//===----------------------------------------------------------------------===//
//
// 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
// <coroutine>
// template <class Promise = void>
// struct coroutine_handle;
// coroutine_handle& operator=(nullptr_t) noexcept
#include <coroutine>
#include <cassert>
#include <cstddef>
#include <type_traits>
#include "test_macros.h"
template <class C>
void do_test() {
int dummy = 42;
void* dummy_h = &dummy;
{
static_assert(std::is_nothrow_assignable<C&, std::nullptr_t>::value, "");
static_assert(!std::is_assignable<C&, void*>::value, "");
}
{
C c = C::from_address(dummy_h);
assert(c.address() == &dummy);
c = nullptr;
assert(c.address() == nullptr);
c = nullptr;
assert(c.address() == nullptr);
}
{
C c;
C& cr = (c = nullptr);
assert(&c == &cr);
}
}
int main(int, char**)
{
do_test<std::coroutine_handle<>>();
do_test<std::coroutine_handle<int>>();
return 0;
}