| blob | fe0d51709ebd66c08aeb51cada16b9ac79dbdb95 |
1 /* YACC parser for C syntax and for Objective C. -*-c-*-
2 Copyright (C) 1987, 1988, 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
3 1999, 2000, 2001, 2002, 2003, 2004, 2005 Free Software Foundation, Inc.
5 This file is part of GCC.
7 GCC is free software; you can redistribute it and/or modify it under
8 the terms of the GNU General Public License as published by the Free
9 Software Foundation; either version 2, or (at your option) any later
10 version.
12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
15 for more details.
17 You should have received a copy of the GNU General Public License
18 along with GCC; see the file COPYING. If not, write to the Free
19 Software Foundation, 59 Temple Place - Suite 330, Boston, MA
20 02111-1307, USA. */
22 /* This file defines the grammar of C and that of Objective C.
23 @@ifobjc ... @@end_ifobjc conditionals contain code for Objective C only.
24 @@ifc ... @@end_ifc conditionals contain code for C only.
25 Sed commands in Makefile.in are used to convert this file into
26 c-parse.y and into objc-parse.y. */
28 /* To whomever it may concern: I have heard that such a thing was once
29 written by AT&T, but I have never seen it. */
31 @@ifc
32 %expect 13 /* shift/reduce conflicts, and no reduce/reduce conflicts. */
33 @@end_ifc
35 %{
36 #include "config.h"
37 #include "system.h"
38 #include "coretypes.h"
39 #include "tm.h"
40 #include "tree.h"
41 #include "langhooks.h"
42 #include "input.h"
43 #include "cpplib.h"
44 #include "intl.h"
45 #include "timevar.h"
46 #include "c-pragma.h" /* For YYDEBUG definition, and parse_in. */
47 #include "c-tree.h"
48 #include "flags.h"
49 #include "varray.h"
50 #include "output.h"
51 #include "toplev.h"
52 #include "ggc.h"
53 #include "c-common.h"
55 #define YYERROR1 { yyerror ("syntax error"); YYERROR; }
57 /* Like the default stack expander, except (1) use realloc when possible,
58 (2) impose no hard maxiumum on stack size, (3) REALLY do not use alloca.
60 Irritatingly, YYSTYPE is defined after this %{ %} block, so we cannot
61 give malloced_yyvs its proper type. This is ok since all we need from
62 it is to be able to free it. */
64 static short *malloced_yyss;
65 static void *malloced_yyvs;
67 #define yyoverflow(MSG, SS, SSSIZE, VS, VSSIZE, YYSSZ) \
68 do { \
69 size_t newsize; \
70 short *newss; \
71 YYSTYPE *newvs; \
72 newsize = *(YYSSZ) *= 2; \
73 if (malloced_yyss) \
74 { \
75 newss = really_call_realloc (*(SS), newsize * sizeof (short)); \
76 newvs = really_call_realloc (*(VS), newsize * sizeof (YYSTYPE)); \
77 } \
78 else \
79 { \
80 newss = really_call_malloc (newsize * sizeof (short)); \
81 newvs = really_call_malloc (newsize * sizeof (YYSTYPE)); \
82 if (newss) \
83 memcpy (newss, *(SS), (SSSIZE)); \
84 if (newvs) \
85 memcpy (newvs, *(VS), (VSSIZE)); \
86 } \
87 if (!newss || !newvs) \
88 { \
89 yyerror (MSG); \
90 return 2; \
91 } \
92 *(SS) = newss; \
93 *(VS) = newvs; \
94 malloced_yyss = newss; \
95 malloced_yyvs = (void *) newvs; \
96 } while (0)
97 %}
99 %start program
101 %union {long itype; tree ttype; void *otype; struct c_expr exprtype;
102 struct c_arg_info *arginfotype; struct c_declarator *dtrtype;
103 struct c_type_name *typenametype; struct c_parm *parmtype;
104 struct c_declspecs *dsptype; struct c_typespec tstype;
105 enum tree_code code; location_t location; }
107 /* All identifiers that are not reserved words
108 and are not declared typedefs in the current block */
109 %token IDENTIFIER
111 /* All identifiers that are declared typedefs in the current block.
112 In some contexts, they are treated just like IDENTIFIER,
113 but they can also serve as typespecs in declarations. */
114 %token TYPENAME
116 /* Reserved words that specify storage class.
117 yylval contains an IDENTIFIER_NODE which indicates which one. */
118 %token SCSPEC /* Storage class other than static. */
119 %token STATIC /* Static storage class. */
121 /* Reserved words that specify type.
122 yylval contains an IDENTIFIER_NODE which indicates which one. */
123 %token TYPESPEC
125 /* Reserved words that qualify type: "const", "volatile", or "restrict".
126 yylval contains an IDENTIFIER_NODE which indicates which one. */
127 %token TYPE_QUAL
129 /* Objective-C protocol qualifiers. These acquire their magic powers
130 only in certain contexts. */
131 %token OBJC_TYPE_QUAL
133 /* Character or numeric constants.
134 yylval is the node for the constant. */
135 %token CONSTANT
137 /* String constants in raw form.
138 yylval is a STRING_CST node. */
140 %token STRING
142 /* "...", used for functions with variable arglists. */
143 %token ELLIPSIS
145 /* the reserved words */
146 /* SCO include files test "ASM", so use something else. */
147 %token SIZEOF ENUM STRUCT UNION IF ELSE WHILE DO FOR SWITCH CASE DEFAULT
148 %token BREAK CONTINUE RETURN GOTO ASM_KEYWORD TYPEOF ALIGNOF
149 %token ATTRIBUTE EXTENSION LABEL
150 %token REALPART IMAGPART VA_ARG CHOOSE_EXPR TYPES_COMPATIBLE_P
151 %token FUNC_NAME OFFSETOF
153 /* Add precedence rules to solve dangling else s/r conflict */
154 %nonassoc IF
155 %nonassoc ELSE
157 /* Define the operator tokens and their precedences.
158 The value is an integer because, if used, it is the tree code
159 to use in the expression made from the operator. */
161 %right <code> ASSIGN '='
162 %right <code> '?' ':'
163 %left <code> OROR
164 %left <code> ANDAND
165 %left <code> '|'
166 %left <code> '^'
167 %left <code> '&'
168 %left <code> EQCOMPARE
169 %left <code> ARITHCOMPARE
170 %left <code> LSHIFT RSHIFT
171 %left <code> '+' '-'
172 %left <code> '*' '/' '%'
173 %right <code> UNARY PLUSPLUS MINUSMINUS
174 %left HYPERUNARY
175 %left <code> POINTSAT '.' '(' '['
177 /* The Objective-C keywords. These are included in C and in
178 Objective C, so that the token codes are the same in both. */
179 %token AT_INTERFACE AT_IMPLEMENTATION AT_END AT_SELECTOR AT_DEFS AT_ENCODE
180 %token CLASSNAME AT_PUBLIC AT_PRIVATE AT_PROTECTED AT_PROTOCOL
181 %token AT_CLASS AT_ALIAS
182 %token AT_THROW AT_TRY AT_CATCH AT_FINALLY AT_SYNCHRONIZED
183 %token OBJC_STRING
185 %type <code> unop
186 %type <ttype> ENUM STRUCT UNION IF ELSE WHILE DO FOR SWITCH CASE DEFAULT
187 %type <ttype> BREAK CONTINUE RETURN GOTO ASM_KEYWORD SIZEOF TYPEOF ALIGNOF
189 %type <ttype> identifier IDENTIFIER TYPENAME CONSTANT STRING FUNC_NAME
190 %type <ttype> nonnull_exprlist exprlist
191 %type <exprtype> expr expr_no_commas cast_expr unary_expr primary
192 %type <dsptype> declspecs_nosc_nots_nosa_noea declspecs_nosc_nots_nosa_ea
193 %type <dsptype> declspecs_nosc_nots_sa_noea declspecs_nosc_nots_sa_ea
194 %type <dsptype> declspecs_nosc_ts_nosa_noea declspecs_nosc_ts_nosa_ea
195 %type <dsptype> declspecs_nosc_ts_sa_noea declspecs_nosc_ts_sa_ea
196 %type <dsptype> declspecs_sc_nots_nosa_noea declspecs_sc_nots_nosa_ea
197 %type <dsptype> declspecs_sc_nots_sa_noea declspecs_sc_nots_sa_ea
198 %type <dsptype> declspecs_sc_ts_nosa_noea declspecs_sc_ts_nosa_ea
199 %type <dsptype> declspecs_sc_ts_sa_noea declspecs_sc_ts_sa_ea
200 %type <dsptype> declspecs_ts declspecs_nots
201 %type <dsptype> declspecs_ts_nosa declspecs_nots_nosa
202 %type <dsptype> declspecs_nosc_ts declspecs_nosc_nots declspecs_nosc declspecs
203 %type <dsptype> maybe_type_quals_attrs
204 %type <tstype> typespec_nonattr typespec_attr
205 %type <tstype> typespec_reserved_nonattr typespec_reserved_attr
206 %type <tstype> typespec_nonreserved_nonattr
207 %type <ttype> offsetof_member_designator
209 %type <ttype> scspec SCSPEC STATIC TYPESPEC TYPE_QUAL maybe_volatile
210 %type <ttype> initdecls notype_initdecls initdcl notype_initdcl
211 %type <exprtype> init
212 %type <ttype> simple_asm_expr maybeasm asm_stmt asm_argument asm_string
213 %type <ttype> asm_operands nonnull_asm_operands asm_operand asm_clobbers
214 %type <ttype> maybe_attribute attributes attribute attribute_list attrib
215 %type <ttype> any_word
217 %type <ttype> compstmt compstmt_start compstmt_primary_start
218 %type <ttype> stmt label stmt_nocomp start_break start_continue
220 %type <ttype> c99_block_start c99_block_lineno_labeled_stmt
221 %type <ttype> if_statement_1 if_statement_2
222 %type <dtrtype> declarator
223 %type <dtrtype> notype_declarator after_type_declarator
224 %type <dtrtype> parm_declarator
225 %type <dtrtype> parm_declarator_starttypename parm_declarator_nostarttypename
226 %type <dtrtype> array_declarator
228 %type <tstype> structsp_attr structsp_nonattr
229 %type <ttype> component_decl_list component_decl_list2
230 %type <ttype> component_decl components components_notype component_declarator
231 %type <ttype> component_notype_declarator
232 %type <ttype> enumlist enumerator
233 %type <ttype> struct_head union_head enum_head
234 %type <typenametype> typename
235 %type <dtrtype> absdcl absdcl1 absdcl1_ea absdcl1_noea direct_absdcl1
236 %type <parmtype> absdcl_maybe_attribute
237 %type <ttype> condition xexpr for_cond_expr for_incr_expr
238 %type <parmtype> parm firstparm
239 %type <ttype> identifiers
241 %type <arginfotype> parms parmlist parmlist_1 parmlist_2
242 %type <arginfotype> parmlist_or_identifiers parmlist_or_identifiers_1
243 %type <ttype> identifiers_or_typenames
245 %type <itype> setspecs setspecs_fp extension
247 %type <location> save_location
249 %type <otype> save_obstack_position
250 \f
251 @@ifobjc
252 /* the Objective-C nonterminals */
254 %type <ttype> methoddecl unaryselector keywordselector selector
255 %type <code> methodtype
256 %type <ttype> keyworddecl receiver objcmessageexpr messageargs
257 %type <ttype> keywordexpr keywordarglist keywordarg
258 %type <ttype> optparmlist optparms reservedwords objcselectorexpr
259 %type <ttype> selectorarg keywordnamelist keywordname objcencodeexpr
260 %type <ttype> non_empty_protocolrefs protocolrefs identifier_list objcprotocolexpr
262 %type <ttype> CLASSNAME OBJC_STRING OBJC_TYPE_QUAL
264 %type <ttype> superclass objc_quals objc_qual objc_typename
265 %type <itype> objc_try_catch_stmt optellipsis
266 @@end_ifobjc
267 \f
268 %{
269 /* Declaration specifiers of the current declaration. */
270 static struct c_declspecs *current_declspecs;
271 static GTY(()) tree prefix_attributes;
273 /* List of all the attributes applying to the identifier currently being
274 declared; includes prefix_attributes and possibly some more attributes
275 just after a comma. */
276 static GTY(()) tree all_prefix_attributes;
278 /* Structure to save declaration specifiers. */
279 struct c_declspec_stack {
280 /* Saved value of current_declspecs. */
281 struct c_declspecs *current_declspecs;
282 /* Saved value of prefix_attributes. */
283 tree prefix_attributes;
284 /* Saved value of all_prefix_attributes. */
285 tree all_prefix_attributes;
286 /* Next level of stack. */
287 struct c_declspec_stack *next;
288 };
290 /* Stack of saved values of current_declspecs, prefix_attributes and
291 all_prefix_attributes. */
292 static struct c_declspec_stack *declspec_stack;
294 /* INDIRECT_REF with a TREE_TYPE of the type being queried for offsetof. */
295 static tree offsetof_base;
297 /* PUSH_DECLSPEC_STACK is called from setspecs; POP_DECLSPEC_STACK
298 should be called from the productions making use of setspecs. */
299 #define PUSH_DECLSPEC_STACK \
300 do { \
301 struct c_declspec_stack *t = XOBNEW (&parser_obstack, \
302 struct c_declspec_stack); \
303 t->current_declspecs = current_declspecs; \
304 t->prefix_attributes = prefix_attributes; \
305 t->all_prefix_attributes = all_prefix_attributes; \
306 t->next = declspec_stack; \
307 declspec_stack = t; \
308 } while (0)
310 #define POP_DECLSPEC_STACK \
311 do { \
312 current_declspecs = declspec_stack->current_declspecs; \
313 prefix_attributes = declspec_stack->prefix_attributes; \
314 all_prefix_attributes = declspec_stack->all_prefix_attributes; \
315 declspec_stack = declspec_stack->next; \
316 } while (0)
318 /* For __extension__, save/restore the warning flags which are
319 controlled by __extension__. */
320 #define SAVE_EXT_FLAGS() \
321 (pedantic \
322 | (warn_pointer_arith << 1) \
323 | (warn_traditional << 2) \
324 | (flag_iso << 3))
326 #define RESTORE_EXT_FLAGS(val) \
327 do { \
328 pedantic = val & 1; \
329 warn_pointer_arith = (val >> 1) & 1; \
330 warn_traditional = (val >> 2) & 1; \
331 flag_iso = (val >> 3) & 1; \
332 } while (0)
334 @@ifobjc
335 /* Objective-C specific parser/lexer information */
337 static int objc_pq_context = 0;
339 /* The following flag is needed to contextualize ObjC lexical analysis.
340 In some cases (e.g., 'int NSObject;'), it is undesirable to bind
341 an identifier to an ObjC class, even if a class with that name
342 exists. */
343 static int objc_need_raw_identifier;
344 #define OBJC_NEED_RAW_IDENTIFIER(VAL) objc_need_raw_identifier = VAL
345 @@end_ifobjc
347 @@ifc
348 #define OBJC_NEED_RAW_IDENTIFIER(VAL) /* nothing */
349 @@end_ifc
351 /* Tell yyparse how to print a token's value, if yydebug is set. */
353 #define YYPRINT(FILE,YYCHAR,YYLVAL) yyprint(FILE,YYCHAR,YYLVAL)
355 static void yyprint (FILE *, int, YYSTYPE);
356 static void yyerror (const char *);
357 static int yylexname (void);
358 static inline int _yylex (void);
359 static int yylex (void);
360 static void init_reswords (void);
362 /* Initialization routine for this file. */
363 void
364 c_parse_init (void)
365 {
366 init_reswords ();
367 }
369 %}
370 \f
371 %%
372 program: /* empty */
373 { if (pedantic)
374 pedwarn ("ISO C forbids an empty source file");
375 }
376 | extdefs
377 ;
379 /* the reason for the strange actions in this rule
380 is so that notype_initdecls when reached via datadef
381 can find valid declaration specifiers in $0. */
383 extdefs:
384 save_obstack_position { $<dsptype>$ = NULL; } extdef
385 { obstack_free (&parser_obstack, $1); }
386 | extdefs save_obstack_position
387 { $<dsptype>$ = NULL; ggc_collect (); } extdef
388 { obstack_free (&parser_obstack, $2); }
389 ;
391 extdef:
392 fndef
393 | datadef
394 | asmdef
395 | extension extdef
396 { RESTORE_EXT_FLAGS ($1); }
397 @@ifobjc
398 | objcdef
399 @@end_ifobjc
400 ;
402 /* Record the current position of parser_obstack before a
403 declaration to restore it afterwards. */
404 save_obstack_position:
405 { $$ = obstack_alloc (&parser_obstack, 0); }
406 ;
408 datadef:
409 setspecs notype_initdecls ';'
410 { pedwarn ("data definition has no type or storage class");
411 POP_DECLSPEC_STACK; }
412 | declspecs_nots setspecs notype_initdecls ';'
413 { POP_DECLSPEC_STACK; }
414 | declspecs_ts setspecs initdecls ';'
415 { POP_DECLSPEC_STACK; }
416 | declspecs ';'
417 { shadow_tag (finish_declspecs ($1)); }
418 | error ';'
419 | error '}'
420 | ';'
421 { if (pedantic)
422 pedwarn ("ISO C does not allow extra %<;%> outside of a function"); }
423 ;
424 \f
425 fndef:
426 declspecs_ts setspecs declarator
427 { if (!start_function (current_declspecs, $3,
428 all_prefix_attributes))
429 YYERROR1;
430 }
431 old_style_parm_decls save_location
432 { DECL_SOURCE_LOCATION (current_function_decl) = $6;
433 store_parm_decls (); }
434 compstmt_or_error
435 { finish_function ();
436 POP_DECLSPEC_STACK; }
437 | declspecs_ts setspecs declarator error
438 { POP_DECLSPEC_STACK; }
439 | declspecs_nots setspecs notype_declarator
440 { if (!start_function (current_declspecs, $3,
441 all_prefix_attributes))
442 YYERROR1;
443 }
444 old_style_parm_decls save_location
445 { DECL_SOURCE_LOCATION (current_function_decl) = $6;
446 store_parm_decls (); }
447 compstmt_or_error
448 { finish_function ();
449 POP_DECLSPEC_STACK; }
450 | declspecs_nots setspecs notype_declarator error
451 { POP_DECLSPEC_STACK; }
452 | setspecs notype_declarator
453 { if (!start_function (current_declspecs, $2,
454 all_prefix_attributes))
455 YYERROR1;
456 }
457 old_style_parm_decls save_location
458 { DECL_SOURCE_LOCATION (current_function_decl) = $5;
459 store_parm_decls (); }
460 compstmt_or_error
461 { finish_function ();
462 POP_DECLSPEC_STACK; }
463 | setspecs notype_declarator error
464 { POP_DECLSPEC_STACK; }
465 ;
467 identifier:
468 IDENTIFIER
469 | TYPENAME
470 @@ifobjc
471 | CLASSNAME
472 @@end_ifobjc
473 ;
475 unop: '&'
476 { $$ = ADDR_EXPR; }
477 | '-'
478 { $$ = NEGATE_EXPR; }
479 | '+'
480 { $$ = CONVERT_EXPR;
481 @@ifc
482 if (warn_traditional && !in_system_header)
483 warning ("traditional C rejects the unary plus operator");
484 @@end_ifc
485 }
486 | PLUSPLUS
487 { $$ = PREINCREMENT_EXPR; }
488 | MINUSMINUS
489 { $$ = PREDECREMENT_EXPR; }
490 | '~'
491 { $$ = BIT_NOT_EXPR; }
492 | '!'
