grm.java

tiger编译器的Java实现

    "\000\002\001\001\000\006\004\177\022\017\001\001\000" +
    "\002\001\001\000\004\020\201\001\001\000\002\001\001" +
    "\000\002\001\001\000\006\004\204\022\017\001\001\000" +
    "\002\001\001\000\006\004\206\022\017\001\001\000\002" +
    "\001\001\000\002\001\001\000\002\001\001\000\006\004" +
    "\212\022\017\001\001\000\002\001\001\000\006\004\214" +
    "\022\017\001\001\000\002\001\001\000\006\004\216\022" +
    "\017\001\001\000\002\001\001\000\002\001\001\000\006" +
    "\004\221\022\017\001\001\000\002\001\001\000\002\001" +
    "\001" });

  /** Access to <code>reduce_goto</code> table. */
  public short[][] reduce_table() {return _reduce_table;}

  /** Instance of action encapsulation class. */
  protected CUP$Grm$actions action_obj;

  /** Action encapsulation object initializer. */
  protected void init_actions()
    {
      action_obj = new CUP$Grm$actions(this);
    }

  /** Invoke a user supplied parse action. */
  public java_cup.runtime.Symbol do_action(
    int                        act_num,
    java_cup.runtime.lr_parser parser,
    java.util.Stack            stack,
    int                        top)
    throws java.lang.Exception
  {
    /* call code in generated class */
    return action_obj.CUP$Grm$do_action(act_num, parser, stack, top);
  }

  /** Indicates start state. */
  public int start_state() {return 0;}
  /** Indicates start production. */
  public int start_production() {return 0;}

  /** <code>EOF</code> Symbol index. */
  public int EOF_sym() {return 0;}

  /** <code>error</code> Symbol index. */
  public int error_sym() {return 1;}


  /** Scan to get the next Symbol. */
  public java_cup.runtime.Symbol scan()
    throws java.lang.Exception
    {
 java_cup.runtime.Symbol symb= lexer.nextToken(); for(;(symb.sym==sym.error||symb.sym==sym.COMM)&&symb.sym!=sym.EOF;) symb= lexer.nextToken(); return symb; 
    }

 
  public Exp parseResult;
  Lexer lexer;

  public void syntax_error(java_cup.runtime.Symbol current) {
   report_error("Syntax error (" + current.sym + ")", current);
  }

  ErrorMsg.ErrorMsg errorMsg;

  public void report_error(String message, 
			   java_cup.runtime.Symbol info) {
      errorMsg.error(info.left, message);
  }

    public Grm(Lexer l, ErrorMsg.ErrorMsg err) {
    this();
    errorMsg=err;
    lexer=l;
  }

}

/** Cup generated class to encapsulate user supplied action code.*/
class CUP$Grm$actions {

 static Symbol.Symbol sym(String s) {
	         return Symbol.Symbol.symbol(s);
	        }
	    
  private final Grm parser;

  /** Constructor */
  CUP$Grm$actions(Grm parser) {
    this.parser = parser;
  }

  /** Method with the actual generated action code. */
  public final java_cup.runtime.Symbol CUP$Grm$do_action(
    int                        CUP$Grm$act_num,
    java_cup.runtime.lr_parser CUP$Grm$parser,
    java.util.Stack            CUP$Grm$stack,
    int                        CUP$Grm$top)
    throws java.lang.Exception
    {
      /* Symbol object for return from actions */
      java_cup.runtime.Symbol CUP$Grm$result;

      /* select the action based on the action number */
      switch (CUP$Grm$act_num)
        {
          /*. . . . . . . . . . . . . . . . . . . .*/
          case 64: // lvalue ::= lvalue LBRACK expression RBRACK 
            {
              VarExp RESULT = null;
		int lleft = ((java_cup.runtime.Symbol)CUP$Grm$stack.elementAt(CUP$Grm$top-3)).left;
		int lright = ((java_cup.runtime.Symbol)CUP$Grm$stack.elementAt(CUP$Grm$top-3)).right;
		VarExp l = (VarExp)((java_cup.runtime.Symbol) CUP$Grm$stack.elementAt(CUP$Grm$top-3)).value;
		int eleft = ((java_cup.runtime.Symbol)CUP$Grm$stack.elementAt(CUP$Grm$top-1)).left;
		int eright = ((java_cup.runtime.Symbol)CUP$Grm$stack.elementAt(CUP$Grm$top-1)).right;
		Exp e = (Exp)((java_cup.runtime.Symbol) CUP$Grm$stack.elementAt(CUP$Grm$top-1)).value;
		 RESULT=  new VarExp(lleft,new SubscriptVar(lleft,l.var,e)); 
              CUP$Grm$result = new java_cup.runtime.Symbol(16/*lvalue*/, ((java_cup.runtime.Symbol)CUP$Grm$stack.elementAt(CUP$Grm$top-3)).left, ((java_cup.runtime.Symbol)CUP$Grm$stack.elementAt(CUP$Grm$top-0)).right, RESULT);
            }
          return CUP$Grm$result;

