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 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 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 /* 1 if we explained undeclared var errors. */
230 static int undeclared_variable_notice;
232 /* For __extension__, save/restore the warning flags which are
233 controlled by __extension__. */
234 #define SAVE_WARN_FLAGS() \
235 size_int (pedantic | (warn_pointer_arith << 1))
236 #define RESTORE_WARN_FLAGS(tval) \
238 int val = tree_low_cst (tval, 0); \
239 pedantic = val & 1; \
240 warn_pointer_arith = (val >> 1) & 1; \
244 /* Objective-C specific information */
246 tree objc_interface_context;
247 tree objc_implementation_context;
248 tree objc_method_context;
249 tree objc_ivar_chain;
250 tree objc_ivar_context;
251 enum tree_code objc_inherit_code;
252 int objc_receiver_context;
253 int objc_public_flag;
257 /* Tell yyparse how to print a token's value, if yydebug is set. */
259 #define YYPRINT(FILE,YYCHAR,YYLVAL) yyprint(FILE,YYCHAR,YYLVAL)
260 extern void yyprint PARAMS ((FILE *, int, YYSTYPE));
262 /* Add GC roots for variables local to this file. */
266 ggc_add_tree_root (&declspec_stack, 1);
267 ggc_add_tree_root (¤t_declspecs, 1);
268 ggc_add_tree_root (&prefix_attributes, 1);
270 ggc_add_tree_root (&objc_interface_context, 1);
271 ggc_add_tree_root (&objc_implementation_context, 1);
272 ggc_add_tree_root (&objc_method_context, 1);
273 ggc_add_tree_root (&objc_ivar_chain, 1);
274 ggc_add_tree_root (&objc_ivar_context, 1);
283 pedwarn ("ANSI C forbids an empty source file");
288 /* In case there were missing closebraces,
289 get us back to the global binding level. */
290 while (! global_bindings_p ())
296 /* the reason for the strange actions in this rule
297 is so that notype_initdecls when reached via datadef
298 can find a valid list of type and sc specs in $0. */
301 {$<ttype>$ = NULL_TREE; } extdef
302 | extdefs {$<ttype>$ = NULL_TREE; } extdef
311 | ASM_KEYWORD '(' expr ')' ';'
313 if ((TREE_CODE ($3) == ADDR_EXPR
314 && TREE_CODE (TREE_OPERAND ($3, 0)) == STRING_CST)
315 || TREE_CODE ($3) == STRING_CST)
318 error ("argument of `asm' is not a constant string"); }
320 { RESTORE_WARN_FLAGS ($1); }
324 setspecs notype_initdecls ';'
326 error ("ANSI C forbids data definition with no type or storage class");
327 else if (!flag_traditional)
328 warning ("data definition has no type or storage class");
330 current_declspecs = TREE_VALUE (declspec_stack);
331 prefix_attributes = TREE_PURPOSE (declspec_stack);
332 declspec_stack = TREE_CHAIN (declspec_stack); }
333 | declmods setspecs notype_initdecls ';'
334 { current_declspecs = TREE_VALUE (declspec_stack);
335 prefix_attributes = TREE_PURPOSE (declspec_stack);
336 declspec_stack = TREE_CHAIN (declspec_stack); }
337 | typed_declspecs setspecs initdecls ';'
338 { current_declspecs = TREE_VALUE (declspec_stack);
339 prefix_attributes = TREE_PURPOSE (declspec_stack);
340 declspec_stack = TREE_CHAIN (declspec_stack); }
342 { pedwarn ("empty declaration"); }
343 | typed_declspecs ';'
349 pedwarn ("ANSI C does not allow extra `;' outside of a function"); }
353 typed_declspecs setspecs declarator
354 { if (! start_function (current_declspecs, $3,
355 prefix_attributes, NULL_TREE))
357 reinit_parse_for_function (); }
359 { store_parm_decls (); }
361 { finish_function (0);
362 current_declspecs = TREE_VALUE (declspec_stack);
363 prefix_attributes = TREE_PURPOSE (declspec_stack);
364 declspec_stack = TREE_CHAIN (declspec_stack); }
365 | typed_declspecs setspecs declarator error
366 { current_declspecs = TREE_VALUE (declspec_stack);
367 prefix_attributes = TREE_PURPOSE (declspec_stack);
368 declspec_stack = TREE_CHAIN (declspec_stack); }
369 | declmods setspecs notype_declarator
370 { if (! start_function (current_declspecs, $3,
371 prefix_attributes, NULL_TREE))
373 reinit_parse_for_function (); }
375 { store_parm_decls (); }
377 { finish_function (0);
378 current_declspecs = TREE_VALUE (declspec_stack);
379 prefix_attributes = TREE_PURPOSE (declspec_stack);
380 declspec_stack = TREE_CHAIN (declspec_stack); }
381 | declmods setspecs notype_declarator error
382 { current_declspecs = TREE_VALUE (declspec_stack);
383 prefix_attributes = TREE_PURPOSE (declspec_stack);
384 declspec_stack = TREE_CHAIN (declspec_stack); }
385 | setspecs notype_declarator
386 { if (! start_function (NULL_TREE, $2,
387 prefix_attributes, NULL_TREE))
389 reinit_parse_for_function (); }
391 { store_parm_decls (); }
393 { finish_function (0);
394 current_declspecs = TREE_VALUE (declspec_stack);
395 prefix_attributes = TREE_PURPOSE (declspec_stack);
396 declspec_stack = TREE_CHAIN (declspec_stack); }
397 | setspecs notype_declarator error
398 { current_declspecs = TREE_VALUE (declspec_stack);
399 prefix_attributes = TREE_PURPOSE (declspec_stack);
400 declspec_stack = TREE_CHAIN (declspec_stack); }
415 { $$ = NEGATE_EXPR; }
417 { $$ = CONVERT_EXPR; }
419 { $$ = PREINCREMENT_EXPR; }
421 { $$ = PREDECREMENT_EXPR; }
423 { $$ = BIT_NOT_EXPR; }
425 { $$ = TRUTH_NOT_EXPR; }
428 expr: nonnull_exprlist
429 { $$ = build_compound_expr ($1); }
440 { $$ = build_tree_list (NULL_TREE, $1); }
441 | nonnull_exprlist ',' expr_no_commas
442 { chainon ($1, build_tree_list (NULL_TREE, $3)); }
447 | '*' cast_expr %prec UNARY
448 { $$ = build_indirect_ref ($2, "unary *"); }
449 /* __extension__ turns off -pedantic for following primary. */
450 | extension cast_expr %prec UNARY
452 RESTORE_WARN_FLAGS ($1); }
453 | unop cast_expr %prec UNARY
454 { $$ = build_unary_op ($1, $2, 0);
455 overflow_warning ($$); }
456 /* Refer to the address of a label as a pointer. */
458 { tree label = lookup_label ($2);
460 pedwarn ("ANSI C forbids `&&'");
462 $$ = null_pointer_node;
465 TREE_USED (label) = 1;
466 $$ = build1 (ADDR_EXPR, ptr_type_node, label);
467 TREE_CONSTANT ($$) = 1;
470 /* This seems to be impossible on some machines, so let's turn it off.
