1// -*- C++ -*-
2//===----------------------------------------------------------------------===//
3//
4// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
5// See https://llvm.org/LICENSE.txt for license information.
6// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
7//
8//===----------------------------------------------------------------------===//
9
10#ifndef _LIBCPP_UTILITY
11#define _LIBCPP_UTILITY
12
13/*
14 utility synopsis
15
16#include <initializer_list>
17
18namespace std
19{
20
21template <class T>
22 void
23 swap(T& a, T& b);
24
25namespace rel_ops
26{
27 template<class T> bool operator!=(const T&, const T&);
28 template<class T> bool operator> (const T&, const T&);
29 template<class T> bool operator<=(const T&, const T&);
30 template<class T> bool operator>=(const T&, const T&);
31}
32
33template<class T>
34void
35swap(T& a, T& b) noexcept(is_nothrow_move_constructible<T>::value &&
36 is_nothrow_move_assignable<T>::value);
37
38template <class T, size_t N>
39void
40swap(T (&a)[N], T (&b)[N]) noexcept(noexcept(swap(*a, *b)));
41
42template <class T> T&& forward(typename remove_reference<T>::type& t) noexcept; // constexpr in C++14
43template <class T> T&& forward(typename remove_reference<T>::type&& t) noexcept; // constexpr in C++14
44
45template <class T> typename remove_reference<T>::type&& move(T&&) noexcept; // constexpr in C++14
46
47template <class T>
48 typename conditional
49 <
50 !is_nothrow_move_constructible<T>::value && is_copy_constructible<T>::value,
51 const T&,
52 T&&
53 >::type
54 move_if_noexcept(T& x) noexcept; // constexpr in C++14
55
56template <class T> constexpr add_const_t<T>& as_const(T& t) noexcept; // C++17
57template <class T> void as_const(const T&&) = delete; // C++17
58
59template <class T> typename add_rvalue_reference<T>::type declval() noexcept;
60
61template<class T, class U> constexpr bool cmp_equal(T t, U u) noexcept; // C++20
62template<class T, class U> constexpr bool cmp_not_equal(T t, U u) noexcept; // C++20
63template<class T, class U> constexpr bool cmp_less(T t, U u) noexcept; // C++20
64template<class T, class U> constexpr bool cmp_greater(T t, U u) noexcept; // C++20
65template<class T, class U> constexpr bool cmp_less_equal(T t, U u) noexcept; // C++20
66template<class T, class U> constexpr bool cmp_greater_equal(T t, U u) noexcept; // C++20
67template<class R, class T> constexpr bool in_range(T t) noexcept; // C++20
68
69template <class T1, class T2>
70struct pair
71{
72 typedef T1 first_type;
73 typedef T2 second_type;
74
75 T1 first;
76 T2 second;
77
78 pair(const pair&) = default;
79 pair(pair&&) = default;
80 explicit(see-below) constexpr pair();
81 explicit(see-below) pair(const T1& x, const T2& y); // constexpr in C++14
82 template <class U = T1, class V = T2> explicit(see-below) pair(U&&, V&&); // constexpr in C++14
83 template <class U, class V> explicit(see-below) pair(const pair<U, V>& p); // constexpr in C++14
84 template <class U, class V> explicit(see-below) pair(pair<U, V>&& p); // constexpr in C++14
85 template <class... Args1, class... Args2>
86 pair(piecewise_construct_t, tuple<Args1...> first_args,
87 tuple<Args2...> second_args); // constexpr in C++20
88
89 template <class U, class V> pair& operator=(const pair<U, V>& p); // constexpr in C++20
90 pair& operator=(pair&& p) noexcept(is_nothrow_move_assignable<T1>::value &&
91 is_nothrow_move_assignable<T2>::value); // constexpr in C++20
92 template <class U, class V> pair& operator=(pair<U, V>&& p); // constexpr in C++20
93
94 void swap(pair& p) noexcept(is_nothrow_swappable_v<T1> &&
95 is_nothrow_swappable_v<T2>); // constexpr in C++20
96};
97
98template<class T1, class T2, class U1, class U2, template<class> class TQual, template<class> class UQual>
99struct basic_common_reference<pair<T1, T2>, pair<U1, U2>, TQual, UQual>; // since C++23
100
101template<class T1, class T2, class U1, class U2>
102struct common_type<pair<T1, T2>, pair<U1, U2>>; // since C++23
103
104template<class T1, class T2> pair(T1, T2) -> pair<T1, T2>;
105
106template <class T1, class T2> bool operator==(const pair<T1,T2>&, const pair<T1,T2>&); // constexpr in C++14
107template <class T1, class T2> bool operator!=(const pair<T1,T2>&, const pair<T1,T2>&); // constexpr in C++14, removed in C++20
108template <class T1, class T2> bool operator< (const pair<T1,T2>&, const pair<T1,T2>&); // constexpr in C++14, removed in C++20
109template <class T1, class T2> bool operator> (const pair<T1,T2>&, const pair<T1,T2>&); // constexpr in C++14, removed in C++20
110template <class T1, class T2> bool operator>=(const pair<T1,T2>&, const pair<T1,T2>&); // constexpr in C++14, removed in C++20
111template <class T1, class T2> bool operator<=(const pair<T1,T2>&, const pair<T1,T2>&); // constexpr in C++14, removed in C++20
112template <class T1, class T2>
113 constexpr common_comparison_type_t<synth-three-way-result<T1>,