493 { $$ = TRUTH_NOT_EXPR; }
494 ;
496 expr: expr_no_commas
497 | expr ',' expr_no_commas
498 { $$.value = build_compound_expr ($1.value, $3.value);
499 $$.original_code = COMPOUND_EXPR; }
500 ;
502 exprlist:
503 /* empty */
504 { $$ = NULL_TREE; }
505 | nonnull_exprlist
506 ;
508 nonnull_exprlist:
509 expr_no_commas
510 { $$ = build_tree_list (NULL_TREE, $1.value); }
511 | nonnull_exprlist ',' expr_no_commas
512 { chainon ($1, build_tree_list (NULL_TREE, $3.value)); }
513 ;
515 unary_expr:
516 primary
517 | '*' cast_expr %prec UNARY
518 { $$.value = build_indirect_ref ($2.value, "unary *");
519 $$.original_code = ERROR_MARK; }
520 /* __extension__ turns off -pedantic for following primary. */
521 | extension cast_expr %prec UNARY
522 { $$ = $2;
523 RESTORE_EXT_FLAGS ($1); }
524 | unop cast_expr %prec UNARY
525 { $$.value = build_unary_op ($1, $2.value, 0);
526 overflow_warning ($$.value);
527 $$.original_code = ERROR_MARK; }
528 /* Refer to the address of a label as a pointer. */
529 | ANDAND identifier
530 { $$.value = finish_label_address_expr ($2);
531 $$.original_code = ERROR_MARK; }
532 | sizeof unary_expr %prec UNARY
533 { skip_evaluation--;
534 in_sizeof--;
535 if (TREE_CODE ($2.value) == COMPONENT_REF
536 && DECL_C_BIT_FIELD (TREE_OPERAND ($2.value, 1)))
537 error ("%<sizeof%> applied to a bit-field");
538 $$ = c_expr_sizeof_expr ($2); }
539 | sizeof '(' typename ')' %prec HYPERUNARY
540 { skip_evaluation--;
541 in_sizeof--;
542 $$ = c_expr_sizeof_type ($3); }
543 | alignof unary_expr %prec UNARY
544 { skip_evaluation--;
545 in_alignof--;
546 $$.value = c_alignof_expr ($2.value);
547 $$.original_code = ERROR_MARK; }
548 | alignof '(' typename ')' %prec HYPERUNARY
549 { skip_evaluation--;
550 in_alignof--;
551 $$.value = c_alignof (groktypename ($3));
552 $$.original_code = ERROR_MARK; }
553 | REALPART cast_expr %prec UNARY
554 { $$.value = build_unary_op (REALPART_EXPR, $2.value, 0);
555 $$.original_code = ERROR_MARK; }
556 | IMAGPART cast_expr %prec UNARY
557 { $$.value = build_unary_op (IMAGPART_EXPR, $2.value, 0);
558 $$.original_code = ERROR_MARK; }
559 ;
561 sizeof:
562 SIZEOF { skip_evaluation++; in_sizeof++; }
563 ;
565 alignof:
566 ALIGNOF { skip_evaluation++; in_alignof++; }
567 ;
569 typeof:
570 TYPEOF { skip_evaluation++; in_typeof++; }
571 ;
573 cast_expr:
574 unary_expr
575 | '(' typename ')' cast_expr %prec UNARY
576 { $$.value = c_cast_expr ($2, $4.value);
577 $$.original_code = ERROR_MARK; }
578 ;
580 expr_no_commas:
581 cast_expr
582 | expr_no_commas '+' expr_no_commas
583 { $$ = parser_build_binary_op ($2, $1, $3); }
584 | expr_no_commas '-' expr_no_commas
585 { $$ = parser_build_binary_op ($2, $1, $3); }
586 | expr_no_commas '*' expr_no_commas
587 { $$ = parser_build_binary_op ($2, $1, $3); }
588 | expr_no_commas '/' expr_no_commas
589 { $$ = parser_build_binary_op ($2, $1, $3); }
590 | expr_no_commas '%' expr_no_commas
591 { $$ = parser_build_binary_op ($2, $1, $3); }
592 | expr_no_commas LSHIFT expr_no_commas
593 { $$ = parser_build_binary_op ($2, $1, $3); }
594 | expr_no_commas RSHIFT expr_no_commas
595 { $$ = parser_build_binary_op ($2, $1, $3); }
596 | expr_no_commas ARITHCOMPARE expr_no_commas
597 { $$ = parser_build_binary_op ($2, $1, $3); }
598 | expr_no_commas EQCOMPARE expr_no_commas
599 { $$ = parser_build_binary_op ($2, $1, $3); }
600 | expr_no_commas '&' expr_no_commas
601 { $$ = parser_build_binary_op ($2, $1, $3); }
602 | expr_no_commas '|' expr_no_commas
603 { $$ = parser_build_binary_op ($2, $1, $3); }
604 | expr_no_commas '^' expr_no_commas
605 { $$ = parser_build_binary_op ($2, $1, $3); }
606 | expr_no_commas ANDAND
607 { $1.value = lang_hooks.truthvalue_conversion
608 (default_conversion ($1.value));
609 skip_evaluation += $1.value == truthvalue_false_node; }
610 expr_no_commas
611 { skip_evaluation -= $1.value == truthvalue_false_node;
612 $$ = parser_build_binary_op (TRUTH_ANDIF_EXPR, $1, $4); }
613 | expr_no_commas OROR
614 { $1.value = lang_hooks.truthvalue_conversion
615 (default_conversion ($1.value));
616 skip_evaluation += $1.value == truthvalue_true_node; }
617 expr_no_commas
618 { skip_evaluation -= $1.value == truthvalue_true_node;
619 $$ = parser_build_binary_op (TRUTH_ORIF_EXPR, $1, $4); }
620 | expr_no_commas '?'
621 { $1.value = lang_hooks.truthvalue_conversion
622 (default_conversion ($1.value));
623 skip_evaluation += $1.value == truthvalue_false_node; }
624 expr ':'
625 { skip_evaluation += (($1.value == truthvalue_true_node)
626 - ($1.value == truthvalue_false_node)); }
627 expr_no_commas
628 { skip_evaluation -= $1.value == truthvalue_true_node;
629 $$.value = build_conditional_expr ($1.value, $4.value,
630 $7.value);
631 $$.original_code = ERROR_MARK; }
632 | expr_no_commas '?'
633 { if (pedantic)
634 pedwarn ("ISO C forbids omitting the middle term of a ?: expression");
635 /* Make sure first operand is calculated only once. */
636 $<ttype>2 = save_expr (default_conversion ($1.value));
637 $1.value = lang_hooks.truthvalue_conversion ($<ttype>2);
638 skip_evaluation += $1.value == truthvalue_true_node; }
639 ':' expr_no_commas
640 { skip_evaluation -= $1.value == truthvalue_true_node;
641 $$.value = build_conditional_expr ($1.value, $<ttype>2,
642 $5.value);
643 $$.original_code = ERROR_MARK; }
644 | expr_no_commas '=' expr_no_commas
645 { $$.value = build_modify_expr ($1.value, NOP_EXPR, $3.value);
646 $$.original_code = MODIFY_EXPR;
647 }
648 | expr_no_commas ASSIGN expr_no_commas
649 { $$.value = build_modify_expr ($1.value, $2, $3.value);
650 TREE_NO_WARNING ($$.value) = 1;
651 $$.original_code = ERROR_MARK;
652 }
653 ;
655 primary:
656 IDENTIFIER
657 {
658 if (yychar == YYEMPTY)
659 yychar = YYLEX;
660 $$.value = build_external_ref ($1, yychar == '(');
661 $$.original_code = ERROR_MARK;
662 }
663 | CONSTANT
664 { $$.value = $1; $$.original_code = ERROR_MARK; }
665 | STRING
666 { $$.value = $1; $$.original_code = STRING_CST; }
667 | FUNC_NAME
668 { $$.value = fname_decl (C_RID_CODE ($1), $1);
669 $$.original_code = ERROR_MARK; }
670 | '(' typename ')' '{'
671 { start_init (NULL_TREE, NULL, 0);
672 $<ttype>$ = groktypename ($2);
673 if (C_TYPE_VARIABLE_SIZE ($<ttype>$))
674 {
675 error ("compound literal has variable size");
676 $<ttype>$ = error_mark_node;
677 }
678 really_start_incremental_init ($<ttype>$); }
679 initlist_maybe_comma '}' %prec UNARY
680 { struct c_expr init = pop_init_level (0);
681 tree constructor = init.value;
682 tree type = $<ttype>5;
683 finish_init ();
684 maybe_warn_string_init (type, init);
686 if (pedantic && !flag_isoc99)
687 pedwarn ("ISO C90 forbids compound literals");
688 $$.value = build_compound_literal (type, constructor);
689 $$.original_code = ERROR_MARK;
690 }
691 | '(' expr ')'
692 { $$.value = $2.value;
693 if (TREE_CODE ($$.value) == MODIFY_EXPR)
694 TREE_NO_WARNING ($$.value) = 1;
695 $$.original_code = ERROR_MARK; }
696 | '(' error ')'
697 { $$.value = error_mark_node; $$.original_code = ERROR_MARK; }
698 | compstmt_primary_start compstmt_nostart ')'
699 { if (pedantic)
700 pedwarn ("ISO C forbids braced-groups within expressions");
701 $$.value = c_finish_stmt_expr ($1);
702 $$.original_code = ERROR_MARK;
703 }
704 | compstmt_primary_start error ')'
705 { c_finish_stmt_expr ($1);
706 $$.value = error_mark_node;
707 $$.original_code = ERROR_MARK;
708 }
709 | primary '(' exprlist ')' %prec '.'
710 { $$.value = build_function_call ($1.value, $3);
711 $$.original_code = ERROR_MARK; }
712 | VA_ARG '(' expr_no_commas ',' typename ')'
713 { $$.value = build_va_arg ($3.value, groktypename ($5));
714 $$.original_code = ERROR_MARK; }
716 | OFFSETOF '(' typename ','
717 { tree type = groktypename ($3);
718 if (type == error_mark_node)
719 offsetof_base = error_mark_node;
720 else
721 offsetof_base = build1 (INDIRECT_REF, type, NULL);
722 }
723 offsetof_member_designator ')'
724 { $$.value = fold_offsetof ($6);
725 $$.original_code = ERROR_MARK; }
726 | OFFSETOF '(' error ')'
727 { $$.value = error_mark_node; $$.original_code = ERROR_MARK; }
728 | CHOOSE_EXPR '(' expr_no_commas ',' expr_no_commas ','
729 expr_no_commas ')'
730 {
731 tree c;
733 c = fold ($3.value);
734 STRIP_NOPS (c);
735 if (TREE_CODE (c) != INTEGER_CST)
736 error ("first argument to %<__builtin_choose_expr%> not"
737 " a constant");
738 $$ = integer_zerop (c) ? $7 : $5;
739 }
740 | CHOOSE_EXPR '(' error ')'
741 { $$.value = error_mark_node; $$.original_code = ERROR_MARK; }
742 | TYPES_COMPATIBLE_P '(' typename ',' typename ')'
743 {
744 tree e1, e2;
746 e1 = TYPE_MAIN_VARIANT (groktypename ($3));
747 e2 = TYPE_MAIN_VARIANT (groktypename ($5));
749 $$.value = comptypes (e1, e2)
750 ? build_int_cst (NULL_TREE, 1)
751 : build_int_cst (NULL_TREE, 0);
752 $$.original_code = ERROR_MARK;
753 }
754 | TYPES_COMPATIBLE_P '(' error ')'
755 { $$.value = error_mark_node; $$.original_code = ERROR_MARK; }
756 | primary '[' expr ']' %prec '.'
757 { $$.value = build_array_ref ($1.value, $3.value);
758 $$.original_code = ERROR_MARK; }
759 | primary '.' identifier
760 { $$.value = build_component_ref ($1.value, $3);
761 $$.original_code = ERROR_MARK; }
762 | primary POINTSAT identifier
763 {
764 tree expr = build_indirect_ref ($1.value, "->");
765 $$.value = build_component_ref (expr, $3);
766 $$.original_code = ERROR_MARK;
767 }
768 | primary PLUSPLUS
769 { $$.value = build_unary_op (POSTINCREMENT_EXPR, $1.value, 0);
770 $$.original_code = ERROR_MARK; }
771 | primary MINUSMINUS
772 { $$.value = build_unary_op (POSTDECREMENT_EXPR, $1.value, 0);
773 $$.original_code = ERROR_MARK; }
774 @@ifobjc
775 | objcmessageexpr
776 { $$.value = objc_build_message_expr ($1);
777 $$.original_code = ERROR_MARK; }
778 | objcselectorexpr
779 { $$.value = objc_build_selector_expr ($1);
780 $$.original_code = ERROR_MARK; }
781 | objcprotocolexpr
782 { $$.value = objc_build_protocol_expr ($1);
783 $$.original_code = ERROR_MARK; }
784 | objcencodeexpr
785 { $$.value = objc_build_encode_expr ($1);
786 $$.original_code = ERROR_MARK; }
787 | OBJC_STRING
788 { $$.value = objc_build_string_object ($1);
789 $$.original_code = ERROR_MARK; }
790 @@end_ifobjc
791 ;
793 /* This is the second argument to __builtin_offsetof. We must have one
794 identifier, and beyond that we want to accept sub structure and sub
795 array references. */
797 offsetof_member_designator:
798 identifier
799 { $$ = build_component_ref (offsetof_base, $1); }
800 | offsetof_member_designator '.' identifier
801 { $$ = build_component_ref ($1, $3); }
802 | offsetof_member_designator '[' expr ']'
803 { $$ = build_array_ref ($1, $3.value); }
804 ;
806 old_style_parm_decls:
807 /* empty */
808 | datadecls
809 ;
811 /* The following are analogous to lineno_decl, decls and decl
812 except that they do not allow nested functions.
813 They are used for old-style parm decls. */
814 lineno_datadecl:
815 save_location datadecl
816 { }
817 ;
819 datadecls:
820 lineno_datadecl
821 | errstmt
822 | datadecls lineno_datadecl
823 | lineno_datadecl errstmt
824 ;
826 /* We don't allow prefix attributes here because they cause reduce/reduce
827 conflicts: we can't know whether we're parsing a function decl with
828 attribute suffix, or function defn with attribute prefix on first old
829 style parm. */
830 datadecl:
831 declspecs_ts_nosa setspecs initdecls ';'
832 { POP_DECLSPEC_STACK; }
833 | declspecs_nots_nosa setspecs notype_initdecls ';'
834 { POP_DECLSPEC_STACK; }
835 | declspecs_ts_nosa ';'
836 { shadow_tag_warned (finish_declspecs ($1), 1);
837 pedwarn ("empty declaration"); }
838 | declspecs_nots_nosa ';'
839 { pedwarn ("empty declaration"); }
840 ;
842 /* This combination which saves a lineno before a decl
843 is the normal thing to use, rather than decl itself.
844 This is to avoid shift/reduce conflicts in contexts
845 where statement labels are allowed. */
846 lineno_decl:
847 save_location decl
848 { }
849 ;
851 /* records the type and storage class specs to use for processing
852 the declarators that follow.
