| blob | 7efe9cd6b20796538fb538912e7f9fed2d61e8de |
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 Free Software Foundation, Inc.
5 This file is part of GNU CC.
7 GNU CC is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2, or (at your option)
10 any later version.
12 GNU CC is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GNU CC; see the file COPYING. If not, write to
19 the Free Software Foundation, 59 Temple Place - Suite 330,
20 Boston, MA 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 74
33 end ifobjc
34 ifc
35 %expect 53
36 end ifc
38 %{
39 #include "config.h"
40 #include "system.h"
41 #include <setjmp.h>
42 #include "tree.h"
43 #include "input.h"
44 #include "c-lex.h"
45 #include "c-tree.h"
46 #include "flags.h"
47 #include "output.h"
48 #include "toplev.h"
49 #include "ggc.h"
51 #ifdef MULTIBYTE_CHARS
52 #include <locale.h>
53 #endif
55 ifobjc
56 #include "objc-act.h"
57 end ifobjc
59 /* Since parsers are distinct for each language, put the language string
60 definition here. */
61 ifobjc
62 const char * const language_string = "GNU Obj-C";
63 end ifobjc
64 ifc
65 const char * const language_string = "GNU C";
66 end ifc
68 /* Like YYERROR but do call yyerror. */
69 #define YYERROR1 { yyerror ("syntax error"); YYERROR; }
71 /* Cause the `yydebug' variable to be defined. */
72 #define YYDEBUG 1
73 %}
75 %start program
77 %union {long itype; tree ttype; enum tree_code code;
78 const char *filename; int lineno; int ends_in_label; }
80 /* All identifiers that are not reserved words
81 and are not declared typedefs in the current block */
82 %token IDENTIFIER
84 /* All identifiers that are declared typedefs in the current block.
85 In some contexts, they are treated just like IDENTIFIER,
86 but they can also serve as typespecs in declarations. */
87 %token TYPENAME
89 /* Reserved words that specify storage class.
90 yylval contains an IDENTIFIER_NODE which indicates which one. */
91 %token SCSPEC
93 /* Reserved words that specify type.
94 yylval contains an IDENTIFIER_NODE which indicates which one. */
95 %token TYPESPEC
97 /* Reserved words that qualify type: "const", "volatile", or "restrict".
98 yylval contains an IDENTIFIER_NODE which indicates which one. */
99 %token TYPE_QUAL
101 /* Character or numeric constants.
102 yylval is the node for the constant. */
103 %token CONSTANT
105 /* String constants in raw form.
106 yylval is a STRING_CST node. */
107 %token STRING
109 /* "...", used for functions with variable arglists. */
110 %token ELLIPSIS
112 /* the reserved words */
113 /* SCO include files test "ASM", so use something else. */
114 %token SIZEOF ENUM STRUCT UNION IF ELSE WHILE DO FOR SWITCH CASE DEFAULT
115 %token BREAK CONTINUE RETURN GOTO ASM_KEYWORD TYPEOF ALIGNOF
116 %token ATTRIBUTE EXTENSION LABEL
117 %token REALPART IMAGPART VA_ARG
118 %token PTR_VALUE PTR_BASE PTR_EXTENT
120 /* Used in c-lex.c for parsing pragmas. */
121 %token END_OF_LINE
123 /* Add precedence rules to solve dangling else s/r conflict */
124 %nonassoc IF
125 %nonassoc ELSE
127 /* Define the operator tokens and their precedences.
128 The value is an integer because, if used, it is the tree code
129 to use in the expression made from the operator. */
131 %right <code> ASSIGN '='
132 %right <code> '?' ':'
133 %left <code> OROR
134 %left <code> ANDAND
135 %left <code> '|'
136 %left <code> '^'
137 %left <code> '&'
138 %left <code> EQCOMPARE
139 %left <code> ARITHCOMPARE
140 %left <code> LSHIFT RSHIFT
141 %left <code> '+' '-'
142 %left <code> '*' '/' '%'
143 %right <code> UNARY PLUSPLUS MINUSMINUS
144 %left HYPERUNARY
145 %left <code> POINTSAT '.' '(' '['
147 /* The Objective-C keywords. These are included in C and in
148 Objective C, so that the token codes are the same in both. */
149 %token INTERFACE IMPLEMENTATION END SELECTOR DEFS ENCODE
150 %token CLASSNAME PUBLIC PRIVATE PROTECTED PROTOCOL OBJECTNAME CLASS ALIAS
152 /* Objective-C string constants in raw form.
153 yylval is an OBJC_STRING_CST node. */
154 %token OBJC_STRING
157 %type <code> unop
159 %type <ttype> identifier IDENTIFIER TYPENAME CONSTANT expr nonnull_exprlist exprlist
160 %type <ttype> expr_no_commas cast_expr unary_expr primary string STRING
161 %type <ttype> typed_declspecs reserved_declspecs
162 %type <ttype> typed_typespecs reserved_typespecquals
163 %type <ttype> declmods typespec typespecqual_reserved
164 %type <ttype> typed_declspecs_no_prefix_attr reserved_declspecs_no_prefix_attr
165 %type <ttype> declmods_no_prefix_attr
166 %type <ttype> SCSPEC TYPESPEC TYPE_QUAL nonempty_type_quals maybe_type_qual
167 %type <ttype> initdecls notype_initdecls initdcl notype_initdcl
168 %type <ttype> init maybeasm
169 %type <ttype> asm_operands nonnull_asm_operands asm_operand asm_clobbers
170 %type <ttype> maybe_attribute attributes attribute attribute_list attrib
171 %type <ttype> any_word extension
173 %type <ttype> compstmt compstmt_nostart compstmt_primary_start
175 %type <ttype> declarator
176 %type <ttype> notype_declarator after_type_declarator
177 %type <ttype> parm_declarator
179 %type <ttype> structsp component_decl_list component_decl_list2
180 %type <ttype> component_decl components component_declarator
181 %type <ttype> enumlist enumerator
182 %type <ttype> struct_head union_head enum_head
183 %type <ttype> typename absdcl absdcl1 type_quals
184 %type <ttype> xexpr parms parm identifiers
186 %type <ttype> parmlist parmlist_1 parmlist_2
187 %type <ttype> parmlist_or_identifiers parmlist_or_identifiers_1
188 %type <ttype> identifiers_or_typenames
190 %type <itype> setspecs
192 %type <ends_in_label> lineno_stmt_or_label lineno_stmt_or_labels stmt_or_label
194 %type <filename> save_filename
195 %type <lineno> save_lineno
196 \f
197 ifobjc
198 /* the Objective-C nonterminals */
200 %type <ttype> ivar_decl_list ivar_decls ivar_decl ivars ivar_declarator
201 %type <ttype> methoddecl unaryselector keywordselector selector
202 %type <ttype> keyworddecl receiver objcmessageexpr messageargs
203 %type <ttype> keywordexpr keywordarglist keywordarg
204 %type <ttype> myparms myparm optparmlist reservedwords objcselectorexpr
205 %type <ttype> selectorarg keywordnamelist keywordname objcencodeexpr
206 %type <ttype> objc_string non_empty_protocolrefs protocolrefs identifier_list objcprotocolexpr
208 %type <ttype> CLASSNAME OBJC_STRING OBJECTNAME
209 end ifobjc
210 \f
211 %{
212 /* Number of statements (loosely speaking) and compound statements
213 seen so far. */
214 static int stmt_count;
215 static int compstmt_count;
217 /* Input file and line number of the end of the body of last simple_if;
218 used by the stmt-rule immediately after simple_if returns. */
219 static const char *if_stmt_file;
220 static int if_stmt_line;
222 /* List of types and structure classes of the current declaration. */
223 static tree current_declspecs = NULL_TREE;
224 static tree prefix_attributes = NULL_TREE;
226 /* Stack of saved values of current_declspecs and prefix_attributes. */
227 static tree declspec_stack;
229 /* For __extension__, save/restore the warning flags which are
230 controlled by __extension__. */
231 #define SAVE_WARN_FLAGS() \
232 size_int (pedantic | (warn_pointer_arith << 1))
233 #define RESTORE_WARN_FLAGS(tval) \
234 do { \
235 int val = tree_low_cst (tval, 0); \
236 pedantic = val & 1; \
237 warn_pointer_arith = (val >> 1) & 1; \
238 } while (0)
240 ifobjc
241 /* Objective-C specific information */
243 tree objc_interface_context;
244 tree objc_implementation_context;
245 tree objc_method_context;
246 tree objc_ivar_chain;
247 tree objc_ivar_context;
248 enum tree_code objc_inherit_code;
249 int objc_receiver_context;
250 int objc_public_flag;
252 end ifobjc
254 /* Tell yyparse how to print a token's value, if yydebug is set. */
256 #define YYPRINT(FILE,YYCHAR,YYLVAL) yyprint(FILE,YYCHAR,YYLVAL)
257 extern void yyprint PARAMS ((FILE *, int, YYSTYPE));
259 /* Add GC roots for variables local to this file. */
260 void
261 c_parse_init ()
262 {
263 ggc_add_tree_root (&declspec_stack, 1);
264 ggc_add_tree_root (¤t_declspecs, 1);
265 ggc_add_tree_root (&prefix_attributes, 1);
266 ifobjc
267 ggc_add_tree_root (&objc_interface_context, 1);
268 ggc_add_tree_root (&objc_implementation_context, 1);
269 ggc_add_tree_root (&objc_method_context, 1);
270 ggc_add_tree_root (&objc_ivar_chain, 1);
271 ggc_add_tree_root (&objc_ivar_context, 1);
272 end ifobjc
273 }
275 %}
276 \f
277 %%
278 program: /* empty */
279 { if (pedantic)
280 pedwarn ("ANSI C forbids an empty source file");
281 finish_file ();
282 }
283 | extdefs
284 {
285 /* In case there were missing closebraces,
286 get us back to the global binding level. */
287 while (! global_bindings_p ())
288 poplevel (0, 0, 0);
289 finish_file ();
290 }
291 ;
293 /* the reason for the strange actions in this rule
294 is so that notype_initdecls when reached via datadef
295 can find a valid list of type and sc specs in $0. */
297 extdefs:
298 {$<ttype>$ = NULL_TREE; } extdef
299 | extdefs {$<ttype>$ = NULL_TREE; } extdef
300 ;
302 extdef:
303 fndef
304 | datadef
305 ifobjc
306 | objcdef
307 end ifobjc
308 | ASM_KEYWORD '(' expr ')' ';'
309 { STRIP_NOPS ($3);
310 if ((TREE_CODE ($3) == ADDR_EXPR
311 && TREE_CODE (TREE_OPERAND ($3, 0)) == STRING_CST)
312 || TREE_CODE ($3) == STRING_CST)
313 assemble_asm ($3);
314 else
315 error ("argument of `asm' is not a constant string"); }
316 | extension extdef
317 { RESTORE_WARN_FLAGS ($1); }
318 ;
320 datadef:
321 setspecs notype_initdecls ';'
322 { if (pedantic)
323 error ("ANSI C forbids data definition with no type or storage class");
324 else if (!flag_traditional)
325 warning ("data definition has no type or storage class");
327 current_declspecs = TREE_VALUE (declspec_stack);
328 prefix_attributes = TREE_PURPOSE (declspec_stack);
329 declspec_stack = TREE_CHAIN (declspec_stack); }
330 | declmods setspecs notype_initdecls ';'
331 { current_declspecs = TREE_VALUE (declspec_stack);
332 prefix_attributes = TREE_PURPOSE (declspec_stack);
333 declspec_stack = TREE_CHAIN (declspec_stack); }
334 | typed_declspecs setspecs initdecls ';'
335 { current_declspecs = TREE_VALUE (declspec_stack);
336 prefix_attributes = TREE_PURPOSE (declspec_stack);
337 declspec_stack = TREE_CHAIN (declspec_stack); }
338 | declmods ';'
339 { pedwarn ("empty declaration"); }
340 | typed_declspecs ';'
341 { shadow_tag ($1); }
342 | error ';'
343 | error '}'
344 | ';'
345 { if (pedantic)
346 pedwarn ("ANSI C does not allow extra `;' outside of a function"); }
347 ;
348 \f
349 fndef:
350 typed_declspecs setspecs declarator
351 { if (! start_function (current_declspecs, $3,
352 prefix_attributes, NULL_TREE))
353 YYERROR1;
354 reinit_parse_for_function (); }
355 old_style_parm_decls
356 { store_parm_decls (); }
357 compstmt_or_error
358 { finish_function (0);
359 current_declspecs = TREE_VALUE (declspec_stack);
360 prefix_attributes = TREE_PURPOSE (declspec_stack);
361 declspec_stack = TREE_CHAIN (declspec_stack); }
362 | typed_declspecs setspecs declarator error
363 { current_declspecs = TREE_VALUE (declspec_stack);
364 prefix_attributes = TREE_PURPOSE (declspec_stack);
365 declspec_stack = TREE_CHAIN (declspec_stack); }
366 | declmods setspecs notype_declarator
367 { if (! start_function (current_declspecs, $3,
368 prefix_attributes, NULL_TREE))
369 YYERROR1;
370 reinit_parse_for_function (); }
371 old_style_parm_decls
372 { store_parm_decls (); }
373 compstmt_or_error
374 { finish_function (0);
375 current_declspecs = TREE_VALUE (declspec_stack);
376 prefix_attributes = TREE_PURPOSE (declspec_stack);
377 declspec_stack = TREE_CHAIN (declspec_stack); }
378 | declmods setspecs notype_declarator error
379 { current_declspecs = TREE_VALUE (declspec_stack);
380 prefix_attributes = TREE_PURPOSE (declspec_stack);
381 declspec_stack = TREE_CHAIN (declspec_stack); }
382 | setspecs notype_declarator
383 { if (! start_function (NULL_TREE, $2,
384 prefix_attributes, NULL_TREE))
385 YYERROR1;
386 reinit_parse_for_function (); }
387 old_style_parm_decls
388 { store_parm_decls (); }
389 compstmt_or_error
390 { finish_function (0);
391 current_declspecs = TREE_VALUE (declspec_stack);
392 prefix_attributes = TREE_PURPOSE (declspec_stack);
393 declspec_stack = TREE_CHAIN (declspec_stack); }
394 | setspecs notype_declarator error
395 { current_declspecs = TREE_VALUE (declspec_stack);
396 prefix_attributes = TREE_PURPOSE (declspec_stack);
397 declspec_stack = TREE_CHAIN (declspec_stack); }
398 ;
400 identifier:
401 IDENTIFIER
402 | TYPENAME
403 ifobjc
404 | OBJECTNAME
405 | CLASSNAME
406 end ifobjc
407 ;
409 unop: '&'
410 { $$ = ADDR_EXPR; }
411 | '-'
412 { $$ = NEGATE_EXPR; }
413 | '+'
414 { $$ = CONVERT_EXPR; }
415 | PLUSPLUS
416 { $$ = PREINCREMENT_EXPR; }
417 | MINUSMINUS
418 { $$ = PREDECREMENT_EXPR; }
419 | '~'
420 { $$ = BIT_NOT_EXPR; }
421 | '!'
