| blob | 45b04dab71addd2759a38433339d81f7b1b54ff2 |
1 /* YACC parser for C syntax and for Objective C. -*-c-*-
2 Copyright (C) 1987, 1988, 1989, 1992, 1993, 1994, 1995, 1996,
3 1997, 1998, 1999, 2000, 2001 Free Software Foundation, Inc.
5 This file is part of GNU CC.
7 GNU CC is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2, or (at your option)
10 any later version.
12 GNU CC is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GNU CC; see the file COPYING. If not, write to
19 the Free Software Foundation, 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
22 /* This file defines the grammar of C and that of Objective C.
23 ifobjc ... end ifobjc conditionals contain code for Objective C only.
24 ifc ... end ifc conditionals contain code for C only.
25 Sed commands in Makefile.in are used to convert this file into
26 c-parse.y and into objc-parse.y. */
28 /* To whomever it may concern: I have heard that such a thing was once
29 written by AT&T, but I have never seen it. */
31 ifobjc
32 %expect 31
33 end ifobjc
34 ifc
35 %expect 10
36 end ifc
38 %{
39 #include "config.h"
40 #include "system.h"
41 #include <setjmp.h>
42 #include "tree.h"
43 #include "input.h"
44 #include "cpplib.h"
45 #include "intl.h"
46 #include "timevar.h"
47 #include "c-lex.h"
48 #include "c-tree.h"
49 #include "c-pragma.h"
50 #include "flags.h"
51 #include "output.h"
52 #include "toplev.h"
53 #include "ggc.h"
54 #include "diagnostic.h"
56 #ifdef MULTIBYTE_CHARS
57 #include <locale.h>
58 #endif
60 ifobjc
61 #include "objc-act.h"
62 end ifobjc
64 /* Since parsers are distinct for each language, put the language string
65 definition here. */
66 ifobjc
67 const char * const language_string = "GNU Objective-C";
68 end ifobjc
69 ifc
70 const char * const language_string = "GNU C";
71 end ifc
73 /* Like YYERROR but do call yyerror. */
74 #define YYERROR1 { yyerror ("syntax error"); YYERROR; }
76 /* Cause the "yydebug" variable to be defined. */
77 #define YYDEBUG 1
79 /* Rename the "yyparse" function so that we can override it elsewhere. */
80 #define yyparse yyparse_1
81 %}
83 %start program
85 %union {long itype; tree ttype; enum tree_code code;
86 const char *filename; int lineno; }
88 /* All identifiers that are not reserved words
89 and are not declared typedefs in the current block */
90 %token IDENTIFIER
92 /* All identifiers that are declared typedefs in the current block.
93 In some contexts, they are treated just like IDENTIFIER,
94 but they can also serve as typespecs in declarations. */
95 %token TYPENAME
97 /* Reserved words that specify storage class.
98 yylval contains an IDENTIFIER_NODE which indicates which one. */
99 %token SCSPEC
101 /* Reserved words that specify type.
102 yylval contains an IDENTIFIER_NODE which indicates which one. */
103 %token TYPESPEC
105 /* Reserved words that qualify type: "const", "volatile", or "restrict".
106 yylval contains an IDENTIFIER_NODE which indicates which one. */
107 %token TYPE_QUAL
109 /* Character or numeric constants.
110 yylval is the node for the constant. */
111 %token CONSTANT
113 /* String constants in raw form.
114 yylval is a STRING_CST node. */
115 %token STRING
117 /* "...", used for functions with variable arglists. */
118 %token ELLIPSIS
120 /* the reserved words */
121 /* SCO include files test "ASM", so use something else. */
122 %token SIZEOF ENUM STRUCT UNION IF ELSE WHILE DO FOR SWITCH CASE DEFAULT
123 %token BREAK CONTINUE RETURN GOTO ASM_KEYWORD TYPEOF ALIGNOF
124 %token ATTRIBUTE EXTENSION LABEL
125 %token REALPART IMAGPART VA_ARG
126 %token PTR_VALUE PTR_BASE PTR_EXTENT
128 /* function name can be a string const or a var decl. */
129 %token STRING_FUNC_NAME VAR_FUNC_NAME
131 /* Add precedence rules to solve dangling else s/r conflict */
132 %nonassoc IF
133 %nonassoc ELSE
135 /* Define the operator tokens and their precedences.
136 The value is an integer because, if used, it is the tree code
137 to use in the expression made from the operator. */
139 %right <code> ASSIGN '='
140 %right <code> '?' ':'
141 %left <code> OROR
142 %left <code> ANDAND
143 %left <code> '|'
144 %left <code> '^'
145 %left <code> '&'
146 %left <code> EQCOMPARE
147 %left <code> ARITHCOMPARE
148 %left <code> LSHIFT RSHIFT
149 %left <code> '+' '-'
150 %left <code> '*' '/' '%'
151 %right <code> UNARY PLUSPLUS MINUSMINUS
152 %left HYPERUNARY
153 %left <code> POINTSAT '.' '(' '['
155 /* The Objective-C keywords. These are included in C and in
156 Objective C, so that the token codes are the same in both. */
157 %token INTERFACE IMPLEMENTATION END SELECTOR DEFS ENCODE
158 %token CLASSNAME PUBLIC PRIVATE PROTECTED PROTOCOL OBJECTNAME CLASS ALIAS
160 /* Objective-C string constants in raw form.
161 yylval is an STRING_CST node. */
162 %token OBJC_STRING
165 %type <code> unop
166 %type <ttype> ENUM STRUCT UNION IF ELSE WHILE DO FOR SWITCH CASE DEFAULT
167 %type <ttype> BREAK CONTINUE RETURN GOTO ASM_KEYWORD SIZEOF TYPEOF ALIGNOF
169 %type <ttype> identifier IDENTIFIER TYPENAME CONSTANT expr nonnull_exprlist exprlist
170 %type <ttype> expr_no_commas cast_expr unary_expr primary string STRING
171 %type <ttype> declspecs_nosc_nots_nosa_noea declspecs_nosc_nots_nosa_ea
172 %type <ttype> declspecs_nosc_nots_sa_noea declspecs_nosc_nots_sa_ea
173 %type <ttype> declspecs_nosc_ts_nosa_noea declspecs_nosc_ts_nosa_ea
174 %type <ttype> declspecs_nosc_ts_sa_noea declspecs_nosc_ts_sa_ea
175 %type <ttype> declspecs_sc_nots_nosa_noea declspecs_sc_nots_nosa_ea
176 %type <ttype> declspecs_sc_nots_sa_noea declspecs_sc_nots_sa_ea
177 %type <ttype> declspecs_sc_ts_nosa_noea declspecs_sc_ts_nosa_ea
178 %type <ttype> declspecs_sc_ts_sa_noea declspecs_sc_ts_sa_ea
179 %type <ttype> declspecs_ts declspecs_nots
180 %type <ttype> declspecs_ts_nosa declspecs_nots_nosa
181 %type <ttype> declspecs_nosc_ts declspecs_nosc_nots declspecs_nosc declspecs
182 %type <ttype> maybe_type_quals_setattrs typespec_nonattr typespec_attr
183 %type <ttype> typespec_reserved_nonattr typespec_reserved_attr
184 %type <ttype> typespec_nonreserved_nonattr
186 %type <ttype> SCSPEC TYPESPEC TYPE_QUAL maybe_type_qual
187 %type <ttype> initdecls notype_initdecls initdcl notype_initdcl
188 %type <ttype> init maybeasm
189 %type <ttype> asm_operands nonnull_asm_operands asm_operand asm_clobbers
190 %type <ttype> maybe_attribute attributes attribute attribute_list attrib
191 %type <ttype> maybe_setattrs
192 %type <ttype> any_word extension
194 %type <ttype> compstmt compstmt_start compstmt_nostart compstmt_primary_start
195 %type <ttype> do_stmt_start poplevel stmt label
197 %type <ttype> c99_block_start c99_block_end
198 %type <ttype> declarator
199 %type <ttype> notype_declarator after_type_declarator
200 %type <ttype> parm_declarator
201 %type <ttype> parm_declarator_starttypename parm_declarator_nostarttypename
202 %type <ttype> array_declarator
204 %type <ttype> structsp_attr structsp_nonattr
205 %type <ttype> component_decl_list component_decl_list2
206 %type <ttype> component_decl components components_notype component_declarator
207 %type <ttype> component_notype_declarator
208 %type <ttype> enumlist enumerator
209 %type <ttype> struct_head union_head enum_head
210 %type <ttype> typename absdcl absdcl1 absdcl1_ea absdcl1_noea
211 %type <ttype> direct_absdcl1 absdcl_maybe_attribute
212 %type <ttype> xexpr parms parm firstparm identifiers
214 %type <ttype> parmlist parmlist_1 parmlist_2
215 %type <ttype> parmlist_or_identifiers parmlist_or_identifiers_1
216 %type <ttype> identifiers_or_typenames
218 %type <itype> setspecs setspecs_fp
220 %type <filename> save_filename
221 %type <lineno> save_lineno
222 \f
223 ifobjc
224 /* the Objective-C nonterminals */
226 %type <ttype> ivar_decl_list ivar_decls ivar_decl ivars ivar_declarator
227 %type <ttype> methoddecl unaryselector keywordselector selector
228 %type <ttype> keyworddecl receiver objcmessageexpr messageargs
229 %type <ttype> keywordexpr keywordarglist keywordarg
230 %type <ttype> myparms myparm optparmlist reservedwords objcselectorexpr
231 %type <ttype> selectorarg keywordnamelist keywordname objcencodeexpr
232 %type <ttype> objc_string non_empty_protocolrefs protocolrefs identifier_list objcprotocolexpr
234 %type <ttype> CLASSNAME OBJC_STRING OBJECTNAME
235 end ifobjc
236 \f
237 %{
238 /* Number of statements (loosely speaking) and compound statements
239 seen so far. */
240 static int stmt_count;
241 static int compstmt_count;
243 /* Input file and line number of the end of the body of last simple_if;
244 used by the stmt-rule immediately after simple_if returns. */
245 static const char *if_stmt_file;
246 static int if_stmt_line;
248 /* List of types and structure classes of the current declaration. */
249 static tree current_declspecs = NULL_TREE;
250 static tree prefix_attributes = NULL_TREE;
252 /* Stack of saved values of current_declspecs and prefix_attributes. */
253 static tree declspec_stack;
255 /* For __extension__, save/restore the warning flags which are
256 controlled by __extension__. */
257 #define SAVE_WARN_FLAGS() \
258 size_int (pedantic | (warn_pointer_arith << 1))
259 #define RESTORE_WARN_FLAGS(tval) \
260 do { \
261 int val = tree_low_cst (tval, 0); \
262 pedantic = val & 1; \
263 warn_pointer_arith = (val >> 1) & 1; \
264 } while (0)
266 ifobjc
267 /* Objective-C specific information */
269 tree objc_interface_context;
270 tree objc_implementation_context;
271 tree objc_method_context;
272 tree objc_ivar_chain;
273 tree objc_ivar_context;
274 enum tree_code objc_inherit_code;
275 int objc_receiver_context;
276 int objc_public_flag;
277 int objc_pq_context;
279 end ifobjc
281 /* Tell yyparse how to print a token's value, if yydebug is set. */
283 #define YYPRINT(FILE,YYCHAR,YYLVAL) yyprint(FILE,YYCHAR,YYLVAL)
285 static void yyprint PARAMS ((FILE *, int, YYSTYPE));
286 static void yyerror PARAMS ((const char *));
287 static int yylexname PARAMS ((void));
288 static inline int _yylex PARAMS ((void));
289 static int yylex PARAMS ((void));
290 static void init_reswords PARAMS ((void));
292 /* Add GC roots for variables local to this file. */
293 void
294 c_parse_init ()
295 {
296 ggc_add_tree_root (&declspec_stack, 1);
297 ggc_add_tree_root (¤t_declspecs, 1);
298 ggc_add_tree_root (&prefix_attributes, 1);
299 ifobjc
300 ggc_add_tree_root (&objc_interface_context, 1);
301 ggc_add_tree_root (&objc_implementation_context, 1);
302 ggc_add_tree_root (&objc_method_context, 1);
303 ggc_add_tree_root (&objc_ivar_chain, 1);
304 ggc_add_tree_root (&objc_ivar_context, 1);
305 end ifobjc
306 }
308 %}
309 \f
310 %%
311 program: /* empty */
312 { if (pedantic)
313 pedwarn ("ISO C forbids an empty source file");
314 finish_file ();
315 }
316 | extdefs
317 {
318 /* In case there were missing closebraces,
319 get us back to the global binding level. */
320 while (! global_bindings_p ())
321 poplevel (0, 0, 0);
322 ifc
323 finish_fname_decls ();
324 end ifc
325 finish_file ();
326 }
327 ;
329 /* the reason for the strange actions in this rule
330 is so that notype_initdecls when reached via datadef
331 can find a valid list of type and sc specs in $0. */
333 extdefs:
334 {$<ttype>$ = NULL_TREE; } extdef
335 | extdefs {$<ttype>$ = NULL_TREE; ggc_collect(); } extdef
336 ;
338 extdef:
339 fndef
340 | datadef
341 ifobjc
342 | objcdef
343 end ifobjc
344 | ASM_KEYWORD '(' expr ')' ';'
345 { STRIP_NOPS ($3);
346 if ((TREE_CODE ($3) == ADDR_EXPR
347 && TREE_CODE (TREE_OPERAND ($3, 0)) == STRING_CST)
348 || TREE_CODE ($3) == STRING_CST)
349 assemble_asm ($3);
350 else
351 error ("argument of `asm' is not a constant string"); }
352 | extension extdef
353 { RESTORE_WARN_FLAGS ($1); }
354 ;
356 datadef:
357 setspecs notype_initdecls ';'
358 { if (pedantic)
359 error ("ISO C forbids data definition with no type or storage class");
360 else if (!flag_traditional)
361 warning ("data definition has no type or storage class");
363 current_declspecs = TREE_VALUE (declspec_stack);
364 prefix_attributes = TREE_PURPOSE (declspec_stack);
365 declspec_stack = TREE_CHAIN (declspec_stack); }
366 | declspecs_nots setspecs notype_initdecls ';'
367 { current_declspecs = TREE_VALUE (declspec_stack);
368 prefix_attributes = TREE_PURPOSE (declspec_stack);
369 declspec_stack = TREE_CHAIN (declspec_stack); }
370 | declspecs_ts setspecs initdecls ';'
371 { current_declspecs = TREE_VALUE (declspec_stack);
372 prefix_attributes = TREE_PURPOSE (declspec_stack);
373 declspec_stack = TREE_CHAIN (declspec_stack); }
374 | declspecs ';'
375 { shadow_tag ($1); }
376 | error ';'
377 | error '}'
378 | ';'
379 { if (pedantic)
380 pedwarn ("ISO C does not allow extra `;' outside of a function"); }
381 ;
382 \f
383 fndef:
384 declspecs_ts setspecs declarator
385 { if (! start_function (current_declspecs, $3,
386 prefix_attributes, NULL_TREE))
387 YYERROR1;
388 }
389 old_style_parm_decls
390 { store_parm_decls (); }
391 save_filename save_lineno compstmt_or_error
392 { DECL_SOURCE_FILE (current_function_decl) = $7;
393 DECL_SOURCE_LINE (current_function_decl) = $8;
394 finish_function (0);
395 current_declspecs = TREE_VALUE (declspec_stack);
396 prefix_attributes = TREE_PURPOSE (declspec_stack);
397 declspec_stack = TREE_CHAIN (declspec_stack); }
398 | declspecs_ts setspecs declarator error
399 { current_declspecs = TREE_VALUE (declspec_stack);
400 prefix_attributes = TREE_PURPOSE (declspec_stack);
401 declspec_stack = TREE_CHAIN (declspec_stack); }
402 | declspecs_nots setspecs notype_declarator
403 { if (! start_function (current_declspecs, $3,
404 prefix_attributes, NULL_TREE))
405 YYERROR1;
406 }
407 old_style_parm_decls
408 { store_parm_decls (); }
409 save_filename save_lineno compstmt_or_error
410 { DECL_SOURCE_FILE (current_function_decl) = $7;
411 DECL_SOURCE_LINE (current_function_decl) = $8;
412 finish_function (0);
413 current_declspecs = TREE_VALUE (declspec_stack);
414 prefix_attributes = TREE_PURPOSE (declspec_stack);
415 declspec_stack = TREE_CHAIN (declspec_stack); }
416 | declspecs_nots setspecs notype_declarator error
417 { current_declspecs = TREE_VALUE (declspec_stack);
418 prefix_attributes = TREE_PURPOSE (declspec_stack);
419 declspec_stack = TREE_CHAIN (declspec_stack); }
420 | setspecs notype_declarator
421 { if (! start_function (NULL_TREE, $2,
422 prefix_attributes, NULL_TREE))
423 YYERROR1;
424 }
425 old_style_parm_decls
426 { store_parm_decls (); }
427 save_filename save_lineno compstmt_or_error
428 { DECL_SOURCE_FILE (current_function_decl) = $6;
429 DECL_SOURCE_LINE (current_function_decl) = $7;
430 finish_function (0);
431 current_declspecs = TREE_VALUE (declspec_stack);
432 prefix_attributes = TREE_PURPOSE (declspec_stack);
433 declspec_stack = TREE_CHAIN (declspec_stack); }
434 | setspecs notype_declarator error
435 { current_declspecs = TREE_VALUE (declspec_stack);
436 prefix_attributes = TREE_PURPOSE (declspec_stack);
437 declspec_stack = TREE_CHAIN (declspec_stack); }
438 ;
440 identifier:
441 IDENTIFIER
442 | TYPENAME
443 ifobjc
444 | OBJECTNAME
445 | CLASSNAME
446 end ifobjc
447 ;
449 unop: '&'
450 { $$ = ADDR_EXPR; }
451 | '-'
452 { $$ = NEGATE_EXPR; }
453 | '+'
454 { $$ = CONVERT_EXPR;
455 ifc
456 if (warn_traditional && !in_system_header)
457 warning ("traditional C rejects the unary plus operator");
458 end ifc
459 }
460 | PLUSPLUS
461 { $$ = PREINCREMENT_EXPR; }
462 | MINUSMINUS
463 { $$ = PREDECREMENT_EXPR; }
464 | '~'
465 { $$ = BIT_NOT_EXPR; }
466 | '!'
467 { $$ = TRUTH_NOT_EXPR; }
468 ;
470 expr: nonnull_exprlist
471 { $$ = build_compound_expr ($1); }
472 ;
474 exprlist:
475 /* empty */
476 { $$ = NULL_TREE; }
477 | nonnull_exprlist
478 ;
480 nonnull_exprlist:
481 expr_no_commas
482 { $$ = build_tree_list (NULL_TREE, $1); }
483 | nonnull_exprlist ',' expr_no_commas
484 { chainon ($1, build_tree_list (NULL_TREE, $3)); }
485 ;
487 unary_expr:
488 primary
489 | '*' cast_expr %prec UNARY
490 { $$ = build_indirect_ref ($2, "unary *"); }
491 /* __extension__ turns off -pedantic for following primary. */
492 | extension cast_expr %prec UNARY
493 { $$ = $2;
494 RESTORE_WARN_FLAGS ($1); }
495 | unop cast_expr %prec UNARY
496 { $$ = build_unary_op ($1, $2, 0);
497 overflow_warning ($$); }
498 /* Refer to the address of a label as a pointer. */
499 | ANDAND identifier
500 { $$ = finish_label_address_expr ($2); }
501 /* This seems to be impossible on some machines, so let's turn it off.
