1 /*WARNING: This file is automatically generated!*/
2 /* YACC parser for C syntax and for Objective C. -*-c-*-
3 Copyright (C) 1987, 88, 89, 92-98, 1999 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. */
46 #ifdef MULTIBYTE_CHARS
51 /* Since parsers are distinct for each language, put the language string
53 const char * const language_string = "GNU C";
55 /* Like YYERROR but do call yyerror. */
56 #define YYERROR1 { yyerror ("syntax error"); YYERROR; }
58 /* Cause the `yydebug' variable to be defined. */
64 %union {long itype; tree ttype; enum tree_code code;
65 char *filename; int lineno; int ends_in_label; }
67 /* All identifiers that are not reserved words
68 and are not declared typedefs in the current block */
71 /* All identifiers that are declared typedefs in the current block.
72 In some contexts, they are treated just like IDENTIFIER,
73 but they can also serve as typespecs in declarations. */
76 /* Reserved words that specify storage class.
77 yylval contains an IDENTIFIER_NODE which indicates which one. */
80 /* Reserved words that specify type.
81 yylval contains an IDENTIFIER_NODE which indicates which one. */
84 /* Reserved words that qualify type: "const", "volatile", or "restrict".
85 yylval contains an IDENTIFIER_NODE which indicates which one. */
88 /* Character or numeric constants.
89 yylval is the node for the constant. */
92 /* String constants in raw form.
93 yylval is a STRING_CST node. */
96 /* "...", used for functions with variable arglists. */
99 /* the reserved words */
100 /* SCO include files test "ASM", so use something else. */
101 %token SIZEOF ENUM STRUCT UNION IF ELSE WHILE DO FOR SWITCH CASE DEFAULT
102 %token BREAK CONTINUE RETURN GOTO ASM_KEYWORD TYPEOF ALIGNOF
103 %token ATTRIBUTE EXTENSION LABEL
104 %token REALPART IMAGPART VA_ARG
106 /* Used in c-lex.c for parsing pragmas. */
109 /* Add precedence rules to solve dangling else s/r conflict */
113 /* Define the operator tokens and their precedences.
114 The value is an integer because, if used, it is the tree code
115 to use in the expression made from the operator. */
117 %right <code> ASSIGN '='
118 %right <code> '?' ':'
124 %left <code> EQCOMPARE
125 %left <code> ARITHCOMPARE
126 %left <code> LSHIFT RSHIFT
128 %left <code> '*' '/' '%'
129 %right <code> UNARY PLUSPLUS MINUSMINUS
131 %left <code> POINTSAT '.' '(' '['
133 /* The Objective-C keywords. These are included in C and in
134 Objective C, so that the token codes are the same in both. */
135 %token INTERFACE IMPLEMENTATION END SELECTOR DEFS ENCODE
136 %token CLASSNAME PUBLIC PRIVATE PROTECTED PROTOCOL OBJECTNAME CLASS ALIAS
138 /* Objective-C string constants in raw form.
