package Parse;

public class Parse {

  public ErrorMsg.ErrorMsg errorMsg;
  public Absyn.Exp tree;
  public Absyn.Print printer;    // pretty printer

  public Parse(String filename) {
      errorMsg = new ErrorMsg.ErrorMsg(filename);

      printer = new Absyn.Print(System.out);

      {java.io.InputStream inp;
       try {inp=new java.io.FileInputStream(filename);
       } catch (java.io.FileNotFoundException e) {
	 throw new Error("File not found: " + filename);
       }
       parser theparser = new parser(new Yylex(inp,errorMsg), errorMsg);
     //  open input files, etc. here 

      try {
          tree = (Absyn.Exp) (theparser.parse().value);  // get tree
      } catch (Throwable e) {
	e.printStackTrace();
	throw new Error(e.toString());
      } 
      finally {
         try {inp.close();} catch (java.io.IOException e) {}
      }
//      tree=theparser.parseResult;

      printer.prExp(tree,0);   // pretty print tree

     } 
}// end of Parse constructor   


  public static void main(String argv[])  
  {

       String filename = argv[0];
       new Parse(filename);

      System.out.println("\nNice tree, no?");


  } // end of main


}