Mercurial > octave
annotate libinterp/corefcn/symrec.h @ 24271:0dd6c909baa2
use shared_ptr and weak_ptr to manage symbol_record object
* symrec.h, symrec.cc (symbol_record::symbol_record_rep::count):
Delete data member and all uses.
(symbol_record::symbol_record_rep::m_fwd_rep): Manage with weak_ptr.
(symbol_record::rep): Manage with shared_ptr.
author | John W. Eaton <jwe@octave.org> |
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date | Fri, 17 Nov 2017 09:12:11 -0500 |
parents | f494b87d2a93 |
children | dd810f9d26e7 |
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 |
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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 (octave_symrec_h) |
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25 #define octave_symrec_h 1 |
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26 |
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27 #include "octave-config.h" |
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28 |
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29 #include <deque> |
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30 #include <list> |
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31 #include <memory> |
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32 #include <string> |
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33 |
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34 class octave_user_function; |
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35 |
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36 #include "ov.h" |
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37 #include "ovl.h" |
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38 |
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39 namespace octave |
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40 { |
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41 class fcn_info; |
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42 class symbol_scope; |
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43 |
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44 class symbol_record |
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45 { |
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46 public: |
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47 |
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48 typedef size_t context_id; |
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49 |
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50 // generic variable |
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51 static const unsigned int local = 1; |
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52 |
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53 // varargin, argn, .nargin., .nargout. |
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54 // (FIXME: is this really used now?) |
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55 static const unsigned int automatic = 2; |
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56 |
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57 // formal parameter |
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58 static const unsigned int formal = 4; |
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59 |
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60 // not listed or cleared (.nargin., .nargout.) |
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61 static const unsigned int hidden = 8; |
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62 |
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63 // inherited from parent scope; not cleared at function exit |
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64 static const unsigned int inherited = 16; |
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65 |
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66 // global (redirects to global scope) |
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67 static const unsigned int global = 32; |
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68 |
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69 // not cleared at function exit |
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70 static const unsigned int persistent = 64; |
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71 |
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72 // this symbol may NOT become a variable. |
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73 // (symbol added to a static workspace) |
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74 static const unsigned int added_static = 128; |
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75 |
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76 private: |
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77 |
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78 class symbol_record_rep |
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79 { |
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80 public: |
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81 |
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82 symbol_record_rep (symbol_scope *s, const std::string& nm, |
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83 const octave_value& v, unsigned int sc) |
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84 : m_decl_scope (s), curr_fcn (nullptr), name (nm), |
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85 m_fwd_rep (), value_stack (), |
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86 storage_class (sc), /* finfo (), */ valid (true) |
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87 { |
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88 value_stack.push_back (v); |
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89 } |
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90 |
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91 // No copying! |
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92 |
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93 symbol_record_rep (const symbol_record_rep& ov) = delete; |
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94 |
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95 symbol_record_rep& operator = (const symbol_record_rep&) = delete; |
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96 |
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97 ~symbol_record_rep (void) = default; |
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98 |
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99 void assign (const octave_value& value) |
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100 { |
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101 if (auto t_fwd_rep = m_fwd_rep.lock ()) |
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102 { |
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103 t_fwd_rep->assign (value); |
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104 return; |
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105 } |
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106 |
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107 varref () = value; |
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108 } |
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109 |
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110 void assign (octave_value::assign_op op, |
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111 const std::string& type, |
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112 const std::list<octave_value_list>& idx, |
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113 const octave_value& value) |
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114 { |
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115 if (auto t_fwd_rep = m_fwd_rep.lock ()) |
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116 { |
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117 t_fwd_rep->assign (op, type, idx, value); |
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118 return; |
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119 } |
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120 |
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121 varref().assign (op, type, idx, value); |
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122 } |
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123 |
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124 void assign (octave_value::assign_op op, const octave_value& value) |
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125 { |
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126 if (auto t_fwd_rep = m_fwd_rep.lock ()) |
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127 { |
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128 t_fwd_rep->assign (op, value); |
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129 return; |
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130 } |
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131 |
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132 varref().assign (op, value); |
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133 } |
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134 |
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135 void do_non_const_unary_op (octave_value::unary_op op) |
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136 { |
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137 if (auto t_fwd_rep = m_fwd_rep.lock ()) |
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138 { |
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139 t_fwd_rep->do_non_const_unary_op (op); |
