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 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)
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. */
51 #ifdef MULTIBYTE_CHARS
59 /* Since parsers are distinct for each language, put the language string
62 const char * const language_string = "GNU Objective-C";
65 const char * const language_string = "GNU C";
68 /* Like YYERROR but do call yyerror. */
69 #define YYERROR1 { yyerror ("syntax error"); YYERROR; }
71 /* Cause the `yydebug' variable to be defined. */
77 %union {long itype; tree ttype; enum tree_code code;
78 const char *filename; int lineno; int ends_in_label; }
80 /* All identifiers that are not reserved words
81 and are not declared typedefs in the current block */
84 /* All identifiers that are declared typedefs in the current block.
85 In some contexts, they are treated just like IDENTIFIER,
86 but they can also serve as typespecs in declarations. */
89 /* Reserved words that specify storage class.
90 yylval contains an IDENTIFIER_NODE which indicates which one. */
93 /* Reserved words that specify type.
94 yylval contains an IDENTIFIER_NODE which indicates which one. */
97 /* Reserved words that qualify type: "const", "volatile", or "restrict".
98 yylval contains an IDENTIFIER_NODE which indicates which one. */
101 /* Character or numeric constants.
102 yylval is the node for the constant. */
105 /* String constants in raw form.
106 yylval is a STRING_CST node. */
109 /* "...", used for functions with variable arglists. */
112 /* the reserved words */
113 /* SCO include files test "ASM", so use something else. */
114 %token SIZEOF ENUM STRUCT UNION IF ELSE WHILE DO FOR SWITCH CASE DEFAULT
115 %token BREAK CONTINUE RETURN GOTO ASM_KEYWORD TYPEOF ALIGNOF
116 %token ATTRIBUTE EXTENSION LABEL
117 %token REALPART IMAGPART VA_ARG
118 %token PTR_VALUE PTR_BASE PTR_EXTENT
120 /* Used in c-lex.c for parsing pragmas. */
123 /* Add precedence rules to solve dangling else s/r conflict */
127 /* Define the operator tokens and their precedences.
128 The value is an integer because, if used, it is the tree code
129 to use in the expression made from the operator. */
131 %right <code> ASSIGN '='
132 %right <code> '?' ':'
138 %left <code> EQCOMPARE
139 %left <code> ARITHCOMPARE
140 %left <code> LSHIFT RSHIFT
142 %left <code> '*' '/' '%'
143 %right <code> UNARY PLUSPLUS MINUSMINUS
145 %left <code> POINTSAT '.' '(' '['
147 /* The Objective-C keywords. These are included in C and in
148 Objective C, so that the token codes are the same in both. */
149 %token INTERFACE IMPLEMENTATION END SELECTOR DEFS ENCODE
150 %token CLASSNAME PUBLIC PRIVATE PROTECTED PROTOCOL OBJECTNAME CLASS ALIAS
152 /* Objective-C string constants in raw form.
153 yylval is an STRING_CST node. */
159 %type <ttype> identifier IDENTIFIER TYPENAME CONSTANT expr nonnull_exprlist exprlist
160 %type <ttype> expr_no_commas cast_expr unary_expr primary string STRING
161 %type <ttype> typed_declspecs reserved_declspecs
162 %type <ttype> typed_typespecs reserved_typespecquals
163 %type <ttype> declmods typespec typespecqual_reserved
164 %type <ttype> typed_declspecs_no_prefix_attr reserved_declspecs_no_prefix_attr
165 %type <ttype> declmods_no_prefix_attr
166 %type <ttype> SCSPEC TYPESPEC TYPE_QUAL nonempty_type_quals maybe_type_qual
167 %type <ttype> initdecls notype_initdecls initdcl notype_initdcl
168 %type <ttype> init maybeasm
169 %type <ttype> asm_operands nonnull_asm_operands asm_operand asm_clobbers
170 %type <ttype> maybe_attribute attributes attribute attribute_list attrib
171 %type <ttype> any_word extension
173 %type <ttype> compstmt compstmt_nostart compstmt_primary_start
175 %type <ttype> declarator
176 %type <ttype> notype_declarator after_type_declarator
177 %type <ttype> parm_declarator
179 %type <ttype> structsp component_decl_list component_decl_list2
180 %type <ttype> component_decl components component_declarator
181 %type <ttype> enumlist enumerator
182 %type <ttype> struct_head union_head enum_head
183 %type <ttype> typename absdcl absdcl1 type_quals
184 %type <ttype> xexpr parms parm identifiers
186 %type <ttype> parmlist parmlist_1 parmlist_2
187 %type <ttype> parmlist_or_identifiers parmlist_or_identifiers_1
188 %type <ttype> identifiers_or_typenames
190 %type <itype> setspecs
192 %type <ends_in_label> lineno_stmt_or_label lineno_stmt_or_labels stmt_or_label
194 %type <filename> save_filename
195 %type <lineno> save_lineno
198 /* the Objective-C nonterminals */
200 %type <ttype> ivar_decl_list ivar_decls ivar_decl ivars ivar_declarator
201 %type <ttype> methoddecl unaryselector keywordselector selector
202 %type <ttype> keyworddecl receiver objcmessageexpr messageargs
203 %type <ttype> keywordexpr keywordarglist keywordarg
204 %type <ttype> myparms myparm optparmlist reservedwords objcselectorexpr
205 %type <ttype> selectorarg keywordnamelist keywordname objcencodeexpr
206 %type <ttype> objc_string non_empty_protocolrefs protocolrefs identifier_list objcprotocolexpr
208 %type <ttype> CLASSNAME OBJC_STRING OBJECTNAME
212 /* Number of statements (loosely speaking) and compound statements
214 static int stmt_count;
215 static int compstmt_count;
217 /* Input file and line number of the end of the body of last simple_if;
218 used by the stmt-rule immediately after simple_if returns. */
219 static const char *if_stmt_file;
220 static int if_stmt_line;
222 /* List of types and structure classes of the current declaration. */
223 static tree current_declspecs = NULL_TREE;
224 static tree prefix_attributes = NULL_TREE;
226 /* Stack of saved values of current_declspecs and prefix_attributes. */
227 static tree declspec_stack;
229 /* For __extension__, save/restore the warning flags which are
230 controlled by __extension__. */
231 #define SAVE_WARN_FLAGS() \
232 size_int (pedantic | (warn_pointer_arith << 1))
233 #define RESTORE_WARN_FLAGS(tval) \
235 int val = tree_low_cst (tval, 0); \
236 pedantic = val & 1; \
237 warn_pointer_arith = (val >> 1) & 1; \
241 /* Objective-C specific information */
243 tree objc_interface_context;
244 tree objc_implementation_context;
245 tree objc_method_context;
246 tree objc_ivar_chain;
247 tree objc_ivar_context;
248 enum tree_code objc_inherit_code;
249 int objc_receiver_context;
250 int objc_public_flag;
254 /* Tell yyparse how to print a token's value, if yydebug is set. */
256 #define YYPRINT(FILE,YYCHAR,YYLVAL) yyprint(FILE,YYCHAR,YYLVAL)
257 extern void yyprint PARAMS ((FILE *, int, YYSTYPE));
259 /* Add GC roots for variables local to this file. */
263 ggc_add_tree_root (&declspec_stack, 1);
264 ggc_add_tree_root (¤t_declspecs, 1);
265 ggc_add_tree_root (&prefix_attributes, 1);
267 ggc_add_tree_root (&objc_interface_context, 1);
268 ggc_add_tree_root (&objc_implementation_context, 1);
269 ggc_add_tree_root (&objc_method_context, 1);
270 ggc_add_tree_root (&objc_ivar_chain, 1);
271 ggc_add_tree_root (&objc_ivar_context, 1);
280 pedwarn ("ISO C forbids an empty source file");
285 /* In case there were missing closebraces,
286 get us back to the global binding level. */
287 while (! global_bindings_p ())
293 /* the reason for the strange actions in this rule
294 is so that notype_initdecls when reached via datadef
295 can find a valid list of type and sc specs in $0. */
298 {$<ttype>$ = NULL_TREE; } extdef
299 | extdefs {$<ttype>$ = NULL_TREE; ggc_collect(); } extdef
308 | ASM_KEYWORD '(' expr ')' ';'
310 if ((TREE_CODE ($3) == ADDR_EXPR
311 && TREE_CODE (TREE_OPERAND ($3, 0)) == STRING_CST)
312 || TREE_CODE ($3) == STRING_CST)
315 error ("argument of `asm' is not a constant string"); }
317 { RESTORE_WARN_FLAGS ($1); }
321 setspecs notype_initdecls ';'
323 error ("ISO C forbids data definition with no type or storage class");
324 else if (!flag_traditional)
325 warning ("data definition has no type or storage class");
327 current_declspecs = TREE_VALUE (declspec_stack);
328 prefix_attributes = TREE_PURPOSE (declspec_stack);
329 declspec_stack = TREE_CHAIN (declspec_stack); }
330 | declmods setspecs notype_initdecls ';'
331 { current_declspecs = TREE_VALUE (declspec_stack);
332 prefix_attributes = TREE_PURPOSE (declspec_stack);
333 declspec_stack = TREE_CHAIN (declspec_stack); }
334 | typed_declspecs setspecs initdecls ';'
335 { current_declspecs = TREE_VALUE (declspec_stack);
336 prefix_attributes = TREE_PURPOSE (declspec_stack);
337 declspec_stack = TREE_CHAIN (declspec_stack); }
339 { pedwarn ("empty declaration"); }
340 | typed_declspecs ';'
346 pedwarn ("ISO C does not allow extra `;' outside of a function"); }
350 typed_declspecs setspecs declarator
351 { if (! start_function (current_declspecs, $3,
352 prefix_attributes, NULL_TREE))
354 reinit_parse_for_function (); }
356 { store_parm_decls (); }
358 { finish_function (0);
359 current_declspecs = TREE_VALUE (declspec_stack);
360 prefix_attributes = TREE_PURPOSE (declspec_stack);
361 declspec_stack = TREE_CHAIN (declspec_stack); }
362 | typed_declspecs setspecs declarator error
363 { current_declspecs = TREE_VALUE (declspec_stack);
364 prefix_attributes = TREE_PURPOSE (declspec_stack);
365 declspec_stack = TREE_CHAIN (declspec_stack); }
366 | declmods setspecs notype_declarator
367 { if (! start_function (current_declspecs, $3,
368 prefix_attributes, NULL_TREE))
370 reinit_parse_for_function (); }
372 { store_parm_decls (); }
374 { finish_function (0);
375 current_declspecs = TREE_VALUE (declspec_stack);
376 prefix_attributes = TREE_PURPOSE (declspec_stack);
377 declspec_stack = TREE_CHAIN (declspec_stack); }
378 | declmods setspecs notype_declarator error
379 { current_declspecs = TREE_VALUE (declspec_stack);
380 prefix_attributes = TREE_PURPOSE (declspec_stack);
381 declspec_stack = TREE_CHAIN (declspec_stack); }
382 | setspecs notype_declarator
383 { if (! start_function (NULL_TREE, $2,
384 prefix_attributes, NULL_TREE))
386 reinit_parse_for_function (); }
388 { store_parm_decls (); }
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 | setspecs notype_declarator error
395 { current_declspecs = TREE_VALUE (declspec_stack);
396 prefix_attributes = TREE_PURPOSE (declspec_stack);
397 declspec_stack = TREE_CHAIN (declspec_stack); }
412 { $$ = NEGATE_EXPR; }
416 if (warn_traditional)
417 warning ("traditional C rejects the unary plus operator");
421 { $$ = PREINCREMENT_EXPR; }
423 { $$ = PREDECREMENT_EXPR; }
425 { $$ = BIT_NOT_EXPR; }
427 { $$ = TRUTH_NOT_EXPR; }
430 expr: nonnull_exprlist
431 { $$ = build_compound_expr ($1); }
442 { $$ = build_tree_list (NULL_TREE, $1); }
443 | nonnull_exprlist ',' expr_no_commas
444 { chainon ($1, build_tree_list (NULL_TREE, $3)); }
449 | '*' cast_expr %prec UNARY
450 { $$ = build_indirect_ref ($2, "unary *"); }
451 /* __extension__ turns off -pedantic for following primary. */
452 | extension cast_expr %prec UNARY
454 RESTORE_WARN_FLAGS ($1); }
455 | unop cast_expr %prec UNARY
456 { $$ = build_unary_op ($1, $2, 0);
457 overflow_warning ($$); }
458 /* Refer to the address of a label as a pointer. */
460 { tree label = lookup_label ($2);
462 pedwarn ("ISO C forbids `&&'");
464 $$ = null_pointer_node;
467 TREE_USED (label) = 1;
468 $$ = build1 (ADDR_EXPR, ptr_type_node, label);
469 TREE_CONSTANT ($$) = 1;
472 /* This seems to be impossible on some machines, so let's turn it off.
