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// { dg-do run }
#if __has_include(<coroutine>)
#include <coroutine>
#else
#include <experimental/coroutine>
namespace std {
using namespace std::experimental;
}
#endif
#include <cstdlib>
template <typename T>
struct generator{
struct promise_type;
using coro_handle = std::coroutine_handle<promise_type>;
struct promise_type{
std::suspend_always yield_value (T value){
value_ = value;
return {};
}
std::suspend_always initial_suspend (){
return {};
}
std::suspend_always final_suspend () noexcept {
return {};
}
std::suspend_never return_void()
{
return {};
}
generator get_return_object () {
return {coro_handle::from_promise(*this)};
}
void unhandled_exception () {
return;
}
T value_;
};
coro_handle handle;
generator(coro_handle h)
:handle(h)
{}
~generator(){
if(handle)
handle.destroy();
}
bool resume(){
if(not handle.done())
handle.resume();
return not handle.done();
};
T get () {
return handle.promise().value_;
}
};
namespace A
{
}
generator<int>
parse()
{
namespace B = A;
co_yield 1;
}
int main()
{
auto gen = parse();
gen.handle.resume (); /* init suspend. */
if (gen.get() != 1)
abort ();
return 0;
}
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