422 { $$ = TRUTH_NOT_EXPR; }
423 ;
425 expr: nonnull_exprlist
426 { $$ = build_compound_expr ($1); }
427 ;
429 exprlist:
430 /* empty */
431 { $$ = NULL_TREE; }
432 | nonnull_exprlist
433 ;
435 nonnull_exprlist:
436 expr_no_commas
437 { $$ = build_tree_list (NULL_TREE, $1); }
438 | nonnull_exprlist ',' expr_no_commas
439 { chainon ($1, build_tree_list (NULL_TREE, $3)); }
440 ;
442 unary_expr:
443 primary
444 | '*' cast_expr %prec UNARY
445 { $$ = build_indirect_ref ($2, "unary *"); }
446 /* __extension__ turns off -pedantic for following primary. */
447 | extension cast_expr %prec UNARY
448 { $$ = $2;
449 RESTORE_WARN_FLAGS ($1); }
450 | unop cast_expr %prec UNARY
451 { $$ = build_unary_op ($1, $2, 0);
452 overflow_warning ($$); }
453 /* Refer to the address of a label as a pointer. */
454 | ANDAND identifier
455 { tree label = lookup_label ($2);
456 if (pedantic)
457 pedwarn ("ANSI C forbids `&&'");
458 if (label == 0)
459 $$ = null_pointer_node;
460 else
461 {
462 TREE_USED (label) = 1;
463 $$ = build1 (ADDR_EXPR, ptr_type_node, label);
464 TREE_CONSTANT ($$) = 1;
465 }
466 }
467 /* This seems to be impossible on some machines, so let's turn it off.
468 You can use __builtin_next_arg to find the anonymous stack args.
469 | '&' ELLIPSIS
470 { tree types = TYPE_ARG_TYPES (TREE_TYPE (current_function_decl));
471 $$ = error_mark_node;
472 if (TREE_VALUE (tree_last (types)) == void_type_node)
473 error ("`&...' used in function with fixed number of arguments");
474 else
475 {
476 if (pedantic)
477 pedwarn ("ANSI C forbids `&...'");
478 $$ = tree_last (DECL_ARGUMENTS (current_function_decl));
479 $$ = build_unary_op (ADDR_EXPR, $$, 0);
480 } }
481 */
482 | sizeof unary_expr %prec UNARY
483 { skip_evaluation--;
484 if (TREE_CODE ($2) == COMPONENT_REF
485 && DECL_C_BIT_FIELD (TREE_OPERAND ($2, 1)))
486 error ("`sizeof' applied to a bit-field");
487 $$ = c_sizeof (TREE_TYPE ($2)); }
488 | sizeof '(' typename ')' %prec HYPERUNARY
489 { skip_evaluation--;
490 $$ = c_sizeof (groktypename ($3)); }
491 | alignof unary_expr %prec UNARY
492 { skip_evaluation--;
493 $$ = c_alignof_expr ($2); }
494 | alignof '(' typename ')' %prec HYPERUNARY
495 { skip_evaluation--;
496 $$ = c_alignof (groktypename ($3)); }
497 | REALPART cast_expr %prec UNARY
498 { $$ = build_unary_op (REALPART_EXPR, $2, 0); }
499 | IMAGPART cast_expr %prec UNARY
500 { $$ = build_unary_op (IMAGPART_EXPR, $2, 0); }
501 | VA_ARG '(' expr_no_commas ',' typename ')'
502 { $$ = build_va_arg ($3, groktypename ($5)); }
503 ;
505 sizeof:
506 SIZEOF { skip_evaluation++; }
507 ;
509 alignof:
510 ALIGNOF { skip_evaluation++; }
511 ;
513 cast_expr:
514 unary_expr
515 | '(' typename ')' cast_expr %prec UNARY
516 { tree type = groktypename ($2);
517 $$ = build_c_cast (type, $4); }
518 | '(' typename ')' '{'
519 { start_init (NULL_TREE, NULL, 0);
520 $2 = groktypename ($2);
521 really_start_incremental_init ($2); }
522 initlist_maybe_comma '}' %prec UNARY
523 { const char *name;
524 tree result = pop_init_level (0);
525 tree type = $2;
526 finish_init ();
528 if (pedantic && ! flag_isoc99)
529 pedwarn ("ANSI C forbids constructor expressions");
530 if (TYPE_NAME (type) != 0)
531 {
532 if (TREE_CODE (TYPE_NAME (type)) == IDENTIFIER_NODE)
533 name = IDENTIFIER_POINTER (TYPE_NAME (type));
534 else
535 name = IDENTIFIER_POINTER (DECL_NAME (TYPE_NAME (type)));
536 }
537 else
538 name = "";
539 $$ = result;
540 if (TREE_CODE (type) == ARRAY_TYPE && !COMPLETE_TYPE_P (type))
541 {
542 int failure = complete_array_type (type, $$, 1);
543 if (failure)
544 abort ();
545 }
546 }
547 ;
549 expr_no_commas:
550 cast_expr
551 | expr_no_commas '+' expr_no_commas
552 { $$ = parser_build_binary_op ($2, $1, $3); }
553 | expr_no_commas '-' expr_no_commas
554 { $$ = parser_build_binary_op ($2, $1, $3); }
555 | expr_no_commas '*' expr_no_commas
556 { $$ = parser_build_binary_op ($2, $1, $3); }
557 | expr_no_commas '/' expr_no_commas
558 { $$ = parser_build_binary_op ($2, $1, $3); }
559 | expr_no_commas '%' expr_no_commas
560 { $$ = parser_build_binary_op ($2, $1, $3); }
561 | expr_no_commas LSHIFT expr_no_commas
562 { $$ = parser_build_binary_op ($2, $1, $3); }
563 | expr_no_commas RSHIFT expr_no_commas
564 { $$ = parser_build_binary_op ($2, $1, $3); }
565 | expr_no_commas ARITHCOMPARE expr_no_commas
566 { $$ = parser_build_binary_op ($2, $1, $3); }
567 | expr_no_commas EQCOMPARE expr_no_commas
568 { $$ = parser_build_binary_op ($2, $1, $3); }
569 | expr_no_commas '&' expr_no_commas
570 { $$ = parser_build_binary_op ($2, $1, $3); }
571 | expr_no_commas '|' expr_no_commas
572 { $$ = parser_build_binary_op ($2, $1, $3); }
573 | expr_no_commas '^' expr_no_commas
574 { $$ = parser_build_binary_op ($2, $1, $3); }
575 | expr_no_commas ANDAND
576 { $1 = truthvalue_conversion (default_conversion ($1));
577 skip_evaluation += $1 == boolean_false_node; }
578 expr_no_commas
579 { skip_evaluation -= $1 == boolean_false_node;
580 $$ = parser_build_binary_op (TRUTH_ANDIF_EXPR, $1, $4); }
581 | expr_no_commas OROR
582 { $1 = truthvalue_conversion (default_conversion ($1));
583 skip_evaluation += $1 == boolean_true_node; }
584 expr_no_commas
585 { skip_evaluation -= $1 == boolean_true_node;
586 $$ = parser_build_binary_op (TRUTH_ORIF_EXPR, $1, $4); }
587 | expr_no_commas '?'
588 { $1 = truthvalue_conversion (default_conversion ($1));
589 skip_evaluation += $1 == boolean_false_node; }
590 expr ':'
591 { skip_evaluation += (($1 == boolean_true_node)
592 - ($1 == boolean_false_node)); }
593 expr_no_commas
594 { skip_evaluation -= $1 == boolean_true_node;
595 $$ = build_conditional_expr ($1, $4, $7); }
596 | expr_no_commas '?'
597 { if (pedantic)
598 pedwarn ("ANSI C forbids omitting the middle term of a ?: expression");
599 /* Make sure first operand is calculated only once. */
600 $<ttype>2 = save_expr ($1);
601 $1 = truthvalue_conversion (default_conversion ($<ttype>2));
602 skip_evaluation += $1 == boolean_true_node; }
603 ':' expr_no_commas
604 { skip_evaluation -= $1 == boolean_true_node;
605 $$ = build_conditional_expr ($1, $<ttype>2, $5); }
606 | expr_no_commas '=' expr_no_commas
607 { char class;
608 $$ = build_modify_expr ($1, NOP_EXPR, $3);
609 class = TREE_CODE_CLASS (TREE_CODE ($$));
610 if (class == 'e' || class == '1'
611 || class == '2' || class == '<')
612 C_SET_EXP_ORIGINAL_CODE ($$, MODIFY_EXPR);
613 }
614 | expr_no_commas ASSIGN expr_no_commas
615 { char class;
616 $$ = build_modify_expr ($1, $2, $3);
617 /* This inhibits warnings in truthvalue_conversion. */
618 class = TREE_CODE_CLASS (TREE_CODE ($$));
619 if (class == 'e' || class == '1'
620 || class == '2' || class == '<')
621 C_SET_EXP_ORIGINAL_CODE ($$, ERROR_MARK);
622 }
623 ;
625 primary:
626 IDENTIFIER
627 {
628 if (yychar == YYEMPTY)
629 yychar = YYLEX;
630 $$ = build_external_ref ($1, yychar == '(');
631 }
632 | CONSTANT
633 | string
634 { $$ = combine_strings ($1); }
635 | '(' expr ')'
636 { char class = TREE_CODE_CLASS (TREE_CODE ($2));
637 if (class == 'e' || class == '1'
638 || class == '2' || class == '<')
639 C_SET_EXP_ORIGINAL_CODE ($2, ERROR_MARK);
640 $$ = $2; }
641 | '(' error ')'
642 { $$ = error_mark_node; }
643 | compstmt_primary_start compstmt_nostart ')'
644 { tree rtl_exp;
645 if (pedantic)
646 pedwarn ("ANSI C forbids braced-groups within expressions");
647 pop_iterator_stack ();
648 pop_label_level ();
649 rtl_exp = expand_end_stmt_expr ($1);
650 /* The statements have side effects, so the group does. */
651 TREE_SIDE_EFFECTS (rtl_exp) = 1;
653 if (TREE_CODE ($2) == BLOCK)
654 {
655 /* Make a BIND_EXPR for the BLOCK already made. */
656 $$ = build (BIND_EXPR, TREE_TYPE (rtl_exp),
657 NULL_TREE, rtl_exp, $2);
658 /* Remove the block from the tree at this point.
659 It gets put back at the proper place
660 when the BIND_EXPR is expanded. */
661 delete_block ($2);
662 }
663 else
664 $$ = $2;
665 }
666 | compstmt_primary_start error ')'
667 {
668 /* Make sure we call expand_end_stmt_expr. Otherwise
669 we are likely to lose sequences and crash later. */
670 pop_iterator_stack ();
671 pop_label_level ();
672 expand_end_stmt_expr ($1);
673 $$ = error_mark_node;
674 }
675 | primary '(' exprlist ')' %prec '.'
676 { $$ = build_function_call ($1, $3); }
677 | primary '[' expr ']' %prec '.'
