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6c65299b | 1 | /* Implement classes and message passing for Objective C. |
928c19bb | 2 | Copyright (C) 1992, 1993, 1994, 1995, 1997, 1998, 1999, 2000, 2001, |
d764a8e6 | 3 | 2002, 2003, 2004, 2005, 2007, 2008, 2009, 2010, 2011 |
ebfbbdc5 | 4 | Free Software Foundation, Inc. |
4cb8c14b | 5 | Contributed by Steve Naroff. |
6c65299b | 6 | |
b9593599 | 7 | This file is part of GCC. |
6c65299b | 8 | |
b9593599 | 9 | GCC is free software; you can redistribute it and/or modify |
6c65299b | 10 | it under the terms of the GNU General Public License as published by |
2b7d992a | 11 | the Free Software Foundation; either version 3, or (at your option) |
6c65299b RS |
12 | any later version. |
13 | ||
b9593599 | 14 | GCC is distributed in the hope that it will be useful, |
6c65299b RS |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
18 | ||
19 | You should have received a copy of the GNU General Public License | |
2b7d992a NC |
20 | along with GCC; see the file COPYING3. If not see |
21 | <http://www.gnu.org/licenses/>. */ | |
22 | ||
6c65299b | 23 | #include "config.h" |
90fbb8c9 | 24 | #include "system.h" |
4977bab6 ZW |
25 | #include "coretypes.h" |
26 | #include "tm.h" | |
6c65299b | 27 | #include "tree.h" |
6408ef33 ZL |
28 | |
29 | #ifdef OBJCPLUS | |
30 | #include "cp-tree.h" | |
31 | #else | |
6c65299b | 32 | #include "c-tree.h" |
29cc57cf | 33 | #include "c-lang.h" |
6408ef33 ZL |
34 | #endif |
35 | ||
39dabefd | 36 | #include "c-family/c-common.h" |
61d3ce20 | 37 | #include "c-family/c-objc.h" |
39dabefd | 38 | #include "c-family/c-pragma.h" |
91ebb981 | 39 | #include "c-family/c-format.h" |
6c65299b | 40 | #include "flags.h" |
e57e265b | 41 | #include "langhooks.h" |
e58232cd | 42 | #include "objc-act.h" |
6c65299b | 43 | #include "input.h" |
e31c7eec | 44 | #include "function.h" |
7cc273ad | 45 | #include "output.h" |
d6f4ec51 | 46 | #include "toplev.h" |
bcdb1106 | 47 | #include "ggc.h" |
9099cc4f | 48 | #include "debug.h" |
acce4e77 | 49 | #include "c-family/c-target.h" |
1da2ed5f | 50 | #include "diagnostic-core.h" |
f41c4af3 | 51 | #include "intl.h" |
0d446150 | 52 | #include "cgraph.h" |
093c7153 | 53 | #include "tree-iterator.h" |
6408ef33 | 54 | #include "hashtab.h" |
3f16185f | 55 | #include "langhooks-def.h" |
d764a8e6 IS |
56 | /* Different initialization, code gen and meta data generation for each |
57 | runtime. */ | |
58 | #include "objc-runtime-hooks.h" | |
59 | /* Routines used mainly by the runtimes. */ | |
60 | #include "objc-runtime-shared-support.h" | |
a1178b30 IS |
61 | /* For default_tree_printer (). */ |
62 | #include "tree-pretty-print.h" | |
63 | ||
245763e3 SB |
64 | /* For enum gimplify_status */ |
65 | #include "gimple.h" | |
66 | ||
38b9c8c3 ZL |
67 | static unsigned int should_call_super_dealloc = 0; |
68 | ||
6408ef33 ZL |
69 | /* When building Objective-C++, we are not linking against the C front-end |
70 | and so need to replicate the C tree-construction functions in some way. */ | |
71 | #ifdef OBJCPLUS | |
72 | #define OBJCP_REMAP_FUNCTIONS | |
73 | #include "objcp-decl.h" | |
74 | #endif /* OBJCPLUS */ | |
cff559bc | 75 | |
187e4b0f | 76 | /* This is the default way of generating a method name. */ |
b8a18805 NP |
77 | /* This has the problem that "test_method:argument:" and |
78 | "test:method_argument:" will generate the same name | |
79 | ("_i_Test__test_method_argument_" for an instance method of the | |
80 | class "Test"), so you can't have them both in the same class! | |
81 | Moreover, the demangling (going from | |
82 | "_i_Test__test_method_argument" back to the original name) is | |
83 | undefined because there are two correct ways of demangling the | |
84 | name. */ | |
187e4b0f | 85 | #ifndef OBJC_GEN_METHOD_LABEL |
b54b3fb0 RS |
86 | #define OBJC_GEN_METHOD_LABEL(BUF, IS_INST, CLASS_NAME, CAT_NAME, SEL_NAME, NUM) \ |
87 | do { \ | |
88 | char *temp; \ | |
89 | sprintf ((BUF), "_%s_%s_%s_%s", \ | |
90 | ((IS_INST) ? "i" : "c"), \ | |
91 | (CLASS_NAME), \ | |
92 | ((CAT_NAME)? (CAT_NAME) : ""), \ | |
93 | (SEL_NAME)); \ | |
94 | for (temp = (BUF); *temp; temp++) \ | |
95 | if (*temp == ':') *temp = '_'; \ | |
187e4b0f | 96 | } while (0) |
152551c6 | 97 | #endif |
e31c7eec TW |
98 | |
99 | /* These need specifying. */ | |
100 | #ifndef OBJC_FORWARDING_STACK_OFFSET | |
101 | #define OBJC_FORWARDING_STACK_OFFSET 0 | |
102 | #endif | |
103 | ||
104 | #ifndef OBJC_FORWARDING_MIN_OFFSET | |
105 | #define OBJC_FORWARDING_MIN_OFFSET 0 | |
106 | #endif | |
d764a8e6 | 107 | |
9dee6758 RS |
108 | /* Set up for use of obstacks. */ |
109 | ||
110 | #include "obstack.h" | |
111 | ||
9dee6758 | 112 | /* This obstack is used to accumulate the encoding of a data type. */ |
d764a8e6 | 113 | struct obstack util_obstack; |
9dee6758 | 114 | |
264fa2db ZL |
115 | /* This points to the beginning of obstack contents, so we can free |
116 | the whole contents. */ | |
117 | char *util_firstobj; | |
6c65299b | 118 | |
6c65299b RS |
119 | /*** Private Interface (procedures) ***/ |
120 | ||
d764a8e6 IS |
121 | /* Init stuff. */ |
122 | static void synth_module_prologue (void); | |
e31c7eec | 123 | |
0f41302f | 124 | /* Code generation. */ |
6c65299b | 125 | |
d4e72c58 | 126 | static tree start_class (enum tree_code, tree, tree, tree, tree); |
6408ef33 ZL |
127 | static tree continue_class (tree); |
128 | static void finish_class (tree); | |
a04a722b | 129 | static void start_method_def (tree, tree); |
d764a8e6 | 130 | |
6b192a09 | 131 | static tree start_protocol (enum tree_code, tree, tree, tree); |
dbb74365 | 132 | static tree build_method_decl (enum tree_code, tree, tree, tree, bool); |
92902b1b | 133 | static tree objc_add_method (tree, tree, int, bool); |
c37d8c30 | 134 | static tree add_instance_variable (tree, objc_ivar_visibility_kind, tree); |
6408ef33 ZL |
135 | static tree build_ivar_reference (tree); |
136 | static tree is_ivar (tree, tree); | |
6408ef33 | 137 | |
d11dd684 ZL |
138 | /* We only need the following for ObjC; ObjC++ will use C++'s definition |
139 | of DERIVED_FROM_P. */ | |
140 | #ifndef OBJCPLUS | |
141 | static bool objc_derived_from_p (tree, tree); | |
142 | #define DERIVED_FROM_P(PARENT, CHILD) objc_derived_from_p (PARENT, CHILD) | |
143 | #endif | |
668ea4b1 IS |
144 | |
145 | /* Property. */ | |
668ea4b1 IS |
146 | static void objc_gen_property_data (tree, tree); |
147 | static void objc_synthesize_getter (tree, tree, tree); | |
668ea4b1 | 148 | static void objc_synthesize_setter (tree, tree, tree); |
46a88c12 | 149 | static char *objc_build_property_setter_name (tree); |
668ea4b1 IS |
150 | static tree lookup_property (tree, tree); |
151 | static tree lookup_property_in_list (tree, tree); | |
152 | static tree lookup_property_in_protocol_list (tree, tree); | |
d764a8e6 | 153 | static void build_common_objc_property_accessor_helpers (void); |
668ea4b1 | 154 | |
d11dd684 ZL |
155 | static void objc_xref_basetypes (tree, tree); |
156 | ||
d11dd684 | 157 | static tree get_class_ivars (tree, bool); |
011d50d9 | 158 | |
f05b9d93 NP |
159 | static void build_fast_enumeration_state_template (void); |
160 | ||
38b9c8c3 ZL |
161 | #ifdef OBJCPLUS |
162 | static void objc_generate_cxx_cdtors (void); | |
163 | #endif | |
011d50d9 | 164 | |
a1178b30 | 165 | /* objc attribute */ |
944fb799 | 166 | static void objc_decl_method_attributes (tree*, tree, int); |
a1178b30 | 167 | static tree build_keyword_selector (tree); |
7cc273ad | 168 | |
8607f1bc | 169 | /* Hash tables to manage the global pool of method prototypes. */ |
d764a8e6 | 170 | static void hash_init (void); |
6c65299b | 171 | |
8607f1bc ZL |
172 | hash *nst_method_hash_list = 0; |
173 | hash *cls_method_hash_list = 0; | |
e31c7eec | 174 | |
660820d1 NP |
175 | /* Hash tables to manage the global pool of class names. */ |
176 | ||
177 | hash *cls_name_hash_list = 0; | |
178 | hash *als_name_hash_list = 0; | |
179 | ||
d764a8e6 IS |
180 | hash *ivar_offset_hash_list = 0; |
181 | ||
660820d1 NP |
182 | static void hash_class_name_enter (hash *, tree, tree); |
183 | static hash hash_class_name_lookup (hash *, tree); | |
184 | ||
011d50d9 | 185 | static hash hash_lookup (hash *, tree); |
011d50d9 | 186 | static tree lookup_method (tree, tree); |
264fa2db | 187 | static tree lookup_method_static (tree, tree, int); |
e31c7eec | 188 | |
668ea4b1 IS |
189 | static tree add_class (tree, tree); |
190 | static void add_category (tree, tree); | |
191 | static inline tree lookup_category (tree, tree); | |
192 | ||
6b192a09 | 193 | /* Protocols. */ |
e31c7eec | 194 | |
db0581ae NP |
195 | static tree lookup_protocol (tree, bool, bool); |
196 | static tree lookup_and_install_protocols (tree, bool); | |
6c65299b | 197 | |
0f41302f | 198 | /* Type encoding. */ |
6c65299b | 199 | |
011d50d9 | 200 | static void encode_type_qualifiers (tree); |
011d50d9 | 201 | static void encode_type (tree, int, int); |
6c65299b | 202 | |
f8893e47 | 203 | #ifdef OBJCPLUS |
011d50d9 | 204 | static void really_start_method (tree, tree); |
f8893e47 JM |
205 | #else |
206 | static void really_start_method (tree, struct c_arg_info *); | |
207 | #endif | |
38b9c8c3 | 208 | static int comp_proto_with_proto (tree, tree, int); |
26877873 | 209 | static tree objc_decay_parm_type (tree); |
6c65299b | 210 | |
0f41302f | 211 | /* Utilities for debugging and error diagnostics. */ |
6c65299b | 212 | |
6408ef33 ZL |
213 | static char *gen_type_name (tree); |
214 | static char *gen_type_name_0 (tree); | |
215 | static char *gen_method_decl (tree); | |
216 | static char *gen_declaration (tree); | |
e31c7eec | 217 | |
0f41302f | 218 | /* Everything else. */ |
e31c7eec | 219 | |
d764a8e6 IS |
220 | static void generate_struct_by_value_array (void) ATTRIBUTE_NORETURN; |
221 | ||
011d50d9 | 222 | static void mark_referenced_methods (void); |
9a179d01 | 223 | static bool objc_type_valid_for_messaging (tree type, bool allow_classes); |
d764a8e6 | 224 | static tree check_duplicates (hash, int, int); |
6c65299b RS |
225 | |
226 | /*** Private Interface (data) ***/ | |
38b9c8c3 | 227 | /* Flags for lookup_method_static(). */ |
a9625a91 NP |
228 | |
229 | /* Look for class methods. */ | |
230 | #define OBJC_LOOKUP_CLASS 1 | |
231 | /* Do not examine superclasses. */ | |
232 | #define OBJC_LOOKUP_NO_SUPER 2 | |
233 | /* Disable returning an instance method of a root class when a class | |
234 | method can't be found. */ | |
944fb799 | 235 | #define OBJC_LOOKUP_NO_INSTANCE_METHODS_OF_ROOT_CLASS 4 |
38b9c8c3 | 236 | |
ad074d60 | 237 | /* The OCTI_... enumeration itself is in objc/objc-act.h. */ |
8607f1bc | 238 | tree objc_global_trees[OCTI_MAX]; |
6c65299b | 239 | |
8607f1bc ZL |
240 | struct imp_entry *imp_list = 0; |
241 | int imp_count = 0; /* `@implementation' */ | |
242 | int cat_count = 0; /* `@category' */ | |
243 | ||
c37d8c30 | 244 | objc_ivar_visibility_kind objc_ivar_visibility; |
6408ef33 | 245 | |
264fa2db ZL |
246 | /* Use to generate method labels. */ |
247 | static int method_slot = 0; | |
6c65299b | 248 | |
92902b1b IS |
249 | /* Flag to say whether methods in a protocol are optional or |
250 | required. */ | |
251 | static bool objc_method_optional_flag = false; | |
252 | ||
c0c24aa4 NP |
253 | static int objc_collecting_ivars = 0; |
254 | ||
ec3e9f82 NP |
255 | /* Flag that is set to 'true' while we are processing a class |
256 | extension. Since a class extension just "reopens" the main | |
257 | @interface, this can be used to determine if we are in the main | |
258 | @interface, or in a class extension. */ | |
259 | static bool objc_in_class_extension = false; | |
260 | ||
51900510 | 261 | static char *errbuf; /* Buffer for error diagnostics */ |
6c65299b | 262 | |
6c39e757 NP |
263 | /* An array of all the local variables in the current function that |
264 | need to be marked as volatile. */ | |
265 | VEC(tree,gc) *local_variables_to_volatilize = NULL; | |
266 | ||
6408ef33 ZL |
267 | /* Store all constructed constant strings in a hash table so that |
268 | they get uniqued properly. */ | |
269 | ||
d1b38208 | 270 | struct GTY(()) string_descriptor { |
6408ef33 ZL |
271 | /* The literal argument . */ |
272 | tree literal; | |
273 | ||
274 | /* The resulting constant string. */ | |
275 | tree constructor; | |
276 | }; | |
277 | ||
278 | static GTY((param_is (struct string_descriptor))) htab_t string_htab; | |
279 | ||
6c65299b RS |
280 | FILE *gen_declaration_file; |
281 | ||
51900510 | 282 | /* Tells "encode_pointer/encode_aggregate" whether we are generating |
e31c7eec TW |
283 | type descriptors for instance variables (as opposed to methods). |
284 | Type descriptors for instance variables contain more information | |
ad074d60 | 285 | than methods (for static typing and embedded structures). */ |
e31c7eec | 286 | |
d764a8e6 | 287 | int generating_instance_variables = 0; |
24b97832 | 288 | |
d764a8e6 IS |
289 | /* Hooks for stuff that differs between runtimes. */ |
290 | objc_runtime_hooks runtime; | |
3e78185c | 291 | |
925e8657 NP |
292 | /* Create a temporary variable of type 'type'. If 'name' is set, uses |
293 | the specified name, else use no name. Returns the declaration of | |
294 | the type. The 'name' is mostly useful for debugging. | |
295 | */ | |
d764a8e6 | 296 | tree |
925e8657 NP |
297 | objc_create_temporary_var (tree type, const char *name) |
298 | { | |
299 | tree decl; | |
300 | ||
301 | if (name != NULL) | |
302 | { | |
303 | decl = build_decl (input_location, | |
304 | VAR_DECL, get_identifier (name), type); | |
305 | } | |
306 | else | |
307 | { | |
308 | decl = build_decl (input_location, | |
309 | VAR_DECL, NULL_TREE, type); | |
310 | } | |
311 | TREE_USED (decl) = 1; | |
312 | DECL_ARTIFICIAL (decl) = 1; | |
313 | DECL_IGNORED_P (decl) = 1; | |
314 | DECL_CONTEXT (decl) = current_function_decl; | |
315 | ||
316 | return decl; | |
317 | } | |
318 | ||
ad074d60 SS |
319 | /* Some platforms pass small structures through registers versus |
320 | through an invisible pointer. Determine at what size structure is | |
321 | the transition point between the two possibilities. */ | |
7cc273ad | 322 | |
e36bf33a | 323 | static void |
011d50d9 | 324 | generate_struct_by_value_array (void) |
7cc273ad L |
325 | { |
326 | tree type; | |
3e78185c | 327 | tree decls; |
7cc273ad L |
328 | int i, j; |
329 | int aggregate_in_mem[32]; | |
330 | int found = 0; | |
331 | ||
6da97b7b NP |
332 | /* Presumably no platform passes 32 byte structures in a register. */ |
333 | /* ??? As an example, m64/ppc/Darwin can pass up to 8*long+13*double | |
334 | in registers. */ | |
7cc273ad L |
335 | for (i = 1; i < 32; i++) |
336 | { | |
337 | char buffer[5]; | |
3e78185c | 338 | tree *chain = NULL; |
7cc273ad L |
339 | |
340 | /* Create an unnamed struct that has `i' character components */ | |
24b97832 | 341 | type = objc_start_struct (NULL_TREE); |
7cc273ad L |
342 | |
343 | strcpy (buffer, "c1"); | |
3e78185c | 344 | decls = add_field_decl (char_type_node, buffer, &chain); |
7cc273ad L |
345 | |
346 | for (j = 1; j < i; j++) | |
347 | { | |
348 | sprintf (buffer, "c%d", j + 1); | |
3e78185c | 349 | add_field_decl (char_type_node, buffer, &chain); |
7cc273ad | 350 | } |
3e78185c | 351 | objc_finish_struct (type, decls); |
011d50d9 | 352 | |
61f71b34 | 353 | aggregate_in_mem[i] = aggregate_value_p (type, 0); |
7cc273ad L |
354 | if (!aggregate_in_mem[i]) |
355 | found = 1; | |
356 | } | |
011d50d9 | 357 | |
7cc273ad | 358 | /* We found some structures that are returned in registers instead of memory |
ad074d60 | 359 | so output the necessary data. */ |
7cc273ad L |
360 | if (found) |
361 | { | |
362 | for (i = 31; i >= 0; i--) | |
363 | if (!aggregate_in_mem[i]) | |
364 | break; | |
2d66a8d3 | 365 | printf ("#define OBJC_MAX_STRUCT_BY_VALUE %d\n", i); |
7cc273ad | 366 | } |
011d50d9 | 367 | |
7cc273ad L |
368 | exit (0); |
369 | } | |
370 | ||
4bfec483 | 371 | bool |
011d50d9 | 372 | objc_init (void) |
6c65299b | 373 | { |
d764a8e6 | 374 | bool ok; |
6408ef33 ZL |
375 | #ifdef OBJCPLUS |
376 | if (cxx_init () == false) | |
377 | #else | |
4bfec483 | 378 | if (c_objc_common_init () == false) |
6408ef33 | 379 | #endif |
4bfec483 | 380 | return false; |
f5e99456 | 381 | |
6da97b7b NP |
382 | /* print_struct_values is triggered by -print-runtime-info (used |
383 | when building libobjc, with an empty file as input). It does not | |
384 | require any ObjC setup, and it never returns. | |
385 | ||
386 | -fcompare-debug is used to check the compiler output; we are | |
387 | executed twice, once with flag_compare_debug set, and once with | |
388 | it not set. If the flag is used together with | |
389 | -print-runtime-info, we want to print the runtime info only once, | |
390 | else it would be output in duplicate. So we check | |
391 | flag_compare_debug to output it in only one of the invocations. | |
392 | ||
393 | As a side effect, this also that means -fcompare-debug | |
394 | -print-runtime-info will run the compiler twice, and compare the | |
395 | generated assembler file; the first time the compiler exits | |
396 | immediately (producing no file), and the second time it compiles | |
397 | an empty file. This checks, as a side effect, that compiling an | |
398 | empty file produces no assembler output. */ | |
d764a8e6 | 399 | if (print_struct_values && !flag_compare_debug) |
d764a8e6 | 400 | generate_struct_by_value_array (); |
6c65299b | 401 | |
d764a8e6 IS |
402 | /* Set up stuff used by FE parser and all runtimes. */ |
403 | errbuf = XNEWVEC (char, 1024 * 10); | |
404 | hash_init (); | |
405 | gcc_obstack_init (&util_obstack); | |
406 | util_firstobj = (char *) obstack_finish (&util_obstack); | |
e31c7eec | 407 | |
d764a8e6 IS |
408 | /* ... and then check flags and set-up for the selected runtime ... */ |
409 | if (flag_next_runtime && flag_objc_abi >= 2) | |
410 | ok = objc_next_runtime_abi_02_init (&runtime); | |
411 | else if (flag_next_runtime) | |
412 | ok = objc_next_runtime_abi_01_init (&runtime); | |
413 | else | |
414 | ok = objc_gnu_runtime_abi_01_init (&runtime); | |
7cc273ad | 415 | |
d764a8e6 IS |
416 | /* If that part of the setup failed - bail out immediately. */ |
417 | if (!ok) | |
418 | return false; | |
bcdb1106 | 419 | |
d764a8e6 IS |
420 | /* Generate general types and push runtime-specific decls to file scope. */ |
421 | synth_module_prologue (); | |
46270f14 | 422 | |
4bfec483 | 423 | return true; |
8b0e9a72 AO |
424 | } |
425 | ||
977e30bc NP |
426 | /* This is called automatically (at the very end of compilation) by |
427 | c_write_global_declarations and cp_write_global_declarations. */ | |
6c65299b | 428 | void |
977e30bc | 429 | objc_write_global_declarations (void) |
6c65299b | 430 | { |
0d446150 | 431 | mark_referenced_methods (); |
8b0e9a72 | 432 | |
d764a8e6 IS |
433 | /* A missing @end might not be detected by the parser. */ |
434 | if (objc_implementation_context) | |
435 | { | |
436 | warning (0, "%<@end%> missing in implementation context"); | |
437 | finish_class (objc_implementation_context); | |
438 | objc_ivar_chain = NULL_TREE; | |
439 | objc_implementation_context = NULL_TREE; | |
440 | } | |
441 | ||
442 | if (warn_selector) | |
443 | { | |
444 | int slot; | |
445 | hash hsh; | |
446 | ||
447 | /* Run through the selector hash tables and print a warning for any | |
448 | selector which has multiple methods. */ | |
449 | ||
450 | for (slot = 0; slot < SIZEHASHTABLE; slot++) | |
451 | { | |
452 | for (hsh = cls_method_hash_list[slot]; hsh; hsh = hsh->next) | |
453 | check_duplicates (hsh, 0, 1); | |
454 | for (hsh = nst_method_hash_list[slot]; hsh; hsh = hsh->next) | |
455 | check_duplicates (hsh, 0, 0); | |
456 | } | |
457 | } | |
458 | ||
459 | /* TODO: consider an early exit here if either errorcount or sorrycount | |
460 | is non-zero. Not only is it wasting time to generate the metadata, | |
944fb799 | 461 | it needlessly imposes need to re-check for things that are already |
d764a8e6 | 462 | determined to be errors. */ |
6c65299b | 463 | |
d764a8e6 IS |
464 | /* Finalize Objective-C runtime data. No need to generate tables |
465 | and code if only checking syntax, or if generating a PCH file. */ | |
466 | if (!flag_syntax_only && !pch_file) | |
467 | { | |
6d549148 NP |
468 | location_t saved_location; |
469 | ||
d764a8e6 IS |
470 | /* If gen_declaration desired, open the output file. */ |
471 | if (flag_gen_declaration) | |
472 | { | |
473 | char * const dumpname = concat (dump_base_name, ".decl", NULL); | |
474 | gen_declaration_file = fopen (dumpname, "w"); | |
475 | if (gen_declaration_file == 0) | |
476 | fatal_error ("can%'t open %s: %m", dumpname); | |
477 | free (dumpname); | |
478 | } | |
6d549148 NP |
479 | |
480 | /* Set the input location to BUILTINS_LOCATION. This is good | |
481 | for error messages, in case any is generated while producing | |
482 | the metadata, but it also silences warnings that would be | |
483 | produced when compiling with -Wpadded in case when padding is | |
484 | automatically added to the built-in runtime data structure | |
485 | declarations. We know about this padding, and it is fine; we | |
486 | don't want users to see any warnings about it if they use | |
487 | -Wpadded. */ | |
488 | saved_location = input_location; | |
489 | input_location = BUILTINS_LOCATION; | |
490 | ||
d764a8e6 IS |
491 | /* Compute and emit the meta-data tables for this runtime. */ |
492 | (*runtime.generate_metadata) (); | |
6d549148 NP |
493 | |
494 | /* Restore the original location, just in case it mattered. */ | |
495 | input_location = saved_location; | |
496 | ||
d764a8e6 IS |
497 | /* ... and then close any declaration file we opened. */ |
498 | if (gen_declaration_file) | |
499 | fclose (gen_declaration_file); | |
500 | } | |
6c65299b | 501 | } |
d764a8e6 | 502 | |
5c234cd7 DA |
503 | /* Return the first occurrence of a method declaration corresponding |
504 | to sel_name in rproto_list. Search rproto_list recursively. | |
505 | If is_class is 0, search for instance methods, otherwise for class | |
506 | methods. */ | |
e31c7eec | 507 | static tree |
011d50d9 | 508 | lookup_method_in_protocol_list (tree rproto_list, tree sel_name, |
5c234cd7 | 509 | int is_class) |
e31c7eec | 510 | { |
354d8ce1 | 511 | tree rproto, p, m; |
e31c7eec TW |
512 | |
513 | for (rproto = rproto_list; rproto; rproto = TREE_CHAIN (rproto)) | |
514 | { | |
354d8ce1 NP |
515 | p = TREE_VALUE (rproto); |
516 | m = NULL_TREE; | |
e31c7eec TW |
517 | |
518 | if (TREE_CODE (p) == PROTOCOL_INTERFACE_TYPE) | |
519 | { | |
354d8ce1 NP |
520 | /* First, search the @required protocol methods. */ |
521 | if (is_class) | |
522 | m = lookup_method (PROTOCOL_CLS_METHODS (p), sel_name); | |
523 | else | |
524 | m = lookup_method (PROTOCOL_NST_METHODS (p), sel_name); | |
525 | ||
526 | if (m) | |
527 | return m; | |
528 | ||
529 | /* If still not found, search the @optional protocol methods. */ | |
530 | if (is_class) | |
531 | m = lookup_method (PROTOCOL_OPTIONAL_CLS_METHODS (p), sel_name); | |
532 | else | |
533 | m = lookup_method (PROTOCOL_OPTIONAL_NST_METHODS (p), sel_name); | |
534 | ||
535 | if (m) | |
536 | return m; | |
537 | ||
538 | /* If still not found, search the attached protocols. */ | |
539 | if (PROTOCOL_LIST (p)) | |
540 | m = lookup_method_in_protocol_list (PROTOCOL_LIST (p), | |
541 | sel_name, is_class); | |
542 | if (m) | |
543 | return m; | |
e31c7eec TW |
544 | } |
545 | else | |
51723711 KG |
546 | { |
547 | ; /* An identifier...if we could not find a protocol. */ | |
548 | } | |
e31c7eec | 549 | } |
51900510 | 550 | |
e31c7eec TW |
551 | return 0; |
552 | } | |
553 | ||
554 | static tree | |
011d50d9 | 555 | lookup_protocol_in_reflist (tree rproto_list, tree lproto) |
e31c7eec | 556 | { |
ad074d60 | 557 | tree rproto, p; |
e31c7eec | 558 | |
ad074d60 SS |
559 | /* Make sure the protocol is supported by the object on the rhs. */ |
560 | if (TREE_CODE (lproto) == PROTOCOL_INTERFACE_TYPE) | |
561 | { | |
562 | tree fnd = 0; | |
563 | for (rproto = rproto_list; rproto; rproto = TREE_CHAIN (rproto)) | |
564 | { | |
565 | p = TREE_VALUE (rproto); | |
e31c7eec | 566 | |
ad074d60 SS |
567 | if (TREE_CODE (p) == PROTOCOL_INTERFACE_TYPE) |
568 | { | |
569 | if (lproto == p) | |
570 | fnd = lproto; | |
e31c7eec | 571 | |
ad074d60 SS |
572 | else if (PROTOCOL_LIST (p)) |
573 | fnd = lookup_protocol_in_reflist (PROTOCOL_LIST (p), lproto); | |
574 | } | |
e31c7eec | 575 | |
ad074d60 SS |
576 | if (fnd) |
577 | return fnd; | |
578 | } | |
579 | } | |
580 | else | |
581 | { | |
582 | ; /* An identifier...if we could not find a protocol. */ | |
583 | } | |
e31c7eec | 584 | |
ad074d60 | 585 | return 0; |
6c65299b RS |
586 | } |
587 | ||
6408ef33 | 588 | void |
c165dca7 IS |
589 | objc_start_class_interface (tree klass, tree super_class, |
590 | tree protos, tree attributes) | |
6408ef33 | 591 | { |
d4e72c58 | 592 | if (flag_objc1_only && attributes) |
944fb799 | 593 | error_at (input_location, "class attributes are not available in Objective-C 1.0"); |
d4e72c58 | 594 | |
6408ef33 ZL |
595 | objc_interface_context |
596 | = objc_ivar_context | |
d4e72c58 | 597 | = start_class (CLASS_INTERFACE_TYPE, klass, super_class, protos, attributes); |
c37d8c30 | 598 | objc_ivar_visibility = OBJC_IVAR_VIS_PROTECTED; |
6408ef33 ZL |
599 | } |
600 | ||
601 | void | |
c165dca7 IS |
602 | objc_start_category_interface (tree klass, tree categ, |
603 | tree protos, tree attributes) | |
6408ef33 | 604 | { |
c165dca7 | 605 | if (attributes) |
22d8d616 NP |
606 | { |
607 | if (flag_objc1_only) | |
608 | error_at (input_location, "category attributes are not available in Objective-C 1.0"); | |
609 | else | |
944fb799 | 610 | warning_at (input_location, OPT_Wattributes, |
22d8d616 NP |
611 | "category attributes are not available in this version" |
612 | " of the compiler, (ignored)"); | |
613 | } | |
ec3e9f82 NP |
614 | if (categ == NULL_TREE) |
615 | { | |
616 | if (flag_objc1_only) | |
617 | error_at (input_location, "class extensions are not available in Objective-C 1.0"); | |
35bce82a NP |
618 | else |
619 | { | |
620 | /* Iterate over all the classes and categories implemented | |
621 | up to now in this compilation unit. */ | |
622 | struct imp_entry *t; | |
623 | ||
624 | for (t = imp_list; t; t = t->next) | |
625 | { | |
626 | /* If we find a class @implementation with the same name | |
627 | as the one we are extending, produce an error. */ | |
628 | if (TREE_CODE (t->imp_context) == CLASS_IMPLEMENTATION_TYPE | |
629 | && IDENTIFIER_POINTER (CLASS_NAME (t->imp_context)) == IDENTIFIER_POINTER (klass)) | |
944fb799 | 630 | error_at (input_location, |
35bce82a NP |
631 | "class extension for class %qE declared after its %<@implementation%>", |
632 | klass); | |
633 | } | |
634 | } | |
ec3e9f82 | 635 | } |
6408ef33 | 636 | objc_interface_context |
d4e72c58 | 637 | = start_class (CATEGORY_INTERFACE_TYPE, klass, categ, protos, NULL_TREE); |
6408ef33 ZL |
638 | objc_ivar_chain |
639 | = continue_class (objc_interface_context); | |
640 | } | |
641 | ||
642 | void | |
c165dca7 | 643 | objc_start_protocol (tree name, tree protos, tree attributes) |
6408ef33 | 644 | { |
6b192a09 | 645 | if (flag_objc1_only && attributes) |
944fb799 | 646 | error_at (input_location, "protocol attributes are not available in Objective-C 1.0"); |
6b192a09 | 647 | |
6408ef33 | 648 | objc_interface_context |
6b192a09 | 649 | = start_protocol (PROTOCOL_INTERFACE_TYPE, name, protos, attributes); |
92902b1b | 650 | objc_method_optional_flag = false; |
6408ef33 ZL |
651 | } |
652 | ||
653 | void | |
654 | objc_continue_interface (void) | |
655 | { | |
656 | objc_ivar_chain | |
657 | = continue_class (objc_interface_context); | |
658 | } | |
659 | ||
660 | void | |
661 | objc_finish_interface (void) | |
662 | { | |
663 | finish_class (objc_interface_context); | |
664 | objc_interface_context = NULL_TREE; | |
92902b1b | 665 | objc_method_optional_flag = false; |
ec3e9f82 | 666 | objc_in_class_extension = false; |
6408ef33 ZL |
667 | } |
668 | ||
669 | void | |
5025f379 | 670 | objc_start_class_implementation (tree klass, tree super_class) |
6408ef33 ZL |
671 | { |
672 | objc_implementation_context | |
673 | = objc_ivar_context | |
d4e72c58 NP |
674 | = start_class (CLASS_IMPLEMENTATION_TYPE, klass, super_class, NULL_TREE, |
675 | NULL_TREE); | |
c37d8c30 | 676 | objc_ivar_visibility = OBJC_IVAR_VIS_PROTECTED; |
6408ef33 ZL |
677 | } |
678 | ||
679 | void | |
5025f379 | 680 | objc_start_category_implementation (tree klass, tree categ) |
6408ef33 ZL |
681 | { |
682 | objc_implementation_context | |
d4e72c58 NP |
683 | = start_class (CATEGORY_IMPLEMENTATION_TYPE, klass, categ, NULL_TREE, |
684 | NULL_TREE); | |
6408ef33 ZL |
685 | objc_ivar_chain |
686 | = continue_class (objc_implementation_context); | |
687 | } | |
688 | ||
689 | void | |
690 | objc_continue_implementation (void) | |
691 | { | |
692 | objc_ivar_chain | |
693 | = continue_class (objc_implementation_context); | |
694 | } | |
695 | ||
696 | void | |
697 | objc_finish_implementation (void) | |
698 | { | |
38b9c8c3 ZL |
699 | #ifdef OBJCPLUS |
700 | if (flag_objc_call_cxx_cdtors) | |
701 | objc_generate_cxx_cdtors (); | |
702 | #endif | |
703 | ||
6408ef33 ZL |
704 | if (objc_implementation_context) |
705 | { | |
706 | finish_class (objc_implementation_context); | |
707 | objc_ivar_chain = NULL_TREE; | |
708 | objc_implementation_context = NULL_TREE; | |
709 | } | |
710 | else | |
d4ee4d25 | 711 | warning (0, "%<@end%> must appear in an @implementation context"); |
6408ef33 ZL |
712 | } |
713 | ||
714 | void | |
c37d8c30 | 715 | objc_set_visibility (objc_ivar_visibility_kind visibility) |
6408ef33 | 716 | { |
c37d8c30 | 717 | if (visibility == OBJC_IVAR_VIS_PACKAGE) |
22d8d616 NP |
718 | { |
719 | if (flag_objc1_only) | |
720 | error ("%<@package%> is not available in Objective-C 1.0"); | |
721 | else | |
722 | warning (0, "%<@package%> presently has the same effect as %<@public%>"); | |
723 | } | |
c37d8c30 | 724 | objc_ivar_visibility = visibility; |
6408ef33 ZL |
725 | } |
726 | ||
92902b1b IS |
727 | void |
728 | objc_set_method_opt (bool optional) | |
729 | { | |
22d8d616 | 730 | if (flag_objc1_only) |
445eb4c6 NP |
731 | { |
732 | if (optional) | |
944fb799 | 733 | error_at (input_location, "%<@optional%> is not available in Objective-C 1.0"); |
445eb4c6 | 734 | else |
944fb799 | 735 | error_at (input_location, "%<@required%> is not available in Objective-C 1.0"); |
445eb4c6 | 736 | } |
22d8d616 | 737 | |
92902b1b | 738 | objc_method_optional_flag = optional; |
944fb799 | 739 | if (!objc_interface_context |
92902b1b IS |
740 | || TREE_CODE (objc_interface_context) != PROTOCOL_INTERFACE_TYPE) |
741 | { | |
445eb4c6 NP |
742 | if (optional) |
743 | error ("%<@optional%> is allowed in @protocol context only"); | |
744 | else | |
745 | error ("%<@required%> is allowed in @protocol context only"); | |
92902b1b IS |
746 | objc_method_optional_flag = false; |
747 | } | |
748 | } | |
749 | ||
4ca5d2a7 NP |
750 | /* This routine looks for a given PROPERTY in a list of CLASS, CATEGORY, or |
751 | PROTOCOL. */ | |
752 | static tree | |
753 | lookup_property_in_list (tree chain, tree property) | |
754 | { | |
755 | tree x; | |
756 | for (x = CLASS_PROPERTY_DECL (chain); x; x = TREE_CHAIN (x)) | |
757 | if (PROPERTY_NAME (x) == property) | |
758 | return x; | |
759 | return NULL_TREE; | |
760 | } | |
761 | ||
762 | /* This routine looks for a given PROPERTY in the tree chain of RPROTO_LIST. */ | |
763 | static tree lookup_property_in_protocol_list (tree rproto_list, tree property) | |
764 | { | |
765 | tree rproto, x; | |
766 | for (rproto = rproto_list; rproto; rproto = TREE_CHAIN (rproto)) | |
767 | { | |
768 | tree p = TREE_VALUE (rproto); | |
769 | if (TREE_CODE (p) == PROTOCOL_INTERFACE_TYPE) | |
770 | { | |
771 | if ((x = lookup_property_in_list (p, property))) | |
772 | return x; | |
773 | if (PROTOCOL_LIST (p)) | |
774 | return lookup_property_in_protocol_list (PROTOCOL_LIST (p), property); | |
775 | } | |
776 | else | |
777 | { | |
778 | ; /* An identifier...if we could not find a protocol. */ | |
779 | } | |
780 | } | |
781 | return NULL_TREE; | |
782 | } | |
783 | ||
784 | /* This routine looks up the PROPERTY in current INTERFACE, its categories and up the | |
785 | chain of interface hierarchy. */ | |
786 | static tree | |
787 | lookup_property (tree interface_type, tree property) | |
788 | { | |
789 | tree inter = interface_type; | |
790 | while (inter) | |
791 | { | |
792 | tree x, category; | |
793 | if ((x = lookup_property_in_list (inter, property))) | |
794 | return x; | |
795 | /* Failing that, look for the property in each category of the class. */ | |
796 | category = inter; | |
797 | while ((category = CLASS_CATEGORY_LIST (category))) | |
798 | { | |
799 | if ((x = lookup_property_in_list (category, property))) | |
800 | return x; | |
801 | ||
802 | /* When checking a category, also check the protocols | |
803 | attached with the category itself. */ | |
804 | if (CLASS_PROTOCOL_LIST (category) | |
805 | && (x = lookup_property_in_protocol_list | |
806 | (CLASS_PROTOCOL_LIST (category), property))) | |
807 | return x; | |
808 | } | |
809 | ||
810 | /* Failing to find in categories, look for property in protocol list. */ | |
944fb799 | 811 | if (CLASS_PROTOCOL_LIST (inter) |
4ca5d2a7 NP |
812 | && (x = lookup_property_in_protocol_list |
813 | (CLASS_PROTOCOL_LIST (inter), property))) | |
814 | return x; | |
944fb799 | 815 | |
4ca5d2a7 NP |
816 | /* Failing that, climb up the inheritance hierarchy. */ |
817 | inter = lookup_interface (CLASS_SUPER_NAME (inter)); | |
818 | } | |
819 | return inter; | |
820 | } | |
821 | ||
200290f2 NP |
822 | /* This routine is called by the parser when a |
823 | @property... declaration is found. 'decl' is the declaration of | |
824 | the property (type/identifier), and the other arguments represent | |
825 | property attributes that may have been specified in the Objective-C | |
826 | declaration. 'parsed_property_readonly' is 'true' if the attribute | |
827 | 'readonly' was specified, and 'false' if not; similarly for the | |
828 | other bool parameters. 'parsed_property_getter_ident' is NULL_TREE | |
829 | if the attribute 'getter' was not specified, and is the identifier | |
830 | corresponding to the specified getter if it was; similarly for | |
831 | 'parsed_property_setter_ident'. */ | |
668ea4b1 | 832 | void |
200290f2 NP |
833 | objc_add_property_declaration (location_t location, tree decl, |
834 | bool parsed_property_readonly, bool parsed_property_readwrite, | |
835 | bool parsed_property_assign, bool parsed_property_retain, | |
836 | bool parsed_property_copy, bool parsed_property_nonatomic, | |
46a88c12 | 837 | tree parsed_property_getter_ident, tree parsed_property_setter_ident) |
668ea4b1 | 838 | { |
200290f2 NP |
839 | tree property_decl; |
840 | tree x; | |
46a88c12 NP |
841 | /* 'property_readonly' and 'property_assign_semantics' are the final |
842 | attributes of the property after all parsed attributes have been | |
843 | considered (eg, if we parsed no 'readonly' and no 'readwrite', ie | |
844 | parsed_property_readonly = false and parsed_property_readwrite = | |
845 | false, then property_readonly will be false because the default | |
846 | is readwrite). */ | |
200290f2 | 847 | bool property_readonly = false; |
46a88c12 | 848 | objc_property_assign_semantics property_assign_semantics = OBJC_PROPERTY_ASSIGN; |
ec3e9f82 | 849 | bool property_extension_in_class_extension = false; |
200290f2 | 850 | |
22d8d616 NP |
851 | if (flag_objc1_only) |
852 | error_at (input_location, "%<@property%> is not available in Objective-C 1.0"); | |
853 | ||
200290f2 | 854 | if (parsed_property_readonly && parsed_property_readwrite) |
668ea4b1 | 855 | { |
200290f2 NP |
856 | error_at (location, "%<readonly%> attribute conflicts with %<readwrite%> attribute"); |
857 | /* In case of conflicting attributes (here and below), after | |
858 | producing an error, we pick one of the attributes and keep | |
859 | going. */ | |
860 | property_readonly = false; | |
861 | } | |
862 | else | |
863 | { | |
864 | if (parsed_property_readonly) | |
668ea4b1 | 865 | property_readonly = true; |
944fb799 | 866 | |
200290f2 NP |
867 | if (parsed_property_readwrite) |
868 | property_readonly = false; | |
668ea4b1 | 869 | } |
668ea4b1 | 870 | |
200290f2 NP |
871 | if (parsed_property_readonly && parsed_property_setter_ident) |
872 | { | |
8926bd5d | 873 | error_at (location, "%<readonly%> attribute conflicts with %<setter%> attribute"); |
46a88c12 | 874 | property_readonly = false; |
200290f2 | 875 | } |
668ea4b1 | 876 | |
200290f2 NP |
877 | if (parsed_property_assign && parsed_property_retain) |
878 | { | |
879 | error_at (location, "%<assign%> attribute conflicts with %<retain%> attribute"); | |
880 | property_assign_semantics = OBJC_PROPERTY_RETAIN; | |
881 | } | |
882 | else if (parsed_property_assign && parsed_property_copy) | |
883 | { | |
884 | error_at (location, "%<assign%> attribute conflicts with %<copy%> attribute"); | |
885 | property_assign_semantics = OBJC_PROPERTY_COPY; | |
886 | } | |
887 | else if (parsed_property_retain && parsed_property_copy) | |
888 | { | |
889 | error_at (location, "%<retain%> attribute conflicts with %<copy%> attribute"); | |
890 | property_assign_semantics = OBJC_PROPERTY_COPY; | |
891 | } | |
892 | else | |
893 | { | |
894 | if (parsed_property_assign) | |
895 | property_assign_semantics = OBJC_PROPERTY_ASSIGN; | |
668ea4b1 | 896 | |
200290f2 NP |
897 | if (parsed_property_retain) |
898 | property_assign_semantics = OBJC_PROPERTY_RETAIN; | |
899 | ||
900 | if (parsed_property_copy) | |
901 | property_assign_semantics = OBJC_PROPERTY_COPY; | |
902 | } | |
903 | ||
46a88c12 | 904 | if (!objc_interface_context) |
668ea4b1 | 905 | { |
46a88c12 | 906 | error_at (location, "property declaration not in @interface or @protocol context"); |
668ea4b1 IS |
907 | return; |
908 | } | |
909 | ||
46a88c12 NP |
910 | /* At this point we know that we are either in an interface, a |
911 | category, or a protocol. */ | |
912 | ||
8926bd5d NP |
913 | /* We expect a FIELD_DECL from the parser. Make sure we didn't get |
914 | something else, as that would confuse the checks below. */ | |
915 | if (TREE_CODE (decl) != FIELD_DECL) | |
916 | { | |
917 | error_at (location, "invalid property declaration"); | |
944fb799 | 918 | return; |
8926bd5d NP |
919 | } |
920 | ||
921 | /* Do some spot-checks for the most obvious invalid types. */ | |
922 | ||
923 | if (TREE_CODE (TREE_TYPE (decl)) == ARRAY_TYPE) | |
46a88c12 | 924 | { |
8926bd5d | 925 | error_at (location, "property can not be an array"); |
46a88c12 NP |
926 | return; |
927 | } | |
668ea4b1 | 928 | |
8926bd5d NP |
929 | /* The C++/ObjC++ parser seems to reject the ':' for a bitfield when |
930 | parsing, while the C/ObjC parser accepts it and gives us a | |
931 | FIELD_DECL with a DECL_INITIAL set. So we use the DECL_INITIAL | |
932 | to check for a bitfield when doing ObjC. */ | |
933 | #ifndef OBJCPLUS | |
934 | if (DECL_INITIAL (decl)) | |
935 | { | |
936 | /* A @property is not an actual variable, but it is a way to | |
937 | describe a pair of accessor methods, so its type (which is | |
938 | the type of the return value of the getter and the first | |
939 | argument of the setter) can't be a bitfield (as return values | |
940 | and arguments of functions can not be bitfields). The | |
941 | underlying instance variable could be a bitfield, but that is | |
942 | a different matter. */ | |
943 | error_at (location, "property can not be a bit-field"); | |
944fb799 | 944 | return; |
8926bd5d NP |
945 | } |
946 | #endif | |
947 | ||
948 | /* TODO: Check that the property type is an Objective-C object or a | |
949 | "POD". */ | |
46a88c12 | 950 | |
9a179d01 NP |
951 | /* Implement -Wproperty-assign-default (which is enabled by default). */ |
952 | if (warn_property_assign_default | |
46a88c12 NP |
953 | /* If garbage collection is not being used, then 'assign' is |
954 | valid for objects (and typically used for delegates) but it | |
955 | is wrong in most cases (since most objects need to be | |
956 | retained or copied in setters). Warn users when 'assign' is | |
957 | used implicitly. */ | |
9a179d01 NP |
958 | && property_assign_semantics == OBJC_PROPERTY_ASSIGN |
959 | /* Read-only properties are never assigned, so the assignment | |
960 | semantics do not matter in that case. */ | |
961 | && !property_readonly | |
962 | && !flag_objc_gc) | |
963 | { | |
46a88c12 NP |
964 | /* Please note that it would make sense to default to 'assign' |
965 | for non-{Objective-C objects}, and to 'retain' for | |
966 | Objective-C objects. But that would break compatibility with | |
967 | other compilers. */ | |
9a179d01 | 968 | if (!parsed_property_assign && !parsed_property_retain && !parsed_property_copy) |
668ea4b1 | 969 | { |
9a179d01 NP |
970 | /* Use 'false' so we do not warn for Class objects. */ |
971 | if (objc_type_valid_for_messaging (TREE_TYPE (decl), false)) | |
668ea4b1 | 972 | { |
944fb799 | 973 | warning_at (location, |
9a179d01 | 974 | 0, |
944fb799 | 975 | "object property %qD has no %<assign%>, %<retain%> or %<copy%> attribute; assuming %<assign%>", |
9a179d01 | 976 | decl); |
944fb799 | 977 | inform (location, |
9a179d01 | 978 | "%<assign%> can be unsafe for Objective-C objects; please state explicitly if you need it"); |
668ea4b1 IS |
979 | } |
980 | } | |
668ea4b1 | 981 | } |
944fb799 | 982 | |
46a88c12 | 983 | if (property_assign_semantics == OBJC_PROPERTY_RETAIN |
9a179d01 | 984 | && !objc_type_valid_for_messaging (TREE_TYPE (decl), true)) |
46a88c12 | 985 | error_at (location, "%<retain%> attribute is only valid for Objective-C objects"); |
944fb799 | 986 | |
46a88c12 | 987 | if (property_assign_semantics == OBJC_PROPERTY_COPY |
9a179d01 | 988 | && !objc_type_valid_for_messaging (TREE_TYPE (decl), true)) |
46a88c12 | 989 | error_at (location, "%<copy%> attribute is only valid for Objective-C objects"); |
200290f2 | 990 | |
4ca5d2a7 NP |
991 | /* Now determine the final property getter and setter names. They |
992 | will be stored in the PROPERTY_DECL, from which they'll always be | |
993 | extracted and used. */ | |
994 | ||
995 | /* Adjust, or fill in, setter and getter names. We overwrite the | |
996 | parsed_property_setter_ident and parsed_property_getter_ident | |
997 | with the final setter and getter identifiers that will be | |
998 | used. */ | |
999 | if (parsed_property_setter_ident) | |
1000 | { | |
1001 | /* The setter should be terminated by ':', but the parser only | |
1002 | gives us an identifier without ':'. So, we need to add ':' | |
1003 | at the end. */ | |
1004 | const char *parsed_setter = IDENTIFIER_POINTER (parsed_property_setter_ident); | |
1005 | size_t length = strlen (parsed_setter); | |
1006 | char *final_setter = (char *)alloca (length + 2); | |
1007 | ||
1008 | sprintf (final_setter, "%s:", parsed_setter); | |
1009 | parsed_property_setter_ident = get_identifier (final_setter); | |
1010 | } | |
1011 | else | |
1012 | { | |
1013 | if (!property_readonly) | |
944fb799 | 1014 | parsed_property_setter_ident = get_identifier (objc_build_property_setter_name |
4ca5d2a7 NP |
1015 | (DECL_NAME (decl))); |
1016 | } | |
1017 | ||
1018 | if (!parsed_property_getter_ident) | |
1019 | parsed_property_getter_ident = DECL_NAME (decl); | |
1020 | ||
46a88c12 | 1021 | /* Check for duplicate property declarations. We first check the |
4ca5d2a7 | 1022 | immediate context for a property with the same name. Any such |
ec3e9f82 NP |
1023 | declarations are an error, unless this is a class extension and |
1024 | we are extending a property from readonly to readwrite. */ | |
46a88c12 NP |
1025 | for (x = CLASS_PROPERTY_DECL (objc_interface_context); x; x = TREE_CHAIN (x)) |
1026 | { | |
1027 | if (PROPERTY_NAME (x) == DECL_NAME (decl)) | |
668ea4b1 | 1028 | { |
ec3e9f82 NP |
1029 | if (objc_in_class_extension |
1030 | && property_readonly == 0 | |
1031 | && PROPERTY_READONLY (x) == 1) | |
1032 | { | |
1033 | /* This is a class extension, and we are extending an | |
1034 | existing readonly property to a readwrite one. | |
1035 | That's fine. :-) */ | |
1036 | property_extension_in_class_extension = true; | |
1037 | break; | |
1038 | } | |
1039 | else | |
1040 | { | |
1041 | location_t original_location = DECL_SOURCE_LOCATION (x); | |
944fb799 | 1042 | |
ec3e9f82 | 1043 | error_at (location, "redeclaration of property %qD", decl); |
944fb799 | 1044 | |
ec3e9f82 NP |
1045 | if (original_location != UNKNOWN_LOCATION) |
1046 | inform (original_location, "originally specified here"); | |
1047 | return; | |
1048 | } | |
1049 | } | |
668ea4b1 | 1050 | } |
46a88c12 | 1051 | |
ec3e9f82 NP |
1052 | /* If x is not NULL_TREE, we must be in a class extension and we're |
1053 | extending a readonly property. In that case, no point in | |
1054 | searching for another declaration. */ | |
1055 | if (x == NULL_TREE) | |
1056 | { | |
1057 | /* We now need to check for existing property declarations (in | |
1058 | the superclass, other categories or protocols) and check that | |
1059 | the new declaration is not in conflict with existing | |
1060 | ones. */ | |
4ca5d2a7 | 1061 | |
ec3e9f82 NP |
1062 | /* Search for a previous, existing declaration of a property |
1063 | with the same name in superclasses, protocols etc. If one is | |
1064 | found, it will be in the 'x' variable. */ | |
4ca5d2a7 | 1065 | |
ec3e9f82 NP |
1066 | /* Note that, for simplicity, the following may search again the |
1067 | local context. That's Ok as nothing will be found (else we'd | |
1068 | have thrown an error above); it's only a little inefficient, | |
1069 | but the code is simpler. */ | |
1070 | switch (TREE_CODE (objc_interface_context)) | |
4ca5d2a7 | 1071 | { |
ec3e9f82 NP |
1072 | case CLASS_INTERFACE_TYPE: |
1073 | /* Look up the property in the current @interface (which | |
1074 | will find nothing), then its protocols and categories and | |
1075 | superclasses. */ | |
1076 | x = lookup_property (objc_interface_context, DECL_NAME (decl)); | |
1077 | break; | |
1078 | case CATEGORY_INTERFACE_TYPE: | |
1079 | /* Look up the property in the main @interface, then | |
1080 | protocols and categories (one of them is ours, and will | |
1081 | find nothing) and superclasses. */ | |
1082 | x = lookup_property (lookup_interface (CLASS_NAME (objc_interface_context)), | |
1083 | DECL_NAME (decl)); | |
1084 | break; | |
1085 | case PROTOCOL_INTERFACE_TYPE: | |
1086 | /* Looks up the property in any protocols attached to the | |
1087 | current protocol. */ | |
1088 | if (PROTOCOL_LIST (objc_interface_context)) | |
1089 | { | |
1090 | x = lookup_property_in_protocol_list (PROTOCOL_LIST (objc_interface_context), | |
1091 | DECL_NAME (decl)); | |
1092 | } | |
1093 | break; | |
1094 | default: | |
1095 | gcc_unreachable (); | |
4ca5d2a7 | 1096 | } |
4ca5d2a7 NP |
1097 | } |
1098 | ||
1099 | if (x != NULL_TREE) | |
1100 | { | |
1101 | /* An existing property was found; check that it has the same | |
1102 | types, or it is compatible. */ | |
1103 | location_t original_location = DECL_SOURCE_LOCATION (x); | |
2dd24dbd | 1104 | |
4ca5d2a7 NP |
1105 | if (PROPERTY_NONATOMIC (x) != parsed_property_nonatomic) |
1106 | { | |
8926bd5d NP |
1107 | warning_at (location, 0, |
1108 | "'nonatomic' attribute of property %qD conflicts with previous declaration", decl); | |
944fb799 | 1109 | |
4ca5d2a7 NP |
1110 | if (original_location != UNKNOWN_LOCATION) |
1111 | inform (original_location, "originally specified here"); | |
1112 | return; | |
1113 | } | |
1114 | ||
1115 | if (PROPERTY_GETTER_NAME (x) != parsed_property_getter_ident) | |
1116 | { | |
8926bd5d NP |
1117 | warning_at (location, 0, |
1118 | "'getter' attribute of property %qD conflicts with previous declaration", decl); | |
944fb799 | 1119 | |
4ca5d2a7 NP |
1120 | if (original_location != UNKNOWN_LOCATION) |
1121 | inform (original_location, "originally specified here"); | |
1122 | return; | |
1123 | } | |
1124 | ||
1125 | /* We can only compare the setter names if both the old and new property have a setter. */ | |
1126 | if (!property_readonly && !PROPERTY_READONLY(x)) | |
1127 | { | |
1128 | if (PROPERTY_SETTER_NAME (x) != parsed_property_setter_ident) | |
1129 | { | |
8926bd5d NP |
1130 | warning_at (location, 0, |
1131 | "'setter' attribute of property %qD conflicts with previous declaration", decl); | |
944fb799 | 1132 | |
4ca5d2a7 NP |
1133 | if (original_location != UNKNOWN_LOCATION) |
1134 | inform (original_location, "originally specified here"); | |
1135 | return; | |
1136 | } | |
1137 | } | |
1138 | ||
1139 | if (PROPERTY_ASSIGN_SEMANTICS (x) != property_assign_semantics) | |
1140 | { | |
8926bd5d NP |
1141 | warning_at (location, 0, |
1142 | "assign semantics attributes of property %qD conflict with previous declaration", decl); | |
944fb799 | 1143 | |
4ca5d2a7 NP |
1144 | if (original_location != UNKNOWN_LOCATION) |
1145 | inform (original_location, "originally specified here"); | |
1146 | return; | |
1147 | } | |
1148 | ||
1149 | /* It's ok to have a readonly property that becomes a readwrite, but not vice versa. */ | |
1150 | if (PROPERTY_READONLY (x) == 0 && property_readonly == 1) | |
1151 | { | |
8926bd5d NP |
1152 | warning_at (location, 0, |
1153 | "'readonly' attribute of property %qD conflicts with previous declaration", decl); | |
944fb799 | 1154 | |
4ca5d2a7 NP |
1155 | if (original_location != UNKNOWN_LOCATION) |
1156 | inform (original_location, "originally specified here"); | |
1157 | return; | |
1158 | } | |
1159 | ||
10e34e6e NP |
1160 | /* We now check that the new and old property declarations have |
1161 | the same types (or compatible one). In the Objective-C | |
1162 | tradition of loose type checking, we do type-checking but | |
1163 | only generate warnings (not errors) if they do not match. | |
1164 | For non-readonly properties, the types must match exactly; | |
1165 | for readonly properties, it is allowed to use a "more | |
1166 | specialized" type in the new property declaration. Eg, the | |
1167 | superclass has a getter returning (NSArray *) and the | |
1168 | subclass a getter returning (NSMutableArray *). The object's | |
1169 | getter returns an (NSMutableArray *); but if you cast the | |
1170 | object to the superclass, which is allowed, you'd still | |
1171 | expect the getter to return an (NSArray *), which works since | |
1172 | an (NSMutableArray *) is an (NSArray *) too. So, the set of | |
1173 | objects belonging to the type of the new @property should be | |
1174 | a subset of the set of objects belonging to the type of the | |
1175 | old @property. This is what "specialization" means. And the | |
1176 | reason it only applies to readonly properties is that for a | |
1177 | readwrite property the setter would have the opposite | |
1178 | requirement - ie that the superclass type is more specialized | |
1179 | then the subclass one; hence the only way to satisfy both | |
1180 | constraints is that the types match. */ | |
1181 | ||
1182 | /* If the types are not the same in the C sense, we warn ... */ | |
1183 | if (!comptypes (TREE_TYPE (x), TREE_TYPE (decl)) | |
1184 | /* ... unless the property is readonly, in which case we | |
1185 | allow a new, more specialized, declaration. */ | |
944fb799 | 1186 | && (!property_readonly |
10e34e6e NP |
1187 | || !objc_compare_types (TREE_TYPE (x), |
1188 | TREE_TYPE (decl), -5, NULL_TREE))) | |
4ca5d2a7 | 1189 | { |
10e34e6e NP |
1190 | warning_at (location, 0, |
1191 | "type of property %qD conflicts with previous declaration", decl); | |
1192 | if (original_location != UNKNOWN_LOCATION) | |
1193 | inform (original_location, "originally specified here"); | |
1194 | return; | |
4ca5d2a7 | 1195 | } |
ec3e9f82 NP |
1196 | |
1197 | /* If we are in a class extension and we're extending a readonly | |
1198 | property in the main @interface, we'll just update the | |
1199 | existing property with the readwrite flag and potentially the | |
1200 | new setter name. */ | |
1201 | if (property_extension_in_class_extension) | |
1202 | { | |
1203 | PROPERTY_READONLY (x) = 0; | |
1204 | PROPERTY_SETTER_NAME (x) = parsed_property_setter_ident; | |
1205 | return; | |
1206 | } | |
4ca5d2a7 | 1207 | } |
46a88c12 NP |
1208 | |
1209 | /* Create a PROPERTY_DECL node. */ | |
1210 | property_decl = make_node (PROPERTY_DECL); | |
1211 | ||
1212 | /* Copy the basic information from the original decl. */ | |
1213 | TREE_TYPE (property_decl) = TREE_TYPE (decl); | |
1214 | DECL_SOURCE_LOCATION (property_decl) = DECL_SOURCE_LOCATION (decl); | |
1215 | TREE_DEPRECATED (property_decl) = TREE_DEPRECATED (decl); | |
944fb799 | 1216 | |
46a88c12 NP |
1217 | /* Add property-specific information. */ |
1218 | PROPERTY_NAME (property_decl) = DECL_NAME (decl); | |
1219 | PROPERTY_GETTER_NAME (property_decl) = parsed_property_getter_ident; | |
1220 | PROPERTY_SETTER_NAME (property_decl) = parsed_property_setter_ident; | |
1221 | PROPERTY_READONLY (property_decl) = property_readonly; | |
1222 | PROPERTY_NONATOMIC (property_decl) = parsed_property_nonatomic; | |
1223 | PROPERTY_ASSIGN_SEMANTICS (property_decl) = property_assign_semantics; | |
1224 | PROPERTY_IVAR_NAME (property_decl) = NULL_TREE; | |
1225 | PROPERTY_DYNAMIC (property_decl) = 0; | |
1226 | ||
2dd24dbd NP |
1227 | /* Remember the fact that the property was found in the @optional |
1228 | section in a @protocol, or not. */ | |
1229 | if (objc_method_optional_flag) | |
1230 | PROPERTY_OPTIONAL (property_decl) = 1; | |
1231 | else | |
1232 | PROPERTY_OPTIONAL (property_decl) = 0; | |
1233 | ||
4ca5d2a7 NP |
1234 | /* Note that PROPERTY_GETTER_NAME is always set for all |
1235 | PROPERTY_DECLs, and PROPERTY_SETTER_NAME is always set for all | |
1236 | PROPERTY_DECLs where PROPERTY_READONLY == 0. Any time we deal | |
1237 | with a getter or setter, we should get the PROPERTY_DECL and use | |
1238 | PROPERTY_GETTER_NAME and PROPERTY_SETTER_NAME to know the correct | |
1239 | names. */ | |
1240 | ||
46a88c12 NP |
1241 | /* Add the PROPERTY_DECL to the list of properties for the class. */ |
1242 | TREE_CHAIN (property_decl) = CLASS_PROPERTY_DECL (objc_interface_context); | |
1243 | CLASS_PROPERTY_DECL (objc_interface_context) = property_decl; | |
668ea4b1 IS |
1244 | } |
1245 | ||
43236c26 | 1246 | /* This is a subroutine of objc_maybe_build_component_ref. Search the |
a9625a91 NP |
1247 | list of methods in the interface (and, failing that, the local list |
1248 | in the implementation, and failing that, the protocol list) | |
43236c26 NP |
1249 | provided for a 'setter' or 'getter' for 'component' with default |
1250 | names (ie, if 'component' is "name", then search for "name" and | |
2dd24dbd NP |
1251 | "setName:"). It is also possible to specify a different |
1252 | 'getter_name' (this is used for @optional readonly properties). If | |
1253 | any is found, then create an artificial property that uses them. | |
1254 | Return NULL_TREE if 'getter' or 'setter' could not be found. */ | |
43236c26 | 1255 | static tree |
944fb799 | 1256 | maybe_make_artificial_property_decl (tree interface, tree implementation, |
2dd24dbd NP |
1257 | tree protocol_list, tree component, bool is_class, |
1258 | tree getter_name) | |
43236c26 | 1259 | { |
43236c26 NP |
1260 | tree setter_name = get_identifier (objc_build_property_setter_name (component)); |
1261 | tree getter = NULL_TREE; | |
1262 | tree setter = NULL_TREE; | |
1263 | ||
2dd24dbd NP |
1264 | if (getter_name == NULL_TREE) |
1265 | getter_name = component; | |
1266 | ||
a9625a91 | 1267 | /* First, check the @interface and all superclasses. */ |
43236c26 NP |
1268 | if (interface) |
1269 | { | |
1270 | int flags = 0; | |
1271 | ||
a9625a91 NP |
1272 | /* Using instance methods of the root class as accessors is most |
1273 | likely unwanted and can be extremely confusing (and, most | |
1274 | importantly, other Objective-C 2.0 compilers do not do it). | |
1275 | Turn it off. */ | |
43236c26 | 1276 | if (is_class) |
a9625a91 | 1277 | flags = OBJC_LOOKUP_CLASS | OBJC_LOOKUP_NO_INSTANCE_METHODS_OF_ROOT_CLASS; |
944fb799 | 1278 | |
43236c26 NP |
1279 | getter = lookup_method_static (interface, getter_name, flags); |
1280 | setter = lookup_method_static (interface, setter_name, flags); | |
1281 | } | |
1282 | ||
a9625a91 NP |
1283 | /* Second, check the local @implementation context. */ |
1284 | if (!getter && !setter) | |
1285 | { | |
1286 | if (implementation) | |
1287 | { | |
1288 | if (is_class) | |
1289 | { | |
1290 | getter = lookup_method (CLASS_CLS_METHODS (implementation), getter_name); | |
1291 | setter = lookup_method (CLASS_CLS_METHODS (implementation), setter_name); | |
1292 | } | |
1293 | else | |
1294 | { | |
1295 | getter = lookup_method (CLASS_NST_METHODS (implementation), getter_name); | |
944fb799 | 1296 | setter = lookup_method (CLASS_NST_METHODS (implementation), setter_name); |
a9625a91 NP |
1297 | } |
1298 | } | |
1299 | } | |
1300 | ||
1301 | /* Try the protocol_list if we didn't find anything in the | |
1302 | @interface and in the @implementation. */ | |
43236c26 NP |
1303 | if (!getter && !setter) |
1304 | { | |
1305 | getter = lookup_method_in_protocol_list (protocol_list, getter_name, is_class); | |
1306 | setter = lookup_method_in_protocol_list (protocol_list, setter_name, is_class); | |
1307 | } | |
1308 | ||
1309 | /* There needs to be at least a getter or setter for this to be a | |
1310 | valid 'object.component' syntax. */ | |
1311 | if (getter || setter) | |
1312 | { | |
1313 | /* Yes ... determine the type of the expression. */ | |
1314 | tree property_decl; | |
1315 | tree type; | |
944fb799 | 1316 | |
43236c26 NP |
1317 | if (getter) |
1318 | type = TREE_VALUE (TREE_TYPE (getter)); | |
1319 | else | |
1320 | type = TREE_VALUE (TREE_TYPE (METHOD_SEL_ARGS (setter))); | |
944fb799 | 1321 | |
43236c26 NP |
1322 | /* Create an artificial property declaration with the |