473 You can use __builtin_next_arg to find the anonymous stack args.
475 { tree types = TYPE_ARG_TYPES (TREE_TYPE (current_function_decl));
476 $$ = error_mark_node;
477 if (TREE_VALUE (tree_last (types)) == void_type_node)
478 error ("`&...' used in function with fixed number of arguments");
482 pedwarn ("ISO C forbids `&...'");
483 $$ = tree_last (DECL_ARGUMENTS (current_function_decl));
484 $$ = build_unary_op (ADDR_EXPR, $$, 0);
487 | sizeof unary_expr %prec UNARY
489 if (TREE_CODE ($2) == COMPONENT_REF
490 && DECL_C_BIT_FIELD (TREE_OPERAND ($2, 1)))
491 error ("`sizeof' applied to a bit-field");
492 $$ = c_sizeof (TREE_TYPE ($2)); }
493 | sizeof '(' typename ')' %prec HYPERUNARY
495 $$ = c_sizeof (groktypename ($3)); }
496 | alignof unary_expr %prec UNARY
498 $$ = c_alignof_expr ($2); }
499 | alignof '(' typename ')' %prec HYPERUNARY
501 $$ = c_alignof (groktypename ($3)); }
502 | REALPART cast_expr %prec UNARY
503 { $$ = build_unary_op (REALPART_EXPR, $2, 0); }
504 | IMAGPART cast_expr %prec UNARY
505 { $$ = build_unary_op (IMAGPART_EXPR, $2, 0); }
506 | VA_ARG '(' expr_no_commas ',' typename ')'
507 { $$ = build_va_arg ($3, groktypename ($5)); }
511 SIZEOF { skip_evaluation++; }
515 ALIGNOF { skip_evaluation++; }
520 | '(' typename ')' cast_expr %prec UNARY
522 int SAVED_warn_strict_prototypes = warn_strict_prototypes;
523 /* This avoids warnings about unprototyped casts on
524 integers. E.g. "#define SIG_DFL (void(*)())0". */
525 if (TREE_CODE ($4) == INTEGER_CST)
526 warn_strict_prototypes = 0;
527 type = groktypename ($2);
528 warn_strict_prototypes = SAVED_warn_strict_prototypes;
529 $$ = build_c_cast (type, $4); }
530 | '(' typename ')' '{'
531 { start_init (NULL_TREE, NULL, 0);
532 $2 = groktypename ($2);
533 really_start_incremental_init ($2); }
534 initlist_maybe_comma '}' %prec UNARY
536 tree result = pop_init_level (0);
540 if (pedantic && ! flag_isoc99)
541 pedwarn ("ISO C89 forbids constructor expressions");
542 if (TYPE_NAME (type) != 0)
544 if (TREE_CODE (TYPE_NAME (type)) == IDENTIFIER_NODE)
545 name = IDENTIFIER_POINTER (TYPE_NAME (type));
547 name = IDENTIFIER_POINTER (DECL_NAME (TYPE_NAME (type)));
552 if (TREE_CODE (type) == ARRAY_TYPE && !COMPLETE_TYPE_P (type))
554 int failure = complete_array_type (type, $$, 1);
563 | expr_no_commas '+' expr_no_commas
564 { $$ = parser_build_binary_op ($2, $1, $3); }
565 | expr_no_commas '-' expr_no_commas
566 { $$ = parser_build_binary_op ($2, $1, $3); }
567 | expr_no_commas '*' 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 { $$ = parser_build_binary_op ($2, $1, $3); }
573 | expr_no_commas LSHIFT expr_no_commas
574 { $$ = parser_build_binary_op ($2, $1, $3); }
575 | expr_no_commas RSHIFT expr_no_commas
576 { $$ = parser_build_binary_op ($2, $1, $3); }
577 | expr_no_commas ARITHCOMPARE expr_no_commas
578 { $$ = parser_build_binary_op ($2, $1, $3); }
579 | expr_no_commas EQCOMPARE expr_no_commas
580 { $$ = parser_build_binary_op ($2, $1, $3); }
581 | expr_no_commas '&' expr_no_commas
582 { $$ = parser_build_binary_op ($2, $1, $3); }
583 | expr_no_commas '|' expr_no_commas
584 { $$ = parser_build_binary_op ($2, $1, $3); }
585 | expr_no_commas '^' expr_no_commas
586 { $$ = parser_build_binary_op ($2, $1, $3); }
587 | expr_no_commas ANDAND
588 { $1 = truthvalue_conversion (default_conversion ($1));
589 skip_evaluation += $1 == boolean_false_node; }
591 { skip_evaluation -= $1 == boolean_false_node;
592 $$ = parser_build_binary_op (TRUTH_ANDIF_EXPR, $1, $4); }
593 | expr_no_commas OROR
594 { $1 = truthvalue_conversion (default_conversion ($1));
595 skip_evaluation += $1 == boolean_true_node; }
597 { skip_evaluation -= $1 == boolean_true_node;
598 $$ = parser_build_binary_op (TRUTH_ORIF_EXPR, $1, $4); }
600 { $1 = truthvalue_conversion (default_conversion ($1));
601 skip_evaluation += $1 == boolean_false_node; }
603 { skip_evaluation += (($1 == boolean_true_node)
604 - ($1 == boolean_false_node)); }
606 { skip_evaluation -= $1 == boolean_true_node;
607 $$ = build_conditional_expr ($1, $4, $7); }
610 pedwarn ("ISO C forbids omitting the middle term of a ?: expression");
611 /* Make sure first operand is calculated only once. */
612 $<ttype>2 = save_expr ($1);
613 $1 = truthvalue_conversion (default_conversion ($<ttype>2));
614 skip_evaluation += $1 == boolean_true_node; }
616 { skip_evaluation -= $1 == boolean_true_node;
617 $$ = build_conditional_expr ($1, $<ttype>2, $5); }
618 | expr_no_commas '=' expr_no_commas
620 $$ = build_modify_expr ($1, NOP_EXPR, $3);
621 class = TREE_CODE_CLASS (TREE_CODE ($$));
622 if (class == 'e' || class == '1'
623 || class == '2' || class == '<')
624 C_SET_EXP_ORIGINAL_CODE ($$, MODIFY_EXPR);
626 | expr_no_commas ASSIGN expr_no_commas
628 $$ = build_modify_expr ($1, $2, $3);
629 /* This inhibits warnings in truthvalue_conversion. */
630 class = TREE_CODE_CLASS (TREE_CODE ($$));
631 if (class == 'e' || class == '1'
632 || class == '2' || class == '<')
633 C_SET_EXP_ORIGINAL_CODE ($$, ERROR_MARK);
640 if (yychar == YYEMPTY)
642 $$ = build_external_ref ($1, yychar == '(');
646 { $$ = combine_strings ($1); }
648 { char class = TREE_CODE_CLASS (TREE_CODE ($2));
649 if (class == 'e' || class == '1'
650 || class == '2' || class == '<')
651 C_SET_EXP_ORIGINAL_CODE ($2, ERROR_MARK);
654 { $$ = error_mark_node; }
655 | compstmt_primary_start compstmt_nostart ')'
658 pedwarn ("ISO C forbids braced-groups within expressions");
659 pop_iterator_stack ();
661 rtl_exp = expand_end_stmt_expr ($1);
662 /* The statements have side effects, so the group does. */
663 TREE_SIDE_EFFECTS (rtl_exp) = 1;
665 if (TREE_CODE ($2) == BLOCK)
667 /* Make a BIND_EXPR for the BLOCK already made. */
668 $$ = build (BIND_EXPR, TREE_TYPE (rtl_exp),
669 NULL_TREE, rtl_exp, $2);
670 /* Remove the block from the tree at this point.
