/** 12.6.4 check for more properties of 'for-in' statement. */
@Override
public void visit(HasNextPropertyNode n, State state) {
Value v =
UnknownValueResolver.getRealValue(state.readRegister(n.getPropertyListRegister()), state);
Value res =
!v.isNotStr()
? Value.makeBool(true)
: Value.makeNone(); // string values represent property names
if (v.isMaybeNull()) // null marks end-of-list
res = res.joinBool(false);
state.writeRegister(n.getResultRegister(), res);
}
