| blob | 253cb292b66d82279e78807990e8adf46c80f46b |
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"
55 #ifdef MULTIBYTE_CHARS
56 #include <locale.h>
57 #endif
59 ifobjc
60 #include "objc-act.h"
61 end ifobjc
63 /* Since parsers are distinct for each language, put the language string
64 definition here. */
65 ifobjc
66 const char * const language_string = "GNU Objective-C";
67 end ifobjc
68 ifc
69 const char * const language_string = "GNU C";
70 end ifc
72 /* Like YYERROR but do call yyerror. */
73 #define YYERROR1 { yyerror ("syntax error"); YYERROR; }
75 /* Cause the "yydebug" variable to be defined. */
76 #define YYDEBUG 1
78 /* Rename the "yyparse" function so that we can override it elsewhere. */
79 #define yyparse yyparse_1
80 %}
82 %start program
84 %union {long itype; tree ttype; enum tree_code code;
85 const char *filename; int lineno; }
87 /* All identifiers that are not reserved words
88 and are not declared typedefs in the current block */
89 %token IDENTIFIER
91 /* All identifiers that are declared typedefs in the current block.
92 In some contexts, they are treated just like IDENTIFIER,
93 but they can also serve as typespecs in declarations. */
94 %token TYPENAME
96 /* Reserved words that specify storage class.
97 yylval contains an IDENTIFIER_NODE which indicates which one. */
98 %token SCSPEC
100 /* Reserved words that specify type.
101 yylval contains an IDENTIFIER_NODE which indicates which one. */
102 %token TYPESPEC
104 /* Reserved words that qualify type: "const", "volatile", or "restrict".
105 yylval contains an IDENTIFIER_NODE which indicates which one. */
106 %token TYPE_QUAL
108 /* Character or numeric constants.
109 yylval is the node for the constant. */
110 %token CONSTANT
112 /* String constants in raw form.
113 yylval is a STRING_CST node. */
114 %token STRING
116 /* "...", used for functions with variable arglists. */
117 %token ELLIPSIS
119 /* the reserved words */
120 /* SCO include files test "ASM", so use something else. */
121 %token SIZEOF ENUM STRUCT UNION IF ELSE WHILE DO FOR SWITCH CASE DEFAULT
122 %token BREAK CONTINUE RETURN GOTO ASM_KEYWORD TYPEOF ALIGNOF
123 %token ATTRIBUTE EXTENSION LABEL
124 %token REALPART IMAGPART VA_ARG
125 %token PTR_VALUE PTR_BASE PTR_EXTENT
127 /* function name can be a string const or a var decl. */
128 %token STRING_FUNC_NAME VAR_FUNC_NAME
130 /* Add precedence rules to solve dangling else s/r conflict */
131 %nonassoc IF
132 %nonassoc ELSE
134 /* Define the operator tokens and their precedences.
135 The value is an integer because, if used, it is the tree code
136 to use in the expression made from the operator. */
138 %right <code> ASSIGN '='
139 %right <code> '?' ':'
140 %left <code> OROR
141 %left <code> ANDAND
142 %left <code> '|'
143 %left <code> '^'
144 %left <code> '&'
145 %left <code> EQCOMPARE
146 %left <code> ARITHCOMPARE
147 %left <code> LSHIFT RSHIFT
148 %left <code> '+' '-'
149 %left <code> '*' '/' '%'
150 %right <code> UNARY PLUSPLUS MINUSMINUS
151 %left HYPERUNARY
152 %left <code> POINTSAT '.' '(' '['
154 /* The Objective-C keywords. These are included in C and in
155 Objective C, so that the token codes are the same in both. */
156 %token INTERFACE IMPLEMENTATION END SELECTOR DEFS ENCODE
157 %token CLASSNAME PUBLIC PRIVATE PROTECTED PROTOCOL OBJECTNAME CLASS ALIAS
159 /* Objective-C string constants in raw form.
160 yylval is an STRING_CST node. */
161 %token OBJC_STRING
164 %type <code> unop
165 %type <ttype> ENUM STRUCT UNION IF ELSE WHILE DO FOR SWITCH CASE DEFAULT
166 %type <ttype> BREAK CONTINUE RETURN GOTO ASM_KEYWORD SIZEOF TYPEOF ALIGNOF
168 %type <ttype> identifier IDENTIFIER TYPENAME CONSTANT expr nonnull_exprlist exprlist
169 %type <ttype> expr_no_commas cast_expr unary_expr primary string STRING
170 %type <ttype> declspecs_nosc_nots_nosa_noea declspecs_nosc_nots_nosa_ea
171 %type <ttype> declspecs_nosc_nots_sa_noea declspecs_nosc_nots_sa_ea
172 %type <ttype> declspecs_nosc_ts_nosa_noea declspecs_nosc_ts_nosa_ea
173 %type <ttype> declspecs_nosc_ts_sa_noea declspecs_nosc_ts_sa_ea
174 %type <ttype> declspecs_sc_nots_nosa_noea declspecs_sc_nots_nosa_ea
175 %type <ttype> declspecs_sc_nots_sa_noea declspecs_sc_nots_sa_ea
176 %type <ttype> declspecs_sc_ts_nosa_noea declspecs_sc_ts_nosa_ea
177 %type <ttype> declspecs_sc_ts_sa_noea declspecs_sc_ts_sa_ea
178 %type <ttype> declspecs_ts declspecs_nots
179 %type <ttype> declspecs_ts_nosa declspecs_nots_nosa
180 %type <ttype> declspecs_nosc_ts declspecs_nosc_nots declspecs_nosc declspecs
181 %type <ttype> maybe_type_quals_setattrs typespec_nonattr typespec_attr
182 %type <ttype> typespec_reserved_nonattr typespec_reserved_attr
183 %type <ttype> typespec_nonreserved_nonattr
185 %type <ttype> SCSPEC TYPESPEC TYPE_QUAL maybe_type_qual
186 %type <ttype> initdecls notype_initdecls initdcl notype_initdcl
187 %type <ttype> init maybeasm
188 %type <ttype> asm_operands nonnull_asm_operands asm_operand asm_clobbers
189 %type <ttype> maybe_attribute attributes attribute attribute_list attrib
190 %type <ttype> maybe_setattrs
191 %type <ttype> any_word extension
193 %type <ttype> compstmt compstmt_start compstmt_nostart compstmt_primary_start
194 %type <ttype> do_stmt_start poplevel stmt label
196 %type <ttype> c99_block_start c99_block_end
197 %type <ttype> declarator
198 %type <ttype> notype_declarator after_type_declarator
199 %type <ttype> parm_declarator
201 %type <ttype> structsp_attr structsp_nonattr
202 %type <ttype> component_decl_list component_decl_list2
203 %type <ttype> component_decl components components_notype component_declarator
204 %type <ttype> component_notype_declarator
205 %type <ttype> enumlist enumerator
206 %type <ttype> struct_head union_head enum_head
207 %type <ttype> typename absdcl absdcl1 absdcl1_ea absdcl1_noea
208 %type <ttype> direct_absdcl1 absdcl_maybe_attribute
209 %type <ttype> xexpr parms parm firstparm identifiers
211 %type <ttype> parmlist parmlist_1 parmlist_2
212 %type <ttype> parmlist_or_identifiers parmlist_or_identifiers_1
213 %type <ttype> identifiers_or_typenames
215 %type <itype> setspecs setspecs_fp
217 %type <filename> save_filename
218 %type <lineno> save_lineno
219 \f
220 ifobjc
221 /* the Objective-C nonterminals */
223 %type <ttype> ivar_decl_list ivar_decls ivar_decl ivars ivar_declarator
224 %type <ttype> methoddecl unaryselector keywordselector selector
225 %type <ttype> keyworddecl receiver objcmessageexpr messageargs
226 %type <ttype> keywordexpr keywordarglist keywordarg
227 %type <ttype> myparms myparm optparmlist reservedwords objcselectorexpr
228 %type <ttype> selectorarg keywordnamelist keywordname objcencodeexpr
229 %type <ttype> objc_string non_empty_protocolrefs protocolrefs identifier_list objcprotocolexpr
231 %type <ttype> CLASSNAME OBJC_STRING OBJECTNAME
232 end ifobjc
233 \f
234 %{
235 /* Number of statements (loosely speaking) and compound statements
236 seen so far. */
237 static int stmt_count;
238 static int compstmt_count;
240 /* Input file and line number of the end of the body of last simple_if;
241 used by the stmt-rule immediately after simple_if returns. */
242 static const char *if_stmt_file;
243 static int if_stmt_line;
245 /* List of types and structure classes of the current declaration. */
246 static tree current_declspecs = NULL_TREE;
247 static tree prefix_attributes = NULL_TREE;
249 /* Stack of saved values of current_declspecs and prefix_attributes. */
250 static tree declspec_stack;
252 /* For __extension__, save/restore the warning flags which are
253 controlled by __extension__. */
254 #define SAVE_WARN_FLAGS() \
255 size_int (pedantic | (warn_pointer_arith << 1))
256 #define RESTORE_WARN_FLAGS(tval) \
257 do { \
258 int val = tree_low_cst (tval, 0); \
259 pedantic = val & 1; \
260 warn_pointer_arith = (val >> 1) & 1; \
261 } while (0)
263 ifobjc
264 /* Objective-C specific information */
266 tree objc_interface_context;
267 tree objc_implementation_context;
268 tree objc_method_context;
269 tree objc_ivar_chain;
270 tree objc_ivar_context;
271 enum tree_code objc_inherit_code;
272 int objc_receiver_context;
273 int objc_public_flag;
275 end ifobjc
277 /* Tell yyparse how to print a token's value, if yydebug is set. */
279 #define YYPRINT(FILE,YYCHAR,YYLVAL) yyprint(FILE,YYCHAR,YYLVAL)
281 static void yyprint PARAMS ((FILE *, int, YYSTYPE));
282 static void yyerror PARAMS ((const char *));
283 static int yylexname PARAMS ((void));
284 static inline int _yylex PARAMS ((void));
285 static int yylex PARAMS ((void));
286 static void init_reswords PARAMS ((void));
288 /* Add GC roots for variables local to this file. */
289 void
290 c_parse_init ()
291 {
292 ggc_add_tree_root (&declspec_stack, 1);
293 ggc_add_tree_root (¤t_declspecs, 1);
294 ggc_add_tree_root (&prefix_attributes, 1);
295 ifobjc
296 ggc_add_tree_root (&objc_interface_context, 1);
297 ggc_add_tree_root (&objc_implementation_context, 1);
298 ggc_add_tree_root (&objc_method_context, 1);
299 ggc_add_tree_root (&objc_ivar_chain, 1);
300 ggc_add_tree_root (&objc_ivar_context, 1);
301 end ifobjc
302 }
304 %}
305 \f
306 %%
307 program: /* empty */
308 { if (pedantic)
309 pedwarn ("ISO C forbids an empty source file");
310 finish_file ();
311 }
312 | extdefs
313 {
314 /* In case there were missing closebraces,
315 get us back to the global binding level. */
316 while (! global_bindings_p ())
317 poplevel (0, 0, 0);
318 ifc
319 finish_fname_decls ();
320 end ifc
321 finish_file ();
322 }
323 ;
325 /* the reason for the strange actions in this rule
326 is so that notype_initdecls when reached via datadef
327 can find a valid list of type and sc specs in $0. */
329 extdefs:
330 {$<ttype>$ = NULL_TREE; } extdef
331 | extdefs {$<ttype>$ = NULL_TREE; ggc_collect(); } extdef
332 ;
334 extdef:
335 fndef
336 | datadef
337 ifobjc
338 | objcdef
339 end ifobjc
340 | ASM_KEYWORD '(' expr ')' ';'
341 { STRIP_NOPS ($3);
342 if ((TREE_CODE ($3) == ADDR_EXPR
343 && TREE_CODE (TREE_OPERAND ($3, 0)) == STRING_CST)
344 || TREE_CODE ($3) == STRING_CST)
345 assemble_asm ($3);
346 else
347 error ("argument of `asm' is not a constant string"); }
348 | extension extdef
349 { RESTORE_WARN_FLAGS ($1); }
350 ;
352 datadef:
353 setspecs notype_initdecls ';'
354 { if (pedantic)
355 error ("ISO C forbids data definition with no type or storage class");
356 else if (!flag_traditional)
357 warning ("data definition has no type or storage class");
359 current_declspecs = TREE_VALUE (declspec_stack);
360 prefix_attributes = TREE_PURPOSE (declspec_stack);
361 declspec_stack = TREE_CHAIN (declspec_stack); }
362 | declspecs_nots setspecs notype_initdecls ';'
363 { current_declspecs = TREE_VALUE (declspec_stack);
364 prefix_attributes = TREE_PURPOSE (declspec_stack);
365 declspec_stack = TREE_CHAIN (declspec_stack); }
366 | declspecs_ts setspecs initdecls ';'
367 { current_declspecs = TREE_VALUE (declspec_stack);
368 prefix_attributes = TREE_PURPOSE (declspec_stack);
369 declspec_stack = TREE_CHAIN (declspec_stack); }
370 | declspecs ';'
371 { shadow_tag ($1); }
372 | error ';'
373 | error '}'
374 | ';'
375 { if (pedantic)
376 pedwarn ("ISO C does not allow extra `;' outside of a function"); }
377 ;
378 \f
379 fndef:
380 declspecs_ts setspecs declarator
381 { if (! start_function (current_declspecs, $3,
382 prefix_attributes, NULL_TREE))
383 YYERROR1;
384 }
385 old_style_parm_decls
386 { store_parm_decls (); }
387 save_filename save_lineno compstmt_or_error
388 { DECL_SOURCE_FILE (current_function_decl) = $7;
389 DECL_SOURCE_LINE (current_function_decl) = $8;
390 finish_function (0);
391 current_declspecs = TREE_VALUE (declspec_stack);
392 prefix_attributes = TREE_PURPOSE (declspec_stack);
393 declspec_stack = TREE_CHAIN (declspec_stack); }
394 | declspecs_ts setspecs declarator error
395 { current_declspecs = TREE_VALUE (declspec_stack);
396 prefix_attributes = TREE_PURPOSE (declspec_stack);
397 declspec_stack = TREE_CHAIN (declspec_stack); }
398 | declspecs_nots setspecs notype_declarator
399 { if (! start_function (current_declspecs, $3,
400 prefix_attributes, NULL_TREE))
401 YYERROR1;
402 }
403 old_style_parm_decls
404 { store_parm_decls (); }
405 save_filename save_lineno compstmt_or_error
406 { DECL_SOURCE_FILE (current_function_decl) = $7;
407 DECL_SOURCE_LINE (current_function_decl) = $8;
408 finish_function (0);
409 current_declspecs = TREE_VALUE (declspec_stack);
410 prefix_attributes = TREE_PURPOSE (declspec_stack);
411 declspec_stack = TREE_CHAIN (declspec_stack); }
412 | declspecs_nots setspecs notype_declarator error
413 { current_declspecs = TREE_VALUE (declspec_stack);
414 prefix_attributes = TREE_PURPOSE (declspec_stack);
415 declspec_stack = TREE_CHAIN (declspec_stack); }
416 | setspecs notype_declarator
417 { if (! start_function (NULL_TREE, $2,
418 prefix_attributes, NULL_TREE))
419 YYERROR1;
420 }
421 old_style_parm_decls
422 { store_parm_decls (); }
423 save_filename save_lineno compstmt_or_error
424 { DECL_SOURCE_FILE (current_function_decl) = $6;
425 DECL_SOURCE_LINE (current_function_decl) = $7;
426 finish_function (0);
427 current_declspecs = TREE_VALUE (declspec_stack);
428 prefix_attributes = TREE_PURPOSE (declspec_stack);
429 declspec_stack = TREE_CHAIN (declspec_stack); }
430 | setspecs notype_declarator error
431 { current_declspecs = TREE_VALUE (declspec_stack);
432 prefix_attributes = TREE_PURPOSE (declspec_stack);
433 declspec_stack = TREE_CHAIN (declspec_stack); }
434 ;
436 identifier:
437 IDENTIFIER
438 | TYPENAME
439 ifobjc
440 | OBJECTNAME
441 | CLASSNAME
442 end ifobjc
443 ;
445 unop: '&'
446 { $$ = ADDR_EXPR; }
447 | '-'
448 { $$ = NEGATE_EXPR; }
449 | '+'
450 { $$ = CONVERT_EXPR;
451 ifc
452 if (warn_traditional && !in_system_header)
453 warning ("traditional C rejects the unary plus operator");
454 end ifc
455 }
456 | PLUSPLUS
457 { $$ = PREINCREMENT_EXPR; }
458 | MINUSMINUS
459 { $$ = PREDECREMENT_EXPR; }
460 | '~'
461 { $$ = BIT_NOT_EXPR; }
462 | '!'
463 { $$ = TRUTH_NOT_EXPR; }
464 ;
466 expr: nonnull_exprlist
467 { $$ = build_compound_expr ($1); }
468 ;
470 exprlist:
471 /* empty */
472 { $$ = NULL_TREE; }
473 | nonnull_exprlist
474 ;
476 nonnull_exprlist:
477 expr_no_commas
478 { $$ = build_tree_list (NULL_TREE, $1); }
479 | nonnull_exprlist ',' expr_no_commas
480 { chainon ($1, build_tree_list (NULL_TREE, $3)); }
481 ;
483 unary_expr:
484 primary
485 | '*' cast_expr %prec UNARY
486 { $$ = build_indirect_ref ($2, "unary *"); }
487 /* __extension__ turns off -pedantic for following primary. */
488 | extension cast_expr %prec UNARY
489 { $$ = $2;
490 RESTORE_WARN_FLAGS ($1); }
491 | unop cast_expr %prec UNARY
492 { $$ = build_unary_op ($1, $2, 0);
493 overflow_warning ($$); }
494 /* Refer to the address of a label as a pointer. */
495 | ANDAND identifier
496 { $$ = finish_label_address_expr ($2); }
497 /* This seems to be impossible on some machines, so let's turn it off.
