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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 3 of the License, or (at your |
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10 option) any 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, see |
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19 <http://www.gnu.org/licenses/>. |
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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 class tree_statement_list; |
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27 |
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28 class tree_walker; |
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29 |
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30 #include "comment-list.h" |
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31 #include "pt-cmd.h" |
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32 |
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33 // Simple exception handling. |
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34 |
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35 class |
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36 tree_try_catch_command : public tree_command |
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37 { |
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38 public: |
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39 |
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40 tree_try_catch_command (int l = -1, int c = -1) |
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41 : tree_command (l, c), try_code (0), catch_code (0), lead_comm (0), |
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42 mid_comm (0), trail_comm (0) { } |
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43 |
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44 tree_try_catch_command (tree_statement_list *tc, tree_statement_list *cc, |
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45 octave_comment_list *cl = 0, |
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46 octave_comment_list *cm = 0, |
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47 octave_comment_list *ct = 0, |
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48 int l = -1, int c = -1) |
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49 : tree_command (l, c), try_code (tc), catch_code (cc), |
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50 lead_comm (cl), mid_comm (cm), trail_comm (ct) { } |
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51 |
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52 ~tree_try_catch_command (void); |
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53 |
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54 void eval (void); |
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55 |
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56 tree_statement_list *body (void) { return try_code; } |
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57 |
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58 tree_statement_list *cleanup (void) { return catch_code; } |
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59 |
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60 octave_comment_list *leading_comment (void) { return lead_comm; } |
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61 |
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62 octave_comment_list *middle_comment (void) { return mid_comm; } |
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63 |
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64 octave_comment_list *trailing_comment (void) { return trail_comm; } |
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65 |
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66 tree_command *dup (symbol_table *sym_tab); |
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67 |
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68 void accept (tree_walker& tw); |
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69 |
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70 private: |
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71 |
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72 // The first block of code to attempt to execute. |
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73 tree_statement_list *try_code; |
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74 |
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75 // The code to execute if an error occurs in the first block. |
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76 tree_statement_list *catch_code; |
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77 |
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78 // Comment preceding TRY token. |
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79 octave_comment_list *lead_comm; |
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80 |
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81 // Comment preceding CATCH token. |
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82 octave_comment_list *mid_comm; |
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83 |
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84 // Comment preceding END_TRY_CATCH token. |
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85 octave_comment_list *trail_comm; |
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86 |
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87 // No copying! |
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88 |
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89 tree_try_catch_command (const tree_try_catch_command&); |
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90 |
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91 tree_try_catch_command& operator = (const tree_try_catch_command&); |
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92 }; |
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93 |
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94 // Simple exception handling. |
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95 |
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96 class |
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97 tree_unwind_protect_command : public tree_command |
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98 { |
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99 public: |
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100 |
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101 tree_unwind_protect_command (int l = -1, int c = -1) |
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102 : tree_command (l, c), unwind_protect_code (0), cleanup_code (0), |
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103 lead_comm (0), mid_comm (0), trail_comm (0) { } |
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104 |
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105 tree_unwind_protect_command (tree_statement_list *tc, |
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106 tree_statement_list *cc, |
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107 octave_comment_list *cl = 0, |
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108 octave_comment_list *cm = 0, |
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109 octave_comment_list *ct = 0, |
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110 int l = -1, int c = -1) |
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111 : tree_command (l, c), unwind_protect_code (tc), cleanup_code (cc), |
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112 lead_comm (cl), mid_comm (cm), trail_comm (ct) { } |
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113 |
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114 ~tree_unwind_protect_command (void); |
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115 |
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116 void eval (void); |
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117 |
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118 tree_statement_list *body (void) { return unwind_protect_code; } |
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119 |
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120 tree_statement_list *cleanup (void) { return cleanup_code; } |
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121 |
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122 octave_comment_list *leading_comment (void) { return lead_comm; } |
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123 |
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124 octave_comment_list *middle_comment (void) { return mid_comm; } |
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125 |
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126 octave_comment_list *trailing_comment (void) { return trail_comm; } |
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127 |
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128 tree_command *dup (symbol_table *sym_tab); |
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129 |
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130 void accept (tree_walker& tw); |
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131 |
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132 private: |
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133 |
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134 // The first body of code to attempt to execute. |
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135 tree_statement_list *unwind_protect_code; |
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136 |
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137 // The body of code to execute no matter what happens in the first |
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138 // body of code. |
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139 tree_statement_list *cleanup_code; |
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140 |
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141 // Comment preceding TRY token. |
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142 octave_comment_list *lead_comm; |
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143 |
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144 // Comment preceding CATCH token. |
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145 octave_comment_list *mid_comm; |
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146 |
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147 // Comment preceding END_TRY_CATCH token. |
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148 octave_comment_list *trail_comm; |
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149 |
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150 // No copying! |
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151 |
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152 tree_unwind_protect_command (const tree_unwind_protect_command&); |
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153 |
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154 tree_unwind_protect_command& operator = (const tree_unwind_protect_command&); |
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155 }; |
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156 |
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157 #endif |
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158 |
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159 /* |
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160 ;;; Local Variables: *** |
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161 ;;; mode: C++ *** |
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162 ;;; End: *** |
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163 */ |
