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c-parse.in: Recognize protocol qualifiers in class definitions for objc.
[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 #include "output.h"
73
74 #ifdef MULTIBYTE_CHARS
75 #include <stdlib.h>
76 #include <locale.h>
77 #endif
78
79 ifobjc
80 #include "objc-act.h"
81 end ifobjc
82
83 /* Since parsers are distinct for each language, put the language string
84 definition here. */
85 ifobjc
86 char *language_string = "GNU Obj-C";
87 end ifobjc
88 ifc
89 char *language_string = "GNU C";
90 end ifc
91
92 #ifndef errno
93 extern int errno;
94 #endif
95
96 /* Like YYERROR but do call yyerror. */
97 #define YYERROR1 { yyerror ("syntax error"); YYERROR; }
98
99 /* Cause the `yydebug' variable to be defined. */
100 #define YYDEBUG 1
101 %}
102
103 %start program
104
105 %union {long itype; tree ttype; enum tree_code code;
106 char *filename; int lineno; int ends_in_label; }
107
108 /* All identifiers that are not reserved words
109 and are not declared typedefs in the current block */
110 %token IDENTIFIER
111
112 /* All identifiers that are declared typedefs in the current block.
113 In some contexts, they are treated just like IDENTIFIER,
114 but they can also serve as typespecs in declarations. */
115 %token TYPENAME
116
117 /* Reserved words that specify storage class.
118 yylval contains an IDENTIFIER_NODE which indicates which one. */
119 %token SCSPEC
120
121 /* Reserved words that specify type.
122 yylval contains an IDENTIFIER_NODE which indicates which one. */
123 %token TYPESPEC
124
125 /* Reserved words that qualify type: "const" or "volatile".
126 yylval contains an IDENTIFIER_NODE which indicates which one. */
127 %token TYPE_QUAL
128
129 /* Character or numeric constants.
130 yylval is the node for the constant. */
131 %token CONSTANT
132
133 /* String constants in raw form.
134 yylval is a STRING_CST node. */
135 %token STRING
136
137 /* "...", used for functions with variable arglists. */
138 %token ELLIPSIS
139
140 /* the reserved words */
141 /* SCO include files test "ASM", so use something else. */
142 %token SIZEOF ENUM STRUCT UNION IF ELSE WHILE DO FOR SWITCH CASE DEFAULT
143 %token BREAK CONTINUE RETURN GOTO ASM_KEYWORD TYPEOF ALIGNOF
144 %token ATTRIBUTE EXTENSION LABEL
145 %token REALPART IMAGPART
146
147 /* Add precedence rules to solve dangling else s/r conflict */
148 %nonassoc IF
149 %nonassoc ELSE
150
151 /* Define the operator tokens and their precedences.
152 The value is an integer because, if used, it is the tree code
153 to use in the expression made from the operator. */
154
155 %right <code> ASSIGN '='
156 %right <code> '?' ':'
157 %left <code> OROR
158 %left <code> ANDAND
159 %left <code> '|'
160 %left <code> '^'
161 %left <code> '&'
162 %left <code> EQCOMPARE
163 %left <code> ARITHCOMPARE
164 %left <code> LSHIFT RSHIFT
165 %left <code> '+' '-'
166 %left <code> '*' '/' '%'
167 %right <code> UNARY PLUSPLUS MINUSMINUS
168 %left HYPERUNARY
169 %left <code> POINTSAT '.' '(' '['
170
171 /* The Objective-C keywords. These are included in C and in
172 Objective C, so that the token codes are the same in both. */
173 %token INTERFACE IMPLEMENTATION END SELECTOR DEFS ENCODE
174 %token CLASSNAME PUBLIC PRIVATE PROTECTED PROTOCOL OBJECTNAME CLASS ALIAS
175
176 /* Objective-C string constants in raw form.
177 yylval is an OBJC_STRING_CST node. */
178 %token OBJC_STRING
179
180
181 %type <code> unop
182
183 %type <ttype> identifier IDENTIFIER TYPENAME CONSTANT expr nonnull_exprlist exprlist
184 %type <ttype> expr_no_commas cast_expr unary_expr primary string STRING
185 %type <ttype> typed_declspecs reserved_declspecs
186 %type <ttype> typed_typespecs reserved_typespecquals
187 %type <ttype> declmods typespec typespecqual_reserved
188 %type <ttype> typed_declspecs_no_prefix_attr reserved_declspecs_no_prefix_attr
189 %type <ttype> declmods_no_prefix_attr
190 %type <ttype> SCSPEC TYPESPEC TYPE_QUAL nonempty_type_quals maybe_type_qual
191 %type <ttype> initdecls notype_initdecls initdcl notype_initdcl
192 %type <ttype> init maybeasm
193 %type <ttype> asm_operands nonnull_asm_operands asm_operand asm_clobbers
194 %type <ttype> maybe_attribute attributes attribute attribute_list attrib
195 %type <ttype> any_word
196
197 %type <ttype> compstmt
198
199 %type <ttype> declarator
200 %type <ttype> notype_declarator after_type_declarator
201 %type <ttype> parm_declarator
202
203 %type <ttype> structsp component_decl_list component_decl_list2
204 %type <ttype> component_decl components component_declarator
205 %type <ttype> enumlist enumerator
206 %type <ttype> typename absdcl absdcl1 type_quals
207 %type <ttype> xexpr parms parm identifiers
208
209 %type <ttype> parmlist parmlist_1 parmlist_2
210 %type <ttype> parmlist_or_identifiers parmlist_or_identifiers_1
211 %type <ttype> identifiers_or_typenames
212
213 %type <itype> setspecs
214
215 %type <ends_in_label> lineno_stmt_or_label lineno_stmt_or_labels stmt_or_label
216
217 %type <filename> save_filename
218 %type <lineno> save_lineno
219 \f
220 ifobjc
221 /* the Objective-C nonterminals */
222
223 %type <ttype> ivar_decl_list ivar_decls ivar_decl ivars ivar_declarator
224 %type <ttype> methoddecl unaryselector keywordselector selector
225 %type <ttype> keyworddecl receiver objcmessageexpr messageargs
226 %type <ttype> keywordexpr keywordarglist keywordarg
227 %type <ttype> myparms myparm optparmlist reservedwords objcselectorexpr
228 %type <ttype> selectorarg keywordnamelist keywordname objcencodeexpr
229 %type <ttype> objc_string non_empty_protocolrefs protocolrefs identifier_list objcprotocolexpr
230
231 %type <ttype> CLASSNAME OBJC_STRING OBJECTNAME
232 end ifobjc
233 \f
234 %{
235 /* Number of statements (loosely speaking) and compound statements
236 seen so far. */
237 static int stmt_count;
238 static int compstmt_count;
239
240 /* Input file and line number of the end of the body of last simple_if;
241 used by the stmt-rule immediately after simple_if returns. */
242 static char *if_stmt_file;
243 static int if_stmt_line;
244
245 /* List of types and structure classes of the current declaration. */
246 static tree current_declspecs = NULL_TREE;
247 static tree prefix_attributes = NULL_TREE;
248
249 /* Stack of saved values of current_declspecs and prefix_attributes. */
250 static tree declspec_stack;
251
252 /* 1 if we explained undeclared var errors. */
253 static int undeclared_variable_notice;
254
255 ifobjc
256 /* Objective-C specific information */
257
258 tree objc_interface_context;
259 tree objc_implementation_context;
260 tree objc_method_context;
261 tree objc_ivar_chain;
262 tree objc_ivar_context;
263 enum tree_code objc_inherit_code;
264 int objc_receiver_context;
265 int objc_public_flag;
266
267 end ifobjc
268
269 /* Tell yyparse how to print a token's value, if yydebug is set. */
270
271 #define YYPRINT(FILE,YYCHAR,YYLVAL) yyprint(FILE,YYCHAR,YYLVAL)
272 extern void yyprint PROTO ((FILE *, int, YYSTYPE));
273 %}
274 \f
275 %%
276 program: /* empty */
277 { if (pedantic)
278 pedwarn ("ANSI C forbids an empty source file");
279 finish_file ();
280 }
281 | extdefs
282 {
283 /* In case there were missing closebraces,
284 get us back to the global binding level. */
285 while (! global_bindings_p ())
286 poplevel (0, 0, 0);
287 finish_file ();
288 }
289 ;
290
291 /* the reason for the strange actions in this rule
292 is so that notype_initdecls when reached via datadef
293 can find a valid list of type and sc specs in $0. */
294
295 extdefs:
296 {$<ttype>$ = NULL_TREE; } extdef
297 | extdefs {$<ttype>$ = NULL_TREE; } extdef
298 ;
299
300 extdef:
301 fndef
302 | datadef
303 ifobjc
304 | objcdef
305 end ifobjc
306 | ASM_KEYWORD '(' expr ')' ';'
307 { STRIP_NOPS ($3);
308 if ((TREE_CODE ($3) == ADDR_EXPR
309 && TREE_CODE (TREE_OPERAND ($3, 0)) == STRING_CST)
310 || TREE_CODE ($3) == STRING_CST)
311 assemble_asm ($3);
312 else
313 error ("argument of `asm' is not a constant string"); }
314 | extension extdef
315 { pedantic = $<itype>1; }
316 ;
317
318 datadef:
319 setspecs notype_initdecls ';'
320 { if (pedantic)
321 error ("ANSI C forbids data definition with no type or storage class");
322 else if (!flag_traditional)
323 warning ("data definition has no type or storage class");
324
325 current_declspecs = TREE_VALUE (declspec_stack);
326 prefix_attributes = TREE_PURPOSE (declspec_stack);
327 declspec_stack = TREE_CHAIN (declspec_stack);
328 resume_momentary ($1); }
329 | declmods setspecs notype_initdecls ';'
330 { current_declspecs = TREE_VALUE (declspec_stack);
331 prefix_attributes = TREE_PURPOSE (declspec_stack);
332 declspec_stack = TREE_CHAIN (declspec_stack);
333 resume_momentary ($2); }
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 resume_momentary ($2); }
339 | declmods ';'
340 { pedwarn ("empty declaration"); }
341 | typed_declspecs ';'
342 { shadow_tag ($1); }
343 | error ';'
344 | error '}'
345 | ';'
346 { if (pedantic)
347 pedwarn ("ANSI C does not allow extra `;' outside of a function"); }
348 ;
349 \f
350 fndef:
351 typed_declspecs setspecs declarator
352 { if (! start_function (current_declspecs, $3,
353 prefix_attributes, NULL_TREE, 0))
354 YYERROR1;
355 reinit_parse_for_function (); }
356 old_style_parm_decls
357 { store_parm_decls (); }
358 compstmt_or_error
359 { finish_function (0);
360 current_declspecs = TREE_VALUE (declspec_stack);
361 prefix_attributes = TREE_PURPOSE (declspec_stack);
362 declspec_stack = TREE_CHAIN (declspec_stack);
363 resume_momentary ($2); }
364 | typed_declspecs setspecs declarator error
365 { current_declspecs = TREE_VALUE (declspec_stack);
366 prefix_attributes = TREE_PURPOSE (declspec_stack);
367 declspec_stack = TREE_CHAIN (declspec_stack);
368 resume_momentary ($2); }
369 | declmods setspecs notype_declarator
370 { if (! start_function (current_declspecs, $3,
371 prefix_attributes, NULL_TREE, 0))
372 YYERROR1;
373 reinit_parse_for_function (); }
374 old_style_parm_decls
375 { store_parm_decls (); }
376 compstmt_or_error
377 { finish_function (0);
378 current_declspecs = TREE_VALUE (declspec_stack);
379 prefix_attributes = TREE_PURPOSE (declspec_stack);
380 declspec_stack = TREE_CHAIN (declspec_stack);
381 resume_momentary ($2); }
382 | declmods setspecs notype_declarator error
383 { current_declspecs = TREE_VALUE (declspec_stack);
384 prefix_attributes = TREE_PURPOSE (declspec_stack);
385 declspec_stack = TREE_CHAIN (declspec_stack);
386 resume_momentary ($2); }
387 | setspecs notype_declarator
388 { if (! start_function (NULL_TREE, $2,
389 prefix_attributes, NULL_TREE, 0))
390 YYERROR1;
391 reinit_parse_for_function (); }
392 old_style_parm_decls
393 { store_parm_decls (); }
394 compstmt_or_error
395 { finish_function (0);
396 current_declspecs = TREE_VALUE (declspec_stack);
397 prefix_attributes = TREE_PURPOSE (declspec_stack);
398 declspec_stack = TREE_CHAIN (declspec_stack);
399 resume_momentary ($1); }
400 | setspecs notype_declarator error
401 { current_declspecs = TREE_VALUE (declspec_stack);
402 prefix_attributes = TREE_PURPOSE (declspec_stack);
403 declspec_stack = TREE_CHAIN (declspec_stack);
404 resume_momentary ($1); }
405 ;
406
407 identifier:
408 IDENTIFIER
409 | TYPENAME
410 ifobjc
411 | OBJECTNAME
412 | CLASSNAME
413 end ifobjc
414 ;
415
416 unop: '&'
417 { $$ = ADDR_EXPR; }
418 | '-'
419 { $$ = NEGATE_EXPR; }
420 | '+'
421 { $$ = CONVERT_EXPR; }
422 | PLUSPLUS
423 { $$ = PREINCREMENT_EXPR; }
424 | MINUSMINUS
425 { $$ = PREDECREMENT_EXPR; }
426 | '~'
427 { $$ = BIT_NOT_EXPR; }
428 | '!'