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140 return; |
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141 } |
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142 |
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143 varref().do_non_const_unary_op (op); |
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144 } |
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145 |
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146 void do_non_const_unary_op (octave_value::unary_op op, |
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147 const std::string& type, |
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148 const std::list<octave_value_list>& idx) |
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149 { |
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150 if (auto t_fwd_rep = m_fwd_rep.lock ()) |
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151 { |
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152 t_fwd_rep->do_non_const_unary_op (op, type, idx); |
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153 return; |
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154 } |
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155 |
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156 varref().do_non_const_unary_op (op, type, idx); |
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157 } |
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158 |
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159 context_id get_decl_scope_context (void) const; |
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160 |
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161 octave_value& varref (void) |
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162 { |
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163 if (auto t_fwd_rep = m_fwd_rep.lock ()) |
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164 return t_fwd_rep->varref (); |
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165 |
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166 context_id context = m_decl_scope ? get_decl_scope_context () : 0; |
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167 |
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168 if (is_global ()) |
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169 return xglobal_varref (); |
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170 else if (is_persistent ()) |
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171 return xpersistent_varref (); |
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172 else |
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173 { |
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174 context_id n = value_stack.size (); |
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175 while (n++ <= context) |
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176 value_stack.push_back (octave_value ()); |
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177 |
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178 return value_stack[context]; |
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179 } |
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180 } |
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181 |
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182 octave_value varval (void) const |
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183 { |
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184 if (auto t_fwd_rep = m_fwd_rep.lock ()) |
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185 return t_fwd_rep->varval (); |
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186 |
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187 context_id context = m_decl_scope ? get_decl_scope_context () : 0; |
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188 |
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189 if (is_global ()) |
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190 return xglobal_varval (); |
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191 else if (is_persistent ()) |
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192 return xpersistent_varval (); |
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193 else |
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194 { |
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195 if (context < value_stack.size ()) |
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196 return value_stack[context]; |
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197 else |
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198 return octave_value (); |
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199 } |
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200 } |
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201 |
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202 void push_context (symbol_scope *sid) |
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203 { |
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204 if (auto t_fwd_rep = m_fwd_rep.lock ()) |
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205 { |
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206 t_fwd_rep->push_context (sid); |
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207 return; |
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208 } |
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209 |
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210 if (! (is_persistent () || is_global ()) |
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211 && sid == decl_scope ()) |
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212 value_stack.push_back (octave_value ()); |
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213 } |
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214 |
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215 // If pop_context returns 0, we are out of values and this element |
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216 // of the symbol table should be deleted. This can happen for |
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217 // functions like |
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218 // |
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219 // function foo (n) |
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220 // if (n > 0) |
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221 // foo (n-1); |
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222 // else |
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223 // eval ("x = 1"); |
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224 // endif |
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225 // endfunction |
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226 // |
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227 // Here, X should only exist in the final stack frame. |
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228 |
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229 size_t pop_context (symbol_scope *sid) |
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230 { |
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231 if (auto t_fwd_rep = m_fwd_rep.lock ()) |
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232 return t_fwd_rep->pop_context (sid); |
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233 |
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234 size_t retval = 1; |
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235 |
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236 if (! (is_persistent () || is_global ()) |
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237 && sid == decl_scope ()) |
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238 { |
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239 value_stack.pop_back (); |
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240 retval = value_stack.size (); |
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241 } |
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242 |
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243 return retval; |
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244 } |
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245 |
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246 void clear (void) |
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247 { |
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248 if (auto t_fwd_rep = m_fwd_rep.lock ()) |
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249 { |
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250 t_fwd_rep->clear (); |
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251 return; |
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252 } |
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253 |
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254 clear (decl_scope ()); |
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255 } |
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256 |
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257 void clear (symbol_scope *sid); |
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258 |
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259 bool is_defined (void) const |
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260 { |
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261 if (auto t_fwd_rep = m_fwd_rep.lock ()) |
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262 return t_fwd_rep->is_defined (); |
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263 |
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264 return varval ().is_defined (); |
