From 04ab1a3420b46af046a898ee5510e0d9b25ed24c Mon Sep 17 00:00:00 2001
From: LaG1924 <12997935+LaG1924@users.noreply.github.com>
Date: Sun, 27 Aug 2017 20:24:28 +0500
Subject: 2017-08-27
---
depedencies/include/mpark/config.hpp | 69 --
depedencies/include/mpark/in_place.hpp | 35 -
depedencies/include/mpark/lib.hpp | 453 --------
depedencies/include/mpark/variant.hpp | 1827 --------------------------------
4 files changed, 2384 deletions(-)
delete mode 100644 depedencies/include/mpark/config.hpp
delete mode 100644 depedencies/include/mpark/in_place.hpp
delete mode 100644 depedencies/include/mpark/lib.hpp
delete mode 100644 depedencies/include/mpark/variant.hpp
(limited to 'depedencies/include')
diff --git a/depedencies/include/mpark/config.hpp b/depedencies/include/mpark/config.hpp
deleted file mode 100644
index b5706b2..0000000
--- a/depedencies/include/mpark/config.hpp
+++ /dev/null
@@ -1,69 +0,0 @@
-// MPark.Variant
-//
-// Copyright Michael Park, 2015-2017
-//
-// Distributed under the Boost Software License, Version 1.0.
-// (See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt)
-
-#ifndef MPARK_CONFIG_HPP
-#define MPARK_CONFIG_HPP
-
-// MSVC 2015 Update 3.
-#if __cplusplus < 201103L && (!defined(_MSC_VER) || _MSC_FULL_VER < 190024215)
-#error "MPark.Variant requires C++11 support."
-#endif
-
-#ifndef __has_builtin
-#define __has_builtin(x) 0
-#endif
-
-#ifndef __has_include
-#define __has_include(x) 0
-#endif
-
-#ifndef __has_feature
-#define __has_feature(x) 0
-#endif
-
-#if __has_builtin(__builtin_addressof) || \
- (defined(__GNUC__) && __GNUC__ >= 7) || defined(_MSC_VER)
-#define MPARK_BUILTIN_ADDRESSOF
-#endif
-
-#if __has_builtin(__type_pack_element)
-#define MPARK_TYPE_PACK_ELEMENT
-#endif
-
-#if defined(__cpp_constexpr) && __cpp_constexpr >= 201304
-#define MPARK_CPP14_CONSTEXPR
-#endif
-
-#if __has_feature(cxx_exceptions) || defined(__cpp_exceptions)
-#define MPARK_EXCEPTIONS
-#endif
-
-#if defined(__cpp_generic_lambdas) || defined(_MSC_VER)
-#define MPARK_GENERIC_LAMBDAS
-#endif
-
-#if defined(__cpp_lib_integer_sequence)
-#define MPARK_INTEGER_SEQUENCE
-#endif
-
-#if defined(__cpp_return_type_deduction) || defined(_MSC_VER)
-#define MPARK_RETURN_TYPE_DEDUCTION
-#endif
-
-#if defined(__cpp_lib_transparent_operators) || defined(_MSC_VER)
-#define MPARK_TRANSPARENT_OPERATORS
-#endif
-
-#if defined(__cpp_variable_templates) || defined(_MSC_VER)
-#define MPARK_VARIABLE_TEMPLATES
-#endif
-
-#if !defined(__GLIBCXX__) || __has_include(<codecvt>) // >= libstdc++-5
-#define MPARK_TRIVIALITY_TYPE_TRAITS
-#endif
-
-#endif // MPARK_CONFIG_HPP
diff --git a/depedencies/include/mpark/in_place.hpp b/depedencies/include/mpark/in_place.hpp
deleted file mode 100644
index 56cae13..0000000
--- a/depedencies/include/mpark/in_place.hpp
+++ /dev/null
@@ -1,35 +0,0 @@
-// MPark.Variant
-//
-// Copyright Michael Park, 2015-2017
-//
-// Distributed under the Boost Software License, Version 1.0.
-// (See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt)
-
-#ifndef MPARK_IN_PLACE_HPP
-#define MPARK_IN_PLACE_HPP
-
-#include <cstddef>
-
-#include "config.hpp"
-
-namespace mpark {
-
- struct in_place_t { explicit in_place_t() = default; };
-
- template <std::size_t I>
- struct in_place_index_t { explicit in_place_index_t() = default; };
-
- template <typename T>
- struct in_place_type_t { explicit in_place_type_t() = default; };
-
-#ifdef MPARK_VARIABLE_TEMPLATES
- constexpr in_place_t in_place{};
-
- template <std::size_t I> constexpr in_place_index_t<I> in_place_index{};
-
- template <typename T> constexpr in_place_type_t<T> in_place_type{};
-#endif
-
-} // namespace mpark
-
-#endif // MPARK_IN_PLACE_HPP
diff --git a/depedencies/include/mpark/lib.hpp b/depedencies/include/mpark/lib.hpp
deleted file mode 100644
index bba58d8..0000000
--- a/depedencies/include/mpark/lib.hpp
+++ /dev/null
@@ -1,453 +0,0 @@
-// MPark.Variant
-//
-// Copyright Michael Park, 2015-2017
-//
-// Distributed under the Boost Software License, Version 1.0.
-// (See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt)
-
-#ifndef MPARK_LIB_HPP
-#define MPARK_LIB_HPP
-
-#include <memory>
-#include <functional>
-#include <type_traits>
-#include <utility>
-
-#include "config.hpp"
-
-#define RETURN(...) \
- noexcept(noexcept(__VA_ARGS__)) -> decltype(__VA_ARGS__) { \
- return __VA_ARGS__; \
- }
-
-namespace mpark {
- namespace lib {
- template <typename T>
- struct identity { using type = T; };
-
- inline namespace cpp14 {
- template <typename T, std::size_t N>
- struct array {
- constexpr const T &operator[](std::size_t index) const {
- return data[index];
- }
-
- T data[N == 0 ? 1 : N];
- };
-
- template <typename T>
- using add_pointer_t = typename std::add_pointer<T>::type;
-
- template <typename... Ts>
- using common_type_t = typename std::common_type<Ts...>::type;
-
- template <typename T>
- using decay_t = typename std::decay<T>::type;
-
- template <bool B, typename T = void>
- using enable_if_t = typename std::enable_if<B, T>::type;
-
- template <typename T>
- using remove_const_t = typename std::remove_const<T>::type;
-
- template <typename T>
- using remove_reference_t = typename std::remove_reference<T>::type;
-
- template <typename T>
- inline constexpr T &&forward(remove_reference_t<T> &t) noexcept {
- return static_cast<T &&>(t);
- }
-
- template <typename T>
- inline constexpr T &&forward(remove_reference_t<T> &&t) noexcept {
- static_assert(!std::is_lvalue_reference<T>::value,
- "can not forward an rvalue as an lvalue");
- return static_cast<T &&>(t);
- }
-
- template <typename T>
- inline constexpr remove_reference_t<T> &&move(T &&t) noexcept {
- return static_cast<remove_reference_t<T> &&>(t);
- }
-
-#ifdef MPARK_INTEGER_SEQUENCE
- template <typename T, T... Is>
- using integer_sequence = std::integer_sequence<T, Is...>;
-
- template <std::size_t... Is>
- using index_sequence = std::index_sequence<Is...>;
-
- template <std::size_t N>
- using make_index_sequence = std::make_index_sequence<N>;
-
- template <typename... Ts>
- using index_sequence_for = std::index_sequence_for<Ts...>;
-#else
- template <typename T, T... Is>
- struct integer_sequence {
- using value_type = T;
- static constexpr std::size_t size() noexcept { return sizeof...(Is); }
- };
-
- template <std::size_t... Is>
- using index_sequence = integer_sequence<std::size_t, Is...>;
-
- template <typename Lhs, typename Rhs>
- struct make_index_sequence_concat;
-
- template <std::size_t... Lhs, std::size_t... Rhs>
- struct make_index_sequence_concat<index_sequence<Lhs...>,
- index_sequence<Rhs...>>
- : identity<index_sequence<Lhs..., (sizeof...(Lhs) + Rhs)...>> {};
-
- template <std::size_t N>
- struct make_index_sequence_impl;
-
- template <std::size_t N>
- using make_index_sequence = typename make_index_sequence_impl<N>::type;
-
- template <std::size_t N>
- struct make_index_sequence_impl
- : make_index_sequence_concat<make_index_sequence<N / 2>,
- make_index_sequence<N - (N / 2)>> {};
-
- template <>
- struct make_index_sequence_impl<0> : identity<index_sequence<>> {};
-
- template <>
- struct make_index_sequence_impl<1> : identity<index_sequence<0>> {};
-
- template <typename... Ts>
- using index_sequence_for = make_index_sequence<sizeof...(Ts)>;
-#endif
-
- // <functional>
-#ifdef MPARK_TRANSPARENT_OPERATORS
- using equal_to = std::equal_to<>;
-#else
- struct equal_to {
- template <typename Lhs, typename Rhs>
- inline constexpr auto operator()(Lhs &&lhs, Rhs &&rhs) const
- RETURN(lib::forward<Lhs>(lhs) == lib::forward<Rhs>(rhs))
- };
-#endif
-
-#ifdef MPARK_TRANSPARENT_OPERATORS
- using not_equal_to = std::not_equal_to<>;
-#else
- struct not_equal_to {
- template <typename Lhs, typename Rhs>
- inline constexpr auto operator()(Lhs &&lhs, Rhs &&rhs) const
- RETURN(lib::forward<Lhs>(lhs) != lib::forward<Rhs>(rhs))
- };
-#endif
-
-#ifdef MPARK_TRANSPARENT_OPERATORS
- using less = std::less<>;
-#else
- struct less {
- template <typename Lhs, typename Rhs>
- inline constexpr auto operator()(Lhs &&lhs, Rhs &&rhs) const
- RETURN(lib::forward<Lhs>(lhs) < lib::forward<Rhs>(rhs))
- };
-#endif
-
-#ifdef MPARK_TRANSPARENT_OPERATORS
- using greater = std::greater<>;
-#else
- struct greater {
- template <typename Lhs, typename Rhs>
- inline constexpr auto operator()(Lhs &&lhs, Rhs &&rhs) const
- RETURN(lib::forward<Lhs>(lhs) > lib::forward<Rhs>(rhs))
- };
-#endif
-
-#ifdef MPARK_TRANSPARENT_OPERATORS
- using less_equal = std::less_equal<>;
-#else
- struct less_equal {
- template <typename Lhs, typename Rhs>
- inline constexpr auto operator()(Lhs &&lhs, Rhs &&rhs) const
- RETURN(lib::forward<Lhs>(lhs) <= lib::forward<Rhs>(rhs))
- };
-#endif
-
-#ifdef MPARK_TRANSPARENT_OPERATORS
- using greater_equal = std::greater_equal<>;
-#else
- struct greater_equal {
- template <typename Lhs, typename Rhs>
- inline constexpr auto operator()(Lhs &&lhs, Rhs &&rhs) const
- RETURN(lib::forward<Lhs>(lhs) >= lib::forward<Rhs>(rhs))
- };
-#endif
- } // namespace cpp14
-
- inline namespace cpp17 {
-
- // <type_traits>
- template <bool B>
- using bool_constant = std::integral_constant<bool, B>;
-
- template <typename...>
- struct voider : identity<void> {};
-
- template <typename... Ts>
- using void_t = typename voider<Ts...>::type;
-
- namespace detail {
- namespace swappable {
-
- using std::swap;
-
- template <typename T>
- struct is_swappable_impl {
- private:
- template <typename U,
- typename = decltype(swap(std::declval<U &>(),
- std::declval<U &>()))>
- inline static std::true_type test(int);
-
- template <typename U>
- inline static std::false_type test(...);
-
- public:
- using type = decltype(test<T>(0));
- };
-
- template <typename T>
- using is_swappable = typename is_swappable_impl<T>::type;
-
- template <typename T, bool = is_swappable<T>::value>
- struct is_nothrow_swappable {
- static constexpr bool value =
- noexcept(swap(std::declval<T &>(), std::declval<T &>()));
- };
-
- template <typename T>
- struct is_nothrow_swappable<T, false> : std::false_type {};
-
- } // namespace swappable
- } // namespace detail
-
- template <typename T>
- using is_swappable = detail::swappable::is_swappable<T>;
-
- template <typename T>
- using is_nothrow_swappable = detail::swappable::is_nothrow_swappable<T>;
-
- // <functional>
-#ifdef _MSC_VER
-#pragma warning(push)
-#pragma warning(disable : 4100)
-#endif
- template <typename F, typename... As>
- inline constexpr auto invoke(F &&f, As &&... as)
- RETURN(lib::forward<F>(f)(lib::forward<As>(as)...))
