NormalProduction


1   /*
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3    * California 95054, U.S.A. All rights reserved.  Sun Microsystems, Inc. has
4    * intellectual property rights relating to technology embodied in the product
5    * that is described in this document. In particular, and without limitation,
6    * these intellectual property rights may include one or more of the U.S.
7    * patents listed at http://www.sun.com/patents and one or more additional
8    * patents or pending patent applications in the U.S. and in other countries.
9    * U.S. Government Rights - Commercial software. Government users are subject
10   * to the Sun Microsystems, Inc. standard license agreement and applicable
11   * provisions of the FAR and its supplements.  Use is subject to license terms.
12   * Sun,  Sun Microsystems,  the Sun logo and  Java are trademarks or registered
13   * trademarks of Sun Microsystems, Inc. in the U.S. and other countries.  This
14   * product is covered and controlled by U.S. Export Control laws and may be
15   * subject to the export or import laws in other countries.  Nuclear, missile,
16   * chemical biological weapons or nuclear maritime end uses or end users,
17   * whether direct or indirect, are strictly prohibited.  Export or reexport
18   * to countries subject to U.S. embargo or to entities identified on U.S.
19   * export exclusion lists, including, but not limited to, the denied persons
20   * and specially designated nationals lists is strictly prohibited.
21   */
22  
23  package org.javacc.parser;
24  
25  /**
26   * Describes JavaCC productions.
27   */
28  
29  public class NormalProduction {
30  
31    /**
32     * The line and column number of the construct that corresponds
33     * most closely to this node.
34     */
35    public int line, column;
36  
37    /**
38     * The NonTerminal nodes which refer to this production.
39     */
40    java.util.Vector   parents = new java.util.Vector  ();
41  
42    /**
43     * The access modifier of this production.
44     */
45    public String   accessMod;
46  
47    /**
48     * The name of the non-terminal of this production.
49     */
50    public String   lhs;
51  
52    /**
53     * The tokens that make up the return type of this production.
54     */
55    public java.util.Vector   return_type_tokens = new java.util.Vector  ();
56  
57    /**
58     * The tokens that make up the parameters of this production.
59     */
60    public java.util.Vector   parameter_list_tokens = new java.util.Vector  ();
61  
62    /**
63     * Each entry in this vector is a vector of tokens that represents an
64     * exception in the throws list of this production.  This list does not
65     * include ParseException which is always thrown.
66     */
67    public java.util.Vector   throws_list = new java.util.Vector  ();
68  
69    /**
70     * The RHS of this production.  Not used for JavaCodeProduction.
71     */
72    public Expansion expansion;
73  
74    /**
75     * This boolean flag is true if this production can expand to empty.
76     */
77    boolean emptyPossible = false;
78  
79    /**
80     * A list of all non-terminals that this one can expand to without
81     * having to consume any tokens.  Also an index that shows how many
82     * pointers exist.
83     */
84    NormalProduction[] leftExpansions = new NormalProduction[10];
85    int leIndex = 0;
86  
87    /**
88     * The following variable is used to maintain state information for the
89     * left-recursion determination algorithm:  It is initialized to 0, and
90     * set to -1 if this node has been visited in a pre-order walk, and then
91     * it is set to 1 if the pre-order walk of the whole graph from this
92     * node has been traversed.  i.e., -1 indicates partially processed,
93     * and 1 indicates fully processed.
94     */
95    int walkStatus = 0;
96  
97    /**
98     * The first and last tokens from the input stream that represent this
99     * production.
100    */
101   public Token firstToken, lastToken;
102 
103 }
104
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