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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++03
// <future>
// class promise<R>
// promise& operator=(promise&& rhs);
#include <future>
#include <cassert>
#include "test_macros.h"
#include "test_allocator.h"
int main(int, char**)
{
assert(test_alloc_base::alloc_count == 0);
{
std::promise<int> p0(std::allocator_arg, test_allocator<int>());
std::promise<int> p(std::allocator_arg, test_allocator<int>());
assert(test_alloc_base::alloc_count == 2);
p = std::move(p0);
assert(test_alloc_base::alloc_count == 1);
std::future<int> f = p.get_future();
assert(test_alloc_base::alloc_count == 1);
assert(f.valid());
#ifndef TEST_HAS_NO_EXCEPTIONS
try
{
f = p0.get_future();
assert(false);
}
catch (const std::future_error& e)
{
assert(e.code() == make_error_code(std::future_errc::no_state));
}
#endif
assert(test_alloc_base::alloc_count == 1);
}
assert(test_alloc_base::alloc_count == 0);
{
std::promise<int&> p0(std::allocator_arg, test_allocator<int>());
std::promise<int&> p(std::allocator_arg, test_allocator<int>());
assert(test_alloc_base::alloc_count == 2);
p = std::move(p0);
assert(test_alloc_base::alloc_count == 1);
std::future<int&> f = p.get_future();
assert(test_alloc_base::alloc_count == 1);
assert(f.valid());
#ifndef TEST_HAS_NO_EXCEPTIONS
try
{
f = p0.get_future();
assert(false);
}
catch (const std::future_error& e)
{
assert(e.code() == make_error_code(std::future_errc::no_state));
}
#endif
assert(test_alloc_base::alloc_count == 1);
}
assert(test_alloc_base::alloc_count == 0);
{
std::promise<void> p0(std::allocator_arg, test_allocator<void>());
std::promise<void> p(std::allocator_arg, test_allocator<void>());
assert(test_alloc_base::alloc_count == 2);
p = std::move(p0);
assert(test_alloc_base::alloc_count == 1);
std::future<void> f = p.get_future();
assert(test_alloc_base::alloc_count == 1);
assert(f.valid());
#ifndef TEST_HAS_NO_EXCEPTIONS
try
{
f = p0.get_future();
assert(false);
}
catch (const std::future_error& e)
{
assert(e.code() == make_error_code(std::future_errc::no_state));
}
#endif
assert(test_alloc_base::alloc_count == 1);
}
assert(test_alloc_base::alloc_count == 0);
return 0;
}
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