-#ifdef _MSC_VER
-#pragma warning(pop)
-#endif
-
- template <typename B, typename T, typename D>
- inline constexpr auto invoke(T B::*pmv, D &&d)
- RETURN(lib::forward<D>(d).*pmv)
-
- template <typename Pmv, typename Ptr>
- inline constexpr auto invoke(Pmv pmv, Ptr &&ptr)
- RETURN((*lib::forward<Ptr>(ptr)).*pmv)
-
- template <typename B, typename T, typename D, typename... As>
- inline constexpr auto invoke(T B::*pmf, D &&d, As &&... as)
- RETURN((lib::forward<D>(d).*pmf)(lib::forward<As>(as)...))
-
- template <typename Pmf, typename Ptr, typename... As>
- inline constexpr auto invoke(Pmf pmf, Ptr &&ptr, As &&... as)
- RETURN(((*lib::forward<Ptr>(ptr)).*pmf)(lib::forward<As>(as)...))
-
- namespace detail {
-
- template <typename Void, typename, typename...>
- struct invoke_result {};
-
- template <typename F, typename... Args>
- struct invoke_result<void_t<decltype(lib::invoke(
- std::declval<F>(), std::declval<Args>()...))>,
- F,
- Args...>
- : identity<decltype(
- lib::invoke(std::declval<F>(), std::declval<Args>()...))> {};
-
- } // namespace detail
-
- template <typename F, typename... Args>
- using invoke_result = detail::invoke_result<void, F, Args...>;
-
- template <typename F, typename... Args>
- using invoke_result_t = typename invoke_result<F, Args...>::type;
-
- namespace detail {
-
- template <typename Void, typename, typename...>
- struct is_invocable : std::false_type {};
-
- template <typename F, typename... Args>
- struct is_invocable<void_t<invoke_result_t<F, Args...>>, F, Args...>
- : std::true_type {};
-
- template <typename Void, typename, typename, typename...>
- struct is_invocable_r : std::false_type {};
-
- template <typename R, typename F, typename... Args>
- struct is_invocable_r<void_t<invoke_result_t<F, Args...>>,
- R,
- F,
- Args...>
- : std::is_convertible<invoke_result_t<F, Args...>, R> {};
-
- } // namespace detail
-
- template <typename F, typename... Args>
- using is_invocable = detail::is_invocable<void, F, Args...>;
-
- template <typename R, typename F, typename... Args>
- using is_invocable_r = detail::is_invocable_r<void, R, F, Args...>;
-
- // <memory>
-#ifdef MPARK_BUILTIN_ADDRESSOF
- template <typename T>
- inline constexpr T *addressof(T &arg) {
- return __builtin_addressof(arg);
- }
-#else
- namespace detail {
-
- namespace has_addressof_impl {
-
- struct fail;
-
- template <typename T>
- inline fail operator&(T &&);
-
- template <typename T>
- inline static constexpr bool impl() {
- return (std::is_class<T>::value || std::is_union<T>::value) &&
- !std::is_same<decltype(&std::declval<T &>()), fail>::value;
- }
-
- } // namespace has_addressof_impl
-
- template <typename T>
- using has_addressof = bool_constant<has_addressof_impl::impl<T>()>;
-
- template <typename T>
- inline constexpr T *addressof(T &arg, std::true_type) {
- return std::addressof(arg);
- }
-
- template <typename T>
- inline constexpr T *addressof(T &arg, std::false_type) {
- return &arg;
- }
-
- } // namespace detail
-
- template <typename T>
- inline constexpr T *addressof(T &arg) {
- return detail::addressof(arg, detail::has_addressof<T>{});
- }
-#endif
-
- template <typename T>
- inline constexpr T *addressof(const T &&) = delete;
-
- } // namespace cpp17
-
- template <typename T>
- struct remove_all_extents : identity<T> {};
-
- template <typename T, std::size_t N>
- struct remove_all_extents<array<T, N>> : remove_all_extents<T> {};
-
- template <typename T>
- using remove_all_extents_t = typename remove_all_extents<T>::type;
-
- template <std::size_t N>
- using size_constant = std::integral_constant<std::size_t, N>;
-
- template <bool... Bs>
- using bool_sequence = integer_sequence<bool, Bs...>;
-
- template <std::size_t I, typename T>
- struct indexed_type : size_constant<I>, identity<T> {};
-
- template <bool... Bs>
- using all =
- std::is_same<bool_sequence<true, Bs...>, bool_sequence<Bs..., true>>;
-
-#ifdef MPARK_TYPE_PACK_ELEMENT
- template <std::size_t I, typename... Ts>
- using type_pack_element_t = __type_pack_element<I, Ts...>;
-#else
- template <std::size_t I, typename... Ts>
- struct type_pack_element_impl {
- private:
- template <typename>
- struct set;
-
- template <std::size_t... Is>
- struct set<index_sequence<Is...>> : indexed_type<Is, Ts>... {};
-
- template <typename T>
- inline static std::enable_if<true, T> impl(indexed_type<I, T>);
-
- inline static std::enable_if<false> impl(...);
-
- public:
- using type = decltype(impl(set<index_sequence_for<Ts...>>{}));
- };
-
- template <std::size_t I, typename... Ts>
- using type_pack_element = typename type_pack_element_impl<I, Ts...>::type;
-
- template <std::size_t I, typename... Ts>
- using type_pack_element_t = typename type_pack_element<I, Ts...>::type;
-#endif
-
-#ifdef MPARK_TRIVIALITY_TYPE_TRAITS
- template <typename T>
- using is_trivially_copy_constructible =
- std::is_trivially_copy_constructible<T>;
-
- template <typename T>
- using is_trivially_move_constructible =
- std::is_trivially_move_constructible<T>;
-
- template <typename T>
- using is_trivially_copy_assignable = std::is_trivially_copy_assignable<T>;
-
- template <typename T>
- using is_trivially_move_assignable = std::is_trivially_move_assignable<T>;
-#else
- template <typename T>
- struct is_trivially_copy_constructible
- : bool_constant<
- std::is_copy_constructible<T>::value && __has_trivial_copy(T)> {};
-
- template <typename T>
- struct is_trivially_move_constructible : bool_constant<__is_trivial(T)> {};
-
- template <typename T>
- struct is_trivially_copy_assignable
- : bool_constant<
- std::is_copy_assignable<T>::value && __has_trivial_assign(T)> {};
-
- template <typename T>
- struct is_trivially_move_assignable : bool_constant<__is_trivial(T)> {};
-#endif
-
- } // namespace lib
-} // namespace mpark
-
-#undef RETURN
-
-#endif // MPARK_LIB_HPP
diff --git a/depedencies/include/mpark/variant.hpp b/depedencies/include/mpark/variant.hpp
deleted file mode 100644
index 3faecba..0000000
--- a/depedencies/include/mpark/variant.hpp
+++ /dev/null
@@ -1,1827 +0,0 @@
-// MPark.Variant
-//
-// Copyright Michael Park, 2015-2017
-//
-// Distributed under the Boost Software License, Version 1.0.
