Mercurial > octave
annotate libinterp/parse-tree/pt-decl.h @ 23220:092078913d54
maint: Merge stable to default.
author | John W. Eaton <jwe@octave.org> |
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date | Wed, 22 Feb 2017 12:58:07 -0500 |
parents | ef4d915df748 3ac9f9ecfae5 |
children | c452180ab672 |
rev | line source |
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2982 | 1 /* |
2 | |
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3 Copyright (C) 1996-2017 John W. Eaton |
2982 | 4 |
5 This file is part of Octave. | |
6 | |
7 Octave is free software; you can redistribute it and/or modify it | |
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8 under the terms of the GNU General Public License as published by |
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9 the Free Software Foundation; either version 3 of the License, or |
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10 (at your option) any later version. |
2982 | 11 |
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12 Octave is distributed in the hope that it will be useful, but |
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13 WITHOUT ANY WARRANTY; without even the implied warranty of |
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14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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15 GNU General Public License for more details. |
2982 | 16 |
17 You should have received a copy of the GNU General Public License | |
7016 | 18 along with Octave; see the file COPYING. If not, see |
19 <http://www.gnu.org/licenses/>. | |
2982 | 20 |
21 */ | |
22 | |
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23 #if ! defined (octave_pt_decl_h) |
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24 #define octave_pt_decl_h 1 |
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26 #include "octave-config.h" |
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27 |
2982 | 28 #include <string> |
29 | |
4219 | 30 #include "base-list.h" |
6215 | 31 #include "oct-lvalue.h" |
2982 | 32 #include "pt-cmd.h" |
6215 | 33 #include "pt-id.h" |
7336 | 34 #include "symtab.h" |
2982 | 35 |
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36 namespace octave |
2982 | 37 { |
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38 class tree_expression; |
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39 class tree_identifier; |
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40 |
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41 class tree_walker; |
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43 // List of expressions that make up a declaration statement. |
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45 class tree_decl_elt |
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46 { |
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47 public: |
2982 | 48 |
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49 tree_decl_elt (tree_identifier *i = 0, tree_expression *e = 0) |
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50 : id (i), expr (e) { } |
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52 // No copying! |
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54 tree_decl_elt (const tree_decl_elt&) = delete; |
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55 |
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56 tree_decl_elt& operator = (const tree_decl_elt&) = delete; |
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58 ~tree_decl_elt (void); |
6215 | 59 |
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60 bool eval (void); |
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62 bool is_defined (void) { return id ? id->is_defined () : false; } |
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63 |
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64 bool is_variable (void) { return id ? id->is_variable () : false; } |
6215 | 65 |
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66 void mark_as_formal_parameter (void) |
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67 { |
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68 if (id) |
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69 id->mark_as_formal_parameter (); |
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70 } |
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72 bool lvalue_ok (void) { return id ? id->lvalue_ok () : false; } |
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73 |
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74 // Do not allow functions to return null values. |
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75 octave_value rvalue1 (int nargout = 1) |
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76 { |
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77 return id ? id->rvalue1 (nargout).storable_value () : octave_value (); |
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78 } |
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79 |
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80 octave_value_list rvalue (int nargout) |
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81 { |
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82 octave_value_list retval; |
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84 if (nargout > 1) |
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85 error ("invalid number of output arguments in declaration list"); |
2982 | 86 |
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87 retval = rvalue1 (nargout); |
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88 |
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89 return retval; |
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90 } |
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92 octave_lvalue lvalue (void) { return id ? id->lvalue () : octave_lvalue (); } |
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94 tree_identifier *ident (void) { return id; } |
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96 std::string name (void) { return id ? id->name () : ""; } |
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98 tree_expression *expression (void) { return expr; } |
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100 tree_decl_elt *dup (symbol_table::scope_id scope, |
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101 symbol_table::context_id context) const; |
2982 | 102 |
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103 void accept (tree_walker& tw); |
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104 |
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105 private: |
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107 // An identifier to tag with the declared property. |
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108 tree_identifier *id; |
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110 // An initializer expression (may be zero); |
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111 tree_expression *expr; |
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112 }; |
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114 class tree_decl_init_list : public octave::base_list<tree_decl_elt *> |
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115 { |
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116 public: |
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117 |
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118 tree_decl_init_list (void) { } |
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120 tree_decl_init_list (tree_decl_elt *t) { append (t); } |
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122 // No copying! |
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124 tree_decl_init_list (const tree_decl_init_list&) = delete; |
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125 |
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126 tree_decl_init_list& operator = (const tree_decl_init_list&) = delete; |
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128 ~tree_decl_init_list (void) |
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129 { |
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130 while (! empty ()) |
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131 { |
