Mercurial > hg > octave-lyh
annotate src/pt-decl.cc @ 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 | 3100283874d7 |
| rev | line source |
|---|---|
| 2982 | 1 /* |
| 2 | |
| 7017 | 3 Copyright (C) 1996, 1997, 1998, 1999, 2000, 2002, 2003, 2004, 2005, |
| 4 2006, 2007 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 #ifdef HAVE_CONFIG_H | |
| 25 #include <config.h> | |
| 26 #endif | |
| 27 | |
| 3156 | 28 #include "defun.h" |
| 2982 | 29 #include "error.h" |
| 30 #include "pt-cmd.h" | |
| 31 #include "ov.h" | |
| 32 #include "oct-lvalue.h" | |
| 7205 | 33 #include "pt-bp.h" |
| 2982 | 34 #include "pt-decl.h" |
| 35 #include "pt-exp.h" | |
| 36 #include "pt-id.h" | |
| 37 #include "pt-walk.h" | |
| 3156 | 38 #include "utils.h" |
| 39 #include "variables.h" | |
| 40 | |
| 2982 | 41 // Declarations (global, static, etc.). |
| 42 | |
| 43 tree_decl_elt::~tree_decl_elt (void) | |
| 44 { | |
| 45 delete id; | |
| 46 delete expr; | |
| 47 } | |
| 48 | |
| 6215 | 49 bool |
| 50 tree_decl_elt::eval (void) | |
| 51 { | |
| 52 bool retval = false; | |
| 53 | |
| 54 if (id && expr) | |
| 55 { | |
| 56 octave_lvalue ult = id->lvalue (); | |
| 57 | |
| 58 octave_value init_val = expr->rvalue (); | |
| 59 | |
| 60 if (! error_state) | |
| 61 { | |
| 62 ult.assign (octave_value::op_asn_eq, init_val); | |
| 63 | |
| 64 retval = true; | |
| 65 } | |
| 66 } | |
| 67 | |
| 68 return retval; | |
| 69 } | |
| 70 | |
| 5861 | 71 tree_decl_elt * |
|
7767
71f068b22fcc
scope and context fixes for function handles
John W. Eaton <jwe@octave.org>
parents:
7336
diff
changeset
|
72 tree_decl_elt::dup (symbol_table::scope_id scope, |
|
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scope and context fixes for function handles
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parents:
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diff
changeset
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73 symbol_table::context_id context) |
| 5861 | 74 { |
|
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scope and context fixes for function handles
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parents:
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diff
changeset
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75 return new tree_decl_elt (id ? id->dup (scope, context) : 0, |
|
71f068b22fcc
scope and context fixes for function handles
John W. Eaton <jwe@octave.org>
parents:
7336
diff
changeset
|
76 expr ? expr->dup (scope, context) : 0); |
| 5861 | 77 } |
| 78 | |
| 2982 | 79 void |
| 80 tree_decl_elt::accept (tree_walker& tw) | |
| 81 { | |
| 82 tw.visit_decl_elt (*this); | |
| 83 } | |
| 84 | |
| 85 // Initializer lists for declaration statements. | |
| 86 | |
| 87 void | |
| 2989 | 88 tree_decl_init_list::eval (tree_decl_elt::eval_fcn f) |
| 2982 | 89 { |
| 4219 | 90 for (iterator p = begin (); p != end (); p++) |
| 2982 | 91 { |
| 4219 | 92 tree_decl_elt *elt = *p; |
| 93 | |
| 94 f (*elt); | |
| 2982 | 95 |
| 96 if (error_state) | |
| 97 break; | |
| 98 } | |
| 99 } | |
| 100 | |
| 5861 | 101 tree_decl_init_list * |
|
7767
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scope and context fixes for function handles
John W. Eaton <jwe@octave.org>
parents:
7336
diff
changeset
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102 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
|
103 symbol_table::context_id context) |
| 5861 | 104 { |
| 105 tree_decl_init_list *new_dil = new tree_decl_init_list (); | |
| 106 | |
| 107 for (iterator p = begin (); p != end (); p++) | |
| 108 { | |
| 109 tree_decl_elt *elt = *p; | |
| 110 | |
|
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scope and context fixes for function handles
John W. Eaton <jwe@octave.org>
parents:
7336
diff
changeset
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111 new_dil->append (elt ? elt->dup (scope, context) : 0); |
| 5861 | 112 } |
| 113 | |
| 114 return new_dil; | |
| 115 } | |
| 116 | |
| 2982 | 117 void |
| 118 tree_decl_init_list::accept (tree_walker& tw) | |
| 119 { | |
| 120 tw.visit_decl_init_list (*this); | |
| 121 } | |
| 122 | |
| 123 // Base class for declaration commands (global, static). | |
| 124 | |
| 125 tree_decl_command::~tree_decl_command (void) | |
| 126 { | |