1323 | information we collected on the type and getter/setter | |
1324 | names. */ | |
1325 | property_decl = make_node (PROPERTY_DECL); | |
944fb799 | 1326 | |
43236c26 NP |
1327 | TREE_TYPE (property_decl) = type; |
1328 | DECL_SOURCE_LOCATION (property_decl) = input_location; | |
1329 | TREE_DEPRECATED (property_decl) = 0; | |
1330 | DECL_ARTIFICIAL (property_decl) = 1; | |
b4f588c4 | 1331 | |
43236c26 NP |
1332 | /* Add property-specific information. Note that one of |
1333 | PROPERTY_GETTER_NAME or PROPERTY_SETTER_NAME may refer to a | |
1334 | non-existing method; this will generate an error when the | |
1335 | expression is later compiled. At this stage we don't know if | |
1336 | the getter or setter will be used, so we can't generate an | |
1337 | error. */ | |
1338 | PROPERTY_NAME (property_decl) = component; | |
1339 | PROPERTY_GETTER_NAME (property_decl) = getter_name; | |
1340 | PROPERTY_SETTER_NAME (property_decl) = setter_name; | |
1341 | PROPERTY_READONLY (property_decl) = 0; | |
1342 | PROPERTY_NONATOMIC (property_decl) = 0; | |
1343 | PROPERTY_ASSIGN_SEMANTICS (property_decl) = 0; | |
1344 | PROPERTY_IVAR_NAME (property_decl) = NULL_TREE; | |
1345 | PROPERTY_DYNAMIC (property_decl) = 0; | |
2dd24dbd | 1346 | PROPERTY_OPTIONAL (property_decl) = 0; |
43236c26 NP |
1347 | |
1348 | if (!getter) | |
1349 | PROPERTY_HAS_NO_GETTER (property_decl) = 1; | |
1350 | ||
1351 | /* The following is currently unused, but it's nice to have | |
1352 | there. We may use it if we need in the future. */ | |
1353 | if (!setter) | |
1354 | PROPERTY_HAS_NO_SETTER (property_decl) = 1; | |
1355 | ||
1356 | return property_decl; | |
1357 | } | |
1358 | ||
1359 | return NULL_TREE; | |
1360 | } | |
668ea4b1 | 1361 | |
46a88c12 NP |
1362 | /* This hook routine is invoked by the parser when an expression such |
1363 | as 'xxx.yyy' is parsed. We get a chance to process these | |
1364 | expressions in a way that is specified to Objective-C (to implement | |
43236c26 NP |
1365 | the Objective-C 2.0 dot-syntax, properties, or non-fragile ivars). |
1366 | If the expression is not an Objective-C specified expression, we | |
1367 | should return NULL_TREE; else we return the expression. | |
1368 | ||
1369 | At the moment this only implements dot-syntax and properties (not | |
1370 | non-fragile ivars yet), ie 'object.property' or 'object.component' | |
1371 | where 'component' is not a declared property, but a valid getter or | |
1372 | setter for it could be found. */ | |
668ea4b1 | 1373 | tree |
46a88c12 | 1374 | objc_maybe_build_component_ref (tree object, tree property_ident) |
668ea4b1 IS |
1375 | { |
1376 | tree x = NULL_TREE; | |
1377 | tree rtype; | |
1378 | ||
a9625a91 NP |
1379 | /* If we are in Objective-C 1.0 mode, dot-syntax and properties are |
1380 | not available. */ | |
22d8d616 NP |
1381 | if (flag_objc1_only) |
1382 | return NULL_TREE; | |
1383 | ||
a9625a91 NP |
1384 | /* Try to determine if 'object' is an Objective-C object or not. If |
1385 | not, return. */ | |
944fb799 | 1386 | if (object == NULL_TREE || object == error_mark_node |
46a88c12 | 1387 | || (rtype = TREE_TYPE (object)) == NULL_TREE) |
668ea4b1 | 1388 | return NULL_TREE; |
944fb799 | 1389 | |
46a88c12 NP |
1390 | if (property_ident == NULL_TREE || property_ident == error_mark_node |
1391 | || TREE_CODE (property_ident) != IDENTIFIER_NODE) | |
668ea4b1 IS |
1392 | return NULL_TREE; |
1393 | ||
a9625a91 NP |
1394 | /* The following analysis of 'object' is similar to the one used for |
1395 | the 'receiver' of a method invocation. We need to determine what | |
1396 | 'object' is and find the appropriate property (either declared, | |
1397 | or artificial) for it (in the same way as we need to find the | |
1398 | appropriate method prototype for a method invocation). There are | |
1399 | some simplifications here though: "object.property" is invalid if | |
1400 | "object" has a type of "id" or "Class"; it must at least have a | |
1401 | protocol attached to it, and "object" is never a class name as | |
1402 | that is done by objc_build_class_component_ref. Finally, we | |
1403 | don't know if this really is a dot-syntax expression, so we want | |
1404 | to make a quick exit if it is not; for this reason, we try to | |
1405 | postpone checks after determining that 'object' looks like an | |
1406 | Objective-C object. */ | |
1407 | ||
668ea4b1 IS |
1408 | if (objc_is_id (rtype)) |
1409 | { | |
a9625a91 NP |
1410 | /* This is the case that the 'object' is of type 'id' or |
1411 | 'Class'. */ | |
43236c26 | 1412 | |
a9625a91 NP |
1413 | /* Check if at least it is of type 'id <Protocol>' or 'Class |
1414 | <Protocol>'; if so, look the property up in the | |
1415 | protocols. */ | |
1416 | if (TYPE_HAS_OBJC_INFO (TREE_TYPE (rtype))) | |
43236c26 | 1417 | { |
a9625a91 | 1418 | tree rprotos = TYPE_OBJC_PROTOCOL_LIST (TREE_TYPE (rtype)); |
944fb799 | 1419 | |
a9625a91 NP |
1420 | if (rprotos) |
1421 | { | |
1422 | /* No point looking up declared @properties if we are | |
1423 | dealing with a class. Classes have no declared | |
1424 | properties. */ | |
1425 | if (!IS_CLASS (rtype)) | |
1426 | x = lookup_property_in_protocol_list (rprotos, property_ident); | |
2dd24dbd | 1427 | |
a9625a91 NP |
1428 | if (x == NULL_TREE) |
1429 | { | |
1430 | /* Ok, no property. Maybe it was an | |
1431 | object.component dot-syntax without a declared | |
1432 | property (this is valid for classes too). Look | |
1433 | for getter/setter methods and internally declare | |
1434 | an artifical property based on them if found. */ | |
1435 | x = maybe_make_artificial_property_decl (NULL_TREE, | |
1436 | NULL_TREE, | |
944fb799 | 1437 | rprotos, |
a9625a91 | 1438 | property_ident, |
2dd24dbd NP |
1439 | IS_CLASS (rtype), |
1440 | NULL_TREE); | |
1441 | } | |
1442 | else if (PROPERTY_OPTIONAL (x) && PROPERTY_READONLY (x)) | |
1443 | { | |
1444 | /* This is a special, complicated case. If the | |
1445 | property is optional, and is read-only, then the | |
1446 | property is always used for reading, but an | |
1447 | eventual existing non-property setter can be used | |
1448 | for writing. We create an artificial property | |
1449 | decl copying the getter from the optional | |
1450 | property, and looking up the setter in the | |
1451 | interface. */ | |
1452 | x = maybe_make_artificial_property_decl (NULL_TREE, | |
1453 | NULL_TREE, | |
1454 | rprotos, | |
1455 | property_ident, | |
1456 | false, | |
944fb799 | 1457 | PROPERTY_GETTER_NAME (x)); |
a9625a91 NP |
1458 | } |
1459 | } | |
1460 | } | |
1461 | else if (objc_method_context) | |
1462 | { | |
1463 | /* Else, if we are inside a method it could be the case of | |
1464 | 'super' or 'self'. */ | |
1465 | tree interface_type = NULL_TREE; | |
1466 | tree t = object; | |
1467 | while (TREE_CODE (t) == COMPOUND_EXPR | |
1468 | || TREE_CODE (t) == MODIFY_EXPR | |
1469 | || CONVERT_EXPR_P (t) | |
1470 | || TREE_CODE (t) == COMPONENT_REF) | |
1471 | t = TREE_OPERAND (t, 0); | |
944fb799 MS |
1472 | |
1473 | if (t == UOBJC_SUPER_decl) | |
d402edc1 | 1474 | interface_type = lookup_interface (CLASS_SUPER_NAME (implementation_template)); |
a9625a91 NP |
1475 | else if (t == self_decl) |
1476 | interface_type = lookup_interface (CLASS_NAME (implementation_template)); | |
1477 | ||
a9625a91 NP |
1478 | if (interface_type) |
1479 | { | |
1480 | if (TREE_CODE (objc_method_context) != CLASS_METHOD_DECL) | |
10e34e6e | 1481 | x = lookup_property (interface_type, property_ident); |
944fb799 | 1482 | |
a9625a91 NP |
1483 | if (x == NULL_TREE) |
1484 | { | |
1485 | /* Try the dot-syntax without a declared property. | |
1486 | If this is an access to 'self', it is possible | |
1487 | that they may refer to a setter/getter that is | |
1488 | not declared in the interface, but exists locally | |
1489 | in the implementation. In that case, get the | |
1490 | implementation context and use it. */ | |
1491 | tree implementation = NULL_TREE; | |
1492 | ||
1493 | if (t == self_decl) | |
1494 | implementation = objc_implementation_context; | |
944fb799 MS |
1495 | |
1496 | x = maybe_make_artificial_property_decl | |
a9625a91 NP |
1497 | (interface_type, implementation, NULL_TREE, |
1498 | property_ident, | |
2dd24dbd NP |
1499 | (TREE_CODE (objc_method_context) == CLASS_METHOD_DECL), |
1500 | NULL_TREE); | |
1501 | } | |
1502 | else if (PROPERTY_OPTIONAL (x) && PROPERTY_READONLY (x)) | |
1503 | { | |
1504 | tree implementation = NULL_TREE; | |
944fb799 | 1505 | |
2dd24dbd NP |
1506 | if (t == self_decl) |
1507 | implementation = objc_implementation_context; | |
944fb799 | 1508 | |
2dd24dbd NP |
1509 | x = maybe_make_artificial_property_decl (interface_type, |
1510 | implementation, | |
1511 | NULL_TREE, | |
1512 | property_ident, | |
1513 | false, | |
944fb799 | 1514 | PROPERTY_GETTER_NAME (x)); |
a9625a91 NP |
1515 | } |
1516 | } | |
43236c26 | 1517 | } |
668ea4b1 IS |
1518 | } |
1519 | else | |
1520 | { | |
a9625a91 | 1521 | /* This is the case where we have more information on 'rtype'. */ |
668ea4b1 IS |
1522 | tree basetype = TYPE_MAIN_VARIANT (rtype); |
1523 | ||
a9625a91 NP |
1524 | /* Skip the pointer - if none, it's not an Objective-C object or |
1525 | class. */ | |
668ea4b1 IS |
1526 | if (basetype != NULL_TREE && TREE_CODE (basetype) == POINTER_TYPE) |
1527 | basetype = TREE_TYPE (basetype); | |
1528 | else | |
1529 | return NULL_TREE; | |
1530 | ||
a9625a91 | 1531 | /* Traverse typedefs. */ |
668ea4b1 | 1532 | while (basetype != NULL_TREE |
944fb799 | 1533 | && TREE_CODE (basetype) == RECORD_TYPE |
668ea4b1 IS |
1534 | && OBJC_TYPE_NAME (basetype) |
1535 | && TREE_CODE (OBJC_TYPE_NAME (basetype)) == TYPE_DECL | |
1536 | && DECL_ORIGINAL_TYPE (OBJC_TYPE_NAME (basetype))) | |
1537 | basetype = DECL_ORIGINAL_TYPE (OBJC_TYPE_NAME (basetype)); | |
1538 | ||
1539 | if (basetype != NULL_TREE && TYPED_OBJECT (basetype)) | |
1540 | { | |
1541 | tree interface_type = TYPE_OBJC_INTERFACE (basetype); | |
46a88c12 | 1542 | tree protocol_list = TYPE_OBJC_PROTOCOL_LIST (basetype); |
43236c26 | 1543 | |
944fb799 | 1544 | if (interface_type |
a9625a91 NP |
1545 | && (TREE_CODE (interface_type) == CLASS_INTERFACE_TYPE |
1546 | || TREE_CODE (interface_type) == CATEGORY_INTERFACE_TYPE | |
1547 | || TREE_CODE (interface_type) == PROTOCOL_INTERFACE_TYPE)) | |
43236c26 | 1548 | { |
a9625a91 NP |
1549 | /* Not sure 'rtype' could ever be a class here! Just |
1550 | for safety we keep the checks. */ | |
1551 | if (!IS_CLASS (rtype)) | |
1552 | { | |
1553 | x = lookup_property (interface_type, property_ident); | |
944fb799 | 1554 | |
a9625a91 | 1555 | if (x == NULL_TREE) |
944fb799 | 1556 | x = lookup_property_in_protocol_list (protocol_list, |
a9625a91 NP |
1557 | property_ident); |
1558 | } | |
944fb799 | 1559 | |
a9625a91 NP |
1560 | if (x == NULL_TREE) |
1561 | { | |
1562 | /* Try the dot-syntax without a declared property. | |
1563 | If we are inside a method implementation, it is | |
1564 | possible that they may refer to a setter/getter | |
1565 | that is not declared in the interface, but exists | |
1566 | locally in the implementation. In that case, get | |
1567 | the implementation context and use it. */ | |
1568 | tree implementation = NULL_TREE; | |
1569 | ||
1570 | if (objc_implementation_context | |
944fb799 | 1571 | && CLASS_NAME (objc_implementation_context) |
a9625a91 NP |
1572 | == OBJC_TYPE_NAME (interface_type)) |
1573 | implementation = objc_implementation_context; | |
944fb799 | 1574 | |
a9625a91 NP |
1575 | x = maybe_make_artificial_property_decl (interface_type, |
1576 | implementation, | |
944fb799 | 1577 | protocol_list, |
a9625a91 | 1578 | property_ident, |
2dd24dbd NP |
1579 | IS_CLASS (rtype), |
1580 | NULL_TREE); | |
a9625a91 | 1581 | } |
2dd24dbd NP |
1582 | else if (PROPERTY_OPTIONAL (x) && PROPERTY_READONLY (x)) |
1583 | { | |
1584 | tree implementation = NULL_TREE; | |
1585 | ||
1586 | if (objc_implementation_context | |
944fb799 | 1587 | && CLASS_NAME (objc_implementation_context) |
2dd24dbd NP |
1588 | == OBJC_TYPE_NAME (interface_type)) |
1589 | implementation = objc_implementation_context; | |
944fb799 | 1590 | |
2dd24dbd NP |
1591 | x = maybe_make_artificial_property_decl (interface_type, |
1592 | implementation, | |
1593 | protocol_list, | |
1594 | property_ident, | |
1595 | false, | |
944fb799 MS |
1596 | PROPERTY_GETTER_NAME (x)); |
1597 | } | |
43236c26 | 1598 | } |
668ea4b1 IS |
1599 | } |
1600 | } | |
1601 | ||
1602 | if (x) | |
1603 | { | |
46a88c12 | 1604 | tree expression; |
a9625a91 | 1605 | tree getter_call; |
b4f588c4 | 1606 | tree deprecated_method_prototype = NULL_TREE; |
46a88c12 NP |
1607 | |
1608 | /* We have an additional nasty problem here; if this | |
1609 | PROPERTY_REF needs to become a 'getter', then the conversion | |
1610 | from PROPERTY_REF into a getter call happens in gimplify, | |
a9625a91 NP |
1611 | after the selector table has already been generated and when |
1612 | it is too late to add another selector to it. To work around | |
1613 | the problem, we always create the getter call at this stage, | |
1614 | which puts the selector in the table. Note that if the | |
1615 | PROPERTY_REF becomes a 'setter' instead of a 'getter', then | |
1616 | we have added a selector too many to the selector table. | |
1617 | This is a little inefficient. | |
1618 | ||
1619 | Also note that method calls to 'self' and 'super' require the | |
1620 | context (self_decl, UOBJS_SUPER_decl, | |
1621 | objc_implementation_context etc) to be built correctly; this | |
1622 | is yet another reason why building the call at the gimplify | |
1623 | stage (when this context has been lost) is not very | |
1624 | practical. If we build it at this stage, we know it will | |
1625 | always be built correctly. | |
43236c26 NP |
1626 | |
1627 | If the PROPERTY_HAS_NO_GETTER() (ie, it is an artificial | |
1628 | property decl created to deal with a dotsyntax not really | |
1629 | referring to an existing property) then do not try to build a | |
1630 | call to the getter as there is no getter. */ | |
a9625a91 NP |
1631 | if (PROPERTY_HAS_NO_GETTER (x)) |
1632 | getter_call = NULL_TREE; | |
1633 | else | |
b4f588c4 NP |
1634 | getter_call = objc_finish_message_expr |
1635 | (object, PROPERTY_GETTER_NAME (x), NULL_TREE, | |
1636 | /* Disable the immediate deprecation warning if the getter | |
1637 | is deprecated, but record the fact that the getter is | |
1638 | deprecated by setting PROPERTY_REF_DEPRECATED_GETTER to | |
1639 | the method prototype. */ | |
1640 | &deprecated_method_prototype); | |
1641 | ||
1642 | expression = build4 (PROPERTY_REF, TREE_TYPE(x), object, x, getter_call, | |
1643 | deprecated_method_prototype); | |
a9625a91 NP |
1644 | SET_EXPR_LOCATION (expression, input_location); |
1645 | TREE_SIDE_EFFECTS (expression) = 1; | |
944fb799 | 1646 | |
46a88c12 | 1647 | return expression; |
668ea4b1 | 1648 | } |
668ea4b1 | 1649 | |
46a88c12 | 1650 | return NULL_TREE; |
668ea4b1 IS |
1651 | } |
1652 | ||
bede2adc NP |
1653 | /* This hook routine is invoked by the parser when an expression such |
1654 | as 'xxx.yyy' is parsed, and 'xxx' is a class name. This is the | |
1655 | Objective-C 2.0 dot-syntax applied to classes, so we need to | |
1656 | convert it into a setter/getter call on the class. */ | |
1657 | tree | |
1658 | objc_build_class_component_ref (tree class_name, tree property_ident) | |
1659 | { | |
1660 | tree x = NULL_TREE; | |
1661 | tree object, rtype; | |
944fb799 | 1662 | |
bede2adc NP |
1663 | if (flag_objc1_only) |
1664 | error_at (input_location, "the dot syntax is not available in Objective-C 1.0"); | |
944fb799 | 1665 | |
bede2adc NP |
1666 | if (class_name == NULL_TREE || class_name == error_mark_node |
1667 | || TREE_CODE (class_name) != IDENTIFIER_NODE) | |
1668 | return error_mark_node; | |
944fb799 | 1669 | |
bede2adc NP |
1670 | if (property_ident == NULL_TREE || property_ident == error_mark_node |
1671 | || TREE_CODE (property_ident) != IDENTIFIER_NODE) | |
1672 | return NULL_TREE; | |
944fb799 | 1673 | |
bede2adc NP |
1674 | object = objc_get_class_reference (class_name); |
1675 | if (!object) | |
1676 | { | |
1677 | /* We know that 'class_name' is an Objective-C class name as the | |
1678 | parser won't call this function if it is not. This is only a | |
1679 | double-check for safety. */ | |
944fb799 | 1680 | error_at (input_location, "could not find class %qE", class_name); |
bede2adc NP |
1681 | return error_mark_node; |
1682 | } | |
1683 | ||
1684 | rtype = lookup_interface (class_name); | |
1685 | if (!rtype) | |
1686 | { | |
1687 | /* Again, this should never happen, but we do check. */ | |
944fb799 | 1688 | error_at (input_location, "could not find interface for class %qE", class_name); |
bede2adc NP |
1689 | return error_mark_node; |
1690 | } | |
d4e72c58 NP |
1691 | else |
1692 | { | |
1693 | if (TREE_DEPRECATED (rtype)) | |
944fb799 | 1694 | warning (OPT_Wdeprecated_declarations, "class %qE is deprecated", class_name); |
d4e72c58 | 1695 | } |
bede2adc | 1696 | |
a9625a91 | 1697 | x = maybe_make_artificial_property_decl (rtype, NULL_TREE, NULL_TREE, |
bede2adc | 1698 | property_ident, |
2dd24dbd | 1699 | true, NULL_TREE); |
944fb799 | 1700 | |
bede2adc NP |
1701 | if (x) |
1702 | { | |
1703 | tree expression; | |
a9625a91 | 1704 | tree getter_call; |
b4f588c4 | 1705 | tree deprecated_method_prototype = NULL_TREE; |
bede2adc | 1706 | |
a9625a91 NP |
1707 | if (PROPERTY_HAS_NO_GETTER (x)) |
1708 | getter_call = NULL_TREE; | |
1709 | else | |
b4f588c4 NP |
1710 | getter_call = objc_finish_message_expr |
1711 | (object, PROPERTY_GETTER_NAME (x), NULL_TREE, | |
1712 | &deprecated_method_prototype); | |
bede2adc | 1713 | |
b4f588c4 NP |
1714 | expression = build4 (PROPERTY_REF, TREE_TYPE(x), object, x, getter_call, |
1715 | deprecated_method_prototype); | |
bede2adc NP |
1716 | SET_EXPR_LOCATION (expression, input_location); |
1717 | TREE_SIDE_EFFECTS (expression) = 1; | |
a9625a91 | 1718 | |
bede2adc NP |
1719 | return expression; |
1720 | } | |
1721 | else | |
1722 | { | |
944fb799 MS |
1723 | error_at (input_location, "could not find setter/getter for %qE in class %qE", |
1724 | property_ident, class_name); | |
bede2adc NP |
1725 | return error_mark_node; |
1726 | } | |
1727 | ||
1728 | return NULL_TREE; | |
1729 | } | |
1730 | ||
1731 | ||
1732 | ||
46a88c12 NP |
1733 | /* This is used because we don't want to expose PROPERTY_REF to the |
1734 | C/C++ frontends. Maybe we should! */ | |
1735 | bool | |
1736 | objc_is_property_ref (tree node) | |
668ea4b1 | 1737 | { |
46a88c12 NP |
1738 | if (node && TREE_CODE (node) == PROPERTY_REF) |
1739 | return true; | |
668ea4b1 | 1740 | else |
46a88c12 | 1741 | return false; |
668ea4b1 IS |
1742 | } |
1743 | ||
b6cfe8ac NP |
1744 | /* This function builds a setter call for a PROPERTY_REF (real, for a |
1745 | declared property, or artificial, for a dot-syntax accessor which | |
1746 | is not corresponding to a property). 'lhs' must be a PROPERTY_REF | |
1747 | (the caller must check this beforehand). 'rhs' is the value to | |
1748 | assign to the property. A plain setter call is returned, or | |
1749 | error_mark_node if the property is readonly. */ | |
1750 | ||
1751 | static tree | |
1752 | objc_build_setter_call (tree lhs, tree rhs) | |
1753 | { | |
1754 | tree object_expr = PROPERTY_REF_OBJECT (lhs); | |
1755 | tree property_decl = PROPERTY_REF_PROPERTY_DECL (lhs); | |
944fb799 | 1756 | |
b6cfe8ac NP |
1757 | if (PROPERTY_READONLY (property_decl)) |
1758 | { | |
944fb799 | 1759 | error ("readonly property can not be set"); |
b6cfe8ac NP |
1760 | return error_mark_node; |
1761 | } | |
1762 | else | |
1763 | { | |
1764 | tree setter_argument = build_tree_list (NULL_TREE, rhs); | |
1765 | tree setter; | |
944fb799 | 1766 | |
b6cfe8ac NP |
1767 | /* TODO: Check that the setter return type is 'void'. */ |
1768 | ||
1769 | /* TODO: Decay arguments in C. */ | |
944fb799 | 1770 | setter = objc_finish_message_expr (object_expr, |
b6cfe8ac | 1771 | PROPERTY_SETTER_NAME (property_decl), |
b4f588c4 | 1772 | setter_argument, NULL); |
b6cfe8ac NP |
1773 | return setter; |
1774 | } | |
1775 | ||
1776 | /* Unreachable, but the compiler may not realize. */ | |
1777 | return error_mark_node; | |
1778 | } | |
1779 | ||
46a88c12 NP |
1780 | /* This hook routine is called when a MODIFY_EXPR is being built. We |
1781 | check what is being modified; if it is a PROPERTY_REF, we need to | |
1782 | generate a 'setter' function call for the property. If this is not | |
1783 | a PROPERTY_REF, we return NULL_TREE and the C/C++ frontend will go | |
1784 | on creating their MODIFY_EXPR. | |
668ea4b1 | 1785 | |
46a88c12 | 1786 | This is used for example if you write |
668ea4b1 | 1787 | |
46a88c12 | 1788 | object.count = 1; |
668ea4b1 | 1789 | |
46a88c12 NP |
1790 | where 'count' is a property. The left-hand side creates a |
1791 | PROPERTY_REF, and then the compiler tries to generate a MODIFY_EXPR | |
1792 | to assign something to it. We intercept that here, and generate a | |
1793 | call to the 'setter' method instead. */ | |
1794 | tree | |
1795 | objc_maybe_build_modify_expr (tree lhs, tree rhs) | |
668ea4b1 | 1796 | { |
46a88c12 | 1797 | if (lhs && TREE_CODE (lhs) == PROPERTY_REF) |
668ea4b1 | 1798 | { |
b6cfe8ac | 1799 | /* Building a simple call to the setter method would work for cases such as |
668ea4b1 | 1800 | |
b6cfe8ac | 1801 | object.count = 1; |
43236c26 | 1802 | |
b6cfe8ac | 1803 | but wouldn't work for cases such as |
43236c26 | 1804 | |
b6cfe8ac NP |
1805 | count = object2.count = 1; |
1806 | ||
1807 | to get these to work with very little effort, we build a | |
1808 | compound statement which does the setter call (to set the | |
1809 | property to 'rhs'), but which can also be evaluated returning | |
3890ce93 NP |
1810 | the 'rhs'. If the 'rhs' has no side effects, we can simply |
1811 | evaluate it twice, building | |
1812 | ||
1813 | ([object setProperty: rhs]; rhs) | |
1814 | ||
1815 | If it has side effects, we put it in a temporary variable first, | |
1816 | so we create the following: | |
b6cfe8ac NP |
1817 | |
1818 | (temp = rhs; [object setProperty: temp]; temp) | |
3890ce93 NP |
1819 | |
1820 | setter_argument is rhs in the first case, and temp in the second | |
1821 | case. | |
b6cfe8ac | 1822 | */ |
3890ce93 NP |
1823 | tree setter_argument; |
1824 | ||
b6cfe8ac NP |
1825 | /* s1, s2 and s3 are the tree statements that we need in the |
1826 | compound expression. */ | |
1827 | tree s1, s2, s3, compound_expr; | |
3890ce93 NP |
1828 | |
1829 | if (TREE_SIDE_EFFECTS (rhs)) | |
1830 | { | |
1831 | tree bind; | |
944fb799 | 1832 | |
3890ce93 NP |
1833 | /* Declare __objc_property_temp in a local bind. */ |
1834 | setter_argument = objc_create_temporary_var (TREE_TYPE (rhs), "__objc_property_temp"); | |
1835 | DECL_SOURCE_LOCATION (setter_argument) = input_location; | |
1836 | bind = build3 (BIND_EXPR, void_type_node, setter_argument, NULL, NULL); | |
1837 | SET_EXPR_LOCATION (bind, input_location); | |
1838 | TREE_SIDE_EFFECTS (bind) = 1; | |
1839 | add_stmt (bind); | |
1840 | ||
1841 | /* s1: x = rhs */ | |
1842 | s1 = build_modify_expr (input_location, setter_argument, NULL_TREE, | |
1843 | NOP_EXPR, | |
1844 | input_location, rhs, NULL_TREE); | |
1845 | SET_EXPR_LOCATION (s1, input_location); | |
1846 | } | |
1847 | else | |
1848 | { | |
1849 | /* No s1. */ | |
1850 | setter_argument = rhs; | |
1851 | s1 = NULL_TREE; | |
1852 | } | |
944fb799 | 1853 | |
b6cfe8ac | 1854 | /* Now build the compound statement. */ |
944fb799 | 1855 | |
3890ce93 NP |
1856 | /* s2: [object setProperty: x] */ |
1857 | s2 = objc_build_setter_call (lhs, setter_argument); | |
944fb799 | 1858 | |
3890ce93 NP |
1859 | /* This happens if building the setter failed because the |
1860 | property is readonly. */ | |
b6cfe8ac NP |
1861 | if (s2 == error_mark_node) |
1862 | return error_mark_node; | |
1863 | ||
1864 | SET_EXPR_LOCATION (s2, input_location); | |
944fb799 | 1865 | |
3890ce93 NP |
1866 | /* s3: x */ |
1867 | s3 = convert (TREE_TYPE (lhs), setter_argument); | |
b6cfe8ac | 1868 | |
3890ce93 NP |
1869 | /* Now build the compound statement (s1, s2, s3) or (s2, s3) as |
1870 | appropriate. */ | |
1871 | if (s1) | |
1872 | compound_expr = build_compound_expr (input_location, build_compound_expr (input_location, s1, s2), s3); | |
1873 | else | |
944fb799 | 1874 | compound_expr = build_compound_expr (input_location, s2, s3); |
b6cfe8ac NP |
1875 | |
1876 | /* Without this, with -Wall you get a 'valued computed is not | |
1877 | used' every time there is a "object.property = x" where the | |
1878 | value of the resulting MODIFY_EXPR is not used. That is | |
1879 | correct (maybe a more sophisticated implementation could | |
1880 | avoid generating the compound expression if not needed), but | |
1881 | we need to turn it off. */ | |
1882 | TREE_NO_WARNING (compound_expr) = 1; | |
1883 | return compound_expr; | |
46a88c12 NP |
1884 | } |
1885 | else | |
1886 | return NULL_TREE; | |
668ea4b1 IS |
1887 | } |
1888 | ||
925e8657 NP |
1889 | /* This hook is called by the frontend when one of the four unary |
1890 | expressions PREINCREMENT_EXPR, POSTINCREMENT_EXPR, | |
1891 | PREDECREMENT_EXPR and POSTDECREMENT_EXPR is being built with an | |
1892 | argument which is a PROPERTY_REF. For example, this happens if you have | |
1893 | ||
1894 | object.count++; | |
1895 | ||
1896 | where 'count' is a property. We need to use the 'getter' and | |
1897 | 'setter' for the property in an appropriate way to build the | |
1898 | appropriate expression. 'code' is the code for the expression (one | |
1899 | of the four mentioned above); 'argument' is the PROPERTY_REF, and | |
944fb799 | 1900 | 'increment' is how much we need to add or subtract. */ |
925e8657 NP |
1901 | tree |
1902 | objc_build_incr_expr_for_property_ref (location_t location, | |
944fb799 | 1903 | enum tree_code code, |
925e8657 NP |
1904 | tree argument, tree increment) |
1905 | { | |
1906 | /* Here are the expressions that we want to build: | |
1907 | ||
1908 | For PREINCREMENT_EXPR / PREDECREMENT_EXPR: | |
1909 | (temp = [object property] +/- increment, [object setProperty: temp], temp) | |
944fb799 | 1910 | |
925e8657 NP |
1911 | For POSTINCREMENT_EXPR / POSTECREMENT_EXPR: |
1912 | (temp = [object property], [object setProperty: temp +/- increment], temp) */ | |
944fb799 | 1913 | |
925e8657 NP |
1914 | tree temp_variable_decl, bind; |
1915 | /* s1, s2 and s3 are the tree statements that we need in the | |
1916 | compound expression. */ | |
b6cfe8ac | 1917 | tree s1, s2, s3, compound_expr; |
944fb799 | 1918 | |
925e8657 NP |
1919 | /* Safety check. */ |
1920 | if (!argument || TREE_CODE (argument) != PROPERTY_REF) | |
1921 | return error_mark_node; | |
1922 | ||
1923 | /* Declare __objc_property_temp in a local bind. */ | |
1924 | temp_variable_decl = objc_create_temporary_var (TREE_TYPE (argument), "__objc_property_temp"); | |
1925 | DECL_SOURCE_LOCATION (temp_variable_decl) = location; | |
1926 | bind = build3 (BIND_EXPR, void_type_node, temp_variable_decl, NULL, NULL); | |
1927 | SET_EXPR_LOCATION (bind, location); | |
1928 | TREE_SIDE_EFFECTS (bind) = 1; | |
1929 | add_stmt (bind); | |
944fb799 | 1930 | |
925e8657 | 1931 | /* Now build the compound statement. */ |
944fb799 | 1932 | |
925e8657 NP |
1933 | /* Note that the 'getter' is generated at gimplify time; at this |
1934 | time, we can simply put the property_ref (ie, argument) wherever | |
1935 | we want the getter ultimately to be. */ | |
944fb799 | 1936 | |
925e8657 NP |
1937 | /* s1: __objc_property_temp = [object property] <+/- increment> */ |
1938 | switch (code) | |
1939 | { | |
944fb799 | 1940 | case PREINCREMENT_EXPR: |
925e8657 | 1941 | /* __objc_property_temp = [object property] + increment */ |
b6cfe8ac NP |
1942 | s1 = build_modify_expr (location, temp_variable_decl, NULL_TREE, |
1943 | NOP_EXPR, | |
944fb799 | 1944 | location, build2 (PLUS_EXPR, TREE_TYPE (argument), |
b6cfe8ac | 1945 | argument, increment), NULL_TREE); |
925e8657 NP |
1946 | break; |
1947 | case PREDECREMENT_EXPR: | |
1948 | /* __objc_property_temp = [object property] - increment */ | |
b6cfe8ac NP |
1949 | s1 = build_modify_expr (location, temp_variable_decl, NULL_TREE, |
1950 | NOP_EXPR, | |
944fb799 | 1951 | location, build2 (MINUS_EXPR, TREE_TYPE (argument), |
b6cfe8ac | 1952 | argument, increment), NULL_TREE); |
925e8657 NP |
1953 | break; |
1954 | case POSTINCREMENT_EXPR: | |
1955 | case POSTDECREMENT_EXPR: | |
1956 | /* __objc_property_temp = [object property] */ | |
b6cfe8ac NP |
1957 | s1 = build_modify_expr (location, temp_variable_decl, NULL_TREE, |
1958 | NOP_EXPR, | |
1959 | location, argument, NULL_TREE); | |
925e8657 NP |
1960 | break; |
1961 | default: | |
1962 | gcc_unreachable (); | |
1963 | } | |
944fb799 | 1964 | |
925e8657 NP |
1965 | /* s2: [object setProperty: __objc_property_temp <+/- increment>] */ |
1966 | switch (code) | |
1967 | { | |
944fb799 | 1968 | case PREINCREMENT_EXPR: |
925e8657 NP |
1969 | case PREDECREMENT_EXPR: |
1970 | /* [object setProperty: __objc_property_temp] */ | |
b6cfe8ac | 1971 | s2 = objc_build_setter_call (argument, temp_variable_decl); |
925e8657 NP |
1972 | break; |
1973 | case POSTINCREMENT_EXPR: | |
1974 | /* [object setProperty: __objc_property_temp + increment] */ | |
b6cfe8ac | 1975 | s2 = objc_build_setter_call (argument, |
944fb799 | 1976 | build2 (PLUS_EXPR, TREE_TYPE (argument), |
b6cfe8ac | 1977 | temp_variable_decl, increment)); |
925e8657 NP |
1978 | break; |
1979 | case POSTDECREMENT_EXPR: | |
1980 | /* [object setProperty: __objc_property_temp - increment] */ | |
b6cfe8ac | 1981 | s2 = objc_build_setter_call (argument, |
944fb799 | 1982 | build2 (MINUS_EXPR, TREE_TYPE (argument), |
b6cfe8ac | 1983 | temp_variable_decl, increment)); |
925e8657 NP |
1984 | break; |
1985 | default: | |
1986 | gcc_unreachable (); | |
1987 | } | |
1988 | ||
1989 | /* This happens if building the setter failed because the property | |
1990 | is readonly. */ | |
1991 | if (s2 == error_mark_node) | |
1992 | return error_mark_node; | |
1993 | ||
944fb799 MS |
1994 | SET_EXPR_LOCATION (s2, location); |
1995 | ||
925e8657 | 1996 | /* s3: __objc_property_temp */ |
b6cfe8ac | 1997 | s3 = convert (TREE_TYPE (argument), temp_variable_decl); |
944fb799 | 1998 | |
925e8657 | 1999 | /* Now build the compound statement (s1, s2, s3) */ |
b6cfe8ac NP |
2000 | compound_expr = build_compound_expr (location, build_compound_expr (location, s1, s2), s3); |
2001 | ||
2002 | /* Prevent C++ from warning with -Wall that "right operand of comma | |
2003 | operator has no effect". */ | |
2004 | TREE_NO_WARNING (compound_expr) = 1; | |
2005 | return compound_expr; | |
925e8657 NP |
2006 | } |
2007 | ||
6408ef33 | 2008 | tree |
249a82c4 | 2009 | objc_build_method_signature (bool is_class_method, tree rettype, tree selector, |
dbb74365 | 2010 | tree optparms, bool ellipsis) |
6408ef33 | 2011 | { |
249a82c4 NP |
2012 | if (is_class_method) |
2013 | return build_method_decl (CLASS_METHOD_DECL, rettype, selector, | |
2014 | optparms, ellipsis); | |
2015 | else | |
2016 | return build_method_decl (INSTANCE_METHOD_DECL, rettype, selector, | |
2017 | optparms, ellipsis); | |
6408ef33 ZL |
2018 | } |
2019 | ||
2020 | void | |
249a82c4 | 2021 | objc_add_method_declaration (bool is_class_method, tree decl, tree attributes) |
6408ef33 ZL |
2022 | { |
2023 | if (!objc_interface_context) | |
45547c7f NP |
2024 | { |
2025 | /* PS: At the moment, due to how the parser works, it should be | |
2026 | impossible to get here. But it's good to have the check in | |
2027 | case the parser changes. | |
2028 | */ | |
2029 | fatal_error ("method declaration not in @interface context"); | |
2030 | } | |
6408ef33 | 2031 | |
22d8d616 NP |
2032 | if (flag_objc1_only && attributes) |
2033 | error_at (input_location, "method attributes are not available in Objective-C 1.0"); | |
2034 | ||
a1178b30 | 2035 | objc_decl_method_attributes (&decl, attributes, 0); |
6408ef33 ZL |
2036 | objc_add_method (objc_interface_context, |
2037 | decl, | |
249a82c4 | 2038 | is_class_method, |
92902b1b | 2039 | objc_method_optional_flag); |
6408ef33 ZL |
2040 | } |
2041 | ||
45547c7f NP |
2042 | /* Return 'true' if the method definition could be started, and |
2043 | 'false' if not (because we are outside an @implementation context). | |
a04a722b JM |
2044 | EXPR is NULL or an expression that needs to be evaluated for the |
2045 | side effects of array size expressions in the parameters. | |
45547c7f NP |
2046 | */ |
2047 | bool | |
a04a722b JM |
2048 | objc_start_method_definition (bool is_class_method, tree decl, tree attributes, |
2049 | tree expr) | |
6408ef33 ZL |
2050 | { |
2051 | if (!objc_implementation_context) | |
45547c7f NP |
2052 | { |
2053 | error ("method definition not in @implementation context"); | |
2054 | return false; | |
2055 | } | |
6408ef33 | 2056 | |
a26d8862 NP |
2057 | if (decl != NULL_TREE && METHOD_SEL_NAME (decl) == error_mark_node) |
2058 | return false; | |
2059 | ||
0f185d6e NP |
2060 | #ifndef OBJCPLUS |
2061 | /* Indicate no valid break/continue context by setting these variables | |
2062 | to some non-null, non-label value. We'll notice and emit the proper | |
2063 | error message in c_finish_bc_stmt. */ | |
2064 | c_break_label = c_cont_label = size_zero_node; | |
2065 | #endif | |
2066 | ||
2debdb4f NP |
2067 | if (attributes) |
2068 | warning_at (input_location, 0, "method attributes can not be specified in @implementation context"); | |
2069 | else | |
2070 | objc_decl_method_attributes (&decl, attributes, 0); | |
2071 | ||
6408ef33 ZL |
2072 | objc_add_method (objc_implementation_context, |
2073 | decl, | |
249a82c4 | 2074 | is_class_method, |
92902b1b | 2075 | /* is optional */ false); |
a04a722b | 2076 | start_method_def (decl, expr); |
45547c7f | 2077 | return true; |
6408ef33 ZL |
2078 | } |
2079 | ||
2080 | void | |
2081 | objc_add_instance_variable (tree decl) | |
2082 | { | |
2083 | (void) add_instance_variable (objc_ivar_context, | |
c37d8c30 | 2084 | objc_ivar_visibility, |
6408ef33 ZL |
2085 | decl); |
2086 | } | |
2087 | ||
5025f379 | 2088 | /* Construct a C struct with same name as KLASS, a base struct with tag |
d11dd684 | 2089 | SUPER_NAME (if any), and FIELDS indicated. */ |
3f16185f | 2090 | |
d11dd684 | 2091 | static tree |
5025f379 | 2092 | objc_build_struct (tree klass, tree fields, tree super_name) |
d11dd684 | 2093 | { |
5025f379 | 2094 | tree name = CLASS_NAME (klass); |
24b97832 | 2095 | tree s = objc_start_struct (name); |
d11dd684 | 2096 | tree super = (super_name ? xref_tag (RECORD_TYPE, super_name) : NULL_TREE); |
3e78185c NF |
2097 | tree t; |
2098 | VEC(tree,heap) *objc_info = NULL; | |
2099 | int i; | |
d11dd684 ZL |
2100 | |
2101 | if (super) | |
2102 | { | |
2103 | /* Prepend a packed variant of the base class into the layout. This | |
2104 | is necessary to preserve ObjC ABI compatibility. */ | |
c2255bc4 AH |
2105 | tree base = build_decl (input_location, |
2106 | FIELD_DECL, NULL_TREE, super); | |
d11dd684 ZL |
2107 | tree field = TYPE_FIELDS (super); |
2108 | ||
910ad8de NF |
2109 | while (field && DECL_CHAIN (field) |
2110 | && TREE_CODE (DECL_CHAIN (field)) == FIELD_DECL) | |
2111 | field = DECL_CHAIN (field); | |
d11dd684 | 2112 | |
39a13be5 | 2113 | /* For ObjC ABI purposes, the "packed" size of a base class is |
c64de75f ZL |
2114 | the sum of the offset and the size (in bits) of the last field |
2115 | in the class. */ | |
d11dd684 ZL |
2116 | DECL_SIZE (base) |
2117 | = (field && TREE_CODE (field) == FIELD_DECL | |
64ee9490 | 2118 | ? size_binop (PLUS_EXPR, |
d11dd684 ZL |
2119 | size_binop (PLUS_EXPR, |
2120 | size_binop | |
2121 | (MULT_EXPR, | |
2122 | convert (bitsizetype, | |
2123 | DECL_FIELD_OFFSET (field)), | |
2124 | bitsize_int (BITS_PER_UNIT)), | |
2125 | DECL_FIELD_BIT_OFFSET (field)), | |
2126 | DECL_SIZE (field)) | |
2127 | : bitsize_zero_node); | |
2128 | DECL_SIZE_UNIT (base) | |
2129 | = size_binop (FLOOR_DIV_EXPR, convert (sizetype, DECL_SIZE (base)), | |
2130 | size_int (BITS_PER_UNIT)); | |
2131 | DECL_ARTIFICIAL (base) = 1; | |
2132 | DECL_ALIGN (base) = 1; | |
2133 | DECL_FIELD_CONTEXT (base) = s; | |
2134 | #ifdef OBJCPLUS | |
2135 | DECL_FIELD_IS_BASE (base) = 1; | |
2136 | ||
2137 | if (fields) | |
2138 | TREE_NO_WARNING (fields) = 1; /* Suppress C++ ABI warnings -- we */ | |
2139 | #endif /* are following the ObjC ABI here. */ | |
910ad8de | 2140 | DECL_CHAIN (base) = fields; |
d11dd684 ZL |
2141 | fields = base; |
2142 | } | |
2143 | ||
a693d3a8 NP |
2144 | /* NB: Calling finish_struct() may cause type TYPE_OBJC_INFO |
2145 | information in all variants of this RECORD_TYPE to be destroyed | |
2146 | (this is because the C frontend manipulates TYPE_LANG_SPECIFIC | |
2147 | for something else and then will change all variants to use the | |
2148 | same resulting TYPE_LANG_SPECIFIC, ignoring the fact that we use | |
2149 | it for ObjC protocols and that such propagation will make all | |
2150 | variants use the same objc_info), but it is therein that we store | |
2151 | protocol conformance info (e.g., 'NSObject <MyProtocol>'). | |
2152 | Hence, we must save the ObjC-specific information before calling | |
2aba33dd ZL |
2153 | finish_struct(), and then reinstate it afterwards. */ |
2154 | ||
a693d3a8 | 2155 | for (t = TYPE_MAIN_VARIANT (s); t; t = TYPE_NEXT_VARIANT (t)) |
76dcaf33 | 2156 | { |
a693d3a8 | 2157 | INIT_TYPE_OBJC_INFO (t); |
3e78185c | 2158 | VEC_safe_push (tree, heap, objc_info, TYPE_OBJC_INFO (t)); |
76dcaf33 | 2159 | } |
2aba33dd | 2160 | |
24b97832 | 2161 | s = objc_finish_struct (s, fields); |
d11dd684 | 2162 | |
a693d3a8 | 2163 | for (i = 0, t = TYPE_MAIN_VARIANT (s); t; t = TYPE_NEXT_VARIANT (t), i++) |
a0e71127 | 2164 | { |
a693d3a8 NP |
2165 | /* We now want to restore the different TYPE_OBJC_INFO, but we |
2166 | have the additional problem that the C frontend doesn't just | |
2167 | copy TYPE_LANG_SPECIFIC from one variant to the other; it | |
2168 | actually makes all of them the *same* TYPE_LANG_SPECIFIC. As | |
2169 | we need a different TYPE_OBJC_INFO for each (and | |
2170 | TYPE_OBJC_INFO is a field in TYPE_LANG_SPECIFIC), we need to | |
2171 | make a copy of each TYPE_LANG_SPECIFIC before we modify | |
2172 | TYPE_OBJC_INFO. */ | |
2173 | if (TYPE_LANG_SPECIFIC (t)) | |
2174 | { | |
2175 | /* Create a copy of TYPE_LANG_SPECIFIC. */ | |
2176 | struct lang_type *old_lang_type = TYPE_LANG_SPECIFIC (t); | |
2177 | ALLOC_OBJC_TYPE_LANG_SPECIFIC (t); | |
2178 | memcpy (TYPE_LANG_SPECIFIC (t), old_lang_type, | |
2179 | SIZEOF_OBJC_TYPE_LANG_SPECIFIC); | |
2180 | } | |
2181 | else | |
2182 | { | |
2183 | /* Just create a new one. */ | |
2184 | ALLOC_OBJC_TYPE_LANG_SPECIFIC (t); | |
2185 | } | |
2186 | /* Replace TYPE_OBJC_INFO with the saved one. This restores any | |
2187 | protocol information that may have been associated with the | |
2188 | type. */ | |
3e78185c | 2189 | TYPE_OBJC_INFO (t) = VEC_index (tree, objc_info, i); |
a693d3a8 NP |
2190 | /* Replace the IDENTIFIER_NODE with an actual @interface now |
2191 | that we have it. */ | |
5025f379 | 2192 | TYPE_OBJC_INTERFACE (t) = klass; |
a0e71127 | 2193 | } |
3e78185c | 2194 | VEC_free (tree, heap, objc_info); |
2aba33dd | 2195 | |
d11dd684 ZL |
2196 | /* Use TYPE_BINFO structures to point at the super class, if any. */ |
2197 | objc_xref_basetypes (s, super); | |
2198 | ||
a0e71127 | 2199 | /* Mark this struct as a class template. */ |
5025f379 | 2200 | CLASS_STATIC_TEMPLATE (klass) = s; |
a0e71127 | 2201 | |
d11dd684 ZL |
2202 | return s; |
2203 | } | |
2204 | ||
2205 | /* Mark DECL as being 'volatile' for purposes of Darwin | |
2206 | _setjmp()/_longjmp() exception handling. Called from | |
2207 | objc_mark_locals_volatile(). */ | |
2208 | void | |
2209 | objc_volatilize_decl (tree decl) | |
2210 | { | |
2211 | /* Do not mess with variables that are 'static' or (already) | |
2212 | 'volatile'. */ | |
2213 | if (!TREE_THIS_VOLATILE (decl) && !TREE_STATIC (decl) | |
2214 | && (TREE_CODE (decl) == VAR_DECL | |
2215 | || TREE_CODE (decl) == PARM_DECL)) | |
2216 | { | |
6c39e757 NP |
2217 | if (local_variables_to_volatilize == NULL) |
2218 | local_variables_to_volatilize = VEC_alloc (tree, gc, 8); | |
d11dd684 | 2219 | |
6c39e757 NP |
2220 | VEC_safe_push (tree, gc, local_variables_to_volatilize, decl); |
2221 | } | |
2222 | } | |
d11dd684 | 2223 | |
6c39e757 NP |
2224 | /* Called when parsing of a function completes; if any local variables |
2225 | in the function were marked as variables to volatilize, change them | |
2226 | to volatile. We do this at the end of the function when the | |
2227 | warnings about discarding 'volatile' have already been produced. | |
2228 | We are making the variables as volatile just to force the compiler | |
2229 | to preserve them between setjmp/longjmp, but we don't want warnings | |
2230 | for them as they aren't really volatile. */ | |
2231 | void | |
2232 | objc_finish_function (void) | |
2233 | { | |
2234 | /* If there are any local variables to volatilize, volatilize them. */ | |
2235 | if (local_variables_to_volatilize) | |
2236 | { | |
2237 | int i; | |
2238 | tree decl; | |
2239 | FOR_EACH_VEC_ELT (tree, local_variables_to_volatilize, i, decl) | |
2240 | { | |
2241 | tree t = TREE_TYPE (decl); | |
2242 | ||
2243 | t = build_qualified_type (t, TYPE_QUALS (t) | TYPE_QUAL_VOLATILE); | |
2244 | TREE_TYPE (decl) = t; | |
2245 | TREE_THIS_VOLATILE (decl) = 1; | |
2246 | TREE_SIDE_EFFECTS (decl) = 1; | |
2247 | DECL_REGISTER (decl) = 0; | |
d11dd684 | 2248 | #ifndef OBJCPLUS |
6c39e757 | 2249 | C_DECL_REGISTER (decl) = 0; |
d11dd684 | 2250 | #endif |
6c39e757 NP |
2251 | } |
2252 | ||
2253 | /* Now we delete the vector. This sets it to NULL as well. */ | |
2254 | VEC_free (tree, gc, local_variables_to_volatilize); | |
d11dd684 ZL |
2255 | } |
2256 | } | |
2257 | ||
2258 | /* Check if protocol PROTO is adopted (directly or indirectly) by class CLS | |
c9819cb2 | 2259 | (including its categories and superclasses) or by object type TYP. |
d11dd684 ZL |
2260 | Issue a warning if PROTO is not adopted anywhere and WARN is set. */ |
2261 | ||
2262 | static bool | |
2263 | objc_lookup_protocol (tree proto, tree cls, tree typ, bool warn) | |
3f16185f | 2264 | { |
d11dd684 | 2265 | bool class_type = (cls != NULL_TREE); |
3f16185f | 2266 | |
d11dd684 | 2267 | while (cls) |
3f16185f | 2268 | { |
d11dd684 ZL |
2269 | tree c; |
2270 | ||
2271 | /* Check protocols adopted by the class and its categories. */ | |
2272 | for (c = cls; c; c = CLASS_CATEGORY_LIST (c)) | |
2273 | { | |
2274 | if (lookup_protocol_in_reflist (CLASS_PROTOCOL_LIST (c), proto)) | |
2275 | return true; | |
2276 | } | |
2277 | ||
2278 | /* Repeat for superclasses. */ | |
2279 | cls = lookup_interface (CLASS_SUPER_NAME (cls)); | |
3f16185f | 2280 | } |
d11dd684 ZL |
2281 | |
2282 | /* Check for any protocols attached directly to the object type. */ | |
2283 | if (TYPE_HAS_OBJC_INFO (typ)) | |
3f16185f | 2284 | { |
d11dd684 ZL |
2285 | if (lookup_protocol_in_reflist (TYPE_OBJC_PROTOCOL_LIST (typ), proto)) |
2286 | return true; | |
2287 | } | |
2288 | ||
2289 | if (warn) | |
2290 | { | |
f41c4af3 | 2291 | *errbuf = 0; |
d11dd684 | 2292 | gen_type_name_0 (class_type ? typ : TYPE_POINTER_TO (typ)); |
d11dd684 ZL |
2293 | /* NB: Types 'id' and 'Class' cannot reasonably be described as |
2294 | "implementing" a given protocol, since they do not have an | |
2295 | implementation. */ | |
f41c4af3 JM |
2296 | if (class_type) |
2297 | warning (0, "class %qs does not implement the %qE protocol", | |
2298 | identifier_to_locale (errbuf), PROTOCOL_NAME (proto)); | |
2299 | else | |
2300 | warning (0, "type %qs does not conform to the %qE protocol", | |
2301 | identifier_to_locale (errbuf), PROTOCOL_NAME (proto)); | |
3f16185f | 2302 | } |
d11dd684 ZL |
2303 | |
2304 | return false; | |
3f16185f AM |
2305 | } |
2306 | ||
d11dd684 ZL |
2307 | /* Check if class RCLS and instance struct type RTYP conform to at least the |
2308 | same protocols that LCLS and LTYP conform to. */ | |
2309 | ||
2310 | static bool | |
2311 | objc_compare_protocols (tree lcls, tree ltyp, tree rcls, tree rtyp, bool warn) | |
2312 | { | |
2313 | tree p; | |
2314 | bool have_lproto = false; | |
2315 | ||
2316 | while (lcls) | |
2317 | { | |
2318 | /* NB: We do _not_ look at categories defined for LCLS; these may or | |
2319 | may not get loaded in, and therefore it is unreasonable to require | |
2320 | that RCLS/RTYP must implement any of their protocols. */ | |
2321 | for (p = CLASS_PROTOCOL_LIST (lcls); p; p = TREE_CHAIN (p)) | |
2322 | { | |
2323 | have_lproto = true; | |
3f16185f | 2324 | |
d11dd684 ZL |
2325 | if (!objc_lookup_protocol (TREE_VALUE (p), rcls, rtyp, warn)) |
2326 | return warn; | |
2327 | } | |
1074d9d4 | 2328 | |
d11dd684 ZL |
2329 | /* Repeat for superclasses. */ |
2330 | lcls = lookup_interface (CLASS_SUPER_NAME (lcls)); | |
2331 | } | |
1074d9d4 | 2332 | |
d11dd684 ZL |
2333 | /* Check for any protocols attached directly to the object type. */ |
2334 | if (TYPE_HAS_OBJC_INFO (ltyp)) | |
2335 | { | |
2336 | for (p = TYPE_OBJC_PROTOCOL_LIST (ltyp); p; p = TREE_CHAIN (p)) | |
2337 | { | |
2338 | have_lproto = true; | |
392202b0 | 2339 | |
d11dd684 ZL |
2340 | if (!objc_lookup_protocol (TREE_VALUE (p), rcls, rtyp, warn)) |
2341 | return warn; | |
2342 | } | |
2343 | } | |
2344 | ||
2345 | /* NB: If LTYP and LCLS have no protocols to search for, return 'true' | |
2346 | vacuously, _unless_ RTYP is a protocol-qualified 'id'. We can get | |
2347 | away with simply checking for 'id' or 'Class' (!RCLS), since this | |
2348 | routine will not get called in other cases. */ | |
2349 | return have_lproto || (rcls != NULL_TREE); | |
2350 | } | |
2351 | ||
b581b85b NP |
2352 | /* Given two types TYPE1 and TYPE2, return their least common ancestor. |
2353 | Both TYPE1 and TYPE2 must be pointers, and already determined to be | |
2354 | compatible by objc_compare_types() below. */ | |
2355 | ||
2356 | tree | |
2357 | objc_common_type (tree type1, tree type2) | |
2358 | { | |
2359 | tree inner1 = TREE_TYPE (type1), inner2 = TREE_TYPE (type2); | |
2360 | ||
2361 | while (POINTER_TYPE_P (inner1)) | |
2362 | { | |
2363 | inner1 = TREE_TYPE (inner1); | |
2364 | inner2 = TREE_TYPE (inner2); | |
2365 | } | |
2366 | ||
2367 | /* If one type is derived from another, return the base type. */ | |
2368 | if (DERIVED_FROM_P (inner1, inner2)) | |
2369 | return type1; | |
2370 | else if (DERIVED_FROM_P (inner2, inner1)) | |
2371 | return type2; | |
2372 | ||
2373 | /* If both types are 'Class', return 'Class'. */ | |
2374 | if (objc_is_class_id (inner1) && objc_is_class_id (inner2)) | |
2375 | return objc_class_type; | |
2376 | ||
2377 | /* Otherwise, return 'id'. */ | |
2378 | return objc_object_type; | |
2379 | } | |
2380 | ||
d11dd684 ZL |
2381 | /* Determine if it is permissible to assign (if ARGNO is greater than -3) |
2382 | an instance of RTYP to an instance of LTYP or to compare the two | |
2383 | (if ARGNO is equal to -3), per ObjC type system rules. Before | |
2384 | returning 'true', this routine may issue warnings related to, e.g., | |
2385 | protocol conformance. When returning 'false', the routine must | |
2386 | produce absolutely no warnings; the C or C++ front-end will do so | |
10e34e6e NP |
2387 | instead, if needed. If either LTYP or RTYP is not an Objective-C |
2388 | type, the routine must return 'false'. | |
d11dd684 ZL |
2389 | |
2390 | The ARGNO parameter is encoded as follows: | |
2391 | >= 1 Parameter number (CALLEE contains function being called); | |
2392 | 0 Return value; | |
2393 | -1 Assignment; | |
2394 | -2 Initialization; | |
4c116505 | 2395 | -3 Comparison (LTYP and RTYP may match in either direction); |
10e34e6e | 2396 | -4 Silent comparison (for C++ overload resolution); |
944fb799 MS |
2397 | -5 Silent "specialization" comparison for RTYP to be a "specialization" |
2398 | of LTYP (a specialization means that RTYP is LTYP plus some constraints, | |
10e34e6e NP |
2399 | so that each object of type RTYP is also of type LTYP). This is used |
2400 | when comparing property types. */ | |
d11dd684 ZL |
2401 | |
2402 | bool | |
2403 | objc_compare_types (tree ltyp, tree rtyp, int argno, tree callee) | |
6c65299b | 2404 | { |
d11dd684 ZL |
2405 | tree lcls, rcls, lproto, rproto; |
2406 | bool pointers_compatible; | |
2407 | ||
2408 | /* We must be dealing with pointer types */ | |
2409 | if (!POINTER_TYPE_P (ltyp) || !POINTER_TYPE_P (rtyp)) | |
2410 | return false; | |
e31c7eec | 2411 | |
d11dd684 | 2412 | do |
e31c7eec | 2413 | { |
d11dd684 ZL |
2414 | ltyp = TREE_TYPE (ltyp); /* Remove indirections. */ |
2415 | rtyp = TREE_TYPE (rtyp); | |
2416 | } | |
2417 | while (POINTER_TYPE_P (ltyp) && POINTER_TYPE_P (rtyp)); | |
e31c7eec | 2418 | |
0f185d6e NP |
2419 | /* We must also handle function pointers, since ObjC is a bit more |
2420 | lenient than C or C++ on this. */ | |
2421 | if (TREE_CODE (ltyp) == FUNCTION_TYPE && TREE_CODE (rtyp) == FUNCTION_TYPE) | |
2422 | { | |
2423 | /* Return types must be covariant. */ | |
2424 | if (!comptypes (TREE_TYPE (ltyp), TREE_TYPE (rtyp)) | |
2425 | && !objc_compare_types (TREE_TYPE (ltyp), TREE_TYPE (rtyp), | |
2426 | argno, callee)) | |
2427 | return false; | |
2428 | ||
2429 | /* Argument types must be contravariant. */ | |
2430 | for (ltyp = TYPE_ARG_TYPES (ltyp), rtyp = TYPE_ARG_TYPES (rtyp); | |
2431 | ltyp && rtyp; ltyp = TREE_CHAIN (ltyp), rtyp = TREE_CHAIN (rtyp)) | |
2432 | { | |
2433 | if (!comptypes (TREE_VALUE (rtyp), TREE_VALUE (ltyp)) | |
2434 | && !objc_compare_types (TREE_VALUE (rtyp), TREE_VALUE (ltyp), | |
2435 | argno, callee)) | |
2436 | return false; | |
2437 | } | |
2438 | ||
2439 | return (ltyp == rtyp); | |
2440 | } | |
2441 | ||
d11dd684 ZL |
2442 | /* Past this point, we are only interested in ObjC class instances, |
2443 | or 'id' or 'Class'. */ | |
2444 | if (TREE_CODE (ltyp) != RECORD_TYPE || TREE_CODE (rtyp) != RECORD_TYPE) | |
2445 | return false; | |
e31c7eec | 2446 | |
d11dd684 ZL |
2447 | if (!objc_is_object_id (ltyp) && !objc_is_class_id (ltyp) |
2448 | && !TYPE_HAS_OBJC_INFO (ltyp)) | |
2449 | return false; | |
3a3589b4 | 2450 | |
d11dd684 ZL |
2451 | if (!objc_is_object_id (rtyp) && !objc_is_class_id (rtyp) |
2452 | && !TYPE_HAS_OBJC_INFO (rtyp)) | |
2453 | return false; | |
011d50d9 | 2454 | |
4c116505 NP |
2455 | /* Past this point, we are committed to returning 'true' to the caller |
2456 | (unless performing a silent comparison; see below). However, we can | |
2457 | still warn about type and/or protocol mismatches. */ | |
e31c7eec | 2458 | |
d11dd684 ZL |
2459 | if (TYPE_HAS_OBJC_INFO (ltyp)) |
2460 | { | |
2461 | lcls = TYPE_OBJC_INTERFACE (ltyp); | |
2462 | lproto = TYPE_OBJC_PROTOCOL_LIST (ltyp); | |
2463 | } | |
2464 | else | |
2465 | lcls = lproto = NULL_TREE; | |
e31c7eec | 2466 | |
d11dd684 ZL |
2467 | if (TYPE_HAS_OBJC_INFO (rtyp)) |
2468 | { | |
2469 | rcls = TYPE_OBJC_INTERFACE (rtyp); | |
2470 | rproto = TYPE_OBJC_PROTOCOL_LIST (rtyp); | |
2471 | } | |
2472 | else | |
2473 | rcls = rproto = NULL_TREE; | |
3a3589b4 | 2474 | |
a0e71127 ZL |
2475 | /* If we could not find an @interface declaration, we must have |
2476 | only seen a @class declaration; for purposes of type comparison, | |
2477 | treat it as a stand-alone (root) class. */ | |
2478 | ||
2479 | if (lcls && TREE_CODE (lcls) == IDENTIFIER_NODE) | |
2480 | lcls = NULL_TREE; | |
2481 | ||
2482 | if (rcls && TREE_CODE (rcls) == IDENTIFIER_NODE) | |
2483 | rcls = NULL_TREE; | |
2484 | ||
10e34e6e NP |
2485 | /* If either type is an unqualified 'id', we're done. This is because |
2486 | an 'id' can be assigned to or from any type with no warnings. */ | |
2487 | if (argno != -5) | |
2488 | { | |
2489 | if ((!lproto && objc_is_object_id (ltyp)) | |
2490 | || (!rproto && objc_is_object_id (rtyp))) | |
2491 | return true; | |
2492 | } | |
2493 | else | |
2494 | { | |
2495 | /* For property checks, though, an 'id' is considered the most | |
2496 | general type of object, hence if you try to specialize an | |
2497 | 'NSArray *' (ltyp) property with an 'id' (rtyp) one, we need | |
2498 | to warn. */ | |
2499 | if (!lproto && objc_is_object_id (ltyp)) | |
2500 | return true; | |
2501 | } | |
944fb799 | 2502 | |
d11dd684 | 2503 | pointers_compatible = (TYPE_MAIN_VARIANT (ltyp) == TYPE_MAIN_VARIANT (rtyp)); |
51900510 | 2504 | |
d11dd684 ZL |
2505 | /* If the underlying types are the same, and at most one of them has |
2506 | a protocol list, we do not need to issue any diagnostics. */ | |
2507 | if (pointers_compatible && (!lproto || !rproto)) | |
2508 | return true; | |
3a3589b4 | 2509 | |
d11dd684 ZL |
2510 | /* If exactly one of the types is 'Class', issue a diagnostic; any |
2511 | exceptions of this rule have already been handled. */ | |
2512 | if (objc_is_class_id (ltyp) ^ objc_is_class_id (rtyp)) | |
2513 | pointers_compatible = false; | |
2514 | /* Otherwise, check for inheritance relations. */ | |
2515 | else | |
2516 | { | |
2517 | if (!pointers_compatible) | |
10e34e6e NP |
2518 | { |
2519 | /* Again, if any of the two is an 'id', we're satisfied, | |
2520 | unless we're comparing properties, in which case only an | |
2521 | 'id' on the left-hand side (old property) is good | |
2522 | enough. */ | |
2523 | if (argno != -5) | |
2524 | pointers_compatible | |
2525 | = (objc_is_object_id (ltyp) || objc_is_object_id (rtyp)); | |
2526 | else | |
944fb799 | 2527 | pointers_compatible = objc_is_object_id (ltyp); |
10e34e6e | 2528 | } |
d11dd684 ZL |
2529 | |
2530 | if (!pointers_compatible) | |
2531 | pointers_compatible = DERIVED_FROM_P (ltyp, rtyp); | |
2532 | ||
10e34e6e | 2533 | if (!pointers_compatible && (argno == -3 || argno == -4)) |
d11dd684 ZL |
2534 | pointers_compatible = DERIVED_FROM_P (rtyp, ltyp); |
2535 | } | |
2536 | ||
2537 | /* If the pointers match modulo protocols, check for protocol conformance | |
2538 | mismatches. */ | |
2539 | if (pointers_compatible) | |
2540 | { | |
2541 | pointers_compatible = objc_compare_protocols (lcls, ltyp, rcls, rtyp, | |
2542 | argno != -3); | |
2543 | ||
2544 | if (!pointers_compatible && argno == -3) | |
2545 | pointers_compatible = objc_compare_protocols (rcls, rtyp, lcls, ltyp, | |
2546 | argno != -3); | |
2547 | } | |
2548 | ||
2549 | if (!pointers_compatible) | |
2550 | { | |
4c116505 NP |
2551 | /* The two pointers are not exactly compatible. Issue a warning, unless |
2552 | we are performing a silent comparison, in which case return 'false' | |
2553 | instead. */ | |
d11dd684 ZL |
2554 | /* NB: For the time being, we shall make our warnings look like their |
2555 | C counterparts. In the future, we may wish to make them more | |
2556 | ObjC-specific. */ | |
2557 | switch (argno) | |
1074d9d4 | 2558 | { |
10e34e6e | 2559 | case -5: |
4c116505 NP |
2560 | case -4: |
2561 | return false; | |
2562 | ||
d11dd684 ZL |
2563 | case -3: |
2564 | warning (0, "comparison of distinct Objective-C types lacks a cast"); | |
2565 | break; | |
2566 | ||
2567 | case -2: | |
2568 | warning (0, "initialization from distinct Objective-C type"); | |
2569 | break; | |
2570 | ||
2571 | case -1: | |
2572 | warning (0, "assignment from distinct Objective-C type"); | |
2573 | break; | |
2574 | ||
2575 | case 0: | |
2576 | warning (0, "distinct Objective-C type in return"); | |
2577 | break; | |
2578 | ||
2579 | default: | |
2580 | warning (0, "passing argument %d of %qE from distinct " | |
2581 | "Objective-C type", argno, callee); | |
2582 | break; | |
1074d9d4 | 2583 | } |
e31c7eec | 2584 | } |
51900510 | 2585 | |
d11dd684 ZL |
2586 | return true; |
2587 | } | |
2588 | ||
b581b85b NP |
2589 | /* This routine is similar to objc_compare_types except that function-pointers are |
2590 | excluded. This is because, caller assumes that common types are of (id, Object*) | |
2591 | variety and calls objc_common_type to obtain a common type. There is no commonolty | |
2592 | between two function-pointers in this regard. */ | |
2593 | ||
944fb799 | 2594 | bool |
b581b85b NP |
2595 | objc_have_common_type (tree ltyp, tree rtyp, int argno, tree callee) |
2596 | { | |
2597 | if (objc_compare_types (ltyp, rtyp, argno, callee)) | |
2598 | { | |
2599 | /* exclude function-pointer types. */ | |
2600 | do | |
2601 | { | |
2602 | ltyp = TREE_TYPE (ltyp); /* Remove indirections. */ | |
2603 | rtyp = TREE_TYPE (rtyp); | |
2604 | } | |
2605 | while (POINTER_TYPE_P (ltyp) && POINTER_TYPE_P (rtyp)); | |
2606 | return !(TREE_CODE (ltyp) == FUNCTION_TYPE && TREE_CODE (rtyp) == FUNCTION_TYPE); | |
2607 | } | |
2608 | return false; | |
2609 | } | |
2610 | ||
d11dd684 ZL |
2611 | #ifndef OBJCPLUS |
2612 | /* Determine if CHILD is derived from PARENT. The routine assumes that | |
2613 | both parameters are RECORD_TYPEs, and is non-reflexive. */ | |
2614 | ||
2615 | static bool | |
2616 | objc_derived_from_p (tree parent, tree child) | |
2617 | { | |
2618 | parent = TYPE_MAIN_VARIANT (parent); | |
2619 | ||
2620 | for (child = TYPE_MAIN_VARIANT (child); | |
2621 | TYPE_BINFO (child) && BINFO_N_BASE_BINFOS (TYPE_BINFO (child));) | |
1074d9d4 | 2622 | { |
d11dd684 ZL |
2623 | child = TYPE_MAIN_VARIANT (BINFO_TYPE (BINFO_BASE_BINFO |
2624 | (TYPE_BINFO (child), | |
2625 | 0))); | |
2626 | ||
2627 | if (child == parent) | |
2628 | return true; | |
1074d9d4 | 2629 | } |
6c65299b | 2630 | |
d11dd684 ZL |
2631 | return false; |
2632 | } | |
2633 | #endif | |
2634 | ||
d764a8e6 | 2635 | tree |
d11dd684 ZL |
2636 | objc_build_component_ref (tree datum, tree component) |
2637 | { | |
2638 | /* If COMPONENT is NULL, the caller is referring to the anonymous | |
2639 | base class field. */ | |
2640 | if (!component) | |
2641 | { | |
2642 | tree base = TYPE_FIELDS (TREE_TYPE (datum)); | |
6c65299b | 2643 | |
d11dd684 ZL |
2644 | return build3 (COMPONENT_REF, TREE_TYPE (base), datum, base, NULL_TREE); |
2645 | } | |
6c65299b | 2646 | |
d11dd684 ZL |
