| blob | 176041bf0c86876515bb83f0f6aa3f7c2f489aaa |
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
90 /* Reserved words that specify type.
91 yylval contains an IDENTIFIER_NODE which indicates which one. */
92 %token TYPESPEC
94 /* Reserved words that qualify type: "const", "volatile", or "restrict".
95 yylval contains an IDENTIFIER_NODE which indicates which one. */
96 %token TYPE_QUAL
98 /* Character or numeric constants.
99 yylval is the node for the constant. */
100 %token CONSTANT
102 /* String constants in raw form.
103 yylval is a STRING_CST node. */
104 %token STRING
106 /* "...", used for functions with variable arglists. */
107 %token ELLIPSIS
109 /* the reserved words */
110 /* SCO include files test "ASM", so use something else. */
111 %token SIZEOF ENUM STRUCT UNION IF ELSE WHILE DO FOR SWITCH CASE DEFAULT
112 %token BREAK CONTINUE RETURN GOTO ASM_KEYWORD TYPEOF ALIGNOF
113 %token ATTRIBUTE EXTENSION LABEL
114 %token REALPART IMAGPART VA_ARG CHOOSE_EXPR TYPES_COMPATIBLE_P
115 %token PTR_VALUE PTR_BASE PTR_EXTENT
117 /* function name can be a string const or a var decl. */
118 %token STRING_FUNC_NAME VAR_FUNC_NAME
120 /* Add precedence rules to solve dangling else s/r conflict */
121 %nonassoc IF
122 %nonassoc ELSE
124 /* Define the operator tokens and their precedences.
125 The value is an integer because, if used, it is the tree code
126 to use in the expression made from the operator. */
128 %right <code> ASSIGN '='
129 %right <code> '?' ':'
130 %left <code> OROR
131 %left <code> ANDAND
132 %left <code> '|'
133 %left <code> '^'
134 %left <code> '&'
135 %left <code> EQCOMPARE
136 %left <code> ARITHCOMPARE
137 %left <code> LSHIFT RSHIFT
138 %left <code> '+' '-'
139 %left <code> '*' '/' '%'
140 %right <code> UNARY PLUSPLUS MINUSMINUS
141 %left HYPERUNARY
142 %left <code> POINTSAT '.' '(' '['
144 /* The Objective-C keywords. These are included in C and in
145 Objective C, so that the token codes are the same in both. */
146 %token INTERFACE IMPLEMENTATION END SELECTOR DEFS ENCODE
147 %token CLASSNAME PUBLIC PRIVATE PROTECTED PROTOCOL OBJECTNAME CLASS ALIAS
149 %type <code> unop
150 %type <ttype> ENUM STRUCT UNION IF ELSE WHILE DO FOR SWITCH CASE DEFAULT
151 %type <ttype> BREAK CONTINUE RETURN GOTO ASM_KEYWORD SIZEOF TYPEOF ALIGNOF
153 %type <ttype> identifier IDENTIFIER TYPENAME CONSTANT expr nonnull_exprlist exprlist
154 %type <ttype> expr_no_commas cast_expr unary_expr primary string STRING
155 %type <ttype> declspecs_nosc_nots_nosa_noea declspecs_nosc_nots_nosa_ea
156 %type <ttype> declspecs_nosc_nots_sa_noea declspecs_nosc_nots_sa_ea
157 %type <ttype> declspecs_nosc_ts_nosa_noea declspecs_nosc_ts_nosa_ea
158 %type <ttype> declspecs_nosc_ts_sa_noea declspecs_nosc_ts_sa_ea
159 %type <ttype> declspecs_sc_nots_nosa_noea declspecs_sc_nots_nosa_ea
160 %type <ttype> declspecs_sc_nots_sa_noea declspecs_sc_nots_sa_ea
161 %type <ttype> declspecs_sc_ts_nosa_noea declspecs_sc_ts_nosa_ea
162 %type <ttype> declspecs_sc_ts_sa_noea declspecs_sc_ts_sa_ea
163 %type <ttype> declspecs_ts declspecs_nots
164 %type <ttype> declspecs_ts_nosa declspecs_nots_nosa
165 %type <ttype> declspecs_nosc_ts declspecs_nosc_nots declspecs_nosc declspecs
166 %type <ttype> maybe_type_quals_attrs typespec_nonattr typespec_attr
167 %type <ttype> typespec_reserved_nonattr typespec_reserved_attr
168 %type <ttype> typespec_nonreserved_nonattr
170 %type <ttype> SCSPEC TYPESPEC TYPE_QUAL maybe_type_qual
171 %type <ttype> initdecls notype_initdecls initdcl notype_initdcl
172 %type <ttype> init maybeasm
173 %type <ttype> asm_operands nonnull_asm_operands asm_operand asm_clobbers
174 %type <ttype> maybe_attribute attributes attribute attribute_list attrib
175 %type <ttype> any_word extension
177 %type <ttype> compstmt compstmt_start compstmt_nostart compstmt_primary_start
178 %type <ttype> do_stmt_start poplevel stmt label
180 %type <ttype> c99_block_start c99_block_end
181 %type <ttype> declarator
182 %type <ttype> notype_declarator after_type_declarator
183 %type <ttype> parm_declarator
184 %type <ttype> parm_declarator_starttypename parm_declarator_nostarttypename
185 %type <ttype> array_declarator
187 %type <ttype> structsp_attr structsp_nonattr
188 %type <ttype> component_decl_list component_decl_list2
189 %type <ttype> component_decl components components_notype component_declarator
190 %type <ttype> component_notype_declarator
191 %type <ttype> enumlist enumerator
192 %type <ttype> struct_head union_head enum_head
193 %type <ttype> typename absdcl absdcl1 absdcl1_ea absdcl1_noea
194 %type <ttype> direct_absdcl1 absdcl_maybe_attribute
195 %type <ttype> xexpr parms parm firstparm identifiers
197 %type <ttype> parmlist parmlist_1 parmlist_2
198 %type <ttype> parmlist_or_identifiers parmlist_or_identifiers_1
199 %type <ttype> identifiers_or_typenames
201 %type <itype> setspecs setspecs_fp
203 %type <filename> save_filename
204 %type <lineno> save_lineno
205 \f
206 ifobjc
207 /* the Objective-C nonterminals */
209 %type <ttype> ivar_decl_list ivar_decls ivar_decl ivars ivar_declarator
210 %type <ttype> methoddecl unaryselector keywordselector selector
211 %type <ttype> keyworddecl receiver objcmessageexpr messageargs
212 %type <ttype> keywordexpr keywordarglist keywordarg
213 %type <ttype> myparms myparm optparmlist reservedwords objcselectorexpr
214 %type <ttype> selectorarg keywordnamelist keywordname objcencodeexpr
215 %type <ttype> objc_string non_empty_protocolrefs protocolrefs identifier_list objcprotocolexpr
217 %type <ttype> CLASSNAME OBJECTNAME
218 end ifobjc
219 \f
220 %{
221 /* Number of statements (loosely speaking) and compound statements
222 seen so far. */
223 static int stmt_count;
224 static int compstmt_count;
226 /* Input file and line number of the end of the body of last simple_if;
227 used by the stmt-rule immediately after simple_if returns. */
228 static const char *if_stmt_file;
229 static int if_stmt_line;
231 /* List of types and structure classes of the current declaration. */
232 static tree current_declspecs = NULL_TREE;
233 static tree prefix_attributes = NULL_TREE;
235 /* List of all the attributes applying to the identifier currently being
236 declared; includes prefix_attributes and possibly some more attributes
237 just after a comma. */
238 static tree all_prefix_attributes = NULL_TREE;
240 /* Stack of saved values of current_declspecs, prefix_attributes and
241 all_prefix_attributes. */
242 static tree declspec_stack;
244 /* PUSH_DECLSPEC_STACK is called from setspecs; POP_DECLSPEC_STACK
245 should be called from the productions making use of setspecs. */
246 #define PUSH_DECLSPEC_STACK \
247 do { \
248 declspec_stack = tree_cons (build_tree_list (prefix_attributes, \
249 all_prefix_attributes), \
250 current_declspecs, \
251 declspec_stack); \
252 } while (0)
254 #define POP_DECLSPEC_STACK \
255 do { \
256 current_declspecs = TREE_VALUE (declspec_stack); \
257 prefix_attributes = TREE_PURPOSE (TREE_PURPOSE (declspec_stack)); \
258 all_prefix_attributes = TREE_VALUE (TREE_PURPOSE (declspec_stack)); \
259 declspec_stack = TREE_CHAIN (declspec_stack); \
260 } while (0)
262 /* For __extension__, save/restore the warning flags which are
263 controlled by __extension__. */
264 #define SAVE_WARN_FLAGS() \
265 size_int (pedantic \
266 | (warn_pointer_arith << 1) \
267 | (warn_traditional << 2))
269 #define RESTORE_WARN_FLAGS(tval) \
270 do { \
271 int val = tree_low_cst (tval, 0); \
272 pedantic = val & 1; \
273 warn_pointer_arith = (val >> 1) & 1; \
274 warn_traditional = (val >> 2) & 1; \
275 } while (0)
277 ifobjc
278 /* Objective-C specific parser/lexer information */
280 static enum tree_code objc_inherit_code;
281 static int objc_pq_context = 0, objc_public_flag = 0;
283 /* The following flag is needed to contextualize ObjC lexical analysis.
284 In some cases (e.g., 'int NSObject;'), it is undesirable to bind
285 an identifier to an ObjC class, even if a class with that name
286 exists. */
287 static int objc_need_raw_identifier;
288 #define OBJC_NEED_RAW_IDENTIFIER(VAL) objc_need_raw_identifier = VAL
289 end ifobjc
291 ifc
292 #define OBJC_NEED_RAW_IDENTIFIER(VAL) /* nothing */
293 end ifc
295 /* Tell yyparse how to print a token's value, if yydebug is set. */
297 #define YYPRINT(FILE,YYCHAR,YYLVAL) yyprint(FILE,YYCHAR,YYLVAL)
299 static void yyprint PARAMS ((FILE *, int, YYSTYPE));
300 static void yyerror PARAMS ((const char *));
301 static int yylexname PARAMS ((void));
302 static inline int _yylex PARAMS ((void));
303 static int yylex PARAMS ((void));
304 static void init_reswords PARAMS ((void));
306 /* Add GC roots for variables local to this file. */
307 void
308 c_parse_init ()
309 {
310 init_reswords ();
312 ggc_add_tree_root (&declspec_stack, 1);
313 ggc_add_tree_root (¤t_declspecs, 1);
314 ggc_add_tree_root (&prefix_attributes, 1);
315 ggc_add_tree_root (&all_prefix_attributes, 1);
316 }
318 %}
319 \f
320 %%
321 program: /* empty */
322 { if (pedantic)
323 pedwarn ("ISO C forbids an empty source file");
324 finish_file ();
325 }
326 | extdefs
327 {
328 /* In case there were missing closebraces,
329 get us back to the global binding level. */
330 while (! global_bindings_p ())
331 poplevel (0, 0, 0);
332 ifc
333 finish_fname_decls ();
334 end ifc
335 finish_file ();
336 }
337 ;
339 /* the reason for the strange actions in this rule
340 is so that notype_initdecls when reached via datadef
341 can find a valid list of type and sc specs in $0. */
343 extdefs:
344 {$<ttype>$ = NULL_TREE; } extdef
345 | extdefs {$<ttype>$ = NULL_TREE; ggc_collect(); } extdef
346 ;
348 extdef:
349 fndef
350 | datadef
351 ifobjc
352 | objcdef
353 end ifobjc
354 | ASM_KEYWORD '(' expr ')' ';'
355 { STRIP_NOPS ($3);
356 if ((TREE_CODE ($3) == ADDR_EXPR
357 && TREE_CODE (TREE_OPERAND ($3, 0)) == STRING_CST)
358 || TREE_CODE ($3) == STRING_CST)
359 assemble_asm ($3);
360 else
361 error ("argument of `asm' is not a constant string"); }
362 | extension extdef
363 { RESTORE_WARN_FLAGS ($1); }
364 ;
366 datadef:
367 setspecs notype_initdecls ';'
368 { if (pedantic)
369 error ("ISO C forbids data definition with no type or storage class");
370 else if (!flag_traditional)
371 warning ("data definition has no type or storage class");
373 POP_DECLSPEC_STACK; }
374 | declspecs_nots setspecs notype_initdecls ';'
375 { POP_DECLSPEC_STACK; }
376 | declspecs_ts setspecs initdecls ';'
377 { POP_DECLSPEC_STACK; }
378 | declspecs ';'
379 { shadow_tag ($1); }
380 | error ';'
381 | error '}'
382 | ';'
383 { if (pedantic)
384 pedwarn ("ISO C does not allow extra `;' outside of a function"); }
385 ;
386 \f
387 fndef:
388 declspecs_ts setspecs declarator
389 { if (! start_function (current_declspecs, $3,
390 all_prefix_attributes))
391 YYERROR1;
392 }
393 old_style_parm_decls
394 { store_parm_decls (); }
395 save_filename save_lineno compstmt_or_error
396 { DECL_SOURCE_FILE (current_function_decl) = $7;
397 DECL_SOURCE_LINE (current_function_decl) = $8;
398 finish_function (0);
399 POP_DECLSPEC_STACK; }
400 | declspecs_ts setspecs declarator error
401 { POP_DECLSPEC_STACK; }
402 | declspecs_nots setspecs notype_declarator
403 { if (! start_function (current_declspecs, $3,
404 all_prefix_attributes))
405 YYERROR1;
406 }
407 old_style_parm_decls
408 { store_parm_decls (); }
409 save_filename save_lineno compstmt_or_error
410 { DECL_SOURCE_FILE (current_function_decl) = $7;
411 DECL_SOURCE_LINE (current_function_decl) = $8;
412 finish_function (0);
413 POP_DECLSPEC_STACK; }
414 | declspecs_nots setspecs notype_declarator error
415 { POP_DECLSPEC_STACK; }
416 | setspecs notype_declarator
417 { if (! start_function (NULL_TREE, $2,
418 all_prefix_attributes))
419 YYERROR1;
420 }
421 old_style_parm_decls
422 { store_parm_decls (); }
423 save_filename save_lineno compstmt_or_error
424 { DECL_SOURCE_FILE (current_function_decl) = $6;
425 DECL_SOURCE_LINE (current_function_decl) = $7;
426 finish_function (0);
427 POP_DECLSPEC_STACK; }
428 | setspecs notype_declarator error
429 { POP_DECLSPEC_STACK; }
430 ;
432 identifier:
433 IDENTIFIER
434 | TYPENAME
435 ifobjc
436 | OBJECTNAME
437 | CLASSNAME
438 end ifobjc
439 ;
441 unop: '&'
442 { $$ = ADDR_EXPR; }
443 | '-'
444 { $$ = NEGATE_EXPR; }
445 | '+'
446 { $$ = CONVERT_EXPR;
447 ifc
448 if (warn_traditional && !in_system_header)
449 warning ("traditional C rejects the unary plus operator");
450 end ifc
451 }
452 | PLUSPLUS
453 { $$ = PREINCREMENT_EXPR; }
454 | MINUSMINUS
455 { $$ = PREDECREMENT_EXPR; }
456 | '~'
457 { $$ = BIT_NOT_EXPR; }
458 | '!'
459 { $$ = TRUTH_NOT_EXPR; }
460 ;
462 expr: nonnull_exprlist
463 { $$ = build_compound_expr ($1); }
464 ;
466 exprlist:
467 /* empty */
468 { $$ = NULL_TREE; }
469 | nonnull_exprlist
470 ;
472 nonnull_exprlist:
473 expr_no_commas
474 { $$ = build_tree_list (NULL_TREE, $1); }
475 | nonnull_exprlist ',' expr_no_commas
476 { chainon ($1, build_tree_list (NULL_TREE, $3)); }
477 ;
479 unary_expr:
480 primary
481 | '*' cast_expr %prec UNARY
482 { $$ = build_indirect_ref ($2, "unary *"); }
483 /* __extension__ turns off -pedantic for following primary. */
484 | extension cast_expr %prec UNARY
485 { $$ = $2;
486 RESTORE_WARN_FLAGS ($1); }
487 | unop cast_expr %prec UNARY
488 { $$ = build_unary_op ($1, $2, 0);
489 overflow_warning ($$); }
490 /* Refer to the address of a label as a pointer. */
491 | ANDAND identifier
492 { $$ = finish_label_address_expr ($2); }
493 /* This seems to be impossible on some machines, so let's turn it off.
494 You can use __builtin_next_arg to find the anonymous stack args.
495 | '&' ELLIPSIS
496 { tree types = TYPE_ARG_TYPES (TREE_TYPE (current_function_decl));
497 $$ = error_mark_node;
498 if (TREE_VALUE (tree_last (types)) == void_type_node)
499 error ("`&...' used in function with fixed number of arguments");
500 else
501 {
502 if (pedantic)
503 pedwarn ("ISO C forbids `&...'");
504 $$ = tree_last (DECL_ARGUMENTS (current_function_decl));
505 $$ = build_unary_op (ADDR_EXPR, $$, 0);
506 } }
507 */
508 | sizeof unary_expr %prec UNARY
509 { skip_evaluation--;
510 if (TREE_CODE ($2) == COMPONENT_REF
511 && DECL_C_BIT_FIELD (TREE_OPERAND ($2, 1)))
512 error ("`sizeof' applied to a bit-field");
513 $$ = c_sizeof (TREE_TYPE ($2)); }
514 | sizeof '(' typename ')' %prec HYPERUNARY
515 { skip_evaluation--;
516 $$ = c_sizeof (groktypename ($3)); }
517 | alignof unary_expr %prec UNARY
518 { skip_evaluation--;
519 $$ = c_alignof_expr ($2); }
520 | alignof '(' typename ')' %prec HYPERUNARY
521 { skip_evaluation--;
522 $$ = c_alignof (groktypename ($3)); }
523 | REALPART cast_expr %prec UNARY
524 { $$ = build_unary_op (REALPART_EXPR, $2, 0); }
525 | IMAGPART cast_expr %prec UNARY
526 { $$ = build_unary_op (IMAGPART_EXPR, $2, 0); }
527 ;
529 sizeof:
530 SIZEOF { skip_evaluation++; }
531 ;
533 alignof:
534 ALIGNOF { skip_evaluation++; }
535 ;
537 cast_expr:
538 unary_expr
539 | '(' typename ')' cast_expr %prec UNARY
540 { $$ = c_cast_expr ($2, $4); }
541 ;
543 expr_no_commas:
544 cast_expr
545 | expr_no_commas '+' expr_no_commas
546 { $$ = parser_build_binary_op ($2, $1, $3); }
547 | expr_no_commas '-' expr_no_commas
548 { $$ = 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 { $$ = parser_build_binary_op ($2, $1, $3); }
555 | expr_no_commas LSHIFT expr_no_commas
556 { $$ = parser_build_binary_op ($2, $1, $3); }
557 | expr_no_commas RSHIFT expr_no_commas
558 { $$ = parser_build_binary_op ($2, $1, $3); }
559 | expr_no_commas ARITHCOMPARE expr_no_commas
560 { $$ = parser_build_binary_op ($2, $1, $3); }
561 | expr_no_commas EQCOMPARE expr_no_commas
562 { $$ = parser_build_binary_op ($2, $1, $3); }
563 | expr_no_commas '&' expr_no_commas
564 { $$ = 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 ANDAND
570 { $1 = truthvalue_conversion (default_conversion ($1));
571 skip_evaluation += $1 == boolean_false_node; }
572 expr_no_commas
573 { skip_evaluation -= $1 == boolean_false_node;
574 $$ = parser_build_binary_op (TRUTH_ANDIF_EXPR, $1, $4); }
575 | expr_no_commas OROR
576 { $1 = truthvalue_conversion (default_conversion ($1));
577 skip_evaluation += $1 == boolean_true_node; }
578 expr_no_commas
579 { skip_evaluation -= $1 == boolean_true_node;
580 $$ = parser_build_binary_op (TRUTH_ORIF_EXPR, $1, $4); }
581 | expr_no_commas '?'
