Mercurial > octave-nkf
annotate src/pt-decl.h @ 16088:b29b10fbb744 stable release-3-6-4
Version 3.6.4 released.
* configure.ac (AC_INIT): Version is now 3.6.4.
(OCTAVE_RELEASE_DATE): Now 2013-02-21.
| author | John W. Eaton <jwe@octave.org> |
|---|---|
| date | Thu, 21 Feb 2013 15:17:54 -0500 |
| parents | 72c96de7a403 |
| children | 9e3983c8963c |
| rev | line source |
|---|---|
| 2982 | 1 /* |
| 2 | |
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3 Copyright (C) 1996-2012 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 | |
| 8 under the terms of the GNU General Public License as published by the | |
| 7016 | 9 Free Software Foundation; either version 3 of the License, or (at your |
| 10 option) any later version. | |
| 2982 | 11 |
| 12 Octave is distributed in the hope that it will be useful, but WITHOUT | |
| 13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 15 for more details. | |
| 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 | |
| 23 #if !defined (octave_tree_decl_h) | |
| 24 #define octave_tree_decl_h 1 | |
| 25 | |
| 26 class tree_expression; | |
| 27 class tree_identifier; | |
| 28 | |
| 29 class tree_walker; | |
| 30 | |
| 31 #include <string> | |
| 32 | |
| 4219 | 33 #include "base-list.h" |
| 6215 | 34 #include "oct-lvalue.h" |
| 2982 | 35 #include "pt-cmd.h" |
| 6215 | 36 #include "pt-id.h" |
| 7336 | 37 #include "symtab.h" |
| 2982 | 38 |
| 39 // List of expressions that make up a declaration statement. | |
| 40 | |
| 41 class | |
| 42 tree_decl_elt | |
| 43 { | |
| 44 public: | |
| 45 | |
| 46 tree_decl_elt (tree_identifier *i = 0, tree_expression *e = 0) | |
| 47 : id (i), expr (e) { } | |
| 48 | |
| 49 ~tree_decl_elt (void); | |
| 50 | |
| 6215 | 51 bool eval (void); |
| 52 | |
| 53 bool is_defined (void) { return id ? id->is_defined () : false; } | |
| 54 | |
| 7336 | 55 bool is_variable (void) { return id ? id->is_variable () : false; } |
| 56 | |
| 6215 | 57 void mark_as_formal_parameter (void) |
| 58 { | |
| 59 if (id) | |
| 60 id->mark_as_formal_parameter (); | |
| 61 } | |
| 62 | |
| 63 bool lvalue_ok (void) { return id ? id->lvalue_ok () : false; } | |
| 64 | |
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65 // Do not allow functions to return null values. |
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66 octave_value rvalue1 (int nargout = 1) |
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67 { |
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68 return id ? id->rvalue1 (nargout).storable_value () : octave_value (); |
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69 } |
| 6215 | 70 |
| 71 octave_value_list rvalue (int nargout) | |
| 72 { | |
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73 octave_value_list retval; |
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74 |
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75 if (nargout > 1) |
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76 error ("invalid number of output arguments in declaration list"); |
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77 else |
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78 retval = rvalue1 (nargout); |
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79 |
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80 return retval; |
| 6215 | 81 } |
| 82 | |
| 83 octave_lvalue lvalue (void) { return id ? id->lvalue () : octave_lvalue (); } | |
| 2982 | 84 |
| 85 tree_identifier *ident (void) { return id; } | |
| 86 | |
| 87 tree_expression *expression (void) { return expr; } | |
| 88 | |
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89 tree_decl_elt *dup (symbol_table::scope_id scope, |
| 10313 | 90 symbol_table::context_id context) const; |
| 5861 | 91 |
| 2982 | 92 void accept (tree_walker& tw); |
| 93 | |
| 94 private: | |
| 95 | |
| 96 // An identifier to tag with the declared property. | |
| 97 tree_identifier *id; | |
| 98 | |
| 99 // An initializer expression (may be zero); | |
| 100 tree_expression *expr; | |
| 2988 | 101 |
| 102 // No copying! | |
| 103 | |
| 104 tree_decl_elt (const tree_decl_elt&); | |
| 105 | |
| 106 tree_decl_elt& operator = (const tree_decl_elt&); | |
| 2982 | 107 }; |
| 108 | |
| 109 class | |
| 4219 | 110 tree_decl_init_list : public octave_base_list<tree_decl_elt *> |
| 2982 | 111 { |
| 112 public: | |
