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//===----------------------------------------------------------------------===//
//
// 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
//
//===----------------------------------------------------------------------===//
// <vector>
// reference& operator=(const reference&)
#include <cassert>
#include <vector>
#include "test_macros.h"
TEST_CONSTEXPR_CXX20 bool test() {
std::vector<bool> vec;
typedef std::vector<bool>::reference Ref;
vec.push_back(true);
vec.push_back(false);
Ref ref1 = vec[0];
Ref ref2 = vec[1];
ref2 = ref1;
// Ref&
{
vec[0] = false;
vec[1] = true;
ref1 = ref2;
assert(vec[0]);
assert(vec[1]);
}
{
vec[0] = true;
vec[1] = false;
ref1 = ref2;
assert(!vec[0]);
assert(!vec[1]);
}
// Ref&&
{
vec[0] = false;
vec[1] = true;
ref1 = std::move(ref2);
assert(vec[0]);
assert(vec[1]);
}
{
vec[0] = true;
vec[1] = false;
ref1 = std::move(ref2);
assert(!vec[0]);
assert(!vec[1]);
}
// const Ref&
{
vec[0] = false;
vec[1] = true;
ref1 = static_cast<const Ref&>(ref2);
assert(vec[0]);
assert(vec[1]);
}
{
vec[0] = true;
vec[1] = false;
ref1 = static_cast<const Ref&>(ref2);
assert(!vec[0]);
assert(!vec[1]);
}
return true;
}
int main(int, char**) {
test();
#if TEST_STD_VER > 17
static_assert(test());
#endif
return 0;
}
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