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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
//
//===----------------------------------------------------------------------===//
//
// UNSUPPORTED: libcpp-has-no-threads
// UNSUPPORTED: c++98, c++03
// <future>
// class shared_future<R>
// shared_future& operator=(const shared_future& rhs);
// noexcept in C++17
#include <future>
#include <cassert>
#include "test_macros.h"
int main(int, char**)
{
{
typedef int T;
std::promise<T> p;
std::shared_future<T> f0 = p.get_future();
std::shared_future<T> f;
f = f0;
#if TEST_STD_VER > 14
static_assert(noexcept(f = f0), "" );
#endif
assert(f0.valid());
assert(f.valid());
}
{
typedef int T;
std::shared_future<T> f0;
std::shared_future<T> f;
f = f0;
assert(!f0.valid());
assert(!f.valid());
}
{
typedef int& T;
std::promise<T> p;
std::shared_future<T> f0 = p.get_future();
std::shared_future<T> f;
f = f0;
assert(f0.valid());
assert(f.valid());
}
{
typedef int& T;
std::shared_future<T> f0;
std::shared_future<T> f;
f = f0;
assert(!f0.valid());
assert(!f.valid());
}
{
typedef void T;
std::promise<T> p;
std::shared_future<T> f0 = p.get_future();
std::shared_future<T> f;
f = f0;
assert(f0.valid());
assert(f.valid());
}
{
typedef void T;
std::shared_future<T> f0;
std::shared_future<T> f;
f = f0;
assert(!f0.valid());
assert(!f.valid());
}
return 0;
}
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