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132 iterator p = begin (); |
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133 delete *p; |
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134 erase (p); |
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135 } |
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136 } |
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138 tree_decl_init_list *dup (symbol_table::scope_id scope, |
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139 symbol_table::context_id context) const; |
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141 void accept (tree_walker& tw); |
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142 }; |
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144 // Base class for declaration commands -- global, static, etc. |
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146 class tree_decl_command : public tree_command |
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147 { |
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148 public: |
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150 tree_decl_command (const std::string& n, int l = -1, int c = -1) |
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151 : tree_command (l, c), cmd_name (n), init_list (0) { } |
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152 |
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153 tree_decl_command (const std::string& n, tree_decl_init_list *t, |
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154 int l = -1, int c = -1) |
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155 : tree_command (l, c), cmd_name (n), init_list (t) { } |
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157 // No copying! |
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159 tree_decl_command (const tree_decl_command&) = delete; |
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160 |
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161 tree_decl_command& operator = (const tree_decl_command&) = delete; |
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163 ~tree_decl_command (void); |
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165 tree_decl_init_list *initializer_list (void) { return init_list; } |
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167 std::string name (void) { return cmd_name; } |
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169 protected: |
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171 // The name of this command -- global, static, etc. |
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172 std::string cmd_name; |
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174 // The list of variables or initializers in this declaration command. |
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175 tree_decl_init_list *init_list; |
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176 }; |
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178 // Global. |
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180 class tree_global_command : public tree_decl_command |
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181 { |
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182 public: |
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184 tree_global_command (int l = -1, int c = -1) |
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185 : tree_decl_command ("global", l, c) { } |
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187 tree_global_command (tree_decl_init_list *t, int l = -1, int c = -1) |
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188 : tree_decl_command ("global", t, l, c) { } |
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190 // No copying! |
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191 |
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192 tree_global_command (const tree_global_command&) = delete; |
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194 tree_global_command& operator = (const tree_global_command&) = delete; |
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195 |
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196 ~tree_global_command (void) = default; |
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198 tree_command *dup (symbol_table::scope_id scope, |
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199 symbol_table::context_id context) const; |
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201 void accept (tree_walker& tw); |
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203 private: |
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205 static void do_init (tree_decl_elt& elt); |
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206 }; |
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207 |
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208 // Persistent. |
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209 |
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210 class tree_persistent_command : public tree_decl_command |
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211 { |
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212 public: |
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214 tree_persistent_command (int l = -1, int c = -1) |
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215 : tree_decl_command ("persistent", l, c) { } |
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217 tree_persistent_command (tree_decl_init_list *t, int l = -1, int c = -1) |
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218 : tree_decl_command ("persistent", t, l, c) { } |
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220 // No copying! |
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222 tree_persistent_command (const tree_persistent_command&) = delete; |
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223 |
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224 tree_persistent_command& operator = (const tree_persistent_command&) = delete; |
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226 ~tree_persistent_command (void) = default; |
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227 |
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228 tree_command *dup (symbol_table::scope_id scope, |
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229 symbol_table::context_id context) const; |
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231 void accept (tree_walker& tw); |
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232 |
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233 private: |
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235 static void do_init (tree_decl_elt& elt); |
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236 }; |
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237 } |
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239 #if defined (OCTAVE_USE_DEPRECATED_FUNCTIONS) |
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241 OCTAVE_DEPRECATED ("use 'octave::tree_decl_elt' instead") |
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242 typedef octave::tree_decl_elt tree_decl_elt; |
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243 |
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244 // tree_decl_init_list is derived from a template. |
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246 OCTAVE_DEPRECATED ("use 'octave::tree_decl_command' instead") |
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247 typedef octave::tree_decl_command tree_decl_command; |
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249 OCTAVE_DEPRECATED ("use 'octave::tree_global_command' instead") |
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250 typedef octave::tree_global_command tree_global_command; |
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252 OCTAVE_DEPRECATED ("use 'octave::tree_persistent_command' instead") |
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253 typedef octave::tree_persistent_command tree_persistent_command; |
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255 #endif | |
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256 |
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257 #endif |