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 Obj-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 OBJC_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 ("ANSI 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; } 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 ("ANSI 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 ("ANSI 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 { $$ = NEGATE_EXPR; }
414 { $$ = CONVERT_EXPR; }
416 { $$ = PREINCREMENT_EXPR; }
418 { $$ = PREDECREMENT_EXPR; }
420 { $$ = BIT_NOT_EXPR; }
422 { $$ = TRUTH_NOT_EXPR; }
425 expr: nonnull_exprlist
426 { $$ = build_compound_expr ($1); }
437 { $$ = build_tree_list (NULL_TREE, $1); }
438 | nonnull_exprlist ',' expr_no_commas
439 { chainon ($1, build_tree_list (NULL_TREE, $3)); }
444 | '*' cast_expr %prec UNARY
445 { $$ = build_indirect_ref ($2, "unary *"); }
446 /* __extension__ turns off -pedantic for following primary. */
447 | extension cast_expr %prec UNARY
449 RESTORE_WARN_FLAGS ($1); }
450 | unop cast_expr %prec UNARY
451 { $$ = build_unary_op ($1, $2, 0);
452 overflow_warning ($$); }
453 /* Refer to the address of a label as a pointer. */
455 { tree label = lookup_label ($2);
457 pedwarn ("ANSI C forbids `&&'");
459 $$ = null_pointer_node;
462 TREE_USED (label) = 1;
463 $$ = build1 (ADDR_EXPR, ptr_type_node, label);
464 TREE_CONSTANT ($$) = 1;
467 /* This seems to be impossible on some machines, so let's turn it off.
468 You can use __builtin_next_arg to find the anonymous stack args.
470 { tree types = TYPE_ARG_TYPES (TREE_TYPE (current_function_decl));
471 $$ = error_mark_node;
472 if (TREE_VALUE (tree_last (types)) == void_type_node)
473 error ("`&...' used in function with fixed number of arguments");
477 pedwarn ("ANSI C forbids `&...'");
478 $$ = tree_last (DECL_ARGUMENTS (current_function_decl));
479 $$ = build_unary_op (ADDR_EXPR, $$, 0);
482 | sizeof unary_expr %prec UNARY
484 if (TREE_CODE ($2) == COMPONENT_REF
485 && DECL_C_BIT_FIELD (TREE_OPERAND ($2, 1)))
486 error ("`sizeof' applied to a bit-field");
487 $$ = c_sizeof (TREE_TYPE ($2)); }
488 | sizeof '(' typename ')' %prec HYPERUNARY
490 $$ = c_sizeof (groktypename ($3)); }
491 | alignof unary_expr %prec UNARY
493 $$ = c_alignof_expr ($2); }
494 | alignof '(' typename ')' %prec HYPERUNARY
496 $$ = c_alignof (groktypename ($3)); }
497 | REALPART cast_expr %prec UNARY
498 { $$ = build_unary_op (REALPART_EXPR, $2, 0); }
499 | IMAGPART cast_expr %prec UNARY
500 { $$ = build_unary_op (IMAGPART_EXPR, $2, 0); }
501 | VA_ARG '(' expr_no_commas ',' typename ')'
502 { $$ = build_va_arg ($3, groktypename ($5)); }
506 SIZEOF { skip_evaluation++; }
510 ALIGNOF { skip_evaluation++; }
515 | '(' typename ')' cast_expr %prec UNARY
516 { tree type = groktypename ($2);
517 $$ = build_c_cast (type, $4); }
518 | '(' typename ')' '{'
519 { start_init (NULL_TREE, NULL, 0);
520 $2 = groktypename ($2);
521 really_start_incremental_init ($2); }
522 initlist_maybe_comma '}' %prec UNARY
524 tree result = pop_init_level (0);
528 if (pedantic && ! flag_isoc99)
529 pedwarn ("ANSI C forbids constructor expressions");
530 if (TYPE_NAME (type) != 0)
532 if (TREE_CODE (TYPE_NAME (type)) == IDENTIFIER_NODE)
533 name = IDENTIFIER_POINTER (TYPE_NAME (type));
535 name = IDENTIFIER_POINTER (DECL_NAME (TYPE_NAME (type)));
540 if (TREE_CODE (type) == ARRAY_TYPE && !COMPLETE_TYPE_P (type))
542 int failure = complete_array_type (type, $$, 1);
551 | expr_no_commas '+' expr_no_commas
552 { $$ = 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 { $$ = parser_build_binary_op ($2, $1, $3); }
559 | expr_no_commas '%' expr_no_commas
560 { $$ = parser_build_binary_op ($2, $1, $3); }
561 | expr_no_commas LSHIFT expr_no_commas
562 { $$ = parser_build_binary_op ($2, $1, $3); }
563 | expr_no_commas RSHIFT expr_no_commas
564 { $$ = parser_build_binary_op ($2, $1, $3); }
565 | expr_no_commas ARITHCOMPARE expr_no_commas
566 { $$ = parser_build_binary_op ($2, $1, $3); }
567 | expr_no_commas EQCOMPARE expr_no_commas
568 { $$ = 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 '^' expr_no_commas
574 { $$ = parser_build_binary_op ($2, $1, $3); }
575 | expr_no_commas ANDAND
576 { $1 = truthvalue_conversion (default_conversion ($1));
577 skip_evaluation += $1 == boolean_false_node; }
579 { skip_evaluation -= $1 == boolean_false_node;
580 $$ = parser_build_binary_op (TRUTH_ANDIF_EXPR, $1, $4); }
581 | expr_no_commas OROR
582 { $1 = truthvalue_conversion (default_conversion ($1));
583 skip_evaluation += $1 == boolean_true_node; }
585 { skip_evaluation -= $1 == boolean_true_node;
586 $$ = parser_build_binary_op (TRUTH_ORIF_EXPR, $1, $4); }
588 { $1 = truthvalue_conversion (default_conversion ($1));
589 skip_evaluation += $1 == boolean_false_node; }
591 { skip_evaluation += (($1 == boolean_true_node)
592 - ($1 == boolean_false_node)); }
594 { skip_evaluation -= $1 == boolean_true_node;
595 $$ = build_conditional_expr ($1, $4, $7); }
598 pedwarn ("ANSI C forbids omitting the middle term of a ?: expression");
599 /* Make sure first operand is calculated only once. */
600 $<ttype>2 = save_expr ($1);
601 $1 = truthvalue_conversion (default_conversion ($<ttype>2));
602 skip_evaluation += $1 == boolean_true_node; }
604 { skip_evaluation -= $1 == boolean_true_node;
605 $$ = build_conditional_expr ($1, $<ttype>2, $5); }
606 | expr_no_commas '=' expr_no_commas
608 $$ = build_modify_expr ($1, NOP_EXPR, $3);
609 class = TREE_CODE_CLASS (TREE_CODE ($$));
610 if (class == 'e' || class == '1'
611 || class == '2' || class == '<')
612 C_SET_EXP_ORIGINAL_CODE ($$, MODIFY_EXPR);
614 | expr_no_commas ASSIGN expr_no_commas
616 $$ = build_modify_expr ($1, $2, $3);
617 /* This inhibits warnings in truthvalue_conversion. */
618 class = TREE_CODE_CLASS (TREE_CODE ($$));
619 if (class == 'e' || class == '1'
620 || class == '2' || class == '<')
621 C_SET_EXP_ORIGINAL_CODE ($$, ERROR_MARK);
628 if (yychar == YYEMPTY)
630 $$ = build_external_ref ($1, yychar == '(');
634 { $$ = combine_strings ($1); }
636 { char class = TREE_CODE_CLASS (TREE_CODE ($2));
637 if (class == 'e' || class == '1'
638 || class == '2' || class == '<')
639 C_SET_EXP_ORIGINAL_CODE ($2, ERROR_MARK);
642 { $$ = error_mark_node; }
643 | compstmt_primary_start compstmt_nostart ')'
646 pedwarn ("ANSI C forbids braced-groups within expressions");
647 pop_iterator_stack ();
649 rtl_exp = expand_end_stmt_expr ($1);
650 /* The statements have side effects, so the group does. */
651 TREE_SIDE_EFFECTS (rtl_exp) = 1;
653 if (TREE_CODE ($2) == BLOCK)
655 /* Make a BIND_EXPR for the BLOCK already made. */
656 $$ = build (BIND_EXPR, TREE_TYPE (rtl_exp),
657 NULL_TREE, rtl_exp, $2);
658 /* Remove the block from the tree at this point.
659 It gets put back at the proper place
660 when the BIND_EXPR is expanded. */
666 | compstmt_primary_start error ')'
668 /* Make sure we call expand_end_stmt_expr. Otherwise
669 we are likely to lose sequences and crash later. */
670 pop_iterator_stack ();
672 expand_end_stmt_expr ($1);
673 $$ = error_mark_node;
675 | primary '(' exprlist ')' %prec '.'