471 You can use __builtin_next_arg to find the anonymous stack args.
473 { tree types = TYPE_ARG_TYPES (TREE_TYPE (current_function_decl));
474 $$ = error_mark_node;
475 if (TREE_VALUE (tree_last (types)) == void_type_node)
476 error ("`&...' used in function with fixed number of arguments");
480 pedwarn ("ANSI C forbids `&...'");
481 $$ = tree_last (DECL_ARGUMENTS (current_function_decl));
482 $$ = build_unary_op (ADDR_EXPR, $$, 0);
485 | sizeof unary_expr %prec UNARY
487 if (TREE_CODE ($2) == COMPONENT_REF
488 && DECL_C_BIT_FIELD (TREE_OPERAND ($2, 1)))
489 error ("`sizeof' applied to a bit-field");
490 $$ = c_sizeof (TREE_TYPE ($2)); }
491 | sizeof '(' typename ')' %prec HYPERUNARY
493 $$ = c_sizeof (groktypename ($3)); }
494 | alignof unary_expr %prec UNARY
496 $$ = c_alignof_expr ($2); }
497 | alignof '(' typename ')' %prec HYPERUNARY
499 $$ = c_alignof (groktypename ($3)); }
500 | REALPART cast_expr %prec UNARY
501 { $$ = build_unary_op (REALPART_EXPR, $2, 0); }
502 | IMAGPART cast_expr %prec UNARY
503 { $$ = build_unary_op (IMAGPART_EXPR, $2, 0); }
504 | VA_ARG '(' expr_no_commas ',' typename ')'
505 { $$ = build_va_arg ($3, groktypename ($5)); }
509 SIZEOF { skip_evaluation++; }
513 ALIGNOF { skip_evaluation++; }
518 | '(' typename ')' cast_expr %prec UNARY
519 { tree type = groktypename ($2);
520 $$ = build_c_cast (type, $4); }
521 | '(' typename ')' '{'
522 { start_init (NULL_TREE, NULL, 0);
523 $2 = groktypename ($2);
524 really_start_incremental_init ($2); }
525 initlist_maybe_comma '}' %prec UNARY
527 tree result = pop_init_level (0);
531 if (pedantic && ! flag_isoc99)
532 pedwarn ("ANSI C forbids constructor expressions");
533 if (TYPE_NAME (type) != 0)
535 if (TREE_CODE (TYPE_NAME (type)) == IDENTIFIER_NODE)
536 name = IDENTIFIER_POINTER (TYPE_NAME (type));
538 name = IDENTIFIER_POINTER (DECL_NAME (TYPE_NAME (type)));
543 if (TREE_CODE (type) == ARRAY_TYPE && !COMPLETE_TYPE_P (type))
545 int failure = complete_array_type (type, $$, 1);
554 | expr_no_commas '+' expr_no_commas
555 { $$ = parser_build_binary_op ($2, $1, $3); }
556 | expr_no_commas '-' expr_no_commas
557 { $$ = parser_build_binary_op ($2, $1, $3); }
558 | expr_no_commas '*' expr_no_commas
559 { $$ = parser_build_binary_op ($2, $1, $3); }
560 | expr_no_commas '/' expr_no_commas
561 { $$ = parser_build_binary_op ($2, $1, $3); }
562 | expr_no_commas '%' expr_no_commas
563 { $$ = parser_build_binary_op ($2, $1, $3); }
564 | expr_no_commas LSHIFT expr_no_commas
565 { $$ = parser_build_binary_op ($2, $1, $3); }
566 | expr_no_commas RSHIFT expr_no_commas
567 { $$ = parser_build_binary_op ($2, $1, $3); }
568 | expr_no_commas ARITHCOMPARE expr_no_commas
569 { $$ = parser_build_binary_op ($2, $1, $3); }
570 | expr_no_commas EQCOMPARE expr_no_commas
571 { $$ = parser_build_binary_op ($2, $1, $3); }
572 | expr_no_commas '&' expr_no_commas
573 { $$ = parser_build_binary_op ($2, $1, $3); }
574 | expr_no_commas '|' expr_no_commas
575 { $$ = parser_build_binary_op ($2, $1, $3); }
576 | expr_no_commas '^' expr_no_commas
577 { $$ = parser_build_binary_op ($2, $1, $3); }
578 | expr_no_commas ANDAND
579 { $1 = truthvalue_conversion (default_conversion ($1));
580 skip_evaluation += $1 == boolean_false_node; }
582 { skip_evaluation -= $1 == boolean_false_node;
583 $$ = parser_build_binary_op (TRUTH_ANDIF_EXPR, $1, $4); }
584 | expr_no_commas OROR
585 { $1 = truthvalue_conversion (default_conversion ($1));
586 skip_evaluation += $1 == boolean_true_node; }
588 { skip_evaluation -= $1 == boolean_true_node;
589 $$ = parser_build_binary_op (TRUTH_ORIF_EXPR, $1, $4); }
591 { $1 = truthvalue_conversion (default_conversion ($1));
592 skip_evaluation += $1 == boolean_false_node; }
594 { skip_evaluation += (($1 == boolean_true_node)
595 - ($1 == boolean_false_node)); }
597 { skip_evaluation -= $1 == boolean_true_node;
598 $$ = build_conditional_expr ($1, $4, $7); }
601 pedwarn ("ANSI C forbids omitting the middle term of a ?: expression");
602 /* Make sure first operand is calculated only once. */
603 $<ttype>2 = save_expr ($1);
604 $1 = truthvalue_conversion (default_conversion ($<ttype>2));
605 skip_evaluation += $1 == boolean_true_node; }
607 { skip_evaluation -= $1 == boolean_true_node;
608 $$ = build_conditional_expr ($1, $<ttype>2, $5); }
609 | expr_no_commas '=' expr_no_commas
611 $$ = build_modify_expr ($1, NOP_EXPR, $3);
612 class = TREE_CODE_CLASS (TREE_CODE ($$));
613 if (class == 'e' || class == '1'
614 || class == '2' || class == '<')
615 C_SET_EXP_ORIGINAL_CODE ($$, MODIFY_EXPR);
617 | expr_no_commas ASSIGN expr_no_commas
619 $$ = build_modify_expr ($1, $2, $3);
620 /* This inhibits warnings in truthvalue_conversion. */
621 class = TREE_CODE_CLASS (TREE_CODE ($$));
622 if (class == 'e' || class == '1'
623 || class == '2' || class == '<')
624 C_SET_EXP_ORIGINAL_CODE ($$, ERROR_MARK);
632 if (!$$ || $$ == error_mark_node)
634 if (yychar == YYEMPTY)
641 if (objc_receiver_context
642 && ! (objc_receiver_context
643 && strcmp (IDENTIFIER_POINTER ($1), "super")))
644 /* we have a message to super */
645 $$ = get_super_receiver ();
646 else if (objc_method_context
647 && (decl = is_ivar (objc_ivar_chain, $1)))
649 if (is_private (decl))
650 $$ = error_mark_node;
652 $$ = build_ivar_reference ($1);
657 /* Ordinary implicit function declaration. */
658 $$ = implicitly_declare ($1);
659 assemble_external ($$);
663 else if (current_function_decl == 0)
665 error ("`%s' undeclared here (not in a function)",
666 IDENTIFIER_POINTER ($1));
667 $$ = error_mark_node;
674 if (objc_receiver_context
675 && ! strcmp (IDENTIFIER_POINTER ($1), "super"))
676 /* we have a message to super */
677 $$ = get_super_receiver ();
678 else if (objc_method_context
679 && (decl = is_ivar (objc_ivar_chain, $1)))
681 if (is_private (decl))
682 $$ = error_mark_node;
684 $$ = build_ivar_reference ($1);
689 if (IDENTIFIER_GLOBAL_VALUE ($1) != error_mark_node
690 || IDENTIFIER_ERROR_LOCUS ($1) != current_function_decl)
692 error ("`%s' undeclared (first use in this function)",
693 IDENTIFIER_POINTER ($1));
695 if (! undeclared_variable_notice)
697 error ("(Each undeclared identifier is reported only once");
698 error ("for each function it appears in.)");
699 undeclared_variable_notice = 1;
702 $$ = error_mark_node;
703 /* Prevent repeated error messages. */
704 IDENTIFIER_GLOBAL_VALUE ($1) = error_mark_node;
705 IDENTIFIER_ERROR_LOCUS ($1) = current_function_decl;
709 else if (TREE_TYPE ($$) == error_mark_node)
710 $$ = error_mark_node;
711 else if (C_DECL_ANTICIPATED ($$))
713 /* The first time we see a build-in function used,
714 if it has not been declared. */
715 C_DECL_ANTICIPATED ($$) = 0;
716 if (yychar == YYEMPTY)
720 /* Omit the implicit declaration we
721 would ordinarily do, so we don't lose
722 the actual built in type.
723 But print a diagnostic for the mismatch. */
725 if (objc_method_context
726 && is_ivar (objc_ivar_chain, $1))
727 error ("Instance variable `%s' implicitly declared as function",
728 IDENTIFIER_POINTER (DECL_NAME ($$)));
731 if (TREE_CODE ($$) != FUNCTION_DECL)
732 error ("`%s' implicitly declared as function",
733 IDENTIFIER_POINTER (DECL_NAME ($$)));
734 else if ((TYPE_MODE (TREE_TYPE (TREE_TYPE ($$)))
735 != TYPE_MODE (integer_type_node))
736 && (TREE_TYPE (TREE_TYPE ($$))
738 pedwarn ("type mismatch in implicit declaration for built-in function `%s'",
739 IDENTIFIER_POINTER (DECL_NAME ($$)));
740 /* If it really returns void, change that to int. */
741 if (TREE_TYPE (TREE_TYPE ($$)) == void_type_node)
743 = build_function_type (integer_type_node,
744 TYPE_ARG_TYPES (TREE_TYPE ($$)));
747 pedwarn ("built-in function `%s' used without declaration",
748 IDENTIFIER_POINTER (DECL_NAME ($$)));
750 /* Do what we would ordinarily do when a fn is used. */
751 assemble_external ($$);
756 assemble_external ($$);
759 /* we have a definition - still check if iVariable */
761 if (!objc_receiver_context
762 || (objc_receiver_context
763 && strcmp (IDENTIFIER_POINTER ($1), "super")))
767 if (objc_method_context
768 && (decl = is_ivar (objc_ivar_chain, $1)))
770 if (IDENTIFIER_LOCAL_VALUE ($1))
771 warning ("local declaration of `%s' hides instance variable",
772 IDENTIFIER_POINTER ($1));
775 if (is_private (decl))
776 $$ = error_mark_node;
778 $$ = build_ivar_reference ($1);
782 else /* we have a message to super */
783 $$ = get_super_receiver ();
787 if (TREE_CODE ($$) == CONST_DECL)
789 $$ = DECL_INITIAL ($$);
790 /* This is to prevent an enum whose value is 0
791 from being considered a null pointer constant. */
792 $$ = build1 (NOP_EXPR, TREE_TYPE ($$), $$);
793 TREE_CONSTANT ($$) = 1;
798 { $$ = combine_strings ($1); }
800 { char class = TREE_CODE_CLASS (TREE_CODE ($2));
801 if (class == 'e' || class == '1'
802 || class == '2' || class == '<')
803 C_SET_EXP_ORIGINAL_CODE ($2, ERROR_MARK);
806 { $$ = error_mark_node; }
807 | compstmt_primary_start compstmt_nostart ')'
810 pedwarn ("ANSI C forbids braced-groups within expressions");
811 pop_iterator_stack ();
813 rtl_exp = expand_end_stmt_expr ($1);
814 /* The statements have side effects, so the group does. */
815 TREE_SIDE_EFFECTS (rtl_exp) = 1;
817 if (TREE_CODE ($2) == BLOCK)
819 /* Make a BIND_EXPR for the BLOCK already made. */
820 $$ = build (BIND_EXPR, TREE_TYPE (rtl_exp),
821 NULL_TREE, rtl_exp, $2);
822 /* Remove the block from the tree at this point.
823 It gets put back at the proper place
824 when the BIND_EXPR is expanded. */
830 | compstmt_primary_start error ')'
832 /* Make sure we call expand_end_stmt_expr. Otherwise
833 we are likely to lose sequences and crash later. */
834 pop_iterator_stack ();
836 expand_end_stmt_expr ($1);
837 $$ = error_mark_node;
839 | primary '(' exprlist ')' %prec '.'
840 { $$ = build_function_call ($1, $3); }
841 | primary '[' expr ']' %prec '.'
