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annotate libinterp/corefcn/call-stack.h @ 28426:9a3deb17b4ea stable

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use shared_ptr for stack frames in call stack and for accesss and static links * call-stack.h, call-stack.cc: Use std::shared_ptr<stack_frame> instead of bare pointer for elements of call stack. Change all uses. * stack-frame.h, stack-frame.cc (stack_frame::static_link, stack_frame::access_link): Use std::shared_ptr<stack_frame> instead of bare pointer. Change all uses. (stack_frame::workspace): New function. * ov-fcn-handle.h, ov-fcn-handle.cc (octave_fcn_handle::m_closure_frames): Now a std::shared_ptr<stack_frame> object instead of a list of copied stack frames. Change all uses. (octave_fcn_handle::push_closure_context): Simply store std::shared_ptr to current stack frame. (octave_fcn_handle::workspace): Call stack_frame::workspace to get workspace info when we have closure frames.
author John W. Eaton <jwe@octave.org>
date Sat, 25 Apr 2020 13:17:11 -0400
parents 5cb09ac94e81
children 8eb8ba8aff9a
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1 ////////////////////////////////////////////////////////////////////////
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2 //
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3 // Copyright (C) 1993-2020 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 namespace octave
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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 size_t current_frame (void) const { return m_curr_frame; }
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88
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89 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 (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) const;
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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 std::shared_ptr<stack_frame> get_static_link (size_t prev_frame) const;
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157
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158 void push (const symbol_scope& scope);
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159
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160 void push (octave_user_function *fcn, unwind_protect *up_frame,
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161 const std::shared_ptr<stack_frame>& closure_frames = std::shared_ptr<stack_frame> ());
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162
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163 void push (octave_user_script *script, unwind_protect *up_frame);
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164
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165 void push (octave_function *fcn);
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166
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167 void set_location (int l, int c)
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168 {
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169 if (! m_cs.empty ())
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170 {
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171 std::shared_ptr<stack_frame> elt = m_cs.back ();
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172
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173 elt->line (l);
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174 elt->column (c);
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175 }
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176 }
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177
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178 void set_line (int l)
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179 {
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180 if (! m_cs.empty ())
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181 {
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182 std::shared_ptr<stack_frame> elt = m_cs.back ();
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183
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184 elt->line (l);
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185 }
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186 }
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187
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188 void set_column (int c)
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189 {
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190 if (! m_cs.empty ())
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191 {
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192 std::shared_ptr<stack_frame> elt = m_cs.back ();
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193
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194 elt->column (c);
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195 }
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196 }
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197
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198 bool goto_frame (size_t n = 0, bool verbose = false);
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199
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200 void restore_frame (size_t n)
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201 {
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202 goto_frame (n);
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203 }
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204
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205 size_t find_current_user_frame (void) const;
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206
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207 std::shared_ptr<stack_frame> current_user_frame (void) const;
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208
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209 size_t dbupdown (size_t start, int n, bool verbose);
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210 size_t dbupdown (int n = -1, bool verbose = false);
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211
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212 void goto_caller_frame (void);
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213
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214 void goto_base_frame (void);
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215
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216 std::list<std::shared_ptr<stack_frame>>
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217 backtrace_frames (octave_idx_type& curr_user_frame) const;
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218
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219 // List of raw stack frames.
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220
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221 std::list<std::shared_ptr<stack_frame>> backtrace_frames (void) const;
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222
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223 // List of stack_info objects that can be used in liboctave and
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224 // stored in the execution_exception object.
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225
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226 std::list<frame_info> backtrace_info (octave_idx_type& curr_user_frame,
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227 bool print_subfn = true) const;
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228
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229 std::list<frame_info> backtrace_info (void) const;
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230
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231 // The same as backtrace_info but in the form of a struct array
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232 // object that may be used in the interpreter.
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233
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234 octave_map backtrace (octave_idx_type& curr_user_frame,
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235 bool print_subfn = true) const;
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236
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237 octave_map backtrace (void) const;
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238
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239 octave_map empty_backtrace (void) const;
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240
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241 void pop (void);
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242
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243 void clear (void);
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244
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245 symbol_info_list all_variables (void);
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246
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247 std::list<std::string> global_variable_names (void) const;
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248
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249 std::list<std::string> top_level_variable_names (void) const;
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250
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251 std::list<std::string> variable_names (void) const;
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252
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253 void clear_global_variable (const std::string& name);
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254
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255 void clear_global_variable_pattern (const std::string& pattern);
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256
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257 void clear_global_variable_regexp(const std::string& pattern);
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258
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259 void clear_global_variables (void);
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260
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261 symbol_info_list glob_symbol_info (const std::string& pattern) const;
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262
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263 symbol_info_list regexp_symbol_info (const std::string& pattern) const;
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264
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265 symbol_info_list get_symbol_info (void);
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266
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267 symbol_info_list top_scope_symbol_info (void) const;
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268
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269 octave_value max_stack_depth (const octave_value_list& args, int nargout);
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270
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271 void make_persistent (const symbol_record& sym);
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272
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273 void make_global (const symbol_record& sym);
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274
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275 octave_value global_varval (const std::string& name) const;
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276
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277 octave_value& global_varref (const std::string& name);
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278
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279 octave_value get_top_level_value (const std::string& name) const;
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280
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281 void set_top_level_value (const std::string& name,
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282 const octave_value& value);
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283
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284 octave_value do_who (int argc, const string_vector& argv,
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285 bool return_list, bool verbose = false);
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286
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287 octave_value do_who_two (const string_vector& patterns, bool have_regexp,
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288 bool return_list, bool verbose,
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289 const std::string& msg = "");
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290
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291 octave_value do_global_who_two (const string_vector& patterns,
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292 bool have_regexp, bool return_list,
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293 bool verbose, const std::string& msg = "");
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294
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295 void clear_current_frame_values (void);
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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 tree_evaluator& m_evaluator;
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307
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308 // The current call stack.
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309 // FIXME: maybe we should be using a std::shared_ptr to manage the
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310 // individual stack frames?
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311 stack_frames m_cs;
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312
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313 // FIXME: Could we eliminate this variable and manage the current
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314 // frame in the evaluator class instead? The current frame might
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315 // always be the top of the stack. Restoring the previous/current
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316 // frame would be managed by other means, such as an
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317 // unwind_protect frame.
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318 size_t m_curr_frame;
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319
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320 int m_max_stack_depth;
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321
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322 std::map<std::string, octave_value> m_global_values;
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323 };
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324 }
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325
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326 #endif