| 1 | //===----------------------------------------------------------------------===// |
|---|---|
| 2 | // |
| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| 4 | // See https://llvm.org/LICENSE.txt for license information. |
| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| 6 | // |
| 7 | //===----------------------------------------------------------------------===// |
| 8 | |
| 9 | #ifndef EMPLACEABLE_H |
| 10 | #define EMPLACEABLE_H |
| 11 | |
| 12 | #include <functional> |
| 13 | #include "test_macros.h" |
| 14 | |
| 15 | #if TEST_STD_VER >= 11 |
| 16 | |
| 17 | class Emplaceable { |
| 18 | TEST_CONSTEXPR Emplaceable(const Emplaceable&); |
| 19 | TEST_CONSTEXPR_CXX14 Emplaceable& operator=(const Emplaceable&); |
| 20 | |
| 21 | int int_; |
| 22 | double double_; |
| 23 | |
| 24 | public: |
| 25 | TEST_CONSTEXPR Emplaceable() : int_(0), double_(0) {} |
| 26 | TEST_CONSTEXPR Emplaceable(int i, double d) : int_(i), double_(d) {} |
| 27 | TEST_CONSTEXPR_CXX14 Emplaceable(Emplaceable&& x) : int_(x.int_), double_(x.double_) { |
| 28 | x.int_ = 0; |
| 29 | x.double_ = 0; |
| 30 | } |
| 31 | TEST_CONSTEXPR_CXX14 Emplaceable& operator=(Emplaceable&& x) { |
| 32 | int_ = x.int_; |
| 33 | x.int_ = 0; |
| 34 | double_ = x.double_; |
| 35 | x.double_ = 0; |
| 36 | return *this; |
| 37 | } |
| 38 | |
| 39 | TEST_CONSTEXPR bool operator==(const Emplaceable& x) const { return int_ == x.int_ && double_ == x.double_; } |
| 40 | TEST_CONSTEXPR bool operator<(const Emplaceable& x) const { |
| 41 | return int_ < x.int_ || (int_ == x.int_ && double_ < x.double_); |
| 42 | } |
| 43 | |
| 44 | TEST_CONSTEXPR int get() const { return int_; } |
| 45 | }; |
| 46 | |
| 47 | template <> |
| 48 | struct std::hash<Emplaceable> { |
| 49 | typedef Emplaceable argument_type; |
| 50 | typedef std::size_t result_type; |
| 51 | |
| 52 | TEST_CONSTEXPR std::size_t operator()(const Emplaceable& x) const { return static_cast<std::size_t>(x.get()); } |
| 53 | }; |
| 54 | |
| 55 | #endif // TEST_STD_VER >= 11 |
| 56 | #endif // EMPLACEABLE_H |
| 57 |