671 It gets put back at the proper place
672 when the BIND_EXPR is expanded. */
678 | compstmt_primary_start error ')'
680 /* Make sure we call expand_end_stmt_expr. Otherwise
681 we are likely to lose sequences and crash later. */
682 pop_iterator_stack ();
684 expand_end_stmt_expr ($1);
685 $$ = error_mark_node;
687 | primary '(' exprlist ')' %prec '.'
688 { $$ = build_function_call ($1, $3); }
689 | primary '[' expr ']' %prec '.'
690 { $$ = build_array_ref ($1, $3); }
691 | primary '.' identifier
694 if (doing_objc_thang)
696 if (is_public ($1, $3))
697 $$ = build_component_ref ($1, $3);
699 $$ = error_mark_node;
703 $$ = build_component_ref ($1, $3);
705 | primary POINTSAT identifier
707 tree expr = build_indirect_ref ($1, "->");
710 if (doing_objc_thang)
712 if (is_public (expr, $3))
713 $$ = build_component_ref (expr, $3);
715 $$ = error_mark_node;
719 $$ = build_component_ref (expr, $3);
722 { $$ = build_unary_op (POSTINCREMENT_EXPR, $1, 0); }
724 { $$ = build_unary_op (POSTDECREMENT_EXPR, $1, 0); }
727 { $$ = build_message_expr ($1); }
729 { $$ = build_selector_expr ($1); }
731 { $$ = build_protocol_expr ($1); }
733 { $$ = build_encode_expr ($1); }
735 { $$ = build_objc_string_object ($1); }
739 /* Produces a STRING_CST with perhaps more STRING_CSTs chained onto it. */
745 static int last_lineno = 0;
746 static const char *last_input_filename = 0;
748 $$ = chainon ($1, $2);
750 if (warn_traditional && !in_system_header
751 && (lineno != last_lineno || !last_input_filename ||
752 strcmp (last_input_filename, input_filename)))
754 warning ("traditional C rejects string concatenation");
755 last_lineno = lineno;
756 last_input_filename = input_filename;
763 /* Produces an STRING_CST with perhaps more STRING_CSTs chained
764 onto it, which is to be read as an ObjC string object. */
767 | objc_string OBJC_STRING
768 { $$ = chainon ($1, $2); }
772 old_style_parm_decls:
776 /* ... is used here to indicate a varargs function. */
779 pedwarn ("ISO C does not permit use of `varargs.h'"); }
782 /* The following are analogous to lineno_decl, decls and decl
783 except that they do not allow nested functions.
784 They are used for old-style parm decls. */
786 save_filename save_lineno datadecl
793 | datadecls lineno_datadecl
794 | lineno_datadecl errstmt
797 /* We don't allow prefix attributes here because they cause reduce/reduce
798 conflicts: we can't know whether we're parsing a function decl with
799 attribute suffix, or function defn with attribute prefix on first old
802 typed_declspecs_no_prefix_attr setspecs initdecls ';'
803 { current_declspecs = TREE_VALUE (declspec_stack);
804 prefix_attributes = TREE_PURPOSE (declspec_stack);
805 declspec_stack = TREE_CHAIN (declspec_stack); }
806 | declmods_no_prefix_attr setspecs notype_initdecls ';'
807 { current_declspecs = TREE_VALUE (declspec_stack);
808 prefix_attributes = TREE_PURPOSE (declspec_stack);
809 declspec_stack = TREE_CHAIN (declspec_stack); }
810 | typed_declspecs_no_prefix_attr ';'
811 { shadow_tag_warned ($1, 1);
812 pedwarn ("empty declaration"); }
813 | declmods_no_prefix_attr ';'
814 { pedwarn ("empty declaration"); }
817 /* This combination which saves a lineno before a decl
818 is the normal thing to use, rather than decl itself.
819 This is to avoid shift/reduce conflicts in contexts
820 where statement labels are allowed. */
822 save_filename save_lineno decl
830 | lineno_decl errstmt
833 /* records the type and storage class specs to use for processing
834 the declarators that follow.
835 Maintains a stack of outer-level values of current_declspecs,
836 for the sake of parm declarations nested in function declarators. */
837 setspecs: /* empty */
838 { pending_xref_error ();
839 declspec_stack = tree_cons (prefix_attributes,
842 split_specs_attrs ($<ttype>0,
843 ¤t_declspecs, &prefix_attributes); }
846 /* ??? Yuck. See after_type_declarator. */
847 setattrs: /* empty */
848 { prefix_attributes = chainon (prefix_attributes, $<ttype>0); }
852 typed_declspecs setspecs initdecls ';'
853 { current_declspecs = TREE_VALUE (declspec_stack);
854 prefix_attributes = TREE_PURPOSE (declspec_stack);
855 declspec_stack = TREE_CHAIN (declspec_stack); }
856 | declmods setspecs notype_initdecls ';'
857 { current_declspecs = TREE_VALUE (declspec_stack);
858 prefix_attributes = TREE_PURPOSE (declspec_stack);
859 declspec_stack = TREE_CHAIN (declspec_stack); }
860 | typed_declspecs setspecs nested_function
861 { current_declspecs = TREE_VALUE (declspec_stack);
862 prefix_attributes = TREE_PURPOSE (declspec_stack);
863 declspec_stack = TREE_CHAIN (declspec_stack); }
864 | declmods setspecs notype_nested_function
865 { current_declspecs = TREE_VALUE (declspec_stack);
866 prefix_attributes = TREE_PURPOSE (declspec_stack);
867 declspec_stack = TREE_CHAIN (declspec_stack); }
868 | typed_declspecs ';'
871 { pedwarn ("empty declaration"); }
873 { RESTORE_WARN_FLAGS ($1); }
876 /* Declspecs which contain at least one type specifier or typedef name.
877 (Just `const' or `volatile' is not enough.)
878 A typedef'd name following these is taken as a name to be declared.
879 Declspecs have a non-NULL TREE_VALUE, attributes do not. */
882 typespec reserved_declspecs
883 { $$ = tree_cons (NULL_TREE, $1, $2); }
884 | declmods typespec reserved_declspecs
885 { $$ = chainon ($3, tree_cons (NULL_TREE, $2, $1)); }
888 reserved_declspecs: /* empty */
890 | reserved_declspecs typespecqual_reserved
891 { $$ = tree_cons (NULL_TREE, $2, $1); }
892 | reserved_declspecs SCSPEC
893 { if (extra_warnings)
894 warning ("`%s' is not at beginning of declaration",
895 IDENTIFIER_POINTER ($2));
896 $$ = tree_cons (NULL_TREE, $2, $1); }
897 | reserved_declspecs attributes
898 { $$ = tree_cons ($2, NULL_TREE, $1); }
901 typed_declspecs_no_prefix_attr:
902 typespec reserved_declspecs_no_prefix_attr
903 { $$ = tree_cons (NULL_TREE, $1, $2); }
904 | declmods_no_prefix_attr typespec reserved_declspecs_no_prefix_attr
905 { $$ = chainon ($3, tree_cons (NULL_TREE, $2, $1)); }
908 reserved_declspecs_no_prefix_attr:
911 | reserved_declspecs_no_prefix_attr typespecqual_reserved
912 { $$ = tree_cons (NULL_TREE, $2, $1); }
913 | reserved_declspecs_no_prefix_attr SCSPEC
914 { if (extra_warnings)
915 warning ("`%s' is not at beginning of declaration",
916 IDENTIFIER_POINTER ($2));
917 $$ = tree_cons (NULL_TREE, $2, $1); }
920 /* List of just storage classes, type modifiers, and prefix attributes.
921 A declaration can start with just this, but then it cannot be used
922 to redeclare a typedef-name.
923 Declspecs have a non-NULL TREE_VALUE, attributes do not. */
926 declmods_no_prefix_attr
929 { $$ = tree_cons ($1, NULL_TREE, NULL_TREE); }
930 | declmods declmods_no_prefix_attr
931 { $$ = chainon ($2, $1); }
932 | declmods attributes
933 { $$ = tree_cons ($2, NULL_TREE, $1); }
936 declmods_no_prefix_attr:
938 { $$ = tree_cons (NULL_TREE, $1, NULL_TREE);
939 TREE_STATIC ($$) = 1; }
941 { $$ = tree_cons (NULL_TREE, $1, NULL_TREE); }
942 | declmods_no_prefix_attr TYPE_QUAL
943 { $$ = tree_cons (NULL_TREE, $2, $1);
944 TREE_STATIC ($$) = 1; }
945 | declmods_no_prefix_attr SCSPEC
946 { if (extra_warnings && TREE_STATIC ($1))
947 warning ("`%s' is not at beginning of declaration",
948 IDENTIFIER_POINTER ($2));
949 $$ = tree_cons (NULL_TREE, $2, $1);
950 TREE_STATIC ($$) = TREE_STATIC ($1); }
954 /* Used instead of declspecs where storage classes are not allowed
955 (that is, for typenames and structure components).
956 Don't accept a typedef-name if anything but a modifier precedes it. */
959 typespec reserved_typespecquals
960 { $$ = tree_cons (NULL_TREE, $1, $2); }
961 | nonempty_type_quals typespec reserved_typespecquals
962 { $$ = chainon ($3, tree_cons (NULL_TREE, $2, $1)); }
965 reserved_typespecquals: /* empty */
967 | reserved_typespecquals typespecqual_reserved
968 { $$ = tree_cons (NULL_TREE, $2, $1); }
971 /* A typespec (but not a type qualifier).
972 Once we have seen one of these in a declaration,
973 if a typedef name appears then it is being redeclared. */
978 { /* For a typedef name, record the meaning, not the name.