          /*. . . . . . . . . . . . . . . . . . . .*/
          case 63: // lvalue ::= lvalue DOT ID 
            {
              VarExp RESULT = null;
		int lleft = ((java_cup.runtime.Symbol)CUP$Grm$stack.elementAt(CUP$Grm$top-2)).left;
		int lright = ((java_cup.runtime.Symbol)CUP$Grm$stack.elementAt(CUP$Grm$top-2)).right;
		VarExp l = (VarExp)((java_cup.runtime.Symbol) CUP$Grm$stack.elementAt(CUP$Grm$top-2)).value;
		int ileft = ((java_cup.runtime.Symbol)CUP$Grm$stack.elementAt(CUP$Grm$top-0)).left;
		int iright = ((java_cup.runtime.Symbol)CUP$Grm$stack.elementAt(CUP$Grm$top-0)).right;
		String i = (String)((java_cup.runtime.Symbol) CUP$Grm$stack.elementAt(CUP$Grm$top-0)).value;
		 RESULT= new VarExp(lleft,new FieldVar(ileft,l.var,sym(i))); 
              CUP$Grm$result = new java_cup.runtime.Symbol(16/*lvalue*/, ((java_cup.runtime.Symbol)CUP$Grm$stack.elementAt(CUP$Grm$top-2)).left, ((java_cup.runtime.Symbol)CUP$Grm$stack.elementAt(CUP$Grm$top-0)).right, RESULT);
            }
          return CUP$Grm$result;

          /*. . . . . . . . . . . . . . . . . . . .*/
          case 62: // lvalue ::= ID LBRACK expression RBRACK 
            {
              VarExp RESULT = null;
		int ileft = ((java_cup.runtime.Symbol)CUP$Grm$stack.elementAt(CUP$Grm$top-3)).left;
		int iright = ((java_cup.runtime.Symbol)CUP$Grm$stack.elementAt(CUP$Grm$top-3)).right;
		String i = (String)((java_cup.runtime.Symbol) CUP$Grm$stack.elementAt(CUP$Grm$top-3)).value;
		int eleft = ((java_cup.runtime.Symbol)CUP$Grm$stack.elementAt(CUP$Grm$top-1)).left;
		int eright = ((java_cup.runtime.Symbol)CUP$Grm$stack.elementAt(CUP$Grm$top-1)).right;
		Exp e = (Exp)((java_cup.runtime.Symbol) CUP$Grm$stack.elementAt(CUP$Grm$top-1)).value;
		 RESULT=  new VarExp(ileft,new SubscriptVar(ileft,
	           new SimpleVar(ileft,sym(i)),e)); 
              CUP$Grm$result = new java_cup.runtime.Symbol(16/*lvalue*/, ((java_cup.runtime.Symbol)CUP$Grm$stack.elementAt(CUP$Grm$top-3)).left, ((java_cup.runtime.Symbol)CUP$Grm$stack.elementAt(CUP$Grm$top-0)).right, RESULT);
            }
          return CUP$Grm$result;

          /*. . . . . . . . . . . . . . . . . . . .*/
          case 61: // lvalue ::= ID 
            {
              VarExp RESULT = null;
		int ileft = ((java_cup.runtime.Symbol)CUP$Grm$stack.elementAt(CUP$Grm$top-0)).left;
		int iright = ((java_cup.runtime.Symbol)CUP$Grm$stack.elementAt(CUP$Grm$top-0)).right;
		String i = (String)((java_cup.runtime.Symbol) CUP$Grm$stack.elementAt(CUP$Grm$top-0)).value;
		 RESULT=new VarExp(ileft,new SimpleVar(ileft,sym(i))); 
              CUP$Grm$result = new java_cup.runtime.Symbol(16/*lvalue*/, ((java_cup.runtime.Symbol)CUP$Grm$stack.elementAt(CUP$Grm$top-0)).left, ((java_cup.runtime.Symbol)CUP$Grm$stack.elementAt(CUP$Grm$top-0)).right, RESULT);
            }
          return CUP$Grm$result;

