annotate libinterp/corefcn/call-stack.h @ 30564:796f54d4ddbf stable

update Octave Project Developers copyright for the new year In files that have the "Octave Project Developers" copyright notice, update for 2021. In all .txi and .texi files except gpl.txi and gpl.texi in the doc/liboctave and doc/interpreter directories, change the copyright to "Octave Project Developers", the same as used for other source files. Update copyright notices for 2022 (not done since 2019). For gpl.txi and gpl.texi, change the copyright notice to be "Free Software Foundation, Inc." and leave the date at 2007 only because this file only contains the text of the GPL, not anything created by the Octave Project Developers. Add Paul Thomas to contributors.in.
author John W. Eaton <jwe@octave.org>
date Tue, 28 Dec 2021 18:22:40 -0500
parents 939bef0b66e0
children e88a07dec498
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1 ////////////////////////////////////////////////////////////////////////
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2 //
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3 // Copyright (C) 1993-2022 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_call_stack_h)
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27 #define octave_call_stack_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 <deque>
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32 #include <memory>
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33 #include <string>
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34
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35 class octave_function;
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36 class octave_map;
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37 class octave_user_code;
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38 class octave_user_script;
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39 class octave_value;
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40 class octave_value_list;
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41
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42 #include "quit.h"
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43
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44 #include "stack-frame.h"
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45 #include "symscope.h"
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46
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47 OCTAVE_NAMESPACE_BEGIN
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48
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49 class tree_evaluator;
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50 class symbol_info_list;
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51 class unwind_protect;
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52
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53 class
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54 OCTINTERP_API
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55 call_stack
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56 {
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57 public:
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58
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59 typedef std::deque<std::shared_ptr<stack_frame>> stack_frames;
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60
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61 typedef stack_frames::iterator iterator;
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62 typedef stack_frames::const_iterator const_iterator;
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63
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64 typedef stack_frames::reverse_iterator reverse_iterator;
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65 typedef stack_frames::const_reverse_iterator const_reverse_iterator;
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66
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67 call_stack (tree_evaluator& evaluator);
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68
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69 // Lock current function. Look for the first stack frame that is
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70 // a function. If SKIP_FIST is true, then skip the first frame.
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71 // That allows functions like Fmlock to find and lock the calling
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72 // function instead of locking Fmlock itself.
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73
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74 octave_function * current_function (bool skip_first = false) const;
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75
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76 octave_function * caller_function (void) const
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77 {
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78 return current_function (true);
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79 }
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80
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81 // Current line in current function.
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82 int current_line (void) const;
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83
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84 // Current column in current function.
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85 int current_column (void) const;
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86
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87 std::size_t current_frame (void) const { return m_curr_frame; }
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88
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89 std::size_t size (void) const { return m_cs.size (); }
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90
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91 std::shared_ptr<stack_frame> get_current_stack_frame (void) const
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92 {
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93 return m_cs[m_curr_frame];
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94 }
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95
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96 symbol_scope top_scope (void) const
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97 {
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98 return m_cs[0]->get_scope ();
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99 }
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100
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101 symbol_scope current_scope (void) const
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102 {
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103 // FIXME: Can m_curr_frame ever be invalid?
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104 return (m_curr_frame < m_cs.size ()
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105 ? m_cs[m_curr_frame]->get_scope () : symbol_scope ());
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106 }
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107
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108 bool at_top_level (void) const
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109 {
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110 return current_scope () == top_scope ();
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111 }
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112
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113 // Function at location N on the call stack (N == 0 is current), may
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114 // be built-in.
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115 octave_function * element (std::size_t n)
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116 {
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117 octave_function *retval = nullptr;
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118
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119 if (m_cs.size () > n)
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120 retval = m_cs[n]->function ();
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121
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122 return retval;
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123 }
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124
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125 // User code caller.
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126 octave_user_code * current_user_code (void) const;
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127
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128 unwind_protect * curr_fcn_unwind_protect_frame (void);
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129
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130 // Line in user code caller.
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131 int current_user_code_line (void) const;
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132
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133 // Column in user code caller.
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134 int current_user_code_column (void) const;
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135
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136 // Current function that we are debugging.
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137 octave_user_code * debug_user_code (void) const;
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138
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139 // Line number in current function that we are debugging.
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140 int debug_user_code_line (void) const;
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141
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142 // Column number in current function that we are debugging.
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143 int debug_user_code_column (void) const;
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144
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145 std::string get_dispatch_class (void) const;
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146
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147 void set_dispatch_class (const std::string& class_name);
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148
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149 bool is_class_method_executing (std::string& dispatch_class) const;
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150
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151 bool is_class_constructor_executing (std::string& dispatch_class) const;
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152
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153 // Return TRUE if all elements on the call stack are scripts.
