> |
|---|
| 49 | struct is_size_one_view |
|---|
| 50 | : mpl::and_< |
|---|
| 51 | fusion::traits::is_view<View> |
|---|
| 52 | , has_size<View, 1> |
|---|
| 53 | > |
|---|
| 54 | {}; |
|---|
| 55 | }}}} |
|---|
| 56 | |
|---|
| 57 | #endif |
|---|
| 58 | |
|---|
