Mercurial > octave
annotate libinterp/corefcn/symscope.cc @ 24361:8bcfddad15ec
use shared_ptr to manage symbol_scope objects
* symscope.h, symscope.cc (symbol_scope_rep): New class, renamed and
adapted from symbol_scope.
(symbol_scope): New class to manage symbol_scope_rep with shared_ptr.
Change all uses of pointers ot symbol_scope objects to be symbol_scope
objects or, in a few cases, pointers to symbol_scope_rep objects
instead.
author | John W. Eaton <jwe@octave.org> |
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date | Mon, 27 Nov 2017 01:12:05 -0500 |
parents | 8b14ba8296af |
children | 194eb4bd202b |
rev | line source |
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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 <http://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 std::list<workspace_element> |
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111 symbol_scope_rep::workspace_info (void) const |
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112 { |
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113 std::list<workspace_element> retval; |
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114 |
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115 for (const auto& nm_sr : m_symbols) |
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116 { |
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117 std::string nm = nm_sr.first; |
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118 symbol_record sr = nm_sr.second; |
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119 |
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120 if (! sr.is_hidden ()) |
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121 { |
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122 octave_value val = sr.varval (m_context); |
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123 |
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124 if (val.is_defined ()) |
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125 { |
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126 // FIXME: fix size for objects, see kluge in variables.cc |
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127 //dim_vector dv = val.dims (); |
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128 octave_value tmp = val; |
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129 Matrix sz = tmp.size (); |
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130 dim_vector dv = dim_vector::alloc (sz.numel ()); |
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131 for (octave_idx_type i = 0; i < dv.ndims (); i++) |
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132 dv(i) = sz(i); |
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133 |
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134 char storage = ' '; |
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135 if (sr.is_global ()) |
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136 storage = 'g'; |
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137 else if (sr.is_persistent ()) |
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138 storage = 'p'; |
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139 else if (sr.is_automatic ()) |
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140 storage = 'a'; |
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141 else if (sr.is_formal ()) |
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142 storage = 'f'; |
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143 else if (sr.is_hidden ()) |
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144 storage = 'h'; |
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145 else if (sr.is_inherited ()) |
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146 storage = 'i'; |
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147 |
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148 std::ostringstream buf; |
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149 val.short_disp (buf); |
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150 std::string short_disp_str = buf.str (); |
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151 |
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152 workspace_element elt (storage, nm, val.class_name (), |
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153 short_disp_str, dv.str (), |
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154 val.iscomplex ()); |
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155 |
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156 retval.push_back (elt); |
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157 } |
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158 } |
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159 } |
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160 |
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161 return retval; |
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162 } |
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163 |
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164 octave_value |
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165 symbol_scope_rep::dump (void) const |
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166 { |
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167 std::map<std::string, octave_value> m |
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168 = {{ "name", m_name }, |
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169 { "symbols", dump_symbols_map () }, |
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170 { "subfunctions", dump_function_map (m_subfunctions) }}; |
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171 |
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172 return octave_value (m); |
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173 } |
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174 |
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175 octave_value |
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176 symbol_scope_rep::dump_symbols_map (void) const |
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177 { |
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178 std::map<std::string, octave_value> info_map; |
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179 |
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180 for (const auto& nm_sr : m_symbols) |
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181 { |
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182 std::string nm = nm_sr.first; |
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183 const symbol_record& sr = nm_sr.second; |
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184 info_map[nm] = sr.dump (m_context); |
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185 } |
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186 |
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187 return octave_value (info_map); |
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188 } |
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189 |
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190 void |
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191 symbol_scope_rep::install_subfunction (const std::string& name, |
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192 const octave_value& fval, |
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193 bool is_nested) |
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194 { |
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195 m_subfunctions[name] = fval; |
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196 |
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197 // This can be simpler once the scope object is stored in the function |
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198 // object... |
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199 octave_user_function *fcn = fval.user_function_value (); |
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200 |
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201 symbol_scope fcn_scope = fcn->scope (); |
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202 |
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203 fcn_scope.set_parent (this); |
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204 |
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205 if (is_nested) |
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206 { |
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207 m_children.push_back (fcn_scope); |
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208 |
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209 fcn->mark_as_nested_function (); |
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210 |
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211 fcn_scope.mark_nested (); |
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212 } |
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213 } |