502 You can use __builtin_next_arg to find the anonymous stack args.
503 | '&' ELLIPSIS
504 { tree types = TYPE_ARG_TYPES (TREE_TYPE (current_function_decl));
505 $$ = error_mark_node;
506 if (TREE_VALUE (tree_last (types)) == void_type_node)
507 error ("`&...' used in function with fixed number of arguments");
508 else
509 {
510 if (pedantic)
511 pedwarn ("ISO C forbids `&...'");
512 $$ = tree_last (DECL_ARGUMENTS (current_function_decl));
513 $$ = build_unary_op (ADDR_EXPR, $$, 0);
514 } }
515 */
516 | sizeof unary_expr %prec UNARY
517 { skip_evaluation--;
518 if (TREE_CODE ($2) == COMPONENT_REF
519 && DECL_C_BIT_FIELD (TREE_OPERAND ($2, 1)))
520 error ("`sizeof' applied to a bit-field");
521 $$ = c_sizeof (TREE_TYPE ($2)); }
522 | sizeof '(' typename ')' %prec HYPERUNARY
523 { skip_evaluation--;
524 $$ = c_sizeof (groktypename ($3)); }
525 | alignof unary_expr %prec UNARY
526 { skip_evaluation--;
527 $$ = c_alignof_expr ($2); }
528 | alignof '(' typename ')' %prec HYPERUNARY
529 { skip_evaluation--;
530 $$ = c_alignof (groktypename ($3)); }
531 | REALPART cast_expr %prec UNARY
532 { $$ = build_unary_op (REALPART_EXPR, $2, 0); }
533 | IMAGPART cast_expr %prec UNARY
534 { $$ = build_unary_op (IMAGPART_EXPR, $2, 0); }
535 ;
537 sizeof:
538 SIZEOF { skip_evaluation++; }
539 ;
541 alignof:
542 ALIGNOF { skip_evaluation++; }
543 ;
545 cast_expr:
546 unary_expr
547 | '(' typename ')' cast_expr %prec UNARY
548 { $$ = c_cast_expr ($2, $4); }
549 ;
551 expr_no_commas:
552 cast_expr
553 | expr_no_commas '+' expr_no_commas
554 { $$ = parser_build_binary_op ($2, $1, $3); }
555 | expr_no_commas '-' expr_no_commas
556 { $$ = parser_build_binary_op ($2, $1, $3); }
557 | expr_no_commas '*' expr_no_commas
558 { $$ = parser_build_binary_op ($2, $1, $3); }
559 | expr_no_commas '/' expr_no_commas
560 { $$ = parser_build_binary_op ($2, $1, $3); }
561 | expr_no_commas '%' expr_no_commas
562 { $$ = parser_build_binary_op ($2, $1, $3); }
563 | expr_no_commas LSHIFT expr_no_commas
564 { $$ = parser_build_binary_op ($2, $1, $3); }
565 | expr_no_commas RSHIFT expr_no_commas
566 { $$ = parser_build_binary_op ($2, $1, $3); }
567 | expr_no_commas ARITHCOMPARE expr_no_commas
568 { $$ = parser_build_binary_op ($2, $1, $3); }
569 | expr_no_commas EQCOMPARE expr_no_commas
570 { $$ = parser_build_binary_op ($2, $1, $3); }
571 | expr_no_commas '&' expr_no_commas
572 { $$ = parser_build_binary_op ($2, $1, $3); }
573 | expr_no_commas '|' expr_no_commas
574 { $$ = parser_build_binary_op ($2, $1, $3); }
575 | expr_no_commas '^' expr_no_commas
576 { $$ = parser_build_binary_op ($2, $1, $3); }
577 | expr_no_commas ANDAND
578 { $1 = truthvalue_conversion (default_conversion ($1));
579 skip_evaluation += $1 == boolean_false_node; }
580 expr_no_commas
581 { skip_evaluation -= $1 == boolean_false_node;
582 $$ = parser_build_binary_op (TRUTH_ANDIF_EXPR, $1, $4); }
583 | expr_no_commas OROR
584 { $1 = truthvalue_conversion (default_conversion ($1));
585 skip_evaluation += $1 == boolean_true_node; }
586 expr_no_commas
587 { skip_evaluation -= $1 == boolean_true_node;
588 $$ = parser_build_binary_op (TRUTH_ORIF_EXPR, $1, $4); }
589 | expr_no_commas '?'
590 { $1 = truthvalue_conversion (default_conversion ($1));
591 skip_evaluation += $1 == boolean_false_node; }
592 expr ':'
593 { skip_evaluation += (($1 == boolean_true_node)
594 - ($1 == boolean_false_node)); }
595 expr_no_commas
596 { skip_evaluation -= $1 == boolean_true_node;
597 $$ = build_conditional_expr ($1, $4, $7); }
598 | expr_no_commas '?'
599 { if (pedantic)
600 pedwarn ("ISO C forbids omitting the middle term of a ?: expression");
601 /* Make sure first operand is calculated only once. */
602 $<ttype>2 = save_expr ($1);
603 $1 = truthvalue_conversion (default_conversion ($<ttype>2));
604 skip_evaluation += $1 == boolean_true_node; }
605 ':' expr_no_commas
606 { skip_evaluation -= $1 == boolean_true_node;
607 $$ = build_conditional_expr ($1, $<ttype>2, $5); }
608 | expr_no_commas '=' expr_no_commas
609 { char class;
610 $$ = build_modify_expr ($1, NOP_EXPR, $3);
611 class = TREE_CODE_CLASS (TREE_CODE ($$));
612 if (class == 'e' || class == '1'
613 || class == '2' || class == '<')
614 C_SET_EXP_ORIGINAL_CODE ($$, MODIFY_EXPR);
615 }
616 | expr_no_commas ASSIGN expr_no_commas
617 { char class;
618 $$ = build_modify_expr ($1, $2, $3);
619 /* This inhibits warnings in truthvalue_conversion. */
620 class = TREE_CODE_CLASS (TREE_CODE ($$));
621 if (class == 'e' || class == '1'
622 || class == '2' || class == '<')
623 C_SET_EXP_ORIGINAL_CODE ($$, ERROR_MARK);
624 }
625 ;
627 primary:
628 IDENTIFIER
629 {
630 if (yychar == YYEMPTY)
631 yychar = YYLEX;
632 $$ = build_external_ref ($1, yychar == '(');
633 }
634 | CONSTANT
635 | string
636 { $$ = combine_strings ($1); }
637 | VAR_FUNC_NAME
638 { $$ = fname_decl (C_RID_CODE ($$), $$); }
639 | '(' typename ')' '{'
640 { start_init (NULL_TREE, NULL, 0);
641 $2 = groktypename ($2);
642 really_start_incremental_init ($2); }
643 initlist_maybe_comma '}' %prec UNARY
644 { const char *name;
645 tree result = pop_init_level (0);
646 tree type = $2;
647 finish_init ();
649 if (pedantic && ! flag_isoc99)
650 pedwarn ("ISO C89 forbids compound literals");
651 if (TYPE_NAME (type) != 0)
652 {
653 if (TREE_CODE (TYPE_NAME (type)) == IDENTIFIER_NODE)
654 name = IDENTIFIER_POINTER (TYPE_NAME (type));
655 else
656 name = IDENTIFIER_POINTER (DECL_NAME (TYPE_NAME (type)));
657 }
658 else
659 name = "";
660 $$ = result;
661 if (TREE_CODE (type) == ARRAY_TYPE && !COMPLETE_TYPE_P (type))
662 {
663 int failure = complete_array_type (type, $$, 1);
664 if (failure)
665 abort ();
666 }
667 }
668 | '(' expr ')'
669 { char class = TREE_CODE_CLASS (TREE_CODE ($2));
670 if (class == 'e' || class == '1'
671 || class == '2' || class == '<')
672 C_SET_EXP_ORIGINAL_CODE ($2, ERROR_MARK);
673 $$ = $2; }
674 | '(' error ')'
675 { $$ = error_mark_node; }
676 | compstmt_primary_start compstmt_nostart ')'
677 { tree saved_last_tree;
679 if (pedantic)
680 pedwarn ("ISO C forbids braced-groups within expressions");
681 pop_label_level ();
683 saved_last_tree = COMPOUND_BODY ($1);
684 RECHAIN_STMTS ($1, COMPOUND_BODY ($1));
685 last_tree = saved_last_tree;
686 TREE_CHAIN (last_tree) = NULL_TREE;
687 if (!last_expr_type)
688 last_expr_type = void_type_node;
689 $$ = build1 (STMT_EXPR, last_expr_type, $1);
690 TREE_SIDE_EFFECTS ($$) = 1;
691 }
692 | compstmt_primary_start error ')'
693 {
694 pop_label_level ();
695 last_tree = COMPOUND_BODY ($1);
696 TREE_CHAIN (last_tree) = NULL_TREE;
697 $$ = error_mark_node;
698 }
699 | primary '(' exprlist ')' %prec '.'
700 { $$ = build_function_call ($1, $3); }
701 | VA_ARG '(' expr_no_commas ',' typename ')'
702 { $$ = build_va_arg ($3, groktypename ($5)); }
703 | primary '[' expr ']' %prec '.'
704 { $$ = build_array_ref ($1, $3); }
705 | primary '.' identifier
706 {
707 ifobjc
708 if (!is_public ($1, $3))
709 $$ = error_mark_node;
710 else
711 end ifobjc
712 $$ = build_component_ref ($1, $3);
713 }
714 | primary POINTSAT identifier
715 {
716 tree expr = build_indirect_ref ($1, "->");
718 ifobjc
719 if (!is_public (expr, $3))
720 $$ = error_mark_node;
721 else
722 end ifobjc
723 $$ = build_component_ref (expr, $3);
724 }
725 | primary PLUSPLUS
726 { $$ = build_unary_op (POSTINCREMENT_EXPR, $1, 0); }
727 | primary MINUSMINUS
728 { $$ = build_unary_op (POSTDECREMENT_EXPR, $1, 0); }
729 ifobjc
730 | objcmessageexpr
731 { $$ = build_message_expr ($1); }
732 | objcselectorexpr
733 { $$ = build_selector_expr ($1); }
734 | objcprotocolexpr
735 { $$ = build_protocol_expr ($1); }
736 | objcencodeexpr
737 { $$ = build_encode_expr ($1); }
738 | objc_string
739 { $$ = build_objc_string_object ($1); }
740 end ifobjc
741 ;
743 /* Produces a STRING_CST with perhaps more STRING_CSTs chained onto it. */
744 string:
745 STRING
746 | string STRING
747 {
748 ifc
749 static int last_lineno = 0;
750 static const char *last_input_filename = 0;
751 end ifc
752 $$ = chainon ($1, $2);
753 ifc
754 if (warn_traditional && !in_system_header
755 && (lineno != last_lineno || !last_input_filename ||
756 strcmp (last_input_filename, input_filename)))
757 {
758 warning ("traditional C rejects string concatenation");
759 last_lineno = lineno;
760 last_input_filename = input_filename;
761 }
762 end ifc
763 }
764 ;
766 ifobjc
767 /* Produces an STRING_CST with perhaps more STRING_CSTs chained
768 onto it, which is to be read as an ObjC string object. */
769 objc_string:
770 OBJC_STRING
771 | objc_string OBJC_STRING
772 { $$ = chainon ($1, $2); }
773 ;
774 end ifobjc
776 old_style_parm_decls:
777 /* empty */
778 | datadecls
779 | datadecls ELLIPSIS
780 /* ... is used here to indicate a varargs function. */
781 { c_mark_varargs ();
782 if (pedantic)
783 pedwarn ("ISO C does not permit use of `varargs.h'"); }
784 ;
786 /* The following are analogous to lineno_decl, decls and decl
787 except that they do not allow nested functions.
788 They are used for old-style parm decls. */
789 lineno_datadecl:
790 save_filename save_lineno datadecl
791 { }
792 ;
794 datadecls:
795 lineno_datadecl
796 | errstmt
797 | datadecls lineno_datadecl
798 | lineno_datadecl errstmt
799 ;
801 /* We don't allow prefix attributes here because they cause reduce/reduce
802 conflicts: we can't know whether we're parsing a function decl with
803 attribute suffix, or function defn with attribute prefix on first old
804 style parm. */
805 datadecl:
806 declspecs_ts_nosa setspecs initdecls ';'
807 { current_declspecs = TREE_VALUE (declspec_stack);
808 prefix_attributes = TREE_PURPOSE (declspec_stack);
809 declspec_stack = TREE_CHAIN (declspec_stack); }
810 | declspecs_nots_nosa setspecs notype_initdecls ';'
811 { current_declspecs = TREE_VALUE (declspec_stack);
812 prefix_attributes = TREE_PURPOSE (declspec_stack);
813 declspec_stack = TREE_CHAIN (declspec_stack); }
814 | declspecs_ts_nosa ';'
815 { shadow_tag_warned ($1, 1);
816 pedwarn ("empty declaration"); }
817 | declspecs_nots_nosa ';'
818 { pedwarn ("empty declaration"); }
819 ;
821 /* This combination which saves a lineno before a decl
822 is the normal thing to use, rather than decl itself.
823 This is to avoid shift/reduce conflicts in contexts
824 where statement labels are allowed. */
825 lineno_decl:
826 save_filename save_lineno decl
827 { }
828 ;
830 /* records the type and storage class specs to use for processing
831 the declarators that follow.
832 Maintains a stack of outer-level values of current_declspecs,
833 for the sake of parm declarations nested in function declarators. */
834 setspecs: /* empty */
835 { pending_xref_error ();
836 declspec_stack = tree_cons (prefix_attributes,
837 current_declspecs,
838 declspec_stack);
839 split_specs_attrs ($<ttype>0,
840 ¤t_declspecs, &prefix_attributes); }
841 ;
843 /* ??? Yuck. See maybe_setattrs. */
844 setattrs: /* empty */
845 { prefix_attributes = chainon (prefix_attributes, $<ttype>0); }
846 ;
848 maybe_setattrs:
849 /* ??? Yuck. setattrs is a quick hack. We can't use
850 prefix_attributes because $1 only applies to this
851 declarator. We assume setspecs has already been done.
852 setattrs also avoids 5 reduce/reduce conflicts (otherwise multiple
853 attributes could be recognized here or in `attributes').
854 Properly attributes ought to be able to apply to any level of
855 nested declarator, but the necessary compiler support isn't
856 present, so the attributes apply to a declaration (which may be
857 nested). */
858 maybe_attribute setattrs
859 ;
861 decl:
862 declspecs_ts setspecs initdecls ';'
863 { current_declspecs = TREE_VALUE (declspec_stack);
864 prefix_attributes = TREE_PURPOSE (declspec_stack);
865 declspec_stack = TREE_CHAIN (declspec_stack); }
866 | declspecs_nots setspecs notype_initdecls ';'
867 { current_declspecs = TREE_VALUE (declspec_stack);
868 prefix_attributes = TREE_PURPOSE (declspec_stack);
869 declspec_stack = TREE_CHAIN (declspec_stack); }
870 | declspecs_ts setspecs nested_function
871 { current_declspecs = TREE_VALUE (declspec_stack);
872 prefix_attributes = TREE_PURPOSE (declspec_stack);
873 declspec_stack = TREE_CHAIN (declspec_stack); }
874 | declspecs_nots setspecs notype_nested_function
875 { current_declspecs = TREE_VALUE (declspec_stack);
876 prefix_attributes = TREE_PURPOSE (declspec_stack);
877 declspec_stack = TREE_CHAIN (declspec_stack); }
878 | declspecs ';'
879 { shadow_tag ($1); }
880 | extension decl
881 { RESTORE_WARN_FLAGS ($1); }
882 ;
884 /* A list of declaration specifiers. These are:
886 - Storage class specifiers (SCSPEC), which for GCC currently include
887 function specifiers ("inline").
889 - Type specifiers (typespec_*).
891 - Type qualifiers (TYPE_QUAL).
893 - Attribute specifier lists (attributes).
895 These are stored as a TREE_LIST; the head of the list is the last
896 item in the specifier list. Each entry in the list has either a
897 TREE_PURPOSE that is an attribute specifier list, or a TREE_VALUE that
898 is a single other specifier or qualifier; and a TREE_CHAIN that is the
899 rest of the list. TREE_STATIC is set on the list if something other
900 than a storage class specifier or attribute has been seen; this is used
901 to warn for the obsolescent usage of storage class specifiers other than
902 at the start of the list. (Doing this properly would require function
903 specifiers to be handled separately from storage class specifiers.)
905 The various cases below are classified according to:
907 (a) Whether a storage class specifier is included or not; some
908 places in the grammar disallow storage class specifiers (_sc or _nosc).
910 (b) Whether a type specifier has been seen; after a type specifier,
911 a typedef name is an identifier to redeclare (_ts or _nots).
913 (c) Whether the list starts with an attribute; in certain places,
914 the grammar requires specifiers that don't start with an attribute
915 (_sa or _nosa).
917 (d) Whether the list ends with an attribute (or a specifier such that
918 any following attribute would have been parsed as part of that specifier);
919 this avoids shift-reduce conflicts in the parsing of attributes
920 (_ea or _noea).
922 TODO:
924 (i) Distinguish between function specifiers and storage class specifiers,
925 at least for the purpose of warnings about obsolescent usage.
927 (ii) Halve the number of productions here by eliminating the _sc/_nosc
928 distinction and instead checking where required that storage class
929 specifiers aren't present. */
931 /* Declspecs which contain at least one type specifier or typedef name.
932 (Just `const' or `volatile' is not enough.)