842 { $$ = build_array_ref ($1, $3); }
843 | primary '.' identifier
846 if (doing_objc_thang)
848 if (is_public ($1, $3))
849 $$ = build_component_ref ($1, $3);
851 $$ = error_mark_node;
855 $$ = build_component_ref ($1, $3);
857 | primary POINTSAT identifier
859 tree expr = build_indirect_ref ($1, "->");
862 if (doing_objc_thang)
864 if (is_public (expr, $3))
865 $$ = build_component_ref (expr, $3);
867 $$ = error_mark_node;
871 $$ = build_component_ref (expr, $3);
874 { $$ = build_unary_op (POSTINCREMENT_EXPR, $1, 0); }
876 { $$ = build_unary_op (POSTDECREMENT_EXPR, $1, 0); }
879 { $$ = build_message_expr ($1); }
881 { $$ = build_selector_expr ($1); }
883 { $$ = build_protocol_expr ($1); }
885 { $$ = build_encode_expr ($1); }
887 { $$ = build_objc_string_object ($1); }
891 /* Produces a STRING_CST with perhaps more STRING_CSTs chained onto it. */
895 { $$ = chainon ($1, $2);
897 if (warn_traditional && !in_system_header)
898 warning ("Use of ANSI string concatenation");
904 /* Produces an OBJC_STRING_CST with perhaps more OBJC_STRING_CSTs chained
908 | objc_string OBJC_STRING
909 { $$ = chainon ($1, $2); }
913 old_style_parm_decls:
917 /* ... is used here to indicate a varargs function. */
920 pedwarn ("ANSI C does not permit use of `varargs.h'"); }
923 /* The following are analogous to lineno_decl, decls and decl
924 except that they do not allow nested functions.
925 They are used for old-style parm decls. */
927 save_filename save_lineno datadecl
934 | datadecls lineno_datadecl
935 | lineno_datadecl errstmt
938 /* We don't allow prefix attributes here because they cause reduce/reduce
939 conflicts: we can't know whether we're parsing a function decl with
940 attribute suffix, or function defn with attribute prefix on first old
943 typed_declspecs_no_prefix_attr setspecs initdecls ';'
944 { current_declspecs = TREE_VALUE (declspec_stack);
945 prefix_attributes = TREE_PURPOSE (declspec_stack);
946 declspec_stack = TREE_CHAIN (declspec_stack); }
947 | declmods_no_prefix_attr setspecs notype_initdecls ';'
948 { current_declspecs = TREE_VALUE (declspec_stack);
949 prefix_attributes = TREE_PURPOSE (declspec_stack);
950 declspec_stack = TREE_CHAIN (declspec_stack); }
951 | typed_declspecs_no_prefix_attr ';'
952 { shadow_tag_warned ($1, 1);
953 pedwarn ("empty declaration"); }
954 | declmods_no_prefix_attr ';'
955 { pedwarn ("empty declaration"); }
958 /* This combination which saves a lineno before a decl
959 is the normal thing to use, rather than decl itself.
960 This is to avoid shift/reduce conflicts in contexts
961 where statement labels are allowed. */
963 save_filename save_lineno decl
971 | lineno_decl errstmt
974 /* records the type and storage class specs to use for processing
975 the declarators that follow.
976 Maintains a stack of outer-level values of current_declspecs,
977 for the sake of parm declarations nested in function declarators. */
978 setspecs: /* empty */
979 { pending_xref_error ();
980 declspec_stack = tree_cons (prefix_attributes,
983 split_specs_attrs ($<ttype>0,
984 ¤t_declspecs, &prefix_attributes); }
987 /* ??? Yuck. See after_type_declarator. */
988 setattrs: /* empty */
989 { prefix_attributes = chainon (prefix_attributes, $<ttype>0); }
993 typed_declspecs setspecs initdecls ';'
994 { current_declspecs = TREE_VALUE (declspec_stack);
995 prefix_attributes = TREE_PURPOSE (declspec_stack);
996 declspec_stack = TREE_CHAIN (declspec_stack); }
997 | declmods setspecs notype_initdecls ';'
998 { current_declspecs = TREE_VALUE (declspec_stack);
999 prefix_attributes = TREE_PURPOSE (declspec_stack);
1000 declspec_stack = TREE_CHAIN (declspec_stack); }
1001 | typed_declspecs setspecs nested_function
1002 { current_declspecs = TREE_VALUE (declspec_stack);
1003 prefix_attributes = TREE_PURPOSE (declspec_stack);
1004 declspec_stack = TREE_CHAIN (declspec_stack); }
1005 | declmods setspecs notype_nested_function
1006 { current_declspecs = TREE_VALUE (declspec_stack);
1007 prefix_attributes = TREE_PURPOSE (declspec_stack);
1008 declspec_stack = TREE_CHAIN (declspec_stack); }
1009 | typed_declspecs ';'
1010 { shadow_tag ($1); }
1012 { pedwarn ("empty declaration"); }
1014 { RESTORE_WARN_FLAGS ($1); }
1017 /* Declspecs which contain at least one type specifier or typedef name.
1018 (Just `const' or `volatile' is not enough.)
1019 A typedef'd name following these is taken as a name to be declared.
1020 Declspecs have a non-NULL TREE_VALUE, attributes do not. */
1023 typespec reserved_declspecs
1024 { $$ = tree_cons (NULL_TREE, $1, $2); }
1025 | declmods typespec reserved_declspecs
1026 { $$ = chainon ($3, tree_cons (NULL_TREE, $2, $1)); }
1029 reserved_declspecs: /* empty */
1031 | reserved_declspecs typespecqual_reserved
1032 { $$ = tree_cons (NULL_TREE, $2, $1); }
1033 | reserved_declspecs SCSPEC
1034 { if (extra_warnings)
1035 warning ("`%s' is not at beginning of declaration",
1036 IDENTIFIER_POINTER ($2));
1037 $$ = tree_cons (NULL_TREE, $2, $1); }
1038 | reserved_declspecs attributes
1039 { $$ = tree_cons ($2, NULL_TREE, $1); }
1042 typed_declspecs_no_prefix_attr:
1043 typespec reserved_declspecs_no_prefix_attr
1044 { $$ = tree_cons (NULL_TREE, $1, $2); }
1045 | declmods_no_prefix_attr typespec reserved_declspecs_no_prefix_attr
1046 { $$ = chainon ($3, tree_cons (NULL_TREE, $2, $1)); }
1049 reserved_declspecs_no_prefix_attr:
1052 | reserved_declspecs_no_prefix_attr typespecqual_reserved
1053 { $$ = tree_cons (NULL_TREE, $2, $1); }
1054 | reserved_declspecs_no_prefix_attr SCSPEC
1055 { if (extra_warnings)
1056 warning ("`%s' is not at beginning of declaration",
1057 IDENTIFIER_POINTER ($2));
1058 $$ = tree_cons (NULL_TREE, $2, $1); }
1061 /* List of just storage classes, type modifiers, and prefix attributes.
1062 A declaration can start with just this, but then it cannot be used
1063 to redeclare a typedef-name.
1064 Declspecs have a non-NULL TREE_VALUE, attributes do not. */
1067 declmods_no_prefix_attr
1070 { $$ = tree_cons ($1, NULL_TREE, NULL_TREE); }
1071 | declmods declmods_no_prefix_attr
1072 { $$ = chainon ($2, $1); }
1073 | declmods attributes
1074 { $$ = tree_cons ($2, NULL_TREE, $1); }
1077 declmods_no_prefix_attr:
1079 { $$ = tree_cons (NULL_TREE, $1, NULL_TREE);
1080 TREE_STATIC ($$) = 1; }
1082 { $$ = tree_cons (NULL_TREE, $1, NULL_TREE); }
1083 | declmods_no_prefix_attr TYPE_QUAL
1084 { $$ = tree_cons (NULL_TREE, $2, $1);
1085 TREE_STATIC ($$) = 1; }
1086 | declmods_no_prefix_attr SCSPEC
1087 { if (extra_warnings && TREE_STATIC ($1))
1088 warning ("`%s' is not at beginning of declaration",
1089 IDENTIFIER_POINTER ($2));
1090 $$ = tree_cons (NULL_TREE, $2, $1);
1091 TREE_STATIC ($$) = TREE_STATIC ($1); }
1095 /* Used instead of declspecs where storage classes are not allowed
1096 (that is, for typenames and structure components).
1097 Don't accept a typedef-name if anything but a modifier precedes it. */
1100 typespec reserved_typespecquals
1101 { $$ = tree_cons (NULL_TREE, $1, $2); }
1102 | nonempty_type_quals typespec reserved_typespecquals
1103 { $$ = chainon ($3, tree_cons (NULL_TREE, $2, $1)); }
1106 reserved_typespecquals: /* empty */
1108 | reserved_typespecquals typespecqual_reserved
1109 { $$ = tree_cons (NULL_TREE, $2, $1); }
1112 /* A typespec (but not a type qualifier).
1113 Once we have seen one of these in a declaration,
1114 if a typedef name appears then it is being redeclared. */
1119 { /* For a typedef name, record the meaning, not the name.
