1 /* YACC parser for C syntax and for Objective C. -*-c-*-
2 Copyright (C) 1987, 1988, 1989, 1992 Free Software Foundation, Inc.
4 This file is part of GNU CC.
6 GNU CC is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2, or (at your option)
11 GNU CC is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with GNU CC; see the file COPYING. If not, write to
18 the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
20 /* This file defines the grammar of C and that of Objective C.
21 ifobjc ... end ifobjc conditionals contain code for Objective C only.
22 ifc ... end ifc conditionals contain code for C only.
23 Sed commands in Makefile.in are used to convert this file into
24 c-parse.y and into objc-parse.y. */
26 /* To whomever it may concern: I have heard that such a thing was once
27 written by AT&T, but I have never seen it. */
35 /* These are the 8 conflicts you should get in parse.output;
36 the state numbers may vary if minor changes in the grammar are made.
38 State 41 contains 1 shift/reduce conflict. (Two ways to recover from error.)
39 State 92 contains 1 shift/reduce conflict. (Two ways to recover from error.)
40 State 99 contains 1 shift/reduce conflict. (Two ways to recover from error.)
41 State 103 contains 1 shift/reduce conflict. (Two ways to recover from error.)
42 State 119 contains 1 shift/reduce conflict. (See comment at component_decl.)
43 State 183 contains 1 shift/reduce conflict. (Two ways to recover from error.)
44 State 193 contains 1 shift/reduce conflict. (Two ways to recover from error.)
45 State 199 contains 1 shift/reduce conflict. (Two ways to recover from error.)
61 #ifdef MULTIBYTE_CHARS
70 /* Since parsers are distinct for each language, put the language string
73 char *language_string = "GNU Obj-C";
76 char *language_string = "GNU C";
85 /* Like YYERROR but do call yyerror. */
86 #define YYERROR1 { yyerror ("syntax error"); YYERROR; }
88 /* Cause the `yydebug' variable to be defined. */
94 %union {long itype; tree ttype; enum tree_code code;
95 char *filename; int lineno; }
97 /* All identifiers that are not reserved words
98 and are not declared typedefs in the current block */
101 /* All identifiers that are declared typedefs in the current block.
102 In some contexts, they are treated just like IDENTIFIER,
103 but they can also serve as typespecs in declarations. */
106 /* Reserved words that specify storage class.
107 yylval contains an IDENTIFIER_NODE which indicates which one. */
110 /* Reserved words that specify type.
111 yylval contains an IDENTIFIER_NODE which indicates which one. */
114 /* Reserved words that qualify type: "const" or "volatile".
115 yylval contains an IDENTIFIER_NODE which indicates which one. */
118 /* Character or numeric constants.
119 yylval is the node for the constant. */
122 /* String constants in raw form.
123 yylval is a STRING_CST node. */
126 /* "...", used for functions with variable arglists. */
129 /* the reserved words */
130 /* SCO include files test "ASM", so use something else. */
131 %token SIZEOF ENUM STRUCT UNION IF ELSE WHILE DO FOR SWITCH CASE DEFAULT
132 %token BREAK CONTINUE RETURN GOTO ASM_KEYWORD TYPEOF ALIGNOF ALIGN
133 %token ATTRIBUTE EXTENSION LABEL
134 %token REALPART IMAGPART
136 /* Add precedence rules to solve dangling else s/r conflict */
140 /* Define the operator tokens and their precedences.
141 The value is an integer because, if used, it is the tree code
142 to use in the expression made from the operator. */
144 %right <code> ASSIGN '='
145 %right <code> '?' ':'
151 %left <code> EQCOMPARE
152 %left <code> ARITHCOMPARE
153 %left <code> LSHIFT RSHIFT
155 %left <code> '*' '/' '%'
156 %right <code> UNARY PLUSPLUS MINUSMINUS
158 %left <code> POINTSAT '.' '(' '['
160 /* The Objective-C keywords. These are included in C and in
161 Objective C, so that the token codes are the same in both. */
162 %token INTERFACE IMPLEMENTATION END SELECTOR DEFS ENCODE
163 %token CLASSNAME PUBLIC PRIVATE PROTECTED PROTOCOL OBJECTNAME CLASS ALIAS
165 /* Objective-C string constants in raw form.
166 yylval is an OBJC_STRING_CST node. */
172 %type <ttype> identifier IDENTIFIER TYPENAME CONSTANT expr nonnull_exprlist exprlist
173 %type <ttype> expr_no_commas cast_expr unary_expr primary string STRING
174 %type <ttype> typed_declspecs reserved_declspecs
175 %type <ttype> typed_typespecs reserved_typespecquals
176 %type <ttype> declmods typespec typespecqual_reserved
177 %type <ttype> SCSPEC TYPESPEC TYPE_QUAL nonempty_type_quals maybe_type_qual
178 %type <ttype> initdecls notype_initdecls initdcl notype_initdcl
179 %type <ttype> init maybeasm
180 %type <ttype> asm_operands nonnull_asm_operands asm_operand asm_clobbers
181 %type <ttype> maybe_attribute attribute_list attrib
183 %type <ttype> compstmt
185 %type <ttype> declarator
186 %type <ttype> notype_declarator after_type_declarator
187 %type <ttype> parm_declarator
189 %type <ttype> structsp component_decl_list component_decl_list2
190 %type <ttype> component_decl components component_declarator
191 %type <ttype> enumlist enumerator
192 %type <ttype> typename absdcl absdcl1 type_quals
193 %type <ttype> xexpr parms parm identifiers
195 %type <ttype> parmlist parmlist_1 parmlist_2
196 %type <ttype> parmlist_or_identifiers parmlist_or_identifiers_1
197 %type <ttype> identifiers_or_typenames
199 %type <itype> setspecs
201 %type <filename> save_filename
202 %type <lineno> save_lineno
205 /* the Objective-C nonterminals */
207 %type <ttype> ivar_decl_list ivar_decls ivar_decl ivars ivar_declarator
208 %type <ttype> methoddecl unaryselector keywordselector selector
209 %type <ttype> keyworddecl receiver objcmessageexpr messageargs
210 %type <ttype> keywordexpr keywordarglist keywordarg
211 %type <ttype> myparms myparm optparmlist reservedwords objcselectorexpr
212 %type <ttype> selectorarg keywordnamelist keywordname objcencodeexpr
213 %type <ttype> objc_string protocolrefs identifier_list objcprotocolexpr
214 %type <ttype> CLASSNAME OBJC_STRING OBJECTNAME
218 /* Number of statements (loosely speaking) seen so far. */
219 static int stmt_count;
221 /* Input file and line number of the end of the body of last simple_if;
222 used by the stmt-rule immediately after simple_if returns. */
223 static char *if_stmt_file;
224 static int if_stmt_line;
226 /* List of types and structure classes of the current declaration. */
227 static tree current_declspecs;
229 /* Stack of saved values of current_declspecs. */
230 static tree declspec_stack;
232 /* 1 if we explained undeclared var errors. */
233 static int undeclared_variable_notice;
236 /* Objective-C specific information */
238 tree objc_interface_context;
239 tree objc_implementation_context;
240 tree objc_method_context;
241 tree objc_ivar_chain;
242 tree objc_ivar_context;
243 enum tree_code objc_inherit_code;
244 int objc_receiver_context;
245 int objc_public_flag;
249 /* Tell yyparse how to print a token's value, if yydebug is set. */
251 #define YYPRINT(FILE,YYCHAR,YYLVAL) yyprint(FILE,YYCHAR,YYLVAL)
252 extern void yyprint ();
258 pedwarn ("ANSI C forbids an empty source file");
265 /* In case there were missing closebraces,
266 get us back to the global binding level. */
267 while (! global_bindings_p ())
275 /* the reason for the strange actions in this rule
276 is so that notype_initdecls when reached via datadef
277 can find a valid list of type and sc specs in $0. */
280 {$<ttype>$ = NULL_TREE; } extdef
281 | extdefs {$<ttype>$ = NULL_TREE; } extdef
290 | ASM_KEYWORD '(' expr ')' ';'
292 if ((TREE_CODE ($3) == ADDR_EXPR
293 && TREE_CODE (TREE_OPERAND ($3, 0)) == STRING_CST)
294 || TREE_CODE ($3) == STRING_CST)
297 error ("argument of `asm' is not a constant string"); }
301 setspecs notype_initdecls ';'
303 error ("ANSI C forbids data definition with no type or storage class");
304 else if (!flag_traditional)
305 warning ("data definition has no type or storage class"); }
306 | declmods setspecs notype_initdecls ';'
308 | typed_declspecs setspecs initdecls ';'
311 { pedwarn ("empty declaration"); }
312 | typed_declspecs ';'
318 pedwarn ("ANSI C does not allow extra `;' outside of a function"); }
322 typed_declspecs setspecs declarator
323 { if (! start_function ($1, $3, 0))
325 reinit_parse_for_function (); }
327 { store_parm_decls (); }
329 { finish_function (0); }
330 | typed_declspecs setspecs declarator error
332 | declmods setspecs notype_declarator
333 { if (! start_function ($1, $3, 0))
335 reinit_parse_for_function (); }
337 { store_parm_decls (); }
339 { finish_function (0); }
340 | declmods setspecs notype_declarator error
342 | setspecs notype_declarator
343 { if (! start_function (NULL_TREE, $2, 0))
345 reinit_parse_for_function (); }
347 { store_parm_decls (); }
349 { finish_function (0); }
350 | setspecs notype_declarator error
366 { $$ = NEGATE_EXPR; }
368 { $$ = CONVERT_EXPR; }
370 { $$ = PREINCREMENT_EXPR; }
372 { $$ = PREDECREMENT_EXPR; }
374 { $$ = BIT_NOT_EXPR; }
376 { $$ = TRUTH_NOT_EXPR; }
379 expr: nonnull_exprlist
380 { $$ = build_compound_expr ($1); }
391 { $$ = build_tree_list (NULL_TREE, $1); }
392 | nonnull_exprlist ',' expr_no_commas
393 { chainon ($1, build_tree_list (NULL_TREE, $3)); }
398 | '*' cast_expr %prec UNARY
399 { $$ = build_indirect_ref ($2, "unary *"); }
400 /* __extension__ turns off -pedantic for following primary. */
402 { $<itype>1 = pedantic;
404 cast_expr %prec UNARY
406 pedantic = $<itype>1; }
407 | unop cast_expr %prec UNARY
408 { $$ = build_unary_op ($1, $2, 0);
409 overflow_warning ($$); }
410 /* Refer to the address of a label as a pointer. */
412 { tree label = lookup_label ($2);
414 $$ = null_pointer_node;
417 TREE_USED (label) = 1;
418 $$ = build1 (ADDR_EXPR, ptr_type_node, label);
419 TREE_CONSTANT ($$) = 1;
422 /* This seems to be impossible on some machines, so let's turn it off.