933 A typedef'd name following these is taken as a name to be declared.
934 Declspecs have a non-NULL TREE_VALUE, attributes do not. */
936 declspecs_nosc_nots_nosa_noea:
937 TYPE_QUAL
938 { $$ = tree_cons (NULL_TREE, $1, NULL_TREE);
939 TREE_STATIC ($$) = 1; }
940 | declspecs_nosc_nots_nosa_noea TYPE_QUAL
941 { $$ = tree_cons (NULL_TREE, $2, $1);
942 TREE_STATIC ($$) = 1; }
943 | declspecs_nosc_nots_nosa_ea TYPE_QUAL
944 { $$ = tree_cons (NULL_TREE, $2, $1);
945 TREE_STATIC ($$) = 1; }
946 ;
948 declspecs_nosc_nots_nosa_ea:
949 declspecs_nosc_nots_nosa_noea attributes
950 { $$ = tree_cons ($2, NULL_TREE, $1);
951 TREE_STATIC ($$) = TREE_STATIC ($1); }
952 ;
954 declspecs_nosc_nots_sa_noea:
955 declspecs_nosc_nots_sa_noea TYPE_QUAL
956 { $$ = tree_cons (NULL_TREE, $2, $1);
957 TREE_STATIC ($$) = 1; }
958 | declspecs_nosc_nots_sa_ea TYPE_QUAL
959 { $$ = tree_cons (NULL_TREE, $2, $1);
960 TREE_STATIC ($$) = 1; }
961 ;
963 declspecs_nosc_nots_sa_ea:
964 attributes
965 { $$ = tree_cons ($1, NULL_TREE, NULL_TREE);
966 TREE_STATIC ($$) = 0; }
967 | declspecs_nosc_nots_sa_noea attributes
968 { $$ = tree_cons ($2, NULL_TREE, $1);
969 TREE_STATIC ($$) = TREE_STATIC ($1); }
970 ;
972 declspecs_nosc_ts_nosa_noea:
973 typespec_nonattr
974 { $$ = tree_cons (NULL_TREE, $1, NULL_TREE);
975 TREE_STATIC ($$) = 1; }
976 | declspecs_nosc_ts_nosa_noea TYPE_QUAL
977 { $$ = tree_cons (NULL_TREE, $2, $1);
978 TREE_STATIC ($$) = 1; }
979 | declspecs_nosc_ts_nosa_ea TYPE_QUAL
980 { $$ = tree_cons (NULL_TREE, $2, $1);
981 TREE_STATIC ($$) = 1; }
982 | declspecs_nosc_ts_nosa_noea typespec_reserved_nonattr
983 { $$ = tree_cons (NULL_TREE, $2, $1);
984 TREE_STATIC ($$) = 1; }
985 | declspecs_nosc_ts_nosa_ea typespec_reserved_nonattr
986 { $$ = tree_cons (NULL_TREE, $2, $1);
987 TREE_STATIC ($$) = 1; }
988 | declspecs_nosc_nots_nosa_noea typespec_nonattr
989 { $$ = tree_cons (NULL_TREE, $2, $1);
990 TREE_STATIC ($$) = 1; }
991 | declspecs_nosc_nots_nosa_ea typespec_nonattr
992 { $$ = tree_cons (NULL_TREE, $2, $1);
993 TREE_STATIC ($$) = 1; }
994 ;
996 declspecs_nosc_ts_nosa_ea:
997 typespec_attr
998 { $$ = tree_cons (NULL_TREE, $1, NULL_TREE);
999 TREE_STATIC ($$) = 1; }
1000 | declspecs_nosc_ts_nosa_noea attributes
1001 { $$ = tree_cons ($2, NULL_TREE, $1);
1002 TREE_STATIC ($$) = TREE_STATIC ($1); }
1003 | declspecs_nosc_ts_nosa_noea typespec_reserved_attr
1004 { $$ = tree_cons (NULL_TREE, $2, $1);
1005 TREE_STATIC ($$) = 1; }
1006 | declspecs_nosc_ts_nosa_ea typespec_reserved_attr
1007 { $$ = tree_cons (NULL_TREE, $2, $1);
1008 TREE_STATIC ($$) = 1; }
1009 | declspecs_nosc_nots_nosa_noea typespec_attr
1010 { $$ = tree_cons (NULL_TREE, $2, $1);
1011 TREE_STATIC ($$) = 1; }
1012 | declspecs_nosc_nots_nosa_ea typespec_attr
1013 { $$ = tree_cons (NULL_TREE, $2, $1);
1014 TREE_STATIC ($$) = 1; }
1015 ;
1017 declspecs_nosc_ts_sa_noea:
1018 declspecs_nosc_ts_sa_noea TYPE_QUAL
1019 { $$ = tree_cons (NULL_TREE, $2, $1);
1020 TREE_STATIC ($$) = 1; }
1021 | declspecs_nosc_ts_sa_ea TYPE_QUAL
1022 { $$ = tree_cons (NULL_TREE, $2, $1);
1023 TREE_STATIC ($$) = 1; }
1024 | declspecs_nosc_ts_sa_noea typespec_reserved_nonattr
1025 { $$ = tree_cons (NULL_TREE, $2, $1);
1026 TREE_STATIC ($$) = 1; }
1027 | declspecs_nosc_ts_sa_ea typespec_reserved_nonattr
1028 { $$ = tree_cons (NULL_TREE, $2, $1);
1029 TREE_STATIC ($$) = 1; }
1030 | declspecs_nosc_nots_sa_noea typespec_nonattr
1031 { $$ = tree_cons (NULL_TREE, $2, $1);
1032 TREE_STATIC ($$) = 1; }
1033 | declspecs_nosc_nots_sa_ea typespec_nonattr
1034 { $$ = tree_cons (NULL_TREE, $2, $1);
1035 TREE_STATIC ($$) = 1; }
1036 ;
1038 declspecs_nosc_ts_sa_ea:
1039 declspecs_nosc_ts_sa_noea attributes
1040 { $$ = tree_cons ($2, NULL_TREE, $1);
1041 TREE_STATIC ($$) = TREE_STATIC ($1); }
1042 | declspecs_nosc_ts_sa_noea typespec_reserved_attr
1043 { $$ = tree_cons (NULL_TREE, $2, $1);
1044 TREE_STATIC ($$) = 1; }
1045 | declspecs_nosc_ts_sa_ea typespec_reserved_attr
1046 { $$ = tree_cons (NULL_TREE, $2, $1);
1047 TREE_STATIC ($$) = 1; }
1048 | declspecs_nosc_nots_sa_noea typespec_attr
1049 { $$ = tree_cons (NULL_TREE, $2, $1);
1050 TREE_STATIC ($$) = 1; }
1051 | declspecs_nosc_nots_sa_ea typespec_attr
1052 { $$ = tree_cons (NULL_TREE, $2, $1);
1053 TREE_STATIC ($$) = 1; }
1054 ;
1056 declspecs_sc_nots_nosa_noea:
1057 SCSPEC
1058 { $$ = tree_cons (NULL_TREE, $1, NULL_TREE);
1059 TREE_STATIC ($$) = 0; }
1060 | declspecs_sc_nots_nosa_noea TYPE_QUAL
1061 { $$ = tree_cons (NULL_TREE, $2, $1);
1062 TREE_STATIC ($$) = 1; }
1063 | declspecs_sc_nots_nosa_ea TYPE_QUAL
1064 { $$ = tree_cons (NULL_TREE, $2, $1);
1065 TREE_STATIC ($$) = 1; }
1066 | declspecs_nosc_nots_nosa_noea SCSPEC
1067 { if (extra_warnings && TREE_STATIC ($1))
1068 warning ("`%s' is not at beginning of declaration",
1069 IDENTIFIER_POINTER ($2));
1070 $$ = tree_cons (NULL_TREE, $2, $1);
1071 TREE_STATIC ($$) = TREE_STATIC ($1); }
1072 | declspecs_nosc_nots_nosa_ea SCSPEC
1073 { if (extra_warnings && TREE_STATIC ($1))
1074 warning ("`%s' is not at beginning of declaration",
1075 IDENTIFIER_POINTER ($2));
1076 $$ = tree_cons (NULL_TREE, $2, $1);
1077 TREE_STATIC ($$) = TREE_STATIC ($1); }
1078 | declspecs_sc_nots_nosa_noea SCSPEC
1079 { if (extra_warnings && TREE_STATIC ($1))
1080 warning ("`%s' is not at beginning of declaration",
1081 IDENTIFIER_POINTER ($2));
1082 $$ = tree_cons (NULL_TREE, $2, $1);
1083 TREE_STATIC ($$) = TREE_STATIC ($1); }
1084 | declspecs_sc_nots_nosa_ea SCSPEC
1085 { if (extra_warnings && TREE_STATIC ($1))
1086 warning ("`%s' is not at beginning of declaration",
1087 IDENTIFIER_POINTER ($2));
1088 $$ = tree_cons (NULL_TREE, $2, $1);
1089 TREE_STATIC ($$) = TREE_STATIC ($1); }
1090 ;
1092 declspecs_sc_nots_nosa_ea:
1093 declspecs_sc_nots_nosa_noea attributes
1094 { $$ = tree_cons ($2, NULL_TREE, $1);
1095 TREE_STATIC ($$) = TREE_STATIC ($1); }
1096 ;
1098 declspecs_sc_nots_sa_noea:
1099 declspecs_sc_nots_sa_noea TYPE_QUAL
1100 { $$ = tree_cons (NULL_TREE, $2, $1);
1101 TREE_STATIC ($$) = 1; }
1102 | declspecs_sc_nots_sa_ea TYPE_QUAL
1103 { $$ = tree_cons (NULL_TREE, $2, $1);
1104 TREE_STATIC ($$) = 1; }
1105 | declspecs_nosc_nots_sa_noea SCSPEC
1106 { if (extra_warnings && TREE_STATIC ($1))
1107 warning ("`%s' is not at beginning of declaration",
1108 IDENTIFIER_POINTER ($2));
1109 $$ = tree_cons (NULL_TREE, $2, $1);
1110 TREE_STATIC ($$) = TREE_STATIC ($1); }
1111 | declspecs_nosc_nots_sa_ea SCSPEC
1112 { if (extra_warnings && TREE_STATIC ($1))
1113 warning ("`%s' is not at beginning of declaration",
1114 IDENTIFIER_POINTER ($2));
1115 $$ = tree_cons (NULL_TREE, $2, $1);
1116 TREE_STATIC ($$) = TREE_STATIC ($1); }
1117 | declspecs_sc_nots_sa_noea SCSPEC
1118 { if (extra_warnings && TREE_STATIC ($1))
1119 warning ("`%s' is not at beginning of declaration",
1120 IDENTIFIER_POINTER ($2));
1121 $$ = tree_cons (NULL_TREE, $2, $1);
1122 TREE_STATIC ($$) = TREE_STATIC ($1); }
1123 | declspecs_sc_nots_sa_ea SCSPEC
1124 { if (extra_warnings && TREE_STATIC ($1))
1125 warning ("`%s' is not at beginning of declaration",
1126 IDENTIFIER_POINTER ($2));
1127 $$ = tree_cons (NULL_TREE, $2, $1);
1128 TREE_STATIC ($$) = TREE_STATIC ($1); }
1129 ;
1131 declspecs_sc_nots_sa_ea:
1132 declspecs_sc_nots_sa_noea attributes
1133 { $$ = tree_cons ($2, NULL_TREE, $1);
1134 TREE_STATIC ($$) = TREE_STATIC ($1); }
1135 ;
1137 declspecs_sc_ts_nosa_noea:
1138 declspecs_sc_ts_nosa_noea TYPE_QUAL
1139 { $$ = tree_cons (NULL_TREE, $2, $1);
1140 TREE_STATIC ($$) = 1; }
1141 | declspecs_sc_ts_nosa_ea TYPE_QUAL
1142 { $$ = tree_cons (NULL_TREE, $2, $1);
1143 TREE_STATIC ($$) = 1; }
1144 | declspecs_sc_ts_nosa_noea typespec_reserved_nonattr
1145 { $$ = tree_cons (NULL_TREE, $2, $1);
1146 TREE_STATIC ($$) = 1; }
1147 | declspecs_sc_ts_nosa_ea typespec_reserved_nonattr
1148 { $$ = tree_cons (NULL_TREE, $2, $1);
1149 TREE_STATIC ($$) = 1; }
1150 | declspecs_sc_nots_nosa_noea typespec_nonattr
1151 { $$ = tree_cons (NULL_TREE, $2, $1);
1152 TREE_STATIC ($$) = 1; }
1153 | declspecs_sc_nots_nosa_ea typespec_nonattr
1154 { $$ = tree_cons (NULL_TREE, $2, $1);
1155 TREE_STATIC ($$) = 1; }
1156 | declspecs_nosc_ts_nosa_noea SCSPEC
1157 { if (extra_warnings && TREE_STATIC ($1))
1158 warning ("`%s' is not at beginning of declaration",
1159 IDENTIFIER_POINTER ($2));
1160 $$ = tree_cons (NULL_TREE, $2, $1);
1161 TREE_STATIC ($$) = TREE_STATIC ($1); }
1162 | declspecs_nosc_ts_nosa_ea SCSPEC
1163 { if (extra_warnings && TREE_STATIC ($1))
1164 warning ("`%s' is not at beginning of declaration",
1165 IDENTIFIER_POINTER ($2));
1166 $$ = tree_cons (NULL_TREE, $2, $1);
1167 TREE_STATIC ($$) = TREE_STATIC ($1); }
1168 | declspecs_sc_ts_nosa_noea SCSPEC
1169 { if (extra_warnings && TREE_STATIC ($1))
1170 warning ("`%s' is not at beginning of declaration",
1171 IDENTIFIER_POINTER ($2));
1172 $$ = tree_cons (NULL_TREE, $2, $1);
1173 TREE_STATIC ($$) = TREE_STATIC ($1); }
1174 | declspecs_sc_ts_nosa_ea SCSPEC
1175 { if (extra_warnings && TREE_STATIC ($1))
1176 warning ("`%s' is not at beginning of declaration",
1177 IDENTIFIER_POINTER ($2));
1178 $$ = tree_cons (NULL_TREE, $2, $1);
1179 TREE_STATIC ($$) = TREE_STATIC ($1); }
1180 ;
1182 declspecs_sc_ts_nosa_ea:
1183 declspecs_sc_ts_nosa_noea attributes
1184 { $$ = tree_cons ($2, NULL_TREE, $1);
1185 TREE_STATIC ($$) = TREE_STATIC ($1); }
1186 | declspecs_sc_ts_nosa_noea typespec_reserved_attr
1187 { $$ = tree_cons (NULL_TREE, $2, $1);
1188 TREE_STATIC ($$) = 1; }
1189 | declspecs_sc_ts_nosa_ea typespec_reserved_attr
1190 { $$ = tree_cons (NULL_TREE, $2, $1);
1191 TREE_STATIC ($$) = 1; }
1192 | declspecs_sc_nots_nosa_noea typespec_attr
1193 { $$ = tree_cons (NULL_TREE, $2, $1);
1194 TREE_STATIC ($$) = 1; }
1195 | declspecs_sc_nots_nosa_ea typespec_attr
1196 { $$ = tree_cons (NULL_TREE, $2, $1);
1197 TREE_STATIC ($$) = 1; }
1198 ;
1200 declspecs_sc_ts_sa_noea:
1201 declspecs_sc_ts_sa_noea TYPE_QUAL
1202 { $$ = tree_cons (NULL_TREE, $2, $1);
1203 TREE_STATIC ($$) = 1; }
1204 | declspecs_sc_ts_sa_ea TYPE_QUAL
1205 { $$ = tree_cons (NULL_TREE, $2, $1);
1206 TREE_STATIC ($$) = 1; }
1207 | declspecs_sc_ts_sa_noea typespec_reserved_nonattr
1208 { $$ = tree_cons (NULL_TREE, $2, $1);
1209 TREE_STATIC ($$) = 1; }
1210 | declspecs_sc_ts_sa_ea typespec_reserved_nonattr
1211 { $$ = tree_cons (NULL_TREE, $2, $1);
1212 TREE_STATIC ($$) = 1; }
1213 | declspecs_sc_nots_sa_noea typespec_nonattr
1214 { $$ = tree_cons (NULL_TREE, $2, $1);
1215 TREE_STATIC ($$) = 1; }
1216 | declspecs_sc_nots_sa_ea typespec_nonattr
1217 { $$ = tree_cons (NULL_TREE, $2, $1);
1218 TREE_STATIC ($$) = 1; }
1219 | declspecs_nosc_ts_sa_noea SCSPEC
1220 { if (extra_warnings && TREE_STATIC ($1))
1221 warning ("`%s' is not at beginning of declaration",
1222 IDENTIFIER_POINTER ($2));
1223 $$ = tree_cons (NULL_TREE, $2, $1);
1224 TREE_STATIC ($$) = TREE_STATIC ($1); }
1225 | declspecs_nosc_ts_sa_ea SCSPEC
1226 { if (extra_warnings && TREE_STATIC ($1))
1227 warning ("`%s' is not at beginning of declaration",
1228 IDENTIFIER_POINTER ($2));
1229 $$ = tree_cons (NULL_TREE, $2, $1);
1230 TREE_STATIC ($$) = TREE_STATIC ($1); }
1231 | declspecs_sc_ts_sa_noea SCSPEC
1232 { if (extra_warnings && TREE_STATIC ($1))
1233 warning ("`%s' is not at beginning of declaration",
1234 IDENTIFIER_POINTER ($2));
1235 $$ = tree_cons (NULL_TREE, $2, $1);
1236 TREE_STATIC ($$) = TREE_STATIC ($1); }
1237 | declspecs_sc_ts_sa_ea SCSPEC
1238 { if (extra_warnings && TREE_STATIC ($1))
1239 warning ("`%s' is not at beginning of declaration",
1240 IDENTIFIER_POINTER ($2));
1241 $$ = tree_cons (NULL_TREE, $2, $1);
1242 TREE_STATIC ($$) = TREE_STATIC ($1); }
1243 ;
1245 declspecs_sc_ts_sa_ea:
1246 declspecs_sc_ts_sa_noea attributes
1247 { $$ = tree_cons ($2, NULL_TREE, $1);
1248 TREE_STATIC ($$) = TREE_STATIC ($1); }
1249 | declspecs_sc_ts_sa_noea typespec_reserved_attr
1250 { $$ = tree_cons (NULL_TREE, $2, $1);
1251 TREE_STATIC ($$) = 1; }
1252 | declspecs_sc_ts_sa_ea typespec_reserved_attr
1253 { $$ = tree_cons (NULL_TREE, $2, $1);
1254 TREE_STATIC ($$) = 1; }
1255 | declspecs_sc_nots_sa_noea typespec_attr
1256 { $$ = tree_cons (NULL_TREE, $2, $1);
1257 TREE_STATIC ($$) = 1; }
1258 | declspecs_sc_nots_sa_ea typespec_attr
1259 { $$ = tree_cons (NULL_TREE, $2, $1);
1260 TREE_STATIC ($$) = 1; }
1261 ;
1263 /* Particular useful classes of declspecs. */
1264 declspecs_ts:
1265 declspecs_nosc_ts_nosa_noea
1266 | declspecs_nosc_ts_nosa_ea
1267 | declspecs_nosc_ts_sa_noea
1268 | declspecs_nosc_ts_sa_ea
1269 | declspecs_sc_ts_nosa_noea
1270 | declspecs_sc_ts_nosa_ea
1271 | declspecs_sc_ts_sa_noea
1272 | declspecs_sc_ts_sa_ea
1273 ;
1275 declspecs_nots:
1276 declspecs_nosc_nots_nosa_noea
1277 | declspecs_nosc_nots_nosa_ea
1278 | declspecs_nosc_nots_sa_noea
1279 | declspecs_nosc_nots_sa_ea
1280 | declspecs_sc_nots_nosa_noea
1281 | declspecs_sc_nots_nosa_ea
1282 | declspecs_sc_nots_sa_noea
1283 | declspecs_sc_nots_sa_ea
1284 ;
1286 declspecs_ts_nosa:
1287 declspecs_nosc_ts_nosa_noea
1288 | declspecs_nosc_ts_nosa_ea
1289 | declspecs_sc_ts_nosa_noea
1290 | declspecs_sc_ts_nosa_ea
1291 ;
1293 declspecs_nots_nosa:
1294 declspecs_nosc_nots_nosa_noea
1295 | declspecs_nosc_nots_nosa_ea
1296 | declspecs_sc_nots_nosa_noea
1297 | declspecs_sc_nots_nosa_ea
1298 ;
1300 declspecs_nosc_ts:
1301 declspecs_nosc_ts_nosa_noea
1302 | declspecs_nosc_ts_nosa_ea
1303 | declspecs_nosc_ts_sa_noea
1304 | declspecs_nosc_ts_sa_ea
1305 ;
1307 declspecs_nosc_nots:
1308 declspecs_nosc_nots_nosa_noea
1309 | declspecs_nosc_nots_nosa_ea
1310 | declspecs_nosc_nots_sa_noea
1311 | declspecs_nosc_nots_sa_ea
1312 ;
1314 declspecs_nosc:
1315 declspecs_nosc_ts_nosa_noea
1316 | declspecs_nosc_ts_nosa_ea
1317 | declspecs_nosc_ts_sa_noea
1318 | declspecs_nosc_ts_sa_ea
1319 | declspecs_nosc_nots_nosa_noea
1320 | declspecs_nosc_nots_nosa_ea
1321 | declspecs_nosc_nots_sa_noea
1322 | declspecs_nosc_nots_sa_ea
1323 ;
1325 declspecs:
1326 declspecs_nosc_nots_nosa_noea
1327 | declspecs_nosc_nots_nosa_ea
1328 | declspecs_nosc_nots_sa_noea
1329 | declspecs_nosc_nots_sa_ea
1330 | declspecs_nosc_ts_nosa_noea
1331 | declspecs_nosc_ts_nosa_ea
1332 | declspecs_nosc_ts_sa_noea
1333 | declspecs_nosc_ts_sa_ea
1334 | declspecs_sc_nots_nosa_noea
1335 | declspecs_sc_nots_nosa_ea
1336 | declspecs_sc_nots_sa_noea
1337 | declspecs_sc_nots_sa_ea
1338 | declspecs_sc_ts_nosa_noea
1339 | declspecs_sc_ts_nosa_ea
1340 | declspecs_sc_ts_sa_noea
1341 | declspecs_sc_ts_sa_ea
1342 ;
1344 /* A (possibly empty) sequence of type qualifiers and attributes, to be
1345 followed by the effect of setattrs if any attributes were present. */
1346 maybe_type_quals_setattrs:
1347 /* empty */
1348 { $$ = NULL_TREE; }
1349 | declspecs_nosc_nots
1350 { tree specs, attrs;
1351 split_specs_attrs ($1, &specs, &attrs);
1352 /* ??? Yuck. See maybe_setattrs. */
1353 if (attrs != NULL_TREE)
1354 prefix_attributes = chainon (prefix_attributes, attrs);
1355 $$ = specs; }
1356 ;
1358 /* A type specifier (but not a type qualifier).