678 { $$ = build_array_ref ($1, $3); }
679 | primary '.' identifier
680 {
681 ifobjc
682 if (doing_objc_thang)
683 {
684 if (is_public ($1, $3))
685 $$ = build_component_ref ($1, $3);
686 else
687 $$ = error_mark_node;
688 }
689 else
690 end ifobjc
691 $$ = build_component_ref ($1, $3);
692 }
693 | primary POINTSAT identifier
694 {
695 tree expr = build_indirect_ref ($1, "->");
697 ifobjc
698 if (doing_objc_thang)
699 {
700 if (is_public (expr, $3))
701 $$ = build_component_ref (expr, $3);
702 else
703 $$ = error_mark_node;
704 }
705 else
706 end ifobjc
707 $$ = build_component_ref (expr, $3);
708 }
709 | primary PLUSPLUS
710 { $$ = build_unary_op (POSTINCREMENT_EXPR, $1, 0); }
711 | primary MINUSMINUS
712 { $$ = build_unary_op (POSTDECREMENT_EXPR, $1, 0); }
713 ifobjc
714 | objcmessageexpr
715 { $$ = build_message_expr ($1); }
716 | objcselectorexpr
717 { $$ = build_selector_expr ($1); }
718 | objcprotocolexpr
719 { $$ = build_protocol_expr ($1); }
720 | objcencodeexpr
721 { $$ = build_encode_expr ($1); }
722 | objc_string
723 { $$ = build_objc_string_object ($1); }
724 end ifobjc
725 ;
727 /* Produces a STRING_CST with perhaps more STRING_CSTs chained onto it. */
728 string:
729 STRING
730 | string STRING
731 { $$ = chainon ($1, $2);
732 ifc
733 if (warn_traditional && !in_system_header)
734 warning ("Use of ANSI string concatenation");
735 end ifc
736 }
737 ;
739 ifobjc
740 /* Produces an OBJC_STRING_CST with perhaps more OBJC_STRING_CSTs chained
741 onto it. */
742 objc_string:
743 OBJC_STRING
744 | objc_string OBJC_STRING
745 { $$ = chainon ($1, $2); }
746 ;
747 end ifobjc
749 old_style_parm_decls:
750 /* empty */
751 | datadecls
752 | datadecls ELLIPSIS
753 /* ... is used here to indicate a varargs function. */
754 { c_mark_varargs ();
755 if (pedantic)
756 pedwarn ("ANSI C does not permit use of `varargs.h'"); }
757 ;
759 /* The following are analogous to lineno_decl, decls and decl
760 except that they do not allow nested functions.
761 They are used for old-style parm decls. */
762 lineno_datadecl:
763 save_filename save_lineno datadecl
764 { }
765 ;
767 datadecls:
768 lineno_datadecl
769 | errstmt
770 | datadecls lineno_datadecl
771 | lineno_datadecl errstmt
772 ;
774 /* We don't allow prefix attributes here because they cause reduce/reduce
775 conflicts: we can't know whether we're parsing a function decl with
776 attribute suffix, or function defn with attribute prefix on first old
777 style parm. */
778 datadecl:
779 typed_declspecs_no_prefix_attr setspecs initdecls ';'
780 { current_declspecs = TREE_VALUE (declspec_stack);
781 prefix_attributes = TREE_PURPOSE (declspec_stack);
782 declspec_stack = TREE_CHAIN (declspec_stack); }
783 | declmods_no_prefix_attr setspecs notype_initdecls ';'
784 { current_declspecs = TREE_VALUE (declspec_stack);
785 prefix_attributes = TREE_PURPOSE (declspec_stack);
786 declspec_stack = TREE_CHAIN (declspec_stack); }
787 | typed_declspecs_no_prefix_attr ';'
788 { shadow_tag_warned ($1, 1);
789 pedwarn ("empty declaration"); }
790 | declmods_no_prefix_attr ';'
791 { pedwarn ("empty declaration"); }
792 ;
794 /* This combination which saves a lineno before a decl
795 is the normal thing to use, rather than decl itself.
796 This is to avoid shift/reduce conflicts in contexts
797 where statement labels are allowed. */
798 lineno_decl:
799 save_filename save_lineno decl
800 { }
801 ;
803 decls:
804 lineno_decl
805 | errstmt
806 | decls lineno_decl
807 | lineno_decl errstmt
808 ;
810 /* records the type and storage class specs to use for processing
811 the declarators that follow.
812 Maintains a stack of outer-level values of current_declspecs,
813 for the sake of parm declarations nested in function declarators. */
814 setspecs: /* empty */
815 { pending_xref_error ();
816 declspec_stack = tree_cons (prefix_attributes,
817 current_declspecs,
818 declspec_stack);
819 split_specs_attrs ($<ttype>0,
820 ¤t_declspecs, &prefix_attributes); }
821 ;
823 /* ??? Yuck. See after_type_declarator. */
824 setattrs: /* empty */
825 { prefix_attributes = chainon (prefix_attributes, $<ttype>0); }
826 ;
828 decl:
829 typed_declspecs setspecs initdecls ';'
830 { current_declspecs = TREE_VALUE (declspec_stack);
831 prefix_attributes = TREE_PURPOSE (declspec_stack);
832 declspec_stack = TREE_CHAIN (declspec_stack); }
833 | declmods setspecs notype_initdecls ';'
834 { current_declspecs = TREE_VALUE (declspec_stack);
835 prefix_attributes = TREE_PURPOSE (declspec_stack);
836 declspec_stack = TREE_CHAIN (declspec_stack); }
837 | typed_declspecs setspecs nested_function
838 { current_declspecs = TREE_VALUE (declspec_stack);
839 prefix_attributes = TREE_PURPOSE (declspec_stack);
840 declspec_stack = TREE_CHAIN (declspec_stack); }
841 | declmods setspecs notype_nested_function
842 { current_declspecs = TREE_VALUE (declspec_stack);
843 prefix_attributes = TREE_PURPOSE (declspec_stack);
844 declspec_stack = TREE_CHAIN (declspec_stack); }
845 | typed_declspecs ';'
846 { shadow_tag ($1); }
847 | declmods ';'
848 { pedwarn ("empty declaration"); }
849 | extension decl
850 { RESTORE_WARN_FLAGS ($1); }
851 ;
853 /* Declspecs which contain at least one type specifier or typedef name.
854 (Just `const' or `volatile' is not enough.)
855 A typedef'd name following these is taken as a name to be declared.
856 Declspecs have a non-NULL TREE_VALUE, attributes do not. */
858 typed_declspecs:
859 typespec reserved_declspecs
860 { $$ = tree_cons (NULL_TREE, $1, $2); }
861 | declmods typespec reserved_declspecs
862 { $$ = chainon ($3, tree_cons (NULL_TREE, $2, $1)); }
863 ;
865 reserved_declspecs: /* empty */
866 { $$ = NULL_TREE; }
867 | reserved_declspecs typespecqual_reserved
868 { $$ = tree_cons (NULL_TREE, $2, $1); }
869 | reserved_declspecs SCSPEC
870 { if (extra_warnings)
871 warning ("`%s' is not at beginning of declaration",
872 IDENTIFIER_POINTER ($2));
873 $$ = tree_cons (NULL_TREE, $2, $1); }
874 | reserved_declspecs attributes
875 { $$ = tree_cons ($2, NULL_TREE, $1); }
876 ;
878 typed_declspecs_no_prefix_attr:
879 typespec reserved_declspecs_no_prefix_attr
880 { $$ = tree_cons (NULL_TREE, $1, $2); }
881 | declmods_no_prefix_attr typespec reserved_declspecs_no_prefix_attr
882 { $$ = chainon ($3, tree_cons (NULL_TREE, $2, $1)); }
883 ;
885 reserved_declspecs_no_prefix_attr:
886 /* empty */
887 { $$ = NULL_TREE; }
888 | reserved_declspecs_no_prefix_attr typespecqual_reserved
889 { $$ = tree_cons (NULL_TREE, $2, $1); }
890 | reserved_declspecs_no_prefix_attr SCSPEC
891 { if (extra_warnings)
892 warning ("`%s' is not at beginning of declaration",
893 IDENTIFIER_POINTER ($2));
894 $$ = tree_cons (NULL_TREE, $2, $1); }
895 ;
897 /* List of just storage classes, type modifiers, and prefix attributes.
898 A declaration can start with just this, but then it cannot be used
899 to redeclare a typedef-name.
900 Declspecs have a non-NULL TREE_VALUE, attributes do not. */
902 declmods:
903 declmods_no_prefix_attr
904 { $$ = $1; }
905 | attributes
906 { $$ = tree_cons ($1, NULL_TREE, NULL_TREE); }
907 | declmods declmods_no_prefix_attr
908 { $$ = chainon ($2, $1); }
909 | declmods attributes
910 { $$ = tree_cons ($2, NULL_TREE, $1); }
911 ;
913 declmods_no_prefix_attr:
914 TYPE_QUAL
915 { $$ = tree_cons (NULL_TREE, $1, NULL_TREE);
916 TREE_STATIC ($$) = 1; }
917 | SCSPEC
918 { $$ = tree_cons (NULL_TREE, $1, NULL_TREE); }
919 | declmods_no_prefix_attr TYPE_QUAL
920 { $$ = tree_cons (NULL_TREE, $2, $1);
921 TREE_STATIC ($$) = 1; }
922 | declmods_no_prefix_attr SCSPEC
923 { if (extra_warnings && TREE_STATIC ($1))
924 warning ("`%s' is not at beginning of declaration",
925 IDENTIFIER_POINTER ($2));
926 $$ = tree_cons (NULL_TREE, $2, $1);
927 TREE_STATIC ($$) = TREE_STATIC ($1); }
928 ;
931 /* Used instead of declspecs where storage classes are not allowed
932 (that is, for typenames and structure components).
933 Don't accept a typedef-name if anything but a modifier precedes it. */
935 typed_typespecs:
936 typespec reserved_typespecquals
937 { $$ = tree_cons (NULL_TREE, $1, $2); }
938 | nonempty_type_quals typespec reserved_typespecquals
939 { $$ = chainon ($3, tree_cons (NULL_TREE, $2, $1)); }
940 ;
942 reserved_typespecquals: /* empty */
943 { $$ = NULL_TREE; }
944 | reserved_typespecquals typespecqual_reserved
945 { $$ = tree_cons (NULL_TREE, $2, $1); }
946 ;
948 /* A typespec (but not a type qualifier).
949 Once we have seen one of these in a declaration,
950 if a typedef name appears then it is being redeclared. */
952 typespec: TYPESPEC
953 | structsp
954 | TYPENAME
955 { /* For a typedef name, record the meaning, not the name.
956 In case of `foo foo, bar;'. */
957 $$ = lookup_name ($1); }
958 ifobjc
959 | CLASSNAME protocolrefs
960 { $$ = get_static_reference ($1, $2); }
961 | OBJECTNAME protocolrefs
962 { $$ = get_object_reference ($2); }
964 /* Make "<SomeProtocol>" equivalent to "id <SomeProtocol>"
965 - nisse@lysator.liu.se */
966 | non_empty_protocolrefs
967 { $$ = get_object_reference ($1); }
968 end ifobjc
969 | TYPEOF '(' expr ')'
970 { $$ = TREE_TYPE ($3); }
971 | TYPEOF '(' typename ')'
972 { $$ = groktypename ($3); }
973 ;
975 /* A typespec that is a reserved word, or a type qualifier. */
977 typespecqual_reserved: TYPESPEC
978 | TYPE_QUAL
979 | structsp
980 ;
982 initdecls:
983 initdcl
984 | initdecls ',' initdcl
985 ;
987 notype_initdecls:
988 notype_initdcl
989 | notype_initdecls ',' initdcl
990 ;
992 maybeasm:
993 /* empty */
994 { $$ = NULL_TREE; }
995 | ASM_KEYWORD '(' string ')'
996 { if (TREE_CHAIN ($3)) $3 = combine_strings ($3);
997 $$ = $3;
998 }
999 ;
1001 initdcl:
1002 declarator maybeasm maybe_attribute '='
1003 { $<ttype>$ = start_decl ($1, current_declspecs, 1,
1004 $3, prefix_attributes);
1005 start_init ($<ttype>$, $2, global_bindings_p ()); }
1006 init
1007 /* Note how the declaration of the variable is in effect while its init is parsed! */
1008 { finish_init ();
1009 finish_decl ($<ttype>5, $6, $2); }
1010 | declarator maybeasm maybe_attribute
1011 { tree d = start_decl ($1, current_declspecs, 0,
1012 $3, prefix_attributes);
1013 finish_decl (d, NULL_TREE, $2);
1014 }
1015 ;
1017 notype_initdcl:
1018 notype_declarator maybeasm maybe_attribute '='
1019 { $<ttype>$ = start_decl ($1, current_declspecs, 1,
1020 $3, prefix_attributes);
1021 start_init ($<ttype>$, $2, global_bindings_p ()); }
1022 init
1023 /* Note how the declaration of the variable is in effect while its init is parsed! */
1024 { finish_init ();
1025 decl_attributes ($<ttype>5, $3, prefix_attributes);
1026 finish_decl ($<ttype>5, $6, $2); }
1027 | notype_declarator maybeasm maybe_attribute
1028 { tree d = start_decl ($1, current_declspecs, 0,
1029 $3, prefix_attributes);
1030 finish_decl (d, NULL_TREE, $2); }
1031 ;
1032 /* the * rules are dummies to accept the Apollo extended syntax
1033 so that the header files compile. */
1034 maybe_attribute:
1035 /* empty */
1036 { $$ = NULL_TREE; }
1037 | attributes
1038 { $$ = $1; }
1039 ;
1041 attributes:
1042 attribute
1043 { $$ = $1; }
1044 | attributes attribute
1045 { $$ = chainon ($1, $2); }
1046 ;
1048 attribute:
1049 ATTRIBUTE '(' '(' attribute_list ')' ')'
1050 { $$ = $4; }
1051 ;
1053 attribute_list:
1054 attrib
1055 { $$ = $1; }
1056 | attribute_list ',' attrib
1057 { $$ = chainon ($1, $3); }
1058 ;
1060 attrib:
1061 /* empty */
1062 { $$ = NULL_TREE; }
1063 | any_word
1064 { $$ = build_tree_list ($1, NULL_TREE); }
1065 | any_word '(' IDENTIFIER ')'
1066 { $$ = build_tree_list ($1, build_tree_list (NULL_TREE, $3)); }
1067 | any_word '(' IDENTIFIER ',' nonnull_exprlist ')'
1068 { $$ = build_tree_list ($1, tree_cons (NULL_TREE, $3, $5)); }
1069 | any_word '(' exprlist ')'
1070 { $$ = build_tree_list ($1, $3); }
1071 ;
1073 /* This still leaves out most reserved keywords,
1074 shouldn't we include them? */
1076 any_word:
1077 identifier
1078 | SCSPEC
1079 | TYPESPEC
1080 | TYPE_QUAL
1081 ;
1082 \f
1083 /* Initializers. `init' is the entry point. */
1085 init:
1086 expr_no_commas
1087 | '{'
1088 { really_start_incremental_init (NULL_TREE); }
1089 initlist_maybe_comma '}'
1090 { $$ = pop_init_level (0); }
1091 | error
1092 { $$ = error_mark_node; }
1093 ;
1095 /* `initlist_maybe_comma' is the guts of an initializer in braces. */
1096 initlist_maybe_comma:
1097 /* empty */
1098 { if (pedantic)
1099 pedwarn ("ANSI C forbids empty initializer braces"); }
1100 | initlist1 maybecomma
1101 ;
1103 initlist1:
1104 initelt
1105 | initlist1 ',' initelt
1106 ;
1108 /* `initelt' is a single element of an initializer.