676 { $$ = build_function_call ($1, $3); }
677 | primary '[' expr ']' %prec '.'
678 { $$ = build_array_ref ($1, $3); }
679 | primary '.' identifier
682 if (doing_objc_thang)
684 if (is_public ($1, $3))
685 $$ = build_component_ref ($1, $3);
687 $$ = error_mark_node;
691 $$ = build_component_ref ($1, $3);
693 | primary POINTSAT identifier
695 tree expr = build_indirect_ref ($1, "->");
698 if (doing_objc_thang)
700 if (is_public (expr, $3))
701 $$ = build_component_ref (expr, $3);
703 $$ = error_mark_node;
707 $$ = build_component_ref (expr, $3);
710 { $$ = build_unary_op (POSTINCREMENT_EXPR, $1, 0); }
712 { $$ = build_unary_op (POSTDECREMENT_EXPR, $1, 0); }
715 { $$ = build_message_expr ($1); }
717 { $$ = build_selector_expr ($1); }
719 { $$ = build_protocol_expr ($1); }
721 { $$ = build_encode_expr ($1); }
723 { $$ = build_objc_string_object ($1); }
727 /* Produces a STRING_CST with perhaps more STRING_CSTs chained onto it. */
731 { $$ = chainon ($1, $2);
733 if (warn_traditional && !in_system_header)
734 warning ("Use of ANSI string concatenation");
740 /* Produces an OBJC_STRING_CST with perhaps more OBJC_STRING_CSTs chained
744 | objc_string OBJC_STRING
745 { $$ = chainon ($1, $2); }
749 old_style_parm_decls:
753 /* ... is used here to indicate a varargs function. */
756 pedwarn ("ANSI C does not permit use of `varargs.h'"); }
759 /* The following are analogous to lineno_decl, decls and decl
760 except that they do not allow nested functions.
761 They are used for old-style parm decls. */
763 save_filename save_lineno datadecl
770 | datadecls lineno_datadecl
771 | lineno_datadecl errstmt
774 /* We don't allow prefix attributes here because they cause reduce/reduce
775 conflicts: we can't know whether we're parsing a function decl with
776 attribute suffix, or function defn with attribute prefix on first old
779 typed_declspecs_no_prefix_attr setspecs initdecls ';'
780 { current_declspecs = TREE_VALUE (declspec_stack);
781 prefix_attributes = TREE_PURPOSE (declspec_stack);
782 declspec_stack = TREE_CHAIN (declspec_stack); }
783 | declmods_no_prefix_attr setspecs notype_initdecls ';'
784 { current_declspecs = TREE_VALUE (declspec_stack);
785 prefix_attributes = TREE_PURPOSE (declspec_stack);
786 declspec_stack = TREE_CHAIN (declspec_stack); }
787 | typed_declspecs_no_prefix_attr ';'
788 { shadow_tag_warned ($1, 1);
789 pedwarn ("empty declaration"); }
790 | declmods_no_prefix_attr ';'
791 { pedwarn ("empty declaration"); }
794 /* This combination which saves a lineno before a decl
795 is the normal thing to use, rather than decl itself.
796 This is to avoid shift/reduce conflicts in contexts
797 where statement labels are allowed. */
799 save_filename save_lineno decl
807 | lineno_decl errstmt
810 /* records the type and storage class specs to use for processing
811 the declarators that follow.
812 Maintains a stack of outer-level values of current_declspecs,
813 for the sake of parm declarations nested in function declarators. */
814 setspecs: /* empty */
815 { pending_xref_error ();
816 declspec_stack = tree_cons (prefix_attributes,
819 split_specs_attrs ($<ttype>0,
820 ¤t_declspecs, &prefix_attributes); }
823 /* ??? Yuck. See after_type_declarator. */
824 setattrs: /* empty */
825 { prefix_attributes = chainon (prefix_attributes, $<ttype>0); }
829 typed_declspecs setspecs initdecls ';'
830 { current_declspecs = TREE_VALUE (declspec_stack);
831 prefix_attributes = TREE_PURPOSE (declspec_stack);
832 declspec_stack = TREE_CHAIN (declspec_stack); }
833 | declmods setspecs notype_initdecls ';'
834 { current_declspecs = TREE_VALUE (declspec_stack);
835 prefix_attributes = TREE_PURPOSE (declspec_stack);
836 declspec_stack = TREE_CHAIN (declspec_stack); }
837 | typed_declspecs setspecs nested_function
838 { current_declspecs = TREE_VALUE (declspec_stack);
839 prefix_attributes = TREE_PURPOSE (declspec_stack);
840 declspec_stack = TREE_CHAIN (declspec_stack); }
841 | declmods setspecs notype_nested_function
842 { current_declspecs = TREE_VALUE (declspec_stack);
843 prefix_attributes = TREE_PURPOSE (declspec_stack);
844 declspec_stack = TREE_CHAIN (declspec_stack); }
845 | typed_declspecs ';'
848 { pedwarn ("empty declaration"); }
850 { RESTORE_WARN_FLAGS ($1); }
853 /* Declspecs which contain at least one type specifier or typedef name.
854 (Just `const' or `volatile' is not enough.)
855 A typedef'd name following these is taken as a name to be declared.
856 Declspecs have a non-NULL TREE_VALUE, attributes do not. */
859 typespec reserved_declspecs
860 { $$ = tree_cons (NULL_TREE, $1, $2); }
861 | declmods typespec reserved_declspecs
862 { $$ = chainon ($3, tree_cons (NULL_TREE, $2, $1)); }
865 reserved_declspecs: /* empty */
867 | reserved_declspecs typespecqual_reserved
868 { $$ = tree_cons (NULL_TREE, $2, $1); }
869 | reserved_declspecs SCSPEC
870 { if (extra_warnings)
871 warning ("`%s' is not at beginning of declaration",
872 IDENTIFIER_POINTER ($2));
873 $$ = tree_cons (NULL_TREE, $2, $1); }
874 | reserved_declspecs attributes
875 { $$ = tree_cons ($2, NULL_TREE, $1); }
878 typed_declspecs_no_prefix_attr:
879 typespec reserved_declspecs_no_prefix_attr
880 { $$ = tree_cons (NULL_TREE, $1, $2); }
881 | declmods_no_prefix_attr typespec reserved_declspecs_no_prefix_attr
882 { $$ = chainon ($3, tree_cons (NULL_TREE, $2, $1)); }
885 reserved_declspecs_no_prefix_attr:
888 | reserved_declspecs_no_prefix_attr typespecqual_reserved
889 { $$ = tree_cons (NULL_TREE, $2, $1); }
890 | reserved_declspecs_no_prefix_attr SCSPEC
891 { if (extra_warnings)
892 warning ("`%s' is not at beginning of declaration",
893 IDENTIFIER_POINTER ($2));
894 $$ = tree_cons (NULL_TREE, $2, $1); }
897 /* List of just storage classes, type modifiers, and prefix attributes.
898 A declaration can start with just this, but then it cannot be used
899 to redeclare a typedef-name.
900 Declspecs have a non-NULL TREE_VALUE, attributes do not. */
903 declmods_no_prefix_attr
906 { $$ = tree_cons ($1, NULL_TREE, NULL_TREE); }
907 | declmods declmods_no_prefix_attr
908 { $$ = chainon ($2, $1); }
909 | declmods attributes
910 { $$ = tree_cons ($2, NULL_TREE, $1); }
913 declmods_no_prefix_attr:
915 { $$ = tree_cons (NULL_TREE, $1, NULL_TREE);
916 TREE_STATIC ($$) = 1; }
918 { $$ = tree_cons (NULL_TREE, $1, NULL_TREE); }
919 | declmods_no_prefix_attr TYPE_QUAL
920 { $$ = tree_cons (NULL_TREE, $2, $1);
921 TREE_STATIC ($$) = 1; }
922 | declmods_no_prefix_attr SCSPEC
923 { if (extra_warnings && TREE_STATIC ($1))
924 warning ("`%s' is not at beginning of declaration",
925 IDENTIFIER_POINTER ($2));
926 $$ = tree_cons (NULL_TREE, $2, $1);
927 TREE_STATIC ($$) = TREE_STATIC ($1); }
931 /* Used instead of declspecs where storage classes are not allowed
932 (that is, for typenames and structure components).
