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// Copyright Cromwell D. Enage 2019.
// 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)
#ifndef BOOST_PARAMETER_COMPOSE_HPP
#define BOOST_PARAMETER_COMPOSE_HPP
#include <boost/parameter/aux_/arg_list.hpp>
namespace boost { namespace parameter {
inline BOOST_CONSTEXPR ::boost::parameter::aux::empty_arg_list compose()
{
return ::boost::parameter::aux::empty_arg_list();
}
}} // namespace boost::parameter
#include <boost/parameter/config.hpp>
#if defined(BOOST_PARAMETER_HAS_PERFECT_FORWARDING)
namespace boost { namespace parameter { namespace aux {
#if defined(BOOST_PARAMETER_CAN_USE_MP11)
template <typename ...TaggedArgs>
struct compose_arg_list
{
using type = ::boost::parameter::aux::flat_like_arg_list<
::boost::parameter::aux::flat_like_arg_tuple<
typename TaggedArgs::base_type::key_type
, typename TaggedArgs::base_type
>...
>;
};
#else // !defined(BOOST_PARAMETER_CAN_USE_MP11)
template <typename TaggedArg0, typename ...TaggedArgs>
struct compose_arg_list;
template <typename TaggedArg0>
struct compose_arg_list<TaggedArg0>
{
typedef ::boost::parameter::aux::arg_list<TaggedArg0> type;
};
template <typename TaggedArg0, typename ...TaggedArgs>
struct compose_arg_list
{
typedef ::boost::parameter::aux::arg_list<
TaggedArg0
, typename ::boost::parameter::aux
::compose_arg_list<TaggedArgs...>::type
> type;
};
#endif // BOOST_PARAMETER_CAN_USE_MP11
}}} // namespace boost::parameter::aux
#include <boost/parameter/are_tagged_arguments.hpp>
#include <boost/core/enable_if.hpp>
namespace boost { namespace parameter { namespace result_of {
template <typename ...TaggedArgs>
struct compose
: ::boost::lazy_enable_if<
::boost::parameter::are_tagged_arguments<TaggedArgs...>
, ::boost::parameter::aux::compose_arg_list<TaggedArgs...>
>
{
};
template <>
struct compose<>
{
typedef ::boost::parameter::aux::empty_arg_list type;
};
}}} // namespace boost::parameter::result_of
namespace boost { namespace parameter {
template <typename TaggedArg0, typename ...TaggedArgs>
inline BOOST_CONSTEXPR typename ::boost::parameter::result_of
::compose<TaggedArg0,TaggedArgs...>::type
compose(TaggedArg0 const& arg0, TaggedArgs const&... args)
{
return typename ::boost::parameter::aux
::compose_arg_list<TaggedArg0,TaggedArgs...>::type(
::boost::parameter::aux::value_type_is_not_void()
, arg0
, args...
);
}
}} // namespace boost::parameter
#else // !defined(BOOST_PARAMETER_HAS_PERFECT_FORWARDING)
#define BOOST_PARAMETER_compose_arg_list_type_suffix(z, n, suffix) suffix
#include <boost/preprocessor/cat.hpp>
#define BOOST_PARAMETER_compose_arg_list_type_prefix(z, n, prefix) \
::boost::parameter::aux::arg_list<BOOST_PP_CAT(prefix, n)
/**/
#include <boost/preprocessor/facilities/intercept.hpp>
#include <boost/preprocessor/repetition/enum.hpp>
#include <boost/preprocessor/repetition/repeat.hpp>
#define BOOST_PARAMETER_compose_arg_list_type(z, n, prefix) \
BOOST_PP_CAT(BOOST_PP_ENUM_, z)( \
n, BOOST_PARAMETER_compose_arg_list_type_prefix, prefix \
