| blob | 1affab4e7b8f29d138bbc6fcf9055aef21a432b9 |
1 /* YACC parser for C syntax and for Objective C. -*-c-*-
2 Copyright (C) 1987, 1988, 1989, 1992, 1993, 1994, 1995, 1996, 1997,
3 1998, 1999, 2000, 2001, 2002, 2003, 2004 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
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 ($3, all_prefix_attributes));
1324 start_init ($<ttype>$, $2, global_bindings_p ()); }
1325 init
1326 /* Note how the declaration of the variable is in effect while its init is parsed! */
1327 { finish_init ();
1328 maybe_warn_string_init (TREE_TYPE ($<ttype>5), $6);
1329 finish_decl ($<ttype>5, $6.value, $2); }
1330 | declarator maybeasm maybe_attribute
1331 { tree d = start_decl ($1, current_declspecs, false,
1332 chainon ($3, all_prefix_attributes));
1333 finish_decl (d, NULL_TREE, $2);
1334 }
1335 ;
1337 notype_initdcl:
1338 notype_declarator maybeasm maybe_attribute '='
1339 { $<ttype>$ = start_decl ($1, current_declspecs, true,
1340 chainon ($3, all_prefix_attributes));
1341 start_init ($<ttype>$, $2, global_bindings_p ()); }
1342 init
1343 /* Note how the declaration of the variable is in effect while its init is parsed! */
1344 { finish_init ();
1345 maybe_warn_string_init (TREE_TYPE ($<ttype>5), $6);
1346 finish_decl ($<ttype>5, $6.value, $2); }
1347 | notype_declarator maybeasm maybe_attribute
1348 { tree d = start_decl ($1, current_declspecs, false,
1349 chainon ($3, all_prefix_attributes));
1350 finish_decl (d, NULL_TREE, $2); }
1351 ;
1352 /* the * rules are dummies to accept the Apollo extended syntax
1353 so that the header files compile. */
1354 maybe_attribute:
1355 /* empty */
1356 { $$ = NULL_TREE; }
1357 | attributes
1358 { $$ = $1; }
1359 ;
1361 attributes:
1362 attribute
1363 { $$ = $1; }
1364 | attributes attribute
1365 { $$ = chainon ($1, $2); }
1366 ;
1368 attribute:
1369 ATTRIBUTE stop_string_translation
1370 '(' '(' attribute_list ')' ')' start_string_translation
1371 { $$ = $5; }
1372 | ATTRIBUTE error start_string_translation
1373 { $$ = NULL_TREE; }
1374 ;
1376 attribute_list:
1377 attrib
1378 { $$ = $1; }
1379 | attribute_list ',' attrib
1380 { $$ = chainon ($1, $3); }
1381 ;
1383 attrib:
1384 /* empty */
1385 { $$ = NULL_TREE; }
1386 | any_word
1387 { $$ = build_tree_list ($1, NULL_TREE); }
1388 | any_word '(' IDENTIFIER ')'
1389 { $$ = build_tree_list ($1, build_tree_list (NULL_TREE, $3)); }
1390 | any_word '(' IDENTIFIER ',' nonnull_exprlist ')'
1391 { $$ = build_tree_list ($1, tree_cons (NULL_TREE, $3, $5)); }
1392 | any_word '(' exprlist ')'
1393 { $$ = build_tree_list ($1, $3); }
1394 ;
1396 /* This still leaves out most reserved keywords,
1397 shouldn't we include them? */
1399 any_word:
1400 identifier
1401 | scspec
1402 | TYPESPEC
1403 | TYPE_QUAL
1404 ;
1406 scspec:
1407 STATIC
1408 | SCSPEC
1409 ;
1410 \f
1411 /* Initializers. `init' is the entry point. */
1413 init:
1414 expr_no_commas
1415 { $$ = $1; }
1416 | '{'
1417 { really_start_incremental_init (NULL_TREE); }
1418 initlist_maybe_comma '}'
1419 { $$ = pop_init_level (0); }
1420 | error
1421 { $$.value = error_mark_node; $$.original_code = ERROR_MARK; }
1422 ;
1424 /* `initlist_maybe_comma' is the guts of an initializer in braces. */
1425 initlist_maybe_comma:
1426 /* empty */
1427 { if (pedantic)
1428 pedwarn ("ISO C forbids empty initializer braces"); }
1429 | initlist1 maybecomma
1430 ;
1432 initlist1:
1433 initelt
1434 | initlist1 ',' initelt
1435 ;
1437 /* `initelt' is a single element of an initializer.
1438 It may use braces. */
1439 initelt:
1440 designator_list '=' initval
1441 { if (pedantic && !flag_isoc99)
1442 pedwarn ("ISO C90 forbids specifying subobject to initialize"); }
1443 | array_designator initval
1444 { if (pedantic)
1445 pedwarn ("obsolete use of designated initializer without %<=%>"); }
1446 | identifier ':'
1447 { set_init_label ($1);
1448 if (pedantic)
1449 pedwarn ("obsolete use of designated initializer with %<:%>"); }
1450 initval
1451 {}
1452 | initval
1453 ;
1455 initval:
1456 '{'
1457 { push_init_level (0); }
1458 initlist_maybe_comma '}'
1459 { process_init_element (pop_init_level (0)); }
1460 | expr_no_commas
1461 { process_init_element ($1); }
1462 | error
1463 ;
1465 designator_list:
1466 designator
1467 | designator_list designator
1468 ;
1470 designator:
1471 '.' identifier
1472 { set_init_label ($2); }
1473 | array_designator
1474 ;
1476 array_designator:
1477 '[' expr_no_commas ELLIPSIS expr_no_commas ']'
1478 { set_init_index ($2.value, $4.value);
1479 if (pedantic)
1480 pedwarn ("ISO C forbids specifying range of elements to initialize"); }
1481 | '[' expr_no_commas ']'
1482 { set_init_index ($2.value, NULL_TREE); }
1483 ;
1484 \f
1485 nested_function:
1486 declarator
1487 { if (pedantic)
1488 pedwarn ("ISO C forbids nested functions");
1490 push_function_context ();
1491 if (!start_function (current_declspecs, $1,
1492 all_prefix_attributes))
1493 {
1494 pop_function_context ();
1495 YYERROR1;
1496 }
1497 }
1498 old_style_parm_decls save_location
1499 { tree decl = current_function_decl;
1500 DECL_SOURCE_LOCATION (decl) = $4;
1501 store_parm_decls (); }
1502 /* This used to use compstmt_or_error. That caused a bug with
1503 input `f(g) int g {}', where the use of YYERROR1 above caused
1504 an error which then was handled by compstmt_or_error. There
1505 followed a repeated execution of that same rule, which called
1506 YYERROR1 again, and so on. */
1507 compstmt
1508 { tree decl = current_function_decl;
1509 add_stmt ($6);
1510 finish_function ();
1511 pop_function_context ();
1512 add_stmt (build_stmt (DECL_EXPR, decl)); }
1513 ;
1515 notype_nested_function:
1516 notype_declarator
1517 { if (pedantic)
1518 pedwarn ("ISO C forbids nested functions");
1520 push_function_context ();
1521 if (!start_function (current_declspecs, $1,
1522 all_prefix_attributes))
1523 {
1524 pop_function_context ();
1525 YYERROR1;
1526 }
1527 }
1528 old_style_parm_decls save_location
1529 { tree decl = current_function_decl;
1530 DECL_SOURCE_LOCATION (decl) = $4;
1531 store_parm_decls (); }
1532 /* This used to use compstmt_or_error. That caused a bug with
1533 input `f(g) int g {}', where the use of YYERROR1 above caused
1534 an error which then was handled by compstmt_or_error. There
1535 followed a repeated execution of that same rule, which called
1536 YYERROR1 again, and so on. */
1537 compstmt
1538 { tree decl = current_function_decl;
1539 add_stmt ($6);
1540 finish_function ();
1541 pop_function_context ();
1542 add_stmt (build_stmt (DECL_EXPR, decl)); }
1543 ;
1545 /* Any kind of declarator (thus, all declarators allowed
1546 after an explicit typespec). */
1548 declarator:
1549 after_type_declarator
1550 | notype_declarator
1551 ;
1553 /* A declarator that is allowed only after an explicit typespec. */
1555 after_type_declarator:
1556 '(' maybe_attribute after_type_declarator ')'
1557 { $$ = $2 ? build_attrs_declarator ($2, $3) : $3; }
1558 | after_type_declarator '(' parmlist_or_identifiers %prec '.'
1559 { $$ = build_function_declarator ($3, $1); }
1560 | after_type_declarator array_declarator %prec '.'
1561 { $$ = set_array_declarator_inner ($2, $1, false); }
1562 | '*' maybe_type_quals_attrs after_type_declarator %prec UNARY
1563 { $$ = make_pointer_declarator ($2, $3); }
1564 | TYPENAME
1565 { $$ = build_id_declarator ($1); }
1566 ;
1568 /* Kinds of declarator that can appear in a parameter list
1569 in addition to notype_declarator. This is like after_type_declarator
1570 but does not allow a typedef name in parentheses as an identifier
1571 (because it would conflict with a function with that typedef as arg). */
1572 parm_declarator:
1573 parm_declarator_starttypename
1574 | parm_declarator_nostarttypename
1575 ;
1577 parm_declarator_starttypename:
1578 parm_declarator_starttypename '(' parmlist_or_identifiers %prec '.'
1579 { $$ = build_function_declarator ($3, $1); }
1580 | parm_declarator_starttypename array_declarator %prec '.'
1581 { $$ = set_array_declarator_inner ($2, $1, false); }
1582 | TYPENAME
1583 { $$ = build_id_declarator ($1); }
1584 ;
1586 parm_declarator_nostarttypename:
1587 parm_declarator_nostarttypename '(' parmlist_or_identifiers %prec '.'
1588 { $$ = build_function_declarator ($3, $1); }
1589 | parm_declarator_nostarttypename array_declarator %prec '.'
1590 { $$ = set_array_declarator_inner ($2, $1, false); }
1591 | '*' maybe_type_quals_attrs parm_declarator_starttypename %prec UNARY
1592 { $$ = make_pointer_declarator ($2, $3); }
1593 | '*' maybe_type_quals_attrs parm_declarator_nostarttypename %prec UNARY
1594 { $$ = make_pointer_declarator ($2, $3); }
1595 | '(' maybe_attribute parm_declarator_nostarttypename ')'
1596 { $$ = $2 ? build_attrs_declarator ($2, $3) : $3; }
1597 ;
1599 /* A declarator allowed whether or not there has been
1600 an explicit typespec. These cannot redeclare a typedef-name. */
1602 notype_declarator:
1603 notype_declarator '(' parmlist_or_identifiers %prec '.'
