| blob | c5c499cf0488dccf9a876642ecbaf2e15b22f26e |
1 /* YACC parser for C syntax and for Objective C. -*-c-*-
2 Copyright (C) 1987, 1988, 1989, 1992, 1993, 1994, 1995, 1996,
3 1997, 1998, 1999, 2000, 2001 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 ifobjc
32 %expect 31 /* shift/reduce conflicts, and 1 reduce/reduce conflict. */
33 end ifobjc
34 ifc
35 %expect 10 /* shift/reduce conflicts, and no reduce/reduce conflicts. */
36 end ifc
38 %{
39 #include "config.h"
40 #include "system.h"
41 #include "tree.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 "output.h"
50 #include "toplev.h"
51 #include "ggc.h"
53 #ifdef MULTIBYTE_CHARS
54 #include <locale.h>
55 #endif
57 ifobjc
58 #include "objc-act.h"
59 end ifobjc
61 /* Like YYERROR but do call yyerror. */
62 #define YYERROR1 { yyerror ("syntax error"); YYERROR; }
64 /* Like the default stack expander, except (1) use realloc when possible,
65 (2) impose no hard maxiumum on stack size, (3) REALLY do not use alloca.
67 Irritatingly, YYSTYPE is defined after this %{ %} block, so we cannot
68 give malloced_yyvs its proper type. This is ok since all we need from
69 it is to be able to free it. */
71 static short *malloced_yyss;
72 static void *malloced_yyvs;
74 #define yyoverflow(MSG, SS, SSSIZE, VS, VSSIZE, YYSSZ) \
75 do { \
76 size_t newsize; \
77 short *newss; \
78 YYSTYPE *newvs; \
79 newsize = *(YYSSZ) *= 2; \
80 if (malloced_yyss) \
81 { \
82 newss = (short *) \
83 really_call_realloc (*(SS), newsize * sizeof (short)); \
84 newvs = (YYSTYPE *) \
85 really_call_realloc (*(VS), newsize * sizeof (YYSTYPE)); \
86 } \
87 else \
88 { \
89 newss = (short *) really_call_malloc (newsize * sizeof (short)); \
90 newvs = (YYSTYPE *) really_call_malloc (newsize * sizeof (YYSTYPE)); \
91 if (newss) \
92 memcpy (newss, *(SS), (SSSIZE)); \
93 if (newvs) \
94 memcpy (newvs, *(VS), (VSSIZE)); \
95 } \
96 if (!newss || !newvs) \
97 { \
98 yyerror (MSG); \
99 return 2; \
100 } \
101 *(SS) = newss; \
102 *(VS) = newvs; \
103 malloced_yyss = newss; \
104 malloced_yyvs = (void *) newvs; \
105 } while (0)
106 %}
108 %start program
110 %union {long itype; tree ttype; enum tree_code code;
111 const char *filename; int lineno; }
113 /* All identifiers that are not reserved words
114 and are not declared typedefs in the current block */
115 %token IDENTIFIER
117 /* All identifiers that are declared typedefs in the current block.
118 In some contexts, they are treated just like IDENTIFIER,
119 but they can also serve as typespecs in declarations. */
120 %token TYPENAME
122 /* Reserved words that specify storage class.
123 yylval contains an IDENTIFIER_NODE which indicates which one. */
124 %token SCSPEC /* Storage class other than static. */
125 %token STATIC /* Static storage class. */
127 /* Reserved words that specify type.
128 yylval contains an IDENTIFIER_NODE which indicates which one. */
129 %token TYPESPEC
131 /* Reserved words that qualify type: "const", "volatile", or "restrict".
132 yylval contains an IDENTIFIER_NODE which indicates which one. */
133 %token TYPE_QUAL
135 /* Character or numeric constants.
136 yylval is the node for the constant. */
137 %token CONSTANT
139 /* String constants in raw form.
140 yylval is a STRING_CST node. */
141 %token STRING
143 /* "...", used for functions with variable arglists. */
144 %token ELLIPSIS
146 /* the reserved words */
147 /* SCO include files test "ASM", so use something else. */
148 %token SIZEOF ENUM STRUCT UNION IF ELSE WHILE DO FOR SWITCH CASE DEFAULT
149 %token BREAK CONTINUE RETURN GOTO ASM_KEYWORD TYPEOF ALIGNOF
150 %token ATTRIBUTE EXTENSION LABEL
151 %token REALPART IMAGPART VA_ARG CHOOSE_EXPR TYPES_COMPATIBLE_P
152 %token PTR_VALUE PTR_BASE PTR_EXTENT
154 /* function name can be a string const or a var decl. */
155 %token STRING_FUNC_NAME VAR_FUNC_NAME
157 /* Add precedence rules to solve dangling else s/r conflict */
158 %nonassoc IF
159 %nonassoc ELSE
161 /* Define the operator tokens and their precedences.
162 The value is an integer because, if used, it is the tree code
163 to use in the expression made from the operator. */
165 %right <code> ASSIGN '='
166 %right <code> '?' ':'
167 %left <code> OROR
168 %left <code> ANDAND
169 %left <code> '|'
170 %left <code> '^'
171 %left <code> '&'
172 %left <code> EQCOMPARE
173 %left <code> ARITHCOMPARE
174 %left <code> LSHIFT RSHIFT
175 %left <code> '+' '-'
176 %left <code> '*' '/' '%'
177 %right <code> UNARY PLUSPLUS MINUSMINUS
178 %left HYPERUNARY
179 %left <code> POINTSAT '.' '(' '['
181 /* The Objective-C keywords. These are included in C and in
182 Objective C, so that the token codes are the same in both. */
183 %token INTERFACE IMPLEMENTATION END SELECTOR DEFS ENCODE
184 %token CLASSNAME PUBLIC PRIVATE PROTECTED PROTOCOL OBJECTNAME CLASS ALIAS
186 %type <code> unop
187 %type <ttype> ENUM STRUCT UNION IF ELSE WHILE DO FOR SWITCH CASE DEFAULT
188 %type <ttype> BREAK CONTINUE RETURN GOTO ASM_KEYWORD SIZEOF TYPEOF ALIGNOF
190 %type <ttype> identifier IDENTIFIER TYPENAME CONSTANT expr nonnull_exprlist exprlist
191 %type <ttype> expr_no_commas cast_expr unary_expr primary STRING
192 %type <ttype> declspecs_nosc_nots_nosa_noea declspecs_nosc_nots_nosa_ea
193 %type <ttype> declspecs_nosc_nots_sa_noea declspecs_nosc_nots_sa_ea
194 %type <ttype> declspecs_nosc_ts_nosa_noea declspecs_nosc_ts_nosa_ea
195 %type <ttype> declspecs_nosc_ts_sa_noea declspecs_nosc_ts_sa_ea
196 %type <ttype> declspecs_sc_nots_nosa_noea declspecs_sc_nots_nosa_ea
197 %type <ttype> declspecs_sc_nots_sa_noea declspecs_sc_nots_sa_ea
198 %type <ttype> declspecs_sc_ts_nosa_noea declspecs_sc_ts_nosa_ea
199 %type <ttype> declspecs_sc_ts_sa_noea declspecs_sc_ts_sa_ea
200 %type <ttype> declspecs_ts declspecs_nots
201 %type <ttype> declspecs_ts_nosa declspecs_nots_nosa
202 %type <ttype> declspecs_nosc_ts declspecs_nosc_nots declspecs_nosc declspecs
203 %type <ttype> maybe_type_quals_attrs typespec_nonattr typespec_attr
204 %type <ttype> typespec_reserved_nonattr typespec_reserved_attr
205 %type <ttype> typespec_nonreserved_nonattr
207 %type <ttype> scspec SCSPEC STATIC TYPESPEC TYPE_QUAL maybe_type_qual
208 %type <ttype> initdecls notype_initdecls initdcl notype_initdcl
209 %type <ttype> init maybeasm
210 %type <ttype> asm_operands nonnull_asm_operands asm_operand asm_clobbers
211 %type <ttype> maybe_attribute attributes attribute attribute_list attrib
212 %type <ttype> any_word extension
214 %type <ttype> compstmt compstmt_start compstmt_nostart compstmt_primary_start
215 %type <ttype> do_stmt_start poplevel stmt label
217 %type <ttype> c99_block_start c99_block_end
218 %type <ttype> declarator
219 %type <ttype> notype_declarator after_type_declarator
220 %type <ttype> parm_declarator
221 %type <ttype> parm_declarator_starttypename parm_declarator_nostarttypename
222 %type <ttype> array_declarator
224 %type <ttype> structsp_attr structsp_nonattr
225 %type <ttype> component_decl_list component_decl_list2
226 %type <ttype> component_decl components components_notype component_declarator
227 %type <ttype> component_notype_declarator
228 %type <ttype> enumlist enumerator
229 %type <ttype> struct_head union_head enum_head
230 %type <ttype> typename absdcl absdcl1 absdcl1_ea absdcl1_noea
231 %type <ttype> direct_absdcl1 absdcl_maybe_attribute
232 %type <ttype> xexpr parms parm firstparm identifiers
234 %type <ttype> parmlist parmlist_1 parmlist_2
235 %type <ttype> parmlist_or_identifiers parmlist_or_identifiers_1
236 %type <ttype> identifiers_or_typenames
238 %type <itype> setspecs setspecs_fp
240 %type <filename> save_filename
241 %type <lineno> save_lineno
242 \f
243 ifobjc
244 /* the Objective-C nonterminals */
246 %type <ttype> ivar_decl_list ivar_decls ivar_decl ivars ivar_declarator
247 %type <ttype> methoddecl unaryselector keywordselector selector
248 %type <ttype> keyworddecl receiver objcmessageexpr messageargs
249 %type <ttype> keywordexpr keywordarglist keywordarg
250 %type <ttype> myparms myparm optparmlist reservedwords objcselectorexpr
251 %type <ttype> selectorarg keywordnamelist keywordname objcencodeexpr
252 %type <ttype> objc_string non_empty_protocolrefs protocolrefs identifier_list objcprotocolexpr
254 %type <ttype> CLASSNAME OBJECTNAME
255 end ifobjc
256 \f
257 %{
258 /* Number of statements (loosely speaking) and compound statements
259 seen so far. */
260 static int stmt_count;
261 static int compstmt_count;
263 /* Input file and line number of the end of the body of last simple_if;
264 used by the stmt-rule immediately after simple_if returns. */
265 static const char *if_stmt_file;
266 static int if_stmt_line;
268 /* List of types and structure classes of the current declaration. */
269 static GTY(()) tree current_declspecs;
270 static GTY(()) tree prefix_attributes;
272 /* List of all the attributes applying to the identifier currently being
273 declared; includes prefix_attributes and possibly some more attributes
274 just after a comma. */
275 static GTY(()) tree all_prefix_attributes;
277 /* Stack of saved values of current_declspecs, prefix_attributes and
278 all_prefix_attributes. */
279 static GTY(()) tree declspec_stack;
281 /* PUSH_DECLSPEC_STACK is called from setspecs; POP_DECLSPEC_STACK
282 should be called from the productions making use of setspecs. */
283 #define PUSH_DECLSPEC_STACK \
284 do { \
285 declspec_stack = tree_cons (build_tree_list (prefix_attributes, \
286 all_prefix_attributes), \
287 current_declspecs, \
288 declspec_stack); \
289 } while (0)
291 #define POP_DECLSPEC_STACK \
292 do { \
293 current_declspecs = TREE_VALUE (declspec_stack); \
294 prefix_attributes = TREE_PURPOSE (TREE_PURPOSE (declspec_stack)); \
295 all_prefix_attributes = TREE_VALUE (TREE_PURPOSE (declspec_stack)); \
296 declspec_stack = TREE_CHAIN (declspec_stack); \
297 } while (0)
299 /* For __extension__, save/restore the warning flags which are
300 controlled by __extension__. */
301 #define SAVE_WARN_FLAGS() \
302 size_int (pedantic \
303 | (warn_pointer_arith << 1) \
304 | (warn_traditional << 2))
306 #define RESTORE_WARN_FLAGS(tval) \
307 do { \
308 int val = tree_low_cst (tval, 0); \
309 pedantic = val & 1; \
310 warn_pointer_arith = (val >> 1) & 1; \
311 warn_traditional = (val >> 2) & 1; \
312 } while (0)
314 ifobjc
315 /* Objective-C specific parser/lexer information */
317 static enum tree_code objc_inherit_code;
318 static int objc_pq_context = 0, objc_public_flag = 0;
320 /* The following flag is needed to contextualize ObjC lexical analysis.
321 In some cases (e.g., 'int NSObject;'), it is undesirable to bind
322 an identifier to an ObjC class, even if a class with that name
323 exists. */
324 static int objc_need_raw_identifier;
325 #define OBJC_NEED_RAW_IDENTIFIER(VAL) objc_need_raw_identifier = VAL
326 end ifobjc
328 ifc
329 #define OBJC_NEED_RAW_IDENTIFIER(VAL) /* nothing */
330 end ifc
332 /* Tell yyparse how to print a token's value, if yydebug is set. */
334 #define YYPRINT(FILE,YYCHAR,YYLVAL) yyprint(FILE,YYCHAR,YYLVAL)
336 static void yyprint PARAMS ((FILE *, int, YYSTYPE));
337 static void yyerror PARAMS ((const char *));
338 static int yylexname PARAMS ((void));
339 static int yylexstring PARAMS ((void));
340 static inline int _yylex PARAMS ((void));
341 static int yylex PARAMS ((void));
342 static void init_reswords PARAMS ((void));
344 /* Initialisation routine for this file. */
345 void
346 c_parse_init ()
347 {
348 init_reswords ();
349 }
351 %}
352 \f
353 %%
354 program: /* empty */
355 { if (pedantic)
356 pedwarn ("ISO C forbids an empty source file");
357 finish_file ();
358 }
359 | extdefs
360 {
361 /* In case there were missing closebraces,
362 get us back to the global binding level. */
363 while (! global_bindings_p ())
364 poplevel (0, 0, 0);
365 /* __FUNCTION__ is defined at file scope (""). This
366 call may not be necessary as my tests indicate it
367 still works without it. */
368 finish_fname_decls ();
369 finish_file ();
370 }
371 ;
373 /* the reason for the strange actions in this rule
374 is so that notype_initdecls when reached via datadef
375 can find a valid list of type and sc specs in $0. */
377 extdefs:
378 {$<ttype>$ = NULL_TREE; } extdef
379 | extdefs {$<ttype>$ = NULL_TREE; ggc_collect(); } extdef
380 ;
382 extdef:
383 fndef
384 | datadef
385 ifobjc
386 | objcdef
387 end ifobjc
388 | ASM_KEYWORD '(' expr ')' ';'
389 { STRIP_NOPS ($3);
390 if ((TREE_CODE ($3) == ADDR_EXPR
391 && TREE_CODE (TREE_OPERAND ($3, 0)) == STRING_CST)
392 || TREE_CODE ($3) == STRING_CST)
393 assemble_asm ($3);
394 else
395 error ("argument of `asm' is not a constant string"); }
396 | extension extdef
397 { RESTORE_WARN_FLAGS ($1); }
398 ;
400 datadef:
401 setspecs notype_initdecls ';'
402 { if (pedantic)
403 error ("ISO C forbids data definition with no type or storage class");
404 else
405 warning ("data definition has no type or storage class");
407 POP_DECLSPEC_STACK; }
408 | declspecs_nots setspecs notype_initdecls ';'
409 { POP_DECLSPEC_STACK; }
410 | declspecs_ts setspecs initdecls ';'
411 { POP_DECLSPEC_STACK; }
412 | declspecs ';'
413 { shadow_tag ($1); }
414 | error ';'
415 | error '}'
416 | ';'
417 { if (pedantic)
418 pedwarn ("ISO C does not allow extra `;' outside of a function"); }
419 ;
420 \f
421 fndef:
422 declspecs_ts setspecs declarator
423 { if (! start_function (current_declspecs, $3,
424 all_prefix_attributes))
425 YYERROR1;
426 }
427 old_style_parm_decls
428 { store_parm_decls (); }
429 save_filename save_lineno compstmt_or_error
430 { DECL_SOURCE_FILE (current_function_decl) = $7;
431 DECL_SOURCE_LINE (current_function_decl) = $8;
432 finish_function (0, 1);
433 POP_DECLSPEC_STACK; }
434 | declspecs_ts setspecs declarator error
435 { POP_DECLSPEC_STACK; }
436 | declspecs_nots setspecs notype_declarator
437 { if (! start_function (current_declspecs, $3,
438 all_prefix_attributes))
439 YYERROR1;
440 }
441 old_style_parm_decls
442 { store_parm_decls (); }
443 save_filename save_lineno compstmt_or_error
444 { DECL_SOURCE_FILE (current_function_decl) = $7;
445 DECL_SOURCE_LINE (current_function_decl) = $8;
446 finish_function (0, 1);
447 POP_DECLSPEC_STACK; }
448 | declspecs_nots setspecs notype_declarator error
449 { POP_DECLSPEC_STACK; }
450 | setspecs notype_declarator
451 { if (! start_function (NULL_TREE, $2,
452 all_prefix_attributes))
453 YYERROR1;
454 }
455 old_style_parm_decls
456 { store_parm_decls (); }
457 save_filename save_lineno compstmt_or_error
458 { DECL_SOURCE_FILE (current_function_decl) = $6;
459 DECL_SOURCE_LINE (current_function_decl) = $7;
460 finish_function (0, 1);
461 POP_DECLSPEC_STACK; }
462 | setspecs notype_declarator error
463 { POP_DECLSPEC_STACK; }
464 ;
466 identifier:
467 IDENTIFIER
468 | TYPENAME
469 ifobjc
470 | OBJECTNAME
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 { $$ = TRUTH_NOT_EXPR; }
494 ;
496 expr: nonnull_exprlist
497 { $$ = build_compound_expr ($1); }
498 ;
500 exprlist:
501 /* empty */
502 { $$ = NULL_TREE; }
503 | nonnull_exprlist
504 ;
506 nonnull_exprlist:
507 expr_no_commas
508 { $$ = build_tree_list (NULL_TREE, $1); }
509 | nonnull_exprlist ',' expr_no_commas
510 { chainon ($1, build_tree_list (NULL_TREE, $3)); }
511 ;
513 unary_expr:
514 primary
515 | '*' cast_expr %prec UNARY
516 { $$ = build_indirect_ref ($2, "unary *"); }
517 /* __extension__ turns off -pedantic for following primary. */
518 | extension cast_expr %prec UNARY
519 { $$ = $2;
520 RESTORE_WARN_FLAGS ($1); }
521 | unop cast_expr %prec UNARY
522 { $$ = build_unary_op ($1, $2, 0);
523 overflow_warning ($$); }
524 /* Refer to the address of a label as a pointer. */
525 | ANDAND identifier
526 { $$ = finish_label_address_expr ($2); }
527 /* This seems to be impossible on some machines, so let's turn it off.
