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1 /* |
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2 |
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3 Copyright (C) 1996, 1997, 2000, 2001, 2002, 2004, 2005, 2007 |
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4 John W. Eaton |
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5 |
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6 This file is part of Octave. |
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7 |
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8 Octave is free software; you can redistribute it and/or modify it |
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9 under the terms of the GNU General Public License as published by the |
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10 Free Software Foundation; either version 3 of the License, or (at your |
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11 option) any later version. |
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12 |
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13 Octave is distributed in the hope that it will be useful, but WITHOUT |
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14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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16 for more details. |
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17 |
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18 You should have received a copy of the GNU General Public License |
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19 along with Octave; see the file COPYING. If not, see |
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20 <http://www.gnu.org/licenses/>. |
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21 |
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22 */ |
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23 |
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24 #if !defined (octave_tree_h) |
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25 #define octave_tree_h 1 |
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26 |
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27 #include <string> |
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28 |
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29 #include <iostream> |
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30 |
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31 class octave_function; |
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32 class tree_walker; |
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33 |
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34 // Base class for the parse tree. |
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35 |
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36 class |
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37 tree |
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38 { |
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39 public: |
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40 |
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41 tree (int l = -1, int c = -1) : break_point(false) |
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42 { |
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43 line_num = l; |
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44 column_num = c; |
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45 } |
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46 |
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47 virtual ~tree (void) { } |
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48 |
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49 virtual int line (void) const |
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50 { return line_num; } |
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51 |
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52 virtual int column (void) const |
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53 { return column_num; } |
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54 |
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55 virtual void accept (tree_walker& tw) = 0; |
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56 |
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57 std::string str_print_code (void); |
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58 |
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59 virtual void set_breakpoint (void) |
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60 { break_point = true; } |
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61 |
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62 virtual void delete_breakpoint (void) |
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63 { break_point = false; } |
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64 |
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65 virtual bool is_breakpoint (void) const |
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66 { return break_point; } |
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67 |
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68 // If true, stop executing at the next possible point. |
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69 static bool break_next; |
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70 |
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71 // The line where dbnext was executed. |
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72 static int last_line; |
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73 |
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74 // The function where the last breakpoint occurred. |
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75 static const octave_function *break_function; |
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76 |
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77 // The statement where the last breakpoint occurred. |
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78 static const tree *break_statement; |
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79 |
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80 private: |
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81 |
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82 // The input line and column where we found the text that was |
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83 // eventually converted to this tree node. |
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84 int line_num; |
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85 int column_num; |
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86 |
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87 // Stop before executing this tree node |
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88 bool break_point; |
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89 |
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90 // No copying! |
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91 |
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92 tree (const tree&); |
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93 |
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94 tree& operator = (const tree&); |
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95 }; |
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96 |
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97 #endif |
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98 |
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99 /* |
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100 ;;; Local Variables: *** |
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101 ;;; mode: C++ *** |
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102 ;;; End: *** |
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103 */ |
