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fc304191 | 1 | /* Implement classes and message passing for Objective C. |
d353bf18 | 2 | Copyright (C) 1992-2015 Free Software Foundation, Inc. |
51eb6608 | 3 | Contributed by Steve Naroff. |
fc304191 | 4 | |
e3708be9 | 5 | This file is part of GCC. |
fc304191 | 6 | |
e3708be9 | 7 | GCC is free software; you can redistribute it and/or modify |
fc304191 | 8 | it under the terms of the GNU General Public License as published by |
c3adda75 | 9 | the Free Software Foundation; either version 3, or (at your option) |
fc304191 | 10 | any later version. |
11 | ||
e3708be9 | 12 | GCC is distributed in the hope that it will be useful, |
fc304191 | 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
c3adda75 | 18 | along with GCC; see the file COPYING3. If not see |
19 | <http://www.gnu.org/licenses/>. */ | |
20 | ||
fc304191 | 21 | #include "config.h" |
47003e2a | 22 | #include "system.h" |
805e22b2 | 23 | #include "coretypes.h" |
24 | #include "tm.h" | |
b20a8bb4 | 25 | #include "alias.h" |
26 | #include "symtab.h" | |
27 | #include "options.h" | |
fc304191 | 28 | #include "tree.h" |
b20a8bb4 | 29 | #include "fold-const.h" |
9ed99284 | 30 | #include "stringpool.h" |
31 | #include "stor-layout.h" | |
32 | #include "attribs.h" | |
13dcc150 | 33 | |
34 | #ifdef OBJCPLUS | |
e53d55e7 | 35 | #include "cp/cp-tree.h" |
13dcc150 | 36 | #else |
e53d55e7 | 37 | #include "c/c-tree.h" |
38 | #include "c/c-lang.h" | |
13dcc150 | 39 | #endif |
40 | ||
7bedc3a0 | 41 | #include "c-family/c-common.h" |
6c536c4f | 42 | #include "c-family/c-objc.h" |
7bedc3a0 | 43 | #include "c-family/c-pragma.h" |
1f6616ee | 44 | #include "c-family/c-format.h" |
fc304191 | 45 | #include "flags.h" |
d1b92730 | 46 | #include "langhooks.h" |
1a62b6bf | 47 | #include "objc-act.h" |
f41791cf | 48 | #include "objc-map.h" |
a3020f2f | 49 | #include "hard-reg-set.h" |
c450c529 | 50 | #include "function.h" |
cd03a192 | 51 | #include "toplev.h" |
965ae951 | 52 | #include "debug.h" |
c94b1d0e | 53 | #include "c-family/c-target.h" |
852f689e | 54 | #include "diagnostic-core.h" |
a608187f | 55 | #include "intl.h" |
1140c305 | 56 | #include "plugin-api.h" |
57 | #include "ipa-ref.h" | |
376c21d1 | 58 | #include "cgraph.h" |
e24e8df7 | 59 | #include "tree-iterator.h" |
d7c168e8 | 60 | #include "langhooks-def.h" |
267785bc | 61 | /* Different initialization, code gen and meta data generation for each |
62 | runtime. */ | |
63 | #include "objc-runtime-hooks.h" | |
64 | /* Routines used mainly by the runtimes. */ | |
65 | #include "objc-runtime-shared-support.h" | |
40c8d1dd | 66 | /* For default_tree_printer (). */ |
67 | #include "tree-pretty-print.h" | |
68 | ||
c4b9c21a | 69 | /* For enum gimplify_status */ |
bc61cadb | 70 | #include "gimple-expr.h" |
a8783bee | 71 | #include "gimplify.h" |
c4b9c21a | 72 | |
f572c7ba | 73 | /* For encode_method_prototype(). */ |
74 | #include "objc-encoding.h" | |
75 | ||
0ced0389 | 76 | static unsigned int should_call_super_dealloc = 0; |
77 | ||
13dcc150 | 78 | /* When building Objective-C++, we are not linking against the C front-end |
79 | and so need to replicate the C tree-construction functions in some way. */ | |
80 | #ifdef OBJCPLUS | |
81 | #define OBJCP_REMAP_FUNCTIONS | |
82 | #include "objcp-decl.h" | |
83 | #endif /* OBJCPLUS */ | |
d74ae00c | 84 | |
0a1740b4 | 85 | /* This is the default way of generating a method name. */ |
e23bf1fb | 86 | /* This has the problem that "test_method:argument:" and |
87 | "test:method_argument:" will generate the same name | |
88 | ("_i_Test__test_method_argument_" for an instance method of the | |
89 | class "Test"), so you can't have them both in the same class! | |
90 | Moreover, the demangling (going from | |
91 | "_i_Test__test_method_argument" back to the original name) is | |
92 | undefined because there are two correct ways of demangling the | |
93 | name. */ | |
0a1740b4 | 94 | #ifndef OBJC_GEN_METHOD_LABEL |
ff059d05 | 95 | #define OBJC_GEN_METHOD_LABEL(BUF, IS_INST, CLASS_NAME, CAT_NAME, SEL_NAME, NUM) \ |
96 | do { \ | |
97 | char *temp; \ | |
98 | sprintf ((BUF), "_%s_%s_%s_%s", \ | |
99 | ((IS_INST) ? "i" : "c"), \ | |
100 | (CLASS_NAME), \ | |
101 | ((CAT_NAME)? (CAT_NAME) : ""), \ | |
102 | (SEL_NAME)); \ | |
103 | for (temp = (BUF); *temp; temp++) \ | |
104 | if (*temp == ':') *temp = '_'; \ | |
0a1740b4 | 105 | } while (0) |
0ad17d1b | 106 | #endif |
c450c529 | 107 | |
108 | /* These need specifying. */ | |
109 | #ifndef OBJC_FORWARDING_STACK_OFFSET | |
110 | #define OBJC_FORWARDING_STACK_OFFSET 0 | |
111 | #endif | |
112 | ||
113 | #ifndef OBJC_FORWARDING_MIN_OFFSET | |
114 | #define OBJC_FORWARDING_MIN_OFFSET 0 | |
115 | #endif | |
267785bc | 116 | |
fc304191 | 117 | /*** Private Interface (procedures) ***/ |
118 | ||
267785bc | 119 | /* Init stuff. */ |
120 | static void synth_module_prologue (void); | |
c450c529 | 121 | |
a92771b8 | 122 | /* Code generation. */ |
fc304191 | 123 | |
c1cfb0f5 | 124 | static tree start_class (enum tree_code, tree, tree, tree, tree); |
13dcc150 | 125 | static tree continue_class (tree); |
126 | static void finish_class (tree); | |
4232a958 | 127 | static void start_method_def (tree, tree); |
267785bc | 128 | |
c213e196 | 129 | static tree start_protocol (enum tree_code, tree, tree, tree); |
450302fe | 130 | static tree build_method_decl (enum tree_code, tree, tree, tree, bool); |
069761fb | 131 | static tree objc_add_method (tree, tree, int, bool); |
4a8875ed | 132 | static tree add_instance_variable (tree, objc_ivar_visibility_kind, tree); |
13dcc150 | 133 | static tree build_ivar_reference (tree); |
134 | static tree is_ivar (tree, tree); | |
13dcc150 | 135 | |
499ea517 | 136 | /* We only need the following for ObjC; ObjC++ will use C++'s definition |
137 | of DERIVED_FROM_P. */ | |
138 | #ifndef OBJCPLUS | |
139 | static bool objc_derived_from_p (tree, tree); | |
140 | #define DERIVED_FROM_P(PARENT, CHILD) objc_derived_from_p (PARENT, CHILD) | |
141 | #endif | |
86c110ac | 142 | |
143 | /* Property. */ | |
86c110ac | 144 | static void objc_gen_property_data (tree, tree); |
145 | static void objc_synthesize_getter (tree, tree, tree); | |
86c110ac | 146 | static void objc_synthesize_setter (tree, tree, tree); |
86c110ac | 147 | static tree lookup_property (tree, tree); |
148 | static tree lookup_property_in_list (tree, tree); | |
149 | static tree lookup_property_in_protocol_list (tree, tree); | |
267785bc | 150 | static void build_common_objc_property_accessor_helpers (void); |
86c110ac | 151 | |
499ea517 | 152 | static void objc_xref_basetypes (tree, tree); |
153 | ||
499ea517 | 154 | static tree get_class_ivars (tree, bool); |
39b8ddc6 | 155 | |
0a65c3bb | 156 | static void build_fast_enumeration_state_template (void); |
157 | ||
0ced0389 | 158 | #ifdef OBJCPLUS |
159 | static void objc_generate_cxx_cdtors (void); | |
160 | #endif | |
39b8ddc6 | 161 | |
40c8d1dd | 162 | /* objc attribute */ |
6bbb4715 | 163 | static void objc_decl_method_attributes (tree*, tree, int); |
40c8d1dd | 164 | static tree build_keyword_selector (tree); |
ebcbb79c | 165 | |
267785bc | 166 | static void hash_init (void); |
fc304191 | 167 | |
f41791cf | 168 | /* Hash tables to manage the global pool of method prototypes. Each |
169 | of these maps map a method name (selector) identifier to either a | |
170 | single tree (for methods with a single method prototype) or a | |
171 | TREE_VEC (for methods with multiple method prototypes). */ | |
172 | static GTY(()) objc_map_t instance_method_map = 0; | |
173 | static GTY(()) objc_map_t class_method_map = 0; | |
c450c529 | 174 | |
e9e7c336 | 175 | /* Hash tables to manage the global pool of class names. */ |
176 | ||
f41791cf | 177 | static GTY(()) objc_map_t class_name_map = 0; |
178 | static GTY(()) objc_map_t alias_name_map = 0; | |
e9e7c336 | 179 | |
39b8ddc6 | 180 | static tree lookup_method (tree, tree); |
c17b85ea | 181 | static tree lookup_method_static (tree, tree, int); |
c450c529 | 182 | |
f41791cf | 183 | static void interface_hash_init (void); |
184 | static tree add_interface (tree, tree); | |
86c110ac | 185 | static void add_category (tree, tree); |
186 | static inline tree lookup_category (tree, tree); | |
187 | ||
c213e196 | 188 | /* Protocols. */ |
c450c529 | 189 | |
89e83a91 | 190 | static tree lookup_protocol (tree, bool, bool); |
191 | static tree lookup_and_install_protocols (tree, bool); | |
fc304191 | 192 | |
ac206aff | 193 | #ifdef OBJCPLUS |
39b8ddc6 | 194 | static void really_start_method (tree, tree); |
ac206aff | 195 | #else |
196 | static void really_start_method (tree, struct c_arg_info *); | |
197 | #endif | |
0ced0389 | 198 | static int comp_proto_with_proto (tree, tree, int); |
ea446b0b | 199 | static tree objc_decay_parm_type (tree); |
fc304191 | 200 | |
a92771b8 | 201 | /* Utilities for debugging and error diagnostics. */ |
fc304191 | 202 | |
13dcc150 | 203 | static char *gen_type_name (tree); |
204 | static char *gen_type_name_0 (tree); | |
205 | static char *gen_method_decl (tree); | |
206 | static char *gen_declaration (tree); | |
c450c529 | 207 | |
a92771b8 | 208 | /* Everything else. */ |
c450c529 | 209 | |
267785bc | 210 | static void generate_struct_by_value_array (void) ATTRIBUTE_NORETURN; |
211 | ||
39b8ddc6 | 212 | static void mark_referenced_methods (void); |
f26877d5 | 213 | static bool objc_type_valid_for_messaging (tree type, bool allow_classes); |
f41791cf | 214 | static tree check_duplicates (tree, int, int); |
fc304191 | 215 | |
216 | /*** Private Interface (data) ***/ | |
0ced0389 | 217 | /* Flags for lookup_method_static(). */ |
736dea43 | 218 | |
219 | /* Look for class methods. */ | |
220 | #define OBJC_LOOKUP_CLASS 1 | |
221 | /* Do not examine superclasses. */ | |
222 | #define OBJC_LOOKUP_NO_SUPER 2 | |
223 | /* Disable returning an instance method of a root class when a class | |
224 | method can't be found. */ | |
6bbb4715 | 225 | #define OBJC_LOOKUP_NO_INSTANCE_METHODS_OF_ROOT_CLASS 4 |
0ced0389 | 226 | |
3e1e20c1 | 227 | /* The OCTI_... enumeration itself is in objc/objc-act.h. */ |
99ff4160 | 228 | tree objc_global_trees[OCTI_MAX]; |
fc304191 | 229 | |
99ff4160 | 230 | struct imp_entry *imp_list = 0; |
231 | int imp_count = 0; /* `@implementation' */ | |
232 | int cat_count = 0; /* `@category' */ | |
233 | ||
06511efd | 234 | objc_ivar_visibility_kind objc_ivar_visibility, objc_default_ivar_visibility; |
13dcc150 | 235 | |
c17b85ea | 236 | /* Use to generate method labels. */ |
237 | static int method_slot = 0; | |
fc304191 | 238 | |
069761fb | 239 | /* Flag to say whether methods in a protocol are optional or |
240 | required. */ | |
241 | static bool objc_method_optional_flag = false; | |
242 | ||
e93ea189 | 243 | static int objc_collecting_ivars = 0; |
244 | ||
e16610d0 | 245 | /* Flag that is set to 'true' while we are processing a class |
246 | extension. Since a class extension just "reopens" the main | |
247 | @interface, this can be used to determine if we are in the main | |
248 | @interface, or in a class extension. */ | |
249 | static bool objc_in_class_extension = false; | |
250 | ||
e0ece38e | 251 | static char *errbuf; /* Buffer for error diagnostics */ |
fc304191 | 252 | |
d7489d8d | 253 | /* An array of all the local variables in the current function that |
254 | need to be marked as volatile. */ | |
f1f41a6c | 255 | vec<tree, va_gc> *local_variables_to_volatilize = NULL; |
d7489d8d | 256 | |
13dcc150 | 257 | /* Store all constructed constant strings in a hash table so that |
258 | they get uniqued properly. */ | |
259 | ||
2ef51f0e | 260 | struct GTY((for_user)) string_descriptor { |
13dcc150 | 261 | /* The literal argument . */ |
262 | tree literal; | |
263 | ||
264 | /* The resulting constant string. */ | |
265 | tree constructor; | |
266 | }; | |
267 | ||
2ef51f0e | 268 | struct objc_string_hasher : ggc_hasher<string_descriptor *> |
269 | { | |
270 | static hashval_t hash (string_descriptor *); | |
271 | static bool equal (string_descriptor *, string_descriptor *); | |
272 | }; | |
273 | ||
274 | static GTY(()) hash_table<objc_string_hasher> *string_htab; | |
13dcc150 | 275 | |
fc304191 | 276 | FILE *gen_declaration_file; |
277 | ||
267785bc | 278 | /* Hooks for stuff that differs between runtimes. */ |
279 | objc_runtime_hooks runtime; | |
6ab3a6e6 | 280 | |
e4a7640a | 281 | /* Create a temporary variable of type 'type'. If 'name' is set, uses |
282 | the specified name, else use no name. Returns the declaration of | |
283 | the type. The 'name' is mostly useful for debugging. | |
284 | */ | |
267785bc | 285 | tree |
e4a7640a | 286 | objc_create_temporary_var (tree type, const char *name) |
287 | { | |
288 | tree decl; | |
289 | ||
290 | if (name != NULL) | |
291 | { | |
292 | decl = build_decl (input_location, | |
293 | VAR_DECL, get_identifier (name), type); | |
294 | } | |
295 | else | |
296 | { | |
297 | decl = build_decl (input_location, | |
298 | VAR_DECL, NULL_TREE, type); | |
299 | } | |
300 | TREE_USED (decl) = 1; | |
301 | DECL_ARTIFICIAL (decl) = 1; | |
302 | DECL_IGNORED_P (decl) = 1; | |
303 | DECL_CONTEXT (decl) = current_function_decl; | |
304 | ||
305 | return decl; | |
306 | } | |
307 | ||
3e1e20c1 | 308 | /* Some platforms pass small structures through registers versus |
309 | through an invisible pointer. Determine at what size structure is | |
310 | the transition point between the two possibilities. */ | |
ebcbb79c | 311 | |
647c0320 | 312 | static void |
39b8ddc6 | 313 | generate_struct_by_value_array (void) |
ebcbb79c | 314 | { |
315 | tree type; | |
6ab3a6e6 | 316 | tree decls; |
ebcbb79c | 317 | int i, j; |
318 | int aggregate_in_mem[32]; | |
319 | int found = 0; | |
320 | ||
3c2c63b4 | 321 | /* Presumably no platform passes 32 byte structures in a register. */ |
322 | /* ??? As an example, m64/ppc/Darwin can pass up to 8*long+13*double | |
323 | in registers. */ | |
ebcbb79c | 324 | for (i = 1; i < 32; i++) |
325 | { | |
326 | char buffer[5]; | |
6ab3a6e6 | 327 | tree *chain = NULL; |
ebcbb79c | 328 | |
329 | /* Create an unnamed struct that has `i' character components */ | |
0b09525f | 330 | type = objc_start_struct (NULL_TREE); |
ebcbb79c | 331 | |
332 | strcpy (buffer, "c1"); | |
6ab3a6e6 | 333 | decls = add_field_decl (char_type_node, buffer, &chain); |
ebcbb79c | 334 | |
335 | for (j = 1; j < i; j++) | |
336 | { | |
337 | sprintf (buffer, "c%d", j + 1); | |
6ab3a6e6 | 338 | add_field_decl (char_type_node, buffer, &chain); |
ebcbb79c | 339 | } |
6ab3a6e6 | 340 | objc_finish_struct (type, decls); |
39b8ddc6 | 341 | |
45550790 | 342 | aggregate_in_mem[i] = aggregate_value_p (type, 0); |
ebcbb79c | 343 | if (!aggregate_in_mem[i]) |
344 | found = 1; | |
345 | } | |
39b8ddc6 | 346 | |
ebcbb79c | 347 | /* We found some structures that are returned in registers instead of memory |
3e1e20c1 | 348 | so output the necessary data. */ |
ebcbb79c | 349 | if (found) |
350 | { | |
351 | for (i = 31; i >= 0; i--) | |
352 | if (!aggregate_in_mem[i]) | |
353 | break; | |
86d3c909 | 354 | printf ("#define OBJC_MAX_STRUCT_BY_VALUE %d\n", i); |
ebcbb79c | 355 | } |
39b8ddc6 | 356 | |
ebcbb79c | 357 | exit (0); |
358 | } | |
359 | ||
03bde601 | 360 | bool |
39b8ddc6 | 361 | objc_init (void) |
fc304191 | 362 | { |
267785bc | 363 | bool ok; |
13dcc150 | 364 | #ifdef OBJCPLUS |
365 | if (cxx_init () == false) | |
366 | #else | |
03bde601 | 367 | if (c_objc_common_init () == false) |
13dcc150 | 368 | #endif |
03bde601 | 369 | return false; |
9ceb1c29 | 370 | |
3c2c63b4 | 371 | /* print_struct_values is triggered by -print-runtime-info (used |
372 | when building libobjc, with an empty file as input). It does not | |
373 | require any ObjC setup, and it never returns. | |
374 | ||
375 | -fcompare-debug is used to check the compiler output; we are | |
376 | executed twice, once with flag_compare_debug set, and once with | |
377 | it not set. If the flag is used together with | |
378 | -print-runtime-info, we want to print the runtime info only once, | |
379 | else it would be output in duplicate. So we check | |
380 | flag_compare_debug to output it in only one of the invocations. | |
381 | ||
382 | As a side effect, this also that means -fcompare-debug | |
383 | -print-runtime-info will run the compiler twice, and compare the | |
384 | generated assembler file; the first time the compiler exits | |
385 | immediately (producing no file), and the second time it compiles | |
386 | an empty file. This checks, as a side effect, that compiling an | |
387 | empty file produces no assembler output. */ | |
267785bc | 388 | if (print_struct_values && !flag_compare_debug) |
267785bc | 389 | generate_struct_by_value_array (); |
fc304191 | 390 | |
267785bc | 391 | /* Set up stuff used by FE parser and all runtimes. */ |
392 | errbuf = XNEWVEC (char, 1024 * 10); | |
f41791cf | 393 | interface_hash_init (); |
267785bc | 394 | hash_init (); |
32ed3798 | 395 | objc_encoding_init (); |
267785bc | 396 | /* ... and then check flags and set-up for the selected runtime ... */ |
397 | if (flag_next_runtime && flag_objc_abi >= 2) | |
398 | ok = objc_next_runtime_abi_02_init (&runtime); | |
399 | else if (flag_next_runtime) | |
400 | ok = objc_next_runtime_abi_01_init (&runtime); | |
401 | else | |
402 | ok = objc_gnu_runtime_abi_01_init (&runtime); | |
ebcbb79c | 403 | |
267785bc | 404 | /* If that part of the setup failed - bail out immediately. */ |
405 | if (!ok) | |
406 | return false; | |
3c2f1b06 | 407 | |
06511efd | 408 | /* Determine the default visibility for instance variables. */ |
409 | switch (default_ivar_visibility) | |
410 | { | |
411 | case IVAR_VISIBILITY_PRIVATE: | |
412 | objc_default_ivar_visibility = OBJC_IVAR_VIS_PRIVATE; | |
413 | break; | |
414 | case IVAR_VISIBILITY_PUBLIC: | |
415 | objc_default_ivar_visibility = OBJC_IVAR_VIS_PUBLIC; | |
416 | break; | |
417 | case IVAR_VISIBILITY_PACKAGE: | |
418 | objc_default_ivar_visibility = OBJC_IVAR_VIS_PACKAGE; | |
419 | break; | |
420 | default: | |
421 | objc_default_ivar_visibility = OBJC_IVAR_VIS_PROTECTED; | |
422 | } | |
423 | ||
267785bc | 424 | /* Generate general types and push runtime-specific decls to file scope. */ |
425 | synth_module_prologue (); | |
33b3681f | 426 | |
03bde601 | 427 | return true; |
bf1846b6 | 428 | } |
429 | ||
3a1c9df2 | 430 | /* This is called at the end of parsing by the C/C++ parsers. */ |
fc304191 | 431 | void |
64cd9619 | 432 | objc_write_global_declarations (void) |
fc304191 | 433 | { |
376c21d1 | 434 | mark_referenced_methods (); |
bf1846b6 | 435 | |
267785bc | 436 | /* A missing @end might not be detected by the parser. */ |
437 | if (objc_implementation_context) | |
438 | { | |
439 | warning (0, "%<@end%> missing in implementation context"); | |
440 | finish_class (objc_implementation_context); | |
441 | objc_ivar_chain = NULL_TREE; | |
442 | objc_implementation_context = NULL_TREE; | |
443 | } | |
444 | ||
445 | if (warn_selector) | |
446 | { | |
f41791cf | 447 | objc_map_iterator_t i; |
267785bc | 448 | |
f41791cf | 449 | objc_map_iterator_initialize (class_method_map, &i); |
450 | while (objc_map_iterator_move_to_next (class_method_map, &i)) | |
451 | check_duplicates (objc_map_iterator_current_value (class_method_map, i), 0, 1); | |
267785bc | 452 | |
f41791cf | 453 | objc_map_iterator_initialize (instance_method_map, &i); |
454 | while (objc_map_iterator_move_to_next (instance_method_map, &i)) | |
455 | check_duplicates (objc_map_iterator_current_value (instance_method_map, i), 0, 0); | |
267785bc | 456 | } |
457 | ||
458 | /* TODO: consider an early exit here if either errorcount or sorrycount | |
459 | is non-zero. Not only is it wasting time to generate the metadata, | |
6bbb4715 | 460 | it needlessly imposes need to re-check for things that are already |
267785bc | 461 | determined to be errors. */ |
fc304191 | 462 | |
267785bc | 463 | /* Finalize Objective-C runtime data. No need to generate tables |
464 | and code if only checking syntax, or if generating a PCH file. */ | |
465 | if (!flag_syntax_only && !pch_file) | |
466 | { | |
f6593d66 | 467 | location_t saved_location; |
468 | ||
267785bc | 469 | /* If gen_declaration desired, open the output file. */ |
470 | if (flag_gen_declaration) | |
471 | { | |
472 | char * const dumpname = concat (dump_base_name, ".decl", NULL); | |
473 | gen_declaration_file = fopen (dumpname, "w"); | |
474 | if (gen_declaration_file == 0) | |
c05be867 | 475 | fatal_error (input_location, "can%'t open %s: %m", dumpname); |
267785bc | 476 | free (dumpname); |
477 | } | |
f6593d66 | 478 | |
479 | /* Set the input location to BUILTINS_LOCATION. This is good | |
480 | for error messages, in case any is generated while producing | |
481 | the metadata, but it also silences warnings that would be | |
482 | produced when compiling with -Wpadded in case when padding is | |
483 | automatically added to the built-in runtime data structure | |
484 | declarations. We know about this padding, and it is fine; we | |
485 | don't want users to see any warnings about it if they use | |
486 | -Wpadded. */ | |
487 | saved_location = input_location; | |
488 | input_location = BUILTINS_LOCATION; | |
489 | ||
267785bc | 490 | /* Compute and emit the meta-data tables for this runtime. */ |
491 | (*runtime.generate_metadata) (); | |
f6593d66 | 492 | |
493 | /* Restore the original location, just in case it mattered. */ | |
494 | input_location = saved_location; | |
495 | ||
267785bc | 496 | /* ... and then close any declaration file we opened. */ |
497 | if (gen_declaration_file) | |
498 | fclose (gen_declaration_file); | |
499 | } | |
fc304191 | 500 | } |
267785bc | 501 | |
e5876878 | 502 | /* Return the first occurrence of a method declaration corresponding |
503 | to sel_name in rproto_list. Search rproto_list recursively. | |
504 | If is_class is 0, search for instance methods, otherwise for class | |
505 | methods. */ | |
c450c529 | 506 | static tree |
39b8ddc6 | 507 | lookup_method_in_protocol_list (tree rproto_list, tree sel_name, |
e5876878 | 508 | int is_class) |
c450c529 | 509 | { |
53cd8676 | 510 | tree rproto, p, m; |
c450c529 | 511 | |
512 | for (rproto = rproto_list; rproto; rproto = TREE_CHAIN (rproto)) | |
513 | { | |
53cd8676 | 514 | p = TREE_VALUE (rproto); |
515 | m = NULL_TREE; | |
c450c529 | 516 | |
517 | if (TREE_CODE (p) == PROTOCOL_INTERFACE_TYPE) | |
518 | { | |
53cd8676 | 519 | /* First, search the @required protocol methods. */ |
520 | if (is_class) | |
521 | m = lookup_method (PROTOCOL_CLS_METHODS (p), sel_name); | |
522 | else | |
523 | m = lookup_method (PROTOCOL_NST_METHODS (p), sel_name); | |
524 | ||
525 | if (m) | |
526 | return m; | |
527 | ||
528 | /* If still not found, search the @optional protocol methods. */ | |
529 | if (is_class) | |
530 | m = lookup_method (PROTOCOL_OPTIONAL_CLS_METHODS (p), sel_name); | |
531 | else | |
532 | m = lookup_method (PROTOCOL_OPTIONAL_NST_METHODS (p), sel_name); | |
533 | ||
534 | if (m) | |
535 | return m; | |
536 | ||
537 | /* If still not found, search the attached protocols. */ | |
538 | if (PROTOCOL_LIST (p)) | |
539 | m = lookup_method_in_protocol_list (PROTOCOL_LIST (p), | |
540 | sel_name, is_class); | |
541 | if (m) | |
542 | return m; | |
c450c529 | 543 | } |
544 | else | |
7d27e4c9 | 545 | { |
546 | ; /* An identifier...if we could not find a protocol. */ | |
547 | } | |
c450c529 | 548 | } |
e0ece38e | 549 | |
c450c529 | 550 | return 0; |
551 | } | |
552 | ||
553 | static tree | |
39b8ddc6 | 554 | lookup_protocol_in_reflist (tree rproto_list, tree lproto) |
c450c529 | 555 | { |
3e1e20c1 | 556 | tree rproto, p; |
c450c529 | 557 | |
3e1e20c1 | 558 | /* Make sure the protocol is supported by the object on the rhs. */ |
559 | if (TREE_CODE (lproto) == PROTOCOL_INTERFACE_TYPE) | |
560 | { | |
561 | tree fnd = 0; | |
562 | for (rproto = rproto_list; rproto; rproto = TREE_CHAIN (rproto)) | |
563 | { | |
564 | p = TREE_VALUE (rproto); | |
c450c529 | 565 | |
3e1e20c1 | 566 | if (TREE_CODE (p) == PROTOCOL_INTERFACE_TYPE) |
567 | { | |
568 | if (lproto == p) | |
569 | fnd = lproto; | |
c450c529 | 570 | |
3e1e20c1 | 571 | else if (PROTOCOL_LIST (p)) |
572 | fnd = lookup_protocol_in_reflist (PROTOCOL_LIST (p), lproto); | |
573 | } | |
c450c529 | 574 | |
3e1e20c1 | 575 | if (fnd) |
576 | return fnd; | |
577 | } | |
578 | } | |
579 | else | |
580 | { | |
581 | ; /* An identifier...if we could not find a protocol. */ | |
582 | } | |
c450c529 | 583 | |
3e1e20c1 | 584 | return 0; |
fc304191 | 585 | } |
586 | ||
13dcc150 | 587 | void |
a336eb4b | 588 | objc_start_class_interface (tree klass, tree super_class, |
589 | tree protos, tree attributes) | |
13dcc150 | 590 | { |
c1cfb0f5 | 591 | if (flag_objc1_only && attributes) |
6bbb4715 | 592 | error_at (input_location, "class attributes are not available in Objective-C 1.0"); |
c1cfb0f5 | 593 | |
13dcc150 | 594 | objc_interface_context |
595 | = objc_ivar_context | |
c1cfb0f5 | 596 | = start_class (CLASS_INTERFACE_TYPE, klass, super_class, protos, attributes); |
06511efd | 597 | objc_ivar_visibility = objc_default_ivar_visibility; |
13dcc150 | 598 | } |
599 | ||
600 | void | |
a336eb4b | 601 | objc_start_category_interface (tree klass, tree categ, |
602 | tree protos, tree attributes) | |
13dcc150 | 603 | { |
a336eb4b | 604 | if (attributes) |
1ef143b6 | 605 | { |
606 | if (flag_objc1_only) | |
607 | error_at (input_location, "category attributes are not available in Objective-C 1.0"); | |
608 | else | |
6bbb4715 | 609 | warning_at (input_location, OPT_Wattributes, |
1ef143b6 | 610 | "category attributes are not available in this version" |
611 | " of the compiler, (ignored)"); | |
612 | } | |
e16610d0 | 613 | if (categ == NULL_TREE) |
614 | { | |
615 | if (flag_objc1_only) | |
616 | error_at (input_location, "class extensions are not available in Objective-C 1.0"); | |
598d5210 | 617 | else |
618 | { | |
619 | /* Iterate over all the classes and categories implemented | |
620 | up to now in this compilation unit. */ | |
621 | struct imp_entry *t; | |
622 | ||
623 | for (t = imp_list; t; t = t->next) | |
624 | { | |
625 | /* If we find a class @implementation with the same name | |
626 | as the one we are extending, produce an error. */ | |
627 | if (TREE_CODE (t->imp_context) == CLASS_IMPLEMENTATION_TYPE | |
628 | && IDENTIFIER_POINTER (CLASS_NAME (t->imp_context)) == IDENTIFIER_POINTER (klass)) | |
6bbb4715 | 629 | error_at (input_location, |
598d5210 | 630 | "class extension for class %qE declared after its %<@implementation%>", |
631 | klass); | |
632 | } | |
633 | } | |
e16610d0 | 634 | } |
13dcc150 | 635 | objc_interface_context |
c1cfb0f5 | 636 | = start_class (CATEGORY_INTERFACE_TYPE, klass, categ, protos, NULL_TREE); |
13dcc150 | 637 | objc_ivar_chain |
638 | = continue_class (objc_interface_context); | |
639 | } | |
640 | ||
641 | void | |
a336eb4b | 642 | objc_start_protocol (tree name, tree protos, tree attributes) |
13dcc150 | 643 | { |
c213e196 | 644 | if (flag_objc1_only && attributes) |
6bbb4715 | 645 | error_at (input_location, "protocol attributes are not available in Objective-C 1.0"); |
c213e196 | 646 | |
13dcc150 | 647 | objc_interface_context |
c213e196 | 648 | = start_protocol (PROTOCOL_INTERFACE_TYPE, name, protos, attributes); |
069761fb | 649 | objc_method_optional_flag = false; |
13dcc150 | 650 | } |
651 | ||
652 | void | |
653 | objc_continue_interface (void) | |
654 | { | |
655 | objc_ivar_chain | |
656 | = continue_class (objc_interface_context); | |
657 | } | |
658 | ||
659 | void | |
660 | objc_finish_interface (void) | |
661 | { | |
662 | finish_class (objc_interface_context); | |
663 | objc_interface_context = NULL_TREE; | |
069761fb | 664 | objc_method_optional_flag = false; |
e16610d0 | 665 | objc_in_class_extension = false; |
13dcc150 | 666 | } |
667 | ||
668 | void | |
ceb0f408 | 669 | objc_start_class_implementation (tree klass, tree super_class) |
13dcc150 | 670 | { |
671 | objc_implementation_context | |
672 | = objc_ivar_context | |
c1cfb0f5 | 673 | = start_class (CLASS_IMPLEMENTATION_TYPE, klass, super_class, NULL_TREE, |
674 | NULL_TREE); | |
06511efd | 675 | objc_ivar_visibility = objc_default_ivar_visibility; |
13dcc150 | 676 | } |
677 | ||
678 | void | |
ceb0f408 | 679 | objc_start_category_implementation (tree klass, tree categ) |
13dcc150 | 680 | { |
681 | objc_implementation_context | |
c1cfb0f5 | 682 | = start_class (CATEGORY_IMPLEMENTATION_TYPE, klass, categ, NULL_TREE, |
683 | NULL_TREE); | |
13dcc150 | 684 | objc_ivar_chain |
685 | = continue_class (objc_implementation_context); | |
686 | } | |
687 | ||
688 | void | |
689 | objc_continue_implementation (void) | |
690 | { | |
691 | objc_ivar_chain | |
692 | = continue_class (objc_implementation_context); | |
693 | } | |
694 | ||
695 | void | |
696 | objc_finish_implementation (void) | |
697 | { | |
0ced0389 | 698 | #ifdef OBJCPLUS |
699 | if (flag_objc_call_cxx_cdtors) | |
700 | objc_generate_cxx_cdtors (); | |
701 | #endif | |
702 | ||
13dcc150 | 703 | if (objc_implementation_context) |
704 | { | |
705 | finish_class (objc_implementation_context); | |
706 | objc_ivar_chain = NULL_TREE; | |
707 | objc_implementation_context = NULL_TREE; | |
708 | } | |
709 | else | |
c3ceba8e | 710 | warning (0, "%<@end%> must appear in an @implementation context"); |
13dcc150 | 711 | } |
712 | ||
713 | void | |
4a8875ed | 714 | objc_set_visibility (objc_ivar_visibility_kind visibility) |
13dcc150 | 715 | { |
4a8875ed | 716 | if (visibility == OBJC_IVAR_VIS_PACKAGE) |
1ef143b6 | 717 | { |
718 | if (flag_objc1_only) | |
719 | error ("%<@package%> is not available in Objective-C 1.0"); | |
720 | else | |
721 | warning (0, "%<@package%> presently has the same effect as %<@public%>"); | |
722 | } | |
4a8875ed | 723 | objc_ivar_visibility = visibility; |
13dcc150 | 724 | } |
725 | ||
069761fb | 726 | void |
727 | objc_set_method_opt (bool optional) | |
728 | { | |
1ef143b6 | 729 | if (flag_objc1_only) |
d2389fe7 | 730 | { |
731 | if (optional) | |
6bbb4715 | 732 | error_at (input_location, "%<@optional%> is not available in Objective-C 1.0"); |
d2389fe7 | 733 | else |
6bbb4715 | 734 | error_at (input_location, "%<@required%> is not available in Objective-C 1.0"); |
d2389fe7 | 735 | } |
1ef143b6 | 736 | |
069761fb | 737 | objc_method_optional_flag = optional; |
6bbb4715 | 738 | if (!objc_interface_context |
069761fb | 739 | || TREE_CODE (objc_interface_context) != PROTOCOL_INTERFACE_TYPE) |
740 | { | |
d2389fe7 | 741 | if (optional) |
742 | error ("%<@optional%> is allowed in @protocol context only"); | |
743 | else | |
744 | error ("%<@required%> is allowed in @protocol context only"); | |
069761fb | 745 | objc_method_optional_flag = false; |
746 | } | |
747 | } | |
748 | ||
7f5203a8 | 749 | /* This routine looks for a given PROPERTY in a list of CLASS, CATEGORY, or |
750 | PROTOCOL. */ | |
751 | static tree | |
752 | lookup_property_in_list (tree chain, tree property) | |
753 | { | |
754 | tree x; | |
755 | for (x = CLASS_PROPERTY_DECL (chain); x; x = TREE_CHAIN (x)) | |
756 | if (PROPERTY_NAME (x) == property) | |
757 | return x; | |
758 | return NULL_TREE; | |
759 | } | |
760 | ||
761 | /* This routine looks for a given PROPERTY in the tree chain of RPROTO_LIST. */ | |
762 | static tree lookup_property_in_protocol_list (tree rproto_list, tree property) | |
763 | { | |
764 | tree rproto, x; | |
765 | for (rproto = rproto_list; rproto; rproto = TREE_CHAIN (rproto)) | |
766 | { | |
767 | tree p = TREE_VALUE (rproto); | |
768 | if (TREE_CODE (p) == PROTOCOL_INTERFACE_TYPE) | |
769 | { | |
770 | if ((x = lookup_property_in_list (p, property))) | |
771 | return x; | |
772 | if (PROTOCOL_LIST (p)) | |
773 | return lookup_property_in_protocol_list (PROTOCOL_LIST (p), property); | |
774 | } | |
775 | else | |
776 | { | |
777 | ; /* An identifier...if we could not find a protocol. */ | |
778 | } | |
779 | } | |
780 | return NULL_TREE; | |
781 | } | |
782 | ||
783 | /* This routine looks up the PROPERTY in current INTERFACE, its categories and up the | |
784 | chain of interface hierarchy. */ | |
785 | static tree | |
786 | lookup_property (tree interface_type, tree property) | |
787 | { | |
788 | tree inter = interface_type; | |
789 | while (inter) | |
790 | { | |
791 | tree x, category; | |
792 | if ((x = lookup_property_in_list (inter, property))) | |
793 | return x; | |
794 | /* Failing that, look for the property in each category of the class. */ | |
795 | category = inter; | |
796 | while ((category = CLASS_CATEGORY_LIST (category))) | |
797 | { | |
798 | if ((x = lookup_property_in_list (category, property))) | |
799 | return x; | |
800 | ||
801 | /* When checking a category, also check the protocols | |
802 | attached with the category itself. */ | |
803 | if (CLASS_PROTOCOL_LIST (category) | |
804 | && (x = lookup_property_in_protocol_list | |
805 | (CLASS_PROTOCOL_LIST (category), property))) | |
806 | return x; | |
807 | } | |
808 | ||
809 | /* Failing to find in categories, look for property in protocol list. */ | |
6bbb4715 | 810 | if (CLASS_PROTOCOL_LIST (inter) |
7f5203a8 | 811 | && (x = lookup_property_in_protocol_list |
812 | (CLASS_PROTOCOL_LIST (inter), property))) | |
813 | return x; | |
6bbb4715 | 814 | |
7f5203a8 | 815 | /* Failing that, climb up the inheritance hierarchy. */ |
816 | inter = lookup_interface (CLASS_SUPER_NAME (inter)); | |
817 | } | |
818 | return inter; | |
819 | } | |
820 | ||
7590f0e5 | 821 | /* This routine is called by the parser when a |
822 | @property... declaration is found. 'decl' is the declaration of | |
823 | the property (type/identifier), and the other arguments represent | |
824 | property attributes that may have been specified in the Objective-C | |
825 | declaration. 'parsed_property_readonly' is 'true' if the attribute | |
826 | 'readonly' was specified, and 'false' if not; similarly for the | |
827 | other bool parameters. 'parsed_property_getter_ident' is NULL_TREE | |
828 | if the attribute 'getter' was not specified, and is the identifier | |
829 | corresponding to the specified getter if it was; similarly for | |
830 | 'parsed_property_setter_ident'. */ | |
86c110ac | 831 | void |
7590f0e5 | 832 | objc_add_property_declaration (location_t location, tree decl, |
833 | bool parsed_property_readonly, bool parsed_property_readwrite, | |
834 | bool parsed_property_assign, bool parsed_property_retain, | |
835 | bool parsed_property_copy, bool parsed_property_nonatomic, | |
9d9f5bb3 | 836 | tree parsed_property_getter_ident, tree parsed_property_setter_ident) |
86c110ac | 837 | { |
7590f0e5 | 838 | tree property_decl; |
839 | tree x; | |
9d9f5bb3 | 840 | /* 'property_readonly' and 'property_assign_semantics' are the final |
841 | attributes of the property after all parsed attributes have been | |
842 | considered (eg, if we parsed no 'readonly' and no 'readwrite', ie | |
843 | parsed_property_readonly = false and parsed_property_readwrite = | |
844 | false, then property_readonly will be false because the default | |
845 | is readwrite). */ | |
7590f0e5 | 846 | bool property_readonly = false; |
9d9f5bb3 | 847 | objc_property_assign_semantics property_assign_semantics = OBJC_PROPERTY_ASSIGN; |
e16610d0 | 848 | bool property_extension_in_class_extension = false; |
7590f0e5 | 849 | |
1ef143b6 | 850 | if (flag_objc1_only) |
851 | error_at (input_location, "%<@property%> is not available in Objective-C 1.0"); | |
852 | ||
7590f0e5 | 853 | if (parsed_property_readonly && parsed_property_readwrite) |
86c110ac | 854 | { |
7590f0e5 | 855 | error_at (location, "%<readonly%> attribute conflicts with %<readwrite%> attribute"); |
856 | /* In case of conflicting attributes (here and below), after | |
857 | producing an error, we pick one of the attributes and keep | |
858 | going. */ | |
859 | property_readonly = false; | |
860 | } | |
861 | else | |
862 | { | |
863 | if (parsed_property_readonly) | |
86c110ac | 864 | property_readonly = true; |
6bbb4715 | 865 | |
7590f0e5 | 866 | if (parsed_property_readwrite) |
867 | property_readonly = false; | |
86c110ac | 868 | } |
86c110ac | 869 | |
7590f0e5 | 870 | if (parsed_property_readonly && parsed_property_setter_ident) |
871 | { | |
25bf0383 | 872 | error_at (location, "%<readonly%> attribute conflicts with %<setter%> attribute"); |
9d9f5bb3 | 873 | property_readonly = false; |
7590f0e5 | 874 | } |
86c110ac | 875 | |
7590f0e5 | 876 | if (parsed_property_assign && parsed_property_retain) |
877 | { | |
878 | error_at (location, "%<assign%> attribute conflicts with %<retain%> attribute"); | |
879 | property_assign_semantics = OBJC_PROPERTY_RETAIN; | |
880 | } | |
881 | else if (parsed_property_assign && parsed_property_copy) | |
882 | { | |
883 | error_at (location, "%<assign%> attribute conflicts with %<copy%> attribute"); | |
884 | property_assign_semantics = OBJC_PROPERTY_COPY; | |
885 | } | |
886 | else if (parsed_property_retain && parsed_property_copy) | |
887 | { | |
888 | error_at (location, "%<retain%> attribute conflicts with %<copy%> attribute"); | |
889 | property_assign_semantics = OBJC_PROPERTY_COPY; | |
890 | } | |
891 | else | |
892 | { | |
893 | if (parsed_property_assign) | |
894 | property_assign_semantics = OBJC_PROPERTY_ASSIGN; | |
86c110ac | 895 | |
7590f0e5 | 896 | if (parsed_property_retain) |
897 | property_assign_semantics = OBJC_PROPERTY_RETAIN; | |
898 | ||
899 | if (parsed_property_copy) | |
900 | property_assign_semantics = OBJC_PROPERTY_COPY; | |
901 | } | |
902 | ||
9d9f5bb3 | 903 | if (!objc_interface_context) |
86c110ac | 904 | { |
9d9f5bb3 | 905 | error_at (location, "property declaration not in @interface or @protocol context"); |
86c110ac | 906 | return; |
907 | } | |
908 | ||
9d9f5bb3 | 909 | /* At this point we know that we are either in an interface, a |
910 | category, or a protocol. */ | |
911 | ||
25bf0383 | 912 | /* We expect a FIELD_DECL from the parser. Make sure we didn't get |
913 | something else, as that would confuse the checks below. */ | |
914 | if (TREE_CODE (decl) != FIELD_DECL) | |
915 | { | |
916 | error_at (location, "invalid property declaration"); | |
6bbb4715 | 917 | return; |
25bf0383 | 918 | } |
919 | ||
920 | /* Do some spot-checks for the most obvious invalid types. */ | |
921 | ||
922 | if (TREE_CODE (TREE_TYPE (decl)) == ARRAY_TYPE) | |
9d9f5bb3 | 923 | { |
25bf0383 | 924 | error_at (location, "property can not be an array"); |
9d9f5bb3 | 925 | return; |
926 | } | |
86c110ac | 927 | |
25bf0383 | 928 | /* The C++/ObjC++ parser seems to reject the ':' for a bitfield when |
929 | parsing, while the C/ObjC parser accepts it and gives us a | |
930 | FIELD_DECL with a DECL_INITIAL set. So we use the DECL_INITIAL | |
931 | to check for a bitfield when doing ObjC. */ | |
932 | #ifndef OBJCPLUS | |
933 | if (DECL_INITIAL (decl)) | |
934 | { | |
935 | /* A @property is not an actual variable, but it is a way to | |
936 | describe a pair of accessor methods, so its type (which is | |
937 | the type of the return value of the getter and the first | |
938 | argument of the setter) can't be a bitfield (as return values | |
939 | and arguments of functions can not be bitfields). The | |
940 | underlying instance variable could be a bitfield, but that is | |
941 | a different matter. */ | |
942 | error_at (location, "property can not be a bit-field"); | |
6bbb4715 | 943 | return; |
25bf0383 | 944 | } |
945 | #endif | |
946 | ||
947 | /* TODO: Check that the property type is an Objective-C object or a | |
948 | "POD". */ | |
9d9f5bb3 | 949 | |
f26877d5 | 950 | /* Implement -Wproperty-assign-default (which is enabled by default). */ |
951 | if (warn_property_assign_default | |
9d9f5bb3 | 952 | /* If garbage collection is not being used, then 'assign' is |
953 | valid for objects (and typically used for delegates) but it | |
954 | is wrong in most cases (since most objects need to be | |
955 | retained or copied in setters). Warn users when 'assign' is | |
956 | used implicitly. */ | |
f26877d5 | 957 | && property_assign_semantics == OBJC_PROPERTY_ASSIGN |
958 | /* Read-only properties are never assigned, so the assignment | |
959 | semantics do not matter in that case. */ | |
960 | && !property_readonly | |
961 | && !flag_objc_gc) | |
962 | { | |
9d9f5bb3 | 963 | /* Please note that it would make sense to default to 'assign' |
964 | for non-{Objective-C objects}, and to 'retain' for | |
965 | Objective-C objects. But that would break compatibility with | |
966 | other compilers. */ | |
f26877d5 | 967 | if (!parsed_property_assign && !parsed_property_retain && !parsed_property_copy) |
86c110ac | 968 | { |
f26877d5 | 969 | /* Use 'false' so we do not warn for Class objects. */ |
970 | if (objc_type_valid_for_messaging (TREE_TYPE (decl), false)) | |
86c110ac | 971 | { |
6bbb4715 | 972 | warning_at (location, |
f26877d5 | 973 | 0, |
6bbb4715 | 974 | "object property %qD has no %<assign%>, %<retain%> or %<copy%> attribute; assuming %<assign%>", |
f26877d5 | 975 | decl); |
6bbb4715 | 976 | inform (location, |
f26877d5 | 977 | "%<assign%> can be unsafe for Objective-C objects; please state explicitly if you need it"); |
86c110ac | 978 | } |
979 | } | |
86c110ac | 980 | } |
6bbb4715 | 981 | |
9d9f5bb3 | 982 | if (property_assign_semantics == OBJC_PROPERTY_RETAIN |
f26877d5 | 983 | && !objc_type_valid_for_messaging (TREE_TYPE (decl), true)) |
9d9f5bb3 | 984 | error_at (location, "%<retain%> attribute is only valid for Objective-C objects"); |
6bbb4715 | 985 | |
9d9f5bb3 | 986 | if (property_assign_semantics == OBJC_PROPERTY_COPY |
f26877d5 | 987 | && !objc_type_valid_for_messaging (TREE_TYPE (decl), true)) |
9d9f5bb3 | 988 | error_at (location, "%<copy%> attribute is only valid for Objective-C objects"); |
7590f0e5 | 989 | |
7f5203a8 | 990 | /* Now determine the final property getter and setter names. They |
991 | will be stored in the PROPERTY_DECL, from which they'll always be | |
992 | extracted and used. */ | |
993 | ||
994 | /* Adjust, or fill in, setter and getter names. We overwrite the | |
995 | parsed_property_setter_ident and parsed_property_getter_ident | |
996 | with the final setter and getter identifiers that will be | |
997 | used. */ | |
998 | if (parsed_property_setter_ident) | |
999 | { | |
1000 | /* The setter should be terminated by ':', but the parser only | |
1001 | gives us an identifier without ':'. So, we need to add ':' | |
1002 | at the end. */ | |
1003 | const char *parsed_setter = IDENTIFIER_POINTER (parsed_property_setter_ident); | |
1004 | size_t length = strlen (parsed_setter); | |
1005 | char *final_setter = (char *)alloca (length + 2); | |
1006 | ||
1007 | sprintf (final_setter, "%s:", parsed_setter); | |
1008 | parsed_property_setter_ident = get_identifier (final_setter); | |
1009 | } | |
1010 | else | |
1011 | { | |
1012 | if (!property_readonly) | |
6bbb4715 | 1013 | parsed_property_setter_ident = get_identifier (objc_build_property_setter_name |
7f5203a8 | 1014 | (DECL_NAME (decl))); |
1015 | } | |
1016 | ||
1017 | if (!parsed_property_getter_ident) | |
1018 | parsed_property_getter_ident = DECL_NAME (decl); | |
1019 | ||
9d9f5bb3 | 1020 | /* Check for duplicate property declarations. We first check the |
7f5203a8 | 1021 | immediate context for a property with the same name. Any such |
e16610d0 | 1022 | declarations are an error, unless this is a class extension and |
1023 | we are extending a property from readonly to readwrite. */ | |
9d9f5bb3 | 1024 | for (x = CLASS_PROPERTY_DECL (objc_interface_context); x; x = TREE_CHAIN (x)) |
1025 | { | |
1026 | if (PROPERTY_NAME (x) == DECL_NAME (decl)) | |
86c110ac | 1027 | { |
e16610d0 | 1028 | if (objc_in_class_extension |
1029 | && property_readonly == 0 | |
1030 | && PROPERTY_READONLY (x) == 1) | |
1031 | { | |
1032 | /* This is a class extension, and we are extending an | |
1033 | existing readonly property to a readwrite one. | |
1034 | That's fine. :-) */ | |
1035 | property_extension_in_class_extension = true; | |
1036 | break; | |
1037 | } | |
1038 | else | |
1039 | { | |
1040 | location_t original_location = DECL_SOURCE_LOCATION (x); | |
6bbb4715 | 1041 | |
e16610d0 | 1042 | error_at (location, "redeclaration of property %qD", decl); |
6bbb4715 | 1043 | |
e16610d0 | 1044 | if (original_location != UNKNOWN_LOCATION) |
1045 | inform (original_location, "originally specified here"); | |
1046 | return; | |
1047 | } | |
1048 | } | |
86c110ac | 1049 | } |
9d9f5bb3 | 1050 | |
e16610d0 | 1051 | /* If x is not NULL_TREE, we must be in a class extension and we're |
1052 | extending a readonly property. In that case, no point in | |
1053 | searching for another declaration. */ | |
1054 | if (x == NULL_TREE) | |
1055 | { | |
1056 | /* We now need to check for existing property declarations (in | |
1057 | the superclass, other categories or protocols) and check that | |
1058 | the new declaration is not in conflict with existing | |
1059 | ones. */ | |
7f5203a8 | 1060 | |
e16610d0 | 1061 | /* Search for a previous, existing declaration of a property |
1062 | with the same name in superclasses, protocols etc. If one is | |
1063 | found, it will be in the 'x' variable. */ | |
7f5203a8 | 1064 | |
e16610d0 | 1065 | /* Note that, for simplicity, the following may search again the |
1066 | local context. That's Ok as nothing will be found (else we'd | |
1067 | have thrown an error above); it's only a little inefficient, | |
1068 | but the code is simpler. */ | |
1069 | switch (TREE_CODE (objc_interface_context)) | |
7f5203a8 | 1070 | { |
e16610d0 | 1071 | case CLASS_INTERFACE_TYPE: |
1072 | /* Look up the property in the current @interface (which | |
1073 | will find nothing), then its protocols and categories and | |
1074 | superclasses. */ | |
1075 | x = lookup_property (objc_interface_context, DECL_NAME (decl)); | |
1076 | break; | |
1077 | case CATEGORY_INTERFACE_TYPE: | |
1078 | /* Look up the property in the main @interface, then | |
1079 | protocols and categories (one of them is ours, and will | |
1080 | find nothing) and superclasses. */ | |
1081 | x = lookup_property (lookup_interface (CLASS_NAME (objc_interface_context)), | |
1082 | DECL_NAME (decl)); | |
1083 | break; | |
1084 | case PROTOCOL_INTERFACE_TYPE: | |
1085 | /* Looks up the property in any protocols attached to the | |
1086 | current protocol. */ | |
1087 | if (PROTOCOL_LIST (objc_interface_context)) | |
1088 | { | |
1089 | x = lookup_property_in_protocol_list (PROTOCOL_LIST (objc_interface_context), | |
1090 | DECL_NAME (decl)); | |
1091 | } | |
1092 | break; | |
1093 | default: | |
1094 | gcc_unreachable (); | |
7f5203a8 | 1095 | } |
7f5203a8 | 1096 | } |
1097 | ||
1098 | if (x != NULL_TREE) | |
1099 | { | |
1100 | /* An existing property was found; check that it has the same | |
1101 | types, or it is compatible. */ | |
1102 | location_t original_location = DECL_SOURCE_LOCATION (x); | |
db496216 | 1103 | |
7f5203a8 | 1104 | if (PROPERTY_NONATOMIC (x) != parsed_property_nonatomic) |
1105 | { | |
25bf0383 | 1106 | warning_at (location, 0, |
1107 | "'nonatomic' attribute of property %qD conflicts with previous declaration", decl); | |
6bbb4715 | 1108 | |
7f5203a8 | 1109 | if (original_location != UNKNOWN_LOCATION) |
1110 | inform (original_location, "originally specified here"); | |
1111 | return; | |
1112 | } | |
1113 | ||
1114 | if (PROPERTY_GETTER_NAME (x) != parsed_property_getter_ident) | |
1115 | { | |
25bf0383 | 1116 | warning_at (location, 0, |
1117 | "'getter' attribute of property %qD conflicts with previous declaration", decl); | |
6bbb4715 | 1118 | |
7f5203a8 | 1119 | if (original_location != UNKNOWN_LOCATION) |
1120 | inform (original_location, "originally specified here"); | |
1121 | return; | |
1122 | } | |
1123 | ||
1124 | /* We can only compare the setter names if both the old and new property have a setter. */ | |
1125 | if (!property_readonly && !PROPERTY_READONLY(x)) | |
1126 | { | |
1127 | if (PROPERTY_SETTER_NAME (x) != parsed_property_setter_ident) | |
1128 | { | |
25bf0383 | 1129 | warning_at (location, 0, |
1130 | "'setter' attribute of property %qD conflicts with previous declaration", decl); | |
6bbb4715 | 1131 | |
7f5203a8 | 1132 | if (original_location != UNKNOWN_LOCATION) |
1133 | inform (original_location, "originally specified here"); | |
1134 | return; | |
1135 | } | |
1136 | } | |
1137 | ||
1138 | if (PROPERTY_ASSIGN_SEMANTICS (x) != property_assign_semantics) | |
1139 | { | |
25bf0383 | 1140 | warning_at (location, 0, |
1141 | "assign semantics attributes of property %qD conflict with previous declaration", decl); | |
6bbb4715 | 1142 | |
7f5203a8 | 1143 | if (original_location != UNKNOWN_LOCATION) |
1144 | inform (original_location, "originally specified here"); | |
1145 | return; | |
1146 | } | |
1147 | ||
1148 | /* It's ok to have a readonly property that becomes a readwrite, but not vice versa. */ | |
1149 | if (PROPERTY_READONLY (x) == 0 && property_readonly == 1) | |
1150 | { | |
25bf0383 | 1151 | warning_at (location, 0, |
1152 | "'readonly' attribute of property %qD conflicts with previous declaration", decl); | |
6bbb4715 | 1153 | |
7f5203a8 | 1154 | if (original_location != UNKNOWN_LOCATION) |
1155 | inform (original_location, "originally specified here"); | |
1156 | return; | |
1157 | } | |
1158 | ||
ad312852 | 1159 | /* We now check that the new and old property declarations have |
1160 | the same types (or compatible one). In the Objective-C | |
1161 | tradition of loose type checking, we do type-checking but | |
1162 | only generate warnings (not errors) if they do not match. | |
1163 | For non-readonly properties, the types must match exactly; | |
1164 | for readonly properties, it is allowed to use a "more | |
1165 | specialized" type in the new property declaration. Eg, the | |
1166 | superclass has a getter returning (NSArray *) and the | |
1167 | subclass a getter returning (NSMutableArray *). The object's | |
1168 | getter returns an (NSMutableArray *); but if you cast the | |
1169 | object to the superclass, which is allowed, you'd still | |
1170 | expect the getter to return an (NSArray *), which works since | |
1171 | an (NSMutableArray *) is an (NSArray *) too. So, the set of | |
1172 | objects belonging to the type of the new @property should be | |
1173 | a subset of the set of objects belonging to the type of the | |
1174 | old @property. This is what "specialization" means. And the | |
1175 | reason it only applies to readonly properties is that for a | |
1176 | readwrite property the setter would have the opposite | |
1177 | requirement - ie that the superclass type is more specialized | |
1178 | then the subclass one; hence the only way to satisfy both | |
1179 | constraints is that the types match. */ | |
1180 | ||
1181 | /* If the types are not the same in the C sense, we warn ... */ | |
1182 | if (!comptypes (TREE_TYPE (x), TREE_TYPE (decl)) | |
1183 | /* ... unless the property is readonly, in which case we | |
1184 | allow a new, more specialized, declaration. */ | |
6bbb4715 | 1185 | && (!property_readonly |
ad312852 | 1186 | || !objc_compare_types (TREE_TYPE (x), |
1187 | TREE_TYPE (decl), -5, NULL_TREE))) | |
7f5203a8 | 1188 | { |
ad312852 | 1189 | warning_at (location, 0, |
1190 | "type of property %qD conflicts with previous declaration", decl); | |
1191 | if (original_location != UNKNOWN_LOCATION) | |
1192 | inform (original_location, "originally specified here"); | |
1193 | return; | |
7f5203a8 | 1194 | } |
e16610d0 | 1195 | |
1196 | /* If we are in a class extension and we're extending a readonly | |
1197 | property in the main @interface, we'll just update the | |
1198 | existing property with the readwrite flag and potentially the | |
1199 | new setter name. */ | |
1200 | if (property_extension_in_class_extension) | |
1201 | { | |
1202 | PROPERTY_READONLY (x) = 0; | |
1203 | PROPERTY_SETTER_NAME (x) = parsed_property_setter_ident; | |
1204 | return; | |
1205 | } | |
7f5203a8 | 1206 | } |
9d9f5bb3 | 1207 | |
1208 | /* Create a PROPERTY_DECL node. */ | |
1209 | property_decl = make_node (PROPERTY_DECL); | |
1210 | ||
1211 | /* Copy the basic information from the original decl. */ | |
1212 | TREE_TYPE (property_decl) = TREE_TYPE (decl); | |
1213 | DECL_SOURCE_LOCATION (property_decl) = DECL_SOURCE_LOCATION (decl); | |
1214 | TREE_DEPRECATED (property_decl) = TREE_DEPRECATED (decl); | |
6bbb4715 | 1215 | |
9d9f5bb3 | 1216 | /* Add property-specific information. */ |
1217 | PROPERTY_NAME (property_decl) = DECL_NAME (decl); | |
1218 | PROPERTY_GETTER_NAME (property_decl) = parsed_property_getter_ident; | |
1219 | PROPERTY_SETTER_NAME (property_decl) = parsed_property_setter_ident; | |
1220 | PROPERTY_READONLY (property_decl) = property_readonly; | |
1221 | PROPERTY_NONATOMIC (property_decl) = parsed_property_nonatomic; | |
1222 | PROPERTY_ASSIGN_SEMANTICS (property_decl) = property_assign_semantics; | |
1223 | PROPERTY_IVAR_NAME (property_decl) = NULL_TREE; | |
1224 | PROPERTY_DYNAMIC (property_decl) = 0; | |
1225 | ||
