package Frame;import Temp.*;import java.util.Hashtable;public abstract class Frame {   abstract public Frame newFrame(Label name, Util.BoolList formals);   public Label name;   public AccessList formals;   public Hashtable funz_ext;   // frame pointer (registro che punta al frame pointer)   abstract public Temp FP();   // return value  (registro per il valore restituito)   abstract public Temp RV();   abstract public int wordSize();   abstract public Tree.Stm procEntryExit1(Tree.Stm body);   abstract public String string(Label label , String value);   abstract public Tree.Exp externalCall(String func, Tree.ExpList args);   abstract public Access allocLocal(boolean escape);   // per la gestione delle funzioni di libreria   abstract public void put_lib_f(String stringa,Label label);}