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1 /* |
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2 |
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3 Copyright (C) 1996, 1997 John W. Eaton |
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4 |
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5 This file is part of Octave. |
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6 |
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7 Octave is free software; you can redistribute it and/or modify it |
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8 under the terms of the GNU General Public License as published by the |
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9 Free Software Foundation; either version 2, or (at your option) any |
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10 later version. |
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11 |
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12 Octave is distributed in the hope that it will be useful, but WITHOUT |
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13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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15 for more details. |
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16 |
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17 You should have received a copy of the GNU General Public License |
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18 along with Octave; see the file COPYING. If not, write to the Free |
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19 Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
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20 |
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21 */ |
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22 |
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23 #if !defined (octave_tree_except_h) |
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24 #define octave_tree_except_h 1 |
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25 |
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26 #if defined (__GNUG__) |
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27 #pragma interface |
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28 #endif |
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29 |
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30 class tree_statement_list; |
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31 |
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32 class tree_walker; |
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33 |
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34 #include "pt-cmd.h" |
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35 |
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36 // Simple exception handling. |
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37 |
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38 class |
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39 tree_try_catch_command : public tree_command |
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40 { |
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41 public: |
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42 |
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43 tree_try_catch_command (int l = -1, int c = -1) |
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44 : tree_command (l, c), try_code (0), catch_code (0) { } |
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45 |
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46 tree_try_catch_command (tree_statement_list *tc, tree_statement_list *cc, |
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47 int l = -1, int c = -1) |
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48 : tree_command (l, c), try_code (tc), catch_code (cc) { } |
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49 |
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50 ~tree_try_catch_command (void); |
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51 |
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52 void eval (void); |
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53 |
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54 tree_statement_list *body (void) { return try_code; } |
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55 |
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56 tree_statement_list *cleanup (void) { return catch_code; } |
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57 |
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58 void accept (tree_walker& tw); |
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59 |
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60 private: |
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61 |
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62 // The first block of code to attempt to execute. |
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63 tree_statement_list *try_code; |
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64 |
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65 // The code to execute if an error occurs in the first block. |
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66 tree_statement_list *catch_code; |
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67 }; |
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68 |
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69 // Simple exception handling. |
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70 |
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71 class |
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72 tree_unwind_protect_command : public tree_command |
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73 { |
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74 public: |
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75 |
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76 tree_unwind_protect_command (int l = -1, int c = -1) |
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77 : tree_command (l, c), unwind_protect_code (0), cleanup_code (0) { } |
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78 |
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79 tree_unwind_protect_command (tree_statement_list *tc, |
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80 tree_statement_list *cc, |
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81 int l = -1, int c = -1) |
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82 : tree_command (l, c), unwind_protect_code (tc), cleanup_code (cc) { } |
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83 |
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84 ~tree_unwind_protect_command (void); |
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85 |
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86 void eval (void); |
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87 |
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88 tree_statement_list *body (void) { return unwind_protect_code; } |
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89 |
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90 tree_statement_list *cleanup (void) { return cleanup_code; } |
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91 |
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92 void accept (tree_walker& tw); |
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93 |
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94 private: |
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95 |
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96 // The first body of code to attempt to execute. |
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97 tree_statement_list *unwind_protect_code; |
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98 |
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99 // The body of code to execute no matter what happens in the first |
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100 // body of code. |
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101 tree_statement_list *cleanup_code; |
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102 }; |
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103 |
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104 #endif |
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105 |
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106 /* |
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107 ;;; Local Variables: *** |
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108 ;;; mode: C++ *** |
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109 ;;; End: *** |
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110 */ |