db496216 | 1226 | /* Remember the fact that the property was found in the @optional |
1227 | section in a @protocol, or not. */ | |
1228 | if (objc_method_optional_flag) | |
1229 | PROPERTY_OPTIONAL (property_decl) = 1; | |
1230 | else | |
1231 | PROPERTY_OPTIONAL (property_decl) = 0; | |
1232 | ||
7f5203a8 | 1233 | /* Note that PROPERTY_GETTER_NAME is always set for all |
1234 | PROPERTY_DECLs, and PROPERTY_SETTER_NAME is always set for all | |
1235 | PROPERTY_DECLs where PROPERTY_READONLY == 0. Any time we deal | |
1236 | with a getter or setter, we should get the PROPERTY_DECL and use | |
1237 | PROPERTY_GETTER_NAME and PROPERTY_SETTER_NAME to know the correct | |
1238 | names. */ | |
1239 | ||
9d9f5bb3 | 1240 | /* Add the PROPERTY_DECL to the list of properties for the class. */ |
1241 | TREE_CHAIN (property_decl) = CLASS_PROPERTY_DECL (objc_interface_context); | |
1242 | CLASS_PROPERTY_DECL (objc_interface_context) = property_decl; | |
86c110ac | 1243 | } |
1244 | ||
890881e7 | 1245 | /* This is a subroutine of objc_maybe_build_component_ref. Search the |
736dea43 | 1246 | list of methods in the interface (and, failing that, the local list |
1247 | in the implementation, and failing that, the protocol list) | |
890881e7 | 1248 | provided for a 'setter' or 'getter' for 'component' with default |
1249 | names (ie, if 'component' is "name", then search for "name" and | |
db496216 | 1250 | "setName:"). It is also possible to specify a different |
1251 | 'getter_name' (this is used for @optional readonly properties). If | |
1252 | any is found, then create an artificial property that uses them. | |
1253 | Return NULL_TREE if 'getter' or 'setter' could not be found. */ | |
890881e7 | 1254 | static tree |
6bbb4715 | 1255 | maybe_make_artificial_property_decl (tree interface, tree implementation, |
db496216 | 1256 | tree protocol_list, tree component, bool is_class, |
1257 | tree getter_name) | |
890881e7 | 1258 | { |
890881e7 | 1259 | tree setter_name = get_identifier (objc_build_property_setter_name (component)); |
1260 | tree getter = NULL_TREE; | |
1261 | tree setter = NULL_TREE; | |
1262 | ||
db496216 | 1263 | if (getter_name == NULL_TREE) |
1264 | getter_name = component; | |
1265 | ||
736dea43 | 1266 | /* First, check the @interface and all superclasses. */ |
890881e7 | 1267 | if (interface) |
1268 | { | |
1269 | int flags = 0; | |
1270 | ||
736dea43 | 1271 | /* Using instance methods of the root class as accessors is most |
1272 | likely unwanted and can be extremely confusing (and, most | |
1273 | importantly, other Objective-C 2.0 compilers do not do it). | |
1274 | Turn it off. */ | |
890881e7 | 1275 | if (is_class) |
736dea43 | 1276 | flags = OBJC_LOOKUP_CLASS | OBJC_LOOKUP_NO_INSTANCE_METHODS_OF_ROOT_CLASS; |
6bbb4715 | 1277 | |
890881e7 | 1278 | getter = lookup_method_static (interface, getter_name, flags); |
1279 | setter = lookup_method_static (interface, setter_name, flags); | |
1280 | } | |
1281 | ||
736dea43 | 1282 | /* Second, check the local @implementation context. */ |
1283 | if (!getter && !setter) | |
1284 | { | |
1285 | if (implementation) | |
1286 | { | |
1287 | if (is_class) | |
1288 | { | |
1289 | getter = lookup_method (CLASS_CLS_METHODS (implementation), getter_name); | |
1290 | setter = lookup_method (CLASS_CLS_METHODS (implementation), setter_name); | |
1291 | } | |
1292 | else | |
1293 | { | |
1294 | getter = lookup_method (CLASS_NST_METHODS (implementation), getter_name); | |
6bbb4715 | 1295 | setter = lookup_method (CLASS_NST_METHODS (implementation), setter_name); |
736dea43 | 1296 | } |
1297 | } | |
1298 | } | |
1299 | ||
1300 | /* Try the protocol_list if we didn't find anything in the | |
1301 | @interface and in the @implementation. */ | |
890881e7 | 1302 | if (!getter && !setter) |
1303 | { | |
1304 | getter = lookup_method_in_protocol_list (protocol_list, getter_name, is_class); | |
1305 | setter = lookup_method_in_protocol_list (protocol_list, setter_name, is_class); | |
1306 | } | |
1307 | ||
1308 | /* There needs to be at least a getter or setter for this to be a | |
1309 | valid 'object.component' syntax. */ | |
1310 | if (getter || setter) | |
1311 | { | |
1312 | /* Yes ... determine the type of the expression. */ | |
1313 | tree property_decl; | |
1314 | tree type; | |
6bbb4715 | 1315 | |
890881e7 | 1316 | if (getter) |
1317 | type = TREE_VALUE (TREE_TYPE (getter)); | |
1318 | else | |
1319 | type = TREE_VALUE (TREE_TYPE (METHOD_SEL_ARGS (setter))); | |
6bbb4715 | 1320 | |
890881e7 | 1321 | /* Create an artificial property declaration with the |
1322 | information we collected on the type and getter/setter | |
1323 | names. */ | |
1324 | property_decl = make_node (PROPERTY_DECL); | |
6bbb4715 | 1325 | |
890881e7 | 1326 | TREE_TYPE (property_decl) = type; |
1327 | DECL_SOURCE_LOCATION (property_decl) = input_location; | |
1328 | TREE_DEPRECATED (property_decl) = 0; | |
1329 | DECL_ARTIFICIAL (property_decl) = 1; | |
d67e8485 | 1330 | |
890881e7 | 1331 | /* Add property-specific information. Note that one of |
1332 | PROPERTY_GETTER_NAME or PROPERTY_SETTER_NAME may refer to a | |
1333 | non-existing method; this will generate an error when the | |
1334 | expression is later compiled. At this stage we don't know if | |
1335 | the getter or setter will be used, so we can't generate an | |
1336 | error. */ | |
1337 | PROPERTY_NAME (property_decl) = component; | |
1338 | PROPERTY_GETTER_NAME (property_decl) = getter_name; | |
1339 | PROPERTY_SETTER_NAME (property_decl) = setter_name; | |
1340 | PROPERTY_READONLY (property_decl) = 0; | |
1341 | PROPERTY_NONATOMIC (property_decl) = 0; | |
1342 | PROPERTY_ASSIGN_SEMANTICS (property_decl) = 0; | |
1343 | PROPERTY_IVAR_NAME (property_decl) = NULL_TREE; | |
1344 | PROPERTY_DYNAMIC (property_decl) = 0; | |
db496216 | 1345 | PROPERTY_OPTIONAL (property_decl) = 0; |
890881e7 | 1346 | |
1347 | if (!getter) | |
1348 | PROPERTY_HAS_NO_GETTER (property_decl) = 1; | |
1349 | ||
1350 | /* The following is currently unused, but it's nice to have | |
1351 | there. We may use it if we need in the future. */ | |
1352 | if (!setter) | |
1353 | PROPERTY_HAS_NO_SETTER (property_decl) = 1; | |
1354 | ||
1355 | return property_decl; | |
1356 | } | |
1357 | ||
1358 | return NULL_TREE; | |
1359 | } | |
86c110ac | 1360 | |
9d9f5bb3 | 1361 | /* This hook routine is invoked by the parser when an expression such |
1362 | as 'xxx.yyy' is parsed. We get a chance to process these | |
1363 | expressions in a way that is specified to Objective-C (to implement | |
890881e7 | 1364 | the Objective-C 2.0 dot-syntax, properties, or non-fragile ivars). |
1365 | If the expression is not an Objective-C specified expression, we | |
1366 | should return NULL_TREE; else we return the expression. | |
1367 | ||
1368 | At the moment this only implements dot-syntax and properties (not | |
1369 | non-fragile ivars yet), ie 'object.property' or 'object.component' | |
1370 | where 'component' is not a declared property, but a valid getter or | |
1371 | setter for it could be found. */ | |
86c110ac | 1372 | tree |
9d9f5bb3 | 1373 | objc_maybe_build_component_ref (tree object, tree property_ident) |
86c110ac | 1374 | { |
1375 | tree x = NULL_TREE; | |
1376 | tree rtype; | |
1377 | ||
736dea43 | 1378 | /* If we are in Objective-C 1.0 mode, dot-syntax and properties are |
1379 | not available. */ | |
1ef143b6 | 1380 | if (flag_objc1_only) |
1381 | return NULL_TREE; | |
1382 | ||
736dea43 | 1383 | /* Try to determine if 'object' is an Objective-C object or not. If |
1384 | not, return. */ | |
6bbb4715 | 1385 | if (object == NULL_TREE || object == error_mark_node |
9d9f5bb3 | 1386 | || (rtype = TREE_TYPE (object)) == NULL_TREE) |
86c110ac | 1387 | return NULL_TREE; |
6bbb4715 | 1388 | |
9d9f5bb3 | 1389 | if (property_ident == NULL_TREE || property_ident == error_mark_node |
1390 | || TREE_CODE (property_ident) != IDENTIFIER_NODE) | |
86c110ac | 1391 | return NULL_TREE; |
1392 | ||
736dea43 | 1393 | /* The following analysis of 'object' is similar to the one used for |
1394 | the 'receiver' of a method invocation. We need to determine what | |
1395 | 'object' is and find the appropriate property (either declared, | |
1396 | or artificial) for it (in the same way as we need to find the | |
1397 | appropriate method prototype for a method invocation). There are | |
1398 | some simplifications here though: "object.property" is invalid if | |
1399 | "object" has a type of "id" or "Class"; it must at least have a | |
1400 | protocol attached to it, and "object" is never a class name as | |
1401 | that is done by objc_build_class_component_ref. Finally, we | |
1402 | don't know if this really is a dot-syntax expression, so we want | |
1403 | to make a quick exit if it is not; for this reason, we try to | |
1404 | postpone checks after determining that 'object' looks like an | |
1405 | Objective-C object. */ | |
1406 | ||
86c110ac | 1407 | if (objc_is_id (rtype)) |
1408 | { | |
736dea43 | 1409 | /* This is the case that the 'object' is of type 'id' or |
1410 | 'Class'. */ | |
890881e7 | 1411 | |
736dea43 | 1412 | /* Check if at least it is of type 'id <Protocol>' or 'Class |
1413 | <Protocol>'; if so, look the property up in the | |
1414 | protocols. */ | |
1415 | if (TYPE_HAS_OBJC_INFO (TREE_TYPE (rtype))) | |
890881e7 | 1416 | { |
736dea43 | 1417 | tree rprotos = TYPE_OBJC_PROTOCOL_LIST (TREE_TYPE (rtype)); |
6bbb4715 | 1418 | |
736dea43 | 1419 | if (rprotos) |
1420 | { | |
1421 | /* No point looking up declared @properties if we are | |
1422 | dealing with a class. Classes have no declared | |
1423 | properties. */ | |
1424 | if (!IS_CLASS (rtype)) | |
1425 | x = lookup_property_in_protocol_list (rprotos, property_ident); | |
db496216 | 1426 | |
736dea43 | 1427 | if (x == NULL_TREE) |
1428 | { | |
1429 | /* Ok, no property. Maybe it was an | |
1430 | object.component dot-syntax without a declared | |
1431 | property (this is valid for classes too). Look | |
1432 | for getter/setter methods and internally declare | |
86d30f03 | 1433 | an artificial property based on them if found. */ |
736dea43 | 1434 | x = maybe_make_artificial_property_decl (NULL_TREE, |
1435 | NULL_TREE, | |
6bbb4715 | 1436 | rprotos, |
736dea43 | 1437 | property_ident, |
db496216 | 1438 | IS_CLASS (rtype), |
1439 | NULL_TREE); | |
1440 | } | |
1441 | else if (PROPERTY_OPTIONAL (x) && PROPERTY_READONLY (x)) | |
1442 | { | |
1443 | /* This is a special, complicated case. If the | |
1444 | property is optional, and is read-only, then the | |
1445 | property is always used for reading, but an | |
1446 | eventual existing non-property setter can be used | |
1447 | for writing. We create an artificial property | |
1448 | decl copying the getter from the optional | |
1449 | property, and looking up the setter in the | |
1450 | interface. */ | |
1451 | x = maybe_make_artificial_property_decl (NULL_TREE, | |
1452 | NULL_TREE, | |
1453 | rprotos, | |
1454 | property_ident, | |
1455 | false, | |
6bbb4715 | 1456 | PROPERTY_GETTER_NAME (x)); |
736dea43 | 1457 | } |
1458 | } | |
1459 | } | |
1460 | else if (objc_method_context) | |
1461 | { | |
1462 | /* Else, if we are inside a method it could be the case of | |
1463 | 'super' or 'self'. */ | |
1464 | tree interface_type = NULL_TREE; | |
1465 | tree t = object; | |
1466 | while (TREE_CODE (t) == COMPOUND_EXPR | |
1467 | || TREE_CODE (t) == MODIFY_EXPR | |
1468 | || CONVERT_EXPR_P (t) | |
1469 | || TREE_CODE (t) == COMPONENT_REF) | |
1470 | t = TREE_OPERAND (t, 0); | |
6bbb4715 | 1471 | |
1472 | if (t == UOBJC_SUPER_decl) | |
1a19222c | 1473 | interface_type = lookup_interface (CLASS_SUPER_NAME (implementation_template)); |
736dea43 | 1474 | else if (t == self_decl) |
1475 | interface_type = lookup_interface (CLASS_NAME (implementation_template)); | |
1476 | ||
736dea43 | 1477 | if (interface_type) |
1478 | { | |
1479 | if (TREE_CODE (objc_method_context) != CLASS_METHOD_DECL) | |
ad312852 | 1480 | x = lookup_property (interface_type, property_ident); |
6bbb4715 | 1481 | |
736dea43 | 1482 | if (x == NULL_TREE) |
1483 | { | |
1484 | /* Try the dot-syntax without a declared property. | |
1485 | If this is an access to 'self', it is possible | |
1486 | that they may refer to a setter/getter that is | |
1487 | not declared in the interface, but exists locally | |
1488 | in the implementation. In that case, get the | |
1489 | implementation context and use it. */ | |
1490 | tree implementation = NULL_TREE; | |
1491 | ||
1492 | if (t == self_decl) | |
1493 | implementation = objc_implementation_context; | |
6bbb4715 | 1494 | |
1495 | x = maybe_make_artificial_property_decl | |
736dea43 | 1496 | (interface_type, implementation, NULL_TREE, |
1497 | property_ident, | |
db496216 | 1498 | (TREE_CODE (objc_method_context) == CLASS_METHOD_DECL), |
1499 | NULL_TREE); | |
1500 | } | |
1501 | else if (PROPERTY_OPTIONAL (x) && PROPERTY_READONLY (x)) | |
1502 | { | |
1503 | tree implementation = NULL_TREE; | |
6bbb4715 | 1504 | |
db496216 | 1505 | if (t == self_decl) |
1506 | implementation = objc_implementation_context; | |
6bbb4715 | 1507 | |
db496216 | 1508 | x = maybe_make_artificial_property_decl (interface_type, |
1509 | implementation, | |
1510 | NULL_TREE, | |
1511 | property_ident, | |
1512 | false, | |
6bbb4715 | 1513 | PROPERTY_GETTER_NAME (x)); |
736dea43 | 1514 | } |
1515 | } | |
890881e7 | 1516 | } |
86c110ac | 1517 | } |
1518 | else | |
1519 | { | |
736dea43 | 1520 | /* This is the case where we have more information on 'rtype'. */ |
86c110ac | 1521 | tree basetype = TYPE_MAIN_VARIANT (rtype); |
1522 | ||
736dea43 | 1523 | /* Skip the pointer - if none, it's not an Objective-C object or |
1524 | class. */ | |
86c110ac | 1525 | if (basetype != NULL_TREE && TREE_CODE (basetype) == POINTER_TYPE) |
1526 | basetype = TREE_TYPE (basetype); | |
1527 | else | |
1528 | return NULL_TREE; | |
1529 | ||
736dea43 | 1530 | /* Traverse typedefs. */ |
86c110ac | 1531 | while (basetype != NULL_TREE |
6bbb4715 | 1532 | && TREE_CODE (basetype) == RECORD_TYPE |
86c110ac | 1533 | && OBJC_TYPE_NAME (basetype) |
1534 | && TREE_CODE (OBJC_TYPE_NAME (basetype)) == TYPE_DECL | |
1535 | && DECL_ORIGINAL_TYPE (OBJC_TYPE_NAME (basetype))) | |
1536 | basetype = DECL_ORIGINAL_TYPE (OBJC_TYPE_NAME (basetype)); | |
1537 | ||
1538 | if (basetype != NULL_TREE && TYPED_OBJECT (basetype)) | |
1539 | { | |
1540 | tree interface_type = TYPE_OBJC_INTERFACE (basetype); | |
9d9f5bb3 | 1541 | tree protocol_list = TYPE_OBJC_PROTOCOL_LIST (basetype); |
890881e7 | 1542 | |
6bbb4715 | 1543 | if (interface_type |
736dea43 | 1544 | && (TREE_CODE (interface_type) == CLASS_INTERFACE_TYPE |
1545 | || TREE_CODE (interface_type) == CATEGORY_INTERFACE_TYPE | |
1546 | || TREE_CODE (interface_type) == PROTOCOL_INTERFACE_TYPE)) | |
890881e7 | 1547 | { |
736dea43 | 1548 | /* Not sure 'rtype' could ever be a class here! Just |
1549 | for safety we keep the checks. */ | |
1550 | if (!IS_CLASS (rtype)) | |
1551 | { | |
1552 | x = lookup_property (interface_type, property_ident); | |
6bbb4715 | 1553 | |
736dea43 | 1554 | if (x == NULL_TREE) |
6bbb4715 | 1555 | x = lookup_property_in_protocol_list (protocol_list, |
736dea43 | 1556 | property_ident); |
1557 | } | |
6bbb4715 | 1558 | |
736dea43 | 1559 | if (x == NULL_TREE) |
1560 | { | |
1561 | /* Try the dot-syntax without a declared property. | |
1562 | If we are inside a method implementation, it is | |
1563 | possible that they may refer to a setter/getter | |
1564 | that is not declared in the interface, but exists | |
1565 | locally in the implementation. In that case, get | |
1566 | the implementation context and use it. */ | |
1567 | tree implementation = NULL_TREE; | |
1568 | ||
1569 | if (objc_implementation_context | |
6bbb4715 | 1570 | && CLASS_NAME (objc_implementation_context) |
736dea43 | 1571 | == OBJC_TYPE_NAME (interface_type)) |
1572 | implementation = objc_implementation_context; | |
6bbb4715 | 1573 | |
736dea43 | 1574 | x = maybe_make_artificial_property_decl (interface_type, |
1575 | implementation, | |
6bbb4715 | 1576 | protocol_list, |
736dea43 | 1577 | property_ident, |
db496216 | 1578 | IS_CLASS (rtype), |
1579 | NULL_TREE); | |
736dea43 | 1580 | } |
db496216 | 1581 | else if (PROPERTY_OPTIONAL (x) && PROPERTY_READONLY (x)) |
1582 | { | |
1583 | tree implementation = NULL_TREE; | |
1584 | ||
1585 | if (objc_implementation_context | |
6bbb4715 | 1586 | && CLASS_NAME (objc_implementation_context) |
db496216 | 1587 | == OBJC_TYPE_NAME (interface_type)) |
1588 | implementation = objc_implementation_context; | |
6bbb4715 | 1589 | |
db496216 | 1590 | x = maybe_make_artificial_property_decl (interface_type, |
1591 | implementation, | |
1592 | protocol_list, | |
1593 | property_ident, | |
1594 | false, | |
6bbb4715 | 1595 | PROPERTY_GETTER_NAME (x)); |
1596 | } | |
890881e7 | 1597 | } |
86c110ac | 1598 | } |
1599 | } | |
1600 | ||
1601 | if (x) | |
1602 | { | |
9d9f5bb3 | 1603 | tree expression; |
736dea43 | 1604 | tree getter_call; |
d67e8485 | 1605 | tree deprecated_method_prototype = NULL_TREE; |
9d9f5bb3 | 1606 | |
1607 | /* We have an additional nasty problem here; if this | |
1608 | PROPERTY_REF needs to become a 'getter', then the conversion | |
1609 | from PROPERTY_REF into a getter call happens in gimplify, | |
736dea43 | 1610 | after the selector table has already been generated and when |
1611 | it is too late to add another selector to it. To work around | |
1612 | the problem, we always create the getter call at this stage, | |
1613 | which puts the selector in the table. Note that if the | |
1614 | PROPERTY_REF becomes a 'setter' instead of a 'getter', then | |
1615 | we have added a selector too many to the selector table. | |
1616 | This is a little inefficient. | |
1617 | ||
1618 | Also note that method calls to 'self' and 'super' require the | |
1619 | context (self_decl, UOBJS_SUPER_decl, | |
1620 | objc_implementation_context etc) to be built correctly; this | |
1621 | is yet another reason why building the call at the gimplify | |
1622 | stage (when this context has been lost) is not very | |
1623 | practical. If we build it at this stage, we know it will | |
1624 | always be built correctly. | |
890881e7 | 1625 | |
1626 | If the PROPERTY_HAS_NO_GETTER() (ie, it is an artificial | |
1627 | property decl created to deal with a dotsyntax not really | |
1628 | referring to an existing property) then do not try to build a | |
1629 | call to the getter as there is no getter. */ | |
736dea43 | 1630 | if (PROPERTY_HAS_NO_GETTER (x)) |
1631 | getter_call = NULL_TREE; | |
1632 | else | |
d67e8485 | 1633 | getter_call = objc_finish_message_expr |
1634 | (object, PROPERTY_GETTER_NAME (x), NULL_TREE, | |
1635 | /* Disable the immediate deprecation warning if the getter | |
1636 | is deprecated, but record the fact that the getter is | |
1637 | deprecated by setting PROPERTY_REF_DEPRECATED_GETTER to | |
1638 | the method prototype. */ | |
1639 | &deprecated_method_prototype); | |
1640 | ||
1641 | expression = build4 (PROPERTY_REF, TREE_TYPE(x), object, x, getter_call, | |
1642 | deprecated_method_prototype); | |
736dea43 | 1643 | SET_EXPR_LOCATION (expression, input_location); |
1644 | TREE_SIDE_EFFECTS (expression) = 1; | |
6bbb4715 | 1645 | |
9d9f5bb3 | 1646 | return expression; |
86c110ac | 1647 | } |
86c110ac | 1648 | |
9d9f5bb3 | 1649 | return NULL_TREE; |
86c110ac | 1650 | } |
1651 | ||
b0d0931f | 1652 | /* This hook routine is invoked by the parser when an expression such |
1653 | as 'xxx.yyy' is parsed, and 'xxx' is a class name. This is the | |
1654 | Objective-C 2.0 dot-syntax applied to classes, so we need to | |
1655 | convert it into a setter/getter call on the class. */ | |
1656 | tree | |
1657 | objc_build_class_component_ref (tree class_name, tree property_ident) | |
1658 | { | |
1659 | tree x = NULL_TREE; | |
1660 | tree object, rtype; | |
6bbb4715 | 1661 | |
b0d0931f | 1662 | if (flag_objc1_only) |
1663 | error_at (input_location, "the dot syntax is not available in Objective-C 1.0"); | |
6bbb4715 | 1664 | |
b0d0931f | 1665 | if (class_name == NULL_TREE || class_name == error_mark_node |
1666 | || TREE_CODE (class_name) != IDENTIFIER_NODE) | |
1667 | return error_mark_node; | |
6bbb4715 | 1668 | |
b0d0931f | 1669 | if (property_ident == NULL_TREE || property_ident == error_mark_node |
1670 | || TREE_CODE (property_ident) != IDENTIFIER_NODE) | |
1671 | return NULL_TREE; | |
6bbb4715 | 1672 | |
b0d0931f | 1673 | object = objc_get_class_reference (class_name); |
1674 | if (!object) | |
1675 | { | |
1676 | /* We know that 'class_name' is an Objective-C class name as the | |
1677 | parser won't call this function if it is not. This is only a | |
1678 | double-check for safety. */ | |
6bbb4715 | 1679 | error_at (input_location, "could not find class %qE", class_name); |
b0d0931f | 1680 | return error_mark_node; |
1681 | } | |
1682 | ||
1683 | rtype = lookup_interface (class_name); | |
1684 | if (!rtype) | |
1685 | { | |
1686 | /* Again, this should never happen, but we do check. */ | |
6bbb4715 | 1687 | error_at (input_location, "could not find interface for class %qE", class_name); |
b0d0931f | 1688 | return error_mark_node; |
1689 | } | |
c1cfb0f5 | 1690 | else |
1691 | { | |
1692 | if (TREE_DEPRECATED (rtype)) | |
6bbb4715 | 1693 | warning (OPT_Wdeprecated_declarations, "class %qE is deprecated", class_name); |
c1cfb0f5 | 1694 | } |
b0d0931f | 1695 | |
736dea43 | 1696 | x = maybe_make_artificial_property_decl (rtype, NULL_TREE, NULL_TREE, |
b0d0931f | 1697 | property_ident, |
db496216 | 1698 | true, NULL_TREE); |
6bbb4715 | 1699 | |
b0d0931f | 1700 | if (x) |
1701 | { | |
1702 | tree expression; | |
736dea43 | 1703 | tree getter_call; |
d67e8485 | 1704 | tree deprecated_method_prototype = NULL_TREE; |
b0d0931f | 1705 | |
736dea43 | 1706 | if (PROPERTY_HAS_NO_GETTER (x)) |
1707 | getter_call = NULL_TREE; | |
1708 | else | |
d67e8485 | 1709 | getter_call = objc_finish_message_expr |
1710 | (object, PROPERTY_GETTER_NAME (x), NULL_TREE, | |
1711 | &deprecated_method_prototype); | |
b0d0931f | 1712 | |
d67e8485 | 1713 | expression = build4 (PROPERTY_REF, TREE_TYPE(x), object, x, getter_call, |
1714 | deprecated_method_prototype); | |
b0d0931f | 1715 | SET_EXPR_LOCATION (expression, input_location); |
1716 | TREE_SIDE_EFFECTS (expression) = 1; | |
736dea43 | 1717 | |
b0d0931f | 1718 | return expression; |
1719 | } | |
1720 | else | |
1721 | { | |
6bbb4715 | 1722 | error_at (input_location, "could not find setter/getter for %qE in class %qE", |
1723 | property_ident, class_name); | |
b0d0931f | 1724 | return error_mark_node; |
1725 | } | |
1726 | ||
1727 | return NULL_TREE; | |
1728 | } | |
1729 | ||
1730 | ||
1731 | ||
9d9f5bb3 | 1732 | /* This is used because we don't want to expose PROPERTY_REF to the |
1733 | C/C++ frontends. Maybe we should! */ | |
1734 | bool | |
1735 | objc_is_property_ref (tree node) | |
86c110ac | 1736 | { |
9d9f5bb3 | 1737 | if (node && TREE_CODE (node) == PROPERTY_REF) |
1738 | return true; | |
86c110ac | 1739 | else |
9d9f5bb3 | 1740 | return false; |
86c110ac | 1741 | } |
1742 | ||
6d922cb7 | 1743 | /* This function builds a setter call for a PROPERTY_REF (real, for a |
1744 | declared property, or artificial, for a dot-syntax accessor which | |
1745 | is not corresponding to a property). 'lhs' must be a PROPERTY_REF | |
1746 | (the caller must check this beforehand). 'rhs' is the value to | |
1747 | assign to the property. A plain setter call is returned, or | |
1748 | error_mark_node if the property is readonly. */ | |
1749 | ||
1750 | static tree | |
1751 | objc_build_setter_call (tree lhs, tree rhs) | |
1752 | { | |
1753 | tree object_expr = PROPERTY_REF_OBJECT (lhs); | |
1754 | tree property_decl = PROPERTY_REF_PROPERTY_DECL (lhs); | |
6bbb4715 | 1755 | |
6d922cb7 | 1756 | if (PROPERTY_READONLY (property_decl)) |
1757 | { | |
6bbb4715 | 1758 | error ("readonly property can not be set"); |
6d922cb7 | 1759 | return error_mark_node; |
1760 | } | |
1761 | else | |
1762 | { | |
1763 | tree setter_argument = build_tree_list (NULL_TREE, rhs); | |
1764 | tree setter; | |
6bbb4715 | 1765 | |
6d922cb7 | 1766 | /* TODO: Check that the setter return type is 'void'. */ |
1767 | ||
1768 | /* TODO: Decay arguments in C. */ | |
6bbb4715 | 1769 | setter = objc_finish_message_expr (object_expr, |
6d922cb7 | 1770 | PROPERTY_SETTER_NAME (property_decl), |
d67e8485 | 1771 | setter_argument, NULL); |
6d922cb7 | 1772 | return setter; |
1773 | } | |
1774 | ||
1775 | /* Unreachable, but the compiler may not realize. */ | |
1776 | return error_mark_node; | |
1777 | } | |
1778 | ||
9d9f5bb3 | 1779 | /* This hook routine is called when a MODIFY_EXPR is being built. We |
1780 | check what is being modified; if it is a PROPERTY_REF, we need to | |
1781 | generate a 'setter' function call for the property. If this is not | |
1782 | a PROPERTY_REF, we return NULL_TREE and the C/C++ frontend will go | |
1783 | on creating their MODIFY_EXPR. | |
86c110ac | 1784 | |
9d9f5bb3 | 1785 | This is used for example if you write |
86c110ac | 1786 | |
9d9f5bb3 | 1787 | object.count = 1; |
86c110ac | 1788 | |
9d9f5bb3 | 1789 | where 'count' is a property. The left-hand side creates a |
1790 | PROPERTY_REF, and then the compiler tries to generate a MODIFY_EXPR | |
1791 | to assign something to it. We intercept that here, and generate a | |
1792 | call to the 'setter' method instead. */ | |
1793 | tree | |
1794 | objc_maybe_build_modify_expr (tree lhs, tree rhs) | |
86c110ac | 1795 | { |
9d9f5bb3 | 1796 | if (lhs && TREE_CODE (lhs) == PROPERTY_REF) |
86c110ac | 1797 | { |
6d922cb7 | 1798 | /* Building a simple call to the setter method would work for cases such as |
86c110ac | 1799 | |
6d922cb7 | 1800 | object.count = 1; |
890881e7 | 1801 | |
6d922cb7 | 1802 | but wouldn't work for cases such as |
890881e7 | 1803 | |
6d922cb7 | 1804 | count = object2.count = 1; |
1805 | ||
1806 | to get these to work with very little effort, we build a | |
1807 | compound statement which does the setter call (to set the | |
1808 | property to 'rhs'), but which can also be evaluated returning | |
d098f394 | 1809 | the 'rhs'. If the 'rhs' has no side effects, we can simply |
1810 | evaluate it twice, building | |
1811 | ||
1812 | ([object setProperty: rhs]; rhs) | |
1813 | ||
1814 | If it has side effects, we put it in a temporary variable first, | |
1815 | so we create the following: | |
6d922cb7 | 1816 | |
1817 | (temp = rhs; [object setProperty: temp]; temp) | |
d098f394 | 1818 | |
1819 | setter_argument is rhs in the first case, and temp in the second | |
1820 | case. | |
6d922cb7 | 1821 | */ |
d098f394 | 1822 | tree setter_argument; |
1823 | ||
6d922cb7 | 1824 | /* s1, s2 and s3 are the tree statements that we need in the |
1825 | compound expression. */ | |
1826 | tree s1, s2, s3, compound_expr; | |
d098f394 | 1827 | |
1828 | if (TREE_SIDE_EFFECTS (rhs)) | |
1829 | { | |
1830 | tree bind; | |
6bbb4715 | 1831 | |
d098f394 | 1832 | /* Declare __objc_property_temp in a local bind. */ |
1833 | setter_argument = objc_create_temporary_var (TREE_TYPE (rhs), "__objc_property_temp"); | |
1834 | DECL_SOURCE_LOCATION (setter_argument) = input_location; | |
1835 | bind = build3 (BIND_EXPR, void_type_node, setter_argument, NULL, NULL); | |
1836 | SET_EXPR_LOCATION (bind, input_location); | |
1837 | TREE_SIDE_EFFECTS (bind) = 1; | |
1838 | add_stmt (bind); | |
1839 | ||
1840 | /* s1: x = rhs */ | |
1841 | s1 = build_modify_expr (input_location, setter_argument, NULL_TREE, | |
1842 | NOP_EXPR, | |
1843 | input_location, rhs, NULL_TREE); | |
1844 | SET_EXPR_LOCATION (s1, input_location); | |
1845 | } | |
1846 | else | |
1847 | { | |
1848 | /* No s1. */ | |
1849 | setter_argument = rhs; | |
1850 | s1 = NULL_TREE; | |
1851 | } | |
6bbb4715 | 1852 | |
6d922cb7 | 1853 | /* Now build the compound statement. */ |
6bbb4715 | 1854 | |
d098f394 | 1855 | /* s2: [object setProperty: x] */ |
1856 | s2 = objc_build_setter_call (lhs, setter_argument); | |
6bbb4715 | 1857 | |
d098f394 | 1858 | /* This happens if building the setter failed because the |
1859 | property is readonly. */ | |
6d922cb7 | 1860 | if (s2 == error_mark_node) |
1861 | return error_mark_node; | |
1862 | ||
1863 | SET_EXPR_LOCATION (s2, input_location); | |
6bbb4715 | 1864 | |
d098f394 | 1865 | /* s3: x */ |
1866 | s3 = convert (TREE_TYPE (lhs), setter_argument); | |
6d922cb7 | 1867 | |
d098f394 | 1868 | /* Now build the compound statement (s1, s2, s3) or (s2, s3) as |
1869 | appropriate. */ | |
1870 | if (s1) | |
1871 | compound_expr = build_compound_expr (input_location, build_compound_expr (input_location, s1, s2), s3); | |
1872 | else | |
6bbb4715 | 1873 | compound_expr = build_compound_expr (input_location, s2, s3); |
6d922cb7 | 1874 | |
1875 | /* Without this, with -Wall you get a 'valued computed is not | |
1876 | used' every time there is a "object.property = x" where the | |
1877 | value of the resulting MODIFY_EXPR is not used. That is | |
1878 | correct (maybe a more sophisticated implementation could | |
1879 | avoid generating the compound expression if not needed), but | |
1880 | we need to turn it off. */ | |
1881 | TREE_NO_WARNING (compound_expr) = 1; | |
1882 | return compound_expr; | |
9d9f5bb3 | 1883 | } |
1884 | else | |
1885 | return NULL_TREE; | |
86c110ac | 1886 | } |
1887 | ||
e4a7640a | 1888 | /* This hook is called by the frontend when one of the four unary |
1889 | expressions PREINCREMENT_EXPR, POSTINCREMENT_EXPR, | |
1890 | PREDECREMENT_EXPR and POSTDECREMENT_EXPR is being built with an | |
1891 | argument which is a PROPERTY_REF. For example, this happens if you have | |
1892 | ||
1893 | object.count++; | |
1894 | ||
1895 | where 'count' is a property. We need to use the 'getter' and | |
1896 | 'setter' for the property in an appropriate way to build the | |
1897 | appropriate expression. 'code' is the code for the expression (one | |
1898 | of the four mentioned above); 'argument' is the PROPERTY_REF, and | |
6bbb4715 | 1899 | 'increment' is how much we need to add or subtract. */ |
e4a7640a | 1900 | tree |
1901 | objc_build_incr_expr_for_property_ref (location_t location, | |
6bbb4715 | 1902 | enum tree_code code, |
e4a7640a | 1903 | tree argument, tree increment) |
1904 | { | |
1905 | /* Here are the expressions that we want to build: | |
1906 | ||
1907 | For PREINCREMENT_EXPR / PREDECREMENT_EXPR: | |
1908 | (temp = [object property] +/- increment, [object setProperty: temp], temp) | |
6bbb4715 | 1909 | |
e4a7640a | 1910 | For POSTINCREMENT_EXPR / POSTECREMENT_EXPR: |
1911 | (temp = [object property], [object setProperty: temp +/- increment], temp) */ | |
6bbb4715 | 1912 | |
e4a7640a | 1913 | tree temp_variable_decl, bind; |
1914 | /* s1, s2 and s3 are the tree statements that we need in the | |
1915 | compound expression. */ | |
6d922cb7 | 1916 | tree s1, s2, s3, compound_expr; |
6bbb4715 | 1917 | |
e4a7640a | 1918 | /* Safety check. */ |
1919 | if (!argument || TREE_CODE (argument) != PROPERTY_REF) | |
1920 | return error_mark_node; | |
1921 | ||
1922 | /* Declare __objc_property_temp in a local bind. */ | |
1923 | temp_variable_decl = objc_create_temporary_var (TREE_TYPE (argument), "__objc_property_temp"); | |
1924 | DECL_SOURCE_LOCATION (temp_variable_decl) = location; | |
1925 | bind = build3 (BIND_EXPR, void_type_node, temp_variable_decl, NULL, NULL); | |
1926 | SET_EXPR_LOCATION (bind, location); | |
1927 | TREE_SIDE_EFFECTS (bind) = 1; | |
1928 | add_stmt (bind); | |
6bbb4715 | 1929 | |
e4a7640a | 1930 | /* Now build the compound statement. */ |
6bbb4715 | 1931 | |
e4a7640a | 1932 | /* Note that the 'getter' is generated at gimplify time; at this |
1933 | time, we can simply put the property_ref (ie, argument) wherever | |
1934 | we want the getter ultimately to be. */ | |
6bbb4715 | 1935 | |
e4a7640a | 1936 | /* s1: __objc_property_temp = [object property] <+/- increment> */ |
1937 | switch (code) | |
1938 | { | |
6bbb4715 | 1939 | case PREINCREMENT_EXPR: |
e4a7640a | 1940 | /* __objc_property_temp = [object property] + increment */ |
6d922cb7 | 1941 | s1 = build_modify_expr (location, temp_variable_decl, NULL_TREE, |
1942 | NOP_EXPR, | |
6bbb4715 | 1943 | location, build2 (PLUS_EXPR, TREE_TYPE (argument), |
6d922cb7 | 1944 | argument, increment), NULL_TREE); |
e4a7640a | 1945 | break; |
1946 | case PREDECREMENT_EXPR: | |
1947 | /* __objc_property_temp = [object property] - increment */ | |
6d922cb7 | 1948 | s1 = build_modify_expr (location, temp_variable_decl, NULL_TREE, |
1949 | NOP_EXPR, | |
6bbb4715 | 1950 | location, build2 (MINUS_EXPR, TREE_TYPE (argument), |
6d922cb7 | 1951 | argument, increment), NULL_TREE); |
e4a7640a | 1952 | break; |
1953 | case POSTINCREMENT_EXPR: | |
1954 | case POSTDECREMENT_EXPR: | |
1955 | /* __objc_property_temp = [object property] */ | |
6d922cb7 | 1956 | s1 = build_modify_expr (location, temp_variable_decl, NULL_TREE, |
1957 | NOP_EXPR, | |
1958 | location, argument, NULL_TREE); | |
e4a7640a | 1959 | break; |
1960 | default: | |
1961 | gcc_unreachable (); | |
1962 | } | |
6bbb4715 | 1963 | |
e4a7640a | 1964 | /* s2: [object setProperty: __objc_property_temp <+/- increment>] */ |
1965 | switch (code) | |
1966 | { | |
6bbb4715 | 1967 | case PREINCREMENT_EXPR: |
e4a7640a | 1968 | case PREDECREMENT_EXPR: |
1969 | /* [object setProperty: __objc_property_temp] */ | |
6d922cb7 | 1970 | s2 = objc_build_setter_call (argument, temp_variable_decl); |
e4a7640a | 1971 | break; |
1972 | case POSTINCREMENT_EXPR: | |
1973 | /* [object setProperty: __objc_property_temp + increment] */ | |
6d922cb7 | 1974 | s2 = objc_build_setter_call (argument, |
6bbb4715 | 1975 | build2 (PLUS_EXPR, TREE_TYPE (argument), |
6d922cb7 | 1976 | temp_variable_decl, increment)); |
e4a7640a | 1977 | break; |
1978 | case POSTDECREMENT_EXPR: | |
1979 | /* [object setProperty: __objc_property_temp - increment] */ | |
6d922cb7 | 1980 | s2 = objc_build_setter_call (argument, |
6bbb4715 | 1981 | build2 (MINUS_EXPR, TREE_TYPE (argument), |
6d922cb7 | 1982 | temp_variable_decl, increment)); |
e4a7640a | 1983 | break; |
1984 | default: | |
1985 | gcc_unreachable (); | |
1986 | } | |
1987 | ||
1988 | /* This happens if building the setter failed because the property | |
1989 | is readonly. */ | |
1990 | if (s2 == error_mark_node) | |
1991 | return error_mark_node; | |
1992 | ||
6bbb4715 | 1993 | SET_EXPR_LOCATION (s2, location); |
1994 | ||
e4a7640a | 1995 | /* s3: __objc_property_temp */ |
6d922cb7 | 1996 | s3 = convert (TREE_TYPE (argument), temp_variable_decl); |
6bbb4715 | 1997 | |
e4a7640a | 1998 | /* Now build the compound statement (s1, s2, s3) */ |
6d922cb7 | 1999 | compound_expr = build_compound_expr (location, build_compound_expr (location, s1, s2), s3); |
2000 | ||
2001 | /* Prevent C++ from warning with -Wall that "right operand of comma | |
2002 | operator has no effect". */ | |
2003 | TREE_NO_WARNING (compound_expr) = 1; | |
2004 | return compound_expr; | |
e4a7640a | 2005 | } |
2006 | ||
13dcc150 | 2007 | tree |
45b2b110 | 2008 | objc_build_method_signature (bool is_class_method, tree rettype, tree selector, |
450302fe | 2009 | tree optparms, bool ellipsis) |
13dcc150 | 2010 | { |
45b2b110 | 2011 | if (is_class_method) |
2012 | return build_method_decl (CLASS_METHOD_DECL, rettype, selector, | |
2013 | optparms, ellipsis); | |
2014 | else | |
2015 | return build_method_decl (INSTANCE_METHOD_DECL, rettype, selector, | |
2016 | optparms, ellipsis); | |
13dcc150 | 2017 | } |
2018 | ||
2019 | void | |
45b2b110 | 2020 | objc_add_method_declaration (bool is_class_method, tree decl, tree attributes) |
13dcc150 | 2021 | { |
2022 | if (!objc_interface_context) | |
d4a8fb25 | 2023 | { |
2024 | /* PS: At the moment, due to how the parser works, it should be | |
2025 | impossible to get here. But it's good to have the check in | |
2026 | case the parser changes. | |
2027 | */ | |
c05be867 | 2028 | fatal_error (input_location, |
2029 | "method declaration not in @interface context"); | |
d4a8fb25 | 2030 | } |
13dcc150 | 2031 | |
1ef143b6 | 2032 | if (flag_objc1_only && attributes) |
2033 | error_at (input_location, "method attributes are not available in Objective-C 1.0"); | |
2034 | ||
40c8d1dd | 2035 | objc_decl_method_attributes (&decl, attributes, 0); |
13dcc150 | 2036 | objc_add_method (objc_interface_context, |
2037 | decl, | |
45b2b110 | 2038 | is_class_method, |
069761fb | 2039 | objc_method_optional_flag); |
13dcc150 | 2040 | } |
2041 | ||
d4a8fb25 | 2042 | /* Return 'true' if the method definition could be started, and |
2043 | 'false' if not (because we are outside an @implementation context). | |
4232a958 | 2044 | EXPR is NULL or an expression that needs to be evaluated for the |
2045 | side effects of array size expressions in the parameters. | |
d4a8fb25 | 2046 | */ |
2047 | bool | |
4232a958 | 2048 | objc_start_method_definition (bool is_class_method, tree decl, tree attributes, |
2049 | tree expr) | |
13dcc150 | 2050 | { |
2051 | if (!objc_implementation_context) | |
d4a8fb25 | 2052 | { |
2053 | error ("method definition not in @implementation context"); | |
2054 | return false; | |
2055 | } | |
13dcc150 | 2056 | |
06517bd4 | 2057 | if (decl != NULL_TREE && METHOD_SEL_NAME (decl) == error_mark_node) |
2058 | return false; | |
2059 | ||
b24ba8fa | 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 | ||
8c582e4f | 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 | ||
13dcc150 | 2072 | objc_add_method (objc_implementation_context, |
2073 | decl, | |
45b2b110 | 2074 | is_class_method, |
069761fb | 2075 | /* is optional */ false); |
4232a958 | 2076 | start_method_def (decl, expr); |
d4a8fb25 | 2077 | return true; |
13dcc150 | 2078 | } |
2079 | ||
2080 | void | |
2081 | objc_add_instance_variable (tree decl) | |
2082 | { | |
2083 | (void) add_instance_variable (objc_ivar_context, | |
4a8875ed | 2084 | objc_ivar_visibility, |
13dcc150 | 2085 | decl); |
2086 | } | |
2087 | ||
ceb0f408 | 2088 | /* Construct a C struct with same name as KLASS, a base struct with tag |
499ea517 | 2089 | SUPER_NAME (if any), and FIELDS indicated. */ |
d7c168e8 | 2090 | |
499ea517 | 2091 | static tree |
ceb0f408 | 2092 | objc_build_struct (tree klass, tree fields, tree super_name) |
499ea517 | 2093 | { |
ceb0f408 | 2094 | tree name = CLASS_NAME (klass); |
0b09525f | 2095 | tree s = objc_start_struct (name); |
499ea517 | 2096 | tree super = (super_name ? xref_tag (RECORD_TYPE, super_name) : NULL_TREE); |
6ab3a6e6 | 2097 | tree t; |
1e094109 | 2098 | vec<tree> objc_info = vNULL; |
6ab3a6e6 | 2099 | int i; |
499ea517 | 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. */ | |
e60a6f7b | 2105 | tree base = build_decl (input_location, |
2106 | FIELD_DECL, NULL_TREE, super); | |
499ea517 | 2107 | tree field = TYPE_FIELDS (super); |
2108 | ||
1767a056 | 2109 | while (field && DECL_CHAIN (field) |
2110 | && TREE_CODE (DECL_CHAIN (field)) == FIELD_DECL) | |
2111 | field = DECL_CHAIN (field); | |
499ea517 | 2112 | |
08cc44e7 | 2113 | /* For ObjC ABI purposes, the "packed" size of a base class is |
0616a948 | 2114 | the sum of the offset and the size (in bits) of the last field |
2115 | in the class. */ | |
499ea517 | 2116 | DECL_SIZE (base) |
2117 | = (field && TREE_CODE (field) == FIELD_DECL | |
6db57367 | 2118 | ? size_binop (PLUS_EXPR, |
499ea517 | 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. */ | |
1767a056 | 2140 | DECL_CHAIN (base) = fields; |
499ea517 | 2141 | fields = base; |
2142 | } | |
2143 | ||
2f78a7ce | 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 | |
0bee387e | 2153 | finish_struct(), and then reinstate it afterwards. */ |
2154 | ||
2f78a7ce | 2155 | for (t = TYPE_MAIN_VARIANT (s); t; t = TYPE_NEXT_VARIANT (t)) |
2b03c8ee | 2156 | { |
2f78a7ce | 2157 | INIT_TYPE_OBJC_INFO (t); |
f1f41a6c | 2158 | objc_info.safe_push (TYPE_OBJC_INFO (t)); |
2b03c8ee | 2159 | } |
0bee387e | 2160 | |
0b09525f | 2161 | s = objc_finish_struct (s, fields); |
499ea517 | 2162 | |
2f78a7ce | 2163 | for (i = 0, t = TYPE_MAIN_VARIANT (s); t; t = TYPE_NEXT_VARIANT (t), i++) |
8e1be677 | 2164 | { |
2f78a7ce | 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. */ | |
f1f41a6c | 2189 | TYPE_OBJC_INFO (t) = objc_info[i]; |
2f78a7ce | 2190 | /* Replace the IDENTIFIER_NODE with an actual @interface now |
2191 | that we have it. */ | |
ceb0f408 | 2192 | TYPE_OBJC_INTERFACE (t) = klass; |
8e1be677 | 2193 | } |
f1f41a6c | 2194 | objc_info.release (); |
0bee387e | 2195 | |
499ea517 | 2196 | /* Use TYPE_BINFO structures to point at the super class, if any. */ |
2197 | objc_xref_basetypes (s, super); | |
2198 | ||
8e1be677 | 2199 | /* Mark this struct as a class template. */ |
ceb0f408 | 2200 | CLASS_STATIC_TEMPLATE (klass) = s; |
8e1be677 | 2201 | |
499ea517 | 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 | { | |
d7489d8d | 2217 | if (local_variables_to_volatilize == NULL) |
f1f41a6c | 2218 | vec_alloc (local_variables_to_volatilize, 8); |
499ea517 | 2219 | |
f1f41a6c | 2220 | vec_safe_push (local_variables_to_volatilize, decl); |
d7489d8d | 2221 | } |
2222 | } | |
499ea517 | 2223 | |
d7489d8d | 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; | |
f1f41a6c | 2239 | FOR_EACH_VEC_ELT (*local_variables_to_volatilize, i, decl) |
d7489d8d | 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; | |
499ea517 | 2248 | #ifndef OBJCPLUS |
d7489d8d | 2249 | C_DECL_REGISTER (decl) = 0; |
499ea517 | 2250 | #endif |
d7489d8d | 2251 | } |
2252 | ||
2253 | /* Now we delete the vector. This sets it to NULL as well. */ | |
f1f41a6c | 2254 | vec_free (local_variables_to_volatilize); |
499ea517 | 2255 | } |
2256 | } | |
2257 | ||
2258 | /* Check if protocol PROTO is adopted (directly or indirectly) by class CLS | |
97419919 | 2259 | (including its categories and superclasses) or by object type TYP. |
499ea517 | 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) | |
d7c168e8 | 2264 | { |
499ea517 | 2265 | bool class_type = (cls != NULL_TREE); |
d7c168e8 | 2266 | |
499ea517 | 2267 | while (cls) |
d7c168e8 | 2268 | { |
499ea517 | 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)); | |
d7c168e8 | 2280 | } |
499ea517 | 2281 | |
2282 | /* Check for any protocols attached directly to the object type. */ | |
2283 | if (TYPE_HAS_OBJC_INFO (typ)) | |
d7c168e8 | 2284 | { |
499ea517 | 2285 | if (lookup_protocol_in_reflist (TYPE_OBJC_PROTOCOL_LIST (typ), proto)) |
2286 | return true; | |
2287 | } | |
2288 | ||
2289 | if (warn) | |
2290 | { | |
a608187f | 2291 | *errbuf = 0; |
499ea517 | 2292 | gen_type_name_0 (class_type ? typ : TYPE_POINTER_TO (typ)); |
499ea517 | 2293 | /* NB: Types 'id' and 'Class' cannot reasonably be described as |
2294 | "implementing" a given protocol, since they do not have an | |
2295 | implementation. */ | |
a608187f | 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)); | |
d7c168e8 | 2302 | } |
499ea517 | 2303 | |
2304 | return false; | |
d7c168e8 | 2305 | } |
2306 | ||
499ea517 | 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; | |
d7c168e8 | 2324 | |
499ea517 | 2325 | if (!objc_lookup_protocol (TREE_VALUE (p), rcls, rtyp, warn)) |
2326 | return warn; | |
2327 | } | |
02c2efaa | 2328 | |
499ea517 | 2329 | /* Repeat for superclasses. */ |
2330 | lcls = lookup_interface (CLASS_SUPER_NAME (lcls)); | |
2331 | } | |
02c2efaa | 2332 | |
499ea517 | 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; | |
fadbd30d | 2339 | |
499ea517 | 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 | ||
4abfc532 | 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 | ||
499ea517 | 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 | |
ad312852 | 2387 | instead, if needed. If either LTYP or RTYP is not an Objective-C |
2388 | type, the routine must return 'false'. | |
499ea517 | 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; | |
a198e083 | 2395 | -3 Comparison (LTYP and RTYP may match in either direction); |
ad312852 | 2396 | -4 Silent comparison (for C++ overload resolution); |
6bbb4715 | 2397 | -5 Silent "specialization" comparison for RTYP to be a "specialization" |
2398 | of LTYP (a specialization means that RTYP is LTYP plus some constraints, | |
ad312852 | 2399 | so that each object of type RTYP is also of type LTYP). This is used |
2400 | when comparing property types. */ | |
499ea517 | 2401 | |
2402 | bool | |
2403 | objc_compare_types (tree ltyp, tree rtyp, int argno, tree callee) | |
fc304191 | 2404 | { |
499ea517 | 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; | |
c450c529 | 2411 | |
499ea517 | 2412 | do |
c450c529 | 2413 | { |
499ea517 | 2414 | ltyp = TREE_TYPE (ltyp); /* Remove indirections. */ |
2415 | rtyp = TREE_TYPE (rtyp); | |
2416 | } | |
2417 | while (POINTER_TYPE_P (ltyp) && POINTER_TYPE_P (rtyp)); | |
c450c529 | 2418 | |
b24ba8fa | 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 | { | |
dffb24a6 | 2423 | function_args_iterator liter, riter; |
2424 | ||
b24ba8fa | 2425 | /* Return types must be covariant. */ |
2426 | if (!comptypes (TREE_TYPE (ltyp), TREE_TYPE (rtyp)) | |
2427 | && !objc_compare_types (TREE_TYPE (ltyp), TREE_TYPE (rtyp), | |
2428 | argno, callee)) | |
2429 | return false; | |
2430 | ||
2431 | /* Argument types must be contravariant. */ | |
dffb24a6 | 2432 | function_args_iter_init (&liter, ltyp); |
2433 | function_args_iter_init (&riter, rtyp); | |
2434 | ||
2435 | while (1) | |
b24ba8fa | 2436 | { |
dffb24a6 | 2437 | ltyp = function_args_iter_cond (&liter); |
2438 | rtyp = function_args_iter_cond (&riter); | |
2439 | ||
2440 | /* If we've exhaused both lists simulateously, we're done. */ | |
2441 | if (ltyp == NULL_TREE && rtyp == NULL_TREE) | |
2442 | break; | |
2443 | ||
2444 | /* If one list is shorter than the other, they fail to match. */ | |
2445 | if (ltyp == NULL_TREE || rtyp == NULL_TREE) | |
b24ba8fa | 2446 | return false; |
b24ba8fa | 2447 | |
dffb24a6 | 2448 | if (!comptypes (rtyp, ltyp) |
2449 | && !objc_compare_types (rtyp, ltyp, argno, callee)) | |
2450 | return false; | |
2451 | ||
2452 | function_args_iter_next (&liter); | |
2453 | function_args_iter_next (&riter); | |
2454 | } | |
2455 | ||
2456 | return true; | |
b24ba8fa | 2457 | } |
2458 | ||
499ea517 | 2459 | /* Past this point, we are only interested in ObjC class instances, |
2460 | or 'id' or 'Class'. */ | |
2461 | if (TREE_CODE (ltyp) != RECORD_TYPE || TREE_CODE (rtyp) != RECORD_TYPE) | |
2462 | return false; | |
c450c529 | 2463 | |
499ea517 | 2464 | if (!objc_is_object_id (ltyp) && !objc_is_class_id (ltyp) |
2465 | && !TYPE_HAS_OBJC_INFO (ltyp)) | |
2466 | return false; | |
9e8a7e85 | 2467 | |
499ea517 | 2468 | if (!objc_is_object_id (rtyp) && !objc_is_class_id (rtyp) |
2469 | && !TYPE_HAS_OBJC_INFO (rtyp)) | |
2470 | return false; | |
39b8ddc6 | 2471 | |
a198e083 | 2472 | /* Past this point, we are committed to returning 'true' to the caller |
2473 | (unless performing a silent comparison; see below). However, we can | |
2474 | still warn about type and/or protocol mismatches. */ | |
c450c529 | 2475 | |
499ea517 | 2476 | if (TYPE_HAS_OBJC_INFO (ltyp)) |
2477 | { | |
2478 | lcls = TYPE_OBJC_INTERFACE (ltyp); | |
2479 | lproto = TYPE_OBJC_PROTOCOL_LIST (ltyp); | |
2480 | } | |
2481 | else | |
2482 | lcls = lproto = NULL_TREE; | |
c450c529 | 2483 | |
499ea517 | 2484 | if (TYPE_HAS_OBJC_INFO (rtyp)) |
2485 | { | |
2486 | rcls = TYPE_OBJC_INTERFACE (rtyp); | |
2487 | rproto = TYPE_OBJC_PROTOCOL_LIST (rtyp); | |
2488 | } | |
2489 | else | |
2490 | rcls = rproto = NULL_TREE; | |
9e8a7e85 | 2491 | |
8e1be677 | 2492 | /* If we could not find an @interface declaration, we must have |
2493 | only seen a @class declaration; for purposes of type comparison, | |
2494 | treat it as a stand-alone (root) class. */ | |
2495 | ||
2496 | if (lcls && TREE_CODE (lcls) == IDENTIFIER_NODE) | |
2497 | lcls = NULL_TREE; | |
2498 | ||
2499 | if (rcls && TREE_CODE (rcls) == IDENTIFIER_NODE) | |
2500 | rcls = NULL_TREE; | |
2501 | ||
ad312852 | 2502 | /* If either type is an unqualified 'id', we're done. This is because |
2503 | an 'id' can be assigned to or from any type with no warnings. */ | |
2504 | if (argno != -5) | |
2505 | { | |
2506 | if ((!lproto && objc_is_object_id (ltyp)) | |
2507 | || (!rproto && objc_is_object_id (rtyp))) | |
2508 | return true; | |
2509 | } | |
2510 | else | |
2511 | { | |
2512 | /* For property checks, though, an 'id' is considered the most | |
2513 | general type of object, hence if you try to specialize an | |
2514 | 'NSArray *' (ltyp) property with an 'id' (rtyp) one, we need | |
2515 | to warn. */ | |
2516 | if (!lproto && objc_is_object_id (ltyp)) | |
2517 | return true; | |
2518 | } | |
6bbb4715 | 2519 | |
499ea517 | 2520 | pointers_compatible = (TYPE_MAIN_VARIANT (ltyp) == TYPE_MAIN_VARIANT (rtyp)); |
e0ece38e | 2521 | |
499ea517 | 2522 | /* If the underlying types are the same, and at most one of them has |
2523 | a protocol list, we do not need to issue any diagnostics. */ | |
2524 | if (pointers_compatible && (!lproto || !rproto)) | |
2525 | return true; | |
9e8a7e85 | 2526 | |
499ea517 | 2527 | /* If exactly one of the types is 'Class', issue a diagnostic; any |
2528 | exceptions of this rule have already been handled. */ | |
2529 | if (objc_is_class_id (ltyp) ^ objc_is_class_id (rtyp)) | |
2530 | pointers_compatible = false; | |
2531 | /* Otherwise, check for inheritance relations. */ | |
2532 | else | |
2533 | { | |
2534 | if (!pointers_compatible) | |
ad312852 | 2535 | { |
2536 | /* Again, if any of the two is an 'id', we're satisfied, | |
2537 | unless we're comparing properties, in which case only an | |
2538 | 'id' on the left-hand side (old property) is good | |
2539 | enough. */ | |
2540 | if (argno != -5) | |
2541 | pointers_compatible | |
2542 | = (objc_is_object_id (ltyp) || objc_is_object_id (rtyp)); | |
2543 | else | |
6bbb4715 | 2544 | pointers_compatible = objc_is_object_id (ltyp); |
ad312852 | 2545 | } |
499ea517 | 2546 | |
2547 | if (!pointers_compatible) | |
2548 | pointers_compatible = DERIVED_FROM_P (ltyp, rtyp); | |
2549 | ||
ad312852 | 2550 | if (!pointers_compatible && (argno == -3 || argno == -4)) |
499ea517 | 2551 | pointers_compatible = DERIVED_FROM_P (rtyp, ltyp); |
2552 | } | |
2553 | ||
2554 | /* If the pointers match modulo protocols, check for protocol conformance | |
2555 | mismatches. */ | |
2556 | if (pointers_compatible) | |
2557 | { | |
2558 | pointers_compatible = objc_compare_protocols (lcls, ltyp, rcls, rtyp, | |
2559 | argno != -3); | |
2560 | ||
2561 | if (!pointers_compatible && argno == -3) | |
2562 | pointers_compatible = objc_compare_protocols (rcls, rtyp, lcls, ltyp, | |
2563 | argno != -3); | |
2564 | } | |
2565 | ||
2566 | if (!pointers_compatible) | |
2567 | { | |
a198e083 | 2568 | /* The two pointers are not exactly compatible. Issue a warning, unless |
2569 | we are performing a silent comparison, in which case return 'false' | |
2570 | instead. */ | |
499ea517 | 2571 | /* NB: For the time being, we shall make our warnings look like their |
2572 | C counterparts. In the future, we may wish to make them more | |
2573 | ObjC-specific. */ | |
2574 | switch (argno) | |
02c2efaa | 2575 | { |
ad312852 | 2576 | case -5: |
a198e083 | 2577 | case -4: |
2578 | return false; | |
2579 | ||
499ea517 | 2580 | case -3: |
2581 | warning (0, "comparison of distinct Objective-C types lacks a cast"); | |
2582 | break; | |
2583 | ||
2584 | case -2: | |
2585 | warning (0, "initialization from distinct Objective-C type"); | |
2586 | break; | |
2587 | ||
2588 | case -1: | |
2589 | warning (0, "assignment from distinct Objective-C type"); | |
2590 | break; | |
2591 | ||
2592 | case 0: | |
2593 | warning (0, "distinct Objective-C type in return"); | |
2594 | break; | |
2595 | ||
2596 | default: | |
2597 | warning (0, "passing argument %d of %qE from distinct " | |
2598 | "Objective-C type", argno, callee); | |
2599 | break; | |
02c2efaa | 2600 | } |
c450c529 | 2601 | } |
e0ece38e | 2602 | |
499ea517 | 2603 | return true; |
2604 | } | |
2605 | ||
4abfc532 | 2606 | /* This routine is similar to objc_compare_types except that function-pointers are |
2607 | excluded. This is because, caller assumes that common types are of (id, Object*) | |
2608 | variety and calls objc_common_type to obtain a common type. There is no commonolty | |
2609 | between two function-pointers in this regard. */ | |
2610 | ||
6bbb4715 | 2611 | bool |
4abfc532 | 2612 | objc_have_common_type (tree ltyp, tree rtyp, int argno, tree callee) |
2613 | { | |
2614 | if (objc_compare_types (ltyp, rtyp, argno, callee)) | |
2615 | { | |
2616 | /* exclude function-pointer types. */ | |
2617 | do | |
2618 | { | |
2619 | ltyp = TREE_TYPE (ltyp); /* Remove indirections. */ | |
2620 | rtyp = TREE_TYPE (rtyp); | |
2621 | } | |
2622 | while (POINTER_TYPE_P (ltyp) && POINTER_TYPE_P (rtyp)); | |
2623 | return !(TREE_CODE (ltyp) == FUNCTION_TYPE && TREE_CODE (rtyp) == FUNCTION_TYPE); | |
2624 | } | |
2625 | return false; | |
2626 | } | |
2627 | ||
499ea517 | 2628 | #ifndef OBJCPLUS |