582 { $1 = truthvalue_conversion (default_conversion ($1));
583 skip_evaluation += $1 == boolean_false_node; }
584 expr ':'
585 { skip_evaluation += (($1 == boolean_true_node)
586 - ($1 == boolean_false_node)); }
587 expr_no_commas
588 { skip_evaluation -= $1 == boolean_true_node;
589 $$ = build_conditional_expr ($1, $4, $7); }
590 | expr_no_commas '?'
591 { if (pedantic)
592 pedwarn ("ISO C forbids omitting the middle term of a ?: expression");
593 /* Make sure first operand is calculated only once. */
594 $<ttype>2 = save_expr ($1);
595 $1 = truthvalue_conversion (default_conversion ($<ttype>2));
596 skip_evaluation += $1 == boolean_true_node; }
597 ':' expr_no_commas
598 { skip_evaluation -= $1 == boolean_true_node;
599 $$ = build_conditional_expr ($1, $<ttype>2, $5); }
600 | expr_no_commas '=' expr_no_commas
601 { char class;
602 $$ = build_modify_expr ($1, NOP_EXPR, $3);
603 class = TREE_CODE_CLASS (TREE_CODE ($$));
604 if (IS_EXPR_CODE_CLASS (class))
605 C_SET_EXP_ORIGINAL_CODE ($$, MODIFY_EXPR);
606 }
607 | expr_no_commas ASSIGN expr_no_commas
608 { char class;
609 $$ = build_modify_expr ($1, $2, $3);
610 /* This inhibits warnings in truthvalue_conversion. */
611 class = TREE_CODE_CLASS (TREE_CODE ($$));
612 if (IS_EXPR_CODE_CLASS (class))
613 C_SET_EXP_ORIGINAL_CODE ($$, ERROR_MARK);
614 }
615 ;
617 primary:
618 IDENTIFIER
619 {
620 if (yychar == YYEMPTY)
621 yychar = YYLEX;
622 $$ = build_external_ref ($1, yychar == '(');
623 }
624 | CONSTANT
625 | string
626 { $$ = combine_strings ($1); }
627 | VAR_FUNC_NAME
628 { $$ = fname_decl (C_RID_CODE ($$), $$); }
629 | '(' typename ')' '{'
630 { start_init (NULL_TREE, NULL, 0);
631 $2 = groktypename ($2);
632 really_start_incremental_init ($2); }
633 initlist_maybe_comma '}' %prec UNARY
634 { tree constructor = pop_init_level (0);
635 tree type = $2;
636 finish_init ();
638 if (pedantic && ! flag_isoc99)
639 pedwarn ("ISO C89 forbids compound literals");
640 $$ = build_compound_literal (type, constructor);
641 }
642 | '(' expr ')'
643 { char class = TREE_CODE_CLASS (TREE_CODE ($2));
644 if (IS_EXPR_CODE_CLASS (class))
645 C_SET_EXP_ORIGINAL_CODE ($2, ERROR_MARK);
646 $$ = $2; }
647 | '(' error ')'
648 { $$ = error_mark_node; }
649 | compstmt_primary_start compstmt_nostart ')'
650 { tree saved_last_tree;
652 if (pedantic)
653 pedwarn ("ISO C forbids braced-groups within expressions");
654 pop_label_level ();
656 saved_last_tree = COMPOUND_BODY ($1);
657 RECHAIN_STMTS ($1, COMPOUND_BODY ($1));
658 last_tree = saved_last_tree;
659 TREE_CHAIN (last_tree) = NULL_TREE;
660 if (!last_expr_type)
661 last_expr_type = void_type_node;
662 $$ = build1 (STMT_EXPR, last_expr_type, $1);
663 TREE_SIDE_EFFECTS ($$) = 1;
664 }
665 | compstmt_primary_start error ')'
666 {
667 pop_label_level ();
668 last_tree = COMPOUND_BODY ($1);
669 TREE_CHAIN (last_tree) = NULL_TREE;
670 $$ = error_mark_node;
671 }
672 | primary '(' exprlist ')' %prec '.'
673 { $$ = build_function_call ($1, $3); }
674 | VA_ARG '(' expr_no_commas ',' typename ')'
675 { $$ = build_va_arg ($3, groktypename ($5)); }
677 | CHOOSE_EXPR '(' expr_no_commas ',' expr_no_commas ',' expr_no_commas ')'
678 {
679 tree c;
681 c = fold ($3);
682 STRIP_NOPS (c);
683 if (TREE_CODE (c) != INTEGER_CST)
684 error ("first argument to __builtin_choose_expr not a constant");
685 $$ = integer_zerop (c) ? $7 : $5;
686 }
687 | TYPES_COMPATIBLE_P '(' typename ',' typename ')'
688 {
689 tree e1, e2;
691 e1 = TYPE_MAIN_VARIANT (groktypename ($3));
692 e2 = TYPE_MAIN_VARIANT (groktypename ($5));
694 $$ = comptypes (e1, e2)
695 ? build_int_2 (1, 0) : build_int_2 (0, 0);
696 }
697 | primary '[' expr ']' %prec '.'
698 { $$ = build_array_ref ($1, $3); }
699 | primary '.' identifier
700 {
701 ifobjc
702 if (!is_public ($1, $3))
703 $$ = error_mark_node;
704 else
705 end ifobjc
706 $$ = build_component_ref ($1, $3);
707 }
708 | primary POINTSAT identifier
709 {
710 tree expr = build_indirect_ref ($1, "->");
712 ifobjc
713 if (!is_public (expr, $3))
714 $$ = error_mark_node;
715 else
716 end ifobjc
717 $$ = build_component_ref (expr, $3);
718 }
719 | primary PLUSPLUS
720 { $$ = build_unary_op (POSTINCREMENT_EXPR, $1, 0); }
721 | primary MINUSMINUS
722 { $$ = build_unary_op (POSTDECREMENT_EXPR, $1, 0); }
723 ifobjc
724 | objcmessageexpr
725 { $$ = build_message_expr ($1); }
726 | objcselectorexpr
727 { $$ = build_selector_expr ($1); }
728 | objcprotocolexpr
729 { $$ = build_protocol_expr ($1); }
730 | objcencodeexpr
731 { $$ = build_encode_expr ($1); }
732 | objc_string
733 { $$ = build_objc_string_object ($1); }
734 end ifobjc
735 ;
737 /* Produces a STRING_CST with perhaps more STRING_CSTs chained onto it. */
738 string:
739 STRING
740 | string STRING
741 {
742 ifc
743 static int last_lineno = 0;
744 static const char *last_input_filename = 0;
745 end ifc
746 $$ = chainon ($1, $2);
747 ifc
748 if (warn_traditional && !in_system_header
749 && (lineno != last_lineno || !last_input_filename ||
750 strcmp (last_input_filename, input_filename)))
751 {
752 warning ("traditional C rejects string concatenation");
753 last_lineno = lineno;
754 last_input_filename = input_filename;
755 }
756 end ifc
757 }
758 ;
760 ifobjc
761 /* Produces an STRING_CST with perhaps more STRING_CSTs chained
762 onto it, which is to be read as an ObjC string object. */
763 objc_string:
764 '@' STRING
765 { $$ = $2; }
766 | objc_string '@' STRING
767 { $$ = chainon ($1, $3); }
768 ;
769 end ifobjc
771 old_style_parm_decls:
772 /* empty */
773 | datadecls
774 | datadecls ELLIPSIS
775 /* ... is used here to indicate a varargs function. */
776 { c_mark_varargs ();
777 if (pedantic)
778 pedwarn ("ISO C does not permit use of `varargs.h'"); }
779 ;
781 /* The following are analogous to lineno_decl, decls and decl
782 except that they do not allow nested functions.
783 They are used for old-style parm decls. */
784 lineno_datadecl:
785 save_filename save_lineno datadecl
786 { }
787 ;
789 datadecls:
790 lineno_datadecl
791 | errstmt
792 | datadecls lineno_datadecl
793 | lineno_datadecl errstmt
794 ;
796 /* We don't allow prefix attributes here because they cause reduce/reduce
797 conflicts: we can't know whether we're parsing a function decl with
798 attribute suffix, or function defn with attribute prefix on first old
799 style parm. */
800 datadecl:
801 declspecs_ts_nosa setspecs initdecls ';'
802 { POP_DECLSPEC_STACK; }
803 | declspecs_nots_nosa setspecs notype_initdecls ';'
804 { POP_DECLSPEC_STACK; }
805 | declspecs_ts_nosa ';'
806 { shadow_tag_warned ($1, 1);
807 pedwarn ("empty declaration"); }
808 | declspecs_nots_nosa ';'
809 { pedwarn ("empty declaration"); }
810 ;
812 /* This combination which saves a lineno before a decl
813 is the normal thing to use, rather than decl itself.
814 This is to avoid shift/reduce conflicts in contexts
815 where statement labels are allowed. */
816 lineno_decl:
817 save_filename save_lineno decl
818 { }
819 ;
821 /* records the type and storage class specs to use for processing
822 the declarators that follow.
823 Maintains a stack of outer-level values of current_declspecs,
824 for the sake of parm declarations nested in function declarators. */
825 setspecs: /* empty */
826 { pending_xref_error ();
827 PUSH_DECLSPEC_STACK;
828 split_specs_attrs ($<ttype>0,
829 ¤t_declspecs, &prefix_attributes);
830 all_prefix_attributes = prefix_attributes; }
831 ;
833 /* Possibly attributes after a comma, which should reset all_prefix_attributes
834 to prefix_attributes with these ones chained on the front. */
835 maybe_resetattrs:
836 maybe_attribute
837 { all_prefix_attributes = chainon ($1, prefix_attributes); }
838 ;
840 decl:
841 declspecs_ts setspecs initdecls ';'
842 { POP_DECLSPEC_STACK; }
843 | declspecs_nots setspecs notype_initdecls ';'
844 { POP_DECLSPEC_STACK; }
845 | declspecs_ts setspecs nested_function
846 { POP_DECLSPEC_STACK; }
847 | declspecs_nots setspecs notype_nested_function
848 { POP_DECLSPEC_STACK; }
849 | declspecs ';'
850 { shadow_tag ($1); }
851 | extension decl
852 { RESTORE_WARN_FLAGS ($1); }
853 ;
855 /* A list of declaration specifiers. These are:
857 - Storage class specifiers (SCSPEC), which for GCC currently include
858 function specifiers ("inline").
860 - Type specifiers (typespec_*).
862 - Type qualifiers (TYPE_QUAL).
864 - Attribute specifier lists (attributes).
866 These are stored as a TREE_LIST; the head of the list is the last
867 item in the specifier list. Each entry in the list has either a
868 TREE_PURPOSE that is an attribute specifier list, or a TREE_VALUE that
869 is a single other specifier or qualifier; and a TREE_CHAIN that is the
870 rest of the list. TREE_STATIC is set on the list if something other
871 than a storage class specifier or attribute has been seen; this is used
872 to warn for the obsolescent usage of storage class specifiers other than
873 at the start of the list. (Doing this properly would require function
874 specifiers to be handled separately from storage class specifiers.)
876 The various cases below are classified according to:
878 (a) Whether a storage class specifier is included or not; some
879 places in the grammar disallow storage class specifiers (_sc or _nosc).
881 (b) Whether a type specifier has been seen; after a type specifier,
882 a typedef name is an identifier to redeclare (_ts or _nots).
884 (c) Whether the list starts with an attribute; in certain places,
885 the grammar requires specifiers that don't start with an attribute
886 (_sa or _nosa).
888 (d) Whether the list ends with an attribute (or a specifier such that
889 any following attribute would have been parsed as part of that specifier);
890 this avoids shift-reduce conflicts in the parsing of attributes
891 (_ea or _noea).
893 TODO:
895 (i) Distinguish between function specifiers and storage class specifiers,
896 at least for the purpose of warnings about obsolescent usage.
898 (ii) Halve the number of productions here by eliminating the _sc/_nosc
899 distinction and instead checking where required that storage class
900 specifiers aren't present. */
902 /* Declspecs which contain at least one type specifier or typedef name.
903 (Just `const' or `volatile' is not enough.)
904 A typedef'd name following these is taken as a name to be declared.
905 Declspecs have a non-NULL TREE_VALUE, attributes do not. */
907 declspecs_nosc_nots_nosa_noea:
908 TYPE_QUAL
909 { $$ = tree_cons (NULL_TREE, $1, NULL_TREE);
910 TREE_STATIC ($$) = 1; }
911 | declspecs_nosc_nots_nosa_noea TYPE_QUAL
912 { $$ = tree_cons (NULL_TREE, $2, $1);
913 TREE_STATIC ($$) = 1; }
914 | declspecs_nosc_nots_nosa_ea TYPE_QUAL
915 { $$ = tree_cons (NULL_TREE, $2, $1);
916 TREE_STATIC ($$) = 1; }
917 ;
919 declspecs_nosc_nots_nosa_ea:
920 declspecs_nosc_nots_nosa_noea attributes
921 { $$ = tree_cons ($2, NULL_TREE, $1);
922 TREE_STATIC ($$) = TREE_STATIC ($1); }
923 ;
925 declspecs_nosc_nots_sa_noea:
926 declspecs_nosc_nots_sa_noea TYPE_QUAL
927 { $$ = tree_cons (NULL_TREE, $2, $1);
928 TREE_STATIC ($$) = 1; }
929 | declspecs_nosc_nots_sa_ea TYPE_QUAL
930 { $$ = tree_cons (NULL_TREE, $2, $1);
931 TREE_STATIC ($$) = 1; }
932 ;
934 declspecs_nosc_nots_sa_ea:
935 attributes
936 { $$ = tree_cons ($1, NULL_TREE, NULL_TREE);
937 TREE_STATIC ($$) = 0; }
938 | declspecs_nosc_nots_sa_noea attributes
939 { $$ = tree_cons ($2, NULL_TREE, $1);
940 TREE_STATIC ($$) = TREE_STATIC ($1); }
941 ;
943 declspecs_nosc_ts_nosa_noea:
944 typespec_nonattr
945 { $$ = tree_cons (NULL_TREE, $1, NULL_TREE);
946 TREE_STATIC ($$) = 1; }
947 | declspecs_nosc_ts_nosa_noea TYPE_QUAL
948 { $$ = tree_cons (NULL_TREE, $2, $1);
949 TREE_STATIC ($$) = 1; }
950 | declspecs_nosc_ts_nosa_ea TYPE_QUAL
951 { $$ = tree_cons (NULL_TREE, $2, $1);
952 TREE_STATIC ($$) = 1; }
953 | declspecs_nosc_ts_nosa_noea typespec_reserved_nonattr
954 { $$ = tree_cons (NULL_TREE, $2, $1);
955 TREE_STATIC ($$) = 1; }
956 | declspecs_nosc_ts_nosa_ea typespec_reserved_nonattr
957 { $$ = tree_cons (NULL_TREE, $2, $1);
958 TREE_STATIC ($$) = 1; }
959 | declspecs_nosc_nots_nosa_noea typespec_nonattr
960 { $$ = tree_cons (NULL_TREE, $2, $1);
961 TREE_STATIC ($$) = 1; }
962 | declspecs_nosc_nots_nosa_ea typespec_nonattr
963 { $$ = tree_cons (NULL_TREE, $2, $1);
964 TREE_STATIC ($$) = 1; }
965 ;
967 declspecs_nosc_ts_nosa_ea:
968 typespec_attr
969 { $$ = tree_cons (NULL_TREE, $1, NULL_TREE);
970 TREE_STATIC ($$) = 1; }
971 | declspecs_nosc_ts_nosa_noea attributes
972 { $$ = tree_cons ($2, NULL_TREE, $1);
973 TREE_STATIC ($$) = TREE_STATIC ($1); }
974 | declspecs_nosc_ts_nosa_noea typespec_reserved_attr
975 { $$ = tree_cons (NULL_TREE, $2, $1);
976 TREE_STATIC ($$) = 1; }
977 | declspecs_nosc_ts_nosa_ea typespec_reserved_attr
978 { $$ = tree_cons (NULL_TREE, $2, $1);
979 TREE_STATIC ($$) = 1; }
980 | declspecs_nosc_nots_nosa_noea typespec_attr
981 { $$ = tree_cons (NULL_TREE, $2, $1);
982 TREE_STATIC ($$) = 1; }
983 | declspecs_nosc_nots_nosa_ea typespec_attr
984 { $$ = tree_cons (NULL_TREE, $2, $1);
985 TREE_STATIC ($$) = 1; }
986 ;
988 declspecs_nosc_ts_sa_noea:
