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annotate libinterp/corefcn/symscope.cc @ 26040:0af4653e48a4

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install auto function vars in symbol scope when parsing function * symscope.h, symscope.cc (symbol_scope::install_auto_fcn_vars, symbol_scope_rep::install_auto_fcn_vars, symbol_scope_rep::install_auto_fcn_var): New functions. * oct-parse.yy (base_parser::finish_function): Call symbol_scope::install_auto_fcn_vars.
author John W. Eaton <jwe@octave.org>
date Sat, 03 Nov 2018 09:27:37 -0400
parents c80323fe4938
children edcb09d4b1f5
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 /*
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2
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3 Copyright (C) 1993-2018 John W. Eaton
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4 Copyright (C) 2009 VZLU Prague, a.s.
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5
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6 This file is part of Octave.
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7
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8 Octave is free software: you can redistribute it and/or modify it
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9 under the terms of the GNU General Public License as published by
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10 the Free Software Foundation, either version 3 of the License, or
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11 (at your option) any later version.
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12
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13 Octave is distributed in the hope that it will be useful, but
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14 WITHOUT ANY WARRANTY; without even the implied warranty of
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15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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16 GNU General Public License for more details.
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17
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18 You should have received a copy of the GNU General Public License
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19 along with Octave; see the file COPYING. If not, see
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20 <https://www.gnu.org/licenses/>.
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21
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22 */
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23
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24 #if defined (HAVE_CONFIG_H)
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25 # include "config.h"
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26 #endif
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27
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28 #include <sstream>
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29
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30 #include "fcn-info.h"
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31 #include "interpreter-private.h"
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32 #include "interpreter.h"
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33 #include "ov-fcn.h"
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34 #include "ov-usr-fcn.h"
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35 #include "symrec.h"
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36 #include "symscope.h"
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37 #include "symtab.h"
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38 #include "utils.h"
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39
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40 namespace octave
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41 {
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42 void symbol_scope_rep::install_auto_fcn_vars (void)
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43 {
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44 install_auto_fcn_var (".argn.");
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45 install_auto_fcn_var (".ignored.");
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46 install_auto_fcn_var (".nargin.");
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47 install_auto_fcn_var (".nargout.");
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48 install_auto_fcn_var (".saved_warning_states.");
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49 }
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50
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51 void symbol_scope_rep::install_auto_fcn_var (const std::string& name)
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52 {
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53 insert (name, true);
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54 mark_hidden (name);
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55 mark_automatic (name);
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56 }
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57
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58 octave_value
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59 symbol_scope_rep::find (const std::string& name,
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60 const octave_value_list& args,
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61 bool skip_variables, bool local_funcs)
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62 {
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63 // Variable.
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64
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65 symbol_table& symtab
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66 = __get_symbol_table__ ("symbol_scope_rep::find");
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67
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68 if (! skip_variables)
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69 {
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70 table_iterator p = m_symbols.find (name);
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71
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72 if (p != m_symbols.end ())
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73 {
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74 symbol_record sr = p->second;
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75
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76 if (sr.is_global ())
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77 return symtab.global_varval (name);
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78 else
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79 {
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80 octave_value val = sr.varval (m_context);
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81
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82 if (val.is_defined ())
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83 return val;
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84 }
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85 }
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86 }
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87
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88 if (local_funcs)
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89 {
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90 // Subfunction. I think it only makes sense to check for
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91 // subfunctions if we are currently executing a function defined
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92 // from a .m file.