498 You can use __builtin_next_arg to find the anonymous stack args.
499 | '&' ELLIPSIS
500 { tree types = TYPE_ARG_TYPES (TREE_TYPE (current_function_decl));
501 $$ = error_mark_node;
502 if (TREE_VALUE (tree_last (types)) == void_type_node)
503 error ("`&...' used in function with fixed number of arguments");
504 else
505 {
506 if (pedantic)
507 pedwarn ("ISO C forbids `&...'");
508 $$ = tree_last (DECL_ARGUMENTS (current_function_decl));
509 $$ = build_unary_op (ADDR_EXPR, $$, 0);
510 } }
511 */
512 | sizeof unary_expr %prec UNARY
513 { skip_evaluation--;
514 if (TREE_CODE ($2) == COMPONENT_REF
515 && DECL_C_BIT_FIELD (TREE_OPERAND ($2, 1)))
516 error ("`sizeof' applied to a bit-field");
517 $$ = c_sizeof (TREE_TYPE ($2)); }
518 | sizeof '(' typename ')' %prec HYPERUNARY
519 { skip_evaluation--;
520 $$ = c_sizeof (groktypename ($3)); }
521 | alignof unary_expr %prec UNARY
522 { skip_evaluation--;
523 $$ = c_alignof_expr ($2); }
524 | alignof '(' typename ')' %prec HYPERUNARY
525 { skip_evaluation--;
526 $$ = c_alignof (groktypename ($3)); }
527 | REALPART cast_expr %prec UNARY
528 { $$ = build_unary_op (REALPART_EXPR, $2, 0); }
529 | IMAGPART cast_expr %prec UNARY
530 { $$ = build_unary_op (IMAGPART_EXPR, $2, 0); }
531 ;
533 sizeof:
534 SIZEOF { skip_evaluation++; }
535 ;
537 alignof:
538 ALIGNOF { skip_evaluation++; }
539 ;
541 cast_expr:
542 unary_expr
543 | '(' typename ')' cast_expr %prec UNARY
544 { $$ = c_cast_expr ($2, $4); }
545 ;
547 expr_no_commas:
548 cast_expr
549 | expr_no_commas '+' expr_no_commas
550 { $$ = parser_build_binary_op ($2, $1, $3); }
551 | expr_no_commas '-' expr_no_commas
552 { $$ = parser_build_binary_op ($2, $1, $3); }
553 | expr_no_commas '*' expr_no_commas
554 { $$ = parser_build_binary_op ($2, $1, $3); }
555 | expr_no_commas '/' expr_no_commas
556 { $$ = parser_build_binary_op ($2, $1, $3); }
557 | expr_no_commas '%' expr_no_commas
558 { $$ = parser_build_binary_op ($2, $1, $3); }
559 | expr_no_commas LSHIFT expr_no_commas
560 { $$ = parser_build_binary_op ($2, $1, $3); }
561 | expr_no_commas RSHIFT expr_no_commas
562 { $$ = parser_build_binary_op ($2, $1, $3); }
563 | expr_no_commas ARITHCOMPARE expr_no_commas
564 { $$ = parser_build_binary_op ($2, $1, $3); }
565 | expr_no_commas EQCOMPARE expr_no_commas
566 { $$ = parser_build_binary_op ($2, $1, $3); }
567 | expr_no_commas '&' expr_no_commas
568 { $$ = parser_build_binary_op ($2, $1, $3); }
569 | expr_no_commas '|' expr_no_commas
570 { $$ = parser_build_binary_op ($2, $1, $3); }
571 | expr_no_commas '^' expr_no_commas
572 { $$ = parser_build_binary_op ($2, $1, $3); }
573 | expr_no_commas ANDAND
574 { $1 = truthvalue_conversion (default_conversion ($1));
575 skip_evaluation += $1 == boolean_false_node; }
576 expr_no_commas
577 { skip_evaluation -= $1 == boolean_false_node;
578 $$ = parser_build_binary_op (TRUTH_ANDIF_EXPR, $1, $4); }
579 | expr_no_commas OROR
580 { $1 = truthvalue_conversion (default_conversion ($1));
581 skip_evaluation += $1 == boolean_true_node; }
582 expr_no_commas
583 { skip_evaluation -= $1 == boolean_true_node;
584 $$ = parser_build_binary_op (TRUTH_ORIF_EXPR, $1, $4); }
585 | expr_no_commas '?'
586 { $1 = truthvalue_conversion (default_conversion ($1));
587 skip_evaluation += $1 == boolean_false_node; }
588 expr ':'
589 { skip_evaluation += (($1 == boolean_true_node)
590 - ($1 == boolean_false_node)); }
591 expr_no_commas
592 { skip_evaluation -= $1 == boolean_true_node;
593 $$ = build_conditional_expr ($1, $4, $7); }
594 | expr_no_commas '?'
595 { if (pedantic)
596 pedwarn ("ISO C forbids omitting the middle term of a ?: expression");
597 /* Make sure first operand is calculated only once. */
598 $<ttype>2 = save_expr ($1);
599 $1 = truthvalue_conversion (default_conversion ($<ttype>2));
600 skip_evaluation += $1 == boolean_true_node; }
601 ':' expr_no_commas
602 { skip_evaluation -= $1 == boolean_true_node;
603 $$ = build_conditional_expr ($1, $<ttype>2, $5); }
604 | expr_no_commas '=' expr_no_commas
605 { char class;
606 $$ = build_modify_expr ($1, NOP_EXPR, $3);
607 class = TREE_CODE_CLASS (TREE_CODE ($$));
608 if (class == 'e' || class == '1'
609 || class == '2' || class == '<')
610 C_SET_EXP_ORIGINAL_CODE ($$, MODIFY_EXPR);
611 }
612 | expr_no_commas ASSIGN expr_no_commas
613 { char class;
614 $$ = build_modify_expr ($1, $2, $3);
615 /* This inhibits warnings in truthvalue_conversion. */
616 class = TREE_CODE_CLASS (TREE_CODE ($$));
617 if (class == 'e' || class == '1'
618 || class == '2' || class == '<')
619 C_SET_EXP_ORIGINAL_CODE ($$, ERROR_MARK);
620 }
621 ;
623 primary:
624 IDENTIFIER
625 {
626 if (yychar == YYEMPTY)
627 yychar = YYLEX;
628 $$ = build_external_ref ($1, yychar == '(');
629 }
630 | CONSTANT
631 | string
632 { $$ = combine_strings ($1); }
633 | VAR_FUNC_NAME
634 { $$ = fname_decl (C_RID_CODE ($$), $$); }
635 | '(' typename ')' '{'
636 { start_init (NULL_TREE, NULL, 0);
637 $2 = groktypename ($2);
638 really_start_incremental_init ($2); }
639 initlist_maybe_comma '}' %prec UNARY
640 { const char *name;
641 tree result = pop_init_level (0);
642 tree type = $2;
643 finish_init ();
645 if (pedantic && ! flag_isoc99)
646 pedwarn ("ISO C89 forbids compound literals");
647 if (TYPE_NAME (type) != 0)
648 {
649 if (TREE_CODE (TYPE_NAME (type)) == IDENTIFIER_NODE)
650 name = IDENTIFIER_POINTER (TYPE_NAME (type));
651 else
652 name = IDENTIFIER_POINTER (DECL_NAME (TYPE_NAME (type)));
653 }
654 else
655 name = "";
656 $$ = result;
657 if (TREE_CODE (type) == ARRAY_TYPE && !COMPLETE_TYPE_P (type))
658 {
659 int failure = complete_array_type (type, $$, 1);
660 if (failure)
661 abort ();
662 }
663 }
664 | '(' expr ')'
665 { char class = TREE_CODE_CLASS (TREE_CODE ($2));
666 if (class == 'e' || class == '1'
667 || class == '2' || class == '<')
668 C_SET_EXP_ORIGINAL_CODE ($2, ERROR_MARK);
669 $$ = $2; }
670 | '(' error ')'
671 { $$ = error_mark_node; }
672 | compstmt_primary_start compstmt_nostart ')'
673 { tree saved_last_tree;
675 if (pedantic)
676 pedwarn ("ISO C forbids braced-groups within expressions");
677 pop_label_level ();
679 saved_last_tree = COMPOUND_BODY ($1);
680 RECHAIN_STMTS ($1, COMPOUND_BODY ($1));
681 last_tree = saved_last_tree;
682 TREE_CHAIN (last_tree) = NULL_TREE;
683 if (!last_expr_type)
684 last_expr_type = void_type_node;
685 $$ = build1 (STMT_EXPR, last_expr_type, $1);
686 TREE_SIDE_EFFECTS ($$) = 1;
687 }
688 | compstmt_primary_start error ')'
689 {
690 pop_label_level ();
691 last_tree = COMPOUND_BODY ($1);
692 TREE_CHAIN (last_tree) = NULL_TREE;
693 $$ = error_mark_node;
694 }
695 | primary '(' exprlist ')' %prec '.'
696 { $$ = build_function_call ($1, $3); }
697 | VA_ARG '(' expr_no_commas ',' typename ')'
698 { $$ = build_va_arg ($3, groktypename ($5)); }
699 | primary '[' expr ']' %prec '.'
700 { $$ = build_array_ref ($1, $3); }
701 | primary '.' identifier
702 {
703 ifobjc
704 if (doing_objc_thang)
705 {
706 if (is_public ($1, $3))
707 $$ = build_component_ref ($1, $3);
708 else
709 $$ = error_mark_node;
710 }
711 else
712 end ifobjc
713 $$ = build_component_ref ($1, $3);
714 }
715 | primary POINTSAT identifier
716 {
717 tree expr = build_indirect_ref ($1, "->");
719 ifobjc
720 if (doing_objc_thang)
721 {
722 if (is_public (expr, $3))
723 $$ = build_component_ref (expr, $3);
724 else
725 $$ = error_mark_node;
726 }
727 else
728 end ifobjc
729 $$ = build_component_ref (expr, $3);
730 }
731 | primary PLUSPLUS
732 { $$ = build_unary_op (POSTINCREMENT_EXPR, $1, 0); }
733 | primary MINUSMINUS
734 { $$ = build_unary_op (POSTDECREMENT_EXPR, $1, 0); }
735 ifobjc
736 | objcmessageexpr
737 { $$ = build_message_expr ($1); }
738 | objcselectorexpr
739 { $$ = build_selector_expr ($1); }
740 | objcprotocolexpr
741 { $$ = build_protocol_expr ($1); }
742 | objcencodeexpr
743 { $$ = build_encode_expr ($1); }
744 | objc_string
745 { $$ = build_objc_string_object ($1); }
746 end ifobjc
747 ;
749 /* Produces a STRING_CST with perhaps more STRING_CSTs chained onto it. */
750 string:
751 STRING
752 | string STRING
753 {
754 ifc
755 static int last_lineno = 0;
756 static const char *last_input_filename = 0;
757 end ifc
758 $$ = chainon ($1, $2);
759 ifc
760 if (warn_traditional && !in_system_header
761 && (lineno != last_lineno || !last_input_filename ||
762 strcmp (last_input_filename, input_filename)))
763 {
764 warning ("traditional C rejects string concatenation");
765 last_lineno = lineno;
766 last_input_filename = input_filename;
767 }
768 end ifc
769 }
770 ;
772 ifobjc
773 /* Produces an STRING_CST with perhaps more STRING_CSTs chained
774 onto it, which is to be read as an ObjC string object. */
775 objc_string:
776 OBJC_STRING
777 | objc_string OBJC_STRING
778 { $$ = chainon ($1, $2); }
779 ;
780 end ifobjc
782 old_style_parm_decls:
783 /* empty */
784 | datadecls
785 | datadecls ELLIPSIS
786 /* ... is used here to indicate a varargs function. */
787 { c_mark_varargs ();
788 if (pedantic)
789 pedwarn ("ISO C does not permit use of `varargs.h'"); }
790 ;
792 /* The following are analogous to lineno_decl, decls and decl
793 except that they do not allow nested functions.
794 They are used for old-style parm decls. */
795 lineno_datadecl:
796 save_filename save_lineno datadecl
797 { }
798 ;
800 datadecls:
801 lineno_datadecl
802 | errstmt
803 | datadecls lineno_datadecl
804 | lineno_datadecl errstmt
805 ;
807 /* We don't allow prefix attributes here because they cause reduce/reduce
808 conflicts: we can't know whether we're parsing a function decl with
809 attribute suffix, or function defn with attribute prefix on first old
810 style parm. */
811 datadecl:
812 declspecs_ts_nosa setspecs initdecls ';'
813 { current_declspecs = TREE_VALUE (declspec_stack);
814 prefix_attributes = TREE_PURPOSE (declspec_stack);
815 declspec_stack = TREE_CHAIN (declspec_stack); }
816 | declspecs_nots_nosa setspecs notype_initdecls ';'
817 { current_declspecs = TREE_VALUE (declspec_stack);
818 prefix_attributes = TREE_PURPOSE (declspec_stack);
819 declspec_stack = TREE_CHAIN (declspec_stack); }
820 | declspecs_ts_nosa ';'
821 { shadow_tag_warned ($1, 1);
822 pedwarn ("empty declaration"); }
823 | declspecs_nots_nosa ';'
824 { pedwarn ("empty declaration"); }
825 ;
827 /* This combination which saves a lineno before a decl
828 is the normal thing to use, rather than decl itself.
829 This is to avoid shift/reduce conflicts in contexts
830 where statement labels are allowed. */
831 lineno_decl:
832 save_filename save_lineno decl
833 { }
834 ;
836 /* records the type and storage class specs to use for processing
837 the declarators that follow.
838 Maintains a stack of outer-level values of current_declspecs,
839 for the sake of parm declarations nested in function declarators. */
840 setspecs: /* empty */
841 { pending_xref_error ();
842 declspec_stack = tree_cons (prefix_attributes,
843 current_declspecs,
844 declspec_stack);
845 split_specs_attrs ($<ttype>0,
846 ¤t_declspecs, &prefix_attributes); }
847 ;
849 /* ??? Yuck. See maybe_setattrs. */
850 setattrs: /* empty */
851 { prefix_attributes = chainon (prefix_attributes, $<ttype>0); }
852 ;
854 maybe_setattrs:
855 /* ??? Yuck. setattrs is a quick hack. We can't use
856 prefix_attributes because $1 only applies to this
857 declarator. We assume setspecs has already been done.
858 setattrs also avoids 5 reduce/reduce conflicts (otherwise multiple
859 attributes could be recognized here or in `attributes').
860 Properly attributes ought to be able to apply to any level of
861 nested declarator, but the necessary compiler support isn't
862 present, so the attributes apply to a declaration (which may be
863 nested). */
864 maybe_attribute setattrs
865 ;
867 decl:
868 declspecs_ts setspecs initdecls ';'
869 { current_declspecs = TREE_VALUE (declspec_stack);
870 prefix_attributes = TREE_PURPOSE (declspec_stack);
871 declspec_stack = TREE_CHAIN (declspec_stack); }
872 | declspecs_nots setspecs notype_initdecls ';'
873 { current_declspecs = TREE_VALUE (declspec_stack);
874 prefix_attributes = TREE_PURPOSE (declspec_stack);
875 declspec_stack = TREE_CHAIN (declspec_stack); }
876 | declspecs_ts setspecs nested_function
877 { current_declspecs = TREE_VALUE (declspec_stack);
878 prefix_attributes = TREE_PURPOSE (declspec_stack);
879 declspec_stack = TREE_CHAIN (declspec_stack); }
880 | declspecs_nots setspecs notype_nested_function
881 { current_declspecs = TREE_VALUE (declspec_stack);
882 prefix_attributes = TREE_PURPOSE (declspec_stack);
883 declspec_stack = TREE_CHAIN (declspec_stack); }
884 | declspecs ';'
885 { shadow_tag ($1); }
886 | extension decl
887 { RESTORE_WARN_FLAGS ($1); }
888 ;
890 /* A list of declaration specifiers. These are:
892 - Storage class specifiers (SCSPEC), which for GCC currently include
893 function specifiers ("inline").
895 - Type specifiers (typespec_*).
897 - Type qualifiers (TYPE_QUAL).
899 - Attribute specifier lists (attributes).
901 These are stored as a TREE_LIST; the head of the list is the last
902 item in the specifier list. Each entry in the list has either a
903 TREE_PURPOSE that is an attribute specifier list, or a TREE_VALUE that
904 is a single other specifier or qualifier; and a TREE_CHAIN that is the
905 rest of the list. TREE_STATIC is set on the list if something other
906 than a storage class specifier or attribute has been seen; this is used
907 to warn for the obsolescent usage of storage class specifiers other than
908 at the start of the list. (Doing this properly would require function
909 specifiers to be handled separately from storage class specifiers.)
911 The various cases below are classified according to:
913 (a) Whether a storage class specifier is included or not; some
914 places in the grammar disallow storage class specifiers (_sc or _nosc).
916 (b) Whether a type specifier has been seen; after a type specifier,
917 a typedef name is an identifier to redeclare (_ts or _nots).
919 (c) Whether the list starts with an attribute; in certain places,
920 the grammar requires specifiers that don't start with an attribute
921 (_sa or _nosa).
923 (d) Whether the list ends with an attribute (or a specifier such that
924 any following attribute would have been parsed as part of that specifier);
925 this avoids shift-reduce conflicts in the parsing of attributes
926 (_ea or _noea).
928 TODO:
930 (i) Distinguish between function specifiers and storage class specifiers,
931 at least for the purpose of warnings about obsolescent usage.
933 (ii) Halve the number of productions here by eliminating the _sc/_nosc
934 distinction and instead checking where required that storage class
935 specifiers aren't present. */
937 /* Declspecs which contain at least one type specifier or typedef name.
938 (Just `const' or `volatile' is not enough.)