1109 It may use braces. */
1110 initelt:
1111 designator_list '=' initval
1112 | designator initval
1113 | identifier ':'
1114 { set_init_label ($1); }
1115 initval
1116 | initval
1117 ;
1119 initval:
1120 '{'
1121 { push_init_level (0); }
1122 initlist_maybe_comma '}'
1123 { process_init_element (pop_init_level (0)); }
1124 | expr_no_commas
1125 { process_init_element ($1); }
1126 | error
1127 ;
1129 designator_list:
1130 designator
1131 | designator_list designator
1132 ;
1134 designator:
1135 '.' identifier
1136 { set_init_label ($2); }
1137 /* These are for labeled elements. The syntax for an array element
1138 initializer conflicts with the syntax for an Objective-C message,
1139 so don't include these productions in the Objective-C grammar. */
1140 ifc
1141 | '[' expr_no_commas ELLIPSIS expr_no_commas ']'
1142 { set_init_index ($2, $4); }
1143 | '[' expr_no_commas ']'
1144 { set_init_index ($2, NULL_TREE); }
1145 end ifc
1146 ;
1147 \f
1148 nested_function:
1149 declarator
1150 { if (pedantic)
1151 pedwarn ("ANSI C forbids nested functions");
1153 push_function_context ();
1154 if (! start_function (current_declspecs, $1,
1155 prefix_attributes, NULL_TREE))
1156 {
1157 pop_function_context ();
1158 YYERROR1;
1159 }
1160 reinit_parse_for_function (); }
1161 old_style_parm_decls
1162 { store_parm_decls (); }
1163 /* This used to use compstmt_or_error.
1164 That caused a bug with input `f(g) int g {}',
1165 where the use of YYERROR1 above caused an error
1166 which then was handled by compstmt_or_error.
1167 There followed a repeated execution of that same rule,
1168 which called YYERROR1 again, and so on. */
1169 compstmt
1170 { finish_function (1);
1171 pop_function_context (); }
1172 ;
1174 notype_nested_function:
1175 notype_declarator
1176 { if (pedantic)
1177 pedwarn ("ANSI C forbids nested functions");
1179 push_function_context ();
1180 if (! start_function (current_declspecs, $1,
1181 prefix_attributes, NULL_TREE))
1182 {
1183 pop_function_context ();
1184 YYERROR1;
1185 }
1186 reinit_parse_for_function (); }
1187 old_style_parm_decls
1188 { store_parm_decls (); }
1189 /* This used to use compstmt_or_error.
1190 That caused a bug with input `f(g) int g {}',
1191 where the use of YYERROR1 above caused an error
1192 which then was handled by compstmt_or_error.
1193 There followed a repeated execution of that same rule,
1194 which called YYERROR1 again, and so on. */
1195 compstmt
1196 { finish_function (1);
1197 pop_function_context (); }
1198 ;
1200 /* Any kind of declarator (thus, all declarators allowed
1201 after an explicit typespec). */
1203 declarator:
1204 after_type_declarator
1205 | notype_declarator
1206 ;
1208 /* A declarator that is allowed only after an explicit typespec. */
1210 after_type_declarator:
1211 '(' after_type_declarator ')'
1212 { $$ = $2; }
1213 | after_type_declarator '(' parmlist_or_identifiers %prec '.'
1214 { $$ = build_nt (CALL_EXPR, $1, $3, NULL_TREE); }
1215 /* | after_type_declarator '(' error ')' %prec '.'
1216 { $$ = build_nt (CALL_EXPR, $1, NULL_TREE, NULL_TREE);
1217 poplevel (0, 0, 0); } */
1218 | after_type_declarator '[' expr ']' %prec '.'
1219 { $$ = build_nt (ARRAY_REF, $1, $3); }
1220 | after_type_declarator '[' ']' %prec '.'
1221 { $$ = build_nt (ARRAY_REF, $1, NULL_TREE); }
1222 | '*' type_quals after_type_declarator %prec UNARY
1223 { $$ = make_pointer_declarator ($2, $3); }
1224 /* ??? Yuck. setattrs is a quick hack. We can't use
1225 prefix_attributes because $1 only applies to this
1226 declarator. We assume setspecs has already been done.
1227 setattrs also avoids 5 reduce/reduce conflicts (otherwise multiple
1228 attributes could be recognized here or in `attributes'). */
1229 | attributes setattrs after_type_declarator
1230 { $$ = $3; }
1231 | TYPENAME
1232 ifobjc
1233 | OBJECTNAME
1234 end ifobjc
1235 ;
1237 /* Kinds of declarator that can appear in a parameter list
1238 in addition to notype_declarator. This is like after_type_declarator
1239 but does not allow a typedef name in parentheses as an identifier
1240 (because it would conflict with a function with that typedef as arg). */
1242 parm_declarator:
1243 parm_declarator '(' parmlist_or_identifiers %prec '.'
1244 { $$ = build_nt (CALL_EXPR, $1, $3, NULL_TREE); }
1245 /* | parm_declarator '(' error ')' %prec '.'
1246 { $$ = build_nt (CALL_EXPR, $1, NULL_TREE, NULL_TREE);
1247 poplevel (0, 0, 0); } */
1248 ifc
1249 | parm_declarator '[' '*' ']' %prec '.'
1250 { $$ = build_nt (ARRAY_REF, $1, NULL_TREE);
1251 if (! flag_isoc99)
1252 error ("`[*]' in parameter declaration only allowed in ISO C 99");
1253 }
1254 end ifc
1255 | parm_declarator '[' expr ']' %prec '.'
1256 { $$ = build_nt (ARRAY_REF, $1, $3); }
1257 | parm_declarator '[' ']' %prec '.'
1258 { $$ = build_nt (ARRAY_REF, $1, NULL_TREE); }
1259 | '*' type_quals parm_declarator %prec UNARY
1260 { $$ = make_pointer_declarator ($2, $3); }
1261 /* ??? Yuck. setattrs is a quick hack. We can't use
1262 prefix_attributes because $1 only applies to this
1263 declarator. We assume setspecs has already been done.
1264 setattrs also avoids 5 reduce/reduce conflicts (otherwise multiple
1265 attributes could be recognized here or in `attributes'). */
1266 | attributes setattrs parm_declarator
1267 { $$ = $3; }
1268 | TYPENAME
1269 ;
1271 /* A declarator allowed whether or not there has been
1272 an explicit typespec. These cannot redeclare a typedef-name. */
1274 notype_declarator:
1275 notype_declarator '(' parmlist_or_identifiers %prec '.'
1276 { $$ = build_nt (CALL_EXPR, $1, $3, NULL_TREE); }
1277 /* | notype_declarator '(' error ')' %prec '.'
1278 { $$ = build_nt (CALL_EXPR, $1, NULL_TREE, NULL_TREE);
1279 poplevel (0, 0, 0); } */
1280 | '(' notype_declarator ')'
1281 { $$ = $2; }
1282 | '*' type_quals notype_declarator %prec UNARY
1283 { $$ = make_pointer_declarator ($2, $3); }
1284 ifc
1285 | notype_declarator '[' '*' ']' %prec '.'
1286 { $$ = build_nt (ARRAY_REF, $1, NULL_TREE);
1287 if (! flag_isoc99)
1288 error ("`[*]' in parameter declaration only allowed in ISO C 99");
1289 }
1290 end ifc
1291 | notype_declarator '[' expr ']' %prec '.'
1292 { $$ = build_nt (ARRAY_REF, $1, $3); }
1293 | notype_declarator '[' ']' %prec '.'
1294 { $$ = build_nt (ARRAY_REF, $1, NULL_TREE); }
1295 /* ??? Yuck. setattrs is a quick hack. We can't use
1296 prefix_attributes because $1 only applies to this
1297 declarator. We assume setspecs has already been done.
1298 setattrs also avoids 5 reduce/reduce conflicts (otherwise multiple
1299 attributes could be recognized here or in `attributes'). */
1300 | attributes setattrs notype_declarator
1301 { $$ = $3; }
1302 | IDENTIFIER
1303 ;
1305 struct_head:
1306 STRUCT
1307 { $$ = NULL_TREE; }
1308 | STRUCT attributes
1309 { $$ = $2; }
1310 ;
1312 union_head:
1313 UNION
1314 { $$ = NULL_TREE; }
1315 | UNION attributes
1316 { $$ = $2; }
1317 ;
1319 enum_head:
1320 ENUM
1321 { $$ = NULL_TREE; }
1322 | ENUM attributes
1323 { $$ = $2; }
1324 ;
1326 structsp:
1327 struct_head identifier '{'
1328 { $$ = start_struct (RECORD_TYPE, $2);
1329 /* Start scope of tag before parsing components. */
1330 }
1331 component_decl_list '}' maybe_attribute
1332 { $$ = finish_struct ($<ttype>4, $5, chainon ($1, $7)); }
1333 | struct_head '{' component_decl_list '}' maybe_attribute
1334 { $$ = finish_struct (start_struct (RECORD_TYPE, NULL_TREE),
1335 $3, chainon ($1, $5));
1336 }
1337 | struct_head identifier
1338 { $$ = xref_tag (RECORD_TYPE, $2); }
1339 | union_head identifier '{'
1340 { $$ = start_struct (UNION_TYPE, $2); }
1341 component_decl_list '}' maybe_attribute
1342 { $$ = finish_struct ($<ttype>4, $5, chainon ($1, $7)); }
1343 | union_head '{' component_decl_list '}' maybe_attribute
1344 { $$ = finish_struct (start_struct (UNION_TYPE, NULL_TREE),
1345 $3, chainon ($1, $5));
1346 }
1347 | union_head identifier
1348 { $$ = xref_tag (UNION_TYPE, $2); }
1349 | enum_head identifier '{'
1350 { $$ = start_enum ($2); }
1351 enumlist maybecomma_warn '}' maybe_attribute
1352 { $$ = finish_enum ($<ttype>4, nreverse ($5),
1353 chainon ($1, $8)); }
1354 | enum_head '{'
1355 { $$ = start_enum (NULL_TREE); }
1356 enumlist maybecomma_warn '}' maybe_attribute
1357 { $$ = finish_enum ($<ttype>3, nreverse ($4),
1358 chainon ($1, $7)); }
1359 | enum_head identifier
1360 { $$ = xref_tag (ENUMERAL_TYPE, $2); }
1361 ;
1363 maybecomma:
1364 /* empty */
1365 | ','
1366 ;
1368 maybecomma_warn:
1369 /* empty */
1370 | ','
1371 { if (pedantic && ! flag_isoc99)
1372 pedwarn ("comma at end of enumerator list"); }
1373 ;
1375 component_decl_list:
1376 component_decl_list2
1377 { $$ = $1; }
1378 | component_decl_list2 component_decl
1379 { $$ = chainon ($1, $2);
1380 pedwarn ("no semicolon at end of struct or union"); }
1381 ;
1383 component_decl_list2: /* empty */
1384 { $$ = NULL_TREE; }
1385 | component_decl_list2 component_decl ';'
1386 { $$ = chainon ($1, $2); }
1387 | component_decl_list2 ';'
1388 { if (pedantic)
1389 pedwarn ("extra semicolon in struct or union specified"); }
1390 ifobjc
1391 /* foo(sizeof(struct{ @defs(ClassName)})); */
1392 | DEFS '(' CLASSNAME ')'
1393 {
1394 tree interface = lookup_interface ($3);
1396 if (interface)
1397 $$ = get_class_ivars (interface);
1398 else
1399 {
1400 error ("Cannot find interface declaration for `%s'",
1401 IDENTIFIER_POINTER ($3));
1402 $$ = NULL_TREE;
1403 }
1404 }
1405 end ifobjc
1406 ;
1408 /* There is a shift-reduce conflict here, because `components' may
1409 start with a `typename'. It happens that shifting (the default resolution)
1410 does the right thing, because it treats the `typename' as part of
1411 a `typed_typespecs'.
