// Shows local versus non-local resumption EHM.
#include <iostream>
#include <sstream>
#include <iomanip>
#include <string>
using namespace std;

_Event ev {};

_Coroutine X {
    X * partner;
    string name;
    static int id;
    int myid;
    void main();
   public:
    X(X *partner);
    void next() { 
	cout << uThisCoroutine().getName() << " before resume" << endl;
	resume();
	cout << uThisCoroutine().getName() << " after resume" << endl;
    }
};

int X::id = 0;

X::X(X *partner) : partner( partner ), myid( id ) { id += 1; resume();}
void X::main() {
    ostringstream convert;
    convert << myid;
    name = convert.str();
    setName( name.c_str() );
    suspend();
    cout << getName() << " starting" << endl;
    try {
	_Enable {
	    if ( partner != NULL ) partner->next();
	    else suspend();
	    cout << getName() << " continuing" << endl;
	    if ( myid == 1 ) {
		cout << getName() << " throwing exception "<< endl;
#ifdef AT
		_Resume ev() _At *partner;
		partner->next();
#else
		_Resume ev();
		cout << getName() << " after throwing exception "<< endl;
#endif
	    } // if
	} // _Enable
    } _CatchResume( ev ) {
	cout << getName() << " receiving exception" << endl;
    } // catch
} // X::main
	
int main() {
    string name = "program main";
    uThisCoroutine().setName( name.c_str() );
    X x0( NULL );
    X x1( &x0 );
    X x2( &x1 );
    x2.next();
} // main