853 Maintains a stack of outer-level values of current_declspecs,
854 for the sake of parm declarations nested in function declarators. */
855 setspecs: /* empty */
856 { pending_xref_error ();
857 PUSH_DECLSPEC_STACK;
858 if ($<dsptype>0)
859 {
860 prefix_attributes = $<dsptype>0->attrs;
861 $<dsptype>0->attrs = NULL_TREE;
862 current_declspecs = $<dsptype>0;
863 }
864 else
865 {
866 prefix_attributes = NULL_TREE;
867 current_declspecs = build_null_declspecs ();
868 }
869 current_declspecs = finish_declspecs (current_declspecs);
870 all_prefix_attributes = prefix_attributes; }
871 ;
873 /* Possibly attributes after a comma, which should reset all_prefix_attributes
874 to prefix_attributes with these ones chained on the front. */
875 maybe_resetattrs:
876 maybe_attribute
877 { all_prefix_attributes = chainon ($1, prefix_attributes); }
878 ;
880 decl:
881 declspecs_ts setspecs initdecls ';'
882 { POP_DECLSPEC_STACK; }
883 | declspecs_nots setspecs notype_initdecls ';'
884 { POP_DECLSPEC_STACK; }
885 | declspecs_ts setspecs nested_function
886 { POP_DECLSPEC_STACK; }
887 | declspecs_nots setspecs notype_nested_function
888 { POP_DECLSPEC_STACK; }
889 | declspecs ';'
890 { shadow_tag (finish_declspecs ($1)); }
891 | extension decl
892 { RESTORE_EXT_FLAGS ($1); }
893 ;
895 /* A list of declaration specifiers. These are:
897 - Storage class specifiers (scspec), which for GCC currently includes
898 function specifiers ("inline").
900 - Type specifiers (typespec_*).
902 - Type qualifiers (TYPE_QUAL).
904 - Attribute specifier lists (attributes).
906 The various cases below are classified according to:
908 (a) Whether a storage class specifier is included or not; some
909 places in the grammar disallow storage class specifiers (_sc or _nosc).
911 (b) Whether a type specifier has been seen; after a type specifier,
912 a typedef name is an identifier to redeclare (_ts or _nots).
914 (c) Whether the list starts with an attribute; in certain places,
915 the grammar requires specifiers that don't start with an attribute
916 (_sa or _nosa).
918 (d) Whether the list ends with an attribute (or a specifier such that
919 any following attribute would have been parsed as part of that specifier);
920 this avoids shift-reduce conflicts in the parsing of attributes
921 (_ea or _noea).
923 TODO:
925 (i) Distinguish between function specifiers and storage class specifiers,
926 at least for the purpose of warnings about obsolescent usage.
928 (ii) Halve the number of productions here by eliminating the _sc/_nosc
929 distinction and instead checking where required that storage class
930 specifiers aren't present. */
932 /* Declspecs which contain at least one type specifier or typedef name.
933 (Just `const' or `volatile' is not enough.)
934 A typedef'd name following these is taken as a name to be declared. */
936 declspecs_nosc_nots_nosa_noea:
937 TYPE_QUAL
938 { $$ = declspecs_add_qual (build_null_declspecs (), $1); }
939 | declspecs_nosc_nots_nosa_noea TYPE_QUAL
940 { $$ = declspecs_add_qual ($1, $2); }
941 | declspecs_nosc_nots_nosa_ea TYPE_QUAL
942 { $$ = declspecs_add_qual ($1, $2); }
943 ;
945 declspecs_nosc_nots_nosa_ea:
946 declspecs_nosc_nots_nosa_noea attributes
947 { $$ = declspecs_add_attrs ($1, $2); }
948 ;
950 declspecs_nosc_nots_sa_noea:
951 declspecs_nosc_nots_sa_noea TYPE_QUAL
952 { $$ = declspecs_add_qual ($1, $2); }
953 | declspecs_nosc_nots_sa_ea TYPE_QUAL
954 { $$ = declspecs_add_qual ($1, $2); }
955 ;
957 declspecs_nosc_nots_sa_ea:
958 attributes
959 { $$ = declspecs_add_attrs (build_null_declspecs (), $1); }
960 | declspecs_nosc_nots_sa_noea attributes
961 { $$ = declspecs_add_attrs ($1, $2); }
962 ;
964 declspecs_nosc_ts_nosa_noea:
965 typespec_nonattr
966 { $$ = declspecs_add_type (build_null_declspecs (), $1); }
967 | declspecs_nosc_ts_nosa_noea TYPE_QUAL
968 { $$ = declspecs_add_qual ($1, $2); }
969 | declspecs_nosc_ts_nosa_ea TYPE_QUAL
970 { $$ = declspecs_add_qual ($1, $2); }
971 | declspecs_nosc_ts_nosa_noea typespec_reserved_nonattr
972 { $$ = declspecs_add_type ($1, $2); }
973 | declspecs_nosc_ts_nosa_ea typespec_reserved_nonattr
974 { $$ = declspecs_add_type ($1, $2); }
975 | declspecs_nosc_nots_nosa_noea typespec_nonattr
976 { $$ = declspecs_add_type ($1, $2); }
977 | declspecs_nosc_nots_nosa_ea typespec_nonattr
978 { $$ = declspecs_add_type ($1, $2); }
979 ;
981 declspecs_nosc_ts_nosa_ea:
982 typespec_attr
983 { $$ = declspecs_add_type (build_null_declspecs (), $1); }
984 | declspecs_nosc_ts_nosa_noea attributes
985 { $$ = declspecs_add_attrs ($1, $2); }
986 | declspecs_nosc_ts_nosa_noea typespec_reserved_attr
987 { $$ = declspecs_add_type ($1, $2); }
988 | declspecs_nosc_ts_nosa_ea typespec_reserved_attr
989 { $$ = declspecs_add_type ($1, $2); }
990 | declspecs_nosc_nots_nosa_noea typespec_attr
991 { $$ = declspecs_add_type ($1, $2); }
992 | declspecs_nosc_nots_nosa_ea typespec_attr
993 { $$ = declspecs_add_type ($1, $2); }
994 ;
996 declspecs_nosc_ts_sa_noea:
997 declspecs_nosc_ts_sa_noea TYPE_QUAL
998 { $$ = declspecs_add_qual ($1, $2); }
999 | declspecs_nosc_ts_sa_ea TYPE_QUAL
1000 { $$ = declspecs_add_qual ($1, $2); }
1001 | declspecs_nosc_ts_sa_noea typespec_reserved_nonattr
1002 { $$ = declspecs_add_type ($1, $2); }
1003 | declspecs_nosc_ts_sa_ea typespec_reserved_nonattr
1004 { $$ = declspecs_add_type ($1, $2); }
1005 | declspecs_nosc_nots_sa_noea typespec_nonattr
1006 { $$ = declspecs_add_type ($1, $2); }
1007 | declspecs_nosc_nots_sa_ea typespec_nonattr
1008 { $$ = declspecs_add_type ($1, $2); }
1009 ;
1011 declspecs_nosc_ts_sa_ea:
1012 declspecs_nosc_ts_sa_noea attributes
1013 { $$ = declspecs_add_attrs ($1, $2); }
1014 | declspecs_nosc_ts_sa_noea typespec_reserved_attr
1015 { $$ = declspecs_add_type ($1, $2); }
1016 | declspecs_nosc_ts_sa_ea typespec_reserved_attr
1017 { $$ = declspecs_add_type ($1, $2); }
1018 | declspecs_nosc_nots_sa_noea typespec_attr
1019 { $$ = declspecs_add_type ($1, $2); }
1020 | declspecs_nosc_nots_sa_ea typespec_attr
1021 { $$ = declspecs_add_type ($1, $2); }
1022 ;
1024 declspecs_sc_nots_nosa_noea:
1025 scspec
1026 { $$ = declspecs_add_scspec (build_null_declspecs (), $1); }
1027 | declspecs_sc_nots_nosa_noea TYPE_QUAL
1028 { $$ = declspecs_add_qual ($1, $2); }
1029 | declspecs_sc_nots_nosa_ea TYPE_QUAL
1030 { $$ = declspecs_add_qual ($1, $2); }
1031 | declspecs_nosc_nots_nosa_noea scspec
1032 { $$ = declspecs_add_scspec ($1, $2); }
1033 | declspecs_nosc_nots_nosa_ea scspec
1034 { $$ = declspecs_add_scspec ($1, $2); }
1035 | declspecs_sc_nots_nosa_noea scspec
1036 { $$ = declspecs_add_scspec ($1, $2); }
1037 | declspecs_sc_nots_nosa_ea scspec
1038 { $$ = declspecs_add_scspec ($1, $2); }
1039 ;
1041 declspecs_sc_nots_nosa_ea:
1042 declspecs_sc_nots_nosa_noea attributes
1043 { $$ = declspecs_add_attrs ($1, $2); }
1044 ;
1046 declspecs_sc_nots_sa_noea:
1047 declspecs_sc_nots_sa_noea TYPE_QUAL
1048 { $$ = declspecs_add_qual ($1, $2); }
1049 | declspecs_sc_nots_sa_ea TYPE_QUAL
1050 { $$ = declspecs_add_qual ($1, $2); }
1051 | declspecs_nosc_nots_sa_noea scspec
1052 { $$ = declspecs_add_scspec ($1, $2); }
1053 | declspecs_nosc_nots_sa_ea scspec
1054 { $$ = declspecs_add_scspec ($1, $2); }
1055 | declspecs_sc_nots_sa_noea scspec
1056 { $$ = declspecs_add_scspec ($1, $2); }
1057 | declspecs_sc_nots_sa_ea scspec
1058 { $$ = declspecs_add_scspec ($1, $2); }
1059 ;
1061 declspecs_sc_nots_sa_ea:
1062 declspecs_sc_nots_sa_noea attributes
1063 { $$ = declspecs_add_attrs ($1, $2); }
1064 ;
1066 declspecs_sc_ts_nosa_noea:
1067 declspecs_sc_ts_nosa_noea TYPE_QUAL
1068 { $$ = declspecs_add_qual ($1, $2); }
1069 | declspecs_sc_ts_nosa_ea TYPE_QUAL
1070 { $$ = declspecs_add_qual ($1, $2); }
1071 | declspecs_sc_ts_nosa_noea typespec_reserved_nonattr
1072 { $$ = declspecs_add_type ($1, $2); }
1073 | declspecs_sc_ts_nosa_ea typespec_reserved_nonattr
1074 { $$ = declspecs_add_type ($1, $2); }
1075 | declspecs_sc_nots_nosa_noea typespec_nonattr
1076 { $$ = declspecs_add_type ($1, $2); }
1077 | declspecs_sc_nots_nosa_ea typespec_nonattr
1078 { $$ = declspecs_add_type ($1, $2); }
1079 | declspecs_nosc_ts_nosa_noea scspec
1080 { $$ = declspecs_add_scspec ($1, $2); }
1081 | declspecs_nosc_ts_nosa_ea scspec
1082 { $$ = declspecs_add_scspec ($1, $2); }
1083 | declspecs_sc_ts_nosa_noea scspec
1084 { $$ = declspecs_add_scspec ($1, $2); }
1085 | declspecs_sc_ts_nosa_ea scspec
1086 { $$ = declspecs_add_scspec ($1, $2); }
1087 ;
1089 declspecs_sc_ts_nosa_ea:
1090 declspecs_sc_ts_nosa_noea attributes
1091 { $$ = declspecs_add_attrs ($1, $2); }
1092 | declspecs_sc_ts_nosa_noea typespec_reserved_attr
1093 { $$ = declspecs_add_type ($1, $2); }
1094 | declspecs_sc_ts_nosa_ea typespec_reserved_attr
1095 { $$ = declspecs_add_type ($1, $2); }
1096 | declspecs_sc_nots_nosa_noea typespec_attr
1097 { $$ = declspecs_add_type ($1, $2); }
1098 | declspecs_sc_nots_nosa_ea typespec_attr
1099 { $$ = declspecs_add_type ($1, $2); }
1100 ;
1102 declspecs_sc_ts_sa_noea:
1103 declspecs_sc_ts_sa_noea TYPE_QUAL
1104 { $$ = declspecs_add_qual ($1, $2); }
1105 | declspecs_sc_ts_sa_ea TYPE_QUAL
1106 { $$ = declspecs_add_qual ($1, $2); }
1107 | declspecs_sc_ts_sa_noea typespec_reserved_nonattr
1108 { $$ = declspecs_add_type ($1, $2); }
1109 | declspecs_sc_ts_sa_ea typespec_reserved_nonattr
1110 { $$ = declspecs_add_type ($1, $2); }
1111 | declspecs_sc_nots_sa_noea typespec_nonattr
1112 { $$ = declspecs_add_type ($1, $2); }
1113 | declspecs_sc_nots_sa_ea typespec_nonattr
1114 { $$ = declspecs_add_type ($1, $2); }
1115 | declspecs_nosc_ts_sa_noea scspec
1116 { $$ = declspecs_add_scspec ($1, $2); }
1117 | declspecs_nosc_ts_sa_ea scspec
1118 { $$ = declspecs_add_scspec ($1, $2); }
1119 | declspecs_sc_ts_sa_noea scspec
1120 { $$ = declspecs_add_scspec ($1, $2); }
1121 | declspecs_sc_ts_sa_ea scspec
1122 { $$ = declspecs_add_scspec ($1, $2); }
1123 ;
1125 declspecs_sc_ts_sa_ea:
1126 declspecs_sc_ts_sa_noea attributes
1127 { $$ = declspecs_add_attrs ($1, $2); }
1128 | declspecs_sc_ts_sa_noea typespec_reserved_attr
1129 { $$ = declspecs_add_type ($1, $2); }
1130 | declspecs_sc_ts_sa_ea typespec_reserved_attr
1131 { $$ = declspecs_add_type ($1, $2); }
1132 | declspecs_sc_nots_sa_noea typespec_attr
1133 { $$ = declspecs_add_type ($1, $2); }
1134 | declspecs_sc_nots_sa_ea typespec_attr
1135 { $$ = declspecs_add_type ($1, $2); }
1136 ;
1138 /* Particular useful classes of declspecs. */
1139 declspecs_ts:
1140 declspecs_nosc_ts_nosa_noea
1141 | declspecs_nosc_ts_nosa_ea
1142 | declspecs_nosc_ts_sa_noea
1143 | declspecs_nosc_ts_sa_ea
1144 | declspecs_sc_ts_nosa_noea
1145 | declspecs_sc_ts_nosa_ea
1146 | declspecs_sc_ts_sa_noea
1147 | declspecs_sc_ts_sa_ea
1148 ;
1150 declspecs_nots:
1151 declspecs_nosc_nots_nosa_noea
1152 | declspecs_nosc_nots_nosa_ea
1153 | declspecs_nosc_nots_sa_noea
1154 | declspecs_nosc_nots_sa_ea
1155 | declspecs_sc_nots_nosa_noea
1156 | declspecs_sc_nots_nosa_ea
1157 | declspecs_sc_nots_sa_noea
1158 | declspecs_sc_nots_sa_ea
1159 ;
1161 declspecs_ts_nosa:
1162 declspecs_nosc_ts_nosa_noea
1163 | declspecs_nosc_ts_nosa_ea
1164 | declspecs_sc_ts_nosa_noea
1165 | declspecs_sc_ts_nosa_ea
1166 ;
1168 declspecs_nots_nosa:
1169 declspecs_nosc_nots_nosa_noea
1170 | declspecs_nosc_nots_nosa_ea
1171 | declspecs_sc_nots_nosa_noea
1172 | declspecs_sc_nots_nosa_ea
1173 ;
1175 declspecs_nosc_ts:
1176 declspecs_nosc_ts_nosa_noea
1177 | declspecs_nosc_ts_nosa_ea
1178 | declspecs_nosc_ts_sa_noea
1179 | declspecs_nosc_ts_sa_ea
1180 ;
1182 declspecs_nosc_nots:
1183 declspecs_nosc_nots_nosa_noea
1184 | declspecs_nosc_nots_nosa_ea
1185 | declspecs_nosc_nots_sa_noea
1186 | declspecs_nosc_nots_sa_ea
1187 ;
1189 declspecs_nosc:
1190 declspecs_nosc_ts_nosa_noea
1191 | declspecs_nosc_ts_nosa_ea
1192 | declspecs_nosc_ts_sa_noea
1193 | declspecs_nosc_ts_sa_ea
1194 | declspecs_nosc_nots_nosa_noea
1195 | declspecs_nosc_nots_nosa_ea
1196 | declspecs_nosc_nots_sa_noea
1197 | declspecs_nosc_nots_sa_ea
1198 ;
1200 declspecs:
1201 declspecs_nosc_nots_nosa_noea
1202 | declspecs_nosc_nots_nosa_ea
1203 | declspecs_nosc_nots_sa_noea
1204 | declspecs_nosc_nots_sa_ea
1205 | declspecs_nosc_ts_nosa_noea
1206 | declspecs_nosc_ts_nosa_ea
1207 | declspecs_nosc_ts_sa_noea
1208 | declspecs_nosc_ts_sa_ea
1209 | declspecs_sc_nots_nosa_noea
1210 | declspecs_sc_nots_nosa_ea
1211 | declspecs_sc_nots_sa_noea
1212 | declspecs_sc_nots_sa_ea
1213 | declspecs_sc_ts_nosa_noea
1214 | declspecs_sc_ts_nosa_ea
1215 | declspecs_sc_ts_sa_noea
1216 | declspecs_sc_ts_sa_ea
1217 ;
1219 /* A (possibly empty) sequence of type qualifiers and attributes. */
1220 maybe_type_quals_attrs:
1221 /* empty */
1222 { $$ = NULL; }
1223 | declspecs_nosc_nots
1224 { $$ = $1; }
1225 ;
1227 /* A type specifier (but not a type qualifier).
1228 Once we have seen one of these in a declaration,
1229 if a typedef name appears then it is being redeclared.