1604 { $$ = build_function_declarator ($3, $1); }
1605 | '(' maybe_attribute notype_declarator ')'
1606 { $$ = $2 ? build_attrs_declarator ($2, $3) : $3; }
1607 | '*' maybe_type_quals_attrs notype_declarator %prec UNARY
1608 { $$ = make_pointer_declarator ($2, $3); }
1609 | notype_declarator array_declarator %prec '.'
1610 { $$ = set_array_declarator_inner ($2, $1, false); }
1611 | IDENTIFIER
1612 { $$ = build_id_declarator ($1); }
1613 ;
1615 struct_head:
1616 STRUCT
1617 { $$ = NULL_TREE; }
1618 | STRUCT attributes
1619 { $$ = $2; }
1620 ;
1622 union_head:
1623 UNION
1624 { $$ = NULL_TREE; }
1625 | UNION attributes
1626 { $$ = $2; }
1627 ;
1629 enum_head:
1630 ENUM
1631 { $$ = NULL_TREE; }
1632 | ENUM attributes
1633 { $$ = $2; }
1634 ;
1636 /* structsp_attr: struct/union/enum specifiers that either
1637 end with attributes, or are such that any following attributes would
1638 be parsed as part of the struct/union/enum specifier.
1640 structsp_nonattr: other struct/union/enum specifiers. */
1642 structsp_attr:
1643 struct_head identifier '{'
1644 { $<ttype>$ = start_struct (RECORD_TYPE, $2);
1645 /* Start scope of tag before parsing components. */
1646 }
1647 component_decl_list '}' maybe_attribute
1648 { $$.spec = finish_struct ($<ttype>4, nreverse ($5),
1649 chainon ($1, $7));
1650 $$.kind = ctsk_tagdef; }
1651 | struct_head '{' component_decl_list '}' maybe_attribute
1652 { $$.spec = finish_struct (start_struct (RECORD_TYPE,
1653 NULL_TREE),
1654 nreverse ($3), chainon ($1, $5));
1655 $$.kind = ctsk_tagdef;
1656 }
1657 | union_head identifier '{'
1658 { $<ttype>$ = start_struct (UNION_TYPE, $2); }
1659 component_decl_list '}' maybe_attribute
1660 { $$.spec = finish_struct ($<ttype>4, nreverse ($5),
1661 chainon ($1, $7));
1662 $$.kind = ctsk_tagdef; }
1663 | union_head '{' component_decl_list '}' maybe_attribute
1664 { $$.spec = finish_struct (start_struct (UNION_TYPE,
1665 NULL_TREE),
1666 nreverse ($3), chainon ($1, $5));
1667 $$.kind = ctsk_tagdef;
1668 }
1669 | enum_head identifier '{'
1670 { $<ttype>$ = start_enum ($2); }
1671 enumlist maybecomma_warn '}' maybe_attribute
1672 { $$.spec = finish_enum ($<ttype>4, nreverse ($5),
1673 chainon ($1, $8));
1674 $$.kind = ctsk_tagdef; }
1675 | enum_head '{'
1676 { $<ttype>$ = start_enum (NULL_TREE); }
1677 enumlist maybecomma_warn '}' maybe_attribute
1678 { $$.spec = finish_enum ($<ttype>3, nreverse ($4),
1679 chainon ($1, $7));
1680 $$.kind = ctsk_tagdef; }
1681 ;
1683 structsp_nonattr:
1684 struct_head identifier
1685 { $$ = parser_xref_tag (RECORD_TYPE, $2); }
1686 | union_head identifier
1687 { $$ = parser_xref_tag (UNION_TYPE, $2); }
1688 | enum_head identifier
1689 { $$ = parser_xref_tag (ENUMERAL_TYPE, $2);
1690 /* In ISO C, enumerated types can be referred to
1691 only if already defined. */
1692 if (pedantic && !COMPLETE_TYPE_P ($$.spec))
1693 pedwarn ("ISO C forbids forward references to %<enum%> types"); }
1694 ;
1696 maybecomma:
1697 /* empty */
1698 | ','
1699 ;
1701 maybecomma_warn:
1702 /* empty */
1703 | ','
1704 { if (pedantic && !flag_isoc99)
1705 pedwarn ("comma at end of enumerator list"); }
1706 ;
1708 /* We chain the components in reverse order. They are put in forward
1709 order in structsp_attr.
1711 Note that component_declarator returns single decls, so components
1712 and components_notype can use TREE_CHAIN directly, wheras components
1713 and components_notype return lists (of comma separated decls), so
1714 component_decl_list and component_decl_list2 must use chainon.
1716 The theory behind all this is that there will be more semicolon
1717 separated fields than comma separated fields, and so we'll be
1718 minimizing the number of node traversals required by chainon. */
1720 component_decl_list:
1721 component_decl_list2
1722 { $$ = $1; }
1723 | component_decl_list2 component_decl
1724 { $$ = chainon ($2, $1);
1725 pedwarn ("no semicolon at end of struct or union"); }
1726 ;
1728 component_decl_list2: /* empty */
1729 { $$ = NULL_TREE; }
1730 | component_decl_list2 component_decl ';'
1731 { $$ = chainon ($2, $1); }
1732 | component_decl_list2 ';'
1733 { if (pedantic)
1734 pedwarn ("extra semicolon in struct or union specified"); }
1735 @@ifobjc
1736 /* foo(sizeof(struct{ @defs(ClassName)})); */
1737 | AT_DEFS '(' CLASSNAME ')'
1738 { $$ = nreverse (objc_get_class_ivars ($3)); }
1739 @@end_ifobjc
1740 ;
1742 component_decl:
1743 declspecs_nosc_ts setspecs components
1744 { $$ = $3;
1745 POP_DECLSPEC_STACK; }
1746 | declspecs_nosc_ts setspecs
1747 {
1748 /* Support for unnamed structs or unions as members of
1749 structs or unions (which is [a] useful and [b] supports
1750 MS P-SDK). */
1751 $$ = grokfield (build_id_declarator (NULL_TREE),
1752 current_declspecs, NULL_TREE);
1753 POP_DECLSPEC_STACK; }
1754 | declspecs_nosc_nots setspecs components_notype
1755 { $$ = $3;
1756 POP_DECLSPEC_STACK; }
1757 | declspecs_nosc_nots
1758 { if (pedantic)
1759 pedwarn ("ISO C forbids member declarations with no members");
1760 shadow_tag_warned (finish_declspecs ($1), pedantic);
1761 $$ = NULL_TREE; }
1762 | error
1763 { $$ = NULL_TREE; }
1764 | extension component_decl
1765 { $$ = $2;
1766 RESTORE_EXT_FLAGS ($1); }
1767 ;
1769 components:
1770 component_declarator
1771 | components ',' maybe_resetattrs component_declarator
1772 { TREE_CHAIN ($4) = $1; $$ = $4; }
1773 ;
1775 components_notype:
1776 component_notype_declarator
1777 | components_notype ',' maybe_resetattrs component_notype_declarator
1778 { TREE_CHAIN ($4) = $1; $$ = $4; }
1779 ;
1781 component_declarator:
1782 declarator maybe_attribute
1783 { $$ = grokfield ($1, current_declspecs, NULL_TREE);
1784 decl_attributes (&$$,
1785 chainon ($2, all_prefix_attributes), 0); }
1786 | declarator ':' expr_no_commas maybe_attribute
1787 { $$ = grokfield ($1, current_declspecs, $3.value);
1788 decl_attributes (&$$,
1789 chainon ($4, all_prefix_attributes), 0); }
1790 | ':' expr_no_commas maybe_attribute
1791 { $$ = grokfield (build_id_declarator (NULL_TREE),
1792 current_declspecs, $2.value);
1793 decl_attributes (&$$,
1794 chainon ($3, all_prefix_attributes), 0); }
1795 ;
1797 component_notype_declarator:
1798 notype_declarator maybe_attribute
1799 { $$ = grokfield ($1, current_declspecs, NULL_TREE);
1800 decl_attributes (&$$,
1801 chainon ($2, all_prefix_attributes), 0); }
1802 | notype_declarator ':' expr_no_commas maybe_attribute
1803 { $$ = grokfield ($1, current_declspecs, $3.value);
1804 decl_attributes (&$$,
1805 chainon ($4, all_prefix_attributes), 0); }
1806 | ':' expr_no_commas maybe_attribute
1807 { $$ = grokfield (build_id_declarator (NULL_TREE),
1808 current_declspecs, $2.value);
1809 decl_attributes (&$$,
1810 chainon ($3, all_prefix_attributes), 0); }
1811 ;
1813 /* We chain the enumerators in reverse order.