528 You can use __builtin_next_arg to find the anonymous stack args.
529 | '&' ELLIPSIS
530 { tree types = TYPE_ARG_TYPES (TREE_TYPE (current_function_decl));
531 $$ = error_mark_node;
532 if (TREE_VALUE (tree_last (types)) == void_type_node)
533 error ("`&...' used in function with fixed number of arguments");
534 else
535 {
536 if (pedantic)
537 pedwarn ("ISO C forbids `&...'");
538 $$ = tree_last (DECL_ARGUMENTS (current_function_decl));
539 $$ = build_unary_op (ADDR_EXPR, $$, 0);
540 } }
541 */
542 | sizeof unary_expr %prec UNARY
543 { skip_evaluation--;
544 if (TREE_CODE ($2) == COMPONENT_REF
545 && DECL_C_BIT_FIELD (TREE_OPERAND ($2, 1)))
546 error ("`sizeof' applied to a bit-field");
547 $$ = c_sizeof (TREE_TYPE ($2)); }
548 | sizeof '(' typename ')' %prec HYPERUNARY
549 { skip_evaluation--;
550 $$ = c_sizeof (groktypename ($3)); }
551 | alignof unary_expr %prec UNARY
552 { skip_evaluation--;
553 $$ = c_alignof_expr ($2); }
554 | alignof '(' typename ')' %prec HYPERUNARY
555 { skip_evaluation--;
556 $$ = c_alignof (groktypename ($3)); }
557 | REALPART cast_expr %prec UNARY
558 { $$ = build_unary_op (REALPART_EXPR, $2, 0); }
559 | IMAGPART cast_expr %prec UNARY
560 { $$ = build_unary_op (IMAGPART_EXPR, $2, 0); }
561 ;
563 sizeof:
564 SIZEOF { skip_evaluation++; }
565 ;
567 alignof:
568 ALIGNOF { skip_evaluation++; }
569 ;
571 cast_expr:
572 unary_expr
573 | '(' typename ')' cast_expr %prec UNARY
574 { $$ = c_cast_expr ($2, $4); }
575 ;
577 expr_no_commas:
578 cast_expr
579 | expr_no_commas '+' expr_no_commas
580 { $$ = parser_build_binary_op ($2, $1, $3); }
581 | expr_no_commas '-' expr_no_commas
582 { $$ = parser_build_binary_op ($2, $1, $3); }
583 | expr_no_commas '*' expr_no_commas
584 { $$ = parser_build_binary_op ($2, $1, $3); }
585 | expr_no_commas '/' expr_no_commas
586 { $$ = parser_build_binary_op ($2, $1, $3); }
587 | expr_no_commas '%' expr_no_commas
588 { $$ = parser_build_binary_op ($2, $1, $3); }
589 | expr_no_commas LSHIFT expr_no_commas
590 { $$ = parser_build_binary_op ($2, $1, $3); }
591 | expr_no_commas RSHIFT expr_no_commas
592 { $$ = parser_build_binary_op ($2, $1, $3); }
593 | expr_no_commas ARITHCOMPARE expr_no_commas
594 { $$ = parser_build_binary_op ($2, $1, $3); }
595 | expr_no_commas EQCOMPARE expr_no_commas
596 { $$ = parser_build_binary_op ($2, $1, $3); }
597 | expr_no_commas '&' expr_no_commas
598 { $$ = parser_build_binary_op ($2, $1, $3); }
599 | expr_no_commas '|' expr_no_commas
600 { $$ = parser_build_binary_op ($2, $1, $3); }
601 | expr_no_commas '^' expr_no_commas
602 { $$ = parser_build_binary_op ($2, $1, $3); }
603 | expr_no_commas ANDAND
604 { $1 = c_common_truthvalue_conversion
605 (default_conversion ($1));
606 skip_evaluation += $1 == boolean_false_node; }
607 expr_no_commas
608 { skip_evaluation -= $1 == boolean_false_node;
609 $$ = parser_build_binary_op (TRUTH_ANDIF_EXPR, $1, $4); }
610 | expr_no_commas OROR
611 { $1 = c_common_truthvalue_conversion
612 (default_conversion ($1));
613 skip_evaluation += $1 == boolean_true_node; }
614 expr_no_commas
615 { skip_evaluation -= $1 == boolean_true_node;
616 $$ = parser_build_binary_op (TRUTH_ORIF_EXPR, $1, $4); }
617 | expr_no_commas '?'
618 { $1 = c_common_truthvalue_conversion
619 (default_conversion ($1));
620 skip_evaluation += $1 == boolean_false_node; }
621 expr ':'
622 { skip_evaluation += (($1 == boolean_true_node)
623 - ($1 == boolean_false_node)); }
624 expr_no_commas
625 { skip_evaluation -= $1 == boolean_true_node;
626 $$ = build_conditional_expr ($1, $4, $7); }
627 | expr_no_commas '?'
628 { if (pedantic)
629 pedwarn ("ISO C forbids omitting the middle term of a ?: expression");
630 /* Make sure first operand is calculated only once. */
631 $<ttype>2 = save_expr ($1);
632 $1 = c_common_truthvalue_conversion
633 (default_conversion ($<ttype>2));
634 skip_evaluation += $1 == boolean_true_node; }
635 ':' expr_no_commas
636 { skip_evaluation -= $1 == boolean_true_node;
637 $$ = build_conditional_expr ($1, $<ttype>2, $5); }
638 | expr_no_commas '=' expr_no_commas
639 { char class;
640 $$ = build_modify_expr ($1, NOP_EXPR, $3);
641 class = TREE_CODE_CLASS (TREE_CODE ($$));
642 if (IS_EXPR_CODE_CLASS (class))
643 C_SET_EXP_ORIGINAL_CODE ($$, MODIFY_EXPR);
644 }
645 | expr_no_commas ASSIGN expr_no_commas
646 { char class;
647 $$ = build_modify_expr ($1, $2, $3);
648 /* This inhibits warnings in
649 c_common_truthvalue_conversion. */
650 class = TREE_CODE_CLASS (TREE_CODE ($$));
651 if (IS_EXPR_CODE_CLASS (class))
652 C_SET_EXP_ORIGINAL_CODE ($$, ERROR_MARK);
653 }
654 ;
656 primary:
657 IDENTIFIER
658 {
659 if (yychar == YYEMPTY)
660 yychar = YYLEX;
661 $$ = build_external_ref ($1, yychar == '(');
662 }
663 | CONSTANT
664 | STRING
665 { $$ = fix_string_type ($$); }
666 | VAR_FUNC_NAME
667 { $$ = fname_decl (C_RID_CODE ($$), $$); }
668 | '(' typename ')' '{'
669 { start_init (NULL_TREE, NULL, 0);
670 $2 = groktypename ($2);
671 really_start_incremental_init ($2); }
672 initlist_maybe_comma '}' %prec UNARY
673 { tree constructor = pop_init_level (0);
674 tree type = $2;
675 finish_init ();
677 if (pedantic && ! flag_isoc99)
678 pedwarn ("ISO C89 forbids compound literals");
679 $$ = build_compound_literal (type, constructor);
680 }
681 | '(' expr ')'
682 { char class = TREE_CODE_CLASS (TREE_CODE ($2));
683 if (IS_EXPR_CODE_CLASS (class))
684 C_SET_EXP_ORIGINAL_CODE ($2, ERROR_MARK);
685 $$ = $2; }
686 | '(' error ')'
687 { $$ = error_mark_node; }
688 | compstmt_primary_start compstmt_nostart ')'
689 { tree saved_last_tree;
691 if (pedantic)
692 pedwarn ("ISO C forbids braced-groups within expressions");
693 pop_label_level ();
695 saved_last_tree = COMPOUND_BODY ($1);
696 RECHAIN_STMTS ($1, COMPOUND_BODY ($1));
697 last_tree = saved_last_tree;
698 TREE_CHAIN (last_tree) = NULL_TREE;
699 if (!last_expr_type)
700 last_expr_type = void_type_node;
701 $$ = build1 (STMT_EXPR, last_expr_type, $1);
702 TREE_SIDE_EFFECTS ($$) = 1;
703 }
704 | compstmt_primary_start error ')'
705 {
706 pop_label_level ();
707 last_tree = COMPOUND_BODY ($1);
708 TREE_CHAIN (last_tree) = NULL_TREE;
709 $$ = error_mark_node;
710 }
711 | primary '(' exprlist ')' %prec '.'
712 { $$ = build_function_call ($1, $3); }
713 | VA_ARG '(' expr_no_commas ',' typename ')'
714 { $$ = build_va_arg ($3, groktypename ($5)); }
716 | CHOOSE_EXPR '(' expr_no_commas ',' expr_no_commas ',' expr_no_commas ')'
717 {
718 tree c;
720 c = fold ($3);
721 STRIP_NOPS (c);
722 if (TREE_CODE (c) != INTEGER_CST)
723 error ("first argument to __builtin_choose_expr not a constant");
724 $$ = integer_zerop (c) ? $7 : $5;
725 }
726 | TYPES_COMPATIBLE_P '(' typename ',' typename ')'
727 {
728 tree e1, e2;
730 e1 = TYPE_MAIN_VARIANT (groktypename ($3));
731 e2 = TYPE_MAIN_VARIANT (groktypename ($5));
733 $$ = comptypes (e1, e2)
734 ? build_int_2 (1, 0) : build_int_2 (0, 0);
735 }
736 | primary '[' expr ']' %prec '.'
737 { $$ = build_array_ref ($1, $3); }
738 | primary '.' identifier
739 {
740 ifobjc
741 if (!is_public ($1, $3))
742 $$ = error_mark_node;
743 else
744 end ifobjc
745 $$ = build_component_ref ($1, $3);
746 }
747 | primary POINTSAT identifier
748 {
749 tree expr = build_indirect_ref ($1, "->");
751 ifobjc
752 if (!is_public (expr, $3))
753 $$ = error_mark_node;
754 else
755 end ifobjc
756 $$ = build_component_ref (expr, $3);
757 }
758 | primary PLUSPLUS
759 { $$ = build_unary_op (POSTINCREMENT_EXPR, $1, 0); }
760 | primary MINUSMINUS
761 { $$ = build_unary_op (POSTDECREMENT_EXPR, $1, 0); }
762 ifobjc
763 | objcmessageexpr
764 { $$ = build_message_expr ($1); }
765 | objcselectorexpr
766 { $$ = build_selector_expr ($1); }
767 | objcprotocolexpr
768 { $$ = build_protocol_expr ($1); }
769 | objcencodeexpr
770 { $$ = build_encode_expr ($1); }
771 | objc_string
772 { $$ = build_objc_string_object ($1); }
773 end ifobjc
774 ;
776 ifobjc
777 /* Produces an STRING_CST with perhaps more STRING_CSTs chained
778 onto it, which is to be read as an ObjC string object. */
779 objc_string:
780 '@' STRING
781 { $$ = $2; }
782 | objc_string '@' STRING
783 { $$ = chainon ($1, $3); }
784 ;
785 end ifobjc
787 old_style_parm_decls:
788 /* empty */
789 | datadecls
790 | datadecls ELLIPSIS
791 /* ... is used here to indicate a varargs function. */
792 { c_mark_varargs ();
793 if (pedantic)
794 pedwarn ("ISO C does not permit use of `varargs.h'"); }
795 ;
797 /* The following are analogous to lineno_decl, decls and decl
798 except that they do not allow nested functions.
799 They are used for old-style parm decls. */
800 lineno_datadecl:
801 save_filename save_lineno datadecl
802 { }
803 ;
805 datadecls:
806 lineno_datadecl
807 | errstmt
808 | datadecls lineno_datadecl
809 | lineno_datadecl errstmt
810 ;
812 /* We don't allow prefix attributes here because they cause reduce/reduce
813 conflicts: we can't know whether we're parsing a function decl with
814 attribute suffix, or function defn with attribute prefix on first old
815 style parm. */
816 datadecl:
817 declspecs_ts_nosa setspecs initdecls ';'
818 { POP_DECLSPEC_STACK; }
819 | declspecs_nots_nosa setspecs notype_initdecls ';'
820 { POP_DECLSPEC_STACK; }
821 | declspecs_ts_nosa ';'
822 { shadow_tag_warned ($1, 1);
823 pedwarn ("empty declaration"); }
824 | declspecs_nots_nosa ';'
825 { pedwarn ("empty declaration"); }
826 ;
828 /* This combination which saves a lineno before a decl
829 is the normal thing to use, rather than decl itself.
830 This is to avoid shift/reduce conflicts in contexts
831 where statement labels are allowed. */
832 lineno_decl:
833 save_filename save_lineno decl
834 { }
835 ;
837 /* records the type and storage class specs to use for processing
838 the declarators that follow.
839 Maintains a stack of outer-level values of current_declspecs,
840 for the sake of parm declarations nested in function declarators. */
841 setspecs: /* empty */
842 { pending_xref_error ();
843 PUSH_DECLSPEC_STACK;
844 split_specs_attrs ($<ttype>0,
845 ¤t_declspecs, &prefix_attributes);
846 all_prefix_attributes = prefix_attributes; }
847 ;
849 /* Possibly attributes after a comma, which should reset all_prefix_attributes
850 to prefix_attributes with these ones chained on the front. */
851 maybe_resetattrs:
852 maybe_attribute
853 { all_prefix_attributes = chainon ($1, prefix_attributes); }
854 ;
856 decl:
857 declspecs_ts setspecs initdecls ';'
858 { POP_DECLSPEC_STACK; }
859 | declspecs_nots setspecs notype_initdecls ';'
860 { POP_DECLSPEC_STACK; }
861 | declspecs_ts setspecs nested_function
862 { POP_DECLSPEC_STACK; }
863 | declspecs_nots setspecs notype_nested_function
864 { POP_DECLSPEC_STACK; }
865 | declspecs ';'
866 { shadow_tag ($1); }
867 | extension decl
868 { RESTORE_WARN_FLAGS ($1); }
869 ;
871 /* A list of declaration specifiers. These are:
873 - Storage class specifiers (scspec), which for GCC currently includes
874 function specifiers ("inline").
876 - Type specifiers (typespec_*).
878 - Type qualifiers (TYPE_QUAL).
880 - Attribute specifier lists (attributes).
882 These are stored as a TREE_LIST; the head of the list is the last
883 item in the specifier list. Each entry in the list has either a
884 TREE_PURPOSE that is an attribute specifier list, or a TREE_VALUE that
885 is a single other specifier or qualifier; and a TREE_CHAIN that is the
886 rest of the list. TREE_STATIC is set on the list if something other
887 than a storage class specifier or attribute has been seen; this is used
888 to warn for the obsolescent usage of storage class specifiers other than
889 at the start of the list. (Doing this properly would require function
890 specifiers to be handled separately from storage class specifiers.)
892 The various cases below are classified according to:
894 (a) Whether a storage class specifier is included or not; some
895 places in the grammar disallow storage class specifiers (_sc or _nosc).
897 (b) Whether a type specifier has been seen; after a type specifier,
898 a typedef name is an identifier to redeclare (_ts or _nots).
900 (c) Whether the list starts with an attribute; in certain places,
901 the grammar requires specifiers that don't start with an attribute
902 (_sa or _nosa).
904 (d) Whether the list ends with an attribute (or a specifier such that
905 any following attribute would have been parsed as part of that specifier);
906 this avoids shift-reduce conflicts in the parsing of attributes
907 (_ea or _noea).
909 TODO:
911 (i) Distinguish between function specifiers and storage class specifiers,
912 at least for the purpose of warnings about obsolescent usage.
914 (ii) Halve the number of productions here by eliminating the _sc/_nosc
915 distinction and instead checking where required that storage class
916 specifiers aren't present. */
918 /* Declspecs which contain at least one type specifier or typedef name.
919 (Just `const' or `volatile' is not enough.)
