| blob | 80e4ca862194270958c2dd70d740c08c9ef8c55f |
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-lex.h"
47 #include "c-tree.h"
48 #include "c-pragma.h"
49 #include "flags.h"
50 #include "output.h"
51 #include "toplev.h"
52 #include "ggc.h"
54 #ifdef MULTIBYTE_CHARS
55 #include <locale.h>
56 #endif
58 ifobjc
59 #include "objc-act.h"
60 end ifobjc
62 /* Like YYERROR but do call yyerror. */
63 #define YYERROR1 { yyerror ("syntax error"); YYERROR; }
65 /* Cause the "yydebug" variable to be defined. */
66 #define YYDEBUG 1
68 /* Rename the "yyparse" function so that we can override it elsewhere. */
69 #define yyparse yyparse_1
70 %}
72 %start program
74 %union {long itype; tree ttype; enum tree_code code;
75 const char *filename; int lineno; }
77 /* All identifiers that are not reserved words
78 and are not declared typedefs in the current block */
79 %token IDENTIFIER
81 /* All identifiers that are declared typedefs in the current block.
82 In some contexts, they are treated just like IDENTIFIER,
83 but they can also serve as typespecs in declarations. */
84 %token TYPENAME
86 /* Reserved words that specify storage class.
87 yylval contains an IDENTIFIER_NODE which indicates which one. */
88 %token SCSPEC /* Storage class other than static. */
89 %token STATIC /* Static storage class. */
91 /* Reserved words that specify type.
92 yylval contains an IDENTIFIER_NODE which indicates which one. */
93 %token TYPESPEC
95 /* Reserved words that qualify type: "const", "volatile", or "restrict".
96 yylval contains an IDENTIFIER_NODE which indicates which one. */
97 %token TYPE_QUAL
99 /* Character or numeric constants.
100 yylval is the node for the constant. */
101 %token CONSTANT
103 /* String constants in raw form.
104 yylval is a STRING_CST node. */
105 %token STRING
107 /* "...", used for functions with variable arglists. */
108 %token ELLIPSIS
110 /* the reserved words */
111 /* SCO include files test "ASM", so use something else. */
112 %token SIZEOF ENUM STRUCT UNION IF ELSE WHILE DO FOR SWITCH CASE DEFAULT
113 %token BREAK CONTINUE RETURN GOTO ASM_KEYWORD TYPEOF ALIGNOF
114 %token ATTRIBUTE EXTENSION LABEL
115 %token REALPART IMAGPART VA_ARG CHOOSE_EXPR TYPES_COMPATIBLE_P
116 %token PTR_VALUE PTR_BASE PTR_EXTENT
118 /* function name can be a string const or a var decl. */
119 %token STRING_FUNC_NAME VAR_FUNC_NAME
121 /* Add precedence rules to solve dangling else s/r conflict */
122 %nonassoc IF
123 %nonassoc ELSE
125 /* Define the operator tokens and their precedences.
126 The value is an integer because, if used, it is the tree code
127 to use in the expression made from the operator. */
129 %right <code> ASSIGN '='
130 %right <code> '?' ':'
131 %left <code> OROR
132 %left <code> ANDAND
133 %left <code> '|'
134 %left <code> '^'
135 %left <code> '&'
136 %left <code> EQCOMPARE
137 %left <code> ARITHCOMPARE
138 %left <code> LSHIFT RSHIFT
139 %left <code> '+' '-'
140 %left <code> '*' '/' '%'
141 %right <code> UNARY PLUSPLUS MINUSMINUS
142 %left HYPERUNARY
143 %left <code> POINTSAT '.' '(' '['
145 /* The Objective-C keywords. These are included in C and in
146 Objective C, so that the token codes are the same in both. */
147 %token INTERFACE IMPLEMENTATION END SELECTOR DEFS ENCODE
148 %token CLASSNAME PUBLIC PRIVATE PROTECTED PROTOCOL OBJECTNAME CLASS ALIAS
150 %type <code> unop
151 %type <ttype> ENUM STRUCT UNION IF ELSE WHILE DO FOR SWITCH CASE DEFAULT
152 %type <ttype> BREAK CONTINUE RETURN GOTO ASM_KEYWORD SIZEOF TYPEOF ALIGNOF
154 %type <ttype> identifier IDENTIFIER TYPENAME CONSTANT expr nonnull_exprlist exprlist
155 %type <ttype> expr_no_commas cast_expr unary_expr primary string STRING
156 %type <ttype> declspecs_nosc_nots_nosa_noea declspecs_nosc_nots_nosa_ea
157 %type <ttype> declspecs_nosc_nots_sa_noea declspecs_nosc_nots_sa_ea
158 %type <ttype> declspecs_nosc_ts_nosa_noea declspecs_nosc_ts_nosa_ea
159 %type <ttype> declspecs_nosc_ts_sa_noea declspecs_nosc_ts_sa_ea
160 %type <ttype> declspecs_sc_nots_nosa_noea declspecs_sc_nots_nosa_ea
161 %type <ttype> declspecs_sc_nots_sa_noea declspecs_sc_nots_sa_ea
162 %type <ttype> declspecs_sc_ts_nosa_noea declspecs_sc_ts_nosa_ea
163 %type <ttype> declspecs_sc_ts_sa_noea declspecs_sc_ts_sa_ea
164 %type <ttype> declspecs_ts declspecs_nots
165 %type <ttype> declspecs_ts_nosa declspecs_nots_nosa
166 %type <ttype> declspecs_nosc_ts declspecs_nosc_nots declspecs_nosc declspecs
167 %type <ttype> maybe_type_quals_attrs typespec_nonattr typespec_attr
168 %type <ttype> typespec_reserved_nonattr typespec_reserved_attr
169 %type <ttype> typespec_nonreserved_nonattr
171 %type <ttype> scspec SCSPEC STATIC TYPESPEC TYPE_QUAL maybe_type_qual
172 %type <ttype> initdecls notype_initdecls initdcl notype_initdcl
173 %type <ttype> init maybeasm
174 %type <ttype> asm_operands nonnull_asm_operands asm_operand asm_clobbers
175 %type <ttype> maybe_attribute attributes attribute attribute_list attrib
176 %type <ttype> any_word extension
178 %type <ttype> compstmt compstmt_start compstmt_nostart compstmt_primary_start
179 %type <ttype> do_stmt_start poplevel stmt label
181 %type <ttype> c99_block_start c99_block_end
182 %type <ttype> declarator
183 %type <ttype> notype_declarator after_type_declarator
184 %type <ttype> parm_declarator
185 %type <ttype> parm_declarator_starttypename parm_declarator_nostarttypename
186 %type <ttype> array_declarator
188 %type <ttype> structsp_attr structsp_nonattr
189 %type <ttype> component_decl_list component_decl_list2
190 %type <ttype> component_decl components components_notype component_declarator
191 %type <ttype> component_notype_declarator
192 %type <ttype> enumlist enumerator
193 %type <ttype> struct_head union_head enum_head
194 %type <ttype> typename absdcl absdcl1 absdcl1_ea absdcl1_noea
195 %type <ttype> direct_absdcl1 absdcl_maybe_attribute
196 %type <ttype> xexpr parms parm firstparm identifiers
198 %type <ttype> parmlist parmlist_1 parmlist_2
199 %type <ttype> parmlist_or_identifiers parmlist_or_identifiers_1
200 %type <ttype> identifiers_or_typenames
202 %type <itype> setspecs setspecs_fp
204 %type <filename> save_filename
205 %type <lineno> save_lineno
206 \f
207 ifobjc
208 /* the Objective-C nonterminals */
210 %type <ttype> ivar_decl_list ivar_decls ivar_decl ivars ivar_declarator
211 %type <ttype> methoddecl unaryselector keywordselector selector
212 %type <ttype> keyworddecl receiver objcmessageexpr messageargs
213 %type <ttype> keywordexpr keywordarglist keywordarg
214 %type <ttype> myparms myparm optparmlist reservedwords objcselectorexpr
215 %type <ttype> selectorarg keywordnamelist keywordname objcencodeexpr
216 %type <ttype> objc_string non_empty_protocolrefs protocolrefs identifier_list objcprotocolexpr
218 %type <ttype> CLASSNAME OBJECTNAME
219 end ifobjc
220 \f
221 %{
222 /* Number of statements (loosely speaking) and compound statements
223 seen so far. */
224 static int stmt_count;
225 static int compstmt_count;
227 /* Input file and line number of the end of the body of last simple_if;
228 used by the stmt-rule immediately after simple_if returns. */
229 static const char *if_stmt_file;
230 static int if_stmt_line;
232 /* List of types and structure classes of the current declaration. */
233 static tree current_declspecs = NULL_TREE;
234 static tree prefix_attributes = NULL_TREE;
236 /* List of all the attributes applying to the identifier currently being
237 declared; includes prefix_attributes and possibly some more attributes
238 just after a comma. */
239 static tree all_prefix_attributes = NULL_TREE;
241 /* Stack of saved values of current_declspecs, prefix_attributes and
242 all_prefix_attributes. */
243 static tree declspec_stack;
245 /* PUSH_DECLSPEC_STACK is called from setspecs; POP_DECLSPEC_STACK
246 should be called from the productions making use of setspecs. */
247 #define PUSH_DECLSPEC_STACK \
248 do { \
249 declspec_stack = tree_cons (build_tree_list (prefix_attributes, \
250 all_prefix_attributes), \
251 current_declspecs, \
252 declspec_stack); \
253 } while (0)
255 #define POP_DECLSPEC_STACK \
256 do { \
257 current_declspecs = TREE_VALUE (declspec_stack); \
258 prefix_attributes = TREE_PURPOSE (TREE_PURPOSE (declspec_stack)); \
259 all_prefix_attributes = TREE_VALUE (TREE_PURPOSE (declspec_stack)); \
260 declspec_stack = TREE_CHAIN (declspec_stack); \
261 } while (0)
263 /* For __extension__, save/restore the warning flags which are
264 controlled by __extension__. */
265 #define SAVE_WARN_FLAGS() \
266 size_int (pedantic \
267 | (warn_pointer_arith << 1) \
268 | (warn_traditional << 2))
270 #define RESTORE_WARN_FLAGS(tval) \
271 do { \
272 int val = tree_low_cst (tval, 0); \
273 pedantic = val & 1; \
274 warn_pointer_arith = (val >> 1) & 1; \
275 warn_traditional = (val >> 2) & 1; \
276 } while (0)
278 ifobjc
279 /* Objective-C specific parser/lexer information */
281 static enum tree_code objc_inherit_code;
282 static int objc_pq_context = 0, objc_public_flag = 0;
284 /* The following flag is needed to contextualize ObjC lexical analysis.
285 In some cases (e.g., 'int NSObject;'), it is undesirable to bind
286 an identifier to an ObjC class, even if a class with that name
287 exists. */
288 static int objc_need_raw_identifier;
289 #define OBJC_NEED_RAW_IDENTIFIER(VAL) objc_need_raw_identifier = VAL
290 end ifobjc
292 ifc
293 #define OBJC_NEED_RAW_IDENTIFIER(VAL) /* nothing */
294 end ifc
296 /* Tell yyparse how to print a token's value, if yydebug is set. */
298 #define YYPRINT(FILE,YYCHAR,YYLVAL) yyprint(FILE,YYCHAR,YYLVAL)
300 static void yyprint PARAMS ((FILE *, int, YYSTYPE));
301 static void yyerror PARAMS ((const char *));
302 static int yylexname PARAMS ((void));
303 static inline int _yylex PARAMS ((void));
304 static int yylex PARAMS ((void));
305 static void init_reswords PARAMS ((void));
307 /* Add GC roots for variables local to this file. */
308 void
309 c_parse_init ()
310 {
311 init_reswords ();
313 ggc_add_tree_root (&declspec_stack, 1);
314 ggc_add_tree_root (¤t_declspecs, 1);
315 ggc_add_tree_root (&prefix_attributes, 1);
316 ggc_add_tree_root (&all_prefix_attributes, 1);
317 }
319 %}
320 \f
321 %%
322 program: /* empty */
323 { if (pedantic)
324 pedwarn ("ISO C forbids an empty source file");
325 finish_file ();
326 }
327 | extdefs
328 {
329 /* In case there were missing closebraces,
330 get us back to the global binding level. */
331 while (! global_bindings_p ())
332 poplevel (0, 0, 0);
333 /* __FUNCTION__ is defined at file scope (""). This
334 call may not be necessary as my tests indicate it
335 still works without it. */
336 finish_fname_decls ();
337 finish_file ();
338 }
339 ;
341 /* the reason for the strange actions in this rule
342 is so that notype_initdecls when reached via datadef
343 can find a valid list of type and sc specs in $0. */
345 extdefs:
346 {$<ttype>$ = NULL_TREE; } extdef
347 | extdefs {$<ttype>$ = NULL_TREE; ggc_collect(); } extdef
348 ;
350 extdef:
351 fndef
352 | datadef
353 ifobjc
354 | objcdef
355 end ifobjc
356 | ASM_KEYWORD '(' expr ')' ';'
357 { STRIP_NOPS ($3);
358 if ((TREE_CODE ($3) == ADDR_EXPR
359 && TREE_CODE (TREE_OPERAND ($3, 0)) == STRING_CST)
360 || TREE_CODE ($3) == STRING_CST)
361 assemble_asm ($3);
362 else
363 error ("argument of `asm' is not a constant string"); }
364 | extension extdef
365 { RESTORE_WARN_FLAGS ($1); }
366 ;
368 datadef:
369 setspecs notype_initdecls ';'
370 { if (pedantic)
371 error ("ISO C forbids data definition with no type or storage class");
372 else
373 warning ("data definition has no type or storage class");
375 POP_DECLSPEC_STACK; }
376 | declspecs_nots setspecs notype_initdecls ';'
377 { POP_DECLSPEC_STACK; }
378 | declspecs_ts setspecs initdecls ';'
379 { POP_DECLSPEC_STACK; }
380 | declspecs ';'
381 { shadow_tag ($1); }
382 | error ';'
383 | error '}'
384 | ';'
385 { if (pedantic)
386 pedwarn ("ISO C does not allow extra `;' outside of a function"); }
387 ;
388 \f
389 fndef:
390 declspecs_ts setspecs declarator
391 { if (! start_function (current_declspecs, $3,
392 all_prefix_attributes))
393 YYERROR1;
394 }
395 old_style_parm_decls
396 { store_parm_decls (); }
397 save_filename save_lineno compstmt_or_error
398 { DECL_SOURCE_FILE (current_function_decl) = $7;
399 DECL_SOURCE_LINE (current_function_decl) = $8;
400 finish_function (0);
401 POP_DECLSPEC_STACK; }
402 | declspecs_ts setspecs declarator error
403 { POP_DECLSPEC_STACK; }
404 | declspecs_nots setspecs notype_declarator
405 { if (! start_function (current_declspecs, $3,
406 all_prefix_attributes))
407 YYERROR1;
408 }
409 old_style_parm_decls
410 { store_parm_decls (); }
411 save_filename save_lineno compstmt_or_error
412 { DECL_SOURCE_FILE (current_function_decl) = $7;
413 DECL_SOURCE_LINE (current_function_decl) = $8;
414 finish_function (0);
415 POP_DECLSPEC_STACK; }
416 | declspecs_nots setspecs notype_declarator error
417 { POP_DECLSPEC_STACK; }
418 | setspecs notype_declarator
419 { if (! start_function (NULL_TREE, $2,
420 all_prefix_attributes))
421 YYERROR1;
422 }
423 old_style_parm_decls
424 { store_parm_decls (); }
425 save_filename save_lineno compstmt_or_error
426 { DECL_SOURCE_FILE (current_function_decl) = $6;
427 DECL_SOURCE_LINE (current_function_decl) = $7;
428 finish_function (0);
429 POP_DECLSPEC_STACK; }
430 | setspecs notype_declarator error
431 { POP_DECLSPEC_STACK; }
432 ;
434 identifier:
435 IDENTIFIER
436 | TYPENAME
437 ifobjc
438 | OBJECTNAME
439 | CLASSNAME
440 end ifobjc
441 ;
443 unop: '&'
444 { $$ = ADDR_EXPR; }
445 | '-'
446 { $$ = NEGATE_EXPR; }
447 | '+'
448 { $$ = CONVERT_EXPR;
449 ifc
450 if (warn_traditional && !in_system_header)
451 warning ("traditional C rejects the unary plus operator");
452 end ifc
453 }
454 | PLUSPLUS
455 { $$ = PREINCREMENT_EXPR; }
456 | MINUSMINUS
457 { $$ = PREDECREMENT_EXPR; }
458 | '~'
459 { $$ = BIT_NOT_EXPR; }
460 | '!'
461 { $$ = TRUTH_NOT_EXPR; }
462 ;
464 expr: nonnull_exprlist
465 { $$ = build_compound_expr ($1); }
466 ;
468 exprlist:
469 /* empty */
470 { $$ = NULL_TREE; }
471 | nonnull_exprlist
472 ;
474 nonnull_exprlist:
475 expr_no_commas
476 { $$ = build_tree_list (NULL_TREE, $1); }
477 | nonnull_exprlist ',' expr_no_commas
478 { chainon ($1, build_tree_list (NULL_TREE, $3)); }
479 ;
481 unary_expr:
482 primary
483 | '*' cast_expr %prec UNARY
484 { $$ = build_indirect_ref ($2, "unary *"); }
485 /* __extension__ turns off -pedantic for following primary. */
486 | extension cast_expr %prec UNARY
487 { $$ = $2;
488 RESTORE_WARN_FLAGS ($1); }
489 | unop cast_expr %prec UNARY
490 { $$ = build_unary_op ($1, $2, 0);
491 overflow_warning ($$); }
492 /* Refer to the address of a label as a pointer. */
493 | ANDAND identifier
494 { $$ = finish_label_address_expr ($2); }
495 /* This seems to be impossible on some machines, so let's turn it off.
