Symbol.java

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package aud.example.expr;
 
public class Symbol extends Terminal {
 
  String name_ = null;
 
  public Symbol(String name) { name_=name; }
 
  public String getName() { return name_; }
 
  @Override public double getValue() {
    throw new UnsupportedOperationException
      ("don't know value of '"+name_+"'");
  }
  @Override public Type getType() { return Type.TSymbol; }
  @Override public Symbol clone() { return new Symbol(name_); }
  @Override public String toString() { return name_; }
}