?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
* cp-tree.h (DECL_LOCAL_FUCNTION_P): New macro.
[official-gcc.git] / gcc / c-parse.y
blob0e0b36bc30e7c178eeaea47f56a8b305db4de2af
1 /*WARNING: This file is automatically generated!*/
2 /* YACC parser for C syntax and for Objective C. -*-c-*-
3 Copyright (C) 1987, 88, 89, 92-98, 1999 Free Software Foundation, Inc.
4
5 This file is part of GNU CC.
6
7 GNU CC is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2, or (at your option)
10 any later version.
11
12 GNU CC is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with GNU CC; see the file COPYING. If not, write to
19 the Free Software Foundation, 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
21
22 /* This file defines the grammar of C and that of Objective C.
23 ifobjc ... end ifobjc conditionals contain code for Objective C only.
24 ifc ... end ifc conditionals contain code for C only.
25 Sed commands in Makefile.in are used to convert this file into
26 c-parse.y and into objc-parse.y. */
27
28 /* To whomever it may concern: I have heard that such a thing was once
29 written by AT&T, but I have never seen it. */
30
31 %expect 53
32
33 %{
34 #include "config.h"
35 #include "system.h"
36 #include <setjmp.h>
37 #include "tree.h"
38 #include "input.h"
39 #include "c-lex.h"
40 #include "c-tree.h"
41 #include "flags.h"
42 #include "output.h"
43 #include "toplev.h"
44 #include "ggc.h"
45
46 #ifdef MULTIBYTE_CHARS
47 #include <locale.h>
48 #endif
49
50
51 /* Since parsers are distinct for each language, put the language string
52 definition here. */
53 const char * const language_string = "GNU C";
54
55 /* Like YYERROR but do call yyerror. */
56 #define YYERROR1 { yyerror ("syntax error"); YYERROR; }
57
58 /* Cause the `yydebug' variable to be defined. */
59 #define YYDEBUG 1
60 %}
61
62 %start program
63
64 %union {long itype; tree ttype; enum tree_code code;
65 char *filename; int lineno; int ends_in_label; }
66
67 /* All identifiers that are not reserved words
68 and are not declared typedefs in the current block */
69 %token IDENTIFIER
70
71 /* All identifiers that are declared typedefs in the current block.
72 In some contexts, they are treated just like IDENTIFIER,
73 but they can also serve as typespecs in declarations. */
74 %token TYPENAME
75
76 /* Reserved words that specify storage class.
77 yylval contains an IDENTIFIER_NODE which indicates which one. */
78 %token SCSPEC
79
80 /* Reserved words that specify type.
81 yylval contains an IDENTIFIER_NODE which indicates which one. */
82 %token TYPESPEC
83
84 /* Reserved words that qualify type: "const", "volatile", or "restrict".
85 yylval contains an IDENTIFIER_NODE which indicates which one. */
86 %token TYPE_QUAL
87
88 /* Character or numeric constants.
89 yylval is the node for the constant. */
90 %token CONSTANT
91
92 /* String constants in raw form.
93 yylval is a STRING_CST node. */
94 %token STRING
95
96 /* "...", used for functions with variable arglists. */
97 %token ELLIPSIS
98
99 /* the reserved words */
100 /* SCO include files test "ASM", so use something else. */
101 %token SIZEOF ENUM STRUCT UNION IF ELSE WHILE DO FOR SWITCH CASE DEFAULT
102 %token BREAK CONTINUE RETURN GOTO ASM_KEYWORD TYPEOF ALIGNOF
103 %token ATTRIBUTE EXTENSION LABEL
104 %token REALPART IMAGPART VA_ARG
105
106 /* Used in c-lex.c for parsing pragmas. */
107 %token END_OF_LINE
108
109 /* Add precedence rules to solve dangling else s/r conflict */
110 %nonassoc IF
111 %nonassoc ELSE
112
113 /* Define the operator tokens and their precedences.
114 The value is an integer because, if used, it is the tree code
115 to use in the expression made from the operator. */
116
117 %right <code> ASSIGN '='
118 %right <code> '?' ':'
119 %left <code> OROR
120 %left <code> ANDAND
121 %left <code> '|'
122 %left <code> '^'
123 %left <code> '&'
124 %left <code> EQCOMPARE
125 %left <code> ARITHCOMPARE
126 %left <code> LSHIFT RSHIFT
127 %left <code> '+' '-'
128 %left <code> '*' '/' '%'
129 %right <code> UNARY PLUSPLUS MINUSMINUS
130 %left HYPERUNARY
131 %left <code> POINTSAT '.' '(' '['
132
133 /* The Objective-C keywords. These are included in C and in
134 Objective C, so that the token codes are the same in both. */
135 %token INTERFACE IMPLEMENTATION END SELECTOR DEFS ENCODE
136 %token CLASSNAME PUBLIC PRIVATE PROTECTED PROTOCOL OBJECTNAME CLASS ALIAS
137
138 /* Objective-C string constants in raw form.
139 yylval is an OBJC_STRING_CST node. */
140 %token OBJC_STRING
141
142
143 %type <code> unop
144
145 %type <ttype> identifier IDENTIFIER TYPENAME CONSTANT expr nonnull_exprlist exprlist
146 %type <ttype> expr_no_commas cast_expr unary_expr primary string STRING
147 %type <ttype> typed_declspecs reserved_declspecs
148 %type <ttype> typed_typespecs reserved_typespecquals
149 %type <ttype> declmods typespec typespecqual_reserved
150 %type <ttype> typed_declspecs_no_prefix_attr reserved_declspecs_no_prefix_attr
151 %type <ttype> declmods_no_prefix_attr
152 %type <ttype> SCSPEC TYPESPEC TYPE_QUAL nonempty_type_quals maybe_type_qual
153 %type <ttype> initdecls notype_initdecls initdcl notype_initdcl
154 %type <ttype> init maybeasm
155 %type <ttype> asm_operands nonnull_asm_operands asm_operand asm_clobbers
156 %type <ttype> maybe_attribute attributes attribute attribute_list attrib
157 %type <ttype> any_word
158
159 %type <ttype> compstmt compstmt_nostart compstmt_primary_start
160
161 %type <ttype> declarator
162 %type <ttype> notype_declarator after_type_declarator
163 %type <ttype> parm_declarator
164
165 %type <ttype> structsp component_decl_list component_decl_list2
166 %type <ttype> component_decl components component_declarator
167 %type <ttype> enumlist enumerator
168 %type <ttype> struct_head union_head enum_head
169 %type <ttype> typename absdcl absdcl1 type_quals
170 %type <ttype> xexpr parms parm identifiers
171
172 %type <ttype> parmlist parmlist_1 parmlist_2
173 %type <ttype> parmlist_or_identifiers parmlist_or_identifiers_1
174 %type <ttype> identifiers_or_typenames
175
176 %type <itype> extension
177
178 %type <itype> setspecs
179
180 %type <ends_in_label> lineno_stmt_or_label lineno_stmt_or_labels stmt_or_label
181
182 %type <filename> save_filename
183 %type <lineno> save_lineno
184 \f
185 \f
186 %{
187 /* Number of statements (loosely speaking) and compound statements
188 seen so far. */
189 static int stmt_count;
190 static int compstmt_count;
191
192 /* Input file and line number of the end of the body of last simple_if;
193 used by the stmt-rule immediately after simple_if returns. */
194 static char *if_stmt_file;
195 static int if_stmt_line;
196
197 /* List of types and structure classes of the current declaration. */
198 static tree current_declspecs = NULL_TREE;
199 static tree prefix_attributes = NULL_TREE;
200
201 /* Stack of saved values of current_declspecs and prefix_attributes. */
202 static tree declspec_stack;
203
204 /* 1 if we explained undeclared var errors. */
205 static int undeclared_variable_notice;
206
207 /* For __extension__, save/restore the warning flags which are
208 controlled by __extension__. */
209 #define SAVE_WARN_FLAGS() (pedantic | (warn_pointer_arith << 1))
210 #define RESTORE_WARN_FLAGS(val) \
211 do { \
212 pedantic = val & 1; \
213 warn_pointer_arith = (val >> 1) & 1; \
214 } while (0)
215
216
217 /* Tell yyparse how to print a token's value, if yydebug is set. */
218
219 #define YYPRINT(FILE,YYCHAR,YYLVAL) yyprint(FILE,YYCHAR,YYLVAL)
220 extern void yyprint PROTO ((FILE *, int, YYSTYPE));
221
222 /* Add GC roots for variables local to this file. */
223 void
224 c_parse_init ()
225 {
226 ggc_add_tree_root (&declspec_stack, 1);
227 ggc_add_tree_root (&current_declspecs, 1);
228 ggc_add_tree_root (&prefix_attributes, 1);
229 }
230
231 %}
232 \f
233 %%
234 program: /* empty */
235 { if (pedantic)
236 pedwarn ("ANSI C forbids an empty source file");
237 finish_file ();
238 }
239 | extdefs
240 {
241 /* In case there were missing closebraces,
242 get us back to the global binding level. */
243 while (! global_bindings_p ())
244 poplevel (0, 0, 0);
245 finish_file ();
246 }
247 ;
248
249 /* the reason for the strange actions in this rule
250 is so that notype_initdecls when reached via datadef
251 can find a valid list of type and sc specs in $0. */
252
253 extdefs:
254 {$<ttype>$ = NULL_TREE; } extdef
255 | extdefs {$<ttype>$ = NULL_TREE; } extdef
256 ;
257
258 extdef:
259 fndef
260 | datadef
261 | ASM_KEYWORD '(' expr ')' ';'
262 { STRIP_NOPS ($3);
263 if ((TREE_CODE ($3) == ADDR_EXPR
264 && TREE_CODE (TREE_OPERAND ($3, 0)) == STRING_CST)
265 || TREE_CODE ($3) == STRING_CST)
266 assemble_asm ($3);
267 else
268 error ("argument of `asm' is not a constant string"); }
269 | extension extdef
270 { RESTORE_WARN_FLAGS ($1); }
271 ;
272
273 datadef:
274 setspecs notype_initdecls ';'
275 { if (pedantic)
276 error ("ANSI C forbids data definition with no type or storage class");
277 else if (!flag_traditional)
278 warning ("data definition has no type or storage class");
279
280 current_declspecs = TREE_VALUE (declspec_stack);
281 prefix_attributes = TREE_PURPOSE (declspec_stack);
282 declspec_stack = TREE_CHAIN (declspec_stack);
283 resume_momentary ($1); }
284 | declmods setspecs notype_initdecls ';'
285 { current_declspecs = TREE_VALUE (declspec_stack);
286 prefix_attributes = TREE_PURPOSE (declspec_stack);
287 declspec_stack = TREE_CHAIN (declspec_stack);
288 resume_momentary ($2); }
289 | typed_declspecs setspecs initdecls ';'
290 { current_declspecs = TREE_VALUE (declspec_stack);
291 prefix_attributes = TREE_PURPOSE (declspec_stack);
292 declspec_stack = TREE_CHAIN (declspec_stack);
293 resume_momentary ($2); }
294 | declmods ';'
295 { pedwarn ("empty declaration"); }
296 | typed_declspecs ';'
297 { shadow_tag ($1); }
298 | error ';'
299 | error '}'
300 | ';'
301 { if (pedantic)
302 pedwarn ("ANSI C does not allow extra `;' outside of a function"); }
303 ;
304 \f
305 fndef:
306 typed_declspecs setspecs declarator
307 { if (! start_function (current_declspecs, $3,
308 prefix_attributes, NULL_TREE, 0))
309 YYERROR1;
310 reinit_parse_for_function (); }
311 old_style_parm_decls
312 { store_parm_decls (); }
313 compstmt_or_error
314 { finish_function (0);
315 current_declspecs = TREE_VALUE (declspec_stack);
316 prefix_attributes = TREE_PURPOSE (declspec_stack);
317 declspec_stack = TREE_CHAIN (declspec_stack);
318 resume_momentary ($2); }
319 | typed_declspecs setspecs declarator error
320 { current_declspecs = TREE_VALUE (declspec_stack);
321 prefix_attributes = TREE_PURPOSE (declspec_stack);
322 declspec_stack = TREE_CHAIN (declspec_stack);
323 resume_momentary ($2); }
324 | declmods setspecs notype_declarator
325 { if (! start_function (current_declspecs, $3,
326 prefix_attributes, NULL_TREE, 0))
327 YYERROR1;
328 reinit_parse_for_function (); }
329 old_style_parm_decls
330 { store_parm_decls (); }
331 compstmt_or_error
332 { finish_function (0);
333 current_declspecs = TREE_VALUE (declspec_stack);
334 prefix_attributes = TREE_PURPOSE (declspec_stack);
335 declspec_stack = TREE_CHAIN (declspec_stack);
336 resume_momentary ($2); }
337 | declmods setspecs notype_declarator error
338 { current_declspecs = TREE_VALUE (declspec_stack);
339 prefix_attributes = TREE_PURPOSE (declspec_stack);
340 declspec_stack = TREE_CHAIN (declspec_stack);
341 resume_momentary ($2); }
342 | setspecs notype_declarator
343 { if (! start_function (NULL_TREE, $2,
344 prefix_attributes, NULL_TREE, 0))
345 YYERROR1;
346 reinit_parse_for_function (); }
347 old_style_parm_decls
348 { store_parm_decls (); }
349 compstmt_or_error
350 { finish_function (0);
351 current_declspecs = TREE_VALUE (declspec_stack);
352 prefix_attributes = TREE_PURPOSE (declspec_stack);
353 declspec_stack = TREE_CHAIN (declspec_stack);
354 resume_momentary ($1); }
355 | setspecs notype_declarator error
356 { current_declspecs = TREE_VALUE (declspec_stack);
357 prefix_attributes = TREE_PURPOSE (declspec_stack);
358 declspec_stack = TREE_CHAIN (declspec_stack);
359 resume_momentary ($1); }
360 ;
361
362 identifier:
363 IDENTIFIER
364 | TYPENAME
365 ;
366
367 unop: '&'
368 { $$ = ADDR_EXPR; }
369 | '-'
370 { $$ = NEGATE_EXPR; }
371 | '+'
372 { $$ = CONVERT_EXPR; }
373 | PLUSPLUS
374 { $$ = PREINCREMENT_EXPR; }
375 | MINUSMINUS
376 { $$ = PREDECREMENT_EXPR; }
377 | '~'
378 { $$ = BIT_NOT_EXPR; }
379 | '!'