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154 bool all_scripts (void) const;
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155
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156 void push (const symbol_scope& scope);
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157
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158 void push (octave_user_function *fcn,
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159 const std::shared_ptr<stack_frame>& closure_frames = std::shared_ptr<stack_frame> ());
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160
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161 void push (octave_user_function *fcn,
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162 const stack_frame::local_vars_map& local_vars,
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163 const std::shared_ptr<stack_frame>& closure_frames = std::shared_ptr<stack_frame> ());
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164
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165 void push (octave_user_script *script);
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166
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167 void push (octave_function *fcn);
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168
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169 void set_location (int l, int c)
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170 {
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171 if (! m_cs.empty ())
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172 {
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173 std::shared_ptr<stack_frame> elt = m_cs.back ();
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174
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175 elt->line (l);
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176 elt->column (c);
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177 }
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178 }
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179
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180 void set_line (int l)
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181 {
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182 if (! m_cs.empty ())
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183 {
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184 std::shared_ptr<stack_frame> elt = m_cs.back ();
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185
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186 elt->line (l);
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187 }
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188 }
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189
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190 void set_column (int c)
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191 {
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192 if (! m_cs.empty ())
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193 {
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194 std::shared_ptr<stack_frame> elt = m_cs.back ();
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195
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196 elt->column (c);
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197 }
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198 }
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199
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200 bool goto_frame (std::size_t n = 0, bool verbose = false);
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201
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202 void restore_frame (std::size_t n)
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203 {
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204 goto_frame (n);
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205 }
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206
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207 std::size_t find_current_user_frame (void) const;
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208
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209 std::shared_ptr<stack_frame> current_user_frame (void) const;
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210
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211 std::size_t dbupdown (std::size_t start, int n, bool verbose);
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212 std::size_t dbupdown (int n = -1, bool verbose = false);
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213
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214 void goto_caller_frame (void);
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215
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216 void goto_base_frame (void);
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217
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218 std::list<std::shared_ptr<stack_frame>>
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219 backtrace_frames (octave_idx_type& curr_user_frame) const;
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220
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221 // List of raw stack frames.
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222
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223 std::list<std::shared_ptr<stack_frame>> backtrace_frames (void) const;
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224
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225 // List of stack_info objects that can be used in liboctave and
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226 // stored in the execution_exception object.
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227
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228 std::list<frame_info> backtrace_info (octave_idx_type& curr_user_frame,
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229 bool print_subfn = true) const;
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230
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231 std::list<frame_info> backtrace_info (void) const;
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232
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233 // The same as backtrace_info but in the form of a struct array
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234 // object that may be used in the interpreter.
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235
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236 octave_map backtrace (octave_idx_type& curr_user_frame,
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237 bool print_subfn = true) const;
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238
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239 octave_map backtrace (void) const;
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240
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241 octave_map empty_backtrace (void) const;
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242
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243 void pop (void);
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244
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245 void clear (void);
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246
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247 symbol_info_list all_variables (void);
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248
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249 std::list<std::string> global_variable_names (void) const;
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250
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251 std::list<std::string> top_level_variable_names (void) const;
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252
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253 std::list<std::string> variable_names (void) const;
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254
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255 void clear_global_variable (const std::string& name);
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256
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257 void clear_global_variable_pattern (const std::string& pattern);
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258
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259 void clear_global_variable_regexp(const std::string& pattern);
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260
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261 void clear_global_variables (void);
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262
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263 symbol_info_list glob_symbol_info (const std::string& pattern) const;
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264
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265 symbol_info_list regexp_symbol_info (const std::string& pattern) const;
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266
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267 symbol_info_list get_symbol_info (void);
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268
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269 symbol_info_list top_scope_symbol_info (void) const;
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270
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271 octave_value max_stack_depth (const octave_value_list& args, int nargout);
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272
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273 void make_persistent (const symbol_record& sym);
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274
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275 void make_global (const symbol_record& sym);
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276
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277 octave_value global_varval (const std::string& name) const;
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278
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279 octave_value& global_varref (const std::string& name);
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280
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281 octave_value get_top_level_value (const std::string& name) const;
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282
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283 void set_top_level_value (const std::string& name,
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284 const octave_value& value);
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285
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286 octave_value do_who (int argc, const string_vector& argv,
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287 bool return_list, bool verbose = false);
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288
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289 octave_value do_who_two (const string_vector& patterns, bool have_regexp,
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290 bool return_list, bool verbose,
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291 const std::string& msg = "");
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292
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293 octave_value do_global_who_two (const string_vector& patterns,
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294 bool have_regexp, bool return_list,
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295 bool verbose, const std::string& msg = "");
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296
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297 void display (void) const;
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298
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299 void set_auto_fcn_var (stack_frame::auto_var_type avt,
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300 const octave_value& val);
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301
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302 octave_value get_auto_fcn_var (stack_frame::auto_var_type avt) const;
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303
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304 private:
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305
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306 void get_new_frame_index_and_links
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307 (std::size_t& new_frame_idx, std::shared_ptr<stack_frame>& parent_link,
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308 std::shared_ptr<stack_frame>& static_link) const;
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309
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310 tree_evaluator& m_evaluator;
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311
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312 // The list of stack frames.
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313 stack_frames m_cs;
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314
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315 // The current frame. When a new frame is pushed, m_curr_frame
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316 // moves to the end of the list of stack frames (also referred to as
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317 // the top of the call stack) but may be temporarily moved to
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318 // another location by evalin or debugging functions.
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319
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320 // FIXME: should the current frame be managed by the evaluator
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321 // instead?
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322 std::size_t m_curr_frame;
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323
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324 int m_max_stack_depth;
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325
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326 std::map<std::string, octave_value> m_global_values;
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327 };
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328
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329 OCTAVE_NAMESPACE_END
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330
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331 #endif