496 You can use __builtin_next_arg to find the anonymous stack args.
497 | '&' ELLIPSIS
498 { tree types = TYPE_ARG_TYPES (TREE_TYPE (current_function_decl));
499 $$ = error_mark_node;
500 if (TREE_VALUE (tree_last (types)) == void_type_node)
501 error ("`&...' used in function with fixed number of arguments");
502 else
503 {
504 if (pedantic)
505 pedwarn ("ISO C forbids `&...'");
506 $$ = tree_last (DECL_ARGUMENTS (current_function_decl));
507 $$ = build_unary_op (ADDR_EXPR, $$, 0);
508 } }
509 */
510 | sizeof unary_expr %prec UNARY
511 { skip_evaluation--;
512 if (TREE_CODE ($2) == COMPONENT_REF
513 && DECL_C_BIT_FIELD (TREE_OPERAND ($2, 1)))
514 error ("`sizeof' applied to a bit-field");
515 $$ = c_sizeof (TREE_TYPE ($2)); }
516 | sizeof '(' typename ')' %prec HYPERUNARY
517 { skip_evaluation--;
518 $$ = c_sizeof (groktypename ($3)); }
519 | alignof unary_expr %prec UNARY
520 { skip_evaluation--;
521 $$ = c_alignof_expr ($2); }
522 | alignof '(' typename ')' %prec HYPERUNARY
523 { skip_evaluation--;
524 $$ = c_alignof (groktypename ($3)); }
525 | REALPART cast_expr %prec UNARY
526 { $$ = build_unary_op (REALPART_EXPR, $2, 0); }
527 | IMAGPART cast_expr %prec UNARY
528 { $$ = build_unary_op (IMAGPART_EXPR, $2, 0); }
529 ;
531 sizeof:
532 SIZEOF { skip_evaluation++; }
533 ;
535 alignof:
536 ALIGNOF { skip_evaluation++; }
537 ;
539 cast_expr:
540 unary_expr
541 | '(' typename ')' cast_expr %prec UNARY
542 { $$ = c_cast_expr ($2, $4); }
543 ;
545 expr_no_commas:
546 cast_expr
547 | expr_no_commas '+' expr_no_commas
548 { $$ = parser_build_binary_op ($2, $1, $3); }
549 | expr_no_commas '-' expr_no_commas
550 { $$ = parser_build_binary_op ($2, $1, $3); }
551 | expr_no_commas '*' expr_no_commas
552 { $$ = parser_build_binary_op ($2, $1, $3); }
553 | expr_no_commas '/' expr_no_commas
554 { $$ = parser_build_binary_op ($2, $1, $3); }
555 | expr_no_commas '%' expr_no_commas
556 { $$ = parser_build_binary_op ($2, $1, $3); }
557 | expr_no_commas LSHIFT expr_no_commas
558 { $$ = parser_build_binary_op ($2, $1, $3); }
559 | expr_no_commas RSHIFT expr_no_commas
560 { $$ = parser_build_binary_op ($2, $1, $3); }
561 | expr_no_commas ARITHCOMPARE expr_no_commas
562 { $$ = parser_build_binary_op ($2, $1, $3); }
563 | expr_no_commas EQCOMPARE expr_no_commas
564 { $$ = parser_build_binary_op ($2, $1, $3); }
565 | expr_no_commas '&' expr_no_commas
566 { $$ = parser_build_binary_op ($2, $1, $3); }
567 | expr_no_commas '|' expr_no_commas
568 { $$ = parser_build_binary_op ($2, $1, $3); }
569 | expr_no_commas '^' expr_no_commas
570 { $$ = parser_build_binary_op ($2, $1, $3); }
571 | expr_no_commas ANDAND
572 { $1 = truthvalue_conversion (default_conversion ($1));
573 skip_evaluation += $1 == boolean_false_node; }
574 expr_no_commas
575 { skip_evaluation -= $1 == boolean_false_node;
576 $$ = parser_build_binary_op (TRUTH_ANDIF_EXPR, $1, $4); }
577 | expr_no_commas OROR
578 { $1 = truthvalue_conversion (default_conversion ($1));
579 skip_evaluation += $1 == boolean_true_node; }
580 expr_no_commas
581 { skip_evaluation -= $1 == boolean_true_node;
582 $$ = parser_build_binary_op (TRUTH_ORIF_EXPR, $1, $4); }
583 | expr_no_commas '?'
584 { $1 = truthvalue_conversion (default_conversion ($1));
585 skip_evaluation += $1 == boolean_false_node; }
586 expr ':'
587 { skip_evaluation += (($1 == boolean_true_node)
588 - ($1 == boolean_false_node)); }
589 expr_no_commas
590 { skip_evaluation -= $1 == boolean_true_node;
591 $$ = build_conditional_expr ($1, $4, $7); }
592 | expr_no_commas '?'
593 { if (pedantic)
594 pedwarn ("ISO C forbids omitting the middle term of a ?: expression");
595 /* Make sure first operand is calculated only once. */
596 $<ttype>2 = save_expr ($1);
597 $1 = truthvalue_conversion (default_conversion ($<ttype>2));
598 skip_evaluation += $1 == boolean_true_node; }
599 ':' expr_no_commas
600 { skip_evaluation -= $1 == boolean_true_node;
601 $$ = build_conditional_expr ($1, $<ttype>2, $5); }
602 | expr_no_commas '=' expr_no_commas
603 { char class;
604 $$ = build_modify_expr ($1, NOP_EXPR, $3);
605 class = TREE_CODE_CLASS (TREE_CODE ($$));
606 if (IS_EXPR_CODE_CLASS (class))
607 C_SET_EXP_ORIGINAL_CODE ($$, MODIFY_EXPR);
608 }
609 | expr_no_commas ASSIGN expr_no_commas
610 { char class;
611 $$ = build_modify_expr ($1, $2, $3);
612 /* This inhibits warnings in truthvalue_conversion. */
613 class = TREE_CODE_CLASS (TREE_CODE ($$));
614 if (IS_EXPR_CODE_CLASS (class))
615 C_SET_EXP_ORIGINAL_CODE ($$, ERROR_MARK);
616 }
617 ;
619 primary:
620 IDENTIFIER
621 {
622 if (yychar == YYEMPTY)
623 yychar = YYLEX;
624 $$ = build_external_ref ($1, yychar == '(');
625 }
626 | CONSTANT
627 | string
628 { $$ = combine_strings ($1); }
629 | VAR_FUNC_NAME
630 { $$ = fname_decl (C_RID_CODE ($$), $$); }
631 | '(' typename ')' '{'
632 { start_init (NULL_TREE, NULL, 0);
633 $2 = groktypename ($2);
634 really_start_incremental_init ($2); }
635 initlist_maybe_comma '}' %prec UNARY
636 { tree constructor = pop_init_level (0);
637 tree type = $2;
638 finish_init ();
640 if (pedantic && ! flag_isoc99)
641 pedwarn ("ISO C89 forbids compound literals");
642 $$ = build_compound_literal (type, constructor);
643 }
644 | '(' expr ')'
645 { char class = TREE_CODE_CLASS (TREE_CODE ($2));
646 if (IS_EXPR_CODE_CLASS (class))
647 C_SET_EXP_ORIGINAL_CODE ($2, ERROR_MARK);
648 $$ = $2; }
649 | '(' error ')'
650 { $$ = error_mark_node; }
651 | compstmt_primary_start compstmt_nostart ')'
652 { tree saved_last_tree;
654 if (pedantic)
655 pedwarn ("ISO C forbids braced-groups within expressions");
656 pop_label_level ();
658 saved_last_tree = COMPOUND_BODY ($1);
659 RECHAIN_STMTS ($1, COMPOUND_BODY ($1));
660 last_tree = saved_last_tree;
661 TREE_CHAIN (last_tree) = NULL_TREE;
662 if (!last_expr_type)
663 last_expr_type = void_type_node;
664 $$ = build1 (STMT_EXPR, last_expr_type, $1);
665 TREE_SIDE_EFFECTS ($$) = 1;
666 }
667 | compstmt_primary_start error ')'
668 {
669 pop_label_level ();
670 last_tree = COMPOUND_BODY ($1);
671 TREE_CHAIN (last_tree) = NULL_TREE;
672 $$ = error_mark_node;
673 }
674 | primary '(' exprlist ')' %prec '.'
675 { $$ = build_function_call ($1, $3); }
676 | VA_ARG '(' expr_no_commas ',' typename ')'
677 { $$ = build_va_arg ($3, groktypename ($5)); }
679 | CHOOSE_EXPR '(' expr_no_commas ',' expr_no_commas ',' expr_no_commas ')'
680 {
681 tree c;
683 c = fold ($3);
684 STRIP_NOPS (c);
685 if (TREE_CODE (c) != INTEGER_CST)
686 error ("first argument to __builtin_choose_expr not a constant");
687 $$ = integer_zerop (c) ? $7 : $5;
688 }
689 | TYPES_COMPATIBLE_P '(' typename ',' typename ')'
690 {
691 tree e1, e2;
693 e1 = TYPE_MAIN_VARIANT (groktypename ($3));
694 e2 = TYPE_MAIN_VARIANT (groktypename ($5));
696 $$ = comptypes (e1, e2)
697 ? build_int_2 (1, 0) : build_int_2 (0, 0);
698 }
699 | primary '[' expr ']' %prec '.'
700 { $$ = build_array_ref ($1, $3); }
701 | primary '.' identifier
702 {
703 ifobjc
704 if (!is_public ($1, $3))
705 $$ = error_mark_node;
706 else
707 end ifobjc
708 $$ = build_component_ref ($1, $3);
709 }
710 | primary POINTSAT identifier
711 {
712 tree expr = build_indirect_ref ($1, "->");
714 ifobjc
715 if (!is_public (expr, $3))
716 $$ = error_mark_node;
717 else
718 end ifobjc
719 $$ = build_component_ref (expr, $3);
720 }
721 | primary PLUSPLUS
722 { $$ = build_unary_op (POSTINCREMENT_EXPR, $1, 0); }
723 | primary MINUSMINUS
724 { $$ = build_unary_op (POSTDECREMENT_EXPR, $1, 0); }
725 ifobjc
726 | objcmessageexpr
727 { $$ = build_message_expr ($1); }
728 | objcselectorexpr
729 { $$ = build_selector_expr ($1); }
730 | objcprotocolexpr
731 { $$ = build_protocol_expr ($1); }
732 | objcencodeexpr
733 { $$ = build_encode_expr ($1); }
734 | objc_string
735 { $$ = build_objc_string_object ($1); }
736 end ifobjc
737 ;
739 /* Produces a STRING_CST with perhaps more STRING_CSTs chained onto it. */
740 string:
741 STRING
742 | string STRING
743 {
744 ifc
745 static int last_lineno = 0;
746 static const char *last_input_filename = 0;
747 end ifc
748 $$ = chainon ($1, $2);
749 ifc
750 if (warn_traditional && !in_system_header
751 && (lineno != last_lineno || !last_input_filename ||
752 strcmp (last_input_filename, input_filename)))
753 {
754 warning ("traditional C rejects string concatenation");
755 last_lineno = lineno;
756 last_input_filename = input_filename;
757 }
758 end ifc
759 }
760 ;
762 ifobjc
763 /* Produces an STRING_CST with perhaps more STRING_CSTs chained
764 onto it, which is to be read as an ObjC string object. */
765 objc_string:
766 '@' STRING
767 { $$ = $2; }
768 | objc_string '@' STRING
769 { $$ = chainon ($1, $3); }
770 ;
771 end ifobjc
773 old_style_parm_decls:
774 /* empty */
775 | datadecls
776 | datadecls ELLIPSIS
777 /* ... is used here to indicate a varargs function. */
778 { c_mark_varargs ();
779 if (pedantic)
780 pedwarn ("ISO C does not permit use of `varargs.h'"); }
781 ;
783 /* The following are analogous to lineno_decl, decls and decl
784 except that they do not allow nested functions.
785 They are used for old-style parm decls. */
786 lineno_datadecl:
787 save_filename save_lineno datadecl
788 { }
789 ;
791 datadecls:
792 lineno_datadecl
793 | errstmt
794 | datadecls lineno_datadecl
795 | lineno_datadecl errstmt
796 ;
798 /* We don't allow prefix attributes here because they cause reduce/reduce
799 conflicts: we can't know whether we're parsing a function decl with
800 attribute suffix, or function defn with attribute prefix on first old
801 style parm. */
802 datadecl:
803 declspecs_ts_nosa setspecs initdecls ';'
804 { POP_DECLSPEC_STACK; }
805 | declspecs_nots_nosa setspecs notype_initdecls ';'
806 { POP_DECLSPEC_STACK; }
807 | declspecs_ts_nosa ';'
808 { shadow_tag_warned ($1, 1);
809 pedwarn ("empty declaration"); }
810 | declspecs_nots_nosa ';'
811 { pedwarn ("empty declaration"); }
812 ;
814 /* This combination which saves a lineno before a decl
815 is the normal thing to use, rather than decl itself.
816 This is to avoid shift/reduce conflicts in contexts
817 where statement labels are allowed. */
818 lineno_decl:
819 save_filename save_lineno decl
820 { }
821 ;
823 /* records the type and storage class specs to use for processing
824 the declarators that follow.
825 Maintains a stack of outer-level values of current_declspecs,
826 for the sake of parm declarations nested in function declarators. */
827 setspecs: /* empty */
828 { pending_xref_error ();
829 PUSH_DECLSPEC_STACK;
830 split_specs_attrs ($<ttype>0,
831 ¤t_declspecs, &prefix_attributes);
832 all_prefix_attributes = prefix_attributes; }
833 ;
835 /* Possibly attributes after a comma, which should reset all_prefix_attributes
836 to prefix_attributes with these ones chained on the front. */
837 maybe_resetattrs:
838 maybe_attribute
839 { all_prefix_attributes = chainon ($1, prefix_attributes); }
840 ;
842 decl:
843 declspecs_ts setspecs initdecls ';'
844 { POP_DECLSPEC_STACK; }
845 | declspecs_nots setspecs notype_initdecls ';'
846 { POP_DECLSPEC_STACK; }
847 | declspecs_ts setspecs nested_function
848 { POP_DECLSPEC_STACK; }
849 | declspecs_nots setspecs notype_nested_function
850 { POP_DECLSPEC_STACK; }
851 | declspecs ';'
852 { shadow_tag ($1); }
853 | extension decl
854 { RESTORE_WARN_FLAGS ($1); }
855 ;
857 /* A list of declaration specifiers. These are:
859 - Storage class specifiers (scspec), which for GCC currently includes
860 function specifiers ("inline").
862 - Type specifiers (typespec_*).
864 - Type qualifiers (TYPE_QUAL).
866 - Attribute specifier lists (attributes).
868 These are stored as a TREE_LIST; the head of the list is the last
869 item in the specifier list. Each entry in the list has either a
870 TREE_PURPOSE that is an attribute specifier list, or a TREE_VALUE that
871 is a single other specifier or qualifier; and a TREE_CHAIN that is the
872 rest of the list. TREE_STATIC is set on the list if something other
873 than a storage class specifier or attribute has been seen; this is used
874 to warn for the obsolescent usage of storage class specifiers other than
875 at the start of the list. (Doing this properly would require function
876 specifiers to be handled separately from storage class specifiers.)
878 The various cases below are classified according to:
880 (a) Whether a storage class specifier is included or not; some
881 places in the grammar disallow storage class specifiers (_sc or _nosc).
883 (b) Whether a type specifier has been seen; after a type specifier,
884 a typedef name is an identifier to redeclare (_ts or _nots).
886 (c) Whether the list starts with an attribute; in certain places,
887 the grammar requires specifiers that don't start with an attribute
888 (_sa or _nosa).
890 (d) Whether the list ends with an attribute (or a specifier such that
891 any following attribute would have been parsed as part of that specifier);
892 this avoids shift-reduce conflicts in the parsing of attributes
893 (_ea or _noea).
895 TODO:
897 (i) Distinguish between function specifiers and storage class specifiers,
898 at least for the purpose of warnings about obsolescent usage.
900 (ii) Halve the number of productions here by eliminating the _sc/_nosc
901 distinction and instead checking where required that storage class
902 specifiers aren't present. */
904 /* Declspecs which contain at least one type specifier or typedef name.
905 (Just `const' or `volatile' is not enough.)
