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annotate src/pt-decl.h @ 8920:eb63fbe60fab
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| author | John W. Eaton <jwe@octave.org> |
|---|---|
| date | Sat, 07 Mar 2009 10:41:27 -0500 |
| parents | 35cd375d4bb3 |
| children | cd96d29c5efa |
| rev | line source |
|---|---|
| 2982 | 1 /* |
| 2 | |
| 8920 | 3 Copyright (C) 1996, 1997, 2000, 2002, 2004, 2005, 2006, 2007, 2008, 2009 |
| 7017 | 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 | |
| 47 tree_decl_elt (tree_identifier *i = 0, tree_expression *e = 0) | |
| 48 : id (i), expr (e) { } | |
| 49 | |
| 50 ~tree_decl_elt (void); | |
| 51 | |
| 6215 | 52 bool eval (void); |
| 53 | |
| 54 bool is_defined (void) { return id ? id->is_defined () : false; } | |
| 55 | |
| 7336 | 56 bool is_variable (void) { return id ? id->is_variable () : false; } |
| 57 | |
| 6215 | 58 void mark_as_formal_parameter (void) |
| 59 { | |
| 60 if (id) | |
| 61 id->mark_as_formal_parameter (); | |
| 62 } | |
| 63 | |
| 64 bool lvalue_ok (void) { return id ? id->lvalue_ok () : false; } | |
| 65 | |
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66 // Do not allow functions to return null values. |
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67 octave_value rvalue1 (int nargout = 1) |
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68 { |
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69 return id ? id->rvalue1 (nargout).storable_value () : octave_value (); |
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70 } |
| 6215 | 71 |
| 72 octave_value_list rvalue (int nargout) | |
| 73 { | |
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74 octave_value_list retval; |
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75 |
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76 if (nargout > 1) |
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77 error ("invalid number of output arguments in declaration list"); |
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78 else |
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79 retval = rvalue1 (nargout); |
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80 |
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81 return retval; |
| 6215 | 82 } |
| 83 | |
| 84 octave_lvalue lvalue (void) { return id ? id->lvalue () : octave_lvalue (); } | |
| 2982 | 85 |
| 86 tree_identifier *ident (void) { return id; } | |
| 87 | |
| 88 tree_expression *expression (void) { return expr; } | |
| 89 | |
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90 tree_decl_elt *dup (symbol_table::scope_id scope, |
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91 symbol_table::context_id context) const; |
| 5861 | 92 |
| 2982 | 93 void accept (tree_walker& tw); |
| 94 | |
| 95 private: | |
| 96 | |
| 97 // An identifier to tag with the declared property. | |
| 98 tree_identifier *id; | |
| 99 | |
| 100 // An initializer expression (may be zero); | |
| 101 tree_expression *expr; | |
| 2988 | 102 |
| 103 // No copying! | |
| 104 | |
| 105 tree_decl_elt (const tree_decl_elt&); | |
| 106 | |
| 107 tree_decl_elt& operator = (const tree_decl_elt&); | |
| 2982 | 108 }; |
| 109 | |
| 110 class | |
| 4219 | 111 tree_decl_init_list : public octave_base_list<tree_decl_elt *> |
| 2982 | 112 { |
| 113 public: | |
| 114 | |
| 4219 | 115 tree_decl_init_list (void) { } |
| 2982 | 116 |
| 4219 | 117 tree_decl_init_list (tree_decl_elt *t) { append (t); } |
| 2982 | 118 |
| 119 ~tree_decl_init_list (void) | |
| 120 { | |
| 4219 | 121 while (! empty ()) |
| 2982 | 122 { |
| 4219 | 123 iterator p = begin (); |
| 124 delete *p; | |
| 125 erase (p); | |
| 2982 | 126 } |
| 127 } | |
| 128 | |
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129 tree_decl_init_list *dup (symbol_table::scope_id scope, |
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130 symbol_table::context_id context) const; |
| 5861 | 131 |
| 2982 | 132 void accept (tree_walker& tw); |