429 { $$ = TRUTH_NOT_EXPR; }
430 ;
431
432 expr: nonnull_exprlist
433 { $$ = build_compound_expr ($1); }
434 ;
435
436 exprlist:
437 /* empty */
438 { $$ = NULL_TREE; }
439 | nonnull_exprlist
440 ;
441
442 nonnull_exprlist:
443 expr_no_commas
444 { $$ = build_tree_list (NULL_TREE, $1); }
445 | nonnull_exprlist ',' expr_no_commas
446 { chainon ($1, build_tree_list (NULL_TREE, $3)); }
447 ;
448
449 unary_expr:
450 primary
451 | '*' cast_expr %prec UNARY
452 { $$ = build_indirect_ref ($2, "unary *"); }
453 /* __extension__ turns off -pedantic for following primary. */
454 | extension cast_expr %prec UNARY
455 { $$ = $2;
456 pedantic = $<itype>1; }
457 | unop cast_expr %prec UNARY
458 { $$ = build_unary_op ($1, $2, 0);
459 overflow_warning ($$); }
460 /* Refer to the address of a label as a pointer. */
461 | ANDAND identifier
462 { tree label = lookup_label ($2);
463 if (pedantic)
464 pedwarn ("ANSI C forbids `&&'");
465 if (label == 0)
466 $$ = null_pointer_node;
467 else
468 {
469 TREE_USED (label) = 1;
470 $$ = build1 (ADDR_EXPR, ptr_type_node, label);
471 TREE_CONSTANT ($$) = 1;
472 }
473 }
474 /* This seems to be impossible on some machines, so let's turn it off.
475 You can use __builtin_next_arg to find the anonymous stack args.
476 | '&' ELLIPSIS
477 { tree types = TYPE_ARG_TYPES (TREE_TYPE (current_function_decl));
478 $$ = error_mark_node;
479 if (TREE_VALUE (tree_last (types)) == void_type_node)
480 error ("`&...' used in function with fixed number of arguments");
481 else
482 {
483 if (pedantic)
484 pedwarn ("ANSI C forbids `&...'");
485 $$ = tree_last (DECL_ARGUMENTS (current_function_decl));
486 $$ = build_unary_op (ADDR_EXPR, $$, 0);
487 } }
488 */
489 | sizeof unary_expr %prec UNARY
490 { skip_evaluation--;
491 if (TREE_CODE ($2) == COMPONENT_REF
492 && DECL_C_BIT_FIELD (TREE_OPERAND ($2, 1)))
493 error ("`sizeof' applied to a bit-field");
494 $$ = c_sizeof (TREE_TYPE ($2)); }
495 | sizeof '(' typename ')' %prec HYPERUNARY
496 { skip_evaluation--;
497 $$ = c_sizeof (groktypename ($3)); }
498 | alignof unary_expr %prec UNARY
499 { skip_evaluation--;
500 $$ = c_alignof_expr ($2); }
501 | alignof '(' typename ')' %prec HYPERUNARY
502 { skip_evaluation--;
503 $$ = c_alignof (groktypename ($3)); }
504 | REALPART cast_expr %prec UNARY
505 { $$ = build_unary_op (REALPART_EXPR, $2, 0); }
506 | IMAGPART cast_expr %prec UNARY
507 { $$ = build_unary_op (IMAGPART_EXPR, $2, 0); }
508 ;
509
510 sizeof:
511 SIZEOF { skip_evaluation++; }
512 ;
513
514 alignof:
515 ALIGNOF { skip_evaluation++; }
516 ;
517
518 cast_expr:
519 unary_expr
520 | '(' typename ')' cast_expr %prec UNARY
521 { tree type = groktypename ($2);
522 $$ = build_c_cast (type, $4); }
523 | '(' typename ')' '{'
524 { start_init (NULL_TREE, NULL, 0);
525 $2 = groktypename ($2);
526 really_start_incremental_init ($2); }
527 initlist_maybe_comma '}' %prec UNARY
528 { char *name;
529 tree result = pop_init_level (0);
530 tree type = $2;
531 finish_init ();
532
533 if (pedantic)
534 pedwarn ("ANSI C forbids constructor expressions");
535 if (TYPE_NAME (type) != 0)
536 {
537 if (TREE_CODE (TYPE_NAME (type)) == IDENTIFIER_NODE)
538 name = IDENTIFIER_POINTER (TYPE_NAME (type));
539 else
540 name = IDENTIFIER_POINTER (DECL_NAME (TYPE_NAME (type)));
541 }
542 else
543 name = "";
544 $$ = result;
545 if (TREE_CODE (type) == ARRAY_TYPE && TYPE_SIZE (type) == 0)
546 {
547 int failure = complete_array_type (type, $$, 1);
548 if (failure)
549 abort ();
550 }
551 }
552 ;
553
554 expr_no_commas:
555 cast_expr
556 | expr_no_commas '+' expr_no_commas
557 { $$ = parser_build_binary_op ($2, $1, $3); }
558 | expr_no_commas '-' expr_no_commas
559 { $$ = parser_build_binary_op ($2, $1, $3); }
560 | expr_no_commas '*' expr_no_commas
561 { $$ = parser_build_binary_op ($2, $1, $3); }
562 | expr_no_commas '/' expr_no_commas
563 { $$ = parser_build_binary_op ($2, $1, $3); }
564 | expr_no_commas '%' expr_no_commas
565 { $$ = parser_build_binary_op ($2, $1, $3); }
566 | expr_no_commas LSHIFT expr_no_commas
567 { $$ = parser_build_binary_op ($2, $1, $3); }
568 | expr_no_commas RSHIFT expr_no_commas
569 { $$ = parser_build_binary_op ($2, $1, $3); }
570 | expr_no_commas ARITHCOMPARE expr_no_commas
571 { $$ = parser_build_binary_op ($2, $1, $3); }
572 | expr_no_commas EQCOMPARE expr_no_commas
573 { $$ = parser_build_binary_op ($2, $1, $3); }
574 | expr_no_commas '&' expr_no_commas
575 { $$ = parser_build_binary_op ($2, $1, $3); }
576 | expr_no_commas '|' expr_no_commas
577 { $$ = parser_build_binary_op ($2, $1, $3); }
578 | expr_no_commas '^' expr_no_commas
579 { $$ = parser_build_binary_op ($2, $1, $3); }
580 | expr_no_commas ANDAND
581 { $1 = truthvalue_conversion (default_conversion ($1));
582 skip_evaluation += $1 == boolean_false_node; }
583 expr_no_commas
584 { skip_evaluation -= $1 == boolean_false_node;
585 $$ = parser_build_binary_op (TRUTH_ANDIF_EXPR, $1, $4); }
586 | expr_no_commas OROR
587 { $1 = truthvalue_conversion (default_conversion ($1));
588 skip_evaluation += $1 == boolean_true_node; }
589 expr_no_commas
590 { skip_evaluation -= $1 == boolean_true_node;
591 $$ = parser_build_binary_op (TRUTH_ORIF_EXPR, $1, $4); }
592 | expr_no_commas '?'
593 { $1 = truthvalue_conversion (default_conversion ($1));
594 skip_evaluation += $1 == boolean_false_node; }
595 expr ':'
596 { skip_evaluation += (($1 == boolean_true_node)
597 - ($1 == boolean_false_node)); }
598 expr_no_commas
599 { skip_evaluation -= $1 == boolean_true_node;
600 $$ = build_conditional_expr ($1, $4, $7); }
601 | expr_no_commas '?'
602 { if (pedantic)
603 pedwarn ("ANSI C forbids omitting the middle term of a ?: expression");
604 /* Make sure first operand is calculated only once. */
605 $<ttype>2 = save_expr ($1);
606 $1 = truthvalue_conversion (default_conversion ($<ttype>2));
607 skip_evaluation += $1 == boolean_true_node; }
608 ':' expr_no_commas
609 { skip_evaluation -= $1 == boolean_true_node;
610 $$ = build_conditional_expr ($1, $<ttype>2, $5); }
611 | expr_no_commas '=' expr_no_commas
612 { $$ = build_modify_expr ($1, NOP_EXPR, $3);
613 C_SET_EXP_ORIGINAL_CODE ($$, MODIFY_EXPR); }
614 | expr_no_commas ASSIGN expr_no_commas
615 { $$ = build_modify_expr ($1, $2, $3);
616 /* This inhibits warnings in truthvalue_conversion. */
617 C_SET_EXP_ORIGINAL_CODE ($$, ERROR_MARK); }
618 ;
619
620 primary:
621 IDENTIFIER
622 {
623 $$ = lastiddecl;
624 if (!$$ || $$ == error_mark_node)
625 {
626 if (yychar == YYEMPTY)
627 yychar = YYLEX;
628 if (yychar == '(')
629 {
630 ifobjc
631 tree decl;
632
633 if (objc_receiver_context
634 && ! (objc_receiver_context
635 && strcmp (IDENTIFIER_POINTER ($1), "super")))
636 /* we have a message to super */
637 $$ = get_super_receiver ();
638 else if (objc_method_context
639 && (decl = is_ivar (objc_ivar_chain, $1)))
640 {
641 if (is_private (decl))
642 $$ = error_mark_node;
643 else
644 $$ = build_ivar_reference ($1);
645 }
646 else
647 end ifobjc
648 {
649 /* Ordinary implicit function declaration. */
650 $$ = implicitly_declare ($1);
651 assemble_external ($$);
652 TREE_USED ($$) = 1;
653 }
654 }
655 else if (current_function_decl == 0)
656 {
657 error ("`%s' undeclared here (not in a function)",
658 IDENTIFIER_POINTER ($1));
659 $$ = error_mark_node;
660 }
661 else
662 {
663 ifobjc
664 tree decl;
665
666 if (objc_receiver_context
667 && ! strcmp (IDENTIFIER_POINTER ($1), "super"))
668 /* we have a message to super */
669 $$ = get_super_receiver ();
670 else if (objc_method_context
671 && (decl = is_ivar (objc_ivar_chain, $1)))
672 {
673 if (is_private (decl))
674 $$ = error_mark_node;
675 else
676 $$ = build_ivar_reference ($1);
677 }
678 else
679 end ifobjc
680 {
681 if (IDENTIFIER_GLOBAL_VALUE ($1) != error_mark_node
682 || IDENTIFIER_ERROR_LOCUS ($1) != current_function_decl)
683 {
684 error ("`%s' undeclared (first use in this function)",
685 IDENTIFIER_POINTER ($1));
686
687 if (! undeclared_variable_notice)
688 {
689 error ("(Each undeclared identifier is reported only once");
690 error ("for each function it appears in.)");
691 undeclared_variable_notice = 1;
692 }
693 }
694 $$ = error_mark_node;
695 /* Prevent repeated error messages. */
696 IDENTIFIER_GLOBAL_VALUE ($1) = error_mark_node;
697 IDENTIFIER_ERROR_LOCUS ($1) = current_function_decl;
698 }
699 }
700 }
701 else if (TREE_TYPE ($$) == error_mark_node)
702 $$ = error_mark_node;
703 else if (C_DECL_ANTICIPATED ($$))
704 {
705 /* The first time we see a build-in function used,
706 if it has not been declared. */
707 C_DECL_ANTICIPATED ($$) = 0;
708 if (yychar == YYEMPTY)
709 yychar = YYLEX;
710 if (yychar == '(')
711 {
712 /* Omit the implicit declaration we
713 would ordinarily do, so we don't lose
714 the actual built in type.
715 But print a diagnostic for the mismatch. */
716 ifobjc
717 if (objc_method_context
718 && is_ivar (objc_ivar_chain, $1))
719 error ("Instance variable `%s' implicitly declared as function",
720 IDENTIFIER_POINTER (DECL_NAME ($$)));
721 else
722 end ifobjc
723 if (TREE_CODE ($$) != FUNCTION_DECL)
724 error ("`%s' implicitly declared as function",
725 IDENTIFIER_POINTER (DECL_NAME ($$)));
726 else if ((TYPE_MODE (TREE_TYPE (TREE_TYPE ($$)))
727 != TYPE_MODE (integer_type_node))
728 && (TREE_TYPE (TREE_TYPE ($$))
729 != void_type_node))
730 pedwarn ("type mismatch in implicit declaration for built-in function `%s'",
731 IDENTIFIER_POINTER (DECL_NAME ($$)));
732 /* If it really returns void, change that to int. */
733 if (TREE_TYPE (TREE_TYPE ($$)) == void_type_node)
734 TREE_TYPE ($$)
735 = build_function_type (integer_type_node,
736 TYPE_ARG_TYPES (TREE_TYPE ($$)));
737 }
738 else
739 pedwarn ("built-in function `%s' used without declaration",
740 IDENTIFIER_POINTER (DECL_NAME ($$)));
741
742 /* Do what we would ordinarily do when a fn is used. */
743 assemble_external ($$);
744 TREE_USED ($$) = 1;
745 }
746 else
747 {
748 assemble_external ($$);
749 TREE_USED ($$) = 1;
750 ifobjc
751 /* we have a definition - still check if iVariable */
752
753 if (!objc_receiver_context
754 || (objc_receiver_context
755 && strcmp (IDENTIFIER_POINTER ($1), "super")))
756 {
757 tree decl;
758
759 if (objc_method_context
760 && (decl = is_ivar (objc_ivar_chain, $1)))
761 {
762 if (IDENTIFIER_LOCAL_VALUE ($1))
763 warning ("local declaration of `%s' hides instance variable",
764 IDENTIFIER_POINTER ($1));
765 else
766 {
767 if (is_private (decl))
768 $$ = error_mark_node;
769 else
770 $$ = build_ivar_reference ($1);
771 }
772 }
773 }
774 else /* we have a message to super */
775 $$ = get_super_receiver ();
776 end ifobjc
777 }
778
779 if (TREE_CODE ($$) == CONST_DECL)
780 {
781 $$ = DECL_INITIAL ($$);
782 /* This is to prevent an enum whose value is 0
783 from being considered a null pointer constant. */
784 $$ = build1 (NOP_EXPR, TREE_TYPE ($$), $$);
785 TREE_CONSTANT ($$) = 1;
786 }
787 }
788 | CONSTANT
789 | string
790 { $$ = combine_strings ($1); }
791 | '(' expr ')'
792 { char class = TREE_CODE_CLASS (TREE_CODE ($2));
793 if (class == 'e' || class == '1'
794 || class == '2' || class == '<')
795 C_SET_EXP_ORIGINAL_CODE ($2, ERROR_MARK);
796 $$ = $2; }
797 | '(' error ')'
798 { $$ = error_mark_node; }
799 | '('
800 { if (current_function_decl == 0)
801 {
802 error ("braced-group within expression allowed only inside a function");
803 YYERROR;
804 }
805 /* We must force a BLOCK for this level
806 so that, if it is not expanded later,
807 there is a way to turn off the entire subtree of blocks
808 that are contained in it. */
809 keep_next_level ();
810 push_iterator_stack ();
811 push_label_level ();
812 $<ttype>$ = expand_start_stmt_expr (); }
813 compstmt ')'
814 { tree rtl_exp;
815 if (pedantic)
816 pedwarn ("ANSI C forbids braced-groups within expressions");
817 pop_iterator_stack ();
818 pop_label_level ();
819 rtl_exp = expand_end_stmt_expr ($<ttype>2);
820 /* The statements have side effects, so the group does. */
821 TREE_SIDE_EFFECTS (rtl_exp) = 1;
822
823 if (TREE_CODE ($3) == BLOCK)
824 {
825 /* Make a BIND_EXPR for the BLOCK already made. */
826 $$ = build (BIND_EXPR, TREE_TYPE (rtl_exp),
827 NULL_TREE, rtl_exp, $3);
828 /* Remove the block from the tree at this point.