906 A typedef'd name following these is taken as a name to be declared.
907 Declspecs have a non-NULL TREE_VALUE, attributes do not. */
909 declspecs_nosc_nots_nosa_noea:
910 TYPE_QUAL
911 { $$ = tree_cons (NULL_TREE, $1, NULL_TREE);
912 TREE_STATIC ($$) = 1; }
913 | declspecs_nosc_nots_nosa_noea TYPE_QUAL
914 { $$ = tree_cons (NULL_TREE, $2, $1);
915 TREE_STATIC ($$) = 1; }
916 | declspecs_nosc_nots_nosa_ea TYPE_QUAL
917 { $$ = tree_cons (NULL_TREE, $2, $1);
918 TREE_STATIC ($$) = 1; }
919 ;
921 declspecs_nosc_nots_nosa_ea:
922 declspecs_nosc_nots_nosa_noea attributes
923 { $$ = tree_cons ($2, NULL_TREE, $1);
924 TREE_STATIC ($$) = TREE_STATIC ($1); }
925 ;
927 declspecs_nosc_nots_sa_noea:
928 declspecs_nosc_nots_sa_noea TYPE_QUAL
929 { $$ = tree_cons (NULL_TREE, $2, $1);
930 TREE_STATIC ($$) = 1; }
931 | declspecs_nosc_nots_sa_ea TYPE_QUAL
932 { $$ = tree_cons (NULL_TREE, $2, $1);
933 TREE_STATIC ($$) = 1; }
934 ;
936 declspecs_nosc_nots_sa_ea:
937 attributes
938 { $$ = tree_cons ($1, NULL_TREE, NULL_TREE);
939 TREE_STATIC ($$) = 0; }
940 | declspecs_nosc_nots_sa_noea attributes
941 { $$ = tree_cons ($2, NULL_TREE, $1);
942 TREE_STATIC ($$) = TREE_STATIC ($1); }
943 ;
945 declspecs_nosc_ts_nosa_noea:
946 typespec_nonattr
947 { $$ = tree_cons (NULL_TREE, $1, NULL_TREE);
948 TREE_STATIC ($$) = 1; }
949 | declspecs_nosc_ts_nosa_noea TYPE_QUAL
950 { $$ = tree_cons (NULL_TREE, $2, $1);
951 TREE_STATIC ($$) = 1; }
952 | declspecs_nosc_ts_nosa_ea TYPE_QUAL
953 { $$ = tree_cons (NULL_TREE, $2, $1);
954 TREE_STATIC ($$) = 1; }
955 | declspecs_nosc_ts_nosa_noea typespec_reserved_nonattr
956 { $$ = tree_cons (NULL_TREE, $2, $1);
957 TREE_STATIC ($$) = 1; }
958 | declspecs_nosc_ts_nosa_ea typespec_reserved_nonattr
959 { $$ = tree_cons (NULL_TREE, $2, $1);
960 TREE_STATIC ($$) = 1; }
961 | declspecs_nosc_nots_nosa_noea typespec_nonattr
962 { $$ = tree_cons (NULL_TREE, $2, $1);
963 TREE_STATIC ($$) = 1; }
964 | declspecs_nosc_nots_nosa_ea typespec_nonattr
965 { $$ = tree_cons (NULL_TREE, $2, $1);
966 TREE_STATIC ($$) = 1; }
967 ;
969 declspecs_nosc_ts_nosa_ea:
970 typespec_attr
971 { $$ = tree_cons (NULL_TREE, $1, NULL_TREE);
972 TREE_STATIC ($$) = 1; }
973 | declspecs_nosc_ts_nosa_noea attributes
974 { $$ = tree_cons ($2, NULL_TREE, $1);
975 TREE_STATIC ($$) = TREE_STATIC ($1); }
976 | declspecs_nosc_ts_nosa_noea typespec_reserved_attr
977 { $$ = tree_cons (NULL_TREE, $2, $1);
978 TREE_STATIC ($$) = 1; }
979 | declspecs_nosc_ts_nosa_ea typespec_reserved_attr
980 { $$ = tree_cons (NULL_TREE, $2, $1);
981 TREE_STATIC ($$) = 1; }
982 | declspecs_nosc_nots_nosa_noea typespec_attr
983 { $$ = tree_cons (NULL_TREE, $2, $1);
984 TREE_STATIC ($$) = 1; }
985 | declspecs_nosc_nots_nosa_ea typespec_attr
986 { $$ = tree_cons (NULL_TREE, $2, $1);
987 TREE_STATIC ($$) = 1; }
988 ;
990 declspecs_nosc_ts_sa_noea:
991 declspecs_nosc_ts_sa_noea TYPE_QUAL
992 { $$ = tree_cons (NULL_TREE, $2, $1);
993 TREE_STATIC ($$) = 1; }
994 | declspecs_nosc_ts_sa_ea TYPE_QUAL
995 { $$ = tree_cons (NULL_TREE, $2, $1);
996 TREE_STATIC ($$) = 1; }
997 | declspecs_nosc_ts_sa_noea typespec_reserved_nonattr
998 { $$ = tree_cons (NULL_TREE, $2, $1);
999 TREE_STATIC ($$) = 1; }
1000 | declspecs_nosc_ts_sa_ea typespec_reserved_nonattr
1001 { $$ = tree_cons (NULL_TREE, $2, $1);
1002 TREE_STATIC ($$) = 1; }
1003 | declspecs_nosc_nots_sa_noea typespec_nonattr
1004 { $$ = tree_cons (NULL_TREE, $2, $1);
1005 TREE_STATIC ($$) = 1; }
1006 | declspecs_nosc_nots_sa_ea typespec_nonattr
1007 { $$ = tree_cons (NULL_TREE, $2, $1);
1008 TREE_STATIC ($$) = 1; }
1009 ;
1011 declspecs_nosc_ts_sa_ea:
1012 declspecs_nosc_ts_sa_noea attributes
1013 { $$ = tree_cons ($2, NULL_TREE, $1);
1014 TREE_STATIC ($$) = TREE_STATIC ($1); }
1015 | declspecs_nosc_ts_sa_noea typespec_reserved_attr
1016 { $$ = tree_cons (NULL_TREE, $2, $1);
1017 TREE_STATIC ($$) = 1; }
1018 | declspecs_nosc_ts_sa_ea typespec_reserved_attr
1019 { $$ = tree_cons (NULL_TREE, $2, $1);
1020 TREE_STATIC ($$) = 1; }
1021 | declspecs_nosc_nots_sa_noea typespec_attr
1022 { $$ = tree_cons (NULL_TREE, $2, $1);
1023 TREE_STATIC ($$) = 1; }
1024 | declspecs_nosc_nots_sa_ea typespec_attr
1025 { $$ = tree_cons (NULL_TREE, $2, $1);
1026 TREE_STATIC ($$) = 1; }
1027 ;
1029 declspecs_sc_nots_nosa_noea:
1030 scspec
1031 { $$ = tree_cons (NULL_TREE, $1, NULL_TREE);
1032 TREE_STATIC ($$) = 0; }
1033 | declspecs_sc_nots_nosa_noea TYPE_QUAL
1034 { $$ = tree_cons (NULL_TREE, $2, $1);
1035 TREE_STATIC ($$) = 1; }
1036 | declspecs_sc_nots_nosa_ea TYPE_QUAL
1037 { $$ = tree_cons (NULL_TREE, $2, $1);
1038 TREE_STATIC ($$) = 1; }
1039 | declspecs_nosc_nots_nosa_noea scspec
1040 { if (extra_warnings && TREE_STATIC ($1))
1041 warning ("`%s' is not at beginning of declaration",
1042 IDENTIFIER_POINTER ($2));
1043 $$ = tree_cons (NULL_TREE, $2, $1);
1044 TREE_STATIC ($$) = TREE_STATIC ($1); }
1045 | declspecs_nosc_nots_nosa_ea scspec
1046 { if (extra_warnings && TREE_STATIC ($1))
1047 warning ("`%s' is not at beginning of declaration",
1048 IDENTIFIER_POINTER ($2));
1049 $$ = tree_cons (NULL_TREE, $2, $1);
1050 TREE_STATIC ($$) = TREE_STATIC ($1); }
1051 | declspecs_sc_nots_nosa_noea scspec
1052 { if (extra_warnings && TREE_STATIC ($1))
1053 warning ("`%s' is not at beginning of declaration",
1054 IDENTIFIER_POINTER ($2));
1055 $$ = tree_cons (NULL_TREE, $2, $1);
1056 TREE_STATIC ($$) = TREE_STATIC ($1); }
1057 | declspecs_sc_nots_nosa_ea scspec
1058 { if (extra_warnings && TREE_STATIC ($1))
1059 warning ("`%s' is not at beginning of declaration",
1060 IDENTIFIER_POINTER ($2));
1061 $$ = tree_cons (NULL_TREE, $2, $1);
1062 TREE_STATIC ($$) = TREE_STATIC ($1); }
1063 ;
1065 declspecs_sc_nots_nosa_ea:
1066 declspecs_sc_nots_nosa_noea attributes
1067 { $$ = tree_cons ($2, NULL_TREE, $1);
1068 TREE_STATIC ($$) = TREE_STATIC ($1); }
1069 ;
1071 declspecs_sc_nots_sa_noea:
1072 declspecs_sc_nots_sa_noea TYPE_QUAL
1073 { $$ = tree_cons (NULL_TREE, $2, $1);
1074 TREE_STATIC ($$) = 1; }
1075 | declspecs_sc_nots_sa_ea TYPE_QUAL
1076 { $$ = tree_cons (NULL_TREE, $2, $1);
1077 TREE_STATIC ($$) = 1; }
1078 | declspecs_nosc_nots_sa_noea scspec
1079 { if (extra_warnings && TREE_STATIC ($1))
1080 warning ("`%s' is not at beginning of declaration",
1081 IDENTIFIER_POINTER ($2));
1082 $$ = tree_cons (NULL_TREE, $2, $1);
1083 TREE_STATIC ($$) = TREE_STATIC ($1); }
1084 | declspecs_nosc_nots_sa_ea scspec
1085 { if (extra_warnings && TREE_STATIC ($1))
1086 warning ("`%s' is not at beginning of declaration",
1087 IDENTIFIER_POINTER ($2));
1088 $$ = tree_cons (NULL_TREE, $2, $1);
1089 TREE_STATIC ($$) = TREE_STATIC ($1); }
1090 | declspecs_sc_nots_sa_noea scspec
1091 { if (extra_warnings && TREE_STATIC ($1))
1092 warning ("`%s' is not at beginning of declaration",
1093 IDENTIFIER_POINTER ($2));
1094 $$ = tree_cons (NULL_TREE, $2, $1);
1095 TREE_STATIC ($$) = TREE_STATIC ($1); }
1096 | declspecs_sc_nots_sa_ea scspec
1097 { if (extra_warnings && TREE_STATIC ($1))
1098 warning ("`%s' is not at beginning of declaration",
1099 IDENTIFIER_POINTER ($2));
1100 $$ = tree_cons (NULL_TREE, $2, $1);
1101 TREE_STATIC ($$) = TREE_STATIC ($1); }
1102 ;
1104 declspecs_sc_nots_sa_ea:
1105 declspecs_sc_nots_sa_noea attributes
1106 { $$ = tree_cons ($2, NULL_TREE, $1);
1107 TREE_STATIC ($$) = TREE_STATIC ($1); }
1108 ;
1110 declspecs_sc_ts_nosa_noea:
1111 declspecs_sc_ts_nosa_noea TYPE_QUAL
1112 { $$ = tree_cons (NULL_TREE, $2, $1);
1113 TREE_STATIC ($$) = 1; }
1114 | declspecs_sc_ts_nosa_ea TYPE_QUAL
1115 { $$ = tree_cons (NULL_TREE, $2, $1);
1116 TREE_STATIC ($$) = 1; }
1117 | declspecs_sc_ts_nosa_noea typespec_reserved_nonattr
1118 { $$ = tree_cons (NULL_TREE, $2, $1);
1119 TREE_STATIC ($$) = 1; }
1120 | declspecs_sc_ts_nosa_ea typespec_reserved_nonattr
1121 { $$ = tree_cons (NULL_TREE, $2, $1);
1122 TREE_STATIC ($$) = 1; }
1123 | declspecs_sc_nots_nosa_noea typespec_nonattr
1124 { $$ = tree_cons (NULL_TREE, $2, $1);
1125 TREE_STATIC ($$) = 1; }
1126 | declspecs_sc_nots_nosa_ea typespec_nonattr
1127 { $$ = tree_cons (NULL_TREE, $2, $1);
1128 TREE_STATIC ($$) = 1; }
1129 | declspecs_nosc_ts_nosa_noea scspec
1130 { if (extra_warnings && TREE_STATIC ($1))
1131 warning ("`%s' is not at beginning of declaration",
1132 IDENTIFIER_POINTER ($2));
1133 $$ = tree_cons (NULL_TREE, $2, $1);
1134 TREE_STATIC ($$) = TREE_STATIC ($1); }
1135 | declspecs_nosc_ts_nosa_ea scspec
1136 { if (extra_warnings && TREE_STATIC ($1))
1137 warning ("`%s' is not at beginning of declaration",
1138 IDENTIFIER_POINTER ($2));
1139 $$ = tree_cons (NULL_TREE, $2, $1);
1140 TREE_STATIC ($$) = TREE_STATIC ($1); }
1141 | declspecs_sc_ts_nosa_noea scspec
1142 { if (extra_warnings && TREE_STATIC ($1))
1143 warning ("`%s' is not at beginning of declaration",
1144 IDENTIFIER_POINTER ($2));
1145 $$ = tree_cons (NULL_TREE, $2, $1);
1146 TREE_STATIC ($$) = TREE_STATIC ($1); }
1147 | declspecs_sc_ts_nosa_ea scspec
1148 { if (extra_warnings && TREE_STATIC ($1))
1149 warning ("`%s' is not at beginning of declaration",
1150 IDENTIFIER_POINTER ($2));
1151 $$ = tree_cons (NULL_TREE, $2, $1);
1152 TREE_STATIC ($$) = TREE_STATIC ($1); }
1153 ;
1155 declspecs_sc_ts_nosa_ea:
1156 declspecs_sc_ts_nosa_noea attributes
1157 { $$ = tree_cons ($2, NULL_TREE, $1);
1158 TREE_STATIC ($$) = TREE_STATIC ($1); }
1159 | declspecs_sc_ts_nosa_noea typespec_reserved_attr
1160 { $$ = tree_cons (NULL_TREE, $2, $1);
1161 TREE_STATIC ($$) = 1; }
1162 | declspecs_sc_ts_nosa_ea typespec_reserved_attr
1163 { $$ = tree_cons (NULL_TREE, $2, $1);
1164 TREE_STATIC ($$) = 1; }
1165 | declspecs_sc_nots_nosa_noea typespec_attr
1166 { $$ = tree_cons (NULL_TREE, $2, $1);
1167 TREE_STATIC ($$) = 1; }
1168 | declspecs_sc_nots_nosa_ea typespec_attr
1169 { $$ = tree_cons (NULL_TREE, $2, $1);
1170 TREE_STATIC ($$) = 1; }
1171 ;
1173 declspecs_sc_ts_sa_noea:
1174 declspecs_sc_ts_sa_noea TYPE_QUAL
1175 { $$ = tree_cons (NULL_TREE, $2, $1);
1176 TREE_STATIC ($$) = 1; }
1177 | declspecs_sc_ts_sa_ea TYPE_QUAL
1178 { $$ = tree_cons (NULL_TREE, $2, $1);
1179 TREE_STATIC ($$) = 1; }
1180 | declspecs_sc_ts_sa_noea typespec_reserved_nonattr
1181 { $$ = tree_cons (NULL_TREE, $2, $1);
1182 TREE_STATIC ($$) = 1; }
1183 | declspecs_sc_ts_sa_ea typespec_reserved_nonattr
1184 { $$ = tree_cons (NULL_TREE, $2, $1);
1185 TREE_STATIC ($$) = 1; }
1186 | declspecs_sc_nots_sa_noea typespec_nonattr
1187 { $$ = tree_cons (NULL_TREE, $2, $1);
1188 TREE_STATIC ($$) = 1; }
1189 | declspecs_sc_nots_sa_ea typespec_nonattr
1190 { $$ = tree_cons (NULL_TREE, $2, $1);
1191 TREE_STATIC ($$) = 1; }
1192 | declspecs_nosc_ts_sa_noea scspec
1193 { if (extra_warnings && TREE_STATIC ($1))
1194 warning ("`%s' is not at beginning of declaration",
1195 IDENTIFIER_POINTER ($2));
1196 $$ = tree_cons (NULL_TREE, $2, $1);
1197 TREE_STATIC ($$) = TREE_STATIC ($1); }
1198 | declspecs_nosc_ts_sa_ea scspec
1199 { if (extra_warnings && TREE_STATIC ($1))
1200 warning ("`%s' is not at beginning of declaration",
1201 IDENTIFIER_POINTER ($2));
1202 $$ = tree_cons (NULL_TREE, $2, $1);
1203 TREE_STATIC ($$) = TREE_STATIC ($1); }
1204 | declspecs_sc_ts_sa_noea scspec
1205 { if (extra_warnings && TREE_STATIC ($1))
1206 warning ("`%s' is not at beginning of declaration",
1207 IDENTIFIER_POINTER ($2));
1208 $$ = tree_cons (NULL_TREE, $2, $1);
1209 TREE_STATIC ($$) = TREE_STATIC ($1); }
1210 | declspecs_sc_ts_sa_ea scspec
1211 { if (extra_warnings && TREE_STATIC ($1))
1212 warning ("`%s' is not at beginning of declaration",
1213 IDENTIFIER_POINTER ($2));
1214 $$ = tree_cons (NULL_TREE, $2, $1);
1215 TREE_STATIC ($$) = TREE_STATIC ($1); }
1216 ;
1218 declspecs_sc_ts_sa_ea:
1219 declspecs_sc_ts_sa_noea attributes
1220 { $$ = tree_cons ($2, NULL_TREE, $1);
1221 TREE_STATIC ($$) = TREE_STATIC ($1); }
1222 | declspecs_sc_ts_sa_noea typespec_reserved_attr
1223 { $$ = tree_cons (NULL_TREE, $2, $1);
1224 TREE_STATIC ($$) = 1; }
1225 | declspecs_sc_ts_sa_ea typespec_reserved_attr
1226 { $$ = tree_cons (NULL_TREE, $2, $1);
1227 TREE_STATIC ($$) = 1; }
1228 | declspecs_sc_nots_sa_noea typespec_attr
1229 { $$ = tree_cons (NULL_TREE, $2, $1);
1230 TREE_STATIC ($$) = 1; }
1231 | declspecs_sc_nots_sa_ea typespec_attr
1232 { $$ = tree_cons (NULL_TREE, $2, $1);
1233 TREE_STATIC ($$) = 1; }
1234 ;
1236 /* Particular useful classes of declspecs. */
1237 declspecs_ts:
1238 declspecs_nosc_ts_nosa_noea
1239 | declspecs_nosc_ts_nosa_ea
1240 | declspecs_nosc_ts_sa_noea
1241 | declspecs_nosc_ts_sa_ea
1242 | declspecs_sc_ts_nosa_noea
1243 | declspecs_sc_ts_nosa_ea
1244 | declspecs_sc_ts_sa_noea
1245 | declspecs_sc_ts_sa_ea
1246 ;
1248 declspecs_nots:
1249 declspecs_nosc_nots_nosa_noea
1250 | declspecs_nosc_nots_nosa_ea
1251 | declspecs_nosc_nots_sa_noea
1252 | declspecs_nosc_nots_sa_ea
1253 | declspecs_sc_nots_nosa_noea
1254 | declspecs_sc_nots_nosa_ea
1255 | declspecs_sc_nots_sa_noea
1256 | declspecs_sc_nots_sa_ea
1257 ;
1259 declspecs_ts_nosa:
1260 declspecs_nosc_ts_nosa_noea
1261 | declspecs_nosc_ts_nosa_ea
1262 | declspecs_sc_ts_nosa_noea
1263 | declspecs_sc_ts_nosa_ea
1264 ;
1266 declspecs_nots_nosa:
1267 declspecs_nosc_nots_nosa_noea
1268 | declspecs_nosc_nots_nosa_ea
1269 | declspecs_sc_nots_nosa_noea
1270 | declspecs_sc_nots_nosa_ea
1271 ;
1273 declspecs_nosc_ts:
1274 declspecs_nosc_ts_nosa_noea
1275 | declspecs_nosc_ts_nosa_ea
1276 | declspecs_nosc_ts_sa_noea
1277 | declspecs_nosc_ts_sa_ea
1278 ;
1280 declspecs_nosc_nots:
1281 declspecs_nosc_nots_nosa_noea
1282 | declspecs_nosc_nots_nosa_ea
1283 | declspecs_nosc_nots_sa_noea
1284 | declspecs_nosc_nots_sa_ea
1285 ;
1287 declspecs_nosc:
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 | declspecs_nosc_nots_nosa_noea
1293 | declspecs_nosc_nots_nosa_ea
1294 | declspecs_nosc_nots_sa_noea
1295 | declspecs_nosc_nots_sa_ea
1296 ;
1298 declspecs:
1299 declspecs_nosc_nots_nosa_noea
1300 | declspecs_nosc_nots_nosa_ea
1301 | declspecs_nosc_nots_sa_noea
1302 | declspecs_nosc_nots_sa_ea
1303 | declspecs_nosc_ts_nosa_noea
1304 | declspecs_nosc_ts_nosa_ea
1305 | declspecs_nosc_ts_sa_noea
1306 | declspecs_nosc_ts_sa_ea
1307 | declspecs_sc_nots_nosa_noea
1308 | declspecs_sc_nots_nosa_ea
1309 | declspecs_sc_nots_sa_noea
1310 | declspecs_sc_nots_sa_ea
1311 | declspecs_sc_ts_nosa_noea
1312 | declspecs_sc_ts_nosa_ea
1313 | declspecs_sc_ts_sa_noea
1314 | declspecs_sc_ts_sa_ea
1315 ;
1317 /* A (possibly empty) sequence of type qualifiers and attributes. */
1318 maybe_type_quals_attrs:
1319 /* empty */
1320 { $$ = NULL_TREE; }
1321 | declspecs_nosc_nots
1322 { $$ = $1; }
1323 ;
1325 /* A type specifier (but not a type qualifier).
1326 Once we have seen one of these in a declaration,
1327 if a typedef name appears then it is being redeclared.
1329 The _reserved versions start with a reserved word and may appear anywhere
1330 in the declaration specifiers; the _nonreserved versions may only
1331 appear before any other type specifiers, and after that are (if names)
1332 being redeclared.
1334 FIXME: should the _nonreserved version be restricted to names being
1335 redeclared only? The other entries there relate only the GNU extensions
1336 and Objective C, and are historically parsed thus, and don't make sense
1337 after other type specifiers, but it might be cleaner to count them as
1338 _reserved.
1340 _attr means: specifiers that either end with attributes,
1341 or are such that any following attributes would
1342 be parsed as part of the specifier.