2629 | /* Determine if CHILD is derived from PARENT. The routine assumes that | |
2630 | both parameters are RECORD_TYPEs, and is non-reflexive. */ | |
2631 | ||
2632 | static bool | |
2633 | objc_derived_from_p (tree parent, tree child) | |
2634 | { | |
2635 | parent = TYPE_MAIN_VARIANT (parent); | |
2636 | ||
2637 | for (child = TYPE_MAIN_VARIANT (child); | |
2638 | TYPE_BINFO (child) && BINFO_N_BASE_BINFOS (TYPE_BINFO (child));) | |
02c2efaa | 2639 | { |
499ea517 | 2640 | child = TYPE_MAIN_VARIANT (BINFO_TYPE (BINFO_BASE_BINFO |
2641 | (TYPE_BINFO (child), | |
2642 | 0))); | |
2643 | ||
2644 | if (child == parent) | |
2645 | return true; | |
02c2efaa | 2646 | } |
fc304191 | 2647 | |
499ea517 | 2648 | return false; |
2649 | } | |
2650 | #endif | |
2651 | ||
267785bc | 2652 | tree |
499ea517 | 2653 | objc_build_component_ref (tree datum, tree component) |
2654 | { | |
2655 | /* If COMPONENT is NULL, the caller is referring to the anonymous | |
2656 | base class field. */ | |
2657 | if (!component) | |
2658 | { | |
2659 | tree base = TYPE_FIELDS (TREE_TYPE (datum)); | |
fc304191 | 2660 | |
499ea517 | 2661 | return build3 (COMPONENT_REF, TREE_TYPE (base), datum, base, NULL_TREE); |
2662 | } | |
fc304191 | 2663 | |
499ea517 | 2664 | /* The 'build_component_ref' routine has been removed from the C++ |
2665 | front-end, but 'finish_class_member_access_expr' seems to be | |
2666 | a worthy substitute. */ | |
2667 | #ifdef OBJCPLUS | |
717ecce9 | 2668 | return finish_class_member_access_expr (datum, component, false, |
2669 | tf_warning_or_error); | |
499ea517 | 2670 | #else |
e60a6f7b | 2671 | return build_component_ref (input_location, datum, component); |
499ea517 | 2672 | #endif |
2673 | } | |
fc304191 | 2674 | |
499ea517 | 2675 | /* Recursively copy inheritance information rooted at BINFO. To do this, |
2676 | we emulate the song and dance performed by cp/tree.c:copy_binfo(). */ | |
beed1ffc | 2677 | |
499ea517 | 2678 | static tree |
2679 | objc_copy_binfo (tree binfo) | |
2680 | { | |
2681 | tree btype = BINFO_TYPE (binfo); | |
2682 | tree binfo2 = make_tree_binfo (BINFO_N_BASE_BINFOS (binfo)); | |
2683 | tree base_binfo; | |
2684 | int ix; | |
fc304191 | 2685 | |
499ea517 | 2686 | BINFO_TYPE (binfo2) = btype; |
2687 | BINFO_OFFSET (binfo2) = BINFO_OFFSET (binfo); | |
2688 | BINFO_BASE_ACCESSES (binfo2) = BINFO_BASE_ACCESSES (binfo); | |
2689 | ||
2690 | /* Recursively copy base binfos of BINFO. */ | |
2691 | for (ix = 0; BINFO_BASE_ITERATE (binfo, ix, base_binfo); ix++) | |
fc304191 | 2692 | { |
499ea517 | 2693 | tree base_binfo2 = objc_copy_binfo (base_binfo); |
2694 | ||
2695 | BINFO_INHERITANCE_CHAIN (base_binfo2) = binfo2; | |
2696 | BINFO_BASE_APPEND (binfo2, base_binfo2); | |
2697 | } | |
2698 | ||
2699 | return binfo2; | |
2700 | } | |
2701 | ||
2702 | /* Record superclass information provided in BASETYPE for ObjC class REF. | |
2703 | This is loosely based on cp/decl.c:xref_basetypes(). */ | |
fc304191 | 2704 | |
499ea517 | 2705 | static void |
2706 | objc_xref_basetypes (tree ref, tree basetype) | |
2707 | { | |
d8d5c9af | 2708 | tree variant; |
499ea517 | 2709 | tree binfo = make_tree_binfo (basetype ? 1 : 0); |
499ea517 | 2710 | TYPE_BINFO (ref) = binfo; |
2711 | BINFO_OFFSET (binfo) = size_zero_node; | |
2712 | BINFO_TYPE (binfo) = ref; | |
c450c529 | 2713 | |
d8d5c9af | 2714 | gcc_assert (TYPE_MAIN_VARIANT (ref) == ref); |
2715 | for (variant = ref; variant; variant = TYPE_NEXT_VARIANT (variant)) | |
2716 | TYPE_BINFO (variant) = binfo; | |
2717 | ||
499ea517 | 2718 | if (basetype) |
2719 | { | |
2720 | tree base_binfo = objc_copy_binfo (TYPE_BINFO (basetype)); | |
c450c529 | 2721 | |
499ea517 | 2722 | BINFO_INHERITANCE_CHAIN (base_binfo) = binfo; |
f1f41a6c | 2723 | vec_alloc (BINFO_BASE_ACCESSES (binfo), 1); |
499ea517 | 2724 | BINFO_BASE_APPEND (binfo, base_binfo); |
2725 | BINFO_BASE_ACCESS_APPEND (binfo, access_public_node); | |
fc304191 | 2726 | } |
499ea517 | 2727 | } |
2728 | ||
c17b85ea | 2729 | /* Called from finish_decl. */ |
fc304191 | 2730 | |
c450c529 | 2731 | void |
39b8ddc6 | 2732 | objc_check_decl (tree decl) |
c450c529 | 2733 | { |
2734 | tree type = TREE_TYPE (decl); | |
2735 | ||
c17b85ea | 2736 | if (TREE_CODE (type) != RECORD_TYPE) |
2737 | return; | |
66eb9e7e | 2738 | if (OBJC_TYPE_NAME (type) && (type = objc_is_class_name (OBJC_TYPE_NAME (type)))) |
a608187f | 2739 | error ("statically allocated instance of Objective-C class %qE", |
2740 | type); | |
c450c529 | 2741 | } |
2742 | ||
e147d6aa | 2743 | void |
2744 | objc_check_global_decl (tree decl) | |
2745 | { | |
2746 | tree id = DECL_NAME (decl); | |
2747 | if (objc_is_class_name (id) && global_bindings_p()) | |
2748 | error ("redeclaration of Objective-C class %qs", IDENTIFIER_POINTER (id)); | |
2749 | } | |
2750 | ||
2f78a7ce | 2751 | /* Construct a PROTOCOLS-qualified variant of INTERFACE, where |
2752 | INTERFACE may either name an Objective-C class, or refer to the | |
2753 | special 'id' or 'Class' types. If INTERFACE is not a valid ObjC | |
2754 | type, just return it unchanged. This function is often called when | |
2755 | PROTOCOLS is NULL_TREE, in which case we simply look up the | |
2756 | appropriate INTERFACE. */ | |
fc304191 | 2757 | |
2758 | tree | |
13dcc150 | 2759 | objc_get_protocol_qualified_type (tree interface, tree protocols) |
c450c529 | 2760 | { |
6972a3bc | 2761 | /* If INTERFACE is not provided, default to 'id'. */ |
2762 | tree type = (interface ? objc_is_id (interface) : objc_object_type); | |
2763 | bool is_ptr = (type != NULL_TREE); | |
c450c529 | 2764 | |
6972a3bc | 2765 | if (!is_ptr) |
c450c529 | 2766 | { |
13dcc150 | 2767 | type = objc_is_class_name (interface); |
c450c529 | 2768 | |
13dcc150 | 2769 | if (type) |
b24ba8fa | 2770 | { |
2771 | /* If looking at a typedef, retrieve the precise type it | |
2772 | describes. */ | |
2773 | if (TREE_CODE (interface) == IDENTIFIER_NODE) | |
2774 | interface = identifier_global_value (interface); | |
2775 | ||
2776 | type = ((interface && TREE_CODE (interface) == TYPE_DECL | |
2777 | && DECL_ORIGINAL_TYPE (interface)) | |
2778 | ? DECL_ORIGINAL_TYPE (interface) | |
2779 | : xref_tag (RECORD_TYPE, type)); | |
2780 | } | |
13dcc150 | 2781 | else |
e5479368 | 2782 | { |
2783 | /* This case happens when we are given an 'interface' which | |
2784 | is not a valid class name. For example if a typedef was | |
2785 | used, and 'interface' really is the identifier of the | |
2786 | typedef, but when you resolve it you don't get an | |
2787 | Objective-C class, but something else, such as 'int'. | |
2788 | This is an error; protocols make no sense unless you use | |
2789 | them with Objective-C objects. */ | |
2790 | error_at (input_location, "only Objective-C object types can be qualified with a protocol"); | |
2791 | ||
2792 | /* Try to recover. Ignore the invalid class name, and treat | |
2793 | the object as an 'id' to silence further warnings about | |
2794 | the class. */ | |
2795 | type = objc_object_type; | |
2796 | is_ptr = true; | |
2797 | } | |
13dcc150 | 2798 | } |
e0ece38e | 2799 | |
c450c529 | 2800 | if (protocols) |
2801 | { | |
1561d3cd | 2802 | type = build_variant_type_copy (type); |
13dcc150 | 2803 | |
6972a3bc | 2804 | /* For pointers (i.e., 'id' or 'Class'), attach the protocol(s) |
2805 | to the pointee. */ | |
2806 | if (is_ptr) | |
2807 | { | |
6753bca0 | 2808 | tree orig_pointee_type = TREE_TYPE (type); |
2809 | TREE_TYPE (type) = build_variant_type_copy (orig_pointee_type); | |
2810 | ||
2811 | /* Set up the canonical type information. */ | |
6bbb4715 | 2812 | TYPE_CANONICAL (type) |
6753bca0 | 2813 | = TYPE_CANONICAL (TYPE_POINTER_TO (orig_pointee_type)); |
2814 | ||
6972a3bc | 2815 | TYPE_POINTER_TO (TREE_TYPE (type)) = type; |
2816 | type = TREE_TYPE (type); | |
2817 | } | |
2818 | ||
2819 | /* Look up protocols and install in lang specific list. */ | |
2820 | DUP_TYPE_OBJC_INFO (type, TYPE_MAIN_VARIANT (type)); | |
89e83a91 | 2821 | TYPE_OBJC_PROTOCOL_LIST (type) = lookup_and_install_protocols |
2822 | (protocols, /* definition_required */ false); | |
6972a3bc | 2823 | |
2824 | /* For RECORD_TYPEs, point to the @interface; for 'id' and 'Class', | |
2825 | return the pointer to the new pointee variant. */ | |
2826 | if (is_ptr) | |
2827 | type = TYPE_POINTER_TO (type); | |
2828 | else | |
2829 | TYPE_OBJC_INTERFACE (type) | |
2830 | = TYPE_OBJC_INTERFACE (TYPE_MAIN_VARIANT (type)); | |
c450c529 | 2831 | } |
13dcc150 | 2832 | |
c450c529 | 2833 | return type; |
2834 | } | |
2835 | ||
b11c0115 | 2836 | /* Check for circular dependencies in protocols. The arguments are |
2837 | PROTO, the protocol to check, and LIST, a list of protocol it | |
2838 | conforms to. */ | |
2839 | ||
39b8ddc6 | 2840 | static void |
2841 | check_protocol_recursively (tree proto, tree list) | |
b11c0115 | 2842 | { |
2843 | tree p; | |
2844 | ||
2845 | for (p = list; p; p = TREE_CHAIN (p)) | |
2846 | { | |
2847 | tree pp = TREE_VALUE (p); | |
2848 | ||
2849 | if (TREE_CODE (pp) == IDENTIFIER_NODE) | |
89e83a91 | 2850 | pp = lookup_protocol (pp, /* warn if deprecated */ false, |
2851 | /* definition_required */ false); | |
b11c0115 | 2852 | |
2853 | if (pp == proto) | |
c05be867 | 2854 | fatal_error (input_location, "protocol %qE has circular dependency", |
a608187f | 2855 | PROTOCOL_NAME (pp)); |
b11c0115 | 2856 | if (pp) |
2857 | check_protocol_recursively (proto, PROTOCOL_LIST (pp)); | |
2858 | } | |
2859 | } | |
2860 | ||
c213e196 | 2861 | /* Look up PROTOCOLS, and return a list of those that are found. If |
2862 | none are found, return NULL. Note that this function will emit a | |
89e83a91 | 2863 | warning if a protocol is found and is deprecated. If |
2864 | 'definition_required', then warn if the protocol is found but is | |
2865 | not defined (ie, if we only saw a forward-declaration of the | |
2866 | protocol (as in "@protocol NSObject;") not a real definition with | |
2867 | the list of methods). */ | |
c450c529 | 2868 | static tree |
89e83a91 | 2869 | lookup_and_install_protocols (tree protocols, bool definition_required) |
fc304191 | 2870 | { |
c450c529 | 2871 | tree proto; |
c17b85ea | 2872 | tree return_value = NULL_TREE; |
c450c529 | 2873 | |
e1f293c0 | 2874 | if (protocols == error_mark_node) |
2875 | return NULL; | |
2876 | ||
c450c529 | 2877 | for (proto = protocols; proto; proto = TREE_CHAIN (proto)) |
2878 | { | |
2879 | tree ident = TREE_VALUE (proto); | |
89e83a91 | 2880 | tree p = lookup_protocol (ident, /* warn_if_deprecated */ true, |
2881 | definition_required); | |
c450c529 | 2882 | |
77874a3c | 2883 | if (p) |
c17b85ea | 2884 | return_value = chainon (return_value, |
2885 | build_tree_list (NULL_TREE, p)); | |
77874a3c | 2886 | else if (ident != error_mark_node) |
a608187f | 2887 | error ("cannot find protocol declaration for %qE", |
2888 | ident); | |
c450c529 | 2889 | } |
e0ece38e | 2890 | |
c450c529 | 2891 | return return_value; |
fc304191 | 2892 | } |
2893 | ||
4d4b71d3 | 2894 | static void |
267785bc | 2895 | build_common_objc_exception_stuff (void) |
13dcc150 | 2896 | { |
267785bc | 2897 | tree noreturn_list, nothrow_list, temp_type; |
13dcc150 | 2898 | |
267785bc | 2899 | noreturn_list = tree_cons (get_identifier ("noreturn"), NULL, NULL); |
2900 | nothrow_list = tree_cons (get_identifier ("nothrow"), NULL, NULL); | |
13dcc150 | 2901 | |
267785bc | 2902 | /* void objc_exception_throw(id) __attribute__((noreturn)); */ |
2903 | /* void objc_sync_enter(id); */ | |
2904 | /* void objc_sync_exit(id); */ | |
2905 | temp_type = build_function_type_list (void_type_node, | |
2906 | objc_object_type, | |
2907 | NULL_TREE); | |
2908 | objc_exception_throw_decl | |
2909 | = add_builtin_function (TAG_EXCEPTIONTHROW, temp_type, 0, NOT_BUILT_IN, NULL, | |
2910 | noreturn_list); | |
2911 | /* Make sure that objc_exception_throw (id) claims that it may throw an | |
2912 | exception. */ | |
2913 | TREE_NOTHROW (objc_exception_throw_decl) = 0; | |
13dcc150 | 2914 | |
267785bc | 2915 | objc_sync_enter_decl |
2916 | = add_builtin_function (TAG_SYNCENTER, temp_type, 0, NOT_BUILT_IN, | |
2917 | NULL, nothrow_list); | |
13dcc150 | 2918 | |
267785bc | 2919 | objc_sync_exit_decl |
2920 | = add_builtin_function (TAG_SYNCEXIT, temp_type, 0, NOT_BUILT_IN, | |
2921 | NULL, nothrow_list); | |
4d4b71d3 | 2922 | } |
2923 | ||
e0ece38e | 2924 | /* Purpose: "play" parser, creating/installing representations |
c450c529 | 2925 | of the declarations that are required by Objective-C. |
2926 | ||
e0ece38e | 2927 | Model: |
c450c529 | 2928 | |
39b8ddc6 | 2929 | type_spec--------->sc_spec |
2930 | (tree_list) (tree_list) | |
2931 | | | | |
2932 | | | | |
2933 | identifier_node identifier_node */ | |
c450c529 | 2934 | |
fc304191 | 2935 | static void |
39b8ddc6 | 2936 | synth_module_prologue (void) |
fc304191 | 2937 | { |
13dcc150 | 2938 | tree type; |
2939 | enum debug_info_type save_write_symbols = write_symbols; | |
2940 | const struct gcc_debug_hooks *const save_hooks = debug_hooks; | |
2941 | ||
2942 | /* Suppress outputting debug symbols, because | |
08cc44e7 | 2943 | dbxout_init hasn't been called yet. */ |
13dcc150 | 2944 | write_symbols = NO_DEBUG; |
2945 | debug_hooks = &do_nothing_debug_hooks; | |
2946 | ||
2947 | #ifdef OBJCPLUS | |
2948 | push_lang_context (lang_name_c); /* extern "C" */ | |
2949 | #endif | |
2950 | ||
2951 | /* The following are also defined in <objc/objc.h> and friends. */ | |
fc304191 | 2952 | |
fc304191 | 2953 | objc_object_id = get_identifier (TAG_OBJECT); |
13dcc150 | 2954 | objc_class_id = get_identifier (TAG_CLASS); |
fc304191 | 2955 | |
2956 | objc_object_reference = xref_tag (RECORD_TYPE, objc_object_id); | |
13dcc150 | 2957 | objc_class_reference = xref_tag (RECORD_TYPE, objc_class_id); |
6db57367 | 2958 | |
13dcc150 | 2959 | objc_object_type = build_pointer_type (objc_object_reference); |
2960 | objc_class_type = build_pointer_type (objc_class_reference); | |
fc304191 | 2961 | |
13dcc150 | 2962 | objc_object_name = get_identifier (OBJECT_TYPEDEF_NAME); |
2963 | objc_class_name = get_identifier (CLASS_TYPEDEF_NAME); | |
fc304191 | 2964 | |
13dcc150 | 2965 | /* Declare the 'id' and 'Class' typedefs. */ |
e60a6f7b | 2966 | type = lang_hooks.decls.pushdecl (build_decl (input_location, |
2967 | TYPE_DECL, | |
13dcc150 | 2968 | objc_object_name, |
2969 | objc_object_type)); | |
7cb6f926 | 2970 | TREE_NO_WARNING (type) = 1; |
267785bc | 2971 | |
e60a6f7b | 2972 | type = lang_hooks.decls.pushdecl (build_decl (input_location, |
2973 | TYPE_DECL, | |
13dcc150 | 2974 | objc_class_name, |
2975 | objc_class_type)); | |
7cb6f926 | 2976 | TREE_NO_WARNING (type) = 1; |
13dcc150 | 2977 | |
2978 | /* Forward-declare '@interface Protocol'. */ | |
13dcc150 | 2979 | type = get_identifier (PROTOCOL_OBJECT_CLASS_NAME); |
29d7200d | 2980 | objc_declare_class (type); |
267785bc | 2981 | objc_protocol_type = build_pointer_type (xref_tag (RECORD_TYPE, type)); |
fc304191 | 2982 | |
01a43715 | 2983 | /* Declare receiver type used for dispatching messages to 'super'. */ |
c17b85ea | 2984 | /* `struct objc_super *' */ |
e5876878 | 2985 | objc_super_type = build_pointer_type (xref_tag (RECORD_TYPE, |
2986 | get_identifier (TAG_SUPER))); | |
c450c529 | 2987 | |
0ced0389 | 2988 | /* Declare pointers to method and ivar lists. */ |
2989 | objc_method_list_ptr = build_pointer_type | |
2990 | (xref_tag (RECORD_TYPE, | |
2991 | get_identifier (UTAG_METHOD_LIST))); | |
2992 | objc_method_proto_list_ptr | |
2993 | = build_pointer_type (xref_tag (RECORD_TYPE, | |
2994 | get_identifier (UTAG_METHOD_PROTOTYPE_LIST))); | |
2995 | objc_ivar_list_ptr = build_pointer_type | |
2996 | (xref_tag (RECORD_TYPE, | |
2997 | get_identifier (UTAG_IVAR_LIST))); | |
2998 | ||
267785bc | 2999 | build_common_objc_exception_stuff (); |
fc304191 | 3000 | |
267785bc | 3001 | /* Set-up runtime-specific templates, message and exception stuff. */ |
3002 | (*runtime.initialize) (); | |
13dcc150 | 3003 | |
7fd68cee | 3004 | /* Declare objc_getProperty, object_setProperty and other property |
3005 | accessor helpers. */ | |
267785bc | 3006 | build_common_objc_property_accessor_helpers (); |
c450c529 | 3007 | |
c450c529 | 3008 | /* Forward declare constant_string_id and constant_string_type. */ |
4411d0ab | 3009 | if (!constant_string_class_name) |
267785bc | 3010 | constant_string_class_name = runtime.default_constant_string_class_name; |
4411d0ab | 3011 | constant_string_id = get_identifier (constant_string_class_name); |
29d7200d | 3012 | objc_declare_class (constant_string_id); |
c17b85ea | 3013 | |
3014 | /* Pre-build the following entities - for speed/convenience. */ | |
3015 | self_id = get_identifier ("self"); | |
3016 | ucmd_id = get_identifier ("_cmd"); | |
13dcc150 | 3017 | |
0a65c3bb | 3018 | /* Declare struct _objc_fast_enumeration_state { ... }; */ |
3019 | build_fast_enumeration_state_template (); | |
6bbb4715 | 3020 | |
0a65c3bb | 3021 | /* void objc_enumeration_mutation (id) */ |
820ecd67 | 3022 | type = build_function_type_list (void_type_node, |
3023 | objc_object_type, NULL_TREE); | |
6bbb4715 | 3024 | objc_enumeration_mutation_decl |
3025 | = add_builtin_function (TAG_ENUMERATION_MUTATION, type, 0, NOT_BUILT_IN, | |
0a65c3bb | 3026 | NULL, NULL_TREE); |
3027 | TREE_NOTHROW (objc_enumeration_mutation_decl) = 0; | |
3028 | ||
13dcc150 | 3029 | #ifdef OBJCPLUS |
3030 | pop_lang_context (); | |
3031 | #endif | |
3032 | ||
3033 | write_symbols = save_write_symbols; | |
3034 | debug_hooks = save_hooks; | |
fc304191 | 3035 | } |
3036 | ||
267785bc | 3037 | /* --- const strings --- */ |
3038 | ||
c17b85ea | 3039 | /* Ensure that the ivar list for NSConstantString/NXConstantString |
3040 | (or whatever was specified via `-fconstant-string-class') | |
3041 | contains fields at least as large as the following three, so that | |
3042 | the runtime can stomp on them with confidence: | |
fd46afbf | 3043 | |
39b8ddc6 | 3044 | struct STRING_OBJECT_CLASS_NAME |
fd46afbf | 3045 | { |
3046 | Object isa; | |
3047 | char *cString; | |
3048 | unsigned int length; | |
3049 | }; */ | |
3050 | ||
c17b85ea | 3051 | static int |
3052 | check_string_class_template (void) | |
fd46afbf | 3053 | { |
0616a948 | 3054 | tree field_decl = objc_get_class_ivars (constant_string_id); |
fd46afbf | 3055 | |
c17b85ea | 3056 | #define AT_LEAST_AS_LARGE_AS(F, T) \ |
3057 | (F && TREE_CODE (F) == FIELD_DECL \ | |
f9ae6f95 | 3058 | && (TREE_INT_CST_LOW (TYPE_SIZE (TREE_TYPE (F))) \ |
3059 | >= TREE_INT_CST_LOW (TYPE_SIZE (T)))) | |
fd46afbf | 3060 | |
c17b85ea | 3061 | if (!AT_LEAST_AS_LARGE_AS (field_decl, ptr_type_node)) |
3062 | return 0; | |
fd46afbf | 3063 | |
1767a056 | 3064 | field_decl = DECL_CHAIN (field_decl); |
c17b85ea | 3065 | if (!AT_LEAST_AS_LARGE_AS (field_decl, ptr_type_node)) |
3066 | return 0; | |
3067 | ||
1767a056 | 3068 | field_decl = DECL_CHAIN (field_decl); |
c17b85ea | 3069 | return AT_LEAST_AS_LARGE_AS (field_decl, unsigned_type_node); |
fd46afbf | 3070 | |
c17b85ea | 3071 | #undef AT_LEAST_AS_LARGE_AS |
fd46afbf | 3072 | } |
3073 | ||
c17b85ea | 3074 | /* Avoid calling `check_string_class_template ()' more than once. */ |
3075 | static GTY(()) int string_layout_checked; | |
3076 | ||
0616a948 | 3077 | /* Construct an internal string layout to be used as a template for |
3078 | creating NSConstantString/NXConstantString instances. */ | |
3079 | ||
3080 | static tree | |
3081 | objc_build_internal_const_str_type (void) | |
3082 | { | |
3083 | tree type = (*lang_hooks.types.make_type) (RECORD_TYPE); | |
e60a6f7b | 3084 | tree fields = build_decl (input_location, |
3085 | FIELD_DECL, NULL_TREE, ptr_type_node); | |
3086 | tree field = build_decl (input_location, | |
3087 | FIELD_DECL, NULL_TREE, ptr_type_node); | |
0616a948 | 3088 | |
1767a056 | 3089 | DECL_CHAIN (field) = fields; fields = field; |
e60a6f7b | 3090 | field = build_decl (input_location, |
3091 | FIELD_DECL, NULL_TREE, unsigned_type_node); | |
1767a056 | 3092 | DECL_CHAIN (field) = fields; fields = field; |
0616a948 | 3093 | /* NB: The finish_builtin_struct() routine expects FIELD_DECLs in |
3094 | reverse order! */ | |
3095 | finish_builtin_struct (type, "__builtin_ObjCString", | |
3096 | fields, NULL_TREE); | |
3097 | ||
3098 | return type; | |
3099 | } | |
3100 | ||
c450c529 | 3101 | /* Custom build_string which sets TREE_TYPE! */ |
3102 | ||
267785bc | 3103 | tree |
39b8ddc6 | 3104 | my_build_string (int len, const char *str) |
fc304191 | 3105 | { |
070236f0 | 3106 | return fix_string_type (build_string (len, str)); |
c450c529 | 3107 | } |
3108 | ||
f14c8207 | 3109 | /* Build a string with contents STR and length LEN and convert it to a |
3110 | pointer. */ | |
3111 | ||
267785bc | 3112 | tree |
f14c8207 | 3113 | my_build_string_pointer (int len, const char *str) |
3114 | { | |
3115 | tree string = my_build_string (len, str); | |
3116 | tree ptrtype = build_pointer_type (TREE_TYPE (TREE_TYPE (string))); | |
3117 | return build1 (ADDR_EXPR, ptrtype, string); | |
3118 | } | |
13dcc150 | 3119 | |
2ef51f0e | 3120 | hashval_t |
3121 | objc_string_hasher::hash (string_descriptor *ptr) | |
13dcc150 | 3122 | { |
2ef51f0e | 3123 | const_tree const str = ptr->literal; |
13dcc150 | 3124 | const unsigned char *p = (const unsigned char *) TREE_STRING_POINTER (str); |
3125 | int i, len = TREE_STRING_LENGTH (str); | |
3126 | hashval_t h = len; | |
3127 | ||
3128 | for (i = 0; i < len; i++) | |
3129 | h = ((h * 613) + p[i]); | |
3130 | ||
3131 | return h; | |
3132 | } | |
3133 | ||
2ef51f0e | 3134 | bool |
3135 | objc_string_hasher::equal (string_descriptor *ptr1, string_descriptor *ptr2) | |
13dcc150 | 3136 | { |
2ef51f0e | 3137 | const_tree const str1 = ptr1->literal; |
3138 | const_tree const str2 = ptr2->literal; | |
13dcc150 | 3139 | int len1 = TREE_STRING_LENGTH (str1); |
3140 | ||
3141 | return (len1 == TREE_STRING_LENGTH (str2) | |
3142 | && !memcmp (TREE_STRING_POINTER (str1), TREE_STRING_POINTER (str2), | |
3143 | len1)); | |
3144 | } | |
3145 | ||
c17b85ea | 3146 | /* Given a chain of STRING_CST's, build a static instance of |
3147 | NXConstantString which points at the concatenation of those | |
3148 | strings. We place the string object in the __string_objects | |
3149 | section of the __OBJC segment. The Objective-C runtime will | |
3150 | initialize the isa pointers of the string objects to point at the | |
3151 | NXConstantString class object. */ | |
c450c529 | 3152 | |
3153 | tree | |
66eb9e7e | 3154 | objc_build_string_object (tree string) |
c450c529 | 3155 | { |
d4238e8b | 3156 | tree constant_string_class; |
c450c529 | 3157 | int length; |
267785bc | 3158 | tree addr; |
13dcc150 | 3159 | struct string_descriptor *desc, key; |
c450c529 | 3160 | |
8a8f7a54 | 3161 | /* We should be passed a STRING_CST. */ |
3162 | gcc_checking_assert (TREE_CODE (string) == STRING_CST); | |
c450c529 | 3163 | length = TREE_STRING_LENGTH (string) - 1; |
3164 | ||
6bbb4715 | 3165 | /* The target may have different ideas on how to construct an ObjC string |
3166 | literal. On Darwin (Mac OS X), for example, we may wish to obtain a | |
d4238e8b | 3167 | constant CFString reference instead. |
3168 | At present, this is only supported for the NeXT runtime. */ | |
6bbb4715 | 3169 | if (flag_next_runtime |
267785bc | 3170 | && targetcm.objc_construct_string_object) |
d4238e8b | 3171 | { |
1f6616ee | 3172 | tree constructor = (*targetcm.objc_construct_string_object) (string); |
d4238e8b | 3173 | if (constructor) |
3174 | return build1 (NOP_EXPR, objc_object_type, constructor); | |
3175 | } | |
3176 | ||
13dcc150 | 3177 | /* Check whether the string class being used actually exists and has the |
3178 | correct ivar layout. */ | |
c17b85ea | 3179 | if (!string_layout_checked) |
3180 | { | |
13dcc150 | 3181 | string_layout_checked = -1; |
3182 | constant_string_class = lookup_interface (constant_string_id); | |
0616a948 | 3183 | internal_const_str_type = objc_build_internal_const_str_type (); |
13dcc150 | 3184 | |
3185 | if (!constant_string_class | |
3186 | || !(constant_string_type | |
3187 | = CLASS_STATIC_TEMPLATE (constant_string_class))) | |
a608187f | 3188 | error ("cannot find interface declaration for %qE", |
3189 | constant_string_id); | |
13dcc150 | 3190 | /* The NSConstantString/NXConstantString ivar layout is now known. */ |
3191 | else if (!check_string_class_template ()) | |
a608187f | 3192 | error ("interface %qE does not have valid constant string layout", |
3193 | constant_string_id); | |
267785bc | 3194 | /* If the runtime can generate a literal reference to the string class, |
3195 | don't need to run a constructor. */ | |
3196 | else if (!(*runtime.setup_const_string_class_decl)()) | |
3197 | error ("cannot find reference tag for class %qE", constant_string_id); | |
13dcc150 | 3198 | else |
4d4b71d3 | 3199 | { |
13dcc150 | 3200 | string_layout_checked = 1; /* Success! */ |
3201 | add_class_reference (constant_string_id); | |
4d4b71d3 | 3202 | } |
4d4b71d3 | 3203 | } |
3204 | ||
13dcc150 | 3205 | if (string_layout_checked == -1) |
3206 | return error_mark_node; | |
6a9006c3 | 3207 | |
13dcc150 | 3208 | /* Perhaps we already constructed a constant string just like this one? */ |
3209 | key.literal = string; | |
2ef51f0e | 3210 | string_descriptor **loc = string_htab->find_slot (&key, INSERT); |
3211 | desc = *loc; | |
13dcc150 | 3212 | |
3213 | if (!desc) | |
e0ece38e | 3214 | { |
25a27413 | 3215 | *loc = desc = ggc_alloc<string_descriptor> (); |
13dcc150 | 3216 | desc->literal = string; |
6bbb4715 | 3217 | desc->constructor = |
267785bc | 3218 | (*runtime.build_const_string_constructor) (input_location, string, length); |
e0ece38e | 3219 | } |
3220 | ||
0616a948 | 3221 | addr = convert (build_pointer_type (constant_string_type), |
b6889cb0 | 3222 | build_unary_op (input_location, |
3223 | ADDR_EXPR, desc->constructor, 1)); | |
13dcc150 | 3224 | |
3225 | return addr; | |
51eb6608 | 3226 | } |
3227 | ||
6a9006c3 | 3228 | /* Build a static constant CONSTRUCTOR |
3229 | with type TYPE and elements ELTS. */ | |
3230 | ||
267785bc | 3231 | tree |
f1f41a6c | 3232 | objc_build_constructor (tree type, vec<constructor_elt, va_gc> *elts) |
6a9006c3 | 3233 | { |
4c6b0360 | 3234 | tree constructor = build_constructor (type, elts); |
1cd45b1e | 3235 | |
c450c529 | 3236 | TREE_CONSTANT (constructor) = 1; |
3237 | TREE_STATIC (constructor) = 1; | |
3238 | TREE_READONLY (constructor) = 1; | |
3239 | ||
c17b85ea | 3240 | #ifdef OBJCPLUS |
13dcc150 | 3241 | /* Adjust for impedance mismatch. We should figure out how to build |
3242 | CONSTRUCTORs that consistently please both the C and C++ gods. */ | |
f1f41a6c | 3243 | if (!(*elts)[0].index) |
b4d6f57b | 3244 | TREE_TYPE (constructor) = init_list_type_node; |
c17b85ea | 3245 | #endif |
13dcc150 | 3246 | |
6a9006c3 | 3247 | return constructor; |
fc304191 | 3248 | } |
848fa8f1 | 3249 | |
267785bc | 3250 | /* Return the DECL of the string IDENT in the SECTION. */ |
fc304191 | 3251 | |
267785bc | 3252 | tree |
3253 | get_objc_string_decl (tree ident, enum string_section section) | |
fc304191 | 3254 | { |
267785bc | 3255 | tree chain; |
fc304191 | 3256 | |
267785bc | 3257 | switch (section) |
c17b85ea | 3258 | { |
267785bc | 3259 | case class_names: |
3260 | chain = class_names_chain; | |
3261 | break; | |
3262 | case meth_var_names: | |
3263 | chain = meth_var_names_chain; | |
3264 | break; | |
3265 | case meth_var_types: | |
3266 | chain = meth_var_types_chain; | |
3267 | break; | |
3268 | case prop_names_attr: | |
3269 | chain = prop_names_attr_chain; | |
3270 | break; | |
3271 | default: | |
3272 | gcc_unreachable (); | |
c17b85ea | 3273 | } |
fc304191 | 3274 | |
267785bc | 3275 | for (; chain != 0; chain = TREE_CHAIN (chain)) |
3276 | if (TREE_VALUE (chain) == ident) | |
3277 | return (TREE_PURPOSE (chain)); | |
3278 | ||
3279 | /* We didn't find the entry. */ | |
3280 | return NULL_TREE; | |
fc304191 | 3281 | } |
3282 | ||
267785bc | 3283 | /* Create a class reference, but don't create a variable to reference |
3284 | it. */ | |
848fa8f1 | 3285 | |
267785bc | 3286 | void |
3287 | add_class_reference (tree ident) | |
fc304191 | 3288 | { |
267785bc | 3289 | tree chain; |
fc304191 | 3290 | |
267785bc | 3291 | if ((chain = cls_ref_chain)) |
d3b19b01 | 3292 | { |
267785bc | 3293 | tree tail; |
3294 | do | |
3295 | { | |
3296 | if (ident == TREE_VALUE (chain)) | |
3297 | return; | |
d3b19b01 | 3298 | |
267785bc | 3299 | tail = chain; |
3300 | chain = TREE_CHAIN (chain); | |
3301 | } | |
3302 | while (chain); | |
d3b19b01 | 3303 | |
267785bc | 3304 | /* Append to the end of the list */ |
3305 | TREE_CHAIN (tail) = tree_cons (NULL_TREE, ident, NULL_TREE); | |
3306 | } | |
3307 | else | |
3308 | cls_ref_chain = tree_cons (NULL_TREE, ident, NULL_TREE); | |
fc304191 | 3309 | } |
3310 | ||
267785bc | 3311 | /* Get a class reference, creating it if necessary. Also create the |
3312 | reference variable. */ | |
3313 | tree | |
3314 | objc_get_class_reference (tree ident) | |
fc304191 | 3315 | { |
267785bc | 3316 | tree orig_ident = (DECL_P (ident) |
3317 | ? DECL_NAME (ident) | |
3318 | : TYPE_P (ident) | |
3319 | ? OBJC_TYPE_NAME (ident) | |
3320 | : ident); | |
3321 | bool local_scope = false; | |
fc304191 | 3322 | |
267785bc | 3323 | #ifdef OBJCPLUS |
3324 | if (processing_template_decl) | |
3325 | /* Must wait until template instantiation time. */ | |
009ec0e5 | 3326 | return build_min_nt_loc (UNKNOWN_LOCATION, CLASS_REFERENCE_EXPR, ident); |
267785bc | 3327 | #endif |
fc304191 | 3328 | |
267785bc | 3329 | if (TREE_CODE (ident) == TYPE_DECL) |
3330 | ident = (DECL_ORIGINAL_TYPE (ident) | |
3331 | ? DECL_ORIGINAL_TYPE (ident) | |
3332 | : TREE_TYPE (ident)); | |
fc304191 | 3333 | |
267785bc | 3334 | #ifdef OBJCPLUS |
3335 | if (TYPE_P (ident) | |
3336 | && CP_TYPE_CONTEXT (ident) != global_namespace) | |
3337 | local_scope = true; | |
3338 | #endif | |
fc304191 | 3339 | |
267785bc | 3340 | if (local_scope || !(ident = objc_is_class_name (ident))) |
4c6b0360 | 3341 | { |
267785bc | 3342 | error ("%qE is not an Objective-C class name or alias", |
3343 | orig_ident); | |
3344 | return error_mark_node; | |
4c6b0360 | 3345 | } |
fc304191 | 3346 | |
267785bc | 3347 | return (*runtime.get_class_reference) (ident); |
3348 | } | |
fc304191 | 3349 | |
267785bc | 3350 | void |
3351 | objc_declare_alias (tree alias_ident, tree class_ident) | |
3352 | { | |
3353 | tree underlying_class; | |
fc304191 | 3354 | |
267785bc | 3355 | #ifdef OBJCPLUS |
3356 | if (current_namespace != global_namespace) { | |
3357 | error ("Objective-C declarations may only appear in global scope"); | |
3358 | } | |
3359 | #endif /* OBJCPLUS */ | |
fc304191 | 3360 | |
267785bc | 3361 | if (!(underlying_class = objc_is_class_name (class_ident))) |
3362 | warning (0, "cannot find class %qE", class_ident); | |
3363 | else if (objc_is_class_name (alias_ident)) | |
3364 | warning (0, "class %qE already exists", alias_ident); | |
3365 | else | |
6a9006c3 | 3366 | { |
267785bc | 3367 | /* Implement @compatibility_alias as a typedef. */ |
3368 | #ifdef OBJCPLUS | |
3369 | push_lang_context (lang_name_c); /* extern "C" */ | |
3370 | #endif | |
3371 | lang_hooks.decls.pushdecl (build_decl | |
3372 | (input_location, | |
3373 | TYPE_DECL, | |
3374 | alias_ident, | |
3375 | xref_tag (RECORD_TYPE, underlying_class))); | |
3376 | #ifdef OBJCPLUS | |
3377 | pop_lang_context (); | |
3378 | #endif | |
f41791cf | 3379 | objc_map_put (alias_name_map, alias_ident, underlying_class); |
6a9006c3 | 3380 | } |
fc304191 | 3381 | } |
3382 | ||
267785bc | 3383 | void |
29d7200d | 3384 | objc_declare_class (tree identifier) |
c17b85ea | 3385 | { |
267785bc | 3386 | #ifdef OBJCPLUS |
3387 | if (current_namespace != global_namespace) { | |
3388 | error ("Objective-C declarations may only appear in global scope"); | |
3389 | } | |
3390 | #endif /* OBJCPLUS */ | |
13dcc150 | 3391 | |
29d7200d | 3392 | if (! objc_is_class_name (identifier)) |
267785bc | 3393 | { |
29d7200d | 3394 | tree record = lookup_name (identifier), type = record; |
6bbb4715 | 3395 | |
29d7200d | 3396 | if (record) |
267785bc | 3397 | { |
29d7200d | 3398 | if (TREE_CODE (record) == TYPE_DECL) |
3399 | type = DECL_ORIGINAL_TYPE (record) | |
3400 | ? DECL_ORIGINAL_TYPE (record) | |
3401 | : TREE_TYPE (record); | |
6bbb4715 | 3402 | |
29d7200d | 3403 | if (!TYPE_HAS_OBJC_INFO (type) |
3404 | || !TYPE_OBJC_INTERFACE (type)) | |
267785bc | 3405 | { |
29d7200d | 3406 | error ("%qE redeclared as different kind of symbol", |
3407 | identifier); | |
3408 | error ("previous declaration of %q+D", | |
3409 | record); | |
267785bc | 3410 | } |
fc304191 | 3411 | } |
6bbb4715 | 3412 | |
29d7200d | 3413 | record = xref_tag (RECORD_TYPE, identifier); |
3414 | INIT_TYPE_OBJC_INFO (record); | |
3415 | /* In the case of a @class declaration, we store the ident in | |
3416 | the TYPE_OBJC_INTERFACE. If later an @interface is found, | |
3417 | we'll replace the ident with the interface. */ | |
3418 | TYPE_OBJC_INTERFACE (record) = identifier; | |
f41791cf | 3419 | objc_map_put (class_name_map, identifier, NULL_TREE); |
fc304191 | 3420 | } |
fc304191 | 3421 | } |
3422 | ||
267785bc | 3423 | tree |
3424 | objc_is_class_name (tree ident) | |
fc304191 | 3425 | { |
05ca272f | 3426 | if (ident && TREE_CODE (ident) == IDENTIFIER_NODE) |
3427 | { | |
3428 | tree t = identifier_global_value (ident); | |
3429 | if (t) | |
3430 | ident = t; | |
3431 | } | |
3432 | ||
267785bc | 3433 | while (ident && TREE_CODE (ident) == TYPE_DECL && DECL_ORIGINAL_TYPE (ident)) |
3434 | ident = OBJC_TYPE_NAME (DECL_ORIGINAL_TYPE (ident)); | |
13dcc150 | 3435 | |
267785bc | 3436 | if (ident && TREE_CODE (ident) == RECORD_TYPE) |
3437 | ident = OBJC_TYPE_NAME (ident); | |
13dcc150 | 3438 | #ifdef OBJCPLUS |
267785bc | 3439 | if (ident && TREE_CODE (ident) == TYPE_DECL) |
3440 | { | |
3441 | tree type = TREE_TYPE (ident); | |
3442 | if (type && TREE_CODE (type) == TEMPLATE_TYPE_PARM) | |
3443 | return NULL_TREE; | |
3444 | ident = DECL_NAME (ident); | |
3445 | } | |
13dcc150 | 3446 | #endif |
267785bc | 3447 | if (!ident || TREE_CODE (ident) != IDENTIFIER_NODE) |
3448 | return NULL_TREE; | |
fc304191 | 3449 | |
267785bc | 3450 | if (lookup_interface (ident)) |
3451 | return ident; | |
fc304191 | 3452 | |
f41791cf | 3453 | { |
3454 | tree target; | |
fc304191 | 3455 | |
f41791cf | 3456 | target = objc_map_get (class_name_map, ident); |
3457 | if (target != OBJC_MAP_NOT_FOUND) | |
3458 | return ident; | |
3459 | ||
3460 | target = objc_map_get (alias_name_map, ident); | |
3461 | if (target != OBJC_MAP_NOT_FOUND) | |
3462 | return target; | |
3463 | } | |
13dcc150 | 3464 | |
267785bc | 3465 | return 0; |
13dcc150 | 3466 | } |
3467 | ||
267785bc | 3468 | /* Check whether TYPE is either 'id' or 'Class'. */ |
fc304191 | 3469 | |
267785bc | 3470 | tree |
3471 | objc_is_id (tree type) | |
13dcc150 | 3472 | { |
05ca272f | 3473 | if (type && TREE_CODE (type) == IDENTIFIER_NODE) |
3474 | { | |
3475 | tree t = identifier_global_value (type); | |
3476 | if (t) | |
3477 | type = t; | |
3478 | } | |
fc304191 | 3479 | |
267785bc | 3480 | if (type && TREE_CODE (type) == TYPE_DECL) |
3481 | type = TREE_TYPE (type); | |
fc304191 | 3482 | |
267785bc | 3483 | /* NB: This function may be called before the ObjC front-end has |
3484 | been initialized, in which case OBJC_OBJECT_TYPE will (still) be NULL. */ | |
3485 | return (objc_object_type && type | |
3486 | && (IS_ID (type) || IS_CLASS (type) || IS_SUPER (type)) | |
3487 | ? type | |
3488 | : NULL_TREE); | |
13dcc150 | 3489 | } |
c450c529 | 3490 | |
267785bc | 3491 | /* Check whether TYPE is either 'id', 'Class', or a pointer to an ObjC |
3492 | class instance. This is needed by other parts of the compiler to | |
3493 | handle ObjC types gracefully. */ | |
13dcc150 | 3494 | |
267785bc | 3495 | tree |
3496 | objc_is_object_ptr (tree type) | |
13dcc150 | 3497 | { |
267785bc | 3498 | tree ret; |
13dcc150 | 3499 | |
267785bc | 3500 | type = TYPE_MAIN_VARIANT (type); |
3501 | if (!POINTER_TYPE_P (type)) | |
3502 | return 0; | |
13dcc150 | 3503 | |
267785bc | 3504 | ret = objc_is_id (type); |
3505 | if (!ret) | |
3506 | ret = objc_is_class_name (TREE_TYPE (type)); | |
13dcc150 | 3507 | |
267785bc | 3508 | return ret; |
fc304191 | 3509 | } |
e0ece38e | 3510 | |
267785bc | 3511 | static int |
3512 | objc_is_gcable_type (tree type, int or_strong_p) | |
51eb6608 | 3513 | { |
267785bc | 3514 | tree name; |
51eb6608 | 3515 | |
267785bc | 3516 | if (!TYPE_P (type)) |
3517 | return 0; | |
3518 | if (objc_is_id (TYPE_MAIN_VARIANT (type))) | |
3519 | return 1; | |
3520 | if (or_strong_p && lookup_attribute ("objc_gc", TYPE_ATTRIBUTES (type))) | |
3521 | return 1; | |
3522 | if (TREE_CODE (type) != POINTER_TYPE && TREE_CODE (type) != INDIRECT_REF) | |
3523 | return 0; | |
3524 | type = TREE_TYPE (type); | |
3525 | if (TREE_CODE (type) != RECORD_TYPE) | |
3526 | return 0; | |
3527 | name = TYPE_NAME (type); | |
3528 | return (objc_is_class_name (name) != NULL_TREE); | |
51eb6608 | 3529 | } |
3530 | ||
267785bc | 3531 | static tree |
3532 | objc_substitute_decl (tree expr, tree oldexpr, tree newexpr) | |
51eb6608 | 3533 | { |
267785bc | 3534 | if (expr == oldexpr) |
3535 | return newexpr; | |
51eb6608 | 3536 | |
267785bc | 3537 | switch (TREE_CODE (expr)) |
51eb6608 | 3538 | { |
267785bc | 3539 | case COMPONENT_REF: |
3540 | return objc_build_component_ref | |
3541 | (objc_substitute_decl (TREE_OPERAND (expr, 0), | |
3542 | oldexpr, | |
3543 | newexpr), | |
3544 | DECL_NAME (TREE_OPERAND (expr, 1))); | |
3545 | case ARRAY_REF: | |
3546 | return build_array_ref (input_location, | |
3547 | objc_substitute_decl (TREE_OPERAND (expr, 0), | |
3548 | oldexpr, | |
3549 | newexpr), | |
3550 | TREE_OPERAND (expr, 1)); | |
3551 | case INDIRECT_REF: | |
3552 | return build_indirect_ref (input_location, | |
3553 | objc_substitute_decl (TREE_OPERAND (expr, 0), | |
3554 | oldexpr, | |
3555 | newexpr), RO_ARROW); | |
3556 | default: | |
3557 | return expr; | |
51eb6608 | 3558 | } |
51eb6608 | 3559 | } |
3560 | ||
fc304191 | 3561 | static tree |
267785bc | 3562 | objc_build_ivar_assignment (tree outervar, tree lhs, tree rhs) |
fc304191 | 3563 | { |
267785bc | 3564 | tree func_params; |
3565 | /* The LHS parameter contains the expression 'outervar->memberspec'; | |
3566 | we need to transform it into '&((typeof(outervar) *) 0)->memberspec', | |
3567 | where memberspec may be arbitrarily complex (e.g., 'g->f.d[2].g[3]'). | |
3568 | */ | |
3569 | tree offs | |
3570 | = objc_substitute_decl | |
3571 | (lhs, outervar, convert (TREE_TYPE (outervar), integer_zero_node)); | |
3572 | tree func | |
3573 | = (flag_objc_direct_dispatch | |
3574 | ? objc_assign_ivar_fast_decl | |
3575 | : objc_assign_ivar_decl); | |
fc304191 | 3576 | |
267785bc | 3577 | offs = convert (integer_type_node, build_unary_op (input_location, |
3578 | ADDR_EXPR, offs, 0)); | |
3579 | offs = fold (offs); | |
3580 | func_params = tree_cons (NULL_TREE, | |
3581 | convert (objc_object_type, rhs), | |
3582 | tree_cons (NULL_TREE, convert (objc_object_type, outervar), | |
3583 | tree_cons (NULL_TREE, offs, | |
3584 | NULL_TREE))); | |
fc304191 | 3585 | |
267785bc | 3586 | return build_function_call (input_location, func, func_params); |
13dcc150 | 3587 | } |
fc304191 | 3588 | |
267785bc | 3589 | static tree |
3590 | objc_build_global_assignment (tree lhs, tree rhs) | |
13dcc150 | 3591 | { |
267785bc | 3592 | tree func_params = tree_cons (NULL_TREE, |
3593 | convert (objc_object_type, rhs), | |
3594 | tree_cons (NULL_TREE, convert (build_pointer_type (objc_object_type), | |
3595 | build_unary_op (input_location, ADDR_EXPR, lhs, 0)), | |
3596 | NULL_TREE)); | |
c450c529 | 3597 | |
6bbb4715 | 3598 | return build_function_call (input_location, |
267785bc | 3599 | objc_assign_global_decl, func_params); |
fc304191 | 3600 | } |
c450c529 | 3601 | |
c450c529 | 3602 | static tree |
267785bc | 3603 | objc_build_strong_cast_assignment (tree lhs, tree rhs) |
c450c529 | 3604 | { |
267785bc | 3605 | tree func_params = tree_cons (NULL_TREE, |
3606 | convert (objc_object_type, rhs), | |
3607 | tree_cons (NULL_TREE, convert (build_pointer_type (objc_object_type), | |
3608 | build_unary_op (input_location, ADDR_EXPR, lhs, 0)), | |
3609 | NULL_TREE)); | |
3610 | ||
267785bc | 3611 | return build_function_call (input_location, |
3612 | objc_assign_strong_cast_decl, func_params); | |
c450c529 | 3613 | } |
3614 | ||
267785bc | 3615 | static int |
3616 | objc_is_gcable_p (tree expr) | |
fc304191 | 3617 | { |
267785bc | 3618 | return (TREE_CODE (expr) == COMPONENT_REF |
3619 | ? objc_is_gcable_p (TREE_OPERAND (expr, 1)) | |
3620 | : TREE_CODE (expr) == ARRAY_REF | |
3621 | ? (objc_is_gcable_p (TREE_TYPE (expr)) | |
3622 | || objc_is_gcable_p (TREE_OPERAND (expr, 0))) | |
3623 | : TREE_CODE (expr) == ARRAY_TYPE | |
3624 | ? objc_is_gcable_p (TREE_TYPE (expr)) | |
3625 | : TYPE_P (expr) | |
3626 | ? objc_is_gcable_type (expr, 1) | |
3627 | : (objc_is_gcable_p (TREE_TYPE (expr)) | |
3628 | || (DECL_P (expr) | |
3629 | && lookup_attribute ("objc_gc", DECL_ATTRIBUTES (expr))))); | |
c4796e8b | 3630 | } |
3631 | ||
267785bc | 3632 | static int |
3633 | objc_is_ivar_reference_p (tree expr) | |
c4796e8b | 3634 | { |
267785bc | 3635 | return (TREE_CODE (expr) == ARRAY_REF |
3636 | ? objc_is_ivar_reference_p (TREE_OPERAND (expr, 0)) | |
3637 | : TREE_CODE (expr) == COMPONENT_REF | |
3638 | ? TREE_CODE (TREE_OPERAND (expr, 1)) == FIELD_DECL | |
3639 | : 0); | |
c4796e8b | 3640 | } |
3641 | ||
267785bc | 3642 | static int |
3643 | objc_is_global_reference_p (tree expr) | |
c4796e8b | 3644 | { |
267785bc | 3645 | return (TREE_CODE (expr) == INDIRECT_REF || TREE_CODE (expr) == PLUS_EXPR |
3646 | ? objc_is_global_reference_p (TREE_OPERAND (expr, 0)) | |
3647 | : DECL_P (expr) | |
3648 | ? (DECL_FILE_SCOPE_P (expr) || TREE_STATIC (expr)) | |
3649 | : 0); | |
3650 | } | |
c4796e8b | 3651 | |
267785bc | 3652 | tree |
3653 | objc_generate_write_barrier (tree lhs, enum tree_code modifycode, tree rhs) | |
3654 | { | |
3655 | tree result = NULL_TREE, outer; | |
3656 | int strong_cast_p = 0, outer_gc_p = 0, indirect_p = 0; | |
c4796e8b | 3657 | |
267785bc | 3658 | /* This function is currently only used with the next runtime with |
3659 | garbage collection enabled (-fobjc-gc). */ | |
3660 | gcc_assert (flag_next_runtime); | |
c4796e8b | 3661 | |
267785bc | 3662 | /* See if we have any lhs casts, and strip them out. NB: The lvalue casts |
3663 | will have been transformed to the form '*(type *)&expr'. */ | |
3664 | if (TREE_CODE (lhs) == INDIRECT_REF) | |
3665 | { | |
3666 | outer = TREE_OPERAND (lhs, 0); | |
c4796e8b | 3667 | |
267785bc | 3668 | while (!strong_cast_p |
3669 | && (CONVERT_EXPR_P (outer) | |
3670 | || TREE_CODE (outer) == NON_LVALUE_EXPR)) | |
146a801c | 3671 | { |
267785bc | 3672 | tree lhstype = TREE_TYPE (outer); |
39b8ddc6 | 3673 | |
267785bc | 3674 | /* Descend down the cast chain, and record the first objc_gc |
3675 | attribute found. */ | |
3676 | if (POINTER_TYPE_P (lhstype)) | |
3677 | { | |
3678 | tree attr | |
3679 | = lookup_attribute ("objc_gc", | |
3680 | TYPE_ATTRIBUTES (TREE_TYPE (lhstype))); | |
fc304191 | 3681 | |
267785bc | 3682 | if (attr) |
3683 | strong_cast_p = 1; | |
3684 | } | |
4c6b0360 | 3685 | |
267785bc | 3686 | outer = TREE_OPERAND (outer, 0); |
4c6b0360 | 3687 | } |
c450c529 | 3688 | } |
c450c529 | 3689 | |
267785bc | 3690 | /* If we have a __strong cast, it trumps all else. */ |
3691 | if (strong_cast_p) | |
146a801c | 3692 | { |
267785bc | 3693 | if (modifycode != NOP_EXPR) |
3694 | goto invalid_pointer_arithmetic; | |
c450c529 | 3695 | |
267785bc | 3696 | if (warn_assign_intercept) |
3697 | warning (0, "strong-cast assignment has been intercepted"); | |
146a801c | 3698 | |
267785bc | 3699 | result = objc_build_strong_cast_assignment (lhs, rhs); |
e0ece38e | 3700 | |
267785bc | 3701 | goto exit_point; |
146a801c | 3702 | } |
3703 | ||
267785bc | 3704 | /* the lhs must be of a suitable type, regardless of its underlying |
3705 | structure. */ | |
3706 | if (!objc_is_gcable_p (lhs)) | |
3707 | goto exit_point; | |
146a801c | 3708 | |
267785bc | 3709 | outer = lhs; |
146a801c | 3710 | |
267785bc | 3711 | while (outer |
3712 | && (TREE_CODE (outer) == COMPONENT_REF | |
3713 | || TREE_CODE (outer) == ARRAY_REF)) | |
3714 | outer = TREE_OPERAND (outer, 0); | |
c450c529 | 3715 | |
267785bc | 3716 | if (TREE_CODE (outer) == INDIRECT_REF) |
c450c529 | 3717 | { |
267785bc | 3718 | outer = TREE_OPERAND (outer, 0); |
3719 | indirect_p = 1; | |
c450c529 | 3720 | } |
3721 | ||
267785bc | 3722 | outer_gc_p = objc_is_gcable_p (outer); |
c450c529 | 3723 | |
267785bc | 3724 | /* Handle ivar assignments. */ |
3725 | if (objc_is_ivar_reference_p (lhs)) | |
3726 | { | |
3727 | /* if the struct to the left of the ivar is not an Objective-C object (__strong | |
3728 | doesn't cut it here), the best we can do here is suggest a cast. */ | |
3729 | if (!objc_is_gcable_type (TREE_TYPE (outer), 0)) | |
3730 | { | |
3731 | /* We may still be able to use the global write barrier... */ | |
3732 | if (!indirect_p && objc_is_global_reference_p (outer)) | |
3733 | goto global_reference; | |
c17b85ea | 3734 | |
267785bc | 3735 | suggest_cast: |
3736 | if (modifycode == NOP_EXPR) | |
3737 | { | |
3738 | if (warn_assign_intercept) | |
3739 | warning (0, "strong-cast may possibly be needed"); | |
3740 | } | |
c450c529 | 3741 | |
267785bc | 3742 | goto exit_point; |
3743 | } | |
c450c529 | 3744 | |
267785bc | 3745 | if (modifycode != NOP_EXPR) |
3746 | goto invalid_pointer_arithmetic; | |
fc304191 | 3747 | |
267785bc | 3748 | if (warn_assign_intercept) |
3749 | warning (0, "instance variable assignment has been intercepted"); | |
c450c529 | 3750 | |
267785bc | 3751 | result = objc_build_ivar_assignment (outer, lhs, rhs); |
fc304191 | 3752 | |
267785bc | 3753 | goto exit_point; |
3754 | } | |
3755 | ||
3756 | /* Likewise, intercept assignment to global/static variables if their type is | |
3757 | GC-marked. */ | |
3758 | if (objc_is_global_reference_p (outer)) | |
fc304191 | 3759 | { |
267785bc | 3760 | if (indirect_p) |
3761 | goto suggest_cast; | |
fc304191 | 3762 | |
267785bc | 3763 | global_reference: |
3764 | if (modifycode != NOP_EXPR) | |
3765 | { | |
3766 | invalid_pointer_arithmetic: | |
3767 | if (outer_gc_p) | |
3768 | warning (0, "pointer arithmetic for garbage-collected objects not allowed"); | |
fc304191 | 3769 | |
267785bc | 3770 | goto exit_point; |
3771 | } | |
3772 | ||
3773 | if (warn_assign_intercept) | |
3774 | warning (0, "global/static variable assignment has been intercepted"); | |
3775 | ||
3776 | result = objc_build_global_assignment (lhs, rhs); | |
fc304191 | 3777 | } |
267785bc | 3778 | |
3779 | /* In all other cases, fall back to the normal mechanism. */ | |
3780 | exit_point: | |
3781 | return result; | |
fc304191 | 3782 | } |
3783 | ||
f41791cf | 3784 | /* Implementation of the table mapping a class name (as an identifier) |
3785 | to a class node. The two public functions for it are | |
3786 | lookup_interface() and add_interface(). add_interface() is only | |
3787 | used in this file, so we can make it static. */ | |
c17b85ea | 3788 | |
f41791cf | 3789 | static GTY(()) objc_map_t interface_map; |
499ea517 | 3790 | |
f41791cf | 3791 | static void |
3792 | interface_hash_init (void) | |
267785bc | 3793 | { |
f41791cf | 3794 | interface_map = objc_map_alloc_ggc (200); |
267785bc | 3795 | } |
3796 | ||
f41791cf | 3797 | static tree |
3798 | add_interface (tree class_name, tree name) | |
267785bc | 3799 | { |
f41791cf | 3800 | /* Put interfaces on list in reverse order. */ |
3801 | TREE_CHAIN (class_name) = interface_chain; | |
3802 | interface_chain = class_name; | |
3803 | ||
3804 | /* Add it to the map. */ | |
3805 | objc_map_put (interface_map, name, class_name); | |
3806 | ||
3807 | return interface_chain; | |
267785bc | 3808 | } |
0ced0389 | 3809 | |
267785bc | 3810 | tree |
3811 | lookup_interface (tree ident) | |
3812 | { | |
499ea517 | 3813 | #ifdef OBJCPLUS |
267785bc | 3814 | if (ident && TREE_CODE (ident) == TYPE_DECL) |
3815 | ident = DECL_NAME (ident); | |
c17b85ea | 3816 | #endif |
c17b85ea | 3817 | |
267785bc | 3818 | if (ident == NULL_TREE || TREE_CODE (ident) != IDENTIFIER_NODE) |
3819 | return NULL_TREE; | |
c17b85ea | 3820 | |
267785bc | 3821 | { |
f41791cf | 3822 | tree interface = objc_map_get (interface_map, ident); |
fc304191 | 3823 | |
f41791cf | 3824 | if (interface == OBJC_MAP_NOT_FOUND) |
3825 | return NULL_TREE; | |
3826 | else | |
3827 | return interface; | |
267785bc | 3828 | } |
3829 | } | |
e0ece38e | 3830 | |
394dd737 | 3831 | |
3832 | ||
267785bc | 3833 | /* Implement @defs (<classname>) within struct bodies. */ |
fc304191 | 3834 | |
267785bc | 3835 | tree |
3836 | objc_get_class_ivars (tree class_name) | |
3837 | { | |
3838 | tree interface = lookup_interface (class_name); | |
fc304191 | 3839 | |
267785bc | 3840 | if (interface) |
3841 | return get_class_ivars (interface, true); | |
6b094e50 | 3842 | |
267785bc | 3843 | error ("cannot find interface declaration for %qE", |
3844 | class_name); | |
fc304191 | 3845 | |
267785bc | 3846 | return error_mark_node; |
c450c529 | 3847 | } |
3848 | ||
394dd737 | 3849 | |
3850 | /* Functions used by the hashtable for field duplicates in | |
3851 | objc_detect_field_duplicates(). Ideally, we'd use a standard | |
3852 | key-value dictionary hashtable , and store as keys the field names, | |
3853 | and as values the actual declarations (used to print nice error | |
3854 | messages with the locations). But, the hashtable we are using only | |
3855 | allows us to store keys in the hashtable, without values (it looks | |
3856 | more like a set). So, we store the DECLs, but define equality as | |
3857 | DECLs having the same name, and hash as the hash of the name. */ | |
d1455aa3 | 3858 | |
770ff93b | 3859 | struct decl_name_hash : nofree_ptr_hash <tree_node> |
d1455aa3 | 3860 | { |
9969c043 | 3861 | static inline hashval_t hash (const tree_node *); |
3862 | static inline bool equal (const tree_node *, const tree_node *); | |
d1455aa3 | 3863 | }; |
3864 | ||
3865 | inline hashval_t | |
9969c043 | 3866 | decl_name_hash::hash (const tree_node *q) |
394dd737 | 3867 | { |
394dd737 | 3868 | return (hashval_t) ((intptr_t)(DECL_NAME (q)) >> 3); |
3869 | } | |
3870 | ||
d1455aa3 | 3871 | inline bool |
9969c043 | 3872 | decl_name_hash::equal (const tree_node *a, const tree_node *b) |
394dd737 | 3873 | { |
394dd737 | 3874 | return DECL_NAME (a) == DECL_NAME (b); |
3875 | } | |
3876 | ||
267785bc | 3877 | /* Called when checking the variables in a struct. If we are not |
394dd737 | 3878 | doing the ivars list inside an @interface context, then return |
3879 | false. Else, perform the check for duplicate ivars, then return | |
3880 | true. The check for duplicates checks if an instance variable with | |
3881 | the same name exists in the class or in a superclass. If | |
3882 | 'check_superclasses_only' is set to true, then it is assumed that | |
3883 | checks for instance variables in the same class has already been | |
3884 | performed (this is the case for ObjC++) and only the instance | |
3885 | variables of superclasses are checked. */ | |
3886 | bool | |
3887 | objc_detect_field_duplicates (bool check_superclasses_only) | |
267785bc | 3888 | { |
6bbb4715 | 3889 | if (!objc_collecting_ivars || !objc_interface_context |
394dd737 | 3890 | || TREE_CODE (objc_interface_context) != CLASS_INTERFACE_TYPE) |
3891 | return false; | |
3892 | ||
3893 | /* We have two ways of doing this check: | |
6bbb4715 | 3894 | |
394dd737 | 3895 | "direct comparison": we iterate over the instance variables and |
3896 | compare them directly. This works great for small numbers of | |
3897 | instance variables (such as 10 or 20), which are extremely common. | |
3898 | But it will potentially take forever for the pathological case with | |
3899 | a huge number (eg, 10k) of instance variables. | |
6bbb4715 | 3900 | |
394dd737 | 3901 | "hashtable": we use a hashtable, which requires a single sweep |
3902 | through the list of instances variables. This is much slower for a | |
3903 | small number of variables, and we only use it for large numbers. | |
3904 | ||
3905 | To decide which one to use, we need to get an idea of how many | |
3906 | instance variables we have to compare. */ | |
3907 | { | |
3908 | unsigned int number_of_ivars_to_check = 0; | |
3909 | { | |
3910 | tree ivar; | |
3911 | for (ivar = CLASS_RAW_IVARS (objc_interface_context); | |
3912 | ivar; ivar = DECL_CHAIN (ivar)) | |
3913 | { | |
3914 | /* Ignore anonymous ivars. */ | |
3915 | if (DECL_NAME (ivar)) | |
3916 | number_of_ivars_to_check++; | |
3917 | } | |
3918 | } | |
267785bc | 3919 | |
394dd737 | 3920 | /* Exit if there is nothing to do. */ |
3921 | if (number_of_ivars_to_check == 0) | |
3922 | return true; | |
6bbb4715 | 3923 | |
394dd737 | 3924 | /* In case that there are only 1 or 2 instance variables to check, |