1120 In case of `foo foo, bar;'. */
1121 $$ = lookup_name ($1); }
1123 | CLASSNAME protocolrefs
1124 { $$ = get_static_reference ($1, $2); }
1125 | OBJECTNAME protocolrefs
1126 { $$ = get_object_reference ($2); }
1128 /* Make "<SomeProtocol>" equivalent to "id <SomeProtocol>"
1129 - nisse@lysator.liu.se */
1130 | non_empty_protocolrefs
1131 { $$ = get_object_reference ($1); }
1133 | TYPEOF '(' expr ')'
1134 { $$ = TREE_TYPE ($3); }
1135 | TYPEOF '(' typename ')'
1136 { $$ = groktypename ($3); }
1139 /* A typespec that is a reserved word, or a type qualifier. */
1141 typespecqual_reserved: TYPESPEC
1148 | initdecls ',' initdcl
1153 | notype_initdecls ',' initdcl
1159 | ASM_KEYWORD '(' string ')'
1160 { if (TREE_CHAIN ($3)) $3 = combine_strings ($3);
1166 declarator maybeasm maybe_attribute '='
1167 { $<ttype>$ = start_decl ($1, current_declspecs, 1,
1168 $3, prefix_attributes);
1169 start_init ($<ttype>$, $2, global_bindings_p ()); }
1171 /* Note how the declaration of the variable is in effect while its init is parsed! */
1173 finish_decl ($<ttype>5, $6, $2); }
1174 | declarator maybeasm maybe_attribute
1175 { tree d = start_decl ($1, current_declspecs, 0,
1176 $3, prefix_attributes);
1177 finish_decl (d, NULL_TREE, $2);
1182 notype_declarator maybeasm maybe_attribute '='
1183 { $<ttype>$ = start_decl ($1, current_declspecs, 1,
1184 $3, prefix_attributes);
1185 start_init ($<ttype>$, $2, global_bindings_p ()); }
1187 /* Note how the declaration of the variable is in effect while its init is parsed! */
1189 decl_attributes ($<ttype>5, $3, prefix_attributes);
1190 finish_decl ($<ttype>5, $6, $2); }
1191 | notype_declarator maybeasm maybe_attribute
1192 { tree d = start_decl ($1, current_declspecs, 0,
1193 $3, prefix_attributes);
1194 finish_decl (d, NULL_TREE, $2); }
1196 /* the * rules are dummies to accept the Apollo extended syntax
1197 so that the header files compile. */
1208 | attributes attribute
1209 { $$ = chainon ($1, $2); }
1213 ATTRIBUTE '(' '(' attribute_list ')' ')'
1220 | attribute_list ',' attrib
1221 { $$ = chainon ($1, $3); }
1228 { $$ = build_tree_list ($1, NULL_TREE); }
1229 | any_word '(' IDENTIFIER ')'
1230 { $$ = build_tree_list ($1, build_tree_list (NULL_TREE, $3)); }
1231 | any_word '(' IDENTIFIER ',' nonnull_exprlist ')'
1232 { $$ = build_tree_list ($1, tree_cons (NULL_TREE, $3, $5)); }
1233 | any_word '(' exprlist ')'
1234 { $$ = build_tree_list ($1, $3); }
1237 /* This still leaves out most reserved keywords,
1238 shouldn't we include them? */
1247 /* Initializers. `init' is the entry point. */
1252 { really_start_incremental_init (NULL_TREE); }
1253 initlist_maybe_comma '}'
1254 { $$ = pop_init_level (0); }
1256 { $$ = error_mark_node; }
1259 /* `initlist_maybe_comma' is the guts of an initializer in braces. */
1260 initlist_maybe_comma:
1263 pedwarn ("ANSI C forbids empty initializer braces"); }
1264 | initlist1 maybecomma
1269 | initlist1 ',' initelt
1272 /* `initelt' is a single element of an initializer.
1273 It may use braces. */
1275 designator_list '=' initval
1276 | designator initval
1278 { set_init_label ($1); }
1285 { push_init_level (0); }
1286 initlist_maybe_comma '}'
1287 { process_init_element (pop_init_level (0)); }
1289 { process_init_element ($1); }
1295 | designator_list designator
1300 { set_init_label ($2); }
1301 /* These are for labeled elements. The syntax for an array element
1302 initializer conflicts with the syntax for an Objective-C message,
1303 so don't include these productions in the Objective-C grammar. */
1305 | '[' expr_no_commas ELLIPSIS expr_no_commas ']'
1306 { set_init_index ($2, $4); }
1307 | '[' expr_no_commas ']'
1308 { set_init_index ($2, NULL_TREE); }
1315 pedwarn ("ANSI C forbids nested functions");
1317 push_function_context ();
1318 if (! start_function (current_declspecs, $1,
1319 prefix_attributes, NULL_TREE))
1321 pop_function_context ();
1324 reinit_parse_for_function (); }
1325 old_style_parm_decls
1326 { store_parm_decls (); }
1327 /* This used to use compstmt_or_error.
1328 That caused a bug with input `f(g) int g {}',
1329 where the use of YYERROR1 above caused an error
1330 which then was handled by compstmt_or_error.
1331 There followed a repeated execution of that same rule,
1332 which called YYERROR1 again, and so on. */
1334 { finish_function (1);
1335 pop_function_context (); }
1338 notype_nested_function:
1341 pedwarn ("ANSI C forbids nested functions");
1343 push_function_context ();
1344 if (! start_function (current_declspecs, $1,
1345 prefix_attributes, NULL_TREE))
1347 pop_function_context ();
1350 reinit_parse_for_function (); }
1351 old_style_parm_decls
1352 { store_parm_decls (); }
1353 /* This used to use compstmt_or_error.
1354 That caused a bug with input `f(g) int g {}',
1355 where the use of YYERROR1 above caused an error
1356 which then was handled by compstmt_or_error.
1357 There followed a repeated execution of that same rule,
1358 which called YYERROR1 again, and so on. */
1360 { finish_function (1);
1361 pop_function_context (); }
1364 /* Any kind of declarator (thus, all declarators allowed
1365 after an explicit typespec). */
1368 after_type_declarator
1372 /* A declarator that is allowed only after an explicit typespec. */
1374 after_type_declarator:
1375 '(' after_type_declarator ')'
1377 | after_type_declarator '(' parmlist_or_identifiers %prec '.'
1378 { $$ = build_nt (CALL_EXPR, $1, $3, NULL_TREE); }
1379 /* | after_type_declarator '(' error ')' %prec '.'
1380 { $$ = build_nt (CALL_EXPR, $1, NULL_TREE, NULL_TREE);
1381 poplevel (0, 0, 0); } */
1382 | after_type_declarator '[' expr ']' %prec '.'
1383 { $$ = build_nt (ARRAY_REF, $1, $3); }
1384 | after_type_declarator '[' ']' %prec '.'
1385 { $$ = build_nt (ARRAY_REF, $1, NULL_TREE); }
1386 | '*' type_quals after_type_declarator %prec UNARY
1387 { $$ = make_pointer_declarator ($2, $3); }
1388 /* ??? Yuck. setattrs is a quick hack. We can't use
1389 prefix_attributes because $1 only applies to this
1390 declarator. We assume setspecs has already been done.
1391 setattrs also avoids 5 reduce/reduce conflicts (otherwise multiple
1392 attributes could be recognized here or in `attributes'). */
1393 | attributes setattrs after_type_declarator
1401 /* Kinds of declarator that can appear in a parameter list
1402 in addition to notype_declarator. This is like after_type_declarator
1403 but does not allow a typedef name in parentheses as an identifier
1404 (because it would conflict with a function with that typedef as arg). */
1407 parm_declarator '(' parmlist_or_identifiers %prec '.'
1408 { $$ = build_nt (CALL_EXPR, $1, $3, NULL_TREE); }
1409 /* | parm_declarator '(' error ')' %prec '.'
1410 { $$ = build_nt (CALL_EXPR, $1, NULL_TREE, NULL_TREE);
1411 poplevel (0, 0, 0); } */
1413 | parm_declarator '[' '*' ']' %prec '.'
1414 { $$ = build_nt (ARRAY_REF, $1, NULL_TREE);
1416 error ("`[*]' in parameter declaration only allowed in ISO C 99");
1419 | parm_declarator '[' expr ']' %prec '.'
1420 { $$ = build_nt (ARRAY_REF, $1, $3); }
1421 | parm_declarator '[' ']' %prec '.'
1422 { $$ = build_nt (ARRAY_REF, $1, NULL_TREE); }
1423 | '*' type_quals parm_declarator %prec UNARY
1424 { $$ = make_pointer_declarator ($2, $3); }
1425 /* ??? Yuck. setattrs is a quick hack. We can't use
1426 prefix_attributes because $1 only applies to this
1427 declarator. We assume setspecs has already been done.
1428 setattrs also avoids 5 reduce/reduce conflicts (otherwise multiple
1429 attributes could be recognized here or in `attributes'). */
1430 | attributes setattrs parm_declarator
1435 /* A declarator allowed whether or not there has been
1436 an explicit typespec. These cannot redeclare a typedef-name. */
1439 notype_declarator '(' parmlist_or_identifiers %prec '.'
1440 { $$ = build_nt (CALL_EXPR, $1, $3, NULL_TREE); }
1441 /* | notype_declarator '(' error ')' %prec '.'
1442 { $$ = build_nt (CALL_EXPR, $1, NULL_TREE, NULL_TREE);
1443 poplevel (0, 0, 0); } */
1444 | '(' notype_declarator ')'
1446 | '*' type_quals notype_declarator %prec UNARY
1447 { $$ = make_pointer_declarator ($2, $3); }
1449 | notype_declarator '[' '*' ']' %prec '.'
1450 { $$ = build_nt (ARRAY_REF, $1, NULL_TREE);
1452 error ("`[*]' in parameter declaration only allowed in ISO C 99");
1455 | notype_declarator '[' expr ']' %prec '.'
1456 { $$ = build_nt (ARRAY_REF, $1, $3); }
1457 | notype_declarator '[' ']' %prec '.'
1458 { $$ = build_nt (ARRAY_REF, $1, NULL_TREE); }
1459 /* ??? Yuck. setattrs is a quick hack. We can't use
1460 prefix_attributes because $1 only applies to this
1461 declarator. We assume setspecs has already been done.