1231 The _reserved versions start with a reserved word and may appear anywhere
1232 in the declaration specifiers; the _nonreserved versions may only
1233 appear before any other type specifiers, and after that are (if names)
1234 being redeclared.
1236 FIXME: should the _nonreserved version be restricted to names being
1237 redeclared only? The other entries there relate only the GNU extensions
1238 and Objective C, and are historically parsed thus, and don't make sense
1239 after other type specifiers, but it might be cleaner to count them as
1240 _reserved.
1242 _attr means: specifiers that either end with attributes,
1243 or are such that any following attributes would
1244 be parsed as part of the specifier.
1246 _nonattr: other specifiers not ending with attributes. */
1248 typespec_nonattr:
1249 typespec_reserved_nonattr
1250 | typespec_nonreserved_nonattr
1251 ;
1253 typespec_attr:
1254 typespec_reserved_attr
1255 ;
1257 typespec_reserved_nonattr:
1258 TYPESPEC
1259 { OBJC_NEED_RAW_IDENTIFIER (1);
1260 $$.kind = ctsk_resword;
1261 $$.spec = $1; }
1262 | structsp_nonattr
1263 ;
1265 typespec_reserved_attr:
1266 structsp_attr
1267 ;
1269 typespec_nonreserved_nonattr:
1270 TYPENAME
1271 { /* For a typedef name, record the meaning, not the name.
1272 In case of `foo foo, bar;'. */
1273 $$.kind = ctsk_typedef;
1274 $$.spec = lookup_name ($1); }
1275 @@ifobjc
1276 | CLASSNAME protocolrefs
1277 { $$.kind = ctsk_objc;
1278 $$.spec = objc_get_protocol_qualified_type ($1, $2); }
1279 | TYPENAME non_empty_protocolrefs
1280 { $$.kind = ctsk_objc;
1281 $$.spec = objc_get_protocol_qualified_type ($1, $2); }
1283 /* Make "<SomeProtocol>" equivalent to "id <SomeProtocol>"
1284 - nisse@lysator.liu.se */
1285 | non_empty_protocolrefs
1286 { $$.kind = ctsk_objc;
1287 $$.spec = objc_get_protocol_qualified_type (NULL_TREE, $1); }
1288 @@end_ifobjc
1289 | typeof '(' expr ')'
1290 { skip_evaluation--;
1291 in_typeof--;
1292 if (TREE_CODE ($3.value) == COMPONENT_REF
1293 && DECL_C_BIT_FIELD (TREE_OPERAND ($3.value, 1)))
1294 error ("%<typeof%> applied to a bit-field");
1295 $$.kind = ctsk_typeof;
1296 $$.spec = TREE_TYPE ($3.value);
1297 pop_maybe_used (variably_modified_type_p ($$.spec,
1298 NULL_TREE)); }
1299 | typeof '(' typename ')'
1300 { skip_evaluation--;
1301 in_typeof--;
1302 $$.kind = ctsk_typeof;
1303 $$.spec = groktypename ($3);
1304 pop_maybe_used (variably_modified_type_p ($$.spec,
1305 NULL_TREE)); }
1306 ;
1308 /* typespec_nonreserved_attr does not exist. */
1310 initdecls:
1311 initdcl
1312 | initdecls ',' maybe_resetattrs initdcl
1313 ;
1315 notype_initdecls:
1316 notype_initdcl
1317 | notype_initdecls ',' maybe_resetattrs notype_initdcl
1318 ;
1320 initdcl:
1321 declarator maybeasm maybe_attribute '='
1322 { $<ttype>$ = start_decl ($1, current_declspecs, true,
1323 chainon ($3, all_prefix_attributes));
1324 if (!$<ttype>$)
1325 $<ttype>$ = error_mark_node;
1326 start_init ($<ttype>$, $2, global_bindings_p ()); }
1327 init
1328 /* Note how the declaration of the variable is in effect while its init is parsed! */
1329 { finish_init ();
1330 if ($<ttype>5 != error_mark_node)
1331 {
1332 maybe_warn_string_init (TREE_TYPE ($<ttype>5), $6);
1333 finish_decl ($<ttype>5, $6.value, $2);
1334 }
1335 }
1336 | declarator maybeasm maybe_attribute
1337 { tree d = start_decl ($1, current_declspecs, false,
1338 chainon ($3, all_prefix_attributes));
1339 if (d)
1340 finish_decl (d, NULL_TREE, $2);
1341 }
1342 ;
1344 notype_initdcl:
1345 notype_declarator maybeasm maybe_attribute '='
1346 { $<ttype>$ = start_decl ($1, current_declspecs, true,
1347 chainon ($3, all_prefix_attributes));
1348 if (!$<ttype>$)
1349 $<ttype>$ = error_mark_node;
1350 start_init ($<ttype>$, $2, global_bindings_p ()); }
1351 init
1352 /* Note how the declaration of the variable is in effect while its init is parsed! */
1353 { finish_init ();
1354 if ($<ttype>5 != error_mark_node)
1355 {
1356 maybe_warn_string_init (TREE_TYPE ($<ttype>5), $6);
1357 finish_decl ($<ttype>5, $6.value, $2);
1358 }
1359 }
1360 | notype_declarator maybeasm maybe_attribute
1361 { tree d = start_decl ($1, current_declspecs, false,
1362 chainon ($3, all_prefix_attributes));
1363 if (d)
1364 finish_decl (d, NULL_TREE, $2); }
1365 ;
1366 /* the * rules are dummies to accept the Apollo extended syntax
1367 so that the header files compile. */
1368 maybe_attribute:
1369 /* empty */
1370 { $$ = NULL_TREE; }
1371 | attributes
1372 { $$ = $1; }
1373 ;
1375 attributes:
1376 attribute
1377 { $$ = $1; }
1378 | attributes attribute
1379 { $$ = chainon ($1, $2); }
1380 ;
1382 attribute:
1383 ATTRIBUTE stop_string_translation
1384 '(' '(' attribute_list ')' ')' start_string_translation
1385 { $$ = $5; }
1386 | ATTRIBUTE error start_string_translation
1387 { $$ = NULL_TREE; }
1388 ;
1390 attribute_list:
1391 attrib
1392 { $$ = $1; }
1393 | attribute_list ',' attrib
1394 { $$ = chainon ($1, $3); }
1395 ;
1397 attrib:
1398 /* empty */
1399 { $$ = NULL_TREE; }
1400 | any_word
1401 { $$ = build_tree_list ($1, NULL_TREE); }
1402 | any_word '(' IDENTIFIER ')'
1403 { $$ = build_tree_list ($1, build_tree_list (NULL_TREE, $3)); }
1404 | any_word '(' IDENTIFIER ',' nonnull_exprlist ')'
1405 { $$ = build_tree_list ($1, tree_cons (NULL_TREE, $3, $5)); }
1406 | any_word '(' exprlist ')'
1407 { $$ = build_tree_list ($1, $3); }
1408 ;
1410 /* This still leaves out most reserved keywords,
1411 shouldn't we include them? */
1413 any_word:
1414 identifier
1415 | scspec
1416 | TYPESPEC
1417 | TYPE_QUAL
1418 ;
1420 scspec:
1421 STATIC
1422 | SCSPEC
1423 ;
1424 \f
1425 /* Initializers. `init' is the entry point. */
1427 init:
1428 expr_no_commas
1429 { $$ = $1; }
1430 | '{'
1431 { really_start_incremental_init (NULL_TREE); }
1432 initlist_maybe_comma '}'
1433 { $$ = pop_init_level (0); }
1434 | error
1435 { $$.value = error_mark_node; $$.original_code = ERROR_MARK; }
1436 ;
1438 /* `initlist_maybe_comma' is the guts of an initializer in braces. */
1439 initlist_maybe_comma:
1440 /* empty */
1441 { if (pedantic)
1442 pedwarn ("ISO C forbids empty initializer braces"); }
1443 | initlist1 maybecomma
1444 ;
1446 initlist1:
1447 initelt
1448 | initlist1 ',' initelt
1449 ;
1451 /* `initelt' is a single element of an initializer.
1452 It may use braces. */
1453 initelt:
1454 designator_list '=' initval
1455 { if (pedantic && !flag_isoc99)
1456 pedwarn ("ISO C90 forbids specifying subobject to initialize"); }
1457 | array_designator initval
1458 { if (pedantic)
1459 pedwarn ("obsolete use of designated initializer without %<=%>"); }
1460 | identifier ':'
1461 { set_init_label ($1);
1462 if (pedantic)
1463 pedwarn ("obsolete use of designated initializer with %<:%>"); }
1464 initval
1465 {}
1466 | initval
1467 ;
1469 initval:
1470 '{'
1471 { push_init_level (0); }
1472 initlist_maybe_comma '}'
1473 { process_init_element (pop_init_level (0)); }
1474 | expr_no_commas
1475 { process_init_element ($1); }
1476 | error
1477 ;
1479 designator_list:
1480 designator
1481 | designator_list designator
1482 ;
1484 designator:
1485 '.' identifier
1486 { set_init_label ($2); }
1487 | array_designator
1488 ;
1490 array_designator:
1491 '[' expr_no_commas ELLIPSIS expr_no_commas ']'
1492 { set_init_index ($2.value, $4.value);
1493 if (pedantic)
1494 pedwarn ("ISO C forbids specifying range of elements to initialize"); }
1495 | '[' expr_no_commas ']'
1496 { set_init_index ($2.value, NULL_TREE); }
1497 ;
1498 \f
1499 nested_function:
1500 declarator
1501 { if (pedantic)
1502 pedwarn ("ISO C forbids nested functions");
1504 push_function_context ();
1505 if (!start_function (current_declspecs, $1,
1506 all_prefix_attributes))
1507 {
1508 pop_function_context ();
1509 YYERROR1;
1510 }
1511 }
1512 old_style_parm_decls save_location
1513 { tree decl = current_function_decl;
1514 DECL_SOURCE_LOCATION (decl) = $4;
1515 store_parm_decls (); }
1516 /* This used to use compstmt_or_error. That caused a bug with
1517 input `f(g) int g {}', where the use of YYERROR1 above caused
1518 an error which then was handled by compstmt_or_error. There
1519 followed a repeated execution of that same rule, which called
1520 YYERROR1 again, and so on. */
1521 compstmt
1522 { tree decl = current_function_decl;
1523 add_stmt ($6);
1524 finish_function ();
1525 pop_function_context ();
1526 add_stmt (build_stmt (DECL_EXPR, decl)); }
1527 ;
1529 notype_nested_function:
1530 notype_declarator
1531 { if (pedantic)
1532 pedwarn ("ISO C forbids nested functions");
1534 push_function_context ();
1535 if (!start_function (current_declspecs, $1,
1536 all_prefix_attributes))
1537 {
1538 pop_function_context ();
1539 YYERROR1;
1540 }
1541 }
1542 old_style_parm_decls save_location
1543 { tree decl = current_function_decl;
1544 DECL_SOURCE_LOCATION (decl) = $4;
1545 store_parm_decls (); }
1546 /* This used to use compstmt_or_error. That caused a bug with
1547 input `f(g) int g {}', where the use of YYERROR1 above caused
1548 an error which then was handled by compstmt_or_error. There
1549 followed a repeated execution of that same rule, which called
1550 YYERROR1 again, and so on. */
1551 compstmt
1552 { tree decl = current_function_decl;
1553 add_stmt ($6);
1554 finish_function ();
1555 pop_function_context ();
1556 add_stmt (build_stmt (DECL_EXPR, decl)); }
1557 ;
1559 /* Any kind of declarator (thus, all declarators allowed
1560 after an explicit typespec). */
1562 declarator:
1563 after_type_declarator
1564 | notype_declarator
1565 ;
1567 /* A declarator that is allowed only after an explicit typespec. */
1569 after_type_declarator:
1570 '(' maybe_attribute after_type_declarator ')'
1571 { $$ = $2 ? build_attrs_declarator ($2, $3) : $3; }
1572 | after_type_declarator '(' parmlist_or_identifiers %prec '.'
1573 { $$ = build_function_declarator ($3, $1); }
1574 | after_type_declarator array_declarator %prec '.'
1575 { $$ = set_array_declarator_inner ($2, $1, false); }
1576 | '*' maybe_type_quals_attrs after_type_declarator %prec UNARY
1577 { $$ = make_pointer_declarator ($2, $3); }
1578 | TYPENAME
1579 { $$ = build_id_declarator ($1); }
1580 ;
1582 /* Kinds of declarator that can appear in a parameter list
1583 in addition to notype_declarator. This is like after_type_declarator
1584 but does not allow a typedef name in parentheses as an identifier
1585 (because it would conflict with a function with that typedef as arg). */
1586 parm_declarator:
1587 parm_declarator_starttypename
1588 | parm_declarator_nostarttypename
1589 ;
1591 parm_declarator_starttypename:
1592 parm_declarator_starttypename '(' parmlist_or_identifiers %prec '.'
1593 { $$ = build_function_declarator ($3, $1); }
1594 | parm_declarator_starttypename array_declarator %prec '.'
1595 { $$ = set_array_declarator_inner ($2, $1, false); }
1596 | TYPENAME
1597 { $$ = build_id_declarator ($1); }
1598 ;
1600 parm_declarator_nostarttypename:
1601 parm_declarator_nostarttypename '(' parmlist_or_identifiers %prec '.'
1602 { $$ = build_function_declarator ($3, $1); }
1603 | parm_declarator_nostarttypename array_declarator %prec '.'
1604 { $$ = set_array_declarator_inner ($2, $1, false); }
1605 | '*' maybe_type_quals_attrs parm_declarator_starttypename %prec UNARY
1606 { $$ = make_pointer_declarator ($2, $3); }
1607 | '*' maybe_type_quals_attrs parm_declarator_nostarttypename %prec UNARY
1608 { $$ = make_pointer_declarator ($2, $3); }
1609 | '(' maybe_attribute parm_declarator_nostarttypename ')'
1610 { $$ = $2 ? build_attrs_declarator ($2, $3) : $3; }
1611 ;
1613 /* A declarator allowed whether or not there has been
1614 an explicit typespec. These cannot redeclare a typedef-name. */
1616 notype_declarator:
1617 notype_declarator '(' parmlist_or_identifiers %prec '.'
1618 { $$ = build_function_declarator ($3, $1); }
1619 | '(' maybe_attribute notype_declarator ')'
1620 { $$ = $2 ? build_attrs_declarator ($2, $3) : $3; }
1621 | '*' maybe_type_quals_attrs notype_declarator %prec UNARY
1622 { $$ = make_pointer_declarator ($2, $3); }
1623 | notype_declarator array_declarator %prec '.'
1624 { $$ = set_array_declarator_inner ($2, $1, false); }
1625 | IDENTIFIER
1626 { $$ = build_id_declarator ($1); }
1627 ;
1629 struct_head:
1630 STRUCT
1631 { $$ = NULL_TREE; }
1632 | STRUCT attributes
1633 { $$ = $2; }
1634 ;
1636 union_head:
1637 UNION
1638 { $$ = NULL_TREE; }
1639 | UNION attributes
1640 { $$ = $2; }
1641 ;
1643 enum_head:
1644 ENUM
1645 { $$ = NULL_TREE; }
1646 | ENUM attributes
1647 { $$ = $2; }
1648 ;
1650 /* structsp_attr: struct/union/enum specifiers that either
1651 end with attributes, or are such that any following attributes would
1652 be parsed as part of the struct/union/enum specifier.
1654 structsp_nonattr: other struct/union/enum specifiers. */
1656 structsp_attr:
1657 struct_head identifier '{'
1658 { $<ttype>$ = start_struct (RECORD_TYPE, $2);
1659 /* Start scope of tag before parsing components. */
1660 }
1661 component_decl_list '}' maybe_attribute
1662 { $$.spec = finish_struct ($<ttype>4, nreverse ($5),
1663 chainon ($1, $7));
1664 $$.kind = ctsk_tagdef; }
1665 | struct_head '{' component_decl_list '}' maybe_attribute
1666 { $$.spec = finish_struct (start_struct (RECORD_TYPE,
1667 NULL_TREE),
1668 nreverse ($3), chainon ($1, $5));
1669 $$.kind = ctsk_tagdef;
1670 }
1671 | union_head identifier '{'
1672 { $<ttype>$ = start_struct (UNION_TYPE, $2); }
1673 component_decl_list '}' maybe_attribute
1674 { $$.spec = finish_struct ($<ttype>4, nreverse ($5),
1675 chainon ($1, $7));
1676 $$.kind = ctsk_tagdef; }
1677 | union_head '{' component_decl_list '}' maybe_attribute
1678 { $$.spec = finish_struct (start_struct (UNION_TYPE,
1679 NULL_TREE),
1680 nreverse ($3), chainon ($1, $5));
1681 $$.kind = ctsk_tagdef;
1682 }
1683 | enum_head identifier '{'
1684 { $<ttype>$ = start_enum ($2); }
1685 enumlist maybecomma_warn '}' maybe_attribute
1686 { $$.spec = finish_enum ($<ttype>4, nreverse ($5),
1687 chainon ($1, $8));
1688 $$.kind = ctsk_tagdef; }
1689 | enum_head '{'
1690 { $<ttype>$ = start_enum (NULL_TREE); }
1691 enumlist maybecomma_warn '}' maybe_attribute
1692 { $$.spec = finish_enum ($<ttype>3, nreverse ($4),
1693 chainon ($1, $7));
1694 $$.kind = ctsk_tagdef; }
1695 ;
1697 structsp_nonattr:
1698 struct_head identifier
1699 { $$ = parser_xref_tag (RECORD_TYPE, $2); }
1700 | union_head identifier
1701 { $$ = parser_xref_tag (UNION_TYPE, $2); }
1702 | enum_head identifier
1703 { $$ = parser_xref_tag (ENUMERAL_TYPE, $2);
1704 /* In ISO C, enumerated types can be referred to
1705 only if already defined. */
1706 if (pedantic && !COMPLETE_TYPE_P ($$.spec))
1707 pedwarn ("ISO C forbids forward references to %<enum%> types"); }
1708 ;
1710 maybecomma:
1711 /* empty */
1712 | ','
1713 ;
1715 maybecomma_warn:
1716 /* empty */
1717 | ','
1718 { if (pedantic && !flag_isoc99)
1719 pedwarn ("comma at end of enumerator list"); }
1720 ;
1722 /* We chain the components in reverse order. They are put in forward
1723 order in structsp_attr.