1413 It is possible that this same technique would allow the distinction
1414 between `notype_initdecls' and `initdecls' to be eliminated.
1415 But I am being cautious and not trying it. */
1417 component_decl:
1418 typed_typespecs setspecs components
1419 { $$ = $3;
1420 current_declspecs = TREE_VALUE (declspec_stack);
1421 prefix_attributes = TREE_PURPOSE (declspec_stack);
1422 declspec_stack = TREE_CHAIN (declspec_stack); }
1423 | typed_typespecs setspecs save_filename save_lineno maybe_attribute
1424 {
1425 /* Support for unnamed structs or unions as members of
1426 structs or unions (which is [a] useful and [b] supports
1427 MS P-SDK). */
1428 if (pedantic)
1429 pedwarn ("ANSI C doesn't support unnamed structs/unions");
1431 $$ = grokfield($3, $4, NULL, current_declspecs, NULL_TREE);
1432 current_declspecs = TREE_VALUE (declspec_stack);
1433 prefix_attributes = TREE_PURPOSE (declspec_stack);
1434 declspec_stack = TREE_CHAIN (declspec_stack);
1435 }
1436 | nonempty_type_quals setspecs components
1437 { $$ = $3;
1438 current_declspecs = TREE_VALUE (declspec_stack);
1439 prefix_attributes = TREE_PURPOSE (declspec_stack);
1440 declspec_stack = TREE_CHAIN (declspec_stack); }
1441 | nonempty_type_quals
1442 { if (pedantic)
1443 pedwarn ("ANSI C forbids member declarations with no members");
1444 shadow_tag($1);
1445 $$ = NULL_TREE; }
1446 | error
1447 { $$ = NULL_TREE; }
1448 | extension component_decl
1449 { $$ = $2;
1450 RESTORE_WARN_FLAGS ($1); }
1451 ;
1453 components:
1454 component_declarator
1455 | components ',' component_declarator
1456 { $$ = chainon ($1, $3); }
1457 ;
1459 component_declarator:
1460 save_filename save_lineno declarator maybe_attribute
1461 { $$ = grokfield ($1, $2, $3, current_declspecs, NULL_TREE);
1462 decl_attributes ($$, $4, prefix_attributes); }
1463 | save_filename save_lineno
1464 declarator ':' expr_no_commas maybe_attribute
1465 { $$ = grokfield ($1, $2, $3, current_declspecs, $5);
1466 decl_attributes ($$, $6, prefix_attributes); }
1467 | save_filename save_lineno ':' expr_no_commas maybe_attribute
1468 { $$ = grokfield ($1, $2, NULL_TREE, current_declspecs, $4);
1469 decl_attributes ($$, $5, prefix_attributes); }
1470 ;
1472 /* We chain the enumerators in reverse order.
1473 They are put in forward order where enumlist is used.
1474 (The order used to be significant, but no longer is so.
1475 However, we still maintain the order, just to be clean.) */
1477 enumlist:
1478 enumerator
1479 | enumlist ',' enumerator
1480 { if ($1 == error_mark_node)
1481 $$ = $1;
1482 else
1483 $$ = chainon ($3, $1); }
1484 | error
1485 { $$ = error_mark_node; }
1486 ;
1489 enumerator:
1490 identifier
1491 { $$ = build_enumerator ($1, NULL_TREE); }
1492 | identifier '=' expr_no_commas
1493 { $$ = build_enumerator ($1, $3); }
1494 ;
1496 typename:
1497 typed_typespecs absdcl
1498 { $$ = build_tree_list ($1, $2); }
1499 | nonempty_type_quals absdcl
1500 { $$ = build_tree_list ($1, $2); }
1501 ;
1503 absdcl: /* an absolute declarator */
1504 /* empty */
1505 { $$ = NULL_TREE; }
1506 | absdcl1
1507 ;
1509 nonempty_type_quals:
1510 TYPE_QUAL
1511 { $$ = tree_cons (NULL_TREE, $1, NULL_TREE); }
1512 | nonempty_type_quals TYPE_QUAL
1513 { $$ = tree_cons (NULL_TREE, $2, $1); }
1514 ;
1516 type_quals:
1517 /* empty */
1518 { $$ = NULL_TREE; }
1519 | type_quals TYPE_QUAL
1520 { $$ = tree_cons (NULL_TREE, $2, $1); }
1521 ;
1523 absdcl1: /* a nonempty absolute declarator */
1524 '(' absdcl1 ')'
1525 { $$ = $2; }
1526 /* `(typedef)1' is `int'. */
1527 | '*' type_quals absdcl1 %prec UNARY
1528 { $$ = make_pointer_declarator ($2, $3); }
1529 | '*' type_quals %prec UNARY
1530 { $$ = make_pointer_declarator ($2, NULL_TREE); }
1531 | absdcl1 '(' parmlist %prec '.'
1532 { $$ = build_nt (CALL_EXPR, $1, $3, NULL_TREE); }
1533 | absdcl1 '[' expr ']' %prec '.'
1534 { $$ = build_nt (ARRAY_REF, $1, $3); }
1535 | absdcl1 '[' ']' %prec '.'
1536 { $$ = build_nt (ARRAY_REF, $1, NULL_TREE); }
1537 | '(' parmlist %prec '.'
1538 { $$ = build_nt (CALL_EXPR, NULL_TREE, $2, NULL_TREE); }
1539 | '[' expr ']' %prec '.'
1540 { $$ = build_nt (ARRAY_REF, NULL_TREE, $2); }
1541 | '[' ']' %prec '.'
1542 { $$ = build_nt (ARRAY_REF, NULL_TREE, NULL_TREE); }
1543 /* ??? It appears we have to support attributes here, however
1544 using prefix_attributes is wrong. */
1545 | attributes setattrs absdcl1
1546 { $$ = $3; }
1547 ;
1549 /* at least one statement, the first of which parses without error. */
1550 /* stmts is used only after decls, so an invalid first statement
1551 is actually regarded as an invalid decl and part of the decls. */
1553 stmts:
1554 lineno_stmt_or_labels
1555 {
1556 if (pedantic && $1)
1557 pedwarn ("ANSI C forbids label at end of compound statement");
1558 }
1559 ;
1561 lineno_stmt_or_labels:
1562 lineno_stmt_or_label
1563 | lineno_stmt_or_labels lineno_stmt_or_label
1564 { $$ = $2; }
1565 | lineno_stmt_or_labels errstmt
1566 { $$ = 0; }
1567 ;
1569 xstmts:
1570 /* empty */
1571 | stmts
1572 ;
1574 errstmt: error ';'
1575 ;
1577 pushlevel: /* empty */
1578 { emit_line_note (input_filename, lineno);
1579 pushlevel (0);
1580 clear_last_expr ();
1581 expand_start_bindings (0);
1582 ifobjc
1583 if (objc_method_context)
1584 add_objc_decls ();
1585 end ifobjc
1586 }
1587 ;
1589 /* Read zero or more forward-declarations for labels
1590 that nested functions can jump to. */
1591 maybe_label_decls:
1592 /* empty */
1593 | label_decls
1594 { if (pedantic)
1595 pedwarn ("ANSI C forbids label declarations"); }
1596 ;
1598 label_decls:
1599 label_decl
1600 | label_decls label_decl
1601 ;
1603 label_decl:
1604 LABEL identifiers_or_typenames ';'
1605 { tree link;
1606 for (link = $2; link; link = TREE_CHAIN (link))
1607 {
1608 tree label = shadow_label (TREE_VALUE (link));
1609 C_DECLARED_LABEL_FLAG (label) = 1;
1610 declare_nonlocal_label (label);
1611 }
1612 }
1613 ;
1615 /* This is the body of a function definition.
1616 It causes syntax errors to ignore to the next openbrace. */
1617 compstmt_or_error:
1618 compstmt
1619 {}
1620 | error compstmt
1621 ;
1623 compstmt_start: '{' { compstmt_count++; }
1625 compstmt_nostart: '}'
1626 { $$ = convert (void_type_node, integer_zero_node); }
1627 | pushlevel maybe_label_decls decls xstmts '}'
1628 { emit_line_note (input_filename, lineno);
1629 expand_end_bindings (getdecls (), 1, 0);
1630 $$ = poplevel (1, 1, 0); }
1631 | pushlevel maybe_label_decls error '}'
1632 { emit_line_note (input_filename, lineno);
1633 expand_end_bindings (getdecls (), kept_level_p (), 0);
1634 $$ = poplevel (kept_level_p (), 0, 0); }
1635 | pushlevel maybe_label_decls stmts '}'
1636 { emit_line_note (input_filename, lineno);
1637 expand_end_bindings (getdecls (), kept_level_p (), 0);
1638 $$ = poplevel (kept_level_p (), 0, 0); }
1639 ;
1641 compstmt_primary_start:
1642 '(' '{'
1643 { if (current_function_decl == 0)
1644 {
1645 error ("braced-group within expression allowed only inside a function");
1646 YYERROR;
1647 }
1648 /* We must force a BLOCK for this level
1649 so that, if it is not expanded later,
1650 there is a way to turn off the entire subtree of blocks
1651 that are contained in it. */
1652 keep_next_level ();
1653 push_iterator_stack ();
1654 push_label_level ();
1655 $$ = expand_start_stmt_expr ();
1656 compstmt_count++;
1657 }
1659 compstmt: compstmt_start compstmt_nostart
1660 { $$ = $2; }
1661 ;
1663 /* Value is number of statements counted as of the closeparen. */
1664 simple_if:
1665 if_prefix lineno_labeled_stmt
1666 /* Make sure c_expand_end_cond is run once
1667 for each call to c_expand_start_cond.
1668 Otherwise a crash is likely. */
1669 | if_prefix error
1670 ;
1672 if_prefix:
1673 IF '(' expr ')'
1674 { emit_line_note ($<filename>-1, $<lineno>0);
1675 c_expand_start_cond (truthvalue_conversion ($3), 0,
1676 compstmt_count);
1677 $<itype>$ = stmt_count;
1678 if_stmt_file = $<filename>-1;
1679 if_stmt_line = $<lineno>0;
1680 position_after_white_space (); }
1681 ;
1683 /* This is a subroutine of stmt.
1684 It is used twice, once for valid DO statements
1685 and once for catching errors in parsing the end test. */
1686 do_stmt_start:
1687 DO
1688 { stmt_count++;
1689 compstmt_count++;
1690 emit_line_note ($<filename>-1, $<lineno>0);
1691 /* See comment in `while' alternative, above. */
1692 emit_nop ();
1693 expand_start_loop_continue_elsewhere (1);
1694 position_after_white_space (); }
1695 lineno_labeled_stmt WHILE
1696 { expand_loop_continue_here (); }
1697 ;
1699 save_filename:
1700 { $$ = input_filename; }
1701 ;
1703 save_lineno:
1704 { $$ = lineno; }
1705 ;
1707 lineno_labeled_stmt:
1708 save_filename save_lineno stmt
1709 { }
1710 /* | save_filename save_lineno error
1711 { }
1712 */
1713 | save_filename save_lineno label lineno_labeled_stmt
1714 { }
1715 ;
1717 lineno_stmt_or_label:
1718 save_filename save_lineno stmt_or_label
1719 { $$ = $3; }
1720 ;
1722 stmt_or_label:
1723 stmt
1724 { $$ = 0; }
1725 | label
1726 { $$ = 1; }
1727 ;
1729 /* Parse a single real statement, not including any labels. */
1730 stmt:
1731 compstmt
1732 { stmt_count++; }
1733 | all_iter_stmt
1734 | expr ';'
1735 { stmt_count++;
1736 emit_line_note ($<filename>-1, $<lineno>0);
1737 /* It appears that this should not be done--that a non-lvalue array
1738 shouldn't get an error if the value isn't used.
