2e43a304f1
| | old time | new time | | ------------------ | -------- | -------- | | functional - c++23 | 416ms | 225ms | | random - c++23 | 513ms | 392ms | | vector - c++17 | 206ms | 100ms |
52 lines
1.3 KiB
C++
52 lines
1.3 KiB
C++
//
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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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// XFAIL: !has-64-bit-atomics
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// XFAIL: !has-1024-bit-atomics
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// T operator=(T) const noexcept;
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#include <atomic>
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#include <cassert>
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#include <concepts>
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#include <type_traits>
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#include "atomic_helpers.h"
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#include "test_helper.h"
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#include "test_macros.h"
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template <typename T>
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struct TestAssign {
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void operator()() const {
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{
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T x(T(1));
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std::atomic_ref<T> const a(x);
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std::same_as<T> decltype(auto) y = (a = T(2));
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assert(y == T(2));
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assert(x == T(2));
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ASSERT_NOEXCEPT(a = T(0));
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static_assert(std::is_nothrow_assignable_v<std::atomic_ref<T>, T>);
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static_assert(!std::is_copy_assignable_v<std::atomic_ref<T>>);
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}
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{
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auto assign = [](std::atomic_ref<T> const& y, T, T new_val) { y = new_val; };
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auto load = [](std::atomic_ref<T> const& y) { return y.load(); };
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test_seq_cst<T>(assign, load);
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}
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}
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};
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int main(int, char**) {
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TestEachAtomicType<TestAssign>()();
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return 0;
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}
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