mirror of
https://github.com/bolero-MURAKAMI/Sprout.git
synced 2024-12-27 21:45:42 +00:00
248 lines
9.5 KiB
C++
248 lines
9.5 KiB
C++
/*=============================================================================
|
|
Copyright (c) 2011-2018 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_FLEX_HPP
|
|
#define SPROUT_TUPLE_FLEX_HPP
|
|
|
|
#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/tuple/tuple_size.hpp>
|
|
#include <sprout/tuple/tuple/tuple_element.hpp>
|
|
#include <sprout/tuple/tuple/type_traits.hpp>
|
|
#include <sprout/tuple/flexibly_construct.hpp>
|
|
#include <sprout/tuple/indexes.hpp>
|
|
#include <sprout/utility/value_holder/value_holder.hpp>
|
|
#include <sprout/type_traits/identity.hpp>
|
|
#include <sprout/type_traits/common_decay.hpp>
|
|
|
|
namespace sprout {
|
|
namespace tuples {
|
|
//
|
|
// flex_tuple
|
|
//
|
|
template<typename... Types>
|
|
class flex_tuple {
|
|
public:
|
|
typedef sprout::tuples::tuple<Types...> tuple_type;
|
|
private:
|
|
typedef sprout::value_holder<tuple_type const&> holder_type;
|
|
private:
|
|
holder_type holder_;
|
|
public:
|
|
flex_tuple(flex_tuple const&) = default;
|
|
flex_tuple(flex_tuple&&) = default;
|
|
SPROUT_CONSTEXPR flex_tuple(tuple_type const& t)
|
|
: holder_(t)
|
|
{}
|
|
SPROUT_CONSTEXPR operator tuple_type const&() const {
|
|
return holder_.get();
|
|
}
|
|
template<typename... UTypes>
|
|
SPROUT_CONSTEXPR operator sprout::tuples::tuple<UTypes...>() const {
|
|
return sprout::tuples::tuple<UTypes...>(sprout::tuples::flexibly_construct, holder_.get());
|
|
}
|
|
};
|
|
//
|
|
// flex
|
|
//
|
|
template<typename T>
|
|
inline SPROUT_CONSTEXPR T const&
|
|
flex(T const& t) {
|
|
return t;
|
|
}
|
|
template<typename... Types>
|
|
inline SPROUT_CONSTEXPR sprout::tuples::flex_tuple<Types...>
|
|
flex(sprout::tuples::tuple<Types...> const& t) {
|
|
return sprout::tuples::flex_tuple<Types...>(t);
|
|
}
|
|
template<typename To, typename... Types>
|
|
inline SPROUT_CONSTEXPR To
|
|
flex(sprout::tuples::tuple<Types...> const& t) {
|
|
return sprout::tuples::flex(t);
|
|
}
|
|
|
|
//
|
|
// recursive_flex_tuple
|
|
//
|
|
template<typename... Types>
|
|
class recursive_flex_tuple
|
|
: public sprout::tuples::flex_tuple<Types...>
|
|
{
|
|
private:
|
|
typedef sprout::tuples::flex_tuple<Types...> base_type;
|
|
private:
|
|
template<typename... UTypes, sprout::index_t... Indexes>
|
|
static SPROUT_CONSTEXPR sprout::tuples::tuple<UTypes...>
|
|
implicit_conversion_impl(typename base_type::tuple_type const& t, sprout::index_tuple<Indexes...>) {
|
|
return sprout::tuples::tuple<UTypes...>(
|
|
sprout::tuples::flexibly_construct,
|
|
sprout::tuples::flex(sprout::tuples::get<Indexes>(t))...