989 declspecs_nosc_ts_sa_noea TYPE_QUAL
990 { $$ = tree_cons (NULL_TREE, $2, $1);
991 TREE_STATIC ($$) = 1; }
992 | declspecs_nosc_ts_sa_ea TYPE_QUAL
993 { $$ = tree_cons (NULL_TREE, $2, $1);
994 TREE_STATIC ($$) = 1; }
995 | declspecs_nosc_ts_sa_noea typespec_reserved_nonattr
996 { $$ = tree_cons (NULL_TREE, $2, $1);
997 TREE_STATIC ($$) = 1; }
998 | declspecs_nosc_ts_sa_ea typespec_reserved_nonattr
999 { $$ = tree_cons (NULL_TREE, $2, $1);
1000 TREE_STATIC ($$) = 1; }
1001 | declspecs_nosc_nots_sa_noea typespec_nonattr
1002 { $$ = tree_cons (NULL_TREE, $2, $1);
1003 TREE_STATIC ($$) = 1; }
1004 | declspecs_nosc_nots_sa_ea typespec_nonattr
1005 { $$ = tree_cons (NULL_TREE, $2, $1);
1006 TREE_STATIC ($$) = 1; }
1007 ;
1009 declspecs_nosc_ts_sa_ea:
1010 declspecs_nosc_ts_sa_noea attributes
1011 { $$ = tree_cons ($2, NULL_TREE, $1);
1012 TREE_STATIC ($$) = TREE_STATIC ($1); }
1013 | declspecs_nosc_ts_sa_noea typespec_reserved_attr
1014 { $$ = tree_cons (NULL_TREE, $2, $1);
1015 TREE_STATIC ($$) = 1; }
1016 | declspecs_nosc_ts_sa_ea typespec_reserved_attr
1017 { $$ = tree_cons (NULL_TREE, $2, $1);
1018 TREE_STATIC ($$) = 1; }
1019 | declspecs_nosc_nots_sa_noea typespec_attr
1020 { $$ = tree_cons (NULL_TREE, $2, $1);
1021 TREE_STATIC ($$) = 1; }
1022 | declspecs_nosc_nots_sa_ea typespec_attr
1023 { $$ = tree_cons (NULL_TREE, $2, $1);
1024 TREE_STATIC ($$) = 1; }
1025 ;
1027 declspecs_sc_nots_nosa_noea:
1028 SCSPEC
1029 { $$ = tree_cons (NULL_TREE, $1, NULL_TREE);
1030 TREE_STATIC ($$) = 0; }
1031 | declspecs_sc_nots_nosa_noea TYPE_QUAL
1032 { $$ = tree_cons (NULL_TREE, $2, $1);
1033 TREE_STATIC ($$) = 1; }
1034 | declspecs_sc_nots_nosa_ea TYPE_QUAL
1035 { $$ = tree_cons (NULL_TREE, $2, $1);
1036 TREE_STATIC ($$) = 1; }
1037 | declspecs_nosc_nots_nosa_noea SCSPEC
1038 { if (extra_warnings && TREE_STATIC ($1))
1039 warning ("`%s' is not at beginning of declaration",
1040 IDENTIFIER_POINTER ($2));
1041 $$ = tree_cons (NULL_TREE, $2, $1);
1042 TREE_STATIC ($$) = TREE_STATIC ($1); }
1043 | declspecs_nosc_nots_nosa_ea SCSPEC
1044 { if (extra_warnings && TREE_STATIC ($1))
1045 warning ("`%s' is not at beginning of declaration",
1046 IDENTIFIER_POINTER ($2));
1047 $$ = tree_cons (NULL_TREE, $2, $1);
1048 TREE_STATIC ($$) = TREE_STATIC ($1); }
1049 | declspecs_sc_nots_nosa_noea SCSPEC
1050 { if (extra_warnings && TREE_STATIC ($1))
1051 warning ("`%s' is not at beginning of declaration",
1052 IDENTIFIER_POINTER ($2));
1053 $$ = tree_cons (NULL_TREE, $2, $1);
1054 TREE_STATIC ($$) = TREE_STATIC ($1); }
1055 | declspecs_sc_nots_nosa_ea SCSPEC
1056 { if (extra_warnings && TREE_STATIC ($1))
1057 warning ("`%s' is not at beginning of declaration",
1058 IDENTIFIER_POINTER ($2));
1059 $$ = tree_cons (NULL_TREE, $2, $1);
1060 TREE_STATIC ($$) = TREE_STATIC ($1); }
1061 ;
1063 declspecs_sc_nots_nosa_ea:
1064 declspecs_sc_nots_nosa_noea attributes
1065 { $$ = tree_cons ($2, NULL_TREE, $1);
1066 TREE_STATIC ($$) = TREE_STATIC ($1); }
1067 ;
1069 declspecs_sc_nots_sa_noea:
1070 declspecs_sc_nots_sa_noea TYPE_QUAL
1071 { $$ = tree_cons (NULL_TREE, $2, $1);
1072 TREE_STATIC ($$) = 1; }
1073 | declspecs_sc_nots_sa_ea TYPE_QUAL
1074 { $$ = tree_cons (NULL_TREE, $2, $1);
1075 TREE_STATIC ($$) = 1; }
1076 | declspecs_nosc_nots_sa_noea SCSPEC
1077 { if (extra_warnings && TREE_STATIC ($1))
1078 warning ("`%s' is not at beginning of declaration",
1079 IDENTIFIER_POINTER ($2));
1080 $$ = tree_cons (NULL_TREE, $2, $1);
1081 TREE_STATIC ($$) = TREE_STATIC ($1); }
1082 | declspecs_nosc_nots_sa_ea SCSPEC
1083 { if (extra_warnings && TREE_STATIC ($1))
1084 warning ("`%s' is not at beginning of declaration",
1085 IDENTIFIER_POINTER ($2));
1086 $$ = tree_cons (NULL_TREE, $2, $1);
1087 TREE_STATIC ($$) = TREE_STATIC ($1); }
1088 | declspecs_sc_nots_sa_noea SCSPEC
1089 { if (extra_warnings && TREE_STATIC ($1))
1090 warning ("`%s' is not at beginning of declaration",
1091 IDENTIFIER_POINTER ($2));
1092 $$ = tree_cons (NULL_TREE, $2, $1);
1093 TREE_STATIC ($$) = TREE_STATIC ($1); }
1094 | declspecs_sc_nots_sa_ea SCSPEC
1095 { if (extra_warnings && TREE_STATIC ($1))
1096 warning ("`%s' is not at beginning of declaration",
1097 IDENTIFIER_POINTER ($2));
1098 $$ = tree_cons (NULL_TREE, $2, $1);
1099 TREE_STATIC ($$) = TREE_STATIC ($1); }
1100 ;
1102 declspecs_sc_nots_sa_ea:
1103 declspecs_sc_nots_sa_noea attributes
1104 { $$ = tree_cons ($2, NULL_TREE, $1);
1105 TREE_STATIC ($$) = TREE_STATIC ($1); }
1106 ;
1108 declspecs_sc_ts_nosa_noea:
1109 declspecs_sc_ts_nosa_noea TYPE_QUAL
1110 { $$ = tree_cons (NULL_TREE, $2, $1);
1111 TREE_STATIC ($$) = 1; }
1112 | declspecs_sc_ts_nosa_ea TYPE_QUAL
1113 { $$ = tree_cons (NULL_TREE, $2, $1);
1114 TREE_STATIC ($$) = 1; }
1115 | declspecs_sc_ts_nosa_noea typespec_reserved_nonattr
1116 { $$ = tree_cons (NULL_TREE, $2, $1);
1117 TREE_STATIC ($$) = 1; }
1118 | declspecs_sc_ts_nosa_ea typespec_reserved_nonattr
1119 { $$ = tree_cons (NULL_TREE, $2, $1);
1120 TREE_STATIC ($$) = 1; }
1121 | declspecs_sc_nots_nosa_noea typespec_nonattr
1122 { $$ = tree_cons (NULL_TREE, $2, $1);
1123 TREE_STATIC ($$) = 1; }
1124 | declspecs_sc_nots_nosa_ea typespec_nonattr
1125 { $$ = tree_cons (NULL_TREE, $2, $1);
1126 TREE_STATIC ($$) = 1; }
1127 | declspecs_nosc_ts_nosa_noea SCSPEC
1128 { if (extra_warnings && TREE_STATIC ($1))
1129 warning ("`%s' is not at beginning of declaration",
1130 IDENTIFIER_POINTER ($2));
1131 $$ = tree_cons (NULL_TREE, $2, $1);
1132 TREE_STATIC ($$) = TREE_STATIC ($1); }
1133 | declspecs_nosc_ts_nosa_ea SCSPEC
1134 { if (extra_warnings && TREE_STATIC ($1))
1135 warning ("`%s' is not at beginning of declaration",
1136 IDENTIFIER_POINTER ($2));
1137 $$ = tree_cons (NULL_TREE, $2, $1);
1138 TREE_STATIC ($$) = TREE_STATIC ($1); }
1139 | declspecs_sc_ts_nosa_noea SCSPEC
1140 { if (extra_warnings && TREE_STATIC ($1))
1141 warning ("`%s' is not at beginning of declaration",
1142 IDENTIFIER_POINTER ($2));
1143 $$ = tree_cons (NULL_TREE, $2, $1);
1144 TREE_STATIC ($$) = TREE_STATIC ($1); }
1145 | declspecs_sc_ts_nosa_ea SCSPEC
1146 { if (extra_warnings && TREE_STATIC ($1))
1147 warning ("`%s' is not at beginning of declaration",
1148 IDENTIFIER_POINTER ($2));
1149 $$ = tree_cons (NULL_TREE, $2, $1);
1150 TREE_STATIC ($$) = TREE_STATIC ($1); }
1151 ;
1153 declspecs_sc_ts_nosa_ea:
1154 declspecs_sc_ts_nosa_noea attributes
1155 { $$ = tree_cons ($2, NULL_TREE, $1);
1156 TREE_STATIC ($$) = TREE_STATIC ($1); }
1157 | declspecs_sc_ts_nosa_noea typespec_reserved_attr
1158 { $$ = tree_cons (NULL_TREE, $2, $1);
1159 TREE_STATIC ($$) = 1; }
1160 | declspecs_sc_ts_nosa_ea typespec_reserved_attr
1161 { $$ = tree_cons (NULL_TREE, $2, $1);
1162 TREE_STATIC ($$) = 1; }
1163 | declspecs_sc_nots_nosa_noea typespec_attr
1164 { $$ = tree_cons (NULL_TREE, $2, $1);
1165 TREE_STATIC ($$) = 1; }
1166 | declspecs_sc_nots_nosa_ea typespec_attr
1167 { $$ = tree_cons (NULL_TREE, $2, $1);
1168 TREE_STATIC ($$) = 1; }
1169 ;
1171 declspecs_sc_ts_sa_noea:
1172 declspecs_sc_ts_sa_noea TYPE_QUAL
1173 { $$ = tree_cons (NULL_TREE, $2, $1);
1174 TREE_STATIC ($$) = 1; }
1175 | declspecs_sc_ts_sa_ea TYPE_QUAL
1176 { $$ = tree_cons (NULL_TREE, $2, $1);
1177 TREE_STATIC ($$) = 1; }
1178 | declspecs_sc_ts_sa_noea typespec_reserved_nonattr
1179 { $$ = tree_cons (NULL_TREE, $2, $1);
1180 TREE_STATIC ($$) = 1; }
1181 | declspecs_sc_ts_sa_ea typespec_reserved_nonattr
1182 { $$ = tree_cons (NULL_TREE, $2, $1);
1183 TREE_STATIC ($$) = 1; }
1184 | declspecs_sc_nots_sa_noea typespec_nonattr
1185 { $$ = tree_cons (NULL_TREE, $2, $1);
1186 TREE_STATIC ($$) = 1; }
1187 | declspecs_sc_nots_sa_ea typespec_nonattr
1188 { $$ = tree_cons (NULL_TREE, $2, $1);
1189 TREE_STATIC ($$) = 1; }
1190 | declspecs_nosc_ts_sa_noea SCSPEC
1191 { if (extra_warnings && TREE_STATIC ($1))
1192 warning ("`%s' is not at beginning of declaration",
1193 IDENTIFIER_POINTER ($2));
1194 $$ = tree_cons (NULL_TREE, $2, $1);
1195 TREE_STATIC ($$) = TREE_STATIC ($1); }
1196 | declspecs_nosc_ts_sa_ea SCSPEC
1197 { if (extra_warnings && TREE_STATIC ($1))
1198 warning ("`%s' is not at beginning of declaration",
1199 IDENTIFIER_POINTER ($2));
1200 $$ = tree_cons (NULL_TREE, $2, $1);
1201 TREE_STATIC ($$) = TREE_STATIC ($1); }
1202 | declspecs_sc_ts_sa_noea SCSPEC
1203 { if (extra_warnings && TREE_STATIC ($1))
1204 warning ("`%s' is not at beginning of declaration",
1205 IDENTIFIER_POINTER ($2));
1206 $$ = tree_cons (NULL_TREE, $2, $1);
1207 TREE_STATIC ($$) = TREE_STATIC ($1); }
1208 | declspecs_sc_ts_sa_ea SCSPEC
1209 { if (extra_warnings && TREE_STATIC ($1))
1210 warning ("`%s' is not at beginning of declaration",
1211 IDENTIFIER_POINTER ($2));
1212 $$ = tree_cons (NULL_TREE, $2, $1);
1213 TREE_STATIC ($$) = TREE_STATIC ($1); }
1214 ;
1216 declspecs_sc_ts_sa_ea:
1217 declspecs_sc_ts_sa_noea attributes
1218 { $$ = tree_cons ($2, NULL_TREE, $1);
1219 TREE_STATIC ($$) = TREE_STATIC ($1); }
1220 | declspecs_sc_ts_sa_noea typespec_reserved_attr
1221 { $$ = tree_cons (NULL_TREE, $2, $1);
1222 TREE_STATIC ($$) = 1; }
1223 | declspecs_sc_ts_sa_ea typespec_reserved_attr
1224 { $$ = tree_cons (NULL_TREE, $2, $1);
1225 TREE_STATIC ($$) = 1; }
1226 | declspecs_sc_nots_sa_noea typespec_attr
1227 { $$ = tree_cons (NULL_TREE, $2, $1);
1228 TREE_STATIC ($$) = 1; }
1229 | declspecs_sc_nots_sa_ea typespec_attr
1230 { $$ = tree_cons (NULL_TREE, $2, $1);
1231 TREE_STATIC ($$) = 1; }
1232 ;
1234 /* Particular useful classes of declspecs. */
1235 declspecs_ts:
1236 declspecs_nosc_ts_nosa_noea
1237 | declspecs_nosc_ts_nosa_ea
1238 | declspecs_nosc_ts_sa_noea
1239 | declspecs_nosc_ts_sa_ea
1240 | declspecs_sc_ts_nosa_noea
1241 | declspecs_sc_ts_nosa_ea
1242 | declspecs_sc_ts_sa_noea
1243 | declspecs_sc_ts_sa_ea
1244 ;
1246 declspecs_nots:
1247 declspecs_nosc_nots_nosa_noea
1248 | declspecs_nosc_nots_nosa_ea
1249 | declspecs_nosc_nots_sa_noea
1250 | declspecs_nosc_nots_sa_ea
1251 | declspecs_sc_nots_nosa_noea
1252 | declspecs_sc_nots_nosa_ea
1253 | declspecs_sc_nots_sa_noea
1254 | declspecs_sc_nots_sa_ea
1255 ;
1257 declspecs_ts_nosa:
1258 declspecs_nosc_ts_nosa_noea
1259 | declspecs_nosc_ts_nosa_ea
1260 | declspecs_sc_ts_nosa_noea
1261 | declspecs_sc_ts_nosa_ea
1262 ;
1264 declspecs_nots_nosa:
1265 declspecs_nosc_nots_nosa_noea
1266 | declspecs_nosc_nots_nosa_ea
1267 | declspecs_sc_nots_nosa_noea
1268 | declspecs_sc_nots_nosa_ea
1269 ;
1271 declspecs_nosc_ts:
1272 declspecs_nosc_ts_nosa_noea
1273 | declspecs_nosc_ts_nosa_ea
1274 | declspecs_nosc_ts_sa_noea
1275 | declspecs_nosc_ts_sa_ea
1276 ;
1278 declspecs_nosc_nots:
1279 declspecs_nosc_nots_nosa_noea
1280 | declspecs_nosc_nots_nosa_ea
1281 | declspecs_nosc_nots_sa_noea
1282 | declspecs_nosc_nots_sa_ea
1283 ;
1285 declspecs_nosc:
1286 declspecs_nosc_ts_nosa_noea
1287 | declspecs_nosc_ts_nosa_ea
1288 | declspecs_nosc_ts_sa_noea
1289 | declspecs_nosc_ts_sa_ea
1290 | declspecs_nosc_nots_nosa_noea
1291 | declspecs_nosc_nots_nosa_ea
1292 | declspecs_nosc_nots_sa_noea
1293 | declspecs_nosc_nots_sa_ea
1294 ;
1296 declspecs:
1297 declspecs_nosc_nots_nosa_noea
1298 | declspecs_nosc_nots_nosa_ea
1299 | declspecs_nosc_nots_sa_noea
1300 | declspecs_nosc_nots_sa_ea
1301 | declspecs_nosc_ts_nosa_noea
1302 | declspecs_nosc_ts_nosa_ea
1303 | declspecs_nosc_ts_sa_noea
1304 | declspecs_nosc_ts_sa_ea
1305 | declspecs_sc_nots_nosa_noea
1306 | declspecs_sc_nots_nosa_ea
1307 | declspecs_sc_nots_sa_noea
1308 | declspecs_sc_nots_sa_ea
1309 | declspecs_sc_ts_nosa_noea
1310 | declspecs_sc_ts_nosa_ea
1311 | declspecs_sc_ts_sa_noea
1312 | declspecs_sc_ts_sa_ea
1313 ;
1315 /* A (possibly empty) sequence of type qualifiers and attributes. */
1316 maybe_type_quals_attrs:
1317 /* empty */
1318 { $$ = NULL_TREE; }
1319 | declspecs_nosc_nots
1320 { $$ = $1; }
1321 ;
1323 /* A type specifier (but not a type qualifier).
1324 Once we have seen one of these in a declaration,
1325 if a typedef name appears then it is being redeclared.
1327 The _reserved versions start with a reserved word and may appear anywhere
1328 in the declaration specifiers; the _nonreserved versions may only
1329 appear before any other type specifiers, and after that are (if names)
1330 being redeclared.
1332 FIXME: should the _nonreserved version be restricted to names being
1333 redeclared only? The other entries there relate only the GNU extensions
1334 and Objective C, and are historically parsed thus, and don't make sense
1335 after other type specifiers, but it might be cleaner to count them as
1336 _reserved.
1338 _attr means: specifiers that either end with attributes,
1339 or are such that any following attributes would
1340 be parsed as part of the specifier.
1342 _nonattr: specifiers. */
1344 typespec_nonattr:
1345 typespec_reserved_nonattr
1346 | typespec_nonreserved_nonattr
1347 ;
1349 typespec_attr:
1350 typespec_reserved_attr
1351 ;
1353 typespec_reserved_nonattr:
1354 TYPESPEC
1355 { OBJC_NEED_RAW_IDENTIFIER (1); }
1356 | structsp_nonattr
1357 ;
1359 typespec_reserved_attr:
1360 structsp_attr
1361 ;
1363 typespec_nonreserved_nonattr:
1364 TYPENAME
1365 { /* For a typedef name, record the meaning, not the name.
