03cda77409
Implements parts of **P1614R2**: https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2019/p1614r2.html - Implemented `operator<=>` for `optional` - Updated "optional synopsis" to match the current draft https://eel.is/c++draft/optional closer - Implemented https://cplusplus.github.io/LWG/issue3566 - Implemented https://cplusplus.github.io/LWG/issue3746 Reviewed By: #libc, philnik, ldionne Differential Revision: https://reviews.llvm.org/D146392
70 lines
2.1 KiB
C++
70 lines
2.1 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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// UNSUPPORTED: c++03, c++11, c++14, c++17
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// <optional>
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// [optional.relops], relational operators
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// template<class T, three_way_comparable_with<T> U>
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// constexpr compare_three_way_result_t<T, U>
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// operator<=>(const optional<T>&, const optional<U>&);
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#include <cassert>
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#include <compare>
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#include <optional>
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#include "test_comparisons.h"
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constexpr bool test() {
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{
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std::optional<int> op1;
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std::optional<int> op2;
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assert((op1 <=> op2) == std::strong_ordering::equal);
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assert(testOrder(op1, op2, std::strong_ordering::equal));
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}
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{
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std::optional<int> op1{3};
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std::optional<int> op2{3};
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assert((op1 <=> op1) == std::strong_ordering::equal);
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assert(testOrder(op1, op1, std::strong_ordering::equal));
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assert((op1 <=> op2) == std::strong_ordering::equal);
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assert(testOrder(op1, op2, std::strong_ordering::equal));
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assert((op2 <=> op1) == std::strong_ordering::equal);
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assert(testOrder(op2, op1, std::strong_ordering::equal));
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}
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{
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std::optional<int> op;
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std::optional<int> op1{2};
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std::optional<int> op2{3};
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assert((op <=> op2) == std::strong_ordering::less);
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assert(testOrder(op, op2, std::strong_ordering::less));
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assert((op1 <=> op2) == std::strong_ordering::less);
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assert(testOrder(op1, op2, std::strong_ordering::less));
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}
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{
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std::optional<int> op;
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std::optional<int> op1{3};
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std::optional<int> op2{2};
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assert((op1 <=> op) == std::strong_ordering::greater);
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assert(testOrder(op1, op, std::strong_ordering::greater));
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assert((op1 <=> op2) == std::strong_ordering::greater);
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assert(testOrder(op1, op2, std::strong_ordering::greater));
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}
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return true;
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}
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int main(int, char**) {
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assert(test());
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static_assert(test());
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return 0;
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}
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