1814 They are put in forward order in structsp_attr. */
1816 enumlist:
1817 enumerator
1818 | enumlist ',' enumerator
1819 { if ($1 == error_mark_node)
1820 $$ = $1;
1821 else
1822 TREE_CHAIN ($3) = $1, $$ = $3; }
1823 | error
1824 { $$ = error_mark_node; }
1825 ;
1828 enumerator:
1829 identifier
1830 { $$ = build_enumerator ($1, NULL_TREE); }
1831 | identifier '=' expr_no_commas
1832 { $$ = build_enumerator ($1, $3.value); }
1833 ;
1835 typename:
1836 declspecs_nosc
1837 { pending_xref_error ();
1838 $<dsptype>$ = finish_declspecs ($1); }
1839 absdcl
1840 { $$ = XOBNEW (&parser_obstack, struct c_type_name);
1841 $$->specs = $<dsptype>2;
1842 $$->declarator = $3; }
1843 ;
1845 absdcl: /* an absolute declarator */
1846 /* empty */
1847 { $$ = build_id_declarator (NULL_TREE); }
1848 | absdcl1
1849 ;
1851 absdcl_maybe_attribute: /* absdcl maybe_attribute, but not just attributes */
1852 /* empty */
1853 { $$ = build_c_parm (current_declspecs, all_prefix_attributes,
1854 build_id_declarator (NULL_TREE)); }
1855 | absdcl1
1856 { $$ = build_c_parm (current_declspecs, all_prefix_attributes,
1857 $1); }
1858 | absdcl1_noea attributes
1859 { $$ = build_c_parm (current_declspecs,
1860 chainon ($2, all_prefix_attributes),
1861 $1); }
1862 ;
1864 absdcl1: /* a nonempty absolute declarator */
1865 absdcl1_ea
1866 | absdcl1_noea
1867 ;
1869 absdcl1_noea:
1870 direct_absdcl1
1871 | '*' maybe_type_quals_attrs absdcl1_noea
1872 { $$ = make_pointer_declarator ($2, $3); }
1873 ;
1875 absdcl1_ea:
1876 '*' maybe_type_quals_attrs
1877 { $$ = make_pointer_declarator
1878 ($2, build_id_declarator (NULL_TREE)); }
1879 | '*' maybe_type_quals_attrs absdcl1_ea
1880 { $$ = make_pointer_declarator ($2, $3); }
1881 ;
1883 direct_absdcl1:
1884 '(' maybe_attribute absdcl1 ')'
1885 { $$ = $2 ? build_attrs_declarator ($2, $3) : $3; }
1886 | direct_absdcl1 '(' parmlist
1887 { $$ = build_function_declarator ($3, $1); }
1888 | direct_absdcl1 array_declarator
1889 { $$ = set_array_declarator_inner ($2, $1, true); }
1890 | '(' parmlist
1891 { $$ = build_function_declarator
1892 ($2, build_id_declarator (NULL_TREE)); }
1893 | array_declarator
1894 { $$ = set_array_declarator_inner
1895 ($1, build_id_declarator (NULL_TREE), true); }
1896 ;
1898 /* The [...] part of a declarator for an array type. */
1900 array_declarator:
1901 '[' maybe_type_quals_attrs expr_no_commas ']'
1902 { $$ = build_array_declarator ($3.value, $2, false, false); }
1903 | '[' maybe_type_quals_attrs ']'
1904 { $$ = build_array_declarator (NULL_TREE, $2, false, false); }
1905 | '[' maybe_type_quals_attrs '*' ']'
1906 { $$ = build_array_declarator (NULL_TREE, $2, false, true); }
1907 | '[' STATIC maybe_type_quals_attrs expr_no_commas ']'
1908 { $$ = build_array_declarator ($4.value, $3, true, false); }
1909 /* declspecs_nosc_nots is a synonym for type_quals_attrs. */
1910 | '[' declspecs_nosc_nots STATIC expr_no_commas ']'
1911 { $$ = build_array_declarator ($4.value, $2, true, false); }
1912 ;
1914 /* A nonempty series of declarations and statements (possibly followed by
1915 some labels) that can form the body of a compound statement.
1916 NOTE: we don't allow labels on declarations; this might seem like a
1917 natural extension, but there would be a conflict between attributes
1918 on the label and prefix attributes on the declaration. */
1920 stmts_and_decls:
1921 lineno_stmt_decl_or_labels_ending_stmt
1922 | lineno_stmt_decl_or_labels_ending_decl
1923 | lineno_stmt_decl_or_labels_ending_label
1924 {
1925 error ("label at end of compound statement");
1926 }
1927 | lineno_stmt_decl_or_labels_ending_error
1928 ;
1930 lineno_stmt_decl_or_labels_ending_stmt:
1931 lineno_stmt
1932 | lineno_stmt_decl_or_labels_ending_stmt lineno_stmt
1933 | lineno_stmt_decl_or_labels_ending_decl lineno_stmt
1934 | lineno_stmt_decl_or_labels_ending_label lineno_stmt
1935 | lineno_stmt_decl_or_labels_ending_error lineno_stmt
1936 ;
1938 lineno_stmt_decl_or_labels_ending_decl:
1939 lineno_decl
1940 | lineno_stmt_decl_or_labels_ending_stmt lineno_decl
1941 {
1942 if ((pedantic && !flag_isoc99)
1943 || warn_declaration_after_statement)
1944 pedwarn_c90 ("ISO C90 forbids mixed declarations and code");
1945 }
1946 | lineno_stmt_decl_or_labels_ending_decl lineno_decl
1947 | lineno_stmt_decl_or_labels_ending_error lineno_decl
1948 ;
1950 lineno_stmt_decl_or_labels_ending_label:
1951 lineno_label
1952 | lineno_stmt_decl_or_labels_ending_stmt lineno_label
1953 | lineno_stmt_decl_or_labels_ending_decl lineno_label
1954 | lineno_stmt_decl_or_labels_ending_label lineno_label
1955 | lineno_stmt_decl_or_labels_ending_error lineno_label
1956 ;
1958 lineno_stmt_decl_or_labels_ending_error:
1959 errstmt
1960 | lineno_stmt_decl_or_labels errstmt
1961 ;
1963 lineno_stmt_decl_or_labels:
1964 lineno_stmt_decl_or_labels_ending_stmt
1965 | lineno_stmt_decl_or_labels_ending_decl
1966 | lineno_stmt_decl_or_labels_ending_label
1967 | lineno_stmt_decl_or_labels_ending_error
1968 ;
1970 errstmt: error ';'
1971 ;
1973 /* Start and end blocks created for the new scopes of C99. */
1974 c99_block_start: /* empty */
1975 { $$ = c_begin_compound_stmt (flag_isoc99); }
1976 ;
1978 /* Read zero or more forward-declarations for labels
1979 that nested functions can jump to. */
1980 maybe_label_decls:
1981 /* empty */
1982 | label_decls
1983 { if (pedantic)
1984 pedwarn ("ISO C forbids label declarations"); }
1985 ;
1987 label_decls:
1988 label_decl
1989 | label_decls label_decl
1990 ;
1992 label_decl:
1993 LABEL identifiers_or_typenames ';'
1994 { tree link;
1995 for (link = $2; link; link = TREE_CHAIN (link))
1996 {
1997 tree label = declare_label (TREE_VALUE (link));
1998 C_DECLARED_LABEL_FLAG (label) = 1;
1999 add_stmt (build_stmt (DECL_EXPR, label));
2000 }
2001 }
2002 ;
2004 /* This is the body of a function definition.
2005 It causes syntax errors to ignore to the next openbrace. */
2006 compstmt_or_error:
2007 compstmt
2008 { add_stmt ($1); }
2009 | error compstmt
2010 ;
2012 compstmt_start: '{' { $$ = c_begin_compound_stmt (true); }
2013 ;
2015 compstmt_nostart: '}'
2016 | maybe_label_decls compstmt_contents_nonempty '}'
2017 ;
2019 compstmt_contents_nonempty:
2020 stmts_and_decls
2021 | error
2022 ;
2024 compstmt_primary_start:
2025 '(' '{'
2026 { if (cur_stmt_list == NULL)
2027 {
2028 error ("braced-group within expression allowed "
2029 "only inside a function");
2030 YYERROR;
2031 }
2032 $$ = c_begin_stmt_expr ();
2033 }
2034 ;
2036 compstmt: compstmt_start compstmt_nostart
2037 { $$ = c_end_compound_stmt ($1, true); }
2038 ;
2040 /* The forced readahead in here is because we might be at the end of a
2041 line, and the line and file won't be bumped until yylex absorbs the
2042 first token on the next line. */
2044 save_location:
2045 { if (yychar == YYEMPTY)
2046 yychar = YYLEX;
2047 $$ = input_location; }
2048 ;
2050 lineno_labels:
2051 /* empty */
2052 | lineno_labels lineno_label
2053 ;
2055 /* A labeled statement. In C99 it also generates an implicit block. */
2056 c99_block_lineno_labeled_stmt:
2057 c99_block_start lineno_labels lineno_stmt
2058 { $$ = c_end_compound_stmt ($1, flag_isoc99); }
2059 ;
2061 lineno_stmt:
2062 save_location stmt
2063 {
2064 /* Two cases cannot and do not have line numbers associated:
2065 If stmt is degenerate, such as "2;", then stmt is an
2066 INTEGER_CST, which cannot hold line numbers. But that's
2067 ok because the statement will either be changed to a
2068 MODIFY_EXPR during gimplification of the statement expr,
2069 or discarded. If stmt was compound, but without new
2070 variables, we will have skipped the creation of a BIND
2071 and will have a bare STATEMENT_LIST. But that's ok
2072 because (recursively) all of the component statments
2073 should already have line numbers assigned. */
2074 if ($2 && EXPR_P ($2))
2075 SET_EXPR_LOCATION ($2, $1);
2076 }
2077 ;
2079 lineno_label:
2080 save_location label
2081 { if ($2) SET_EXPR_LOCATION ($2, $1); }
2082 ;
2084 condition: save_location expr
2085 { $$ = lang_hooks.truthvalue_conversion ($2.value);
2086 if (EXPR_P ($$))
2087 SET_EXPR_LOCATION ($$, $1); }
2088 ;
2090 /* Implement -Wparenthesis by special casing IF statement directly nested
2091 within IF statement. This requires some amount of duplication of the
2092 productions under c99_block_lineno_labeled_stmt in order to work out.
