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Major cutover to using system.h:
[gcc.git] / gcc / c-parse.in
1 /* YACC parser for C syntax and for Objective C. -*-c-*-
2 Copyright (C) 1987, 88, 89, 92-6, 1997 Free Software Foundation, Inc.
3
4 This file is part of GNU CC.
5
6 GNU CC is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2, or (at your option)
9 any later version.
10
11 GNU CC is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
15
16 You should have received a copy of the GNU General Public License
17 along with GNU CC; see the file COPYING. If not, write to
18 the Free Software Foundation, 59 Temple Place - Suite 330,
19 Boston, MA 02111-1307, USA. */
20
21 /* This file defines the grammar of C and that of Objective C.
22 ifobjc ... end ifobjc conditionals contain code for Objective C only.
23 ifc ... end ifc conditionals contain code for C only.
24 Sed commands in Makefile.in are used to convert this file into
25 c-parse.y and into objc-parse.y. */
26
27 /* To whomever it may concern: I have heard that such a thing was once
28 written by AT&T, but I have never seen it. */
29
30 ifobjc
31 %expect 66
32 end ifobjc
33 ifc
34 %expect 46
35
36 /* These are the 23 conflicts you should get in parse.output;
37 the state numbers may vary if minor changes in the grammar are made.
38
39 State 42 contains 1 shift/reduce conflict. (Two ways to parse ATTRIBUTE.)
40 State 44 contains 1 shift/reduce conflict. (Two ways to recover from error.)
41 State 103 contains 1 shift/reduce conflict. (Two ways to recover from error.)
42 State 110 contains 1 shift/reduce conflict. (Two ways to parse ATTRIBUTE.)
43 State 111 contains 1 shift/reduce conflict. (Two ways to recover from error.)
44 State 115 contains 1 shift/reduce conflict. (Two ways to recover from error.)
45 State 132 contains 1 shift/reduce conflict. (See comment at component_decl.)
46 State 180 contains 1 shift/reduce conflict. (Two ways to parse ATTRIBUTE.)
47 State 194 contains 2 shift/reduce conflict. (Four ways to parse this.)
48 State 202 contains 1 shift/reduce conflict. (Two ways to recover from error.)
49 State 214 contains 1 shift/reduce conflict. (Two ways to recover from error.)
50 State 220 contains 1 shift/reduce conflict. (Two ways to recover from error.)
51 State 304 contains 2 shift/reduce conflicts. (Four ways to parse this.)
52 State 335 contains 2 shift/reduce conflicts. (Four ways to parse this.)
53 State 347 contains 1 shift/reduce conflict. (Two ways to parse ATTRIBUTES.)
54 State 352 contains 1 shift/reduce conflict. (Two ways to parse ATTRIBUTES.)
55 State 383 contains 2 shift/reduce conflicts. (Four ways to parse this.)
56 State 434 contains 2 shift/reduce conflicts. (Four ways to parse this.) */
57
58 end ifc
59
60 %{
61 #include "config.h"
62
63 #include <stdio.h>
64 #include <errno.h>
65 #include <setjmp.h>
66
67 #include "tree.h"
68 #include "input.h"
69 #include "c-lex.h"
70 #include "c-tree.h"
71 #include "flags.h"
72
73 #ifdef MULTIBYTE_CHARS
74 #include <stdlib.h>
75 #include <locale.h>
76 #endif
77
78 ifobjc
79 #include "objc-act.h"
80 end ifobjc
81
82 /* Since parsers are distinct for each language, put the language string
83 definition here. */
84 ifobjc
85 char *language_string = "GNU Obj-C";
86 end ifobjc
87 ifc
88 char *language_string = "GNU C";
89 end ifc
90
91 #ifndef errno
92 extern int errno;
93 #endif
94
95 void yyerror ();
96
97 /* Like YYERROR but do call yyerror. */
98 #define YYERROR1 { yyerror ("syntax error"); YYERROR; }
99
100 /* Cause the `yydebug' variable to be defined. */
101 #define YYDEBUG 1
102 %}
103
104 %start program
105
106 %union {long itype; tree ttype; enum tree_code code;
107 char *filename; int lineno; int ends_in_label; }
108
109 /* All identifiers that are not reserved words
110 and are not declared typedefs in the current block */
111 %token IDENTIFIER
112
113 /* All identifiers that are declared typedefs in the current block.
114 In some contexts, they are treated just like IDENTIFIER,
115 but they can also serve as typespecs in declarations. */
116 %token TYPENAME
117
118 /* Reserved words that specify storage class.
119 yylval contains an IDENTIFIER_NODE which indicates which one. */
120 %token SCSPEC
121
122 /* Reserved words that specify type.
123 yylval contains an IDENTIFIER_NODE which indicates which one. */
124 %token TYPESPEC
125
126 /* Reserved words that qualify type: "const" or "volatile".
127 yylval contains an IDENTIFIER_NODE which indicates which one. */
128 %token TYPE_QUAL
129
130 /* Character or numeric constants.
131 yylval is the node for the constant. */
132 %token CONSTANT
133
134 /* String constants in raw form.
135 yylval is a STRING_CST node. */
136 %token STRING
137
138 /* "...", used for functions with variable arglists. */
139 %token ELLIPSIS
140
141 /* the reserved words */
142 /* SCO include files test "ASM", so use something else. */
143 %token SIZEOF ENUM STRUCT UNION IF ELSE WHILE DO FOR SWITCH CASE DEFAULT
144 %token BREAK CONTINUE RETURN GOTO ASM_KEYWORD TYPEOF ALIGNOF
145 %token ATTRIBUTE EXTENSION LABEL
146 %token REALPART IMAGPART
147
148 /* Add precedence rules to solve dangling else s/r conflict */
149 %nonassoc IF
150 %nonassoc ELSE
151
152 /* Define the operator tokens and their precedences.
153 The value is an integer because, if used, it is the tree code
154 to use in the expression made from the operator. */
155
156 %right <code> ASSIGN '='
157 %right <code> '?' ':'
158 %left <code> OROR
159 %left <code> ANDAND
160 %left <code> '|'
161 %left <code> '^'
162 %left <code> '&'
163 %left <code> EQCOMPARE
164 %left <code> ARITHCOMPARE
165 %left <code> LSHIFT RSHIFT
166 %left <code> '+' '-'
167 %left <code> '*' '/' '%'
168 %right <code> UNARY PLUSPLUS MINUSMINUS
169 %left HYPERUNARY
170 %left <code> POINTSAT '.' '(' '['
171
172 /* The Objective-C keywords. These are included in C and in
173 Objective C, so that the token codes are the same in both. */
174 %token INTERFACE IMPLEMENTATION END SELECTOR DEFS ENCODE
175 %token CLASSNAME PUBLIC PRIVATE PROTECTED PROTOCOL OBJECTNAME CLASS ALIAS
176
177 /* Objective-C string constants in raw form.
178 yylval is an OBJC_STRING_CST node. */
179 %token OBJC_STRING
180
181
182 %type <code> unop
183
184 %type <ttype> identifier IDENTIFIER TYPENAME CONSTANT expr nonnull_exprlist exprlist
185 %type <ttype> expr_no_commas cast_expr unary_expr primary string STRING
186 %type <ttype> typed_declspecs reserved_declspecs
187 %type <ttype> typed_typespecs reserved_typespecquals
188 %type <ttype> declmods typespec typespecqual_reserved
189 %type <ttype> typed_declspecs_no_prefix_attr reserved_declspecs_no_prefix_attr
190 %type <ttype> declmods_no_prefix_attr
191 %type <ttype> SCSPEC TYPESPEC TYPE_QUAL nonempty_type_quals maybe_type_qual
192 %type <ttype> initdecls notype_initdecls initdcl notype_initdcl
193 %type <ttype> init maybeasm
194 %type <ttype> asm_operands nonnull_asm_operands asm_operand asm_clobbers
195 %type <ttype> maybe_attribute attributes attribute attribute_list attrib
196 %type <ttype> any_word
197
198 %type <ttype> compstmt
199
200 %type <ttype> declarator
201 %type <ttype> notype_declarator after_type_declarator
202 %type <ttype> parm_declarator
203
204 %type <ttype> structsp component_decl_list component_decl_list2
205 %type <ttype> component_decl components component_declarator
206 %type <ttype> enumlist enumerator
207 %type <ttype> typename absdcl absdcl1 type_quals
208 %type <ttype> xexpr parms parm identifiers
209
210 %type <ttype> parmlist parmlist_1 parmlist_2
211 %type <ttype> parmlist_or_identifiers parmlist_or_identifiers_1
212 %type <ttype> identifiers_or_typenames
213
214 %type <itype> setspecs
215
216 %type <ends_in_label> lineno_stmt_or_label lineno_stmt_or_labels stmt_or_label
217
218 %type <filename> save_filename
219 %type <lineno> save_lineno
220 \f
221 ifobjc
222 /* the Objective-C nonterminals */
223
224 %type <ttype> ivar_decl_list ivar_decls ivar_decl ivars ivar_declarator
225 %type <ttype> methoddecl unaryselector keywordselector selector
226 %type <ttype> keyworddecl receiver objcmessageexpr messageargs
227 %type <ttype> keywordexpr keywordarglist keywordarg
228 %type <ttype> myparms myparm optparmlist reservedwords objcselectorexpr
229 %type <ttype> selectorarg keywordnamelist keywordname objcencodeexpr
230 %type <ttype> objc_string non_empty_protocolrefs protocolrefs identifier_list objcprotocolexpr
231
232 %type <ttype> CLASSNAME OBJC_STRING OBJECTNAME
233 end ifobjc
234 \f
235 %{
236 /* Number of statements (loosely speaking) and compound statements
237 seen so far. */
238 static int stmt_count;
239 static int compstmt_count;
240
241 /* Input file and line number of the end of the body of last simple_if;
242 used by the stmt-rule immediately after simple_if returns. */
243 static char *if_stmt_file;
244 static int if_stmt_line;
245
246 /* List of types and structure classes of the current declaration. */
247 static tree current_declspecs = NULL_TREE;
248 static tree prefix_attributes = NULL_TREE;
249
250 /* Stack of saved values of current_declspecs and prefix_attributes. */
251 static tree declspec_stack;
252
253 /* 1 if we explained undeclared var errors. */
254 static int undeclared_variable_notice;
255
256 ifobjc
257 /* Objective-C specific information */
258
259 tree objc_interface_context;
260 tree objc_implementation_context;
261 tree objc_method_context;
262 tree objc_ivar_chain;
263 tree objc_ivar_context;
264 enum tree_code objc_inherit_code;
265 int objc_receiver_context;
266 int objc_public_flag;
267
268 end ifobjc
269
270 /* Tell yyparse how to print a token's value, if yydebug is set. */
271
272 #define YYPRINT(FILE,YYCHAR,YYLVAL) yyprint(FILE,YYCHAR,YYLVAL)
273 extern void yyprint ();
274 %}
275 \f
276 %%
277 program: /* empty */
278 { if (pedantic)
279 pedwarn ("ANSI C forbids an empty source file");
280 finish_file ();
281 }
282 | extdefs
283 {
284 /* In case there were missing closebraces,
285 get us back to the global binding level. */
286 while (! global_bindings_p ())
287 poplevel (0, 0, 0);
288 finish_file ();
289 }
290 ;
291
292 /* the reason for the strange actions in this rule
293 is so that notype_initdecls when reached via datadef
294 can find a valid list of type and sc specs in $0. */
295
296 extdefs:
297 {$<ttype>$ = NULL_TREE; } extdef
298 | extdefs {$<ttype>$ = NULL_TREE; } extdef
299 ;
300
301 extdef:
302 fndef
303 | datadef
304 ifobjc
305 | objcdef
306 end ifobjc
307 | ASM_KEYWORD '(' expr ')' ';'
308 { STRIP_NOPS ($3);
309 if ((TREE_CODE ($3) == ADDR_EXPR
310 && TREE_CODE (TREE_OPERAND ($3, 0)) == STRING_CST)
311 || TREE_CODE ($3) == STRING_CST)
312 assemble_asm ($3);
313 else
314 error ("argument of `asm' is not a constant string"); }
315 | extension extdef
316 { pedantic = $<itype>1; }
317 ;
318
319 datadef:
320 setspecs notype_initdecls ';'
321 { if (pedantic)
322 error ("ANSI C forbids data definition with no type or storage class");
323 else if (!flag_traditional)
324 warning ("data definition has no type or storage class");
325
326 current_declspecs = TREE_VALUE (declspec_stack);
327 prefix_attributes = TREE_PURPOSE (declspec_stack);
328 declspec_stack = TREE_CHAIN (declspec_stack);
329 resume_momentary ($1); }
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 resume_momentary ($2); }
335 | typed_declspecs setspecs initdecls ';'
336 { current_declspecs = TREE_VALUE (declspec_stack);
337 prefix_attributes = TREE_PURPOSE (declspec_stack);
338 declspec_stack = TREE_CHAIN (declspec_stack);
339 resume_momentary ($2); }
340 | declmods ';'
341 { pedwarn ("empty declaration"); }
342 | typed_declspecs ';'
343 { shadow_tag ($1); }
344 | error ';'
345 | error '}'
346 | ';'
347 { if (pedantic)
348 pedwarn ("ANSI C does not allow extra `;' outside of a function"); }
349 ;
350 \f
351 fndef:
352 typed_declspecs setspecs declarator
353 { if (! start_function (current_declspecs, $3,
354 prefix_attributes, NULL_TREE, 0))
355 YYERROR1;
356 reinit_parse_for_function (); }
357 old_style_parm_decls
358 { store_parm_decls (); }
359 compstmt_or_error
360 { finish_function (0);
361 current_declspecs = TREE_VALUE (declspec_stack);
362 prefix_attributes = TREE_PURPOSE (declspec_stack);
363 declspec_stack = TREE_CHAIN (declspec_stack);
364 resume_momentary ($2); }
365 | typed_declspecs setspecs declarator error
366 { current_declspecs = TREE_VALUE (declspec_stack);
367 prefix_attributes = TREE_PURPOSE (declspec_stack);
368 declspec_stack = TREE_CHAIN (declspec_stack);
369 resume_momentary ($2); }
370 | declmods setspecs notype_declarator
371 { if (! start_function (current_declspecs, $3,
372 prefix_attributes, NULL_TREE, 0))
373 YYERROR1;
374 reinit_parse_for_function (); }
375 old_style_parm_decls
376 { store_parm_decls (); }
377 compstmt_or_error
378 { finish_function (0);
379 current_declspecs = TREE_VALUE (declspec_stack);
380 prefix_attributes = TREE_PURPOSE (declspec_stack);
381 declspec_stack = TREE_CHAIN (declspec_stack);
382 resume_momentary ($2); }
383 | declmods setspecs notype_declarator error
384 { current_declspecs = TREE_VALUE (declspec_stack);
385 prefix_attributes = TREE_PURPOSE (declspec_stack);
386 declspec_stack = TREE_CHAIN (declspec_stack);
387 resume_momentary ($2); }
388 | setspecs notype_declarator
389 { if (! start_function (NULL_TREE, $2,
390 prefix_attributes, NULL_TREE, 0))
391 YYERROR1;
392 reinit_parse_for_function (); }
393 old_style_parm_decls
394 { store_parm_decls (); }
395 compstmt_or_error
396 { finish_function (0);
397 current_declspecs = TREE_VALUE (declspec_stack);
398 prefix_attributes = TREE_PURPOSE (declspec_stack);
399 declspec_stack = TREE_CHAIN (declspec_stack);
400 resume_momentary ($1); }
401 | setspecs notype_declarator error
402 { current_declspecs = TREE_VALUE (declspec_stack);
403 prefix_attributes = TREE_PURPOSE (declspec_stack);
404 declspec_stack = TREE_CHAIN (declspec_stack);
405 resume_momentary ($1); }
406 ;
407
408 identifier:
409 IDENTIFIER
410 | TYPENAME
411 ifobjc
412 | OBJECTNAME
413 | CLASSNAME
414 end ifobjc
415 ;
416
417 unop: '&'
418 { $$ = ADDR_EXPR; }
419 | '-'
420 { $$ = NEGATE_EXPR; }
421 | '+'
422 { $$ = CONVERT_EXPR; }
423 | PLUSPLUS
424 { $$ = PREINCREMENT_EXPR; }
425 | MINUSMINUS
426 { $$ = PREDECREMENT_EXPR; }
427 | '~'
428 { $$ = BIT_NOT_EXPR; }
429 | '!'
