boost/fusion/algorithm/iteration/detail/fold.hpp
/*=============================================================================
Copyright (c) 2001-2011 Joel de Guzman
Copyright (c) 2006 Dan Marsden
Copyright (c) 2009-2010 Christopher Schmidt
Copyright (c) 2015 Kohei Takahashi
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)
==============================================================================*/
#include <boost/preprocessor/cat.hpp>
#define FUSION_HASH #
#ifdef BOOST_FUSION_REVERSE_FOLD
# ifdef BOOST_FUSION_ITER_FOLD
# define BOOST_FUSION_FOLD_NAME reverse_iter_fold
# else
# define BOOST_FUSION_FOLD_NAME reverse_fold
# endif
# define BOOST_FUSION_FOLD_IMPL_FIRST_IT_FUNCTION end
# define BOOST_FUSION_FOLD_IMPL_NEXT_IT_FUNCTION prior
# define BOOST_FUSION_FOLD_IMPL_FIRST_IT_META_TRANSFORM(IT) \
typename fusion::result_of::prior<IT>::type
# define BOOST_FUSION_FOLD_IMPL_FIRST_IT_TRANSFORM(IT) fusion::prior(IT)
#else
# ifdef BOOST_FUSION_ITER_FOLD
# define BOOST_FUSION_FOLD_NAME iter_fold
# else
# define BOOST_FUSION_FOLD_NAME fold
# endif
# define BOOST_FUSION_FOLD_IMPL_FIRST_IT_FUNCTION begin
# define BOOST_FUSION_FOLD_IMPL_NEXT_IT_FUNCTION next
# define BOOST_FUSION_FOLD_IMPL_FIRST_IT_META_TRANSFORM(IT) IT
# define BOOST_FUSION_FOLD_IMPL_FIRST_IT_TRANSFORM(IT) IT
#endif
#ifdef BOOST_FUSION_ITER_FOLD
# define BOOST_FUSION_FOLD_IMPL_INVOKE_IT_META_TRANSFORM(IT) IT&
# define BOOST_FUSION_FOLD_IMPL_INVOKE_IT_TRANSFORM(IT) IT
#else
# define BOOST_FUSION_FOLD_IMPL_INVOKE_IT_META_TRANSFORM(IT) \
typename fusion::result_of::deref<IT>::type
# define BOOST_FUSION_FOLD_IMPL_INVOKE_IT_TRANSFORM(IT) fusion::deref(IT)
#endif
#if (defined(__WAVE__) && defined(BOOST_FUSION_CREATE_PREPROCESSED_FILES))
FUSION_HASH if BOOST_WORKAROUND BOOST_PREVENT_MACRO_SUBSTITUTION (BOOST_MSVC, < 1500)
FUSION_HASH define BOOST_FUSION_FOLD_IMPL_ENABLER(T) void
FUSION_HASH else
FUSION_HASH define BOOST_FUSION_FOLD_IMPL_ENABLER(T) typename T::type
FUSION_HASH endif
#else
# if BOOST_WORKAROUND(BOOST_MSVC, < 1500)
# define BOOST_FUSION_FOLD_IMPL_ENABLER(T) void
# else
# define BOOST_FUSION_FOLD_IMPL_ENABLER(T) typename T::type
# endif
#endif
namespace boost { namespace fusion
{
namespace detail
{
template<int SeqSize, typename It, typename State, typename F, typename = void
#if defined(__WAVE__) && defined(BOOST_FUSION_CREATE_PREPROCESSED_FILES)
FUSION_HASH if BOOST_WORKAROUND BOOST_PREVENT_MACRO_SUBSTITUTION (BOOST_MSVC, < 1500)
#endif
#if BOOST_WORKAROUND(BOOST_MSVC, < 1500) || \
(defined(__WAVE__) && defined(BOOST_FUSION_CREATE_PREPROCESSED_FILES))
// Dirty hack: those compilers cannot choose exactly one partial specialization.