-// (See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt)
-
-#ifndef MPARK_VARIANT_HPP
-#define MPARK_VARIANT_HPP
-
-/*
- variant synopsis
-
-namespace std {
-
- // 20.7.2, class template variant
- template <class... Types>
- class variant {
- public:
-
- // 20.7.2.1, constructors
- constexpr variant() noexcept(see below);
- variant(const variant&);
- variant(variant&&) noexcept(see below);
-
- template <class T> constexpr variant(T&&) noexcept(see below);
-
- template <class T, class... Args>
- constexpr explicit variant(in_place_type_t<T>, Args&&...);
-
- template <class T, class U, class... Args>
- constexpr explicit variant(
- in_place_type_t<T>, initializer_list<U>, Args&&...);
-
- template <size_t I, class... Args>
- constexpr explicit variant(in_place_index_t<I>, Args&&...);
-
- template <size_t I, class U, class... Args>
- constexpr explicit variant(
- in_place_index_t<I>, initializer_list<U>, Args&&...);
-
- // 20.7.2.2, destructor
- ~variant();
-
- // 20.7.2.3, assignment
- variant& operator=(const variant&);
- variant& operator=(variant&&) noexcept(see below);
-
- template <class T> variant& operator=(T&&) noexcept(see below);
-
- // 20.7.2.4, modifiers
- template <class T, class... Args>
- T& emplace(Args&&...);
-
- template <class T, class U, class... Args>
- T& emplace(initializer_list<U>, Args&&...);
-
- template <size_t I, class... Args>
- variant_alternative<I, variant>& emplace(Args&&...);
-
- template <size_t I, class U, class... Args>
- variant_alternative<I, variant>& emplace(initializer_list<U>, Args&&...);
-
- // 20.7.2.5, value status
- constexpr bool valueless_by_exception() const noexcept;
- constexpr size_t index() const noexcept;
-
- // 20.7.2.6, swap
- void swap(variant&) noexcept(see below);
- };
-
- // 20.7.3, variant helper classes
- template <class T> struct variant_size; // undefined
-
- template <class T>
- constexpr size_t variant_size_v = variant_size<T>::value;
-
- template <class T> struct variant_size<const T>;
- template <class T> struct variant_size<volatile T>;
- template <class T> struct variant_size<const volatile T>;
-
- template <class... Types>
- struct variant_size<variant<Types...>>;
-
- template <size_t I, class T> struct variant_alternative; // undefined
-
- template <size_t I, class T>
- using variant_alternative_t = typename variant_alternative<I, T>::type;
-
- template <size_t I, class T> struct variant_alternative<I, const T>;
- template <size_t I, class T> struct variant_alternative<I, volatile T>;
- template <size_t I, class T> struct variant_alternative<I, const volatile T>;
-
- template <size_t I, class... Types>
- struct variant_alternative<I, variant<Types...>>;
-
- constexpr size_t variant_npos = -1;
-
- // 20.7.4, value access
- template <class T, class... Types>
- constexpr bool holds_alternative(const variant<Types...>&) noexcept;
-
- template <size_t I, class... Types>
- constexpr variant_alternative_t<I, variant<Types...>>&
- get(variant<Types...>&);
-
- template <size_t I, class... Types>
- constexpr variant_alternative_t<I, variant<Types...>>&&
- get(variant<Types...>&&);
-
- template <size_t I, class... Types>
- constexpr variant_alternative_t<I, variant<Types...>> const&
- get(const variant<Types...>&);
-
- template <size_t I, class... Types>
- constexpr variant_alternative_t<I, variant<Types...>> const&&
- get(const variant<Types...>&&);
-
- template <class T, class... Types>
- constexpr T& get(variant<Types...>&);
-
- template <class T, class... Types>
- constexpr T&& get(variant<Types...>&&);
-
- template <class T, class... Types>
- constexpr const T& get(const variant<Types...>&);
-
- template <class T, class... Types>
- constexpr const T&& get(const variant<Types...>&&);
-
- template <size_t I, class... Types>
- constexpr add_pointer_t<variant_alternative_t<I, variant<Types...>>>
- get_if(variant<Types...>*) noexcept;
-
- template <size_t I, class... Types>
- constexpr add_pointer_t<const variant_alternative_t<I, variant<Types...>>>
- get_if(const variant<Types...>*) noexcept;
-
- template <class T, class... Types>
- constexpr add_pointer_t<T>
- get_if(variant<Types...>*) noexcept;
-
- template <class T, class... Types>
- constexpr add_pointer_t<const T>
- get_if(const variant<Types...>*) noexcept;
-
- // 20.7.5, relational operators
- template <class... Types>
- constexpr bool operator==(const variant<Types...>&, const variant<Types...>&);
-
- template <class... Types>
- constexpr bool operator!=(const variant<Types...>&, const variant<Types...>&);
-
- template <class... Types>
- constexpr bool operator<(const variant<Types...>&, const variant<Types...>&);
-
- template <class... Types>
- constexpr bool operator>(const variant<Types...>&, const variant<Types...>&);
-
- template <class... Types>
- constexpr bool operator<=(const variant<Types...>&, const variant<Types...>&);
-
- template <class... Types>
- constexpr bool operator>=(const variant<Types...>&, const variant<Types...>&);
-
- // 20.7.6, visitation
- template <class Visitor, class... Variants>
- constexpr see below visit(Visitor&&, Variants&&...);
-
- // 20.7.7, class monostate
- struct monostate;
-
- // 20.7.8, monostate relational operators
- constexpr bool operator<(monostate, monostate) noexcept;
- constexpr bool operator>(monostate, monostate) noexcept;
- constexpr bool operator<=(monostate, monostate) noexcept;
- constexpr bool operator>=(monostate, monostate) noexcept;
- constexpr bool operator==(monostate, monostate) noexcept;
- constexpr bool operator!=(monostate, monostate) noexcept;
-
- // 20.7.9, specialized algorithms
- template <class... Types>
- void swap(variant<Types...>&, variant<Types...>&) noexcept(see below);
-
- // 20.7.10, class bad_variant_access
- class bad_variant_access;
-
- // 20.7.11, hash support
- template <class T> struct hash;
- template <class... Types> struct hash<variant<Types...>>;
- template <> struct hash<monostate>;
-
-} // namespace std
-
-*/
-
-#include <cstddef>
-#include <exception>
-#include <functional>
-#include <initializer_list>
-#include <new>
-#include <type_traits>
-#include <utility>
-
-#include "config.hpp"
-#include "in_place.hpp"
-#include "lib.hpp"
-
-namespace mpark {
-
-#ifdef MPARK_RETURN_TYPE_DEDUCTION
-
-#define AUTO auto
-#define AUTO_RETURN(...) { return __VA_ARGS__; }
-
-#define AUTO_REFREF auto &&
-#define AUTO_REFREF_RETURN(...) { return __VA_ARGS__; }
-
-#define DECLTYPE_AUTO decltype(auto)
-#define DECLTYPE_AUTO_RETURN(...) { return __VA_ARGS__; }
-
-#else
-
-#define AUTO auto
-#define AUTO_RETURN(...) \
- -> lib::decay_t<decltype(__VA_ARGS__)> { return __VA_ARGS__; }
-
-#define AUTO_REFREF auto
-#define AUTO_REFREF_RETURN(...) \
- -> decltype((__VA_ARGS__)) { \
- static_assert(std::is_reference<decltype((__VA_ARGS__))>::value, ""); \
- return __VA_ARGS__; \
- }
-
-#define DECLTYPE_AUTO auto
-#define DECLTYPE_AUTO_RETURN(...) \
- -> decltype(__VA_ARGS__) { return __VA_ARGS__; }
-
-#endif
-
- class bad_variant_access : public std::exception {
- public:
- virtual const char *what() const noexcept { return "bad_variant_access"; }
- };
-
- [[noreturn]] inline void throw_bad_variant_access() {
-#ifdef MPARK_EXCEPTIONS
- throw bad_variant_access{};
-#else
- std::terminate();
-#endif
- }
-
- template <typename... Ts>
- class variant;
-
- template <typename T>
- struct variant_size;
-
-#ifdef MPARK_VARIABLE_TEMPLATES
- template <typename T>
- constexpr std::size_t variant_size_v = variant_size<T>::value;
-#endif
-
- template <typename T>
- struct variant_size<const T> : variant_size<T> {};
-
- template <typename T>
- struct variant_size<volatile T> : variant_size<T> {};
-
- template <typename T>
- struct variant_size<const volatile T> : variant_size<T> {};
-
- template <typename... Ts>
- struct variant_size<variant<Ts...>> : lib::size_constant<sizeof...(Ts)> {};
-
- template <std::size_t I, typename T>
- struct variant_alternative;
-
- template <std::size_t I, typename T>
- using variant_alternative_t = typename variant_alternative<I, T>::type;
-
- template <std::size_t I, typename T>
- struct variant_alternative<I, const T>
- : std::add_const<variant_alternative_t<I, T>> {};
-
- template <std::size_t I, typename T>
- struct variant_alternative<I, volatile T>
- : std::add_volatile<variant_alternative_t<I, T>> {};
-
- template <std::size_t I, typename T>
- struct variant_alternative<I, const volatile T>
- : std::add_cv<variant_alternative_t<I, T>> {};
-
- template <std::size_t I, typename... Ts>
- struct variant_alternative<I, variant<Ts...>> {
- static_assert(I < sizeof...(Ts),
- "Index out of bounds in std::variant_alternative<>");
- using type = lib::type_pack_element_t<I, Ts...>;
- };
-
- constexpr std::size_t variant_npos = static_cast<std::size_t>(-1);
-
- namespace detail {
-
- inline constexpr bool all() { return true; }
-
- template <typename... Bs>
- inline constexpr bool all(bool b, Bs... bs) {
- return b && all(bs...);
- }
-
- constexpr std::size_t not_found = static_cast<std::size_t>(-1);
- constexpr std::size_t ambiguous = static_cast<std::size_t>(-2);
-
-#ifdef MPARK_CPP14_CONSTEXPR
- template <typename T, typename... Ts>
- inline constexpr std::size_t find_index() {
- constexpr lib::array<bool, sizeof...(Ts)> matches = {
- {std::is_same<T, Ts>::value...}
- };
- std::size_t result = not_found;
- for (std::size_t i = 0; i < sizeof...(Ts); ++i) {
- if (matches[i]) {
- if (result != not_found) {
- return ambiguous;
- }
- result = i;
- }
- }
- return result;
- }
-#else
- inline constexpr std::size_t find_index_impl(std::size_t result,
- std::size_t) {
- return result;
- }
-
- template <typename... Bs>
- inline constexpr std::size_t find_index_impl(std::size_t result,
- std::size_t idx,
- bool b,
- Bs... bs) {
- return b ? (result != not_found ? ambiguous
- : find_index_impl(idx, idx + 1, bs...))