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265 } |
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266 |
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267 bool is_valid (void) const |
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268 { |
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269 if (auto t_fwd_rep = m_fwd_rep.lock ()) |
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270 return t_fwd_rep->is_valid (); |
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271 |
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272 return valid; |
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273 } |
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274 |
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275 bool is_variable (void) const |
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276 { |
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277 if (auto t_fwd_rep = m_fwd_rep.lock ()) |
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278 return t_fwd_rep->is_variable (); |
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279 |
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280 return (! is_local () || is_defined ()); |
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281 } |
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282 |
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283 bool is_local (void) const |
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284 { |
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285 if (auto t_fwd_rep = m_fwd_rep.lock ()) |
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286 return t_fwd_rep->is_local (); |
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287 |
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288 return storage_class & local; |
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289 } |
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290 |
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291 bool is_automatic (void) const |
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292 { |
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293 if (auto t_fwd_rep = m_fwd_rep.lock ()) |
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294 return t_fwd_rep->is_automatic (); |
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295 |
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296 return storage_class & automatic; |
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297 } |
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298 |
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299 bool is_formal (void) const |
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300 { |
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301 if (auto t_fwd_rep = m_fwd_rep.lock ()) |
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302 return t_fwd_rep->is_formal (); |
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303 |
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304 return storage_class & formal; |
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305 } |
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306 |
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307 bool is_hidden (void) const |
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308 { |
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309 if (auto t_fwd_rep = m_fwd_rep.lock ()) |
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310 return t_fwd_rep->is_hidden (); |
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311 |
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312 return storage_class & hidden; |
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313 } |
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314 |
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315 bool is_inherited (void) const |
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316 { |
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317 if (auto t_fwd_rep = m_fwd_rep.lock ()) |
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318 return t_fwd_rep->is_inherited (); |
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319 |
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320 return storage_class & inherited; |
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321 } |
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322 |
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323 bool is_global (void) const |
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324 { |
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325 if (auto t_fwd_rep = m_fwd_rep.lock ()) |
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326 return t_fwd_rep->is_global (); |
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327 |
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328 return storage_class & global; |
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329 } |
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330 |
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331 bool is_persistent (void) const |
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332 { |
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333 if (auto t_fwd_rep = m_fwd_rep.lock ()) |
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334 return t_fwd_rep->is_persistent (); |
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335 |
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336 return storage_class & persistent; |
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337 } |
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338 |
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339 bool is_added_static (void) const |
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340 { |
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341 if (auto t_fwd_rep = m_fwd_rep.lock ()) |
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342 return t_fwd_rep->is_added_static (); |
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343 |
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344 return storage_class & added_static; |
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345 } |
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346 |
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347 void mark_local (void) |
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348 { |
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349 if (auto t_fwd_rep = m_fwd_rep.lock ()) |
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350 { |
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351 t_fwd_rep->mark_local (); |
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352 return; |
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353 } |
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354 |
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355 storage_class |= local; |
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356 } |
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357 |
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358 void mark_automatic (void) |
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359 { |
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360 if (auto t_fwd_rep = m_fwd_rep.lock ()) |
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361 { |
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362 t_fwd_rep->mark_automatic (); |
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363 return; |
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364 } |
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365 |
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366 storage_class |= automatic; |
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367 } |
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368 |
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369 void mark_formal (void) |
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370 { |
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371 if (auto t_fwd_rep = m_fwd_rep.lock ()) |
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372 { |
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373 t_fwd_rep->mark_formal (); |
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374 return; |
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375 } |
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376 |
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377 storage_class |= formal; |
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378 } |
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379 |
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380 void mark_hidden (void) |
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381 { |
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382 if (auto t_fwd_rep = m_fwd_rep.lock ()) |
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383 { |
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384 t_fwd_rep->mark_hidden (); |
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385 return; |
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386 } |
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387 |
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388 storage_class |= hidden; |
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389 } |
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390 |
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391 void mark_inherited (void) |
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392 { |
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393 if (auto t_fwd_rep = m_fwd_rep.lock ()) |