139 yylval is an OBJC_STRING_CST node. */
145 %type <ttype> identifier IDENTIFIER TYPENAME CONSTANT expr nonnull_exprlist exprlist
146 %type <ttype> expr_no_commas cast_expr unary_expr primary string STRING
147 %type <ttype> typed_declspecs reserved_declspecs
148 %type <ttype> typed_typespecs reserved_typespecquals
149 %type <ttype> declmods typespec typespecqual_reserved
150 %type <ttype> typed_declspecs_no_prefix_attr reserved_declspecs_no_prefix_attr
151 %type <ttype> declmods_no_prefix_attr
152 %type <ttype> SCSPEC TYPESPEC TYPE_QUAL nonempty_type_quals maybe_type_qual
153 %type <ttype> initdecls notype_initdecls initdcl notype_initdcl
154 %type <ttype> init maybeasm
155 %type <ttype> asm_operands nonnull_asm_operands asm_operand asm_clobbers
156 %type <ttype> maybe_attribute attributes attribute attribute_list attrib
157 %type <ttype> any_word
159 %type <ttype> compstmt compstmt_nostart compstmt_primary_start
161 %type <ttype> declarator
162 %type <ttype> notype_declarator after_type_declarator
163 %type <ttype> parm_declarator
165 %type <ttype> structsp component_decl_list component_decl_list2
166 %type <ttype> component_decl components component_declarator
167 %type <ttype> enumlist enumerator
168 %type <ttype> struct_head union_head enum_head
169 %type <ttype> typename absdcl absdcl1 type_quals
170 %type <ttype> xexpr parms parm identifiers
172 %type <ttype> parmlist parmlist_1 parmlist_2
173 %type <ttype> parmlist_or_identifiers parmlist_or_identifiers_1
174 %type <ttype> identifiers_or_typenames
176 %type <itype> extension
178 %type <itype> setspecs
180 %type <ends_in_label> lineno_stmt_or_label lineno_stmt_or_labels stmt_or_label
182 %type <filename> save_filename
183 %type <lineno> save_lineno
187 /* Number of statements (loosely speaking) and compound statements
189 static int stmt_count;
190 static int compstmt_count;
192 /* Input file and line number of the end of the body of last simple_if;
193 used by the stmt-rule immediately after simple_if returns. */
194 static char *if_stmt_file;
195 static int if_stmt_line;
197 /* List of types and structure classes of the current declaration. */
198 static tree current_declspecs = NULL_TREE;
199 static tree prefix_attributes = NULL_TREE;
201 /* Stack of saved values of current_declspecs and prefix_attributes. */
202 static tree declspec_stack;
204 /* 1 if we explained undeclared var errors. */
205 static int undeclared_variable_notice;
207 /* For __extension__, save/restore the warning flags which are
208 controlled by __extension__. */
209 #define SAVE_WARN_FLAGS() (pedantic | (warn_pointer_arith << 1))
210 #define RESTORE_WARN_FLAGS(val) \
212 pedantic = val & 1; \
213 warn_pointer_arith = (val >> 1) & 1; \
217 /* Tell yyparse how to print a token's value, if yydebug is set. */
219 #define YYPRINT(FILE,YYCHAR,YYLVAL) yyprint(FILE,YYCHAR,YYLVAL)
220 extern void yyprint PROTO ((FILE *, int, YYSTYPE));
222 /* Add GC roots for variables local to this file. */
226 ggc_add_tree_root (&declspec_stack, 1);
227 ggc_add_tree_root (¤t_declspecs, 1);
228 ggc_add_tree_root (&prefix_attributes, 1);
236 pedwarn ("ANSI C forbids an empty source file");
241 /* In case there were missing closebraces,
242 get us back to the global binding level. */
243 while (! global_bindings_p ())
249 /* the reason for the strange actions in this rule
250 is so that notype_initdecls when reached via datadef
251 can find a valid list of type and sc specs in $0. */
254 {$<ttype>$ = NULL_TREE; } extdef
255 | extdefs {$<ttype>$ = NULL_TREE; } extdef
261 | ASM_KEYWORD '(' expr ')' ';'
263 if ((TREE_CODE ($3) == ADDR_EXPR
264 && TREE_CODE (TREE_OPERAND ($3, 0)) == STRING_CST)
265 || TREE_CODE ($3) == STRING_CST)
268 error ("argument of `asm' is not a constant string"); }
270 { RESTORE_WARN_FLAGS ($1); }
274 setspecs notype_initdecls ';'
276 error ("ANSI C forbids data definition with no type or storage class");
