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annotate libinterp/corefcn/symrec.h @ 30564:796f54d4ddbf stable

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update Octave Project Developers copyright for the new year In files that have the "Octave Project Developers" copyright notice, update for 2021. In all .txi and .texi files except gpl.txi and gpl.texi in the doc/liboctave and doc/interpreter directories, change the copyright to "Octave Project Developers", the same as used for other source files. Update copyright notices for 2022 (not done since 2019). For gpl.txi and gpl.texi, change the copyright notice to be "Free Software Foundation, Inc." and leave the date at 2007 only because this file only contains the text of the GPL, not anything created by the Octave Project Developers. Add Paul Thomas to contributors.in.
author John W. Eaton <jwe@octave.org>
date Tue, 28 Dec 2021 18:22:40 -0500
parents 7d2c9188d3f3
children 83f9f8bda883
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1 ////////////////////////////////////////////////////////////////////////
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2 //
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3 // Copyright (C) 1993-2022 The Octave Project Developers
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4 //
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5 // See the file COPYRIGHT.md in the top-level directory of this
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6 // distribution or <https://octave.org/copyright/>.
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7 //
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8 // This file is part of Octave.
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9 //
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10 // Octave is free software: you can redistribute it and/or modify it
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11 // under the terms of the GNU General Public License as published by
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12 // the Free Software Foundation, either version 3 of the License, or
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13 // (at your option) any later version.
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14 //
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15 // Octave is distributed in the hope that it will be useful, but
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16 // WITHOUT ANY WARRANTY; without even the implied warranty of
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17 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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18 // GNU General Public License for more details.
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19 //
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20 // You should have received a copy of the GNU General Public License
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21 // along with Octave; see the file COPYING. If not, see
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22 // <https://www.gnu.org/licenses/>.
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23 //
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24 ////////////////////////////////////////////////////////////////////////
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25
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26 #if ! defined (octave_symrec_h)
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27 #define octave_symrec_h 1
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28
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29 #include "octave-config.h"
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30
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31 #include <deque>
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32 #include <list>
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33 #include <memory>
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34 #include <string>
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35
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36 class octave_user_function;
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37
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38 #include "ov.h"
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39 #include "ovl.h"
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40
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41 namespace octave
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42 {
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43 class symbol_scope_rep;
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44
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45 class symbol_record
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46 {
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47 public:
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48
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49 typedef std::size_t context_id;
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50
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51 enum symrec_t : unsigned char
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52 {
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53 // generic variable
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54 LOCAL = 1,
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55 // formal parameter
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56 FORMAL = 2,
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57 // this symbol may NOT become a variable.
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58 // (symbol added to a static workspace)
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59 ADDED_STATIC = 4,
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60 // this symbol was recognized as a variable from syntax
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61 VARIABLE = 8
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62 };
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63
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64 private:
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65
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66 class symbol_record_rep
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67 {
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68 public:
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69
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70 symbol_record_rep (const std::string& nm, symrec_t sc)
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71 : m_frame_offset (0), m_data_offset (0), m_storage_class (sc),
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72 m_name (nm)
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73 { }
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74
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75 symbol_record_rep (const symbol_record_rep&) = default;
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76
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77 symbol_record_rep& operator = (const symbol_record_rep&) = default;
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78
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79 ~symbol_record_rep (void) = default;
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80
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81 // FIXME: use special storage class instead?
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82 bool is_valid (void) const { return ! m_name.empty (); }
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83
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84 void set_frame_offset (std::size_t offset) { m_frame_offset = offset; }
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86 std::size_t frame_offset (void) const { return m_frame_offset; }
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87
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88 void set_data_offset (std::size_t offset) { m_data_offset = offset; }
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90 std::size_t data_offset (void) const { return m_data_offset; }
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91
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92 bool is_local (void) const
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93 {
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94 return m_storage_class & LOCAL;
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95 }
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96
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97 bool is_formal (void) const
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98 {
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99 return m_storage_class & FORMAL;
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100 }
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101
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102 bool is_added_static (void) const
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103 {
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104 return m_storage_class & ADDED_STATIC;
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105 }
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106
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107 bool is_variable (void) const
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108 {
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109 return m_storage_class & VARIABLE;
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110 }
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111
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112 void mark_local (void)
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113 {
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114 m_storage_class = static_cast<symrec_t> (m_storage_class | LOCAL);
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115 }
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116
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117 void mark_formal (void)
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118 {
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119 // Formal parameters are also variables.