430 { $$ = TRUTH_NOT_EXPR; }
431 ;
432
433 expr: nonnull_exprlist
434 { $$ = build_compound_expr ($1); }
435 ;
436
437 exprlist:
438 /* empty */
439 { $$ = NULL_TREE; }
440 | nonnull_exprlist
441 ;
442
443 nonnull_exprlist:
444 expr_no_commas
445 { $$ = build_tree_list (NULL_TREE, $1); }
446 | nonnull_exprlist ',' expr_no_commas
447 { chainon ($1, build_tree_list (NULL_TREE, $3)); }
448 ;
449
450 unary_expr:
451 primary
452 | '*' cast_expr %prec UNARY
453 { $$ = build_indirect_ref ($2, "unary *"); }
454 /* __extension__ turns off -pedantic for following primary. */
455 | extension cast_expr %prec UNARY
456 { $$ = $2;
457 pedantic = $<itype>1; }
458 | unop cast_expr %prec UNARY
459 { $$ = build_unary_op ($1, $2, 0);
460 overflow_warning ($$); }
461 /* Refer to the address of a label as a pointer. */
462 | ANDAND identifier
463 { tree label = lookup_label ($2);
464 if (pedantic)
465 pedwarn ("ANSI C forbids `&&'");
466 if (label == 0)
467 $$ = null_pointer_node;
468 else
469 {
470 TREE_USED (label) = 1;
471 $$ = build1 (ADDR_EXPR, ptr_type_node, label);
472 TREE_CONSTANT ($$) = 1;
473 }
474 }
475 /* This seems to be impossible on some machines, so let's turn it off.
476 You can use __builtin_next_arg to find the anonymous stack args.
477 | '&' ELLIPSIS
478 { tree types = TYPE_ARG_TYPES (TREE_TYPE (current_function_decl));
479 $$ = error_mark_node;
480 if (TREE_VALUE (tree_last (types)) == void_type_node)
481 error ("`&...' used in function with fixed number of arguments");
482 else
483 {
484 if (pedantic)
485 pedwarn ("ANSI C forbids `&...'");
486 $$ = tree_last (DECL_ARGUMENTS (current_function_decl));
487 $$ = build_unary_op (ADDR_EXPR, $$, 0);
488 } }
489 */
490 | sizeof unary_expr %prec UNARY
491 { skip_evaluation--;
492 if (TREE_CODE ($2) == COMPONENT_REF
493 && DECL_C_BIT_FIELD (TREE_OPERAND ($2, 1)))
494 error ("`sizeof' applied to a bit-field");
495 $$ = c_sizeof (TREE_TYPE ($2)); }
496 | sizeof '(' typename ')' %prec HYPERUNARY
497 { skip_evaluation--;
498 $$ = c_sizeof (groktypename ($3)); }
499 | alignof unary_expr %prec UNARY
500 { skip_evaluation--;
501 $$ = c_alignof_expr ($2); }
502 | alignof '(' typename ')' %prec HYPERUNARY
503 { skip_evaluation--;
504 $$ = c_alignof (groktypename ($3)); }
505 | REALPART cast_expr %prec UNARY
506 { $$ = build_unary_op (REALPART_EXPR, $2, 0); }
507 | IMAGPART cast_expr %prec UNARY
508 { $$ = build_unary_op (IMAGPART_EXPR, $2, 0); }
509 ;
510
511 sizeof:
512 SIZEOF { skip_evaluation++; }
513 ;
514
515 alignof:
516 ALIGNOF { skip_evaluation++; }
517 ;
518
519 cast_expr:
520 unary_expr
521 | '(' typename ')' cast_expr %prec UNARY
522 { tree type = groktypename ($2);
523 $$ = build_c_cast (type, $4); }
524 | '(' typename ')' '{'
525 { start_init (NULL_TREE, NULL, 0);
526 $2 = groktypename ($2);
527 really_start_incremental_init ($2); }
528 initlist_maybe_comma '}' %prec UNARY
529 { char *name;
530 tree result = pop_init_level (0);
531 tree type = $2;
532 finish_init ();
533
534 if (pedantic)
535 pedwarn ("ANSI C forbids constructor expressions");
536 if (TYPE_NAME (type) != 0)
537 {
538 if (TREE_CODE (TYPE_NAME (type)) == IDENTIFIER_NODE)
539 name = IDENTIFIER_POINTER (TYPE_NAME (type));
540 else
541 name = IDENTIFIER_POINTER (DECL_NAME (TYPE_NAME (type)));
542 }
543 else
544 name = "";
545 $$ = result;
546 if (TREE_CODE (type) == ARRAY_TYPE && TYPE_SIZE (type) == 0)
547 {
548 int failure = complete_array_type (type, $$, 1);
549 if (failure)
550 abort ();
551 }
552 }
553 ;
554
555 expr_no_commas:
556 cast_expr
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 '*' 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 { $$ = parser_build_binary_op ($2, $1, $3); }
567 | expr_no_commas LSHIFT expr_no_commas
568 { $$ = parser_build_binary_op ($2, $1, $3); }
569 | expr_no_commas RSHIFT expr_no_commas
570 { $$ = parser_build_binary_op ($2, $1, $3); }
571 | expr_no_commas ARITHCOMPARE expr_no_commas
572 { $$ = parser_build_binary_op ($2, $1, $3); }
573 | expr_no_commas EQCOMPARE expr_no_commas
574 { $$ = parser_build_binary_op ($2, $1, $3); }
575 | expr_no_commas '&' expr_no_commas
576 { $$ = parser_build_binary_op ($2, $1, $3); }
577 | expr_no_commas '|' expr_no_commas
578 { $$ = parser_build_binary_op ($2, $1, $3); }
579 | expr_no_commas '^' expr_no_commas
580 { $$ = parser_build_binary_op ($2, $1, $3); }
581 | expr_no_commas ANDAND
582 { $1 = truthvalue_conversion (default_conversion ($1));
583 skip_evaluation += $1 == boolean_false_node; }
584 expr_no_commas
585 { skip_evaluation -= $1 == boolean_false_node;
586 $$ = parser_build_binary_op (TRUTH_ANDIF_EXPR, $1, $4); }
587 | expr_no_commas OROR
588 { $1 = truthvalue_conversion (default_conversion ($1));
589 skip_evaluation += $1 == boolean_true_node; }
590 expr_no_commas
591 { skip_evaluation -= $1 == boolean_true_node;
592 $$ = parser_build_binary_op (TRUTH_ORIF_EXPR, $1, $4); }
593 | expr_no_commas '?'
594 { $1 = truthvalue_conversion (default_conversion ($1));
595 skip_evaluation += $1 == boolean_false_node; }
596 expr ':'
597 { skip_evaluation += (($1 == boolean_true_node)
598 - ($1 == boolean_false_node)); }
599 expr_no_commas
600 { skip_evaluation -= $1 == boolean_true_node;
601 $$ = build_conditional_expr ($1, $4, $7); }
602 | expr_no_commas '?'
603 { if (pedantic)
604 pedwarn ("ANSI C forbids omitting the middle term of a ?: expression");
605 /* Make sure first operand is calculated only once. */
606 $<ttype>2 = save_expr ($1);
607 $1 = truthvalue_conversion (default_conversion ($<ttype>2));
608 skip_evaluation += $1 == boolean_true_node; }
609 ':' expr_no_commas
610 { skip_evaluation -= $1 == boolean_true_node;
611 $$ = build_conditional_expr ($1, $<ttype>2, $5); }
612 | expr_no_commas '=' expr_no_commas
613 { $$ = build_modify_expr ($1, NOP_EXPR, $3);
614 C_SET_EXP_ORIGINAL_CODE ($$, MODIFY_EXPR); }
615 | expr_no_commas ASSIGN expr_no_commas
616 { $$ = build_modify_expr ($1, $2, $3);
617 /* This inhibits warnings in truthvalue_conversion. */
618 C_SET_EXP_ORIGINAL_CODE ($$, ERROR_MARK); }
619 ;
620
621 primary:
622 IDENTIFIER
623 {
624 $$ = lastiddecl;
625 if (!$$ || $$ == error_mark_node)
626 {
627 if (yychar == YYEMPTY)
628 yychar = YYLEX;
629 if (yychar == '(')
630 {
631 ifobjc
632 tree decl;
633
634 if (objc_receiver_context
635 && ! (objc_receiver_context
636 && strcmp (IDENTIFIER_POINTER ($1), "super")))
637 /* we have a message to super */
638 $$ = get_super_receiver ();
639 else if (objc_method_context
640 && (decl = is_ivar (objc_ivar_chain, $1)))
641 {
642 if (is_private (decl))
643 $$ = error_mark_node;
644 else
645 $$ = build_ivar_reference ($1);
646 }
647 else
648 end ifobjc
649 {
650 /* Ordinary implicit function declaration. */
651 $$ = implicitly_declare ($1);
652 assemble_external ($$);
653 TREE_USED ($$) = 1;
654 }
655 }
656 else if (current_function_decl == 0)
657 {
658 error ("`%s' undeclared here (not in a function)",
659 IDENTIFIER_POINTER ($1));
660 $$ = error_mark_node;
661 }
662 else
663 {
664 ifobjc
665 tree decl;
666
667 if (objc_receiver_context
668 && ! strcmp (IDENTIFIER_POINTER ($1), "super"))
669 /* we have a message to super */
670 $$ = get_super_receiver ();
671 else if (objc_method_context
672 && (decl = is_ivar (objc_ivar_chain, $1)))
673 {
674 if (is_private (decl))
675 $$ = error_mark_node;
676 else
677 $$ = build_ivar_reference ($1);
678 }
679 else
680 end ifobjc
681 {
682 if (IDENTIFIER_GLOBAL_VALUE ($1) != error_mark_node
683 || IDENTIFIER_ERROR_LOCUS ($1) != current_function_decl)
684 {
685 error ("`%s' undeclared (first use in this function)",
686 IDENTIFIER_POINTER ($1));
687
688 if (! undeclared_variable_notice)
689 {
690 error ("(Each undeclared identifier is reported only once");
691 error ("for each function it appears in.)");
692 undeclared_variable_notice = 1;
693 }
694 }
695 $$ = error_mark_node;
696 /* Prevent repeated error messages. */
697 IDENTIFIER_GLOBAL_VALUE ($1) = error_mark_node;
698 IDENTIFIER_ERROR_LOCUS ($1) = current_function_decl;
699 }
700 }
701 }
702 else if (TREE_TYPE ($$) == error_mark_node)
703 $$ = error_mark_node;
704 else if (C_DECL_ANTICIPATED ($$))
705 {
706 /* The first time we see a build-in function used,
707 if it has not been declared. */
708 C_DECL_ANTICIPATED ($$) = 0;
709 if (yychar == YYEMPTY)
710 yychar = YYLEX;
711 if (yychar == '(')
712 {
713 /* Omit the implicit declaration we
714 would ordinarily do, so we don't lose
715 the actual built in type.