1359 Once we have seen one of these in a declaration,
1360 if a typedef name appears then it is being redeclared.
1362 The _reserved versions start with a reserved word and may appear anywhere
1363 in the declaration specifiers; the _nonreserved versions may only
1364 appear before any other type specifiers, and after that are (if names)
1365 being redeclared.
1367 FIXME: should the _nonreserved version be restricted to names being
1368 redeclared only? The other entries there relate only the GNU extensions
1369 and Objective C, and are historically parsed thus, and don't make sense
1370 after other type specifiers, but it might be cleaner to count them as
1371 _reserved.
1373 _attr means: specifiers that either end with attributes,
1374 or are such that any following attributes would
1375 be parsed as part of the specifier.
1377 _nonattr: specifiers. */
1379 typespec_nonattr:
1380 typespec_reserved_nonattr
1381 | typespec_nonreserved_nonattr
1382 ;
1384 typespec_attr:
1385 typespec_reserved_attr
1386 ;
1388 typespec_reserved_nonattr:
1389 TYPESPEC
1390 | structsp_nonattr
1391 ;
1393 typespec_reserved_attr:
1394 structsp_attr
1395 ;
1397 typespec_nonreserved_nonattr:
1398 TYPENAME
1399 { /* For a typedef name, record the meaning, not the name.
1400 In case of `foo foo, bar;'. */
1401 $$ = lookup_name ($1); }
1402 ifobjc
1403 | CLASSNAME protocolrefs
1404 { $$ = get_static_reference ($1, $2); }
1405 | OBJECTNAME protocolrefs
1406 { $$ = get_object_reference ($2); }
1408 /* Make "<SomeProtocol>" equivalent to "id <SomeProtocol>"
1409 - nisse@lysator.liu.se */
1410 | non_empty_protocolrefs
1411 { $$ = get_object_reference ($1); }
1412 end ifobjc
1413 | TYPEOF '(' expr ')'
1414 { $$ = TREE_TYPE ($3); }
1415 | TYPEOF '(' typename ')'
1416 { $$ = groktypename ($3); }
1417 ;
1419 /* typespec_nonreserved_attr does not exist. */
1421 initdecls:
1422 initdcl
1423 | initdecls ',' maybe_setattrs initdcl
1424 ;
1426 notype_initdecls:
1427 notype_initdcl
1428 | notype_initdecls ',' maybe_setattrs notype_initdcl
1429 ;
1431 maybeasm:
1432 /* empty */
1433 { $$ = NULL_TREE; }
1434 | ASM_KEYWORD '(' string ')'
1435 { if (TREE_CHAIN ($3)) $3 = combine_strings ($3);
1436 $$ = $3;
1437 }
1438 ;
1440 initdcl:
1441 declarator maybeasm maybe_attribute '='
1442 { $<ttype>$ = start_decl ($1, current_declspecs, 1,
1443 $3, prefix_attributes);
1444 start_init ($<ttype>$, $2, global_bindings_p ()); }
1445 init
1446 /* Note how the declaration of the variable is in effect while its init is parsed! */
1447 { finish_init ();
1448 finish_decl ($<ttype>5, $6, $2); }
1449 | declarator maybeasm maybe_attribute
1450 { tree d = start_decl ($1, current_declspecs, 0,
1451 $3, prefix_attributes);
1452 finish_decl (d, NULL_TREE, $2);
1453 }
1454 ;
1456 notype_initdcl:
1457 notype_declarator maybeasm maybe_attribute '='
1458 { $<ttype>$ = start_decl ($1, current_declspecs, 1,
1459 $3, prefix_attributes);
1460 start_init ($<ttype>$, $2, global_bindings_p ()); }
1461 init
1462 /* Note how the declaration of the variable is in effect while its init is parsed! */
1463 { finish_init ();
1464 finish_decl ($<ttype>5, $6, $2); }
1465 | notype_declarator maybeasm maybe_attribute
1466 { tree d = start_decl ($1, current_declspecs, 0,
1467 $3, prefix_attributes);
1468 finish_decl (d, NULL_TREE, $2); }
1469 ;
1470 /* the * rules are dummies to accept the Apollo extended syntax
1471 so that the header files compile. */
1472 maybe_attribute:
1473 /* empty */
1474 { $$ = NULL_TREE; }
1475 | attributes
1476 { $$ = $1; }
1477 ;
1479 attributes:
1480 attribute
1481 { $$ = $1; }
1482 | attributes attribute
1483 { $$ = chainon ($1, $2); }
1484 ;
1486 attribute:
1487 ATTRIBUTE '(' '(' attribute_list ')' ')'
1488 { $$ = $4; }
1489 ;
1491 attribute_list:
1492 attrib
1493 { $$ = $1; }
1494 | attribute_list ',' attrib
1495 { $$ = chainon ($1, $3); }
1496 ;
1498 attrib:
1499 /* empty */
1500 { $$ = NULL_TREE; }
1501 | any_word
1502 { $$ = build_tree_list ($1, NULL_TREE); }
1503 | any_word '(' IDENTIFIER ')'
1504 { $$ = build_tree_list ($1, build_tree_list (NULL_TREE, $3)); }
1505 | any_word '(' IDENTIFIER ',' nonnull_exprlist ')'
1506 { $$ = build_tree_list ($1, tree_cons (NULL_TREE, $3, $5)); }
1507 | any_word '(' exprlist ')'
1508 { $$ = build_tree_list ($1, $3); }
1509 ;
1511 /* This still leaves out most reserved keywords,
1512 shouldn't we include them? */
1514 any_word:
1515 identifier
1516 | SCSPEC
1517 | TYPESPEC
1518 | TYPE_QUAL
1519 ;
1520 \f
1521 /* Initializers. `init' is the entry point. */
1523 init:
1524 expr_no_commas
1525 | '{'
1526 { really_start_incremental_init (NULL_TREE); }
1527 initlist_maybe_comma '}'
1528 { $$ = pop_init_level (0); }
1529 | error
1530 { $$ = error_mark_node; }
1531 ;
1533 /* `initlist_maybe_comma' is the guts of an initializer in braces. */
1534 initlist_maybe_comma:
1535 /* empty */
1536 { if (pedantic)
1537 pedwarn ("ISO C forbids empty initializer braces"); }
1538 | initlist1 maybecomma
1539 ;
1541 initlist1:
1542 initelt
1543 | initlist1 ',' initelt
1544 ;
1546 /* `initelt' is a single element of an initializer.
1547 It may use braces. */
1548 initelt:
1549 designator_list '=' initval
1550 { if (pedantic && ! flag_isoc99)
1551 pedwarn ("ISO C89 forbids specifying subobject to initialize"); }
1552 | designator initval
1553 { if (pedantic)
1554 pedwarn ("obsolete use of designated initializer without `='"); }
1555 | identifier ':'
1556 { set_init_label ($1);
1557 if (pedantic)
1558 pedwarn ("obsolete use of designated initializer with `:'"); }
1559 initval
1560 | initval
1561 ;
1563 initval:
1564 '{'
1565 { push_init_level (0); }
1566 initlist_maybe_comma '}'
1567 { process_init_element (pop_init_level (0)); }
1568 | expr_no_commas
1569 { process_init_element ($1); }
1570 | error
1571 ;
1573 designator_list:
1574 designator
1575 | designator_list designator
1576 ;
1578 designator:
1579 '.' identifier
1580 { set_init_label ($2); }
1581 /* These are for labeled elements. The syntax for an array element
1582 initializer conflicts with the syntax for an Objective-C message,
1583 so don't include these productions in the Objective-C grammar. */
1584 ifc
1585 | '[' expr_no_commas ELLIPSIS expr_no_commas ']'
1586 { set_init_index ($2, $4);
1587 if (pedantic)
1588 pedwarn ("ISO C forbids specifying range of elements to initialize"); }
1589 | '[' expr_no_commas ']'
1590 { set_init_index ($2, NULL_TREE); }
1591 end ifc
1592 ;
1593 \f
1594 nested_function:
1595 declarator
1596 { if (pedantic)
1597 pedwarn ("ISO C forbids nested functions");
1599 push_function_context ();
1600 if (! start_function (current_declspecs, $1,
1601 prefix_attributes, NULL_TREE))
1602 {
1603 pop_function_context ();
1604 YYERROR1;
1605 }
1606 }
1607 old_style_parm_decls
1608 { store_parm_decls (); }
1609 /* This used to use compstmt_or_error.
1610 That caused a bug with input `f(g) int g {}',
1611 where the use of YYERROR1 above caused an error
1612 which then was handled by compstmt_or_error.
1613 There followed a repeated execution of that same rule,
1614 which called YYERROR1 again, and so on. */
1615 save_filename save_lineno compstmt
1616 { tree decl = current_function_decl;
1617 DECL_SOURCE_FILE (decl) = $5;
1618 DECL_SOURCE_LINE (decl) = $6;
1619 finish_function (1);
1620 pop_function_context ();
1621 add_decl_stmt (decl); }
1622 ;
1624 notype_nested_function:
1625 notype_declarator
1626 { if (pedantic)
1627 pedwarn ("ISO C forbids nested functions");
1629 push_function_context ();
1630 if (! start_function (current_declspecs, $1,
1631 prefix_attributes, NULL_TREE))
1632 {
1633 pop_function_context ();
1634 YYERROR1;
1635 }
1636 }
1637 old_style_parm_decls
1638 { store_parm_decls (); }
1639 /* This used to use compstmt_or_error.
1640 That caused a bug with input `f(g) int g {}',
1641 where the use of YYERROR1 above caused an error
1642 which then was handled by compstmt_or_error.
1643 There followed a repeated execution of that same rule,
1644 which called YYERROR1 again, and so on. */
1645 save_filename save_lineno compstmt
1646 { tree decl = current_function_decl;
1647 DECL_SOURCE_FILE (decl) = $5;
1648 DECL_SOURCE_LINE (decl) = $6;
1649 finish_function (1);
1650 pop_function_context ();
1651 add_decl_stmt (decl); }
1652 ;
1654 /* Any kind of declarator (thus, all declarators allowed
1655 after an explicit typespec). */
1657 declarator:
1658 after_type_declarator
1659 | notype_declarator
1660 ;
1662 /* A declarator that is allowed only after an explicit typespec. */
1664 after_type_declarator:
1665 '(' maybe_setattrs after_type_declarator ')'
1666 { $$ = $3; }
1667 | after_type_declarator '(' parmlist_or_identifiers %prec '.'
1668 { $$ = build_nt (CALL_EXPR, $1, $3, NULL_TREE); }
1669 /* | after_type_declarator '(' error ')' %prec '.'
1670 { $$ = build_nt (CALL_EXPR, $1, NULL_TREE, NULL_TREE);
1671 poplevel (0, 0, 0); } */
1672 | after_type_declarator array_declarator %prec '.'
1673 { $$ = set_array_declarator_type ($2, $1, 0); }
1674 | '*' maybe_type_quals_setattrs after_type_declarator %prec UNARY
1675 { $$ = make_pointer_declarator ($2, $3); }
1676 | TYPENAME
1677 ifobjc
1678 | OBJECTNAME
1679 end ifobjc
1680 ;
1682 /* Kinds of declarator that can appear in a parameter list
1683 in addition to notype_declarator. This is like after_type_declarator
1684 but does not allow a typedef name in parentheses as an identifier
1685 (because it would conflict with a function with that typedef as arg). */
1686 parm_declarator:
1687 parm_declarator_starttypename
1688 | parm_declarator_nostarttypename
1689 ;
1691 parm_declarator_starttypename:
1692 parm_declarator_starttypename '(' parmlist_or_identifiers %prec '.'
1693 { $$ = build_nt (CALL_EXPR, $1, $3, NULL_TREE); }
1694 /* | parm_declarator_starttypename '(' error ')' %prec '.'
1695 { $$ = build_nt (CALL_EXPR, $1, NULL_TREE, NULL_TREE);
1696 poplevel (0, 0, 0); } */
1697 | parm_declarator_starttypename array_declarator %prec '.'
1698 { $$ = set_array_declarator_type ($2, $1, 0); }
1699 | TYPENAME
1700 ;
1702 parm_declarator_nostarttypename:
1703 parm_declarator_nostarttypename '(' parmlist_or_identifiers %prec '.'
1704 { $$ = build_nt (CALL_EXPR, $1, $3, NULL_TREE); }
1705 /* | parm_declarator_nostarttypename '(' error ')' %prec '.'
1706 { $$ = build_nt (CALL_EXPR, $1, NULL_TREE, NULL_TREE);
1707 poplevel (0, 0, 0); } */
1708 | parm_declarator_nostarttypename array_declarator %prec '.'
1709 { $$ = set_array_declarator_type ($2, $1, 0); }
1710 | '*' maybe_type_quals_setattrs parm_declarator_starttypename %prec UNARY
1711 { $$ = make_pointer_declarator ($2, $3); }
1712 | '*' maybe_type_quals_setattrs parm_declarator_nostarttypename %prec UNARY
1713 { $$ = make_pointer_declarator ($2, $3); }
1714 | '(' maybe_setattrs parm_declarator_nostarttypename ')'
1715 { $$ = $3; }
1716 ;
1718 /* A declarator allowed whether or not there has been
1719 an explicit typespec. These cannot redeclare a typedef-name. */
1721 notype_declarator:
1722 notype_declarator '(' parmlist_or_identifiers %prec '.'
1723 { $$ = build_nt (CALL_EXPR, $1, $3, NULL_TREE); }
1724 /* | notype_declarator '(' error ')' %prec '.'
1725 { $$ = build_nt (CALL_EXPR, $1, NULL_TREE, NULL_TREE);
1726 poplevel (0, 0, 0); } */
1727 | '(' maybe_setattrs notype_declarator ')'
1728 { $$ = $3; }
1729 | '*' maybe_type_quals_setattrs notype_declarator %prec UNARY
1730 { $$ = make_pointer_declarator ($2, $3); }
1731 | notype_declarator array_declarator %prec '.'
1732 { $$ = set_array_declarator_type ($2, $1, 0); }
1733 | IDENTIFIER
1734 ;
1736 struct_head:
1737 STRUCT
1738 { $$ = NULL_TREE; }
1739 | STRUCT attributes
1740 { $$ = $2; }
1741 ;
1743 union_head:
1744 UNION
1745 { $$ = NULL_TREE; }
1746 | UNION attributes
1747 { $$ = $2; }
1748 ;
1750 enum_head:
1751 ENUM
1752 { $$ = NULL_TREE; }
1753 | ENUM attributes
1754 { $$ = $2; }
1755 ;
1757 /* structsp_attr: struct/union/enum specifiers that either
1758 end with attributes, or are such that any following attributes would
1759 be parsed as part of the struct/union/enum specifier.
1761 structsp_nonattr: other struct/union/enum specifiers. */
1763 structsp_attr:
1764 struct_head identifier '{'
1765 { $$ = start_struct (RECORD_TYPE, $2);
1766 /* Start scope of tag before parsing components. */
1767 }
1768 component_decl_list '}' maybe_attribute
1769 { $$ = finish_struct ($<ttype>4, $5, chainon ($1, $7)); }
1770 | struct_head '{' component_decl_list '}' maybe_attribute
1771 { $$ = finish_struct (start_struct (RECORD_TYPE, NULL_TREE),
1772 $3, chainon ($1, $5));
1773 }
1774 | union_head identifier '{'
1775 { $$ = start_struct (UNION_TYPE, $2); }
1776 component_decl_list '}' maybe_attribute
1777 { $$ = finish_struct ($<ttype>4, $5, chainon ($1, $7)); }
1778 | union_head '{' component_decl_list '}' maybe_attribute
1779 { $$ = finish_struct (start_struct (UNION_TYPE, NULL_TREE),
1780 $3, chainon ($1, $5));
1781 }
1782 | enum_head identifier '{'
1783 { $$ = start_enum ($2); }
1784 enumlist maybecomma_warn '}' maybe_attribute
1785 { $$ = finish_enum ($<ttype>4, nreverse ($5),
1786 chainon ($1, $8)); }
1787 | enum_head '{'
1788 { $$ = start_enum (NULL_TREE); }
1789 enumlist maybecomma_warn '}' maybe_attribute
1790 { $$ = finish_enum ($<ttype>3, nreverse ($4),
1791 chainon ($1, $7)); }
1792 ;
1794 structsp_nonattr:
1795 struct_head identifier
1796 { $$ = xref_tag (RECORD_TYPE, $2); }
1797 | union_head identifier
1798 { $$ = xref_tag (UNION_TYPE, $2); }
1799 | enum_head identifier
1800 { $$ = xref_tag (ENUMERAL_TYPE, $2);
1801 /* In ISO C, enumerated types can be referred to
1802 only if already defined. */
1803 if (pedantic && !COMPLETE_TYPE_P ($$))
1804 pedwarn ("ISO C forbids forward references to `enum' types"); }
1805 ;
1807 maybecomma:
1808 /* empty */
1809 | ','
1810 ;
1812 maybecomma_warn:
1813 /* empty */
1814 | ','
1815 { if (pedantic && ! flag_isoc99)
1816 pedwarn ("comma at end of enumerator list"); }
1817 ;
1819 component_decl_list:
1820 component_decl_list2
1821 { $$ = $1; }
1822 | component_decl_list2 component_decl
1823 { $$ = chainon ($1, $2);
1824 pedwarn ("no semicolon at end of struct or union"); }
1825 ;
1827 component_decl_list2: /* empty */
1828 { $$ = NULL_TREE; }
1829 | component_decl_list2 component_decl ';'
1830 { $$ = chainon ($1, $2); }
1831 | component_decl_list2 ';'
1832 { if (pedantic)
1833 pedwarn ("extra semicolon in struct or union specified"); }
1834 ifobjc
1835 /* foo(sizeof(struct{ @defs(ClassName)})); */
1836 | DEFS '(' CLASSNAME ')'
1837 {
1838 tree interface = lookup_interface ($3);
1840 if (interface)
1841 $$ = get_class_ivars (interface);
1842 else
1843 {
1844 error ("Cannot find interface declaration for `%s'",
1845 IDENTIFIER_POINTER ($3));
1846 $$ = NULL_TREE;
1847 }
1848 }
1849 end ifobjc
1850 ;
1852 component_decl:
1853 declspecs_nosc_ts setspecs components
1854 { $$ = $3;
1855 current_declspecs = TREE_VALUE (declspec_stack);
1856 prefix_attributes = TREE_PURPOSE (declspec_stack);
1857 declspec_stack = TREE_CHAIN (declspec_stack); }
1858 | declspecs_nosc_ts setspecs save_filename save_lineno
1859 {
1860 /* Support for unnamed structs or unions as members of
1861 structs or unions (which is [a] useful and [b] supports
1862 MS P-SDK). */
1863 if (pedantic)
1864 pedwarn ("ISO C doesn't support unnamed structs/unions");
1866 $$ = grokfield($3, $4, NULL, current_declspecs, NULL_TREE);
1867 current_declspecs = TREE_VALUE (declspec_stack);
1868 prefix_attributes = TREE_PURPOSE (declspec_stack);
1869 declspec_stack = TREE_CHAIN (declspec_stack);
1870 }
1871 | declspecs_nosc_nots setspecs components_notype
1872 { $$ = $3;
1873 current_declspecs = TREE_VALUE (declspec_stack);
1874 prefix_attributes = TREE_PURPOSE (declspec_stack);
1875 declspec_stack = TREE_CHAIN (declspec_stack); }
1876 | declspecs_nosc_nots
1877 { if (pedantic)
1878 pedwarn ("ISO C forbids member declarations with no members");
1879 shadow_tag($1);
1880 $$ = NULL_TREE; }
1881 | error
1882 { $$ = NULL_TREE; }
1883 | extension component_decl
1884 { $$ = $2;
1885 RESTORE_WARN_FLAGS ($1); }
1886 ;
1888 components:
1889 component_declarator
1890 | components ',' maybe_setattrs component_declarator
1891 { $$ = chainon ($1, $4); }
1892 ;
1894 components_notype:
1895 component_notype_declarator
1896 | components_notype ',' maybe_setattrs component_notype_declarator
1897 { $$ = chainon ($1, $4); }
1898 ;
1900 component_declarator:
1901 save_filename save_lineno declarator maybe_attribute
1902 { $$ = grokfield ($1, $2, $3, current_declspecs, NULL_TREE);
1903 decl_attributes ($$, $4, prefix_attributes); }
1904 | save_filename save_lineno
1905 declarator ':' expr_no_commas maybe_attribute
1906 { $$ = grokfield ($1, $2, $3, current_declspecs, $5);
1907 decl_attributes ($$, $6, prefix_attributes); }
1908 | save_filename save_lineno ':' expr_no_commas maybe_attribute
1909 { $$ = grokfield ($1, $2, NULL_TREE, current_declspecs, $4);
1910 decl_attributes ($$, $5, prefix_attributes); }
1911 ;
1913 component_notype_declarator:
1914 save_filename save_lineno notype_declarator maybe_attribute
1915 { $$ = grokfield ($1, $2, $3, current_declspecs, NULL_TREE);
1916 decl_attributes ($$, $4, prefix_attributes); }
1917 | save_filename save_lineno
1918 notype_declarator ':' expr_no_commas maybe_attribute
1919 { $$ = grokfield ($1, $2, $3, current_declspecs, $5);
1920 decl_attributes ($$, $6, prefix_attributes); }
1921 | save_filename save_lineno ':' expr_no_commas maybe_attribute
1922 { $$ = grokfield ($1, $2, NULL_TREE, current_declspecs, $4);
1923 decl_attributes ($$, $5, prefix_attributes); }
1924 ;
1926 /* We chain the enumerators in reverse order.