277 else if (!flag_traditional)
278 warning ("data definition has no type or storage class");
280 current_declspecs = TREE_VALUE (declspec_stack);
281 prefix_attributes = TREE_PURPOSE (declspec_stack);
282 declspec_stack = TREE_CHAIN (declspec_stack);
283 resume_momentary ($1); }
284 | declmods setspecs notype_initdecls ';'
285 { current_declspecs = TREE_VALUE (declspec_stack);
286 prefix_attributes = TREE_PURPOSE (declspec_stack);
287 declspec_stack = TREE_CHAIN (declspec_stack);
288 resume_momentary ($2); }
289 | typed_declspecs setspecs initdecls ';'
290 { current_declspecs = TREE_VALUE (declspec_stack);
291 prefix_attributes = TREE_PURPOSE (declspec_stack);
292 declspec_stack = TREE_CHAIN (declspec_stack);
293 resume_momentary ($2); }
295 { pedwarn ("empty declaration"); }
296 | typed_declspecs ';'
302 pedwarn ("ANSI C does not allow extra `;' outside of a function"); }
306 typed_declspecs setspecs declarator
307 { if (! start_function (current_declspecs, $3,
308 prefix_attributes, NULL_TREE, 0))
310 reinit_parse_for_function (); }
312 { store_parm_decls (); }
314 { finish_function (0);
315 current_declspecs = TREE_VALUE (declspec_stack);
316 prefix_attributes = TREE_PURPOSE (declspec_stack);
317 declspec_stack = TREE_CHAIN (declspec_stack);
318 resume_momentary ($2); }
319 | typed_declspecs setspecs declarator error
320 { current_declspecs = TREE_VALUE (declspec_stack);
321 prefix_attributes = TREE_PURPOSE (declspec_stack);
322 declspec_stack = TREE_CHAIN (declspec_stack);
323 resume_momentary ($2); }
324 | declmods setspecs notype_declarator
325 { if (! start_function (current_declspecs, $3,
326 prefix_attributes, NULL_TREE, 0))
328 reinit_parse_for_function (); }
330 { store_parm_decls (); }
332 { finish_function (0);
333 current_declspecs = TREE_VALUE (declspec_stack);
334 prefix_attributes = TREE_PURPOSE (declspec_stack);
335 declspec_stack = TREE_CHAIN (declspec_stack);
336 resume_momentary ($2); }
337 | declmods setspecs notype_declarator error
338 { current_declspecs = TREE_VALUE (declspec_stack);
339 prefix_attributes = TREE_PURPOSE (declspec_stack);
340 declspec_stack = TREE_CHAIN (declspec_stack);
341 resume_momentary ($2); }
342 | setspecs notype_declarator
343 { if (! start_function (NULL_TREE, $2,
344 prefix_attributes, NULL_TREE, 0))
346 reinit_parse_for_function (); }
348 { store_parm_decls (); }
350 { finish_function (0);
351 current_declspecs = TREE_VALUE (declspec_stack);
352 prefix_attributes = TREE_PURPOSE (declspec_stack);
353 declspec_stack = TREE_CHAIN (declspec_stack);
354 resume_momentary ($1); }
355 | setspecs notype_declarator error
356 { current_declspecs = TREE_VALUE (declspec_stack);
357 prefix_attributes = TREE_PURPOSE (declspec_stack);
358 declspec_stack = TREE_CHAIN (declspec_stack);
359 resume_momentary ($1); }
370 { $$ = NEGATE_EXPR; }
372 { $$ = CONVERT_EXPR; }
374 { $$ = PREINCREMENT_EXPR; }
376 { $$ = PREDECREMENT_EXPR; }
378 { $$ = BIT_NOT_EXPR; }
380 { $$ = TRUTH_NOT_EXPR; }
383 expr: nonnull_exprlist
384 { $$ = build_compound_expr ($1); }
395 { $$ = build_tree_list (NULL_TREE, $1); }
396 | nonnull_exprlist ',' expr_no_commas
397 { chainon ($1, build_tree_list (NULL_TREE, $3)); }
402 | '*' cast_expr %prec UNARY
403 { $$ = build_indirect_ref ($2, "unary *"); }
404 /* __extension__ turns off -pedantic for following primary. */
405 | extension cast_expr %prec UNARY
407 RESTORE_WARN_FLAGS ($1); }
408 | unop cast_expr %prec UNARY
409 { $$ = build_unary_op ($1, $2, 0);
410 overflow_warning ($$); }
411 /* Refer to the address of a label as a pointer. */
413 { tree label = lookup_label ($2);
415 pedwarn ("ANSI C forbids `&&'");
417 $$ = null_pointer_node;
420 TREE_USED (label) = 1;
421 $$ = build1 (ADDR_EXPR, ptr_type_node, label);
422 TREE_CONSTANT ($$) = 1;
425 /* This seems to be impossible on some machines, so let's turn it off.