3925 | we always use direct comparison. If there are more, it is | |
3926 | worth iterating over the instance variables in the superclass | |
3927 | to count how many there are (note that this has the same cost | |
3928 | as checking 1 instance variable by direct comparison, which is | |
3929 | why we skip this check in the case of 1 or 2 ivars and just do | |
3930 | the direct comparison) and then decide if it worth using a | |
3931 | hashtable. */ | |
3932 | if (number_of_ivars_to_check > 2) | |
3933 | { | |
3934 | unsigned int number_of_superclass_ivars = 0; | |
3935 | { | |
3936 | tree interface; | |
3937 | for (interface = lookup_interface (CLASS_SUPER_NAME (objc_interface_context)); | |
3938 | interface; interface = lookup_interface (CLASS_SUPER_NAME (interface))) | |
3939 | { | |
3940 | tree ivar; | |
3941 | for (ivar = CLASS_RAW_IVARS (interface); | |
3942 | ivar; ivar = DECL_CHAIN (ivar)) | |
3943 | number_of_superclass_ivars++; | |
3944 | } | |
3945 | } | |
3946 | ||
3947 | /* We use a hashtable if we have over 10k comparisons. */ | |
6bbb4715 | 3948 | if (number_of_ivars_to_check * (number_of_superclass_ivars |
394dd737 | 3949 | + (number_of_ivars_to_check / 2)) |
3950 | > 10000) | |
3951 | { | |
3952 | /* First, build the hashtable by putting all the instance | |
3953 | variables of superclasses in it. */ | |
c1f445d2 | 3954 | hash_table<decl_name_hash> htab (37); |
394dd737 | 3955 | tree interface; |
3956 | for (interface = lookup_interface (CLASS_SUPER_NAME | |
3957 | (objc_interface_context)); | |
3958 | interface; interface = lookup_interface | |
3959 | (CLASS_SUPER_NAME (interface))) | |
3960 | { | |
3961 | tree ivar; | |
3962 | for (ivar = CLASS_RAW_IVARS (interface); ivar; | |
3963 | ivar = DECL_CHAIN (ivar)) | |
3964 | { | |
3965 | if (DECL_NAME (ivar) != NULL_TREE) | |
3966 | { | |
d1455aa3 | 3967 | tree_node **slot = htab.find_slot (ivar, INSERT); |
394dd737 | 3968 | /* Do not check for duplicate instance |
3969 | variables in superclasses. Errors have | |
3970 | already been generated. */ | |
3971 | *slot = ivar; | |
3972 | } | |
3973 | } | |
3974 | } | |
6bbb4715 | 3975 | |
394dd737 | 3976 | /* Now, we go through all the instance variables in the |
3977 | class, and check that they are not in the | |
3978 | hashtable. */ | |
3979 | if (check_superclasses_only) | |
3980 | { | |
3981 | tree ivar; | |
3982 | for (ivar = CLASS_RAW_IVARS (objc_interface_context); ivar; | |
3983 | ivar = DECL_CHAIN (ivar)) | |
3984 | { | |
3985 | if (DECL_NAME (ivar) != NULL_TREE) | |
3986 | { | |
d1455aa3 | 3987 | tree duplicate_ivar = htab.find (ivar); |
394dd737 | 3988 | if (duplicate_ivar != HTAB_EMPTY_ENTRY) |
3989 | { | |
3990 | error_at (DECL_SOURCE_LOCATION (ivar), | |
3991 | "duplicate instance variable %q+D", | |
3992 | ivar); | |
3993 | inform (DECL_SOURCE_LOCATION (duplicate_ivar), | |
3994 | "previous declaration of %q+D", | |
3995 | duplicate_ivar); | |
3996 | /* FIXME: Do we need the following ? */ | |
3997 | /* DECL_NAME (ivar) = NULL_TREE; */ | |
3998 | } | |
3999 | } | |
4000 | } | |
4001 | } | |
4002 | else | |
4003 | { | |
4004 | /* If we're checking for duplicates in the class as | |
4005 | well, we insert variables in the hashtable as we | |
4006 | check them, so if a duplicate follows, it will be | |
4007 | caught. */ | |
4008 | tree ivar; | |
4009 | for (ivar = CLASS_RAW_IVARS (objc_interface_context); ivar; | |
4010 | ivar = DECL_CHAIN (ivar)) | |
4011 | { | |
4012 | if (DECL_NAME (ivar) != NULL_TREE) | |
4013 | { | |
d1455aa3 | 4014 | tree_node **slot = htab.find_slot (ivar, INSERT); |
394dd737 | 4015 | if (*slot) |
4016 | { | |
4017 | tree duplicate_ivar = (tree)(*slot); | |
4018 | error_at (DECL_SOURCE_LOCATION (ivar), | |
4019 | "duplicate instance variable %q+D", | |
4020 | ivar); | |
4021 | inform (DECL_SOURCE_LOCATION (duplicate_ivar), | |
4022 | "previous declaration of %q+D", | |
4023 | duplicate_ivar); | |
4024 | /* FIXME: Do we need the following ? */ | |
4025 | /* DECL_NAME (ivar) = NULL_TREE; */ | |
4026 | } | |
4027 | *slot = ivar; | |
4028 | } | |
4029 | } | |
4030 | } | |
394dd737 | 4031 | return true; |
4032 | } | |
4033 | } | |
4034 | } | |
6bbb4715 | 4035 | |
394dd737 | 4036 | /* This is the "direct comparison" approach, which is used in most |
4037 | non-pathological cases. */ | |
4038 | { | |
4039 | /* Walk up to class hierarchy, starting with this class (this is | |
4040 | the external loop, because lookup_interface() is expensive, and | |
4041 | we want to do it few times). */ | |
4042 | tree interface = objc_interface_context; | |
4043 | ||
4044 | if (check_superclasses_only) | |
4045 | interface = lookup_interface (CLASS_SUPER_NAME (interface)); | |
6bbb4715 | 4046 | |
394dd737 | 4047 | for ( ; interface; interface = lookup_interface |
4048 | (CLASS_SUPER_NAME (interface))) | |
4049 | { | |
4050 | tree ivar_being_checked; | |
4051 | ||
4052 | for (ivar_being_checked = CLASS_RAW_IVARS (objc_interface_context); | |
4053 | ivar_being_checked; | |
4054 | ivar_being_checked = DECL_CHAIN (ivar_being_checked)) | |
4055 | { | |
4056 | tree decl; | |
6bbb4715 | 4057 | |
394dd737 | 4058 | /* Ignore anonymous ivars. */ |
4059 | if (DECL_NAME (ivar_being_checked) == NULL_TREE) | |
4060 | continue; | |
4061 | ||
4062 | /* Note how we stop when we find the ivar we are checking | |
4063 | (this can only happen in the main class, not | |
4064 | superclasses), to avoid comparing things twice | |
4065 | (otherwise, for each ivar, you'd compare A to B then B | |
4066 | to A, and get duplicated error messages). */ | |
4067 | for (decl = CLASS_RAW_IVARS (interface); | |
4068 | decl && decl != ivar_being_checked; | |
4069 | decl = DECL_CHAIN (decl)) | |
4070 | { | |
4071 | if (DECL_NAME (ivar_being_checked) == DECL_NAME (decl)) | |
4072 | { | |
4073 | error_at (DECL_SOURCE_LOCATION (ivar_being_checked), | |
4074 | "duplicate instance variable %q+D", | |
4075 | ivar_being_checked); | |
4076 | inform (DECL_SOURCE_LOCATION (decl), | |
4077 | "previous declaration of %q+D", | |
4078 | decl); | |
4079 | /* FIXME: Do we need the following ? */ | |
4080 | /* DECL_NAME (ivar_being_checked) = NULL_TREE; */ | |
4081 | } | |
4082 | } | |
4083 | } | |
4084 | } | |
4085 | } | |
4086 | return true; | |
267785bc | 4087 | } |
c450c529 | 4088 | |
267785bc | 4089 | /* Used by: build_private_template, continue_class, |
4090 | and for @defs constructs. */ | |
c4796e8b | 4091 | |
c450c529 | 4092 | static tree |
267785bc | 4093 | get_class_ivars (tree interface, bool inherited) |
c450c529 | 4094 | { |
267785bc | 4095 | tree ivar_chain = copy_list (CLASS_RAW_IVARS (interface)); |
4096 | ||
4097 | /* Both CLASS_RAW_IVARS and CLASS_IVARS contain a list of ivars declared | |
4098 | by the current class (i.e., they do not include super-class ivars). | |
4099 | However, the CLASS_IVARS list will be side-effected by a call to | |
4100 | finish_struct(), which will fill in field offsets. */ | |
4101 | if (!CLASS_IVARS (interface)) | |
4102 | CLASS_IVARS (interface) = ivar_chain; | |
4103 | ||
4104 | if (!inherited) | |
4105 | return ivar_chain; | |
4106 | ||
4107 | while (CLASS_SUPER_NAME (interface)) | |
c4796e8b | 4108 | { |
267785bc | 4109 | /* Prepend super-class ivars. */ |
4110 | interface = lookup_interface (CLASS_SUPER_NAME (interface)); | |
4111 | ivar_chain = chainon (copy_list (CLASS_RAW_IVARS (interface)), | |
4112 | ivar_chain); | |
c4796e8b | 4113 | } |
c450c529 | 4114 | |
267785bc | 4115 | return ivar_chain; |
4116 | } | |
4117 | ||
4118 | void | |
4119 | objc_maybe_warn_exceptions (location_t loc) | |
4120 | { | |
4121 | /* -fobjc-exceptions is required to enable Objective-C exceptions. | |
4122 | For example, on Darwin, ObjC exceptions require a sufficiently | |
4123 | recent version of the runtime, so the user must ask for them | |
4124 | explicitly. On other platforms, at the moment -fobjc-exceptions | |
4125 | triggers -fexceptions which again is required for exceptions to | |
4126 | work. */ | |
4127 | if (!flag_objc_exceptions) | |
c450c529 | 4128 | { |
267785bc | 4129 | /* Warn only once per compilation unit. */ |
4130 | static bool warned = false; | |
c450c529 | 4131 | |
267785bc | 4132 | if (!warned) |
4133 | { | |
4134 | error_at (loc, "%<-fobjc-exceptions%> is required to enable Objective-C exception syntax"); | |
4135 | warned = true; | |
4136 | } | |
fc304191 | 4137 | } |
267785bc | 4138 | } |
4139 | ||
4140 | static struct objc_try_context *cur_try_context; | |
c450c529 | 4141 | |
267785bc | 4142 | /* Called just after parsing the @try and its associated BODY. We now |
4143 | must prepare for the tricky bits -- handling the catches and finally. */ | |
c450c529 | 4144 | |
267785bc | 4145 | void |
4146 | objc_begin_try_stmt (location_t try_locus, tree body) | |
4147 | { | |
4148 | struct objc_try_context *c = XCNEW (struct objc_try_context); | |
4149 | c->outer = cur_try_context; | |
4150 | c->try_body = body; | |
4151 | c->try_locus = try_locus; | |
4152 | c->end_try_locus = input_location; | |
4153 | cur_try_context = c; | |
c450c529 | 4154 | |
267785bc | 4155 | /* Collect the list of local variables. We'll mark them as volatile |
4156 | at the end of compilation of this function to prevent them being | |
4157 | clobbered by setjmp/longjmp. */ | |
4158 | if (flag_objc_sjlj_exceptions) | |
4159 | objc_mark_locals_volatile (NULL); | |
c450c529 | 4160 | } |
4161 | ||
267785bc | 4162 | /* Called just after parsing "@catch (parm)". Open a binding level, |
4163 | enter DECL into the binding level, and initialize it. Leave the | |
4164 | binding level open while the body of the compound statement is | |
4165 | parsed. If DECL is NULL_TREE, then we are compiling "@catch(...)" | |
4166 | which we compile as "@catch(id tmp_variable)". */ | |
4167 | ||
c450c529 | 4168 | void |
267785bc | 4169 | objc_begin_catch_clause (tree decl) |
c450c529 | 4170 | { |
267785bc | 4171 | tree compound, type, t; |
4172 | bool ellipsis = false; | |
c17b85ea | 4173 | |
267785bc | 4174 | /* Begin a new scope that the entire catch clause will live in. */ |
4175 | compound = c_begin_compound_stmt (true); | |
c17b85ea | 4176 | |
267785bc | 4177 | /* Create the appropriate declaration for the argument. */ |
4178 | if (decl == error_mark_node) | |
4179 | type = error_mark_node; | |
4180 | else | |
4181 | { | |
4182 | if (decl == NULL_TREE) | |
4183 | { | |
4184 | /* If @catch(...) was specified, create a temporary variable of | |
4185 | type 'id' and use it. */ | |
4186 | decl = objc_create_temporary_var (objc_object_type, "__objc_generic_catch_var"); | |
4187 | DECL_SOURCE_LOCATION (decl) = input_location; | |
4188 | /* ... but allow the runtime to differentiate between ellipsis and the | |
4189 | case of @catch (id xyz). */ | |
4190 | ellipsis = true; | |
4191 | } | |
4192 | else | |
4193 | { | |
4194 | /* The parser passed in a PARM_DECL, but what we really want is a VAR_DECL. */ | |
4195 | decl = build_decl (input_location, | |
4196 | VAR_DECL, DECL_NAME (decl), TREE_TYPE (decl)); | |
4197 | } | |
4198 | lang_hooks.decls.pushdecl (decl); | |
c450c529 | 4199 | |
267785bc | 4200 | /* Mark the declaration as used so you never any warnings whether |
4201 | you use the exception argument or not. TODO: Implement a | |
4202 | -Wunused-exception-parameter flag, which would cause warnings | |
4203 | if exception parameter is not used. */ | |
4204 | TREE_USED (decl) = 1; | |
4205 | DECL_READ_P (decl) = 1; | |
c450c529 | 4206 | |
267785bc | 4207 | type = TREE_TYPE (decl); |
4208 | } | |
c450c529 | 4209 | |
267785bc | 4210 | /* Verify that the type of the catch is valid. It must be a pointer |
4211 | to an Objective-C class, or "id" (which is catch-all). */ | |
4212 | if (type == error_mark_node) | |
4213 | { | |
4214 | ;/* Just keep going. */ | |
4215 | } | |
4216 | else if (!objc_type_valid_for_messaging (type, false)) | |
4217 | { | |
4218 | error ("@catch parameter is not a known Objective-C class type"); | |
4219 | type = error_mark_node; | |
4220 | } | |
4221 | else if (TYPE_HAS_OBJC_INFO (TREE_TYPE (type)) | |
4222 | && TYPE_OBJC_PROTOCOL_LIST (TREE_TYPE (type))) | |
4223 | { | |
4224 | error ("@catch parameter can not be protocol-qualified"); | |
6bbb4715 | 4225 | type = error_mark_node; |
267785bc | 4226 | } |
4227 | else if (POINTER_TYPE_P (type) && objc_is_object_id (TREE_TYPE (type))) | |
4228 | /* @catch (id xyz) or @catch (...) but we note this for runtimes that | |
4229 | identify 'id'. */ | |
4230 | ; | |
4231 | else | |
4232 | { | |
4233 | /* If 'type' was built using typedefs, we need to get rid of | |
4234 | them and get a simple pointer to the class. */ | |
4235 | bool is_typedef = false; | |
4236 | tree x = TYPE_MAIN_VARIANT (type); | |
6bbb4715 | 4237 | |
267785bc | 4238 | /* Skip from the pointer to the pointee. */ |
4239 | if (TREE_CODE (x) == POINTER_TYPE) | |
4240 | x = TREE_TYPE (x); | |
6bbb4715 | 4241 | |
267785bc | 4242 | /* Traverse typedef aliases */ |
4243 | while (TREE_CODE (x) == RECORD_TYPE && OBJC_TYPE_NAME (x) | |
4244 | && TREE_CODE (OBJC_TYPE_NAME (x)) == TYPE_DECL | |
4245 | && DECL_ORIGINAL_TYPE (OBJC_TYPE_NAME (x))) | |
c450c529 | 4246 | { |
267785bc | 4247 | is_typedef = true; |
4248 | x = DECL_ORIGINAL_TYPE (OBJC_TYPE_NAME (x)); | |
4249 | } | |
6972a3bc | 4250 | |
267785bc | 4251 | /* If it was a typedef, build a pointer to the final, original |
4252 | class. */ | |
4253 | if (is_typedef) | |
4254 | type = build_pointer_type (x); | |
6972a3bc | 4255 | |
267785bc | 4256 | if (cur_try_context->catch_list) |
4257 | { | |
4258 | /* Examine previous @catch clauses and see if we've already | |
4259 | caught the type in question. */ | |
4260 | tree_stmt_iterator i = tsi_start (cur_try_context->catch_list); | |
4261 | for (; !tsi_end_p (i); tsi_next (&i)) | |
4262 | { | |
4263 | tree stmt = tsi_stmt (i); | |
4264 | t = CATCH_TYPES (stmt); | |
4265 | if (t == error_mark_node) | |
4266 | continue; | |
4267 | if (!t || DERIVED_FROM_P (TREE_TYPE (t), TREE_TYPE (type))) | |
6972a3bc | 4268 | { |
267785bc | 4269 | warning (0, "exception of type %<%T%> will be caught", |
4270 | TREE_TYPE (type)); | |
4271 | warning_at (EXPR_LOCATION (stmt), 0, " by earlier handler for %<%T%>", | |
4272 | TREE_TYPE (t ? t : objc_object_type)); | |
4273 | break; | |
6972a3bc | 4274 | } |
c17b85ea | 4275 | } |
c450c529 | 4276 | } |
4277 | } | |
fc304191 | 4278 | |
267785bc | 4279 | t = (*runtime.begin_catch) (&cur_try_context, type, decl, compound, ellipsis); |
4280 | add_stmt (t); | |
4281 | } | |
fc304191 | 4282 | |
267785bc | 4283 | /* Called just after parsing the closing brace of a @catch clause. Close |
4284 | the open binding level, and record a CATCH_EXPR for it. */ | |
c17b85ea | 4285 | |
267785bc | 4286 | void |
4287 | objc_finish_catch_clause (void) | |
4288 | { | |
4289 | tree c = cur_try_context->current_catch; | |
4290 | cur_try_context->current_catch = NULL; | |
4291 | cur_try_context->end_catch_locus = input_location; | |
c17b85ea | 4292 | |
267785bc | 4293 | CATCH_BODY (c) = c_end_compound_stmt (input_location, CATCH_BODY (c), 1); |
fc304191 | 4294 | |
267785bc | 4295 | (*runtime.finish_catch) (&cur_try_context, c); |
4296 | } | |
fc304191 | 4297 | |
267785bc | 4298 | /* Called after parsing a @finally clause and its associated BODY. |
4299 | Record the body for later placement. */ | |
fc304191 | 4300 | |
267785bc | 4301 | void |
4302 | objc_build_finally_clause (location_t finally_locus, tree body) | |
4303 | { | |
4304 | cur_try_context->finally_body = body; | |
4305 | cur_try_context->finally_locus = finally_locus; | |
4306 | cur_try_context->end_finally_locus = input_location; | |
260fbc4e | 4307 | } |
4308 | ||
267785bc | 4309 | /* Called to finalize a @try construct. */ |
13dcc150 | 4310 | |
4311 | tree | |
267785bc | 4312 | objc_finish_try_stmt (void) |
13dcc150 | 4313 | { |
267785bc | 4314 | struct objc_try_context *c = cur_try_context; |
4315 | tree stmt; | |
13dcc150 | 4316 | |
267785bc | 4317 | if (c->catch_list == NULL && c->finally_body == NULL) |
4318 | error ("%<@try%> without %<@catch%> or %<@finally%>"); | |
13dcc150 | 4319 | |
267785bc | 4320 | stmt = (*runtime.finish_try_stmt) (&cur_try_context); |
4321 | add_stmt (stmt); | |
13dcc150 | 4322 | |
267785bc | 4323 | cur_try_context = c->outer; |
4324 | free (c); | |
4325 | return stmt; | |
4326 | } | |
c17b85ea | 4327 | |
260fbc4e | 4328 | tree |
267785bc | 4329 | objc_build_throw_stmt (location_t loc, tree throw_expr) |
260fbc4e | 4330 | { |
267785bc | 4331 | bool rethrown = false; |
13dcc150 | 4332 | |
267785bc | 4333 | objc_maybe_warn_exceptions (loc); |
13dcc150 | 4334 | |
267785bc | 4335 | /* Don't waste time trying to build something if we're already dead. */ |
4336 | if (throw_expr == error_mark_node) | |
4337 | return error_mark_node; | |
13dcc150 | 4338 | |
267785bc | 4339 | if (throw_expr == NULL) |
4340 | { | |
4341 | /* If we're not inside a @catch block, there is no "current | |
4342 | exception" to be rethrown. */ | |
4343 | if (cur_try_context == NULL | |
4344 | || cur_try_context->current_catch == NULL) | |
4345 | { | |
4346 | error_at (loc, "%<@throw%> (rethrow) used outside of a @catch block"); | |
4347 | return error_mark_node; | |
4348 | } | |
4349 | ||
4350 | /* Otherwise the object is still sitting in the EXC_PTR_EXPR | |
4351 | value that we get from the runtime. */ | |
4352 | throw_expr = (*runtime.build_exc_ptr) (&cur_try_context); | |
4353 | rethrown = true; | |
4354 | } | |
4355 | else | |
4356 | { | |
4357 | if (!objc_type_valid_for_messaging (TREE_TYPE (throw_expr), true)) | |
4358 | { | |
4359 | error_at (loc, "%<@throw%> argument is not an object"); | |
4360 | return error_mark_node; | |
4361 | } | |
4362 | } | |
4363 | ||
4364 | return (*runtime.build_throw_stmt) (loc, throw_expr, rethrown); | |
fc304191 | 4365 | } |
4366 | ||
267785bc | 4367 | tree |
4368 | objc_build_synchronized (location_t start_locus, tree object_expr, tree body) | |
0ced0389 | 4369 | { |
267785bc | 4370 | /* object_expr should never be NULL; but in case it is, convert it to |
4371 | error_mark_node. */ | |
4372 | if (object_expr == NULL) | |
4373 | object_expr = error_mark_node; | |
0ced0389 | 4374 | |
267785bc | 4375 | /* Validate object_expr. If not valid, set it to error_mark_node. */ |
4376 | if (object_expr != error_mark_node) | |
0ced0389 | 4377 | { |
267785bc | 4378 | if (!objc_type_valid_for_messaging (TREE_TYPE (object_expr), true)) |
4379 | { | |
4380 | error_at (start_locus, "%<@synchronized%> argument is not an object"); | |
4381 | object_expr = error_mark_node; | |
4382 | } | |
0ced0389 | 4383 | } |
6bbb4715 | 4384 | |
267785bc | 4385 | if (object_expr == error_mark_node) |
4386 | { | |
4387 | /* If we found an error, we simply ignore the '@synchronized'. | |
4388 | Compile the body so we can keep going with minimal | |
4389 | casualties. */ | |
4390 | return add_stmt (body); | |
4391 | } | |
4392 | else | |
4393 | { | |
4394 | tree call; | |
4395 | tree args; | |
0ced0389 | 4396 | |
6bbb4715 | 4397 | /* objc_sync_enter (object_expr); */ |
267785bc | 4398 | object_expr = save_expr (object_expr); |
4399 | args = tree_cons (NULL, object_expr, NULL); | |
4400 | call = build_function_call (input_location, | |
4401 | objc_sync_enter_decl, args); | |
4402 | SET_EXPR_LOCATION (call, start_locus); | |
4403 | add_stmt (call); | |
0ced0389 | 4404 | |
267785bc | 4405 | /* Build "objc_sync_exit (object_expr);" but do not add it yet; |
4406 | it goes inside the @finalize() clause. */ | |
4407 | args = tree_cons (NULL, object_expr, NULL); | |
4408 | call = build_function_call (input_location, | |
4409 | objc_sync_exit_decl, args); | |
4410 | SET_EXPR_LOCATION (call, input_location); | |
0ced0389 | 4411 | |
267785bc | 4412 | /* @try { body; } */ |
4413 | objc_begin_try_stmt (start_locus, body); | |
6bbb4715 | 4414 | |
267785bc | 4415 | /* @finally { objc_sync_exit (object_expr); } */ |
4416 | objc_build_finally_clause (input_location, call); | |
6bbb4715 | 4417 | |
267785bc | 4418 | /* End of try statement. */ |
4419 | return objc_finish_try_stmt (); | |
4420 | } | |
0ced0389 | 4421 | } |
4422 | ||
267785bc | 4423 | /* Construct a C struct corresponding to ObjC class CLASS, with the same |
4424 | name as the class: | |
0ced0389 | 4425 | |
267785bc | 4426 | struct <classname> { |
4427 | struct _objc_class *isa; | |
4428 | ... | |
4429 | }; */ | |
0ced0389 | 4430 | |
267785bc | 4431 | static void |
4432 | build_private_template (tree klass) | |
0ced0389 | 4433 | { |
267785bc | 4434 | if (!CLASS_STATIC_TEMPLATE (klass)) |
4435 | { | |
4436 | tree record = objc_build_struct (klass, | |
4437 | get_class_ivars (klass, false), | |
4438 | CLASS_SUPER_NAME (klass)); | |
0ced0389 | 4439 | |
267785bc | 4440 | /* Set the TREE_USED bit for this struct, so that stab generator |
4441 | can emit stabs for this struct type. */ | |
4442 | if (flag_debug_only_used_symbols && TYPE_STUB_DECL (record)) | |
4443 | TREE_USED (TYPE_STUB_DECL (record)) = 1; | |
0ced0389 | 4444 | |
267785bc | 4445 | /* Copy the attributes from the class to the type. */ |
4446 | if (TREE_DEPRECATED (klass)) | |
4447 | TREE_DEPRECATED (record) = 1; | |
267785bc | 4448 | } |
0ced0389 | 4449 | } |
4450 | ||
267785bc | 4451 | /* Generate either '- .cxx_construct' or '- .cxx_destruct' for the |
4452 | current class. */ | |
4453 | #ifdef OBJCPLUS | |
4454 | static void | |
4455 | objc_generate_cxx_ctor_or_dtor (bool dtor) | |
4456 | { | |
4457 | tree fn, body, compound_stmt, ivar; | |
0ced0389 | 4458 | |
267785bc | 4459 | /* - (id) .cxx_construct { ... return self; } */ |
4460 | /* - (void) .cxx_construct { ... } */ | |
0ced0389 | 4461 | |
267785bc | 4462 | objc_start_method_definition |
4463 | (false /* is_class_method */, | |
4464 | objc_build_method_signature (false /* is_class_method */, | |
4465 | build_tree_list (NULL_TREE, | |
4466 | dtor | |
4467 | ? void_type_node | |
4468 | : objc_object_type), | |
4469 | get_identifier (dtor | |
4470 | ? TAG_CXX_DESTRUCT | |
4471 | : TAG_CXX_CONSTRUCT), | |
4472 | make_node (TREE_LIST), | |
4232a958 | 4473 | false), NULL, NULL_TREE); |
267785bc | 4474 | body = begin_function_body (); |
4475 | compound_stmt = begin_compound_stmt (0); | |
0ced0389 | 4476 | |
267785bc | 4477 | ivar = CLASS_IVARS (implementation_template); |
4478 | /* Destroy ivars in reverse order. */ | |
4479 | if (dtor) | |
4480 | ivar = nreverse (copy_list (ivar)); | |
6db57367 | 4481 | |
267785bc | 4482 | for (; ivar; ivar = TREE_CHAIN (ivar)) |
0ced0389 | 4483 | { |
267785bc | 4484 | if (TREE_CODE (ivar) == FIELD_DECL) |
0ced0389 | 4485 | { |
267785bc | 4486 | tree type = TREE_TYPE (ivar); |
0ced0389 | 4487 | |
267785bc | 4488 | /* Call the ivar's default constructor or destructor. Do not |
4489 | call the destructor unless a corresponding constructor call | |
4490 | has also been made (or is not needed). */ | |
4491 | if (MAYBE_CLASS_TYPE_P (type) | |
4492 | && (dtor | |
4493 | ? (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type) | |
4494 | && (!TYPE_NEEDS_CONSTRUCTING (type) | |
4495 | || TYPE_HAS_DEFAULT_CONSTRUCTOR (type))) | |
4496 | : (TYPE_NEEDS_CONSTRUCTING (type) | |
4497 | && TYPE_HAS_DEFAULT_CONSTRUCTOR (type)))) | |
4498 | finish_expr_stmt | |
4499 | (build_special_member_call | |
4500 | (build_ivar_reference (DECL_NAME (ivar)), | |
4501 | dtor ? complete_dtor_identifier : complete_ctor_identifier, | |
4502 | NULL, type, LOOKUP_NORMAL, tf_warning_or_error)); | |
0ced0389 | 4503 | } |
267785bc | 4504 | } |
0ced0389 | 4505 | |
267785bc | 4506 | /* The constructor returns 'self'. */ |
4507 | if (!dtor) | |
4508 | finish_return_stmt (self_decl); | |
0ced0389 | 4509 | |
267785bc | 4510 | finish_compound_stmt (compound_stmt); |
4511 | finish_function_body (body); | |
4512 | fn = current_function_decl; | |
4513 | finish_function (); | |
4514 | objc_finish_method_definition (fn); | |
4515 | } | |
0ced0389 | 4516 | |
267785bc | 4517 | /* The following routine will examine the current @interface for any |
4518 | non-POD C++ ivars requiring non-trivial construction and/or | |
4519 | destruction, and then synthesize special '- .cxx_construct' and/or | |
4520 | '- .cxx_destruct' methods which will run the appropriate | |
4521 | construction or destruction code. Note that ivars inherited from | |
4522 | super-classes are _not_ considered. */ | |
4523 | static void | |
4524 | objc_generate_cxx_cdtors (void) | |
4525 | { | |
4526 | bool need_ctor = false, need_dtor = false; | |
4527 | tree ivar; | |
0ced0389 | 4528 | |
267785bc | 4529 | /* Error case, due to possibly an extra @end. */ |
4530 | if (!objc_implementation_context) | |
4531 | return; | |
0ced0389 | 4532 | |
267785bc | 4533 | /* We do not want to do this for categories, since they do not have |
4534 | their own ivars. */ | |
0ced0389 | 4535 | |
267785bc | 4536 | if (TREE_CODE (objc_implementation_context) != CLASS_IMPLEMENTATION_TYPE) |
4537 | return; | |
0ced0389 | 4538 | |
267785bc | 4539 | /* First, determine if we even need a constructor and/or destructor. */ |
0ced0389 | 4540 | |
267785bc | 4541 | for (ivar = CLASS_IVARS (implementation_template); ivar; |
4542 | ivar = TREE_CHAIN (ivar)) | |
4543 | { | |
4544 | if (TREE_CODE (ivar) == FIELD_DECL) | |
4545 | { | |
4546 | tree type = TREE_TYPE (ivar); | |
0ced0389 | 4547 | |
267785bc | 4548 | if (MAYBE_CLASS_TYPE_P (type)) |
4549 | { | |
4550 | if (TYPE_NEEDS_CONSTRUCTING (type) | |
4551 | && TYPE_HAS_DEFAULT_CONSTRUCTOR (type)) | |
4552 | /* NB: If a default constructor is not available, we will not | |
4553 | be able to initialize this ivar; the add_instance_variable() | |
4554 | routine will already have warned about this. */ | |
4555 | need_ctor = true; | |
4556 | ||
4557 | if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type) | |
4558 | && (!TYPE_NEEDS_CONSTRUCTING (type) | |
4559 | || TYPE_HAS_DEFAULT_CONSTRUCTOR (type))) | |
4560 | /* NB: If a default constructor is not available, we will not | |
4561 | call the destructor either, for symmetry. */ | |
4562 | need_dtor = true; | |
4563 | } | |
4564 | } | |
0ced0389 | 4565 | } |
4566 | ||
267785bc | 4567 | /* Generate '- .cxx_construct' if needed. */ |
0ced0389 | 4568 | |
267785bc | 4569 | if (need_ctor) |
4570 | objc_generate_cxx_ctor_or_dtor (false); | |
0ced0389 | 4571 | |
267785bc | 4572 | /* Generate '- .cxx_destruct' if needed. */ |
3c905014 | 4573 | |
267785bc | 4574 | if (need_dtor) |
4575 | objc_generate_cxx_ctor_or_dtor (true); | |
4576 | ||
4577 | /* The 'imp_list' variable points at an imp_entry record for the current | |
4578 | @implementation. Record the existence of '- .cxx_construct' and/or | |
4579 | '- .cxx_destruct' methods therein; it will be included in the | |
4580 | metadata for the class if the runtime needs it. */ | |
4581 | imp_list->has_cxx_cdtors = (need_ctor || need_dtor); | |
0ced0389 | 4582 | } |
267785bc | 4583 | #endif |
0ced0389 | 4584 | |
267785bc | 4585 | static void |
4586 | error_with_ivar (const char *message, tree decl) | |
0ced0389 | 4587 | { |
267785bc | 4588 | error_at (DECL_SOURCE_LOCATION (decl), "%s %qs", |
4589 | message, identifier_to_locale (gen_declaration (decl))); | |
4590 | ||
0ced0389 | 4591 | } |
4592 | ||
267785bc | 4593 | static void |
4594 | check_ivars (tree inter, tree imp) | |
0ced0389 | 4595 | { |
267785bc | 4596 | tree intdecls = CLASS_RAW_IVARS (inter); |
4597 | tree impdecls = CLASS_RAW_IVARS (imp); | |
4598 | ||
4599 | while (1) | |
4600 | { | |
4601 | tree t1, t2; | |
4602 | ||
c17b85ea | 4603 | #ifdef OBJCPLUS |
267785bc | 4604 | if (intdecls && TREE_CODE (intdecls) == TYPE_DECL) |
4605 | intdecls = TREE_CHAIN (intdecls); | |
c17b85ea | 4606 | #endif |
267785bc | 4607 | if (intdecls == 0 && impdecls == 0) |
4608 | break; | |
4609 | if (intdecls == 0 || impdecls == 0) | |
4610 | { | |
4611 | error ("inconsistent instance variable specification"); | |
4612 | break; | |
4613 | } | |
0ced0389 | 4614 | |
267785bc | 4615 | t1 = TREE_TYPE (intdecls); t2 = TREE_TYPE (impdecls); |
0ced0389 | 4616 | |
267785bc | 4617 | if (!comptypes (t1, t2) |
4618 | || !tree_int_cst_equal (DECL_INITIAL (intdecls), | |
4619 | DECL_INITIAL (impdecls))) | |
4620 | { | |
4621 | if (DECL_NAME (intdecls) == DECL_NAME (impdecls)) | |
4622 | { | |
4623 | error_with_ivar ("conflicting instance variable type", | |
4624 | impdecls); | |
4625 | error_with_ivar ("previous declaration of", | |
4626 | intdecls); | |
4627 | } | |
4628 | else /* both the type and the name don't match */ | |
4629 | { | |
4630 | error ("inconsistent instance variable specification"); | |
4631 | break; | |
4632 | } | |
4633 | } | |
c17b85ea | 4634 | |
267785bc | 4635 | else if (DECL_NAME (intdecls) != DECL_NAME (impdecls)) |
4636 | { | |
4637 | error_with_ivar ("conflicting instance variable name", | |
4638 | impdecls); | |
4639 | error_with_ivar ("previous declaration of", | |
4640 | intdecls); | |
4641 | } | |
c17b85ea | 4642 | |
267785bc | 4643 | intdecls = DECL_CHAIN (intdecls); |
4644 | impdecls = DECL_CHAIN (impdecls); | |
4645 | } | |
c17b85ea | 4646 | } |
4647 | ||
267785bc | 4648 | |
4649 | static void | |
4650 | mark_referenced_methods (void) | |
e93ea189 | 4651 | { |
267785bc | 4652 | struct imp_entry *impent; |
4653 | tree chain; | |
e93ea189 | 4654 | |
267785bc | 4655 | for (impent = imp_list; impent; impent = impent->next) |
4656 | { | |
4657 | chain = CLASS_CLS_METHODS (impent->imp_context); | |
4658 | while (chain) | |
4659 | { | |
415d1b9a | 4660 | cgraph_node::get_create (METHOD_DEFINITION (chain))->mark_force_output (); |
267785bc | 4661 | chain = DECL_CHAIN (chain); |
4662 | } | |
e93ea189 | 4663 | |
267785bc | 4664 | chain = CLASS_NST_METHODS (impent->imp_context); |
4665 | while (chain) | |
4666 | { | |
415d1b9a | 4667 | cgraph_node::get_create (METHOD_DEFINITION (chain))->mark_force_output (); |
267785bc | 4668 | chain = DECL_CHAIN (chain); |
4669 | } | |
4670 | } | |
4671 | } | |
c450c529 | 4672 | |
267785bc | 4673 | /* If type is empty or only type qualifiers are present, add default |
4674 | type of id (otherwise grokdeclarator will default to int). */ | |
4675 | static inline tree | |
4676 | adjust_type_for_id_default (tree type) | |
c450c529 | 4677 | { |
267785bc | 4678 | if (!type) |
4679 | type = make_node (TREE_LIST); | |
499ea517 | 4680 | |
267785bc | 4681 | if (!TREE_VALUE (type)) |
4682 | TREE_VALUE (type) = objc_object_type; | |
4683 | else if (TREE_CODE (TREE_VALUE (type)) == RECORD_TYPE | |
4684 | && TYPED_OBJECT (TREE_VALUE (type))) | |
4685 | error ("can not use an object as parameter to a method"); | |
c17b85ea | 4686 | |
267785bc | 4687 | return type; |
c17b85ea | 4688 | } |
4689 | ||
267785bc | 4690 | /* Return a KEYWORD_DECL built using the specified key_name, arg_type, |
4691 | arg_name and attributes. (TODO: Rename KEYWORD_DECL to | |
4692 | OBJC_METHOD_PARM_DECL ?) | |
c17b85ea | 4693 | |
267785bc | 4694 | A KEYWORD_DECL is a tree representing the declaration of a |
4695 | parameter of an Objective-C method. It is produced when parsing a | |
4696 | fragment of Objective-C method declaration of the form | |
c17b85ea | 4697 | |
267785bc | 4698 | keyworddecl: |
4699 | selector ':' '(' typename ')' identifier | |
c17b85ea | 4700 | |
267785bc | 4701 | For example, take the Objective-C method |
c17b85ea | 4702 | |
6bbb4715 | 4703 | -(NSString *)pathForResource:(NSString *)resource ofType:(NSString *)type; |
c17b85ea | 4704 | |
267785bc | 4705 | the two fragments "pathForResource:(NSString *)resource" and |
4706 | "ofType:(NSString *)type" will generate a KEYWORD_DECL each. The | |
4707 | KEYWORD_DECL stores the 'key_name' (eg, identifier for | |
4708 | "pathForResource"), the 'arg_type' (eg, tree representing a | |
4709 | NSString *), the 'arg_name' (eg identifier for "resource") and | |
4710 | potentially some attributes (for example, a tree representing | |
4711 | __attribute__ ((unused)) if such an attribute was attached to a | |
4712 | certain parameter). You can access this information using the | |
4713 | TREE_TYPE (for arg_type), KEYWORD_ARG_NAME (for arg_name), | |
4714 | KEYWORD_KEY_NAME (for key_name), DECL_ATTRIBUTES (for attributes). | |
c17b85ea | 4715 | |
267785bc | 4716 | 'key_name' is an identifier node (and is optional as you can omit |
4717 | it in Objective-C methods). | |
4718 | 'arg_type' is a tree list (and is optional too if no parameter type | |
4719 | was specified). | |
4720 | 'arg_name' is an identifier node and is required. | |
4721 | 'attributes' is an optional tree containing parameter attributes. */ | |
4722 | tree | |
6bbb4715 | 4723 | objc_build_keyword_decl (tree key_name, tree arg_type, |
267785bc | 4724 | tree arg_name, tree attributes) |
4725 | { | |
4726 | tree keyword_decl; | |
c17b85ea | 4727 | |
267785bc | 4728 | if (flag_objc1_only && attributes) |
4729 | error_at (input_location, "method argument attributes are not available in Objective-C 1.0"); | |
c17b85ea | 4730 | |
267785bc | 4731 | /* If no type is specified, default to "id". */ |
4732 | arg_type = adjust_type_for_id_default (arg_type); | |
2363ef00 | 4733 | |
267785bc | 4734 | keyword_decl = make_node (KEYWORD_DECL); |
58d82cd0 | 4735 | |
267785bc | 4736 | TREE_TYPE (keyword_decl) = arg_type; |
4737 | KEYWORD_ARG_NAME (keyword_decl) = arg_name; | |
4738 | KEYWORD_KEY_NAME (keyword_decl) = key_name; | |
4739 | DECL_ATTRIBUTES (keyword_decl) = attributes; | |
c17b85ea | 4740 | |
267785bc | 4741 | return keyword_decl; |
c17b85ea | 4742 | } |
e24e8df7 | 4743 | |
267785bc | 4744 | /* Given a chain of keyword_decl's, synthesize the full keyword selector. */ |
4745 | static tree | |
4746 | build_keyword_selector (tree selector) | |
c17b85ea | 4747 | { |
267785bc | 4748 | int len = 0; |
4749 | tree key_chain, key_name; | |
4750 | char *buf; | |
c17b85ea | 4751 | |
267785bc | 4752 | /* Scan the selector to see how much space we'll need. */ |
4753 | for (key_chain = selector; key_chain; key_chain = TREE_CHAIN (key_chain)) | |
a654f093 | 4754 | { |
267785bc | 4755 | switch (TREE_CODE (selector)) |
33b3681f | 4756 | { |
267785bc | 4757 | case KEYWORD_DECL: |
4758 | key_name = KEYWORD_KEY_NAME (key_chain); | |
4759 | break; | |
4760 | case TREE_LIST: | |
4761 | key_name = TREE_PURPOSE (key_chain); | |
4762 | break; | |
4763 | default: | |
4764 | gcc_unreachable (); | |
33b3681f | 4765 | } |
267785bc | 4766 | |
4767 | if (key_name) | |
4768 | len += IDENTIFIER_LENGTH (key_name) + 1; | |
4769 | else | |
4770 | /* Just a ':' arg. */ | |
4771 | len++; | |
33b3681f | 4772 | } |
a654f093 | 4773 | |
267785bc | 4774 | buf = (char *) alloca (len + 1); |
4775 | /* Start the buffer out as an empty string. */ | |
4776 | buf[0] = '\0'; | |
e24e8df7 | 4777 | |
267785bc | 4778 | for (key_chain = selector; key_chain; key_chain = TREE_CHAIN (key_chain)) |
e24e8df7 | 4779 | { |
267785bc | 4780 | switch (TREE_CODE (selector)) |
e24e8df7 | 4781 | { |
267785bc | 4782 | case KEYWORD_DECL: |
4783 | key_name = KEYWORD_KEY_NAME (key_chain); | |
4784 | break; | |
4785 | case TREE_LIST: | |
4786 | key_name = TREE_PURPOSE (key_chain); | |
4787 | /* The keyword decl chain will later be used as a function | |
4788 | argument chain. Unhook the selector itself so as to not | |
4789 | confuse other parts of the compiler. */ | |
4790 | TREE_PURPOSE (key_chain) = NULL_TREE; | |
4791 | break; | |
4792 | default: | |
4793 | gcc_unreachable (); | |
e24e8df7 | 4794 | } |
c17b85ea | 4795 | |
267785bc | 4796 | if (key_name) |
4797 | strcat (buf, IDENTIFIER_POINTER (key_name)); | |
4798 | strcat (buf, ":"); | |
4799 | } | |
c17b85ea | 4800 | |
d546b341 | 4801 | return get_identifier_with_length (buf, len); |
c17b85ea | 4802 | } |
4803 | ||
267785bc | 4804 | /* Used for declarations and definitions. */ |
e24e8df7 | 4805 | |
4806 | static tree | |
267785bc | 4807 | build_method_decl (enum tree_code code, tree ret_type, tree selector, |
4808 | tree add_args, bool ellipsis) | |
c17b85ea | 4809 | { |
267785bc | 4810 | tree method_decl; |
c17b85ea | 4811 | |
267785bc | 4812 | /* If no type is specified, default to "id". */ |
4813 | ret_type = adjust_type_for_id_default (ret_type); | |
c17b85ea | 4814 | |
267785bc | 4815 | /* Note how a method_decl has a TREE_TYPE which is not the function |
4816 | type of the function implementing the method, but only the return | |
4817 | type of the method. We may want to change this, and store the | |
4818 | entire function type in there (eg, it may be used to simplify | |
4819 | dealing with attributes below). */ | |
4820 | method_decl = make_node (code); | |
4821 | TREE_TYPE (method_decl) = ret_type; | |
c17b85ea | 4822 | |
267785bc | 4823 | /* If we have a keyword selector, create an identifier_node that |
4824 | represents the full selector name (`:' included)... */ | |
4825 | if (TREE_CODE (selector) == KEYWORD_DECL) | |
4826 | { | |
4827 | METHOD_SEL_NAME (method_decl) = build_keyword_selector (selector); | |
4828 | METHOD_SEL_ARGS (method_decl) = selector; | |
4829 | METHOD_ADD_ARGS (method_decl) = add_args; | |
4830 | METHOD_ADD_ARGS_ELLIPSIS_P (method_decl) = ellipsis; | |
4831 | } | |
4832 | else | |
4833 | { | |
4834 | METHOD_SEL_NAME (method_decl) = selector; | |
4835 | METHOD_SEL_ARGS (method_decl) = NULL_TREE; | |
4836 | METHOD_ADD_ARGS (method_decl) = NULL_TREE; | |
4837 | } | |
c17b85ea | 4838 | |
267785bc | 4839 | return method_decl; |
c17b85ea | 4840 | } |
4841 | ||
267785bc | 4842 | /* This routine processes objective-c method attributes. */ |
6db57367 | 4843 | |
267785bc | 4844 | static void |
4845 | objc_decl_method_attributes (tree *node, tree attributes, int flags) | |
c17b85ea | 4846 | { |
267785bc | 4847 | /* TODO: Replace the hackery below. An idea would be to store the |
4848 | full function type in the method declaration (for example in | |
4849 | TREE_TYPE) and then expose ObjC method declarations to c-family | |
4850 | and they could deal with them by simply treating them as | |
4851 | functions. */ | |
c17b85ea | 4852 | |
267785bc | 4853 | /* Because of the dangers in the hackery below, we filter out any |
4854 | attribute that we do not know about. For the ones we know about, | |
4855 | we know that they work with the hackery. For the other ones, | |
4856 | there is no guarantee, so we have to filter them out. */ | |
4857 | tree filtered_attributes = NULL_TREE; | |
c17b85ea | 4858 | |
267785bc | 4859 | if (attributes) |
c17b85ea | 4860 | { |
267785bc | 4861 | tree attribute; |
4862 | for (attribute = attributes; attribute; attribute = TREE_CHAIN (attribute)) | |
e24e8df7 | 4863 | { |
267785bc | 4864 | tree name = TREE_PURPOSE (attribute); |
6bbb4715 | 4865 | |
267785bc | 4866 | if (is_attribute_p ("deprecated", name) |
4867 | || is_attribute_p ("sentinel", name) | |
4868 | || is_attribute_p ("noreturn", name)) | |
e24e8df7 | 4869 | { |
267785bc | 4870 | /* An attribute that we support; add it to the filtered |
4871 | attributes. */ | |
6bbb4715 | 4872 | filtered_attributes = chainon (filtered_attributes, |
267785bc | 4873 | copy_node (attribute)); |
e24e8df7 | 4874 | } |
267785bc | 4875 | else if (is_attribute_p ("format", name)) |
4876 | { | |
4877 | /* "format" is special because before adding it to the | |
4878 | filtered attributes we need to adjust the specified | |
4879 | format by adding the hidden function parameters for | |
4880 | an Objective-C method (self, _cmd). */ | |
4881 | tree new_attribute = copy_node (attribute); | |
4882 | ||
4883 | /* Check the arguments specified with the attribute, and | |
4884 | modify them adding 2 for the two hidden arguments. | |
4885 | Note how this differs from C++; according to the | |
4886 | specs, C++ does not do it so you have to add the +1 | |
4887 | yourself. For Objective-C, instead, the compiler | |
4888 | adds the +2 for you. */ | |
4889 | ||
4890 | /* The attribute arguments have not been checked yet, so | |
4891 | we need to be careful as they could be missing or | |
4892 | invalid. If anything looks wrong, we skip the | |
4893 | process and the compiler will complain about it later | |
4894 | when it validates the attribute. */ | |
4895 | /* Check that we have at least three arguments. */ | |
4896 | if (TREE_VALUE (new_attribute) | |
4897 | && TREE_CHAIN (TREE_VALUE (new_attribute)) | |
4898 | && TREE_CHAIN (TREE_CHAIN (TREE_VALUE (new_attribute)))) | |
4899 | { | |
4900 | tree second_argument = TREE_CHAIN (TREE_VALUE (new_attribute)); | |
4901 | tree third_argument = TREE_CHAIN (second_argument); | |
4902 | tree number; | |
c17b85ea | 4903 | |
267785bc | 4904 | /* This is the second argument, the "string-index", |
4905 | which specifies the index of the format string | |
4906 | argument. Add 2. */ | |
4907 | number = TREE_VALUE (second_argument); | |
936a705d | 4908 | if (number |
4909 | && TREE_CODE (number) == INTEGER_CST | |
4910 | && !wi::eq_p (number, 0)) | |
e913b5cd | 4911 | TREE_VALUE (second_argument) |
705abd1a | 4912 | = wide_int_to_tree (TREE_TYPE (number), |
4913 | wi::add (number, 2)); | |
6bbb4715 | 4914 | |
267785bc | 4915 | /* This is the third argument, the "first-to-check", |
4916 | which specifies the index of the first argument to | |
4917 | check. This could be 0, meaning it is not available, | |
4918 | in which case we don't need to add 2. Add 2 if not | |
4919 | 0. */ | |
4920 | number = TREE_VALUE (third_argument); | |
936a705d | 4921 | if (number |
4922 | && TREE_CODE (number) == INTEGER_CST | |
4923 | && !wi::eq_p (number, 0)) | |
e913b5cd | 4924 | TREE_VALUE (third_argument) |
705abd1a | 4925 | = wide_int_to_tree (TREE_TYPE (number), |
4926 | wi::add (number, 2)); | |
267785bc | 4927 | } |
4928 | filtered_attributes = chainon (filtered_attributes, | |
4929 | new_attribute); | |
4930 | } | |
5aaf62c7 | 4931 | else if (is_attribute_p ("nonnull", name)) |
4932 | { | |
4933 | /* We need to fixup all the argument indexes by adding 2 | |
4934 | for the two hidden arguments of an Objective-C method | |
4935 | invocation, similat to what we do above for the | |
4936 | "format" attribute. */ | |
4937 | /* FIXME: This works great in terms of implementing the | |
4938 | functionality, but the warnings that are produced by | |
4939 | nonnull do mention the argument index (while the | |
4940 | format ones don't). For example, you could get | |
4941 | "warning: null argument where non-null required | |
4942 | (argument 3)". Now in that message, "argument 3" | |
4943 | includes the 2 hidden arguments; it would be much | |
4944 | more friendly to call it "argument 1", as that would | |
4945 | be consistent with __attribute__ ((nonnnull (1))). | |
4946 | To do this, we'd need to have the C family code that | |
4947 | checks the arguments know about adding/removing 2 to | |
4948 | the argument index ... or alternatively we could | |
4949 | maybe store the "printable" argument index in | |
4950 | addition to the actual argument index ? Some | |
4951 | refactoring is needed to do this elegantly. */ | |
4952 | tree new_attribute = copy_node (attribute); | |
4953 | tree argument = TREE_VALUE (attribute); | |
4954 | while (argument != NULL_TREE) | |
4955 | { | |
4956 | /* Get the value of the argument and add 2. */ | |
4957 | tree number = TREE_VALUE (argument); | |
2c5faab9 | 4958 | if (number && TREE_CODE (number) == INTEGER_CST |
796b6678 | 4959 | && !wi::eq_p (number, 0)) |
e913b5cd | 4960 | TREE_VALUE (argument) |
705abd1a | 4961 | = wide_int_to_tree (TREE_TYPE (number), |
4962 | wi::add (number, 2)); | |
5aaf62c7 | 4963 | argument = TREE_CHAIN (argument); |
4964 | } | |
4965 | ||
4966 | filtered_attributes = chainon (filtered_attributes, | |
4967 | new_attribute); | |
4968 | } | |
267785bc | 4969 | else |
4970 | warning (OPT_Wattributes, "%qE attribute directive ignored", name); | |
e24e8df7 | 4971 | } |
4972 | } | |
c17b85ea | 4973 | |
267785bc | 4974 | if (filtered_attributes) |
c17b85ea | 4975 | { |
267785bc | 4976 | /* This hackery changes the TREE_TYPE of the ObjC method |
4977 | declaration to be a function type, so that decl_attributes | |
4978 | will treat the ObjC method as if it was a function. Some | |
4979 | attributes (sentinel, format) will be applied to the function | |
4980 | type, changing it in place; so after calling decl_attributes, | |
4981 | we extract the function type attributes and store them in | |
4982 | METHOD_TYPE_ATTRIBUTES. Some other attributes (noreturn, | |
4983 | deprecated) are applied directly to the method declaration | |
4984 | (by setting TREE_DEPRECATED and TREE_THIS_VOLATILE) so there | |
4985 | is nothing to do. */ | |
4986 | tree saved_type = TREE_TYPE (*node); | |
5318d5a9 | 4987 | TREE_TYPE (*node) |
4988 | = build_function_type_for_method (TREE_VALUE (saved_type), *node, | |
4989 | METHOD_REF, 0); | |
267785bc | 4990 | decl_attributes (node, filtered_attributes, flags); |
4991 | METHOD_TYPE_ATTRIBUTES (*node) = TYPE_ATTRIBUTES (TREE_TYPE (*node)); | |
4992 | TREE_TYPE (*node) = saved_type; | |
c17b85ea | 4993 | } |
c17b85ea | 4994 | } |
4995 | ||
6bbb4715 | 4996 | bool |
267785bc | 4997 | objc_method_decl (enum tree_code opcode) |
4998 | { | |
4999 | return opcode == INSTANCE_METHOD_DECL || opcode == CLASS_METHOD_DECL; | |
5000 | } | |
c17b85ea | 5001 | |
5318d5a9 | 5002 | /* Return a function type for METHOD with RETURN_TYPE. CONTEXT is |
5003 | either METHOD_DEF or METHOD_REF, indicating whether we are defining a | |
5004 | method or calling one. SUPER_FLAG indicates whether this is a send | |
5005 | to super; this makes a difference for the NeXT calling sequence in | |
5006 | which the lookup and the method call are done together. If METHOD is | |
5007 | NULL, user-defined arguments (i.e., beyond self and _cmd) shall be | |
5008 | represented as varargs. */ | |
c17b85ea | 5009 | |
267785bc | 5010 | tree |
5318d5a9 | 5011 | build_function_type_for_method (tree return_type, tree method, |
5012 | int context, bool super_flag) | |
e24e8df7 | 5013 | { |
f1f41a6c | 5014 | vec<tree, va_gc> *argtypes = make_tree_vector (); |
5318d5a9 | 5015 | tree t, ftype; |
5016 | bool is_varargs = false; | |
e24e8df7 | 5017 | |
5318d5a9 | 5018 | (*runtime.get_arg_type_list_base) (&argtypes, method, context, super_flag); |
e24e8df7 | 5019 | |
5318d5a9 | 5020 | /* No actual method prototype given; remaining args passed as varargs. */ |
5021 | if (method == NULL_TREE) | |
5022 | { | |
5023 | is_varargs = true; | |
5024 | goto build_ftype; | |
5025 | } | |
e24e8df7 | 5026 | |
5318d5a9 | 5027 | for (t = METHOD_SEL_ARGS (method); t; t = DECL_CHAIN (t)) |
267785bc | 5028 | { |
5318d5a9 | 5029 | tree arg_type = TREE_VALUE (TREE_TYPE (t)); |
e24e8df7 | 5030 | |
5318d5a9 | 5031 | /* Decay argument types for the underlying C function as |
5032 | appropriate. */ | |
267785bc | 5033 | arg_type = objc_decay_parm_type (arg_type); |
e24e8df7 | 5034 | |
f1f41a6c | 5035 | vec_safe_push (argtypes, arg_type); |
267785bc | 5036 | } |
e24e8df7 | 5037 | |
5318d5a9 | 5038 | if (METHOD_ADD_ARGS (method)) |
c17b85ea | 5039 | { |
5318d5a9 | 5040 | for (t = TREE_CHAIN (METHOD_ADD_ARGS (method)); |
5041 | t; t = TREE_CHAIN (t)) | |
267785bc | 5042 | { |
5318d5a9 | 5043 | tree arg_type = TREE_TYPE (TREE_VALUE (t)); |
267785bc | 5044 | |
5045 | arg_type = objc_decay_parm_type (arg_type); | |
e24e8df7 | 5046 | |
f1f41a6c | 5047 | vec_safe_push (argtypes, arg_type); |
267785bc | 5048 | } |
e24e8df7 | 5049 | |
5318d5a9 | 5050 | if (METHOD_ADD_ARGS_ELLIPSIS_P (method)) |
5051 | is_varargs = true; | |
c17b85ea | 5052 | } |
5318d5a9 | 5053 | |
5054 | build_ftype: | |
5055 | if (is_varargs) | |
5056 | ftype = build_varargs_function_type_vec (return_type, argtypes); | |
e24e8df7 | 5057 | else |
5318d5a9 | 5058 | ftype = build_function_type_vec (return_type, argtypes); |
c17b85ea | 5059 | |
5318d5a9 | 5060 | release_tree_vector (argtypes); |
5061 | return ftype; | |
267785bc | 5062 | } |
c17b85ea | 5063 | |
f41791cf | 5064 | /* The 'method' argument is a tree; this tree could either be a single |
5065 | method, which is returned, or could be a TREE_VEC containing a list | |
5066 | of methods. In that case, the first one is returned, and warnings | |
5067 | are issued as appropriate. */ | |
267785bc | 5068 | static tree |
f41791cf | 5069 | check_duplicates (tree method, int methods, int is_class) |
e24e8df7 | 5070 | { |
f41791cf | 5071 | tree first_method; |
5072 | size_t i; | |
c17b85ea | 5073 | |
f41791cf | 5074 | if (method == NULL_TREE) |
5075 | return NULL_TREE; | |
267785bc | 5076 | |
f41791cf | 5077 | if (TREE_CODE (method) != TREE_VEC) |
5078 | return method; | |
5079 | ||
5080 | /* We have two or more methods with the same name but different | |
5081 | types. */ | |
5082 | first_method = TREE_VEC_ELT (method, 0); | |
5083 | ||
5084 | /* But just how different are those types? If | |
5085 | -Wno-strict-selector-match is specified, we shall not complain if | |
5086 | the differences are solely among types with identical size and | |
5087 | alignment. */ | |
5088 | if (!warn_strict_selector_match) | |
5089 | { | |
d69c64b7 | 5090 | for (i = 0; i < (size_t) TREE_VEC_LENGTH (method); i++) |
f41791cf | 5091 | if (!comp_proto_with_proto (first_method, TREE_VEC_ELT (method, i), 0)) |
5092 | goto issue_warning; | |
5093 | ||
5094 | return first_method; | |
e24e8df7 | 5095 | } |
f41791cf | 5096 | |
5097 | issue_warning: | |
5098 | if (methods) | |
5099 | { | |
5100 | bool type = TREE_CODE (first_method) == INSTANCE_METHOD_DECL; | |
5101 | ||
5102 | warning_at (input_location, 0, | |
5103 | "multiple methods named %<%c%E%> found", | |
5104 | (is_class ? '+' : '-'), | |
5105 | METHOD_SEL_NAME (first_method)); | |
5106 | inform (DECL_SOURCE_LOCATION (first_method), "using %<%c%s%>", | |
5107 | (type ? '-' : '+'), | |
5108 | identifier_to_locale (gen_method_decl (first_method))); | |
5109 | } | |
5110 | else | |
5111 | { | |
5112 | bool type = TREE_CODE (first_method) == INSTANCE_METHOD_DECL; | |
5113 | ||
5114 | warning_at (input_location, 0, | |
5115 | "multiple selectors named %<%c%E%> found", | |
5116 | (is_class ? '+' : '-'), | |
5117 | METHOD_SEL_NAME (first_method)); | |
5118 | inform (DECL_SOURCE_LOCATION (first_method), "found %<%c%s%>", | |
5119 | (type ? '-' : '+'), | |
5120 | identifier_to_locale (gen_method_decl (first_method))); | |
5121 | } | |
5122 | ||
d69c64b7 | 5123 | for (i = 0; i < (size_t) TREE_VEC_LENGTH (method); i++) |
f41791cf | 5124 | { |
5125 | bool type = TREE_CODE (TREE_VEC_ELT (method, i)) == INSTANCE_METHOD_DECL; | |
5126 | ||
5127 | inform (DECL_SOURCE_LOCATION (TREE_VEC_ELT (method, i)), "also found %<%c%s%>", | |
5128 | (type ? '-' : '+'), | |
5129 | identifier_to_locale (gen_method_decl (TREE_VEC_ELT (method, i)))); | |
5130 | } | |
5131 | ||
5132 | return first_method; | |
e24e8df7 | 5133 | } |
c17b85ea | 5134 | |
267785bc | 5135 | /* If RECEIVER is a class reference, return the identifier node for |
5136 | the referenced class. RECEIVER is created by objc_get_class_reference, | |
5137 | so we check the exact form created depending on which runtimes are | |
5138 | used. */ | |
c17b85ea | 5139 | |
267785bc | 5140 | static tree |
5141 | receiver_is_class_object (tree receiver, int self, int super) | |
e24e8df7 | 5142 | { |
267785bc | 5143 | tree exp, arg; |
c17b85ea | 5144 | |
267785bc | 5145 | /* The receiver is 'self' or 'super' in the context of a class method. */ |
5146 | if (objc_method_context | |
5147 | && TREE_CODE (objc_method_context) == CLASS_METHOD_DECL | |
5148 | && (self || super)) | |
5149 | return (super | |
5150 | ? CLASS_SUPER_NAME (implementation_template) | |
5151 | : CLASS_NAME (implementation_template)); | |
5152 | ||
5153 | /* The runtime might encapsulate things its own way. */ | |
5154 | exp = (*runtime.receiver_is_class_object) (receiver); | |
5155 | if (exp) | |
5156 | return exp; | |
5157 | ||
5158 | /* The receiver is a function call that returns an id. Check if | |
7e23366d | 5159 | it is a call to objc_getClass, if so, pick up the class name. |
5160 | ||
5161 | This is required by the GNU runtime, which compiles | |
5162 | ||
5163 | [NSObject alloc] | |
5164 | ||
5165 | into | |
5166 | ||
5167 | [objc_get_class ("NSObject") alloc]; | |
5168 | ||
5169 | and then, to check that the receiver responds to the +alloc | |
5170 | method, needs to be able to determine that the objc_get_class() | |
5171 | call returns the NSObject class and not just a generic Class | |
5172 | pointer. | |
5173 | ||
5174 | But, traditionally this is enabled for all runtimes, not just the | |
5175 | GNU one, which means that the compiler is smarter than you'd | |
5176 | expect when dealing with objc_getClass(). For example, with the | |
5177 | Apple runtime, in the code | |
5178 | ||
5179 | [objc_getClass ("NSObject") alloc]; | |
5180 | ||
5181 | the compiler will recognize the objc_getClass() call as special | |
5182 | (due to the code below) and so will know that +alloc is called on | |
5183 | the 'NSObject' class, and can perform the corresponding checks. | |
5184 | ||
5185 | Programmers can disable this behaviour by casting the results of | |
5186 | objc_getClass() to 'Class' (this may seem weird because | |