979 In case of `foo foo, bar;'. */
980 $$ = lookup_name ($1); }
982 | CLASSNAME protocolrefs
983 { $$ = get_static_reference ($1, $2); }
984 | OBJECTNAME protocolrefs
985 { $$ = get_object_reference ($2); }
987 /* Make "<SomeProtocol>" equivalent to "id <SomeProtocol>"
988 - nisse@lysator.liu.se */
989 | non_empty_protocolrefs
990 { $$ = get_object_reference ($1); }
992 | TYPEOF '(' expr ')'
993 { $$ = TREE_TYPE ($3); }
994 | TYPEOF '(' typename ')'
995 { $$ = groktypename ($3); }
998 /* A typespec that is a reserved word, or a type qualifier. */
1000 typespecqual_reserved: TYPESPEC
1007 | initdecls ',' initdcl
1012 | notype_initdecls ',' initdcl
1018 | ASM_KEYWORD '(' string ')'
1019 { if (TREE_CHAIN ($3)) $3 = combine_strings ($3);
1025 declarator maybeasm maybe_attribute '='
1026 { $<ttype>$ = start_decl ($1, current_declspecs, 1,
1027 $3, prefix_attributes);
1028 start_init ($<ttype>$, $2, global_bindings_p ()); }
1030 /* Note how the declaration of the variable is in effect while its init is parsed! */
1032 finish_decl ($<ttype>5, $6, $2); }
1033 | declarator maybeasm maybe_attribute
1034 { tree d = start_decl ($1, current_declspecs, 0,
1035 $3, prefix_attributes);
1036 finish_decl (d, NULL_TREE, $2);
1041 notype_declarator maybeasm maybe_attribute '='
1042 { $<ttype>$ = start_decl ($1, current_declspecs, 1,
1043 $3, prefix_attributes);
1044 start_init ($<ttype>$, $2, global_bindings_p ()); }
1046 /* Note how the declaration of the variable is in effect while its init is parsed! */
1048 decl_attributes ($<ttype>5, $3, prefix_attributes);
1049 finish_decl ($<ttype>5, $6, $2); }
1050 | notype_declarator maybeasm maybe_attribute
1051 { tree d = start_decl ($1, current_declspecs, 0,
1052 $3, prefix_attributes);
1053 finish_decl (d, NULL_TREE, $2); }
1055 /* the * rules are dummies to accept the Apollo extended syntax
1056 so that the header files compile. */
1067 | attributes attribute
1068 { $$ = chainon ($1, $2); }
1072 ATTRIBUTE '(' '(' attribute_list ')' ')'
1079 | attribute_list ',' attrib
1080 { $$ = chainon ($1, $3); }
1087 { $$ = build_tree_list ($1, NULL_TREE); }
1088 | any_word '(' IDENTIFIER ')'
1089 { $$ = build_tree_list ($1, build_tree_list (NULL_TREE, $3)); }
1090 | any_word '(' IDENTIFIER ',' nonnull_exprlist ')'
1091 { $$ = build_tree_list ($1, tree_cons (NULL_TREE, $3, $5)); }
1092 | any_word '(' exprlist ')'
1093 { $$ = build_tree_list ($1, $3); }
1096 /* This still leaves out most reserved keywords,
1097 shouldn't we include them? */
1106 /* Initializers. `init' is the entry point. */
1111 { really_start_incremental_init (NULL_TREE); }
1112 initlist_maybe_comma '}'
1113 { $$ = pop_init_level (0); }
1115 { $$ = error_mark_node; }
1118 /* `initlist_maybe_comma' is the guts of an initializer in braces. */
1119 initlist_maybe_comma:
1122 pedwarn ("ISO C forbids empty initializer braces"); }
1123 | initlist1 maybecomma
1128 | initlist1 ',' initelt
1131 /* `initelt' is a single element of an initializer.
1132 It may use braces. */
1134 designator_list '=' initval
1135 | designator initval
1137 { set_init_label ($1); }
1144 { push_init_level (0); }
1145 initlist_maybe_comma '}'
1146 { process_init_element (pop_init_level (0)); }
1148 { process_init_element ($1); }
1154 | designator_list designator
1159 { set_init_label ($2); }
1160 /* These are for labeled elements. The syntax for an array element
1161 initializer conflicts with the syntax for an Objective-C message,
1162 so don't include these productions in the Objective-C grammar. */
1164 | '[' expr_no_commas ELLIPSIS expr_no_commas ']'
1165 { set_init_index ($2, $4); }
1166 | '[' expr_no_commas ']'
1167 { set_init_index ($2, NULL_TREE); }
1174 pedwarn ("ISO C forbids nested functions");
1176 push_function_context ();
1177 if (! start_function (current_declspecs, $1,
1178 prefix_attributes, NULL_TREE))
1180 pop_function_context ();
1183 reinit_parse_for_function (); }
1184 old_style_parm_decls
1185 { store_parm_decls (); }
1186 /* This used to use compstmt_or_error.
1187 That caused a bug with input `f(g) int g {}',
1188 where the use of YYERROR1 above caused an error
1189 which then was handled by compstmt_or_error.
1190 There followed a repeated execution of that same rule,
1191 which called YYERROR1 again, and so on. */
1193 { finish_function (1);
1194 pop_function_context (); }
1197 notype_nested_function:
1200 pedwarn ("ISO C forbids nested functions");
1202 push_function_context ();
1203 if (! start_function (current_declspecs, $1,
1204 prefix_attributes, NULL_TREE))
1206 pop_function_context ();
1209 reinit_parse_for_function (); }
1210 old_style_parm_decls
1211 { store_parm_decls (); }
1212 /* This used to use compstmt_or_error.
1213 That caused a bug with input `f(g) int g {}',
1214 where the use of YYERROR1 above caused an error
1215 which then was handled by compstmt_or_error.
1216 There followed a repeated execution of that same rule,
1217 which called YYERROR1 again, and so on. */
1219 { finish_function (1);
1220 pop_function_context (); }
1223 /* Any kind of declarator (thus, all declarators allowed
1224 after an explicit typespec). */
1227 after_type_declarator
1231 /* A declarator that is allowed only after an explicit typespec. */
1233 after_type_declarator:
1234 '(' after_type_declarator ')'
1236 | after_type_declarator '(' parmlist_or_identifiers %prec '.'
1237 { $$ = build_nt (CALL_EXPR, $1, $3, NULL_TREE); }
1238 /* | after_type_declarator '(' error ')' %prec '.'
1239 { $$ = build_nt (CALL_EXPR, $1, NULL_TREE, NULL_TREE);
1240 poplevel (0, 0, 0); } */
1241 | after_type_declarator '[' expr ']' %prec '.'
1242 { $$ = build_nt (ARRAY_REF, $1, $3); }
1243 | after_type_declarator '[' ']' %prec '.'
1244 { $$ = build_nt (ARRAY_REF, $1, NULL_TREE); }
1245 | '*' type_quals after_type_declarator %prec UNARY
1246 { $$ = make_pointer_declarator ($2, $3); }
1247 /* ??? Yuck. setattrs is a quick hack. We can't use
1248 prefix_attributes because $1 only applies to this
1249 declarator. We assume setspecs has already been done.
1250 setattrs also avoids 5 reduce/reduce conflicts (otherwise multiple
1251 attributes could be recognized here or in `attributes'). */
1252 | attributes setattrs after_type_declarator
1260 /* Kinds of declarator that can appear in a parameter list
1261 in addition to notype_declarator. This is like after_type_declarator
1262 but does not allow a typedef name in parentheses as an identifier
1263 (because it would conflict with a function with that typedef as arg). */
1266 parm_declarator '(' parmlist_or_identifiers %prec '.'
1267 { $$ = build_nt (CALL_EXPR, $1, $3, NULL_TREE); }
1268 /* | parm_declarator '(' error ')' %prec '.'
1269 { $$ = build_nt (CALL_EXPR, $1, NULL_TREE, NULL_TREE);
1270 poplevel (0, 0, 0); } */
1272 | parm_declarator '[' '*' ']' %prec '.'
1273 { $$ = build_nt (ARRAY_REF, $1, NULL_TREE);
1275 error ("`[*]' in parameter declaration only allowed in ISO C 99");
1278 | parm_declarator '[' expr ']' %prec '.'
1279 { $$ = build_nt (ARRAY_REF, $1, $3); }
1280 | parm_declarator '[' ']' %prec '.'
1281 { $$ = build_nt (ARRAY_REF, $1, NULL_TREE); }
1282 | '*' type_quals parm_declarator %prec UNARY
1283 { $$ = make_pointer_declarator ($2, $3); }
1284 /* ??? Yuck. setattrs is a quick hack. We can't use
1285 prefix_attributes because $1 only applies to this
1286 declarator. We assume setspecs has already been done.
1287 setattrs also avoids 5 reduce/reduce conflicts (otherwise multiple
1288 attributes could be recognized here or in `attributes'). */
1289 | attributes setattrs parm_declarator
1294 /* A declarator allowed whether or not there has been
1295 an explicit typespec. These cannot redeclare a typedef-name. */
1298 notype_declarator '(' parmlist_or_identifiers %prec '.'
1299 { $$ = build_nt (CALL_EXPR, $1, $3, NULL_TREE); }
1300 /* | notype_declarator '(' error ')' %prec '.'
1301 { $$ = build_nt (CALL_EXPR, $1, NULL_TREE, NULL_TREE);
1302 poplevel (0, 0, 0); } */
1303 | '(' notype_declarator ')'
1305 | '*' type_quals notype_declarator %prec UNARY
1306 { $$ = make_pointer_declarator ($2, $3); }
1308 | notype_declarator '[' '*' ']' %prec '.'
1309 { $$ = build_nt (ARRAY_REF, $1, NULL_TREE);
1311 error ("`[*]' in parameter declaration only allowed in ISO C 99");
1314 | notype_declarator '[' expr ']' %prec '.'
1315 { $$ = build_nt (ARRAY_REF, $1, $3); }
1316 | notype_declarator '[' ']' %prec '.'