426 You can use __builtin_next_arg to find the anonymous stack args.
428 { tree types = TYPE_ARG_TYPES (TREE_TYPE (current_function_decl));
429 $$ = error_mark_node;
430 if (TREE_VALUE (tree_last (types)) == void_type_node)
431 error ("`&...' used in function with fixed number of arguments");
435 pedwarn ("ANSI C forbids `&...'");
436 $$ = tree_last (DECL_ARGUMENTS (current_function_decl));
437 $$ = build_unary_op (ADDR_EXPR, $$, 0);
440 | sizeof unary_expr %prec UNARY
442 if (TREE_CODE ($2) == COMPONENT_REF
443 && DECL_C_BIT_FIELD (TREE_OPERAND ($2, 1)))
444 error ("`sizeof' applied to a bit-field");
445 $$ = c_sizeof (TREE_TYPE ($2)); }
446 | sizeof '(' typename ')' %prec HYPERUNARY
448 $$ = c_sizeof (groktypename ($3)); }
449 | alignof unary_expr %prec UNARY
451 $$ = c_alignof_expr ($2); }
452 | alignof '(' typename ')' %prec HYPERUNARY
454 $$ = c_alignof (groktypename ($3)); }
455 | REALPART cast_expr %prec UNARY
456 { $$ = build_unary_op (REALPART_EXPR, $2, 0); }
457 | IMAGPART cast_expr %prec UNARY
458 { $$ = build_unary_op (IMAGPART_EXPR, $2, 0); }
459 | VA_ARG '(' expr_no_commas ',' typename ')'
460 { $$ = build_va_arg ($3, groktypename ($5)); }
464 SIZEOF { skip_evaluation++; }
468 ALIGNOF { skip_evaluation++; }
473 | '(' typename ')' cast_expr %prec UNARY
474 { tree type = groktypename ($2);
475 $$ = build_c_cast (type, $4); }
476 | '(' typename ')' '{'
477 { start_init (NULL_TREE, NULL, 0);
478 $2 = groktypename ($2);
479 really_start_incremental_init ($2); }
480 initlist_maybe_comma '}' %prec UNARY
482 tree result = pop_init_level (0);
486 if (pedantic && ! flag_isoc9x)
487 pedwarn ("ANSI C forbids constructor expressions");
488 if (TYPE_NAME (type) != 0)
490 if (TREE_CODE (TYPE_NAME (type)) == IDENTIFIER_NODE)
491 name = IDENTIFIER_POINTER (TYPE_NAME (type));
493 name = IDENTIFIER_POINTER (DECL_NAME (TYPE_NAME (type)));
498 if (TREE_CODE (type) == ARRAY_TYPE && TYPE_SIZE (type) == 0)
500 int failure = complete_array_type (type, $$, 1);
509 | expr_no_commas '+' expr_no_commas
510 { $$ = parser_build_binary_op ($2, $1, $3); }
511 | expr_no_commas '-' expr_no_commas
512 { $$ = parser_build_binary_op ($2, $1, $3); }
513 | expr_no_commas '*' expr_no_commas
514 { $$ = parser_build_binary_op ($2, $1, $3); }
515 | expr_no_commas '/' expr_no_commas
516 { $$ = parser_build_binary_op ($2, $1, $3); }
517 | expr_no_commas '%' expr_no_commas
518 { $$ = parser_build_binary_op ($2, $1, $3); }
519 | expr_no_commas LSHIFT expr_no_commas
520 { $$ = parser_build_binary_op ($2, $1, $3); }
521 | expr_no_commas RSHIFT expr_no_commas
522 { $$ = parser_build_binary_op ($2, $1, $3); }
523 | expr_no_commas ARITHCOMPARE expr_no_commas
524 { $$ = parser_build_binary_op ($2, $1, $3); }
525 | expr_no_commas EQCOMPARE expr_no_commas
526 { $$ = parser_build_binary_op ($2, $1, $3); }
527 | expr_no_commas '&' expr_no_commas
528 { $$ = parser_build_binary_op ($2, $1, $3); }
529 | expr_no_commas '|' expr_no_commas
530 { $$ = parser_build_binary_op ($2, $1, $3); }
531 | expr_no_commas '^' expr_no_commas