1462 setattrs also avoids 5 reduce/reduce conflicts (otherwise multiple
1463 attributes could be recognized here or in `attributes'). */
1464 | attributes setattrs notype_declarator
1491 struct_head identifier '{'
1492 { $$ = start_struct (RECORD_TYPE, $2);
1493 /* Start scope of tag before parsing components. */
1495 component_decl_list '}' maybe_attribute
1496 { $$ = finish_struct ($<ttype>4, $5, chainon ($1, $7)); }
1497 | struct_head '{' component_decl_list '}' maybe_attribute
1498 { $$ = finish_struct (start_struct (RECORD_TYPE, NULL_TREE),
1499 $3, chainon ($1, $5));
1501 | struct_head identifier
1502 { $$ = xref_tag (RECORD_TYPE, $2); }
1503 | union_head identifier '{'
1504 { $$ = start_struct (UNION_TYPE, $2); }
1505 component_decl_list '}' maybe_attribute
1506 { $$ = finish_struct ($<ttype>4, $5, chainon ($1, $7)); }
1507 | union_head '{' component_decl_list '}' maybe_attribute
1508 { $$ = finish_struct (start_struct (UNION_TYPE, NULL_TREE),
1509 $3, chainon ($1, $5));
1511 | union_head identifier
1512 { $$ = xref_tag (UNION_TYPE, $2); }
1513 | enum_head identifier '{'
1514 { $$ = start_enum ($2); }
1515 enumlist maybecomma_warn '}' maybe_attribute
1516 { $$ = finish_enum ($<ttype>4, nreverse ($5),
1517 chainon ($1, $8)); }
1519 { $$ = start_enum (NULL_TREE); }
1520 enumlist maybecomma_warn '}' maybe_attribute
1521 { $$ = finish_enum ($<ttype>3, nreverse ($4),
1522 chainon ($1, $7)); }
1523 | enum_head identifier
1524 { $$ = xref_tag (ENUMERAL_TYPE, $2); }
1535 { if (pedantic && ! flag_isoc99)
1536 pedwarn ("comma at end of enumerator list"); }
1539 component_decl_list:
1540 component_decl_list2
1542 | component_decl_list2 component_decl
1543 { $$ = chainon ($1, $2);
1544 pedwarn ("no semicolon at end of struct or union"); }
1547 component_decl_list2: /* empty */
1549 | component_decl_list2 component_decl ';'
1550 { $$ = chainon ($1, $2); }
1551 | component_decl_list2 ';'
1553 pedwarn ("extra semicolon in struct or union specified"); }
1555 /* foo(sizeof(struct{ @defs(ClassName)})); */
1556 | DEFS '(' CLASSNAME ')'
1558 tree interface = lookup_interface ($3);
1561 $$ = get_class_ivars (interface);
1564 error ("Cannot find interface declaration for `%s'",
1565 IDENTIFIER_POINTER ($3));
1572 /* There is a shift-reduce conflict here, because `components' may
1573 start with a `typename'. It happens that shifting (the default resolution)
1574 does the right thing, because it treats the `typename' as part of
1575 a `typed_typespecs'.
1577 It is possible that this same technique would allow the distinction
1578 between `notype_initdecls' and `initdecls' to be eliminated.
1579 But I am being cautious and not trying it. */
1582 typed_typespecs setspecs components
1584 current_declspecs = TREE_VALUE (declspec_stack);
1585 prefix_attributes = TREE_PURPOSE (declspec_stack);
1586 declspec_stack = TREE_CHAIN (declspec_stack); }
1587 | typed_typespecs setspecs save_filename save_lineno maybe_attribute
1589 /* Support for unnamed structs or unions as members of
1590 structs or unions (which is [a] useful and [b] supports
1593 pedwarn ("ANSI C doesn't support unnamed structs/unions");
1595 $$ = grokfield($3, $4, NULL, current_declspecs, NULL_TREE);
1596 current_declspecs = TREE_VALUE (declspec_stack);
1597 prefix_attributes = TREE_PURPOSE (declspec_stack);
1598 declspec_stack = TREE_CHAIN (declspec_stack);
1600 | nonempty_type_quals setspecs components
1602 current_declspecs = TREE_VALUE (declspec_stack);
1603 prefix_attributes = TREE_PURPOSE (declspec_stack);
1604 declspec_stack = TREE_CHAIN (declspec_stack); }
1605 | nonempty_type_quals
1607 pedwarn ("ANSI C forbids member declarations with no members");
1612 | extension component_decl
1614 RESTORE_WARN_FLAGS ($1); }
1618 component_declarator
1619 | components ',' component_declarator
1620 { $$ = chainon ($1, $3); }
1623 component_declarator:
1624 save_filename save_lineno declarator maybe_attribute
1625 { $$ = grokfield ($1, $2, $3, current_declspecs, NULL_TREE);
1626 decl_attributes ($$, $4, prefix_attributes); }
1627 | save_filename save_lineno
1628 declarator ':' expr_no_commas maybe_attribute
1629 { $$ = grokfield ($1, $2, $3, current_declspecs, $5);
1630 decl_attributes ($$, $6, prefix_attributes); }
1631 | save_filename save_lineno ':' expr_no_commas maybe_attribute
1632 { $$ = grokfield ($1, $2, NULL_TREE, current_declspecs, $4);
1633 decl_attributes ($$, $5, prefix_attributes); }
1636 /* We chain the enumerators in reverse order.
1637 They are put in forward order where enumlist is used.
1638 (The order used to be significant, but no longer is so.
1639 However, we still maintain the order, just to be clean.) */
1643 | enumlist ',' enumerator
1644 { if ($1 == error_mark_node)
1647 $$ = chainon ($3, $1); }
1649 { $$ = error_mark_node; }
1655 { $$ = build_enumerator ($1, NULL_TREE); }
1656 | identifier '=' expr_no_commas
1657 { $$ = build_enumerator ($1, $3); }
1661 typed_typespecs absdcl
1662 { $$ = build_tree_list ($1, $2); }
1663 | nonempty_type_quals absdcl
1664 { $$ = build_tree_list ($1, $2); }
1667 absdcl: /* an absolute declarator */
1673 nonempty_type_quals:
1675 { $$ = tree_cons (NULL_TREE, $1, NULL_TREE); }
1676 | nonempty_type_quals TYPE_QUAL
1677 { $$ = tree_cons (NULL_TREE, $2, $1); }
1683 | type_quals TYPE_QUAL
1684 { $$ = tree_cons (NULL_TREE, $2, $1); }
1687 absdcl1: /* a nonempty absolute declarator */
1690 /* `(typedef)1' is `int'. */
1691 | '*' type_quals absdcl1 %prec UNARY
1692 { $$ = make_pointer_declarator ($2, $3); }
1693 | '*' type_quals %prec UNARY
1694 { $$ = make_pointer_declarator ($2, NULL_TREE); }
1695 | absdcl1 '(' parmlist %prec '.'
1696 { $$ = build_nt (CALL_EXPR, $1, $3, NULL_TREE); }
1697 | absdcl1 '[' expr ']' %prec '.'
1698 { $$ = build_nt (ARRAY_REF, $1, $3); }
1699 | absdcl1 '[' ']' %prec '.'
1700 { $$ = build_nt (ARRAY_REF, $1, NULL_TREE); }
1701 | '(' parmlist %prec '.'
1702 { $$ = build_nt (CALL_EXPR, NULL_TREE, $2, NULL_TREE); }
1703 | '[' expr ']' %prec '.'
1704 { $$ = build_nt (ARRAY_REF, NULL_TREE, $2); }
1706 { $$ = build_nt (ARRAY_REF, NULL_TREE, NULL_TREE); }
1707 /* ??? It appears we have to support attributes here, however
1708 using prefix_attributes is wrong. */
1709 | attributes setattrs absdcl1
1713 /* at least one statement, the first of which parses without error. */
1714 /* stmts is used only after decls, so an invalid first statement
1715 is actually regarded as an invalid decl and part of the decls. */
1718 lineno_stmt_or_labels
1721 pedwarn ("ANSI C forbids label at end of compound statement");
1725 lineno_stmt_or_labels:
1726 lineno_stmt_or_label
1727 | lineno_stmt_or_labels lineno_stmt_or_label
1729 | lineno_stmt_or_labels errstmt
1741 pushlevel: /* empty */
1742 { emit_line_note (input_filename, lineno);
1745 expand_start_bindings (0);
1747 if (objc_method_context)
1753 /* Read zero or more forward-declarations for labels
1754 that nested functions can jump to. */
1759 pedwarn ("ANSI C forbids label declarations"); }
1764 | label_decls label_decl
1768 LABEL identifiers_or_typenames ';'
1770 for (link = $2; link; link = TREE_CHAIN (link))
1772 tree label = shadow_label (TREE_VALUE (link));
1773 C_DECLARED_LABEL_FLAG (label) = 1;
1774 declare_nonlocal_label (label);
1779 /* This is the body of a function definition.
1780 It causes syntax errors to ignore to the next openbrace. */
1787 compstmt_start: '{' { compstmt_count++; }
1789 compstmt_nostart: '}'
1790 { $$ = convert (void_type_node, integer_zero_node); }
1791 | pushlevel maybe_label_decls decls xstmts '}'
1792 { emit_line_note (input_filename, lineno);
1793 expand_end_bindings (getdecls (), 1, 0);
1794 $$ = poplevel (1, 1, 0); }
1795 | pushlevel maybe_label_decls error '}'
1796 { emit_line_note (input_filename, lineno);
1797 expand_end_bindings (getdecls (), kept_level_p (), 0);
1798 $$ = poplevel (kept_level_p (), 0, 0); }
1799 | pushlevel maybe_label_decls stmts '}'
1800 { emit_line_note (input_filename, lineno);
1801 expand_end_bindings (getdecls (), kept_level_p (), 0);
1802 $$ = poplevel (kept_level_p (), 0, 0); }
1805 compstmt_primary_start:
1807 { if (current_function_decl == 0)
1809 error ("braced-group within expression allowed only inside a function");
1812 /* We must force a BLOCK for this level
1813 so that, if it is not expanded later,
1814 there is a way to turn off the entire subtree of blocks
1815 that are contained in it. */
1817 push_iterator_stack ();
1818 push_label_level ();
1819 $$ = expand_start_stmt_expr ();
1823 compstmt: compstmt_start compstmt_nostart
1827 /* Value is number of statements counted as of the closeparen. */
1829 if_prefix lineno_labeled_stmt
1830 /* Make sure c_expand_end_cond is run once
1831 for each call to c_expand_start_cond.
1832 Otherwise a crash is likely. */
1838 { emit_line_note ($<filename>-1, $<lineno>0);
1839 c_expand_start_cond (truthvalue_conversion ($3), 0,
1841 $<itype>$ = stmt_count;
1842 if_stmt_file = $<filename>-1;
1843 if_stmt_line = $<lineno>0;
1844 position_after_white_space (); }
1847 /* This is a subroutine of stmt.