933 Don't accept a typedef-name if anything but a modifier precedes it. */
936 typespec reserved_typespecquals
937 { $$ = tree_cons (NULL_TREE, $1, $2); }
938 | nonempty_type_quals typespec reserved_typespecquals
939 { $$ = chainon ($3, tree_cons (NULL_TREE, $2, $1)); }
942 reserved_typespecquals: /* empty */
944 | reserved_typespecquals typespecqual_reserved
945 { $$ = tree_cons (NULL_TREE, $2, $1); }
948 /* A typespec (but not a type qualifier).
949 Once we have seen one of these in a declaration,
950 if a typedef name appears then it is being redeclared. */
955 { /* For a typedef name, record the meaning, not the name.
956 In case of `foo foo, bar;'. */
957 $$ = lookup_name ($1); }
959 | CLASSNAME protocolrefs
960 { $$ = get_static_reference ($1, $2); }
961 | OBJECTNAME protocolrefs
962 { $$ = get_object_reference ($2); }
964 /* Make "<SomeProtocol>" equivalent to "id <SomeProtocol>"
965 - nisse@lysator.liu.se */
966 | non_empty_protocolrefs
967 { $$ = get_object_reference ($1); }
969 | TYPEOF '(' expr ')'
970 { $$ = TREE_TYPE ($3); }
971 | TYPEOF '(' typename ')'
972 { $$ = groktypename ($3); }
975 /* A typespec that is a reserved word, or a type qualifier. */
977 typespecqual_reserved: TYPESPEC
984 | initdecls ',' initdcl
989 | notype_initdecls ',' initdcl
995 | ASM_KEYWORD '(' string ')'
996 { if (TREE_CHAIN ($3)) $3 = combine_strings ($3);
1002 declarator maybeasm maybe_attribute '='
1003 { $<ttype>$ = start_decl ($1, current_declspecs, 1,
1004 $3, prefix_attributes);
1005 start_init ($<ttype>$, $2, global_bindings_p ()); }
1007 /* Note how the declaration of the variable is in effect while its init is parsed! */
1009 finish_decl ($<ttype>5, $6, $2); }
1010 | declarator maybeasm maybe_attribute
1011 { tree d = start_decl ($1, current_declspecs, 0,
1012 $3, prefix_attributes);
1013 finish_decl (d, NULL_TREE, $2);
1018 notype_declarator maybeasm maybe_attribute '='
1019 { $<ttype>$ = start_decl ($1, current_declspecs, 1,
1020 $3, prefix_attributes);
1021 start_init ($<ttype>$, $2, global_bindings_p ()); }
1023 /* Note how the declaration of the variable is in effect while its init is parsed! */
1025 decl_attributes ($<ttype>5, $3, prefix_attributes);
1026 finish_decl ($<ttype>5, $6, $2); }
1027 | notype_declarator maybeasm maybe_attribute
1028 { tree d = start_decl ($1, current_declspecs, 0,
1029 $3, prefix_attributes);
1030 finish_decl (d, NULL_TREE, $2); }
1032 /* the * rules are dummies to accept the Apollo extended syntax
1033 so that the header files compile. */
1044 | attributes attribute
1045 { $$ = chainon ($1, $2); }
1049 ATTRIBUTE '(' '(' attribute_list ')' ')'
1056 | attribute_list ',' attrib
1057 { $$ = chainon ($1, $3); }
1064 { $$ = build_tree_list ($1, NULL_TREE); }
1065 | any_word '(' IDENTIFIER ')'
1066 { $$ = build_tree_list ($1, build_tree_list (NULL_TREE, $3)); }
1067 | any_word '(' IDENTIFIER ',' nonnull_exprlist ')'
1068 { $$ = build_tree_list ($1, tree_cons (NULL_TREE, $3, $5)); }
1069 | any_word '(' exprlist ')'
1070 { $$ = build_tree_list ($1, $3); }
1073 /* This still leaves out most reserved keywords,
1074 shouldn't we include them? */
1083 /* Initializers. `init' is the entry point. */
1088 { really_start_incremental_init (NULL_TREE); }
1089 initlist_maybe_comma '}'
1090 { $$ = pop_init_level (0); }
1092 { $$ = error_mark_node; }
1095 /* `initlist_maybe_comma' is the guts of an initializer in braces. */
1096 initlist_maybe_comma:
1099 pedwarn ("ANSI C forbids empty initializer braces"); }
1100 | initlist1 maybecomma
1105 | initlist1 ',' initelt
1108 /* `initelt' is a single element of an initializer.
1109 It may use braces. */
1111 designator_list '=' initval
1112 | designator initval
1114 { set_init_label ($1); }
1121 { push_init_level (0); }
1122 initlist_maybe_comma '}'
1123 { process_init_element (pop_init_level (0)); }
1125 { process_init_element ($1); }
1131 | designator_list designator
1136 { set_init_label ($2); }
1137 /* These are for labeled elements. The syntax for an array element
1138 initializer conflicts with the syntax for an Objective-C message,
1139 so don't include these productions in the Objective-C grammar. */
1141 | '[' expr_no_commas ELLIPSIS expr_no_commas ']'
1142 { set_init_index ($2, $4); }
1143 | '[' expr_no_commas ']'
1144 { set_init_index ($2, NULL_TREE); }
1151 pedwarn ("ANSI C forbids nested functions");
1153 push_function_context ();
1154 if (! start_function (current_declspecs, $1,
1155 prefix_attributes, NULL_TREE))
1157 pop_function_context ();
1160 reinit_parse_for_function (); }
1161 old_style_parm_decls
1162 { store_parm_decls (); }
1163 /* This used to use compstmt_or_error.
1164 That caused a bug with input `f(g) int g {}',
1165 where the use of YYERROR1 above caused an error
1166 which then was handled by compstmt_or_error.
1167 There followed a repeated execution of that same rule,
1168 which called YYERROR1 again, and so on. */
1170 { finish_function (1);
1171 pop_function_context (); }
1174 notype_nested_function:
1177 pedwarn ("ANSI C forbids nested functions");
1179 push_function_context ();
1180 if (! start_function (current_declspecs, $1,
1181 prefix_attributes, NULL_TREE))
1183 pop_function_context ();
1186 reinit_parse_for_function (); }
1187 old_style_parm_decls
1188 { store_parm_decls (); }
1189 /* This used to use compstmt_or_error.
1190 That caused a bug with input `f(g) int g {}',
1191 where the use of YYERROR1 above caused an error
1192 which then was handled by compstmt_or_error.
1193 There followed a repeated execution of that same rule,
1194 which called YYERROR1 again, and so on. */
1196 { finish_function (1);
1197 pop_function_context (); }
1200 /* Any kind of declarator (thus, all declarators allowed
1201 after an explicit typespec). */
1204 after_type_declarator
1208 /* A declarator that is allowed only after an explicit typespec. */
1210 after_type_declarator:
1211 '(' after_type_declarator ')'
1213 | after_type_declarator '(' parmlist_or_identifiers %prec '.'
1214 { $$ = build_nt (CALL_EXPR, $1, $3, NULL_TREE); }
1215 /* | after_type_declarator '(' error ')' %prec '.'
1216 { $$ = build_nt (CALL_EXPR, $1, NULL_TREE, NULL_TREE);
1217 poplevel (0, 0, 0); } */
1218 | after_type_declarator '[' expr ']' %prec '.'
1219 { $$ = build_nt (ARRAY_REF, $1, $3); }
1220 | after_type_declarator '[' ']' %prec '.'
1221 { $$ = build_nt (ARRAY_REF, $1, NULL_TREE); }
1222 | '*' type_quals after_type_declarator %prec UNARY
1223 { $$ = make_pointer_declarator ($2, $3); }
1224 /* ??? Yuck. setattrs is a quick hack. We can't use
1225 prefix_attributes because $1 only applies to this
1226 declarator. We assume setspecs has already been done.
1227 setattrs also avoids 5 reduce/reduce conflicts (otherwise multiple
1228 attributes could be recognized here or in `attributes'). */
1229 | attributes setattrs after_type_declarator
1237 /* Kinds of declarator that can appear in a parameter list
1238 in addition to notype_declarator. This is like after_type_declarator
1239 but does not allow a typedef name in parentheses as an identifier
1240 (because it would conflict with a function with that typedef as arg). */
1243 parm_declarator '(' parmlist_or_identifiers %prec '.'
1244 { $$ = build_nt (CALL_EXPR, $1, $3, NULL_TREE); }
1245 /* | parm_declarator '(' error ')' %prec '.'
1246 { $$ = build_nt (CALL_EXPR, $1, NULL_TREE, NULL_TREE);
1247 poplevel (0, 0, 0); } */
1249 | parm_declarator '[' '*' ']' %prec '.'
1250 { $$ = build_nt (ARRAY_REF, $1, NULL_TREE);
1252 error ("`[*]' in parameter declaration only allowed in ISO C 99");
1255 | parm_declarator '[' expr ']' %prec '.'