1366 In case of `foo foo, bar;'. */
1367 $$ = lookup_name ($1); }
1368 ifobjc
1369 | CLASSNAME protocolrefs
1370 { $$ = get_static_reference ($1, $2); }
1371 | OBJECTNAME protocolrefs
1372 { $$ = get_object_reference ($2); }
1374 /* Make "<SomeProtocol>" equivalent to "id <SomeProtocol>"
1375 - nisse@lysator.liu.se */
1376 | non_empty_protocolrefs
1377 { $$ = get_object_reference ($1); }
1378 end ifobjc
1379 | TYPEOF '(' expr ')'
1380 { $$ = TREE_TYPE ($3); }
1381 | TYPEOF '(' typename ')'
1382 { $$ = groktypename ($3); }
1383 ;
1385 /* typespec_nonreserved_attr does not exist. */
1387 initdecls:
1388 initdcl
1389 | initdecls ',' maybe_resetattrs initdcl
1390 ;
1392 notype_initdecls:
1393 notype_initdcl
1394 | notype_initdecls ',' maybe_resetattrs notype_initdcl
1395 ;
1397 maybeasm:
1398 /* empty */
1399 { $$ = NULL_TREE; }
1400 | ASM_KEYWORD '(' string ')'
1401 { if (TREE_CHAIN ($3)) $3 = combine_strings ($3);
1402 $$ = $3;
1403 }
1404 ;
1406 initdcl:
1407 declarator maybeasm maybe_attribute '='
1408 { $<ttype>$ = start_decl ($1, current_declspecs, 1,
1409 chainon ($3, all_prefix_attributes));
1410 start_init ($<ttype>$, $2, global_bindings_p ()); }
1411 init
1412 /* Note how the declaration of the variable is in effect while its init is parsed! */
1413 { finish_init ();
1414 finish_decl ($<ttype>5, $6, $2); }
1415 | declarator maybeasm maybe_attribute
1416 { tree d = start_decl ($1, current_declspecs, 0,
1417 chainon ($3, all_prefix_attributes));
1418 finish_decl (d, NULL_TREE, $2);
1419 }
1420 ;
1422 notype_initdcl:
1423 notype_declarator maybeasm maybe_attribute '='
1424 { $<ttype>$ = start_decl ($1, current_declspecs, 1,
1425 chainon ($3, all_prefix_attributes));
1426 start_init ($<ttype>$, $2, global_bindings_p ()); }
1427 init
1428 /* Note how the declaration of the variable is in effect while its init is parsed! */
1429 { finish_init ();
1430 finish_decl ($<ttype>5, $6, $2); }
1431 | notype_declarator maybeasm maybe_attribute
1432 { tree d = start_decl ($1, current_declspecs, 0,
1433 chainon ($3, all_prefix_attributes));
1434 finish_decl (d, NULL_TREE, $2); }
1435 ;
1436 /* the * rules are dummies to accept the Apollo extended syntax
1437 so that the header files compile. */
1438 maybe_attribute:
1439 /* empty */
1440 { $$ = NULL_TREE; }
1441 | attributes
1442 { $$ = $1; }
1443 ;
1445 attributes:
1446 attribute
1447 { $$ = $1; }
1448 | attributes attribute
1449 { $$ = chainon ($1, $2); }
1450 ;
1452 attribute:
1453 ATTRIBUTE '(' '(' attribute_list ')' ')'
1454 { $$ = $4; }
1455 ;
1457 attribute_list:
1458 attrib
1459 { $$ = $1; }
1460 | attribute_list ',' attrib
1461 { $$ = chainon ($1, $3); }
1462 ;
1464 attrib:
1465 /* empty */
1466 { $$ = NULL_TREE; }
1467 | any_word
1468 { $$ = build_tree_list ($1, NULL_TREE); }
1469 | any_word '(' IDENTIFIER ')'
1470 { $$ = build_tree_list ($1, build_tree_list (NULL_TREE, $3)); }
1471 | any_word '(' IDENTIFIER ',' nonnull_exprlist ')'
1472 { $$ = build_tree_list ($1, tree_cons (NULL_TREE, $3, $5)); }
1473 | any_word '(' exprlist ')'
1474 { $$ = build_tree_list ($1, $3); }
1475 ;
1477 /* This still leaves out most reserved keywords,
1478 shouldn't we include them? */
1480 any_word:
1481 identifier
1482 | SCSPEC
1483 | TYPESPEC
1484 | TYPE_QUAL
1485 ;
1486 \f
1487 /* Initializers. `init' is the entry point. */
1489 init:
1490 expr_no_commas
1491 | '{'
1492 { really_start_incremental_init (NULL_TREE); }
1493 initlist_maybe_comma '}'
1494 { $$ = pop_init_level (0); }
1495 | error
1496 { $$ = error_mark_node; }
1497 ;
1499 /* `initlist_maybe_comma' is the guts of an initializer in braces. */
1500 initlist_maybe_comma:
1501 /* empty */
1502 { if (pedantic)
1503 pedwarn ("ISO C forbids empty initializer braces"); }
1504 | initlist1 maybecomma
1505 ;
1507 initlist1:
1508 initelt
1509 | initlist1 ',' initelt
1510 ;
1512 /* `initelt' is a single element of an initializer.
1513 It may use braces. */
1514 initelt:
1515 designator_list '=' initval
1516 { if (pedantic && ! flag_isoc99)
1517 pedwarn ("ISO C89 forbids specifying subobject to initialize"); }
1518 | designator initval
1519 { if (pedantic)
1520 pedwarn ("obsolete use of designated initializer without `='"); }
1521 | identifier ':'
1522 { set_init_label ($1);
1523 if (pedantic)
1524 pedwarn ("obsolete use of designated initializer with `:'"); }
1525 initval
1526 | initval
1527 ;
1529 initval:
1530 '{'
1531 { push_init_level (0); }
1532 initlist_maybe_comma '}'
1533 { process_init_element (pop_init_level (0)); }
1534 | expr_no_commas
1535 { process_init_element ($1); }
1536 | error
1537 ;
1539 designator_list:
1540 designator
1541 | designator_list designator
1542 ;
1544 designator:
1545 '.' identifier
1546 { set_init_label ($2); }
1547 /* These are for labeled elements. The syntax for an array element
1548 initializer conflicts with the syntax for an Objective-C message,
1549 so don't include these productions in the Objective-C grammar. */
1550 ifc
1551 | '[' expr_no_commas ELLIPSIS expr_no_commas ']'
1552 { set_init_index ($2, $4);
1553 if (pedantic)
1554 pedwarn ("ISO C forbids specifying range of elements to initialize"); }
1555 | '[' expr_no_commas ']'
1556 { set_init_index ($2, NULL_TREE); }
1557 end ifc
1558 ;
1559 \f
1560 nested_function:
1561 declarator
1562 { if (pedantic)
1563 pedwarn ("ISO C forbids nested functions");
1565 push_function_context ();
1566 if (! start_function (current_declspecs, $1,
1567 all_prefix_attributes))
1568 {
1569 pop_function_context ();
1570 YYERROR1;
1571 }
1572 }
1573 old_style_parm_decls
1574 { store_parm_decls (); }
1575 /* This used to use compstmt_or_error.
1576 That caused a bug with input `f(g) int g {}',
1577 where the use of YYERROR1 above caused an error
1578 which then was handled by compstmt_or_error.
1579 There followed a repeated execution of that same rule,
1580 which called YYERROR1 again, and so on. */
1581 save_filename save_lineno compstmt
1582 { tree decl = current_function_decl;
1583 DECL_SOURCE_FILE (decl) = $5;
1584 DECL_SOURCE_LINE (decl) = $6;
1585 finish_function (1);
1586 pop_function_context ();
1587 add_decl_stmt (decl); }
1588 ;
1590 notype_nested_function:
1591 notype_declarator
1592 { if (pedantic)
1593 pedwarn ("ISO C forbids nested functions");
1595 push_function_context ();
1596 if (! start_function (current_declspecs, $1,
1597 all_prefix_attributes))
1598 {
1599 pop_function_context ();
1600 YYERROR1;
1601 }
1602 }
1603 old_style_parm_decls
1604 { store_parm_decls (); }
1605 /* This used to use compstmt_or_error.
1606 That caused a bug with input `f(g) int g {}',
1607 where the use of YYERROR1 above caused an error
1608 which then was handled by compstmt_or_error.
1609 There followed a repeated execution of that same rule,
1610 which called YYERROR1 again, and so on. */
1611 save_filename save_lineno compstmt
1612 { tree decl = current_function_decl;
1613 DECL_SOURCE_FILE (decl) = $5;
1614 DECL_SOURCE_LINE (decl) = $6;
1615 finish_function (1);
1616 pop_function_context ();
1617 add_decl_stmt (decl); }
1618 ;
1620 /* Any kind of declarator (thus, all declarators allowed
1621 after an explicit typespec). */
1623 declarator:
1624 after_type_declarator
1625 | notype_declarator
1626 ;
1628 /* A declarator that is allowed only after an explicit typespec. */
1630 after_type_declarator:
1631 '(' maybe_attribute after_type_declarator ')'
1632 { $$ = $2 ? tree_cons ($2, $3, NULL_TREE) : $3; }
1633 | after_type_declarator '(' parmlist_or_identifiers %prec '.'
1634 { $$ = build_nt (CALL_EXPR, $1, $3, NULL_TREE); }
1635 /* | after_type_declarator '(' error ')' %prec '.'
1636 { $$ = build_nt (CALL_EXPR, $1, NULL_TREE, NULL_TREE);
1637 poplevel (0, 0, 0); } */
1638 | after_type_declarator array_declarator %prec '.'
1639 { $$ = set_array_declarator_type ($2, $1, 0); }
1640 | '*' maybe_type_quals_attrs after_type_declarator %prec UNARY
1641 { $$ = make_pointer_declarator ($2, $3); }
1642 | TYPENAME
1643 ifobjc
1644 | OBJECTNAME
1645 end ifobjc
1646 ;
1648 /* Kinds of declarator that can appear in a parameter list
1649 in addition to notype_declarator. This is like after_type_declarator
1650 but does not allow a typedef name in parentheses as an identifier
1651 (because it would conflict with a function with that typedef as arg). */
1652 parm_declarator:
1653 parm_declarator_starttypename
1654 | parm_declarator_nostarttypename
1655 ;
1657 parm_declarator_starttypename:
1658 parm_declarator_starttypename '(' parmlist_or_identifiers %prec '.'
1659 { $$ = build_nt (CALL_EXPR, $1, $3, NULL_TREE); }
1660 /* | parm_declarator_starttypename '(' error ')' %prec '.'
1661 { $$ = build_nt (CALL_EXPR, $1, NULL_TREE, NULL_TREE);
1662 poplevel (0, 0, 0); } */
1663 | parm_declarator_starttypename array_declarator %prec '.'
1664 { $$ = set_array_declarator_type ($2, $1, 0); }
1665 | TYPENAME
1666 ifobjc
1667 | OBJECTNAME
1668 end ifobjc
1669 ;
1671 parm_declarator_nostarttypename:
1672 parm_declarator_nostarttypename '(' parmlist_or_identifiers %prec '.'
1673 { $$ = build_nt (CALL_EXPR, $1, $3, NULL_TREE); }
1674 /* | parm_declarator_nostarttypename '(' error ')' %prec '.'
1675 { $$ = build_nt (CALL_EXPR, $1, NULL_TREE, NULL_TREE);
1676 poplevel (0, 0, 0); } */
1677 | parm_declarator_nostarttypename array_declarator %prec '.'
1678 { $$ = set_array_declarator_type ($2, $1, 0); }
1679 | '*' maybe_type_quals_attrs parm_declarator_starttypename %prec UNARY
1680 { $$ = make_pointer_declarator ($2, $3); }
1681 | '*' maybe_type_quals_attrs parm_declarator_nostarttypename %prec UNARY
1682 { $$ = make_pointer_declarator ($2, $3); }
1683 | '(' maybe_attribute parm_declarator_nostarttypename ')'
1684 { $$ = $2 ? tree_cons ($2, $3, NULL_TREE) : $3; }
1685 ;
1687 /* A declarator allowed whether or not there has been
1688 an explicit typespec. These cannot redeclare a typedef-name. */
1690 notype_declarator:
1691 notype_declarator '(' parmlist_or_identifiers %prec '.'
1692 { $$ = build_nt (CALL_EXPR, $1, $3, NULL_TREE); }
1693 /* | notype_declarator '(' error ')' %prec '.'
1694 { $$ = build_nt (CALL_EXPR, $1, NULL_TREE, NULL_TREE);
1695 poplevel (0, 0, 0); } */
1696 | '(' maybe_attribute notype_declarator ')'
1697 { $$ = $2 ? tree_cons ($2, $3, NULL_TREE) : $3; }
1698 | '*' maybe_type_quals_attrs notype_declarator %prec UNARY
1699 { $$ = make_pointer_declarator ($2, $3); }
1700 | notype_declarator array_declarator %prec '.'
1701 { $$ = set_array_declarator_type ($2, $1, 0); }
1702 | IDENTIFIER
1703 ;
1705 struct_head:
1706 STRUCT
1707 { $$ = NULL_TREE; }
1708 | STRUCT attributes
1709 { $$ = $2; }
1710 ;
1712 union_head:
1713 UNION
1714 { $$ = NULL_TREE; }
1715 | UNION attributes
1716 { $$ = $2; }
1717 ;
1719 enum_head:
1720 ENUM
1721 { $$ = NULL_TREE; }
1722 | ENUM attributes
1723 { $$ = $2; }
1724 ;
1726 /* structsp_attr: struct/union/enum specifiers that either
1727 end with attributes, or are such that any following attributes would
1728 be parsed as part of the struct/union/enum specifier.
1730 structsp_nonattr: other struct/union/enum specifiers. */
1732 structsp_attr:
1733 struct_head identifier '{'
1734 { $$ = start_struct (RECORD_TYPE, $2);
1735 /* Start scope of tag before parsing components. */
1736 }
1737 component_decl_list '}' maybe_attribute
1738 { $$ = finish_struct ($<ttype>4, $5, chainon ($1, $7)); }
1739 | struct_head '{' component_decl_list '}' maybe_attribute
1740 { $$ = finish_struct (start_struct (RECORD_TYPE, NULL_TREE),
1741 $3, chainon ($1, $5));
1742 }
1743 | union_head identifier '{'
1744 { $$ = start_struct (UNION_TYPE, $2); }
1745 component_decl_list '}' maybe_attribute
1746 { $$ = finish_struct ($<ttype>4, $5, chainon ($1, $7)); }
1747 | union_head '{' component_decl_list '}' maybe_attribute
1748 { $$ = finish_struct (start_struct (UNION_TYPE, NULL_TREE),
1749 $3, chainon ($1, $5));
1750 }
1751 | enum_head identifier '{'
1752 { $$ = start_enum ($2); }
1753 enumlist maybecomma_warn '}' maybe_attribute
1754 { $$ = finish_enum ($<ttype>4, nreverse ($5),
1755 chainon ($1, $8)); }
1756 | enum_head '{'
1757 { $$ = start_enum (NULL_TREE); }
1758 enumlist maybecomma_warn '}' maybe_attribute
1759 { $$ = finish_enum ($<ttype>3, nreverse ($4),
1760 chainon ($1, $7)); }
1761 ;
1763 structsp_nonattr:
1764 struct_head identifier
1765 { $$ = xref_tag (RECORD_TYPE, $2); }
1766 | union_head identifier
1767 { $$ = xref_tag (UNION_TYPE, $2); }
1768 | enum_head identifier
1769 { $$ = xref_tag (ENUMERAL_TYPE, $2);
1770 /* In ISO C, enumerated types can be referred to
1771 only if already defined. */
1772 if (pedantic && !COMPLETE_TYPE_P ($$))
1773 pedwarn ("ISO C forbids forward references to `enum' types"); }
1774 ;
1776 maybecomma:
1777 /* empty */
1778 | ','
1779 ;
1781 maybecomma_warn:
1782 /* empty */
1783 | ','
1784 { if (pedantic && ! flag_isoc99)
1785 pedwarn ("comma at end of enumerator list"); }
1786 ;
1788 component_decl_list:
1789 component_decl_list2
1790 { $$ = $1; }
1791 | component_decl_list2 component_decl
1792 { $$ = chainon ($1, $2);
1793 pedwarn ("no semicolon at end of struct or union"); }
1794 ;
1796 component_decl_list2: /* empty */
1797 { $$ = NULL_TREE; }
1798 | component_decl_list2 component_decl ';'
1799 { $$ = chainon ($1, $2); }
1800 | component_decl_list2 ';'
1801 { if (pedantic)
1802 pedwarn ("extra semicolon in struct or union specified"); }
1803 ifobjc
1804 /* foo(sizeof(struct{ @defs(ClassName)})); */
1805 | DEFS '(' CLASSNAME ')'
1806 {
1807 tree interface = lookup_interface ($3);
1809 if (interface)
1810 $$ = get_class_ivars (interface);
1811 else
1812 {
1813 error ("cannot find interface declaration for `%s'",
1814 IDENTIFIER_POINTER ($3));
1815 $$ = NULL_TREE;
1816 }
1817 }
1818 end ifobjc
1819 ;
1821 component_decl:
1822 declspecs_nosc_ts setspecs components
1823 { $$ = $3;
1824 POP_DECLSPEC_STACK; }
1825 | declspecs_nosc_ts setspecs save_filename save_lineno
1826 {
1827 /* Support for unnamed structs or unions as members of
1828 structs or unions (which is [a] useful and [b] supports
1829 MS P-SDK). */
1830 if (pedantic)
1831 pedwarn ("ISO C doesn't support unnamed structs/unions");
1833 $$ = grokfield($3, $4, NULL, current_declspecs, NULL_TREE);
1834 POP_DECLSPEC_STACK; }
1835 | declspecs_nosc_nots setspecs components_notype
1836 { $$ = $3;
1837 POP_DECLSPEC_STACK; }
1838 | declspecs_nosc_nots
1839 { if (pedantic)
1840 pedwarn ("ISO C forbids member declarations with no members");
1841 shadow_tag($1);
1842 $$ = NULL_TREE; }
1843 | error
1844 { $$ = NULL_TREE; }
1845 | extension component_decl
1846 { $$ = $2;
1847 RESTORE_WARN_FLAGS ($1); }
1848 ;
1850 components:
1851 component_declarator
1852 | components ',' maybe_resetattrs component_declarator
1853 { $$ = chainon ($1, $4); }
1854 ;
1856 components_notype:
1857 component_notype_declarator
1858 | components_notype ',' maybe_resetattrs component_notype_declarator
1859 { $$ = chainon ($1, $4); }
1860 ;
1862 component_declarator:
1863 save_filename save_lineno declarator maybe_attribute
1864 { $$ = grokfield ($1, $2, $3, current_declspecs, NULL_TREE);
1865 decl_attributes (&$$, chainon ($4, all_prefix_attributes), 0); }
1866 | save_filename save_lineno
1867 declarator ':' expr_no_commas maybe_attribute
1868 { $$ = grokfield ($1, $2, $3, current_declspecs, $5);
1869 decl_attributes (&$$, chainon ($6, all_prefix_attributes), 0); }
1870 | save_filename save_lineno ':' expr_no_commas maybe_attribute
1871 { $$ = grokfield ($1, $2, NULL_TREE, current_declspecs, $4);
1872 decl_attributes (&$$, chainon ($5, all_prefix_attributes), 0); }
1873 ;
1875 component_notype_declarator:
1876 save_filename save_lineno notype_declarator maybe_attribute
1877 { $$ = grokfield ($1, $2, $3, current_declspecs, NULL_TREE);
1878 decl_attributes (&$$, chainon ($4, all_prefix_attributes), 0); }
1879 | save_filename save_lineno
1880 notype_declarator ':' expr_no_commas maybe_attribute
1881 { $$ = grokfield ($1, $2, $3, current_declspecs, $5);
1882 decl_attributes (&$$, chainon ($6, all_prefix_attributes), 0); }
1883 | save_filename save_lineno ':' expr_no_commas maybe_attribute
1884 { $$ = grokfield ($1, $2, NULL_TREE, current_declspecs, $4);
1885 decl_attributes (&$$, chainon ($5, all_prefix_attributes), 0); }
1886 ;
1888 /* We chain the enumerators in reverse order.