920 A typedef'd name following these is taken as a name to be declared.
921 Declspecs have a non-NULL TREE_VALUE, attributes do not. */
923 declspecs_nosc_nots_nosa_noea:
924 TYPE_QUAL
925 { $$ = tree_cons (NULL_TREE, $1, NULL_TREE);
926 TREE_STATIC ($$) = 1; }
927 | declspecs_nosc_nots_nosa_noea TYPE_QUAL
928 { $$ = tree_cons (NULL_TREE, $2, $1);
929 TREE_STATIC ($$) = 1; }
930 | declspecs_nosc_nots_nosa_ea TYPE_QUAL
931 { $$ = tree_cons (NULL_TREE, $2, $1);
932 TREE_STATIC ($$) = 1; }
933 ;
935 declspecs_nosc_nots_nosa_ea:
936 declspecs_nosc_nots_nosa_noea attributes
937 { $$ = tree_cons ($2, NULL_TREE, $1);
938 TREE_STATIC ($$) = TREE_STATIC ($1); }
939 ;
941 declspecs_nosc_nots_sa_noea:
942 declspecs_nosc_nots_sa_noea TYPE_QUAL
943 { $$ = tree_cons (NULL_TREE, $2, $1);
944 TREE_STATIC ($$) = 1; }
945 | declspecs_nosc_nots_sa_ea TYPE_QUAL
946 { $$ = tree_cons (NULL_TREE, $2, $1);
947 TREE_STATIC ($$) = 1; }
948 ;
950 declspecs_nosc_nots_sa_ea:
951 attributes
952 { $$ = tree_cons ($1, NULL_TREE, NULL_TREE);
953 TREE_STATIC ($$) = 0; }
954 | declspecs_nosc_nots_sa_noea attributes
955 { $$ = tree_cons ($2, NULL_TREE, $1);
956 TREE_STATIC ($$) = TREE_STATIC ($1); }
957 ;
959 declspecs_nosc_ts_nosa_noea:
960 typespec_nonattr
961 { $$ = tree_cons (NULL_TREE, $1, NULL_TREE);
962 TREE_STATIC ($$) = 1; }
963 | declspecs_nosc_ts_nosa_noea TYPE_QUAL
964 { $$ = tree_cons (NULL_TREE, $2, $1);
965 TREE_STATIC ($$) = 1; }
966 | declspecs_nosc_ts_nosa_ea TYPE_QUAL
967 { $$ = tree_cons (NULL_TREE, $2, $1);
968 TREE_STATIC ($$) = 1; }
969 | declspecs_nosc_ts_nosa_noea typespec_reserved_nonattr
970 { $$ = tree_cons (NULL_TREE, $2, $1);
971 TREE_STATIC ($$) = 1; }
972 | declspecs_nosc_ts_nosa_ea typespec_reserved_nonattr
973 { $$ = tree_cons (NULL_TREE, $2, $1);
974 TREE_STATIC ($$) = 1; }
975 | declspecs_nosc_nots_nosa_noea typespec_nonattr
976 { $$ = tree_cons (NULL_TREE, $2, $1);
977 TREE_STATIC ($$) = 1; }
978 | declspecs_nosc_nots_nosa_ea typespec_nonattr
979 { $$ = tree_cons (NULL_TREE, $2, $1);
980 TREE_STATIC ($$) = 1; }
981 ;
983 declspecs_nosc_ts_nosa_ea:
984 typespec_attr
985 { $$ = tree_cons (NULL_TREE, $1, NULL_TREE);
986 TREE_STATIC ($$) = 1; }
987 | declspecs_nosc_ts_nosa_noea attributes
988 { $$ = tree_cons ($2, NULL_TREE, $1);
989 TREE_STATIC ($$) = TREE_STATIC ($1); }
990 | declspecs_nosc_ts_nosa_noea typespec_reserved_attr
991 { $$ = tree_cons (NULL_TREE, $2, $1);
992 TREE_STATIC ($$) = 1; }
993 | declspecs_nosc_ts_nosa_ea typespec_reserved_attr
994 { $$ = tree_cons (NULL_TREE, $2, $1);
995 TREE_STATIC ($$) = 1; }
996 | declspecs_nosc_nots_nosa_noea typespec_attr
997 { $$ = tree_cons (NULL_TREE, $2, $1);
998 TREE_STATIC ($$) = 1; }
999 | declspecs_nosc_nots_nosa_ea typespec_attr
1000 { $$ = tree_cons (NULL_TREE, $2, $1);
1001 TREE_STATIC ($$) = 1; }
1002 ;
1004 declspecs_nosc_ts_sa_noea:
1005 declspecs_nosc_ts_sa_noea TYPE_QUAL
1006 { $$ = tree_cons (NULL_TREE, $2, $1);
1007 TREE_STATIC ($$) = 1; }
1008 | declspecs_nosc_ts_sa_ea TYPE_QUAL
1009 { $$ = tree_cons (NULL_TREE, $2, $1);
1010 TREE_STATIC ($$) = 1; }
1011 | declspecs_nosc_ts_sa_noea typespec_reserved_nonattr
1012 { $$ = tree_cons (NULL_TREE, $2, $1);
1013 TREE_STATIC ($$) = 1; }
1014 | declspecs_nosc_ts_sa_ea typespec_reserved_nonattr
1015 { $$ = tree_cons (NULL_TREE, $2, $1);
1016 TREE_STATIC ($$) = 1; }
1017 | declspecs_nosc_nots_sa_noea typespec_nonattr
1018 { $$ = tree_cons (NULL_TREE, $2, $1);
1019 TREE_STATIC ($$) = 1; }
1020 | declspecs_nosc_nots_sa_ea typespec_nonattr
1021 { $$ = tree_cons (NULL_TREE, $2, $1);
1022 TREE_STATIC ($$) = 1; }
1023 ;
1025 declspecs_nosc_ts_sa_ea:
1026 declspecs_nosc_ts_sa_noea attributes
1027 { $$ = tree_cons ($2, NULL_TREE, $1);
1028 TREE_STATIC ($$) = TREE_STATIC ($1); }
1029 | declspecs_nosc_ts_sa_noea typespec_reserved_attr
1030 { $$ = tree_cons (NULL_TREE, $2, $1);
1031 TREE_STATIC ($$) = 1; }
1032 | declspecs_nosc_ts_sa_ea typespec_reserved_attr
1033 { $$ = tree_cons (NULL_TREE, $2, $1);
1034 TREE_STATIC ($$) = 1; }
1035 | declspecs_nosc_nots_sa_noea typespec_attr
1036 { $$ = tree_cons (NULL_TREE, $2, $1);
1037 TREE_STATIC ($$) = 1; }
1038 | declspecs_nosc_nots_sa_ea typespec_attr
1039 { $$ = tree_cons (NULL_TREE, $2, $1);
1040 TREE_STATIC ($$) = 1; }
1041 ;
1043 declspecs_sc_nots_nosa_noea:
1044 scspec
1045 { $$ = tree_cons (NULL_TREE, $1, NULL_TREE);
1046 TREE_STATIC ($$) = 0; }
1047 | declspecs_sc_nots_nosa_noea TYPE_QUAL
1048 { $$ = tree_cons (NULL_TREE, $2, $1);
1049 TREE_STATIC ($$) = 1; }
1050 | declspecs_sc_nots_nosa_ea TYPE_QUAL
1051 { $$ = tree_cons (NULL_TREE, $2, $1);
1052 TREE_STATIC ($$) = 1; }
1053 | declspecs_nosc_nots_nosa_noea scspec
1054 { if (extra_warnings && TREE_STATIC ($1))
1055 warning ("`%s' is not at beginning of declaration",
1056 IDENTIFIER_POINTER ($2));
1057 $$ = tree_cons (NULL_TREE, $2, $1);
1058 TREE_STATIC ($$) = TREE_STATIC ($1); }
1059 | declspecs_nosc_nots_nosa_ea scspec
1060 { if (extra_warnings && TREE_STATIC ($1))
1061 warning ("`%s' is not at beginning of declaration",
1062 IDENTIFIER_POINTER ($2));
1063 $$ = tree_cons (NULL_TREE, $2, $1);
1064 TREE_STATIC ($$) = TREE_STATIC ($1); }
1065 | declspecs_sc_nots_nosa_noea scspec
1066 { if (extra_warnings && TREE_STATIC ($1))
1067 warning ("`%s' is not at beginning of declaration",
1068 IDENTIFIER_POINTER ($2));
1069 $$ = tree_cons (NULL_TREE, $2, $1);
1070 TREE_STATIC ($$) = TREE_STATIC ($1); }
1071 | declspecs_sc_nots_nosa_ea scspec
1072 { if (extra_warnings && TREE_STATIC ($1))
1073 warning ("`%s' is not at beginning of declaration",
1074 IDENTIFIER_POINTER ($2));
1075 $$ = tree_cons (NULL_TREE, $2, $1);
1076 TREE_STATIC ($$) = TREE_STATIC ($1); }
1077 ;
1079 declspecs_sc_nots_nosa_ea:
1080 declspecs_sc_nots_nosa_noea attributes
1081 { $$ = tree_cons ($2, NULL_TREE, $1);
1082 TREE_STATIC ($$) = TREE_STATIC ($1); }
1083 ;
1085 declspecs_sc_nots_sa_noea:
1086 declspecs_sc_nots_sa_noea TYPE_QUAL
1087 { $$ = tree_cons (NULL_TREE, $2, $1);
1088 TREE_STATIC ($$) = 1; }
1089 | declspecs_sc_nots_sa_ea TYPE_QUAL
1090 { $$ = tree_cons (NULL_TREE, $2, $1);
1091 TREE_STATIC ($$) = 1; }
1092 | declspecs_nosc_nots_sa_noea scspec
1093 { if (extra_warnings && TREE_STATIC ($1))
1094 warning ("`%s' is not at beginning of declaration",
1095 IDENTIFIER_POINTER ($2));
1096 $$ = tree_cons (NULL_TREE, $2, $1);
1097 TREE_STATIC ($$) = TREE_STATIC ($1); }
1098 | declspecs_nosc_nots_sa_ea scspec
1099 { if (extra_warnings && TREE_STATIC ($1))
1100 warning ("`%s' is not at beginning of declaration",
1101 IDENTIFIER_POINTER ($2));
1102 $$ = tree_cons (NULL_TREE, $2, $1);
1103 TREE_STATIC ($$) = TREE_STATIC ($1); }
1104 | declspecs_sc_nots_sa_noea scspec
1105 { if (extra_warnings && TREE_STATIC ($1))
1106 warning ("`%s' is not at beginning of declaration",
1107 IDENTIFIER_POINTER ($2));
1108 $$ = tree_cons (NULL_TREE, $2, $1);
1109 TREE_STATIC ($$) = TREE_STATIC ($1); }
1110 | declspecs_sc_nots_sa_ea scspec
1111 { if (extra_warnings && TREE_STATIC ($1))
1112 warning ("`%s' is not at beginning of declaration",
1113 IDENTIFIER_POINTER ($2));
1114 $$ = tree_cons (NULL_TREE, $2, $1);
1115 TREE_STATIC ($$) = TREE_STATIC ($1); }
1116 ;
1118 declspecs_sc_nots_sa_ea:
1119 declspecs_sc_nots_sa_noea attributes
1120 { $$ = tree_cons ($2, NULL_TREE, $1);
1121 TREE_STATIC ($$) = TREE_STATIC ($1); }
1122 ;
1124 declspecs_sc_ts_nosa_noea:
1125 declspecs_sc_ts_nosa_noea TYPE_QUAL
1126 { $$ = tree_cons (NULL_TREE, $2, $1);
1127 TREE_STATIC ($$) = 1; }
1128 | declspecs_sc_ts_nosa_ea TYPE_QUAL
1129 { $$ = tree_cons (NULL_TREE, $2, $1);
1130 TREE_STATIC ($$) = 1; }
1131 | declspecs_sc_ts_nosa_noea typespec_reserved_nonattr
1132 { $$ = tree_cons (NULL_TREE, $2, $1);
1133 TREE_STATIC ($$) = 1; }
1134 | declspecs_sc_ts_nosa_ea typespec_reserved_nonattr
1135 { $$ = tree_cons (NULL_TREE, $2, $1);
1136 TREE_STATIC ($$) = 1; }
1137 | declspecs_sc_nots_nosa_noea typespec_nonattr
1138 { $$ = tree_cons (NULL_TREE, $2, $1);
1139 TREE_STATIC ($$) = 1; }
1140 | declspecs_sc_nots_nosa_ea typespec_nonattr
1141 { $$ = tree_cons (NULL_TREE, $2, $1);
1142 TREE_STATIC ($$) = 1; }
1143 | declspecs_nosc_ts_nosa_noea scspec
1144 { if (extra_warnings && TREE_STATIC ($1))
1145 warning ("`%s' is not at beginning of declaration",
1146 IDENTIFIER_POINTER ($2));
1147 $$ = tree_cons (NULL_TREE, $2, $1);
1148 TREE_STATIC ($$) = TREE_STATIC ($1); }
1149 | declspecs_nosc_ts_nosa_ea scspec
1150 { if (extra_warnings && TREE_STATIC ($1))
1151 warning ("`%s' is not at beginning of declaration",
1152 IDENTIFIER_POINTER ($2));
1153 $$ = tree_cons (NULL_TREE, $2, $1);
1154 TREE_STATIC ($$) = TREE_STATIC ($1); }
1155 | declspecs_sc_ts_nosa_noea scspec
1156 { if (extra_warnings && TREE_STATIC ($1))
1157 warning ("`%s' is not at beginning of declaration",
1158 IDENTIFIER_POINTER ($2));
1159 $$ = tree_cons (NULL_TREE, $2, $1);
1160 TREE_STATIC ($$) = TREE_STATIC ($1); }
1161 | declspecs_sc_ts_nosa_ea scspec
1162 { if (extra_warnings && TREE_STATIC ($1))
1163 warning ("`%s' is not at beginning of declaration",
1164 IDENTIFIER_POINTER ($2));
1165 $$ = tree_cons (NULL_TREE, $2, $1);
1166 TREE_STATIC ($$) = TREE_STATIC ($1); }
1167 ;
1169 declspecs_sc_ts_nosa_ea:
1170 declspecs_sc_ts_nosa_noea attributes
1171 { $$ = tree_cons ($2, NULL_TREE, $1);
1172 TREE_STATIC ($$) = TREE_STATIC ($1); }
1173 | declspecs_sc_ts_nosa_noea typespec_reserved_attr
1174 { $$ = tree_cons (NULL_TREE, $2, $1);
1175 TREE_STATIC ($$) = 1; }
1176 | declspecs_sc_ts_nosa_ea typespec_reserved_attr
1177 { $$ = tree_cons (NULL_TREE, $2, $1);
1178 TREE_STATIC ($$) = 1; }
1179 | declspecs_sc_nots_nosa_noea typespec_attr
1180 { $$ = tree_cons (NULL_TREE, $2, $1);
1181 TREE_STATIC ($$) = 1; }
1182 | declspecs_sc_nots_nosa_ea typespec_attr
1183 { $$ = tree_cons (NULL_TREE, $2, $1);
1184 TREE_STATIC ($$) = 1; }
1185 ;
1187 declspecs_sc_ts_sa_noea:
1188 declspecs_sc_ts_sa_noea TYPE_QUAL
1189 { $$ = tree_cons (NULL_TREE, $2, $1);
1190 TREE_STATIC ($$) = 1; }
1191 | declspecs_sc_ts_sa_ea TYPE_QUAL
1192 { $$ = tree_cons (NULL_TREE, $2, $1);
1193 TREE_STATIC ($$) = 1; }
1194 | declspecs_sc_ts_sa_noea typespec_reserved_nonattr
1195 { $$ = tree_cons (NULL_TREE, $2, $1);
1196 TREE_STATIC ($$) = 1; }
1197 | declspecs_sc_ts_sa_ea typespec_reserved_nonattr
1198 { $$ = tree_cons (NULL_TREE, $2, $1);
1199 TREE_STATIC ($$) = 1; }
1200 | declspecs_sc_nots_sa_noea typespec_nonattr
1201 { $$ = tree_cons (NULL_TREE, $2, $1);
1202 TREE_STATIC ($$) = 1; }
1203 | declspecs_sc_nots_sa_ea typespec_nonattr
1204 { $$ = tree_cons (NULL_TREE, $2, $1);
1205 TREE_STATIC ($$) = 1; }
1206 | declspecs_nosc_ts_sa_noea scspec
1207 { if (extra_warnings && TREE_STATIC ($1))
1208 warning ("`%s' is not at beginning of declaration",
1209 IDENTIFIER_POINTER ($2));
1210 $$ = tree_cons (NULL_TREE, $2, $1);
1211 TREE_STATIC ($$) = TREE_STATIC ($1); }
1212 | declspecs_nosc_ts_sa_ea scspec
1213 { if (extra_warnings && TREE_STATIC ($1))
1214 warning ("`%s' is not at beginning of declaration",
1215 IDENTIFIER_POINTER ($2));
1216 $$ = tree_cons (NULL_TREE, $2, $1);
1217 TREE_STATIC ($$) = TREE_STATIC ($1); }
1218 | declspecs_sc_ts_sa_noea scspec
1219 { if (extra_warnings && TREE_STATIC ($1))
1220 warning ("`%s' is not at beginning of declaration",
1221 IDENTIFIER_POINTER ($2));
1222 $$ = tree_cons (NULL_TREE, $2, $1);
1223 TREE_STATIC ($$) = TREE_STATIC ($1); }
1224 | declspecs_sc_ts_sa_ea scspec
1225 { if (extra_warnings && TREE_STATIC ($1))
1226 warning ("`%s' is not at beginning of declaration",
1227 IDENTIFIER_POINTER ($2));
1228 $$ = tree_cons (NULL_TREE, $2, $1);
1229 TREE_STATIC ($$) = TREE_STATIC ($1); }
1230 ;
1232 declspecs_sc_ts_sa_ea:
1233 declspecs_sc_ts_sa_noea attributes
1234 { $$ = tree_cons ($2, NULL_TREE, $1);
1235 TREE_STATIC ($$) = TREE_STATIC ($1); }
1236 | declspecs_sc_ts_sa_noea typespec_reserved_attr
1237 { $$ = tree_cons (NULL_TREE, $2, $1);
1238 TREE_STATIC ($$) = 1; }
1239 | declspecs_sc_ts_sa_ea typespec_reserved_attr
1240 { $$ = tree_cons (NULL_TREE, $2, $1);
1241 TREE_STATIC ($$) = 1; }
1242 | declspecs_sc_nots_sa_noea typespec_attr
1243 { $$ = tree_cons (NULL_TREE, $2, $1);
1244 TREE_STATIC ($$) = 1; }
1245 | declspecs_sc_nots_sa_ea typespec_attr
1246 { $$ = tree_cons (NULL_TREE, $2, $1);
1247 TREE_STATIC ($$) = 1; }
1248 ;
1250 /* Particular useful classes of declspecs. */
1251 declspecs_ts:
1252 declspecs_nosc_ts_nosa_noea
1253 | declspecs_nosc_ts_nosa_ea
1254 | declspecs_nosc_ts_sa_noea
1255 | declspecs_nosc_ts_sa_ea
1256 | declspecs_sc_ts_nosa_noea
1257 | declspecs_sc_ts_nosa_ea
1258 | declspecs_sc_ts_sa_noea
1259 | declspecs_sc_ts_sa_ea
1260 ;
1262 declspecs_nots:
1263 declspecs_nosc_nots_nosa_noea
1264 | declspecs_nosc_nots_nosa_ea
1265 | declspecs_nosc_nots_sa_noea
1266 | declspecs_nosc_nots_sa_ea
1267 | declspecs_sc_nots_nosa_noea
1268 | declspecs_sc_nots_nosa_ea
1269 | declspecs_sc_nots_sa_noea
1270 | declspecs_sc_nots_sa_ea
1271 ;
1273 declspecs_ts_nosa:
1274 declspecs_nosc_ts_nosa_noea
1275 | declspecs_nosc_ts_nosa_ea
1276 | declspecs_sc_ts_nosa_noea
1277 | declspecs_sc_ts_nosa_ea
1278 ;
1280 declspecs_nots_nosa:
1281 declspecs_nosc_nots_nosa_noea
1282 | declspecs_nosc_nots_nosa_ea
1283 | declspecs_sc_nots_nosa_noea
1284 | declspecs_sc_nots_nosa_ea
1285 ;
1287 declspecs_nosc_ts:
1288 declspecs_nosc_ts_nosa_noea
1289 | declspecs_nosc_ts_nosa_ea
1290 | declspecs_nosc_ts_sa_noea
1291 | declspecs_nosc_ts_sa_ea
1292 ;
1294 declspecs_nosc_nots:
1295 declspecs_nosc_nots_nosa_noea
1296 | declspecs_nosc_nots_nosa_ea
1297 | declspecs_nosc_nots_sa_noea
1298 | declspecs_nosc_nots_sa_ea
1299 ;
1301 declspecs_nosc:
1302 declspecs_nosc_ts_nosa_noea
1303 | declspecs_nosc_ts_nosa_ea
1304 | declspecs_nosc_ts_sa_noea
1305 | declspecs_nosc_ts_sa_ea
1306 | declspecs_nosc_nots_nosa_noea
1307 | declspecs_nosc_nots_nosa_ea
1308 | declspecs_nosc_nots_sa_noea
1309 | declspecs_nosc_nots_sa_ea
1310 ;
1312 declspecs:
1313 declspecs_nosc_nots_nosa_noea
1314 | declspecs_nosc_nots_nosa_ea
1315 | declspecs_nosc_nots_sa_noea
1316 | declspecs_nosc_nots_sa_ea
1317 | declspecs_nosc_ts_nosa_noea
1318 | declspecs_nosc_ts_nosa_ea
1319 | declspecs_nosc_ts_sa_noea
1320 | declspecs_nosc_ts_sa_ea
1321 | declspecs_sc_nots_nosa_noea
1322 | declspecs_sc_nots_nosa_ea
1323 | declspecs_sc_nots_sa_noea
1324 | declspecs_sc_nots_sa_ea
1325 | declspecs_sc_ts_nosa_noea
1326 | declspecs_sc_ts_nosa_ea
1327 | declspecs_sc_ts_sa_noea
1328 | declspecs_sc_ts_sa_ea
1329 ;
1331 /* A (possibly empty) sequence of type qualifiers and attributes. */
1332 maybe_type_quals_attrs:
1333 /* empty */
1334 { $$ = NULL_TREE; }
1335 | declspecs_nosc_nots
1336 { $$ = $1; }
1337 ;
1339 /* A type specifier (but not a type qualifier).
1340 Once we have seen one of these in a declaration,
1341 if a typedef name appears then it is being redeclared.
1343 The _reserved versions start with a reserved word and may appear anywhere
1344 in the declaration specifiers; the _nonreserved versions may only
1345 appear before any other type specifiers, and after that are (if names)
1346 being redeclared.
1348 FIXME: should the _nonreserved version be restricted to names being
1349 redeclared only? The other entries there relate only the GNU extensions
1350 and Objective C, and are historically parsed thus, and don't make sense
1351 after other type specifiers, but it might be cleaner to count them as
1352 _reserved.
1354 _attr means: specifiers that either end with attributes,
1355 or are such that any following attributes would
1356 be parsed as part of the specifier.