2647 | /* The 'build_component_ref' routine has been removed from the C++ |
2648 | front-end, but 'finish_class_member_access_expr' seems to be | |
2649 | a worthy substitute. */ | |
2650 | #ifdef OBJCPLUS | |
525521b6 DG |
2651 | return finish_class_member_access_expr (datum, component, false, |
2652 | tf_warning_or_error); | |
d11dd684 | 2653 | #else |
c2255bc4 | 2654 | return build_component_ref (input_location, datum, component); |
d11dd684 ZL |
2655 | #endif |
2656 | } | |
6c65299b | 2657 | |
d11dd684 ZL |
2658 | /* Recursively copy inheritance information rooted at BINFO. To do this, |
2659 | we emulate the song and dance performed by cp/tree.c:copy_binfo(). */ | |
f75963f5 | 2660 | |
d11dd684 ZL |
2661 | static tree |
2662 | objc_copy_binfo (tree binfo) | |
2663 | { | |
2664 | tree btype = BINFO_TYPE (binfo); | |
2665 | tree binfo2 = make_tree_binfo (BINFO_N_BASE_BINFOS (binfo)); | |
2666 | tree base_binfo; | |
2667 | int ix; | |
6c65299b | 2668 | |
d11dd684 ZL |
2669 | BINFO_TYPE (binfo2) = btype; |
2670 | BINFO_OFFSET (binfo2) = BINFO_OFFSET (binfo); | |
2671 | BINFO_BASE_ACCESSES (binfo2) = BINFO_BASE_ACCESSES (binfo); | |
2672 | ||
2673 | /* Recursively copy base binfos of BINFO. */ | |
2674 | for (ix = 0; BINFO_BASE_ITERATE (binfo, ix, base_binfo); ix++) | |
6c65299b | 2675 | { |
d11dd684 ZL |
2676 | tree base_binfo2 = objc_copy_binfo (base_binfo); |
2677 | ||
2678 | BINFO_INHERITANCE_CHAIN (base_binfo2) = binfo2; | |
2679 | BINFO_BASE_APPEND (binfo2, base_binfo2); | |
2680 | } | |
2681 | ||
2682 | return binfo2; | |
2683 | } | |
2684 | ||
2685 | /* Record superclass information provided in BASETYPE for ObjC class REF. | |
2686 | This is loosely based on cp/decl.c:xref_basetypes(). */ | |
6c65299b | 2687 | |
d11dd684 ZL |
2688 | static void |
2689 | objc_xref_basetypes (tree ref, tree basetype) | |
2690 | { | |
2691 | tree binfo = make_tree_binfo (basetype ? 1 : 0); | |
6c65299b | 2692 | |
d11dd684 ZL |
2693 | TYPE_BINFO (ref) = binfo; |
2694 | BINFO_OFFSET (binfo) = size_zero_node; | |
2695 | BINFO_TYPE (binfo) = ref; | |
e31c7eec | 2696 | |
d11dd684 ZL |
2697 | if (basetype) |
2698 | { | |
2699 | tree base_binfo = objc_copy_binfo (TYPE_BINFO (basetype)); | |
e31c7eec | 2700 | |
d11dd684 ZL |
2701 | BINFO_INHERITANCE_CHAIN (base_binfo) = binfo; |
2702 | BINFO_BASE_ACCESSES (binfo) = VEC_alloc (tree, gc, 1); | |
2703 | BINFO_BASE_APPEND (binfo, base_binfo); | |
2704 | BINFO_BASE_ACCESS_APPEND (binfo, access_public_node); | |
6c65299b | 2705 | } |
d11dd684 ZL |
2706 | } |
2707 | ||
264fa2db | 2708 | /* Called from finish_decl. */ |
6c65299b | 2709 | |
e31c7eec | 2710 | void |
011d50d9 | 2711 | objc_check_decl (tree decl) |
e31c7eec TW |
2712 | { |
2713 | tree type = TREE_TYPE (decl); | |
2714 | ||
264fa2db ZL |
2715 | if (TREE_CODE (type) != RECORD_TYPE) |
2716 | return; | |
57a6af27 | 2717 | if (OBJC_TYPE_NAME (type) && (type = objc_is_class_name (OBJC_TYPE_NAME (type)))) |
f41c4af3 JM |
2718 | error ("statically allocated instance of Objective-C class %qE", |
2719 | type); | |
e31c7eec TW |
2720 | } |
2721 | ||
a6341d57 NP |
2722 | void |
2723 | objc_check_global_decl (tree decl) | |
2724 | { | |
2725 | tree id = DECL_NAME (decl); | |
2726 | if (objc_is_class_name (id) && global_bindings_p()) | |
2727 | error ("redeclaration of Objective-C class %qs", IDENTIFIER_POINTER (id)); | |
2728 | } | |
2729 | ||
a693d3a8 NP |
2730 | /* Construct a PROTOCOLS-qualified variant of INTERFACE, where |
2731 | INTERFACE may either name an Objective-C class, or refer to the | |
2732 | special 'id' or 'Class' types. If INTERFACE is not a valid ObjC | |
2733 | type, just return it unchanged. This function is often called when | |
2734 | PROTOCOLS is NULL_TREE, in which case we simply look up the | |
2735 | appropriate INTERFACE. */ | |
6c65299b RS |
2736 | |
2737 | tree | |
6408ef33 | 2738 | objc_get_protocol_qualified_type (tree interface, tree protocols) |
e31c7eec | 2739 | { |
035e8f01 ZL |
2740 | /* If INTERFACE is not provided, default to 'id'. */ |
2741 | tree type = (interface ? objc_is_id (interface) : objc_object_type); | |
2742 | bool is_ptr = (type != NULL_TREE); | |
e31c7eec | 2743 | |
035e8f01 | 2744 | if (!is_ptr) |
e31c7eec | 2745 | { |
6408ef33 | 2746 | type = objc_is_class_name (interface); |
e31c7eec | 2747 | |
6408ef33 | 2748 | if (type) |
0f185d6e NP |
2749 | { |
2750 | /* If looking at a typedef, retrieve the precise type it | |
2751 | describes. */ | |
2752 | if (TREE_CODE (interface) == IDENTIFIER_NODE) | |
2753 | interface = identifier_global_value (interface); | |
2754 | ||
2755 | type = ((interface && TREE_CODE (interface) == TYPE_DECL | |
2756 | && DECL_ORIGINAL_TYPE (interface)) | |
2757 | ? DECL_ORIGINAL_TYPE (interface) | |
2758 | : xref_tag (RECORD_TYPE, type)); | |
2759 | } | |
6408ef33 | 2760 | else |
5a2a6eb0 NP |
2761 | { |
2762 | /* This case happens when we are given an 'interface' which | |
2763 | is not a valid class name. For example if a typedef was | |
2764 | used, and 'interface' really is the identifier of the | |
2765 | typedef, but when you resolve it you don't get an | |
2766 | Objective-C class, but something else, such as 'int'. | |
2767 | This is an error; protocols make no sense unless you use | |
2768 | them with Objective-C objects. */ | |
2769 | error_at (input_location, "only Objective-C object types can be qualified with a protocol"); | |
2770 | ||
2771 | /* Try to recover. Ignore the invalid class name, and treat | |
2772 | the object as an 'id' to silence further warnings about | |
2773 | the class. */ | |
2774 | type = objc_object_type; | |
2775 | is_ptr = true; | |
2776 | } | |
6408ef33 | 2777 | } |
51900510 | 2778 | |
e31c7eec TW |
2779 | if (protocols) |
2780 | { | |
8c1d6d62 | 2781 | type = build_variant_type_copy (type); |
6408ef33 | 2782 | |
035e8f01 ZL |
2783 | /* For pointers (i.e., 'id' or 'Class'), attach the protocol(s) |
2784 | to the pointee. */ | |
2785 | if (is_ptr) | |
2786 | { | |
06d40de8 DG |
2787 | tree orig_pointee_type = TREE_TYPE (type); |
2788 | TREE_TYPE (type) = build_variant_type_copy (orig_pointee_type); | |
2789 | ||
2790 | /* Set up the canonical type information. */ | |
944fb799 | 2791 | TYPE_CANONICAL (type) |
06d40de8 DG |
2792 | = TYPE_CANONICAL (TYPE_POINTER_TO (orig_pointee_type)); |
2793 | ||
035e8f01 ZL |
2794 | TYPE_POINTER_TO (TREE_TYPE (type)) = type; |
2795 | type = TREE_TYPE (type); | |
2796 | } | |
2797 | ||
2798 | /* Look up protocols and install in lang specific list. */ | |
2799 | DUP_TYPE_OBJC_INFO (type, TYPE_MAIN_VARIANT (type)); | |
db0581ae NP |
2800 | TYPE_OBJC_PROTOCOL_LIST (type) = lookup_and_install_protocols |
2801 | (protocols, /* definition_required */ false); | |
035e8f01 ZL |
2802 | |
2803 | /* For RECORD_TYPEs, point to the @interface; for 'id' and 'Class', | |
2804 | return the pointer to the new pointee variant. */ | |
2805 | if (is_ptr) | |
2806 | type = TYPE_POINTER_TO (type); | |
2807 | else | |
2808 | TYPE_OBJC_INTERFACE (type) | |
2809 | = TYPE_OBJC_INTERFACE (TYPE_MAIN_VARIANT (type)); | |
e31c7eec | 2810 | } |
6408ef33 | 2811 | |
e31c7eec TW |
2812 | return type; |
2813 | } | |
2814 | ||
f2e6e530 ZL |
2815 | /* Check for circular dependencies in protocols. The arguments are |
2816 | PROTO, the protocol to check, and LIST, a list of protocol it | |
2817 | conforms to. */ | |
2818 | ||
011d50d9 AJ |
2819 | static void |
2820 | check_protocol_recursively (tree proto, tree list) | |
f2e6e530 ZL |
2821 | { |
2822 | tree p; | |
2823 | ||
2824 | for (p = list; p; p = TREE_CHAIN (p)) | |
2825 | { | |
2826 | tree pp = TREE_VALUE (p); | |
2827 | ||
2828 | if (TREE_CODE (pp) == IDENTIFIER_NODE) | |
db0581ae NP |
2829 | pp = lookup_protocol (pp, /* warn if deprecated */ false, |
2830 | /* definition_required */ false); | |
f2e6e530 ZL |
2831 | |
2832 | if (pp == proto) | |
f41c4af3 JM |
2833 | fatal_error ("protocol %qE has circular dependency", |
2834 | PROTOCOL_NAME (pp)); | |
f2e6e530 ZL |
2835 | if (pp) |
2836 | check_protocol_recursively (proto, PROTOCOL_LIST (pp)); | |
2837 | } | |
2838 | } | |
2839 | ||
6b192a09 NP |
2840 | /* Look up PROTOCOLS, and return a list of those that are found. If |
2841 | none are found, return NULL. Note that this function will emit a | |
db0581ae NP |
2842 | warning if a protocol is found and is deprecated. If |
2843 | 'definition_required', then warn if the protocol is found but is | |
2844 | not defined (ie, if we only saw a forward-declaration of the | |
2845 | protocol (as in "@protocol NSObject;") not a real definition with | |
2846 | the list of methods). */ | |
e31c7eec | 2847 | static tree |
db0581ae | 2848 | lookup_and_install_protocols (tree protocols, bool definition_required) |
6c65299b | 2849 | { |
e31c7eec | 2850 | tree proto; |
264fa2db | 2851 | tree return_value = NULL_TREE; |
e31c7eec | 2852 | |
da57d1b9 NP |
2853 | if (protocols == error_mark_node) |
2854 | return NULL; | |
2855 | ||
e31c7eec TW |
2856 | for (proto = protocols; proto; proto = TREE_CHAIN (proto)) |
2857 | { | |
2858 | tree ident = TREE_VALUE (proto); | |
db0581ae NP |
2859 | tree p = lookup_protocol (ident, /* warn_if_deprecated */ true, |
2860 | definition_required); | |
e31c7eec | 2861 | |
7eb314dc | 2862 | if (p) |
264fa2db ZL |
2863 | return_value = chainon (return_value, |
2864 | build_tree_list (NULL_TREE, p)); | |
7eb314dc | 2865 | else if (ident != error_mark_node) |
f41c4af3 JM |
2866 | error ("cannot find protocol declaration for %qE", |
2867 | ident); | |
e31c7eec | 2868 | } |
51900510 | 2869 | |
e31c7eec | 2870 | return return_value; |
6c65299b RS |
2871 | } |
2872 | ||
fa340504 | 2873 | static void |
d764a8e6 | 2874 | build_common_objc_exception_stuff (void) |
6408ef33 | 2875 | { |
d764a8e6 | 2876 | tree noreturn_list, nothrow_list, temp_type; |
6408ef33 | 2877 | |
d764a8e6 IS |
2878 | noreturn_list = tree_cons (get_identifier ("noreturn"), NULL, NULL); |
2879 | nothrow_list = tree_cons (get_identifier ("nothrow"), NULL, NULL); | |
6408ef33 | 2880 | |
d764a8e6 IS |
2881 | /* void objc_exception_throw(id) __attribute__((noreturn)); */ |
2882 | /* void objc_sync_enter(id); */ | |
2883 | /* void objc_sync_exit(id); */ | |
2884 | temp_type = build_function_type_list (void_type_node, | |
2885 | objc_object_type, | |
2886 | NULL_TREE); | |
2887 | objc_exception_throw_decl | |
2888 | = add_builtin_function (TAG_EXCEPTIONTHROW, temp_type, 0, NOT_BUILT_IN, NULL, | |
2889 | noreturn_list); | |
2890 | /* Make sure that objc_exception_throw (id) claims that it may throw an | |
2891 | exception. */ | |
2892 | TREE_NOTHROW (objc_exception_throw_decl) = 0; | |
6408ef33 | 2893 | |
d764a8e6 IS |
2894 | objc_sync_enter_decl |
2895 | = add_builtin_function (TAG_SYNCENTER, temp_type, 0, NOT_BUILT_IN, | |
2896 | NULL, nothrow_list); | |
6408ef33 | 2897 | |
d764a8e6 IS |
2898 | objc_sync_exit_decl |
2899 | = add_builtin_function (TAG_SYNCEXIT, temp_type, 0, NOT_BUILT_IN, | |
2900 | NULL, nothrow_list); | |
fa340504 SS |
2901 | } |
2902 | ||
51900510 | 2903 | /* Purpose: "play" parser, creating/installing representations |
e31c7eec TW |
2904 | of the declarations that are required by Objective-C. |
2905 | ||
51900510 | 2906 | Model: |
e31c7eec | 2907 | |
011d50d9 AJ |
2908 | type_spec--------->sc_spec |
2909 | (tree_list) (tree_list) | |
2910 | | | | |
2911 | | | | |
2912 | identifier_node identifier_node */ | |
e31c7eec | 2913 | |
6c65299b | 2914 | static void |
011d50d9 | 2915 | synth_module_prologue (void) |
6c65299b | 2916 | { |
6408ef33 ZL |
2917 | tree type; |
2918 | enum debug_info_type save_write_symbols = write_symbols; | |
2919 | const struct gcc_debug_hooks *const save_hooks = debug_hooks; | |
2920 | ||
2921 | /* Suppress outputting debug symbols, because | |
39a13be5 | 2922 | dbxout_init hasn't been called yet. */ |
6408ef33 ZL |
2923 | write_symbols = NO_DEBUG; |
2924 | debug_hooks = &do_nothing_debug_hooks; | |
2925 | ||
2926 | #ifdef OBJCPLUS | |
2927 | push_lang_context (lang_name_c); /* extern "C" */ | |
2928 | #endif | |
2929 | ||
2930 | /* The following are also defined in <objc/objc.h> and friends. */ | |
6c65299b | 2931 | |
6c65299b | 2932 | objc_object_id = get_identifier (TAG_OBJECT); |
6408ef33 | 2933 | objc_class_id = get_identifier (TAG_CLASS); |
6c65299b RS |
2934 | |
2935 | objc_object_reference = xref_tag (RECORD_TYPE, objc_object_id); | |
6408ef33 | 2936 | objc_class_reference = xref_tag (RECORD_TYPE, objc_class_id); |
64ee9490 | 2937 | |
6408ef33 ZL |
2938 | objc_object_type = build_pointer_type (objc_object_reference); |
2939 | objc_class_type = build_pointer_type (objc_class_reference); | |
6c65299b | 2940 | |
6408ef33 ZL |
2941 | objc_object_name = get_identifier (OBJECT_TYPEDEF_NAME); |
2942 | objc_class_name = get_identifier (CLASS_TYPEDEF_NAME); | |
6c65299b | 2943 | |
6408ef33 | 2944 | /* Declare the 'id' and 'Class' typedefs. */ |
c2255bc4 AH |
2945 | type = lang_hooks.decls.pushdecl (build_decl (input_location, |
2946 | TYPE_DECL, | |
6408ef33 ZL |
2947 | objc_object_name, |
2948 | objc_object_type)); | |
df0ed6c5 | 2949 | TREE_NO_WARNING (type) = 1; |
d764a8e6 | 2950 | |
c2255bc4 AH |
2951 | type = lang_hooks.decls.pushdecl (build_decl (input_location, |
2952 | TYPE_DECL, | |
6408ef33 ZL |
2953 | objc_class_name, |
2954 | objc_class_type)); | |
df0ed6c5 | 2955 | TREE_NO_WARNING (type) = 1; |
6408ef33 ZL |
2956 | |
2957 | /* Forward-declare '@interface Protocol'. */ | |
6408ef33 | 2958 | type = get_identifier (PROTOCOL_OBJECT_CLASS_NAME); |
32dabdaf | 2959 | objc_declare_class (type); |
d764a8e6 | 2960 | objc_protocol_type = build_pointer_type (xref_tag (RECORD_TYPE, type)); |
6c65299b | 2961 | |
1a4a7065 | 2962 | /* Declare receiver type used for dispatching messages to 'super'. */ |
264fa2db | 2963 | /* `struct objc_super *' */ |
5c234cd7 DA |
2964 | objc_super_type = build_pointer_type (xref_tag (RECORD_TYPE, |
2965 | get_identifier (TAG_SUPER))); | |
e31c7eec | 2966 | |
38b9c8c3 ZL |
2967 | /* Declare pointers to method and ivar lists. */ |
2968 | objc_method_list_ptr = build_pointer_type | |
2969 | (xref_tag (RECORD_TYPE, | |
2970 | get_identifier (UTAG_METHOD_LIST))); | |
2971 | objc_method_proto_list_ptr | |
2972 | = build_pointer_type (xref_tag (RECORD_TYPE, | |
2973 | get_identifier (UTAG_METHOD_PROTOTYPE_LIST))); | |
2974 | objc_ivar_list_ptr = build_pointer_type | |
2975 | (xref_tag (RECORD_TYPE, | |
2976 | get_identifier (UTAG_IVAR_LIST))); | |
2977 | ||
d764a8e6 | 2978 | build_common_objc_exception_stuff (); |
6c65299b | 2979 | |
d764a8e6 IS |
2980 | /* Set-up runtime-specific templates, message and exception stuff. */ |
2981 | (*runtime.initialize) (); | |
6408ef33 | 2982 | |
8f07a2aa NP |
2983 | /* Declare objc_getProperty, object_setProperty and other property |
2984 | accessor helpers. */ | |
d764a8e6 | 2985 | build_common_objc_property_accessor_helpers (); |
e31c7eec | 2986 | |
e31c7eec | 2987 | /* Forward declare constant_string_id and constant_string_type. */ |
fda47030 | 2988 | if (!constant_string_class_name) |
d764a8e6 | 2989 | constant_string_class_name = runtime.default_constant_string_class_name; |
fda47030 | 2990 | constant_string_id = get_identifier (constant_string_class_name); |
32dabdaf | 2991 | objc_declare_class (constant_string_id); |
264fa2db ZL |
2992 | |
2993 | /* Pre-build the following entities - for speed/convenience. */ | |
2994 | self_id = get_identifier ("self"); | |
2995 | ucmd_id = get_identifier ("_cmd"); | |
6408ef33 | 2996 | |
f05b9d93 NP |
2997 | /* Declare struct _objc_fast_enumeration_state { ... }; */ |
2998 | build_fast_enumeration_state_template (); | |
944fb799 | 2999 | |
f05b9d93 | 3000 | /* void objc_enumeration_mutation (id) */ |
491add72 NF |
3001 | type = build_function_type_list (void_type_node, |
3002 | objc_object_type, NULL_TREE); | |
944fb799 MS |
3003 | objc_enumeration_mutation_decl |
3004 | = add_builtin_function (TAG_ENUMERATION_MUTATION, type, 0, NOT_BUILT_IN, | |
f05b9d93 NP |
3005 | NULL, NULL_TREE); |
3006 | TREE_NOTHROW (objc_enumeration_mutation_decl) = 0; | |
3007 | ||
6408ef33 ZL |
3008 | #ifdef OBJCPLUS |
3009 | pop_lang_context (); | |
3010 | #endif | |
3011 | ||
3012 | write_symbols = save_write_symbols; | |
3013 | debug_hooks = save_hooks; | |
6c65299b RS |
3014 | } |
3015 | ||
d764a8e6 IS |
3016 | /* --- const strings --- */ |
3017 | ||
264fa2db ZL |
3018 | /* Ensure that the ivar list for NSConstantString/NXConstantString |
3019 | (or whatever was specified via `-fconstant-string-class') | |
3020 | contains fields at least as large as the following three, so that | |
3021 | the runtime can stomp on them with confidence: | |
c66c59d1 | 3022 | |
011d50d9 | 3023 | struct STRING_OBJECT_CLASS_NAME |
c66c59d1 RH |
3024 | { |
3025 | Object isa; | |
3026 | char *cString; | |
3027 | unsigned int length; | |
3028 | }; */ | |
3029 | ||
264fa2db ZL |
3030 | static int |
3031 | check_string_class_template (void) | |
c66c59d1 | 3032 | { |
c64de75f | 3033 | tree field_decl = objc_get_class_ivars (constant_string_id); |
c66c59d1 | 3034 | |
264fa2db ZL |
3035 | #define AT_LEAST_AS_LARGE_AS(F, T) \ |
3036 | (F && TREE_CODE (F) == FIELD_DECL \ | |
c64de75f | 3037 | && (TREE_INT_CST_LOW (TYPE_SIZE (TREE_TYPE (F))) \ |
264fa2db | 3038 | >= TREE_INT_CST_LOW (TYPE_SIZE (T)))) |
c66c59d1 | 3039 | |
264fa2db ZL |
3040 | if (!AT_LEAST_AS_LARGE_AS (field_decl, ptr_type_node)) |
3041 | return 0; | |
c66c59d1 | 3042 | |
910ad8de | 3043 | field_decl = DECL_CHAIN (field_decl); |
264fa2db ZL |
3044 | if (!AT_LEAST_AS_LARGE_AS (field_decl, ptr_type_node)) |
3045 | return 0; | |
3046 | ||
910ad8de | 3047 | field_decl = DECL_CHAIN (field_decl); |
264fa2db | 3048 | return AT_LEAST_AS_LARGE_AS (field_decl, unsigned_type_node); |
c66c59d1 | 3049 | |
264fa2db | 3050 | #undef AT_LEAST_AS_LARGE_AS |
c66c59d1 RH |
3051 | } |
3052 | ||
264fa2db ZL |
3053 | /* Avoid calling `check_string_class_template ()' more than once. */ |
3054 | static GTY(()) int string_layout_checked; | |
3055 | ||
c64de75f ZL |
3056 | /* Construct an internal string layout to be used as a template for |
3057 | creating NSConstantString/NXConstantString instances. */ | |
3058 | ||
3059 | static tree | |
3060 | objc_build_internal_const_str_type (void) | |
3061 | { | |
3062 | tree type = (*lang_hooks.types.make_type) (RECORD_TYPE); | |
c2255bc4 AH |
3063 | tree fields = build_decl (input_location, |
3064 | FIELD_DECL, NULL_TREE, ptr_type_node); | |
3065 | tree field = build_decl (input_location, | |
3066 | FIELD_DECL, NULL_TREE, ptr_type_node); | |
c64de75f | 3067 | |
910ad8de | 3068 | DECL_CHAIN (field) = fields; fields = field; |
c2255bc4 AH |
3069 | field = build_decl (input_location, |
3070 | FIELD_DECL, NULL_TREE, unsigned_type_node); | |
910ad8de | 3071 | DECL_CHAIN (field) = fields; fields = field; |
c64de75f ZL |
3072 | /* NB: The finish_builtin_struct() routine expects FIELD_DECLs in |
3073 | reverse order! */ | |
3074 | finish_builtin_struct (type, "__builtin_ObjCString", | |
3075 | fields, NULL_TREE); | |
3076 | ||
3077 | return type; | |
3078 | } | |
3079 | ||
e31c7eec TW |
3080 | /* Custom build_string which sets TREE_TYPE! */ |
3081 | ||
d764a8e6 | 3082 | tree |
011d50d9 | 3083 | my_build_string (int len, const char *str) |
6c65299b | 3084 | { |
b84a3874 | 3085 | return fix_string_type (build_string (len, str)); |
e31c7eec TW |
3086 | } |
3087 | ||
46bdb9cf JM |
3088 | /* Build a string with contents STR and length LEN and convert it to a |
3089 | pointer. */ | |
3090 | ||
d764a8e6 | 3091 | tree |
46bdb9cf JM |
3092 | my_build_string_pointer (int len, const char *str) |
3093 | { | |
3094 | tree string = my_build_string (len, str); | |
3095 | tree ptrtype = build_pointer_type (TREE_TYPE (TREE_TYPE (string))); | |
3096 | return build1 (ADDR_EXPR, ptrtype, string); | |
3097 | } | |
6408ef33 ZL |
3098 | |
3099 | static hashval_t | |
3100 | string_hash (const void *ptr) | |
3101 | { | |
741ac903 | 3102 | const_tree const str = ((const struct string_descriptor *)ptr)->literal; |
6408ef33 ZL |
3103 | const unsigned char *p = (const unsigned char *) TREE_STRING_POINTER (str); |
3104 | int i, len = TREE_STRING_LENGTH (str); | |
3105 | hashval_t h = len; | |
3106 | ||
3107 | for (i = 0; i < len; i++) | |
3108 | h = ((h * 613) + p[i]); | |
3109 | ||
3110 | return h; | |
3111 | } | |
3112 | ||
3113 | static int | |
3114 | string_eq (const void *ptr1, const void *ptr2) | |
3115 | { | |
741ac903 KG |
3116 | const_tree const str1 = ((const struct string_descriptor *)ptr1)->literal; |
3117 | const_tree const str2 = ((const struct string_descriptor *)ptr2)->literal; | |
6408ef33 ZL |
3118 | int len1 = TREE_STRING_LENGTH (str1); |
3119 | ||
3120 | return (len1 == TREE_STRING_LENGTH (str2) | |
3121 | && !memcmp (TREE_STRING_POINTER (str1), TREE_STRING_POINTER (str2), | |
3122 | len1)); | |
3123 | } | |
3124 | ||
264fa2db ZL |
3125 | /* Given a chain of STRING_CST's, build a static instance of |
3126 | NXConstantString which points at the concatenation of those | |
3127 | strings. We place the string object in the __string_objects | |
3128 | section of the __OBJC segment. The Objective-C runtime will | |
3129 | initialize the isa pointers of the string objects to point at the | |
3130 | NXConstantString class object. */ | |
e31c7eec TW |
3131 | |
3132 | tree | |
57a6af27 | 3133 | objc_build_string_object (tree string) |
e31c7eec | 3134 | { |
26705988 | 3135 | tree constant_string_class; |
e31c7eec | 3136 | int length; |
d764a8e6 | 3137 | tree addr; |
6408ef33 ZL |
3138 | struct string_descriptor *desc, key; |
3139 | void **loc; | |
e31c7eec | 3140 | |
6408ef33 | 3141 | /* Prep the string argument. */ |
264fa2db | 3142 | string = fix_string_type (string); |
264fa2db | 3143 | TREE_SET_CODE (string, STRING_CST); |
e31c7eec TW |
3144 | length = TREE_STRING_LENGTH (string) - 1; |
3145 | ||
944fb799 MS |
3146 | /* The target may have different ideas on how to construct an ObjC string |
3147 | literal. On Darwin (Mac OS X), for example, we may wish to obtain a | |
26705988 IS |
3148 | constant CFString reference instead. |
3149 | At present, this is only supported for the NeXT runtime. */ | |
944fb799 | 3150 | if (flag_next_runtime |
d764a8e6 | 3151 | && targetcm.objc_construct_string_object) |
26705988 | 3152 | { |
91ebb981 | 3153 | tree constructor = (*targetcm.objc_construct_string_object) (string); |
26705988 IS |
3154 | if (constructor) |
3155 | return build1 (NOP_EXPR, objc_object_type, constructor); | |
3156 | } | |
3157 | ||
6408ef33 ZL |
3158 | /* Check whether the string class being used actually exists and has the |
3159 | correct ivar layout. */ | |
264fa2db ZL |
3160 | if (!string_layout_checked) |
3161 | { | |
6408ef33 ZL |
3162 | string_layout_checked = -1; |
3163 | constant_string_class = lookup_interface (constant_string_id); | |
c64de75f | 3164 | internal_const_str_type = objc_build_internal_const_str_type (); |
6408ef33 ZL |
3165 | |
3166 | if (!constant_string_class | |
3167 | || !(constant_string_type | |
3168 | = CLASS_STATIC_TEMPLATE (constant_string_class))) | |
f41c4af3 JM |
3169 | error ("cannot find interface declaration for %qE", |
3170 | constant_string_id); | |
6408ef33 ZL |
3171 | /* The NSConstantString/NXConstantString ivar layout is now known. */ |
3172 | else if (!check_string_class_template ()) | |
f41c4af3 JM |
3173 | error ("interface %qE does not have valid constant string layout", |
3174 | constant_string_id); | |
d764a8e6 IS |
3175 | /* If the runtime can generate a literal reference to the string class, |
3176 | don't need to run a constructor. */ | |
3177 | else if (!(*runtime.setup_const_string_class_decl)()) | |
3178 | error ("cannot find reference tag for class %qE", constant_string_id); | |
6408ef33 | 3179 | else |
fa340504 | 3180 | { |
6408ef33 ZL |
3181 | string_layout_checked = 1; /* Success! */ |
3182 | add_class_reference (constant_string_id); | |
fa340504 | 3183 | } |
fa340504 SS |
3184 | } |
3185 | ||
6408ef33 ZL |
3186 | if (string_layout_checked == -1) |
3187 | return error_mark_node; | |
89ef1046 | 3188 | |
6408ef33 ZL |
3189 | /* Perhaps we already constructed a constant string just like this one? */ |
3190 | key.literal = string; | |
3191 | loc = htab_find_slot (string_htab, &key, INSERT); | |
e1e4cdc4 | 3192 | desc = (struct string_descriptor *) *loc; |
6408ef33 ZL |
3193 | |
3194 | if (!desc) | |
51900510 | 3195 | { |
a9429e29 | 3196 | *loc = desc = ggc_alloc_string_descriptor (); |
6408ef33 | 3197 | desc->literal = string; |
944fb799 | 3198 | desc->constructor = |
d764a8e6 | 3199 | (*runtime.build_const_string_constructor) (input_location, string, length); |
51900510 RK |
3200 | } |
3201 | ||
c64de75f | 3202 | addr = convert (build_pointer_type (constant_string_type), |
c9f9eb5d AH |
3203 | build_unary_op (input_location, |
3204 | ADDR_EXPR, desc->constructor, 1)); | |
6408ef33 ZL |
3205 | |
3206 | return addr; | |
4cb8c14b RK |
3207 | } |
3208 | ||
89ef1046 RS |
3209 | /* Build a static constant CONSTRUCTOR |
3210 | with type TYPE and elements ELTS. */ | |
3211 | ||
d764a8e6 | 3212 | tree |
076a7055 | 3213 | objc_build_constructor (tree type, VEC(constructor_elt,gc) *elts) |
89ef1046 | 3214 | { |
076a7055 | 3215 | tree constructor = build_constructor (type, elts); |
ff1c8a1a | 3216 | |
e31c7eec TW |
3217 | TREE_CONSTANT (constructor) = 1; |
3218 | TREE_STATIC (constructor) = 1; | |
3219 | TREE_READONLY (constructor) = 1; | |
3220 | ||
264fa2db | 3221 | #ifdef OBJCPLUS |
6408ef33 ZL |
3222 | /* Adjust for impedance mismatch. We should figure out how to build |
3223 | CONSTRUCTORs that consistently please both the C and C++ gods. */ | |
263d02e2 | 3224 | if (!VEC_index (constructor_elt, elts, 0)->index) |
7ce841d2 | 3225 | TREE_TYPE (constructor) = init_list_type_node; |
264fa2db | 3226 | #endif |
6408ef33 | 3227 | |
89ef1046 | 3228 | return constructor; |
6c65299b | 3229 | } |
af35aeb2 | 3230 | |
d764a8e6 | 3231 | /* Return the DECL of the string IDENT in the SECTION. */ |
6c65299b | 3232 | |
d764a8e6 IS |
3233 | tree |
3234 | get_objc_string_decl (tree ident, enum string_section section) | |
6c65299b | 3235 | { |
d764a8e6 | 3236 | tree chain; |
6c65299b | 3237 | |
d764a8e6 | 3238 | switch (section) |
264fa2db | 3239 | { |
d764a8e6 IS |
3240 | case class_names: |
3241 | chain = class_names_chain; | |
3242 | break; | |
3243 | case meth_var_names: | |
3244 | chain = meth_var_names_chain; | |
3245 | break; | |
3246 | case meth_var_types: | |
3247 | chain = meth_var_types_chain; | |
3248 | break; | |
3249 | case prop_names_attr: | |
3250 | chain = prop_names_attr_chain; | |
3251 | break; | |
3252 | default: | |
3253 | gcc_unreachable (); | |
264fa2db | 3254 | } |
6c65299b | 3255 | |
d764a8e6 IS |
3256 | for (; chain != 0; chain = TREE_CHAIN (chain)) |
3257 | if (TREE_VALUE (chain) == ident) | |
3258 | return (TREE_PURPOSE (chain)); | |
3259 | ||
3260 | /* We didn't find the entry. */ | |
3261 | return NULL_TREE; | |
6c65299b RS |
3262 | } |
3263 | ||
d764a8e6 IS |
3264 | /* Create a class reference, but don't create a variable to reference |
3265 | it. */ | |
af35aeb2 | 3266 | |
d764a8e6 IS |
3267 | void |
3268 | add_class_reference (tree ident) | |
6c65299b | 3269 | { |
d764a8e6 | 3270 | tree chain; |
6c65299b | 3271 | |
d764a8e6 | 3272 | if ((chain = cls_ref_chain)) |
e335b3ee | 3273 | { |
d764a8e6 IS |
3274 | tree tail; |
3275 | do | |
3276 | { | |
3277 | if (ident == TREE_VALUE (chain)) | |
3278 | return; | |
e335b3ee | 3279 | |
d764a8e6 IS |
3280 | tail = chain; |
3281 | chain = TREE_CHAIN (chain); | |
3282 | } | |
3283 | while (chain); | |
e335b3ee | 3284 | |
d764a8e6 IS |
3285 | /* Append to the end of the list */ |
3286 | TREE_CHAIN (tail) = tree_cons (NULL_TREE, ident, NULL_TREE); | |
3287 | } | |
3288 | else | |
3289 | cls_ref_chain = tree_cons (NULL_TREE, ident, NULL_TREE); | |
6c65299b RS |
3290 | } |
3291 | ||
d764a8e6 IS |
3292 | /* Get a class reference, creating it if necessary. Also create the |
3293 | reference variable. */ | |
3294 | tree | |
3295 | objc_get_class_reference (tree ident) | |
6c65299b | 3296 | { |
d764a8e6 IS |
3297 | tree orig_ident = (DECL_P (ident) |
3298 | ? DECL_NAME (ident) | |
3299 | : TYPE_P (ident) | |
3300 | ? OBJC_TYPE_NAME (ident) | |
3301 | : ident); | |
3302 | bool local_scope = false; | |
6c65299b | 3303 | |
d764a8e6 IS |
3304 | #ifdef OBJCPLUS |
3305 | if (processing_template_decl) | |
3306 | /* Must wait until template instantiation time. */ | |
3307 | return build_min_nt (CLASS_REFERENCE_EXPR, ident); | |
3308 | #endif | |
6c65299b | 3309 | |
d764a8e6 IS |
3310 | if (TREE_CODE (ident) == TYPE_DECL) |
3311 | ident = (DECL_ORIGINAL_TYPE (ident) | |
3312 | ? DECL_ORIGINAL_TYPE (ident) | |
3313 | : TREE_TYPE (ident)); | |
6c65299b | 3314 | |
d764a8e6 IS |
3315 | #ifdef OBJCPLUS |
3316 | if (TYPE_P (ident) | |
3317 | && CP_TYPE_CONTEXT (ident) != global_namespace) | |
3318 | local_scope = true; | |
3319 | #endif | |
6c65299b | 3320 | |
d764a8e6 | 3321 | if (local_scope || !(ident = objc_is_class_name (ident))) |
076a7055 | 3322 | { |
d764a8e6 IS |
3323 | error ("%qE is not an Objective-C class name or alias", |
3324 | orig_ident); | |
3325 | return error_mark_node; | |
076a7055 | 3326 | } |
6c65299b | 3327 | |
d764a8e6 IS |
3328 | return (*runtime.get_class_reference) (ident); |
3329 | } | |
6c65299b | 3330 | |
d764a8e6 IS |
3331 | void |
3332 | objc_declare_alias (tree alias_ident, tree class_ident) | |
3333 | { | |
3334 | tree underlying_class; | |
6c65299b | 3335 | |
d764a8e6 IS |
3336 | #ifdef OBJCPLUS |
3337 | if (current_namespace != global_namespace) { | |
3338 | error ("Objective-C declarations may only appear in global scope"); | |
3339 | } | |
3340 | #endif /* OBJCPLUS */ | |
6c65299b | 3341 | |
d764a8e6 IS |
3342 | if (!(underlying_class = objc_is_class_name (class_ident))) |
3343 | warning (0, "cannot find class %qE", class_ident); | |
3344 | else if (objc_is_class_name (alias_ident)) | |
3345 | warning (0, "class %qE already exists", alias_ident); | |
3346 | else | |
89ef1046 | 3347 | { |
d764a8e6 IS |
3348 | /* Implement @compatibility_alias as a typedef. */ |
3349 | #ifdef OBJCPLUS | |
3350 | push_lang_context (lang_name_c); /* extern "C" */ | |
3351 | #endif | |
3352 | lang_hooks.decls.pushdecl (build_decl | |
3353 | (input_location, | |
3354 | TYPE_DECL, | |
3355 | alias_ident, | |
3356 | xref_tag (RECORD_TYPE, underlying_class))); | |
3357 | #ifdef OBJCPLUS | |
3358 | pop_lang_context (); | |
3359 | #endif | |
944fb799 | 3360 | hash_class_name_enter (als_name_hash_list, alias_ident, |
d764a8e6 | 3361 | underlying_class); |
89ef1046 | 3362 | } |
6c65299b RS |
3363 | } |
3364 | ||
d764a8e6 | 3365 | void |
32dabdaf | 3366 | objc_declare_class (tree identifier) |
264fa2db | 3367 | { |
d764a8e6 IS |
3368 | #ifdef OBJCPLUS |
3369 | if (current_namespace != global_namespace) { | |
3370 | error ("Objective-C declarations may only appear in global scope"); | |
3371 | } | |
3372 | #endif /* OBJCPLUS */ | |
6408ef33 | 3373 | |
32dabdaf | 3374 | if (! objc_is_class_name (identifier)) |
d764a8e6 | 3375 | { |
32dabdaf | 3376 | tree record = lookup_name (identifier), type = record; |
944fb799 | 3377 | |
32dabdaf | 3378 | if (record) |
d764a8e6 | 3379 | { |
32dabdaf NP |
3380 | if (TREE_CODE (record) == TYPE_DECL) |
3381 | type = DECL_ORIGINAL_TYPE (record) | |
3382 | ? DECL_ORIGINAL_TYPE (record) | |
3383 | : TREE_TYPE (record); | |
944fb799 | 3384 | |
32dabdaf NP |
3385 | if (!TYPE_HAS_OBJC_INFO (type) |
3386 | || !TYPE_OBJC_INTERFACE (type)) | |
d764a8e6 | 3387 | { |
32dabdaf NP |
3388 | error ("%qE redeclared as different kind of symbol", |
3389 | identifier); | |
3390 | error ("previous declaration of %q+D", | |
3391 | record); | |
d764a8e6 | 3392 | } |
6c65299b | 3393 | } |
944fb799 | 3394 | |
32dabdaf NP |
3395 | record = xref_tag (RECORD_TYPE, identifier); |
3396 | INIT_TYPE_OBJC_INFO (record); | |
3397 | /* In the case of a @class declaration, we store the ident in | |
3398 | the TYPE_OBJC_INTERFACE. If later an @interface is found, | |
3399 | we'll replace the ident with the interface. */ | |
3400 | TYPE_OBJC_INTERFACE (record) = identifier; | |
3401 | hash_class_name_enter (cls_name_hash_list, identifier, NULL_TREE); | |
6c65299b | 3402 | } |
6c65299b RS |
3403 | } |
3404 | ||
d764a8e6 IS |
3405 | tree |
3406 | objc_is_class_name (tree ident) | |
6c65299b | 3407 | { |
d764a8e6 | 3408 | hash target; |
6c65299b | 3409 | |
0d8a2528 NP |
3410 | if (ident && TREE_CODE (ident) == IDENTIFIER_NODE) |
3411 | { | |
3412 | tree t = identifier_global_value (ident); | |
3413 | if (t) | |
3414 | ident = t; | |
3415 | } | |
3416 | ||
d764a8e6 IS |
3417 | while (ident && TREE_CODE (ident) == TYPE_DECL && DECL_ORIGINAL_TYPE (ident)) |
3418 | ident = OBJC_TYPE_NAME (DECL_ORIGINAL_TYPE (ident)); | |
6408ef33 | 3419 | |
d764a8e6 IS |
3420 | if (ident && TREE_CODE (ident) == RECORD_TYPE) |
3421 | ident = OBJC_TYPE_NAME (ident); | |
6408ef33 | 3422 | #ifdef OBJCPLUS |
d764a8e6 IS |
3423 | if (ident && TREE_CODE (ident) == TYPE_DECL) |
3424 | { | |
3425 | tree type = TREE_TYPE (ident); | |
3426 | if (type && TREE_CODE (type) == TEMPLATE_TYPE_PARM) | |
3427 | return NULL_TREE; | |
3428 | ident = DECL_NAME (ident); | |
3429 | } | |
6408ef33 | 3430 | #endif |
d764a8e6 IS |
3431 | if (!ident || TREE_CODE (ident) != IDENTIFIER_NODE) |
3432 | return NULL_TREE; | |
6c65299b | 3433 | |
d764a8e6 IS |
3434 | if (lookup_interface (ident)) |
3435 | return ident; | |
6c65299b | 3436 | |
d764a8e6 IS |
3437 | target = hash_class_name_lookup (cls_name_hash_list, ident); |
3438 | if (target) | |
3439 | return target->key; | |
6c65299b | 3440 | |
d764a8e6 IS |
3441 | target = hash_class_name_lookup (als_name_hash_list, ident); |
3442 | if (target) | |
3443 | { | |
3444 | gcc_assert (target->list && target->list->value); | |
3445 | return target->list->value; | |
3446 | } | |
6408ef33 | 3447 | |
d764a8e6 | 3448 | return 0; |
6408ef33 ZL |
3449 | } |
3450 | ||
d764a8e6 | 3451 | /* Check whether TYPE is either 'id' or 'Class'. */ |
6c65299b | 3452 | |
d764a8e6 IS |
3453 | tree |
3454 | objc_is_id (tree type) | |
6408ef33 | 3455 | { |
0d8a2528 NP |
3456 | if (type && TREE_CODE (type) == IDENTIFIER_NODE) |
3457 | { | |
3458 | tree t = identifier_global_value (type); | |
3459 | if (t) | |
3460 | type = t; | |
3461 | } | |
6c65299b | 3462 | |
d764a8e6 IS |
3463 | if (type && TREE_CODE (type) == TYPE_DECL) |
3464 | type = TREE_TYPE (type); | |
6c65299b | 3465 | |
d764a8e6 IS |
3466 | /* NB: This function may be called before the ObjC front-end has |
3467 | been initialized, in which case OBJC_OBJECT_TYPE will (still) be NULL. */ | |
3468 | return (objc_object_type && type | |
3469 | && (IS_ID (type) || IS_CLASS (type) || IS_SUPER (type)) | |
3470 | ? type | |
3471 | : NULL_TREE); | |
6408ef33 | 3472 | } |
e31c7eec | 3473 | |
d764a8e6 IS |
3474 | /* Check whether TYPE is either 'id', 'Class', or a pointer to an ObjC |
3475 | class instance. This is needed by other parts of the compiler to | |
3476 | handle ObjC types gracefully. */ | |
6408ef33 | 3477 | |
d764a8e6 IS |
3478 | tree |
3479 | objc_is_object_ptr (tree type) | |
6408ef33 | 3480 | { |
d764a8e6 | 3481 | tree ret; |
6408ef33 | 3482 | |
d764a8e6 IS |
3483 | type = TYPE_MAIN_VARIANT (type); |
3484 | if (!POINTER_TYPE_P (type)) | |
3485 | return 0; | |
6408ef33 | 3486 | |
d764a8e6 IS |
3487 | ret = objc_is_id (type); |
3488 | if (!ret) | |
3489 | ret = objc_is_class_name (TREE_TYPE (type)); | |
6408ef33 | 3490 | |
d764a8e6 | 3491 | return ret; |
6c65299b | 3492 | } |
51900510 | 3493 | |
d764a8e6 IS |
3494 | static int |
3495 | objc_is_gcable_type (tree type, int or_strong_p) | |
4cb8c14b | 3496 | { |
d764a8e6 | 3497 | tree name; |
4cb8c14b | 3498 | |
d764a8e6 IS |
3499 | if (!TYPE_P (type)) |
3500 | return 0; | |
3501 | if (objc_is_id (TYPE_MAIN_VARIANT (type))) | |
3502 | return 1; | |
3503 | if (or_strong_p && lookup_attribute ("objc_gc", TYPE_ATTRIBUTES (type))) | |
3504 | return 1; | |
3505 | if (TREE_CODE (type) != POINTER_TYPE && TREE_CODE (type) != INDIRECT_REF) | |
3506 | return 0; | |
3507 | type = TREE_TYPE (type); | |
3508 | if (TREE_CODE (type) != RECORD_TYPE) | |
3509 | return 0; | |
3510 | name = TYPE_NAME (type); | |
3511 | return (objc_is_class_name (name) != NULL_TREE); | |
4cb8c14b RK |
3512 | } |
3513 | ||
d764a8e6 IS |
3514 | static tree |
3515 | objc_substitute_decl (tree expr, tree oldexpr, tree newexpr) | |
4cb8c14b | 3516 | { |
d764a8e6 IS |
3517 | if (expr == oldexpr) |
3518 | return newexpr; | |
4cb8c14b | 3519 | |
d764a8e6 | 3520 | switch (TREE_CODE (expr)) |
4cb8c14b | 3521 | { |
d764a8e6 IS |
3522 | case COMPONENT_REF: |
3523 | return objc_build_component_ref | |
3524 | (objc_substitute_decl (TREE_OPERAND (expr, 0), | |
3525 | oldexpr, | |
3526 | newexpr), | |
3527 | DECL_NAME (TREE_OPERAND (expr, 1))); | |
3528 | case ARRAY_REF: | |
3529 | return build_array_ref (input_location, | |
3530 | objc_substitute_decl (TREE_OPERAND (expr, 0), | |
3531 | oldexpr, | |
3532 | newexpr), | |
3533 | TREE_OPERAND (expr, 1)); | |
3534 | case INDIRECT_REF: | |
3535 | return build_indirect_ref (input_location, | |
3536 | objc_substitute_decl (TREE_OPERAND (expr, 0), | |
3537 | oldexpr, | |
3538 | newexpr), RO_ARROW); | |
3539 | default: | |
3540 | return expr; | |
4cb8c14b | 3541 | } |
4cb8c14b RK |
3542 | } |
3543 | ||
6c65299b | 3544 | static tree |
d764a8e6 | 3545 | objc_build_ivar_assignment (tree outervar, tree lhs, tree rhs) |
6c65299b | 3546 | { |
d764a8e6 IS |
3547 | tree func_params; |
3548 | /* The LHS parameter contains the expression 'outervar->memberspec'; | |
3549 | we need to transform it into '&((typeof(outervar) *) 0)->memberspec', | |
3550 | where memberspec may be arbitrarily complex (e.g., 'g->f.d[2].g[3]'). | |
3551 | */ | |
3552 | tree offs | |
3553 | = objc_substitute_decl | |
3554 | (lhs, outervar, convert (TREE_TYPE (outervar), integer_zero_node)); | |
3555 | tree func | |
3556 | = (flag_objc_direct_dispatch | |
3557 | ? objc_assign_ivar_fast_decl | |
3558 | : objc_assign_ivar_decl); | |
6c65299b | 3559 | |
d764a8e6 IS |
3560 | offs = convert (integer_type_node, build_unary_op (input_location, |
3561 | ADDR_EXPR, offs, 0)); | |
3562 | offs = fold (offs); | |
3563 | func_params = tree_cons (NULL_TREE, | |
3564 | convert (objc_object_type, rhs), | |
3565 | tree_cons (NULL_TREE, convert (objc_object_type, outervar), | |
3566 | tree_cons (NULL_TREE, offs, | |
3567 | NULL_TREE))); | |
6c65299b | 3568 | |
d764a8e6 IS |
3569 | assemble_external (func); |
3570 | return build_function_call (input_location, func, func_params); | |
6408ef33 | 3571 | } |
6c65299b | 3572 | |
d764a8e6 IS |
3573 | static tree |
3574 | objc_build_global_assignment (tree lhs, tree rhs) | |
6408ef33 | 3575 | { |
d764a8e6 IS |
3576 | tree func_params = tree_cons (NULL_TREE, |
3577 | convert (objc_object_type, rhs), | |
3578 | tree_cons (NULL_TREE, convert (build_pointer_type (objc_object_type), | |
3579 | build_unary_op (input_location, ADDR_EXPR, lhs, 0)), | |
3580 | NULL_TREE)); | |
e31c7eec | 3581 | |
d764a8e6 | 3582 | assemble_external (objc_assign_global_decl); |
944fb799 | 3583 | return build_function_call (input_location, |
d764a8e6 | 3584 | objc_assign_global_decl, func_params); |
6c65299b | 3585 | } |
e31c7eec | 3586 | |
e31c7eec | 3587 | static tree |
d764a8e6 | 3588 | objc_build_strong_cast_assignment (tree lhs, tree rhs) |
e31c7eec | 3589 | { |
d764a8e6 IS |
3590 | tree func_params = tree_cons (NULL_TREE, |
3591 | convert (objc_object_type, rhs), | |
3592 | tree_cons (NULL_TREE, convert (build_pointer_type (objc_object_type), | |
3593 | build_unary_op (input_location, ADDR_EXPR, lhs, 0)), | |
3594 | NULL_TREE)); | |
3595 | ||
3596 | assemble_external (objc_assign_strong_cast_decl); | |
3597 | return build_function_call (input_location, | |
3598 | objc_assign_strong_cast_decl, func_params); | |
e31c7eec TW |
3599 | } |
3600 | ||
d764a8e6 IS |
3601 | static int |
3602 | objc_is_gcable_p (tree expr) | |
6c65299b | 3603 | { |
d764a8e6 IS |
3604 | return (TREE_CODE (expr) == COMPONENT_REF |
3605 | ? objc_is_gcable_p (TREE_OPERAND (expr, 1)) | |
3606 | : TREE_CODE (expr) == ARRAY_REF | |
3607 | ? (objc_is_gcable_p (TREE_TYPE (expr)) | |
3608 | || objc_is_gcable_p (TREE_OPERAND (expr, 0))) | |
3609 | : TREE_CODE (expr) == ARRAY_TYPE | |
3610 | ? objc_is_gcable_p (TREE_TYPE (expr)) | |
3611 | : TYPE_P (expr) | |
3612 | ? objc_is_gcable_type (expr, 1) | |
3613 | : (objc_is_gcable_p (TREE_TYPE (expr)) | |
3614 | || (DECL_P (expr) | |
3615 | && lookup_attribute ("objc_gc", DECL_ATTRIBUTES (expr))))); | |
058bfe53 IS |
3616 | } |
3617 | ||
d764a8e6 IS |
3618 | static int |
3619 | objc_is_ivar_reference_p (tree expr) | |
058bfe53 | 3620 | { |
d764a8e6 IS |
3621 | return (TREE_CODE (expr) == ARRAY_REF |
3622 | ? objc_is_ivar_reference_p (TREE_OPERAND (expr, 0)) | |
3623 | : TREE_CODE (expr) == COMPONENT_REF | |
3624 | ? TREE_CODE (TREE_OPERAND (expr, 1)) == FIELD_DECL | |
3625 | : 0); | |
058bfe53 IS |
3626 | } |
3627 | ||
d764a8e6 IS |
3628 | static int |
3629 | objc_is_global_reference_p (tree expr) | |
058bfe53 | 3630 | { |
d764a8e6 IS |
3631 | return (TREE_CODE (expr) == INDIRECT_REF || TREE_CODE (expr) == PLUS_EXPR |
3632 | ? objc_is_global_reference_p (TREE_OPERAND (expr, 0)) | |
3633 | : DECL_P (expr) | |
3634 | ? (DECL_FILE_SCOPE_P (expr) || TREE_STATIC (expr)) | |
3635 | : 0); | |
3636 | } | |
058bfe53 | 3637 | |
d764a8e6 IS |
3638 | tree |
3639 | objc_generate_write_barrier (tree lhs, enum tree_code modifycode, tree rhs) | |
3640 | { | |
3641 | tree result = NULL_TREE, outer; | |
3642 | int strong_cast_p = 0, outer_gc_p = 0, indirect_p = 0; | |
058bfe53 | 3643 | |
d764a8e6 IS |
3644 | /* This function is currently only used with the next runtime with |
3645 | garbage collection enabled (-fobjc-gc). */ | |
3646 | gcc_assert (flag_next_runtime); | |
058bfe53 | 3647 | |
d764a8e6 IS |
3648 | /* See if we have any lhs casts, and strip them out. NB: The lvalue casts |
3649 | will have been transformed to the form '*(type *)&expr'. */ | |
3650 | if (TREE_CODE (lhs) == INDIRECT_REF) | |
3651 | { | |
3652 | outer = TREE_OPERAND (lhs, 0); | |
058bfe53 | 3653 | |
d764a8e6 IS |
3654 | while (!strong_cast_p |
3655 | && (CONVERT_EXPR_P (outer) | |
3656 | || TREE_CODE (outer) == NON_LVALUE_EXPR)) | |
5d0f30f7 | 3657 | { |
d764a8e6 | 3658 | tree lhstype = TREE_TYPE (outer); |
011d50d9 | 3659 | |
d764a8e6 IS |
3660 | /* Descend down the cast chain, and record the first objc_gc |
3661 | attribute found. */ | |
3662 | if (POINTER_TYPE_P (lhstype)) | |
3663 | { | |
3664 | tree attr | |
3665 | = lookup_attribute ("objc_gc", | |
3666 | TYPE_ATTRIBUTES (TREE_TYPE (lhstype))); | |
6c65299b | 3667 | |
d764a8e6 IS |
3668 | if (attr) |
3669 | strong_cast_p = 1; | |
3670 | } | |
076a7055 | 3671 | |
d764a8e6 | 3672 | outer = TREE_OPERAND (outer, 0); |
076a7055 | 3673 | } |
e31c7eec | 3674 | } |
e31c7eec | 3675 | |
d764a8e6 IS |
3676 | /* If we have a __strong cast, it trumps all else. */ |
3677 | if (strong_cast_p) | |
5d0f30f7 | 3678 | { |
d764a8e6 IS |
3679 | if (modifycode != NOP_EXPR) |
3680 | goto invalid_pointer_arithmetic; | |
e31c7eec | 3681 | |
d764a8e6 IS |
3682 | if (warn_assign_intercept) |
3683 | warning (0, "strong-cast assignment has been intercepted"); | |
5d0f30f7 | 3684 | |
d764a8e6 | 3685 | result = objc_build_strong_cast_assignment (lhs, rhs); |
51900510 | 3686 | |
d764a8e6 | 3687 | goto exit_point; |
5d0f30f7 KKT |
3688 | } |
3689 | ||
d764a8e6 IS |
3690 | /* the lhs must be of a suitable type, regardless of its underlying |
3691 | structure. */ | |
3692 | if (!objc_is_gcable_p (lhs)) | |
3693 | goto exit_point; | |
5d0f30f7 | 3694 | |
d764a8e6 | 3695 | outer = lhs; |
5d0f30f7 | 3696 | |
d764a8e6 IS |
3697 | while (outer |
3698 | && (TREE_CODE (outer) == COMPONENT_REF | |
3699 | || TREE_CODE (outer) == ARRAY_REF)) | |
3700 | outer = TREE_OPERAND (outer, 0); | |
e31c7eec | 3701 | |
d764a8e6 | 3702 | if (TREE_CODE (outer) == INDIRECT_REF) |
e31c7eec | 3703 | { |
d764a8e6 IS |
3704 | outer = TREE_OPERAND (outer, 0); |
3705 | indirect_p = 1; | |
e31c7eec TW |
3706 | } |
3707 | ||
d764a8e6 | 3708 | outer_gc_p = objc_is_gcable_p (outer); |
e31c7eec | 3709 | |
d764a8e6 IS |
3710 | /* Handle ivar assignments. */ |
3711 | if (objc_is_ivar_reference_p (lhs)) | |
3712 | { | |
3713 | /* if the struct to the left of the ivar is not an Objective-C object (__strong | |
3714 | doesn't cut it here), the best we can do here is suggest a cast. */ | |
3715 | if (!objc_is_gcable_type (TREE_TYPE (outer), 0)) | |
3716 | { | |
3717 | /* We may still be able to use the global write barrier... */ | |
3718 | if (!indirect_p && objc_is_global_reference_p (outer)) | |
3719 | goto global_reference; | |
264fa2db | 3720 | |
d764a8e6 IS |
3721 | suggest_cast: |
3722 | if (modifycode == NOP_EXPR) | |
3723 | { | |
3724 | if (warn_assign_intercept) | |
3725 | warning (0, "strong-cast may possibly be needed"); | |
3726 | } | |
e31c7eec | 3727 | |
d764a8e6 IS |
3728 | goto exit_point; |
3729 | } | |
e31c7eec | 3730 | |
d764a8e6 IS |
3731 | if (modifycode != NOP_EXPR) |
3732 | goto invalid_pointer_arithmetic; | |
6c65299b | 3733 | |
d764a8e6 IS |
3734 | if (warn_assign_intercept) |
3735 | warning (0, "instance variable assignment has been intercepted"); | |
e31c7eec | 3736 | |
d764a8e6 | 3737 | result = objc_build_ivar_assignment (outer, lhs, rhs); |
6c65299b | 3738 | |
d764a8e6 IS |
3739 | goto exit_point; |
3740 | } | |
3741 | ||
3742 | /* Likewise, intercept assignment to global/static variables if their type is | |
3743 | GC-marked. */ | |
3744 | if (objc_is_global_reference_p (outer)) | |
6c65299b | 3745 | { |
d764a8e6 IS |
3746 | if (indirect_p) |
3747 | goto suggest_cast; | |
6c65299b | 3748 | |
d764a8e6 IS |
3749 | global_reference: |
3750 | if (modifycode != NOP_EXPR) | |
3751 | { | |
3752 | invalid_pointer_arithmetic: | |
3753 | if (outer_gc_p) | |
3754 | warning (0, "pointer arithmetic for garbage-collected objects not allowed"); | |
6c65299b | 3755 | |
d764a8e6 IS |
3756 | goto exit_point; |
3757 | } | |
3758 | ||
3759 | if (warn_assign_intercept) | |
3760 | warning (0, "global/static variable assignment has been intercepted"); | |
3761 | ||
3762 | result = objc_build_global_assignment (lhs, rhs); | |
6c65299b | 3763 | } |
d764a8e6 IS |
3764 | |
3765 | /* In all other cases, fall back to the normal mechanism. */ | |
3766 | exit_point: | |
3767 | return result; | |
6c65299b RS |
3768 | } |
3769 | ||
d764a8e6 IS |
3770 | struct GTY(()) interface_tuple { |
3771 | tree id; | |
3772 | tree class_name; | |
3773 | }; | |
264fa2db | 3774 | |
d764a8e6 | 3775 | static GTY ((param_is (struct interface_tuple))) htab_t interface_htab; |
d11dd684 | 3776 | |
d764a8e6 IS |
3777 | static hashval_t |
3778 | hash_interface (const void *p) | |
3779 | { | |
3780 | const struct interface_tuple *d = (const struct interface_tuple *) p; | |
3781 | return IDENTIFIER_HASH_VALUE (d->id); | |
3782 | } | |
3783 | ||
3784 | static int | |
3785 | eq_interface (const void *p1, const void *p2) | |
3786 | { | |
3787 | const struct interface_tuple *d = (const struct interface_tuple *) p1; | |
3788 | return d->id == p2; | |
3789 | } | |
38b9c8c3 | 3790 | |
d764a8e6 IS |
3791 | tree |
3792 | lookup_interface (tree ident) | |
3793 | { | |
d11dd684 | 3794 | #ifdef OBJCPLUS |
d764a8e6 IS |
3795 | if (ident && TREE_CODE (ident) == TYPE_DECL) |
3796 | ident = DECL_NAME (ident); | |
264fa2db | 3797 | #endif |
264fa2db | 3798 | |
d764a8e6 IS |
3799 | if (ident == NULL_TREE || TREE_CODE (ident) != IDENTIFIER_NODE) |
3800 | return NULL_TREE; | |
264fa2db | 3801 | |
d764a8e6 IS |
3802 | { |
3803 | struct interface_tuple **slot; | |
3804 | tree i = NULL_TREE; | |
6c65299b | 3805 | |
d764a8e6 IS |
3806 | if (interface_htab) |
3807 | { | |
3808 | slot = (struct interface_tuple **) | |
3809 | htab_find_slot_with_hash (interface_htab, ident, | |
3810 | IDENTIFIER_HASH_VALUE (ident), | |
3811 | NO_INSERT); | |
3812 | if (slot && *slot) | |
3813 | i = (*slot)->class_name; | |
3814 | } | |
3815 | return i; | |
3816 | } | |
3817 | } | |
51900510 | 3818 | |
0dc33c3c NP |
3819 | |
3820 | ||
d764a8e6 | 3821 | /* Implement @defs (<classname>) within struct bodies. */ |
6c65299b | 3822 | |
d764a8e6 IS |
3823 | tree |
3824 | objc_get_class_ivars (tree class_name) | |
3825 | { | |
3826 | tree interface = lookup_interface (class_name); | |
6c65299b | 3827 | |
d764a8e6 IS |
3828 | if (interface) |
3829 | return get_class_ivars (interface, true); | |
7651f8f7 | 3830 | |
d764a8e6 IS |
3831 | error ("cannot find interface declaration for %qE", |
3832 | class_name); | |
6c65299b | 3833 | |
d764a8e6 | 3834 | return error_mark_node; |
e31c7eec TW |
3835 | } |
3836 | ||
0dc33c3c NP |
3837 | |
3838 | /* Functions used by the hashtable for field duplicates in | |
3839 | objc_detect_field_duplicates(). Ideally, we'd use a standard | |
3840 | key-value dictionary hashtable , and store as keys the field names, | |
3841 | and as values the actual declarations (used to print nice error | |
3842 | messages with the locations). But, the hashtable we are using only | |
3843 | allows us to store keys in the hashtable, without values (it looks | |
3844 | more like a set). So, we store the DECLs, but define equality as | |
3845 | DECLs having the same name, and hash as the hash of the name. */ | |
3846 | static hashval_t | |
3847 | hash_instance_variable (const PTR p) | |
3848 | { | |
3849 | const_tree q = (const_tree)p; | |
3850 | return (hashval_t) ((intptr_t)(DECL_NAME (q)) >> 3); | |
3851 | } | |
3852 | ||
3853 | static int | |
3854 | eq_instance_variable (const PTR p1, const PTR p2) | |
3855 | { | |
3856 | const_tree a = (const_tree)p1; | |
3857 | const_tree b = (const_tree)p2; | |
3858 | return DECL_NAME (a) == DECL_NAME (b); | |
3859 | } | |
3860 | ||
d764a8e6 | 3861 | /* Called when checking the variables in a struct. If we are not |
0dc33c3c NP |
3862 | doing the ivars list inside an @interface context, then return |
3863 | false. Else, perform the check for duplicate ivars, then return | |
3864 | true. The check for duplicates checks if an instance variable with | |
3865 | the same name exists in the class or in a superclass. If | |
3866 | 'check_superclasses_only' is set to true, then it is assumed that | |
3867 | checks for instance variables in the same class has already been | |
3868 | performed (this is the case for ObjC++) and only the instance | |
3869 | variables of superclasses are checked. */ | |
3870 | bool | |
3871 | objc_detect_field_duplicates (bool check_superclasses_only) | |
d764a8e6 | 3872 | { |
944fb799 | 3873 | if (!objc_collecting_ivars || !objc_interface_context |
0dc33c3c NP |
3874 | || TREE_CODE (objc_interface_context) != CLASS_INTERFACE_TYPE) |
3875 | return false; | |
3876 | ||
3877 | /* We have two ways of doing this check: | |
944fb799 | 3878 | |
0dc33c3c NP |
3879 | "direct comparison": we iterate over the instance variables and |
3880 | compare them directly. This works great for small numbers of | |
3881 | instance variables (such as 10 or 20), which are extremely common. | |
3882 | But it will potentially take forever for the pathological case with | |
3883 | a huge number (eg, 10k) of instance variables. | |
944fb799 | 3884 | |
0dc33c3c NP |
3885 | "hashtable": we use a hashtable, which requires a single sweep |
3886 | through the list of instances variables. This is much slower for a | |
3887 | small number of variables, and we only use it for large numbers. | |
3888 | ||
3889 | To decide which one to use, we need to get an idea of how many | |
3890 | instance variables we have to compare. */ | |
3891 | { | |
3892 | unsigned int number_of_ivars_to_check = 0; | |
3893 | { | |
3894 | tree ivar; | |
3895 | for (ivar = CLASS_RAW_IVARS (objc_interface_context); | |
3896 | ivar; ivar = DECL_CHAIN (ivar)) | |
3897 | { | |
3898 | /* Ignore anonymous ivars. */ | |
3899 | if (DECL_NAME (ivar)) | |
3900 | number_of_ivars_to_check++; | |
3901 | } | |
3902 | } | |
d764a8e6 | 3903 | |
0dc33c3c NP |
3904 | /* Exit if there is nothing to do. */ |
3905 | if (number_of_ivars_to_check == 0) | |
3906 | return true; | |
944fb799 | 3907 | |
0dc33c3c NP |
3908 | /* In case that there are only 1 or 2 instance variables to check, |
3909 | we always use direct comparison. If there are more, it is | |
3910 | worth iterating over the instance variables in the superclass | |
3911 | to count how many there are (note that this has the same cost | |
3912 | as checking 1 instance variable by direct comparison, which is | |
3913 | why we skip this check in the case of 1 or 2 ivars and just do | |
3914 | the direct comparison) and then decide if it worth using a | |
3915 | hashtable. */ | |
3916 | if (number_of_ivars_to_check > 2) | |
3917 | { | |
3918 | unsigned int number_of_superclass_ivars = 0; | |
3919 | { | |
3920 | tree interface; | |
3921 | for (interface = lookup_interface (CLASS_SUPER_NAME (objc_interface_context)); | |
3922 | interface; interface = lookup_interface (CLASS_SUPER_NAME (interface))) | |
3923 | { | |
3924 | tree ivar; | |
3925 | for (ivar = CLASS_RAW_IVARS (interface); | |
3926 | ivar; ivar = DECL_CHAIN (ivar)) | |
3927 | number_of_superclass_ivars++; | |
3928 | } | |
3929 | } | |
3930 | ||
3931 | /* We use a hashtable if we have over 10k comparisons. */ | |
944fb799 | 3932 | if (number_of_ivars_to_check * (number_of_superclass_ivars |
0dc33c3c NP |
3933 | + (number_of_ivars_to_check / 2)) |
3934 | > 10000) | |
3935 | { | |
3936 | /* First, build the hashtable by putting all the instance | |
3937 | variables of superclasses in it. */ | |
3938 | htab_t htab = htab_create (37, hash_instance_variable, | |
3939 | eq_instance_variable, NULL); | |
3940 | tree interface; | |
3941 | for (interface = lookup_interface (CLASS_SUPER_NAME | |
3942 | (objc_interface_context)); | |
3943 | interface; interface = lookup_interface | |
3944 | (CLASS_SUPER_NAME (interface))) | |
3945 | { | |
3946 | tree ivar; | |
3947 | for (ivar = CLASS_RAW_IVARS (interface); ivar; | |
3948 | ivar = DECL_CHAIN (ivar)) | |
3949 | { | |
3950 | if (DECL_NAME (ivar) != NULL_TREE) | |
3951 | { | |
3952 | void **slot = htab_find_slot (htab, ivar, INSERT); | |
3953 | /* Do not check for duplicate instance | |
3954 | variables in superclasses. Errors have | |
3955 | already been generated. */ | |
3956 | *slot = ivar; | |
3957 | } | |
3958 | } | |
3959 | } | |
944fb799 | 3960 | |
0dc33c3c NP |
3961 | /* Now, we go through all the instance variables in the |
3962 | class, and check that they are not in the | |
3963 | hashtable. */ | |
3964 | if (check_superclasses_only) | |
3965 | { | |
3966 | tree ivar; | |
3967 | for (ivar = CLASS_RAW_IVARS (objc_interface_context); ivar; | |
3968 | ivar = DECL_CHAIN (ivar)) | |
3969 | { | |
3970 | if (DECL_NAME (ivar) != NULL_TREE) | |
3971 | { | |
3972 | tree duplicate_ivar = (tree)(htab_find (htab, ivar)); | |
3973 | if (duplicate_ivar != HTAB_EMPTY_ENTRY) | |
3974 | { | |
3975 | error_at (DECL_SOURCE_LOCATION (ivar), | |
3976 | "duplicate instance variable %q+D", | |
3977 | ivar); | |
3978 | inform (DECL_SOURCE_LOCATION (duplicate_ivar), | |
3979 | "previous declaration of %q+D", | |
3980 | duplicate_ivar); | |
3981 | /* FIXME: Do we need the following ? */ | |
3982 | /* DECL_NAME (ivar) = NULL_TREE; */ | |
3983 | } | |
3984 | } | |
3985 | } | |
3986 | } | |
3987 | else | |
3988 | { | |
3989 | /* If we're checking for duplicates in the class as | |
3990 | well, we insert variables in the hashtable as we | |
3991 | check them, so if a duplicate follows, it will be | |
3992 | caught. */ | |
3993 | tree ivar; | |
3994 | for (ivar = CLASS_RAW_IVARS (objc_interface_context); ivar; | |
3995 | ivar = DECL_CHAIN (ivar)) | |
3996 | { | |
3997 | if (DECL_NAME (ivar) != NULL_TREE) | |
3998 | { | |
3999 | void **slot = htab_find_slot (htab, ivar, INSERT); | |
4000 | if (*slot) | |
4001 | { | |
4002 | tree duplicate_ivar = (tree)(*slot); | |
4003 | error_at (DECL_SOURCE_LOCATION (ivar), | |
4004 | "duplicate instance variable %q+D", | |
4005 | ivar); | |
4006 | inform (DECL_SOURCE_LOCATION (duplicate_ivar), | |
4007 | "previous declaration of %q+D", | |
4008 | duplicate_ivar); | |
4009 | /* FIXME: Do we need the following ? */ | |
4010 | /* DECL_NAME (ivar) = NULL_TREE; */ | |
4011 | } | |
4012 | *slot = ivar; | |
4013 | } | |
4014 | } | |
4015 | } | |
4016 | htab_delete (htab); | |
4017 | return true; | |
4018 | } | |
4019 | } | |
4020 | } | |
944fb799 | 4021 | |
0dc33c3c NP |
4022 | /* This is the "direct comparison" approach, which is used in most |
4023 | non-pathological cases. */ | |
4024 | { | |
4025 | /* Walk up to class hierarchy, starting with this class (this is | |
4026 | the external loop, because lookup_interface() is expensive, and | |
4027 | we want to do it few times). */ | |
4028 | tree interface = objc_interface_context; | |
4029 | ||
4030 | if (check_superclasses_only) | |
4031 | interface = lookup_interface (CLASS_SUPER_NAME (interface)); | |
944fb799 | 4032 | |
0dc33c3c NP |
4033 | for ( ; interface; interface = lookup_interface |
4034 | (CLASS_SUPER_NAME (interface))) | |
4035 | { | |
4036 | tree ivar_being_checked; | |
4037 | ||
4038 | for (ivar_being_checked = CLASS_RAW_IVARS (objc_interface_context); | |
4039 | ivar_being_checked; | |
4040 | ivar_being_checked = DECL_CHAIN (ivar_being_checked)) | |
4041 | { | |
4042 | tree decl; | |
944fb799 | 4043 | |
0dc33c3c NP |
4044 | /* Ignore anonymous ivars. */ |
4045 | if (DECL_NAME (ivar_being_checked) == NULL_TREE) | |
4046 | continue; | |
4047 | ||
4048 | /* Note how we stop when we find the ivar we are checking | |
4049 | (this can only happen in the main class, not | |
4050 | superclasses), to avoid comparing things twice | |
4051 | (otherwise, for each ivar, you'd compare A to B then B | |
4052 | to A, and get duplicated error messages). */ | |
4053 | for (decl = CLASS_RAW_IVARS (interface); | |
4054 | decl && decl != ivar_being_checked; | |
4055 | decl = DECL_CHAIN (decl)) | |
4056 | { | |
4057 | if (DECL_NAME (ivar_being_checked) == DECL_NAME (decl)) | |
4058 | { | |