423 You can use __builtin_next_arg to find the anonymous stack args.
425 { tree types = TYPE_ARG_TYPES (TREE_TYPE (current_function_decl));
426 $$ = error_mark_node;
427 if (TREE_VALUE (tree_last (types)) == void_type_node)
428 error ("`&...' used in function with fixed number of arguments");
432 pedwarn ("ANSI C forbids `&...'");
433 $$ = tree_last (DECL_ARGUMENTS (current_function_decl));
434 $$ = build_unary_op (ADDR_EXPR, $$, 0);
437 | SIZEOF unary_expr %prec UNARY
438 { if (TREE_CODE ($2) == COMPONENT_REF
439 && DECL_BIT_FIELD (TREE_OPERAND ($2, 1)))
440 error ("`sizeof' applied to a bit-field");
441 $$ = c_sizeof (TREE_TYPE ($2)); }
442 | SIZEOF '(' typename ')' %prec HYPERUNARY
443 { $$ = c_sizeof (groktypename ($3)); }
444 | ALIGNOF unary_expr %prec UNARY
445 { $$ = c_alignof_expr ($2); }
446 | ALIGNOF '(' typename ')' %prec HYPERUNARY
447 { $$ = c_alignof (groktypename ($3)); }
448 | REALPART cast_expr %prec UNARY
449 { $$ = build_unary_op (REALPART_EXPR, $2, 0); }
450 | IMAGPART cast_expr %prec UNARY
451 { $$ = build_unary_op (IMAGPART_EXPR, $2, 0); }
456 | '(' typename ')' cast_expr %prec UNARY
457 { tree type = groktypename ($2);
458 $$ = build_c_cast (type, $4); }
459 | '(' typename ')' '{'
460 { start_init (NULL_TREE, NULL, 0);
461 $2 = groktypename ($2);
462 really_start_incremental_init ($2); }
463 initlist_maybe_comma '}' %prec UNARY
465 tree result = pop_init_level (0);
470 pedwarn ("ANSI C forbids constructor expressions");
471 if (TYPE_NAME (type) != 0)
473 if (TREE_CODE (TYPE_NAME (type)) == IDENTIFIER_NODE)
474 name = IDENTIFIER_POINTER (TYPE_NAME (type));
476 name = IDENTIFIER_POINTER (DECL_NAME (TYPE_NAME (type)));
481 if (TREE_CODE (type) == ARRAY_TYPE && TYPE_SIZE (type) == 0)
483 int failure = complete_array_type (type, $$, 1);
492 | expr_no_commas '+' expr_no_commas
493 { $$ = parser_build_binary_op ($2, $1, $3); }
494 | expr_no_commas '-' expr_no_commas
495 { $$ = parser_build_binary_op ($2, $1, $3); }
496 | expr_no_commas '*' expr_no_commas
497 { $$ = parser_build_binary_op ($2, $1, $3); }
498 | expr_no_commas '/' expr_no_commas
499 { $$ = parser_build_binary_op ($2, $1, $3); }
500 | expr_no_commas '%' expr_no_commas
501 { $$ = parser_build_binary_op ($2, $1, $3); }
502 | expr_no_commas LSHIFT expr_no_commas
503 { $$ = parser_build_binary_op ($2, $1, $3); }
504 | expr_no_commas RSHIFT expr_no_commas
505 { $$ = parser_build_binary_op ($2, $1, $3); }
506 | expr_no_commas ARITHCOMPARE expr_no_commas
507 { $$ = parser_build_binary_op ($2, $1, $3); }
508 | expr_no_commas EQCOMPARE expr_no_commas
509 { $$ = parser_build_binary_op ($2, $1, $3); }
510 | expr_no_commas '&' expr_no_commas
511 { $$ = parser_build_binary_op ($2, $1, $3); }
512 | expr_no_commas '|' expr_no_commas
513 { $$ = parser_build_binary_op ($2, $1, $3); }
514 | expr_no_commas '^' expr_no_commas
515 { $$ = parser_build_binary_op ($2, $1, $3); }
516 | expr_no_commas ANDAND expr_no_commas
517 { $$ = parser_build_binary_op (TRUTH_ANDIF_EXPR, $1, $3); }
518 | expr_no_commas OROR expr_no_commas
519 { $$ = parser_build_binary_op (TRUTH_ORIF_EXPR, $1, $3); }
520 | expr_no_commas '?' xexpr ':' expr_no_commas
521 { $$ = build_conditional_expr ($1, $3, $5); }
522 | expr_no_commas '=' expr_no_commas
523 { $$ = build_modify_expr ($1, NOP_EXPR, $3);
524 C_SET_EXP_ORIGINAL_CODE ($$, MODIFY_EXPR); }
525 | expr_no_commas ASSIGN expr_no_commas
526 { $$ = build_modify_expr ($1, $2, $3);
527 /* This inhibits warnings in truthvalue_conversion. */
528 C_SET_EXP_ORIGINAL_CODE ($$, ERROR_MARK); }
537 if (!$$ || $$ == error_mark_node)
539 if (yychar == YYEMPTY)
546 if (objc_receiver_context
547 && ! (objc_receiver_context
548 && strcmp (IDENTIFIER_POINTER ($1), "super")))
549 /* we have a message to super */
550 $$ = get_super_receiver ();
551 else if (objc_method_context
552 && (decl = is_ivar (objc_ivar_chain, $1)))
554 if (is_private (decl))
555 $$ = error_mark_node;
557 $$ = build_ivar_reference ($1);
562 /* Ordinary implicit function declaration. */
563 $$ = implicitly_declare ($1);
564 assemble_external ($$);
568 else if (current_function_decl == 0)
570 error ("`%s' undeclared here (not in a function)",
571 IDENTIFIER_POINTER ($1));
572 $$ = error_mark_node;
579 if (objc_receiver_context
580 && ! strcmp (IDENTIFIER_POINTER ($1), "super"))
581 /* we have a message to super */
582 $$ = get_super_receiver ();
583 else if (objc_method_context
584 && (decl = is_ivar (objc_ivar_chain, $1)))
586 if (is_private (decl))
587 $$ = error_mark_node;
589 $$ = build_ivar_reference ($1);
594 if (IDENTIFIER_GLOBAL_VALUE ($1) != error_mark_node
595 || IDENTIFIER_ERROR_LOCUS ($1) != current_function_decl)
597 error ("`%s' undeclared (first use this function)",
598 IDENTIFIER_POINTER ($1));
600 if (! undeclared_variable_notice)
602 error ("(Each undeclared identifier is reported only once");
603 error ("for each function it appears in.)");
604 undeclared_variable_notice = 1;
607 $$ = error_mark_node;
608 /* Prevent repeated error messages. */
609 IDENTIFIER_GLOBAL_VALUE ($1) = error_mark_node;
610 IDENTIFIER_ERROR_LOCUS ($1) = current_function_decl;
614 else if (TREE_TYPE ($$) == error_mark_node)
615 $$ = error_mark_node;
616 else if (C_DECL_ANTICIPATED ($$))
618 /* The first time we see a build-in function used,
619 if it has not been declared. */
620 C_DECL_ANTICIPATED ($$) = 0;
621 if (yychar == YYEMPTY)
625 /* Omit the implicit declaration we
626 would ordinarily do, so we don't lose
627 the actual built in type.
