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88 lines
2.7 KiB
C++
88 lines
2.7 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#ifndef REP_H
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#define REP_H
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#include "test_macros.h"
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#include <type_traits>
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class Rep
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{
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int data_;
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public:
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TEST_CONSTEXPR Rep() : data_(-1) {}
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explicit TEST_CONSTEXPR Rep(int i) : data_(i) {}
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bool TEST_CONSTEXPR operator==(int i) const {return data_ == i;}
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bool TEST_CONSTEXPR operator==(const Rep& r) const {return data_ == r.data_;}
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Rep& operator*=(Rep x) {data_ *= x.data_; return *this;}
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Rep& operator/=(Rep x) {data_ /= x.data_; return *this;}
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};
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// This is PR#41130
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struct NotARep {};
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#if TEST_STD_VER >= 11
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// Several duration operators take a Rep parameter. Before LWG3050 this
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// parameter was constrained to be convertible from a non-const object,
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// but the code always uses a const object. So the function was SFINAE'd
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// away for this type. LWG3050 fixes the constraint to use a const
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// object.
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struct RepConstConvertibleLWG3050 {
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operator long() = delete;
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operator long() const { return 2; }
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};
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template <>
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struct std::common_type<RepConstConvertibleLWG3050, int> {
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using type = long;
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};
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template <>
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struct std::common_type<int, RepConstConvertibleLWG3050> {
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using type = long;
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};
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#endif // TEST_STD_VER >= 11
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// std::chrono:::duration has only '*', '/' and '%' taking a "Rep" parameter
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// Multiplication is commutative, division is not.
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template <class Rep, class Period>
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std::chrono::duration<Rep, Period>
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operator*(std::chrono::duration<Rep, Period> d, NotARep) { return d; }
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template <class Rep, class Period>
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std::chrono::duration<Rep, Period>
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operator*(NotARep, std::chrono::duration<Rep, Period> d) { return d; }
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template <class Rep, class Period>
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std::chrono::duration<Rep, Period>
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operator/(std::chrono::duration<Rep, Period> d, NotARep) { return d; }
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template <class Rep, class Period>
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std::chrono::duration<Rep, Period>
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operator%(std::chrono::duration<Rep, Period> d, NotARep) { return d; }
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// op= is not commutative.
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template <class Rep, class Period>
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std::chrono::duration<Rep, Period>&
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operator*=(std::chrono::duration<Rep, Period>& d, NotARep) { return d; }
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template <class Rep, class Period>
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std::chrono::duration<Rep, Period>&
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operator/=(std::chrono::duration<Rep, Period>& d, NotARep) { return d; }
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template <class Rep, class Period>
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std::chrono::duration<Rep, Period>&
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operator%=(std::chrono::duration<Rep, Period>& d, NotARep) { return d; }
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#endif // REP_H
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