|
|
);
|
|
}
|
|
public:
|
|
recursive_flex_tuple(recursive_flex_tuple const&) = default;
|
|
recursive_flex_tuple(recursive_flex_tuple&&) = default;
|
|
SPROUT_CONSTEXPR recursive_flex_tuple(typename base_type::tuple_type const& t)
|
|
: base_type(t)
|
|
{}
|
|
template<typename... UTypes>
|
|
SPROUT_CONSTEXPR operator sprout::tuples::tuple<UTypes...>() const {
|
|
return implicit_conversion_impl<UTypes...>(*this, sprout::make_index_tuple<sizeof...(Types)>::make());
|
|
}
|
|
};
|
|
//
|
|
// recursive_flex
|
|
//
|
|
template<typename T>
|
|
inline SPROUT_CONSTEXPR T const&
|
|
recursive_flex(T const& t) {
|
|
return t;
|
|
}
|
|
template<typename... Types>
|
|
inline SPROUT_CONSTEXPR sprout::tuples::recursive_flex_tuple<Types...>
|
|
recursive_flex(sprout::tuples::tuple<Types...> const& t) {
|
|
return sprout::tuples::recursive_flex_tuple<Types...>(t);
|
|
}
|
|
template<typename To, typename... Types>
|
|
inline SPROUT_CONSTEXPR To
|
|
recursive_flex(sprout::tuples::tuple<Types...> const& t) {
|
|
return sprout::tuples::recursive_flex(t);
|
|
}
|
|
|
|
//
|
|
// common_flex_type
|
|
//
|
|
template<typename... Types>
|
|
struct common_flex_type;
|
|
template<typename T>
|
|
struct common_flex_type<T>
|
|
: public sprout::common_decay<T>
|
|
{};
|
|
namespace detail {
|
|
template<typename T, typename U, typename IndexTuple>
|
|
struct common_flex_type_impl_2;
|
|
template<typename T, typename U, sprout::index_t... Indexes>
|
|
struct common_flex_type_impl_2<T, U, sprout::index_tuple<Indexes...> >
|
|
: public sprout::identity<
|
|
sprout::tuples::tuple<
|
|
typename sprout::tuples::common_flex_type<
|
|
typename sprout::tuples::tuple_element<Indexes, T>::type,
|
|
typename sprout::tuples::tuple_element<Indexes, U>::type
|
|
>::type...
|
|
>
|
|
>
|
|
{};
|
|
|
|
template<typename T, typename U, typename Enable = void>
|
|
struct common_flex_type_impl_1;
|
|
template<typename T, typename U>
|
|
struct common_flex_type_impl_1<T, U, typename std::enable_if<(sprout::tuples::tuple_size<T>::value < sprout::tuples::tuple_size<U>::value)>::type>
|
|
: public sprout::tuples::common_flex_type<U>
|
|
{};
|
|
template<typename T, typename U>
|
|
struct common_flex_type_impl_1<T, U, typename std::enable_if<(sprout::tuples::tuple_size<T>::value > sprout::tuples::tuple_size<U>::value)>::type>
|
|
: public sprout::tuples::common_flex_type<T>
|
|
{};
|
|
template<typename T, typename U>
|
|
struct common_flex_type_impl_1<T, U, typename std::enable_if<(sprout::tuples::tuple_size<T>::value == sprout::tuples::tuple_size<U>::value)>::type>
|
|
: public sprout::tuples::detail::common_flex_type_impl_2<T, U, typename sprout::tuples::tuple_indexes<T>::type>
|
|
{};
|
|
|
|
template<typename T, typename U, typename Enable = void>
|
|
struct common_flex_type_impl;
|
|
template<typename T, typename U>
|
|
struct common_flex_type_impl<T, U, typename std::enable_if<(sprout::tuples::is_tuple<T>::value && sprout::tuples::is_tuple<U>::value)>::type>
|
|
: public sprout::tuples::detail::common_flex_type_impl_1<T, U>
|
|
{};
|
|
template<typename T, typename U>
|
|
struct common_flex_type_impl<T, U, typename std::enable_if<!(sprout::tuples::is_tuple<T>::value && sprout::tuples::is_tuple<U>::value)>::type>
|
|
: public sprout::common_decay<T, U>
|
|
{};
|
|
} // namespace detail
|
|
template<typename T, typename U>
|
|
struct common_flex_type<T, U>
|
|
: public sprout::tuples::detail::common_flex_type_impl<T, U>
|
|
{};
|
|
template<typename T, typename U, typename... Tail>
|
|
struct common_flex_type<T, U, Tail...>
|
|
: public sprout::tuples::common_flex_type<typename sprout::tuples::common_flex_type<T, U>::type, Tail...>
|
|
{};
|
|
|
|
//
|
|
// common_recursive_flex_type
|
|
//
|
|
template<typename... Types>
|
|
struct common_recursive_flex_type;
|
|
template<typename T>
|
|
struct common_recursive_flex_type<T>
|
|
: public sprout::tuples::common_flex_type<T>
|
|
{};
|
|
namespace detail {
|
|
template<typename T, typename U, typename IndexTuple>
|
|
struct common_recursive_flex_type_impl_2;
|
|
template<typename T, typename U, sprout::index_t... Indexes>
|
|
struct common_recursive_flex_type_impl_2<T, U, sprout::index_tuple<Indexes...> >
|
|
: public sprout::identity<
|
|
sprout::tuples::tuple<
|
|
typename sprout::tuples::common_recursive_flex_type<
|
|
typename sprout::tuples::tuple_element<Indexes, T>::type,
|
|
typename sprout::tuples::tuple_element<Indexes, U>::type
|
|
>::type...
