RegExp1


1   /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
2    * JFlex 1.4.1                                                             *
3    * Copyright (C) 1998-2004  Gerwin Klein <lsf@jflex.de>                    *
4    * All rights reserved.                                                    *
5    *                                                                         *
6    * This program is free software; you can redistribute it and/or modify    *
7    * it under the terms of the GNU General Public License. See the file      *
8    * COPYRIGHT for more information.                                         *
9    *                                                                         *
10   * This program is distributed in the hope that it will be useful,         *
11   * but WITHOUT ANY WARRANTY; without even the implied warranty of          *
12   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the           *
13   * GNU General Public License for more details.                            *
14   *                                                                         *
15   * You should have received a copy of the GNU General Public License along *
16   * with this program; if not, write to the Free Software Foundation, Inc., *
17   * 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA                 *
18   *                                                                         *
19   * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
20  
21  package JFlex;
22  
23  
24  /**
25   * Stores a regular expression from the rules section of a JFlex specification.
26   *
27   * This class provides storage for one Object of content.
28   * It is used for all regular expressions that are constructed from one object.
29   * 
30   * For instance:  a*  is new RegExp1(sym.STAR, new Character ('a'));
31   *
32   * @author Gerwin Klein
33   * @version JFlex 1.4.1, $Revision: 2.2 $, $Date: 2004/11/06 23:03:32 $
34   */
35  public class RegExp1 extends RegExp {
36  
37    /**
38     * The child of this expression node in the syntax tree of a regular expression.
39     */
40    Object   content;
41  
42    
43    /**
44     * Constructs a new regular expression with one child object.
45     *
46     * @param type   a value from the cup generated class sym, defining the 
47     *               kind of this regular expression
48     *
49     * @param content  the child of this expression
50     */
51    public RegExp1(int type, Object   content) {
52      super(type);
53      this.content = content;
54    }
55    
56  
57    /**
58     * Returns a String-representation of this regular expression
59     * with the specified indentation.
60     *
61     * @param tab   a String that should contain only space characters and
62     *              that is inserted in front of standard String-representation
63     *              pf this object.
64     */
65    public String   print(String   tab) {
66      if (content instanceof RegExp) {
67        return tab+"type = "+type+Out.NL+tab+"content :"+Out.NL+((RegExp)content).print(tab+"  ");
68      }
69      else
70        return tab+"type = "+type+Out.NL+tab+"content :"+Out.NL+tab+"  "+content;
71    }
72  
73    
74    /**
75     * Returns a String-representation of this regular expression
76     */
77    public String   toString() {
78      return print("");
79    }
80  }
81
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