if (stopped) {
return;
}
//System.out.println(this + " -- stack = " + stack);
RippleValue first = arg.getFirst();
//System.out.println( " first.isActive() = " + first.isActive() );
//System.out.println(" first = " + stack.getFirst());
if (null != first.getMapping()) {
RippleList rest = arg.getRest();
//System.out.println(" rest = " + rest);
final StackMapping f = first.getMapping();
//System.out.println(" f = " + f);
//System.out.println(" f.arity() = " + f.arity());
// Nullary functions don't need their argument stacks reduced.
// They shouldn't even care if the stack is empty.