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394 { |
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395 t_fwd_rep->mark_inherited (); |
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396 return; |
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397 } |
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398 |
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399 storage_class |= inherited; |
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400 } |
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401 |
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402 void mark_global (void) |
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403 { |
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404 if (auto t_fwd_rep = m_fwd_rep.lock ()) |
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405 { |
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406 t_fwd_rep->mark_global (); |
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407 return; |
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408 } |
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409 |
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410 if (is_persistent ()) |
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411 error ("can't make persistent variable %s global", name.c_str ()); |
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412 |
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413 storage_class |= global; |
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414 } |
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415 |
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416 void mark_persistent (void) |
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417 { |
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418 if (auto t_fwd_rep = m_fwd_rep.lock ()) |
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419 { |
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420 t_fwd_rep->mark_persistent (); |
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421 return; |
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422 } |
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423 |
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424 if (is_global ()) |
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425 error ("can't make global variable %s persistent", name.c_str ()); |
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426 |
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427 storage_class |= persistent; |
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428 } |
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429 |
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430 void mark_added_static (void) |
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431 { |
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432 if (auto t_fwd_rep = m_fwd_rep.lock ()) |
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433 { |
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434 t_fwd_rep->mark_added_static (); |
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435 return; |
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436 } |
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437 |
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438 storage_class |= added_static; |
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439 } |
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440 |
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441 void unmark_local (void) |
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442 { |
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443 if (auto t_fwd_rep = m_fwd_rep.lock ()) |
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444 { |
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445 t_fwd_rep->unmark_local (); |
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446 return; |
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447 } |
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448 |
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449 storage_class &= ~local; |
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450 } |
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451 |
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452 void unmark_automatic (void) |
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453 { |
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454 if (auto t_fwd_rep = m_fwd_rep.lock ()) |
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455 { |
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456 t_fwd_rep->unmark_automatic (); |
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457 return; |
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458 } |
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459 |
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460 storage_class &= ~automatic; |
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461 } |
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462 |
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463 void unmark_formal (void) |
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464 { |
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465 if (auto t_fwd_rep = m_fwd_rep.lock ()) |
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466 { |
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467 t_fwd_rep->unmark_formal (); |
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468 return; |
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469 } |
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470 |
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471 storage_class &= ~formal; |
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472 } |
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473 |
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474 void unmark_hidden (void) |
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475 { |
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476 if (auto t_fwd_rep = m_fwd_rep.lock ()) |
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477 { |
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478 t_fwd_rep->unmark_hidden (); |
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479 return; |
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480 } |
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481 |
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482 storage_class &= ~hidden; |
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483 } |
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484 |
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485 void unmark_inherited (void) |
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486 { |
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487 if (auto t_fwd_rep = m_fwd_rep.lock ()) |
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488 { |
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489 t_fwd_rep->unmark_inherited (); |
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490 return; |
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491 } |
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492 |
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493 storage_class &= ~inherited; |
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494 } |
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495 |
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496 void unmark_global (void) |
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497 { |
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498 if (auto t_fwd_rep = m_fwd_rep.lock ()) |
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499 { |
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500 t_fwd_rep->unmark_global (); |
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501 return; |
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502 } |
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503 |
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504 storage_class &= ~global; |
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505 } |
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506 |
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507 void unmark_persistent (void) |
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508 { |
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509 if (auto t_fwd_rep = m_fwd_rep.lock ()) |
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510 { |
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511 t_fwd_rep->unmark_persistent (); |
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512 return; |
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513 } |
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514 |
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515 storage_class &= ~persistent; |
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516 } |
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517 |
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518 void unmark_added_static (void) |
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519 { |
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520 if (auto t_fwd_rep = m_fwd_rep.lock ()) |
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521 { |
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522 t_fwd_rep->unmark_added_static (); |
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523 return; |
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524 } |
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525 |
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526 storage_class &= ~added_static; |