628 But print a diagnostic for the mismatch. */
630 if (objc_method_context
631 && is_ivar (objc_ivar_chain, $1))
632 error ("Instance variable `%s' implicitly declared as function",
633 IDENTIFIER_POINTER (DECL_NAME ($$)));
636 if (TREE_CODE ($$) != FUNCTION_DECL)
637 error ("`%s' implicitly declared as function",
638 IDENTIFIER_POINTER (DECL_NAME ($$)));
639 else if ((TYPE_MODE (TREE_TYPE (TREE_TYPE ($$)))
640 != TYPE_MODE (integer_type_node))
641 && (TREE_TYPE (TREE_TYPE ($$))
643 pedwarn ("type mismatch in implicit declaration for built-in function `%s'",
644 IDENTIFIER_POINTER (DECL_NAME ($$)));
645 /* If it really returns void, change that to int. */
646 if (TREE_TYPE (TREE_TYPE ($$)) == void_type_node)
648 = build_function_type (integer_type_node,
649 TYPE_ARG_TYPES (TREE_TYPE ($$)));
652 pedwarn ("built-in function `%s' used without declaration",
653 IDENTIFIER_POINTER (DECL_NAME ($$)));
655 /* Do what we would ordinarily do when a fn is used. */
656 assemble_external ($$);
661 assemble_external ($$);
664 /* we have a definition - still check if iVariable */
666 if (!objc_receiver_context
667 || (objc_receiver_context
668 && strcmp (IDENTIFIER_POINTER ($1), "super")))
672 if (objc_method_context
673 && (decl = is_ivar (objc_ivar_chain, $1)))
675 if (IDENTIFIER_LOCAL_VALUE ($1))
676 warning ("local declaration of `%s' hides instance variable",
677 IDENTIFIER_POINTER ($1));
680 if (is_private (decl))
681 $$ = error_mark_node;
683 $$ = build_ivar_reference ($1);
687 else /* we have a message to super */
688 $$ = get_super_receiver ();
692 if (TREE_CODE ($$) == CONST_DECL)
694 $$ = DECL_INITIAL ($$);
695 /* This is to prevent an enum whose value is 0
696 from being considered a null pointer constant. */
697 $$ = build1 (NOP_EXPR, TREE_TYPE ($$), $$);
698 TREE_CONSTANT ($$) = 1;
703 { $$ = combine_strings ($1); }
705 { char class = TREE_CODE_CLASS (TREE_CODE ($2));
706 if (class == 'e' || class == '1'
707 || class == '2' || class == '<')
708 C_SET_EXP_ORIGINAL_CODE ($2, ERROR_MARK);
711 { $$ = error_mark_node; }
713 { if (current_function_decl == 0)
715 error ("braced-group within expression allowed only inside a function");
718 /* We must force a BLOCK for this level
719 so that, if it is not expanded later,
720 there is a way to turn off the entire subtree of blocks
721 that are contained in it. */
723 push_iterator_stack ();
725 $<ttype>$ = expand_start_stmt_expr (); }
729 pedwarn ("ANSI C forbids braced-groups within expressions");
730 pop_iterator_stack ();
732 rtl_exp = expand_end_stmt_expr ($<ttype>2);
733 /* The statements have side effects, so the group does. */
734 TREE_SIDE_EFFECTS (rtl_exp) = 1;
736 if (TREE_CODE ($3) == BLOCK)
738 /* Make a BIND_EXPR for the BLOCK already made. */
739 $$ = build (BIND_EXPR, TREE_TYPE (rtl_exp),
740 NULL_TREE, rtl_exp, $3);
741 /* Remove the block from the tree at this point.
742 It gets put back at the proper place
743 when the BIND_EXPR is expanded. */
749 | primary '(' exprlist ')' %prec '.'
750 { $$ = build_function_call ($1, $3); }
751 | primary '[' expr ']' %prec '.'
752 { $$ = build_array_ref ($1, $3); }
753 | primary '.' identifier
756 if (doing_objc_thang)
758 if (is_public ($1, $3))
759 $$ = build_component_ref ($1, $3);
761 $$ = error_mark_node;
765 $$ = build_component_ref ($1, $3);
767 | primary POINTSAT identifier
769 tree expr = build_indirect_ref ($1, "->");
772 if (doing_objc_thang)
774 if (is_public (expr, $3))
775 $$ = build_component_ref (expr, $3);
777 $$ = error_mark_node;
781 $$ = build_component_ref (expr, $3);
784 { $$ = build_unary_op (POSTINCREMENT_EXPR, $1, 0); }
786 { $$ = build_unary_op (POSTDECREMENT_EXPR, $1, 0); }
789 { $$ = build_message_expr ($1); }
791 { $$ = build_selector_expr ($1); }
793 { $$ = build_protocol_expr ($1); }
795 { $$ = build_encode_expr ($1); }
797 { $$ = build_objc_string_object ($1); }
801 /* Produces a STRING_CST with perhaps more STRING_CSTs chained onto it. */
805 { $$ = chainon ($1, $2); }
809 /* Produces an OBJC_STRING_CST with prehaps more OBJC_STRING_CSTs chained
813 | objc_string OBJC_STRING
814 { $$ = chainon ($1, $2); }
822 /* ... is used here to indicate a varargs function. */
825 pedwarn ("ANSI C does not permit use of `varargs.h'"); }
828 /* The following are analogous to lineno_decl, decls and decl
829 except that they do not allow nested functions.
830 They are used for old-style parm decls. */
832 save_filename save_lineno datadecl
839 | datadecls lineno_datadecl
840 | lineno_datadecl errstmt
844 typed_declspecs setspecs initdecls ';'
845 { current_declspecs = TREE_VALUE (declspec_stack);
846 declspec_stack = TREE_CHAIN (declspec_stack);
847 resume_momentary ($2); }
848 | declmods setspecs notype_initdecls ';'
849 { current_declspecs = TREE_VALUE (declspec_stack);
850 declspec_stack = TREE_CHAIN (declspec_stack);
851 resume_momentary ($2); }
852 | typed_declspecs ';'
853 { shadow_tag_warned ($1, 1);
854 pedwarn ("empty declaration"); }
856 { pedwarn ("empty declaration"); }
859 /* This combination which saves a lineno before a decl
860 is the normal thing to use, rather than decl itself.
861 This is to avoid shift/reduce conflicts in contexts
862 where statement labels are allowed. */
864 save_filename save_lineno decl
872 | lineno_decl errstmt
875 /* records the type and storage class specs to use for processing
876 the declarators that follow.
877 Maintains a stack of outer-level values of current_declspecs,
878 for the sake of parm declarations nested in function declarators. */
879 setspecs: /* empty */
880 { $$ = suspend_momentary ();
881 pending_xref_error ();
882 declspec_stack = tree_cons (NULL_TREE, current_declspecs,
884 current_declspecs = $<ttype>0; }
888 typed_declspecs setspecs initdecls ';'
889 { current_declspecs = TREE_VALUE (declspec_stack);
890 declspec_stack = TREE_CHAIN (declspec_stack);
891 resume_momentary ($2); }
892 | declmods setspecs notype_initdecls ';'
893 { current_declspecs = TREE_VALUE (declspec_stack);
894 declspec_stack = TREE_CHAIN (declspec_stack);
895 resume_momentary ($2); }
896 | typed_declspecs setspecs nested_function
897 { current_declspecs = TREE_VALUE (declspec_stack);
898 declspec_stack = TREE_CHAIN (declspec_stack);
899 resume_momentary ($2); }
900 | declmods setspecs notype_nested_function
901 { current_declspecs = TREE_VALUE (declspec_stack);
902 declspec_stack = TREE_CHAIN (declspec_stack);
903 resume_momentary ($2); }
904 | typed_declspecs ';'
907 { pedwarn ("empty declaration"); }
910 /* Declspecs which contain at least one type specifier or typedef name.
911 (Just `const' or `volatile' is not enough.)
912 A typedef'd name following these is taken as a name to be declared. */
915 typespec reserved_declspecs
916 { $$ = tree_cons (NULL_TREE, $1, $2); }
917 | declmods typespec reserved_declspecs
918 { $$ = chainon ($3, tree_cons (NULL_TREE, $2, $1)); }
921 reserved_declspecs: /* empty */
923 | reserved_declspecs typespecqual_reserved
924 { $$ = tree_cons (NULL_TREE, $2, $1); }
925 | reserved_declspecs SCSPEC
926 { if (extra_warnings)
927 warning ("`%s' is not at beginning of declaration",
928 IDENTIFIER_POINTER ($2));
929 $$ = tree_cons (NULL_TREE, $2, $1); }
932 /* List of just storage classes and type modifiers.
933 A declaration can start with just this, but then it cannot be used
934 to redeclare a typedef-name. */
938 { $$ = tree_cons (NULL_TREE, $1, NULL_TREE);
939 TREE_STATIC ($$) = 1; }
941 { $$ = tree_cons (NULL_TREE, $1, NULL_TREE); }
943 { $$ = tree_cons (NULL_TREE, $2, $1);
944 TREE_STATIC ($$) = 1; }
946 { if (extra_warnings && TREE_STATIC ($1))
947 warning ("`%s' is not at beginning of declaration",
948 IDENTIFIER_POINTER ($2));
949 $$ = tree_cons (NULL_TREE, $2, $1);
950 TREE_STATIC ($$) = TREE_STATIC ($1); }
954 /* Used instead of declspecs where storage classes are not allowed
955 (that is, for typenames and structure components).