5187 | objc_getClass() is already declared to return 'Class', but the | |
5188 | compiler treats it as a special function). This may be useful if | |
5189 | the class is never declared, and the compiler would complain | |
5190 | about a missing @interface for it. Then, you can do | |
5191 | ||
5192 | [(Class)objc_getClass ("MyClassNeverDeclared") alloc]; | |
5193 | ||
5194 | to silence the warnings. */ | |
267785bc | 5195 | if (TREE_CODE (receiver) == CALL_EXPR |
5196 | && (exp = CALL_EXPR_FN (receiver)) | |
5197 | && TREE_CODE (exp) == ADDR_EXPR | |
5198 | && (exp = TREE_OPERAND (exp, 0)) | |
5199 | && TREE_CODE (exp) == FUNCTION_DECL | |
5200 | /* For some reason, we sometimes wind up with multiple FUNCTION_DECL | |
5201 | prototypes for objc_get_class(). Thankfully, they seem to share the | |
5202 | same function type. */ | |
5203 | && TREE_TYPE (exp) == TREE_TYPE (objc_get_class_decl) | |
5204 | && !strcmp (IDENTIFIER_POINTER (DECL_NAME (exp)), runtime.tag_getclass) | |
5205 | /* We have a call to objc_get_class/objc_getClass! */ | |
5206 | && (arg = CALL_EXPR_ARG (receiver, 0))) | |
5207 | { | |
5208 | STRIP_NOPS (arg); | |
5209 | if (TREE_CODE (arg) == ADDR_EXPR | |
5210 | && (arg = TREE_OPERAND (arg, 0)) | |
5211 | && TREE_CODE (arg) == STRING_CST) | |
5212 | /* Finally, we have the class name. */ | |
5213 | return get_identifier (TREE_STRING_POINTER (arg)); | |
5214 | } | |
5215 | return 0; | |
c17b85ea | 5216 | } |
5217 | ||
267785bc | 5218 | /* If we are currently building a message expr, this holds |
5219 | the identifier of the selector of the message. This is | |
5220 | used when printing warnings about argument mismatches. */ | |
c17b85ea | 5221 | |
267785bc | 5222 | static tree current_objc_message_selector = 0; |
5223 | ||
5224 | tree | |
5225 | objc_message_selector (void) | |
e24e8df7 | 5226 | { |
267785bc | 5227 | return current_objc_message_selector; |
e24e8df7 | 5228 | } |
c17b85ea | 5229 | |
267785bc | 5230 | /* Construct an expression for sending a message. |
5231 | MESS has the object to send to in TREE_PURPOSE | |
5232 | and the argument list (including selector) in TREE_VALUE. | |
5233 | ||
5234 | (*(<abstract_decl>(*)())_msg)(receiver, selTransTbl[n], ...); | |
5235 | (*(<abstract_decl>(*)())_msgSuper)(receiver, selTransTbl[n], ...); */ | |
c17b85ea | 5236 | |
0ced0389 | 5237 | tree |
4185cf58 | 5238 | objc_build_message_expr (tree receiver, tree message_args) |
e24e8df7 | 5239 | { |
267785bc | 5240 | tree sel_name; |
5241 | #ifdef OBJCPLUS | |
4185cf58 | 5242 | tree args = TREE_PURPOSE (message_args); |
267785bc | 5243 | #else |
4185cf58 | 5244 | tree args = message_args; |
267785bc | 5245 | #endif |
5246 | tree method_params = NULL_TREE; | |
e24e8df7 | 5247 | |
267785bc | 5248 | if (TREE_CODE (receiver) == ERROR_MARK || TREE_CODE (args) == ERROR_MARK) |
5249 | return error_mark_node; | |
c17b85ea | 5250 | |
267785bc | 5251 | /* Obtain the full selector name. */ |
5252 | switch (TREE_CODE (args)) | |
e24e8df7 | 5253 | { |
267785bc | 5254 | case IDENTIFIER_NODE: |
5255 | /* A unary selector. */ | |
5256 | sel_name = args; | |
5257 | break; | |
5258 | case TREE_LIST: | |
5259 | sel_name = build_keyword_selector (args); | |
5260 | break; | |
5261 | default: | |
5262 | gcc_unreachable (); | |
e24e8df7 | 5263 | } |
267785bc | 5264 | |
5265 | /* Build the parameter list to give to the method. */ | |
5266 | if (TREE_CODE (args) == TREE_LIST) | |
5267 | #ifdef OBJCPLUS | |
4185cf58 | 5268 | method_params = chainon (args, TREE_VALUE (message_args)); |
267785bc | 5269 | #else |
e24e8df7 | 5270 | { |
267785bc | 5271 | tree chain = args, prev = NULL_TREE; |
5272 | ||
5273 | /* We have a keyword selector--check for comma expressions. */ | |
5274 | while (chain) | |
e24e8df7 | 5275 | { |
267785bc | 5276 | tree element = TREE_VALUE (chain); |
5277 | ||
5278 | /* We have a comma expression, must collapse... */ | |
5279 | if (TREE_CODE (element) == TREE_LIST) | |
5280 | { | |
5281 | if (prev) | |
5282 | TREE_CHAIN (prev) = element; | |
5283 | else | |
5284 | args = element; | |
5285 | } | |
5286 | prev = chain; | |
5287 | chain = TREE_CHAIN (chain); | |
5288 | } | |
5289 | method_params = args; | |
e24e8df7 | 5290 | } |
267785bc | 5291 | #endif |
e24e8df7 | 5292 | |
267785bc | 5293 | #ifdef OBJCPLUS |
5294 | if (processing_template_decl) | |
5295 | /* Must wait until template instantiation time. */ | |
009ec0e5 | 5296 | return build_min_nt_loc (UNKNOWN_LOCATION, MESSAGE_SEND_EXPR, receiver, |
5297 | sel_name, method_params); | |
267785bc | 5298 | #endif |
5299 | ||
5300 | return objc_finish_message_expr (receiver, sel_name, method_params, NULL); | |
c17b85ea | 5301 | } |
5302 | ||
267785bc | 5303 | /* Look up method SEL_NAME that would be suitable for receiver |
5304 | of type 'id' (if IS_CLASS is zero) or 'Class' (if IS_CLASS is | |
5305 | nonzero), and report on any duplicates. */ | |
0375a275 | 5306 | |
267785bc | 5307 | static tree |
5308 | lookup_method_in_hash_lists (tree sel_name, int is_class) | |
5309 | { | |
f41791cf | 5310 | tree method_prototype = OBJC_MAP_NOT_FOUND; |
c17b85ea | 5311 | |
267785bc | 5312 | if (!is_class) |
f41791cf | 5313 | method_prototype = objc_map_get (instance_method_map, sel_name); |
5314 | ||
5315 | if (method_prototype == OBJC_MAP_NOT_FOUND) | |
40ec327c | 5316 | { |
f41791cf | 5317 | method_prototype = objc_map_get (class_method_map, sel_name); |
267785bc | 5318 | is_class = 1; |
f41791cf | 5319 | |
5320 | if (method_prototype == OBJC_MAP_NOT_FOUND) | |
5321 | return NULL_TREE; | |
40ec327c | 5322 | } |
e24e8df7 | 5323 | |
267785bc | 5324 | return check_duplicates (method_prototype, 1, is_class); |
c17b85ea | 5325 | } |
5326 | ||
267785bc | 5327 | /* The 'objc_finish_message_expr' routine is called from within |
5328 | 'objc_build_message_expr' for non-template functions. In the case of | |
5329 | C++ template functions, it is called from 'build_expr_from_tree' | |
5330 | (in decl2.c) after RECEIVER and METHOD_PARAMS have been expanded. | |
5331 | ||
5332 | If the DEPRECATED_METHOD_PROTOTYPE argument is NULL, then we warn | |
5333 | if the method being used is deprecated. If it is not NULL, instead | |
5334 | of deprecating, we set *DEPRECATED_METHOD_PROTOTYPE to the method | |
5335 | prototype that was used and is deprecated. This is useful for | |
5336 | getter calls that are always generated when compiling dot-syntax | |
5337 | expressions, even if they may not be used. In that case, we don't | |
5338 | want the warning immediately; we produce it (if needed) at gimplify | |
5339 | stage when we are sure that the deprecated getter is being | |
5340 | used. */ | |
0ced0389 | 5341 | tree |
267785bc | 5342 | objc_finish_message_expr (tree receiver, tree sel_name, tree method_params, |
5343 | tree *deprecated_method_prototype) | |
5cada957 | 5344 | { |
267785bc | 5345 | tree method_prototype = NULL_TREE, rprotos = NULL_TREE, rtype; |
5346 | tree retval, class_tree; | |
5347 | int self, super, have_cast; | |
5cada957 | 5348 | |
267785bc | 5349 | /* We have used the receiver, so mark it as read. */ |
5350 | mark_exp_read (receiver); | |
5351 | ||
5352 | /* Extract the receiver of the message, as well as its type | |
5353 | (where the latter may take the form of a cast or be inferred | |
5354 | from the implementation context). */ | |
5355 | rtype = receiver; | |
5356 | while (TREE_CODE (rtype) == COMPOUND_EXPR | |
a53aa046 | 5357 | || TREE_CODE (rtype) == MODIFY_EXPR |
5358 | || CONVERT_EXPR_P (rtype) | |
5359 | || TREE_CODE (rtype) == COMPONENT_REF) | |
267785bc | 5360 | rtype = TREE_OPERAND (rtype, 0); |
5361 | ||
a53aa046 | 5362 | /* self is 1 if this is a message to self, 0 otherwise */ |
267785bc | 5363 | self = (rtype == self_decl); |
a53aa046 | 5364 | |
5365 | /* super is 1 if this is a message to super, 0 otherwise. */ | |
267785bc | 5366 | super = (rtype == UOBJC_SUPER_decl); |
a53aa046 | 5367 | |
5368 | /* rtype is the type of the receiver. */ | |
267785bc | 5369 | rtype = TREE_TYPE (receiver); |
5370 | ||
a53aa046 | 5371 | /* have_cast is 1 if the receiver is casted. */ |
267785bc | 5372 | have_cast = (TREE_CODE (receiver) == NOP_EXPR |
5373 | || (TREE_CODE (receiver) == COMPOUND_EXPR | |
5374 | && !IS_SUPER (rtype))); | |
5375 | ||
5376 | /* If we are calling [super dealloc], reset our warning flag. */ | |
5377 | if (super && !strcmp ("dealloc", IDENTIFIER_POINTER (sel_name))) | |
5378 | should_call_super_dealloc = 0; | |
5379 | ||
5380 | /* If the receiver is a class object, retrieve the corresponding | |
a53aa046 | 5381 | @interface, if one exists. class_tree is the class name |
5382 | identifier, or NULL_TREE if this is not a class method or the | |
5383 | class name could not be determined (as in the case "Class c; [c | |
5384 | method];"). */ | |
267785bc | 5385 | class_tree = receiver_is_class_object (receiver, self, super); |
5386 | ||
5387 | /* Now determine the receiver type (if an explicit cast has not been | |
5388 | provided). */ | |
5389 | if (!have_cast) | |
5cada957 | 5390 | { |
267785bc | 5391 | if (class_tree) |
a53aa046 | 5392 | { |
5393 | /* We are here when we have no cast, and we have a class | |
5394 | name. So, this is a plain method to a class object, as | |
5395 | in [NSObject alloc]. Find the interface corresponding to | |
5396 | the class name. */ | |
5397 | rtype = lookup_interface (class_tree); | |
5398 | ||
5399 | if (rtype == NULL_TREE) | |
5400 | { | |
5401 | /* If 'rtype' is NULL_TREE at this point it means that | |
5402 | we have seen no @interface corresponding to that | |
7e23366d | 5403 | class name, only a @class declaration (alternatively, |
5404 | this was a call such as [objc_getClass("SomeClass") | |
5405 | alloc], where we've never seen the @interface of | |
5406 | SomeClass). So, we have a class name (class_tree) | |
5407 | but no actual details of the class methods. We won't | |
5408 | be able to check that the class responds to the | |
5409 | method, and we will have to guess the method | |
5410 | prototype. Emit a warning, then keep going (this | |
5411 | will use any method with a matching name, as if the | |
5412 | receiver was of type 'Class'). */ | |
a53aa046 | 5413 | warning (0, "@interface of class %qE not found", class_tree); |
5414 | } | |
5415 | } | |
267785bc | 5416 | /* Handle `self' and `super'. */ |
5417 | else if (super) | |
5cada957 | 5418 | { |
267785bc | 5419 | if (!CLASS_SUPER_NAME (implementation_template)) |
5420 | { | |
5421 | error ("no super class declared in @interface for %qE", | |
5422 | CLASS_NAME (implementation_template)); | |
5423 | return error_mark_node; | |
5424 | } | |
5425 | rtype = lookup_interface (CLASS_SUPER_NAME (implementation_template)); | |
5cada957 | 5426 | } |
267785bc | 5427 | else if (self) |
5428 | rtype = lookup_interface (CLASS_NAME (implementation_template)); | |
5cada957 | 5429 | } |
267785bc | 5430 | |
267785bc | 5431 | if (objc_is_id (rtype)) |
5cada957 | 5432 | { |
a53aa046 | 5433 | /* The receiver is of type 'id' or 'Class' (with or without some |
5434 | protocols attached to it). */ | |
5435 | ||
5436 | /* We set class_tree to the identifier for 'Class' if this is a | |
5437 | class method, and to NULL_TREE if not. */ | |
267785bc | 5438 | class_tree = (IS_CLASS (rtype) ? objc_class_name : NULL_TREE); |
a53aa046 | 5439 | |
5440 | /* 'rprotos' is the list of protocols that the receiver | |
5441 | supports. */ | |
267785bc | 5442 | rprotos = (TYPE_HAS_OBJC_INFO (TREE_TYPE (rtype)) |
5443 | ? TYPE_OBJC_PROTOCOL_LIST (TREE_TYPE (rtype)) | |
5444 | : NULL_TREE); | |
a53aa046 | 5445 | |
5446 | /* We have no information on the type, and we set it to | |
5447 | NULL_TREE. */ | |
267785bc | 5448 | rtype = NULL_TREE; |
5449 | ||
a53aa046 | 5450 | /* If there are any protocols, check that the method we are |
5451 | calling appears in the protocol list. If there are no | |
5452 | protocols, this is a message to 'id' or 'Class' and we accept | |
5453 | any method that exists. */ | |
267785bc | 5454 | if (rprotos) |
5455 | { | |
a53aa046 | 5456 | /* If messaging 'id <Protos>' or 'Class <Proto>', first |
5457 | search in protocols themselves for the method | |
5458 | prototype. */ | |
267785bc | 5459 | method_prototype |
5460 | = lookup_method_in_protocol_list (rprotos, sel_name, | |
5461 | class_tree != NULL_TREE); | |
5462 | ||
a53aa046 | 5463 | /* If messaging 'Class <Proto>' but did not find a class |
5464 | method prototype, search for an instance method instead, | |
5465 | and warn about having done so. */ | |
267785bc | 5466 | if (!method_prototype && !rtype && class_tree != NULL_TREE) |
5467 | { | |
5468 | method_prototype | |
5469 | = lookup_method_in_protocol_list (rprotos, sel_name, 0); | |
5470 | ||
5471 | if (method_prototype) | |
5472 | warning (0, "found %<-%E%> instead of %<+%E%> in protocol(s)", | |
5473 | sel_name, sel_name); | |
5474 | } | |
5475 | } | |
5cada957 | 5476 | } |
267785bc | 5477 | else if (rtype) |
5cada957 | 5478 | { |
a53aa046 | 5479 | /* We have a receiver type which is more specific than 'id' or |
5480 | 'Class'. */ | |
267785bc | 5481 | tree orig_rtype = rtype; |
5cada957 | 5482 | |
267785bc | 5483 | if (TREE_CODE (rtype) == POINTER_TYPE) |
5484 | rtype = TREE_TYPE (rtype); | |
5485 | /* Traverse typedef aliases */ | |
5486 | while (TREE_CODE (rtype) == RECORD_TYPE && OBJC_TYPE_NAME (rtype) | |
5487 | && TREE_CODE (OBJC_TYPE_NAME (rtype)) == TYPE_DECL | |
5488 | && DECL_ORIGINAL_TYPE (OBJC_TYPE_NAME (rtype))) | |
5489 | rtype = DECL_ORIGINAL_TYPE (OBJC_TYPE_NAME (rtype)); | |
5490 | if (TYPED_OBJECT (rtype)) | |
5491 | { | |
5492 | rprotos = TYPE_OBJC_PROTOCOL_LIST (rtype); | |
5493 | rtype = TYPE_OBJC_INTERFACE (rtype); | |
5494 | } | |
267785bc | 5495 | if (!rtype || TREE_CODE (rtype) == IDENTIFIER_NODE) |
5496 | { | |
a53aa046 | 5497 | /* If we could not find an @interface declaration, we must |
5498 | have only seen a @class declaration; so, we cannot say | |
5499 | anything more intelligent about which methods the | |
5500 | receiver will understand. Note that this only happens | |
5501 | for instance methods; for class methods to a class where | |
5502 | we have only seen a @class declaration, | |
5503 | lookup_interface() above would have set rtype to | |
5504 | NULL_TREE. */ | |
5505 | if (rprotos) | |
5506 | { | |
5507 | /* We could not find an @interface declaration, yet, if | |
5508 | there are protocols attached to the type, we can | |
5509 | still look up the method in the protocols. Ie, we | |
5510 | are in the following case: | |
5511 | ||
5512 | @class MyClass; | |
5513 | MyClass<MyProtocol> *x; | |
5514 | [x method]; | |
5515 | ||
5516 | If 'MyProtocol' has the method 'method', we can check | |
5517 | and retrieve the method prototype. */ | |
5518 | method_prototype | |
5519 | = lookup_method_in_protocol_list (rprotos, sel_name, 0); | |
5520 | ||
5521 | /* At this point, if we have found the method_prototype, | |
5522 | we are quite happy. The details of the class are | |
5523 | irrelevant. If we haven't found it, a warning will | |
5524 | have been produced that the method could not be found | |
5525 | in the protocol, and we won't produce further | |
5526 | warnings (please note that this means that "@class | |
5527 | MyClass; MyClass <MyProtocol> *x;" is exactly | |
5528 | equivalent to "id <MyProtocol> x", which isn't too | |
5529 | satisfactory but it's not easy to see how to do | |
5530 | better). */ | |
5531 | } | |
5532 | else | |
5533 | { | |
5534 | if (rtype) | |
5535 | { | |
5536 | /* We could not find an @interface declaration, and | |
5537 | there are no protocols attached to the receiver, | |
5538 | so we can't complete the check that the receiver | |
5539 | responds to the method, and we can't retrieve the | |
5540 | method prototype. But, because the receiver has | |
5541 | a well-specified class, the programmer did want | |
5542 | this check to be performed. Emit a warning, then | |
5543 | keep going as if it was an 'id'. To remove the | |
5544 | warning, either include an @interface for the | |
5545 | class, or cast the receiver to 'id'. Note that | |
5546 | rtype is an IDENTIFIER_NODE at this point. */ | |
5547 | warning (0, "@interface of class %qE not found", rtype); | |
5548 | } | |
5549 | } | |
5550 | ||
267785bc | 5551 | rtype = NULL_TREE; |
267785bc | 5552 | } |
5553 | else if (TREE_CODE (rtype) == CLASS_INTERFACE_TYPE | |
5554 | || TREE_CODE (rtype) == CLASS_IMPLEMENTATION_TYPE) | |
5555 | { | |
a53aa046 | 5556 | /* We have a valid ObjC class name with an associated |
5557 | @interface. Look up the method name in the published | |
5558 | @interface for the class (and its superclasses). */ | |
267785bc | 5559 | method_prototype |
5560 | = lookup_method_static (rtype, sel_name, class_tree != NULL_TREE); | |
5cada957 | 5561 | |
267785bc | 5562 | /* If the method was not found in the @interface, it may still |
5563 | exist locally as part of the @implementation. */ | |
5564 | if (!method_prototype && objc_implementation_context | |
5565 | && CLASS_NAME (objc_implementation_context) | |
5566 | == OBJC_TYPE_NAME (rtype)) | |
5567 | method_prototype | |
5568 | = lookup_method | |
5569 | ((class_tree | |
5570 | ? CLASS_CLS_METHODS (objc_implementation_context) | |
5571 | : CLASS_NST_METHODS (objc_implementation_context)), | |
5572 | sel_name); | |
5cada957 | 5573 | |
267785bc | 5574 | /* If we haven't found a candidate method by now, try looking for |
5575 | it in the protocol list. */ | |
5576 | if (!method_prototype && rprotos) | |
5577 | method_prototype | |
5578 | = lookup_method_in_protocol_list (rprotos, sel_name, | |
5579 | class_tree != NULL_TREE); | |
5580 | } | |
5581 | else | |
5582 | { | |
a53aa046 | 5583 | /* We have a type, but it's not an Objective-C type (!). */ |
267785bc | 5584 | warning (0, "invalid receiver type %qs", |
5585 | identifier_to_locale (gen_type_name (orig_rtype))); | |
5586 | /* After issuing the "invalid receiver" warning, perform method | |
5587 | lookup as if we were messaging 'id'. */ | |
5588 | rtype = rprotos = NULL_TREE; | |
5589 | } | |
5cada957 | 5590 | } |
a53aa046 | 5591 | /* Note that rtype could also be NULL_TREE. This happens if we are |
5592 | messaging a class by name, but the class was only | |
5593 | forward-declared using @class. */ | |
c17b85ea | 5594 | |
a53aa046 | 5595 | /* For 'id' or 'Class' receivers, search in the global hash table as |
5596 | a last resort. For all receivers, warn if protocol searches have | |
5597 | failed. */ | |
267785bc | 5598 | if (!method_prototype) |
5599 | { | |
5600 | if (rprotos) | |
5601 | warning (0, "%<%c%E%> not found in protocol(s)", | |
5602 | (class_tree ? '+' : '-'), | |
5603 | sel_name); | |
c17b85ea | 5604 | |
267785bc | 5605 | if (!rtype) |
5606 | method_prototype | |
5607 | = lookup_method_in_hash_lists (sel_name, class_tree != NULL_TREE); | |
5608 | } | |
c17b85ea | 5609 | |
6bbb4715 | 5610 | if (!method_prototype) |
267785bc | 5611 | { |
5612 | static bool warn_missing_methods = false; | |
c17b85ea | 5613 | |
267785bc | 5614 | if (rtype) |
5615 | warning (0, "%qE may not respond to %<%c%E%>", | |
5616 | OBJC_TYPE_NAME (rtype), | |
5617 | (class_tree ? '+' : '-'), | |
5618 | sel_name); | |
5619 | /* If we are messaging an 'id' or 'Class' object and made it here, | |
5620 | then we have failed to find _any_ instance or class method, | |
5621 | respectively. */ | |
5622 | else | |
5623 | warning (0, "no %<%c%E%> method found", | |
5624 | (class_tree ? '+' : '-'), | |
5625 | sel_name); | |
0ced0389 | 5626 | |
267785bc | 5627 | if (!warn_missing_methods) |
5628 | { | |
6bbb4715 | 5629 | warning_at (input_location, |
267785bc | 5630 | 0, "(Messages without a matching method signature"); |
6bbb4715 | 5631 | warning_at (input_location, |
267785bc | 5632 | 0, "will be assumed to return %<id%> and accept"); |
6bbb4715 | 5633 | warning_at (input_location, |
267785bc | 5634 | 0, "%<...%> as arguments.)"); |
5635 | warn_missing_methods = true; | |
5636 | } | |
5637 | } | |
5638 | else | |
5639 | { | |
5640 | /* Warn if the method is deprecated, but not if the receiver is | |
5641 | a generic 'id'. 'id' is used to cast an object to a generic | |
5642 | object of an unspecified class; in that case, we'll use | |
5643 | whatever method prototype we can find to get the method | |
5644 | argument and return types, but it is not appropriate to | |
5645 | produce deprecation warnings since we don't know the class | |
5646 | that the object will be of at runtime. The @interface(s) for | |
5647 | that class may not even be available to the compiler right | |
5648 | now, and it is perfectly possible that the method is marked | |
5649 | as non-deprecated in such @interface(s). | |
c450c529 | 5650 | |
267785bc | 5651 | In practice this makes sense since casting an object to 'id' |
5652 | is often used precisely to turn off warnings associated with | |
5653 | the object being of a particular class. */ | |
5654 | if (TREE_DEPRECATED (method_prototype) && rtype != NULL_TREE) | |
5655 | { | |
5656 | if (deprecated_method_prototype) | |
5657 | *deprecated_method_prototype = method_prototype; | |
5658 | else | |
5659 | warn_deprecated_use (method_prototype, NULL_TREE); | |
5660 | } | |
5661 | } | |
e24e8df7 | 5662 | |
267785bc | 5663 | /* Save the selector name for printing error messages. */ |
5664 | current_objc_message_selector = sel_name; | |
e24e8df7 | 5665 | |
267785bc | 5666 | /* Build the method call. |
6bbb4715 | 5667 | TODO: Get the location from somewhere that will work for delayed |
267785bc | 5668 | expansion. */ |
6bbb4715 | 5669 | |
267785bc | 5670 | retval = (*runtime.build_objc_method_call) (input_location, method_prototype, |
5671 | receiver, rtype, sel_name, | |
5672 | method_params, super); | |
e24e8df7 | 5673 | |
267785bc | 5674 | current_objc_message_selector = 0; |
e24e8df7 | 5675 | |
267785bc | 5676 | return retval; |
5677 | } | |
5678 | \f | |
c450c529 | 5679 | |
6bbb4715 | 5680 | /* This routine creates a static variable used to implement @protocol(MyProtocol) |
267785bc | 5681 | expression. This variable will be initialized to global protocol_t meta-data |
5682 | pointer. */ | |
c450c529 | 5683 | |
267785bc | 5684 | /* This function is called by the parser when (and only when) a |
5685 | @protocol() expression is found, in order to compile it. */ | |
5686 | tree | |
5687 | objc_build_protocol_expr (tree protoname) | |
5688 | { | |
5689 | tree p = lookup_protocol (protoname, /* warn if deprecated */ true, | |
5690 | /* definition_required */ false); | |
c1cfb0f5 | 5691 | |
267785bc | 5692 | if (!p) |
5693 | { | |
5694 | error ("cannot find protocol declaration for %qE", protoname); | |
5695 | return error_mark_node; | |
c450c529 | 5696 | } |
c450c529 | 5697 | |
267785bc | 5698 | return (*runtime.get_protocol_reference) (input_location, p); |
5699 | } | |
c450c529 | 5700 | |
267785bc | 5701 | /* This function is called by the parser when a @selector() expression |
5702 | is found, in order to compile it. It is only called by the parser | |
5703 | and only to compile a @selector(). LOC is the location of the | |
5704 | @selector. */ | |
5705 | tree | |
5706 | objc_build_selector_expr (location_t loc, tree selnamelist) | |
c450c529 | 5707 | { |
267785bc | 5708 | tree selname; |
c450c529 | 5709 | |
267785bc | 5710 | /* Obtain the full selector name. */ |
5711 | switch (TREE_CODE (selnamelist)) | |
5712 | { | |
5713 | case IDENTIFIER_NODE: | |
5714 | /* A unary selector. */ | |
5715 | selname = selnamelist; | |
5716 | break; | |
5717 | case TREE_LIST: | |
5718 | selname = build_keyword_selector (selnamelist); | |
5719 | break; | |
5720 | default: | |
5721 | gcc_unreachable (); | |
5722 | } | |
c450c529 | 5723 | |
267785bc | 5724 | /* If we are required to check @selector() expressions as they |
5725 | are found, check that the selector has been declared. */ | |
5726 | if (warn_undeclared_selector) | |
5727 | { | |
5728 | /* Look the selector up in the list of all known class and | |
5729 | instance methods (up to this line) to check that the selector | |
5730 | exists. */ | |
f41791cf | 5731 | tree method; |
c450c529 | 5732 | |
267785bc | 5733 | /* First try with instance methods. */ |
f41791cf | 5734 | method = objc_map_get (instance_method_map, selname); |
c450c529 | 5735 | |
267785bc | 5736 | /* If not found, try with class methods. */ |
f41791cf | 5737 | if (method == OBJC_MAP_NOT_FOUND) |
267785bc | 5738 | { |
f41791cf | 5739 | method = objc_map_get (class_method_map, selname); |
c450c529 | 5740 | |
f41791cf | 5741 | /* If still not found, print out a warning. */ |
5742 | if (method == OBJC_MAP_NOT_FOUND) | |
5743 | warning (0, "undeclared selector %qE", selname); | |
267785bc | 5744 | } |
5745 | } | |
c450c529 | 5746 | |
267785bc | 5747 | /* The runtimes do this differently, most particularly, GNU has typed |
5748 | selectors, whilst NeXT does not. */ | |
5749 | return (*runtime.build_selector_reference) (loc, selname, NULL_TREE); | |
c450c529 | 5750 | } |
5751 | ||
267785bc | 5752 | static tree |
5753 | build_ivar_reference (tree id) | |
5754 | { | |
5755 | tree base; | |
5756 | if (TREE_CODE (objc_method_context) == CLASS_METHOD_DECL) | |
5757 | { | |
5758 | /* Historically, a class method that produced objects (factory | |
5759 | method) would assign `self' to the instance that it | |
5760 | allocated. This would effectively turn the class method into | |
5761 | an instance method. Following this assignment, the instance | |
5762 | variables could be accessed. That practice, while safe, | |
5763 | violates the simple rule that a class method should not refer | |
5764 | to an instance variable. It's better to catch the cases | |
5765 | where this is done unknowingly than to support the above | |
5766 | paradigm. */ | |
5767 | warning (0, "instance variable %qE accessed in class method", | |
5768 | id); | |
5769 | self_decl = convert (objc_instance_type, self_decl); /* cast */ | |
c450c529 | 5770 | } |
c450c529 | 5771 | |
267785bc | 5772 | base = build_indirect_ref (input_location, self_decl, RO_ARROW); |
5773 | return (*runtime.build_ivar_reference) (input_location, base, id); | |
c450c529 | 5774 | } |
5775 | ||
267785bc | 5776 | static void |
5777 | hash_init (void) | |
5778 | { | |
f41791cf | 5779 | instance_method_map = objc_map_alloc_ggc (1000); |
5780 | class_method_map = objc_map_alloc_ggc (1000); | |
c450c529 | 5781 | |
f41791cf | 5782 | class_name_map = objc_map_alloc_ggc (200); |
5783 | alias_name_map = objc_map_alloc_ggc (200); | |
c450c529 | 5784 | |
267785bc | 5785 | /* Initialize the hash table used to hold the constant string objects. */ |
2ef51f0e | 5786 | string_htab = hash_table<objc_string_hasher>::create_ggc (31); |
c450c529 | 5787 | } |
5788 | ||
f41791cf | 5789 | /* Use the following to add a method to class_method_map or |
5790 | instance_method_map. It will add the method, keyed by the | |
5791 | METHOD_SEL_NAME. If the method already exists, but with one or | |
5792 | more different prototypes, it will store a TREE_VEC in the map, | |
5793 | with the method prototypes in the vector. */ | |
267785bc | 5794 | static void |
f41791cf | 5795 | insert_method_into_method_map (bool class_method, tree method) |
267785bc | 5796 | { |
f41791cf | 5797 | tree method_name = METHOD_SEL_NAME (method); |
5798 | tree existing_entry; | |
5799 | objc_map_t map; | |
c450c529 | 5800 | |
f41791cf | 5801 | if (class_method) |
5802 | map = class_method_map; | |
267785bc | 5803 | else |
f41791cf | 5804 | map = instance_method_map; |
c450c529 | 5805 | |
f41791cf | 5806 | /* Check if the method already exists in the map. */ |
5807 | existing_entry = objc_map_get (map, method_name); | |
267785bc | 5808 | |
f41791cf | 5809 | /* If not, we simply add it to the map. */ |
5810 | if (existing_entry == OBJC_MAP_NOT_FOUND) | |
5811 | objc_map_put (map, method_name, method); | |
5812 | else | |
267785bc | 5813 | { |
f41791cf | 5814 | tree new_entry; |
5815 | ||
5816 | /* If an entry already exists, it's more complicated. We'll | |
5817 | have to check whether the method prototype is the same or | |
5818 | not. */ | |
5819 | if (TREE_CODE (existing_entry) != TREE_VEC) | |
5820 | { | |
5821 | /* If the method prototypes are the same, there is nothing | |
5822 | to do. */ | |
5823 | if (comp_proto_with_proto (method, existing_entry, 1)) | |
5824 | return; | |
267785bc | 5825 | |
f41791cf | 5826 | /* If not, create a vector to store both the method already |
5827 | in the map, and the new one that we are adding. */ | |
5828 | new_entry = make_tree_vec (2); | |
5829 | ||
5830 | TREE_VEC_ELT (new_entry, 0) = existing_entry; | |
5831 | TREE_VEC_ELT (new_entry, 1) = method; | |
5832 | } | |
5833 | else | |
5834 | { | |
5835 | /* An entry already exists, and it's already a vector. This | |
5836 | means that at least 2 different method prototypes were | |
5837 | already found, and we're considering registering yet | |
5838 | another one. */ | |
5839 | size_t i; | |
5840 | ||
5841 | /* Check all the existing prototypes. If any matches the | |
5842 | one we need to add, there is nothing to do because it's | |
5843 | already there. */ | |
d69c64b7 | 5844 | for (i = 0; i < (size_t) TREE_VEC_LENGTH (existing_entry); i++) |
f41791cf | 5845 | if (comp_proto_with_proto (method, TREE_VEC_ELT (existing_entry, i), 1)) |
5846 | return; | |
267785bc | 5847 | |
f41791cf | 5848 | /* Else, create a new, bigger vector and add the new method |
5849 | at the end of it. This is inefficient but extremely | |
5850 | rare; in any sane program most methods have a single | |
5851 | prototype, and very few, if any, will have more than | |
5852 | 2! */ | |
5853 | new_entry = make_tree_vec (TREE_VEC_LENGTH (existing_entry) + 1); | |
5854 | ||
5855 | /* Copy the methods from the existing vector. */ | |
d69c64b7 | 5856 | for (i = 0; i < (size_t) TREE_VEC_LENGTH (existing_entry); i++) |
f41791cf | 5857 | TREE_VEC_ELT (new_entry, i) = TREE_VEC_ELT (existing_entry, i); |
5858 | ||
5859 | /* Add the new method at the end. */ | |
5860 | TREE_VEC_ELT (new_entry, i) = method; | |
5861 | } | |
c450c529 | 5862 | |
f41791cf | 5863 | /* Store the new vector in the map. */ |
5864 | objc_map_put (map, method_name, new_entry); | |
c450c529 | 5865 | } |
267785bc | 5866 | } |
c450c529 | 5867 | |
267785bc | 5868 | \f |
5869 | static tree | |
5870 | lookup_method (tree mchain, tree method) | |
5871 | { | |
5872 | tree key; | |
c450c529 | 5873 | |
267785bc | 5874 | if (TREE_CODE (method) == IDENTIFIER_NODE) |
5875 | key = method; | |
5876 | else | |
5877 | key = METHOD_SEL_NAME (method); | |
c450c529 | 5878 | |
267785bc | 5879 | while (mchain) |
5880 | { | |
5881 | if (METHOD_SEL_NAME (mchain) == key) | |
5882 | return mchain; | |
39b8ddc6 | 5883 | |
267785bc | 5884 | mchain = DECL_CHAIN (mchain); |
c450c529 | 5885 | } |
267785bc | 5886 | return NULL_TREE; |
c450c529 | 5887 | } |
5888 | ||
267785bc | 5889 | /* Look up a class (if OBJC_LOOKUP_CLASS is set in FLAGS) or instance |
5890 | method in INTERFACE, along with any categories and protocols | |
5891 | attached thereto. If method is not found, and the | |
5892 | OBJC_LOOKUP_NO_SUPER is _not_ set in FLAGS, recursively examine the | |
5893 | INTERFACE's superclass. If OBJC_LOOKUP_CLASS is set, | |
5894 | OBJC_LOOKUP_NO_SUPER is clear, and no suitable class method could | |
5895 | be found in INTERFACE or any of its superclasses, look for an | |
5896 | _instance_ method of the same name in the root class as a last | |
5897 | resort. This behaviour can be turned off by using | |
5898 | OBJC_LOOKUP_NO_INSTANCE_METHODS_OF_ROOT_CLASS. | |
c450c529 | 5899 | |
267785bc | 5900 | If a suitable method cannot be found, return NULL_TREE. */ |
c450c529 | 5901 | |
267785bc | 5902 | static tree |
5903 | lookup_method_static (tree interface, tree ident, int flags) | |
5904 | { | |
5905 | tree meth = NULL_TREE, root_inter = NULL_TREE; | |
5906 | tree inter = interface; | |
5907 | int is_class = (flags & OBJC_LOOKUP_CLASS); | |
5908 | int no_superclasses = (flags & OBJC_LOOKUP_NO_SUPER); | |
5909 | int no_instance_methods_of_root_class = (flags & OBJC_LOOKUP_NO_INSTANCE_METHODS_OF_ROOT_CLASS); | |
c450c529 | 5910 | |
267785bc | 5911 | while (inter) |
5912 | { | |
5913 | tree chain = is_class ? CLASS_CLS_METHODS (inter) : CLASS_NST_METHODS (inter); | |
5914 | tree category = inter; | |
c450c529 | 5915 | |
267785bc | 5916 | /* First, look up the method in the class itself. */ |
5917 | if ((meth = lookup_method (chain, ident))) | |
5918 | return meth; | |
c450c529 | 5919 | |
267785bc | 5920 | /* Failing that, look for the method in each category of the class. */ |
5921 | while ((category = CLASS_CATEGORY_LIST (category))) | |
5922 | { | |
5923 | chain = is_class ? CLASS_CLS_METHODS (category) : CLASS_NST_METHODS (category); | |
c450c529 | 5924 | |
267785bc | 5925 | /* Check directly in each category. */ |
5926 | if ((meth = lookup_method (chain, ident))) | |
5927 | return meth; | |
c450c529 | 5928 | |
267785bc | 5929 | /* Failing that, check in each category's protocols. */ |
5930 | if (CLASS_PROTOCOL_LIST (category)) | |
5931 | { | |
5932 | if ((meth = (lookup_method_in_protocol_list | |
5933 | (CLASS_PROTOCOL_LIST (category), ident, is_class)))) | |
5934 | return meth; | |
5935 | } | |
5936 | } | |
c450c529 | 5937 | |
267785bc | 5938 | /* If not found in categories, check in protocols of the main class. */ |
5939 | if (CLASS_PROTOCOL_LIST (inter)) | |
5940 | { | |
5941 | if ((meth = (lookup_method_in_protocol_list | |
5942 | (CLASS_PROTOCOL_LIST (inter), ident, is_class)))) | |
5943 | return meth; | |
5944 | } | |
c450c529 | 5945 | |
267785bc | 5946 | /* If we were instructed not to look in superclasses, don't. */ |
5947 | if (no_superclasses) | |
5948 | return NULL_TREE; | |
6a9006c3 | 5949 | |
267785bc | 5950 | /* Failing that, climb up the inheritance hierarchy. */ |
5951 | root_inter = inter; | |
5952 | inter = lookup_interface (CLASS_SUPER_NAME (inter)); | |
c450c529 | 5953 | } |
267785bc | 5954 | while (inter); |
c450c529 | 5955 | |
267785bc | 5956 | if (is_class && !no_instance_methods_of_root_class) |
c450c529 | 5957 | { |
267785bc | 5958 | /* If no class (factory) method was found, check if an _instance_ |
5959 | method of the same name exists in the root class. This is what | |
5960 | the Objective-C runtime will do. */ | |
5961 | return lookup_method_static (root_inter, ident, 0); | |
c450c529 | 5962 | } |
5963 | else | |
267785bc | 5964 | { |
6bbb4715 | 5965 | /* If an instance method was not found, return 0. */ |
267785bc | 5966 | return NULL_TREE; |
5967 | } | |
c450c529 | 5968 | } |
5969 | ||
267785bc | 5970 | static tree |
5971 | objc_add_method (tree klass, tree method, int is_class, bool is_optional) | |
0ced0389 | 5972 | { |
267785bc | 5973 | tree existing_method = NULL_TREE; |
0ced0389 | 5974 | |
267785bc | 5975 | /* The first thing we do is look up the method in the list of |
5976 | methods already defined in the interface (or implementation). */ | |
5977 | if (is_class) | |
5978 | existing_method = lookup_method (CLASS_CLS_METHODS (klass), method); | |
5979 | else | |
5980 | existing_method = lookup_method (CLASS_NST_METHODS (klass), method); | |
0ced0389 | 5981 | |
267785bc | 5982 | /* In the case of protocols, we have a second list of methods to |
5983 | consider, the list of optional ones. */ | |
5984 | if (TREE_CODE (klass) == PROTOCOL_INTERFACE_TYPE) | |
0ced0389 | 5985 | { |
267785bc | 5986 | /* @required methods are added to the protocol's normal list. |
5987 | @optional methods are added to the protocol's OPTIONAL lists. | |
5988 | Note that adding the methods to the optional lists disables | |
5989 | checking that the methods are implemented by classes | |
5990 | implementing the protocol, since these checks only use the | |
5991 | CLASS_CLS_METHODS and CLASS_NST_METHODS. */ | |
0ced0389 | 5992 | |
267785bc | 5993 | /* First of all, if the method to add is @optional, and we found |
5994 | it already existing as @required, emit an error. */ | |
5995 | if (is_optional && existing_method) | |
5996 | { | |
5997 | error ("method %<%c%E%> declared %<@optional%> and %<@required%> at the same time", | |
5998 | (is_class ? '+' : '-'), | |
5999 | METHOD_SEL_NAME (existing_method)); | |
6000 | inform (DECL_SOURCE_LOCATION (existing_method), | |
6001 | "previous declaration of %<%c%E%> as %<@required%>", | |
6002 | (is_class ? '+' : '-'), | |
6003 | METHOD_SEL_NAME (existing_method)); | |
0ced0389 | 6004 | } |
0ced0389 | 6005 | |
267785bc | 6006 | /* Now check the list of @optional methods if we didn't find the |
6007 | method in the @required list. */ | |
6008 | if (!existing_method) | |
0ced0389 | 6009 | { |
267785bc | 6010 | if (is_class) |
6011 | existing_method = lookup_method (PROTOCOL_OPTIONAL_CLS_METHODS (klass), method); | |
6012 | else | |
6013 | existing_method = lookup_method (PROTOCOL_OPTIONAL_NST_METHODS (klass), method); | |
6bbb4715 | 6014 | |
267785bc | 6015 | if (!is_optional && existing_method) |
0ced0389 | 6016 | { |
267785bc | 6017 | error ("method %<%c%E%> declared %<@optional%> and %<@required%> at the same time", |
6018 | (is_class ? '+' : '-'), | |
6019 | METHOD_SEL_NAME (existing_method)); | |
6020 | inform (DECL_SOURCE_LOCATION (existing_method), | |
6021 | "previous declaration of %<%c%E%> as %<@optional%>", | |
6022 | (is_class ? '+' : '-'), | |
6023 | METHOD_SEL_NAME (existing_method)); | |
0ced0389 | 6024 | } |
6025 | } | |
6026 | } | |
6027 | ||
267785bc | 6028 | /* If the method didn't exist already, add it. */ |
6029 | if (!existing_method) | |
fc304191 | 6030 | { |
267785bc | 6031 | if (is_optional) |
c450c529 | 6032 | { |
267785bc | 6033 | if (is_class) |
6034 | { | |
6035 | /* Put the method on the list in reverse order. */ | |
6036 | TREE_CHAIN (method) = PROTOCOL_OPTIONAL_CLS_METHODS (klass); | |
6037 | PROTOCOL_OPTIONAL_CLS_METHODS (klass) = method; | |
6038 | } | |
6039 | else | |
146a801c | 6040 | { |
267785bc | 6041 | TREE_CHAIN (method) = PROTOCOL_OPTIONAL_NST_METHODS (klass); |
6042 | PROTOCOL_OPTIONAL_NST_METHODS (klass) = method; | |
146a801c | 6043 | } |
c450c529 | 6044 | } |
267785bc | 6045 | else |
c450c529 | 6046 | { |
267785bc | 6047 | if (is_class) |
6048 | { | |
6049 | DECL_CHAIN (method) = CLASS_CLS_METHODS (klass); | |
6050 | CLASS_CLS_METHODS (klass) = method; | |
6051 | } | |
6052 | else | |
146a801c | 6053 | { |
267785bc | 6054 | DECL_CHAIN (method) = CLASS_NST_METHODS (klass); |
6055 | CLASS_NST_METHODS (klass) = method; | |
146a801c | 6056 | } |
c450c529 | 6057 | } |
fc304191 | 6058 | } |
c450c529 | 6059 | else |
fc304191 | 6060 | { |
267785bc | 6061 | /* The method was already defined. Check that the types match |
6062 | for an @interface for a class or category, or for a | |
6063 | @protocol. Give hard errors on methods with identical | |
6064 | selectors but differing argument and/or return types. We do | |
6065 | not do this for @implementations, because C/C++ will do it | |
6066 | for us (i.e., there will be duplicate function definition | |
6067 | errors). */ | |
6068 | if ((TREE_CODE (klass) == CLASS_INTERFACE_TYPE | |
6069 | || TREE_CODE (klass) == CATEGORY_INTERFACE_TYPE | |
6070 | /* Starting with GCC 4.6, we emit the same error for | |
6071 | protocols too. The situation is identical to | |
6072 | @interfaces as there is no possible meaningful reason | |
6073 | for defining the same method with different signatures | |
6074 | in the very same @protocol. If that was allowed, | |
6075 | whenever the protocol is used (both at compile and run | |
6076 | time) there wouldn't be any meaningful way to decide | |
6077 | which of the two method signatures should be used. */ | |
6078 | || TREE_CODE (klass) == PROTOCOL_INTERFACE_TYPE) | |
6079 | && !comp_proto_with_proto (method, existing_method, 1)) | |
6080 | { | |
6081 | error ("duplicate declaration of method %<%c%E%> with conflicting types", | |
6082 | (is_class ? '+' : '-'), | |
6083 | METHOD_SEL_NAME (existing_method)); | |
6084 | inform (DECL_SOURCE_LOCATION (existing_method), | |
6085 | "previous declaration of %<%c%E%>", | |
6086 | (is_class ? '+' : '-'), | |
6087 | METHOD_SEL_NAME (existing_method)); | |
6088 | } | |
fc304191 | 6089 | } |
e0ece38e | 6090 | |
267785bc | 6091 | if (is_class) |
f41791cf | 6092 | insert_method_into_method_map (true, method); |
fc304191 | 6093 | else |
6094 | { | |
f41791cf | 6095 | insert_method_into_method_map (false, method); |
267785bc | 6096 | |
6097 | /* Instance methods in root classes (and categories thereof) | |
6098 | may act as class methods as a last resort. We also add | |
6099 | instance methods listed in @protocol declarations to | |
6100 | the class hash table, on the assumption that @protocols | |
6101 | may be adopted by root classes or categories. */ | |
6102 | if (TREE_CODE (klass) == CATEGORY_INTERFACE_TYPE | |
6103 | || TREE_CODE (klass) == CATEGORY_IMPLEMENTATION_TYPE) | |
6104 | klass = lookup_interface (CLASS_NAME (klass)); | |
6105 | ||
6106 | if (TREE_CODE (klass) == PROTOCOL_INTERFACE_TYPE | |
6107 | || !CLASS_SUPER_NAME (klass)) | |
f41791cf | 6108 | insert_method_into_method_map (true, method); |
fc304191 | 6109 | } |
e0ece38e | 6110 | |
267785bc | 6111 | return method; |
fc304191 | 6112 | } |
6113 | ||
146a801c | 6114 | static void |
267785bc | 6115 | add_category (tree klass, tree category) |
146a801c | 6116 | { |
267785bc | 6117 | /* Put categories on list in reverse order. */ |
6118 | tree cat = lookup_category (klass, CLASS_SUPER_NAME (category)); | |
fc304191 | 6119 | |
267785bc | 6120 | if (cat) |
c450c529 | 6121 | { |
267785bc | 6122 | warning (0, "duplicate interface declaration for category %<%E(%E)%>", |
6123 | CLASS_NAME (klass), | |
6124 | CLASS_SUPER_NAME (category)); | |
c450c529 | 6125 | } |
6126 | else | |
6127 | { | |
267785bc | 6128 | CLASS_CATEGORY_LIST (category) = CLASS_CATEGORY_LIST (klass); |
6129 | CLASS_CATEGORY_LIST (klass) = category; | |
c17b85ea | 6130 | } |
fc304191 | 6131 | } |
6132 | ||
7840e94f | 6133 | #ifndef OBJCPLUS |
6134 | /* A flexible array member is a C99 extension where you can use | |
6135 | "type[]" at the end of a struct to mean a variable-length array. | |
6136 | ||
6137 | In Objective-C, instance variables are fundamentally members of a | |
6138 | struct, but the struct can always be extended by subclassing; hence | |
6139 | we need to detect and forbid all instance variables declared using | |
6140 | flexible array members. | |
6141 | ||
6142 | No check for this is needed in Objective-C++, since C++ does not | |
6143 | have flexible array members. */ | |
6144 | ||
6145 | /* Determine whether TYPE is a structure with a flexible array member, | |
6146 | a union containing such a structure (possibly recursively) or an | |
6147 | array of such structures or unions. These are all invalid as | |
6148 | instance variable. */ | |
6149 | static bool | |
6150 | flexible_array_type_p (tree type) | |
6151 | { | |
6152 | tree x; | |
6153 | switch (TREE_CODE (type)) | |
6154 | { | |
6155 | case RECORD_TYPE: | |
6156 | x = TYPE_FIELDS (type); | |
6157 | if (x == NULL_TREE) | |
6158 | return false; | |
6159 | while (DECL_CHAIN (x) != NULL_TREE) | |
6160 | x = DECL_CHAIN (x); | |
6161 | if (TREE_CODE (TREE_TYPE (x)) == ARRAY_TYPE | |
6162 | && TYPE_SIZE (TREE_TYPE (x)) == NULL_TREE | |
6163 | && TYPE_DOMAIN (TREE_TYPE (x)) != NULL_TREE | |
6164 | && TYPE_MAX_VALUE (TYPE_DOMAIN (TREE_TYPE (x))) == NULL_TREE) | |
6165 | return true; | |
6166 | return false; | |
6167 | case UNION_TYPE: | |
6168 | for (x = TYPE_FIELDS (type); x != NULL_TREE; x = DECL_CHAIN (x)) | |
6169 | { | |
6170 | if (flexible_array_type_p (TREE_TYPE (x))) | |
6171 | return true; | |
6172 | } | |
6173 | return false; | |
6174 | /* Note that we also check for arrays of something that uses a flexible array member. */ | |
6175 | case ARRAY_TYPE: | |
6176 | if (flexible_array_type_p (TREE_TYPE (type))) | |
6177 | return true; | |
6178 | return false; | |
6179 | default: | |
6180 | return false; | |
6181 | } | |
6182 | } | |
6183 | #endif | |
6184 | ||
cc79dae3 | 6185 | /* Produce a printable version of an ivar name. This is only used |
6186 | inside add_instance_variable. */ | |
6187 | static const char * | |
6188 | printable_ivar_name (tree field_decl) | |
6189 | { | |
6190 | if (DECL_NAME (field_decl)) | |
6191 | return identifier_to_locale (IDENTIFIER_POINTER (DECL_NAME (field_decl))); | |
6192 | else | |
6193 | return _("<unnamed>"); | |
6194 | } | |
6195 | ||
267785bc | 6196 | /* Called after parsing each instance variable declaration. Necessary to |
6197 | preserve typedefs and implement public/private... | |
fc304191 | 6198 | |
267785bc | 6199 | VISIBILITY is 1 for public, 0 for protected, and 2 for private. */ |
fc304191 | 6200 | |
267785bc | 6201 | static tree |
6bbb4715 | 6202 | add_instance_variable (tree klass, objc_ivar_visibility_kind visibility, |
267785bc | 6203 | tree field_decl) |
fc304191 | 6204 | { |
267785bc | 6205 | tree field_type = TREE_TYPE (field_decl); |
fc304191 | 6206 | |
267785bc | 6207 | #ifdef OBJCPLUS |
6208 | if (TREE_CODE (field_type) == REFERENCE_TYPE) | |
6209 | { | |
6210 | error ("illegal reference type specified for instance variable %qs", | |
cc79dae3 | 6211 | printable_ivar_name (field_decl)); |
267785bc | 6212 | /* Return class as is without adding this ivar. */ |
6213 | return klass; | |
6214 | } | |
6215 | #endif | |
fc304191 | 6216 | |
267785bc | 6217 | if (field_type == error_mark_node || !TYPE_SIZE (field_type) |
6218 | || TYPE_SIZE (field_type) == error_mark_node) | |
6219 | /* 'type[0]' is allowed, but 'type[]' is not! */ | |
fc304191 | 6220 | { |
cc79dae3 | 6221 | error ("instance variable %qs has unknown size", |
6222 | printable_ivar_name (field_decl)); | |
267785bc | 6223 | /* Return class as is without adding this ivar. */ |
6224 | return klass; | |
6225 | } | |
fc304191 | 6226 | |
7840e94f | 6227 | #ifndef OBJCPLUS |
6228 | /* Also, in C reject a struct with a flexible array member. Ie, | |
6229 | ||
6230 | struct A { int x; int[] y; }; | |
6231 | ||
6232 | @interface X | |
6233 | { | |
6234 | struct A instance_variable; | |
6235 | } | |
6236 | @end | |
6237 | ||
6238 | is not valid because if the class is subclassed, we wouldn't be able | |
6239 | to calculate the offset of the next instance variable. */ | |
6240 | if (flexible_array_type_p (field_type)) | |
6241 | { | |
cc79dae3 | 6242 | error ("instance variable %qs uses flexible array member", |
6243 | printable_ivar_name (field_decl)); | |
7840e94f | 6244 | /* Return class as is without adding this ivar. */ |
6bbb4715 | 6245 | return klass; |
7840e94f | 6246 | } |
6247 | #endif | |
6248 | ||
c17b85ea | 6249 | #ifdef OBJCPLUS |
267785bc | 6250 | /* Check if the ivar being added has a non-POD C++ type. If so, we will |
6251 | need to either (1) warn the user about it or (2) generate suitable | |
6252 | constructor/destructor call from '- .cxx_construct' or '- .cxx_destruct' | |
6253 | methods (if '-fobjc-call-cxx-cdtors' was specified). */ | |
6254 | if (MAYBE_CLASS_TYPE_P (field_type) | |
6255 | && (TYPE_NEEDS_CONSTRUCTING (field_type) | |
6256 | || TYPE_HAS_NONTRIVIAL_DESTRUCTOR (field_type) | |
6257 | || TYPE_POLYMORPHIC_P (field_type))) | |
6258 | { | |
6259 | tree type_name = OBJC_TYPE_NAME (field_type); | |
e0ece38e | 6260 | |
267785bc | 6261 | if (flag_objc_call_cxx_cdtors) |
6262 | { | |
6263 | /* Since the ObjC runtime will be calling the constructors and | |
6264 | destructors for us, the only thing we can't handle is the lack | |
6265 | of a default constructor. */ | |
6266 | if (TYPE_NEEDS_CONSTRUCTING (field_type) | |
6267 | && !TYPE_HAS_DEFAULT_CONSTRUCTOR (field_type)) | |
6268 | { | |
6269 | warning (0, "type %qE has no default constructor to call", | |
6270 | type_name); | |
fc304191 | 6271 | |
267785bc | 6272 | /* If we cannot call a constructor, we should also avoid |
6273 | calling the destructor, for symmetry. */ | |
6274 | if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (field_type)) | |
6275 | warning (0, "destructor for %qE shall not be run either", | |
6276 | type_name); | |
6277 | } | |
6278 | } | |
6279 | else | |
fc304191 | 6280 | { |
267785bc | 6281 | static bool warn_cxx_ivars = false; |
6282 | ||
6283 | if (TYPE_POLYMORPHIC_P (field_type)) | |
fc304191 | 6284 | { |
267785bc | 6285 | /* Vtable pointers are Real Bad(tm), since Obj-C cannot |
6286 | initialize them. */ | |
6287 | error ("type %qE has virtual member functions", type_name); | |
6288 | error ("illegal aggregate type %qE specified " | |
6289 | "for instance variable %qs", | |
cc79dae3 | 6290 | type_name, printable_ivar_name (field_decl)); |
267785bc | 6291 | /* Return class as is without adding this ivar. */ |
6292 | return klass; | |
fc304191 | 6293 | } |
267785bc | 6294 | |
6295 | /* User-defined constructors and destructors are not known to Obj-C | |
6296 | and hence will not be called. This may or may not be a problem. */ | |
6297 | if (TYPE_NEEDS_CONSTRUCTING (field_type)) | |
6298 | warning (0, "type %qE has a user-defined constructor", type_name); | |
6299 | if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (field_type)) | |
6300 | warning (0, "type %qE has a user-defined destructor", type_name); | |
6301 | ||
6302 | if (!warn_cxx_ivars) | |
fc304191 | 6303 | { |
267785bc | 6304 | warning (0, "C++ constructors and destructors will not " |
6305 | "be invoked for Objective-C fields"); | |
6306 | warn_cxx_ivars = true; | |
fc304191 | 6307 | } |
6308 | } | |
fc304191 | 6309 | } |
267785bc | 6310 | #endif |
fc304191 | 6311 | |
267785bc | 6312 | /* Overload the public attribute, it is not used for FIELD_DECLs. */ |
6313 | switch (visibility) | |
6314 | { | |
6315 | case OBJC_IVAR_VIS_PROTECTED: | |
6316 | TREE_PUBLIC (field_decl) = 0; | |
6317 | TREE_PRIVATE (field_decl) = 0; | |
6318 | TREE_PROTECTED (field_decl) = 1; | |
6319 | break; | |
fc304191 | 6320 | |
267785bc | 6321 | case OBJC_IVAR_VIS_PACKAGE: |
6322 | /* TODO: Implement the package variant. */ | |
6323 | case OBJC_IVAR_VIS_PUBLIC: | |
6324 | TREE_PUBLIC (field_decl) = 1; | |
6325 | TREE_PRIVATE (field_decl) = 0; | |
6326 | TREE_PROTECTED (field_decl) = 0; | |
6327 | break; | |
fc304191 | 6328 | |
267785bc | 6329 | case OBJC_IVAR_VIS_PRIVATE: |
6330 | TREE_PUBLIC (field_decl) = 0; | |
6331 | TREE_PRIVATE (field_decl) = 1; | |
6332 | TREE_PROTECTED (field_decl) = 0; | |
6333 | break; | |
fc304191 | 6334 | |
267785bc | 6335 | } |
fc304191 | 6336 | |
267785bc | 6337 | CLASS_RAW_IVARS (klass) = chainon (CLASS_RAW_IVARS (klass), field_decl); |
fc304191 | 6338 | |
267785bc | 6339 | return klass; |
fc304191 | 6340 | } |
6341 | ||
267785bc | 6342 | /* True if the ivar is private and we are not in its implementation. */ |
c450c529 | 6343 | |
267785bc | 6344 | static int |
6345 | is_private (tree decl) | |
fc304191 | 6346 | { |
267785bc | 6347 | return (TREE_PRIVATE (decl) |
6348 | && ! is_ivar (CLASS_IVARS (implementation_template), | |
6349 | DECL_NAME (decl))); | |
fc304191 | 6350 | } |
6351 | ||
cfc77d33 | 6352 | /* Searches all the instance variables of 'klass' and of its |
6353 | superclasses for an instance variable whose name (identifier) is | |
6354 | 'ivar_name_ident'. Return the declaration (DECL) of the instance | |
6355 | variable, if found, or NULL_TREE, if not found. */ | |
6356 | static inline tree | |
6357 | ivar_of_class (tree klass, tree ivar_name_ident) | |
6358 | { | |
6359 | /* First, look up the ivar in CLASS_RAW_IVARS. */ | |
6360 | tree decl_chain = CLASS_RAW_IVARS (klass); | |
6361 | ||
6362 | for ( ; decl_chain; decl_chain = DECL_CHAIN (decl_chain)) | |
6363 | if (DECL_NAME (decl_chain) == ivar_name_ident) | |
6364 | return decl_chain; | |
6365 | ||
6366 | /* If not found, search up the class hierarchy. */ | |
6367 | while (CLASS_SUPER_NAME (klass)) | |
6368 | { | |
6369 | klass = lookup_interface (CLASS_SUPER_NAME (klass)); | |
6bbb4715 | 6370 | |
cfc77d33 | 6371 | decl_chain = CLASS_RAW_IVARS (klass); |
6bbb4715 | 6372 | |
cfc77d33 | 6373 | for ( ; decl_chain; decl_chain = DECL_CHAIN (decl_chain)) |
6374 | if (DECL_NAME (decl_chain) == ivar_name_ident) | |
6375 | return decl_chain; | |
6376 | } | |
6377 | ||
6378 | return NULL_TREE; | |
6379 | } | |
6380 | ||
267785bc | 6381 | /* We have an instance variable reference;, check to see if it is public. */ |
c450c529 | 6382 | |
267785bc | 6383 | int |
6384 | objc_is_public (tree expr, tree identifier) | |
fc304191 | 6385 | { |
267785bc | 6386 | tree basetype, decl; |
fc304191 | 6387 | |
267785bc | 6388 | #ifdef OBJCPLUS |
6389 | if (processing_template_decl) | |
6390 | return 1; | |
6391 | #endif | |
fc304191 | 6392 | |
267785bc | 6393 | if (TREE_TYPE (expr) == error_mark_node) |
6394 | return 1; | |
fc304191 | 6395 | |
267785bc | 6396 | basetype = TYPE_MAIN_VARIANT (TREE_TYPE (expr)); |
fc304191 | 6397 | |
267785bc | 6398 | if (basetype && TREE_CODE (basetype) == RECORD_TYPE) |
6399 | { | |
6400 | if (TYPE_HAS_OBJC_INFO (basetype) && TYPE_OBJC_INTERFACE (basetype)) | |
6401 | { | |
