mirror of
https://github.com/bolero-MURAKAMI/Sprout.git
synced 2024-12-25 21:35:41 +00:00
90 lines
2.6 KiB
C++
90 lines
2.6 KiB
C++
/*=============================================================================
|
|
Copyright (c) 2011-2014 Bolero MURAKAMI
|
|
https://github.com/bolero-MURAKAMI/Sprout
|
|
|
|
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 SPROUT_TUPLE_FUSED_HPP
|
|
#define SPROUT_TUPLE_FUSED_HPP
|
|
|
|
#include <utility>
|
|
#include <type_traits>
|
|
#include <sprout/config.hpp>
|
|
#include <sprout/index_tuple/metafunction.hpp>
|
|
#include <sprout/tuple/tuple/tuple.hpp>
|
|
#include <sprout/tuple/tuple/get.hpp>
|
|
#include <sprout/tuple/indexes.hpp>
|
|
#include <sprout/utility/forward.hpp>
|
|
|
|
namespace sprout {
|
|
namespace tuples {
|
|
//
|
|
// fused
|
|
//
|
|
template<typename F>
|
|
class fused {
|
|
public:
|
|
typedef F functor_type;
|
|
private:
|
|
template<typename Tuple, typename IndexTuple>
|
|
struct result_impl;
|
|
template<typename Tuple, sprout::index_t... Indexes>
|
|
struct result_impl<Tuple, sprout::index_tuple<Indexes...> > {
|
|
public:
|
|
typedef decltype(
|
|
std::declval<functor_type const&>()(
|
|
sprout::tuples::get<Indexes>(std::declval<Tuple>())...
|
|
)
|
|
) type;
|
|
};
|
|
public:
|
|
template<typename Tuple>
|
|
struct result
|
|
: public result_impl<
|
|
Tuple,
|
|
typename sprout::tuple_indexes<typename std::remove_reference<Tuple>::type>::type
|
|
>
|
|
{};
|
|
private:
|
|
functor_type f_;
|
|
private:
|
|
template<typename Result, typename Tuple, sprout::index_t... Indexes>
|
|
SPROUT_CONSTEXPR Result
|
|
call(Tuple&& t, sprout::index_tuple<Indexes...>) const {
|
|
return f_(sprout::tuples::get<Indexes>(SPROUT_FORWARD(Tuple, t))...);
|
|
}
|
|
public:
|
|
SPROUT_CONSTEXPR fused() SPROUT_DEFAULTED_DEFAULT_CONSTRUCTOR_DECL
|
|
fused(fused const&) = default;
|
|
explicit SPROUT_CONSTEXPR fused(F f)
|
|
: f_(f)
|
|
{}
|
|
SPROUT_CONSTEXPR functor_type functor() const {
|
|
return f_;
|
|
}
|
|
template<typename Tuple>
|
|
SPROUT_CONSTEXPR typename result<Tuple>::type
|
|
operator()(Tuple&& t) const {
|
|
return call<typename result<Tuple>::type>(
|
|
SPROUT_FORWARD(Tuple, t),
|
|
sprout::tuple_indexes<typename std::remove_reference<Tuple>::type>::make()
|
|
);
|
|
}
|
|
};
|
|
|
|
//
|
|
// make_fused
|
|
//
|
|
template<typename F>
|
|
inline SPROUT_CONSTEXPR sprout::tuples::fused<F>
|
|
make_fused(F const& f) {
|
|
return sprout::tuples::fused<F>(f);
|
|
}
|
|
} // namespace tuples
|
|
|
|
using sprout::tuples::fused;
|
|
using sprout::tuples::make_fused;
|
|
} // namespace sprout
|
|
|
|
#endif // #ifndef SPROUT_TUPLE_FUSED_HPP
|