2093 But it's still likely more maintainable than lots of state outside the
2094 parser... */
2096 if_statement_1:
2097 c99_block_start lineno_labels if_statement
2098 { $$ = c_end_compound_stmt ($1, flag_isoc99); }
2099 ;
2101 if_statement_2:
2102 c99_block_start lineno_labels ';'
2103 { if (extra_warnings)
2104 add_stmt (build (NOP_EXPR, NULL_TREE, NULL_TREE));
2105 $$ = c_end_compound_stmt ($1, flag_isoc99); }
2106 | c99_block_lineno_labeled_stmt
2107 ;
2109 if_statement:
2110 IF c99_block_start save_location '(' condition ')'
2111 if_statement_1 ELSE if_statement_2
2112 { c_finish_if_stmt ($3, $5, $7, $9, true);
2113 add_stmt (c_end_compound_stmt ($2, flag_isoc99)); }
2114 | IF c99_block_start save_location '(' condition ')'
2115 if_statement_2 ELSE if_statement_2
2116 { c_finish_if_stmt ($3, $5, $7, $9, false);
2117 add_stmt (c_end_compound_stmt ($2, flag_isoc99)); }
2118 | IF c99_block_start save_location '(' condition ')'
2119 if_statement_1 %prec IF
2120 { c_finish_if_stmt ($3, $5, $7, NULL, true);
2121 add_stmt (c_end_compound_stmt ($2, flag_isoc99)); }
2122 | IF c99_block_start save_location '(' condition ')'
2123 if_statement_2 %prec IF
2124 { c_finish_if_stmt ($3, $5, $7, NULL, false);
2125 add_stmt (c_end_compound_stmt ($2, flag_isoc99)); }
2126 ;
2128 start_break: /* empty */
2129 { $$ = c_break_label; c_break_label = NULL; }
2130 ;
2132 start_continue: /* empty */
2133 { $$ = c_cont_label; c_cont_label = NULL; }
2134 ;
2136 while_statement:
2137 WHILE c99_block_start save_location '(' condition ')'
2138 start_break start_continue c99_block_lineno_labeled_stmt
2139 { c_finish_loop ($3, $5, NULL, $9, c_break_label,
2140 c_cont_label, true);
2141 add_stmt (c_end_compound_stmt ($2, flag_isoc99));
2142 c_break_label = $7; c_cont_label = $8; }
2143 ;
2145 do_statement:
2146 DO c99_block_start save_location start_break start_continue
2147 c99_block_lineno_labeled_stmt WHILE
2148 { $<ttype>$ = c_break_label; c_break_label = $4; }
2149 { $<ttype>$ = c_cont_label; c_cont_label = $5; }
2150 '(' condition ')' ';'
2151 { c_finish_loop ($3, $11, NULL, $6, $<ttype>8,
2152 $<ttype>9, false);
2153 add_stmt (c_end_compound_stmt ($2, flag_isoc99)); }
2154 ;
2156 xexpr:
2157 /* empty */
2158 { $$ = NULL_TREE; }
2159 | expr
2160 { $$ = $1.value; }
2161 ;
2163 for_init_stmt:
2164 xexpr ';'
2165 { c_finish_expr_stmt ($1); }
2166 | decl
2167 { check_for_loop_decls (); }
2168 ;
2170 for_cond_expr: save_location xexpr
2171 { if ($2)
2172 {
2173 $$ = lang_hooks.truthvalue_conversion ($2);
2174 if (EXPR_P ($$))
2175 SET_EXPR_LOCATION ($$, $1);
2176 }
2177 else
2178 $$ = NULL;
2179 }
2180 ;
2182 for_incr_expr: xexpr
2183 { $$ = c_process_expr_stmt ($1); }
2184 ;
2186 for_statement:
2187 FOR c99_block_start '(' for_init_stmt
2188 save_location for_cond_expr ';' for_incr_expr ')'
2189 start_break start_continue c99_block_lineno_labeled_stmt
2190 { c_finish_loop ($5, $6, $8, $12, c_break_label,
2191 c_cont_label, true);
2192 add_stmt (c_end_compound_stmt ($2, flag_isoc99));
2193 c_break_label = $10; c_cont_label = $11; }
2194 ;
2196 switch_statement:
2197 SWITCH c99_block_start '(' expr ')'
2198 { $<ttype>$ = c_start_case ($4.value); }
2199 start_break c99_block_lineno_labeled_stmt
2200 { c_finish_case ($8);
2201 if (c_break_label)
2202 add_stmt (build (LABEL_EXPR, void_type_node,
2203 c_break_label));
2204 c_break_label = $7;
2205 add_stmt (c_end_compound_stmt ($2, flag_isoc99)); }
2206 ;
2208 /* Parse a single real statement, not including any labels or compounds. */
2209 stmt_nocomp:
2210 expr ';'
2211 { $$ = c_finish_expr_stmt ($1.value); }
2212 | if_statement
2213 { $$ = NULL_TREE; }
2214 | while_statement
2215 { $$ = NULL_TREE; }
2216 | do_statement
2217 { $$ = NULL_TREE; }
2218 | for_statement
2219 { $$ = NULL_TREE; }
2220 | switch_statement
2221 { $$ = NULL_TREE; }
2222 | BREAK ';'
2223 { $$ = c_finish_bc_stmt (&c_break_label, true); }
2224 | CONTINUE ';'
2225 { $$ = c_finish_bc_stmt (&c_cont_label, false); }
2226 | RETURN ';'
2227 { $$ = c_finish_return (NULL_TREE); }
2228 | RETURN expr ';'
2229 { $$ = c_finish_return ($2.value); }
2230 | asm_stmt
2231 | GOTO identifier ';'
2232 { $$ = c_finish_goto_label ($2); }
2233 | GOTO '*' expr ';'
2234 { $$ = c_finish_goto_ptr ($3.value); }
2235 | ';'
2236 { $$ = NULL_TREE; }
2237 @@ifobjc
2238 | AT_THROW expr ';'
2239 { $$ = objc_build_throw_stmt ($2.value); }
2240 | AT_THROW ';'
2241 { $$ = objc_build_throw_stmt (NULL_TREE); }
2242 | objc_try_catch_stmt
2243 { $$ = NULL_TREE; }
2244 | AT_SYNCHRONIZED save_location '(' expr ')' compstmt
2245 { objc_build_synchronized ($2, $4.value, $6); $$ = NULL_TREE; }
2246 ;
2248 objc_catch_prefix:
2249 AT_CATCH '(' parm ')'
2250 { objc_begin_catch_clause (grokparm ($3)); }
2251 ;
2253 objc_catch_clause:
2254 objc_catch_prefix '{' compstmt_nostart
2255 { objc_finish_catch_clause (); }
2256 | objc_catch_prefix '{' error '}'
2257 { objc_finish_catch_clause (); }
2258 ;
2260 objc_opt_catch_list:
2261 /* empty */
2262 | objc_opt_catch_list objc_catch_clause
2263 ;
2265 objc_try_catch_clause:
2266 AT_TRY save_location compstmt
2267 { objc_begin_try_stmt ($2, $3); }
2268 objc_opt_catch_list
2269 ;
2271 objc_finally_clause:
2272 AT_FINALLY save_location compstmt
2273 { objc_build_finally_clause ($2, $3); }
2274 ;
2276 objc_try_catch_stmt:
2277 objc_try_catch_clause
2278 { objc_finish_try_stmt (); }
2279 | objc_try_catch_clause objc_finally_clause
2280 { objc_finish_try_stmt (); }
2281 @@end_ifobjc
2282 ;
2284 /* Parse a single or compound real statement, not including any labels. */
2285 stmt:
2286 compstmt
2287 { add_stmt ($1); $$ = NULL_TREE; }
2288 | stmt_nocomp
2289 ;
2291 /* Any kind of label, including jump labels and case labels.
2292 ANSI C accepts labels only before statements, but we allow them
2293 also at the end of a compound statement. */
2295 label: CASE expr_no_commas ':'
2296 { $$ = do_case ($2.value, NULL_TREE); }
2297 | CASE expr_no_commas ELLIPSIS expr_no_commas ':'
2298 { $$ = do_case ($2.value, $4.value); }
2299 | DEFAULT ':'
2300 { $$ = do_case (NULL_TREE, NULL_TREE); }
2301 | identifier save_location ':' maybe_attribute
2302 { tree label = define_label ($2, $1);
2303 if (label)
2304 {
2305 decl_attributes (&label, $4, 0);
2306 $$ = add_stmt (build_stmt (LABEL_EXPR, label));
2307 }
2308 else
2309 $$ = NULL_TREE;
2310 }
2311 ;
2313 /* Asm expressions and statements */
2315 /* simple_asm_expr is used in restricted contexts, where a full
2316 expression with inputs and outputs does not make sense. */
2317 simple_asm_expr:
2318 ASM_KEYWORD stop_string_translation
2319 '(' STRING ')' start_string_translation
2320 { $$ = $4; }
2321 ;
2323 /* maybeasm: used for assembly names for declarations */
2324 maybeasm:
2325 /* empty */
2326 { $$ = NULL_TREE; }
2327 | simple_asm_expr
2328 ;
2330 /* asmdef: asm() outside a function body. */
2331 asmdef:
2332 simple_asm_expr ';'
2333 { assemble_asm ($1); }
2334 | ASM_KEYWORD error start_string_translation ';'
2335 {}
2336 ;
2338 /* Full-blown asm statement with inputs, outputs, clobbers, and
2339 volatile tag allowed. */
2340 asm_stmt:
2341 ASM_KEYWORD maybe_volatile stop_string_translation
2342 '(' asm_argument ')' start_string_translation ';'
2343 { $$ = build_asm_stmt ($2, $5); }
2344 ;
2346 asm_argument:
2347 /* no operands */
2348 STRING
2349 { $$ = build_asm_expr ($1, 0, 0, 0, true); }
2350 /* output operands */
2351 | STRING ':' asm_operands
2352 { $$ = build_asm_expr ($1, $3, 0, 0, false); }
2353 /* output and input operands */
2354 | STRING ':' asm_operands ':' asm_operands
2355 { $$ = build_asm_expr ($1, $3, $5, 0, false); }
2356 /* output and input operands and clobbers */
2357 | STRING ':' asm_operands ':' asm_operands ':' asm_clobbers
2358 { $$ = build_asm_expr ($1, $3, $5, $7, false); }
2359 ;
2361 /* Either 'volatile' or nothing. First thing in an `asm' statement. */
2363 maybe_volatile:
2364 /* empty */
2365 { $$ = 0; }
2366 | TYPE_QUAL
2367 { if ($1 != ridpointers[RID_VOLATILE])
2368 {
2369 warning ("%E qualifier ignored on asm", $1);
2370 $$ = 0;
2371 }
2372 else
2373 $$ = $1;
2374 }
2375 ;
2377 /* These are the operands other than the first string and colon
2378 in asm ("addextend %2,%1": "=dm" (x), "0" (y), "g" (*x)) */
2379 asm_operands: /* empty */
2380 { $$ = NULL_TREE; }
2381 | nonnull_asm_operands
2382 ;
2384 nonnull_asm_operands:
2385 asm_operand
2386 | nonnull_asm_operands ',' asm_operand
2387 { $$ = chainon ($1, $3); }
2388 ;
2390 asm_operand:
2391 STRING start_string_translation '(' expr ')' stop_string_translation
2392 { $$ = build_tree_list (build_tree_list (NULL_TREE, $1),
2393 $4.value); }
2394 | '[' identifier ']' STRING start_string_translation
2395 '(' expr ')' stop_string_translation
2396 { $2 = build_string (IDENTIFIER_LENGTH ($2),
2397 IDENTIFIER_POINTER ($2));
2398 $$ = build_tree_list (build_tree_list ($2, $4), $7.value); }
2399 ;
2401 asm_clobbers:
2402 STRING
2403 { $$ = tree_cons (NULL_TREE, $1, NULL_TREE); }
2404 | asm_clobbers ',' STRING
2405 { $$ = tree_cons (NULL_TREE, $3, $1); }
2406 ;
2408 stop_string_translation:
2409 { c_lex_string_translate = 0; }
2410 ;
2412 start_string_translation:
2413 { c_lex_string_translate = 1; }
2414 ;
2416 \f
2417 /* This is what appears inside the parens in a function declarator.
