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98 lines
2.6 KiB
C++
98 lines
2.6 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++98, c++03, c++11, c++14, c++17
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// <compare>
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// class strong_equality
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#include <compare>
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#include <type_traits>
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#include <cassert>
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#include "test_macros.h"
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const volatile void* volatile sink;
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void test_static_members() {
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DoNotOptimize(&std::strong_equality::equal);
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DoNotOptimize(&std::strong_equality::nonequal);
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DoNotOptimize(&std::strong_equality::equivalent);
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DoNotOptimize(&std::strong_equality::nonequivalent);
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}
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void test_signatures() {
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auto& Eq = std::strong_equality::equivalent;
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ASSERT_NOEXCEPT(Eq == 0);
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ASSERT_NOEXCEPT(0 == Eq);
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ASSERT_NOEXCEPT(Eq != 0);
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ASSERT_NOEXCEPT(0 != Eq);
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#ifndef TEST_HAS_NO_SPACESHIP_OPERATOR
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ASSERT_NOEXCEPT(0 <=> Eq);
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ASSERT_NOEXCEPT(Eq <=> 0);
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ASSERT_SAME_TYPE(decltype(Eq <=> 0), std::strong_equality);
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ASSERT_SAME_TYPE(decltype(0 <=> Eq), std::strong_equality);
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#endif
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}
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void test_conversion() {
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constexpr std::weak_equality res = std::strong_equality::equivalent;
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static_assert(res == 0, "");
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static_assert(std::is_convertible<const std::strong_equality&,
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std::weak_equality>::value, "");
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static_assert(res == 0, "expected equal");
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constexpr std::weak_equality neq_res = std::strong_equality::nonequivalent;
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static_assert(neq_res != 0, "expected not equal");
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}
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constexpr bool test_constexpr() {
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auto& Eq = std::strong_equality::equal;
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auto& NEq = std::strong_equality::nonequal;
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auto& Equiv = std::strong_equality::equivalent;
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auto& NEquiv = std::strong_equality::nonequivalent;
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assert((Eq == 0) == true);
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assert((0 == Eq) == true);
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assert((Equiv == 0) == true);
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assert((0 == Equiv) == true);
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assert((NEq == 0) == false);
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assert((0 == NEq) == false);
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assert((NEquiv == 0) == false);
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assert((0 == NEquiv) == false);
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assert((Eq != 0) == false);
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assert((0 != Eq) == false);
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assert((Equiv != 0) == false);
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assert((0 != Equiv) == false);
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assert((NEq != 0) == true);
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assert((0 != NEq) == true);
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assert((NEquiv != 0) == true);
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assert((0 != NEquiv) == true);
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#ifndef TEST_HAS_NO_SPACESHIP_OPERATOR
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std::strong_equality res = (Eq <=> 0);
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((void)res);
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res = (0 <=> Eq);
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((void)res);
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#endif
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return true;
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}
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int main(int, char**) {
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test_static_members();
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test_signatures();
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test_conversion();
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static_assert(test_constexpr(), "constexpr test failed");
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return 0;
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}
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