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#ifndef BOOST_METAPARSE_META_HS_CURRY_HPP
#define BOOST_METAPARSE_META_HS_CURRY_HPP
// Copyright Abel Sinkovics (abel@sinkovics.hu) 2010.
// 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/mpl/eval_if.hpp>
#include <boost/mpl/equal_to.hpp>
#include <boost/mpl/int.hpp>
#include <boost/mpl/apply.hpp>
#include <boost/mpl/minus.hpp>
#include <boost/mpl/push_back.hpp>
#include <boost/mpl/unpack_args.hpp>
#include <boost/mpl/deque.hpp>
#include <boost/mpl/quote.hpp>
#include <boost/preprocessor/repetition/repeat_from_to.hpp>
#include <boost/preprocessor/repetition/enum_params.hpp>
#include <boost/preprocessor/repetition/enum.hpp>
#include <boost/preprocessor/cat.hpp>
#include <boost/preprocessor/tuple/eat.hpp>
#ifndef CURRY_MAX_ARGUMENT
# define CURRY_MAX_ARGUMENT 5
#endif
namespace impl
{
template <
class UnpackedMetafunctionClass,
class ArgumentsLeft,
class ArgumentList
>
struct curry_impl;
template <
class UnpackedMetafunctionClass,
class ArgumentsLeft,
class ArgumentList
>
struct next_currying_step
{
typedef next_currying_step type;
template <class T>
struct apply :
curry_impl<
UnpackedMetafunctionClass,
typename boost::mpl::minus<
ArgumentsLeft,
boost::mpl::int_<1>
>::type,
typename boost::mpl::push_back<ArgumentList, T>::type
>
{};
};
template <
class UnpackedMetafunctionClass,
class ArgumentsLeft,
class ArgumentList
>
struct curry_impl :
boost::mpl::eval_if<
typename boost::mpl::equal_to<
ArgumentsLeft,
boost::mpl::int_<0>
>::type,
boost::mpl::apply<UnpackedMetafunctionClass, ArgumentList>,
next_currying_step<
UnpackedMetafunctionClass,
ArgumentsLeft,
ArgumentList
>
>
{};
}
template <class T>
struct curry0 : T {};
#ifdef CURRY
# error CURRY already defined
#endif
#define CURRY(z, n, unused) \
template <template <BOOST_PP_ENUM(n,class BOOST_PP_TUPLE_EAT(3),~)> class T> \
struct BOOST_PP_CAT(curry, n) : \
impl::curry_impl< \
boost::mpl::unpack_args<boost::mpl::BOOST_PP_CAT(quote, n) <T> >, \
boost::mpl::int_<n>, \
boost::mpl::deque<> \
>::type \
{};
BOOST_PP_REPEAT_FROM_TO(1, CURRY_MAX_ARGUMENT, CURRY, ~)
#undef CURRY
#endif
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