exprparser.java

SkipOOMiniJOOL教学语言的编译器前端

			file = argv[0];
		boolean viewAST = true;
		ASTNode block;
		block = ExprParser.parse(file);
		if (viewAST) {
			ASTViewer viewer = new ASTViewer();
			viewer.viewAST(block);
		}
		//added by me
		//ASTNode c=p.parse(args[0]);//return the root of an ast tree
/*
		PrintStream outfile = null;
		try {
			outfile = new PrintStream(new FileOutputStream(file+".s"));
		} catch(IOException e) {
			System.out.println(e);
			System.exit(1);
		}
		try{	
			CodeGenerator CGen=new CodeGenerator(outfile);
		(block).accept(CGen);//accept
		
		CGen.emitCode();//emit code 
		System.out.println("Code successfully generated");
		}
		catch(Exception e) {
			System.out.println("There may be some semantic errors  in the foreend");
			//System.exit(1);
		}
		
		*/		
	/*	CodeGenerator CGen=new CodeGenerator(outfile);
		(block).accept(CGen);//accept
		
		CGen.emitCode();//emit code 
		System.out.println("Code successfully generated");*/
	}
	
	public void report_fatal_error(String s,Object o)
	{
		System.out.println("fatal error ,I don't know handle this problem ,sorry ...");
	}
	public void report_error(String s,Object o){
		System.out.println("error ,I don't know handle this problem ,sorry ...");
	}
	public void syntax_error(Symbol s){
		System.out.println("Syntax error ,I don't know handle this problem ,sorry ...");
	}
	public void unrecovered_syntax_error(Symbol s){
		System.out.println("unrecovered syntax error ,I don't know handle this problem ,sorry ...");
	}
	
	

}

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


	private boolean success = true;
	
	private AST ast = AST.newAST(AST.JLS3);
	private CompilationUnit root = null;
	
	public ASTNode getAST() {
		if (success) {
			System.out.println("陶涛 pb03011062");
			return root;
		}
		return null;
	}
	

  private final ExprParser parser;

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

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

      /* select the action based on the action number */
      switch (CUP$ExprParser$act_num)
        {
          /*. . . . . . . . . . . . . . . . . . . .*/
          case 130: // primitive_type ::= VOID 
            {
              PrimitiveType RESULT = null;
		
		RESULT =ast.newPrimitiveType(PrimitiveType.VOID);
	
              CUP$ExprParser$result = new java_cup.runtime.Symbol(56/*primitive_type*/, ((java_cup.runtime.Symbol)CUP$ExprParser$stack.elementAt(CUP$ExprParser$top-0)).left, ((java_cup.runtime.Symbol)CUP$ExprParser$stack.elementAt(CUP$ExprParser$top-0)).right, RESULT);
            }
          return CUP$ExprParser$result;

          /*. . . . . . . . . . . . . . . . . . . .*/
          case 129: // primitive_type ::= BOOLEAN 
            {
              PrimitiveType RESULT = null;
		
		RESULT = ast.newPrimitiveType(PrimitiveType.BOOLEAN);
	
              CUP$ExprParser$result = new java_cup.runtime.Symbol(56/*primitive_type*/, ((java_cup.runtime.Symbol)CUP$ExprParser$stack.elementAt(CUP$ExprParser$top-0)).left, ((java_cup.runtime.Symbol)CUP$ExprParser$stack.elementAt(CUP$ExprParser$top-0)).right, RESULT);
            }
          return CUP$ExprParser$result;

          /*. . . . . . . . . . . . . . . . . . . .*/
          case 128: // primitive_type ::= INT 
            {
              PrimitiveType RESULT = null;
		
		RESULT = ast.newPrimitiveType(PrimitiveType.INT);
	
              CUP$ExprParser$result = new java_cup.runtime.Symbol(56/*primitive_type*/, ((java_cup.runtime.Symbol)CUP$ExprParser$stack.elementAt(CUP$ExprParser$top-0)).left, ((java_cup.runtime.Symbol)CUP$ExprParser$stack.elementAt(CUP$ExprParser$top-0)).right, RESULT);
            }
          return CUP$ExprParser$result;

          /*. . . . . . . . . . . . . . . . . . . .*/
          case 127: // type ::= INT LBRACK INTEGER_LITERAL RBRACK 
            {
              Type RESULT = null;
		int illeft = ((java_cup.runtime.Symbol)CUP$ExprParser$stack.elementAt(CUP$ExprParser$top-1)).left;
		int ilright = ((java_cup.runtime.Symbol)CUP$ExprParser$stack.elementAt(CUP$ExprParser$top-1)).right;
		Integer il = (Integer)((java_cup.runtime.Symbol) CUP$ExprParser$stack.elementAt(CUP$ExprParser$top-1)).value;
		
		 ArrayType aa= ast.newArrayType(ast.newPrimitiveType(PrimitiveType.INT));
		 aa.setProperty("ArrayLength",il);
		 RESULT = aa;
	
              CUP$ExprParser$result = new java_cup.runtime.Symbol(55/*type*/, ((java_cup.runtime.Symbol)CUP$ExprParser$stack.elementAt(CUP$ExprParser$top-3)).left, ((java_cup.runtime.Symbol)CUP$ExprParser$stack.elementAt(CUP$ExprParser$top-0)).right, RESULT);
            }
          return CUP$ExprParser$result;

          /*. . . . . . . . . . . . . . . . . . . .*/
          case 126: // type ::= STRING 
            {
              Type RESULT = null;
		
		RESULT = ast.newSimpleType(ast.newSimpleName("String"));
	