1927 They are put in forward order where enumlist is used.
1928 (The order used to be significant, but no longer is so.
1929 However, we still maintain the order, just to be clean.) */
1931 enumlist:
1932 enumerator
1933 | enumlist ',' enumerator
1934 { if ($1 == error_mark_node)
1935 $$ = $1;
1936 else
1937 $$ = chainon ($3, $1); }
1938 | error
1939 { $$ = error_mark_node; }
1940 ;
1943 enumerator:
1944 identifier
1945 { $$ = build_enumerator ($1, NULL_TREE); }
1946 | identifier '=' expr_no_commas
1947 { $$ = build_enumerator ($1, $3); }
1948 ;
1950 typename:
1951 declspecs_nosc
1952 { tree specs, attrs;
1953 pending_xref_error ();
1954 split_specs_attrs ($1, &specs, &attrs);
1955 /* We don't yet support attributes here. */
1956 if (attrs != NULL_TREE)
1957 warning ("attributes on type name ignored");
1958 $<ttype>$ = specs; }
1959 absdcl
1960 { $$ = build_tree_list ($<ttype>2, $3); }
1961 ;
1963 absdcl: /* an absolute declarator */
1964 /* empty */
1965 { $$ = NULL_TREE; }
1966 | absdcl1
1967 ;
1969 absdcl_maybe_attribute: /* absdcl maybe_attribute, but not just attributes */
1970 /* empty */
1971 { $$ = build_tree_list (build_tree_list (current_declspecs,
1972 NULL_TREE),
1973 build_tree_list (prefix_attributes,
1974 NULL_TREE)); }
1975 | absdcl1
1976 { $$ = build_tree_list (build_tree_list (current_declspecs,
1977 $1),
1978 build_tree_list (prefix_attributes,
1979 NULL_TREE)); }
1980 | absdcl1_noea attributes
1981 { $$ = build_tree_list (build_tree_list (current_declspecs,
1982 $1),
1983 build_tree_list (prefix_attributes,
1984 $2)); }
1985 ;
1987 absdcl1: /* a nonempty absolute declarator */
1988 absdcl1_ea
1989 | absdcl1_noea
1990 ;
1992 absdcl1_noea:
1993 direct_absdcl1
1994 | '*' maybe_type_quals_setattrs absdcl1_noea
1995 { $$ = make_pointer_declarator ($2, $3); }
1996 ;
1998 absdcl1_ea:
1999 '*' maybe_type_quals_setattrs
2000 { $$ = make_pointer_declarator ($2, NULL_TREE); }
2001 | '*' maybe_type_quals_setattrs absdcl1_ea
2002 { $$ = make_pointer_declarator ($2, $3); }
2003 ;
2005 direct_absdcl1:
2006 '(' maybe_setattrs absdcl1 ')'
2007 { $$ = $3; }
2008 | direct_absdcl1 '(' parmlist
2009 { $$ = build_nt (CALL_EXPR, $1, $3, NULL_TREE); }
2010 | direct_absdcl1 array_declarator
2011 { $$ = set_array_declarator_type ($2, $1, 1); }
2012 | '(' parmlist
2013 { $$ = build_nt (CALL_EXPR, NULL_TREE, $2, NULL_TREE); }
2014 | array_declarator
2015 { $$ = set_array_declarator_type ($1, NULL_TREE, 1); }
2016 ;
2018 /* The [...] part of a declarator for an array type. */
2020 array_declarator:
2021 '[' expr ']'
2022 { $$ = build_array_declarator ($2, NULL_TREE, 0, 0); }
2023 | '[' declspecs_nosc expr ']'
2024 { $$ = build_array_declarator ($3, $2, 0, 0); }
2025 | '[' ']'
2026 { $$ = build_array_declarator (NULL_TREE, NULL_TREE, 0, 0); }
2027 | '[' declspecs_nosc ']'
2028 { $$ = build_array_declarator (NULL_TREE, $2, 0, 0); }
2029 | '[' '*' ']'
2030 { $$ = build_array_declarator (NULL_TREE, NULL_TREE, 0, 1); }
2031 | '[' declspecs_nosc '*' ']'
2032 { $$ = build_array_declarator (NULL_TREE, $2, 0, 1); }
2033 | '[' SCSPEC expr ']'
2034 { if (C_RID_CODE ($2) != RID_STATIC)
2035 error ("storage class specifier in array declarator");
2036 $$ = build_array_declarator ($3, NULL_TREE, 1, 0); }
2037 | '[' SCSPEC declspecs_nosc expr ']'
2038 { if (C_RID_CODE ($2) != RID_STATIC)
2039 error ("storage class specifier in array declarator");
2040 $$ = build_array_declarator ($4, $3, 1, 0); }
2041 | '[' declspecs_nosc SCSPEC expr ']'
2042 { if (C_RID_CODE ($3) != RID_STATIC)
2043 error ("storage class specifier in array declarator");
2044 $$ = build_array_declarator ($4, $2, 1, 0); }
2045 ;
2047 /* A nonempty series of declarations and statements (possibly followed by
2048 some labels) that can form the body of a compound statement.
2049 NOTE: we don't allow labels on declarations; this might seem like a
2050 natural extension, but there would be a conflict between attributes
2051 on the label and prefix attributes on the declaration. */
2053 stmts_and_decls:
2054 lineno_stmt_decl_or_labels_ending_stmt
2055 | lineno_stmt_decl_or_labels_ending_decl
2056 | lineno_stmt_decl_or_labels_ending_label
2057 {
2058 pedwarn ("deprecated use of label at end of compound statement");
2059 }
2060 | lineno_stmt_decl_or_labels_ending_error
2061 ;
2063 lineno_stmt_decl_or_labels_ending_stmt:
2064 lineno_stmt
2065 | lineno_stmt_decl_or_labels_ending_stmt lineno_stmt
2066 | lineno_stmt_decl_or_labels_ending_decl lineno_stmt
2067 | lineno_stmt_decl_or_labels_ending_label lineno_stmt
2068 | lineno_stmt_decl_or_labels_ending_error lineno_stmt
2069 ;
2071 lineno_stmt_decl_or_labels_ending_decl:
2072 lineno_decl
2073 | lineno_stmt_decl_or_labels_ending_stmt lineno_decl
2074 { if (pedantic && !flag_isoc99)
2075 pedwarn ("ISO C89 forbids mixed declarations and code"); }
2076 | lineno_stmt_decl_or_labels_ending_decl lineno_decl
2077 | lineno_stmt_decl_or_labels_ending_error lineno_decl
2078 ;
2080 lineno_stmt_decl_or_labels_ending_label:
2081 lineno_label
2082 | lineno_stmt_decl_or_labels_ending_stmt lineno_label
2083 | lineno_stmt_decl_or_labels_ending_decl lineno_label
2084 | lineno_stmt_decl_or_labels_ending_label lineno_label
2085 | lineno_stmt_decl_or_labels_ending_error lineno_label
2086 ;
2088 lineno_stmt_decl_or_labels_ending_error:
2089 errstmt
2090 | lineno_stmt_decl_or_labels errstmt
2091 ;
2093 lineno_stmt_decl_or_labels:
2094 lineno_stmt_decl_or_labels_ending_stmt
2095 | lineno_stmt_decl_or_labels_ending_decl
2096 | lineno_stmt_decl_or_labels_ending_label
2097 | lineno_stmt_decl_or_labels_ending_error
2098 ;
2100 errstmt: error ';'
2101 ;
2103 pushlevel: /* empty */
2104 { pushlevel (0);
2105 clear_last_expr ();
2106 add_scope_stmt (/*begin_p=*/1, /*partial_p=*/0);
2107 ifobjc
2108 if (objc_method_context)
2109 add_objc_decls ();
2110 end ifobjc
2111 }
2112 ;
2114 poplevel: /* empty */
2115 { $$ = add_scope_stmt (/*begin_p=*/0, /*partial_p=*/0); }
2117 /* Start and end blocks created for the new scopes of C99. */
2118 c99_block_start: /* empty */
2119 { if (flag_isoc99)
2120 {
2121 $$ = c_begin_compound_stmt ();
2122 pushlevel (0);
2123 clear_last_expr ();
2124 add_scope_stmt (/*begin_p=*/1, /*partial_p=*/0);
2125 ifobjc
2126 if (objc_method_context)
2127 add_objc_decls ();
2128 end ifobjc
2129 }
2130 else
2131 $$ = NULL_TREE;
2132 }
2133 ;
2135 /* Productions using c99_block_start and c99_block_end will need to do what's
2136 in compstmt: RECHAIN_STMTS ($1, COMPOUND_BODY ($1)); $$ = $2; where
2137 $1 is the value of c99_block_start and $2 of c99_block_end. */
2138 c99_block_end: /* empty */
2139 { if (flag_isoc99)
2140 {
2141 tree scope_stmt = add_scope_stmt (/*begin_p=*/0, /*partial_p=*/0);
2142 $$ = poplevel (kept_level_p (), 0, 0);
2143 SCOPE_STMT_BLOCK (TREE_PURPOSE (scope_stmt))
2144 = SCOPE_STMT_BLOCK (TREE_VALUE (scope_stmt))
2145 = $$;
2146 }
2147 else
2148 $$ = NULL_TREE; }
2149 ;
2151 /* Read zero or more forward-declarations for labels
2152 that nested functions can jump to. */
2153 maybe_label_decls:
2154 /* empty */
2155 | label_decls
2156 { if (pedantic)
2157 pedwarn ("ISO C forbids label declarations"); }
2158 ;
2160 label_decls:
2161 label_decl
2162 | label_decls label_decl
2163 ;
2165 label_decl:
2166 LABEL identifiers_or_typenames ';'
2167 { tree link;
2168 for (link = $2; link; link = TREE_CHAIN (link))
2169 {
2170 tree label = shadow_label (TREE_VALUE (link));
2171 C_DECLARED_LABEL_FLAG (label) = 1;
2172 add_decl_stmt (label);
2173 }
2174 }
2175 ;
2177 /* This is the body of a function definition.
2178 It causes syntax errors to ignore to the next openbrace. */
2179 compstmt_or_error:
2180 compstmt
2181 {}
2182 | error compstmt
2183 ;
2185 compstmt_start: '{' { compstmt_count++;
2186 $$ = c_begin_compound_stmt (); }
2188 compstmt_nostart: '}'
2189 { $$ = convert (void_type_node, integer_zero_node); }
2190 | pushlevel maybe_label_decls compstmt_contents_nonempty '}' poplevel
2191 { $$ = poplevel (kept_level_p (), 1, 0);
2192 SCOPE_STMT_BLOCK (TREE_PURPOSE ($5))
2193 = SCOPE_STMT_BLOCK (TREE_VALUE ($5))
2194 = $$; }
2195 ;
2197 compstmt_contents_nonempty:
2198 stmts_and_decls
2199 | error
2200 ;
2202 compstmt_primary_start:
2203 '(' '{'
2204 { if (current_function_decl == 0)
2205 {
2206 error ("braced-group within expression allowed only inside a function");
2207 YYERROR;
2208 }
2209 /* We must force a BLOCK for this level
2210 so that, if it is not expanded later,
2211 there is a way to turn off the entire subtree of blocks
2212 that are contained in it. */
2213 keep_next_level ();
2214 push_label_level ();
2215 compstmt_count++;
2216 $$ = add_stmt (build_stmt (COMPOUND_STMT, last_tree));
2217 }
2219 compstmt: compstmt_start compstmt_nostart
2220 { RECHAIN_STMTS ($1, COMPOUND_BODY ($1));
2221 $$ = $1; }
2222 ;
2224 /* Value is number of statements counted as of the closeparen. */
2225 simple_if:
2226 if_prefix c99_block_lineno_labeled_stmt
2227 { c_finish_then (); }
2228 /* Make sure c_expand_end_cond is run once
2229 for each call to c_expand_start_cond.
2230 Otherwise a crash is likely. */
2231 | if_prefix error
2232 ;
2234 if_prefix:
2235 IF '(' expr ')'
2236 { c_expand_start_cond (truthvalue_conversion ($3),
2237 compstmt_count);
2238 $<itype>$ = stmt_count;
2239 if_stmt_file = $<filename>-2;
2240 if_stmt_line = $<lineno>-1; }
2241 ;
2243 /* This is a subroutine of stmt.
2244 It is used twice, once for valid DO statements
2245 and once for catching errors in parsing the end test. */
2246 do_stmt_start:
2247 DO
2248 { stmt_count++;
2249 compstmt_count++;
2250 $<ttype>$
2251 = add_stmt (build_stmt (DO_STMT, NULL_TREE,
2252 NULL_TREE));
2253 /* In the event that a parse error prevents
2254 parsing the complete do-statement, set the
2255 condition now. Otherwise, we can get crashes at
2256 RTL-generation time. */
2257 DO_COND ($<ttype>$) = error_mark_node; }
2258 c99_block_lineno_labeled_stmt WHILE
2259 { $$ = $<ttype>2;
2260 RECHAIN_STMTS ($$, DO_BODY ($$)); }
2261 ;
2263 /* The forced readahead in here is because we might be at the end of a
2264 line, and the line and file won't be bumped until yylex absorbs the
2265 first token on the next line. */
2266 save_filename:
2267 { if (yychar == YYEMPTY)
2268 yychar = YYLEX;
2269 $$ = input_filename; }
2270 ;
2272 save_lineno:
2273 { if (yychar == YYEMPTY)
2274 yychar = YYLEX;
2275 $$ = lineno; }
2276 ;
2278 lineno_labeled_stmt:
2279 lineno_stmt
2280 | lineno_label lineno_labeled_stmt
2281 ;
2283 /* Like lineno_labeled_stmt, but a block in C99. */
2284 c99_block_lineno_labeled_stmt:
2285 c99_block_start lineno_labeled_stmt c99_block_end
2286 { if (flag_isoc99)
2287 RECHAIN_STMTS ($1, COMPOUND_BODY ($1)); }
2288 ;
2290 lineno_stmt:
2291 save_filename save_lineno stmt
2292 { if ($3)
2293 {
2294 STMT_LINENO ($3) = $2;
2295 /* ??? We currently have no way of recording
2296 the filename for a statement. This probably
2297 matters little in practice at the moment,
2298 but I suspect that problems will ocurr when
2299 doing inlining at the tree level. */
2300 }
2301 }
2302 ;
2304 lineno_label:
2305 save_filename save_lineno label
2306 { if ($3)
2307 {
2308 STMT_LINENO ($3) = $2;
2309 }
2310 }
2311 ;
2313 select_or_iter_stmt:
2314 simple_if ELSE
2315 { c_expand_start_else ();
2316 $<itype>1 = stmt_count; }
2317 c99_block_lineno_labeled_stmt
2318 { c_finish_else ();
2319 c_expand_end_cond ();
2320 if (extra_warnings && stmt_count == $<itype>1)
2321 warning ("empty body in an else-statement"); }
2322 | simple_if %prec IF
2323 { c_expand_end_cond ();
2324 /* This warning is here instead of in simple_if, because we
2325 do not want a warning if an empty if is followed by an
2326 else statement. Increment stmt_count so we don't
2327 give a second error if this is a nested `if'. */
2328 if (extra_warnings && stmt_count++ == $<itype>1)
2329 warning_with_file_and_line (if_stmt_file, if_stmt_line,
2330 "empty body in an if-statement"); }
2331 /* Make sure c_expand_end_cond is run once
2332 for each call to c_expand_start_cond.