380 { $$ = TRUTH_NOT_EXPR; }
381 ;
382
383 expr: nonnull_exprlist
384 { $$ = build_compound_expr ($1); }
385 ;
386
387 exprlist:
388 /* empty */
389 { $$ = NULL_TREE; }
390 | nonnull_exprlist
391 ;
392
393 nonnull_exprlist:
394 expr_no_commas
395 { $$ = build_tree_list (NULL_TREE, $1); }
396 | nonnull_exprlist ',' expr_no_commas
397 { chainon ($1, build_tree_list (NULL_TREE, $3)); }
398 ;
399
400 unary_expr:
401 primary
402 | '*' cast_expr %prec UNARY
403 { $$ = build_indirect_ref ($2, "unary *"); }
404 /* __extension__ turns off -pedantic for following primary. */
405 | extension cast_expr %prec UNARY
406 { $$ = $2;
407 RESTORE_WARN_FLAGS ($1); }
408 | unop cast_expr %prec UNARY
409 { $$ = build_unary_op ($1, $2, 0);
410 overflow_warning ($$); }
411 /* Refer to the address of a label as a pointer. */
412 | ANDAND identifier
413 { tree label = lookup_label ($2);
414 if (pedantic)
415 pedwarn ("ANSI C forbids `&&'");
416 if (label == 0)
417 $$ = null_pointer_node;
418 else
419 {
420 TREE_USED (label) = 1;
421 $$ = build1 (ADDR_EXPR, ptr_type_node, label);
422 TREE_CONSTANT ($$) = 1;
423 }
424 }
425 /* This seems to be impossible on some machines, so let's turn it off.
426 You can use __builtin_next_arg to find the anonymous stack args.
427 | '&' ELLIPSIS
428 { tree types = TYPE_ARG_TYPES (TREE_TYPE (current_function_decl));
429 $$ = error_mark_node;
430 if (TREE_VALUE (tree_last (types)) == void_type_node)
431 error ("`&...' used in function with fixed number of arguments");
432 else
433 {
434 if (pedantic)
435 pedwarn ("ANSI C forbids `&...'");
436 $$ = tree_last (DECL_ARGUMENTS (current_function_decl));
437 $$ = build_unary_op (ADDR_EXPR, $$, 0);
438 } }
439 */
440 | sizeof unary_expr %prec UNARY
441 { skip_evaluation--;
442 if (TREE_CODE ($2) == COMPONENT_REF
443 && DECL_C_BIT_FIELD (TREE_OPERAND ($2, 1)))
444 error ("`sizeof' applied to a bit-field");
445 $$ = c_sizeof (TREE_TYPE ($2)); }
446 | sizeof '(' typename ')' %prec HYPERUNARY
447 { skip_evaluation--;
448 $$ = c_sizeof (groktypename ($3)); }
449 | alignof unary_expr %prec UNARY
450 { skip_evaluation--;
451 $$ = c_alignof_expr ($2); }
452 | alignof '(' typename ')' %prec HYPERUNARY
453 { skip_evaluation--;
454 $$ = c_alignof (groktypename ($3)); }
455 | REALPART cast_expr %prec UNARY
456 { $$ = build_unary_op (REALPART_EXPR, $2, 0); }
457 | IMAGPART cast_expr %prec UNARY
458 { $$ = build_unary_op (IMAGPART_EXPR, $2, 0); }
459 | VA_ARG '(' expr_no_commas ',' typename ')'
460 { $$ = build_va_arg ($3, groktypename ($5)); }
461 ;
462
463 sizeof:
464 SIZEOF { skip_evaluation++; }
465 ;
466
467 alignof:
468 ALIGNOF { skip_evaluation++; }
469 ;
470
471 cast_expr:
472 unary_expr
473 | '(' typename ')' cast_expr %prec UNARY
474 { tree type = groktypename ($2);
475 $$ = build_c_cast (type, $4); }
476 | '(' typename ')' '{'
477 { start_init (NULL_TREE, NULL, 0);
478 $2 = groktypename ($2);
479 really_start_incremental_init ($2); }
480 initlist_maybe_comma '}' %prec UNARY
481 { const char *name;
482 tree result = pop_init_level (0);
483 tree type = $2;
484 finish_init ();
485
486 if (pedantic && ! flag_isoc9x)
487 pedwarn ("ANSI C forbids constructor expressions");
488 if (TYPE_NAME (type) != 0)
489 {
490 if (TREE_CODE (TYPE_NAME (type)) == IDENTIFIER_NODE)
491 name = IDENTIFIER_POINTER (TYPE_NAME (type));
492 else
493 name = IDENTIFIER_POINTER (DECL_NAME (TYPE_NAME (type)));
494 }
495 else
496 name = "";
497 $$ = result;
498 if (TREE_CODE (type) == ARRAY_TYPE && TYPE_SIZE (type) == 0)
499 {
500 int failure = complete_array_type (type, $$, 1);
501 if (failure)
502 abort ();
503 }
504 }
505 ;
506
507 expr_no_commas:
508 cast_expr
509 | expr_no_commas '+' expr_no_commas
510 { $$ = parser_build_binary_op ($2, $1, $3); }
511 | expr_no_commas '-' expr_no_commas
512 { $$ = parser_build_binary_op ($2, $1, $3); }
513 | expr_no_commas '*' expr_no_commas
514 { $$ = parser_build_binary_op ($2, $1, $3); }
515 | expr_no_commas '/' expr_no_commas
516 { $$ = parser_build_binary_op ($2, $1, $3); }
517 | expr_no_commas '%' expr_no_commas
518 { $$ = parser_build_binary_op ($2, $1, $3); }
519 | expr_no_commas LSHIFT expr_no_commas
520 { $$ = parser_build_binary_op ($2, $1, $3); }
521 | expr_no_commas RSHIFT expr_no_commas
522 { $$ = parser_build_binary_op ($2, $1, $3); }
523 | expr_no_commas ARITHCOMPARE expr_no_commas
524 { $$ = parser_build_binary_op ($2, $1, $3); }
525 | expr_no_commas EQCOMPARE expr_no_commas
526 { $$ = parser_build_binary_op ($2, $1, $3); }
527 | expr_no_commas '&' expr_no_commas
528 { $$ = parser_build_binary_op ($2, $1, $3); }
529 | expr_no_commas '|' expr_no_commas
530 { $$ = parser_build_binary_op ($2, $1, $3); }
531 | expr_no_commas '^' expr_no_commas
532 { $$ = parser_build_binary_op ($2, $1, $3); }
533 | expr_no_commas ANDAND
534 { $1 = truthvalue_conversion (default_conversion ($1));
535 skip_evaluation += $1 == boolean_false_node; }
536 expr_no_commas
537 { skip_evaluation -= $1 == boolean_false_node;
538 $$ = parser_build_binary_op (TRUTH_ANDIF_EXPR, $1, $4); }
539 | expr_no_commas OROR
540 { $1 = truthvalue_conversion (default_conversion ($1));
541 skip_evaluation += $1 == boolean_true_node; }
542 expr_no_commas
543 { skip_evaluation -= $1 == boolean_true_node;
544 $$ = parser_build_binary_op (TRUTH_ORIF_EXPR, $1, $4); }
545 | expr_no_commas '?'
546 { $1 = truthvalue_conversion (default_conversion ($1));
547 skip_evaluation += $1 == boolean_false_node; }
548 expr ':'
549 { skip_evaluation += (($1 == boolean_true_node)
550 - ($1 == boolean_false_node)); }
551 expr_no_commas
552 { skip_evaluation -= $1 == boolean_true_node;
553 $$ = build_conditional_expr ($1, $4, $7); }
554 | expr_no_commas '?'