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527 } |
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528 |
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529 void init_persistent (void); |
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530 |
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531 void invalidate (void) |
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532 { |
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533 if (auto t_fwd_rep = m_fwd_rep.lock ()) |
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534 { |
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535 t_fwd_rep->invalidate (); |
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536 return; |
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537 } |
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538 |
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539 valid = false; |
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540 } |
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541 |
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542 void erase_persistent (void); |
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543 |
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544 symbol_scope *decl_scope (void) |
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545 { |
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546 if (auto t_fwd_rep = m_fwd_rep.lock ()) |
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547 return t_fwd_rep->decl_scope (); |
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548 |
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549 return m_decl_scope; |
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550 } |
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551 |
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552 void set_curr_fcn (octave_user_function *fcn) |
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553 { |
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554 if (auto t_fwd_rep = m_fwd_rep.lock ()) |
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555 { |
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556 t_fwd_rep->set_curr_fcn (fcn); |
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557 return; |
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558 } |
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559 |
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560 curr_fcn = fcn; |
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561 } |
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562 |
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563 // We don't forward more than once, so no need to forward the |
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564 // next two. |
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565 |
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566 void bind_fwd_rep (const std::shared_ptr<symbol_record_rep>& fwd_rep) |
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567 { |
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568 m_fwd_rep = fwd_rep; |
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569 } |
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570 |
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571 void unbind_fwd_rep (void) { m_fwd_rep.reset (); } |
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572 |
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573 symbol_record_rep * dup (symbol_scope *new_scope) const; |
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574 |
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575 octave_value dump (void) const; |
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576 |
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577 symbol_scope *m_decl_scope; |
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578 |
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579 octave_user_function *curr_fcn; |
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580 |
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581 std::string name; |
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582 |
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583 std::weak_ptr<symbol_record_rep> m_fwd_rep; |
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584 |
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585 std::deque<octave_value> value_stack; |
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586 |
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587 unsigned int storage_class; |
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588 |
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589 // fcn_info *finfo; |
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590 |
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591 bool valid; |
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592 |
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593 private: |
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594 |
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595 octave_value& xglobal_varref (void); |
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596 |
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597 octave_value& xpersistent_varref (void); |
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598 |
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599 octave_value xglobal_varval (void) const; |
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600 |
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601 octave_value xpersistent_varval (void) const; |
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602 }; |
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603 |
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604 public: |
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605 |
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606 symbol_record (void); |
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607 |
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608 symbol_record (symbol_scope *s, const std::string& nm = "", |
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609 const octave_value& v = octave_value (), |
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610 unsigned int sc = local) |
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611 : rep (new symbol_record_rep (s, nm, v, sc)) { } |
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612 |
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613 symbol_record (const symbol_record& sr) = default; |
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614 |
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615 symbol_record& operator = (const symbol_record& sr) = default; |
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616 |
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617 ~symbol_record (void) = default; |
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618 |
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619 symbol_record dup (symbol_scope *sid) const |
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620 { |
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621 return symbol_record (rep->dup (sid)); |
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622 } |
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623 |
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624 const std::string& name (void) const { return rep->name; } |
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625 |
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626 void rename (const std::string& new_name) { rep->name = new_name; } |
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627 |
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628 octave_value |
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629 find (const octave_value_list& args = octave_value_list ()) const; |
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630 |
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631 void assign (const octave_value& value) |
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632 { |
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633 rep->assign (value); |
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634 } |
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635 |
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636 void assign (octave_value::assign_op op, |
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637 const std::string& type, |
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638 const std::list<octave_value_list>& idx, |
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639 const octave_value& value) |
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640 { |
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641 rep->assign (op, type, idx, value); |
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642 } |
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643 |
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644 void assign (octave_value::assign_op op, const octave_value& value) |
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645 { |
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646 rep->assign (op, value); |
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647 } |
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648 |
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649 void do_non_const_unary_op (octave_value::unary_op op) |
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650 { |
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651 rep->do_non_const_unary_op (op); |