1358 _nonattr: specifiers. */
1360 typespec_nonattr:
1361 typespec_reserved_nonattr
1362 | typespec_nonreserved_nonattr
1363 ;
1365 typespec_attr:
1366 typespec_reserved_attr
1367 ;
1369 typespec_reserved_nonattr:
1370 TYPESPEC
1371 { OBJC_NEED_RAW_IDENTIFIER (1); }
1372 | structsp_nonattr
1373 ;
1375 typespec_reserved_attr:
1376 structsp_attr
1377 ;
1379 typespec_nonreserved_nonattr:
1380 TYPENAME
1381 { /* For a typedef name, record the meaning, not the name.
1382 In case of `foo foo, bar;'. */
1383 $$ = lookup_name ($1); }
1384 ifobjc
1385 | CLASSNAME protocolrefs
1386 { $$ = get_static_reference ($1, $2); }
1387 | OBJECTNAME protocolrefs
1388 { $$ = get_object_reference ($2); }
1390 /* Make "<SomeProtocol>" equivalent to "id <SomeProtocol>"
1391 - nisse@lysator.liu.se */
1392 | non_empty_protocolrefs
1393 { $$ = get_object_reference ($1); }
1394 end ifobjc
1395 | TYPEOF '(' expr ')'
1396 { $$ = TREE_TYPE ($3); }
1397 | TYPEOF '(' typename ')'
1398 { $$ = groktypename ($3); }
1399 ;
1401 /* typespec_nonreserved_attr does not exist. */
1403 initdecls:
1404 initdcl
1405 | initdecls ',' maybe_resetattrs initdcl
1406 ;
1408 notype_initdecls:
1409 notype_initdcl
1410 | notype_initdecls ',' maybe_resetattrs notype_initdcl
1411 ;
1413 maybeasm:
1414 /* empty */
1415 { $$ = NULL_TREE; }
1416 | ASM_KEYWORD '(' STRING ')'
1417 { $$ = $3; }
1418 ;
1420 initdcl:
1421 declarator maybeasm maybe_attribute '='
1422 { $<ttype>$ = start_decl ($1, current_declspecs, 1,
1423 chainon ($3, all_prefix_attributes));
1424 start_init ($<ttype>$, $2, global_bindings_p ()); }
1425 init
1426 /* Note how the declaration of the variable is in effect while its init is parsed! */
1427 { finish_init ();
1428 finish_decl ($<ttype>5, $6, $2); }
1429 | declarator maybeasm maybe_attribute
1430 { tree d = start_decl ($1, current_declspecs, 0,
1431 chainon ($3, all_prefix_attributes));
1432 finish_decl (d, NULL_TREE, $2);
1433 }
1434 ;
1436 notype_initdcl:
1437 notype_declarator maybeasm maybe_attribute '='
1438 { $<ttype>$ = start_decl ($1, current_declspecs, 1,
1439 chainon ($3, all_prefix_attributes));
1440 start_init ($<ttype>$, $2, global_bindings_p ()); }
1441 init
1442 /* Note how the declaration of the variable is in effect while its init is parsed! */
1443 { finish_init ();
1444 finish_decl ($<ttype>5, $6, $2); }
1445 | notype_declarator maybeasm maybe_attribute
1446 { tree d = start_decl ($1, current_declspecs, 0,
1447 chainon ($3, all_prefix_attributes));
1448 finish_decl (d, NULL_TREE, $2); }
1449 ;
1450 /* the * rules are dummies to accept the Apollo extended syntax
1451 so that the header files compile. */
1452 maybe_attribute:
1453 /* empty */
1454 { $$ = NULL_TREE; }
1455 | attributes
1456 { $$ = $1; }
1457 ;
1459 attributes:
1460 attribute
1461 { $$ = $1; }
1462 | attributes attribute
1463 { $$ = chainon ($1, $2); }
1464 ;
1466 attribute:
1467 ATTRIBUTE '(' '(' attribute_list ')' ')'
1468 { $$ = $4; }
1469 ;
1471 attribute_list:
1472 attrib
1473 { $$ = $1; }
1474 | attribute_list ',' attrib
1475 { $$ = chainon ($1, $3); }
1476 ;
1478 attrib:
1479 /* empty */
1480 { $$ = NULL_TREE; }
1481 | any_word
1482 { $$ = build_tree_list ($1, NULL_TREE); }
1483 | any_word '(' IDENTIFIER ')'
1484 { $$ = build_tree_list ($1, build_tree_list (NULL_TREE, $3)); }
1485 | any_word '(' IDENTIFIER ',' nonnull_exprlist ')'
1486 { $$ = build_tree_list ($1, tree_cons (NULL_TREE, $3, $5)); }
1487 | any_word '(' exprlist ')'
1488 { $$ = build_tree_list ($1, $3); }
1489 ;
1491 /* This still leaves out most reserved keywords,
1492 shouldn't we include them? */
1494 any_word:
1495 identifier
1496 | scspec
1497 | TYPESPEC
1498 | TYPE_QUAL
1499 ;
1501 scspec:
1502 STATIC
1503 | SCSPEC
1504 ;
1505 \f
1506 /* Initializers. `init' is the entry point. */
1508 init:
1509 expr_no_commas
1510 | '{'
1511 { really_start_incremental_init (NULL_TREE); }
1512 initlist_maybe_comma '}'
1513 { $$ = pop_init_level (0); }
1514 | error
1515 { $$ = error_mark_node; }
1516 ;
1518 /* `initlist_maybe_comma' is the guts of an initializer in braces. */
1519 initlist_maybe_comma:
1520 /* empty */
1521 { if (pedantic)
1522 pedwarn ("ISO C forbids empty initializer braces"); }
1523 | initlist1 maybecomma
1524 ;
1526 initlist1:
1527 initelt
1528 | initlist1 ',' initelt
1529 ;
1531 /* `initelt' is a single element of an initializer.
1532 It may use braces. */
1533 initelt:
1534 designator_list '=' initval
1535 { if (pedantic && ! flag_isoc99)
1536 pedwarn ("ISO C89 forbids specifying subobject to initialize"); }
1537 | designator initval
1538 { if (pedantic)
1539 pedwarn ("obsolete use of designated initializer without `='"); }
1540 | identifier ':'
1541 { set_init_label ($1);
1542 if (pedantic)
1543 pedwarn ("obsolete use of designated initializer with `:'"); }
1544 initval
1545 | initval
1546 ;
1548 initval:
1549 '{'
1550 { push_init_level (0); }
1551 initlist_maybe_comma '}'
1552 { process_init_element (pop_init_level (0)); }
1553 | expr_no_commas
1554 { process_init_element ($1); }
1555 | error
1556 ;
1558 designator_list:
1559 designator
1560 | designator_list designator
1561 ;
1563 designator:
1564 '.' identifier
1565 { set_init_label ($2); }
1566 /* These are for labeled elements. The syntax for an array element
1567 initializer conflicts with the syntax for an Objective-C message,
1568 so don't include these productions in the Objective-C grammar. */
1569 ifc
1570 | '[' expr_no_commas ELLIPSIS expr_no_commas ']'
1571 { set_init_index ($2, $4);
1572 if (pedantic)
1573 pedwarn ("ISO C forbids specifying range of elements to initialize"); }
1574 | '[' expr_no_commas ']'
1575 { set_init_index ($2, NULL_TREE); }
1576 end ifc
1577 ;
1578 \f
1579 nested_function:
1580 declarator
1581 { if (pedantic)
1582 pedwarn ("ISO C forbids nested functions");
1584 push_function_context ();
1585 if (! start_function (current_declspecs, $1,
1586 all_prefix_attributes))
1587 {
1588 pop_function_context ();
1589 YYERROR1;
1590 }
1591 }
1592 old_style_parm_decls
1593 { store_parm_decls (); }
1594 /* This used to use compstmt_or_error.
1595 That caused a bug with input `f(g) int g {}',
1596 where the use of YYERROR1 above caused an error
1597 which then was handled by compstmt_or_error.
1598 There followed a repeated execution of that same rule,
1599 which called YYERROR1 again, and so on. */
1600 save_filename save_lineno compstmt
1601 { tree decl = current_function_decl;
1602 DECL_SOURCE_FILE (decl) = $5;
1603 DECL_SOURCE_LINE (decl) = $6;
1604 finish_function (1, 1);
1605 pop_function_context ();
1606 add_decl_stmt (decl); }
1607 ;
1609 notype_nested_function:
1610 notype_declarator
1611 { if (pedantic)
1612 pedwarn ("ISO C forbids nested functions");
1614 push_function_context ();
1615 if (! start_function (current_declspecs, $1,
1616 all_prefix_attributes))
1617 {
1618 pop_function_context ();
1619 YYERROR1;
1620 }
1621 }
1622 old_style_parm_decls
1623 { store_parm_decls (); }
1624 /* This used to use compstmt_or_error.
1625 That caused a bug with input `f(g) int g {}',
1626 where the use of YYERROR1 above caused an error
1627 which then was handled by compstmt_or_error.
1628 There followed a repeated execution of that same rule,
1629 which called YYERROR1 again, and so on. */
1630 save_filename save_lineno compstmt
1631 { tree decl = current_function_decl;
1632 DECL_SOURCE_FILE (decl) = $5;
1633 DECL_SOURCE_LINE (decl) = $6;
1634 finish_function (1, 1);
1635 pop_function_context ();
1636 add_decl_stmt (decl); }
1637 ;
1639 /* Any kind of declarator (thus, all declarators allowed
1640 after an explicit typespec). */
1642 declarator:
1643 after_type_declarator
1644 | notype_declarator
1645 ;
1647 /* A declarator that is allowed only after an explicit typespec. */
1649 after_type_declarator:
1650 '(' maybe_attribute after_type_declarator ')'
1651 { $$ = $2 ? tree_cons ($2, $3, NULL_TREE) : $3; }
1652 | after_type_declarator '(' parmlist_or_identifiers %prec '.'
1653 { $$ = build_nt (CALL_EXPR, $1, $3, NULL_TREE); }
1654 /* | after_type_declarator '(' error ')' %prec '.'
1655 { $$ = build_nt (CALL_EXPR, $1, NULL_TREE, NULL_TREE);
1656 poplevel (0, 0, 0); } */
1657 | after_type_declarator array_declarator %prec '.'
1658 { $$ = set_array_declarator_type ($2, $1, 0); }
1659 | '*' maybe_type_quals_attrs after_type_declarator %prec UNARY
1660 { $$ = make_pointer_declarator ($2, $3); }
1661 | TYPENAME
1662 ifobjc
1663 | OBJECTNAME
1664 end ifobjc
1665 ;
1667 /* Kinds of declarator that can appear in a parameter list
1668 in addition to notype_declarator. This is like after_type_declarator
1669 but does not allow a typedef name in parentheses as an identifier
1670 (because it would conflict with a function with that typedef as arg). */
1671 parm_declarator:
1672 parm_declarator_starttypename
1673 | parm_declarator_nostarttypename
1674 ;
1676 parm_declarator_starttypename:
1677 parm_declarator_starttypename '(' parmlist_or_identifiers %prec '.'
1678 { $$ = build_nt (CALL_EXPR, $1, $3, NULL_TREE); }
1679 /* | parm_declarator_starttypename '(' error ')' %prec '.'
1680 { $$ = build_nt (CALL_EXPR, $1, NULL_TREE, NULL_TREE);
1681 poplevel (0, 0, 0); } */
1682 | parm_declarator_starttypename array_declarator %prec '.'
1683 { $$ = set_array_declarator_type ($2, $1, 0); }
1684 | TYPENAME
1685 ifobjc
1686 | OBJECTNAME
1687 end ifobjc
1688 ;
1690 parm_declarator_nostarttypename:
1691 parm_declarator_nostarttypename '(' parmlist_or_identifiers %prec '.'
1692 { $$ = build_nt (CALL_EXPR, $1, $3, NULL_TREE); }
1693 /* | parm_declarator_nostarttypename '(' error ')' %prec '.'
1694 { $$ = build_nt (CALL_EXPR, $1, NULL_TREE, NULL_TREE);
1695 poplevel (0, 0, 0); } */
1696 | parm_declarator_nostarttypename array_declarator %prec '.'
1697 { $$ = set_array_declarator_type ($2, $1, 0); }
1698 | '*' maybe_type_quals_attrs parm_declarator_starttypename %prec UNARY
1699 { $$ = make_pointer_declarator ($2, $3); }
1700 | '*' maybe_type_quals_attrs parm_declarator_nostarttypename %prec UNARY
1701 { $$ = make_pointer_declarator ($2, $3); }
1702 | '(' maybe_attribute parm_declarator_nostarttypename ')'
1703 { $$ = $2 ? tree_cons ($2, $3, NULL_TREE) : $3; }
1704 ;
1706 /* A declarator allowed whether or not there has been
1707 an explicit typespec. These cannot redeclare a typedef-name. */
1709 notype_declarator:
1710 notype_declarator '(' parmlist_or_identifiers %prec '.'
1711 { $$ = build_nt (CALL_EXPR, $1, $3, NULL_TREE); }
1712 /* | notype_declarator '(' error ')' %prec '.'
1713 { $$ = build_nt (CALL_EXPR, $1, NULL_TREE, NULL_TREE);
1714 poplevel (0, 0, 0); } */
1715 | '(' maybe_attribute notype_declarator ')'
1716 { $$ = $2 ? tree_cons ($2, $3, NULL_TREE) : $3; }
1717 | '*' maybe_type_quals_attrs notype_declarator %prec UNARY
1718 { $$ = make_pointer_declarator ($2, $3); }
1719 | notype_declarator array_declarator %prec '.'
1720 { $$ = set_array_declarator_type ($2, $1, 0); }
1721 | IDENTIFIER
1722 ;
1724 struct_head:
1725 STRUCT
1726 { $$ = NULL_TREE; }
1727 | STRUCT attributes
1728 { $$ = $2; }
1729 ;
1731 union_head:
1732 UNION
1733 { $$ = NULL_TREE; }
1734 | UNION attributes
1735 { $$ = $2; }
1736 ;
1738 enum_head:
1739 ENUM
1740 { $$ = NULL_TREE; }
1741 | ENUM attributes
1742 { $$ = $2; }
1743 ;
1745 /* structsp_attr: struct/union/enum specifiers that either
1746 end with attributes, or are such that any following attributes would
1747 be parsed as part of the struct/union/enum specifier.
1749 structsp_nonattr: other struct/union/enum specifiers. */
1751 structsp_attr:
1752 struct_head identifier '{'
1753 { $$ = start_struct (RECORD_TYPE, $2);
1754 /* Start scope of tag before parsing components. */
1755 }
1756 component_decl_list '}' maybe_attribute
1757 { $$ = finish_struct ($<ttype>4, $5, chainon ($1, $7)); }
1758 | struct_head '{' component_decl_list '}' maybe_attribute
1759 { $$ = finish_struct (start_struct (RECORD_TYPE, NULL_TREE),
1760 $3, chainon ($1, $5));
1761 }
1762 | union_head identifier '{'
1763 { $$ = start_struct (UNION_TYPE, $2); }
1764 component_decl_list '}' maybe_attribute
1765 { $$ = finish_struct ($<ttype>4, $5, chainon ($1, $7)); }
1766 | union_head '{' component_decl_list '}' maybe_attribute
1767 { $$ = finish_struct (start_struct (UNION_TYPE, NULL_TREE),
1768 $3, chainon ($1, $5));
1769 }
1770 | enum_head identifier '{'
1771 { $$ = start_enum ($2); }
1772 enumlist maybecomma_warn '}' maybe_attribute
1773 { $$ = finish_enum ($<ttype>4, nreverse ($5),
1774 chainon ($1, $8)); }
1775 | enum_head '{'
1776 { $$ = start_enum (NULL_TREE); }
1777 enumlist maybecomma_warn '}' maybe_attribute
1778 { $$ = finish_enum ($<ttype>3, nreverse ($4),
1779 chainon ($1, $7)); }
1780 ;
1782 structsp_nonattr:
1783 struct_head identifier
1784 { $$ = xref_tag (RECORD_TYPE, $2); }
1785 | union_head identifier
1786 { $$ = xref_tag (UNION_TYPE, $2); }
1787 | enum_head identifier
1788 { $$ = xref_tag (ENUMERAL_TYPE, $2);
1789 /* In ISO C, enumerated types can be referred to
1790 only if already defined. */
1791 if (pedantic && !COMPLETE_TYPE_P ($$))
1792 pedwarn ("ISO C forbids forward references to `enum' types"); }
1793 ;
1795 maybecomma:
1796 /* empty */
1797 | ','
1798 ;
1800 maybecomma_warn:
1801 /* empty */
1802 | ','
1803 { if (pedantic && ! flag_isoc99)
1804 pedwarn ("comma at end of enumerator list"); }
1805 ;
1807 component_decl_list:
1808 component_decl_list2
1809 { $$ = $1; }
1810 | component_decl_list2 component_decl
1811 { $$ = chainon ($1, $2);
1812 pedwarn ("no semicolon at end of struct or union"); }
1813 ;
1815 component_decl_list2: /* empty */
1816 { $$ = NULL_TREE; }
1817 | component_decl_list2 component_decl ';'
1818 { $$ = chainon ($1, $2); }
1819 | component_decl_list2 ';'
1820 { if (pedantic)
1821 pedwarn ("extra semicolon in struct or union specified"); }
1822 ifobjc
1823 /* foo(sizeof(struct{ @defs(ClassName)})); */
1824 | DEFS '(' CLASSNAME ')'
1825 {
1826 tree interface = lookup_interface ($3);
1828 if (interface)
1829 $$ = get_class_ivars (interface);
1830 else
1831 {
1832 error ("cannot find interface declaration for `%s'",
1833 IDENTIFIER_POINTER ($3));
1834 $$ = NULL_TREE;
1835 }
1836 }
1837 end ifobjc
1838 ;
1840 component_decl:
1841 declspecs_nosc_ts setspecs components
1842 { $$ = $3;
1843 POP_DECLSPEC_STACK; }
1844 | declspecs_nosc_ts setspecs save_filename save_lineno
1845 {
1846 /* Support for unnamed structs or unions as members of
1847 structs or unions (which is [a] useful and [b] supports
1848 MS P-SDK). */
1849 if (pedantic)
1850 pedwarn ("ISO C doesn't support unnamed structs/unions");
1852 $$ = grokfield($3, $4, NULL, current_declspecs, NULL_TREE);
1853 POP_DECLSPEC_STACK; }
1854 | declspecs_nosc_nots setspecs components_notype
1855 { $$ = $3;
1856 POP_DECLSPEC_STACK; }
1857 | declspecs_nosc_nots
1858 { if (pedantic)
1859 pedwarn ("ISO C forbids member declarations with no members");
1860 shadow_tag($1);
1861 $$ = NULL_TREE; }
1862 | error
1863 { $$ = NULL_TREE; }
1864 | extension component_decl
1865 { $$ = $2;
1866 RESTORE_WARN_FLAGS ($1); }
1867 ;
1869 components:
1870 component_declarator
1871 | components ',' maybe_resetattrs component_declarator
1872 { $$ = chainon ($1, $4); }
1873 ;
1875 components_notype:
1876 component_notype_declarator
1877 | components_notype ',' maybe_resetattrs component_notype_declarator
1878 { $$ = chainon ($1, $4); }
1879 ;
1881 component_declarator:
1882 save_filename save_lineno declarator maybe_attribute
1883 { $$ = grokfield ($1, $2, $3, current_declspecs, NULL_TREE);
1884 decl_attributes (&$$, chainon ($4, all_prefix_attributes), 0); }
1885 | save_filename save_lineno
1886 declarator ':' expr_no_commas maybe_attribute
1887 { $$ = grokfield ($1, $2, $3, current_declspecs, $5);
1888 decl_attributes (&$$, chainon ($6, all_prefix_attributes), 0); }
1889 | save_filename save_lineno ':' expr_no_commas maybe_attribute
1890 { $$ = grokfield ($1, $2, NULL_TREE, current_declspecs, $4);
1891 decl_attributes (&$$, chainon ($5, all_prefix_attributes), 0); }
1892 ;
1894 component_notype_declarator:
1895 save_filename save_lineno notype_declarator maybe_attribute
1896 { $$ = grokfield ($1, $2, $3, current_declspecs, NULL_TREE);
1897 decl_attributes (&$$, chainon ($4, all_prefix_attributes), 0); }
1898 | save_filename save_lineno
1899 notype_declarator ':' expr_no_commas maybe_attribute
1900 { $$ = grokfield ($1, $2, $3, current_declspecs, $5);
1901 decl_attributes (&$$, chainon ($6, all_prefix_attributes), 0); }
1902 | save_filename save_lineno ':' expr_no_commas maybe_attribute
1903 { $$ = grokfield ($1, $2, NULL_TREE, current_declspecs, $4);
1904 decl_attributes (&$$, chainon ($5, all_prefix_attributes), 0); }
1905 ;
1907 /* We chain the enumerators in reverse order.
