mirror of
https://github.com/bolero-MURAKAMI/Sprout.git
synced 2024-11-14 10:39:05 +00:00
70 lines
1.9 KiB
C++
70 lines
1.9 KiB
C++
#ifndef SPROUT_TUPLE_OPERATION_PUSH_FRONT_HPP
|
|
#define SPROUT_TUPLE_OPERATION_PUSH_FRONT_HPP
|
|
|
|
#include <cstddef>
|
|
#include <sprout/config.hpp>
|
|
#include <sprout/index_tuple.hpp>
|
|
#include <sprout/tuple/traits.hpp>
|
|
#include <sprout/tuple/functions.hpp>
|
|
|
|
namespace sprout {
|
|
namespace tuples {
|
|
namespace result_of {
|
|
//
|
|
// push_front
|
|
//
|
|
template<typename Tuple, typename T>
|
|
struct push_front {
|
|
private:
|
|
template<typename IndexTuple>
|
|
struct apply_impl;
|
|
template<std::ptrdiff_t... Indexes>
|
|
struct apply_impl<sprout::index_tuple<Indexes...>>
|
|
: public sprout::tuples::rebind_types<
|
|
Tuple
|
|
>::template apply<
|
|
T,
|
|
typename sprout::tuples::tuple_element<Indexes, Tuple>::type...
|
|
>
|
|
{};
|
|
public:
|
|
typedef typename apply_impl<
|
|
typename sprout::index_range<0, sprout::tuples::tuple_size<Tuple>::value>::type
|
|
>::type type;
|
|
};
|
|
} // namespace result_of
|
|
|
|
namespace detail {
|
|
template<typename Result, typename Tuple, typename T, std::ptrdiff_t... Indexes>
|
|
SPROUT_CONSTEXPR inline Result push_front_impl(
|
|
Tuple const& t,
|
|
T const& v,
|
|
sprout::index_tuple<Indexes...>
|
|
)
|
|
{
|
|
return sprout::tuples::remake_clone<Result>(
|
|
t,
|
|
v,
|
|
sprout::tuples::get<Indexes>(t)...
|
|
);
|
|
}
|
|
} // namespace detail
|
|
//
|
|
// push_front
|
|
//
|
|
template<typename Tuple, typename T>
|
|
SPROUT_CONSTEXPR inline typename sprout::tuples::result_of::push_front<Tuple, T>::type push_front(
|
|
Tuple const& t,
|
|
T const& v
|
|
)
|
|
{
|
|
return sprout::tuples::detail::push_front_impl<typename sprout::tuples::result_of::push_front<Tuple, T>::type>(
|
|
t,
|
|
v,
|
|
typename sprout::index_range<0, sprout::tuples::tuple_size<Tuple>::value>::type()
|
|
);
|
|
}
|
|
} // namespace tuples
|
|
} // namespace sprout
|
|
|
|
#endif // #ifndef SPROUT_TUPLE_OPERATION_PUSH_FRONT_HPP
|