| //===----------------------------------------------------------------------===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef LIBCXX_TEST_SUPPORT_BOOLEAN_TESTABLE_H |
| #define LIBCXX_TEST_SUPPORT_BOOLEAN_TESTABLE_H |
| |
| #include "test_macros.h" |
| |
| #if TEST_STD_VER > 17 |
| |
| class BooleanTestable { |
| public: |
| constexpr operator bool() const { |
| return value_; |
| } |
| |
| friend constexpr BooleanTestable operator==(const BooleanTestable& lhs, const BooleanTestable& rhs) { |
| return lhs.value_ == rhs.value_; |
| } |
| |
| friend constexpr BooleanTestable operator!=(const BooleanTestable& lhs, const BooleanTestable& rhs) { |
| return !(lhs == rhs); |
| } |
| |
| constexpr BooleanTestable operator!() { |
| return BooleanTestable{!value_}; |
| } |
| |
| // this class should behave like a bool, so the constructor shouldn't be explicit |
| constexpr BooleanTestable(bool value) : value_{value} {} |
| constexpr BooleanTestable(const BooleanTestable&) = delete; |
| constexpr BooleanTestable(BooleanTestable&&) = delete; |
| |
| private: |
| bool value_; |
| }; |
| |
| template <class T> |
| class StrictComparable { |
| public: |
| // this shouldn't be explicit to make it easier to initlaize inside arrays (which it almost always is) |
| constexpr StrictComparable(T value) : value_{value} {} |
| |
| friend constexpr BooleanTestable operator==(const StrictComparable& lhs, const StrictComparable& rhs) { |
| return (lhs.value_ == rhs.value_); |
| } |
| |
| friend constexpr BooleanTestable operator!=(const StrictComparable& lhs, const StrictComparable& rhs) { |
| return !(lhs == rhs); |
| } |
| |
| private: |
| T value_; |
| }; |
| |
| #endif // TEST_STD_VER > 17 |
| |
| #endif // LIBCXX_TEST_SUPPORT_BOOLEAN_TESTABLE_H |