939 A typedef'd name following these is taken as a name to be declared.
940 Declspecs have a non-NULL TREE_VALUE, attributes do not. */
942 declspecs_nosc_nots_nosa_noea:
943 TYPE_QUAL
944 { $$ = tree_cons (NULL_TREE, $1, NULL_TREE);
945 TREE_STATIC ($$) = 1; }
946 | declspecs_nosc_nots_nosa_noea TYPE_QUAL
947 { $$ = tree_cons (NULL_TREE, $2, $1);
948 TREE_STATIC ($$) = 1; }
949 | declspecs_nosc_nots_nosa_ea TYPE_QUAL
950 { $$ = tree_cons (NULL_TREE, $2, $1);
951 TREE_STATIC ($$) = 1; }
952 ;
954 declspecs_nosc_nots_nosa_ea:
955 declspecs_nosc_nots_nosa_noea attributes
956 { $$ = tree_cons ($2, NULL_TREE, $1);
957 TREE_STATIC ($$) = TREE_STATIC ($1); }
958 ;
960 declspecs_nosc_nots_sa_noea:
961 declspecs_nosc_nots_sa_noea TYPE_QUAL
962 { $$ = tree_cons (NULL_TREE, $2, $1);
963 TREE_STATIC ($$) = 1; }
964 | declspecs_nosc_nots_sa_ea TYPE_QUAL
965 { $$ = tree_cons (NULL_TREE, $2, $1);
966 TREE_STATIC ($$) = 1; }
967 ;
969 declspecs_nosc_nots_sa_ea:
970 attributes
971 { $$ = tree_cons ($1, NULL_TREE, NULL_TREE);
972 TREE_STATIC ($$) = 0; }
973 | declspecs_nosc_nots_sa_noea attributes
974 { $$ = tree_cons ($2, NULL_TREE, $1);
975 TREE_STATIC ($$) = TREE_STATIC ($1); }
976 ;
978 declspecs_nosc_ts_nosa_noea:
979 typespec_nonattr
980 { $$ = tree_cons (NULL_TREE, $1, NULL_TREE);
981 TREE_STATIC ($$) = 1; }
982 | declspecs_nosc_ts_nosa_noea TYPE_QUAL
983 { $$ = tree_cons (NULL_TREE, $2, $1);
984 TREE_STATIC ($$) = 1; }
985 | declspecs_nosc_ts_nosa_ea TYPE_QUAL
986 { $$ = tree_cons (NULL_TREE, $2, $1);
987 TREE_STATIC ($$) = 1; }
988 | declspecs_nosc_ts_nosa_noea typespec_reserved_nonattr
989 { $$ = tree_cons (NULL_TREE, $2, $1);
990 TREE_STATIC ($$) = 1; }
991 | declspecs_nosc_ts_nosa_ea typespec_reserved_nonattr
992 { $$ = tree_cons (NULL_TREE, $2, $1);
993 TREE_STATIC ($$) = 1; }
994 | declspecs_nosc_nots_nosa_noea typespec_nonattr
995 { $$ = tree_cons (NULL_TREE, $2, $1);
996 TREE_STATIC ($$) = 1; }
997 | declspecs_nosc_nots_nosa_ea typespec_nonattr
998 { $$ = tree_cons (NULL_TREE, $2, $1);
999 TREE_STATIC ($$) = 1; }
1000 ;
1002 declspecs_nosc_ts_nosa_ea:
1003 typespec_attr
1004 { $$ = tree_cons (NULL_TREE, $1, NULL_TREE);
1005 TREE_STATIC ($$) = 1; }
1006 | declspecs_nosc_ts_nosa_noea attributes
1007 { $$ = tree_cons ($2, NULL_TREE, $1);
1008 TREE_STATIC ($$) = TREE_STATIC ($1); }
1009 | declspecs_nosc_ts_nosa_noea typespec_reserved_attr
1010 { $$ = tree_cons (NULL_TREE, $2, $1);
1011 TREE_STATIC ($$) = 1; }
1012 | declspecs_nosc_ts_nosa_ea typespec_reserved_attr
1013 { $$ = tree_cons (NULL_TREE, $2, $1);
1014 TREE_STATIC ($$) = 1; }
1015 | declspecs_nosc_nots_nosa_noea typespec_attr
1016 { $$ = tree_cons (NULL_TREE, $2, $1);
1017 TREE_STATIC ($$) = 1; }
1018 | declspecs_nosc_nots_nosa_ea typespec_attr
1019 { $$ = tree_cons (NULL_TREE, $2, $1);
1020 TREE_STATIC ($$) = 1; }
1021 ;
1023 declspecs_nosc_ts_sa_noea:
1024 declspecs_nosc_ts_sa_noea TYPE_QUAL
1025 { $$ = tree_cons (NULL_TREE, $2, $1);
1026 TREE_STATIC ($$) = 1; }
1027 | declspecs_nosc_ts_sa_ea TYPE_QUAL
1028 { $$ = tree_cons (NULL_TREE, $2, $1);
1029 TREE_STATIC ($$) = 1; }
1030 | declspecs_nosc_ts_sa_noea typespec_reserved_nonattr
1031 { $$ = tree_cons (NULL_TREE, $2, $1);
1032 TREE_STATIC ($$) = 1; }
1033 | declspecs_nosc_ts_sa_ea typespec_reserved_nonattr
1034 { $$ = tree_cons (NULL_TREE, $2, $1);
1035 TREE_STATIC ($$) = 1; }
1036 | declspecs_nosc_nots_sa_noea typespec_nonattr
1037 { $$ = tree_cons (NULL_TREE, $2, $1);
1038 TREE_STATIC ($$) = 1; }
1039 | declspecs_nosc_nots_sa_ea typespec_nonattr
1040 { $$ = tree_cons (NULL_TREE, $2, $1);
1041 TREE_STATIC ($$) = 1; }
1042 ;
1044 declspecs_nosc_ts_sa_ea:
1045 declspecs_nosc_ts_sa_noea attributes
1046 { $$ = tree_cons ($2, NULL_TREE, $1);
1047 TREE_STATIC ($$) = TREE_STATIC ($1); }
1048 | declspecs_nosc_ts_sa_noea typespec_reserved_attr
1049 { $$ = tree_cons (NULL_TREE, $2, $1);
1050 TREE_STATIC ($$) = 1; }
1051 | declspecs_nosc_ts_sa_ea typespec_reserved_attr
1052 { $$ = tree_cons (NULL_TREE, $2, $1);
1053 TREE_STATIC ($$) = 1; }
1054 | declspecs_nosc_nots_sa_noea typespec_attr
1055 { $$ = tree_cons (NULL_TREE, $2, $1);
1056 TREE_STATIC ($$) = 1; }
1057 | declspecs_nosc_nots_sa_ea typespec_attr
1058 { $$ = tree_cons (NULL_TREE, $2, $1);
1059 TREE_STATIC ($$) = 1; }
1060 ;
1062 declspecs_sc_nots_nosa_noea:
1063 SCSPEC
1064 { $$ = tree_cons (NULL_TREE, $1, NULL_TREE);
1065 TREE_STATIC ($$) = 0; }
1066 | declspecs_sc_nots_nosa_noea TYPE_QUAL
1067 { $$ = tree_cons (NULL_TREE, $2, $1);
1068 TREE_STATIC ($$) = 1; }
1069 | declspecs_sc_nots_nosa_ea TYPE_QUAL
1070 { $$ = tree_cons (NULL_TREE, $2, $1);
1071 TREE_STATIC ($$) = 1; }
1072 | declspecs_nosc_nots_nosa_noea 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_nosc_nots_nosa_ea 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_noea 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 | declspecs_sc_nots_nosa_ea SCSPEC
1091 { if (extra_warnings && TREE_STATIC ($1))
1092 warning ("`%s' is not at beginning of declaration",
1093 IDENTIFIER_POINTER ($2));
1094 $$ = tree_cons (NULL_TREE, $2, $1);
1095 TREE_STATIC ($$) = TREE_STATIC ($1); }
1096 ;
1098 declspecs_sc_nots_nosa_ea:
1099 declspecs_sc_nots_nosa_noea attributes
1100 { $$ = tree_cons ($2, NULL_TREE, $1);
1101 TREE_STATIC ($$) = TREE_STATIC ($1); }
1102 ;
1104 declspecs_sc_nots_sa_noea:
1105 declspecs_sc_nots_sa_noea TYPE_QUAL
1106 { $$ = tree_cons (NULL_TREE, $2, $1);
1107 TREE_STATIC ($$) = 1; }
1108 | declspecs_sc_nots_sa_ea TYPE_QUAL
1109 { $$ = tree_cons (NULL_TREE, $2, $1);
1110 TREE_STATIC ($$) = 1; }
1111 | declspecs_nosc_nots_sa_noea 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_nosc_nots_sa_ea 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_noea 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 | declspecs_sc_nots_sa_ea SCSPEC
1130 { if (extra_warnings && TREE_STATIC ($1))
1131 warning ("`%s' is not at beginning of declaration",
1132 IDENTIFIER_POINTER ($2));
1133 $$ = tree_cons (NULL_TREE, $2, $1);
1134 TREE_STATIC ($$) = TREE_STATIC ($1); }
1135 ;
1137 declspecs_sc_nots_sa_ea:
1138 declspecs_sc_nots_sa_noea attributes
1139 { $$ = tree_cons ($2, NULL_TREE, $1);
1140 TREE_STATIC ($$) = TREE_STATIC ($1); }
1141 ;
1143 declspecs_sc_ts_nosa_noea:
1144 declspecs_sc_ts_nosa_noea TYPE_QUAL
1145 { $$ = tree_cons (NULL_TREE, $2, $1);
1146 TREE_STATIC ($$) = 1; }
1147 | declspecs_sc_ts_nosa_ea TYPE_QUAL
1148 { $$ = tree_cons (NULL_TREE, $2, $1);
1149 TREE_STATIC ($$) = 1; }
1150 | declspecs_sc_ts_nosa_noea typespec_reserved_nonattr
1151 { $$ = tree_cons (NULL_TREE, $2, $1);
1152 TREE_STATIC ($$) = 1; }
1153 | declspecs_sc_ts_nosa_ea typespec_reserved_nonattr
1154 { $$ = tree_cons (NULL_TREE, $2, $1);
1155 TREE_STATIC ($$) = 1; }
1156 | declspecs_sc_nots_nosa_noea typespec_nonattr
1157 { $$ = tree_cons (NULL_TREE, $2, $1);
1158 TREE_STATIC ($$) = 1; }
1159 | declspecs_sc_nots_nosa_ea typespec_nonattr
1160 { $$ = tree_cons (NULL_TREE, $2, $1);
1161 TREE_STATIC ($$) = 1; }
1162 | declspecs_nosc_ts_nosa_noea 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_nosc_ts_nosa_ea 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_noea 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 | declspecs_sc_ts_nosa_ea SCSPEC
1181 { if (extra_warnings && TREE_STATIC ($1))
1182 warning ("`%s' is not at beginning of declaration",
1183 IDENTIFIER_POINTER ($2));
1184 $$ = tree_cons (NULL_TREE, $2, $1);
1185 TREE_STATIC ($$) = TREE_STATIC ($1); }
1186 ;
1188 declspecs_sc_ts_nosa_ea:
1189 declspecs_sc_ts_nosa_noea attributes
1190 { $$ = tree_cons ($2, NULL_TREE, $1);
1191 TREE_STATIC ($$) = TREE_STATIC ($1); }
1192 | declspecs_sc_ts_nosa_noea typespec_reserved_attr
1193 { $$ = tree_cons (NULL_TREE, $2, $1);
1194 TREE_STATIC ($$) = 1; }
1195 | declspecs_sc_ts_nosa_ea typespec_reserved_attr
1196 { $$ = tree_cons (NULL_TREE, $2, $1);
1197 TREE_STATIC ($$) = 1; }
1198 | declspecs_sc_nots_nosa_noea typespec_attr
1199 { $$ = tree_cons (NULL_TREE, $2, $1);
1200 TREE_STATIC ($$) = 1; }
1201 | declspecs_sc_nots_nosa_ea typespec_attr
1202 { $$ = tree_cons (NULL_TREE, $2, $1);
1203 TREE_STATIC ($$) = 1; }
1204 ;
1206 declspecs_sc_ts_sa_noea:
1207 declspecs_sc_ts_sa_noea TYPE_QUAL
1208 { $$ = tree_cons (NULL_TREE, $2, $1);
1209 TREE_STATIC ($$) = 1; }
1210 | declspecs_sc_ts_sa_ea TYPE_QUAL
1211 { $$ = tree_cons (NULL_TREE, $2, $1);
1212 TREE_STATIC ($$) = 1; }
1213 | declspecs_sc_ts_sa_noea typespec_reserved_nonattr
1214 { $$ = tree_cons (NULL_TREE, $2, $1);
1215 TREE_STATIC ($$) = 1; }
1216 | declspecs_sc_ts_sa_ea typespec_reserved_nonattr
1217 { $$ = tree_cons (NULL_TREE, $2, $1);
1218 TREE_STATIC ($$) = 1; }
1219 | declspecs_sc_nots_sa_noea typespec_nonattr
1220 { $$ = tree_cons (NULL_TREE, $2, $1);
1221 TREE_STATIC ($$) = 1; }
1222 | declspecs_sc_nots_sa_ea typespec_nonattr
1223 { $$ = tree_cons (NULL_TREE, $2, $1);
1224 TREE_STATIC ($$) = 1; }
1225 | declspecs_nosc_ts_sa_noea 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_nosc_ts_sa_ea 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_noea 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 | declspecs_sc_ts_sa_ea SCSPEC
1244 { if (extra_warnings && TREE_STATIC ($1))
1245 warning ("`%s' is not at beginning of declaration",
1246 IDENTIFIER_POINTER ($2));
1247 $$ = tree_cons (NULL_TREE, $2, $1);
1248 TREE_STATIC ($$) = TREE_STATIC ($1); }
1249 ;
1251 declspecs_sc_ts_sa_ea:
1252 declspecs_sc_ts_sa_noea attributes
1253 { $$ = tree_cons ($2, NULL_TREE, $1);
1254 TREE_STATIC ($$) = TREE_STATIC ($1); }
1255 | declspecs_sc_ts_sa_noea typespec_reserved_attr
1256 { $$ = tree_cons (NULL_TREE, $2, $1);
1257 TREE_STATIC ($$) = 1; }
1258 | declspecs_sc_ts_sa_ea typespec_reserved_attr
1259 { $$ = tree_cons (NULL_TREE, $2, $1);
1260 TREE_STATIC ($$) = 1; }
1261 | declspecs_sc_nots_sa_noea typespec_attr
1262 { $$ = tree_cons (NULL_TREE, $2, $1);
1263 TREE_STATIC ($$) = 1; }
1264 | declspecs_sc_nots_sa_ea typespec_attr
1265 { $$ = tree_cons (NULL_TREE, $2, $1);
1266 TREE_STATIC ($$) = 1; }
1267 ;
1269 /* Particular useful classes of declspecs. */
1270 declspecs_ts:
1271 declspecs_nosc_ts_nosa_noea
1272 | declspecs_nosc_ts_nosa_ea
1273 | declspecs_nosc_ts_sa_noea
1274 | declspecs_nosc_ts_sa_ea
1275 | declspecs_sc_ts_nosa_noea
1276 | declspecs_sc_ts_nosa_ea
1277 | declspecs_sc_ts_sa_noea
1278 | declspecs_sc_ts_sa_ea
1279 ;
1281 declspecs_nots:
1282 declspecs_nosc_nots_nosa_noea
1283 | declspecs_nosc_nots_nosa_ea
1284 | declspecs_nosc_nots_sa_noea
1285 | declspecs_nosc_nots_sa_ea
1286 | declspecs_sc_nots_nosa_noea
1287 | declspecs_sc_nots_nosa_ea
1288 | declspecs_sc_nots_sa_noea
1289 | declspecs_sc_nots_sa_ea
1290 ;
1292 declspecs_ts_nosa:
1293 declspecs_nosc_ts_nosa_noea
1294 | declspecs_nosc_ts_nosa_ea
1295 | declspecs_sc_ts_nosa_noea
1296 | declspecs_sc_ts_nosa_ea
1297 ;
1299 declspecs_nots_nosa:
1300 declspecs_nosc_nots_nosa_noea
1301 | declspecs_nosc_nots_nosa_ea
1302 | declspecs_sc_nots_nosa_noea
1303 | declspecs_sc_nots_nosa_ea
1304 ;
1306 declspecs_nosc_ts:
1307 declspecs_nosc_ts_nosa_noea
1308 | declspecs_nosc_ts_nosa_ea
1309 | declspecs_nosc_ts_sa_noea
1310 | declspecs_nosc_ts_sa_ea
1311 ;
1313 declspecs_nosc_nots:
1314 declspecs_nosc_nots_nosa_noea
1315 | declspecs_nosc_nots_nosa_ea
1316 | declspecs_nosc_nots_sa_noea
1317 | declspecs_nosc_nots_sa_ea
1318 ;
1320 declspecs_nosc:
1321 declspecs_nosc_ts_nosa_noea
1322 | declspecs_nosc_ts_nosa_ea
1323 | declspecs_nosc_ts_sa_noea
1324 | declspecs_nosc_ts_sa_ea
1325 | declspecs_nosc_nots_nosa_noea
1326 | declspecs_nosc_nots_nosa_ea
1327 | declspecs_nosc_nots_sa_noea
1328 | declspecs_nosc_nots_sa_ea
1329 ;
1331 declspecs:
1332 declspecs_nosc_nots_nosa_noea
1333 | declspecs_nosc_nots_nosa_ea
1334 | declspecs_nosc_nots_sa_noea
1335 | declspecs_nosc_nots_sa_ea
1336 | declspecs_nosc_ts_nosa_noea
1337 | declspecs_nosc_ts_nosa_ea
1338 | declspecs_nosc_ts_sa_noea
1339 | declspecs_nosc_ts_sa_ea
1340 | declspecs_sc_nots_nosa_noea
1341 | declspecs_sc_nots_nosa_ea
1342 | declspecs_sc_nots_sa_noea
1343 | declspecs_sc_nots_sa_ea
1344 | declspecs_sc_ts_nosa_noea
1345 | declspecs_sc_ts_nosa_ea
1346 | declspecs_sc_ts_sa_noea
1347 | declspecs_sc_ts_sa_ea
1348 ;
1350 /* A (possibly empty) sequence of type qualifiers and attributes, to be
1351 followed by the effect of setattrs if any attributes were present. */
1352 maybe_type_quals_setattrs:
1353 /* empty */
1354 { $$ = NULL_TREE; }
1355 | declspecs_nosc_nots
1356 { tree specs, attrs;
1357 split_specs_attrs ($1, &specs, &attrs);
1358 /* ??? Yuck. See maybe_setattrs. */
1359 if (attrs != NULL_TREE)
1360 prefix_attributes = chainon (prefix_attributes, attrs);
1361 $$ = specs; }
1362 ;
1364 /* A type specifier (but not a type qualifier).
1365 Once we have seen one of these in a declaration,
1366 if a typedef name appears then it is being redeclared.
1368 The _reserved versions start with a reserved word and may appear anywhere
1369 in the declaration specifiers; the _nonreserved versions may only
1370 appear before any other type specifiers, and after that are (if names)
1371 being redeclared.
1373 FIXME: should the _nonreserved version be restricted to names being
1374 redeclared only? The other entries there relate only the GNU extensions
1375 and Objective C, and are historically parsed thus, and don't make sense
1376 after other type specifiers, but it might be cleaner to count them as
1377 _reserved.
1379 _attr means: specifiers that either end with attributes,
1380 or are such that any following attributes would
1381 be parsed as part of the specifier.
1383 _nonattr: specifiers. */
1385 typespec_nonattr:
1386 typespec_reserved_nonattr
1387 | typespec_nonreserved_nonattr
1388 ;
1390 typespec_attr:
1391 typespec_reserved_attr
1392 ;
1394 typespec_reserved_nonattr:
1395 TYPESPEC
1396 | structsp_nonattr
1397 ;
1399 typespec_reserved_attr:
1400 structsp_attr
1401 ;
1403 typespec_nonreserved_nonattr:
1404 TYPENAME
1405 { /* For a typedef name, record the meaning, not the name.
