| 1 | //===----------------------------------------------------------------------===// |
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| 2 | // |
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| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
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| 4 | // See https://llvm.org/LICENSE.txt for license information. |
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| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
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| 6 | // |
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| 7 | //===----------------------------------------------------------------------===// |
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| 8 | |
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| 9 | #ifndef REP_H |
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| 10 | #define REP_H |
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| 11 | |
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| 12 | #include "test_macros.h" |
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| 13 | #include <type_traits> |
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| 14 | |
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| 15 | class Rep |
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| 16 | { |
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| 17 | int data_; |
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| 18 | public: |
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| 19 | TEST_CONSTEXPR Rep() : data_(-1) {} |
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| 20 | explicit TEST_CONSTEXPR Rep(int i) : data_(i) {} |
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| 21 | |
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| 22 | bool TEST_CONSTEXPR operator==(int i) const {return data_ == i;} |
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| 23 | bool TEST_CONSTEXPR operator==(const Rep& r) const {return data_ == r.data_;} |
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| 24 | |
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| 25 | Rep& operator*=(Rep x) {data_ *= x.data_; return *this;} |
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| 26 | Rep& operator/=(Rep x) {data_ /= x.data_; return *this;} |
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| 27 | }; |
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| 28 | |
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| 29 | // This is PR#41130 |
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| 30 | |
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| 31 | struct NotARep {}; |
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| 32 | |
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| 33 | #if TEST_STD_VER >= 11 |
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| 34 | // Several duration operators take a Rep parameter. Before LWG3050 this |
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| 35 | // parameter was constrained to be convertible from a non-const object, |
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| 36 | // but the code always uses a const object. So the function was SFINAE'd |
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| 37 | // away for this type. LWG3050 fixes the constraint to use a const |
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| 38 | // object. |
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| 39 | struct RepConstConvertibleLWG3050 { |
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| 40 | operator long() = delete; |
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| 41 | operator long() const { return 2; } |
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| 42 | }; |
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| 43 | |
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| 44 | template <> |
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| 45 | struct std::common_type<RepConstConvertibleLWG3050, int> { |
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| 46 | using type = long; |
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| 47 | }; |
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| 48 | template <> |
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| 49 | struct std::common_type<int, RepConstConvertibleLWG3050> { |
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| 50 | using type = long; |
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| 51 | }; |
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| 52 | |
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| 53 | #endif // TEST_STD_VER >= 11 |
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| 54 | |
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| 55 | // std::chrono:::duration has only '*', '/' and '%' taking a "Rep" parameter |
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| 56 | |
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| 57 | // Multiplication is commutative, division is not. |
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| 58 | template <class Rep, class Period> |
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| 59 | std::chrono::duration<Rep, Period> |
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| 60 | operator*(std::chrono::duration<Rep, Period> d, NotARep) { return d; } |
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| 61 | |
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| 62 | template <class Rep, class Period> |
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| 63 | std::chrono::duration<Rep, Period> |
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| 64 | operator*(NotARep, std::chrono::duration<Rep, Period> d) { return d; } |
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| 65 | |
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| 66 | template <class Rep, class Period> |
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| 67 | std::chrono::duration<Rep, Period> |
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| 68 | operator/(std::chrono::duration<Rep, Period> d, NotARep) { return d; } |
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| 69 | |
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| 70 | template <class Rep, class Period> |
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| 71 | std::chrono::duration<Rep, Period> |
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| 72 | operator%(std::chrono::duration<Rep, Period> d, NotARep) { return d; } |
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| 73 | |
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| 74 | // op= is not commutative. |
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| 75 | template <class Rep, class Period> |
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| 76 | std::chrono::duration<Rep, Period>& |
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| 77 | operator*=(std::chrono::duration<Rep, Period>& d, NotARep) { return d; } |
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| 78 | |
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| 79 | template <class Rep, class Period> |
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| 80 | std::chrono::duration<Rep, Period>& |
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| 81 | operator/=(std::chrono::duration<Rep, Period>& d, NotARep) { return d; } |
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| 82 | |
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| 83 | template <class Rep, class Period> |
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| 84 | std::chrono::duration<Rep, Period>& |
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| 85 | operator%=(std::chrono::duration<Rep, Period>& d, NotARep) { return d; } |
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| 86 | |
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| 87 | #endif // REP_H |
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| 88 | |
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