4059 | error_at (DECL_SOURCE_LOCATION (ivar_being_checked), | |
4060 | "duplicate instance variable %q+D", | |
4061 | ivar_being_checked); | |
4062 | inform (DECL_SOURCE_LOCATION (decl), | |
4063 | "previous declaration of %q+D", | |
4064 | decl); | |
4065 | /* FIXME: Do we need the following ? */ | |
4066 | /* DECL_NAME (ivar_being_checked) = NULL_TREE; */ | |
4067 | } | |
4068 | } | |
4069 | } | |
4070 | } | |
4071 | } | |
4072 | return true; | |
d764a8e6 | 4073 | } |
e31c7eec | 4074 | |
d764a8e6 IS |
4075 | /* Used by: build_private_template, continue_class, |
4076 | and for @defs constructs. */ | |
058bfe53 | 4077 | |
e31c7eec | 4078 | static tree |
d764a8e6 | 4079 | get_class_ivars (tree interface, bool inherited) |
e31c7eec | 4080 | { |
d764a8e6 IS |
4081 | tree ivar_chain = copy_list (CLASS_RAW_IVARS (interface)); |
4082 | ||
4083 | /* Both CLASS_RAW_IVARS and CLASS_IVARS contain a list of ivars declared | |
4084 | by the current class (i.e., they do not include super-class ivars). | |
4085 | However, the CLASS_IVARS list will be side-effected by a call to | |
4086 | finish_struct(), which will fill in field offsets. */ | |
4087 | if (!CLASS_IVARS (interface)) | |
4088 | CLASS_IVARS (interface) = ivar_chain; | |
4089 | ||
4090 | if (!inherited) | |
4091 | return ivar_chain; | |
4092 | ||
4093 | while (CLASS_SUPER_NAME (interface)) | |
058bfe53 | 4094 | { |
d764a8e6 IS |
4095 | /* Prepend super-class ivars. */ |
4096 | interface = lookup_interface (CLASS_SUPER_NAME (interface)); | |
4097 | ivar_chain = chainon (copy_list (CLASS_RAW_IVARS (interface)), | |
4098 | ivar_chain); | |
058bfe53 | 4099 | } |
e31c7eec | 4100 | |
d764a8e6 IS |
4101 | return ivar_chain; |
4102 | } | |
4103 | ||
4104 | void | |
4105 | objc_maybe_warn_exceptions (location_t loc) | |
4106 | { | |
4107 | /* -fobjc-exceptions is required to enable Objective-C exceptions. | |
4108 | For example, on Darwin, ObjC exceptions require a sufficiently | |
4109 | recent version of the runtime, so the user must ask for them | |
4110 | explicitly. On other platforms, at the moment -fobjc-exceptions | |
4111 | triggers -fexceptions which again is required for exceptions to | |
4112 | work. */ | |
4113 | if (!flag_objc_exceptions) | |
e31c7eec | 4114 | { |
d764a8e6 IS |
4115 | /* Warn only once per compilation unit. */ |
4116 | static bool warned = false; | |
e31c7eec | 4117 | |
d764a8e6 IS |
4118 | if (!warned) |
4119 | { | |
4120 | error_at (loc, "%<-fobjc-exceptions%> is required to enable Objective-C exception syntax"); | |
4121 | warned = true; | |
4122 | } | |
6c65299b | 4123 | } |
d764a8e6 IS |
4124 | } |
4125 | ||
4126 | static struct objc_try_context *cur_try_context; | |
e31c7eec | 4127 | |
d764a8e6 IS |
4128 | /* Called just after parsing the @try and its associated BODY. We now |
4129 | must prepare for the tricky bits -- handling the catches and finally. */ | |
e31c7eec | 4130 | |
d764a8e6 IS |
4131 | void |
4132 | objc_begin_try_stmt (location_t try_locus, tree body) | |
4133 | { | |
4134 | struct objc_try_context *c = XCNEW (struct objc_try_context); | |
4135 | c->outer = cur_try_context; | |
4136 | c->try_body = body; | |
4137 | c->try_locus = try_locus; | |
4138 | c->end_try_locus = input_location; | |
4139 | cur_try_context = c; | |
e31c7eec | 4140 | |
d764a8e6 IS |
4141 | /* Collect the list of local variables. We'll mark them as volatile |
4142 | at the end of compilation of this function to prevent them being | |
4143 | clobbered by setjmp/longjmp. */ | |
4144 | if (flag_objc_sjlj_exceptions) | |
4145 | objc_mark_locals_volatile (NULL); | |
e31c7eec TW |
4146 | } |
4147 | ||
d764a8e6 IS |
4148 | /* Called just after parsing "@catch (parm)". Open a binding level, |
4149 | enter DECL into the binding level, and initialize it. Leave the | |
4150 | binding level open while the body of the compound statement is | |
4151 | parsed. If DECL is NULL_TREE, then we are compiling "@catch(...)" | |
4152 | which we compile as "@catch(id tmp_variable)". */ | |
4153 | ||
e31c7eec | 4154 | void |
d764a8e6 | 4155 | objc_begin_catch_clause (tree decl) |
e31c7eec | 4156 | { |
d764a8e6 IS |
4157 | tree compound, type, t; |
4158 | bool ellipsis = false; | |
264fa2db | 4159 | |
d764a8e6 IS |
4160 | /* Begin a new scope that the entire catch clause will live in. */ |
4161 | compound = c_begin_compound_stmt (true); | |
264fa2db | 4162 | |
d764a8e6 IS |
4163 | /* Create the appropriate declaration for the argument. */ |
4164 | if (decl == error_mark_node) | |
4165 | type = error_mark_node; | |
4166 | else | |
4167 | { | |
4168 | if (decl == NULL_TREE) | |
4169 | { | |
4170 | /* If @catch(...) was specified, create a temporary variable of | |
4171 | type 'id' and use it. */ | |
4172 | decl = objc_create_temporary_var (objc_object_type, "__objc_generic_catch_var"); | |
4173 | DECL_SOURCE_LOCATION (decl) = input_location; | |
4174 | /* ... but allow the runtime to differentiate between ellipsis and the | |
4175 | case of @catch (id xyz). */ | |
4176 | ellipsis = true; | |
4177 | } | |
4178 | else | |
4179 | { | |
4180 | /* The parser passed in a PARM_DECL, but what we really want is a VAR_DECL. */ | |
4181 | decl = build_decl (input_location, | |
4182 | VAR_DECL, DECL_NAME (decl), TREE_TYPE (decl)); | |
4183 | } | |
4184 | lang_hooks.decls.pushdecl (decl); | |
e31c7eec | 4185 | |
d764a8e6 IS |
4186 | /* Mark the declaration as used so you never any warnings whether |
4187 | you use the exception argument or not. TODO: Implement a | |
4188 | -Wunused-exception-parameter flag, which would cause warnings | |
4189 | if exception parameter is not used. */ | |
4190 | TREE_USED (decl) = 1; | |
4191 | DECL_READ_P (decl) = 1; | |
e31c7eec | 4192 | |
d764a8e6 IS |
4193 | type = TREE_TYPE (decl); |
4194 | } | |
e31c7eec | 4195 | |
d764a8e6 IS |
4196 | /* Verify that the type of the catch is valid. It must be a pointer |
4197 | to an Objective-C class, or "id" (which is catch-all). */ | |
4198 | if (type == error_mark_node) | |
4199 | { | |
4200 | ;/* Just keep going. */ | |
4201 | } | |
4202 | else if (!objc_type_valid_for_messaging (type, false)) | |
4203 | { | |
4204 | error ("@catch parameter is not a known Objective-C class type"); | |
4205 | type = error_mark_node; | |
4206 | } | |
4207 | else if (TYPE_HAS_OBJC_INFO (TREE_TYPE (type)) | |
4208 | && TYPE_OBJC_PROTOCOL_LIST (TREE_TYPE (type))) | |
4209 | { | |
4210 | error ("@catch parameter can not be protocol-qualified"); | |
944fb799 | 4211 | type = error_mark_node; |
d764a8e6 IS |
4212 | } |
4213 | else if (POINTER_TYPE_P (type) && objc_is_object_id (TREE_TYPE (type))) | |
4214 | /* @catch (id xyz) or @catch (...) but we note this for runtimes that | |
4215 | identify 'id'. */ | |
4216 | ; | |
4217 | else | |
4218 | { | |
4219 | /* If 'type' was built using typedefs, we need to get rid of | |
4220 | them and get a simple pointer to the class. */ | |
4221 | bool is_typedef = false; | |
4222 | tree x = TYPE_MAIN_VARIANT (type); | |
944fb799 | 4223 | |
d764a8e6 IS |
4224 | /* Skip from the pointer to the pointee. */ |
4225 | if (TREE_CODE (x) == POINTER_TYPE) | |
4226 | x = TREE_TYPE (x); | |
944fb799 | 4227 | |
d764a8e6 IS |
4228 | /* Traverse typedef aliases */ |
4229 | while (TREE_CODE (x) == RECORD_TYPE && OBJC_TYPE_NAME (x) | |
4230 | && TREE_CODE (OBJC_TYPE_NAME (x)) == TYPE_DECL | |
4231 | && DECL_ORIGINAL_TYPE (OBJC_TYPE_NAME (x))) | |
e31c7eec | 4232 | { |
d764a8e6 IS |
4233 | is_typedef = true; |
4234 | x = DECL_ORIGINAL_TYPE (OBJC_TYPE_NAME (x)); | |
4235 | } | |
035e8f01 | 4236 | |
d764a8e6 IS |
4237 | /* If it was a typedef, build a pointer to the final, original |
4238 | class. */ | |
4239 | if (is_typedef) | |
4240 | type = build_pointer_type (x); | |
035e8f01 | 4241 | |
d764a8e6 IS |
4242 | if (cur_try_context->catch_list) |
4243 | { | |
4244 | /* Examine previous @catch clauses and see if we've already | |
4245 | caught the type in question. */ | |
4246 | tree_stmt_iterator i = tsi_start (cur_try_context->catch_list); | |
4247 | for (; !tsi_end_p (i); tsi_next (&i)) | |
4248 | { | |
4249 | tree stmt = tsi_stmt (i); | |
4250 | t = CATCH_TYPES (stmt); | |
4251 | if (t == error_mark_node) | |
4252 | continue; | |
4253 | if (!t || DERIVED_FROM_P (TREE_TYPE (t), TREE_TYPE (type))) | |
035e8f01 | 4254 | { |
d764a8e6 IS |
4255 | warning (0, "exception of type %<%T%> will be caught", |
4256 | TREE_TYPE (type)); | |
4257 | warning_at (EXPR_LOCATION (stmt), 0, " by earlier handler for %<%T%>", | |
4258 | TREE_TYPE (t ? t : objc_object_type)); | |
4259 | break; | |
035e8f01 | 4260 | } |
264fa2db | 4261 | } |
e31c7eec TW |
4262 | } |
4263 | } | |
6c65299b | 4264 | |
d764a8e6 IS |
4265 | t = (*runtime.begin_catch) (&cur_try_context, type, decl, compound, ellipsis); |
4266 | add_stmt (t); | |
4267 | } | |
6c65299b | 4268 | |
d764a8e6 IS |
4269 | /* Called just after parsing the closing brace of a @catch clause. Close |
4270 | the open binding level, and record a CATCH_EXPR for it. */ | |
264fa2db | 4271 | |
d764a8e6 IS |
4272 | void |
4273 | objc_finish_catch_clause (void) | |
4274 | { | |
4275 | tree c = cur_try_context->current_catch; | |
4276 | cur_try_context->current_catch = NULL; | |
4277 | cur_try_context->end_catch_locus = input_location; | |
264fa2db | 4278 | |
d764a8e6 | 4279 | CATCH_BODY (c) = c_end_compound_stmt (input_location, CATCH_BODY (c), 1); |
6c65299b | 4280 | |
d764a8e6 IS |
4281 | (*runtime.finish_catch) (&cur_try_context, c); |
4282 | } | |
6c65299b | 4283 | |
d764a8e6 IS |
4284 | /* Called after parsing a @finally clause and its associated BODY. |
4285 | Record the body for later placement. */ | |
6c65299b | 4286 | |
d764a8e6 IS |
4287 | void |
4288 | objc_build_finally_clause (location_t finally_locus, tree body) | |
4289 | { | |
4290 | cur_try_context->finally_body = body; | |
4291 | cur_try_context->finally_locus = finally_locus; | |
4292 | cur_try_context->end_finally_locus = input_location; | |
370ce32a ZL |
4293 | } |
4294 | ||
d764a8e6 | 4295 | /* Called to finalize a @try construct. */ |
6408ef33 ZL |
4296 | |
4297 | tree | |
d764a8e6 | 4298 | objc_finish_try_stmt (void) |
6408ef33 | 4299 | { |
d764a8e6 IS |
4300 | struct objc_try_context *c = cur_try_context; |
4301 | tree stmt; | |
6408ef33 | 4302 | |
d764a8e6 IS |
4303 | if (c->catch_list == NULL && c->finally_body == NULL) |
4304 | error ("%<@try%> without %<@catch%> or %<@finally%>"); | |
6408ef33 | 4305 | |
d764a8e6 IS |
4306 | stmt = (*runtime.finish_try_stmt) (&cur_try_context); |
4307 | add_stmt (stmt); | |
6408ef33 | 4308 | |
d764a8e6 IS |
4309 | cur_try_context = c->outer; |
4310 | free (c); | |
4311 | return stmt; | |
4312 | } | |
264fa2db | 4313 | |
370ce32a | 4314 | tree |
d764a8e6 | 4315 | objc_build_throw_stmt (location_t loc, tree throw_expr) |
370ce32a | 4316 | { |
d764a8e6 | 4317 | bool rethrown = false; |
6408ef33 | 4318 | |
d764a8e6 | 4319 | objc_maybe_warn_exceptions (loc); |
6408ef33 | 4320 | |
d764a8e6 IS |
4321 | /* Don't waste time trying to build something if we're already dead. */ |
4322 | if (throw_expr == error_mark_node) | |
4323 | return error_mark_node; | |
6408ef33 | 4324 | |
d764a8e6 IS |
4325 | if (throw_expr == NULL) |
4326 | { | |
4327 | /* If we're not inside a @catch block, there is no "current | |
4328 | exception" to be rethrown. */ | |
4329 | if (cur_try_context == NULL | |
4330 | || cur_try_context->current_catch == NULL) | |
4331 | { | |
4332 | error_at (loc, "%<@throw%> (rethrow) used outside of a @catch block"); | |
4333 | return error_mark_node; | |
4334 | } | |
4335 | ||
4336 | /* Otherwise the object is still sitting in the EXC_PTR_EXPR | |
4337 | value that we get from the runtime. */ | |
4338 | throw_expr = (*runtime.build_exc_ptr) (&cur_try_context); | |
4339 | rethrown = true; | |
4340 | } | |
4341 | else | |
4342 | { | |
4343 | if (!objc_type_valid_for_messaging (TREE_TYPE (throw_expr), true)) | |
4344 | { | |
4345 | error_at (loc, "%<@throw%> argument is not an object"); | |
4346 | return error_mark_node; | |
4347 | } | |
4348 | } | |
4349 | ||
4350 | return (*runtime.build_throw_stmt) (loc, throw_expr, rethrown); | |
6c65299b RS |
4351 | } |
4352 | ||
d764a8e6 IS |
4353 | tree |
4354 | objc_build_synchronized (location_t start_locus, tree object_expr, tree body) | |
38b9c8c3 | 4355 | { |
d764a8e6 IS |
4356 | /* object_expr should never be NULL; but in case it is, convert it to |
4357 | error_mark_node. */ | |
4358 | if (object_expr == NULL) | |
4359 | object_expr = error_mark_node; | |
38b9c8c3 | 4360 | |
d764a8e6 IS |
4361 | /* Validate object_expr. If not valid, set it to error_mark_node. */ |
4362 | if (object_expr != error_mark_node) | |
38b9c8c3 | 4363 | { |
d764a8e6 IS |
4364 | if (!objc_type_valid_for_messaging (TREE_TYPE (object_expr), true)) |
4365 | { | |
4366 | error_at (start_locus, "%<@synchronized%> argument is not an object"); | |
4367 | object_expr = error_mark_node; | |
4368 | } | |
38b9c8c3 | 4369 | } |
944fb799 | 4370 | |
d764a8e6 IS |
4371 | if (object_expr == error_mark_node) |
4372 | { | |
4373 | /* If we found an error, we simply ignore the '@synchronized'. | |
4374 | Compile the body so we can keep going with minimal | |
4375 | casualties. */ | |
4376 | return add_stmt (body); | |
4377 | } | |
4378 | else | |
4379 | { | |
4380 | tree call; | |
4381 | tree args; | |
38b9c8c3 | 4382 | |
944fb799 | 4383 | /* objc_sync_enter (object_expr); */ |
d764a8e6 IS |
4384 | object_expr = save_expr (object_expr); |
4385 | args = tree_cons (NULL, object_expr, NULL); | |
4386 | call = build_function_call (input_location, | |
4387 | objc_sync_enter_decl, args); | |
4388 | SET_EXPR_LOCATION (call, start_locus); | |
4389 | add_stmt (call); | |
38b9c8c3 | 4390 | |
d764a8e6 IS |
4391 | /* Build "objc_sync_exit (object_expr);" but do not add it yet; |
4392 | it goes inside the @finalize() clause. */ | |
4393 | args = tree_cons (NULL, object_expr, NULL); | |
4394 | call = build_function_call (input_location, | |
4395 | objc_sync_exit_decl, args); | |
4396 | SET_EXPR_LOCATION (call, input_location); | |
38b9c8c3 | 4397 | |
d764a8e6 IS |
4398 | /* @try { body; } */ |
4399 | objc_begin_try_stmt (start_locus, body); | |
944fb799 | 4400 | |
d764a8e6 IS |
4401 | /* @finally { objc_sync_exit (object_expr); } */ |
4402 | objc_build_finally_clause (input_location, call); | |
944fb799 | 4403 | |
d764a8e6 IS |
4404 | /* End of try statement. */ |
4405 | return objc_finish_try_stmt (); | |
4406 | } | |
38b9c8c3 ZL |
4407 | } |
4408 | ||
d764a8e6 IS |
4409 | /* Construct a C struct corresponding to ObjC class CLASS, with the same |
4410 | name as the class: | |
38b9c8c3 | 4411 | |
d764a8e6 IS |
4412 | struct <classname> { |
4413 | struct _objc_class *isa; | |
4414 | ... | |
4415 | }; */ | |
38b9c8c3 | 4416 | |
d764a8e6 IS |
4417 | static void |
4418 | build_private_template (tree klass) | |
38b9c8c3 | 4419 | { |
d764a8e6 IS |
4420 | if (!CLASS_STATIC_TEMPLATE (klass)) |
4421 | { | |
4422 | tree record = objc_build_struct (klass, | |
4423 | get_class_ivars (klass, false), | |
4424 | CLASS_SUPER_NAME (klass)); | |
38b9c8c3 | 4425 | |
d764a8e6 IS |
4426 | /* Set the TREE_USED bit for this struct, so that stab generator |
4427 | can emit stabs for this struct type. */ | |
4428 | if (flag_debug_only_used_symbols && TYPE_STUB_DECL (record)) | |
4429 | TREE_USED (TYPE_STUB_DECL (record)) = 1; | |
38b9c8c3 | 4430 | |
d764a8e6 IS |
4431 | /* Copy the attributes from the class to the type. */ |
4432 | if (TREE_DEPRECATED (klass)) | |
4433 | TREE_DEPRECATED (record) = 1; | |
d764a8e6 | 4434 | } |
38b9c8c3 ZL |
4435 | } |
4436 | ||
d764a8e6 IS |
4437 | /* Begin code generation for protocols... */ |
4438 | ||
4439 | static tree | |
4440 | objc_method_parm_type (tree type) | |
38b9c8c3 | 4441 | { |
d764a8e6 IS |
4442 | type = TREE_VALUE (TREE_TYPE (type)); |
4443 | if (TREE_CODE (type) == TYPE_DECL) | |
4444 | type = TREE_TYPE (type); | |
4445 | return type; | |
38b9c8c3 ZL |
4446 | } |
4447 | ||
4448 | static int | |
d764a8e6 | 4449 | objc_encoded_type_size (tree type) |
38b9c8c3 | 4450 | { |
d764a8e6 IS |
4451 | int sz = int_size_in_bytes (type); |
4452 | ||
4453 | /* Make all integer and enum types at least as large | |
4454 | as an int. */ | |
4455 | if (sz > 0 && INTEGRAL_TYPE_P (type)) | |
4456 | sz = MAX (sz, int_size_in_bytes (integer_type_node)); | |
4457 | /* Treat arrays as pointers, since that's how they're | |
4458 | passed in. */ | |
4459 | else if (TREE_CODE (type) == ARRAY_TYPE) | |
4460 | sz = int_size_in_bytes (ptr_type_node); | |
4461 | return sz; | |
38b9c8c3 | 4462 | } |
6c65299b | 4463 | |
d764a8e6 IS |
4464 | /* Encode a method prototype. |
4465 | ||
4466 | The format is described in gcc/doc/objc.texi, section 'Method | |
4467 | signatures'. | |
4468 | */ | |
4469 | ||
38b9c8c3 | 4470 | tree |
d764a8e6 | 4471 | encode_method_prototype (tree method_decl) |
38b9c8c3 | 4472 | { |
d764a8e6 IS |
4473 | tree parms; |
4474 | int parm_offset, i; | |
4475 | char buf[40]; | |
4476 | tree result; | |
38b9c8c3 | 4477 | |
d764a8e6 IS |
4478 | /* ONEWAY and BYCOPY, for remote object are the only method qualifiers. */ |
4479 | encode_type_qualifiers (TREE_PURPOSE (TREE_TYPE (method_decl))); | |
d925c9eb | 4480 | |
d764a8e6 IS |
4481 | /* Encode return type. */ |
4482 | encode_type (objc_method_parm_type (method_decl), | |
4483 | obstack_object_size (&util_obstack), | |
4484 | OBJC_ENCODE_INLINE_DEFS); | |
4485 | ||
4486 | /* Stack size. */ | |
4487 | /* The first two arguments (self and _cmd) are pointers; account for | |
4488 | their size. */ | |
4489 | i = int_size_in_bytes (ptr_type_node); | |
4490 | parm_offset = 2 * i; | |
4491 | for (parms = METHOD_SEL_ARGS (method_decl); parms; | |
4492 | parms = DECL_CHAIN (parms)) | |
38b9c8c3 | 4493 | { |
d764a8e6 IS |
4494 | tree type = objc_method_parm_type (parms); |
4495 | int sz = objc_encoded_type_size (type); | |
38b9c8c3 | 4496 | |
d764a8e6 IS |
4497 | /* If a type size is not known, bail out. */ |
4498 | if (sz < 0) | |
38b9c8c3 | 4499 | { |
d764a8e6 IS |
4500 | error_at (DECL_SOURCE_LOCATION (method_decl), |
4501 | "type %qT does not have a known size", | |
4502 | type); | |
4503 | /* Pretend that the encoding succeeded; the compilation will | |
4504 | fail nevertheless. */ | |
4505 | goto finish_encoding; | |
4506 | } | |
4507 | parm_offset += sz; | |
4508 | } | |
38b9c8c3 | 4509 | |
d764a8e6 IS |
4510 | sprintf (buf, "%d@0:%d", parm_offset, i); |
4511 | obstack_grow (&util_obstack, buf, strlen (buf)); | |
38b9c8c3 | 4512 | |
d764a8e6 IS |
4513 | /* Argument types. */ |
4514 | parm_offset = 2 * i; | |
4515 | for (parms = METHOD_SEL_ARGS (method_decl); parms; | |
4516 | parms = DECL_CHAIN (parms)) | |
38b9c8c3 | 4517 | { |
d764a8e6 | 4518 | tree type = objc_method_parm_type (parms); |
38b9c8c3 | 4519 | |
d764a8e6 IS |
4520 | /* Process argument qualifiers for user supplied arguments. */ |
4521 | encode_type_qualifiers (TREE_PURPOSE (TREE_TYPE (parms))); | |
38b9c8c3 | 4522 | |
d764a8e6 IS |
4523 | /* Type. */ |
4524 | encode_type (type, obstack_object_size (&util_obstack), | |
4525 | OBJC_ENCODE_INLINE_DEFS); | |
38b9c8c3 | 4526 | |
d764a8e6 IS |
4527 | /* Compute offset. */ |
4528 | sprintf (buf, "%d", parm_offset); | |
4529 | parm_offset += objc_encoded_type_size (type); | |
4530 | ||
4531 | obstack_grow (&util_obstack, buf, strlen (buf)); | |
38b9c8c3 ZL |
4532 | } |
4533 | ||
d764a8e6 IS |
4534 | finish_encoding: |
4535 | obstack_1grow (&util_obstack, '\0'); | |
4536 | result = get_identifier (XOBFINISH (&util_obstack, char *)); | |
4537 | obstack_free (&util_obstack, util_firstobj); | |
4538 | return result; | |
4539 | } | |
38b9c8c3 | 4540 | |
d764a8e6 IS |
4541 | /* Generate either '- .cxx_construct' or '- .cxx_destruct' for the |
4542 | current class. */ | |
4543 | #ifdef OBJCPLUS | |
4544 | static void | |
4545 | objc_generate_cxx_ctor_or_dtor (bool dtor) | |
4546 | { | |
4547 | tree fn, body, compound_stmt, ivar; | |
38b9c8c3 | 4548 | |
d764a8e6 IS |
4549 | /* - (id) .cxx_construct { ... return self; } */ |
4550 | /* - (void) .cxx_construct { ... } */ | |
38b9c8c3 | 4551 | |
d764a8e6 IS |
4552 | objc_start_method_definition |
4553 | (false /* is_class_method */, | |
4554 | objc_build_method_signature (false /* is_class_method */, | |
4555 | build_tree_list (NULL_TREE, | |
4556 | dtor | |
4557 | ? void_type_node | |
4558 | : objc_object_type), | |
4559 | get_identifier (dtor | |
4560 | ? TAG_CXX_DESTRUCT | |
4561 | : TAG_CXX_CONSTRUCT), | |
4562 | make_node (TREE_LIST), | |
a04a722b | 4563 | false), NULL, NULL_TREE); |
d764a8e6 IS |
4564 | body = begin_function_body (); |
4565 | compound_stmt = begin_compound_stmt (0); | |
38b9c8c3 | 4566 | |
d764a8e6 IS |
4567 | ivar = CLASS_IVARS (implementation_template); |
4568 | /* Destroy ivars in reverse order. */ | |
4569 | if (dtor) | |
4570 | ivar = nreverse (copy_list (ivar)); | |
64ee9490 | 4571 | |
d764a8e6 | 4572 | for (; ivar; ivar = TREE_CHAIN (ivar)) |
38b9c8c3 | 4573 | { |
d764a8e6 | 4574 | if (TREE_CODE (ivar) == FIELD_DECL) |
38b9c8c3 | 4575 | { |
d764a8e6 | 4576 | tree type = TREE_TYPE (ivar); |
38b9c8c3 | 4577 | |
d764a8e6 IS |
4578 | /* Call the ivar's default constructor or destructor. Do not |
4579 | call the destructor unless a corresponding constructor call | |
4580 | has also been made (or is not needed). */ | |
4581 | if (MAYBE_CLASS_TYPE_P (type) | |
4582 | && (dtor | |
4583 | ? (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type) | |
4584 | && (!TYPE_NEEDS_CONSTRUCTING (type) | |
4585 | || TYPE_HAS_DEFAULT_CONSTRUCTOR (type))) | |
4586 | : (TYPE_NEEDS_CONSTRUCTING (type) | |
4587 | && TYPE_HAS_DEFAULT_CONSTRUCTOR (type)))) | |
4588 | finish_expr_stmt | |
4589 | (build_special_member_call | |
4590 | (build_ivar_reference (DECL_NAME (ivar)), | |
4591 | dtor ? complete_dtor_identifier : complete_ctor_identifier, | |
4592 | NULL, type, LOOKUP_NORMAL, tf_warning_or_error)); | |
38b9c8c3 | 4593 | } |
d764a8e6 | 4594 | } |
38b9c8c3 | 4595 | |
d764a8e6 IS |
4596 | /* The constructor returns 'self'. */ |
4597 | if (!dtor) | |
4598 | finish_return_stmt (self_decl); | |
38b9c8c3 | 4599 | |
d764a8e6 IS |
4600 | finish_compound_stmt (compound_stmt); |
4601 | finish_function_body (body); | |
4602 | fn = current_function_decl; | |
4603 | finish_function (); | |
4604 | objc_finish_method_definition (fn); | |
4605 | } | |
38b9c8c3 | 4606 | |
d764a8e6 IS |
4607 | /* The following routine will examine the current @interface for any |
4608 | non-POD C++ ivars requiring non-trivial construction and/or | |
4609 | destruction, and then synthesize special '- .cxx_construct' and/or | |
4610 | '- .cxx_destruct' methods which will run the appropriate | |
4611 | construction or destruction code. Note that ivars inherited from | |
4612 | super-classes are _not_ considered. */ | |
4613 | static void | |
4614 | objc_generate_cxx_cdtors (void) | |
4615 | { | |
4616 | bool need_ctor = false, need_dtor = false; | |
4617 | tree ivar; | |
38b9c8c3 | 4618 | |
d764a8e6 IS |
4619 | /* Error case, due to possibly an extra @end. */ |
4620 | if (!objc_implementation_context) | |
4621 | return; | |
38b9c8c3 | 4622 | |
d764a8e6 IS |
4623 | /* We do not want to do this for categories, since they do not have |
4624 | their own ivars. */ | |
38b9c8c3 | 4625 | |
d764a8e6 IS |
4626 | if (TREE_CODE (objc_implementation_context) != CLASS_IMPLEMENTATION_TYPE) |
4627 | return; | |
38b9c8c3 | 4628 | |
d764a8e6 | 4629 | /* First, determine if we even need a constructor and/or destructor. */ |
38b9c8c3 | 4630 | |
d764a8e6 IS |
4631 | for (ivar = CLASS_IVARS (implementation_template); ivar; |
4632 | ivar = TREE_CHAIN (ivar)) | |
4633 | { | |
4634 | if (TREE_CODE (ivar) == FIELD_DECL) | |
4635 | { | |
4636 | tree type = TREE_TYPE (ivar); | |
38b9c8c3 | 4637 | |
d764a8e6 IS |
4638 | if (MAYBE_CLASS_TYPE_P (type)) |
4639 | { | |
4640 | if (TYPE_NEEDS_CONSTRUCTING (type) | |
4641 | && TYPE_HAS_DEFAULT_CONSTRUCTOR (type)) | |
4642 | /* NB: If a default constructor is not available, we will not | |
4643 | be able to initialize this ivar; the add_instance_variable() | |
4644 | routine will already have warned about this. */ | |
4645 | need_ctor = true; | |
4646 | ||
4647 | if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type) | |
4648 | && (!TYPE_NEEDS_CONSTRUCTING (type) | |
4649 | || TYPE_HAS_DEFAULT_CONSTRUCTOR (type))) | |
4650 | /* NB: If a default constructor is not available, we will not | |
4651 | call the destructor either, for symmetry. */ | |
4652 | need_dtor = true; | |
4653 | } | |
4654 | } | |
38b9c8c3 ZL |
4655 | } |
4656 | ||
d764a8e6 | 4657 | /* Generate '- .cxx_construct' if needed. */ |
38b9c8c3 | 4658 | |
d764a8e6 IS |
4659 | if (need_ctor) |
4660 | objc_generate_cxx_ctor_or_dtor (false); | |
38b9c8c3 | 4661 | |
d764a8e6 | 4662 | /* Generate '- .cxx_destruct' if needed. */ |
55cb0169 | 4663 | |
d764a8e6 IS |
4664 | if (need_dtor) |
4665 | objc_generate_cxx_ctor_or_dtor (true); | |
4666 | ||
4667 | /* The 'imp_list' variable points at an imp_entry record for the current | |
4668 | @implementation. Record the existence of '- .cxx_construct' and/or | |
4669 | '- .cxx_destruct' methods therein; it will be included in the | |
4670 | metadata for the class if the runtime needs it. */ | |
4671 | imp_list->has_cxx_cdtors = (need_ctor || need_dtor); | |
38b9c8c3 | 4672 | } |
d764a8e6 | 4673 | #endif |
38b9c8c3 | 4674 | |
d764a8e6 IS |
4675 | static void |
4676 | error_with_ivar (const char *message, tree decl) | |
38b9c8c3 | 4677 | { |
d764a8e6 IS |
4678 | error_at (DECL_SOURCE_LOCATION (decl), "%s %qs", |
4679 | message, identifier_to_locale (gen_declaration (decl))); | |
4680 | ||
38b9c8c3 ZL |
4681 | } |
4682 | ||
d764a8e6 IS |
4683 | static void |
4684 | check_ivars (tree inter, tree imp) | |
38b9c8c3 | 4685 | { |
d764a8e6 IS |
4686 | tree intdecls = CLASS_RAW_IVARS (inter); |
4687 | tree impdecls = CLASS_RAW_IVARS (imp); | |
4688 | ||
4689 | while (1) | |
4690 | { | |
4691 | tree t1, t2; | |
4692 | ||
264fa2db | 4693 | #ifdef OBJCPLUS |
d764a8e6 IS |
4694 | if (intdecls && TREE_CODE (intdecls) == TYPE_DECL) |
4695 | intdecls = TREE_CHAIN (intdecls); | |
264fa2db | 4696 | #endif |
d764a8e6 IS |
4697 | if (intdecls == 0 && impdecls == 0) |
4698 | break; | |
4699 | if (intdecls == 0 || impdecls == 0) | |
4700 | { | |
4701 | error ("inconsistent instance variable specification"); | |
4702 | break; | |
4703 | } | |
38b9c8c3 | 4704 | |
d764a8e6 | 4705 | t1 = TREE_TYPE (intdecls); t2 = TREE_TYPE (impdecls); |
38b9c8c3 | 4706 | |
d764a8e6 IS |
4707 | if (!comptypes (t1, t2) |
4708 | || !tree_int_cst_equal (DECL_INITIAL (intdecls), | |
4709 | DECL_INITIAL (impdecls))) | |
4710 | { | |
4711 | if (DECL_NAME (intdecls) == DECL_NAME (impdecls)) | |
4712 | { | |
4713 | error_with_ivar ("conflicting instance variable type", | |
4714 | impdecls); | |
4715 | error_with_ivar ("previous declaration of", | |
4716 | intdecls); | |
4717 | } | |
4718 | else /* both the type and the name don't match */ | |
4719 | { | |
4720 | error ("inconsistent instance variable specification"); | |
4721 | break; | |
4722 | } | |
4723 | } | |
264fa2db | 4724 | |
d764a8e6 IS |
4725 | else if (DECL_NAME (intdecls) != DECL_NAME (impdecls)) |
4726 | { | |
4727 | error_with_ivar ("conflicting instance variable name", | |
4728 | impdecls); | |
4729 | error_with_ivar ("previous declaration of", | |
4730 | intdecls); | |
4731 | } | |
264fa2db | 4732 | |
d764a8e6 IS |
4733 | intdecls = DECL_CHAIN (intdecls); |
4734 | impdecls = DECL_CHAIN (impdecls); | |
4735 | } | |
264fa2db ZL |
4736 | } |
4737 | ||
d764a8e6 IS |
4738 | |
4739 | static void | |
4740 | mark_referenced_methods (void) | |
c0c24aa4 | 4741 | { |
d764a8e6 IS |
4742 | struct imp_entry *impent; |
4743 | tree chain; | |
c0c24aa4 | 4744 | |
d764a8e6 IS |
4745 | for (impent = imp_list; impent; impent = impent->next) |
4746 | { | |
4747 | chain = CLASS_CLS_METHODS (impent->imp_context); | |
4748 | while (chain) | |
4749 | { | |
a358e188 MJ |
4750 | cgraph_mark_needed_node ( |
4751 | cgraph_get_create_node (METHOD_DEFINITION (chain))); | |
d764a8e6 IS |
4752 | chain = DECL_CHAIN (chain); |
4753 | } | |
c0c24aa4 | 4754 | |
d764a8e6 IS |
4755 | chain = CLASS_NST_METHODS (impent->imp_context); |
4756 | while (chain) | |
4757 | { | |
a358e188 MJ |
4758 | cgraph_mark_needed_node ( |
4759 | cgraph_get_create_node (METHOD_DEFINITION (chain))); | |
d764a8e6 IS |
4760 | chain = DECL_CHAIN (chain); |
4761 | } | |
4762 | } | |
4763 | } | |
e31c7eec | 4764 | |
d764a8e6 IS |
4765 | /* If type is empty or only type qualifiers are present, add default |
4766 | type of id (otherwise grokdeclarator will default to int). */ | |
4767 | static inline tree | |
4768 | adjust_type_for_id_default (tree type) | |
e31c7eec | 4769 | { |
d764a8e6 IS |
4770 | if (!type) |
4771 | type = make_node (TREE_LIST); | |
d11dd684 | 4772 | |
d764a8e6 IS |
4773 | if (!TREE_VALUE (type)) |
4774 | TREE_VALUE (type) = objc_object_type; | |
4775 | else if (TREE_CODE (TREE_VALUE (type)) == RECORD_TYPE | |
4776 | && TYPED_OBJECT (TREE_VALUE (type))) | |
4777 | error ("can not use an object as parameter to a method"); | |
264fa2db | 4778 | |
d764a8e6 | 4779 | return type; |
264fa2db ZL |
4780 | } |
4781 | ||
d764a8e6 IS |
4782 | /* Return a KEYWORD_DECL built using the specified key_name, arg_type, |
4783 | arg_name and attributes. (TODO: Rename KEYWORD_DECL to | |
4784 | OBJC_METHOD_PARM_DECL ?) | |
264fa2db | 4785 | |
d764a8e6 IS |
4786 | A KEYWORD_DECL is a tree representing the declaration of a |
4787 | parameter of an Objective-C method. It is produced when parsing a | |
4788 | fragment of Objective-C method declaration of the form | |
264fa2db | 4789 | |
d764a8e6 IS |
4790 | keyworddecl: |
4791 | selector ':' '(' typename ')' identifier | |
264fa2db | 4792 | |
d764a8e6 | 4793 | For example, take the Objective-C method |
264fa2db | 4794 | |
944fb799 | 4795 | -(NSString *)pathForResource:(NSString *)resource ofType:(NSString *)type; |
264fa2db | 4796 | |
d764a8e6 IS |
4797 | the two fragments "pathForResource:(NSString *)resource" and |
4798 | "ofType:(NSString *)type" will generate a KEYWORD_DECL each. The | |
4799 | KEYWORD_DECL stores the 'key_name' (eg, identifier for | |
4800 | "pathForResource"), the 'arg_type' (eg, tree representing a | |
4801 | NSString *), the 'arg_name' (eg identifier for "resource") and | |
4802 | potentially some attributes (for example, a tree representing | |
4803 | __attribute__ ((unused)) if such an attribute was attached to a | |
4804 | certain parameter). You can access this information using the | |
4805 | TREE_TYPE (for arg_type), KEYWORD_ARG_NAME (for arg_name), | |
4806 | KEYWORD_KEY_NAME (for key_name), DECL_ATTRIBUTES (for attributes). | |
264fa2db | 4807 | |
d764a8e6 IS |
4808 | 'key_name' is an identifier node (and is optional as you can omit |
4809 | it in Objective-C methods). | |
4810 | 'arg_type' is a tree list (and is optional too if no parameter type | |
4811 | was specified). | |
4812 | 'arg_name' is an identifier node and is required. | |
4813 | 'attributes' is an optional tree containing parameter attributes. */ | |
4814 | tree | |
944fb799 | 4815 | objc_build_keyword_decl (tree key_name, tree arg_type, |
d764a8e6 IS |
4816 | tree arg_name, tree attributes) |
4817 | { | |
4818 | tree keyword_decl; | |
264fa2db | 4819 | |
d764a8e6 IS |
4820 | if (flag_objc1_only && attributes) |
4821 | error_at (input_location, "method argument attributes are not available in Objective-C 1.0"); | |
264fa2db | 4822 | |
d764a8e6 IS |
4823 | /* If no type is specified, default to "id". */ |
4824 | arg_type = adjust_type_for_id_default (arg_type); | |
325c3691 | 4825 | |
d764a8e6 | 4826 | keyword_decl = make_node (KEYWORD_DECL); |
f9417da1 | 4827 | |
d764a8e6 IS |
4828 | TREE_TYPE (keyword_decl) = arg_type; |
4829 | KEYWORD_ARG_NAME (keyword_decl) = arg_name; | |
4830 | KEYWORD_KEY_NAME (keyword_decl) = key_name; | |
4831 | DECL_ATTRIBUTES (keyword_decl) = attributes; | |
264fa2db | 4832 | |
d764a8e6 | 4833 | return keyword_decl; |
264fa2db | 4834 | } |
093c7153 | 4835 | |
d764a8e6 IS |
4836 | /* Given a chain of keyword_decl's, synthesize the full keyword selector. */ |
4837 | static tree | |
4838 | build_keyword_selector (tree selector) | |
264fa2db | 4839 | { |
d764a8e6 IS |
4840 | int len = 0; |
4841 | tree key_chain, key_name; | |
4842 | char *buf; | |
264fa2db | 4843 | |
d764a8e6 IS |
4844 | /* Scan the selector to see how much space we'll need. */ |
4845 | for (key_chain = selector; key_chain; key_chain = TREE_CHAIN (key_chain)) | |
5287cfd5 | 4846 | { |
d764a8e6 | 4847 | switch (TREE_CODE (selector)) |
46270f14 | 4848 | { |
d764a8e6 IS |
4849 | case KEYWORD_DECL: |
4850 | key_name = KEYWORD_KEY_NAME (key_chain); | |
4851 | break; | |
4852 | case TREE_LIST: | |
4853 | key_name = TREE_PURPOSE (key_chain); | |
4854 | break; | |
4855 | default: | |
4856 | gcc_unreachable (); | |
46270f14 | 4857 | } |
d764a8e6 IS |
4858 | |
4859 | if (key_name) | |
4860 | len += IDENTIFIER_LENGTH (key_name) + 1; | |
4861 | else | |
4862 | /* Just a ':' arg. */ | |
4863 | len++; | |
46270f14 | 4864 | } |
5287cfd5 | 4865 | |
d764a8e6 IS |
4866 | buf = (char *) alloca (len + 1); |
4867 | /* Start the buffer out as an empty string. */ | |
4868 | buf[0] = '\0'; | |
093c7153 | 4869 | |
d764a8e6 | 4870 | for (key_chain = selector; key_chain; key_chain = TREE_CHAIN (key_chain)) |
093c7153 | 4871 | { |
d764a8e6 | 4872 | switch (TREE_CODE (selector)) |
093c7153 | 4873 | { |
d764a8e6 IS |
4874 | case KEYWORD_DECL: |
4875 | key_name = KEYWORD_KEY_NAME (key_chain); | |
4876 | break; | |
4877 | case TREE_LIST: | |
4878 | key_name = TREE_PURPOSE (key_chain); | |
4879 | /* The keyword decl chain will later be used as a function | |
4880 | argument chain. Unhook the selector itself so as to not | |
4881 | confuse other parts of the compiler. */ | |
4882 | TREE_PURPOSE (key_chain) = NULL_TREE; | |
4883 | break; | |
4884 | default: | |
4885 | gcc_unreachable (); | |
093c7153 | 4886 | } |
264fa2db | 4887 | |
d764a8e6 IS |
4888 | if (key_name) |
4889 | strcat (buf, IDENTIFIER_POINTER (key_name)); | |
4890 | strcat (buf, ":"); | |
4891 | } | |
264fa2db | 4892 | |
1328049a | 4893 | return get_identifier_with_length (buf, len); |
264fa2db ZL |
4894 | } |
4895 | ||
d764a8e6 | 4896 | /* Used for declarations and definitions. */ |
093c7153 RH |
4897 | |
4898 | static tree | |
d764a8e6 IS |
4899 | build_method_decl (enum tree_code code, tree ret_type, tree selector, |
4900 | tree add_args, bool ellipsis) | |
264fa2db | 4901 | { |
d764a8e6 | 4902 | tree method_decl; |
264fa2db | 4903 | |
d764a8e6 IS |
4904 | /* If no type is specified, default to "id". */ |
4905 | ret_type = adjust_type_for_id_default (ret_type); | |
264fa2db | 4906 | |
d764a8e6 IS |
4907 | /* Note how a method_decl has a TREE_TYPE which is not the function |
4908 | type of the function implementing the method, but only the return | |
4909 | type of the method. We may want to change this, and store the | |
4910 | entire function type in there (eg, it may be used to simplify | |
4911 | dealing with attributes below). */ | |
4912 | method_decl = make_node (code); | |
4913 | TREE_TYPE (method_decl) = ret_type; | |
264fa2db | 4914 | |
d764a8e6 IS |
4915 | /* If we have a keyword selector, create an identifier_node that |
4916 | represents the full selector name (`:' included)... */ | |
4917 | if (TREE_CODE (selector) == KEYWORD_DECL) | |
4918 | { | |
4919 | METHOD_SEL_NAME (method_decl) = build_keyword_selector (selector); | |
4920 | METHOD_SEL_ARGS (method_decl) = selector; | |
4921 | METHOD_ADD_ARGS (method_decl) = add_args; | |
4922 | METHOD_ADD_ARGS_ELLIPSIS_P (method_decl) = ellipsis; | |
4923 | } | |
4924 | else | |
4925 | { | |
4926 | METHOD_SEL_NAME (method_decl) = selector; | |
4927 | METHOD_SEL_ARGS (method_decl) = NULL_TREE; | |
4928 | METHOD_ADD_ARGS (method_decl) = NULL_TREE; | |
4929 | } | |
264fa2db | 4930 | |
d764a8e6 | 4931 | return method_decl; |
264fa2db ZL |
4932 | } |
4933 | ||
d764a8e6 | 4934 | /* This routine processes objective-c method attributes. */ |
64ee9490 | 4935 | |
d764a8e6 IS |
4936 | static void |
4937 | objc_decl_method_attributes (tree *node, tree attributes, int flags) | |
264fa2db | 4938 | { |
d764a8e6 IS |
4939 | /* TODO: Replace the hackery below. An idea would be to store the |
4940 | full function type in the method declaration (for example in | |
4941 | TREE_TYPE) and then expose ObjC method declarations to c-family | |
4942 | and they could deal with them by simply treating them as | |
4943 | functions. */ | |
264fa2db | 4944 | |
d764a8e6 IS |
4945 | /* Because of the dangers in the hackery below, we filter out any |
4946 | attribute that we do not know about. For the ones we know about, | |
4947 | we know that they work with the hackery. For the other ones, | |
4948 | there is no guarantee, so we have to filter them out. */ | |
4949 | tree filtered_attributes = NULL_TREE; | |
264fa2db | 4950 | |
d764a8e6 | 4951 | if (attributes) |
264fa2db | 4952 | { |
d764a8e6 IS |
4953 | tree attribute; |
4954 | for (attribute = attributes; attribute; attribute = TREE_CHAIN (attribute)) | |
093c7153 | 4955 | { |
d764a8e6 | 4956 | tree name = TREE_PURPOSE (attribute); |
944fb799 | 4957 | |
d764a8e6 IS |
4958 | if (is_attribute_p ("deprecated", name) |
4959 | || is_attribute_p ("sentinel", name) | |
4960 | || is_attribute_p ("noreturn", name)) | |
093c7153 | 4961 | { |
d764a8e6 IS |
4962 | /* An attribute that we support; add it to the filtered |
4963 | attributes. */ | |
944fb799 | 4964 | filtered_attributes = chainon (filtered_attributes, |
d764a8e6 | 4965 | copy_node (attribute)); |
093c7153 | 4966 | } |
d764a8e6 IS |
4967 | else if (is_attribute_p ("format", name)) |
4968 | { | |
4969 | /* "format" is special because before adding it to the | |
4970 | filtered attributes we need to adjust the specified | |
4971 | format by adding the hidden function parameters for | |
4972 | an Objective-C method (self, _cmd). */ | |
4973 | tree new_attribute = copy_node (attribute); | |
4974 | ||
4975 | /* Check the arguments specified with the attribute, and | |
4976 | modify them adding 2 for the two hidden arguments. | |
4977 | Note how this differs from C++; according to the | |
4978 | specs, C++ does not do it so you have to add the +1 | |
4979 | yourself. For Objective-C, instead, the compiler | |
4980 | adds the +2 for you. */ | |
4981 | ||
4982 | /* The attribute arguments have not been checked yet, so | |
4983 | we need to be careful as they could be missing or | |
4984 | invalid. If anything looks wrong, we skip the | |
4985 | process and the compiler will complain about it later | |
4986 | when it validates the attribute. */ | |
4987 | /* Check that we have at least three arguments. */ | |
4988 | if (TREE_VALUE (new_attribute) | |
4989 | && TREE_CHAIN (TREE_VALUE (new_attribute)) | |
4990 | && TREE_CHAIN (TREE_CHAIN (TREE_VALUE (new_attribute)))) | |
4991 | { | |
4992 | tree second_argument = TREE_CHAIN (TREE_VALUE (new_attribute)); | |
4993 | tree third_argument = TREE_CHAIN (second_argument); | |
4994 | tree number; | |
264fa2db | 4995 | |
d764a8e6 IS |
4996 | /* This is the second argument, the "string-index", |
4997 | which specifies the index of the format string | |
4998 | argument. Add 2. */ | |
4999 | number = TREE_VALUE (second_argument); | |
5000 | if (number | |
5001 | && TREE_CODE (number) == INTEGER_CST | |
5002 | && TREE_INT_CST_HIGH (number) == 0) | |
5003 | { | |
944fb799 | 5004 | TREE_VALUE (second_argument) |
d764a8e6 IS |
5005 | = build_int_cst (integer_type_node, |
5006 | TREE_INT_CST_LOW (number) + 2); | |
5007 | } | |
944fb799 | 5008 | |
d764a8e6 IS |
5009 | /* This is the third argument, the "first-to-check", |
5010 | which specifies the index of the first argument to | |
5011 | check. This could be 0, meaning it is not available, | |
5012 | in which case we don't need to add 2. Add 2 if not | |
5013 | 0. */ | |
5014 | number = TREE_VALUE (third_argument); | |
5015 | if (number | |
5016 | && TREE_CODE (number) == INTEGER_CST | |
5017 | && TREE_INT_CST_HIGH (number) == 0 | |
5018 | && TREE_INT_CST_LOW (number) != 0) | |
5019 | { | |
944fb799 | 5020 | TREE_VALUE (third_argument) |
d764a8e6 IS |
5021 | = build_int_cst (integer_type_node, |
5022 | TREE_INT_CST_LOW (number) + 2); | |
5023 | } | |
5024 | } | |
5025 | filtered_attributes = chainon (filtered_attributes, | |
5026 | new_attribute); | |
5027 | } | |
5028 | else | |
5029 | warning (OPT_Wattributes, "%qE attribute directive ignored", name); | |
093c7153 RH |
5030 | } |
5031 | } | |
264fa2db | 5032 | |
d764a8e6 | 5033 | if (filtered_attributes) |
264fa2db | 5034 | { |
d764a8e6 IS |
5035 | /* This hackery changes the TREE_TYPE of the ObjC method |
5036 | declaration to be a function type, so that decl_attributes | |
5037 | will treat the ObjC method as if it was a function. Some | |
5038 | attributes (sentinel, format) will be applied to the function | |
5039 | type, changing it in place; so after calling decl_attributes, | |
5040 | we extract the function type attributes and store them in | |
5041 | METHOD_TYPE_ATTRIBUTES. Some other attributes (noreturn, | |
5042 | deprecated) are applied directly to the method declaration | |
5043 | (by setting TREE_DEPRECATED and TREE_THIS_VOLATILE) so there | |
5044 | is nothing to do. */ | |
5045 | tree saved_type = TREE_TYPE (*node); | |
944fb799 | 5046 | TREE_TYPE (*node) = build_function_type |
d764a8e6 IS |
5047 | (TREE_VALUE (saved_type), get_arg_type_list (*node, METHOD_REF, 0)); |
5048 | decl_attributes (node, filtered_attributes, flags); | |
5049 | METHOD_TYPE_ATTRIBUTES (*node) = TYPE_ATTRIBUTES (TREE_TYPE (*node)); | |
5050 | TREE_TYPE (*node) = saved_type; | |
264fa2db | 5051 | } |
264fa2db ZL |
5052 | } |
5053 | ||
944fb799 | 5054 | bool |
d764a8e6 IS |
5055 | objc_method_decl (enum tree_code opcode) |
5056 | { | |
5057 | return opcode == INSTANCE_METHOD_DECL || opcode == CLASS_METHOD_DECL; | |
5058 | } | |
264fa2db | 5059 | |
dc2dc512 NP |
5060 | /* Used by `build_objc_method_call'. Return an argument list for |
5061 | method METH. CONTEXT is either METHOD_DEF or METHOD_REF, saying | |
5062 | whether we are trying to define a method or call one. SUPERFLAG | |
5063 | says this is for a send to super; this makes a difference for the | |
5064 | NeXT calling sequence in which the lookup and the method call are | |
5065 | done together. If METH is null, user-defined arguments (i.e., | |
5066 | beyond self and _cmd) shall be represented by `...'. */ | |
264fa2db | 5067 | |
d764a8e6 IS |
5068 | tree |
5069 | get_arg_type_list (tree meth, int context, int superflag) | |
093c7153 | 5070 | { |
d764a8e6 | 5071 | tree arglist, akey; |
093c7153 | 5072 | |
d764a8e6 IS |
5073 | /* Receiver & _cmd types are runtime-dependent. */ |
5074 | arglist = (*runtime.get_arg_type_list_base) (meth, context, superflag); | |
093c7153 | 5075 | |
d764a8e6 IS |
5076 | /* No actual method prototype given -- assume that remaining arguments |
5077 | are `...'. */ | |
5078 | if (!meth) | |
5079 | return arglist; | |
093c7153 | 5080 | |
d764a8e6 IS |
5081 | /* Build a list of argument types. */ |
5082 | for (akey = METHOD_SEL_ARGS (meth); akey; akey = DECL_CHAIN (akey)) | |
5083 | { | |
5084 | tree arg_type = TREE_VALUE (TREE_TYPE (akey)); | |
093c7153 | 5085 | |
d764a8e6 IS |
5086 | /* Decay argument types for the underlying C function as appropriate. */ |
5087 | arg_type = objc_decay_parm_type (arg_type); | |
093c7153 | 5088 | |
d764a8e6 IS |
5089 | chainon (arglist, build_tree_list (NULL_TREE, arg_type)); |
5090 | } | |
093c7153 | 5091 | |
d764a8e6 | 5092 | if (METHOD_ADD_ARGS (meth)) |
264fa2db | 5093 | { |
d764a8e6 IS |
5094 | for (akey = TREE_CHAIN (METHOD_ADD_ARGS (meth)); |
5095 | akey; akey = TREE_CHAIN (akey)) | |
5096 | { | |
5097 | tree arg_type = TREE_TYPE (TREE_VALUE (akey)); | |
5098 | ||
5099 | arg_type = objc_decay_parm_type (arg_type); | |
093c7153 | 5100 | |
d764a8e6 IS |
5101 | chainon (arglist, build_tree_list (NULL_TREE, arg_type)); |
5102 | } | |
093c7153 | 5103 | |
d764a8e6 IS |
5104 | if (!METHOD_ADD_ARGS_ELLIPSIS_P (meth)) |
5105 | goto lack_of_ellipsis; | |
264fa2db | 5106 | } |
093c7153 | 5107 | else |
d764a8e6 IS |
5108 | { |
5109 | lack_of_ellipsis: | |
5110 | chainon (arglist, OBJC_VOID_AT_END); | |
5111 | } | |
264fa2db | 5112 | |
d764a8e6 IS |
5113 | return arglist; |
5114 | } | |
264fa2db | 5115 | |
d764a8e6 IS |
5116 | static tree |
5117 | check_duplicates (hash hsh, int methods, int is_class) | |
093c7153 | 5118 | { |
d764a8e6 | 5119 | tree meth = NULL_TREE; |
264fa2db | 5120 | |
d764a8e6 IS |
5121 | if (hsh) |
5122 | { | |
5123 | meth = hsh->key; | |
264fa2db | 5124 | |
d764a8e6 IS |
5125 | if (hsh->list) |
5126 | { | |
5127 | /* We have two or more methods with the same name but | |
5128 | different types. */ | |
5129 | attr loop; | |
64ee9490 | 5130 | |
d764a8e6 IS |
5131 | /* But just how different are those types? If |
5132 | -Wno-strict-selector-match is specified, we shall not | |
5133 | complain if the differences are solely among types with | |
5134 | identical size and alignment. */ | |
5135 | if (!warn_strict_selector_match) | |
5136 | { | |
5137 | for (loop = hsh->list; loop; loop = loop->next) | |
5138 | if (!comp_proto_with_proto (meth, loop->value, 0)) | |
5139 | goto issue_warning; | |
093c7153 | 5140 | |
d764a8e6 IS |
5141 | return meth; |
5142 | } | |
093c7153 | 5143 | |
d764a8e6 IS |
5144 | issue_warning: |
5145 | if (methods) | |
5146 | { | |
5147 | bool type = TREE_CODE (meth) == INSTANCE_METHOD_DECL; | |
437c2322 | 5148 | |
d764a8e6 IS |
5149 | warning_at (input_location, 0, |
5150 | "multiple methods named %<%c%E%> found", | |
5151 | (is_class ? '+' : '-'), | |
5152 | METHOD_SEL_NAME (meth)); | |
5153 | inform (DECL_SOURCE_LOCATION (meth), "using %<%c%s%>", | |
5154 | (type ? '-' : '+'), | |
5155 | identifier_to_locale (gen_method_decl (meth))); | |
5156 | } | |
5157 | else | |
5158 | { | |
5159 | bool type = TREE_CODE (meth) == INSTANCE_METHOD_DECL; | |
437c2322 | 5160 | |
d764a8e6 IS |
5161 | warning_at (input_location, 0, |
5162 | "multiple selectors named %<%c%E%> found", | |
5163 | (is_class ? '+' : '-'), | |
5164 | METHOD_SEL_NAME (meth)); | |
5165 | inform (DECL_SOURCE_LOCATION (meth), "found %<%c%s%>", | |
5166 | (type ? '-' : '+'), | |
5167 | identifier_to_locale (gen_method_decl (meth))); | |
5168 | } | |
437c2322 | 5169 | |
d764a8e6 | 5170 | for (loop = hsh->list; loop; loop = loop->next) |
093c7153 | 5171 | { |
d764a8e6 IS |
5172 | bool type = TREE_CODE (loop->value) == INSTANCE_METHOD_DECL; |
5173 | ||
5174 | inform (DECL_SOURCE_LOCATION (loop->value), "also found %<%c%s%>", | |
5175 | (type ? '-' : '+'), | |
5176 | identifier_to_locale (gen_method_decl (loop->value))); | |
093c7153 | 5177 | } |
d764a8e6 | 5178 | } |
093c7153 | 5179 | } |
d764a8e6 | 5180 | return meth; |
093c7153 | 5181 | } |
264fa2db | 5182 | |
d764a8e6 IS |
5183 | /* If RECEIVER is a class reference, return the identifier node for |
5184 | the referenced class. RECEIVER is created by objc_get_class_reference, | |
5185 | so we check the exact form created depending on which runtimes are | |
5186 | used. */ | |
264fa2db | 5187 | |
d764a8e6 IS |
5188 | static tree |
5189 | receiver_is_class_object (tree receiver, int self, int super) | |
093c7153 | 5190 | { |
d764a8e6 | 5191 | tree exp, arg; |
264fa2db | 5192 | |
d764a8e6 IS |
5193 | /* The receiver is 'self' or 'super' in the context of a class method. */ |
5194 | if (objc_method_context | |
5195 | && TREE_CODE (objc_method_context) == CLASS_METHOD_DECL | |
5196 | && (self || super)) | |
5197 | return (super | |
5198 | ? CLASS_SUPER_NAME (implementation_template) | |
5199 | : CLASS_NAME (implementation_template)); | |
5200 | ||
5201 | /* The runtime might encapsulate things its own way. */ | |
5202 | exp = (*runtime.receiver_is_class_object) (receiver); | |
5203 | if (exp) | |
5204 | return exp; | |
5205 | ||
5206 | /* The receiver is a function call that returns an id. Check if | |
5207 | it is a call to objc_getClass, if so, pick up the class name. */ | |
5208 | if (TREE_CODE (receiver) == CALL_EXPR | |
5209 | && (exp = CALL_EXPR_FN (receiver)) | |
5210 | && TREE_CODE (exp) == ADDR_EXPR | |
5211 | && (exp = TREE_OPERAND (exp, 0)) | |
5212 | && TREE_CODE (exp) == FUNCTION_DECL | |
5213 | /* For some reason, we sometimes wind up with multiple FUNCTION_DECL | |
5214 | prototypes for objc_get_class(). Thankfully, they seem to share the | |
5215 | same function type. */ | |
5216 | && TREE_TYPE (exp) == TREE_TYPE (objc_get_class_decl) | |
5217 | && !strcmp (IDENTIFIER_POINTER (DECL_NAME (exp)), runtime.tag_getclass) | |
5218 | /* We have a call to objc_get_class/objc_getClass! */ | |
5219 | && (arg = CALL_EXPR_ARG (receiver, 0))) | |
5220 | { | |
5221 | STRIP_NOPS (arg); | |
5222 | if (TREE_CODE (arg) == ADDR_EXPR | |
5223 | && (arg = TREE_OPERAND (arg, 0)) | |
5224 | && TREE_CODE (arg) == STRING_CST) | |
5225 | /* Finally, we have the class name. */ | |
5226 | return get_identifier (TREE_STRING_POINTER (arg)); | |
5227 | } | |
5228 | return 0; | |
264fa2db ZL |
5229 | } |
5230 | ||
d764a8e6 IS |
5231 | /* If we are currently building a message expr, this holds |
5232 | the identifier of the selector of the message. This is | |
5233 | used when printing warnings about argument mismatches. */ | |
264fa2db | 5234 | |
d764a8e6 IS |
5235 | static tree current_objc_message_selector = 0; |
5236 | ||
5237 | tree | |
5238 | objc_message_selector (void) | |
093c7153 | 5239 | { |
d764a8e6 | 5240 | return current_objc_message_selector; |
093c7153 | 5241 | } |
264fa2db | 5242 | |
d764a8e6 IS |
5243 | /* Construct an expression for sending a message. |
5244 | MESS has the object to send to in TREE_PURPOSE | |
5245 | and the argument list (including selector) in TREE_VALUE. | |
5246 | ||
5247 | (*(<abstract_decl>(*)())_msg)(receiver, selTransTbl[n], ...); | |
5248 | (*(<abstract_decl>(*)())_msgSuper)(receiver, selTransTbl[n], ...); */ | |
264fa2db | 5249 | |
38b9c8c3 | 5250 | tree |
eb345401 | 5251 | objc_build_message_expr (tree receiver, tree message_args) |
093c7153 | 5252 | { |
d764a8e6 IS |
5253 | tree sel_name; |
5254 | #ifdef OBJCPLUS | |
eb345401 | 5255 | tree args = TREE_PURPOSE (message_args); |
d764a8e6 | 5256 | #else |
eb345401 | 5257 | tree args = message_args; |
d764a8e6 IS |
5258 | #endif |
5259 | tree method_params = NULL_TREE; | |
093c7153 | 5260 | |
d764a8e6 IS |
5261 | if (TREE_CODE (receiver) == ERROR_MARK || TREE_CODE (args) == ERROR_MARK) |
5262 | return error_mark_node; | |
264fa2db | 5263 | |
d764a8e6 IS |
5264 | /* Obtain the full selector name. */ |
5265 | switch (TREE_CODE (args)) | |
093c7153 | 5266 | { |
d764a8e6 IS |
5267 | case IDENTIFIER_NODE: |
5268 | /* A unary selector. */ | |
5269 | sel_name = args; | |
5270 | break; | |
5271 | case TREE_LIST: | |
5272 | sel_name = build_keyword_selector (args); | |
5273 | break; | |
5274 | default: | |
5275 | gcc_unreachable (); | |
093c7153 | 5276 | } |
d764a8e6 IS |
5277 | |
5278 | /* Build the parameter list to give to the method. */ | |
5279 | if (TREE_CODE (args) == TREE_LIST) | |
5280 | #ifdef OBJCPLUS | |
eb345401 | 5281 | method_params = chainon (args, TREE_VALUE (message_args)); |
d764a8e6 | 5282 | #else |
093c7153 | 5283 | { |
d764a8e6 IS |
5284 | tree chain = args, prev = NULL_TREE; |
5285 | ||
5286 | /* We have a keyword selector--check for comma expressions. */ | |
5287 | while (chain) | |
093c7153 | 5288 | { |
d764a8e6 IS |
5289 | tree element = TREE_VALUE (chain); |
5290 | ||
5291 | /* We have a comma expression, must collapse... */ | |
5292 | if (TREE_CODE (element) == TREE_LIST) | |
5293 | { | |
5294 | if (prev) | |
5295 | TREE_CHAIN (prev) = element; | |
5296 | else | |
5297 | args = element; | |
5298 | } | |
5299 | prev = chain; | |
5300 | chain = TREE_CHAIN (chain); | |
5301 | } | |
5302 | method_params = args; | |
093c7153 | 5303 | } |
d764a8e6 | 5304 | #endif |
093c7153 | 5305 | |
d764a8e6 IS |
5306 | #ifdef OBJCPLUS |
5307 | if (processing_template_decl) | |
5308 | /* Must wait until template instantiation time. */ | |
5309 | return build_min_nt (MESSAGE_SEND_EXPR, receiver, sel_name, | |
5310 | method_params); | |
5311 | #endif | |
5312 | ||
5313 | return objc_finish_message_expr (receiver, sel_name, method_params, NULL); | |
264fa2db ZL |
5314 | } |
5315 | ||
d764a8e6 IS |
5316 | /* Look up method SEL_NAME that would be suitable for receiver |
5317 | of type 'id' (if IS_CLASS is zero) or 'Class' (if IS_CLASS is | |
5318 | nonzero), and report on any duplicates. */ | |
506e2710 | 5319 | |
d764a8e6 IS |
5320 | static tree |
5321 | lookup_method_in_hash_lists (tree sel_name, int is_class) | |
5322 | { | |
5323 | hash method_prototype = NULL; | |
264fa2db | 5324 | |
d764a8e6 IS |
5325 | if (!is_class) |
5326 | method_prototype = hash_lookup (nst_method_hash_list, | |
5327 | sel_name); | |
093c7153 | 5328 | |
d764a8e6 | 5329 | if (!method_prototype) |
6347cf31 | 5330 | { |
d764a8e6 IS |
5331 | method_prototype = hash_lookup (cls_method_hash_list, |
5332 | sel_name); | |
5333 | is_class = 1; | |
6347cf31 | 5334 | } |
093c7153 | 5335 | |
d764a8e6 | 5336 | return check_duplicates (method_prototype, 1, is_class); |
264fa2db ZL |
5337 | } |
5338 | ||
d764a8e6 IS |
5339 | /* The 'objc_finish_message_expr' routine is called from within |
5340 | 'objc_build_message_expr' for non-template functions. In the case of | |
5341 | C++ template functions, it is called from 'build_expr_from_tree' | |
5342 | (in decl2.c) after RECEIVER and METHOD_PARAMS have been expanded. | |
5343 | ||
5344 | If the DEPRECATED_METHOD_PROTOTYPE argument is NULL, then we warn | |
5345 | if the method being used is deprecated. If it is not NULL, instead | |
5346 | of deprecating, we set *DEPRECATED_METHOD_PROTOTYPE to the method | |
5347 | prototype that was used and is deprecated. This is useful for | |
5348 | getter calls that are always generated when compiling dot-syntax | |
5349 | expressions, even if they may not be used. In that case, we don't | |
5350 | want the warning immediately; we produce it (if needed) at gimplify | |
5351 | stage when we are sure that the deprecated getter is being | |
5352 | used. */ | |
38b9c8c3 | 5353 | tree |
d764a8e6 IS |
5354 | objc_finish_message_expr (tree receiver, tree sel_name, tree method_params, |
5355 | tree *deprecated_method_prototype) | |
37153b1e | 5356 | { |
d764a8e6 IS |
5357 | tree method_prototype = NULL_TREE, rprotos = NULL_TREE, rtype; |
5358 | tree retval, class_tree; | |
5359 | int self, super, have_cast; | |
37153b1e | 5360 | |
d764a8e6 IS |
5361 | /* We have used the receiver, so mark it as read. */ |
5362 | mark_exp_read (receiver); | |
5363 | ||
5364 | /* Extract the receiver of the message, as well as its type | |
5365 | (where the latter may take the form of a cast or be inferred | |
5366 | from the implementation context). */ | |
5367 | rtype = receiver; | |
5368 | while (TREE_CODE (rtype) == COMPOUND_EXPR | |
5369 | || TREE_CODE (rtype) == MODIFY_EXPR | |
5370 | || CONVERT_EXPR_P (rtype) | |
5371 | || TREE_CODE (rtype) == COMPONENT_REF) | |
5372 | rtype = TREE_OPERAND (rtype, 0); | |
5373 | ||
5374 | self = (rtype == self_decl); | |
5375 | super = (rtype == UOBJC_SUPER_decl); | |
5376 | rtype = TREE_TYPE (receiver); | |
5377 | ||
5378 | have_cast = (TREE_CODE (receiver) == NOP_EXPR | |
5379 | || (TREE_CODE (receiver) == COMPOUND_EXPR | |
5380 | && !IS_SUPER (rtype))); | |
5381 | ||
5382 | /* If we are calling [super dealloc], reset our warning flag. */ | |
5383 | if (super && !strcmp ("dealloc", IDENTIFIER_POINTER (sel_name))) | |
5384 | should_call_super_dealloc = 0; | |
5385 | ||
5386 | /* If the receiver is a class object, retrieve the corresponding | |
5387 | @interface, if one exists. */ | |
5388 | class_tree = receiver_is_class_object (receiver, self, super); | |
5389 | ||
5390 | /* Now determine the receiver type (if an explicit cast has not been | |
5391 | provided). */ | |
5392 | if (!have_cast) | |
37153b1e | 5393 | { |
d764a8e6 IS |
5394 | if (class_tree) |
5395 | rtype = lookup_interface (class_tree); | |
5396 | /* Handle `self' and `super'. */ | |
5397 | else if (super) | |
37153b1e | 5398 | { |
d764a8e6 IS |
5399 | if (!CLASS_SUPER_NAME (implementation_template)) |
5400 | { | |
5401 | error ("no super class declared in @interface for %qE", | |
5402 | CLASS_NAME (implementation_template)); | |
5403 | return error_mark_node; | |
5404 | } | |
5405 | rtype = lookup_interface (CLASS_SUPER_NAME (implementation_template)); | |
37153b1e | 5406 | } |
d764a8e6 IS |
5407 | else if (self) |
5408 | rtype = lookup_interface (CLASS_NAME (implementation_template)); | |
37153b1e | 5409 | } |
d764a8e6 IS |
5410 | |
5411 | /* If receiver is of type `id' or `Class' (or if the @interface for a | |
5412 | class is not visible), we shall be satisfied with the existence of | |
5413 | any instance or class method. */ | |
5414 | if (objc_is_id (rtype)) | |
37153b1e | 5415 | { |
d764a8e6 IS |
5416 | class_tree = (IS_CLASS (rtype) ? objc_class_name : NULL_TREE); |
5417 | rprotos = (TYPE_HAS_OBJC_INFO (TREE_TYPE (rtype)) | |
5418 | ? TYPE_OBJC_PROTOCOL_LIST (TREE_TYPE (rtype)) | |
5419 | : NULL_TREE); | |
5420 | rtype = NULL_TREE; | |
5421 | ||
5422 | if (rprotos) | |
5423 | { | |
5424 | /* If messaging 'id <Protos>' or 'Class <Proto>', first search | |
5425 | in protocols themselves for the method prototype. */ | |
5426 | method_prototype | |
5427 | = lookup_method_in_protocol_list (rprotos, sel_name, | |
5428 | class_tree != NULL_TREE); | |
5429 | ||
5430 | /* If messaging 'Class <Proto>' but did not find a class method | |
5431 | prototype, search for an instance method instead, and warn | |
5432 | about having done so. */ | |
5433 | if (!method_prototype && !rtype && class_tree != NULL_TREE) | |
5434 | { | |
5435 | method_prototype | |
5436 | = lookup_method_in_protocol_list (rprotos, sel_name, 0); | |
5437 | ||
5438 | if (method_prototype) | |
5439 | warning (0, "found %<-%E%> instead of %<+%E%> in protocol(s)", | |
5440 | sel_name, sel_name); | |