716 But print a diagnostic for the mismatch. */
717 ifobjc
718 if (objc_method_context
719 && is_ivar (objc_ivar_chain, $1))
720 error ("Instance variable `%s' implicitly declared as function",
721 IDENTIFIER_POINTER (DECL_NAME ($$)));
722 else
723 end ifobjc
724 if (TREE_CODE ($$) != FUNCTION_DECL)
725 error ("`%s' implicitly declared as function",
726 IDENTIFIER_POINTER (DECL_NAME ($$)));
727 else if ((TYPE_MODE (TREE_TYPE (TREE_TYPE ($$)))
728 != TYPE_MODE (integer_type_node))
729 && (TREE_TYPE (TREE_TYPE ($$))
730 != void_type_node))
731 pedwarn ("type mismatch in implicit declaration for built-in function `%s'",
732 IDENTIFIER_POINTER (DECL_NAME ($$)));
733 /* If it really returns void, change that to int. */
734 if (TREE_TYPE (TREE_TYPE ($$)) == void_type_node)
735 TREE_TYPE ($$)
736 = build_function_type (integer_type_node,
737 TYPE_ARG_TYPES (TREE_TYPE ($$)));
738 }
739 else
740 pedwarn ("built-in function `%s' used without declaration",
741 IDENTIFIER_POINTER (DECL_NAME ($$)));
742
743 /* Do what we would ordinarily do when a fn is used. */
744 assemble_external ($$);
745 TREE_USED ($$) = 1;
746 }
747 else
748 {
749 assemble_external ($$);
750 TREE_USED ($$) = 1;
751 ifobjc
752 /* we have a definition - still check if iVariable */
753
754 if (!objc_receiver_context
755 || (objc_receiver_context
756 && strcmp (IDENTIFIER_POINTER ($1), "super")))
757 {
758 tree decl;
759
760 if (objc_method_context
761 && (decl = is_ivar (objc_ivar_chain, $1)))
762 {
763 if (IDENTIFIER_LOCAL_VALUE ($1))
764 warning ("local declaration of `%s' hides instance variable",
765 IDENTIFIER_POINTER ($1));
766 else
767 {
768 if (is_private (decl))
769 $$ = error_mark_node;
770 else
771 $$ = build_ivar_reference ($1);
772 }
773 }
774 }
775 else /* we have a message to super */
776 $$ = get_super_receiver ();
777 end ifobjc
778 }
779
780 if (TREE_CODE ($$) == CONST_DECL)
781 {
782 $$ = DECL_INITIAL ($$);
783 /* This is to prevent an enum whose value is 0
784 from being considered a null pointer constant. */
785 $$ = build1 (NOP_EXPR, TREE_TYPE ($$), $$);
786 TREE_CONSTANT ($$) = 1;
787 }
788 }
789 | CONSTANT
790 | string
791 { $$ = combine_strings ($1); }
792 | '(' expr ')'
793 { char class = TREE_CODE_CLASS (TREE_CODE ($2));
794 if (class == 'e' || class == '1'
795 || class == '2' || class == '<')
796 C_SET_EXP_ORIGINAL_CODE ($2, ERROR_MARK);
797 $$ = $2; }
798 | '(' error ')'
799 { $$ = error_mark_node; }
800 | '('
801 { if (current_function_decl == 0)
802 {
803 error ("braced-group within expression allowed only inside a function");
804 YYERROR;
805 }
806 /* We must force a BLOCK for this level
807 so that, if it is not expanded later,
808 there is a way to turn off the entire subtree of blocks
809 that are contained in it. */
810 keep_next_level ();
811 push_iterator_stack ();
812 push_label_level ();
813 $<ttype>$ = expand_start_stmt_expr (); }
814 compstmt ')'
815 { tree rtl_exp;
816 if (pedantic)
817 pedwarn ("ANSI C forbids braced-groups within expressions");
818 pop_iterator_stack ();
819 pop_label_level ();
820 rtl_exp = expand_end_stmt_expr ($<ttype>2);
821 /* The statements have side effects, so the group does. */
822 TREE_SIDE_EFFECTS (rtl_exp) = 1;
823
824 if (TREE_CODE ($3) == BLOCK)
825 {
826 /* Make a BIND_EXPR for the BLOCK already made. */
827 $$ = build (BIND_EXPR, TREE_TYPE (rtl_exp),
828 NULL_TREE, rtl_exp, $3);
829 /* Remove the block from the tree at this point.
830 It gets put back at the proper place
831 when the BIND_EXPR is expanded. */
832 delete_block ($3);
833 }
834 else
835 $$ = $3;
836 }
837 | primary '(' exprlist ')' %prec '.'
838 { $$ = build_function_call ($1, $3); }
839 | primary '[' expr ']' %prec '.'
840 { $$ = build_array_ref ($1, $3); }
841 | primary '.' identifier
842 {
843 ifobjc
844 if (doing_objc_thang)
845 {
846 if (is_public ($1, $3))
847 $$ = build_component_ref ($1, $3);
848 else
849 $$ = error_mark_node;
850 }
851 else
852 end ifobjc
853 $$ = build_component_ref ($1, $3);
854 }
855 | primary POINTSAT identifier
856 {
857 tree expr = build_indirect_ref ($1, "->");
858
859 ifobjc
860 if (doing_objc_thang)
861 {
862 if (is_public (expr, $3))
863 $$ = build_component_ref (expr, $3);
864 else
865 $$ = error_mark_node;
866 }
867 else
868 end ifobjc
869 $$ = build_component_ref (expr, $3);
870 }
871 | primary PLUSPLUS
872 { $$ = build_unary_op (POSTINCREMENT_EXPR, $1, 0); }
873 | primary MINUSMINUS
874 { $$ = build_unary_op (POSTDECREMENT_EXPR, $1, 0); }
875 ifobjc
876 | objcmessageexpr
877 { $$ = build_message_expr ($1); }
878 | objcselectorexpr
879 { $$ = build_selector_expr ($1); }
880 | objcprotocolexpr
881 { $$ = build_protocol_expr ($1); }
882 | objcencodeexpr
883 { $$ = build_encode_expr ($1); }
884 | objc_string
885 { $$ = build_objc_string_object ($1); }
886 end ifobjc
887 ;
888
889 /* Produces a STRING_CST with perhaps more STRING_CSTs chained onto it. */
890 string:
891 STRING
892 | string STRING
893 { $$ = chainon ($1, $2); }
894 ;
895
896 ifobjc
897 /* Produces an OBJC_STRING_CST with perhaps more OBJC_STRING_CSTs chained
898 onto it. */
899 objc_string:
900 OBJC_STRING
901 | objc_string OBJC_STRING
902 { $$ = chainon ($1, $2); }
903 ;
904 end ifobjc
905
906 old_style_parm_decls:
907 /* empty */
908 | datadecls
909 | datadecls ELLIPSIS
910 /* ... is used here to indicate a varargs function. */
911 { c_mark_varargs ();
912 if (pedantic)
913 pedwarn ("ANSI C does not permit use of `varargs.h'"); }
914 ;
915
916 /* The following are analogous to lineno_decl, decls and decl
917 except that they do not allow nested functions.
918 They are used for old-style parm decls. */
919 lineno_datadecl:
920 save_filename save_lineno datadecl
921 { }
922 ;
923
924 datadecls:
925 lineno_datadecl
926 | errstmt
927 | datadecls lineno_datadecl
928 | lineno_datadecl errstmt
929 ;
930
931 /* We don't allow prefix attributes here because they cause reduce/reduce
932 conflicts: we can't know whether we're parsing a function decl with
933 attribute suffix, or function defn with attribute prefix on first old
934 style parm. */
935 datadecl:
936 typed_declspecs_no_prefix_attr setspecs initdecls ';'
937 { current_declspecs = TREE_VALUE (declspec_stack);
938 prefix_attributes = TREE_PURPOSE (declspec_stack);
939 declspec_stack = TREE_CHAIN (declspec_stack);
940 resume_momentary ($2); }
941 | declmods_no_prefix_attr setspecs notype_initdecls ';'
942 { current_declspecs = TREE_VALUE (declspec_stack);
943 prefix_attributes = TREE_PURPOSE (declspec_stack);
944 declspec_stack = TREE_CHAIN (declspec_stack);
945 resume_momentary ($2); }
946 | typed_declspecs_no_prefix_attr ';'
947 { shadow_tag_warned ($1, 1);
948 pedwarn ("empty declaration"); }
949 | declmods_no_prefix_attr ';'
950 { pedwarn ("empty declaration"); }
951 ;
952
953 /* This combination which saves a lineno before a decl
954 is the normal thing to use, rather than decl itself.
955 This is to avoid shift/reduce conflicts in contexts
956 where statement labels are allowed. */
957 lineno_decl:
958 save_filename save_lineno decl
959 { }
960 ;
961
962 decls:
963 lineno_decl
964 | errstmt
965 | decls lineno_decl
966 | lineno_decl errstmt
967 ;
968
969 /* records the type and storage class specs to use for processing
970 the declarators that follow.
971 Maintains a stack of outer-level values of current_declspecs,
972 for the sake of parm declarations nested in function declarators. */
973 setspecs: /* empty */
974 { $$ = suspend_momentary ();
975 pending_xref_error ();
976 declspec_stack = tree_cons (prefix_attributes,
977 current_declspecs,
978 declspec_stack);
979 split_specs_attrs ($<ttype>0,
980 &current_declspecs, &prefix_attributes); }
981 ;
982
983 /* ??? Yuck. See after_type_declarator. */
984 setattrs: /* empty */
985 { prefix_attributes = chainon (prefix_attributes, $<ttype>0); }
986 ;
987
988 decl:
989 typed_declspecs setspecs initdecls ';'
990 { current_declspecs = TREE_VALUE (declspec_stack);
991 prefix_attributes = TREE_PURPOSE (declspec_stack);
992 declspec_stack = TREE_CHAIN (declspec_stack);
993 resume_momentary ($2); }
994 | declmods setspecs notype_initdecls ';'
995 { current_declspecs = TREE_VALUE (declspec_stack);
996 prefix_attributes = TREE_PURPOSE (declspec_stack);
997 declspec_stack = TREE_CHAIN (declspec_stack);
998 resume_momentary ($2); }
999 | typed_declspecs setspecs nested_function
1000 { current_declspecs = TREE_VALUE (declspec_stack);
1001 prefix_attributes = TREE_PURPOSE (declspec_stack);
1002 declspec_stack = TREE_CHAIN (declspec_stack);
1003 resume_momentary ($2); }
1004 | declmods setspecs notype_nested_function
1005 { current_declspecs = TREE_VALUE (declspec_stack);
1006 prefix_attributes = TREE_PURPOSE (declspec_stack);
1007 declspec_stack = TREE_CHAIN (declspec_stack);
1008 resume_momentary ($2); }
1009 | typed_declspecs ';'
1010 { shadow_tag ($1); }
1011 | declmods ';'
1012 { pedwarn ("empty declaration"); }
1013 | extension decl
1014 { pedantic = $<itype>1; }
1015 ;
1016
1017 /* Declspecs which contain at least one type specifier or typedef name.
1018 (Just `const' or `volatile' is not enough.)
1019 A typedef'd name following these is taken as a name to be declared.
1020 Declspecs have a non-NULL TREE_VALUE, attributes do not. */
1021
1022 typed_declspecs:
1023 typespec reserved_declspecs
1024 { $$ = tree_cons (NULL_TREE, $1, $2); }
1025 | declmods typespec reserved_declspecs
1026 { $$ = chainon ($3, tree_cons (NULL_TREE, $2, $1)); }
1027 ;
1028
1029 reserved_declspecs: /* empty */
1030 { $$ = NULL_TREE; }
1031 | reserved_declspecs typespecqual_reserved
1032 { $$ = tree_cons (NULL_TREE, $2, $1); }
1033 | reserved_declspecs SCSPEC
1034 { if (extra_warnings)
1035 warning ("`%s' is not at beginning of declaration",
1036 IDENTIFIER_POINTER ($2));
1037 $$ = tree_cons (NULL_TREE, $2, $1); }
1038 | reserved_declspecs attributes
1039 { $$ = tree_cons ($2, NULL_TREE, $1); }
1040 ;
1041
1042 typed_declspecs_no_prefix_attr:
1043 typespec reserved_declspecs_no_prefix_attr
1044 { $$ = tree_cons (NULL_TREE, $1, $2); }
1045 | declmods_no_prefix_attr typespec reserved_declspecs_no_prefix_attr
1046 { $$ = chainon ($3, tree_cons (NULL_TREE, $2, $1)); }
1047 ;
1048
1049 reserved_declspecs_no_prefix_attr:
1050 /* empty */
1051 { $$ = NULL_TREE; }
1052 | reserved_declspecs_no_prefix_attr typespecqual_reserved
1053 { $$ = tree_cons (NULL_TREE, $2, $1); }
1054 | reserved_declspecs_no_prefix_attr SCSPEC
1055 { if (extra_warnings)
1056 warning ("`%s' is not at beginning of declaration",
1057 IDENTIFIER_POINTER ($2));
1058 $$ = tree_cons (NULL_TREE, $2, $1); }
1059 ;
1060
1061 /* List of just storage classes, type modifiers, and prefix attributes.
1062 A declaration can start with just this, but then it cannot be used
1063 to redeclare a typedef-name.
1064 Declspecs have a non-NULL TREE_VALUE, attributes do not. */
1065
1066 declmods:
1067 declmods_no_prefix_attr
1068 { $$ = $1; }
1069 | attributes
1070 { $$ = tree_cons ($1, NULL_TREE, NULL_TREE); }
1071 | declmods declmods_no_prefix_attr
1072 { $$ = chainon ($2, $1); }
1073 | declmods attributes
1074 { $$ = tree_cons ($2, NULL_TREE, $1); }
1075 ;
1076
1077 declmods_no_prefix_attr:
1078 TYPE_QUAL
1079 { $$ = tree_cons (NULL_TREE, $1, NULL_TREE);
1080 TREE_STATIC ($$) = 1; }
1081 | SCSPEC
1082 { $$ = tree_cons (NULL_TREE, $1, NULL_TREE); }
1083 | declmods_no_prefix_attr TYPE_QUAL
1084 { $$ = tree_cons (NULL_TREE, $2, $1);
1085 TREE_STATIC ($$) = 1; }
1086 | declmods_no_prefix_attr SCSPEC
1087 { if (extra_warnings && TREE_STATIC ($1))
1088 warning ("`%s' is not at beginning of declaration",
1089 IDENTIFIER_POINTER ($2));
1090 $$ = tree_cons (NULL_TREE, $2, $1);
1091 TREE_STATIC ($$) = TREE_STATIC ($1); }
1092 ;
1093
1094
1095 /* Used instead of declspecs where storage classes are not allowed
1096 (that is, for typenames and structure components).