1739 Section 3.2.2.1 says that an array lvalue gets converted to a pointer
1740 if it appears as a top-level expression,
1741 but says nothing about non-lvalue arrays. */
1742 #if 0
1743 /* Call default_conversion to get an error
1744 on referring to a register array if pedantic. */
1745 if (TREE_CODE (TREE_TYPE ($1)) == ARRAY_TYPE
1746 || TREE_CODE (TREE_TYPE ($1)) == FUNCTION_TYPE)
1747 $1 = default_conversion ($1);
1748 #endif
1749 iterator_expand ($1); }
1750 | simple_if ELSE
1751 { c_expand_start_else ();
1752 $<itype>1 = stmt_count;
1753 position_after_white_space (); }
1754 lineno_labeled_stmt
1755 { c_expand_end_cond ();
1756 if (extra_warnings && stmt_count == $<itype>1)
1757 warning ("empty body in an else-statement"); }
1758 | simple_if %prec IF
1759 { c_expand_end_cond ();
1760 /* This warning is here instead of in simple_if, because we
1761 do not want a warning if an empty if is followed by an
1762 else statement. Increment stmt_count so we don't
1763 give a second error if this is a nested `if'. */
1764 if (extra_warnings && stmt_count++ == $<itype>1)
1765 warning_with_file_and_line (if_stmt_file, if_stmt_line,
1766 "empty body in an if-statement"); }
1767 /* Make sure c_expand_end_cond is run once
1768 for each call to c_expand_start_cond.
1769 Otherwise a crash is likely. */
1770 | simple_if ELSE error
1771 { c_expand_end_cond (); }
1772 | WHILE
1773 { stmt_count++;
1774 emit_line_note ($<filename>-1, $<lineno>0);
1775 /* The emit_nop used to come before emit_line_note,
1776 but that made the nop seem like part of the preceding line.
1777 And that was confusing when the preceding line was
1778 inside of an if statement and was not really executed.
1779 I think it ought to work to put the nop after the line number.
1780 We will see. --rms, July 15, 1991. */
1781 emit_nop (); }
1782 '(' expr ')'
1783 { /* Don't start the loop till we have succeeded
1784 in parsing the end test. This is to make sure
1785 that we end every loop we start. */
1786 expand_start_loop (1);
1787 emit_line_note (input_filename, lineno);
1788 expand_exit_loop_if_false (NULL_PTR,
1789 truthvalue_conversion ($4));
1790 position_after_white_space (); }
1791 lineno_labeled_stmt
1792 { expand_end_loop (); }
1793 | do_stmt_start
1794 '(' expr ')' ';'
1795 { emit_line_note (input_filename, lineno);
1796 expand_exit_loop_if_false (NULL_PTR,
1797 truthvalue_conversion ($3));
1798 expand_end_loop (); }
1799 /* This rule is needed to make sure we end every loop we start. */
1800 | do_stmt_start error
1801 { expand_end_loop (); }
1802 | FOR
1803 '(' xexpr ';'
1804 { stmt_count++;
1805 emit_line_note ($<filename>-1, $<lineno>0);
1806 /* See comment in `while' alternative, above. */
1807 emit_nop ();
1808 if ($3) c_expand_expr_stmt ($3);
1809 /* Next step is to call expand_start_loop_continue_elsewhere,
1810 but wait till after we parse the entire for (...).
1811 Otherwise, invalid input might cause us to call that
1812 fn without calling expand_end_loop. */
1813 }
1814 xexpr ';'
1815 /* Can't emit now; wait till after expand_start_loop... */
1816 { $<lineno>7 = lineno;
1817 $<filename>$ = input_filename; }
1818 xexpr ')'
1819 {
1820 /* Start the loop. Doing this after parsing
1821 all the expressions ensures we will end the loop. */
1822 expand_start_loop_continue_elsewhere (1);
1823 /* Emit the end-test, with a line number. */
1824 emit_line_note ($<filename>8, $<lineno>7);
1825 if ($6)
1826 expand_exit_loop_if_false (NULL_PTR,
1827 truthvalue_conversion ($6));
1828 $<lineno>7 = lineno;
1829 $<filename>8 = input_filename;
1830 position_after_white_space (); }
1831 lineno_labeled_stmt
1832 { /* Emit the increment expression, with a line number. */
1833 emit_line_note ($<filename>8, $<lineno>7);
1834 expand_loop_continue_here ();
1835 if ($9)
1836 c_expand_expr_stmt ($9);
1837 expand_end_loop (); }
1838 | SWITCH '(' expr ')'
1839 { stmt_count++;
1840 emit_line_note ($<filename>-1, $<lineno>0);
1841 c_expand_start_case ($3);
1842 position_after_white_space (); }
1843 lineno_labeled_stmt
1844 { expand_end_case ($3); }
1845 | BREAK ';'
1846 { stmt_count++;
1847 emit_line_note ($<filename>-1, $<lineno>0);
1848 if ( ! expand_exit_something ())
1849 error ("break statement not within loop or switch"); }
1850 | CONTINUE ';'
1851 { stmt_count++;
1852 emit_line_note ($<filename>-1, $<lineno>0);
1853 if (! expand_continue_loop (NULL_PTR))
1854 error ("continue statement not within a loop"); }
1855 | RETURN ';'
1856 { stmt_count++;
1857 emit_line_note ($<filename>-1, $<lineno>0);
1858 c_expand_return (NULL_TREE); }
1859 | RETURN expr ';'
1860 { stmt_count++;
1861 emit_line_note ($<filename>-1, $<lineno>0);
1862 c_expand_return ($2); }
1863 | ASM_KEYWORD maybe_type_qual '(' expr ')' ';'
1864 { stmt_count++;
1865 emit_line_note ($<filename>-1, $<lineno>0);
1866 STRIP_NOPS ($4);
1867 if ((TREE_CODE ($4) == ADDR_EXPR
1868 && TREE_CODE (TREE_OPERAND ($4, 0)) == STRING_CST)
1869 || TREE_CODE ($4) == STRING_CST)
1870 expand_asm ($4);
1871 else
1872 error ("argument of `asm' is not a constant string"); }
1873 /* This is the case with just output operands. */
1874 | ASM_KEYWORD maybe_type_qual '(' expr ':' asm_operands ')' ';'
1875 { stmt_count++;
1876 emit_line_note ($<filename>-1, $<lineno>0);
1877 c_expand_asm_operands ($4, $6, NULL_TREE, NULL_TREE,
1878 $2 == ridpointers[(int)RID_VOLATILE],
1879 input_filename, lineno); }
1880 /* This is the case with input operands as well. */
1881 | ASM_KEYWORD maybe_type_qual '(' expr ':' asm_operands ':' asm_operands ')' ';'
1882 { stmt_count++;
1883 emit_line_note ($<filename>-1, $<lineno>0);
1884 c_expand_asm_operands ($4, $6, $8, NULL_TREE,
1885 $2 == ridpointers[(int)RID_VOLATILE],
1886 input_filename, lineno); }
1887 /* This is the case with clobbered registers as well. */
1888 | ASM_KEYWORD maybe_type_qual '(' expr ':' asm_operands ':'
1889 asm_operands ':' asm_clobbers ')' ';'
1890 { stmt_count++;
1891 emit_line_note ($<filename>-1, $<lineno>0);
1892 c_expand_asm_operands ($4, $6, $8, $10,
1893 $2 == ridpointers[(int)RID_VOLATILE],
1894 input_filename, lineno); }
1895 | GOTO identifier ';'
1896 { tree decl;
1897 stmt_count++;
1898 emit_line_note ($<filename>-1, $<lineno>0);
1899 decl = lookup_label ($2);
1900 if (decl != 0)
1901 {
1902 TREE_USED (decl) = 1;
1903 expand_goto (decl);
1904 }
1905 }
1906 | GOTO '*' expr ';'
1907 { if (pedantic)
1908 pedwarn ("ANSI C forbids `goto *expr;'");
1909 stmt_count++;
1910 emit_line_note ($<filename>-1, $<lineno>0);
1911 expand_computed_goto (convert (ptr_type_node, $3)); }
1912 | ';'
1913 ;
1915 all_iter_stmt:
1916 all_iter_stmt_simple
1917 /* | all_iter_stmt_with_decl */
1918 ;
1920 all_iter_stmt_simple:
1921 FOR '(' primary ')'
1922 {
1923 /* The value returned by this action is */
1924 /* 1 if everything is OK */
1925 /* 0 in case of error or already bound iterator */
1927 $<itype>$ = 0;
1928 if (TREE_CODE ($3) != VAR_DECL)
1929 error ("invalid `for (ITERATOR)' syntax");
1930 else if (! ITERATOR_P ($3))
1931 error ("`%s' is not an iterator",
1932 IDENTIFIER_POINTER (DECL_NAME ($3)));
1933 else if (ITERATOR_BOUND_P ($3))
1934 error ("`for (%s)' inside expansion of same iterator",
1935 IDENTIFIER_POINTER (DECL_NAME ($3)));
1936 else
1937 {
1938 $<itype>$ = 1;
1939 iterator_for_loop_start ($3);
1940 }
1941 }
1942 lineno_labeled_stmt
1943 {
1944 if ($<itype>5)
1945 iterator_for_loop_end ($3);
1946 }
1948 /* This really should allow any kind of declaration,
1949 for generality. Fix it before turning it back on.
1951 all_iter_stmt_with_decl:
1952 FOR '(' ITERATOR pushlevel setspecs iterator_spec ')'
1953 {
1954 */ /* The value returned by this action is */
1955 /* 1 if everything is OK */
1956 /* 0 in case of error or already bound iterator */
1957 /*
1958 iterator_for_loop_start ($6);
1959 }
1960 lineno_labeled_stmt
1961 {
1962 iterator_for_loop_end ($6);
1963 emit_line_note (input_filename, lineno);
1964 expand_end_bindings (getdecls (), 1, 0);
1965 $<ttype>$ = poplevel (1, 1, 0);
1966 }
1967 */
1969 /* Any kind of label, including jump labels and case labels.
1970 ANSI C accepts labels only before statements, but we allow them
1971 also at the end of a compound statement. */
1973 label: CASE expr_no_commas ':'
1974 { register tree value = check_case_value ($2);
1975 register tree label
1976 = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE);
1978 stmt_count++;
1980 if (value != error_mark_node)
1981 {
1982 tree duplicate;
1983 int success;
1985 if (pedantic && ! INTEGRAL_TYPE_P (TREE_TYPE (value)))
1986 pedwarn ("label must have integral type in ANSI C");
1988 success = pushcase (value, convert_and_check,
1989 label, &duplicate);
1991 if (success == 1)
1992 error ("case label not within a switch statement");
1993 else if (success == 2)
1994 {
1995 error ("duplicate case value");
1996 error_with_decl (duplicate, "this is the first entry for that value");
1997 }
1998 else if (success == 3)
1999 warning ("case value out of range");
2000 else if (success == 5)
2001 error ("case label within scope of cleanup or variable array");
2002 }
2003 position_after_white_space (); }
2004 | CASE expr_no_commas ELLIPSIS expr_no_commas ':'
2005 { register tree value1 = check_case_value ($2);
2006 register tree value2 = check_case_value ($4);
2007 register tree label
2008 = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE);
2010 if (pedantic)
2011 pedwarn ("ANSI C forbids case ranges");
2012 stmt_count++;
2014 if (value1 != error_mark_node && value2 != error_mark_node)
2015 {
2016 tree duplicate;
2017 int success = pushcase_range (value1, value2,
2018 convert_and_check, label,
2019 &duplicate);
2020 if (success == 1)
2021 error ("case label not within a switch statement");
2022 else if (success == 2)
2023 {
2024 error ("duplicate case value");
2025 error_with_decl (duplicate, "this is the first entry for that value");
2026 }
2027 else if (success == 3)
2028 warning ("case value out of range");
2029 else if (success == 4)
2030 warning ("empty case range");
2031 else if (success == 5)
2032 error ("case label within scope of cleanup or variable array");
2033 }
2034 position_after_white_space (); }
2035 | DEFAULT ':'
2036 {
2037 tree duplicate;
2038 register tree label
2039 = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE);
2040 int success = pushcase (NULL_TREE, 0, label, &duplicate);
2041 stmt_count++;
2042 if (success == 1)
2043 error ("default label not within a switch statement");
2044 else if (success == 2)
2045 {
2046 error ("multiple default labels in one switch");
2047 error_with_decl (duplicate, "this is the first default label");
2048 }
2049 position_after_white_space (); }
2050 | identifier ':' maybe_attribute
2051 { tree label = define_label (input_filename, lineno, $1);
2052 stmt_count++;
2053 emit_nop ();
2054 if (label)
2055 {
2056 expand_label (label);
2057 decl_attributes (label, $3, NULL_TREE);
2058 }
2059 position_after_white_space (); }
2060 ;
2062 /* Either a type-qualifier or nothing. First thing in an `asm' statement. */
2064 maybe_type_qual:
2065 /* empty */
2066 { emit_line_note (input_filename, lineno);
2067 $$ = NULL_TREE; }
2068 | TYPE_QUAL
2069 { emit_line_note (input_filename, lineno); }
2070 ;
2072 xexpr:
2073 /* empty */
2074 { $$ = NULL_TREE; }
2075 | expr
2076 ;
2078 /* These are the operands other than the first string and colon
2079 in asm ("addextend %2,%1": "=dm" (x), "0" (y), "g" (*x)) */
2080 asm_operands: /* empty */
2081 { $$ = NULL_TREE; }
2082 | nonnull_asm_operands
2083 ;
2085 nonnull_asm_operands:
2086 asm_operand
2087 | nonnull_asm_operands ',' asm_operand
2088 { $$ = chainon ($1, $3); }
2089 ;
2091 asm_operand:
2092 STRING '(' expr ')'
2093 { $$ = build_tree_list ($1, $3); }
2094 ;
2096 asm_clobbers:
2097 string
2098 { $$ = tree_cons (NULL_TREE, combine_strings ($1), NULL_TREE); }
2099 | asm_clobbers ',' string
2100 { $$ = tree_cons (NULL_TREE, combine_strings ($3), $1); }
2101 ;
2102 \f
2103 /* This is what appears inside the parens in a function declarator.
