import java.util.*;

// **********************************************************************
// The Sym class defines a symbol-table entry;
// an object that contains a name (a String) and a type (a Type).
// **********************************************************************
//
// Methods
// =======
//
// constructor
// -----------
// Sym(String S)         -- constructor: creates a Sym with the given name
// Sym(String S, Type T) -- constructor: creates a Sym with the given name
//                          and the given type
//
// accessor
// --------
// name()             -- returns this symbol's name
// type()             -- returns this symbol's type
//
// other
// -----
// toString()        -- prints the values associated with this Sym

class Sym {
    public Sym(String S) {
	myName = S;
    }

    public Sym(String S, Type T) {
	myName = S;
	myType = T;
    }

    public String name() {
	return myName;
    }

    public Type type() {
	return myType;
    }

    public String toString() {
	return "";
    }

  // private fields
    private String myName;
    private Type myType;
}

// **********************************************************************
// The FnSym class is a subclass of the Sym class, just for functions.
// The myReturnType field holds the return type, and there are new fields
// to hold information about the parameters.
// **********************************************************************
class FnSym extends Sym {
    public FnSym(String S, Type T, int numparams) {
	super(S, new FnType());
	myReturnType = T;
	myNumParams = numparams;
    }

    public void addFormals(LinkedList L) {
	myParamTypes = L;
    }
    
    public Type returnType() {
	return myReturnType;
    }

    public int numparams() {
	return myNumParams;
    }

    public LinkedList paramTypes() {
	return myParamTypes;
    }

    // new fields
    private Type myReturnType;
    private int myNumParams;
    private LinkedList myParamTypes; // list of Types
}