1097 Don't accept a typedef-name if anything but a modifier precedes it. */
1098
1099 typed_typespecs:
1100 typespec reserved_typespecquals
1101 { $$ = tree_cons (NULL_TREE, $1, $2); }
1102 | nonempty_type_quals typespec reserved_typespecquals
1103 { $$ = chainon ($3, tree_cons (NULL_TREE, $2, $1)); }
1104 ;
1105
1106 reserved_typespecquals: /* empty */
1107 { $$ = NULL_TREE; }
1108 | reserved_typespecquals typespecqual_reserved
1109 { $$ = tree_cons (NULL_TREE, $2, $1); }
1110 ;
1111
1112 /* A typespec (but not a type qualifier).
1113 Once we have seen one of these in a declaration,
1114 if a typedef name appears then it is being redeclared. */
1115
1116 typespec: TYPESPEC
1117 | structsp
1118 | TYPENAME
1119 { /* For a typedef name, record the meaning, not the name.
1120 In case of `foo foo, bar;'. */
1121 $$ = lookup_name ($1); }
1122 ifobjc
1123 | CLASSNAME protocolrefs
1124 { $$ = get_static_reference ($1, $2); }
1125 | OBJECTNAME protocolrefs
1126 { $$ = get_object_reference ($2); }
1127
1128 /* Make "<SomeProtocol>" equivalent to "id <SomeProtocol>"
1129 - nisse@lysator.liu.se */
1130 | non_empty_protocolrefs
1131 { $$ = get_object_reference ($1); }
1132 end ifobjc
1133 | TYPEOF '(' expr ')'
1134 { $$ = TREE_TYPE ($3); }
1135 | TYPEOF '(' typename ')'
1136 { $$ = groktypename ($3); }
1137 ;
1138
1139 /* A typespec that is a reserved word, or a type qualifier. */
1140
1141 typespecqual_reserved: TYPESPEC
1142 | TYPE_QUAL
1143 | structsp
1144 ;
1145
1146 initdecls:
1147 initdcl
1148 | initdecls ',' initdcl
1149 ;
1150
1151 notype_initdecls:
1152 notype_initdcl
1153 | notype_initdecls ',' initdcl
1154 ;
1155
1156 maybeasm:
1157 /* empty */
1158 { $$ = NULL_TREE; }
1159 | ASM_KEYWORD '(' string ')'
1160 { if (TREE_CHAIN ($3)) $3 = combine_strings ($3);
1161 $$ = $3;
1162 }
1163 ;
1164
1165 initdcl:
1166 declarator maybeasm maybe_attribute '='
1167 { $<ttype>$ = start_decl ($1, current_declspecs, 1,
1168 $3, prefix_attributes);
1169 start_init ($<ttype>$, $2, global_bindings_p ()); }
1170 init
1171 /* Note how the declaration of the variable is in effect while its init is parsed! */
1172 { finish_init ();
1173 finish_decl ($<ttype>5, $6, $2); }
1174 | declarator maybeasm maybe_attribute
1175 { tree d = start_decl ($1, current_declspecs, 0,
1176 $3, prefix_attributes);
1177 finish_decl (d, NULL_TREE, $2);
1178 }
1179 ;
1180
1181 notype_initdcl:
1182 notype_declarator maybeasm maybe_attribute '='
1183 { $<ttype>$ = start_decl ($1, current_declspecs, 1,
1184 $3, prefix_attributes);
1185 start_init ($<ttype>$, $2, global_bindings_p ()); }
1186 init
1187 /* Note how the declaration of the variable is in effect while its init is parsed! */
1188 { finish_init ();
1189 decl_attributes ($<ttype>5, $3, prefix_attributes);
1190 finish_decl ($<ttype>5, $6, $2); }
1191 | notype_declarator maybeasm maybe_attribute
1192 { tree d = start_decl ($1, current_declspecs, 0,
1193 $3, prefix_attributes);
1194 finish_decl (d, NULL_TREE, $2); }
1195 ;
1196 /* the * rules are dummies to accept the Apollo extended syntax
1197 so that the header files compile. */
1198 maybe_attribute:
1199 /* empty */
1200 { $$ = NULL_TREE; }
1201 | attributes
1202 { $$ = $1; }
1203 ;
1204
1205 attributes:
1206 attribute
1207 { $$ = $1; }
1208 | attributes attribute
1209 { $$ = chainon ($1, $2); }
1210 ;
1211
1212 attribute:
1213 ATTRIBUTE '(' '(' attribute_list ')' ')'
1214 { $$ = $4; }
1215 ;
1216
1217 attribute_list:
1218 attrib
1219 { $$ = $1; }
1220 | attribute_list ',' attrib
1221 { $$ = chainon ($1, $3); }
1222 ;
1223
1224 attrib:
1225 /* empty */
1226 { $$ = NULL_TREE; }
1227 | any_word
1228 { $$ = build_tree_list ($1, NULL_TREE); }
1229 | any_word '(' IDENTIFIER ')'
1230 { $$ = build_tree_list ($1, build_tree_list (NULL_TREE, $3)); }
1231 | any_word '(' IDENTIFIER ',' nonnull_exprlist ')'
1232 { $$ = build_tree_list ($1, tree_cons (NULL_TREE, $3, $5)); }
1233 | any_word '(' exprlist ')'
1234 { $$ = build_tree_list ($1, $3); }
1235 ;
1236
1237 /* This still leaves out most reserved keywords,
1238 shouldn't we include them? */
1239
1240 any_word:
1241 identifier
1242 | SCSPEC
1243 | TYPESPEC
1244 | TYPE_QUAL
1245 ;
1246 \f
1247 /* Initializers. `init' is the entry point. */
1248
1249 init:
1250 expr_no_commas
1251 | '{'
1252 { really_start_incremental_init (NULL_TREE);
1253 /* Note that the call to clear_momentary
1254 is in process_init_element. */
1255 push_momentary (); }
1256 initlist_maybe_comma '}'
1257 { $$ = pop_init_level (0);
1258 if ($$ == error_mark_node
1259 && ! (yychar == STRING || yychar == CONSTANT))
1260 pop_momentary ();
1261 else
1262 pop_momentary_nofree (); }
1263
1264 | error
1265 { $$ = error_mark_node; }
1266 ;
1267
1268 /* `initlist_maybe_comma' is the guts of an initializer in braces. */
1269 initlist_maybe_comma:
1270 /* empty */
1271 { if (pedantic)
1272 pedwarn ("ANSI C forbids empty initializer braces"); }
1273 | initlist1 maybecomma
1274 ;
1275
1276 initlist1:
1277 initelt
1278 | initlist1 ',' initelt
1279 ;
1280
1281 /* `initelt' is a single element of an initializer.
1282 It may use braces. */
1283 initelt:
1284 expr_no_commas
1285 { process_init_element ($1); }
1286 | '{'
1287 { push_init_level (0); }
1288 initlist_maybe_comma '}'
1289 { process_init_element (pop_init_level (0)); }
1290 | error
1291 /* These are for labeled elements. The syntax for an array element
1292 initializer conflicts with the syntax for an Objective-C message,
1293 so don't include these productions in the Objective-C grammar. */
1294 ifc
1295 | '[' expr_no_commas ELLIPSIS expr_no_commas ']' '='
1296 { set_init_index ($2, $4); }
1297 initelt
1298 | '[' expr_no_commas ']' '='
1299 { set_init_index ($2, NULL_TREE); }
1300 initelt
1301 | '[' expr_no_commas ']'
1302 { set_init_index ($2, NULL_TREE); }
1303 initelt
1304 end ifc
1305 | identifier ':'
1306 { set_init_label ($1); }
1307 initelt
1308 | '.' identifier '='
1309 { set_init_label ($2); }
1310 initelt
1311 ;
1312 \f
1313 nested_function:
1314 declarator
1315 { push_c_function_context ();
1316 if (! start_function (current_declspecs, $1,
1317 prefix_attributes, NULL_TREE, 1))
1318 {
1319 pop_c_function_context ();
1320 YYERROR1;
1321 }
1322 reinit_parse_for_function (); }
1323 old_style_parm_decls
1324 { store_parm_decls (); }
1325 /* This used to use compstmt_or_error.
1326 That caused a bug with input `f(g) int g {}',
1327 where the use of YYERROR1 above caused an error
1328 which then was handled by compstmt_or_error.
1329 There followed a repeated execution of that same rule,
1330 which called YYERROR1 again, and so on. */
1331 compstmt
1332 { finish_function (1);
1333 pop_c_function_context (); }
1334 ;
1335
1336 notype_nested_function:
1337 notype_declarator
1338 { push_c_function_context ();
1339 if (! start_function (current_declspecs, $1,
1340 prefix_attributes, NULL_TREE, 1))
1341 {
1342 pop_c_function_context ();
1343 YYERROR1;
1344 }
1345 reinit_parse_for_function (); }
1346 old_style_parm_decls
1347 { store_parm_decls (); }
1348 /* This used to use compstmt_or_error.
1349 That caused a bug with input `f(g) int g {}',
1350 where the use of YYERROR1 above caused an error
1351 which then was handled by compstmt_or_error.
1352 There followed a repeated execution of that same rule,
1353 which called YYERROR1 again, and so on. */
1354 compstmt
1355 { finish_function (1);
1356 pop_c_function_context (); }
1357 ;
1358
1359 /* Any kind of declarator (thus, all declarators allowed
1360 after an explicit typespec). */
1361
1362 declarator:
1363 after_type_declarator
1364 | notype_declarator
1365 ;
1366
1367 /* A declarator that is allowed only after an explicit typespec. */
1368
1369 after_type_declarator:
1370 '(' after_type_declarator ')'
1371 { $$ = $2; }
1372 | after_type_declarator '(' parmlist_or_identifiers %prec '.'
1373 { $$ = build_nt (CALL_EXPR, $1, $3, NULL_TREE); }
1374 /* | after_type_declarator '(' error ')' %prec '.'
1375 { $$ = build_nt (CALL_EXPR, $1, NULL_TREE, NULL_TREE);
1376 poplevel (0, 0, 0); } */
1377 | after_type_declarator '[' expr ']' %prec '.'
1378 { $$ = build_nt (ARRAY_REF, $1, $3); }
1379 | after_type_declarator '[' ']' %prec '.'
1380 { $$ = build_nt (ARRAY_REF, $1, NULL_TREE); }
1381 | '*' type_quals after_type_declarator %prec UNARY
1382 { $$ = make_pointer_declarator ($2, $3); }
1383 /* ??? Yuck. setattrs is a quick hack. We can't use
1384 prefix_attributes because $1 only applies to this
1385 declarator. We assume setspecs has already been done.
1386 setattrs also avoids 5 reduce/reduce conflicts (otherwise multiple
1387 attributes could be recognized here or in `attributes'). */
1388 | attributes setattrs after_type_declarator
1389 { $$ = $3; }
1390 | TYPENAME
1391 ifobjc
1392 | OBJECTNAME
1393 end ifobjc
1394 ;
1395
1396 /* Kinds of declarator that can appear in a parameter list
1397 in addition to notype_declarator. This is like after_type_declarator
1398 but does not allow a typedef name in parentheses as an identifier
1399 (because it would conflict with a function with that typedef as arg). */
1400
1401 parm_declarator:
1402 parm_declarator '(' parmlist_or_identifiers %prec '.'
1403 { $$ = build_nt (CALL_EXPR, $1, $3, NULL_TREE); }
1404 /* | parm_declarator '(' error ')' %prec '.'
1405 { $$ = build_nt (CALL_EXPR, $1, NULL_TREE, NULL_TREE);
1406 poplevel (0, 0, 0); } */
1407 | parm_declarator '[' expr ']' %prec '.'
1408 { $$ = build_nt (ARRAY_REF, $1, $3); }
1409 | parm_declarator '[' ']' %prec '.'
1410 { $$ = build_nt (ARRAY_REF, $1, NULL_TREE); }
1411 | '*' type_quals parm_declarator %prec UNARY
1412 { $$ = make_pointer_declarator ($2, $3); }
1413 /* ??? Yuck. setattrs is a quick hack. We can't use
1414 prefix_attributes because $1 only applies to this
1415 declarator. We assume setspecs has already been done.
1416 setattrs also avoids 5 reduce/reduce conflicts (otherwise multiple
1417 attributes could be recognized here or in `attributes'). */
1418 | attributes setattrs parm_declarator
1419 { $$ = $3; }
1420 | TYPENAME
1421 ;
1422
1423 /* A declarator allowed whether or not there has been
1424 an explicit typespec. These cannot redeclare a typedef-name. */
1425
1426 notype_declarator:
1427 notype_declarator '(' parmlist_or_identifiers %prec '.'
1428 { $$ = build_nt (CALL_EXPR, $1, $3, NULL_TREE); }
1429 /* | notype_declarator '(' error ')' %prec '.'
1430 { $$ = build_nt (CALL_EXPR, $1, NULL_TREE, NULL_TREE);
1431 poplevel (0, 0, 0); } */
1432 | '(' notype_declarator ')'
1433 { $$ = $2; }
1434 | '*' type_quals notype_declarator %prec UNARY
1435 { $$ = make_pointer_declarator ($2, $3); }
1436 | notype_declarator '[' expr ']' %prec '.'
1437 { $$ = build_nt (ARRAY_REF, $1, $3); }
1438 | notype_declarator '[' ']' %prec '.'
1439 { $$ = build_nt (ARRAY_REF, $1, NULL_TREE); }
1440 /* ??? Yuck. setattrs is a quick hack. We can't use
1441 prefix_attributes because $1 only applies to this
1442 declarator. We assume setspecs has already been done.