829 It gets put back at the proper place
830 when the BIND_EXPR is expanded. */
831 delete_block ($3);
832 }
833 else
834 $$ = $3;
835 }
836 | primary '(' exprlist ')' %prec '.'
837 { $$ = build_function_call ($1, $3); }
838 | primary '[' expr ']' %prec '.'
839 { $$ = build_array_ref ($1, $3); }
840 | primary '.' identifier
841 {
842 ifobjc
843 if (doing_objc_thang)
844 {
845 if (is_public ($1, $3))
846 $$ = build_component_ref ($1, $3);
847 else
848 $$ = error_mark_node;
849 }
850 else
851 end ifobjc
852 $$ = build_component_ref ($1, $3);
853 }
854 | primary POINTSAT identifier
855 {
856 tree expr = build_indirect_ref ($1, "->");
857
858 ifobjc
859 if (doing_objc_thang)
860 {
861 if (is_public (expr, $3))
862 $$ = build_component_ref (expr, $3);
863 else
864 $$ = error_mark_node;
865 }
866 else
867 end ifobjc
868 $$ = build_component_ref (expr, $3);
869 }
870 | primary PLUSPLUS
871 { $$ = build_unary_op (POSTINCREMENT_EXPR, $1, 0); }
872 | primary MINUSMINUS
873 { $$ = build_unary_op (POSTDECREMENT_EXPR, $1, 0); }
874 ifobjc
875 | objcmessageexpr
876 { $$ = build_message_expr ($1); }
877 | objcselectorexpr
878 { $$ = build_selector_expr ($1); }
879 | objcprotocolexpr
880 { $$ = build_protocol_expr ($1); }
881 | objcencodeexpr
882 { $$ = build_encode_expr ($1); }
883 | objc_string
884 { $$ = build_objc_string_object ($1); }
885 end ifobjc
886 ;
887
888 /* Produces a STRING_CST with perhaps more STRING_CSTs chained onto it. */
889 string:
890 STRING
891 | string STRING
892 { $$ = chainon ($1, $2); }
893 ;
894
895 ifobjc
896 /* Produces an OBJC_STRING_CST with perhaps more OBJC_STRING_CSTs chained
897 onto it. */
898 objc_string:
899 OBJC_STRING
900 | objc_string OBJC_STRING
901 { $$ = chainon ($1, $2); }
902 ;
903 end ifobjc
904
905 old_style_parm_decls:
906 /* empty */
907 | datadecls
908 | datadecls ELLIPSIS
909 /* ... is used here to indicate a varargs function. */
910 { c_mark_varargs ();
911 if (pedantic)
912 pedwarn ("ANSI C does not permit use of `varargs.h'"); }
913 ;
914
915 /* The following are analogous to lineno_decl, decls and decl
916 except that they do not allow nested functions.
917 They are used for old-style parm decls. */
918 lineno_datadecl:
919 save_filename save_lineno datadecl
920 { }
921 ;
922
923 datadecls:
924 lineno_datadecl
925 | errstmt
926 | datadecls lineno_datadecl
927 | lineno_datadecl errstmt
928 ;
929
930 /* We don't allow prefix attributes here because they cause reduce/reduce
931 conflicts: we can't know whether we're parsing a function decl with
932 attribute suffix, or function defn with attribute prefix on first old
933 style parm. */
934 datadecl:
935 typed_declspecs_no_prefix_attr setspecs initdecls ';'
936 { current_declspecs = TREE_VALUE (declspec_stack);
937 prefix_attributes = TREE_PURPOSE (declspec_stack);
938 declspec_stack = TREE_CHAIN (declspec_stack);
939 resume_momentary ($2); }
940 | declmods_no_prefix_attr setspecs notype_initdecls ';'
941 { current_declspecs = TREE_VALUE (declspec_stack);
942 prefix_attributes = TREE_PURPOSE (declspec_stack);
943 declspec_stack = TREE_CHAIN (declspec_stack);
944 resume_momentary ($2); }
945 | typed_declspecs_no_prefix_attr ';'
946 { shadow_tag_warned ($1, 1);
947 pedwarn ("empty declaration"); }
948 | declmods_no_prefix_attr ';'
949 { pedwarn ("empty declaration"); }
950 ;
951
952 /* This combination which saves a lineno before a decl
953 is the normal thing to use, rather than decl itself.
954 This is to avoid shift/reduce conflicts in contexts
955 where statement labels are allowed. */
956 lineno_decl:
957 save_filename save_lineno decl
958 { }
959 ;
960
961 decls:
962 lineno_decl
963 | errstmt
964 | decls lineno_decl
965 | lineno_decl errstmt
966 ;
967
968 /* records the type and storage class specs to use for processing
969 the declarators that follow.
970 Maintains a stack of outer-level values of current_declspecs,
971 for the sake of parm declarations nested in function declarators. */
972 setspecs: /* empty */
973 { $$ = suspend_momentary ();
974 pending_xref_error ();
975 declspec_stack = tree_cons (prefix_attributes,
976 current_declspecs,
977 declspec_stack);
978 split_specs_attrs ($<ttype>0,
979 &current_declspecs, &prefix_attributes); }
980 ;
981
982 /* ??? Yuck. See after_type_declarator. */
983 setattrs: /* empty */
984 { prefix_attributes = chainon (prefix_attributes, $<ttype>0); }
985 ;
986
987 decl:
988 typed_declspecs setspecs initdecls ';'
989 { current_declspecs = TREE_VALUE (declspec_stack);
990 prefix_attributes = TREE_PURPOSE (declspec_stack);
991 declspec_stack = TREE_CHAIN (declspec_stack);
992 resume_momentary ($2); }
993 | declmods setspecs notype_initdecls ';'
994 { current_declspecs = TREE_VALUE (declspec_stack);
995 prefix_attributes = TREE_PURPOSE (declspec_stack);
996 declspec_stack = TREE_CHAIN (declspec_stack);
997 resume_momentary ($2); }
998 | typed_declspecs setspecs nested_function
999 { current_declspecs = TREE_VALUE (declspec_stack);
1000 prefix_attributes = TREE_PURPOSE (declspec_stack);
1001 declspec_stack = TREE_CHAIN (declspec_stack);
1002 resume_momentary ($2); }
1003 | declmods setspecs notype_nested_function
1004 { current_declspecs = TREE_VALUE (declspec_stack);
1005 prefix_attributes = TREE_PURPOSE (declspec_stack);
1006 declspec_stack = TREE_CHAIN (declspec_stack);
1007 resume_momentary ($2); }
1008 | typed_declspecs ';'
1009 { shadow_tag ($1); }
1010 | declmods ';'
1011 { pedwarn ("empty declaration"); }
1012 | extension decl
1013 { pedantic = $<itype>1; }
1014 ;
1015
1016 /* Declspecs which contain at least one type specifier or typedef name.
1017 (Just `const' or `volatile' is not enough.)
1018 A typedef'd name following these is taken as a name to be declared.
1019 Declspecs have a non-NULL TREE_VALUE, attributes do not. */
1020
1021 typed_declspecs:
1022 typespec reserved_declspecs
1023 { $$ = tree_cons (NULL_TREE, $1, $2); }
1024 | declmods typespec reserved_declspecs
1025 { $$ = chainon ($3, tree_cons (NULL_TREE, $2, $1)); }
1026 ;
1027
1028 reserved_declspecs: /* empty */
1029 { $$ = NULL_TREE; }
1030 | reserved_declspecs typespecqual_reserved
1031 { $$ = tree_cons (NULL_TREE, $2, $1); }
1032 | reserved_declspecs SCSPEC
1033 { if (extra_warnings)
1034 warning ("`%s' is not at beginning of declaration",
1035 IDENTIFIER_POINTER ($2));
1036 $$ = tree_cons (NULL_TREE, $2, $1); }
1037 | reserved_declspecs attributes
1038 { $$ = tree_cons ($2, NULL_TREE, $1); }
1039 ;
1040
1041 typed_declspecs_no_prefix_attr:
1042 typespec reserved_declspecs_no_prefix_attr
1043 { $$ = tree_cons (NULL_TREE, $1, $2); }
1044 | declmods_no_prefix_attr typespec reserved_declspecs_no_prefix_attr
1045 { $$ = chainon ($3, tree_cons (NULL_TREE, $2, $1)); }
1046 ;
1047
1048 reserved_declspecs_no_prefix_attr:
1049 /* empty */
1050 { $$ = NULL_TREE; }
1051 | reserved_declspecs_no_prefix_attr typespecqual_reserved
1052 { $$ = tree_cons (NULL_TREE, $2, $1); }
1053 | reserved_declspecs_no_prefix_attr SCSPEC
1054 { if (extra_warnings)
1055 warning ("`%s' is not at beginning of declaration",
1056 IDENTIFIER_POINTER ($2));
1057 $$ = tree_cons (NULL_TREE, $2, $1); }
1058 ;
1059
1060 /* List of just storage classes, type modifiers, and prefix attributes.
1061 A declaration can start with just this, but then it cannot be used
1062 to redeclare a typedef-name.
1063 Declspecs have a non-NULL TREE_VALUE, attributes do not. */
1064
1065 declmods:
1066 declmods_no_prefix_attr
1067 { $$ = $1; }
1068 | attributes
1069 { $$ = tree_cons ($1, NULL_TREE, NULL_TREE); }
1070 | declmods declmods_no_prefix_attr
1071 { $$ = chainon ($2, $1); }
1072 | declmods attributes
1073 { $$ = tree_cons ($2, NULL_TREE, $1); }
1074 ;
1075
1076 declmods_no_prefix_attr:
1077 TYPE_QUAL
1078 { $$ = tree_cons (NULL_TREE, $1, NULL_TREE);
1079 TREE_STATIC ($$) = 1; }
1080 | SCSPEC
1081 { $$ = tree_cons (NULL_TREE, $1, NULL_TREE); }
1082 | declmods_no_prefix_attr TYPE_QUAL
1083 { $$ = tree_cons (NULL_TREE, $2, $1);
1084 TREE_STATIC ($$) = 1; }
1085 | declmods_no_prefix_attr SCSPEC
1086 { if (extra_warnings && TREE_STATIC ($1))
1087 warning ("`%s' is not at beginning of declaration",
1088 IDENTIFIER_POINTER ($2));
1089 $$ = tree_cons (NULL_TREE, $2, $1);
1090 TREE_STATIC ($$) = TREE_STATIC ($1); }
1091 ;
1092
1093
1094 /* Used instead of declspecs where storage classes are not allowed
1095 (that is, for typenames and structure components).
1096 Don't accept a typedef-name if anything but a modifier precedes it. */
1097
1098 typed_typespecs:
1099 typespec reserved_typespecquals
1100 { $$ = tree_cons (NULL_TREE, $1, $2); }
1101 | nonempty_type_quals typespec reserved_typespecquals
1102 { $$ = chainon ($3, tree_cons (NULL_TREE, $2, $1)); }
1103 ;
1104
1105 reserved_typespecquals: /* empty */
1106 { $$ = NULL_TREE; }
1107 | reserved_typespecquals typespecqual_reserved
1108 { $$ = tree_cons (NULL_TREE, $2, $1); }
1109 ;
1110
1111 /* A typespec (but not a type qualifier).
1112 Once we have seen one of these in a declaration,
1113 if a typedef name appears then it is being redeclared. */
1114
1115 typespec: TYPESPEC
1116 | structsp
1117 | TYPENAME
1118 { /* For a typedef name, record the meaning, not the name.