956 Don't accept a typedef-name if anything but a modifier precedes it. */
959 typespec reserved_typespecquals
960 { $$ = tree_cons (NULL_TREE, $1, $2); }
961 | nonempty_type_quals typespec reserved_typespecquals
962 { $$ = chainon ($3, tree_cons (NULL_TREE, $2, $1)); }
965 reserved_typespecquals: /* empty */
967 | reserved_typespecquals typespecqual_reserved
968 { $$ = tree_cons (NULL_TREE, $2, $1); }
971 /* A typespec (but not a type qualifier).
972 Once we have seen one of these in a declaration,
973 if a typedef name appears then it is being redeclared. */
978 { /* For a typedef name, record the meaning, not the name.
979 In case of `foo foo, bar;'. */
980 $$ = lookup_name ($1); }
982 | CLASSNAME protocolrefs
983 { $$ = get_static_reference ($1, $2); }
984 | OBJECTNAME protocolrefs
985 { $$ = get_object_reference ($2); }
987 | TYPEOF '(' expr ')'
988 { $$ = TREE_TYPE ($3); }
989 | TYPEOF '(' typename ')'
990 { $$ = groktypename ($3); }
993 /* A typespec that is a reserved word, or a type qualifier. */
995 typespecqual_reserved: TYPESPEC
1002 | initdecls ',' initdcl
1007 | notype_initdecls ',' initdcl
1013 | ASM_KEYWORD '(' string ')'
1014 { if (TREE_CHAIN ($3)) $3 = combine_strings ($3);
1020 declarator maybeasm maybe_attribute '='
1021 { $<ttype>$ = start_decl ($1, current_declspecs, 1);
1022 start_init ($<ttype>$, $2, global_bindings_p ()); }
1024 /* Note how the declaration of the variable is in effect while its init is parsed! */
1026 decl_attributes ($<ttype>5, $3);
1027 finish_decl ($<ttype>5, $6, $2); }
1028 | declarator maybeasm maybe_attribute
1029 { tree d = start_decl ($1, current_declspecs, 0);
1030 decl_attributes (d, $3);
1031 finish_decl (d, NULL_TREE, $2); }
1035 notype_declarator maybeasm maybe_attribute '='
1036 { $<ttype>$ = start_decl ($1, current_declspecs, 1);
1037 start_init ($<ttype>$, $2, global_bindings_p ()); }
1039 /* Note how the declaration of the variable is in effect while its init is parsed! */
1041 decl_attributes ($<ttype>5, $3);
1042 finish_decl ($<ttype>5, $6, $2); }
1043 | notype_declarator maybeasm maybe_attribute
1044 { tree d = start_decl ($1, current_declspecs, 0);
1045 decl_attributes (d, $3);
1046 finish_decl (d, NULL_TREE, $2); }
1048 /* the * rules are dummies to accept the Apollo extended syntax
1049 so that the header files compile. */
1053 | ATTRIBUTE '(' '(' attribute_list ')' ')'
1059 { $$ = tree_cons (NULL_TREE, $1, NULL_TREE); }
1060 | attribute_list ',' attrib
1061 { $$ = tree_cons (NULL_TREE, $3, $1); }
1066 { if (strcmp (IDENTIFIER_POINTER ($1), "packed"))
1067 warning ("`%s' attribute directive ignored",
1068 IDENTIFIER_POINTER ($1));
1070 | IDENTIFIER '(' IDENTIFIER ')'
1071 { /* If not "mode (m)", then issue warning. */
1072 if (strcmp (IDENTIFIER_POINTER ($1), "mode") != 0)
1074 warning ("`%s' attribute directive ignored",
1075 IDENTIFIER_POINTER ($1));
1079 $$ = tree_cons ($1, $3, NULL_TREE); }
1080 | IDENTIFIER '(' CONSTANT ')'
1081 { /* if not "aligned(n)", then issue warning */
1082 if (strcmp (IDENTIFIER_POINTER ($1), "aligned") != 0
1083 || TREE_CODE ($3) != INTEGER_CST)
1085 warning ("`%s' attribute directive ignored",
1086 IDENTIFIER_POINTER ($1));
1090 $$ = tree_cons ($1, $3, NULL_TREE); }
1091 | IDENTIFIER '(' IDENTIFIER ',' CONSTANT ',' CONSTANT ')'
1092 { /* if not "format(...)", then issue warning */
1093 if (strcmp (IDENTIFIER_POINTER ($1), "format") != 0
1094 || TREE_CODE ($5) != INTEGER_CST
1095 || TREE_CODE ($7) != INTEGER_CST)
1097 warning ("`%s' attribute directive ignored",
1098 IDENTIFIER_POINTER ($1));
1104 tree_cons ($5, $7, NULL_TREE),
1109 /* Initializers. `init' is the entry point. */
1114 { really_start_incremental_init (NULL_TREE);
1115 /* Note that the call to clear_momentary
1116 is in process_init_element. */
1117 push_momentary (); }
1118 initlist_maybe_comma '}'
1119 { $$ = pop_init_level (0);
1123 { $$ = error_mark_node;
1127 /* `initlist_maybe_comma' is the guts of an initializer in braces. */
1128 initlist_maybe_comma:
1131 pedwarn ("ANSI C forbids empty initializer braces"); }
1132 | initlist1 maybecomma
1137 | initlist1 ',' initelt
1140 /* `initelt' is a single element of an initializer.
1141 It may use braces. */
1144 { process_init_element ($1); }
1146 { push_init_level (0); }
1147 initlist_maybe_comma '}'
1148 { process_init_element (pop_init_level (0)); }
1150 /* These are for labeled elements. The syntax for an array element
1151 initializer conflicts with the syntax for an Objective-C message,
1152 so don't include these productions in the Objective-C grammer. */
1154 | '[' expr_no_commas ELLIPSIS expr_no_commas ']' '='
1155 { set_init_index ($2, $4); }
1157 | '[' expr_no_commas ']' '='
1158 { set_init_index ($2, NULL_TREE); }
1162 { set_init_label ($1); }
1164 | '.' identifier '='
1165 { set_init_label ($2); }
1171 { push_c_function_context ();
1172 if (! start_function (current_declspecs, $1, 1))
1174 pop_c_function_context ();
1177 reinit_parse_for_function ();
1178 store_parm_decls (); }
1179 /* This used to use compstmt_or_error.
1180 That caused a bug with input `f(g) int g {}',
1181 where the use of YYERROR1 above caused an error
1182 which then was handled by compstmt_or_error.
1183 There followed a repeated execution of that same rule,
1184 which called YYERROR1 again, and so on. */
1186 { finish_function (1);
1187 pop_c_function_context (); }
1190 notype_nested_function:
1192 { push_c_function_context ();
1193 if (! start_function (current_declspecs, $1, 1))
1195 pop_c_function_context ();
1198 reinit_parse_for_function ();
1199 store_parm_decls (); }
1200 /* This used to use compstmt_or_error.
1201 That caused a bug with input `f(g) int g {}',
1202 where the use of YYERROR1 above caused an error
1203 which then was handled by compstmt_or_error.
1204 There followed a repeated execution of that same rule,
1205 which called YYERROR1 again, and so on. */
1207 { finish_function (1);
1208 pop_c_function_context (); }
1211 /* Any kind of declarator (thus, all declarators allowed
1212 after an explicit typespec). */
1215 after_type_declarator
1219 /* A declarator that is allowed only after an explicit typespec. */
1221 after_type_declarator:
1222 '(' after_type_declarator ')'
1224 | after_type_declarator '(' parmlist_or_identifiers %prec '.'
1225 { $$ = build_nt (CALL_EXPR, $1, $3, NULL_TREE); }
1226 /* | after_type_declarator '(' error ')' %prec '.'
1227 { $$ = build_nt (CALL_EXPR, $1, NULL_TREE, NULL_TREE);
1228 poplevel (0, 0, 0); } */
1229 | after_type_declarator '[' expr ']' %prec '.'
1230 { $$ = build_nt (ARRAY_REF, $1, $3); }
1231 | after_type_declarator '[' ']' %prec '.'
1232 { $$ = build_nt (ARRAY_REF, $1, NULL_TREE); }
1233 | '*' type_quals after_type_declarator %prec UNARY
1234 { $$ = make_pointer_declarator ($2, $3); }
1241 /* Kinds of declarator that can appear in a parameter list
1242 in addition to notype_declarator. This is like after_type_declarator
1243 but does not allow a typedef name in parentheses as an identifier
1244 (because it would conflict with a function with that typedef as arg). */
1247 parm_declarator '(' parmlist_or_identifiers %prec '.'
1248 { $$ = build_nt (CALL_EXPR, $1, $3, NULL_TREE); }
1249 /* | parm_declarator '(' error ')' %prec '.'
1250 { $$ = build_nt (CALL_EXPR, $1, NULL_TREE, NULL_TREE);
1251 poplevel (0, 0, 0); } */
1252 | parm_declarator '[' expr ']' %prec '.'
