1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
|
//
// 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
//
//===----------------------------------------------------------------------===//
// UNSUPPORTED: c++03, c++11, c++14, c++17
// XFAIL: !has-64-bit-atomics
// XFAIL: !has-1024-bit-atomics
// T operator=(T) const noexcept;
#include <atomic>
#include <cassert>
#include <type_traits>
#include "atomic_helpers.h"
#include "test_helper.h"
#include "test_macros.h"
template <typename T>
struct TestAssign {
void operator()() const {
{
T x(T(1));
std::atomic_ref<T> const a(x);
std::same_as<T> decltype(auto) y = (a = T(2));
assert(y == T(2));
assert(x == T(2));
ASSERT_NOEXCEPT(a = T(0));
static_assert(std::is_nothrow_assignable_v<std::atomic_ref<T>, T>);
static_assert(!std::is_copy_assignable_v<std::atomic_ref<T>>);
}
{
auto assign = [](std::atomic_ref<T> const& y, T, T new_val) { y = new_val; };
auto load = [](std::atomic_ref<T> const& y) { return y.load(); };
test_seq_cst<T>(assign, load);
}
}
};
int main(int, char**) {
TestEachAtomicType<TestAssign>()();
return 0;
}
|