5441 | } | |
5442 | } | |
37153b1e | 5443 | } |
d764a8e6 | 5444 | else if (rtype) |
37153b1e | 5445 | { |
d764a8e6 | 5446 | tree orig_rtype = rtype; |
37153b1e | 5447 | |
d764a8e6 IS |
5448 | if (TREE_CODE (rtype) == POINTER_TYPE) |
5449 | rtype = TREE_TYPE (rtype); | |
5450 | /* Traverse typedef aliases */ | |
5451 | while (TREE_CODE (rtype) == RECORD_TYPE && OBJC_TYPE_NAME (rtype) | |
5452 | && TREE_CODE (OBJC_TYPE_NAME (rtype)) == TYPE_DECL | |
5453 | && DECL_ORIGINAL_TYPE (OBJC_TYPE_NAME (rtype))) | |
5454 | rtype = DECL_ORIGINAL_TYPE (OBJC_TYPE_NAME (rtype)); | |
5455 | if (TYPED_OBJECT (rtype)) | |
5456 | { | |
5457 | rprotos = TYPE_OBJC_PROTOCOL_LIST (rtype); | |
5458 | rtype = TYPE_OBJC_INTERFACE (rtype); | |
5459 | } | |
5460 | /* If we could not find an @interface declaration, we must have | |
5461 | only seen a @class declaration; so, we cannot say anything | |
5462 | more intelligent about which methods the receiver will | |
5463 | understand. */ | |
5464 | if (!rtype || TREE_CODE (rtype) == IDENTIFIER_NODE) | |
5465 | { | |
5466 | rtype = NULL_TREE; | |
944fb799 | 5467 | /* We could not find an @interface declaration, yet Message maybe in a |
d764a8e6 IS |
5468 | @class's protocol. */ |
5469 | if (!method_prototype && rprotos) | |
5470 | method_prototype | |
5471 | = lookup_method_in_protocol_list (rprotos, sel_name, 0); | |
5472 | } | |
5473 | else if (TREE_CODE (rtype) == CLASS_INTERFACE_TYPE | |
5474 | || TREE_CODE (rtype) == CLASS_IMPLEMENTATION_TYPE) | |
5475 | { | |
5476 | /* We have a valid ObjC class name. Look up the method name | |
5477 | in the published @interface for the class (and its | |
5478 | superclasses). */ | |
5479 | method_prototype | |
5480 | = lookup_method_static (rtype, sel_name, class_tree != NULL_TREE); | |
37153b1e | 5481 | |
d764a8e6 IS |
5482 | /* If the method was not found in the @interface, it may still |
5483 | exist locally as part of the @implementation. */ | |
5484 | if (!method_prototype && objc_implementation_context | |
5485 | && CLASS_NAME (objc_implementation_context) | |
5486 | == OBJC_TYPE_NAME (rtype)) | |
5487 | method_prototype | |
5488 | = lookup_method | |
5489 | ((class_tree | |
5490 | ? CLASS_CLS_METHODS (objc_implementation_context) | |
5491 | : CLASS_NST_METHODS (objc_implementation_context)), | |
5492 | sel_name); | |
37153b1e | 5493 | |
d764a8e6 IS |
5494 | /* If we haven't found a candidate method by now, try looking for |
5495 | it in the protocol list. */ | |
5496 | if (!method_prototype && rprotos) | |
5497 | method_prototype | |
5498 | = lookup_method_in_protocol_list (rprotos, sel_name, | |
5499 | class_tree != NULL_TREE); | |
5500 | } | |
5501 | else | |
5502 | { | |
5503 | warning (0, "invalid receiver type %qs", | |
5504 | identifier_to_locale (gen_type_name (orig_rtype))); | |
5505 | /* After issuing the "invalid receiver" warning, perform method | |
5506 | lookup as if we were messaging 'id'. */ | |
5507 | rtype = rprotos = NULL_TREE; | |
5508 | } | |
37153b1e | 5509 | } |
264fa2db | 5510 | |
264fa2db | 5511 | |
d764a8e6 IS |
5512 | /* For 'id' or 'Class' receivers, search in the global hash table |
5513 | as a last resort. For all receivers, warn if protocol searches | |
5514 | have failed. */ | |
5515 | if (!method_prototype) | |
5516 | { | |
5517 | if (rprotos) | |
5518 | warning (0, "%<%c%E%> not found in protocol(s)", | |
5519 | (class_tree ? '+' : '-'), | |
5520 | sel_name); | |
264fa2db | 5521 | |
d764a8e6 IS |
5522 | if (!rtype) |
5523 | method_prototype | |
5524 | = lookup_method_in_hash_lists (sel_name, class_tree != NULL_TREE); | |
5525 | } | |
264fa2db | 5526 | |
944fb799 | 5527 | if (!method_prototype) |
d764a8e6 IS |
5528 | { |
5529 | static bool warn_missing_methods = false; | |
264fa2db | 5530 | |
d764a8e6 IS |
5531 | if (rtype) |
5532 | warning (0, "%qE may not respond to %<%c%E%>", | |
5533 | OBJC_TYPE_NAME (rtype), | |
5534 | (class_tree ? '+' : '-'), | |
5535 | sel_name); | |
5536 | /* If we are messaging an 'id' or 'Class' object and made it here, | |
5537 | then we have failed to find _any_ instance or class method, | |
5538 | respectively. */ | |
5539 | else | |
5540 | warning (0, "no %<%c%E%> method found", | |
5541 | (class_tree ? '+' : '-'), | |
5542 | sel_name); | |
38b9c8c3 | 5543 | |
d764a8e6 IS |
5544 | if (!warn_missing_methods) |
5545 | { | |
944fb799 | 5546 | warning_at (input_location, |
d764a8e6 | 5547 | 0, "(Messages without a matching method signature"); |
944fb799 | 5548 | warning_at (input_location, |
d764a8e6 | 5549 | 0, "will be assumed to return %<id%> and accept"); |
944fb799 | 5550 | warning_at (input_location, |
d764a8e6 IS |
5551 | 0, "%<...%> as arguments.)"); |
5552 | warn_missing_methods = true; | |
5553 | } | |
5554 | } | |
5555 | else | |
5556 | { | |
5557 | /* Warn if the method is deprecated, but not if the receiver is | |
5558 | a generic 'id'. 'id' is used to cast an object to a generic | |
5559 | object of an unspecified class; in that case, we'll use | |
5560 | whatever method prototype we can find to get the method | |
5561 | argument and return types, but it is not appropriate to | |
5562 | produce deprecation warnings since we don't know the class | |
5563 | that the object will be of at runtime. The @interface(s) for | |
5564 | that class may not even be available to the compiler right | |
5565 | now, and it is perfectly possible that the method is marked | |
5566 | as non-deprecated in such @interface(s). | |
e31c7eec | 5567 | |
d764a8e6 IS |
5568 | In practice this makes sense since casting an object to 'id' |
5569 | is often used precisely to turn off warnings associated with | |
5570 | the object being of a particular class. */ | |
5571 | if (TREE_DEPRECATED (method_prototype) && rtype != NULL_TREE) | |
5572 | { | |
5573 | if (deprecated_method_prototype) | |
5574 | *deprecated_method_prototype = method_prototype; | |
5575 | else | |
5576 | warn_deprecated_use (method_prototype, NULL_TREE); | |
5577 | } | |
5578 | } | |
093c7153 | 5579 | |
d764a8e6 IS |
5580 | /* Save the selector name for printing error messages. */ |
5581 | current_objc_message_selector = sel_name; | |
093c7153 | 5582 | |
d764a8e6 | 5583 | /* Build the method call. |
944fb799 | 5584 | TODO: Get the location from somewhere that will work for delayed |
d764a8e6 | 5585 | expansion. */ |
944fb799 | 5586 | |
d764a8e6 IS |
5587 | retval = (*runtime.build_objc_method_call) (input_location, method_prototype, |
5588 | receiver, rtype, sel_name, | |
5589 | method_params, super); | |
093c7153 | 5590 | |
d764a8e6 | 5591 | current_objc_message_selector = 0; |
093c7153 | 5592 | |
d764a8e6 IS |
5593 | return retval; |
5594 | } | |
5595 | \f | |
e31c7eec | 5596 | |
944fb799 | 5597 | /* This routine creates a static variable used to implement @protocol(MyProtocol) |
d764a8e6 IS |
5598 | expression. This variable will be initialized to global protocol_t meta-data |
5599 | pointer. */ | |
e31c7eec | 5600 | |
d764a8e6 IS |
5601 | /* This function is called by the parser when (and only when) a |
5602 | @protocol() expression is found, in order to compile it. */ | |
5603 | tree | |
5604 | objc_build_protocol_expr (tree protoname) | |
5605 | { | |
5606 | tree p = lookup_protocol (protoname, /* warn if deprecated */ true, | |
5607 | /* definition_required */ false); | |
d4e72c58 | 5608 | |
d764a8e6 IS |
5609 | if (!p) |
5610 | { | |
5611 | error ("cannot find protocol declaration for %qE", protoname); | |
5612 | return error_mark_node; | |
e31c7eec | 5613 | } |
e31c7eec | 5614 | |
d764a8e6 IS |
5615 | return (*runtime.get_protocol_reference) (input_location, p); |
5616 | } | |
e31c7eec | 5617 | |
d764a8e6 IS |
5618 | /* This function is called by the parser when a @selector() expression |
5619 | is found, in order to compile it. It is only called by the parser | |
5620 | and only to compile a @selector(). LOC is the location of the | |
5621 | @selector. */ | |
5622 | tree | |
5623 | objc_build_selector_expr (location_t loc, tree selnamelist) | |
e31c7eec | 5624 | { |
d764a8e6 | 5625 | tree selname; |
e31c7eec | 5626 | |
d764a8e6 IS |
5627 | /* Obtain the full selector name. */ |
5628 | switch (TREE_CODE (selnamelist)) | |
5629 | { | |
5630 | case IDENTIFIER_NODE: | |
5631 | /* A unary selector. */ | |
5632 | selname = selnamelist; | |
5633 | break; | |
5634 | case TREE_LIST: | |
5635 | selname = build_keyword_selector (selnamelist); | |
5636 | break; | |
5637 | default: | |
5638 | gcc_unreachable (); | |
5639 | } | |
e31c7eec | 5640 | |
d764a8e6 IS |
5641 | /* If we are required to check @selector() expressions as they |
5642 | are found, check that the selector has been declared. */ | |
5643 | if (warn_undeclared_selector) | |
5644 | { | |
5645 | /* Look the selector up in the list of all known class and | |
5646 | instance methods (up to this line) to check that the selector | |
5647 | exists. */ | |
5648 | hash hsh; | |
e31c7eec | 5649 | |
d764a8e6 IS |
5650 | /* First try with instance methods. */ |
5651 | hsh = hash_lookup (nst_method_hash_list, selname); | |
e31c7eec | 5652 | |
d764a8e6 IS |
5653 | /* If not found, try with class methods. */ |
5654 | if (!hsh) | |
5655 | { | |
5656 | hsh = hash_lookup (cls_method_hash_list, selname); | |
5657 | } | |
e31c7eec | 5658 | |
d764a8e6 IS |
5659 | /* If still not found, print out a warning. */ |
5660 | if (!hsh) | |
5661 | { | |
5662 | warning (0, "undeclared selector %qE", selname); | |
5663 | } | |
5664 | } | |
e31c7eec | 5665 | |
d764a8e6 IS |
5666 | /* The runtimes do this differently, most particularly, GNU has typed |
5667 | selectors, whilst NeXT does not. */ | |
5668 | return (*runtime.build_selector_reference) (loc, selname, NULL_TREE); | |
e31c7eec TW |
5669 | } |
5670 | ||
d764a8e6 IS |
5671 | /* This is used to implement @encode(). See gcc/doc/objc.texi, |
5672 | section '@encode'. */ | |
5673 | tree | |
5674 | objc_build_encode_expr (tree type) | |
e31c7eec | 5675 | { |
d764a8e6 IS |
5676 | tree result; |
5677 | const char *string; | |
30c0e2df | 5678 | |
d764a8e6 IS |
5679 | encode_type (type, obstack_object_size (&util_obstack), |
5680 | OBJC_ENCODE_INLINE_DEFS); | |
5681 | obstack_1grow (&util_obstack, 0); /* null terminate string */ | |
5682 | string = XOBFINISH (&util_obstack, const char *); | |
e31c7eec | 5683 | |
d764a8e6 IS |
5684 | /* Synthesize a string that represents the encoded struct/union. */ |
5685 | result = my_build_string (strlen (string) + 1, string); | |
5686 | obstack_free (&util_obstack, util_firstobj); | |
5687 | return result; | |
5688 | } | |
e31c7eec | 5689 | |
d764a8e6 IS |
5690 | static tree |
5691 | build_ivar_reference (tree id) | |
5692 | { | |
5693 | tree base; | |
5694 | if (TREE_CODE (objc_method_context) == CLASS_METHOD_DECL) | |
5695 | { | |
5696 | /* Historically, a class method that produced objects (factory | |
5697 | method) would assign `self' to the instance that it | |
5698 | allocated. This would effectively turn the class method into | |
5699 | an instance method. Following this assignment, the instance | |
5700 | variables could be accessed. That practice, while safe, | |
5701 | violates the simple rule that a class method should not refer | |
5702 | to an instance variable. It's better to catch the cases | |
5703 | where this is done unknowingly than to support the above | |
5704 | paradigm. */ | |
5705 | warning (0, "instance variable %qE accessed in class method", | |
5706 | id); | |
5707 | self_decl = convert (objc_instance_type, self_decl); /* cast */ | |
e31c7eec | 5708 | } |
e31c7eec | 5709 | |
d764a8e6 IS |
5710 | base = build_indirect_ref (input_location, self_decl, RO_ARROW); |
5711 | return (*runtime.build_ivar_reference) (input_location, base, id); | |
e31c7eec TW |
5712 | } |
5713 | ||
d764a8e6 | 5714 | /* Compute a hash value for a given method SEL_NAME. */ |
e31c7eec | 5715 | |
d764a8e6 IS |
5716 | static size_t |
5717 | hash_func (tree sel_name) | |
e31c7eec | 5718 | { |
d764a8e6 IS |
5719 | const unsigned char *s |
5720 | = (const unsigned char *)IDENTIFIER_POINTER (sel_name); | |
5721 | size_t h = 0; | |
e31c7eec | 5722 | |
d764a8e6 IS |
5723 | while (*s) |
5724 | h = h * 67 + *s++ - 113; | |
5725 | return h; | |
5726 | } | |
e31c7eec | 5727 | |
d764a8e6 IS |
5728 | static void |
5729 | hash_init (void) | |
5730 | { | |
5731 | nst_method_hash_list = ggc_alloc_cleared_vec_hash (SIZEHASHTABLE); | |
5732 | cls_method_hash_list = ggc_alloc_cleared_vec_hash (SIZEHASHTABLE); | |
e31c7eec | 5733 | |
d764a8e6 IS |
5734 | cls_name_hash_list = ggc_alloc_cleared_vec_hash (SIZEHASHTABLE); |
5735 | als_name_hash_list = ggc_alloc_cleared_vec_hash (SIZEHASHTABLE); | |
e31c7eec | 5736 | |
d764a8e6 | 5737 | ivar_offset_hash_list = ggc_alloc_cleared_vec_hash (SIZEHASHTABLE); |
e31c7eec | 5738 | |
d764a8e6 IS |
5739 | /* Initialize the hash table used to hold the constant string objects. */ |
5740 | string_htab = htab_create_ggc (31, string_hash, | |
5741 | string_eq, NULL); | |
e31c7eec TW |
5742 | } |
5743 | ||
d764a8e6 IS |
5744 | /* This routine adds sel_name to the hash list. sel_name is a class or alias |
5745 | name for the class. If alias name, then value is its underlying class. | |
5746 | If class, the value is NULL_TREE. */ | |
e31c7eec | 5747 | |
d764a8e6 IS |
5748 | static void |
5749 | hash_class_name_enter (hash *hashlist, tree sel_name, tree value) | |
5750 | { | |
5751 | hash obj; | |
5752 | int slot = hash_func (sel_name) % SIZEHASHTABLE; | |
e31c7eec | 5753 | |
d764a8e6 IS |
5754 | obj = ggc_alloc_hashed_entry (); |
5755 | if (value != NULL_TREE) | |
5756 | { | |
5757 | /* Save the underlying class for the 'alias' in the hash table */ | |
5758 | attr obj_attr = ggc_alloc_hashed_attribute (); | |
5759 | obj_attr->value = value; | |
5760 | obj->list = obj_attr; | |
5761 | } | |
5762 | else | |
5763 | obj->list = 0; | |
5764 | obj->next = hashlist[slot]; | |
5765 | obj->key = sel_name; | |
e31c7eec | 5766 | |
d764a8e6 | 5767 | hashlist[slot] = obj; /* append to front */ |
e31c7eec | 5768 | |
e31c7eec TW |
5769 | } |
5770 | ||
d764a8e6 IS |
5771 | /* |
5772 | Searches in the hash table looking for a match for class or alias name. | |
5773 | */ | |
5774 | ||
5775 | static hash | |
5776 | hash_class_name_lookup (hash *hashlist, tree sel_name) | |
264fa2db | 5777 | { |
d764a8e6 | 5778 | hash target; |
30c0e2df | 5779 | |
d764a8e6 | 5780 | target = hashlist[hash_func (sel_name) % SIZEHASHTABLE]; |
e31c7eec | 5781 | |
d764a8e6 IS |
5782 | while (target) |
5783 | { | |
5784 | if (sel_name == target->key) | |
5785 | return target; | |
5786 | ||
5787 | target = target->next; | |
5788 | } | |
5789 | return 0; | |
e31c7eec TW |
5790 | } |
5791 | ||
d764a8e6 IS |
5792 | /* WARNING!!!! hash_enter is called with a method, and will peek |
5793 | inside to find its selector! But hash_lookup is given a selector | |
5794 | directly, and looks for the selector that's inside the found | |
5795 | entry's key (method) for comparison. */ | |
177b48f9 | 5796 | |
d764a8e6 IS |
5797 | static void |
5798 | hash_enter (hash *hashlist, tree method) | |
e31c7eec | 5799 | { |
d764a8e6 IS |
5800 | hash obj; |
5801 | int slot = hash_func (METHOD_SEL_NAME (method)) % SIZEHASHTABLE; | |
e31c7eec | 5802 | |
d764a8e6 IS |
5803 | obj = ggc_alloc_hashed_entry (); |
5804 | obj->list = 0; | |
5805 | obj->next = hashlist[slot]; | |
5806 | obj->key = method; | |
e31c7eec | 5807 | |
d764a8e6 IS |
5808 | hashlist[slot] = obj; /* append to front */ |
5809 | } | |
e31c7eec | 5810 | |
d764a8e6 IS |
5811 | static hash |
5812 | hash_lookup (hash *hashlist, tree sel_name) | |
5813 | { | |
5814 | hash target; | |
5815 | ||
5816 | target = hashlist[hash_func (sel_name) % SIZEHASHTABLE]; | |
5817 | ||
5818 | while (target) | |
e31c7eec | 5819 | { |
d764a8e6 IS |
5820 | if (sel_name == METHOD_SEL_NAME (target->key)) |
5821 | return target; | |
e31c7eec | 5822 | |
d764a8e6 | 5823 | target = target->next; |
e31c7eec | 5824 | } |
d764a8e6 IS |
5825 | return 0; |
5826 | } | |
e31c7eec | 5827 | |
d764a8e6 IS |
5828 | static void |
5829 | hash_add_attr (hash entry, tree value) | |
5830 | { | |
5831 | attr obj; | |
e31c7eec | 5832 | |
d764a8e6 IS |
5833 | obj = ggc_alloc_hashed_attribute (); |
5834 | obj->next = entry->list; | |
5835 | obj->value = value; | |
264fa2db | 5836 | |
d764a8e6 IS |
5837 | entry->list = obj; /* append to front */ |
5838 | } | |
5839 | \f | |
5840 | static tree | |
5841 | lookup_method (tree mchain, tree method) | |
5842 | { | |
5843 | tree key; | |
e31c7eec | 5844 | |
d764a8e6 IS |
5845 | if (TREE_CODE (method) == IDENTIFIER_NODE) |
5846 | key = method; | |
5847 | else | |
5848 | key = METHOD_SEL_NAME (method); | |
e31c7eec | 5849 | |
d764a8e6 IS |
5850 | while (mchain) |
5851 | { | |
5852 | if (METHOD_SEL_NAME (mchain) == key) | |
5853 | return mchain; | |
011d50d9 | 5854 | |
d764a8e6 | 5855 | mchain = DECL_CHAIN (mchain); |
e31c7eec | 5856 | } |
d764a8e6 | 5857 | return NULL_TREE; |
e31c7eec TW |
5858 | } |
5859 | ||
d764a8e6 IS |
5860 | /* Look up a class (if OBJC_LOOKUP_CLASS is set in FLAGS) or instance |
5861 | method in INTERFACE, along with any categories and protocols | |
5862 | attached thereto. If method is not found, and the | |
5863 | OBJC_LOOKUP_NO_SUPER is _not_ set in FLAGS, recursively examine the | |
5864 | INTERFACE's superclass. If OBJC_LOOKUP_CLASS is set, | |
5865 | OBJC_LOOKUP_NO_SUPER is clear, and no suitable class method could | |
5866 | be found in INTERFACE or any of its superclasses, look for an | |
5867 | _instance_ method of the same name in the root class as a last | |
5868 | resort. This behaviour can be turned off by using | |
5869 | OBJC_LOOKUP_NO_INSTANCE_METHODS_OF_ROOT_CLASS. | |
e31c7eec | 5870 | |
d764a8e6 | 5871 | If a suitable method cannot be found, return NULL_TREE. */ |
e31c7eec | 5872 | |
d764a8e6 IS |
5873 | static tree |
5874 | lookup_method_static (tree interface, tree ident, int flags) | |
5875 | { | |
5876 | tree meth = NULL_TREE, root_inter = NULL_TREE; | |
5877 | tree inter = interface; | |
5878 | int is_class = (flags & OBJC_LOOKUP_CLASS); | |
5879 | int no_superclasses = (flags & OBJC_LOOKUP_NO_SUPER); | |
5880 | int no_instance_methods_of_root_class = (flags & OBJC_LOOKUP_NO_INSTANCE_METHODS_OF_ROOT_CLASS); | |
e31c7eec | 5881 | |
d764a8e6 IS |
5882 | while (inter) |
5883 | { | |
5884 | tree chain = is_class ? CLASS_CLS_METHODS (inter) : CLASS_NST_METHODS (inter); | |
5885 | tree category = inter; | |
e31c7eec | 5886 | |
d764a8e6 IS |
5887 | /* First, look up the method in the class itself. */ |
5888 | if ((meth = lookup_method (chain, ident))) | |
5889 | return meth; | |
e31c7eec | 5890 | |
d764a8e6 IS |
5891 | /* Failing that, look for the method in each category of the class. */ |
5892 | while ((category = CLASS_CATEGORY_LIST (category))) | |
5893 | { | |
5894 | chain = is_class ? CLASS_CLS_METHODS (category) : CLASS_NST_METHODS (category); | |
e31c7eec | 5895 | |
d764a8e6 IS |
5896 | /* Check directly in each category. */ |
5897 | if ((meth = lookup_method (chain, ident))) | |
5898 | return meth; | |
e31c7eec | 5899 | |
d764a8e6 IS |
5900 | /* Failing that, check in each category's protocols. */ |
5901 | if (CLASS_PROTOCOL_LIST (category)) | |
5902 | { | |
5903 | if ((meth = (lookup_method_in_protocol_list | |
5904 | (CLASS_PROTOCOL_LIST (category), ident, is_class)))) | |
5905 | return meth; | |
5906 | } | |
5907 | } | |
e31c7eec | 5908 | |
d764a8e6 IS |
5909 | /* If not found in categories, check in protocols of the main class. */ |
5910 | if (CLASS_PROTOCOL_LIST (inter)) | |
5911 | { | |
5912 | if ((meth = (lookup_method_in_protocol_list | |
5913 | (CLASS_PROTOCOL_LIST (inter), ident, is_class)))) | |
5914 | return meth; | |
5915 | } | |
e31c7eec | 5916 | |
d764a8e6 IS |
5917 | /* If we were instructed not to look in superclasses, don't. */ |
5918 | if (no_superclasses) | |
5919 | return NULL_TREE; | |
89ef1046 | 5920 | |
d764a8e6 IS |
5921 | /* Failing that, climb up the inheritance hierarchy. */ |
5922 | root_inter = inter; | |
5923 | inter = lookup_interface (CLASS_SUPER_NAME (inter)); | |
e31c7eec | 5924 | } |
d764a8e6 | 5925 | while (inter); |
e31c7eec | 5926 | |
d764a8e6 | 5927 | if (is_class && !no_instance_methods_of_root_class) |
e31c7eec | 5928 | { |
d764a8e6 IS |
5929 | /* If no class (factory) method was found, check if an _instance_ |
5930 | method of the same name exists in the root class. This is what | |
5931 | the Objective-C runtime will do. */ | |
5932 | return lookup_method_static (root_inter, ident, 0); | |
e31c7eec TW |
5933 | } |
5934 | else | |
d764a8e6 | 5935 | { |
944fb799 | 5936 | /* If an instance method was not found, return 0. */ |
d764a8e6 IS |
5937 | return NULL_TREE; |
5938 | } | |
e31c7eec TW |
5939 | } |
5940 | ||
d764a8e6 IS |
5941 | /* Add the method to the hash list if it doesn't contain an identical |
5942 | method already. */ | |
5943 | ||
e31c7eec | 5944 | static void |
d764a8e6 | 5945 | add_method_to_hash_list (hash *hash_list, tree method) |
e31c7eec | 5946 | { |
d764a8e6 | 5947 | hash hsh; |
e31c7eec | 5948 | |
d764a8e6 | 5949 | if (!(hsh = hash_lookup (hash_list, METHOD_SEL_NAME (method)))) |
e31c7eec | 5950 | { |
d764a8e6 IS |
5951 | /* Install on a global chain. */ |
5952 | hash_enter (hash_list, method); | |
5953 | } | |
5954 | else | |
5955 | { | |
5956 | /* Check types against those; if different, add to a list. */ | |
5957 | attr loop; | |
5958 | int already_there = comp_proto_with_proto (method, hsh->key, 1); | |
5959 | for (loop = hsh->list; !already_there && loop; loop = loop->next) | |
5960 | already_there |= comp_proto_with_proto (method, loop->value, 1); | |
5961 | if (!already_there) | |
5962 | hash_add_attr (hsh, method); | |
e31c7eec | 5963 | } |
6c65299b RS |
5964 | } |
5965 | ||
d764a8e6 IS |
5966 | static tree |
5967 | objc_add_method (tree klass, tree method, int is_class, bool is_optional) | |
38b9c8c3 | 5968 | { |
d764a8e6 | 5969 | tree existing_method = NULL_TREE; |
38b9c8c3 | 5970 | |
d764a8e6 IS |
5971 | /* The first thing we do is look up the method in the list of |
5972 | methods already defined in the interface (or implementation). */ | |
5973 | if (is_class) | |
5974 | existing_method = lookup_method (CLASS_CLS_METHODS (klass), method); | |
5975 | else | |
5976 | existing_method = lookup_method (CLASS_NST_METHODS (klass), method); | |
38b9c8c3 | 5977 | |
d764a8e6 IS |
5978 | /* In the case of protocols, we have a second list of methods to |
5979 | consider, the list of optional ones. */ | |
5980 | if (TREE_CODE (klass) == PROTOCOL_INTERFACE_TYPE) | |
38b9c8c3 | 5981 | { |
d764a8e6 IS |
5982 | /* @required methods are added to the protocol's normal list. |
5983 | @optional methods are added to the protocol's OPTIONAL lists. | |
5984 | Note that adding the methods to the optional lists disables | |
5985 | checking that the methods are implemented by classes | |
5986 | implementing the protocol, since these checks only use the | |
5987 | CLASS_CLS_METHODS and CLASS_NST_METHODS. */ | |
38b9c8c3 | 5988 | |
d764a8e6 IS |
5989 | /* First of all, if the method to add is @optional, and we found |
5990 | it already existing as @required, emit an error. */ | |
5991 | if (is_optional && existing_method) | |
5992 | { | |
5993 | error ("method %<%c%E%> declared %<@optional%> and %<@required%> at the same time", | |
5994 | (is_class ? '+' : '-'), | |
5995 | METHOD_SEL_NAME (existing_method)); | |
5996 | inform (DECL_SOURCE_LOCATION (existing_method), | |
5997 | "previous declaration of %<%c%E%> as %<@required%>", | |
5998 | (is_class ? '+' : '-'), | |
5999 | METHOD_SEL_NAME (existing_method)); | |
38b9c8c3 | 6000 | } |
38b9c8c3 | 6001 | |
d764a8e6 IS |
6002 | /* Now check the list of @optional methods if we didn't find the |
6003 | method in the @required list. */ | |
6004 | if (!existing_method) | |
38b9c8c3 | 6005 | { |
d764a8e6 IS |
6006 | if (is_class) |
6007 | existing_method = lookup_method (PROTOCOL_OPTIONAL_CLS_METHODS (klass), method); | |
6008 | else | |
6009 | existing_method = lookup_method (PROTOCOL_OPTIONAL_NST_METHODS (klass), method); | |
944fb799 | 6010 | |
d764a8e6 | 6011 | if (!is_optional && existing_method) |
38b9c8c3 | 6012 | { |
d764a8e6 IS |
6013 | error ("method %<%c%E%> declared %<@optional%> and %<@required%> at the same time", |
6014 | (is_class ? '+' : '-'), | |
6015 | METHOD_SEL_NAME (existing_method)); | |
6016 | inform (DECL_SOURCE_LOCATION (existing_method), | |
6017 | "previous declaration of %<%c%E%> as %<@optional%>", | |
6018 | (is_class ? '+' : '-'), | |
6019 | METHOD_SEL_NAME (existing_method)); | |
38b9c8c3 ZL |
6020 | } |
6021 | } | |
6022 | } | |
6023 | ||
d764a8e6 IS |
6024 | /* If the method didn't exist already, add it. */ |
6025 | if (!existing_method) | |
6c65299b | 6026 | { |
d764a8e6 | 6027 | if (is_optional) |
e31c7eec | 6028 | { |
d764a8e6 IS |
6029 | if (is_class) |
6030 | { | |
6031 | /* Put the method on the list in reverse order. */ | |
6032 | TREE_CHAIN (method) = PROTOCOL_OPTIONAL_CLS_METHODS (klass); | |
6033 | PROTOCOL_OPTIONAL_CLS_METHODS (klass) = method; | |
6034 | } | |
6035 | else | |
5d0f30f7 | 6036 | { |
d764a8e6 IS |
6037 | TREE_CHAIN (method) = PROTOCOL_OPTIONAL_NST_METHODS (klass); |
6038 | PROTOCOL_OPTIONAL_NST_METHODS (klass) = method; | |
5d0f30f7 | 6039 | } |
e31c7eec | 6040 | } |
d764a8e6 | 6041 | else |
e31c7eec | 6042 | { |
d764a8e6 IS |
6043 | if (is_class) |
6044 | { | |
6045 | DECL_CHAIN (method) = CLASS_CLS_METHODS (klass); | |
6046 | CLASS_CLS_METHODS (klass) = method; | |
6047 | } | |
6048 | else | |
5d0f30f7 | 6049 | { |
d764a8e6 IS |
6050 | DECL_CHAIN (method) = CLASS_NST_METHODS (klass); |
6051 | CLASS_NST_METHODS (klass) = method; | |
5d0f30f7 | 6052 | } |
e31c7eec | 6053 | } |
6c65299b | 6054 | } |
e31c7eec | 6055 | else |
6c65299b | 6056 | { |
d764a8e6 IS |
6057 | /* The method was already defined. Check that the types match |
6058 | for an @interface for a class or category, or for a | |
6059 | @protocol. Give hard errors on methods with identical | |
6060 | selectors but differing argument and/or return types. We do | |
6061 | not do this for @implementations, because C/C++ will do it | |
6062 | for us (i.e., there will be duplicate function definition | |
6063 | errors). */ | |
6064 | if ((TREE_CODE (klass) == CLASS_INTERFACE_TYPE | |
6065 | || TREE_CODE (klass) == CATEGORY_INTERFACE_TYPE | |
6066 | /* Starting with GCC 4.6, we emit the same error for | |
6067 | protocols too. The situation is identical to | |
6068 | @interfaces as there is no possible meaningful reason | |
6069 | for defining the same method with different signatures | |
6070 | in the very same @protocol. If that was allowed, | |
6071 | whenever the protocol is used (both at compile and run | |
6072 | time) there wouldn't be any meaningful way to decide | |
6073 | which of the two method signatures should be used. */ | |
6074 | || TREE_CODE (klass) == PROTOCOL_INTERFACE_TYPE) | |
6075 | && !comp_proto_with_proto (method, existing_method, 1)) | |
6076 | { | |
6077 | error ("duplicate declaration of method %<%c%E%> with conflicting types", | |
6078 | (is_class ? '+' : '-'), | |
6079 | METHOD_SEL_NAME (existing_method)); | |
6080 | inform (DECL_SOURCE_LOCATION (existing_method), | |
6081 | "previous declaration of %<%c%E%>", | |
6082 | (is_class ? '+' : '-'), | |
6083 | METHOD_SEL_NAME (existing_method)); | |
6084 | } | |
6c65299b | 6085 | } |
51900510 | 6086 | |
d764a8e6 IS |
6087 | if (is_class) |
6088 | add_method_to_hash_list (cls_method_hash_list, method); | |
6c65299b RS |
6089 | else |
6090 | { | |
d764a8e6 IS |
6091 | add_method_to_hash_list (nst_method_hash_list, method); |
6092 | ||
6093 | /* Instance methods in root classes (and categories thereof) | |
6094 | may act as class methods as a last resort. We also add | |
6095 | instance methods listed in @protocol declarations to | |
6096 | the class hash table, on the assumption that @protocols | |
6097 | may be adopted by root classes or categories. */ | |
6098 | if (TREE_CODE (klass) == CATEGORY_INTERFACE_TYPE | |
6099 | || TREE_CODE (klass) == CATEGORY_IMPLEMENTATION_TYPE) | |
6100 | klass = lookup_interface (CLASS_NAME (klass)); | |
6101 | ||
6102 | if (TREE_CODE (klass) == PROTOCOL_INTERFACE_TYPE | |
6103 | || !CLASS_SUPER_NAME (klass)) | |
6104 | add_method_to_hash_list (cls_method_hash_list, method); | |
6c65299b | 6105 | } |
51900510 | 6106 | |
d764a8e6 | 6107 | return method; |
6c65299b RS |
6108 | } |
6109 | ||
d764a8e6 IS |
6110 | static tree |
6111 | add_class (tree class_name, tree name) | |
6c65299b | 6112 | { |
d764a8e6 | 6113 | struct interface_tuple **slot; |
6c65299b | 6114 | |
d764a8e6 IS |
6115 | /* Put interfaces on list in reverse order. */ |
6116 | TREE_CHAIN (class_name) = interface_chain; | |
6117 | interface_chain = class_name; | |
6c65299b | 6118 | |
d764a8e6 IS |
6119 | if (interface_htab == NULL) |
6120 | interface_htab = htab_create_ggc (31, hash_interface, eq_interface, NULL); | |
6121 | slot = (struct interface_tuple **) | |
6122 | htab_find_slot_with_hash (interface_htab, name, | |
6123 | IDENTIFIER_HASH_VALUE (name), | |
6124 | INSERT); | |
6125 | if (!*slot) | |
6126 | { | |
6127 | *slot = ggc_alloc_cleared_interface_tuple (); | |
6128 | (*slot)->id = name; | |
6129 | } | |
6130 | (*slot)->class_name = class_name; | |
e31c7eec | 6131 | |
d764a8e6 | 6132 | return interface_chain; |
6c65299b RS |
6133 | } |
6134 | ||
5d0f30f7 | 6135 | static void |
d764a8e6 | 6136 | add_category (tree klass, tree category) |
5d0f30f7 | 6137 | { |
d764a8e6 IS |
6138 | /* Put categories on list in reverse order. */ |
6139 | tree cat = lookup_category (klass, CLASS_SUPER_NAME (category)); | |
6c65299b | 6140 | |
d764a8e6 | 6141 | if (cat) |
e31c7eec | 6142 | { |
d764a8e6 IS |
6143 | warning (0, "duplicate interface declaration for category %<%E(%E)%>", |
6144 | CLASS_NAME (klass), | |
6145 | CLASS_SUPER_NAME (category)); | |
e31c7eec TW |
6146 | } |
6147 | else | |
6148 | { | |
d764a8e6 IS |
6149 | CLASS_CATEGORY_LIST (category) = CLASS_CATEGORY_LIST (klass); |
6150 | CLASS_CATEGORY_LIST (klass) = category; | |
264fa2db | 6151 | } |
6c65299b RS |
6152 | } |
6153 | ||
4597541a NP |
6154 | #ifndef OBJCPLUS |
6155 | /* A flexible array member is a C99 extension where you can use | |
6156 | "type[]" at the end of a struct to mean a variable-length array. | |
6157 | ||
6158 | In Objective-C, instance variables are fundamentally members of a | |
6159 | struct, but the struct can always be extended by subclassing; hence | |
6160 | we need to detect and forbid all instance variables declared using | |
6161 | flexible array members. | |
6162 | ||
6163 | No check for this is needed in Objective-C++, since C++ does not | |
6164 | have flexible array members. */ | |
6165 | ||
6166 | /* Determine whether TYPE is a structure with a flexible array member, | |
6167 | a union containing such a structure (possibly recursively) or an | |
6168 | array of such structures or unions. These are all invalid as | |
6169 | instance variable. */ | |
6170 | static bool | |
6171 | flexible_array_type_p (tree type) | |
6172 | { | |
6173 | tree x; | |
6174 | switch (TREE_CODE (type)) | |
6175 | { | |
6176 | case RECORD_TYPE: | |
6177 | x = TYPE_FIELDS (type); | |
6178 | if (x == NULL_TREE) | |
6179 | return false; | |
6180 | while (DECL_CHAIN (x) != NULL_TREE) | |
6181 | x = DECL_CHAIN (x); | |
6182 | if (TREE_CODE (TREE_TYPE (x)) == ARRAY_TYPE | |
6183 | && TYPE_SIZE (TREE_TYPE (x)) == NULL_TREE | |
6184 | && TYPE_DOMAIN (TREE_TYPE (x)) != NULL_TREE | |
6185 | && TYPE_MAX_VALUE (TYPE_DOMAIN (TREE_TYPE (x))) == NULL_TREE) | |
6186 | return true; | |
6187 | return false; | |
6188 | case UNION_TYPE: | |
6189 | for (x = TYPE_FIELDS (type); x != NULL_TREE; x = DECL_CHAIN (x)) | |
6190 | { | |
6191 | if (flexible_array_type_p (TREE_TYPE (x))) | |
6192 | return true; | |
6193 | } | |
6194 | return false; | |
6195 | /* Note that we also check for arrays of something that uses a flexible array member. */ | |
6196 | case ARRAY_TYPE: | |
6197 | if (flexible_array_type_p (TREE_TYPE (type))) | |
6198 | return true; | |
6199 | return false; | |
6200 | default: | |
6201 | return false; | |
6202 | } | |
6203 | } | |
6204 | #endif | |
6205 | ||
cf3caeaf NP |
6206 | /* Produce a printable version of an ivar name. This is only used |
6207 | inside add_instance_variable. */ | |
6208 | static const char * | |
6209 | printable_ivar_name (tree field_decl) | |
6210 | { | |
6211 | if (DECL_NAME (field_decl)) | |
6212 | return identifier_to_locale (IDENTIFIER_POINTER (DECL_NAME (field_decl))); | |
6213 | else | |
6214 | return _("<unnamed>"); | |
6215 | } | |
6216 | ||
d764a8e6 IS |
6217 | /* Called after parsing each instance variable declaration. Necessary to |
6218 | preserve typedefs and implement public/private... | |
6c65299b | 6219 | |
d764a8e6 | 6220 | VISIBILITY is 1 for public, 0 for protected, and 2 for private. */ |
6c65299b | 6221 | |
d764a8e6 | 6222 | static tree |
944fb799 | 6223 | add_instance_variable (tree klass, objc_ivar_visibility_kind visibility, |
d764a8e6 | 6224 | tree field_decl) |
6c65299b | 6225 | { |
d764a8e6 | 6226 | tree field_type = TREE_TYPE (field_decl); |
6c65299b | 6227 | |
d764a8e6 IS |
6228 | #ifdef OBJCPLUS |
6229 | if (TREE_CODE (field_type) == REFERENCE_TYPE) | |
6230 | { | |
6231 | error ("illegal reference type specified for instance variable %qs", | |
cf3caeaf | 6232 | printable_ivar_name (field_decl)); |
d764a8e6 IS |
6233 | /* Return class as is without adding this ivar. */ |
6234 | return klass; | |
6235 | } | |
6236 | #endif | |
6c65299b | 6237 | |
d764a8e6 IS |
6238 | if (field_type == error_mark_node || !TYPE_SIZE (field_type) |
6239 | || TYPE_SIZE (field_type) == error_mark_node) | |
6240 | /* 'type[0]' is allowed, but 'type[]' is not! */ | |
6c65299b | 6241 | { |
cf3caeaf NP |
6242 | error ("instance variable %qs has unknown size", |
6243 | printable_ivar_name (field_decl)); | |
d764a8e6 IS |
6244 | /* Return class as is without adding this ivar. */ |
6245 | return klass; | |
6246 | } | |
6c65299b | 6247 | |
4597541a NP |
6248 | #ifndef OBJCPLUS |
6249 | /* Also, in C reject a struct with a flexible array member. Ie, | |
6250 | ||
6251 | struct A { int x; int[] y; }; | |
6252 | ||
6253 | @interface X | |
6254 | { | |
6255 | struct A instance_variable; | |
6256 | } | |
6257 | @end | |
6258 | ||
6259 | is not valid because if the class is subclassed, we wouldn't be able | |
6260 | to calculate the offset of the next instance variable. */ | |
6261 | if (flexible_array_type_p (field_type)) | |
6262 | { | |
cf3caeaf NP |
6263 | error ("instance variable %qs uses flexible array member", |
6264 | printable_ivar_name (field_decl)); | |
4597541a | 6265 | /* Return class as is without adding this ivar. */ |
944fb799 | 6266 | return klass; |
4597541a NP |
6267 | } |
6268 | #endif | |
6269 | ||
264fa2db | 6270 | #ifdef OBJCPLUS |
d764a8e6 IS |
6271 | /* Check if the ivar being added has a non-POD C++ type. If so, we will |
6272 | need to either (1) warn the user about it or (2) generate suitable | |
6273 | constructor/destructor call from '- .cxx_construct' or '- .cxx_destruct' | |
6274 | methods (if '-fobjc-call-cxx-cdtors' was specified). */ | |
6275 | if (MAYBE_CLASS_TYPE_P (field_type) | |
6276 | && (TYPE_NEEDS_CONSTRUCTING (field_type) | |
6277 | || TYPE_HAS_NONTRIVIAL_DESTRUCTOR (field_type) | |
6278 | || TYPE_POLYMORPHIC_P (field_type))) | |
6279 | { | |
6280 | tree type_name = OBJC_TYPE_NAME (field_type); | |
51900510 | 6281 | |
d764a8e6 IS |
6282 | if (flag_objc_call_cxx_cdtors) |
6283 | { | |
6284 | /* Since the ObjC runtime will be calling the constructors and | |
6285 | destructors for us, the only thing we can't handle is the lack | |
6286 | of a default constructor. */ | |
6287 | if (TYPE_NEEDS_CONSTRUCTING (field_type) | |
6288 | && !TYPE_HAS_DEFAULT_CONSTRUCTOR (field_type)) | |
6289 | { | |
6290 | warning (0, "type %qE has no default constructor to call", | |
6291 | type_name); | |
6c65299b | 6292 | |
d764a8e6 IS |
6293 | /* If we cannot call a constructor, we should also avoid |
6294 | calling the destructor, for symmetry. */ | |
6295 | if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (field_type)) | |
6296 | warning (0, "destructor for %qE shall not be run either", | |
6297 | type_name); | |
6298 | } | |
6299 | } | |
6300 | else | |
6c65299b | 6301 | { |
d764a8e6 IS |
6302 | static bool warn_cxx_ivars = false; |
6303 | ||
6304 | if (TYPE_POLYMORPHIC_P (field_type)) | |
6c65299b | 6305 | { |
d764a8e6 IS |
6306 | /* Vtable pointers are Real Bad(tm), since Obj-C cannot |
6307 | initialize them. */ | |
6308 | error ("type %qE has virtual member functions", type_name); | |
6309 | error ("illegal aggregate type %qE specified " | |
6310 | "for instance variable %qs", | |
cf3caeaf | 6311 | type_name, printable_ivar_name (field_decl)); |
d764a8e6 IS |
6312 | /* Return class as is without adding this ivar. */ |
6313 | return klass; | |
6c65299b | 6314 | } |
d764a8e6 IS |
6315 | |
6316 | /* User-defined constructors and destructors are not known to Obj-C | |
6317 | and hence will not be called. This may or may not be a problem. */ | |
6318 | if (TYPE_NEEDS_CONSTRUCTING (field_type)) | |
6319 | warning (0, "type %qE has a user-defined constructor", type_name); | |
6320 | if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (field_type)) | |
6321 | warning (0, "type %qE has a user-defined destructor", type_name); | |
6322 | ||
6323 | if (!warn_cxx_ivars) | |
6c65299b | 6324 | { |
d764a8e6 IS |
6325 | warning (0, "C++ constructors and destructors will not " |
6326 | "be invoked for Objective-C fields"); | |
6327 | warn_cxx_ivars = true; | |
6c65299b RS |
6328 | } |
6329 | } | |
6c65299b | 6330 | } |
d764a8e6 | 6331 | #endif |
6c65299b | 6332 | |
d764a8e6 IS |
6333 | /* Overload the public attribute, it is not used for FIELD_DECLs. */ |
6334 | switch (visibility) | |
6335 | { | |
6336 | case OBJC_IVAR_VIS_PROTECTED: | |
6337 | TREE_PUBLIC (field_decl) = 0; | |
6338 | TREE_PRIVATE (field_decl) = 0; | |
6339 | TREE_PROTECTED (field_decl) = 1; | |
6340 | break; | |
6c65299b | 6341 | |
d764a8e6 IS |
6342 | case OBJC_IVAR_VIS_PACKAGE: |
6343 | /* TODO: Implement the package variant. */ | |
6344 | case OBJC_IVAR_VIS_PUBLIC: | |
6345 | TREE_PUBLIC (field_decl) = 1; | |
6346 | TREE_PRIVATE (field_decl) = 0; | |
6347 | TREE_PROTECTED (field_decl) = 0; | |
6348 | break; | |
6c65299b | 6349 | |
d764a8e6 IS |
6350 | case OBJC_IVAR_VIS_PRIVATE: |
6351 | TREE_PUBLIC (field_decl) = 0; | |
6352 | TREE_PRIVATE (field_decl) = 1; | |
6353 | TREE_PROTECTED (field_decl) = 0; | |
6354 | break; | |
6c65299b | 6355 | |
d764a8e6 | 6356 | } |
6c65299b | 6357 | |
d764a8e6 | 6358 | CLASS_RAW_IVARS (klass) = chainon (CLASS_RAW_IVARS (klass), field_decl); |
6c65299b | 6359 | |
d764a8e6 | 6360 | return klass; |
6c65299b RS |
6361 | } |
6362 | ||
d764a8e6 | 6363 | /* True if the ivar is private and we are not in its implementation. */ |
e31c7eec | 6364 | |
d764a8e6 IS |
6365 | static int |
6366 | is_private (tree decl) | |
6c65299b | 6367 | { |
d764a8e6 IS |
6368 | return (TREE_PRIVATE (decl) |
6369 | && ! is_ivar (CLASS_IVARS (implementation_template), | |
6370 | DECL_NAME (decl))); | |
6c65299b RS |
6371 | } |
6372 | ||
5678a5a3 NP |
6373 | /* Searches all the instance variables of 'klass' and of its |
6374 | superclasses for an instance variable whose name (identifier) is | |
6375 | 'ivar_name_ident'. Return the declaration (DECL) of the instance | |
6376 | variable, if found, or NULL_TREE, if not found. */ | |
6377 | static inline tree | |
6378 | ivar_of_class (tree klass, tree ivar_name_ident) | |
6379 | { | |
6380 | /* First, look up the ivar in CLASS_RAW_IVARS. */ | |
6381 | tree decl_chain = CLASS_RAW_IVARS (klass); | |
6382 | ||
6383 | for ( ; decl_chain; decl_chain = DECL_CHAIN (decl_chain)) | |
6384 | if (DECL_NAME (decl_chain) == ivar_name_ident) | |
6385 | return decl_chain; | |
6386 | ||
6387 | /* If not found, search up the class hierarchy. */ | |
6388 | while (CLASS_SUPER_NAME (klass)) | |
6389 | { | |
6390 | klass = lookup_interface (CLASS_SUPER_NAME (klass)); | |
944fb799 | 6391 | |
5678a5a3 | 6392 | decl_chain = CLASS_RAW_IVARS (klass); |
944fb799 | 6393 | |
5678a5a3 NP |
6394 | for ( ; decl_chain; decl_chain = DECL_CHAIN (decl_chain)) |
6395 | if (DECL_NAME (decl_chain) == ivar_name_ident) | |
6396 | return decl_chain; | |
6397 | } | |
6398 | ||
6399 | return NULL_TREE; | |
6400 | } | |
6401 | ||
d764a8e6 | 6402 | /* We have an instance variable reference;, check to see if it is public. */ |
e31c7eec | 6403 | |
d764a8e6 IS |
6404 | int |
6405 | objc_is_public (tree expr, tree identifier) | |
6c65299b | 6406 | { |
d764a8e6 | 6407 | tree basetype, decl; |
6c65299b | 6408 | |
d764a8e6 IS |
6409 | #ifdef OBJCPLUS |
6410 | if (processing_template_decl) | |
6411 | return 1; | |
6412 | #endif | |
6c65299b | 6413 | |
d764a8e6 IS |
6414 | if (TREE_TYPE (expr) == error_mark_node) |
6415 | return 1; | |
6c65299b | 6416 | |
d764a8e6 | 6417 | basetype = TYPE_MAIN_VARIANT (TREE_TYPE (expr)); |
6c65299b | 6418 | |
d764a8e6 IS |
6419 | if (basetype && TREE_CODE (basetype) == RECORD_TYPE) |
6420 | { | |
6421 | if (TYPE_HAS_OBJC_INFO (basetype) && TYPE_OBJC_INTERFACE (basetype)) | |
6422 | { | |
6423 | tree klass = lookup_interface (OBJC_TYPE_NAME (basetype)); | |
6c65299b | 6424 | |
d764a8e6 IS |
6425 | if (!klass) |
6426 | { | |
6427 | error ("cannot find interface declaration for %qE", | |
6428 | OBJC_TYPE_NAME (basetype)); | |
6429 | return 0; | |
6430 | } | |
6c65299b | 6431 | |
5678a5a3 | 6432 | if ((decl = ivar_of_class (klass, identifier))) |
d764a8e6 IS |
6433 | { |
6434 | if (TREE_PUBLIC (decl)) | |
6435 | return 1; | |
6c65299b | 6436 | |
d764a8e6 IS |
6437 | /* Important difference between the Stepstone translator: |
6438 | all instance variables should be public within the context | |
6439 | of the implementation. */ | |
6440 | if (objc_implementation_context | |
6441 | && ((TREE_CODE (objc_implementation_context) | |
6442 | == CLASS_IMPLEMENTATION_TYPE) | |
6443 | || (TREE_CODE (objc_implementation_context) | |
6444 | == CATEGORY_IMPLEMENTATION_TYPE))) | |
6445 | { | |
6446 | tree curtype = TYPE_MAIN_VARIANT | |
6447 | (CLASS_STATIC_TEMPLATE | |
6448 | (implementation_template)); | |
6c65299b | 6449 | |
d764a8e6 IS |
6450 | if (basetype == curtype |
6451 | || DERIVED_FROM_P (basetype, curtype)) | |
6452 | { | |
6453 | int priv = is_private (decl); | |
6c65299b | 6454 | |
d764a8e6 IS |
6455 | if (priv) |
6456 | error ("instance variable %qE is declared private", | |
6457 | DECL_NAME (decl)); | |
6c65299b | 6458 | |
d764a8e6 IS |
6459 | return !priv; |
6460 | } | |
6461 | } | |
6c65299b | 6462 | |
d764a8e6 IS |
6463 | /* The 2.95.2 compiler sometimes allowed C functions to access |
6464 | non-@public ivars. We will let this slide for now... */ | |
6465 | if (!objc_method_context) | |
6466 | { | |
6467 | warning (0, "instance variable %qE is %s; " | |
6468 | "this will be a hard error in the future", | |
6469 | identifier, | |
6470 | TREE_PRIVATE (decl) ? "@private" : "@protected"); | |
6471 | return 1; | |
6472 | } | |
6c65299b | 6473 | |
d764a8e6 IS |
6474 | error ("instance variable %qE is declared %s", |
6475 | identifier, | |
6476 | TREE_PRIVATE (decl) ? "private" : "protected"); | |
6477 | return 0; | |
6478 | } | |
6479 | } | |
6480 | } | |
6c65299b | 6481 | |
d764a8e6 | 6482 | return 1; |
6c65299b | 6483 | } |
d764a8e6 IS |
6484 | \f |
6485 | /* Make sure all methods in CHAIN (a list of method declarations from | |
6486 | an @interface or a @protocol) are in IMPLEMENTATION (the | |
6487 | implementation context). This is used to check for example that | |
6488 | all methods declared in an @interface were implemented in an | |
6489 | @implementation. | |
6c65299b | 6490 | |
d764a8e6 IS |
6491 | Some special methods (property setters/getters) are special and if |
6492 | they are not found in IMPLEMENTATION, we look them up in its | |
6493 | superclasses. */ | |
96e5d745 | 6494 | |
264fa2db | 6495 | static int |
d764a8e6 | 6496 | check_methods (tree chain, tree implementation, int mtype) |
6c65299b | 6497 | { |
d764a8e6 IS |
6498 | int first = 1; |
6499 | tree list; | |
6c65299b | 6500 | |
d764a8e6 IS |
6501 | if (mtype == (int)'+') |
6502 | list = CLASS_CLS_METHODS (implementation); | |
6c65299b | 6503 | else |
d764a8e6 | 6504 | list = CLASS_NST_METHODS (implementation); |
6c65299b | 6505 | |
d764a8e6 | 6506 | while (chain) |
6c65299b | 6507 | { |
d764a8e6 IS |
6508 | /* If the method is associated with a dynamic property, then it |
6509 | is Ok not to have the method implementation, as it will be | |
6510 | generated dynamically at runtime. To decide if the method is | |
6511 | associated with a @dynamic property, we search the list of | |
6512 | @synthesize and @dynamic for this implementation, and look | |
6513 | for any @dynamic property with the same setter or getter name | |
6514 | as this method. */ | |
6515 | tree x; | |
6516 | for (x = IMPL_PROPERTY_DECL (implementation); x; x = TREE_CHAIN (x)) | |
6517 | if (PROPERTY_DYNAMIC (x) | |
6518 | && (PROPERTY_GETTER_NAME (x) == METHOD_SEL_NAME (chain) | |
6519 | || PROPERTY_SETTER_NAME (x) == METHOD_SEL_NAME (chain))) | |
6520 | break; | |
944fb799 | 6521 | |
d764a8e6 IS |
6522 | if (x != NULL_TREE) |
6523 | { | |
6524 | chain = TREE_CHAIN (chain); /* next method... */ | |
6525 | continue; | |
6526 | } | |
6c65299b | 6527 | |
d764a8e6 IS |
6528 | if (!lookup_method (list, chain)) |
6529 | { | |
6530 | /* If the method is a property setter/getter, we'll still | |
6531 | allow it to be missing if it is implemented by | |
6532 | 'interface' or any of its superclasses. */ | |
6533 | tree property = METHOD_PROPERTY_CONTEXT (chain); | |
6534 | if (property) | |
6535 | { | |
6536 | /* Note that since this is a property getter/setter, it | |
6537 | is obviously an instance method. */ | |
6538 | tree interface = NULL_TREE; | |
6c65299b | 6539 | |
d764a8e6 IS |
6540 | /* For a category, first check the main class |
6541 | @interface. */ | |
6542 | if (TREE_CODE (implementation) == CATEGORY_IMPLEMENTATION_TYPE) | |
6543 | { | |
6544 | interface = lookup_interface (CLASS_NAME (implementation)); | |
30c0e2df | 6545 | |
d764a8e6 IS |
6546 | /* If the method is found in the main class, it's Ok. */ |
6547 | if (lookup_method (CLASS_NST_METHODS (interface), chain)) | |
6548 | { | |
6549 | chain = DECL_CHAIN (chain); | |
944fb799 | 6550 | continue; |
d764a8e6 | 6551 | } |
6c65299b | 6552 | |
d764a8e6 IS |
6553 | /* Else, get the superclass. */ |
6554 | if (CLASS_SUPER_NAME (interface)) | |
6555 | interface = lookup_interface (CLASS_SUPER_NAME (interface)); | |
6556 | else | |
6557 | interface = NULL_TREE; | |
6558 | } | |
51a56a7d | 6559 | |
d764a8e6 IS |
6560 | /* Get the superclass for classes. */ |
6561 | if (TREE_CODE (implementation) == CLASS_IMPLEMENTATION_TYPE) | |
6562 | { | |
6563 | if (CLASS_SUPER_NAME (implementation)) | |
6564 | interface = lookup_interface (CLASS_SUPER_NAME (implementation)); | |
6565 | else | |
6566 | interface = NULL_TREE; | |
6567 | } | |
6c65299b | 6568 | |
d764a8e6 IS |
6569 | /* Now, interface is the superclass, if any; go check it. */ |
6570 | if (interface) | |
6571 | { | |
6572 | if (lookup_method_static (interface, chain, 0)) | |
6573 | { | |
6574 | chain = DECL_CHAIN (chain); | |
6575 | continue; | |
6576 | } | |
6577 | } | |
6578 | /* Else, fall through - warn. */ | |
6579 | } | |
6580 | if (first) | |
6581 | { | |
6582 | switch (TREE_CODE (implementation)) | |
6583 | { | |
6584 | case CLASS_IMPLEMENTATION_TYPE: | |
6585 | warning (0, "incomplete implementation of class %qE", | |
6586 | CLASS_NAME (implementation)); | |
6587 | break; | |
6588 | case CATEGORY_IMPLEMENTATION_TYPE: | |
6589 | warning (0, "incomplete implementation of category %qE", | |
6590 | CLASS_SUPER_NAME (implementation)); | |
6591 | break; | |
6592 | default: | |
6593 | gcc_unreachable (); | |
6594 | } | |
6595 | first = 0; | |
6596 | } | |
30c0e2df | 6597 | |
d764a8e6 IS |
6598 | warning (0, "method definition for %<%c%E%> not found", |
6599 | mtype, METHOD_SEL_NAME (chain)); | |
6600 | } | |
6c65299b | 6601 | |
d764a8e6 | 6602 | chain = DECL_CHAIN (chain); |
6c65299b | 6603 | } |
6c65299b | 6604 | |
d764a8e6 | 6605 | return first; |
6c65299b RS |
6606 | } |
6607 | ||
d764a8e6 | 6608 | /* Check if KLASS, or its superclasses, explicitly conforms to PROTOCOL. */ |
e31c7eec | 6609 | |
d764a8e6 IS |
6610 | static int |
6611 | conforms_to_protocol (tree klass, tree protocol) | |
6c65299b | 6612 | { |
d764a8e6 IS |
6613 | if (TREE_CODE (protocol) == PROTOCOL_INTERFACE_TYPE) |
6614 | { | |
6615 | tree p = CLASS_PROTOCOL_LIST (klass); | |
6616 | while (p && TREE_VALUE (p) != protocol) | |
6617 | p = TREE_CHAIN (p); | |
6c65299b | 6618 | |
d764a8e6 IS |
6619 | if (!p) |
6620 | { | |
6621 | tree super = (CLASS_SUPER_NAME (klass) | |
6622 | ? lookup_interface (CLASS_SUPER_NAME (klass)) | |
6623 | : NULL_TREE); | |
6624 | int tmp = super ? conforms_to_protocol (super, protocol) : 0; | |
6625 | if (!tmp) | |
6626 | return 0; | |
6627 | } | |
6628 | } | |
6c65299b | 6629 | |
d764a8e6 | 6630 | return 1; |
6c65299b RS |
6631 | } |
6632 | ||
d764a8e6 IS |
6633 | /* Make sure all methods in CHAIN are accessible as MTYPE methods in |
6634 | CONTEXT. This is one of two mechanisms to check protocol integrity. */ | |
6c65299b | 6635 | |
d764a8e6 IS |
6636 | static int |
6637 | check_methods_accessible (tree chain, tree context, int mtype) | |
0d446150 | 6638 | { |
d764a8e6 IS |
6639 | int first = 1; |
6640 | tree list; | |
6641 | tree base_context = context; | |
0d446150 | 6642 | |
d764a8e6 | 6643 | while (chain) |
0d446150 | 6644 | { |
d764a8e6 IS |
6645 | /* If the method is associated with a dynamic property, then it |
6646 | is Ok not to have the method implementation, as it will be | |
6647 | generated dynamically at runtime. Search for any @dynamic | |
6648 | property with the same setter or getter name as this | |
6649 | method. TODO: Use a hashtable lookup. */ | |
6650 | tree x; | |
6651 | for (x = IMPL_PROPERTY_DECL (base_context); x; x = TREE_CHAIN (x)) | |
6652 | if (PROPERTY_DYNAMIC (x) | |
6653 | && (PROPERTY_GETTER_NAME (x) == METHOD_SEL_NAME (chain) | |
6654 | || PROPERTY_SETTER_NAME (x) == METHOD_SEL_NAME (chain))) | |
6655 | break; | |
944fb799 | 6656 | |
d764a8e6 | 6657 | if (x != NULL_TREE) |
0d446150 | 6658 | { |
d764a8e6 IS |
6659 | chain = TREE_CHAIN (chain); /* next method... */ |
6660 | continue; | |
944fb799 | 6661 | } |
8dafba3c | 6662 | |
d764a8e6 IS |
6663 | context = base_context; |
6664 | while (context) | |
0d446150 | 6665 | { |
d764a8e6 IS |
6666 | if (mtype == '+') |
6667 | list = CLASS_CLS_METHODS (context); | |
6668 | else | |
6669 | list = CLASS_NST_METHODS (context); | |
e31c7eec | 6670 | |
d764a8e6 IS |
6671 | if (lookup_method (list, chain)) |
6672 | break; | |
6c65299b | 6673 | |
d764a8e6 IS |
6674 | switch (TREE_CODE (context)) |
6675 | { | |
6676 | case CLASS_IMPLEMENTATION_TYPE: | |
6677 | case CLASS_INTERFACE_TYPE: | |
6678 | context = (CLASS_SUPER_NAME (context) | |
6679 | ? lookup_interface (CLASS_SUPER_NAME (context)) | |
6680 | : NULL_TREE); | |
6681 | break; | |
6682 | case CATEGORY_IMPLEMENTATION_TYPE: | |
6683 | case CATEGORY_INTERFACE_TYPE: | |
6684 | context = (CLASS_NAME (context) | |
6685 | ? lookup_interface (CLASS_NAME (context)) | |
6686 | : NULL_TREE); | |
6687 | break; | |
6688 | default: | |
6689 | gcc_unreachable (); | |
6690 | } | |
6691 | } | |
30c0e2df | 6692 | |
d764a8e6 IS |
6693 | if (context == NULL_TREE) |
6694 | { | |
6695 | if (first) | |
6696 | { | |
6697 | switch (TREE_CODE (objc_implementation_context)) | |
6698 | { | |
6699 | case CLASS_IMPLEMENTATION_TYPE: | |
6700 | warning (0, "incomplete implementation of class %qE", | |
6701 | CLASS_NAME (objc_implementation_context)); | |
6702 | break; | |
6703 | case CATEGORY_IMPLEMENTATION_TYPE: | |
6704 | warning (0, "incomplete implementation of category %qE", | |
6705 | CLASS_SUPER_NAME (objc_implementation_context)); | |
6706 | break; | |
6707 | default: | |
6708 | gcc_unreachable (); | |
6709 | } | |
6710 | first = 0; | |
6711 | } | |
6712 | warning (0, "method definition for %<%c%E%> not found", | |
6713 | mtype, METHOD_SEL_NAME (chain)); | |
6714 | } | |
6c65299b | 6715 | |
d764a8e6 | 6716 | chain = TREE_CHAIN (chain); /* next method... */ |
6c65299b | 6717 | } |
d764a8e6 | 6718 | return first; |
e31c7eec TW |
6719 | } |
6720 | ||
d764a8e6 IS |
6721 | /* Check whether the current interface (accessible via |
6722 | 'objc_implementation_context') actually implements protocol P, along | |
6723 | with any protocols that P inherits. */ | |
e31c7eec | 6724 | |
d764a8e6 IS |
6725 | static void |
6726 | check_protocol (tree p, const char *type, tree name) | |
6727 | { | |
6728 | if (TREE_CODE (p) == PROTOCOL_INTERFACE_TYPE) | |
50ea5861 | 6729 | { |
d764a8e6 | 6730 | int f1, f2; |
e31c7eec | 6731 | |
d764a8e6 IS |
6732 | /* Ensure that all protocols have bodies! */ |
6733 | if (warn_protocol) | |
6734 | { | |
6735 | f1 = check_methods (PROTOCOL_CLS_METHODS (p), | |
6736 | objc_implementation_context, | |
6737 | '+'); | |
6738 | f2 = check_methods (PROTOCOL_NST_METHODS (p), | |
6739 | objc_implementation_context, | |
6740 | '-'); | |
6741 | } | |
6742 | else | |
6743 | { | |
6744 | f1 = check_methods_accessible (PROTOCOL_CLS_METHODS (p), | |
6745 | objc_implementation_context, | |
6746 | '+'); | |
6747 | f2 = check_methods_accessible (PROTOCOL_NST_METHODS (p), | |
6748 | objc_implementation_context, | |
6749 | '-'); | |
6750 | } | |
e31c7eec | 6751 | |
d764a8e6 IS |
6752 | if (!f1 || !f2) |
6753 | warning (0, "%s %qE does not fully implement the %qE protocol", | |
6754 | type, name, PROTOCOL_NAME (p)); | |
6755 | } | |
e31c7eec | 6756 | |
d764a8e6 IS |
6757 | /* Check protocols recursively. */ |
6758 | if (PROTOCOL_LIST (p)) | |
e31c7eec | 6759 | { |
d764a8e6 IS |
6760 | tree subs = PROTOCOL_LIST (p); |
6761 | tree super_class = | |
6762 | lookup_interface (CLASS_SUPER_NAME (implementation_template)); | |
e31c7eec | 6763 | |
d764a8e6 | 6764 | while (subs) |
e31c7eec | 6765 | { |
d764a8e6 IS |
6766 | tree sub = TREE_VALUE (subs); |
6767 | ||
6768 | /* If the superclass does not conform to the protocols | |
6769 | inherited by P, then we must! */ | |
6770 | if (!super_class || !conforms_to_protocol (super_class, sub)) | |
6771 | check_protocol (sub, type, name); | |
6772 | subs = TREE_CHAIN (subs); | |
e31c7eec TW |
6773 | } |
6774 | } | |
d764a8e6 | 6775 | } |
e31c7eec | 6776 | |
d764a8e6 IS |
6777 | /* Check whether the current interface (accessible via |
6778 | 'objc_implementation_context') actually implements the protocols listed | |
6779 | in PROTO_LIST. */ | |
e31c7eec | 6780 | |
d764a8e6 IS |
6781 | static void |
6782 | check_protocols (tree proto_list, const char *type, tree name) | |
6783 | { | |
6784 | for ( ; proto_list; proto_list = TREE_CHAIN (proto_list)) | |
50ea5861 | 6785 | { |
d764a8e6 | 6786 | tree p = TREE_VALUE (proto_list); |
e31c7eec | 6787 | |
d764a8e6 IS |
6788 | check_protocol (p, type, name); |
6789 | } | |
6c65299b | 6790 | } |
d764a8e6 IS |
6791 | \f |
6792 | /* Make sure that the class CLASS_NAME is defined CODE says which kind | |
6793 | of thing CLASS_NAME ought to be. It can be CLASS_INTERFACE_TYPE, | |
6794 | CLASS_IMPLEMENTATION_TYPE, CATEGORY_INTERFACE_TYPE, or | |
6795 | CATEGORY_IMPLEMENTATION_TYPE. For a CATEGORY_INTERFACE_TYPE, | |
6796 | SUPER_NAME is the name of the category. For a class extension, | |
6797 | CODE is CATEGORY_INTERFACE_TYPE and SUPER_NAME is NULL_TREE. */ | |
6c65299b | 6798 | static tree |
d764a8e6 IS |
6799 | start_class (enum tree_code code, tree class_name, tree super_name, |
6800 | tree protocol_list, tree attributes) | |
6c65299b | 6801 | { |
d764a8e6 IS |
6802 | tree klass = NULL_TREE; |
6803 | tree decl; | |
6c65299b | 6804 | |
d764a8e6 IS |
6805 | #ifdef OBJCPLUS |
6806 | if (current_namespace != global_namespace) | |
6c65299b | 6807 | { |
d764a8e6 | 6808 | error ("Objective-C declarations may only appear in global scope"); |
6c65299b | 6809 | } |
d764a8e6 IS |
6810 | #endif /* OBJCPLUS */ |
6811 | ||
6812 | if (objc_implementation_context) | |
6c65299b | 6813 | { |
d764a8e6 IS |
6814 | warning (0, "%<@end%> missing in implementation context"); |
6815 | finish_class (objc_implementation_context); | |
6816 | objc_ivar_chain = NULL_TREE; | |
6817 | objc_implementation_context = NULL_TREE; | |
6c65299b | 6818 | } |
e31c7eec | 6819 | |
d764a8e6 IS |
6820 | /* If this is a class extension, we'll be "reopening" the existing |
6821 | CLASS_INTERFACE_TYPE, so in that case there is no need to create | |
6822 | a new node. */ | |
6823 | if (code != CATEGORY_INTERFACE_TYPE || super_name != NULL_TREE) | |
6408ef33 | 6824 | { |
d764a8e6 IS |
6825 | klass = make_node (code); |
6826 | TYPE_LANG_SLOT_1 (klass) = make_tree_vec (CLASS_LANG_SLOT_ELTS); | |
6827 | } | |
6c65299b | 6828 | |
d764a8e6 IS |
6829 | /* Check for existence of the super class, if one was specified. Note |
6830 | that we must have seen an @interface, not just a @class. If we | |
6831 | are looking at a @compatibility_alias, traverse it first. */ | |
6832 | if ((code == CLASS_INTERFACE_TYPE || code == CLASS_IMPLEMENTATION_TYPE) | |
6833 | && super_name) | |
6c65299b | 6834 | { |
d764a8e6 IS |
6835 | tree super = objc_is_class_name (super_name); |
6836 | tree super_interface = NULL_TREE; | |
6837 | ||
6838 | if (super) | |
6839 | super_interface = lookup_interface (super); | |
944fb799 | 6840 | |
d764a8e6 IS |
6841 | if (!super_interface) |
6842 | { | |
6843 | error ("cannot find interface declaration for %qE, superclass of %qE", | |
6844 | super ? super : super_name, | |
6845 | class_name); | |
6846 | super_name = NULL_TREE; | |
6847 | } | |
6848 | else | |
6849 | { | |
6850 | if (TREE_DEPRECATED (super_interface)) | |
944fb799 | 6851 | warning (OPT_Wdeprecated_declarations, "class %qE is deprecated", |
d764a8e6 IS |
6852 | super); |
6853 | super_name = super; | |
