// Naive version of throwing a non-local exception from a coroutine.
// There are better ways...
#include <iostream>
using namespace std;

struct E {};

_Coroutine C {
    bool error;
    void main() {
	try {
	    error = false;
	    throw E();
	} catch( E ) {
	    error = true;
	} // catch
    } // main
    public:
    void mem() {
	resume();
	if ( error ) throw E();
    } // mem
};

int main() {
    C c;
    try {
       c.mem();
    } catch( E ) {
       cout << "caught E" << endl;
    } // catch
} // main