1848 It is used twice, once for valid DO statements
1849 and once for catching errors in parsing the end test. */
1854 emit_line_note ($<filename>-1, $<lineno>0);
1855 /* See comment in `while' alternative, above. */
1857 expand_start_loop_continue_elsewhere (1);
1858 position_after_white_space (); }
1859 lineno_labeled_stmt WHILE
1860 { expand_loop_continue_here (); }
1864 { $$ = input_filename; }
1871 lineno_labeled_stmt:
1872 save_filename save_lineno stmt
1874 /* | save_filename save_lineno error
1877 | save_filename save_lineno label lineno_labeled_stmt
1881 lineno_stmt_or_label:
1882 save_filename save_lineno stmt_or_label
1893 /* Parse a single real statement, not including any labels. */
1900 emit_line_note ($<filename>-1, $<lineno>0);
1901 /* It appears that this should not be done--that a non-lvalue array
1902 shouldn't get an error if the value isn't used.
1903 Section 3.2.2.1 says that an array lvalue gets converted to a pointer
1904 if it appears as a top-level expression,
1905 but says nothing about non-lvalue arrays. */
1907 /* Call default_conversion to get an error
1908 on referring to a register array if pedantic. */
1909 if (TREE_CODE (TREE_TYPE ($1)) == ARRAY_TYPE
1910 || TREE_CODE (TREE_TYPE ($1)) == FUNCTION_TYPE)
1911 $1 = default_conversion ($1);
1913 iterator_expand ($1); }
1915 { c_expand_start_else ();
1916 $<itype>1 = stmt_count;
1917 position_after_white_space (); }
1919 { c_expand_end_cond ();
1920 if (extra_warnings && stmt_count == $<itype>1)
1921 warning ("empty body in an else-statement"); }
1922 | simple_if %prec IF
1923 { c_expand_end_cond ();
1924 /* This warning is here instead of in simple_if, because we
1925 do not want a warning if an empty if is followed by an
1926 else statement. Increment stmt_count so we don't
1927 give a second error if this is a nested `if'. */
1928 if (extra_warnings && stmt_count++ == $<itype>1)
1929 warning_with_file_and_line (if_stmt_file, if_stmt_line,
1930 "empty body in an if-statement"); }
1931 /* Make sure c_expand_end_cond is run once
1932 for each call to c_expand_start_cond.
1933 Otherwise a crash is likely. */
1934 | simple_if ELSE error
1935 { c_expand_end_cond (); }
1938 emit_line_note ($<filename>-1, $<lineno>0);
1939 /* The emit_nop used to come before emit_line_note,
1940 but that made the nop seem like part of the preceding line.
1941 And that was confusing when the preceding line was
1942 inside of an if statement and was not really executed.
1943 I think it ought to work to put the nop after the line number.
1944 We will see. --rms, July 15, 1991. */
1947 { /* Don't start the loop till we have succeeded
1948 in parsing the end test. This is to make sure
1949 that we end every loop we start. */
1950 expand_start_loop (1);
1951 emit_line_note (input_filename, lineno);
1952 expand_exit_loop_if_false (NULL_PTR,
1953 truthvalue_conversion ($4));
1954 position_after_white_space (); }
1956 { expand_end_loop (); }
1959 { emit_line_note (input_filename, lineno);
1960 expand_exit_loop_if_false (NULL_PTR,
1961 truthvalue_conversion ($3));
1962 expand_end_loop (); }
1963 /* This rule is needed to make sure we end every loop we start. */
1964 | do_stmt_start error
1965 { expand_end_loop (); }
1969 emit_line_note ($<filename>-1, $<lineno>0);
1970 /* See comment in `while' alternative, above. */
1972 if ($3) c_expand_expr_stmt ($3);
1973 /* Next step is to call expand_start_loop_continue_elsewhere,
1974 but wait till after we parse the entire for (...).
1975 Otherwise, invalid input might cause us to call that
1976 fn without calling expand_end_loop. */
1979 /* Can't emit now; wait till after expand_start_loop... */
1980 { $<lineno>7 = lineno;
1981 $<filename>$ = input_filename; }
1984 /* Start the loop. Doing this after parsing
1985 all the expressions ensures we will end the loop. */
1986 expand_start_loop_continue_elsewhere (1);
1987 /* Emit the end-test, with a line number. */
1988 emit_line_note ($<filename>8, $<lineno>7);
1990 expand_exit_loop_if_false (NULL_PTR,
1991 truthvalue_conversion ($6));
1992 $<lineno>7 = lineno;
1993 $<filename>8 = input_filename;
1994 position_after_white_space (); }
1996 { /* Emit the increment expression, with a line number. */
1997 emit_line_note ($<filename>8, $<lineno>7);
1998 expand_loop_continue_here ();
2000 c_expand_expr_stmt ($9);
2001 expand_end_loop (); }
2002 | SWITCH '(' expr ')'
2004 emit_line_note ($<filename>-1, $<lineno>0);
2005 c_expand_start_case ($3);
2006 position_after_white_space (); }
2008 { expand_end_case ($3); }
2011 emit_line_note ($<filename>-1, $<lineno>0);
2012 if ( ! expand_exit_something ())
2013 error ("break statement not within loop or switch"); }
2016 emit_line_note ($<filename>-1, $<lineno>0);
2017 if (! expand_continue_loop (NULL_PTR))
2018 error ("continue statement not within a loop"); }
2021 emit_line_note ($<filename>-1, $<lineno>0);
2022 c_expand_return (NULL_TREE); }
2025 emit_line_note ($<filename>-1, $<lineno>0);
2026 c_expand_return ($2); }
2027 | ASM_KEYWORD maybe_type_qual '(' expr ')' ';'
2029 emit_line_note ($<filename>-1, $<lineno>0);
2031 if ((TREE_CODE ($4) == ADDR_EXPR
2032 && TREE_CODE (TREE_OPERAND ($4, 0)) == STRING_CST)
2033 || TREE_CODE ($4) == STRING_CST)
2036 error ("argument of `asm' is not a constant string"); }
2037 /* This is the case with just output operands. */
2038 | ASM_KEYWORD maybe_type_qual '(' expr ':' asm_operands ')' ';'
2040 emit_line_note ($<filename>-1, $<lineno>0);
2041 c_expand_asm_operands ($4, $6, NULL_TREE, NULL_TREE,
2042 $2 == ridpointers[(int)RID_VOLATILE],
2043 input_filename, lineno); }
2044 /* This is the case with input operands as well. */
2045 | ASM_KEYWORD maybe_type_qual '(' expr ':' asm_operands ':' asm_operands ')' ';'
2047 emit_line_note ($<filename>-1, $<lineno>0);
2048 c_expand_asm_operands ($4, $6, $8, NULL_TREE,
2049 $2 == ridpointers[(int)RID_VOLATILE],
2050 input_filename, lineno); }
2051 /* This is the case with clobbered registers as well. */
2052 | ASM_KEYWORD maybe_type_qual '(' expr ':' asm_operands ':'
2053 asm_operands ':' asm_clobbers ')' ';'
2055 emit_line_note ($<filename>-1, $<lineno>0);
2056 c_expand_asm_operands ($4, $6, $8, $10,
2057 $2 == ridpointers[(int)RID_VOLATILE],
2058 input_filename, lineno); }
2059 | GOTO identifier ';'
2062 emit_line_note ($<filename>-1, $<lineno>0);
2063 decl = lookup_label ($2);
2066 TREE_USED (decl) = 1;
2072 pedwarn ("ANSI C forbids `goto *expr;'");
2074 emit_line_note ($<filename>-1, $<lineno>0);
2075 expand_computed_goto (convert (ptr_type_node, $3)); }
2080 all_iter_stmt_simple
2081 /* | all_iter_stmt_with_decl */
2084 all_iter_stmt_simple:
2087 /* The value returned by this action is */
2088 /* 1 if everything is OK */
2089 /* 0 in case of error or already bound iterator */
2092 if (TREE_CODE ($3) != VAR_DECL)
2093 error ("invalid `for (ITERATOR)' syntax");
2094 else if (! ITERATOR_P ($3))
2095 error ("`%s' is not an iterator",
2096 IDENTIFIER_POINTER (DECL_NAME ($3)));
2097 else if (ITERATOR_BOUND_P ($3))
2098 error ("`for (%s)' inside expansion of same iterator",
2099 IDENTIFIER_POINTER (DECL_NAME ($3)));
2103 iterator_for_loop_start ($3);
2109 iterator_for_loop_end ($3);
2112 /* This really should allow any kind of declaration,
2113 for generality. Fix it before turning it back on.
2115 all_iter_stmt_with_decl:
2116 FOR '(' ITERATOR pushlevel setspecs iterator_spec ')'
2118 */ /* The value returned by this action is */
2119 /* 1 if everything is OK */
2120 /* 0 in case of error or already bound iterator */
2122 iterator_for_loop_start ($6);
2126 iterator_for_loop_end ($6);
2127 emit_line_note (input_filename, lineno);
2128 expand_end_bindings (getdecls (), 1, 0);
2129 $<ttype>$ = poplevel (1, 1, 0);
2133 /* Any kind of label, including jump labels and case labels.