1119 In case of `foo foo, bar;'. */
1120 $$ = lookup_name ($1); }
1121 ifobjc
1122 | CLASSNAME protocolrefs
1123 { $$ = get_static_reference ($1, $2); }
1124 | OBJECTNAME protocolrefs
1125 { $$ = get_object_reference ($2); }
1126
1127 /* Make "<SomeProtocol>" equivalent to "id <SomeProtocol>"
1128 - nisse@lysator.liu.se */
1129 | non_empty_protocolrefs
1130 { $$ = get_object_reference ($1); }
1131 end ifobjc
1132 | TYPEOF '(' expr ')'
1133 { $$ = TREE_TYPE ($3); }
1134 | TYPEOF '(' typename ')'
1135 { $$ = groktypename ($3); }
1136 ;
1137
1138 /* A typespec that is a reserved word, or a type qualifier. */
1139
1140 typespecqual_reserved: TYPESPEC
1141 | TYPE_QUAL
1142 | structsp
1143 ;
1144
1145 initdecls:
1146 initdcl
1147 | initdecls ',' initdcl
1148 ;
1149
1150 notype_initdecls:
1151 notype_initdcl
1152 | notype_initdecls ',' initdcl
1153 ;
1154
1155 maybeasm:
1156 /* empty */
1157 { $$ = NULL_TREE; }
1158 | ASM_KEYWORD '(' string ')'
1159 { if (TREE_CHAIN ($3)) $3 = combine_strings ($3);
1160 $$ = $3;
1161 }
1162 ;
1163
1164 initdcl:
1165 declarator maybeasm maybe_attribute '='
1166 { $<ttype>$ = start_decl ($1, current_declspecs, 1,
1167 $3, prefix_attributes);
1168 start_init ($<ttype>$, $2, global_bindings_p ()); }
1169 init
1170 /* Note how the declaration of the variable is in effect while its init is parsed! */
1171 { finish_init ();
1172 finish_decl ($<ttype>5, $6, $2); }
1173 | declarator maybeasm maybe_attribute
1174 { tree d = start_decl ($1, current_declspecs, 0,
1175 $3, prefix_attributes);
1176 finish_decl (d, NULL_TREE, $2);
1177 }
1178 ;
1179
1180 notype_initdcl:
1181 notype_declarator maybeasm maybe_attribute '='
1182 { $<ttype>$ = start_decl ($1, current_declspecs, 1,
1183 $3, prefix_attributes);
1184 start_init ($<ttype>$, $2, global_bindings_p ()); }
1185 init
1186 /* Note how the declaration of the variable is in effect while its init is parsed! */
1187 { finish_init ();
1188 decl_attributes ($<ttype>5, $3, prefix_attributes);
1189 finish_decl ($<ttype>5, $6, $2); }
1190 | notype_declarator maybeasm maybe_attribute
1191 { tree d = start_decl ($1, current_declspecs, 0,
1192 $3, prefix_attributes);
1193 finish_decl (d, NULL_TREE, $2); }
1194 ;
1195 /* the * rules are dummies to accept the Apollo extended syntax
1196 so that the header files compile. */
1197 maybe_attribute:
1198 /* empty */
1199 { $$ = NULL_TREE; }
1200 | attributes
1201 { $$ = $1; }
1202 ;
1203
1204 attributes:
1205 attribute
1206 { $$ = $1; }
1207 | attributes attribute
1208 { $$ = chainon ($1, $2); }
1209 ;
1210
1211 attribute:
1212 ATTRIBUTE '(' '(' attribute_list ')' ')'
1213 { $$ = $4; }
1214 ;
1215
1216 attribute_list:
1217 attrib
1218 { $$ = $1; }
1219 | attribute_list ',' attrib
1220 { $$ = chainon ($1, $3); }
1221 ;
1222
1223 attrib:
1224 /* empty */
1225 { $$ = NULL_TREE; }
1226 | any_word
1227 { $$ = build_tree_list ($1, NULL_TREE); }
1228 | any_word '(' IDENTIFIER ')'
1229 { $$ = build_tree_list ($1, build_tree_list (NULL_TREE, $3)); }
1230 | any_word '(' IDENTIFIER ',' nonnull_exprlist ')'
1231 { $$ = build_tree_list ($1, tree_cons (NULL_TREE, $3, $5)); }
1232 | any_word '(' exprlist ')'
1233 { $$ = build_tree_list ($1, $3); }
1234 ;
1235
1236 /* This still leaves out most reserved keywords,
1237 shouldn't we include them? */
1238
1239 any_word:
1240 identifier
1241 | SCSPEC
1242 | TYPESPEC
1243 | TYPE_QUAL
1244 ;
1245 \f
1246 /* Initializers. `init' is the entry point. */
1247
1248 init:
1249 expr_no_commas
1250 | '{'
1251 { really_start_incremental_init (NULL_TREE);
1252 /* Note that the call to clear_momentary
1253 is in process_init_element. */
1254 push_momentary (); }
1255 initlist_maybe_comma '}'
1256 { $$ = pop_init_level (0);
1257 if ($$ == error_mark_node
1258 && ! (yychar == STRING || yychar == CONSTANT))
1259 pop_momentary ();
1260 else
1261 pop_momentary_nofree (); }
1262
1263 | error
1264 { $$ = error_mark_node; }
1265 ;
1266
1267 /* `initlist_maybe_comma' is the guts of an initializer in braces. */
1268 initlist_maybe_comma:
1269 /* empty */
1270 { if (pedantic)
1271 pedwarn ("ANSI C forbids empty initializer braces"); }
1272 | initlist1 maybecomma
1273 ;
1274
1275 initlist1:
1276 initelt
1277 | initlist1 ',' initelt
1278 ;
1279
1280 /* `initelt' is a single element of an initializer.
1281 It may use braces. */
1282 initelt:
1283 expr_no_commas
1284 { process_init_element ($1); }
1285 | '{'
1286 { push_init_level (0); }
1287 initlist_maybe_comma '}'
1288 { process_init_element (pop_init_level (0)); }
1289 | error
1290 /* These are for labeled elements. The syntax for an array element
1291 initializer conflicts with the syntax for an Objective-C message,
1292 so don't include these productions in the Objective-C grammar. */
1293 ifc
1294 | '[' expr_no_commas ELLIPSIS expr_no_commas ']' '='
1295 { set_init_index ($2, $4); }
1296 initelt
1297 | '[' expr_no_commas ']' '='
1298 { set_init_index ($2, NULL_TREE); }
1299 initelt
1300 | '[' expr_no_commas ']'
1301 { set_init_index ($2, NULL_TREE); }
1302 initelt
1303 end ifc
1304 | identifier ':'
1305 { set_init_label ($1); }
1306 initelt
1307 | '.' identifier '='
1308 { set_init_label ($2); }
1309 initelt
1310 ;
1311 \f
1312 nested_function:
1313 declarator
1314 { push_c_function_context ();
1315 if (! start_function (current_declspecs, $1,
1316 prefix_attributes, NULL_TREE, 1))
1317 {
1318 pop_c_function_context ();
1319 YYERROR1;
1320 }
1321 reinit_parse_for_function (); }
1322 old_style_parm_decls
1323 { store_parm_decls (); }
1324 /* This used to use compstmt_or_error.
1325 That caused a bug with input `f(g) int g {}',
1326 where the use of YYERROR1 above caused an error
1327 which then was handled by compstmt_or_error.
1328 There followed a repeated execution of that same rule,
1329 which called YYERROR1 again, and so on. */
1330 compstmt
1331 { finish_function (1);
1332 pop_c_function_context (); }
1333 ;
1334
1335 notype_nested_function:
1336 notype_declarator
1337 { push_c_function_context ();
1338 if (! start_function (current_declspecs, $1,
1339 prefix_attributes, NULL_TREE, 1))
1340 {
1341 pop_c_function_context ();
1342 YYERROR1;
1343 }
1344 reinit_parse_for_function (); }
1345 old_style_parm_decls
1346 { store_parm_decls (); }
1347 /* This used to use compstmt_or_error.
1348 That caused a bug with input `f(g) int g {}',
1349 where the use of YYERROR1 above caused an error
1350 which then was handled by compstmt_or_error.
1351 There followed a repeated execution of that same rule,
1352 which called YYERROR1 again, and so on. */
1353 compstmt
1354 { finish_function (1);
1355 pop_c_function_context (); }
1356 ;
1357
1358 /* Any kind of declarator (thus, all declarators allowed
1359 after an explicit typespec). */
1360
1361 declarator:
1362 after_type_declarator
1363 | notype_declarator
1364 ;
1365
1366 /* A declarator that is allowed only after an explicit typespec. */
1367
1368 after_type_declarator:
1369 '(' after_type_declarator ')'
1370 { $$ = $2; }
1371 | after_type_declarator '(' parmlist_or_identifiers %prec '.'
1372 { $$ = build_nt (CALL_EXPR, $1, $3, NULL_TREE); }
1373 /* | after_type_declarator '(' error ')' %prec '.'
1374 { $$ = build_nt (CALL_EXPR, $1, NULL_TREE, NULL_TREE);
1375 poplevel (0, 0, 0); } */
1376 | after_type_declarator '[' expr ']' %prec '.'
1377 { $$ = build_nt (ARRAY_REF, $1, $3); }
1378 | after_type_declarator '[' ']' %prec '.'
1379 { $$ = build_nt (ARRAY_REF, $1, NULL_TREE); }
1380 | '*' type_quals after_type_declarator %prec UNARY
1381 { $$ = make_pointer_declarator ($2, $3); }
1382 /* ??? Yuck. setattrs is a quick hack. We can't use
1383 prefix_attributes because $1 only applies to this
1384 declarator. We assume setspecs has already been done.
1385 setattrs also avoids 5 reduce/reduce conflicts (otherwise multiple
1386 attributes could be recognized here or in `attributes'). */
1387 | attributes setattrs after_type_declarator
1388 { $$ = $3; }
1389 | TYPENAME
1390 ifobjc
1391 | OBJECTNAME
1392 end ifobjc
1393 ;
1394
1395 /* Kinds of declarator that can appear in a parameter list
1396 in addition to notype_declarator. This is like after_type_declarator
1397 but does not allow a typedef name in parentheses as an identifier
1398 (because it would conflict with a function with that typedef as arg). */
1399
1400 parm_declarator:
1401 parm_declarator '(' parmlist_or_identifiers %prec '.'
1402 { $$ = build_nt (CALL_EXPR, $1, $3, NULL_TREE); }
1403 /* | parm_declarator '(' error ')' %prec '.'
1404 { $$ = build_nt (CALL_EXPR, $1, NULL_TREE, NULL_TREE);
1405 poplevel (0, 0, 0); } */
1406 | parm_declarator '[' expr ']' %prec '.'
1407 { $$ = build_nt (ARRAY_REF, $1, $3); }
1408 | parm_declarator '[' ']' %prec '.'
1409 { $$ = build_nt (ARRAY_REF, $1, NULL_TREE); }
1410 | '*' type_quals parm_declarator %prec UNARY
1411 { $$ = make_pointer_declarator ($2, $3); }
1412 /* ??? Yuck. setattrs is a quick hack. We can't use
1413 prefix_attributes because $1 only applies to this
1414 declarator. We assume setspecs has already been done.
1415 setattrs also avoids 5 reduce/reduce conflicts (otherwise multiple
1416 attributes could be recognized here or in `attributes'). */
1417 | attributes setattrs parm_declarator
1418 { $$ = $3; }
1419 | TYPENAME
1420 ;
1421
1422 /* A declarator allowed whether or not there has been
1423 an explicit typespec. These cannot redeclare a typedef-name. */
1424
1425 notype_declarator:
1426 notype_declarator '(' parmlist_or_identifiers %prec '.'
1427 { $$ = build_nt (CALL_EXPR, $1, $3, NULL_TREE); }
1428 /* | notype_declarator '(' error ')' %prec '.'
1429 { $$ = build_nt (CALL_EXPR, $1, NULL_TREE, NULL_TREE);
1430 poplevel (0, 0, 0); } */
1431 | '(' notype_declarator ')'
1432 { $$ = $2; }
1433 | '*' type_quals notype_declarator %prec UNARY
1434 { $$ = make_pointer_declarator ($2, $3); }
1435 | notype_declarator '[' expr ']' %prec '.'
1436 { $$ = build_nt (ARRAY_REF, $1, $3); }
1437 | notype_declarator '[' ']' %prec '.'
1438 { $$ = build_nt (ARRAY_REF, $1, NULL_TREE); }
1439 /* ??? Yuck. setattrs is a quick hack. We can't use
1440 prefix_attributes because $1 only applies to this
1441 declarator. We assume setspecs has already been done.
