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Java > Open Source Codes > org > javacc > parser > TokenProduction


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22
23 package org.javacc.parser;
24
25 /**
26  * Describes the various regular expression productions.
27  */
28
29 public class TokenProduction {
30
31   /**
32    * Definitions of constants that identify the kind of regular
33    * expression production this is.
34    */
35   public static final int TOKEN = 0,
36                           SKIP = 1,
37                           MORE = 2,
38                           SPECIAL = 3;
39
40   /**
41    * The image of the above constants.
42    */
43   public static final String JavaDoc[] kindImage = {
44     "TOKEN", "SKIP", "MORE", "SPECIAL"
45   };
46
47   /**
48    * The starting line and column of this token production.
49    */
50   public int line, column;
51
52   /**
53    * The states in which this regular expression production exists. If
54    * this array is null, then "<*>" has been specified and this regular
55    * expression exists in all states. However, this null value is
56    * replaced by a String array that includes all lexical state names
57    * during the semanticization phase.
58    */
59   public String JavaDoc[] lexStates;
60
61   /**
62    * The kind of this token production - TOKEN, SKIP, MORE, or SPECIAL.
63    */
64   public int kind;
65
66   /**
67    * The list of regular expression specifications that comprise this
68    * production. Each entry is a "RegExprSpec".
69    */
70   public java.util.Vector JavaDoc respecs = new java.util.Vector JavaDoc();
71
72   /**
73    * This is true if this corresponds to a production that actually
74    * appears in the input grammar. Otherwise (if this is created to
75    * describe a regular expression that is part of the BNF) this is set
76    * to false.
77    */
78   public boolean isExplicit = true;
79
80   /**
81    * This is true if case is to be ignored within the regular expressions
82    * of this token production.
83    */
84   public boolean ignoreCase = false;
85
86   /**
87    * The first and last tokens from the input stream that represent this
88    * production.
89    */
90   public Token firstToken, lastToken;
91
92 }
93
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