555 { if (pedantic)
556 pedwarn ("ANSI C forbids omitting the middle term of a ?: expression");
557 /* Make sure first operand is calculated only once. */
558 $<ttype>2 = save_expr ($1);
559 $1 = truthvalue_conversion (default_conversion ($<ttype>2));
560 skip_evaluation += $1 == boolean_true_node; }
561 ':' expr_no_commas
562 { skip_evaluation -= $1 == boolean_true_node;
563 $$ = build_conditional_expr ($1, $<ttype>2, $5); }
564 | expr_no_commas '=' expr_no_commas
565 { char class;
566 $$ = build_modify_expr ($1, NOP_EXPR, $3);
567 class = TREE_CODE_CLASS (TREE_CODE ($$));
568 if (class == 'e' || class == '1'
569 || class == '2' || class == '<')
570 C_SET_EXP_ORIGINAL_CODE ($$, MODIFY_EXPR);
571 }
572 | expr_no_commas ASSIGN expr_no_commas
573 { char class;
574 $$ = build_modify_expr ($1, $2, $3);
575 /* This inhibits warnings in truthvalue_conversion. */
576 class = TREE_CODE_CLASS (TREE_CODE ($$));
577 if (class == 'e' || class == '1'
578 || class == '2' || class == '<')
579 C_SET_EXP_ORIGINAL_CODE ($$, ERROR_MARK);
580 }
581 ;
582
583 primary:
584 IDENTIFIER
585 {
586 $$ = lastiddecl;
587 if (!$$ || $$ == error_mark_node)
588 {
589 if (yychar == YYEMPTY)
590 yychar = YYLEX;
591 if (yychar == '(')
592 {
593 {
594 /* Ordinary implicit function declaration. */
595 $$ = implicitly_declare ($1);
596 assemble_external ($$);
597 TREE_USED ($$) = 1;
598 }
599 }
600 else if (current_function_decl == 0)
601 {
602 error ("`%s' undeclared here (not in a function)",
603 IDENTIFIER_POINTER ($1));
604 $$ = error_mark_node;
605 }
606 else
607 {
608 {
609 if (IDENTIFIER_GLOBAL_VALUE ($1) != error_mark_node
610 || IDENTIFIER_ERROR_LOCUS ($1) != current_function_decl)
611 {
612 error ("`%s' undeclared (first use in this function)",
613 IDENTIFIER_POINTER ($1));
614
615 if (! undeclared_variable_notice)
616 {
617 error ("(Each undeclared identifier is reported only once");
618 error ("for each function it appears in.)");
619 undeclared_variable_notice = 1;
620 }
621 }
622 $$ = error_mark_node;
623 /* Prevent repeated error messages. */
624 IDENTIFIER_GLOBAL_VALUE ($1) = error_mark_node;
625 IDENTIFIER_ERROR_LOCUS ($1) = current_function_decl;
626 }
627 }
628 }
629 else if (TREE_TYPE ($$) == error_mark_node)
630 $$ = error_mark_node;
631 else if (C_DECL_ANTICIPATED ($$))
632 {
633 /* The first time we see a build-in function used,
634 if it has not been declared. */
635 C_DECL_ANTICIPATED ($$) = 0;
636 if (yychar == YYEMPTY)
637 yychar = YYLEX;
638 if (yychar == '(')
639 {
640 /* Omit the implicit declaration we
641 would ordinarily do, so we don't lose
642 the actual built in type.
643 But print a diagnostic for the mismatch. */
644 if (TREE_CODE ($$) != FUNCTION_DECL)
645 error ("`%s' implicitly declared as function",
646 IDENTIFIER_POINTER (DECL_NAME ($$)));
647 else if ((TYPE_MODE (TREE_TYPE (TREE_TYPE ($$)))
648 != TYPE_MODE (integer_type_node))
649 && (TREE_TYPE (TREE_TYPE ($$))
650 != void_type_node))
651 pedwarn ("type mismatch in implicit declaration for built-in function `%s'",
652 IDENTIFIER_POINTER (DECL_NAME ($$)));
653 /* If it really returns void, change that to int. */
654 if (TREE_TYPE (TREE_TYPE ($$)) == void_type_node)
655 TREE_TYPE ($$)
656 = build_function_type (integer_type_node,
657 TYPE_ARG_TYPES (TREE_TYPE ($$)));
658 }
659 else
660 pedwarn ("built-in function `%s' used without declaration",
661 IDENTIFIER_POINTER (DECL_NAME ($$)));
662
663 /* Do what we would ordinarily do when a fn is used. */
664 assemble_external ($$);
665 TREE_USED ($$) = 1;
666 }
667 else
668 {
669 assemble_external ($$);
670 TREE_USED ($$) = 1;
671 }
672
673 if (TREE_CODE ($$) == CONST_DECL)
674 {
675 $$ = DECL_INITIAL ($$);
676 /* This is to prevent an enum whose value is 0
677 from being considered a null pointer constant. */
678 $$ = build1 (NOP_EXPR, TREE_TYPE ($$), $$);
679 TREE_CONSTANT ($$) = 1;
680 }
681 }
682 | CONSTANT
683 | string
684 { $$ = combine_strings ($1); }
685 | '(' expr ')'
686 { char class = TREE_CODE_CLASS (TREE_CODE ($2));
687 if (class == 'e' || class == '1'
688 || class == '2' || class == '<')
689 C_SET_EXP_ORIGINAL_CODE ($2, ERROR_MARK);
690 $$ = $2; }
691 | '(' error ')'
692 { $$ = error_mark_node; }
693 | compstmt_primary_start compstmt_nostart ')'
694 { tree rtl_exp;
695 if (pedantic)
696 pedwarn ("ANSI C forbids braced-groups within expressions");
697 pop_iterator_stack ();
698 pop_label_level ();
699 rtl_exp = expand_end_stmt_expr ($1);
700 /* The statements have side effects, so the group does. */
701 TREE_SIDE_EFFECTS (rtl_exp) = 1;
702
703 if (TREE_CODE ($2) == BLOCK)
704 {
705 /* Make a BIND_EXPR for the BLOCK already made. */
706 $$ = build (BIND_EXPR, TREE_TYPE (rtl_exp),
707 NULL_TREE, rtl_exp, $2);
708 /* Remove the block from the tree at this point.
709 It gets put back at the proper place
710 when the BIND_EXPR is expanded. */
711 delete_block ($2);
712 }
713 else
714 $$ = $2;
715 }
716 | compstmt_primary_start error ')'
717 {
718 /* Make sure we call expand_end_stmt_expr. Otherwise
719 we are likely to lose sequences and crash later. */
720 pop_iterator_stack ();
721 pop_label_level ();
722 expand_end_stmt_expr ($1);
723 $$ = error_mark_node;
724 }
725 | primary '(' exprlist ')' %prec '.'
726 { $$ = build_function_call ($1, $3); }
727 | primary '[' expr ']' %prec '.'
728 { $$ = build_array_ref ($1, $3); }
729 | primary '.' identifier
730 {
731 $$ = build_component_ref ($1, $3);
732 }
733 | primary POINTSAT identifier
734 {
735 tree expr = build_indirect_ref ($1, "->");
736
737 $$ = build_component_ref (expr, $3);
738 }
739 | primary PLUSPLUS
740 { $$ = build_unary_op (POSTINCREMENT_EXPR, $1, 0); }
741 | primary MINUSMINUS
742 { $$ = build_unary_op (POSTDECREMENT_EXPR, $1, 0); }
743 ;
744
745 /* Produces a STRING_CST with perhaps more STRING_CSTs chained onto it. */
746 string:
747 STRING
748 | string STRING
749 { $$ = chainon ($1, $2); }
750 ;
751
752
753 old_style_parm_decls:
754 /* empty */
755 | datadecls
756 | datadecls ELLIPSIS
757 /* ... is used here to indicate a varargs function. */
758 { c_mark_varargs ();
759 if (pedantic)
760 pedwarn ("ANSI C does not permit use of `varargs.h'"); }
761 ;
762
763 /* The following are analogous to lineno_decl, decls and decl
764 except that they do not allow nested functions.
765 They are used for old-style parm decls. */
766 lineno_datadecl:
767 save_filename save_lineno datadecl
768 { }
769 ;
770
771 datadecls:
772 lineno_datadecl
773 | errstmt
774 | datadecls lineno_datadecl
775 | lineno_datadecl errstmt
776 ;
777
778 /* We don't allow prefix attributes here because they cause reduce/reduce
779 conflicts: we can't know whether we're parsing a function decl with
780 attribute suffix, or function defn with attribute prefix on first old
781 style parm. */
782 datadecl:
783 typed_declspecs_no_prefix_attr setspecs initdecls ';'
784 { current_declspecs = TREE_VALUE (declspec_stack);
785 prefix_attributes = TREE_PURPOSE (declspec_stack);
786 declspec_stack = TREE_CHAIN (declspec_stack);
787 resume_momentary ($2); }
788 | declmods_no_prefix_attr setspecs notype_initdecls ';'
789 { current_declspecs = TREE_VALUE (declspec_stack);
790 prefix_attributes = TREE_PURPOSE (declspec_stack);
791 declspec_stack = TREE_CHAIN (declspec_stack);
792 resume_momentary ($2); }
793 | typed_declspecs_no_prefix_attr ';'
794 { shadow_tag_warned ($1, 1);
795 pedwarn ("empty declaration"); }
796 | declmods_no_prefix_attr ';'
797 { pedwarn ("empty declaration"); }
798 ;
799
800 /* This combination which saves a lineno before a decl
801 is the normal thing to use, rather than decl itself.
802 This is to avoid shift/reduce conflicts in contexts
803 where statement labels are allowed. */
804 lineno_decl:
805 save_filename save_lineno decl
806 { }
807 ;
808
809 decls:
810 lineno_decl
811 | errstmt
812 | decls lineno_decl
813 | lineno_decl errstmt
814 ;
815
816 /* records the type and storage class specs to use for processing
817 the declarators that follow.
818 Maintains a stack of outer-level values of current_declspecs,
819 for the sake of parm declarations nested in function declarators. */
820 setspecs: /* empty */
821 { $$ = suspend_momentary ();
822 pending_xref_error ();
823 declspec_stack = tree_cons (prefix_attributes,
824 current_declspecs,
825 declspec_stack);
826 split_specs_attrs ($<ttype>0,
827 &current_declspecs, &prefix_attributes); }
828 ;
829
830 /* ??? Yuck. See after_type_declarator. */
831 setattrs: /* empty */
832 { prefix_attributes = chainon (prefix_attributes, $<ttype>0); }
833 ;
834
835 decl:
836 typed_declspecs setspecs initdecls ';'
837 { current_declspecs = TREE_VALUE (declspec_stack);
838 prefix_attributes = TREE_PURPOSE (declspec_stack);
839 declspec_stack = TREE_CHAIN (declspec_stack);
840 resume_momentary ($2); }
841 | declmods setspecs notype_initdecls ';'
842 { current_declspecs = TREE_VALUE (declspec_stack);
843 prefix_attributes = TREE_PURPOSE (declspec_stack);
844 declspec_stack = TREE_CHAIN (declspec_stack);
845 resume_momentary ($2); }
846 | typed_declspecs setspecs nested_function
847 { current_declspecs = TREE_VALUE (declspec_stack);
848 prefix_attributes = TREE_PURPOSE (declspec_stack);
849 declspec_stack = TREE_CHAIN (declspec_stack);
850 resume_momentary ($2); }
851 | declmods setspecs notype_nested_function
852 { current_declspecs = TREE_VALUE (declspec_stack);
853 prefix_attributes = TREE_PURPOSE (declspec_stack);
854 declspec_stack = TREE_CHAIN (declspec_stack);
855 resume_momentary ($2); }
856 | typed_declspecs ';'
857 { shadow_tag ($1); }
858 | declmods ';'
859 { pedwarn ("empty declaration"); }
860 | extension decl
861 { RESTORE_WARN_FLAGS ($1); }
862 ;
863
864 /* Declspecs which contain at least one type specifier or typedef name.