1442 setattrs also avoids 5 reduce/reduce conflicts (otherwise multiple
1443 attributes could be recognized here or in `attributes'). */
1444 | attributes setattrs notype_declarator
1445 { $$ = $3; }
1446 | IDENTIFIER
1447 ;
1448
1449 structsp:
1450 STRUCT identifier '{'
1451 { $$ = start_struct (RECORD_TYPE, $2);
1452 /* Start scope of tag before parsing components. */
1453 }
1454 component_decl_list '}' maybe_attribute
1455 { $$ = finish_struct ($<ttype>4, $5, $7); }
1456 | STRUCT '{' component_decl_list '}' maybe_attribute
1457 { $$ = finish_struct (start_struct (RECORD_TYPE, NULL_TREE),
1458 $3, $5);
1459 }
1460 | STRUCT identifier
1461 { $$ = xref_tag (RECORD_TYPE, $2); }
1462 | UNION identifier '{'
1463 { $$ = start_struct (UNION_TYPE, $2); }
1464 component_decl_list '}' maybe_attribute
1465 { $$ = finish_struct ($<ttype>4, $5, $7); }
1466 | UNION '{' component_decl_list '}' maybe_attribute
1467 { $$ = finish_struct (start_struct (UNION_TYPE, NULL_TREE),
1468 $3, $5);
1469 }
1470 | UNION identifier
1471 { $$ = xref_tag (UNION_TYPE, $2); }
1472 | ENUM identifier '{'
1473 { $<itype>3 = suspend_momentary ();
1474 $$ = start_enum ($2); }
1475 enumlist maybecomma_warn '}' maybe_attribute
1476 { $$ = finish_enum ($<ttype>4, nreverse ($5), $8);
1477 resume_momentary ($<itype>3); }
1478 | ENUM '{'
1479 { $<itype>2 = suspend_momentary ();
1480 $$ = start_enum (NULL_TREE); }
1481 enumlist maybecomma_warn '}' maybe_attribute
1482 { $$ = finish_enum ($<ttype>3, nreverse ($4), $7);
1483 resume_momentary ($<itype>2); }
1484 | ENUM identifier
1485 { $$ = xref_tag (ENUMERAL_TYPE, $2); }
1486 ;
1487
1488 maybecomma:
1489 /* empty */
1490 | ','
1491 ;
1492
1493 maybecomma_warn:
1494 /* empty */
1495 | ','
1496 { if (pedantic) pedwarn ("comma at end of enumerator list"); }
1497 ;
1498
1499 component_decl_list:
1500 component_decl_list2
1501 { $$ = $1; }
1502 | component_decl_list2 component_decl
1503 { $$ = chainon ($1, $2);
1504 pedwarn ("no semicolon at end of struct or union"); }
1505 ;
1506
1507 component_decl_list2: /* empty */
1508 { $$ = NULL_TREE; }
1509 | component_decl_list2 component_decl ';'
1510 { $$ = chainon ($1, $2); }
1511 | component_decl_list2 ';'
1512 { if (pedantic)
1513 pedwarn ("extra semicolon in struct or union specified"); }
1514 ifobjc
1515 /* foo(sizeof(struct{ @defs(ClassName)})); */
1516 | DEFS '(' CLASSNAME ')'
1517 {
1518 tree interface = lookup_interface ($3);
1519
1520 if (interface)
1521 $$ = get_class_ivars (interface);
1522 else
1523 {
1524 error ("Cannot find interface declaration for `%s'",
1525 IDENTIFIER_POINTER ($3));
1526 $$ = NULL_TREE;
1527 }
1528 }
1529 end ifobjc
1530 ;
1531
1532 /* There is a shift-reduce conflict here, because `components' may
1533 start with a `typename'. It happens that shifting (the default resolution)
1534 does the right thing, because it treats the `typename' as part of
1535 a `typed_typespecs'.
1536
1537 It is possible that this same technique would allow the distinction
1538 between `notype_initdecls' and `initdecls' to be eliminated.
1539 But I am being cautious and not trying it. */
1540
1541 component_decl:
1542 typed_typespecs setspecs components
1543 { $$ = $3;
1544 current_declspecs = TREE_VALUE (declspec_stack);
1545 prefix_attributes = TREE_PURPOSE (declspec_stack);
1546 declspec_stack = TREE_CHAIN (declspec_stack);
1547 resume_momentary ($2); }
1548 | typed_typespecs
1549 { if (pedantic)
1550 pedwarn ("ANSI C forbids member declarations with no members");
1551 shadow_tag($1);
1552 $$ = NULL_TREE; }
1553 | nonempty_type_quals setspecs components
1554 { $$ = $3;
1555 current_declspecs = TREE_VALUE (declspec_stack);
1556 prefix_attributes = TREE_PURPOSE (declspec_stack);
1557 declspec_stack = TREE_CHAIN (declspec_stack);
1558 resume_momentary ($2); }
1559 | nonempty_type_quals
1560 { if (pedantic)
1561 pedwarn ("ANSI C forbids member declarations with no members");
1562 shadow_tag($1);
1563 $$ = NULL_TREE; }
1564 | error
1565 { $$ = NULL_TREE; }
1566 | extension component_decl
1567 { $$ = $2;
1568 pedantic = $<itype>1; }
1569 ;
1570
1571 components:
1572 component_declarator
1573 | components ',' component_declarator
1574 { $$ = chainon ($1, $3); }
1575 ;
1576
1577 component_declarator:
1578 save_filename save_lineno declarator maybe_attribute
1579 { $$ = grokfield ($1, $2, $3, current_declspecs, NULL_TREE);
1580 decl_attributes ($$, $4, prefix_attributes); }
1581 | save_filename save_lineno
1582 declarator ':' expr_no_commas maybe_attribute
1583 { $$ = grokfield ($1, $2, $3, current_declspecs, $5);
1584 decl_attributes ($$, $6, prefix_attributes); }
1585 | save_filename save_lineno ':' expr_no_commas maybe_attribute
1586 { $$ = grokfield ($1, $2, NULL_TREE, current_declspecs, $4);
1587 decl_attributes ($$, $5, prefix_attributes); }
1588 ;
1589
1590 /* We chain the enumerators in reverse order.
1591 They are put in forward order where enumlist is used.
1592 (The order used to be significant, but no longer is so.
1593 However, we still maintain the order, just to be clean.) */
1594
1595 enumlist:
1596 enumerator
1597 | enumlist ',' enumerator
1598 { if ($1 == error_mark_node)
1599 $$ = $1;
1600 else
1601 $$ = chainon ($3, $1); }
1602 | error
1603 { $$ = error_mark_node; }
1604 ;
1605
1606
1607 enumerator:
1608 identifier
1609 { $$ = build_enumerator ($1, NULL_TREE); }
1610 | identifier '=' expr_no_commas
1611 { $$ = build_enumerator ($1, $3); }
1612 ;
1613
1614 typename:
1615 typed_typespecs absdcl
1616 { $$ = build_tree_list ($1, $2); }
1617 | nonempty_type_quals absdcl
1618 { $$ = build_tree_list ($1, $2); }
1619 ;
1620
1621 absdcl: /* an absolute declarator */
1622 /* empty */
1623 { $$ = NULL_TREE; }
1624 | absdcl1
1625 ;
1626
1627 nonempty_type_quals:
1628 TYPE_QUAL
1629 { $$ = tree_cons (NULL_TREE, $1, NULL_TREE); }
1630 | nonempty_type_quals TYPE_QUAL
1631 { $$ = tree_cons (NULL_TREE, $2, $1); }
1632 ;
1633
1634 type_quals:
1635 /* empty */
1636 { $$ = NULL_TREE; }
1637 | type_quals TYPE_QUAL
1638 { $$ = tree_cons (NULL_TREE, $2, $1); }
1639 ;
1640
1641 absdcl1: /* a nonempty absolute declarator */
1642 '(' absdcl1 ')'
1643 { $$ = $2; }
1644 /* `(typedef)1' is `int'. */
1645 | '*' type_quals absdcl1 %prec UNARY
1646 { $$ = make_pointer_declarator ($2, $3); }
1647 | '*' type_quals %prec UNARY
1648 { $$ = make_pointer_declarator ($2, NULL_TREE); }
1649 | absdcl1 '(' parmlist %prec '.'
1650 { $$ = build_nt (CALL_EXPR, $1, $3, NULL_TREE); }
1651 | absdcl1 '[' expr ']' %prec '.'
1652 { $$ = build_nt (ARRAY_REF, $1, $3); }
1653 | absdcl1 '[' ']' %prec '.'
1654 { $$ = build_nt (ARRAY_REF, $1, NULL_TREE); }
1655 | '(' parmlist %prec '.'
1656 { $$ = build_nt (CALL_EXPR, NULL_TREE, $2, NULL_TREE); }
1657 | '[' expr ']' %prec '.'
1658 { $$ = build_nt (ARRAY_REF, NULL_TREE, $2); }
1659 | '[' ']' %prec '.'
1660 { $$ = build_nt (ARRAY_REF, NULL_TREE, NULL_TREE); }
1661 /* ??? It appears we have to support attributes here, however
1662 using prefix_attributes is wrong. */
1663 ;
1664
1665 /* at least one statement, the first of which parses without error. */
1666 /* stmts is used only after decls, so an invalid first statement
1667 is actually regarded as an invalid decl and part of the decls. */
1668
1669 stmts:
1670 lineno_stmt_or_labels
1671 {
1672 if (pedantic && $1)
1673 pedwarn ("ANSI C forbids label at end of compound statement");
1674 }
1675 ;
1676
1677 lineno_stmt_or_labels:
1678 lineno_stmt_or_label
1679 | lineno_stmt_or_labels lineno_stmt_or_label
1680 { $$ = $2; }
1681 | lineno_stmt_or_labels errstmt
1682 { $$ = 0; }
1683 ;
1684
1685 xstmts:
1686 /* empty */
1687 | stmts
1688 ;
1689
1690 errstmt: error ';'
1691 ;
1692
1693 pushlevel: /* empty */
1694 { emit_line_note (input_filename, lineno);
1695 pushlevel (0);
1696 clear_last_expr ();
1697 push_momentary ();
1698 expand_start_bindings (0);
1699 ifobjc
1700 if (objc_method_context)
1701 add_objc_decls ();
1702 end ifobjc
1703 }
1704 ;
1705
1706 /* Read zero or more forward-declarations for labels
1707 that nested functions can jump to. */
1708 maybe_label_decls:
1709 /* empty */
1710 | label_decls
1711 { if (pedantic)
1712 pedwarn ("ANSI C forbids label declarations"); }
1713 ;
1714
1715 label_decls:
1716 label_decl
1717 | label_decls label_decl
1718 ;
1719
1720 label_decl:
1721 LABEL identifiers_or_typenames ';'
1722 { tree link;
1723 for (link = $2; link; link = TREE_CHAIN (link))
1724 {
1725 tree label = shadow_label (TREE_VALUE (link));
1726 C_DECLARED_LABEL_FLAG (label) = 1;
1727 declare_nonlocal_label (label);
1728 }
1729 }
1730 ;
1731
1732 /* This is the body of a function definition.
1733 It causes syntax errors to ignore to the next openbrace. */
1734 compstmt_or_error:
1735 compstmt
1736 {}
1737 | error compstmt
1738 ;
1739
1740 compstmt_start: '{' { compstmt_count++; }
1741
1742 compstmt: compstmt_start '}'
1743 { $$ = convert (void_type_node, integer_zero_node); }
1744 | compstmt_start pushlevel maybe_label_decls decls xstmts '}'
1745 { emit_line_note (input_filename, lineno);
1746 expand_end_bindings (getdecls (), 1, 0);
1747 $$ = poplevel (1, 1, 0);
1748 if (yychar == CONSTANT || yychar == STRING)
1749 pop_momentary_nofree ();
1750 else
1751 pop_momentary (); }
1752 | compstmt_start pushlevel maybe_label_decls error '}'
1753 { emit_line_note (input_filename, lineno);
1754 expand_end_bindings (getdecls (), kept_level_p (), 0);
1755 $$ = poplevel (kept_level_p (), 0, 0);
1756 if (yychar == CONSTANT || yychar == STRING)
1757 pop_momentary_nofree ();
1758 else
1759 pop_momentary (); }
1760 | compstmt_start pushlevel maybe_label_decls stmts '}'
1761 { emit_line_note (input_filename, lineno);
1762 expand_end_bindings (getdecls (), kept_level_p (), 0);
1763 $$ = poplevel (kept_level_p (), 0, 0);
1764 if (yychar == CONSTANT || yychar == STRING)
1765 pop_momentary_nofree ();
1766 else
1767 pop_momentary (); }
1768 ;
1769
1770 /* Value is number of statements counted as of the closeparen. */
1771 simple_if:
1772 if_prefix lineno_labeled_stmt
1773 /* Make sure c_expand_end_cond is run once
1774 for each call to c_expand_start_cond.
1775 Otherwise a crash is likely. */
1776 | if_prefix error
1777 ;
1778
1779 if_prefix:
1780 IF '(' expr ')'
1781 { emit_line_note ($<filename>-1, $<lineno>0);
1782 c_expand_start_cond (truthvalue_conversion ($3), 0,
1783 compstmt_count);
1784 $<itype>$ = stmt_count;
1785 if_stmt_file = $<filename>-1;
1786 if_stmt_line = $<lineno>0;
1787 position_after_white_space (); }
1788 ;
1789
1790 /* This is a subroutine of stmt.
1791 It is used twice, once for valid DO statements
1792 and once for catching errors in parsing the end test. */
1793 do_stmt_start:
1794 DO
1795 { stmt_count++;
1796 compstmt_count++;
1797 emit_line_note ($<filename>-1, $<lineno>0);
1798 /* See comment in `while' alternative, above. */
1799 emit_nop ();
1800 expand_start_loop_continue_elsewhere (1);
1801 position_after_white_space (); }
1802 lineno_labeled_stmt WHILE
1803 { expand_loop_continue_here (); }
1804 ;
1805
1806 save_filename:
1807 { $$ = input_filename; }
1808 ;
1809
1810 save_lineno:
1811 { $$ = lineno; }
1812 ;
1813
1814 lineno_labeled_stmt:
1815 save_filename save_lineno stmt
1816 { }
1817 /* | save_filename save_lineno error
1818 { }
1819 */
1820 | save_filename save_lineno label lineno_labeled_stmt
1821 { }
1822 ;
1823
1824 lineno_stmt_or_label:
1825 save_filename save_lineno stmt_or_label
1826 { $$ = $3; }
1827 ;
1828
1829 stmt_or_label:
1830 stmt
1831 { $$ = 0; }
1832 | label
1833 { $$ = 1; }
1834 ;
1835
1836 /* Parse a single real statement, not including any labels. */
1837 stmt:
1838 compstmt
1839 { stmt_count++; }
1840 | all_iter_stmt
1841 | expr ';'
1842 { stmt_count++;
1843 emit_line_note ($<filename>-1, $<lineno>0);
1844 /* It appears that this should not be done--that a non-lvalue array
1845 shouldn't get an error if the value isn't used.