1256 { $$ = build_nt (ARRAY_REF, $1, $3); }
1257 | parm_declarator '[' ']' %prec '.'
1258 { $$ = build_nt (ARRAY_REF, $1, NULL_TREE); }
1259 | '*' type_quals parm_declarator %prec UNARY
1260 { $$ = make_pointer_declarator ($2, $3); }
1261 /* ??? Yuck. setattrs is a quick hack. We can't use
1262 prefix_attributes because $1 only applies to this
1263 declarator. We assume setspecs has already been done.
1264 setattrs also avoids 5 reduce/reduce conflicts (otherwise multiple
1265 attributes could be recognized here or in `attributes'). */
1266 | attributes setattrs parm_declarator
1271 /* A declarator allowed whether or not there has been
1272 an explicit typespec. These cannot redeclare a typedef-name. */
1275 notype_declarator '(' parmlist_or_identifiers %prec '.'
1276 { $$ = build_nt (CALL_EXPR, $1, $3, NULL_TREE); }
1277 /* | notype_declarator '(' error ')' %prec '.'
1278 { $$ = build_nt (CALL_EXPR, $1, NULL_TREE, NULL_TREE);
1279 poplevel (0, 0, 0); } */
1280 | '(' notype_declarator ')'
1282 | '*' type_quals notype_declarator %prec UNARY
1283 { $$ = make_pointer_declarator ($2, $3); }
1285 | notype_declarator '[' '*' ']' %prec '.'
1286 { $$ = build_nt (ARRAY_REF, $1, NULL_TREE);
1288 error ("`[*]' in parameter declaration only allowed in ISO C 99");
1291 | notype_declarator '[' expr ']' %prec '.'
1292 { $$ = build_nt (ARRAY_REF, $1, $3); }
1293 | notype_declarator '[' ']' %prec '.'
1294 { $$ = build_nt (ARRAY_REF, $1, NULL_TREE); }
1295 /* ??? Yuck. setattrs is a quick hack. We can't use
1296 prefix_attributes because $1 only applies to this
1297 declarator. We assume setspecs has already been done.
1298 setattrs also avoids 5 reduce/reduce conflicts (otherwise multiple
1299 attributes could be recognized here or in `attributes'). */
1300 | attributes setattrs notype_declarator
1327 struct_head identifier '{'
1328 { $$ = start_struct (RECORD_TYPE, $2);
1329 /* Start scope of tag before parsing components. */
1331 component_decl_list '}' maybe_attribute
1332 { $$ = finish_struct ($<ttype>4, $5, chainon ($1, $7)); }
1333 | struct_head '{' component_decl_list '}' maybe_attribute
1334 { $$ = finish_struct (start_struct (RECORD_TYPE, NULL_TREE),
1335 $3, chainon ($1, $5));
1337 | struct_head identifier
1338 { $$ = xref_tag (RECORD_TYPE, $2); }
1339 | union_head identifier '{'
1340 { $$ = start_struct (UNION_TYPE, $2); }
1341 component_decl_list '}' maybe_attribute
1342 { $$ = finish_struct ($<ttype>4, $5, chainon ($1, $7)); }
1343 | union_head '{' component_decl_list '}' maybe_attribute
1344 { $$ = finish_struct (start_struct (UNION_TYPE, NULL_TREE),
1345 $3, chainon ($1, $5));
1347 | union_head identifier
1348 { $$ = xref_tag (UNION_TYPE, $2); }
1349 | enum_head identifier '{'
1350 { $$ = start_enum ($2); }
1351 enumlist maybecomma_warn '}' maybe_attribute
1352 { $$ = finish_enum ($<ttype>4, nreverse ($5),
1353 chainon ($1, $8)); }
1355 { $$ = start_enum (NULL_TREE); }
1356 enumlist maybecomma_warn '}' maybe_attribute
1357 { $$ = finish_enum ($<ttype>3, nreverse ($4),
1358 chainon ($1, $7)); }
1359 | enum_head identifier
1360 { $$ = xref_tag (ENUMERAL_TYPE, $2); }
1371 { if (pedantic && ! flag_isoc99)
1372 pedwarn ("comma at end of enumerator list"); }
1375 component_decl_list:
1376 component_decl_list2
1378 | component_decl_list2 component_decl
1379 { $$ = chainon ($1, $2);
1380 pedwarn ("no semicolon at end of struct or union"); }
1383 component_decl_list2: /* empty */
1385 | component_decl_list2 component_decl ';'
1386 { $$ = chainon ($1, $2); }
1387 | component_decl_list2 ';'
1389 pedwarn ("extra semicolon in struct or union specified"); }
1391 /* foo(sizeof(struct{ @defs(ClassName)})); */
1392 | DEFS '(' CLASSNAME ')'
1394 tree interface = lookup_interface ($3);
1397 $$ = get_class_ivars (interface);
1400 error ("Cannot find interface declaration for `%s'",
1401 IDENTIFIER_POINTER ($3));
1408 /* There is a shift-reduce conflict here, because `components' may
1409 start with a `typename'. It happens that shifting (the default resolution)
1410 does the right thing, because it treats the `typename' as part of
1411 a `typed_typespecs'.
1413 It is possible that this same technique would allow the distinction
1414 between `notype_initdecls' and `initdecls' to be eliminated.
1415 But I am being cautious and not trying it. */
1418 typed_typespecs setspecs components
1420 current_declspecs = TREE_VALUE (declspec_stack);
1421 prefix_attributes = TREE_PURPOSE (declspec_stack);
1422 declspec_stack = TREE_CHAIN (declspec_stack); }
1423 | typed_typespecs setspecs save_filename save_lineno maybe_attribute
1425 /* Support for unnamed structs or unions as members of
1426 structs or unions (which is [a] useful and [b] supports
1429 pedwarn ("ANSI C doesn't support unnamed structs/unions");
1431 $$ = grokfield($3, $4, NULL, current_declspecs, NULL_TREE);
1432 current_declspecs = TREE_VALUE (declspec_stack);
1433 prefix_attributes = TREE_PURPOSE (declspec_stack);
1434 declspec_stack = TREE_CHAIN (declspec_stack);
1436 | nonempty_type_quals setspecs components
1438 current_declspecs = TREE_VALUE (declspec_stack);
1439 prefix_attributes = TREE_PURPOSE (declspec_stack);
1440 declspec_stack = TREE_CHAIN (declspec_stack); }
1441 | nonempty_type_quals
1443 pedwarn ("ANSI C forbids member declarations with no members");
1448 | extension component_decl
1450 RESTORE_WARN_FLAGS ($1); }
1454 component_declarator
1455 | components ',' component_declarator
1456 { $$ = chainon ($1, $3); }
1459 component_declarator:
1460 save_filename save_lineno declarator maybe_attribute
1461 { $$ = grokfield ($1, $2, $3, current_declspecs, NULL_TREE);
1462 decl_attributes ($$, $4, prefix_attributes); }
1463 | save_filename save_lineno
1464 declarator ':' expr_no_commas maybe_attribute
1465 { $$ = grokfield ($1, $2, $3, current_declspecs, $5);
1466 decl_attributes ($$, $6, prefix_attributes); }
1467 | save_filename save_lineno ':' expr_no_commas maybe_attribute
1468 { $$ = grokfield ($1, $2, NULL_TREE, current_declspecs, $4);
1469 decl_attributes ($$, $5, prefix_attributes); }
1472 /* We chain the enumerators in reverse order.
1473 They are put in forward order where enumlist is used.
1474 (The order used to be significant, but no longer is so.
1475 However, we still maintain the order, just to be clean.) */
1479 | enumlist ',' enumerator
1480 { if ($1 == error_mark_node)
1483 $$ = chainon ($3, $1); }
1485 { $$ = error_mark_node; }
1491 { $$ = build_enumerator ($1, NULL_TREE); }
1492 | identifier '=' expr_no_commas
1493 { $$ = build_enumerator ($1, $3); }
1497 typed_typespecs absdcl
1498 { $$ = build_tree_list ($1, $2); }
1499 | nonempty_type_quals absdcl
1500 { $$ = build_tree_list ($1, $2); }
1503 absdcl: /* an absolute declarator */
1509 nonempty_type_quals:
1511 { $$ = tree_cons (NULL_TREE, $1, NULL_TREE); }
1512 | nonempty_type_quals TYPE_QUAL
1513 { $$ = tree_cons (NULL_TREE, $2, $1); }
1519 | type_quals TYPE_QUAL
1520 { $$ = tree_cons (NULL_TREE, $2, $1); }
1523 absdcl1: /* a nonempty absolute declarator */
1526 /* `(typedef)1' is `int'. */
1527 | '*' type_quals absdcl1 %prec UNARY
1528 { $$ = make_pointer_declarator ($2, $3); }
1529 | '*' type_quals %prec UNARY
1530 { $$ = make_pointer_declarator ($2, NULL_TREE); }
1531 | absdcl1 '(' parmlist %prec '.'