1725 Note that component_declarator returns single decls, so components
1726 and components_notype can use TREE_CHAIN directly, wheras components
1727 and components_notype return lists (of comma separated decls), so
1728 component_decl_list and component_decl_list2 must use chainon.
1730 The theory behind all this is that there will be more semicolon
1731 separated fields than comma separated fields, and so we'll be
1732 minimizing the number of node traversals required by chainon. */
1734 component_decl_list:
1735 component_decl_list2
1736 { $$ = $1; }
1737 | component_decl_list2 component_decl
1738 { $$ = chainon ($2, $1);
1739 pedwarn ("no semicolon at end of struct or union"); }
1740 ;
1742 component_decl_list2: /* empty */
1743 { $$ = NULL_TREE; }
1744 | component_decl_list2 component_decl ';'
1745 { $$ = chainon ($2, $1); }
1746 | component_decl_list2 ';'
1747 { if (pedantic)
1748 pedwarn ("extra semicolon in struct or union specified"); }
1749 @@ifobjc
1750 /* foo(sizeof(struct{ @defs(ClassName)})); */
1751 | AT_DEFS '(' CLASSNAME ')'
1752 { $$ = nreverse (objc_get_class_ivars ($3)); }
1753 @@end_ifobjc
1754 ;
1756 component_decl:
1757 declspecs_nosc_ts setspecs components
1758 { $$ = $3;
1759 POP_DECLSPEC_STACK; }
1760 | declspecs_nosc_ts setspecs
1761 {
1762 /* Support for unnamed structs or unions as members of
1763 structs or unions (which is [a] useful and [b] supports
1764 MS P-SDK). */
1765 $$ = grokfield (build_id_declarator (NULL_TREE),
1766 current_declspecs, NULL_TREE);
1767 POP_DECLSPEC_STACK; }
1768 | declspecs_nosc_nots setspecs components_notype
1769 { $$ = $3;
1770 POP_DECLSPEC_STACK; }
1771 | declspecs_nosc_nots
1772 { if (pedantic)
1773 pedwarn ("ISO C forbids member declarations with no members");
1774 shadow_tag_warned (finish_declspecs ($1), pedantic);
1775 $$ = NULL_TREE; }
1776 | error
1777 { $$ = NULL_TREE; }
1778 | extension component_decl
1779 { $$ = $2;
1780 RESTORE_EXT_FLAGS ($1); }
1781 ;
1783 components:
1784 component_declarator
1785 | components ',' maybe_resetattrs component_declarator
1786 { TREE_CHAIN ($4) = $1; $$ = $4; }
1787 ;
1789 components_notype:
1790 component_notype_declarator
1791 | components_notype ',' maybe_resetattrs component_notype_declarator
1792 { TREE_CHAIN ($4) = $1; $$ = $4; }
1793 ;
1795 component_declarator:
1796 declarator maybe_attribute
1797 { $$ = grokfield ($1, current_declspecs, NULL_TREE);
1798 decl_attributes (&$$,
1799 chainon ($2, all_prefix_attributes), 0); }
1800 | declarator ':' expr_no_commas maybe_attribute
1801 { $$ = grokfield ($1, current_declspecs, $3.value);
1802 decl_attributes (&$$,
1803 chainon ($4, all_prefix_attributes), 0); }
1804 | ':' expr_no_commas maybe_attribute
1805 { $$ = grokfield (build_id_declarator (NULL_TREE),
1806 current_declspecs, $2.value);
1807 decl_attributes (&$$,
1808 chainon ($3, all_prefix_attributes), 0); }
1809 ;
1811 component_notype_declarator:
1812 notype_declarator maybe_attribute
1813 { $$ = grokfield ($1, current_declspecs, NULL_TREE);
1814 decl_attributes (&$$,
1815 chainon ($2, all_prefix_attributes), 0); }
1816 | notype_declarator ':' expr_no_commas maybe_attribute
1817 { $$ = grokfield ($1, current_declspecs, $3.value);
1818 decl_attributes (&$$,
1819 chainon ($4, all_prefix_attributes), 0); }
1820 | ':' expr_no_commas maybe_attribute
1821 { $$ = grokfield (build_id_declarator (NULL_TREE),
1822 current_declspecs, $2.value);
1823 decl_attributes (&$$,
1824 chainon ($3, all_prefix_attributes), 0); }
1825 ;
1827 /* We chain the enumerators in reverse order.
1828 They are put in forward order in structsp_attr. */
1830 enumlist:
1831 enumerator
1832 | enumlist ',' enumerator
1833 { if ($1 == error_mark_node)
1834 $$ = $1;
1835 else
1836 TREE_CHAIN ($3) = $1, $$ = $3; }
1837 | error
1838 { $$ = error_mark_node; }
1839 ;
1842 enumerator:
1843 identifier
1844 { $$ = build_enumerator ($1, NULL_TREE); }
1845 | identifier '=' expr_no_commas
1846 { $$ = build_enumerator ($1, $3.value); }
1847 ;
1849 typename:
1850 declspecs_nosc
1851 { pending_xref_error ();
1852 $<dsptype>$ = finish_declspecs ($1); }
1853 absdcl
1854 { $$ = XOBNEW (&parser_obstack, struct c_type_name);
1855 $$->specs = $<dsptype>2;
1856 $$->declarator = $3; }
1857 ;
1859 absdcl: /* an absolute declarator */
1860 /* empty */
1861 { $$ = build_id_declarator (NULL_TREE); }
1862 | absdcl1
1863 ;
1865 absdcl_maybe_attribute: /* absdcl maybe_attribute, but not just attributes */
1866 /* empty */
1867 { $$ = build_c_parm (current_declspecs, all_prefix_attributes,
1868 build_id_declarator (NULL_TREE)); }
1869 | absdcl1
1870 { $$ = build_c_parm (current_declspecs, all_prefix_attributes,
1871 $1); }
1872 | absdcl1_noea attributes
1873 { $$ = build_c_parm (current_declspecs,
1874 chainon ($2, all_prefix_attributes),
1875 $1); }
1876 ;
1878 absdcl1: /* a nonempty absolute declarator */
1879 absdcl1_ea
1880 | absdcl1_noea
1881 ;
1883 absdcl1_noea:
1884 direct_absdcl1
1885 | '*' maybe_type_quals_attrs absdcl1_noea
1886 { $$ = make_pointer_declarator ($2, $3); }
1887 ;
1889 absdcl1_ea:
1890 '*' maybe_type_quals_attrs
1891 { $$ = make_pointer_declarator
1892 ($2, build_id_declarator (NULL_TREE)); }
1893 | '*' maybe_type_quals_attrs absdcl1_ea
1894 { $$ = make_pointer_declarator ($2, $3); }
1895 ;
1897 direct_absdcl1:
1898 '(' maybe_attribute absdcl1 ')'
1899 { $$ = $2 ? build_attrs_declarator ($2, $3) : $3; }
1900 | direct_absdcl1 '(' parmlist
1901 { $$ = build_function_declarator ($3, $1); }
1902 | direct_absdcl1 array_declarator
1903 { $$ = set_array_declarator_inner ($2, $1, true); }
1904 | '(' parmlist
1905 { $$ = build_function_declarator
1906 ($2, build_id_declarator (NULL_TREE)); }
1907 | array_declarator
1908 { $$ = set_array_declarator_inner
1909 ($1, build_id_declarator (NULL_TREE), true); }
1910 ;
1912 /* The [...] part of a declarator for an array type. */
1914 array_declarator:
1915 '[' maybe_type_quals_attrs expr_no_commas ']'
1916 { $$ = build_array_declarator ($3.value, $2, false, false); }
1917 | '[' maybe_type_quals_attrs ']'
1918 { $$ = build_array_declarator (NULL_TREE, $2, false, false); }
1919 | '[' maybe_type_quals_attrs '*' ']'
1920 { $$ = build_array_declarator (NULL_TREE, $2, false, true); }
1921 | '[' STATIC maybe_type_quals_attrs expr_no_commas ']'
1922 { $$ = build_array_declarator ($4.value, $3, true, false); }
1923 /* declspecs_nosc_nots is a synonym for type_quals_attrs. */
1924 | '[' declspecs_nosc_nots STATIC expr_no_commas ']'
1925 { $$ = build_array_declarator ($4.value, $2, true, false); }
1926 ;
1928 /* A nonempty series of declarations and statements (possibly followed by
1929 some labels) that can form the body of a compound statement.
1930 NOTE: we don't allow labels on declarations; this might seem like a
1931 natural extension, but there would be a conflict between attributes
1932 on the label and prefix attributes on the declaration. */
1934 stmts_and_decls:
1935 lineno_stmt_decl_or_labels_ending_stmt
1936 | lineno_stmt_decl_or_labels_ending_decl
1937 | lineno_stmt_decl_or_labels_ending_label
1938 {
1939 error ("label at end of compound statement");
1940 }
1941 | lineno_stmt_decl_or_labels_ending_error
1942 ;
1944 lineno_stmt_decl_or_labels_ending_stmt:
1945 lineno_stmt
1946 | lineno_stmt_decl_or_labels_ending_stmt lineno_stmt
1947 | lineno_stmt_decl_or_labels_ending_decl lineno_stmt
1948 | lineno_stmt_decl_or_labels_ending_label lineno_stmt
1949 | lineno_stmt_decl_or_labels_ending_error lineno_stmt
1950 ;
1952 lineno_stmt_decl_or_labels_ending_decl:
1953 lineno_decl
1954 | lineno_stmt_decl_or_labels_ending_stmt lineno_decl
1955 {
1956 if ((pedantic && !flag_isoc99)
1957 || warn_declaration_after_statement)
1958 pedwarn_c90 ("ISO C90 forbids mixed declarations and code");
1959 }
1960 | lineno_stmt_decl_or_labels_ending_decl lineno_decl
1961 | lineno_stmt_decl_or_labels_ending_error lineno_decl
1962 ;
1964 lineno_stmt_decl_or_labels_ending_label:
1965 lineno_label
1966 | lineno_stmt_decl_or_labels_ending_stmt lineno_label
1967 | lineno_stmt_decl_or_labels_ending_decl lineno_label
1968 | lineno_stmt_decl_or_labels_ending_label lineno_label
1969 | lineno_stmt_decl_or_labels_ending_error lineno_label
1970 ;
1972 lineno_stmt_decl_or_labels_ending_error:
1973 errstmt
1974 | lineno_stmt_decl_or_labels errstmt
1975 ;
1977 lineno_stmt_decl_or_labels:
1978 lineno_stmt_decl_or_labels_ending_stmt
1979 | lineno_stmt_decl_or_labels_ending_decl
1980 | lineno_stmt_decl_or_labels_ending_label
1981 | lineno_stmt_decl_or_labels_ending_error
1982 ;
1984 errstmt: error ';'
1985 ;
1987 /* Start and end blocks created for the new scopes of C99. */
1988 c99_block_start: /* empty */
1989 { $$ = c_begin_compound_stmt (flag_isoc99); }
1990 ;
1992 /* Read zero or more forward-declarations for labels
1993 that nested functions can jump to. */
1994 maybe_label_decls:
1995 /* empty */
1996 | label_decls
1997 { if (pedantic)
1998 pedwarn ("ISO C forbids label declarations"); }
1999 ;
2001 label_decls:
2002 label_decl
2003 | label_decls label_decl
2004 ;
2006 label_decl:
2007 LABEL identifiers_or_typenames ';'
2008 { tree link;
2009 for (link = $2; link; link = TREE_CHAIN (link))
2010 {
2011 tree label = declare_label (TREE_VALUE (link));
2012 C_DECLARED_LABEL_FLAG (label) = 1;
2013 add_stmt (build_stmt (DECL_EXPR, label));
2014 }
2015 }
2016 ;
2018 /* This is the body of a function definition.
2019 It causes syntax errors to ignore to the next openbrace. */
2020 compstmt_or_error:
2021 compstmt
2022 { add_stmt ($1); }
2023 | error compstmt
2024 ;
2026 compstmt_start: '{' { $$ = c_begin_compound_stmt (true); }
2027 ;
2029 compstmt_nostart: '}'
2030 | maybe_label_decls compstmt_contents_nonempty '}'
2031 ;
2033 compstmt_contents_nonempty:
2034 stmts_and_decls
2035 | error
2036 ;
2038 compstmt_primary_start:
2039 '(' '{'
2040 { if (cur_stmt_list == NULL)
2041 {
2042 error ("braced-group within expression allowed "
2043 "only inside a function");
2044 YYERROR;
2045 }
2046 $$ = c_begin_stmt_expr ();
2047 }
2048 ;
2050 compstmt: compstmt_start compstmt_nostart
2051 { $$ = c_end_compound_stmt ($1, true); }
2052 ;
2054 /* The forced readahead in here is because we might be at the end of a
2055 line, and the line and file won't be bumped until yylex absorbs the
2056 first token on the next line. */
2058 save_location:
2059 { if (yychar == YYEMPTY)
2060 yychar = YYLEX;
2061 $$ = input_location; }
2062 ;
2064 lineno_labels:
2065 /* empty */
2066 | lineno_labels lineno_label
2067 ;
2069 /* A labeled statement. In C99 it also generates an implicit block. */
2070 c99_block_lineno_labeled_stmt:
2071 c99_block_start lineno_labels lineno_stmt
2072 { $$ = c_end_compound_stmt ($1, flag_isoc99); }
2073 ;
2075 lineno_stmt:
2076 save_location stmt
2077 {
2078 /* Two cases cannot and do not have line numbers associated:
2079 If stmt is degenerate, such as "2;", then stmt is an
2080 INTEGER_CST, which cannot hold line numbers. But that's
2081 ok because the statement will either be changed to a
2082 MODIFY_EXPR during gimplification of the statement expr,
2083 or discarded. If stmt was compound, but without new
2084 variables, we will have skipped the creation of a BIND
2085 and will have a bare STATEMENT_LIST. But that's ok
2086 because (recursively) all of the component statments
2087 should already have line numbers assigned. */
2088 if ($2 && EXPR_P ($2))
2089 SET_EXPR_LOCATION ($2, $1);
2090 }
2091 ;
2093 lineno_label:
2094 save_location label
2095 { if ($2) SET_EXPR_LOCATION ($2, $1); }
2096 ;
2098 condition: save_location expr
2099 { $$ = lang_hooks.truthvalue_conversion ($2.value);
2100 if (EXPR_P ($$))
2101 SET_EXPR_LOCATION ($$, $1); }
2102 ;
2104 /* Implement -Wparenthesis by special casing IF statement directly nested
2105 within IF statement. This requires some amount of duplication of the
2106 productions under c99_block_lineno_labeled_stmt in order to work out.
