/* TinyGrammar.java */
/* Generated By:JavaCC: Do not edit this line. TinyGrammar.java */
package grammars.j;

public class TinyGrammar implements TinyGrammarConstants {
  public static void main(String args []) throws ParseException
  {
    new TinyGrammar(System.in);
    while (true)
    {
      System.err.flush();
      System.out.println("Reading from standard input...");
      System.out.print("Enter an expression like \"1+(2+3)*4; or \".\" to quit\" :");
      try
      {
        switch (TinyGrammar.one_line())
        {
          case 0 :
          System.out.println("Evaluation Ok.");
          TinyGrammar.ReInit(System.in);
          break;
          case 1 :
          System.out.println("Goodbye.");
          System.exit(0);
          default :
          System.out.println("EOF.");
          System.exit(1);
        }
      }
      catch (Exception e)
      {
        System.out.flush();
        System.err.println("Evaluation NOK.");
        System.err.println(e.getMessage());
        TinyGrammar.ReInit(System.in);
      }
      catch (Error e)
      {
        System.out.flush();
        System.err.println("Oops.");
        System.err.println(e.getMessage());
        System.exit(-1);
      }
    }
  }

  static final public int one_line() throws ParseException {char b, e;
    switch ((jj_ntk==-1)?jj_ntk_f():jj_ntk) {
    case MINUS:
    case CONSTANT:
    case 13:{
      sum();
      jj_consume_token(11);
b = '\b';
    // Current JavaCC versions do not handle correctly Unicode characters in constants.
    // Try uncommenting e = 'Ã©' for example. Current acccepted syntax is through the Unicode escape e = '©'
    // Comment it back for the build to continue, otherwise it will fail.
    // Once a new JavaCC version is OK, leave it uncommented.
    // JavaCC 7.0 : org.javacc.parser.ParseException: Encountered " <ACT_TOK> "\' "" at line xx, column 9.
    // JavaCC 5.0 : Exception in thread "main" org.javacc.parser.TokenMgrError: Lexical error at line xx, column 11.  Encountered: "Â©" (169), after : "\'Ãƒ"
//    e = 'Ã©';
    e = '\u00a9';
    {if ("" != null) return 0;}
      break;
      }
    case 12:{
      jj_consume_token(12);
{if ("" != null) return 1;}
      break;
      }
    case 0:{
      jj_consume_token(0);
{if ("" != null) return - 1;}
      break;
      }
    default:
      jj_la1[0] = jj_gen;
      jj_consume_token(-1);
      throw new ParseException();
    }
    throw new Error("Missing return statement in function");
}

  static final public void sum() throws ParseException {
    term();
    label_1:
    while (true) {
      switch ((jj_ntk==-1)?jj_ntk_f():jj_ntk) {
      case PLUS:
      case MINUS:{
        ;
        break;
        }
      default:
        jj_la1[1] = jj_gen;
        break label_1;
      }
      switch ((jj_ntk==-1)?jj_ntk_f():jj_ntk) {
      case PLUS:{
        jj_consume_token(PLUS);
        break;
        }
      case MINUS:{
        jj_consume_token(MINUS);
        break;
        }
      default:
        jj_la1[2] = jj_gen;
        jj_consume_token(-1);
        throw new ParseException();
      }
      term();
    }
}

  static final public void term() throws ParseException {
    unary();
    label_2:
    while (true) {
      switch ((jj_ntk==-1)?jj_ntk_f():jj_ntk) {
      case MULTIPLY:
      case DIVIDE:{
        ;
        break;
        }
      default:
        jj_la1[3] = jj_gen;
        break label_2;
      }
      switch ((jj_ntk==-1)?jj_ntk_f():jj_ntk) {
      case MULTIPLY:{
        jj_consume_token(MULTIPLY);
        break;
        }
      case DIVIDE:{
        jj_consume_token(DIVIDE);
        break;
        }
      default:
        jj_la1[4] = jj_gen;
        jj_consume_token(-1);
        throw new ParseException();
      }
      unary();
    }
}

