CSCI-258-Labs/344/arro/Java/VARValue.java

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

// <value>VARValue ::= <VAR>
public class VARValue extends Value /*VARValue:class*/ {

    public static final String $className = "VARValue";
    public static final String $ruleString =
        "<value>VARValue ::= <VAR>";

    public Token var;

    public VARValue(Token var) {
//VARValue:init//
        this.var = var;
    }

    public static VARValue parse(Scan scn$, Trace trace$) {
        if (trace$ != null)
            trace$ = trace$.nonterm("<value>VARValue", scn$.lno);
        Token var = scn$.match(Token.Match.VAR, trace$);
        return new VARValue(var);
    }

    public int eval() {
      if (!Program.hshmap.containsKey(var.toString()))
        throw new RuntimeException("Undefined variable: " + var);
      return Program.hshmap.get(var.toString());
    }

//VARValue//
}