865 (Just `const' or `volatile' is not enough.)
866 A typedef'd name following these is taken as a name to be declared.
867 Declspecs have a non-NULL TREE_VALUE, attributes do not. */
868
869 typed_declspecs:
870 typespec reserved_declspecs
871 { $$ = tree_cons (NULL_TREE, $1, $2); }
872 | declmods typespec reserved_declspecs
873 { $$ = chainon ($3, tree_cons (NULL_TREE, $2, $1)); }
874 ;
875
876 reserved_declspecs: /* empty */
877 { $$ = NULL_TREE; }
878 | reserved_declspecs typespecqual_reserved
879 { $$ = tree_cons (NULL_TREE, $2, $1); }
880 | reserved_declspecs SCSPEC
881 { if (extra_warnings)
882 warning ("`%s' is not at beginning of declaration",
883 IDENTIFIER_POINTER ($2));
884 $$ = tree_cons (NULL_TREE, $2, $1); }
885 | reserved_declspecs attributes
886 { $$ = tree_cons ($2, NULL_TREE, $1); }
887 ;
888
889 typed_declspecs_no_prefix_attr:
890 typespec reserved_declspecs_no_prefix_attr
891 { $$ = tree_cons (NULL_TREE, $1, $2); }
892 | declmods_no_prefix_attr typespec reserved_declspecs_no_prefix_attr
893 { $$ = chainon ($3, tree_cons (NULL_TREE, $2, $1)); }
894 ;
895
896 reserved_declspecs_no_prefix_attr:
897 /* empty */
898 { $$ = NULL_TREE; }
899 | reserved_declspecs_no_prefix_attr typespecqual_reserved
900 { $$ = tree_cons (NULL_TREE, $2, $1); }
901 | reserved_declspecs_no_prefix_attr SCSPEC
902 { if (extra_warnings)
903 warning ("`%s' is not at beginning of declaration",
904 IDENTIFIER_POINTER ($2));
905 $$ = tree_cons (NULL_TREE, $2, $1); }
906 ;
907
908 /* List of just storage classes, type modifiers, and prefix attributes.
909 A declaration can start with just this, but then it cannot be used
910 to redeclare a typedef-name.
911 Declspecs have a non-NULL TREE_VALUE, attributes do not. */
912
913 declmods:
914 declmods_no_prefix_attr
915 { $$ = $1; }
916 | attributes
917 { $$ = tree_cons ($1, NULL_TREE, NULL_TREE); }
918 | declmods declmods_no_prefix_attr
919 { $$ = chainon ($2, $1); }
920 | declmods attributes
921 { $$ = tree_cons ($2, NULL_TREE, $1); }
922 ;
923
924 declmods_no_prefix_attr:
925 TYPE_QUAL
926 { $$ = tree_cons (NULL_TREE, $1, NULL_TREE);
927 TREE_STATIC ($$) = 1; }
928 | SCSPEC
929 { $$ = tree_cons (NULL_TREE, $1, NULL_TREE); }
930 | declmods_no_prefix_attr TYPE_QUAL
931 { $$ = tree_cons (NULL_TREE, $2, $1);
932 TREE_STATIC ($$) = 1; }
933 | declmods_no_prefix_attr SCSPEC
934 { if (extra_warnings && TREE_STATIC ($1))
935 warning ("`%s' is not at beginning of declaration",
936 IDENTIFIER_POINTER ($2));
937 $$ = tree_cons (NULL_TREE, $2, $1);
938 TREE_STATIC ($$) = TREE_STATIC ($1); }
939 ;
940
941
942 /* Used instead of declspecs where storage classes are not allowed
943 (that is, for typenames and structure components).
944 Don't accept a typedef-name if anything but a modifier precedes it. */
945
946 typed_typespecs:
947 typespec reserved_typespecquals
948 { $$ = tree_cons (NULL_TREE, $1, $2); }
949 | nonempty_type_quals typespec reserved_typespecquals
950 { $$ = chainon ($3, tree_cons (NULL_TREE, $2, $1)); }
951 ;
952
953 reserved_typespecquals: /* empty */
954 { $$ = NULL_TREE; }
955 | reserved_typespecquals typespecqual_reserved
956 { $$ = tree_cons (NULL_TREE, $2, $1); }
957 ;
958
959 /* A typespec (but not a type qualifier).
960 Once we have seen one of these in a declaration,
961 if a typedef name appears then it is being redeclared. */
962
963 typespec: TYPESPEC
964 | structsp
965 | TYPENAME
966 { /* For a typedef name, record the meaning, not the name.
967 In case of `foo foo, bar;'. */
968 $$ = lookup_name ($1); }
969 | TYPEOF '(' expr ')'
970 { $$ = TREE_TYPE ($3); }
971 | TYPEOF '(' typename ')'
972 { $$ = groktypename ($3); }
973 ;
974
975 /* A typespec that is a reserved word, or a type qualifier. */
976
977 typespecqual_reserved: TYPESPEC
978 | TYPE_QUAL
979 | structsp
980 ;
981
982 initdecls:
983 initdcl
984 | initdecls ',' initdcl
985 ;
986
987 notype_initdecls:
988 notype_initdcl
989 | notype_initdecls ',' initdcl
990 ;
991
992 maybeasm:
993 /* empty */
994 { $$ = NULL_TREE; }
995 | ASM_KEYWORD '(' string ')'
996 { if (TREE_CHAIN ($3)) $3 = combine_strings ($3);
997 $$ = $3;
998 }
999 ;
1000
1001 initdcl:
1002 declarator maybeasm maybe_attribute '='
1003 { $<ttype>$ = start_decl ($1, current_declspecs, 1,
1004 $3, prefix_attributes);
1005 start_init ($<ttype>$, $2, global_bindings_p ()); }
1006 init
1007 /* Note how the declaration of the variable is in effect while its init is parsed! */
1008 { finish_init ();
1009 finish_decl ($<ttype>5, $6, $2); }
1010 | declarator maybeasm maybe_attribute
1011 { tree d = start_decl ($1, current_declspecs, 0,
1012 $3, prefix_attributes);
1013 finish_decl (d, NULL_TREE, $2);
1014 }
1015 ;
1016
1017 notype_initdcl:
1018 notype_declarator maybeasm maybe_attribute '='
1019 { $<ttype>$ = start_decl ($1, current_declspecs, 1,
1020 $3, prefix_attributes);
1021 start_init ($<ttype>$, $2, global_bindings_p ()); }
1022 init
1023 /* Note how the declaration of the variable is in effect while its init is parsed! */
1024 { finish_init ();
1025 decl_attributes ($<ttype>5, $3, prefix_attributes);
1026 finish_decl ($<ttype>5, $6, $2); }
1027 | notype_declarator maybeasm maybe_attribute
1028 { tree d = start_decl ($1, current_declspecs, 0,
1029 $3, prefix_attributes);
1030 finish_decl (d, NULL_TREE, $2); }
1031 ;
1032 /* the * rules are dummies to accept the Apollo extended syntax
1033 so that the header files compile. */
1034 maybe_attribute:
1035 /* empty */
1036 { $$ = NULL_TREE; }
1037 | attributes
1038 { $$ = $1; }
1039 ;
1040
1041 attributes:
1042 attribute
1043 { $$ = $1; }
1044 | attributes attribute
1045 { $$ = chainon ($1, $2); }
1046 ;
1047
1048 attribute:
1049 ATTRIBUTE '(' '(' attribute_list ')' ')'
1050 { $$ = $4; }
1051 ;
1052
1053 attribute_list:
1054 attrib
1055 { $$ = $1; }
1056 | attribute_list ',' attrib
1057 { $$ = chainon ($1, $3); }
1058 ;
1059
1060 attrib:
1061 /* empty */
1062 { $$ = NULL_TREE; }
1063 | any_word
1064 { $$ = build_tree_list ($1, NULL_TREE); }
1065 | any_word '(' IDENTIFIER ')'
1066 { $$ = build_tree_list ($1, build_tree_list (NULL_TREE, $3)); }
1067 | any_word '(' IDENTIFIER ',' nonnull_exprlist ')'
1068 { $$ = build_tree_list ($1, tree_cons (NULL_TREE, $3, $5)); }
1069 | any_word '(' exprlist ')'
1070 { $$ = build_tree_list ($1, $3); }
1071 ;
1072
1073 /* This still leaves out most reserved keywords,
1074 shouldn't we include them? */
1075
1076 any_word:
1077 identifier
1078 | SCSPEC
1079 | TYPESPEC
1080 | TYPE_QUAL
1081 ;
1082 \f
1083 /* Initializers. `init' is the entry point. */
1084
1085 init:
1086 expr_no_commas
1087 | '{'
1088 { really_start_incremental_init (NULL_TREE);
1089 /* Note that the call to clear_momentary
1090 is in process_init_element. */
1091 push_momentary (); }
1092 initlist_maybe_comma '}'
1093 { $$ = pop_init_level (0);
1094 if ($$ == error_mark_node
1095 && ! (yychar == STRING || yychar == CONSTANT))
1096 pop_momentary ();
1097 else
1098 pop_momentary_nofree (); }
1099
1100 | error
1101 { $$ = error_mark_node; }
1102 ;
1103
1104 /* `initlist_maybe_comma' is the guts of an initializer in braces. */
1105 initlist_maybe_comma:
1106 /* empty */
1107 { if (pedantic)
1108 pedwarn ("ANSI C forbids empty initializer braces"); }
1109 | initlist1 maybecomma
1110 ;
1111
1112 initlist1:
1113 initelt
1114 | initlist1 ',' initelt
1115 ;
1116
1117 /* `initelt' is a single element of an initializer.
1118 It may use braces. */
1119 initelt:
1120 designator_list '=' initval
1121 | designator initval
1122 | identifier ':'
1123 { set_init_label ($1); }
1124 initval
1125 | initval
1126 ;
1127
1128 initval:
1129 '{'
1130 { push_init_level (0); }
1131 initlist_maybe_comma '}'
1132 { process_init_element (pop_init_level (0)); }
1133 | expr_no_commas
1134 { process_init_element ($1); }
1135 | error
1136 ;
1137
1138 designator_list:
1139 designator
1140 | designator_list designator
1141 ;
1142
1143 designator:
1144 '.' identifier
1145 { set_init_label ($2); }
1146 /* These are for labeled elements. The syntax for an array element
1147 initializer conflicts with the syntax for an Objective-C message,
1148 so don't include these productions in the Objective-C grammar. */
1149 | '[' expr_no_commas ELLIPSIS expr_no_commas ']'
1150 { set_init_index ($2, $4); }
1151 | '[' expr_no_commas ']'
1152 { set_init_index ($2, NULL_TREE); }
1153 ;
1154 \f
1155 nested_function:
1156 declarator
1157 { if (pedantic)
1158 pedwarn ("ANSI C forbids nested functions");
1159
1160 push_function_context ();
1161 if (! start_function (current_declspecs, $1,
1162 prefix_attributes, NULL_TREE, 1))
1163 {
1164 pop_function_context ();
1165 YYERROR1;
1166 }
1167 reinit_parse_for_function (); }
1168 old_style_parm_decls
1169 { store_parm_decls (); }
1170 /* This used to use compstmt_or_error.