1344 _nonattr: specifiers. */
1346 typespec_nonattr:
1347 typespec_reserved_nonattr
1348 | typespec_nonreserved_nonattr
1349 ;
1351 typespec_attr:
1352 typespec_reserved_attr
1353 ;
1355 typespec_reserved_nonattr:
1356 TYPESPEC
1357 { OBJC_NEED_RAW_IDENTIFIER (1); }
1358 | structsp_nonattr
1359 ;
1361 typespec_reserved_attr:
1362 structsp_attr
1363 ;
1365 typespec_nonreserved_nonattr:
1366 TYPENAME
1367 { /* For a typedef name, record the meaning, not the name.
1368 In case of `foo foo, bar;'. */
1369 $$ = lookup_name ($1); }
1370 ifobjc
1371 | CLASSNAME protocolrefs
1372 { $$ = get_static_reference ($1, $2); }
1373 | OBJECTNAME protocolrefs
1374 { $$ = get_object_reference ($2); }
1376 /* Make "<SomeProtocol>" equivalent to "id <SomeProtocol>"
1377 - nisse@lysator.liu.se */
1378 | non_empty_protocolrefs
1379 { $$ = get_object_reference ($1); }
1380 end ifobjc
1381 | TYPEOF '(' expr ')'
1382 { $$ = TREE_TYPE ($3); }
1383 | TYPEOF '(' typename ')'
1384 { $$ = groktypename ($3); }
1385 ;
1387 /* typespec_nonreserved_attr does not exist. */
1389 initdecls:
1390 initdcl
1391 | initdecls ',' maybe_resetattrs initdcl
1392 ;
1394 notype_initdecls:
1395 notype_initdcl
1396 | notype_initdecls ',' maybe_resetattrs notype_initdcl
1397 ;
1399 maybeasm:
1400 /* empty */
1401 { $$ = NULL_TREE; }
1402 | ASM_KEYWORD '(' string ')'
1403 { if (TREE_CHAIN ($3)) $3 = combine_strings ($3);
1404 $$ = $3;
1405 }
1406 ;
1408 initdcl:
1409 declarator maybeasm maybe_attribute '='
1410 { $<ttype>$ = start_decl ($1, current_declspecs, 1,
1411 chainon ($3, all_prefix_attributes));
1412 start_init ($<ttype>$, $2, global_bindings_p ()); }
1413 init
1414 /* Note how the declaration of the variable is in effect while its init is parsed! */
1415 { finish_init ();
1416 finish_decl ($<ttype>5, $6, $2); }
1417 | declarator maybeasm maybe_attribute
1418 { tree d = start_decl ($1, current_declspecs, 0,
1419 chainon ($3, all_prefix_attributes));
1420 finish_decl (d, NULL_TREE, $2);
1421 }
1422 ;
1424 notype_initdcl:
1425 notype_declarator maybeasm maybe_attribute '='
1426 { $<ttype>$ = start_decl ($1, current_declspecs, 1,
1427 chainon ($3, all_prefix_attributes));
1428 start_init ($<ttype>$, $2, global_bindings_p ()); }
1429 init
1430 /* Note how the declaration of the variable is in effect while its init is parsed! */
1431 { finish_init ();
1432 finish_decl ($<ttype>5, $6, $2); }
1433 | notype_declarator maybeasm maybe_attribute
1434 { tree d = start_decl ($1, current_declspecs, 0,
1435 chainon ($3, all_prefix_attributes));
1436 finish_decl (d, NULL_TREE, $2); }
1437 ;
1438 /* the * rules are dummies to accept the Apollo extended syntax
1439 so that the header files compile. */
1440 maybe_attribute:
1441 /* empty */
1442 { $$ = NULL_TREE; }
1443 | attributes
1444 { $$ = $1; }
1445 ;
1447 attributes:
1448 attribute
1449 { $$ = $1; }
1450 | attributes attribute
1451 { $$ = chainon ($1, $2); }
1452 ;
1454 attribute:
1455 ATTRIBUTE '(' '(' attribute_list ')' ')'
1456 { $$ = $4; }
1457 ;
1459 attribute_list:
1460 attrib
1461 { $$ = $1; }
1462 | attribute_list ',' attrib
1463 { $$ = chainon ($1, $3); }
1464 ;
1466 attrib:
1467 /* empty */
1468 { $$ = NULL_TREE; }
1469 | any_word
1470 { $$ = build_tree_list ($1, NULL_TREE); }
1471 | any_word '(' IDENTIFIER ')'
1472 { $$ = build_tree_list ($1, build_tree_list (NULL_TREE, $3)); }
1473 | any_word '(' IDENTIFIER ',' nonnull_exprlist ')'
1474 { $$ = build_tree_list ($1, tree_cons (NULL_TREE, $3, $5)); }
1475 | any_word '(' exprlist ')'
1476 { $$ = build_tree_list ($1, $3); }
1477 ;
1479 /* This still leaves out most reserved keywords,
1480 shouldn't we include them? */
1482 any_word:
1483 identifier
1484 | scspec
1485 | TYPESPEC
1486 | TYPE_QUAL
1487 ;
1489 scspec:
1490 STATIC
1491 | SCSPEC
1492 ;
1493 \f
1494 /* Initializers. `init' is the entry point. */
1496 init:
1497 expr_no_commas
1498 | '{'
1499 { really_start_incremental_init (NULL_TREE); }
1500 initlist_maybe_comma '}'
1501 { $$ = pop_init_level (0); }
1502 | error
1503 { $$ = error_mark_node; }
1504 ;
1506 /* `initlist_maybe_comma' is the guts of an initializer in braces. */
1507 initlist_maybe_comma:
1508 /* empty */
1509 { if (pedantic)
1510 pedwarn ("ISO C forbids empty initializer braces"); }
1511 | initlist1 maybecomma
1512 ;
1514 initlist1:
1515 initelt
1516 | initlist1 ',' initelt
1517 ;
1519 /* `initelt' is a single element of an initializer.
1520 It may use braces. */
1521 initelt:
1522 designator_list '=' initval
1523 { if (pedantic && ! flag_isoc99)
1524 pedwarn ("ISO C89 forbids specifying subobject to initialize"); }
1525 | designator initval
1526 { if (pedantic)
1527 pedwarn ("obsolete use of designated initializer without `='"); }
1528 | identifier ':'
1529 { set_init_label ($1);
1530 if (pedantic)
1531 pedwarn ("obsolete use of designated initializer with `:'"); }
1532 initval
1533 | initval
1534 ;
1536 initval:
1537 '{'
1538 { push_init_level (0); }
1539 initlist_maybe_comma '}'
1540 { process_init_element (pop_init_level (0)); }
1541 | expr_no_commas
1542 { process_init_element ($1); }
1543 | error
1544 ;
1546 designator_list:
1547 designator
1548 | designator_list designator
1549 ;
1551 designator:
1552 '.' identifier
1553 { set_init_label ($2); }
1554 /* These are for labeled elements. The syntax for an array element
1555 initializer conflicts with the syntax for an Objective-C message,
1556 so don't include these productions in the Objective-C grammar. */
1557 ifc
1558 | '[' expr_no_commas ELLIPSIS expr_no_commas ']'
1559 { set_init_index ($2, $4);
1560 if (pedantic)
1561 pedwarn ("ISO C forbids specifying range of elements to initialize"); }
1562 | '[' expr_no_commas ']'
1563 { set_init_index ($2, NULL_TREE); }
1564 end ifc
1565 ;
1566 \f
1567 nested_function:
1568 declarator
1569 { if (pedantic)
1570 pedwarn ("ISO C forbids nested functions");
1572 push_function_context ();
1573 if (! start_function (current_declspecs, $1,
1574 all_prefix_attributes))
1575 {
1576 pop_function_context ();
1577 YYERROR1;
1578 }
1579 }
1580 old_style_parm_decls
1581 { store_parm_decls (); }
1582 /* This used to use compstmt_or_error.
1583 That caused a bug with input `f(g) int g {}',
1584 where the use of YYERROR1 above caused an error
1585 which then was handled by compstmt_or_error.
1586 There followed a repeated execution of that same rule,
1587 which called YYERROR1 again, and so on. */
1588 save_filename save_lineno compstmt
1589 { tree decl = current_function_decl;
1590 DECL_SOURCE_FILE (decl) = $5;
1591 DECL_SOURCE_LINE (decl) = $6;
1592 finish_function (1);
1593 pop_function_context ();
1594 add_decl_stmt (decl); }
1595 ;
1597 notype_nested_function:
1598 notype_declarator
1599 { if (pedantic)
1600 pedwarn ("ISO C forbids nested functions");
1602 push_function_context ();
1603 if (! start_function (current_declspecs, $1,
1604 all_prefix_attributes))
1605 {
1606 pop_function_context ();
1607 YYERROR1;
1608 }
1609 }
1610 old_style_parm_decls
1611 { store_parm_decls (); }
1612 /* This used to use compstmt_or_error.
1613 That caused a bug with input `f(g) int g {}',
1614 where the use of YYERROR1 above caused an error
1615 which then was handled by compstmt_or_error.
1616 There followed a repeated execution of that same rule,
1617 which called YYERROR1 again, and so on. */
1618 save_filename save_lineno compstmt
1619 { tree decl = current_function_decl;
1620 DECL_SOURCE_FILE (decl) = $5;
1621 DECL_SOURCE_LINE (decl) = $6;
1622 finish_function (1);
1623 pop_function_context ();
1624 add_decl_stmt (decl); }
1625 ;
1627 /* Any kind of declarator (thus, all declarators allowed
1628 after an explicit typespec). */
1630 declarator:
1631 after_type_declarator
1632 | notype_declarator
1633 ;
1635 /* A declarator that is allowed only after an explicit typespec. */
1637 after_type_declarator:
1638 '(' maybe_attribute after_type_declarator ')'
1639 { $$ = $2 ? tree_cons ($2, $3, NULL_TREE) : $3; }
1640 | after_type_declarator '(' parmlist_or_identifiers %prec '.'
1641 { $$ = build_nt (CALL_EXPR, $1, $3, NULL_TREE); }
1642 /* | after_type_declarator '(' error ')' %prec '.'
1643 { $$ = build_nt (CALL_EXPR, $1, NULL_TREE, NULL_TREE);
1644 poplevel (0, 0, 0); } */
1645 | after_type_declarator array_declarator %prec '.'
1646 { $$ = set_array_declarator_type ($2, $1, 0); }
1647 | '*' maybe_type_quals_attrs after_type_declarator %prec UNARY
1648 { $$ = make_pointer_declarator ($2, $3); }
1649 | TYPENAME
1650 ifobjc
1651 | OBJECTNAME
1652 end ifobjc
1653 ;
1655 /* Kinds of declarator that can appear in a parameter list
1656 in addition to notype_declarator. This is like after_type_declarator
1657 but does not allow a typedef name in parentheses as an identifier
1658 (because it would conflict with a function with that typedef as arg). */
1659 parm_declarator:
1660 parm_declarator_starttypename
1661 | parm_declarator_nostarttypename
1662 ;
1664 parm_declarator_starttypename:
1665 parm_declarator_starttypename '(' parmlist_or_identifiers %prec '.'
1666 { $$ = build_nt (CALL_EXPR, $1, $3, NULL_TREE); }
1667 /* | parm_declarator_starttypename '(' error ')' %prec '.'
1668 { $$ = build_nt (CALL_EXPR, $1, NULL_TREE, NULL_TREE);
1669 poplevel (0, 0, 0); } */
1670 | parm_declarator_starttypename array_declarator %prec '.'
1671 { $$ = set_array_declarator_type ($2, $1, 0); }
1672 | TYPENAME
1673 ifobjc
1674 | OBJECTNAME
1675 end ifobjc
1676 ;
1678 parm_declarator_nostarttypename:
1679 parm_declarator_nostarttypename '(' parmlist_or_identifiers %prec '.'
1680 { $$ = build_nt (CALL_EXPR, $1, $3, NULL_TREE); }
1681 /* | parm_declarator_nostarttypename '(' error ')' %prec '.'
1682 { $$ = build_nt (CALL_EXPR, $1, NULL_TREE, NULL_TREE);
1683 poplevel (0, 0, 0); } */
1684 | parm_declarator_nostarttypename array_declarator %prec '.'
1685 { $$ = set_array_declarator_type ($2, $1, 0); }
1686 | '*' maybe_type_quals_attrs parm_declarator_starttypename %prec UNARY
1687 { $$ = make_pointer_declarator ($2, $3); }
1688 | '*' maybe_type_quals_attrs parm_declarator_nostarttypename %prec UNARY
1689 { $$ = make_pointer_declarator ($2, $3); }
1690 | '(' maybe_attribute parm_declarator_nostarttypename ')'
1691 { $$ = $2 ? tree_cons ($2, $3, NULL_TREE) : $3; }
1692 ;
1694 /* A declarator allowed whether or not there has been
1695 an explicit typespec. These cannot redeclare a typedef-name. */
1697 notype_declarator:
1698 notype_declarator '(' parmlist_or_identifiers %prec '.'
1699 { $$ = build_nt (CALL_EXPR, $1, $3, NULL_TREE); }
1700 /* | notype_declarator '(' error ')' %prec '.'
1701 { $$ = build_nt (CALL_EXPR, $1, NULL_TREE, NULL_TREE);
1702 poplevel (0, 0, 0); } */
1703 | '(' maybe_attribute notype_declarator ')'
1704 { $$ = $2 ? tree_cons ($2, $3, NULL_TREE) : $3; }
1705 | '*' maybe_type_quals_attrs notype_declarator %prec UNARY
1706 { $$ = make_pointer_declarator ($2, $3); }
1707 | notype_declarator array_declarator %prec '.'
1708 { $$ = set_array_declarator_type ($2, $1, 0); }
1709 | IDENTIFIER
1710 ;
1712 struct_head:
1713 STRUCT
1714 { $$ = NULL_TREE; }
1715 | STRUCT attributes
1716 { $$ = $2; }
1717 ;
1719 union_head:
1720 UNION
1721 { $$ = NULL_TREE; }
1722 | UNION attributes
1723 { $$ = $2; }
1724 ;
1726 enum_head:
1727 ENUM
1728 { $$ = NULL_TREE; }
1729 | ENUM attributes
1730 { $$ = $2; }
1731 ;
1733 /* structsp_attr: struct/union/enum specifiers that either
1734 end with attributes, or are such that any following attributes would
1735 be parsed as part of the struct/union/enum specifier.
1737 structsp_nonattr: other struct/union/enum specifiers. */
1739 structsp_attr:
1740 struct_head identifier '{'
1741 { $$ = start_struct (RECORD_TYPE, $2);
1742 /* Start scope of tag before parsing components. */
1743 }
1744 component_decl_list '}' maybe_attribute
1745 { $$ = finish_struct ($<ttype>4, $5, chainon ($1, $7)); }
1746 | struct_head '{' component_decl_list '}' maybe_attribute
1747 { $$ = finish_struct (start_struct (RECORD_TYPE, NULL_TREE),
1748 $3, chainon ($1, $5));
1749 }
1750 | union_head identifier '{'
1751 { $$ = start_struct (UNION_TYPE, $2); }
1752 component_decl_list '}' maybe_attribute
1753 { $$ = finish_struct ($<ttype>4, $5, chainon ($1, $7)); }
1754 | union_head '{' component_decl_list '}' maybe_attribute
1755 { $$ = finish_struct (start_struct (UNION_TYPE, NULL_TREE),
1756 $3, chainon ($1, $5));
1757 }
1758 | enum_head identifier '{'
1759 { $$ = start_enum ($2); }
1760 enumlist maybecomma_warn '}' maybe_attribute
1761 { $$ = finish_enum ($<ttype>4, nreverse ($5),
1762 chainon ($1, $8)); }
1763 | enum_head '{'
1764 { $$ = start_enum (NULL_TREE); }
1765 enumlist maybecomma_warn '}' maybe_attribute
1766 { $$ = finish_enum ($<ttype>3, nreverse ($4),
1767 chainon ($1, $7)); }
1768 ;
1770 structsp_nonattr:
1771 struct_head identifier
1772 { $$ = xref_tag (RECORD_TYPE, $2); }
1773 | union_head identifier
1774 { $$ = xref_tag (UNION_TYPE, $2); }
1775 | enum_head identifier
1776 { $$ = xref_tag (ENUMERAL_TYPE, $2);
1777 /* In ISO C, enumerated types can be referred to
1778 only if already defined. */
1779 if (pedantic && !COMPLETE_TYPE_P ($$))
1780 pedwarn ("ISO C forbids forward references to `enum' types"); }
1781 ;
1783 maybecomma:
1784 /* empty */
1785 | ','
1786 ;
1788 maybecomma_warn:
1789 /* empty */
1790 | ','
1791 { if (pedantic && ! flag_isoc99)
1792 pedwarn ("comma at end of enumerator list"); }
1793 ;
1795 component_decl_list:
1796 component_decl_list2
1797 { $$ = $1; }
1798 | component_decl_list2 component_decl
1799 { $$ = chainon ($1, $2);
1800 pedwarn ("no semicolon at end of struct or union"); }
1801 ;
1803 component_decl_list2: /* empty */
1804 { $$ = NULL_TREE; }
1805 | component_decl_list2 component_decl ';'
1806 { $$ = chainon ($1, $2); }
1807 | component_decl_list2 ';'
1808 { if (pedantic)
1809 pedwarn ("extra semicolon in struct or union specified"); }
1810 ifobjc
1811 /* foo(sizeof(struct{ @defs(ClassName)})); */
1812 | DEFS '(' CLASSNAME ')'
1813 {
1814 tree interface = lookup_interface ($3);
1816 if (interface)
1817 $$ = get_class_ivars (interface);
1818 else
1819 {
1820 error ("cannot find interface declaration for `%s'",
1821 IDENTIFIER_POINTER ($3));
1822 $$ = NULL_TREE;
1823 }
1824 }
1825 end ifobjc
1826 ;
1828 component_decl:
1829 declspecs_nosc_ts setspecs components
1830 { $$ = $3;
1831 POP_DECLSPEC_STACK; }
1832 | declspecs_nosc_ts setspecs save_filename save_lineno
1833 {
1834 /* Support for unnamed structs or unions as members of
1835 structs or unions (which is [a] useful and [b] supports
1836 MS P-SDK). */
1837 if (pedantic)
1838 pedwarn ("ISO C doesn't support unnamed structs/unions");
1840 $$ = grokfield($3, $4, NULL, current_declspecs, NULL_TREE);
1841 POP_DECLSPEC_STACK; }
1842 | declspecs_nosc_nots setspecs components_notype
1843 { $$ = $3;
1844 POP_DECLSPEC_STACK; }
1845 | declspecs_nosc_nots
1846 { if (pedantic)
1847 pedwarn ("ISO C forbids member declarations with no members");
1848 shadow_tag($1);
1849 $$ = NULL_TREE; }
1850 | error
1851 { $$ = NULL_TREE; }
1852 | extension component_decl
1853 { $$ = $2;
1854 RESTORE_WARN_FLAGS ($1); }
1855 ;
1857 components:
1858 component_declarator
1859 | components ',' maybe_resetattrs component_declarator
1860 { $$ = chainon ($1, $4); }
1861 ;
1863 components_notype:
1864 component_notype_declarator
1865 | components_notype ',' maybe_resetattrs component_notype_declarator
1866 { $$ = chainon ($1, $4); }
1867 ;
1869 component_declarator:
1870 save_filename save_lineno declarator maybe_attribute
1871 { $$ = grokfield ($1, $2, $3, current_declspecs, NULL_TREE);
1872 decl_attributes (&$$, chainon ($4, all_prefix_attributes), 0); }
1873 | save_filename save_lineno
1874 declarator ':' expr_no_commas maybe_attribute
1875 { $$ = grokfield ($1, $2, $3, current_declspecs, $5);
1876 decl_attributes (&$$, chainon ($6, all_prefix_attributes), 0); }
1877 | save_filename save_lineno ':' expr_no_commas maybe_attribute
1878 { $$ = grokfield ($1, $2, NULL_TREE, current_declspecs, $4);
1879 decl_attributes (&$$, chainon ($5, all_prefix_attributes), 0); }
1880 ;
1882 component_notype_declarator:
1883 save_filename save_lineno notype_declarator maybe_attribute
1884 { $$ = grokfield ($1, $2, $3, current_declspecs, NULL_TREE);
1885 decl_attributes (&$$, chainon ($4, all_prefix_attributes), 0); }
1886 | save_filename save_lineno
1887 notype_declarator ':' expr_no_commas maybe_attribute
1888 { $$ = grokfield ($1, $2, $3, current_declspecs, $5);
1889 decl_attributes (&$$, chainon ($6, all_prefix_attributes), 0); }
1890 | save_filename save_lineno ':' expr_no_commas maybe_attribute
1891 { $$ = grokfield ($1, $2, NULL_TREE, current_declspecs, $4);
1892 decl_attributes (&$$, chainon ($5, all_prefix_attributes), 0); }
1893 ;
1895 /* We chain the enumerators in reverse order.