, bool = SeqSize == 0
#endif
#if defined(__WAVE__) && defined(BOOST_FUSION_CREATE_PREPROCESSED_FILES)
FUSION_HASH endif
#endif
>
struct BOOST_PP_CAT(result_of_it_,BOOST_FUSION_FOLD_NAME)
{};
template<typename It, typename State, typename F>
struct BOOST_PP_CAT(result_of_it_,BOOST_FUSION_FOLD_NAME)<0,It,State,F
, typename boost::enable_if_has_type<BOOST_FUSION_FOLD_IMPL_ENABLER(State)>::type
#if defined(__WAVE__) && defined(BOOST_FUSION_CREATE_PREPROCESSED_FILES)
FUSION_HASH if BOOST_WORKAROUND BOOST_PREVENT_MACRO_SUBSTITUTION (BOOST_MSVC, < 1500)
#endif
#if BOOST_WORKAROUND(BOOST_MSVC, < 1500) || \
(defined(__WAVE__) && defined(BOOST_FUSION_CREATE_PREPROCESSED_FILES))
, true
#endif
#if defined(__WAVE__) && defined(BOOST_FUSION_CREATE_PREPROCESSED_FILES)
FUSION_HASH endif
#endif
>
{
typedef typename State::type type;
};
template<int SeqSize, typename It, typename State, typename F>
struct BOOST_PP_CAT(result_of_it_,BOOST_FUSION_FOLD_NAME)<SeqSize,It,State,F
, typename boost::enable_if_has_type<
#if defined(__WAVE__) && defined(BOOST_FUSION_CREATE_PREPROCESSED_FILES)
FUSION_HASH if BOOST_WORKAROUND BOOST_PREVENT_MACRO_SUBSTITUTION (BOOST_MSVC, >= 1500)
#endif
#if BOOST_WORKAROUND(BOOST_MSVC, >= 1500) || \
(defined(__WAVE__) && defined(BOOST_FUSION_CREATE_PREPROCESSED_FILES))
// Following SFINAE enables to avoid MSVC 9's partial specialization
// ambiguous bug but MSVC 8 don't compile, and moreover MSVC 8 style
// workaround won't work with MSVC 9.
typename boost::disable_if_c<SeqSize == 0, State>::type::type
#if defined(__WAVE__) && defined(BOOST_FUSION_CREATE_PREPROCESSED_FILES)
FUSION_HASH else
BOOST_FUSION_FOLD_IMPL_ENABLER(State)
#endif
#else
BOOST_FUSION_FOLD_IMPL_ENABLER(State)
#endif
#if defined(__WAVE__) && defined(BOOST_FUSION_CREATE_PREPROCESSED_FILES)
FUSION_HASH endif
#endif
>::type
#if defined(__WAVE__) && defined(BOOST_FUSION_CREATE_PREPROCESSED_FILES)
FUSION_HASH if BOOST_WORKAROUND BOOST_PREVENT_MACRO_SUBSTITUTION (BOOST_MSVC, < 1500)
#endif
#if BOOST_WORKAROUND(BOOST_MSVC, < 1500) || \
(defined(__WAVE__) && defined(BOOST_FUSION_CREATE_PREPROCESSED_FILES))
, false
#endif
#if defined(__WAVE__) && defined(BOOST_FUSION_CREATE_PREPROCESSED_FILES)
FUSION_HASH endif
#endif
>
: BOOST_PP_CAT(result_of_it_,BOOST_FUSION_FOLD_NAME)<
SeqSize-1
, typename result_of::BOOST_FUSION_FOLD_IMPL_NEXT_IT_FUNCTION<It>::type
, boost::result_of<
F(
typename add_reference<typename State::type>::type,
BOOST_FUSION_FOLD_IMPL_INVOKE_IT_META_TRANSFORM(It const)
)
>
, F
>
{};
template<typename It, typename State, typename F>
BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
inline typename BOOST_PP_CAT(result_of_it_,BOOST_FUSION_FOLD_NAME)<
0
, It
, State
, F
>::type
BOOST_PP_CAT(it_,BOOST_FUSION_FOLD_NAME)(mpl::int_<0>, It const&, typename State::type state, F&)
{
return state;
}
template<typename It, typename State, typename F, int SeqSize>
BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
inline typename lazy_enable_if_c<
SeqSize != 0
, BOOST_PP_CAT(result_of_it_,BOOST_FUSION_FOLD_NAME)<
SeqSize
, It
, State
, F
>
>::type
BOOST_PP_CAT(it_,BOOST_FUSION_FOLD_NAME)(mpl::int_<SeqSize>, It const& it, typename State::type state, F& f)
{
return BOOST_PP_CAT(it_,BOOST_FUSION_FOLD_NAME)<
typename result_of::BOOST_FUSION_FOLD_IMPL_NEXT_IT_FUNCTION<It>::type
, boost::result_of<