2107 But it's still likely more maintainable than lots of state outside the
2108 parser... */
2110 if_statement_1:
2111 c99_block_start lineno_labels if_statement
2112 { $$ = c_end_compound_stmt ($1, flag_isoc99); }
2113 ;
2115 if_statement_2:
2116 c99_block_start lineno_labels ';'
2117 { if (extra_warnings)
2118 add_stmt (build (NOP_EXPR, NULL_TREE, NULL_TREE));
2119 $$ = c_end_compound_stmt ($1, flag_isoc99); }
2120 | c99_block_lineno_labeled_stmt
2121 ;
2123 if_statement:
2124 IF c99_block_start save_location '(' condition ')'
2125 if_statement_1 ELSE if_statement_2
2126 { c_finish_if_stmt ($3, $5, $7, $9, true);
2127 add_stmt (c_end_compound_stmt ($2, flag_isoc99)); }
2128 | IF c99_block_start save_location '(' condition ')'
2129 if_statement_2 ELSE if_statement_2
2130 { c_finish_if_stmt ($3, $5, $7, $9, false);
2131 add_stmt (c_end_compound_stmt ($2, flag_isoc99)); }
2132 | IF c99_block_start save_location '(' condition ')'
2133 if_statement_1 %prec IF
2134 { c_finish_if_stmt ($3, $5, $7, NULL, true);
2135 add_stmt (c_end_compound_stmt ($2, flag_isoc99)); }
2136 | IF c99_block_start save_location '(' condition ')'
2137 if_statement_2 %prec IF
2138 { c_finish_if_stmt ($3, $5, $7, NULL, false);
2139 add_stmt (c_end_compound_stmt ($2, flag_isoc99)); }
2140 ;
2142 start_break: /* empty */
2143 { $$ = c_break_label; c_break_label = NULL; }
2144 ;
2146 start_continue: /* empty */
2147 { $$ = c_cont_label; c_cont_label = NULL; }
2148 ;
2150 while_statement:
2151 WHILE c99_block_start save_location '(' condition ')'
2152 start_break start_continue c99_block_lineno_labeled_stmt
2153 { c_finish_loop ($3, $5, NULL, $9, c_break_label,
2154 c_cont_label, true);
2155 add_stmt (c_end_compound_stmt ($2, flag_isoc99));
2156 c_break_label = $7; c_cont_label = $8; }
2157 ;
2159 do_statement:
2160 DO c99_block_start save_location start_break start_continue
2161 c99_block_lineno_labeled_stmt WHILE
2162 { $<ttype>$ = c_break_label; c_break_label = $4; }
2163 { $<ttype>$ = c_cont_label; c_cont_label = $5; }
2164 '(' condition ')' ';'
2165 { c_finish_loop ($3, $11, NULL, $6, $<ttype>8,
2166 $<ttype>9, false);
2167 add_stmt (c_end_compound_stmt ($2, flag_isoc99)); }
2168 ;
2170 xexpr:
2171 /* empty */
2172 { $$ = NULL_TREE; }
2173 | expr
2174 { $$ = $1.value; }
2175 ;
2177 for_init_stmt:
2178 xexpr ';'
2179 { c_finish_expr_stmt ($1); }
2180 | decl
2181 { check_for_loop_decls (); }
2182 ;
2184 for_cond_expr: save_location xexpr
2185 { if ($2)
2186 {
2187 $$ = lang_hooks.truthvalue_conversion ($2);
2188 if (EXPR_P ($$))
2189 SET_EXPR_LOCATION ($$, $1);
2190 }
2191 else
2192 $$ = NULL;
2193 }
2194 ;
2196 for_incr_expr: xexpr
2197 { $$ = c_process_expr_stmt ($1); }
2198 ;
2200 for_statement:
2201 FOR c99_block_start '(' for_init_stmt
2202 save_location for_cond_expr ';' for_incr_expr ')'
2203 start_break start_continue c99_block_lineno_labeled_stmt
2204 { c_finish_loop ($5, $6, $8, $12, c_break_label,
2205 c_cont_label, true);
2206 add_stmt (c_end_compound_stmt ($2, flag_isoc99));
2207 c_break_label = $10; c_cont_label = $11; }
2208 ;
2210 switch_statement:
2211 SWITCH c99_block_start '(' expr ')'
2212 { $<ttype>$ = c_start_case ($4.value); }
2213 start_break c99_block_lineno_labeled_stmt
2214 { c_finish_case ($8);
2215 if (c_break_label)
2216 add_stmt (build (LABEL_EXPR, void_type_node,
2217 c_break_label));
2218 c_break_label = $7;
2219 add_stmt (c_end_compound_stmt ($2, flag_isoc99)); }
2220 ;
2222 /* Parse a single real statement, not including any labels or compounds. */
2223 stmt_nocomp:
2224 expr ';'
2225 { $$ = c_finish_expr_stmt ($1.value); }
2226 | if_statement
2227 { $$ = NULL_TREE; }
2228 | while_statement
2229 { $$ = NULL_TREE; }
2230 | do_statement
2231 { $$ = NULL_TREE; }
2232 | for_statement
2233 { $$ = NULL_TREE; }
2234 | switch_statement
2235 { $$ = NULL_TREE; }
2236 | BREAK ';'
2237 { $$ = c_finish_bc_stmt (&c_break_label, true); }
2238 | CONTINUE ';'
2239 { $$ = c_finish_bc_stmt (&c_cont_label, false); }
2240 | RETURN ';'
2241 { $$ = c_finish_return (NULL_TREE); }
2242 | RETURN expr ';'
2243 { $$ = c_finish_return ($2.value); }
2244 | asm_stmt
2245 | GOTO identifier ';'
2246 { $$ = c_finish_goto_label ($2); }
2247 | GOTO '*' expr ';'
2248 { $$ = c_finish_goto_ptr ($3.value); }
2249 | ';'
2250 { $$ = NULL_TREE; }
2251 @@ifobjc
2252 | AT_THROW expr ';'
2253 { $$ = objc_build_throw_stmt ($2.value); }
2254 | AT_THROW ';'
2255 { $$ = objc_build_throw_stmt (NULL_TREE); }
2256 | objc_try_catch_stmt
2257 { $$ = NULL_TREE; }
2258 | AT_SYNCHRONIZED save_location '(' expr ')' compstmt
2259 { objc_build_synchronized ($2, $4.value, $6); $$ = NULL_TREE; }
2260 ;
2262 objc_catch_prefix:
2263 AT_CATCH '(' parm ')'
2264 { objc_begin_catch_clause (grokparm ($3)); }
2265 ;
2267 objc_catch_clause:
2268 objc_catch_prefix '{' compstmt_nostart
2269 { objc_finish_catch_clause (); }
2270 | objc_catch_prefix '{' error '}'
2271 { objc_finish_catch_clause (); }
2272 ;
2274 objc_opt_catch_list:
2275 /* empty */
2276 | objc_opt_catch_list objc_catch_clause
2277 ;
2279 objc_try_catch_clause:
2280 AT_TRY save_location compstmt
2281 { objc_begin_try_stmt ($2, $3); }
2282 objc_opt_catch_list
2283 ;
2285 objc_finally_clause:
2286 AT_FINALLY save_location compstmt
2287 { objc_build_finally_clause ($2, $3); }
2288 ;
2290 objc_try_catch_stmt:
2291 objc_try_catch_clause
2292 { objc_finish_try_stmt (); }
2293 | objc_try_catch_clause objc_finally_clause
2294 { objc_finish_try_stmt (); }
2295 @@end_ifobjc
2296 ;
2298 /* Parse a single or compound real statement, not including any labels. */
2299 stmt:
2300 compstmt
2301 { add_stmt ($1); $$ = NULL_TREE; }
2302 | stmt_nocomp
2303 ;
2305 /* Any kind of label, including jump labels and case labels.
2306 ANSI C accepts labels only before statements, but we allow them
2307 also at the end of a compound statement. */
2309 label: CASE expr_no_commas ':'
2310 { $$ = do_case ($2.value, NULL_TREE); }
2311 | CASE expr_no_commas ELLIPSIS expr_no_commas ':'
2312 { $$ = do_case ($2.value, $4.value); }
2313 | DEFAULT ':'
2314 { $$ = do_case (NULL_TREE, NULL_TREE); }
2315 | identifier save_location ':' maybe_attribute
2316 { tree label = define_label ($2, $1);
2317 if (label)
2318 {
2319 decl_attributes (&label, $4, 0);
2320 $$ = add_stmt (build_stmt (LABEL_EXPR, label));
2321 }
2322 else
2323 $$ = NULL_TREE;
2324 }
2325 ;
2327 /* Asm expressions and statements */
2329 /* simple_asm_expr is used in restricted contexts, where a full
2330 expression with inputs and outputs does not make sense. */
2331 simple_asm_expr:
2332 ASM_KEYWORD stop_string_translation
2333 '(' asm_string ')' start_string_translation
2334 { $$ = $4; }
2335 ;
2337 /* maybeasm: used for assembly names for declarations */
2338 maybeasm:
2339 /* empty */
2340 { $$ = NULL_TREE; }
2341 | simple_asm_expr
2342 ;
2344 /* asmdef: asm() outside a function body. */
2345 asmdef:
2346 simple_asm_expr ';'
2347 { assemble_asm ($1); }
2348 | ASM_KEYWORD error start_string_translation ';'
2349 {}
2350 ;
2352 /* Full-blown asm statement with inputs, outputs, clobbers, and
2353 volatile tag allowed. */
2354 asm_stmt:
2355 ASM_KEYWORD maybe_volatile stop_string_translation
2356 '(' asm_argument ')' start_string_translation ';'
2357 { $$ = build_asm_stmt ($2, $5); }
2358 ;
2360 asm_argument:
2361 /* no operands */
2362 asm_string
2363 { $$ = build_asm_expr ($1, 0, 0, 0, true); }
2364 /* output operands */
2365 | asm_string ':' asm_operands
2366 { $$ = build_asm_expr ($1, $3, 0, 0, false); }
2367 /* output and input operands */
2368 | asm_string ':' asm_operands ':' asm_operands
2369 { $$ = build_asm_expr ($1, $3, $5, 0, false); }
2370 /* output and input operands and clobbers */
2371 | asm_string ':' asm_operands ':' asm_operands ':' asm_clobbers
2372 { $$ = build_asm_expr ($1, $3, $5, $7, false); }
2373 ;
2375 /* Either 'volatile' or nothing. First thing in an `asm' statement. */
2377 maybe_volatile:
2378 /* empty */
2379 { $$ = 0; }
2380 | TYPE_QUAL
2381 { if ($1 != ridpointers[RID_VOLATILE])
2382 {
2383 warning ("%E qualifier ignored on asm", $1);
2384 $$ = 0;
2385 }
2386 else
2387 $$ = $1;
2388 }
2389 ;
2391 /* These are the operands other than the first string and colon
2392 in asm ("addextend %2,%1": "=dm" (x), "0" (y), "g" (*x)) */
2393 asm_operands: /* empty */
2394 { $$ = NULL_TREE; }
2395 | nonnull_asm_operands
2396 ;
2398 nonnull_asm_operands:
2399 asm_operand
2400 | nonnull_asm_operands ',' asm_operand
2401 { $$ = chainon ($1, $3); }
2402 ;
2404 asm_operand:
2405 asm_string start_string_translation '(' expr ')'
2406 stop_string_translation
2407 { $$ = build_tree_list (build_tree_list (NULL_TREE, $1),
2408 $4.value); }
2409 | '[' identifier ']' asm_string start_string_translation
2410 '(' expr ')' stop_string_translation
2411 { $2 = build_string (IDENTIFIER_LENGTH ($2),
2412 IDENTIFIER_POINTER ($2));
2413 $$ = build_tree_list (build_tree_list ($2, $4), $7.value); }
2414 ;
2416 asm_clobbers:
2417 asm_string
2418 { $$ = tree_cons (NULL_TREE, $1, NULL_TREE); }
2419 | asm_clobbers ',' asm_string
2420 { $$ = tree_cons (NULL_TREE, $3, $1); }
2421 ;
2423 /* Strings in 'asm' must be narrow strings. */
2424 asm_string:
2425 STRING
2426 { if (TYPE_MAIN_VARIANT (TREE_TYPE (TREE_TYPE ($1)))
2427 != char_type_node)
2428 {
2429 error ("wide string literal in %<asm%>");
2430 $$ = build_string (1, "");
2431 }
2432 else
2433 $$ = $1; }
2434 ;
2436 stop_string_translation:
2437 { c_lex_string_translate = 0; }
2438 ;
2440 start_string_translation:
2441 { c_lex_string_translate = 1; }
2442 ;
2444 \f
2445 /* This is what appears inside the parens in a function declarator.
2446 Its value is a list of ..._TYPE nodes. Attributes must appear here
2447 to avoid a conflict with their appearance after an open parenthesis
2448 in an abstract declarator, as in
2449 "void bar (int (__attribute__((__mode__(SI))) int foo));". */
2450 parmlist:
2451 maybe_attribute
2452 { push_scope ();
2453 declare_parm_level (); }
2454 parmlist_1
2455 { $$ = $3;
2456 pop_scope (); }
2457 ;
2459 parmlist_1:
2460 parmlist_2 ')'
2461 | parms ';'
2462 { mark_forward_parm_decls (); }
2463 maybe_attribute
2464 { /* Dummy action so attributes are in known place
2465 on parser stack. */ }
2466 parmlist_1
2467 { $$ = $6; }
2468 | error ')'
2469 { $$ = XOBNEW (&parser_obstack, struct c_arg_info);
2470 $$->parms = 0;
2471 $$->tags = 0;
2472 $$->types = 0;
2473 $$->others = 0; }
2474 ;
2476 /* This is what appears inside the parens in a function declarator.
2477 Its value is represented in the format that grokdeclarator expects. */
2478 parmlist_2: /* empty */
2479 { $$ = XOBNEW (&parser_obstack, struct c_arg_info);
2480 $$->parms = 0;
2481 $$->tags = 0;
2482 $$->types = 0;
2483 $$->others = 0; }
2484 | ELLIPSIS
2485 { $$ = XOBNEW (&parser_obstack, struct c_arg_info);
2486 $$->parms = 0;
2487 $$->tags = 0;
2488 $$->others = 0;
2489 /* Suppress -Wold-style-definition for this case. */
2490 $$->types = error_mark_node;
2491 error ("ISO C requires a named argument before %<...%>");
2492 }
2493 | parms
2494 { $$ = get_parm_info (/*ellipsis=*/false); }
2495 | parms ',' ELLIPSIS
2496 { $$ = get_parm_info (/*ellipsis=*/true); }
2497 ;
2499 parms:
2500 firstparm
2501 { push_parm_decl ($1); }
2502 | parms ',' parm
2503 { push_parm_decl ($3); }
2504 ;
2506 /* A single parameter declaration or parameter type name,
2507 as found in a parmlist. */
2508 parm:
2509 declspecs_ts setspecs parm_declarator maybe_attribute
2510 { $$ = build_c_parm (current_declspecs,
2511 chainon ($4, all_prefix_attributes), $3);
2512 POP_DECLSPEC_STACK; }
2513 | declspecs_ts setspecs notype_declarator maybe_attribute
2514 { $$ = build_c_parm (current_declspecs,
2515 chainon ($4, all_prefix_attributes), $3);
2516 POP_DECLSPEC_STACK; }
2517 | declspecs_ts setspecs absdcl_maybe_attribute
2518 { $$ = $3;
2519 POP_DECLSPEC_STACK; }
2520 | declspecs_nots setspecs notype_declarator maybe_attribute
2521 { $$ = build_c_parm (current_declspecs,
2522 chainon ($4, all_prefix_attributes), $3);
2523 POP_DECLSPEC_STACK; }
2525 | declspecs_nots setspecs absdcl_maybe_attribute
2526 { $$ = $3;
2527 POP_DECLSPEC_STACK; }
2528 ;
2530 /* The first parm, which must suck attributes from off the top of the parser
2531 stack. */
2532 firstparm:
2533 declspecs_ts_nosa setspecs_fp parm_declarator maybe_attribute
2534 { $$ = build_c_parm (current_declspecs,
2535 chainon ($4, all_prefix_attributes), $3);
2536 POP_DECLSPEC_STACK; }
2537 | declspecs_ts_nosa setspecs_fp notype_declarator maybe_attribute
2538 { $$ = build_c_parm (current_declspecs,
2539 chainon ($4, all_prefix_attributes), $3);
2540 POP_DECLSPEC_STACK; }
2541 | declspecs_ts_nosa setspecs_fp absdcl_maybe_attribute
2542 { $$ = $3;
2543 POP_DECLSPEC_STACK; }
2544 | declspecs_nots_nosa setspecs_fp notype_declarator maybe_attribute
2545 { $$ = build_c_parm (current_declspecs,
2546 chainon ($4, all_prefix_attributes), $3);
2547 POP_DECLSPEC_STACK; }
2549 | declspecs_nots_nosa setspecs_fp absdcl_maybe_attribute
2550 { $$ = $3;
2551 POP_DECLSPEC_STACK; }
2552 ;
2554 setspecs_fp:
2555 setspecs
2556 { prefix_attributes = chainon (prefix_attributes, $<ttype>-2);
2557 all_prefix_attributes = prefix_attributes; }
2558 ;
2560 /* This is used in a function definition
2561 where either a parmlist or an identifier list is ok.