1889 They are put in forward order where enumlist is used.
1890 (The order used to be significant, but no longer is so.
1891 However, we still maintain the order, just to be clean.) */
1893 enumlist:
1894 enumerator
1895 | enumlist ',' enumerator
1896 { if ($1 == error_mark_node)
1897 $$ = $1;
1898 else
1899 $$ = chainon ($3, $1); }
1900 | error
1901 { $$ = error_mark_node; }
1902 ;
1905 enumerator:
1906 identifier
1907 { $$ = build_enumerator ($1, NULL_TREE); }
1908 | identifier '=' expr_no_commas
1909 { $$ = build_enumerator ($1, $3); }
1910 ;
1912 typename:
1913 declspecs_nosc
1914 { pending_xref_error ();
1915 $<ttype>$ = $1; }
1916 absdcl
1917 { $$ = build_tree_list ($<ttype>2, $3); }
1918 ;
1920 absdcl: /* an absolute declarator */
1921 /* empty */
1922 { $$ = NULL_TREE; }
1923 | absdcl1
1924 ;
1926 absdcl_maybe_attribute: /* absdcl maybe_attribute, but not just attributes */
1927 /* empty */
1928 { $$ = build_tree_list (build_tree_list (current_declspecs,
1929 NULL_TREE),
1930 all_prefix_attributes); }
1931 | absdcl1
1932 { $$ = build_tree_list (build_tree_list (current_declspecs,
1933 $1),
1934 all_prefix_attributes); }
1935 | absdcl1_noea attributes
1936 { $$ = build_tree_list (build_tree_list (current_declspecs,
1937 $1),
1938 chainon ($2, all_prefix_attributes)); }
1939 ;
1941 absdcl1: /* a nonempty absolute declarator */
1942 absdcl1_ea
1943 | absdcl1_noea
1944 ;
1946 absdcl1_noea:
1947 direct_absdcl1
1948 | '*' maybe_type_quals_attrs absdcl1_noea
1949 { $$ = make_pointer_declarator ($2, $3); }
1950 ;
1952 absdcl1_ea:
1953 '*' maybe_type_quals_attrs
1954 { $$ = make_pointer_declarator ($2, NULL_TREE); }
1955 | '*' maybe_type_quals_attrs absdcl1_ea
1956 { $$ = make_pointer_declarator ($2, $3); }
1957 ;
1959 direct_absdcl1:
1960 '(' maybe_attribute absdcl1 ')'
1961 { $$ = $2 ? tree_cons ($2, $3, NULL_TREE) : $3; }
1962 | direct_absdcl1 '(' parmlist
1963 { $$ = build_nt (CALL_EXPR, $1, $3, NULL_TREE); }
1964 | direct_absdcl1 array_declarator
1965 { $$ = set_array_declarator_type ($2, $1, 1); }
1966 | '(' parmlist
1967 { $$ = build_nt (CALL_EXPR, NULL_TREE, $2, NULL_TREE); }
1968 | array_declarator
1969 { $$ = set_array_declarator_type ($1, NULL_TREE, 1); }
1970 ;
1972 /* The [...] part of a declarator for an array type. */
1974 array_declarator:
1975 '[' expr ']'
1976 { $$ = build_array_declarator ($2, NULL_TREE, 0, 0); }
1977 | '[' declspecs_nosc expr ']'
1978 { $$ = build_array_declarator ($3, $2, 0, 0); }
1979 | '[' ']'
1980 { $$ = build_array_declarator (NULL_TREE, NULL_TREE, 0, 0); }
1981 | '[' declspecs_nosc ']'
1982 { $$ = build_array_declarator (NULL_TREE, $2, 0, 0); }
1983 | '[' '*' ']'
1984 { $$ = build_array_declarator (NULL_TREE, NULL_TREE, 0, 1); }
1985 | '[' declspecs_nosc '*' ']'
1986 { $$ = build_array_declarator (NULL_TREE, $2, 0, 1); }
1987 | '[' SCSPEC expr ']'
1988 { if (C_RID_CODE ($2) != RID_STATIC)
1989 error ("storage class specifier in array declarator");
1990 $$ = build_array_declarator ($3, NULL_TREE, 1, 0); }
1991 | '[' SCSPEC declspecs_nosc expr ']'
1992 { if (C_RID_CODE ($2) != RID_STATIC)
1993 error ("storage class specifier in array declarator");
1994 $$ = build_array_declarator ($4, $3, 1, 0); }
1995 | '[' declspecs_nosc SCSPEC expr ']'
1996 { if (C_RID_CODE ($3) != RID_STATIC)
1997 error ("storage class specifier in array declarator");
1998 $$ = build_array_declarator ($4, $2, 1, 0); }
1999 ;
2001 /* A nonempty series of declarations and statements (possibly followed by
2002 some labels) that can form the body of a compound statement.
2003 NOTE: we don't allow labels on declarations; this might seem like a
2004 natural extension, but there would be a conflict between attributes
2005 on the label and prefix attributes on the declaration. */
2007 stmts_and_decls:
2008 lineno_stmt_decl_or_labels_ending_stmt
2009 | lineno_stmt_decl_or_labels_ending_decl
2010 | lineno_stmt_decl_or_labels_ending_label
2011 {
2012 pedwarn ("deprecated use of label at end of compound statement");
2013 }
2014 | lineno_stmt_decl_or_labels_ending_error
2015 ;
2017 lineno_stmt_decl_or_labels_ending_stmt:
2018 lineno_stmt
2019 | lineno_stmt_decl_or_labels_ending_stmt lineno_stmt
2020 | lineno_stmt_decl_or_labels_ending_decl lineno_stmt
2021 | lineno_stmt_decl_or_labels_ending_label lineno_stmt
2022 | lineno_stmt_decl_or_labels_ending_error lineno_stmt
2023 ;
2025 lineno_stmt_decl_or_labels_ending_decl:
2026 lineno_decl
2027 | lineno_stmt_decl_or_labels_ending_stmt lineno_decl
2028 { if (pedantic && !flag_isoc99)
2029 pedwarn ("ISO C89 forbids mixed declarations and code"); }
2030 | lineno_stmt_decl_or_labels_ending_decl lineno_decl
2031 | lineno_stmt_decl_or_labels_ending_error lineno_decl
2032 ;
2034 lineno_stmt_decl_or_labels_ending_label:
2035 lineno_label
2036 | lineno_stmt_decl_or_labels_ending_stmt lineno_label
2037 | lineno_stmt_decl_or_labels_ending_decl lineno_label
2038 | lineno_stmt_decl_or_labels_ending_label lineno_label
2039 | lineno_stmt_decl_or_labels_ending_error lineno_label
2040 ;
2042 lineno_stmt_decl_or_labels_ending_error:
2043 errstmt
2044 | lineno_stmt_decl_or_labels errstmt
2045 ;
2047 lineno_stmt_decl_or_labels:
2048 lineno_stmt_decl_or_labels_ending_stmt
2049 | lineno_stmt_decl_or_labels_ending_decl
2050 | lineno_stmt_decl_or_labels_ending_label
2051 | lineno_stmt_decl_or_labels_ending_error
2052 ;
2054 errstmt: error ';'
2055 ;
2057 pushlevel: /* empty */
2058 { pushlevel (0);
2059 clear_last_expr ();
2060 add_scope_stmt (/*begin_p=*/1, /*partial_p=*/0);
2061 ifobjc
2062 if (objc_method_context)
2063 add_objc_decls ();
2064 end ifobjc
2065 }
2066 ;
2068 poplevel: /* empty */
2069 { $$ = add_scope_stmt (/*begin_p=*/0, /*partial_p=*/0); }
2071 /* Start and end blocks created for the new scopes of C99. */
2072 c99_block_start: /* empty */
2073 { if (flag_isoc99)
2074 {
2075 $$ = c_begin_compound_stmt ();
2076 pushlevel (0);
2077 clear_last_expr ();
2078 add_scope_stmt (/*begin_p=*/1, /*partial_p=*/0);
2079 ifobjc
2080 if (objc_method_context)
2081 add_objc_decls ();
2082 end ifobjc
2083 }
2084 else
2085 $$ = NULL_TREE;
2086 }
2087 ;
2089 /* Productions using c99_block_start and c99_block_end will need to do what's
2090 in compstmt: RECHAIN_STMTS ($1, COMPOUND_BODY ($1)); $$ = $2; where
2091 $1 is the value of c99_block_start and $2 of c99_block_end. */
2092 c99_block_end: /* empty */
2093 { if (flag_isoc99)
2094 {
2095 tree scope_stmt = add_scope_stmt (/*begin_p=*/0, /*partial_p=*/0);
2096 $$ = poplevel (kept_level_p (), 0, 0);
2097 SCOPE_STMT_BLOCK (TREE_PURPOSE (scope_stmt))
2098 = SCOPE_STMT_BLOCK (TREE_VALUE (scope_stmt))
2099 = $$;
2100 }
2101 else
2102 $$ = NULL_TREE; }
2103 ;
2105 /* Read zero or more forward-declarations for labels
2106 that nested functions can jump to. */
2107 maybe_label_decls:
2108 /* empty */
2109 | label_decls
2110 { if (pedantic)
2111 pedwarn ("ISO C forbids label declarations"); }
2112 ;
2114 label_decls:
2115 label_decl
2116 | label_decls label_decl
2117 ;
2119 label_decl:
2120 LABEL identifiers_or_typenames ';'
2121 { tree link;
2122 for (link = $2; link; link = TREE_CHAIN (link))
2123 {
2124 tree label = shadow_label (TREE_VALUE (link));
2125 C_DECLARED_LABEL_FLAG (label) = 1;
2126 add_decl_stmt (label);
2127 }
2128 }
2129 ;
2131 /* This is the body of a function definition.
2132 It causes syntax errors to ignore to the next openbrace. */
2133 compstmt_or_error:
2134 compstmt
2135 {}
2136 | error compstmt
2137 ;
2139 compstmt_start: '{' { compstmt_count++;
2140 $$ = c_begin_compound_stmt (); }
2142 compstmt_nostart: '}'
2143 { $$ = convert (void_type_node, integer_zero_node); }
2144 | pushlevel maybe_label_decls compstmt_contents_nonempty '}' poplevel
2145 { $$ = poplevel (kept_level_p (), 1, 0);
2146 SCOPE_STMT_BLOCK (TREE_PURPOSE ($5))
2147 = SCOPE_STMT_BLOCK (TREE_VALUE ($5))
2148 = $$; }
2149 ;
2151 compstmt_contents_nonempty:
2152 stmts_and_decls
2153 | error
2154 ;
2156 compstmt_primary_start:
2157 '(' '{'
2158 { if (current_function_decl == 0)
2159 {
2160 error ("braced-group within expression allowed only inside a function");
2161 YYERROR;
2162 }
2163 /* We must force a BLOCK for this level
2164 so that, if it is not expanded later,
2165 there is a way to turn off the entire subtree of blocks
2166 that are contained in it. */
2167 keep_next_level ();
2168 push_label_level ();
2169 compstmt_count++;
2170 $$ = add_stmt (build_stmt (COMPOUND_STMT, last_tree));
2171 }
2173 compstmt: compstmt_start compstmt_nostart
2174 { RECHAIN_STMTS ($1, COMPOUND_BODY ($1));
2175 last_expr_type = NULL_TREE;
2176 $$ = $1; }
2177 ;
2179 /* Value is number of statements counted as of the closeparen. */
2180 simple_if:
2181 if_prefix c99_block_lineno_labeled_stmt
2182 { c_finish_then (); }
2183 /* Make sure c_expand_end_cond is run once
2184 for each call to c_expand_start_cond.
2185 Otherwise a crash is likely. */
2186 | if_prefix error
2187 ;
2189 if_prefix:
2190 /* We must build the IF_STMT node before parsing its
2191 condition so that STMT_LINENO refers to the line
2192 containing the "if", and not the line containing
2193 the close-parenthesis.
2195 c_begin_if_stmt returns the IF_STMT node, which
2196 we later pass to c_expand_start_cond to fill
2197 in the condition and other tidbits. */
2198 IF
2199 { $<ttype>$ = c_begin_if_stmt (); }
2200 '(' expr ')'
2201 { c_expand_start_cond (truthvalue_conversion ($4),
2202 compstmt_count,$<ttype>2);
2203 $<itype>$ = stmt_count;
2204 if_stmt_file = $<filename>-2;
2205 if_stmt_line = $<lineno>-1; }
2206 ;
2208 /* This is a subroutine of stmt.
2209 It is used twice, once for valid DO statements
2210 and once for catching errors in parsing the end test. */
2211 do_stmt_start:
2212 DO
2213 { stmt_count++;
2214 compstmt_count++;
2215 $<ttype>$
2216 = add_stmt (build_stmt (DO_STMT, NULL_TREE,
2217 NULL_TREE));
2218 /* In the event that a parse error prevents
2219 parsing the complete do-statement, set the
2220 condition now. Otherwise, we can get crashes at
2221 RTL-generation time. */
2222 DO_COND ($<ttype>$) = error_mark_node; }
2223 c99_block_lineno_labeled_stmt WHILE
2224 { $$ = $<ttype>2;
2225 RECHAIN_STMTS ($$, DO_BODY ($$)); }
2226 ;
2228 /* The forced readahead in here is because we might be at the end of a
2229 line, and the line and file won't be bumped until yylex absorbs the
2230 first token on the next line. */
2231 save_filename:
2232 { if (yychar == YYEMPTY)
2233 yychar = YYLEX;
2234 $$ = input_filename; }
2235 ;
2237 save_lineno:
2238 { if (yychar == YYEMPTY)
2239 yychar = YYLEX;
2240 $$ = lineno; }
2241 ;
2243 lineno_labeled_stmt:
2244 lineno_stmt
2245 | lineno_label lineno_labeled_stmt
2246 ;
2248 /* Like lineno_labeled_stmt, but a block in C99. */
2249 c99_block_lineno_labeled_stmt:
2250 c99_block_start lineno_labeled_stmt c99_block_end
2251 { if (flag_isoc99)
2252 RECHAIN_STMTS ($1, COMPOUND_BODY ($1)); }
2253 ;
2255 lineno_stmt:
2256 save_filename save_lineno stmt
2257 { if ($3)
2258 {
2259 STMT_LINENO ($3) = $2;
2260 /* ??? We currently have no way of recording
2261 the filename for a statement. This probably
2262 matters little in practice at the moment,
2263 but I suspect that problems will occur when
2264 doing inlining at the tree level. */
2265 }
2266 }
2267 ;
2269 lineno_label:
2270 save_filename save_lineno label
2271 { if ($3)
2272 {
2273 STMT_LINENO ($3) = $2;
2274 }
2275 }
2276 ;
2278 select_or_iter_stmt:
2279 simple_if ELSE
2280 { c_expand_start_else ();
2281 $<itype>1 = stmt_count; }
2282 c99_block_lineno_labeled_stmt
2283 { c_finish_else ();
2284 c_expand_end_cond ();
2285 if (extra_warnings && stmt_count == $<itype>1)
2286 warning ("empty body in an else-statement"); }
2287 | simple_if %prec IF
2288 { c_expand_end_cond ();
2289 /* This warning is here instead of in simple_if, because we
2290 do not want a warning if an empty if is followed by an
2291 else statement. Increment stmt_count so we don't
2292 give a second error if this is a nested `if'. */
2293 if (extra_warnings && stmt_count++ == $<itype>1)
2294 warning_with_file_and_line (if_stmt_file, if_stmt_line,
2295 "empty body in an if-statement"); }
2296 /* Make sure c_expand_end_cond is run once
2297 for each call to c_expand_start_cond.
2298 Otherwise a crash is likely. */
2299 | simple_if ELSE error
2300 { c_expand_end_cond (); }
2301 /* We must build the WHILE_STMT node before parsing its
2302 condition so that STMT_LINENO refers to the line
2303 containing the "while", and not the line containing
2304 the close-parenthesis.
2306 c_begin_while_stmt returns the WHILE_STMT node, which
2307 we later pass to c_finish_while_stmt_cond to fill
2308 in the condition and other tidbits. */
2309 | WHILE
2310 { stmt_count++;
2311 $<ttype>$ = c_begin_while_stmt (); }
2312 '(' expr ')'
2313 { $4 = truthvalue_conversion ($4);
2314 c_finish_while_stmt_cond (truthvalue_conversion ($4),
2315 $<ttype>2);
2316 $<ttype>$ = add_stmt ($<ttype>2); }
2317 c99_block_lineno_labeled_stmt
2318 { RECHAIN_STMTS ($<ttype>6, WHILE_BODY ($<ttype>6)); }
2319 | do_stmt_start
2320 '(' expr ')' ';'
2321 { DO_COND ($1) = truthvalue_conversion ($3); }
2322 | do_stmt_start error
2323 { }
2324 | FOR
2325 { $<ttype>$ = build_stmt (FOR_STMT, NULL_TREE, NULL_TREE,
2326 NULL_TREE, NULL_TREE);
2327 add_stmt ($<ttype>$); }
2328 '(' for_init_stmt
2329 { stmt_count++;
2330 RECHAIN_STMTS ($<ttype>2, FOR_INIT_STMT ($<ttype>2)); }
2331 xexpr ';'
2332 { if ($6)
2333 FOR_COND ($<ttype>2) = truthvalue_conversion ($6); }
2334 xexpr ')'
2335 { FOR_EXPR ($<ttype>2) = $9; }
2336 c99_block_lineno_labeled_stmt
2337 { RECHAIN_STMTS ($<ttype>2, FOR_BODY ($<ttype>2)); }
2338 | SWITCH '(' expr ')'
2339 { stmt_count++;
2340 $<ttype>$ = c_start_case ($3); }
2341 c99_block_lineno_labeled_stmt
2342 { c_finish_case (); }
2343 ;
2345 for_init_stmt:
2346 xexpr ';'
2347 { add_stmt (build_stmt (EXPR_STMT, $1)); }
2348 | decl
2349 { check_for_loop_decls (); }
2350 ;
2352 /* Parse a single real statement, not including any labels. */
2353 stmt:
2354 compstmt
2355 { stmt_count++; $$ = $1; }
2356 | expr ';'
2357 { stmt_count++;
2358 $$ = c_expand_expr_stmt ($1); }
2359 | c99_block_start select_or_iter_stmt c99_block_end
2360 { if (flag_isoc99)
2361 RECHAIN_STMTS ($1, COMPOUND_BODY ($1));
2362 $$ = NULL_TREE; }
2363 | BREAK ';'
2364 { stmt_count++;
2365 $$ = add_stmt (build_break_stmt ()); }
2366 | CONTINUE ';'
2367 { stmt_count++;
2368 $$ = add_stmt (build_continue_stmt ()); }
2369 | RETURN ';'
2370 { stmt_count++;
2371 $$ = c_expand_return (NULL_TREE); }
2372 | RETURN expr ';'
2373 { stmt_count++;
2374 $$ = c_expand_return ($2); }
2375 | ASM_KEYWORD maybe_type_qual '(' expr ')' ';'
2376 { stmt_count++;
2377 $$ = simple_asm_stmt ($4); }
2378 /* This is the case with just output operands. */
2379 | ASM_KEYWORD maybe_type_qual '(' expr ':' asm_operands ')' ';'
2380 { stmt_count++;
2381 $$ = build_asm_stmt ($2, $4, $6, NULL_TREE, NULL_TREE); }
2382 /* This is the case with input operands as well. */
2383 | ASM_KEYWORD maybe_type_qual '(' expr ':' asm_operands ':'
2384 asm_operands ')' ';'
2385 { stmt_count++;
2386 $$ = build_asm_stmt ($2, $4, $6, $8, NULL_TREE); }
2387 /* This is the case with clobbered registers as well. */
2388 | ASM_KEYWORD maybe_type_qual '(' expr ':' asm_operands ':'
2389 asm_operands ':' asm_clobbers ')' ';'
2390 { stmt_count++;
2391 $$ = build_asm_stmt ($2, $4, $6, $8, $10); }
2392 | GOTO identifier ';'
2393 { tree decl;
2394 stmt_count++;
2395 decl = lookup_label ($2);
2396 if (decl != 0)
2397 {
2398 TREE_USED (decl) = 1;
2399 $$ = add_stmt (build_stmt (GOTO_STMT, decl));
2400 }
2401 else
2402 $$ = NULL_TREE;
2403 }
2404 | GOTO '*' expr ';'
2405 { if (pedantic)
2406 pedwarn ("ISO C forbids `goto *expr;'");
2407 stmt_count++;
2408 $3 = convert (ptr_type_node, $3);
2409 $$ = add_stmt (build_stmt (GOTO_STMT, $3)); }
2410 | ';'
2411 { $$ = NULL_TREE; }
2412 ;
2414 /* Any kind of label, including jump labels and case labels.