1532 { $$ = build_nt (CALL_EXPR, $1, $3, NULL_TREE); }
1533 | absdcl1 '[' expr ']' %prec '.'
1534 { $$ = build_nt (ARRAY_REF, $1, $3); }
1535 | absdcl1 '[' ']' %prec '.'
1536 { $$ = build_nt (ARRAY_REF, $1, NULL_TREE); }
1537 | '(' parmlist %prec '.'
1538 { $$ = build_nt (CALL_EXPR, NULL_TREE, $2, NULL_TREE); }
1539 | '[' expr ']' %prec '.'
1540 { $$ = build_nt (ARRAY_REF, NULL_TREE, $2); }
1542 { $$ = build_nt (ARRAY_REF, NULL_TREE, NULL_TREE); }
1543 /* ??? It appears we have to support attributes here, however
1544 using prefix_attributes is wrong. */
1545 | attributes setattrs absdcl1
1549 /* at least one statement, the first of which parses without error. */
1550 /* stmts is used only after decls, so an invalid first statement
1551 is actually regarded as an invalid decl and part of the decls. */
1554 lineno_stmt_or_labels
1557 pedwarn ("ANSI C forbids label at end of compound statement");
1561 lineno_stmt_or_labels:
1562 lineno_stmt_or_label
1563 | lineno_stmt_or_labels lineno_stmt_or_label
1565 | lineno_stmt_or_labels errstmt
1577 pushlevel: /* empty */
1578 { emit_line_note (input_filename, lineno);
1581 expand_start_bindings (0);
1583 if (objc_method_context)
1589 /* Read zero or more forward-declarations for labels
1590 that nested functions can jump to. */
1595 pedwarn ("ANSI C forbids label declarations"); }
1600 | label_decls label_decl
1604 LABEL identifiers_or_typenames ';'
1606 for (link = $2; link; link = TREE_CHAIN (link))
1608 tree label = shadow_label (TREE_VALUE (link));
1609 C_DECLARED_LABEL_FLAG (label) = 1;
1610 declare_nonlocal_label (label);
1615 /* This is the body of a function definition.
1616 It causes syntax errors to ignore to the next openbrace. */
1623 compstmt_start: '{' { compstmt_count++; }
1625 compstmt_nostart: '}'
1626 { $$ = convert (void_type_node, integer_zero_node); }
1627 | pushlevel maybe_label_decls decls xstmts '}'
1628 { emit_line_note (input_filename, lineno);
1629 expand_end_bindings (getdecls (), 1, 0);
1630 $$ = poplevel (1, 1, 0); }
1631 | pushlevel maybe_label_decls error '}'
1632 { emit_line_note (input_filename, lineno);
1633 expand_end_bindings (getdecls (), kept_level_p (), 0);
1634 $$ = poplevel (kept_level_p (), 0, 0); }
1635 | pushlevel maybe_label_decls stmts '}'
1636 { emit_line_note (input_filename, lineno);
1637 expand_end_bindings (getdecls (), kept_level_p (), 0);
1638 $$ = poplevel (kept_level_p (), 0, 0); }
1641 compstmt_primary_start:
1643 { if (current_function_decl == 0)
1645 error ("braced-group within expression allowed only inside a function");
1648 /* We must force a BLOCK for this level
1649 so that, if it is not expanded later,
1650 there is a way to turn off the entire subtree of blocks
1651 that are contained in it. */
1653 push_iterator_stack ();
1654 push_label_level ();
1655 $$ = expand_start_stmt_expr ();
1659 compstmt: compstmt_start compstmt_nostart
1663 /* Value is number of statements counted as of the closeparen. */
1665 if_prefix lineno_labeled_stmt
1666 /* Make sure c_expand_end_cond is run once
1667 for each call to c_expand_start_cond.
1668 Otherwise a crash is likely. */
1674 { emit_line_note ($<filename>-1, $<lineno>0);
1675 c_expand_start_cond (truthvalue_conversion ($3), 0,
1677 $<itype>$ = stmt_count;
1678 if_stmt_file = $<filename>-1;
1679 if_stmt_line = $<lineno>0;
1680 position_after_white_space (); }
1683 /* This is a subroutine of stmt.
1684 It is used twice, once for valid DO statements
1685 and once for catching errors in parsing the end test. */
1690 emit_line_note ($<filename>-1, $<lineno>0);
1691 /* See comment in `while' alternative, above. */
1693 expand_start_loop_continue_elsewhere (1);
1694 position_after_white_space (); }
1695 lineno_labeled_stmt WHILE
1696 { expand_loop_continue_here (); }
1700 { $$ = input_filename; }
1707 lineno_labeled_stmt:
1708 save_filename save_lineno stmt
1710 /* | save_filename save_lineno error
1713 | save_filename save_lineno label lineno_labeled_stmt
1717 lineno_stmt_or_label:
1718 save_filename save_lineno stmt_or_label
1729 /* Parse a single real statement, not including any labels. */
1736 emit_line_note ($<filename>-1, $<lineno>0);
1737 /* It appears that this should not be done--that a non-lvalue array
1738 shouldn't get an error if the value isn't used.
1739 Section 3.2.2.1 says that an array lvalue gets converted to a pointer
1740 if it appears as a top-level expression,
1741 but says nothing about non-lvalue arrays. */
1743 /* Call default_conversion to get an error
1744 on referring to a register array if pedantic. */
1745 if (TREE_CODE (TREE_TYPE ($1)) == ARRAY_TYPE
1746 || TREE_CODE (TREE_TYPE ($1)) == FUNCTION_TYPE)
1747 $1 = default_conversion ($1);
1749 iterator_expand ($1); }
1751 { c_expand_start_else ();
1752 $<itype>1 = stmt_count;
1753 position_after_white_space (); }
1755 { c_expand_end_cond ();
1756 if (extra_warnings && stmt_count == $<itype>1)
1757 warning ("empty body in an else-statement"); }
1758 | simple_if %prec IF
1759 { c_expand_end_cond ();
1760 /* This warning is here instead of in simple_if, because we
1761 do not want a warning if an empty if is followed by an
1762 else statement. Increment stmt_count so we don't
1763 give a second error if this is a nested `if'. */
1764 if (extra_warnings && stmt_count++ == $<itype>1)
1765 warning_with_file_and_line (if_stmt_file, if_stmt_line,
1766 "empty body in an if-statement"); }
1767 /* Make sure c_expand_end_cond is run once
1768 for each call to c_expand_start_cond.
1769 Otherwise a crash is likely. */
1770 | simple_if ELSE error
1771 { c_expand_end_cond (); }
1774 emit_line_note ($<filename>-1, $<lineno>0);
1775 /* The emit_nop used to come before emit_line_note,
1776 but that made the nop seem like part of the preceding line.
1777 And that was confusing when the preceding line was
1778 inside of an if statement and was not really executed.
1779 I think it ought to work to put the nop after the line number.
1780 We will see. --rms, July 15, 1991. */
1783 { /* Don't start the loop till we have succeeded
1784 in parsing the end test. This is to make sure
1785 that we end every loop we start. */
1786 expand_start_loop (1);
1787 emit_line_note (input_filename, lineno);
1788 expand_exit_loop_if_false (NULL_PTR,
1789 truthvalue_conversion ($4));
1790 position_after_white_space (); }
1792 { expand_end_loop (); }
1795 { emit_line_note (input_filename, lineno);
1796 expand_exit_loop_if_false (NULL_PTR,
1797 truthvalue_conversion ($3));
1798 expand_end_loop (); }
1799 /* This rule is needed to make sure we end every loop we start. */
1800 | do_stmt_start error
1801 { expand_end_loop (); }
1805 emit_line_note ($<filename>-1, $<lineno>0);
1806 /* See comment in `while' alternative, above. */
1808 if ($3) c_expand_expr_stmt ($3);
1809 /* Next step is to call expand_start_loop_continue_elsewhere,
1810 but wait till after we parse the entire for (...).