1908 They are put in forward order where enumlist is used.
1909 (The order used to be significant, but no longer is so.
1910 However, we still maintain the order, just to be clean.) */
1912 enumlist:
1913 enumerator
1914 | enumlist ',' enumerator
1915 { if ($1 == error_mark_node)
1916 $$ = $1;
1917 else
1918 $$ = chainon ($3, $1); }
1919 | error
1920 { $$ = error_mark_node; }
1921 ;
1924 enumerator:
1925 identifier
1926 { $$ = build_enumerator ($1, NULL_TREE); }
1927 | identifier '=' expr_no_commas
1928 { $$ = build_enumerator ($1, $3); }
1929 ;
1931 typename:
1932 declspecs_nosc
1933 { pending_xref_error ();
1934 $<ttype>$ = $1; }
1935 absdcl
1936 { $$ = build_tree_list ($<ttype>2, $3); }
1937 ;
1939 absdcl: /* an absolute declarator */
1940 /* empty */
1941 { $$ = NULL_TREE; }
1942 | absdcl1
1943 ;
1945 absdcl_maybe_attribute: /* absdcl maybe_attribute, but not just attributes */
1946 /* empty */
1947 { $$ = build_tree_list (build_tree_list (current_declspecs,
1948 NULL_TREE),
1949 all_prefix_attributes); }
1950 | absdcl1
1951 { $$ = build_tree_list (build_tree_list (current_declspecs,
1952 $1),
1953 all_prefix_attributes); }
1954 | absdcl1_noea attributes
1955 { $$ = build_tree_list (build_tree_list (current_declspecs,
1956 $1),
1957 chainon ($2, all_prefix_attributes)); }
1958 ;
1960 absdcl1: /* a nonempty absolute declarator */
1961 absdcl1_ea
1962 | absdcl1_noea
1963 ;
1965 absdcl1_noea:
1966 direct_absdcl1
1967 | '*' maybe_type_quals_attrs absdcl1_noea
1968 { $$ = make_pointer_declarator ($2, $3); }
1969 ;
1971 absdcl1_ea:
1972 '*' maybe_type_quals_attrs
1973 { $$ = make_pointer_declarator ($2, NULL_TREE); }
1974 | '*' maybe_type_quals_attrs absdcl1_ea
1975 { $$ = make_pointer_declarator ($2, $3); }
1976 ;
1978 direct_absdcl1:
1979 '(' maybe_attribute absdcl1 ')'
1980 { $$ = $2 ? tree_cons ($2, $3, NULL_TREE) : $3; }
1981 | direct_absdcl1 '(' parmlist
1982 { $$ = build_nt (CALL_EXPR, $1, $3, NULL_TREE); }
1983 | direct_absdcl1 array_declarator
1984 { $$ = set_array_declarator_type ($2, $1, 1); }
1985 | '(' parmlist
1986 { $$ = build_nt (CALL_EXPR, NULL_TREE, $2, NULL_TREE); }
1987 | array_declarator
1988 { $$ = set_array_declarator_type ($1, NULL_TREE, 1); }
1989 ;
1991 /* The [...] part of a declarator for an array type. */
1993 array_declarator:
1994 '[' maybe_type_quals_attrs expr ']'
1995 { $$ = build_array_declarator ($3, $2, 0, 0); }
1996 | '[' maybe_type_quals_attrs ']'
1997 { $$ = build_array_declarator (NULL_TREE, $2, 0, 0); }
1998 | '[' maybe_type_quals_attrs '*' ']'
1999 { $$ = build_array_declarator (NULL_TREE, $2, 0, 1); }
2000 | '[' STATIC maybe_type_quals_attrs expr ']'
2001 { $$ = build_array_declarator ($4, $3, 1, 0); }
2002 /* declspecs_nosc_nots is a synonym for type_quals_attrs. */
2003 | '[' declspecs_nosc_nots STATIC expr ']'
2004 { $$ = build_array_declarator ($4, $2, 1, 0); }
2005 ;
2007 /* A nonempty series of declarations and statements (possibly followed by
2008 some labels) that can form the body of a compound statement.
2009 NOTE: we don't allow labels on declarations; this might seem like a
2010 natural extension, but there would be a conflict between attributes
2011 on the label and prefix attributes on the declaration. */
2013 stmts_and_decls:
2014 lineno_stmt_decl_or_labels_ending_stmt
2015 | lineno_stmt_decl_or_labels_ending_decl
2016 | lineno_stmt_decl_or_labels_ending_label
2017 {
2018 pedwarn ("deprecated use of label at end of compound statement");
2019 }
2020 | lineno_stmt_decl_or_labels_ending_error
2021 ;
2023 lineno_stmt_decl_or_labels_ending_stmt:
2024 lineno_stmt
2025 | lineno_stmt_decl_or_labels_ending_stmt lineno_stmt
2026 | lineno_stmt_decl_or_labels_ending_decl lineno_stmt
2027 | lineno_stmt_decl_or_labels_ending_label lineno_stmt
2028 | lineno_stmt_decl_or_labels_ending_error lineno_stmt
2029 ;
2031 lineno_stmt_decl_or_labels_ending_decl:
2032 lineno_decl
2033 | lineno_stmt_decl_or_labels_ending_stmt lineno_decl
2034 { if (pedantic && !flag_isoc99)
2035 pedwarn ("ISO C89 forbids mixed declarations and code"); }
2036 | lineno_stmt_decl_or_labels_ending_decl lineno_decl
2037 | lineno_stmt_decl_or_labels_ending_error lineno_decl
2038 ;
2040 lineno_stmt_decl_or_labels_ending_label:
2041 lineno_label
2042 | lineno_stmt_decl_or_labels_ending_stmt lineno_label
2043 | lineno_stmt_decl_or_labels_ending_decl lineno_label
2044 | lineno_stmt_decl_or_labels_ending_label lineno_label
2045 | lineno_stmt_decl_or_labels_ending_error lineno_label
2046 ;
2048 lineno_stmt_decl_or_labels_ending_error:
2049 errstmt
2050 | lineno_stmt_decl_or_labels errstmt
2051 ;
2053 lineno_stmt_decl_or_labels:
2054 lineno_stmt_decl_or_labels_ending_stmt
2055 | lineno_stmt_decl_or_labels_ending_decl
2056 | lineno_stmt_decl_or_labels_ending_label
2057 | lineno_stmt_decl_or_labels_ending_error
2058 ;
2060 errstmt: error ';'
2061 ;
2063 pushlevel: /* empty */
2064 { pushlevel (0);
2065 clear_last_expr ();
2066 add_scope_stmt (/*begin_p=*/1, /*partial_p=*/0);
2067 ifobjc
2068 if (objc_method_context)
2069 add_objc_decls ();
2070 end ifobjc
2071 }
2072 ;
2074 poplevel: /* empty */
2075 { $$ = add_scope_stmt (/*begin_p=*/0, /*partial_p=*/0); }
2076 ;
2078 /* Start and end blocks created for the new scopes of C99. */
2079 c99_block_start: /* empty */
2080 { if (flag_isoc99)
2081 {
2082 $$ = c_begin_compound_stmt ();
2083 pushlevel (0);
2084 clear_last_expr ();
2085 add_scope_stmt (/*begin_p=*/1, /*partial_p=*/0);
2086 ifobjc
2087 if (objc_method_context)
2088 add_objc_decls ();
2089 end ifobjc
2090 }
2091 else
2092 $$ = NULL_TREE;
2093 }
2094 ;
2096 /* Productions using c99_block_start and c99_block_end will need to do what's
2097 in compstmt: RECHAIN_STMTS ($1, COMPOUND_BODY ($1)); $$ = $2; where
2098 $1 is the value of c99_block_start and $2 of c99_block_end. */
2099 c99_block_end: /* empty */
2100 { if (flag_isoc99)
2101 {
2102 tree scope_stmt = add_scope_stmt (/*begin_p=*/0, /*partial_p=*/0);
2103 $$ = poplevel (kept_level_p (), 0, 0);
2104 SCOPE_STMT_BLOCK (TREE_PURPOSE (scope_stmt))
2105 = SCOPE_STMT_BLOCK (TREE_VALUE (scope_stmt))
2106 = $$;
2107 }
2108 else
2109 $$ = NULL_TREE; }
2110 ;
2112 /* Read zero or more forward-declarations for labels
2113 that nested functions can jump to. */
2114 maybe_label_decls:
2115 /* empty */
2116 | label_decls
2117 { if (pedantic)
2118 pedwarn ("ISO C forbids label declarations"); }
2119 ;
2121 label_decls:
2122 label_decl
2123 | label_decls label_decl
2124 ;
2126 label_decl:
2127 LABEL identifiers_or_typenames ';'
2128 { tree link;
2129 for (link = $2; link; link = TREE_CHAIN (link))
2130 {
2131 tree label = shadow_label (TREE_VALUE (link));
2132 C_DECLARED_LABEL_FLAG (label) = 1;
2133 add_decl_stmt (label);
2134 }
2135 }
2136 ;
2138 /* This is the body of a function definition.
2139 It causes syntax errors to ignore to the next openbrace. */
2140 compstmt_or_error:
2141 compstmt
2142 {}
2143 | error compstmt
2144 ;
2146 compstmt_start: '{' { compstmt_count++;
2147 $$ = c_begin_compound_stmt (); }
2148 ;
2150 compstmt_nostart: '}'
2151 { $$ = convert (void_type_node, integer_zero_node); }
2152 | pushlevel maybe_label_decls compstmt_contents_nonempty '}' poplevel
2153 { $$ = poplevel (kept_level_p (), 1, 0);
2154 SCOPE_STMT_BLOCK (TREE_PURPOSE ($5))
2155 = SCOPE_STMT_BLOCK (TREE_VALUE ($5))
2156 = $$; }
2157 ;
2159 compstmt_contents_nonempty:
2160 stmts_and_decls
2161 | error
2162 ;
2164 compstmt_primary_start:
2165 '(' '{'
2166 { if (current_function_decl == 0)
2167 {
2168 error ("braced-group within expression allowed only inside a function");
2169 YYERROR;
2170 }
2171 /* We must force a BLOCK for this level
2172 so that, if it is not expanded later,
2173 there is a way to turn off the entire subtree of blocks
2174 that are contained in it. */
2175 keep_next_level ();
2176 push_label_level ();
2177 compstmt_count++;
2178 $$ = add_stmt (build_stmt (COMPOUND_STMT, last_tree));
2179 }
2180 ;
2182 compstmt: compstmt_start compstmt_nostart
2183 { RECHAIN_STMTS ($1, COMPOUND_BODY ($1));
2184 last_expr_type = NULL_TREE;
2185 $$ = $1; }
2186 ;
2188 /* Value is number of statements counted as of the closeparen. */
2189 simple_if:
2190 if_prefix c99_block_lineno_labeled_stmt
2191 { c_finish_then (); }
2192 /* Make sure c_expand_end_cond is run once
2193 for each call to c_expand_start_cond.
2194 Otherwise a crash is likely. */
2195 | if_prefix error
2196 ;
2198 if_prefix:
2199 /* We must build the IF_STMT node before parsing its
2200 condition so that STMT_LINENO refers to the line
2201 containing the "if", and not the line containing
2202 the close-parenthesis.
2204 c_begin_if_stmt returns the IF_STMT node, which
2205 we later pass to c_expand_start_cond to fill
2206 in the condition and other tidbits. */
2207 IF
2208 { $<ttype>$ = c_begin_if_stmt (); }
2209 '(' expr ')'
2210 { c_expand_start_cond (c_common_truthvalue_conversion ($4),
2211 compstmt_count,$<ttype>2);
2212 $<itype>$ = stmt_count;
2213 if_stmt_file = $<filename>-2;
2214 if_stmt_line = $<lineno>-1; }
2215 ;
2217 /* This is a subroutine of stmt.
2218 It is used twice, once for valid DO statements
2219 and once for catching errors in parsing the end test. */
2220 do_stmt_start:
2221 DO
2222 { stmt_count++;
2223 compstmt_count++;
2224 $<ttype>$
2225 = add_stmt (build_stmt (DO_STMT, NULL_TREE,
2226 NULL_TREE));
2227 /* In the event that a parse error prevents
2228 parsing the complete do-statement, set the
2229 condition now. Otherwise, we can get crashes at
2230 RTL-generation time. */
2231 DO_COND ($<ttype>$) = error_mark_node; }
2232 c99_block_lineno_labeled_stmt WHILE
2233 { $$ = $<ttype>2;
2234 RECHAIN_STMTS ($$, DO_BODY ($$)); }
2235 ;
2237 /* The forced readahead in here is because we might be at the end of a
2238 line, and the line and file won't be bumped until yylex absorbs the
2239 first token on the next line. */
2240 save_filename:
2241 { if (yychar == YYEMPTY)
2242 yychar = YYLEX;
2243 $$ = input_filename; }
2244 ;
2246 save_lineno:
2247 { if (yychar == YYEMPTY)
2248 yychar = YYLEX;
2249 $$ = lineno; }
2250 ;
2252 lineno_labeled_stmt:
2253 lineno_stmt
2254 | lineno_label lineno_labeled_stmt
2255 ;
2257 /* Like lineno_labeled_stmt, but a block in C99. */
2258 c99_block_lineno_labeled_stmt:
2259 c99_block_start lineno_labeled_stmt c99_block_end
2260 { if (flag_isoc99)
2261 RECHAIN_STMTS ($1, COMPOUND_BODY ($1)); }
2262 ;
2264 lineno_stmt:
2265 save_filename save_lineno stmt
2266 { if ($3)
2267 {
2268 STMT_LINENO ($3) = $2;
2269 /* ??? We currently have no way of recording
2270 the filename for a statement. This probably
2271 matters little in practice at the moment,
2272 but I suspect that problems will occur when
2273 doing inlining at the tree level. */
2274 }
2275 }
2276 ;
2278 lineno_label:
2279 save_filename save_lineno label
2280 { if ($3)
2281 {
2282 STMT_LINENO ($3) = $2;
2283 }
2284 }
2285 ;
2287 select_or_iter_stmt:
2288 simple_if ELSE
2289 { c_expand_start_else ();
2290 $<itype>1 = stmt_count; }
2291 c99_block_lineno_labeled_stmt
2292 { c_finish_else ();
2293 c_expand_end_cond ();
2294 if (extra_warnings && stmt_count == $<itype>1)
2295 warning ("empty body in an else-statement"); }
2296 | simple_if %prec IF
2297 { c_expand_end_cond ();
2298 /* This warning is here instead of in simple_if, because we
2299 do not want a warning if an empty if is followed by an
2300 else statement. Increment stmt_count so we don't
2301 give a second error if this is a nested `if'. */
2302 if (extra_warnings && stmt_count++ == $<itype>1)
2303 warning_with_file_and_line (if_stmt_file, if_stmt_line,
2304 "empty body in an if-statement"); }
2305 /* Make sure c_expand_end_cond is run once
2306 for each call to c_expand_start_cond.
2307 Otherwise a crash is likely. */
2308 | simple_if ELSE error
2309 { c_expand_end_cond (); }
2310 /* We must build the WHILE_STMT node before parsing its
2311 condition so that STMT_LINENO refers to the line
2312 containing the "while", and not the line containing
2313 the close-parenthesis.
2315 c_begin_while_stmt returns the WHILE_STMT node, which
2316 we later pass to c_finish_while_stmt_cond to fill
2317 in the condition and other tidbits. */
2318 | WHILE
2319 { stmt_count++;
2320 $<ttype>$ = c_begin_while_stmt (); }
2321 '(' expr ')'
2322 { $4 = c_common_truthvalue_conversion ($4);
2323 c_finish_while_stmt_cond
2324 (c_common_truthvalue_conversion ($4), $<ttype>2);
2325 $<ttype>$ = add_stmt ($<ttype>2); }
2326 c99_block_lineno_labeled_stmt
2327 { RECHAIN_STMTS ($<ttype>6, WHILE_BODY ($<ttype>6)); }
2328 | do_stmt_start
2329 '(' expr ')' ';'
2330 { DO_COND ($1) = c_common_truthvalue_conversion ($3); }
2331 | do_stmt_start error
2332 { }
2333 | FOR
2334 { $<ttype>$ = build_stmt (FOR_STMT, NULL_TREE, NULL_TREE,
2335 NULL_TREE, NULL_TREE);
2336 add_stmt ($<ttype>$); }
2337 '(' for_init_stmt
2338 { stmt_count++;
2339 RECHAIN_STMTS ($<ttype>2, FOR_INIT_STMT ($<ttype>2)); }
2340 xexpr ';'
2341 { if ($6)
2342 FOR_COND ($<ttype>2)
2343 = c_common_truthvalue_conversion ($6); }
2344 xexpr ')'
2345 { FOR_EXPR ($<ttype>2) = $9; }
2346 c99_block_lineno_labeled_stmt
2347 { RECHAIN_STMTS ($<ttype>2, FOR_BODY ($<ttype>2)); }
2348 | SWITCH '(' expr ')'
2349 { stmt_count++;
2350 $<ttype>$ = c_start_case ($3); }
2351 c99_block_lineno_labeled_stmt
2352 { c_finish_case (); }
2353 ;
2355 for_init_stmt:
2356 xexpr ';'
2357 { add_stmt (build_stmt (EXPR_STMT, $1)); }
2358 | decl
2359 { check_for_loop_decls (); }
2360 ;
2362 /* Parse a single real statement, not including any labels. */
2363 stmt:
2364 compstmt
2365 { stmt_count++; $$ = $1; }
2366 | expr ';'
2367 { stmt_count++;
2368 $$ = c_expand_expr_stmt ($1); }
2369 | c99_block_start select_or_iter_stmt c99_block_end
2370 { if (flag_isoc99)
2371 RECHAIN_STMTS ($1, COMPOUND_BODY ($1));
2372 $$ = NULL_TREE; }
2373 | BREAK ';'
2374 { stmt_count++;
2375 $$ = add_stmt (build_break_stmt ()); }
2376 | CONTINUE ';'
2377 { stmt_count++;
2378 $$ = add_stmt (build_continue_stmt ()); }
2379 | RETURN ';'
2380 { stmt_count++;
2381 $$ = c_expand_return (NULL_TREE); }
2382 | RETURN expr ';'
2383 { stmt_count++;
2384 $$ = c_expand_return ($2); }
2385 | ASM_KEYWORD maybe_type_qual '(' expr ')' ';'
2386 { stmt_count++;
2387 $$ = simple_asm_stmt ($4); }
2388 /* This is the case with just output operands. */
2389 | ASM_KEYWORD maybe_type_qual '(' expr ':' asm_operands ')' ';'
2390 { stmt_count++;
2391 $$ = build_asm_stmt ($2, $4, $6, NULL_TREE, NULL_TREE); }
2392 /* This is the case with input operands as well. */
2393 | ASM_KEYWORD maybe_type_qual '(' expr ':' asm_operands ':'
2394 asm_operands ')' ';'
2395 { stmt_count++;
2396 $$ = build_asm_stmt ($2, $4, $6, $8, NULL_TREE); }
2397 /* This is the case with clobbered registers as well. */
2398 | ASM_KEYWORD maybe_type_qual '(' expr ':' asm_operands ':'
2399 asm_operands ':' asm_clobbers ')' ';'
2400 { stmt_count++;
2401 $$ = build_asm_stmt ($2, $4, $6, $8, $10); }
2402 | GOTO identifier ';'
2403 { tree decl;
2404 stmt_count++;
2405 decl = lookup_label ($2);
2406 if (decl != 0)
2407 {
2408 TREE_USED (decl) = 1;
2409 $$ = add_stmt (build_stmt (GOTO_STMT, decl));
2410 }
2411 else
2412 $$ = NULL_TREE;
2413 }
2414 | GOTO '*' expr ';'
2415 { if (pedantic)
2416 pedwarn ("ISO C forbids `goto *expr;'");
2417 stmt_count++;
2418 $3 = convert (ptr_type_node, $3);
2419 $$ = add_stmt (build_stmt (GOTO_STMT, $3)); }
2420 | ';'
2421 { $$ = NULL_TREE; }
2422 ;
2424 /* Any kind of label, including jump labels and case labels.