2333 Otherwise a crash is likely. */
2334 | simple_if ELSE error
2335 { c_expand_end_cond (); }
2336 | WHILE
2337 { stmt_count++; }
2338 '(' expr ')'
2339 { $4 = truthvalue_conversion ($4);
2340 $<ttype>$
2341 = add_stmt (build_stmt (WHILE_STMT, $4, NULL_TREE)); }
2342 c99_block_lineno_labeled_stmt
2343 { RECHAIN_STMTS ($<ttype>6, WHILE_BODY ($<ttype>6)); }
2344 | do_stmt_start
2345 '(' expr ')' ';'
2346 { DO_COND ($1) = truthvalue_conversion ($3); }
2347 | do_stmt_start error
2348 { }
2349 | FOR
2350 { $<ttype>$ = build_stmt (FOR_STMT, NULL_TREE, NULL_TREE,
2351 NULL_TREE, NULL_TREE);
2352 add_stmt ($<ttype>$); }
2353 '(' for_init_stmt
2354 { stmt_count++;
2355 RECHAIN_STMTS ($<ttype>2, FOR_INIT_STMT ($<ttype>2)); }
2356 xexpr ';'
2357 { if ($6)
2358 FOR_COND ($<ttype>2) = truthvalue_conversion ($6); }
2359 xexpr ')'
2360 { FOR_EXPR ($<ttype>2) = $9; }
2361 c99_block_lineno_labeled_stmt
2362 { RECHAIN_STMTS ($<ttype>2, FOR_BODY ($<ttype>2)); }
2363 | SWITCH '(' expr ')'
2364 { stmt_count++;
2365 $<ttype>$ = c_start_case ($3); }
2366 c99_block_lineno_labeled_stmt
2367 { c_finish_case (); }
2368 ;
2370 for_init_stmt:
2371 xexpr ';'
2372 { add_stmt (build_stmt (EXPR_STMT, $1)); }
2373 | decl
2374 { check_for_loop_decls (); }
2375 ;
2377 /* Parse a single real statement, not including any labels. */
2378 stmt:
2379 compstmt
2380 { stmt_count++; $$ = $1; }
2381 | expr ';'
2382 { stmt_count++;
2383 $$ = c_expand_expr_stmt ($1); }
2384 | c99_block_start select_or_iter_stmt c99_block_end
2385 { if (flag_isoc99)
2386 RECHAIN_STMTS ($1, COMPOUND_BODY ($1));
2387 $$ = NULL_TREE; }
2388 | BREAK ';'
2389 { stmt_count++;
2390 $$ = add_stmt (build_break_stmt ()); }
2391 | CONTINUE ';'
2392 { stmt_count++;
2393 $$ = add_stmt (build_continue_stmt ()); }
2394 | RETURN ';'
2395 { stmt_count++;
2396 $$ = c_expand_return (NULL_TREE); }
2397 | RETURN expr ';'
2398 { stmt_count++;
2399 $$ = c_expand_return ($2); }
2400 | ASM_KEYWORD maybe_type_qual '(' expr ')' ';'
2401 { stmt_count++;
2402 $$ = simple_asm_stmt ($4); }
2403 /* This is the case with just output operands. */
2404 | ASM_KEYWORD maybe_type_qual '(' expr ':' asm_operands ')' ';'
2405 { stmt_count++;
2406 $$ = build_asm_stmt ($2, $4, $6, NULL_TREE, NULL_TREE); }
2407 /* This is the case with input operands as well. */
2408 | ASM_KEYWORD maybe_type_qual '(' expr ':' asm_operands ':'
2409 asm_operands ')' ';'
2410 { stmt_count++;
2411 $$ = build_asm_stmt ($2, $4, $6, $8, NULL_TREE); }
2412 /* This is the case with clobbered registers as well. */
2413 | ASM_KEYWORD maybe_type_qual '(' expr ':' asm_operands ':'
2414 asm_operands ':' asm_clobbers ')' ';'
2415 { stmt_count++;
2416 $$ = build_asm_stmt ($2, $4, $6, $8, $10); }
2417 | GOTO identifier ';'
2418 { tree decl;
2419 stmt_count++;
2420 decl = lookup_label ($2);
2421 if (decl != 0)
2422 {
2423 TREE_USED (decl) = 1;
2424 $$ = add_stmt (build_stmt (GOTO_STMT, decl));
2425 }
2426 else
2427 $$ = NULL_TREE;
2428 }
2429 | GOTO '*' expr ';'
2430 { if (pedantic)
2431 pedwarn ("ISO C forbids `goto *expr;'");
2432 stmt_count++;
2433 $3 = convert (ptr_type_node, $3);
2434 $$ = add_stmt (build_stmt (GOTO_STMT, $3)); }
2435 | ';'
2436 { $$ = NULL_TREE; }
2437 ;
2439 /* Any kind of label, including jump labels and case labels.
2440 ANSI C accepts labels only before statements, but we allow them
2441 also at the end of a compound statement. */
2443 label: CASE expr_no_commas ':'
2444 { stmt_count++;
2445 $$ = do_case ($2, NULL_TREE); }
2446 | CASE expr_no_commas ELLIPSIS expr_no_commas ':'
2447 { stmt_count++;
2448 $$ = do_case ($2, $4); }
2449 | DEFAULT ':'
2450 { stmt_count++;
2451 $$ = do_case (NULL_TREE, NULL_TREE); }
2452 | identifier save_filename save_lineno ':' maybe_attribute
2453 { tree label = define_label ($2, $3, $1);
2454 stmt_count++;
2455 if (label)
2456 {
2457 decl_attributes (label, $5, NULL_TREE);
2458 $$ = add_stmt (build_stmt (LABEL_STMT, label));
2459 }
2460 else
2461 $$ = NULL_TREE;
2462 }
2463 ;
2465 /* Either a type-qualifier or nothing. First thing in an `asm' statement. */
2467 maybe_type_qual:
2468 /* empty */
2469 { emit_line_note (input_filename, lineno);
2470 $$ = NULL_TREE; }
2471 | TYPE_QUAL
2472 { emit_line_note (input_filename, lineno); }
2473 ;
2475 xexpr:
2476 /* empty */
2477 { $$ = NULL_TREE; }
2478 | expr
2479 ;
2481 /* These are the operands other than the first string and colon
2482 in asm ("addextend %2,%1": "=dm" (x), "0" (y), "g" (*x)) */
2483 asm_operands: /* empty */
2484 { $$ = NULL_TREE; }
2485 | nonnull_asm_operands
2486 ;
2488 nonnull_asm_operands:
2489 asm_operand
2490 | nonnull_asm_operands ',' asm_operand
2491 { $$ = chainon ($1, $3); }
2492 ;
2494 asm_operand:
2495 STRING '(' expr ')'
2496 { $$ = build_tree_list ($1, $3); }
2497 ;
2499 asm_clobbers:
2500 string
2501 { $$ = tree_cons (NULL_TREE, combine_strings ($1), NULL_TREE); }
2502 | asm_clobbers ',' string
2503 { $$ = tree_cons (NULL_TREE, combine_strings ($3), $1); }
2504 ;
2505 \f
2506 /* This is what appears inside the parens in a function declarator.
2507 Its value is a list of ..._TYPE nodes. Attributes must appear here
2508 to avoid a conflict with their appearance after an open parenthesis
2509 in an abstract declarator, as in
2510 "void bar (int (__attribute__((__mode__(SI))) int foo));". */
2511 parmlist:
2512 maybe_attribute
2513 { pushlevel (0);
2514 clear_parm_order ();
2515 declare_parm_level (0); }
2516 parmlist_1
2517 { $$ = $3;
2518 parmlist_tags_warning ();
2519 poplevel (0, 0, 0); }
2520 ;
2522 parmlist_1:
2523 parmlist_2 ')'
2524 | parms ';'
2525 { tree parm;
2526 if (pedantic)
2527 pedwarn ("ISO C forbids forward parameter declarations");
2528 /* Mark the forward decls as such. */
2529 for (parm = getdecls (); parm; parm = TREE_CHAIN (parm))
2530 TREE_ASM_WRITTEN (parm) = 1;
2531 clear_parm_order (); }
2532 maybe_attribute
2533 { /* Dummy action so attributes are in known place
2534 on parser stack. */ }
2535 parmlist_1
2536 { $$ = $6; }
2537 | error ')'
2538 { $$ = tree_cons (NULL_TREE, NULL_TREE, NULL_TREE); }
2539 ;
2541 /* This is what appears inside the parens in a function declarator.
2542 Is value is represented in the format that grokdeclarator expects. */
2543 parmlist_2: /* empty */
2544 { $$ = get_parm_info (0); }
2545 | ELLIPSIS
2546 { $$ = get_parm_info (0);
2547 /* Gcc used to allow this as an extension. However, it does
2548 not work for all targets, and thus has been disabled.
2549 Also, since func (...) and func () are indistinguishable,
2550 it caused problems with the code in expand_builtin which
2551 tries to verify that BUILT_IN_NEXT_ARG is being used
2552 correctly. */
2553 error ("ISO C requires a named argument before `...'");
2554 }
2555 | parms
2556 { $$ = get_parm_info (1); }
2557 | parms ',' ELLIPSIS
2558 { $$ = get_parm_info (0); }
2559 ;
2561 parms:
2562 firstparm
2563 { push_parm_decl ($1); }
2564 | parms ',' parm
2565 { push_parm_decl ($3); }
2566 ;
2568 /* A single parameter declaration or parameter type name,
2569 as found in a parmlist. */
2570 parm:
2571 declspecs_ts setspecs parm_declarator maybe_attribute
2572 { $$ = build_tree_list (build_tree_list (current_declspecs,
2573 $3),
2574 build_tree_list (prefix_attributes,
2575 $4));
2576 current_declspecs = TREE_VALUE (declspec_stack);
2577 prefix_attributes = TREE_PURPOSE (declspec_stack);
2578 declspec_stack = TREE_CHAIN (declspec_stack); }
2579 | declspecs_ts setspecs notype_declarator maybe_attribute
2580 { $$ = build_tree_list (build_tree_list (current_declspecs,
2581 $3),
2582 build_tree_list (prefix_attributes,
2583 $4));
2584 current_declspecs = TREE_VALUE (declspec_stack);
2585 prefix_attributes = TREE_PURPOSE (declspec_stack);
2586 declspec_stack = TREE_CHAIN (declspec_stack); }
2587 | declspecs_ts setspecs absdcl_maybe_attribute
2588 { $$ = $3;
2589 current_declspecs = TREE_VALUE (declspec_stack);
2590 prefix_attributes = TREE_PURPOSE (declspec_stack);
2591 declspec_stack = TREE_CHAIN (declspec_stack); }
2592 | declspecs_nots setspecs notype_declarator maybe_attribute
2593 { $$ = build_tree_list (build_tree_list (current_declspecs,
2594 $3),
2595 build_tree_list (prefix_attributes,
2596 $4));
2597 current_declspecs = TREE_VALUE (declspec_stack);
2598 prefix_attributes = TREE_PURPOSE (declspec_stack);
2599 declspec_stack = TREE_CHAIN (declspec_stack); }
2601 | declspecs_nots setspecs absdcl_maybe_attribute
2602 { $$ = $3;
2603 current_declspecs = TREE_VALUE (declspec_stack);
2604 prefix_attributes = TREE_PURPOSE (declspec_stack);
2605 declspec_stack = TREE_CHAIN (declspec_stack); }
2606 ;
2608 /* The first parm, which must suck attributes from off the top of the parser
2609 stack. */
2610 firstparm:
2611 declspecs_ts_nosa setspecs_fp parm_declarator maybe_attribute
2612 { $$ = build_tree_list (build_tree_list (current_declspecs,
2613 $3),
2614 build_tree_list (prefix_attributes,
2615 $4));
2616 current_declspecs = TREE_VALUE (declspec_stack);
2617 prefix_attributes = TREE_PURPOSE (declspec_stack);
2618 declspec_stack = TREE_CHAIN (declspec_stack); }
2619 | declspecs_ts_nosa setspecs_fp notype_declarator maybe_attribute
2620 { $$ = build_tree_list (build_tree_list (current_declspecs,
2621 $3),
2622 build_tree_list (prefix_attributes,
2623 $4));
2624 current_declspecs = TREE_VALUE (declspec_stack);
2625 prefix_attributes = TREE_PURPOSE (declspec_stack);
2626 declspec_stack = TREE_CHAIN (declspec_stack); }
2627 | declspecs_ts_nosa setspecs_fp absdcl_maybe_attribute
2628 { $$ = $3;
2629 current_declspecs = TREE_VALUE (declspec_stack);
2630 prefix_attributes = TREE_PURPOSE (declspec_stack);
2631 declspec_stack = TREE_CHAIN (declspec_stack); }
2632 | declspecs_nots_nosa setspecs_fp notype_declarator maybe_attribute
2633 { $$ = build_tree_list (build_tree_list (current_declspecs,
2634 $3),
2635 build_tree_list (prefix_attributes,
2636 $4));
2637 current_declspecs = TREE_VALUE (declspec_stack);
2638 prefix_attributes = TREE_PURPOSE (declspec_stack);
2639 declspec_stack = TREE_CHAIN (declspec_stack); }
2641 | declspecs_nots_nosa setspecs_fp absdcl_maybe_attribute
2642 { $$ = $3;
2643 current_declspecs = TREE_VALUE (declspec_stack);
2644 prefix_attributes = TREE_PURPOSE (declspec_stack);
2645 declspec_stack = TREE_CHAIN (declspec_stack); }
2646 ;
2648 setspecs_fp:
2649 setspecs
2650 { prefix_attributes = chainon (prefix_attributes, $<ttype>-2); }
2651 ;
2653 /* This is used in a function definition
2654 where either a parmlist or an identifier list is ok.
2655 Its value is a list of ..._TYPE nodes or a list of identifiers. */
2656 parmlist_or_identifiers:
2657 { pushlevel (0);
2658 clear_parm_order ();
2659 declare_parm_level (1); }
2660 parmlist_or_identifiers_1
2661 { $$ = $2;
2662 parmlist_tags_warning ();
2663 poplevel (0, 0, 0); }
2664 ;
2666 parmlist_or_identifiers_1:
2667 parmlist_1
2668 | identifiers ')'
2669 { tree t;
2670 for (t = $1; t; t = TREE_CHAIN (t))
2671 if (TREE_VALUE (t) == NULL_TREE)
2672 error ("`...' in old-style identifier list");
2673 $$ = tree_cons (NULL_TREE, NULL_TREE, $1); }
2674 ;
2676 /* A nonempty list of identifiers. */
2677 identifiers:
2678 IDENTIFIER
2679 { $$ = build_tree_list (NULL_TREE, $1); }
2680 | identifiers ',' IDENTIFIER
2681 { $$ = chainon ($1, build_tree_list (NULL_TREE, $3)); }
2682 ;
2684 /* A nonempty list of identifiers, including typenames. */
2685 identifiers_or_typenames:
2686 identifier
2687 { $$ = build_tree_list (NULL_TREE, $1); }
2688 | identifiers_or_typenames ',' identifier
2689 { $$ = chainon ($1, build_tree_list (NULL_TREE, $3)); }
2690 ;
2692 extension:
2693 EXTENSION
2694 { $$ = SAVE_WARN_FLAGS();
2695 pedantic = 0;
2696 warn_pointer_arith = 0; }
2697 ;
2698 \f
2699 ifobjc
2700 /* Objective-C productions. */
2702 objcdef:
2703 classdef
2704 | classdecl
2705 | aliasdecl
2706 | protocoldef
2707 | methoddef
2708 | END
2709 {
2710 if (objc_implementation_context)
2711 {
2712 finish_class (objc_implementation_context);
2713 objc_ivar_chain = NULL_TREE;
2714 objc_implementation_context = NULL_TREE;
2715 }
2716 else
2717 warning ("`@end' must appear in an implementation context");
2718 }
2719 ;
2721 /* A nonempty list of identifiers. */
2722 identifier_list:
2723 identifier
2724 { $$ = build_tree_list (NULL_TREE, $1); }
2725 | identifier_list ',' identifier
2726 { $$ = chainon ($1, build_tree_list (NULL_TREE, $3)); }
2727 ;
2729 classdecl:
2730 CLASS identifier_list ';'
2731 {
2732 objc_declare_class ($2);
2733 }
2735 aliasdecl:
2736 ALIAS identifier identifier ';'
2737 {
2738 objc_declare_alias ($2, $3);
2739 }
2741 classdef:
2742 INTERFACE identifier protocolrefs '{'
2743 {
2744 objc_interface_context = objc_ivar_context
2745 = start_class (CLASS_INTERFACE_TYPE, $2, NULL_TREE, $3);
2746 objc_public_flag = 0;
2747 }
2748 ivar_decl_list '}'
2749 {
2750 continue_class (objc_interface_context);
2751 }
2752 methodprotolist
2753 END
2754 {
2755 finish_class (objc_interface_context);
2756 objc_interface_context = NULL_TREE;
2757 }
2759 | INTERFACE identifier protocolrefs
2760 {
2761 objc_interface_context
2762 = start_class (CLASS_INTERFACE_TYPE, $2, NULL_TREE, $3);
2763 continue_class (objc_interface_context);
2764 }
2765 methodprotolist
2766 END
2767 {
2768 finish_class (objc_interface_context);
2769 objc_interface_context = NULL_TREE;
2770 }
2772 | INTERFACE identifier ':' identifier protocolrefs '{'
2773 {
2774 objc_interface_context = objc_ivar_context
2775 = start_class (CLASS_INTERFACE_TYPE, $2, $4, $5);
2776 objc_public_flag = 0;
2777 }
2778 ivar_decl_list '}'
2779 {
2780 continue_class (objc_interface_context);
2781 }
2782 methodprotolist
2783 END
2784 {
2785 finish_class (objc_interface_context);
2786 objc_interface_context = NULL_TREE;
2787 }
2789 | INTERFACE identifier ':' identifier protocolrefs
2790 {
2791 objc_interface_context
2792 = start_class (CLASS_INTERFACE_TYPE, $2, $4, $5);
2793 continue_class (objc_interface_context);
2794 }
2795 methodprotolist
2796 END
2797 {
2798 finish_class (objc_interface_context);
2799 objc_interface_context = NULL_TREE;
2800 }
2802 | IMPLEMENTATION identifier '{'
2803 {
2804 objc_implementation_context = objc_ivar_context
2805 = start_class (CLASS_IMPLEMENTATION_TYPE, $2, NULL_TREE, NULL_TREE);
2806 objc_public_flag = 0;
2807 }
2808 ivar_decl_list '}'
2809 {
2810 objc_ivar_chain
2811 = continue_class (objc_implementation_context);
2812 }
2814 | IMPLEMENTATION identifier
2815 {
2816 objc_implementation_context
2817 = start_class (CLASS_IMPLEMENTATION_TYPE, $2, NULL_TREE, NULL_TREE);
2818 objc_ivar_chain
2819 = continue_class (objc_implementation_context);
2820 }
2822 | IMPLEMENTATION identifier ':' identifier '{'
2823 {
2824 objc_implementation_context = objc_ivar_context
2825 = start_class (CLASS_IMPLEMENTATION_TYPE, $2, $4, NULL_TREE);
2826 objc_public_flag = 0;
2827 }
2828 ivar_decl_list '}'
2829 {
2830 objc_ivar_chain
2831 = continue_class (objc_implementation_context);
2832 }
2834 | IMPLEMENTATION identifier ':' identifier
2835 {
2836 objc_implementation_context
2837 = start_class (CLASS_IMPLEMENTATION_TYPE, $2, $4, NULL_TREE);
2838 objc_ivar_chain
2839 = continue_class (objc_implementation_context);
2840 }
2842 | INTERFACE identifier '(' identifier ')' protocolrefs
2843 {
2844 objc_interface_context
2845 = start_class (CATEGORY_INTERFACE_TYPE, $2, $4, $6);
2846 continue_class (objc_interface_context);
2847 }
2848 methodprotolist
2849 END
2850 {
2851 finish_class (objc_interface_context);
2852 objc_interface_context = NULL_TREE;
2853 }
2855 | IMPLEMENTATION identifier '(' identifier ')'
2856 {
2857 objc_implementation_context
2858 = start_class (CATEGORY_IMPLEMENTATION_TYPE, $2, $4, NULL_TREE);
2859 objc_ivar_chain
2860 = continue_class (objc_implementation_context);
2861 }
2862 ;
2864 protocoldef:
2865 PROTOCOL identifier protocolrefs
2866 {
2867 objc_pq_context = 1;
2868 objc_interface_context
2869 = start_protocol(PROTOCOL_INTERFACE_TYPE, $2, $3);
2870 }
2871 methodprotolist END
2872 {
2873 objc_pq_context = 0;
2874 finish_protocol(objc_interface_context);
2875 objc_interface_context = NULL_TREE;
2876 }
2877 ;
2879 protocolrefs:
2880 /* empty */
2881 {
2882 $$ = NULL_TREE;
2883 }
2884 | non_empty_protocolrefs
2885 ;
2887 non_empty_protocolrefs:
2888 ARITHCOMPARE identifier_list ARITHCOMPARE
2889 {
2890 if ($1 == LT_EXPR && $3 == GT_EXPR)
2891 $$ = $2;
2892 else
2893 YYERROR1;
2894 }
2895 ;
2897 ivar_decl_list:
2898 ivar_decl_list visibility_spec ivar_decls
2899 | ivar_decls
2900 ;
2902 visibility_spec:
2903 PRIVATE { objc_public_flag = 2; }
2904 | PROTECTED { objc_public_flag = 0; }
2905 | PUBLIC { objc_public_flag = 1; }
2906 ;
2908 ivar_decls:
2909 /* empty */
2910 {
2911 $$ = NULL_TREE;
2912 }
2913 | ivar_decls ivar_decl ';'
2914 | ivar_decls ';'
2915 {
2916 if (pedantic)
2917 pedwarn ("extra semicolon in struct or union specified");
2918 }
2919 ;
2922 /* There is a shift-reduce conflict here, because `components' may
2923 start with a `typename'. It happens that shifting (the default resolution)
2924 does the right thing, because it treats the `typename' as part of
2925 a `typed_typespecs'.