1406 In case of `foo foo, bar;'. */
1407 $$ = lookup_name ($1); }
1408 ifobjc
1409 | CLASSNAME protocolrefs
1410 { $$ = get_static_reference ($1, $2); }
1411 | OBJECTNAME protocolrefs
1412 { $$ = get_object_reference ($2); }
1414 /* Make "<SomeProtocol>" equivalent to "id <SomeProtocol>"
1415 - nisse@lysator.liu.se */
1416 | non_empty_protocolrefs
1417 { $$ = get_object_reference ($1); }
1418 end ifobjc
1419 | TYPEOF '(' expr ')'
1420 { $$ = TREE_TYPE ($3); }
1421 | TYPEOF '(' typename ')'
1422 { $$ = groktypename ($3); }
1423 ;
1425 /* typespec_nonreserved_attr does not exist. */
1427 initdecls:
1428 initdcl
1429 | initdecls ',' maybe_setattrs initdcl
1430 ;
1432 notype_initdecls:
1433 notype_initdcl
1434 | notype_initdecls ',' maybe_setattrs notype_initdcl
1435 ;
1437 maybeasm:
1438 /* empty */
1439 { $$ = NULL_TREE; }
1440 | ASM_KEYWORD '(' string ')'
1441 { if (TREE_CHAIN ($3)) $3 = combine_strings ($3);
1442 $$ = $3;
1443 }
1444 ;
1446 initdcl:
1447 declarator maybeasm maybe_attribute '='
1448 { $<ttype>$ = start_decl ($1, current_declspecs, 1,
1449 $3, prefix_attributes);
1450 start_init ($<ttype>$, $2, global_bindings_p ()); }
1451 init
1452 /* Note how the declaration of the variable is in effect while its init is parsed! */
1453 { finish_init ();
1454 finish_decl ($<ttype>5, $6, $2); }
1455 | declarator maybeasm maybe_attribute
1456 { tree d = start_decl ($1, current_declspecs, 0,
1457 $3, prefix_attributes);
1458 finish_decl (d, NULL_TREE, $2);
1459 }
1460 ;
1462 notype_initdcl:
1463 notype_declarator maybeasm maybe_attribute '='
1464 { $<ttype>$ = start_decl ($1, current_declspecs, 1,
1465 $3, prefix_attributes);
1466 start_init ($<ttype>$, $2, global_bindings_p ()); }
1467 init
1468 /* Note how the declaration of the variable is in effect while its init is parsed! */
1469 { finish_init ();
1470 decl_attributes ($<ttype>5, $3, prefix_attributes);
1471 finish_decl ($<ttype>5, $6, $2); }
1472 | notype_declarator maybeasm maybe_attribute
1473 { tree d = start_decl ($1, current_declspecs, 0,
1474 $3, prefix_attributes);
1475 finish_decl (d, NULL_TREE, $2); }
1476 ;
1477 /* the * rules are dummies to accept the Apollo extended syntax
1478 so that the header files compile. */
1479 maybe_attribute:
1480 /* empty */
1481 { $$ = NULL_TREE; }
1482 | attributes
1483 { $$ = $1; }
1484 ;
1486 attributes:
1487 attribute
1488 { $$ = $1; }
1489 | attributes attribute
1490 { $$ = chainon ($1, $2); }
1491 ;
1493 attribute:
1494 ATTRIBUTE '(' '(' attribute_list ')' ')'
1495 { $$ = $4; }
1496 ;
1498 attribute_list:
1499 attrib
1500 { $$ = $1; }
1501 | attribute_list ',' attrib
1502 { $$ = chainon ($1, $3); }
1503 ;
1505 attrib:
1506 /* empty */
1507 { $$ = NULL_TREE; }
1508 | any_word
1509 { $$ = build_tree_list ($1, NULL_TREE); }
1510 | any_word '(' IDENTIFIER ')'
1511 { $$ = build_tree_list ($1, build_tree_list (NULL_TREE, $3)); }
1512 | any_word '(' IDENTIFIER ',' nonnull_exprlist ')'
1513 { $$ = build_tree_list ($1, tree_cons (NULL_TREE, $3, $5)); }
1514 | any_word '(' exprlist ')'
1515 { $$ = build_tree_list ($1, $3); }
1516 ;
1518 /* This still leaves out most reserved keywords,
1519 shouldn't we include them? */
1521 any_word:
1522 identifier
1523 | SCSPEC
1524 | TYPESPEC
1525 | TYPE_QUAL
1526 ;
1527 \f
1528 /* Initializers. `init' is the entry point. */
1530 init:
1531 expr_no_commas
1532 | '{'
1533 { really_start_incremental_init (NULL_TREE); }
1534 initlist_maybe_comma '}'
1535 { $$ = pop_init_level (0); }
1536 | error
1537 { $$ = error_mark_node; }
1538 ;
1540 /* `initlist_maybe_comma' is the guts of an initializer in braces. */
1541 initlist_maybe_comma:
1542 /* empty */
1543 { if (pedantic)
1544 pedwarn ("ISO C forbids empty initializer braces"); }
1545 | initlist1 maybecomma
1546 ;
1548 initlist1:
1549 initelt
1550 | initlist1 ',' initelt
1551 ;
1553 /* `initelt' is a single element of an initializer.
1554 It may use braces. */
1555 initelt:
1556 designator_list '=' initval
1557 { if (pedantic && ! flag_isoc99)
1558 pedwarn ("ISO C89 forbids specifying subobject to initialize"); }
1559 | designator initval
1560 { if (pedantic)
1561 pedwarn ("obsolete use of designated initializer without `='"); }
1562 | identifier ':'
1563 { set_init_label ($1);
1564 if (pedantic)
1565 pedwarn ("obsolete use of designated initializer with `:'"); }
1566 initval
1567 | initval
1568 ;
1570 initval:
1571 '{'
1572 { push_init_level (0); }
1573 initlist_maybe_comma '}'
1574 { process_init_element (pop_init_level (0)); }
1575 | expr_no_commas
1576 { process_init_element ($1); }
1577 | error
1578 ;
1580 designator_list:
1581 designator
1582 | designator_list designator
1583 ;
1585 designator:
1586 '.' identifier
1587 { set_init_label ($2); }
1588 /* These are for labeled elements. The syntax for an array element
1589 initializer conflicts with the syntax for an Objective-C message,
1590 so don't include these productions in the Objective-C grammar. */
1591 ifc
1592 | '[' expr_no_commas ELLIPSIS expr_no_commas ']'
1593 { set_init_index ($2, $4);
1594 if (pedantic)
1595 pedwarn ("ISO C forbids specifying range of elements to initialize"); }
1596 | '[' expr_no_commas ']'
1597 { set_init_index ($2, NULL_TREE); }
1598 end ifc
1599 ;
1600 \f
1601 nested_function:
1602 declarator
1603 { if (pedantic)
1604 pedwarn ("ISO C forbids nested functions");
1606 push_function_context ();
1607 if (! start_function (current_declspecs, $1,
1608 prefix_attributes, NULL_TREE))
1609 {
1610 pop_function_context ();
1611 YYERROR1;
1612 }
1613 }
1614 old_style_parm_decls
1615 { store_parm_decls (); }
1616 /* This used to use compstmt_or_error.
1617 That caused a bug with input `f(g) int g {}',
1618 where the use of YYERROR1 above caused an error
1619 which then was handled by compstmt_or_error.
1620 There followed a repeated execution of that same rule,
1621 which called YYERROR1 again, and so on. */
1622 save_filename save_lineno compstmt
1623 { tree decl = current_function_decl;
1624 DECL_SOURCE_FILE (decl) = $5;
1625 DECL_SOURCE_LINE (decl) = $6;
1626 finish_function (1);
1627 pop_function_context ();
1628 add_decl_stmt (decl); }
1629 ;
1631 notype_nested_function:
1632 notype_declarator
1633 { if (pedantic)
1634 pedwarn ("ISO C forbids nested functions");
1636 push_function_context ();
1637 if (! start_function (current_declspecs, $1,
1638 prefix_attributes, NULL_TREE))
1639 {
1640 pop_function_context ();
1641 YYERROR1;
1642 }
1643 }
1644 old_style_parm_decls
1645 { store_parm_decls (); }
1646 /* This used to use compstmt_or_error.
1647 That caused a bug with input `f(g) int g {}',
1648 where the use of YYERROR1 above caused an error
1649 which then was handled by compstmt_or_error.
1650 There followed a repeated execution of that same rule,
1651 which called YYERROR1 again, and so on. */
1652 save_filename save_lineno compstmt
1653 { tree decl = current_function_decl;
1654 DECL_SOURCE_FILE (decl) = $5;
1655 DECL_SOURCE_LINE (decl) = $6;
1656 finish_function (1);
1657 pop_function_context ();
1658 add_decl_stmt (decl); }
1659 ;
1661 /* Any kind of declarator (thus, all declarators allowed
1662 after an explicit typespec). */
1664 declarator:
1665 after_type_declarator
1666 | notype_declarator
1667 ;
1669 /* A declarator that is allowed only after an explicit typespec. */
1671 after_type_declarator:
1672 '(' maybe_setattrs after_type_declarator ')'
1673 { $$ = $3; }
1674 | after_type_declarator '(' parmlist_or_identifiers %prec '.'
1675 { $$ = build_nt (CALL_EXPR, $1, $3, NULL_TREE); }
1676 /* | after_type_declarator '(' error ')' %prec '.'
1677 { $$ = build_nt (CALL_EXPR, $1, NULL_TREE, NULL_TREE);
1678 poplevel (0, 0, 0); } */
1679 | after_type_declarator '[' expr ']' %prec '.'
1680 { $$ = build_nt (ARRAY_REF, $1, $3); }
1681 | after_type_declarator '[' ']' %prec '.'
1682 { $$ = build_nt (ARRAY_REF, $1, NULL_TREE); }
1683 | '*' maybe_type_quals_setattrs after_type_declarator %prec UNARY
1684 { $$ = make_pointer_declarator ($2, $3); }
1685 | TYPENAME
1686 ifobjc
1687 | OBJECTNAME
1688 end ifobjc
1689 ;
1691 /* Kinds of declarator that can appear in a parameter list
1692 in addition to notype_declarator. This is like after_type_declarator
1693 but does not allow a typedef name in parentheses as an identifier
1694 (because it would conflict with a function with that typedef as arg). */
1696 parm_declarator:
1697 parm_declarator '(' parmlist_or_identifiers %prec '.'
1698 { $$ = build_nt (CALL_EXPR, $1, $3, NULL_TREE); }
1699 /* | parm_declarator '(' error ')' %prec '.'
1700 { $$ = build_nt (CALL_EXPR, $1, NULL_TREE, NULL_TREE);
1701 poplevel (0, 0, 0); } */
1702 ifc
1703 | parm_declarator '[' '*' ']' %prec '.'
1704 { $$ = build_nt (ARRAY_REF, $1, NULL_TREE);
1705 if (! flag_isoc99)
1706 error ("`[*]' in parameter declaration only allowed in ISO C 99");
1707 }
1708 end ifc
1709 | parm_declarator '[' expr ']' %prec '.'
1710 { $$ = build_nt (ARRAY_REF, $1, $3); }
1711 | parm_declarator '[' ']' %prec '.'
1712 { $$ = build_nt (ARRAY_REF, $1, NULL_TREE); }
1713 | '*' maybe_type_quals_setattrs parm_declarator %prec UNARY
1714 { $$ = make_pointer_declarator ($2, $3); }
1715 | TYPENAME
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 ifc
1732 | notype_declarator '[' '*' ']' %prec '.'
1733 { $$ = build_nt (ARRAY_REF, $1, NULL_TREE);
1734 if (! flag_isoc99)
1735 error ("`[*]' in parameter declaration only allowed in ISO C 99");
1736 }
1737 end ifc
1738 | notype_declarator '[' expr ']' %prec '.'
1739 { $$ = build_nt (ARRAY_REF, $1, $3); }
1740 | notype_declarator '[' ']' %prec '.'
1741 { $$ = build_nt (ARRAY_REF, $1, NULL_TREE); }
1742 | IDENTIFIER
1743 ;
1745 struct_head:
1746 STRUCT
1747 { $$ = NULL_TREE; }
1748 | STRUCT attributes
1749 { $$ = $2; }
1750 ;
1752 union_head:
1753 UNION
1754 { $$ = NULL_TREE; }
1755 | UNION attributes
1756 { $$ = $2; }
1757 ;
1759 enum_head:
1760 ENUM
1761 { $$ = NULL_TREE; }
1762 | ENUM attributes
1763 { $$ = $2; }
1764 ;
1766 /* structsp_attr: struct/union/enum specifiers that either
1767 end with attributes, or are such that any following attributes would
1768 be parsed as part of the struct/union/enum specifier.
1770 structsp_nonattr: other struct/union/enum specifiers. */
1772 structsp_attr:
1773 struct_head identifier '{'
1774 { $$ = start_struct (RECORD_TYPE, $2);
1775 /* Start scope of tag before parsing components. */
1776 }
1777 component_decl_list '}' maybe_attribute
1778 { $$ = finish_struct ($<ttype>4, $5, chainon ($1, $7)); }
1779 | struct_head '{' component_decl_list '}' maybe_attribute
1780 { $$ = finish_struct (start_struct (RECORD_TYPE, NULL_TREE),
1781 $3, chainon ($1, $5));
1782 }
1783 | union_head identifier '{'
1784 { $$ = start_struct (UNION_TYPE, $2); }
1785 component_decl_list '}' maybe_attribute
1786 { $$ = finish_struct ($<ttype>4, $5, chainon ($1, $7)); }
1787 | union_head '{' component_decl_list '}' maybe_attribute
1788 { $$ = finish_struct (start_struct (UNION_TYPE, NULL_TREE),
1789 $3, chainon ($1, $5));
1790 }
1791 | enum_head identifier '{'
1792 { $$ = start_enum ($2); }
1793 enumlist maybecomma_warn '}' maybe_attribute
1794 { $$ = finish_enum ($<ttype>4, nreverse ($5),
1795 chainon ($1, $8)); }
1796 | enum_head '{'
1797 { $$ = start_enum (NULL_TREE); }
1798 enumlist maybecomma_warn '}' maybe_attribute
1799 { $$ = finish_enum ($<ttype>3, nreverse ($4),
1800 chainon ($1, $7)); }
1801 ;
1803 structsp_nonattr:
1804 struct_head identifier
1805 { $$ = xref_tag (RECORD_TYPE, $2); }
1806 | union_head identifier
1807 { $$ = xref_tag (UNION_TYPE, $2); }
1808 | enum_head identifier
1809 { $$ = xref_tag (ENUMERAL_TYPE, $2);
1810 /* In ISO C, enumerated types can be referred to
1811 only if already defined. */
1812 if (pedantic && !COMPLETE_TYPE_P ($$))
1813 pedwarn ("ISO C forbids forward references to `enum' types"); }
1814 ;
1816 maybecomma:
1817 /* empty */
1818 | ','
1819 ;
1821 maybecomma_warn:
1822 /* empty */
1823 | ','
1824 { if (pedantic && ! flag_isoc99)
1825 pedwarn ("comma at end of enumerator list"); }
1826 ;
1828 component_decl_list:
1829 component_decl_list2
1830 { $$ = $1; }
1831 | component_decl_list2 component_decl
1832 { $$ = chainon ($1, $2);
1833 pedwarn ("no semicolon at end of struct or union"); }
1834 ;
1836 component_decl_list2: /* empty */
1837 { $$ = NULL_TREE; }
1838 | component_decl_list2 component_decl ';'
1839 { $$ = chainon ($1, $2); }
1840 | component_decl_list2 ';'
1841 { if (pedantic)
1842 pedwarn ("extra semicolon in struct or union specified"); }
1843 ifobjc
1844 /* foo(sizeof(struct{ @defs(ClassName)})); */
1845 | DEFS '(' CLASSNAME ')'
1846 {
1847 tree interface = lookup_interface ($3);
1849 if (interface)
1850 $$ = get_class_ivars (interface);
1851 else
1852 {
1853 error ("Cannot find interface declaration for `%s'",
1854 IDENTIFIER_POINTER ($3));
1855 $$ = NULL_TREE;
1856 }
1857 }
1858 end ifobjc
1859 ;
1861 component_decl:
1862 declspecs_nosc_ts setspecs components
1863 { $$ = $3;
1864 current_declspecs = TREE_VALUE (declspec_stack);
1865 prefix_attributes = TREE_PURPOSE (declspec_stack);
1866 declspec_stack = TREE_CHAIN (declspec_stack); }
1867 | declspecs_nosc_ts setspecs save_filename save_lineno
1868 {
1869 /* Support for unnamed structs or unions as members of
1870 structs or unions (which is [a] useful and [b] supports
1871 MS P-SDK). */
1872 if (pedantic)
1873 pedwarn ("ISO C doesn't support unnamed structs/unions");
1875 $$ = grokfield($3, $4, NULL, current_declspecs, NULL_TREE);
1876 current_declspecs = TREE_VALUE (declspec_stack);
1877 prefix_attributes = TREE_PURPOSE (declspec_stack);
1878 declspec_stack = TREE_CHAIN (declspec_stack);
1879 }
1880 | declspecs_nosc_nots setspecs components_notype
1881 { $$ = $3;
1882 current_declspecs = TREE_VALUE (declspec_stack);
1883 prefix_attributes = TREE_PURPOSE (declspec_stack);
1884 declspec_stack = TREE_CHAIN (declspec_stack); }
1885 | declspecs_nosc_nots
1886 { if (pedantic)
1887 pedwarn ("ISO C forbids member declarations with no members");
1888 shadow_tag($1);
1889 $$ = NULL_TREE; }
1890 | error
1891 { $$ = NULL_TREE; }
1892 | extension component_decl
1893 { $$ = $2;
1894 RESTORE_WARN_FLAGS ($1); }
1895 ;
1897 components:
1898 component_declarator
1899 | components ',' maybe_setattrs component_declarator
1900 { $$ = chainon ($1, $4); }
1901 ;
1903 components_notype:
1904 component_notype_declarator
1905 | components_notype ',' maybe_setattrs component_notype_declarator
1906 { $$ = chainon ($1, $4); }
1907 ;
1909 component_declarator:
1910 save_filename save_lineno declarator maybe_attribute
1911 { $$ = grokfield ($1, $2, $3, current_declspecs, NULL_TREE);
1912 decl_attributes ($$, $4, prefix_attributes); }
1913 | save_filename save_lineno
1914 declarator ':' expr_no_commas maybe_attribute
1915 { $$ = grokfield ($1, $2, $3, current_declspecs, $5);
1916 decl_attributes ($$, $6, prefix_attributes); }
1917 | save_filename save_lineno ':' expr_no_commas maybe_attribute
1918 { $$ = grokfield ($1, $2, NULL_TREE, current_declspecs, $4);
1919 decl_attributes ($$, $5, prefix_attributes); }
1920 ;
1922 component_notype_declarator:
1923 save_filename save_lineno notype_declarator maybe_attribute
1924 { $$ = grokfield ($1, $2, $3, current_declspecs, NULL_TREE);
1925 decl_attributes ($$, $4, prefix_attributes); }
1926 | save_filename save_lineno
1927 notype_declarator ':' expr_no_commas maybe_attribute
1928 { $$ = grokfield ($1, $2, $3, current_declspecs, $5);
1929 decl_attributes ($$, $6, prefix_attributes); }
1930 | save_filename save_lineno ':' expr_no_commas maybe_attribute
1931 { $$ = grokfield ($1, $2, NULL_TREE, current_declspecs, $4);
1932 decl_attributes ($$, $5, prefix_attributes); }
1933 ;
1935 /* We chain the enumerators in reverse order.