1171 That caused a bug with input `f(g) int g {}',
1172 where the use of YYERROR1 above caused an error
1173 which then was handled by compstmt_or_error.
1174 There followed a repeated execution of that same rule,
1175 which called YYERROR1 again, and so on. */
1176 compstmt
1177 { finish_function (1);
1178 pop_function_context (); }
1179 ;
1180
1181 notype_nested_function:
1182 notype_declarator
1183 { if (pedantic)
1184 pedwarn ("ANSI C forbids nested functions");
1185
1186 push_function_context ();
1187 if (! start_function (current_declspecs, $1,
1188 prefix_attributes, NULL_TREE, 1))
1189 {
1190 pop_function_context ();
1191 YYERROR1;
1192 }
1193 reinit_parse_for_function (); }
1194 old_style_parm_decls
1195 { store_parm_decls (); }
1196 /* This used to use compstmt_or_error.
1197 That caused a bug with input `f(g) int g {}',
1198 where the use of YYERROR1 above caused an error
1199 which then was handled by compstmt_or_error.
1200 There followed a repeated execution of that same rule,
1201 which called YYERROR1 again, and so on. */
1202 compstmt
1203 { finish_function (1);
1204 pop_function_context (); }
1205 ;
1206
1207 /* Any kind of declarator (thus, all declarators allowed
1208 after an explicit typespec). */
1209
1210 declarator:
1211 after_type_declarator
1212 | notype_declarator
1213 ;
1214
1215 /* A declarator that is allowed only after an explicit typespec. */
1216
1217 after_type_declarator:
1218 '(' after_type_declarator ')'
1219 { $$ = $2; }
1220 | after_type_declarator '(' parmlist_or_identifiers %prec '.'
1221 { $$ = build_nt (CALL_EXPR, $1, $3, NULL_TREE); }
1222 /* | after_type_declarator '(' error ')' %prec '.'
1223 { $$ = build_nt (CALL_EXPR, $1, NULL_TREE, NULL_TREE);
1224 poplevel (0, 0, 0); } */
1225 | after_type_declarator '[' expr ']' %prec '.'
1226 { $$ = build_nt (ARRAY_REF, $1, $3); }
1227 | after_type_declarator '[' ']' %prec '.'
1228 { $$ = build_nt (ARRAY_REF, $1, NULL_TREE); }
1229 | '*' type_quals after_type_declarator %prec UNARY
1230 { $$ = make_pointer_declarator ($2, $3); }
1231 /* ??? Yuck. setattrs is a quick hack. We can't use
1232 prefix_attributes because $1 only applies to this
1233 declarator. We assume setspecs has already been done.
1234 setattrs also avoids 5 reduce/reduce conflicts (otherwise multiple
1235 attributes could be recognized here or in `attributes'). */
1236 | attributes setattrs after_type_declarator
1237 { $$ = $3; }
1238 | TYPENAME
1239 ;
1240
1241 /* Kinds of declarator that can appear in a parameter list
1242 in addition to notype_declarator. This is like after_type_declarator
1243 but does not allow a typedef name in parentheses as an identifier
1244 (because it would conflict with a function with that typedef as arg). */
1245
1246 parm_declarator:
1247 parm_declarator '(' parmlist_or_identifiers %prec '.'
1248 { $$ = build_nt (CALL_EXPR, $1, $3, NULL_TREE); }
1249 /* | parm_declarator '(' error ')' %prec '.'
1250 { $$ = build_nt (CALL_EXPR, $1, NULL_TREE, NULL_TREE);
1251 poplevel (0, 0, 0); } */
1252 | parm_declarator '[' '*' ']' %prec '.'
1253 { $$ = build_nt (ARRAY_REF, $1, NULL_TREE);
1254 if (! flag_isoc9x)
1255 error ("`[*]' in parameter declaration only allowed in ISO C 9x");
1256 }
1257 | parm_declarator '[' expr ']' %prec '.'
1258 { $$ = build_nt (ARRAY_REF, $1, $3); }
1259 | parm_declarator '[' ']' %prec '.'
1260 { $$ = build_nt (ARRAY_REF, $1, NULL_TREE); }
1261 | '*' type_quals parm_declarator %prec UNARY
1262 { $$ = make_pointer_declarator ($2, $3); }
1263 /* ??? Yuck. setattrs is a quick hack. We can't use
1264 prefix_attributes because $1 only applies to this
1265 declarator. We assume setspecs has already been done.
1266 setattrs also avoids 5 reduce/reduce conflicts (otherwise multiple
1267 attributes could be recognized here or in `attributes'). */
1268 | attributes setattrs parm_declarator
1269 { $$ = $3; }
1270 | TYPENAME
1271 ;
1272
1273 /* A declarator allowed whether or not there has been
1274 an explicit typespec. These cannot redeclare a typedef-name. */
1275
1276 notype_declarator:
1277 notype_declarator '(' parmlist_or_identifiers %prec '.'
1278 { $$ = build_nt (CALL_EXPR, $1, $3, NULL_TREE); }
1279 /* | notype_declarator '(' error ')' %prec '.'
1280 { $$ = build_nt (CALL_EXPR, $1, NULL_TREE, NULL_TREE);
1281 poplevel (0, 0, 0); } */
1282 | '(' notype_declarator ')'
1283 { $$ = $2; }
1284 | '*' type_quals notype_declarator %prec UNARY
1285 { $$ = make_pointer_declarator ($2, $3); }
1286 | notype_declarator '[' '*' ']' %prec '.'
1287 { $$ = build_nt (ARRAY_REF, $1, NULL_TREE);
1288 if (! flag_isoc9x)
1289 error ("`[*]' in parameter declaration only allowed in ISO C 9x");
1290 }
1291 | notype_declarator '[' expr ']' %prec '.'
1292 { $$ = build_nt (ARRAY_REF, $1, $3); }
1293 | notype_declarator '[' ']' %prec '.'
1294 { $$ = build_nt (ARRAY_REF, $1, NULL_TREE); }
1295 /* ??? Yuck. setattrs is a quick hack. We can't use
1296 prefix_attributes because $1 only applies to this
1297 declarator. We assume setspecs has already been done.
1298 setattrs also avoids 5 reduce/reduce conflicts (otherwise multiple
1299 attributes could be recognized here or in `attributes'). */
1300 | attributes setattrs notype_declarator
1301 { $$ = $3; }
1302 | IDENTIFIER
1303 ;
1304
1305 struct_head:
1306 STRUCT
1307 { $$ = NULL_TREE; }
1308 | STRUCT attributes
1309 { $$ = $2; }
1310 ;
1311
1312 union_head:
1313 UNION
1314 { $$ = NULL_TREE; }
1315 | UNION attributes
1316 { $$ = $2; }
1317 ;
1318
1319 enum_head:
1320 ENUM
1321 { $$ = NULL_TREE; }
1322 | ENUM attributes
1323 { $$ = $2; }
1324 ;
1325
1326 structsp:
1327 struct_head identifier '{'
1328 { $$ = start_struct (RECORD_TYPE, $2);
1329 /* Start scope of tag before parsing components. */
1330 }
1331 component_decl_list '}' maybe_attribute
1332 { $$ = finish_struct ($<ttype>4, $5, chainon ($1, $7)); }
1333 | struct_head '{' component_decl_list '}' maybe_attribute
1334 { $$ = finish_struct (start_struct (RECORD_TYPE, NULL_TREE),
1335 $3, chainon ($1, $5));
1336 }
1337 | struct_head identifier
1338 { $$ = xref_tag (RECORD_TYPE, $2); }
1339 | union_head identifier '{'
1340 { $$ = start_struct (UNION_TYPE, $2); }
1341 component_decl_list '}' maybe_attribute
1342 { $$ = finish_struct ($<ttype>4, $5, chainon ($1, $7)); }
1343 | union_head '{' component_decl_list '}' maybe_attribute
1344 { $$ = finish_struct (start_struct (UNION_TYPE, NULL_TREE),
1345 $3, chainon ($1, $5));
1346 }
1347 | union_head identifier
1348 { $$ = xref_tag (UNION_TYPE, $2); }
1349 | enum_head identifier '{'
1350 { $<itype>3 = suspend_momentary ();
1351 $$ = start_enum ($2); }
1352 enumlist maybecomma_warn '}' maybe_attribute
1353 { $$= finish_enum ($<ttype>4, nreverse ($5), chainon ($1, $8));
1354 resume_momentary ($<itype>3); }
1355 | enum_head '{'
1356 { $<itype>2 = suspend_momentary ();
1357 $$ = start_enum (NULL_TREE); }
1358 enumlist maybecomma_warn '}' maybe_attribute
1359 { $$= finish_enum ($<ttype>3, nreverse ($4), chainon ($1, $7));
1360 resume_momentary ($<itype>2); }
1361 | enum_head identifier
1362 { $$ = xref_tag (ENUMERAL_TYPE, $2); }
1363 ;
1364
1365 maybecomma:
1366 /* empty */
1367 | ','
1368 ;
1369
1370 maybecomma_warn:
1371 /* empty */
1372 | ','
1373 { if (pedantic && ! flag_isoc9x)
1374 pedwarn ("comma at end of enumerator list"); }
1375 ;
1376
1377 component_decl_list:
1378 component_decl_list2
1379 { $$ = $1; }
1380 | component_decl_list2 component_decl
1381 { $$ = chainon ($1, $2);
1382 pedwarn ("no semicolon at end of struct or union"); }
1383 ;
1384
1385 component_decl_list2: /* empty */
1386 { $$ = NULL_TREE; }
1387 | component_decl_list2 component_decl ';'
1388 { $$ = chainon ($1, $2); }
1389 | component_decl_list2 ';'
1390 { if (pedantic)
1391 pedwarn ("extra semicolon in struct or union specified"); }
1392 ;
1393
1394 /* There is a shift-reduce conflict here, because `components' may
1395 start with a `typename'. It happens that shifting (the default resolution)
1396 does the right thing, because it treats the `typename' as part of
1397 a `typed_typespecs'.
1398
1399 It is possible that this same technique would allow the distinction
1400 between `notype_initdecls' and `initdecls' to be eliminated.