2927 It is possible that this same technique would allow the distinction
2928 between `notype_initdecls' and `initdecls' to be eliminated.
2929 But I am being cautious and not trying it. */
2931 ivar_decl:
2932 declspecs_nosc_ts setspecs ivars
2933 { $$ = $3;
2934 current_declspecs = TREE_VALUE (declspec_stack);
2935 prefix_attributes = TREE_PURPOSE (declspec_stack);
2936 declspec_stack = TREE_CHAIN (declspec_stack); }
2937 | declspecs_nosc_nots setspecs ivars
2938 { $$ = $3;
2939 current_declspecs = TREE_VALUE (declspec_stack);
2940 prefix_attributes = TREE_PURPOSE (declspec_stack);
2941 declspec_stack = TREE_CHAIN (declspec_stack); }
2942 | error
2943 { $$ = NULL_TREE; }
2944 ;
2946 ivars:
2947 /* empty */
2948 { $$ = NULL_TREE; }
2949 | ivar_declarator
2950 | ivars ',' maybe_setattrs ivar_declarator
2951 ;
2953 ivar_declarator:
2954 declarator
2955 {
2956 $$ = add_instance_variable (objc_ivar_context,
2957 objc_public_flag,
2958 $1, current_declspecs,
2959 NULL_TREE);
2960 }
2961 | declarator ':' expr_no_commas
2962 {
2963 $$ = add_instance_variable (objc_ivar_context,
2964 objc_public_flag,
2965 $1, current_declspecs, $3);
2966 }
2967 | ':' expr_no_commas
2968 {
2969 $$ = add_instance_variable (objc_ivar_context,
2970 objc_public_flag,
2971 NULL_TREE,
2972 current_declspecs, $2);
2973 }
2974 ;
2976 methodtype:
2977 '+'
2978 { objc_inherit_code = CLASS_METHOD_DECL; }
2979 | '-'
2980 { objc_inherit_code = INSTANCE_METHOD_DECL; }
2981 ;
2983 methoddef:
2984 methodtype
2985 {
2986 objc_pq_context = 1;
2987 if (!objc_implementation_context)
2988 fatal_error ("method definition not in class context");
2989 }
2990 methoddecl
2991 {
2992 objc_pq_context = 0;
2993 if (objc_inherit_code == CLASS_METHOD_DECL)
2994 add_class_method (objc_implementation_context, $3);
2995 else
2996 add_instance_method (objc_implementation_context, $3);
2997 start_method_def ($3);
2998 objc_method_context = $3;
2999 }
3000 optarglist
3001 {
3002 continue_method_def ();
3003 }
3004 compstmt_or_error
3005 {
3006 finish_method_def ();
3007 objc_method_context = NULL_TREE;
3008 }
3009 ;
3011 /* the reason for the strange actions in this rule
3012 is so that notype_initdecls when reached via datadef
3013 can find a valid list of type and sc specs in $0. */
3015 methodprotolist:
3016 /* empty */
3017 | {$<ttype>$ = NULL_TREE; } methodprotolist2
3018 ;
3020 methodprotolist2: /* eliminates a shift/reduce conflict */
3021 methodproto
3022 | datadef
3023 | methodprotolist2 methodproto
3024 | methodprotolist2 {$<ttype>$ = NULL_TREE; } datadef
3025 ;
3027 semi_or_error:
3028 ';'
3029 | error
3030 ;
3032 methodproto:
3033 methodtype
3034 {
3035 /* Remember protocol qualifiers in prototypes. */
3036 objc_pq_context = 1;
3037 }
3038 methoddecl
3039 {
3040 /* Forget protocol qualifiers here. */
3041 objc_pq_context = 0;
3042 if (objc_inherit_code == CLASS_METHOD_DECL)
3043 add_class_method (objc_interface_context, $3);
3044 else
3045 add_instance_method (objc_interface_context, $3);
3046 }
3047 semi_or_error
3048 ;
3050 methoddecl:
3051 '(' typename ')' unaryselector
3052 {
3053 $$ = build_method_decl (objc_inherit_code, $2, $4, NULL_TREE);
3054 }
3056 | unaryselector
3057 {
3058 $$ = build_method_decl (objc_inherit_code, NULL_TREE, $1, NULL_TREE);
3059 }
3061 | '(' typename ')' keywordselector optparmlist
3062 {
3063 $$ = build_method_decl (objc_inherit_code, $2, $4, $5);
3064 }
3066 | keywordselector optparmlist
3067 {
3068 $$ = build_method_decl (objc_inherit_code, NULL_TREE, $1, $2);
3069 }
3070 ;
3072 /* "optarglist" assumes that start_method_def has already been called...
3073 if it is not, the "xdecls" will not be placed in the proper scope */
3075 optarglist:
3076 /* empty */
3077 | ';' myxdecls
3078 ;
3080 /* to get around the following situation: "int foo (int a) int b; {}" that
3081 is synthesized when parsing "- a:a b:b; id c; id d; { ... }" */
3083 myxdecls:
3084 /* empty */
3085 | mydecls
3086 ;
3088 mydecls:
3089 mydecl
3090 | errstmt
3091 | mydecls mydecl
3092 | mydecl errstmt
3093 ;
3095 mydecl:
3096 declspecs_ts setspecs myparms ';'
3097 { current_declspecs = TREE_VALUE (declspec_stack);
3098 prefix_attributes = TREE_PURPOSE (declspec_stack);
3099 declspec_stack = TREE_CHAIN (declspec_stack); }
3100 | declspecs_ts ';'
3101 { shadow_tag ($1); }
3102 | declspecs_nots ';'
3103 { pedwarn ("empty declaration"); }
3104 ;
3106 myparms:
3107 myparm
3108 { push_parm_decl ($1); }
3109 | myparms ',' myparm
3110 { push_parm_decl ($3); }
3111 ;
3113 /* A single parameter declaration or parameter type name,
3114 as found in a parmlist. DOES NOT ALLOW AN INITIALIZER OR ASMSPEC */
3116 myparm:
3117 parm_declarator maybe_attribute
3118 { $$ = build_tree_list (build_tree_list (current_declspecs,
3119 $1),
3120 build_tree_list (prefix_attributes,
3121 $2)); }
3122 | notype_declarator maybe_attribute
3123 { $$ = build_tree_list (build_tree_list (current_declspecs,
3124 $1),
3125 build_tree_list (prefix_attributes,
3126 $2)); }
3127 | absdcl_maybe_attribute
3128 { $$ = $1; }
3129 ;
3131 optparmlist:
3132 /* empty */
3133 {
3134 $$ = NULL_TREE;
3135 }
3136 | ',' ELLIPSIS
3137 {
3138 /* oh what a kludge! */
3139 $$ = objc_ellipsis_node;
3140 }
3141 | ','
3142 {
3143 pushlevel (0);
3144 }
3145 parmlist_2
3146 {
3147 /* returns a tree list node generated by get_parm_info */
3148 $$ = $3;
3149 poplevel (0, 0, 0);
3150 }
3151 ;
3153 unaryselector:
3154 selector
3155 ;
3157 keywordselector:
3158 keyworddecl
3160 | keywordselector keyworddecl
3161 {
3162 $$ = chainon ($1, $2);
3163 }
3164 ;
3166 selector:
3167 IDENTIFIER
3168 | TYPENAME
3169 | OBJECTNAME
3170 | reservedwords
3171 ;
3173 reservedwords:
3174 ENUM | STRUCT | UNION | IF | ELSE | WHILE | DO | FOR
3175 | SWITCH | CASE | DEFAULT | BREAK | CONTINUE | RETURN
3176 | GOTO | ASM_KEYWORD | SIZEOF | TYPEOF | ALIGNOF
3177 | TYPESPEC | TYPE_QUAL
3178 ;
3180 keyworddecl:
3181 selector ':' '(' typename ')' identifier
3182 {
3183 $$ = build_keyword_decl ($1, $4, $6);
3184 }
3186 | selector ':' identifier
3187 {
3188 $$ = build_keyword_decl ($1, NULL_TREE, $3);
3189 }
3191 | ':' '(' typename ')' identifier
3192 {
3193 $$ = build_keyword_decl (NULL_TREE, $3, $5);
3194 }
3196 | ':' identifier
3197 {
3198 $$ = build_keyword_decl (NULL_TREE, NULL_TREE, $2);
3199 }
3200 ;
3202 messageargs:
3203 selector
3204 | keywordarglist
3205 ;
3207 keywordarglist:
3208 keywordarg
3209 | keywordarglist keywordarg
3210 {
3211 $$ = chainon ($1, $2);
3212 }
3213 ;
3216 keywordexpr:
3217 nonnull_exprlist
3218 {
3219 if (TREE_CHAIN ($1) == NULL_TREE)
3220 /* just return the expr., remove a level of indirection */
3221 $$ = TREE_VALUE ($1);
3222 else
3223 /* we have a comma expr., we will collapse later */
3224 $$ = $1;
3225 }
3226 ;
3228 keywordarg:
3229 selector ':' keywordexpr
3230 {
3231 $$ = build_tree_list ($1, $3);
3232 }
3233 | ':' keywordexpr
3234 {
3235 $$ = build_tree_list (NULL_TREE, $2);
3236 }
3237 ;
3239 receiver:
3240 expr
3241 | CLASSNAME
3242 {
3243 $$ = get_class_reference ($1);
3244 }
3245 ;
3247 objcmessageexpr:
3248 '['
3249 { objc_receiver_context = 1; }
3250 receiver
3251 { objc_receiver_context = 0; }
3252 messageargs ']'
3253 {
3254 $$ = build_tree_list ($3, $5);
3255 }
3256 ;
3258 selectorarg:
3259 selector
3260 | keywordnamelist
3261 ;
3263 keywordnamelist:
3264 keywordname
3265 | keywordnamelist keywordname
3266 {
3267 $$ = chainon ($1, $2);
3268 }
3269 ;
3271 keywordname:
3272 selector ':'
3273 {
3274 $$ = build_tree_list ($1, NULL_TREE);
3275 }
3276 | ':'
3277 {
3278 $$ = build_tree_list (NULL_TREE, NULL_TREE);
3279 }
3280 ;
3282 objcselectorexpr:
3283 SELECTOR '(' selectorarg ')'
3284 {
3285 $$ = $3;
3286 }
3287 ;
3289 objcprotocolexpr:
3290 PROTOCOL '(' identifier ')'
3291 {
3292 $$ = $3;
3293 }
3294 ;
3296 /* extension to support C-structures in the archiver */
3298 objcencodeexpr:
3299 ENCODE '(' typename ')'
3300 {
3301 $$ = groktypename ($3);
3302 }
3303 ;
3305 end ifobjc
3306 %%
3308 /* yylex() is a thin wrapper around c_lex(), all it does is translate
3309 cpplib.h's token codes into yacc's token codes. */
3311 static enum cpp_ttype last_token;
3313 /* The reserved keyword table. */
3314 struct resword
3315 {
3316 const char *word;
3317 ENUM_BITFIELD(rid) rid : 16;
3318 unsigned int disable : 16;
3319 };
3321 /* Disable mask. Keywords are disabled if (reswords[i].disable & mask) is
3322 _true_. */
3323 #define D_TRAD 0x01 /* not in traditional C */
3324 #define D_C89 0x02 /* not in C89 */
3325 #define D_EXT 0x04 /* GCC extension */
3326 #define D_EXT89 0x08 /* GCC extension incorporated in C99 */
3327 #define D_OBJC 0x10 /* Objective C only */
3329 static const struct resword reswords[] =
3330 {
3331 { "_Bool", RID_BOOL, 0 },
3332 { "_Complex", RID_COMPLEX, 0 },
3333 { "__FUNCTION__", RID_FUNCTION_NAME, 0 },
3334 { "__PRETTY_FUNCTION__", RID_PRETTY_FUNCTION_NAME, 0 },
3335 { "__alignof", RID_ALIGNOF, 0 },
3336 { "__alignof__", RID_ALIGNOF, 0 },
3337 { "__asm", RID_ASM, 0 },
3338 { "__asm__", RID_ASM, 0 },
3339 { "__attribute", RID_ATTRIBUTE, 0 },
3340 { "__attribute__", RID_ATTRIBUTE, 0 },
3341 { "__bounded", RID_BOUNDED, 0 },
3342 { "__bounded__", RID_BOUNDED, 0 },
3343 { "__builtin_va_arg", RID_VA_ARG, 0 },
3344 { "__complex", RID_COMPLEX, 0 },
3345 { "__complex__", RID_COMPLEX, 0 },
3346 { "__const", RID_CONST, 0 },
3347 { "__const__", RID_CONST, 0 },
3348 { "__extension__", RID_EXTENSION, 0 },
3349 { "__func__", RID_C99_FUNCTION_NAME, 0 },
3350 { "__imag", RID_IMAGPART, 0 },
3351 { "__imag__", RID_IMAGPART, 0 },
3352 { "__inline", RID_INLINE, 0 },
3353 { "__inline__", RID_INLINE, 0 },
3354 { "__label__", RID_LABEL, 0 },
3355 { "__ptrbase", RID_PTRBASE, 0 },
3356 { "__ptrbase__", RID_PTRBASE, 0 },
3357 { "__ptrextent", RID_PTREXTENT, 0 },
3358 { "__ptrextent__", RID_PTREXTENT, 0 },
3359 { "__ptrvalue", RID_PTRVALUE, 0 },
3360 { "__ptrvalue__", RID_PTRVALUE, 0 },
3361 { "__real", RID_REALPART, 0 },
3362 { "__real__", RID_REALPART, 0 },
3363 { "__restrict", RID_RESTRICT, 0 },
3364 { "__restrict__", RID_RESTRICT, 0 },
3365 { "__signed", RID_SIGNED, 0 },
3366 { "__signed__", RID_SIGNED, 0 },
3367 { "__typeof", RID_TYPEOF, 0 },
3368 { "__typeof__", RID_TYPEOF, 0 },
3369 { "__unbounded", RID_UNBOUNDED, 0 },
3370 { "__unbounded__", RID_UNBOUNDED, 0 },
3371 { "__volatile", RID_VOLATILE, 0 },
3372 { "__volatile__", RID_VOLATILE, 0 },
3373 { "asm", RID_ASM, D_EXT },
3374 { "auto", RID_AUTO, 0 },
3375 { "break", RID_BREAK, 0 },
3376 { "case", RID_CASE, 0 },
3377 { "char", RID_CHAR, 0 },
3378 { "const", RID_CONST, D_TRAD },
3379 { "continue", RID_CONTINUE, 0 },
3380 { "default", RID_DEFAULT, 0 },
3381 { "do", RID_DO, 0 },
3382 { "double", RID_DOUBLE, 0 },
3383 { "else", RID_ELSE, 0 },
3384 { "enum", RID_ENUM, 0 },
3385 { "extern", RID_EXTERN, 0 },
3386 { "float", RID_FLOAT, 0 },
3387 { "for", RID_FOR, 0 },
3388 { "goto", RID_GOTO, 0 },
3389 { "if", RID_IF, 0 },
3390 { "inline", RID_INLINE, D_TRAD|D_EXT89 },
3391 { "int", RID_INT, 0 },
3392 { "long", RID_LONG, 0 },
3393 { "register", RID_REGISTER, 0 },
3394 { "restrict", RID_RESTRICT, D_TRAD|D_C89 },
3395 { "return", RID_RETURN, 0 },
3396 { "short", RID_SHORT, 0 },
3397 { "signed", RID_SIGNED, D_TRAD },
3398 { "sizeof", RID_SIZEOF, 0 },
3399 { "static", RID_STATIC, 0 },
3400 { "struct", RID_STRUCT, 0 },
3401 { "switch", RID_SWITCH, 0 },
3402 { "typedef", RID_TYPEDEF, 0 },
3403 { "typeof", RID_TYPEOF, D_TRAD|D_EXT },
3404 { "union", RID_UNION, 0 },
3405 { "unsigned", RID_UNSIGNED, 0 },
3406 { "void", RID_VOID, 0 },
3407 { "volatile", RID_VOLATILE, D_TRAD },
3408 { "while", RID_WHILE, 0 },
3409 ifobjc
3410 { "@class", RID_AT_CLASS, D_OBJC },
3411 { "@compatibility_alias", RID_AT_ALIAS, D_OBJC },
3412 { "@defs", RID_AT_DEFS, D_OBJC },
3413 { "@encode", RID_AT_ENCODE, D_OBJC },
3414 { "@end", RID_AT_END, D_OBJC },
3415 { "@implementation", RID_AT_IMPLEMENTATION, D_OBJC },
3416 { "@interface", RID_AT_INTERFACE, D_OBJC },
3417 { "@private", RID_AT_PRIVATE, D_OBJC },
3418 { "@protected", RID_AT_PROTECTED, D_OBJC },
3419 { "@protocol", RID_AT_PROTOCOL, D_OBJC },
3420 { "@public", RID_AT_PUBLIC, D_OBJC },
3421 { "@selector", RID_AT_SELECTOR, D_OBJC },
3422 { "id", RID_ID, D_OBJC },
3423 { "bycopy", RID_BYCOPY, D_OBJC },
3424 { "byref", RID_BYREF, D_OBJC },
3425 { "in", RID_IN, D_OBJC },
3426 { "inout", RID_INOUT, D_OBJC },
3427 { "oneway", RID_ONEWAY, D_OBJC },
3428 { "out", RID_OUT, D_OBJC },
3429 end ifobjc
3430 };
3431 #define N_reswords (sizeof reswords / sizeof (struct resword))
3433 /* Table mapping from RID_* constants to yacc token numbers.