1811 Otherwise, invalid input might cause us to call that
1812 fn without calling expand_end_loop. */
1815 /* Can't emit now; wait till after expand_start_loop... */
1816 { $<lineno>7 = lineno;
1817 $<filename>$ = input_filename; }
1820 /* Start the loop. Doing this after parsing
1821 all the expressions ensures we will end the loop. */
1822 expand_start_loop_continue_elsewhere (1);
1823 /* Emit the end-test, with a line number. */
1824 emit_line_note ($<filename>8, $<lineno>7);
1826 expand_exit_loop_if_false (NULL_PTR,
1827 truthvalue_conversion ($6));
1828 $<lineno>7 = lineno;
1829 $<filename>8 = input_filename;
1830 position_after_white_space (); }
1832 { /* Emit the increment expression, with a line number. */
1833 emit_line_note ($<filename>8, $<lineno>7);
1834 expand_loop_continue_here ();
1836 c_expand_expr_stmt ($9);
1837 expand_end_loop (); }
1838 | SWITCH '(' expr ')'
1840 emit_line_note ($<filename>-1, $<lineno>0);
1841 c_expand_start_case ($3);
1842 position_after_white_space (); }
1844 { expand_end_case ($3); }
1847 emit_line_note ($<filename>-1, $<lineno>0);
1848 if ( ! expand_exit_something ())
1849 error ("break statement not within loop or switch"); }
1852 emit_line_note ($<filename>-1, $<lineno>0);
1853 if (! expand_continue_loop (NULL_PTR))
1854 error ("continue statement not within a loop"); }
1857 emit_line_note ($<filename>-1, $<lineno>0);
1858 c_expand_return (NULL_TREE); }
1861 emit_line_note ($<filename>-1, $<lineno>0);
1862 c_expand_return ($2); }
1863 | ASM_KEYWORD maybe_type_qual '(' expr ')' ';'
1865 emit_line_note ($<filename>-1, $<lineno>0);
1867 if ((TREE_CODE ($4) == ADDR_EXPR
1868 && TREE_CODE (TREE_OPERAND ($4, 0)) == STRING_CST)
1869 || TREE_CODE ($4) == STRING_CST)
1872 error ("argument of `asm' is not a constant string"); }
1873 /* This is the case with just output operands. */
1874 | ASM_KEYWORD maybe_type_qual '(' expr ':' asm_operands ')' ';'
1876 emit_line_note ($<filename>-1, $<lineno>0);
1877 c_expand_asm_operands ($4, $6, NULL_TREE, NULL_TREE,
1878 $2 == ridpointers[(int)RID_VOLATILE],
1879 input_filename, lineno); }
1880 /* This is the case with input operands as well. */
1881 | ASM_KEYWORD maybe_type_qual '(' expr ':' asm_operands ':' asm_operands ')' ';'
1883 emit_line_note ($<filename>-1, $<lineno>0);
1884 c_expand_asm_operands ($4, $6, $8, NULL_TREE,
1885 $2 == ridpointers[(int)RID_VOLATILE],
1886 input_filename, lineno); }
1887 /* This is the case with clobbered registers as well. */
1888 | ASM_KEYWORD maybe_type_qual '(' expr ':' asm_operands ':'
1889 asm_operands ':' asm_clobbers ')' ';'
1891 emit_line_note ($<filename>-1, $<lineno>0);
1892 c_expand_asm_operands ($4, $6, $8, $10,
1893 $2 == ridpointers[(int)RID_VOLATILE],
1894 input_filename, lineno); }
1895 | GOTO identifier ';'
1898 emit_line_note ($<filename>-1, $<lineno>0);
1899 decl = lookup_label ($2);
1902 TREE_USED (decl) = 1;
1908 pedwarn ("ANSI C forbids `goto *expr;'");
1910 emit_line_note ($<filename>-1, $<lineno>0);
1911 expand_computed_goto (convert (ptr_type_node, $3)); }
1916 all_iter_stmt_simple
1917 /* | all_iter_stmt_with_decl */
1920 all_iter_stmt_simple:
1923 /* The value returned by this action is */
1924 /* 1 if everything is OK */
1925 /* 0 in case of error or already bound iterator */
1928 if (TREE_CODE ($3) != VAR_DECL)
1929 error ("invalid `for (ITERATOR)' syntax");
1930 else if (! ITERATOR_P ($3))
1931 error ("`%s' is not an iterator",
1932 IDENTIFIER_POINTER (DECL_NAME ($3)));
1933 else if (ITERATOR_BOUND_P ($3))
1934 error ("`for (%s)' inside expansion of same iterator",
1935 IDENTIFIER_POINTER (DECL_NAME ($3)));
1939 iterator_for_loop_start ($3);
1945 iterator_for_loop_end ($3);
1948 /* This really should allow any kind of declaration,
1949 for generality. Fix it before turning it back on.
1951 all_iter_stmt_with_decl:
1952 FOR '(' ITERATOR pushlevel setspecs iterator_spec ')'
1954 */ /* The value returned by this action is */
1955 /* 1 if everything is OK */
1956 /* 0 in case of error or already bound iterator */
1958 iterator_for_loop_start ($6);
1962 iterator_for_loop_end ($6);
1963 emit_line_note (input_filename, lineno);
1964 expand_end_bindings (getdecls (), 1, 0);
1965 $<ttype>$ = poplevel (1, 1, 0);
1969 /* Any kind of label, including jump labels and case labels.
1970 ANSI C accepts labels only before statements, but we allow them
1971 also at the end of a compound statement. */
1973 label: CASE expr_no_commas ':'
1974 { register tree value = check_case_value ($2);
1976 = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE);
1980 if (value != error_mark_node)
1985 if (pedantic && ! INTEGRAL_TYPE_P (TREE_TYPE (value)))
1986 pedwarn ("label must have integral type in ANSI C");
1988 success = pushcase (value, convert_and_check,
1992 error ("case label not within a switch statement");
1993 else if (success == 2)
1995 error ("duplicate case value");
1996 error_with_decl (duplicate, "this is the first entry for that value");
1998 else if (success == 3)
1999 warning ("case value out of range");
2000 else if (success == 5)
2001 error ("case label within scope of cleanup or variable array");
2003 position_after_white_space (); }
2004 | CASE expr_no_commas ELLIPSIS expr_no_commas ':'
2005 { register tree value1 = check_case_value ($2);
2006 register tree value2 = check_case_value ($4);
2008 = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE);
2011 pedwarn ("ANSI C forbids case ranges");
2014 if (value1 != error_mark_node && value2 != error_mark_node)
2017 int success = pushcase_range (value1, value2,
2018 convert_and_check, label,
2021 error ("case label not within a switch statement");
2022 else if (success == 2)
2024 error ("duplicate case value");
2025 error_with_decl (duplicate, "this is the first entry for that value");
2027 else if (success == 3)
2028 warning ("case value out of range");
2029 else if (success == 4)
2030 warning ("empty case range");
2031 else if (success == 5)
2032 error ("case label within scope of cleanup or variable array");
2034 position_after_white_space (); }
2039 = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE);
2040 int success = pushcase (NULL_TREE, 0, label, &duplicate);
2043 error ("default label not within a switch statement");
2044 else if (success == 2)
2046 error ("multiple default labels in one switch");
2047 error_with_decl (duplicate, "this is the first default label");
2049 position_after_white_space (); }
2050 | identifier ':' maybe_attribute
2051 { tree label = define_label (input_filename, lineno, $1);
2056 expand_label (label);
2057 decl_attributes (label, $3, NULL_TREE);
2059 position_after_white_space (); }
2062 /* Either a type-qualifier or nothing. First thing in an `asm' statement. */
2066 { emit_line_note (input_filename, lineno);
2069 { emit_line_note (input_filename, lineno); }
2078 /* These are the operands other than the first string and colon
2079 in asm ("addextend %2,%1": "=dm" (x), "0" (y), "g" (*x)) */
2080 asm_operands: /* empty */
2082 | nonnull_asm_operands
2085 nonnull_asm_operands:
2087 | nonnull_asm_operands ',' asm_operand
2088 { $$ = chainon ($1, $3); }
2093 { $$ = build_tree_list ($1, $3); }
2098 { $$ = tree_cons (NULL_TREE, combine_strings ($1), NULL_TREE); }
2099 | asm_clobbers ',' string
2100 { $$ = tree_cons (NULL_TREE, combine_strings ($3), $1); }
2103 /* This is what appears inside the parens in a function declarator.
2104 Its value is a list of ..._TYPE nodes. */
2107 clear_parm_order ();
2108 declare_parm_level (0); }
2111 parmlist_tags_warning ();
2112 poplevel (0, 0, 0); }
2120 pedwarn ("ANSI C forbids forward parameter declarations");
2121 /* Mark the forward decls as such. */
2122 for (parm = getdecls (); parm; parm = TREE_CHAIN (parm))
2123 TREE_ASM_WRITTEN (parm) = 1;
2124 clear_parm_order (); }
2128 { $$ = tree_cons (NULL_TREE, NULL_TREE, NULL_TREE); }
2131 /* This is what appears inside the parens in a function declarator.
