2987
|
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 |
2991
|
30 #include <string> |
|
31 |
3503
|
32 #include <iostream> |
2991
|
33 |
2987
|
34 class tree_walker; |
|
35 |
|
36 // Base class for the parse tree. |
|
37 |
|
38 class |
|
39 tree |
|
40 { |
|
41 public: |
|
42 |
3770
|
43 tree (int l = -1, int c = -1) : break_point(false) |
2987
|
44 { |
|
45 line_num = l; |
|
46 column_num = c; |
|
47 } |
|
48 |
|
49 virtual ~tree (void) { } |
|
50 |
|
51 virtual int line (void) const |
|
52 { return line_num; } |
|
53 |
|
54 virtual int column (void) const |
|
55 { return column_num; } |
|
56 |
|
57 virtual void accept (tree_walker& tw) = 0; |
|
58 |
3523
|
59 std::string str_print_code (void); |
2991
|
60 |
3770
|
61 virtual void set_breakpoint (void) |
|
62 { break_point = true; } |
|
63 |
|
64 virtual void delete_breakpoint (void) |
|
65 { break_point = false; } |
|
66 |
|
67 virtual bool is_breakpoint (void) const |
|
68 { return break_point; } |
|
69 |
3772
|
70 // If true, stop executing at the next possible point. |
|
71 static bool break_next; |
|
72 |
2987
|
73 private: |
|
74 |
|
75 // The input line and column where we found the text that was |
|
76 // eventually converted to this tree node. |
|
77 int line_num; |
|
78 int column_num; |
|
79 |
3770
|
80 // Stop before executing this tree node |
|
81 bool break_point; |
|
82 |
2987
|
83 // No copying! |
|
84 |
|
85 tree (const tree&); |
|
86 |
|
87 tree& operator = (const tree&); |
|
88 }; |
|
89 |
|
90 #endif |
|
91 |
|
92 /* |
|
93 ;;; Local Variables: *** |
|
94 ;;; mode: C++ *** |
|
95 ;;; End: *** |
|
96 */ |