1443 setattrs also avoids 5 reduce/reduce conflicts (otherwise multiple
1444 attributes could be recognized here or in `attributes'). */
1445 | attributes setattrs notype_declarator
1446 { $$ = $3; }
1447 | IDENTIFIER
1448 ;
1449
1450 structsp:
1451 STRUCT identifier '{'
1452 { $$ = start_struct (RECORD_TYPE, $2);
1453 /* Start scope of tag before parsing components. */
1454 }
1455 component_decl_list '}' maybe_attribute
1456 { $$ = finish_struct ($<ttype>4, $5, $7); }
1457 | STRUCT '{' component_decl_list '}' maybe_attribute
1458 { $$ = finish_struct (start_struct (RECORD_TYPE, NULL_TREE),
1459 $3, $5);
1460 }
1461 | STRUCT identifier
1462 { $$ = xref_tag (RECORD_TYPE, $2); }
1463 | UNION identifier '{'
1464 { $$ = start_struct (UNION_TYPE, $2); }
1465 component_decl_list '}' maybe_attribute
1466 { $$ = finish_struct ($<ttype>4, $5, $7); }
1467 | UNION '{' component_decl_list '}' maybe_attribute
1468 { $$ = finish_struct (start_struct (UNION_TYPE, NULL_TREE),
1469 $3, $5);
1470 }
1471 | UNION identifier
1472 { $$ = xref_tag (UNION_TYPE, $2); }
1473 | ENUM identifier '{'
1474 { $<itype>3 = suspend_momentary ();
1475 $$ = start_enum ($2); }
1476 enumlist maybecomma_warn '}' maybe_attribute
1477 { $$ = finish_enum ($<ttype>4, nreverse ($5), $8);
1478 resume_momentary ($<itype>3); }
1479 | ENUM '{'
1480 { $<itype>2 = suspend_momentary ();
1481 $$ = start_enum (NULL_TREE); }
1482 enumlist maybecomma_warn '}' maybe_attribute
1483 { $$ = finish_enum ($<ttype>3, nreverse ($4), $7);
1484 resume_momentary ($<itype>2); }
1485 | ENUM identifier
1486 { $$ = xref_tag (ENUMERAL_TYPE, $2); }
1487 ;
1488
1489 maybecomma:
1490 /* empty */
1491 | ','
1492 ;
1493
1494 maybecomma_warn:
1495 /* empty */
1496 | ','
1497 { if (pedantic) pedwarn ("comma at end of enumerator list"); }
1498 ;
1499
1500 component_decl_list:
1501 component_decl_list2
1502 { $$ = $1; }
1503 | component_decl_list2 component_decl
1504 { $$ = chainon ($1, $2);
1505 pedwarn ("no semicolon at end of struct or union"); }
1506 ;
1507
1508 component_decl_list2: /* empty */
1509 { $$ = NULL_TREE; }
1510 | component_decl_list2 component_decl ';'
1511 { $$ = chainon ($1, $2); }
1512 | component_decl_list2 ';'
1513 { if (pedantic)
1514 pedwarn ("extra semicolon in struct or union specified"); }
1515 ifobjc
1516 /* foo(sizeof(struct{ @defs(ClassName)})); */
1517 | DEFS '(' CLASSNAME ')'
1518 {
1519 tree interface = lookup_interface ($3);
1520
1521 if (interface)
1522 $$ = get_class_ivars (interface);
1523 else
1524 {
1525 error ("Cannot find interface declaration for `%s'",
1526 IDENTIFIER_POINTER ($3));
1527 $$ = NULL_TREE;
1528 }
1529 }
1530 end ifobjc
1531 ;
1532
1533 /* There is a shift-reduce conflict here, because `components' may
1534 start with a `typename'. It happens that shifting (the default resolution)
1535 does the right thing, because it treats the `typename' as part of
1536 a `typed_typespecs'.
1537
1538 It is possible that this same technique would allow the distinction
1539 between `notype_initdecls' and `initdecls' to be eliminated.
1540 But I am being cautious and not trying it. */
1541
1542 component_decl:
1543 typed_typespecs setspecs components
1544 { $$ = $3;
1545 current_declspecs = TREE_VALUE (declspec_stack);
1546 prefix_attributes = TREE_PURPOSE (declspec_stack);
1547 declspec_stack = TREE_CHAIN (declspec_stack);
1548 resume_momentary ($2); }
1549 | typed_typespecs
1550 { if (pedantic)
1551 pedwarn ("ANSI C forbids member declarations with no members");
1552 shadow_tag($1);
1553 $$ = NULL_TREE; }
1554 | nonempty_type_quals setspecs components
1555 { $$ = $3;
1556 current_declspecs = TREE_VALUE (declspec_stack);
1557 prefix_attributes = TREE_PURPOSE (declspec_stack);
1558 declspec_stack = TREE_CHAIN (declspec_stack);
1559 resume_momentary ($2); }
1560 | nonempty_type_quals
1561 { if (pedantic)
1562 pedwarn ("ANSI C forbids member declarations with no members");
1563 shadow_tag($1);
1564 $$ = NULL_TREE; }
1565 | error
1566 { $$ = NULL_TREE; }
1567 | extension component_decl
1568 { $$ = $2;
1569 pedantic = $<itype>1; }
1570 ;
1571
1572 components:
1573 component_declarator
1574 | components ',' component_declarator
1575 { $$ = chainon ($1, $3); }
1576 ;
1577
1578 component_declarator:
1579 save_filename save_lineno declarator maybe_attribute
1580 { $$ = grokfield ($1, $2, $3, current_declspecs, NULL_TREE);
1581 decl_attributes ($$, $4, prefix_attributes); }
1582 | save_filename save_lineno
1583 declarator ':' expr_no_commas maybe_attribute
1584 { $$ = grokfield ($1, $2, $3, current_declspecs, $5);
1585 decl_attributes ($$, $6, prefix_attributes); }
1586 | save_filename save_lineno ':' expr_no_commas maybe_attribute
1587 { $$ = grokfield ($1, $2, NULL_TREE, current_declspecs, $4);
1588 decl_attributes ($$, $5, prefix_attributes); }
1589 ;
1590
1591 /* We chain the enumerators in reverse order.
1592 They are put in forward order where enumlist is used.
1593 (The order used to be significant, but no longer is so.
1594 However, we still maintain the order, just to be clean.) */
1595
1596 enumlist:
1597 enumerator
1598 | enumlist ',' enumerator
1599 { if ($1 == error_mark_node)
1600 $$ = $1;
1601 else
1602 $$ = chainon ($3, $1); }
1603 | error
1604 { $$ = error_mark_node; }
1605 ;
1606
1607
1608 enumerator:
1609 identifier
1610 { $$ = build_enumerator ($1, NULL_TREE); }
1611 | identifier '=' expr_no_commas
1612 { $$ = build_enumerator ($1, $3); }
1613 ;
1614
1615 typename:
1616 typed_typespecs absdcl
1617 { $$ = build_tree_list ($1, $2); }
1618 | nonempty_type_quals absdcl
1619 { $$ = build_tree_list ($1, $2); }
1620 ;
1621
1622 absdcl: /* an absolute declarator */
1623 /* empty */
1624 { $$ = NULL_TREE; }
1625 | absdcl1
1626 ;
1627
1628 nonempty_type_quals:
1629 TYPE_QUAL
1630 { $$ = tree_cons (NULL_TREE, $1, NULL_TREE); }
1631 | nonempty_type_quals TYPE_QUAL
1632 { $$ = tree_cons (NULL_TREE, $2, $1); }
1633 ;
1634
1635 type_quals:
1636 /* empty */
1637 { $$ = NULL_TREE; }
1638 | type_quals TYPE_QUAL
1639 { $$ = tree_cons (NULL_TREE, $2, $1); }
1640 ;
1641
1642 absdcl1: /* a nonempty absolute declarator */
1643 '(' absdcl1 ')'
1644 { $$ = $2; }
1645 /* `(typedef)1' is `int'. */
1646 | '*' type_quals absdcl1 %prec UNARY
1647 { $$ = make_pointer_declarator ($2, $3); }
1648 | '*' type_quals %prec UNARY
1649 { $$ = make_pointer_declarator ($2, NULL_TREE); }
1650 | absdcl1 '(' parmlist %prec '.'
1651 { $$ = build_nt (CALL_EXPR, $1, $3, NULL_TREE); }
1652 | absdcl1 '[' expr ']' %prec '.'
1653 { $$ = build_nt (ARRAY_REF, $1, $3); }
1654 | absdcl1 '[' ']' %prec '.'
1655 { $$ = build_nt (ARRAY_REF, $1, NULL_TREE); }
1656 | '(' parmlist %prec '.'
1657 { $$ = build_nt (CALL_EXPR, NULL_TREE, $2, NULL_TREE); }
1658 | '[' expr ']' %prec '.'
1659 { $$ = build_nt (ARRAY_REF, NULL_TREE, $2); }
1660 | '[' ']' %prec '.'
1661 { $$ = build_nt (ARRAY_REF, NULL_TREE, NULL_TREE); }
1662 /* ??? It appears we have to support attributes here, however
1663 using prefix_attributes is wrong. */
1664 ;
1665
1666 /* at least one statement, the first of which parses without error. */
1667 /* stmts is used only after decls, so an invalid first statement
1668 is actually regarded as an invalid decl and part of the decls. */
1669
1670 stmts:
1671 lineno_stmt_or_labels
1672 {
1673 if (pedantic && $1)
1674 pedwarn ("ANSI C forbids label at end of compound statement");
1675 }
1676 ;
1677
1678 lineno_stmt_or_labels:
1679 lineno_stmt_or_label
1680 | lineno_stmt_or_labels lineno_stmt_or_label
1681 { $$ = $2; }
1682 | lineno_stmt_or_labels errstmt
1683 { $$ = 0; }
1684 ;
1685
1686 xstmts:
1687 /* empty */
1688 | stmts
1689 ;
1690
1691 errstmt: error ';'
1692 ;
1693
1694 pushlevel: /* empty */
1695 { emit_line_note (input_filename, lineno);
1696 pushlevel (0);
1697 clear_last_expr ();
1698 push_momentary ();
1699 expand_start_bindings (0);
1700 ifobjc
1701 if (objc_method_context)
1702 add_objc_decls ();
1703 end ifobjc
1704 }
1705 ;
1706
1707 /* Read zero or more forward-declarations for labels
1708 that nested functions can jump to. */
1709 maybe_label_decls:
1710 /* empty */
1711 | label_decls
1712 { if (pedantic)
1713 pedwarn ("ANSI C forbids label declarations"); }
1714 ;
1715
1716 label_decls:
1717 label_decl
1718 | label_decls label_decl
1719 ;
1720
1721 label_decl:
1722 LABEL identifiers_or_typenames ';'
1723 { tree link;
1724 for (link = $2; link; link = TREE_CHAIN (link))
1725 {
1726 tree label = shadow_label (TREE_VALUE (link));
1727 C_DECLARED_LABEL_FLAG (label) = 1;
1728 declare_nonlocal_label (label);
1729 }
1730 }
1731 ;
1732
1733 /* This is the body of a function definition.
1734 It causes syntax errors to ignore to the next openbrace. */
1735 compstmt_or_error:
1736 compstmt
1737 {}
1738 | error compstmt
1739 ;
1740
1741 compstmt_start: '{' { compstmt_count++; }
1742
1743 compstmt: compstmt_start '}'
1744 { $$ = convert (void_type_node, integer_zero_node); }
1745 | compstmt_start pushlevel maybe_label_decls decls xstmts '}'
1746 { emit_line_note (input_filename, lineno);
1747 expand_end_bindings (getdecls (), 1, 0);
1748 $$ = poplevel (1, 1, 0);
1749 if (yychar == CONSTANT || yychar == STRING)
1750 pop_momentary_nofree ();
1751 else
1752 pop_momentary (); }
1753 | compstmt_start pushlevel maybe_label_decls error '}'
1754 { emit_line_note (input_filename, lineno);
1755 expand_end_bindings (getdecls (), kept_level_p (), 0);
1756 $$ = poplevel (kept_level_p (), 0, 0);
1757 if (yychar == CONSTANT || yychar == STRING)
1758 pop_momentary_nofree ();
1759 else
1760 pop_momentary (); }
1761 | compstmt_start pushlevel maybe_label_decls stmts '}'
1762 { emit_line_note (input_filename, lineno);
1763 expand_end_bindings (getdecls (), kept_level_p (), 0);
1764 $$ = poplevel (kept_level_p (), 0, 0);
1765 if (yychar == CONSTANT || yychar == STRING)
1766 pop_momentary_nofree ();
1767 else
1768 pop_momentary (); }
1769 ;
1770
1771 /* Value is number of statements counted as of the closeparen. */
1772 simple_if:
1773 if_prefix lineno_labeled_stmt
1774 /* Make sure c_expand_end_cond is run once
1775 for each call to c_expand_start_cond.
1776 Otherwise a crash is likely. */
1777 | if_prefix error
1778 ;
1779
1780 if_prefix:
1781 IF '(' expr ')'
1782 { emit_line_note ($<filename>-1, $<lineno>0);
1783 c_expand_start_cond (truthvalue_conversion ($3), 0,
1784 compstmt_count);
1785 $<itype>$ = stmt_count;
1786 if_stmt_file = $<filename>-1;
1787 if_stmt_line = $<lineno>0;
1788 position_after_white_space (); }
1789 ;
1790
1791 /* This is a subroutine of stmt.