114 synth-three-way-result<T2>>
115 operator<=>(const pair<T1,T2>&, const pair<T1,T2>&); // C++20
116
117template <class T1, class T2> pair<V1, V2> make_pair(T1&&, T2&&); // constexpr in C++14
118template <class T1, class T2>
119void
120swap(pair<T1, T2>& x, pair<T1, T2>& y) noexcept(noexcept(x.swap(y))); // constexpr in C++20
121
122struct piecewise_construct_t { explicit piecewise_construct_t() = default; };
123inline constexpr piecewise_construct_t piecewise_construct = piecewise_construct_t();
124
125template <class T> struct tuple_size;
126template <size_t I, class T> struct tuple_element;
127
128template <class T1, class T2> struct tuple_size<pair<T1, T2> >;
129template <class T1, class T2> struct tuple_element<0, pair<T1, T2> >;
130template <class T1, class T2> struct tuple_element<1, pair<T1, T2> >;
131
132template<size_t I, class T1, class T2>
133 typename tuple_element<I, pair<T1, T2> >::type&
134 get(pair<T1, T2>&) noexcept; // constexpr in C++14
135
136template<size_t I, class T1, class T2>
137 const typename tuple_element<I, pair<T1, T2> >::type&
138 get(const pair<T1, T2>&) noexcept; // constexpr in C++14
139
140template<size_t I, class T1, class T2>
141 typename tuple_element<I, pair<T1, T2> >::type&&
142 get(pair<T1, T2>&&) noexcept; // constexpr in C++14
143
144template<size_t I, class T1, class T2>
145 const typename tuple_element<I, pair<T1, T2> >::type&&
146 get(const pair<T1, T2>&&) noexcept; // constexpr in C++14
147
148template<class T1, class T2>
149 constexpr T1& get(pair<T1, T2>&) noexcept; // C++14
150
151template<class T1, class T2>
152 constexpr const T1& get(const pair<T1, T2>&) noexcept; // C++14
153
154template<class T1, class T2>
155 constexpr T1&& get(pair<T1, T2>&&) noexcept; // C++14
156
157template<class T1, class T2>
158 constexpr const T1&& get(const pair<T1, T2>&&) noexcept; // C++14
159
160template<class T1, class T2>
161 constexpr T1& get(pair<T2, T1>&) noexcept; // C++14
162
163template<class T1, class T2>
164 constexpr const T1& get(const pair<T2, T1>&) noexcept; // C++14
165
166template<class T1, class T2>
167 constexpr T1&& get(pair<T2, T1>&&) noexcept; // C++14
168
169template<class T1, class T2>
170 constexpr const T1&& get(const pair<T2, T1>&&) noexcept; // C++14
171
172// C++14
173
174template<class T, T... I>
175struct integer_sequence
176{
177 typedef T value_type;
178
179 static constexpr size_t size() noexcept;
180};
181
182template<size_t... I>
183 using index_sequence = integer_sequence<size_t, I...>;
184
185template<class T, T N>
186 using make_integer_sequence = integer_sequence<T, 0, 1, ..., N-1>;
187template<size_t N>
188 using make_index_sequence = make_integer_sequence<size_t, N>;
189
190template<class... T>
191 using index_sequence_for = make_index_sequence<sizeof...(T)>;
192
193template<class T, class U=T>
194 constexpr T exchange(T& obj, U&& new_value)
195 noexcept(is_nothrow_move_constructible<T>::value && is_nothrow_assignable<T&, U>::value); // constexpr in C++17, noexcept in C++23
196
197// 20.2.7, in-place construction // C++17
198struct in_place_t {
199 explicit in_place_t() = default;
200};
201inline constexpr in_place_t in_place{};
202template <class T>
203 struct in_place_type_t {
204 explicit in_place_type_t() = default;
205 };
206template <class T>
207 inline constexpr in_place_type_t<T> in_place_type{};
208template <size_t I>
209 struct in_place_index_t {
210 explicit in_place_index_t() = default;
211 };
212template <size_t I>
213 inline constexpr in_place_index_t<I> in_place_index{};
214
215// [utility.underlying], to_underlying
216template <class T>
217 constexpr underlying_type_t<T> to_underlying( T value ) noexcept; // C++2b
218
219} // std
220
221*/
222
223#include <__assert> // all public C++ headers provide the assertion handler
224#include <__config>
225#include <__tuple>
226#include <__utility/as_const.h>
227#include <__utility/auto_cast.h>
228#include <__utility/cmp.h>
229#include <__utility/declval.h>
230#include <__utility/exchange.h>
231#include <__utility/forward.h>
232#include <__utility/in_place.h>
233#include <__utility/integer_sequence.h>
234#include <__utility/move.h>
235#include <__utility/pair.h>
236#include <__utility/piecewise_construct.h>
237#include <__utility/priority_tag.h>
238#include <__utility/rel_ops.h>
239#include <__utility/swap.h>
240#include <__utility/to_underlying.h>
241#include <__utility/transaction.h>
242#include <__utility/unreachable.h>
243#include <type_traits>
244#include <version>
245
246#ifndef _LIBCPP_REMOVE_TRANSITIVE_INCLUDES
247# include <iosfwd>
248#endif
249
250// standard-mandated includes
251#include <compare>
252#include <initializer_list>
253
254#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
255# pragma GCC system_header
256#endif
257
258#endif // _LIBCPP_UTILITY
259

source code of flutter_engine/third_party/libcxx/include/utility