Mercurial > hg > octave-nkf
annotate src/pt-decl.h @ 7767:71f068b22fcc
scope and context fixes for function handles
| author | John W. Eaton <jwe@octave.org> |
|---|---|
| date | Wed, 07 May 2008 13:45:30 -0400 |
| parents | 745a8299c2b5 |
| children | 283989f2da9b |
| rev | line source |
|---|---|
| 2982 | 1 /* |
| 2 | |
| 7017 | 3 Copyright (C) 1996, 1997, 2000, 2002, 2004, 2005, 2006, 2007 |
| 4 John W. Eaton | |
| 2982 | 5 |
| 6 This file is part of Octave. | |
| 7 | |
| 8 Octave is free software; you can redistribute it and/or modify it | |
| 9 under the terms of the GNU General Public License as published by the | |
| 7016 | 10 Free Software Foundation; either version 3 of the License, or (at your |
| 11 option) any later version. | |
| 2982 | 12 |
| 13 Octave is distributed in the hope that it will be useful, but WITHOUT | |
| 14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 16 for more details. | |
| 17 | |
| 18 You should have received a copy of the GNU General Public License | |
| 7016 | 19 along with Octave; see the file COPYING. If not, see |
| 20 <http://www.gnu.org/licenses/>. | |
| 2982 | 21 |
| 22 */ | |
| 23 | |
| 24 #if !defined (octave_tree_decl_h) | |
| 25 #define octave_tree_decl_h 1 | |
| 26 | |
| 27 class tree_expression; | |
| 28 class tree_identifier; | |
| 29 | |
| 30 class tree_walker; | |
| 31 | |
| 32 #include <string> | |
| 33 | |
| 4219 | 34 #include "base-list.h" |
| 6215 | 35 #include "oct-lvalue.h" |
| 2982 | 36 #include "pt-cmd.h" |
| 6215 | 37 #include "pt-id.h" |
| 7336 | 38 #include "symtab.h" |
| 2982 | 39 |
| 40 // List of expressions that make up a declaration statement. | |
| 41 | |
| 42 class | |
| 43 tree_decl_elt | |
| 44 { | |
| 45 public: | |
| 46 | |
| 2989 | 47 typedef void (*eval_fcn) (tree_decl_elt &); |
| 2982 | 48 |
| 49 tree_decl_elt (tree_identifier *i = 0, tree_expression *e = 0) | |
| 50 : id (i), expr (e) { } | |
| 51 | |
| 52 ~tree_decl_elt (void); | |
| 53 | |
| 6215 | 54 bool eval (void); |
| 55 | |
| 56 bool is_defined (void) { return id ? id->is_defined () : false; } | |
| 57 | |
| 7336 | 58 bool is_variable (void) { return id ? id->is_variable () : false; } |
| 59 | |
| 6215 | 60 void mark_as_formal_parameter (void) |
| 61 { | |
| 62 if (id) | |
| 63 id->mark_as_formal_parameter (); | |
| 64 } | |
| 65 | |
| 66 bool lvalue_ok (void) { return id ? id->lvalue_ok () : false; } | |
| 67 | |
| 68 octave_value rvalue (void) { return id ? id->rvalue () : octave_value (); } | |
| 69 | |
| 70 octave_value_list rvalue (int nargout) | |
| 71 { | |
| 72 return id ? id->rvalue (nargout) : octave_value_list (); | |
| 73 } | |
| 74 | |
| 75 octave_lvalue lvalue (void) { return id ? id->lvalue () : octave_lvalue (); } | |
| 2982 | 76 |
| 77 tree_identifier *ident (void) { return id; } | |
| 78 | |
| 79 tree_expression *expression (void) { return expr; } | |
| 80 | |
|
7767
71f068b22fcc
scope and context fixes for function handles
John W. Eaton <jwe@octave.org>
parents:
7336
diff
changeset
|
81 tree_decl_elt *dup (symbol_table::scope_id scope, |
|
71f068b22fcc
scope and context fixes for function handles
John W. Eaton <jwe@octave.org>
parents:
7336
diff
changeset
|
82 symbol_table::context_id context); |
| 5861 | 83 |
| 2982 | 84 void accept (tree_walker& tw); |
| 85 | |
| 86 private: | |
| 87 | |
| 88 // An identifier to tag with the declared property. | |
| 89 tree_identifier *id; | |
| 90 | |
| 91 // An initializer expression (may be zero); | |
| 92 tree_expression *expr; | |
| 2988 | 93 |
| 94 // No copying! | |
| 95 | |
| 96 tree_decl_elt (const tree_decl_elt&); | |
| 97 | |
| 98 tree_decl_elt& operator = (const tree_decl_elt&); | |
| 2982 | 99 }; |
| 100 | |
| 101 class | |
| 4219 | 102 tree_decl_init_list : public octave_base_list<tree_decl_elt *> |
| 2982 | 103 { |
| 104 public: | |
| 105 | |
| 4219 | 106 tree_decl_init_list (void) { } |
| 2982 | 107 |
| 4219 | 108 tree_decl_init_list (tree_decl_elt *t) { append (t); } |
| 2982 | 109 |
| 110 ~tree_decl_init_list (void) | |
| 111 { | |
| 4219 | 112 while (! empty ()) |
| 2982 | 113 { |
| 4219 | 114 iterator p = begin (); |
| 115 delete *p; | |
| 116 erase (p); | |
| 2982 | 117 } |
| 118 } | |
| 119 | |
| 2989 | 120 void eval (tree_decl_elt::eval_fcn); |
| 2982 | 121 |
|
7767
71f068b22fcc
scope and context fixes for function handles
John W. Eaton <jwe@octave.org>
parents:
7336
diff
changeset
|
122 tree_decl_init_list *dup (symbol_table::scope_id scope, |
|
71f068b22fcc
scope and context fixes for function handles
John W. Eaton <jwe@octave.org>
parents:
7336
diff
changeset
|
123 symbol_table::context_id context); |
| 5861 | 124 |
| 2982 | 125 void accept (tree_walker& tw); |
| 2988 | 126 |
| 127 private: | |
| 128 | |
| 129 // No copying! | |
| 130 | |
| 131 tree_decl_init_list (const tree_decl_init_list&); | |
| 132 | |
| 133 tree_decl_init_list& operator = (const tree_decl_init_list&); | |
| 2982 | 134 }; |
| 135 | |
| 136 // Base class for declaration commands -- global, static, etc. | |
| 137 | |
| 138 class | |
| 139 tree_decl_command : public tree_command | |
| 140 { | |
| 141 public: | |
| 142 | |
| 3523 | 143 tree_decl_command (const std::string& n, int l = -1, int c = -1) |
| 7336 | 144 : tree_command (l, c), cmd_name (n), init_list (0) { } |
| 2982 | 145 |
| 3523 | 146 tree_decl_command (const std::string& n, tree_decl_init_list *t, |
| 2982 | 147 int l = -1, int c = -1) |
| 7336 | 148 : tree_command (l, c), cmd_name (n), init_list (t) { } |
| 2982 | 149 |
| 150 ~tree_decl_command (void); | |
| 151 | |
| 152 tree_decl_init_list *initializer_list (void) { return init_list; } | |
| 153 | |
| 154 void accept (tree_walker& tw); | |
| 155 | |
| 3523 | 156 std::string name (void) { return cmd_name; } |
| 2982 | 157 |
| 158 protected: | |
| 159 | |
| 160 // The name of this command -- global, static, etc. | |
| 3523 | 161 std::string cmd_name; |
| 2982 | 162 |
| 163 // The list of variables or initializers in this declaration command. | |
| 164 tree_decl_init_list *init_list; | |
| 2988 | 165 |
| 166 private: | |
| 167 | |
| 168 // No copying! | |
| 169 | |
| 170 tree_decl_command (const tree_decl_command&); | |
| 171 | |
| 172 tree_decl_command& operator = (const tree_decl_command&); | |
| 2982 | 173 }; |
| 174 | |
| 175 // Global. | |
| 176 | |
| 177 class | |
| 178 tree_global_command : public tree_decl_command | |
| 179 { | |
| 180 public: | |
| 181 | |
| 182 tree_global_command (int l = -1, int c = -1) | |
| 183 : tree_decl_command ("global", l, c) { } | |
| 184 | |
| 185 tree_global_command (tree_decl_init_list *t, int l = -1, int c = -1) | |
| 186 : tree_decl_command ("global", t, l, c) { } | |
| 187 | |
| 188 ~tree_global_command (void) { } | |
| 189 | |
| 190 void eval (void); | |
| 2988 | 191 |
|
7767
71f068b22fcc
scope and context fixes for function handles
John W. Eaton <jwe@octave.org>
parents:
7336
diff
changeset
|
192 tree_command *dup (symbol_table::scope_id scope, |
|
71f068b22fcc
scope and context fixes for function handles
John W. Eaton <jwe@octave.org>
parents:
7336
diff
changeset
|
193 symbol_table::context_id context); |
| 5861 | 194 |
| 2988 | 195 private: |
| 196 | |
| 2989 | 197 static void do_init (tree_decl_elt& elt); |
| 198 | |
| 2988 | 199 // No copying! |
| 200 | |
| 201 tree_global_command (const tree_global_command&); | |
| 202 | |
| 203 tree_global_command& operator = (const tree_global_command&); | |
| 2982 | 204 }; |
| 205 | |
| 206 // Static. | |
| 207 | |
| 208 class | |
| 209 tree_static_command : public tree_decl_command | |
| 210 { | |
| 211 public: | |
| 212 | |
| 213 tree_static_command (int l = -1, int c = -1) | |
| 214 : tree_decl_command ("static", l, c) { } | |
| 215 | |
| 216 tree_static_command (tree_decl_init_list *t, int l = -1, int c = -1) | |
| 217 : tree_decl_command ("static", t, l, c) { } | |
| 218 | |
| 219 ~tree_static_command (void) { } | |
| 220 | |
| 221 void eval (void); | |
| 2988 | 222 |
|
7767
71f068b22fcc
scope and context fixes for function handles
John W. Eaton <jwe@octave.org>
parents:
7336
diff
changeset
|
223 tree_command *dup (symbol_table::scope_id scope, |
|
71f068b22fcc
scope and context fixes for function handles
John W. Eaton <jwe@octave.org>
parents:
7336
diff
changeset
|
224 symbol_table::context_id context); |
| 5861 | 225 |
| 2988 | 226 private: |
| 227 | |
| 2989 | 228 static void do_init (tree_decl_elt& elt); |
| 229 | |
| 2988 | 230 // No copying! |
| 231 | |
| 232 tree_static_command (const tree_static_command&); | |
| 233 | |
| 234 tree_static_command& operator = (const tree_static_command&); | |
| 2982 | 235 }; |
| 236 | |
| 237 #endif | |
| 238 | |
| 239 /* | |
| 240 ;;; Local Variables: *** | |
| 241 ;;; mode: C++ *** | |
| 242 ;;; End: *** | |
| 243 */ |