1317 { $$ = build_nt (ARRAY_REF, $1, NULL_TREE); }
1318 /* ??? Yuck. setattrs is a quick hack. We can't use
1319 prefix_attributes because $1 only applies to this
1320 declarator. We assume setspecs has already been done.
1321 setattrs also avoids 5 reduce/reduce conflicts (otherwise multiple
1322 attributes could be recognized here or in `attributes'). */
1323 | attributes setattrs notype_declarator
1350 struct_head identifier '{'
1351 { $$ = start_struct (RECORD_TYPE, $2);
1352 /* Start scope of tag before parsing components. */
1354 component_decl_list '}' maybe_attribute
1355 { $$ = finish_struct ($<ttype>4, $5, chainon ($1, $7)); }
1356 | struct_head '{' component_decl_list '}' maybe_attribute
1357 { $$ = finish_struct (start_struct (RECORD_TYPE, NULL_TREE),
1358 $3, chainon ($1, $5));
1360 | struct_head identifier
1361 { $$ = xref_tag (RECORD_TYPE, $2); }
1362 | union_head identifier '{'
1363 { $$ = start_struct (UNION_TYPE, $2); }
1364 component_decl_list '}' maybe_attribute
1365 { $$ = finish_struct ($<ttype>4, $5, chainon ($1, $7)); }
1366 | union_head '{' component_decl_list '}' maybe_attribute
1367 { $$ = finish_struct (start_struct (UNION_TYPE, NULL_TREE),
1368 $3, chainon ($1, $5));
1370 | union_head identifier
1371 { $$ = xref_tag (UNION_TYPE, $2); }
1372 | enum_head identifier '{'
1373 { $$ = start_enum ($2); }
1374 enumlist maybecomma_warn '}' maybe_attribute
1375 { $$ = finish_enum ($<ttype>4, nreverse ($5),
1376 chainon ($1, $8)); }
1378 { $$ = start_enum (NULL_TREE); }
1379 enumlist maybecomma_warn '}' maybe_attribute
1380 { $$ = finish_enum ($<ttype>3, nreverse ($4),
1381 chainon ($1, $7)); }
1382 | enum_head identifier
1383 { $$ = xref_tag (ENUMERAL_TYPE, $2); }
1394 { if (pedantic && ! flag_isoc99)
1395 pedwarn ("comma at end of enumerator list"); }
1398 component_decl_list:
1399 component_decl_list2
1401 | component_decl_list2 component_decl
1402 { $$ = chainon ($1, $2);
1403 pedwarn ("no semicolon at end of struct or union"); }
1406 component_decl_list2: /* empty */
1408 | component_decl_list2 component_decl ';'
1409 { $$ = chainon ($1, $2); }
1410 | component_decl_list2 ';'
1412 pedwarn ("extra semicolon in struct or union specified"); }
1414 /* foo(sizeof(struct{ @defs(ClassName)})); */
1415 | DEFS '(' CLASSNAME ')'
1417 tree interface = lookup_interface ($3);
1420 $$ = get_class_ivars (interface);
1423 error ("Cannot find interface declaration for `%s'",
1424 IDENTIFIER_POINTER ($3));
1431 /* There is a shift-reduce conflict here, because `components' may
1432 start with a `typename'. It happens that shifting (the default resolution)
1433 does the right thing, because it treats the `typename' as part of
1434 a `typed_typespecs'.
1436 It is possible that this same technique would allow the distinction
1437 between `notype_initdecls' and `initdecls' to be eliminated.
1438 But I am being cautious and not trying it. */
1441 typed_typespecs setspecs components
1443 current_declspecs = TREE_VALUE (declspec_stack);
1444 prefix_attributes = TREE_PURPOSE (declspec_stack);
1445 declspec_stack = TREE_CHAIN (declspec_stack); }
1446 | typed_typespecs setspecs save_filename save_lineno maybe_attribute
1448 /* Support for unnamed structs or unions as members of
1449 structs or unions (which is [a] useful and [b] supports
1452 pedwarn ("ISO C doesn't support unnamed structs/unions");
1454 $$ = grokfield($3, $4, NULL, current_declspecs, NULL_TREE);
1455 current_declspecs = TREE_VALUE (declspec_stack);
1456 prefix_attributes = TREE_PURPOSE (declspec_stack);
1457 declspec_stack = TREE_CHAIN (declspec_stack);
1459 | nonempty_type_quals setspecs components
1461 current_declspecs = TREE_VALUE (declspec_stack);
1462 prefix_attributes = TREE_PURPOSE (declspec_stack);
1463 declspec_stack = TREE_CHAIN (declspec_stack); }
1464 | nonempty_type_quals
1466 pedwarn ("ISO C forbids member declarations with no members");
1471 | extension component_decl
1473 RESTORE_WARN_FLAGS ($1); }
1477 component_declarator
1478 | components ',' component_declarator
1479 { $$ = chainon ($1, $3); }
1482 component_declarator:
1483 save_filename save_lineno declarator maybe_attribute
1484 { $$ = grokfield ($1, $2, $3, current_declspecs, NULL_TREE);
1485 decl_attributes ($$, $4, prefix_attributes); }
1486 | save_filename save_lineno
1487 declarator ':' expr_no_commas maybe_attribute
1488 { $$ = grokfield ($1, $2, $3, current_declspecs, $5);
1489 decl_attributes ($$, $6, prefix_attributes); }
1490 | save_filename save_lineno ':' expr_no_commas maybe_attribute
1491 { $$ = grokfield ($1, $2, NULL_TREE, current_declspecs, $4);
1492 decl_attributes ($$, $5, prefix_attributes); }
1495 /* We chain the enumerators in reverse order.
1496 They are put in forward order where enumlist is used.
1497 (The order used to be significant, but no longer is so.
1498 However, we still maintain the order, just to be clean.) */
1502 | enumlist ',' enumerator
1503 { if ($1 == error_mark_node)
1506 $$ = chainon ($3, $1); }
1508 { $$ = error_mark_node; }
1514 { $$ = build_enumerator ($1, NULL_TREE); }
1515 | identifier '=' expr_no_commas
1516 { $$ = build_enumerator ($1, $3); }
1520 typed_typespecs absdcl
1521 { $$ = build_tree_list ($1, $2); }
1522 | nonempty_type_quals absdcl
1523 { $$ = build_tree_list ($1, $2); }
1526 absdcl: /* an absolute declarator */
1532 nonempty_type_quals:
1534 { $$ = tree_cons (NULL_TREE, $1, NULL_TREE); }
1535 | nonempty_type_quals TYPE_QUAL
1536 { $$ = tree_cons (NULL_TREE, $2, $1); }
1542 | type_quals TYPE_QUAL
1543 { $$ = tree_cons (NULL_TREE, $2, $1); }
1546 absdcl1: /* a nonempty absolute declarator */
1549 /* `(typedef)1' is `int'. */
1550 | '*' type_quals absdcl1 %prec UNARY
1551 { $$ = make_pointer_declarator ($2, $3); }
1552 | '*' type_quals %prec UNARY
1553 { $$ = make_pointer_declarator ($2, NULL_TREE); }
1554 | absdcl1 '(' parmlist %prec '.'
1555 { $$ = build_nt (CALL_EXPR, $1, $3, NULL_TREE); }
1556 | absdcl1 '[' expr ']' %prec '.'
1557 { $$ = build_nt (ARRAY_REF, $1, $3); }
1558 | absdcl1 '[' ']' %prec '.'
1559 { $$ = build_nt (ARRAY_REF, $1, NULL_TREE); }
1560 | '(' parmlist %prec '.'
1561 { $$ = build_nt (CALL_EXPR, NULL_TREE, $2, NULL_TREE); }
1562 | '[' expr ']' %prec '.'
1563 { $$ = build_nt (ARRAY_REF, NULL_TREE, $2); }
1565 { $$ = build_nt (ARRAY_REF, NULL_TREE, NULL_TREE); }
1566 /* ??? It appears we have to support attributes here, however
1567 using prefix_attributes is wrong. */
1568 | attributes setattrs absdcl1
1572 /* at least one statement, the first of which parses without error. */
1573 /* stmts is used only after decls, so an invalid first statement
1574 is actually regarded as an invalid decl and part of the decls. */
1577 lineno_stmt_or_labels
1580 pedwarn ("ISO C forbids label at end of compound statement");
1584 lineno_stmt_or_labels:
1585 lineno_stmt_or_label
1586 | lineno_stmt_or_labels lineno_stmt_or_label
1588 | lineno_stmt_or_labels errstmt
1600 pushlevel: /* empty */
1601 { emit_line_note (input_filename, lineno);
1604 expand_start_bindings (0);
1606 if (objc_method_context)
1612 /* Read zero or more forward-declarations for labels
1613 that nested functions can jump to. */
1618 pedwarn ("ISO C forbids label declarations"); }
1623 | label_decls label_decl
1627 LABEL identifiers_or_typenames ';'
1629 for (link = $2; link; link = TREE_CHAIN (link))
1631 tree label = shadow_label (TREE_VALUE (link));
1632 C_DECLARED_LABEL_FLAG (label) = 1;
1633 declare_nonlocal_label (label);
1638 /* This is the body of a function definition.
1639 It causes syntax errors to ignore to the next openbrace. */
1646 compstmt_start: '{' { compstmt_count++; }
1648 compstmt_nostart: '}'
1649 { $$ = convert (void_type_node, integer_zero_node); }
1650 | pushlevel maybe_label_decls decls xstmts '}'
1651 { emit_line_note (input_filename, lineno);
1652 expand_end_bindings (getdecls (), 1, 0);
1653 $$ = poplevel (1, 1, 0); }
1654 | pushlevel maybe_label_decls error '}'
1655 { emit_line_note (input_filename, lineno);
1656 expand_end_bindings (getdecls (), kept_level_p (), 0);
1657 $$ = poplevel (kept_level_p (), 0, 0); }
1658 | pushlevel maybe_label_decls stmts '}'
1659 { emit_line_note (input_filename, lineno);
1660 expand_end_bindings (getdecls (), kept_level_p (), 0);
1661 $$ = poplevel (kept_level_p (), 0, 0); }
1664 compstmt_primary_start:
1666 { if (current_function_decl == 0)
1668 error ("braced-group within expression allowed only inside a function");
1671 /* We must force a BLOCK for this level
1672 so that, if it is not expanded later,
1673 there is a way to turn off the entire subtree of blocks
1674 that are contained in it. */
1676 push_iterator_stack ();
1677 push_label_level ();
1678 $$ = expand_start_stmt_expr ();
1682 compstmt: compstmt_start compstmt_nostart
1686 /* Value is number of statements counted as of the closeparen. */
1688 if_prefix lineno_labeled_stmt
1689 /* Make sure c_expand_end_cond is run once
1690 for each call to c_expand_start_cond.