2425 ANSI C accepts labels only before statements, but we allow them
2426 also at the end of a compound statement. */
2428 label: CASE expr_no_commas ':'
2429 { stmt_count++;
2430 $$ = do_case ($2, NULL_TREE); }
2431 | CASE expr_no_commas ELLIPSIS expr_no_commas ':'
2432 { stmt_count++;
2433 $$ = do_case ($2, $4); }
2434 | DEFAULT ':'
2435 { stmt_count++;
2436 $$ = do_case (NULL_TREE, NULL_TREE); }
2437 | identifier save_filename save_lineno ':' maybe_attribute
2438 { tree label = define_label ($2, $3, $1);
2439 stmt_count++;
2440 if (label)
2441 {
2442 decl_attributes (&label, $5, 0);
2443 $$ = add_stmt (build_stmt (LABEL_STMT, label));
2444 }
2445 else
2446 $$ = NULL_TREE;
2447 }
2448 ;
2450 /* Either a type-qualifier or nothing. First thing in an `asm' statement. */
2452 maybe_type_qual:
2453 /* empty */
2454 { emit_line_note (input_filename, lineno);
2455 $$ = NULL_TREE; }
2456 | TYPE_QUAL
2457 { emit_line_note (input_filename, lineno); }
2458 ;
2460 xexpr:
2461 /* empty */
2462 { $$ = NULL_TREE; }
2463 | expr
2464 ;
2466 /* These are the operands other than the first string and colon
2467 in asm ("addextend %2,%1": "=dm" (x), "0" (y), "g" (*x)) */
2468 asm_operands: /* empty */
2469 { $$ = NULL_TREE; }
2470 | nonnull_asm_operands
2471 ;
2473 nonnull_asm_operands:
2474 asm_operand
2475 | nonnull_asm_operands ',' asm_operand
2476 { $$ = chainon ($1, $3); }
2477 ;
2479 asm_operand:
2480 STRING '(' expr ')'
2481 { $$ = build_tree_list (build_tree_list (NULL_TREE, $1), $3); }
2482 | '[' identifier ']' STRING '(' expr ')'
2483 { $2 = build_string (IDENTIFIER_LENGTH ($2),
2484 IDENTIFIER_POINTER ($2));
2485 $$ = build_tree_list (build_tree_list ($2, $4), $6); }
2486 ;
2488 asm_clobbers:
2489 STRING
2490 { $$ = tree_cons (NULL_TREE, $1, NULL_TREE); }
2491 | asm_clobbers ',' STRING
2492 { $$ = tree_cons (NULL_TREE, $3, $1); }
2493 ;
2494 \f
2495 /* This is what appears inside the parens in a function declarator.
2496 Its value is a list of ..._TYPE nodes. Attributes must appear here
2497 to avoid a conflict with their appearance after an open parenthesis
2498 in an abstract declarator, as in
2499 "void bar (int (__attribute__((__mode__(SI))) int foo));". */
2500 parmlist:
2501 maybe_attribute
2502 { pushlevel (0);
2503 clear_parm_order ();
2504 declare_parm_level (0); }
2505 parmlist_1
2506 { $$ = $3;
2507 parmlist_tags_warning ();
2508 poplevel (0, 0, 0); }
2509 ;
2511 parmlist_1:
2512 parmlist_2 ')'
2513 | parms ';'
2514 { tree parm;
2515 if (pedantic)
2516 pedwarn ("ISO C forbids forward parameter declarations");
2517 /* Mark the forward decls as such. */
2518 for (parm = getdecls (); parm; parm = TREE_CHAIN (parm))
2519 TREE_ASM_WRITTEN (parm) = 1;
2520 clear_parm_order (); }
2521 maybe_attribute
2522 { /* Dummy action so attributes are in known place
2523 on parser stack. */ }
2524 parmlist_1
2525 { $$ = $6; }
2526 | error ')'
2527 { $$ = tree_cons (NULL_TREE, NULL_TREE, NULL_TREE); }
2528 ;
2530 /* This is what appears inside the parens in a function declarator.
2531 Is value is represented in the format that grokdeclarator expects. */
2532 parmlist_2: /* empty */
2533 { $$ = get_parm_info (0); }
2534 | ELLIPSIS
2535 { $$ = get_parm_info (0);
2536 /* Gcc used to allow this as an extension. However, it does
2537 not work for all targets, and thus has been disabled.
2538 Also, since func (...) and func () are indistinguishable,
2539 it caused problems with the code in expand_builtin which
2540 tries to verify that BUILT_IN_NEXT_ARG is being used
2541 correctly. */
2542 error ("ISO C requires a named argument before `...'");
2543 }
2544 | parms
2545 { $$ = get_parm_info (1); }
2546 | parms ',' ELLIPSIS
2547 { $$ = get_parm_info (0); }
2548 ;
2550 parms:
2551 firstparm
2552 { push_parm_decl ($1); }
2553 | parms ',' parm
2554 { push_parm_decl ($3); }
2555 ;
2557 /* A single parameter declaration or parameter type name,
2558 as found in a parmlist. */
2559 parm:
2560 declspecs_ts setspecs parm_declarator maybe_attribute
2561 { $$ = build_tree_list (build_tree_list (current_declspecs,
2562 $3),
2563 chainon ($4, all_prefix_attributes));
2564 POP_DECLSPEC_STACK; }
2565 | declspecs_ts setspecs notype_declarator maybe_attribute
2566 { $$ = build_tree_list (build_tree_list (current_declspecs,
2567 $3),
2568 chainon ($4, all_prefix_attributes));
2569 POP_DECLSPEC_STACK; }
2570 | declspecs_ts setspecs absdcl_maybe_attribute
2571 { $$ = $3;
2572 POP_DECLSPEC_STACK; }
2573 | declspecs_nots setspecs notype_declarator maybe_attribute
2574 { $$ = build_tree_list (build_tree_list (current_declspecs,
2575 $3),
2576 chainon ($4, all_prefix_attributes));
2577 POP_DECLSPEC_STACK; }
2579 | declspecs_nots setspecs absdcl_maybe_attribute
2580 { $$ = $3;
2581 POP_DECLSPEC_STACK; }
2582 ;
2584 /* The first parm, which must suck attributes from off the top of the parser
2585 stack. */
2586 firstparm:
2587 declspecs_ts_nosa setspecs_fp parm_declarator maybe_attribute
2588 { $$ = build_tree_list (build_tree_list (current_declspecs,
2589 $3),
2590 chainon ($4, all_prefix_attributes));
2591 POP_DECLSPEC_STACK; }
2592 | declspecs_ts_nosa setspecs_fp notype_declarator maybe_attribute
2593 { $$ = build_tree_list (build_tree_list (current_declspecs,
2594 $3),
2595 chainon ($4, all_prefix_attributes));
2596 POP_DECLSPEC_STACK; }
2597 | declspecs_ts_nosa setspecs_fp absdcl_maybe_attribute
2598 { $$ = $3;
2599 POP_DECLSPEC_STACK; }
2600 | declspecs_nots_nosa setspecs_fp notype_declarator maybe_attribute
2601 { $$ = build_tree_list (build_tree_list (current_declspecs,
2602 $3),
2603 chainon ($4, all_prefix_attributes));
2604 POP_DECLSPEC_STACK; }
2606 | declspecs_nots_nosa setspecs_fp absdcl_maybe_attribute
2607 { $$ = $3;
2608 POP_DECLSPEC_STACK; }
2609 ;
2611 setspecs_fp:
2612 setspecs
2613 { prefix_attributes = chainon (prefix_attributes, $<ttype>-2);
2614 all_prefix_attributes = prefix_attributes; }
2615 ;
2617 /* This is used in a function definition
2618 where either a parmlist or an identifier list is ok.
2619 Its value is a list of ..._TYPE nodes or a list of identifiers. */
2620 parmlist_or_identifiers:
2621 maybe_attribute
2622 { pushlevel (0);
2623 clear_parm_order ();
2624 declare_parm_level (1); }
2625 parmlist_or_identifiers_1
2626 { $$ = $3;
2627 parmlist_tags_warning ();
2628 poplevel (0, 0, 0); }
2629 ;
2631 parmlist_or_identifiers_1:
2632 parmlist_1
2633 | identifiers ')'
2634 { tree t;
2635 for (t = $1; t; t = TREE_CHAIN (t))
2636 if (TREE_VALUE (t) == NULL_TREE)
2637 error ("`...' in old-style identifier list");
2638 $$ = tree_cons (NULL_TREE, NULL_TREE, $1);
2640 /* Make sure we have a parmlist after attributes. */
2641 if ($<ttype>-1 != 0
2642 && (TREE_CODE ($$) != TREE_LIST
2643 || TREE_PURPOSE ($$) == 0
2644 || TREE_CODE (TREE_PURPOSE ($$)) != PARM_DECL))
2645 YYERROR1;
2646 }
2647 ;
2649 /* A nonempty list of identifiers. */
2650 identifiers:
2651 IDENTIFIER
2652 { $$ = build_tree_list (NULL_TREE, $1); }
2653 | identifiers ',' IDENTIFIER
2654 { $$ = chainon ($1, build_tree_list (NULL_TREE, $3)); }
2655 ;
2657 /* A nonempty list of identifiers, including typenames. */
2658 identifiers_or_typenames:
2659 identifier
2660 { $$ = build_tree_list (NULL_TREE, $1); }
2661 | identifiers_or_typenames ',' identifier
2662 { $$ = chainon ($1, build_tree_list (NULL_TREE, $3)); }
2663 ;
2665 extension:
2666 EXTENSION
2667 { $$ = SAVE_WARN_FLAGS();
2668 pedantic = 0;
2669 warn_pointer_arith = 0;
2670 warn_traditional = 0; }
2671 ;
2672 \f
2673 ifobjc
2674 /* Objective-C productions. */
2676 objcdef:
2677 classdef
2678 | classdecl
2679 | aliasdecl
2680 | protocoldef
2681 | methoddef
2682 | END
2683 {
2684 if (objc_implementation_context)
2685 {
2686 finish_class (objc_implementation_context);
2687 objc_ivar_chain = NULL_TREE;
2688 objc_implementation_context = NULL_TREE;
2689 }
2690 else
2691 warning ("`@end' must appear in an implementation context");
2692 }
2693 ;
2695 /* A nonempty list of identifiers. */
2696 identifier_list:
2697 identifier
2698 { $$ = build_tree_list (NULL_TREE, $1); }
2699 | identifier_list ',' identifier
2700 { $$ = chainon ($1, build_tree_list (NULL_TREE, $3)); }
2701 ;
2703 classdecl:
2704 CLASS identifier_list ';'
2705 {
2706 objc_declare_class ($2);
2707 }
2709 aliasdecl:
2710 ALIAS identifier identifier ';'
2711 {
2712 objc_declare_alias ($2, $3);
2713 }
2715 classdef:
2716 INTERFACE identifier protocolrefs '{'
2717 {
2718 objc_interface_context = objc_ivar_context
2719 = start_class (CLASS_INTERFACE_TYPE, $2, NULL_TREE, $3);
2720 objc_public_flag = 0;
2721 }
2722 ivar_decl_list '}'
2723 {
2724 continue_class (objc_interface_context);
2725 }
2726 methodprotolist
2727 END
2728 {
2729 finish_class (objc_interface_context);
2730 objc_interface_context = NULL_TREE;
2731 }
2733 | INTERFACE identifier protocolrefs
2734 {
2735 objc_interface_context
2736 = start_class (CLASS_INTERFACE_TYPE, $2, NULL_TREE, $3);
2737 continue_class (objc_interface_context);
2738 }
2739 methodprotolist
2740 END
2741 {
2742 finish_class (objc_interface_context);
2743 objc_interface_context = NULL_TREE;
2744 }
2746 | INTERFACE identifier ':' identifier protocolrefs '{'
2747 {
2748 objc_interface_context = objc_ivar_context
2749 = start_class (CLASS_INTERFACE_TYPE, $2, $4, $5);
2750 objc_public_flag = 0;
2751 }
2752 ivar_decl_list '}'
2753 {
2754 continue_class (objc_interface_context);
2755 }
2756 methodprotolist
2757 END
2758 {
2759 finish_class (objc_interface_context);
2760 objc_interface_context = NULL_TREE;
2761 }
2763 | INTERFACE identifier ':' identifier protocolrefs
2764 {
2765 objc_interface_context
2766 = start_class (CLASS_INTERFACE_TYPE, $2, $4, $5);
2767 continue_class (objc_interface_context);
2768 }
2769 methodprotolist
2770 END
2771 {
2772 finish_class (objc_interface_context);
2773 objc_interface_context = NULL_TREE;
2774 }
2776 | IMPLEMENTATION identifier '{'
2777 {
2778 objc_implementation_context = objc_ivar_context
2779 = start_class (CLASS_IMPLEMENTATION_TYPE, $2, NULL_TREE, NULL_TREE);
2780 objc_public_flag = 0;
2781 }
2782 ivar_decl_list '}'
2783 {
2784 objc_ivar_chain
2785 = continue_class (objc_implementation_context);
2786 }
2788 | IMPLEMENTATION identifier
2789 {
2790 objc_implementation_context
2791 = start_class (CLASS_IMPLEMENTATION_TYPE, $2, NULL_TREE, NULL_TREE);
2792 objc_ivar_chain
2793 = continue_class (objc_implementation_context);
2794 }
2796 | IMPLEMENTATION identifier ':' identifier '{'
2797 {
2798 objc_implementation_context = objc_ivar_context
2799 = start_class (CLASS_IMPLEMENTATION_TYPE, $2, $4, NULL_TREE);
2800 objc_public_flag = 0;
2801 }
2802 ivar_decl_list '}'
2803 {
2804 objc_ivar_chain
2805 = continue_class (objc_implementation_context);
2806 }
2808 | IMPLEMENTATION identifier ':' identifier
2809 {
2810 objc_implementation_context
2811 = start_class (CLASS_IMPLEMENTATION_TYPE, $2, $4, NULL_TREE);
2812 objc_ivar_chain
2813 = continue_class (objc_implementation_context);
2814 }
2816 | INTERFACE identifier '(' identifier ')' protocolrefs
2817 {
2818 objc_interface_context
2819 = start_class (CATEGORY_INTERFACE_TYPE, $2, $4, $6);
2820 continue_class (objc_interface_context);
2821 }
2822 methodprotolist
2823 END
2824 {
2825 finish_class (objc_interface_context);
2826 objc_interface_context = NULL_TREE;
2827 }
2829 | IMPLEMENTATION identifier '(' identifier ')'
2830 {
2831 objc_implementation_context
2832 = start_class (CATEGORY_IMPLEMENTATION_TYPE, $2, $4, NULL_TREE);
2833 objc_ivar_chain
2834 = continue_class (objc_implementation_context);
2835 }
2836 ;
2838 protocoldef:
2839 PROTOCOL identifier protocolrefs
2840 {
2841 objc_pq_context = 1;
2842 objc_interface_context
2843 = start_protocol(PROTOCOL_INTERFACE_TYPE, $2, $3);
2844 }
2845 methodprotolist END
2846 {
2847 objc_pq_context = 0;
2848 finish_protocol(objc_interface_context);
2849 objc_interface_context = NULL_TREE;
2850 }
2851 /* The @protocol forward-declaration production introduces a
2852 reduce/reduce conflict on ';', which should be resolved in
2853 favor of the production 'identifier_list -> identifier'. */
2854 | PROTOCOL identifier_list ';'
2855 {
2856 objc_declare_protocols ($2);
2857 }
2858 ;
2860 protocolrefs:
2861 /* empty */
2862 {
2863 $$ = NULL_TREE;
2864 }
2865 | non_empty_protocolrefs
2866 ;
2868 non_empty_protocolrefs:
2869 ARITHCOMPARE identifier_list ARITHCOMPARE
2870 {
2871 if ($1 == LT_EXPR && $3 == GT_EXPR)
2872 $$ = $2;
2873 else
2874 YYERROR1;
2875 }
2876 ;
2878 ivar_decl_list:
2879 ivar_decl_list visibility_spec ivar_decls
2880 | ivar_decls
2881 ;
2883 visibility_spec:
2884 PRIVATE { objc_public_flag = 2; }
2885 | PROTECTED { objc_public_flag = 0; }
2886 | PUBLIC { objc_public_flag = 1; }
2887 ;
2889 ivar_decls:
2890 /* empty */
2891 {
2892 $$ = NULL_TREE;
2893 }
2894 | ivar_decls ivar_decl ';'
2895 | ivar_decls ';'
2896 {
2897 if (pedantic)
2898 pedwarn ("extra semicolon in struct or union specified");
2899 }
2900 ;
2903 /* There is a shift-reduce conflict here, because `components' may
2904 start with a `typename'. It happens that shifting (the default resolution)
2905 does the right thing, because it treats the `typename' as part of
2906 a `typed_typespecs'.