| 2988 | 133 |
| 134 private: | |
| 135 | |
| 136 // No copying! | |
| 137 | |
| 138 tree_decl_init_list (const tree_decl_init_list&); | |
| 139 | |
| 140 tree_decl_init_list& operator = (const tree_decl_init_list&); | |
| 2982 | 141 }; |
| 142 | |
| 143 // Base class for declaration commands -- global, static, etc. | |
| 144 | |
| 145 class | |
| 146 tree_decl_command : public tree_command | |
| 147 { | |
| 148 public: | |
| 149 | |
| 3523 | 150 tree_decl_command (const std::string& n, int l = -1, int c = -1) |
| 7336 | 151 : tree_command (l, c), cmd_name (n), init_list (0) { } |
| 2982 | 152 |
| 3523 | 153 tree_decl_command (const std::string& n, tree_decl_init_list *t, |
| 2982 | 154 int l = -1, int c = -1) |
| 7336 | 155 : tree_command (l, c), cmd_name (n), init_list (t) { } |
| 2982 | 156 |
| 157 ~tree_decl_command (void); | |
| 158 | |
| 159 tree_decl_init_list *initializer_list (void) { return init_list; } | |
| 160 | |
| 3523 | 161 std::string name (void) { return cmd_name; } |
| 2982 | 162 |
| 163 protected: | |
| 164 | |
| 165 // The name of this command -- global, static, etc. | |
| 3523 | 166 std::string cmd_name; |
| 2982 | 167 |
| 168 // The list of variables or initializers in this declaration command. | |
| 169 tree_decl_init_list *init_list; | |
| 2988 | 170 |
| 171 private: | |
| 172 | |
| 173 // No copying! | |
| 174 | |
| 175 tree_decl_command (const tree_decl_command&); | |
| 176 | |
| 177 tree_decl_command& operator = (const tree_decl_command&); | |
| 2982 | 178 }; |
| 179 | |
| 180 // Global. | |
| 181 | |
| 182 class | |
| 183 tree_global_command : public tree_decl_command | |
| 184 { | |
| 185 public: | |
| 186 | |
| 187 tree_global_command (int l = -1, int c = -1) | |
| 188 : tree_decl_command ("global", l, c) { } | |
| 189 | |
| 190 tree_global_command (tree_decl_init_list *t, int l = -1, int c = -1) | |
| 191 : tree_decl_command ("global", t, l, c) { } | |
| 192 | |
| 193 ~tree_global_command (void) { } | |
| 194 | |
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195 tree_command *dup (symbol_table::scope_id scope, |
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196 symbol_table::context_id context) const; |
| 5861 | 197 |
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198 void accept (tree_walker& tw); |
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199 |
| 2988 | 200 private: |
| 201 | |
| 2989 | 202 static void do_init (tree_decl_elt& elt); |
| 203 | |
| 2988 | 204 // No copying! |
| 205 | |
| 206 tree_global_command (const tree_global_command&); | |
| 207 | |
| 208 tree_global_command& operator = (const tree_global_command&); | |
| 2982 | 209 }; |
| 210 | |
| 211 // Static. | |
| 212 | |
| 213 class | |
| 214 tree_static_command : public tree_decl_command | |
| 215 { | |
| 216 public: | |
| 217 | |
| 218 tree_static_command (int l = -1, int c = -1) | |
| 219 : tree_decl_command ("static", l, c) { } | |
| 220 | |
| 221 tree_static_command (tree_decl_init_list *t, int l = -1, int c = -1) | |
| 222 : tree_decl_command ("static", t, l, c) { } | |
| 223 | |
| 224 ~tree_static_command (void) { } | |
| 225 | |
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226 tree_command *dup (symbol_table::scope_id scope, |
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227 symbol_table::context_id context) const; |
| 5861 | 228 |
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229 void accept (tree_walker& tw); |
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230 |
| 2988 | 231 private: |
| 232 | |
| 2989 | 233 static void do_init (tree_decl_elt& elt); |
| 234 | |
| 2988 | 235 // No copying! |
| 236 | |
| 237 tree_static_command (const tree_static_command&); | |
| 238 | |
| 239 tree_static_command& operator = (const tree_static_command&); | |
| 2982 | 240 }; |
| 241 | |
| 242 #endif | |
| 243 | |
| 244 /* | |
| 245 ;;; Local Variables: *** | |
| 246 ;;; mode: C++ *** | |
| 247 ;;; End: *** | |
| 248 */ |