1691 Otherwise a crash is likely. */
1697 { emit_line_note ($<filename>-1, $<lineno>0);
1698 c_expand_start_cond (truthvalue_conversion ($3), 0,
1700 $<itype>$ = stmt_count;
1701 if_stmt_file = $<filename>-1;
1702 if_stmt_line = $<lineno>0;
1703 position_after_white_space (); }
1706 /* This is a subroutine of stmt.
1707 It is used twice, once for valid DO statements
1708 and once for catching errors in parsing the end test. */
1713 emit_line_note ($<filename>-1, $<lineno>0);
1714 /* See comment in `while' alternative, above. */
1716 expand_start_loop_continue_elsewhere (1);
1717 position_after_white_space (); }
1718 lineno_labeled_stmt WHILE
1719 { expand_loop_continue_here (); }
1723 { $$ = input_filename; }
1730 lineno_labeled_stmt:
1731 save_filename save_lineno stmt
1733 /* | save_filename save_lineno error
1736 | save_filename save_lineno label lineno_labeled_stmt
1740 lineno_stmt_or_label:
1741 save_filename save_lineno stmt_or_label
1752 /* Parse a single real statement, not including any labels. */
1759 emit_line_note ($<filename>-1, $<lineno>0);
1760 /* It appears that this should not be done--that a non-lvalue array
1761 shouldn't get an error if the value isn't used.
1762 Section 3.2.2.1 says that an array lvalue gets converted to a pointer
1763 if it appears as a top-level expression,
1764 but says nothing about non-lvalue arrays. */
1766 /* Call default_conversion to get an error
1767 on referring to a register array if pedantic. */
1768 if (TREE_CODE (TREE_TYPE ($1)) == ARRAY_TYPE
1769 || TREE_CODE (TREE_TYPE ($1)) == FUNCTION_TYPE)
1770 $1 = default_conversion ($1);
1772 iterator_expand ($1); }
1774 { c_expand_start_else ();
1775 $<itype>1 = stmt_count;
1776 position_after_white_space (); }
1778 { c_expand_end_cond ();
1779 if (extra_warnings && stmt_count == $<itype>1)
1780 warning ("empty body in an else-statement"); }
1781 | simple_if %prec IF
1782 { c_expand_end_cond ();
1783 /* This warning is here instead of in simple_if, because we
1784 do not want a warning if an empty if is followed by an
1785 else statement. Increment stmt_count so we don't
1786 give a second error if this is a nested `if'. */
1787 if (extra_warnings && stmt_count++ == $<itype>1)
1788 warning_with_file_and_line (if_stmt_file, if_stmt_line,
1789 "empty body in an if-statement"); }
1790 /* Make sure c_expand_end_cond is run once
1791 for each call to c_expand_start_cond.
1792 Otherwise a crash is likely. */
1793 | simple_if ELSE error
1794 { c_expand_end_cond (); }
1797 emit_line_note ($<filename>-1, $<lineno>0);
1798 /* The emit_nop used to come before emit_line_note,
1799 but that made the nop seem like part of the preceding line.
1800 And that was confusing when the preceding line was
1801 inside of an if statement and was not really executed.
1802 I think it ought to work to put the nop after the line number.
1803 We will see. --rms, July 15, 1991. */
1806 { /* Don't start the loop till we have succeeded
1807 in parsing the end test. This is to make sure
1808 that we end every loop we start. */
1809 expand_start_loop (1);
1810 emit_line_note (input_filename, lineno);
1811 expand_exit_loop_if_false (NULL_PTR,
1812 truthvalue_conversion ($4));
1813 position_after_white_space (); }
1815 { expand_end_loop (); }
1818 { emit_line_note (input_filename, lineno);
1819 expand_exit_loop_if_false (NULL_PTR,
1820 truthvalue_conversion ($3));
1821 expand_end_loop (); }
1822 /* This rule is needed to make sure we end every loop we start. */
1823 | do_stmt_start error
1824 { expand_end_loop (); }
1828 emit_line_note ($<filename>-1, $<lineno>0);
1829 /* See comment in `while' alternative, above. */
1831 if ($3) c_expand_expr_stmt ($3);
1832 /* Next step is to call expand_start_loop_continue_elsewhere,
1833 but wait till after we parse the entire for (...).
1834 Otherwise, invalid input might cause us to call that
1835 fn without calling expand_end_loop. */
1838 /* Can't emit now; wait till after expand_start_loop... */
1839 { $<lineno>7 = lineno;
1840 $<filename>$ = input_filename; }
1843 /* Start the loop. Doing this after parsing
1844 all the expressions ensures we will end the loop. */
1845 expand_start_loop_continue_elsewhere (1);
1846 /* Emit the end-test, with a line number. */
1847 emit_line_note ($<filename>8, $<lineno>7);
1849 expand_exit_loop_if_false (NULL_PTR,
1850 truthvalue_conversion ($6));
1851 $<lineno>7 = lineno;
1852 $<filename>8 = input_filename;
1853 position_after_white_space (); }
1855 { /* Emit the increment expression, with a line number. */
1856 emit_line_note ($<filename>8, $<lineno>7);
1857 expand_loop_continue_here ();
1859 c_expand_expr_stmt ($9);
1860 expand_end_loop (); }
1861 | SWITCH '(' expr ')'
1863 emit_line_note ($<filename>-1, $<lineno>0);
1864 c_expand_start_case ($3);
1865 position_after_white_space (); }
1867 { expand_end_case ($3); }
1869 { build_break_stmt ();
1871 genrtl_break_stmt (); }
1873 { build_continue_stmt ();
1875 genrtl_continue_stmt (); }
1877 { tree return_stmt = build_return_stmt (NULL_TREE);
1879 genrtl_return_stmt (RETURN_EXPR(return_stmt)); }
1881 { tree return_stmt = build_return_stmt ($2);
1883 genrtl_return_stmt (RETURN_EXPR(return_stmt)); }
1884 | ASM_KEYWORD maybe_type_qual '(' expr ')' ';'
1886 emit_line_note ($<filename>-1, $<lineno>0);
1888 if ((TREE_CODE ($4) == ADDR_EXPR
1889 && TREE_CODE (TREE_OPERAND ($4, 0)) == STRING_CST)
1890 || TREE_CODE ($4) == STRING_CST)
1893 error ("argument of `asm' is not a constant string"); }
1894 /* This is the case with just output operands. */
1895 | ASM_KEYWORD maybe_type_qual '(' expr ':' asm_operands ')' ';'
1897 emit_line_note ($<filename>-1, $<lineno>0);
1898 c_expand_asm_operands ($4, $6, NULL_TREE, NULL_TREE,
1899 $2 == ridpointers[(int)RID_VOLATILE],
1900 input_filename, lineno); }
1901 /* This is the case with input operands as well. */
1902 | ASM_KEYWORD maybe_type_qual '(' expr ':' asm_operands ':' asm_operands ')' ';'
1904 emit_line_note ($<filename>-1, $<lineno>0);
1905 c_expand_asm_operands ($4, $6, $8, NULL_TREE,
1906 $2 == ridpointers[(int)RID_VOLATILE],
1907 input_filename, lineno); }
1908 /* This is the case with clobbered registers as well. */
1909 | ASM_KEYWORD maybe_type_qual '(' expr ':' asm_operands ':'
1910 asm_operands ':' asm_clobbers ')' ';'
1912 emit_line_note ($<filename>-1, $<lineno>0);
1913 c_expand_asm_operands ($4, $6, $8, $10,
1914 $2 == ridpointers[(int)RID_VOLATILE],
1915 input_filename, lineno); }
1916 | GOTO identifier ';'
1919 emit_line_note ($<filename>-1, $<lineno>0);
1920 decl = lookup_label ($2);
1923 TREE_USED (decl) = 1;
1929 pedwarn ("ISO C forbids `goto *expr;'");
1931 emit_line_note ($<filename>-1, $<lineno>0);
1932 expand_computed_goto (convert (ptr_type_node, $3)); }
1937 all_iter_stmt_simple
1938 /* | all_iter_stmt_with_decl */
1941 all_iter_stmt_simple:
1944 /* The value returned by this action is */
1945 /* 1 if everything is OK */
1946 /* 0 in case of error or already bound iterator */
1949 if (TREE_CODE ($3) != VAR_DECL)
1950 error ("invalid `for (ITERATOR)' syntax");
1951 else if (! ITERATOR_P ($3))
1952 error ("`%s' is not an iterator",
1953 IDENTIFIER_POINTER (DECL_NAME ($3)));
1954 else if (ITERATOR_BOUND_P ($3))
1955 error ("`for (%s)' inside expansion of same iterator",
1956 IDENTIFIER_POINTER (DECL_NAME ($3)));
1960 iterator_for_loop_start ($3);
1966 iterator_for_loop_end ($3);
1969 /* This really should allow any kind of declaration,
1970 for generality. Fix it before turning it back on.
1972 all_iter_stmt_with_decl:
1973 FOR '(' ITERATOR pushlevel setspecs iterator_spec ')'
1975 */ /* The value returned by this action is */
1976 /* 1 if everything is OK */
1977 /* 0 in case of error or already bound iterator */
1979 iterator_for_loop_start ($6);
1983 iterator_for_loop_end ($6);
1984 emit_line_note (input_filename, lineno);
1985 expand_end_bindings (getdecls (), 1, 0);
1986 $<ttype>$ = poplevel (1, 1, 0);
1990 /* Any kind of label, including jump labels and case labels.