6402 | tree klass = lookup_interface (OBJC_TYPE_NAME (basetype)); | |
fc304191 | 6403 | |
267785bc | 6404 | if (!klass) |
6405 | { | |
6406 | error ("cannot find interface declaration for %qE", | |
6407 | OBJC_TYPE_NAME (basetype)); | |
6408 | return 0; | |
6409 | } | |
fc304191 | 6410 | |
cfc77d33 | 6411 | if ((decl = ivar_of_class (klass, identifier))) |
267785bc | 6412 | { |
6413 | if (TREE_PUBLIC (decl)) | |
6414 | return 1; | |
fc304191 | 6415 | |
267785bc | 6416 | /* Important difference between the Stepstone translator: |
6417 | all instance variables should be public within the context | |
6418 | of the implementation. */ | |
6419 | if (objc_implementation_context | |
6420 | && ((TREE_CODE (objc_implementation_context) | |
6421 | == CLASS_IMPLEMENTATION_TYPE) | |
6422 | || (TREE_CODE (objc_implementation_context) | |
6423 | == CATEGORY_IMPLEMENTATION_TYPE))) | |
6424 | { | |
6425 | tree curtype = TYPE_MAIN_VARIANT | |
6426 | (CLASS_STATIC_TEMPLATE | |
6427 | (implementation_template)); | |
fc304191 | 6428 | |
267785bc | 6429 | if (basetype == curtype |
6430 | || DERIVED_FROM_P (basetype, curtype)) | |
6431 | { | |
6432 | int priv = is_private (decl); | |
fc304191 | 6433 | |
267785bc | 6434 | if (priv) |
6435 | error ("instance variable %qE is declared private", | |
6436 | DECL_NAME (decl)); | |
fc304191 | 6437 | |
267785bc | 6438 | return !priv; |
6439 | } | |
6440 | } | |
fc304191 | 6441 | |
267785bc | 6442 | /* The 2.95.2 compiler sometimes allowed C functions to access |
6443 | non-@public ivars. We will let this slide for now... */ | |
6444 | if (!objc_method_context) | |
6445 | { | |
6446 | warning (0, "instance variable %qE is %s; " | |
6447 | "this will be a hard error in the future", | |
6448 | identifier, | |
6449 | TREE_PRIVATE (decl) ? "@private" : "@protected"); | |
6450 | return 1; | |
6451 | } | |
fc304191 | 6452 | |
267785bc | 6453 | error ("instance variable %qE is declared %s", |
6454 | identifier, | |
6455 | TREE_PRIVATE (decl) ? "private" : "protected"); | |
6456 | return 0; | |
6457 | } | |
6458 | } | |
6459 | } | |
fc304191 | 6460 | |
267785bc | 6461 | return 1; |
fc304191 | 6462 | } |
267785bc | 6463 | \f |
6464 | /* Make sure all methods in CHAIN (a list of method declarations from | |
6465 | an @interface or a @protocol) are in IMPLEMENTATION (the | |
6466 | implementation context). This is used to check for example that | |
6467 | all methods declared in an @interface were implemented in an | |
6468 | @implementation. | |
fc304191 | 6469 | |
267785bc | 6470 | Some special methods (property setters/getters) are special and if |
6471 | they are not found in IMPLEMENTATION, we look them up in its | |
6472 | superclasses. */ | |
df6caf6c | 6473 | |
c17b85ea | 6474 | static int |
267785bc | 6475 | check_methods (tree chain, tree implementation, int mtype) |
fc304191 | 6476 | { |
267785bc | 6477 | int first = 1; |
6478 | tree list; | |
fc304191 | 6479 | |
267785bc | 6480 | if (mtype == (int)'+') |
6481 | list = CLASS_CLS_METHODS (implementation); | |
fc304191 | 6482 | else |
267785bc | 6483 | list = CLASS_NST_METHODS (implementation); |
fc304191 | 6484 | |
267785bc | 6485 | while (chain) |
fc304191 | 6486 | { |
267785bc | 6487 | /* If the method is associated with a dynamic property, then it |
6488 | is Ok not to have the method implementation, as it will be | |
6489 | generated dynamically at runtime. To decide if the method is | |
6490 | associated with a @dynamic property, we search the list of | |
6491 | @synthesize and @dynamic for this implementation, and look | |
6492 | for any @dynamic property with the same setter or getter name | |
6493 | as this method. */ | |
6494 | tree x; | |
6495 | for (x = IMPL_PROPERTY_DECL (implementation); x; x = TREE_CHAIN (x)) | |
6496 | if (PROPERTY_DYNAMIC (x) | |
6497 | && (PROPERTY_GETTER_NAME (x) == METHOD_SEL_NAME (chain) | |
6498 | || PROPERTY_SETTER_NAME (x) == METHOD_SEL_NAME (chain))) | |
6499 | break; | |
6bbb4715 | 6500 | |
267785bc | 6501 | if (x != NULL_TREE) |
6502 | { | |
6503 | chain = TREE_CHAIN (chain); /* next method... */ | |
6504 | continue; | |
6505 | } | |
fc304191 | 6506 | |
267785bc | 6507 | if (!lookup_method (list, chain)) |
6508 | { | |
6509 | /* If the method is a property setter/getter, we'll still | |
6510 | allow it to be missing if it is implemented by | |
6511 | 'interface' or any of its superclasses. */ | |
6512 | tree property = METHOD_PROPERTY_CONTEXT (chain); | |
6513 | if (property) | |
6514 | { | |
6515 | /* Note that since this is a property getter/setter, it | |
6516 | is obviously an instance method. */ | |
6517 | tree interface = NULL_TREE; | |
fc304191 | 6518 | |
267785bc | 6519 | /* For a category, first check the main class |
6520 | @interface. */ | |
6521 | if (TREE_CODE (implementation) == CATEGORY_IMPLEMENTATION_TYPE) | |
6522 | { | |
6523 | interface = lookup_interface (CLASS_NAME (implementation)); | |
ad8b9c20 | 6524 | |
267785bc | 6525 | /* If the method is found in the main class, it's Ok. */ |
6526 | if (lookup_method (CLASS_NST_METHODS (interface), chain)) | |
6527 | { | |
6528 | chain = DECL_CHAIN (chain); | |
6bbb4715 | 6529 | continue; |
267785bc | 6530 | } |
fc304191 | 6531 | |
267785bc | 6532 | /* Else, get the superclass. */ |
6533 | if (CLASS_SUPER_NAME (interface)) | |
6534 | interface = lookup_interface (CLASS_SUPER_NAME (interface)); | |
6535 | else | |
6536 | interface = NULL_TREE; | |
6537 | } | |
33ad0ed5 | 6538 | |
267785bc | 6539 | /* Get the superclass for classes. */ |
6540 | if (TREE_CODE (implementation) == CLASS_IMPLEMENTATION_TYPE) | |
6541 | { | |
6542 | if (CLASS_SUPER_NAME (implementation)) | |
6543 | interface = lookup_interface (CLASS_SUPER_NAME (implementation)); | |
6544 | else | |
6545 | interface = NULL_TREE; | |
6546 | } | |
fc304191 | 6547 | |
267785bc | 6548 | /* Now, interface is the superclass, if any; go check it. */ |
6549 | if (interface) | |
6550 | { | |
6551 | if (lookup_method_static (interface, chain, 0)) | |
6552 | { | |
6553 | chain = DECL_CHAIN (chain); | |
6554 | continue; | |
6555 | } | |
6556 | } | |
6557 | /* Else, fall through - warn. */ | |
6558 | } | |
6559 | if (first) | |
6560 | { | |
6561 | switch (TREE_CODE (implementation)) | |
6562 | { | |
6563 | case CLASS_IMPLEMENTATION_TYPE: | |
6564 | warning (0, "incomplete implementation of class %qE", | |
6565 | CLASS_NAME (implementation)); | |
6566 | break; | |
6567 | case CATEGORY_IMPLEMENTATION_TYPE: | |
6568 | warning (0, "incomplete implementation of category %qE", | |
6569 | CLASS_SUPER_NAME (implementation)); | |
6570 | break; | |
6571 | default: | |
6572 | gcc_unreachable (); | |
6573 | } | |
6574 | first = 0; | |
6575 | } | |
ad8b9c20 | 6576 | |
267785bc | 6577 | warning (0, "method definition for %<%c%E%> not found", |
6578 | mtype, METHOD_SEL_NAME (chain)); | |
6579 | } | |
fc304191 | 6580 | |
267785bc | 6581 | chain = DECL_CHAIN (chain); |
fc304191 | 6582 | } |
fc304191 | 6583 | |
267785bc | 6584 | return first; |
fc304191 | 6585 | } |
6586 | ||
267785bc | 6587 | /* Check if KLASS, or its superclasses, explicitly conforms to PROTOCOL. */ |
c450c529 | 6588 | |
267785bc | 6589 | static int |
6590 | conforms_to_protocol (tree klass, tree protocol) | |
fc304191 | 6591 | { |
267785bc | 6592 | if (TREE_CODE (protocol) == PROTOCOL_INTERFACE_TYPE) |
6593 | { | |
6594 | tree p = CLASS_PROTOCOL_LIST (klass); | |
6595 | while (p && TREE_VALUE (p) != protocol) | |
6596 | p = TREE_CHAIN (p); | |
fc304191 | 6597 | |
267785bc | 6598 | if (!p) |
6599 | { | |
6600 | tree super = (CLASS_SUPER_NAME (klass) | |
6601 | ? lookup_interface (CLASS_SUPER_NAME (klass)) | |
6602 | : NULL_TREE); | |
6603 | int tmp = super ? conforms_to_protocol (super, protocol) : 0; | |
6604 | if (!tmp) | |
6605 | return 0; | |
6606 | } | |
6607 | } | |
fc304191 | 6608 | |
267785bc | 6609 | return 1; |
fc304191 | 6610 | } |
6611 | ||
267785bc | 6612 | /* Make sure all methods in CHAIN are accessible as MTYPE methods in |
6613 | CONTEXT. This is one of two mechanisms to check protocol integrity. */ | |
fc304191 | 6614 | |
267785bc | 6615 | static int |
6616 | check_methods_accessible (tree chain, tree context, int mtype) | |
376c21d1 | 6617 | { |
267785bc | 6618 | int first = 1; |
6619 | tree list; | |
6620 | tree base_context = context; | |
376c21d1 | 6621 | |
267785bc | 6622 | while (chain) |
376c21d1 | 6623 | { |
267785bc | 6624 | /* If the method is associated with a dynamic property, then it |
6625 | is Ok not to have the method implementation, as it will be | |
6626 | generated dynamically at runtime. Search for any @dynamic | |
6627 | property with the same setter or getter name as this | |
6628 | method. TODO: Use a hashtable lookup. */ | |
6629 | tree x; | |
6630 | for (x = IMPL_PROPERTY_DECL (base_context); x; x = TREE_CHAIN (x)) | |
6631 | if (PROPERTY_DYNAMIC (x) | |
6632 | && (PROPERTY_GETTER_NAME (x) == METHOD_SEL_NAME (chain) | |
6633 | || PROPERTY_SETTER_NAME (x) == METHOD_SEL_NAME (chain))) | |
6634 | break; | |
6bbb4715 | 6635 | |
267785bc | 6636 | if (x != NULL_TREE) |
376c21d1 | 6637 | { |
267785bc | 6638 | chain = TREE_CHAIN (chain); /* next method... */ |
6639 | continue; | |
6bbb4715 | 6640 | } |
2c0b522d | 6641 | |
267785bc | 6642 | context = base_context; |
6643 | while (context) | |
376c21d1 | 6644 | { |
267785bc | 6645 | if (mtype == '+') |
6646 | list = CLASS_CLS_METHODS (context); | |
6647 | else | |
6648 | list = CLASS_NST_METHODS (context); | |
c450c529 | 6649 | |
267785bc | 6650 | if (lookup_method (list, chain)) |
6651 | break; | |
fc304191 | 6652 | |
267785bc | 6653 | switch (TREE_CODE (context)) |
6654 | { | |
6655 | case CLASS_IMPLEMENTATION_TYPE: | |
6656 | case CLASS_INTERFACE_TYPE: | |
6657 | context = (CLASS_SUPER_NAME (context) | |
6658 | ? lookup_interface (CLASS_SUPER_NAME (context)) | |
6659 | : NULL_TREE); | |
6660 | break; | |
6661 | case CATEGORY_IMPLEMENTATION_TYPE: | |
6662 | case CATEGORY_INTERFACE_TYPE: | |
6663 | context = (CLASS_NAME (context) | |
6664 | ? lookup_interface (CLASS_NAME (context)) | |
6665 | : NULL_TREE); | |
6666 | break; | |
6667 | default: | |
6668 | gcc_unreachable (); | |
6669 | } | |
6670 | } | |
ad8b9c20 | 6671 | |
267785bc | 6672 | if (context == NULL_TREE) |
6673 | { | |
6674 | if (first) | |
6675 | { | |
6676 | switch (TREE_CODE (objc_implementation_context)) | |
6677 | { | |
6678 | case CLASS_IMPLEMENTATION_TYPE: | |
6679 | warning (0, "incomplete implementation of class %qE", | |
6680 | CLASS_NAME (objc_implementation_context)); | |
6681 | break; | |
6682 | case CATEGORY_IMPLEMENTATION_TYPE: | |
6683 | warning (0, "incomplete implementation of category %qE", | |
6684 | CLASS_SUPER_NAME (objc_implementation_context)); | |
6685 | break; | |
6686 | default: | |
6687 | gcc_unreachable (); | |
6688 | } | |
6689 | first = 0; | |
6690 | } | |
6691 | warning (0, "method definition for %<%c%E%> not found", | |
6692 | mtype, METHOD_SEL_NAME (chain)); | |
6693 | } | |
fc304191 | 6694 | |
267785bc | 6695 | chain = TREE_CHAIN (chain); /* next method... */ |
fc304191 | 6696 | } |
267785bc | 6697 | return first; |
c450c529 | 6698 | } |
6699 | ||
267785bc | 6700 | /* Check whether the current interface (accessible via |
6701 | 'objc_implementation_context') actually implements protocol P, along | |
6702 | with any protocols that P inherits. */ | |
c450c529 | 6703 | |
267785bc | 6704 | static void |
6705 | check_protocol (tree p, const char *type, tree name) | |
6706 | { | |
6707 | if (TREE_CODE (p) == PROTOCOL_INTERFACE_TYPE) | |
29d8eac9 | 6708 | { |
267785bc | 6709 | int f1, f2; |
c450c529 | 6710 | |
267785bc | 6711 | /* Ensure that all protocols have bodies! */ |
6712 | if (warn_protocol) | |
6713 | { | |
6714 | f1 = check_methods (PROTOCOL_CLS_METHODS (p), | |
6715 | objc_implementation_context, | |
6716 | '+'); | |
6717 | f2 = check_methods (PROTOCOL_NST_METHODS (p), | |
6718 | objc_implementation_context, | |
6719 | '-'); | |
6720 | } | |
6721 | else | |
6722 | { | |
6723 | f1 = check_methods_accessible (PROTOCOL_CLS_METHODS (p), | |
6724 | objc_implementation_context, | |
6725 | '+'); | |
6726 | f2 = check_methods_accessible (PROTOCOL_NST_METHODS (p), | |
6727 | objc_implementation_context, | |
6728 | '-'); | |
6729 | } | |
c450c529 | 6730 | |
267785bc | 6731 | if (!f1 || !f2) |
6732 | warning (0, "%s %qE does not fully implement the %qE protocol", | |
6733 | type, name, PROTOCOL_NAME (p)); | |
6734 | } | |
c450c529 | 6735 | |
267785bc | 6736 | /* Check protocols recursively. */ |
6737 | if (PROTOCOL_LIST (p)) | |
c450c529 | 6738 | { |
267785bc | 6739 | tree subs = PROTOCOL_LIST (p); |
6740 | tree super_class = | |
6741 | lookup_interface (CLASS_SUPER_NAME (implementation_template)); | |
c450c529 | 6742 | |
267785bc | 6743 | while (subs) |
c450c529 | 6744 | { |
267785bc | 6745 | tree sub = TREE_VALUE (subs); |
6746 | ||
6747 | /* If the superclass does not conform to the protocols | |
6748 | inherited by P, then we must! */ | |
6749 | if (!super_class || !conforms_to_protocol (super_class, sub)) | |
6750 | check_protocol (sub, type, name); | |
6751 | subs = TREE_CHAIN (subs); | |
c450c529 | 6752 | } |
6753 | } | |
267785bc | 6754 | } |
c450c529 | 6755 | |
267785bc | 6756 | /* Check whether the current interface (accessible via |
6757 | 'objc_implementation_context') actually implements the protocols listed | |
6758 | in PROTO_LIST. */ | |
c450c529 | 6759 | |
267785bc | 6760 | static void |
6761 | check_protocols (tree proto_list, const char *type, tree name) | |
6762 | { | |
6763 | for ( ; proto_list; proto_list = TREE_CHAIN (proto_list)) | |
29d8eac9 | 6764 | { |
267785bc | 6765 | tree p = TREE_VALUE (proto_list); |
c450c529 | 6766 | |
267785bc | 6767 | check_protocol (p, type, name); |
6768 | } | |
fc304191 | 6769 | } |
267785bc | 6770 | \f |
6771 | /* Make sure that the class CLASS_NAME is defined CODE says which kind | |
6772 | of thing CLASS_NAME ought to be. It can be CLASS_INTERFACE_TYPE, | |
6773 | CLASS_IMPLEMENTATION_TYPE, CATEGORY_INTERFACE_TYPE, or | |
6774 | CATEGORY_IMPLEMENTATION_TYPE. For a CATEGORY_INTERFACE_TYPE, | |
6775 | SUPER_NAME is the name of the category. For a class extension, | |
6776 | CODE is CATEGORY_INTERFACE_TYPE and SUPER_NAME is NULL_TREE. */ | |
fc304191 | 6777 | static tree |
267785bc | 6778 | start_class (enum tree_code code, tree class_name, tree super_name, |
6779 | tree protocol_list, tree attributes) | |
fc304191 | 6780 | { |
267785bc | 6781 | tree klass = NULL_TREE; |
6782 | tree decl; | |
fc304191 | 6783 | |
267785bc | 6784 | #ifdef OBJCPLUS |
6785 | if (current_namespace != global_namespace) | |
fc304191 | 6786 | { |
267785bc | 6787 | error ("Objective-C declarations may only appear in global scope"); |
fc304191 | 6788 | } |
267785bc | 6789 | #endif /* OBJCPLUS */ |
6790 | ||
6791 | if (objc_implementation_context) | |
fc304191 | 6792 | { |
267785bc | 6793 | warning (0, "%<@end%> missing in implementation context"); |
6794 | finish_class (objc_implementation_context); | |
6795 | objc_ivar_chain = NULL_TREE; | |
6796 | objc_implementation_context = NULL_TREE; | |
fc304191 | 6797 | } |
c450c529 | 6798 | |
267785bc | 6799 | /* If this is a class extension, we'll be "reopening" the existing |
6800 | CLASS_INTERFACE_TYPE, so in that case there is no need to create | |
6801 | a new node. */ | |
6802 | if (code != CATEGORY_INTERFACE_TYPE || super_name != NULL_TREE) | |
13dcc150 | 6803 | { |
267785bc | 6804 | klass = make_node (code); |
6805 | TYPE_LANG_SLOT_1 (klass) = make_tree_vec (CLASS_LANG_SLOT_ELTS); | |
6806 | } | |
fc304191 | 6807 | |
267785bc | 6808 | /* Check for existence of the super class, if one was specified. Note |
6809 | that we must have seen an @interface, not just a @class. If we | |
6810 | are looking at a @compatibility_alias, traverse it first. */ | |
6811 | if ((code == CLASS_INTERFACE_TYPE || code == CLASS_IMPLEMENTATION_TYPE) | |
6812 | && super_name) | |
fc304191 | 6813 | { |
267785bc | 6814 | tree super = objc_is_class_name (super_name); |
6815 | tree super_interface = NULL_TREE; | |
6816 | ||
6817 | if (super) | |
6818 | super_interface = lookup_interface (super); | |
6bbb4715 | 6819 | |
267785bc | 6820 | if (!super_interface) |
6821 | { | |
6822 | error ("cannot find interface declaration for %qE, superclass of %qE", | |
6823 | super ? super : super_name, | |
6824 | class_name); | |
6825 | super_name = NULL_TREE; | |
6826 | } | |
6827 | else | |
6828 | { | |
6829 | if (TREE_DEPRECATED (super_interface)) | |
6bbb4715 | 6830 | warning (OPT_Wdeprecated_declarations, "class %qE is deprecated", |
267785bc | 6831 | super); |
6832 | super_name = super; | |
6833 | } | |
fc304191 | 6834 | } |
6835 | ||
267785bc | 6836 | if (code != CATEGORY_INTERFACE_TYPE || super_name != NULL_TREE) |
fc304191 | 6837 | { |
267785bc | 6838 | CLASS_NAME (klass) = class_name; |
6839 | CLASS_SUPER_NAME (klass) = super_name; | |
6840 | CLASS_CLS_METHODS (klass) = NULL_TREE; | |
fc304191 | 6841 | } |
6842 | ||
267785bc | 6843 | if (! objc_is_class_name (class_name) |
6844 | && (decl = lookup_name (class_name))) | |
c450c529 | 6845 | { |
267785bc | 6846 | error ("%qE redeclared as different kind of symbol", |
6847 | class_name); | |
6848 | error ("previous declaration of %q+D", | |
6849 | decl); | |
c450c529 | 6850 | } |
6851 | ||
267785bc | 6852 | switch (code) |
13dcc150 | 6853 | { |
267785bc | 6854 | case CLASS_IMPLEMENTATION_TYPE: |
6855 | { | |
6856 | tree chain; | |
6bbb4715 | 6857 | |
267785bc | 6858 | for (chain = implemented_classes; chain; chain = TREE_CHAIN (chain)) |
6859 | if (TREE_VALUE (chain) == class_name) | |
6860 | { | |
6861 | error ("reimplementation of class %qE", | |
6862 | class_name); | |
6863 | /* TODO: error message saying where it was previously | |
6864 | implemented. */ | |
6865 | break; | |
6866 | } | |
6867 | if (chain == NULL_TREE) | |
6868 | implemented_classes = tree_cons (NULL_TREE, class_name, | |
6869 | implemented_classes); | |
6870 | } | |
fc304191 | 6871 | |
267785bc | 6872 | /* Reset for multiple classes per file. */ |
6873 | method_slot = 0; | |
c17b85ea | 6874 | |
267785bc | 6875 | objc_implementation_context = klass; |
5c872430 | 6876 | |
267785bc | 6877 | /* Lookup the interface for this implementation. */ |
fc304191 | 6878 | |
267785bc | 6879 | if (!(implementation_template = lookup_interface (class_name))) |
6880 | { | |
6881 | warning (0, "cannot find interface declaration for %qE", | |
6882 | class_name); | |
f41791cf | 6883 | add_interface (implementation_template = objc_implementation_context, |
6884 | class_name); | |
267785bc | 6885 | } |
c450c529 | 6886 | |
267785bc | 6887 | /* If a super class has been specified in the implementation, |
6888 | insure it conforms to the one specified in the interface. */ | |
fc304191 | 6889 | |
267785bc | 6890 | if (super_name |
6891 | && (super_name != CLASS_SUPER_NAME (implementation_template))) | |
fc304191 | 6892 | { |
267785bc | 6893 | tree previous_name = CLASS_SUPER_NAME (implementation_template); |
6894 | error ("conflicting super class name %qE", | |
6895 | super_name); | |
6896 | if (previous_name) | |
6897 | error ("previous declaration of %qE", previous_name); | |
fc304191 | 6898 | else |
267785bc | 6899 | error ("previous declaration"); |
fc304191 | 6900 | } |
fc304191 | 6901 | |
267785bc | 6902 | else if (! super_name) |
6903 | { | |
6904 | CLASS_SUPER_NAME (objc_implementation_context) | |
6905 | = CLASS_SUPER_NAME (implementation_template); | |
6906 | } | |
6907 | break; | |
fc304191 | 6908 | |
267785bc | 6909 | case CLASS_INTERFACE_TYPE: |
6910 | if (lookup_interface (class_name)) | |
6911 | #ifdef OBJCPLUS | |
6912 | error ("duplicate interface declaration for class %qE", class_name); | |
6913 | #else | |
6914 | warning (0, "duplicate interface declaration for class %qE", class_name); | |
6915 | #endif | |
6916 | else | |
f41791cf | 6917 | add_interface (klass, class_name); |
6bbb4715 | 6918 | |
267785bc | 6919 | if (protocol_list) |
6920 | CLASS_PROTOCOL_LIST (klass) | |
6921 | = lookup_and_install_protocols (protocol_list, /* definition_required */ true); | |
c450c529 | 6922 | |
267785bc | 6923 | if (attributes) |
6924 | { | |
6925 | tree attribute; | |
6926 | for (attribute = attributes; attribute; attribute = TREE_CHAIN (attribute)) | |
6927 | { | |
6928 | tree name = TREE_PURPOSE (attribute); | |
6bbb4715 | 6929 | |
a0aa15e7 | 6930 | /* TODO: Document what the objc_exception attribute is/does. */ |
267785bc | 6931 | /* We handle the 'deprecated' and (undocumented) 'objc_exception' |
6932 | attributes. */ | |
6933 | if (is_attribute_p ("deprecated", name)) | |
6934 | TREE_DEPRECATED (klass) = 1; | |
6935 | else if (is_attribute_p ("objc_exception", name)) | |
6936 | CLASS_HAS_EXCEPTION_ATTR (klass) = 1; | |
6937 | else | |
6938 | /* Warn about and ignore all others for now, but store them. */ | |
6939 | warning (OPT_Wattributes, "%qE attribute directive ignored", name); | |
6940 | } | |
6941 | TYPE_ATTRIBUTES (klass) = attributes; | |
6942 | } | |
6bbb4715 | 6943 | break; |
fc304191 | 6944 | |
267785bc | 6945 | case CATEGORY_INTERFACE_TYPE: |
6946 | { | |
6947 | tree class_category_is_assoc_with; | |
6bbb4715 | 6948 | |
267785bc | 6949 | /* For a category, class_name is really the name of the class that |
6950 | the following set of methods will be associated with. We must | |
6951 | find the interface so that can derive the objects template. */ | |
6952 | if (!(class_category_is_assoc_with = lookup_interface (class_name))) | |
6953 | { | |
6954 | error ("cannot find interface declaration for %qE", | |
6955 | class_name); | |
6956 | exit (FATAL_EXIT_CODE); | |
6957 | } | |
6958 | else | |
6959 | { | |
6960 | if (TREE_DEPRECATED (class_category_is_assoc_with)) | |
6bbb4715 | 6961 | warning (OPT_Wdeprecated_declarations, "class %qE is deprecated", |
267785bc | 6962 | class_name); |
fc304191 | 6963 | |
267785bc | 6964 | if (super_name == NULL_TREE) |
6965 | { | |
6966 | /* This is a class extension. Get the original | |
6967 | interface, and continue working on it. */ | |
6968 | objc_in_class_extension = true; | |
6969 | klass = class_category_is_assoc_with; | |
fc304191 | 6970 | |
267785bc | 6971 | if (protocol_list) |
6972 | { | |
6973 | /* Append protocols to the original protocol | |
6974 | list. */ | |
6975 | CLASS_PROTOCOL_LIST (klass) | |
6976 | = chainon (CLASS_PROTOCOL_LIST (klass), | |
6977 | lookup_and_install_protocols | |
6978 | (protocol_list, | |
6979 | /* definition_required */ true)); | |
6980 | } | |
6981 | } | |
6982 | else | |
6983 | { | |
6984 | add_category (class_category_is_assoc_with, klass); | |
6bbb4715 | 6985 | |
267785bc | 6986 | if (protocol_list) |
6987 | CLASS_PROTOCOL_LIST (klass) | |
6988 | = lookup_and_install_protocols | |
6989 | (protocol_list, /* definition_required */ true); | |
6990 | } | |
6991 | } | |
6992 | } | |
6993 | break; | |
6bbb4715 | 6994 | |
267785bc | 6995 | case CATEGORY_IMPLEMENTATION_TYPE: |
6996 | /* Reset for multiple classes per file. */ | |
6997 | method_slot = 0; | |
fc304191 | 6998 | |
267785bc | 6999 | objc_implementation_context = klass; |
fc304191 | 7000 | |
267785bc | 7001 | /* For a category, class_name is really the name of the class that |
7002 | the following set of methods will be associated with. We must | |
7003 | find the interface so that can derive the objects template. */ | |
fc304191 | 7004 | |
267785bc | 7005 | if (!(implementation_template = lookup_interface (class_name))) |
7006 | { | |
7007 | error ("cannot find interface declaration for %qE", | |
7008 | class_name); | |
7009 | exit (FATAL_EXIT_CODE); | |
7010 | } | |
7011 | break; | |
7012 | default: | |
7013 | gcc_unreachable (); | |
7014 | } | |
7015 | return klass; | |
fc304191 | 7016 | } |
7017 | ||
267785bc | 7018 | static tree |
7019 | continue_class (tree klass) | |
fc304191 | 7020 | { |
267785bc | 7021 | switch (TREE_CODE (klass)) |
e17b52f6 | 7022 | { |
29d8eac9 | 7023 | case CLASS_IMPLEMENTATION_TYPE: |
29d8eac9 | 7024 | case CATEGORY_IMPLEMENTATION_TYPE: |
29d8eac9 | 7025 | { |
267785bc | 7026 | struct imp_entry *imp_entry; |
7027 | ||
7028 | /* Check consistency of the instance variables. */ | |
7029 | ||
7030 | if (CLASS_RAW_IVARS (klass)) | |
7031 | check_ivars (implementation_template, klass); | |
6bbb4715 | 7032 | |
267785bc | 7033 | /* code generation */ |
7034 | #ifdef OBJCPLUS | |
7035 | push_lang_context (lang_name_c); | |
7036 | #endif | |
7037 | build_private_template (implementation_template); | |
7038 | uprivate_record = CLASS_STATIC_TEMPLATE (implementation_template); | |
7039 | objc_instance_type = build_pointer_type (uprivate_record); | |
7040 | ||
25a27413 | 7041 | imp_entry = ggc_alloc<struct imp_entry> (); |
267785bc | 7042 | |
7043 | imp_entry->next = imp_list; | |
7044 | imp_entry->imp_context = klass; | |
7045 | imp_entry->imp_template = implementation_template; | |
7046 | ucls_super_ref = uucls_super_ref = NULL; | |
7047 | if (TREE_CODE (klass) == CLASS_IMPLEMENTATION_TYPE) | |
7048 | { | |
7049 | imp_entry->class_decl = (*runtime.class_decl) (klass); | |
7050 | imp_entry->meta_decl = (*runtime.metaclass_decl) (klass); | |
7051 | } | |
7052 | else | |
7053 | { | |
7054 | imp_entry->class_decl = (*runtime.category_decl) (klass); | |
7055 | imp_entry->meta_decl = NULL; | |
7056 | } | |
7057 | imp_entry->has_cxx_cdtors = 0; | |
7058 | ||
7059 | /* Append to front and increment count. */ | |
7060 | imp_list = imp_entry; | |
7061 | if (TREE_CODE (klass) == CLASS_IMPLEMENTATION_TYPE) | |
7062 | imp_count++; | |
7063 | else | |
7064 | cat_count++; | |
7065 | #ifdef OBJCPLUS | |
7066 | pop_lang_context (); | |
7067 | #endif /* OBJCPLUS */ | |
6bbb4715 | 7068 | |
267785bc | 7069 | return get_class_ivars (implementation_template, true); |
29d8eac9 | 7070 | break; |
267785bc | 7071 | } |
7072 | case CLASS_INTERFACE_TYPE: | |
29d8eac9 | 7073 | { |
267785bc | 7074 | if (objc_in_class_extension) |
7075 | return NULL_TREE; | |
7076 | #ifdef OBJCPLUS | |
7077 | push_lang_context (lang_name_c); | |
7078 | #endif /* OBJCPLUS */ | |
7079 | objc_collecting_ivars = 1; | |
7080 | build_private_template (klass); | |
7081 | objc_collecting_ivars = 0; | |
7082 | #ifdef OBJCPLUS | |
7083 | pop_lang_context (); | |
7084 | #endif /* OBJCPLUS */ | |
7085 | return NULL_TREE; | |
29d8eac9 | 7086 | break; |
7087 | } | |
7088 | default: | |
267785bc | 7089 | return error_mark_node; |
e17b52f6 | 7090 | } |
c450c529 | 7091 | } |
7092 | ||
267785bc | 7093 | /* This routine builds name of the setter synthesized function. */ |
f572c7ba | 7094 | char * |
267785bc | 7095 | objc_build_property_setter_name (tree ident) |
c450c529 | 7096 | { |
267785bc | 7097 | /* TODO: Use alloca to allocate buffer of appropriate size. */ |
7098 | static char string[BUFSIZE]; | |
7099 | sprintf (string, "set%s:", IDENTIFIER_POINTER (ident)); | |
7100 | string[3] = TOUPPER (string[3]); | |
7101 | return string; | |
c450c529 | 7102 | } |
7103 | ||
267785bc | 7104 | /* This routine prepares the declarations of the property accessor |
7105 | helper functions (objc_getProperty(), etc) that are used when | |
6bbb4715 | 7106 | @synthesize is used. |
7107 | ||
7108 | runtime-specific routines are built in the respective runtime | |
267785bc | 7109 | initialize functions. */ |
6bbb4715 | 7110 | static void |
267785bc | 7111 | build_common_objc_property_accessor_helpers (void) |
7112 | { | |
7113 | tree type; | |
39b8ddc6 | 7114 | |
267785bc | 7115 | /* Declare the following function: |
7116 | id | |
6bbb4715 | 7117 | objc_getProperty (id self, SEL _cmd, |
267785bc | 7118 | ptrdiff_t offset, BOOL is_atomic); */ |
7119 | type = build_function_type_list (objc_object_type, | |
7120 | objc_object_type, | |
7121 | objc_selector_type, | |
7122 | ptrdiff_type_node, | |
7123 | boolean_type_node, | |
7124 | NULL_TREE); | |
7125 | objc_getProperty_decl = add_builtin_function ("objc_getProperty", | |
7126 | type, 0, NOT_BUILT_IN, | |
7127 | NULL, NULL_TREE); | |
7128 | TREE_NOTHROW (objc_getProperty_decl) = 0; | |
6bbb4715 | 7129 | |
267785bc | 7130 | /* Declare the following function: |
7131 | void | |
6bbb4715 | 7132 | objc_setProperty (id self, SEL _cmd, |
7133 | ptrdiff_t offset, id new_value, | |
267785bc | 7134 | BOOL is_atomic, BOOL should_copy); */ |
7135 | type = build_function_type_list (void_type_node, | |
7136 | objc_object_type, | |
7137 | objc_selector_type, | |
7138 | ptrdiff_type_node, | |
7139 | objc_object_type, | |
7140 | boolean_type_node, | |
7141 | boolean_type_node, | |
7142 | NULL_TREE); | |
7143 | objc_setProperty_decl = add_builtin_function ("objc_setProperty", | |
7144 | type, 0, NOT_BUILT_IN, | |
7145 | NULL, NULL_TREE); | |
7146 | TREE_NOTHROW (objc_setProperty_decl) = 0; | |
fc304191 | 7147 | } |
7148 | ||
267785bc | 7149 | /* This looks up an ivar in a class (including superclasses). */ |
fc304191 | 7150 | static tree |
267785bc | 7151 | lookup_ivar (tree interface, tree instance_variable_name) |
fc304191 | 7152 | { |
267785bc | 7153 | while (interface) |
fc304191 | 7154 | { |
267785bc | 7155 | tree decl_chain; |
6bbb4715 | 7156 | |
267785bc | 7157 | for (decl_chain = CLASS_IVARS (interface); decl_chain; decl_chain = DECL_CHAIN (decl_chain)) |
7158 | if (DECL_NAME (decl_chain) == instance_variable_name) | |
7159 | return decl_chain; | |
6bbb4715 | 7160 | |
267785bc | 7161 | /* Not found. Search superclass if any. */ |
7162 | if (CLASS_SUPER_NAME (interface)) | |
7163 | interface = lookup_interface (CLASS_SUPER_NAME (interface)); | |
fc304191 | 7164 | } |
6bbb4715 | 7165 | |
267785bc | 7166 | return NULL_TREE; |
fc304191 | 7167 | } |
7168 | ||
267785bc | 7169 | /* This routine synthesizes a 'getter' method. This is only called |
7170 | for @synthesize properties. */ | |
7171 | static void | |
7172 | objc_synthesize_getter (tree klass, tree class_methods ATTRIBUTE_UNUSED, tree property) | |
fc304191 | 7173 | { |
267785bc | 7174 | location_t location = DECL_SOURCE_LOCATION (property); |
7175 | tree fn, decl; | |
7176 | tree body; | |
7177 | tree ret_val; | |
fc304191 | 7178 | |
267785bc | 7179 | /* If user has implemented a getter with same name then do nothing. */ |
7180 | if (lookup_method (CLASS_NST_METHODS (objc_implementation_context), | |
7181 | PROPERTY_GETTER_NAME (property))) | |
7182 | return; | |
fc304191 | 7183 | |
267785bc | 7184 | /* Find declaration of the property getter in the interface (or |
7185 | superclass, or protocol). There must be one. */ | |
7186 | decl = lookup_method_static (klass, PROPERTY_GETTER_NAME (property), 0); | |
fc304191 | 7187 | |
267785bc | 7188 | /* If one not declared in the interface, this condition has already |
7189 | been reported as user error (because property was not declared in | |
7190 | the interface). */ | |
7191 | if (!decl) | |
7192 | return; | |
fc304191 | 7193 | |
267785bc | 7194 | /* Adapt the 'decl'. Use the source location of the @synthesize |
7195 | statement for error messages. */ | |
7196 | decl = copy_node (decl); | |
7197 | DECL_SOURCE_LOCATION (decl) = location; | |
fc304191 | 7198 | |
4232a958 | 7199 | objc_start_method_definition (false /* is_class_method */, decl, NULL_TREE, |
7200 | NULL_TREE); | |
267785bc | 7201 | body = c_begin_compound_stmt (true); |
c450c529 | 7202 | |
267785bc | 7203 | /* Now we need to decide how we build the getter. There are three |
7204 | cases: | |
40c8d1dd | 7205 | |
267785bc | 7206 | for 'copy' or 'retain' properties we need to use the |
7207 | objc_getProperty() accessor helper which knows about retain and | |
7208 | copy. It supports both 'nonatomic' and 'atomic' access. | |
8c582e4f | 7209 | |
267785bc | 7210 | for 'nonatomic, assign' properties we can access the instance |
7211 | variable directly. 'nonatomic' means we don't have to use locks, | |
7212 | and 'assign' means we don't have to worry about retain or copy. | |
7213 | If you combine the two, it means we can just access the instance | |
7214 | variable directly. | |
8c582e4f | 7215 | |
267785bc | 7216 | for 'atomic, assign' properties we use objc_copyStruct() (for the |
7217 | next runtime) or objc_getPropertyStruct() (for the GNU runtime). */ | |
7218 | switch (PROPERTY_ASSIGN_SEMANTICS (property)) | |
40c8d1dd | 7219 | { |
267785bc | 7220 | case OBJC_PROPERTY_RETAIN: |
7221 | case OBJC_PROPERTY_COPY: | |
7222 | { | |
7223 | /* We build "return objc_getProperty (self, _cmd, offset, is_atomic);" */ | |
7224 | tree cmd, ivar, offset, is_atomic; | |
7225 | cmd = TREE_CHAIN (DECL_ARGUMENTS (current_function_decl)); | |
8c582e4f | 7226 | |
267785bc | 7227 | /* Find the ivar to compute the offset. */ |
7228 | ivar = lookup_ivar (klass, PROPERTY_IVAR_NAME (property)); | |
7229 | if (!ivar || is_private (ivar)) | |
7230 | { | |
7231 | /* This should never happen. */ | |
7232 | error_at (location, | |
7233 | "can not find instance variable associated with property"); | |
7234 | ret_val = error_mark_node; | |
7235 | break; | |
7236 | } | |
7237 | offset = byte_position (ivar); | |
8c582e4f | 7238 | |
267785bc | 7239 | if (PROPERTY_NONATOMIC (property)) |
7240 | is_atomic = boolean_false_node; | |
7241 | else | |
7242 | is_atomic = boolean_true_node; | |
7243 | ||
7244 | ret_val = build_function_call | |
7245 | (location, | |
7246 | /* Function prototype. */ | |
7247 | objc_getProperty_decl, | |
7248 | /* Parameters. */ | |
7249 | tree_cons /* self */ | |
7250 | (NULL_TREE, self_decl, | |
7251 | tree_cons /* _cmd */ | |
7252 | (NULL_TREE, cmd, | |
7253 | tree_cons /* offset */ | |
7254 | (NULL_TREE, offset, | |
7255 | tree_cons /* is_atomic */ | |
7256 | (NULL_TREE, is_atomic, NULL_TREE))))); | |
7257 | } | |
7258 | break; | |
6bbb4715 | 7259 | case OBJC_PROPERTY_ASSIGN: |
267785bc | 7260 | if (PROPERTY_NONATOMIC (property)) |
7261 | { | |
7262 | /* We build "return self->PROPERTY_IVAR_NAME;" */ | |
7263 | ret_val = objc_lookup_ivar (NULL_TREE, PROPERTY_IVAR_NAME (property)); | |
7264 | break; | |
7265 | } | |
7266 | else | |
7267 | { | |
7268 | /* We build | |
7269 | <property type> __objc_property_temp; | |
7270 | objc_getPropertyStruct (&__objc_property_temp, | |
7271 | &(self->PROPERTY_IVAR_NAME), | |
7272 | sizeof (type of self->PROPERTY_IVAR_NAME), | |
7273 | is_atomic, | |
7274 | false) | |
7275 | return __objc_property_temp; | |
7276 | ||
7277 | For the NeXT runtime, we need to use objc_copyStruct | |
7278 | instead of objc_getPropertyStruct. */ | |
7279 | tree objc_property_temp_decl, function_decl, function_call; | |
7280 | tree size_of, is_atomic; | |
7281 | ||
7282 | objc_property_temp_decl = objc_create_temporary_var (TREE_TYPE (property), "__objc_property_temp"); | |
7283 | DECL_SOURCE_LOCATION (objc_property_temp_decl) = location; | |
7284 | objc_property_temp_decl = lang_hooks.decls.pushdecl (objc_property_temp_decl); | |
7285 | ||
7286 | /* sizeof (ivar type). Since the ivar and the property have | |
7287 | the same type, there is no need to lookup the ivar. */ | |
7288 | size_of = c_sizeof_or_alignof_type (location, TREE_TYPE (property), | |
7289 | true /* is_sizeof */, | |
a179a7dc | 7290 | false /* min_alignof */, |
267785bc | 7291 | false /* complain */); |
6bbb4715 | 7292 | |
267785bc | 7293 | if (PROPERTY_NONATOMIC (property)) |
7294 | is_atomic = boolean_false_node; | |
8c582e4f | 7295 | else |
267785bc | 7296 | is_atomic = boolean_true_node; |
6bbb4715 | 7297 | |
267785bc | 7298 | if (objc_copyStruct_decl) |
7299 | function_decl = objc_copyStruct_decl; | |
7300 | else | |
7301 | function_decl = objc_getPropertyStruct_decl; | |
7302 | ||
7303 | function_call = build_function_call | |
7304 | (location, | |
7305 | /* Function prototype. */ | |
7306 | function_decl, | |
7307 | /* Parameters. */ | |
7308 | tree_cons /* &__objc_property_temp_decl */ | |
7309 | /* Warning: note that using build_fold_addr_expr_loc() | |
7310 | here causes invalid code to be generated. */ | |
7311 | (NULL_TREE, build_unary_op (location, ADDR_EXPR, objc_property_temp_decl, 0), | |
7312 | tree_cons /* &(self->PROPERTY_IVAR_NAME); */ | |
6bbb4715 | 7313 | (NULL_TREE, build_fold_addr_expr_loc (location, |
7314 | objc_lookup_ivar | |
267785bc | 7315 | (NULL_TREE, PROPERTY_IVAR_NAME (property))), |
7316 | tree_cons /* sizeof (PROPERTY_IVAR) */ | |
7317 | (NULL_TREE, size_of, | |
7318 | tree_cons /* is_atomic */ | |
7319 | (NULL_TREE, is_atomic, | |
7320 | /* TODO: This is currently ignored by the GNU | |
7321 | runtime, but what about the next one ? */ | |
7322 | tree_cons /* has_strong */ | |
7323 | (NULL_TREE, boolean_true_node, NULL_TREE)))))); | |
7324 | ||
7325 | add_stmt (function_call); | |
7326 | ||
7327 | ret_val = objc_property_temp_decl; | |
8c582e4f | 7328 | } |
267785bc | 7329 | break; |
7330 | default: | |
7331 | gcc_unreachable (); | |
8c582e4f | 7332 | } |
7333 | ||
267785bc | 7334 | gcc_assert (ret_val); |
40c8d1dd | 7335 | |
267785bc | 7336 | #ifdef OBJCPLUS |
7337 | finish_return_stmt (ret_val); | |
7338 | #else | |
7339 | c_finish_return (location, ret_val, NULL_TREE); | |
7340 | #endif | |
7341 | ||
7342 | add_stmt (c_end_compound_stmt (location, body, true)); | |
7343 | fn = current_function_decl; | |
7344 | #ifdef OBJCPLUS | |
7345 | finish_function (); | |
7346 | #endif | |
7347 | objc_finish_method_definition (fn); | |
40c8d1dd | 7348 | } |
7349 | ||
267785bc | 7350 | /* This routine synthesizes a 'setter' method. */ |
848fa8f1 | 7351 | |
267785bc | 7352 | static void |
7353 | objc_synthesize_setter (tree klass, tree class_methods ATTRIBUTE_UNUSED, tree property) | |
fc304191 | 7354 | { |
267785bc | 7355 | location_t location = DECL_SOURCE_LOCATION (property); |
7356 | tree fn, decl; | |
7357 | tree body; | |
7358 | tree new_value, statement; | |
fc304191 | 7359 | |
267785bc | 7360 | /* If user has implemented a setter with same name then do nothing. */ |
7361 | if (lookup_method (CLASS_NST_METHODS (objc_implementation_context), | |
7362 | PROPERTY_SETTER_NAME (property))) | |
7363 | return; | |
fc304191 | 7364 | |
267785bc | 7365 | /* Find declaration of the property setter in the interface (or |
7366 | superclass, or protocol). There must be one. */ | |
7367 | decl = lookup_method_static (klass, PROPERTY_SETTER_NAME (property), 0); | |
fc304191 | 7368 | |
267785bc | 7369 | /* If one not declared in the interface, this condition has already |
7370 | been reported as user error (because property was not declared in | |
7371 | the interface). */ | |
7372 | if (!decl) | |
7373 | return; | |
c17b85ea | 7374 | |
267785bc | 7375 | /* Adapt the 'decl'. Use the source location of the @synthesize |
7376 | statement for error messages. */ | |
7377 | decl = copy_node (decl); | |
7378 | DECL_SOURCE_LOCATION (decl) = DECL_SOURCE_LOCATION (property); | |
13dcc150 | 7379 | |
4232a958 | 7380 | objc_start_method_definition (false /* is_class_method */, decl, NULL_TREE, |
7381 | NULL_TREE); | |
b5266a0c | 7382 | |
267785bc | 7383 | body = c_begin_compound_stmt (true); |
fc304191 | 7384 | |
267785bc | 7385 | /* The 'new_value' is the only argument to the method, which is the |
7386 | 3rd argument of the function, after self and _cmd. We use twice | |
7387 | TREE_CHAIN to move forward two arguments. */ | |
7388 | new_value = TREE_CHAIN (TREE_CHAIN (DECL_ARGUMENTS (current_function_decl))); | |
7389 | ||
7390 | /* This would presumably happen if the user has specified a | |
7391 | prototype for the setter that does not have an argument! */ | |
7392 | if (new_value == NULL_TREE) | |
fc304191 | 7393 | { |
267785bc | 7394 | /* TODO: This should be caught much earlier than this. */ |
7395 | error_at (DECL_SOURCE_LOCATION (decl), "invalid setter, it must have one argument"); | |
7396 | /* Try to recover somehow. */ | |
7397 | new_value = error_mark_node; | |
7398 | } | |
13dcc150 | 7399 | |
267785bc | 7400 | /* Now we need to decide how we build the setter. There are three |
7401 | cases: | |
ea446b0b | 7402 | |
267785bc | 7403 | for 'copy' or 'retain' properties we need to use the |
7404 | objc_setProperty() accessor helper which knows about retain and | |
7405 | copy. It supports both 'nonatomic' and 'atomic' access. | |
13dcc150 | 7406 | |
267785bc | 7407 | for 'nonatomic, assign' properties we can access the instance |
7408 | variable directly. 'nonatomic' means we don't have to use locks, | |
7409 | and 'assign' means we don't have to worry about retain or copy. | |
7410 | If you combine the two, it means we can just access the instance | |
7411 | variable directly. | |
fc304191 | 7412 | |
267785bc | 7413 | for 'atomic, assign' properties we use objc_copyStruct() (for the |
7414 | next runtime) or objc_setPropertyStruct() (for the GNU runtime). */ | |
7415 | switch (PROPERTY_ASSIGN_SEMANTICS (property)) | |
fc304191 | 7416 | { |
267785bc | 7417 | case OBJC_PROPERTY_RETAIN: |
7418 | case OBJC_PROPERTY_COPY: | |
7419 | { | |
7420 | /* We build "objc_setProperty (self, _cmd, new_value, offset, is_atomic, should_copy);" */ | |
7421 | tree cmd, ivar, offset, is_atomic, should_copy; | |
7422 | cmd = TREE_CHAIN (DECL_ARGUMENTS (current_function_decl)); | |
fc304191 | 7423 | |
267785bc | 7424 | /* Find the ivar to compute the offset. */ |
7425 | ivar = lookup_ivar (klass, PROPERTY_IVAR_NAME (property)); | |
7426 | if (!ivar || is_private (ivar)) | |
7427 | { | |
7428 | error_at (location, | |
7429 | "can not find instance variable associated with property"); | |
7430 | statement = error_mark_node; | |
7431 | break; | |
7432 | } | |
7433 | offset = byte_position (ivar); | |
fc304191 | 7434 | |
267785bc | 7435 | if (PROPERTY_NONATOMIC (property)) |
7436 | is_atomic = boolean_false_node; | |
7437 | else | |
7438 | is_atomic = boolean_true_node; | |
6bbb4715 | 7439 | |
267785bc | 7440 | if (PROPERTY_ASSIGN_SEMANTICS (property) == OBJC_PROPERTY_COPY) |
7441 | should_copy = boolean_true_node; | |
7442 | else | |
7443 | should_copy = boolean_false_node; | |
0ced0389 | 7444 | |
267785bc | 7445 | statement = build_function_call |
7446 | (location, | |
7447 | /* Function prototype. */ | |
7448 | objc_setProperty_decl, | |
7449 | /* Parameters. */ | |
7450 | tree_cons /* self */ | |
7451 | (NULL_TREE, self_decl, | |
7452 | tree_cons /* _cmd */ | |
7453 | (NULL_TREE, cmd, | |
7454 | tree_cons /* offset */ | |
7455 | (NULL_TREE, offset, | |
7456 | tree_cons /* new_value */ | |
7457 | (NULL_TREE, new_value, | |
7458 | tree_cons /* is_atomic */ | |
6bbb4715 | 7459 | (NULL_TREE, is_atomic, |
267785bc | 7460 | tree_cons /* should_copy */ |
7461 | (NULL_TREE, should_copy, NULL_TREE))))))); | |
7462 | } | |
7463 | break; | |
6bbb4715 | 7464 | case OBJC_PROPERTY_ASSIGN: |
267785bc | 7465 | if (PROPERTY_NONATOMIC (property)) |
7466 | { | |
7467 | /* We build "self->PROPERTY_IVAR_NAME = new_value;" */ | |
7468 | statement = build_modify_expr | |
7469 | (location, | |
7470 | objc_lookup_ivar (NULL_TREE, PROPERTY_IVAR_NAME (property)), | |
6bbb4715 | 7471 | NULL_TREE, NOP_EXPR, |
267785bc | 7472 | location, new_value, NULL_TREE); |
7473 | break; | |
7474 | } | |
7475 | else | |
7476 | { | |
7477 | /* We build | |
7478 | objc_setPropertyStruct (&(self->PROPERTY_IVAR_NAME), | |
7479 | &new_value, | |
7480 | sizeof (type of self->PROPERTY_IVAR_NAME), | |
7481 | is_atomic, | |
7482 | false) | |
0ced0389 | 7483 | |
267785bc | 7484 | For the NeXT runtime, we need to use objc_copyStruct |
7485 | instead of objc_getPropertyStruct. */ | |
7486 | tree function_decl, size_of, is_atomic; | |
2744a89f | 7487 | |
267785bc | 7488 | /* sizeof (ivar type). Since the ivar and the property have |
7489 | the same type, there is no need to lookup the ivar. */ | |
7490 | size_of = c_sizeof_or_alignof_type (location, TREE_TYPE (property), | |
7491 | true /* is_sizeof */, | |
a179a7dc | 7492 | false /* min_alignof */, |
267785bc | 7493 | false /* complain */); |
6bbb4715 | 7494 | |
267785bc | 7495 | if (PROPERTY_NONATOMIC (property)) |
7496 | is_atomic = boolean_false_node; | |
2744a89f | 7497 | else |
267785bc | 7498 | is_atomic = boolean_true_node; |
6bbb4715 | 7499 | |
267785bc | 7500 | if (objc_copyStruct_decl) |
7501 | function_decl = objc_copyStruct_decl; | |
7502 | else | |
7503 | function_decl = objc_setPropertyStruct_decl; | |
2744a89f | 7504 | |
6bbb4715 | 7505 | statement = build_function_call |
267785bc | 7506 | (location, |
7507 | /* Function prototype. */ | |
7508 | function_decl, | |
7509 | /* Parameters. */ | |
7510 | tree_cons /* &(self->PROPERTY_IVAR_NAME); */ | |
6bbb4715 | 7511 | (NULL_TREE, build_fold_addr_expr_loc (location, |
7512 | objc_lookup_ivar | |
267785bc | 7513 | (NULL_TREE, PROPERTY_IVAR_NAME (property))), |
7514 | tree_cons /* &new_value */ | |
7515 | (NULL_TREE, build_fold_addr_expr_loc (location, new_value), | |
7516 | tree_cons /* sizeof (PROPERTY_IVAR) */ | |
7517 | (NULL_TREE, size_of, | |
7518 | tree_cons /* is_atomic */ | |
7519 | (NULL_TREE, is_atomic, | |
7520 | /* TODO: This is currently ignored by the GNU | |
7521 | runtime, but what about the next one ? */ | |
7522 | tree_cons /* has_strong */ | |
7523 | (NULL_TREE, boolean_true_node, NULL_TREE)))))); | |
7524 | } | |
7525 | break; | |
7526 | default: | |
7527 | gcc_unreachable (); | |
fc304191 | 7528 | } |
267785bc | 7529 | gcc_assert (statement); |
fc304191 | 7530 | |
6bbb4715 | 7531 | add_stmt (statement); |
267785bc | 7532 | add_stmt (c_end_compound_stmt (location, body, true)); |
7533 | fn = current_function_decl; | |
7534 | #ifdef OBJCPLUS | |
7535 | finish_function (); | |
7536 | #endif | |
7537 | objc_finish_method_definition (fn); | |
7538 | } | |
9be46be2 | 7539 | |
267785bc | 7540 | /* This function is a sub-routine of objc_add_synthesize_declaration. |
7541 | It is called for each property to synthesize once we have | |
7542 | determined that the context is Ok. */ | |
7543 | static void | |
7544 | objc_add_synthesize_declaration_for_property (location_t location, tree interface, | |
7545 | tree property_name, tree ivar_name) | |
fc304191 | 7546 | { |
267785bc | 7547 | /* Find the @property declaration. */ |
7548 | tree property; | |
7549 | tree x; | |
b11c0115 | 7550 | |
267785bc | 7551 | /* Check that synthesize or dynamic has not already been used for |
7552 | the same property. */ | |
7553 | for (property = IMPL_PROPERTY_DECL (objc_implementation_context); property; property = TREE_CHAIN (property)) | |
7554 | if (PROPERTY_NAME (property) == property_name) | |
7555 | { | |
7556 | location_t original_location = DECL_SOURCE_LOCATION (property); | |
6bbb4715 | 7557 | |
267785bc | 7558 | if (PROPERTY_DYNAMIC (property)) |
6bbb4715 | 7559 | error_at (location, "property %qs already specified in %<@dynamic%>", |
267785bc | 7560 | IDENTIFIER_POINTER (property_name)); |
7561 | else | |
6bbb4715 | 7562 | error_at (location, "property %qs already specified in %<@synthesize%>", |
267785bc | 7563 | IDENTIFIER_POINTER (property_name)); |
6bbb4715 | 7564 | |
267785bc | 7565 | if (original_location != UNKNOWN_LOCATION) |
7566 | inform (original_location, "originally specified here"); | |
7567 | return; | |
7568 | } | |
39b8ddc6 | 7569 | |
267785bc | 7570 | /* Check that the property is declared in the interface. It could |
7571 | also be declared in a superclass or protocol. */ | |
7572 | property = lookup_property (interface, property_name); | |
c17b85ea | 7573 | |
267785bc | 7574 | if (!property) |
c17b85ea | 7575 | { |
6bbb4715 | 7576 | error_at (location, "no declaration of property %qs found in the interface", |
267785bc | 7577 | IDENTIFIER_POINTER (property_name)); |
7578 | return; | |
7579 | } | |
7580 | else | |
7581 | { | |
7582 | /* We have to copy the property, because we want to chain it to | |
7583 | the implementation context, and we want to store the source | |
7584 | location of the @synthesize, not of the original | |
7585 | @property. */ | |
7586 | property = copy_node (property); | |
7587 | DECL_SOURCE_LOCATION (property) = location; | |
fc304191 | 7588 | } |
fc304191 | 7589 | |
267785bc | 7590 | /* Determine PROPERTY_IVAR_NAME. */ |
7591 | if (ivar_name == NULL_TREE) | |
7592 | ivar_name = property_name; | |
fc304191 | 7593 | |
267785bc | 7594 | /* Check that the instance variable exists. You can only use an |
7595 | instance variable from the same class, not one from the | |
7596 | superclass (this makes sense as it allows us to check that an | |
7597 | instance variable is only used in one synthesized property). */ | |
7598 | { | |
7599 | tree ivar = is_ivar (CLASS_IVARS (interface), ivar_name); | |
7600 | tree type_of_ivar; | |
7601 | if (!ivar) | |
7602 | { | |
6bbb4715 | 7603 | error_at (location, "ivar %qs used by %<@synthesize%> declaration must be an existing ivar", |
267785bc | 7604 | IDENTIFIER_POINTER (property_name)); |
7605 | return; | |
7606 | } | |
fc304191 | 7607 | |
267785bc | 7608 | if (DECL_BIT_FIELD_TYPE (ivar)) |
7609 | type_of_ivar = DECL_BIT_FIELD_TYPE (ivar); | |
7610 | else | |
7611 | type_of_ivar = TREE_TYPE (ivar); | |
6bbb4715 | 7612 | |
267785bc | 7613 | /* If the instance variable has a different C type, we throw an error ... */ |
7614 | if (!comptypes (TREE_TYPE (property), type_of_ivar) | |
7615 | /* ... unless the property is readonly, in which case we allow | |
7616 | the instance variable to be more specialized (this means we | |
7617 | can generate the getter all right and it works). */ | |
7618 | && (!PROPERTY_READONLY (property) | |
7619 | || !objc_compare_types (TREE_TYPE (property), | |
7620 | type_of_ivar, -5, NULL_TREE))) | |
7621 | { | |
7622 | location_t original_location = DECL_SOURCE_LOCATION (ivar); | |
6bbb4715 | 7623 | |
267785bc | 7624 | error_at (location, "property %qs is using instance variable %qs of incompatible type", |
7625 | IDENTIFIER_POINTER (property_name), | |
7626 | IDENTIFIER_POINTER (ivar_name)); | |
6bbb4715 | 7627 | |
267785bc | 7628 | if (original_location != UNKNOWN_LOCATION) |
7629 | inform (original_location, "originally specified here"); | |
7630 | } | |
c450c529 | 7631 | |
267785bc | 7632 | /* If the instance variable is a bitfield, the property must be |
7633 | 'assign', 'nonatomic' because the runtime getter/setter helper | |
7634 | do not work with bitfield instance variables. */ | |
7635 | if (DECL_BIT_FIELD_TYPE (ivar)) | |
7636 | { | |
7637 | /* If there is an error, we return and not generate any | |
7638 | getter/setter because trying to set up the runtime | |
7639 | getter/setter helper calls with bitfields is at high risk | |
7640 | of ICE. */ | |
fc304191 | 7641 | |
267785bc | 7642 | if (PROPERTY_ASSIGN_SEMANTICS (property) != OBJC_PROPERTY_ASSIGN) |
7643 | { | |
7644 | location_t original_location = DECL_SOURCE_LOCATION (ivar); | |
6bbb4715 | 7645 | |
267785bc | 7646 | error_at (location, "'assign' property %qs is using bit-field instance variable %qs", |
7647 | IDENTIFIER_POINTER (property_name), | |
7648 | IDENTIFIER_POINTER (ivar_name)); | |
6bbb4715 | 7649 | |
267785bc | 7650 | if (original_location != UNKNOWN_LOCATION) |
7651 | inform (original_location, "originally specified here"); | |
7652 | return; | |
7653 | } | |
fc304191 | 7654 | |
267785bc | 7655 | if (!PROPERTY_NONATOMIC (property)) |
7656 | { | |
7657 | location_t original_location = DECL_SOURCE_LOCATION (ivar); | |
6bbb4715 | 7658 | |
267785bc | 7659 | error_at (location, "'atomic' property %qs is using bit-field instance variable %qs", |
7660 | IDENTIFIER_POINTER (property_name), | |
7661 | IDENTIFIER_POINTER (ivar_name)); | |
6bbb4715 | 7662 | |
267785bc | 7663 | if (original_location != UNKNOWN_LOCATION) |
7664 | inform (original_location, "originally specified here"); | |
7665 | return; | |
7666 | } | |
7667 | } | |
7668 | } | |
fc304191 | 7669 | |
267785bc | 7670 | /* Check that no other property is using the same instance |
7671 | variable. */ | |
7672 | for (x = IMPL_PROPERTY_DECL (objc_implementation_context); x; x = TREE_CHAIN (x)) | |
7673 | if (PROPERTY_IVAR_NAME (x) == ivar_name) | |
7674 | { | |
7675 | location_t original_location = DECL_SOURCE_LOCATION (x); | |
6bbb4715 | 7676 | |
267785bc | 7677 | error_at (location, "property %qs is using the same instance variable as property %qs", |
7678 | IDENTIFIER_POINTER (property_name), | |
7679 | IDENTIFIER_POINTER (PROPERTY_NAME (x))); | |
6bbb4715 | 7680 | |
267785bc | 7681 | if (original_location != UNKNOWN_LOCATION) |
7682 | inform (original_location, "originally specified here"); | |
6bbb4715 | 7683 | |
267785bc | 7684 | /* We keep going on. This won't cause the compiler to fail; |
7685 | the failure would most likely be at runtime. */ | |
7686 | } | |
fc304191 | 7687 | |
267785bc | 7688 | /* Note that a @synthesize (and only a @synthesize) always sets |
7689 | PROPERTY_IVAR_NAME to a non-NULL_TREE. You can recognize a | |
7690 | @synthesize by that. */ | |
7691 | PROPERTY_IVAR_NAME (property) = ivar_name; | |
6bbb4715 | 7692 | |
267785bc | 7693 | /* PROPERTY_SETTER_NAME and PROPERTY_GETTER_NAME are copied from the |
7694 | original declaration; they are always set (with the exception of | |
7695 | PROPERTY_SETTER_NAME not being set if PROPERTY_READONLY == 1). */ | |
fc304191 | 7696 | |
267785bc | 7697 | /* Add the property to the list of properties for current implementation. */ |