1401 But I am being cautious and not trying it. */
1402
1403 component_decl:
1404 typed_typespecs setspecs components
1405 { $$ = $3;
1406 current_declspecs = TREE_VALUE (declspec_stack);
1407 prefix_attributes = TREE_PURPOSE (declspec_stack);
1408 declspec_stack = TREE_CHAIN (declspec_stack);
1409 resume_momentary ($2); }
1410 | typed_typespecs setspecs save_filename save_lineno maybe_attribute
1411 {
1412 /* Support for unnamed structs or unions as members of
1413 structs or unions (which is [a] useful and [b] supports
1414 MS P-SDK). */
1415 if (pedantic)
1416 pedwarn ("ANSI C doesn't support unnamed structs/unions");
1417
1418 $$ = grokfield($3, $4, NULL, current_declspecs, NULL_TREE);
1419 current_declspecs = TREE_VALUE (declspec_stack);
1420 prefix_attributes = TREE_PURPOSE (declspec_stack);
1421 declspec_stack = TREE_CHAIN (declspec_stack);
1422 resume_momentary ($2);
1423 }
1424 | nonempty_type_quals setspecs components
1425 { $$ = $3;
1426 current_declspecs = TREE_VALUE (declspec_stack);
1427 prefix_attributes = TREE_PURPOSE (declspec_stack);
1428 declspec_stack = TREE_CHAIN (declspec_stack);
1429 resume_momentary ($2); }
1430 | nonempty_type_quals
1431 { if (pedantic)
1432 pedwarn ("ANSI C forbids member declarations with no members");
1433 shadow_tag($1);
1434 $$ = NULL_TREE; }
1435 | error
1436 { $$ = NULL_TREE; }
1437 | extension component_decl
1438 { $$ = $2;
1439 RESTORE_WARN_FLAGS ($1); }
1440 ;
1441
1442 components:
1443 component_declarator
1444 | components ',' component_declarator
1445 { $$ = chainon ($1, $3); }
1446 ;
1447
1448 component_declarator:
1449 save_filename save_lineno declarator maybe_attribute
1450 { $$ = grokfield ($1, $2, $3, current_declspecs, NULL_TREE);
1451 decl_attributes ($$, $4, prefix_attributes); }
1452 | save_filename save_lineno
1453 declarator ':' expr_no_commas maybe_attribute
1454 { $$ = grokfield ($1, $2, $3, current_declspecs, $5);
1455 decl_attributes ($$, $6, prefix_attributes); }
1456 | save_filename save_lineno ':' expr_no_commas maybe_attribute
1457 { $$ = grokfield ($1, $2, NULL_TREE, current_declspecs, $4);
1458 decl_attributes ($$, $5, prefix_attributes); }
1459 ;
1460
1461 /* We chain the enumerators in reverse order.
1462 They are put in forward order where enumlist is used.
1463 (The order used to be significant, but no longer is so.
1464 However, we still maintain the order, just to be clean.) */
1465
1466 enumlist:
1467 enumerator
1468 | enumlist ',' enumerator
1469 { if ($1 == error_mark_node)
1470 $$ = $1;
1471 else
1472 $$ = chainon ($3, $1); }
1473 | error
1474 { $$ = error_mark_node; }
1475 ;
1476
1477
1478 enumerator:
1479 identifier
1480 { $$ = build_enumerator ($1, NULL_TREE); }
1481 | identifier '=' expr_no_commas
1482 { $$ = build_enumerator ($1, $3); }
1483 ;
1484
1485 typename:
1486 typed_typespecs absdcl
1487 { $$ = build_tree_list ($1, $2); }
1488 | nonempty_type_quals absdcl
1489 { $$ = build_tree_list ($1, $2); }
1490 ;
1491
1492 absdcl: /* an absolute declarator */
1493 /* empty */
1494 { $$ = NULL_TREE; }
1495 | absdcl1
1496 ;
1497
1498 nonempty_type_quals:
1499 TYPE_QUAL
1500 { $$ = tree_cons (NULL_TREE, $1, NULL_TREE); }
1501 | nonempty_type_quals TYPE_QUAL
1502 { $$ = tree_cons (NULL_TREE, $2, $1); }
1503 ;
1504
1505 type_quals:
1506 /* empty */
1507 { $$ = NULL_TREE; }
1508 | type_quals TYPE_QUAL
1509 { $$ = tree_cons (NULL_TREE, $2, $1); }
1510 ;
1511
1512 absdcl1: /* a nonempty absolute declarator */
1513 '(' absdcl1 ')'
1514 { $$ = $2; }
1515 /* `(typedef)1' is `int'. */
1516 | '*' type_quals absdcl1 %prec UNARY
1517 { $$ = make_pointer_declarator ($2, $3); }
1518 | '*' type_quals %prec UNARY
1519 { $$ = make_pointer_declarator ($2, NULL_TREE); }
1520 | absdcl1 '(' parmlist %prec '.'
1521 { $$ = build_nt (CALL_EXPR, $1, $3, NULL_TREE); }
1522 | absdcl1 '[' expr ']' %prec '.'
1523 { $$ = build_nt (ARRAY_REF, $1, $3); }
1524 | absdcl1 '[' ']' %prec '.'
1525 { $$ = build_nt (ARRAY_REF, $1, NULL_TREE); }
1526 | '(' parmlist %prec '.'
1527 { $$ = build_nt (CALL_EXPR, NULL_TREE, $2, NULL_TREE); }
1528 | '[' expr ']' %prec '.'
1529 { $$ = build_nt (ARRAY_REF, NULL_TREE, $2); }
1530 | '[' ']' %prec '.'
1531 { $$ = build_nt (ARRAY_REF, NULL_TREE, NULL_TREE); }
1532 /* ??? It appears we have to support attributes here, however
1533 using prefix_attributes is wrong. */
1534 | attributes setattrs absdcl1
1535 { $$ = $3; }
1536 ;
1537
1538 /* at least one statement, the first of which parses without error. */
1539 /* stmts is used only after decls, so an invalid first statement
1540 is actually regarded as an invalid decl and part of the decls. */
1541
1542 stmts:
1543 lineno_stmt_or_labels
1544 {
1545 if (pedantic && $1)
1546 pedwarn ("ANSI C forbids label at end of compound statement");
1547 }
1548 ;
1549
1550 lineno_stmt_or_labels:
1551 lineno_stmt_or_label
1552 | lineno_stmt_or_labels lineno_stmt_or_label
1553 { $$ = $2; }
1554 | lineno_stmt_or_labels errstmt
1555 { $$ = 0; }
1556 ;
1557
1558 xstmts:
1559 /* empty */
1560 | stmts
1561 ;
1562
1563 errstmt: error ';'
1564 ;
1565
1566 pushlevel: /* empty */
1567 { emit_line_note (input_filename, lineno);
1568 pushlevel (0);
1569 clear_last_expr ();
1570 push_momentary ();
1571 expand_start_bindings (0);
1572 }
1573 ;
1574
1575 /* Read zero or more forward-declarations for labels
1576 that nested functions can jump to. */
1577 maybe_label_decls:
1578 /* empty */
1579 | label_decls
1580 { if (pedantic)
1581 pedwarn ("ANSI C forbids label declarations"); }
1582 ;
1583
1584 label_decls:
1585 label_decl
1586 | label_decls label_decl
1587 ;
1588
1589 label_decl:
1590 LABEL identifiers_or_typenames ';'
1591 { tree link;
1592 for (link = $2; link; link = TREE_CHAIN (link))
1593 {
1594 tree label = shadow_label (TREE_VALUE (link));
1595 C_DECLARED_LABEL_FLAG (label) = 1;
1596 declare_nonlocal_label (label);
1597 }
1598 }
1599 ;
1600
1601 /* This is the body of a function definition.
1602 It causes syntax errors to ignore to the next openbrace. */
1603 compstmt_or_error:
1604 compstmt
1605 {}
1606 | error compstmt
1607 ;
1608
1609 compstmt_start: '{' { compstmt_count++; }
1610
1611 compstmt_nostart: '}'
1612 { $$ = convert (void_type_node, integer_zero_node); }
1613 | pushlevel maybe_label_decls decls xstmts '}'
1614 { emit_line_note (input_filename, lineno);
1615 expand_end_bindings (getdecls (), 1, 0);
1616 $$ = poplevel (1, 1, 0);
1617 if (yychar == CONSTANT || yychar == STRING)
1618 pop_momentary_nofree ();
1619 else
1620 pop_momentary (); }
1621 | pushlevel maybe_label_decls error '}'
1622 { emit_line_note (input_filename, lineno);
1623 expand_end_bindings (getdecls (), kept_level_p (), 0);
1624 $$ = poplevel (kept_level_p (), 0, 0);
1625 if (yychar == CONSTANT || yychar == STRING)
1626 pop_momentary_nofree ();
1627 else
1628 pop_momentary (); }
1629 | pushlevel maybe_label_decls stmts '}'
1630 { emit_line_note (input_filename, lineno);
1631 expand_end_bindings (getdecls (), kept_level_p (), 0);
1632 $$ = poplevel (kept_level_p (), 0, 0);
1633 if (yychar == CONSTANT || yychar == STRING)
1634 pop_momentary_nofree ();
1635 else
1636 pop_momentary (); }
1637 ;
1638
1639 compstmt_primary_start:
1640 '(' '{'
1641 { if (current_function_decl == 0)
1642 {
1643 error ("braced-group within expression allowed only inside a function");
1644 YYERROR;
1645 }
1646 /* We must force a BLOCK for this level
1647 so that, if it is not expanded later,
1648 there is a way to turn off the entire subtree of blocks
1649 that are contained in it. */
1650 keep_next_level ();
1651 push_iterator_stack ();
1652 push_label_level ();
1653 $$ = expand_start_stmt_expr ();
1654 compstmt_count++;
1655 }
1656
1657 compstmt: compstmt_start compstmt_nostart
1658 { $$ = $2; }
1659 ;
1660
1661 /* Value is number of statements counted as of the closeparen. */
1662 simple_if:
1663 if_prefix lineno_labeled_stmt
1664 /* Make sure c_expand_end_cond is run once
1665 for each call to c_expand_start_cond.
1666 Otherwise a crash is likely. */
1667 | if_prefix error
1668 ;
1669
1670 if_prefix:
1671 IF '(' expr ')'
1672 { emit_line_note ($<filename>-1, $<lineno>0);
1673 c_expand_start_cond (truthvalue_conversion ($3), 0,
1674 compstmt_count);
1675 $<itype>$ = stmt_count;
1676 if_stmt_file = $<filename>-1;
1677 if_stmt_line = $<lineno>0;
1678 position_after_white_space (); }
1679 ;
1680
1681 /* This is a subroutine of stmt.
1682 It is used twice, once for valid DO statements
1683 and once for catching errors in parsing the end test. */
1684 do_stmt_start:
1685 DO
1686 { stmt_count++;
1687 compstmt_count++;
1688 emit_line_note ($<filename>-1, $<lineno>0);
1689 /* See comment in `while' alternative, above. */
1690 emit_nop ();
1691 expand_start_loop_continue_elsewhere (1);
1692 position_after_white_space (); }
1693 lineno_labeled_stmt WHILE
1694 { expand_loop_continue_here (); }
1695 ;
1696
1697 save_filename:
1698 { $$ = input_filename; }
1699 ;
1700
1701 save_lineno:
1702 { $$ = lineno; }
1703 ;
1704
1705 lineno_labeled_stmt:
1706 save_filename save_lineno stmt
1707 { }
1708 /* | save_filename save_lineno error
1709 { }
1710 */
1711 | save_filename save_lineno label lineno_labeled_stmt
1712 { }
1713 ;
1714
1715 lineno_stmt_or_label:
1716 save_filename save_lineno stmt_or_label
1717 { $$ = $3; }
1718 ;
1719
1720 stmt_or_label:
1721 stmt
1722 { $$ = 0; }
1723 | label
1724 { $$ = 1; }
1725 ;
1726
1727 /* Parse a single real statement, not including any labels. */
1728 stmt:
1729 compstmt
1730 { stmt_count++; }
1731 | all_iter_stmt
1732 | expr ';'
1733 { stmt_count++;
1734 emit_line_note ($<filename>-1, $<lineno>0);
1735 /* It appears that this should not be done--that a non-lvalue array
1736 shouldn't get an error if the value isn't used.
