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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 promise<R>
// void promise<R&>::set_value(R& r);
#include <future>
#include <cassert>
#include "test_macros.h"
int main(int, char**)
{
{
typedef int& T;
int i = 3;
std::promise<T> p;
std::future<T> f = p.get_future();
p.set_value(i);
int& j = f.get();
assert(j == 3);
++i;
assert(j == 4);
#ifndef TEST_HAS_NO_EXCEPTIONS
try
{
p.set_value(i);
assert(false);
}
catch (const std::future_error& e)
{
assert(e.code() == make_error_code(std::future_errc::promise_already_satisfied));
}
#endif
}
return 0;
}
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