  static final public void unary() throws ParseException {
    switch ((jj_ntk==-1)?jj_ntk_f():jj_ntk) {
    case MINUS:{
      jj_consume_token(MINUS);
      element();
      break;
      }
    case CONSTANT:
    case 13:{
      element();
      break;
      }
    default:
      jj_la1[5] = jj_gen;
      jj_consume_token(-1);
      throw new ParseException();
    }
}

  static final public void element() throws ParseException {
    switch ((jj_ntk==-1)?jj_ntk_f():jj_ntk) {
    case CONSTANT:{
      jj_consume_token(CONSTANT);
      break;
      }
    case 13:{
      jj_consume_token(13);
      sum();
      jj_consume_token(14);
      break;
      }
    default:
      jj_la1[6] = jj_gen;
      jj_consume_token(-1);
      throw new ParseException();
    }
}

  static private boolean jj_initialized_once = false;
  /** Generated Token Manager. */
  static public TinyGrammarTokenManager token_source;
  static SimpleCharStream jj_input_stream;
  /** Current token. */
  static public Token token;
  /** Next token. */
  static public Token jj_nt;
  static private int jj_ntk;
  static private int jj_gen;
  static final private int[] jj_la1 = new int[7];
  static private int[] jj_la1_0;
  static {
	   jj_la1_init_0();
	}
	private static void jj_la1_init_0() {
	   jj_la1_0 = new int[] {0x3241,0x60,0x60,0x180,0x180,0x2240,0x2200,};
	}

  /** Constructor with InputStream. */
  public TinyGrammar(java.io.InputStream stream) {
	  this(stream, null);
  }
  /** Constructor with InputStream and supplied encoding */
  public TinyGrammar(java.io.InputStream stream, String encoding) {
	 if (jj_initialized_once) {
	   System.out.println("ERROR: Second call to constructor of static parser.  ");
	   System.out.println("	   You must either use ReInit() or set the JavaCC option STATIC to false");
	   System.out.println("	   during parser generation.");
	   throw new Error();
	 }
	 jj_initialized_once = true;
	 try { jj_input_stream = new SimpleCharStream(stream, encoding, 1, 1); } catch(java.io.UnsupportedEncodingException e) { throw new RuntimeException(e); }
	 token_source = new TinyGrammarTokenManager(jj_input_stream);
	 token = new Token();
	 jj_ntk = -1;
	 jj_gen = 0;
	 for (int i = 0; i < 7; i++) jj_la1[i] = -1;
  }

  /** Reinitialise. */
  static public void ReInit(java.io.InputStream stream) {
	  ReInit(stream, null);
  }
  /** Reinitialise. */
  static public void ReInit(java.io.InputStream stream, String encoding) {
	 try { jj_input_stream.ReInit(stream, encoding, 1, 1); } catch(java.io.UnsupportedEncodingException e) { throw new RuntimeException(e); }
	 token_source.ReInit(jj_input_stream);
	 token = new Token();
	 jj_ntk = -1;
	 jj_gen = 0;
	 for (int i = 0; i < 7; i++) jj_la1[i] = -1;
  }

  /** Constructor. */
  public TinyGrammar(java.io.Reader stream) {
	 if (jj_initialized_once) {
	   System.out.println("ERROR: Second call to constructor of static parser. ");
	   System.out.println("	   You must either use ReInit() or set the JavaCC option STATIC to false");
	   System.out.println("	   during parser generation.");
	   throw new Error();
	 }
	 jj_initialized_once = true;
	 jj_input_stream = new SimpleCharStream(stream, 1, 1);
	 token_source = new TinyGrammarTokenManager(jj_input_stream);
	 token = new Token();
	 jj_ntk = -1;
	 jj_gen = 0;
	 for (int i = 0; i < 7; i++) jj_la1[i] = -1;
  }