2418 Its value is a list of ..._TYPE nodes. Attributes must appear here
2419 to avoid a conflict with their appearance after an open parenthesis
2420 in an abstract declarator, as in
2421 "void bar (int (__attribute__((__mode__(SI))) int foo));". */
2422 parmlist:
2423 maybe_attribute
2424 { push_scope ();
2425 declare_parm_level (); }
2426 parmlist_1
2427 { $$ = $3;
2428 pop_scope (); }
2429 ;
2431 parmlist_1:
2432 parmlist_2 ')'
2433 | parms ';'
2434 { mark_forward_parm_decls (); }
2435 maybe_attribute
2436 { /* Dummy action so attributes are in known place
2437 on parser stack. */ }
2438 parmlist_1
2439 { $$ = $6; }
2440 | error ')'
2441 { $$ = XOBNEW (&parser_obstack, struct c_arg_info);
2442 $$->parms = 0;
2443 $$->tags = 0;
2444 $$->types = 0;
2445 $$->others = 0; }
2446 ;
2448 /* This is what appears inside the parens in a function declarator.
2449 Its value is represented in the format that grokdeclarator expects. */
2450 parmlist_2: /* empty */
2451 { $$ = XOBNEW (&parser_obstack, struct c_arg_info);
2452 $$->parms = 0;
2453 $$->tags = 0;
2454 $$->types = 0;
2455 $$->others = 0; }
2456 | ELLIPSIS
2457 { $$ = XOBNEW (&parser_obstack, struct c_arg_info);
2458 $$->parms = 0;
2459 $$->tags = 0;
2460 $$->others = 0;
2461 /* Suppress -Wold-style-definition for this case. */
2462 $$->types = error_mark_node;
2463 error ("ISO C requires a named argument before %<...%>");
2464 }
2465 | parms
2466 { $$ = get_parm_info (/*ellipsis=*/false); }
2467 | parms ',' ELLIPSIS
2468 { $$ = get_parm_info (/*ellipsis=*/true); }
2469 ;
2471 parms:
2472 firstparm
2473 { push_parm_decl ($1); }
2474 | parms ',' parm
2475 { push_parm_decl ($3); }
2476 ;
2478 /* A single parameter declaration or parameter type name,
2479 as found in a parmlist. */
2480 parm:
2481 declspecs_ts setspecs parm_declarator maybe_attribute
2482 { $$ = build_c_parm (current_declspecs,
2483 chainon ($4, all_prefix_attributes), $3);
2484 POP_DECLSPEC_STACK; }
2485 | declspecs_ts setspecs notype_declarator maybe_attribute
2486 { $$ = build_c_parm (current_declspecs,
2487 chainon ($4, all_prefix_attributes), $3);
2488 POP_DECLSPEC_STACK; }
2489 | declspecs_ts setspecs absdcl_maybe_attribute
2490 { $$ = $3;
2491 POP_DECLSPEC_STACK; }
2492 | declspecs_nots setspecs notype_declarator maybe_attribute
2493 { $$ = build_c_parm (current_declspecs,
2494 chainon ($4, all_prefix_attributes), $3);
2495 POP_DECLSPEC_STACK; }
2497 | declspecs_nots setspecs absdcl_maybe_attribute
2498 { $$ = $3;
2499 POP_DECLSPEC_STACK; }
2500 ;
2502 /* The first parm, which must suck attributes from off the top of the parser
2503 stack. */
2504 firstparm:
2505 declspecs_ts_nosa setspecs_fp parm_declarator maybe_attribute
2506 { $$ = build_c_parm (current_declspecs,
2507 chainon ($4, all_prefix_attributes), $3);
2508 POP_DECLSPEC_STACK; }
2509 | declspecs_ts_nosa setspecs_fp notype_declarator maybe_attribute
2510 { $$ = build_c_parm (current_declspecs,
2511 chainon ($4, all_prefix_attributes), $3);
2512 POP_DECLSPEC_STACK; }
2513 | declspecs_ts_nosa setspecs_fp absdcl_maybe_attribute
2514 { $$ = $3;
2515 POP_DECLSPEC_STACK; }
2516 | declspecs_nots_nosa setspecs_fp notype_declarator maybe_attribute
2517 { $$ = build_c_parm (current_declspecs,
2518 chainon ($4, all_prefix_attributes), $3);
2519 POP_DECLSPEC_STACK; }
2521 | declspecs_nots_nosa setspecs_fp absdcl_maybe_attribute
2522 { $$ = $3;
2523 POP_DECLSPEC_STACK; }
2524 ;
2526 setspecs_fp:
2527 setspecs
2528 { prefix_attributes = chainon (prefix_attributes, $<ttype>-2);
2529 all_prefix_attributes = prefix_attributes; }
2530 ;
2532 /* This is used in a function definition
2533 where either a parmlist or an identifier list is ok.
2534 Its value is a list of ..._TYPE nodes or a list of identifiers. */
2535 parmlist_or_identifiers:
2536 maybe_attribute
2537 { push_scope ();
2538 declare_parm_level (); }
2539 parmlist_or_identifiers_1
2540 { $$ = $3;
2541 pop_scope (); }
2542 ;
2544 parmlist_or_identifiers_1:
2545 parmlist_1
2546 | identifiers ')'
2547 { $$ = XOBNEW (&parser_obstack, struct c_arg_info);
2548 $$->parms = 0;
2549 $$->tags = 0;
2550 $$->types = $1;
2551 $$->others = 0;
2553 /* Make sure we have a parmlist after attributes. */
2554 if ($<ttype>-1 != 0)
2555 YYERROR1;
2556 }
2557 ;
2559 /* A nonempty list of identifiers. */
2560 identifiers:
2561 IDENTIFIER
2562 { $$ = build_tree_list (NULL_TREE, $1); }
2563 | identifiers ',' IDENTIFIER
2564 { $$ = chainon ($1, build_tree_list (NULL_TREE, $3)); }
2565 ;
2567 /* A nonempty list of identifiers, including typenames. */
2568 identifiers_or_typenames:
2569 identifier
2570 { $$ = build_tree_list (NULL_TREE, $1); }
2571 | identifiers_or_typenames ',' identifier
2572 { $$ = chainon ($1, build_tree_list (NULL_TREE, $3)); }
2573 ;
2575 extension:
2576 EXTENSION
2577 { $$ = SAVE_EXT_FLAGS ();
2578 pedantic = 0;
2579 warn_pointer_arith = 0;
2580 warn_traditional = 0;
2581 flag_iso = 0; }
2582 ;
2583 \f
2584 @@ifobjc
2585 /* Objective-C productions. */
2587 objcdef:
2588 classdef
2589 | classdecl
2590 | aliasdecl
2591 | protocoldef
2592 | methoddef
2593 | AT_END
2594 {
2595 objc_finish_implementation ();
2596 }
2597 ;
2599 /* A nonempty list of identifiers. */
2600 identifier_list:
2601 identifier
2602 { $$ = build_tree_list (NULL_TREE, $1); }
2603 | identifier_list ',' identifier
2604 { $$ = chainon ($1, build_tree_list (NULL_TREE, $3)); }
2605 ;
2607 classdecl:
2608 AT_CLASS identifier_list ';'
2609 {
2610 objc_declare_class ($2);
2611 }
2612 ;
2614 aliasdecl:
2615 AT_ALIAS identifier identifier ';'
2616 {
2617 objc_declare_alias ($2, $3);
2618 }
2619 ;
2621 superclass:
2622 ':' identifier { $$ = $2; }
2623 | /* NULL */ %prec HYPERUNARY { $$ = NULL_TREE; }
2624 ;
2626 class_ivars:
2627 '{' ivar_decl_list '}'
2628 | /* NULL */
2629 ;
2631 classdef:
2632 AT_INTERFACE identifier superclass protocolrefs
2633 {
2634 objc_start_class_interface ($2, $3, $4);
2635 }
2636 class_ivars
2637 {
2638 objc_continue_interface ();
2639 }
2640 methodprotolist AT_END
2641 {
2642 objc_finish_interface ();
2643 }
2645 | AT_IMPLEMENTATION identifier superclass
2646 {
2647 objc_start_class_implementation ($2, $3);
2648 }
2649 class_ivars
2650 {
2651 objc_continue_implementation ();
2652 }
2654 | AT_INTERFACE identifier '(' identifier ')' protocolrefs
2655 {
2656 objc_start_category_interface ($2, $4, $6);
2657 }
2658 methodprotolist AT_END
2659 {
2660 objc_finish_interface ();
2661 }
2663 | AT_IMPLEMENTATION identifier '(' identifier ')'
2664 {
2665 objc_start_category_implementation ($2, $4);
2666 }
2667 ;
2669 protocoldef:
2670 AT_PROTOCOL identifier protocolrefs
2671 {
2672 objc_pq_context = 1;
2673 objc_start_protocol ($2, $3);
2674 }
2675 methodprotolist AT_END
2676 {
2677 objc_pq_context = 0;
2678 objc_finish_interface ();
2679 }
2680 /* The @protocol forward-declaration production introduces a
2681 reduce/reduce conflict on ';', which should be resolved in
2682 favor of the production 'identifier_list -> identifier'. */
2683 | AT_PROTOCOL identifier_list ';'
2684 {
2685 objc_declare_protocols ($2);
2686 }
2687 ;
2689 protocolrefs:
2690 /* empty */
2691 {
2692 $$ = NULL_TREE;
2693 }
2694 | non_empty_protocolrefs
2695 ;
2697 non_empty_protocolrefs:
2698 ARITHCOMPARE identifier_list ARITHCOMPARE
2699 {
2700 if ($1 == LT_EXPR && $3 == GT_EXPR)
2701 $$ = $2;
2702 else
2703 YYERROR1;
2704 }
2705 ;
2707 ivar_decl_list:
2708 /* empty */
2709 | ivar_decl_list visibility_spec ivar_decls
2710 ;
2712 visibility_spec:
2713 /* empty */
2714 | AT_PRIVATE { objc_set_visibility (2); }
2715 | AT_PROTECTED { objc_set_visibility (0); }
2716 | AT_PUBLIC { objc_set_visibility (1); }
2717 ;
2719 ivar_decls:
2720 /* empty */
2721 | ivar_decls ivar_decl ';'
2722 | ivar_decls ';'
2723 {
2724 if (pedantic)
2725 pedwarn ("extra semicolon in struct or union specified");
2726 }
2727 ;
2729 ivar_decl:
2730 component_decl
2731 {
2732 /* Comma-separated ivars are chained together in
2733 reverse order; add them one by one. */
2734 tree ivar = nreverse ($1);
2736 for (; ivar; ivar = TREE_CHAIN (ivar))
2737 objc_add_instance_variable (copy_node (ivar));
2738 }
2739 ;
2741 opt_semi:
2742 /* NULL */
2743 | ';'
2744 {
2745 if (pedantic)
2746 pedwarn ("extra semicolon in method definition specified");
2747 }
2748 ;
2750 methodtype:
2751 '+'
2752 | '-'
2753 ;
2755 methoddef:
2756 methodtype
2757 {
2758 objc_set_method_type ($1);
2759 objc_pq_context = 1;
2760 }
2761 methoddecl opt_semi
2762 {
2763 objc_pq_context = 0;
2764 objc_start_method_definition ($3);
2765 }
2766 compstmt_or_error
2767 {
2768 objc_finish_method_definition (current_function_decl);
2769 }
2770 ;
2772 /* the reason for the strange actions in this rule
2773 is so that notype_initdecls when reached via datadef
2774 can find a valid list of type and sc specs in $0. */
2776 methodprotolist:
2777 /* empty */
2778 | methodprotolist methodproto
2779 | methodprotolist { $<ttype>$ = NULL_TREE; } datadef
2780 ;
2782 semi_or_error:
2783 ';'
2784 | error
2785 ;
2787 methodproto:
2788 methodtype
2789 {
2790 objc_set_method_type ($1);
2791 /* Remember protocol qualifiers in prototypes. */
2792 objc_pq_context = 1;
2793 }
2794 methoddecl
2795 {
2796 /* Forget protocol qualifiers here. */
2797 objc_pq_context = 0;
2798 objc_add_method_declaration ($3);
2799 }
2800 semi_or_error
2801 ;
2803 methoddecl:
2804 '(' objc_typename ')' unaryselector
2805 {
2806 $$ = objc_build_method_signature ($2, $4, NULL_TREE);
2807 }
2809 | unaryselector
2810 {
2811 $$ = objc_build_method_signature (NULL_TREE, $1, NULL_TREE);
2812 }
2814 | '(' objc_typename ')' keywordselector optparmlist
2815 {
2816 $$ = objc_build_method_signature ($2, $4, $5);
2817 }
2819 | keywordselector optparmlist
2820 {
2821 $$ = objc_build_method_signature (NULL_TREE, $1, $2);
2822 }
2823 ;
2825 /* Optional ObjC method parameters follow the C syntax, and may include '...'