532 { $$ = parser_build_binary_op ($2, $1, $3); }
533 | expr_no_commas ANDAND
534 { $1 = truthvalue_conversion (default_conversion ($1));
535 skip_evaluation += $1 == boolean_false_node; }
537 { skip_evaluation -= $1 == boolean_false_node;
538 $$ = parser_build_binary_op (TRUTH_ANDIF_EXPR, $1, $4); }
539 | expr_no_commas OROR
540 { $1 = truthvalue_conversion (default_conversion ($1));
541 skip_evaluation += $1 == boolean_true_node; }
543 { skip_evaluation -= $1 == boolean_true_node;
544 $$ = parser_build_binary_op (TRUTH_ORIF_EXPR, $1, $4); }
546 { $1 = truthvalue_conversion (default_conversion ($1));
547 skip_evaluation += $1 == boolean_false_node; }
549 { skip_evaluation += (($1 == boolean_true_node)
550 - ($1 == boolean_false_node)); }
552 { skip_evaluation -= $1 == boolean_true_node;
553 $$ = build_conditional_expr ($1, $4, $7); }
556 pedwarn ("ANSI C forbids omitting the middle term of a ?: expression");
557 /* Make sure first operand is calculated only once. */
558 $<ttype>2 = save_expr ($1);
559 $1 = truthvalue_conversion (default_conversion ($<ttype>2));
560 skip_evaluation += $1 == boolean_true_node; }
562 { skip_evaluation -= $1 == boolean_true_node;
563 $$ = build_conditional_expr ($1, $<ttype>2, $5); }
564 | expr_no_commas '=' expr_no_commas
566 $$ = build_modify_expr ($1, NOP_EXPR, $3);
567 class = TREE_CODE_CLASS (TREE_CODE ($$));
568 if (class == 'e' || class == '1'
569 || class == '2' || class == '<')
570 C_SET_EXP_ORIGINAL_CODE ($$, MODIFY_EXPR);
572 | expr_no_commas ASSIGN expr_no_commas
574 $$ = build_modify_expr ($1, $2, $3);
575 /* This inhibits warnings in truthvalue_conversion. */
576 class = TREE_CODE_CLASS (TREE_CODE ($$));
577 if (class == 'e' || class == '1'
578 || class == '2' || class == '<')
579 C_SET_EXP_ORIGINAL_CODE ($$, ERROR_MARK);
587 if (!$$ || $$ == error_mark_node)
589 if (yychar == YYEMPTY)
594 /* Ordinary implicit function declaration. */
595 $$ = implicitly_declare ($1);
596 assemble_external ($$);
600 else if (current_function_decl == 0)
602 error ("`%s' undeclared here (not in a function)",
603 IDENTIFIER_POINTER ($1));
604 $$ = error_mark_node;
609 if (IDENTIFIER_GLOBAL_VALUE ($1) != error_mark_node
610 || IDENTIFIER_ERROR_LOCUS ($1) != current_function_decl)
612 error ("`%s' undeclared (first use in this function)",
613 IDENTIFIER_POINTER ($1));
615 if (! undeclared_variable_notice)
617 error ("(Each undeclared identifier is reported only once");
618 error ("for each function it appears in.)");
619 undeclared_variable_notice = 1;
622 $$ = error_mark_node;
623 /* Prevent repeated error messages. */
624 IDENTIFIER_GLOBAL_VALUE ($1) = error_mark_node;
625 IDENTIFIER_ERROR_LOCUS ($1) = current_function_decl;
629 else if (TREE_TYPE ($$) == error_mark_node)
630 $$ = error_mark_node;
631 else if (C_DECL_ANTICIPATED ($$))
633 /* The first time we see a build-in function used,
634 if it has not been declared. */
635 C_DECL_ANTICIPATED ($$) = 0;
636 if (yychar == YYEMPTY)
640 /* Omit the implicit declaration we
641 would ordinarily do, so we don't lose
642 the actual built in type.