2104 Its value is a list of ..._TYPE nodes. */
2105 parmlist:
2106 { pushlevel (0);
2107 clear_parm_order ();
2108 declare_parm_level (0); }
2109 parmlist_1
2110 { $$ = $2;
2111 parmlist_tags_warning ();
2112 poplevel (0, 0, 0); }
2113 ;
2115 parmlist_1:
2116 parmlist_2 ')'
2117 | parms ';'
2118 { tree parm;
2119 if (pedantic)
2120 pedwarn ("ANSI C forbids forward parameter declarations");
2121 /* Mark the forward decls as such. */
2122 for (parm = getdecls (); parm; parm = TREE_CHAIN (parm))
2123 TREE_ASM_WRITTEN (parm) = 1;
2124 clear_parm_order (); }
2125 parmlist_1
2126 { $$ = $4; }
2127 | error ')'
2128 { $$ = tree_cons (NULL_TREE, NULL_TREE, NULL_TREE); }
2129 ;
2131 /* This is what appears inside the parens in a function declarator.
2132 Is value is represented in the format that grokdeclarator expects. */
2133 parmlist_2: /* empty */
2134 { $$ = get_parm_info (0); }
2135 | ELLIPSIS
2136 { $$ = get_parm_info (0);
2137 /* Gcc used to allow this as an extension. However, it does
2138 not work for all targets, and thus has been disabled.
2139 Also, since func (...) and func () are indistinguishable,
2140 it caused problems with the code in expand_builtin which
2141 tries to verify that BUILT_IN_NEXT_ARG is being used
2142 correctly. */
2143 error ("ANSI C requires a named argument before `...'");
2144 }
2145 | parms
2146 { $$ = get_parm_info (1); }
2147 | parms ',' ELLIPSIS
2148 { $$ = get_parm_info (0); }
2149 ;
2151 parms:
2152 parm
2153 { push_parm_decl ($1); }
2154 | parms ',' parm
2155 { push_parm_decl ($3); }
2156 ;
2158 /* A single parameter declaration or parameter type name,
2159 as found in a parmlist. */
2160 parm:
2161 typed_declspecs setspecs parm_declarator maybe_attribute
2162 { $$ = build_tree_list (build_tree_list (current_declspecs,
2163 $3),
2164 build_tree_list (prefix_attributes,
2165 $4));
2166 current_declspecs = TREE_VALUE (declspec_stack);
2167 prefix_attributes = TREE_PURPOSE (declspec_stack);
2168 declspec_stack = TREE_CHAIN (declspec_stack); }
2169 | typed_declspecs setspecs notype_declarator maybe_attribute
2170 { $$ = build_tree_list (build_tree_list (current_declspecs,
2171 $3),
2172 build_tree_list (prefix_attributes,
2173 $4));
2174 current_declspecs = TREE_VALUE (declspec_stack);
2175 prefix_attributes = TREE_PURPOSE (declspec_stack);
2176 declspec_stack = TREE_CHAIN (declspec_stack); }
2177 | typed_declspecs setspecs absdcl maybe_attribute
2178 { $$ = build_tree_list (build_tree_list (current_declspecs,
2179 $3),
2180 build_tree_list (prefix_attributes,
2181 $4));
2182 current_declspecs = TREE_VALUE (declspec_stack);
2183 prefix_attributes = TREE_PURPOSE (declspec_stack);
2184 declspec_stack = TREE_CHAIN (declspec_stack); }
2185 | declmods setspecs notype_declarator maybe_attribute
2186 { $$ = build_tree_list (build_tree_list (current_declspecs,
2187 $3),
2188 build_tree_list (prefix_attributes,
2189 $4));
2190 current_declspecs = TREE_VALUE (declspec_stack);
2191 prefix_attributes = TREE_PURPOSE (declspec_stack);
2192 declspec_stack = TREE_CHAIN (declspec_stack); }
2194 | declmods setspecs absdcl maybe_attribute
2195 { $$ = build_tree_list (build_tree_list (current_declspecs,
2196 $3),
2197 build_tree_list (prefix_attributes,
2198 $4));
2199 current_declspecs = TREE_VALUE (declspec_stack);
2200 prefix_attributes = TREE_PURPOSE (declspec_stack);
2201 declspec_stack = TREE_CHAIN (declspec_stack); }
2202 ;
2204 /* This is used in a function definition
2205 where either a parmlist or an identifier list is ok.
2206 Its value is a list of ..._TYPE nodes or a list of identifiers. */
2207 parmlist_or_identifiers:
2208 { pushlevel (0);
2209 clear_parm_order ();
2210 declare_parm_level (1); }
2211 parmlist_or_identifiers_1
2212 { $$ = $2;
2213 parmlist_tags_warning ();
2214 poplevel (0, 0, 0); }
2215 ;
2217 parmlist_or_identifiers_1:
2218 parmlist_1
2219 | identifiers ')'
2220 { tree t;
2221 for (t = $1; t; t = TREE_CHAIN (t))
2222 if (TREE_VALUE (t) == NULL_TREE)
2223 error ("`...' in old-style identifier list");
2224 $$ = tree_cons (NULL_TREE, NULL_TREE, $1); }
2225 ;
2227 /* A nonempty list of identifiers. */
2228 identifiers:
2229 IDENTIFIER
2230 { $$ = build_tree_list (NULL_TREE, $1); }
2231 | identifiers ',' IDENTIFIER
2232 { $$ = chainon ($1, build_tree_list (NULL_TREE, $3)); }
2233 ;
2235 /* A nonempty list of identifiers, including typenames. */
2236 identifiers_or_typenames:
2237 identifier
2238 { $$ = build_tree_list (NULL_TREE, $1); }
2239 | identifiers_or_typenames ',' identifier
2240 { $$ = chainon ($1, build_tree_list (NULL_TREE, $3)); }
2241 ;
2243 extension:
2244 EXTENSION
2245 { $$ = SAVE_WARN_FLAGS();
2246 pedantic = 0;
2247 warn_pointer_arith = 0; }
2248 ;
2249 \f
2250 ifobjc
2251 /* Objective-C productions. */
2253 objcdef:
2254 classdef
2255 | classdecl
2256 | aliasdecl
2257 | protocoldef
2258 | methoddef
2259 | END
2260 {
2261 if (objc_implementation_context)
2262 {
2263 finish_class (objc_implementation_context);
2264 objc_ivar_chain = NULL_TREE;
2265 objc_implementation_context = NULL_TREE;
2266 }
2267 else
2268 warning ("`@end' must appear in an implementation context");
2269 }
2270 ;
2272 /* A nonempty list of identifiers. */
2273 identifier_list:
2274 identifier
2275 { $$ = build_tree_list (NULL_TREE, $1); }
2276 | identifier_list ',' identifier
2277 { $$ = chainon ($1, build_tree_list (NULL_TREE, $3)); }
2278 ;
2280 classdecl:
2281 CLASS identifier_list ';'
2282 {
2283 objc_declare_class ($2);
2284 }
2286 aliasdecl:
2287 ALIAS identifier identifier ';'
2288 {
2289 objc_declare_alias ($2, $3);
2290 }
2292 classdef:
2293 INTERFACE identifier protocolrefs '{'
2294 {
2295 objc_interface_context = objc_ivar_context
2296 = start_class (CLASS_INTERFACE_TYPE, $2, NULL_TREE, $3);
2297 objc_public_flag = 0;
2298 }
2299 ivar_decl_list '}'
2300 {
2301 continue_class (objc_interface_context);
2302 }
2303 methodprotolist
2304 END
2305 {
2306 finish_class (objc_interface_context);
2307 objc_interface_context = NULL_TREE;
2308 }
2310 | INTERFACE identifier protocolrefs
2311 {
2312 objc_interface_context
2313 = start_class (CLASS_INTERFACE_TYPE, $2, NULL_TREE, $3);
2314 continue_class (objc_interface_context);
2315 }
2316 methodprotolist
2317 END
2318 {
2319 finish_class (objc_interface_context);
2320 objc_interface_context = NULL_TREE;
2321 }
2323 | INTERFACE identifier ':' identifier protocolrefs '{'
2324 {
2325 objc_interface_context = objc_ivar_context
2326 = start_class (CLASS_INTERFACE_TYPE, $2, $4, $5);
2327 objc_public_flag = 0;
2328 }
2329 ivar_decl_list '}'
2330 {
2331 continue_class (objc_interface_context);
2332 }
2333 methodprotolist
2334 END
2335 {
2336 finish_class (objc_interface_context);
2337 objc_interface_context = NULL_TREE;
2338 }
2340 | INTERFACE identifier ':' identifier protocolrefs
2341 {
2342 objc_interface_context
2343 = start_class (CLASS_INTERFACE_TYPE, $2, $4, $5);
2344 continue_class (objc_interface_context);
2345 }
2346 methodprotolist
2347 END
2348 {
2349 finish_class (objc_interface_context);
2350 objc_interface_context = NULL_TREE;
2351 }
2353 | IMPLEMENTATION identifier '{'
2354 {
2355 objc_implementation_context = objc_ivar_context
2356 = start_class (CLASS_IMPLEMENTATION_TYPE, $2, NULL_TREE, NULL_TREE);
2357 objc_public_flag = 0;
2358 }
2359 ivar_decl_list '}'
2360 {
2361 objc_ivar_chain
2362 = continue_class (objc_implementation_context);
2363 }
2365 | IMPLEMENTATION identifier
2366 {
2367 objc_implementation_context
2368 = start_class (CLASS_IMPLEMENTATION_TYPE, $2, NULL_TREE, NULL_TREE);
2369 objc_ivar_chain
2370 = continue_class (objc_implementation_context);
2371 }
2373 | IMPLEMENTATION identifier ':' identifier '{'
2374 {
2375 objc_implementation_context = objc_ivar_context
2376 = start_class (CLASS_IMPLEMENTATION_TYPE, $2, $4, NULL_TREE);
2377 objc_public_flag = 0;
2378 }
2379 ivar_decl_list '}'
2380 {
2381 objc_ivar_chain
2382 = continue_class (objc_implementation_context);
2383 }
2385 | IMPLEMENTATION identifier ':' identifier
2386 {
2387 objc_implementation_context
2388 = start_class (CLASS_IMPLEMENTATION_TYPE, $2, $4, NULL_TREE);
2389 objc_ivar_chain
2390 = continue_class (objc_implementation_context);
2391 }
2393 | INTERFACE identifier '(' identifier ')' protocolrefs
2394 {
2395 objc_interface_context
2396 = start_class (CATEGORY_INTERFACE_TYPE, $2, $4, $6);
2397 continue_class (objc_interface_context);
2398 }
2399 methodprotolist
2400 END
2401 {
2402 finish_class (objc_interface_context);
2403 objc_interface_context = NULL_TREE;
2404 }
2406 | IMPLEMENTATION identifier '(' identifier ')'
2407 {
2408 objc_implementation_context
2409 = start_class (CATEGORY_IMPLEMENTATION_TYPE, $2, $4, NULL_TREE);
2410 objc_ivar_chain
2411 = continue_class (objc_implementation_context);
2412 }
2413 ;
2415 protocoldef:
2416 PROTOCOL identifier protocolrefs
2417 {
2418 remember_protocol_qualifiers ();
2419 objc_interface_context
2420 = start_protocol(PROTOCOL_INTERFACE_TYPE, $2, $3);
2421 }
2422 methodprotolist END
2423 {
2424 forget_protocol_qualifiers();
2425 finish_protocol(objc_interface_context);
2426 objc_interface_context = NULL_TREE;
2427 }
2428 ;
2430 protocolrefs:
2431 /* empty */
2432 {
2433 $$ = NULL_TREE;
2434 }
2435 | non_empty_protocolrefs
2436 ;
2438 non_empty_protocolrefs:
2439 ARITHCOMPARE identifier_list ARITHCOMPARE
2440 {
2441 if ($1 == LT_EXPR && $3 == GT_EXPR)
2442 $$ = $2;
2443 else
2444 YYERROR1;
2445 }
2446 ;
2448 ivar_decl_list:
2449 ivar_decl_list visibility_spec ivar_decls
2450 | ivar_decls
2451 ;
2453 visibility_spec:
2454 PRIVATE { objc_public_flag = 2; }
2455 | PROTECTED { objc_public_flag = 0; }
2456 | PUBLIC { objc_public_flag = 1; }
2457 ;
2459 ivar_decls:
2460 /* empty */
2461 {
2462 $$ = NULL_TREE;
2463 }
2464 | ivar_decls ivar_decl ';'
2465 | ivar_decls ';'
2466 {
2467 if (pedantic)
2468 pedwarn ("extra semicolon in struct or union specified");
2469 }
2470 ;
2473 /* There is a shift-reduce conflict here, because `components' may
2474 start with a `typename'. It happens that shifting (the default resolution)
2475 does the right thing, because it treats the `typename' as part of
2476 a `typed_typespecs'.