2415 ANSI C accepts labels only before statements, but we allow them
2416 also at the end of a compound statement. */
2418 label: CASE expr_no_commas ':'
2419 { stmt_count++;
2420 $$ = do_case ($2, NULL_TREE); }
2421 | CASE expr_no_commas ELLIPSIS expr_no_commas ':'
2422 { stmt_count++;
2423 $$ = do_case ($2, $4); }
2424 | DEFAULT ':'
2425 { stmt_count++;
2426 $$ = do_case (NULL_TREE, NULL_TREE); }
2427 | identifier save_filename save_lineno ':' maybe_attribute
2428 { tree label = define_label ($2, $3, $1);
2429 stmt_count++;
2430 if (label)
2431 {
2432 decl_attributes (&label, $5, 0);
2433 $$ = add_stmt (build_stmt (LABEL_STMT, label));
2434 }
2435 else
2436 $$ = NULL_TREE;
2437 }
2438 ;
2440 /* Either a type-qualifier or nothing. First thing in an `asm' statement. */
2442 maybe_type_qual:
2443 /* empty */
2444 { emit_line_note (input_filename, lineno);
2445 $$ = NULL_TREE; }
2446 | TYPE_QUAL
2447 { emit_line_note (input_filename, lineno); }
2448 ;
2450 xexpr:
2451 /* empty */
2452 { $$ = NULL_TREE; }
2453 | expr
2454 ;
2456 /* These are the operands other than the first string and colon
2457 in asm ("addextend %2,%1": "=dm" (x), "0" (y), "g" (*x)) */
2458 asm_operands: /* empty */
2459 { $$ = NULL_TREE; }
2460 | nonnull_asm_operands
2461 ;
2463 nonnull_asm_operands:
2464 asm_operand
2465 | nonnull_asm_operands ',' asm_operand
2466 { $$ = chainon ($1, $3); }
2467 ;
2469 asm_operand:
2470 STRING '(' expr ')'
2471 { $$ = build_tree_list (build_tree_list (NULL_TREE, $1), $3); }
2472 | '[' identifier ']' STRING '(' expr ')'
2473 { $$ = build_tree_list (build_tree_list ($2, $4), $6); }
2474 ;
2476 asm_clobbers:
2477 string
2478 { $$ = tree_cons (NULL_TREE, combine_strings ($1), NULL_TREE); }
2479 | asm_clobbers ',' string
2480 { $$ = tree_cons (NULL_TREE, combine_strings ($3), $1); }
2481 ;
2482 \f
2483 /* This is what appears inside the parens in a function declarator.
2484 Its value is a list of ..._TYPE nodes. Attributes must appear here
2485 to avoid a conflict with their appearance after an open parenthesis
2486 in an abstract declarator, as in
2487 "void bar (int (__attribute__((__mode__(SI))) int foo));". */
2488 parmlist:
2489 maybe_attribute
2490 { pushlevel (0);
2491 clear_parm_order ();
2492 declare_parm_level (0); }
2493 parmlist_1
2494 { $$ = $3;
2495 parmlist_tags_warning ();
2496 poplevel (0, 0, 0); }
2497 ;
2499 parmlist_1:
2500 parmlist_2 ')'
2501 | parms ';'
2502 { tree parm;
2503 if (pedantic)
2504 pedwarn ("ISO C forbids forward parameter declarations");
2505 /* Mark the forward decls as such. */
2506 for (parm = getdecls (); parm; parm = TREE_CHAIN (parm))
2507 TREE_ASM_WRITTEN (parm) = 1;
2508 clear_parm_order (); }
2509 maybe_attribute
2510 { /* Dummy action so attributes are in known place
2511 on parser stack. */ }
2512 parmlist_1
2513 { $$ = $6; }
2514 | error ')'
2515 { $$ = tree_cons (NULL_TREE, NULL_TREE, NULL_TREE); }
2516 ;
2518 /* This is what appears inside the parens in a function declarator.
2519 Is value is represented in the format that grokdeclarator expects. */
2520 parmlist_2: /* empty */
2521 { $$ = get_parm_info (0); }
2522 | ELLIPSIS
2523 { $$ = get_parm_info (0);
2524 /* Gcc used to allow this as an extension. However, it does
2525 not work for all targets, and thus has been disabled.
2526 Also, since func (...) and func () are indistinguishable,
2527 it caused problems with the code in expand_builtin which
2528 tries to verify that BUILT_IN_NEXT_ARG is being used
2529 correctly. */
2530 error ("ISO C requires a named argument before `...'");
2531 }
2532 | parms
2533 { $$ = get_parm_info (1); }
2534 | parms ',' ELLIPSIS
2535 { $$ = get_parm_info (0); }
2536 ;
2538 parms:
2539 firstparm
2540 { push_parm_decl ($1); }
2541 | parms ',' parm
2542 { push_parm_decl ($3); }
2543 ;
2545 /* A single parameter declaration or parameter type name,
2546 as found in a parmlist. */
2547 parm:
2548 declspecs_ts setspecs parm_declarator maybe_attribute
2549 { $$ = build_tree_list (build_tree_list (current_declspecs,
2550 $3),
2551 chainon ($4, all_prefix_attributes));
2552 POP_DECLSPEC_STACK; }
2553 | declspecs_ts setspecs notype_declarator maybe_attribute
2554 { $$ = build_tree_list (build_tree_list (current_declspecs,
2555 $3),
2556 chainon ($4, all_prefix_attributes));
2557 POP_DECLSPEC_STACK; }
2558 | declspecs_ts setspecs absdcl_maybe_attribute
2559 { $$ = $3;
2560 POP_DECLSPEC_STACK; }
2561 | declspecs_nots setspecs notype_declarator maybe_attribute
2562 { $$ = build_tree_list (build_tree_list (current_declspecs,
2563 $3),
2564 chainon ($4, all_prefix_attributes));
2565 POP_DECLSPEC_STACK; }
2567 | declspecs_nots setspecs absdcl_maybe_attribute
2568 { $$ = $3;
2569 POP_DECLSPEC_STACK; }
2570 ;
2572 /* The first parm, which must suck attributes from off the top of the parser
2573 stack. */
2574 firstparm:
2575 declspecs_ts_nosa setspecs_fp parm_declarator maybe_attribute
2576 { $$ = build_tree_list (build_tree_list (current_declspecs,
2577 $3),
2578 chainon ($4, all_prefix_attributes));
2579 POP_DECLSPEC_STACK; }
2580 | declspecs_ts_nosa setspecs_fp notype_declarator maybe_attribute
2581 { $$ = build_tree_list (build_tree_list (current_declspecs,
2582 $3),
2583 chainon ($4, all_prefix_attributes));
2584 POP_DECLSPEC_STACK; }
2585 | declspecs_ts_nosa setspecs_fp absdcl_maybe_attribute
2586 { $$ = $3;
2587 POP_DECLSPEC_STACK; }
2588 | declspecs_nots_nosa setspecs_fp notype_declarator maybe_attribute
2589 { $$ = build_tree_list (build_tree_list (current_declspecs,
2590 $3),
2591 chainon ($4, all_prefix_attributes));
2592 POP_DECLSPEC_STACK; }
2594 | declspecs_nots_nosa setspecs_fp absdcl_maybe_attribute
2595 { $$ = $3;
2596 POP_DECLSPEC_STACK; }
2597 ;
2599 setspecs_fp:
2600 setspecs
2601 { prefix_attributes = chainon (prefix_attributes, $<ttype>-2);
2602 all_prefix_attributes = prefix_attributes; }
2603 ;
2605 /* This is used in a function definition
2606 where either a parmlist or an identifier list is ok.
2607 Its value is a list of ..._TYPE nodes or a list of identifiers. */
2608 parmlist_or_identifiers:
2609 maybe_attribute
2610 { pushlevel (0);
2611 clear_parm_order ();
2612 declare_parm_level (1); }
2613 parmlist_or_identifiers_1
2614 { $$ = $3;
2615 parmlist_tags_warning ();
2616 poplevel (0, 0, 0); }
2617 ;
2619 parmlist_or_identifiers_1:
2620 parmlist_1
2621 | identifiers ')'
2622 { tree t;
2623 for (t = $1; t; t = TREE_CHAIN (t))
2624 if (TREE_VALUE (t) == NULL_TREE)
2625 error ("`...' in old-style identifier list");
2626 $$ = tree_cons (NULL_TREE, NULL_TREE, $1);
2628 /* Make sure we have a parmlist after attributes. */
2629 if ($<ttype>-1 != 0
2630 && (TREE_CODE ($$) != TREE_LIST
2631 || TREE_PURPOSE ($$) == 0
2632 || TREE_CODE (TREE_PURPOSE ($$)) != PARM_DECL))
2633 YYERROR1;
2634 }
2635 ;
2637 /* A nonempty list of identifiers. */
2638 identifiers:
2639 IDENTIFIER
2640 { $$ = build_tree_list (NULL_TREE, $1); }
2641 | identifiers ',' IDENTIFIER
2642 { $$ = chainon ($1, build_tree_list (NULL_TREE, $3)); }
2643 ;
2645 /* A nonempty list of identifiers, including typenames. */
2646 identifiers_or_typenames:
2647 identifier
2648 { $$ = build_tree_list (NULL_TREE, $1); }
2649 | identifiers_or_typenames ',' identifier
2650 { $$ = chainon ($1, build_tree_list (NULL_TREE, $3)); }
2651 ;
2653 extension:
2654 EXTENSION
2655 { $$ = SAVE_WARN_FLAGS();
2656 pedantic = 0;
2657 warn_pointer_arith = 0;
2658 warn_traditional = 0; }
2659 ;
2660 \f
2661 ifobjc
2662 /* Objective-C productions. */
2664 objcdef:
2665 classdef
2666 | classdecl
2667 | aliasdecl
2668 | protocoldef
2669 | methoddef
2670 | END
2671 {
2672 if (objc_implementation_context)
2673 {
2674 finish_class (objc_implementation_context);
2675 objc_ivar_chain = NULL_TREE;
2676 objc_implementation_context = NULL_TREE;
2677 }
2678 else
2679 warning ("`@end' must appear in an implementation context");
2680 }
2681 ;
2683 /* A nonempty list of identifiers. */
2684 identifier_list:
2685 identifier
2686 { $$ = build_tree_list (NULL_TREE, $1); }
2687 | identifier_list ',' identifier
2688 { $$ = chainon ($1, build_tree_list (NULL_TREE, $3)); }
2689 ;
2691 classdecl:
2692 CLASS identifier_list ';'
2693 {
2694 objc_declare_class ($2);
2695 }
2697 aliasdecl:
2698 ALIAS identifier identifier ';'
2699 {
2700 objc_declare_alias ($2, $3);
2701 }
2703 classdef:
2704 INTERFACE identifier protocolrefs '{'
2705 {
2706 objc_interface_context = objc_ivar_context
2707 = start_class (CLASS_INTERFACE_TYPE, $2, NULL_TREE, $3);
2708 objc_public_flag = 0;
2709 }
2710 ivar_decl_list '}'
2711 {
2712 continue_class (objc_interface_context);
2713 }
2714 methodprotolist
2715 END
2716 {
2717 finish_class (objc_interface_context);
2718 objc_interface_context = NULL_TREE;
2719 }
2721 | INTERFACE identifier protocolrefs
2722 {
2723 objc_interface_context
2724 = start_class (CLASS_INTERFACE_TYPE, $2, NULL_TREE, $3);
2725 continue_class (objc_interface_context);
2726 }
2727 methodprotolist
2728 END
2729 {
2730 finish_class (objc_interface_context);
2731 objc_interface_context = NULL_TREE;
2732 }
2734 | INTERFACE identifier ':' identifier protocolrefs '{'
2735 {
2736 objc_interface_context = objc_ivar_context
2737 = start_class (CLASS_INTERFACE_TYPE, $2, $4, $5);
2738 objc_public_flag = 0;
2739 }
2740 ivar_decl_list '}'
2741 {
2742 continue_class (objc_interface_context);
2743 }
2744 methodprotolist
2745 END
2746 {
2747 finish_class (objc_interface_context);
2748 objc_interface_context = NULL_TREE;
2749 }
2751 | INTERFACE identifier ':' identifier protocolrefs
2752 {
2753 objc_interface_context
2754 = start_class (CLASS_INTERFACE_TYPE, $2, $4, $5);
2755 continue_class (objc_interface_context);
2756 }
2757 methodprotolist
2758 END
2759 {
2760 finish_class (objc_interface_context);
2761 objc_interface_context = NULL_TREE;
2762 }
2764 | IMPLEMENTATION identifier '{'
2765 {
2766 objc_implementation_context = objc_ivar_context
2767 = start_class (CLASS_IMPLEMENTATION_TYPE, $2, NULL_TREE, NULL_TREE);
2768 objc_public_flag = 0;
2769 }
2770 ivar_decl_list '}'
2771 {
2772 objc_ivar_chain
2773 = continue_class (objc_implementation_context);
2774 }
2776 | IMPLEMENTATION identifier
2777 {
2778 objc_implementation_context
2779 = start_class (CLASS_IMPLEMENTATION_TYPE, $2, NULL_TREE, NULL_TREE);
2780 objc_ivar_chain
2781 = continue_class (objc_implementation_context);
2782 }
2784 | IMPLEMENTATION identifier ':' identifier '{'
2785 {
2786 objc_implementation_context = objc_ivar_context
2787 = start_class (CLASS_IMPLEMENTATION_TYPE, $2, $4, NULL_TREE);
2788 objc_public_flag = 0;
2789 }
2790 ivar_decl_list '}'
2791 {
2792 objc_ivar_chain
2793 = continue_class (objc_implementation_context);
2794 }
2796 | IMPLEMENTATION identifier ':' identifier
2797 {
2798 objc_implementation_context
2799 = start_class (CLASS_IMPLEMENTATION_TYPE, $2, $4, NULL_TREE);
2800 objc_ivar_chain
2801 = continue_class (objc_implementation_context);
2802 }
2804 | INTERFACE identifier '(' identifier ')' protocolrefs
2805 {
2806 objc_interface_context
2807 = start_class (CATEGORY_INTERFACE_TYPE, $2, $4, $6);
2808 continue_class (objc_interface_context);
2809 }
2810 methodprotolist
2811 END
2812 {
2813 finish_class (objc_interface_context);
2814 objc_interface_context = NULL_TREE;
2815 }
2817 | IMPLEMENTATION identifier '(' identifier ')'
2818 {
2819 objc_implementation_context
2820 = start_class (CATEGORY_IMPLEMENTATION_TYPE, $2, $4, NULL_TREE);
2821 objc_ivar_chain
2822 = continue_class (objc_implementation_context);
2823 }
2824 ;
2826 protocoldef:
2827 PROTOCOL identifier protocolrefs
2828 {
2829 objc_pq_context = 1;
2830 objc_interface_context
2831 = start_protocol(PROTOCOL_INTERFACE_TYPE, $2, $3);
2832 }
2833 methodprotolist END
2834 {
2835 objc_pq_context = 0;
2836 finish_protocol(objc_interface_context);
2837 objc_interface_context = NULL_TREE;
2838 }
2839 /* The @protocol forward-declaration production introduces a
2840 reduce/reduce conflict on ';', which should be resolved in
2841 favor of the production 'identifier_list -> identifier'. */
2842 | PROTOCOL identifier_list ';'
2843 {
2844 objc_declare_protocols ($2);
2845 }
2846 ;
2848 protocolrefs:
2849 /* empty */
2850 {
2851 $$ = NULL_TREE;
2852 }
2853 | non_empty_protocolrefs
2854 ;
2856 non_empty_protocolrefs:
2857 ARITHCOMPARE identifier_list ARITHCOMPARE
2858 {
2859 if ($1 == LT_EXPR && $3 == GT_EXPR)
2860 $$ = $2;
2861 else
2862 YYERROR1;
2863 }
2864 ;
2866 ivar_decl_list:
2867 ivar_decl_list visibility_spec ivar_decls
2868 | ivar_decls
2869 ;
2871 visibility_spec:
2872 PRIVATE { objc_public_flag = 2; }
2873 | PROTECTED { objc_public_flag = 0; }
2874 | PUBLIC { objc_public_flag = 1; }
2875 ;
2877 ivar_decls:
2878 /* empty */
2879 {
2880 $$ = NULL_TREE;
2881 }
2882 | ivar_decls ivar_decl ';'
2883 | ivar_decls ';'
2884 {
2885 if (pedantic)
2886 pedwarn ("extra semicolon in struct or union specified");
2887 }
2888 ;
2891 /* There is a shift-reduce conflict here, because `components' may
2892 start with a `typename'. It happens that shifting (the default resolution)
2893 does the right thing, because it treats the `typename' as part of
2894 a `typed_typespecs'.