1846 Section 3.2.2.1 says that an array lvalue gets converted to a pointer
1847 if it appears as a top-level expression,
1848 but says nothing about non-lvalue arrays. */
1849 #if 0
1850 /* Call default_conversion to get an error
1851 on referring to a register array if pedantic. */
1852 if (TREE_CODE (TREE_TYPE ($1)) == ARRAY_TYPE
1853 || TREE_CODE (TREE_TYPE ($1)) == FUNCTION_TYPE)
1854 $1 = default_conversion ($1);
1855 #endif
1856 iterator_expand ($1);
1857 clear_momentary (); }
1858 | simple_if ELSE
1859 { c_expand_start_else ();
1860 $<itype>1 = stmt_count;
1861 position_after_white_space (); }
1862 lineno_labeled_stmt
1863 { c_expand_end_cond ();
1864 if (extra_warnings && stmt_count == $<itype>1)
1865 warning ("empty body in an else-statement"); }
1866 | simple_if %prec IF
1867 { c_expand_end_cond ();
1868 /* This warning is here instead of in simple_if, because we
1869 do not want a warning if an empty if is followed by an
1870 else statement. Increment stmt_count so we don't
1871 give a second error if this is a nested `if'. */
1872 if (extra_warnings && stmt_count++ == $<itype>1)
1873 warning_with_file_and_line (if_stmt_file, if_stmt_line,
1874 "empty body in an if-statement"); }
1875 /* Make sure c_expand_end_cond is run once
1876 for each call to c_expand_start_cond.
1877 Otherwise a crash is likely. */
1878 | simple_if ELSE error
1879 { c_expand_end_cond (); }
1880 | WHILE
1881 { stmt_count++;
1882 emit_line_note ($<filename>-1, $<lineno>0);
1883 /* The emit_nop used to come before emit_line_note,
1884 but that made the nop seem like part of the preceding line.
1885 And that was confusing when the preceding line was
1886 inside of an if statement and was not really executed.
1887 I think it ought to work to put the nop after the line number.
1888 We will see. --rms, July 15, 1991. */
1889 emit_nop (); }
1890 '(' expr ')'
1891 { /* Don't start the loop till we have succeeded
1892 in parsing the end test. This is to make sure
1893 that we end every loop we start. */
1894 expand_start_loop (1);
1895 emit_line_note (input_filename, lineno);
1896 expand_exit_loop_if_false (NULL_PTR,
1897 truthvalue_conversion ($4));
1898 position_after_white_space (); }
1899 lineno_labeled_stmt
1900 { expand_end_loop (); }
1901 | do_stmt_start
1902 '(' expr ')' ';'
1903 { emit_line_note (input_filename, lineno);
1904 expand_exit_loop_if_false (NULL_PTR,
1905 truthvalue_conversion ($3));
1906 expand_end_loop ();
1907 clear_momentary (); }
1908 /* This rule is needed to make sure we end every loop we start. */
1909 | do_stmt_start error
1910 { expand_end_loop ();
1911 clear_momentary (); }
1912 | FOR
1913 '(' xexpr ';'
1914 { stmt_count++;
1915 emit_line_note ($<filename>-1, $<lineno>0);
1916 /* See comment in `while' alternative, above. */
1917 emit_nop ();
1918 if ($3) c_expand_expr_stmt ($3);
1919 /* Next step is to call expand_start_loop_continue_elsewhere,
1920 but wait till after we parse the entire for (...).
1921 Otherwise, invalid input might cause us to call that
1922 fn without calling expand_end_loop. */
1923 }
1924 xexpr ';'
1925 /* Can't emit now; wait till after expand_start_loop... */
1926 { $<lineno>7 = lineno;
1927 $<filename>$ = input_filename; }
1928 xexpr ')'
1929 {
1930 /* Start the loop. Doing this after parsing
1931 all the expressions ensures we will end the loop. */
1932 expand_start_loop_continue_elsewhere (1);
1933 /* Emit the end-test, with a line number. */
1934 emit_line_note ($<filename>8, $<lineno>7);
1935 if ($6)
1936 expand_exit_loop_if_false (NULL_PTR,
1937 truthvalue_conversion ($6));
1938 /* Don't let the tree nodes for $9 be discarded by
1939 clear_momentary during the parsing of the next stmt. */
1940 push_momentary ();
1941 $<lineno>7 = lineno;
1942 $<filename>8 = input_filename;
1943 position_after_white_space (); }
1944 lineno_labeled_stmt
1945 { /* Emit the increment expression, with a line number. */
1946 emit_line_note ($<filename>8, $<lineno>7);
1947 expand_loop_continue_here ();
1948 if ($9)
1949 c_expand_expr_stmt ($9);
1950 if (yychar == CONSTANT || yychar == STRING)
1951 pop_momentary_nofree ();
1952 else
1953 pop_momentary ();
1954 expand_end_loop (); }
1955 | SWITCH '(' expr ')'
1956 { stmt_count++;
1957 emit_line_note ($<filename>-1, $<lineno>0);
1958 c_expand_start_case ($3);
1959 /* Don't let the tree nodes for $3 be discarded by
1960 clear_momentary during the parsing of the next stmt. */
1961 push_momentary ();
1962 position_after_white_space (); }
1963 lineno_labeled_stmt
1964 { expand_end_case ($3);
1965 if (yychar == CONSTANT || yychar == STRING)
1966 pop_momentary_nofree ();
1967 else
1968 pop_momentary (); }
1969 | BREAK ';'
1970 { stmt_count++;
1971 emit_line_note ($<filename>-1, $<lineno>0);
1972 if ( ! expand_exit_something ())
1973 error ("break statement not within loop or switch"); }
1974 | CONTINUE ';'
1975 { stmt_count++;
1976 emit_line_note ($<filename>-1, $<lineno>0);
1977 if (! expand_continue_loop (NULL_PTR))
1978 error ("continue statement not within a loop"); }
1979 | RETURN ';'
1980 { stmt_count++;
1981 emit_line_note ($<filename>-1, $<lineno>0);
1982 c_expand_return (NULL_TREE); }
1983 | RETURN expr ';'
1984 { stmt_count++;
1985 emit_line_note ($<filename>-1, $<lineno>0);
1986 c_expand_return ($2); }
1987 | ASM_KEYWORD maybe_type_qual '(' expr ')' ';'
1988 { stmt_count++;
1989 emit_line_note ($<filename>-1, $<lineno>0);
1990 STRIP_NOPS ($4);
1991 if ((TREE_CODE ($4) == ADDR_EXPR
1992 && TREE_CODE (TREE_OPERAND ($4, 0)) == STRING_CST)
1993 || TREE_CODE ($4) == STRING_CST)
1994 expand_asm ($4);
1995 else
1996 error ("argument of `asm' is not a constant string"); }
1997 /* This is the case with just output operands. */
1998 | ASM_KEYWORD maybe_type_qual '(' expr ':' asm_operands ')' ';'
1999 { stmt_count++;
2000 emit_line_note ($<filename>-1, $<lineno>0);
2001 c_expand_asm_operands ($4, $6, NULL_TREE, NULL_TREE,
2002 $2 == ridpointers[(int)RID_VOLATILE],
2003 input_filename, lineno); }
2004 /* This is the case with input operands as well. */
2005 | ASM_KEYWORD maybe_type_qual '(' expr ':' asm_operands ':' asm_operands ')' ';'
2006 { stmt_count++;
2007 emit_line_note ($<filename>-1, $<lineno>0);
2008 c_expand_asm_operands ($4, $6, $8, NULL_TREE,
2009 $2 == ridpointers[(int)RID_VOLATILE],
2010 input_filename, lineno); }
2011 /* This is the case with clobbered registers as well. */
2012 | ASM_KEYWORD maybe_type_qual '(' expr ':' asm_operands ':'
2013 asm_operands ':' asm_clobbers ')' ';'
2014 { stmt_count++;
2015 emit_line_note ($<filename>-1, $<lineno>0);
2016 c_expand_asm_operands ($4, $6, $8, $10,
2017 $2 == ridpointers[(int)RID_VOLATILE],
2018 input_filename, lineno); }
2019 | GOTO identifier ';'
2020 { tree decl;
2021 stmt_count++;
2022 emit_line_note ($<filename>-1, $<lineno>0);
2023 decl = lookup_label ($2);
2024 if (decl != 0)
2025 {
2026 TREE_USED (decl) = 1;
2027 expand_goto (decl);
2028 }
2029 }
2030 | GOTO '*' expr ';'
2031 { if (pedantic)
2032 pedwarn ("ANSI C forbids `goto *expr;'");
2033 stmt_count++;
2034 emit_line_note ($<filename>-1, $<lineno>0);
2035 expand_computed_goto (convert (ptr_type_node, $3)); }
2036 | ';'
2037 ;
2038
2039 all_iter_stmt:
2040 all_iter_stmt_simple
2041 /* | all_iter_stmt_with_decl */
2042 ;
2043
2044 all_iter_stmt_simple:
2045 FOR '(' primary ')'
2046 {
2047 /* The value returned by this action is */
2048 /* 1 if everything is OK */
2049 /* 0 in case of error or already bound iterator */
2050
2051 $<itype>$ = 0;
2052 if (TREE_CODE ($3) != VAR_DECL)
2053 error ("invalid `for (ITERATOR)' syntax");
2054 else if (! ITERATOR_P ($3))
2055 error ("`%s' is not an iterator",
2056 IDENTIFIER_POINTER (DECL_NAME ($3)));
2057 else if (ITERATOR_BOUND_P ($3))
2058 error ("`for (%s)' inside expansion of same iterator",
2059 IDENTIFIER_POINTER (DECL_NAME ($3)));
2060 else
2061 {
2062 $<itype>$ = 1;
2063 iterator_for_loop_start ($3);
2064 }
2065 }
2066 lineno_labeled_stmt
2067 {
2068 if ($<itype>5)
2069 iterator_for_loop_end ($3);
2070 }
2071
2072 /* This really should allow any kind of declaration,
2073 for generality. Fix it before turning it back on.
2074
2075 all_iter_stmt_with_decl:
2076 FOR '(' ITERATOR pushlevel setspecs iterator_spec ')'
2077 {
2078 */ /* The value returned by this action is */
2079 /* 1 if everything is OK */
2080 /* 0 in case of error or already bound iterator */
2081 /*
2082 iterator_for_loop_start ($6);
2083 }
2084 lineno_labeled_stmt
2085 {
2086 iterator_for_loop_end ($6);
2087 emit_line_note (input_filename, lineno);
2088 expand_end_bindings (getdecls (), 1, 0);
2089 $<ttype>$ = poplevel (1, 1, 0);
2090 if (yychar == CONSTANT || yychar == STRING)
2091 pop_momentary_nofree ();
2092 else
2093 pop_momentary ();
2094 }
2095 */
2096
2097 /* Any kind of label, including jump labels and case labels.
2098 ANSI C accepts labels only before statements, but we allow them
2099 also at the end of a compound statement. */
2100
2101 label: CASE expr_no_commas ':'
2102 { register tree value = check_case_value ($2);
2103 register tree label
2104 = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE);
2105
2106 stmt_count++;
2107
2108 if (value != error_mark_node)
2109 {
2110 tree duplicate;
2111 int success = pushcase (value, convert_and_check,
2112 label, &duplicate);
2113 if (success == 1)
2114 error ("case label not within a switch statement");
2115 else if (success == 2)
2116 {
2117 error ("duplicate case value");
2118 error_with_decl (duplicate, "this is the first entry for that value");
2119 }
2120 else if (success == 3)
2121 warning ("case value out of range");
2122 else if (success == 5)
2123 error ("case label within scope of cleanup or variable array");
2124 }
2125 position_after_white_space (); }
2126 | CASE expr_no_commas ELLIPSIS expr_no_commas ':'
2127 { register tree value1 = check_case_value ($2);
2128 register tree value2 = check_case_value ($4);
2129 register tree label
2130 = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE);
2131
2132 if (pedantic)
2133 pedwarn ("ANSI C forbids case ranges");
2134 stmt_count++;
2135
2136 if (value1 != error_mark_node && value2 != error_mark_node)
2137 {
2138 tree duplicate;
2139 int success = pushcase_range (value1, value2,
2140 convert_and_check, label,
2141 &duplicate);
2142 if (success == 1)
2143 error ("case label not within a switch statement");
2144 else if (success == 2)
2145 {
2146 error ("duplicate case value");
2147 error_with_decl (duplicate, "this is the first entry for that value");
2148 }
2149 else if (success == 3)
2150 warning ("case value out of range");
2151 else if (success == 4)
2152 warning ("empty case range");
2153 else if (success == 5)
2154 error ("case label within scope of cleanup or variable array");
2155 }
2156 position_after_white_space (); }
2157 | DEFAULT ':'
2158 {
2159 tree duplicate;
2160 register tree label
2161 = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE);
2162 int success = pushcase (NULL_TREE, 0, label, &duplicate);
2163 stmt_count++;
2164 if (success == 1)
2165 error ("default label not within a switch statement");
2166 else if (success == 2)
2167 {
2168 error ("multiple default labels in one switch");
2169 error_with_decl (duplicate, "this is the first default label");
2170 }
2171 position_after_white_space (); }
2172 | identifier ':'
2173 { tree label = define_label (input_filename, lineno, $1);
2174 stmt_count++;
2175 emit_nop ();
2176 if (label)
2177 expand_label (label);
2178 position_after_white_space (); }
2179 ;
2180
2181 /* Either a type-qualifier or nothing. First thing in an `asm' statement. */
2182
2183 maybe_type_qual:
2184 /* empty */
2185 { emit_line_note (input_filename, lineno);
2186 $$ = NULL_TREE; }
2187 | TYPE_QUAL
2188 { emit_line_note (input_filename, lineno); }
2189 ;
2190
2191 xexpr:
2192 /* empty */
2193 { $$ = NULL_TREE; }
2194 | expr
2195 ;
2196
2197 /* These are the operands other than the first string and colon
2198 in asm ("addextend %2,%1": "=dm" (x), "0" (y), "g" (*x)) */
2199 asm_operands: /* empty */
2200 { $$ = NULL_TREE; }
2201 | nonnull_asm_operands
2202 ;
2203
2204 nonnull_asm_operands:
2205 asm_operand
2206 | nonnull_asm_operands ',' asm_operand
2207 { $$ = chainon ($1, $3); }
2208 ;
2209
2210 asm_operand:
2211 STRING '(' expr ')'
2212 { $$ = build_tree_list ($1, $3); }
2213 ;
2214
2215 asm_clobbers:
2216 string
2217 { $$ = tree_cons (NULL_TREE, combine_strings ($1), NULL_TREE); }
2218 | asm_clobbers ',' string
2219 { $$ = tree_cons (NULL_TREE, combine_strings ($3), $1); }
2220 ;
2221 \f
2222 /* This is what appears inside the parens in a function declarator.