          /*. . . . . . . . . . . . . . . . . . . .*/
          case 60: // field_list ::= ID EQ expression COMMA field_list 
            {
              FieldExpList RESULT = null;
		int ileft = ((java_cup.runtime.Symbol)CUP$Grm$stack.elementAt(CUP$Grm$top-4)).left;
		int iright = ((java_cup.runtime.Symbol)CUP$Grm$stack.elementAt(CUP$Grm$top-4)).right;
		String i = (String)((java_cup.runtime.Symbol) CUP$Grm$stack.elementAt(CUP$Grm$top-4)).value;
		int eleft = ((java_cup.runtime.Symbol)CUP$Grm$stack.elementAt(CUP$Grm$top-2)).left;
		int eright = ((java_cup.runtime.Symbol)CUP$Grm$stack.elementAt(CUP$Grm$top-2)).right;
		Exp e = (Exp)((java_cup.runtime.Symbol) CUP$Grm$stack.elementAt(CUP$Grm$top-2)).value;
		int lleft = ((java_cup.runtime.Symbol)CUP$Grm$stack.elementAt(CUP$Grm$top-0)).left;
		int lright = ((java_cup.runtime.Symbol)CUP$Grm$stack.elementAt(CUP$Grm$top-0)).right;
		FieldExpList l = (FieldExpList)((java_cup.runtime.Symbol) CUP$Grm$stack.elementAt(CUP$Grm$top-0)).value;
		 RESULT=new FieldExpList(lleft,sym(i),e,l); 
              CUP$Grm$result = new java_cup.runtime.Symbol(14/*field_list*/, ((java_cup.runtime.Symbol)CUP$Grm$stack.elementAt(CUP$Grm$top-4)).left, ((java_cup.runtime.Symbol)CUP$Grm$stack.elementAt(CUP$Grm$top-0)).right, RESULT);
            }
          return CUP$Grm$result;

          /*. . . . . . . . . . . . . . . . . . . .*/
          case 59: // field_list ::= ID EQ expression 
            {
              FieldExpList RESULT = null;
		int ileft = ((java_cup.runtime.Symbol)CUP$Grm$stack.elementAt(CUP$Grm$top-2)).left;
		int iright = ((java_cup.runtime.Symbol)CUP$Grm$stack.elementAt(CUP$Grm$top-2)).right;
		String i = (String)((java_cup.runtime.Symbol) CUP$Grm$stack.elementAt(CUP$Grm$top-2)).value;
		int eleft = ((java_cup.runtime.Symbol)CUP$Grm$stack.elementAt(CUP$Grm$top-0)).left;
		int eright = ((java_cup.runtime.Symbol)CUP$Grm$stack.elementAt(CUP$Grm$top-0)).right;
		Exp e = (Exp)((java_cup.runtime.Symbol) CUP$Grm$stack.elementAt(CUP$Grm$top-0)).value;
		 RESULT=new FieldExpList(ileft,sym(i),e,null); 
              CUP$Grm$result = new java_cup.runtime.Symbol(14/*field_list*/, ((java_cup.runtime.Symbol)CUP$Grm$stack.elementAt(CUP$Grm$top-2)).left, ((java_cup.runtime.Symbol)CUP$Grm$stack.elementAt(CUP$Grm$top-0)).right, RESULT);
            }
          return CUP$Grm$result;

          /*. . . . . . . . . . . . . . . . . . . .*/
          case 58: // expr_list ::= expression COMMA expr_list 
            {
              ExpList RESULT = null;
		int eleft = ((java_cup.runtime.Symbol)CUP$Grm$stack.elementAt(CUP$Grm$top-2)).left;
		int eright = ((java_cup.runtime.Symbol)CUP$Grm$stack.elementAt(CUP$Grm$top-2)).right;
		Exp e = (Exp)((java_cup.runtime.Symbol) CUP$Grm$stack.elementAt(CUP$Grm$top-2)).value;
		int lleft = ((java_cup.runtime.Symbol)CUP$Grm$stack.elementAt(CUP$Grm$top-0)).left;
		int lright = ((java_cup.runtime.Symbol)CUP$Grm$stack.elementAt(CUP$Grm$top-0)).right;
		ExpList l = (ExpList)((java_cup.runtime.Symbol) CUP$Grm$stack.elementAt(CUP$Grm$top-0)).value;
		RESULT=new ExpList(e,l);
              CUP$Grm$result = new java_cup.runtime.Symbol(13/*expr_list*/, ((java_cup.runtime.Symbol)CUP$Grm$stack.elementAt(CUP$Grm$top-2)).left, ((java_cup.runtime.Symbol)CUP$Grm$stack.elementAt(CUP$Grm$top-0)).right, RESULT);
            }
          return CUP$Grm$result;