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//===----------------------------------------------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
// UNSUPPORTED: c++98, c++03, c++11, c++14, c++17
// <compare>
// class strong_equality
#include <compare>
#include <type_traits>
#include <cassert>
#include "test_macros.h"
const volatile void* volatile sink;
void test_static_members() {
DoNotOptimize(&std::strong_equality::equal);
DoNotOptimize(&std::strong_equality::nonequal);
DoNotOptimize(&std::strong_equality::equivalent);
DoNotOptimize(&std::strong_equality::nonequivalent);
}
void test_signatures() {
auto& Eq = std::strong_equality::equivalent;
ASSERT_NOEXCEPT(Eq == 0);
ASSERT_NOEXCEPT(0 == Eq);
ASSERT_NOEXCEPT(Eq != 0);
ASSERT_NOEXCEPT(0 != Eq);
#ifndef TEST_HAS_NO_SPACESHIP_OPERATOR
ASSERT_NOEXCEPT(0 <=> Eq);
ASSERT_NOEXCEPT(Eq <=> 0);
ASSERT_SAME_TYPE(decltype(Eq <=> 0), std::strong_equality);
ASSERT_SAME_TYPE(decltype(0 <=> Eq), std::strong_equality);
#endif
}
void test_conversion() {
constexpr std::weak_equality res = std::strong_equality::equivalent;
static_assert(res == 0, "");
static_assert(std::is_convertible<const std::strong_equality&,
std::weak_equality>::value, "");
static_assert(res == 0, "expected equal");
constexpr std::weak_equality neq_res = std::strong_equality::nonequivalent;
static_assert(neq_res != 0, "expected not equal");
}
constexpr bool test_constexpr() {
auto& Eq = std::strong_equality::equal;
auto& NEq = std::strong_equality::nonequal;
auto& Equiv = std::strong_equality::equivalent;
auto& NEquiv = std::strong_equality::nonequivalent;
assert((Eq == 0) == true);
assert((0 == Eq) == true);
assert((Equiv == 0) == true);
assert((0 == Equiv) == true);
assert((NEq == 0) == false);
assert((0 == NEq) == false);
assert((NEquiv == 0) == false);
assert((0 == NEquiv) == false);
assert((Eq != 0) == false);
assert((0 != Eq) == false);
assert((Equiv != 0) == false);
assert((0 != Equiv) == false);
assert((NEq != 0) == true);
assert((0 != NEq) == true);
assert((NEquiv != 0) == true);
assert((0 != NEquiv) == true);
#ifndef TEST_HAS_NO_SPACESHIP_OPERATOR
std::strong_equality res = (Eq <=> 0);
((void)res);
res = (0 <=> Eq);
((void)res);
#endif
return true;
}
int main() {
test_static_members();
test_signatures();
test_conversion();
static_assert(test_constexpr(), "constexpr test failed");
}
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