643 But print a diagnostic for the mismatch. */
644 if (TREE_CODE ($$) != FUNCTION_DECL)
645 error ("`%s' implicitly declared as function",
646 IDENTIFIER_POINTER (DECL_NAME ($$)));
647 else if ((TYPE_MODE (TREE_TYPE (TREE_TYPE ($$)))
648 != TYPE_MODE (integer_type_node))
649 && (TREE_TYPE (TREE_TYPE ($$))
651 pedwarn ("type mismatch in implicit declaration for built-in function `%s'",
652 IDENTIFIER_POINTER (DECL_NAME ($$)));
653 /* If it really returns void, change that to int. */
654 if (TREE_TYPE (TREE_TYPE ($$)) == void_type_node)
656 = build_function_type (integer_type_node,
657 TYPE_ARG_TYPES (TREE_TYPE ($$)));
660 pedwarn ("built-in function `%s' used without declaration",
661 IDENTIFIER_POINTER (DECL_NAME ($$)));
663 /* Do what we would ordinarily do when a fn is used. */
664 assemble_external ($$);
669 assemble_external ($$);
673 if (TREE_CODE ($$) == CONST_DECL)
675 $$ = DECL_INITIAL ($$);
676 /* This is to prevent an enum whose value is 0
677 from being considered a null pointer constant. */
678 $$ = build1 (NOP_EXPR, TREE_TYPE ($$), $$);
679 TREE_CONSTANT ($$) = 1;
684 { $$ = combine_strings ($1); }
686 { char class = TREE_CODE_CLASS (TREE_CODE ($2));
687 if (class == 'e' || class == '1'
688 || class == '2' || class == '<')
689 C_SET_EXP_ORIGINAL_CODE ($2, ERROR_MARK);
692 { $$ = error_mark_node; }
693 | compstmt_primary_start compstmt_nostart ')'
696 pedwarn ("ANSI C forbids braced-groups within expressions");
697 pop_iterator_stack ();
699 rtl_exp = expand_end_stmt_expr ($1);
700 /* The statements have side effects, so the group does. */
701 TREE_SIDE_EFFECTS (rtl_exp) = 1;
703 if (TREE_CODE ($2) == BLOCK)
705 /* Make a BIND_EXPR for the BLOCK already made. */
706 $$ = build (BIND_EXPR, TREE_TYPE (rtl_exp),
707 NULL_TREE, rtl_exp, $2);
708 /* Remove the block from the tree at this point.
709 It gets put back at the proper place
710 when the BIND_EXPR is expanded. */
716 | compstmt_primary_start error ')'
718 /* Make sure we call expand_end_stmt_expr. Otherwise
719 we are likely to lose sequences and crash later. */
720 pop_iterator_stack ();
722 expand_end_stmt_expr ($1);
723 $$ = error_mark_node;
725 | primary '(' exprlist ')' %prec '.'
726 { $$ = build_function_call ($1, $3); }
727 | primary '[' expr ']' %prec '.'
728 { $$ = build_array_ref ($1, $3); }
729 | primary '.' identifier
731 $$ = build_component_ref ($1, $3);
733 | primary POINTSAT identifier
735 tree expr = build_indirect_ref ($1, "->");
737 $$ = build_component_ref (expr, $3);
740 { $$ = build_unary_op (POSTINCREMENT_EXPR, $1, 0); }
742 { $$ = build_unary_op (POSTDECREMENT_EXPR, $1, 0); }
745 /* Produces a STRING_CST with perhaps more STRING_CSTs chained onto it. */
749 { $$ = chainon ($1, $2);
750 if (warn_traditional)
751 warning ("Use of ANSI string concatenation");
756 old_style_parm_decls:
760 /* ... is used here to indicate a varargs function. */
763 pedwarn ("ANSI C does not permit use of `varargs.h'"); }
766 /* The following are analogous to lineno_decl, decls and decl
767 except that they do not allow nested functions.
768 They are used for old-style parm decls. */
770 save_filename save_lineno datadecl
777 | datadecls lineno_datadecl
778 | lineno_datadecl errstmt
781 /* We don't allow prefix attributes here because they cause reduce/reduce
782 conflicts: we can't know whether we're parsing a function decl with
783 attribute suffix, or function defn with attribute prefix on first old
786 typed_declspecs_no_prefix_attr setspecs initdecls ';'
787 { current_declspecs = TREE_VALUE (declspec_stack);
788 prefix_attributes = TREE_PURPOSE (declspec_stack);
789 declspec_stack = TREE_CHAIN (declspec_stack);
790 resume_momentary ($2); }
791 | declmods_no_prefix_attr setspecs notype_initdecls ';'
792 { current_declspecs = TREE_VALUE (declspec_stack);
793 prefix_attributes = TREE_PURPOSE (declspec_stack);
794 declspec_stack = TREE_CHAIN (declspec_stack);
795 resume_momentary ($2); }
796 | typed_declspecs_no_prefix_attr ';'
797 { shadow_tag_warned ($1, 1);
798 pedwarn ("empty declaration"); }
799 | declmods_no_prefix_attr ';'
800 { pedwarn ("empty declaration"); }
803 /* This combination which saves a lineno before a decl
804 is the normal thing to use, rather than decl itself.