2826 to denote a variable number of arguments. */
2828 optparmlist:
2829 optparms optellipsis
2830 {
2831 TREE_OVERFLOW ($$) = $2;
2832 }
2833 ;
2835 optparms:
2836 /* NULL */
2837 {
2838 $$ = make_node (TREE_LIST);
2839 }
2840 | optparms ',' parm
2841 {
2842 $$ = chainon ($1, build_tree_list (NULL_TREE,
2843 grokparm ($3)));
2844 }
2845 ;
2847 optellipsis:
2848 /* NULL */
2849 {
2850 $$ = 0;
2851 }
2852 | ',' ELLIPSIS
2853 {
2854 $$ = 1;
2855 }
2856 ;
2858 unaryselector:
2859 selector
2860 ;
2862 keywordselector:
2863 keyworddecl
2865 | keywordselector keyworddecl
2866 {
2867 $$ = chainon ($1, $2);
2868 }
2869 ;
2871 selector:
2872 IDENTIFIER
2873 | TYPENAME
2874 | CLASSNAME
2875 | reservedwords
2876 ;
2878 reservedwords:
2879 ENUM | STRUCT | UNION | IF | ELSE | WHILE | DO | FOR
2880 | SWITCH | CASE | DEFAULT | BREAK | CONTINUE | RETURN
2881 | GOTO | ASM_KEYWORD | SIZEOF | TYPEOF | ALIGNOF
2882 | TYPESPEC | TYPE_QUAL | OBJC_TYPE_QUAL
2883 ;
2885 objc_qual:
2886 OBJC_TYPE_QUAL
2887 ;
2889 objc_quals:
2890 objc_quals objc_qual
2891 {
2892 $$ = chainon ($1, build_tree_list (NULL_TREE, $2));
2893 }
2894 | /* NULL */
2895 {
2896 $$ = NULL_TREE;
2897 }
2898 ;
2900 objc_typename:
2901 objc_quals typename
2902 {
2903 $$ = build_tree_list ($1, groktypename ($2));
2904 }
2905 | objc_quals
2906 {
2907 $$ = build_tree_list ($1, NULL_TREE);
2908 }
2909 ;
2911 keyworddecl:
2912 selector ':' '(' objc_typename ')' identifier
2913 {
2914 $$ = objc_build_keyword_decl ($1, $4, $6);
2915 }
2917 | selector ':' identifier
2918 {
2919 $$ = objc_build_keyword_decl ($1, NULL_TREE, $3);
2920 }
2922 | ':' '(' objc_typename ')' identifier
2923 {
2924 $$ = objc_build_keyword_decl (NULL_TREE, $3, $5);
2925 }
2927 | ':' identifier
2928 {
2929 $$ = objc_build_keyword_decl (NULL_TREE, NULL_TREE, $2);
2930 }
2931 ;
2933 messageargs:
2934 selector
2935 | keywordarglist
2936 ;
2938 keywordarglist:
2939 keywordarg
2940 | keywordarglist keywordarg
2941 {
2942 $$ = chainon ($1, $2);
2943 }
2944 ;
2947 keywordexpr:
2948 nonnull_exprlist
2949 {
2950 if (TREE_CHAIN ($1) == NULL_TREE)
2951 /* just return the expr., remove a level of indirection */
2952 $$ = TREE_VALUE ($1);
2953 else
2954 /* we have a comma expr., we will collapse later */
2955 $$ = $1;
2956 }
2957 ;
2959 keywordarg:
2960 selector ':' keywordexpr
2961 {
2962 $$ = build_tree_list ($1, $3);
2963 }
2964 | ':' keywordexpr
2965 {
2966 $$ = build_tree_list (NULL_TREE, $2);
2967 }
2968 ;
2970 receiver:
2971 expr
2972 { $$ = $1.value; }
2973 | CLASSNAME
2974 {
2975 $$ = objc_get_class_reference ($1);
2976 }
2977 | TYPENAME
2978 {
2979 $$ = objc_get_class_reference ($1);
2980 }
2981 ;
2983 objcmessageexpr:
2984 '[' receiver messageargs ']'
2985 { $$ = build_tree_list ($2, $3); }
2986 ;
2988 selectorarg:
2989 selector
2990 | keywordnamelist
2991 ;
2993 keywordnamelist:
2994 keywordname
2995 | keywordnamelist keywordname
2996 {
2997 $$ = chainon ($1, $2);
2998 }
2999 ;
3001 keywordname:
3002 selector ':'
3003 {
3004 $$ = build_tree_list ($1, NULL_TREE);
3005 }
3006 | ':'
3007 {
3008 $$ = build_tree_list (NULL_TREE, NULL_TREE);
3009 }
3010 ;
3012 objcselectorexpr:
3013 AT_SELECTOR '(' selectorarg ')'
3014 {
3015 $$ = $3;
3016 }
3017 ;
3019 objcprotocolexpr:
3020 AT_PROTOCOL '(' identifier ')'
3021 {
3022 $$ = $3;
3023 }
3024 ;
3026 /* extension to support C-structures in the archiver */
3028 objcencodeexpr:
3029 AT_ENCODE '(' typename ')'
3030 {
3031 $$ = groktypename ($3);
3032 }
3033 ;
3035 @@end_ifobjc
3036 %%
3038 /* yylex() is a thin wrapper around c_lex(), all it does is translate
3039 cpplib.h's token codes into yacc's token codes. */
3041 static enum cpp_ttype last_token;
3043 /* The reserved keyword table. */
3044 struct resword
3045 {
3046 const char *word;
3047 ENUM_BITFIELD(rid) rid : 16;
3048 unsigned int disable : 16;
3049 };
3051 /* Disable mask. Keywords are disabled if (reswords[i].disable & mask) is
3052 _true_. */
3053 #define D_C89 0x01 /* not in C89 */
3054 #define D_EXT 0x02 /* GCC extension */
3055 #define D_EXT89 0x04 /* GCC extension incorporated in C99 */
3056 #define D_OBJC 0x08 /* Objective C only */
3058 static const struct resword reswords[] =
3059 {
3060 { "_Bool", RID_BOOL, 0 },
3061 { "_Complex", RID_COMPLEX, 0 },
3062 { "__FUNCTION__", RID_FUNCTION_NAME, 0 },
3063 { "__PRETTY_FUNCTION__", RID_PRETTY_FUNCTION_NAME, 0 },
3064 { "__alignof", RID_ALIGNOF, 0 },
3065 { "__alignof__", RID_ALIGNOF, 0 },
3066 { "__asm", RID_ASM, 0 },
3067 { "__asm__", RID_ASM, 0 },
3068 { "__attribute", RID_ATTRIBUTE, 0 },
3069 { "__attribute__", RID_ATTRIBUTE, 0 },
3070 { "__builtin_choose_expr", RID_CHOOSE_EXPR, 0 },
3071 { "__builtin_offsetof", RID_OFFSETOF, 0 },
3072 { "__builtin_types_compatible_p", RID_TYPES_COMPATIBLE_P, 0 },
3073 { "__builtin_va_arg", RID_VA_ARG, 0 },
3074 { "__complex", RID_COMPLEX, 0 },
3075 { "__complex__", RID_COMPLEX, 0 },
3076 { "__const", RID_CONST, 0 },
3077 { "__const__", RID_CONST, 0 },
3078 { "__extension__", RID_EXTENSION, 0 },
3079 { "__func__", RID_C99_FUNCTION_NAME, 0 },
3080 { "__imag", RID_IMAGPART, 0 },
3081 { "__imag__", RID_IMAGPART, 0 },
3082 { "__inline", RID_INLINE, 0 },
3083 { "__inline__", RID_INLINE, 0 },
3084 { "__label__", RID_LABEL, 0 },
3085 { "__real", RID_REALPART, 0 },
3086 { "__real__", RID_REALPART, 0 },
3087 { "__restrict", RID_RESTRICT, 0 },
3088 { "__restrict__", RID_RESTRICT, 0 },
3089 { "__signed", RID_SIGNED, 0 },
3090 { "__signed__", RID_SIGNED, 0 },
3091 { "__thread", RID_THREAD, 0 },
3092 { "__typeof", RID_TYPEOF, 0 },
3093 { "__typeof__", RID_TYPEOF, 0 },
3094 { "__volatile", RID_VOLATILE, 0 },
3095 { "__volatile__", RID_VOLATILE, 0 },
3096 { "asm", RID_ASM, D_EXT },
3097 { "auto", RID_AUTO, 0 },
3098 { "break", RID_BREAK, 0 },
3099 { "case", RID_CASE, 0 },
3100 { "char", RID_CHAR, 0 },
3101 { "const", RID_CONST, 0 },
3102 { "continue", RID_CONTINUE, 0 },
3103 { "default", RID_DEFAULT, 0 },
3104 { "do", RID_DO, 0 },
3105 { "double", RID_DOUBLE, 0 },
3106 { "else", RID_ELSE, 0 },
3107 { "enum", RID_ENUM, 0 },
3108 { "extern", RID_EXTERN, 0 },
3109 { "float", RID_FLOAT, 0 },
3110 { "for", RID_FOR, 0 },
3111 { "goto", RID_GOTO, 0 },
3112 { "if", RID_IF, 0 },
3113 { "inline", RID_INLINE, D_EXT89 },
3114 { "int", RID_INT, 0 },
3115 { "long", RID_LONG, 0 },
3116 { "register", RID_REGISTER, 0 },
3117 { "restrict", RID_RESTRICT, D_C89 },
3118 { "return", RID_RETURN, 0 },
3119 { "short", RID_SHORT, 0 },
3120 { "signed", RID_SIGNED, 0 },
3121 { "sizeof", RID_SIZEOF, 0 },
3122 { "static", RID_STATIC, 0 },
3123 { "struct", RID_STRUCT, 0 },