| 127 delete init_list; | |
| 128 } | |
| 129 | |
| 130 void | |
| 131 tree_decl_command::accept (tree_walker& tw) | |
| 132 { | |
| 133 tw.visit_decl_command (*this); | |
| 134 } | |
| 135 | |
| 136 // Global. | |
| 137 | |
| 2989 | 138 void |
| 139 tree_global_command::do_init (tree_decl_elt& elt) | |
| 2982 | 140 { |
| 141 tree_identifier *id = elt.ident (); | |
| 142 | |
| 143 if (id) | |
| 144 { | |
| 7336 | 145 id->mark_global (); |
| 2982 | 146 |
| 4009 | 147 if (! error_state) |
| 148 { | |
| 149 octave_lvalue ult = id->lvalue (); | |
| 2982 | 150 |
| 4009 | 151 if (ult.is_undefined ()) |
| 152 { | |
| 153 tree_expression *expr = elt.expression (); | |
| 2982 | 154 |
| 4009 | 155 octave_value init_val; |
| 3157 | 156 |
| 4009 | 157 if (expr) |
| 158 init_val = expr->rvalue (); | |
| 4464 | 159 else |
| 160 init_val = Matrix (); | |
| 2982 | 161 |
| 4009 | 162 ult.assign (octave_value::op_asn_eq, init_val); |
| 163 } | |
| 2982 | 164 } |
| 165 } | |
| 166 } | |
| 167 | |
| 168 void | |
| 169 tree_global_command::eval (void) | |
| 170 { | |
| 7205 | 171 MAYBE_DO_BREAKPOINT; |
| 172 | |
| 2982 | 173 if (init_list) |
| 7336 | 174 init_list->eval (do_init); |
| 2982 | 175 |
| 3965 | 176 if (error_state) |
| 2982 | 177 ::error ("evaluating global command near line %d, column %d", |
| 178 line (), column ()); | |
| 179 } | |
| 180 | |
| 5861 | 181 tree_command * |
|
7767
71f068b22fcc
scope and context fixes for function handles
John W. Eaton <jwe@octave.org>
parents:
7336
diff
changeset
|
182 tree_global_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
|
183 symbol_table::context_id context) |
| 5861 | 184 { |
|
7767
71f068b22fcc
scope and context fixes for function handles
John W. Eaton <jwe@octave.org>
parents:
7336
diff
changeset
|
185 return |
|
71f068b22fcc
scope and context fixes for function handles
John W. Eaton <jwe@octave.org>
parents:
7336
diff
changeset
|
186 new tree_global_command (init_list ? init_list->dup (scope, context) : 0, |
|
71f068b22fcc
scope and context fixes for function handles
John W. Eaton <jwe@octave.org>
parents:
7336
diff
changeset
|
187 line (), column ()); |
| 5861 | 188 } |
| 189 | |
| 2982 | 190 // Static. |
| 191 | |
| 2989 | 192 void |
| 193 tree_static_command::do_init (tree_decl_elt& elt) | |
| 2982 | 194 { |
| 195 tree_identifier *id = elt.ident (); | |
| 196 | |
| 197 if (id) | |
| 198 { | |
| 199 id->mark_as_static (); | |
| 200 | |
| 4844 | 201 octave_lvalue ult = id->lvalue (); |
| 2982 | 202 |
| 4846 | 203 if (ult.is_undefined ()) |
| 2982 | 204 { |
| 4844 | 205 tree_expression *expr = elt.expression (); |
| 206 | |
| 207 octave_value init_val; | |
| 2982 | 208 |
| 4844 | 209 if (expr) |
| 210 init_val = expr->rvalue (); | |
| 211 else | |
| 212 init_val = Matrix (); | |
| 2982 | 213 |
| 3538 | 214 ult.assign (octave_value::op_asn_eq, init_val); |
| 2982 | 215 } |
| 216 } | |
| 217 } | |
| 218 | |
| 219 void | |
| 220 tree_static_command::eval (void) | |
| 221 { | |
| 7205 | 222 MAYBE_DO_BREAKPOINT; |
| 223 | |
| 2982 | 224 // Static variables only need to be marked and initialized once. |
| 225 | |
| 7336 | 226 if (init_list) |
| 227 init_list->eval (do_init); | |
| 2982 | 228 |
| 7336 | 229 if (error_state) |
| 230 ::error ("evaluating static command near line %d, column %d", | |
| 231 line (), column ()); | |
| 2982 | 232 } |
| 233 | |
| 5861 | 234 tree_command * |
|
7767
71f068b22fcc
scope and context fixes for function handles
John W. Eaton <jwe@octave.org>
parents:
7336
diff
changeset
|
235 tree_static_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
|
236 symbol_table::context_id context) |
| 5861 | 237 { |
|
7767
71f068b22fcc
scope and context fixes for function handles
John W. Eaton <jwe@octave.org>
parents:
7336
diff
changeset
|
238 return |
|
71f068b22fcc
scope and context fixes for function handles
John W. Eaton <jwe@octave.org>
parents:
7336
diff
changeset
|
239 new tree_static_command (init_list ? init_list->dup (scope, context) : 0, |
|
71f068b22fcc
scope and context fixes for function handles
John W. Eaton <jwe@octave.org>
parents:
7336
diff
changeset
|
240 line (), column ()); |
| 5861 | 241 } |
| 242 | |
| 2982 | 243 /* |
| 244 ;;; Local Variables: *** | |
| 245 ;;; mode: C++ *** | |
| 246 ;;; End: *** | |
| 247 */ |