1896 They are put in forward order where enumlist is used.
1897 (The order used to be significant, but no longer is so.
1898 However, we still maintain the order, just to be clean.) */
1900 enumlist:
1901 enumerator
1902 | enumlist ',' enumerator
1903 { if ($1 == error_mark_node)
1904 $$ = $1;
1905 else
1906 $$ = chainon ($3, $1); }
1907 | error
1908 { $$ = error_mark_node; }
1909 ;
1912 enumerator:
1913 identifier
1914 { $$ = build_enumerator ($1, NULL_TREE); }
1915 | identifier '=' expr_no_commas
1916 { $$ = build_enumerator ($1, $3); }
1917 ;
1919 typename:
1920 declspecs_nosc
1921 { pending_xref_error ();
1922 $<ttype>$ = $1; }
1923 absdcl
1924 { $$ = build_tree_list ($<ttype>2, $3); }
1925 ;
1927 absdcl: /* an absolute declarator */
1928 /* empty */
1929 { $$ = NULL_TREE; }
1930 | absdcl1
1931 ;
1933 absdcl_maybe_attribute: /* absdcl maybe_attribute, but not just attributes */
1934 /* empty */
1935 { $$ = build_tree_list (build_tree_list (current_declspecs,
1936 NULL_TREE),
1937 all_prefix_attributes); }
1938 | absdcl1
1939 { $$ = build_tree_list (build_tree_list (current_declspecs,
1940 $1),
1941 all_prefix_attributes); }
1942 | absdcl1_noea attributes
1943 { $$ = build_tree_list (build_tree_list (current_declspecs,
1944 $1),
1945 chainon ($2, all_prefix_attributes)); }
1946 ;
1948 absdcl1: /* a nonempty absolute declarator */
1949 absdcl1_ea
1950 | absdcl1_noea
1951 ;
1953 absdcl1_noea:
1954 direct_absdcl1
1955 | '*' maybe_type_quals_attrs absdcl1_noea
1956 { $$ = make_pointer_declarator ($2, $3); }
1957 ;
1959 absdcl1_ea:
1960 '*' maybe_type_quals_attrs
1961 { $$ = make_pointer_declarator ($2, NULL_TREE); }
1962 | '*' maybe_type_quals_attrs absdcl1_ea
1963 { $$ = make_pointer_declarator ($2, $3); }
1964 ;
1966 direct_absdcl1:
1967 '(' maybe_attribute absdcl1 ')'
1968 { $$ = $2 ? tree_cons ($2, $3, NULL_TREE) : $3; }
1969 | direct_absdcl1 '(' parmlist
1970 { $$ = build_nt (CALL_EXPR, $1, $3, NULL_TREE); }
1971 | direct_absdcl1 array_declarator
1972 { $$ = set_array_declarator_type ($2, $1, 1); }
1973 | '(' parmlist
1974 { $$ = build_nt (CALL_EXPR, NULL_TREE, $2, NULL_TREE); }
1975 | array_declarator
1976 { $$ = set_array_declarator_type ($1, NULL_TREE, 1); }
1977 ;
1979 /* The [...] part of a declarator for an array type. */
1981 array_declarator:
1982 '[' maybe_type_quals_attrs expr ']'
1983 { $$ = build_array_declarator ($3, $2, 0, 0); }
1984 | '[' maybe_type_quals_attrs ']'
1985 { $$ = build_array_declarator (NULL_TREE, $2, 0, 0); }
1986 | '[' maybe_type_quals_attrs '*' ']'
1987 { $$ = build_array_declarator (NULL_TREE, $2, 0, 1); }
1988 | '[' STATIC maybe_type_quals_attrs expr ']'
1989 { $$ = build_array_declarator ($4, $3, 1, 0); }
1990 /* declspecs_nosc_nots is a synonym for type_quals_attrs. */
1991 | '[' declspecs_nosc_nots STATIC expr ']'
1992 { $$ = build_array_declarator ($4, $2, 1, 0); }
1993 ;
1995 /* A nonempty series of declarations and statements (possibly followed by
1996 some labels) that can form the body of a compound statement.
1997 NOTE: we don't allow labels on declarations; this might seem like a
1998 natural extension, but there would be a conflict between attributes
1999 on the label and prefix attributes on the declaration. */
2001 stmts_and_decls:
2002 lineno_stmt_decl_or_labels_ending_stmt
2003 | lineno_stmt_decl_or_labels_ending_decl
2004 | lineno_stmt_decl_or_labels_ending_label
2005 {
2006 pedwarn ("deprecated use of label at end of compound statement");
2007 }
2008 | lineno_stmt_decl_or_labels_ending_error
2009 ;
2011 lineno_stmt_decl_or_labels_ending_stmt:
2012 lineno_stmt
2013 | lineno_stmt_decl_or_labels_ending_stmt lineno_stmt
2014 | lineno_stmt_decl_or_labels_ending_decl lineno_stmt
2015 | lineno_stmt_decl_or_labels_ending_label lineno_stmt
2016 | lineno_stmt_decl_or_labels_ending_error lineno_stmt
2017 ;
2019 lineno_stmt_decl_or_labels_ending_decl:
2020 lineno_decl
2021 | lineno_stmt_decl_or_labels_ending_stmt lineno_decl
2022 { if (pedantic && !flag_isoc99)
2023 pedwarn ("ISO C89 forbids mixed declarations and code"); }
2024 | lineno_stmt_decl_or_labels_ending_decl lineno_decl
2025 | lineno_stmt_decl_or_labels_ending_error lineno_decl
2026 ;
2028 lineno_stmt_decl_or_labels_ending_label:
2029 lineno_label
2030 | lineno_stmt_decl_or_labels_ending_stmt lineno_label
2031 | lineno_stmt_decl_or_labels_ending_decl lineno_label
2032 | lineno_stmt_decl_or_labels_ending_label lineno_label
2033 | lineno_stmt_decl_or_labels_ending_error lineno_label
2034 ;
2036 lineno_stmt_decl_or_labels_ending_error:
2037 errstmt
2038 | lineno_stmt_decl_or_labels errstmt
2039 ;
2041 lineno_stmt_decl_or_labels:
2042 lineno_stmt_decl_or_labels_ending_stmt
2043 | lineno_stmt_decl_or_labels_ending_decl
2044 | lineno_stmt_decl_or_labels_ending_label
2045 | lineno_stmt_decl_or_labels_ending_error
2046 ;
2048 errstmt: error ';'
2049 ;
2051 pushlevel: /* empty */
2052 { pushlevel (0);
2053 clear_last_expr ();
2054 add_scope_stmt (/*begin_p=*/1, /*partial_p=*/0);
2055 ifobjc
2056 if (objc_method_context)
2057 add_objc_decls ();
2058 end ifobjc
2059 }
2060 ;
2062 poplevel: /* empty */
2063 { $$ = add_scope_stmt (/*begin_p=*/0, /*partial_p=*/0); }
2065 /* Start and end blocks created for the new scopes of C99. */
2066 c99_block_start: /* empty */
2067 { if (flag_isoc99)
2068 {
2069 $$ = c_begin_compound_stmt ();
2070 pushlevel (0);
2071 clear_last_expr ();
2072 add_scope_stmt (/*begin_p=*/1, /*partial_p=*/0);
2073 ifobjc
2074 if (objc_method_context)
2075 add_objc_decls ();
2076 end ifobjc
2077 }
2078 else
2079 $$ = NULL_TREE;
2080 }
2081 ;
2083 /* Productions using c99_block_start and c99_block_end will need to do what's
2084 in compstmt: RECHAIN_STMTS ($1, COMPOUND_BODY ($1)); $$ = $2; where
2085 $1 is the value of c99_block_start and $2 of c99_block_end. */
2086 c99_block_end: /* empty */
2087 { if (flag_isoc99)
2088 {
2089 tree scope_stmt = add_scope_stmt (/*begin_p=*/0, /*partial_p=*/0);
2090 $$ = poplevel (kept_level_p (), 0, 0);
2091 SCOPE_STMT_BLOCK (TREE_PURPOSE (scope_stmt))
2092 = SCOPE_STMT_BLOCK (TREE_VALUE (scope_stmt))
2093 = $$;
2094 }
2095 else
2096 $$ = NULL_TREE; }
2097 ;
2099 /* Read zero or more forward-declarations for labels
2100 that nested functions can jump to. */
2101 maybe_label_decls:
2102 /* empty */
2103 | label_decls
2104 { if (pedantic)
2105 pedwarn ("ISO C forbids label declarations"); }
2106 ;
2108 label_decls:
2109 label_decl
2110 | label_decls label_decl
2111 ;
2113 label_decl:
2114 LABEL identifiers_or_typenames ';'
2115 { tree link;
2116 for (link = $2; link; link = TREE_CHAIN (link))
2117 {
2118 tree label = shadow_label (TREE_VALUE (link));
2119 C_DECLARED_LABEL_FLAG (label) = 1;
2120 add_decl_stmt (label);
2121 }
2122 }
2123 ;
2125 /* This is the body of a function definition.
2126 It causes syntax errors to ignore to the next openbrace. */
2127 compstmt_or_error:
2128 compstmt
2129 {}
2130 | error compstmt
2131 ;
2133 compstmt_start: '{' { compstmt_count++;
2134 $$ = c_begin_compound_stmt (); }
2136 compstmt_nostart: '}'
2137 { $$ = convert (void_type_node, integer_zero_node); }
2138 | pushlevel maybe_label_decls compstmt_contents_nonempty '}' poplevel
2139 { $$ = poplevel (kept_level_p (), 1, 0);
2140 SCOPE_STMT_BLOCK (TREE_PURPOSE ($5))
2141 = SCOPE_STMT_BLOCK (TREE_VALUE ($5))
2142 = $$; }
2143 ;
2145 compstmt_contents_nonempty:
2146 stmts_and_decls
2147 | error
2148 ;
2150 compstmt_primary_start:
2151 '(' '{'
2152 { if (current_function_decl == 0)
2153 {
2154 error ("braced-group within expression allowed only inside a function");
2155 YYERROR;
2156 }
2157 /* We must force a BLOCK for this level
2158 so that, if it is not expanded later,
2159 there is a way to turn off the entire subtree of blocks
2160 that are contained in it. */
2161 keep_next_level ();
2162 push_label_level ();
2163 compstmt_count++;
2164 $$ = add_stmt (build_stmt (COMPOUND_STMT, last_tree));
2165 }
2167 compstmt: compstmt_start compstmt_nostart
2168 { RECHAIN_STMTS ($1, COMPOUND_BODY ($1));
2169 last_expr_type = NULL_TREE;
2170 $$ = $1; }
2171 ;
2173 /* Value is number of statements counted as of the closeparen. */
2174 simple_if:
2175 if_prefix c99_block_lineno_labeled_stmt
2176 { c_finish_then (); }
2177 /* Make sure c_expand_end_cond is run once
2178 for each call to c_expand_start_cond.
2179 Otherwise a crash is likely. */
2180 | if_prefix error
2181 ;
2183 if_prefix:
2184 /* We must build the IF_STMT node before parsing its
2185 condition so that STMT_LINENO refers to the line
2186 containing the "if", and not the line containing
2187 the close-parenthesis.
2189 c_begin_if_stmt returns the IF_STMT node, which
2190 we later pass to c_expand_start_cond to fill
2191 in the condition and other tidbits. */
2192 IF
2193 { $<ttype>$ = c_begin_if_stmt (); }
2194 '(' expr ')'
2195 { c_expand_start_cond (truthvalue_conversion ($4),
2196 compstmt_count,$<ttype>2);
2197 $<itype>$ = stmt_count;
2198 if_stmt_file = $<filename>-2;
2199 if_stmt_line = $<lineno>-1; }
2200 ;
2202 /* This is a subroutine of stmt.
2203 It is used twice, once for valid DO statements
2204 and once for catching errors in parsing the end test. */
2205 do_stmt_start:
2206 DO
2207 { stmt_count++;
2208 compstmt_count++;
2209 $<ttype>$
2210 = add_stmt (build_stmt (DO_STMT, NULL_TREE,
2211 NULL_TREE));
2212 /* In the event that a parse error prevents
2213 parsing the complete do-statement, set the
2214 condition now. Otherwise, we can get crashes at
2215 RTL-generation time. */
2216 DO_COND ($<ttype>$) = error_mark_node; }
2217 c99_block_lineno_labeled_stmt WHILE
2218 { $$ = $<ttype>2;
2219 RECHAIN_STMTS ($$, DO_BODY ($$)); }
2220 ;
2222 /* The forced readahead in here is because we might be at the end of a
2223 line, and the line and file won't be bumped until yylex absorbs the
2224 first token on the next line. */
2225 save_filename:
2226 { if (yychar == YYEMPTY)
2227 yychar = YYLEX;
2228 $$ = input_filename; }
2229 ;
2231 save_lineno:
2232 { if (yychar == YYEMPTY)
2233 yychar = YYLEX;
2234 $$ = lineno; }
2235 ;
2237 lineno_labeled_stmt:
2238 lineno_stmt
2239 | lineno_label lineno_labeled_stmt
2240 ;
2242 /* Like lineno_labeled_stmt, but a block in C99. */
2243 c99_block_lineno_labeled_stmt:
2244 c99_block_start lineno_labeled_stmt c99_block_end
2245 { if (flag_isoc99)
2246 RECHAIN_STMTS ($1, COMPOUND_BODY ($1)); }
2247 ;
2249 lineno_stmt:
2250 save_filename save_lineno stmt
2251 { if ($3)
2252 {
2253 STMT_LINENO ($3) = $2;
2254 /* ??? We currently have no way of recording
2255 the filename for a statement. This probably
2256 matters little in practice at the moment,
2257 but I suspect that problems will occur when
2258 doing inlining at the tree level. */
2259 }
2260 }
2261 ;
2263 lineno_label:
2264 save_filename save_lineno label
2265 { if ($3)
2266 {
2267 STMT_LINENO ($3) = $2;
2268 }
2269 }
2270 ;
2272 select_or_iter_stmt:
2273 simple_if ELSE
2274 { c_expand_start_else ();
2275 $<itype>1 = stmt_count; }
2276 c99_block_lineno_labeled_stmt
2277 { c_finish_else ();
2278 c_expand_end_cond ();
2279 if (extra_warnings && stmt_count == $<itype>1)
2280 warning ("empty body in an else-statement"); }
2281 | simple_if %prec IF
2282 { c_expand_end_cond ();
2283 /* This warning is here instead of in simple_if, because we
2284 do not want a warning if an empty if is followed by an
2285 else statement. Increment stmt_count so we don't
2286 give a second error if this is a nested `if'. */
2287 if (extra_warnings && stmt_count++ == $<itype>1)
2288 warning_with_file_and_line (if_stmt_file, if_stmt_line,
2289 "empty body in an if-statement"); }
2290 /* Make sure c_expand_end_cond is run once
2291 for each call to c_expand_start_cond.
2292 Otherwise a crash is likely. */
2293 | simple_if ELSE error
2294 { c_expand_end_cond (); }
2295 /* We must build the WHILE_STMT node before parsing its
2296 condition so that STMT_LINENO refers to the line
2297 containing the "while", and not the line containing
2298 the close-parenthesis.