1936 They are put in forward order where enumlist is used.
1937 (The order used to be significant, but no longer is so.
1938 However, we still maintain the order, just to be clean.) */
1940 enumlist:
1941 enumerator
1942 | enumlist ',' enumerator
1943 { if ($1 == error_mark_node)
1944 $$ = $1;
1945 else
1946 $$ = chainon ($3, $1); }
1947 | error
1948 { $$ = error_mark_node; }
1949 ;
1952 enumerator:
1953 identifier
1954 { $$ = build_enumerator ($1, NULL_TREE); }
1955 | identifier '=' expr_no_commas
1956 { $$ = build_enumerator ($1, $3); }
1957 ;
1959 typename:
1960 declspecs_nosc
1961 { tree specs, attrs;
1962 pending_xref_error ();
1963 split_specs_attrs ($1, &specs, &attrs);
1964 /* We don't yet support attributes here. */
1965 if (attrs != NULL_TREE)
1966 warning ("attributes on type name ignored");
1967 $<ttype>$ = specs; }
1968 absdcl
1969 { $$ = build_tree_list ($<ttype>2, $3); }
1970 ;
1972 absdcl: /* an absolute declarator */
1973 /* empty */
1974 { $$ = NULL_TREE; }
1975 | absdcl1
1976 ;
1978 absdcl_maybe_attribute: /* absdcl maybe_attribute, but not just attributes */
1979 /* empty */
1980 { $$ = build_tree_list (build_tree_list (current_declspecs,
1981 NULL_TREE),
1982 build_tree_list (prefix_attributes,
1983 NULL_TREE)); }
1984 | absdcl1
1985 { $$ = build_tree_list (build_tree_list (current_declspecs,
1986 $1),
1987 build_tree_list (prefix_attributes,
1988 NULL_TREE)); }
1989 | absdcl1_noea attributes
1990 { $$ = build_tree_list (build_tree_list (current_declspecs,
1991 $1),
1992 build_tree_list (prefix_attributes,
1993 $2)); }
1994 ;
1996 absdcl1: /* a nonempty absolute declarator */
1997 absdcl1_ea
1998 | absdcl1_noea
1999 ;
2001 absdcl1_noea:
2002 direct_absdcl1
2003 | '*' maybe_type_quals_setattrs absdcl1_noea
2004 { $$ = make_pointer_declarator ($2, $3); }
2005 ;
2007 absdcl1_ea:
2008 '*' maybe_type_quals_setattrs
2009 { $$ = make_pointer_declarator ($2, NULL_TREE); }
2010 | '*' maybe_type_quals_setattrs absdcl1_ea
2011 { $$ = make_pointer_declarator ($2, $3); }
2012 ;
2014 direct_absdcl1:
2015 '(' maybe_setattrs absdcl1 ')'
2016 { $$ = $3; }
2017 | direct_absdcl1 '(' parmlist
2018 { $$ = build_nt (CALL_EXPR, $1, $3, NULL_TREE); }
2019 | direct_absdcl1 '[' expr ']'
2020 { $$ = build_nt (ARRAY_REF, $1, $3); }
2021 | direct_absdcl1 '[' ']'
2022 { $$ = build_nt (ARRAY_REF, $1, NULL_TREE); }
2023 | '(' parmlist
2024 { $$ = build_nt (CALL_EXPR, NULL_TREE, $2, NULL_TREE); }
2025 | '[' expr ']'
2026 { $$ = build_nt (ARRAY_REF, NULL_TREE, $2); }
2027 | '[' ']'
2028 { $$ = build_nt (ARRAY_REF, NULL_TREE, NULL_TREE); }
2030 /* A nonempty series of declarations and statements (possibly followed by
2031 some labels) that can form the body of a compound statement.
2032 NOTE: we don't allow labels on declarations; this might seem like a
2033 natural extension, but there would be a conflict between attributes
2034 on the label and prefix attributes on the declaration. */
2036 stmts_and_decls:
2037 lineno_stmt_decl_or_labels_ending_stmt
2038 | lineno_stmt_decl_or_labels_ending_decl
2039 | lineno_stmt_decl_or_labels_ending_label
2040 {
2041 pedwarn ("deprecated use of label at end of compound statement");
2042 }
2043 | lineno_stmt_decl_or_labels_ending_error
2044 ;
2046 lineno_stmt_decl_or_labels_ending_stmt:
2047 lineno_stmt
2048 | lineno_stmt_decl_or_labels_ending_stmt lineno_stmt
2049 | lineno_stmt_decl_or_labels_ending_decl lineno_stmt
2050 | lineno_stmt_decl_or_labels_ending_label lineno_stmt
2051 | lineno_stmt_decl_or_labels_ending_error lineno_stmt
2052 ;
2054 lineno_stmt_decl_or_labels_ending_decl:
2055 lineno_decl
2056 | lineno_stmt_decl_or_labels_ending_stmt lineno_decl
2057 { if (pedantic && !flag_isoc99)
2058 pedwarn ("ISO C89 forbids mixed declarations and code"); }
2059 | lineno_stmt_decl_or_labels_ending_decl lineno_decl
2060 | lineno_stmt_decl_or_labels_ending_error lineno_decl
2061 ;
2063 lineno_stmt_decl_or_labels_ending_label:
2064 lineno_label
2065 | lineno_stmt_decl_or_labels_ending_stmt lineno_label
2066 | lineno_stmt_decl_or_labels_ending_decl lineno_label
2067 | lineno_stmt_decl_or_labels_ending_label lineno_label
2068 | lineno_stmt_decl_or_labels_ending_error lineno_label
2069 ;
2071 lineno_stmt_decl_or_labels_ending_error:
2072 errstmt
2073 | lineno_stmt_decl_or_labels errstmt
2074 ;
2076 lineno_stmt_decl_or_labels:
2077 lineno_stmt_decl_or_labels_ending_stmt
2078 | lineno_stmt_decl_or_labels_ending_decl
2079 | lineno_stmt_decl_or_labels_ending_label
2080 | lineno_stmt_decl_or_labels_ending_error
2081 ;
2083 errstmt: error ';'
2084 ;
2086 pushlevel: /* empty */
2087 { pushlevel (0);
2088 clear_last_expr ();
2089 add_scope_stmt (/*begin_p=*/1, /*partial_p=*/0);
2090 ifobjc
2091 if (objc_method_context)
2092 add_objc_decls ();
2093 end ifobjc
2094 }
2095 ;
2097 poplevel: /* empty */
2098 { $$ = add_scope_stmt (/*begin_p=*/0, /*partial_p=*/0); }
2100 /* Start and end blocks created for the new scopes of C99. */
2101 c99_block_start: /* empty */
2102 { if (flag_isoc99)
2103 {
2104 $$ = c_begin_compound_stmt ();
2105 pushlevel (0);
2106 clear_last_expr ();
2107 add_scope_stmt (/*begin_p=*/1, /*partial_p=*/0);
2108 ifobjc
2109 if (objc_method_context)
2110 add_objc_decls ();
2111 end ifobjc
2112 }
2113 else
2114 $$ = NULL_TREE;
2115 }
2116 ;
2118 /* Productions using c99_block_start and c99_block_end will need to do what's
2119 in compstmt: RECHAIN_STMTS ($1, COMPOUND_BODY ($1)); $$ = $2; where
2120 $1 is the value of c99_block_start and $2 of c99_block_end. */
2121 c99_block_end: /* empty */
2122 { if (flag_isoc99)
2123 {
2124 tree scope_stmt = add_scope_stmt (/*begin_p=*/0, /*partial_p=*/0);
2125 $$ = poplevel (kept_level_p (), 0, 0);
2126 SCOPE_STMT_BLOCK (TREE_PURPOSE (scope_stmt))
2127 = SCOPE_STMT_BLOCK (TREE_VALUE (scope_stmt))
2128 = $$;
2129 }
2130 else
2131 $$ = NULL_TREE; }
2132 ;
2134 /* Read zero or more forward-declarations for labels
2135 that nested functions can jump to. */
2136 maybe_label_decls:
2137 /* empty */
2138 | label_decls
2139 { if (pedantic)
2140 pedwarn ("ISO C forbids label declarations"); }
2141 ;
2143 label_decls:
2144 label_decl
2145 | label_decls label_decl
2146 ;
2148 label_decl:
2149 LABEL identifiers_or_typenames ';'
2150 { tree link;
2151 for (link = $2; link; link = TREE_CHAIN (link))
2152 {
2153 tree label = shadow_label (TREE_VALUE (link));
2154 C_DECLARED_LABEL_FLAG (label) = 1;
2155 add_decl_stmt (label);
2156 }
2157 }
2158 ;
2160 /* This is the body of a function definition.
2161 It causes syntax errors to ignore to the next openbrace. */
2162 compstmt_or_error:
2163 compstmt
2164 {}
2165 | error compstmt
2166 ;
2168 compstmt_start: '{' { compstmt_count++;
2169 $$ = c_begin_compound_stmt (); }
2171 compstmt_nostart: '}'
2172 { $$ = convert (void_type_node, integer_zero_node); }
2173 | pushlevel maybe_label_decls compstmt_contents_nonempty '}' poplevel
2174 { $$ = poplevel (kept_level_p (), 1, 0);
2175 SCOPE_STMT_BLOCK (TREE_PURPOSE ($5))
2176 = SCOPE_STMT_BLOCK (TREE_VALUE ($5))
2177 = $$; }
2178 ;
2180 compstmt_contents_nonempty:
2181 stmts_and_decls
2182 | error
2183 ;
2185 compstmt_primary_start:
2186 '(' '{'
2187 { if (current_function_decl == 0)
2188 {
2189 error ("braced-group within expression allowed only inside a function");
2190 YYERROR;
2191 }
2192 /* We must force a BLOCK for this level
2193 so that, if it is not expanded later,
2194 there is a way to turn off the entire subtree of blocks
2195 that are contained in it. */
2196 keep_next_level ();
2197 push_label_level ();
2198 compstmt_count++;
2199 $$ = add_stmt (build_stmt (COMPOUND_STMT, last_tree));
2200 }
2202 compstmt: compstmt_start compstmt_nostart
2203 { RECHAIN_STMTS ($1, COMPOUND_BODY ($1));
2204 $$ = $1; }
2205 ;
2207 /* Value is number of statements counted as of the closeparen. */
2208 simple_if:
2209 if_prefix c99_block_lineno_labeled_stmt
2210 { c_finish_then (); }
2211 /* Make sure c_expand_end_cond is run once
2212 for each call to c_expand_start_cond.
2213 Otherwise a crash is likely. */
2214 | if_prefix error
2215 ;
2217 if_prefix:
2218 IF '(' expr ')'
2219 { c_expand_start_cond (truthvalue_conversion ($3),
2220 compstmt_count);
2221 $<itype>$ = stmt_count;
2222 if_stmt_file = $<filename>-2;
2223 if_stmt_line = $<lineno>-1; }
2224 ;
2226 /* This is a subroutine of stmt.
2227 It is used twice, once for valid DO statements
2228 and once for catching errors in parsing the end test. */
2229 do_stmt_start:
2230 DO
2231 { stmt_count++;
2232 compstmt_count++;
2233 $<ttype>$
2234 = add_stmt (build_stmt (DO_STMT, NULL_TREE,
2235 NULL_TREE));
2236 /* In the event that a parse error prevents
2237 parsing the complete do-statement, set the
2238 condition now. Otherwise, we can get crashes at
2239 RTL-generation time. */
2240 DO_COND ($<ttype>$) = error_mark_node; }
2241 c99_block_lineno_labeled_stmt WHILE
2242 { $$ = $<ttype>2;
2243 RECHAIN_STMTS ($$, DO_BODY ($$)); }
2244 ;
2246 /* The forced readahead in here is because we might be at the end of a
2247 line, and the line and file won't be bumped until yylex absorbs the
2248 first token on the next line. */
2249 save_filename:
2250 { if (yychar == YYEMPTY)
2251 yychar = YYLEX;
2252 $$ = input_filename; }
2253 ;
2255 save_lineno:
2256 { if (yychar == YYEMPTY)
2257 yychar = YYLEX;
2258 $$ = lineno; }
2259 ;
2261 lineno_labeled_stmt:
2262 lineno_stmt
2263 | lineno_label lineno_labeled_stmt
2264 ;
2266 /* Like lineno_labeled_stmt, but a block in C99. */
2267 c99_block_lineno_labeled_stmt:
2268 c99_block_start lineno_labeled_stmt c99_block_end
2269 { if (flag_isoc99)
2270 RECHAIN_STMTS ($1, COMPOUND_BODY ($1)); }
2271 ;
2273 lineno_stmt:
2274 save_filename save_lineno stmt
2275 { if ($3)
2276 {
2277 STMT_LINENO ($3) = $2;
2278 /* ??? We currently have no way of recording
2279 the filename for a statement. This probably
2280 matters little in practice at the moment,
2281 but I suspect that problems will ocurr when
2282 doing inlining at the tree level. */
2283 }
2284 }
2285 ;
2287 lineno_label:
2288 save_filename save_lineno label
2289 { if ($3)
2290 {
2291 STMT_LINENO ($3) = $2;
2292 }
2293 }
2294 ;
2296 select_or_iter_stmt:
2297 simple_if ELSE
2298 { c_expand_start_else ();
2299 $<itype>1 = stmt_count; }
2300 c99_block_lineno_labeled_stmt
2301 { c_finish_else ();
2302 c_expand_end_cond ();
2303 if (extra_warnings && stmt_count == $<itype>1)
2304 warning ("empty body in an else-statement"); }
2305 | simple_if %prec IF
2306 { c_expand_end_cond ();
2307 /* This warning is here instead of in simple_if, because we
2308 do not want a warning if an empty if is followed by an
2309 else statement. Increment stmt_count so we don't
2310 give a second error if this is a nested `if'. */
2311 if (extra_warnings && stmt_count++ == $<itype>1)
2312 warning_with_file_and_line (if_stmt_file, if_stmt_line,
2313 "empty body in an if-statement"); }
2314 /* Make sure c_expand_end_cond is run once
2315 for each call to c_expand_start_cond.
2316 Otherwise a crash is likely. */
2317 | simple_if ELSE error
2318 { c_expand_end_cond (); }
2319 | WHILE
2320 { stmt_count++; }
2321 '(' expr ')'
2322 { $4 = truthvalue_conversion ($4);
2323 $<ttype>$
2324 = add_stmt (build_stmt (WHILE_STMT, $4, NULL_TREE)); }
2325 c99_block_lineno_labeled_stmt
2326 { RECHAIN_STMTS ($<ttype>6, WHILE_BODY ($<ttype>6)); }
2327 | do_stmt_start
2328 '(' expr ')' ';'
2329 { DO_COND ($1) = truthvalue_conversion ($3); }
2330 | do_stmt_start error
2331 { }
2332 | FOR
2333 { $<ttype>$ = build_stmt (FOR_STMT, NULL_TREE, NULL_TREE,
2334 NULL_TREE, NULL_TREE);
2335 add_stmt ($<ttype>$); }
2336 '(' for_init_stmt
2337 { stmt_count++;
2338 RECHAIN_STMTS ($<ttype>2, FOR_INIT_STMT ($<ttype>2)); }
2339 xexpr ';'
2340 { if ($6)
2341 FOR_COND ($<ttype>2) = truthvalue_conversion ($6); }
2342 xexpr ')'
2343 { FOR_EXPR ($<ttype>2) = $9; }
2344 c99_block_lineno_labeled_stmt
2345 { RECHAIN_STMTS ($<ttype>2, FOR_BODY ($<ttype>2)); }
2346 | SWITCH '(' expr ')'
2347 { stmt_count++;
2348 $<ttype>$ = c_start_case ($3); }
2349 c99_block_lineno_labeled_stmt
2350 { c_finish_case (); }
2351 ;
2353 for_init_stmt:
2354 xexpr ';'
2355 { add_stmt (build_stmt (EXPR_STMT, $1)); }
2356 | decl
2357 { check_for_loop_decls (); }
2358 ;
2360 /* Parse a single real statement, not including any labels. */
2361 stmt:
2362 compstmt
2363 { stmt_count++; $$ = $1; }
2364 | expr ';'
2365 { stmt_count++;
2366 $$ = c_expand_expr_stmt ($1); }
2367 | c99_block_start select_or_iter_stmt c99_block_end
2368 { if (flag_isoc99)
2369 RECHAIN_STMTS ($1, COMPOUND_BODY ($1));
2370 $$ = NULL_TREE; }
2371 | BREAK ';'
2372 { stmt_count++;
2373 $$ = add_stmt (build_break_stmt ()); }
2374 | CONTINUE ';'
2375 { stmt_count++;
2376 $$ = add_stmt (build_continue_stmt ()); }
2377 | RETURN ';'
2378 { stmt_count++;
2379 $$ = c_expand_return (NULL_TREE); }
2380 | RETURN expr ';'
2381 { stmt_count++;
2382 $$ = c_expand_return ($2); }
2383 | ASM_KEYWORD maybe_type_qual '(' expr ')' ';'
2384 { stmt_count++;
2385 $$ = simple_asm_stmt ($4); }
2386 /* This is the case with just output operands. */
2387 | ASM_KEYWORD maybe_type_qual '(' expr ':' asm_operands ')' ';'
2388 { stmt_count++;
2389 $$ = build_asm_stmt ($2, $4, $6, NULL_TREE, NULL_TREE); }
2390 /* This is the case with input operands as well. */
2391 | ASM_KEYWORD maybe_type_qual '(' expr ':' asm_operands ':'
2392 asm_operands ')' ';'
2393 { stmt_count++;
2394 $$ = build_asm_stmt ($2, $4, $6, $8, NULL_TREE); }
2395 /* This is the case with clobbered registers as well. */
2396 | ASM_KEYWORD maybe_type_qual '(' expr ':' asm_operands ':'
2397 asm_operands ':' asm_clobbers ')' ';'
2398 { stmt_count++;
2399 $$ = build_asm_stmt ($2, $4, $6, $8, $10); }
2400 | GOTO identifier ';'
2401 { tree decl;
2402 stmt_count++;
2403 decl = lookup_label ($2);
2404 if (decl != 0)
2405 {
2406 TREE_USED (decl) = 1;
2407 $$ = add_stmt (build_stmt (GOTO_STMT, decl));
2408 }
2409 else
2410 $$ = NULL_TREE;
2411 }
2412 | GOTO '*' expr ';'
2413 { if (pedantic)
2414 pedwarn ("ISO C forbids `goto *expr;'");
2415 stmt_count++;
2416 $3 = convert (ptr_type_node, $3);
2417 $$ = add_stmt (build_stmt (GOTO_STMT, $3)); }
2418 | ';'
2419 { $$ = NULL_TREE; }
2420 ;
2422 /* Any kind of label, including jump labels and case labels.