2562 Its value is a list of ..._TYPE nodes or a list of identifiers. */
2563 parmlist_or_identifiers:
2564 maybe_attribute
2565 { push_scope ();
2566 declare_parm_level (); }
2567 parmlist_or_identifiers_1
2568 { $$ = $3;
2569 pop_scope (); }
2570 ;
2572 parmlist_or_identifiers_1:
2573 parmlist_1
2574 | identifiers ')'
2575 { $$ = XOBNEW (&parser_obstack, struct c_arg_info);
2576 $$->parms = 0;
2577 $$->tags = 0;
2578 $$->types = $1;
2579 $$->others = 0;
2581 /* Make sure we have a parmlist after attributes. */
2582 if ($<ttype>-1 != 0)
2583 YYERROR1;
2584 }
2585 ;
2587 /* A nonempty list of identifiers. */
2588 identifiers:
2589 IDENTIFIER
2590 { $$ = build_tree_list (NULL_TREE, $1); }
2591 | identifiers ',' IDENTIFIER
2592 { $$ = chainon ($1, build_tree_list (NULL_TREE, $3)); }
2593 ;
2595 /* A nonempty list of identifiers, including typenames. */
2596 identifiers_or_typenames:
2597 identifier
2598 { $$ = build_tree_list (NULL_TREE, $1); }
2599 | identifiers_or_typenames ',' identifier
2600 { $$ = chainon ($1, build_tree_list (NULL_TREE, $3)); }
2601 ;
2603 extension:
2604 EXTENSION
2605 { $$ = SAVE_EXT_FLAGS ();
2606 pedantic = 0;
2607 warn_pointer_arith = 0;
2608 warn_traditional = 0;
2609 flag_iso = 0; }
2610 ;
2611 \f
2612 @@ifobjc
2613 /* Objective-C productions. */
2615 objcdef:
2616 classdef
2617 | classdecl
2618 | aliasdecl
2619 | protocoldef
2620 | methoddef
2621 | AT_END
2622 {
2623 objc_finish_implementation ();
2624 }
2625 ;
2627 /* A nonempty list of identifiers. */
2628 identifier_list:
2629 identifier
2630 { $$ = build_tree_list (NULL_TREE, $1); }
2631 | identifier_list ',' identifier
2632 { $$ = chainon ($1, build_tree_list (NULL_TREE, $3)); }
2633 ;
2635 classdecl:
2636 AT_CLASS identifier_list ';'
2637 {
2638 objc_declare_class ($2);
2639 }
2640 ;
2642 aliasdecl:
2643 AT_ALIAS identifier identifier ';'
2644 {
2645 objc_declare_alias ($2, $3);
2646 }
2647 ;
2649 superclass:
2650 ':' identifier { $$ = $2; }
2651 | /* NULL */ %prec HYPERUNARY { $$ = NULL_TREE; }
2652 ;
2654 class_ivars:
2655 '{' ivar_decl_list '}'
2656 | /* NULL */
2657 ;
2659 classdef:
2660 AT_INTERFACE identifier superclass protocolrefs
2661 {
2662 objc_start_class_interface ($2, $3, $4);
2663 }
2664 class_ivars
2665 {
2666 objc_continue_interface ();
2667 }
2668 methodprotolist AT_END
2669 {
2670 objc_finish_interface ();
2671 }
2673 | AT_IMPLEMENTATION identifier superclass
2674 {
2675 objc_start_class_implementation ($2, $3);
2676 }
2677 class_ivars
2678 {
2679 objc_continue_implementation ();
2680 }
2682 | AT_INTERFACE identifier '(' identifier ')' protocolrefs
2683 {
2684 objc_start_category_interface ($2, $4, $6);
2685 }
2686 methodprotolist AT_END
2687 {
2688 objc_finish_interface ();
2689 }
2691 | AT_IMPLEMENTATION identifier '(' identifier ')'
2692 {
2693 objc_start_category_implementation ($2, $4);
2694 }
2695 ;
2697 protocoldef:
2698 AT_PROTOCOL identifier protocolrefs
2699 {
2700 objc_pq_context = 1;
2701 objc_start_protocol ($2, $3);
2702 }
2703 methodprotolist AT_END
2704 {
2705 objc_pq_context = 0;
2706 objc_finish_interface ();
2707 }
2708 /* The @protocol forward-declaration production introduces a
2709 reduce/reduce conflict on ';', which should be resolved in
2710 favor of the production 'identifier_list -> identifier'. */
2711 | AT_PROTOCOL identifier_list ';'
2712 {
2713 objc_declare_protocols ($2);
2714 }
2715 ;
2717 protocolrefs:
2718 /* empty */
2719 {
2720 $$ = NULL_TREE;
2721 }
2722 | non_empty_protocolrefs
2723 ;
2725 non_empty_protocolrefs:
2726 ARITHCOMPARE identifier_list ARITHCOMPARE
2727 {
2728 if ($1 == LT_EXPR && $3 == GT_EXPR)
2729 $$ = $2;
2730 else
2731 YYERROR1;
2732 }
2733 ;
2735 ivar_decl_list:
2736 /* empty */
2737 | ivar_decl_list visibility_spec ivar_decls
2738 ;
2740 visibility_spec:
2741 /* empty */
2742 | AT_PRIVATE { objc_set_visibility (2); }
2743 | AT_PROTECTED { objc_set_visibility (0); }
2744 | AT_PUBLIC { objc_set_visibility (1); }
2745 ;
2747 ivar_decls:
2748 /* empty */
2749 | ivar_decls ivar_decl ';'
2750 | ivar_decls ';'
2751 {
2752 if (pedantic)
2753 pedwarn ("extra semicolon in struct or union specified");
2754 }
2755 ;
2757 ivar_decl:
2758 component_decl
2759 {
2760 /* Comma-separated ivars are chained together in
2761 reverse order; add them one by one. */
2762 tree ivar = nreverse ($1);
2764 for (; ivar; ivar = TREE_CHAIN (ivar))
2765 objc_add_instance_variable (copy_node (ivar));
2766 }
2767 ;
2769 opt_semi:
2770 /* NULL */
2771 | ';'
2772 {
2773 if (pedantic)
2774 pedwarn ("extra semicolon in method definition specified");
2775 }
2776 ;
2778 methodtype:
2779 '+'
2780 | '-'
2781 ;
2783 methoddef:
2784 methodtype
2785 {
2786 objc_set_method_type ($1);
2787 objc_pq_context = 1;
2788 }
2789 methoddecl opt_semi
2790 {
2791 objc_pq_context = 0;
2792 objc_start_method_definition ($3);
2793 }
2794 compstmt_or_error
2795 {
2796 objc_finish_method_definition (current_function_decl);
2797 }
2798 ;
2800 /* the reason for the strange actions in this rule
2801 is so that notype_initdecls when reached via datadef
2802 can find a valid list of type and sc specs in $0. */
2804 methodprotolist:
2805 /* empty */
2806 | methodprotolist methodproto
2807 | methodprotolist { $<ttype>$ = NULL_TREE; } datadef
2808 ;
2810 semi_or_error:
2811 ';'
2812 | error
2813 ;
2815 methodproto:
2816 methodtype
2817 {
2818 objc_set_method_type ($1);
2819 /* Remember protocol qualifiers in prototypes. */
2820 objc_pq_context = 1;
2821 }
2822 methoddecl
2823 {
2824 /* Forget protocol qualifiers here. */
2825 objc_pq_context = 0;
2826 objc_add_method_declaration ($3);
2827 }
2828 semi_or_error
2829 ;
2831 methoddecl:
2832 '(' objc_typename ')' unaryselector
2833 {
2834 $$ = objc_build_method_signature ($2, $4, NULL_TREE);
2835 }
2837 | unaryselector
2838 {
2839 $$ = objc_build_method_signature (NULL_TREE, $1, NULL_TREE);
2840 }
2842 | '(' objc_typename ')' keywordselector optparmlist
2843 {
2844 $$ = objc_build_method_signature ($2, $4, $5);
2845 }
2847 | keywordselector optparmlist
2848 {
2849 $$ = objc_build_method_signature (NULL_TREE, $1, $2);
2850 }
2851 ;
2853 /* Optional ObjC method parameters follow the C syntax, and may include '...'
2854 to denote a variable number of arguments. */
2856 optparmlist:
2857 optparms optellipsis
2858 {
2859 TREE_OVERFLOW ($$) = $2;
2860 }
2861 ;
2863 optparms:
2864 /* NULL */
2865 {
2866 $$ = make_node (TREE_LIST);
2867 }
2868 | optparms ',' parm
2869 {
2870 $$ = chainon ($1, build_tree_list (NULL_TREE,
2871 grokparm ($3)));
2872 }
2873 ;
2875 optellipsis:
2876 /* NULL */
2877 {
2878 $$ = 0;
2879 }
2880 | ',' ELLIPSIS
2881 {
2882 $$ = 1;
2883 }
2884 ;
2886 unaryselector:
2887 selector
2888 ;
2890 keywordselector:
2891 keyworddecl
2893 | keywordselector keyworddecl
2894 {
2895 $$ = chainon ($1, $2);
2896 }
2897 ;
2899 selector:
2900 IDENTIFIER
2901 | TYPENAME
2902 | CLASSNAME
2903 | reservedwords
2904 ;
2906 reservedwords:
2907 ENUM | STRUCT | UNION | IF | ELSE | WHILE | DO | FOR
2908 | SWITCH | CASE | DEFAULT | BREAK | CONTINUE | RETURN
2909 | GOTO | ASM_KEYWORD | SIZEOF | TYPEOF | ALIGNOF
2910 | TYPESPEC | TYPE_QUAL | OBJC_TYPE_QUAL
2911 ;
2913 objc_qual:
2914 OBJC_TYPE_QUAL
2915 ;
2917 objc_quals:
2918 objc_quals objc_qual
2919 {
2920 $$ = chainon ($1, build_tree_list (NULL_TREE, $2));
2921 }
2922 | /* NULL */
2923 {
2924 $$ = NULL_TREE;
2925 }
2926 ;
2928 objc_typename:
2929 objc_quals typename
2930 {
2931 $$ = build_tree_list ($1, groktypename ($2));
2932 }
2933 | objc_quals
2934 {
2935 $$ = build_tree_list ($1, NULL_TREE);
2936 }
2937 ;
2939 keyworddecl:
2940 selector ':' '(' objc_typename ')' identifier
2941 {
2942 $$ = objc_build_keyword_decl ($1, $4, $6);
2943 }
2945 | selector ':' identifier
2946 {
2947 $$ = objc_build_keyword_decl ($1, NULL_TREE, $3);
2948 }
2950 | ':' '(' objc_typename ')' identifier
2951 {
2952 $$ = objc_build_keyword_decl (NULL_TREE, $3, $5);
2953 }
2955 | ':' identifier
2956 {
2957 $$ = objc_build_keyword_decl (NULL_TREE, NULL_TREE, $2);
2958 }
2959 ;
2961 messageargs:
2962 selector
2963 | keywordarglist
2964 ;
2966 keywordarglist:
2967 keywordarg
2968 | keywordarglist keywordarg
2969 {
2970 $$ = chainon ($1, $2);
2971 }
2972 ;
2975 keywordexpr:
2976 nonnull_exprlist
2977 {
2978 if (TREE_CHAIN ($1) == NULL_TREE)
2979 /* just return the expr., remove a level of indirection */
2980 $$ = TREE_VALUE ($1);
2981 else
2982 /* we have a comma expr., we will collapse later */
2983 $$ = $1;
2984 }
2985 ;
2987 keywordarg:
2988 selector ':' keywordexpr
2989 {
2990 $$ = build_tree_list ($1, $3);
2991 }
2992 | ':' keywordexpr
2993 {
2994 $$ = build_tree_list (NULL_TREE, $2);
2995 }
2996 ;
2998 receiver:
2999 expr
3000 { $$ = $1.value; }
3001 | CLASSNAME
3002 {
3003 $$ = objc_get_class_reference ($1);
3004 }
3005 | TYPENAME
3006 {
3007 $$ = objc_get_class_reference ($1);
3008 }
3009 ;
3011 objcmessageexpr:
3012 '[' receiver messageargs ']'
3013 { $$ = build_tree_list ($2, $3); }
3014 ;
3016 selectorarg:
3017 selector
3018 | keywordnamelist
3019 ;
3021 keywordnamelist:
3022 keywordname
3023 | keywordnamelist keywordname
3024 {
3025 $$ = chainon ($1, $2);
3026 }
3027 ;
3029 keywordname:
3030 selector ':'
3031 {
3032 $$ = build_tree_list ($1, NULL_TREE);
3033 }
3034 | ':'
3035 {
3036 $$ = build_tree_list (NULL_TREE, NULL_TREE);
3037 }
3038 ;
3040 objcselectorexpr:
3041 AT_SELECTOR '(' selectorarg ')'
3042 {
3043 $$ = $3;
3044 }
3045 ;
3047 objcprotocolexpr:
3048 AT_PROTOCOL '(' identifier ')'
3049 {
3050 $$ = $3;
3051 }
3052 ;
3054 /* extension to support C-structures in the archiver */
3056 objcencodeexpr:
3057 AT_ENCODE '(' typename ')'
3058 {
3059 $$ = groktypename ($3);
3060 }
3061 ;
3063 @@end_ifobjc
3064 %%
3066 /* yylex() is a thin wrapper around c_lex(), all it does is translate
3067 cpplib.h's token codes into yacc's token codes. */
3069 static enum cpp_ttype last_token;
3071 /* The reserved keyword table. */
3072 struct resword
3073 {
3074 const char *word;
3075 ENUM_BITFIELD(rid) rid : 16;
3076 unsigned int disable : 16;
3077 };
3079 /* Disable mask. Keywords are disabled if (reswords[i].disable & mask) is
3080 _true_. */
3081 #define D_C89 0x01 /* not in C89 */
3082 #define D_EXT 0x02 /* GCC extension */
3083 #define D_EXT89 0x04 /* GCC extension incorporated in C99 */
3084 #define D_OBJC 0x08 /* Objective C only */
3086 static const struct resword reswords[] =
3087 {
3088 { "_Bool", RID_BOOL, 0 },
3089 { "_Complex", RID_COMPLEX, 0 },
3090 { "__FUNCTION__", RID_FUNCTION_NAME, 0 },
3091 { "__PRETTY_FUNCTION__", RID_PRETTY_FUNCTION_NAME, 0 },
3092 { "__alignof", RID_ALIGNOF, 0 },
3093 { "__alignof__", RID_ALIGNOF, 0 },
3094 { "__asm", RID_ASM, 0 },
3095 { "__asm__", RID_ASM, 0 },
3096 { "__attribute", RID_ATTRIBUTE, 0 },
3097 { "__attribute__", RID_ATTRIBUTE, 0 },
3098 { "__builtin_choose_expr", RID_CHOOSE_EXPR, 0 },
3099 { "__builtin_offsetof", RID_OFFSETOF, 0 },
3100 { "__builtin_types_compatible_p", RID_TYPES_COMPATIBLE_P, 0 },
3101 { "__builtin_va_arg", RID_VA_ARG, 0 },
3102 { "__complex", RID_COMPLEX, 0 },
3103 { "__complex__", RID_COMPLEX, 0 },
3104 { "__const", RID_CONST, 0 },
3105 { "__const__", RID_CONST, 0 },
3106 { "__extension__", RID_EXTENSION, 0 },
3107 { "__func__", RID_C99_FUNCTION_NAME, 0 },
3108 { "__imag", RID_IMAGPART, 0 },
3109 { "__imag__", RID_IMAGPART, 0 },
3110 { "__inline", RID_INLINE, 0 },
3111 { "__inline__", RID_INLINE, 0 },
3112 { "__label__", RID_LABEL, 0 },
3113 { "__real", RID_REALPART, 0 },
3114 { "__real__", RID_REALPART, 0 },
3115 { "__restrict", RID_RESTRICT, 0 },
3116 { "__restrict__", RID_RESTRICT, 0 },
3117 { "__signed", RID_SIGNED, 0 },
3118 { "__signed__", RID_SIGNED, 0 },
3119 { "__thread", RID_THREAD, 0 },
3120 { "__typeof", RID_TYPEOF, 0 },
3121 { "__typeof__", RID_TYPEOF, 0 },
3122 { "__volatile", RID_VOLATILE, 0 },
3123 { "__volatile__", RID_VOLATILE, 0 },
3124 { "asm", RID_ASM, D_EXT },
3125 { "auto", RID_AUTO, 0 },
3126 { "break", RID_BREAK, 0 },
3127 { "case", RID_CASE, 0 },
3128 { "char", RID_CHAR, 0 },
3129 { "const", RID_CONST, 0 },
3130 { "continue", RID_CONTINUE, 0 },
3131 { "default", RID_DEFAULT, 0 },
3132 { "do", RID_DO, 0 },
3133 { "double", RID_DOUBLE, 0 },
3134 { "else", RID_ELSE, 0 },
3135 { "enum", RID_ENUM, 0 },
3136 { "extern", RID_EXTERN, 0 },
3137 { "float", RID_FLOAT, 0 },
3138 { "for", RID_FOR, 0 },
3139 { "goto", RID_GOTO, 0 },
3140 { "if", RID_IF, 0 },
3141 { "inline", RID_INLINE, D_EXT89 },
3142 { "int", RID_INT, 0 },
3143 { "long", RID_LONG, 0 },
3144 { "register", RID_REGISTER, 0 },
3145 { "restrict", RID_RESTRICT, D_C89 },
3146 { "return", RID_RETURN, 0 },
3147 { "short", RID_SHORT, 0 },
3148 { "signed", RID_SIGNED, 0 },
3149 { "sizeof", RID_SIZEOF, 0 },
3150 { "static", RID_STATIC, 0 },
3151 { "struct", RID_STRUCT, 0 },
3152 { "switch", RID_SWITCH, 0 },
3153 { "typedef", RID_TYPEDEF, 0 },
3154 { "typeof", RID_TYPEOF, D_EXT },
3155 { "union", RID_UNION, 0 },
3156 { "unsigned", RID_UNSIGNED, 0 },
3157 { "void", RID_VOID, 0 },
3158 { "volatile", RID_VOLATILE, 0 },
3159 { "while", RID_WHILE, 0 },
3161 @@ifobjc
3163 /* These objc keywords are recognized only immediately after
3164 an '@'. */
3165 { "class", RID_AT_CLASS, D_OBJC },
3166 { "compatibility_alias", RID_AT_ALIAS, D_OBJC },
3167 { "defs", RID_AT_DEFS, D_OBJC },
3168 { "encode", RID_AT_ENCODE, D_OBJC },
3169 { "end", RID_AT_END, D_OBJC },
3170 { "implementation", RID_AT_IMPLEMENTATION, D_OBJC },
3171 { "interface", RID_AT_INTERFACE, D_OBJC },
3172 { "private", RID_AT_PRIVATE, D_OBJC },
3173 { "protected", RID_AT_PROTECTED, D_OBJC },
3174 { "protocol", RID_AT_PROTOCOL, D_OBJC },
3175 { "public", RID_AT_PUBLIC, D_OBJC },
3176 { "selector", RID_AT_SELECTOR, D_OBJC },
3177 { "throw", RID_AT_THROW, D_OBJC },
3178 { "try", RID_AT_TRY, D_OBJC },
3179 { "catch", RID_AT_CATCH, D_OBJC },
3180 { "finally", RID_AT_FINALLY, D_OBJC },
3181 { "synchronized", RID_AT_SYNCHRONIZED, D_OBJC },
3182 /* These are recognized only in protocol-qualifier context
3183 (see above) */
3184 { "bycopy", RID_BYCOPY, D_OBJC },
3185 { "byref", RID_BYREF, D_OBJC },
3186 { "in", RID_IN, D_OBJC },
3187 { "inout", RID_INOUT, D_OBJC },
3188 { "oneway", RID_ONEWAY, D_OBJC },
3189 { "out", RID_OUT, D_OBJC },
3190 @@end_ifobjc
3191 };
3192 #define N_reswords (sizeof reswords / sizeof (struct resword))
3194 /* Table mapping from RID_* constants to yacc token numbers.