6854 | } | |
6c65299b RS |
6855 | } |
6856 | ||
d764a8e6 | 6857 | if (code != CATEGORY_INTERFACE_TYPE || super_name != NULL_TREE) |
6c65299b | 6858 | { |
d764a8e6 IS |
6859 | CLASS_NAME (klass) = class_name; |
6860 | CLASS_SUPER_NAME (klass) = super_name; | |
6861 | CLASS_CLS_METHODS (klass) = NULL_TREE; | |
6c65299b RS |
6862 | } |
6863 | ||
d764a8e6 IS |
6864 | if (! objc_is_class_name (class_name) |
6865 | && (decl = lookup_name (class_name))) | |
e31c7eec | 6866 | { |
d764a8e6 IS |
6867 | error ("%qE redeclared as different kind of symbol", |
6868 | class_name); | |
6869 | error ("previous declaration of %q+D", | |
6870 | decl); | |
e31c7eec TW |
6871 | } |
6872 | ||
d764a8e6 | 6873 | switch (code) |
6408ef33 | 6874 | { |
d764a8e6 IS |
6875 | case CLASS_IMPLEMENTATION_TYPE: |
6876 | { | |
6877 | tree chain; | |
944fb799 | 6878 | |
d764a8e6 IS |
6879 | for (chain = implemented_classes; chain; chain = TREE_CHAIN (chain)) |
6880 | if (TREE_VALUE (chain) == class_name) | |
6881 | { | |
6882 | error ("reimplementation of class %qE", | |
6883 | class_name); | |
6884 | /* TODO: error message saying where it was previously | |
6885 | implemented. */ | |
6886 | break; | |
6887 | } | |
6888 | if (chain == NULL_TREE) | |
6889 | implemented_classes = tree_cons (NULL_TREE, class_name, | |
6890 | implemented_classes); | |
6891 | } | |
6c65299b | 6892 | |
d764a8e6 IS |
6893 | /* Reset for multiple classes per file. */ |
6894 | method_slot = 0; | |
264fa2db | 6895 | |
d764a8e6 | 6896 | objc_implementation_context = klass; |
d8bb17c8 | 6897 | |
d764a8e6 | 6898 | /* Lookup the interface for this implementation. */ |
6c65299b | 6899 | |
d764a8e6 IS |
6900 | if (!(implementation_template = lookup_interface (class_name))) |
6901 | { | |
6902 | warning (0, "cannot find interface declaration for %qE", | |
6903 | class_name); | |
6904 | add_class (implementation_template = objc_implementation_context, | |
6905 | class_name); | |
6906 | } | |
e31c7eec | 6907 | |
d764a8e6 IS |
6908 | /* If a super class has been specified in the implementation, |
6909 | insure it conforms to the one specified in the interface. */ | |
6c65299b | 6910 | |
d764a8e6 IS |
6911 | if (super_name |
6912 | && (super_name != CLASS_SUPER_NAME (implementation_template))) | |
6c65299b | 6913 | { |
d764a8e6 IS |
6914 | tree previous_name = CLASS_SUPER_NAME (implementation_template); |
6915 | error ("conflicting super class name %qE", | |
6916 | super_name); | |
6917 | if (previous_name) | |
6918 | error ("previous declaration of %qE", previous_name); | |
6c65299b | 6919 | else |
d764a8e6 | 6920 | error ("previous declaration"); |
6c65299b | 6921 | } |
6c65299b | 6922 | |
d764a8e6 IS |
6923 | else if (! super_name) |
6924 | { | |
6925 | CLASS_SUPER_NAME (objc_implementation_context) | |
6926 | = CLASS_SUPER_NAME (implementation_template); | |
6927 | } | |
6928 | break; | |
6c65299b | 6929 | |
d764a8e6 IS |
6930 | case CLASS_INTERFACE_TYPE: |
6931 | if (lookup_interface (class_name)) | |
6932 | #ifdef OBJCPLUS | |
6933 | error ("duplicate interface declaration for class %qE", class_name); | |
6934 | #else | |
6935 | warning (0, "duplicate interface declaration for class %qE", class_name); | |
6936 | #endif | |
6937 | else | |
6938 | add_class (klass, class_name); | |
944fb799 | 6939 | |
d764a8e6 IS |
6940 | if (protocol_list) |
6941 | CLASS_PROTOCOL_LIST (klass) | |
6942 | = lookup_and_install_protocols (protocol_list, /* definition_required */ true); | |
e31c7eec | 6943 | |
d764a8e6 IS |
6944 | if (attributes) |
6945 | { | |
6946 | tree attribute; | |
6947 | for (attribute = attributes; attribute; attribute = TREE_CHAIN (attribute)) | |
6948 | { | |
6949 | tree name = TREE_PURPOSE (attribute); | |
944fb799 | 6950 | |
d4c433f9 | 6951 | /* TODO: Document what the objc_exception attribute is/does. */ |
d764a8e6 IS |
6952 | /* We handle the 'deprecated' and (undocumented) 'objc_exception' |
6953 | attributes. */ | |
6954 | if (is_attribute_p ("deprecated", name)) | |
6955 | TREE_DEPRECATED (klass) = 1; | |
6956 | else if (is_attribute_p ("objc_exception", name)) | |
6957 | CLASS_HAS_EXCEPTION_ATTR (klass) = 1; | |
6958 | else | |
6959 | /* Warn about and ignore all others for now, but store them. */ | |
6960 | warning (OPT_Wattributes, "%qE attribute directive ignored", name); | |
6961 | } | |
6962 | TYPE_ATTRIBUTES (klass) = attributes; | |
6963 | } | |
944fb799 | 6964 | break; |
6c65299b | 6965 | |
d764a8e6 IS |
6966 | case CATEGORY_INTERFACE_TYPE: |
6967 | { | |
6968 | tree class_category_is_assoc_with; | |
944fb799 | 6969 | |
d764a8e6 IS |
6970 | /* For a category, class_name is really the name of the class that |
6971 | the following set of methods will be associated with. We must | |
6972 | find the interface so that can derive the objects template. */ | |
6973 | if (!(class_category_is_assoc_with = lookup_interface (class_name))) | |
6974 | { | |
6975 | error ("cannot find interface declaration for %qE", | |
6976 | class_name); | |
6977 | exit (FATAL_EXIT_CODE); | |
6978 | } | |
6979 | else | |
6980 | { | |
6981 | if (TREE_DEPRECATED (class_category_is_assoc_with)) | |
944fb799 | 6982 | warning (OPT_Wdeprecated_declarations, "class %qE is deprecated", |
d764a8e6 | 6983 | class_name); |
6c65299b | 6984 | |
d764a8e6 IS |
6985 | if (super_name == NULL_TREE) |
6986 | { | |
6987 | /* This is a class extension. Get the original | |
6988 | interface, and continue working on it. */ | |
6989 | objc_in_class_extension = true; | |
6990 | klass = class_category_is_assoc_with; | |
6c65299b | 6991 | |
d764a8e6 IS |
6992 | if (protocol_list) |
6993 | { | |
6994 | /* Append protocols to the original protocol | |
6995 | list. */ | |
6996 | CLASS_PROTOCOL_LIST (klass) | |
6997 | = chainon (CLASS_PROTOCOL_LIST (klass), | |
6998 | lookup_and_install_protocols | |
6999 | (protocol_list, | |
7000 | /* definition_required */ true)); | |
7001 | } | |
7002 | } | |
7003 | else | |
7004 | { | |
7005 | add_category (class_category_is_assoc_with, klass); | |
944fb799 | 7006 | |
d764a8e6 IS |
7007 | if (protocol_list) |
7008 | CLASS_PROTOCOL_LIST (klass) | |
7009 | = lookup_and_install_protocols | |
7010 | (protocol_list, /* definition_required */ true); | |
7011 | } | |
7012 | } | |
7013 | } | |
7014 | break; | |
944fb799 | 7015 | |
d764a8e6 IS |
7016 | case CATEGORY_IMPLEMENTATION_TYPE: |
7017 | /* Reset for multiple classes per file. */ | |
7018 | method_slot = 0; | |
6c65299b | 7019 | |
d764a8e6 | 7020 | objc_implementation_context = klass; |
6c65299b | 7021 | |
d764a8e6 IS |
7022 | /* For a category, class_name is really the name of the class that |
7023 | the following set of methods will be associated with. We must | |
7024 | find the interface so that can derive the objects template. */ | |
6c65299b | 7025 | |
d764a8e6 IS |
7026 | if (!(implementation_template = lookup_interface (class_name))) |
7027 | { | |
7028 | error ("cannot find interface declaration for %qE", | |
7029 | class_name); | |
7030 | exit (FATAL_EXIT_CODE); | |
7031 | } | |
7032 | break; | |
7033 | default: | |
7034 | gcc_unreachable (); | |
7035 | } | |
7036 | return klass; | |
6c65299b RS |
7037 | } |
7038 | ||
d764a8e6 IS |
7039 | static tree |
7040 | continue_class (tree klass) | |
6c65299b | 7041 | { |
d764a8e6 | 7042 | switch (TREE_CODE (klass)) |
6e3f0724 | 7043 | { |
50ea5861 | 7044 | case CLASS_IMPLEMENTATION_TYPE: |
50ea5861 | 7045 | case CATEGORY_IMPLEMENTATION_TYPE: |
50ea5861 | 7046 | { |
d764a8e6 IS |
7047 | struct imp_entry *imp_entry; |
7048 | ||
7049 | /* Check consistency of the instance variables. */ | |
7050 | ||
7051 | if (CLASS_RAW_IVARS (klass)) | |
7052 | check_ivars (implementation_template, klass); | |
944fb799 | 7053 | |
d764a8e6 IS |
7054 | /* code generation */ |
7055 | #ifdef OBJCPLUS | |
7056 | push_lang_context (lang_name_c); | |
7057 | #endif | |
7058 | build_private_template (implementation_template); | |
7059 | uprivate_record = CLASS_STATIC_TEMPLATE (implementation_template); | |
7060 | objc_instance_type = build_pointer_type (uprivate_record); | |
7061 | ||
7062 | imp_entry = ggc_alloc_imp_entry (); | |
7063 | ||
7064 | imp_entry->next = imp_list; | |
7065 | imp_entry->imp_context = klass; | |
7066 | imp_entry->imp_template = implementation_template; | |
7067 | ucls_super_ref = uucls_super_ref = NULL; | |
7068 | if (TREE_CODE (klass) == CLASS_IMPLEMENTATION_TYPE) | |
7069 | { | |
7070 | imp_entry->class_decl = (*runtime.class_decl) (klass); | |
7071 | imp_entry->meta_decl = (*runtime.metaclass_decl) (klass); | |
7072 | } | |
7073 | else | |
7074 | { | |
7075 | imp_entry->class_decl = (*runtime.category_decl) (klass); | |
7076 | imp_entry->meta_decl = NULL; | |
7077 | } | |
7078 | imp_entry->has_cxx_cdtors = 0; | |
7079 | ||
7080 | /* Append to front and increment count. */ | |
7081 | imp_list = imp_entry; | |
7082 | if (TREE_CODE (klass) == CLASS_IMPLEMENTATION_TYPE) | |
7083 | imp_count++; | |
7084 | else | |
7085 | cat_count++; | |
7086 | #ifdef OBJCPLUS | |
7087 | pop_lang_context (); | |
7088 | #endif /* OBJCPLUS */ | |
944fb799 | 7089 | |
d764a8e6 | 7090 | return get_class_ivars (implementation_template, true); |
50ea5861 | 7091 | break; |
d764a8e6 IS |
7092 | } |
7093 | case CLASS_INTERFACE_TYPE: | |
50ea5861 | 7094 | { |
d764a8e6 IS |
7095 | if (objc_in_class_extension) |
7096 | return NULL_TREE; | |
7097 | #ifdef OBJCPLUS | |
7098 | push_lang_context (lang_name_c); | |
7099 | #endif /* OBJCPLUS */ | |
7100 | objc_collecting_ivars = 1; | |
7101 | build_private_template (klass); | |
7102 | objc_collecting_ivars = 0; | |
7103 | #ifdef OBJCPLUS | |
7104 | pop_lang_context (); | |
7105 | #endif /* OBJCPLUS */ | |
7106 | return NULL_TREE; | |
50ea5861 NP |
7107 | break; |
7108 | } | |
7109 | default: | |
d764a8e6 | 7110 | return error_mark_node; |
6e3f0724 | 7111 | } |
e31c7eec TW |
7112 | } |
7113 | ||
d764a8e6 IS |
7114 | /* This routine builds name of the setter synthesized function. */ |
7115 | static char * | |
7116 | objc_build_property_setter_name (tree ident) | |
e31c7eec | 7117 | { |
d764a8e6 IS |
7118 | /* TODO: Use alloca to allocate buffer of appropriate size. */ |
7119 | static char string[BUFSIZE]; | |
7120 | sprintf (string, "set%s:", IDENTIFIER_POINTER (ident)); | |
7121 | string[3] = TOUPPER (string[3]); | |
7122 | return string; | |
e31c7eec TW |
7123 | } |
7124 | ||
d764a8e6 IS |
7125 | /* This routine prepares the declarations of the property accessor |
7126 | helper functions (objc_getProperty(), etc) that are used when | |
944fb799 MS |
7127 | @synthesize is used. |
7128 | ||
7129 | runtime-specific routines are built in the respective runtime | |
d764a8e6 | 7130 | initialize functions. */ |
944fb799 | 7131 | static void |
d764a8e6 IS |
7132 | build_common_objc_property_accessor_helpers (void) |
7133 | { | |
7134 | tree type; | |
011d50d9 | 7135 | |
d764a8e6 IS |
7136 | /* Declare the following function: |
7137 | id | |
944fb799 | 7138 | objc_getProperty (id self, SEL _cmd, |
d764a8e6 IS |
7139 | ptrdiff_t offset, BOOL is_atomic); */ |
7140 | type = build_function_type_list (objc_object_type, | |
7141 | objc_object_type, | |
7142 | objc_selector_type, | |
7143 | ptrdiff_type_node, | |
7144 | boolean_type_node, | |
7145 | NULL_TREE); | |
7146 | objc_getProperty_decl = add_builtin_function ("objc_getProperty", | |
7147 | type, 0, NOT_BUILT_IN, | |
7148 | NULL, NULL_TREE); | |
7149 | TREE_NOTHROW (objc_getProperty_decl) = 0; | |
944fb799 | 7150 | |
d764a8e6 IS |
7151 | /* Declare the following function: |
7152 | void | |
944fb799 MS |
7153 | objc_setProperty (id self, SEL _cmd, |
7154 | ptrdiff_t offset, id new_value, | |
d764a8e6 IS |
7155 | BOOL is_atomic, BOOL should_copy); */ |
7156 | type = build_function_type_list (void_type_node, | |
7157 | objc_object_type, | |
7158 | objc_selector_type, | |
7159 | ptrdiff_type_node, | |
7160 | objc_object_type, | |
7161 | boolean_type_node, | |
7162 | boolean_type_node, | |
7163 | NULL_TREE); | |
7164 | objc_setProperty_decl = add_builtin_function ("objc_setProperty", | |
7165 | type, 0, NOT_BUILT_IN, | |
7166 | NULL, NULL_TREE); | |
7167 | TREE_NOTHROW (objc_setProperty_decl) = 0; | |
6c65299b RS |
7168 | } |
7169 | ||
d764a8e6 | 7170 | /* This looks up an ivar in a class (including superclasses). */ |
6c65299b | 7171 | static tree |
d764a8e6 | 7172 | lookup_ivar (tree interface, tree instance_variable_name) |
6c65299b | 7173 | { |
d764a8e6 | 7174 | while (interface) |
6c65299b | 7175 | { |
d764a8e6 | 7176 | tree decl_chain; |
944fb799 | 7177 | |
d764a8e6 IS |
7178 | for (decl_chain = CLASS_IVARS (interface); decl_chain; decl_chain = DECL_CHAIN (decl_chain)) |
7179 | if (DECL_NAME (decl_chain) == instance_variable_name) | |
7180 | return decl_chain; | |
944fb799 | 7181 | |
d764a8e6 IS |
7182 | /* Not found. Search superclass if any. */ |
7183 | if (CLASS_SUPER_NAME (interface)) | |
7184 | interface = lookup_interface (CLASS_SUPER_NAME (interface)); | |
6c65299b | 7185 | } |
944fb799 | 7186 | |
d764a8e6 | 7187 | return NULL_TREE; |
6c65299b RS |
7188 | } |
7189 | ||
d764a8e6 IS |
7190 | /* This routine synthesizes a 'getter' method. This is only called |
7191 | for @synthesize properties. */ | |
7192 | static void | |
7193 | objc_synthesize_getter (tree klass, tree class_methods ATTRIBUTE_UNUSED, tree property) | |
6c65299b | 7194 | { |
d764a8e6 IS |
7195 | location_t location = DECL_SOURCE_LOCATION (property); |
7196 | tree fn, decl; | |
7197 | tree body; | |
7198 | tree ret_val; | |
6c65299b | 7199 | |
d764a8e6 IS |
7200 | /* If user has implemented a getter with same name then do nothing. */ |
7201 | if (lookup_method (CLASS_NST_METHODS (objc_implementation_context), | |
7202 | PROPERTY_GETTER_NAME (property))) | |
7203 | return; | |
6c65299b | 7204 | |
d764a8e6 IS |
7205 | /* Find declaration of the property getter in the interface (or |
7206 | superclass, or protocol). There must be one. */ | |
7207 | decl = lookup_method_static (klass, PROPERTY_GETTER_NAME (property), 0); | |
6c65299b | 7208 | |
d764a8e6 IS |
7209 | /* If one not declared in the interface, this condition has already |
7210 | been reported as user error (because property was not declared in | |
7211 | the interface). */ | |
7212 | if (!decl) | |
7213 | return; | |
6c65299b | 7214 | |
d764a8e6 IS |
7215 | /* Adapt the 'decl'. Use the source location of the @synthesize |
7216 | statement for error messages. */ | |
7217 | decl = copy_node (decl); | |
7218 | DECL_SOURCE_LOCATION (decl) = location; | |
6c65299b | 7219 | |
a04a722b JM |
7220 | objc_start_method_definition (false /* is_class_method */, decl, NULL_TREE, |
7221 | NULL_TREE); | |
d764a8e6 | 7222 | body = c_begin_compound_stmt (true); |
e31c7eec | 7223 | |
d764a8e6 IS |
7224 | /* Now we need to decide how we build the getter. There are three |
7225 | cases: | |
a1178b30 | 7226 | |
d764a8e6 IS |
7227 | for 'copy' or 'retain' properties we need to use the |
7228 | objc_getProperty() accessor helper which knows about retain and | |
7229 | copy. It supports both 'nonatomic' and 'atomic' access. | |
2debdb4f | 7230 | |
d764a8e6 IS |
7231 | for 'nonatomic, assign' properties we can access the instance |
7232 | variable directly. 'nonatomic' means we don't have to use locks, | |
7233 | and 'assign' means we don't have to worry about retain or copy. | |
7234 | If you combine the two, it means we can just access the instance | |
7235 | variable directly. | |
2debdb4f | 7236 | |
d764a8e6 IS |
7237 | for 'atomic, assign' properties we use objc_copyStruct() (for the |
7238 | next runtime) or objc_getPropertyStruct() (for the GNU runtime). */ | |
7239 | switch (PROPERTY_ASSIGN_SEMANTICS (property)) | |
a1178b30 | 7240 | { |
d764a8e6 IS |
7241 | case OBJC_PROPERTY_RETAIN: |
7242 | case OBJC_PROPERTY_COPY: | |
7243 | { | |
7244 | /* We build "return objc_getProperty (self, _cmd, offset, is_atomic);" */ | |
7245 | tree cmd, ivar, offset, is_atomic; | |
7246 | cmd = TREE_CHAIN (DECL_ARGUMENTS (current_function_decl)); | |
2debdb4f | 7247 | |
d764a8e6 IS |
7248 | /* Find the ivar to compute the offset. */ |
7249 | ivar = lookup_ivar (klass, PROPERTY_IVAR_NAME (property)); | |
7250 | if (!ivar || is_private (ivar)) | |
7251 | { | |
7252 | /* This should never happen. */ | |
7253 | error_at (location, | |
7254 | "can not find instance variable associated with property"); | |
7255 | ret_val = error_mark_node; | |
7256 | break; | |
7257 | } | |
7258 | offset = byte_position (ivar); | |
2debdb4f | 7259 | |
d764a8e6 IS |
7260 | if (PROPERTY_NONATOMIC (property)) |
7261 | is_atomic = boolean_false_node; | |
7262 | else | |
7263 | is_atomic = boolean_true_node; | |
7264 | ||
7265 | ret_val = build_function_call | |
7266 | (location, | |
7267 | /* Function prototype. */ | |
7268 | objc_getProperty_decl, | |
7269 | /* Parameters. */ | |
7270 | tree_cons /* self */ | |
7271 | (NULL_TREE, self_decl, | |
7272 | tree_cons /* _cmd */ | |
7273 | (NULL_TREE, cmd, | |
7274 | tree_cons /* offset */ | |
7275 | (NULL_TREE, offset, | |
7276 | tree_cons /* is_atomic */ | |
7277 | (NULL_TREE, is_atomic, NULL_TREE))))); | |
7278 | } | |
7279 | break; | |
944fb799 | 7280 | case OBJC_PROPERTY_ASSIGN: |
d764a8e6 IS |
7281 | if (PROPERTY_NONATOMIC (property)) |
7282 | { | |
7283 | /* We build "return self->PROPERTY_IVAR_NAME;" */ | |
7284 | ret_val = objc_lookup_ivar (NULL_TREE, PROPERTY_IVAR_NAME (property)); | |
7285 | break; | |
7286 | } | |
7287 | else | |
7288 | { | |
7289 | /* We build | |
7290 | <property type> __objc_property_temp; | |
7291 | objc_getPropertyStruct (&__objc_property_temp, | |
7292 | &(self->PROPERTY_IVAR_NAME), | |
7293 | sizeof (type of self->PROPERTY_IVAR_NAME), | |
7294 | is_atomic, | |
7295 | false) | |
7296 | return __objc_property_temp; | |
7297 | ||
7298 | For the NeXT runtime, we need to use objc_copyStruct | |
7299 | instead of objc_getPropertyStruct. */ | |
7300 | tree objc_property_temp_decl, function_decl, function_call; | |
7301 | tree size_of, is_atomic; | |
7302 | ||
7303 | objc_property_temp_decl = objc_create_temporary_var (TREE_TYPE (property), "__objc_property_temp"); | |
7304 | DECL_SOURCE_LOCATION (objc_property_temp_decl) = location; | |
7305 | objc_property_temp_decl = lang_hooks.decls.pushdecl (objc_property_temp_decl); | |
7306 | ||
7307 | /* sizeof (ivar type). Since the ivar and the property have | |
7308 | the same type, there is no need to lookup the ivar. */ | |
7309 | size_of = c_sizeof_or_alignof_type (location, TREE_TYPE (property), | |
7310 | true /* is_sizeof */, | |
7311 | false /* complain */); | |
944fb799 | 7312 | |
d764a8e6 IS |
7313 | if (PROPERTY_NONATOMIC (property)) |
7314 | is_atomic = boolean_false_node; | |
2debdb4f | 7315 | else |
d764a8e6 | 7316 | is_atomic = boolean_true_node; |
944fb799 | 7317 | |
d764a8e6 IS |
7318 | if (objc_copyStruct_decl) |
7319 | function_decl = objc_copyStruct_decl; | |
7320 | else | |
7321 | function_decl = objc_getPropertyStruct_decl; | |
7322 | ||
7323 | function_call = build_function_call | |
7324 | (location, | |
7325 | /* Function prototype. */ | |
7326 | function_decl, | |
7327 | /* Parameters. */ | |
7328 | tree_cons /* &__objc_property_temp_decl */ | |
7329 | /* Warning: note that using build_fold_addr_expr_loc() | |
7330 | here causes invalid code to be generated. */ | |
7331 | (NULL_TREE, build_unary_op (location, ADDR_EXPR, objc_property_temp_decl, 0), | |
7332 | tree_cons /* &(self->PROPERTY_IVAR_NAME); */ | |
944fb799 MS |
7333 | (NULL_TREE, build_fold_addr_expr_loc (location, |
7334 | objc_lookup_ivar | |
d764a8e6 IS |
7335 | (NULL_TREE, PROPERTY_IVAR_NAME (property))), |
7336 | tree_cons /* sizeof (PROPERTY_IVAR) */ | |
7337 | (NULL_TREE, size_of, | |
7338 | tree_cons /* is_atomic */ | |
7339 | (NULL_TREE, is_atomic, | |
7340 | /* TODO: This is currently ignored by the GNU | |
7341 | runtime, but what about the next one ? */ | |
7342 | tree_cons /* has_strong */ | |
7343 | (NULL_TREE, boolean_true_node, NULL_TREE)))))); | |
7344 | ||
7345 | add_stmt (function_call); | |
7346 | ||
7347 | ret_val = objc_property_temp_decl; | |
2debdb4f | 7348 | } |
d764a8e6 IS |
7349 | break; |
7350 | default: | |
7351 | gcc_unreachable (); | |
2debdb4f NP |
7352 | } |
7353 | ||
d764a8e6 | 7354 | gcc_assert (ret_val); |
a1178b30 | 7355 | |
d764a8e6 IS |
7356 | #ifdef OBJCPLUS |
7357 | finish_return_stmt (ret_val); | |
7358 | #else | |
7359 | c_finish_return (location, ret_val, NULL_TREE); | |
7360 | #endif | |
7361 | ||
7362 | add_stmt (c_end_compound_stmt (location, body, true)); | |
7363 | fn = current_function_decl; | |
7364 | #ifdef OBJCPLUS | |
7365 | finish_function (); | |
7366 | #endif | |
7367 | objc_finish_method_definition (fn); | |
a1178b30 IS |
7368 | } |
7369 | ||
d764a8e6 | 7370 | /* This routine synthesizes a 'setter' method. */ |
af35aeb2 | 7371 | |
d764a8e6 IS |
7372 | static void |
7373 | objc_synthesize_setter (tree klass, tree class_methods ATTRIBUTE_UNUSED, tree property) | |
6c65299b | 7374 | { |
d764a8e6 IS |
7375 | location_t location = DECL_SOURCE_LOCATION (property); |
7376 | tree fn, decl; | |
7377 | tree body; | |
7378 | tree new_value, statement; | |
6c65299b | 7379 | |
d764a8e6 IS |
7380 | /* If user has implemented a setter with same name then do nothing. */ |
7381 | if (lookup_method (CLASS_NST_METHODS (objc_implementation_context), | |
7382 | PROPERTY_SETTER_NAME (property))) | |
7383 | return; | |
6c65299b | 7384 | |
d764a8e6 IS |
7385 | /* Find declaration of the property setter in the interface (or |
7386 | superclass, or protocol). There must be one. */ | |
7387 | decl = lookup_method_static (klass, PROPERTY_SETTER_NAME (property), 0); | |
6c65299b | 7388 | |
d764a8e6 IS |
7389 | /* If one not declared in the interface, this condition has already |
7390 | been reported as user error (because property was not declared in | |
7391 | the interface). */ | |
7392 | if (!decl) | |
7393 | return; | |
264fa2db | 7394 | |
d764a8e6 IS |
7395 | /* Adapt the 'decl'. Use the source location of the @synthesize |
7396 | statement for error messages. */ | |
7397 | decl = copy_node (decl); | |
7398 | DECL_SOURCE_LOCATION (decl) = DECL_SOURCE_LOCATION (property); | |
6408ef33 | 7399 | |
a04a722b JM |
7400 | objc_start_method_definition (false /* is_class_method */, decl, NULL_TREE, |
7401 | NULL_TREE); | |
9eb892ec | 7402 | |
d764a8e6 | 7403 | body = c_begin_compound_stmt (true); |
6c65299b | 7404 | |
d764a8e6 IS |
7405 | /* The 'new_value' is the only argument to the method, which is the |
7406 | 3rd argument of the function, after self and _cmd. We use twice | |
7407 | TREE_CHAIN to move forward two arguments. */ | |
7408 | new_value = TREE_CHAIN (TREE_CHAIN (DECL_ARGUMENTS (current_function_decl))); | |
7409 | ||
7410 | /* This would presumably happen if the user has specified a | |
7411 | prototype for the setter that does not have an argument! */ | |
7412 | if (new_value == NULL_TREE) | |
6c65299b | 7413 | { |
d764a8e6 IS |
7414 | /* TODO: This should be caught much earlier than this. */ |
7415 | error_at (DECL_SOURCE_LOCATION (decl), "invalid setter, it must have one argument"); | |
7416 | /* Try to recover somehow. */ | |
7417 | new_value = error_mark_node; | |
7418 | } | |
6408ef33 | 7419 | |
d764a8e6 IS |
7420 | /* Now we need to decide how we build the setter. There are three |
7421 | cases: | |
26877873 | 7422 | |
d764a8e6 IS |
7423 | for 'copy' or 'retain' properties we need to use the |
7424 | objc_setProperty() accessor helper which knows about retain and | |
7425 | copy. It supports both 'nonatomic' and 'atomic' access. | |
6408ef33 | 7426 | |
d764a8e6 IS |
7427 | for 'nonatomic, assign' properties we can access the instance |
7428 | variable directly. 'nonatomic' means we don't have to use locks, | |
7429 | and 'assign' means we don't have to worry about retain or copy. | |
7430 | If you combine the two, it means we can just access the instance | |
7431 | variable directly. | |
6c65299b | 7432 | |
d764a8e6 IS |
7433 | for 'atomic, assign' properties we use objc_copyStruct() (for the |
7434 | next runtime) or objc_setPropertyStruct() (for the GNU runtime). */ | |
7435 | switch (PROPERTY_ASSIGN_SEMANTICS (property)) | |
6c65299b | 7436 | { |
d764a8e6 IS |
7437 | case OBJC_PROPERTY_RETAIN: |
7438 | case OBJC_PROPERTY_COPY: | |
7439 | { | |
7440 | /* We build "objc_setProperty (self, _cmd, new_value, offset, is_atomic, should_copy);" */ | |
7441 | tree cmd, ivar, offset, is_atomic, should_copy; | |
7442 | cmd = TREE_CHAIN (DECL_ARGUMENTS (current_function_decl)); | |
6c65299b | 7443 | |
d764a8e6 IS |
7444 | /* Find the ivar to compute the offset. */ |
7445 | ivar = lookup_ivar (klass, PROPERTY_IVAR_NAME (property)); | |
7446 | if (!ivar || is_private (ivar)) | |
7447 | { | |
7448 | error_at (location, | |
7449 | "can not find instance variable associated with property"); | |
7450 | statement = error_mark_node; | |
7451 | break; | |
7452 | } | |
7453 | offset = byte_position (ivar); | |
6c65299b | 7454 | |
d764a8e6 IS |
7455 | if (PROPERTY_NONATOMIC (property)) |
7456 | is_atomic = boolean_false_node; | |
7457 | else | |
7458 | is_atomic = boolean_true_node; | |
944fb799 | 7459 | |
d764a8e6 IS |
7460 | if (PROPERTY_ASSIGN_SEMANTICS (property) == OBJC_PROPERTY_COPY) |
7461 | should_copy = boolean_true_node; | |
7462 | else | |
7463 | should_copy = boolean_false_node; | |
38b9c8c3 | 7464 | |
d764a8e6 IS |
7465 | statement = build_function_call |
7466 | (location, | |
7467 | /* Function prototype. */ | |
7468 | objc_setProperty_decl, | |
7469 | /* Parameters. */ | |
7470 | tree_cons /* self */ | |
7471 | (NULL_TREE, self_decl, | |
7472 | tree_cons /* _cmd */ | |
7473 | (NULL_TREE, cmd, | |
7474 | tree_cons /* offset */ | |
7475 | (NULL_TREE, offset, | |
7476 | tree_cons /* new_value */ | |
7477 | (NULL_TREE, new_value, | |
7478 | tree_cons /* is_atomic */ | |
944fb799 | 7479 | (NULL_TREE, is_atomic, |
d764a8e6 IS |
7480 | tree_cons /* should_copy */ |
7481 | (NULL_TREE, should_copy, NULL_TREE))))))); | |
7482 | } | |
7483 | break; | |
944fb799 | 7484 | case OBJC_PROPERTY_ASSIGN: |
d764a8e6 IS |
7485 | if (PROPERTY_NONATOMIC (property)) |
7486 | { | |
7487 | /* We build "self->PROPERTY_IVAR_NAME = new_value;" */ | |
7488 | statement = build_modify_expr | |
7489 | (location, | |
7490 | objc_lookup_ivar (NULL_TREE, PROPERTY_IVAR_NAME (property)), | |
944fb799 | 7491 | NULL_TREE, NOP_EXPR, |
d764a8e6 IS |
7492 | location, new_value, NULL_TREE); |
7493 | break; | |
7494 | } | |
7495 | else | |
7496 | { | |
7497 | /* We build | |
7498 | objc_setPropertyStruct (&(self->PROPERTY_IVAR_NAME), | |
7499 | &new_value, | |
7500 | sizeof (type of self->PROPERTY_IVAR_NAME), | |
7501 | is_atomic, | |
7502 | false) | |
38b9c8c3 | 7503 | |
d764a8e6 IS |
7504 | For the NeXT runtime, we need to use objc_copyStruct |
7505 | instead of objc_getPropertyStruct. */ | |
7506 | tree function_decl, size_of, is_atomic; | |
52daca75 | 7507 | |
d764a8e6 IS |
7508 | /* sizeof (ivar type). Since the ivar and the property have |
7509 | the same type, there is no need to lookup the ivar. */ | |
7510 | size_of = c_sizeof_or_alignof_type (location, TREE_TYPE (property), | |
7511 | true /* is_sizeof */, | |
7512 | false /* complain */); | |
944fb799 | 7513 | |
d764a8e6 IS |
7514 | if (PROPERTY_NONATOMIC (property)) |
7515 | is_atomic = boolean_false_node; | |
52daca75 | 7516 | else |
d764a8e6 | 7517 | is_atomic = boolean_true_node; |
944fb799 | 7518 | |
d764a8e6 IS |
7519 | if (objc_copyStruct_decl) |
7520 | function_decl = objc_copyStruct_decl; | |
7521 | else | |
7522 | function_decl = objc_setPropertyStruct_decl; | |
52daca75 | 7523 | |
944fb799 | 7524 | statement = build_function_call |
d764a8e6 IS |
7525 | (location, |
7526 | /* Function prototype. */ | |
7527 | function_decl, | |
7528 | /* Parameters. */ | |
7529 | tree_cons /* &(self->PROPERTY_IVAR_NAME); */ | |
944fb799 MS |
7530 | (NULL_TREE, build_fold_addr_expr_loc (location, |
7531 | objc_lookup_ivar | |
d764a8e6 IS |
7532 | (NULL_TREE, PROPERTY_IVAR_NAME (property))), |
7533 | tree_cons /* &new_value */ | |
7534 | (NULL_TREE, build_fold_addr_expr_loc (location, new_value), | |
7535 | tree_cons /* sizeof (PROPERTY_IVAR) */ | |
7536 | (NULL_TREE, size_of, | |
7537 | tree_cons /* is_atomic */ | |
7538 | (NULL_TREE, is_atomic, | |
7539 | /* TODO: This is currently ignored by the GNU | |
7540 | runtime, but what about the next one ? */ | |
7541 | tree_cons /* has_strong */ | |
7542 | (NULL_TREE, boolean_true_node, NULL_TREE)))))); | |
7543 | } | |
7544 | break; | |
7545 | default: | |
7546 | gcc_unreachable (); | |
6c65299b | 7547 | } |
d764a8e6 | 7548 | gcc_assert (statement); |
6c65299b | 7549 | |
944fb799 | 7550 | add_stmt (statement); |
d764a8e6 IS |
7551 | add_stmt (c_end_compound_stmt (location, body, true)); |
7552 | fn = current_function_decl; | |
7553 | #ifdef OBJCPLUS | |
7554 | finish_function (); | |
7555 | #endif | |
7556 | objc_finish_method_definition (fn); | |
7557 | } | |
59ce3fc8 | 7558 | |
d764a8e6 IS |
7559 | /* This function is a sub-routine of objc_add_synthesize_declaration. |
7560 | It is called for each property to synthesize once we have | |
7561 | determined that the context is Ok. */ | |
7562 | static void | |
7563 | objc_add_synthesize_declaration_for_property (location_t location, tree interface, | |
7564 | tree property_name, tree ivar_name) | |
6c65299b | 7565 | { |
d764a8e6 IS |
7566 | /* Find the @property declaration. */ |
7567 | tree property; | |
7568 | tree x; | |
f2e6e530 | 7569 | |
d764a8e6 IS |
7570 | /* Check that synthesize or dynamic has not already been used for |
7571 | the same property. */ | |
7572 | for (property = IMPL_PROPERTY_DECL (objc_implementation_context); property; property = TREE_CHAIN (property)) | |
7573 | if (PROPERTY_NAME (property) == property_name) | |
7574 | { | |
7575 | location_t original_location = DECL_SOURCE_LOCATION (property); | |
944fb799 | 7576 | |
d764a8e6 | 7577 | if (PROPERTY_DYNAMIC (property)) |
944fb799 | 7578 | error_at (location, "property %qs already specified in %<@dynamic%>", |
d764a8e6 IS |
7579 | IDENTIFIER_POINTER (property_name)); |
7580 | else | |
944fb799 | 7581 | error_at (location, "property %qs already specified in %<@synthesize%>", |
d764a8e6 | 7582 | IDENTIFIER_POINTER (property_name)); |
944fb799 | 7583 | |
d764a8e6 IS |
7584 | if (original_location != UNKNOWN_LOCATION) |
7585 | inform (original_location, "originally specified here"); | |
7586 | return; | |
7587 | } | |
011d50d9 | 7588 | |
d764a8e6 IS |
7589 | /* Check that the property is declared in the interface. It could |
7590 | also be declared in a superclass or protocol. */ | |
7591 | property = lookup_property (interface, property_name); | |
264fa2db | 7592 | |
d764a8e6 | 7593 | if (!property) |
264fa2db | 7594 | { |
944fb799 | 7595 | error_at (location, "no declaration of property %qs found in the interface", |
d764a8e6 IS |
7596 | IDENTIFIER_POINTER (property_name)); |
7597 | return; | |
7598 | } | |
7599 | else | |
7600 | { | |
7601 | /* We have to copy the property, because we want to chain it to | |
7602 | the implementation context, and we want to store the source | |
7603 | location of the @synthesize, not of the original | |
7604 | @property. */ | |
7605 | property = copy_node (property); | |
7606 | DECL_SOURCE_LOCATION (property) = location; | |
6c65299b | 7607 | } |
6c65299b | 7608 | |
d764a8e6 IS |
7609 | /* Determine PROPERTY_IVAR_NAME. */ |
7610 | if (ivar_name == NULL_TREE) | |
7611 | ivar_name = property_name; | |
6c65299b | 7612 | |
d764a8e6 IS |
7613 | /* Check that the instance variable exists. You can only use an |
7614 | instance variable from the same class, not one from the | |
7615 | superclass (this makes sense as it allows us to check that an | |
7616 | instance variable is only used in one synthesized property). */ | |
7617 | { | |
7618 | tree ivar = is_ivar (CLASS_IVARS (interface), ivar_name); | |
7619 | tree type_of_ivar; | |
7620 | if (!ivar) | |
7621 | { | |
944fb799 | 7622 | error_at (location, "ivar %qs used by %<@synthesize%> declaration must be an existing ivar", |
d764a8e6 IS |
7623 | IDENTIFIER_POINTER (property_name)); |
7624 | return; | |
7625 | } | |
6c65299b | 7626 | |
d764a8e6 IS |
7627 | if (DECL_BIT_FIELD_TYPE (ivar)) |
7628 | type_of_ivar = DECL_BIT_FIELD_TYPE (ivar); | |
7629 | else | |
7630 | type_of_ivar = TREE_TYPE (ivar); | |
944fb799 | 7631 | |
d764a8e6 IS |
7632 | /* If the instance variable has a different C type, we throw an error ... */ |
7633 | if (!comptypes (TREE_TYPE (property), type_of_ivar) | |
7634 | /* ... unless the property is readonly, in which case we allow | |
7635 | the instance variable to be more specialized (this means we | |
7636 | can generate the getter all right and it works). */ | |
7637 | && (!PROPERTY_READONLY (property) | |
7638 | || !objc_compare_types (TREE_TYPE (property), | |
7639 | type_of_ivar, -5, NULL_TREE))) | |
7640 | { | |
7641 | location_t original_location = DECL_SOURCE_LOCATION (ivar); | |
944fb799 | 7642 | |
d764a8e6 IS |
7643 | error_at (location, "property %qs is using instance variable %qs of incompatible type", |
7644 | IDENTIFIER_POINTER (property_name), | |
7645 | IDENTIFIER_POINTER (ivar_name)); | |
944fb799 | 7646 | |
d764a8e6 IS |
7647 | if (original_location != UNKNOWN_LOCATION) |
7648 | inform (original_location, "originally specified here"); | |
7649 | } | |
e31c7eec | 7650 | |
d764a8e6 IS |
7651 | /* If the instance variable is a bitfield, the property must be |
7652 | 'assign', 'nonatomic' because the runtime getter/setter helper | |
7653 | do not work with bitfield instance variables. */ | |
7654 | if (DECL_BIT_FIELD_TYPE (ivar)) | |
7655 | { | |
7656 | /* If there is an error, we return and not generate any | |
7657 | getter/setter because trying to set up the runtime | |
7658 | getter/setter helper calls with bitfields is at high risk | |
7659 | of ICE. */ | |
6c65299b | 7660 | |
d764a8e6 IS |
7661 | if (PROPERTY_ASSIGN_SEMANTICS (property) != OBJC_PROPERTY_ASSIGN) |
7662 | { | |
7663 | location_t original_location = DECL_SOURCE_LOCATION (ivar); | |
944fb799 | 7664 | |
d764a8e6 IS |
7665 | error_at (location, "'assign' property %qs is using bit-field instance variable %qs", |
7666 | IDENTIFIER_POINTER (property_name), | |
7667 | IDENTIFIER_POINTER (ivar_name)); | |
944fb799 | 7668 | |
d764a8e6 IS |
7669 | if (original_location != UNKNOWN_LOCATION) |
7670 | inform (original_location, "originally specified here"); | |
7671 | return; | |
7672 | } | |
6c65299b | 7673 | |
d764a8e6 IS |
7674 | if (!PROPERTY_NONATOMIC (property)) |
7675 | { | |
7676 | location_t original_location = DECL_SOURCE_LOCATION (ivar); | |
944fb799 | 7677 | |
d764a8e6 IS |
7678 | error_at (location, "'atomic' property %qs is using bit-field instance variable %qs", |
7679 | IDENTIFIER_POINTER (property_name), | |
7680 | IDENTIFIER_POINTER (ivar_name)); | |
944fb799 | 7681 | |
d764a8e6 IS |
7682 | if (original_location != UNKNOWN_LOCATION) |
7683 | inform (original_location, "originally specified here"); | |
7684 | return; | |
7685 | } | |
7686 | } | |
7687 | } | |
6c65299b | 7688 | |
d764a8e6 IS |
7689 | /* Check that no other property is using the same instance |
7690 | variable. */ | |
7691 | for (x = IMPL_PROPERTY_DECL (objc_implementation_context); x; x = TREE_CHAIN (x)) | |
7692 | if (PROPERTY_IVAR_NAME (x) == ivar_name) | |
7693 | { | |
7694 | location_t original_location = DECL_SOURCE_LOCATION (x); | |
944fb799 | 7695 | |
d764a8e6 IS |
7696 | error_at (location, "property %qs is using the same instance variable as property %qs", |
7697 | IDENTIFIER_POINTER (property_name), | |
7698 | IDENTIFIER_POINTER (PROPERTY_NAME (x))); | |
944fb799 | 7699 | |
d764a8e6 IS |
7700 | if (original_location != UNKNOWN_LOCATION) |
7701 | inform (original_location, "originally specified here"); | |
944fb799 | 7702 | |
d764a8e6 IS |
7703 | /* We keep going on. This won't cause the compiler to fail; |
7704 | the failure would most likely be at runtime. */ | |
7705 | } | |
6c65299b | 7706 | |
d764a8e6 IS |
7707 | /* Note that a @synthesize (and only a @synthesize) always sets |
7708 | PROPERTY_IVAR_NAME to a non-NULL_TREE. You can recognize a | |
7709 | @synthesize by that. */ | |
7710 | PROPERTY_IVAR_NAME (property) = ivar_name; | |
944fb799 | 7711 | |
d764a8e6 IS |
7712 | /* PROPERTY_SETTER_NAME and PROPERTY_GETTER_NAME are copied from the |
7713 | original declaration; they are always set (with the exception of | |
7714 | PROPERTY_SETTER_NAME not being set if PROPERTY_READONLY == 1). */ | |
6c65299b | 7715 | |
d764a8e6 IS |
7716 | /* Add the property to the list of properties for current implementation. */ |
7717 | TREE_CHAIN (property) = IMPL_PROPERTY_DECL (objc_implementation_context); | |
7718 | IMPL_PROPERTY_DECL (objc_implementation_context) = property; | |
6c65299b | 7719 | |
d764a8e6 IS |
7720 | /* Note how we don't actually synthesize the getter/setter here; it |
7721 | would be very natural, but we may miss the fact that the user has | |
7722 | implemented his own getter/setter later on in the @implementation | |
7723 | (in which case we shouldn't generate getter/setter). We wait | |
7724 | until we have parsed it all before generating the code. */ | |
7725 | } | |
6c65299b | 7726 | |
d764a8e6 IS |
7727 | /* This function is called by the parser after a @synthesize |
7728 | expression is parsed. 'location' is the location of the | |
7729 | @synthesize expression, and 'property_and_ivar_list' is a chained | |
7730 | list of the property and ivar names. */ | |
7731 | void | |
7732 | objc_add_synthesize_declaration (location_t location, tree property_and_ivar_list) | |
7733 | { | |
7734 | tree interface, chain; | |
264fa2db | 7735 | |
d764a8e6 IS |
7736 | if (flag_objc1_only) |
7737 | error_at (input_location, "%<@synthesize%> is not available in Objective-C 1.0"); | |
8607f1bc | 7738 | |
d764a8e6 IS |
7739 | if (property_and_ivar_list == error_mark_node) |
7740 | return; | |
81ff723b | 7741 | |
d764a8e6 IS |
7742 | if (!objc_implementation_context) |
7743 | { | |
7744 | /* We can get here only in Objective-C; the Objective-C++ parser | |
7745 | detects the problem while parsing, outputs the error | |
7746 | "misplaced '@synthesize' Objective-C++ construct" and skips | |
7747 | the declaration. */ | |
7748 | error_at (location, "%<@synthesize%> not in @implementation context"); | |
7749 | return; | |
7750 | } | |
81ff723b | 7751 | |
d764a8e6 IS |
7752 | if (TREE_CODE (objc_implementation_context) == CATEGORY_IMPLEMENTATION_TYPE) |
7753 | { | |
7754 | error_at (location, "%<@synthesize%> can not be used in categories"); | |
7755 | return; | |
7756 | } | |
64ee9490 | 7757 | |
d764a8e6 IS |
7758 | interface = lookup_interface (CLASS_NAME (objc_implementation_context)); |
7759 | if (!interface) | |
81ff723b | 7760 | { |
d764a8e6 | 7761 | /* I can't see how this could happen, but it is good as a safety check. */ |
944fb799 | 7762 | error_at (location, |
d764a8e6 IS |
7763 | "%<@synthesize%> requires the @interface of the class to be available"); |
7764 | return; | |
81ff723b | 7765 | } |
264fa2db | 7766 | |
d764a8e6 IS |
7767 | /* Now, iterate over the properties and do each of them. */ |
7768 | for (chain = property_and_ivar_list; chain; chain = TREE_CHAIN (chain)) | |
7769 | { | |
944fb799 | 7770 | objc_add_synthesize_declaration_for_property (location, interface, TREE_VALUE (chain), |
d764a8e6 IS |
7771 | TREE_PURPOSE (chain)); |
7772 | } | |
264fa2db ZL |
7773 | } |
7774 | ||
d764a8e6 IS |
7775 | /* This function is a sub-routine of objc_add_dynamic_declaration. It |
7776 | is called for each property to mark as dynamic once we have | |
7777 | determined that the context is Ok. */ | |
7778 | static void | |
7779 | objc_add_dynamic_declaration_for_property (location_t location, tree interface, | |
7780 | tree property_name) | |
011d50d9 | 7781 | { |
d764a8e6 IS |
7782 | /* Find the @property declaration. */ |
7783 | tree property; | |
668ea4b1 | 7784 | |
d764a8e6 IS |
7785 | /* Check that synthesize or dynamic has not already been used for |
7786 | the same property. */ | |
7787 | for (property = IMPL_PROPERTY_DECL (objc_implementation_context); property; property = TREE_CHAIN (property)) | |
7788 | if (PROPERTY_NAME (property) == property_name) | |
7789 | { | |
7790 | location_t original_location = DECL_SOURCE_LOCATION (property); | |
944fb799 | 7791 | |
d764a8e6 | 7792 | if (PROPERTY_DYNAMIC (property)) |
944fb799 | 7793 | error_at (location, "property %qs already specified in %<@dynamic%>", |
d764a8e6 IS |
7794 | IDENTIFIER_POINTER (property_name)); |
7795 | else | |
7796 | error_at (location, "property %qs already specified in %<@synthesize%>", | |
7797 | IDENTIFIER_POINTER (property_name)); | |
264fa2db | 7798 | |
d764a8e6 IS |
7799 | if (original_location != UNKNOWN_LOCATION) |
7800 | inform (original_location, "originally specified here"); | |
7801 | return; | |
7802 | } | |
38b9c8c3 | 7803 | |
d764a8e6 IS |
7804 | /* Check that the property is declared in the interface. It could |
7805 | also be declared in a superclass or protocol. */ | |
7806 | property = lookup_property (interface, property_name); | |
264fa2db | 7807 | |
d764a8e6 | 7808 | if (!property) |
264fa2db | 7809 | { |
d764a8e6 IS |
7810 | error_at (location, "no declaration of property %qs found in the interface", |
7811 | IDENTIFIER_POINTER (property_name)); | |
7812 | return; | |
8607f1bc | 7813 | } |
d764a8e6 | 7814 | else |
6c65299b | 7815 | { |
d764a8e6 IS |
7816 | /* We have to copy the property, because we want to chain it to |
7817 | the implementation context, and we want to store the source | |
7818 | location of the @synthesize, not of the original | |
7819 | @property. */ | |
7820 | property = copy_node (property); | |
7821 | DECL_SOURCE_LOCATION (property) = location; | |
7822 | } | |
e31c7eec | 7823 | |
d764a8e6 IS |
7824 | /* Note that a @dynamic (and only a @dynamic) always sets |
7825 | PROPERTY_DYNAMIC to 1. You can recognize a @dynamic by that. | |
7826 | (actually, as explained above, PROPERTY_DECL generated by | |
7827 | @property and associated with a @dynamic property are also marked | |
7828 | as PROPERTY_DYNAMIC). */ | |
7829 | PROPERTY_DYNAMIC (property) = 1; | |
3a3589b4 | 7830 | |
d764a8e6 IS |
7831 | /* Add the property to the list of properties for current implementation. */ |
7832 | TREE_CHAIN (property) = IMPL_PROPERTY_DECL (objc_implementation_context); | |
7833 | IMPL_PROPERTY_DECL (objc_implementation_context) = property; | |
7834 | } | |
3a3589b4 | 7835 | |
d764a8e6 IS |
7836 | /* This function is called by the parser after a @dynamic expression |
7837 | is parsed. 'location' is the location of the @dynamic expression, | |
7838 | and 'property_list' is a chained list of all the property | |
7839 | names. */ | |
7840 | void | |
7841 | objc_add_dynamic_declaration (location_t location, tree property_list) | |
7842 | { | |
7843 | tree interface, chain; | |
264fa2db | 7844 | |
d764a8e6 IS |
7845 | if (flag_objc1_only) |
7846 | error_at (input_location, "%<@dynamic%> is not available in Objective-C 1.0"); | |
e31c7eec | 7847 | |
d764a8e6 IS |
7848 | if (property_list == error_mark_node) |
7849 | return; | |
264fa2db | 7850 | |
d764a8e6 IS |
7851 | if (!objc_implementation_context) |
7852 | { | |
7853 | /* We can get here only in Objective-C; the Objective-C++ parser | |
7854 | detects the problem while parsing, outputs the error | |
7855 | "misplaced '@dynamic' Objective-C++ construct" and skips the | |
7856 | declaration. */ | |
7857 | error_at (location, "%<@dynamic%> not in @implementation context"); | |
7858 | return; | |
64ee9490 | 7859 | } |
e31c7eec | 7860 | |
d764a8e6 IS |
7861 | /* @dynamic is allowed in categories. */ |
7862 | switch (TREE_CODE (objc_implementation_context)) | |
3a3589b4 | 7863 | { |
d764a8e6 IS |
7864 | case CLASS_IMPLEMENTATION_TYPE: |
7865 | interface = lookup_interface (CLASS_NAME (objc_implementation_context)); | |
7866 | break; | |
7867 | case CATEGORY_IMPLEMENTATION_TYPE: | |
944fb799 | 7868 | interface = lookup_category (implementation_template, |
d764a8e6 IS |
7869 | CLASS_SUPER_NAME (objc_implementation_context)); |
7870 | break; | |
7871 | default: | |
7872 | gcc_unreachable (); | |
7873 | } | |
3a3589b4 | 7874 | |
d764a8e6 IS |
7875 | if (!interface) |
7876 | { | |
7877 | /* I can't see how this could happen, but it is good as a safety check. */ | |
7878 | error_at (location, | |
7879 | "%<@dynamic%> requires the @interface of the class to be available"); | |
7880 | return; | |
3a3589b4 ZL |
7881 | } |
7882 | ||
d764a8e6 IS |
7883 | /* Now, iterate over the properties and do each of them. */ |
7884 | for (chain = property_list; chain; chain = TREE_CHAIN (chain)) | |
6c65299b | 7885 | { |
d764a8e6 IS |
7886 | objc_add_dynamic_declaration_for_property (location, interface, TREE_VALUE (chain)); |
7887 | } | |
7888 | } | |
011d50d9 | 7889 | |
944fb799 | 7890 | /* Main routine to generate code/data for all the property information for |
d764a8e6 IS |
7891 | current implementation (class or category). CLASS is the interface where |
7892 | ivars are declared. CLASS_METHODS is where methods are found which | |
7893 | could be a class or a category depending on whether we are implementing | |
7894 | property of a class or a category. */ | |
3a3589b4 | 7895 | |
d764a8e6 IS |
7896 | static void |
7897 | objc_gen_property_data (tree klass, tree class_methods) | |
7898 | { | |
7899 | tree x; | |
2debdb4f | 7900 | |
d764a8e6 IS |
7901 | for (x = IMPL_PROPERTY_DECL (objc_implementation_context); x; x = TREE_CHAIN (x)) |
7902 | { | |
7903 | /* @dynamic property - nothing to check or synthesize. */ | |
7904 | if (PROPERTY_DYNAMIC (x)) | |
7905 | continue; | |
944fb799 | 7906 | |
d764a8e6 IS |
7907 | /* @synthesize property - need to synthesize the accessors. */ |
7908 | if (PROPERTY_IVAR_NAME (x)) | |
b4f588c4 | 7909 | { |
d764a8e6 | 7910 | objc_synthesize_getter (klass, class_methods, x); |
944fb799 | 7911 | |
d764a8e6 IS |
7912 | if (PROPERTY_READONLY (x) == 0) |
7913 | objc_synthesize_setter (klass, class_methods, x); | |
7914 | ||
7915 | continue; | |
b4f588c4 | 7916 | } |
2debdb4f | 7917 | |
d764a8e6 IS |
7918 | gcc_unreachable (); |
7919 | } | |
7920 | } | |
6c65299b | 7921 | |
d764a8e6 | 7922 | /* This is called once we see the "@end" in an interface/implementation. */ |
6c65299b | 7923 | |
d764a8e6 IS |
7924 | static void |
7925 | finish_class (tree klass) | |
7926 | { | |
7927 | switch (TREE_CODE (klass)) | |
7928 | { | |
7929 | case CLASS_IMPLEMENTATION_TYPE: | |
7930 | { | |
7931 | /* All metadata generation is done in runtime.generate_metadata(). */ | |
944fb799 | 7932 | |
d764a8e6 IS |
7933 | /* Generate what needed for property; setters, getters, etc. */ |
7934 | objc_gen_property_data (implementation_template, implementation_template); | |
5d0f30f7 | 7935 | |
d764a8e6 IS |
7936 | if (implementation_template != objc_implementation_context) |
7937 | { | |
7938 | /* Ensure that all method listed in the interface contain bodies. */ | |
7939 | check_methods (CLASS_CLS_METHODS (implementation_template), | |
7940 | objc_implementation_context, '+'); | |
7941 | check_methods (CLASS_NST_METHODS (implementation_template), | |
7942 | objc_implementation_context, '-'); | |
5d0f30f7 | 7943 | |
d764a8e6 IS |
7944 | if (CLASS_PROTOCOL_LIST (implementation_template)) |
7945 | check_protocols (CLASS_PROTOCOL_LIST (implementation_template), | |
7946 | "class", | |
7947 | CLASS_NAME (objc_implementation_context)); | |
7948 | } | |
7949 | break; | |
7950 | } | |
7951 | case CATEGORY_IMPLEMENTATION_TYPE: | |
7952 | { | |
7953 | tree category = lookup_category (implementation_template, CLASS_SUPER_NAME (klass)); | |
944fb799 | 7954 | |
d764a8e6 IS |
7955 | if (category) |
7956 | { | |
7957 | /* Generate what needed for property; setters, getters, etc. */ | |
7958 | objc_gen_property_data (implementation_template, category); | |
6c65299b | 7959 | |
d764a8e6 IS |
7960 | /* Ensure all method listed in the interface contain bodies. */ |
7961 | check_methods (CLASS_CLS_METHODS (category), | |
7962 | objc_implementation_context, '+'); | |
7963 | check_methods (CLASS_NST_METHODS (category), | |
7964 | objc_implementation_context, '-'); | |
944fb799 | 7965 | |
d764a8e6 IS |
7966 | if (CLASS_PROTOCOL_LIST (category)) |
7967 | check_protocols (CLASS_PROTOCOL_LIST (category), | |
7968 | "category", | |
7969 | CLASS_SUPER_NAME (objc_implementation_context)); | |
7970 | } | |
7971 | break; | |
7972 | } | |
7973 | case CLASS_INTERFACE_TYPE: | |
7974 | case CATEGORY_INTERFACE_TYPE: | |
7975 | case PROTOCOL_INTERFACE_TYPE: | |
7976 | { | |
7977 | /* Process properties of the class. */ | |
7978 | tree x; | |
7979 | for (x = CLASS_PROPERTY_DECL (objc_interface_context); x; x = TREE_CHAIN (x)) | |
7980 | { | |
7981 | /* Now we check that the appropriate getter is declared, | |
7982 | and if not, we declare one ourselves. */ | |
7983 | tree getter_decl = lookup_method (CLASS_NST_METHODS (klass), | |
7984 | PROPERTY_GETTER_NAME (x)); | |
944fb799 | 7985 | |
d764a8e6 IS |
7986 | if (getter_decl) |
7987 | { | |
7988 | /* TODO: Check that the declaration is consistent with the property. */ | |
7989 | ; | |
7990 | } | |
7991 | else | |
7992 | { | |
7993 | /* Generate an instance method declaration for the | |
7994 | getter; for example "- (id) name;". In general it | |
7995 | will be of the form | |
7996 | -(type)property_getter_name; */ | |
7997 | tree rettype = build_tree_list (NULL_TREE, TREE_TYPE (x)); | |
944fb799 MS |
7998 | getter_decl = build_method_decl (INSTANCE_METHOD_DECL, |
7999 | rettype, PROPERTY_GETTER_NAME (x), | |
d764a8e6 IS |
8000 | NULL_TREE, false); |
8001 | if (PROPERTY_OPTIONAL (x)) | |
8002 | objc_add_method (objc_interface_context, getter_decl, false, true); | |
8003 | else | |
8004 | objc_add_method (objc_interface_context, getter_decl, false, false); | |
8005 | TREE_DEPRECATED (getter_decl) = TREE_DEPRECATED (x); | |
8006 | METHOD_PROPERTY_CONTEXT (getter_decl) = x; | |
8007 | } | |
6c65299b | 8008 | |
d764a8e6 IS |
8009 | if (PROPERTY_READONLY (x) == 0) |
8010 | { | |
8011 | /* Now we check that the appropriate setter is declared, | |
8012 | and if not, we declare on ourselves. */ | |
944fb799 | 8013 | tree setter_decl = lookup_method (CLASS_NST_METHODS (klass), |
d764a8e6 | 8014 | PROPERTY_SETTER_NAME (x)); |
944fb799 | 8015 | |
d764a8e6 IS |
8016 | if (setter_decl) |
8017 | { | |
8018 | /* TODO: Check that the declaration is consistent with the property. */ | |
8019 | ; | |
8020 | } | |
8021 | else | |
8022 | { | |
8023 | /* The setter name is something like 'setName:'. | |
8024 | We need the substring 'setName' to build the | |
8025 | method declaration due to how the declaration | |
8026 | works. TODO: build_method_decl() will then | |
8027 | generate back 'setName:' from 'setName'; it | |
8028 | would be more efficient to hook into there. */ | |
8029 | const char *full_setter_name = IDENTIFIER_POINTER (PROPERTY_SETTER_NAME (x)); | |
8030 | size_t length = strlen (full_setter_name); | |
8031 | char *setter_name = (char *) alloca (length); | |
8032 | tree ret_type, selector, arg_type, arg_name; | |
944fb799 | 8033 | |
d764a8e6 IS |
8034 | strcpy (setter_name, full_setter_name); |
8035 | setter_name[length - 1] = '\0'; | |
8036 | ret_type = build_tree_list (NULL_TREE, void_type_node); | |
8037 | arg_type = build_tree_list (NULL_TREE, TREE_TYPE (x)); | |
8038 | arg_name = get_identifier ("_value"); | |
8039 | selector = objc_build_keyword_decl (get_identifier (setter_name), | |
8040 | arg_type, arg_name, NULL); | |
944fb799 | 8041 | setter_decl = build_method_decl (INSTANCE_METHOD_DECL, |
d764a8e6 IS |
8042 | ret_type, selector, |
8043 | build_tree_list (NULL_TREE, NULL_TREE), | |
8044 | false); | |
8045 | if (PROPERTY_OPTIONAL (x)) | |
8046 | objc_add_method (objc_interface_context, setter_decl, false, true); | |
8047 | else | |
8048 | objc_add_method (objc_interface_context, setter_decl, false, false); | |
8049 | TREE_DEPRECATED (setter_decl) = TREE_DEPRECATED (x); | |
8050 | METHOD_PROPERTY_CONTEXT (setter_decl) = x; | |
944fb799 | 8051 | } |
d764a8e6 IS |
8052 | } |
8053 | } | |
8054 | break; | |
8055 | } | |
8056 | default: | |
8057 | gcc_unreachable (); | |
8058 | break; | |
8059 | } | |
6c65299b | 8060 | } |
6c65299b RS |
8061 | |
8062 | static tree | |
d764a8e6 IS |
8063 | add_protocol (tree protocol) |
8064 | { | |
8065 | /* Put protocol on list in reverse order. */ | |
8066 | TREE_CHAIN (protocol) = protocol_chain; | |
8067 | protocol_chain = protocol; | |
8068 | return protocol_chain; | |
8069 | } | |
7427ba36 | 8070 | |
d764a8e6 IS |
8071 | /* Check that a protocol is defined, and, recursively, that all |
8072 | protocols that this protocol conforms to are defined too. */ | |
8073 | static void | |
8074 | check_that_protocol_is_defined (tree protocol) | |
8075 | { | |
8076 | if (!PROTOCOL_DEFINED (protocol)) | |
8077 | warning (0, "definition of protocol %qE not found", | |
8078 | PROTOCOL_NAME (protocol)); | |
8079 | ||
8080 | /* If the protocol itself conforms to other protocols, check them | |
8081 | too, recursively. */ | |
8082 | if (PROTOCOL_LIST (protocol)) | |
6c65299b | 8083 | { |
d764a8e6 | 8084 | tree p; |
7427ba36 | 8085 | |
d764a8e6 IS |
8086 | for (p = PROTOCOL_LIST (protocol); p; p = TREE_CHAIN (p)) |
8087 | check_that_protocol_is_defined (TREE_VALUE (p)); | |
7427ba36 | 8088 | } |
e31c7eec | 8089 | } |
7427ba36 | 8090 | |
d764a8e6 IS |
8091 | /* Looks up a protocol. If 'warn_if_deprecated' is true, a warning is |
8092 | emitted if the protocol is deprecated. If 'definition_required' is | |
8093 | true, a warning is emitted if a full @protocol definition has not | |
8094 | been seen. */ | |
8095 | static tree | |
8096 | lookup_protocol (tree ident, bool warn_if_deprecated, bool definition_required) | |
e31c7eec | 8097 | { |
d764a8e6 | 8098 | tree chain; |
e31c7eec | 8099 | |
d764a8e6 IS |
8100 | for (chain = protocol_chain; chain; chain = TREE_CHAIN (chain)) |
8101 | if (ident == PROTOCOL_NAME (chain)) | |
8102 | { | |
8103 | if (warn_if_deprecated && TREE_DEPRECATED (chain)) | |
8104 | { | |
8105 | /* It would be nice to use warn_deprecated_use() here, but | |
8106 | we are using TREE_CHAIN (which is supposed to be the | |
8107 | TYPE_STUB_DECL for a TYPE) for something different. */ | |
944fb799 | 8108 | warning (OPT_Wdeprecated_declarations, "protocol %qE is deprecated", |
d764a8e6 IS |
8109 | PROTOCOL_NAME (chain)); |
8110 | } | |
e31c7eec | 8111 | |
d764a8e6 IS |
8112 | if (definition_required) |
8113 | check_that_protocol_is_defined (chain); | |
e31c7eec | 8114 | |
d764a8e6 IS |
8115 | return chain; |
8116 | } | |
e31c7eec | 8117 | |
d764a8e6 IS |
8118 | return NULL_TREE; |
8119 | } | |
8120 | ||
8121 | /* This function forward declares the protocols named by NAMES. If | |
8122 | they are already declared or defined, the function has no effect. */ | |
8123 | ||
8124 | void | |
c59633d9 | 8125 | objc_declare_protocol (tree name, tree attributes) |
e31c7eec | 8126 | { |
d764a8e6 | 8127 | bool deprecated = false; |
e31c7eec | 8128 | |
d764a8e6 IS |
8129 | #ifdef OBJCPLUS |
8130 | if (current_namespace != global_namespace) { | |
8131 | error ("Objective-C declarations may only appear in global scope"); | |
8132 | } | |
8133 | #endif /* OBJCPLUS */ | |
8134 | ||
8135 | /* Determine if 'deprecated', the only attribute we recognize for | |
8136 | protocols, was used. Ignore all other attributes. */ | |
8137 | if (attributes) | |
e31c7eec | 8138 | { |
d764a8e6 IS |
8139 | tree attribute; |
8140 | for (attribute = attributes; attribute; attribute = TREE_CHAIN (attribute)) | |
8141 | { | |
8142 | tree name = TREE_PURPOSE (attribute); | |
944fb799 | 8143 | |
d764a8e6 IS |
8144 | if (is_attribute_p ("deprecated", name)) |
8145 | deprecated = true; | |
8146 | else | |
8147 | warning (OPT_Wattributes, "%qE attribute directive ignored", name); | |
8148 | } | |
6c65299b | 8149 | } |
e31c7eec | 8150 | |
c59633d9 NP |
8151 | if (lookup_protocol (name, /* warn if deprecated */ false, |
8152 | /* definition_required */ false) == NULL_TREE) | |
d764a8e6 | 8153 | { |
c59633d9 | 8154 | tree protocol = make_node (PROTOCOL_INTERFACE_TYPE); |
944fb799 | 8155 | |
c59633d9 NP |
8156 | TYPE_LANG_SLOT_1 (protocol) |
8157 | = make_tree_vec (PROTOCOL_LANG_SLOT_ELTS); | |
8158 | PROTOCOL_NAME (protocol) = name; | |
8159 | PROTOCOL_LIST (protocol) = NULL_TREE; | |
8160 | add_protocol (protocol); | |
8161 | PROTOCOL_DEFINED (protocol) = 0; | |
8162 | PROTOCOL_FORWARD_DECL (protocol) = NULL_TREE; | |
944fb799 | 8163 | |
c59633d9 | 8164 | if (attributes) |
5873a4c1 | 8165 | { |
c59633d9 NP |
8166 | /* TODO: Do we need to store the attributes here ? */ |
8167 | TYPE_ATTRIBUTES (protocol) = attributes; | |
8168 | if (deprecated) | |
8169 | TREE_DEPRECATED (protocol) = 1; | |
d764a8e6 | 8170 | } |
5873a4c1 | 8171 | } |
6c65299b | 8172 | } |
e31c7eec | 8173 | |
d764a8e6 IS |
8174 | static tree |
8175 | start_protocol (enum tree_code code, tree name, tree list, tree attributes) | |
6c65299b | 8176 | { |
d764a8e6 IS |
8177 | tree protocol; |
8178 | bool deprecated = false; | |
6c65299b | 8179 | |
d764a8e6 IS |
8180 | #ifdef OBJCPLUS |
8181 | if (current_namespace != global_namespace) { | |
8182 | error ("Objective-C declarations may only appear in global scope"); | |
8183 | } | |
8184 | #endif /* OBJCPLUS */ | |
6c65299b | 8185 | |
d764a8e6 IS |
8186 | /* Determine if 'deprecated', the only attribute we recognize for |
8187 | protocols, was used. Ignore all other attributes. */ | |
8188 | if (attributes) | |
ece4ce85 | 8189 | { |
d764a8e6 IS |
8190 | tree attribute; |
8191 | for (attribute = attributes; attribute; attribute = TREE_CHAIN (attribute)) | |
ece4ce85 | 8192 | { |
d764a8e6 | 8193 | tree name = TREE_PURPOSE (attribute); |
944fb799 | 8194 | |
d764a8e6 IS |
8195 | if (is_attribute_p ("deprecated", name)) |
8196 | deprecated = true; | |
8197 | else | |
8198 | warning (OPT_Wattributes, "%qE attribute directive ignored", name); | |
ece4ce85 NP |
8199 | } |
8200 | } | |
