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// -*- C++ -*-
//===----------------------------------------------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
// UNSUPPORTED: c++98, c++03, c++11
// REQUIRES: fcoroutines-ts
// RUN: %build -fcoroutines-ts
// RUN: %run
// <experimental/coroutine>
// template <class Promise = void>
// struct coroutine_handle;
// coroutine_handle& operator=(nullptr_t) noexcept
#include <experimental/coroutine>
#include <type_traits>
#include <cassert>
namespace coro = std::experimental;
template <class C>
void do_test() {
int dummy = 42;
void* dummy_h = &dummy;
{
C c; ((void)c);
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()
{
do_test<coro::coroutine_handle<>>();
do_test<coro::coroutine_handle<int>>();
}
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