2223 Its value is a list of ..._TYPE nodes. */
2224 parmlist:
2225 { pushlevel (0);
2226 clear_parm_order ();
2227 declare_parm_level (0); }
2228 parmlist_1
2229 { $$ = $2;
2230 parmlist_tags_warning ();
2231 poplevel (0, 0, 0); }
2232 ;
2233
2234 parmlist_1:
2235 parmlist_2 ')'
2236 | parms ';'
2237 { tree parm;
2238 if (pedantic)
2239 pedwarn ("ANSI C forbids forward parameter declarations");
2240 /* Mark the forward decls as such. */
2241 for (parm = getdecls (); parm; parm = TREE_CHAIN (parm))
2242 TREE_ASM_WRITTEN (parm) = 1;
2243 clear_parm_order (); }
2244 parmlist_1
2245 { $$ = $4; }
2246 | error ')'
2247 { $$ = tree_cons (NULL_TREE, NULL_TREE, NULL_TREE); }
2248 ;
2249
2250 /* This is what appears inside the parens in a function declarator.
2251 Is value is represented in the format that grokdeclarator expects. */
2252 parmlist_2: /* empty */
2253 { $$ = get_parm_info (0); }
2254 | ELLIPSIS
2255 { $$ = get_parm_info (0);
2256 /* Gcc used to allow this as an extension. However, it does
2257 not work for all targets, and thus has been disabled.
2258 Also, since func (...) and func () are indistinguishable,
2259 it caused problems with the code in expand_builtin which
2260 tries to verify that BUILT_IN_NEXT_ARG is being used
2261 correctly. */
2262 error ("ANSI C requires a named argument before `...'");
2263 }
2264 | parms
2265 { $$ = get_parm_info (1); }
2266 | parms ',' ELLIPSIS
2267 { $$ = get_parm_info (0); }
2268 ;
2269
2270 parms:
2271 parm
2272 { push_parm_decl ($1); }
2273 | parms ',' parm
2274 { push_parm_decl ($3); }
2275 ;
2276
2277 /* A single parameter declaration or parameter type name,
2278 as found in a parmlist. */
2279 parm:
2280 typed_declspecs setspecs parm_declarator maybe_attribute
2281 { $$ = build_tree_list (build_tree_list (current_declspecs,
2282 $3),
2283 build_tree_list (prefix_attributes,
2284 $4));
2285 current_declspecs = TREE_VALUE (declspec_stack);
2286 prefix_attributes = TREE_PURPOSE (declspec_stack);
2287 declspec_stack = TREE_CHAIN (declspec_stack);
2288 resume_momentary ($2); }
2289 | typed_declspecs setspecs notype_declarator maybe_attribute
2290 { $$ = build_tree_list (build_tree_list (current_declspecs,
2291 $3),
2292 build_tree_list (prefix_attributes,
2293 $4));
2294 current_declspecs = TREE_VALUE (declspec_stack);
2295 prefix_attributes = TREE_PURPOSE (declspec_stack);
2296 declspec_stack = TREE_CHAIN (declspec_stack);
2297 resume_momentary ($2); }
2298 | typed_declspecs setspecs absdcl maybe_attribute
2299 { $$ = build_tree_list (build_tree_list (current_declspecs,
2300 $3),
2301 build_tree_list (prefix_attributes,
2302 $4));
2303 current_declspecs = TREE_VALUE (declspec_stack);
2304 prefix_attributes = TREE_PURPOSE (declspec_stack);
2305 declspec_stack = TREE_CHAIN (declspec_stack);
2306 resume_momentary ($2); }
2307 | declmods setspecs notype_declarator maybe_attribute
2308 { $$ = build_tree_list (build_tree_list (current_declspecs,
2309 $3),
2310 build_tree_list (prefix_attributes,
2311 $4));
2312 current_declspecs = TREE_VALUE (declspec_stack);
2313 prefix_attributes = TREE_PURPOSE (declspec_stack);
2314 declspec_stack = TREE_CHAIN (declspec_stack);
2315 resume_momentary ($2); }
2316
2317 | declmods setspecs absdcl maybe_attribute
2318 { $$ = build_tree_list (build_tree_list (current_declspecs,
2319 $3),
2320 build_tree_list (prefix_attributes,
2321 $4));
2322 current_declspecs = TREE_VALUE (declspec_stack);
2323 prefix_attributes = TREE_PURPOSE (declspec_stack);
2324 declspec_stack = TREE_CHAIN (declspec_stack);
2325 resume_momentary ($2); }
2326 ;
2327
2328 /* This is used in a function definition
2329 where either a parmlist or an identifier list is ok.
2330 Its value is a list of ..._TYPE nodes or a list of identifiers. */
2331 parmlist_or_identifiers:
2332 { pushlevel (0);
2333 clear_parm_order ();
2334 declare_parm_level (1); }
2335 parmlist_or_identifiers_1
2336 { $$ = $2;
2337 parmlist_tags_warning ();
2338 poplevel (0, 0, 0); }
2339 ;
2340
2341 parmlist_or_identifiers_1:
2342 parmlist_1
2343 | identifiers ')'
2344 { tree t;
2345 for (t = $1; t; t = TREE_CHAIN (t))
2346 if (TREE_VALUE (t) == NULL_TREE)
2347 error ("`...' in old-style identifier list");
2348 $$ = tree_cons (NULL_TREE, NULL_TREE, $1); }
2349 ;
2350
2351 /* A nonempty list of identifiers. */
2352 identifiers:
2353 IDENTIFIER
2354 { $$ = build_tree_list (NULL_TREE, $1); }
2355 | identifiers ',' IDENTIFIER
2356 { $$ = chainon ($1, build_tree_list (NULL_TREE, $3)); }
2357 ;
2358
2359 /* A nonempty list of identifiers, including typenames. */
2360 identifiers_or_typenames:
2361 identifier
2362 { $$ = build_tree_list (NULL_TREE, $1); }
2363 | identifiers_or_typenames ',' identifier
2364 { $$ = chainon ($1, build_tree_list (NULL_TREE, $3)); }
2365 ;
2366
2367 extension:
2368 EXTENSION
2369 { $<itype>$ = pedantic;
2370 pedantic = 0; }
2371 ;
2372 \f
2373 ifobjc
2374 /* Objective-C productions. */
2375
2376 objcdef:
2377 classdef
2378 | classdecl
2379 | aliasdecl
2380 | protocoldef
2381 | methoddef
2382 | END
2383 {
2384 if (objc_implementation_context)
2385 {
2386 finish_class (objc_implementation_context);
2387 objc_ivar_chain = NULL_TREE;
2388 objc_implementation_context = NULL_TREE;
2389 }
2390 else
2391 warning ("`@end' must appear in an implementation context");
2392 }
2393 ;
2394
2395 /* A nonempty list of identifiers. */
2396 identifier_list:
2397 identifier
2398 { $$ = build_tree_list (NULL_TREE, $1); }
2399 | identifier_list ',' identifier
2400 { $$ = chainon ($1, build_tree_list (NULL_TREE, $3)); }
2401 ;
2402
2403 classdecl:
2404 CLASS identifier_list ';'
2405 {
2406 objc_declare_class ($2);
2407 }
2408
2409 aliasdecl:
2410 ALIAS identifier identifier ';'
2411 {
2412 objc_declare_alias ($2, $3);
2413 }
2414
2415 classdef:
2416 INTERFACE identifier protocolrefs '{'
2417 {
2418 objc_interface_context = objc_ivar_context
2419 = start_class (CLASS_INTERFACE_TYPE, $2, NULL_TREE, $3);
2420 objc_public_flag = 0;
2421 }
2422 ivar_decl_list '}'
2423 {
2424 continue_class (objc_interface_context);
2425 }
2426 methodprotolist
2427 END
2428 {
2429 finish_class (objc_interface_context);
2430 objc_interface_context = NULL_TREE;
2431 }
2432
2433 | INTERFACE identifier protocolrefs
2434 {
2435 objc_interface_context
2436 = start_class (CLASS_INTERFACE_TYPE, $2, NULL_TREE, $3);
2437 continue_class (objc_interface_context);
2438 }
2439 methodprotolist
2440 END
2441 {
2442 finish_class (objc_interface_context);
2443 objc_interface_context = NULL_TREE;
2444 }
2445
2446 | INTERFACE identifier ':' identifier protocolrefs '{'
2447 {
2448 objc_interface_context = objc_ivar_context
2449 = start_class (CLASS_INTERFACE_TYPE, $2, $4, $5);
2450 objc_public_flag = 0;
2451 }
2452 ivar_decl_list '}'
2453 {
2454 continue_class (objc_interface_context);
2455 }
2456 methodprotolist
2457 END
2458 {
2459 finish_class (objc_interface_context);
2460 objc_interface_context = NULL_TREE;
2461 }
2462
2463 | INTERFACE identifier ':' identifier protocolrefs
2464 {
2465 objc_interface_context
2466 = start_class (CLASS_INTERFACE_TYPE, $2, $4, $5);
2467 continue_class (objc_interface_context);
2468 }
2469 methodprotolist
2470 END
2471 {
2472 finish_class (objc_interface_context);
2473 objc_interface_context = NULL_TREE;
2474 }
2475
2476 | IMPLEMENTATION identifier '{'
2477 {
2478 objc_implementation_context = objc_ivar_context
2479 = start_class (CLASS_IMPLEMENTATION_TYPE, $2, NULL_TREE, NULL_TREE);
2480 objc_public_flag = 0;
2481 }
2482 ivar_decl_list '}'
2483 {
2484 objc_ivar_chain
2485 = continue_class (objc_implementation_context);
2486 }
2487
2488 | IMPLEMENTATION identifier
2489 {
2490 objc_implementation_context
2491 = start_class (CLASS_IMPLEMENTATION_TYPE, $2, NULL_TREE, NULL_TREE);
2492 objc_ivar_chain
2493 = continue_class (objc_implementation_context);
2494 }
2495
2496 | IMPLEMENTATION identifier ':' identifier '{'
2497 {
2498 objc_implementation_context = objc_ivar_context
2499 = start_class (CLASS_IMPLEMENTATION_TYPE, $2, $4, NULL_TREE);
2500 objc_public_flag = 0;
2501 }
2502 ivar_decl_list '}'
2503 {
2504 objc_ivar_chain
2505 = continue_class (objc_implementation_context);
2506 }
2507
2508 | IMPLEMENTATION identifier ':' identifier
2509 {
2510 objc_implementation_context
2511 = start_class (CLASS_IMPLEMENTATION_TYPE, $2, $4, NULL_TREE);
2512 objc_ivar_chain
2513 = continue_class (objc_implementation_context);
2514 }
2515
2516 | INTERFACE identifier '(' identifier ')' protocolrefs
2517 {
2518 objc_interface_context
2519 = start_class (CATEGORY_INTERFACE_TYPE, $2, $4, $6);
2520 continue_class (objc_interface_context);
2521 }
2522 methodprotolist
2523 END
2524 {
2525 finish_class (objc_interface_context);
2526 objc_interface_context = NULL_TREE;
2527 }
2528
2529 | IMPLEMENTATION identifier '(' identifier ')'
2530 {
2531 objc_implementation_context
2532 = start_class (CATEGORY_IMPLEMENTATION_TYPE, $2, $4, NULL_TREE);
2533 objc_ivar_chain
2534 = continue_class (objc_implementation_context);
2535 }
2536 ;
2537
2538 protocoldef:
2539 PROTOCOL identifier protocolrefs
2540 {
2541 remember_protocol_qualifiers ();
2542 objc_interface_context
2543 = start_protocol(PROTOCOL_INTERFACE_TYPE, $2, $3);
2544 }
2545 methodprotolist END
2546 {
2547 forget_protocol_qualifiers();
2548 finish_protocol(objc_interface_context);
2549 objc_interface_context = NULL_TREE;
2550 }
2551 ;
2552
2553 protocolrefs:
2554 /* empty */
2555 {
2556 $$ = NULL_TREE;
2557 }
2558 | non_empty_protocolrefs
2559 ;
2560
2561 non_empty_protocolrefs:
2562 ARITHCOMPARE identifier_list ARITHCOMPARE
2563 {
2564 if ($1 == LT_EXPR && $3 == GT_EXPR)
2565 $$ = $2;
2566 else
2567 YYERROR1;
2568 }
2569 ;
2570
2571 ivar_decl_list:
2572 ivar_decl_list visibility_spec ivar_decls
2573 | ivar_decls
2574 ;
2575
2576 visibility_spec:
2577 PRIVATE { objc_public_flag = 2; }
2578 | PROTECTED { objc_public_flag = 0; }
2579 | PUBLIC { objc_public_flag = 1; }
2580 ;
2581
2582 ivar_decls:
2583 /* empty */
2584 {
2585 $$ = NULL_TREE;
2586 }
2587 | ivar_decls ivar_decl ';'
2588 | ivar_decls ';'
2589 {
2590 if (pedantic)
2591 pedwarn ("extra semicolon in struct or union specified");
2592 }
2593 ;
2594
2595
2596 /* There is a shift-reduce conflict here, because `components' may
2597 start with a `typename'. It happens that shifting (the default resolution)
2598 does the right thing, because it treats the `typename' as part of
2599 a `typed_typespecs'.