2132 Is value is represented in the format that grokdeclarator expects. */
2133 parmlist_2: /* empty */
2134 { $$ = get_parm_info (0); }
2136 { $$ = get_parm_info (0);
2137 /* Gcc used to allow this as an extension. However, it does
2138 not work for all targets, and thus has been disabled.
2139 Also, since func (...) and func () are indistinguishable,
2140 it caused problems with the code in expand_builtin which
2141 tries to verify that BUILT_IN_NEXT_ARG is being used
2143 error ("ANSI C requires a named argument before `...'");
2146 { $$ = get_parm_info (1); }
2147 | parms ',' ELLIPSIS
2148 { $$ = get_parm_info (0); }
2153 { push_parm_decl ($1); }
2155 { push_parm_decl ($3); }
2158 /* A single parameter declaration or parameter type name,
2159 as found in a parmlist. */
2161 typed_declspecs setspecs parm_declarator maybe_attribute
2162 { $$ = build_tree_list (build_tree_list (current_declspecs,
2164 build_tree_list (prefix_attributes,
2166 current_declspecs = TREE_VALUE (declspec_stack);
2167 prefix_attributes = TREE_PURPOSE (declspec_stack);
2168 declspec_stack = TREE_CHAIN (declspec_stack); }
2169 | typed_declspecs setspecs notype_declarator maybe_attribute
2170 { $$ = build_tree_list (build_tree_list (current_declspecs,
2172 build_tree_list (prefix_attributes,
2174 current_declspecs = TREE_VALUE (declspec_stack);
2175 prefix_attributes = TREE_PURPOSE (declspec_stack);
2176 declspec_stack = TREE_CHAIN (declspec_stack); }
2177 | typed_declspecs setspecs absdcl maybe_attribute
2178 { $$ = build_tree_list (build_tree_list (current_declspecs,
2180 build_tree_list (prefix_attributes,
2182 current_declspecs = TREE_VALUE (declspec_stack);
2183 prefix_attributes = TREE_PURPOSE (declspec_stack);
2184 declspec_stack = TREE_CHAIN (declspec_stack); }
2185 | declmods setspecs notype_declarator maybe_attribute
2186 { $$ = build_tree_list (build_tree_list (current_declspecs,
2188 build_tree_list (prefix_attributes,
2190 current_declspecs = TREE_VALUE (declspec_stack);
2191 prefix_attributes = TREE_PURPOSE (declspec_stack);
2192 declspec_stack = TREE_CHAIN (declspec_stack); }
2194 | declmods setspecs absdcl maybe_attribute
2195 { $$ = build_tree_list (build_tree_list (current_declspecs,
2197 build_tree_list (prefix_attributes,
2199 current_declspecs = TREE_VALUE (declspec_stack);
2200 prefix_attributes = TREE_PURPOSE (declspec_stack);
2201 declspec_stack = TREE_CHAIN (declspec_stack); }
2204 /* This is used in a function definition
2205 where either a parmlist or an identifier list is ok.
2206 Its value is a list of ..._TYPE nodes or a list of identifiers. */
2207 parmlist_or_identifiers:
2209 clear_parm_order ();
2210 declare_parm_level (1); }
2211 parmlist_or_identifiers_1
2213 parmlist_tags_warning ();
2214 poplevel (0, 0, 0); }
2217 parmlist_or_identifiers_1:
2221 for (t = $1; t; t = TREE_CHAIN (t))
2222 if (TREE_VALUE (t) == NULL_TREE)
2223 error ("`...' in old-style identifier list");
2224 $$ = tree_cons (NULL_TREE, NULL_TREE, $1); }
2227 /* A nonempty list of identifiers. */
2230 { $$ = build_tree_list (NULL_TREE, $1); }
2231 | identifiers ',' IDENTIFIER
2232 { $$ = chainon ($1, build_tree_list (NULL_TREE, $3)); }
2235 /* A nonempty list of identifiers, including typenames. */
2236 identifiers_or_typenames:
2238 { $$ = build_tree_list (NULL_TREE, $1); }
2239 | identifiers_or_typenames ',' identifier
2240 { $$ = chainon ($1, build_tree_list (NULL_TREE, $3)); }
2245 { $$ = SAVE_WARN_FLAGS();
2247 warn_pointer_arith = 0; }
2251 /* Objective-C productions. */
2261 if (objc_implementation_context)
2263 finish_class (objc_implementation_context);
2264 objc_ivar_chain = NULL_TREE;
2265 objc_implementation_context = NULL_TREE;
2268 warning ("`@end' must appear in an implementation context");
2272 /* A nonempty list of identifiers. */
2275 { $$ = build_tree_list (NULL_TREE, $1); }
2276 | identifier_list ',' identifier
2277 { $$ = chainon ($1, build_tree_list (NULL_TREE, $3)); }
2281 CLASS identifier_list ';'
2283 objc_declare_class ($2);
2287 ALIAS identifier identifier ';'
2289 objc_declare_alias ($2, $3);
2293 INTERFACE identifier protocolrefs '{'
2295 objc_interface_context = objc_ivar_context
2296 = start_class (CLASS_INTERFACE_TYPE, $2, NULL_TREE, $3);
2297 objc_public_flag = 0;
2301 continue_class (objc_interface_context);
2306 finish_class (objc_interface_context);
2307 objc_interface_context = NULL_TREE;
2310 | INTERFACE identifier protocolrefs
2312 objc_interface_context
2313 = start_class (CLASS_INTERFACE_TYPE, $2, NULL_TREE, $3);
2314 continue_class (objc_interface_context);
2319 finish_class (objc_interface_context);
2320 objc_interface_context = NULL_TREE;
2323 | INTERFACE identifier ':' identifier protocolrefs '{'
2325 objc_interface_context = objc_ivar_context
2326 = start_class (CLASS_INTERFACE_TYPE, $2, $4, $5);
2327 objc_public_flag = 0;
2331 continue_class (objc_interface_context);
2336 finish_class (objc_interface_context);
2337 objc_interface_context = NULL_TREE;
2340 | INTERFACE identifier ':' identifier protocolrefs
2342 objc_interface_context
2343 = start_class (CLASS_INTERFACE_TYPE, $2, $4, $5);
2344 continue_class (objc_interface_context);
2349 finish_class (objc_interface_context);
2350 objc_interface_context = NULL_TREE;
2353 | IMPLEMENTATION identifier '{'
2355 objc_implementation_context = objc_ivar_context
2356 = start_class (CLASS_IMPLEMENTATION_TYPE, $2, NULL_TREE, NULL_TREE);
2357 objc_public_flag = 0;
2362 = continue_class (objc_implementation_context);
2365 | IMPLEMENTATION identifier
2367 objc_implementation_context
2368 = start_class (CLASS_IMPLEMENTATION_TYPE, $2, NULL_TREE, NULL_TREE);
2370 = continue_class (objc_implementation_context);
2373 | IMPLEMENTATION identifier ':' identifier '{'
2375 objc_implementation_context = objc_ivar_context
2376 = start_class (CLASS_IMPLEMENTATION_TYPE, $2, $4, NULL_TREE);
2377 objc_public_flag = 0;
2382 = continue_class (objc_implementation_context);
2385 | IMPLEMENTATION identifier ':' identifier
2387 objc_implementation_context
2388 = start_class (CLASS_IMPLEMENTATION_TYPE, $2, $4, NULL_TREE);
2390 = continue_class (objc_implementation_context);
2393 | INTERFACE identifier '(' identifier ')' protocolrefs
2395 objc_interface_context
2396 = start_class (CATEGORY_INTERFACE_TYPE, $2, $4, $6);
2397 continue_class (objc_interface_context);
2402 finish_class (objc_interface_context);
2403 objc_interface_context = NULL_TREE;
2406 | IMPLEMENTATION identifier '(' identifier ')'
2408 objc_implementation_context
2409 = start_class (CATEGORY_IMPLEMENTATION_TYPE, $2, $4, NULL_TREE);
2411 = continue_class (objc_implementation_context);
2416 PROTOCOL identifier protocolrefs
2418 remember_protocol_qualifiers ();
2419 objc_interface_context
2420 = start_protocol(PROTOCOL_INTERFACE_TYPE, $2, $3);
2424 forget_protocol_qualifiers();
2425 finish_protocol(objc_interface_context);
2426 objc_interface_context = NULL_TREE;
2435 | non_empty_protocolrefs
2438 non_empty_protocolrefs:
2439 ARITHCOMPARE identifier_list ARITHCOMPARE
2441 if ($1 == LT_EXPR && $3 == GT_EXPR)
2449 ivar_decl_list visibility_spec ivar_decls
2454 PRIVATE { objc_public_flag = 2; }
2455 | PROTECTED { objc_public_flag = 0; }
2456 | PUBLIC { objc_public_flag = 1; }
2464 | ivar_decls ivar_decl ';'
2468 pedwarn ("extra semicolon in struct or union specified");
2473 /* There is a shift-reduce conflict here, because `components' may
2474 start with a `typename'. It happens that shifting (the default resolution)
2475 does the right thing, because it treats the `typename' as part of
2476 a `typed_typespecs'.
