GNU Octave  3.8.0
A high-level interpreted language, primarily intended for numerical computations, mostly compatible with Matlab
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pt.h
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1 /*
2 
3 Copyright (C) 1996-2013 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 3 of the License, or (at your
10 option) any 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, see
19 <http://www.gnu.org/licenses/>.
20 
21 */
22 
23 #if !defined (octave_pt_h)
24 #define octave_pt_h 1
25 
26 #include <string>
27 
28 #include <iosfwd>
29 
30 class octave_function;
31 class tree_walker;
32 
33 // Base class for the parse tree.
34 
35 class
36 tree
37 {
38 public:
39 
40  tree (int l = -1, int c = -1)
41  : line_num (l), column_num (c), bp (false) { }
42 
43  virtual ~tree (void) { }
44 
45  virtual int line (void) const { return line_num; }
46 
47  virtual int column (void) const { return column_num; }
48 
49  void line (int l) { line_num = l; }
50 
51  void column (int c) { column_num = c; }
52 
53  void set_location (int l, int c)
54  {
55  line_num = l;
56  column_num = c;
57  }
58 
59  virtual void set_breakpoint (void) { bp = true; }
60 
61  virtual void delete_breakpoint (void) { bp = false; }
62 
63  bool is_breakpoint (void) const { return bp; }
64 
65  std::string str_print_code (void);
66 
67  virtual void accept (tree_walker& tw) = 0;
68 
69 private:
70 
71  // The input line and column where we found the text that was
72  // eventually converted to this tree node.
73  int line_num;
75 
76  // Breakpoint flag.
77  bool bp;
78 
79  // No copying!
80 
81  tree (const tree&);
82 
83  tree& operator = (const tree&);
84 };
85 
86 #endif