2600
2601 It is possible that this same technique would allow the distinction
2602 between `notype_initdecls' and `initdecls' to be eliminated.
2603 But I am being cautious and not trying it. */
2604
2605 ivar_decl:
2606 typed_typespecs setspecs ivars
2607 { $$ = $3;
2608 current_declspecs = TREE_VALUE (declspec_stack);
2609 prefix_attributes = TREE_PURPOSE (declspec_stack);
2610 declspec_stack = TREE_CHAIN (declspec_stack);
2611 resume_momentary ($2); }
2612 | nonempty_type_quals setspecs ivars
2613 { $$ = $3;
2614 current_declspecs = TREE_VALUE (declspec_stack);
2615 prefix_attributes = TREE_PURPOSE (declspec_stack);
2616 declspec_stack = TREE_CHAIN (declspec_stack);
2617 resume_momentary ($2); }
2618 | error
2619 { $$ = NULL_TREE; }
2620 ;
2621
2622 ivars:
2623 /* empty */
2624 { $$ = NULL_TREE; }
2625 | ivar_declarator
2626 | ivars ',' ivar_declarator
2627 ;
2628
2629 ivar_declarator:
2630 declarator
2631 {
2632 $$ = add_instance_variable (objc_ivar_context,
2633 objc_public_flag,
2634 $1, current_declspecs,
2635 NULL_TREE);
2636 }
2637 | declarator ':' expr_no_commas
2638 {
2639 $$ = add_instance_variable (objc_ivar_context,
2640 objc_public_flag,
2641 $1, current_declspecs, $3);
2642 }
2643 | ':' expr_no_commas
2644 {
2645 $$ = add_instance_variable (objc_ivar_context,
2646 objc_public_flag,
2647 NULL_TREE,
2648 current_declspecs, $2);
2649 }
2650 ;
2651
2652 methoddef:
2653 '+'
2654 {
2655 remember_protocol_qualifiers ();
2656 if (objc_implementation_context)
2657 objc_inherit_code = CLASS_METHOD_DECL;
2658 else
2659 fatal ("method definition not in class context");
2660 }
2661 methoddecl
2662 {
2663 forget_protocol_qualifiers ();
2664 add_class_method (objc_implementation_context, $3);
2665 start_method_def ($3);
2666 objc_method_context = $3;
2667 }
2668 optarglist
2669 {
2670 continue_method_def ();
2671 }
2672 compstmt_or_error
2673 {
2674 finish_method_def ();
2675 objc_method_context = NULL_TREE;
2676 }
2677
2678 | '-'
2679 {
2680 remember_protocol_qualifiers ();
2681 if (objc_implementation_context)
2682 objc_inherit_code = INSTANCE_METHOD_DECL;
2683 else
2684 fatal ("method definition not in class context");
2685 }
2686 methoddecl
2687 {
2688 forget_protocol_qualifiers ();
2689 add_instance_method (objc_implementation_context, $3);
2690 start_method_def ($3);
2691 objc_method_context = $3;
2692 }
2693 optarglist
2694 {
2695 continue_method_def ();
2696 }
2697 compstmt_or_error
2698 {
2699 finish_method_def ();
2700 objc_method_context = NULL_TREE;
2701 }
2702 ;
2703
2704 /* the reason for the strange actions in this rule
2705 is so that notype_initdecls when reached via datadef
2706 can find a valid list of type and sc specs in $0. */
2707
2708 methodprotolist:
2709 /* empty */
2710 | {$<ttype>$ = NULL_TREE; } methodprotolist2
2711 ;
2712
2713 methodprotolist2: /* eliminates a shift/reduce conflict */
2714 methodproto
2715 | datadef
2716 | methodprotolist2 methodproto
2717 | methodprotolist2 {$<ttype>$ = NULL_TREE; } datadef
2718 ;
2719
2720 semi_or_error:
2721 ';'
2722 | error
2723 ;
2724
2725 methodproto:
2726 '+'
2727 {
2728 /* Remember protocol qualifiers in prototypes. */
2729 remember_protocol_qualifiers ();
2730 objc_inherit_code = CLASS_METHOD_DECL;
2731 }
2732 methoddecl
2733 {
2734 /* Forget protocol qualifiers here. */
2735 forget_protocol_qualifiers ();
2736 add_class_method (objc_interface_context, $3);
2737 }
2738 semi_or_error
2739
2740 | '-'
2741 {
2742 /* Remember protocol qualifiers in prototypes. */
2743 remember_protocol_qualifiers ();
2744 objc_inherit_code = INSTANCE_METHOD_DECL;
2745 }
2746 methoddecl
2747 {
2748 /* Forget protocol qualifiers here. */
2749 forget_protocol_qualifiers ();
2750 add_instance_method (objc_interface_context, $3);
2751 }
2752 semi_or_error
2753 ;
2754
2755 methoddecl:
2756 '(' typename ')' unaryselector
2757 {
2758 $$ = build_method_decl (objc_inherit_code, $2, $4, NULL_TREE);
2759 }
2760
2761 | unaryselector
2762 {
2763 $$ = build_method_decl (objc_inherit_code, NULL_TREE, $1, NULL_TREE);
2764 }
2765
2766 | '(' typename ')' keywordselector optparmlist
2767 {
2768 $$ = build_method_decl (objc_inherit_code, $2, $4, $5);
2769 }
2770
2771 | keywordselector optparmlist
2772 {
2773 $$ = build_method_decl (objc_inherit_code, NULL_TREE, $1, $2);
2774 }
2775 ;
2776
2777 /* "optarglist" assumes that start_method_def has already been called...
2778 if it is not, the "xdecls" will not be placed in the proper scope */
2779
2780 optarglist:
2781 /* empty */
2782 | ';' myxdecls
2783 ;
2784
2785 /* to get around the following situation: "int foo (int a) int b; {}" that
2786 is synthesized when parsing "- a:a b:b; id c; id d; { ... }" */
2787
2788 myxdecls:
2789 /* empty */
2790 | mydecls
2791 ;
2792
2793 mydecls:
2794 mydecl
2795 | errstmt
2796 | mydecls mydecl
2797 | mydecl errstmt
2798 ;
2799
2800 mydecl:
2801 typed_declspecs setspecs myparms ';'
2802 { current_declspecs = TREE_VALUE (declspec_stack);
2803 prefix_attributes = TREE_PURPOSE (declspec_stack);
2804 declspec_stack = TREE_CHAIN (declspec_stack);
2805 resume_momentary ($2); }
2806 | typed_declspecs ';'
2807 { shadow_tag ($1); }
2808 | declmods ';'
2809 { pedwarn ("empty declaration"); }
2810 ;
2811
2812 myparms:
2813 myparm
2814 { push_parm_decl ($1); }
2815 | myparms ',' myparm
2816 { push_parm_decl ($3); }
2817 ;
2818
2819 /* A single parameter declaration or parameter type name,
2820 as found in a parmlist. DOES NOT ALLOW AN INITIALIZER OR ASMSPEC */
2821
2822 myparm:
2823 parm_declarator maybe_attribute
2824 { $$ = build_tree_list (build_tree_list (current_declspecs,
2825 $1),
2826 build_tree_list (prefix_attributes,
2827 $2)); }
2828 | notype_declarator maybe_attribute
2829 { $$ = build_tree_list (build_tree_list (current_declspecs,
2830 $1),
2831 build_tree_list (prefix_attributes,
2832 $2)); }
2833 | absdcl maybe_attribute
2834 { $$ = build_tree_list (build_tree_list (current_declspecs,
2835 $1),
2836 build_tree_list (prefix_attributes,
2837 $2)); }
2838 ;
2839
2840 optparmlist:
2841 /* empty */
2842 {
2843 $$ = NULL_TREE;
2844 }
2845 | ',' ELLIPSIS
2846 {
2847 /* oh what a kludge! */
2848 $$ = (tree)1;
2849 }
2850 | ','
2851 {
2852 pushlevel (0);
2853 }
2854 parmlist_2
2855 {
2856 /* returns a tree list node generated by get_parm_info */
2857 $$ = $3;
2858 poplevel (0, 0, 0);
2859 }
2860 ;
2861
2862 unaryselector:
2863 selector
2864 ;
2865
2866 keywordselector:
2867 keyworddecl
2868
2869 | keywordselector keyworddecl
2870 {
2871 $$ = chainon ($1, $2);
2872 }
2873 ;
2874
2875 selector:
2876 IDENTIFIER
2877 | TYPENAME
2878 | OBJECTNAME
2879 | reservedwords
2880 ;
2881
2882 reservedwords:
2883 ENUM { $$ = get_identifier (token_buffer); }
2884 | STRUCT { $$ = get_identifier (token_buffer); }
2885 | UNION { $$ = get_identifier (token_buffer); }
2886 | IF { $$ = get_identifier (token_buffer); }
2887 | ELSE { $$ = get_identifier (token_buffer); }
2888 | WHILE { $$ = get_identifier (token_buffer); }
2889 | DO { $$ = get_identifier (token_buffer); }
2890 | FOR { $$ = get_identifier (token_buffer); }
2891 | SWITCH { $$ = get_identifier (token_buffer); }
2892 | CASE { $$ = get_identifier (token_buffer); }
2893 | DEFAULT { $$ = get_identifier (token_buffer); }
2894 | BREAK { $$ = get_identifier (token_buffer); }
2895 | CONTINUE { $$ = get_identifier (token_buffer); }
2896 | RETURN { $$ = get_identifier (token_buffer); }
2897 | GOTO { $$ = get_identifier (token_buffer); }
2898 | ASM_KEYWORD { $$ = get_identifier (token_buffer); }
2899 | SIZEOF { $$ = get_identifier (token_buffer); }
2900 | TYPEOF { $$ = get_identifier (token_buffer); }
2901 | ALIGNOF { $$ = get_identifier (token_buffer); }
2902 | TYPESPEC | TYPE_QUAL
2903 ;
2904
2905 keyworddecl:
2906 selector ':' '(' typename ')' identifier
2907 {
2908 $$ = build_keyword_decl ($1, $4, $6);
2909 }
2910
2911 | selector ':' identifier
2912 {
2913 $$ = build_keyword_decl ($1, NULL_TREE, $3);
2914 }
2915
2916 | ':' '(' typename ')' identifier
2917 {
2918 $$ = build_keyword_decl (NULL_TREE, $3, $5);
2919 }
2920
2921 | ':' identifier
2922 {
2923 $$ = build_keyword_decl (NULL_TREE, NULL_TREE, $2);
2924 }
2925 ;
2926
2927 messageargs:
2928 selector
2929 | keywordarglist
2930 ;
2931
2932 keywordarglist:
2933 keywordarg
2934 | keywordarglist keywordarg
2935 {
2936 $$ = chainon ($1, $2);
2937 }
2938 ;
2939
2940
2941 keywordexpr:
2942 nonnull_exprlist
2943 {
2944 if (TREE_CHAIN ($1) == NULL_TREE)
2945 /* just return the expr., remove a level of indirection */
2946 $$ = TREE_VALUE ($1);
2947 else
2948 /* we have a comma expr., we will collapse later */
2949 $$ = $1;
2950 }
2951 ;
2952
2953 keywordarg:
2954 selector ':' keywordexpr
2955 {
2956 $$ = build_tree_list ($1, $3);
2957 }
2958 | ':' keywordexpr
2959 {
2960 $$ = build_tree_list (NULL_TREE, $2);
2961 }
2962 ;
2963
2964 receiver:
2965 expr
2966 | CLASSNAME
2967 {
2968 $$ = get_class_reference ($1);
2969 }
2970 ;
2971
2972 objcmessageexpr:
2973 '['
2974 { objc_receiver_context = 1; }
2975 receiver
2976 { objc_receiver_context = 0; }
2977 messageargs ']'
2978 {
2979 $$ = build_tree_list ($3, $5);
2980 }
2981 ;
2982
2983 selectorarg:
2984 selector
2985 | keywordnamelist
2986 ;
2987
2988 keywordnamelist:
2989 keywordname
2990 | keywordnamelist keywordname
2991 {
2992 $$ = chainon ($1, $2);
2993 }
2994 ;
2995
2996 keywordname:
2997 selector ':'
2998 {
2999 $$ = build_tree_list ($1, NULL_TREE);
3000 }
3001 | ':'
3002 {
3003 $$ = build_tree_list (NULL_TREE, NULL_TREE);
3004 }
3005 ;
3006
3007 objcselectorexpr:
3008 SELECTOR '(' selectorarg ')'
3009 {
3010 $$ = $3;
3011 }
3012 ;
3013
3014 objcprotocolexpr:
3015 PROTOCOL '(' identifier ')'
3016 {
3017 $$ = $3;
3018 }
3019 ;
3020
3021 /* extension to support C-structures in the archiver */
3022
3023 objcencodeexpr:
3024 ENCODE '(' typename ')'
3025 {
3026 $$ = groktypename ($3);
3027 }
3028 ;
3029
3030 end ifobjc
3031 %%