2423 ANSI C accepts labels only before statements, but we allow them
2424 also at the end of a compound statement. */
2426 label: CASE expr_no_commas ':'
2427 { stmt_count++;
2428 $$ = do_case ($2, NULL_TREE); }
2429 | CASE expr_no_commas ELLIPSIS expr_no_commas ':'
2430 { stmt_count++;
2431 $$ = do_case ($2, $4); }
2432 | DEFAULT ':'
2433 { stmt_count++;
2434 $$ = do_case (NULL_TREE, NULL_TREE); }
2435 | identifier save_filename save_lineno ':' maybe_attribute
2436 { tree label = define_label ($2, $3, $1);
2437 stmt_count++;
2438 if (label)
2439 {
2440 decl_attributes (label, $5, NULL_TREE);
2441 $$ = add_stmt (build_stmt (LABEL_STMT, label));
2442 }
2443 else
2444 $$ = NULL_TREE;
2445 }
2446 ;
2448 /* Either a type-qualifier or nothing. First thing in an `asm' statement. */
2450 maybe_type_qual:
2451 /* empty */
2452 { emit_line_note (input_filename, lineno);
2453 $$ = NULL_TREE; }
2454 | TYPE_QUAL
2455 { emit_line_note (input_filename, lineno); }
2456 ;
2458 xexpr:
2459 /* empty */
2460 { $$ = NULL_TREE; }
2461 | expr
2462 ;
2464 /* These are the operands other than the first string and colon
2465 in asm ("addextend %2,%1": "=dm" (x), "0" (y), "g" (*x)) */
2466 asm_operands: /* empty */
2467 { $$ = NULL_TREE; }
2468 | nonnull_asm_operands
2469 ;
2471 nonnull_asm_operands:
2472 asm_operand
2473 | nonnull_asm_operands ',' asm_operand
2474 { $$ = chainon ($1, $3); }
2475 ;
2477 asm_operand:
2478 STRING '(' expr ')'
2479 { $$ = build_tree_list ($1, $3); }
2480 ;
2482 asm_clobbers:
2483 string
2484 { $$ = tree_cons (NULL_TREE, combine_strings ($1), NULL_TREE); }
2485 | asm_clobbers ',' string
2486 { $$ = tree_cons (NULL_TREE, combine_strings ($3), $1); }
2487 ;
2488 \f
2489 /* This is what appears inside the parens in a function declarator.
2490 Its value is a list of ..._TYPE nodes. Attributes must appear here
2491 to avoid a conflict with their appearance after an open parenthesis
2492 in an abstract declarator, as in
2493 "void bar (int (__attribute__((__mode__(SI))) int foo));". */
2494 parmlist:
2495 maybe_attribute
2496 { pushlevel (0);
2497 clear_parm_order ();
2498 declare_parm_level (0); }
2499 parmlist_1
2500 { $$ = $3;
2501 parmlist_tags_warning ();
2502 poplevel (0, 0, 0); }
2503 ;
2505 parmlist_1:
2506 parmlist_2 ')'
2507 | parms ';'
2508 { tree parm;
2509 if (pedantic)
2510 pedwarn ("ISO C forbids forward parameter declarations");
2511 /* Mark the forward decls as such. */
2512 for (parm = getdecls (); parm; parm = TREE_CHAIN (parm))
2513 TREE_ASM_WRITTEN (parm) = 1;
2514 clear_parm_order (); }
2515 maybe_attribute
2516 { /* Dummy action so attributes are in known place
2517 on parser stack. */ }
2518 parmlist_1
2519 { $$ = $6; }
2520 | error ')'
2521 { $$ = tree_cons (NULL_TREE, NULL_TREE, NULL_TREE); }
2522 ;
2524 /* This is what appears inside the parens in a function declarator.
2525 Is value is represented in the format that grokdeclarator expects. */
2526 parmlist_2: /* empty */
2527 { $$ = get_parm_info (0); }
2528 | ELLIPSIS
2529 { $$ = get_parm_info (0);
2530 /* Gcc used to allow this as an extension. However, it does
2531 not work for all targets, and thus has been disabled.
2532 Also, since func (...) and func () are indistinguishable,
2533 it caused problems with the code in expand_builtin which
2534 tries to verify that BUILT_IN_NEXT_ARG is being used
2535 correctly. */
2536 error ("ISO C requires a named argument before `...'");
2537 }
2538 | parms
2539 { $$ = get_parm_info (1); }
2540 | parms ',' ELLIPSIS
2541 { $$ = get_parm_info (0); }
2542 ;
2544 parms:
2545 firstparm
2546 { push_parm_decl ($1); }
2547 | parms ',' parm
2548 { push_parm_decl ($3); }
2549 ;
2551 /* A single parameter declaration or parameter type name,
2552 as found in a parmlist. */
2553 parm:
2554 declspecs_ts setspecs parm_declarator maybe_attribute
2555 { $$ = build_tree_list (build_tree_list (current_declspecs,
2556 $3),
2557 build_tree_list (prefix_attributes,
2558 $4));
2559 current_declspecs = TREE_VALUE (declspec_stack);
2560 prefix_attributes = TREE_PURPOSE (declspec_stack);
2561 declspec_stack = TREE_CHAIN (declspec_stack); }
2562 | declspecs_ts setspecs notype_declarator maybe_attribute
2563 { $$ = build_tree_list (build_tree_list (current_declspecs,
2564 $3),
2565 build_tree_list (prefix_attributes,
2566 $4));
2567 current_declspecs = TREE_VALUE (declspec_stack);
2568 prefix_attributes = TREE_PURPOSE (declspec_stack);
2569 declspec_stack = TREE_CHAIN (declspec_stack); }
2570 | declspecs_ts setspecs absdcl_maybe_attribute
2571 { $$ = $3;
2572 current_declspecs = TREE_VALUE (declspec_stack);
2573 prefix_attributes = TREE_PURPOSE (declspec_stack);
2574 declspec_stack = TREE_CHAIN (declspec_stack); }
2575 | declspecs_nots setspecs notype_declarator maybe_attribute
2576 { $$ = build_tree_list (build_tree_list (current_declspecs,
2577 $3),
2578 build_tree_list (prefix_attributes,
2579 $4));
2580 current_declspecs = TREE_VALUE (declspec_stack);
2581 prefix_attributes = TREE_PURPOSE (declspec_stack);
2582 declspec_stack = TREE_CHAIN (declspec_stack); }
2584 | declspecs_nots setspecs absdcl_maybe_attribute
2585 { $$ = $3;
2586 current_declspecs = TREE_VALUE (declspec_stack);
2587 prefix_attributes = TREE_PURPOSE (declspec_stack);
2588 declspec_stack = TREE_CHAIN (declspec_stack); }
2589 ;
2591 /* The first parm, which must suck attributes from off the top of the parser
2592 stack. */
2593 firstparm:
2594 declspecs_ts_nosa setspecs_fp parm_declarator maybe_attribute
2595 { $$ = build_tree_list (build_tree_list (current_declspecs,
2596 $3),
2597 build_tree_list (prefix_attributes,
2598 $4));
2599 current_declspecs = TREE_VALUE (declspec_stack);
2600 prefix_attributes = TREE_PURPOSE (declspec_stack);
2601 declspec_stack = TREE_CHAIN (declspec_stack); }
2602 | declspecs_ts_nosa setspecs_fp notype_declarator maybe_attribute
2603 { $$ = build_tree_list (build_tree_list (current_declspecs,
2604 $3),
2605 build_tree_list (prefix_attributes,
2606 $4));
2607 current_declspecs = TREE_VALUE (declspec_stack);
2608 prefix_attributes = TREE_PURPOSE (declspec_stack);
2609 declspec_stack = TREE_CHAIN (declspec_stack); }
2610 | declspecs_ts_nosa setspecs_fp absdcl_maybe_attribute
2611 { $$ = $3;
2612 current_declspecs = TREE_VALUE (declspec_stack);
2613 prefix_attributes = TREE_PURPOSE (declspec_stack);
2614 declspec_stack = TREE_CHAIN (declspec_stack); }
2615 | declspecs_nots_nosa setspecs_fp notype_declarator maybe_attribute
2616 { $$ = build_tree_list (build_tree_list (current_declspecs,
2617 $3),
2618 build_tree_list (prefix_attributes,
2619 $4));
2620 current_declspecs = TREE_VALUE (declspec_stack);
2621 prefix_attributes = TREE_PURPOSE (declspec_stack);
2622 declspec_stack = TREE_CHAIN (declspec_stack); }
2624 | declspecs_nots_nosa setspecs_fp absdcl_maybe_attribute
2625 { $$ = $3;
2626 current_declspecs = TREE_VALUE (declspec_stack);
2627 prefix_attributes = TREE_PURPOSE (declspec_stack);
2628 declspec_stack = TREE_CHAIN (declspec_stack); }
2629 ;
2631 setspecs_fp:
2632 setspecs
2633 { prefix_attributes = chainon (prefix_attributes, $<ttype>-2); }
2634 ;
2636 /* This is used in a function definition
2637 where either a parmlist or an identifier list is ok.
2638 Its value is a list of ..._TYPE nodes or a list of identifiers. */
2639 parmlist_or_identifiers:
2640 { pushlevel (0);
2641 clear_parm_order ();
2642 declare_parm_level (1); }
2643 parmlist_or_identifiers_1
2644 { $$ = $2;
2645 parmlist_tags_warning ();
2646 poplevel (0, 0, 0); }
2647 ;
2649 parmlist_or_identifiers_1:
2650 parmlist_1
2651 | identifiers ')'
2652 { tree t;
2653 for (t = $1; t; t = TREE_CHAIN (t))
2654 if (TREE_VALUE (t) == NULL_TREE)
2655 error ("`...' in old-style identifier list");
2656 $$ = tree_cons (NULL_TREE, NULL_TREE, $1); }
2657 ;
2659 /* A nonempty list of identifiers. */
2660 identifiers:
2661 IDENTIFIER
2662 { $$ = build_tree_list (NULL_TREE, $1); }
2663 | identifiers ',' IDENTIFIER
2664 { $$ = chainon ($1, build_tree_list (NULL_TREE, $3)); }
2665 ;
2667 /* A nonempty list of identifiers, including typenames. */
2668 identifiers_or_typenames:
2669 identifier
2670 { $$ = build_tree_list (NULL_TREE, $1); }
2671 | identifiers_or_typenames ',' identifier
2672 { $$ = chainon ($1, build_tree_list (NULL_TREE, $3)); }
2673 ;
2675 extension:
2676 EXTENSION
2677 { $$ = SAVE_WARN_FLAGS();
2678 pedantic = 0;
2679 warn_pointer_arith = 0; }
2680 ;
2681 \f
2682 ifobjc
2683 /* Objective-C productions. */
2685 objcdef:
2686 classdef
2687 | classdecl
2688 | aliasdecl
2689 | protocoldef
2690 | methoddef
2691 | END
2692 {
2693 if (objc_implementation_context)
2694 {
2695 finish_class (objc_implementation_context);
2696 objc_ivar_chain = NULL_TREE;
2697 objc_implementation_context = NULL_TREE;
2698 }
2699 else
2700 warning ("`@end' must appear in an implementation context");
2701 }
2702 ;
2704 /* A nonempty list of identifiers. */
2705 identifier_list:
2706 identifier
2707 { $$ = build_tree_list (NULL_TREE, $1); }
2708 | identifier_list ',' identifier
2709 { $$ = chainon ($1, build_tree_list (NULL_TREE, $3)); }
2710 ;
2712 classdecl:
2713 CLASS identifier_list ';'
2714 {
2715 objc_declare_class ($2);
2716 }
2718 aliasdecl:
2719 ALIAS identifier identifier ';'
2720 {
2721 objc_declare_alias ($2, $3);
2722 }
2724 classdef:
2725 INTERFACE identifier protocolrefs '{'
2726 {
2727 objc_interface_context = objc_ivar_context
2728 = start_class (CLASS_INTERFACE_TYPE, $2, NULL_TREE, $3);
2729 objc_public_flag = 0;
2730 }
2731 ivar_decl_list '}'
2732 {
2733 continue_class (objc_interface_context);
2734 }
2735 methodprotolist
2736 END
2737 {
2738 finish_class (objc_interface_context);
2739 objc_interface_context = NULL_TREE;
2740 }
2742 | INTERFACE identifier protocolrefs
2743 {
2744 objc_interface_context
2745 = start_class (CLASS_INTERFACE_TYPE, $2, NULL_TREE, $3);
2746 continue_class (objc_interface_context);
2747 }
2748 methodprotolist
2749 END
2750 {
2751 finish_class (objc_interface_context);
2752 objc_interface_context = NULL_TREE;
2753 }
2755 | INTERFACE identifier ':' identifier protocolrefs '{'
2756 {
2757 objc_interface_context = objc_ivar_context
2758 = start_class (CLASS_INTERFACE_TYPE, $2, $4, $5);
2759 objc_public_flag = 0;
2760 }
2761 ivar_decl_list '}'
2762 {
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
2775 = start_class (CLASS_INTERFACE_TYPE, $2, $4, $5);
2776 continue_class (objc_interface_context);
2777 }
2778 methodprotolist
2779 END
2780 {
2781 finish_class (objc_interface_context);
2782 objc_interface_context = NULL_TREE;
2783 }
2785 | IMPLEMENTATION identifier '{'
2786 {
2787 objc_implementation_context = objc_ivar_context
2788 = start_class (CLASS_IMPLEMENTATION_TYPE, $2, NULL_TREE, NULL_TREE);
2789 objc_public_flag = 0;
2790 }
2791 ivar_decl_list '}'
2792 {
2793 objc_ivar_chain
2794 = continue_class (objc_implementation_context);
2795 }
2797 | IMPLEMENTATION identifier
2798 {
2799 objc_implementation_context
2800 = start_class (CLASS_IMPLEMENTATION_TYPE, $2, NULL_TREE, NULL_TREE);
2801 objc_ivar_chain
2802 = continue_class (objc_implementation_context);
2803 }
2805 | IMPLEMENTATION identifier ':' identifier '{'
2806 {
2807 objc_implementation_context = objc_ivar_context
2808 = start_class (CLASS_IMPLEMENTATION_TYPE, $2, $4, NULL_TREE);
2809 objc_public_flag = 0;
2810 }
2811 ivar_decl_list '}'
2812 {
2813 objc_ivar_chain
2814 = continue_class (objc_implementation_context);
2815 }
2817 | IMPLEMENTATION identifier ':' identifier
2818 {
2819 objc_implementation_context
2820 = start_class (CLASS_IMPLEMENTATION_TYPE, $2, $4, NULL_TREE);
2821 objc_ivar_chain
2822 = continue_class (objc_implementation_context);
2823 }
2825 | INTERFACE identifier '(' identifier ')' protocolrefs
2826 {
2827 objc_interface_context
2828 = start_class (CATEGORY_INTERFACE_TYPE, $2, $4, $6);
2829 continue_class (objc_interface_context);
2830 }
2831 methodprotolist
2832 END
2833 {
2834 finish_class (objc_interface_context);
2835 objc_interface_context = NULL_TREE;
2836 }
2838 | IMPLEMENTATION identifier '(' identifier ')'
2839 {
2840 objc_implementation_context
2841 = start_class (CATEGORY_IMPLEMENTATION_TYPE, $2, $4, NULL_TREE);
2842 objc_ivar_chain
2843 = continue_class (objc_implementation_context);
2844 }
2845 ;
2847 protocoldef:
2848 PROTOCOL identifier protocolrefs
2849 {
2850 remember_protocol_qualifiers ();
2851 objc_interface_context
2852 = start_protocol(PROTOCOL_INTERFACE_TYPE, $2, $3);
2853 }
2854 methodprotolist END
2855 {
2856 forget_protocol_qualifiers();
2857 finish_protocol(objc_interface_context);
2858 objc_interface_context = NULL_TREE;
2859 }
2860 ;
2862 protocolrefs:
2863 /* empty */
2864 {
2865 $$ = NULL_TREE;
2866 }
2867 | non_empty_protocolrefs
2868 ;
2870 non_empty_protocolrefs:
2871 ARITHCOMPARE identifier_list ARITHCOMPARE
2872 {
2873 if ($1 == LT_EXPR && $3 == GT_EXPR)
2874 $$ = $2;
2875 else
2876 YYERROR1;
2877 }
2878 ;
2880 ivar_decl_list:
2881 ivar_decl_list visibility_spec ivar_decls
2882 | ivar_decls
2883 ;
2885 visibility_spec:
2886 PRIVATE { objc_public_flag = 2; }
2887 | PROTECTED { objc_public_flag = 0; }
2888 | PUBLIC { objc_public_flag = 1; }
2889 ;
2891 ivar_decls:
2892 /* empty */
2893 {
2894 $$ = NULL_TREE;
2895 }
2896 | ivar_decls ivar_decl ';'
2897 | ivar_decls ';'
2898 {
2899 if (pedantic)
2900 pedwarn ("extra semicolon in struct or union specified");
2901 }
2902 ;
2905 /* There is a shift-reduce conflict here, because `components' may
2906 start with a `typename'. It happens that shifting (the default resolution)
2907 does the right thing, because it treats the `typename' as part of
2908 a `typed_typespecs'.
2910 It is possible that this same technique would allow the distinction
2911 between `notype_initdecls' and `initdecls' to be eliminated.