1253 { $$ = build_nt (ARRAY_REF, $1, $3); }
1254 | parm_declarator '[' ']' %prec '.'
1255 { $$ = build_nt (ARRAY_REF, $1, NULL_TREE); }
1256 | '*' type_quals parm_declarator %prec UNARY
1257 { $$ = make_pointer_declarator ($2, $3); }
1261 /* A declarator allowed whether or not there has been
1262 an explicit typespec. These cannot redeclare a typedef-name. */
1265 notype_declarator '(' parmlist_or_identifiers %prec '.'
1266 { $$ = build_nt (CALL_EXPR, $1, $3, NULL_TREE); }
1267 /* | notype_declarator '(' error ')' %prec '.'
1268 { $$ = build_nt (CALL_EXPR, $1, NULL_TREE, NULL_TREE);
1269 poplevel (0, 0, 0); } */
1270 | '(' notype_declarator ')'
1272 | '*' type_quals notype_declarator %prec UNARY
1273 { $$ = make_pointer_declarator ($2, $3); }
1274 | notype_declarator '[' expr ']' %prec '.'
1275 { $$ = build_nt (ARRAY_REF, $1, $3); }
1276 | notype_declarator '[' ']' %prec '.'
1277 { $$ = build_nt (ARRAY_REF, $1, NULL_TREE); }
1282 STRUCT identifier '{'
1283 { $$ = start_struct (RECORD_TYPE, $2);
1284 /* Start scope of tag before parsing components. */
1286 component_decl_list '}'
1287 { $$ = finish_struct ($<ttype>4, $5);
1288 /* Really define the structure. */
1290 | STRUCT '{' component_decl_list '}'
1291 { $$ = finish_struct (start_struct (RECORD_TYPE, NULL_TREE),
1294 { $$ = xref_tag (RECORD_TYPE, $2); }
1295 | UNION identifier '{'
1296 { $$ = start_struct (UNION_TYPE, $2); }
1297 component_decl_list '}'
1298 { $$ = finish_struct ($<ttype>4, $5); }
1299 | UNION '{' component_decl_list '}'
1300 { $$ = finish_struct (start_struct (UNION_TYPE, NULL_TREE),
1303 { $$ = xref_tag (UNION_TYPE, $2); }
1304 | ENUM identifier '{'
1305 { $<itype>3 = suspend_momentary ();
1306 $$ = start_enum ($2); }
1307 enumlist maybecomma_warn '}'
1308 { $$ = finish_enum ($<ttype>4, nreverse ($5));
1309 resume_momentary ($<itype>3); }
1311 { $<itype>2 = suspend_momentary ();
1312 $$ = start_enum (NULL_TREE); }
1313 enumlist maybecomma_warn '}'
1314 { $$ = finish_enum ($<ttype>3, nreverse ($4));
1315 resume_momentary ($<itype>2); }
1317 { $$ = xref_tag (ENUMERAL_TYPE, $2); }
1328 { if (pedantic) pedwarn ("comma at end of enumerator list"); }
1331 component_decl_list:
1332 component_decl_list2
1334 | component_decl_list2 component_decl
1335 { $$ = chainon ($1, $2);
1336 pedwarn ("no semicolon at end of struct or union"); }
1339 component_decl_list2: /* empty */
1341 | component_decl_list2 component_decl ';'
1342 { $$ = chainon ($1, $2); }
1343 | component_decl_list2 ';'
1345 pedwarn ("extra semicolon in struct or union specified"); }
1347 /* foo(sizeof(struct{ @defs(ClassName)})); */
1348 | DEFS '(' CLASSNAME ')'
1350 tree interface = lookup_interface ($3);
1353 $$ = get_class_ivars (interface);
1356 error ("Cannot find interface declaration for `%s'",
1357 IDENTIFIER_POINTER ($3));
1364 /* There is a shift-reduce conflict here, because `components' may
1365 start with a `typename'. It happens that shifting (the default resolution)
1366 does the right thing, because it treats the `typename' as part of
1367 a `typed_typespecs'.
1369 It is possible that this same technique would allow the distinction
1370 between `notype_initdecls' and `initdecls' to be eliminated.
1371 But I am being cautious and not trying it. */
1374 typed_typespecs setspecs components
1376 current_declspecs = TREE_VALUE (declspec_stack);
1377 declspec_stack = TREE_CHAIN (declspec_stack);
1378 resume_momentary ($2); }
1381 pedwarn ("ANSI C forbids member declarations with no members");
1384 | nonempty_type_quals setspecs components
1386 current_declspecs = TREE_VALUE (declspec_stack);
1387 declspec_stack = TREE_CHAIN (declspec_stack);
1388 resume_momentary ($2); }
1389 | nonempty_type_quals
1391 pedwarn ("ANSI C forbids member declarations with no members");
1399 component_declarator
1400 | components ',' component_declarator
1401 { $$ = chainon ($1, $3); }
1404 component_declarator:
1405 save_filename save_lineno declarator maybe_attribute
1406 { $$ = grokfield ($1, $2, $3, current_declspecs, NULL_TREE);
1407 decl_attributes ($$, $4); }
1408 | save_filename save_lineno
1409 declarator ':' expr_no_commas maybe_attribute
1410 { $$ = grokfield ($1, $2, $3, current_declspecs, $5);
1411 decl_attributes ($$, $6); }
1412 | save_filename save_lineno ':' expr_no_commas maybe_attribute
1413 { $$ = grokfield ($1, $2, NULL_TREE, current_declspecs, $4);
1414 decl_attributes ($$, $5); }
1417 /* We chain the enumerators in reverse order.
1418 They are put in forward order where enumlist is used.
1419 (The order used to be significant, but no longer is so.
1420 However, we still maintain the order, just to be clean.) */
1424 | enumlist ',' enumerator
1425 { $$ = chainon ($3, $1); }
1431 { $$ = build_enumerator ($1, NULL_TREE); }
1432 | identifier '=' expr_no_commas
1433 { $$ = build_enumerator ($1, $3); }
1437 typed_typespecs absdcl
1438 { $$ = build_tree_list ($1, $2); }
1439 | nonempty_type_quals absdcl
1440 { $$ = build_tree_list ($1, $2); }
1443 absdcl: /* an absolute declarator */
1449 nonempty_type_quals:
1451 { $$ = tree_cons (NULL_TREE, $1, NULL_TREE); }
1452 | nonempty_type_quals TYPE_QUAL
1453 { $$ = tree_cons (NULL_TREE, $2, $1); }
1459 | type_quals TYPE_QUAL
1460 { $$ = tree_cons (NULL_TREE, $2, $1); }
1463 absdcl1: /* a nonempty absolute declarator */
1466 /* `(typedef)1' is `int'. */
1467 | '*' type_quals absdcl1 %prec UNARY
1468 { $$ = make_pointer_declarator ($2, $3); }
1469 | '*' type_quals %prec UNARY
1470 { $$ = make_pointer_declarator ($2, NULL_TREE); }
1471 | absdcl1 '(' parmlist %prec '.'
1472 { $$ = build_nt (CALL_EXPR, $1, $3, NULL_TREE); }
1473 | absdcl1 '[' expr ']' %prec '.'
1474 { $$ = build_nt (ARRAY_REF, $1, $3); }
1475 | absdcl1 '[' ']' %prec '.'
1476 { $$ = build_nt (ARRAY_REF, $1, NULL_TREE); }
1477 | '(' parmlist %prec '.'
1478 { $$ = build_nt (CALL_EXPR, NULL_TREE, $2, NULL_TREE); }
1479 | '[' expr ']' %prec '.'
1480 { $$ = build_nt (ARRAY_REF, NULL_TREE, $2); }
1482 { $$ = build_nt (ARRAY_REF, NULL_TREE, NULL_TREE); }
1485 /* at least one statement, the first of which parses without error. */
1486 /* stmts is used only after decls, so an invalid first statement
1487 is actually regarded as an invalid decl and part of the decls. */
1490 lineno_stmt_or_label
1491 | stmts lineno_stmt_or_label
1503 pushlevel: /* empty */
1504 { emit_line_note (input_filename, lineno);
1508 expand_start_bindings (0);
1510 if (objc_method_context)
1516 /* Read zero or more forward-declarations for labels
1517 that nested functions can jump to. */
1522 pedwarn ("ANSI C forbids label declarations"); }
1527 | label_decls label_decl
1531 LABEL identifiers_or_typenames ';'
1533 for (link = $2; link; link = TREE_CHAIN (link))
1535 tree label = shadow_label (TREE_VALUE (link));
1536 C_DECLARED_LABEL_FLAG (label) = 1;
1537 declare_nonlocal_label (label);
1542 /* This is the body of a function definition.