2478 It is possible that this same technique would allow the distinction
2479 between `notype_initdecls' and `initdecls' to be eliminated.
2480 But I am being cautious and not trying it. */
2483 typed_typespecs setspecs ivars
2485 current_declspecs = TREE_VALUE (declspec_stack);
2486 prefix_attributes = TREE_PURPOSE (declspec_stack);
2487 declspec_stack = TREE_CHAIN (declspec_stack); }
2488 | nonempty_type_quals setspecs ivars
2490 current_declspecs = TREE_VALUE (declspec_stack);
2491 prefix_attributes = TREE_PURPOSE (declspec_stack);
2492 declspec_stack = TREE_CHAIN (declspec_stack); }
2501 | ivars ',' ivar_declarator
2507 $$ = add_instance_variable (objc_ivar_context,
2509 $1, current_declspecs,
2512 | declarator ':' expr_no_commas
2514 $$ = add_instance_variable (objc_ivar_context,
2516 $1, current_declspecs, $3);
2518 | ':' expr_no_commas
2520 $$ = add_instance_variable (objc_ivar_context,
2523 current_declspecs, $2);
2530 remember_protocol_qualifiers ();
2531 if (objc_implementation_context)
2532 objc_inherit_code = CLASS_METHOD_DECL;
2534 fatal ("method definition not in class context");
2538 forget_protocol_qualifiers ();
2539 add_class_method (objc_implementation_context, $3);
2540 start_method_def ($3);
2541 objc_method_context = $3;
2545 continue_method_def ();
2549 finish_method_def ();
2550 objc_method_context = NULL_TREE;
2555 remember_protocol_qualifiers ();
2556 if (objc_implementation_context)
2557 objc_inherit_code = INSTANCE_METHOD_DECL;
2559 fatal ("method definition not in class context");
2563 forget_protocol_qualifiers ();
2564 add_instance_method (objc_implementation_context, $3);
2565 start_method_def ($3);
2566 objc_method_context = $3;
2570 continue_method_def ();
2574 finish_method_def ();
2575 objc_method_context = NULL_TREE;
2579 /* the reason for the strange actions in this rule
2580 is so that notype_initdecls when reached via datadef
2581 can find a valid list of type and sc specs in $0. */
2585 | {$<ttype>$ = NULL_TREE; } methodprotolist2
2588 methodprotolist2: /* eliminates a shift/reduce conflict */
2591 | methodprotolist2 methodproto
2592 | methodprotolist2 {$<ttype>$ = NULL_TREE; } datadef
2603 /* Remember protocol qualifiers in prototypes. */
2604 remember_protocol_qualifiers ();
2605 objc_inherit_code = CLASS_METHOD_DECL;
2609 /* Forget protocol qualifiers here. */
2610 forget_protocol_qualifiers ();
2611 add_class_method (objc_interface_context, $3);
2617 /* Remember protocol qualifiers in prototypes. */
2618 remember_protocol_qualifiers ();
2619 objc_inherit_code = INSTANCE_METHOD_DECL;
2623 /* Forget protocol qualifiers here. */
2624 forget_protocol_qualifiers ();
2625 add_instance_method (objc_interface_context, $3);
2631 '(' typename ')' unaryselector
2633 $$ = build_method_decl (objc_inherit_code, $2, $4, NULL_TREE);
2638 $$ = build_method_decl (objc_inherit_code, NULL_TREE, $1, NULL_TREE);
2641 | '(' typename ')' keywordselector optparmlist
2643 $$ = build_method_decl (objc_inherit_code, $2, $4, $5);
2646 | keywordselector optparmlist
2648 $$ = build_method_decl (objc_inherit_code, NULL_TREE, $1, $2);
2652 /* "optarglist" assumes that start_method_def has already been called...
2653 if it is not, the "xdecls" will not be placed in the proper scope */
2660 /* to get around the following situation: "int foo (int a) int b; {}" that
2661 is synthesized when parsing "- a:a b:b; id c; id d; { ... }" */
2676 typed_declspecs setspecs myparms ';'
2677 { current_declspecs = TREE_VALUE (declspec_stack);
2678 prefix_attributes = TREE_PURPOSE (declspec_stack);
2679 declspec_stack = TREE_CHAIN (declspec_stack); }
2680 | typed_declspecs ';'
2681 { shadow_tag ($1); }
2683 { pedwarn ("empty declaration"); }
2688 { push_parm_decl ($1); }
2689 | myparms ',' myparm
2690 { push_parm_decl ($3); }
2693 /* A single parameter declaration or parameter type name,
2694 as found in a parmlist. DOES NOT ALLOW AN INITIALIZER OR ASMSPEC */
2697 parm_declarator maybe_attribute
2698 { $$ = build_tree_list (build_tree_list (current_declspecs,
2700 build_tree_list (prefix_attributes,
2702 | notype_declarator maybe_attribute
2703 { $$ = build_tree_list (build_tree_list (current_declspecs,
2705 build_tree_list (prefix_attributes,
2707 | absdcl maybe_attribute
2708 { $$ = build_tree_list (build_tree_list (current_declspecs,
2710 build_tree_list (prefix_attributes,
2721 /* oh what a kludge! */
2722 $$ = objc_ellipsis_node;
2730 /* returns a tree list node generated by get_parm_info */
2743 | keywordselector keyworddecl
2745 $$ = chainon ($1, $2);
2757 ENUM { $$ = get_identifier (token_buffer); }
2758 | STRUCT { $$ = get_identifier (token_buffer); }
2759 | UNION { $$ = get_identifier (token_buffer); }
2760 | IF { $$ = get_identifier (token_buffer); }
2761 | ELSE { $$ = get_identifier (token_buffer); }
2762 | WHILE { $$ = get_identifier (token_buffer); }
2763 | DO { $$ = get_identifier (token_buffer); }
2764 | FOR { $$ = get_identifier (token_buffer); }
2765 | SWITCH { $$ = get_identifier (token_buffer); }
2766 | CASE { $$ = get_identifier (token_buffer); }
2767 | DEFAULT { $$ = get_identifier (token_buffer); }
2768 | BREAK { $$ = get_identifier (token_buffer); }
2769 | CONTINUE { $$ = get_identifier (token_buffer); }
2770 | RETURN { $$ = get_identifier (token_buffer); }
2771 | GOTO { $$ = get_identifier (token_buffer); }
2772 | ASM_KEYWORD { $$ = get_identifier (token_buffer); }
2773 | SIZEOF { $$ = get_identifier (token_buffer); }
2774 | TYPEOF { $$ = get_identifier (token_buffer); }
2775 | ALIGNOF { $$ = get_identifier (token_buffer); }
2776 | TYPESPEC | TYPE_QUAL
2780 selector ':' '(' typename ')' identifier
2782 $$ = build_keyword_decl ($1, $4, $6);
2785 | selector ':' identifier
2787 $$ = build_keyword_decl ($1, NULL_TREE, $3);
2790 | ':' '(' typename ')' identifier
2792 $$ = build_keyword_decl (NULL_TREE, $3, $5);
2797 $$ = build_keyword_decl (NULL_TREE, NULL_TREE, $2);
2808 | keywordarglist keywordarg
2810 $$ = chainon ($1, $2);
2818 if (TREE_CHAIN ($1) == NULL_TREE)
2819 /* just return the expr., remove a level of indirection */
2820 $$ = TREE_VALUE ($1);
2822 /* we have a comma expr., we will collapse later */
2828 selector ':' keywordexpr
2830 $$ = build_tree_list ($1, $3);
2834 $$ = build_tree_list (NULL_TREE, $2);
2842 $$ = get_class_reference ($1);
2848 { objc_receiver_context = 1; }
2850 { objc_receiver_context = 0; }
2853 $$ = build_tree_list ($3, $5);
2864 | keywordnamelist keywordname
2866 $$ = chainon ($1, $2);
2873 $$ = build_tree_list ($1, NULL_TREE);
2877 $$ = build_tree_list (NULL_TREE, NULL_TREE);
2882 SELECTOR '(' selectorarg ')'
2889 PROTOCOL '(' identifier ')'
2895 /* extension to support C-structures in the archiver */
2898 ENCODE '(' typename ')'
2900 $$ = groktypename ($3);