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annotate libinterp/parse-tree/pt-except.h @ 33639:65b1cf6aa60a bytecode-interpreter tip

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maint: Merge default to bytecode-interpreter
author Arun Giridhar <arungiridhar@gmail.com>
date Mon, 03 Jun 2024 14:38:47 -0400
parents d422992b5483
children
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1 ////////////////////////////////////////////////////////////////////////
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2 //
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3 // Copyright (C) 1996-2024 The Octave Project Developers
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4 //
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5 // See the file COPYRIGHT.md in the top-level directory of this
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6 // distribution or <https://octave.org/copyright/>.
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7 //
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8 // This file is part of Octave.
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9 //
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10 // Octave is free software: you can redistribute it and/or modify it
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11 // under the terms of the GNU General Public License as published by
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12 // the Free Software Foundation, either version 3 of the License, or
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13 // (at your option) any later version.
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14 //
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15 // Octave is distributed in the hope that it will be useful, but
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16 // WITHOUT ANY WARRANTY; without even the implied warranty of
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17 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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18 // GNU General Public License for more details.
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19 //
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20 // You should have received a copy of the GNU General Public License
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21 // along with Octave; see the file COPYING. If not, see
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22 // <https://www.gnu.org/licenses/>.
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23 //
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24 ////////////////////////////////////////////////////////////////////////
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25
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26 #if ! defined (octave_pt_except_h)
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27 #define octave_pt_except_h 1
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28
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29 #include "octave-config.h"
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30
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31 #include "pt-cmd.h"
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32 #include "pt-id.h"
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33 #include "pt-walk.h"
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34
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35 OCTAVE_BEGIN_NAMESPACE(octave)
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36
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37 class comment_list;
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38 class tree_statement_list;
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39
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40 // Simple exception handling.
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41
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42 class tree_try_catch_command : public tree_command
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43 {
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44 public:
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45
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46 tree_try_catch_command (const token try_tok, tree_statement_list *tc, const token catch_tok, tree_identifier *id, tree_statement_list *cc, const token& end_tok)
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47 : m_try_tok (try_tok), m_try_code (tc), m_catch_tok (catch_tok), m_expr_id (id), m_catch_code (cc), m_end_tok (end_tok)
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48 { }
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49
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50 OCTAVE_DISABLE_COPY_MOVE (tree_try_catch_command)
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51
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52 ~tree_try_catch_command ();
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53
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54 filepos beg_pos () const { return m_try_tok.beg_pos (); }
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55 filepos end_pos () const { return m_end_tok.end_pos (); }
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56
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57 tree_identifier * identifier () { return m_expr_id; }
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58
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59 tree_statement_list * body () { return m_try_code; }
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60
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61 tree_statement_list * cleanup () { return m_catch_code; }
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62
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63 void accept (tree_walker& tw)
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64 {
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65 tw.visit_try_catch_command (*this);
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66 }
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67
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68 private:
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69
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70 token m_try_tok;
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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 *m_try_code;
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74
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75 token m_catch_tok;
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76
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77 // Identifier to modify.
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78 tree_identifier *m_expr_id;
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79
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80 // The code to execute if an error occurs in the first block.
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81 tree_statement_list *m_catch_code;
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82
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83 token m_end_tok;
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84 };
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85
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86 // Simple exception handling.
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87
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88 class tree_unwind_protect_command : public tree_command
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89 {
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90 public:
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91
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92 tree_unwind_protect_command (const token& unwind_tok, tree_statement_list *tc, const token& cleanup_tok, tree_statement_list *cc, const token& end_tok)
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93 : m_unwind_tok (unwind_tok), m_unwind_protect_code (tc), m_cleanup_tok (cleanup_tok), m_cleanup_code (cc), m_end_tok (end_tok)
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94 { }
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95
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96 OCTAVE_DISABLE_COPY_MOVE (tree_unwind_protect_command)
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97
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98 ~tree_unwind_protect_command ();
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99
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100 filepos beg_pos () const { return m_unwind_tok.beg_pos (); }
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101 filepos end_pos () const { return m_end_tok.end_pos (); }
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102
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103 tree_statement_list * body () { return m_unwind_protect_code; }
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104
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105 tree_statement_list * cleanup () { return m_cleanup_code; }
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106
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107 void accept (tree_walker& tw)
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108 {
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109 tw.visit_unwind_protect_command (*this);
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110 }
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111
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112 private:
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113
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114 token m_unwind_tok;
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115
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116 // The first body of code to attempt to execute.
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117 tree_statement_list *m_unwind_protect_code;
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118
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119 token m_cleanup_tok;
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120
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121 // The body of code to execute no matter what happens in the first
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122 // body of code.
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123 tree_statement_list *m_cleanup_code;
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124
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125 token m_end_tok;
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126 };
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127
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128 OCTAVE_END_NAMESPACE(octave)
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129
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130 #endif