3434 Unfortunately we have to have entries for all the keywords in all
3435 three languages. */
3436 static const short rid_to_yy[RID_MAX] =
3437 {
3438 /* RID_STATIC */ SCSPEC,
3439 /* RID_UNSIGNED */ TYPESPEC,
3440 /* RID_LONG */ TYPESPEC,
3441 /* RID_CONST */ TYPE_QUAL,
3442 /* RID_EXTERN */ SCSPEC,
3443 /* RID_REGISTER */ SCSPEC,
3444 /* RID_TYPEDEF */ SCSPEC,
3445 /* RID_SHORT */ TYPESPEC,
3446 /* RID_INLINE */ SCSPEC,
3447 /* RID_VOLATILE */ TYPE_QUAL,
3448 /* RID_SIGNED */ TYPESPEC,
3449 /* RID_AUTO */ SCSPEC,
3450 /* RID_RESTRICT */ TYPE_QUAL,
3452 /* C extensions */
3453 /* RID_BOUNDED */ TYPE_QUAL,
3454 /* RID_UNBOUNDED */ TYPE_QUAL,
3455 /* RID_COMPLEX */ TYPESPEC,
3457 /* C++ */
3458 /* RID_FRIEND */ 0,
3459 /* RID_VIRTUAL */ 0,
3460 /* RID_EXPLICIT */ 0,
3461 /* RID_EXPORT */ 0,
3462 /* RID_MUTABLE */ 0,
3464 /* ObjC */
3465 /* RID_IN */ TYPE_QUAL,
3466 /* RID_OUT */ TYPE_QUAL,
3467 /* RID_INOUT */ TYPE_QUAL,
3468 /* RID_BYCOPY */ TYPE_QUAL,
3469 /* RID_BYREF */ TYPE_QUAL,
3470 /* RID_ONEWAY */ TYPE_QUAL,
3472 /* C */
3473 /* RID_INT */ TYPESPEC,
3474 /* RID_CHAR */ TYPESPEC,
3475 /* RID_FLOAT */ TYPESPEC,
3476 /* RID_DOUBLE */ TYPESPEC,
3477 /* RID_VOID */ TYPESPEC,
3478 /* RID_ENUM */ ENUM,
3479 /* RID_STRUCT */ STRUCT,
3480 /* RID_UNION */ UNION,
3481 /* RID_IF */ IF,
3482 /* RID_ELSE */ ELSE,
3483 /* RID_WHILE */ WHILE,
3484 /* RID_DO */ DO,
3485 /* RID_FOR */ FOR,
3486 /* RID_SWITCH */ SWITCH,
3487 /* RID_CASE */ CASE,
3488 /* RID_DEFAULT */ DEFAULT,
3489 /* RID_BREAK */ BREAK,
3490 /* RID_CONTINUE */ CONTINUE,
3491 /* RID_RETURN */ RETURN,
3492 /* RID_GOTO */ GOTO,
3493 /* RID_SIZEOF */ SIZEOF,
3495 /* C extensions */
3496 /* RID_ASM */ ASM_KEYWORD,
3497 /* RID_TYPEOF */ TYPEOF,
3498 /* RID_ALIGNOF */ ALIGNOF,
3499 /* RID_ATTRIBUTE */ ATTRIBUTE,
3500 /* RID_VA_ARG */ VA_ARG,
3501 /* RID_EXTENSION */ EXTENSION,
3502 /* RID_IMAGPART */ IMAGPART,
3503 /* RID_REALPART */ REALPART,
3504 /* RID_LABEL */ LABEL,
3505 /* RID_PTRBASE */ PTR_BASE,
3506 /* RID_PTREXTENT */ PTR_EXTENT,
3507 /* RID_PTRVALUE */ PTR_VALUE,
3509 /* RID_FUNCTION_NAME */ STRING_FUNC_NAME,
3510 /* RID_PRETTY_FUNCTION_NAME */ STRING_FUNC_NAME,
3511 /* RID_C99_FUNCTION_NAME */ VAR_FUNC_NAME,
3513 /* C++ */
3514 /* RID_BOOL */ TYPESPEC,
3515 /* RID_WCHAR */ 0,
3516 /* RID_CLASS */ 0,
3517 /* RID_PUBLIC */ 0,
3518 /* RID_PRIVATE */ 0,
3519 /* RID_PROTECTED */ 0,
3520 /* RID_TEMPLATE */ 0,
3521 /* RID_NULL */ 0,
3522 /* RID_CATCH */ 0,
3523 /* RID_DELETE */ 0,
3524 /* RID_FALSE */ 0,
3525 /* RID_NAMESPACE */ 0,
3526 /* RID_NEW */ 0,
3527 /* RID_OPERATOR */ 0,
3528 /* RID_THIS */ 0,
3529 /* RID_THROW */ 0,
3530 /* RID_TRUE */ 0,
3531 /* RID_TRY */ 0,
3532 /* RID_TYPENAME */ 0,
3533 /* RID_TYPEID */ 0,
3534 /* RID_USING */ 0,
3536 /* casts */
3537 /* RID_CONSTCAST */ 0,
3538 /* RID_DYNCAST */ 0,
3539 /* RID_REINTCAST */ 0,
3540 /* RID_STATCAST */ 0,
3542 /* alternate spellings */
3543 /* RID_AND */ 0,
3544 /* RID_AND_EQ */ 0,
3545 /* RID_NOT */ 0,
3546 /* RID_NOT_EQ */ 0,
3547 /* RID_OR */ 0,
3548 /* RID_OR_EQ */ 0,
3549 /* RID_XOR */ 0,
3550 /* RID_XOR_EQ */ 0,
3551 /* RID_BITAND */ 0,
3552 /* RID_BITOR */ 0,
3553 /* RID_COMPL */ 0,
3555 /* Objective C */
3556 /* RID_ID */ OBJECTNAME,
3557 /* RID_AT_ENCODE */ ENCODE,
3558 /* RID_AT_END */ END,
3559 /* RID_AT_CLASS */ CLASS,
3560 /* RID_AT_ALIAS */ ALIAS,
3561 /* RID_AT_DEFS */ DEFS,
3562 /* RID_AT_PRIVATE */ PRIVATE,
3563 /* RID_AT_PROTECTED */ PROTECTED,
3564 /* RID_AT_PUBLIC */ PUBLIC,
3565 /* RID_AT_PROTOCOL */ PROTOCOL,
3566 /* RID_AT_SELECTOR */ SELECTOR,
3567 /* RID_AT_INTERFACE */ INTERFACE,
3568 /* RID_AT_IMPLEMENTATION */ IMPLEMENTATION
3569 };
3571 ifobjc
3572 /* Lookup table for ObjC keywords beginning with '@'. Crude but
3573 hopefully effective. */
3574 #define N_at_reswords ((int) RID_AT_IMPLEMENTATION - (int)RID_AT_ENCODE + 1)
3575 static tree objc_rid_sans_at[N_at_reswords];
3576 end ifobjc
3578 static void
3579 init_reswords ()
3580 {
3581 unsigned int i;
3582 tree id;
3583 int mask = (flag_isoc99 ? 0 : D_C89)
3584 | (flag_traditional ? D_TRAD : 0)
3585 | (flag_no_asm ? (flag_isoc99 ? D_EXT : D_EXT|D_EXT89) : 0);
3587 if (c_language != clk_objective_c)
3588 mask |= D_OBJC;
3590 /* It is not necessary to register ridpointers as a GC root, because
3591 all the trees it points to are permanently interned in the
3592 get_identifier hash anyway. */
3593 ridpointers = (tree *) xcalloc ((int) RID_MAX, sizeof (tree));
3594 for (i = 0; i < N_reswords; i++)
3595 {
3596 /* If a keyword is disabled, do not enter it into the table
3597 and so create a canonical spelling that isn't a keyword. */
3598 if (reswords[i].disable & mask)
3599 continue;
3601 id = get_identifier (reswords[i].word);
3602 C_RID_CODE (id) = reswords[i].rid;
3603 C_IS_RESERVED_WORD (id) = 1;
3604 ridpointers [(int) reswords[i].rid] = id;
3606 ifobjc
3607 /* Enter ObjC @-prefixed keywords into the "sans" table
3608 _without_ their leading at-sign. Again, all these
3609 identifiers are reachable by the get_identifer table, so it's
3610 not necessary to make objc_rid_sans_at a GC root. */
3611 if (reswords[i].word[0] == '@')
3612 objc_rid_sans_at[(int) reswords[i].rid - (int) RID_AT_ENCODE]
3613 = get_identifier (reswords[i].word + 1);
3614 end ifobjc
3615 }
3616 }
3618 const char *
3619 init_parse (filename)
3620 const char *filename;
3621 {
3622 add_c_tree_codes ();
3624 /* Make identifier nodes long enough for the language-specific slots. */
3625 set_identifier_size (sizeof (struct lang_identifier));
3627 init_reswords ();
3628 init_pragma ();
3630 return init_c_lex (filename);
3631 }
3633 void
3634 finish_parse ()
3635 {
3636 cpp_finish (parse_in);
3637 /* Call to cpp_destroy () omitted for performance reasons. */
3638 errorcount += cpp_errors (parse_in);
3639 }
3641 #define NAME(type) cpp_type2name (type)
3643 static void
3644 yyerror (msgid)
3645 const char *msgid;
3646 {
3647 const char *string = _(msgid);
3649 if (last_token == CPP_EOF)
3650 error ("%s at end of input", string);
3651 else if (last_token == CPP_CHAR || last_token == CPP_WCHAR)
3652 {
3653 unsigned int val = TREE_INT_CST_LOW (yylval.ttype);
3654 const char *ell = (last_token == CPP_CHAR) ? "" : "L";
3655 if (val <= UCHAR_MAX && ISGRAPH (val))
3656 error ("%s before %s'%c'", string, ell, val);
3657 else
3658 error ("%s before %s'\\x%x'", string, ell, val);
3659 }
3660 else if (last_token == CPP_STRING
3661 || last_token == CPP_WSTRING)
3662 error ("%s before string constant", string);
3663 else if (last_token == CPP_NUMBER
3664 || last_token == CPP_INT
3665 || last_token == CPP_FLOAT)
3666 error ("%s before numeric constant", string);
3667 else if (last_token == CPP_NAME)
3668 error ("%s before \"%s\"", string, IDENTIFIER_POINTER (yylval.ttype));
3669 else
3670 error ("%s before '%s' token", string, NAME(last_token));
3671 }
3673 static int
3674 yylexname ()
3675 {
3676 tree decl;
3678 if (C_IS_RESERVED_WORD (yylval.ttype))
3679 {
3680 enum rid rid_code = C_RID_CODE (yylval.ttype);
3682 ifobjc
3683 if (!((unsigned int) rid_code - (unsigned int) RID_FIRST_PQ < 6)
3684 || objc_pq_context)
3685 end ifobjc
3686 {
3687 int yycode = rid_to_yy[(int) rid_code];
3688 if (yycode == STRING_FUNC_NAME)
3689 {
3690 /* __FUNCTION__ and __PRETTY_FUNCTION__ get converted
3691 to string constants. */
3692 const char *name = fname_string (rid_code);
3694 yylval.ttype = build_string (strlen (name) + 1, name);
3695 last_token = CPP_STRING; /* so yyerror won't choke */
3696 return STRING;
3697 }
3699 /* Return the canonical spelling for this keyword. */
3700 yylval.ttype = ridpointers[(int) rid_code];
3701 return yycode;
3702 }
3703 }
3705 decl = lookup_name (yylval.ttype);
3706 if (decl)
3707 {
3708 if (TREE_CODE (decl) == TYPE_DECL)
3709 return TYPENAME;
3710 }
3711 ifobjc
3712 else
3713 {
3714 tree objc_interface_decl = is_class_name (yylval.ttype);
3716 if (objc_interface_decl)
3717 {
3718 yylval.ttype = objc_interface_decl;
3719 return CLASSNAME;
3720 }
3721 }
3722 end ifobjc
3724 return IDENTIFIER;
3725 }
3728 static inline int
3729 _yylex ()
3730 {
3731 get_next:
3732 last_token = c_lex (&yylval.ttype);
3733 ifobjc
3734 reconsider:
3735 end ifobjc
3736 switch (last_token)
3737 {
3738 case CPP_EQ: return '=';
3739 case CPP_NOT: return '!';
3740 case CPP_GREATER: yylval.code = GT_EXPR; return ARITHCOMPARE;
3741 case CPP_LESS: yylval.code = LT_EXPR; return ARITHCOMPARE;
3742 case CPP_PLUS: yylval.code = PLUS_EXPR; return '+';
3743 case CPP_MINUS: yylval.code = MINUS_EXPR; return '-';
3744 case CPP_MULT: yylval.code = MULT_EXPR; return '*';
3745 case CPP_DIV: yylval.code = TRUNC_DIV_EXPR; return '/';
3746 case CPP_MOD: yylval.code = TRUNC_MOD_EXPR; return '%';
3747 case CPP_AND: yylval.code = BIT_AND_EXPR; return '&';
3748 case CPP_OR: yylval.code = BIT_IOR_EXPR; return '|';
3749 case CPP_XOR: yylval.code = BIT_XOR_EXPR; return '^';
3750 case CPP_RSHIFT: yylval.code = RSHIFT_EXPR; return RSHIFT;
3751 case CPP_LSHIFT: yylval.code = LSHIFT_EXPR; return LSHIFT;
3753 case CPP_COMPL: return '~';
3754 case CPP_AND_AND: return ANDAND;
3755 case CPP_OR_OR: return OROR;
3756 case CPP_QUERY: return '?';
3757 case CPP_COLON: return ':';
3758 case CPP_COMMA: return ',';
3759 case CPP_OPEN_PAREN: return '(';
3760 case CPP_CLOSE_PAREN: return ')';
3761 case CPP_EQ_EQ: yylval.code = EQ_EXPR; return EQCOMPARE;
3762 case CPP_NOT_EQ: yylval.code = NE_EXPR; return EQCOMPARE;
3763 case CPP_GREATER_EQ:yylval.code = GE_EXPR; return ARITHCOMPARE;
3764 case CPP_LESS_EQ: yylval.code = LE_EXPR; return ARITHCOMPARE;
3766 case CPP_PLUS_EQ: yylval.code = PLUS_EXPR; return ASSIGN;
3767 case CPP_MINUS_EQ: yylval.code = MINUS_EXPR; return ASSIGN;
3768 case CPP_MULT_EQ: yylval.code = MULT_EXPR; return ASSIGN;
3769 case CPP_DIV_EQ: yylval.code = TRUNC_DIV_EXPR; return ASSIGN;
3770 case CPP_MOD_EQ: yylval.code = TRUNC_MOD_EXPR; return ASSIGN;
3771 case CPP_AND_EQ: yylval.code = BIT_AND_EXPR; return ASSIGN;
3772 case CPP_OR_EQ: yylval.code = BIT_IOR_EXPR; return ASSIGN;
3773 case CPP_XOR_EQ: yylval.code = BIT_XOR_EXPR; return ASSIGN;
3774 case CPP_RSHIFT_EQ: yylval.code = RSHIFT_EXPR; return ASSIGN;
3775 case CPP_LSHIFT_EQ: yylval.code = LSHIFT_EXPR; return ASSIGN;
3777 case CPP_OPEN_SQUARE: return '[';
3778 case CPP_CLOSE_SQUARE: return ']';
3779 case CPP_OPEN_BRACE: return '{';
3780 case CPP_CLOSE_BRACE: return '}';
3781 case CPP_SEMICOLON: return ';';
3782 case CPP_ELLIPSIS: return ELLIPSIS;
3784 case CPP_PLUS_PLUS: return PLUSPLUS;
3785 case CPP_MINUS_MINUS: return MINUSMINUS;
3786 case CPP_DEREF: return POINTSAT;
3787 case CPP_DOT: return '.';
3789 case CPP_EOF:
3790 if (cpp_pop_buffer (parse_in) == 0)
3791 return 0;
3792 goto get_next;
3794 case CPP_NAME:
3795 return yylexname ();
3797 case CPP_INT:
3798 case CPP_FLOAT:
3799 case CPP_NUMBER:
3800 case CPP_CHAR:
3801 case CPP_WCHAR:
3802 return CONSTANT;
3804 case CPP_STRING:
3805 case CPP_WSTRING:
3806 return STRING;
3808 /* This token is Objective-C specific. It gives the next
3809 token special significance. */
3810 case CPP_ATSIGN:
3811 ifobjc
3812 last_token = c_lex (&yylval.ttype);
3813 if (last_token == CPP_STRING)
3814 return OBJC_STRING;
3815 else if (last_token == CPP_NAME)
3816 {
3817 int i;
3818 for (i = 0; i < N_at_reswords; i++)
3819 if (objc_rid_sans_at[i] == yylval.ttype)
3820 {
3821 int rid_code = i + (int) RID_AT_ENCODE;
3822 yylval.ttype = ridpointers[rid_code];
3823 return rid_to_yy[rid_code];
3824 }
3825 }
3826 error ("syntax error at '@' token");
3827 goto reconsider;
3828 end ifobjc
3829 /* These tokens are C++ specific (and will not be generated
3830 in C mode, but let's be cautious). */
3831 case CPP_SCOPE:
3832 case CPP_DEREF_STAR:
3833 case CPP_DOT_STAR:
3834 case CPP_MIN_EQ:
3835 case CPP_MAX_EQ:
3836 case CPP_MIN:
3837 case CPP_MAX:
3838 /* These tokens should not survive translation phase 4. */
3839 case CPP_HASH:
3840 case CPP_PASTE:
3841 error ("syntax error at '%s' token", NAME(last_token));
3842 goto get_next;
3844 default:
3845 abort ();
3846 }
3847 /* NOTREACHED */
3848 }
3850 static int
3851 yylex()
3852 {
3853 int r;
3854 timevar_push (TV_LEX);
3855 r = _yylex();
3856 timevar_pop (TV_LEX);
3857 return r;
3858 }
3860 /* Sets the value of the 'yydebug' variable to VALUE.
3861 This is a function so we don't have to have YYDEBUG defined
3862 in order to build the compiler. */
3864 void
3865 set_yydebug (value)
3866 int value;
3867 {
3868 #if YYDEBUG != 0
3869 yydebug = value;
3870 #else
3871 warning ("YYDEBUG not defined.");
3872 #endif
3873 }
3875 /* Function used when yydebug is set, to print a token in more detail. */
3877 static void
3878 yyprint (file, yychar, yyl)
3879 FILE *file;
3880 int yychar;
3881 YYSTYPE yyl;
3882 {
3883 tree t = yyl.ttype;
3885 fprintf (file, " [%s]", NAME(last_token));
3887 switch (yychar)
3888 {
3889 case IDENTIFIER:
3890 case TYPENAME:
3891 case OBJECTNAME:
3892 case TYPESPEC:
3893 case TYPE_QUAL:
3894 case SCSPEC:
3895 if (IDENTIFIER_POINTER (t))
3896 fprintf (file, " `%s'", IDENTIFIER_POINTER (t));
3897 break;
3899 case CONSTANT:
3900 fprintf (file, " %s", GET_MODE_NAME (TYPE_MODE (TREE_TYPE (t))));
3901 if (TREE_CODE (t) == INTEGER_CST)
3902 fprintf (file,
3903 #if HOST_BITS_PER_WIDE_INT == 64
3904 #if HOST_BITS_PER_WIDE_INT == HOST_BITS_PER_INT
3905 " 0x%x%016x",
3906 #else
3907 #if HOST_BITS_PER_WIDE_INT == HOST_BITS_PER_LONG
3908 " 0x%lx%016lx",
3909 #else
3910 " 0x%llx%016llx",
3911 #endif
3912 #endif
3913 #else
3914 #if HOST_BITS_PER_WIDE_INT != HOST_BITS_PER_INT
3915 " 0x%lx%08lx",
3916 #else
3917 " 0x%x%08x",
3918 #endif
3919 #endif
3920 TREE_INT_CST_HIGH (t), TREE_INT_CST_LOW (t));
3921 break;
3922 }
3923 }
3924 \f
3925 /* This is not the ideal place to put these, but we have to get them out
3926 of c-lex.c because cp/lex.c has its own versions. */
3928 /* Return something to represent absolute declarators containing a *.
3929 TARGET is the absolute declarator that the * contains.
3930 TYPE_QUALS is a list of modifiers such as const or volatile
3931 to apply to the pointer type, represented as identifiers.
3933 We return an INDIRECT_REF whose "contents" are TARGET
3934 and whose type is the modifier list. */
3936 tree
3937 make_pointer_declarator (type_quals, target)
3938 tree type_quals, target;
3939 {
3940 return build1 (INDIRECT_REF, type_quals, target);
3941 }