2134 ANSI C accepts labels only before statements, but we allow them
2135 also at the end of a compound statement. */
2137 label: CASE expr_no_commas ':'
2138 { register tree value = check_case_value ($2);
2140 = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE);
2144 if (value != error_mark_node)
2149 if (pedantic && ! INTEGRAL_TYPE_P (TREE_TYPE (value)))
2150 pedwarn ("label must have integral type in ANSI C");
2152 success = pushcase (value, convert_and_check,
2156 error ("case label not within a switch statement");
2157 else if (success == 2)
2159 error ("duplicate case value");
2160 error_with_decl (duplicate, "this is the first entry for that value");
2162 else if (success == 3)
2163 warning ("case value out of range");
2164 else if (success == 5)
2165 error ("case label within scope of cleanup or variable array");
2167 position_after_white_space (); }
2168 | CASE expr_no_commas ELLIPSIS expr_no_commas ':'
2169 { register tree value1 = check_case_value ($2);
2170 register tree value2 = check_case_value ($4);
2172 = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE);
2175 pedwarn ("ANSI C forbids case ranges");
2178 if (value1 != error_mark_node && value2 != error_mark_node)
2181 int success = pushcase_range (value1, value2,
2182 convert_and_check, label,
2185 error ("case label not within a switch statement");
2186 else if (success == 2)
2188 error ("duplicate case value");
2189 error_with_decl (duplicate, "this is the first entry for that value");
2191 else if (success == 3)
2192 warning ("case value out of range");
2193 else if (success == 4)
2194 warning ("empty case range");
2195 else if (success == 5)
2196 error ("case label within scope of cleanup or variable array");
2198 position_after_white_space (); }
2203 = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE);
2204 int success = pushcase (NULL_TREE, 0, label, &duplicate);
2207 error ("default label not within a switch statement");
2208 else if (success == 2)
2210 error ("multiple default labels in one switch");
2211 error_with_decl (duplicate, "this is the first default label");
2213 position_after_white_space (); }
2214 | identifier ':' maybe_attribute
2215 { tree label = define_label (input_filename, lineno, $1);
2220 expand_label (label);
2221 decl_attributes (label, $3, NULL_TREE);
2223 position_after_white_space (); }
2226 /* Either a type-qualifier or nothing. First thing in an `asm' statement. */
2230 { emit_line_note (input_filename, lineno);
2233 { emit_line_note (input_filename, lineno); }
2242 /* These are the operands other than the first string and colon
2243 in asm ("addextend %2,%1": "=dm" (x), "0" (y), "g" (*x)) */
2244 asm_operands: /* empty */
2246 | nonnull_asm_operands
2249 nonnull_asm_operands:
2251 | nonnull_asm_operands ',' asm_operand
2252 { $$ = chainon ($1, $3); }
2257 { $$ = build_tree_list ($1, $3); }
2262 { $$ = tree_cons (NULL_TREE, combine_strings ($1), NULL_TREE); }
2263 | asm_clobbers ',' string
2264 { $$ = tree_cons (NULL_TREE, combine_strings ($3), $1); }
2267 /* This is what appears inside the parens in a function declarator.
2268 Its value is a list of ..._TYPE nodes. */
2271 clear_parm_order ();
2272 declare_parm_level (0); }
2275 parmlist_tags_warning ();
2276 poplevel (0, 0, 0); }
2284 pedwarn ("ANSI C forbids forward parameter declarations");
2285 /* Mark the forward decls as such. */
2286 for (parm = getdecls (); parm; parm = TREE_CHAIN (parm))
2287 TREE_ASM_WRITTEN (parm) = 1;
2288 clear_parm_order (); }
2292 { $$ = tree_cons (NULL_TREE, NULL_TREE, NULL_TREE); }
2295 /* This is what appears inside the parens in a function declarator.
2296 Is value is represented in the format that grokdeclarator expects. */
2297 parmlist_2: /* empty */
2298 { $$ = get_parm_info (0); }
2300 { $$ = get_parm_info (0);
2301 /* Gcc used to allow this as an extension. However, it does
2302 not work for all targets, and thus has been disabled.
2303 Also, since func (...) and func () are indistinguishable,
2304 it caused problems with the code in expand_builtin which
2305 tries to verify that BUILT_IN_NEXT_ARG is being used
2307 error ("ANSI C requires a named argument before `...'");
2310 { $$ = get_parm_info (1); }
2311 | parms ',' ELLIPSIS
2312 { $$ = get_parm_info (0); }
2317 { push_parm_decl ($1); }
2319 { push_parm_decl ($3); }
2322 /* A single parameter declaration or parameter type name,
2323 as found in a parmlist. */
2325 typed_declspecs setspecs parm_declarator maybe_attribute
2326 { $$ = build_tree_list (build_tree_list (current_declspecs,
2328 build_tree_list (prefix_attributes,
2330 current_declspecs = TREE_VALUE (declspec_stack);
2331 prefix_attributes = TREE_PURPOSE (declspec_stack);
2332 declspec_stack = TREE_CHAIN (declspec_stack); }
2333 | typed_declspecs setspecs notype_declarator maybe_attribute
2334 { $$ = build_tree_list (build_tree_list (current_declspecs,
2336 build_tree_list (prefix_attributes,
2338 current_declspecs = TREE_VALUE (declspec_stack);
2339 prefix_attributes = TREE_PURPOSE (declspec_stack);
2340 declspec_stack = TREE_CHAIN (declspec_stack); }
2341 | typed_declspecs setspecs absdcl maybe_attribute
2342 { $$ = build_tree_list (build_tree_list (current_declspecs,
2344 build_tree_list (prefix_attributes,
2346 current_declspecs = TREE_VALUE (declspec_stack);
2347 prefix_attributes = TREE_PURPOSE (declspec_stack);
2348 declspec_stack = TREE_CHAIN (declspec_stack); }
2349 | declmods setspecs notype_declarator maybe_attribute
2350 { $$ = build_tree_list (build_tree_list (current_declspecs,
2352 build_tree_list (prefix_attributes,
2354 current_declspecs = TREE_VALUE (declspec_stack);
2355 prefix_attributes = TREE_PURPOSE (declspec_stack);
2356 declspec_stack = TREE_CHAIN (declspec_stack); }
2358 | declmods setspecs absdcl maybe_attribute
2359 { $$ = build_tree_list (build_tree_list (current_declspecs,
2361 build_tree_list (prefix_attributes,
2363 current_declspecs = TREE_VALUE (declspec_stack);
2364 prefix_attributes = TREE_PURPOSE (declspec_stack);
2365 declspec_stack = TREE_CHAIN (declspec_stack); }
2368 /* This is used in a function definition
2369 where either a parmlist or an identifier list is ok.
2370 Its value is a list of ..._TYPE nodes or a list of identifiers. */
2371 parmlist_or_identifiers:
2373 clear_parm_order ();
2374 declare_parm_level (1); }
2375 parmlist_or_identifiers_1
2377 parmlist_tags_warning ();
2378 poplevel (0, 0, 0); }
2381 parmlist_or_identifiers_1:
2385 for (t = $1; t; t = TREE_CHAIN (t))
2386 if (TREE_VALUE (t) == NULL_TREE)
2387 error ("`...' in old-style identifier list");
2388 $$ = tree_cons (NULL_TREE, NULL_TREE, $1); }
2391 /* A nonempty list of identifiers. */
2394 { $$ = build_tree_list (NULL_TREE, $1); }
2395 | identifiers ',' IDENTIFIER
2396 { $$ = chainon ($1, build_tree_list (NULL_TREE, $3)); }
2399 /* A nonempty list of identifiers, including typenames. */
2400 identifiers_or_typenames:
2402 { $$ = build_tree_list (NULL_TREE, $1); }
2403 | identifiers_or_typenames ',' identifier
2404 { $$ = chainon ($1, build_tree_list (NULL_TREE, $3)); }
2409 { $$ = SAVE_WARN_FLAGS();
2411 warn_pointer_arith = 0; }
2415 /* Objective-C productions. */
2425 if (objc_implementation_context)
2427 finish_class (objc_implementation_context);
2428 objc_ivar_chain = NULL_TREE;
2429 objc_implementation_context = NULL_TREE;
2432 warning ("`@end' must appear in an implementation context");
2436 /* A nonempty list of identifiers. */
2439 { $$ = build_tree_list (NULL_TREE, $1); }
2440 | identifier_list ',' identifier
2441 { $$ = chainon ($1, build_tree_list (NULL_TREE, $3)); }
2445 CLASS identifier_list ';'
2447 objc_declare_class ($2);
2451 ALIAS identifier identifier ';'
2453 objc_declare_alias ($2, $3);
2457 INTERFACE identifier protocolrefs '{'
2459 objc_interface_context = objc_ivar_context
2460 = start_class (CLASS_INTERFACE_TYPE, $2, NULL_TREE, $3);
2461 objc_public_flag = 0;
2465 continue_class (objc_interface_context);
2470 finish_class (objc_interface_context);
2471 objc_interface_context = NULL_TREE;
2474 | INTERFACE identifier protocolrefs
2476 objc_interface_context
2477 = start_class (CLASS_INTERFACE_TYPE, $2, NULL_TREE, $3);
2478 continue_class (objc_interface_context);
2483 finish_class (objc_interface_context);
2484 objc_interface_context = NULL_TREE;
2487 | INTERFACE identifier ':' identifier protocolrefs '{'
2489 objc_interface_context = objc_ivar_context
2490 = start_class (CLASS_INTERFACE_TYPE, $2, $4, $5);
2491 objc_public_flag = 0;
2495 continue_class (objc_interface_context);
2500 finish_class (objc_interface_context);
2501 objc_interface_context = NULL_TREE;
2504 | INTERFACE identifier ':' identifier protocolrefs
2506 objc_interface_context
2507 = start_class (CLASS_INTERFACE_TYPE, $2, $4, $5);
2508 continue_class (objc_interface_context);
2513 finish_class (objc_interface_context);
2514 objc_interface_context = NULL_TREE;
2517 | IMPLEMENTATION identifier '{'
2519 objc_implementation_context = objc_ivar_context
2520 = start_class (CLASS_IMPLEMENTATION_TYPE, $2, NULL_TREE, NULL_TREE);
2521 objc_public_flag = 0;
2526 = continue_class (objc_implementation_context);
2529 | IMPLEMENTATION identifier
2531 objc_implementation_context
2532 = start_class (CLASS_IMPLEMENTATION_TYPE, $2, NULL_TREE, NULL_TREE);
2534 = continue_class (objc_implementation_context);
2537 | IMPLEMENTATION identifier ':' identifier '{'
2539 objc_implementation_context = objc_ivar_context
2540 = start_class (CLASS_IMPLEMENTATION_TYPE, $2, $4, NULL_TREE);
2541 objc_public_flag = 0;
2546 = continue_class (objc_implementation_context);
2549 | IMPLEMENTATION identifier ':' identifier
2551 objc_implementation_context
2552 = start_class (CLASS_IMPLEMENTATION_TYPE, $2, $4, NULL_TREE);
2554 = continue_class (objc_implementation_context);
2557 | INTERFACE identifier '(' identifier ')' protocolrefs
2559 objc_interface_context
2560 = start_class (CATEGORY_INTERFACE_TYPE, $2, $4, $6);
2561 continue_class (objc_interface_context);
2566 finish_class (objc_interface_context);
2567 objc_interface_context = NULL_TREE;
2570 | IMPLEMENTATION identifier '(' identifier ')'
2572 objc_implementation_context
2573 = start_class (CATEGORY_IMPLEMENTATION_TYPE, $2, $4, NULL_TREE);
2575 = continue_class (objc_implementation_context);
2580 PROTOCOL identifier protocolrefs
2582 remember_protocol_qualifiers ();
2583 objc_interface_context
2584 = start_protocol(PROTOCOL_INTERFACE_TYPE, $2, $3);
2588 forget_protocol_qualifiers();
2589 finish_protocol(objc_interface_context);
2590 objc_interface_context = NULL_TREE;
2599 | non_empty_protocolrefs
2602 non_empty_protocolrefs:
2603 ARITHCOMPARE identifier_list ARITHCOMPARE
2605 if ($1 == LT_EXPR && $3 == GT_EXPR)
2613 ivar_decl_list visibility_spec ivar_decls
2618 PRIVATE { objc_public_flag = 2; }
2619 | PROTECTED { objc_public_flag = 0; }
2620 | PUBLIC { objc_public_flag = 1; }
2628 | ivar_decls ivar_decl ';'
2632 pedwarn ("extra semicolon in struct or union specified");
2637 /* There is a shift-reduce conflict here, because `components' may
2638 start with a `typename'. It happens that shifting (the default resolution)
2639 does the right thing, because it treats the `typename' as part of
2640 a `typed_typespecs'.
