mirror of
https://github.com/bolero-MURAKAMI/Sprout
synced 2024-11-12 21:09:01 +00:00
459 lines
16 KiB
C++
459 lines
16 KiB
C++
/*=============================================================================
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Copyright (c) 2011-2014 Bolero MURAKAMI
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https://github.com/bolero-MURAKAMI/Sprout
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Distributed under the Boost Software License, Version 1.0. (See accompanying
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file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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=============================================================================*/
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#ifndef SPROUT_COMPRESSED_PAIR_HPP
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#define SPROUT_COMPRESSED_PAIR_HPP
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#include <type_traits>
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#include <sprout/config.hpp>
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#include <sprout/utility/swap.hpp>
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#include <sprout/detail/call_traits.hpp>
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#include <sprout/type_traits/integral_constant.hpp>
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namespace sprout {
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namespace detail {
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template<typename T1, typename T2, bool IsSame, bool FirstEmpty, bool SecondEmpty>
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struct compressed_pair_switch;
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template<typename T1, typename T2>
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struct compressed_pair_switch<T1, T2, false, false, false>
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: public sprout::integral_constant<int, 0>
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{};
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template<typename T1, typename T2>
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struct compressed_pair_switch<T1, T2, false, true, false>
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: public sprout::integral_constant<int, 1>
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{};
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template<typename T1, typename T2>
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struct compressed_pair_switch<T1, T2, false, false, true>
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: public sprout::integral_constant<int, 2>
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{};
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template<typename T1, typename T2>
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struct compressed_pair_switch<T1, T2, false, true, true>
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: public sprout::integral_constant<int, 3>
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{};
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template<typename T1, typename T2>
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struct compressed_pair_switch<T1, T2, true, true, true>
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: public sprout::integral_constant<int, 4>
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{};
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template<typename T1, typename T2>
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struct compressed_pair_switch<T1, T2, true, false, false>
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: public sprout::integral_constant<int, 5>
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{};
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template<typename T1, typename T2, int Version>
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class compressed_pair_impl;
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template<typename T1, typename T2>
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class compressed_pair_impl<T1, T2, 0> {
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public:
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typedef T1 first_type;
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typedef T2 second_type;
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typedef typename sprout::detail::call_traits<first_type>::param_type first_param_type;
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typedef typename sprout::detail::call_traits<second_type>::param_type second_param_type;
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typedef typename sprout::detail::call_traits<first_type>::reference first_reference;
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typedef typename sprout::detail::call_traits<second_type>::reference second_reference;
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typedef typename sprout::detail::call_traits<first_type>::const_reference first_const_reference;
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typedef typename sprout::detail::call_traits<second_type>::const_reference second_const_reference;
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private:
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first_type first_;
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second_type second_;
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public:
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SPROUT_CONSTEXPR compressed_pair_impl()
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: first_()
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, second_()
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{}
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SPROUT_CONSTEXPR compressed_pair_impl(first_param_type x, second_param_type y)
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: first_(x)
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, second_(y)
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{}
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SPROUT_CONSTEXPR compressed_pair_impl(first_param_type x)
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: first_(x)
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{}
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SPROUT_CONSTEXPR compressed_pair_impl(second_param_type y)
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: second_(y)
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{}
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SPROUT_CXX14_CONSTEXPR first_reference first() {
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return first_;
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}
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SPROUT_CONSTEXPR first_const_reference first() const {
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return first_;
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}
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SPROUT_CXX14_CONSTEXPR second_reference second() {
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return second_;
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}
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SPROUT_CONSTEXPR second_const_reference second() const {
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return second_;
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}
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SPROUT_CXX14_CONSTEXPR void swap(compressed_pair_impl& other)
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SPROUT_NOEXCEPT_IF(
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SPROUT_NOEXCEPT_EXPR(sprout::swap(first_, other.first_))
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&& SPROUT_NOEXCEPT_EXPR(sprout::swap(second_, other.second_))
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)
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{
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sprout::swap(first_, other.first_);
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sprout::swap(second_, other.second_);
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}
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};
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template<typename T1, typename T2>
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class compressed_pair_impl<T1, T2, 1>
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: protected std::remove_cv<T1>::type
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{
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public:
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typedef T1 first_type;
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typedef T2 second_type;
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typedef typename sprout::detail::call_traits<first_type>::param_type first_param_type;
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typedef typename sprout::detail::call_traits<second_type>::param_type second_param_type;
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typedef typename sprout::detail::call_traits<first_type>::reference first_reference;
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typedef typename sprout::detail::call_traits<second_type>::reference second_reference;
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typedef typename sprout::detail::call_traits<first_type>::const_reference first_const_reference;
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typedef typename sprout::detail::call_traits<second_type>::const_reference second_const_reference;
