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annotate libinterp/corefcn/symscope.cc @ 24705:8b346a19108e

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mark objects as nested or subfunctions when parsing * oct-parse.in.yy (base_parser::finish_function): Mark functions as nested functions and subfunctions here. * symscope.h, symscope.cc (symbols_scope::install_subfunction, symbol_scope_rep::install_subfunction): Not here. (symbol_scope_rep::install_nestfunction): New function. (symbols_scope::install_subfunction, symbol_scope_rep::install_subfunction): Eliminate is_nested argument. (symbol_scope::install_nestfunction): New argument, fcn_scope. Call symbol_scope::install_subfunction with is_nested = true instead of symbol_scope_rep::install_nestfunction.
author John W. Eaton <jwe@octave.org>
date Thu, 08 Feb 2018 01:08:36 -0500
parents f61502510d08
children 30e1d0bf7ade
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1 /*
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2
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3 Copyright (C) 1993-2017 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 octave_value
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43 symbol_scope_rep::find (const std::string& name,
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44 const octave_value_list& args,
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45 bool skip_variables, bool local_funcs)
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46 {
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47 // Variable.
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48
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49 symbol_table& symtab
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50 = __get_symbol_table__ ("symbol_scope_rep::find");
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51
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52 if (! skip_variables)
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53 {
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54 table_iterator p = m_symbols.find (name);
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55
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56 if (p != m_symbols.end ())
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57 {
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58 symbol_record sr = p->second;
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59
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60 if (sr.is_global ())
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61 return symtab.global_varval (name);
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62 else
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63 {
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64 octave_value val = sr.varval (m_context);
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65
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66 if (val.is_defined ())
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67 return val;
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68 }
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69 }
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70 }
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71
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72 if (local_funcs)
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73 {
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74 // Subfunction. I think it only makes sense to check for
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75 // subfunctions if we are currently executing a function defined
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76 // from a .m file.
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77
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78 octave_value fcn = find_subfunction (name);
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79
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80 if (fcn.is_defined ())
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81 return fcn;
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82 }
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83
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84 return symtab.fcn_table_find (name, args, local_funcs);
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85 }
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86
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87 symbol_record&
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88 symbol_scope_rep::insert (const std::string& name, bool force_add)
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89 {
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90 table_iterator p = m_symbols.find (name);
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91
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92 if (p == m_symbols.end ())
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93 {
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94 symbol_record ret (name);
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95
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96 if (m_is_nested && m_parent && m_parent->look_nonlocal (name, ret))
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97 return m_symbols[name] = ret;
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98 else
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99 {
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100 if (m_is_static && ! force_add)
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101 ret.mark_added_static ();
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102
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103 return m_symbols[name] = ret;
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104 }
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105 }
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106 else
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107 return p->second;
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108 }
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109
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110 octave_value
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111 symbol_scope_rep::dump (void) const
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112 {
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113 std::map<std::string, octave_value> m
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114 = {{ "name", m_name },
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115 { "symbols", dump_symbols_map () },
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116 { "subfunctions", dump_function_map (m_subfunctions) }};
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117
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118 return octave_value (m);
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119 }
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120
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121 octave_value
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122 symbol_scope_rep::dump_symbols_map (void) const
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123 {
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124 std::map<std::string, octave_value> info_map;
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125
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126 for (const auto& nm_sr : m_symbols)
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127 {
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128 std::string nm = nm_sr.first;
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129 const symbol_record& sr = nm_sr.second;
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130 info_map[nm] = sr.dump (m_context);
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131 }
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132
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133 return octave_value (info_map);
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134 }
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135
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136 octave_value
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137 symbol_scope_rep::find_subfunction (const std::string& name) const
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138 {
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139 subfunctions_const_iterator p = m_subfunctions.find (name);
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140
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141 if (p != m_subfunctions.end ())
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142 return p->second;
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143
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144 if (m_parent)
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145 return m_parent->find_subfunction (name);
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146
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147 return octave_value ();
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148 }
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149
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150 void
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151 symbol_scope_rep::mark_subfunctions_in_scope_as_private (const std::string& class_name)
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152 {
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153 for (auto& nm_sf : m_subfunctions)
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154 {
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155 octave_function *fcn = nm_sf.second.function_value ();
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156
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157 if (fcn)
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158 fcn->mark_as_private_function (class_name);
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159 }
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160 }
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161
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162 void
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163 symbol_scope_rep::set_parent (symbol_scope_rep *p)
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164 {
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165 m_parent = p;
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166
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167 if (m_parent)
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168 {
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169 // If m_parent is the top-level scope, there will be no parent
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170 // function.
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171
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172 octave_function *current_fcn = function ();
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173
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174 if (current_fcn && current_fcn->is_anonymous_function ())
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175 {
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176 octave_function *parent_fcn = m_parent->function ();
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177
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178 if (parent_fcn)
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179 m_parent_fcn = octave_value (parent_fcn, true);
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180 }
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181 }
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182 }
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183
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184 void
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185 symbol_scope_rep::update_nest (void)
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186 {
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187 if (m_parent)
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188 {
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189 // fix bad symbol_records
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190 for (auto& nm_sr : m_symbols)
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191 {
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192 symbol_record& ours = nm_sr.second;
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193
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194 if (! ours.is_formal ()
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195 && m_is_nested && m_parent->look_nonlocal (nm_sr.first, ours))
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196 {
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197 if (ours.is_global () || ours.is_persistent ())
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198 error ("global and persistent may only be used in the topmost level in which a nested variable is used");
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199 }
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200 }
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201
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202 // The scopes of nested functions are static.
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203 m_is_static = true;
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204 }
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205 else if (m_children.size ())
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206 {
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207 // Parents of nested functions have static scopes.
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208 m_is_static = true;
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209 }
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210
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211 for (auto& scope_obj : m_children)
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212 scope_obj.update_nest ();
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213 }
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214
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215 bool
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216 symbol_scope_rep::look_nonlocal (const std::string& name,
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217 symbol_record& result)
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218 {
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219 table_iterator p = m_symbols.find (name);
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220 if (p == m_symbols.end ())
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221 {
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222 if (m_is_nested && m_parent)
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223 return m_parent->look_nonlocal (name, result);
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224 }
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225 else if (! p->second.is_automatic ())
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226 {
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227 result.bind_fwd_rep (this, p->second);
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228 return true;
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229 }
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230
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231 return false;
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232 }
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233
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234 void
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235 symbol_scope_rep::bind_script_symbols (symbol_scope_rep *curr_scope)
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236 {
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237 for (auto& nm_sr : m_symbols)
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238 nm_sr.second.bind_fwd_rep (curr_scope,
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239 curr_scope->find_symbol (nm_sr.first));
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240 }
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241
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242 void
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243 symbol_scope_rep::unbind_script_symbols (void)
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244 {
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245 for (auto& nm_sr : m_symbols)
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246 nm_sr.second.unbind_fwd_rep ();
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247 }
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248 }