1792 It is used twice, once for valid DO statements
1793 and once for catching errors in parsing the end test. */
1794 do_stmt_start:
1795 DO
1796 { stmt_count++;
1797 compstmt_count++;
1798 emit_line_note ($<filename>-1, $<lineno>0);
1799 /* See comment in `while' alternative, above. */
1800 emit_nop ();
1801 expand_start_loop_continue_elsewhere (1);
1802 position_after_white_space (); }
1803 lineno_labeled_stmt WHILE
1804 { expand_loop_continue_here (); }
1805 ;
1806
1807 save_filename:
1808 { $$ = input_filename; }
1809 ;
1810
1811 save_lineno:
1812 { $$ = lineno; }
1813 ;
1814
1815 lineno_labeled_stmt:
1816 save_filename save_lineno stmt
1817 { }
1818 /* | save_filename save_lineno error
1819 { }
1820 */
1821 | save_filename save_lineno label lineno_labeled_stmt
1822 { }
1823 ;
1824
1825 lineno_stmt_or_label:
1826 save_filename save_lineno stmt_or_label
1827 { $$ = $3; }
1828 ;
1829
1830 stmt_or_label:
1831 stmt
1832 { $$ = 0; }
1833 | label
1834 { $$ = 1; }
1835 ;
1836
1837 /* Parse a single real statement, not including any labels. */
1838 stmt:
1839 compstmt
1840 { stmt_count++; }
1841 | all_iter_stmt
1842 | expr ';'
1843 { stmt_count++;
1844 emit_line_note ($<filename>-1, $<lineno>0);
1845 /* It appears that this should not be done--that a non-lvalue array
1846 shouldn't get an error if the value isn't used.
1847 Section 3.2.2.1 says that an array lvalue gets converted to a pointer
1848 if it appears as a top-level expression,
1849 but says nothing about non-lvalue arrays. */
1850 #if 0
1851 /* Call default_conversion to get an error
1852 on referring to a register array if pedantic. */
1853 if (TREE_CODE (TREE_TYPE ($1)) == ARRAY_TYPE
1854 || TREE_CODE (TREE_TYPE ($1)) == FUNCTION_TYPE)
1855 $1 = default_conversion ($1);
1856 #endif
1857 iterator_expand ($1);
1858 clear_momentary (); }
1859 | simple_if ELSE
1860 { c_expand_start_else ();
1861 $<itype>1 = stmt_count;
1862 position_after_white_space (); }
1863 lineno_labeled_stmt
1864 { c_expand_end_cond ();
1865 if (extra_warnings && stmt_count == $<itype>1)
1866 warning ("empty body in an else-statement"); }
1867 | simple_if %prec IF
1868 { c_expand_end_cond ();
1869 /* This warning is here instead of in simple_if, because we
1870 do not want a warning if an empty if is followed by an
1871 else statement. Increment stmt_count so we don't
1872 give a second error if this is a nested `if'. */
1873 if (extra_warnings && stmt_count++ == $<itype>1)
1874 warning_with_file_and_line (if_stmt_file, if_stmt_line,
1875 "empty body in an if-statement"); }
1876 /* Make sure c_expand_end_cond is run once
1877 for each call to c_expand_start_cond.
1878 Otherwise a crash is likely. */
1879 | simple_if ELSE error
1880 { c_expand_end_cond (); }
1881 | WHILE
1882 { stmt_count++;
1883 emit_line_note ($<filename>-1, $<lineno>0);
1884 /* The emit_nop used to come before emit_line_note,
1885 but that made the nop seem like part of the preceding line.
1886 And that was confusing when the preceding line was
1887 inside of an if statement and was not really executed.
1888 I think it ought to work to put the nop after the line number.
1889 We will see. --rms, July 15, 1991. */
1890 emit_nop (); }
1891 '(' expr ')'
1892 { /* Don't start the loop till we have succeeded
1893 in parsing the end test. This is to make sure
1894 that we end every loop we start. */
1895 expand_start_loop (1);
1896 emit_line_note (input_filename, lineno);
1897 expand_exit_loop_if_false (NULL_PTR,
1898 truthvalue_conversion ($4));
1899 position_after_white_space (); }
1900 lineno_labeled_stmt
1901 { expand_end_loop (); }
1902 | do_stmt_start
1903 '(' expr ')' ';'
1904 { emit_line_note (input_filename, lineno);
1905 expand_exit_loop_if_false (NULL_PTR,
1906 truthvalue_conversion ($3));
1907 expand_end_loop ();
1908 clear_momentary (); }
1909 /* This rule is needed to make sure we end every loop we start. */
1910 | do_stmt_start error
1911 { expand_end_loop ();
1912 clear_momentary (); }
1913 | FOR
1914 '(' xexpr ';'
1915 { stmt_count++;
1916 emit_line_note ($<filename>-1, $<lineno>0);
1917 /* See comment in `while' alternative, above. */
1918 emit_nop ();
1919 if ($3) c_expand_expr_stmt ($3);
1920 /* Next step is to call expand_start_loop_continue_elsewhere,
1921 but wait till after we parse the entire for (...).
1922 Otherwise, invalid input might cause us to call that
1923 fn without calling expand_end_loop. */
1924 }
1925 xexpr ';'
1926 /* Can't emit now; wait till after expand_start_loop... */
1927 { $<lineno>7 = lineno;
1928 $<filename>$ = input_filename; }
1929 xexpr ')'
1930 {
1931 /* Start the loop. Doing this after parsing
1932 all the expressions ensures we will end the loop. */
1933 expand_start_loop_continue_elsewhere (1);
1934 /* Emit the end-test, with a line number. */
1935 emit_line_note ($<filename>8, $<lineno>7);
1936 if ($6)
1937 expand_exit_loop_if_false (NULL_PTR,
1938 truthvalue_conversion ($6));
1939 /* Don't let the tree nodes for $9 be discarded by
1940 clear_momentary during the parsing of the next stmt. */
1941 push_momentary ();
1942 $<lineno>7 = lineno;
1943 $<filename>8 = input_filename;
1944 position_after_white_space (); }
1945 lineno_labeled_stmt
1946 { /* Emit the increment expression, with a line number. */
1947 emit_line_note ($<filename>8, $<lineno>7);
1948 expand_loop_continue_here ();
1949 if ($9)
1950 c_expand_expr_stmt ($9);
1951 if (yychar == CONSTANT || yychar == STRING)
1952 pop_momentary_nofree ();
1953 else
1954 pop_momentary ();
1955 expand_end_loop (); }
1956 | SWITCH '(' expr ')'
1957 { stmt_count++;
1958 emit_line_note ($<filename>-1, $<lineno>0);
1959 c_expand_start_case ($3);
1960 /* Don't let the tree nodes for $3 be discarded by
1961 clear_momentary during the parsing of the next stmt. */
1962 push_momentary ();
1963 position_after_white_space (); }
1964 lineno_labeled_stmt
1965 { expand_end_case ($3);
1966 if (yychar == CONSTANT || yychar == STRING)
1967 pop_momentary_nofree ();
1968 else
1969 pop_momentary (); }
1970 | BREAK ';'
1971 { stmt_count++;
1972 emit_line_note ($<filename>-1, $<lineno>0);
1973 if ( ! expand_exit_something ())
1974 error ("break statement not within loop or switch"); }
1975 | CONTINUE ';'
1976 { stmt_count++;
1977 emit_line_note ($<filename>-1, $<lineno>0);
1978 if (! expand_continue_loop (NULL_PTR))
1979 error ("continue statement not within a loop"); }
1980 | RETURN ';'
1981 { stmt_count++;
1982 emit_line_note ($<filename>-1, $<lineno>0);
1983 c_expand_return (NULL_TREE); }
1984 | RETURN expr ';'
1985 { stmt_count++;
1986 emit_line_note ($<filename>-1, $<lineno>0);
1987 c_expand_return ($2); }
1988 | ASM_KEYWORD maybe_type_qual '(' expr ')' ';'
1989 { stmt_count++;
1990 emit_line_note ($<filename>-1, $<lineno>0);
1991 STRIP_NOPS ($4);
1992 if ((TREE_CODE ($4) == ADDR_EXPR
1993 && TREE_CODE (TREE_OPERAND ($4, 0)) == STRING_CST)
1994 || TREE_CODE ($4) == STRING_CST)
1995 expand_asm ($4);
1996 else
1997 error ("argument of `asm' is not a constant string"); }
1998 /* This is the case with just output operands. */
1999 | ASM_KEYWORD maybe_type_qual '(' expr ':' asm_operands ')' ';'
2000 { stmt_count++;
2001 emit_line_note ($<filename>-1, $<lineno>0);
2002 c_expand_asm_operands ($4, $6, NULL_TREE, NULL_TREE,
2003 $2 == ridpointers[(int)RID_VOLATILE],
2004 input_filename, lineno); }
2005 /* This is the case with input operands as well. */
2006 | ASM_KEYWORD maybe_type_qual '(' expr ':' asm_operands ':' asm_operands ')' ';'
2007 { stmt_count++;
2008 emit_line_note ($<filename>-1, $<lineno>0);
2009 c_expand_asm_operands ($4, $6, $8, NULL_TREE,
2010 $2 == ridpointers[(int)RID_VOLATILE],
2011 input_filename, lineno); }
2012 /* This is the case with clobbered registers as well. */
2013 | ASM_KEYWORD maybe_type_qual '(' expr ':' asm_operands ':'
2014 asm_operands ':' asm_clobbers ')' ';'
2015 { stmt_count++;
2016 emit_line_note ($<filename>-1, $<lineno>0);
2017 c_expand_asm_operands ($4, $6, $8, $10,
2018 $2 == ridpointers[(int)RID_VOLATILE],
2019 input_filename, lineno); }
2020 | GOTO identifier ';'
2021 { tree decl;
2022 stmt_count++;
2023 emit_line_note ($<filename>-1, $<lineno>0);
2024 decl = lookup_label ($2);
2025 if (decl != 0)
2026 {
2027 TREE_USED (decl) = 1;
2028 expand_goto (decl);
2029 }
2030 }
2031 | GOTO '*' expr ';'
2032 { if (pedantic)
2033 pedwarn ("ANSI C forbids `goto *expr;'");
2034 stmt_count++;
2035 emit_line_note ($<filename>-1, $<lineno>0);
2036 expand_computed_goto (convert (ptr_type_node, $3)); }
2037 | ';'
2038 ;
2039
2040 all_iter_stmt:
2041 all_iter_stmt_simple
2042 /* | all_iter_stmt_with_decl */
2043 ;
2044
2045 all_iter_stmt_simple:
2046 FOR '(' primary ')'
2047 {
2048 /* The value returned by this action is */
2049 /* 1 if everything is OK */
2050 /* 0 in case of error or already bound iterator */
2051
2052 $<itype>$ = 0;
2053 if (TREE_CODE ($3) != VAR_DECL)
2054 error ("invalid `for (ITERATOR)' syntax");
2055 else if (! ITERATOR_P ($3))
2056 error ("`%s' is not an iterator",
2057 IDENTIFIER_POINTER (DECL_NAME ($3)));
2058 else if (ITERATOR_BOUND_P ($3))
2059 error ("`for (%s)' inside expansion of same iterator",
2060 IDENTIFIER_POINTER (DECL_NAME ($3)));
2061 else
2062 {
2063 $<itype>$ = 1;
2064 iterator_for_loop_start ($3);
2065 }
2066 }
2067 lineno_labeled_stmt
2068 {
2069 if ($<itype>5)
2070 iterator_for_loop_end ($3);
2071 }
2072
2073 /* This really should allow any kind of declaration,
2074 for generality. Fix it before turning it back on.
2075
2076 all_iter_stmt_with_decl:
2077 FOR '(' ITERATOR pushlevel setspecs iterator_spec ')'
2078 {
2079 */ /* The value returned by this action is */
2080 /* 1 if everything is OK */
2081 /* 0 in case of error or already bound iterator */
2082 /*
2083 iterator_for_loop_start ($6);
2084 }
2085 lineno_labeled_stmt
2086 {
2087 iterator_for_loop_end ($6);
2088 emit_line_note (input_filename, lineno);
2089 expand_end_bindings (getdecls (), 1, 0);
2090 $<ttype>$ = poplevel (1, 1, 0);
2091 if (yychar == CONSTANT || yychar == STRING)
2092 pop_momentary_nofree ();
2093 else
2094 pop_momentary ();
2095 }
2096 */
2097
2098 /* Any kind of label, including jump labels and case labels.
