//Value:top//
//Value:import//
import java.util.*;

public abstract class Value /*Value:class*/ {

    public static final String $className = "Value";
    public static Value parse(Scan scn$, Trace trace$) {
        Token t$ = scn$.cur();
        Token.Match match$ = t$.match;
        switch(match$) {
        case VAR:
            return VARValue.parse(scn$,trace$);
        case NUM:
            return NUMValue.parse(scn$,trace$);
        default:
            throw new PLCCException(
                "Parse error",
                "Value cannot begin with " + t$.errString()
            );
        }
    }

    abstract public int eval();

//Value//
}