2300 c_begin_while_stmt returns the WHILE_STMT node, which
2301 we later pass to c_finish_while_stmt_cond to fill
2302 in the condition and other tidbits. */
2303 | WHILE
2304 { stmt_count++;
2305 $<ttype>$ = c_begin_while_stmt (); }
2306 '(' expr ')'
2307 { $4 = truthvalue_conversion ($4);
2308 c_finish_while_stmt_cond (truthvalue_conversion ($4),
2309 $<ttype>2);
2310 $<ttype>$ = add_stmt ($<ttype>2); }
2311 c99_block_lineno_labeled_stmt
2312 { RECHAIN_STMTS ($<ttype>6, WHILE_BODY ($<ttype>6)); }
2313 | do_stmt_start
2314 '(' expr ')' ';'
2315 { DO_COND ($1) = truthvalue_conversion ($3); }
2316 | do_stmt_start error
2317 { }
2318 | FOR
2319 { $<ttype>$ = build_stmt (FOR_STMT, NULL_TREE, NULL_TREE,
2320 NULL_TREE, NULL_TREE);
2321 add_stmt ($<ttype>$); }
2322 '(' for_init_stmt
2323 { stmt_count++;
2324 RECHAIN_STMTS ($<ttype>2, FOR_INIT_STMT ($<ttype>2)); }
2325 xexpr ';'
2326 { if ($6)
2327 FOR_COND ($<ttype>2) = truthvalue_conversion ($6); }
2328 xexpr ')'
2329 { FOR_EXPR ($<ttype>2) = $9; }
2330 c99_block_lineno_labeled_stmt
2331 { RECHAIN_STMTS ($<ttype>2, FOR_BODY ($<ttype>2)); }
2332 | SWITCH '(' expr ')'
2333 { stmt_count++;
2334 $<ttype>$ = c_start_case ($3); }
2335 c99_block_lineno_labeled_stmt
2336 { c_finish_case (); }
2337 ;
2339 for_init_stmt:
2340 xexpr ';'
2341 { add_stmt (build_stmt (EXPR_STMT, $1)); }
2342 | decl
2343 { check_for_loop_decls (); }
2344 ;
2346 /* Parse a single real statement, not including any labels. */
2347 stmt:
2348 compstmt
2349 { stmt_count++; $$ = $1; }
2350 | expr ';'
2351 { stmt_count++;
2352 $$ = c_expand_expr_stmt ($1); }
2353 | c99_block_start select_or_iter_stmt c99_block_end
2354 { if (flag_isoc99)
2355 RECHAIN_STMTS ($1, COMPOUND_BODY ($1));
2356 $$ = NULL_TREE; }
2357 | BREAK ';'
2358 { stmt_count++;
2359 $$ = add_stmt (build_break_stmt ()); }
2360 | CONTINUE ';'
2361 { stmt_count++;
2362 $$ = add_stmt (build_continue_stmt ()); }
2363 | RETURN ';'
2364 { stmt_count++;
2365 $$ = c_expand_return (NULL_TREE); }
2366 | RETURN expr ';'
2367 { stmt_count++;
2368 $$ = c_expand_return ($2); }
2369 | ASM_KEYWORD maybe_type_qual '(' expr ')' ';'
2370 { stmt_count++;
2371 $$ = simple_asm_stmt ($4); }
2372 /* This is the case with just output operands. */
2373 | ASM_KEYWORD maybe_type_qual '(' expr ':' asm_operands ')' ';'
2374 { stmt_count++;
2375 $$ = build_asm_stmt ($2, $4, $6, NULL_TREE, NULL_TREE); }
2376 /* This is the case with input operands as well. */
2377 | ASM_KEYWORD maybe_type_qual '(' expr ':' asm_operands ':'
2378 asm_operands ')' ';'
2379 { stmt_count++;
2380 $$ = build_asm_stmt ($2, $4, $6, $8, NULL_TREE); }
2381 /* This is the case with clobbered registers as well. */
2382 | ASM_KEYWORD maybe_type_qual '(' expr ':' asm_operands ':'
2383 asm_operands ':' asm_clobbers ')' ';'
2384 { stmt_count++;
2385 $$ = build_asm_stmt ($2, $4, $6, $8, $10); }
2386 | GOTO identifier ';'
2387 { tree decl;
2388 stmt_count++;
2389 decl = lookup_label ($2);
2390 if (decl != 0)
2391 {
2392 TREE_USED (decl) = 1;
2393 $$ = add_stmt (build_stmt (GOTO_STMT, decl));
2394 }
2395 else
2396 $$ = NULL_TREE;
2397 }
2398 | GOTO '*' expr ';'
2399 { if (pedantic)
2400 pedwarn ("ISO C forbids `goto *expr;'");
2401 stmt_count++;
2402 $3 = convert (ptr_type_node, $3);
2403 $$ = add_stmt (build_stmt (GOTO_STMT, $3)); }
2404 | ';'
2405 { $$ = NULL_TREE; }
2406 ;
2408 /* Any kind of label, including jump labels and case labels.
2409 ANSI C accepts labels only before statements, but we allow them
2410 also at the end of a compound statement. */
2412 label: CASE expr_no_commas ':'
2413 { stmt_count++;
2414 $$ = do_case ($2, NULL_TREE); }
2415 | CASE expr_no_commas ELLIPSIS expr_no_commas ':'
2416 { stmt_count++;
2417 $$ = do_case ($2, $4); }
2418 | DEFAULT ':'
2419 { stmt_count++;
2420 $$ = do_case (NULL_TREE, NULL_TREE); }
2421 | identifier save_filename save_lineno ':' maybe_attribute
2422 { tree label = define_label ($2, $3, $1);
2423 stmt_count++;
2424 if (label)
2425 {
2426 decl_attributes (&label, $5, 0);
2427 $$ = add_stmt (build_stmt (LABEL_STMT, label));
2428 }
2429 else
2430 $$ = NULL_TREE;
2431 }
2432 ;
2434 /* Either a type-qualifier or nothing. First thing in an `asm' statement. */
2436 maybe_type_qual:
2437 /* empty */
2438 { emit_line_note (input_filename, lineno);
2439 $$ = NULL_TREE; }
2440 | TYPE_QUAL
2441 { emit_line_note (input_filename, lineno); }
2442 ;
2444 xexpr:
2445 /* empty */
2446 { $$ = NULL_TREE; }
2447 | expr
2448 ;
2450 /* These are the operands other than the first string and colon
2451 in asm ("addextend %2,%1": "=dm" (x), "0" (y), "g" (*x)) */
2452 asm_operands: /* empty */
2453 { $$ = NULL_TREE; }
2454 | nonnull_asm_operands
2455 ;
2457 nonnull_asm_operands:
2458 asm_operand
2459 | nonnull_asm_operands ',' asm_operand
2460 { $$ = chainon ($1, $3); }
2461 ;
2463 asm_operand:
2464 STRING '(' expr ')'
2465 { $$ = build_tree_list (build_tree_list (NULL_TREE, $1), $3); }
2466 | '[' identifier ']' STRING '(' expr ')'
2467 { $$ = build_tree_list (build_tree_list ($2, $4), $6); }
2468 ;
2470 asm_clobbers:
2471 string
2472 { $$ = tree_cons (NULL_TREE, combine_strings ($1), NULL_TREE); }
2473 | asm_clobbers ',' string
2474 { $$ = tree_cons (NULL_TREE, combine_strings ($3), $1); }
2475 ;
2476 \f
2477 /* This is what appears inside the parens in a function declarator.
2478 Its value is a list of ..._TYPE nodes. Attributes must appear here
2479 to avoid a conflict with their appearance after an open parenthesis
2480 in an abstract declarator, as in
2481 "void bar (int (__attribute__((__mode__(SI))) int foo));". */
2482 parmlist:
2483 maybe_attribute
2484 { pushlevel (0);
2485 clear_parm_order ();
2486 declare_parm_level (0); }
2487 parmlist_1
2488 { $$ = $3;
2489 parmlist_tags_warning ();
2490 poplevel (0, 0, 0); }
2491 ;
2493 parmlist_1:
2494 parmlist_2 ')'
2495 | parms ';'
2496 { tree parm;
2497 if (pedantic)
2498 pedwarn ("ISO C forbids forward parameter declarations");
2499 /* Mark the forward decls as such. */
2500 for (parm = getdecls (); parm; parm = TREE_CHAIN (parm))
2501 TREE_ASM_WRITTEN (parm) = 1;
2502 clear_parm_order (); }
2503 maybe_attribute
2504 { /* Dummy action so attributes are in known place
2505 on parser stack. */ }
2506 parmlist_1
2507 { $$ = $6; }
2508 | error ')'
2509 { $$ = tree_cons (NULL_TREE, NULL_TREE, NULL_TREE); }
2510 ;
2512 /* This is what appears inside the parens in a function declarator.
2513 Is value is represented in the format that grokdeclarator expects. */
2514 parmlist_2: /* empty */
2515 { $$ = get_parm_info (0); }
2516 | ELLIPSIS
2517 { $$ = get_parm_info (0);
2518 /* Gcc used to allow this as an extension. However, it does
2519 not work for all targets, and thus has been disabled.
2520 Also, since func (...) and func () are indistinguishable,
2521 it caused problems with the code in expand_builtin which
2522 tries to verify that BUILT_IN_NEXT_ARG is being used
2523 correctly. */
2524 error ("ISO C requires a named argument before `...'");
2525 }
2526 | parms
2527 { $$ = get_parm_info (1); }
2528 | parms ',' ELLIPSIS
2529 { $$ = get_parm_info (0); }
2530 ;
2532 parms:
2533 firstparm
2534 { push_parm_decl ($1); }
2535 | parms ',' parm
2536 { push_parm_decl ($3); }
2537 ;
2539 /* A single parameter declaration or parameter type name,
2540 as found in a parmlist. */
2541 parm:
2542 declspecs_ts setspecs parm_declarator maybe_attribute
2543 { $$ = build_tree_list (build_tree_list (current_declspecs,
2544 $3),
2545 chainon ($4, all_prefix_attributes));
2546 POP_DECLSPEC_STACK; }
2547 | declspecs_ts setspecs notype_declarator maybe_attribute
2548 { $$ = build_tree_list (build_tree_list (current_declspecs,
2549 $3),
2550 chainon ($4, all_prefix_attributes));
2551 POP_DECLSPEC_STACK; }
2552 | declspecs_ts setspecs absdcl_maybe_attribute
2553 { $$ = $3;
2554 POP_DECLSPEC_STACK; }
2555 | declspecs_nots setspecs notype_declarator maybe_attribute
2556 { $$ = build_tree_list (build_tree_list (current_declspecs,
2557 $3),
2558 chainon ($4, all_prefix_attributes));
2559 POP_DECLSPEC_STACK; }
2561 | declspecs_nots setspecs absdcl_maybe_attribute
2562 { $$ = $3;
2563 POP_DECLSPEC_STACK; }
2564 ;
2566 /* The first parm, which must suck attributes from off the top of the parser
2567 stack. */
2568 firstparm:
2569 declspecs_ts_nosa setspecs_fp parm_declarator maybe_attribute
2570 { $$ = build_tree_list (build_tree_list (current_declspecs,
2571 $3),
2572 chainon ($4, all_prefix_attributes));
2573 POP_DECLSPEC_STACK; }
2574 | declspecs_ts_nosa setspecs_fp notype_declarator maybe_attribute
2575 { $$ = build_tree_list (build_tree_list (current_declspecs,
2576 $3),
2577 chainon ($4, all_prefix_attributes));
2578 POP_DECLSPEC_STACK; }
2579 | declspecs_ts_nosa setspecs_fp absdcl_maybe_attribute
2580 { $$ = $3;
2581 POP_DECLSPEC_STACK; }
2582 | declspecs_nots_nosa setspecs_fp notype_declarator maybe_attribute
2583 { $$ = build_tree_list (build_tree_list (current_declspecs,
2584 $3),
2585 chainon ($4, all_prefix_attributes));
2586 POP_DECLSPEC_STACK; }
2588 | declspecs_nots_nosa setspecs_fp absdcl_maybe_attribute
2589 { $$ = $3;
2590 POP_DECLSPEC_STACK; }
2591 ;
2593 setspecs_fp:
2594 setspecs
2595 { prefix_attributes = chainon (prefix_attributes, $<ttype>-2);
2596 all_prefix_attributes = prefix_attributes; }
2597 ;
2599 /* This is used in a function definition
2600 where either a parmlist or an identifier list is ok.
2601 Its value is a list of ..._TYPE nodes or a list of identifiers. */
2602 parmlist_or_identifiers:
2603 maybe_attribute
2604 { pushlevel (0);
2605 clear_parm_order ();
2606 declare_parm_level (1); }
2607 parmlist_or_identifiers_1
2608 { $$ = $3;
2609 parmlist_tags_warning ();
2610 poplevel (0, 0, 0); }
2611 ;
2613 parmlist_or_identifiers_1:
2614 parmlist_1
2615 | identifiers ')'
2616 { tree t;
2617 for (t = $1; t; t = TREE_CHAIN (t))
2618 if (TREE_VALUE (t) == NULL_TREE)
2619 error ("`...' in old-style identifier list");
2620 $$ = tree_cons (NULL_TREE, NULL_TREE, $1);
2622 /* Make sure we have a parmlist after attributes. */
2623 if ($<ttype>-1 != 0
2624 && (TREE_CODE ($$) != TREE_LIST
2625 || TREE_PURPOSE ($$) == 0
2626 || TREE_CODE (TREE_PURPOSE ($$)) != PARM_DECL))
2627 YYERROR1;
2628 }
2629 ;
2631 /* A nonempty list of identifiers. */
2632 identifiers:
2633 IDENTIFIER
2634 { $$ = build_tree_list (NULL_TREE, $1); }
2635 | identifiers ',' IDENTIFIER
2636 { $$ = chainon ($1, build_tree_list (NULL_TREE, $3)); }
2637 ;
2639 /* A nonempty list of identifiers, including typenames. */
2640 identifiers_or_typenames:
2641 identifier
2642 { $$ = build_tree_list (NULL_TREE, $1); }
2643 | identifiers_or_typenames ',' identifier
2644 { $$ = chainon ($1, build_tree_list (NULL_TREE, $3)); }
2645 ;
2647 extension:
2648 EXTENSION
2649 { $$ = SAVE_WARN_FLAGS();
2650 pedantic = 0;
2651 warn_pointer_arith = 0;
2652 warn_traditional = 0; }
2653 ;
2654 \f
2655 ifobjc
2656 /* Objective-C productions. */
2658 objcdef:
2659 classdef
2660 | classdecl
2661 | aliasdecl
2662 | protocoldef
2663 | methoddef
2664 | END
2665 {
2666 if (objc_implementation_context)
2667 {
2668 finish_class (objc_implementation_context);
2669 objc_ivar_chain = NULL_TREE;
2670 objc_implementation_context = NULL_TREE;
2671 }
2672 else
2673 warning ("`@end' must appear in an implementation context");
2674 }
2675 ;
2677 /* A nonempty list of identifiers. */
2678 identifier_list:
2679 identifier
2680 { $$ = build_tree_list (NULL_TREE, $1); }
2681 | identifier_list ',' identifier
2682 { $$ = chainon ($1, build_tree_list (NULL_TREE, $3)); }
2683 ;
2685 classdecl:
2686 CLASS identifier_list ';'
2687 {
2688 objc_declare_class ($2);
2689 }
2691 aliasdecl:
2692 ALIAS identifier identifier ';'
2693 {
2694 objc_declare_alias ($2, $3);
2695 }
2697 classdef:
2698 INTERFACE identifier protocolrefs '{'
2699 {
2700 objc_interface_context = objc_ivar_context
2701 = start_class (CLASS_INTERFACE_TYPE, $2, NULL_TREE, $3);
2702 objc_public_flag = 0;
2703 }
2704 ivar_decl_list '}'
2705 {
2706 continue_class (objc_interface_context);
2707 }
2708 methodprotolist
2709 END
2710 {
2711 finish_class (objc_interface_context);
2712 objc_interface_context = NULL_TREE;
2713 }
2715 | INTERFACE identifier protocolrefs
2716 {
2717 objc_interface_context
2718 = start_class (CLASS_INTERFACE_TYPE, $2, NULL_TREE, $3);
2719 continue_class (objc_interface_context);
2720 }
2721 methodprotolist
2722 END
2723 {
2724 finish_class (objc_interface_context);
2725 objc_interface_context = NULL_TREE;
2726 }
2728 | INTERFACE identifier ':' identifier protocolrefs '{'
2729 {
2730 objc_interface_context = objc_ivar_context
2731 = start_class (CLASS_INTERFACE_TYPE, $2, $4, $5);
2732 objc_public_flag = 0;
2733 }
2734 ivar_decl_list '}'
2735 {
2736 continue_class (objc_interface_context);
2737 }
2738 methodprotolist
2739 END
2740 {
2741 finish_class (objc_interface_context);
2742 objc_interface_context = NULL_TREE;
2743 }
2745 | INTERFACE identifier ':' identifier protocolrefs
2746 {
2747 objc_interface_context
2748 = start_class (CLASS_INTERFACE_TYPE, $2, $4, $5);
2749 continue_class (objc_interface_context);
2750 }
2751 methodprotolist
2752 END
2753 {
2754 finish_class (objc_interface_context);
2755 objc_interface_context = NULL_TREE;
2756 }
2758 | IMPLEMENTATION identifier '{'
2759 {
2760 objc_implementation_context = objc_ivar_context
2761 = start_class (CLASS_IMPLEMENTATION_TYPE, $2, NULL_TREE, NULL_TREE);
2762 objc_public_flag = 0;
2763 }
2764 ivar_decl_list '}'
2765 {
2766 objc_ivar_chain
2767 = continue_class (objc_implementation_context);
2768 }
2770 | IMPLEMENTATION identifier
2771 {
2772 objc_implementation_context
2773 = start_class (CLASS_IMPLEMENTATION_TYPE, $2, NULL_TREE, NULL_TREE);
2774 objc_ivar_chain
2775 = continue_class (objc_implementation_context);
2776 }
2778 | IMPLEMENTATION identifier ':' identifier '{'
2779 {
2780 objc_implementation_context = objc_ivar_context
2781 = start_class (CLASS_IMPLEMENTATION_TYPE, $2, $4, NULL_TREE);
2782 objc_public_flag = 0;
2783 }
2784 ivar_decl_list '}'
2785 {
2786 objc_ivar_chain
2787 = continue_class (objc_implementation_context);
2788 }
2790 | IMPLEMENTATION identifier ':' identifier
2791 {
2792 objc_implementation_context
2793 = start_class (CLASS_IMPLEMENTATION_TYPE, $2, $4, NULL_TREE);
2794 objc_ivar_chain
2795 = continue_class (objc_implementation_context);
2796 }
2798 | INTERFACE identifier '(' identifier ')' protocolrefs
2799 {
2800 objc_interface_context
2801 = start_class (CATEGORY_INTERFACE_TYPE, $2, $4, $6);
2802 continue_class (objc_interface_context);
2803 }
2804 methodprotolist
2805 END
2806 {
2807 finish_class (objc_interface_context);
2808 objc_interface_context = NULL_TREE;
2809 }
2811 | IMPLEMENTATION identifier '(' identifier ')'
2812 {
2813 objc_implementation_context
2814 = start_class (CATEGORY_IMPLEMENTATION_TYPE, $2, $4, NULL_TREE);
2815 objc_ivar_chain
2816 = continue_class (objc_implementation_context);
2817 }
2818 ;
2820 protocoldef:
2821 PROTOCOL identifier protocolrefs
2822 {
2823 objc_pq_context = 1;
2824 objc_interface_context
2825 = start_protocol(PROTOCOL_INTERFACE_TYPE, $2, $3);
2826 }
2827 methodprotolist END
2828 {
2829 objc_pq_context = 0;
2830 finish_protocol(objc_interface_context);
2831 objc_interface_context = NULL_TREE;
2832 }
2833 /* The @protocol forward-declaration production introduces a
2834 reduce/reduce conflict on ';', which should be resolved in
2835 favor of the production 'identifier_list -> identifier'. */
2836 | PROTOCOL identifier_list ';'
2837 {
2838 objc_declare_protocols ($2);
2839 }
2840 ;
2842 protocolrefs:
2843 /* empty */
2844 {
2845 $$ = NULL_TREE;
2846 }
2847 | non_empty_protocolrefs
2848 ;
2850 non_empty_protocolrefs:
2851 ARITHCOMPARE identifier_list ARITHCOMPARE
2852 {
2853 if ($1 == LT_EXPR && $3 == GT_EXPR)
2854 $$ = $2;
2855 else
2856 YYERROR1;
2857 }
2858 ;
2860 ivar_decl_list:
2861 ivar_decl_list visibility_spec ivar_decls
2862 | ivar_decls
2863 ;
2865 visibility_spec:
2866 PRIVATE { objc_public_flag = 2; }
2867 | PROTECTED { objc_public_flag = 0; }
2868 | PUBLIC { objc_public_flag = 1; }
2869 ;
2871 ivar_decls:
2872 /* empty */
2873 {
2874 $$ = NULL_TREE;
2875 }
2876 | ivar_decls ivar_decl ';'
2877 | ivar_decls ';'
2878 {
2879 if (pedantic)
2880 pedwarn ("extra semicolon in struct or union specified");
2881 }
2882 ;
2885 /* There is a shift-reduce conflict here, because `components' may
2886 start with a `typename'. It happens that shifting (the default resolution)
2887 does the right thing, because it treats the `typename' as part of
2888 a `typed_typespecs'.