- : find_index_impl(result, idx + 1, bs...);
- }
-
- template <typename T, typename... Ts>
- inline constexpr std::size_t find_index() {
- return find_index_impl(not_found, 0, std::is_same<T, Ts>::value...);
- }
-#endif
-
- template <std::size_t I>
- using find_index_sfinae_impl =
- lib::enable_if_t<I != not_found && I != ambiguous,
- lib::size_constant<I>>;
-
- template <typename T, typename... Ts>
- using find_index_sfinae = find_index_sfinae_impl<find_index<T, Ts...>()>;
-
- template <std::size_t I>
- struct find_index_checked_impl : lib::size_constant<I> {
- static_assert(I != not_found, "the specified type is not found.");
- static_assert(I != ambiguous, "the specified type is ambiguous.");
- };
-
- template <typename T, typename... Ts>
- using find_index_checked = find_index_checked_impl<find_index<T, Ts...>()>;
-
- struct valueless_t {};
-
- enum class Trait { TriviallyAvailable, Available, Unavailable };
-
- template <typename T,
- template <typename> class IsTriviallyAvailable,
- template <typename> class IsAvailable>
- inline constexpr Trait trait() {
- return IsTriviallyAvailable<T>::value
- ? Trait::TriviallyAvailable
- : IsAvailable<T>::value ? Trait::Available
- : Trait::Unavailable;
- }
-
-#ifdef MPARK_CPP14_CONSTEXPR
- template <typename... Traits>
- inline constexpr Trait common_trait(Traits... traits) {
- Trait result = Trait::TriviallyAvailable;
- for (Trait t : {traits...}) {
- if (static_cast<int>(t) > static_cast<int>(result)) {
- result = t;
- }
- }
- return result;
- }
-#else
- inline constexpr Trait common_trait_impl(Trait result) { return result; }
-
- template <typename... Traits>
- inline constexpr Trait common_trait_impl(Trait result,
- Trait t,
- Traits... ts) {
- return static_cast<int>(t) > static_cast<int>(result)
- ? common_trait_impl(t, ts...)
- : common_trait_impl(result, ts...);
- }
-
- template <typename... Traits>
- inline constexpr Trait common_trait(Traits... ts) {
- return common_trait_impl(Trait::TriviallyAvailable, ts...);
- }
-#endif
-
- template <typename... Ts>
- struct traits {
- static constexpr Trait copy_constructible_trait =
- common_trait(trait<Ts,
- lib::is_trivially_copy_constructible,
- std::is_copy_constructible>()...);
-
- static constexpr Trait move_constructible_trait =
- common_trait(trait<Ts,
- lib::is_trivially_move_constructible,
- std::is_move_constructible>()...);
-
- static constexpr Trait copy_assignable_trait =
- common_trait(copy_constructible_trait,
- trait<Ts,
- lib::is_trivially_copy_assignable,
- std::is_copy_assignable>()...);
-
- static constexpr Trait move_assignable_trait =
- common_trait(move_constructible_trait,
- trait<Ts,
- lib::is_trivially_move_assignable,
- std::is_move_assignable>()...);
-
- static constexpr Trait destructible_trait =
- common_trait(trait<Ts,
- std::is_trivially_destructible,
- std::is_destructible>()...);
- };
-
- namespace access {
-
- struct recursive_union {
-#ifdef MPARK_RETURN_TYPE_DEDUCTION
- template <typename V>
- inline static constexpr auto &&get_alt(V &&v, in_place_index_t<0>) {
- return lib::forward<V>(v).head_;
- }
-
- template <typename V, std::size_t I>
- inline static constexpr auto &&get_alt(V &&v, in_place_index_t<I>) {
- return get_alt(lib::forward<V>(v).tail_, in_place_index_t<I - 1>{});
- }
-#else
- template <std::size_t I, bool Dummy = true>
- struct get_alt_impl {
- template <typename V>
- inline constexpr AUTO_REFREF operator()(V &&v) const
- AUTO_REFREF_RETURN(get_alt_impl<I - 1>{}(lib::forward<V>(v).tail_))
- };
-
- template <bool Dummy>
- struct get_alt_impl<0, Dummy> {
- template <typename V>
- inline constexpr AUTO_REFREF operator()(V &&v) const
- AUTO_REFREF_RETURN(lib::forward<V>(v).head_)
- };
-
- template <typename V, std::size_t I>
- inline static constexpr AUTO_REFREF get_alt(V &&v, in_place_index_t<I>)
- AUTO_REFREF_RETURN(get_alt_impl<I>{}(lib::forward<V>(v)))
-#endif
- };
-
- struct base {
- template <std::size_t I, typename V>
- inline static constexpr AUTO_REFREF get_alt(V &&v)
- AUTO_REFREF_RETURN(recursive_union::get_alt(
- data(lib::forward<V>(v)), in_place_index_t<I>{}))
- };
-
- struct variant {
- template <std::size_t I, typename V>
- inline static constexpr AUTO_REFREF get_alt(V &&v)
- AUTO_REFREF_RETURN(base::get_alt<I>(lib::forward<V>(v).impl_))
- };
-
- } // namespace access
-
- namespace visitation {
-
- struct base {
- private:
- template <typename T>
- inline static constexpr const T &at(const T &elem) {
- return elem;
- }
-
- template <typename T, std::size_t N, typename... Is>
- inline static constexpr const lib::remove_all_extents_t<T> &at(
- const lib::array<T, N> &elems, std::size_t i, Is... is) {
- return at(elems[i], is...);
- }
-
- template <typename F, typename... Fs>
- inline static constexpr int visit_visitor_return_type_check() {
- static_assert(all(std::is_same<F, Fs>::value...),
- "`mpark::visit` requires the visitor to have a single "
- "return type.");
- return 0;
- }
-
- template <typename... Fs>
- inline static constexpr lib::array<
- lib::common_type_t<lib::decay_t<Fs>...>,
- sizeof...(Fs)>
- make_farray(Fs &&... fs) {
- using result = lib::array<lib::common_type_t<lib::decay_t<Fs>...>,
- sizeof...(Fs)>;
- return visit_visitor_return_type_check<lib::decay_t<Fs>...>(),
- result{{lib::forward<Fs>(fs)...}};
- }
-
- template <std::size_t... Is>
- struct dispatcher {
- template <typename F, typename... Vs>
- struct impl {
- inline static constexpr DECLTYPE_AUTO dispatch(F f, Vs... vs)
- DECLTYPE_AUTO_RETURN(lib::invoke(
- static_cast<F>(f),
- access::base::get_alt<Is>(static_cast<Vs>(vs))...))
- };
- };
-
- template <typename F, typename... Vs, std::size_t... Is>
- inline static constexpr AUTO make_dispatch(lib::index_sequence<Is...>)
- AUTO_RETURN(&dispatcher<Is...>::template impl<F, Vs...>::dispatch)
-
- template <std::size_t I, typename F, typename... Vs>
- inline static constexpr AUTO make_fdiagonal_impl()
- AUTO_RETURN(make_dispatch<F, Vs...>(
- lib::index_sequence<lib::indexed_type<I, Vs>::value...>{}))
-
- template <typename F, typename... Vs, std::size_t... Is>
- inline static constexpr AUTO make_fdiagonal_impl(
- lib::index_sequence<Is...>)
- AUTO_RETURN(make_farray(make_fdiagonal_impl<Is, F, Vs...>()...))
-
- template <typename F, typename V, typename... Vs>
- inline static constexpr /* auto * */ auto make_fdiagonal()
- -> decltype(make_fdiagonal_impl<F, V, Vs...>(
- lib::make_index_sequence<lib::decay_t<V>::size()>{})) {
- static_assert(
- all((lib::decay_t<V>::size() == lib::decay_t<Vs>::size())...),
- "all of the variants must be the same size.");
- return make_fdiagonal_impl<F, V, Vs...>(
- lib::make_index_sequence<lib::decay_t<V>::size()>{});
- }
-
-#ifdef MPARK_RETURN_TYPE_DEDUCTION
- template <typename F, typename... Vs, std::size_t... Is>
- inline static constexpr auto make_fmatrix_impl(
- lib::index_sequence<Is...> is) {
- return make_dispatch<F, Vs...>(is);
- }
-
- template <typename F,
- typename... Vs,
- std::size_t... Is,
- std::size_t... Js,
- typename... Ls>
- inline static constexpr auto make_fmatrix_impl(
- lib::index_sequence<Is...>, lib::index_sequence<Js...>, Ls... ls) {
- return make_farray(make_fmatrix_impl<F, Vs...>(
- lib::index_sequence<Is..., Js>{}, ls...)...);
- }
-
- template <typename F, typename... Vs>
- inline static constexpr auto make_fmatrix() {
- return make_fmatrix_impl<F, Vs...>(
- lib::index_sequence<>{},
- lib::make_index_sequence<lib::decay_t<Vs>::size()>{}...);
- }
-#else
- template <typename F, typename... Vs>
- struct make_fmatrix_impl {
- template <typename...>
- struct impl;
-
- template <std::size_t... Is>
- struct impl<lib::index_sequence<Is...>> {
- inline constexpr AUTO operator()() const
- AUTO_RETURN(
- make_dispatch<F, Vs...>(lib::index_sequence<Is...>{}))
- };
-
- template <std::size_t... Is, std::size_t... Js, typename... Ls>
- struct impl<lib::index_sequence<Is...>,
- lib::index_sequence<Js...>,
- Ls...> {
- inline constexpr AUTO operator()() const
- AUTO_RETURN(make_farray(
- impl<lib::index_sequence<Is..., Js>, Ls...>{}()...))
- };
- };
-
- template <typename F, typename... Vs>
- inline static constexpr AUTO make_fmatrix()
- AUTO_RETURN(
- typename make_fmatrix_impl<F, Vs...>::template impl<
- lib::index_sequence<>,
- lib::make_index_sequence<lib::decay_t<Vs>::size()>...>{}())
-#endif
-
- public:
- template <typename Visitor, typename... Vs>
- inline static constexpr DECLTYPE_AUTO visit_alt_at(std::size_t index,
- Visitor &&visitor,
- Vs &&... vs)
- DECLTYPE_AUTO_RETURN(
- at(make_fdiagonal<Visitor &&,
- decltype(as_base(lib::forward<Vs>(vs)))...>(),
- index)(lib::forward<Visitor>(visitor),
- as_base(lib::forward<Vs>(vs))...))
-
- template <typename Visitor, typename... Vs>
- inline static constexpr DECLTYPE_AUTO visit_alt(Visitor &&visitor,
- Vs &&... vs)
- DECLTYPE_AUTO_RETURN(
- at(make_fmatrix<Visitor &&,
- decltype(as_base(lib::forward<Vs>(vs)))...>(),
- vs.index()...)(lib::forward<Visitor>(visitor),
- as_base(lib::forward<Vs>(vs))...))