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120 m_storage_class = static_cast<symrec_t> (m_storage_class
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121 | FORMAL | VARIABLE);
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122 }
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123
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124 void mark_added_static (void)
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125 {
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126 m_storage_class = static_cast<symrec_t> (m_storage_class
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127 | ADDED_STATIC);
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128 }
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129
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130 void mark_as_variable (void)
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131 {
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132 m_storage_class = static_cast<symrec_t> (m_storage_class | VARIABLE);
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133 }
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134
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135 void unmark_local (void)
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136 {
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137 m_storage_class = static_cast<symrec_t> (m_storage_class & ~LOCAL);
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138 }
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139
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140 void unmark_formal (void)
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141 {
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142 m_storage_class = static_cast<symrec_t> (m_storage_class & ~FORMAL);
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143 }
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144
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145 void unmark_added_static (void)
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146 {
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147 m_storage_class = static_cast<symrec_t> (m_storage_class
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148 & ~ADDED_STATIC);
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149 }
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150
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151 void unmark_as_variable (void)
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152 {
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153 m_storage_class = static_cast<symrec_t> (m_storage_class & ~VARIABLE);
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154 }
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155
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156 unsigned int storage_class (void) const { return m_storage_class; }
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157
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158 std::shared_ptr<symbol_record_rep> dup (void) const;
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159
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160 octave_value dump (void) const;
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161
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162 std::string name (void) const { return m_name; }
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163
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164 void rename (const std::string& new_name) { m_name = new_name; }
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165
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166 private:
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167
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168 std::size_t m_frame_offset;
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169 std::size_t m_data_offset;
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170
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171 symrec_t m_storage_class;
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172
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173 std::string m_name;
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174 };
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175
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176 public:
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177
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178 symbol_record (const std::string& nm = "", symrec_t sc = LOCAL)
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179 : m_rep (new symbol_record_rep (nm, sc))
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180 { }
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181
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182 symbol_record (const std::string& nm, const octave_value&,
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183 symrec_t sc = LOCAL)
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184 : m_rep (new symbol_record_rep (nm, sc))
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185 { }
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186
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187 symbol_record (const symbol_record&) = default;
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188
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189 symbol_record& operator = (const symbol_record&) = default;
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190
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191 ~symbol_record (void) = default;
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192
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193 bool is_valid (void) const { return m_rep->is_valid (); }
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194
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195 explicit operator bool () const { return is_valid (); }
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196
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197 void set_frame_offset (std::size_t offset) { m_rep->set_frame_offset (offset); }
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198
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199 std::size_t frame_offset (void) const { return m_rep->frame_offset (); }
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200
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201 void set_data_offset (std::size_t offset) { m_rep->set_data_offset (offset); }
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202
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203 std::size_t data_offset (void) const { return m_rep->data_offset (); }
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204
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205 symbol_record dup (void) const { return symbol_record (m_rep->dup ()); }
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206
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207 std::string name (void) const { return m_rep->name (); }
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208
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209 void rename (const std::string& new_name) { m_rep->rename (new_name); }
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210
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211 bool is_local (void) const { return m_rep->is_local (); }
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212 bool is_formal (void) const { return m_rep->is_formal (); }
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213 bool is_added_static (void) const { return m_rep->is_added_static (); }
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214 bool is_variable (void) const { return m_rep->is_variable (); }
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215
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216 void mark_local (void) { m_rep->mark_local (); }
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217 void mark_formal (void) { m_rep->mark_formal (); }
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218 void mark_added_static (void) { m_rep->mark_added_static (); }
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219 void mark_as_variable (void) { m_rep->mark_as_variable (); }
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220
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221 void unmark_local (void) { m_rep->unmark_local (); }
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222 void unmark_formal (void) { m_rep->unmark_formal (); }
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223 void unmark_added_static (void) { m_rep->unmark_added_static (); }
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224 void unmark_as_variable (void) { m_rep->unmark_as_variable (); }
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225
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226 unsigned int storage_class (void) const { return m_rep->storage_class (); }
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227
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228 octave_value dump (void) const { return m_rep->dump (); }
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229
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230 private:
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231
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232 std::shared_ptr<symbol_record_rep> m_rep;
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233
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234 // NEW_REP must be dynamically allocated or nullptr.
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235 symbol_record (const std::shared_ptr<symbol_record_rep>& new_rep)
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236 : m_rep (new_rep)
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237 { }
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238 };
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239 }
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240
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241 #endif