1991 ANSI C accepts labels only before statements, but we allow them
1992 also at the end of a compound statement. */
1994 label: CASE expr_no_commas ':'
1995 { tree case_label_tree = build_case_label ($2, NULL_TREE);
1997 genrtl_case_label(CASE_LOW(case_label_tree), CASE_HIGH(case_label_tree));
1998 position_after_white_space ();
2000 | CASE expr_no_commas ELLIPSIS expr_no_commas ':'
2001 { tree case_label_tree = build_case_label ($2, $4);
2003 genrtl_case_label(CASE_LOW(case_label_tree), CASE_HIGH(case_label_tree));
2004 position_after_white_space ();
2007 { tree case_label_tree = build_case_label (NULL_TREE, NULL_TREE);
2009 genrtl_case_label(CASE_LOW(case_label_tree), CASE_HIGH(case_label_tree));
2010 position_after_white_space ();
2012 | identifier ':' maybe_attribute
2013 { tree label = define_label (input_filename, lineno, $1);
2018 expand_label (label);
2019 decl_attributes (label, $3, NULL_TREE);
2021 position_after_white_space (); }
2024 /* Either a type-qualifier or nothing. First thing in an `asm' statement. */
2028 { emit_line_note (input_filename, lineno);
2031 { emit_line_note (input_filename, lineno); }
2040 /* These are the operands other than the first string and colon
2041 in asm ("addextend %2,%1": "=dm" (x), "0" (y), "g" (*x)) */
2042 asm_operands: /* empty */
2044 | nonnull_asm_operands
2047 nonnull_asm_operands:
2049 | nonnull_asm_operands ',' asm_operand
2050 { $$ = chainon ($1, $3); }
2055 { $$ = build_tree_list ($1, $3); }
2060 { $$ = tree_cons (NULL_TREE, combine_strings ($1), NULL_TREE); }
2061 | asm_clobbers ',' string
2062 { $$ = tree_cons (NULL_TREE, combine_strings ($3), $1); }
2065 /* This is what appears inside the parens in a function declarator.
2066 Its value is a list of ..._TYPE nodes. */
2069 clear_parm_order ();
2070 declare_parm_level (0); }
2073 parmlist_tags_warning ();
2074 poplevel (0, 0, 0); }
2082 pedwarn ("ISO C forbids forward parameter declarations");
2083 /* Mark the forward decls as such. */
2084 for (parm = getdecls (); parm; parm = TREE_CHAIN (parm))
2085 TREE_ASM_WRITTEN (parm) = 1;
2086 clear_parm_order (); }
2090 { $$ = tree_cons (NULL_TREE, NULL_TREE, NULL_TREE); }
2093 /* This is what appears inside the parens in a function declarator.
2094 Is value is represented in the format that grokdeclarator expects. */
2095 parmlist_2: /* empty */
2096 { $$ = get_parm_info (0); }
2098 { $$ = get_parm_info (0);
2099 /* Gcc used to allow this as an extension. However, it does
2100 not work for all targets, and thus has been disabled.
2101 Also, since func (...) and func () are indistinguishable,
2102 it caused problems with the code in expand_builtin which
2103 tries to verify that BUILT_IN_NEXT_ARG is being used
2105 error ("ISO C requires a named argument before `...'");
2108 { $$ = get_parm_info (1); }
2109 | parms ',' ELLIPSIS
2110 { $$ = get_parm_info (0); }
2115 { push_parm_decl ($1); }
2117 { push_parm_decl ($3); }
2120 /* A single parameter declaration or parameter type name,
2121 as found in a parmlist. */
2123 typed_declspecs setspecs parm_declarator maybe_attribute
2124 { $$ = build_tree_list (build_tree_list (current_declspecs,
2126 build_tree_list (prefix_attributes,
2128 current_declspecs = TREE_VALUE (declspec_stack);
2129 prefix_attributes = TREE_PURPOSE (declspec_stack);
2130 declspec_stack = TREE_CHAIN (declspec_stack); }
2131 | typed_declspecs setspecs notype_declarator maybe_attribute
2132 { $$ = build_tree_list (build_tree_list (current_declspecs,
2134 build_tree_list (prefix_attributes,
2136 current_declspecs = TREE_VALUE (declspec_stack);
2137 prefix_attributes = TREE_PURPOSE (declspec_stack);
2138 declspec_stack = TREE_CHAIN (declspec_stack); }
2139 | typed_declspecs setspecs absdcl maybe_attribute
2140 { $$ = build_tree_list (build_tree_list (current_declspecs,
2142 build_tree_list (prefix_attributes,
2144 current_declspecs = TREE_VALUE (declspec_stack);
2145 prefix_attributes = TREE_PURPOSE (declspec_stack);
2146 declspec_stack = TREE_CHAIN (declspec_stack); }
2147 | declmods setspecs notype_declarator maybe_attribute
2148 { $$ = build_tree_list (build_tree_list (current_declspecs,
2150 build_tree_list (prefix_attributes,
2152 current_declspecs = TREE_VALUE (declspec_stack);
2153 prefix_attributes = TREE_PURPOSE (declspec_stack);
2154 declspec_stack = TREE_CHAIN (declspec_stack); }
2156 | declmods setspecs absdcl maybe_attribute
2157 { $$ = build_tree_list (build_tree_list (current_declspecs,
2159 build_tree_list (prefix_attributes,
2161 current_declspecs = TREE_VALUE (declspec_stack);
2162 prefix_attributes = TREE_PURPOSE (declspec_stack);
2163 declspec_stack = TREE_CHAIN (declspec_stack); }
2166 /* This is used in a function definition
2167 where either a parmlist or an identifier list is ok.
2168 Its value is a list of ..._TYPE nodes or a list of identifiers. */
2169 parmlist_or_identifiers:
2171 clear_parm_order ();
2172 declare_parm_level (1); }
2173 parmlist_or_identifiers_1
2175 parmlist_tags_warning ();
2176 poplevel (0, 0, 0); }
2179 parmlist_or_identifiers_1:
2183 for (t = $1; t; t = TREE_CHAIN (t))
2184 if (TREE_VALUE (t) == NULL_TREE)
2185 error ("`...' in old-style identifier list");
2186 $$ = tree_cons (NULL_TREE, NULL_TREE, $1); }
2189 /* A nonempty list of identifiers. */
2192 { $$ = build_tree_list (NULL_TREE, $1); }
2193 | identifiers ',' IDENTIFIER
2194 { $$ = chainon ($1, build_tree_list (NULL_TREE, $3)); }
2197 /* A nonempty list of identifiers, including typenames. */
2198 identifiers_or_typenames:
2200 { $$ = build_tree_list (NULL_TREE, $1); }
2201 | identifiers_or_typenames ',' identifier
2202 { $$ = chainon ($1, build_tree_list (NULL_TREE, $3)); }
2207 { $$ = SAVE_WARN_FLAGS();
2209 warn_pointer_arith = 0; }
2213 /* Objective-C productions. */
2223 if (objc_implementation_context)
2225 finish_class (objc_implementation_context);
2226 objc_ivar_chain = NULL_TREE;
2227 objc_implementation_context = NULL_TREE;
2230 warning ("`@end' must appear in an implementation context");
2234 /* A nonempty list of identifiers. */
2237 { $$ = build_tree_list (NULL_TREE, $1); }
2238 | identifier_list ',' identifier
2239 { $$ = chainon ($1, build_tree_list (NULL_TREE, $3)); }
2243 CLASS identifier_list ';'
2245 objc_declare_class ($2);
2249 ALIAS identifier identifier ';'
2251 objc_declare_alias ($2, $3);
2255 INTERFACE identifier protocolrefs '{'
2257 objc_interface_context = objc_ivar_context
2258 = start_class (CLASS_INTERFACE_TYPE, $2, NULL_TREE, $3);
2259 objc_public_flag = 0;
2263 continue_class (objc_interface_context);
2268 finish_class (objc_interface_context);
2269 objc_interface_context = NULL_TREE;
2272 | INTERFACE identifier protocolrefs
2274 objc_interface_context
2275 = start_class (CLASS_INTERFACE_TYPE, $2, NULL_TREE, $3);
2276 continue_class (objc_interface_context);
2281 finish_class (objc_interface_context);
2282 objc_interface_context = NULL_TREE;
2285 | INTERFACE identifier ':' identifier protocolrefs '{'
2287 objc_interface_context = objc_ivar_context
2288 = start_class (CLASS_INTERFACE_TYPE, $2, $4, $5);
2289 objc_public_flag = 0;
2293 continue_class (objc_interface_context);
2298 finish_class (objc_interface_context);
2299 objc_interface_context = NULL_TREE;
2302 | INTERFACE identifier ':' identifier protocolrefs
2304 objc_interface_context
2305 = start_class (CLASS_INTERFACE_TYPE, $2, $4, $5);
2306 continue_class (objc_interface_context);
2311 finish_class (objc_interface_context);
2312 objc_interface_context = NULL_TREE;
2315 | IMPLEMENTATION identifier '{'
2317 objc_implementation_context = objc_ivar_context
2318 = start_class (CLASS_IMPLEMENTATION_TYPE, $2, NULL_TREE, NULL_TREE);
2319 objc_public_flag = 0;
2324 = continue_class (objc_implementation_context);
2327 | IMPLEMENTATION identifier
2329 objc_implementation_context
2330 = start_class (CLASS_IMPLEMENTATION_TYPE, $2, NULL_TREE, NULL_TREE);
2332 = continue_class (objc_implementation_context);
2335 | IMPLEMENTATION identifier ':' identifier '{'
2337 objc_implementation_context = objc_ivar_context
2338 = start_class (CLASS_IMPLEMENTATION_TYPE, $2, $4, NULL_TREE);
2339 objc_public_flag = 0;
2344 = continue_class (objc_implementation_context);
2347 | IMPLEMENTATION identifier ':' identifier
2349 objc_implementation_context
2350 = start_class (CLASS_IMPLEMENTATION_TYPE, $2, $4, NULL_TREE);
2352 = continue_class (objc_implementation_context);
2355 | INTERFACE identifier '(' identifier ')' protocolrefs
2357 objc_interface_context
2358 = start_class (CATEGORY_INTERFACE_TYPE, $2, $4, $6);
2359 continue_class (objc_interface_context);
2364 finish_class (objc_interface_context);
2365 objc_interface_context = NULL_TREE;
2368 | IMPLEMENTATION identifier '(' identifier ')'
2370 objc_implementation_context
2371 = start_class (CATEGORY_IMPLEMENTATION_TYPE, $2, $4, NULL_TREE);
2373 = continue_class (objc_implementation_context);
2378 PROTOCOL identifier protocolrefs
2380 remember_protocol_qualifiers ();
2381 objc_interface_context
2382 = start_protocol(PROTOCOL_INTERFACE_TYPE, $2, $3);
2386 forget_protocol_qualifiers();
2387 finish_protocol(objc_interface_context);
2388 objc_interface_context = NULL_TREE;
2397 | non_empty_protocolrefs
2400 non_empty_protocolrefs:
2401 ARITHCOMPARE identifier_list ARITHCOMPARE
2403 if ($1 == LT_EXPR && $3 == GT_EXPR)
2411 ivar_decl_list visibility_spec ivar_decls
2416 PRIVATE { objc_public_flag = 2; }
2417 | PROTECTED { objc_public_flag = 0; }
2418 | PUBLIC { objc_public_flag = 1; }
2426 | ivar_decls ivar_decl ';'
2430 pedwarn ("extra semicolon in struct or union specified");
2435 /* There is a shift-reduce conflict here, because `components' may
2436 start with a `typename'. It happens that shifting (the default resolution)
2437 does the right thing, because it treats the `typename' as part of
2438 a `typed_typespecs'.