|
|
>
|
|
>
|
|
{};
|
|
|
|
template<typename T, typename U, typename Enable = void>
|
|
struct common_recursive_flex_type_impl_1;
|
|
template<typename T, typename U>
|
|
struct common_recursive_flex_type_impl_1<T, U, typename std::enable_if<(sprout::tuples::tuple_size<T>::value < sprout::tuples::tuple_size<U>::value)>::type>
|
|
: public sprout::tuples::common_recursive_flex_type<U>
|
|
{};
|
|
template<typename T, typename U>
|
|
struct common_recursive_flex_type_impl_1<T, U, typename std::enable_if<(sprout::tuples::tuple_size<T>::value > sprout::tuples::tuple_size<U>::value)>::type>
|
|
: public sprout::tuples::common_recursive_flex_type<T>
|
|
{};
|
|
template<typename T, typename U>
|
|
struct common_recursive_flex_type_impl_1<T, U, typename std::enable_if<(sprout::tuples::tuple_size<T>::value == sprout::tuples::tuple_size<U>::value)>::type>
|
|
: public sprout::tuples::detail::common_recursive_flex_type_impl_2<T, U, typename sprout::tuples::tuple_indexes<T>::type>
|
|
{};
|
|
|
|
template<typename T, typename U, typename Enable = void>
|
|
struct common_recursive_flex_type_impl;
|
|
template<typename T, typename U>
|
|
struct common_recursive_flex_type_impl<T, U, typename std::enable_if<(sprout::tuples::is_tuple<T>::value && sprout::tuples::is_tuple<U>::value)>::type>
|
|
: public sprout::tuples::detail::common_recursive_flex_type_impl_1<T, U>
|
|
{};
|
|
template<typename T, typename U>
|
|
struct common_recursive_flex_type_impl<T, U, typename std::enable_if<!(sprout::tuples::is_tuple<T>::value && sprout::tuples::is_tuple<U>::value)>::type>
|
|
: public sprout::tuples::common_flex_type<T, U>
|
|
{};
|
|
} // namespace detail
|
|
template<typename T, typename U>
|
|
struct common_recursive_flex_type<T, U>
|
|
: public sprout::tuples::detail::common_recursive_flex_type_impl<T, U>
|
|
{};
|
|
template<typename T, typename U, typename... Tail>
|
|
struct common_recursive_flex_type<T, U, Tail...>
|
|
: public sprout::tuples::common_recursive_flex_type<typename sprout::tuples::common_recursive_flex_type<T, U>::type, Tail...>
|
|
{};
|
|
} // namespace tuples
|
|
|
|
using sprout::tuples::flex_tuple;
|
|
using sprout::tuples::flex;
|
|
|
|
using sprout::tuples::recursive_flex_tuple;
|
|
using sprout::tuples::recursive_flex;
|
|
|
|
using sprout::tuples::common_flex_type;
|
|
using sprout::tuples::common_recursive_flex_type;
|
|
} // namespace sprout
|
|
|
|
#endif // #ifndef SPROUT_TUPLE_FLEX_HPP
|