7698 | TREE_CHAIN (property) = IMPL_PROPERTY_DECL (objc_implementation_context); | |
7699 | IMPL_PROPERTY_DECL (objc_implementation_context) = property; | |
fc304191 | 7700 | |
267785bc | 7701 | /* Note how we don't actually synthesize the getter/setter here; it |
7702 | would be very natural, but we may miss the fact that the user has | |
7703 | implemented his own getter/setter later on in the @implementation | |
7704 | (in which case we shouldn't generate getter/setter). We wait | |
7705 | until we have parsed it all before generating the code. */ | |
7706 | } | |
fc304191 | 7707 | |
267785bc | 7708 | /* This function is called by the parser after a @synthesize |
7709 | expression is parsed. 'location' is the location of the | |
7710 | @synthesize expression, and 'property_and_ivar_list' is a chained | |
7711 | list of the property and ivar names. */ | |
7712 | void | |
7713 | objc_add_synthesize_declaration (location_t location, tree property_and_ivar_list) | |
7714 | { | |
7715 | tree interface, chain; | |
c17b85ea | 7716 | |
267785bc | 7717 | if (flag_objc1_only) |
7718 | error_at (input_location, "%<@synthesize%> is not available in Objective-C 1.0"); | |
99ff4160 | 7719 | |
267785bc | 7720 | if (property_and_ivar_list == error_mark_node) |
7721 | return; | |
945e49ce | 7722 | |
267785bc | 7723 | if (!objc_implementation_context) |
7724 | { | |
7725 | /* We can get here only in Objective-C; the Objective-C++ parser | |
7726 | detects the problem while parsing, outputs the error | |
7727 | "misplaced '@synthesize' Objective-C++ construct" and skips | |
7728 | the declaration. */ | |
7729 | error_at (location, "%<@synthesize%> not in @implementation context"); | |
7730 | return; | |
7731 | } | |
945e49ce | 7732 | |
267785bc | 7733 | if (TREE_CODE (objc_implementation_context) == CATEGORY_IMPLEMENTATION_TYPE) |
7734 | { | |
7735 | error_at (location, "%<@synthesize%> can not be used in categories"); | |
7736 | return; | |
7737 | } | |
6db57367 | 7738 | |
267785bc | 7739 | interface = lookup_interface (CLASS_NAME (objc_implementation_context)); |
7740 | if (!interface) | |
945e49ce | 7741 | { |
267785bc | 7742 | /* I can't see how this could happen, but it is good as a safety check. */ |
6bbb4715 | 7743 | error_at (location, |
267785bc | 7744 | "%<@synthesize%> requires the @interface of the class to be available"); |
7745 | return; | |
945e49ce | 7746 | } |
c17b85ea | 7747 | |
267785bc | 7748 | /* Now, iterate over the properties and do each of them. */ |
7749 | for (chain = property_and_ivar_list; chain; chain = TREE_CHAIN (chain)) | |
7750 | { | |
6bbb4715 | 7751 | objc_add_synthesize_declaration_for_property (location, interface, TREE_VALUE (chain), |
267785bc | 7752 | TREE_PURPOSE (chain)); |
7753 | } | |
c17b85ea | 7754 | } |
7755 | ||
267785bc | 7756 | /* This function is a sub-routine of objc_add_dynamic_declaration. It |
7757 | is called for each property to mark as dynamic once we have | |
7758 | determined that the context is Ok. */ | |
7759 | static void | |
7760 | objc_add_dynamic_declaration_for_property (location_t location, tree interface, | |
7761 | tree property_name) | |
39b8ddc6 | 7762 | { |
267785bc | 7763 | /* Find the @property declaration. */ |
7764 | tree property; | |
86c110ac | 7765 | |
267785bc | 7766 | /* Check that synthesize or dynamic has not already been used for |
7767 | the same property. */ | |
7768 | for (property = IMPL_PROPERTY_DECL (objc_implementation_context); property; property = TREE_CHAIN (property)) | |
7769 | if (PROPERTY_NAME (property) == property_name) | |
7770 | { | |
7771 | location_t original_location = DECL_SOURCE_LOCATION (property); | |
6bbb4715 | 7772 | |
267785bc | 7773 | if (PROPERTY_DYNAMIC (property)) |
6bbb4715 | 7774 | error_at (location, "property %qs already specified in %<@dynamic%>", |
267785bc | 7775 | IDENTIFIER_POINTER (property_name)); |
7776 | else | |
7777 | error_at (location, "property %qs already specified in %<@synthesize%>", | |
7778 | IDENTIFIER_POINTER (property_name)); | |
c17b85ea | 7779 | |
267785bc | 7780 | if (original_location != UNKNOWN_LOCATION) |
7781 | inform (original_location, "originally specified here"); | |
7782 | return; | |
7783 | } | |
0ced0389 | 7784 | |
267785bc | 7785 | /* Check that the property is declared in the interface. It could |
7786 | also be declared in a superclass or protocol. */ | |
7787 | property = lookup_property (interface, property_name); | |
c17b85ea | 7788 | |
267785bc | 7789 | if (!property) |
c17b85ea | 7790 | { |
267785bc | 7791 | error_at (location, "no declaration of property %qs found in the interface", |
7792 | IDENTIFIER_POINTER (property_name)); | |
7793 | return; | |
99ff4160 | 7794 | } |
267785bc | 7795 | else |
fc304191 | 7796 | { |
267785bc | 7797 | /* We have to copy the property, because we want to chain it to |
7798 | the implementation context, and we want to store the source | |
7799 | location of the @synthesize, not of the original | |
7800 | @property. */ | |
7801 | property = copy_node (property); | |
7802 | DECL_SOURCE_LOCATION (property) = location; | |
7803 | } | |
c450c529 | 7804 | |
267785bc | 7805 | /* Note that a @dynamic (and only a @dynamic) always sets |
7806 | PROPERTY_DYNAMIC to 1. You can recognize a @dynamic by that. | |
7807 | (actually, as explained above, PROPERTY_DECL generated by | |
7808 | @property and associated with a @dynamic property are also marked | |
7809 | as PROPERTY_DYNAMIC). */ | |
7810 | PROPERTY_DYNAMIC (property) = 1; | |
9e8a7e85 | 7811 | |
267785bc | 7812 | /* Add the property to the list of properties for current implementation. */ |
7813 | TREE_CHAIN (property) = IMPL_PROPERTY_DECL (objc_implementation_context); | |
7814 | IMPL_PROPERTY_DECL (objc_implementation_context) = property; | |
7815 | } | |
9e8a7e85 | 7816 | |
267785bc | 7817 | /* This function is called by the parser after a @dynamic expression |
7818 | is parsed. 'location' is the location of the @dynamic expression, | |
7819 | and 'property_list' is a chained list of all the property | |
7820 | names. */ | |
7821 | void | |
7822 | objc_add_dynamic_declaration (location_t location, tree property_list) | |
7823 | { | |
7824 | tree interface, chain; | |
c17b85ea | 7825 | |
267785bc | 7826 | if (flag_objc1_only) |
7827 | error_at (input_location, "%<@dynamic%> is not available in Objective-C 1.0"); | |
c450c529 | 7828 | |
267785bc | 7829 | if (property_list == error_mark_node) |
7830 | return; | |
c17b85ea | 7831 | |
267785bc | 7832 | if (!objc_implementation_context) |
7833 | { | |
7834 | /* We can get here only in Objective-C; the Objective-C++ parser | |
7835 | detects the problem while parsing, outputs the error | |
7836 | "misplaced '@dynamic' Objective-C++ construct" and skips the | |
7837 | declaration. */ | |
7838 | error_at (location, "%<@dynamic%> not in @implementation context"); | |
7839 | return; | |
6db57367 | 7840 | } |
c450c529 | 7841 | |
267785bc | 7842 | /* @dynamic is allowed in categories. */ |
7843 | switch (TREE_CODE (objc_implementation_context)) | |
9e8a7e85 | 7844 | { |
267785bc | 7845 | case CLASS_IMPLEMENTATION_TYPE: |
7846 | interface = lookup_interface (CLASS_NAME (objc_implementation_context)); | |
7847 | break; | |
7848 | case CATEGORY_IMPLEMENTATION_TYPE: | |
6bbb4715 | 7849 | interface = lookup_category (implementation_template, |
267785bc | 7850 | CLASS_SUPER_NAME (objc_implementation_context)); |
7851 | break; | |
7852 | default: | |
7853 | gcc_unreachable (); | |
7854 | } | |
9e8a7e85 | 7855 | |
267785bc | 7856 | if (!interface) |
7857 | { | |
7858 | /* I can't see how this could happen, but it is good as a safety check. */ | |
7859 | error_at (location, | |
7860 | "%<@dynamic%> requires the @interface of the class to be available"); | |
7861 | return; | |
9e8a7e85 | 7862 | } |
7863 | ||
267785bc | 7864 | /* Now, iterate over the properties and do each of them. */ |
7865 | for (chain = property_list; chain; chain = TREE_CHAIN (chain)) | |
fc304191 | 7866 | { |
267785bc | 7867 | objc_add_dynamic_declaration_for_property (location, interface, TREE_VALUE (chain)); |
7868 | } | |
7869 | } | |
39b8ddc6 | 7870 | |
6bbb4715 | 7871 | /* Main routine to generate code/data for all the property information for |
267785bc | 7872 | current implementation (class or category). CLASS is the interface where |
7873 | ivars are declared. CLASS_METHODS is where methods are found which | |
7874 | could be a class or a category depending on whether we are implementing | |
7875 | property of a class or a category. */ | |
9e8a7e85 | 7876 | |
267785bc | 7877 | static void |
7878 | objc_gen_property_data (tree klass, tree class_methods) | |
7879 | { | |
7880 | tree x; | |
8c582e4f | 7881 | |
267785bc | 7882 | for (x = IMPL_PROPERTY_DECL (objc_implementation_context); x; x = TREE_CHAIN (x)) |
7883 | { | |
7884 | /* @dynamic property - nothing to check or synthesize. */ | |
7885 | if (PROPERTY_DYNAMIC (x)) | |
7886 | continue; | |
6bbb4715 | 7887 | |
267785bc | 7888 | /* @synthesize property - need to synthesize the accessors. */ |
7889 | if (PROPERTY_IVAR_NAME (x)) | |
d67e8485 | 7890 | { |
267785bc | 7891 | objc_synthesize_getter (klass, class_methods, x); |
6bbb4715 | 7892 | |
267785bc | 7893 | if (PROPERTY_READONLY (x) == 0) |
7894 | objc_synthesize_setter (klass, class_methods, x); | |
7895 | ||
7896 | continue; | |
d67e8485 | 7897 | } |
8c582e4f | 7898 | |
267785bc | 7899 | gcc_unreachable (); |
7900 | } | |
7901 | } | |
fc304191 | 7902 | |
267785bc | 7903 | /* This is called once we see the "@end" in an interface/implementation. */ |
fc304191 | 7904 | |
267785bc | 7905 | static void |
7906 | finish_class (tree klass) | |
7907 | { | |
7908 | switch (TREE_CODE (klass)) | |
7909 | { | |
7910 | case CLASS_IMPLEMENTATION_TYPE: | |
7911 | { | |
7912 | /* All metadata generation is done in runtime.generate_metadata(). */ | |
6bbb4715 | 7913 | |
267785bc | 7914 | /* Generate what needed for property; setters, getters, etc. */ |
7915 | objc_gen_property_data (implementation_template, implementation_template); | |
146a801c | 7916 | |
267785bc | 7917 | if (implementation_template != objc_implementation_context) |
7918 | { | |
7919 | /* Ensure that all method listed in the interface contain bodies. */ | |
7920 | check_methods (CLASS_CLS_METHODS (implementation_template), | |
7921 | objc_implementation_context, '+'); | |
7922 | check_methods (CLASS_NST_METHODS (implementation_template), | |
7923 | objc_implementation_context, '-'); | |
146a801c | 7924 | |
267785bc | 7925 | if (CLASS_PROTOCOL_LIST (implementation_template)) |
7926 | check_protocols (CLASS_PROTOCOL_LIST (implementation_template), | |
7927 | "class", | |
7928 | CLASS_NAME (objc_implementation_context)); | |
7929 | } | |
7930 | break; | |
7931 | } | |
7932 | case CATEGORY_IMPLEMENTATION_TYPE: | |
7933 | { | |
7934 | tree category = lookup_category (implementation_template, CLASS_SUPER_NAME (klass)); | |
6bbb4715 | 7935 | |
267785bc | 7936 | if (category) |
7937 | { | |
7938 | /* Generate what needed for property; setters, getters, etc. */ | |
7939 | objc_gen_property_data (implementation_template, category); | |
fc304191 | 7940 | |
267785bc | 7941 | /* Ensure all method listed in the interface contain bodies. */ |
7942 | check_methods (CLASS_CLS_METHODS (category), | |
7943 | objc_implementation_context, '+'); | |
7944 | check_methods (CLASS_NST_METHODS (category), | |
7945 | objc_implementation_context, '-'); | |
6bbb4715 | 7946 | |
267785bc | 7947 | if (CLASS_PROTOCOL_LIST (category)) |
7948 | check_protocols (CLASS_PROTOCOL_LIST (category), | |
7949 | "category", | |
7950 | CLASS_SUPER_NAME (objc_implementation_context)); | |
7951 | } | |
7952 | break; | |
7953 | } | |
7954 | case CLASS_INTERFACE_TYPE: | |
7955 | case CATEGORY_INTERFACE_TYPE: | |
7956 | case PROTOCOL_INTERFACE_TYPE: | |
7957 | { | |
7958 | /* Process properties of the class. */ | |
7959 | tree x; | |
7960 | for (x = CLASS_PROPERTY_DECL (objc_interface_context); x; x = TREE_CHAIN (x)) | |
7961 | { | |
7962 | /* Now we check that the appropriate getter is declared, | |
7963 | and if not, we declare one ourselves. */ | |
7964 | tree getter_decl = lookup_method (CLASS_NST_METHODS (klass), | |
7965 | PROPERTY_GETTER_NAME (x)); | |
6bbb4715 | 7966 | |
267785bc | 7967 | if (getter_decl) |
7968 | { | |
7969 | /* TODO: Check that the declaration is consistent with the property. */ | |
7970 | ; | |
7971 | } | |
7972 | else | |
7973 | { | |
7974 | /* Generate an instance method declaration for the | |
7975 | getter; for example "- (id) name;". In general it | |
7976 | will be of the form | |
7977 | -(type)property_getter_name; */ | |
7978 | tree rettype = build_tree_list (NULL_TREE, TREE_TYPE (x)); | |
6bbb4715 | 7979 | getter_decl = build_method_decl (INSTANCE_METHOD_DECL, |
7980 | rettype, PROPERTY_GETTER_NAME (x), | |
267785bc | 7981 | NULL_TREE, false); |
7982 | if (PROPERTY_OPTIONAL (x)) | |
7983 | objc_add_method (objc_interface_context, getter_decl, false, true); | |
7984 | else | |
7985 | objc_add_method (objc_interface_context, getter_decl, false, false); | |
7986 | TREE_DEPRECATED (getter_decl) = TREE_DEPRECATED (x); | |
7987 | METHOD_PROPERTY_CONTEXT (getter_decl) = x; | |
7988 | } | |
fc304191 | 7989 | |
267785bc | 7990 | if (PROPERTY_READONLY (x) == 0) |
7991 | { | |
7992 | /* Now we check that the appropriate setter is declared, | |
7993 | and if not, we declare on ourselves. */ | |
6bbb4715 | 7994 | tree setter_decl = lookup_method (CLASS_NST_METHODS (klass), |
267785bc | 7995 | PROPERTY_SETTER_NAME (x)); |
6bbb4715 | 7996 | |
267785bc | 7997 | if (setter_decl) |
7998 | { | |
7999 | /* TODO: Check that the declaration is consistent with the property. */ | |
8000 | ; | |
8001 | } | |
8002 | else | |
8003 | { | |
8004 | /* The setter name is something like 'setName:'. | |
8005 | We need the substring 'setName' to build the | |
8006 | method declaration due to how the declaration | |
8007 | works. TODO: build_method_decl() will then | |
8008 | generate back 'setName:' from 'setName'; it | |
8009 | would be more efficient to hook into there. */ | |
8010 | const char *full_setter_name = IDENTIFIER_POINTER (PROPERTY_SETTER_NAME (x)); | |
8011 | size_t length = strlen (full_setter_name); | |
8012 | char *setter_name = (char *) alloca (length); | |
8013 | tree ret_type, selector, arg_type, arg_name; | |
6bbb4715 | 8014 | |
267785bc | 8015 | strcpy (setter_name, full_setter_name); |
8016 | setter_name[length - 1] = '\0'; | |
8017 | ret_type = build_tree_list (NULL_TREE, void_type_node); | |
8018 | arg_type = build_tree_list (NULL_TREE, TREE_TYPE (x)); | |
8019 | arg_name = get_identifier ("_value"); | |
8020 | selector = objc_build_keyword_decl (get_identifier (setter_name), | |
8021 | arg_type, arg_name, NULL); | |
6bbb4715 | 8022 | setter_decl = build_method_decl (INSTANCE_METHOD_DECL, |
267785bc | 8023 | ret_type, selector, |
8024 | build_tree_list (NULL_TREE, NULL_TREE), | |
8025 | false); | |
8026 | if (PROPERTY_OPTIONAL (x)) | |
8027 | objc_add_method (objc_interface_context, setter_decl, false, true); | |
8028 | else | |
8029 | objc_add_method (objc_interface_context, setter_decl, false, false); | |
8030 | TREE_DEPRECATED (setter_decl) = TREE_DEPRECATED (x); | |
8031 | METHOD_PROPERTY_CONTEXT (setter_decl) = x; | |
6bbb4715 | 8032 | } |
267785bc | 8033 | } |
8034 | } | |
8035 | break; | |
8036 | } | |
8037 | default: | |
8038 | gcc_unreachable (); | |
8039 | break; | |
8040 | } | |
fc304191 | 8041 | } |
fc304191 | 8042 | |
8043 | static tree | |
267785bc | 8044 | add_protocol (tree protocol) |
8045 | { | |
8046 | /* Put protocol on list in reverse order. */ | |
8047 | TREE_CHAIN (protocol) = protocol_chain; | |
8048 | protocol_chain = protocol; | |
8049 | return protocol_chain; | |
8050 | } | |
40d49b18 | 8051 | |
267785bc | 8052 | /* Check that a protocol is defined, and, recursively, that all |
8053 | protocols that this protocol conforms to are defined too. */ | |
8054 | static void | |
8055 | check_that_protocol_is_defined (tree protocol) | |
8056 | { | |
8057 | if (!PROTOCOL_DEFINED (protocol)) | |
8058 | warning (0, "definition of protocol %qE not found", | |
8059 | PROTOCOL_NAME (protocol)); | |
8060 | ||
8061 | /* If the protocol itself conforms to other protocols, check them | |
8062 | too, recursively. */ | |
8063 | if (PROTOCOL_LIST (protocol)) | |
fc304191 | 8064 | { |
267785bc | 8065 | tree p; |
40d49b18 | 8066 | |
267785bc | 8067 | for (p = PROTOCOL_LIST (protocol); p; p = TREE_CHAIN (p)) |
8068 | check_that_protocol_is_defined (TREE_VALUE (p)); | |
40d49b18 | 8069 | } |
c450c529 | 8070 | } |
40d49b18 | 8071 | |
267785bc | 8072 | /* Looks up a protocol. If 'warn_if_deprecated' is true, a warning is |
8073 | emitted if the protocol is deprecated. If 'definition_required' is | |
8074 | true, a warning is emitted if a full @protocol definition has not | |
8075 | been seen. */ | |
8076 | static tree | |
8077 | lookup_protocol (tree ident, bool warn_if_deprecated, bool definition_required) | |
c450c529 | 8078 | { |
267785bc | 8079 | tree chain; |
c450c529 | 8080 | |
267785bc | 8081 | for (chain = protocol_chain; chain; chain = TREE_CHAIN (chain)) |
8082 | if (ident == PROTOCOL_NAME (chain)) | |
8083 | { | |
8084 | if (warn_if_deprecated && TREE_DEPRECATED (chain)) | |
8085 | { | |
8086 | /* It would be nice to use warn_deprecated_use() here, but | |
8087 | we are using TREE_CHAIN (which is supposed to be the | |
8088 | TYPE_STUB_DECL for a TYPE) for something different. */ | |
6bbb4715 | 8089 | warning (OPT_Wdeprecated_declarations, "protocol %qE is deprecated", |
267785bc | 8090 | PROTOCOL_NAME (chain)); |
8091 | } | |
c450c529 | 8092 | |
267785bc | 8093 | if (definition_required) |
8094 | check_that_protocol_is_defined (chain); | |
c450c529 | 8095 | |
267785bc | 8096 | return chain; |
8097 | } | |
c450c529 | 8098 | |
267785bc | 8099 | return NULL_TREE; |
8100 | } | |
8101 | ||
8102 | /* This function forward declares the protocols named by NAMES. If | |
8103 | they are already declared or defined, the function has no effect. */ | |
8104 | ||
8105 | void | |
a758bf7d | 8106 | objc_declare_protocol (tree name, tree attributes) |
c450c529 | 8107 | { |
267785bc | 8108 | bool deprecated = false; |
c450c529 | 8109 | |
267785bc | 8110 | #ifdef OBJCPLUS |
8111 | if (current_namespace != global_namespace) { | |
8112 | error ("Objective-C declarations may only appear in global scope"); | |
8113 | } | |
8114 | #endif /* OBJCPLUS */ | |
8115 | ||
8116 | /* Determine if 'deprecated', the only attribute we recognize for | |
8117 | protocols, was used. Ignore all other attributes. */ | |
8118 | if (attributes) | |
c450c529 | 8119 | { |
267785bc | 8120 | tree attribute; |
8121 | for (attribute = attributes; attribute; attribute = TREE_CHAIN (attribute)) | |
8122 | { | |
8123 | tree name = TREE_PURPOSE (attribute); | |
6bbb4715 | 8124 | |
267785bc | 8125 | if (is_attribute_p ("deprecated", name)) |
8126 | deprecated = true; | |
8127 | else | |
8128 | warning (OPT_Wattributes, "%qE attribute directive ignored", name); | |
8129 | } | |
fc304191 | 8130 | } |
c450c529 | 8131 | |
a758bf7d | 8132 | if (lookup_protocol (name, /* warn if deprecated */ false, |
8133 | /* definition_required */ false) == NULL_TREE) | |
267785bc | 8134 | { |
a758bf7d | 8135 | tree protocol = make_node (PROTOCOL_INTERFACE_TYPE); |
6bbb4715 | 8136 | |
a758bf7d | 8137 | TYPE_LANG_SLOT_1 (protocol) |
8138 | = make_tree_vec (PROTOCOL_LANG_SLOT_ELTS); | |
8139 | PROTOCOL_NAME (protocol) = name; | |
8140 | PROTOCOL_LIST (protocol) = NULL_TREE; | |
8141 | add_protocol (protocol); | |
8142 | PROTOCOL_DEFINED (protocol) = 0; | |
8143 | PROTOCOL_FORWARD_DECL (protocol) = NULL_TREE; | |
6bbb4715 | 8144 | |
a758bf7d | 8145 | if (attributes) |
3e7fb307 | 8146 | { |
a758bf7d | 8147 | /* TODO: Do we need to store the attributes here ? */ |
8148 | TYPE_ATTRIBUTES (protocol) = attributes; | |
8149 | if (deprecated) | |
8150 | TREE_DEPRECATED (protocol) = 1; | |
267785bc | 8151 | } |
3e7fb307 | 8152 | } |
fc304191 | 8153 | } |
c450c529 | 8154 | |
267785bc | 8155 | static tree |
8156 | start_protocol (enum tree_code code, tree name, tree list, tree attributes) | |
fc304191 | 8157 | { |
267785bc | 8158 | tree protocol; |
8159 | bool deprecated = false; | |
fc304191 | 8160 | |
267785bc | 8161 | #ifdef OBJCPLUS |
8162 | if (current_namespace != global_namespace) { | |
8163 | error ("Objective-C declarations may only appear in global scope"); | |
8164 | } | |
8165 | #endif /* OBJCPLUS */ | |
fc304191 | 8166 | |
267785bc | 8167 | /* Determine if 'deprecated', the only attribute we recognize for |
8168 | protocols, was used. Ignore all other attributes. */ | |
8169 | if (attributes) | |
a70e45e3 | 8170 | { |
267785bc | 8171 | tree attribute; |
8172 | for (attribute = attributes; attribute; attribute = TREE_CHAIN (attribute)) | |
a70e45e3 | 8173 | { |
267785bc | 8174 | tree name = TREE_PURPOSE (attribute); |
6bbb4715 | 8175 | |
267785bc | 8176 | if (is_attribute_p ("deprecated", name)) |
8177 | deprecated = true; | |
8178 | else | |
8179 | warning (OPT_Wattributes, "%qE attribute directive ignored", name); | |
a70e45e3 | 8180 | } |
8181 | } | |
39b8ddc6 | 8182 | |
267785bc | 8183 | protocol = lookup_protocol (name, /* warn_if_deprecated */ false, |
8184 | /* definition_required */ false); | |
a70e45e3 | 8185 | |
267785bc | 8186 | if (!protocol) |
8187 | { | |
8188 | protocol = make_node (code); | |
8189 | TYPE_LANG_SLOT_1 (protocol) = make_tree_vec (PROTOCOL_LANG_SLOT_ELTS); | |
fc304191 | 8190 | |
267785bc | 8191 | PROTOCOL_NAME (protocol) = name; |
8192 | PROTOCOL_LIST (protocol) = lookup_and_install_protocols (list, /* definition_required */ false); | |
8193 | add_protocol (protocol); | |
8194 | PROTOCOL_DEFINED (protocol) = 1; | |
8195 | PROTOCOL_FORWARD_DECL (protocol) = NULL_TREE; | |
8dff6440 | 8196 | |
267785bc | 8197 | check_protocol_recursively (protocol, list); |
8198 | } | |
8199 | else if (! PROTOCOL_DEFINED (protocol)) | |
8200 | { | |
8201 | PROTOCOL_DEFINED (protocol) = 1; | |
8202 | PROTOCOL_LIST (protocol) = lookup_and_install_protocols (list, /* definition_required */ false); | |
fc304191 | 8203 | |
267785bc | 8204 | check_protocol_recursively (protocol, list); |
8205 | } | |
8206 | else | |
8207 | { | |
8208 | warning (0, "duplicate declaration for protocol %qE", | |
8209 | name); | |
8210 | } | |
fc304191 | 8211 | |
267785bc | 8212 | if (attributes) |
e5299e71 | 8213 | { |
267785bc | 8214 | TYPE_ATTRIBUTES (protocol) = attributes; |
8215 | if (deprecated) | |
8216 | TREE_DEPRECATED (protocol) = 1; | |
e5299e71 | 8217 | } |
fc304191 | 8218 | |
267785bc | 8219 | return protocol; |
fc304191 | 8220 | } |
39b8ddc6 | 8221 | |
267785bc | 8222 | /* Decay array and function parameters into pointers. */ |
39b8ddc6 | 8223 | |
267785bc | 8224 | static tree |
8225 | objc_decay_parm_type (tree type) | |
fc304191 | 8226 | { |
267785bc | 8227 | if (TREE_CODE (type) == ARRAY_TYPE || TREE_CODE (type) == FUNCTION_TYPE) |
8228 | type = build_pointer_type (TREE_CODE (type) == ARRAY_TYPE | |
8229 | ? TREE_TYPE (type) | |
8230 | : type); | |
e9e7c336 | 8231 | |
267785bc | 8232 | return type; |
fc304191 | 8233 | } |
8234 | ||
267785bc | 8235 | static GTY(()) tree objc_parmlist = NULL_TREE; |
e9e7c336 | 8236 | |
267785bc | 8237 | /* Append PARM to a list of formal parameters of a method, making a necessary |
8238 | array-to-pointer adjustment along the way. */ | |
8239 | ||
8240 | void | |
8241 | objc_push_parm (tree parm) | |
e9e7c336 | 8242 | { |
267785bc | 8243 | tree type; |
e9e7c336 | 8244 | |
267785bc | 8245 | if (TREE_TYPE (parm) == error_mark_node) |
e9e7c336 | 8246 | { |
267785bc | 8247 | objc_parmlist = chainon (objc_parmlist, parm); |
8248 | return; | |
e9e7c336 | 8249 | } |
e9e7c336 | 8250 | |
267785bc | 8251 | /* Decay arrays and functions into pointers. */ |
8252 | type = objc_decay_parm_type (TREE_TYPE (parm)); | |
e9e7c336 | 8253 | |
267785bc | 8254 | /* If the parameter type has been decayed, a new PARM_DECL needs to be |
8255 | built as well. */ | |
8256 | if (type != TREE_TYPE (parm)) | |
8257 | parm = build_decl (input_location, PARM_DECL, DECL_NAME (parm), type); | |
e9e7c336 | 8258 | |
267785bc | 8259 | DECL_ARG_TYPE (parm) |
8260 | = lang_hooks.types.type_promotes_to (TREE_TYPE (parm)); | |
e9e7c336 | 8261 | |
267785bc | 8262 | /* Record constancy and volatility. */ |
8263 | c_apply_type_quals_to_decl | |
8264 | ((TYPE_READONLY (TREE_TYPE (parm)) ? TYPE_QUAL_CONST : 0) | |
8265 | | (TYPE_RESTRICT (TREE_TYPE (parm)) ? TYPE_QUAL_RESTRICT : 0) | |
b560fabd | 8266 | | (TYPE_ATOMIC (TREE_TYPE (parm)) ? TYPE_QUAL_ATOMIC : 0) |
267785bc | 8267 | | (TYPE_VOLATILE (TREE_TYPE (parm)) ? TYPE_QUAL_VOLATILE : 0), parm); |
e9e7c336 | 8268 | |
267785bc | 8269 | objc_parmlist = chainon (objc_parmlist, parm); |
e9e7c336 | 8270 | } |
8271 | ||
267785bc | 8272 | /* Retrieve the formal parameter list constructed via preceding calls to |
8273 | objc_push_parm(). */ | |
4b89df4c | 8274 | |
267785bc | 8275 | #ifdef OBJCPLUS |
8276 | tree | |
4232a958 | 8277 | objc_get_parm_info (int have_ellipsis ATTRIBUTE_UNUSED, |
8278 | tree expr ATTRIBUTE_UNUSED) | |
fc304191 | 8279 | { |
267785bc | 8280 | tree parm_info = objc_parmlist; |
8281 | objc_parmlist = NULL_TREE; | |
fc304191 | 8282 | |
267785bc | 8283 | return parm_info; |
fc304191 | 8284 | } |
267785bc | 8285 | #else |
8286 | struct c_arg_info * | |
4232a958 | 8287 | objc_get_parm_info (int have_ellipsis, tree expr) |
fc304191 | 8288 | { |
267785bc | 8289 | tree parm_info = objc_parmlist; |
8290 | struct c_arg_info *arg_info; | |
8291 | /* The C front-end requires an elaborate song and dance at | |
8292 | this point. */ | |
8293 | push_scope (); | |
8294 | declare_parm_level (); | |
8295 | while (parm_info) | |
fc304191 | 8296 | { |
267785bc | 8297 | tree next = DECL_CHAIN (parm_info); |
fc304191 | 8298 | |
267785bc | 8299 | DECL_CHAIN (parm_info) = NULL_TREE; |
8300 | parm_info = pushdecl (parm_info); | |
8301 | finish_decl (parm_info, input_location, NULL_TREE, NULL_TREE, NULL_TREE); | |
8302 | parm_info = next; | |
fc304191 | 8303 | } |
4232a958 | 8304 | arg_info = get_parm_info (have_ellipsis, expr); |
267785bc | 8305 | pop_scope (); |
8306 | objc_parmlist = NULL_TREE; | |
8307 | return arg_info; | |
fc304191 | 8308 | } |
267785bc | 8309 | #endif |
fc304191 | 8310 | |
267785bc | 8311 | /* Synthesize the formal parameters 'id self' and 'SEL _cmd' needed for ObjC |
8312 | method definitions. In the case of instance methods, we can be more | |
8313 | specific as to the type of 'self'. */ | |
fc304191 | 8314 | |
267785bc | 8315 | static void |
8316 | synth_self_and_ucmd_args (void) | |
fc304191 | 8317 | { |
267785bc | 8318 | tree self_type; |
fc304191 | 8319 | |
267785bc | 8320 | if (objc_method_context |
8321 | && TREE_CODE (objc_method_context) == INSTANCE_METHOD_DECL) | |
8322 | self_type = objc_instance_type; | |
fc304191 | 8323 | else |
267785bc | 8324 | /* Really a `struct objc_class *'. However, we allow people to |
8325 | assign to self, which changes its type midstream. */ | |
8326 | self_type = objc_object_type; | |
fc304191 | 8327 | |
267785bc | 8328 | /* id self; */ |
8329 | objc_push_parm (build_decl (input_location, | |
8330 | PARM_DECL, self_id, self_type)); | |
a70e45e3 | 8331 | |
267785bc | 8332 | /* SEL _cmd; */ |
8333 | objc_push_parm (build_decl (input_location, | |
8334 | PARM_DECL, ucmd_id, objc_selector_type)); | |
fc304191 | 8335 | } |
8336 | ||
267785bc | 8337 | /* Transform an Objective-C method definition into a static C function |
8338 | definition, synthesizing the first two arguments, "self" and "_cmd", | |
4232a958 | 8339 | in the process. EXPR is NULL or an expression that needs to be |
8340 | evaluated for the side effects of array size expressions in the | |
8341 | parameters. */ | |
6db57367 | 8342 | |
267785bc | 8343 | static void |
4232a958 | 8344 | start_method_def (tree method, tree expr) |
fc304191 | 8345 | { |
267785bc | 8346 | tree parmlist; |
8347 | #ifdef OBJCPLUS | |
8348 | tree parm_info; | |
8349 | #else | |
8350 | struct c_arg_info *parm_info; | |
8351 | #endif | |
8352 | int have_ellipsis = 0; | |
fc304191 | 8353 | |
267785bc | 8354 | /* If we are defining a "dealloc" method in a non-root class, we |
8355 | will need to check if a [super dealloc] is missing, and warn if | |
8356 | it is. */ | |
8357 | if(CLASS_SUPER_NAME (objc_implementation_context) | |
8358 | && !strcmp ("dealloc", IDENTIFIER_POINTER (METHOD_SEL_NAME (method)))) | |
8359 | should_call_super_dealloc = 1; | |
8360 | else | |
8361 | should_call_super_dealloc = 0; | |
c17b85ea | 8362 | |
267785bc | 8363 | /* Required to implement _msgSuper. */ |
8364 | objc_method_context = method; | |
8365 | UOBJC_SUPER_decl = NULL_TREE; | |
fc304191 | 8366 | |
267785bc | 8367 | /* Generate prototype declarations for arguments..."new-style". */ |
8368 | synth_self_and_ucmd_args (); | |
c450c529 | 8369 | |
267785bc | 8370 | /* Generate argument declarations if a keyword_decl. */ |
8371 | parmlist = METHOD_SEL_ARGS (method); | |
8372 | while (parmlist) | |
8373 | { | |
8374 | /* parmlist is a KEYWORD_DECL. */ | |
8375 | tree type = TREE_VALUE (TREE_TYPE (parmlist)); | |
8376 | tree parm; | |
c17b85ea | 8377 | |
267785bc | 8378 | parm = build_decl (input_location, |
8379 | PARM_DECL, KEYWORD_ARG_NAME (parmlist), type); | |
8380 | decl_attributes (&parm, DECL_ATTRIBUTES (parmlist), 0); | |
8381 | objc_push_parm (parm); | |
8382 | parmlist = DECL_CHAIN (parmlist); | |
8383 | } | |
fc304191 | 8384 | |
267785bc | 8385 | if (METHOD_ADD_ARGS (method)) |
8386 | { | |
8387 | tree akey; | |
8388 | ||
8389 | for (akey = TREE_CHAIN (METHOD_ADD_ARGS (method)); | |
8390 | akey; akey = TREE_CHAIN (akey)) | |
c450c529 | 8391 | { |
267785bc | 8392 | objc_push_parm (TREE_VALUE (akey)); |
c450c529 | 8393 | } |
8394 | ||
267785bc | 8395 | if (METHOD_ADD_ARGS_ELLIPSIS_P (method)) |
8396 | have_ellipsis = 1; | |
fc304191 | 8397 | } |
fc304191 | 8398 | |
4232a958 | 8399 | parm_info = objc_get_parm_info (have_ellipsis, expr); |
fc304191 | 8400 | |
267785bc | 8401 | really_start_method (objc_method_context, parm_info); |
8402 | } | |
df6caf6c | 8403 | |
267785bc | 8404 | /* Return 1 if TYPE1 is equivalent to TYPE2 for purposes of method |
8405 | overloading. */ | |
8406 | static int | |
8407 | objc_types_are_equivalent (tree type1, tree type2) | |
945e49ce | 8408 | { |
267785bc | 8409 | if (type1 == type2) |
8410 | return 1; | |
945e49ce | 8411 | |
267785bc | 8412 | /* Strip away indirections. */ |
8413 | while ((TREE_CODE (type1) == ARRAY_TYPE || TREE_CODE (type1) == POINTER_TYPE) | |
8414 | && (TREE_CODE (type1) == TREE_CODE (type2))) | |
8415 | type1 = TREE_TYPE (type1), type2 = TREE_TYPE (type2); | |
8416 | if (TYPE_MAIN_VARIANT (type1) != TYPE_MAIN_VARIANT (type2)) | |
8417 | return 0; | |
945e49ce | 8418 | |
267785bc | 8419 | /* Compare the protocol lists. */ |
8420 | type1 = (TYPE_HAS_OBJC_INFO (type1) | |
8421 | ? TYPE_OBJC_PROTOCOL_LIST (type1) | |
8422 | : NULL_TREE); | |
8423 | type2 = (TYPE_HAS_OBJC_INFO (type2) | |
8424 | ? TYPE_OBJC_PROTOCOL_LIST (type2) | |
8425 | : NULL_TREE); | |
9436777e | 8426 | |
267785bc | 8427 | /* If there are no protocols (most common case), the types are |
8428 | identical. */ | |
8429 | if (type1 == NULL_TREE && type2 == NULL_TREE) | |
8430 | return 1; | |
6bbb4715 | 8431 | |
267785bc | 8432 | /* If one has protocols, and the other one hasn't, they are not |
8433 | identical. */ | |
8434 | if ((type1 == NULL_TREE && type2 != NULL_TREE) | |
8435 | || (type1 != NULL_TREE && type2 == NULL_TREE)) | |
8436 | return 0; | |
9436777e | 8437 | else |
9436777e | 8438 | { |
267785bc | 8439 | /* Else, both have protocols, and we need to do the full |
8440 | comparison. It is possible that either type1 or type2 | |
8441 | contain some duplicate protocols in the list, so we can't | |
8442 | even just compare list_length as a first check. */ | |
8443 | tree t; | |
9436777e | 8444 | |
267785bc | 8445 | for (t = type2; t; t = TREE_CHAIN (t)) |
8446 | if (!lookup_protocol_in_reflist (type1, TREE_VALUE (t))) | |
8447 | return 0; | |
6bbb4715 | 8448 | |
267785bc | 8449 | for (t = type1; t; t = TREE_CHAIN (t)) |
8450 | if (!lookup_protocol_in_reflist (type2, TREE_VALUE (t))) | |
8451 | return 0; | |
6bbb4715 | 8452 | |
267785bc | 8453 | return 1; |
9436777e | 8454 | } |
267785bc | 8455 | } |
9436777e | 8456 | |
267785bc | 8457 | /* Return 1 if TYPE1 has the same size and alignment as TYPE2. */ |
fc304191 | 8458 | |
267785bc | 8459 | static int |
8460 | objc_types_share_size_and_alignment (tree type1, tree type2) | |
8461 | { | |
8462 | return (simple_cst_equal (TYPE_SIZE (type1), TYPE_SIZE (type2)) | |
8463 | && TYPE_ALIGN (type1) == TYPE_ALIGN (type2)); | |
8464 | } | |
945e49ce | 8465 | |
267785bc | 8466 | /* Return 1 if PROTO1 is equivalent to PROTO2 |
8467 | for purposes of method overloading. Ordinarily, the type signatures | |
8468 | should match up exactly, unless STRICT is zero, in which case we | |
8469 | shall allow differences in which the size and alignment of a type | |
8470 | is the same. */ | |
945e49ce | 8471 | |
267785bc | 8472 | static int |
8473 | comp_proto_with_proto (tree proto1, tree proto2, int strict) | |
8474 | { | |
bfb15295 | 8475 | tree type1, type2; |
8476 | ||
267785bc | 8477 | /* The following test is needed in case there are hashing |
8478 | collisions. */ | |
8479 | if (METHOD_SEL_NAME (proto1) != METHOD_SEL_NAME (proto2)) | |
8480 | return 0; | |
945e49ce | 8481 | |
267785bc | 8482 | /* Compare return types. */ |
8483 | type1 = TREE_VALUE (TREE_TYPE (proto1)); | |
8484 | type2 = TREE_VALUE (TREE_TYPE (proto2)); | |
0ced0389 | 8485 | |
267785bc | 8486 | if (!objc_types_are_equivalent (type1, type2) |
8487 | && (strict || !objc_types_share_size_and_alignment (type1, type2))) | |
8488 | return 0; | |
8489 | ||
8490 | /* Compare argument types. */ | |
0ced0389 | 8491 | |
bfb15295 | 8492 | /* The first argument (objc_object_type) is always the same, no need |
8493 | to compare. */ | |
8494 | ||
8495 | /* The second argument (objc_selector_type) is always the same, no | |
8496 | need to compare. */ | |
8497 | ||
8498 | /* Compare the other arguments. */ | |
8499 | { | |
8500 | tree arg1, arg2; | |
8501 | ||
8502 | /* Compare METHOD_SEL_ARGS. */ | |
8503 | for (arg1 = METHOD_SEL_ARGS (proto1), arg2 = METHOD_SEL_ARGS (proto2); | |
8504 | arg1 && arg2; | |
8505 | arg1 = DECL_CHAIN (arg1), arg2 = DECL_CHAIN (arg2)) | |
8506 | { | |
8507 | type1 = TREE_VALUE (TREE_TYPE (arg1)); | |
8508 | type2 = TREE_VALUE (TREE_TYPE (arg2)); | |
6bbb4715 | 8509 | |
bfb15295 | 8510 | /* FIXME: Do we need to decay argument types to compare them ? */ |
8511 | type1 = objc_decay_parm_type (type1); | |
8512 | type2 = objc_decay_parm_type (type2); | |
6bbb4715 | 8513 | |
bfb15295 | 8514 | if (!objc_types_are_equivalent (type1, type2) |
8515 | && (strict || !objc_types_share_size_and_alignment (type1, type2))) | |
8516 | return 0; | |
8517 | } | |
6bbb4715 | 8518 | |
bfb15295 | 8519 | /* The loop ends when arg1 or arg2 are NULL. Make sure they are |
8520 | both NULL. */ | |
8521 | if (arg1 != arg2) | |
8522 | return 0; | |
8523 | ||
8524 | /* Compare METHOD_ADD_ARGS. */ | |
8525 | if ((METHOD_ADD_ARGS (proto1) && !METHOD_ADD_ARGS (proto2)) | |
8526 | || (METHOD_ADD_ARGS (proto2) && !METHOD_ADD_ARGS (proto1))) | |
8527 | return 0; | |
8528 | ||
8529 | if (METHOD_ADD_ARGS (proto1)) | |
8530 | { | |
8531 | for (arg1 = TREE_CHAIN (METHOD_ADD_ARGS (proto1)), arg2 = TREE_CHAIN (METHOD_ADD_ARGS (proto2)); | |
8532 | arg1 && arg2; | |
8533 | arg1 = TREE_CHAIN (arg1), arg2 = TREE_CHAIN (arg2)) | |
8534 | { | |
8535 | type1 = TREE_TYPE (TREE_VALUE (arg1)); | |
8536 | type2 = TREE_TYPE (TREE_VALUE (arg2)); | |
6bbb4715 | 8537 | |
bfb15295 | 8538 | /* FIXME: Do we need to decay argument types to compare them ? */ |
8539 | type1 = objc_decay_parm_type (type1); | |
8540 | type2 = objc_decay_parm_type (type2); | |
6bbb4715 | 8541 | |
bfb15295 | 8542 | if (!objc_types_are_equivalent (type1, type2) |
8543 | && (strict || !objc_types_share_size_and_alignment (type1, type2))) | |
8544 | return 0; | |
8545 | } | |
8546 | } | |
6bbb4715 | 8547 | |
bfb15295 | 8548 | /* The loop ends when arg1 or arg2 are NULL. Make sure they are |
8549 | both NULL. */ | |
8550 | if (arg1 != arg2) | |
8551 | return 0; | |
8552 | ||
8553 | /* Compare METHOD_ADD_ARGS_ELLIPSIS_P. */ | |
8554 | if (METHOD_ADD_ARGS_ELLIPSIS_P (proto1) != METHOD_ADD_ARGS_ELLIPSIS_P (proto2)) | |
8555 | return 0; | |
8556 | } | |
8557 | ||
8558 | /* Success. */ | |
8559 | return 1; | |
fc304191 | 8560 | } |
8561 | ||
267785bc | 8562 | /* This routine returns true if TYPE is a valid objc object type, |
8563 | suitable for messaging; false otherwise. If 'accept_class' is | |
8564 | 'true', then a Class object is considered valid for messaging and | |
8565 | 'true' is returned if 'type' refers to a Class. If 'accept_class' | |
8566 | is 'false', then a Class object is not considered valid for | |
8567 | messaging and 'false' is returned in that case. */ | |
8568 | ||
8569 | static bool | |
8570 | objc_type_valid_for_messaging (tree type, bool accept_classes) | |
fc304191 | 8571 | { |
267785bc | 8572 | if (!POINTER_TYPE_P (type)) |
8573 | return false; | |
e0ece38e | 8574 | |
267785bc | 8575 | /* Remove the pointer indirection; don't remove more than one |
8576 | otherwise we'd consider "NSObject **" a valid type for messaging, | |
8577 | which it isn't. */ | |
8578 | type = TREE_TYPE (type); | |
fc304191 | 8579 | |
267785bc | 8580 | if (TREE_CODE (type) != RECORD_TYPE) |
8581 | return false; | |
c450c529 | 8582 | |
267785bc | 8583 | if (objc_is_object_id (type)) |
8584 | return true; | |
c450c529 | 8585 | |
267785bc | 8586 | if (objc_is_class_id (type)) |
8587 | return accept_classes; | |
fc304191 | 8588 | |
267785bc | 8589 | if (TYPE_HAS_OBJC_INFO (type)) |
8590 | return true; | |
fc304191 | 8591 | |
267785bc | 8592 | return false; |
8593 | } | |
c17b85ea | 8594 | |
267785bc | 8595 | void |
8596 | objc_start_function (tree name, tree type, tree attrs, | |
8597 | #ifdef OBJCPLUS | |
8598 | tree params | |
8599 | #else | |
8600 | struct c_arg_info *params | |
8601 | #endif | |
8602 | ) | |
8603 | { | |
8604 | tree fndecl = build_decl (input_location, | |
8605 | FUNCTION_DECL, name, type); | |
fc304191 | 8606 | |
267785bc | 8607 | #ifdef OBJCPLUS |
8608 | DECL_ARGUMENTS (fndecl) = params; | |
8609 | DECL_INITIAL (fndecl) = error_mark_node; | |
8610 | DECL_EXTERNAL (fndecl) = 0; | |
8611 | TREE_STATIC (fndecl) = 1; | |
8612 | retrofit_lang_decl (fndecl); | |
8613 | cplus_decl_attributes (&fndecl, attrs, 0); | |
8614 | start_preparsed_function (fndecl, attrs, /*flags=*/SF_DEFAULT); | |
8615 | #else | |
8616 | current_function_returns_value = 0; /* Assume, until we see it does. */ | |
8617 | current_function_returns_null = 0; | |
8618 | decl_attributes (&fndecl, attrs, 0); | |
8619 | announce_function (fndecl); | |
8620 | DECL_INITIAL (fndecl) = error_mark_node; | |
8621 | DECL_EXTERNAL (fndecl) = 0; | |
8622 | TREE_STATIC (fndecl) = 1; | |
8623 | current_function_decl = pushdecl (fndecl); | |
8624 | push_scope (); | |
8625 | declare_parm_level (); | |
8626 | DECL_RESULT (current_function_decl) | |
8627 | = build_decl (input_location, | |
8628 | RESULT_DECL, NULL_TREE, | |
8629 | TREE_TYPE (TREE_TYPE (current_function_decl))); | |
8630 | DECL_ARTIFICIAL (DECL_RESULT (current_function_decl)) = 1; | |
8631 | DECL_IGNORED_P (DECL_RESULT (current_function_decl)) = 1; | |
8632 | start_fname_decls (); | |
8633 | store_parm_decls_from (params); | |
8634 | #endif | |
13dcc150 | 8635 | |
267785bc | 8636 | TREE_USED (current_function_decl) = 1; |
fc304191 | 8637 | } |
7fd68cee | 8638 | |
267785bc | 8639 | /* - Generate an identifier for the function. the format is "_n_cls", |
8640 | where 1 <= n <= nMethods, and cls is the name the implementation we | |
8641 | are processing. | |
8642 | - Install the return type from the method declaration. | |
8643 | - If we have a prototype, check for type consistency. */ | |
8644 | ||
8645 | static void | |
8646 | really_start_method (tree method, | |
8647 | #ifdef OBJCPLUS | |
8648 | tree parmlist | |
8649 | #else | |
8650 | struct c_arg_info *parmlist | |
8651 | #endif | |
8652 | ) | |
fc304191 | 8653 | { |
267785bc | 8654 | tree ret_type, meth_type; |
8655 | tree method_id; | |
8656 | const char *sel_name, *class_name, *cat_name; | |
8657 | char *buf; | |
fc304191 | 8658 | |
267785bc | 8659 | /* Synth the storage class & assemble the return type. */ |
8660 | ret_type = TREE_VALUE (TREE_TYPE (method)); | |
c450c529 | 8661 | |
267785bc | 8662 | sel_name = IDENTIFIER_POINTER (METHOD_SEL_NAME (method)); |
8663 | class_name = IDENTIFIER_POINTER (CLASS_NAME (objc_implementation_context)); | |
8664 | cat_name = ((TREE_CODE (objc_implementation_context) | |
8665 | == CLASS_IMPLEMENTATION_TYPE) | |
8666 | ? NULL | |
8667 | : IDENTIFIER_POINTER (CLASS_SUPER_NAME (objc_implementation_context))); | |
8668 | method_slot++; | |
c450c529 | 8669 | |
267785bc | 8670 | /* Make sure this is big enough for any plausible method label. */ |
8671 | buf = (char *) alloca (50 + strlen (sel_name) + strlen (class_name) | |
8672 | + (cat_name ? strlen (cat_name) : 0)); | |
fc304191 | 8673 | |
267785bc | 8674 | OBJC_GEN_METHOD_LABEL (buf, TREE_CODE (method) == INSTANCE_METHOD_DECL, |
8675 | class_name, cat_name, sel_name, method_slot); | |
8676 | ||
8677 | method_id = get_identifier (buf); | |
499ea517 | 8678 | |
8679 | #ifdef OBJCPLUS | |
267785bc | 8680 | /* Objective-C methods cannot be overloaded, so we don't need |
8681 | the type encoding appended. It looks bad anyway... */ | |
8682 | push_lang_context (lang_name_c); | |
499ea517 | 8683 | #endif |
8684 | ||
5318d5a9 | 8685 | meth_type = build_function_type_for_method (ret_type, method, METHOD_DEF, 0); |
267785bc | 8686 | objc_start_function (method_id, meth_type, NULL_TREE, parmlist); |
ed672485 | 8687 | |
267785bc | 8688 | /* Set self_decl from the first argument. */ |
8689 | self_decl = DECL_ARGUMENTS (current_function_decl); | |
fc304191 | 8690 | |
267785bc | 8691 | /* Suppress unused warnings. */ |
8692 | TREE_USED (self_decl) = 1; | |
8693 | DECL_READ_P (self_decl) = 1; | |
8694 | TREE_USED (DECL_CHAIN (self_decl)) = 1; | |
8695 | DECL_READ_P (DECL_CHAIN (self_decl)) = 1; | |
8696 | #ifdef OBJCPLUS | |
8697 | pop_lang_context (); | |
8698 | #endif | |
0ced0389 | 8699 | |
267785bc | 8700 | METHOD_DEFINITION (method) = current_function_decl; |
fc304191 | 8701 | |
267785bc | 8702 | /* Check consistency...start_function, pushdecl, duplicate_decls. */ |
fc304191 | 8703 | |
267785bc | 8704 | if (implementation_template != objc_implementation_context) |
8705 | { | |
8706 | tree proto | |
8707 | = lookup_method_static (implementation_template, | |
8708 | METHOD_SEL_NAME (method), | |
8709 | ((TREE_CODE (method) == CLASS_METHOD_DECL) | |
8710 | | OBJC_LOOKUP_NO_SUPER)); | |
2bd21a29 | 8711 | |
267785bc | 8712 | if (proto) |
8713 | { | |
8714 | if (!comp_proto_with_proto (method, proto, 1)) | |
8715 | { | |
8716 | bool type = TREE_CODE (method) == INSTANCE_METHOD_DECL; | |
499ea517 | 8717 | |
267785bc | 8718 | warning_at (DECL_SOURCE_LOCATION (method), 0, |
8719 | "conflicting types for %<%c%s%>", | |
8720 | (type ? '-' : '+'), | |
8721 | identifier_to_locale (gen_method_decl (method))); | |
8722 | inform (DECL_SOURCE_LOCATION (proto), | |
8723 | "previous declaration of %<%c%s%>", | |
8724 | (type ? '-' : '+'), | |
8725 | identifier_to_locale (gen_method_decl (proto))); | |
8726 | } | |
8727 | else | |
8728 | { | |
8729 | /* If the method in the @interface was deprecated, mark | |
8730 | the implemented method as deprecated too. It should | |
8731 | never be used for messaging (when the deprecation | |
8732 | warnings are produced), but just in case. */ | |
8733 | if (TREE_DEPRECATED (proto)) | |
8734 | TREE_DEPRECATED (method) = 1; | |
499ea517 | 8735 | |
267785bc | 8736 | /* If the method in the @interface was marked as |
8737 | 'noreturn', mark the function implementing the method | |
8738 | as 'noreturn' too. */ | |
8739 | TREE_THIS_VOLATILE (current_function_decl) = TREE_THIS_VOLATILE (proto); | |
8740 | } | |
8741 | } | |
8742 | else | |
8743 | { | |
8744 | /* We have a method @implementation even though we did not | |
8745 | see a corresponding @interface declaration (which is allowed | |
8746 | by Objective-C rules). Go ahead and place the method in | |
8747 | the @interface anyway, so that message dispatch lookups | |
8748 | will see it. */ | |
8749 | tree interface = implementation_template; | |
c450c529 | 8750 | |
267785bc | 8751 | if (TREE_CODE (objc_implementation_context) |
8752 | == CATEGORY_IMPLEMENTATION_TYPE) | |
8753 | interface = lookup_category | |
8754 | (interface, | |
8755 | CLASS_SUPER_NAME (objc_implementation_context)); | |
6db57367 | 8756 | |
267785bc | 8757 | if (interface) |
8758 | objc_add_method (interface, copy_node (method), | |
6bbb4715 | 8759 | TREE_CODE (method) == CLASS_METHOD_DECL, |
267785bc | 8760 | /* is_optional= */ false); |
fc304191 | 8761 | } |
fc304191 | 8762 | } |
fc304191 | 8763 | } |
7f5203a8 | 8764 | |
267785bc | 8765 | static void *UOBJC_SUPER_scope = 0; |
fc304191 | 8766 | |
267785bc | 8767 | /* _n_Method (id self, SEL sel, ...) |
8768 | { | |
8769 | struct objc_super _S; | |
8770 | _msgSuper ((_S.self = self, _S.class = _cls, &_S), ...); | |
8771 | } */ | |
8772 | ||
8773 | static tree | |
8774 | get_super_receiver (void) | |
fc304191 | 8775 | { |
267785bc | 8776 | if (objc_method_context) |
8777 | { | |
8778 | tree super_expr, super_expr_list, class_expr; | |
8779 | bool inst_meth; | |
8780 | if (!UOBJC_SUPER_decl) | |
8781 | { | |
8782 | UOBJC_SUPER_decl = build_decl (input_location, | |
8783 | VAR_DECL, get_identifier (TAG_SUPER), | |
8784 | objc_super_template); | |
8785 | /* This prevents `unused variable' warnings when compiling with -Wall. */ | |
8786 | TREE_USED (UOBJC_SUPER_decl) = 1; | |
8787 | DECL_READ_P (UOBJC_SUPER_decl) = 1; | |
8788 | lang_hooks.decls.pushdecl (UOBJC_SUPER_decl); | |
8789 | finish_decl (UOBJC_SUPER_decl, input_location, NULL_TREE, NULL_TREE, | |
6bbb4715 | 8790 | NULL_TREE); |
267785bc | 8791 | UOBJC_SUPER_scope = objc_get_current_scope (); |
8792 | } | |
7f5203a8 | 8793 | |
267785bc | 8794 | /* Set receiver to self. */ |
8795 | super_expr = objc_build_component_ref (UOBJC_SUPER_decl, self_id); | |
8796 | super_expr = build_modify_expr (input_location, super_expr, NULL_TREE, | |
8797 | NOP_EXPR, input_location, self_decl, | |
8798 | NULL_TREE); | |
8799 | super_expr_list = super_expr; | |
fc304191 | 8800 | |
267785bc | 8801 | /* Set class to begin searching. */ |
8802 | /* Get the ident for the superclass class field & build a ref to it. | |
8803 | ??? maybe we should just name the field the same for all runtimes. */ | |
8804 | super_expr = (*runtime.super_superclassfield_ident) (); | |
8805 | super_expr = objc_build_component_ref (UOBJC_SUPER_decl, super_expr); | |
9d9f5bb3 | 8806 | |
267785bc | 8807 | gcc_assert (imp_list->imp_context == objc_implementation_context |
8808 | && imp_list->imp_template == implementation_template); | |
8809 | inst_meth = (TREE_CODE (objc_method_context) == INSTANCE_METHOD_DECL); | |
8810 | ||
8811 | if (TREE_CODE (objc_implementation_context) == CLASS_IMPLEMENTATION_TYPE) | |
6bbb4715 | 8812 | class_expr = (*runtime.get_class_super_ref) (input_location, |
267785bc | 8813 | imp_list, inst_meth); |
8814 | else | |
8815 | /* We have a category. */ | |
fc304191 | 8816 | { |
267785bc | 8817 | tree super_name = CLASS_SUPER_NAME (imp_list->imp_template); |
8818 | tree super_class; | |
8819 | ||
8820 | /* Barf if super used in a category of a root object. */ | |
8821 | if (!super_name) | |
7f5203a8 | 8822 | { |
267785bc | 8823 | error ("no super class declared in interface for %qE", |
8824 | CLASS_NAME (imp_list->imp_template)); | |
8825 | return error_mark_node; | |
8826 | } | |
7f5203a8 | 8827 | |
6bbb4715 | 8828 | super_class = (*runtime.get_category_super_ref) (input_location, |
267785bc | 8829 | imp_list, inst_meth); |
6bbb4715 | 8830 | class_expr = build_c_cast (input_location, |
267785bc | 8831 | TREE_TYPE (super_expr), super_class); |
8832 | } | |
7f5203a8 | 8833 | |
6bbb4715 | 8834 | super_expr = build_modify_expr (input_location, super_expr, NULL_TREE, |
267785bc | 8835 | NOP_EXPR, |
8836 | input_location, class_expr, NULL_TREE); | |
7f5203a8 | 8837 | |
6bbb4715 | 8838 | super_expr_list = build_compound_expr (input_location, |
267785bc | 8839 | super_expr_list, super_expr); |
7f5203a8 | 8840 | |
6bbb4715 | 8841 | super_expr = build_unary_op (input_location, |
267785bc | 8842 | ADDR_EXPR, UOBJC_SUPER_decl, 0); |
8843 | super_expr_list = build_compound_expr (input_location, | |
8844 | super_expr_list, super_expr); | |
7f5203a8 | 8845 | |
267785bc | 8846 | return super_expr_list; |
8847 | } | |
8848 | else | |
8849 | { | |
8850 | error ("[super ...] must appear in a method context"); | |
8851 | return error_mark_node; | |
fc304191 | 8852 | } |
c450c529 | 8853 | } |
8854 | ||
267785bc | 8855 | /* When exiting a scope, sever links to a 'super' declaration (if any) |
8856 | therein contained. */ | |
b11c0115 | 8857 | |
267785bc | 8858 | void |
8859 | objc_clear_super_receiver (void) | |
c450c529 | 8860 | { |
267785bc | 8861 | if (objc_method_context |
a0aa15e7 | 8862 | && UOBJC_SUPER_scope == objc_get_current_scope ()) |
8863 | { | |
8864 | UOBJC_SUPER_decl = 0; | |
8865 | UOBJC_SUPER_scope = 0; | |
8866 | } | |
267785bc | 8867 | } |
e0ece38e | 8868 | |
267785bc | 8869 | void |
8870 | objc_finish_method_definition (tree fndecl) | |
8871 | { | |
8872 | /* We cannot validly inline ObjC methods, at least not without a language | |
8873 | extension to declare that a method need not be dynamically | |
8874 | dispatched, so suppress all thoughts of doing so. */ | |
8875 | DECL_UNINLINABLE (fndecl) = 1; | |
e0ece38e | 8876 | |
267785bc | 8877 | #ifndef OBJCPLUS |
8878 | /* The C++ front-end will have called finish_function() for us. */ | |
8879 | finish_function (); | |
8880 | #endif | |
8881 | ||
8882 | METHOD_ENCODING (objc_method_context) | |
8883 | = encode_method_prototype (objc_method_context); | |
8884 | ||
8885 | /* Required to implement _msgSuper. This must be done AFTER finish_function, | |
8886 | since the optimizer may find "may be used before set" errors. */ | |
8887 | objc_method_context = NULL_TREE; | |
8888 | ||
8889 | if (should_call_super_dealloc) | |
8890 | warning (0, "method possibly missing a [super dealloc] call"); | |
c450c529 | 8891 | } |
8892 | ||
267785bc | 8893 | /* Given a tree DECL node, produce a printable description of it in the given |
8894 | buffer, overwriting the buffer. */ | |
a8102dff | 8895 | |
267785bc | 8896 | static char * |
8897 | gen_declaration (tree decl) | |
a8102dff | 8898 | { |
267785bc | 8899 | errbuf[0] = '\0'; |
a8102dff | 8900 | |
267785bc | 8901 | if (DECL_P (decl)) |
a8102dff | 8902 | { |
267785bc | 8903 | gen_type_name_0 (TREE_TYPE (decl)); |
9d9f5bb3 | 8904 | |
267785bc | 8905 | if (DECL_NAME (decl)) |
a8102dff | 8906 | { |
267785bc | 8907 | if (!POINTER_TYPE_P (TREE_TYPE (decl))) |
8908 | strcat (errbuf, " "); | |
a8102dff | 8909 | |
267785bc | 8910 | strcat (errbuf, IDENTIFIER_POINTER (DECL_NAME (decl))); |
a8102dff | 8911 | } |
8912 | ||
267785bc | 8913 | if (DECL_INITIAL (decl) |
8914 | && TREE_CODE (DECL_INITIAL (decl)) == INTEGER_CST) | |
8915 | sprintf (errbuf + strlen (errbuf), ": " HOST_WIDE_INT_PRINT_DEC, | |
f9ae6f95 | 8916 | TREE_INT_CST_LOW (DECL_INITIAL (decl))); |
a8102dff | 8917 | } |
267785bc | 8918 | |
8919 | return errbuf; | |
a8102dff | 8920 | } |
8921 | ||
267785bc | 8922 | /* Given a tree TYPE node, produce a printable description of it in the given |
8923 | buffer, overwriting the buffer. */ | |
39b8ddc6 | 8924 | |
267785bc | 8925 | static char * |
8926 | gen_type_name_0 (tree type) | |
c450c529 | 8927 | { |
267785bc | 8928 | tree orig = type, proto; |
8929 | ||
8930 | if (TYPE_P (type) && TYPE_NAME (type)) | |
8931 | type = TYPE_NAME (type); | |
8932 | else if (POINTER_TYPE_P (type) || TREE_CODE (type) == ARRAY_TYPE) | |
c450c529 | 8933 | { |
267785bc | 8934 | tree inner = TREE_TYPE (type); |
c450c529 | 8935 | |
267785bc | 8936 | while (TREE_CODE (inner) == ARRAY_TYPE) |
8937 | inner = TREE_TYPE (inner); | |
c450c529 | 8938 | |
267785bc | 8939 | gen_type_name_0 (inner); |
39b8ddc6 | 8940 | |
267785bc | 8941 | if (!POINTER_TYPE_P (inner)) |
8942 | strcat (errbuf, " "); | |
3e1e20c1 | 8943 | |
267785bc | 8944 | if (POINTER_TYPE_P (type)) |
8945 | strcat (errbuf, "*"); | |
8946 | else | |
8947 | while (type != inner) | |
8948 | { | |
8949 | strcat (errbuf, "["); | |
b11c0115 | 8950 | |
267785bc | 8951 | if (TYPE_DOMAIN (type)) |
8952 | { | |
8953 | char sz[20]; | |
39b8ddc6 | 8954 | |
267785bc | 8955 | sprintf (sz, HOST_WIDE_INT_PRINT_DEC, |
f9ae6f95 | 8956 | (TREE_INT_CST_LOW |