011d50d9 | 8201 | |
d764a8e6 IS |
8202 | protocol = lookup_protocol (name, /* warn_if_deprecated */ false, |
8203 | /* definition_required */ false); | |
ece4ce85 | 8204 | |
d764a8e6 IS |
8205 | if (!protocol) |
8206 | { | |
8207 | protocol = make_node (code); | |
8208 | TYPE_LANG_SLOT_1 (protocol) = make_tree_vec (PROTOCOL_LANG_SLOT_ELTS); | |
6c65299b | 8209 | |
d764a8e6 IS |
8210 | PROTOCOL_NAME (protocol) = name; |
8211 | PROTOCOL_LIST (protocol) = lookup_and_install_protocols (list, /* definition_required */ false); | |
8212 | add_protocol (protocol); | |
8213 | PROTOCOL_DEFINED (protocol) = 1; | |
8214 | PROTOCOL_FORWARD_DECL (protocol) = NULL_TREE; | |
9dee6758 | 8215 | |
d764a8e6 IS |
8216 | check_protocol_recursively (protocol, list); |
8217 | } | |
8218 | else if (! PROTOCOL_DEFINED (protocol)) | |
8219 | { | |
8220 | PROTOCOL_DEFINED (protocol) = 1; | |
8221 | PROTOCOL_LIST (protocol) = lookup_and_install_protocols (list, /* definition_required */ false); | |
6c65299b | 8222 | |
d764a8e6 IS |
8223 | check_protocol_recursively (protocol, list); |
8224 | } | |
8225 | else | |
8226 | { | |
8227 | warning (0, "duplicate declaration for protocol %qE", | |
8228 | name); | |
8229 | } | |
6c65299b | 8230 | |
d764a8e6 | 8231 | if (attributes) |
a878dab7 | 8232 | { |
d764a8e6 IS |
8233 | TYPE_ATTRIBUTES (protocol) = attributes; |
8234 | if (deprecated) | |
8235 | TREE_DEPRECATED (protocol) = 1; | |
a878dab7 | 8236 | } |
6c65299b | 8237 | |
d764a8e6 | 8238 | return protocol; |
6c65299b | 8239 | } |
011d50d9 | 8240 | |
d764a8e6 | 8241 | /* Decay array and function parameters into pointers. */ |
011d50d9 | 8242 | |
d764a8e6 IS |
8243 | static tree |
8244 | objc_decay_parm_type (tree type) | |
6c65299b | 8245 | { |
d764a8e6 IS |
8246 | if (TREE_CODE (type) == ARRAY_TYPE || TREE_CODE (type) == FUNCTION_TYPE) |
8247 | type = build_pointer_type (TREE_CODE (type) == ARRAY_TYPE | |
8248 | ? TREE_TYPE (type) | |
8249 | : type); | |
660820d1 | 8250 | |
d764a8e6 | 8251 | return type; |
6c65299b RS |
8252 | } |
8253 | ||
d764a8e6 | 8254 | static GTY(()) tree objc_parmlist = NULL_TREE; |
660820d1 | 8255 | |
d764a8e6 IS |
8256 | /* Append PARM to a list of formal parameters of a method, making a necessary |
8257 | array-to-pointer adjustment along the way. */ | |
8258 | ||
8259 | void | |
8260 | objc_push_parm (tree parm) | |
660820d1 | 8261 | { |
d764a8e6 | 8262 | tree type; |
660820d1 | 8263 | |
d764a8e6 | 8264 | if (TREE_TYPE (parm) == error_mark_node) |
660820d1 | 8265 | { |
d764a8e6 IS |
8266 | objc_parmlist = chainon (objc_parmlist, parm); |
8267 | return; | |
660820d1 | 8268 | } |
660820d1 | 8269 | |
d764a8e6 IS |
8270 | /* Decay arrays and functions into pointers. */ |
8271 | type = objc_decay_parm_type (TREE_TYPE (parm)); | |
660820d1 | 8272 | |
d764a8e6 IS |
8273 | /* If the parameter type has been decayed, a new PARM_DECL needs to be |
8274 | built as well. */ | |
8275 | if (type != TREE_TYPE (parm)) | |
8276 | parm = build_decl (input_location, PARM_DECL, DECL_NAME (parm), type); | |
660820d1 | 8277 | |
d764a8e6 IS |
8278 | DECL_ARG_TYPE (parm) |
8279 | = lang_hooks.types.type_promotes_to (TREE_TYPE (parm)); | |
660820d1 | 8280 | |
d764a8e6 IS |
8281 | /* Record constancy and volatility. */ |
8282 | c_apply_type_quals_to_decl | |
8283 | ((TYPE_READONLY (TREE_TYPE (parm)) ? TYPE_QUAL_CONST : 0) | |
8284 | | (TYPE_RESTRICT (TREE_TYPE (parm)) ? TYPE_QUAL_RESTRICT : 0) | |
8285 | | (TYPE_VOLATILE (TREE_TYPE (parm)) ? TYPE_QUAL_VOLATILE : 0), parm); | |
660820d1 | 8286 | |
d764a8e6 | 8287 | objc_parmlist = chainon (objc_parmlist, parm); |
660820d1 NP |
8288 | } |
8289 | ||
d764a8e6 IS |
8290 | /* Retrieve the formal parameter list constructed via preceding calls to |
8291 | objc_push_parm(). */ | |
4ce693cd | 8292 | |
d764a8e6 IS |
8293 | #ifdef OBJCPLUS |
8294 | tree | |
a04a722b JM |
8295 | objc_get_parm_info (int have_ellipsis ATTRIBUTE_UNUSED, |
8296 | tree expr ATTRIBUTE_UNUSED) | |
6c65299b | 8297 | { |
d764a8e6 IS |
8298 | tree parm_info = objc_parmlist; |
8299 | objc_parmlist = NULL_TREE; | |
6c65299b | 8300 | |
d764a8e6 | 8301 | return parm_info; |
6c65299b | 8302 | } |
d764a8e6 IS |
8303 | #else |
8304 | struct c_arg_info * | |
a04a722b | 8305 | objc_get_parm_info (int have_ellipsis, tree expr) |
6c65299b | 8306 | { |
d764a8e6 IS |
8307 | tree parm_info = objc_parmlist; |
8308 | struct c_arg_info *arg_info; | |
8309 | /* The C front-end requires an elaborate song and dance at | |
8310 | this point. */ | |
8311 | push_scope (); | |
8312 | declare_parm_level (); | |
8313 | while (parm_info) | |
6c65299b | 8314 | { |
d764a8e6 | 8315 | tree next = DECL_CHAIN (parm_info); |
6c65299b | 8316 | |
d764a8e6 IS |
8317 | DECL_CHAIN (parm_info) = NULL_TREE; |
8318 | parm_info = pushdecl (parm_info); | |
8319 | finish_decl (parm_info, input_location, NULL_TREE, NULL_TREE, NULL_TREE); | |
8320 | parm_info = next; | |
6c65299b | 8321 | } |
a04a722b | 8322 | arg_info = get_parm_info (have_ellipsis, expr); |
d764a8e6 IS |
8323 | pop_scope (); |
8324 | objc_parmlist = NULL_TREE; | |
8325 | return arg_info; | |
6c65299b | 8326 | } |
d764a8e6 | 8327 | #endif |
6c65299b | 8328 | |
d764a8e6 IS |
8329 | /* Synthesize the formal parameters 'id self' and 'SEL _cmd' needed for ObjC |
8330 | method definitions. In the case of instance methods, we can be more | |
8331 | specific as to the type of 'self'. */ | |
6c65299b | 8332 | |
d764a8e6 IS |
8333 | static void |
8334 | synth_self_and_ucmd_args (void) | |
6c65299b | 8335 | { |
d764a8e6 | 8336 | tree self_type; |
6c65299b | 8337 | |
d764a8e6 IS |
8338 | if (objc_method_context |
8339 | && TREE_CODE (objc_method_context) == INSTANCE_METHOD_DECL) | |
8340 | self_type = objc_instance_type; | |
6c65299b | 8341 | else |
d764a8e6 IS |
8342 | /* Really a `struct objc_class *'. However, we allow people to |
8343 | assign to self, which changes its type midstream. */ | |
8344 | self_type = objc_object_type; | |
6c65299b | 8345 | |
d764a8e6 IS |
8346 | /* id self; */ |
8347 | objc_push_parm (build_decl (input_location, | |
8348 | PARM_DECL, self_id, self_type)); | |
ece4ce85 | 8349 | |
d764a8e6 IS |
8350 | /* SEL _cmd; */ |
8351 | objc_push_parm (build_decl (input_location, | |
8352 | PARM_DECL, ucmd_id, objc_selector_type)); | |
6c65299b RS |
8353 | } |
8354 | ||
d764a8e6 IS |
8355 | /* Transform an Objective-C method definition into a static C function |
8356 | definition, synthesizing the first two arguments, "self" and "_cmd", | |
a04a722b JM |
8357 | in the process. EXPR is NULL or an expression that needs to be |
8358 | evaluated for the side effects of array size expressions in the | |
8359 | parameters. */ | |
64ee9490 | 8360 | |
d764a8e6 | 8361 | static void |
a04a722b | 8362 | start_method_def (tree method, tree expr) |
6c65299b | 8363 | { |
d764a8e6 IS |
8364 | tree parmlist; |
8365 | #ifdef OBJCPLUS | |
8366 | tree parm_info; | |
8367 | #else | |
8368 | struct c_arg_info *parm_info; | |
8369 | #endif | |
8370 | int have_ellipsis = 0; | |
6c65299b | 8371 | |
d764a8e6 IS |
8372 | /* If we are defining a "dealloc" method in a non-root class, we |
8373 | will need to check if a [super dealloc] is missing, and warn if | |
8374 | it is. */ | |
8375 | if(CLASS_SUPER_NAME (objc_implementation_context) | |
8376 | && !strcmp ("dealloc", IDENTIFIER_POINTER (METHOD_SEL_NAME (method)))) | |
8377 | should_call_super_dealloc = 1; | |
8378 | else | |
8379 | should_call_super_dealloc = 0; | |
264fa2db | 8380 | |
d764a8e6 IS |
8381 | /* Required to implement _msgSuper. */ |
8382 | objc_method_context = method; | |
8383 | UOBJC_SUPER_decl = NULL_TREE; | |
6c65299b | 8384 | |
d764a8e6 IS |
8385 | /* Generate prototype declarations for arguments..."new-style". */ |
8386 | synth_self_and_ucmd_args (); | |
e31c7eec | 8387 | |
d764a8e6 IS |
8388 | /* Generate argument declarations if a keyword_decl. */ |
8389 | parmlist = METHOD_SEL_ARGS (method); | |
8390 | while (parmlist) | |
8391 | { | |
8392 | /* parmlist is a KEYWORD_DECL. */ | |
8393 | tree type = TREE_VALUE (TREE_TYPE (parmlist)); | |
8394 | tree parm; | |
264fa2db | 8395 | |
d764a8e6 IS |
8396 | parm = build_decl (input_location, |
8397 | PARM_DECL, KEYWORD_ARG_NAME (parmlist), type); | |
8398 | decl_attributes (&parm, DECL_ATTRIBUTES (parmlist), 0); | |
8399 | objc_push_parm (parm); | |
8400 | parmlist = DECL_CHAIN (parmlist); | |
8401 | } | |
6c65299b | 8402 | |
d764a8e6 IS |
8403 | if (METHOD_ADD_ARGS (method)) |
8404 | { | |
8405 | tree akey; | |
8406 | ||
8407 | for (akey = TREE_CHAIN (METHOD_ADD_ARGS (method)); | |
8408 | akey; akey = TREE_CHAIN (akey)) | |
e31c7eec | 8409 | { |
d764a8e6 | 8410 | objc_push_parm (TREE_VALUE (akey)); |
e31c7eec TW |
8411 | } |
8412 | ||
d764a8e6 IS |
8413 | if (METHOD_ADD_ARGS_ELLIPSIS_P (method)) |
8414 | have_ellipsis = 1; | |
6c65299b | 8415 | } |
6c65299b | 8416 | |
a04a722b | 8417 | parm_info = objc_get_parm_info (have_ellipsis, expr); |
6c65299b | 8418 | |
d764a8e6 IS |
8419 | really_start_method (objc_method_context, parm_info); |
8420 | } | |
96e5d745 | 8421 | |
d764a8e6 IS |
8422 | /* Return 1 if TYPE1 is equivalent to TYPE2 for purposes of method |
8423 | overloading. */ | |
8424 | static int | |
8425 | objc_types_are_equivalent (tree type1, tree type2) | |
81ff723b | 8426 | { |
d764a8e6 IS |
8427 | if (type1 == type2) |
8428 | return 1; | |
81ff723b | 8429 | |
d764a8e6 IS |
8430 | /* Strip away indirections. */ |
8431 | while ((TREE_CODE (type1) == ARRAY_TYPE || TREE_CODE (type1) == POINTER_TYPE) | |
8432 | && (TREE_CODE (type1) == TREE_CODE (type2))) | |
8433 | type1 = TREE_TYPE (type1), type2 = TREE_TYPE (type2); | |
8434 | if (TYPE_MAIN_VARIANT (type1) != TYPE_MAIN_VARIANT (type2)) | |
8435 | return 0; | |
81ff723b | 8436 | |
d764a8e6 IS |
8437 | /* Compare the protocol lists. */ |
8438 | type1 = (TYPE_HAS_OBJC_INFO (type1) | |
8439 | ? TYPE_OBJC_PROTOCOL_LIST (type1) | |
8440 | : NULL_TREE); | |
8441 | type2 = (TYPE_HAS_OBJC_INFO (type2) | |
8442 | ? TYPE_OBJC_PROTOCOL_LIST (type2) | |
8443 | : NULL_TREE); | |
223706ad | 8444 | |
d764a8e6 IS |
8445 | /* If there are no protocols (most common case), the types are |
8446 | identical. */ | |
8447 | if (type1 == NULL_TREE && type2 == NULL_TREE) | |
8448 | return 1; | |
944fb799 | 8449 | |
d764a8e6 IS |
8450 | /* If one has protocols, and the other one hasn't, they are not |
8451 | identical. */ | |
8452 | if ((type1 == NULL_TREE && type2 != NULL_TREE) | |
8453 | || (type1 != NULL_TREE && type2 == NULL_TREE)) | |
8454 | return 0; | |
223706ad | 8455 | else |
223706ad | 8456 | { |
d764a8e6 IS |
8457 | /* Else, both have protocols, and we need to do the full |
8458 | comparison. It is possible that either type1 or type2 | |
8459 | contain some duplicate protocols in the list, so we can't | |
8460 | even just compare list_length as a first check. */ | |
8461 | tree t; | |
223706ad | 8462 | |
d764a8e6 IS |
8463 | for (t = type2; t; t = TREE_CHAIN (t)) |
8464 | if (!lookup_protocol_in_reflist (type1, TREE_VALUE (t))) | |
8465 | return 0; | |
944fb799 | 8466 | |
d764a8e6 IS |
8467 | for (t = type1; t; t = TREE_CHAIN (t)) |
8468 | if (!lookup_protocol_in_reflist (type2, TREE_VALUE (t))) | |
8469 | return 0; | |
944fb799 | 8470 | |
d764a8e6 | 8471 | return 1; |
223706ad | 8472 | } |
d764a8e6 | 8473 | } |
223706ad | 8474 | |
d764a8e6 | 8475 | /* Return 1 if TYPE1 has the same size and alignment as TYPE2. */ |
6c65299b | 8476 | |
d764a8e6 IS |
8477 | static int |
8478 | objc_types_share_size_and_alignment (tree type1, tree type2) | |
8479 | { | |
8480 | return (simple_cst_equal (TYPE_SIZE (type1), TYPE_SIZE (type2)) | |
8481 | && TYPE_ALIGN (type1) == TYPE_ALIGN (type2)); | |
8482 | } | |
81ff723b | 8483 | |
d764a8e6 IS |
8484 | /* Return 1 if PROTO1 is equivalent to PROTO2 |
8485 | for purposes of method overloading. Ordinarily, the type signatures | |
8486 | should match up exactly, unless STRICT is zero, in which case we | |
8487 | shall allow differences in which the size and alignment of a type | |
8488 | is the same. */ | |
81ff723b | 8489 | |
d764a8e6 IS |
8490 | static int |
8491 | comp_proto_with_proto (tree proto1, tree proto2, int strict) | |
8492 | { | |
dc2dc512 NP |
8493 | tree type1, type2; |
8494 | ||
d764a8e6 IS |
8495 | /* The following test is needed in case there are hashing |
8496 | collisions. */ | |
8497 | if (METHOD_SEL_NAME (proto1) != METHOD_SEL_NAME (proto2)) | |
8498 | return 0; | |
81ff723b | 8499 | |
d764a8e6 IS |
8500 | /* Compare return types. */ |
8501 | type1 = TREE_VALUE (TREE_TYPE (proto1)); | |
8502 | type2 = TREE_VALUE (TREE_TYPE (proto2)); | |
38b9c8c3 | 8503 | |
d764a8e6 IS |
8504 | if (!objc_types_are_equivalent (type1, type2) |
8505 | && (strict || !objc_types_share_size_and_alignment (type1, type2))) | |
8506 | return 0; | |
8507 | ||
8508 | /* Compare argument types. */ | |
38b9c8c3 | 8509 | |
dc2dc512 NP |
8510 | /* The first argument (objc_object_type) is always the same, no need |
8511 | to compare. */ | |
8512 | ||
8513 | /* The second argument (objc_selector_type) is always the same, no | |
8514 | need to compare. */ | |
8515 | ||
8516 | /* Compare the other arguments. */ | |
8517 | { | |
8518 | tree arg1, arg2; | |
8519 | ||
8520 | /* Compare METHOD_SEL_ARGS. */ | |
8521 | for (arg1 = METHOD_SEL_ARGS (proto1), arg2 = METHOD_SEL_ARGS (proto2); | |
8522 | arg1 && arg2; | |
8523 | arg1 = DECL_CHAIN (arg1), arg2 = DECL_CHAIN (arg2)) | |
8524 | { | |
8525 | type1 = TREE_VALUE (TREE_TYPE (arg1)); | |
8526 | type2 = TREE_VALUE (TREE_TYPE (arg2)); | |
944fb799 | 8527 | |
dc2dc512 NP |
8528 | /* FIXME: Do we need to decay argument types to compare them ? */ |
8529 | type1 = objc_decay_parm_type (type1); | |
8530 | type2 = objc_decay_parm_type (type2); | |
944fb799 | 8531 | |
dc2dc512 NP |
8532 | if (!objc_types_are_equivalent (type1, type2) |
8533 | && (strict || !objc_types_share_size_and_alignment (type1, type2))) | |
8534 | return 0; | |
8535 | } | |
944fb799 | 8536 | |
dc2dc512 NP |
8537 | /* The loop ends when arg1 or arg2 are NULL. Make sure they are |
8538 | both NULL. */ | |
8539 | if (arg1 != arg2) | |
8540 | return 0; | |
8541 | ||
8542 | /* Compare METHOD_ADD_ARGS. */ | |
8543 | if ((METHOD_ADD_ARGS (proto1) && !METHOD_ADD_ARGS (proto2)) | |
8544 | || (METHOD_ADD_ARGS (proto2) && !METHOD_ADD_ARGS (proto1))) | |
8545 | return 0; | |
8546 | ||
8547 | if (METHOD_ADD_ARGS (proto1)) | |
8548 | { | |
8549 | for (arg1 = TREE_CHAIN (METHOD_ADD_ARGS (proto1)), arg2 = TREE_CHAIN (METHOD_ADD_ARGS (proto2)); | |
8550 | arg1 && arg2; | |
8551 | arg1 = TREE_CHAIN (arg1), arg2 = TREE_CHAIN (arg2)) | |
8552 | { | |
8553 | type1 = TREE_TYPE (TREE_VALUE (arg1)); | |
8554 | type2 = TREE_TYPE (TREE_VALUE (arg2)); | |
944fb799 | 8555 | |
dc2dc512 NP |
8556 | /* FIXME: Do we need to decay argument types to compare them ? */ |
8557 | type1 = objc_decay_parm_type (type1); | |
8558 | type2 = objc_decay_parm_type (type2); | |
944fb799 | 8559 | |
dc2dc512 NP |
8560 | if (!objc_types_are_equivalent (type1, type2) |
8561 | && (strict || !objc_types_share_size_and_alignment (type1, type2))) | |
8562 | return 0; | |
8563 | } | |
8564 | } | |
944fb799 | 8565 | |
dc2dc512 NP |
8566 | /* The loop ends when arg1 or arg2 are NULL. Make sure they are |
8567 | both NULL. */ | |
8568 | if (arg1 != arg2) | |
8569 | return 0; | |
8570 | ||
8571 | /* Compare METHOD_ADD_ARGS_ELLIPSIS_P. */ | |
8572 | if (METHOD_ADD_ARGS_ELLIPSIS_P (proto1) != METHOD_ADD_ARGS_ELLIPSIS_P (proto2)) | |
8573 | return 0; | |
8574 | } | |
8575 | ||
8576 | /* Success. */ | |
8577 | return 1; | |
6c65299b RS |
8578 | } |
8579 | ||
d764a8e6 IS |
8580 | /* This routine returns true if TYPE is a valid objc object type, |
8581 | suitable for messaging; false otherwise. If 'accept_class' is | |
8582 | 'true', then a Class object is considered valid for messaging and | |
8583 | 'true' is returned if 'type' refers to a Class. If 'accept_class' | |
8584 | is 'false', then a Class object is not considered valid for | |
8585 | messaging and 'false' is returned in that case. */ | |
8586 | ||
8587 | static bool | |
8588 | objc_type_valid_for_messaging (tree type, bool accept_classes) | |
6c65299b | 8589 | { |
d764a8e6 IS |
8590 | if (!POINTER_TYPE_P (type)) |
8591 | return false; | |
51900510 | 8592 | |
d764a8e6 IS |
8593 | /* Remove the pointer indirection; don't remove more than one |
8594 | otherwise we'd consider "NSObject **" a valid type for messaging, | |
8595 | which it isn't. */ | |
8596 | type = TREE_TYPE (type); | |
6c65299b | 8597 | |
d764a8e6 IS |
8598 | if (TREE_CODE (type) != RECORD_TYPE) |
8599 | return false; | |
e31c7eec | 8600 | |
d764a8e6 IS |
8601 | if (objc_is_object_id (type)) |
8602 | return true; | |
e31c7eec | 8603 | |
d764a8e6 IS |
8604 | if (objc_is_class_id (type)) |
8605 | return accept_classes; | |
6c65299b | 8606 | |
d764a8e6 IS |
8607 | if (TYPE_HAS_OBJC_INFO (type)) |
8608 | return true; | |
6c65299b | 8609 | |
d764a8e6 IS |
8610 | return false; |
8611 | } | |
264fa2db | 8612 | |
d764a8e6 IS |
8613 | void |
8614 | objc_start_function (tree name, tree type, tree attrs, | |
8615 | #ifdef OBJCPLUS | |
8616 | tree params | |
8617 | #else | |
8618 | struct c_arg_info *params | |
8619 | #endif | |
8620 | ) | |
8621 | { | |
8622 | tree fndecl = build_decl (input_location, | |
8623 | FUNCTION_DECL, name, type); | |
6c65299b | 8624 | |
d764a8e6 IS |
8625 | #ifdef OBJCPLUS |
8626 | DECL_ARGUMENTS (fndecl) = params; | |
8627 | DECL_INITIAL (fndecl) = error_mark_node; | |
8628 | DECL_EXTERNAL (fndecl) = 0; | |
8629 | TREE_STATIC (fndecl) = 1; | |
8630 | retrofit_lang_decl (fndecl); | |
8631 | cplus_decl_attributes (&fndecl, attrs, 0); | |
8632 | start_preparsed_function (fndecl, attrs, /*flags=*/SF_DEFAULT); | |
8633 | #else | |
8634 | current_function_returns_value = 0; /* Assume, until we see it does. */ | |
8635 | current_function_returns_null = 0; | |
8636 | decl_attributes (&fndecl, attrs, 0); | |
8637 | announce_function (fndecl); | |
8638 | DECL_INITIAL (fndecl) = error_mark_node; | |
8639 | DECL_EXTERNAL (fndecl) = 0; | |
8640 | TREE_STATIC (fndecl) = 1; | |
8641 | current_function_decl = pushdecl (fndecl); | |
8642 | push_scope (); | |
8643 | declare_parm_level (); | |
8644 | DECL_RESULT (current_function_decl) | |
8645 | = build_decl (input_location, | |
8646 | RESULT_DECL, NULL_TREE, | |
8647 | TREE_TYPE (TREE_TYPE (current_function_decl))); | |
8648 | DECL_ARTIFICIAL (DECL_RESULT (current_function_decl)) = 1; | |
8649 | DECL_IGNORED_P (DECL_RESULT (current_function_decl)) = 1; | |
8650 | start_fname_decls (); | |
8651 | store_parm_decls_from (params); | |
8652 | #endif | |
6408ef33 | 8653 | |
d764a8e6 | 8654 | TREE_USED (current_function_decl) = 1; |
6c65299b | 8655 | } |
8f07a2aa | 8656 | |
d764a8e6 IS |
8657 | /* - Generate an identifier for the function. the format is "_n_cls", |
8658 | where 1 <= n <= nMethods, and cls is the name the implementation we | |
8659 | are processing. | |
8660 | - Install the return type from the method declaration. | |
8661 | - If we have a prototype, check for type consistency. */ | |
8662 | ||
8663 | static void | |
8664 | really_start_method (tree method, | |
8665 | #ifdef OBJCPLUS | |
8666 | tree parmlist | |
8667 | #else | |
8668 | struct c_arg_info *parmlist | |
8669 | #endif | |
8670 | ) | |
6c65299b | 8671 | { |
d764a8e6 IS |
8672 | tree ret_type, meth_type; |
8673 | tree method_id; | |
8674 | const char *sel_name, *class_name, *cat_name; | |
8675 | char *buf; | |
6c65299b | 8676 | |
d764a8e6 IS |
8677 | /* Synth the storage class & assemble the return type. */ |
8678 | ret_type = TREE_VALUE (TREE_TYPE (method)); | |
e31c7eec | 8679 | |
d764a8e6 IS |
8680 | sel_name = IDENTIFIER_POINTER (METHOD_SEL_NAME (method)); |
8681 | class_name = IDENTIFIER_POINTER (CLASS_NAME (objc_implementation_context)); | |
8682 | cat_name = ((TREE_CODE (objc_implementation_context) | |
8683 | == CLASS_IMPLEMENTATION_TYPE) | |
8684 | ? NULL | |
8685 | : IDENTIFIER_POINTER (CLASS_SUPER_NAME (objc_implementation_context))); | |
8686 | method_slot++; | |
e31c7eec | 8687 | |
d764a8e6 IS |
8688 | /* Make sure this is big enough for any plausible method label. */ |
8689 | buf = (char *) alloca (50 + strlen (sel_name) + strlen (class_name) | |
8690 | + (cat_name ? strlen (cat_name) : 0)); | |
6c65299b | 8691 | |
d764a8e6 IS |
8692 | OBJC_GEN_METHOD_LABEL (buf, TREE_CODE (method) == INSTANCE_METHOD_DECL, |
8693 | class_name, cat_name, sel_name, method_slot); | |
8694 | ||
8695 | method_id = get_identifier (buf); | |
d11dd684 ZL |
8696 | |
8697 | #ifdef OBJCPLUS | |
d764a8e6 IS |
8698 | /* Objective-C methods cannot be overloaded, so we don't need |
8699 | the type encoding appended. It looks bad anyway... */ | |
8700 | push_lang_context (lang_name_c); | |
d11dd684 ZL |
8701 | #endif |
8702 | ||
d764a8e6 IS |
8703 | meth_type |
8704 | = build_function_type (ret_type, | |
8705 | get_arg_type_list (method, METHOD_DEF, 0)); | |
8706 | objc_start_function (method_id, meth_type, NULL_TREE, parmlist); | |
b2072208 | 8707 | |
d764a8e6 IS |
8708 | /* Set self_decl from the first argument. */ |
8709 | self_decl = DECL_ARGUMENTS (current_function_decl); | |
6c65299b | 8710 | |
d764a8e6 IS |
8711 | /* Suppress unused warnings. */ |
8712 | TREE_USED (self_decl) = 1; | |
8713 | DECL_READ_P (self_decl) = 1; | |
8714 | TREE_USED (DECL_CHAIN (self_decl)) = 1; | |
8715 | DECL_READ_P (DECL_CHAIN (self_decl)) = 1; | |
8716 | #ifdef OBJCPLUS | |
8717 | pop_lang_context (); | |
8718 | #endif | |
38b9c8c3 | 8719 | |
d764a8e6 | 8720 | METHOD_DEFINITION (method) = current_function_decl; |
6c65299b | 8721 | |
d764a8e6 | 8722 | /* Check consistency...start_function, pushdecl, duplicate_decls. */ |
6c65299b | 8723 | |
d764a8e6 IS |
8724 | if (implementation_template != objc_implementation_context) |
8725 | { | |
8726 | tree proto | |
8727 | = lookup_method_static (implementation_template, | |
8728 | METHOD_SEL_NAME (method), | |
8729 | ((TREE_CODE (method) == CLASS_METHOD_DECL) | |
8730 | | OBJC_LOOKUP_NO_SUPER)); | |
61c627ed | 8731 | |
d764a8e6 IS |
8732 | if (proto) |
8733 | { | |
8734 | if (!comp_proto_with_proto (method, proto, 1)) | |
8735 | { | |
8736 | bool type = TREE_CODE (method) == INSTANCE_METHOD_DECL; | |
d11dd684 | 8737 | |
d764a8e6 IS |
8738 | warning_at (DECL_SOURCE_LOCATION (method), 0, |
8739 | "conflicting types for %<%c%s%>", | |
8740 | (type ? '-' : '+'), | |
8741 | identifier_to_locale (gen_method_decl (method))); | |
8742 | inform (DECL_SOURCE_LOCATION (proto), | |
8743 | "previous declaration of %<%c%s%>", | |
8744 | (type ? '-' : '+'), | |
8745 | identifier_to_locale (gen_method_decl (proto))); | |
8746 | } | |
8747 | else | |
8748 | { | |
8749 | /* If the method in the @interface was deprecated, mark | |
8750 | the implemented method as deprecated too. It should | |
8751 | never be used for messaging (when the deprecation | |
8752 | warnings are produced), but just in case. */ | |
8753 | if (TREE_DEPRECATED (proto)) | |
8754 | TREE_DEPRECATED (method) = 1; | |
d11dd684 | 8755 | |
d764a8e6 IS |
8756 | /* If the method in the @interface was marked as |
8757 | 'noreturn', mark the function implementing the method | |
8758 | as 'noreturn' too. */ | |
8759 | TREE_THIS_VOLATILE (current_function_decl) = TREE_THIS_VOLATILE (proto); | |
8760 | } | |
8761 | } | |
8762 | else | |
8763 | { | |
8764 | /* We have a method @implementation even though we did not | |
8765 | see a corresponding @interface declaration (which is allowed | |
8766 | by Objective-C rules). Go ahead and place the method in | |
8767 | the @interface anyway, so that message dispatch lookups | |
8768 | will see it. */ | |
8769 | tree interface = implementation_template; | |
e31c7eec | 8770 | |
d764a8e6 IS |
8771 | if (TREE_CODE (objc_implementation_context) |
8772 | == CATEGORY_IMPLEMENTATION_TYPE) | |
8773 | interface = lookup_category | |
8774 | (interface, | |
8775 | CLASS_SUPER_NAME (objc_implementation_context)); | |
64ee9490 | 8776 | |
d764a8e6 IS |
8777 | if (interface) |
8778 | objc_add_method (interface, copy_node (method), | |
944fb799 | 8779 | TREE_CODE (method) == CLASS_METHOD_DECL, |
d764a8e6 | 8780 | /* is_optional= */ false); |
6c65299b | 8781 | } |
6c65299b | 8782 | } |
6c65299b | 8783 | } |
4ca5d2a7 | 8784 | |
d764a8e6 | 8785 | static void *UOBJC_SUPER_scope = 0; |
6c65299b | 8786 | |
d764a8e6 IS |
8787 | /* _n_Method (id self, SEL sel, ...) |
8788 | { | |
8789 | struct objc_super _S; | |
8790 | _msgSuper ((_S.self = self, _S.class = _cls, &_S), ...); | |
8791 | } */ | |
8792 | ||
8793 | static tree | |
8794 | get_super_receiver (void) | |
6c65299b | 8795 | { |
d764a8e6 IS |
8796 | if (objc_method_context) |
8797 | { | |
8798 | tree super_expr, super_expr_list, class_expr; | |
8799 | bool inst_meth; | |
8800 | if (!UOBJC_SUPER_decl) | |
8801 | { | |
8802 | UOBJC_SUPER_decl = build_decl (input_location, | |
8803 | VAR_DECL, get_identifier (TAG_SUPER), | |
8804 | objc_super_template); | |
8805 | /* This prevents `unused variable' warnings when compiling with -Wall. */ | |
8806 | TREE_USED (UOBJC_SUPER_decl) = 1; | |
8807 | DECL_READ_P (UOBJC_SUPER_decl) = 1; | |
8808 | lang_hooks.decls.pushdecl (UOBJC_SUPER_decl); | |
8809 | finish_decl (UOBJC_SUPER_decl, input_location, NULL_TREE, NULL_TREE, | |
944fb799 | 8810 | NULL_TREE); |
d764a8e6 IS |
8811 | UOBJC_SUPER_scope = objc_get_current_scope (); |
8812 | } | |
4ca5d2a7 | 8813 | |
d764a8e6 IS |
8814 | /* Set receiver to self. */ |
8815 | super_expr = objc_build_component_ref (UOBJC_SUPER_decl, self_id); | |
8816 | super_expr = build_modify_expr (input_location, super_expr, NULL_TREE, | |
8817 | NOP_EXPR, input_location, self_decl, | |
8818 | NULL_TREE); | |
8819 | super_expr_list = super_expr; | |
6c65299b | 8820 | |
d764a8e6 IS |
8821 | /* Set class to begin searching. */ |
8822 | /* Get the ident for the superclass class field & build a ref to it. | |
8823 | ??? maybe we should just name the field the same for all runtimes. */ | |
8824 | super_expr = (*runtime.super_superclassfield_ident) (); | |
8825 | super_expr = objc_build_component_ref (UOBJC_SUPER_decl, super_expr); | |
46a88c12 | 8826 | |
d764a8e6 IS |
8827 | gcc_assert (imp_list->imp_context == objc_implementation_context |
8828 | && imp_list->imp_template == implementation_template); | |
8829 | inst_meth = (TREE_CODE (objc_method_context) == INSTANCE_METHOD_DECL); | |
8830 | ||
8831 | if (TREE_CODE (objc_implementation_context) == CLASS_IMPLEMENTATION_TYPE) | |
944fb799 | 8832 | class_expr = (*runtime.get_class_super_ref) (input_location, |
d764a8e6 IS |
8833 | imp_list, inst_meth); |
8834 | else | |
8835 | /* We have a category. */ | |
6c65299b | 8836 | { |
d764a8e6 IS |
8837 | tree super_name = CLASS_SUPER_NAME (imp_list->imp_template); |
8838 | tree super_class; | |
8839 | ||
8840 | /* Barf if super used in a category of a root object. */ | |
8841 | if (!super_name) | |
4ca5d2a7 | 8842 | { |
d764a8e6 IS |
8843 | error ("no super class declared in interface for %qE", |
8844 | CLASS_NAME (imp_list->imp_template)); | |
8845 | return error_mark_node; | |
8846 | } | |
4ca5d2a7 | 8847 | |
944fb799 | 8848 | super_class = (*runtime.get_category_super_ref) (input_location, |
d764a8e6 | 8849 | imp_list, inst_meth); |
944fb799 | 8850 | class_expr = build_c_cast (input_location, |
d764a8e6 IS |
8851 | TREE_TYPE (super_expr), super_class); |
8852 | } | |
4ca5d2a7 | 8853 | |
944fb799 | 8854 | super_expr = build_modify_expr (input_location, super_expr, NULL_TREE, |
d764a8e6 IS |
8855 | NOP_EXPR, |
8856 | input_location, class_expr, NULL_TREE); | |
4ca5d2a7 | 8857 | |
944fb799 | 8858 | super_expr_list = build_compound_expr (input_location, |
d764a8e6 | 8859 | super_expr_list, super_expr); |
4ca5d2a7 | 8860 | |
944fb799 | 8861 | super_expr = build_unary_op (input_location, |
d764a8e6 IS |
8862 | ADDR_EXPR, UOBJC_SUPER_decl, 0); |
8863 | super_expr_list = build_compound_expr (input_location, | |
8864 | super_expr_list, super_expr); | |
4ca5d2a7 | 8865 | |
d764a8e6 IS |
8866 | return super_expr_list; |
8867 | } | |
8868 | else | |
8869 | { | |
8870 | error ("[super ...] must appear in a method context"); | |
8871 | return error_mark_node; | |
6c65299b | 8872 | } |
e31c7eec TW |
8873 | } |
8874 | ||
d764a8e6 IS |
8875 | /* When exiting a scope, sever links to a 'super' declaration (if any) |
8876 | therein contained. */ | |
f2e6e530 | 8877 | |
d764a8e6 IS |
8878 | void |
8879 | objc_clear_super_receiver (void) | |
e31c7eec | 8880 | { |
d764a8e6 | 8881 | if (objc_method_context |
d4c433f9 NP |
8882 | && UOBJC_SUPER_scope == objc_get_current_scope ()) |
8883 | { | |
8884 | UOBJC_SUPER_decl = 0; | |
8885 | UOBJC_SUPER_scope = 0; | |
8886 | } | |
d764a8e6 | 8887 | } |
51900510 | 8888 | |
d764a8e6 IS |
8889 | void |
8890 | objc_finish_method_definition (tree fndecl) | |
8891 | { | |
8892 | /* We cannot validly inline ObjC methods, at least not without a language | |
8893 | extension to declare that a method need not be dynamically | |
8894 | dispatched, so suppress all thoughts of doing so. */ | |
8895 | DECL_UNINLINABLE (fndecl) = 1; | |
51900510 | 8896 | |
d764a8e6 IS |
8897 | #ifndef OBJCPLUS |
8898 | /* The C++ front-end will have called finish_function() for us. */ | |
8899 | finish_function (); | |
8900 | #endif | |
8901 | ||
8902 | METHOD_ENCODING (objc_method_context) | |
8903 | = encode_method_prototype (objc_method_context); | |
8904 | ||
8905 | /* Required to implement _msgSuper. This must be done AFTER finish_function, | |
8906 | since the optimizer may find "may be used before set" errors. */ | |
8907 | objc_method_context = NULL_TREE; | |
8908 | ||
8909 | if (should_call_super_dealloc) | |
8910 | warning (0, "method possibly missing a [super dealloc] call"); | |
e31c7eec TW |
8911 | } |
8912 | ||
d764a8e6 IS |
8913 | /* Given a tree DECL node, produce a printable description of it in the given |
8914 | buffer, overwriting the buffer. */ | |
143dc646 | 8915 | |
d764a8e6 IS |
8916 | static char * |
8917 | gen_declaration (tree decl) | |
143dc646 | 8918 | { |
d764a8e6 | 8919 | errbuf[0] = '\0'; |
143dc646 | 8920 | |
d764a8e6 | 8921 | if (DECL_P (decl)) |
143dc646 | 8922 | { |
d764a8e6 | 8923 | gen_type_name_0 (TREE_TYPE (decl)); |
46a88c12 | 8924 | |
d764a8e6 | 8925 | if (DECL_NAME (decl)) |
143dc646 | 8926 | { |
d764a8e6 IS |
8927 | if (!POINTER_TYPE_P (TREE_TYPE (decl))) |
8928 | strcat (errbuf, " "); | |
143dc646 | 8929 | |
d764a8e6 | 8930 | strcat (errbuf, IDENTIFIER_POINTER (DECL_NAME (decl))); |
143dc646 KKT |
8931 | } |
8932 | ||
d764a8e6 IS |
8933 | if (DECL_INITIAL (decl) |
8934 | && TREE_CODE (DECL_INITIAL (decl)) == INTEGER_CST) | |
8935 | sprintf (errbuf + strlen (errbuf), ": " HOST_WIDE_INT_PRINT_DEC, | |
8936 | TREE_INT_CST_LOW (DECL_INITIAL (decl))); | |
143dc646 | 8937 | } |
d764a8e6 IS |
8938 | |
8939 | return errbuf; | |
143dc646 KKT |
8940 | } |
8941 | ||
d764a8e6 IS |
8942 | /* Given a tree TYPE node, produce a printable description of it in the given |
8943 | buffer, overwriting the buffer. */ | |
011d50d9 | 8944 | |
d764a8e6 IS |
8945 | static char * |
8946 | gen_type_name_0 (tree type) | |
e31c7eec | 8947 | { |
d764a8e6 IS |
8948 | tree orig = type, proto; |
8949 | ||
8950 | if (TYPE_P (type) && TYPE_NAME (type)) | |
8951 | type = TYPE_NAME (type); | |
8952 | else if (POINTER_TYPE_P (type) || TREE_CODE (type) == ARRAY_TYPE) | |
e31c7eec | 8953 | { |
d764a8e6 | 8954 | tree inner = TREE_TYPE (type); |
e31c7eec | 8955 | |
d764a8e6 IS |
8956 | while (TREE_CODE (inner) == ARRAY_TYPE) |
8957 | inner = TREE_TYPE (inner); | |
e31c7eec | 8958 | |
d764a8e6 | 8959 | gen_type_name_0 (inner); |
011d50d9 | 8960 | |
d764a8e6 IS |
8961 | if (!POINTER_TYPE_P (inner)) |
8962 | strcat (errbuf, " "); | |
ad074d60 | 8963 | |
d764a8e6 IS |
8964 | if (POINTER_TYPE_P (type)) |
8965 | strcat (errbuf, "*"); | |
8966 | else | |
8967 | while (type != inner) | |
8968 | { | |
8969 | strcat (errbuf, "["); | |
f2e6e530 | 8970 | |
d764a8e6 IS |
8971 | if (TYPE_DOMAIN (type)) |
8972 | { | |
8973 | char sz[20]; | |
011d50d9 | 8974 | |
d764a8e6 IS |
8975 | sprintf (sz, HOST_WIDE_INT_PRINT_DEC, |
8976 | (TREE_INT_CST_LOW | |
8977 | (TYPE_MAX_VALUE (TYPE_DOMAIN (type))) + 1)); | |
8978 | strcat (errbuf, sz); | |
8979 | } | |
011d50d9 | 8980 | |
d764a8e6 IS |
8981 | strcat (errbuf, "]"); |
8982 | type = TREE_TYPE (type); | |
8983 | } | |
f2e6e530 | 8984 | |
d764a8e6 | 8985 | goto exit_function; |
f2e6e530 | 8986 | } |
6c65299b | 8987 | |
d764a8e6 IS |
8988 | if (TREE_CODE (type) == TYPE_DECL && DECL_NAME (type)) |
8989 | type = DECL_NAME (type); | |
264fa2db | 8990 | |
d764a8e6 | 8991 | strcat (errbuf, TREE_CODE (type) == IDENTIFIER_NODE |
944fb799 | 8992 | ? IDENTIFIER_POINTER (type) |
d764a8e6 IS |
8993 | : ""); |
8994 | ||
8995 | /* For 'id' and 'Class', adopted protocols are stored in the pointee. */ | |
8996 | if (objc_is_id (orig)) | |
8997 | orig = TREE_TYPE (orig); | |
8998 | ||
8999 | proto = TYPE_HAS_OBJC_INFO (orig) ? TYPE_OBJC_PROTOCOL_LIST (orig) : NULL_TREE; | |
9000 | ||
9001 | if (proto) | |
e804281e | 9002 | { |
d764a8e6 IS |
9003 | strcat (errbuf, " <"); |
9004 | ||
9005 | while (proto) { | |
9006 | strcat (errbuf, | |
9007 | IDENTIFIER_POINTER (PROTOCOL_NAME (TREE_VALUE (proto)))); | |
9008 | proto = TREE_CHAIN (proto); | |
9009 | strcat (errbuf, proto ? ", " : ">"); | |
9010 | } | |
e804281e SS |
9011 | } |
9012 | ||
d764a8e6 IS |
9013 | exit_function: |
9014 | return errbuf; | |
9015 | } | |
9016 | ||
9017 | static char * | |
9018 | gen_type_name (tree type) | |
9019 | { | |
9020 | errbuf[0] = '\0'; | |
9021 | ||
9022 | return gen_type_name_0 (type); | |
9023 | } | |
9024 | ||
9025 | /* Given a method tree, put a printable description into the given | |
9026 | buffer (overwriting) and return a pointer to the buffer. */ | |
9027 | ||
9028 | static char * | |
9029 | gen_method_decl (tree method) | |
9030 | { | |
9031 | tree chain; | |
9032 | ||
9033 | strcpy (errbuf, "("); /* NB: Do _not_ call strcat() here. */ | |
9034 | gen_type_name_0 (TREE_VALUE (TREE_TYPE (method))); | |
9035 | strcat (errbuf, ")"); | |
9036 | chain = METHOD_SEL_ARGS (method); | |
9037 | ||
9038 | if (chain) | |
ec3e9f82 | 9039 | { |
d764a8e6 IS |
9040 | /* We have a chain of keyword_decls. */ |
9041 | do | |
9042 | { | |
9043 | if (KEYWORD_KEY_NAME (chain)) | |
9044 | strcat (errbuf, IDENTIFIER_POINTER (KEYWORD_KEY_NAME (chain))); | |
9045 | ||
9046 | strcat (errbuf, ":("); | |
9047 | gen_type_name_0 (TREE_VALUE (TREE_TYPE (chain))); | |
9048 | strcat (errbuf, ")"); | |
9049 | ||
9050 | strcat (errbuf, IDENTIFIER_POINTER (KEYWORD_ARG_NAME (chain))); | |
9051 | if ((chain = DECL_CHAIN (chain))) | |
9052 | strcat (errbuf, " "); | |
9053 | } | |
9054 | while (chain); | |
9055 | ||
9056 | if (METHOD_ADD_ARGS (method)) | |
9057 | { | |
9058 | chain = TREE_CHAIN (METHOD_ADD_ARGS (method)); | |
9059 | ||
9060 | /* Know we have a chain of parm_decls. */ | |
9061 | while (chain) | |
9062 | { | |
9063 | strcat (errbuf, ", "); | |
9064 | gen_type_name_0 (TREE_TYPE (TREE_VALUE (chain))); | |
9065 | chain = TREE_CHAIN (chain); | |
9066 | } | |
9067 | ||
9068 | if (METHOD_ADD_ARGS_ELLIPSIS_P (method)) | |
9069 | strcat (errbuf, ", ..."); | |
9070 | } | |
ec3e9f82 | 9071 | } |
6c65299b | 9072 | |
d764a8e6 IS |
9073 | else |
9074 | /* We have a unary selector. */ | |
9075 | strcat (errbuf, IDENTIFIER_POINTER (METHOD_SEL_NAME (method))); | |
9076 | ||
9077 | return errbuf; | |
9078 | } | |
9079 | \f | |
9080 | /* Debug info. */ | |
9081 | ||
9082 | ||
9083 | /* Dump an @interface declaration of the supplied class CHAIN to the | |
9084 | supplied file FP. Used to implement the -gen-decls option (which | |
9085 | prints out an @interface declaration of all classes compiled in | |
9086 | this run); potentially useful for debugging the compiler too. */ | |
9087 | void | |
9088 | dump_interface (FILE *fp, tree chain) | |
9089 | { | |
9090 | /* FIXME: A heap overflow here whenever a method (or ivar) | |
9091 | declaration is so long that it doesn't fit in the buffer. The | |
9092 | code and all the related functions should be rewritten to avoid | |
9093 | using fixed size buffers. */ | |
9094 | const char *my_name = IDENTIFIER_POINTER (CLASS_NAME (chain)); | |
9095 | tree ivar_decls = CLASS_RAW_IVARS (chain); | |
9096 | tree nst_methods = CLASS_NST_METHODS (chain); | |
9097 | tree cls_methods = CLASS_CLS_METHODS (chain); | |
9098 | ||
9099 | fprintf (fp, "\n@interface %s", my_name); | |
9100 | ||
9101 | /* CLASS_SUPER_NAME is used to store the superclass name for | |
9102 | classes, and the category name for categories. */ | |
9103 | if (CLASS_SUPER_NAME (chain)) | |
6408ef33 | 9104 | { |
d764a8e6 | 9105 | const char *name = IDENTIFIER_POINTER (CLASS_SUPER_NAME (chain)); |
38b9c8c3 | 9106 | |
d764a8e6 | 9107 | switch (TREE_CODE (chain)) |
38b9c8c3 | 9108 | { |
d764a8e6 IS |
9109 | case CATEGORY_IMPLEMENTATION_TYPE: |
9110 | case CATEGORY_INTERFACE_TYPE: | |
9111 | fprintf (fp, " (%s)\n", name); | |
9112 | break; | |
9113 | default: | |
9114 | fprintf (fp, " : %s\n", name); | |
9115 | break; | |
38b9c8c3 | 9116 | } |
d764a8e6 IS |
9117 | } |
9118 | else | |
9119 | fprintf (fp, "\n"); | |
9120 | ||
9121 | /* FIXME - the following doesn't seem to work at the moment. */ | |
9122 | if (ivar_decls) | |
9123 | { | |
9124 | fprintf (fp, "{\n"); | |
9125 | do | |
d4e72c58 | 9126 | { |
d764a8e6 IS |
9127 | fprintf (fp, "\t%s;\n", gen_declaration (ivar_decls)); |
9128 | ivar_decls = TREE_CHAIN (ivar_decls); | |
d4e72c58 | 9129 | } |
d764a8e6 IS |
9130 | while (ivar_decls); |
9131 | fprintf (fp, "}\n"); | |
6408ef33 ZL |
9132 | } |
9133 | ||
d764a8e6 | 9134 | while (nst_methods) |
ec3e9f82 | 9135 | { |
d764a8e6 IS |
9136 | fprintf (fp, "- %s;\n", gen_method_decl (nst_methods)); |
9137 | nst_methods = TREE_CHAIN (nst_methods); | |
ec3e9f82 | 9138 | } |
6c65299b | 9139 | |
d764a8e6 | 9140 | while (cls_methods) |
e31c7eec | 9141 | { |
d764a8e6 IS |
9142 | fprintf (fp, "+ %s;\n", gen_method_decl (cls_methods)); |
9143 | cls_methods = TREE_CHAIN (cls_methods); | |
e31c7eec TW |
9144 | } |
9145 | ||
d764a8e6 IS |
9146 | fprintf (fp, "@end\n"); |
9147 | } | |
e31c7eec | 9148 | |
d764a8e6 IS |
9149 | #if 0 |
9150 | /* Produce the pretty printing for an Objective-C method. This is | |
9151 | currently unused, but could be handy while reorganizing the pretty | |
9152 | printing to be more robust. */ | |
9153 | static const char * | |
9154 | objc_pretty_print_method (bool is_class_method, | |
9155 | const char *class_name, | |
9156 | const char *category_name, | |
9157 | const char *selector) | |
9158 | { | |
9159 | if (category_name) | |
9160 | { | |
944fb799 | 9161 | char *result = XNEWVEC (char, strlen (class_name) + strlen (category_name) |
d764a8e6 | 9162 | + strlen (selector) + 7); |
6c65299b | 9163 | |
d764a8e6 IS |
9164 | if (is_class_method) |
9165 | sprintf (result, "+[%s(%s) %s]", class_name, category_name, selector); | |
9166 | else | |
9167 | sprintf (result, "-[%s(%s) %s]", class_name, category_name, selector); | |
6c65299b | 9168 | |
d764a8e6 IS |
9169 | return result; |
9170 | } | |
9171 | else | |
9172 | { | |
9173 | char *result = XNEWVEC (char, strlen (class_name) | |
9174 | + strlen (selector) + 5); | |
6c65299b | 9175 | |
d764a8e6 IS |
9176 | if (is_class_method) |
9177 | sprintf (result, "+[%s %s]", class_name, selector); | |
9178 | else | |
9179 | sprintf (result, "-[%s %s]", class_name, selector); | |
6c65299b | 9180 | |
944fb799 | 9181 | return result; |
d764a8e6 IS |
9182 | } |
9183 | } | |
9184 | #endif | |
6c65299b | 9185 | |
d764a8e6 IS |
9186 | /* Demangle function for Objective-C. Attempt to demangle the |
9187 | function name associated with a method (eg, going from | |
9188 | "_i_NSObject__class" to "-[NSObject class]"); usually for the | |
9189 | purpose of pretty printing or error messages. Return the demangled | |
9190 | name, or NULL if the string is not an Objective-C mangled method | |
9191 | name. | |
9192 | ||
9193 | Because of how the mangling is done, any method that has a '_' in | |
9194 | its original name is at risk of being demangled incorrectly. In | |
9195 | some cases there are multiple valid ways to demangle a method name | |
9196 | and there is no way we can decide. | |
9197 | ||
9198 | TODO: objc_demangle() can't always get it right; the right way to | |
9199 | get this correct for all method names would be to store the | |
9200 | Objective-C method name somewhere in the function decl. Then, | |
9201 | there is no demangling to do; we'd just pull the method name out of | |
9202 | the decl. As an additional bonus, when printing error messages we | |
9203 | could check for such a method name, and if we find it, we know the | |
9204 | function is actually an Objective-C method and we could print error | |
9205 | messages saying "In method '+[NSObject class]" instead of "In | |
9206 | function '+[NSObject class]" as we do now. */ | |
9207 | static const char * | |
9208 | objc_demangle (const char *mangled) | |
9209 | { | |
9210 | char *demangled, *cp; | |
9211 | ||
9212 | /* First of all, if the name is too short it can't be an Objective-C | |
9213 | mangled method name. */ | |
9214 | if (mangled[0] == '\0' || mangled[1] == '\0' || mangled[2] == '\0') | |
9215 | return NULL; | |
9216 | ||
9217 | /* If the name looks like an already demangled one, return it | |
9218 | unchanged. This should only happen on Darwin, where method names | |
9219 | are mangled differently into a pretty-print form (such as | |
9220 | '+[NSObject class]', see darwin.h). In that case, demangling is | |
9221 | a no-op, but we need to return the demangled name if it was an | |
9222 | ObjC one, and return NULL if not. We should be safe as no C/C++ | |
9223 | function can start with "-[" or "+[". */ | |
9224 | if ((mangled[0] == '-' || mangled[0] == '+') | |
9225 | && (mangled[1] == '[')) | |
9226 | return mangled; | |
9227 | ||
9228 | if (mangled[0] == '_' && | |
9229 | (mangled[1] == 'i' || mangled[1] == 'c') && | |
9230 | mangled[2] == '_') | |
9231 | { | |
9232 | cp = demangled = XNEWVEC (char, strlen(mangled) + 2); | |
9233 | if (mangled[1] == 'i') | |
9234 | *cp++ = '-'; /* for instance method */ | |
9235 | else | |
9236 | *cp++ = '+'; /* for class method */ | |
9237 | *cp++ = '['; /* opening left brace */ | |
9238 | strcpy(cp, mangled+3); /* tack on the rest of the mangled name */ | |
9239 | while (*cp && *cp == '_') | |
9240 | cp++; /* skip any initial underbars in class name */ | |
9241 | cp = strchr(cp, '_'); /* find first non-initial underbar */ | |
9242 | if (cp == NULL) | |
50ea5861 | 9243 | { |
d764a8e6 IS |
9244 | free(demangled); /* not mangled name */ |
9245 | return NULL; | |
50ea5861 | 9246 | } |
d764a8e6 | 9247 | if (cp[1] == '_') /* easy case: no category name */ |
143dc646 | 9248 | { |
d764a8e6 IS |
9249 | *cp++ = ' '; /* replace two '_' with one ' ' */ |
9250 | strcpy(cp, mangled + (cp - demangled) + 2); | |
143dc646 | 9251 | } |
6c65299b | 9252 | else |
d4e72c58 | 9253 | { |
d764a8e6 IS |
9254 | *cp++ = '('; /* less easy case: category name */ |
9255 | cp = strchr(cp, '_'); | |
9256 | if (cp == 0) | |
d4e72c58 | 9257 | { |
d764a8e6 IS |
9258 | free(demangled); /* not mangled name */ |
9259 | return NULL; | |
d4e72c58 | 9260 | } |
d764a8e6 IS |
9261 | *cp++ = ')'; |
9262 | *cp++ = ' '; /* overwriting 1st char of method name... */ | |
9263 | strcpy(cp, mangled + (cp - demangled)); /* get it back */ | |
d4e72c58 | 9264 | } |
d764a8e6 IS |
9265 | /* Now we have the method name. We need to generally replace |
9266 | '_' with ':' but trying to preserve '_' if it could only have | |
9267 | been in the mangled string because it was already in the | |
9268 | original name. In cases where it's ambiguous, we assume that | |
9269 | any '_' originated from a ':'. */ | |
51900510 | 9270 | |
d764a8e6 IS |
9271 | /* Initial '_'s in method name can't have been generating by |
9272 | converting ':'s. Skip them. */ | |
9273 | while (*cp && *cp == '_') | |
9274 | cp++; | |
d4e72c58 | 9275 | |
d764a8e6 IS |
9276 | /* If the method name does not end with '_', then it has no |
9277 | arguments and there was no replacement of ':'s with '_'s | |
9278 | during mangling. Check for that case, and skip any | |
9279 | replacement if so. This at least guarantees that methods | |
9280 | with no arguments are always demangled correctly (unless the | |
9281 | original name ends with '_'). */ | |
9282 | if (*(mangled + strlen (mangled) - 1) != '_') | |
9283 | { | |
9284 | /* Skip to the end. */ | |
9285 | for (; *cp; cp++) | |
9286 | ; | |
9287 | } | |
9288 | else | |
9289 | { | |
9290 | /* Replace remaining '_' with ':'. This may get it wrong if | |
9291 | there were '_'s in the original name. In most cases it | |
9292 | is impossible to disambiguate. */ | |
9293 | for (; *cp; cp++) | |
9294 | if (*cp == '_') | |
944fb799 | 9295 | *cp = ':'; |
d764a8e6 IS |
9296 | } |
9297 | *cp++ = ']'; /* closing right brace */ | |
9298 | *cp++ = 0; /* string terminator */ | |
9299 | return demangled; | |
9300 | } | |
9301 | else | |
9302 | return NULL; /* not an objc mangled name */ | |
9303 | } | |
ec3e9f82 | 9304 | |
d764a8e6 IS |
9305 | /* Try to pretty-print a decl. If the 'decl' is an Objective-C |
9306 | specific decl, return the printable name for it. If not, return | |
9307 | NULL. */ | |
9308 | const char * | |
9309 | objc_maybe_printable_name (tree decl, int v ATTRIBUTE_UNUSED) | |
9310 | { | |
9311 | switch (TREE_CODE (decl)) | |
9312 | { | |
9313 | case FUNCTION_DECL: | |
9314 | return objc_demangle (IDENTIFIER_POINTER (DECL_NAME (decl))); | |
50ea5861 | 9315 | break; |
6c65299b | 9316 | |
d764a8e6 IS |
9317 | /* The following happens when we are printing a deprecation |
9318 | warning for a method. The warn_deprecation() will end up | |
9319 | trying to print the decl for INSTANCE_METHOD_DECL or | |
9320 | CLASS_METHOD_DECL. It would be nice to be able to print | |
9321 | "-[NSObject autorelease] is deprecated", but to do that, we'd | |
9322 | need to store the class and method name in the method decl, | |
9323 | which we currently don't do. For now, just return the name | |
9324 | of the method. We don't return NULL, because that may | |
9325 | trigger further attempts to pretty-print the decl in C/C++, | |
9326 | but they wouldn't know how to pretty-print it. */ | |
9327 | case INSTANCE_METHOD_DECL: | |
9328 | case CLASS_METHOD_DECL: | |
9329 | return IDENTIFIER_POINTER (DECL_NAME (decl)); | |
9330 | break; | |
9331 | /* This happens when printing a deprecation warning for a | |
9332 | property. We may want to consider some sort of pretty | |
9333 | printing (eg, include the class name where it was declared | |
9334 | ?). */ | |
9335 | case PROPERTY_DECL: | |
9336 | return IDENTIFIER_POINTER (PROPERTY_NAME (decl)); | |
50ea5861 NP |
9337 | break; |
9338 | default: | |
d764a8e6 IS |
9339 | return NULL; |
9340 | break; | |
6c65299b | 9341 | } |
6c65299b RS |
9342 | } |
9343 | ||
d764a8e6 IS |
9344 | /* Return a printable name for 'decl'. This first tries |
9345 | objc_maybe_printable_name(), and if that fails, it returns the name | |
9346 | in the decl. This is used as LANG_HOOKS_DECL_PRINTABLE_NAME for | |
9347 | Objective-C; in Objective-C++, setting the hook is not enough | |
9348 | because lots of C++ Front-End code calls cxx_printable_name, | |
9349 | dump_decl and other C++ functions directly. So instead we have | |
9350 | modified dump_decl to call objc_maybe_printable_name directly. */ | |
9351 | const char * | |
9352 | objc_printable_name (tree decl, int v) | |
9353 | { | |
9354 | const char *demangled_name = objc_maybe_printable_name (decl, v); | |
6c65299b | 9355 | |
d764a8e6 IS |
9356 | if (demangled_name != NULL) |
9357 | return demangled_name; | |
9358 | else | |
9359 | return IDENTIFIER_POINTER (DECL_NAME (decl)); | |
9360 | } | |
6c65299b | 9361 | |
944fb799 MS |
9362 | /* Routine is called to issue diagnostic when reference to a private |
9363 | ivar is made and no other variable with same name is found in | |
d764a8e6 IS |
9364 | current scope. */ |
9365 | bool | |
9366 | objc_diagnose_private_ivar (tree id) | |
9367 | { | |
9368 | tree ivar; | |
9369 | if (!objc_method_context) | |
9370 | return false; | |
9371 | ivar = is_ivar (objc_ivar_chain, id); | |
9372 | if (ivar && is_private (ivar)) | |
9373 | { | |
944fb799 | 9374 | error ("instance variable %qs is declared private", |
d764a8e6 IS |
9375 | IDENTIFIER_POINTER (id)); |
9376 | return true; | |
9377 | } | |
9378 | return false; | |
9379 | } | |
6c65299b | 9380 | |
d764a8e6 IS |
9381 | /* Look up ID as an instance variable. OTHER contains the result of |
9382 | the C or C++ lookup, which we may want to use instead. */ | |
9383 | /* To use properties inside an instance method, use self.property. */ | |
9384 | tree | |
9385 | objc_lookup_ivar (tree other, tree id) | |
9386 | { | |
9387 | tree ivar; | |
6c65299b | 9388 | |
d764a8e6 IS |
9389 | /* If we are not inside of an ObjC method, ivar lookup makes no sense. */ |
9390 | if (!objc_method_context) | |
9391 | return other; | |
6c65299b | 9392 | |
d764a8e6 IS |
9393 | if (!strcmp (IDENTIFIER_POINTER (id), "super")) |
9394 | /* We have a message to super. */ | |
9395 | return get_super_receiver (); | |
6c65299b | 9396 | |
d764a8e6 IS |
9397 | /* In a class method, look up an instance variable only as a last |
9398 | resort. */ | |
9399 | if (TREE_CODE (objc_method_context) == CLASS_METHOD_DECL | |
9400 | && other && other != error_mark_node) | |
9401 | return other; | |
9402 | ||
9403 | /* Look up the ivar, but do not use it if it is not accessible. */ | |
9404 | ivar = is_ivar (objc_ivar_chain, id); | |
944fb799 | 9405 | |
d764a8e6 IS |
9406 | if (!ivar || is_private (ivar)) |
9407 | return other; | |
9408 | ||
9409 | /* In an instance method, a local variable (or parameter) may hide the | |
9410 | instance variable. */ | |
9411 | if (TREE_CODE (objc_method_context) == INSTANCE_METHOD_DECL | |
9412 | && other && other != error_mark_node | |
6408ef33 | 9413 | #ifdef OBJCPLUS |
d764a8e6 IS |
9414 | && CP_DECL_CONTEXT (other) != global_namespace) |
9415 | #else | |
9416 | && !DECL_FILE_SCOPE_P (other)) | |
9417 | #endif | |
9418 | { | |
9419 | warning (0, "local declaration of %qE hides instance variable", id); | |
9420 | ||
9421 | return other; | |
6c65299b | 9422 | } |
6c65299b | 9423 | |
d764a8e6 IS |
9424 | /* At this point, we are either in an instance method with no obscuring |
9425 | local definitions, or in a class method with no alternate definitions | |
9426 | at all. */ | |
9427 | return build_ivar_reference (id); | |
668ea4b1 IS |
9428 | } |
9429 | ||
d764a8e6 IS |
9430 | /* Possibly rewrite a function CALL into an OBJ_TYPE_REF expression. This |
9431 | needs to be done if we are calling a function through a cast. */ | |
9432 | ||
9433 | tree | |
9434 | objc_rewrite_function_call (tree function, tree first_param) | |
8f07a2aa | 9435 | { |
d764a8e6 IS |
9436 | if (TREE_CODE (function) == NOP_EXPR |
9437 | && TREE_CODE (TREE_OPERAND (function, 0)) == ADDR_EXPR | |
9438 | && TREE_CODE (TREE_OPERAND (TREE_OPERAND (function, 0), 0)) | |
9439 | == FUNCTION_DECL) | |
9440 | { | |
9441 | function = build3 (OBJ_TYPE_REF, TREE_TYPE (function), | |
9442 | TREE_OPERAND (function, 0), | |
9443 | first_param, size_zero_node); | |
9444 | } | |
8f07a2aa | 9445 | |
d764a8e6 IS |
9446 | return function; |
9447 | } | |
8f07a2aa | 9448 | |
d764a8e6 IS |
9449 | /* This is called to "gimplify" a PROPERTY_REF node. It builds the |
9450 | corresponding 'getter' function call. Note that we assume the | |
9451 | PROPERTY_REF to be valid since we generated it while parsing. */ | |
9452 | static void | |
9453 | objc_gimplify_property_ref (tree *expr_p) | |
9454 | { | |
9455 | tree getter = PROPERTY_REF_GETTER_CALL (*expr_p); | |
9456 | tree call_exp; | |
8f07a2aa | 9457 | |
d764a8e6 | 9458 | if (getter == NULL_TREE) |
8f07a2aa | 9459 | { |
d764a8e6 IS |
9460 | tree property_decl = PROPERTY_REF_PROPERTY_DECL (*expr_p); |
9461 | /* This can happen if DECL_ARTIFICIAL (*expr_p), but | |
9462 | should be impossible for real properties, which always | |
9463 | have a getter. */ | |
9464 | error_at (EXPR_LOCATION (*expr_p), "no %qs getter found", | |
9465 | IDENTIFIER_POINTER (PROPERTY_NAME (property_decl))); | |
9466 | /* Try to recover from the error to prevent an ICE. We take | |
9467 | zero and cast it to the type of the property. */ | |
9468 | *expr_p = convert (TREE_TYPE (property_decl), | |
9469 | integer_zero_node); | |
9470 | return; | |
8f07a2aa | 9471 | } |
8f07a2aa | 9472 | |
d764a8e6 IS |
9473 | if (PROPERTY_REF_DEPRECATED_GETTER (*expr_p)) |
9474 | { | |
9475 | /* PROPERTY_REF_DEPRECATED_GETTER contains the method prototype | |
9476 | that is deprecated. */ | |
9477 | warn_deprecated_use (PROPERTY_REF_DEPRECATED_GETTER (*expr_p), | |
9478 | NULL_TREE); | |
8f07a2aa | 9479 | } |
8f07a2aa | 9480 | |
d764a8e6 IS |
9481 | call_exp = getter; |
9482 | #ifdef OBJCPLUS | |
9483 | /* In C++, a getter which returns an aggregate value results in a | |
9484 | target_expr which initializes a temporary to the call | |
9485 | expression. */ | |
9486 | if (TREE_CODE (getter) == TARGET_EXPR) | |
8f07a2aa | 9487 | { |
d764a8e6 IS |
9488 | gcc_assert (MAYBE_CLASS_TYPE_P (TREE_TYPE (getter))); |
9489 | gcc_assert (TREE_CODE (TREE_OPERAND (getter, 0)) == VAR_DECL); | |
9490 | call_exp = TREE_OPERAND (getter, 1); | |
8f07a2aa | 9491 | } |
d764a8e6 IS |
9492 | #endif |
9493 | gcc_assert (TREE_CODE (call_exp) == CALL_EXPR); | |
944fb799 | 9494 | |
d764a8e6 | 9495 | *expr_p = call_exp; |
8f07a2aa NP |
9496 | } |
9497 | ||
d764a8e6 IS |
9498 | /* This is called when "gimplifying" the trees. We need to gimplify |
9499 | the Objective-C/Objective-C++ specific trees, then hand over the | |
9500 | process to C/C++. */ | |
9501 | int | |
9502 | objc_gimplify_expr (tree *expr_p, gimple_seq *pre_p, gimple_seq *post_p) | |
668ea4b1 | 9503 | { |
d764a8e6 IS |
9504 | enum tree_code code = TREE_CODE (*expr_p); |
9505 | switch (code) | |
8f07a2aa | 9506 | { |
d764a8e6 IS |
9507 | /* Look for the special case of OBJC_TYPE_REF with the address |
9508 | of a function in OBJ_TYPE_REF_EXPR (presumably objc_msgSend | |
9509 | or one of its cousins). */ | |
9510 | case OBJ_TYPE_REF: | |
9511 | if (TREE_CODE (OBJ_TYPE_REF_EXPR (*expr_p)) == ADDR_EXPR | |
9512 | && TREE_CODE (TREE_OPERAND (OBJ_TYPE_REF_EXPR (*expr_p), 0)) | |
9513 | == FUNCTION_DECL) | |
8f07a2aa | 9514 | { |
d764a8e6 | 9515 | enum gimplify_status r0, r1; |
8f07a2aa | 9516 | |
d764a8e6 IS |
9517 | /* Postincrements in OBJ_TYPE_REF_OBJECT don't affect the |
9518 | value of the OBJ_TYPE_REF, so force them to be emitted | |
9519 | during subexpression evaluation rather than after the | |
9520 | OBJ_TYPE_REF. This permits objc_msgSend calls in | |
9521 | Objective C to use direct rather than indirect calls when | |
9522 | the object expression has a postincrement. */ | |
9523 | r0 = gimplify_expr (&OBJ_TYPE_REF_OBJECT (*expr_p), pre_p, NULL, | |
9524 | is_gimple_val, fb_rvalue); | |
9525 | r1 = gimplify_expr (&OBJ_TYPE_REF_EXPR (*expr_p), pre_p, post_p, | |
9526 | is_gimple_val, fb_rvalue); | |
944fb799 | 9527 | |
d764a8e6 | 9528 | return MIN (r0, r1); |
8f07a2aa NP |
9529 | } |
9530 | break; | |
d764a8e6 IS |
9531 | case PROPERTY_REF: |
9532 | objc_gimplify_property_ref (expr_p); | |
9533 | /* Do not return yet; let C/C++ gimplify the resulting expression. */ | |
9534 | break; | |
8f07a2aa | 9535 | default: |
d764a8e6 | 9536 | break; |
8f07a2aa | 9537 | } |
46a88c12 | 9538 | |
668ea4b1 | 9539 | #ifdef OBJCPLUS |
d764a8e6 | 9540 | return (enum gimplify_status) cp_gimplify_expr (expr_p, pre_p, post_p); |
668ea4b1 | 9541 | #else |
d764a8e6 | 9542 | return (enum gimplify_status) c_gimplify_expr (expr_p, pre_p, post_p); |
668ea4b1 | 9543 | #endif |
668ea4b1 IS |
9544 | } |
9545 | ||
d764a8e6 IS |
9546 | /* --- FAST ENUMERATION --- */ |
9547 | /* Begin code generation for fast enumeration (foreach) ... */ | |
668ea4b1 | 9548 | |
d764a8e6 | 9549 | /* Defines |
668ea4b1 | 9550 | |
d764a8e6 IS |
9551 | struct __objcFastEnumerationState |
9552 | { | |
9553 | unsigned long state; | |
9554 | id *itemsPtr; | |
9555 | unsigned long *mutationsPtr; | |
9556 | unsigned long extra[5]; | |
9557 | }; | |
668ea4b1 | 9558 | |
d764a8e6 | 9559 | Confusingly enough, NSFastEnumeration is then defined by libraries |
944fb799 | 9560 | to be the same structure. |
d764a8e6 | 9561 | */ |
668ea4b1 | 9562 | |
d764a8e6 IS |
9563 | static void |
9564 | build_fast_enumeration_state_template (void) | |
9565 | { | |
9566 | tree decls, *chain = NULL; | |
46a88c12 | 9567 | |
d764a8e6 | 9568 | /* { */ |
944fb799 | 9569 | objc_fast_enumeration_state_template = objc_start_struct (get_identifier |
d764a8e6 | 9570 | (TAG_FAST_ENUMERATION_STATE)); |
668ea4b1 | 9571 | |
d764a8e6 IS |
9572 | /* unsigned long state; */ |
9573 | decls = add_field_decl (long_unsigned_type_node, "state", &chain); | |
46a88c12 | 9574 | |
d764a8e6 | 9575 | /* id *itemsPtr; */ |
944fb799 | 9576 | add_field_decl (build_pointer_type (objc_object_type), |
d764a8e6 | 9577 | "itemsPtr", &chain); |
46a88c12 | 9578 | |
d764a8e6 | 9579 | /* unsigned long *mutationsPtr; */ |
944fb799 | 9580 | add_field_decl (build_pointer_type (long_unsigned_type_node), |
d764a8e6 | 9581 | "mutationsPtr", &chain); |
8f07a2aa | 9582 | |
d764a8e6 | 9583 | /* unsigned long extra[5]; */ |
944fb799 | 9584 | add_field_decl (build_sized_array_type (long_unsigned_type_node, 5), |
d764a8e6 | 9585 | "extra", &chain); |
8f07a2aa | 9586 | |
d764a8e6 IS |
9587 | /* } */ |
9588 | objc_finish_struct (objc_fast_enumeration_state_template, decls); | |
9589 | } | |
8f07a2aa | 9590 | |
d764a8e6 IS |
9591 | /* |
9592 | 'objc_finish_foreach_loop()' generates the code for an Objective-C | |
9593 | foreach loop. The 'location' argument is the location of the 'for' | |
9594 | that starts the loop. The 'object_expression' is the expression of | |
9595 | the 'object' that iterates; the 'collection_expression' is the | |
