/**
* Pops two terms, constructs an Evaluation from these terms, and pushes it.
*
* @param Assembly the assembly to work on
*/
public void workOn(Assembly a) {
Term second = (Term) a.pop();
Term first = (Term) a.pop();
a.push(new Evaluation(first, second));
}
/** Demonstrate that this utility class does not loop. */
public static void main(String args[]) {
IParser e = new MidiParser().expression();
Assembly out = e.bestMatch(new TokenAssembly("111 - (11 - 1)"));
System.out.println(out.pop());
}