/* Generated By:JavaCC: Do not edit this line. eg1.java */
package org.simtk.parser;

@SuppressWarnings("all")
public class eg1 implements eg1Constants {
  public static void main(String args[]) throws ParseException {
    eg1 parser = new eg1(System.in);
    while (true) {
      System.out.println("Reading from standard input...");
      System.out.print("Enter an expression like \"1+(2+3)*4;\" :");
      try {
        switch (eg1.one_line()) {
        case 0:
          System.out.println("OK.");
          break;
        case 1:
          System.out.println("Goodbye.");
          break;
        default:
          break;
        }
      } catch (Exception e) {
        System.out.println("NOK.");
        System.out.println(e.getMessage());
        eg1.ReInit(System.in);
      } catch (Error e) {
        System.out.println("Oops.");
        System.out.println(e.getMessage());
        break;
      }
    }
  }

  static final public int one_line() throws ParseException {
    switch ((jj_ntk==-1)?jj_ntk():jj_ntk) {
    case MINUS:
    case CONSTANT:
    case 12:
      sum();
      jj_consume_token(11);
              {if (true) return 0;}
      break;
    case 11:
      jj_consume_token(11);
              {if (true) 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():jj_ntk) {
      case PLUS:
      case MINUS:
        ;
        break;
      default:
        jj_la1[1] = jj_gen;
        break label_1;
      }
      switch ((jj_ntk==-1)?jj_ntk():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():jj_ntk) {
      case MULTIPLY:
      case DIVIDE:
        ;
        break;
      default:
        jj_la1[3] = jj_gen;
        break label_2;
      }
      switch ((jj_ntk==-1)?jj_ntk():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():jj_ntk) {
    case MINUS:
      jj_consume_token(MINUS);
      element();
      break;
    case CONSTANT:
    case 12:
      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():jj_ntk) {
    case CONSTANT:
      jj_consume_token(CONSTANT);
      break;
    case 12:
      jj_consume_token(12);
      sum();
      jj_consume_token(13);
      break;
    default:
      jj_la1[6] = jj_gen;
      jj_consume_token(-1);
      throw new ParseException();
    }
  }

  static private boolean jj_initialized_once = false;
  static public eg1TokenManager token_source;
  static SimpleCharStream jj_input_stream;
  static public Token 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_0();
   }
   private static void jj_la1_0() {
      jj_la1_0 = new int[] {0x1a40,0x60,0x60,0x180,0x180,0x1240,0x1200,};
   }

  public eg1(java.io.InputStream stream) {
     this(stream, null);
  }
  public eg1(java.io.InputStream stream, String encoding) {
    if (jj_initialized_once) {
      System.out.println("ERROR: Second call to constructor of static parser.  You must");
      System.out.println("       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 eg1TokenManager(jj_input_stream);
    token = new Token();
    jj_ntk = -1;
    jj_gen = 0;
    for (int i = 0; i < 7; i++) jj_la1[i] = -1;
  }

  static public void ReInit(java.io.InputStream stream) {
     ReInit(stream, null);
  }
  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;
  }

  public eg1(java.io.Reader stream) {
    if (jj_initialized_once) {
      System.out.println("ERROR: Second call to constructor of static parser.  You must");
      System.out.println("       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 eg1TokenManager(jj_input_stream);
    token = new Token();
    jj_ntk = -1;
    jj_gen = 0;
    for (int i = 0; i < 7; i++) jj_la1[i] = -1;
  }

  static public void ReInit(java.io.Reader stream) {
    jj_input_stream.ReInit(stream, 1, 1);
    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;
  }

  public eg1(eg1TokenManager tm) {
    if (jj_initialized_once) {
      System.out.println("ERROR: Second call to constructor of static parser.  You must");
      System.out.println("       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;
  }

  public void ReInit(eg1TokenManager 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 final 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();
  }

  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;
  }

  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 final private int jj_ntk() {
    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.Vector<int[]> jj_expentries = new java.util.Vector<int[]>();
  static private int[] jj_expentry;
  static private int jj_kind = -1;

  static public ParseException generateParseException() {
    jj_expentries.removeAllElements();
    boolean[] la1tokens = new boolean[14];
    for (int i = 0; i < 14; i++) {
      la1tokens[i] = false;
    }
    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 < 14; i++) {
      if (la1tokens[i]) {
        jj_expentry = new int[1];
        jj_expentry[0] = i;
        jj_expentries.addElement(jj_expentry);
      }
    }
    int[][] exptokseq = new int[jj_expentries.size()][];
    for (int i = 0; i < jj_expentries.size(); i++) {
      exptokseq[i] = (int[])jj_expentries.elementAt(i);
    }
    return new ParseException(token, exptokseq, tokenImage);
  }

  static final public void enable_tracing() {
  }

  static final public void disable_tracing() {
  }

}