3124 { "switch", RID_SWITCH, 0 },
3125 { "typedef", RID_TYPEDEF, 0 },
3126 { "typeof", RID_TYPEOF, D_EXT },
3127 { "union", RID_UNION, 0 },
3128 { "unsigned", RID_UNSIGNED, 0 },
3129 { "void", RID_VOID, 0 },
3130 { "volatile", RID_VOLATILE, 0 },
3131 { "while", RID_WHILE, 0 },
3133 @@ifobjc
3135 /* These objc keywords are recognized only immediately after
3136 an '@'. */
3137 { "class", RID_AT_CLASS, D_OBJC },
3138 { "compatibility_alias", RID_AT_ALIAS, D_OBJC },
3139 { "defs", RID_AT_DEFS, D_OBJC },
3140 { "encode", RID_AT_ENCODE, D_OBJC },
3141 { "end", RID_AT_END, D_OBJC },
3142 { "implementation", RID_AT_IMPLEMENTATION, D_OBJC },
3143 { "interface", RID_AT_INTERFACE, D_OBJC },
3144 { "private", RID_AT_PRIVATE, D_OBJC },
3145 { "protected", RID_AT_PROTECTED, D_OBJC },
3146 { "protocol", RID_AT_PROTOCOL, D_OBJC },
3147 { "public", RID_AT_PUBLIC, D_OBJC },
3148 { "selector", RID_AT_SELECTOR, D_OBJC },
3149 { "throw", RID_AT_THROW, D_OBJC },
3150 { "try", RID_AT_TRY, D_OBJC },
3151 { "catch", RID_AT_CATCH, D_OBJC },
3152 { "finally", RID_AT_FINALLY, D_OBJC },
3153 { "synchronized", RID_AT_SYNCHRONIZED, D_OBJC },
3154 /* These are recognized only in protocol-qualifier context
3155 (see above) */
3156 { "bycopy", RID_BYCOPY, D_OBJC },
3157 { "byref", RID_BYREF, D_OBJC },
3158 { "in", RID_IN, D_OBJC },
3159 { "inout", RID_INOUT, D_OBJC },
3160 { "oneway", RID_ONEWAY, D_OBJC },
3161 { "out", RID_OUT, D_OBJC },
3162 @@end_ifobjc
3163 };
3164 #define N_reswords (sizeof reswords / sizeof (struct resword))
3166 /* Table mapping from RID_* constants to yacc token numbers.
3167 Unfortunately we have to have entries for all the keywords in all
3168 three languages. */
3169 static const short rid_to_yy[RID_MAX] =
3170 {
3171 /* RID_STATIC */ STATIC,
3172 /* RID_UNSIGNED */ TYPESPEC,
3173 /* RID_LONG */ TYPESPEC,
3174 /* RID_CONST */ TYPE_QUAL,
3175 /* RID_EXTERN */ SCSPEC,
3176 /* RID_REGISTER */ SCSPEC,
3177 /* RID_TYPEDEF */ SCSPEC,
3178 /* RID_SHORT */ TYPESPEC,
3179 /* RID_INLINE */ SCSPEC,
3180 /* RID_VOLATILE */ TYPE_QUAL,
3181 /* RID_SIGNED */ TYPESPEC,
3182 /* RID_AUTO */ SCSPEC,
3183 /* RID_RESTRICT */ TYPE_QUAL,
3185 /* C extensions */
3186 /* RID_COMPLEX */ TYPESPEC,
3187 /* RID_THREAD */ SCSPEC,
3189 /* C++ */
3190 /* RID_FRIEND */ 0,
3191 /* RID_VIRTUAL */ 0,
3192 /* RID_EXPLICIT */ 0,
3193 /* RID_EXPORT */ 0,
3194 /* RID_MUTABLE */ 0,
3196 /* ObjC */
3197 /* RID_IN */ OBJC_TYPE_QUAL,
3198 /* RID_OUT */ OBJC_TYPE_QUAL,
3199 /* RID_INOUT */ OBJC_TYPE_QUAL,
3200 /* RID_BYCOPY */ OBJC_TYPE_QUAL,
3201 /* RID_BYREF */ OBJC_TYPE_QUAL,
3202 /* RID_ONEWAY */ OBJC_TYPE_QUAL,
3204 /* C */
3205 /* RID_INT */ TYPESPEC,
3206 /* RID_CHAR */ TYPESPEC,
3207 /* RID_FLOAT */ TYPESPEC,
3208 /* RID_DOUBLE */ TYPESPEC,
3209 /* RID_VOID */ TYPESPEC,
3210 /* RID_ENUM */ ENUM,
3211 /* RID_STRUCT */ STRUCT,
3212 /* RID_UNION */ UNION,
3213 /* RID_IF */ IF,
3214 /* RID_ELSE */ ELSE,
3215 /* RID_WHILE */ WHILE,
3216 /* RID_DO */ DO,
3217 /* RID_FOR */ FOR,
3218 /* RID_SWITCH */ SWITCH,
3219 /* RID_CASE */ CASE,
3220 /* RID_DEFAULT */ DEFAULT,
3221 /* RID_BREAK */ BREAK,
3222 /* RID_CONTINUE */ CONTINUE,
3223 /* RID_RETURN */ RETURN,
3224 /* RID_GOTO */ GOTO,
3225 /* RID_SIZEOF */ SIZEOF,
3227 /* C extensions */
3228 /* RID_ASM */ ASM_KEYWORD,
3229 /* RID_TYPEOF */ TYPEOF,
3230 /* RID_ALIGNOF */ ALIGNOF,
3231 /* RID_ATTRIBUTE */ ATTRIBUTE,
3232 /* RID_VA_ARG */ VA_ARG,
3233 /* RID_EXTENSION */ EXTENSION,
3234 /* RID_IMAGPART */ IMAGPART,
3235 /* RID_REALPART */ REALPART,
3236 /* RID_LABEL */ LABEL,
3238 /* RID_CHOOSE_EXPR */ CHOOSE_EXPR,
3239 /* RID_TYPES_COMPATIBLE_P */ TYPES_COMPATIBLE_P,
3241 /* RID_FUNCTION_NAME */ FUNC_NAME,
3242 /* RID_PRETTY_FUNCTION_NAME */ FUNC_NAME,
3243 /* RID_C99_FUNCTION_NAME */ FUNC_NAME,
3245 /* C++ */
3246 /* RID_BOOL */ TYPESPEC,
3247 /* RID_WCHAR */ 0,
3248 /* RID_CLASS */ 0,
3249 /* RID_PUBLIC */ 0,
3250 /* RID_PRIVATE */ 0,
3251 /* RID_PROTECTED */ 0,
3252 /* RID_TEMPLATE */ 0,
3253 /* RID_NULL */ 0,
3254 /* RID_CATCH */ 0,
3255 /* RID_DELETE */ 0,
3256 /* RID_FALSE */ 0,
3257 /* RID_NAMESPACE */ 0,
3258 /* RID_NEW */ 0,
3259 /* RID_OFFSETOF */ OFFSETOF,
3260 /* RID_OPERATOR */ 0,
3261 /* RID_THIS */ 0,
3262 /* RID_THROW */ 0,
3263 /* RID_TRUE */ 0,
3264 /* RID_TRY */ 0,
3265 /* RID_TYPENAME */ 0,
3266 /* RID_TYPEID */ 0,
3267 /* RID_USING */ 0,
3269 /* casts */
3270 /* RID_CONSTCAST */ 0,
3271 /* RID_DYNCAST */ 0,
3272 /* RID_REINTCAST */ 0,
3273 /* RID_STATCAST */ 0,
3275 /* Objective C */
3276 /* RID_AT_ENCODE */ AT_ENCODE,
3277 /* RID_AT_END */ AT_END,
3278 /* RID_AT_CLASS */ AT_CLASS,
3279 /* RID_AT_ALIAS */ AT_ALIAS,
3280 /* RID_AT_DEFS */ AT_DEFS,
3281 /* RID_AT_PRIVATE */ AT_PRIVATE,
3282 /* RID_AT_PROTECTED */ AT_PROTECTED,
3283 /* RID_AT_PUBLIC */ AT_PUBLIC,
3284 /* RID_AT_PROTOCOL */ AT_PROTOCOL,
3285 /* RID_AT_SELECTOR */ AT_SELECTOR,
3286 /* RID_AT_THROW */ AT_THROW,
3287 /* RID_AT_TRY */ AT_TRY,
3288 /* RID_AT_CATCH */ AT_CATCH,
3289 /* RID_AT_FINALLY */ AT_FINALLY,
3290 /* RID_AT_SYNCHRONIZED */ AT_SYNCHRONIZED,
3291 /* RID_AT_INTERFACE */ AT_INTERFACE,
3292 /* RID_AT_IMPLEMENTATION */ AT_IMPLEMENTATION
3293 };
3295 static void
3296 init_reswords (void)
3297 {
3298 unsigned int i;
3299 tree id;
3300 int mask = (flag_isoc99 ? 0 : D_C89)
3301 | (flag_no_asm ? (flag_isoc99 ? D_EXT : D_EXT|D_EXT89) : 0);
3303 if (!c_dialect_objc ())
3304 mask |= D_OBJC;
3306 ridpointers = GGC_CNEWVEC (tree, (int) RID_MAX);
3307 for (i = 0; i < N_reswords; i++)
3308 {
3309 /* If a keyword is disabled, do not enter it into the table
3310 and so create a canonical spelling that isn't a keyword. */
3311 if (reswords[i].disable & mask)
3312 continue;
3314 id = get_identifier (reswords[i].word);
3315 C_RID_CODE (id) = reswords[i].rid;
3316 C_IS_RESERVED_WORD (id) = 1;
3317 ridpointers [(int) reswords[i].rid] = id;
3318 }
3319 }
3321 #define NAME(type) cpp_type2name (type)
3323 static void
3324 yyerror (const char *msgid)
3325 {
3326 c_parse_error (msgid, last_token, yylval.ttype);
3327 }
3329 static int
3330 yylexname (void)
3331 {
3332 tree decl;
3334 @@ifobjc
3335 int objc_force_identifier = objc_need_raw_identifier;
3336 OBJC_NEED_RAW_IDENTIFIER (0);
3337 @@end_ifobjc
3339 if (C_IS_RESERVED_WORD (yylval.ttype))
3340 {
3341 enum rid rid_code = C_RID_CODE (yylval.ttype);
3343 @@ifobjc
3344 if (!OBJC_IS_AT_KEYWORD (rid_code)
3345 && (!OBJC_IS_PQ_KEYWORD (rid_code) || objc_pq_context))
3346 @@end_ifobjc
3347 {
3348 /* Return the canonical spelling for this keyword. */
3349 yylval.ttype = ridpointers[(int) rid_code];