) BOOST_PP_CAT(BOOST_PP_REPEAT_, z)( \
n, BOOST_PARAMETER_compose_arg_list_type_suffix, > \
)
/**/
#include <boost/parameter/aux_/void.hpp>
#include <boost/preprocessor/arithmetic/inc.hpp>
#include <boost/preprocessor/arithmetic/sub.hpp>
#include <boost/preprocessor/repetition/enum_params.hpp>
#include <boost/preprocessor/repetition/enum_binary_params.hpp>
#include <boost/preprocessor/repetition/enum_trailing_params.hpp>
#if defined(BOOST_NO_SFINAE)
#define BOOST_PARAMETER_compose_arg_list_function_overload(z, n, prefix) \
template <BOOST_PP_ENUM_PARAMS_Z(z, n, typename prefix)> \
inline BOOST_CONSTEXPR \
BOOST_PARAMETER_compose_arg_list_type(z, n, prefix) \
compose(BOOST_PP_ENUM_BINARY_PARAMS_Z(z, n, prefix, const& a)) \
{ \
return BOOST_PARAMETER_compose_arg_list_type(z, n, prefix)( \
BOOST_PP_ENUM_PARAMS_Z(z, n, a) \
BOOST_PP_ENUM_TRAILING_PARAMS_Z( \
z \
, BOOST_PP_SUB(BOOST_PARAMETER_COMPOSE_MAX_ARITY, n) \
, ::boost::parameter::aux::void_reference() BOOST_PP_INTERCEPT \
) \
); \
}
/**/
#else // !defined(BOOST_NO_SFINAE)
#include <boost/parameter/are_tagged_arguments.hpp>
#include <boost/core/enable_if.hpp>
namespace boost { namespace parameter { namespace result_of {
template <
BOOST_PP_ENUM_BINARY_PARAMS(
BOOST_PP_INC(BOOST_PARAMETER_COMPOSE_MAX_ARITY)
, typename TaggedArg
, = void BOOST_PP_INTERCEPT
)
>
struct compose;
template <>
struct compose<>
{
typedef ::boost::parameter::aux::empty_arg_list type;
};
}}} // namespace boost::parameter::result_of
#define BOOST_PARAMETER_compose_arg_list_function_overload(z, n, prefix) \
namespace boost { namespace parameter { namespace result_of { \
template <BOOST_PP_ENUM_PARAMS_Z(z, n, typename prefix)> \
struct compose<BOOST_PP_ENUM_PARAMS_Z(z, n, prefix)> \
: ::boost::enable_if< \
::boost::parameter \
::are_tagged_arguments<BOOST_PP_ENUM_PARAMS_Z(z, n, prefix)> \
, BOOST_PARAMETER_compose_arg_list_type(z, n, prefix) \
> \
{ \
}; \
}}} \
namespace boost { namespace parameter { \
template <BOOST_PP_ENUM_PARAMS_Z(z, n, typename prefix)> \
inline BOOST_CONSTEXPR typename ::boost::parameter::result_of \
::compose<BOOST_PP_ENUM_PARAMS_Z(z, n, prefix)>::type \
compose(BOOST_PP_ENUM_BINARY_PARAMS_Z(z, n, prefix, const& a)) \
{ \
return BOOST_PARAMETER_compose_arg_list_type(z, n, prefix)( \
BOOST_PP_ENUM_PARAMS_Z(z, n, a) \
BOOST_PP_ENUM_TRAILING_PARAMS_Z( \
z \
, BOOST_PP_SUB(BOOST_PARAMETER_COMPOSE_MAX_ARITY, n) \
, ::boost::parameter::aux::void_reference() BOOST_PP_INTERCEPT \
) \
); \
} \
}}
/**/
#endif // BOOST_NO_SFINAE
#include <boost/preprocessor/repetition/repeat_from_to.hpp>
BOOST_PP_REPEAT_FROM_TO(
1
, BOOST_PP_INC(BOOST_PARAMETER_COMPOSE_MAX_ARITY)
, BOOST_PARAMETER_compose_arg_list_function_overload
, TaggedArg
)
#undef BOOST_PARAMETER_compose_arg_list_function_overload
#undef BOOST_PARAMETER_compose_arg_list_type
#undef BOOST_PARAMETER_compose_arg_list_type_prefix
#undef BOOST_PARAMETER_compose_arg_list_type_suffix
#endif // BOOST_PARAMETER_HAS_PERFECT_FORWARDING
#endif // include guard
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