- };
-
- struct variant {
- private:
- template <typename Visitor, typename... Values>
- struct visit_exhaustive_visitor_check {
- static_assert(
- lib::is_invocable<Visitor, Values...>::value,
- "`mpark::visit` requires the visitor to be exhaustive.");
-
-#ifdef _MSC_VER
-#pragma warning(push)
-#pragma warning(disable : 4100)
-#endif
- inline constexpr DECLTYPE_AUTO operator()(Visitor &&visitor,
- Values &&... values) const
- DECLTYPE_AUTO_RETURN(lib::invoke(lib::forward<Visitor>(visitor),
- lib::forward<Values>(values)...))
-#ifdef _MSC_VER
-#pragma warning(pop)
-#endif
- };
-
- template <typename Visitor>
- struct value_visitor {
- Visitor &&visitor_;
-
- template <typename... Alts>
- inline constexpr DECLTYPE_AUTO operator()(Alts &&... alts) const
- DECLTYPE_AUTO_RETURN(
- visit_exhaustive_visitor_check<
- Visitor,
- decltype((lib::forward<Alts>(alts).value))...>{}(
- lib::forward<Visitor>(visitor_),
- lib::forward<Alts>(alts).value...))
- };
-
- template <typename Visitor>
- inline static constexpr AUTO make_value_visitor(Visitor &&visitor)
- AUTO_RETURN(value_visitor<Visitor>{lib::forward<Visitor>(visitor)})
-
- public:
- template <typename Visitor, typename... Vs>
- inline static constexpr DECLTYPE_AUTO visit_alt_at(std::size_t index,
- Visitor &&visitor,
- Vs &&... vs)
- DECLTYPE_AUTO_RETURN(
- base::visit_alt_at(index,
- lib::forward<Visitor>(visitor),
- lib::forward<Vs>(vs).impl_...))
-
- template <typename Visitor, typename... Vs>
- inline static constexpr DECLTYPE_AUTO visit_alt(Visitor &&visitor,
- Vs &&... vs)
- DECLTYPE_AUTO_RETURN(base::visit_alt(lib::forward<Visitor>(visitor),
- lib::forward<Vs>(vs).impl_...))
-
- template <typename Visitor, typename... Vs>
- inline static constexpr DECLTYPE_AUTO visit_value_at(std::size_t index,
- Visitor &&visitor,
- Vs &&... vs)
- DECLTYPE_AUTO_RETURN(
- visit_alt_at(index,
- make_value_visitor(lib::forward<Visitor>(visitor)),
- lib::forward<Vs>(vs)...))
-
- template <typename Visitor, typename... Vs>
- inline static constexpr DECLTYPE_AUTO visit_value(Visitor &&visitor,
- Vs &&... vs)
- DECLTYPE_AUTO_RETURN(
- visit_alt(make_value_visitor(lib::forward<Visitor>(visitor)),
- lib::forward<Vs>(vs)...))
- };
-
- } // namespace visitation
-
- template <std::size_t Index, typename T>
- struct alt {
- using value_type = T;
-
-#ifdef _MSC_VER
-#pragma warning(push)
-#pragma warning(disable : 4244)
-#endif
- template <typename... Args>
- inline explicit constexpr alt(in_place_t, Args &&... args)
- : value(lib::forward<Args>(args)...) {}
-#ifdef _MSC_VER
-#pragma warning(pop)
-#endif
-
- T value;
- };
-
- template <Trait DestructibleTrait, std::size_t Index, typename... Ts>
- union recursive_union;
-
- template <Trait DestructibleTrait, std::size_t Index>
- union recursive_union<DestructibleTrait, Index> {};
-
-#define MPARK_VARIANT_RECURSIVE_UNION(destructible_trait, destructor) \
- template <std::size_t Index, typename T, typename... Ts> \
- union recursive_union<destructible_trait, Index, T, Ts...> { \
- public: \
- inline explicit constexpr recursive_union(valueless_t) noexcept \
- : dummy_{} {} \
- \
- template <typename... Args> \
- inline explicit constexpr recursive_union(in_place_index_t<0>, \
- Args &&... args) \
- : head_(in_place_t{}, lib::forward<Args>(args)...) {} \
- \
- template <std::size_t I, typename... Args> \
- inline explicit constexpr recursive_union(in_place_index_t<I>, \
- Args &&... args) \
- : tail_(in_place_index_t<I - 1>{}, lib::forward<Args>(args)...) {} \
- \
- recursive_union(const recursive_union &) = default; \
- recursive_union(recursive_union &&) = default; \
- \
- destructor \
- \
- recursive_union &operator=(const recursive_union &) = default; \
- recursive_union &operator=(recursive_union &&) = default; \
- \
- private: \
- char dummy_; \
- alt<Index, T> head_; \
- recursive_union<destructible_trait, Index + 1, Ts...> tail_; \
- \
- friend struct access::recursive_union; \
- }
-
- MPARK_VARIANT_RECURSIVE_UNION(Trait::TriviallyAvailable,
- ~recursive_union() = default;);
- MPARK_VARIANT_RECURSIVE_UNION(Trait::Available,
- ~recursive_union() {});
- MPARK_VARIANT_RECURSIVE_UNION(Trait::Unavailable,
- ~recursive_union() = delete;);
-
-#undef MPARK_VARIANT_RECURSIVE_UNION
-
- using index_t = unsigned int;
-
- template <Trait DestructibleTrait, typename... Ts>
- class base {
- public:
- inline explicit constexpr base(valueless_t tag) noexcept
- : data_(tag), index_(static_cast<index_t>(-1)) {}
-
- template <std::size_t I, typename... Args>
- inline explicit constexpr base(in_place_index_t<I>, Args &&... args)
- : data_(in_place_index_t<I>{}, lib::forward<Args>(args)...),
- index_(I) {}
-
- inline constexpr bool valueless_by_exception() const noexcept {
- return index_ == static_cast<index_t>(-1);
- }
-
- inline constexpr std::size_t index() const noexcept {
- return valueless_by_exception() ? variant_npos : index_;
- }
-
- protected:
- using data_t = recursive_union<DestructibleTrait, 0, Ts...>;
-
- friend inline constexpr base &as_base(base &b) { return b; }
- friend inline constexpr const base &as_base(const base &b) { return b; }
- friend inline constexpr base &&as_base(base &&b) { return lib::move(b); }
- friend inline constexpr const base &&as_base(const base &&b) { return lib::move(b); }
-
- friend inline constexpr data_t &data(base &b) { return b.data_; }
- friend inline constexpr const data_t &data(const base &b) { return b.data_; }
- friend inline constexpr data_t &&data(base &&b) { return lib::move(b).data_; }
- friend inline constexpr const data_t &&data(const base &&b) { return lib::move(b).data_; }
-
- inline static constexpr std::size_t size() { return sizeof...(Ts); }
-
- data_t data_;
- index_t index_;
-
- friend struct access::base;
- friend struct visitation::base;
- };
-
- struct dtor {
-#ifdef _MSC_VER
-#pragma warning(push)
-#pragma warning(disable : 4100)
-#endif
- template <typename Alt>
- inline void operator()(Alt &alt) const noexcept { alt.~Alt(); }
-#ifdef _MSC_VER
-#pragma warning(pop)
-#endif
- };
-
-#if defined(_MSC_VER) && _MSC_VER < 1910
-#define INHERITING_CTOR(type, base) \
- template <typename... Args> \
- inline explicit constexpr type(Args &&... args) \
- : base(lib::forward<Args>(args)...) {}
-#else
-#define INHERITING_CTOR(type, base) using base::base;
-#endif
-
- template <typename Traits, Trait = Traits::destructible_trait>
- class destructor;
-
-#define MPARK_VARIANT_DESTRUCTOR(destructible_trait, definition, destroy) \
- template <typename... Ts> \
- class destructor<traits<Ts...>, destructible_trait> \
- : public base<destructible_trait, Ts...> { \
- using super = base<destructible_trait, Ts...>; \
- \
- public: \
- INHERITING_CTOR(destructor, super) \
- using super::operator=; \
- \
- destructor(const destructor &) = default; \
- destructor(destructor &&) = default; \
- definition \
- destructor &operator=(const destructor &) = default; \
- destructor &operator=(destructor &&) = default; \
- \
- protected: \
- destroy \
- }
-
- MPARK_VARIANT_DESTRUCTOR(
- Trait::TriviallyAvailable,
- ~destructor() = default;,
- inline void destroy() noexcept {
- this->index_ = static_cast<index_t>(-1);
- });
-
- MPARK_VARIANT_DESTRUCTOR(
- Trait::Available,
- ~destructor() { destroy(); },
- inline void destroy() noexcept {
- if (!this->valueless_by_exception()) {
- visitation::base::visit_alt(dtor{}, *this);
- }
- this->index_ = static_cast<index_t>(-1);
- });
-
- MPARK_VARIANT_DESTRUCTOR(
- Trait::Unavailable,
- ~destructor() = delete;,
- inline void destroy() noexcept = delete;);
-
-#undef MPARK_VARIANT_DESTRUCTOR
-
- template <typename Traits>
- class constructor : public destructor<Traits> {
- using super = destructor<Traits>;
-
- public:
- INHERITING_CTOR(constructor, super)
- using super::operator=;
-
- protected:
-#ifndef MPARK_GENERIC_LAMBDAS
- struct ctor {
- template <typename LhsAlt, typename RhsAlt>
- inline void operator()(LhsAlt &lhs_alt, RhsAlt &&rhs_alt) const {
- constructor::construct_alt(lhs_alt,
- lib::forward<RhsAlt>(rhs_alt).value);
- }
- };
-#endif
-
- template <std::size_t I, typename T, typename... Args>
- inline static T &construct_alt(alt<I, T> &a, Args &&... args) {
- ::new (static_cast<void *>(lib::addressof(a)))
- alt<I, T>(in_place_t{}, lib::forward<Args>(args)...);
- return a.value;
- }
-
- template <typename Rhs>
- inline static void generic_construct(constructor &lhs, Rhs &&rhs) {
- lhs.destroy();
- if (!rhs.valueless_by_exception()) {
- visitation::base::visit_alt_at(
- rhs.index(),
-#ifdef MPARK_GENERIC_LAMBDAS
- [](auto &lhs_alt, auto &&rhs_alt) {
- constructor::construct_alt(
- lhs_alt, lib::forward<decltype(rhs_alt)>(rhs_alt).value);
- }
-#else
- ctor{}
-#endif
- ,
- lhs,
- lib::forward<Rhs>(rhs));
- lhs.index_ = rhs.index_;
- }
- }
- };
-
- template <typename Traits, Trait = Traits::move_constructible_trait>
- class move_constructor;
-
-#define MPARK_VARIANT_MOVE_CONSTRUCTOR(move_constructible_trait, definition) \
- template <typename... Ts> \
- class move_constructor<traits<Ts...>, move_constructible_trait> \
- : public constructor<traits<Ts...>> { \
- using super = constructor<traits<Ts...>>; \
- \
- public: \
- INHERITING_CTOR(move_constructor, super) \
- using super::operator=; \
- \
- move_constructor(const move_constructor &) = default; \
- definition \
- ~move_constructor() = default; \
- move_constructor &operator=(const move_constructor &) = default; \
- move_constructor &operator=(move_constructor &&) = default; \
- }
-
- MPARK_VARIANT_MOVE_CONSTRUCTOR(
- Trait::TriviallyAvailable,
- move_constructor(move_constructor &&that) = default;);
-
- MPARK_VARIANT_MOVE_CONSTRUCTOR(
- Trait::Available,
- move_constructor(move_constructor &&that) noexcept(
- all(std::is_nothrow_move_constructible<Ts>::value...))
