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annotate libinterp/parse-tree/pt-decl.h @ 33634:4a70f390c85e default tip @

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maint: Merge stable to default.
author Markus Mützel <markus.muetzel@gmx.de>
date Tue, 28 May 2024 15:25:54 +0200
parents d422992b5483
children
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1 ////////////////////////////////////////////////////////////////////////
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2 //
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3 // Copyright (C) 1996-2024 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_pt_decl_h)
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27 #define octave_pt_decl_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 <list>
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32 #include <string>
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33
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34 #include "oct-lvalue.h"
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35 #include "pt-cmd.h"
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36 #include "pt-id.h"
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37 #include "pt-walk.h"
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38
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39 OCTAVE_BEGIN_NAMESPACE(octave)
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40
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41 class symbol_scope;
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42 class tree_evaluator;
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43 class tree_expression;
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44 class tree_identifier;
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45
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46 // List of expressions that make up a declaration statement.
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47
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48 class tree_decl_elt
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49 {
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50 public:
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51
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52 enum decl_type
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53 {
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54 unknown,
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55 global,
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56 persistent
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57 };
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58
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59 tree_decl_elt (tree_identifier *i, tree_expression *e = nullptr);
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60
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61 OCTAVE_DISABLE_CONSTRUCT_COPY_MOVE (tree_decl_elt)
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62
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63 ~tree_decl_elt ();
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64
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65 filepos beg_pos () const { return m_id->beg_pos (); }
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66 filepos end_pos () const { return m_expr ? m_expr->end_pos () : m_id->end_pos (); }
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67
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68 void mark_as_formal_parameter ()
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69 {
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70 m_id->mark_as_formal_parameter ();
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71 }
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72
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73 bool lvalue_ok () { return m_id->lvalue_ok (); }
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74
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75 octave_lvalue lvalue (tree_evaluator& tw)
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76 {
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77 return m_id->lvalue (tw);
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78 }
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79
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80 void mark_global () { m_type = global; }
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81 bool is_global () const { return m_type == global; }
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82
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83 void mark_persistent () { m_type = persistent; }
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84 bool is_persistent () const { return m_type == persistent; }
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85
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86 tree_identifier * ident () { return m_id; }
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87
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88 std::string name () const { return m_id->name (); }
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89
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90 tree_expression * expression () { return m_expr; }
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91
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92 tree_decl_elt * dup (symbol_scope& scope) const;
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93
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94 void accept (tree_walker& tw)
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95 {
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96 tw.visit_decl_elt (*this);
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97 }
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98
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99 private:
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100
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101 decl_type m_type;
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102
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103 // An identifier to tag with the declared property.
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104 tree_identifier *m_id;
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105
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106 // An initializer expression (may be zero);
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107 tree_expression *m_expr;
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108 };
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109
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110 class tree_decl_init_list : public std::list<tree_decl_elt *>
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111 {
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112 public:
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113
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114 tree_decl_init_list () { }
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115
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116 tree_decl_init_list (tree_decl_elt *t) { push_back (t); }
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117
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118 OCTAVE_DISABLE_COPY_MOVE (tree_decl_init_list)
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119
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120 ~tree_decl_init_list ()
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121 {
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122 while (! empty ())
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123 {
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124 auto p = begin ();
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125 delete *p;
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126 erase (p);
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127 }
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128 }
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129
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130 filepos beg_pos () const
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131 {
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132 if (empty ())
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133 return filepos ();
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134
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135 tree_decl_elt *elt = front ();
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136 return elt->beg_pos ();
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137 }
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138
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139 filepos end_pos () const
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140 {
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141 if (empty ())
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142 return filepos ();
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143
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144 tree_decl_elt *elt = back ();
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145 return elt->end_pos ();
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146 }
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147
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148 void mark_global ()
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149 {
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150 for (tree_decl_elt *elt : *this)
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151 elt->mark_global ();
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152 }
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153
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154 void mark_persistent ()
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155 {
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156 for (tree_decl_elt *elt : *this)
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157 elt->mark_persistent ();
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158 }
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159
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160 std::list<std::string> variable_names () const
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161 {
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162 std::list<std::string> retval;
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163
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164 for (const tree_decl_elt *elt : *this)
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165 {
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166 std::string nm = elt->name ();
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167
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168 if (! nm.empty ())
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169 retval.push_back (nm);
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170 }
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171
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172 return retval;
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173 }
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174
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175 void accept (tree_walker& tw)
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176 {
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177 tw.visit_decl_init_list (*this);
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178 }
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179 };
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180
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181 // Base class for declaration commands -- global, static, etc.
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182
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183 class tree_decl_command : public tree_command
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184 {
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185 public:
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186
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187 tree_decl_command (const std::string& n, const token& tok, tree_decl_init_list *t);
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188
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189 OCTAVE_DISABLE_CONSTRUCT_COPY_MOVE (tree_decl_command)
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190
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191 ~tree_decl_command ();
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192
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193 filepos beg_pos () const { return m_token.beg_pos (); }
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194 filepos end_pos () const { return m_init_list->end_pos (); }
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195
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196 void mark_global ()
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197 {
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198 if (m_init_list)
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199 m_init_list->mark_global ();
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200 }
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201
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202 void mark_persistent ()
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203 {
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204 if (m_init_list)
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205 m_init_list->mark_persistent ();
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206 }
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207
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208 tree_decl_init_list * initializer_list () { return m_init_list; }
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209
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210 std::string name () const { return m_cmd_name; }
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211
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212 void accept (tree_walker& tw)
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213 {
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214 tw.visit_decl_command (*this);
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215 }
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216
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217 private:
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218
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219 // The name of this command -- global, static, etc.
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220 std::string m_cmd_name;
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221
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222 token m_token;
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223
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224 // The list of variables or initializers in this declaration command.
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225 tree_decl_init_list *m_init_list;
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226 };
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227
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228 OCTAVE_END_NAMESPACE(octave)
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229
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230 #endif