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652 } |
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653 |
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654 void do_non_const_unary_op (octave_value::unary_op op, |
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655 const std::string& type, |
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656 const std::list<octave_value_list>& idx) |
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657 { |
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658 rep->do_non_const_unary_op (op, type, idx); |
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659 } |
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660 |
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661 // Delete when deprecated varref functions are removed. |
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662 octave_value& varref (void) |
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663 { |
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664 return rep->varref (); |
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665 } |
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666 |
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667 octave_value varval (void) const |
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668 { |
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669 return rep->varval (); |
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670 } |
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671 |
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672 void push_context (symbol_scope *sid) { rep->push_context (sid); } |
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673 |
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674 size_t pop_context (symbol_scope *sid) { return rep->pop_context (sid); } |
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675 |
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676 void clear (void) { rep->clear (); } |
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677 |
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678 void clear (symbol_scope *sid) { rep->clear (sid); } |
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679 |
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680 bool is_defined (void) const |
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681 { |
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682 return rep->is_defined (); |
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683 } |
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684 |
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685 bool is_undefined (void) const |
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686 { |
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687 return ! rep->is_defined (); |
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688 } |
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689 |
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690 bool is_valid (void) const |
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691 { |
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692 return rep->is_valid (); |
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693 } |
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694 |
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695 bool is_variable (void) const |
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696 { |
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697 return rep->is_variable (); |
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698 } |
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699 |
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700 bool is_local (void) const { return rep->is_local (); } |
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701 bool is_automatic (void) const { return rep->is_automatic (); } |
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702 bool is_formal (void) const { return rep->is_formal (); } |
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703 bool is_global (void) const { return rep->is_global (); } |
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704 bool is_hidden (void) const { return rep->is_hidden (); } |
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705 bool is_inherited (void) const { return rep->is_inherited (); } |
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706 bool is_persistent (void) const { return rep->is_persistent (); } |
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707 bool is_added_static (void) const { return rep->is_added_static (); } |
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708 |
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709 void mark_local (void) { rep->mark_local (); } |
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710 void mark_automatic (void) { rep->mark_automatic (); } |
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711 void mark_formal (void) { rep->mark_formal (); } |
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712 void mark_hidden (void) { rep->mark_hidden (); } |
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713 void mark_inherited (void) { rep->mark_inherited (); } |
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714 void mark_global (void) { rep->mark_global (); } |
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715 void mark_persistent (void) { rep->mark_persistent (); } |
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716 void mark_added_static (void) { rep->mark_added_static (); } |
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717 |
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718 void unmark_local (void) { rep->unmark_local (); } |
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719 void unmark_automatic (void) { rep->unmark_automatic (); } |
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720 void unmark_formal (void) { rep->unmark_formal (); } |
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721 void unmark_hidden (void) { rep->unmark_hidden (); } |
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722 void unmark_inherited (void) { rep->unmark_inherited (); } |
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723 void unmark_global (void) { rep->unmark_global (); } |
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724 void unmark_persistent (void) { rep->unmark_persistent (); } |
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725 void unmark_added_static (void) { rep->unmark_added_static (); } |
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726 |
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727 void init_persistent (void) { rep->init_persistent (); } |
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728 |
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729 void erase_persistent (void) { rep->erase_persistent (); } |
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730 |
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731 void invalidate (void) { rep->invalidate (); } |
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732 |
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733 symbol_scope *decl_scope (void) { return rep->decl_scope (); } |
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734 |
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735 unsigned int xstorage_class (void) const { return rep->storage_class; } |
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736 |
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737 void set_curr_fcn (octave_user_function *fcn) |
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738 { |
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739 rep->set_curr_fcn (fcn); |
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740 } |
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741 |
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742 void bind_fwd_rep (const symbol_record& sr) |
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743 { |
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744 rep->bind_fwd_rep (sr.rep); |
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745 } |
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746 |
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747 void unbind_fwd_rep (void) { rep->unbind_fwd_rep (); } |
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748 |
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749 octave_value dump (void) const { return rep->dump (); } |
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750 |
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751 // const symbol_record_rep *xrep (void) const { return rep; } |
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752 |
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753 private: |
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754 |
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755 static octave_value dummy_octave_value; |
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756 |
24271
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757 std::shared_ptr<symbol_record_rep> rep; |
24263
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|
758 |
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759 symbol_record (symbol_record_rep *new_rep) : rep (new_rep) { } |
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760 }; |
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761 } |
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|
762 |
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763 #endif |