- : move_constructor(valueless_t{}) {
- this->generic_construct(*this, lib::move(that));
- });
-
- MPARK_VARIANT_MOVE_CONSTRUCTOR(
- Trait::Unavailable,
- move_constructor(move_constructor &&) = delete;);
-
-#undef MPARK_VARIANT_MOVE_CONSTRUCTOR
-
- template <typename Traits, Trait = Traits::copy_constructible_trait>
- class copy_constructor;
-
-#define MPARK_VARIANT_COPY_CONSTRUCTOR(copy_constructible_trait, definition) \
- template <typename... Ts> \
- class copy_constructor<traits<Ts...>, copy_constructible_trait> \
- : public move_constructor<traits<Ts...>> { \
- using super = move_constructor<traits<Ts...>>; \
- \
- public: \
- INHERITING_CTOR(copy_constructor, super) \
- using super::operator=; \
- \
- definition \
- copy_constructor(copy_constructor &&) = default; \
- ~copy_constructor() = default; \
- copy_constructor &operator=(const copy_constructor &) = default; \
- copy_constructor &operator=(copy_constructor &&) = default; \
- }
-
- MPARK_VARIANT_COPY_CONSTRUCTOR(
- Trait::TriviallyAvailable,
- copy_constructor(const copy_constructor &that) = default;);
-
- MPARK_VARIANT_COPY_CONSTRUCTOR(
- Trait::Available,
- copy_constructor(const copy_constructor &that)
- : copy_constructor(valueless_t{}) {
- this->generic_construct(*this, that);
- });
-
- MPARK_VARIANT_COPY_CONSTRUCTOR(
- Trait::Unavailable,
- copy_constructor(const copy_constructor &) = delete;);
-
-#undef MPARK_VARIANT_COPY_CONSTRUCTOR
-
- template <typename Traits>
- class assignment : public copy_constructor<Traits> {
- using super = copy_constructor<Traits>;
-
- public:
- INHERITING_CTOR(assignment, super)
- using super::operator=;
-
- template <std::size_t I, typename... Args>
- inline /* auto & */ auto emplace(Args &&... args)
- -> decltype(this->construct_alt(access::base::get_alt<I>(*this),
- lib::forward<Args>(args)...)) {
- this->destroy();
- auto &result = this->construct_alt(access::base::get_alt<I>(*this),
- lib::forward<Args>(args)...);
- this->index_ = I;
- return result;
- }
-
- protected:
-#ifndef MPARK_GENERIC_LAMBDAS
- template <typename That>
- struct assigner {
- template <typename ThisAlt, typename ThatAlt>
- inline void operator()(ThisAlt &this_alt, ThatAlt &&that_alt) const {
- self->assign_alt(this_alt, lib::forward<ThatAlt>(that_alt).value);
- }
- assignment *self;
- };
-#endif
-
- template <std::size_t I, typename T, typename Arg>
- inline void assign_alt(alt<I, T> &a, Arg &&arg) {
- if (this->index() == I) {
-#ifdef _MSC_VER
-#pragma warning(push)
-#pragma warning(disable : 4244)
-#endif
- a.value = lib::forward<Arg>(arg);
-#ifdef _MSC_VER
-#pragma warning(pop)
-#endif
- } else {
- struct {
- void operator()(std::true_type) const {
- this_->emplace<I>(lib::forward<Arg>(arg_));
- }
- void operator()(std::false_type) const {
- this_->emplace<I>(T(lib::forward<Arg>(arg_)));
- }
- assignment *this_;
- Arg &&arg_;
- } impl{this, lib::forward<Arg>(arg)};
- impl(lib::bool_constant<
- std::is_nothrow_constructible<T, Arg>::value ||
- !std::is_nothrow_move_constructible<T>::value>{});
- }
- }
-
- template <typename That>
- inline void generic_assign(That &&that) {
- if (this->valueless_by_exception() && that.valueless_by_exception()) {
- // do nothing.
- } else if (that.valueless_by_exception()) {
- this->destroy();
- } else {
- visitation::base::visit_alt_at(
- that.index(),
-#ifdef MPARK_GENERIC_LAMBDAS
- [this](auto &this_alt, auto &&that_alt) {
- this->assign_alt(
- this_alt, lib::forward<decltype(that_alt)>(that_alt).value);
- }
-#else
- assigner<That>{this}
-#endif
- ,
- *this,
- lib::forward<That>(that));
- }
- }
- };
-
- template <typename Traits, Trait = Traits::move_assignable_trait>
- class move_assignment;
-
-#define MPARK_VARIANT_MOVE_ASSIGNMENT(move_assignable_trait, definition) \
- template <typename... Ts> \
- class move_assignment<traits<Ts...>, move_assignable_trait> \
- : public assignment<traits<Ts...>> { \
- using super = assignment<traits<Ts...>>; \
- \
- public: \
- INHERITING_CTOR(move_assignment, super) \
- using super::operator=; \
- \
- move_assignment(const move_assignment &) = default; \
- move_assignment(move_assignment &&) = default; \
- ~move_assignment() = default; \
- move_assignment &operator=(const move_assignment &) = default; \
- definition \
- }
-
- MPARK_VARIANT_MOVE_ASSIGNMENT(
- Trait::TriviallyAvailable,
- move_assignment &operator=(move_assignment &&that) = default;);
-
- MPARK_VARIANT_MOVE_ASSIGNMENT(
- Trait::Available,
- move_assignment &
- operator=(move_assignment &&that) noexcept(
- all((std::is_nothrow_move_constructible<Ts>::value &&
- std::is_nothrow_move_assignable<Ts>::value)...)) {
- this->generic_assign(lib::move(that));
- return *this;
- });
-
- MPARK_VARIANT_MOVE_ASSIGNMENT(
- Trait::Unavailable,
- move_assignment &operator=(move_assignment &&) = delete;);
-
-#undef MPARK_VARIANT_MOVE_ASSIGNMENT
-
- template <typename Traits, Trait = Traits::copy_assignable_trait>
- class copy_assignment;
-
-#define MPARK_VARIANT_COPY_ASSIGNMENT(copy_assignable_trait, definition) \
- template <typename... Ts> \
- class copy_assignment<traits<Ts...>, copy_assignable_trait> \
- : public move_assignment<traits<Ts...>> { \
- using super = move_assignment<traits<Ts...>>; \
- \
- public: \
- INHERITING_CTOR(copy_assignment, super) \
- using super::operator=; \
- \
- copy_assignment(const copy_assignment &) = default; \
- copy_assignment(copy_assignment &&) = default; \
- ~copy_assignment() = default; \
- definition \
- copy_assignment &operator=(copy_assignment &&) = default; \
- }
-
- MPARK_VARIANT_COPY_ASSIGNMENT(
- Trait::TriviallyAvailable,
- copy_assignment &operator=(const copy_assignment &that) = default;);
-
- MPARK_VARIANT_COPY_ASSIGNMENT(
- Trait::Available,
- copy_assignment &operator=(const copy_assignment &that) {
- this->generic_assign(that);
- return *this;
- });
-
- MPARK_VARIANT_COPY_ASSIGNMENT(
- Trait::Unavailable,
- copy_assignment &operator=(const copy_assignment &) = delete;);
-
-#undef MPARK_VARIANT_COPY_ASSIGNMENT
-
- template <typename... Ts>
- class impl : public copy_assignment<traits<Ts...>> {
- using super = copy_assignment<traits<Ts...>>;
-
- public:
- INHERITING_CTOR(impl, super)
- using super::operator=;
-
- template <std::size_t I, typename Arg>
- inline void assign(Arg &&arg) {
- this->assign_alt(access::base::get_alt<I>(*this),
- lib::forward<Arg>(arg));
- }
-
- inline void swap(impl &that) {
- if (this->valueless_by_exception() && that.valueless_by_exception()) {
- // do nothing.
- } else if (this->index() == that.index()) {
- visitation::base::visit_alt_at(this->index(),
-#ifdef MPARK_GENERIC_LAMBDAS
- [](auto &this_alt, auto &that_alt) {
- using std::swap;
- swap(this_alt.value,
- that_alt.value);
- }
-#else
- swapper{}
-#endif
- ,
- *this,
- that);
- } else {
- impl *lhs = this;
- impl *rhs = lib::addressof(that);
- if (lhs->move_nothrow() && !rhs->move_nothrow()) {
- std::swap(lhs, rhs);
- }
- impl tmp(lib::move(*rhs));
-#ifdef MPARK_EXCEPTIONS
- // EXTENSION: When the move construction of `lhs` into `rhs` throws
- // and `tmp` is nothrow move constructible then we move `tmp` back
- // into `rhs` and provide the strong exception safety guarantee.