2896 It is possible that this same technique would allow the distinction
2897 between `notype_initdecls' and `initdecls' to be eliminated.
2898 But I am being cautious and not trying it. */
2900 ivar_decl:
2901 declspecs_nosc_ts setspecs ivars
2902 { $$ = $3;
2903 POP_DECLSPEC_STACK; }
2904 | declspecs_nosc_nots setspecs ivars
2905 { $$ = $3;
2906 POP_DECLSPEC_STACK; }
2907 | error
2908 { $$ = NULL_TREE; }
2909 ;
2911 ivars:
2912 /* empty */
2913 { $$ = NULL_TREE; }
2914 | ivar_declarator
2915 | ivars ',' maybe_resetattrs ivar_declarator
2916 ;
2918 ivar_declarator:
2919 declarator
2920 {
2921 $$ = add_instance_variable (objc_ivar_context,
2922 objc_public_flag,
2923 $1, current_declspecs,
2924 NULL_TREE);
2925 }
2926 | declarator ':' expr_no_commas
2927 {
2928 $$ = add_instance_variable (objc_ivar_context,
2929 objc_public_flag,
2930 $1, current_declspecs, $3);
2931 }
2932 | ':' expr_no_commas
2933 {
2934 $$ = add_instance_variable (objc_ivar_context,
2935 objc_public_flag,
2936 NULL_TREE,
2937 current_declspecs, $2);
2938 }
2939 ;
2941 methodtype:
2942 '+'
2943 { objc_inherit_code = CLASS_METHOD_DECL; }
2944 | '-'
2945 { objc_inherit_code = INSTANCE_METHOD_DECL; }
2946 ;
2948 methoddef:
2949 methodtype
2950 {
2951 objc_pq_context = 1;
2952 if (!objc_implementation_context)
2953 fatal_error ("method definition not in class context");
2954 }
2955 methoddecl
2956 {
2957 objc_pq_context = 0;
2958 if (objc_inherit_code == CLASS_METHOD_DECL)
2959 add_class_method (objc_implementation_context, $3);
2960 else
2961 add_instance_method (objc_implementation_context, $3);
2962 start_method_def ($3);
2963 }
2964 optarglist
2965 {
2966 continue_method_def ();
2967 }
2968 compstmt_or_error
2969 {
2970 finish_method_def ();
2971 }
2972 ;
2974 /* the reason for the strange actions in this rule
2975 is so that notype_initdecls when reached via datadef
2976 can find a valid list of type and sc specs in $0. */
2978 methodprotolist:
2979 /* empty */
2980 | {$<ttype>$ = NULL_TREE; } methodprotolist2
2981 ;
2983 methodprotolist2: /* eliminates a shift/reduce conflict */
2984 methodproto
2985 | datadef
2986 | methodprotolist2 methodproto
2987 | methodprotolist2 {$<ttype>$ = NULL_TREE; } datadef
2988 ;
2990 semi_or_error:
2991 ';'
2992 | error
2993 ;
2995 methodproto:
2996 methodtype
2997 {
2998 /* Remember protocol qualifiers in prototypes. */
2999 objc_pq_context = 1;
3000 }
3001 methoddecl
3002 {
3003 /* Forget protocol qualifiers here. */
3004 objc_pq_context = 0;
3005 if (objc_inherit_code == CLASS_METHOD_DECL)
3006 add_class_method (objc_interface_context, $3);
3007 else
3008 add_instance_method (objc_interface_context, $3);
3009 }
3010 semi_or_error
3011 ;
3013 methoddecl:
3014 '(' typename ')' unaryselector
3015 {
3016 $$ = build_method_decl (objc_inherit_code, $2, $4, NULL_TREE);
3017 }
3019 | unaryselector
3020 {
3021 $$ = build_method_decl (objc_inherit_code, NULL_TREE, $1, NULL_TREE);
3022 }
3024 | '(' typename ')' keywordselector optparmlist
3025 {
3026 $$ = build_method_decl (objc_inherit_code, $2, $4, $5);
3027 }
3029 | keywordselector optparmlist
3030 {
3031 $$ = build_method_decl (objc_inherit_code, NULL_TREE, $1, $2);
3032 }
3033 ;
3035 /* "optarglist" assumes that start_method_def has already been called...
3036 if it is not, the "xdecls" will not be placed in the proper scope */
3038 optarglist:
3039 /* empty */
3040 | ';' myxdecls
3041 ;
3043 /* to get around the following situation: "int foo (int a) int b; {}" that
3044 is synthesized when parsing "- a:a b:b; id c; id d; { ... }" */
3046 myxdecls:
3047 /* empty */
3048 | mydecls
3049 ;
3051 mydecls:
3052 mydecl
3053 | errstmt
3054 | mydecls mydecl
3055 | mydecl errstmt
3056 ;
3058 mydecl:
3059 declspecs_ts setspecs myparms ';'
3060 { POP_DECLSPEC_STACK; }
3061 | declspecs_ts ';'
3062 { shadow_tag ($1); }
3063 | declspecs_nots ';'
3064 { pedwarn ("empty declaration"); }
3065 ;
3067 myparms:
3068 myparm
3069 { push_parm_decl ($1); }
3070 | myparms ',' myparm
3071 { push_parm_decl ($3); }
3072 ;
3074 /* A single parameter declaration or parameter type name,
3075 as found in a parmlist. DOES NOT ALLOW AN INITIALIZER OR ASMSPEC */
3077 myparm:
3078 parm_declarator maybe_attribute
3079 { $$ = build_tree_list (build_tree_list (current_declspecs,
3080 $1),
3081 chainon ($2, all_prefix_attributes)); }
3082 | notype_declarator maybe_attribute
3083 { $$ = build_tree_list (build_tree_list (current_declspecs,
3084 $1),
3085 chainon ($2, all_prefix_attributes)); }
3086 | absdcl_maybe_attribute
3087 { $$ = $1; }
3088 ;
3090 optparmlist:
3091 /* empty */
3092 {
3093 $$ = NULL_TREE;
3094 }
3095 | ',' ELLIPSIS
3096 {
3097 /* oh what a kludge! */
3098 $$ = objc_ellipsis_node;
3099 }
3100 | ','
3101 {
3102 pushlevel (0);
3103 }
3104 parmlist_2
3105 {
3106 /* returns a tree list node generated by get_parm_info */
3107 $$ = $3;
3108 poplevel (0, 0, 0);
3109 }
3110 ;
3112 unaryselector:
3113 selector
3114 ;
3116 keywordselector:
3117 keyworddecl
3119 | keywordselector keyworddecl
3120 {
3121 $$ = chainon ($1, $2);
3122 }
3123 ;
3125 selector:
3126 IDENTIFIER
3127 | TYPENAME
3128 | CLASSNAME
3129 | OBJECTNAME
3130 | reservedwords
3131 ;
3133 reservedwords:
3134 ENUM | STRUCT | UNION | IF | ELSE | WHILE | DO | FOR
3135 | SWITCH | CASE | DEFAULT | BREAK | CONTINUE | RETURN
3136 | GOTO | ASM_KEYWORD | SIZEOF | TYPEOF | ALIGNOF
3137 | TYPESPEC | TYPE_QUAL
3138 ;
3140 keyworddecl:
3141 selector ':' '(' typename ')' identifier
3142 {
3143 $$ = build_keyword_decl ($1, $4, $6);
3144 }
3146 | selector ':' identifier
3147 {
3148 $$ = build_keyword_decl ($1, NULL_TREE, $3);
3149 }
3151 | ':' '(' typename ')' identifier
3152 {
3153 $$ = build_keyword_decl (NULL_TREE, $3, $5);
3154 }
3156 | ':' identifier
3157 {
3158 $$ = build_keyword_decl (NULL_TREE, NULL_TREE, $2);
3159 }
3160 ;
3162 messageargs:
3163 selector
3164 | keywordarglist
3165 ;
3167 keywordarglist:
3168 keywordarg
3169 | keywordarglist keywordarg
3170 {
3171 $$ = chainon ($1, $2);
3172 }
3173 ;
3176 keywordexpr:
3177 nonnull_exprlist
3178 {
3179 if (TREE_CHAIN ($1) == NULL_TREE)
3180 /* just return the expr., remove a level of indirection */
3181 $$ = TREE_VALUE ($1);
3182 else
3183 /* we have a comma expr., we will collapse later */
3184 $$ = $1;
3185 }
3186 ;
3188 keywordarg:
3189 selector ':' keywordexpr
3190 {
3191 $$ = build_tree_list ($1, $3);
3192 }
3193 | ':' keywordexpr
3194 {
3195 $$ = build_tree_list (NULL_TREE, $2);
3196 }
3197 ;
3199 receiver:
3200 expr
3201 | CLASSNAME
3202 {
3203 $$ = get_class_reference ($1);
3204 }
3205 ;
3207 objcmessageexpr:
3208 '['
3209 { objc_receiver_context = 1; }
3210 receiver
3211 { objc_receiver_context = 0; }
3212 messageargs ']'
3213 {
3214 $$ = build_tree_list ($3, $5);
3215 }
3216 ;
3218 selectorarg:
3219 selector
3220 | keywordnamelist
3221 ;
3223 keywordnamelist:
3224 keywordname
3225 | keywordnamelist keywordname
3226 {
3227 $$ = chainon ($1, $2);
3228 }
3229 ;
3231 keywordname:
3232 selector ':'
3233 {
3234 $$ = build_tree_list ($1, NULL_TREE);
3235 }
3236 | ':'
3237 {
3238 $$ = build_tree_list (NULL_TREE, NULL_TREE);
3239 }
3240 ;
3242 objcselectorexpr:
3243 SELECTOR '(' selectorarg ')'
3244 {
3245 $$ = $3;
3246 }
3247 ;
3249 objcprotocolexpr:
3250 PROTOCOL '(' identifier ')'
3251 {
3252 $$ = $3;
3253 }
3254 ;
3256 /* extension to support C-structures in the archiver */
3258 objcencodeexpr:
3259 ENCODE '(' typename ')'
3260 {
3261 $$ = groktypename ($3);
3262 }
3263 ;
3265 end ifobjc
3266 %%
3268 /* yylex() is a thin wrapper around c_lex(), all it does is translate
3269 cpplib.h's token codes into yacc's token codes. */
3271 static enum cpp_ttype last_token;
3273 /* The reserved keyword table. */
3274 struct resword
3275 {
3276 const char *word;
3277 ENUM_BITFIELD(rid) rid : 16;
3278 unsigned int disable : 16;
3279 };
3281 /* Disable mask. Keywords are disabled if (reswords[i].disable & mask) is
3282 _true_. */
3283 #define D_TRAD 0x01 /* not in traditional C */
3284 #define D_C89 0x02 /* not in C89 */
3285 #define D_EXT 0x04 /* GCC extension */
3286 #define D_EXT89 0x08 /* GCC extension incorporated in C99 */
3287 #define D_OBJC 0x10 /* Objective C only */
3289 static const struct resword reswords[] =
3290 {
3291 { "_Bool", RID_BOOL, 0 },
3292 { "_Complex", RID_COMPLEX, 0 },
3293 { "__FUNCTION__", RID_FUNCTION_NAME, 0 },
3294 { "__PRETTY_FUNCTION__", RID_PRETTY_FUNCTION_NAME, 0 },
3295 { "__alignof", RID_ALIGNOF, 0 },
3296 { "__alignof__", RID_ALIGNOF, 0 },
3297 { "__asm", RID_ASM, 0 },
3298 { "__asm__", RID_ASM, 0 },
3299 { "__attribute", RID_ATTRIBUTE, 0 },
3300 { "__attribute__", RID_ATTRIBUTE, 0 },
3301 { "__bounded", RID_BOUNDED, 0 },
3302 { "__bounded__", RID_BOUNDED, 0 },
3303 { "__builtin_choose_expr", RID_CHOOSE_EXPR, 0 },
3304 { "__builtin_types_compatible_p", RID_TYPES_COMPATIBLE_P, 0 },
3305 { "__builtin_va_arg", RID_VA_ARG, 0 },
3306 { "__complex", RID_COMPLEX, 0 },
3307 { "__complex__", RID_COMPLEX, 0 },
3308 { "__const", RID_CONST, 0 },
3309 { "__const__", RID_CONST, 0 },
3310 { "__extension__", RID_EXTENSION, 0 },
3311 { "__func__", RID_C99_FUNCTION_NAME, 0 },
3312 { "__imag", RID_IMAGPART, 0 },
3313 { "__imag__", RID_IMAGPART, 0 },
3314 { "__inline", RID_INLINE, 0 },
3315 { "__inline__", RID_INLINE, 0 },
3316 { "__label__", RID_LABEL, 0 },
3317 { "__ptrbase", RID_PTRBASE, 0 },
3318 { "__ptrbase__", RID_PTRBASE, 0 },
3319 { "__ptrextent", RID_PTREXTENT, 0 },
3320 { "__ptrextent__", RID_PTREXTENT, 0 },
3321 { "__ptrvalue", RID_PTRVALUE, 0 },
3322 { "__ptrvalue__", RID_PTRVALUE, 0 },
3323 { "__real", RID_REALPART, 0 },
3324 { "__real__", RID_REALPART, 0 },
3325 { "__restrict", RID_RESTRICT, 0 },
3326 { "__restrict__", RID_RESTRICT, 0 },
3327 { "__signed", RID_SIGNED, 0 },
3328 { "__signed__", RID_SIGNED, 0 },
3329 { "__typeof", RID_TYPEOF, 0 },
3330 { "__typeof__", RID_TYPEOF, 0 },
3331 { "__unbounded", RID_UNBOUNDED, 0 },
3332 { "__unbounded__", RID_UNBOUNDED, 0 },
3333 { "__volatile", RID_VOLATILE, 0 },
3334 { "__volatile__", RID_VOLATILE, 0 },
3335 { "asm", RID_ASM, D_EXT },
3336 { "auto", RID_AUTO, 0 },
3337 { "break", RID_BREAK, 0 },
3338 { "case", RID_CASE, 0 },
3339 { "char", RID_CHAR, 0 },
3340 { "const", RID_CONST, D_TRAD },
3341 { "continue", RID_CONTINUE, 0 },
3342 { "default", RID_DEFAULT, 0 },
3343 { "do", RID_DO, 0 },
3344 { "double", RID_DOUBLE, 0 },
3345 { "else", RID_ELSE, 0 },
3346 { "enum", RID_ENUM, 0 },
3347 { "extern", RID_EXTERN, 0 },
3348 { "float", RID_FLOAT, 0 },
3349 { "for", RID_FOR, 0 },
3350 { "goto", RID_GOTO, 0 },
3351 { "if", RID_IF, 0 },
3352 { "inline", RID_INLINE, D_TRAD|D_EXT89 },
3353 { "int", RID_INT, 0 },
3354 { "long", RID_LONG, 0 },
3355 { "register", RID_REGISTER, 0 },
3356 { "restrict", RID_RESTRICT, D_TRAD|D_C89 },
3357 { "return", RID_RETURN, 0 },
3358 { "short", RID_SHORT, 0 },
3359 { "signed", RID_SIGNED, D_TRAD },
3360 { "sizeof", RID_SIZEOF, 0 },
3361 { "static", RID_STATIC, 0 },
3362 { "struct", RID_STRUCT, 0 },
3363 { "switch", RID_SWITCH, 0 },
3364 { "typedef", RID_TYPEDEF, 0 },
3365 { "typeof", RID_TYPEOF, D_TRAD|D_EXT },
3366 { "union", RID_UNION, 0 },
3367 { "unsigned", RID_UNSIGNED, 0 },
3368 { "void", RID_VOID, 0 },
3369 { "volatile", RID_VOLATILE, D_TRAD },
3370 { "while", RID_WHILE, 0 },
3371 ifobjc
3372 { "id", RID_ID, D_OBJC },
3374 /* These objc keywords are recognized only immediately after
3375 an '@'. */
3376 { "class", RID_AT_CLASS, D_OBJC },
3377 { "compatibility_alias", RID_AT_ALIAS, D_OBJC },
3378 { "defs", RID_AT_DEFS, D_OBJC },
3379 { "encode", RID_AT_ENCODE, D_OBJC },
3380 { "end", RID_AT_END, D_OBJC },
3381 { "implementation", RID_AT_IMPLEMENTATION, D_OBJC },
3382 { "interface", RID_AT_INTERFACE, D_OBJC },
3383 { "private", RID_AT_PRIVATE, D_OBJC },
3384 { "protected", RID_AT_PROTECTED, D_OBJC },
3385 { "protocol", RID_AT_PROTOCOL, D_OBJC },
3386 { "public", RID_AT_PUBLIC, D_OBJC },
3387 { "selector", RID_AT_SELECTOR, D_OBJC },
3389 /* These are recognized only in protocol-qualifier context
3390 (see above) */
3391 { "bycopy", RID_BYCOPY, D_OBJC },
3392 { "byref", RID_BYREF, D_OBJC },
3393 { "in", RID_IN, D_OBJC },
3394 { "inout", RID_INOUT, D_OBJC },
3395 { "oneway", RID_ONEWAY, D_OBJC },
3396 { "out", RID_OUT, D_OBJC },
3397 end ifobjc
3398 };
3399 #define N_reswords (sizeof reswords / sizeof (struct resword))
3401 /* Table mapping from RID_* constants to yacc token numbers.