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214 |
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215 octave_value |
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216 symbol_scope_rep::find_subfunction (const std::string& name) const |
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217 { |
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218 subfunctions_const_iterator p = m_subfunctions.find (name); |
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219 |
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220 if (p != m_subfunctions.end ()) |
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221 return p->second; |
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222 |
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223 if (m_parent) |
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224 return m_parent->find_subfunction (name); |
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225 |
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226 return octave_value (); |
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227 } |
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228 |
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229 void |
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230 symbol_scope_rep::mark_subfunctions_in_scope_as_private (const std::string& class_name) |
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231 { |
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232 for (auto& nm_sf : m_subfunctions) |
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233 { |
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234 octave_function *fcn = nm_sf.second.function_value (); |
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235 |
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236 if (fcn) |
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237 fcn->mark_as_private_function (class_name); |
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238 } |
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239 } |
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240 |
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241 void |
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242 symbol_scope_rep::set_parent (symbol_scope_rep *p) |
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243 { |
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244 m_parent = p; |
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245 |
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246 if (m_parent) |
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247 { |
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248 // If m_parent is the top-level scope, there will be no parent |
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249 // function. |
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250 |
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251 octave_function *current_fcn = function (); |
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252 |
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253 if (current_fcn && current_fcn->is_anonymous_function ()) |
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254 { |
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255 octave_function *parent_fcn = m_parent->function (); |
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256 |
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257 if (parent_fcn) |
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258 m_parent_fcn = octave_value (parent_fcn, true); |
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259 } |
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260 } |
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261 } |
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262 |
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263 void |
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264 symbol_scope_rep::update_nest (void) |
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265 { |
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266 if (m_parent) |
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267 { |
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268 // fix bad symbol_records |
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269 for (auto& nm_sr : m_symbols) |
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270 { |
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271 symbol_record& ours = nm_sr.second; |
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272 |
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273 if (! ours.is_formal () |
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274 && m_is_nested && m_parent->look_nonlocal (nm_sr.first, ours)) |
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275 { |
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276 if (ours.is_global () || ours.is_persistent ()) |
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277 error ("global and persistent may only be used in the topmost level in which a nested variable is used"); |
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278 } |
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279 } |
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280 |
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281 // The scopes of nested functions are static. |
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282 m_is_static = true; |
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283 } |
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284 else if (m_children.size ()) |
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285 { |
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286 // Parents of nested functions have static scopes. |
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287 m_is_static = true; |
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288 } |
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289 |
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290 for (auto& scope_obj : m_children) |
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291 scope_obj.update_nest (); |
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292 } |
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293 |
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294 bool |
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295 symbol_scope_rep::look_nonlocal (const std::string& name, |
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296 symbol_record& result) |
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297 { |
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298 table_iterator p = m_symbols.find (name); |
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299 if (p == m_symbols.end ()) |
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300 { |
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301 if (m_is_nested && m_parent) |
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302 return m_parent->look_nonlocal (name, result); |
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303 } |
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304 else if (! p->second.is_automatic ()) |
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305 { |
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306 result.bind_fwd_rep (this, p->second); |
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307 return true; |
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308 } |
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309 |
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310 return false; |
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311 } |
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312 |
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313 void |
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314 symbol_scope_rep::bind_script_symbols (symbol_scope_rep *curr_scope) |
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315 { |
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316 for (auto& nm_sr : m_symbols) |
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317 nm_sr.second.bind_fwd_rep (curr_scope, |
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318 curr_scope->find_symbol (nm_sr.first)); |
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319 } |
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320 |
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321 void |
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322 symbol_scope_rep::unbind_script_symbols (void) |
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323 { |
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324 for (auto& nm_sr : m_symbols) |
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325 nm_sr.second.unbind_fwd_rep (); |
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326 } |
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327 } |