              CUP$ExprParser$result = new java_cup.runtime.Symbol(55/*type*/, ((java_cup.runtime.Symbol)CUP$ExprParser$stack.elementAt(CUP$ExprParser$top-0)).left, ((java_cup.runtime.Symbol)CUP$ExprParser$stack.elementAt(CUP$ExprParser$top-0)).right, RESULT);
            }
          return CUP$ExprParser$result;

          /*. . . . . . . . . . . . . . . . . . . .*/
          case 125: // type ::= primitive_type 
            {
              Type RESULT = null;
		int ptleft = ((java_cup.runtime.Symbol)CUP$ExprParser$stack.elementAt(CUP$ExprParser$top-0)).left;
		int ptright = ((java_cup.runtime.Symbol)CUP$ExprParser$stack.elementAt(CUP$ExprParser$top-0)).right;
		PrimitiveType pt = (PrimitiveType)((java_cup.runtime.Symbol) CUP$ExprParser$stack.elementAt(CUP$ExprParser$top-0)).value;
		
		RESULT = pt;
	
              CUP$ExprParser$result = new java_cup.runtime.Symbol(55/*type*/, ((java_cup.runtime.Symbol)CUP$ExprParser$stack.elementAt(CUP$ExprParser$top-0)).left, ((java_cup.runtime.Symbol)CUP$ExprParser$stack.elementAt(CUP$ExprParser$top-0)).right, RESULT);
            }
          return CUP$ExprParser$result;

          /*. . . . . . . . . . . . . . . . . . . .*/
          case 124: // argument_list ::= argument_list COMMA expression 
            {
              List RESULT = null;
		int myalleft = ((java_cup.runtime.Symbol)CUP$ExprParser$stack.elementAt(CUP$ExprParser$top-2)).left;
		int myalright = ((java_cup.runtime.Symbol)CUP$ExprParser$stack.elementAt(CUP$ExprParser$top-2)).right;
		List myal = (List)((java_cup.runtime.Symbol) CUP$ExprParser$stack.elementAt(CUP$ExprParser$top-2)).value;
		int myeleft = ((java_cup.runtime.Symbol)CUP$ExprParser$stack.elementAt(CUP$ExprParser$top-0)).left;
		int myeright = ((java_cup.runtime.Symbol)CUP$ExprParser$stack.elementAt(CUP$ExprParser$top-0)).right;
		Expression mye = (Expression)((java_cup.runtime.Symbol) CUP$ExprParser$stack.elementAt(CUP$ExprParser$top-0)).value;
		
		myal.add(mye);
		RESULT = myal;
	
              CUP$ExprParser$result = new java_cup.runtime.Symbol(54/*argument_list*/, ((java_cup.runtime.Symbol)CUP$ExprParser$stack.elementAt(CUP$ExprParser$top-2)).left, ((java_cup.runtime.Symbol)CUP$ExprParser$stack.elementAt(CUP$ExprParser$top-0)).right, RESULT);
            }
          return CUP$ExprParser$result;

          /*. . . . . . . . . . . . . . . . . . . .*/
          case 123: // argument_list ::= expression 
            {
              List RESULT = null;
		int myexpleft = ((java_cup.runtime.Symbol)CUP$ExprParser$stack.elementAt(CUP$ExprParser$top-0)).left;
		int myexpright = ((java_cup.runtime.Symbol)CUP$ExprParser$stack.elementAt(CUP$ExprParser$top-0)).right;
		Expression myexp = (Expression)((java_cup.runtime.Symbol) CUP$ExprParser$stack.elementAt(CUP$ExprParser$top-0)).value;
		
		RESULT =new ArrayList();
		RESULT.add(myexp);
		
	
              CUP$ExprParser$result = new java_cup.runtime.Symbol(54/*argument_list*/, ((java_cup.runtime.Symbol)CUP$ExprParser$stack.elementAt(CUP$ExprParser$top-0)).left, ((java_cup.runtime.Symbol)CUP$ExprParser$stack.elementAt(CUP$ExprParser$top-0)).right, RESULT);
            }
          return CUP$ExprParser$result;

          /*. . . . . . . . . . . . . . . . . . . .*/
          case 122: // argument_list_opt ::= argument_list 
            {
              List RESULT = null;
		int myalleft = ((java_cup.runtime.Symbol)CUP$ExprParser$stack.elementAt(CUP$ExprParser$top-0)).left;
		int myalright = ((java_cup.runtime.Symbol)CUP$ExprParser$stack.elementAt(CUP$ExprParser$top-0)).right;
		List myal = (List)((java_cup.runtime.Symbol) CUP$ExprParser$stack.elementAt(CUP$ExprParser$top-0)).value;
		
		RESULT = myal;
	
              CUP$ExprParser$result = new java_cup.runtime.Symbol(53/*argument_list_opt*/, ((java_cup.runtime.Symbol)CUP$ExprParser$stack.elementAt(CUP$ExprParser$top-0)).left, ((java_cup.runtime.Symbol)CUP$ExprParser$stack.elementAt(CUP$ExprParser$top-0)).right, RESULT);
            }
          return CUP$ExprParser$result;

          /*. . . . . . . . . . . . . . . . . . . .*/
          case 121: // argument_list_opt ::= 
            {
              List RESULT = null;
		
		RESULT = new ArrayList();
	
              CUP$ExprParser$result = new java_cup.runtime.Symbol(53/*argument_list_opt*/, ((java_cup.runtime.Symbol)CUP$ExprParser$stack.elementAt(CUP$ExprParser$top-0)).right, ((java_cup.runtime.Symbol)CUP$ExprParser$stack.elementAt(CUP$ExprParser$top-0)).right, RESULT);
            }
          return CUP$ExprParser$result;

          /*. . . . . . . . . . . . . . . . . . . .*/
          case 120: // return_statement ::= RETURN expression_opt SEMICOLON 
            {