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private:
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second_type second_;
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public:
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SPROUT_CONSTEXPR compressed_pair_impl()
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: second_()
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{}
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SPROUT_CONSTEXPR compressed_pair_impl(first_param_type x, second_param_type y)
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: first_type(x)
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, second_(y)
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{}
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SPROUT_CONSTEXPR compressed_pair_impl(first_param_type x)
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: first_type(x)
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{}
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SPROUT_CONSTEXPR compressed_pair_impl(second_param_type y)
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: second_(y)
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{}
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SPROUT_CXX14_CONSTEXPR first_reference first() {
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return *this;
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}
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SPROUT_CONSTEXPR first_const_reference first() const {
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return *this;
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}
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SPROUT_CXX14_CONSTEXPR second_reference second() {
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return second_;
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}
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SPROUT_CONSTEXPR second_const_reference second() const {
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return second_;
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}
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SPROUT_CXX14_CONSTEXPR void swap(compressed_pair_impl& other)
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SPROUT_NOEXCEPT_IF_EXPR(sprout::swap(second_, other.second_))
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{
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sprout::swap(second_, other.second_);
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}
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};
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template<typename T1, typename T2>
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class compressed_pair_impl<T1, T2, 2>
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: protected std::remove_cv<T1>::type
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{
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public:
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typedef T1 first_type;
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typedef T2 second_type;
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typedef typename sprout::detail::call_traits<first_type>::param_type first_param_type;
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typedef typename sprout::detail::call_traits<second_type>::param_type second_param_type;
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typedef typename sprout::detail::call_traits<first_type>::reference first_reference;
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typedef typename sprout::detail::call_traits<second_type>::reference second_reference;
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typedef typename sprout::detail::call_traits<first_type>::const_reference first_const_reference;
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typedef typename sprout::detail::call_traits<second_type>::const_reference second_const_reference;
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private:
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first_type first_;
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public:
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SPROUT_CONSTEXPR compressed_pair_impl()
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: first_()
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, second_type()
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{}
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SPROUT_CONSTEXPR compressed_pair_impl(first_param_type x, second_param_type y)
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: first_(x)
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, second_type(y)
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{}
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SPROUT_CONSTEXPR compressed_pair_impl(first_param_type x)
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: first_(x)
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{}
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SPROUT_CONSTEXPR compressed_pair_impl(second_param_type y)
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: second_type(y)
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{}
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SPROUT_CXX14_CONSTEXPR first_reference first() {
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return first_;
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}
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SPROUT_CONSTEXPR first_const_reference first() const {
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return first_;
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}
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SPROUT_CXX14_CONSTEXPR second_reference second() {
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return *this;
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}
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SPROUT_CONSTEXPR second_const_reference second() const {
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return *this;
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}
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SPROUT_CXX14_CONSTEXPR void swap(compressed_pair_impl& other)
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SPROUT_NOEXCEPT_IF_EXPR(sprout::swap(first_, other.first_))
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{
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sprout::swap(first_, other.first_);
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}
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};
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template<typename T1, typename T2>
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class compressed_pair_impl<T1, T2, 3>
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: protected std::remove_cv<T1>::type
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, protected std::remove_cv<T2>::type
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{
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public:
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typedef T1 first_type;
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typedef T2 second_type;
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typedef typename sprout::detail::call_traits<first_type>::param_type first_param_type;
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typedef typename sprout::detail::call_traits<second_type>::param_type second_param_type;
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typedef typename sprout::detail::call_traits<first_type>::reference first_reference;
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typedef typename sprout::detail::call_traits<second_type>::reference second_reference;
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typedef typename sprout::detail::call_traits<first_type>::const_reference first_const_reference;
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typedef typename sprout::detail::call_traits<second_type>::const_reference second_const_reference;
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public:
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SPROUT_CONSTEXPR compressed_pair_impl()
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: first_type()
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, second_type()
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{}
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SPROUT_CONSTEXPR compressed_pair_impl(first_param_type x, second_param_type y)
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: first_type(x)
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, second_type(y)
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{}
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SPROUT_CONSTEXPR compressed_pair_impl(first_param_type x)
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: first_type(x)
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{}
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SPROUT_CONSTEXPR compressed_pair_impl(second_param_type y)
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: second_type(y)
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{}
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SPROUT_CXX14_CONSTEXPR first_reference first() {
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return *this;
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}
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SPROUT_CONSTEXPR first_const_reference first() const {
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return *this;