- try {
- this->generic_construct(*rhs, lib::move(*lhs));
- } catch (...) {
- if (tmp.move_nothrow()) {
- this->generic_construct(*rhs, lib::move(tmp));
- }
- throw;
- }
-#else
- this->generic_construct(*rhs, lib::move(*lhs));
-#endif
- this->generic_construct(*lhs, lib::move(tmp));
- }
- }
-
- private:
-#ifndef MPARK_GENERIC_LAMBDAS
- struct swapper {
- template <typename ThisAlt, typename ThatAlt>
- inline void operator()(ThisAlt &this_alt, ThatAlt &that_alt) const {
- using std::swap;
- swap(this_alt.value, that_alt.value);
- }
- };
-#endif
-
- inline constexpr bool move_nothrow() const {
- return this->valueless_by_exception() ||
- lib::array<bool, sizeof...(Ts)>{
- {std::is_nothrow_move_constructible<Ts>::value...}
- }[this->index()];
- }
- };
-
- template <typename... Ts>
- struct overload;
-
- template <>
- struct overload<> { void operator()() const {} };
-
- template <typename T, typename... Ts>
- struct overload<T, Ts...> : overload<Ts...> {
- using overload<Ts...>::operator();
- lib::identity<T> operator()(T) const { return {}; }
- };
-
- template <typename T, typename... Ts>
- using best_match_t =
- typename lib::invoke_result_t<overload<Ts...>, T &&>::type;
-
- template <typename T>
- struct is_in_place_index : std::false_type {};
-
- template <std::size_t I>
- struct is_in_place_index<in_place_index_t<I>> : std::true_type {};
-
- template <typename T>
- struct is_in_place_type : std::false_type {};
-
- template <typename T>
- struct is_in_place_type<in_place_type_t<T>> : std::true_type {};
-
- } // detail
-
- template <typename... Ts>
- class variant {
- static_assert(0 < sizeof...(Ts),
- "variant must consist of at least one alternative.");
-
- static_assert(lib::all<!std::is_array<Ts>::value...>::value,
- "variant can not have an array type as an alternative.");
-
- static_assert(lib::all<!std::is_reference<Ts>::value...>::value,
- "variant can not have a reference type as an alternative.");
-
- static_assert(lib::all<!std::is_void<Ts>::value...>::value,
- "variant can not have a void type as an alternative.");
-
- public:
- template <
- typename Front = lib::type_pack_element_t<0, Ts...>,
- lib::enable_if_t<std::is_default_constructible<Front>::value, int> = 0>
- inline constexpr variant() noexcept(
- std::is_nothrow_default_constructible<Front>::value)
- : impl_(in_place_index_t<0>{}) {}
-
- variant(const variant &) = default;
- variant(variant &&) = default;
-
- template <
- typename Arg,
- typename Decayed = lib::decay_t<Arg>,
- lib::enable_if_t<!std::is_same<Decayed, variant>::value, int> = 0,
- lib::enable_if_t<!detail::is_in_place_index<Decayed>::value, int> = 0,
- lib::enable_if_t<!detail::is_in_place_type<Decayed>::value, int> = 0,
- typename T = detail::best_match_t<Arg, Ts...>,
- std::size_t I = detail::find_index_sfinae<T, Ts...>::value,
- lib::enable_if_t<std::is_constructible<T, Arg>::value, int> = 0>
- inline constexpr variant(Arg &&arg) noexcept(
- std::is_nothrow_constructible<T, Arg>::value)
- : impl_(in_place_index_t<I>{}, lib::forward<Arg>(arg)) {}
-
- template <
- std::size_t I,
- typename... Args,
- typename T = lib::type_pack_element_t<I, Ts...>,
- lib::enable_if_t<std::is_constructible<T, Args...>::value, int> = 0>
- inline explicit constexpr variant(
- in_place_index_t<I>,
- Args &&... args) noexcept(std::is_nothrow_constructible<T,
- Args...>::value)
- : impl_(in_place_index_t<I>{}, lib::forward<Args>(args)...) {}
-
- template <
- std::size_t I,
- typename Up,
- typename... Args,
- typename T = lib::type_pack_element_t<I, Ts...>,
- lib::enable_if_t<std::is_constructible<T,
- std::initializer_list<Up> &,
- Args...>::value,
- int> = 0>
- inline explicit constexpr variant(
- in_place_index_t<I>,
- std::initializer_list<Up> il,
- Args &&... args) noexcept(std::
- is_nothrow_constructible<
- T,
- std::initializer_list<Up> &,
- Args...>::value)
- : impl_(in_place_index_t<I>{}, il, lib::forward<Args>(args)...) {}
-
- template <
- typename T,
- typename... Args,
- std::size_t I = detail::find_index_sfinae<T, Ts...>::value,
- lib::enable_if_t<std::is_constructible<T, Args...>::value, int> = 0>
- inline explicit constexpr variant(
- in_place_type_t<T>,
- Args &&... args) noexcept(std::is_nothrow_constructible<T,
- Args...>::value)
- : impl_(in_place_index_t<I>{}, lib::forward<Args>(args)...) {}
-
- template <
- typename T,
- typename Up,
- typename... Args,
- std::size_t I = detail::find_index_sfinae<T, Ts...>::value,
- lib::enable_if_t<std::is_constructible<T,
- std::initializer_list<Up> &,
- Args...>::value,
- int> = 0>
- inline explicit constexpr variant(
- in_place_type_t<T>,
- std::initializer_list<Up> il,
- Args &&... args) noexcept(std::
- is_nothrow_constructible<
- T,
- std::initializer_list<Up> &,
- Args...>::value)
- : impl_(in_place_index_t<I>{}, il, lib::forward<Args>(args)...) {}
-
- ~variant() = default;
-
- variant &operator=(const variant &) = default;
- variant &operator=(variant &&) = default;
-
- template <typename Arg,
- lib::enable_if_t<!std::is_same<lib::decay_t<Arg>, variant>::value,
- int> = 0,
- typename T = detail::best_match_t<Arg, Ts...>,
- std::size_t I = detail::find_index_sfinae<T, Ts...>::value,
- lib::enable_if_t<(std::is_assignable<T &, Arg>::value &&
- std::is_constructible<T, Arg>::value),
- int> = 0>
- inline variant &operator=(Arg &&arg) noexcept(
- (std::is_nothrow_assignable<T &, Arg>::value &&
- std::is_nothrow_constructible<T, Arg>::value)) {
- impl_.template assign<I>(lib::forward<Arg>(arg));
- return *this;
- }
-
- template <
- std::size_t I,
- typename... Args,
- typename T = lib::type_pack_element_t<I, Ts...>,
- lib::enable_if_t<std::is_constructible<T, Args...>::value, int> = 0>
- inline T &emplace(Args &&... args) {
- return impl_.template emplace<I>(lib::forward<Args>(args)...);
- }
-
- template <
- std::size_t I,
- typename Up,
- typename... Args,
- typename T = lib::type_pack_element_t<I, Ts...>,
- lib::enable_if_t<std::is_constructible<T,
- std::initializer_list<Up> &,
- Args...>::value,
- int> = 0>
- inline T &emplace(std::initializer_list<Up> il, Args &&... args) {
- return impl_.template emplace<I>(il, lib::forward<Args>(args)...);
- }
-
- template <
- typename T,
- typename... Args,
- std::size_t I = detail::find_index_sfinae<T, Ts...>::value,
- lib::enable_if_t<std::is_constructible<T, Args...>::value, int> = 0>
- inline T &emplace(Args &&... args) {
- return impl_.template emplace<I>(lib::forward<Args>(args)...);
- }
-
- template <
- typename T,
- typename Up,
- typename... Args,
- std::size_t I = detail::find_index_sfinae<T, Ts...>::value,
- lib::enable_if_t<std::is_constructible<T,
- std::initializer_list<Up> &,
- Args...>::value,
- int> = 0>
- inline T &emplace(std::initializer_list<Up> il, Args &&... args) {
- return impl_.template emplace<I>(il, lib::forward<Args>(args)...);
- }
-
- inline constexpr bool valueless_by_exception() const noexcept {
- return impl_.valueless_by_exception();
- }
-
- inline constexpr std::size_t index() const noexcept {
- return impl_.index();
- }
-
- template <
- bool Dummy = true,
- lib::enable_if_t<lib::all<Dummy,
- (std::is_move_constructible<Ts>::value &&
- lib::is_swappable<Ts>::value)...>::value,
- int> = 0>
- inline void swap(variant &that) noexcept(
- lib::all<(std::is_nothrow_move_constructible<Ts>::value &&
- lib::is_nothrow_swappable<Ts>::value)...>::value) {
- impl_.swap(that.impl_);
- }
-
- private:
- detail::impl<Ts...> impl_;
-
- friend struct detail::access::variant;
- friend struct detail::visitation::variant;
- };
-
- template <std::size_t I, typename... Ts>
- inline constexpr bool holds_alternative(const variant<Ts...> &v) noexcept {
- return v.index() == I;
- }
-
- template <typename T, typename... Ts>
- inline constexpr bool holds_alternative(const variant<Ts...> &v) noexcept {
- return holds_alternative<detail::find_index_checked<T, Ts...>::value>(v);
- }
-
- namespace detail {
- template <std::size_t I, typename V>
- struct generic_get_impl {
- constexpr generic_get_impl(int) {}
-
- constexpr AUTO_REFREF operator()(V &&v) const
- AUTO_REFREF_RETURN(
- access::variant::get_alt<I>(lib::forward<V>(v)).value)
- };
-
- template <std::size_t I, typename V>
- inline constexpr AUTO_REFREF generic_get(V &&v)
- AUTO_REFREF_RETURN(generic_get_impl<I, V>(
- holds_alternative<I>(v) ? 0 : (throw_bad_variant_access(), 0))(
- lib::forward<V>(v)))
- } // namespace detail
-
- template <std::size_t I, typename... Ts>
- inline constexpr variant_alternative_t<I, variant<Ts...>> &get(
- variant<Ts...> &v) {
- return detail::generic_get<I>(v);
- }
-
- template <std::size_t I, typename... Ts>
- inline constexpr variant_alternative_t<I, variant<Ts...>> &&get(
- variant<Ts...> &&v) {
- return detail::generic_get<I>(lib::move(v));
- }
-
- template <std::size_t I, typename... Ts>
- inline constexpr const variant_alternative_t<I, variant<Ts...>> &get(
- const variant<Ts...> &v) {
- return detail::generic_get<I>(v);
- }
-
- template <std::size_t I, typename... Ts>
- inline constexpr const variant_alternative_t<I, variant<Ts...>> &&get(
- const variant<Ts...> &&v) {
- return detail::generic_get<I>(lib::move(v));
- }
-
- template <typename T, typename... Ts>
- inline constexpr T &get(variant<Ts...> &v) {