F(
typename add_reference<typename State::type>::type,
BOOST_FUSION_FOLD_IMPL_INVOKE_IT_META_TRANSFORM(It const)
)
>
, F
>(
mpl::int_<SeqSize-1>()
, fusion::BOOST_FUSION_FOLD_IMPL_NEXT_IT_FUNCTION(it)
, f(state, BOOST_FUSION_FOLD_IMPL_INVOKE_IT_TRANSFORM(it))
, f
);
}
template<typename Seq, typename State, typename F
, bool = traits::is_sequence<Seq>::value
, bool = traits::is_segmented<Seq>::value>
struct BOOST_PP_CAT(result_of_,BOOST_FUSION_FOLD_NAME)
{};
template<typename Seq, typename State, typename F>
struct BOOST_PP_CAT(result_of_,BOOST_FUSION_FOLD_NAME)<Seq, State, F, true, false>
: BOOST_PP_CAT(result_of_it_,BOOST_FUSION_FOLD_NAME)<
result_of::size<Seq>::value
, BOOST_FUSION_FOLD_IMPL_FIRST_IT_META_TRANSFORM(
typename result_of::BOOST_FUSION_FOLD_IMPL_FIRST_IT_FUNCTION<Seq>::type
)
, add_reference<State>
, F
>
{};
template<typename Seq, typename State, typename F>
BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
inline typename BOOST_PP_CAT(result_of_,BOOST_FUSION_FOLD_NAME)<Seq, State, F>::type
BOOST_FUSION_FOLD_NAME(Seq& seq, State& state, F& f)
{
return BOOST_PP_CAT(it_,BOOST_FUSION_FOLD_NAME)<
BOOST_FUSION_FOLD_IMPL_FIRST_IT_META_TRANSFORM(
typename result_of::BOOST_FUSION_FOLD_IMPL_FIRST_IT_FUNCTION<Seq>::type
)
, add_reference<State>
, F
>(
typename result_of::size<Seq>::type()
, BOOST_FUSION_FOLD_IMPL_FIRST_IT_TRANSFORM(
fusion::BOOST_FUSION_FOLD_IMPL_FIRST_IT_FUNCTION(seq)
)
, state
, f
);
}
}
namespace result_of
{
template<typename Seq, typename State, typename F>
struct BOOST_FUSION_FOLD_NAME
: detail::BOOST_PP_CAT(result_of_,BOOST_FUSION_FOLD_NAME)<Seq, State, F>
{};
}
template<typename Seq, typename State, typename F>
BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
inline typename result_of::BOOST_FUSION_FOLD_NAME<
Seq
, State const
, F
>::type
BOOST_FUSION_FOLD_NAME(Seq& seq, State const& state, F f)
{
return detail::BOOST_FUSION_FOLD_NAME<Seq, State const, F>(seq, state, f);
}
template<typename Seq, typename State, typename F>
BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
inline typename result_of::BOOST_FUSION_FOLD_NAME<
Seq const
, State const
, F
>::type
BOOST_FUSION_FOLD_NAME(Seq const& seq, State const& state, F f)
{
return detail::BOOST_FUSION_FOLD_NAME<Seq const, State const, F>(seq, state, f);
}
template<typename Seq, typename State, typename F>
BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
inline typename result_of::BOOST_FUSION_FOLD_NAME<
Seq
, State
, F
>::type
BOOST_FUSION_FOLD_NAME(Seq& seq, State& state, F f)
{
return detail::BOOST_FUSION_FOLD_NAME<Seq, State, F>(seq, state, f);
}
template<typename Seq, typename State, typename F>
BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
inline typename result_of::BOOST_FUSION_FOLD_NAME<
Seq const
, State
, F
>::type
BOOST_FUSION_FOLD_NAME(Seq const& seq, State& state, F f)
{
return detail::BOOST_FUSION_FOLD_NAME<Seq const, State, F>(seq, state, f);
}
}}
#undef BOOST_FUSION_FOLD_NAME
#undef BOOST_FUSION_FOLD_IMPL_ENABLER
#undef BOOST_FUSION_FOLD_IMPL_FIRST_IT_FUNCTION
#undef BOOST_FUSION_FOLD_IMPL_NEXT_IT_FUNCTION
#undef BOOST_FUSION_FOLD_IMPL_FIRST_IT_META_TRANSFORM
#undef BOOST_FUSION_FOLD_IMPL_FIRST_IT_TRANSFORM
#undef BOOST_FUSION_FOLD_IMPL_INVOKE_IT_META_TRANSFORM
#undef BOOST_FUSION_FOLD_IMPL_INVOKE_IT_TRANSFORM
#undef FUSION_HASH