2642 It is possible that this same technique would allow the distinction
2643 between `notype_initdecls' and `initdecls' to be eliminated.
2644 But I am being cautious and not trying it. */
2647 typed_typespecs setspecs ivars
2649 current_declspecs = TREE_VALUE (declspec_stack);
2650 prefix_attributes = TREE_PURPOSE (declspec_stack);
2651 declspec_stack = TREE_CHAIN (declspec_stack); }
2652 | nonempty_type_quals setspecs ivars
2654 current_declspecs = TREE_VALUE (declspec_stack);
2655 prefix_attributes = TREE_PURPOSE (declspec_stack);
2656 declspec_stack = TREE_CHAIN (declspec_stack); }
2665 | ivars ',' ivar_declarator
2671 $$ = add_instance_variable (objc_ivar_context,
2673 $1, current_declspecs,
2676 | declarator ':' expr_no_commas
2678 $$ = add_instance_variable (objc_ivar_context,
2680 $1, current_declspecs, $3);
2682 | ':' expr_no_commas
2684 $$ = add_instance_variable (objc_ivar_context,
2687 current_declspecs, $2);
2694 remember_protocol_qualifiers ();
2695 if (objc_implementation_context)
2696 objc_inherit_code = CLASS_METHOD_DECL;
2698 fatal ("method definition not in class context");
2702 forget_protocol_qualifiers ();
2703 add_class_method (objc_implementation_context, $3);
2704 start_method_def ($3);
2705 objc_method_context = $3;
2709 continue_method_def ();
2713 finish_method_def ();
2714 objc_method_context = NULL_TREE;
2719 remember_protocol_qualifiers ();
2720 if (objc_implementation_context)
2721 objc_inherit_code = INSTANCE_METHOD_DECL;
2723 fatal ("method definition not in class context");
2727 forget_protocol_qualifiers ();
2728 add_instance_method (objc_implementation_context, $3);
2729 start_method_def ($3);
2730 objc_method_context = $3;
2734 continue_method_def ();
2738 finish_method_def ();
2739 objc_method_context = NULL_TREE;
2743 /* the reason for the strange actions in this rule
2744 is so that notype_initdecls when reached via datadef
2745 can find a valid list of type and sc specs in $0. */
2749 | {$<ttype>$ = NULL_TREE; } methodprotolist2
2752 methodprotolist2: /* eliminates a shift/reduce conflict */
2755 | methodprotolist2 methodproto
2756 | methodprotolist2 {$<ttype>$ = NULL_TREE; } datadef
2767 /* Remember protocol qualifiers in prototypes. */
2768 remember_protocol_qualifiers ();
2769 objc_inherit_code = CLASS_METHOD_DECL;
2773 /* Forget protocol qualifiers here. */
2774 forget_protocol_qualifiers ();
2775 add_class_method (objc_interface_context, $3);
2781 /* Remember protocol qualifiers in prototypes. */
2782 remember_protocol_qualifiers ();
2783 objc_inherit_code = INSTANCE_METHOD_DECL;
2787 /* Forget protocol qualifiers here. */
2788 forget_protocol_qualifiers ();
2789 add_instance_method (objc_interface_context, $3);
2795 '(' typename ')' unaryselector
2797 $$ = build_method_decl (objc_inherit_code, $2, $4, NULL_TREE);
2802 $$ = build_method_decl (objc_inherit_code, NULL_TREE, $1, NULL_TREE);
2805 | '(' typename ')' keywordselector optparmlist
2807 $$ = build_method_decl (objc_inherit_code, $2, $4, $5);
2810 | keywordselector optparmlist
2812 $$ = build_method_decl (objc_inherit_code, NULL_TREE, $1, $2);
2816 /* "optarglist" assumes that start_method_def has already been called...
2817 if it is not, the "xdecls" will not be placed in the proper scope */
2824 /* to get around the following situation: "int foo (int a) int b; {}" that
2825 is synthesized when parsing "- a:a b:b; id c; id d; { ... }" */
2840 typed_declspecs setspecs myparms ';'
2841 { current_declspecs = TREE_VALUE (declspec_stack);
2842 prefix_attributes = TREE_PURPOSE (declspec_stack);
2843 declspec_stack = TREE_CHAIN (declspec_stack); }
2844 | typed_declspecs ';'
2845 { shadow_tag ($1); }
2847 { pedwarn ("empty declaration"); }
2852 { push_parm_decl ($1); }
2853 | myparms ',' myparm
2854 { push_parm_decl ($3); }
2857 /* A single parameter declaration or parameter type name,
2858 as found in a parmlist. DOES NOT ALLOW AN INITIALIZER OR ASMSPEC */
2861 parm_declarator maybe_attribute
2862 { $$ = build_tree_list (build_tree_list (current_declspecs,
2864 build_tree_list (prefix_attributes,
2866 | notype_declarator maybe_attribute
2867 { $$ = build_tree_list (build_tree_list (current_declspecs,
2869 build_tree_list (prefix_attributes,
2871 | absdcl maybe_attribute
2872 { $$ = build_tree_list (build_tree_list (current_declspecs,
2874 build_tree_list (prefix_attributes,
2885 /* oh what a kludge! */
2886 $$ = objc_ellipsis_node;
2894 /* returns a tree list node generated by get_parm_info */
2907 | keywordselector keyworddecl
2909 $$ = chainon ($1, $2);
2921 ENUM { $$ = get_identifier (token_buffer); }
2922 | STRUCT { $$ = get_identifier (token_buffer); }
2923 | UNION { $$ = get_identifier (token_buffer); }
2924 | IF { $$ = get_identifier (token_buffer); }
2925 | ELSE { $$ = get_identifier (token_buffer); }
2926 | WHILE { $$ = get_identifier (token_buffer); }
2927 | DO { $$ = get_identifier (token_buffer); }
2928 | FOR { $$ = get_identifier (token_buffer); }
2929 | SWITCH { $$ = get_identifier (token_buffer); }
2930 | CASE { $$ = get_identifier (token_buffer); }
2931 | DEFAULT { $$ = get_identifier (token_buffer); }
2932 | BREAK { $$ = get_identifier (token_buffer); }
2933 | CONTINUE { $$ = get_identifier (token_buffer); }
2934 | RETURN { $$ = get_identifier (token_buffer); }
2935 | GOTO { $$ = get_identifier (token_buffer); }
2936 | ASM_KEYWORD { $$ = get_identifier (token_buffer); }
2937 | SIZEOF { $$ = get_identifier (token_buffer); }
2938 | TYPEOF { $$ = get_identifier (token_buffer); }
2939 | ALIGNOF { $$ = get_identifier (token_buffer); }
2940 | TYPESPEC | TYPE_QUAL
2944 selector ':' '(' typename ')' identifier
2946 $$ = build_keyword_decl ($1, $4, $6);
2949 | selector ':' identifier
2951 $$ = build_keyword_decl ($1, NULL_TREE, $3);
2954 | ':' '(' typename ')' identifier
2956 $$ = build_keyword_decl (NULL_TREE, $3, $5);
2961 $$ = build_keyword_decl (NULL_TREE, NULL_TREE, $2);
2972 | keywordarglist keywordarg
2974 $$ = chainon ($1, $2);
2982 if (TREE_CHAIN ($1) == NULL_TREE)
2983 /* just return the expr., remove a level of indirection */
2984 $$ = TREE_VALUE ($1);
2986 /* we have a comma expr., we will collapse later */
2992 selector ':' keywordexpr
2994 $$ = build_tree_list ($1, $3);
2998 $$ = build_tree_list (NULL_TREE, $2);
3006 $$ = get_class_reference ($1);
3012 { objc_receiver_context = 1; }
3014 { objc_receiver_context = 0; }
3017 $$ = build_tree_list ($3, $5);
3028 | keywordnamelist keywordname
3030 $$ = chainon ($1, $2);
3037 $$ = build_tree_list ($1, NULL_TREE);
3041 $$ = build_tree_list (NULL_TREE, NULL_TREE);
3046 SELECTOR '(' selectorarg ')'
3053 PROTOCOL '(' identifier ')'
3059 /* extension to support C-structures in the archiver */
3062 ENCODE '(' typename ')'
3064 $$ = groktypename ($3);