2912 But I am being cautious and not trying it. */
2914 ivar_decl:
2915 declspecs_nosc_ts setspecs ivars
2916 { $$ = $3;
2917 current_declspecs = TREE_VALUE (declspec_stack);
2918 prefix_attributes = TREE_PURPOSE (declspec_stack);
2919 declspec_stack = TREE_CHAIN (declspec_stack); }
2920 | declspecs_nosc_nots setspecs ivars
2921 { $$ = $3;
2922 current_declspecs = TREE_VALUE (declspec_stack);
2923 prefix_attributes = TREE_PURPOSE (declspec_stack);
2924 declspec_stack = TREE_CHAIN (declspec_stack); }
2925 | error
2926 { $$ = NULL_TREE; }
2927 ;
2929 ivars:
2930 /* empty */
2931 { $$ = NULL_TREE; }
2932 | ivar_declarator
2933 | ivars ',' maybe_setattrs ivar_declarator
2934 ;
2936 ivar_declarator:
2937 declarator
2938 {
2939 $$ = add_instance_variable (objc_ivar_context,
2940 objc_public_flag,
2941 $1, current_declspecs,
2942 NULL_TREE);
2943 }
2944 | declarator ':' expr_no_commas
2945 {
2946 $$ = add_instance_variable (objc_ivar_context,
2947 objc_public_flag,
2948 $1, current_declspecs, $3);
2949 }
2950 | ':' expr_no_commas
2951 {
2952 $$ = add_instance_variable (objc_ivar_context,
2953 objc_public_flag,
2954 NULL_TREE,
2955 current_declspecs, $2);
2956 }
2957 ;
2959 methoddef:
2960 '+'
2961 {
2962 remember_protocol_qualifiers ();
2963 if (objc_implementation_context)
2964 objc_inherit_code = CLASS_METHOD_DECL;
2965 else
2966 fatal_error ("method definition not in class context");
2967 }
2968 methoddecl
2969 {
2970 forget_protocol_qualifiers ();
2971 add_class_method (objc_implementation_context, $3);
2972 start_method_def ($3);
2973 objc_method_context = $3;
2974 }
2975 optarglist
2976 {
2977 continue_method_def ();
2978 }
2979 compstmt_or_error
2980 {
2981 finish_method_def ();
2982 objc_method_context = NULL_TREE;
2983 }
2985 | '-'
2986 {
2987 remember_protocol_qualifiers ();
2988 if (objc_implementation_context)
2989 objc_inherit_code = INSTANCE_METHOD_DECL;
2990 else
2991 fatal_error ("method definition not in class context");
2992 }
2993 methoddecl
2994 {
2995 forget_protocol_qualifiers ();
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 '+'
3034 {
3035 /* Remember protocol qualifiers in prototypes. */
3036 remember_protocol_qualifiers ();
3037 objc_inherit_code = CLASS_METHOD_DECL;
3038 }
3039 methoddecl
3040 {
3041 /* Forget protocol qualifiers here. */
3042 forget_protocol_qualifiers ();
3043 add_class_method (objc_interface_context, $3);
3044 }
3045 semi_or_error
3047 | '-'
3048 {
3049 /* Remember protocol qualifiers in prototypes. */
3050 remember_protocol_qualifiers ();
3051 objc_inherit_code = INSTANCE_METHOD_DECL;
3052 }
3053 methoddecl
3054 {
3055 /* Forget protocol qualifiers here. */
3056 forget_protocol_qualifiers ();
3057 add_instance_method (objc_interface_context, $3);
3058 }
3059 semi_or_error
3060 ;
3062 methoddecl:
3063 '(' typename ')' unaryselector
3064 {
3065 $$ = build_method_decl (objc_inherit_code, $2, $4, NULL_TREE);
3066 }
3068 | unaryselector
3069 {
3070 $$ = build_method_decl (objc_inherit_code, NULL_TREE, $1, NULL_TREE);
3071 }
3073 | '(' typename ')' keywordselector optparmlist
3074 {
3075 $$ = build_method_decl (objc_inherit_code, $2, $4, $5);
3076 }
3078 | keywordselector optparmlist
3079 {
3080 $$ = build_method_decl (objc_inherit_code, NULL_TREE, $1, $2);
3081 }
3082 ;
3084 /* "optarglist" assumes that start_method_def has already been called...
3085 if it is not, the "xdecls" will not be placed in the proper scope */
3087 optarglist:
3088 /* empty */
3089 | ';' myxdecls
3090 ;
3092 /* to get around the following situation: "int foo (int a) int b; {}" that
3093 is synthesized when parsing "- a:a b:b; id c; id d; { ... }" */
3095 myxdecls:
3096 /* empty */
3097 | mydecls
3098 ;
3100 mydecls:
3101 mydecl
3102 | errstmt
3103 | mydecls mydecl
3104 | mydecl errstmt
3105 ;
3107 mydecl:
3108 declspecs_ts setspecs myparms ';'
3109 { current_declspecs = TREE_VALUE (declspec_stack);
3110 prefix_attributes = TREE_PURPOSE (declspec_stack);
3111 declspec_stack = TREE_CHAIN (declspec_stack); }
3112 | declspecs_ts ';'
3113 { shadow_tag ($1); }
3114 | declspecs_nots ';'
3115 { pedwarn ("empty declaration"); }
3116 ;
3118 myparms:
3119 myparm
3120 { push_parm_decl ($1); }
3121 | myparms ',' myparm
3122 { push_parm_decl ($3); }
3123 ;
3125 /* A single parameter declaration or parameter type name,
3126 as found in a parmlist. DOES NOT ALLOW AN INITIALIZER OR ASMSPEC */
3128 myparm:
3129 parm_declarator maybe_attribute
3130 { $$ = build_tree_list (build_tree_list (current_declspecs,
3131 $1),
3132 build_tree_list (prefix_attributes,
3133 $2)); }
3134 | notype_declarator maybe_attribute
3135 { $$ = build_tree_list (build_tree_list (current_declspecs,
3136 $1),
3137 build_tree_list (prefix_attributes,
3138 $2)); }
3139 | absdcl_maybe_attribute
3140 { $$ = $1; }
3141 ;
3143 optparmlist:
3144 /* empty */
3145 {
3146 $$ = NULL_TREE;
3147 }
3148 | ',' ELLIPSIS
3149 {
3150 /* oh what a kludge! */
3151 $$ = objc_ellipsis_node;
3152 }
3153 | ','
3154 {
3155 pushlevel (0);
3156 }
3157 parmlist_2
3158 {
3159 /* returns a tree list node generated by get_parm_info */
3160 $$ = $3;
3161 poplevel (0, 0, 0);
3162 }
3163 ;
3165 unaryselector:
3166 selector
3167 ;
3169 keywordselector:
3170 keyworddecl
3172 | keywordselector keyworddecl
3173 {
3174 $$ = chainon ($1, $2);
3175 }
3176 ;
3178 selector:
3179 IDENTIFIER
3180 | TYPENAME
3181 | OBJECTNAME
3182 | reservedwords
3183 ;
3185 reservedwords:
3186 ENUM | STRUCT | UNION | IF | ELSE | WHILE | DO | FOR
3187 | SWITCH | CASE | DEFAULT | BREAK | CONTINUE | RETURN
3188 | GOTO | ASM_KEYWORD | SIZEOF | TYPEOF | ALIGNOF
3189 | TYPESPEC | TYPE_QUAL
3190 ;
3192 keyworddecl:
3193 selector ':' '(' typename ')' identifier
3194 {
3195 $$ = build_keyword_decl ($1, $4, $6);
3196 }
3198 | selector ':' identifier
3199 {
3200 $$ = build_keyword_decl ($1, NULL_TREE, $3);
3201 }
3203 | ':' '(' typename ')' identifier
3204 {
3205 $$ = build_keyword_decl (NULL_TREE, $3, $5);
3206 }
3208 | ':' identifier
3209 {
3210 $$ = build_keyword_decl (NULL_TREE, NULL_TREE, $2);
3211 }
3212 ;
3214 messageargs:
3215 selector
3216 | keywordarglist
3217 ;
3219 keywordarglist:
3220 keywordarg
3221 | keywordarglist keywordarg
3222 {
3223 $$ = chainon ($1, $2);
3224 }
3225 ;
3228 keywordexpr:
3229 nonnull_exprlist
3230 {
3231 if (TREE_CHAIN ($1) == NULL_TREE)
3232 /* just return the expr., remove a level of indirection */
3233 $$ = TREE_VALUE ($1);
3234 else
3235 /* we have a comma expr., we will collapse later */
3236 $$ = $1;
3237 }
3238 ;
3240 keywordarg:
3241 selector ':' keywordexpr
3242 {
3243 $$ = build_tree_list ($1, $3);
3244 }
3245 | ':' keywordexpr
3246 {
3247 $$ = build_tree_list (NULL_TREE, $2);
3248 }
3249 ;
3251 receiver:
3252 expr
3253 | CLASSNAME
3254 {
3255 $$ = get_class_reference ($1);
3256 }
3257 ;
3259 objcmessageexpr:
3260 '['
3261 { objc_receiver_context = 1; }
3262 receiver
3263 { objc_receiver_context = 0; }
3264 messageargs ']'
3265 {
3266 $$ = build_tree_list ($3, $5);
3267 }
3268 ;
3270 selectorarg:
3271 selector
3272 | keywordnamelist
3273 ;
3275 keywordnamelist:
3276 keywordname
3277 | keywordnamelist keywordname
3278 {
3279 $$ = chainon ($1, $2);
3280 }
3281 ;
3283 keywordname:
3284 selector ':'
3285 {
3286 $$ = build_tree_list ($1, NULL_TREE);
3287 }
3288 | ':'
3289 {
3290 $$ = build_tree_list (NULL_TREE, NULL_TREE);
3291 }
3292 ;
3294 objcselectorexpr:
3295 SELECTOR '(' selectorarg ')'
3296 {
3297 $$ = $3;
3298 }
3299 ;
3301 objcprotocolexpr:
3302 PROTOCOL '(' identifier ')'
3303 {
3304 $$ = $3;
3305 }
3306 ;
3308 /* extension to support C-structures in the archiver */
3310 objcencodeexpr:
3311 ENCODE '(' typename ')'
3312 {
3313 $$ = groktypename ($3);
3314 }
3315 ;
3317 end ifobjc
3318 %%
3320 /* yylex() is a thin wrapper around c_lex(), all it does is translate
3321 cpplib.h's token codes into yacc's token codes. */
3323 static enum cpp_ttype last_token;
3325 /* The reserved keyword table. */
3326 struct resword
3327 {
3328 const char *word;
3329 ENUM_BITFIELD(rid) rid : 16;
3330 unsigned int disable : 16;
3331 };
3333 /* Disable mask. Keywords are disabled if (reswords[i].disable & mask) is
3334 _true_. */
3335 #define D_TRAD 0x01 /* not in traditional C */
3336 #define D_C89 0x02 /* not in C89 */
3337 #define D_EXT 0x04 /* GCC extension */
3338 #define D_EXT89 0x08 /* GCC extension incorporated in C99 */
3339 #define D_OBJC 0x10 /* Objective C only */
3341 static const struct resword reswords[] =
3342 {
3343 { "_Bool", RID_BOOL, 0 },
3344 { "_Complex", RID_COMPLEX, 0 },
3345 { "__FUNCTION__", RID_FUNCTION_NAME, 0 },
3346 { "__PRETTY_FUNCTION__", RID_PRETTY_FUNCTION_NAME, 0 },
3347 { "__alignof", RID_ALIGNOF, 0 },
3348 { "__alignof__", RID_ALIGNOF, 0 },
3349 { "__asm", RID_ASM, 0 },
3350 { "__asm__", RID_ASM, 0 },
3351 { "__attribute", RID_ATTRIBUTE, 0 },
3352 { "__attribute__", RID_ATTRIBUTE, 0 },
3353 { "__bounded", RID_BOUNDED, 0 },
3354 { "__bounded__", RID_BOUNDED, 0 },
3355 { "__builtin_va_arg", RID_VA_ARG, 0 },
3356 { "__complex", RID_COMPLEX, 0 },
3357 { "__complex__", RID_COMPLEX, 0 },
3358 { "__const", RID_CONST, 0 },
3359 { "__const__", RID_CONST, 0 },
3360 { "__extension__", RID_EXTENSION, 0 },
3361 { "__func__", RID_C99_FUNCTION_NAME, 0 },
3362 { "__imag", RID_IMAGPART, 0 },
3363 { "__imag__", RID_IMAGPART, 0 },
3364 { "__inline", RID_INLINE, 0 },
3365 { "__inline__", RID_INLINE, 0 },
3366 { "__label__", RID_LABEL, 0 },
3367 { "__ptrbase", RID_PTRBASE, 0 },
3368 { "__ptrbase__", RID_PTRBASE, 0 },
3369 { "__ptrextent", RID_PTREXTENT, 0 },
3370 { "__ptrextent__", RID_PTREXTENT, 0 },
3371 { "__ptrvalue", RID_PTRVALUE, 0 },
3372 { "__ptrvalue__", RID_PTRVALUE, 0 },
3373 { "__real", RID_REALPART, 0 },
3374 { "__real__", RID_REALPART, 0 },
3375 { "__restrict", RID_RESTRICT, 0 },
3376 { "__restrict__", RID_RESTRICT, 0 },
3377 { "__signed", RID_SIGNED, 0 },
3378 { "__signed__", RID_SIGNED, 0 },
3379 { "__typeof", RID_TYPEOF, 0 },
3380 { "__typeof__", RID_TYPEOF, 0 },
3381 { "__unbounded", RID_UNBOUNDED, 0 },
3382 { "__unbounded__", RID_UNBOUNDED, 0 },
3383 { "__volatile", RID_VOLATILE, 0 },
3384 { "__volatile__", RID_VOLATILE, 0 },
3385 { "asm", RID_ASM, D_EXT },
3386 { "auto", RID_AUTO, 0 },
3387 { "break", RID_BREAK, 0 },
3388 { "case", RID_CASE, 0 },
3389 { "char", RID_CHAR, 0 },
3390 { "const", RID_CONST, D_TRAD },
3391 { "continue", RID_CONTINUE, 0 },
3392 { "default", RID_DEFAULT, 0 },
3393 { "do", RID_DO, 0 },
3394 { "double", RID_DOUBLE, 0 },
3395 { "else", RID_ELSE, 0 },
3396 { "enum", RID_ENUM, 0 },
3397 { "extern", RID_EXTERN, 0 },
3398 { "float", RID_FLOAT, 0 },
3399 { "for", RID_FOR, 0 },
3400 { "goto", RID_GOTO, 0 },
3401 { "if", RID_IF, 0 },
3402 { "inline", RID_INLINE, D_TRAD|D_EXT89 },
3403 { "int", RID_INT, 0 },
3404 { "long", RID_LONG, 0 },
3405 { "register", RID_REGISTER, 0 },
3406 { "restrict", RID_RESTRICT, D_TRAD|D_C89 },
3407 { "return", RID_RETURN, 0 },
3408 { "short", RID_SHORT, 0 },
3409 { "signed", RID_SIGNED, D_TRAD },
3410 { "sizeof", RID_SIZEOF, 0 },
3411 { "static", RID_STATIC, 0 },
3412 { "struct", RID_STRUCT, 0 },
3413 { "switch", RID_SWITCH, 0 },
3414 { "typedef", RID_TYPEDEF, 0 },
3415 { "typeof", RID_TYPEOF, D_TRAD|D_EXT },
3416 { "union", RID_UNION, 0 },
3417 { "unsigned", RID_UNSIGNED, 0 },
3418 { "void", RID_VOID, 0 },
3419 { "volatile", RID_VOLATILE, D_TRAD },
3420 { "while", RID_WHILE, 0 },
3421 ifobjc
3422 { "@class", RID_AT_CLASS, D_OBJC },
3423 { "@compatibility_alias", RID_AT_ALIAS, D_OBJC },
3424 { "@defs", RID_AT_DEFS, D_OBJC },
3425 { "@encode", RID_AT_ENCODE, D_OBJC },
3426 { "@end", RID_AT_END, D_OBJC },
3427 { "@implementation", RID_AT_IMPLEMENTATION, D_OBJC },
3428 { "@interface", RID_AT_INTERFACE, D_OBJC },
3429 { "@private", RID_AT_PRIVATE, D_OBJC },
3430 { "@protected", RID_AT_PROTECTED, D_OBJC },
3431 { "@protocol", RID_AT_PROTOCOL, D_OBJC },
3432 { "@public", RID_AT_PUBLIC, D_OBJC },
3433 { "@selector", RID_AT_SELECTOR, D_OBJC },
3434 { "id", RID_ID, D_OBJC },
3435 { "bycopy", RID_BYCOPY, D_OBJC },
3436 { "byref", RID_BYREF, D_OBJC },
3437 { "in", RID_IN, D_OBJC },
3438 { "inout", RID_INOUT, D_OBJC },
3439 { "oneway", RID_ONEWAY, D_OBJC },
3440 { "out", RID_OUT, D_OBJC },
3441 end ifobjc
3442 };
3443 #define N_reswords (sizeof reswords / sizeof (struct resword))
3445 /* Table mapping from RID_* constants to yacc token numbers.