2890 It is possible that this same technique would allow the distinction
2891 between `notype_initdecls' and `initdecls' to be eliminated.
2892 But I am being cautious and not trying it. */
2894 ivar_decl:
2895 declspecs_nosc_ts setspecs ivars
2896 { $$ = $3;
2897 POP_DECLSPEC_STACK; }
2898 | declspecs_nosc_nots setspecs ivars
2899 { $$ = $3;
2900 POP_DECLSPEC_STACK; }
2901 | error
2902 { $$ = NULL_TREE; }
2903 ;
2905 ivars:
2906 /* empty */
2907 { $$ = NULL_TREE; }
2908 | ivar_declarator
2909 | ivars ',' maybe_resetattrs ivar_declarator
2910 ;
2912 ivar_declarator:
2913 declarator
2914 {
2915 $$ = add_instance_variable (objc_ivar_context,
2916 objc_public_flag,
2917 $1, current_declspecs,
2918 NULL_TREE);
2919 }
2920 | declarator ':' expr_no_commas
2921 {
2922 $$ = add_instance_variable (objc_ivar_context,
2923 objc_public_flag,
2924 $1, current_declspecs, $3);
2925 }
2926 | ':' expr_no_commas
2927 {
2928 $$ = add_instance_variable (objc_ivar_context,
2929 objc_public_flag,
2930 NULL_TREE,
2931 current_declspecs, $2);
2932 }
2933 ;
2935 methodtype:
2936 '+'
2937 { objc_inherit_code = CLASS_METHOD_DECL; }
2938 | '-'
2939 { objc_inherit_code = INSTANCE_METHOD_DECL; }
2940 ;
2942 methoddef:
2943 methodtype
2944 {
2945 objc_pq_context = 1;
2946 if (!objc_implementation_context)
2947 fatal_error ("method definition not in class context");
2948 }
2949 methoddecl
2950 {
2951 objc_pq_context = 0;
2952 if (objc_inherit_code == CLASS_METHOD_DECL)
2953 add_class_method (objc_implementation_context, $3);
2954 else
2955 add_instance_method (objc_implementation_context, $3);
2956 start_method_def ($3);
2957 }
2958 optarglist
2959 {
2960 continue_method_def ();
2961 }
2962 compstmt_or_error
2963 {
2964 finish_method_def ();
2965 }
2966 ;
2968 /* the reason for the strange actions in this rule
2969 is so that notype_initdecls when reached via datadef
2970 can find a valid list of type and sc specs in $0. */
2972 methodprotolist:
2973 /* empty */
2974 | {$<ttype>$ = NULL_TREE; } methodprotolist2
2975 ;
2977 methodprotolist2: /* eliminates a shift/reduce conflict */
2978 methodproto
2979 | datadef
2980 | methodprotolist2 methodproto
2981 | methodprotolist2 {$<ttype>$ = NULL_TREE; } datadef
2982 ;
2984 semi_or_error:
2985 ';'
2986 | error
2987 ;
2989 methodproto:
2990 methodtype
2991 {
2992 /* Remember protocol qualifiers in prototypes. */
2993 objc_pq_context = 1;
2994 }
2995 methoddecl
2996 {
2997 /* Forget protocol qualifiers here. */
2998 objc_pq_context = 0;
2999 if (objc_inherit_code == CLASS_METHOD_DECL)
3000 add_class_method (objc_interface_context, $3);
3001 else
3002 add_instance_method (objc_interface_context, $3);
3003 }
3004 semi_or_error
3005 ;
3007 methoddecl:
3008 '(' typename ')' unaryselector
3009 {
3010 $$ = build_method_decl (objc_inherit_code, $2, $4, NULL_TREE);
3011 }
3013 | unaryselector
3014 {
3015 $$ = build_method_decl (objc_inherit_code, NULL_TREE, $1, NULL_TREE);
3016 }
3018 | '(' typename ')' keywordselector optparmlist
3019 {
3020 $$ = build_method_decl (objc_inherit_code, $2, $4, $5);
3021 }
3023 | keywordselector optparmlist
3024 {
3025 $$ = build_method_decl (objc_inherit_code, NULL_TREE, $1, $2);
3026 }
3027 ;
3029 /* "optarglist" assumes that start_method_def has already been called...
3030 if it is not, the "xdecls" will not be placed in the proper scope */
3032 optarglist:
3033 /* empty */
3034 | ';' myxdecls
3035 ;
3037 /* to get around the following situation: "int foo (int a) int b; {}" that
3038 is synthesized when parsing "- a:a b:b; id c; id d; { ... }" */
3040 myxdecls:
3041 /* empty */
3042 | mydecls
3043 ;
3045 mydecls:
3046 mydecl
3047 | errstmt
3048 | mydecls mydecl
3049 | mydecl errstmt
3050 ;
3052 mydecl:
3053 declspecs_ts setspecs myparms ';'
3054 { POP_DECLSPEC_STACK; }
3055 | declspecs_ts ';'
3056 { shadow_tag ($1); }
3057 | declspecs_nots ';'
3058 { pedwarn ("empty declaration"); }
3059 ;
3061 myparms:
3062 myparm
3063 { push_parm_decl ($1); }
3064 | myparms ',' myparm
3065 { push_parm_decl ($3); }
3066 ;
3068 /* A single parameter declaration or parameter type name,
3069 as found in a parmlist. DOES NOT ALLOW AN INITIALIZER OR ASMSPEC */
3071 myparm:
3072 parm_declarator maybe_attribute
3073 { $$ = build_tree_list (build_tree_list (current_declspecs,
3074 $1),
3075 chainon ($2, all_prefix_attributes)); }
3076 | notype_declarator maybe_attribute
3077 { $$ = build_tree_list (build_tree_list (current_declspecs,
3078 $1),
3079 chainon ($2, all_prefix_attributes)); }
3080 | absdcl_maybe_attribute
3081 { $$ = $1; }
3082 ;
3084 optparmlist:
3085 /* empty */
3086 {
3087 $$ = NULL_TREE;
3088 }
3089 | ',' ELLIPSIS
3090 {
3091 /* oh what a kludge! */
3092 $$ = objc_ellipsis_node;
3093 }
3094 | ','
3095 {
3096 pushlevel (0);
3097 }
3098 parmlist_2
3099 {
3100 /* returns a tree list node generated by get_parm_info */
3101 $$ = $3;
3102 poplevel (0, 0, 0);
3103 }
3104 ;
3106 unaryselector:
3107 selector
3108 ;
3110 keywordselector:
3111 keyworddecl
3113 | keywordselector keyworddecl
3114 {
3115 $$ = chainon ($1, $2);
3116 }
3117 ;
3119 selector:
3120 IDENTIFIER
3121 | TYPENAME
3122 | CLASSNAME
3123 | OBJECTNAME
3124 | reservedwords
3125 ;
3127 reservedwords:
3128 ENUM | STRUCT | UNION | IF | ELSE | WHILE | DO | FOR
3129 | SWITCH | CASE | DEFAULT | BREAK | CONTINUE | RETURN
3130 | GOTO | ASM_KEYWORD | SIZEOF | TYPEOF | ALIGNOF
3131 | TYPESPEC | TYPE_QUAL
3132 ;
3134 keyworddecl:
3135 selector ':' '(' typename ')' identifier
3136 {
3137 $$ = build_keyword_decl ($1, $4, $6);
3138 }
3140 | selector ':' identifier
3141 {
3142 $$ = build_keyword_decl ($1, NULL_TREE, $3);
3143 }
3145 | ':' '(' typename ')' identifier
3146 {
3147 $$ = build_keyword_decl (NULL_TREE, $3, $5);
3148 }
3150 | ':' identifier
3151 {
3152 $$ = build_keyword_decl (NULL_TREE, NULL_TREE, $2);
3153 }
3154 ;
3156 messageargs:
3157 selector
3158 | keywordarglist
3159 ;
3161 keywordarglist:
3162 keywordarg
3163 | keywordarglist keywordarg
3164 {
3165 $$ = chainon ($1, $2);
3166 }
3167 ;
3170 keywordexpr:
3171 nonnull_exprlist
3172 {
3173 if (TREE_CHAIN ($1) == NULL_TREE)
3174 /* just return the expr., remove a level of indirection */
3175 $$ = TREE_VALUE ($1);
3176 else
3177 /* we have a comma expr., we will collapse later */
3178 $$ = $1;
3179 }
3180 ;
3182 keywordarg:
3183 selector ':' keywordexpr
3184 {
3185 $$ = build_tree_list ($1, $3);
3186 }
3187 | ':' keywordexpr
3188 {
3189 $$ = build_tree_list (NULL_TREE, $2);
3190 }
3191 ;
3193 receiver:
3194 expr
3195 | CLASSNAME
3196 {
3197 $$ = get_class_reference ($1);
3198 }
3199 ;
3201 objcmessageexpr:
3202 '['
3203 { objc_receiver_context = 1; }
3204 receiver
3205 { objc_receiver_context = 0; }
3206 messageargs ']'
3207 {
3208 $$ = build_tree_list ($3, $5);
3209 }
3210 ;
3212 selectorarg:
3213 selector
3214 | keywordnamelist
3215 ;
3217 keywordnamelist:
3218 keywordname
3219 | keywordnamelist keywordname
3220 {
3221 $$ = chainon ($1, $2);
3222 }
3223 ;
3225 keywordname:
3226 selector ':'
3227 {
3228 $$ = build_tree_list ($1, NULL_TREE);
3229 }
3230 | ':'
3231 {
3232 $$ = build_tree_list (NULL_TREE, NULL_TREE);
3233 }
3234 ;
3236 objcselectorexpr:
3237 SELECTOR '(' selectorarg ')'
3238 {
3239 $$ = $3;
3240 }
3241 ;
3243 objcprotocolexpr:
3244 PROTOCOL '(' identifier ')'
3245 {
3246 $$ = $3;
3247 }
3248 ;
3250 /* extension to support C-structures in the archiver */
3252 objcencodeexpr:
3253 ENCODE '(' typename ')'
3254 {
3255 $$ = groktypename ($3);
3256 }
3257 ;
3259 end ifobjc
3260 %%
3262 /* yylex() is a thin wrapper around c_lex(), all it does is translate
3263 cpplib.h's token codes into yacc's token codes. */
3265 static enum cpp_ttype last_token;
3267 /* The reserved keyword table. */
3268 struct resword
3269 {
3270 const char *word;
3271 ENUM_BITFIELD(rid) rid : 16;
3272 unsigned int disable : 16;
3273 };
3275 /* Disable mask. Keywords are disabled if (reswords[i].disable & mask) is
3276 _true_. */
3277 #define D_C89 0x01 /* not in C89 */
3278 #define D_EXT 0x02 /* GCC extension */
3279 #define D_EXT89 0x04 /* GCC extension incorporated in C99 */
3280 #define D_OBJC 0x08 /* Objective C only */
3282 static const struct resword reswords[] =
3283 {
3284 { "_Bool", RID_BOOL, 0 },
3285 { "_Complex", RID_COMPLEX, 0 },
3286 { "__FUNCTION__", RID_FUNCTION_NAME, 0 },
3287 { "__PRETTY_FUNCTION__", RID_PRETTY_FUNCTION_NAME, 0 },
3288 { "__alignof", RID_ALIGNOF, 0 },
3289 { "__alignof__", RID_ALIGNOF, 0 },
3290 { "__asm", RID_ASM, 0 },
3291 { "__asm__", RID_ASM, 0 },
3292 { "__attribute", RID_ATTRIBUTE, 0 },
3293 { "__attribute__", RID_ATTRIBUTE, 0 },
3294 { "__bounded", RID_BOUNDED, 0 },
3295 { "__bounded__", RID_BOUNDED, 0 },
3296 { "__builtin_choose_expr", RID_CHOOSE_EXPR, 0 },
3297 { "__builtin_types_compatible_p", RID_TYPES_COMPATIBLE_P, 0 },
3298 { "__builtin_va_arg", RID_VA_ARG, 0 },
3299 { "__complex", RID_COMPLEX, 0 },
3300 { "__complex__", RID_COMPLEX, 0 },
3301 { "__const", RID_CONST, 0 },
3302 { "__const__", RID_CONST, 0 },
3303 { "__extension__", RID_EXTENSION, 0 },
3304 { "__func__", RID_C99_FUNCTION_NAME, 0 },
3305 { "__imag", RID_IMAGPART, 0 },
3306 { "__imag__", RID_IMAGPART, 0 },
3307 { "__inline", RID_INLINE, 0 },
3308 { "__inline__", RID_INLINE, 0 },
3309 { "__label__", RID_LABEL, 0 },
3310 { "__ptrbase", RID_PTRBASE, 0 },
3311 { "__ptrbase__", RID_PTRBASE, 0 },
3312 { "__ptrextent", RID_PTREXTENT, 0 },
3313 { "__ptrextent__", RID_PTREXTENT, 0 },
3314 { "__ptrvalue", RID_PTRVALUE, 0 },
3315 { "__ptrvalue__", RID_PTRVALUE, 0 },
3316 { "__real", RID_REALPART, 0 },
3317 { "__real__", RID_REALPART, 0 },
3318 { "__restrict", RID_RESTRICT, 0 },
3319 { "__restrict__", RID_RESTRICT, 0 },
3320 { "__signed", RID_SIGNED, 0 },
3321 { "__signed__", RID_SIGNED, 0 },
3322 { "__typeof", RID_TYPEOF, 0 },
3323 { "__typeof__", RID_TYPEOF, 0 },
3324 { "__unbounded", RID_UNBOUNDED, 0 },
3325 { "__unbounded__", RID_UNBOUNDED, 0 },
3326 { "__volatile", RID_VOLATILE, 0 },
3327 { "__volatile__", RID_VOLATILE, 0 },
3328 { "asm", RID_ASM, D_EXT },
3329 { "auto", RID_AUTO, 0 },
3330 { "break", RID_BREAK, 0 },
3331 { "case", RID_CASE, 0 },
3332 { "char", RID_CHAR, 0 },
3333 { "const", RID_CONST, 0 },
3334 { "continue", RID_CONTINUE, 0 },
3335 { "default", RID_DEFAULT, 0 },
3336 { "do", RID_DO, 0 },
3337 { "double", RID_DOUBLE, 0 },
3338 { "else", RID_ELSE, 0 },
3339 { "enum", RID_ENUM, 0 },
3340 { "extern", RID_EXTERN, 0 },
3341 { "float", RID_FLOAT, 0 },
3342 { "for", RID_FOR, 0 },
3343 { "goto", RID_GOTO, 0 },
3344 { "if", RID_IF, 0 },
3345 { "inline", RID_INLINE, D_EXT89 },
3346 { "int", RID_INT, 0 },
3347 { "long", RID_LONG, 0 },
3348 { "register", RID_REGISTER, 0 },
3349 { "restrict", RID_RESTRICT, D_C89 },
3350 { "return", RID_RETURN, 0 },
3351 { "short", RID_SHORT, 0 },
3352 { "signed", RID_SIGNED, 0 },
3353 { "sizeof", RID_SIZEOF, 0 },
3354 { "static", RID_STATIC, 0 },
3355 { "struct", RID_STRUCT, 0 },
3356 { "switch", RID_SWITCH, 0 },
3357 { "typedef", RID_TYPEDEF, 0 },
3358 { "typeof", RID_TYPEOF, D_EXT },
3359 { "union", RID_UNION, 0 },
3360 { "unsigned", RID_UNSIGNED, 0 },
3361 { "void", RID_VOID, 0 },
3362 { "volatile", RID_VOLATILE, 0 },
3363 { "while", RID_WHILE, 0 },
3364 ifobjc
3365 { "id", RID_ID, D_OBJC },
3367 /* These objc keywords are recognized only immediately after
3368 an '@'. */
3369 { "class", RID_AT_CLASS, D_OBJC },
3370 { "compatibility_alias", RID_AT_ALIAS, D_OBJC },
3371 { "defs", RID_AT_DEFS, D_OBJC },
3372 { "encode", RID_AT_ENCODE, D_OBJC },
3373 { "end", RID_AT_END, D_OBJC },
3374 { "implementation", RID_AT_IMPLEMENTATION, D_OBJC },
3375 { "interface", RID_AT_INTERFACE, D_OBJC },
3376 { "private", RID_AT_PRIVATE, D_OBJC },
3377 { "protected", RID_AT_PROTECTED, D_OBJC },
3378 { "protocol", RID_AT_PROTOCOL, D_OBJC },
3379 { "public", RID_AT_PUBLIC, D_OBJC },
3380 { "selector", RID_AT_SELECTOR, D_OBJC },
3382 /* These are recognized only in protocol-qualifier context
3383 (see above) */
3384 { "bycopy", RID_BYCOPY, D_OBJC },
3385 { "byref", RID_BYREF, D_OBJC },
3386 { "in", RID_IN, D_OBJC },
3387 { "inout", RID_INOUT, D_OBJC },
3388 { "oneway", RID_ONEWAY, D_OBJC },
3389 { "out", RID_OUT, D_OBJC },
3390 end ifobjc
3391 };
3392 #define N_reswords (sizeof reswords / sizeof (struct resword))
3394 /* Table mapping from RID_* constants to yacc token numbers.