| 113 | |
| 4219 | 114 tree_decl_init_list (void) { } |
| 2982 | 115 |
| 4219 | 116 tree_decl_init_list (tree_decl_elt *t) { append (t); } |
| 2982 | 117 |
| 118 ~tree_decl_init_list (void) | |
| 119 { | |
| 4219 | 120 while (! empty ()) |
| 10313 | 121 { |
| 122 iterator p = begin (); | |
| 123 delete *p; | |
| 124 erase (p); | |
| 125 } | |
| 2982 | 126 } |
| 127 | |
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128 tree_decl_init_list *dup (symbol_table::scope_id scope, |
| 10313 | 129 symbol_table::context_id context) const; |
| 5861 | 130 |
| 2982 | 131 void accept (tree_walker& tw); |
| 2988 | 132 |
| 133 private: | |
| 134 | |
| 135 // No copying! | |
| 136 | |
| 137 tree_decl_init_list (const tree_decl_init_list&); | |
| 138 | |
| 139 tree_decl_init_list& operator = (const tree_decl_init_list&); | |
| 2982 | 140 }; |
| 141 | |
| 142 // Base class for declaration commands -- global, static, etc. | |
| 143 | |
| 144 class | |
| 145 tree_decl_command : public tree_command | |
| 146 { | |
| 147 public: | |
| 148 | |
| 3523 | 149 tree_decl_command (const std::string& n, int l = -1, int c = -1) |
| 7336 | 150 : tree_command (l, c), cmd_name (n), init_list (0) { } |
| 2982 | 151 |
| 3523 | 152 tree_decl_command (const std::string& n, tree_decl_init_list *t, |
| 10313 | 153 int l = -1, int c = -1) |
| 7336 | 154 : tree_command (l, c), cmd_name (n), init_list (t) { } |
| 2982 | 155 |
| 156 ~tree_decl_command (void); | |
| 157 | |
| 158 tree_decl_init_list *initializer_list (void) { return init_list; } | |
| 159 | |
| 3523 | 160 std::string name (void) { return cmd_name; } |
| 2982 | 161 |
| 162 protected: | |
| 163 | |
| 164 // The name of this command -- global, static, etc. | |
| 3523 | 165 std::string cmd_name; |
| 2982 | 166 |
| 167 // The list of variables or initializers in this declaration command. | |
| 168 tree_decl_init_list *init_list; | |
| 2988 | 169 |
| 170 private: | |
| 171 | |
| 172 // No copying! | |
| 173 | |
| 174 tree_decl_command (const tree_decl_command&); | |
| 175 | |
| 176 tree_decl_command& operator = (const tree_decl_command&); | |
| 2982 | 177 }; |
| 178 | |
| 179 // Global. | |
| 180 | |
| 181 class | |
| 182 tree_global_command : public tree_decl_command | |
| 183 { | |
| 184 public: | |
| 185 | |
| 186 tree_global_command (int l = -1, int c = -1) | |
| 187 : tree_decl_command ("global", l, c) { } | |
| 188 | |
| 189 tree_global_command (tree_decl_init_list *t, int l = -1, int c = -1) | |
| 190 : tree_decl_command ("global", t, l, c) { } | |
| 191 | |
| 192 ~tree_global_command (void) { } | |
| 193 | |
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194 tree_command *dup (symbol_table::scope_id scope, |
| 10313 | 195 symbol_table::context_id context) const; |
| 5861 | 196 |
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197 void accept (tree_walker& tw); |
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198 |
| 2988 | 199 private: |
| 200 | |
| 2989 | 201 static void do_init (tree_decl_elt& elt); |
| 202 | |
| 2988 | 203 // No copying! |
| 204 | |
| 205 tree_global_command (const tree_global_command&); | |
| 206 | |
| 207 tree_global_command& operator = (const tree_global_command&); | |
| 2982 | 208 }; |
| 209 | |
| 210 // Static. | |
| 211 | |
| 212 class | |
| 213 tree_static_command : public tree_decl_command | |
| 214 { | |
| 215 public: | |
| 216 | |
| 217 tree_static_command (int l = -1, int c = -1) | |
| 218 : tree_decl_command ("static", l, c) { } | |
| 219 | |
| 220 tree_static_command (tree_decl_init_list *t, int l = -1, int c = -1) | |
| 221 : tree_decl_command ("static", t, l, c) { } | |
| 222 | |
| 223 ~tree_static_command (void) { } | |
| 224 | |
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225 tree_command *dup (symbol_table::scope_id scope, |
| 10313 | 226 symbol_table::context_id context) const; |
| 5861 | 227 |
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228 void accept (tree_walker& tw); |
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229 |
| 2988 | 230 private: |
| 231 | |
| 2989 | 232 static void do_init (tree_decl_elt& elt); |
| 233 | |
| 2988 | 234 // No copying! |
| 235 | |
| 236 tree_static_command (const tree_static_command&); | |
| 237 | |
| 238 tree_static_command& operator = (const tree_static_command&); | |
| 2982 | 239 }; |
| 240 | |
| 241 #endif |