3446 Unfortunately we have to have entries for all the keywords in all
3447 three languages. */
3448 static const short rid_to_yy[RID_MAX] =
3449 {
3450 /* RID_STATIC */ SCSPEC,
3451 /* RID_UNSIGNED */ TYPESPEC,
3452 /* RID_LONG */ TYPESPEC,
3453 /* RID_CONST */ TYPE_QUAL,
3454 /* RID_EXTERN */ SCSPEC,
3455 /* RID_REGISTER */ SCSPEC,
3456 /* RID_TYPEDEF */ SCSPEC,
3457 /* RID_SHORT */ TYPESPEC,
3458 /* RID_INLINE */ SCSPEC,
3459 /* RID_VOLATILE */ TYPE_QUAL,
3460 /* RID_SIGNED */ TYPESPEC,
3461 /* RID_AUTO */ SCSPEC,
3462 /* RID_RESTRICT */ TYPE_QUAL,
3464 /* C extensions */
3465 /* RID_BOUNDED */ TYPE_QUAL,
3466 /* RID_UNBOUNDED */ TYPE_QUAL,
3467 /* RID_COMPLEX */ TYPESPEC,
3469 /* C++ */
3470 /* RID_FRIEND */ 0,
3471 /* RID_VIRTUAL */ 0,
3472 /* RID_EXPLICIT */ 0,
3473 /* RID_EXPORT */ 0,
3474 /* RID_MUTABLE */ 0,
3476 /* ObjC */
3477 /* RID_IN */ TYPE_QUAL,
3478 /* RID_OUT */ TYPE_QUAL,
3479 /* RID_INOUT */ TYPE_QUAL,
3480 /* RID_BYCOPY */ TYPE_QUAL,
3481 /* RID_BYREF */ TYPE_QUAL,
3482 /* RID_ONEWAY */ TYPE_QUAL,
3484 /* C */
3485 /* RID_INT */ TYPESPEC,
3486 /* RID_CHAR */ TYPESPEC,
3487 /* RID_FLOAT */ TYPESPEC,
3488 /* RID_DOUBLE */ TYPESPEC,
3489 /* RID_VOID */ TYPESPEC,
3490 /* RID_ENUM */ ENUM,
3491 /* RID_STRUCT */ STRUCT,
3492 /* RID_UNION */ UNION,
3493 /* RID_IF */ IF,
3494 /* RID_ELSE */ ELSE,
3495 /* RID_WHILE */ WHILE,
3496 /* RID_DO */ DO,
3497 /* RID_FOR */ FOR,
3498 /* RID_SWITCH */ SWITCH,
3499 /* RID_CASE */ CASE,
3500 /* RID_DEFAULT */ DEFAULT,
3501 /* RID_BREAK */ BREAK,
3502 /* RID_CONTINUE */ CONTINUE,
3503 /* RID_RETURN */ RETURN,
3504 /* RID_GOTO */ GOTO,
3505 /* RID_SIZEOF */ SIZEOF,
3507 /* C extensions */
3508 /* RID_ASM */ ASM_KEYWORD,
3509 /* RID_TYPEOF */ TYPEOF,
3510 /* RID_ALIGNOF */ ALIGNOF,
3511 /* RID_ATTRIBUTE */ ATTRIBUTE,
3512 /* RID_VA_ARG */ VA_ARG,
3513 /* RID_EXTENSION */ EXTENSION,
3514 /* RID_IMAGPART */ IMAGPART,
3515 /* RID_REALPART */ REALPART,
3516 /* RID_LABEL */ LABEL,
3517 /* RID_PTRBASE */ PTR_BASE,
3518 /* RID_PTREXTENT */ PTR_EXTENT,
3519 /* RID_PTRVALUE */ PTR_VALUE,
3521 /* RID_FUNCTION_NAME */ STRING_FUNC_NAME,
3522 /* RID_PRETTY_FUNCTION_NAME */ STRING_FUNC_NAME,
3523 /* RID_C99_FUNCTION_NAME */ VAR_FUNC_NAME,
3525 /* C++ */
3526 /* RID_BOOL */ TYPESPEC,
3527 /* RID_WCHAR */ 0,
3528 /* RID_CLASS */ 0,
3529 /* RID_PUBLIC */ 0,
3530 /* RID_PRIVATE */ 0,
3531 /* RID_PROTECTED */ 0,
3532 /* RID_TEMPLATE */ 0,
3533 /* RID_NULL */ 0,
3534 /* RID_CATCH */ 0,
3535 /* RID_DELETE */ 0,
3536 /* RID_FALSE */ 0,
3537 /* RID_NAMESPACE */ 0,
3538 /* RID_NEW */ 0,
3539 /* RID_OPERATOR */ 0,
3540 /* RID_THIS */ 0,
3541 /* RID_THROW */ 0,
3542 /* RID_TRUE */ 0,
3543 /* RID_TRY */ 0,
3544 /* RID_TYPENAME */ 0,
3545 /* RID_TYPEID */ 0,
3546 /* RID_USING */ 0,
3548 /* casts */
3549 /* RID_CONSTCAST */ 0,
3550 /* RID_DYNCAST */ 0,
3551 /* RID_REINTCAST */ 0,
3552 /* RID_STATCAST */ 0,
3554 /* alternate spellings */
3555 /* RID_AND */ 0,
3556 /* RID_AND_EQ */ 0,
3557 /* RID_NOT */ 0,
3558 /* RID_NOT_EQ */ 0,
3559 /* RID_OR */ 0,
3560 /* RID_OR_EQ */ 0,
3561 /* RID_XOR */ 0,
3562 /* RID_XOR_EQ */ 0,
3563 /* RID_BITAND */ 0,
3564 /* RID_BITOR */ 0,
3565 /* RID_COMPL */ 0,
3567 /* Objective C */
3568 /* RID_ID */ OBJECTNAME,
3569 /* RID_AT_ENCODE */ ENCODE,
3570 /* RID_AT_END */ END,
3571 /* RID_AT_CLASS */ CLASS,
3572 /* RID_AT_ALIAS */ ALIAS,
3573 /* RID_AT_DEFS */ DEFS,
3574 /* RID_AT_PRIVATE */ PRIVATE,
3575 /* RID_AT_PROTECTED */ PROTECTED,
3576 /* RID_AT_PUBLIC */ PUBLIC,
3577 /* RID_AT_PROTOCOL */ PROTOCOL,
3578 /* RID_AT_SELECTOR */ SELECTOR,
3579 /* RID_AT_INTERFACE */ INTERFACE,
3580 /* RID_AT_IMPLEMENTATION */ IMPLEMENTATION
3581 };
3583 ifobjc
3584 /* Lookup table for ObjC keywords beginning with '@'. Crude but
3585 hopefully effective. */
3586 #define N_at_reswords ((int) RID_AT_IMPLEMENTATION - (int)RID_AT_ENCODE + 1)
3587 static tree objc_rid_sans_at[N_at_reswords];
3588 end ifobjc
3590 static void
3591 init_reswords ()
3592 {
3593 unsigned int i;
3594 tree id;
3595 int mask = ((doing_objc_thang ? 0 : D_OBJC)
3596 | (flag_isoc99 ? 0 : D_C89)
3597 | (flag_traditional ? D_TRAD : 0)
3598 | (flag_no_asm ? (flag_isoc99 ? D_EXT : D_EXT|D_EXT89) : 0));
3600 /* It is not necessary to register ridpointers as a GC root, because
3601 all the trees it points to are permanently interned in the
3602 get_identifier hash anyway. */
3603 ridpointers = (tree *) xcalloc ((int) RID_MAX, sizeof (tree));
3604 for (i = 0; i < N_reswords; i++)
3605 {
3606 /* If a keyword is disabled, do not enter it into the table
3607 and so create a canonical spelling that isn't a keyword. */
3608 if (reswords[i].disable & mask)
3609 continue;
3611 id = get_identifier (reswords[i].word);
3612 C_RID_CODE (id) = reswords[i].rid;
3613 C_IS_RESERVED_WORD (id) = 1;
3614 ridpointers [(int) reswords[i].rid] = id;
3616 ifobjc
3617 /* Enter ObjC @-prefixed keywords into the "sans" table
3618 _without_ their leading at-sign. Again, all these
3619 identifiers are reachable by the get_identifer table, so it's
3620 not necessary to make objc_rid_sans_at a GC root. */
3621 if (reswords[i].word[0] == '@')
3622 objc_rid_sans_at[(int) reswords[i].rid - (int) RID_AT_ENCODE]
3623 = get_identifier (reswords[i].word + 1);
3624 end ifobjc
3625 }
3626 ifobjc
3627 save_and_forget_protocol_qualifiers ();
3628 end ifobjc
3629 }
3631 const char *
3632 init_parse (filename)
3633 const char *filename;
3634 {
3635 add_c_tree_codes ();
3637 /* Make identifier nodes long enough for the language-specific slots. */
3638 set_identifier_size (sizeof (struct lang_identifier));
3640 init_reswords ();
3641 init_pragma ();
3643 return init_c_lex (filename);
3644 }
3646 void
3647 finish_parse ()
3648 {
3649 cpp_finish (parse_in);
3650 /* Call to cpp_destroy () omitted for performance reasons. */
3651 errorcount += cpp_errors (parse_in);
3652 }
3654 #define NAME(type) cpp_type2name (type)
3656 static void
3657 yyerror (msgid)
3658 const char *msgid;
3659 {
3660 const char *string = _(msgid);
3662 if (last_token == CPP_EOF)
3663 error ("%s at end of input", string);
3664 else if (last_token == CPP_CHAR || last_token == CPP_WCHAR)
3665 {
3666 unsigned int val = TREE_INT_CST_LOW (yylval.ttype);
3667 const char *ell = (last_token == CPP_CHAR) ? "" : "L";
3668 if (val <= UCHAR_MAX && ISGRAPH (val))
3669 error ("%s before %s'%c'", string, ell, val);
3670 else
3671 error ("%s before %s'\\x%x'", string, ell, val);
3672 }
3673 else if (last_token == CPP_STRING
3674 || last_token == CPP_WSTRING)
3675 error ("%s before string constant", string);
3676 else if (last_token == CPP_NUMBER
3677 || last_token == CPP_INT
3678 || last_token == CPP_FLOAT)
3679 error ("%s before numeric constant", string);
3680 else if (last_token == CPP_NAME)
3681 error ("%s before \"%s\"", string, IDENTIFIER_POINTER (yylval.ttype));
3682 else
3683 error ("%s before '%s' token", string, NAME(last_token));
3684 }
3686 static int
3687 yylexname ()
3688 {
3689 tree decl;
3691 if (C_IS_RESERVED_WORD (yylval.ttype))
3692 {
3693 enum rid rid_code = C_RID_CODE (yylval.ttype);
3694 int yycode = rid_to_yy[(int) rid_code];
3696 if (yycode == STRING_FUNC_NAME)
3697 {
3698 /* __FUNCTION__ and __PRETTY_FUNCTION__ get converted
3699 to string constants. */
3700 const char *name = fname_string (rid_code);
3702 yylval.ttype = build_string (strlen (name) + 1, name);
3703 last_token = CPP_STRING; /* so yyerror won't choke */
3704 return STRING;
3705 }
3707 /* Return the canonical spelling for this keyword. */
3708 yylval.ttype = ridpointers[(int) rid_code];
3709 return yycode;
3710 }
3712 decl = lookup_name (yylval.ttype);
3713 if (decl)
3714 {
3715 if (TREE_CODE (decl) == TYPE_DECL)
3716 return TYPENAME;
3717 }
3718 else if (doing_objc_thang)
3719 {
3720 tree objc_interface_decl = is_class_name (yylval.ttype);
3722 if (objc_interface_decl)
3723 {
3724 yylval.ttype = objc_interface_decl;
3725 return CLASSNAME;
3726 }
3727 }
3729 return IDENTIFIER;
3730 }
3733 static inline int
3734 _yylex ()
3735 {
3736 get_next:
3737 last_token = c_lex (&yylval.ttype);
3738 ifobjc
3739 reconsider:
3740 end ifobjc
3741 switch (last_token)
3742 {
3743 case CPP_EQ: return '=';
3744 case CPP_NOT: return '!';
3745 case CPP_GREATER: yylval.code = GT_EXPR; return ARITHCOMPARE;
3746 case CPP_LESS: yylval.code = LT_EXPR; return ARITHCOMPARE;
3747 case CPP_PLUS: yylval.code = PLUS_EXPR; return '+';
3748 case CPP_MINUS: yylval.code = MINUS_EXPR; return '-';
3749 case CPP_MULT: yylval.code = MULT_EXPR; return '*';
3750 case CPP_DIV: yylval.code = TRUNC_DIV_EXPR; return '/';
3751 case CPP_MOD: yylval.code = TRUNC_MOD_EXPR; return '%';
3752 case CPP_AND: yylval.code = BIT_AND_EXPR; return '&';
3753 case CPP_OR: yylval.code = BIT_IOR_EXPR; return '|';
3754 case CPP_XOR: yylval.code = BIT_XOR_EXPR; return '^';
3755 case CPP_RSHIFT: yylval.code = RSHIFT_EXPR; return RSHIFT;
3756 case CPP_LSHIFT: yylval.code = LSHIFT_EXPR; return LSHIFT;
3758 case CPP_COMPL: return '~';
3759 case CPP_AND_AND: return ANDAND;
3760 case CPP_OR_OR: return OROR;
3761 case CPP_QUERY: return '?';
3762 case CPP_COLON: return ':';
3763 case CPP_COMMA: return ',';
3764 case CPP_OPEN_PAREN: return '(';
3765 case CPP_CLOSE_PAREN: return ')';
3766 case CPP_EQ_EQ: yylval.code = EQ_EXPR; return EQCOMPARE;
3767 case CPP_NOT_EQ: yylval.code = NE_EXPR; return EQCOMPARE;
3768 case CPP_GREATER_EQ:yylval.code = GE_EXPR; return ARITHCOMPARE;
3769 case CPP_LESS_EQ: yylval.code = LE_EXPR; return ARITHCOMPARE;
3771 case CPP_PLUS_EQ: yylval.code = PLUS_EXPR; return ASSIGN;
3772 case CPP_MINUS_EQ: yylval.code = MINUS_EXPR; return ASSIGN;
3773 case CPP_MULT_EQ: yylval.code = MULT_EXPR; return ASSIGN;
3774 case CPP_DIV_EQ: yylval.code = TRUNC_DIV_EXPR; return ASSIGN;
3775 case CPP_MOD_EQ: yylval.code = TRUNC_MOD_EXPR; return ASSIGN;
3776 case CPP_AND_EQ: yylval.code = BIT_AND_EXPR; return ASSIGN;
3777 case CPP_OR_EQ: yylval.code = BIT_IOR_EXPR; return ASSIGN;
3778 case CPP_XOR_EQ: yylval.code = BIT_XOR_EXPR; return ASSIGN;
3779 case CPP_RSHIFT_EQ: yylval.code = RSHIFT_EXPR; return ASSIGN;
3780 case CPP_LSHIFT_EQ: yylval.code = LSHIFT_EXPR; return ASSIGN;
3782 case CPP_OPEN_SQUARE: return '[';
3783 case CPP_CLOSE_SQUARE: return ']';
3784 case CPP_OPEN_BRACE: return '{';
3785 case CPP_CLOSE_BRACE: return '}';
3786 case CPP_SEMICOLON: return ';';
3787 case CPP_ELLIPSIS: return ELLIPSIS;
3789 case CPP_PLUS_PLUS: return PLUSPLUS;
3790 case CPP_MINUS_MINUS: return MINUSMINUS;
3791 case CPP_DEREF: return POINTSAT;
3792 case CPP_DOT: return '.';
3794 case CPP_EOF:
3795 if (cpp_pop_buffer (parse_in) == 0)
3796 return 0;
3797 goto get_next;
3799 case CPP_NAME:
3800 return yylexname ();
3802 case CPP_INT:
3803 case CPP_FLOAT:
3804 case CPP_NUMBER:
3805 case CPP_CHAR:
3806 case CPP_WCHAR:
3807 return CONSTANT;
3809 case CPP_STRING:
3810 case CPP_WSTRING:
3811 return STRING;
3813 /* This token is Objective-C specific. It gives the next
3814 token special significance. */
3815 case CPP_ATSIGN:
3816 ifobjc
3817 last_token = c_lex (&yylval.ttype);
3818 if (last_token == CPP_STRING)
3819 return OBJC_STRING;
3820 else if (last_token == CPP_NAME)
3821 {
3822 int i;
3823 for (i = 0; i < N_at_reswords; i++)
3824 if (objc_rid_sans_at[i] == yylval.ttype)
3825 {
3826 int rid_code = i + (int) RID_AT_ENCODE;
3827 yylval.ttype = ridpointers[rid_code];
3828 return rid_to_yy[rid_code];
3829 }
3830 }
3831 error ("syntax error at '@' token");
3832 goto reconsider;
3833 end ifobjc
3834 /* These tokens are C++ specific (and will not be generated
3835 in C mode, but let's be cautious). */
3836 case CPP_SCOPE:
3837 case CPP_DEREF_STAR:
3838 case CPP_DOT_STAR:
3839 case CPP_MIN_EQ:
3840 case CPP_MAX_EQ:
3841 case CPP_MIN:
3842 case CPP_MAX:
3843 /* These tokens should not survive translation phase 4. */
3844 case CPP_HASH:
3845 case CPP_PASTE:
3846 error ("syntax error at '%s' token", NAME(last_token));
3847 goto get_next;
3849 default:
3850 abort ();
3851 }
3852 /* NOTREACHED */
3853 }
3855 static int
3856 yylex()
3857 {
3858 int r;
3859 timevar_push (TV_LEX);
3860 r = _yylex();
3861 timevar_pop (TV_LEX);
3862 return r;
3863 }
3865 /* Sets the value of the 'yydebug' variable to VALUE.
3866 This is a function so we don't have to have YYDEBUG defined
3867 in order to build the compiler. */
3869 void
3870 set_yydebug (value)
3871 int value;
3872 {
3873 #if YYDEBUG != 0
3874 yydebug = value;
3875 #else
3876 warning ("YYDEBUG not defined.");
3877 #endif
3878 }
3880 /* Function used when yydebug is set, to print a token in more detail. */
3882 static void
3883 yyprint (file, yychar, yyl)
3884 FILE *file;
3885 int yychar;
3886 YYSTYPE yyl;
3887 {
3888 tree t = yyl.ttype;
3890 fprintf (file, " [%s]", NAME(last_token));
3892 switch (yychar)
3893 {
3894 case IDENTIFIER:
3895 case TYPENAME:
3896 case OBJECTNAME:
3897 case TYPESPEC:
3898 case TYPE_QUAL:
3899 case SCSPEC:
3900 if (IDENTIFIER_POINTER (t))
3901 fprintf (file, " `%s'", IDENTIFIER_POINTER (t));
3902 break;
3904 case CONSTANT:
3905 fprintf (file, " %s", GET_MODE_NAME (TYPE_MODE (TREE_TYPE (t))));
3906 if (TREE_CODE (t) == INTEGER_CST)
3907 fprintf (file,
3908 #if HOST_BITS_PER_WIDE_INT == 64
3909 #if HOST_BITS_PER_WIDE_INT == HOST_BITS_PER_INT
3910 " 0x%x%016x",
3911 #else
3912 #if HOST_BITS_PER_WIDE_INT == HOST_BITS_PER_LONG
3913 " 0x%lx%016lx",
3914 #else
3915 " 0x%llx%016llx",
3916 #endif
3917 #endif
3918 #else
3919 #if HOST_BITS_PER_WIDE_INT != HOST_BITS_PER_INT
3920 " 0x%lx%08lx",
3921 #else
3922 " 0x%x%08x",
3923 #endif
3924 #endif
3925 TREE_INT_CST_HIGH (t), TREE_INT_CST_LOW (t));
3926 break;
3927 }
3928 }
3929 \f
3930 /* This is not the ideal place to put these, but we have to get them out
3931 of c-lex.c because cp/lex.c has its own versions. */
3933 /* Return something to represent absolute declarators containing a *.
3934 TARGET is the absolute declarator that the * contains.
3935 TYPE_QUALS is a list of modifiers such as const or volatile
3936 to apply to the pointer type, represented as identifiers.
3938 We return an INDIRECT_REF whose "contents" are TARGET
3939 and whose type is the modifier list. */
3941 tree
3942 make_pointer_declarator (type_quals, target)
3943 tree type_quals, target;
3944 {
3945 return build1 (INDIRECT_REF, type_quals, target);
3946 }