1543 It causes syntax errors to ignore to the next openbrace. */
1551 { $$ = convert (void_type_node, integer_zero_node); }
1552 | '{' pushlevel maybe_label_decls decls xstmts '}'
1553 { emit_line_note (input_filename, lineno);
1554 expand_end_bindings (getdecls (), 1, 0);
1555 $$ = poplevel (1, 1, 0);
1557 | '{' pushlevel maybe_label_decls error '}'
1558 { emit_line_note (input_filename, lineno);
1559 expand_end_bindings (getdecls (), kept_level_p (), 0);
1560 $$ = poplevel (kept_level_p (), 0, 0);
1562 | '{' pushlevel maybe_label_decls stmts '}'
1563 { emit_line_note (input_filename, lineno);
1564 expand_end_bindings (getdecls (), kept_level_p (), 0);
1565 $$ = poplevel (kept_level_p (), 0, 0);
1569 /* Value is number of statements counted as of the closeparen. */
1571 if_prefix lineno_labeled_stmt
1572 /* Make sure expand_end_cond is run once
1573 for each call to expand_start_cond.
1574 Otherwise a crash is likely. */
1580 { emit_line_note ($<filename>-1, $<lineno>0);
1581 expand_start_cond (truthvalue_conversion ($3), 0);
1582 $<itype>$ = stmt_count;
1583 if_stmt_file = $<filename>-1;
1584 if_stmt_line = $<lineno>0;
1585 position_after_white_space (); }
1588 /* This is a subroutine of stmt.
1589 It is used twice, once for valid DO statements
1590 and once for catching errors in parsing the end test. */
1594 emit_line_note ($<filename>-1, $<lineno>0);
1595 /* See comment in `while' alternative, above. */
1597 expand_start_loop_continue_elsewhere (1);
1598 position_after_white_space (); }
1599 lineno_labeled_stmt WHILE
1600 { expand_loop_continue_here (); }
1604 { $$ = input_filename; }
1611 lineno_labeled_stmt:
1612 save_filename save_lineno stmt
1614 /* | save_filename save_lineno error
1617 | save_filename save_lineno label lineno_labeled_stmt
1621 lineno_stmt_or_label:
1622 save_filename save_lineno stmt_or_label
1630 position_after_white_space ();
1631 next = getc (finput);
1632 ungetc (next, finput);
1633 if (pedantic && next == '}')
1634 pedwarn ("ANSI C forbids label at end of compound statement");
1638 /* Parse a single real statement, not including any labels. */
1645 emit_line_note ($<filename>-1, $<lineno>0);
1646 iterator_expand ($1);
1647 clear_momentary (); }
1649 { expand_start_else ();
1650 $<itype>1 = stmt_count;
1651 position_after_white_space (); }
1653 { expand_end_cond ();
1654 if (extra_warnings && stmt_count == $<itype>1)
1655 warning ("empty body in an else-statement"); }
1656 | simple_if %prec IF
1657 { expand_end_cond ();
1658 /* This warning is here instead of in simple_if, because we
1659 do not want a warning if an empty if is followed by an
1661 if (extra_warnings && stmt_count == $<itype>1)
1662 warning_with_file_and_line (if_stmt_file, if_stmt_line,
1663 "empty body in an if-statement"); }
1664 /* Make sure expand_end_cond is run once
1665 for each call to expand_start_cond.
1666 Otherwise a crash is likely. */
1667 | simple_if ELSE error
1668 { expand_end_cond (); }
1671 emit_line_note ($<filename>-1, $<lineno>0);
1672 /* The emit_nop used to come before emit_line_note,
1673 but that made the nop seem like part of the preceding line.
1674 And that was confusing when the preceding line was
1675 inside of an if statement and was not really executed.
1676 I think it ought to work to put the nop after the line number.
1677 We will see. --rms, July 15, 1991. */
1680 { /* Don't start the loop till we have succeeded
1681 in parsing the end test. This is to make sure
1682 that we end every loop we start. */
1683 expand_start_loop (1);
1684 emit_line_note (input_filename, lineno);
1685 expand_exit_loop_if_false (NULL_PTR,
1686 truthvalue_conversion ($4));
1687 position_after_white_space (); }
1689 { expand_end_loop (); }
1692 { emit_line_note (input_filename, lineno);
1693 expand_exit_loop_if_false (NULL_PTR,
1694 truthvalue_conversion ($3));
1696 clear_momentary (); }
1697 /* This rule is needed to make sure we end every loop we start. */
1698 | do_stmt_start error
1699 { expand_end_loop ();
1700 clear_momentary (); }
1704 emit_line_note ($<filename>-1, $<lineno>0);
1705 /* See comment in `while' alternative, above. */
1707 if ($3) c_expand_expr_stmt ($3);
1708 /* Next step is to call expand_start_loop_continue_elsewhere,
1709 but wait till after we parse the entire for (...).
1710 Otherwise, invalid input might cause us to call that
1711 fn without calling expand_end_loop. */
1714 /* Can't emit now; wait till after expand_start_loop... */
1715 { $<lineno>7 = lineno;
1716 $<filename>$ = input_filename; }
1719 /* Start the loop. Doing this after parsing
1720 all the expressions ensures we will end the loop. */
1721 expand_start_loop_continue_elsewhere (1);
1722 /* Emit the end-test, with a line number. */
1723 emit_line_note ($<filename>8, $<lineno>7);
1725 expand_exit_loop_if_false (NULL_PTR,
1726 truthvalue_conversion ($6));
1727 /* Don't let the tree nodes for $9 be discarded by
1728 clear_momentary during the parsing of the next stmt. */
1730 $<lineno>7 = lineno;
1731 $<filename>8 = input_filename;
1732 position_after_white_space (); }
1734 { /* Emit the increment expression, with a line number. */
1735 emit_line_note ($<filename>8, $<lineno>7);
1736 expand_loop_continue_here ();
1738 c_expand_expr_stmt ($9);
1740 expand_end_loop (); }
1741 | SWITCH '(' expr ')'
1743 emit_line_note ($<filename>-1, $<lineno>0);
1744 c_expand_start_case ($3);
1745 /* Don't let the tree nodes for $3 be discarded by
1746 clear_momentary during the parsing of the next stmt. */
1748 position_after_white_space (); }
1750 { expand_end_case ($3);
1754 emit_line_note ($<filename>-1, $<lineno>0);
1755 if ( ! expand_exit_something ())
1756 error ("break statement not within loop or switch"); }
1759 emit_line_note ($<filename>-1, $<lineno>0);
1760 if (! expand_continue_loop (NULL_PTR))
1761 error ("continue statement not within a loop"); }
1764 emit_line_note ($<filename>-1, $<lineno>0);
1765 c_expand_return (NULL_TREE); }
1768 emit_line_note ($<filename>-1, $<lineno>0);
1769 c_expand_return ($2); }
1770 | ASM_KEYWORD maybe_type_qual '(' expr ')' ';'
1772 emit_line_note ($<filename>-1, $<lineno>0);
1774 if ((TREE_CODE ($4) == ADDR_EXPR
1775 && TREE_CODE (TREE_OPERAND ($4, 0)) == STRING_CST)
1776 || TREE_CODE ($4) == STRING_CST)
1779 error ("argument of `asm' is not a constant string"); }
1780 /* This is the case with just output operands. */
1781 | ASM_KEYWORD maybe_type_qual '(' expr ':' asm_operands ')' ';'
1783 emit_line_note ($<filename>-1, $<lineno>0);
1784 c_expand_asm_operands ($4, $6, NULL_TREE, NULL_TREE,
1785 $2 == ridpointers[(int)RID_VOLATILE],
1786 input_filename, lineno); }
1787 /* This is the case with input operands as well. */
1788 | ASM_KEYWORD maybe_type_qual '(' expr ':' asm_operands ':' asm_operands ')' ';'
1790 emit_line_note ($<filename>-1, $<lineno>0);
1791 c_expand_asm_operands ($4, $6, $8, NULL_TREE,
1792 $2 == ridpointers[(int)RID_VOLATILE],
1793 input_filename, lineno); }
1794 /* This is the case with clobbered registers as well. */
1795 | ASM_KEYWORD maybe_type_qual '(' expr ':' asm_operands ':'
1796 asm_operands ':' asm_clobbers ')' ';'
1798 emit_line_note ($<filename>-1, $<lineno>0);
1799 c_expand_asm_operands ($4, $6, $8, $10,
1800 $2 == ridpointers[(int)RID_VOLATILE],
1801 input_filename, lineno); }
1802 | GOTO identifier ';'
1805 emit_line_note ($<filename>-1, $<lineno>0);
1806 decl = lookup_label ($2);
1809 TREE_USED (decl) = 1;
1815 emit_line_note ($<filename>-1, $<lineno>0);
1816 expand_computed_goto (convert (ptr_type_node, $3)); }
1821 all_iter_stmt_simple
1822 /* | all_iter_stmt_with_decl */
1825 all_iter_stmt_simple:
1828 /* The value returned by this action is */
1829 /* 1 if everything is OK */
1830 /* 0 in case of error or already bound iterator */
1833 if (TREE_CODE ($3) != VAR_DECL)
1834 error ("invalid `for (ITERATOR)' syntax");
1835 else if (! ITERATOR_P ($3))
1836 error ("`%s' is not an iterator",
1837 IDENTIFIER_POINTER (DECL_NAME ($3)));
1838 else if (ITERATOR_BOUND_P ($3))
1839 error ("`for (%s)' inside expansion of same iterator",
1840 IDENTIFIER_POINTER (DECL_NAME ($3)));
1844 iterator_for_loop_start ($3);
1850 iterator_for_loop_end ($3);
1853 /* This really should allow any kind of declaration,
1854 for generality. Fix it before turning it back on.