9596 | expression of the collection that we iterate over (we need to make | |
9597 | sure we evaluate this only once); the 'for_body' is the set of | |
9598 | statements to be executed in each iteration; 'break_label' and | |
9599 | 'continue_label' are the break and continue labels which we need to | |
9600 | emit since the <statements> may be jumping to 'break_label' (if they | |
9601 | contain 'break') or to 'continue_label' (if they contain | |
9602 | 'continue'). | |
8f07a2aa | 9603 | |
d764a8e6 | 9604 | The syntax is |
944fb799 | 9605 | |
d764a8e6 IS |
9606 | for (<object expression> in <collection expression>) |
9607 | <statements> | |
8f07a2aa | 9608 | |
d764a8e6 IS |
9609 | which is compiled into the following blurb: |
9610 | ||
9611 | { | |
9612 | id __objc_foreach_collection; | |
9613 | __objc_fast_enumeration_state __objc_foreach_enum_state; | |
9614 | unsigned long __objc_foreach_batchsize; | |
9615 | id __objc_foreach_items[16]; | |
9616 | __objc_foreach_collection = <collection expression>; | |
9617 | __objc_foreach_enum_state = { 0 }; | |
9618 | __objc_foreach_batchsize = [__objc_foreach_collection countByEnumeratingWithState: &__objc_foreach_enum_state objects: __objc_foreach_items count: 16]; | |
944fb799 | 9619 | |
d764a8e6 IS |
9620 | if (__objc_foreach_batchsize == 0) |
9621 | <object expression> = nil; | |
9622 | else | |
9623 | { | |
9624 | unsigned long __objc_foreach_mutations_pointer = *__objc_foreach_enum_state.mutationsPtr; | |
9625 | next_batch: | |
8f07a2aa | 9626 | { |
d764a8e6 IS |
9627 | unsigned long __objc_foreach_index; |
9628 | __objc_foreach_index = 0; | |
8f07a2aa | 9629 | |
d764a8e6 IS |
9630 | next_object: |
9631 | if (__objc_foreach_mutation_pointer != *__objc_foreach_enum_state.mutationsPtr) objc_enumeration_mutation (<collection expression>); | |
9632 | <object expression> = enumState.itemsPtr[__objc_foreach_index]; | |
9633 | <statements> [PS: inside <statments>, 'break' jumps to break_label and 'continue' jumps to continue_label] | |
8f07a2aa | 9634 | |
d764a8e6 IS |
9635 | continue_label: |
9636 | __objc_foreach_index++; | |
9637 | if (__objc_foreach_index < __objc_foreach_batchsize) goto next_object; | |
9638 | __objc_foreach_batchsize = [__objc_foreach_collection countByEnumeratingWithState: &__objc_foreach_enum_state objects: __objc_foreach_items count: 16]; | |
9639 | } | |
9640 | if (__objc_foreach_batchsize != 0) goto next_batch; | |
9641 | <object expression> = nil; | |
9642 | break_label: | |
8f07a2aa | 9643 | } |
d764a8e6 | 9644 | } |
8f07a2aa | 9645 | |
d764a8e6 IS |
9646 | 'statements' may contain a 'continue' or 'break' instruction, which |
9647 | the user expects to 'continue' or 'break' the entire foreach loop. | |
9648 | We are provided the labels that 'break' and 'continue' jump to, so | |
9649 | we place them where we want them to jump to when they pick them. | |
944fb799 | 9650 | |
d764a8e6 IS |
9651 | Optimization TODO: we could cache the IMP of |
9652 | countByEnumeratingWithState:objects:count:. | |
9653 | */ | |
8f07a2aa | 9654 | |
d764a8e6 IS |
9655 | /* If you need to debug objc_finish_foreach_loop(), uncomment the following line. */ |
9656 | /* #define DEBUG_OBJC_FINISH_FOREACH_LOOP 1 */ | |
8f07a2aa | 9657 | |
d764a8e6 IS |
9658 | #ifdef DEBUG_OBJC_FINISH_FOREACH_LOOP |
9659 | #include "tree-pretty-print.h" | |
668ea4b1 | 9660 | #endif |
668ea4b1 | 9661 | |
d764a8e6 | 9662 | void |
944fb799 | 9663 | objc_finish_foreach_loop (location_t location, tree object_expression, tree collection_expression, tree for_body, |
d764a8e6 | 9664 | tree break_label, tree continue_label) |
46a88c12 | 9665 | { |
d764a8e6 IS |
9666 | /* A tree representing the __objcFastEnumerationState struct type, |
9667 | or NSFastEnumerationState struct, whatever we are using. */ | |
9668 | tree objc_fast_enumeration_state_type; | |
46a88c12 | 9669 | |
d764a8e6 IS |
9670 | /* The trees representing the declarations of each of the local variables. */ |
9671 | tree objc_foreach_collection_decl; | |
9672 | tree objc_foreach_enum_state_decl; | |
9673 | tree objc_foreach_items_decl; | |
9674 | tree objc_foreach_batchsize_decl; | |
9675 | tree objc_foreach_mutations_pointer_decl; | |
9676 | tree objc_foreach_index_decl; | |
46a88c12 | 9677 | |
d764a8e6 IS |
9678 | /* A tree representing the selector countByEnumeratingWithState:objects:count:. */ |
9679 | tree selector_name; | |
46a88c12 | 9680 | |
d764a8e6 IS |
9681 | /* A tree representing the local bind. */ |
9682 | tree bind; | |
46a88c12 | 9683 | |
d764a8e6 IS |
9684 | /* A tree representing the external 'if (__objc_foreach_batchsize)' */ |
9685 | tree first_if; | |
46a88c12 | 9686 | |
d764a8e6 IS |
9687 | /* A tree representing the 'else' part of 'first_if' */ |
9688 | tree first_else; | |
46a88c12 | 9689 | |
d764a8e6 IS |
9690 | /* A tree representing the 'next_batch' label. */ |
9691 | tree next_batch_label_decl; | |
46a88c12 | 9692 | |
d764a8e6 IS |
9693 | /* A tree representing the binding after the 'next_batch' label. */ |
9694 | tree next_batch_bind; | |
46a88c12 | 9695 | |
d764a8e6 IS |
9696 | /* A tree representing the 'next_object' label. */ |
9697 | tree next_object_label_decl; | |
46a88c12 | 9698 | |
d764a8e6 IS |
9699 | /* Temporary variables. */ |
9700 | tree t; | |
9701 | int i; | |
46a88c12 | 9702 | |
22d8d616 | 9703 | if (flag_objc1_only) |
d764a8e6 | 9704 | error_at (location, "fast enumeration is not available in Objective-C 1.0"); |
22d8d616 | 9705 | |
d764a8e6 | 9706 | if (object_expression == error_mark_node) |
da57d1b9 NP |
9707 | return; |
9708 | ||
d764a8e6 IS |
9709 | if (collection_expression == error_mark_node) |
9710 | return; | |
46a88c12 | 9711 | |
d764a8e6 | 9712 | if (!objc_type_valid_for_messaging (TREE_TYPE (object_expression), true)) |
46a88c12 | 9713 | { |
d764a8e6 | 9714 | error_at (location, "iterating variable in fast enumeration is not an object"); |
46a88c12 NP |
9715 | return; |
9716 | } | |
9717 | ||
d764a8e6 | 9718 | if (!objc_type_valid_for_messaging (TREE_TYPE (collection_expression), true)) |
46a88c12 | 9719 | { |
d764a8e6 | 9720 | error_at (location, "collection in fast enumeration is not an object"); |
46a88c12 NP |
9721 | return; |
9722 | } | |
9723 | ||
d764a8e6 IS |
9724 | /* TODO: Check that object_expression is either a variable |
9725 | declaration, or an lvalue. */ | |
46a88c12 | 9726 | |
d764a8e6 IS |
9727 | /* This kludge is an idea from apple. We use the |
9728 | __objcFastEnumerationState struct implicitly defined by the | |
9729 | compiler, unless a NSFastEnumerationState struct has been defined | |
9730 | (by a Foundation library such as GNUstep Base) in which case, we | |
9731 | use that one. | |
9732 | */ | |
9733 | objc_fast_enumeration_state_type = objc_fast_enumeration_state_template; | |
9734 | { | |
9735 | tree objc_NSFastEnumeration_type = lookup_name (get_identifier ("NSFastEnumerationState")); | |
46a88c12 | 9736 | |
d764a8e6 | 9737 | if (objc_NSFastEnumeration_type) |
46a88c12 | 9738 | { |
d764a8e6 IS |
9739 | /* TODO: We really need to check that |
9740 | objc_NSFastEnumeration_type is the same as ours! */ | |
9741 | if (TREE_CODE (objc_NSFastEnumeration_type) == TYPE_DECL) | |
9742 | { | |
9743 | /* If it's a typedef, use the original type. */ | |
9744 | if (DECL_ORIGINAL_TYPE (objc_NSFastEnumeration_type)) | |
9745 | objc_fast_enumeration_state_type = DECL_ORIGINAL_TYPE (objc_NSFastEnumeration_type); | |
9746 | else | |
944fb799 | 9747 | objc_fast_enumeration_state_type = TREE_TYPE (objc_NSFastEnumeration_type); |
d764a8e6 | 9748 | } |
46a88c12 | 9749 | } |
d764a8e6 | 9750 | } |
46a88c12 | 9751 | |
d764a8e6 IS |
9752 | /* { */ |
9753 | /* Done by c-parser.c. */ | |
46a88c12 | 9754 | |
d764a8e6 IS |
9755 | /* type object; */ |
9756 | /* Done by c-parser.c. */ | |
da57d1b9 | 9757 | |
d764a8e6 | 9758 | /* Disable warnings that 'object' is unused. For example the code |
46a88c12 | 9759 | |
d764a8e6 IS |
9760 | for (id object in collection) |
9761 | i++; | |
da57d1b9 | 9762 | |
d764a8e6 IS |
9763 | which can be used to count how many objects there are in the |
9764 | collection is fine and should generate no warnings even if | |
9765 | 'object' is technically unused. */ | |
9766 | TREE_USED (object_expression) = 1; | |
9767 | if (DECL_P (object_expression)) | |
9768 | DECL_READ_P (object_expression) = 1; | |
46a88c12 | 9769 | |
d764a8e6 IS |
9770 | /* id __objc_foreach_collection */ |
9771 | objc_foreach_collection_decl = objc_create_temporary_var (objc_object_type, "__objc_foreach_collection"); | |
22d8d616 | 9772 | |
d764a8e6 IS |
9773 | /* __objcFastEnumerationState __objc_foreach_enum_state; */ |
9774 | objc_foreach_enum_state_decl = objc_create_temporary_var (objc_fast_enumeration_state_type, "__objc_foreach_enum_state"); | |
9775 | TREE_CHAIN (objc_foreach_enum_state_decl) = objc_foreach_collection_decl; | |
da57d1b9 | 9776 | |
d764a8e6 IS |
9777 | /* id __objc_foreach_items[16]; */ |
9778 | objc_foreach_items_decl = objc_create_temporary_var (build_sized_array_type (objc_object_type, 16), "__objc_foreach_items"); | |
9779 | TREE_CHAIN (objc_foreach_items_decl) = objc_foreach_enum_state_decl; | |
da57d1b9 | 9780 | |
d764a8e6 IS |
9781 | /* unsigned long __objc_foreach_batchsize; */ |
9782 | objc_foreach_batchsize_decl = objc_create_temporary_var (long_unsigned_type_node, "__objc_foreach_batchsize"); | |
9783 | TREE_CHAIN (objc_foreach_batchsize_decl) = objc_foreach_items_decl; | |
9a179d01 | 9784 | |
d764a8e6 IS |
9785 | /* Generate the local variable binding. */ |
9786 | bind = build3 (BIND_EXPR, void_type_node, objc_foreach_batchsize_decl, NULL, NULL); | |
9787 | SET_EXPR_LOCATION (bind, location); | |
9788 | TREE_SIDE_EFFECTS (bind) = 1; | |
944fb799 | 9789 | |
d764a8e6 IS |
9790 | /* __objc_foreach_collection = <collection expression>; */ |
9791 | t = build2 (MODIFY_EXPR, void_type_node, objc_foreach_collection_decl, collection_expression); | |
9792 | SET_EXPR_LOCATION (t, location); | |
9793 | append_to_statement_list (t, &BIND_EXPR_BODY (bind)); | |
9794 | /* We have used 'collection_expression'. */ | |
9795 | mark_exp_read (collection_expression); | |
46a88c12 | 9796 | |
d764a8e6 | 9797 | /* __objc_foreach_enum_state.state = 0; */ |
944fb799 | 9798 | t = build2 (MODIFY_EXPR, void_type_node, objc_build_component_ref (objc_foreach_enum_state_decl, |
d764a8e6 IS |
9799 | get_identifier ("state")), |
9800 | build_int_cst (long_unsigned_type_node, 0)); | |
9801 | SET_EXPR_LOCATION (t, location); | |
9802 | append_to_statement_list (t, &BIND_EXPR_BODY (bind)); | |
9803 | ||
9804 | /* __objc_foreach_enum_state.itemsPtr = NULL; */ | |
944fb799 | 9805 | t = build2 (MODIFY_EXPR, void_type_node, objc_build_component_ref (objc_foreach_enum_state_decl, |
d764a8e6 IS |
9806 | get_identifier ("itemsPtr")), |
9807 | null_pointer_node); | |
9808 | SET_EXPR_LOCATION (t, location); | |
9809 | append_to_statement_list (t, &BIND_EXPR_BODY (bind)); | |
9810 | ||
9811 | /* __objc_foreach_enum_state.mutationsPtr = NULL; */ | |
944fb799 | 9812 | t = build2 (MODIFY_EXPR, void_type_node, objc_build_component_ref (objc_foreach_enum_state_decl, |
d764a8e6 IS |
9813 | get_identifier ("mutationsPtr")), |
9814 | null_pointer_node); | |
9815 | SET_EXPR_LOCATION (t, location); | |
9816 | append_to_statement_list (t, &BIND_EXPR_BODY (bind)); | |
9817 | ||
9818 | /* __objc_foreach_enum_state.extra[0] = 0; */ | |
9819 | /* __objc_foreach_enum_state.extra[1] = 0; */ | |
9820 | /* __objc_foreach_enum_state.extra[2] = 0; */ | |
9821 | /* __objc_foreach_enum_state.extra[3] = 0; */ | |
9822 | /* __objc_foreach_enum_state.extra[4] = 0; */ | |
9823 | for (i = 0; i < 5 ; i++) | |
46a88c12 | 9824 | { |
d764a8e6 | 9825 | t = build2 (MODIFY_EXPR, void_type_node, |
944fb799 | 9826 | build_array_ref (location, objc_build_component_ref (objc_foreach_enum_state_decl, |
d764a8e6 IS |
9827 | get_identifier ("extra")), |
9828 | build_int_cst (NULL_TREE, i)), | |
9829 | build_int_cst (long_unsigned_type_node, 0)); | |
9830 | SET_EXPR_LOCATION (t, location); | |
9831 | append_to_statement_list (t, &BIND_EXPR_BODY (bind)); | |
46a88c12 | 9832 | } |
944fb799 | 9833 | |
d764a8e6 IS |
9834 | /* __objc_foreach_batchsize = [__objc_foreach_collection countByEnumeratingWithState: &__objc_foreach_enum_state objects: __objc_foreach_items count: 16]; */ |
9835 | selector_name = get_identifier ("countByEnumeratingWithState:objects:count:"); | |
9836 | #ifdef OBJCPLUS | |
9837 | t = objc_finish_message_expr (objc_foreach_collection_decl, selector_name, | |
9838 | /* Parameters. */ | |
9839 | tree_cons /* &__objc_foreach_enum_state */ | |
9840 | (NULL_TREE, build_fold_addr_expr_loc (location, objc_foreach_enum_state_decl), | |
9841 | tree_cons /* __objc_foreach_items */ | |
9842 | (NULL_TREE, objc_foreach_items_decl, | |
9843 | tree_cons /* 16 */ | |
9844 | (NULL_TREE, build_int_cst (NULL_TREE, 16), NULL_TREE))), NULL); | |
9845 | #else | |
9846 | /* In C, we need to decay the __objc_foreach_items array that we are passing. */ | |
9847 | { | |
9848 | struct c_expr array; | |
9849 | array.value = objc_foreach_items_decl; | |
9850 | t = objc_finish_message_expr (objc_foreach_collection_decl, selector_name, | |
9851 | /* Parameters. */ | |
9852 | tree_cons /* &__objc_foreach_enum_state */ | |
9853 | (NULL_TREE, build_fold_addr_expr_loc (location, objc_foreach_enum_state_decl), | |
9854 | tree_cons /* __objc_foreach_items */ | |
9855 | (NULL_TREE, default_function_array_conversion (location, array).value, | |
9856 | tree_cons /* 16 */ | |
9857 | (NULL_TREE, build_int_cst (NULL_TREE, 16), NULL_TREE))), NULL); | |
9858 | } | |
9859 | #endif | |
9860 | t = build2 (MODIFY_EXPR, void_type_node, objc_foreach_batchsize_decl, | |
9861 | convert (long_unsigned_type_node, t)); | |
9862 | SET_EXPR_LOCATION (t, location); | |
9863 | append_to_statement_list (t, &BIND_EXPR_BODY (bind)); | |
da57d1b9 | 9864 | |
d764a8e6 | 9865 | /* if (__objc_foreach_batchsize == 0) */ |
944fb799 | 9866 | first_if = build3 (COND_EXPR, void_type_node, |
d764a8e6 | 9867 | /* Condition. */ |
944fb799 MS |
9868 | c_fully_fold |
9869 | (c_common_truthvalue_conversion | |
9870 | (location, | |
d764a8e6 | 9871 | build_binary_op (location, |
944fb799 | 9872 | EQ_EXPR, |
d764a8e6 IS |
9873 | objc_foreach_batchsize_decl, |
9874 | build_int_cst (long_unsigned_type_node, 0), 1)), | |
9875 | false, NULL), | |
9876 | /* Then block (we fill it in later). */ | |
9877 | NULL_TREE, | |
9878 | /* Else block (we fill it in later). */ | |
9879 | NULL_TREE); | |
9880 | SET_EXPR_LOCATION (first_if, location); | |
9881 | append_to_statement_list (first_if, &BIND_EXPR_BODY (bind)); | |
668ea4b1 | 9882 | |
d764a8e6 IS |
9883 | /* then <object expression> = nil; */ |
9884 | t = build2 (MODIFY_EXPR, void_type_node, object_expression, convert (objc_object_type, null_pointer_node)); | |
9885 | SET_EXPR_LOCATION (t, location); | |
9886 | COND_EXPR_THEN (first_if) = t; | |
668ea4b1 | 9887 | |
d764a8e6 IS |
9888 | /* Now we build the 'else' part of the if; once we finish building |
9889 | it, we attach it to first_if as the 'else' part. */ | |
46a88c12 | 9890 | |
d764a8e6 IS |
9891 | /* else */ |
9892 | /* { */ | |
46a88c12 | 9893 | |
d764a8e6 IS |
9894 | /* unsigned long __objc_foreach_mutations_pointer; */ |
9895 | objc_foreach_mutations_pointer_decl = objc_create_temporary_var (long_unsigned_type_node, "__objc_foreach_mutations_pointer"); | |
668ea4b1 | 9896 | |
d764a8e6 IS |
9897 | /* Generate the local variable binding. */ |
9898 | first_else = build3 (BIND_EXPR, void_type_node, objc_foreach_mutations_pointer_decl, NULL, NULL); | |
9899 | SET_EXPR_LOCATION (first_else, location); | |
9900 | TREE_SIDE_EFFECTS (first_else) = 1; | |
e31c7eec | 9901 | |
d764a8e6 | 9902 | /* __objc_foreach_mutations_pointer = *__objc_foreach_enum_state.mutationsPtr; */ |
944fb799 MS |
9903 | t = build2 (MODIFY_EXPR, void_type_node, objc_foreach_mutations_pointer_decl, |
9904 | build_indirect_ref (location, objc_build_component_ref (objc_foreach_enum_state_decl, | |
d764a8e6 IS |
9905 | get_identifier ("mutationsPtr")), |
9906 | RO_UNARY_STAR)); | |
9907 | SET_EXPR_LOCATION (t, location); | |
9908 | append_to_statement_list (t, &BIND_EXPR_BODY (first_else)); | |
668ea4b1 | 9909 | |
d764a8e6 IS |
9910 | /* next_batch: */ |
9911 | next_batch_label_decl = create_artificial_label (location); | |
944fb799 | 9912 | t = build1 (LABEL_EXPR, void_type_node, next_batch_label_decl); |
d764a8e6 IS |
9913 | SET_EXPR_LOCATION (t, location); |
9914 | append_to_statement_list (t, &BIND_EXPR_BODY (first_else)); | |
944fb799 | 9915 | |
d764a8e6 | 9916 | /* { */ |
50ea5861 | 9917 | |
d764a8e6 IS |
9918 | /* unsigned long __objc_foreach_index; */ |
9919 | objc_foreach_index_decl = objc_create_temporary_var (long_unsigned_type_node, "__objc_foreach_index"); | |
4ca5d2a7 | 9920 | |
d764a8e6 IS |
9921 | /* Generate the local variable binding. */ |
9922 | next_batch_bind = build3 (BIND_EXPR, void_type_node, objc_foreach_index_decl, NULL, NULL); | |
9923 | SET_EXPR_LOCATION (next_batch_bind, location); | |
9924 | TREE_SIDE_EFFECTS (next_batch_bind) = 1; | |
9925 | append_to_statement_list (next_batch_bind, &BIND_EXPR_BODY (first_else)); | |
f05b9d93 | 9926 | |
d764a8e6 IS |
9927 | /* __objc_foreach_index = 0; */ |
9928 | t = build2 (MODIFY_EXPR, void_type_node, objc_foreach_index_decl, | |
9929 | build_int_cst (long_unsigned_type_node, 0)); | |
9930 | SET_EXPR_LOCATION (t, location); | |
9931 | append_to_statement_list (t, &BIND_EXPR_BODY (next_batch_bind)); | |
f05b9d93 | 9932 | |
d764a8e6 IS |
9933 | /* next_object: */ |
9934 | next_object_label_decl = create_artificial_label (location); | |
9935 | t = build1 (LABEL_EXPR, void_type_node, next_object_label_decl); | |
9936 | SET_EXPR_LOCATION (t, location); | |
9937 | append_to_statement_list (t, &BIND_EXPR_BODY (next_batch_bind)); | |
f05b9d93 | 9938 | |
d764a8e6 | 9939 | /* if (__objc_foreach_mutation_pointer != *__objc_foreach_enum_state.mutationsPtr) objc_enumeration_mutation (<collection expression>); */ |
944fb799 | 9940 | t = build3 (COND_EXPR, void_type_node, |
d764a8e6 | 9941 | /* Condition. */ |
944fb799 MS |
9942 | c_fully_fold |
9943 | (c_common_truthvalue_conversion | |
9944 | (location, | |
9945 | build_binary_op | |
d764a8e6 | 9946 | (location, |
944fb799 | 9947 | NE_EXPR, |
d764a8e6 | 9948 | objc_foreach_mutations_pointer_decl, |
944fb799 MS |
9949 | build_indirect_ref (location, |
9950 | objc_build_component_ref (objc_foreach_enum_state_decl, | |
d764a8e6 IS |
9951 | get_identifier ("mutationsPtr")), |
9952 | RO_UNARY_STAR), 1)), | |
9953 | false, NULL), | |
9954 | /* Then block. */ | |
9955 | build_function_call (input_location, | |
9956 | objc_enumeration_mutation_decl, | |
9957 | tree_cons (NULL, collection_expression, NULL)), | |
9958 | /* Else block. */ | |
9959 | NULL_TREE); | |
9960 | SET_EXPR_LOCATION (t, location); | |
9961 | append_to_statement_list (t, &BIND_EXPR_BODY (next_batch_bind)); | |
f05b9d93 | 9962 | |
d764a8e6 | 9963 | /* <object expression> = enumState.itemsPtr[__objc_foreach_index]; */ |
944fb799 MS |
9964 | t = build2 (MODIFY_EXPR, void_type_node, object_expression, |
9965 | build_array_ref (location, objc_build_component_ref (objc_foreach_enum_state_decl, | |
d764a8e6 IS |
9966 | get_identifier ("itemsPtr")), |
9967 | objc_foreach_index_decl)); | |
9968 | SET_EXPR_LOCATION (t, location); | |
9969 | append_to_statement_list (t, &BIND_EXPR_BODY (next_batch_bind)); | |
f05b9d93 | 9970 | |
d764a8e6 IS |
9971 | /* <statements> [PS: in <statments>, 'break' jumps to break_label and 'continue' jumps to continue_label] */ |
9972 | append_to_statement_list (for_body, &BIND_EXPR_BODY (next_batch_bind)); | |
f05b9d93 | 9973 | |
d764a8e6 IS |
9974 | /* continue_label: */ |
9975 | if (continue_label) | |
9976 | { | |
9977 | t = build1 (LABEL_EXPR, void_type_node, continue_label); | |
9978 | SET_EXPR_LOCATION (t, location); | |
9979 | append_to_statement_list (t, &BIND_EXPR_BODY (next_batch_bind)); | |
9980 | } | |
f05b9d93 | 9981 | |
d764a8e6 | 9982 | /* __objc_foreach_index++; */ |
944fb799 | 9983 | t = build2 (MODIFY_EXPR, void_type_node, objc_foreach_index_decl, |
d764a8e6 IS |
9984 | build_binary_op (location, |
9985 | PLUS_EXPR, | |
9986 | objc_foreach_index_decl, | |
9987 | build_int_cst (long_unsigned_type_node, 1), 1)); | |
9988 | SET_EXPR_LOCATION (t, location); | |
9989 | append_to_statement_list (t, &BIND_EXPR_BODY (next_batch_bind)); | |
f05b9d93 | 9990 | |
d764a8e6 | 9991 | /* if (__objc_foreach_index < __objc_foreach_batchsize) goto next_object; */ |
944fb799 | 9992 | t = build3 (COND_EXPR, void_type_node, |
d764a8e6 | 9993 | /* Condition. */ |
944fb799 MS |
9994 | c_fully_fold |
9995 | (c_common_truthvalue_conversion | |
9996 | (location, | |
d764a8e6 | 9997 | build_binary_op (location, |
944fb799 | 9998 | LT_EXPR, |
d764a8e6 IS |
9999 | objc_foreach_index_decl, |
10000 | objc_foreach_batchsize_decl, 1)), | |
10001 | false, NULL), | |
10002 | /* Then block. */ | |
10003 | build1 (GOTO_EXPR, void_type_node, next_object_label_decl), | |
10004 | /* Else block. */ | |
10005 | NULL_TREE); | |
10006 | SET_EXPR_LOCATION (t, location); | |
10007 | append_to_statement_list (t, &BIND_EXPR_BODY (next_batch_bind)); | |
944fb799 | 10008 | |
d764a8e6 IS |
10009 | /* __objc_foreach_batchsize = [__objc_foreach_collection countByEnumeratingWithState: &__objc_foreach_enum_state objects: __objc_foreach_items count: 16]; */ |
10010 | #ifdef OBJCPLUS | |
10011 | t = objc_finish_message_expr (objc_foreach_collection_decl, selector_name, | |
10012 | /* Parameters. */ | |
10013 | tree_cons /* &__objc_foreach_enum_state */ | |
10014 | (NULL_TREE, build_fold_addr_expr_loc (location, objc_foreach_enum_state_decl), | |
10015 | tree_cons /* __objc_foreach_items */ | |
10016 | (NULL_TREE, objc_foreach_items_decl, | |
10017 | tree_cons /* 16 */ | |
10018 | (NULL_TREE, build_int_cst (NULL_TREE, 16), NULL_TREE))), NULL); | |
10019 | #else | |
10020 | /* In C, we need to decay the __objc_foreach_items array that we are passing. */ | |
f05b9d93 | 10021 | { |
d764a8e6 IS |
10022 | struct c_expr array; |
10023 | array.value = objc_foreach_items_decl; | |
10024 | t = objc_finish_message_expr (objc_foreach_collection_decl, selector_name, | |
10025 | /* Parameters. */ | |
10026 | tree_cons /* &__objc_foreach_enum_state */ | |
10027 | (NULL_TREE, build_fold_addr_expr_loc (location, objc_foreach_enum_state_decl), | |
10028 | tree_cons /* __objc_foreach_items */ | |
10029 | (NULL_TREE, default_function_array_conversion (location, array).value, | |
10030 | tree_cons /* 16 */ | |
10031 | (NULL_TREE, build_int_cst (NULL_TREE, 16), NULL_TREE))), NULL); | |
10032 | } | |
10033 | #endif | |
944fb799 | 10034 | t = build2 (MODIFY_EXPR, void_type_node, objc_foreach_batchsize_decl, |
d764a8e6 IS |
10035 | convert (long_unsigned_type_node, t)); |
10036 | SET_EXPR_LOCATION (t, location); | |
10037 | append_to_statement_list (t, &BIND_EXPR_BODY (next_batch_bind)); | |
f05b9d93 | 10038 | |
d764a8e6 | 10039 | /* } */ |
f05b9d93 | 10040 | |
d764a8e6 | 10041 | /* if (__objc_foreach_batchsize != 0) goto next_batch; */ |
944fb799 | 10042 | t = build3 (COND_EXPR, void_type_node, |
d764a8e6 | 10043 | /* Condition. */ |
944fb799 MS |
10044 | c_fully_fold |
10045 | (c_common_truthvalue_conversion | |
10046 | (location, | |
d764a8e6 | 10047 | build_binary_op (location, |
944fb799 | 10048 | NE_EXPR, |
d764a8e6 IS |
10049 | objc_foreach_batchsize_decl, |
10050 | build_int_cst (long_unsigned_type_node, 0), 1)), | |
10051 | false, NULL), | |
10052 | /* Then block. */ | |
10053 | build1 (GOTO_EXPR, void_type_node, next_batch_label_decl), | |
10054 | /* Else block. */ | |
10055 | NULL_TREE); | |
10056 | SET_EXPR_LOCATION (t, location); | |
10057 | append_to_statement_list (t, &BIND_EXPR_BODY (first_else)); | |
f05b9d93 | 10058 | |
d764a8e6 IS |
10059 | /* <object expression> = nil; */ |
10060 | t = build2 (MODIFY_EXPR, void_type_node, object_expression, convert (objc_object_type, null_pointer_node)); | |
10061 | SET_EXPR_LOCATION (t, location); | |
10062 | append_to_statement_list (t, &BIND_EXPR_BODY (first_else)); | |
10063 | ||
10064 | /* break_label: */ | |
10065 | if (break_label) | |
10066 | { | |
10067 | t = build1 (LABEL_EXPR, void_type_node, break_label); | |
10068 | SET_EXPR_LOCATION (t, location); | |
10069 | append_to_statement_list (t, &BIND_EXPR_BODY (first_else)); | |
10070 | } | |
f05b9d93 | 10071 | |
d764a8e6 IS |
10072 | /* } */ |
10073 | COND_EXPR_ELSE (first_if) = first_else; | |
10074 | ||
10075 | /* Do the whole thing. */ | |
10076 | add_stmt (bind); | |
f05b9d93 NP |
10077 | |
10078 | #ifdef DEBUG_OBJC_FINISH_FOREACH_LOOP | |
d764a8e6 IS |
10079 | /* This will print to stderr the whole blurb generated by the |
10080 | compiler while compiling (assuming the compiler doesn't crash | |
10081 | before getting here). | |
10082 | */ | |
10083 | debug_generic_stmt (bind); | |
f05b9d93 NP |
10084 | #endif |
10085 | ||
d764a8e6 IS |
10086 | /* } */ |
10087 | /* Done by c-parser.c */ | |
10088 | } | |
10089 | ||
10090 | /* --- SUPPORT FOR FORMAT ARG CHECKING --- */ | |
10091 | /* Return true if we have an NxString object pointer. */ | |
10092 | ||
10093 | bool | |
10094 | objc_string_ref_type_p (tree strp) | |
10095 | { | |
10096 | tree tmv; | |
10097 | if (!strp || TREE_CODE (strp) != POINTER_TYPE) | |
10098 | return false; | |
10099 | ||
10100 | tmv = TYPE_MAIN_VARIANT (TREE_TYPE (strp)); | |
10101 | tmv = OBJC_TYPE_NAME (tmv); | |
10102 | return (tmv | |
944fb799 MS |
10103 | && TREE_CODE (tmv) == IDENTIFIER_NODE |
10104 | && IDENTIFIER_POINTER (tmv) | |
d764a8e6 IS |
10105 | && !strncmp (IDENTIFIER_POINTER (tmv), "NSString", 8)); |
10106 | } | |
10107 | ||
10108 | /* At present the behavior of this is undefined and it does nothing. */ | |
f05b9d93 | 10109 | void |
944fb799 | 10110 | objc_check_format_arg (tree ARG_UNUSED (format_arg), |
d764a8e6 | 10111 | tree ARG_UNUSED (args_list)) |
f05b9d93 | 10112 | { |
d764a8e6 | 10113 | } |
f05b9d93 | 10114 | |
d764a8e6 IS |
10115 | /* --- Encode --- */ |
10116 | /* "Encode" a data type into a string, which grows in util_obstack. | |
f05b9d93 | 10117 | |
d764a8e6 IS |
10118 | The format is described in gcc/doc/objc.texi, section 'Type |
10119 | encoding'. | |
f05b9d93 | 10120 | |
d764a8e6 IS |
10121 | Most of the encode_xxx functions have a 'type' argument, which is |
10122 | the type to encode, and an integer 'curtype' argument, which is the | |
10123 | index in the encoding string of the beginning of the encoding of | |
10124 | the current type, and allows you to find what characters have | |
10125 | already been written for the current type (they are the ones in the | |
10126 | current encoding string starting from 'curtype'). | |
f05b9d93 | 10127 | |
d764a8e6 IS |
10128 | For example, if we are encoding a method which returns 'int' and |
10129 | takes a 'char **' argument, then when we get to the point of | |
10130 | encoding the 'char **' argument, the encoded string already | |
10131 | contains 'i12@0:4' (assuming a pointer size of 4 bytes). So, | |
10132 | 'curtype' will be set to 7 when starting to encode 'char **'. | |
10133 | During the whole of the encoding of 'char **', 'curtype' will be | |
10134 | fixed at 7, so the routine encoding the second pointer can find out | |
10135 | that it's actually encoding a pointer to a pointer by looking | |
10136 | backwards at what has already been encoded for the current type, | |
10137 | and seeing there is a "^" (meaning a pointer) in there. | |
10138 | */ | |
f05b9d93 | 10139 | |
f05b9d93 | 10140 | |
d764a8e6 IS |
10141 | /* Encode type qualifiers encodes one of the "PQ" Objective-C |
10142 | keywords, ie 'in', 'out', 'inout', 'bycopy', 'byref', 'oneway'. | |
10143 | 'const', instead, is encoded directly as part of the type. | |
10144 | */ | |
f05b9d93 | 10145 | |
d764a8e6 IS |
10146 | static void |
10147 | encode_type_qualifiers (tree declspecs) | |
10148 | { | |
10149 | tree spec; | |
f05b9d93 | 10150 | |
d764a8e6 IS |
10151 | for (spec = declspecs; spec; spec = TREE_CHAIN (spec)) |
10152 | { | |
10153 | /* FIXME: Shouldn't we use token->keyword here ? */ | |
10154 | if (ridpointers[(int) RID_IN] == TREE_VALUE (spec)) | |
10155 | obstack_1grow (&util_obstack, 'n'); | |
10156 | else if (ridpointers[(int) RID_INOUT] == TREE_VALUE (spec)) | |
10157 | obstack_1grow (&util_obstack, 'N'); | |
10158 | else if (ridpointers[(int) RID_OUT] == TREE_VALUE (spec)) | |
10159 | obstack_1grow (&util_obstack, 'o'); | |
10160 | else if (ridpointers[(int) RID_BYCOPY] == TREE_VALUE (spec)) | |
10161 | obstack_1grow (&util_obstack, 'O'); | |
10162 | else if (ridpointers[(int) RID_BYREF] == TREE_VALUE (spec)) | |
10163 | obstack_1grow (&util_obstack, 'R'); | |
10164 | else if (ridpointers[(int) RID_ONEWAY] == TREE_VALUE (spec)) | |
10165 | obstack_1grow (&util_obstack, 'V'); | |
10166 | else | |
10167 | gcc_unreachable (); | |
10168 | } | |
10169 | } | |
f05b9d93 | 10170 | |
d764a8e6 IS |
10171 | /* Determine if a pointee is marked read-only. Only used by the NeXT |
10172 | runtime to be compatible with gcc-3.3. */ | |
f05b9d93 | 10173 | |
d764a8e6 IS |
10174 | static bool |
10175 | pointee_is_readonly (tree pointee) | |
10176 | { | |
10177 | while (POINTER_TYPE_P (pointee)) | |
10178 | pointee = TREE_TYPE (pointee); | |
22d8d616 | 10179 | |
d764a8e6 IS |
10180 | return TYPE_READONLY (pointee); |
10181 | } | |
f05b9d93 | 10182 | |
d764a8e6 | 10183 | /* Encode a pointer type. */ |
f05b9d93 | 10184 | |
d764a8e6 IS |
10185 | static void |
10186 | encode_pointer (tree type, int curtype, int format) | |
10187 | { | |
10188 | tree pointer_to = TREE_TYPE (type); | |
10189 | ||
10190 | if (flag_next_runtime) | |
f05b9d93 | 10191 | { |
d764a8e6 IS |
10192 | /* This code is used to be compatible with gcc-3.3. */ |
10193 | /* For historical/compatibility reasons, the read-only qualifier | |
10194 | of the pointee gets emitted _before_ the '^'. The read-only | |
10195 | qualifier of the pointer itself gets ignored, _unless_ we are | |
10196 | looking at a typedef! Also, do not emit the 'r' for anything | |
10197 | but the outermost type! */ | |
10198 | if (!generating_instance_variables | |
10199 | && (obstack_object_size (&util_obstack) - curtype <= 1) | |
10200 | && (TYPE_NAME (type) && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL | |
10201 | ? TYPE_READONLY (type) | |
10202 | : pointee_is_readonly (pointer_to))) | |
10203 | obstack_1grow (&util_obstack, 'r'); | |
f05b9d93 NP |
10204 | } |
10205 | ||
d764a8e6 | 10206 | if (TREE_CODE (pointer_to) == RECORD_TYPE) |
f05b9d93 | 10207 | { |
d764a8e6 IS |
10208 | if (OBJC_TYPE_NAME (pointer_to) |
10209 | && TREE_CODE (OBJC_TYPE_NAME (pointer_to)) == IDENTIFIER_NODE) | |
10210 | { | |
10211 | const char *name = IDENTIFIER_POINTER (OBJC_TYPE_NAME (pointer_to)); | |
10212 | ||
10213 | if (strcmp (name, TAG_OBJECT) == 0) /* '@' */ | |
10214 | { | |
10215 | obstack_1grow (&util_obstack, '@'); | |
10216 | return; | |
10217 | } | |
10218 | else if (TYPE_HAS_OBJC_INFO (pointer_to) | |
10219 | && TYPE_OBJC_INTERFACE (pointer_to)) | |
10220 | { | |
10221 | if (generating_instance_variables) | |
10222 | { | |
10223 | obstack_1grow (&util_obstack, '@'); | |
10224 | obstack_1grow (&util_obstack, '"'); | |
10225 | obstack_grow (&util_obstack, name, strlen (name)); | |
10226 | obstack_1grow (&util_obstack, '"'); | |
10227 | return; | |
10228 | } | |
10229 | else | |
10230 | { | |
10231 | obstack_1grow (&util_obstack, '@'); | |
10232 | return; | |
10233 | } | |
10234 | } | |
10235 | else if (strcmp (name, TAG_CLASS) == 0) /* '#' */ | |
10236 | { | |
10237 | obstack_1grow (&util_obstack, '#'); | |
10238 | return; | |
10239 | } | |
10240 | else if (strcmp (name, TAG_SELECTOR) == 0) /* ':' */ | |
10241 | { | |
10242 | obstack_1grow (&util_obstack, ':'); | |
10243 | return; | |
10244 | } | |
10245 | } | |
f05b9d93 | 10246 | } |
d764a8e6 IS |
10247 | else if (TREE_CODE (pointer_to) == INTEGER_TYPE |
10248 | && TYPE_MODE (pointer_to) == QImode) | |
10249 | { | |
10250 | tree pname = TREE_CODE (OBJC_TYPE_NAME (pointer_to)) == IDENTIFIER_NODE | |
10251 | ? OBJC_TYPE_NAME (pointer_to) | |
10252 | : DECL_NAME (OBJC_TYPE_NAME (pointer_to)); | |
f05b9d93 | 10253 | |
d764a8e6 IS |
10254 | /* (BOOL *) are an exception and are encoded as ^c, while all |
10255 | other pointers to char are encoded as *. */ | |
10256 | if (strcmp (IDENTIFIER_POINTER (pname), "BOOL")) | |
10257 | { | |
10258 | if (!flag_next_runtime) | |
10259 | { | |
10260 | /* The NeXT runtime adds the 'r' before getting here. */ | |
f05b9d93 | 10261 | |
d764a8e6 IS |
10262 | /* It appears that "r*" means "const char *" rather than |
10263 | "char *const". "char *const" is encoded as "*", | |
10264 | which is identical to "char *", so the "const" is | |
944fb799 | 10265 | unfortunately lost. */ |
d764a8e6 IS |
10266 | if (TYPE_READONLY (pointer_to)) |
10267 | obstack_1grow (&util_obstack, 'r'); | |
10268 | } | |
10269 | ||
10270 | obstack_1grow (&util_obstack, '*'); | |
10271 | return; | |
10272 | } | |
10273 | } | |
10274 | ||
10275 | /* We have a normal pointer type that does not get special treatment. */ | |
10276 | obstack_1grow (&util_obstack, '^'); | |
10277 | encode_type (pointer_to, curtype, format); | |
10278 | } | |
10279 | ||
10280 | static void | |
10281 | encode_array (tree type, int curtype, int format) | |
10282 | { | |
10283 | tree an_int_cst = TYPE_SIZE (type); | |
10284 | tree array_of = TREE_TYPE (type); | |
10285 | char buffer[40]; | |
944fb799 | 10286 | |
d764a8e6 IS |
10287 | if (an_int_cst == NULL) |
10288 | { | |
10289 | /* We are trying to encode an incomplete array. An incomplete | |
4597541a NP |
10290 | array is forbidden as part of an instance variable; but it |
10291 | may occur if the instance variable is a pointer to such an | |
10292 | array. */ | |
10293 | ||
10294 | /* So the only case in which an incomplete array could occur | |
10295 | (without being pointed to) is if we are encoding the | |
10296 | arguments or return value of a method. In that case, an | |
10297 | incomplete array argument or return value (eg, | |
10298 | -(void)display: (char[])string) is treated like a pointer | |
10299 | because that is how the compiler does the function call. A | |
10300 | special, more complicated case, is when the incomplete array | |
10301 | is the last member of a struct (eg, if we are encoding | |
10302 | "struct { unsigned long int a;double b[];}"), which is again | |
10303 | part of a method argument/return value. In that case, we | |
10304 | really need to communicate to the runtime that there is an | |
10305 | incomplete array (not a pointer!) there. So, we detect that | |
10306 | special case and encode it as a zero-length array. | |
d764a8e6 IS |
10307 | |
10308 | Try to detect that we are part of a struct. We do this by | |
10309 | searching for '=' in the type encoding for the current type. | |
10310 | NB: This hack assumes that you can't use '=' as part of a C | |
10311 | identifier. | |
10312 | */ | |
f05b9d93 | 10313 | { |
d764a8e6 | 10314 | char *enc = obstack_base (&util_obstack) + curtype; |
944fb799 | 10315 | if (memchr (enc, '=', |
d764a8e6 | 10316 | obstack_object_size (&util_obstack) - curtype) == NULL) |
f05b9d93 | 10317 | { |
d764a8e6 IS |
10318 | /* We are not inside a struct. Encode the array as a |
10319 | pointer. */ | |
10320 | encode_pointer (type, curtype, format); | |
10321 | return; | |
f05b9d93 NP |
10322 | } |
10323 | } | |
f05b9d93 | 10324 | |
d764a8e6 IS |
10325 | /* Else, we are in a struct, and we encode it as a zero-length |
10326 | array. */ | |
10327 | sprintf (buffer, "[" HOST_WIDE_INT_PRINT_DEC, (HOST_WIDE_INT)0); | |
10328 | } | |
10329 | else if (TREE_INT_CST_LOW (TYPE_SIZE (array_of)) == 0) | |
10330 | sprintf (buffer, "[" HOST_WIDE_INT_PRINT_DEC, (HOST_WIDE_INT)0); | |
10331 | else | |
10332 | sprintf (buffer, "[" HOST_WIDE_INT_PRINT_DEC, | |
10333 | TREE_INT_CST_LOW (an_int_cst) | |
10334 | / TREE_INT_CST_LOW (TYPE_SIZE (array_of))); | |
69a97201 | 10335 | |
d764a8e6 IS |
10336 | obstack_grow (&util_obstack, buffer, strlen (buffer)); |
10337 | encode_type (array_of, curtype, format); | |
10338 | obstack_1grow (&util_obstack, ']'); | |
10339 | return; | |
10340 | } | |
69a97201 | 10341 | |
d764a8e6 IS |
10342 | /* Encode a vector. The vector type is a GCC extension to C. */ |
10343 | static void | |
10344 | encode_vector (tree type, int curtype, int format) | |
10345 | { | |
10346 | tree vector_of = TREE_TYPE (type); | |
10347 | char buffer[40]; | |
69a97201 | 10348 | |
d764a8e6 | 10349 | /* Vectors are like simple fixed-size arrays. */ |
f05b9d93 | 10350 | |
d764a8e6 IS |
10351 | /* Output ![xx,yy,<code>] where xx is the vector_size, yy is the |
10352 | alignment of the vector, and <code> is the base type. Eg, int | |
10353 | __attribute__ ((vector_size (16))) gets encoded as ![16,32,i] | |
10354 | assuming that the alignment is 32 bytes. We include size and | |
10355 | alignment in bytes so that the runtime does not have to have any | |
10356 | knowledge of the actual types. | |
10357 | */ | |
10358 | sprintf (buffer, "![" HOST_WIDE_INT_PRINT_DEC ",%d", | |
10359 | /* We want to compute the equivalent of sizeof (<vector>). | |
10360 | Code inspired by c_sizeof_or_alignof_type. */ | |
944fb799 | 10361 | ((TREE_INT_CST_LOW (TYPE_SIZE_UNIT (type)) |
d764a8e6 IS |
10362 | / (TYPE_PRECISION (char_type_node) / BITS_PER_UNIT))), |
10363 | /* We want to compute the equivalent of __alignof__ | |
10364 | (<vector>). Code inspired by | |
10365 | c_sizeof_or_alignof_type. */ | |
10366 | TYPE_ALIGN_UNIT (type)); | |
10367 | obstack_grow (&util_obstack, buffer, strlen (buffer)); | |
10368 | encode_type (vector_of, curtype, format); | |
10369 | obstack_1grow (&util_obstack, ']'); | |
10370 | return; | |
10371 | } | |
10372 | \f | |
10373 | static void | |
10374 | encode_aggregate_fields (tree type, bool pointed_to, int curtype, int format) | |
10375 | { | |
10376 | tree field = TYPE_FIELDS (type); | |
f05b9d93 | 10377 | |
d764a8e6 IS |
10378 | for (; field; field = DECL_CHAIN (field)) |
10379 | { | |
10380 | #ifdef OBJCPLUS | |
10381 | /* C++ static members, and things that are not field at all, | |
10382 | should not appear in the encoding. */ | |
10383 | if (TREE_CODE (field) != FIELD_DECL || TREE_STATIC (field)) | |
10384 | continue; | |
10385 | #endif | |
f05b9d93 | 10386 | |
d764a8e6 IS |
10387 | /* Recursively encode fields of embedded base classes. */ |
10388 | if (DECL_ARTIFICIAL (field) && !DECL_NAME (field) | |
10389 | && TREE_CODE (TREE_TYPE (field)) == RECORD_TYPE) | |
10390 | { | |
10391 | encode_aggregate_fields (TREE_TYPE (field), | |
10392 | pointed_to, curtype, format); | |
10393 | continue; | |
10394 | } | |
f05b9d93 | 10395 | |
d764a8e6 IS |
10396 | if (generating_instance_variables && !pointed_to) |
10397 | { | |
10398 | tree fname = DECL_NAME (field); | |
f05b9d93 | 10399 | |
d764a8e6 | 10400 | obstack_1grow (&util_obstack, '"'); |
f05b9d93 | 10401 | |
d764a8e6 IS |
10402 | if (fname && TREE_CODE (fname) == IDENTIFIER_NODE) |
10403 | obstack_grow (&util_obstack, | |
10404 | IDENTIFIER_POINTER (fname), | |
10405 | strlen (IDENTIFIER_POINTER (fname))); | |
f05b9d93 | 10406 | |
d764a8e6 IS |
10407 | obstack_1grow (&util_obstack, '"'); |
10408 | } | |
f05b9d93 | 10409 | |
d764a8e6 | 10410 | encode_field_decl (field, curtype, format); |
f05b9d93 | 10411 | } |
d764a8e6 | 10412 | } |
f05b9d93 | 10413 | |
d764a8e6 IS |
10414 | static void |
10415 | encode_aggregate_within (tree type, int curtype, int format, int left, | |
10416 | int right) | |
10417 | { | |
10418 | tree name; | |
10419 | /* NB: aggregates that are pointed to have slightly different encoding | |
10420 | rules in that you never encode the names of instance variables. */ | |
10421 | int ob_size = obstack_object_size (&util_obstack); | |
10422 | bool inline_contents = false; | |
10423 | bool pointed_to = false; | |
f05b9d93 | 10424 | |
d764a8e6 IS |
10425 | if (flag_next_runtime) |
10426 | { | |
10427 | if (ob_size > 0 && *(obstack_next_free (&util_obstack) - 1) == '^') | |
10428 | pointed_to = true; | |
f05b9d93 | 10429 | |
d764a8e6 IS |
10430 | if ((format == OBJC_ENCODE_INLINE_DEFS || generating_instance_variables) |
10431 | && (!pointed_to || ob_size - curtype == 1 | |
10432 | || (ob_size - curtype == 2 | |
10433 | && *(obstack_next_free (&util_obstack) - 2) == 'r'))) | |
10434 | inline_contents = true; | |
10435 | } | |
10436 | else | |
10437 | { | |
10438 | /* c0 and c1 are the last two characters in the encoding of the | |
10439 | current type; if the last two characters were '^' or '^r', | |
10440 | then we are encoding an aggregate that is "pointed to". The | |
10441 | comment above applies: in that case we should avoid encoding | |
10442 | the names of instance variables. | |
10443 | */ | |
10444 | char c1 = ob_size > 1 ? *(obstack_next_free (&util_obstack) - 2) : 0; | |
10445 | char c0 = ob_size > 0 ? *(obstack_next_free (&util_obstack) - 1) : 0; | |
944fb799 | 10446 | |
d764a8e6 IS |
10447 | if (c0 == '^' || (c1 == '^' && c0 == 'r')) |
10448 | pointed_to = true; | |
944fb799 | 10449 | |
d764a8e6 IS |
10450 | if (format == OBJC_ENCODE_INLINE_DEFS || generating_instance_variables) |
10451 | { | |
10452 | if (!pointed_to) | |
10453 | inline_contents = true; | |
10454 | else | |
10455 | { | |
10456 | /* Note that the check (ob_size - curtype < 2) prevents | |
10457 | infinite recursion when encoding a structure which is | |
10458 | a linked list (eg, struct node { struct node *next; | |
10459 | }). Each time we follow a pointer, we add one | |
10460 | character to ob_size, and curtype is fixed, so after | |
10461 | at most two pointers we stop inlining contents and | |
10462 | break the loop. | |
f05b9d93 | 10463 | |
d764a8e6 IS |
10464 | The other case where we don't inline is "^r", which |
10465 | is a pointer to a constant struct. | |
10466 | */ | |
10467 | if ((ob_size - curtype <= 2) && !(c0 == 'r')) | |
10468 | inline_contents = true; | |
10469 | } | |
10470 | } | |
10471 | } | |
f05b9d93 | 10472 | |
d764a8e6 IS |
10473 | /* Traverse struct aliases; it is important to get the |
10474 | original struct and its tag name (if any). */ | |
10475 | type = TYPE_MAIN_VARIANT (type); | |
10476 | name = OBJC_TYPE_NAME (type); | |
10477 | /* Open parenth/bracket. */ | |
10478 | obstack_1grow (&util_obstack, left); | |
f05b9d93 | 10479 | |
d764a8e6 IS |
10480 | /* Encode the struct/union tag name, or '?' if a tag was |
10481 | not provided. Typedef aliases do not qualify. */ | |
10482 | #ifdef OBJCPLUS | |
10483 | /* For compatibility with the NeXT runtime, ObjC++ encodes template | |
10484 | args as a composite struct tag name. */ | |
10485 | if (name && TREE_CODE (name) == IDENTIFIER_NODE | |
10486 | /* Did this struct have a tag? */ | |
10487 | && !TYPE_WAS_ANONYMOUS (type)) | |
10488 | obstack_grow (&util_obstack, | |
10489 | decl_as_string (type, TFF_DECL_SPECIFIERS | TFF_UNQUALIFIED_NAME), | |
10490 | strlen (decl_as_string (type, TFF_DECL_SPECIFIERS | TFF_UNQUALIFIED_NAME))); | |
10491 | #else | |
10492 | if (name && TREE_CODE (name) == IDENTIFIER_NODE) | |
10493 | obstack_grow (&util_obstack, | |
10494 | IDENTIFIER_POINTER (name), | |
10495 | strlen (IDENTIFIER_POINTER (name))); | |
10496 | #endif | |
10497 | else | |
10498 | obstack_1grow (&util_obstack, '?'); | |
f05b9d93 | 10499 | |
d764a8e6 IS |
10500 | /* Encode the types (and possibly names) of the inner fields, |
10501 | if required. */ | |
10502 | if (inline_contents) | |
10503 | { | |
10504 | obstack_1grow (&util_obstack, '='); | |
10505 | encode_aggregate_fields (type, pointed_to, curtype, format); | |
10506 | } | |
10507 | /* Close parenth/bracket. */ | |
10508 | obstack_1grow (&util_obstack, right); | |
10509 | } | |
f05b9d93 | 10510 | |
d764a8e6 IS |
10511 | /* Encode a bitfield NeXT-style (i.e., without a bit offset or the underlying |
10512 | field type. */ | |
f05b9d93 | 10513 | |
d764a8e6 IS |
10514 | static void |
10515 | encode_next_bitfield (int width) | |
10516 | { | |
10517 | char buffer[40]; | |
10518 | sprintf (buffer, "b%d", width); | |
10519 | obstack_grow (&util_obstack, buffer, strlen (buffer)); | |
10520 | } | |
f05b9d93 | 10521 | |
d764a8e6 IS |
10522 | /* Encodes 'type', ignoring type qualifiers (which you should encode |
10523 | beforehand if needed) with the exception of 'const', which is | |
10524 | encoded by encode_type. See above for the explanation of | |
10525 | 'curtype'. 'format' can be OBJC_ENCODE_INLINE_DEFS or | |
10526 | OBJC_ENCODE_DONT_INLINE_DEFS. | |
10527 | */ | |
10528 | static void | |
10529 | encode_type (tree type, int curtype, int format) | |
10530 | { | |
10531 | enum tree_code code = TREE_CODE (type); | |
f05b9d93 | 10532 | |
d764a8e6 IS |
10533 | /* Ignore type qualifiers other than 'const' when encoding a |
10534 | type. */ | |
f05b9d93 | 10535 | |
d764a8e6 IS |
10536 | if (type == error_mark_node) |
10537 | return; | |
f05b9d93 | 10538 | |
d764a8e6 | 10539 | if (!flag_next_runtime) |
f05b9d93 | 10540 | { |
d764a8e6 IS |
10541 | if (TYPE_READONLY (type)) |
10542 | obstack_1grow (&util_obstack, 'r'); | |
f05b9d93 NP |
10543 | } |
10544 | ||
d764a8e6 IS |
10545 | switch (code) |
10546 | { | |
10547 | case ENUMERAL_TYPE: | |
10548 | if (flag_next_runtime) | |
10549 | { | |
10550 | /* Kludge for backwards-compatibility with gcc-3.3: enums | |
10551 | are always encoded as 'i' no matter what type they | |
10552 | actually are (!). */ | |
10553 | obstack_1grow (&util_obstack, 'i'); | |
10554 | break; | |
10555 | } | |
10556 | /* Else, they are encoded exactly like the integer type that is | |
10557 | used by the compiler to store them. */ | |
10558 | case INTEGER_TYPE: | |
10559 | { | |
10560 | char c; | |
10561 | switch (GET_MODE_BITSIZE (TYPE_MODE (type))) | |
10562 | { | |
10563 | case 8: c = TYPE_UNSIGNED (type) ? 'C' : 'c'; break; | |
10564 | case 16: c = TYPE_UNSIGNED (type) ? 'S' : 's'; break; | |
10565 | case 32: | |
10566 | { | |
10567 | tree int_type = type; | |
10568 | if (flag_next_runtime) | |
10569 | { | |
10570 | /* Another legacy kludge for compatiblity with | |
10571 | gcc-3.3: 32-bit longs are encoded as 'l' or 'L', | |
10572 | but not always. For typedefs, we need to use 'i' | |
10573 | or 'I' instead if encoding a struct field, or a | |
10574 | pointer! */ | |
10575 | int_type = ((!generating_instance_variables | |
10576 | && (obstack_object_size (&util_obstack) | |
10577 | == (unsigned) curtype)) | |
10578 | ? TYPE_MAIN_VARIANT (type) | |
10579 | : type); | |
10580 | } | |
10581 | if (int_type == long_unsigned_type_node | |
10582 | || int_type == long_integer_type_node) | |
10583 | c = TYPE_UNSIGNED (type) ? 'L' : 'l'; | |
10584 | else | |
10585 | c = TYPE_UNSIGNED (type) ? 'I' : 'i'; | |
10586 | } | |
10587 | break; | |
10588 | case 64: c = TYPE_UNSIGNED (type) ? 'Q' : 'q'; break; | |
10589 | case 128: c = TYPE_UNSIGNED (type) ? 'T' : 't'; break; | |
10590 | default: gcc_unreachable (); | |
10591 | } | |
10592 | obstack_1grow (&util_obstack, c); | |
10593 | break; | |
10594 | } | |
10595 | case REAL_TYPE: | |
10596 | { | |
10597 | char c; | |
10598 | /* Floating point types. */ | |
10599 | switch (GET_MODE_BITSIZE (TYPE_MODE (type))) | |
10600 | { | |
10601 | case 32: c = 'f'; break; | |
10602 | case 64: c = 'd'; break; | |
10603 | case 96: | |
10604 | case 128: c = 'D'; break; | |
10605 | default: gcc_unreachable (); | |
10606 | } | |
10607 | obstack_1grow (&util_obstack, c); | |
10608 | break; | |
10609 | } | |
10610 | case VOID_TYPE: | |
10611 | obstack_1grow (&util_obstack, 'v'); | |
10612 | break; | |
10613 | ||
10614 | case BOOLEAN_TYPE: | |
10615 | obstack_1grow (&util_obstack, 'B'); | |
10616 | break; | |
10617 | ||
10618 | case ARRAY_TYPE: | |
10619 | encode_array (type, curtype, format); | |
10620 | break; | |
f05b9d93 | 10621 | |
d764a8e6 | 10622 | case POINTER_TYPE: |
f05b9d93 | 10623 | #ifdef OBJCPLUS |
d764a8e6 | 10624 | case REFERENCE_TYPE: |
f05b9d93 | 10625 | #endif |
d764a8e6 IS |
10626 | encode_pointer (type, curtype, format); |
10627 | break; | |
f05b9d93 | 10628 | |
d764a8e6 IS |
10629 | case RECORD_TYPE: |
10630 | encode_aggregate_within (type, curtype, format, '{', '}'); | |
10631 | break; | |
f05b9d93 | 10632 | |
d764a8e6 IS |
10633 | case UNION_TYPE: |
10634 | encode_aggregate_within (type, curtype, format, '(', ')'); | |
10635 | break; | |
f05b9d93 | 10636 | |
d764a8e6 IS |
10637 | case FUNCTION_TYPE: /* '?' means an unknown type. */ |
10638 | obstack_1grow (&util_obstack, '?'); | |
10639 | break; | |
f05b9d93 | 10640 | |
d764a8e6 IS |
10641 | case COMPLEX_TYPE: |
10642 | /* A complex is encoded as 'j' followed by the inner type (eg, | |
10643 | "_Complex int" is encoded as 'ji'). */ | |
10644 | obstack_1grow (&util_obstack, 'j'); | |
10645 | encode_type (TREE_TYPE (type), curtype, format); | |
10646 | break; | |
10647 | ||
10648 | case VECTOR_TYPE: | |
10649 | encode_vector (type, curtype, format); | |
10650 | break; | |
10651 | ||
10652 | default: | |
10653 | warning (0, "unknown type %s found during Objective-C encoding", | |
10654 | gen_type_name (type)); | |
10655 | obstack_1grow (&util_obstack, '?'); | |
10656 | break; | |
10657 | } | |
944fb799 | 10658 | |
d764a8e6 | 10659 | if (flag_next_runtime) |
f05b9d93 | 10660 | { |
d764a8e6 IS |
10661 | /* Super-kludge. Some ObjC qualifier and type combinations need |
10662 | to be rearranged for compatibility with gcc-3.3. */ | |
10663 | if (code == POINTER_TYPE && obstack_object_size (&util_obstack) >= 3) | |
10664 | { | |
10665 | char *enc = obstack_base (&util_obstack) + curtype; | |
944fb799 | 10666 | |
d764a8e6 IS |
10667 | /* Rewrite "in const" from "nr" to "rn". */ |
10668 | if (curtype >= 1 && !strncmp (enc - 1, "nr", 2)) | |
10669 | strncpy (enc - 1, "rn", 2); | |
10670 | } | |
f05b9d93 | 10671 | } |
d764a8e6 | 10672 | } |
f05b9d93 | 10673 | |
d764a8e6 IS |
10674 | static void |
10675 | encode_gnu_bitfield (int position, tree type, int size) | |
10676 | { | |
10677 | enum tree_code code = TREE_CODE (type); | |
10678 | char buffer[40]; | |
10679 | char charType = '?'; | |
f05b9d93 | 10680 | |
d764a8e6 IS |
10681 | /* This code is only executed for the GNU runtime, so we can ignore |
10682 | the NeXT runtime kludge of always encoding enums as 'i' no matter | |
10683 | what integers they actually are. */ | |
10684 | if (code == INTEGER_TYPE || code == ENUMERAL_TYPE) | |
10685 | { | |
10686 | if (integer_zerop (TYPE_MIN_VALUE (type))) | |
10687 | /* Unsigned integer types. */ | |
10688 | { | |
10689 | switch (TYPE_MODE (type)) | |
10690 | { | |
10691 | case QImode: | |
10692 | charType = 'C'; break; | |
10693 | case HImode: | |
10694 | charType = 'S'; break; | |
10695 | case SImode: | |
10696 | { | |
10697 | if (type == long_unsigned_type_node) | |
10698 | charType = 'L'; | |
10699 | else | |
10700 | charType = 'I'; | |
10701 | break; | |
10702 | } | |
10703 | case DImode: | |
10704 | charType = 'Q'; break; | |
10705 | default: | |
10706 | gcc_unreachable (); | |
10707 | } | |
10708 | } | |
10709 | else | |
10710 | /* Signed integer types. */ | |
10711 | { | |
10712 | switch (TYPE_MODE (type)) | |
10713 | { | |
10714 | case QImode: | |
10715 | charType = 'c'; break; | |
10716 | case HImode: | |
10717 | charType = 's'; break; | |
10718 | case SImode: | |
10719 | { | |
10720 | if (type == long_integer_type_node) | |
10721 | charType = 'l'; | |
10722 | else | |
10723 | charType = 'i'; | |
10724 | break; | |
10725 | } | |
10726 | case DImode: | |
10727 | charType = 'q'; break; | |
10728 | default: | |
10729 | gcc_unreachable (); | |
10730 | } | |
10731 | } | |
10732 | } | |
10733 | else | |
10734 | { | |
10735 | /* Do not do any encoding, produce an error and keep going. */ | |
10736 | error ("trying to encode non-integer type as a bitfield"); | |
10737 | return; | |
10738 | } | |
f05b9d93 | 10739 | |
d764a8e6 IS |
10740 | sprintf (buffer, "b%d%c%d", position, charType, size); |
10741 | obstack_grow (&util_obstack, buffer, strlen (buffer)); | |
10742 | } | |
10743 | ||
10744 | void | |
10745 | encode_field_decl (tree field_decl, int curtype, int format) | |
10746 | { | |
10747 | #ifdef OBJCPLUS | |
10748 | /* C++ static members, and things that are not fields at all, | |
10749 | should not appear in the encoding. */ | |
10750 | if (TREE_CODE (field_decl) != FIELD_DECL || TREE_STATIC (field_decl)) | |
10751 | return; | |
f05b9d93 NP |
10752 | #endif |
10753 | ||
d764a8e6 IS |
10754 | /* Generate the bitfield typing information, if needed. Note the difference |
10755 | between GNU and NeXT runtimes. */ | |
10756 | if (DECL_BIT_FIELD_TYPE (field_decl)) | |
10757 | { | |
10758 | int size = tree_low_cst (DECL_SIZE (field_decl), 1); | |
10759 | ||
10760 | if (flag_next_runtime) | |
10761 | encode_next_bitfield (size); | |
10762 | else | |
10763 | encode_gnu_bitfield (int_bit_position (field_decl), | |
10764 | DECL_BIT_FIELD_TYPE (field_decl), size); | |
10765 | } | |
10766 | else | |
10767 | encode_type (TREE_TYPE (field_decl), curtype, format); | |
f05b9d93 NP |
10768 | } |
10769 | ||
d4c433f9 NP |
10770 | /* This routine encodes the attribute of the input PROPERTY according |
10771 | to following formula: | |
10772 | ||
10773 | Property attributes are stored as a comma-delimited C string. | |
10774 | Simple attributes such as readonly are encoded as single | |
10775 | character. The parametrized attributes, getter=name and | |
10776 | setter=name, are encoded as a single character followed by an | |
10777 | identifier. Property types are also encoded as a parametrized | |
10778 | attribute. The characters used to encode these attributes are | |
10779 | defined by the following enumeration: | |
10780 | ||
10781 | enum PropertyAttributes { | |
10782 | kPropertyReadOnly = 'R', | |
10783 | kPropertyBycopy = 'C', | |
10784 | kPropertyByref = '&', | |
10785 | kPropertyDynamic = 'D', | |
10786 | kPropertyGetter = 'G', | |
10787 | kPropertySetter = 'S', | |
10788 | kPropertyInstanceVariable = 'V', | |
39113df1 | 10789 | kPropertyType = 'T', |
d4c433f9 | 10790 | kPropertyWeak = 'W', |
39113df1 | 10791 | kPropertyStrong = 'P', |
d4c433f9 | 10792 | kPropertyNonAtomic = 'N' |
39113df1 | 10793 | }; */ |
d764a8e6 IS |
10794 | tree |
10795 | objc_v2_encode_prop_attr (tree property) | |
91ebb981 | 10796 | { |
d764a8e6 IS |
10797 | const char *string; |
10798 | tree type = TREE_TYPE (property); | |
39113df1 NP |
10799 | |
10800 | obstack_1grow (&util_obstack, 'T'); | |
d764a8e6 IS |
10801 | encode_type (type, obstack_object_size (&util_obstack), |
10802 | OBJC_ENCODE_INLINE_DEFS); | |
39113df1 | 10803 | |
d764a8e6 | 10804 | if (PROPERTY_READONLY (property)) |
39113df1 NP |
10805 | obstack_grow (&util_obstack, ",R", 2); |
10806 | ||
10807 | switch (PROPERTY_ASSIGN_SEMANTICS (property)) | |
10808 | { | |
10809 | case OBJC_PROPERTY_COPY: | |
10810 | obstack_grow (&util_obstack, ",C", 2); | |
10811 | break; | |
10812 | case OBJC_PROPERTY_RETAIN: | |
10813 | obstack_grow (&util_obstack, ",&", 2); | |
10814 | break; | |
10815 | case OBJC_PROPERTY_ASSIGN: | |
10816 | default: | |
10817 | break; | |
10818 | } | |
d764a8e6 | 10819 | |
39113df1 | 10820 | if (PROPERTY_DYNAMIC (property)) |
944fb799 | 10821 | obstack_grow (&util_obstack, ",D", 2); |
d764a8e6 | 10822 | |
39113df1 NP |
10823 | if (PROPERTY_NONATOMIC (property)) |
10824 | obstack_grow (&util_obstack, ",N", 2); | |
10825 | ||
10826 | /* Here we want to encode the getter name, but only if it's not the | |
10827 | standard one. */ | |
10828 | if (PROPERTY_GETTER_NAME (property) != PROPERTY_NAME (property)) | |
d764a8e6 | 10829 | { |
39113df1 | 10830 | obstack_grow (&util_obstack, ",G", 2); |
d764a8e6 IS |
10831 | string = IDENTIFIER_POINTER (PROPERTY_GETTER_NAME (property)); |
10832 | obstack_grow (&util_obstack, string, strlen (string)); | |
10833 | } | |
39113df1 NP |
10834 | |
10835 | if (!PROPERTY_READONLY (property)) | |
d764a8e6 | 10836 | { |
39113df1 NP |
10837 | /* Here we want to encode the setter name, but only if it's not |
10838 | the standard one. */ | |
10839 | tree standard_setter = get_identifier (objc_build_property_setter_name (PROPERTY_NAME (property))); | |
10840 | if (PROPERTY_SETTER_NAME (property) != standard_setter) | |
10841 | { | |
10842 | obstack_grow (&util_obstack, ",S", 2); | |
10843 | string = IDENTIFIER_POINTER (PROPERTY_SETTER_NAME (property)); | |
10844 | obstack_grow (&util_obstack, string, strlen (string)); | |
10845 | } | |
d764a8e6 | 10846 | } |
39113df1 NP |
10847 | |
10848 | /* TODO: Encode strong ('P'), weak ('W') for garbage collection. */ | |
10849 | ||
10850 | if (!PROPERTY_DYNAMIC (property)) | |
d764a8e6 | 10851 | { |
39113df1 NP |
10852 | obstack_grow (&util_obstack, ",V", 2); |
10853 | if (PROPERTY_IVAR_NAME (property)) | |
10854 | string = IDENTIFIER_POINTER (PROPERTY_IVAR_NAME (property)); | |
10855 | else | |
10856 | string = IDENTIFIER_POINTER (PROPERTY_NAME (property)); | |
d764a8e6 IS |
10857 | obstack_grow (&util_obstack, string, strlen (string)); |
10858 | } | |
39113df1 NP |
10859 | |
10860 | /* NULL-terminate string. */ | |
10861 | obstack_1grow (&util_obstack, 0); | |
d764a8e6 IS |
10862 | string = XOBFINISH (&util_obstack, char *); |
10863 | obstack_free (&util_obstack, util_firstobj); | |
10864 | return get_identifier (string); | |
91ebb981 IS |
10865 | } |
10866 | ||
81f653d6 NF |
10867 | void |
10868 | objc_common_init_ts (void) | |
10869 | { | |
10870 | c_common_init_ts (); | |
10871 | ||
10872 | MARK_TS_DECL_NON_COMMON (CLASS_METHOD_DECL); | |
10873 | MARK_TS_DECL_NON_COMMON (INSTANCE_METHOD_DECL); | |
10874 | MARK_TS_DECL_NON_COMMON (KEYWORD_DECL); | |
10875 | MARK_TS_DECL_NON_COMMON (PROPERTY_DECL); | |
10876 | ||
10877 | MARK_TS_COMMON (CLASS_INTERFACE_TYPE); | |
10878 | MARK_TS_COMMON (PROTOCOL_INTERFACE_TYPE); | |
10879 | MARK_TS_COMMON (CLASS_IMPLEMENTATION_TYPE); | |
10880 | ||
10881 | MARK_TS_TYPED (MESSAGE_SEND_EXPR); | |
10882 | MARK_TS_TYPED (PROPERTY_REF); | |
10883 | } | |
10884 | ||
8643e92d | 10885 | #include "gt-objc-objc-act.h" |