2908 It is possible that this same technique would allow the distinction
2909 between `notype_initdecls' and `initdecls' to be eliminated.
2910 But I am being cautious and not trying it. */
2912 ivar_decl:
2913 declspecs_nosc_ts setspecs ivars
2914 { $$ = $3;
2915 POP_DECLSPEC_STACK; }
2916 | declspecs_nosc_nots setspecs ivars
2917 { $$ = $3;
2918 POP_DECLSPEC_STACK; }
2919 | error
2920 { $$ = NULL_TREE; }
2921 ;
2923 ivars:
2924 /* empty */
2925 { $$ = NULL_TREE; }
2926 | ivar_declarator
2927 | ivars ',' maybe_resetattrs ivar_declarator
2928 ;
2930 ivar_declarator:
2931 declarator
2932 {
2933 $$ = add_instance_variable (objc_ivar_context,
2934 objc_public_flag,
2935 $1, current_declspecs,
2936 NULL_TREE);
2937 }
2938 | declarator ':' expr_no_commas
2939 {
2940 $$ = add_instance_variable (objc_ivar_context,
2941 objc_public_flag,
2942 $1, current_declspecs, $3);
2943 }
2944 | ':' expr_no_commas
2945 {
2946 $$ = add_instance_variable (objc_ivar_context,
2947 objc_public_flag,
2948 NULL_TREE,
2949 current_declspecs, $2);
2950 }
2951 ;
2953 methodtype:
2954 '+'
2955 { objc_inherit_code = CLASS_METHOD_DECL; }
2956 | '-'
2957 { objc_inherit_code = INSTANCE_METHOD_DECL; }
2958 ;
2960 methoddef:
2961 methodtype
2962 {
2963 objc_pq_context = 1;
2964 if (!objc_implementation_context)
2965 fatal_error ("method definition not in class context");
2966 }
2967 methoddecl
2968 {
2969 objc_pq_context = 0;
2970 if (objc_inherit_code == CLASS_METHOD_DECL)
2971 add_class_method (objc_implementation_context, $3);
2972 else
2973 add_instance_method (objc_implementation_context, $3);
2974 start_method_def ($3);
2975 }
2976 optarglist
2977 {
2978 continue_method_def ();
2979 }
2980 compstmt_or_error
2981 {
2982 finish_method_def ();
2983 }
2984 ;
2986 /* the reason for the strange actions in this rule
2987 is so that notype_initdecls when reached via datadef
2988 can find a valid list of type and sc specs in $0. */
2990 methodprotolist:
2991 /* empty */
2992 | {$<ttype>$ = NULL_TREE; } methodprotolist2
2993 ;
2995 methodprotolist2: /* eliminates a shift/reduce conflict */
2996 methodproto
2997 | datadef
2998 | methodprotolist2 methodproto
2999 | methodprotolist2 {$<ttype>$ = NULL_TREE; } datadef
3000 ;
3002 semi_or_error:
3003 ';'
3004 | error
3005 ;
3007 methodproto:
3008 methodtype
3009 {
3010 /* Remember protocol qualifiers in prototypes. */
3011 objc_pq_context = 1;
3012 }
3013 methoddecl
3014 {
3015 /* Forget protocol qualifiers here. */
3016 objc_pq_context = 0;
3017 if (objc_inherit_code == CLASS_METHOD_DECL)
3018 add_class_method (objc_interface_context, $3);
3019 else
3020 add_instance_method (objc_interface_context, $3);
3021 }
3022 semi_or_error
3023 ;
3025 methoddecl:
3026 '(' typename ')' unaryselector
3027 {
3028 $$ = build_method_decl (objc_inherit_code, $2, $4, NULL_TREE);
3029 }
3031 | unaryselector
3032 {
3033 $$ = build_method_decl (objc_inherit_code, NULL_TREE, $1, NULL_TREE);
3034 }
3036 | '(' typename ')' keywordselector optparmlist
3037 {
3038 $$ = build_method_decl (objc_inherit_code, $2, $4, $5);
3039 }
3041 | keywordselector optparmlist
3042 {
3043 $$ = build_method_decl (objc_inherit_code, NULL_TREE, $1, $2);
3044 }
3045 ;
3047 /* "optarglist" assumes that start_method_def has already been called...
3048 if it is not, the "xdecls" will not be placed in the proper scope */
3050 optarglist:
3051 /* empty */
3052 | ';' myxdecls
3053 ;
3055 /* to get around the following situation: "int foo (int a) int b; {}" that
3056 is synthesized when parsing "- a:a b:b; id c; id d; { ... }" */
3058 myxdecls:
3059 /* empty */
3060 | mydecls
3061 ;
3063 mydecls:
3064 mydecl
3065 | errstmt
3066 | mydecls mydecl
3067 | mydecl errstmt
3068 ;
3070 mydecl:
3071 declspecs_ts setspecs myparms ';'
3072 { POP_DECLSPEC_STACK; }
3073 | declspecs_ts ';'
3074 { shadow_tag ($1); }
3075 | declspecs_nots ';'
3076 { pedwarn ("empty declaration"); }
3077 ;
3079 myparms:
3080 myparm
3081 { push_parm_decl ($1); }
3082 | myparms ',' myparm
3083 { push_parm_decl ($3); }
3084 ;
3086 /* A single parameter declaration or parameter type name,
3087 as found in a parmlist. DOES NOT ALLOW AN INITIALIZER OR ASMSPEC */
3089 myparm:
3090 parm_declarator maybe_attribute
3091 { $$ = build_tree_list (build_tree_list (current_declspecs,
3092 $1),
3093 chainon ($2, all_prefix_attributes)); }
3094 | notype_declarator maybe_attribute
3095 { $$ = build_tree_list (build_tree_list (current_declspecs,
3096 $1),
3097 chainon ($2, all_prefix_attributes)); }
3098 | absdcl_maybe_attribute
3099 { $$ = $1; }
3100 ;
3102 optparmlist:
3103 /* empty */
3104 {
3105 $$ = NULL_TREE;
3106 }
3107 | ',' ELLIPSIS
3108 {
3109 /* oh what a kludge! */
3110 $$ = objc_ellipsis_node;
3111 }
3112 | ','
3113 {
3114 pushlevel (0);
3115 }
3116 parmlist_2
3117 {
3118 /* returns a tree list node generated by get_parm_info */
3119 $$ = $3;
3120 poplevel (0, 0, 0);
3121 }
3122 ;
3124 unaryselector:
3125 selector
3126 ;
3128 keywordselector:
3129 keyworddecl
3131 | keywordselector keyworddecl
3132 {
3133 $$ = chainon ($1, $2);
3134 }
3135 ;
3137 selector:
3138 IDENTIFIER
3139 | TYPENAME
3140 | CLASSNAME
3141 | OBJECTNAME
3142 | reservedwords
3143 ;
3145 reservedwords:
3146 ENUM | STRUCT | UNION | IF | ELSE | WHILE | DO | FOR
3147 | SWITCH | CASE | DEFAULT | BREAK | CONTINUE | RETURN
3148 | GOTO | ASM_KEYWORD | SIZEOF | TYPEOF | ALIGNOF
3149 | TYPESPEC | TYPE_QUAL
3150 ;
3152 keyworddecl:
3153 selector ':' '(' typename ')' identifier
3154 {
3155 $$ = build_keyword_decl ($1, $4, $6);
3156 }
3158 | selector ':' identifier
3159 {
3160 $$ = build_keyword_decl ($1, NULL_TREE, $3);
3161 }
3163 | ':' '(' typename ')' identifier
3164 {
3165 $$ = build_keyword_decl (NULL_TREE, $3, $5);
3166 }
3168 | ':' identifier
3169 {
3170 $$ = build_keyword_decl (NULL_TREE, NULL_TREE, $2);
3171 }
3172 ;
3174 messageargs:
3175 selector
3176 | keywordarglist
3177 ;
3179 keywordarglist:
3180 keywordarg
3181 | keywordarglist keywordarg
3182 {
3183 $$ = chainon ($1, $2);
3184 }
3185 ;
3188 keywordexpr:
3189 nonnull_exprlist
3190 {
3191 if (TREE_CHAIN ($1) == NULL_TREE)
3192 /* just return the expr., remove a level of indirection */
3193 $$ = TREE_VALUE ($1);
3194 else
3195 /* we have a comma expr., we will collapse later */
3196 $$ = $1;
3197 }
3198 ;
3200 keywordarg:
3201 selector ':' keywordexpr
3202 {
3203 $$ = build_tree_list ($1, $3);
3204 }
3205 | ':' keywordexpr
3206 {
3207 $$ = build_tree_list (NULL_TREE, $2);
3208 }
3209 ;
3211 receiver:
3212 expr
3213 | CLASSNAME
3214 {
3215 $$ = get_class_reference ($1);
3216 }
3217 ;
3219 objcmessageexpr:
3220 '['
3221 { objc_receiver_context = 1; }
3222 receiver
3223 { objc_receiver_context = 0; }
3224 messageargs ']'
3225 {
3226 $$ = build_tree_list ($3, $5);
3227 }
3228 ;
3230 selectorarg:
3231 selector
3232 | keywordnamelist
3233 ;
3235 keywordnamelist:
3236 keywordname
3237 | keywordnamelist keywordname
3238 {
3239 $$ = chainon ($1, $2);
3240 }
3241 ;
3243 keywordname:
3244 selector ':'
3245 {
3246 $$ = build_tree_list ($1, NULL_TREE);
3247 }
3248 | ':'
3249 {
3250 $$ = build_tree_list (NULL_TREE, NULL_TREE);
3251 }
3252 ;
3254 objcselectorexpr:
3255 SELECTOR '(' selectorarg ')'
3256 {
3257 $$ = $3;
3258 }
3259 ;
3261 objcprotocolexpr:
3262 PROTOCOL '(' identifier ')'
3263 {
3264 $$ = $3;
3265 }
3266 ;
3268 /* extension to support C-structures in the archiver */
3270 objcencodeexpr:
3271 ENCODE '(' typename ')'
3272 {
3273 $$ = groktypename ($3);
3274 }
3275 ;
3277 end ifobjc
3278 %%
3280 /* yylex() is a thin wrapper around c_lex(), all it does is translate
3281 cpplib.h's token codes into yacc's token codes. */
3283 static enum cpp_ttype last_token;
3285 /* The reserved keyword table. */
3286 struct resword
3287 {
3288 const char *word;
3289 ENUM_BITFIELD(rid) rid : 16;
3290 unsigned int disable : 16;
3291 };
3293 /* Disable mask. Keywords are disabled if (reswords[i].disable & mask) is
3294 _true_. */
3295 #define D_C89 0x01 /* not in C89 */
3296 #define D_EXT 0x02 /* GCC extension */
3297 #define D_EXT89 0x04 /* GCC extension incorporated in C99 */
3298 #define D_OBJC 0x08 /* Objective C only */
3300 static const struct resword reswords[] =
3301 {
3302 { "_Bool", RID_BOOL, 0 },
3303 { "_Complex", RID_COMPLEX, 0 },
3304 { "__FUNCTION__", RID_FUNCTION_NAME, 0 },
3305 { "__PRETTY_FUNCTION__", RID_PRETTY_FUNCTION_NAME, 0 },
3306 { "__alignof", RID_ALIGNOF, 0 },
3307 { "__alignof__", RID_ALIGNOF, 0 },
3308 { "__asm", RID_ASM, 0 },
3309 { "__asm__", RID_ASM, 0 },
3310 { "__attribute", RID_ATTRIBUTE, 0 },
3311 { "__attribute__", RID_ATTRIBUTE, 0 },
3312 { "__bounded", RID_BOUNDED, 0 },
3313 { "__bounded__", RID_BOUNDED, 0 },
3314 { "__builtin_choose_expr", RID_CHOOSE_EXPR, 0 },
3315 { "__builtin_types_compatible_p", RID_TYPES_COMPATIBLE_P, 0 },
3316 { "__builtin_va_arg", RID_VA_ARG, 0 },
3317 { "__complex", RID_COMPLEX, 0 },
3318 { "__complex__", RID_COMPLEX, 0 },
3319 { "__const", RID_CONST, 0 },
3320 { "__const__", RID_CONST, 0 },
3321 { "__extension__", RID_EXTENSION, 0 },
3322 { "__func__", RID_C99_FUNCTION_NAME, 0 },
3323 { "__imag", RID_IMAGPART, 0 },
3324 { "__imag__", RID_IMAGPART, 0 },
3325 { "__inline", RID_INLINE, 0 },
3326 { "__inline__", RID_INLINE, 0 },
3327 { "__label__", RID_LABEL, 0 },
3328 { "__ptrbase", RID_PTRBASE, 0 },
3329 { "__ptrbase__", RID_PTRBASE, 0 },
3330 { "__ptrextent", RID_PTREXTENT, 0 },
3331 { "__ptrextent__", RID_PTREXTENT, 0 },
3332 { "__ptrvalue", RID_PTRVALUE, 0 },
3333 { "__ptrvalue__", RID_PTRVALUE, 0 },
3334 { "__real", RID_REALPART, 0 },
3335 { "__real__", RID_REALPART, 0 },
3336 { "__restrict", RID_RESTRICT, 0 },
3337 { "__restrict__", RID_RESTRICT, 0 },
3338 { "__signed", RID_SIGNED, 0 },
3339 { "__signed__", RID_SIGNED, 0 },
3340 { "__thread", RID_THREAD, 0 },
3341 { "__typeof", RID_TYPEOF, 0 },
3342 { "__typeof__", RID_TYPEOF, 0 },
3343 { "__unbounded", RID_UNBOUNDED, 0 },
3344 { "__unbounded__", RID_UNBOUNDED, 0 },
3345 { "__volatile", RID_VOLATILE, 0 },
3346 { "__volatile__", RID_VOLATILE, 0 },
3347 { "asm", RID_ASM, D_EXT },
3348 { "auto", RID_AUTO, 0 },
3349 { "break", RID_BREAK, 0 },
3350 { "case", RID_CASE, 0 },
3351 { "char", RID_CHAR, 0 },
3352 { "const", RID_CONST, 0 },
3353 { "continue", RID_CONTINUE, 0 },
3354 { "default", RID_DEFAULT, 0 },
3355 { "do", RID_DO, 0 },
3356 { "double", RID_DOUBLE, 0 },
3357 { "else", RID_ELSE, 0 },
3358 { "enum", RID_ENUM, 0 },
3359 { "extern", RID_EXTERN, 0 },
3360 { "float", RID_FLOAT, 0 },
3361 { "for", RID_FOR, 0 },
3362 { "goto", RID_GOTO, 0 },
3363 { "if", RID_IF, 0 },
3364 { "inline", RID_INLINE, D_EXT89 },
3365 { "int", RID_INT, 0 },
3366 { "long", RID_LONG, 0 },
3367 { "register", RID_REGISTER, 0 },
3368 { "restrict", RID_RESTRICT, D_C89 },
3369 { "return", RID_RETURN, 0 },
3370 { "short", RID_SHORT, 0 },
3371 { "signed", RID_SIGNED, 0 },
3372 { "sizeof", RID_SIZEOF, 0 },
3373 { "static", RID_STATIC, 0 },
3374 { "struct", RID_STRUCT, 0 },
3375 { "switch", RID_SWITCH, 0 },
3376 { "typedef", RID_TYPEDEF, 0 },
3377 { "typeof", RID_TYPEOF, D_EXT },
3378 { "union", RID_UNION, 0 },
3379 { "unsigned", RID_UNSIGNED, 0 },
3380 { "void", RID_VOID, 0 },
3381 { "volatile", RID_VOLATILE, 0 },
3382 { "while", RID_WHILE, 0 },
3383 ifobjc
3384 { "id", RID_ID, D_OBJC },
3386 /* These objc keywords are recognized only immediately after
3387 an '@'. */
3388 { "class", RID_AT_CLASS, D_OBJC },
3389 { "compatibility_alias", RID_AT_ALIAS, D_OBJC },
3390 { "defs", RID_AT_DEFS, D_OBJC },
3391 { "encode", RID_AT_ENCODE, D_OBJC },
3392 { "end", RID_AT_END, D_OBJC },
3393 { "implementation", RID_AT_IMPLEMENTATION, D_OBJC },
3394 { "interface", RID_AT_INTERFACE, D_OBJC },
3395 { "private", RID_AT_PRIVATE, D_OBJC },
3396 { "protected", RID_AT_PROTECTED, D_OBJC },
3397 { "protocol", RID_AT_PROTOCOL, D_OBJC },
3398 { "public", RID_AT_PUBLIC, D_OBJC },
3399 { "selector", RID_AT_SELECTOR, D_OBJC },
3401 /* These are recognized only in protocol-qualifier context
3402 (see above) */
3403 { "bycopy", RID_BYCOPY, D_OBJC },
3404 { "byref", RID_BYREF, D_OBJC },
3405 { "in", RID_IN, D_OBJC },
3406 { "inout", RID_INOUT, D_OBJC },
3407 { "oneway", RID_ONEWAY, D_OBJC },
3408 { "out", RID_OUT, D_OBJC },
3409 end ifobjc
3410 };
3411 #define N_reswords (sizeof reswords / sizeof (struct resword))
3413 /* Table mapping from RID_* constants to yacc token numbers.