1856 all_iter_stmt_with_decl:
1857 FOR '(' ITERATOR pushlevel setspecs iterator_spec ')'
1859 */ /* The value returned by this action is */
1860 /* 1 if everything is OK */
1861 /* 0 in case of error or already bound iterator */
1863 iterator_for_loop_start ($6);
1867 iterator_for_loop_end ($6);
1868 emit_line_note (input_filename, lineno);
1869 expand_end_bindings (getdecls (), 1, 0);
1870 $<ttype>$ = poplevel (1, 1, 0);
1875 /* Any kind of label, including jump labels and case labels.
1876 ANSI C accepts labels only before statements, but we allow them
1877 also at the end of a compound statement. */
1879 label: CASE expr_no_commas ':'
1880 { register tree value = check_case_value ($2);
1882 = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE);
1886 if (value != error_mark_node)
1889 int success = pushcase (value, convert_and_check,
1892 error ("case label not within a switch statement");
1893 else if (success == 2)
1895 error ("duplicate case value");
1896 error_with_decl (duplicate, "this is the first entry for that value");
1898 else if (success == 3)
1899 warning ("case value out of range");
1900 else if (success == 5)
1901 error ("case label within scope of cleanup or variable array");
1903 position_after_white_space (); }
1904 | CASE expr_no_commas ELLIPSIS expr_no_commas ':'
1905 { register tree value1 = check_case_value ($2);
1906 register tree value2 = check_case_value ($4);
1908 = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE);
1912 if (value1 != error_mark_node && value2 != error_mark_node)
1915 int success = pushcase_range (value1, value2,
1916 convert_and_check, label,
1919 error ("case label not within a switch statement");
1920 else if (success == 2)
1922 error ("duplicate case value");
1923 error_with_decl (duplicate, "this is the first entry for that value");
1925 else if (success == 3)
1926 warning ("case value out of range");
1927 else if (success == 4)
1928 warning ("empty case range");
1929 else if (success == 5)
1930 error ("case label within scope of cleanup or variable array");
1932 position_after_white_space (); }
1937 = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE);
1938 int success = pushcase (NULL_TREE, 0, label, &duplicate);
1941 error ("default label not within a switch statement");
1942 else if (success == 2)
1944 error ("multiple default labels in one switch");
1945 error_with_decl (duplicate, "this is the first default label");
1947 position_after_white_space (); }
1949 { tree label = define_label (input_filename, lineno, $1);
1953 expand_label (label);
1954 position_after_white_space (); }
1957 /* Either a type-qualifier or nothing. First thing in an `asm' statement. */
1961 { emit_line_note (input_filename, lineno); }
1963 { emit_line_note (input_filename, lineno); }
1972 /* These are the operands other than the first string and colon
1973 in asm ("addextend %2,%1": "=dm" (x), "0" (y), "g" (*x)) */
1974 asm_operands: /* empty */
1976 | nonnull_asm_operands
1979 nonnull_asm_operands:
1981 | nonnull_asm_operands ',' asm_operand
1982 { $$ = chainon ($1, $3); }
1987 { $$ = build_tree_list ($1, $3); }
1992 { $$ = tree_cons (NULL_TREE, combine_strings ($1), NULL_TREE); }
1993 | asm_clobbers ',' string
1994 { $$ = tree_cons (NULL_TREE, combine_strings ($3), $1); }
1997 /* This is what appears inside the parens in a function declarator.
1998 Its value is a list of ..._TYPE nodes. */
2001 clear_parm_order ();
2002 declare_parm_level (0); }
2005 parmlist_tags_warning ();
2006 poplevel (0, 0, 0); }
2014 pedwarn ("ANSI C forbids forward parameter declarations");
2015 /* Mark the forward decls as such. */
2016 for (parm = getdecls (); parm; parm = TREE_CHAIN (parm))
2017 TREE_ASM_WRITTEN (parm) = 1;
2018 clear_parm_order (); }
2022 { $$ = tree_cons (NULL_TREE, NULL_TREE, NULL_TREE); }
2025 /* This is what appears inside the parens in a function declarator.
2026 Is value is represented in the format that grokdeclarator expects. */
2027 parmlist_2: /* empty */
2028 { $$ = get_parm_info (0); }
2030 { $$ = get_parm_info (0);
2032 pedwarn ("ANSI C requires a named argument before `...'");
2035 { $$ = get_parm_info (1); }
2036 | parms ',' ELLIPSIS
2037 { $$ = get_parm_info (0); }
2042 { push_parm_decl ($1); }
2044 { push_parm_decl ($3); }
2047 /* A single parameter declaration or parameter type name,
2048 as found in a parmlist. */
2050 typed_declspecs parm_declarator
2051 { $$ = build_tree_list ($1, $2) ; }
2052 | typed_declspecs notype_declarator
2053 { $$ = build_tree_list ($1, $2) ; }
2054 | typed_declspecs absdcl
2055 { $$ = build_tree_list ($1, $2); }
2056 | declmods notype_declarator
2057 { $$ = build_tree_list ($1, $2) ; }
2059 { $$ = build_tree_list ($1, $2); }
2062 /* This is used in a function definition
2063 where either a parmlist or an identifier list is ok.
2064 Its value is a list of ..._TYPE nodes or a list of identifiers. */
2065 parmlist_or_identifiers:
2067 clear_parm_order ();
2068 declare_parm_level (1); }
2069 parmlist_or_identifiers_1
2071 parmlist_tags_warning ();
2072 poplevel (0, 0, 0); }
2075 parmlist_or_identifiers_1:
2079 for (t = $1; t; t = TREE_CHAIN (t))
2080 if (TREE_VALUE (t) == NULL_TREE)
2081 error ("`...' in old-style identifier list");
2082 $$ = tree_cons (NULL_TREE, NULL_TREE, $1); }
2085 /* A nonempty list of identifiers. */
2088 { $$ = build_tree_list (NULL_TREE, $1); }
2089 | identifiers ',' IDENTIFIER
2090 { $$ = chainon ($1, build_tree_list (NULL_TREE, $3)); }
2093 /* A nonempty list of identifiers, including typenames. */
2094 identifiers_or_typenames:
2096 { $$ = build_tree_list (NULL_TREE, $1); }
2097 | identifiers_or_typenames ',' identifier
2098 { $$ = chainon ($1, build_tree_list (NULL_TREE, $3)); }
2102 /* Objective-C productions. */
2112 if (objc_implementation_context)
2114 finish_class (objc_implementation_context);
2115 objc_ivar_chain = NULL_TREE;
2116 objc_implementation_context = NULL_TREE;
2119 warning ("`@end' must appear in an implementation context");
2123 /* A nonempty list of identifiers. */
2126 { $$ = build_tree_list (NULL_TREE, $1); }
2127 | identifier_list ',' identifier
2128 { $$ = chainon ($1, build_tree_list (NULL_TREE, $3)); }
2132 CLASS identifier_list ';'
2134 objc_declare_class ($2);
2138 ALIAS identifier identifier ';'
2140 objc_declare_alias ($2, $3);
2144 INTERFACE identifier protocolrefs '{'
2146 objc_interface_context = objc_ivar_context
2147 = start_class (CLASS_INTERFACE_TYPE, $2, NULL_TREE, $3);
2148 objc_public_flag = 0;
2152 continue_class (objc_interface_context);
2157 finish_class (objc_interface_context);
2158 objc_interface_context = NULL_TREE;
2161 | INTERFACE identifier protocolrefs
2163 objc_interface_context
2164 = start_class (CLASS_INTERFACE_TYPE, $2, NULL_TREE, $3);
2165 continue_class (objc_interface_context);
2170 finish_class (objc_interface_context);
2171 objc_interface_context = NULL_TREE;
2174 | INTERFACE identifier ':' identifier protocolrefs '{'
2176 objc_interface_context = objc_ivar_context
2177 = start_class (CLASS_INTERFACE_TYPE, $2, $4, $5);
2178 objc_public_flag = 0;
2182 continue_class (objc_interface_context);
2187 finish_class (objc_interface_context);
2188 objc_interface_context = NULL_TREE;
2191 | INTERFACE identifier ':' identifier protocolrefs
2193 objc_interface_context
2194 = start_class (CLASS_INTERFACE_TYPE, $2, $4, $5);
2195 continue_class (objc_interface_context);
2200 finish_class (objc_interface_context);
2201 objc_interface_context = NULL_TREE;
2204 | IMPLEMENTATION identifier '{'
2206 objc_implementation_context = objc_ivar_context
2207 = start_class (CLASS_IMPLEMENTATION_TYPE, $2, NULL_TREE, NULL_TREE);
2208 objc_public_flag = 0;
2213 = continue_class (objc_implementation_context);
2216 | IMPLEMENTATION identifier
2218 objc_implementation_context
2219 = start_class (CLASS_IMPLEMENTATION_TYPE, $2, NULL_TREE, NULL_TREE);
2221 = continue_class (objc_implementation_context);
2224 | IMPLEMENTATION identifier ':' identifier '{'
2226 objc_implementation_context = objc_ivar_context
2227 = start_class (CLASS_IMPLEMENTATION_TYPE, $2, $4, NULL_TREE);
2228 objc_public_flag = 0;
2233 = continue_class (objc_implementation_context);
2236 | IMPLEMENTATION identifier ':' identifier
2238 objc_implementation_context
2239 = start_class (CLASS_IMPLEMENTATION_TYPE, $2, $4, NULL_TREE);
2241 = continue_class (objc_implementation_context);
2244 | INTERFACE identifier '(' identifier ')' protocolrefs
2246 objc_interface_context
2247 = start_class (CATEGORY_INTERFACE_TYPE, $2, $4, $6);
2248 continue_class (objc_interface_context);
2253 finish_class (objc_interface_context);
2254 objc_interface_context = NULL_TREE;
2257 | IMPLEMENTATION identifier '(' identifier ')'
2259 objc_implementation_context
2260 = start_class (CATEGORY_IMPLEMENTATION_TYPE, $2, $4, NULL_TREE);
2262 = continue_class (objc_implementation_context);
2267 PROTOCOL identifier protocolrefs
2269 remember_protocol_qualifiers ();
2270 objc_interface_context
2271 = start_protocol(PROTOCOL_INTERFACE_TYPE, $2, $3);
2275 forget_protocol_qualifiers();
2276 finish_protocol(objc_interface_context);
2277 objc_interface_context = NULL_TREE;
2286 | ARITHCOMPARE identifier_list ARITHCOMPARE
2288 if ($1 == LT_EXPR && $3 == GT_EXPR)
2296 ivar_decl_list visibility_spec ivar_decls
2301 PRIVATE { objc_public_flag = 2; }
2302 | PROTECTED { objc_public_flag = 0; }
2303 | PUBLIC { objc_public_flag = 1; }
2311 | ivar_decls ivar_decl ';'
2315 pedwarn ("extra semicolon in struct or union specified");
2320 /* There is a shift-reduce conflict here, because `components' may
2321 start with a `typename'. It happens that shifting (the default resolution)
2322 does the right thing, because it treats the `typename' as part of
2323 a `typed_typespecs'.