3195 Unfortunately we have to have entries for all the keywords in all
3196 three languages. */
3197 static const short rid_to_yy[RID_MAX] =
3198 {
3199 /* RID_STATIC */ STATIC,
3200 /* RID_UNSIGNED */ TYPESPEC,
3201 /* RID_LONG */ TYPESPEC,
3202 /* RID_CONST */ TYPE_QUAL,
3203 /* RID_EXTERN */ SCSPEC,
3204 /* RID_REGISTER */ SCSPEC,
3205 /* RID_TYPEDEF */ SCSPEC,
3206 /* RID_SHORT */ TYPESPEC,
3207 /* RID_INLINE */ SCSPEC,
3208 /* RID_VOLATILE */ TYPE_QUAL,
3209 /* RID_SIGNED */ TYPESPEC,
3210 /* RID_AUTO */ SCSPEC,
3211 /* RID_RESTRICT */ TYPE_QUAL,
3213 /* C extensions */
3214 /* RID_COMPLEX */ TYPESPEC,
3215 /* RID_THREAD */ SCSPEC,
3217 /* C++ */
3218 /* RID_FRIEND */ 0,
3219 /* RID_VIRTUAL */ 0,
3220 /* RID_EXPLICIT */ 0,
3221 /* RID_EXPORT */ 0,
3222 /* RID_MUTABLE */ 0,
3224 /* ObjC */
3225 /* RID_IN */ OBJC_TYPE_QUAL,
3226 /* RID_OUT */ OBJC_TYPE_QUAL,
3227 /* RID_INOUT */ OBJC_TYPE_QUAL,
3228 /* RID_BYCOPY */ OBJC_TYPE_QUAL,
3229 /* RID_BYREF */ OBJC_TYPE_QUAL,
3230 /* RID_ONEWAY */ OBJC_TYPE_QUAL,
3232 /* C */
3233 /* RID_INT */ TYPESPEC,
3234 /* RID_CHAR */ TYPESPEC,
3235 /* RID_FLOAT */ TYPESPEC,
3236 /* RID_DOUBLE */ TYPESPEC,
3237 /* RID_VOID */ TYPESPEC,
3238 /* RID_ENUM */ ENUM,
3239 /* RID_STRUCT */ STRUCT,
3240 /* RID_UNION */ UNION,
3241 /* RID_IF */ IF,
3242 /* RID_ELSE */ ELSE,
3243 /* RID_WHILE */ WHILE,
3244 /* RID_DO */ DO,
3245 /* RID_FOR */ FOR,
3246 /* RID_SWITCH */ SWITCH,
3247 /* RID_CASE */ CASE,
3248 /* RID_DEFAULT */ DEFAULT,
3249 /* RID_BREAK */ BREAK,
3250 /* RID_CONTINUE */ CONTINUE,
3251 /* RID_RETURN */ RETURN,
3252 /* RID_GOTO */ GOTO,
3253 /* RID_SIZEOF */ SIZEOF,
3255 /* C extensions */
3256 /* RID_ASM */ ASM_KEYWORD,
3257 /* RID_TYPEOF */ TYPEOF,
3258 /* RID_ALIGNOF */ ALIGNOF,
3259 /* RID_ATTRIBUTE */ ATTRIBUTE,
3260 /* RID_VA_ARG */ VA_ARG,
3261 /* RID_EXTENSION */ EXTENSION,
3262 /* RID_IMAGPART */ IMAGPART,
3263 /* RID_REALPART */ REALPART,
3264 /* RID_LABEL */ LABEL,
3266 /* RID_CHOOSE_EXPR */ CHOOSE_EXPR,
3267 /* RID_TYPES_COMPATIBLE_P */ TYPES_COMPATIBLE_P,
3269 /* RID_FUNCTION_NAME */ FUNC_NAME,
3270 /* RID_PRETTY_FUNCTION_NAME */ FUNC_NAME,
3271 /* RID_C99_FUNCTION_NAME */ FUNC_NAME,
3273 /* C++ */
3274 /* RID_BOOL */ TYPESPEC,
3275 /* RID_WCHAR */ 0,
3276 /* RID_CLASS */ 0,
3277 /* RID_PUBLIC */ 0,
3278 /* RID_PRIVATE */ 0,
3279 /* RID_PROTECTED */ 0,
3280 /* RID_TEMPLATE */ 0,
3281 /* RID_NULL */ 0,
3282 /* RID_CATCH */ 0,
3283 /* RID_DELETE */ 0,
3284 /* RID_FALSE */ 0,
3285 /* RID_NAMESPACE */ 0,
3286 /* RID_NEW */ 0,
3287 /* RID_OFFSETOF */ OFFSETOF,
3288 /* RID_OPERATOR */ 0,
3289 /* RID_THIS */ 0,
3290 /* RID_THROW */ 0,
3291 /* RID_TRUE */ 0,
3292 /* RID_TRY */ 0,
3293 /* RID_TYPENAME */ 0,
3294 /* RID_TYPEID */ 0,
3295 /* RID_USING */ 0,
3297 /* casts */
3298 /* RID_CONSTCAST */ 0,
3299 /* RID_DYNCAST */ 0,
3300 /* RID_REINTCAST */ 0,
3301 /* RID_STATCAST */ 0,
3303 /* Objective C */
3304 /* RID_AT_ENCODE */ AT_ENCODE,
3305 /* RID_AT_END */ AT_END,
3306 /* RID_AT_CLASS */ AT_CLASS,
3307 /* RID_AT_ALIAS */ AT_ALIAS,
3308 /* RID_AT_DEFS */ AT_DEFS,
3309 /* RID_AT_PRIVATE */ AT_PRIVATE,
3310 /* RID_AT_PROTECTED */ AT_PROTECTED,
3311 /* RID_AT_PUBLIC */ AT_PUBLIC,
3312 /* RID_AT_PROTOCOL */ AT_PROTOCOL,
3313 /* RID_AT_SELECTOR */ AT_SELECTOR,
3314 /* RID_AT_THROW */ AT_THROW,
3315 /* RID_AT_TRY */ AT_TRY,
3316 /* RID_AT_CATCH */ AT_CATCH,
3317 /* RID_AT_FINALLY */ AT_FINALLY,
3318 /* RID_AT_SYNCHRONIZED */ AT_SYNCHRONIZED,
3319 /* RID_AT_INTERFACE */ AT_INTERFACE,
3320 /* RID_AT_IMPLEMENTATION */ AT_IMPLEMENTATION
3321 };
3323 static void
3324 init_reswords (void)
3325 {
3326 unsigned int i;
3327 tree id;
3328 int mask = (flag_isoc99 ? 0 : D_C89)
3329 | (flag_no_asm ? (flag_isoc99 ? D_EXT : D_EXT|D_EXT89) : 0);
3331 if (!c_dialect_objc ())
3332 mask |= D_OBJC;
3334 ridpointers = GGC_CNEWVEC (tree, (int) RID_MAX);
3335 for (i = 0; i < N_reswords; i++)
3336 {
3337 /* If a keyword is disabled, do not enter it into the table
3338 and so create a canonical spelling that isn't a keyword. */
3339 if (reswords[i].disable & mask)
3340 continue;
3342 id = get_identifier (reswords[i].word);
3343 C_RID_CODE (id) = reswords[i].rid;
3344 C_IS_RESERVED_WORD (id) = 1;
3345 ridpointers [(int) reswords[i].rid] = id;
3346 }
3347 }
3349 #define NAME(type) cpp_type2name (type)
3351 static void
3352 yyerror (const char *msgid)
3353 {
3354 c_parse_error (msgid, last_token, yylval.ttype);
3355 }
3357 static int
3358 yylexname (void)
3359 {
3360 tree decl;
3362 @@ifobjc
3363 int objc_force_identifier = objc_need_raw_identifier;
3364 OBJC_NEED_RAW_IDENTIFIER (0);
3365 @@end_ifobjc
3367 if (C_IS_RESERVED_WORD (yylval.ttype))
3368 {
3369 enum rid rid_code = C_RID_CODE (yylval.ttype);
3371 @@ifobjc
3372 if (!OBJC_IS_AT_KEYWORD (rid_code)
3373 && (!OBJC_IS_PQ_KEYWORD (rid_code) || objc_pq_context))
3374 @@end_ifobjc
3375 {
3376 /* Return the canonical spelling for this keyword. */
3377 yylval.ttype = ridpointers[(int) rid_code];
3378 return rid_to_yy[(int) rid_code];
3379 }
3380 }
3382 decl = lookup_name (yylval.ttype);
3383 if (decl)
3384 {
3385 if (TREE_CODE (decl) == TYPE_DECL)
3386 return TYPENAME;
3387 }
3388 @@ifobjc
3389 else
3390 {
3391 tree objc_interface_decl = objc_is_class_name (yylval.ttype);
3392 /* ObjC class names are in the same namespace as variables and
3393 typedefs, and hence are shadowed by local declarations. */
3394 if (objc_interface_decl
3395 && (global_bindings_p ()
3396 || (!objc_force_identifier && !decl)))
3397 {
3398 yylval.ttype = objc_interface_decl;
3399 return CLASSNAME;
3400 }
3401 }
3402 @@end_ifobjc
3404 return IDENTIFIER;
3405 }
3407 static inline int
3408 _yylex (void)
3409 {
3410 get_next:
3411 last_token = c_lex (&yylval.ttype);
3412 switch (last_token)
3413 {
3414 case CPP_EQ: return '=';
3415 case CPP_NOT: return '!';
3416 case CPP_GREATER: yylval.code = GT_EXPR; return ARITHCOMPARE;
3417 case CPP_LESS: yylval.code = LT_EXPR; return ARITHCOMPARE;
3418 case CPP_PLUS: yylval.code = PLUS_EXPR; return '+';
3419 case CPP_MINUS: yylval.code = MINUS_EXPR; return '-';
3420 case CPP_MULT: yylval.code = MULT_EXPR; return '*';
3421 case CPP_DIV: yylval.code = TRUNC_DIV_EXPR; return '/';
3422 case CPP_MOD: yylval.code = TRUNC_MOD_EXPR; return '%';
3423 case CPP_AND: yylval.code = BIT_AND_EXPR; return '&';
3424 case CPP_OR: yylval.code = BIT_IOR_EXPR; return '|';
3425 case CPP_XOR: yylval.code = BIT_XOR_EXPR; return '^';
3426 case CPP_RSHIFT: yylval.code = RSHIFT_EXPR; return RSHIFT;
3427 case CPP_LSHIFT: yylval.code = LSHIFT_EXPR; return LSHIFT;
3429 case CPP_COMPL: return '~';
3430 case CPP_AND_AND: return ANDAND;
3431 case CPP_OR_OR: return OROR;
3432 case CPP_QUERY: return '?';
3433 case CPP_OPEN_PAREN: return '(';
3434 case CPP_EQ_EQ: yylval.code = EQ_EXPR; return EQCOMPARE;
3435 case CPP_NOT_EQ: yylval.code = NE_EXPR; return EQCOMPARE;
3436 case CPP_GREATER_EQ:yylval.code = GE_EXPR; return ARITHCOMPARE;
3437 case CPP_LESS_EQ: yylval.code = LE_EXPR; return ARITHCOMPARE;
3439 case CPP_PLUS_EQ: yylval.code = PLUS_EXPR; return ASSIGN;
3440 case CPP_MINUS_EQ: yylval.code = MINUS_EXPR; return ASSIGN;
3441 case CPP_MULT_EQ: yylval.code = MULT_EXPR; return ASSIGN;
3442 case CPP_DIV_EQ: yylval.code = TRUNC_DIV_EXPR; return ASSIGN;
3443 case CPP_MOD_EQ: yylval.code = TRUNC_MOD_EXPR; return ASSIGN;
3444 case CPP_AND_EQ: yylval.code = BIT_AND_EXPR; return ASSIGN;
3445 case CPP_OR_EQ: yylval.code = BIT_IOR_EXPR; return ASSIGN;
3446 case CPP_XOR_EQ: yylval.code = BIT_XOR_EXPR; return ASSIGN;
3447 case CPP_RSHIFT_EQ: yylval.code = RSHIFT_EXPR; return ASSIGN;
3448 case CPP_LSHIFT_EQ: yylval.code = LSHIFT_EXPR; return ASSIGN;
3450 case CPP_OPEN_SQUARE: return '[';
3451 case CPP_CLOSE_SQUARE: return ']';
3452 case CPP_OPEN_BRACE: return '{';
3453 case CPP_CLOSE_BRACE: return '}';
3454 case CPP_ELLIPSIS: return ELLIPSIS;
3456 case CPP_PLUS_PLUS: return PLUSPLUS;
3457 case CPP_MINUS_MINUS: return MINUSMINUS;
3458 case CPP_DEREF: return POINTSAT;
3459 case CPP_DOT: return '.';
3461 /* The following tokens may affect the interpretation of any
3462 identifiers following, if doing Objective-C. */
3463 case CPP_COLON: OBJC_NEED_RAW_IDENTIFIER (0); return ':';
3464 case CPP_COMMA: OBJC_NEED_RAW_IDENTIFIER (0); return ',';
3465 case CPP_CLOSE_PAREN: OBJC_NEED_RAW_IDENTIFIER (0); return ')';
3466 case CPP_SEMICOLON: OBJC_NEED_RAW_IDENTIFIER (0); return ';';
3468 case CPP_EOF:
3469 return 0;
3471 case CPP_NAME:
3472 return yylexname ();
3474 case CPP_AT_NAME:
3475 /* This only happens in Objective-C; it must be a keyword. */
3476 return rid_to_yy [(int) C_RID_CODE (yylval.ttype)];
3478 case CPP_NUMBER:
3479 case CPP_CHAR:
3480 case CPP_WCHAR:
3481 return CONSTANT;
3483 case CPP_STRING:
3484 case CPP_WSTRING:
3485 return STRING;
3487 case CPP_OBJC_STRING:
3488 return OBJC_STRING;
3490 /* These tokens are C++ specific (and will not be generated
3491 in C mode, but let's be cautious). */
3492 case CPP_SCOPE:
3493 case CPP_DEREF_STAR:
3494 case CPP_DOT_STAR:
3495 case CPP_MIN_EQ:
3496 case CPP_MAX_EQ:
3497 case CPP_MIN:
3498 case CPP_MAX:
3499 /* These tokens should not survive translation phase 4. */
3500 case CPP_HASH:
3501 case CPP_PASTE:
3502 error ("syntax error at %qs token", NAME(last_token));
3503 goto get_next;
3505 default:
3506 abort ();
3507 }
3508 /* NOTREACHED */
3509 }
3511 static int
3512 yylex (void)
3513 {
3514 int r;
3515 timevar_push (TV_LEX);
3516 r = _yylex();
3517 timevar_pop (TV_LEX);
3518 return r;
3519 }
3521 /* Function used when yydebug is set, to print a token in more detail. */
3523 static void
3524 yyprint (FILE *file, int yychar, YYSTYPE yyl)
3525 {
3526 tree t = yyl.ttype;
3528 fprintf (file, " [%s]", NAME(last_token));
3530 switch (yychar)
3531 {
3532 case IDENTIFIER:
3533 case TYPENAME:
3534 case TYPESPEC:
3535 case TYPE_QUAL:
3536 case SCSPEC:
3537 case STATIC:
3538 if (IDENTIFIER_POINTER (t))
3539 fprintf (file, " '%s'", IDENTIFIER_POINTER (t));
3540 break;
3542 case CONSTANT:
3543 fprintf (file, " %s", GET_MODE_NAME (TYPE_MODE (TREE_TYPE (t))));
3544 if (TREE_CODE (t) == INTEGER_CST)
3545 {
3546 fputs (" ", file);
3547 fprintf (file, HOST_WIDE_INT_PRINT_DOUBLE_HEX,
3548 TREE_INT_CST_HIGH (t), TREE_INT_CST_LOW (t));
3549 }
3550 break;
3551 }
3552 }
3553 \f
3554 /* This is not the ideal place to put this, but we have to get it out
3555 of c-lex.c because cp/lex.c has its own version. */
3557 /* Parse the file. */
3558 void
3559 c_parse_file (void)
3560 {
3561 yyparse ();
3563 if (malloced_yyss)
3564 {
3565 free (malloced_yyss);
3566 free (malloced_yyvs);
3567 malloced_yyss = 0;
3568 }
3569 }
3571 #ifdef __XGETTEXT__
3572 /* Depending on the version of Bison used to compile this grammar,
3573 it may issue generic diagnostics spelled "syntax error" or
3574 "parse error". To prevent this from changing the translation
3575 template randomly, we list all the variants of this particular
3576 diagnostic here. Translators: there is no fine distinction
3577 between diagnostics with "syntax error" in them, and diagnostics
3578 with "parse error" in them. It's okay to give them both the same
3579 translation. */
3580 const char d1[] = N_("syntax error");
3581 const char d2[] = N_("parse error");
3582 const char d3[] = N_("syntax error; also virtual memory exhausted");
3583 const char d4[] = N_("parse error; also virtual memory exhausted");
3584 const char d5[] = N_("syntax error: cannot back up");
3585 const char d6[] = N_("parse error: cannot back up");
3586 #endif
3588 #include "gt-c-parse.h"