1737 Section 3.2.2.1 says that an array lvalue gets converted to a pointer
1738 if it appears as a top-level expression,
1739 but says nothing about non-lvalue arrays. */
1740 #if 0
1741 /* Call default_conversion to get an error
1742 on referring to a register array if pedantic. */
1743 if (TREE_CODE (TREE_TYPE ($1)) == ARRAY_TYPE
1744 || TREE_CODE (TREE_TYPE ($1)) == FUNCTION_TYPE)
1745 $1 = default_conversion ($1);
1746 #endif
1747 iterator_expand ($1);
1748 clear_momentary (); }
1749 | simple_if ELSE
1750 { c_expand_start_else ();
1751 $<itype>1 = stmt_count;
1752 position_after_white_space (); }
1753 lineno_labeled_stmt
1754 { c_expand_end_cond ();
1755 if (extra_warnings && stmt_count == $<itype>1)
1756 warning ("empty body in an else-statement"); }
1757 | simple_if %prec IF
1758 { c_expand_end_cond ();
1759 /* This warning is here instead of in simple_if, because we
1760 do not want a warning if an empty if is followed by an
1761 else statement. Increment stmt_count so we don't
1762 give a second error if this is a nested `if'. */
1763 if (extra_warnings && stmt_count++ == $<itype>1)
1764 warning_with_file_and_line (if_stmt_file, if_stmt_line,
1765 "empty body in an if-statement"); }
1766 /* Make sure c_expand_end_cond is run once
1767 for each call to c_expand_start_cond.
1768 Otherwise a crash is likely. */
1769 | simple_if ELSE error
1770 { c_expand_end_cond (); }
1771 | WHILE
1772 { stmt_count++;
1773 emit_line_note ($<filename>-1, $<lineno>0);
1774 /* The emit_nop used to come before emit_line_note,
1775 but that made the nop seem like part of the preceding line.
1776 And that was confusing when the preceding line was
1777 inside of an if statement and was not really executed.
1778 I think it ought to work to put the nop after the line number.
1779 We will see. --rms, July 15, 1991. */
1780 emit_nop (); }
1781 '(' expr ')'
1782 { /* Don't start the loop till we have succeeded
1783 in parsing the end test. This is to make sure
1784 that we end every loop we start. */
1785 expand_start_loop (1);
1786 emit_line_note (input_filename, lineno);
1787 expand_exit_loop_if_false (NULL_PTR,
1788 truthvalue_conversion ($4));
1789 position_after_white_space (); }
1790 lineno_labeled_stmt
1791 { expand_end_loop (); }
1792 | do_stmt_start
1793 '(' expr ')' ';'
1794 { emit_line_note (input_filename, lineno);
1795 expand_exit_loop_if_false (NULL_PTR,
1796 truthvalue_conversion ($3));
1797 expand_end_loop ();
1798 clear_momentary (); }
1799 /* This rule is needed to make sure we end every loop we start. */
1800 | do_stmt_start error
1801 { expand_end_loop ();
1802 clear_momentary (); }
1803 | FOR
1804 '(' xexpr ';'
1805 { stmt_count++;
1806 emit_line_note ($<filename>-1, $<lineno>0);
1807 /* See comment in `while' alternative, above. */
1808 emit_nop ();
1809 if ($3) c_expand_expr_stmt ($3);
1810 /* Next step is to call expand_start_loop_continue_elsewhere,
1811 but wait till after we parse the entire for (...).
1812 Otherwise, invalid input might cause us to call that
1813 fn without calling expand_end_loop. */
1814 }
1815 xexpr ';'
1816 /* Can't emit now; wait till after expand_start_loop... */
1817 { $<lineno>7 = lineno;
1818 $<filename>$ = input_filename; }
1819 xexpr ')'
1820 {
1821 /* Start the loop. Doing this after parsing
1822 all the expressions ensures we will end the loop. */
1823 expand_start_loop_continue_elsewhere (1);
1824 /* Emit the end-test, with a line number. */
1825 emit_line_note ($<filename>8, $<lineno>7);
1826 if ($6)
1827 expand_exit_loop_if_false (NULL_PTR,
1828 truthvalue_conversion ($6));
1829 /* Don't let the tree nodes for $9 be discarded by
1830 clear_momentary during the parsing of the next stmt. */
1831 push_momentary ();
1832 $<lineno>7 = lineno;
1833 $<filename>8 = input_filename;
1834 position_after_white_space (); }
1835 lineno_labeled_stmt
1836 { /* Emit the increment expression, with a line number. */
1837 emit_line_note ($<filename>8, $<lineno>7);
1838 expand_loop_continue_here ();
1839 if ($9)
1840 c_expand_expr_stmt ($9);
1841 if (yychar == CONSTANT || yychar == STRING)
1842 pop_momentary_nofree ();
1843 else
1844 pop_momentary ();
1845 expand_end_loop (); }
1846 | SWITCH '(' expr ')'
1847 { stmt_count++;
1848 emit_line_note ($<filename>-1, $<lineno>0);
1849 c_expand_start_case ($3);
1850 /* Don't let the tree nodes for $3 be discarded by
1851 clear_momentary during the parsing of the next stmt. */
1852 push_momentary ();
1853 position_after_white_space (); }
1854 lineno_labeled_stmt
1855 { expand_end_case ($3);
1856 if (yychar == CONSTANT || yychar == STRING)
1857 pop_momentary_nofree ();
1858 else
1859 pop_momentary (); }
1860 | BREAK ';'
1861 { stmt_count++;
1862 emit_line_note ($<filename>-1, $<lineno>0);
1863 if ( ! expand_exit_something ())
1864 error ("break statement not within loop or switch"); }
1865 | CONTINUE ';'
1866 { stmt_count++;
1867 emit_line_note ($<filename>-1, $<lineno>0);
1868 if (! expand_continue_loop (NULL_PTR))
1869 error ("continue statement not within a loop"); }
1870 | RETURN ';'
1871 { stmt_count++;
1872 emit_line_note ($<filename>-1, $<lineno>0);
1873 c_expand_return (NULL_TREE); }
1874 | RETURN expr ';'
1875 { stmt_count++;
1876 emit_line_note ($<filename>-1, $<lineno>0);
1877 c_expand_return ($2); }
1878 | ASM_KEYWORD maybe_type_qual '(' expr ')' ';'
1879 { stmt_count++;
1880 emit_line_note ($<filename>-1, $<lineno>0);
1881 STRIP_NOPS ($4);
1882 if ((TREE_CODE ($4) == ADDR_EXPR
1883 && TREE_CODE (TREE_OPERAND ($4, 0)) == STRING_CST)
1884 || TREE_CODE ($4) == STRING_CST)
1885 expand_asm ($4);
1886 else
1887 error ("argument of `asm' is not a constant string"); }
1888 /* This is the case with just output operands. */
1889 | ASM_KEYWORD maybe_type_qual '(' expr ':' asm_operands ')' ';'
1890 { stmt_count++;
1891 emit_line_note ($<filename>-1, $<lineno>0);
1892 c_expand_asm_operands ($4, $6, NULL_TREE, NULL_TREE,
1893 $2 == ridpointers[(int)RID_VOLATILE],
1894 input_filename, lineno); }
1895 /* This is the case with input operands as well. */
1896 | ASM_KEYWORD maybe_type_qual '(' expr ':' asm_operands ':' asm_operands ')' ';'
1897 { stmt_count++;
1898 emit_line_note ($<filename>-1, $<lineno>0);
1899 c_expand_asm_operands ($4, $6, $8, NULL_TREE,
1900 $2 == ridpointers[(int)RID_VOLATILE],
1901 input_filename, lineno); }
1902 /* This is the case with clobbered registers as well. */
1903 | ASM_KEYWORD maybe_type_qual '(' expr ':' asm_operands ':'
1904 asm_operands ':' asm_clobbers ')' ';'
1905 { stmt_count++;
1906 emit_line_note ($<filename>-1, $<lineno>0);
1907 c_expand_asm_operands ($4, $6, $8, $10,
1908 $2 == ridpointers[(int)RID_VOLATILE],
1909 input_filename, lineno); }
1910 | GOTO identifier ';'
1911 { tree decl;
1912 stmt_count++;
1913 emit_line_note ($<filename>-1, $<lineno>0);
1914 decl = lookup_label ($2);
1915 if (decl != 0)
1916 {
1917 TREE_USED (decl) = 1;
1918 expand_goto (decl);
1919 }
1920 }
1921 | GOTO '*' expr ';'
1922 { if (pedantic)
1923 pedwarn ("ANSI C forbids `goto *expr;'");
1924 stmt_count++;
1925 emit_line_note ($<filename>-1, $<lineno>0);
1926 expand_computed_goto (convert (ptr_type_node, $3)); }
1927 | ';'
1928 ;
1929
1930 all_iter_stmt:
1931 all_iter_stmt_simple
1932 /* | all_iter_stmt_with_decl */
1933 ;
1934
1935 all_iter_stmt_simple:
1936 FOR '(' primary ')'
1937 {
1938 /* The value returned by this action is */
1939 /* 1 if everything is OK */
1940 /* 0 in case of error or already bound iterator */
1941
1942 $<itype>$ = 0;
1943 if (TREE_CODE ($3) != VAR_DECL)
1944 error ("invalid `for (ITERATOR)' syntax");
1945 else if (! ITERATOR_P ($3))
1946 error ("`%s' is not an iterator",
1947 IDENTIFIER_POINTER (DECL_NAME ($3)));
1948 else if (ITERATOR_BOUND_P ($3))
1949 error ("`for (%s)' inside expansion of same iterator",
1950 IDENTIFIER_POINTER (DECL_NAME ($3)));
1951 else
1952 {
1953 $<itype>$ = 1;
1954 iterator_for_loop_start ($3);
1955 }
1956 }
1957 lineno_labeled_stmt
1958 {
1959 if ($<itype>5)
1960 iterator_for_loop_end ($3);
1961 }
1962
1963 /* This really should allow any kind of declaration,
1964 for generality. Fix it before turning it back on.