  /** Reinitialise. */
  static public void ReInit(java.io.Reader stream) {
	if (jj_input_stream == null) {
	   jj_input_stream = new SimpleCharStream(stream, 1, 1);
	} else {
	   jj_input_stream.ReInit(stream, 1, 1);
	}
	if (token_source == null) {
 token_source = new TinyGrammarTokenManager(jj_input_stream);
	}

	 token_source.ReInit(jj_input_stream);
	 token = new Token();
	 jj_ntk = -1;
	 jj_gen = 0;
	 for (int i = 0; i < 7; i++) jj_la1[i] = -1;
  }

  /** Constructor with generated Token Manager. */
  public TinyGrammar(TinyGrammarTokenManager tm) {
	 if (jj_initialized_once) {
	   System.out.println("ERROR: Second call to constructor of static parser. ");
	   System.out.println("	   You must either use ReInit() or set the JavaCC option STATIC to false");
	   System.out.println("	   during parser generation.");
	   throw new Error();
	 }
	 jj_initialized_once = true;
	 token_source = tm;
	 token = new Token();
	 jj_ntk = -1;
	 jj_gen = 0;
	 for (int i = 0; i < 7; i++) jj_la1[i] = -1;
  }

  /** Reinitialise. */
  public void ReInit(TinyGrammarTokenManager tm) {
	 token_source = tm;
	 token = new Token();
	 jj_ntk = -1;
	 jj_gen = 0;
	 for (int i = 0; i < 7; i++) jj_la1[i] = -1;
  }

  static private Token jj_consume_token(int kind) throws ParseException {
	 Token oldToken;
	 if ((oldToken = token).next != null) token = token.next;
	 else token = token.next = token_source.getNextToken();
	 jj_ntk = -1;
	 if (token.kind == kind) {
	   jj_gen++;
	   return token;
	 }
	 token = oldToken;
	 jj_kind = kind;
	 throw generateParseException();
  }


/** Get the next Token. */
  static final public Token getNextToken() {
	 if (token.next != null) token = token.next;
	 else token = token.next = token_source.getNextToken();
	 jj_ntk = -1;
	 jj_gen++;
	 return token;
  }

/** Get the specific Token. */
  static final public Token getToken(int index) {
	 Token t = token;
	 for (int i = 0; i < index; i++) {
	   if (t.next != null) t = t.next;
	   else t = t.next = token_source.getNextToken();
	 }
	 return t;
  }

  static private int jj_ntk_f() {
	 if ((jj_nt=token.next) == null)
	   return (jj_ntk = (token.next=token_source.getNextToken()).kind);
	 else
	   return (jj_ntk = jj_nt.kind);
  }

  static private java.util.List<int[]> jj_expentries = new java.util.ArrayList<int[]>();
  static private int[] jj_expentry;
  static private int jj_kind = -1;

  /** Generate ParseException. */
  static public ParseException generateParseException() {
	 jj_expentries.clear();
	 boolean[] la1tokens = new boolean[15];
	 if (jj_kind >= 0) {
	   la1tokens[jj_kind] = true;
	   jj_kind = -1;
	 }
	 for (int i = 0; i < 7; i++) {
	   if (jj_la1[i] == jj_gen) {
		 for (int j = 0; j < 32; j++) {
		   if ((jj_la1_0[i] & (1<<j)) != 0) {
			 la1tokens[j] = true;
		   }
		 }
	   }
	 }
	 for (int i = 0; i < 15; i++) {
	   if (la1tokens[i]) {
		 jj_expentry = new int[1];
		 jj_expentry[0] = i;
		 jj_expentries.add(jj_expentry);
	   }
	 }
	 int[][] exptokseq = new int[jj_expentries.size()][];
	 for (int i = 0; i < jj_expentries.size(); i++) {
	   exptokseq[i] = jj_expentries.get(i);
	 }
	 return new ParseException(token, exptokseq, tokenImage);
  }

  static private boolean trace_enabled;

/** Trace enabled. */
  static final public boolean trace_enabled() {
	 return trace_enabled;
  }

  /** Enable tracing. */
  static final public void enable_tracing() {
  }

  /** Disable tracing. */
  static final public void disable_tracing() {
  }

}