3402 Unfortunately we have to have entries for all the keywords in all
3403 three languages. */
3404 static const short rid_to_yy[RID_MAX] =
3405 {
3406 /* RID_STATIC */ SCSPEC,
3407 /* RID_UNSIGNED */ TYPESPEC,
3408 /* RID_LONG */ TYPESPEC,
3409 /* RID_CONST */ TYPE_QUAL,
3410 /* RID_EXTERN */ SCSPEC,
3411 /* RID_REGISTER */ SCSPEC,
3412 /* RID_TYPEDEF */ SCSPEC,
3413 /* RID_SHORT */ TYPESPEC,
3414 /* RID_INLINE */ SCSPEC,
3415 /* RID_VOLATILE */ TYPE_QUAL,
3416 /* RID_SIGNED */ TYPESPEC,
3417 /* RID_AUTO */ SCSPEC,
3418 /* RID_RESTRICT */ TYPE_QUAL,
3420 /* C extensions */
3421 /* RID_BOUNDED */ TYPE_QUAL,
3422 /* RID_UNBOUNDED */ TYPE_QUAL,
3423 /* RID_COMPLEX */ TYPESPEC,
3425 /* C++ */
3426 /* RID_FRIEND */ 0,
3427 /* RID_VIRTUAL */ 0,
3428 /* RID_EXPLICIT */ 0,
3429 /* RID_EXPORT */ 0,
3430 /* RID_MUTABLE */ 0,
3432 /* ObjC */
3433 /* RID_IN */ TYPE_QUAL,
3434 /* RID_OUT */ TYPE_QUAL,
3435 /* RID_INOUT */ TYPE_QUAL,
3436 /* RID_BYCOPY */ TYPE_QUAL,
3437 /* RID_BYREF */ TYPE_QUAL,
3438 /* RID_ONEWAY */ TYPE_QUAL,
3440 /* C */
3441 /* RID_INT */ TYPESPEC,
3442 /* RID_CHAR */ TYPESPEC,
3443 /* RID_FLOAT */ TYPESPEC,
3444 /* RID_DOUBLE */ TYPESPEC,
3445 /* RID_VOID */ TYPESPEC,
3446 /* RID_ENUM */ ENUM,
3447 /* RID_STRUCT */ STRUCT,
3448 /* RID_UNION */ UNION,
3449 /* RID_IF */ IF,
3450 /* RID_ELSE */ ELSE,
3451 /* RID_WHILE */ WHILE,
3452 /* RID_DO */ DO,
3453 /* RID_FOR */ FOR,
3454 /* RID_SWITCH */ SWITCH,
3455 /* RID_CASE */ CASE,
3456 /* RID_DEFAULT */ DEFAULT,
3457 /* RID_BREAK */ BREAK,
3458 /* RID_CONTINUE */ CONTINUE,
3459 /* RID_RETURN */ RETURN,
3460 /* RID_GOTO */ GOTO,
3461 /* RID_SIZEOF */ SIZEOF,
3463 /* C extensions */
3464 /* RID_ASM */ ASM_KEYWORD,
3465 /* RID_TYPEOF */ TYPEOF,
3466 /* RID_ALIGNOF */ ALIGNOF,
3467 /* RID_ATTRIBUTE */ ATTRIBUTE,
3468 /* RID_VA_ARG */ VA_ARG,
3469 /* RID_EXTENSION */ EXTENSION,
3470 /* RID_IMAGPART */ IMAGPART,
3471 /* RID_REALPART */ REALPART,
3472 /* RID_LABEL */ LABEL,
3473 /* RID_PTRBASE */ PTR_BASE,
3474 /* RID_PTREXTENT */ PTR_EXTENT,
3475 /* RID_PTRVALUE */ PTR_VALUE,
3477 /* RID_CHOOSE_EXPR */ CHOOSE_EXPR,
3478 /* RID_TYPES_COMPATIBLE_P */ TYPES_COMPATIBLE_P,
3480 /* RID_FUNCTION_NAME */ STRING_FUNC_NAME,
3481 /* RID_PRETTY_FUNCTION_NAME */ STRING_FUNC_NAME,
3482 /* RID_C99_FUNCTION_NAME */ VAR_FUNC_NAME,
3484 /* C++ */
3485 /* RID_BOOL */ TYPESPEC,
3486 /* RID_WCHAR */ 0,
3487 /* RID_CLASS */ 0,
3488 /* RID_PUBLIC */ 0,
3489 /* RID_PRIVATE */ 0,
3490 /* RID_PROTECTED */ 0,
3491 /* RID_TEMPLATE */ 0,
3492 /* RID_NULL */ 0,
3493 /* RID_CATCH */ 0,
3494 /* RID_DELETE */ 0,
3495 /* RID_FALSE */ 0,
3496 /* RID_NAMESPACE */ 0,
3497 /* RID_NEW */ 0,
3498 /* RID_OPERATOR */ 0,
3499 /* RID_THIS */ 0,
3500 /* RID_THROW */ 0,
3501 /* RID_TRUE */ 0,
3502 /* RID_TRY */ 0,
3503 /* RID_TYPENAME */ 0,
3504 /* RID_TYPEID */ 0,
3505 /* RID_USING */ 0,
3507 /* casts */
3508 /* RID_CONSTCAST */ 0,
3509 /* RID_DYNCAST */ 0,
3510 /* RID_REINTCAST */ 0,
3511 /* RID_STATCAST */ 0,
3513 /* alternate spellings */
3514 /* RID_AND */ 0,
3515 /* RID_AND_EQ */ 0,
3516 /* RID_NOT */ 0,
3517 /* RID_NOT_EQ */ 0,
3518 /* RID_OR */ 0,
3519 /* RID_OR_EQ */ 0,
3520 /* RID_XOR */ 0,
3521 /* RID_XOR_EQ */ 0,
3522 /* RID_BITAND */ 0,
3523 /* RID_BITOR */ 0,
3524 /* RID_COMPL */ 0,
3526 /* Objective C */
3527 /* RID_ID */ OBJECTNAME,
3528 /* RID_AT_ENCODE */ ENCODE,
3529 /* RID_AT_END */ END,
3530 /* RID_AT_CLASS */ CLASS,
3531 /* RID_AT_ALIAS */ ALIAS,
3532 /* RID_AT_DEFS */ DEFS,
3533 /* RID_AT_PRIVATE */ PRIVATE,
3534 /* RID_AT_PROTECTED */ PROTECTED,
3535 /* RID_AT_PUBLIC */ PUBLIC,
3536 /* RID_AT_PROTOCOL */ PROTOCOL,
3537 /* RID_AT_SELECTOR */ SELECTOR,
3538 /* RID_AT_INTERFACE */ INTERFACE,
3539 /* RID_AT_IMPLEMENTATION */ IMPLEMENTATION
3540 };
3542 static void
3543 init_reswords ()
3544 {
3545 unsigned int i;
3546 tree id;
3547 int mask = (flag_isoc99 ? 0 : D_C89)
3548 | (flag_traditional ? D_TRAD : 0)
3549 | (flag_no_asm ? (flag_isoc99 ? D_EXT : D_EXT|D_EXT89) : 0);
3551 if (c_language != clk_objective_c)
3552 mask |= D_OBJC;
3554 /* It is not necessary to register ridpointers as a GC root, because
3555 all the trees it points to are permanently interned in the
3556 get_identifier hash anyway. */
3557 ridpointers = (tree *) xcalloc ((int) RID_MAX, sizeof (tree));
3558 for (i = 0; i < N_reswords; i++)
3559 {
3560 /* If a keyword is disabled, do not enter it into the table
3561 and so create a canonical spelling that isn't a keyword. */
3562 if (reswords[i].disable & mask)
3563 continue;
3565 id = get_identifier (reswords[i].word);
3566 C_RID_CODE (id) = reswords[i].rid;
3567 C_IS_RESERVED_WORD (id) = 1;
3568 ridpointers [(int) reswords[i].rid] = id;
3569 }
3570 }
3572 #define NAME(type) cpp_type2name (type)
3574 static void
3575 yyerror (msgid)
3576 const char *msgid;
3577 {
3578 const char *string = _(msgid);
3580 if (last_token == CPP_EOF)
3581 error ("%s at end of input", string);
3582 else if (last_token == CPP_CHAR || last_token == CPP_WCHAR)
3583 {
3584 unsigned int val = TREE_INT_CST_LOW (yylval.ttype);
3585 const char *const ell = (last_token == CPP_CHAR) ? "" : "L";
3586 if (val <= UCHAR_MAX && ISGRAPH (val))
3587 error ("%s before %s'%c'", string, ell, val);
3588 else
3589 error ("%s before %s'\\x%x'", string, ell, val);
3590 }
3591 else if (last_token == CPP_STRING
3592 || last_token == CPP_WSTRING)
3593 error ("%s before string constant", string);
3594 else if (last_token == CPP_NUMBER)
3595 error ("%s before numeric constant", string);
3596 else if (last_token == CPP_NAME)
3597 error ("%s before \"%s\"", string, IDENTIFIER_POINTER (yylval.ttype));
3598 else
3599 error ("%s before '%s' token", string, NAME(last_token));
3600 }
3602 static int
3603 yylexname ()
3604 {
3605 tree decl;
3607 ifobjc
3608 int objc_force_identifier = objc_need_raw_identifier;
3609 OBJC_NEED_RAW_IDENTIFIER (0);
3610 end ifobjc
3612 if (C_IS_RESERVED_WORD (yylval.ttype))
3613 {
3614 enum rid rid_code = C_RID_CODE (yylval.ttype);
3616 ifobjc
3617 /* Turn non-typedefed refs to "id" into plain identifiers; this
3618 allows constructs like "void foo(id id);" to work. */
3619 if (rid_code == RID_ID)
3620 {
3621 decl = lookup_name (yylval.ttype);
3622 if (decl == NULL_TREE || TREE_CODE (decl) != TYPE_DECL)
3623 return IDENTIFIER;
3624 }
3626 if (!OBJC_IS_AT_KEYWORD (rid_code)
3627 && (!OBJC_IS_PQ_KEYWORD (rid_code) || objc_pq_context))
3628 end ifobjc
3629 {
3630 int yycode = rid_to_yy[(int) rid_code];
3631 if (yycode == STRING_FUNC_NAME)
3632 {
3633 /* __FUNCTION__ and __PRETTY_FUNCTION__ get converted
3634 to string constants. */
3635 const char *name = fname_string (rid_code);
3637 yylval.ttype = build_string (strlen (name) + 1, name);
3638 C_ARTIFICIAL_STRING_P (yylval.ttype) = 1;
3639 last_token = CPP_STRING; /* so yyerror won't choke */
3640 return STRING;
3641 }
3643 /* Return the canonical spelling for this keyword. */
3644 yylval.ttype = ridpointers[(int) rid_code];
3645 return yycode;
3646 }
3647 }
3649 decl = lookup_name (yylval.ttype);
3650 if (decl)
3651 {
3652 if (TREE_CODE (decl) == TYPE_DECL)
3653 return TYPENAME;
3654 }
3655 ifobjc
3656 else
3657 {
3658 tree objc_interface_decl = is_class_name (yylval.ttype);
3659 /* ObjC class names are in the same namespace as variables and
3660 typedefs, and hence are shadowed by local declarations. */
3661 if (objc_interface_decl
3662 && (global_bindings_p ()
3663 || (!objc_force_identifier && !decl)))
3664 {
3665 yylval.ttype = objc_interface_decl;
3666 return CLASSNAME;
3667 }
3668 }
3669 end ifobjc
3671 return IDENTIFIER;
3672 }
3675 static inline int
3676 _yylex ()
3677 {
3678 get_next:
3679 last_token = c_lex (&yylval.ttype);
3680 switch (last_token)
3681 {
3682 case CPP_EQ: return '=';
3683 case CPP_NOT: return '!';
3684 case CPP_GREATER: yylval.code = GT_EXPR; return ARITHCOMPARE;
3685 case CPP_LESS: yylval.code = LT_EXPR; return ARITHCOMPARE;
3686 case CPP_PLUS: yylval.code = PLUS_EXPR; return '+';
3687 case CPP_MINUS: yylval.code = MINUS_EXPR; return '-';
3688 case CPP_MULT: yylval.code = MULT_EXPR; return '*';
3689 case CPP_DIV: yylval.code = TRUNC_DIV_EXPR; return '/';
3690 case CPP_MOD: yylval.code = TRUNC_MOD_EXPR; return '%';
3691 case CPP_AND: yylval.code = BIT_AND_EXPR; return '&';
3692 case CPP_OR: yylval.code = BIT_IOR_EXPR; return '|';
3693 case CPP_XOR: yylval.code = BIT_XOR_EXPR; return '^';
3694 case CPP_RSHIFT: yylval.code = RSHIFT_EXPR; return RSHIFT;
3695 case CPP_LSHIFT: yylval.code = LSHIFT_EXPR; return LSHIFT;
3697 case CPP_COMPL: return '~';
3698 case CPP_AND_AND: return ANDAND;
3699 case CPP_OR_OR: return OROR;
3700 case CPP_QUERY: return '?';
3701 case CPP_OPEN_PAREN: return '(';
3702 case CPP_EQ_EQ: yylval.code = EQ_EXPR; return EQCOMPARE;
3703 case CPP_NOT_EQ: yylval.code = NE_EXPR; return EQCOMPARE;
3704 case CPP_GREATER_EQ:yylval.code = GE_EXPR; return ARITHCOMPARE;
3705 case CPP_LESS_EQ: yylval.code = LE_EXPR; return ARITHCOMPARE;
3707 case CPP_PLUS_EQ: yylval.code = PLUS_EXPR; return ASSIGN;
3708 case CPP_MINUS_EQ: yylval.code = MINUS_EXPR; return ASSIGN;
3709 case CPP_MULT_EQ: yylval.code = MULT_EXPR; return ASSIGN;
3710 case CPP_DIV_EQ: yylval.code = TRUNC_DIV_EXPR; return ASSIGN;
3711 case CPP_MOD_EQ: yylval.code = TRUNC_MOD_EXPR; return ASSIGN;
3712 case CPP_AND_EQ: yylval.code = BIT_AND_EXPR; return ASSIGN;
3713 case CPP_OR_EQ: yylval.code = BIT_IOR_EXPR; return ASSIGN;
3714 case CPP_XOR_EQ: yylval.code = BIT_XOR_EXPR; return ASSIGN;
3715 case CPP_RSHIFT_EQ: yylval.code = RSHIFT_EXPR; return ASSIGN;
3716 case CPP_LSHIFT_EQ: yylval.code = LSHIFT_EXPR; return ASSIGN;
3718 case CPP_OPEN_SQUARE: return '[';
3719 case CPP_CLOSE_SQUARE: return ']';
3720 case CPP_OPEN_BRACE: return '{';
3721 case CPP_CLOSE_BRACE: return '}';
3722 case CPP_ELLIPSIS: return ELLIPSIS;
3724 case CPP_PLUS_PLUS: return PLUSPLUS;
3725 case CPP_MINUS_MINUS: return MINUSMINUS;
3726 case CPP_DEREF: return POINTSAT;
3727 case CPP_DOT: return '.';
3729 /* The following tokens may affect the interpretation of any
3730 identifiers following, if doing Objective-C. */
3731 case CPP_COLON: OBJC_NEED_RAW_IDENTIFIER (0); return ':';
3732 case CPP_COMMA: OBJC_NEED_RAW_IDENTIFIER (0); return ',';
3733 case CPP_CLOSE_PAREN: OBJC_NEED_RAW_IDENTIFIER (0); return ')';
3734 case CPP_SEMICOLON: OBJC_NEED_RAW_IDENTIFIER (0); return ';';
3736 case CPP_EOF:
3737 return 0;
3739 case CPP_NAME:
3740 return yylexname ();
3742 case CPP_NUMBER:
3743 case CPP_CHAR:
3744 case CPP_WCHAR:
3745 return CONSTANT;
3747 case CPP_STRING:
3748 case CPP_WSTRING:
3749 return STRING;
3751 /* This token is Objective-C specific. It gives the next token
3752 special significance. */
3753 case CPP_ATSIGN:
3754 ifobjc
3755 {
3756 tree after_at;
3757 enum cpp_ttype after_at_type;
3759 after_at_type = c_lex (&after_at);
3761 if (after_at_type == CPP_NAME
3762 && C_IS_RESERVED_WORD (after_at)
3763 && OBJC_IS_AT_KEYWORD (C_RID_CODE (after_at)))
3764 {
3765 yylval.ttype = after_at;
3766 last_token = after_at_type;
3767 return rid_to_yy [(int) C_RID_CODE (after_at)];
3768 }
3769 _cpp_backup_tokens (parse_in, 1);
3770 return '@';
3771 }
3772 end ifobjc
3774 /* These tokens are C++ specific (and will not be generated
3775 in C mode, but let's be cautious). */
3776 case CPP_SCOPE:
3777 case CPP_DEREF_STAR:
3778 case CPP_DOT_STAR:
3779 case CPP_MIN_EQ:
3780 case CPP_MAX_EQ:
3781 case CPP_MIN:
3782 case CPP_MAX:
3783 /* These tokens should not survive translation phase 4. */
3784 case CPP_HASH:
3785 case CPP_PASTE:
3786 error ("syntax error at '%s' token", NAME(last_token));
3787 goto get_next;
3789 default:
3790 abort ();
3791 }
3792 /* NOTREACHED */
3793 }
3795 static int
3796 yylex()
3797 {
3798 int r;
3799 timevar_push (TV_LEX);
3800 r = _yylex();
3801 timevar_pop (TV_LEX);
3802 return r;
3803 }
3805 /* Sets the value of the 'yydebug' variable to VALUE.
3806 This is a function so we don't have to have YYDEBUG defined
3807 in order to build the compiler. */
3809 void
3810 c_set_yydebug (value)
3811 int value;
3812 {
3813 #if YYDEBUG != 0
3814 yydebug = value;
3815 #else
3816 warning ("YYDEBUG not defined");
3817 #endif
3818 }
3820 /* Function used when yydebug is set, to print a token in more detail. */
3822 static void
3823 yyprint (file, yychar, yyl)
3824 FILE *file;
3825 int yychar;
3826 YYSTYPE yyl;
3827 {
3828 tree t = yyl.ttype;
3830 fprintf (file, " [%s]", NAME(last_token));
3832 switch (yychar)
3833 {
3834 case IDENTIFIER:
3835 case TYPENAME:
3836 case OBJECTNAME:
3837 case TYPESPEC:
3838 case TYPE_QUAL:
3839 case SCSPEC:
3840 if (IDENTIFIER_POINTER (t))
3841 fprintf (file, " `%s'", IDENTIFIER_POINTER (t));
3842 break;
3844 case CONSTANT:
3845 fprintf (file, " %s", GET_MODE_NAME (TYPE_MODE (TREE_TYPE (t))));
3846 if (TREE_CODE (t) == INTEGER_CST)
3847 fprintf (file,
3848 #if HOST_BITS_PER_WIDE_INT == 64
3849 #if HOST_BITS_PER_WIDE_INT == HOST_BITS_PER_INT
3850 " 0x%x%016x",
3851 #else
3852 #if HOST_BITS_PER_WIDE_INT == HOST_BITS_PER_LONG
3853 " 0x%lx%016lx",
3854 #else
3855 " 0x%llx%016llx",
3856 #endif
3857 #endif
3858 #else
3859 #if HOST_BITS_PER_WIDE_INT != HOST_BITS_PER_INT
3860 " 0x%lx%08lx",
3861 #else
3862 " 0x%x%08x",
3863 #endif
3864 #endif
3865 TREE_INT_CST_HIGH (t), TREE_INT_CST_LOW (t));
3866 break;
3867 }
3868 }
3869 \f
3870 /* This is not the ideal place to put these, but we have to get them out
3871 of c-lex.c because cp/lex.c has its own versions. */
3873 /* Return something to represent absolute declarators containing a *.
3874 TARGET is the absolute declarator that the * contains.
3875 TYPE_QUALS_ATTRS is a list of modifiers such as const or volatile
3876 to apply to the pointer type, represented as identifiers, possible mixed
3877 with attributes.
3879 We return an INDIRECT_REF whose "contents" are TARGET (inside a TREE_LIST,
3880 if attributes are present) and whose type is the modifier list. */
3882 tree
3883 make_pointer_declarator (type_quals_attrs, target)
3884 tree type_quals_attrs, target;
3885 {
3886 tree quals, attrs;
3887 tree itarget = target;
3888 split_specs_attrs (type_quals_attrs, &quals, &attrs);
3889 if (attrs != NULL_TREE)
3890 itarget = tree_cons (attrs, target, NULL_TREE);
3891 return build1 (INDIRECT_REF, quals, itarget);
3892 }