2325 It is possible that this same technique would allow the distinction
2326 between `notype_initdecls' and `initdecls' to be eliminated.
2327 But I am being cautious and not trying it. */
2330 typed_typespecs setspecs ivars
2333 resume_momentary ($2);
2335 | nonempty_type_quals setspecs ivars
2338 resume_momentary ($2);
2348 | ivars ',' ivar_declarator
2354 $$ = add_instance_variable (objc_ivar_context,
2356 $1, current_declspecs,
2359 | declarator ':' expr_no_commas
2361 $$ = add_instance_variable (objc_ivar_context,
2363 $1, current_declspecs, $3);
2365 | ':' expr_no_commas
2367 $$ = add_instance_variable (objc_ivar_context,
2370 current_declspecs, $2);
2377 remember_protocol_qualifiers ();
2378 if (objc_implementation_context)
2379 objc_inherit_code = CLASS_METHOD_DECL;
2381 fatal ("method definition not in class context");
2385 forget_protocol_qualifiers ();
2386 add_class_method (objc_implementation_context, $3);
2387 start_method_def ($3);
2388 objc_method_context = $3;
2392 continue_method_def ();
2396 finish_method_def ();
2397 objc_method_context = NULL_TREE;
2402 remember_protocol_qualifiers ();
2403 if (objc_implementation_context)
2404 objc_inherit_code = INSTANCE_METHOD_DECL;
2406 fatal ("method definition not in class context");
2410 forget_protocol_qualifiers ();
2411 add_instance_method (objc_implementation_context, $3);
2412 start_method_def ($3);
2413 objc_method_context = $3;
2417 continue_method_def ();
2421 finish_method_def ();
2422 objc_method_context = NULL_TREE;
2426 /* the reason for the strange actions in this rule
2427 is so that notype_initdecls when reached via datadef
2428 can find a valid list of type and sc specs in $0. */
2432 | {$<ttype>$ = NULL_TREE; } methodprotolist2
2435 methodprotolist2: /* eliminates a shift/reduce conflict */
2438 | methodprotolist2 methodproto
2439 | methodprotolist2 {$<ttype>$ = NULL_TREE; } datadef
2450 objc_inherit_code = CLASS_METHOD_DECL;
2454 add_class_method (objc_interface_context, $3);
2460 objc_inherit_code = INSTANCE_METHOD_DECL;
2464 add_instance_method (objc_interface_context, $3);
2470 '(' typename ')' unaryselector
2472 $$ = build_method_decl (objc_inherit_code, $2, $4, NULL_TREE);
2477 $$ = build_method_decl (objc_inherit_code, NULL_TREE, $1, NULL_TREE);
2480 | '(' typename ')' keywordselector optparmlist
2482 $$ = build_method_decl (objc_inherit_code, $2, $4, $5);
2485 | keywordselector optparmlist
2487 $$ = build_method_decl (objc_inherit_code, NULL_TREE, $1, $2);
2491 /* "optarglist" assumes that start_method_def has already been called...
2492 if it is not, the "xdecls" will not be placed in the proper scope */
2499 /* to get around the following situation: "int foo (int a) int b; {}" that
2500 is synthesized when parsing "- a:a b:b; id c; id d; { ... }" */
2515 typed_declspecs setspecs myparms ';'
2516 { resume_momentary ($2); }
2517 | typed_declspecs ';'
2518 { shadow_tag ($1); }
2520 { pedwarn ("empty declaration"); }
2525 { push_parm_decl ($1); }
2526 | myparms ',' myparm
2527 { push_parm_decl ($3); }
2530 /* A single parameter declaration or parameter type name,
2531 as found in a parmlist. DOES NOT ALLOW AN INITIALIZER OR ASMSPEC */
2535 { $$ = build_tree_list (current_declspecs, $1) ; }
2537 { $$ = build_tree_list (current_declspecs, $1) ; }
2539 { $$ = build_tree_list (current_declspecs, $1) ; }
2549 /* oh what a kludge! */
2558 /* returns a tree list node generated by get_parm_info */
2571 | keywordselector keyworddecl
2573 $$ = chainon ($1, $2);
2585 ENUM { $$ = get_identifier (token_buffer); }
2586 | STRUCT { $$ = get_identifier (token_buffer); }
2587 | UNION { $$ = get_identifier (token_buffer); }
2588 | IF { $$ = get_identifier (token_buffer); }
2589 | ELSE { $$ = get_identifier (token_buffer); }
2590 | WHILE { $$ = get_identifier (token_buffer); }
2591 | DO { $$ = get_identifier (token_buffer); }
2592 | FOR { $$ = get_identifier (token_buffer); }
2593 | SWITCH { $$ = get_identifier (token_buffer); }
2594 | CASE { $$ = get_identifier (token_buffer); }
2595 | DEFAULT { $$ = get_identifier (token_buffer); }
2596 | BREAK { $$ = get_identifier (token_buffer); }
2597 | CONTINUE { $$ = get_identifier (token_buffer); }
2598 | RETURN { $$ = get_identifier (token_buffer); }
2599 | GOTO { $$ = get_identifier (token_buffer); }
2600 | ASM_KEYWORD { $$ = get_identifier (token_buffer); }
2601 | SIZEOF { $$ = get_identifier (token_buffer); }
2602 | TYPEOF { $$ = get_identifier (token_buffer); }
2603 | ALIGNOF { $$ = get_identifier (token_buffer); }
2604 | TYPESPEC | TYPE_QUAL
2608 selector ':' '(' typename ')' identifier
2610 $$ = build_keyword_decl ($1, $4, $6);
2613 | selector ':' identifier
2615 $$ = build_keyword_decl ($1, NULL_TREE, $3);
2618 | ':' '(' typename ')' identifier
2620 $$ = build_keyword_decl (NULL_TREE, $3, $5);
2625 $$ = build_keyword_decl (NULL_TREE, NULL_TREE, $2);
2636 | keywordarglist keywordarg
2638 $$ = chainon ($1, $2);
2646 if (TREE_CHAIN ($1) == NULL_TREE)
2647 /* just return the expr., remove a level of indirection */
2648 $$ = TREE_VALUE ($1);
2650 /* we have a comma expr., we will collapse later */
2656 selector ':' keywordexpr
2658 $$ = build_tree_list ($1, $3);
2662 $$ = build_tree_list (NULL_TREE, $2);
2670 $$ = get_class_reference ($1);
2676 { objc_receiver_context = 1; }
2678 { objc_receiver_context = 0; }
2681 $$ = build_tree_list ($3, $5);
2692 | keywordnamelist keywordname
2694 $$ = chainon ($1, $2);
2701 $$ = build_tree_list ($1, NULL_TREE);
2705 $$ = build_tree_list (NULL_TREE, NULL_TREE);
2710 SELECTOR '(' selectorarg ')'
2717 PROTOCOL '(' identifier ')'
2723 /* extension to support C-structures in the archiver */
2726 ENCODE '(' typename ')'
2728 $$ = groktypename ($3);