import java_cup.runtime.*;
import hw2.IntPair;
import Common.Listing;

terminal Integer number;
terminal         plus, minus, sum, product, times, negate, mean;
terminal         lparen, rparen;

non terminal Integer  Program, File, Lists, List, Expression;
non terminal Integer  Operand1, Operand2, Atom, Operand, Operands;

start with Program;

Program
	::= File
	;

File   
	::= Lists
	;

Lists
	::= Lists List:L
		{: Listing.get().EmitMessage("Value: " + L.intValue()); :}
	|   List:L
		{: Listing.get().EmitMessage("Value: " + L.intValue()); :}
	;

List
	::= lparen Expression:Ex rparen
		{: RESULT = new Integer(0); :}
	;

Expression
	::= plus    Operand1:Op1 Operand2:Op2
		{: RESULT = new Integer(0); :}
	|   minus   Operand1:Op1 Operand2:Op2
		{: RESULT = new Integer(0); :}
	|   times   Operand1:Op1 Operand2:Op2
		{: RESULT = new Integer(0); :}
	|   negate  Operand:Op
		{: RESULT = new Integer(0); :}
	|   sum     Operands:SOs
		{: RESULT = new Integer(0); :}
	|   product Operands:POs
		{: RESULT = new Integer(0); :}
	|   mean    Operands:MOs
		{: RESULT = new Integer(0); :}
	;

Operand1
	::= Atom:At
		{: RESULT = new Integer(0); :}
	;

Operand2
	::= Atom:At
		{: RESULT = new Integer(0); :}
	;

Operand
	::= Atom:At
		{: RESULT = new Integer(0); :}
	;

Operands
	::= Operands:Ops Operand:Op
		{: RESULT = new Integer(0); :}
	|   Operand:Op
		{: RESULT = new Integer(0); :}
	;

Atom
	::= List:L
		{: RESULT = L; :}
	|   number:nu
		{: RESULT = nu; :}
	;