2099 ANSI C accepts labels only before statements, but we allow them
2100 also at the end of a compound statement. */
2101
2102 label: CASE expr_no_commas ':'
2103 { register tree value = check_case_value ($2);
2104 register tree label
2105 = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE);
2106
2107 stmt_count++;
2108
2109 if (value != error_mark_node)
2110 {
2111 tree duplicate;
2112 int success = pushcase (value, convert_and_check,
2113 label, &duplicate);
2114 if (success == 1)
2115 error ("case label not within a switch statement");
2116 else if (success == 2)
2117 {
2118 error ("duplicate case value");
2119 error_with_decl (duplicate, "this is the first entry for that value");
2120 }
2121 else if (success == 3)
2122 warning ("case value out of range");
2123 else if (success == 5)
2124 error ("case label within scope of cleanup or variable array");
2125 }
2126 position_after_white_space (); }
2127 | CASE expr_no_commas ELLIPSIS expr_no_commas ':'
2128 { register tree value1 = check_case_value ($2);
2129 register tree value2 = check_case_value ($4);
2130 register tree label
2131 = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE);
2132
2133 if (pedantic)
2134 pedwarn ("ANSI C forbids case ranges");
2135 stmt_count++;
2136
2137 if (value1 != error_mark_node && value2 != error_mark_node)
2138 {
2139 tree duplicate;
2140 int success = pushcase_range (value1, value2,
2141 convert_and_check, label,
2142 &duplicate);
2143 if (success == 1)
2144 error ("case label not within a switch statement");
2145 else if (success == 2)
2146 {
2147 error ("duplicate case value");
2148 error_with_decl (duplicate, "this is the first entry for that value");
2149 }
2150 else if (success == 3)
2151 warning ("case value out of range");
2152 else if (success == 4)
2153 warning ("empty case range");
2154 else if (success == 5)
2155 error ("case label within scope of cleanup or variable array");
2156 }
2157 position_after_white_space (); }
2158 | DEFAULT ':'
2159 {
2160 tree duplicate;
2161 register tree label
2162 = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE);
2163 int success = pushcase (NULL_TREE, 0, label, &duplicate);
2164 stmt_count++;
2165 if (success == 1)
2166 error ("default label not within a switch statement");
2167 else if (success == 2)
2168 {
2169 error ("multiple default labels in one switch");
2170 error_with_decl (duplicate, "this is the first default label");
2171 }
2172 position_after_white_space (); }
2173 | identifier ':'
2174 { tree label = define_label (input_filename, lineno, $1);
2175 stmt_count++;
2176 emit_nop ();
2177 if (label)
2178 expand_label (label);
2179 position_after_white_space (); }
2180 ;
2181
2182 /* Either a type-qualifier or nothing. First thing in an `asm' statement. */
2183
2184 maybe_type_qual:
2185 /* empty */
2186 { emit_line_note (input_filename, lineno);
2187 $$ = NULL_TREE; }
2188 | TYPE_QUAL
2189 { emit_line_note (input_filename, lineno); }
2190 ;
2191
2192 xexpr:
2193 /* empty */
2194 { $$ = NULL_TREE; }
2195 | expr
2196 ;
2197
2198 /* These are the operands other than the first string and colon
2199 in asm ("addextend %2,%1": "=dm" (x), "0" (y), "g" (*x)) */
2200 asm_operands: /* empty */
2201 { $$ = NULL_TREE; }
2202 | nonnull_asm_operands
2203 ;
2204
2205 nonnull_asm_operands:
2206 asm_operand
2207 | nonnull_asm_operands ',' asm_operand
2208 { $$ = chainon ($1, $3); }
2209 ;
2210
2211 asm_operand:
2212 STRING '(' expr ')'
2213 { $$ = build_tree_list ($1, $3); }
2214 ;
2215
2216 asm_clobbers:
2217 string
2218 { $$ = tree_cons (NULL_TREE, combine_strings ($1), NULL_TREE); }
2219 | asm_clobbers ',' string
2220 { $$ = tree_cons (NULL_TREE, combine_strings ($3), $1); }
2221 ;
2222 \f
2223 /* This is what appears inside the parens in a function declarator.
2224 Its value is a list of ..._TYPE nodes. */
2225 parmlist:
2226 { pushlevel (0);
2227 clear_parm_order ();
2228 declare_parm_level (0); }
2229 parmlist_1
2230 { $$ = $2;
2231 parmlist_tags_warning ();
2232 poplevel (0, 0, 0); }
2233 ;
2234
2235 parmlist_1:
2236 parmlist_2 ')'
2237 | parms ';'
2238 { tree parm;
2239 if (pedantic)
2240 pedwarn ("ANSI C forbids forward parameter declarations");
2241 /* Mark the forward decls as such. */
2242 for (parm = getdecls (); parm; parm = TREE_CHAIN (parm))
2243 TREE_ASM_WRITTEN (parm) = 1;
2244 clear_parm_order (); }
2245 parmlist_1
2246 { $$ = $4; }
2247 | error ')'
2248 { $$ = tree_cons (NULL_TREE, NULL_TREE, NULL_TREE); }
2249 ;
2250
2251 /* This is what appears inside the parens in a function declarator.
2252 Is value is represented in the format that grokdeclarator expects. */
2253 parmlist_2: /* empty */
2254 { $$ = get_parm_info (0); }
2255 | ELLIPSIS
2256 { $$ = get_parm_info (0);
2257 /* Gcc used to allow this as an extension. However, it does
2258 not work for all targets, and thus has been disabled.
2259 Also, since func (...) and func () are indistinguishable,
2260 it caused problems with the code in expand_builtin which
2261 tries to verify that BUILT_IN_NEXT_ARG is being used
2262 correctly. */
2263 error ("ANSI C requires a named argument before `...'");
2264 }
2265 | parms
2266 { $$ = get_parm_info (1); }
2267 | parms ',' ELLIPSIS
2268 { $$ = get_parm_info (0); }
2269 ;
2270
2271 parms:
2272 parm
2273 { push_parm_decl ($1); }
2274 | parms ',' parm
2275 { push_parm_decl ($3); }
2276 ;
2277
2278 /* A single parameter declaration or parameter type name,
2279 as found in a parmlist. */
2280 parm:
2281 typed_declspecs setspecs parm_declarator maybe_attribute
2282 { $$ = build_tree_list (build_tree_list (current_declspecs,
2283 $3),
2284 build_tree_list (prefix_attributes,
2285 $4));
2286 current_declspecs = TREE_VALUE (declspec_stack);
2287 prefix_attributes = TREE_PURPOSE (declspec_stack);
2288 declspec_stack = TREE_CHAIN (declspec_stack);
2289 resume_momentary ($2); }
2290 | typed_declspecs setspecs notype_declarator maybe_attribute
2291 { $$ = build_tree_list (build_tree_list (current_declspecs,
2292 $3),
2293 build_tree_list (prefix_attributes,
2294 $4));
2295 current_declspecs = TREE_VALUE (declspec_stack);
2296 prefix_attributes = TREE_PURPOSE (declspec_stack);
2297 declspec_stack = TREE_CHAIN (declspec_stack);
2298 resume_momentary ($2); }
2299 | typed_declspecs setspecs absdcl maybe_attribute
2300 { $$ = build_tree_list (build_tree_list (current_declspecs,
2301 $3),
2302 build_tree_list (prefix_attributes,
2303 $4));
2304 current_declspecs = TREE_VALUE (declspec_stack);
2305 prefix_attributes = TREE_PURPOSE (declspec_stack);
2306 declspec_stack = TREE_CHAIN (declspec_stack);
2307 resume_momentary ($2); }
2308 | declmods setspecs notype_declarator maybe_attribute
2309 { $$ = build_tree_list (build_tree_list (current_declspecs,
2310 $3),
2311 build_tree_list (prefix_attributes,
2312 $4));
2313 current_declspecs = TREE_VALUE (declspec_stack);
2314 prefix_attributes = TREE_PURPOSE (declspec_stack);
2315 declspec_stack = TREE_CHAIN (declspec_stack);
2316 resume_momentary ($2); }
2317
2318 | declmods setspecs absdcl maybe_attribute
2319 { $$ = build_tree_list (build_tree_list (current_declspecs,
2320 $3),
2321 build_tree_list (prefix_attributes,
2322 $4));
2323 current_declspecs = TREE_VALUE (declspec_stack);
2324 prefix_attributes = TREE_PURPOSE (declspec_stack);
2325 declspec_stack = TREE_CHAIN (declspec_stack);
2326 resume_momentary ($2); }
2327 ;
2328
2329 /* This is used in a function definition
2330 where either a parmlist or an identifier list is ok.
2331 Its value is a list of ..._TYPE nodes or a list of identifiers. */
2332 parmlist_or_identifiers:
2333 { pushlevel (0);
2334 clear_parm_order ();
2335 declare_parm_level (1); }
2336 parmlist_or_identifiers_1
2337 { $$ = $2;
2338 parmlist_tags_warning ();
2339 poplevel (0, 0, 0); }
2340 ;
2341
2342 parmlist_or_identifiers_1:
2343 parmlist_1
2344 | identifiers ')'
2345 { tree t;
2346 for (t = $1; t; t = TREE_CHAIN (t))
2347 if (TREE_VALUE (t) == NULL_TREE)
2348 error ("`...' in old-style identifier list");
2349 $$ = tree_cons (NULL_TREE, NULL_TREE, $1); }
2350 ;
2351
2352 /* A nonempty list of identifiers. */
2353 identifiers:
2354 IDENTIFIER
2355 { $$ = build_tree_list (NULL_TREE, $1); }
2356 | identifiers ',' IDENTIFIER
2357 { $$ = chainon ($1, build_tree_list (NULL_TREE, $3)); }
2358 ;
2359
2360 /* A nonempty list of identifiers, including typenames. */
2361 identifiers_or_typenames:
2362 identifier
2363 { $$ = build_tree_list (NULL_TREE, $1); }
2364 | identifiers_or_typenames ',' identifier
2365 { $$ = chainon ($1, build_tree_list (NULL_TREE, $3)); }
2366 ;
2367
2368 extension:
2369 EXTENSION
2370 { $<itype>$ = pedantic;
2371 pedantic = 0; }
2372 ;
2373 \f
2374 ifobjc
2375 /* Objective-C productions. */
2376
2377 objcdef:
2378 classdef
2379 | classdecl
2380 | aliasdecl
2381 | protocoldef
2382 | methoddef
2383 | END
2384 {
2385 if (objc_implementation_context)
2386 {
2387 finish_class (objc_implementation_context);
2388 objc_ivar_chain = NULL_TREE;
2389 objc_implementation_context = NULL_TREE;
2390 }
2391 else
2392 warning ("`@end' must appear in an implementation context");
2393 }
2394 ;
2395
2396 /* A nonempty list of identifiers. */
2397 identifier_list:
2398 identifier
2399 { $$ = build_tree_list (NULL_TREE, $1); }
2400 | identifier_list ',' identifier
2401 { $$ = chainon ($1, build_tree_list (NULL_TREE, $3)); }
2402 ;
2403
2404 classdecl:
2405 CLASS identifier_list ';'
2406 {
2407 objc_declare_class ($2);
2408 }
2409
2410 aliasdecl:
2411 ALIAS identifier identifier ';'
2412 {
2413 objc_declare_alias ($2, $3);
2414 }
2415
2416 classdef:
2417 INTERFACE identifier protocolrefs '{'
2418 {
2419 objc_interface_context = objc_ivar_context
2420 = start_class (CLASS_INTERFACE_TYPE, $2, NULL_TREE, $3);
2421 objc_public_flag = 0;
2422 }
2423 ivar_decl_list '}'
2424 {
2425 continue_class (objc_interface_context);
2426 }
2427 methodprotolist
2428 END
2429 {
2430 finish_class (objc_interface_context);
2431 objc_interface_context = NULL_TREE;
2432 }
2433
2434 | INTERFACE identifier protocolrefs
2435 {
2436 objc_interface_context
2437 = start_class (CLASS_INTERFACE_TYPE, $2, NULL_TREE, $3);
2438 continue_class (objc_interface_context);
2439 }
2440 methodprotolist
2441 END
2442 {
2443 finish_class (objc_interface_context);
2444 objc_interface_context = NULL_TREE;
2445 }
2446
2447 | INTERFACE identifier ':' identifier protocolrefs '{'
2448 {
2449 objc_interface_context = objc_ivar_context
2450 = start_class (CLASS_INTERFACE_TYPE, $2, $4, $5);
2451 objc_public_flag = 0;
2452 }
2453 ivar_decl_list '}'
2454 {
2455 continue_class (objc_interface_context);
2456 }
2457 methodprotolist
2458 END
2459 {
2460 finish_class (objc_interface_context);
2461 objc_interface_context = NULL_TREE;
2462 }
2463
2464 | INTERFACE identifier ':' identifier protocolrefs
2465 {
2466 objc_interface_context
2467 = start_class (CLASS_INTERFACE_TYPE, $2, $4, $5);
2468 continue_class (objc_interface_context);
2469 }
2470 methodprotolist
2471 END
2472 {
2473 finish_class (objc_interface_context);
2474 objc_interface_context = NULL_TREE;
2475 }
2476
2477 | IMPLEMENTATION identifier '{'
2478 {
2479 objc_implementation_context = objc_ivar_context
2480 = start_class (CLASS_IMPLEMENTATION_TYPE, $2, NULL_TREE, NULL_TREE);
2481 objc_public_flag = 0;
2482 }
2483 ivar_decl_list '}'
2484 {
2485 objc_ivar_chain
2486 = continue_class (objc_implementation_context);
2487 }
2488
2489 | IMPLEMENTATION identifier
2490 {
2491 objc_implementation_context
2492 = start_class (CLASS_IMPLEMENTATION_TYPE, $2, NULL_TREE, NULL_TREE);
2493 objc_ivar_chain
2494 = continue_class (objc_implementation_context);
2495 }
2496
2497 | IMPLEMENTATION identifier ':' identifier '{'
2498 {
2499 objc_implementation_context = objc_ivar_context
2500 = start_class (CLASS_IMPLEMENTATION_TYPE, $2, $4, NULL_TREE);
2501 objc_public_flag = 0;
2502 }
2503 ivar_decl_list '}'
2504 {
2505 objc_ivar_chain
2506 = continue_class (objc_implementation_context);
2507 }
2508
2509 | IMPLEMENTATION identifier ':' identifier
2510 {
2511 objc_implementation_context
2512 = start_class (CLASS_IMPLEMENTATION_TYPE, $2, $4, NULL_TREE);
2513 objc_ivar_chain
2514 = continue_class (objc_implementation_context);
2515 }
2516
2517 | INTERFACE identifier '(' identifier ')' protocolrefs
2518 {
2519 objc_interface_context
2520 = start_class (CATEGORY_INTERFACE_TYPE, $2, $4, $6);
2521 continue_class (objc_interface_context);
2522 }
2523 methodprotolist
2524 END
2525 {
2526 finish_class (objc_interface_context);
2527 objc_interface_context = NULL_TREE;
2528 }
2529
2530 | IMPLEMENTATION identifier '(' identifier ')'
2531 {
2532 objc_implementation_context
2533 = start_class (CATEGORY_IMPLEMENTATION_TYPE, $2, $4, NULL_TREE);
2534 objc_ivar_chain
2535 = continue_class (objc_implementation_context);
2536 }
2537 ;
2538
2539 protocoldef:
2540 PROTOCOL identifier protocolrefs
2541 {
2542 remember_protocol_qualifiers ();
2543 objc_interface_context
2544 = start_protocol(PROTOCOL_INTERFACE_TYPE, $2, $3);
2545 }
2546 methodprotolist END
2547 {
2548 forget_protocol_qualifiers();
2549 finish_protocol(objc_interface_context);
2550 objc_interface_context = NULL_TREE;
2551 }
2552 ;
2553
2554 protocolrefs:
2555 /* empty */
2556 {
2557 $$ = NULL_TREE;
2558 }
2559 | non_empty_protocolrefs
2560 ;
2561
2562 non_empty_protocolrefs:
2563 ARITHCOMPARE identifier_list ARITHCOMPARE
2564 {
2565 if ($1 == LT_EXPR && $3 == GT_EXPR)
2566 $$ = $2;
2567 else
2568 YYERROR1;
2569 }
2570 ;
2571
2572 ivar_decl_list:
2573 ivar_decl_list visibility_spec ivar_decls
2574 | ivar_decls
2575 ;
2576
2577 visibility_spec:
2578 PRIVATE { objc_public_flag = 2; }
2579 | PROTECTED { objc_public_flag = 0; }
2580 | PUBLIC { objc_public_flag = 1; }
2581 ;
2582
2583 ivar_decls:
2584 /* empty */
2585 {
2586 $$ = NULL_TREE;
2587 }
2588 | ivar_decls ivar_decl ';'
2589 | ivar_decls ';'
2590 {
2591 if (pedantic)
2592 pedwarn ("extra semicolon in struct or union specified");
2593 }
2594 ;
2595
2596
2597 /* There is a shift-reduce conflict here, because `components' may
2598 start with a `typename'. It happens that shifting (the default resolution)
2599 does the right thing, because it treats the `typename' as part of
2600 a `typed_typespecs'.
