// Try cancelling a coroutine.

#include <fstream.hfa>
#include <coroutine.hfa>

exception internal_error {};
vtable(internal_error) internal_vt;

coroutine WillCancel {};

const char * msg(CoroutineCancelled(WillCancel) * this) {
	return "CoroutineCancelled(WillCancel)";
}

void main(WillCancel & wc) {
	sout | '1';
	cancel_stack((internal_error){&internal_vt});
	sout | '!';
}

int main(int argc, char * argv[]) {
	sout | nlOff;
	WillCancel cancel;
	try {
		sout | '0';
		resume(cancel);
		sout | '4';
	} catchResume (CoroutineCancelled(WillCancel) * error) {
		sout | '2';
		if ((virtual internal_error *)error->the_exception) {
			sout | '3';
		}
	}
	sout | '5' | nl;
}