2440 It is possible that this same technique would allow the distinction
2441 between `notype_initdecls' and `initdecls' to be eliminated.
2442 But I am being cautious and not trying it. */
2445 typed_typespecs setspecs ivars
2447 current_declspecs = TREE_VALUE (declspec_stack);
2448 prefix_attributes = TREE_PURPOSE (declspec_stack);
2449 declspec_stack = TREE_CHAIN (declspec_stack); }
2450 | nonempty_type_quals setspecs ivars
2452 current_declspecs = TREE_VALUE (declspec_stack);
2453 prefix_attributes = TREE_PURPOSE (declspec_stack);
2454 declspec_stack = TREE_CHAIN (declspec_stack); }
2463 | ivars ',' ivar_declarator
2469 $$ = add_instance_variable (objc_ivar_context,
2471 $1, current_declspecs,
2474 | declarator ':' expr_no_commas
2476 $$ = add_instance_variable (objc_ivar_context,
2478 $1, current_declspecs, $3);
2480 | ':' expr_no_commas
2482 $$ = add_instance_variable (objc_ivar_context,
2485 current_declspecs, $2);
2492 remember_protocol_qualifiers ();
2493 if (objc_implementation_context)
2494 objc_inherit_code = CLASS_METHOD_DECL;
2496 fatal ("method definition not in class context");
2500 forget_protocol_qualifiers ();
2501 add_class_method (objc_implementation_context, $3);
2502 start_method_def ($3);
2503 objc_method_context = $3;
2507 continue_method_def ();
2511 finish_method_def ();
2512 objc_method_context = NULL_TREE;
2517 remember_protocol_qualifiers ();
2518 if (objc_implementation_context)
2519 objc_inherit_code = INSTANCE_METHOD_DECL;
2521 fatal ("method definition not in class context");
2525 forget_protocol_qualifiers ();
2526 add_instance_method (objc_implementation_context, $3);
2527 start_method_def ($3);
2528 objc_method_context = $3;
2532 continue_method_def ();
2536 finish_method_def ();
2537 objc_method_context = NULL_TREE;
2541 /* the reason for the strange actions in this rule
2542 is so that notype_initdecls when reached via datadef
2543 can find a valid list of type and sc specs in $0. */
2547 | {$<ttype>$ = NULL_TREE; } methodprotolist2
2550 methodprotolist2: /* eliminates a shift/reduce conflict */
2553 | methodprotolist2 methodproto
2554 | methodprotolist2 {$<ttype>$ = NULL_TREE; } datadef
2565 /* Remember protocol qualifiers in prototypes. */
2566 remember_protocol_qualifiers ();
2567 objc_inherit_code = CLASS_METHOD_DECL;
2571 /* Forget protocol qualifiers here. */
2572 forget_protocol_qualifiers ();
2573 add_class_method (objc_interface_context, $3);
2579 /* Remember protocol qualifiers in prototypes. */
2580 remember_protocol_qualifiers ();
2581 objc_inherit_code = INSTANCE_METHOD_DECL;
2585 /* Forget protocol qualifiers here. */
2586 forget_protocol_qualifiers ();
2587 add_instance_method (objc_interface_context, $3);
2593 '(' typename ')' unaryselector
2595 $$ = build_method_decl (objc_inherit_code, $2, $4, NULL_TREE);
2600 $$ = build_method_decl (objc_inherit_code, NULL_TREE, $1, NULL_TREE);
2603 | '(' typename ')' keywordselector optparmlist
2605 $$ = build_method_decl (objc_inherit_code, $2, $4, $5);
2608 | keywordselector optparmlist
2610 $$ = build_method_decl (objc_inherit_code, NULL_TREE, $1, $2);
2614 /* "optarglist" assumes that start_method_def has already been called...
2615 if it is not, the "xdecls" will not be placed in the proper scope */
2622 /* to get around the following situation: "int foo (int a) int b; {}" that
2623 is synthesized when parsing "- a:a b:b; id c; id d; { ... }" */
2638 typed_declspecs setspecs myparms ';'
2639 { current_declspecs = TREE_VALUE (declspec_stack);
2640 prefix_attributes = TREE_PURPOSE (declspec_stack);
2641 declspec_stack = TREE_CHAIN (declspec_stack); }
2642 | typed_declspecs ';'
2643 { shadow_tag ($1); }
2645 { pedwarn ("empty declaration"); }
2650 { push_parm_decl ($1); }
2651 | myparms ',' myparm
2652 { push_parm_decl ($3); }
2655 /* A single parameter declaration or parameter type name,
2656 as found in a parmlist. DOES NOT ALLOW AN INITIALIZER OR ASMSPEC */
2659 parm_declarator maybe_attribute
2660 { $$ = build_tree_list (build_tree_list (current_declspecs,
2662 build_tree_list (prefix_attributes,
2664 | notype_declarator maybe_attribute
2665 { $$ = build_tree_list (build_tree_list (current_declspecs,
2667 build_tree_list (prefix_attributes,
2669 | absdcl maybe_attribute
2670 { $$ = build_tree_list (build_tree_list (current_declspecs,
2672 build_tree_list (prefix_attributes,
2683 /* oh what a kludge! */
2684 $$ = objc_ellipsis_node;
2692 /* returns a tree list node generated by get_parm_info */
2705 | keywordselector keyworddecl
2707 $$ = chainon ($1, $2);
2719 ENUM { $$ = get_identifier (token_buffer); }
2720 | STRUCT { $$ = get_identifier (token_buffer); }
2721 | UNION { $$ = get_identifier (token_buffer); }
2722 | IF { $$ = get_identifier (token_buffer); }
2723 | ELSE { $$ = get_identifier (token_buffer); }
2724 | WHILE { $$ = get_identifier (token_buffer); }
2725 | DO { $$ = get_identifier (token_buffer); }
2726 | FOR { $$ = get_identifier (token_buffer); }
2727 | SWITCH { $$ = get_identifier (token_buffer); }
2728 | CASE { $$ = get_identifier (token_buffer); }
2729 | DEFAULT { $$ = get_identifier (token_buffer); }
2730 | BREAK { $$ = get_identifier (token_buffer); }
2731 | CONTINUE { $$ = get_identifier (token_buffer); }
2732 | RETURN { $$ = get_identifier (token_buffer); }
2733 | GOTO { $$ = get_identifier (token_buffer); }
2734 | ASM_KEYWORD { $$ = get_identifier (token_buffer); }
2735 | SIZEOF { $$ = get_identifier (token_buffer); }
2736 | TYPEOF { $$ = get_identifier (token_buffer); }
2737 | ALIGNOF { $$ = get_identifier (token_buffer); }
2738 | TYPESPEC | TYPE_QUAL
2742 selector ':' '(' typename ')' identifier
2744 $$ = build_keyword_decl ($1, $4, $6);
2747 | selector ':' identifier
2749 $$ = build_keyword_decl ($1, NULL_TREE, $3);
2752 | ':' '(' typename ')' identifier
2754 $$ = build_keyword_decl (NULL_TREE, $3, $5);
2759 $$ = build_keyword_decl (NULL_TREE, NULL_TREE, $2);
2770 | keywordarglist keywordarg
2772 $$ = chainon ($1, $2);
2780 if (TREE_CHAIN ($1) == NULL_TREE)
2781 /* just return the expr., remove a level of indirection */
2782 $$ = TREE_VALUE ($1);
2784 /* we have a comma expr., we will collapse later */
2790 selector ':' keywordexpr
2792 $$ = build_tree_list ($1, $3);
2796 $$ = build_tree_list (NULL_TREE, $2);
2804 $$ = get_class_reference ($1);
2810 { objc_receiver_context = 1; }
2812 { objc_receiver_context = 0; }
2815 $$ = build_tree_list ($3, $5);
2826 | keywordnamelist keywordname
2828 $$ = chainon ($1, $2);
2835 $$ = build_tree_list ($1, NULL_TREE);
2839 $$ = build_tree_list (NULL_TREE, NULL_TREE);
2844 SELECTOR '(' selectorarg ')'
2851 PROTOCOL '(' identifier ')'
2857 /* extension to support C-structures in the archiver */
2860 ENCODE '(' typename ')'
2862 $$ = groktypename ($3);