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[project @ 1997-05-16 07:05:15 by jwe]
author jwe
date Fri, 16 May 1997 07:05:49 +0000
parents
children fc751d2a99fd
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2986:35b3211c6ff9 2987:ae20b3f37f5e
1 /*
2
3 Copyright (C) 1996, 1997 John W. Eaton
4
5 This file is part of Octave.
6
7 Octave is free software; you can redistribute it and/or modify it
8 under the terms of the GNU General Public License as published by the
9 Free Software Foundation; either version 2, or (at your option) any
10 later version.
11
12 Octave is distributed in the hope that it will be useful, but WITHOUT
13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
15 for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with Octave; see the file COPYING. If not, write to the Free
19 Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
20
21 */
22
23 #if !defined (octave_tree_h)
24 #define octave_tree_h 1
25
26 #if defined (__GNUG__)
27 #pragma interface
28 #endif
29
30 class tree_walker;
31
32 // Base class for the parse tree.
33
34 class
35 tree
36 {
37 public:
38
39 tree (int l = -1, int c = -1)
40 {
41 line_num = l;
42 column_num = c;
43 }
44
45 virtual ~tree (void) { }
46
47 virtual int line (void) const
48 { return line_num; }
49
50 virtual int column (void) const
51 { return column_num; }
52
53 virtual void accept (tree_walker& tw) = 0;
54
55 private:
56
57 // The input line and column where we found the text that was
58 // eventually converted to this tree node.
59 int line_num;
60 int column_num;
61
62 // No copying!
63
64 tree (const tree&);
65
66 tree& operator = (const tree&);
67 };
68
69 #endif
70
71 /*
72 ;;; Local Variables: ***
73 ;;; mode: C++ ***
74 ;;; End: ***
75 */