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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
// <experimental/coroutine>
// template <class Promise = void>
// struct coroutine_handle;
// constexpr explicit operator bool() const noexcept
#include <experimental/coroutine>
#include <type_traits>
#include <cassert>
#include "test_macros.h"
namespace coro = std::experimental;
template <class C>
void do_test() {
static_assert(std::is_nothrow_constructible<bool, C>::value, "");
static_assert(!std::is_convertible<C, bool>::value, "");
{
constexpr C c; ((void)c);
static_assert(bool(c) == false, "");
}
{ // null case
const C c = {}; ((void)c);
ASSERT_NOEXCEPT(bool(c));
if (c)
assert(false);
else
assert(true);
assert(c.address() == nullptr);
assert(bool(c) == false);
}
{ // non-null case
char dummy = 42;
C c = C::from_address((void*)&dummy);
assert(c.address() == &dummy);
assert(bool(c) == true);
}
}
int main()
{
do_test<coro::coroutine_handle<>>();
do_test<coro::coroutine_handle<int>>();
}
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