1965
1966 all_iter_stmt_with_decl:
1967 FOR '(' ITERATOR pushlevel setspecs iterator_spec ')'
1968 {
1969 */ /* The value returned by this action is */
1970 /* 1 if everything is OK */
1971 /* 0 in case of error or already bound iterator */
1972 /*
1973 iterator_for_loop_start ($6);
1974 }
1975 lineno_labeled_stmt
1976 {
1977 iterator_for_loop_end ($6);
1978 emit_line_note (input_filename, lineno);
1979 expand_end_bindings (getdecls (), 1, 0);
1980 $<ttype>$ = poplevel (1, 1, 0);
1981 if (yychar == CONSTANT || yychar == STRING)
1982 pop_momentary_nofree ();
1983 else
1984 pop_momentary ();
1985 }
1986 */
1987
1988 /* Any kind of label, including jump labels and case labels.
1989 ANSI C accepts labels only before statements, but we allow them
1990 also at the end of a compound statement. */
1991
1992 label: CASE expr_no_commas ':'
1993 { register tree value = check_case_value ($2);
1994 register tree label
1995 = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE);
1996
1997 stmt_count++;
1998
1999 if (value != error_mark_node)
2000 {
2001 tree duplicate;
2002 int success;
2003
2004 if (pedantic && ! INTEGRAL_TYPE_P (TREE_TYPE (value)))
2005 pedwarn ("label must have integral type in ANSI C");
2006
2007 success = pushcase (value, convert_and_check,
2008 label, &duplicate);
2009
2010 if (success == 1)
2011 error ("case label not within a switch statement");
2012 else if (success == 2)
2013 {
2014 error ("duplicate case value");
2015 error_with_decl (duplicate, "this is the first entry for that value");
2016 }
2017 else if (success == 3)
2018 warning ("case value out of range");
2019 else if (success == 5)
2020 error ("case label within scope of cleanup or variable array");
2021 }
2022 position_after_white_space (); }
2023 | CASE expr_no_commas ELLIPSIS expr_no_commas ':'
2024 { register tree value1 = check_case_value ($2);
2025 register tree value2 = check_case_value ($4);
2026 register tree label
2027 = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE);
2028
2029 if (pedantic)
2030 pedwarn ("ANSI C forbids case ranges");
2031 stmt_count++;
2032
2033 if (value1 != error_mark_node && value2 != error_mark_node)
2034 {
2035 tree duplicate;
2036 int success = pushcase_range (value1, value2,
2037 convert_and_check, label,
2038 &duplicate);
2039 if (success == 1)
2040 error ("case label not within a switch statement");
2041 else if (success == 2)
2042 {
2043 error ("duplicate case value");
2044 error_with_decl (duplicate, "this is the first entry for that value");
2045 }
2046 else if (success == 3)
2047 warning ("case value out of range");
2048 else if (success == 4)
2049 warning ("empty case range");
2050 else if (success == 5)
2051 error ("case label within scope of cleanup or variable array");
2052 }
2053 position_after_white_space (); }
2054 | DEFAULT ':'
2055 {
2056 tree duplicate;
2057 register tree label
2058 = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE);
2059 int success = pushcase (NULL_TREE, 0, label, &duplicate);
2060 stmt_count++;
2061 if (success == 1)
2062 error ("default label not within a switch statement");
2063 else if (success == 2)
2064 {
2065 error ("multiple default labels in one switch");
2066 error_with_decl (duplicate, "this is the first default label");
2067 }
2068 position_after_white_space (); }
2069 | identifier ':' maybe_attribute
2070 { tree label = define_label (input_filename, lineno, $1);
2071 stmt_count++;
2072 emit_nop ();
2073 if (label)
2074 {
2075 expand_label (label);
2076 decl_attributes (label, $3, NULL_TREE);
2077 }
2078 position_after_white_space (); }
2079 ;
2080
2081 /* Either a type-qualifier or nothing. First thing in an `asm' statement. */
2082
2083 maybe_type_qual:
2084 /* empty */
2085 { emit_line_note (input_filename, lineno);
2086 $$ = NULL_TREE; }
2087 | TYPE_QUAL
2088 { emit_line_note (input_filename, lineno); }
2089 ;
2090
2091 xexpr:
2092 /* empty */
2093 { $$ = NULL_TREE; }
2094 | expr
2095 ;
2096
2097 /* These are the operands other than the first string and colon
2098 in asm ("addextend %2,%1": "=dm" (x), "0" (y), "g" (*x)) */
2099 asm_operands: /* empty */
2100 { $$ = NULL_TREE; }
2101 | nonnull_asm_operands
2102 ;
2103
2104 nonnull_asm_operands:
2105 asm_operand
2106 | nonnull_asm_operands ',' asm_operand
2107 { $$ = chainon ($1, $3); }
2108 ;
2109
2110 asm_operand:
2111 STRING '(' expr ')'
2112 { $$ = build_tree_list ($1, $3); }
2113 ;
2114
2115 asm_clobbers:
2116 string
2117 { $$ = tree_cons (NULL_TREE, combine_strings ($1), NULL_TREE); }
2118 | asm_clobbers ',' string
2119 { $$ = tree_cons (NULL_TREE, combine_strings ($3), $1); }
2120 ;
2121 \f
2122 /* This is what appears inside the parens in a function declarator.
2123 Its value is a list of ..._TYPE nodes. */
2124 parmlist:
2125 { pushlevel (0);
2126 clear_parm_order ();
2127 declare_parm_level (0); }
2128 parmlist_1
2129 { $$ = $2;
2130 parmlist_tags_warning ();
2131 poplevel (0, 0, 0); }
2132 ;
2133
2134 parmlist_1:
2135 parmlist_2 ')'
2136 | parms ';'
2137 { tree parm;
2138 if (pedantic)
2139 pedwarn ("ANSI C forbids forward parameter declarations");
2140 /* Mark the forward decls as such. */
2141 for (parm = getdecls (); parm; parm = TREE_CHAIN (parm))
2142 TREE_ASM_WRITTEN (parm) = 1;
2143 clear_parm_order (); }
2144 parmlist_1
2145 { $$ = $4; }
2146 | error ')'
2147 { $$ = tree_cons (NULL_TREE, NULL_TREE, NULL_TREE); }
2148 ;
2149
2150 /* This is what appears inside the parens in a function declarator.
2151 Is value is represented in the format that grokdeclarator expects. */
2152 parmlist_2: /* empty */
2153 { $$ = get_parm_info (0); }
2154 | ELLIPSIS
2155 { $$ = get_parm_info (0);
2156 /* Gcc used to allow this as an extension. However, it does
2157 not work for all targets, and thus has been disabled.
2158 Also, since func (...) and func () are indistinguishable,
2159 it caused problems with the code in expand_builtin which
2160 tries to verify that BUILT_IN_NEXT_ARG is being used
2161 correctly. */
2162 error ("ANSI C requires a named argument before `...'");
2163 }
2164 | parms
2165 { $$ = get_parm_info (1); }
2166 | parms ',' ELLIPSIS
2167 { $$ = get_parm_info (0); }
2168 ;
2169
2170 parms:
2171 parm
2172 { push_parm_decl ($1); }
2173 | parms ',' parm
2174 { push_parm_decl ($3); }
2175 ;
2176
2177 /* A single parameter declaration or parameter type name,
2178 as found in a parmlist. */
2179 parm:
2180 typed_declspecs setspecs parm_declarator maybe_attribute
2181 { $$ = build_tree_list (build_tree_list (current_declspecs,
2182 $3),
2183 build_tree_list (prefix_attributes,
2184 $4));
2185 current_declspecs = TREE_VALUE (declspec_stack);
2186 prefix_attributes = TREE_PURPOSE (declspec_stack);
2187 declspec_stack = TREE_CHAIN (declspec_stack);
2188 resume_momentary ($2); }
2189 | typed_declspecs setspecs notype_declarator maybe_attribute
2190 { $$ = build_tree_list (build_tree_list (current_declspecs,
2191 $3),
2192 build_tree_list (prefix_attributes,
2193 $4));
2194 current_declspecs = TREE_VALUE (declspec_stack);
2195 prefix_attributes = TREE_PURPOSE (declspec_stack);
2196 declspec_stack = TREE_CHAIN (declspec_stack);
2197 resume_momentary ($2); }
2198 | typed_declspecs setspecs absdcl maybe_attribute
2199 { $$ = build_tree_list (build_tree_list (current_declspecs,
2200 $3),
2201 build_tree_list (prefix_attributes,
2202 $4));
2203 current_declspecs = TREE_VALUE (declspec_stack);
2204 prefix_attributes = TREE_PURPOSE (declspec_stack);
2205 declspec_stack = TREE_CHAIN (declspec_stack);
2206 resume_momentary ($2); }
2207 | declmods setspecs notype_declarator maybe_attribute
2208 { $$ = build_tree_list (build_tree_list (current_declspecs,
2209 $3),
2210 build_tree_list (prefix_attributes,
2211 $4));
2212 current_declspecs = TREE_VALUE (declspec_stack);
2213 prefix_attributes = TREE_PURPOSE (declspec_stack);
2214 declspec_stack = TREE_CHAIN (declspec_stack);
2215 resume_momentary ($2); }
2216
2217 | declmods setspecs absdcl maybe_attribute
2218 { $$ = build_tree_list (build_tree_list (current_declspecs,
2219 $3),
2220 build_tree_list (prefix_attributes,
2221 $4));
2222 current_declspecs = TREE_VALUE (declspec_stack);
2223 prefix_attributes = TREE_PURPOSE (declspec_stack);
2224 declspec_stack = TREE_CHAIN (declspec_stack);
2225 resume_momentary ($2); }
2226 ;
2227
2228 /* This is used in a function definition
2229 where either a parmlist or an identifier list is ok.
2230 Its value is a list of ..._TYPE nodes or a list of identifiers. */
2231 parmlist_or_identifiers:
2232 { pushlevel (0);
2233 clear_parm_order ();
2234 declare_parm_level (1); }
2235 parmlist_or_identifiers_1
2236 { $$ = $2;
2237 parmlist_tags_warning ();
2238 poplevel (0, 0, 0); }
2239 ;
2240
2241 parmlist_or_identifiers_1:
2242 parmlist_1
2243 | identifiers ')'
2244 { tree t;
2245 for (t = $1; t; t = TREE_CHAIN (t))
2246 if (TREE_VALUE (t) == NULL_TREE)
2247 error ("`...' in old-style identifier list");
2248 $$ = tree_cons (NULL_TREE, NULL_TREE, $1); }
2249 ;
2250
2251 /* A nonempty list of identifiers. */
2252 identifiers:
2253 IDENTIFIER
2254 { $$ = build_tree_list (NULL_TREE, $1); }
2255 | identifiers ',' IDENTIFIER
2256 { $$ = chainon ($1, build_tree_list (NULL_TREE, $3)); }
2257 ;
2258
2259 /* A nonempty list of identifiers, including typenames. */
2260 identifiers_or_typenames:
2261 identifier
2262 { $$ = build_tree_list (NULL_TREE, $1); }
2263 | identifiers_or_typenames ',' identifier
2264 { $$ = chainon ($1, build_tree_list (NULL_TREE, $3)); }
2265 ;
2266
2267 extension:
2268 EXTENSION
2269 { $$ = SAVE_WARN_FLAGS();
2270 pedantic = 0;
2271 warn_pointer_arith = 0; }
2272 ;
2273 \f
2274 %%
Mirror of the offical gcc git repository hosted at gcc.gnu.org