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}
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SPROUT_CXX14_CONSTEXPR second_reference second() {
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return *this;
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}
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SPROUT_CONSTEXPR second_const_reference second() const {
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return *this;
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}
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SPROUT_CXX14_CONSTEXPR void swap(compressed_pair_impl&) {}
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};
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template<typename T1, typename T2>
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class compressed_pair_impl<T1, T2, 4>
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: protected std::remove_cv<T1>::type
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{
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public:
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typedef T1 first_type;
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typedef T2 second_type;
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typedef typename sprout::detail::call_traits<first_type>::param_type first_param_type;
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typedef typename sprout::detail::call_traits<second_type>::param_type second_param_type;
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typedef typename sprout::detail::call_traits<first_type>::reference first_reference;
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typedef typename sprout::detail::call_traits<second_type>::reference second_reference;
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typedef typename sprout::detail::call_traits<first_type>::const_reference first_const_reference;
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typedef typename sprout::detail::call_traits<second_type>::const_reference second_const_reference;
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private:
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second_type second_;
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public:
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SPROUT_CONSTEXPR compressed_pair_impl()
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: first_type()
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, second_()
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{}
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SPROUT_CONSTEXPR compressed_pair_impl(first_param_type x, second_param_type y)
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: first_type(x)
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, second_(y)
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{}
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SPROUT_CONSTEXPR compressed_pair_impl(first_param_type x)
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: first_type(x)
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, second_(x)
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{}
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SPROUT_CXX14_CONSTEXPR first_reference first() {
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return *this;
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}
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SPROUT_CONSTEXPR first_const_reference first() const {
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return *this;
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}
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SPROUT_CXX14_CONSTEXPR second_reference second() {
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return second_;
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}
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SPROUT_CONSTEXPR second_const_reference second() const {
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return second_;
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}
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SPROUT_CXX14_CONSTEXPR void swap(compressed_pair_impl&) {}
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};
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template<typename T1, typename T2>
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class compressed_pair_impl<T1, T2, 5>
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{
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public:
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typedef T1 first_type;
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typedef T2 second_type;
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typedef typename sprout::detail::call_traits<first_type>::param_type first_param_type;
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typedef typename sprout::detail::call_traits<second_type>::param_type second_param_type;
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typedef typename sprout::detail::call_traits<first_type>::reference first_reference;
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typedef typename sprout::detail::call_traits<second_type>::reference second_reference;
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typedef typename sprout::detail::call_traits<first_type>::const_reference first_const_reference;
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typedef typename sprout::detail::call_traits<second_type>::const_reference second_const_reference;
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private:
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first_type first_;
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second_type second_;
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public:
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SPROUT_CONSTEXPR compressed_pair_impl()
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: first_()
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, second_()
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{}
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SPROUT_CONSTEXPR compressed_pair_impl(first_param_type x, second_param_type y)
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: first_(x)
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, second_(y)
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{}
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SPROUT_CONSTEXPR compressed_pair_impl(first_param_type x)
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: first_(x)
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, second_(x)
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{}
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SPROUT_CXX14_CONSTEXPR first_reference first() {
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return first_;
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}
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SPROUT_CONSTEXPR first_const_reference first() const {
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return first_;
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}
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SPROUT_CXX14_CONSTEXPR second_reference second() {
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return second_;
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}
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SPROUT_CONSTEXPR second_const_reference second() const {
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return second_;
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}
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SPROUT_CXX14_CONSTEXPR void swap(compressed_pair_impl& other)
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SPROUT_NOEXCEPT_IF(
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SPROUT_NOEXCEPT_EXPR(sprout::swap(first_, other.first_))
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&& SPROUT_NOEXCEPT_EXPR(sprout::swap(second_, other.second_))
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)
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{
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sprout::swap(first_, other.first_);
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sprout::swap(second_, other.second_);
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}
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};
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} // namespace detail
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//
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// compressed_pair
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//
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template<typename T1, typename T2>
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class compressed_pair
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: private sprout::detail::compressed_pair_impl<
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T1, T2,
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sprout::detail::compressed_pair_switch<
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T1, T2,
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std::is_same<typename std::remove_cv<T1>::type, typename std::remove_cv<T2>::type>::value,
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std::is_empty<T1>::value, std::is_empty<T2>::value
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>::value
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>
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{
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private:
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typedef sprout::detail::compressed_pair_impl<
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T1, T2,
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sprout::detail::compressed_pair_switch<
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T1, T2,
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std::is_same<typename std::remove_cv<T1>::type, typename std::remove_cv<T2>::type>::value,
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std::is_empty<T1>::value, std::is_empty<T2>::value
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>::value
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> base_type;
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public:
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typedef T1 first_type;
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typedef T2 second_type;
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typedef typename sprout::detail::call_traits<first_type>::param_type first_param_type;
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typedef typename sprout::detail::call_traits<second_type>::param_type second_param_type;
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typedef typename sprout::detail::call_traits<first_type>::reference first_reference;
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typedef typename sprout::detail::call_traits<second_type>::reference second_reference;
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typedef typename sprout::detail::call_traits<first_type>::const_reference first_const_reference;
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typedef typename sprout::detail::call_traits<second_type>::const_reference second_const_reference;
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public:
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SPROUT_CONSTEXPR compressed_pair()
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: base_type()
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{}
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SPROUT_CONSTEXPR compressed_pair(first_param_type x, second_param_type y)
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: base_type(x, y)
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{}
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explicit SPROUT_CONSTEXPR compressed_pair(first_param_type x)
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: base_type(x)
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{}
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explicit SPROUT_CONSTEXPR compressed_pair(second_param_type y)
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: base_type(y)
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{}
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SPROUT_CXX14_CONSTEXPR first_reference first() {
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return base_type::first();
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}
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SPROUT_CONSTEXPR first_const_reference first() const {
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return base_type::first();
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}
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SPROUT_CXX14_CONSTEXPR second_reference second() {
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return base_type::second();
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}
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SPROUT_CONSTEXPR second_const_reference second() const {
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return base_type::second();
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}
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SPROUT_CXX14_CONSTEXPR void swap(compressed_pair& other) {
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base_type::swap(other);
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}
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};
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template<typename T>
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class compressed_pair<T, T>
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: private sprout::detail::compressed_pair_impl<
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T, T,
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sprout::detail::compressed_pair_switch<
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T, T,
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std::is_same<typename std::remove_cv<T>::type, typename std::remove_cv<T>::type>::value,
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std::is_empty<T>::value, std::is_empty<T>::value
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>::value
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>
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{
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private:
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typedef sprout::detail::compressed_pair_impl<
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T, T,
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sprout::detail::compressed_pair_switch<
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T, T,
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std::is_same<typename std::remove_cv<T>::type, typename std::remove_cv<T>::type>::value,
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std::is_empty<T>::value, std::is_empty<T>::value
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>::value
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> base_type;
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public:
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typedef T first_type;
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typedef T second_type;
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typedef typename sprout::detail::call_traits<first_type>::param_type first_param_type;
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typedef typename sprout::detail::call_traits<second_type>::param_type second_param_type;
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typedef typename sprout::detail::call_traits<first_type>::reference first_reference;
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typedef typename sprout::detail::call_traits<second_type>::reference second_reference;
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typedef typename sprout::detail::call_traits<first_type>::const_reference first_const_reference;
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typedef typename sprout::detail::call_traits<second_type>::const_reference second_const_reference;
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public:
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SPROUT_CONSTEXPR compressed_pair()
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: base_type()
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{}
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SPROUT_CONSTEXPR compressed_pair(first_param_type x, second_param_type y)
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: base_type(x, y)
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{}
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explicit SPROUT_CONSTEXPR compressed_pair(first_param_type x)
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: base_type(x)
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{}
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SPROUT_CXX14_CONSTEXPR first_reference first() {
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return base_type::first();
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}
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SPROUT_CONSTEXPR first_const_reference first() const {
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return base_type::first();
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}
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SPROUT_CXX14_CONSTEXPR second_reference second() {
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return base_type::second();
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}
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SPROUT_CONSTEXPR second_const_reference second() const {
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return base_type::second();
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}
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SPROUT_CXX14_CONSTEXPR void swap(compressed_pair& other) {
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base_type::swap(other);
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}
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};
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//
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// swap
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//
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template<typename T1, typename T2>
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inline SPROUT_CXX14_CONSTEXPR void
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swap(sprout::compressed_pair<T1, T2>& lhs, sprout::compressed_pair<T1, T2>& rhs)
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SPROUT_NOEXCEPT_IF_EXPR(lhs.swap(rhs))
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{
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lhs.swap(rhs);
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}
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} // namespace sprout
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#endif // #ifndef SPROUT_COMPRESSED_PAIR_HPP
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