001/* Generated By:JavaCC: Do not edit this line. Token.java Version 7.0 */
002/* JavaCCOptions:TOKEN_EXTENDS=,KEEP_LINE_COLUMN=true,SUPPORT_CLASS_VISIBILITY_PUBLIC=true */
003package jmri.jmrix.srcp.parser;
004
005/*
006 * Describes the input token stream.
007 */
008
009public class Token implements java.io.Serializable {
010
011  /*
012   * The version identifier for this Serializable class.
013   * Increment only if the <i>serialized</i> form of the
014   * class changes.
015   */
016  private static final long serialVersionUID = 1L;
017
018  /*
019   * An integer that describes the kind of this token.  This numbering
020   * system is determined by JavaCCParser, and a table of these numbers is
021   * stored in the file ...Constants.java.
022   */
023  public int kind;
024
025  /* The line number of the first character of this Token. */
026  public int beginLine;
027  /* The column number of the first character of this Token. */
028  public int beginColumn;
029  /* The line number of the last character of this Token. */
030  public int endLine;
031  /* The column number of the last character of this Token. */
032  public int endColumn;
033
034  /*
035   * The string image of the token.
036   */
037  public String image;
038
039  /*
040   * A reference to the next regular (non-special) token from the input
041   * stream.  If this is the last token from the input stream, or if the
042   * token manager has not read tokens beyond this one, this field is
043   * set to null.  This is true only if this token is also a regular
044   * token.  Otherwise, see below for a description of the contents of
045   * this field.
046   */
047  public Token next;
048
049  /*
050   * This field is used to access special tokens that occur prior to this
051   * token, but after the immediately preceding regular (non-special) token.
052   * If there are no such special tokens, this field is set to null.
053   * When there are more than one such special token, this field refers
054   * to the last of these special tokens, which in turn refers to the next
055   * previous special token through its specialToken field, and so on
056   * until the first special token (whose specialToken field is null).
057   * The next fields of special tokens refer to other special tokens that
058   * immediately follow it (without an intervening regular token).  If there
059   * is no such token, this field is null.
060   */
061  public Token specialToken;
062
063  /*
064   * An optional attribute value of the Token.
065   * Tokens which are not used as syntactic sugar will often contain
066   * meaningful values that will be used later on by the compiler or
067   * interpreter. This attribute value is often different from the image.
068   * Any subclass of Token that actually wants to return a non-null value can
069   * override this method as appropriate.
070   */
071  public Object getValue() {
072    return null;
073  }
074
075  /*
076   * No-argument constructor
077   */
078  public Token() {}
079
080  /*
081   * Constructs a new token for the specified Image.
082   */
083  public Token(int kind)
084  {
085    this(kind, null);
086  }
087
088  /*
089   * Constructs a new token for the specified Image and Kind.
090   */
091  public Token(int kind, String image)
092  {
093    this.kind = kind;
094    this.image = image;
095  }
096
097  /*
098   * Returns the image.
099   */
100  @Override
101  public String toString()
102  {
103    return image;
104  }
105
106  /*
107   * Returns a new Token object, by default. However, if you want, you
108   * can create and return subclass objects based on the value of ofKind.
109   * Simply add the cases to the switch for all those special cases.
110   * For example, if you have a subclass of Token called IDToken that
111   * you want to create if ofKind is ID, simply add something like :
112   *
113   *    case MyParserConstants.ID : return new IDToken(ofKind, image);
114   *
115   * to the following switch statement. Then you can cast matchedToken
116   * variable to the appropriate type and use sit in your lexical actions.
117   */
118  public static Token newToken(int ofKind, String image)
119  {
120    switch(ofKind)
121    {
122      default : return new Token(ofKind, image);
123    }
124  }
125
126  public static Token newToken(int ofKind)
127  {
128    return newToken(ofKind, null);
129  }
130
131}
132/* JavaCC - OriginalChecksum=5ca78608f3b3dd49ead75046f6109d26 (do not edit this line) */