267785bc | 8957 | (TYPE_MAX_VALUE (TYPE_DOMAIN (type))) + 1)); |
8958 | strcat (errbuf, sz); | |
8959 | } | |
39b8ddc6 | 8960 | |
267785bc | 8961 | strcat (errbuf, "]"); |
8962 | type = TREE_TYPE (type); | |
8963 | } | |
b11c0115 | 8964 | |
267785bc | 8965 | goto exit_function; |
b11c0115 | 8966 | } |
fc304191 | 8967 | |
267785bc | 8968 | if (TREE_CODE (type) == TYPE_DECL && DECL_NAME (type)) |
8969 | type = DECL_NAME (type); | |
c17b85ea | 8970 | |
267785bc | 8971 | strcat (errbuf, TREE_CODE (type) == IDENTIFIER_NODE |
6bbb4715 | 8972 | ? IDENTIFIER_POINTER (type) |
267785bc | 8973 | : ""); |
8974 | ||
8975 | /* For 'id' and 'Class', adopted protocols are stored in the pointee. */ | |
8976 | if (objc_is_id (orig)) | |
8977 | orig = TREE_TYPE (orig); | |
8978 | ||
8979 | proto = TYPE_HAS_OBJC_INFO (orig) ? TYPE_OBJC_PROTOCOL_LIST (orig) : NULL_TREE; | |
8980 | ||
8981 | if (proto) | |
e4a9e43e | 8982 | { |
267785bc | 8983 | strcat (errbuf, " <"); |
8984 | ||
8985 | while (proto) { | |
8986 | strcat (errbuf, | |
8987 | IDENTIFIER_POINTER (PROTOCOL_NAME (TREE_VALUE (proto)))); | |
8988 | proto = TREE_CHAIN (proto); | |
8989 | strcat (errbuf, proto ? ", " : ">"); | |
8990 | } | |
e4a9e43e | 8991 | } |
8992 | ||
267785bc | 8993 | exit_function: |
8994 | return errbuf; | |
8995 | } | |
8996 | ||
8997 | static char * | |
8998 | gen_type_name (tree type) | |
8999 | { | |
9000 | errbuf[0] = '\0'; | |
9001 | ||
9002 | return gen_type_name_0 (type); | |
9003 | } | |
9004 | ||
9005 | /* Given a method tree, put a printable description into the given | |
9006 | buffer (overwriting) and return a pointer to the buffer. */ | |
9007 | ||
9008 | static char * | |
9009 | gen_method_decl (tree method) | |
9010 | { | |
9011 | tree chain; | |
9012 | ||
9013 | strcpy (errbuf, "("); /* NB: Do _not_ call strcat() here. */ | |
9014 | gen_type_name_0 (TREE_VALUE (TREE_TYPE (method))); | |
9015 | strcat (errbuf, ")"); | |
9016 | chain = METHOD_SEL_ARGS (method); | |
9017 | ||
9018 | if (chain) | |
e16610d0 | 9019 | { |
267785bc | 9020 | /* We have a chain of keyword_decls. */ |
9021 | do | |
9022 | { | |
9023 | if (KEYWORD_KEY_NAME (chain)) | |
9024 | strcat (errbuf, IDENTIFIER_POINTER (KEYWORD_KEY_NAME (chain))); | |
9025 | ||
9026 | strcat (errbuf, ":("); | |
9027 | gen_type_name_0 (TREE_VALUE (TREE_TYPE (chain))); | |
9028 | strcat (errbuf, ")"); | |
9029 | ||
9030 | strcat (errbuf, IDENTIFIER_POINTER (KEYWORD_ARG_NAME (chain))); | |
9031 | if ((chain = DECL_CHAIN (chain))) | |
9032 | strcat (errbuf, " "); | |
9033 | } | |
9034 | while (chain); | |
9035 | ||
9036 | if (METHOD_ADD_ARGS (method)) | |
9037 | { | |
9038 | chain = TREE_CHAIN (METHOD_ADD_ARGS (method)); | |
9039 | ||
9040 | /* Know we have a chain of parm_decls. */ | |
9041 | while (chain) | |
9042 | { | |
9043 | strcat (errbuf, ", "); | |
9044 | gen_type_name_0 (TREE_TYPE (TREE_VALUE (chain))); | |
9045 | chain = TREE_CHAIN (chain); | |
9046 | } | |
9047 | ||
9048 | if (METHOD_ADD_ARGS_ELLIPSIS_P (method)) | |
9049 | strcat (errbuf, ", ..."); | |
9050 | } | |
e16610d0 | 9051 | } |
fc304191 | 9052 | |
267785bc | 9053 | else |
9054 | /* We have a unary selector. */ | |
9055 | strcat (errbuf, IDENTIFIER_POINTER (METHOD_SEL_NAME (method))); | |
9056 | ||
9057 | return errbuf; | |
9058 | } | |
9059 | \f | |
9060 | /* Debug info. */ | |
9061 | ||
9062 | ||
9063 | /* Dump an @interface declaration of the supplied class CHAIN to the | |
9064 | supplied file FP. Used to implement the -gen-decls option (which | |
9065 | prints out an @interface declaration of all classes compiled in | |
9066 | this run); potentially useful for debugging the compiler too. */ | |
9067 | void | |
9068 | dump_interface (FILE *fp, tree chain) | |
9069 | { | |
9070 | /* FIXME: A heap overflow here whenever a method (or ivar) | |
9071 | declaration is so long that it doesn't fit in the buffer. The | |
9072 | code and all the related functions should be rewritten to avoid | |
9073 | using fixed size buffers. */ | |
9074 | const char *my_name = IDENTIFIER_POINTER (CLASS_NAME (chain)); | |
9075 | tree ivar_decls = CLASS_RAW_IVARS (chain); | |
9076 | tree nst_methods = CLASS_NST_METHODS (chain); | |
9077 | tree cls_methods = CLASS_CLS_METHODS (chain); | |
9078 | ||
9079 | fprintf (fp, "\n@interface %s", my_name); | |
9080 | ||
9081 | /* CLASS_SUPER_NAME is used to store the superclass name for | |
9082 | classes, and the category name for categories. */ | |
9083 | if (CLASS_SUPER_NAME (chain)) | |
13dcc150 | 9084 | { |
267785bc | 9085 | const char *name = IDENTIFIER_POINTER (CLASS_SUPER_NAME (chain)); |
0ced0389 | 9086 | |
267785bc | 9087 | switch (TREE_CODE (chain)) |
0ced0389 | 9088 | { |
267785bc | 9089 | case CATEGORY_IMPLEMENTATION_TYPE: |
9090 | case CATEGORY_INTERFACE_TYPE: | |
9091 | fprintf (fp, " (%s)\n", name); | |
9092 | break; | |
9093 | default: | |
9094 | fprintf (fp, " : %s\n", name); | |
9095 | break; | |
0ced0389 | 9096 | } |
267785bc | 9097 | } |
9098 | else | |
9099 | fprintf (fp, "\n"); | |
9100 | ||
9101 | /* FIXME - the following doesn't seem to work at the moment. */ | |
9102 | if (ivar_decls) | |
9103 | { | |
9104 | fprintf (fp, "{\n"); | |
9105 | do | |
c1cfb0f5 | 9106 | { |
267785bc | 9107 | fprintf (fp, "\t%s;\n", gen_declaration (ivar_decls)); |
9108 | ivar_decls = TREE_CHAIN (ivar_decls); | |
c1cfb0f5 | 9109 | } |
267785bc | 9110 | while (ivar_decls); |
9111 | fprintf (fp, "}\n"); | |
13dcc150 | 9112 | } |
9113 | ||
267785bc | 9114 | while (nst_methods) |
e16610d0 | 9115 | { |
267785bc | 9116 | fprintf (fp, "- %s;\n", gen_method_decl (nst_methods)); |
9117 | nst_methods = TREE_CHAIN (nst_methods); | |
e16610d0 | 9118 | } |
fc304191 | 9119 | |
267785bc | 9120 | while (cls_methods) |
c450c529 | 9121 | { |
267785bc | 9122 | fprintf (fp, "+ %s;\n", gen_method_decl (cls_methods)); |
9123 | cls_methods = TREE_CHAIN (cls_methods); | |
c450c529 | 9124 | } |
9125 | ||
267785bc | 9126 | fprintf (fp, "@end\n"); |
9127 | } | |
c450c529 | 9128 | |
267785bc | 9129 | #if 0 |
9130 | /* Produce the pretty printing for an Objective-C method. This is | |
9131 | currently unused, but could be handy while reorganizing the pretty | |
9132 | printing to be more robust. */ | |
9133 | static const char * | |
9134 | objc_pretty_print_method (bool is_class_method, | |
9135 | const char *class_name, | |
9136 | const char *category_name, | |
9137 | const char *selector) | |
9138 | { | |
9139 | if (category_name) | |
9140 | { | |
6bbb4715 | 9141 | char *result = XNEWVEC (char, strlen (class_name) + strlen (category_name) |
267785bc | 9142 | + strlen (selector) + 7); |
fc304191 | 9143 | |
267785bc | 9144 | if (is_class_method) |
9145 | sprintf (result, "+[%s(%s) %s]", class_name, category_name, selector); | |
9146 | else | |
9147 | sprintf (result, "-[%s(%s) %s]", class_name, category_name, selector); | |
fc304191 | 9148 | |
267785bc | 9149 | return result; |
9150 | } | |
9151 | else | |
9152 | { | |
9153 | char *result = XNEWVEC (char, strlen (class_name) | |
9154 | + strlen (selector) + 5); | |
fc304191 | 9155 | |
267785bc | 9156 | if (is_class_method) |
9157 | sprintf (result, "+[%s %s]", class_name, selector); | |
9158 | else | |
9159 | sprintf (result, "-[%s %s]", class_name, selector); | |
fc304191 | 9160 | |
6bbb4715 | 9161 | return result; |
267785bc | 9162 | } |
9163 | } | |
9164 | #endif | |
fc304191 | 9165 | |
267785bc | 9166 | /* Demangle function for Objective-C. Attempt to demangle the |
9167 | function name associated with a method (eg, going from | |
9168 | "_i_NSObject__class" to "-[NSObject class]"); usually for the | |
9169 | purpose of pretty printing or error messages. Return the demangled | |
9170 | name, or NULL if the string is not an Objective-C mangled method | |
9171 | name. | |
9172 | ||
9173 | Because of how the mangling is done, any method that has a '_' in | |
9174 | its original name is at risk of being demangled incorrectly. In | |
9175 | some cases there are multiple valid ways to demangle a method name | |
9176 | and there is no way we can decide. | |
9177 | ||
9178 | TODO: objc_demangle() can't always get it right; the right way to | |
9179 | get this correct for all method names would be to store the | |
9180 | Objective-C method name somewhere in the function decl. Then, | |
9181 | there is no demangling to do; we'd just pull the method name out of | |
9182 | the decl. As an additional bonus, when printing error messages we | |
9183 | could check for such a method name, and if we find it, we know the | |
9184 | function is actually an Objective-C method and we could print error | |
9185 | messages saying "In method '+[NSObject class]" instead of "In | |
9186 | function '+[NSObject class]" as we do now. */ | |
9187 | static const char * | |
9188 | objc_demangle (const char *mangled) | |
9189 | { | |
9190 | char *demangled, *cp; | |
9191 | ||
9192 | /* First of all, if the name is too short it can't be an Objective-C | |
9193 | mangled method name. */ | |
9194 | if (mangled[0] == '\0' || mangled[1] == '\0' || mangled[2] == '\0') | |
9195 | return NULL; | |
9196 | ||
9197 | /* If the name looks like an already demangled one, return it | |
9198 | unchanged. This should only happen on Darwin, where method names | |
9199 | are mangled differently into a pretty-print form (such as | |
9200 | '+[NSObject class]', see darwin.h). In that case, demangling is | |
9201 | a no-op, but we need to return the demangled name if it was an | |
9202 | ObjC one, and return NULL if not. We should be safe as no C/C++ | |
9203 | function can start with "-[" or "+[". */ | |
9204 | if ((mangled[0] == '-' || mangled[0] == '+') | |
9205 | && (mangled[1] == '[')) | |
9206 | return mangled; | |
9207 | ||
9208 | if (mangled[0] == '_' && | |
9209 | (mangled[1] == 'i' || mangled[1] == 'c') && | |
9210 | mangled[2] == '_') | |
9211 | { | |
9212 | cp = demangled = XNEWVEC (char, strlen(mangled) + 2); | |
9213 | if (mangled[1] == 'i') | |
9214 | *cp++ = '-'; /* for instance method */ | |
9215 | else | |
9216 | *cp++ = '+'; /* for class method */ | |
9217 | *cp++ = '['; /* opening left brace */ | |
9218 | strcpy(cp, mangled+3); /* tack on the rest of the mangled name */ | |
9219 | while (*cp && *cp == '_') | |
9220 | cp++; /* skip any initial underbars in class name */ | |
9221 | cp = strchr(cp, '_'); /* find first non-initial underbar */ | |
9222 | if (cp == NULL) | |
29d8eac9 | 9223 | { |
267785bc | 9224 | free(demangled); /* not mangled name */ |
9225 | return NULL; | |
29d8eac9 | 9226 | } |
267785bc | 9227 | if (cp[1] == '_') /* easy case: no category name */ |
a8102dff | 9228 | { |
267785bc | 9229 | *cp++ = ' '; /* replace two '_' with one ' ' */ |
9230 | strcpy(cp, mangled + (cp - demangled) + 2); | |
a8102dff | 9231 | } |
fc304191 | 9232 | else |
c1cfb0f5 | 9233 | { |
267785bc | 9234 | *cp++ = '('; /* less easy case: category name */ |
9235 | cp = strchr(cp, '_'); | |
9236 | if (cp == 0) | |
c1cfb0f5 | 9237 | { |
267785bc | 9238 | free(demangled); /* not mangled name */ |
9239 | return NULL; | |
c1cfb0f5 | 9240 | } |
267785bc | 9241 | *cp++ = ')'; |
9242 | *cp++ = ' '; /* overwriting 1st char of method name... */ | |
9243 | strcpy(cp, mangled + (cp - demangled)); /* get it back */ | |
c1cfb0f5 | 9244 | } |
267785bc | 9245 | /* Now we have the method name. We need to generally replace |
9246 | '_' with ':' but trying to preserve '_' if it could only have | |
9247 | been in the mangled string because it was already in the | |
9248 | original name. In cases where it's ambiguous, we assume that | |
9249 | any '_' originated from a ':'. */ | |
e0ece38e | 9250 | |
267785bc | 9251 | /* Initial '_'s in method name can't have been generating by |
9252 | converting ':'s. Skip them. */ | |
9253 | while (*cp && *cp == '_') | |
9254 | cp++; | |
c1cfb0f5 | 9255 | |
267785bc | 9256 | /* If the method name does not end with '_', then it has no |
9257 | arguments and there was no replacement of ':'s with '_'s | |
9258 | during mangling. Check for that case, and skip any | |
9259 | replacement if so. This at least guarantees that methods | |
9260 | with no arguments are always demangled correctly (unless the | |
9261 | original name ends with '_'). */ | |
9262 | if (*(mangled + strlen (mangled) - 1) != '_') | |
9263 | { | |
9264 | /* Skip to the end. */ | |
9265 | for (; *cp; cp++) | |
9266 | ; | |
9267 | } | |
9268 | else | |
9269 | { | |
9270 | /* Replace remaining '_' with ':'. This may get it wrong if | |
9271 | there were '_'s in the original name. In most cases it | |
9272 | is impossible to disambiguate. */ | |
9273 | for (; *cp; cp++) | |
9274 | if (*cp == '_') | |
6bbb4715 | 9275 | *cp = ':'; |
267785bc | 9276 | } |
9277 | *cp++ = ']'; /* closing right brace */ | |
9278 | *cp++ = 0; /* string terminator */ | |
9279 | return demangled; | |
9280 | } | |
9281 | else | |
9282 | return NULL; /* not an objc mangled name */ | |
9283 | } | |
e16610d0 | 9284 | |
267785bc | 9285 | /* Try to pretty-print a decl. If the 'decl' is an Objective-C |
9286 | specific decl, return the printable name for it. If not, return | |
9287 | NULL. */ | |
9288 | const char * | |
9289 | objc_maybe_printable_name (tree decl, int v ATTRIBUTE_UNUSED) | |
9290 | { | |
9291 | switch (TREE_CODE (decl)) | |
9292 | { | |
9293 | case FUNCTION_DECL: | |
9294 | return objc_demangle (IDENTIFIER_POINTER (DECL_NAME (decl))); | |
29d8eac9 | 9295 | break; |
fc304191 | 9296 | |
267785bc | 9297 | /* The following happens when we are printing a deprecation |
9298 | warning for a method. The warn_deprecation() will end up | |
9299 | trying to print the decl for INSTANCE_METHOD_DECL or | |
9300 | CLASS_METHOD_DECL. It would be nice to be able to print | |
9301 | "-[NSObject autorelease] is deprecated", but to do that, we'd | |
9302 | need to store the class and method name in the method decl, | |
9303 | which we currently don't do. For now, just return the name | |
9304 | of the method. We don't return NULL, because that may | |
9305 | trigger further attempts to pretty-print the decl in C/C++, | |
9306 | but they wouldn't know how to pretty-print it. */ | |
9307 | case INSTANCE_METHOD_DECL: | |
9308 | case CLASS_METHOD_DECL: | |
9309 | return IDENTIFIER_POINTER (DECL_NAME (decl)); | |
9310 | break; | |
9311 | /* This happens when printing a deprecation warning for a | |
9312 | property. We may want to consider some sort of pretty | |
9313 | printing (eg, include the class name where it was declared | |
9314 | ?). */ | |
9315 | case PROPERTY_DECL: | |
9316 | return IDENTIFIER_POINTER (PROPERTY_NAME (decl)); | |
29d8eac9 | 9317 | break; |
9318 | default: | |
267785bc | 9319 | return NULL; |
9320 | break; | |
fc304191 | 9321 | } |
fc304191 | 9322 | } |
9323 | ||
267785bc | 9324 | /* Return a printable name for 'decl'. This first tries |
9325 | objc_maybe_printable_name(), and if that fails, it returns the name | |
9326 | in the decl. This is used as LANG_HOOKS_DECL_PRINTABLE_NAME for | |
9327 | Objective-C; in Objective-C++, setting the hook is not enough | |
9328 | because lots of C++ Front-End code calls cxx_printable_name, | |
9329 | dump_decl and other C++ functions directly. So instead we have | |
9330 | modified dump_decl to call objc_maybe_printable_name directly. */ | |
9331 | const char * | |
9332 | objc_printable_name (tree decl, int v) | |
9333 | { | |
9334 | const char *demangled_name = objc_maybe_printable_name (decl, v); | |
fc304191 | 9335 | |
267785bc | 9336 | if (demangled_name != NULL) |
9337 | return demangled_name; | |
9338 | else | |
9339 | return IDENTIFIER_POINTER (DECL_NAME (decl)); | |
9340 | } | |
fc304191 | 9341 | |
6bbb4715 | 9342 | /* Routine is called to issue diagnostic when reference to a private |
9343 | ivar is made and no other variable with same name is found in | |
267785bc | 9344 | current scope. */ |
9345 | bool | |
9346 | objc_diagnose_private_ivar (tree id) | |
9347 | { | |
9348 | tree ivar; | |
9349 | if (!objc_method_context) | |
9350 | return false; | |
9351 | ivar = is_ivar (objc_ivar_chain, id); | |
9352 | if (ivar && is_private (ivar)) | |
9353 | { | |
6bbb4715 | 9354 | error ("instance variable %qs is declared private", |
267785bc | 9355 | IDENTIFIER_POINTER (id)); |
9356 | return true; | |
9357 | } | |
9358 | return false; | |
9359 | } | |
fc304191 | 9360 | |
267785bc | 9361 | /* Look up ID as an instance variable. OTHER contains the result of |
9362 | the C or C++ lookup, which we may want to use instead. */ | |
9363 | /* To use properties inside an instance method, use self.property. */ | |
9364 | tree | |
9365 | objc_lookup_ivar (tree other, tree id) | |
9366 | { | |
9367 | tree ivar; | |
fc304191 | 9368 | |
267785bc | 9369 | /* If we are not inside of an ObjC method, ivar lookup makes no sense. */ |
9370 | if (!objc_method_context) | |
9371 | return other; | |
fc304191 | 9372 | |
267785bc | 9373 | if (!strcmp (IDENTIFIER_POINTER (id), "super")) |
9374 | /* We have a message to super. */ | |
9375 | return get_super_receiver (); | |
fc304191 | 9376 | |
267785bc | 9377 | /* In a class method, look up an instance variable only as a last |
9378 | resort. */ | |
9379 | if (TREE_CODE (objc_method_context) == CLASS_METHOD_DECL | |
9380 | && other && other != error_mark_node) | |
9381 | return other; | |
9382 | ||
06511efd | 9383 | /* Don't look up the ivar if the user has explicitly advised against |
9384 | it with -fno-local-ivars. */ | |
9385 | ||
9386 | if (!flag_local_ivars) | |
9387 | return other; | |
9388 | ||
267785bc | 9389 | /* Look up the ivar, but do not use it if it is not accessible. */ |
9390 | ivar = is_ivar (objc_ivar_chain, id); | |
6bbb4715 | 9391 | |
267785bc | 9392 | if (!ivar || is_private (ivar)) |
9393 | return other; | |
9394 | ||
9395 | /* In an instance method, a local variable (or parameter) may hide the | |
9396 | instance variable. */ | |
9397 | if (TREE_CODE (objc_method_context) == INSTANCE_METHOD_DECL | |
9398 | && other && other != error_mark_node | |
13dcc150 | 9399 | #ifdef OBJCPLUS |
267785bc | 9400 | && CP_DECL_CONTEXT (other) != global_namespace) |
9401 | #else | |
9402 | && !DECL_FILE_SCOPE_P (other)) | |
9403 | #endif | |
9404 | { | |
06511efd | 9405 | if (warn_shadow_ivar == 1 || (warn_shadow && warn_shadow_ivar != 0)) { |
9406 | warning (warn_shadow_ivar ? OPT_Wshadow_ivar : OPT_Wshadow, | |
9407 | "local declaration of %qE hides instance variable", id); | |
9408 | } | |
9409 | ||
267785bc | 9410 | return other; |
fc304191 | 9411 | } |
fc304191 | 9412 | |
267785bc | 9413 | /* At this point, we are either in an instance method with no obscuring |
9414 | local definitions, or in a class method with no alternate definitions | |
9415 | at all. */ | |
9416 | return build_ivar_reference (id); | |
86c110ac | 9417 | } |
9418 | ||
267785bc | 9419 | /* Possibly rewrite a function CALL into an OBJ_TYPE_REF expression. This |
9420 | needs to be done if we are calling a function through a cast. */ | |
9421 | ||
9422 | tree | |
9423 | objc_rewrite_function_call (tree function, tree first_param) | |
7fd68cee | 9424 | { |
267785bc | 9425 | if (TREE_CODE (function) == NOP_EXPR |
9426 | && TREE_CODE (TREE_OPERAND (function, 0)) == ADDR_EXPR | |
9427 | && TREE_CODE (TREE_OPERAND (TREE_OPERAND (function, 0), 0)) | |
9428 | == FUNCTION_DECL) | |
9429 | { | |
9430 | function = build3 (OBJ_TYPE_REF, TREE_TYPE (function), | |
9431 | TREE_OPERAND (function, 0), | |
9432 | first_param, size_zero_node); | |
9433 | } | |
7fd68cee | 9434 | |
267785bc | 9435 | return function; |
9436 | } | |
7fd68cee | 9437 | |
267785bc | 9438 | /* This is called to "gimplify" a PROPERTY_REF node. It builds the |
9439 | corresponding 'getter' function call. Note that we assume the | |
9440 | PROPERTY_REF to be valid since we generated it while parsing. */ | |
9441 | static void | |
9442 | objc_gimplify_property_ref (tree *expr_p) | |
9443 | { | |
9444 | tree getter = PROPERTY_REF_GETTER_CALL (*expr_p); | |
9445 | tree call_exp; | |
7fd68cee | 9446 | |
267785bc | 9447 | if (getter == NULL_TREE) |
7fd68cee | 9448 | { |
267785bc | 9449 | tree property_decl = PROPERTY_REF_PROPERTY_DECL (*expr_p); |
9450 | /* This can happen if DECL_ARTIFICIAL (*expr_p), but | |
9451 | should be impossible for real properties, which always | |
9452 | have a getter. */ | |
9453 | error_at (EXPR_LOCATION (*expr_p), "no %qs getter found", | |
9454 | IDENTIFIER_POINTER (PROPERTY_NAME (property_decl))); | |
9455 | /* Try to recover from the error to prevent an ICE. We take | |
9456 | zero and cast it to the type of the property. */ | |
9457 | *expr_p = convert (TREE_TYPE (property_decl), | |
9458 | integer_zero_node); | |
9459 | return; | |
7fd68cee | 9460 | } |
7fd68cee | 9461 | |
267785bc | 9462 | if (PROPERTY_REF_DEPRECATED_GETTER (*expr_p)) |
9463 | { | |
9464 | /* PROPERTY_REF_DEPRECATED_GETTER contains the method prototype | |
9465 | that is deprecated. */ | |
9466 | warn_deprecated_use (PROPERTY_REF_DEPRECATED_GETTER (*expr_p), | |
9467 | NULL_TREE); | |
7fd68cee | 9468 | } |
7fd68cee | 9469 | |
267785bc | 9470 | call_exp = getter; |
9471 | #ifdef OBJCPLUS | |
9472 | /* In C++, a getter which returns an aggregate value results in a | |
9473 | target_expr which initializes a temporary to the call | |
9474 | expression. */ | |
9475 | if (TREE_CODE (getter) == TARGET_EXPR) | |
7fd68cee | 9476 | { |
267785bc | 9477 | gcc_assert (MAYBE_CLASS_TYPE_P (TREE_TYPE (getter))); |
9478 | gcc_assert (TREE_CODE (TREE_OPERAND (getter, 0)) == VAR_DECL); | |
9479 | call_exp = TREE_OPERAND (getter, 1); | |
7fd68cee | 9480 | } |
267785bc | 9481 | #endif |
9482 | gcc_assert (TREE_CODE (call_exp) == CALL_EXPR); | |
6bbb4715 | 9483 | |
267785bc | 9484 | *expr_p = call_exp; |
7fd68cee | 9485 | } |
9486 | ||
267785bc | 9487 | /* This is called when "gimplifying" the trees. We need to gimplify |
9488 | the Objective-C/Objective-C++ specific trees, then hand over the | |
9489 | process to C/C++. */ | |
9490 | int | |
9491 | objc_gimplify_expr (tree *expr_p, gimple_seq *pre_p, gimple_seq *post_p) | |
86c110ac | 9492 | { |
267785bc | 9493 | enum tree_code code = TREE_CODE (*expr_p); |
9494 | switch (code) | |
7fd68cee | 9495 | { |
267785bc | 9496 | /* Look for the special case of OBJC_TYPE_REF with the address |
9497 | of a function in OBJ_TYPE_REF_EXPR (presumably objc_msgSend | |
9498 | or one of its cousins). */ | |
9499 | case OBJ_TYPE_REF: | |
9500 | if (TREE_CODE (OBJ_TYPE_REF_EXPR (*expr_p)) == ADDR_EXPR | |
9501 | && TREE_CODE (TREE_OPERAND (OBJ_TYPE_REF_EXPR (*expr_p), 0)) | |
9502 | == FUNCTION_DECL) | |
7fd68cee | 9503 | { |
267785bc | 9504 | enum gimplify_status r0, r1; |
7fd68cee | 9505 | |
267785bc | 9506 | /* Postincrements in OBJ_TYPE_REF_OBJECT don't affect the |
9507 | value of the OBJ_TYPE_REF, so force them to be emitted | |
9508 | during subexpression evaluation rather than after the | |
9509 | OBJ_TYPE_REF. This permits objc_msgSend calls in | |
9510 | Objective C to use direct rather than indirect calls when | |
9511 | the object expression has a postincrement. */ | |
9512 | r0 = gimplify_expr (&OBJ_TYPE_REF_OBJECT (*expr_p), pre_p, NULL, | |
9513 | is_gimple_val, fb_rvalue); | |
9514 | r1 = gimplify_expr (&OBJ_TYPE_REF_EXPR (*expr_p), pre_p, post_p, | |
9515 | is_gimple_val, fb_rvalue); | |
6bbb4715 | 9516 | |
267785bc | 9517 | return MIN (r0, r1); |
7fd68cee | 9518 | } |
9519 | break; | |
267785bc | 9520 | case PROPERTY_REF: |
9521 | objc_gimplify_property_ref (expr_p); | |
9522 | /* Do not return yet; let C/C++ gimplify the resulting expression. */ | |
9523 | break; | |
7fd68cee | 9524 | default: |
267785bc | 9525 | break; |
7fd68cee | 9526 | } |
9d9f5bb3 | 9527 | |
86c110ac | 9528 | #ifdef OBJCPLUS |
267785bc | 9529 | return (enum gimplify_status) cp_gimplify_expr (expr_p, pre_p, post_p); |
86c110ac | 9530 | #else |
267785bc | 9531 | return (enum gimplify_status) c_gimplify_expr (expr_p, pre_p, post_p); |
86c110ac | 9532 | #endif |
86c110ac | 9533 | } |
9534 | ||
267785bc | 9535 | /* --- FAST ENUMERATION --- */ |
9536 | /* Begin code generation for fast enumeration (foreach) ... */ | |
86c110ac | 9537 | |
267785bc | 9538 | /* Defines |
86c110ac | 9539 | |
267785bc | 9540 | struct __objcFastEnumerationState |
9541 | { | |
9542 | unsigned long state; | |
9543 | id *itemsPtr; | |
9544 | unsigned long *mutationsPtr; | |
9545 | unsigned long extra[5]; | |
9546 | }; | |
86c110ac | 9547 | |
267785bc | 9548 | Confusingly enough, NSFastEnumeration is then defined by libraries |
6bbb4715 | 9549 | to be the same structure. |
267785bc | 9550 | */ |
86c110ac | 9551 | |
267785bc | 9552 | static void |
9553 | build_fast_enumeration_state_template (void) | |
9554 | { | |
9555 | tree decls, *chain = NULL; | |
9d9f5bb3 | 9556 | |
267785bc | 9557 | /* { */ |
6bbb4715 | 9558 | objc_fast_enumeration_state_template = objc_start_struct (get_identifier |
267785bc | 9559 | (TAG_FAST_ENUMERATION_STATE)); |
86c110ac | 9560 | |
267785bc | 9561 | /* unsigned long state; */ |
9562 | decls = add_field_decl (long_unsigned_type_node, "state", &chain); | |
9d9f5bb3 | 9563 | |
267785bc | 9564 | /* id *itemsPtr; */ |
6bbb4715 | 9565 | add_field_decl (build_pointer_type (objc_object_type), |
267785bc | 9566 | "itemsPtr", &chain); |
9d9f5bb3 | 9567 | |
267785bc | 9568 | /* unsigned long *mutationsPtr; */ |
6bbb4715 | 9569 | add_field_decl (build_pointer_type (long_unsigned_type_node), |
267785bc | 9570 | "mutationsPtr", &chain); |
7fd68cee | 9571 | |
267785bc | 9572 | /* unsigned long extra[5]; */ |
6bbb4715 | 9573 | add_field_decl (build_sized_array_type (long_unsigned_type_node, 5), |
267785bc | 9574 | "extra", &chain); |
7fd68cee | 9575 | |
267785bc | 9576 | /* } */ |
9577 | objc_finish_struct (objc_fast_enumeration_state_template, decls); | |
9578 | } | |
7fd68cee | 9579 | |
267785bc | 9580 | /* |
9581 | 'objc_finish_foreach_loop()' generates the code for an Objective-C | |
9582 | foreach loop. The 'location' argument is the location of the 'for' | |
9583 | that starts the loop. The 'object_expression' is the expression of | |
9584 | the 'object' that iterates; the 'collection_expression' is the | |
9585 | expression of the collection that we iterate over (we need to make | |
9586 | sure we evaluate this only once); the 'for_body' is the set of | |
9587 | statements to be executed in each iteration; 'break_label' and | |
9588 | 'continue_label' are the break and continue labels which we need to | |
9589 | emit since the <statements> may be jumping to 'break_label' (if they | |
9590 | contain 'break') or to 'continue_label' (if they contain | |
9591 | 'continue'). | |
7fd68cee | 9592 | |
267785bc | 9593 | The syntax is |
6bbb4715 | 9594 | |
267785bc | 9595 | for (<object expression> in <collection expression>) |
9596 | <statements> | |
7fd68cee | 9597 | |
267785bc | 9598 | which is compiled into the following blurb: |
9599 | ||
9600 | { | |
9601 | id __objc_foreach_collection; | |
9602 | __objc_fast_enumeration_state __objc_foreach_enum_state; | |
9603 | unsigned long __objc_foreach_batchsize; | |
9604 | id __objc_foreach_items[16]; | |
9605 | __objc_foreach_collection = <collection expression>; | |
9606 | __objc_foreach_enum_state = { 0 }; | |
9607 | __objc_foreach_batchsize = [__objc_foreach_collection countByEnumeratingWithState: &__objc_foreach_enum_state objects: __objc_foreach_items count: 16]; | |
6bbb4715 | 9608 | |
267785bc | 9609 | if (__objc_foreach_batchsize == 0) |
9610 | <object expression> = nil; | |
9611 | else | |
9612 | { | |
9613 | unsigned long __objc_foreach_mutations_pointer = *__objc_foreach_enum_state.mutationsPtr; | |
9614 | next_batch: | |
7fd68cee | 9615 | { |
267785bc | 9616 | unsigned long __objc_foreach_index; |
9617 | __objc_foreach_index = 0; | |
7fd68cee | 9618 | |
267785bc | 9619 | next_object: |
9620 | if (__objc_foreach_mutation_pointer != *__objc_foreach_enum_state.mutationsPtr) objc_enumeration_mutation (<collection expression>); | |
9621 | <object expression> = enumState.itemsPtr[__objc_foreach_index]; | |
9622 | <statements> [PS: inside <statments>, 'break' jumps to break_label and 'continue' jumps to continue_label] | |
7fd68cee | 9623 | |
267785bc | 9624 | continue_label: |
9625 | __objc_foreach_index++; | |
9626 | if (__objc_foreach_index < __objc_foreach_batchsize) goto next_object; | |
9627 | __objc_foreach_batchsize = [__objc_foreach_collection countByEnumeratingWithState: &__objc_foreach_enum_state objects: __objc_foreach_items count: 16]; | |
9628 | } | |
9629 | if (__objc_foreach_batchsize != 0) goto next_batch; | |
9630 | <object expression> = nil; | |
9631 | break_label: | |
7fd68cee | 9632 | } |
267785bc | 9633 | } |
7fd68cee | 9634 | |
267785bc | 9635 | 'statements' may contain a 'continue' or 'break' instruction, which |
9636 | the user expects to 'continue' or 'break' the entire foreach loop. | |
9637 | We are provided the labels that 'break' and 'continue' jump to, so | |
9638 | we place them where we want them to jump to when they pick them. | |
6bbb4715 | 9639 | |
267785bc | 9640 | Optimization TODO: we could cache the IMP of |
9641 | countByEnumeratingWithState:objects:count:. | |
9642 | */ | |
7fd68cee | 9643 | |
267785bc | 9644 | /* If you need to debug objc_finish_foreach_loop(), uncomment the following line. */ |
9645 | /* #define DEBUG_OBJC_FINISH_FOREACH_LOOP 1 */ | |
7fd68cee | 9646 | |
267785bc | 9647 | #ifdef DEBUG_OBJC_FINISH_FOREACH_LOOP |
9648 | #include "tree-pretty-print.h" | |
86c110ac | 9649 | #endif |
86c110ac | 9650 | |
267785bc | 9651 | void |
6bbb4715 | 9652 | objc_finish_foreach_loop (location_t location, tree object_expression, tree collection_expression, tree for_body, |
267785bc | 9653 | tree break_label, tree continue_label) |
9d9f5bb3 | 9654 | { |
267785bc | 9655 | /* A tree representing the __objcFastEnumerationState struct type, |
9656 | or NSFastEnumerationState struct, whatever we are using. */ | |
9657 | tree objc_fast_enumeration_state_type; | |
9d9f5bb3 | 9658 | |
267785bc | 9659 | /* The trees representing the declarations of each of the local variables. */ |
9660 | tree objc_foreach_collection_decl; | |
9661 | tree objc_foreach_enum_state_decl; | |
9662 | tree objc_foreach_items_decl; | |
9663 | tree objc_foreach_batchsize_decl; | |
9664 | tree objc_foreach_mutations_pointer_decl; | |
9665 | tree objc_foreach_index_decl; | |
9d9f5bb3 | 9666 | |
267785bc | 9667 | /* A tree representing the selector countByEnumeratingWithState:objects:count:. */ |
9668 | tree selector_name; | |
9d9f5bb3 | 9669 | |
267785bc | 9670 | /* A tree representing the local bind. */ |
9671 | tree bind; | |
9d9f5bb3 | 9672 | |
267785bc | 9673 | /* A tree representing the external 'if (__objc_foreach_batchsize)' */ |
9674 | tree first_if; | |
9d9f5bb3 | 9675 | |
267785bc | 9676 | /* A tree representing the 'else' part of 'first_if' */ |
9677 | tree first_else; | |
9d9f5bb3 | 9678 | |
267785bc | 9679 | /* A tree representing the 'next_batch' label. */ |
9680 | tree next_batch_label_decl; | |
9d9f5bb3 | 9681 | |
267785bc | 9682 | /* A tree representing the binding after the 'next_batch' label. */ |
9683 | tree next_batch_bind; | |
9d9f5bb3 | 9684 | |
267785bc | 9685 | /* A tree representing the 'next_object' label. */ |
9686 | tree next_object_label_decl; | |
9d9f5bb3 | 9687 | |
267785bc | 9688 | /* Temporary variables. */ |
9689 | tree t; | |
9690 | int i; | |
9d9f5bb3 | 9691 | |
1ef143b6 | 9692 | if (flag_objc1_only) |
267785bc | 9693 | error_at (location, "fast enumeration is not available in Objective-C 1.0"); |
1ef143b6 | 9694 | |
267785bc | 9695 | if (object_expression == error_mark_node) |
e1f293c0 | 9696 | return; |
9697 | ||
267785bc | 9698 | if (collection_expression == error_mark_node) |
9699 | return; | |
9d9f5bb3 | 9700 | |
267785bc | 9701 | if (!objc_type_valid_for_messaging (TREE_TYPE (object_expression), true)) |
9d9f5bb3 | 9702 | { |
267785bc | 9703 | error_at (location, "iterating variable in fast enumeration is not an object"); |
9d9f5bb3 | 9704 | return; |
9705 | } | |
9706 | ||
267785bc | 9707 | if (!objc_type_valid_for_messaging (TREE_TYPE (collection_expression), true)) |
9d9f5bb3 | 9708 | { |
267785bc | 9709 | error_at (location, "collection in fast enumeration is not an object"); |
9d9f5bb3 | 9710 | return; |
9711 | } | |
9712 | ||
267785bc | 9713 | /* TODO: Check that object_expression is either a variable |
9714 | declaration, or an lvalue. */ | |
9d9f5bb3 | 9715 | |
267785bc | 9716 | /* This kludge is an idea from apple. We use the |
9717 | __objcFastEnumerationState struct implicitly defined by the | |
9718 | compiler, unless a NSFastEnumerationState struct has been defined | |
9719 | (by a Foundation library such as GNUstep Base) in which case, we | |
9720 | use that one. | |
9721 | */ | |
9722 | objc_fast_enumeration_state_type = objc_fast_enumeration_state_template; | |
9723 | { | |
9724 | tree objc_NSFastEnumeration_type = lookup_name (get_identifier ("NSFastEnumerationState")); | |
9d9f5bb3 | 9725 | |
267785bc | 9726 | if (objc_NSFastEnumeration_type) |
9d9f5bb3 | 9727 | { |
267785bc | 9728 | /* TODO: We really need to check that |
9729 | objc_NSFastEnumeration_type is the same as ours! */ | |
9730 | if (TREE_CODE (objc_NSFastEnumeration_type) == TYPE_DECL) | |
9731 | { | |
9732 | /* If it's a typedef, use the original type. */ | |
9733 | if (DECL_ORIGINAL_TYPE (objc_NSFastEnumeration_type)) | |
9734 | objc_fast_enumeration_state_type = DECL_ORIGINAL_TYPE (objc_NSFastEnumeration_type); | |
9735 | else | |
6bbb4715 | 9736 | objc_fast_enumeration_state_type = TREE_TYPE (objc_NSFastEnumeration_type); |
267785bc | 9737 | } |
9d9f5bb3 | 9738 | } |
267785bc | 9739 | } |
9d9f5bb3 | 9740 | |
267785bc | 9741 | /* { */ |
9742 | /* Done by c-parser.c. */ | |
9d9f5bb3 | 9743 | |
267785bc | 9744 | /* type object; */ |
9745 | /* Done by c-parser.c. */ | |
e1f293c0 | 9746 | |
267785bc | 9747 | /* Disable warnings that 'object' is unused. For example the code |
9d9f5bb3 | 9748 | |
267785bc | 9749 | for (id object in collection) |
9750 | i++; | |
e1f293c0 | 9751 | |
267785bc | 9752 | which can be used to count how many objects there are in the |
9753 | collection is fine and should generate no warnings even if | |
9754 | 'object' is technically unused. */ | |
9755 | TREE_USED (object_expression) = 1; | |
9756 | if (DECL_P (object_expression)) | |
9757 | DECL_READ_P (object_expression) = 1; | |
9d9f5bb3 | 9758 | |
267785bc | 9759 | /* id __objc_foreach_collection */ |
9760 | objc_foreach_collection_decl = objc_create_temporary_var (objc_object_type, "__objc_foreach_collection"); | |
1ef143b6 | 9761 | |
267785bc | 9762 | /* __objcFastEnumerationState __objc_foreach_enum_state; */ |
9763 | objc_foreach_enum_state_decl = objc_create_temporary_var (objc_fast_enumeration_state_type, "__objc_foreach_enum_state"); | |
9764 | TREE_CHAIN (objc_foreach_enum_state_decl) = objc_foreach_collection_decl; | |
e1f293c0 | 9765 | |
267785bc | 9766 | /* id __objc_foreach_items[16]; */ |
9767 | objc_foreach_items_decl = objc_create_temporary_var (build_sized_array_type (objc_object_type, 16), "__objc_foreach_items"); | |
9768 | TREE_CHAIN (objc_foreach_items_decl) = objc_foreach_enum_state_decl; | |
e1f293c0 | 9769 | |
267785bc | 9770 | /* unsigned long __objc_foreach_batchsize; */ |
9771 | objc_foreach_batchsize_decl = objc_create_temporary_var (long_unsigned_type_node, "__objc_foreach_batchsize"); | |
9772 | TREE_CHAIN (objc_foreach_batchsize_decl) = objc_foreach_items_decl; | |
f26877d5 | 9773 | |
267785bc | 9774 | /* Generate the local variable binding. */ |
9775 | bind = build3 (BIND_EXPR, void_type_node, objc_foreach_batchsize_decl, NULL, NULL); | |
9776 | SET_EXPR_LOCATION (bind, location); | |
9777 | TREE_SIDE_EFFECTS (bind) = 1; | |
6bbb4715 | 9778 | |
267785bc | 9779 | /* __objc_foreach_collection = <collection expression>; */ |
9780 | t = build2 (MODIFY_EXPR, void_type_node, objc_foreach_collection_decl, collection_expression); | |
9781 | SET_EXPR_LOCATION (t, location); | |
9782 | append_to_statement_list (t, &BIND_EXPR_BODY (bind)); | |
9783 | /* We have used 'collection_expression'. */ | |
9784 | mark_exp_read (collection_expression); | |
9d9f5bb3 | 9785 | |
267785bc | 9786 | /* __objc_foreach_enum_state.state = 0; */ |
6bbb4715 | 9787 | t = build2 (MODIFY_EXPR, void_type_node, objc_build_component_ref (objc_foreach_enum_state_decl, |
267785bc | 9788 | get_identifier ("state")), |
9789 | build_int_cst (long_unsigned_type_node, 0)); | |
9790 | SET_EXPR_LOCATION (t, location); | |
9791 | append_to_statement_list (t, &BIND_EXPR_BODY (bind)); | |
9792 | ||
9793 | /* __objc_foreach_enum_state.itemsPtr = NULL; */ | |
6bbb4715 | 9794 | t = build2 (MODIFY_EXPR, void_type_node, objc_build_component_ref (objc_foreach_enum_state_decl, |
267785bc | 9795 | get_identifier ("itemsPtr")), |
9796 | null_pointer_node); | |
9797 | SET_EXPR_LOCATION (t, location); | |
9798 | append_to_statement_list (t, &BIND_EXPR_BODY (bind)); | |
9799 | ||
9800 | /* __objc_foreach_enum_state.mutationsPtr = NULL; */ | |
6bbb4715 | 9801 | t = build2 (MODIFY_EXPR, void_type_node, objc_build_component_ref (objc_foreach_enum_state_decl, |
267785bc | 9802 | get_identifier ("mutationsPtr")), |
9803 | null_pointer_node); | |
9804 | SET_EXPR_LOCATION (t, location); | |
9805 | append_to_statement_list (t, &BIND_EXPR_BODY (bind)); | |
9806 | ||
9807 | /* __objc_foreach_enum_state.extra[0] = 0; */ | |
9808 | /* __objc_foreach_enum_state.extra[1] = 0; */ | |
9809 | /* __objc_foreach_enum_state.extra[2] = 0; */ | |
9810 | /* __objc_foreach_enum_state.extra[3] = 0; */ | |
9811 | /* __objc_foreach_enum_state.extra[4] = 0; */ | |
9812 | for (i = 0; i < 5 ; i++) | |
9d9f5bb3 | 9813 | { |
267785bc | 9814 | t = build2 (MODIFY_EXPR, void_type_node, |
6bbb4715 | 9815 | build_array_ref (location, objc_build_component_ref (objc_foreach_enum_state_decl, |
267785bc | 9816 | get_identifier ("extra")), |
9817 | build_int_cst (NULL_TREE, i)), | |
9818 | build_int_cst (long_unsigned_type_node, 0)); | |
9819 | SET_EXPR_LOCATION (t, location); | |
9820 | append_to_statement_list (t, &BIND_EXPR_BODY (bind)); | |
9d9f5bb3 | 9821 | } |
6bbb4715 | 9822 | |
267785bc | 9823 | /* __objc_foreach_batchsize = [__objc_foreach_collection countByEnumeratingWithState: &__objc_foreach_enum_state objects: __objc_foreach_items count: 16]; */ |
9824 | selector_name = get_identifier ("countByEnumeratingWithState:objects:count:"); | |
9825 | #ifdef OBJCPLUS | |
9826 | t = objc_finish_message_expr (objc_foreach_collection_decl, selector_name, | |
9827 | /* Parameters. */ | |
9828 | tree_cons /* &__objc_foreach_enum_state */ | |
9829 | (NULL_TREE, build_fold_addr_expr_loc (location, objc_foreach_enum_state_decl), | |
9830 | tree_cons /* __objc_foreach_items */ | |
9831 | (NULL_TREE, objc_foreach_items_decl, | |
9832 | tree_cons /* 16 */ | |
9833 | (NULL_TREE, build_int_cst (NULL_TREE, 16), NULL_TREE))), NULL); | |
9834 | #else | |
9835 | /* In C, we need to decay the __objc_foreach_items array that we are passing. */ | |
9836 | { | |
9837 | struct c_expr array; | |
9838 | array.value = objc_foreach_items_decl; | |
9839 | t = objc_finish_message_expr (objc_foreach_collection_decl, selector_name, | |
9840 | /* Parameters. */ | |
9841 | tree_cons /* &__objc_foreach_enum_state */ | |
9842 | (NULL_TREE, build_fold_addr_expr_loc (location, objc_foreach_enum_state_decl), | |
9843 | tree_cons /* __objc_foreach_items */ | |
9844 | (NULL_TREE, default_function_array_conversion (location, array).value, | |
9845 | tree_cons /* 16 */ | |
9846 | (NULL_TREE, build_int_cst (NULL_TREE, 16), NULL_TREE))), NULL); | |
9847 | } | |
9848 | #endif | |
9849 | t = build2 (MODIFY_EXPR, void_type_node, objc_foreach_batchsize_decl, | |
9850 | convert (long_unsigned_type_node, t)); | |
9851 | SET_EXPR_LOCATION (t, location); | |
9852 | append_to_statement_list (t, &BIND_EXPR_BODY (bind)); | |
e1f293c0 | 9853 | |
267785bc | 9854 | /* if (__objc_foreach_batchsize == 0) */ |
6bbb4715 | 9855 | first_if = build3 (COND_EXPR, void_type_node, |
267785bc | 9856 | /* Condition. */ |
6bbb4715 | 9857 | c_fully_fold |
9858 | (c_common_truthvalue_conversion | |
9859 | (location, | |
267785bc | 9860 | build_binary_op (location, |
6bbb4715 | 9861 | EQ_EXPR, |
267785bc | 9862 | objc_foreach_batchsize_decl, |
9863 | build_int_cst (long_unsigned_type_node, 0), 1)), | |
9864 | false, NULL), | |
9865 | /* Then block (we fill it in later). */ | |
9866 | NULL_TREE, | |
9867 | /* Else block (we fill it in later). */ | |
9868 | NULL_TREE); | |
9869 | SET_EXPR_LOCATION (first_if, location); | |
9870 | append_to_statement_list (first_if, &BIND_EXPR_BODY (bind)); | |
86c110ac | 9871 | |
267785bc | 9872 | /* then <object expression> = nil; */ |
9873 | t = build2 (MODIFY_EXPR, void_type_node, object_expression, convert (objc_object_type, null_pointer_node)); | |
9874 | SET_EXPR_LOCATION (t, location); | |
9875 | COND_EXPR_THEN (first_if) = t; | |
86c110ac | 9876 | |
267785bc | 9877 | /* Now we build the 'else' part of the if; once we finish building |
9878 | it, we attach it to first_if as the 'else' part. */ | |
9d9f5bb3 | 9879 | |
267785bc | 9880 | /* else */ |
9881 | /* { */ | |
9d9f5bb3 | 9882 | |
267785bc | 9883 | /* unsigned long __objc_foreach_mutations_pointer; */ |
9884 | objc_foreach_mutations_pointer_decl = objc_create_temporary_var (long_unsigned_type_node, "__objc_foreach_mutations_pointer"); | |
86c110ac | 9885 | |
267785bc | 9886 | /* Generate the local variable binding. */ |
9887 | first_else = build3 (BIND_EXPR, void_type_node, objc_foreach_mutations_pointer_decl, NULL, NULL); | |
9888 | SET_EXPR_LOCATION (first_else, location); | |
9889 | TREE_SIDE_EFFECTS (first_else) = 1; | |
c450c529 | 9890 | |
267785bc | 9891 | /* __objc_foreach_mutations_pointer = *__objc_foreach_enum_state.mutationsPtr; */ |
6bbb4715 | 9892 | t = build2 (MODIFY_EXPR, void_type_node, objc_foreach_mutations_pointer_decl, |
9893 | build_indirect_ref (location, objc_build_component_ref (objc_foreach_enum_state_decl, | |
267785bc | 9894 | get_identifier ("mutationsPtr")), |
9895 | RO_UNARY_STAR)); | |
9896 | SET_EXPR_LOCATION (t, location); | |
9897 | append_to_statement_list (t, &BIND_EXPR_BODY (first_else)); | |
86c110ac | 9898 | |
267785bc | 9899 | /* next_batch: */ |
9900 | next_batch_label_decl = create_artificial_label (location); | |
6bbb4715 | 9901 | t = build1 (LABEL_EXPR, void_type_node, next_batch_label_decl); |
267785bc | 9902 | SET_EXPR_LOCATION (t, location); |
9903 | append_to_statement_list (t, &BIND_EXPR_BODY (first_else)); | |
6bbb4715 | 9904 | |
267785bc | 9905 | /* { */ |
29d8eac9 | 9906 | |
267785bc | 9907 | /* unsigned long __objc_foreach_index; */ |
9908 | objc_foreach_index_decl = objc_create_temporary_var (long_unsigned_type_node, "__objc_foreach_index"); | |
7f5203a8 | 9909 | |
267785bc | 9910 | /* Generate the local variable binding. */ |
9911 | next_batch_bind = build3 (BIND_EXPR, void_type_node, objc_foreach_index_decl, NULL, NULL); | |
9912 | SET_EXPR_LOCATION (next_batch_bind, location); | |
9913 | TREE_SIDE_EFFECTS (next_batch_bind) = 1; | |
9914 | append_to_statement_list (next_batch_bind, &BIND_EXPR_BODY (first_else)); | |
0a65c3bb | 9915 | |
267785bc | 9916 | /* __objc_foreach_index = 0; */ |
9917 | t = build2 (MODIFY_EXPR, void_type_node, objc_foreach_index_decl, | |
9918 | build_int_cst (long_unsigned_type_node, 0)); | |
9919 | SET_EXPR_LOCATION (t, location); | |
9920 | append_to_statement_list (t, &BIND_EXPR_BODY (next_batch_bind)); | |
0a65c3bb | 9921 | |
267785bc | 9922 | /* next_object: */ |
9923 | next_object_label_decl = create_artificial_label (location); | |
9924 | t = build1 (LABEL_EXPR, void_type_node, next_object_label_decl); | |
9925 | SET_EXPR_LOCATION (t, location); | |
9926 | append_to_statement_list (t, &BIND_EXPR_BODY (next_batch_bind)); | |
0a65c3bb | 9927 | |
267785bc | 9928 | /* if (__objc_foreach_mutation_pointer != *__objc_foreach_enum_state.mutationsPtr) objc_enumeration_mutation (<collection expression>); */ |
6bbb4715 | 9929 | t = build3 (COND_EXPR, void_type_node, |
267785bc | 9930 | /* Condition. */ |
6bbb4715 | 9931 | c_fully_fold |
9932 | (c_common_truthvalue_conversion | |
9933 | (location, | |
9934 | build_binary_op | |
267785bc | 9935 | (location, |
6bbb4715 | 9936 | NE_EXPR, |
267785bc | 9937 | objc_foreach_mutations_pointer_decl, |
6bbb4715 | 9938 | build_indirect_ref (location, |
9939 | objc_build_component_ref (objc_foreach_enum_state_decl, | |
267785bc | 9940 | get_identifier ("mutationsPtr")), |
9941 | RO_UNARY_STAR), 1)), | |
9942 | false, NULL), | |
9943 | /* Then block. */ | |
9944 | build_function_call (input_location, | |
9945 | objc_enumeration_mutation_decl, | |
9946 | tree_cons (NULL, collection_expression, NULL)), | |
9947 | /* Else block. */ | |
9948 | NULL_TREE); | |
9949 | SET_EXPR_LOCATION (t, location); | |
9950 | append_to_statement_list (t, &BIND_EXPR_BODY (next_batch_bind)); | |
0a65c3bb | 9951 | |
267785bc | 9952 | /* <object expression> = enumState.itemsPtr[__objc_foreach_index]; */ |
6bbb4715 | 9953 | t = build2 (MODIFY_EXPR, void_type_node, object_expression, |
9954 | build_array_ref (location, objc_build_component_ref (objc_foreach_enum_state_decl, | |
267785bc | 9955 | get_identifier ("itemsPtr")), |
9956 | objc_foreach_index_decl)); | |
9957 | SET_EXPR_LOCATION (t, location); | |
9958 | append_to_statement_list (t, &BIND_EXPR_BODY (next_batch_bind)); | |
0a65c3bb | 9959 | |
267785bc | 9960 | /* <statements> [PS: in <statments>, 'break' jumps to break_label and 'continue' jumps to continue_label] */ |
9961 | append_to_statement_list (for_body, &BIND_EXPR_BODY (next_batch_bind)); | |
0a65c3bb | 9962 | |
267785bc | 9963 | /* continue_label: */ |
9964 | if (continue_label) | |
9965 | { | |
9966 | t = build1 (LABEL_EXPR, void_type_node, continue_label); | |
9967 | SET_EXPR_LOCATION (t, location); | |
9968 | append_to_statement_list (t, &BIND_EXPR_BODY (next_batch_bind)); | |
9969 | } | |
0a65c3bb | 9970 | |
267785bc | 9971 | /* __objc_foreach_index++; */ |
6bbb4715 | 9972 | t = build2 (MODIFY_EXPR, void_type_node, objc_foreach_index_decl, |
267785bc | 9973 | build_binary_op (location, |
9974 | PLUS_EXPR, | |
9975 | objc_foreach_index_decl, | |
9976 | build_int_cst (long_unsigned_type_node, 1), 1)); | |
9977 | SET_EXPR_LOCATION (t, location); | |
9978 | append_to_statement_list (t, &BIND_EXPR_BODY (next_batch_bind)); | |
0a65c3bb | 9979 | |
267785bc | 9980 | /* if (__objc_foreach_index < __objc_foreach_batchsize) goto next_object; */ |
6bbb4715 | 9981 | t = build3 (COND_EXPR, void_type_node, |
267785bc | 9982 | /* Condition. */ |
6bbb4715 | 9983 | c_fully_fold |
9984 | (c_common_truthvalue_conversion | |
9985 | (location, | |
267785bc | 9986 | build_binary_op (location, |
6bbb4715 | 9987 | LT_EXPR, |
267785bc | 9988 | objc_foreach_index_decl, |
9989 | objc_foreach_batchsize_decl, 1)), | |
9990 | false, NULL), | |
9991 | /* Then block. */ | |
9992 | build1 (GOTO_EXPR, void_type_node, next_object_label_decl), | |
9993 | /* Else block. */ | |
9994 | NULL_TREE); | |
9995 | SET_EXPR_LOCATION (t, location); | |
9996 | append_to_statement_list (t, &BIND_EXPR_BODY (next_batch_bind)); | |
6bbb4715 | 9997 | |
267785bc | 9998 | /* __objc_foreach_batchsize = [__objc_foreach_collection countByEnumeratingWithState: &__objc_foreach_enum_state objects: __objc_foreach_items count: 16]; */ |
9999 | #ifdef OBJCPLUS | |
10000 | t = objc_finish_message_expr (objc_foreach_collection_decl, selector_name, | |
10001 | /* Parameters. */ | |
10002 | tree_cons /* &__objc_foreach_enum_state */ | |
10003 | (NULL_TREE, build_fold_addr_expr_loc (location, objc_foreach_enum_state_decl), | |
10004 | tree_cons /* __objc_foreach_items */ | |
10005 | (NULL_TREE, objc_foreach_items_decl, | |
10006 | tree_cons /* 16 */ | |
10007 | (NULL_TREE, build_int_cst (NULL_TREE, 16), NULL_TREE))), NULL); | |
10008 | #else | |
10009 | /* In C, we need to decay the __objc_foreach_items array that we are passing. */ | |
0a65c3bb | 10010 | { |
267785bc | 10011 | struct c_expr array; |
10012 | array.value = objc_foreach_items_decl; | |
10013 | t = objc_finish_message_expr (objc_foreach_collection_decl, selector_name, | |
10014 | /* Parameters. */ | |
10015 | tree_cons /* &__objc_foreach_enum_state */ | |
10016 | (NULL_TREE, build_fold_addr_expr_loc (location, objc_foreach_enum_state_decl), | |
10017 | tree_cons /* __objc_foreach_items */ | |
10018 | (NULL_TREE, default_function_array_conversion (location, array).value, | |
10019 | tree_cons /* 16 */ | |
10020 | (NULL_TREE, build_int_cst (NULL_TREE, 16), NULL_TREE))), NULL); | |
10021 | } | |
10022 | #endif | |
6bbb4715 | 10023 | t = build2 (MODIFY_EXPR, void_type_node, objc_foreach_batchsize_decl, |
267785bc | 10024 | convert (long_unsigned_type_node, t)); |
10025 | SET_EXPR_LOCATION (t, location); | |
10026 | append_to_statement_list (t, &BIND_EXPR_BODY (next_batch_bind)); | |
0a65c3bb | 10027 | |
267785bc | 10028 | /* } */ |
0a65c3bb | 10029 | |
267785bc | 10030 | /* if (__objc_foreach_batchsize != 0) goto next_batch; */ |
6bbb4715 | 10031 | t = build3 (COND_EXPR, void_type_node, |
267785bc | 10032 | /* Condition. */ |
6bbb4715 | 10033 | c_fully_fold |
10034 | (c_common_truthvalue_conversion | |
10035 | (location, | |
267785bc | 10036 | build_binary_op (location, |
6bbb4715 | 10037 | NE_EXPR, |
267785bc | 10038 | objc_foreach_batchsize_decl, |
10039 | build_int_cst (long_unsigned_type_node, 0), 1)), | |
10040 | false, NULL), | |
10041 | /* Then block. */ | |
10042 | build1 (GOTO_EXPR, void_type_node, next_batch_label_decl), | |
10043 | /* Else block. */ | |
10044 | NULL_TREE); | |
10045 | SET_EXPR_LOCATION (t, location); | |
10046 | append_to_statement_list (t, &BIND_EXPR_BODY (first_else)); | |
0a65c3bb | 10047 | |
267785bc | 10048 | /* <object expression> = nil; */ |
10049 | t = build2 (MODIFY_EXPR, void_type_node, object_expression, convert (objc_object_type, null_pointer_node)); | |
10050 | SET_EXPR_LOCATION (t, location); | |
10051 | append_to_statement_list (t, &BIND_EXPR_BODY (first_else)); | |
10052 | ||
10053 | /* break_label: */ | |
10054 | if (break_label) | |
10055 | { | |
10056 | t = build1 (LABEL_EXPR, void_type_node, break_label); | |
10057 | SET_EXPR_LOCATION (t, location); | |
10058 | append_to_statement_list (t, &BIND_EXPR_BODY (first_else)); | |
10059 | } | |
0a65c3bb | 10060 | |
267785bc | 10061 | /* } */ |
10062 | COND_EXPR_ELSE (first_if) = first_else; | |
10063 | ||
10064 | /* Do the whole thing. */ | |
10065 | add_stmt (bind); | |
0a65c3bb | 10066 | |
10067 | #ifdef DEBUG_OBJC_FINISH_FOREACH_LOOP | |
267785bc | 10068 | /* This will print to stderr the whole blurb generated by the |
10069 | compiler while compiling (assuming the compiler doesn't crash | |
10070 | before getting here). | |
10071 | */ | |
10072 | debug_generic_stmt (bind); | |
0a65c3bb | 10073 | #endif |
10074 | ||
267785bc | 10075 | /* } */ |
10076 | /* Done by c-parser.c */ | |
10077 | } | |
10078 | ||
10079 | /* --- SUPPORT FOR FORMAT ARG CHECKING --- */ | |
10080 | /* Return true if we have an NxString object pointer. */ | |
10081 | ||
10082 | bool | |
10083 | objc_string_ref_type_p (tree strp) | |
10084 | { | |
10085 | tree tmv; | |
10086 | if (!strp || TREE_CODE (strp) != POINTER_TYPE) | |
10087 | return false; | |
10088 | ||
10089 | tmv = TYPE_MAIN_VARIANT (TREE_TYPE (strp)); | |
10090 | tmv = OBJC_TYPE_NAME (tmv); | |
10091 | return (tmv | |
6bbb4715 | 10092 | && TREE_CODE (tmv) == IDENTIFIER_NODE |
10093 | && IDENTIFIER_POINTER (tmv) | |
267785bc | 10094 | && !strncmp (IDENTIFIER_POINTER (tmv), "NSString", 8)); |
10095 | } | |
10096 | ||
10097 | /* At present the behavior of this is undefined and it does nothing. */ | |
0a65c3bb | 10098 | void |
6bbb4715 | 10099 | objc_check_format_arg (tree ARG_UNUSED (format_arg), |
267785bc | 10100 | tree ARG_UNUSED (args_list)) |
0a65c3bb | 10101 | { |
267785bc | 10102 | } |
0a65c3bb | 10103 | |
9b88d08d | 10104 | void |
10105 | objc_common_init_ts (void) | |
10106 | { | |
10107 | c_common_init_ts (); | |
10108 | ||
10109 | MARK_TS_DECL_NON_COMMON (CLASS_METHOD_DECL); | |
10110 | MARK_TS_DECL_NON_COMMON (INSTANCE_METHOD_DECL); | |
10111 | MARK_TS_DECL_NON_COMMON (KEYWORD_DECL); | |
10112 | MARK_TS_DECL_NON_COMMON (PROPERTY_DECL); | |
10113 | ||
10114 | MARK_TS_COMMON (CLASS_INTERFACE_TYPE); | |
10115 | MARK_TS_COMMON (PROTOCOL_INTERFACE_TYPE); | |
10116 | MARK_TS_COMMON (CLASS_IMPLEMENTATION_TYPE); | |
10117 | ||
10118 | MARK_TS_TYPED (MESSAGE_SEND_EXPR); | |
10119 | MARK_TS_TYPED (PROPERTY_REF); | |
10120 | } | |
10121 | ||
83c7dcd8 | 10122 | size_t |
10123 | objc_common_tree_size (enum tree_code code) | |
10124 | { | |
10125 | switch (code) | |
10126 | { | |
10127 | case CLASS_METHOD_DECL: | |
10128 | case INSTANCE_METHOD_DECL: | |
10129 | case KEYWORD_DECL: | |
10130 | case PROPERTY_DECL: | |
10131 | return sizeof (struct tree_decl_non_common); | |
10132 | default: | |
10133 | gcc_unreachable (); | |
10134 | ||
10135 | } | |
10136 | } | |
10137 | ||
10138 | ||
6090deb8 | 10139 | #include "gt-objc-objc-act.h" |