annotate libinterp/parse-tree/pt-except.h @ 23220:092078913d54

maint: Merge stable to default.
author John W. Eaton <jwe@octave.org>
date Wed, 22 Feb 2017 12:58:07 -0500
parents ef4d915df748 3ac9f9ecfae5
children c452180ab672
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1 /*
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2
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3 Copyright (C) 1996-2017 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
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9 the Free Software Foundation; either version 3 of the License, or
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10 (at your 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
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13 WITHOUT ANY WARRANTY; without even the implied warranty of
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14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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15 GNU General Public License 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_pt_except_h)
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24 #define octave_pt_except_h 1
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25
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26 #include "octave-config.h"
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27
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28 #include "comment-list.h"
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29 #include "pt-cmd.h"
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30 #include "pt-id.h"
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31 #include "symtab.h"
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32
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33 namespace octave
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34 {
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35 class tree_statement_list;
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36
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37 class tree_walker;
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38
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39 // Simple exception handling.
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40
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41 class tree_try_catch_command : public tree_command
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42 {
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43 public:
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44
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45 tree_try_catch_command (int l = -1, int c = -1)
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46 : tree_command (l, c), try_code (0), catch_code (0), expr_id (0),
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47 lead_comm (0), mid_comm (0), trail_comm (0) { }
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48
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49 tree_try_catch_command (tree_statement_list *tc, tree_statement_list *cc,
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50 tree_identifier *id,
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51 octave_comment_list *cl = 0,
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52 octave_comment_list *cm = 0,
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53 octave_comment_list *ct = 0,
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54 int l = -1, int c = -1)
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55 : tree_command (l, c), try_code (tc), catch_code (cc), expr_id (id),
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56 lead_comm (cl), mid_comm (cm), trail_comm (ct) { }
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57
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58 // No copying!
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59
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60 tree_try_catch_command (const tree_try_catch_command&) = delete;
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61
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62 tree_try_catch_command& operator = (const tree_try_catch_command&) = delete;
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63
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64 ~tree_try_catch_command (void);
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65
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66 tree_identifier *identifier (void) { return expr_id; }
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67
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68 tree_statement_list *body (void) { return try_code; }
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69
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70 tree_statement_list *cleanup (void) { return catch_code; }
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71
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72 octave_comment_list *leading_comment (void) { return lead_comm; }
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74 octave_comment_list *middle_comment (void) { return mid_comm; }
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75
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76 octave_comment_list *trailing_comment (void) { return trail_comm; }
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77
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78 tree_command *dup (symbol_table::scope_id scope,
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79 symbol_table::context_id context) const;
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80
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81 void accept (tree_walker& tw);
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82
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83 private:
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84
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85 // The first block of code to attempt to execute.
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86 tree_statement_list *try_code;
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87
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88 // The code to execute if an error occurs in the first block.
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89 tree_statement_list *catch_code;
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90
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91 // Identifier to modify.
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92 tree_identifier *expr_id;
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93
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94 // Comment preceding TRY token.
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95 octave_comment_list *lead_comm;
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96
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97 // Comment preceding CATCH token.
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98 octave_comment_list *mid_comm;
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99
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100 // Comment preceding END_TRY_CATCH token.
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101 octave_comment_list *trail_comm;
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102 };
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103
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104 // Simple exception handling.
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105
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106 class tree_unwind_protect_command : public tree_command
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107 {
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108 public:
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109
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110 tree_unwind_protect_command (int l = -1, int c = -1)
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111 : tree_command (l, c), unwind_protect_code (0), cleanup_code (0),
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112 lead_comm (0), mid_comm (0), trail_comm (0) { }
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114 tree_unwind_protect_command (tree_statement_list *tc,
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115 tree_statement_list *cc,
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116 octave_comment_list *cl = 0,
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117 octave_comment_list *cm = 0,
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118 octave_comment_list *ct = 0,
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119 int l = -1, int c = -1)
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120 : tree_command (l, c), unwind_protect_code (tc), cleanup_code (cc),
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121 lead_comm (cl), mid_comm (cm), trail_comm (ct) { }
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122
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123 // No copying!
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124
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125 tree_unwind_protect_command (const tree_unwind_protect_command&) = delete;
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126
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127 tree_unwind_protect_command&
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128 operator = (const tree_unwind_protect_command&) = delete;
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129
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130 ~tree_unwind_protect_command (void);
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131
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132 tree_statement_list *body (void) { return unwind_protect_code; }
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133
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134 tree_statement_list *cleanup (void) { return cleanup_code; }
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135
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136 octave_comment_list *leading_comment (void) { return lead_comm; }
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137
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138 octave_comment_list *middle_comment (void) { return mid_comm; }
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139
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140 octave_comment_list *trailing_comment (void) { return trail_comm; }
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141
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142 tree_command *dup (symbol_table::scope_id scope,
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143 symbol_table::context_id context) const;
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144
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145 void accept (tree_walker& tw);
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146
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147 private:
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148
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149 // The first body of code to attempt to execute.
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150 tree_statement_list *unwind_protect_code;
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151
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152 // The body of code to execute no matter what happens in the first
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153 // body of code.
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154 tree_statement_list *cleanup_code;
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155
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156 // Comment preceding UNWIND_PROTECT token.
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157 octave_comment_list *lead_comm;
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158
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159 // Comment preceding UNWIND_PROTECT_CLEANUP token.
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160 octave_comment_list *mid_comm;
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161
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162 // Comment preceding END_UNWIND_PROTECT token.
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163 octave_comment_list *trail_comm;
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164 };
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165 }
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166
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167 #if defined (OCTAVE_USE_DEPRECATED_FUNCTIONS)
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168
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169 OCTAVE_DEPRECATED ("use 'octave::tree_try_catch_command' instead")
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170 typedef octave::tree_try_catch_command tree_try_catch_command;
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171
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172 OCTAVE_DEPRECATED ("use 'octave::tree_unwind_protect_command' instead")
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173 typedef octave::tree_unwind_protect_command tree_unwind_protect_command;
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174
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175 #endif
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176
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177 #endif