3350 return rid_to_yy[(int) rid_code];
3351 }
3352 }
3354 decl = lookup_name (yylval.ttype);
3355 if (decl)
3356 {
3357 if (TREE_CODE (decl) == TYPE_DECL)
3358 return TYPENAME;
3359 }
3360 @@ifobjc
3361 else
3362 {
3363 tree objc_interface_decl = objc_is_class_name (yylval.ttype);
3364 /* ObjC class names are in the same namespace as variables and
3365 typedefs, and hence are shadowed by local declarations. */
3366 if (objc_interface_decl
3367 && (global_bindings_p ()
3368 || (!objc_force_identifier && !decl)))
3369 {
3370 yylval.ttype = objc_interface_decl;
3371 return CLASSNAME;
3372 }
3373 }
3374 @@end_ifobjc
3376 return IDENTIFIER;
3377 }
3379 static inline int
3380 _yylex (void)
3381 {
3382 get_next:
3383 last_token = c_lex (&yylval.ttype);
3384 switch (last_token)
3385 {
3386 case CPP_EQ: return '=';
3387 case CPP_NOT: return '!';
3388 case CPP_GREATER: yylval.code = GT_EXPR; return ARITHCOMPARE;
3389 case CPP_LESS: yylval.code = LT_EXPR; return ARITHCOMPARE;
3390 case CPP_PLUS: yylval.code = PLUS_EXPR; return '+';
3391 case CPP_MINUS: yylval.code = MINUS_EXPR; return '-';
3392 case CPP_MULT: yylval.code = MULT_EXPR; return '*';
3393 case CPP_DIV: yylval.code = TRUNC_DIV_EXPR; return '/';
3394 case CPP_MOD: yylval.code = TRUNC_MOD_EXPR; return '%';
3395 case CPP_AND: yylval.code = BIT_AND_EXPR; return '&';
3396 case CPP_OR: yylval.code = BIT_IOR_EXPR; return '|';
3397 case CPP_XOR: yylval.code = BIT_XOR_EXPR; return '^';
3398 case CPP_RSHIFT: yylval.code = RSHIFT_EXPR; return RSHIFT;
3399 case CPP_LSHIFT: yylval.code = LSHIFT_EXPR; return LSHIFT;
3401 case CPP_COMPL: return '~';
3402 case CPP_AND_AND: return ANDAND;
3403 case CPP_OR_OR: return OROR;
3404 case CPP_QUERY: return '?';
3405 case CPP_OPEN_PAREN: return '(';
3406 case CPP_EQ_EQ: yylval.code = EQ_EXPR; return EQCOMPARE;
3407 case CPP_NOT_EQ: yylval.code = NE_EXPR; return EQCOMPARE;
3408 case CPP_GREATER_EQ:yylval.code = GE_EXPR; return ARITHCOMPARE;
3409 case CPP_LESS_EQ: yylval.code = LE_EXPR; return ARITHCOMPARE;
3411 case CPP_PLUS_EQ: yylval.code = PLUS_EXPR; return ASSIGN;
3412 case CPP_MINUS_EQ: yylval.code = MINUS_EXPR; return ASSIGN;
3413 case CPP_MULT_EQ: yylval.code = MULT_EXPR; return ASSIGN;
3414 case CPP_DIV_EQ: yylval.code = TRUNC_DIV_EXPR; return ASSIGN;
3415 case CPP_MOD_EQ: yylval.code = TRUNC_MOD_EXPR; return ASSIGN;
3416 case CPP_AND_EQ: yylval.code = BIT_AND_EXPR; return ASSIGN;
3417 case CPP_OR_EQ: yylval.code = BIT_IOR_EXPR; return ASSIGN;
3418 case CPP_XOR_EQ: yylval.code = BIT_XOR_EXPR; return ASSIGN;
3419 case CPP_RSHIFT_EQ: yylval.code = RSHIFT_EXPR; return ASSIGN;
3420 case CPP_LSHIFT_EQ: yylval.code = LSHIFT_EXPR; return ASSIGN;
3422 case CPP_OPEN_SQUARE: return '[';
3423 case CPP_CLOSE_SQUARE: return ']';
3424 case CPP_OPEN_BRACE: return '{';
3425 case CPP_CLOSE_BRACE: return '}';
3426 case CPP_ELLIPSIS: return ELLIPSIS;
3428 case CPP_PLUS_PLUS: return PLUSPLUS;
3429 case CPP_MINUS_MINUS: return MINUSMINUS;
3430 case CPP_DEREF: return POINTSAT;
3431 case CPP_DOT: return '.';
3433 /* The following tokens may affect the interpretation of any
3434 identifiers following, if doing Objective-C. */
3435 case CPP_COLON: OBJC_NEED_RAW_IDENTIFIER (0); return ':';
3436 case CPP_COMMA: OBJC_NEED_RAW_IDENTIFIER (0); return ',';
3437 case CPP_CLOSE_PAREN: OBJC_NEED_RAW_IDENTIFIER (0); return ')';
3438 case CPP_SEMICOLON: OBJC_NEED_RAW_IDENTIFIER (0); return ';';
3440 case CPP_EOF:
3441 return 0;
3443 case CPP_NAME:
3444 return yylexname ();
3446 case CPP_AT_NAME:
3447 /* This only happens in Objective-C; it must be a keyword. */
3448 return rid_to_yy [(int) C_RID_CODE (yylval.ttype)];
3450 case CPP_NUMBER:
3451 case CPP_CHAR:
3452 case CPP_WCHAR:
3453 return CONSTANT;
3455 case CPP_STRING:
3456 case CPP_WSTRING:
3457 return STRING;
3459 case CPP_OBJC_STRING:
3460 return OBJC_STRING;
3462 /* These tokens are C++ specific (and will not be generated
3463 in C mode, but let's be cautious). */
3464 case CPP_SCOPE:
3465 case CPP_DEREF_STAR:
3466 case CPP_DOT_STAR:
3467 case CPP_MIN_EQ:
3468 case CPP_MAX_EQ:
3469 case CPP_MIN:
3470 case CPP_MAX:
3471 /* These tokens should not survive translation phase 4. */
3472 case CPP_HASH:
3473 case CPP_PASTE:
3474 error ("syntax error at %qs token", NAME(last_token));
3475 goto get_next;
3477 default:
3478 abort ();
3479 }
3480 /* NOTREACHED */
3481 }
3483 static int
3484 yylex (void)
3485 {
3486 int r;
3487 timevar_push (TV_LEX);
3488 r = _yylex();
3489 timevar_pop (TV_LEX);
3490 return r;
3491 }
3493 /* Function used when yydebug is set, to print a token in more detail. */
3495 static void
3496 yyprint (FILE *file, int yychar, YYSTYPE yyl)
3497 {
3498 tree t = yyl.ttype;
3500 fprintf (file, " [%s]", NAME(last_token));
3502 switch (yychar)
3503 {
3504 case IDENTIFIER:
3505 case TYPENAME:
3506 case TYPESPEC:
3507 case TYPE_QUAL:
3508 case SCSPEC:
3509 case STATIC:
3510 if (IDENTIFIER_POINTER (t))
3511 fprintf (file, " '%s'", IDENTIFIER_POINTER (t));
3512 break;
3514 case CONSTANT:
3515 fprintf (file, " %s", GET_MODE_NAME (TYPE_MODE (TREE_TYPE (t))));
3516 if (TREE_CODE (t) == INTEGER_CST)
3517 {
3518 fputs (" ", file);
3519 fprintf (file, HOST_WIDE_INT_PRINT_DOUBLE_HEX,
3520 TREE_INT_CST_HIGH (t), TREE_INT_CST_LOW (t));
3521 }
3522 break;
3523 }
3524 }
3525 \f
3526 /* This is not the ideal place to put this, but we have to get it out
3527 of c-lex.c because cp/lex.c has its own version. */
3529 /* Parse the file. */
3530 void
3531 c_parse_file (void)
3532 {
3533 yyparse ();
3535 if (malloced_yyss)
3536 {
3537 free (malloced_yyss);
3538 free (malloced_yyvs);
3539 malloced_yyss = 0;
3540 }
3541 }
3543 #ifdef __XGETTEXT__
3544 /* Depending on the version of Bison used to compile this grammar,
3545 it may issue generic diagnostics spelled "syntax error" or
3546 "parse error". To prevent this from changing the translation
3547 template randomly, we list all the variants of this particular
3548 diagnostic here. Translators: there is no fine distinction
3549 between diagnostics with "syntax error" in them, and diagnostics
3550 with "parse error" in them. It's okay to give them both the same
3551 translation. */
3552 const char d1[] = N_("syntax error");
3553 const char d2[] = N_("parse error");
3554 const char d3[] = N_("syntax error; also virtual memory exhausted");
3555 const char d4[] = N_("parse error; also virtual memory exhausted");
3556 const char d5[] = N_("syntax error: cannot back up");
3557 const char d6[] = N_("parse error: cannot back up");
3558 #endif
3560 #include "gt-c-parse.h"