3395 Unfortunately we have to have entries for all the keywords in all
3396 three languages. */
3397 static const short rid_to_yy[RID_MAX] =
3398 {
3399 /* RID_STATIC */ STATIC,
3400 /* RID_UNSIGNED */ TYPESPEC,
3401 /* RID_LONG */ TYPESPEC,
3402 /* RID_CONST */ TYPE_QUAL,
3403 /* RID_EXTERN */ SCSPEC,
3404 /* RID_REGISTER */ SCSPEC,
3405 /* RID_TYPEDEF */ SCSPEC,
3406 /* RID_SHORT */ TYPESPEC,
3407 /* RID_INLINE */ SCSPEC,
3408 /* RID_VOLATILE */ TYPE_QUAL,
3409 /* RID_SIGNED */ TYPESPEC,
3410 /* RID_AUTO */ SCSPEC,
3411 /* RID_RESTRICT */ TYPE_QUAL,
3413 /* C extensions */
3414 /* RID_BOUNDED */ TYPE_QUAL,
3415 /* RID_UNBOUNDED */ TYPE_QUAL,
3416 /* RID_COMPLEX */ TYPESPEC,
3418 /* C++ */
3419 /* RID_FRIEND */ 0,
3420 /* RID_VIRTUAL */ 0,
3421 /* RID_EXPLICIT */ 0,
3422 /* RID_EXPORT */ 0,
3423 /* RID_MUTABLE */ 0,
3425 /* ObjC */
3426 /* RID_IN */ TYPE_QUAL,
3427 /* RID_OUT */ TYPE_QUAL,
3428 /* RID_INOUT */ TYPE_QUAL,
3429 /* RID_BYCOPY */ TYPE_QUAL,
3430 /* RID_BYREF */ TYPE_QUAL,
3431 /* RID_ONEWAY */ TYPE_QUAL,
3433 /* C */
3434 /* RID_INT */ TYPESPEC,
3435 /* RID_CHAR */ TYPESPEC,
3436 /* RID_FLOAT */ TYPESPEC,
3437 /* RID_DOUBLE */ TYPESPEC,
3438 /* RID_VOID */ TYPESPEC,
3439 /* RID_ENUM */ ENUM,
3440 /* RID_STRUCT */ STRUCT,
3441 /* RID_UNION */ UNION,
3442 /* RID_IF */ IF,
3443 /* RID_ELSE */ ELSE,
3444 /* RID_WHILE */ WHILE,
3445 /* RID_DO */ DO,
3446 /* RID_FOR */ FOR,
3447 /* RID_SWITCH */ SWITCH,
3448 /* RID_CASE */ CASE,
3449 /* RID_DEFAULT */ DEFAULT,
3450 /* RID_BREAK */ BREAK,
3451 /* RID_CONTINUE */ CONTINUE,
3452 /* RID_RETURN */ RETURN,
3453 /* RID_GOTO */ GOTO,
3454 /* RID_SIZEOF */ SIZEOF,
3456 /* C extensions */
3457 /* RID_ASM */ ASM_KEYWORD,
3458 /* RID_TYPEOF */ TYPEOF,
3459 /* RID_ALIGNOF */ ALIGNOF,
3460 /* RID_ATTRIBUTE */ ATTRIBUTE,
3461 /* RID_VA_ARG */ VA_ARG,
3462 /* RID_EXTENSION */ EXTENSION,
3463 /* RID_IMAGPART */ IMAGPART,
3464 /* RID_REALPART */ REALPART,
3465 /* RID_LABEL */ LABEL,
3466 /* RID_PTRBASE */ PTR_BASE,
3467 /* RID_PTREXTENT */ PTR_EXTENT,
3468 /* RID_PTRVALUE */ PTR_VALUE,
3470 /* RID_CHOOSE_EXPR */ CHOOSE_EXPR,
3471 /* RID_TYPES_COMPATIBLE_P */ TYPES_COMPATIBLE_P,
3473 /* RID_FUNCTION_NAME */ STRING_FUNC_NAME,
3474 /* RID_PRETTY_FUNCTION_NAME */ STRING_FUNC_NAME,
3475 /* RID_C99_FUNCTION_NAME */ VAR_FUNC_NAME,
3477 /* C++ */
3478 /* RID_BOOL */ TYPESPEC,
3479 /* RID_WCHAR */ 0,
3480 /* RID_CLASS */ 0,
3481 /* RID_PUBLIC */ 0,
3482 /* RID_PRIVATE */ 0,
3483 /* RID_PROTECTED */ 0,
3484 /* RID_TEMPLATE */ 0,
3485 /* RID_NULL */ 0,
3486 /* RID_CATCH */ 0,
3487 /* RID_DELETE */ 0,
3488 /* RID_FALSE */ 0,
3489 /* RID_NAMESPACE */ 0,
3490 /* RID_NEW */ 0,
3491 /* RID_OPERATOR */ 0,
3492 /* RID_THIS */ 0,
3493 /* RID_THROW */ 0,
3494 /* RID_TRUE */ 0,
3495 /* RID_TRY */ 0,
3496 /* RID_TYPENAME */ 0,
3497 /* RID_TYPEID */ 0,
3498 /* RID_USING */ 0,
3500 /* casts */
3501 /* RID_CONSTCAST */ 0,
3502 /* RID_DYNCAST */ 0,
3503 /* RID_REINTCAST */ 0,
3504 /* RID_STATCAST */ 0,
3506 /* alternate spellings */
3507 /* RID_AND */ 0,
3508 /* RID_AND_EQ */ 0,
3509 /* RID_NOT */ 0,
3510 /* RID_NOT_EQ */ 0,
3511 /* RID_OR */ 0,
3512 /* RID_OR_EQ */ 0,
3513 /* RID_XOR */ 0,
3514 /* RID_XOR_EQ */ 0,
3515 /* RID_BITAND */ 0,
3516 /* RID_BITOR */ 0,
3517 /* RID_COMPL */ 0,
3519 /* Objective C */
3520 /* RID_ID */ OBJECTNAME,
3521 /* RID_AT_ENCODE */ ENCODE,
3522 /* RID_AT_END */ END,
3523 /* RID_AT_CLASS */ CLASS,
3524 /* RID_AT_ALIAS */ ALIAS,
3525 /* RID_AT_DEFS */ DEFS,
3526 /* RID_AT_PRIVATE */ PRIVATE,
3527 /* RID_AT_PROTECTED */ PROTECTED,
3528 /* RID_AT_PUBLIC */ PUBLIC,
3529 /* RID_AT_PROTOCOL */ PROTOCOL,
3530 /* RID_AT_SELECTOR */ SELECTOR,
3531 /* RID_AT_INTERFACE */ INTERFACE,
3532 /* RID_AT_IMPLEMENTATION */ IMPLEMENTATION
3533 };
3535 static void
3536 init_reswords ()
3537 {
3538 unsigned int i;
3539 tree id;
3540 int mask = (flag_isoc99 ? 0 : D_C89)
3541 | (flag_no_asm ? (flag_isoc99 ? D_EXT : D_EXT|D_EXT89) : 0);
3543 if (c_language != clk_objective_c)
3544 mask |= D_OBJC;
3546 /* It is not necessary to register ridpointers as a GC root, because
3547 all the trees it points to are permanently interned in the
3548 get_identifier hash anyway. */
3549 ridpointers = (tree *) xcalloc ((int) RID_MAX, sizeof (tree));
3550 for (i = 0; i < N_reswords; i++)
3551 {
3552 /* If a keyword is disabled, do not enter it into the table
3553 and so create a canonical spelling that isn't a keyword. */
3554 if (reswords[i].disable & mask)
3555 continue;
3557 id = get_identifier (reswords[i].word);
3558 C_RID_CODE (id) = reswords[i].rid;
3559 C_IS_RESERVED_WORD (id) = 1;
3560 ridpointers [(int) reswords[i].rid] = id;
3561 }
3562 }
3564 #define NAME(type) cpp_type2name (type)
3566 static void
3567 yyerror (msgid)
3568 const char *msgid;
3569 {
3570 const char *string = _(msgid);
3572 if (last_token == CPP_EOF)
3573 error ("%s at end of input", string);
3574 else if (last_token == CPP_CHAR || last_token == CPP_WCHAR)
3575 {
3576 unsigned int val = TREE_INT_CST_LOW (yylval.ttype);
3577 const char *const ell = (last_token == CPP_CHAR) ? "" : "L";
3578 if (val <= UCHAR_MAX && ISGRAPH (val))
3579 error ("%s before %s'%c'", string, ell, val);
3580 else
3581 error ("%s before %s'\\x%x'", string, ell, val);
3582 }
3583 else if (last_token == CPP_STRING
3584 || last_token == CPP_WSTRING)
3585 error ("%s before string constant", string);
3586 else if (last_token == CPP_NUMBER)
3587 error ("%s before numeric constant", string);
3588 else if (last_token == CPP_NAME)
3589 error ("%s before \"%s\"", string, IDENTIFIER_POINTER (yylval.ttype));
3590 else
3591 error ("%s before '%s' token", string, NAME(last_token));
3592 }
3594 static int
3595 yylexname ()
3596 {
3597 tree decl;
3599 ifobjc
3600 int objc_force_identifier = objc_need_raw_identifier;
3601 OBJC_NEED_RAW_IDENTIFIER (0);
3602 end ifobjc
3604 if (C_IS_RESERVED_WORD (yylval.ttype))
3605 {
3606 enum rid rid_code = C_RID_CODE (yylval.ttype);
3608 ifobjc
3609 /* Turn non-typedefed refs to "id" into plain identifiers; this
3610 allows constructs like "void foo(id id);" to work. */
3611 if (rid_code == RID_ID)
3612 {
3613 decl = lookup_name (yylval.ttype);
3614 if (decl == NULL_TREE || TREE_CODE (decl) != TYPE_DECL)
3615 return IDENTIFIER;
3616 }
3618 if (!OBJC_IS_AT_KEYWORD (rid_code)
3619 && (!OBJC_IS_PQ_KEYWORD (rid_code) || objc_pq_context))
3620 end ifobjc
3621 {
3622 int yycode = rid_to_yy[(int) rid_code];
3623 if (yycode == STRING_FUNC_NAME)
3624 {
3625 /* __FUNCTION__ and __PRETTY_FUNCTION__ get converted
3626 to string constants. */
3627 const char *name = fname_string (rid_code);
3629 yylval.ttype = build_string (strlen (name) + 1, name);
3630 C_ARTIFICIAL_STRING_P (yylval.ttype) = 1;
3631 last_token = CPP_STRING; /* so yyerror won't choke */
3632 return STRING;
3633 }
3635 /* Return the canonical spelling for this keyword. */
3636 yylval.ttype = ridpointers[(int) rid_code];
3637 return yycode;
3638 }
3639 }
3641 decl = lookup_name (yylval.ttype);
3642 if (decl)
3643 {
3644 if (TREE_CODE (decl) == TYPE_DECL)
3645 return TYPENAME;
3646 }
3647 ifobjc
3648 else
3649 {
3650 tree objc_interface_decl = is_class_name (yylval.ttype);
3651 /* ObjC class names are in the same namespace as variables and
3652 typedefs, and hence are shadowed by local declarations. */
3653 if (objc_interface_decl
3654 && (global_bindings_p ()
3655 || (!objc_force_identifier && !decl)))
3656 {
3657 yylval.ttype = objc_interface_decl;
3658 return CLASSNAME;
3659 }
3660 }
3661 end ifobjc
3663 return IDENTIFIER;
3664 }
3667 static inline int
3668 _yylex ()
3669 {
3670 get_next:
3671 last_token = c_lex (&yylval.ttype);
3672 switch (last_token)
3673 {
3674 case CPP_EQ: return '=';
3675 case CPP_NOT: return '!';
3676 case CPP_GREATER: yylval.code = GT_EXPR; return ARITHCOMPARE;
3677 case CPP_LESS: yylval.code = LT_EXPR; return ARITHCOMPARE;
3678 case CPP_PLUS: yylval.code = PLUS_EXPR; return '+';
3679 case CPP_MINUS: yylval.code = MINUS_EXPR; return '-';
3680 case CPP_MULT: yylval.code = MULT_EXPR; return '*';
3681 case CPP_DIV: yylval.code = TRUNC_DIV_EXPR; return '/';
3682 case CPP_MOD: yylval.code = TRUNC_MOD_EXPR; return '%';
3683 case CPP_AND: yylval.code = BIT_AND_EXPR; return '&';
3684 case CPP_OR: yylval.code = BIT_IOR_EXPR; return '|';
3685 case CPP_XOR: yylval.code = BIT_XOR_EXPR; return '^';
3686 case CPP_RSHIFT: yylval.code = RSHIFT_EXPR; return RSHIFT;
3687 case CPP_LSHIFT: yylval.code = LSHIFT_EXPR; return LSHIFT;
3689 case CPP_COMPL: return '~';
3690 case CPP_AND_AND: return ANDAND;
3691 case CPP_OR_OR: return OROR;
3692 case CPP_QUERY: return '?';
3693 case CPP_OPEN_PAREN: return '(';
3694 case CPP_EQ_EQ: yylval.code = EQ_EXPR; return EQCOMPARE;
3695 case CPP_NOT_EQ: yylval.code = NE_EXPR; return EQCOMPARE;
3696 case CPP_GREATER_EQ:yylval.code = GE_EXPR; return ARITHCOMPARE;
3697 case CPP_LESS_EQ: yylval.code = LE_EXPR; return ARITHCOMPARE;
3699 case CPP_PLUS_EQ: yylval.code = PLUS_EXPR; return ASSIGN;
3700 case CPP_MINUS_EQ: yylval.code = MINUS_EXPR; return ASSIGN;
3701 case CPP_MULT_EQ: yylval.code = MULT_EXPR; return ASSIGN;
3702 case CPP_DIV_EQ: yylval.code = TRUNC_DIV_EXPR; return ASSIGN;
3703 case CPP_MOD_EQ: yylval.code = TRUNC_MOD_EXPR; return ASSIGN;
3704 case CPP_AND_EQ: yylval.code = BIT_AND_EXPR; return ASSIGN;
3705 case CPP_OR_EQ: yylval.code = BIT_IOR_EXPR; return ASSIGN;
3706 case CPP_XOR_EQ: yylval.code = BIT_XOR_EXPR; return ASSIGN;
3707 case CPP_RSHIFT_EQ: yylval.code = RSHIFT_EXPR; return ASSIGN;
3708 case CPP_LSHIFT_EQ: yylval.code = LSHIFT_EXPR; return ASSIGN;
3710 case CPP_OPEN_SQUARE: return '[';
3711 case CPP_CLOSE_SQUARE: return ']';
3712 case CPP_OPEN_BRACE: return '{';
3713 case CPP_CLOSE_BRACE: return '}';
3714 case CPP_ELLIPSIS: return ELLIPSIS;
3716 case CPP_PLUS_PLUS: return PLUSPLUS;
3717 case CPP_MINUS_MINUS: return MINUSMINUS;
3718 case CPP_DEREF: return POINTSAT;
3719 case CPP_DOT: return '.';
3721 /* The following tokens may affect the interpretation of any
3722 identifiers following, if doing Objective-C. */
3723 case CPP_COLON: OBJC_NEED_RAW_IDENTIFIER (0); return ':';
3724 case CPP_COMMA: OBJC_NEED_RAW_IDENTIFIER (0); return ',';
3725 case CPP_CLOSE_PAREN: OBJC_NEED_RAW_IDENTIFIER (0); return ')';
3726 case CPP_SEMICOLON: OBJC_NEED_RAW_IDENTIFIER (0); return ';';
3728 case CPP_EOF:
3729 return 0;
3731 case CPP_NAME:
3732 return yylexname ();
3734 case CPP_NUMBER:
3735 case CPP_CHAR:
3736 case CPP_WCHAR:
3737 return CONSTANT;
3739 case CPP_STRING:
3740 case CPP_WSTRING:
3741 return STRING;
3743 /* This token is Objective-C specific. It gives the next token
3744 special significance. */
3745 case CPP_ATSIGN:
3746 ifobjc
3747 {
3748 tree after_at;
3749 enum cpp_ttype after_at_type;
3751 after_at_type = c_lex (&after_at);
3753 if (after_at_type == CPP_NAME
3754 && C_IS_RESERVED_WORD (after_at)
3755 && OBJC_IS_AT_KEYWORD (C_RID_CODE (after_at)))
3756 {
3757 yylval.ttype = after_at;
3758 last_token = after_at_type;
3759 return rid_to_yy [(int) C_RID_CODE (after_at)];
3760 }
3761 _cpp_backup_tokens (parse_in, 1);
3762 return '@';
3763 }
3764 end ifobjc
3766 /* These tokens are C++ specific (and will not be generated
3767 in C mode, but let's be cautious). */
3768 case CPP_SCOPE:
3769 case CPP_DEREF_STAR:
3770 case CPP_DOT_STAR:
3771 case CPP_MIN_EQ:
3772 case CPP_MAX_EQ:
3773 case CPP_MIN:
3774 case CPP_MAX:
3775 /* These tokens should not survive translation phase 4. */
3776 case CPP_HASH:
3777 case CPP_PASTE:
3778 error ("syntax error at '%s' token", NAME(last_token));
3779 goto get_next;
3781 default:
3782 abort ();
3783 }
3784 /* NOTREACHED */
3785 }
3787 static int
3788 yylex()
3789 {
3790 int r;
3791 timevar_push (TV_LEX);
3792 r = _yylex();
3793 timevar_pop (TV_LEX);
3794 return r;
3795 }
3797 /* Sets the value of the 'yydebug' variable to VALUE.
3798 This is a function so we don't have to have YYDEBUG defined
3799 in order to build the compiler. */
3801 void
3802 c_set_yydebug (value)
3803 int value;
3804 {
3805 #if YYDEBUG != 0
3806 yydebug = value;
3807 #else
3808 warning ("YYDEBUG not defined");
3809 #endif
3810 }
3812 /* Function used when yydebug is set, to print a token in more detail. */
3814 static void
3815 yyprint (file, yychar, yyl)
3816 FILE *file;
3817 int yychar;
3818 YYSTYPE yyl;
3819 {
3820 tree t = yyl.ttype;
3822 fprintf (file, " [%s]", NAME(last_token));
3824 switch (yychar)
3825 {
3826 case IDENTIFIER:
3827 case TYPENAME:
3828 case OBJECTNAME:
3829 case TYPESPEC:
3830 case TYPE_QUAL:
3831 case SCSPEC:
3832 case STATIC:
3833 if (IDENTIFIER_POINTER (t))
3834 fprintf (file, " `%s'", IDENTIFIER_POINTER (t));
3835 break;
3837 case CONSTANT:
3838 fprintf (file, " %s", GET_MODE_NAME (TYPE_MODE (TREE_TYPE (t))));
3839 if (TREE_CODE (t) == INTEGER_CST)
3840 fprintf (file,
3841 #if HOST_BITS_PER_WIDE_INT == 64
3842 #if HOST_BITS_PER_WIDE_INT == HOST_BITS_PER_INT
3843 " 0x%x%016x",
3844 #else
3845 #if HOST_BITS_PER_WIDE_INT == HOST_BITS_PER_LONG
3846 " 0x%lx%016lx",
3847 #else
3848 " 0x%llx%016llx",
3849 #endif
3850 #endif
3851 #else
3852 #if HOST_BITS_PER_WIDE_INT != HOST_BITS_PER_INT
3853 " 0x%lx%08lx",
3854 #else
3855 " 0x%x%08x",
3856 #endif
3857 #endif
3858 TREE_INT_CST_HIGH (t), TREE_INT_CST_LOW (t));
3859 break;
3860 }
3861 }
3862 \f
3863 /* This is not the ideal place to put these, but we have to get them out
3864 of c-lex.c because cp/lex.c has its own versions. */
3866 /* Return something to represent absolute declarators containing a *.
3867 TARGET is the absolute declarator that the * contains.
3868 TYPE_QUALS_ATTRS is a list of modifiers such as const or volatile
3869 to apply to the pointer type, represented as identifiers, possible mixed
3870 with attributes.
3872 We return an INDIRECT_REF whose "contents" are TARGET (inside a TREE_LIST,
3873 if attributes are present) and whose type is the modifier list. */
3875 tree
3876 make_pointer_declarator (type_quals_attrs, target)
3877 tree type_quals_attrs, target;
3878 {
3879 tree quals, attrs;
3880 tree itarget = target;
3881 split_specs_attrs (type_quals_attrs, &quals, &attrs);
3882 if (attrs != NULL_TREE)
3883 itarget = tree_cons (attrs, target, NULL_TREE);
3884 return build1 (INDIRECT_REF, quals, itarget);
3885 }