2478 It is possible that this same technique would allow the distinction
2479 between `notype_initdecls' and `initdecls' to be eliminated.
2480 But I am being cautious and not trying it. */
2482 ivar_decl:
2483 typed_typespecs setspecs ivars
2484 { $$ = $3;
2485 current_declspecs = TREE_VALUE (declspec_stack);
2486 prefix_attributes = TREE_PURPOSE (declspec_stack);
2487 declspec_stack = TREE_CHAIN (declspec_stack); }
2488 | nonempty_type_quals setspecs ivars
2489 { $$ = $3;
2490 current_declspecs = TREE_VALUE (declspec_stack);
2491 prefix_attributes = TREE_PURPOSE (declspec_stack);
2492 declspec_stack = TREE_CHAIN (declspec_stack); }
2493 | error
2494 { $$ = NULL_TREE; }
2495 ;
2497 ivars:
2498 /* empty */
2499 { $$ = NULL_TREE; }
2500 | ivar_declarator
2501 | ivars ',' ivar_declarator
2502 ;
2504 ivar_declarator:
2505 declarator
2506 {
2507 $$ = add_instance_variable (objc_ivar_context,
2508 objc_public_flag,
2509 $1, current_declspecs,
2510 NULL_TREE);
2511 }
2512 | declarator ':' expr_no_commas
2513 {
2514 $$ = add_instance_variable (objc_ivar_context,
2515 objc_public_flag,
2516 $1, current_declspecs, $3);
2517 }
2518 | ':' expr_no_commas
2519 {
2520 $$ = add_instance_variable (objc_ivar_context,
2521 objc_public_flag,
2522 NULL_TREE,
2523 current_declspecs, $2);
2524 }
2525 ;
2527 methoddef:
2528 '+'
2529 {
2530 remember_protocol_qualifiers ();
2531 if (objc_implementation_context)
2532 objc_inherit_code = CLASS_METHOD_DECL;
2533 else
2534 fatal ("method definition not in class context");
2535 }
2536 methoddecl
2537 {
2538 forget_protocol_qualifiers ();
2539 add_class_method (objc_implementation_context, $3);
2540 start_method_def ($3);
2541 objc_method_context = $3;
2542 }
2543 optarglist
2544 {
2545 continue_method_def ();
2546 }
2547 compstmt_or_error
2548 {
2549 finish_method_def ();
2550 objc_method_context = NULL_TREE;
2551 }
2553 | '-'
2554 {
2555 remember_protocol_qualifiers ();
2556 if (objc_implementation_context)
2557 objc_inherit_code = INSTANCE_METHOD_DECL;
2558 else
2559 fatal ("method definition not in class context");
2560 }
2561 methoddecl
2562 {
2563 forget_protocol_qualifiers ();
2564 add_instance_method (objc_implementation_context, $3);
2565 start_method_def ($3);
2566 objc_method_context = $3;
2567 }
2568 optarglist
2569 {
2570 continue_method_def ();
2571 }
2572 compstmt_or_error
2573 {
2574 finish_method_def ();
2575 objc_method_context = NULL_TREE;
2576 }
2577 ;
2579 /* the reason for the strange actions in this rule
2580 is so that notype_initdecls when reached via datadef
2581 can find a valid list of type and sc specs in $0. */
2583 methodprotolist:
2584 /* empty */
2585 | {$<ttype>$ = NULL_TREE; } methodprotolist2
2586 ;
2588 methodprotolist2: /* eliminates a shift/reduce conflict */
2589 methodproto
2590 | datadef
2591 | methodprotolist2 methodproto
2592 | methodprotolist2 {$<ttype>$ = NULL_TREE; } datadef
2593 ;
2595 semi_or_error:
2596 ';'
2597 | error
2598 ;
2600 methodproto:
2601 '+'
2602 {
2603 /* Remember protocol qualifiers in prototypes. */
2604 remember_protocol_qualifiers ();
2605 objc_inherit_code = CLASS_METHOD_DECL;
2606 }
2607 methoddecl
2608 {
2609 /* Forget protocol qualifiers here. */
2610 forget_protocol_qualifiers ();
2611 add_class_method (objc_interface_context, $3);
2612 }
2613 semi_or_error
2615 | '-'
2616 {
2617 /* Remember protocol qualifiers in prototypes. */
2618 remember_protocol_qualifiers ();
2619 objc_inherit_code = INSTANCE_METHOD_DECL;
2620 }
2621 methoddecl
2622 {
2623 /* Forget protocol qualifiers here. */
2624 forget_protocol_qualifiers ();
2625 add_instance_method (objc_interface_context, $3);
2626 }
2627 semi_or_error
2628 ;
2630 methoddecl:
2631 '(' typename ')' unaryselector
2632 {
2633 $$ = build_method_decl (objc_inherit_code, $2, $4, NULL_TREE);
2634 }
2636 | unaryselector
2637 {
2638 $$ = build_method_decl (objc_inherit_code, NULL_TREE, $1, NULL_TREE);
2639 }
2641 | '(' typename ')' keywordselector optparmlist
2642 {
2643 $$ = build_method_decl (objc_inherit_code, $2, $4, $5);
2644 }
2646 | keywordselector optparmlist
2647 {
2648 $$ = build_method_decl (objc_inherit_code, NULL_TREE, $1, $2);
2649 }
2650 ;
2652 /* "optarglist" assumes that start_method_def has already been called...
2653 if it is not, the "xdecls" will not be placed in the proper scope */
2655 optarglist:
2656 /* empty */
2657 | ';' myxdecls
2658 ;
2660 /* to get around the following situation: "int foo (int a) int b; {}" that
2661 is synthesized when parsing "- a:a b:b; id c; id d; { ... }" */
2663 myxdecls:
2664 /* empty */
2665 | mydecls
2666 ;
2668 mydecls:
2669 mydecl
2670 | errstmt
2671 | mydecls mydecl
2672 | mydecl errstmt
2673 ;
2675 mydecl:
2676 typed_declspecs setspecs myparms ';'
2677 { current_declspecs = TREE_VALUE (declspec_stack);
2678 prefix_attributes = TREE_PURPOSE (declspec_stack);
2679 declspec_stack = TREE_CHAIN (declspec_stack); }
2680 | typed_declspecs ';'
2681 { shadow_tag ($1); }
2682 | declmods ';'
2683 { pedwarn ("empty declaration"); }
2684 ;
2686 myparms:
2687 myparm
2688 { push_parm_decl ($1); }
2689 | myparms ',' myparm
2690 { push_parm_decl ($3); }
2691 ;
2693 /* A single parameter declaration or parameter type name,
2694 as found in a parmlist. DOES NOT ALLOW AN INITIALIZER OR ASMSPEC */
2696 myparm:
2697 parm_declarator maybe_attribute
2698 { $$ = build_tree_list (build_tree_list (current_declspecs,
2699 $1),
2700 build_tree_list (prefix_attributes,
2701 $2)); }
2702 | notype_declarator maybe_attribute
2703 { $$ = build_tree_list (build_tree_list (current_declspecs,
2704 $1),
2705 build_tree_list (prefix_attributes,
2706 $2)); }
2707 | absdcl maybe_attribute
2708 { $$ = build_tree_list (build_tree_list (current_declspecs,
2709 $1),
2710 build_tree_list (prefix_attributes,
2711 $2)); }
2712 ;
2714 optparmlist:
2715 /* empty */
2716 {
2717 $$ = NULL_TREE;
2718 }
2719 | ',' ELLIPSIS
2720 {
2721 /* oh what a kludge! */
2722 $$ = objc_ellipsis_node;
2723 }
2724 | ','
2725 {
2726 pushlevel (0);
2727 }
2728 parmlist_2
2729 {
2730 /* returns a tree list node generated by get_parm_info */
2731 $$ = $3;
2732 poplevel (0, 0, 0);
2733 }
2734 ;
2736 unaryselector:
2737 selector
2738 ;
2740 keywordselector:
2741 keyworddecl
2743 | keywordselector keyworddecl
2744 {
2745 $$ = chainon ($1, $2);
2746 }
2747 ;
2749 selector:
2750 IDENTIFIER
2751 | TYPENAME
2752 | OBJECTNAME
2753 | reservedwords
2754 ;
2756 reservedwords:
2757 ENUM { $$ = get_identifier (token_buffer); }
2758 | STRUCT { $$ = get_identifier (token_buffer); }
2759 | UNION { $$ = get_identifier (token_buffer); }
2760 | IF { $$ = get_identifier (token_buffer); }
2761 | ELSE { $$ = get_identifier (token_buffer); }
2762 | WHILE { $$ = get_identifier (token_buffer); }
2763 | DO { $$ = get_identifier (token_buffer); }
2764 | FOR { $$ = get_identifier (token_buffer); }
2765 | SWITCH { $$ = get_identifier (token_buffer); }
2766 | CASE { $$ = get_identifier (token_buffer); }
2767 | DEFAULT { $$ = get_identifier (token_buffer); }
2768 | BREAK { $$ = get_identifier (token_buffer); }
2769 | CONTINUE { $$ = get_identifier (token_buffer); }
2770 | RETURN { $$ = get_identifier (token_buffer); }
2771 | GOTO { $$ = get_identifier (token_buffer); }
2772 | ASM_KEYWORD { $$ = get_identifier (token_buffer); }
2773 | SIZEOF { $$ = get_identifier (token_buffer); }
2774 | TYPEOF { $$ = get_identifier (token_buffer); }
2775 | ALIGNOF { $$ = get_identifier (token_buffer); }
2776 | TYPESPEC | TYPE_QUAL
2777 ;
2779 keyworddecl:
2780 selector ':' '(' typename ')' identifier
2781 {
2782 $$ = build_keyword_decl ($1, $4, $6);
2783 }
2785 | selector ':' identifier
2786 {
2787 $$ = build_keyword_decl ($1, NULL_TREE, $3);
2788 }
2790 | ':' '(' typename ')' identifier
2791 {
2792 $$ = build_keyword_decl (NULL_TREE, $3, $5);
2793 }
2795 | ':' identifier
2796 {
2797 $$ = build_keyword_decl (NULL_TREE, NULL_TREE, $2);
2798 }
2799 ;
2801 messageargs:
2802 selector
2803 | keywordarglist
2804 ;
2806 keywordarglist:
2807 keywordarg
2808 | keywordarglist keywordarg
2809 {
2810 $$ = chainon ($1, $2);
2811 }
2812 ;
2815 keywordexpr:
2816 nonnull_exprlist
2817 {
2818 if (TREE_CHAIN ($1) == NULL_TREE)
2819 /* just return the expr., remove a level of indirection */
2820 $$ = TREE_VALUE ($1);
2821 else
2822 /* we have a comma expr., we will collapse later */
2823 $$ = $1;
2824 }
2825 ;
2827 keywordarg:
2828 selector ':' keywordexpr
2829 {
2830 $$ = build_tree_list ($1, $3);
2831 }
2832 | ':' keywordexpr
2833 {
2834 $$ = build_tree_list (NULL_TREE, $2);
2835 }
2836 ;
2838 receiver:
2839 expr
2840 | CLASSNAME
2841 {
2842 $$ = get_class_reference ($1);
2843 }
2844 ;
2846 objcmessageexpr:
2847 '['
2848 { objc_receiver_context = 1; }
2849 receiver
2850 { objc_receiver_context = 0; }
2851 messageargs ']'
2852 {
2853 $$ = build_tree_list ($3, $5);
2854 }
2855 ;
2857 selectorarg:
2858 selector
2859 | keywordnamelist
2860 ;
2862 keywordnamelist:
2863 keywordname
2864 | keywordnamelist keywordname
2865 {
2866 $$ = chainon ($1, $2);
2867 }
2868 ;
2870 keywordname:
2871 selector ':'
2872 {
2873 $$ = build_tree_list ($1, NULL_TREE);
2874 }
2875 | ':'
2876 {
2877 $$ = build_tree_list (NULL_TREE, NULL_TREE);
2878 }
2879 ;
2881 objcselectorexpr:
2882 SELECTOR '(' selectorarg ')'
2883 {
2884 $$ = $3;
2885 }
2886 ;
2888 objcprotocolexpr:
2889 PROTOCOL '(' identifier ')'
2890 {
2891 $$ = $3;
2892 }
2893 ;
2895 /* extension to support C-structures in the archiver */
2897 objcencodeexpr:
2898 ENCODE '(' typename ')'
2899 {
2900 $$ = groktypename ($3);
2901 }
2902 ;
2904 end ifobjc
2905 %%