2601
2602 It is possible that this same technique would allow the distinction
2603 between `notype_initdecls' and `initdecls' to be eliminated.
2604 But I am being cautious and not trying it. */
2605
2606 ivar_decl:
2607 typed_typespecs setspecs ivars
2608 { $$ = $3;
2609 current_declspecs = TREE_VALUE (declspec_stack);
2610 prefix_attributes = TREE_PURPOSE (declspec_stack);
2611 declspec_stack = TREE_CHAIN (declspec_stack);
2612 resume_momentary ($2); }
2613 | nonempty_type_quals setspecs ivars
2614 { $$ = $3;
2615 current_declspecs = TREE_VALUE (declspec_stack);
2616 prefix_attributes = TREE_PURPOSE (declspec_stack);
2617 declspec_stack = TREE_CHAIN (declspec_stack);
2618 resume_momentary ($2); }
2619 | error
2620 { $$ = NULL_TREE; }
2621 ;
2622
2623 ivars:
2624 /* empty */
2625 { $$ = NULL_TREE; }
2626 | ivar_declarator
2627 | ivars ',' ivar_declarator
2628 ;
2629
2630 ivar_declarator:
2631 declarator
2632 {
2633 $$ = add_instance_variable (objc_ivar_context,
2634 objc_public_flag,
2635 $1, current_declspecs,
2636 NULL_TREE);
2637 }
2638 | declarator ':' expr_no_commas
2639 {
2640 $$ = add_instance_variable (objc_ivar_context,
2641 objc_public_flag,
2642 $1, current_declspecs, $3);
2643 }
2644 | ':' expr_no_commas
2645 {
2646 $$ = add_instance_variable (objc_ivar_context,
2647 objc_public_flag,
2648 NULL_TREE,
2649 current_declspecs, $2);
2650 }
2651 ;
2652
2653 methoddef:
2654 '+'
2655 {
2656 remember_protocol_qualifiers ();
2657 if (objc_implementation_context)
2658 objc_inherit_code = CLASS_METHOD_DECL;
2659 else
2660 fatal ("method definition not in class context");
2661 }
2662 methoddecl
2663 {
2664 forget_protocol_qualifiers ();
2665 add_class_method (objc_implementation_context, $3);
2666 start_method_def ($3);
2667 objc_method_context = $3;
2668 }
2669 optarglist
2670 {
2671 continue_method_def ();
2672 }
2673 compstmt_or_error
2674 {
2675 finish_method_def ();
2676 objc_method_context = NULL_TREE;
2677 }
2678
2679 | '-'
2680 {
2681 remember_protocol_qualifiers ();
2682 if (objc_implementation_context)
2683 objc_inherit_code = INSTANCE_METHOD_DECL;
2684 else
2685 fatal ("method definition not in class context");
2686 }
2687 methoddecl
2688 {
2689 forget_protocol_qualifiers ();
2690 add_instance_method (objc_implementation_context, $3);
2691 start_method_def ($3);
2692 objc_method_context = $3;
2693 }
2694 optarglist
2695 {
2696 continue_method_def ();
2697 }
2698 compstmt_or_error
2699 {
2700 finish_method_def ();
2701 objc_method_context = NULL_TREE;
2702 }
2703 ;
2704
2705 /* the reason for the strange actions in this rule
2706 is so that notype_initdecls when reached via datadef
2707 can find a valid list of type and sc specs in $0. */
2708
2709 methodprotolist:
2710 /* empty */
2711 | {$<ttype>$ = NULL_TREE; } methodprotolist2
2712 ;
2713
2714 methodprotolist2: /* eliminates a shift/reduce conflict */
2715 methodproto
2716 | datadef
2717 | methodprotolist2 methodproto
2718 | methodprotolist2 {$<ttype>$ = NULL_TREE; } datadef
2719 ;
2720
2721 semi_or_error:
2722 ';'
2723 | error
2724 ;
2725
2726 methodproto:
2727 '+'
2728 {
2729 objc_inherit_code = CLASS_METHOD_DECL;
2730 }
2731 methoddecl
2732 {
2733 add_class_method (objc_interface_context, $3);
2734 }
2735 semi_or_error
2736
2737 | '-'
2738 {
2739 objc_inherit_code = INSTANCE_METHOD_DECL;
2740 }
2741 methoddecl
2742 {
2743 add_instance_method (objc_interface_context, $3);
2744 }
2745 semi_or_error
2746 ;
2747
2748 methoddecl:
2749 '(' typename ')' unaryselector
2750 {
2751 $$ = build_method_decl (objc_inherit_code, $2, $4, NULL_TREE);
2752 }
2753
2754 | unaryselector
2755 {
2756 $$ = build_method_decl (objc_inherit_code, NULL_TREE, $1, NULL_TREE);
2757 }
2758
2759 | '(' typename ')' keywordselector optparmlist
2760 {
2761 $$ = build_method_decl (objc_inherit_code, $2, $4, $5);
2762 }
2763
2764 | keywordselector optparmlist
2765 {
2766 $$ = build_method_decl (objc_inherit_code, NULL_TREE, $1, $2);
2767 }
2768 ;
2769
2770 /* "optarglist" assumes that start_method_def has already been called...
2771 if it is not, the "xdecls" will not be placed in the proper scope */
2772
2773 optarglist:
2774 /* empty */
2775 | ';' myxdecls
2776 ;
2777
2778 /* to get around the following situation: "int foo (int a) int b; {}" that
2779 is synthesized when parsing "- a:a b:b; id c; id d; { ... }" */
2780
2781 myxdecls:
2782 /* empty */
2783 | mydecls
2784 ;
2785
2786 mydecls:
2787 mydecl
2788 | errstmt
2789 | mydecls mydecl
2790 | mydecl errstmt
2791 ;
2792
2793 mydecl:
2794 typed_declspecs setspecs myparms ';'
2795 { current_declspecs = TREE_VALUE (declspec_stack);
2796 prefix_attributes = TREE_PURPOSE (declspec_stack);
2797 declspec_stack = TREE_CHAIN (declspec_stack);
2798 resume_momentary ($2); }
2799 | typed_declspecs ';'
2800 { shadow_tag ($1); }
2801 | declmods ';'
2802 { pedwarn ("empty declaration"); }
2803 ;
2804
2805 myparms:
2806 myparm
2807 { push_parm_decl ($1); }
2808 | myparms ',' myparm
2809 { push_parm_decl ($3); }
2810 ;
2811
2812 /* A single parameter declaration or parameter type name,
2813 as found in a parmlist. DOES NOT ALLOW AN INITIALIZER OR ASMSPEC */
2814
2815 myparm:
2816 parm_declarator maybe_attribute
2817 { $$ = build_tree_list (build_tree_list (current_declspecs,
2818 $1),
2819 build_tree_list (prefix_attributes,
2820 $2)); }
2821 | notype_declarator maybe_attribute
2822 { $$ = build_tree_list (build_tree_list (current_declspecs,
2823 $1),
2824 build_tree_list (prefix_attributes,
2825 $2)); }
2826 | absdcl maybe_attribute
2827 { $$ = build_tree_list (build_tree_list (current_declspecs,
2828 $1),
2829 build_tree_list (prefix_attributes,
2830 $2)); }
2831 ;
2832
2833 optparmlist:
2834 /* empty */
2835 {
2836 $$ = NULL_TREE;
2837 }
2838 | ',' ELLIPSIS
2839 {
2840 /* oh what a kludge! */
2841 $$ = (tree)1;
2842 }
2843 | ','
2844 {
2845 pushlevel (0);
2846 }
2847 parmlist_2
2848 {
2849 /* returns a tree list node generated by get_parm_info */
2850 $$ = $3;
2851 poplevel (0, 0, 0);
2852 }
2853 ;
2854
2855 unaryselector:
2856 selector
2857 ;
2858
2859 keywordselector:
2860 keyworddecl
2861
2862 | keywordselector keyworddecl
2863 {
2864 $$ = chainon ($1, $2);
2865 }
2866 ;
2867
2868 selector:
2869 IDENTIFIER
2870 | TYPENAME
2871 | OBJECTNAME
2872 | reservedwords
2873 ;
2874
2875 reservedwords:
2876 ENUM { $$ = get_identifier (token_buffer); }
2877 | STRUCT { $$ = get_identifier (token_buffer); }
2878 | UNION { $$ = get_identifier (token_buffer); }
2879 | IF { $$ = get_identifier (token_buffer); }
2880 | ELSE { $$ = get_identifier (token_buffer); }
2881 | WHILE { $$ = get_identifier (token_buffer); }
2882 | DO { $$ = get_identifier (token_buffer); }
2883 | FOR { $$ = get_identifier (token_buffer); }
2884 | SWITCH { $$ = get_identifier (token_buffer); }
2885 | CASE { $$ = get_identifier (token_buffer); }
2886 | DEFAULT { $$ = get_identifier (token_buffer); }
2887 | BREAK { $$ = get_identifier (token_buffer); }
2888 | CONTINUE { $$ = get_identifier (token_buffer); }
2889 | RETURN { $$ = get_identifier (token_buffer); }
2890 | GOTO { $$ = get_identifier (token_buffer); }
2891 | ASM_KEYWORD { $$ = get_identifier (token_buffer); }
2892 | SIZEOF { $$ = get_identifier (token_buffer); }
2893 | TYPEOF { $$ = get_identifier (token_buffer); }
2894 | ALIGNOF { $$ = get_identifier (token_buffer); }
2895 | TYPESPEC | TYPE_QUAL
2896 ;
2897
2898 keyworddecl:
2899 selector ':' '(' typename ')' identifier
2900 {
2901 $$ = build_keyword_decl ($1, $4, $6);
2902 }
2903
2904 | selector ':' identifier
2905 {
2906 $$ = build_keyword_decl ($1, NULL_TREE, $3);
2907 }
2908
2909 | ':' '(' typename ')' identifier
2910 {
2911 $$ = build_keyword_decl (NULL_TREE, $3, $5);
2912 }
2913
2914 | ':' identifier
2915 {
2916 $$ = build_keyword_decl (NULL_TREE, NULL_TREE, $2);
2917 }
2918 ;
2919
2920 messageargs:
2921 selector
2922 | keywordarglist
2923 ;
2924
2925 keywordarglist:
2926 keywordarg
2927 | keywordarglist keywordarg
2928 {
2929 $$ = chainon ($1, $2);
2930 }
2931 ;
2932
2933
2934 keywordexpr:
2935 nonnull_exprlist
2936 {
2937 if (TREE_CHAIN ($1) == NULL_TREE)
2938 /* just return the expr., remove a level of indirection */
2939 $$ = TREE_VALUE ($1);
2940 else
2941 /* we have a comma expr., we will collapse later */
2942 $$ = $1;
2943 }
2944 ;
2945
2946 keywordarg:
2947 selector ':' keywordexpr
2948 {
2949 $$ = build_tree_list ($1, $3);
2950 }
2951 | ':' keywordexpr
2952 {
2953 $$ = build_tree_list (NULL_TREE, $2);
2954 }
2955 ;
2956
2957 receiver:
2958 expr
2959 | CLASSNAME
2960 {
2961 $$ = get_class_reference ($1);
2962 }
2963 ;
2964
2965 objcmessageexpr:
2966 '['
2967 { objc_receiver_context = 1; }
2968 receiver
2969 { objc_receiver_context = 0; }
2970 messageargs ']'
2971 {
2972 $$ = build_tree_list ($3, $5);
2973 }
2974 ;
2975
2976 selectorarg:
2977 selector
2978 | keywordnamelist
2979 ;
2980
2981 keywordnamelist:
2982 keywordname
2983 | keywordnamelist keywordname
2984 {
2985 $$ = chainon ($1, $2);
2986 }
2987 ;
2988
2989 keywordname:
2990 selector ':'
2991 {
2992 $$ = build_tree_list ($1, NULL_TREE);
2993 }
2994 | ':'
2995 {
2996 $$ = build_tree_list (NULL_TREE, NULL_TREE);
2997 }
2998 ;
2999
3000 objcselectorexpr:
3001 SELECTOR '(' selectorarg ')'
3002 {
3003 $$ = $3;
3004 }
3005 ;
3006
3007 objcprotocolexpr:
3008 PROTOCOL '(' identifier ')'
3009 {
3010 $$ = $3;
3011 }
3012 ;
3013
3014 /* extension to support C-structures in the archiver */
3015
3016 objcencodeexpr:
3017 ENCODE '(' typename ')'
3018 {
3019 $$ = groktypename ($3);
3020 }
3021 ;
3022
3023 end ifobjc
3024 %%