- return get<detail::find_index_checked<T, Ts...>::value>(v);
- }
-
- template <typename T, typename... Ts>
- inline constexpr T &&get(variant<Ts...> &&v) {
- return get<detail::find_index_checked<T, Ts...>::value>(lib::move(v));
- }
-
- template <typename T, typename... Ts>
- inline constexpr const T &get(const variant<Ts...> &v) {
- return get<detail::find_index_checked<T, Ts...>::value>(v);
- }
-
- template <typename T, typename... Ts>
- inline constexpr const T &&get(const variant<Ts...> &&v) {
- return get<detail::find_index_checked<T, Ts...>::value>(lib::move(v));
- }
-
- namespace detail {
-
- template <std::size_t I, typename V>
- inline constexpr /* auto * */ AUTO generic_get_if(V *v) noexcept
- AUTO_RETURN(v && holds_alternative<I>(*v)
- ? lib::addressof(access::variant::get_alt<I>(*v).value)
- : nullptr)
-
- } // namespace detail
-
- template <std::size_t I, typename... Ts>
- inline constexpr lib::add_pointer_t<variant_alternative_t<I, variant<Ts...>>>
- get_if(variant<Ts...> *v) noexcept {
- return detail::generic_get_if<I>(v);
- }
-
- template <std::size_t I, typename... Ts>
- inline constexpr lib::add_pointer_t<
- const variant_alternative_t<I, variant<Ts...>>>
- get_if(const variant<Ts...> *v) noexcept {
- return detail::generic_get_if<I>(v);
- }
-
- template <typename T, typename... Ts>
- inline constexpr lib::add_pointer_t<T>
- get_if(variant<Ts...> *v) noexcept {
- return get_if<detail::find_index_checked<T, Ts...>::value>(v);
- }
-
- template <typename T, typename... Ts>
- inline constexpr lib::add_pointer_t<const T>
- get_if(const variant<Ts...> *v) noexcept {
- return get_if<detail::find_index_checked<T, Ts...>::value>(v);
- }
-
- template <typename... Ts>
- inline constexpr bool operator==(const variant<Ts...> &lhs,
- const variant<Ts...> &rhs) {
- using detail::visitation::variant;
- using lib::equal_to;
-#ifdef MPARK_CPP14_CONSTEXPR
- if (lhs.index() != rhs.index()) return false;
- if (lhs.valueless_by_exception()) return true;
- return variant::visit_value_at(lhs.index(), equal_to{}, lhs, rhs);
-#else
- return lhs.index() == rhs.index() &&
- (lhs.valueless_by_exception() ||
- variant::visit_value_at(lhs.index(), equal_to{}, lhs, rhs));
-#endif
- }
-
- template <typename... Ts>
- inline constexpr bool operator!=(const variant<Ts...> &lhs,
- const variant<Ts...> &rhs) {
- using detail::visitation::variant;
- using lib::not_equal_to;
-#ifdef MPARK_CPP14_CONSTEXPR
- if (lhs.index() != rhs.index()) return true;
- if (lhs.valueless_by_exception()) return false;
- return variant::visit_value_at(lhs.index(), not_equal_to{}, lhs, rhs);
-#else
- return lhs.index() != rhs.index() ||
- (!lhs.valueless_by_exception() &&
- variant::visit_value_at(lhs.index(), not_equal_to{}, lhs, rhs));
-#endif
- }
-
- template <typename... Ts>
- inline constexpr bool operator<(const variant<Ts...> &lhs,
- const variant<Ts...> &rhs) {
- using detail::visitation::variant;
- using lib::less;
-#ifdef MPARK_CPP14_CONSTEXPR
- if (rhs.valueless_by_exception()) return false;
- if (lhs.valueless_by_exception()) return true;
- if (lhs.index() < rhs.index()) return true;
- if (lhs.index() > rhs.index()) return false;
- return variant::visit_value_at(lhs.index(), less{}, lhs, rhs);
-#else
- return !rhs.valueless_by_exception() &&
- (lhs.valueless_by_exception() || lhs.index() < rhs.index() ||
- (lhs.index() == rhs.index() &&
- variant::visit_value_at(lhs.index(), less{}, lhs, rhs)));
-#endif
- }
-
- template <typename... Ts>
- inline constexpr bool operator>(const variant<Ts...> &lhs,
- const variant<Ts...> &rhs) {
- using detail::visitation::variant;
- using lib::greater;
-#ifdef MPARK_CPP14_CONSTEXPR
- if (lhs.valueless_by_exception()) return false;
- if (rhs.valueless_by_exception()) return true;
- if (lhs.index() > rhs.index()) return true;
- if (lhs.index() < rhs.index()) return false;
- return variant::visit_value_at(lhs.index(), greater{}, lhs, rhs);
-#else
- return !lhs.valueless_by_exception() &&
- (rhs.valueless_by_exception() || lhs.index() > rhs.index() ||
- (lhs.index() == rhs.index() &&
- variant::visit_value_at(lhs.index(), greater{}, lhs, rhs)));
-#endif
- }
-
- template <typename... Ts>
- inline constexpr bool operator<=(const variant<Ts...> &lhs,
- const variant<Ts...> &rhs) {
- using detail::visitation::variant;
- using lib::less_equal;
-#ifdef MPARK_CPP14_CONSTEXPR
- if (lhs.valueless_by_exception()) return true;
- if (rhs.valueless_by_exception()) return false;
- if (lhs.index() < rhs.index()) return true;
- if (lhs.index() > rhs.index()) return false;
- return variant::visit_value_at(lhs.index(), less_equal{}, lhs, rhs);
-#else
- return lhs.valueless_by_exception() ||
- (!rhs.valueless_by_exception() &&
- (lhs.index() < rhs.index() ||
- (lhs.index() == rhs.index() &&
- variant::visit_value_at(lhs.index(), less_equal{}, lhs, rhs))));
-#endif
- }
-
- template <typename... Ts>
- inline constexpr bool operator>=(const variant<Ts...> &lhs,
- const variant<Ts...> &rhs) {
- using detail::visitation::variant;
- using lib::greater_equal;
-#ifdef MPARK_CPP14_CONSTEXPR
- if (rhs.valueless_by_exception()) return true;
- if (lhs.valueless_by_exception()) return false;
- if (lhs.index() > rhs.index()) return true;
- if (lhs.index() < rhs.index()) return false;
- return variant::visit_value_at(lhs.index(), greater_equal{}, lhs, rhs);
-#else
- return rhs.valueless_by_exception() ||
- (!lhs.valueless_by_exception() &&
- (lhs.index() > rhs.index() ||
- (lhs.index() == rhs.index() &&
- variant::visit_value_at(
- lhs.index(), greater_equal{}, lhs, rhs))));
-#endif
- }
-
- template <typename Visitor, typename... Vs>
- inline constexpr DECLTYPE_AUTO visit(Visitor &&visitor, Vs &&... vs)
- DECLTYPE_AUTO_RETURN(
- (detail::all(!vs.valueless_by_exception()...)
- ? (void)0
- : throw_bad_variant_access()),
- detail::visitation::variant::visit_value(lib::forward<Visitor>(visitor),
- lib::forward<Vs>(vs)...))
-
- struct monostate {};
-
- inline constexpr bool operator<(monostate, monostate) noexcept {
- return false;
- }
-
- inline constexpr bool operator>(monostate, monostate) noexcept {
- return false;
- }
-
- inline constexpr bool operator<=(monostate, monostate) noexcept {
- return true;
- }
-
- inline constexpr bool operator>=(monostate, monostate) noexcept {
- return true;
- }
-
- inline constexpr bool operator==(monostate, monostate) noexcept {
- return true;
- }
-
- inline constexpr bool operator!=(monostate, monostate) noexcept {
- return false;
- }
-
- template <typename... Ts>
- inline auto swap(variant<Ts...> &lhs,
- variant<Ts...> &rhs) noexcept(noexcept(lhs.swap(rhs)))
- -> decltype(lhs.swap(rhs)) {
- lhs.swap(rhs);
- }
-
- namespace detail {
-
- template <typename T, typename...>
- using enabled_type = T;
-
- namespace hash {
-
- template <typename H, typename K>
- constexpr bool meets_requirements() {
- return std::is_copy_constructible<H>::value &&
- std::is_move_constructible<H>::value &&
- lib::is_invocable_r<std::size_t, H, const K &>::value;
- }
-
- template <typename K>
- constexpr bool is_enabled() {
- using H = std::hash<K>;
- return meets_requirements<H, K>() &&
- std::is_default_constructible<H>::value &&
- std::is_copy_assignable<H>::value &&
- std::is_move_assignable<H>::value;
- }
-
- } // namespace hash
-
- } // namespace detail
-
-#undef AUTO
-#undef AUTO_RETURN
-
-#undef AUTO_REFREF
-#undef AUTO_REFREF_RETURN
-
-#undef DECLTYPE_AUTO
-#undef DECLTYPE_AUTO_RETURN
-
-} // namespace mpark
-
-namespace std {
-
- template <typename... Ts>
- struct hash<mpark::detail::enabled_type<
- mpark::variant<Ts...>,
- mpark::lib::enable_if_t<mpark::lib::all<mpark::detail::hash::is_enabled<
- mpark::lib::remove_const_t<Ts>>()...>::value>>> {
- using argument_type = mpark::variant<Ts...>;
- using result_type = std::size_t;
-
- inline result_type operator()(const argument_type &v) const {
- using mpark::detail::visitation::variant;
- std::size_t result =
- v.valueless_by_exception()
- ? 299792458 // Random value chosen by the universe upon creation
- : variant::visit_alt(
-#ifdef MPARK_GENERIC_LAMBDAS
- [](const auto &alt) {
- using alt_type = mpark::lib::decay_t<decltype(alt)>;
- using value_type = mpark::lib::remove_const_t<
- typename alt_type::value_type>;
- return hash<value_type>{}(alt.value);
- }
-#else
- hasher{}
-#endif
- ,
- v);
- return hash_combine(result, hash<std::size_t>{}(v.index()));
- }
-
- private:
-#ifndef MPARK_GENERIC_LAMBDAS
- struct hasher {
- template <typename Alt>
- inline std::size_t operator()(const Alt &alt) const {
- using alt_type = mpark::lib::decay_t<Alt>;
- using value_type =
- mpark::lib::remove_const_t<typename alt_type::value_type>;
- return hash<value_type>{}(alt.value);
- }
- };
-#endif
-
- static std::size_t hash_combine(std::size_t lhs, std::size_t rhs) {
- return lhs ^= rhs + 0x9e3779b9 + (lhs << 6) + (lhs >> 2);
- }
- };
-
- template <>
- struct hash<mpark::monostate> {
- using argument_type = mpark::monostate;
- using result_type = std::size_t;
-
- inline result_type operator()(const argument_type &) const noexcept {
- return 66740831; // return a fundamentally attractive random value.
- }
- };
-
-} // namespace std
-
-#endif // MPARK_VARIANT_HPP
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