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93
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94 octave_value fcn = find_subfunction (name);
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95
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96 if (fcn.is_defined ())
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97 return fcn;
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98 }
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99
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100 return symtab.fcn_table_find (name, args, local_funcs);
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101 }
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102
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103 symbol_record&
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104 symbol_scope_rep::insert (const std::string& name, bool force_add)
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105 {
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106 table_iterator p = m_symbols.find (name);
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107
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108 if (p == m_symbols.end ())
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109 {
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110 symbol_record ret (name);
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111
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112 auto t_parent = m_parent.lock ();
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113
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114 if (m_is_nested && t_parent && t_parent->look_nonlocal (name, ret))
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115 return m_symbols[name] = ret;
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116 else
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117 {
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118 if (m_is_static && ! force_add)
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119 ret.mark_added_static ();
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120
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121 return m_symbols[name] = ret;
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122 }
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123 }
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124 else
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125 return p->second;
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126 }
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127
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128 octave_value
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129 symbol_scope_rep::dump (void) const
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130 {
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131 std::map<std::string, octave_value> m
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132 = {{ "name", m_name },
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133 { "symbols", dump_symbols_map () },
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134 { "subfunctions", dump_function_map (m_subfunctions) }};
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135
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136 return octave_value (m);
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137 }
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138
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139 octave_value
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140 symbol_scope_rep::dump_symbols_map (void) const
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141 {
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142 std::map<std::string, octave_value> info_map;
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143
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144 for (const auto& nm_sr : m_symbols)
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145 {
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146 std::string nm = nm_sr.first;
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147 const symbol_record& sr = nm_sr.second;
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148 info_map[nm] = sr.dump (m_context);
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149 }
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150
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151 return octave_value (info_map);
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152 }
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153
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154 octave_value
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155 symbol_scope_rep::find_subfunction (const std::string& name) const
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156 {
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157 subfunctions_const_iterator p = m_subfunctions.find (name);
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158
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159 if (p != m_subfunctions.end ())
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160 return p->second;
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161
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162 auto t_parent = m_parent.lock ();
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163
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164 if (t_parent)
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165 return t_parent->find_subfunction (name);
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166
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167 return octave_value ();
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168 }
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169
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170 void
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171 symbol_scope_rep::mark_subfunctions_in_scope_as_private (const std::string& class_name)
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172 {
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173 for (auto& nm_sf : m_subfunctions)
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174 {
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175 octave_function *fcn = nm_sf.second.function_value ();
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176
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177 if (fcn)
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178 fcn->mark_as_private_function (class_name);
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179 }
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180 }
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181
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182 void
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183 symbol_scope_rep::set_parent (const std::shared_ptr<symbol_scope_rep>& parent)
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184 {
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185 m_parent = std::weak_ptr<symbol_scope_rep> (parent);
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186 }
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187
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188 void
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189 symbol_scope_rep::update_nest (void)
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190 {
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191 auto t_parent = m_parent.lock ();
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192
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193 if (t_parent)
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194 {
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195 // fix bad symbol_records
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196 for (auto& nm_sr : m_symbols)
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197 {
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198 symbol_record& ours = nm_sr.second;
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199
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200 if (! ours.is_formal ()
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201 && m_is_nested && t_parent->look_nonlocal (nm_sr.first, ours))
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202 {
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203 if (ours.is_global () || ours.is_persistent ())
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204 error ("global and persistent may only be used in the topmost level in which a nested variable is used");
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205 }
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206 }
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207
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208 // The scopes of nested functions are static.
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209 if (m_is_nested)
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210 m_is_static = true;
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211 }
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212 else if (m_children.size ())
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213 {
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214 // Parents of nested functions have static scopes.
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215 m_is_static = true;
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216 }
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217
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218 for (auto& scope_obj : m_children)
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219 scope_obj.update_nest ();
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220 }
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221
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222 bool
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223 symbol_scope_rep::look_nonlocal (const std::string& name,
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224 symbol_record& result)
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225 {
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226 table_iterator p = m_symbols.find (name);
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227 if (p == m_symbols.end ())
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228 {
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229 auto t_parent = m_parent.lock ();
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230
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231 if (m_is_nested && t_parent)
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232 return t_parent->look_nonlocal (name, result);
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233 }
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234 else if (! p->second.is_automatic ())
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235 {
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236 result.bind_fwd_rep (shared_from_this (), p->second);
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237 return true;
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238 }
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239
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240 return false;
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241 }
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242
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243 void
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244 symbol_scope_rep::bind_script_symbols
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245 (const std::shared_ptr<symbol_scope_rep>& curr_scope)
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246 {
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247 for (auto& nm_sr : m_symbols)
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248 nm_sr.second.bind_fwd_rep (curr_scope,
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249 curr_scope->find_symbol (nm_sr.first));
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250 }
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251
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252 void
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253 symbol_scope_rep::unbind_script_symbols (void)
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3b302b2890d7 disentangle symbol_record, scope, and fcn_info from symbol_table class
John W. Eaton <jwe@octave.org>
parents:
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254 {
3b302b2890d7 disentangle symbol_record, scope, and fcn_info from symbol_table class
John W. Eaton <jwe@octave.org>
parents:
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255 for (auto& nm_sr : m_symbols)
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c80323fe4938 improve handling of global symbols (bug #53599)
John W. Eaton <jwe@octave.org>
parents: 25054
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256 nm_sr.second.unbind_fwd_rep ();
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3b302b2890d7 disentangle symbol_record, scope, and fcn_info from symbol_table class
John W. Eaton <jwe@octave.org>
parents:
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257 }
3b302b2890d7 disentangle symbol_record, scope, and fcn_info from symbol_table class
John W. Eaton <jwe@octave.org>
parents:
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258 }