3414 Unfortunately we have to have entries for all the keywords in all
3415 three languages. */
3416 static const short rid_to_yy[RID_MAX] =
3417 {
3418 /* RID_STATIC */ STATIC,
3419 /* RID_UNSIGNED */ TYPESPEC,
3420 /* RID_LONG */ TYPESPEC,
3421 /* RID_CONST */ TYPE_QUAL,
3422 /* RID_EXTERN */ SCSPEC,
3423 /* RID_REGISTER */ SCSPEC,
3424 /* RID_TYPEDEF */ SCSPEC,
3425 /* RID_SHORT */ TYPESPEC,
3426 /* RID_INLINE */ SCSPEC,
3427 /* RID_VOLATILE */ TYPE_QUAL,
3428 /* RID_SIGNED */ TYPESPEC,
3429 /* RID_AUTO */ SCSPEC,
3430 /* RID_RESTRICT */ TYPE_QUAL,
3432 /* C extensions */
3433 /* RID_BOUNDED */ TYPE_QUAL,
3434 /* RID_UNBOUNDED */ TYPE_QUAL,
3435 /* RID_COMPLEX */ TYPESPEC,
3436 /* RID_THREAD */ SCSPEC,
3438 /* C++ */
3439 /* RID_FRIEND */ 0,
3440 /* RID_VIRTUAL */ 0,
3441 /* RID_EXPLICIT */ 0,
3442 /* RID_EXPORT */ 0,
3443 /* RID_MUTABLE */ 0,
3445 /* ObjC */
3446 /* RID_IN */ TYPE_QUAL,
3447 /* RID_OUT */ TYPE_QUAL,
3448 /* RID_INOUT */ TYPE_QUAL,
3449 /* RID_BYCOPY */ TYPE_QUAL,
3450 /* RID_BYREF */ TYPE_QUAL,
3451 /* RID_ONEWAY */ TYPE_QUAL,
3453 /* C */
3454 /* RID_INT */ TYPESPEC,
3455 /* RID_CHAR */ TYPESPEC,
3456 /* RID_FLOAT */ TYPESPEC,
3457 /* RID_DOUBLE */ TYPESPEC,
3458 /* RID_VOID */ TYPESPEC,
3459 /* RID_ENUM */ ENUM,
3460 /* RID_STRUCT */ STRUCT,
3461 /* RID_UNION */ UNION,
3462 /* RID_IF */ IF,
3463 /* RID_ELSE */ ELSE,
3464 /* RID_WHILE */ WHILE,
3465 /* RID_DO */ DO,
3466 /* RID_FOR */ FOR,
3467 /* RID_SWITCH */ SWITCH,
3468 /* RID_CASE */ CASE,
3469 /* RID_DEFAULT */ DEFAULT,
3470 /* RID_BREAK */ BREAK,
3471 /* RID_CONTINUE */ CONTINUE,
3472 /* RID_RETURN */ RETURN,
3473 /* RID_GOTO */ GOTO,
3474 /* RID_SIZEOF */ SIZEOF,
3476 /* C extensions */
3477 /* RID_ASM */ ASM_KEYWORD,
3478 /* RID_TYPEOF */ TYPEOF,
3479 /* RID_ALIGNOF */ ALIGNOF,
3480 /* RID_ATTRIBUTE */ ATTRIBUTE,
3481 /* RID_VA_ARG */ VA_ARG,
3482 /* RID_EXTENSION */ EXTENSION,
3483 /* RID_IMAGPART */ IMAGPART,
3484 /* RID_REALPART */ REALPART,
3485 /* RID_LABEL */ LABEL,
3486 /* RID_PTRBASE */ PTR_BASE,
3487 /* RID_PTREXTENT */ PTR_EXTENT,
3488 /* RID_PTRVALUE */ PTR_VALUE,
3490 /* RID_CHOOSE_EXPR */ CHOOSE_EXPR,
3491 /* RID_TYPES_COMPATIBLE_P */ TYPES_COMPATIBLE_P,
3493 /* RID_FUNCTION_NAME */ STRING_FUNC_NAME,
3494 /* RID_PRETTY_FUNCTION_NAME */ STRING_FUNC_NAME,
3495 /* RID_C99_FUNCTION_NAME */ VAR_FUNC_NAME,
3497 /* C++ */
3498 /* RID_BOOL */ TYPESPEC,
3499 /* RID_WCHAR */ 0,
3500 /* RID_CLASS */ 0,
3501 /* RID_PUBLIC */ 0,
3502 /* RID_PRIVATE */ 0,
3503 /* RID_PROTECTED */ 0,
3504 /* RID_TEMPLATE */ 0,
3505 /* RID_NULL */ 0,
3506 /* RID_CATCH */ 0,
3507 /* RID_DELETE */ 0,
3508 /* RID_FALSE */ 0,
3509 /* RID_NAMESPACE */ 0,
3510 /* RID_NEW */ 0,
3511 /* RID_OPERATOR */ 0,
3512 /* RID_THIS */ 0,
3513 /* RID_THROW */ 0,
3514 /* RID_TRUE */ 0,
3515 /* RID_TRY */ 0,
3516 /* RID_TYPENAME */ 0,
3517 /* RID_TYPEID */ 0,
3518 /* RID_USING */ 0,
3520 /* casts */
3521 /* RID_CONSTCAST */ 0,
3522 /* RID_DYNCAST */ 0,
3523 /* RID_REINTCAST */ 0,
3524 /* RID_STATCAST */ 0,
3526 /* alternate spellings */
3527 /* RID_AND */ 0,
3528 /* RID_AND_EQ */ 0,
3529 /* RID_NOT */ 0,
3530 /* RID_NOT_EQ */ 0,
3531 /* RID_OR */ 0,
3532 /* RID_OR_EQ */ 0,
3533 /* RID_XOR */ 0,
3534 /* RID_XOR_EQ */ 0,
3535 /* RID_BITAND */ 0,
3536 /* RID_BITOR */ 0,
3537 /* RID_COMPL */ 0,
3539 /* Objective C */
3540 /* RID_ID */ OBJECTNAME,
3541 /* RID_AT_ENCODE */ ENCODE,
3542 /* RID_AT_END */ END,
3543 /* RID_AT_CLASS */ CLASS,
3544 /* RID_AT_ALIAS */ ALIAS,
3545 /* RID_AT_DEFS */ DEFS,
3546 /* RID_AT_PRIVATE */ PRIVATE,
3547 /* RID_AT_PROTECTED */ PROTECTED,
3548 /* RID_AT_PUBLIC */ PUBLIC,
3549 /* RID_AT_PROTOCOL */ PROTOCOL,
3550 /* RID_AT_SELECTOR */ SELECTOR,
3551 /* RID_AT_INTERFACE */ INTERFACE,
3552 /* RID_AT_IMPLEMENTATION */ IMPLEMENTATION
3553 };
3555 static void
3556 init_reswords ()
3557 {
3558 unsigned int i;
3559 tree id;
3560 int mask = (flag_isoc99 ? 0 : D_C89)
3561 | (flag_no_asm ? (flag_isoc99 ? D_EXT : D_EXT|D_EXT89) : 0);
3563 if (c_language != clk_objective_c)
3564 mask |= D_OBJC;
3566 /* It is not necessary to register ridpointers as a GC root, because
3567 all the trees it points to are permanently interned in the
3568 get_identifier hash anyway. */
3569 ridpointers = (tree *) xcalloc ((int) RID_MAX, sizeof (tree));
3570 for (i = 0; i < N_reswords; i++)
3571 {
3572 /* If a keyword is disabled, do not enter it into the table
3573 and so create a canonical spelling that isn't a keyword. */
3574 if (reswords[i].disable & mask)
3575 continue;
3577 id = get_identifier (reswords[i].word);
3578 C_RID_CODE (id) = reswords[i].rid;
3579 C_IS_RESERVED_WORD (id) = 1;
3580 ridpointers [(int) reswords[i].rid] = id;
3581 }
3582 }
3584 #define NAME(type) cpp_type2name (type)
3586 static void
3587 yyerror (msgid)
3588 const char *msgid;
3589 {
3590 const char *string = _(msgid);
3592 if (last_token == CPP_EOF)
3593 error ("%s at end of input", string);
3594 else if (last_token == CPP_CHAR || last_token == CPP_WCHAR)
3595 {
3596 unsigned int val = TREE_INT_CST_LOW (yylval.ttype);
3597 const char *const ell = (last_token == CPP_CHAR) ? "" : "L";
3598 if (val <= UCHAR_MAX && ISGRAPH (val))
3599 error ("%s before %s'%c'", string, ell, val);
3600 else
3601 error ("%s before %s'\\x%x'", string, ell, val);
3602 }
3603 else if (last_token == CPP_STRING
3604 || last_token == CPP_WSTRING)
3605 error ("%s before string constant", string);
3606 else if (last_token == CPP_NUMBER)
3607 error ("%s before numeric constant", string);
3608 else if (last_token == CPP_NAME)
3609 error ("%s before \"%s\"", string, IDENTIFIER_POINTER (yylval.ttype));
3610 else
3611 error ("%s before '%s' token", string, NAME(last_token));
3612 }
3614 static int
3615 yylexname ()
3616 {
3617 tree decl;
3619 ifobjc
3620 int objc_force_identifier = objc_need_raw_identifier;
3621 OBJC_NEED_RAW_IDENTIFIER (0);
3622 end ifobjc
3624 if (C_IS_RESERVED_WORD (yylval.ttype))
3625 {
3626 enum rid rid_code = C_RID_CODE (yylval.ttype);
3628 ifobjc
3629 /* Turn non-typedefed refs to "id" into plain identifiers; this
3630 allows constructs like "void foo(id id);" to work. */
3631 if (rid_code == RID_ID)
3632 {
3633 decl = lookup_name (yylval.ttype);
3634 if (decl == NULL_TREE || TREE_CODE (decl) != TYPE_DECL)
3635 return IDENTIFIER;
3636 }
3638 if (!OBJC_IS_AT_KEYWORD (rid_code)
3639 && (!OBJC_IS_PQ_KEYWORD (rid_code) || objc_pq_context))
3640 end ifobjc
3641 {
3642 int yycode = rid_to_yy[(int) rid_code];
3643 if (yycode == STRING_FUNC_NAME)
3644 {
3645 /* __FUNCTION__ and __PRETTY_FUNCTION__ get converted
3646 to string constants. */
3647 const char *name = fname_string (rid_code);
3649 yylval.ttype = build_string (strlen (name) + 1, name);
3650 C_ARTIFICIAL_STRING_P (yylval.ttype) = 1;
3651 last_token = CPP_STRING; /* so yyerror won't choke */
3652 return STRING;
3653 }
3655 /* Return the canonical spelling for this keyword. */
3656 yylval.ttype = ridpointers[(int) rid_code];
3657 return yycode;
3658 }
3659 }
3661 decl = lookup_name (yylval.ttype);
3662 if (decl)
3663 {
3664 if (TREE_CODE (decl) == TYPE_DECL)
3665 return TYPENAME;
3666 }
3667 ifobjc
3668 else
3669 {
3670 tree objc_interface_decl = is_class_name (yylval.ttype);
3671 /* ObjC class names are in the same namespace as variables and
3672 typedefs, and hence are shadowed by local declarations. */
3673 if (objc_interface_decl
3674 && (global_bindings_p ()
3675 || (!objc_force_identifier && !decl)))
3676 {
3677 yylval.ttype = objc_interface_decl;
3678 return CLASSNAME;
3679 }
3680 }
3681 end ifobjc
3683 return IDENTIFIER;
3684 }
3686 /* Concatenate strings before returning them to the parser. This isn't quite
3687 as good as having it done in the lexer, but it's better than nothing. */
3689 static int
3690 yylexstring ()
3691 {
3692 enum cpp_ttype next_type;
3693 tree orig = yylval.ttype;
3695 next_type = c_lex (&yylval.ttype);
3696 if (next_type == CPP_STRING
3697 || next_type == CPP_WSTRING
3698 || (next_type == CPP_NAME && yylexname () == STRING))
3699 {
3700 varray_type strings;
3702 ifc
3703 static int last_lineno = 0;
3704 static const char *last_input_filename = 0;
3705 if (warn_traditional && !in_system_header
3706 && (lineno != last_lineno || !last_input_filename ||
3707 strcmp (last_input_filename, input_filename)))
3708 {
3709 warning ("traditional C rejects string concatenation");
3710 last_lineno = lineno;
3711 last_input_filename = input_filename;
3712 }
3713 end ifc
3715 VARRAY_TREE_INIT (strings, 32, "strings");
3716 VARRAY_PUSH_TREE (strings, orig);
3718 do
3719 {
3720 VARRAY_PUSH_TREE (strings, yylval.ttype);
3721 next_type = c_lex (&yylval.ttype);
3722 }
3723 while (next_type == CPP_STRING
3724 || next_type == CPP_WSTRING
3725 || (next_type == CPP_NAME && yylexname () == STRING));
3727 yylval.ttype = combine_strings (strings);
3728 }
3729 else
3730 yylval.ttype = orig;
3732 /* We will have always read one token too many. */
3733 _cpp_backup_tokens (parse_in, 1);
3735 return STRING;
3736 }
3738 static inline int
3739 _yylex ()
3740 {
3741 get_next:
3742 last_token = c_lex (&yylval.ttype);
3743 switch (last_token)
3744 {
3745 case CPP_EQ: return '=';
3746 case CPP_NOT: return '!';
3747 case CPP_GREATER: yylval.code = GT_EXPR; return ARITHCOMPARE;
3748 case CPP_LESS: yylval.code = LT_EXPR; return ARITHCOMPARE;
3749 case CPP_PLUS: yylval.code = PLUS_EXPR; return '+';
3750 case CPP_MINUS: yylval.code = MINUS_EXPR; return '-';
3751 case CPP_MULT: yylval.code = MULT_EXPR; return '*';
3752 case CPP_DIV: yylval.code = TRUNC_DIV_EXPR; return '/';
3753 case CPP_MOD: yylval.code = TRUNC_MOD_EXPR; return '%';
3754 case CPP_AND: yylval.code = BIT_AND_EXPR; return '&';
3755 case CPP_OR: yylval.code = BIT_IOR_EXPR; return '|';
3756 case CPP_XOR: yylval.code = BIT_XOR_EXPR; return '^';
3757 case CPP_RSHIFT: yylval.code = RSHIFT_EXPR; return RSHIFT;
3758 case CPP_LSHIFT: yylval.code = LSHIFT_EXPR; return LSHIFT;
3760 case CPP_COMPL: return '~';
3761 case CPP_AND_AND: return ANDAND;
3762 case CPP_OR_OR: return OROR;
3763 case CPP_QUERY: return '?';
3764 case CPP_OPEN_PAREN: return '(';
3765 case CPP_EQ_EQ: yylval.code = EQ_EXPR; return EQCOMPARE;
3766 case CPP_NOT_EQ: yylval.code = NE_EXPR; return EQCOMPARE;
3767 case CPP_GREATER_EQ:yylval.code = GE_EXPR; return ARITHCOMPARE;
3768 case CPP_LESS_EQ: yylval.code = LE_EXPR; return ARITHCOMPARE;
3770 case CPP_PLUS_EQ: yylval.code = PLUS_EXPR; return ASSIGN;
3771 case CPP_MINUS_EQ: yylval.code = MINUS_EXPR; return ASSIGN;
3772 case CPP_MULT_EQ: yylval.code = MULT_EXPR; return ASSIGN;
3773 case CPP_DIV_EQ: yylval.code = TRUNC_DIV_EXPR; return ASSIGN;
3774 case CPP_MOD_EQ: yylval.code = TRUNC_MOD_EXPR; return ASSIGN;
3775 case CPP_AND_EQ: yylval.code = BIT_AND_EXPR; return ASSIGN;
3776 case CPP_OR_EQ: yylval.code = BIT_IOR_EXPR; return ASSIGN;
3777 case CPP_XOR_EQ: yylval.code = BIT_XOR_EXPR; return ASSIGN;
3778 case CPP_RSHIFT_EQ: yylval.code = RSHIFT_EXPR; return ASSIGN;
3779 case CPP_LSHIFT_EQ: yylval.code = LSHIFT_EXPR; return ASSIGN;
3781 case CPP_OPEN_SQUARE: return '[';
3782 case CPP_CLOSE_SQUARE: return ']';
3783 case CPP_OPEN_BRACE: return '{';
3784 case CPP_CLOSE_BRACE: return '}';
3785 case CPP_ELLIPSIS: return ELLIPSIS;
3787 case CPP_PLUS_PLUS: return PLUSPLUS;
3788 case CPP_MINUS_MINUS: return MINUSMINUS;
3789 case CPP_DEREF: return POINTSAT;
3790 case CPP_DOT: return '.';
3792 /* The following tokens may affect the interpretation of any
3793 identifiers following, if doing Objective-C. */
3794 case CPP_COLON: OBJC_NEED_RAW_IDENTIFIER (0); return ':';
3795 case CPP_COMMA: OBJC_NEED_RAW_IDENTIFIER (0); return ',';
3796 case CPP_CLOSE_PAREN: OBJC_NEED_RAW_IDENTIFIER (0); return ')';
3797 case CPP_SEMICOLON: OBJC_NEED_RAW_IDENTIFIER (0); return ';';
3799 case CPP_EOF:
3800 return 0;
3802 case CPP_NAME:
3803 {
3804 int ret = yylexname ();
3805 if (ret == STRING)
3806 return yylexstring ();
3807 else
3808 return ret;
3809 }
3811 case CPP_NUMBER:
3812 case CPP_CHAR:
3813 case CPP_WCHAR:
3814 return CONSTANT;
3816 case CPP_STRING:
3817 case CPP_WSTRING:
3818 return yylexstring ();
3820 /* This token is Objective-C specific. It gives the next token
3821 special significance. */
3822 case CPP_ATSIGN:
3823 ifobjc
3824 {
3825 tree after_at;
3826 enum cpp_ttype after_at_type;
3828 after_at_type = c_lex (&after_at);
3830 if (after_at_type == CPP_NAME
3831 && C_IS_RESERVED_WORD (after_at)
3832 && OBJC_IS_AT_KEYWORD (C_RID_CODE (after_at)))
3833 {
3834 yylval.ttype = after_at;
3835 last_token = after_at_type;
3836 return rid_to_yy [(int) C_RID_CODE (after_at)];
3837 }
3838 _cpp_backup_tokens (parse_in, 1);
3839 return '@';
3840 }
3841 end ifobjc
3843 /* These tokens are C++ specific (and will not be generated
3844 in C mode, but let's be cautious). */
3845 case CPP_SCOPE:
3846 case CPP_DEREF_STAR:
3847 case CPP_DOT_STAR:
3848 case CPP_MIN_EQ:
3849 case CPP_MAX_EQ:
3850 case CPP_MIN:
3851 case CPP_MAX:
3852 /* These tokens should not survive translation phase 4. */
3853 case CPP_HASH:
3854 case CPP_PASTE:
3855 error ("syntax error at '%s' token", NAME(last_token));
3856 goto get_next;
3858 default:
3859 abort ();
3860 }
3861 /* NOTREACHED */
3862 }
3864 static int
3865 yylex()
3866 {
3867 int r;
3868 timevar_push (TV_LEX);
3869 r = _yylex();
3870 timevar_pop (TV_LEX);
3871 return r;
3872 }
3874 /* Function used when yydebug is set, to print a token in more detail. */
3876 static void
3877 yyprint (file, yychar, yyl)
3878 FILE *file;
3879 int yychar;
3880 YYSTYPE yyl;
3881 {
3882 tree t = yyl.ttype;
3884 fprintf (file, " [%s]", NAME(last_token));
3886 switch (yychar)
3887 {
3888 case IDENTIFIER:
3889 case TYPENAME:
3890 case OBJECTNAME:
3891 case TYPESPEC:
3892 case TYPE_QUAL:
3893 case SCSPEC:
3894 case STATIC:
3895 if (IDENTIFIER_POINTER (t))
3896 fprintf (file, " `%s'", IDENTIFIER_POINTER (t));
3897 break;
3899 case CONSTANT:
3900 fprintf (file, " %s", GET_MODE_NAME (TYPE_MODE (TREE_TYPE (t))));
3901 if (TREE_CODE (t) == INTEGER_CST)
3902 fprintf (file,
3903 #if HOST_BITS_PER_WIDE_INT == 64
3904 #if HOST_BITS_PER_WIDE_INT == HOST_BITS_PER_INT
3905 " 0x%x%016x",
3906 #else
3907 #if HOST_BITS_PER_WIDE_INT == HOST_BITS_PER_LONG
3908 " 0x%lx%016lx",
3909 #else
3910 " 0x%llx%016llx",
3911 #endif
3912 #endif
3913 #else
3914 #if HOST_BITS_PER_WIDE_INT != HOST_BITS_PER_INT
3915 " 0x%lx%08lx",
3916 #else
3917 " 0x%x%08x",
3918 #endif
3919 #endif
3920 TREE_INT_CST_HIGH (t), TREE_INT_CST_LOW (t));
3921 break;
3922 }
3923 }
3924 \f
3925 /* This is not the ideal place to put these, but we have to get them out
3926 of c-lex.c because cp/lex.c has its own versions. */
3928 /* Free malloced parser stacks if necessary. */
3930 void
3931 free_parser_stacks ()
3932 {
3933 if (malloced_yyss)
3934 {
3935 free (malloced_yyss);
3936 free (malloced_yyvs);
3937 }
3938 }
3940 #include "gt-c-parse.h"