805 This is to avoid shift/reduce conflicts in contexts
806 where statement labels are allowed. */
808 save_filename save_lineno decl
816 | lineno_decl errstmt
819 /* records the type and storage class specs to use for processing
820 the declarators that follow.
821 Maintains a stack of outer-level values of current_declspecs,
822 for the sake of parm declarations nested in function declarators. */
823 setspecs: /* empty */
824 { $$ = suspend_momentary ();
825 pending_xref_error ();
826 declspec_stack = tree_cons (prefix_attributes,
829 split_specs_attrs ($<ttype>0,
830 ¤t_declspecs, &prefix_attributes); }
833 /* ??? Yuck. See after_type_declarator. */
834 setattrs: /* empty */
835 { prefix_attributes = chainon (prefix_attributes, $<ttype>0); }
839 typed_declspecs setspecs initdecls ';'
840 { current_declspecs = TREE_VALUE (declspec_stack);
841 prefix_attributes = TREE_PURPOSE (declspec_stack);
842 declspec_stack = TREE_CHAIN (declspec_stack);
843 resume_momentary ($2); }
844 | declmods setspecs notype_initdecls ';'
845 { current_declspecs = TREE_VALUE (declspec_stack);
846 prefix_attributes = TREE_PURPOSE (declspec_stack);
847 declspec_stack = TREE_CHAIN (declspec_stack);
848 resume_momentary ($2); }
849 | typed_declspecs setspecs nested_function
850 { current_declspecs = TREE_VALUE (declspec_stack);
851 prefix_attributes = TREE_PURPOSE (declspec_stack);
852 declspec_stack = TREE_CHAIN (declspec_stack);
853 resume_momentary ($2); }
854 | declmods setspecs notype_nested_function
855 { current_declspecs = TREE_VALUE (declspec_stack);
856 prefix_attributes = TREE_PURPOSE (declspec_stack);
857 declspec_stack = TREE_CHAIN (declspec_stack);
858 resume_momentary ($2); }
859 | typed_declspecs ';'
862 { pedwarn ("empty declaration"); }
864 { RESTORE_WARN_FLAGS ($1); }
867 /* Declspecs which contain at least one type specifier or typedef name.
868 (Just `const' or `volatile' is not enough.)
869 A typedef'd name following these is taken as a name to be declared.
870 Declspecs have a non-NULL TREE_VALUE, attributes do not. */
873 typespec reserved_declspecs
874 { $$ = tree_cons (NULL_TREE, $1, $2); }
875 | declmods typespec reserved_declspecs
876 { $$ = chainon ($3, tree_cons (NULL_TREE, $2, $1)); }
879 reserved_declspecs: /* empty */
881 | reserved_declspecs typespecqual_reserved
882 { $$ = tree_cons (NULL_TREE, $2, $1); }
883 | reserved_declspecs SCSPEC
884 { if (extra_warnings)
885 warning ("`%s' is not at beginning of declaration",
886 IDENTIFIER_POINTER ($2));
887 $$ = tree_cons (NULL_TREE, $2, $1); }
888 | reserved_declspecs attributes
889 { $$ = tree_cons ($2, NULL_TREE, $1); }
892 typed_declspecs_no_prefix_attr:
893 typespec reserved_declspecs_no_prefix_attr
894 { $$ = tree_cons (NULL_TREE, $1, $2); }
895 | declmods_no_prefix_attr typespec reserved_declspecs_no_prefix_attr
896 { $$ = chainon ($3, tree_cons (NULL_TREE, $2, $1)); }
899 reserved_declspecs_no_prefix_attr:
902 | reserved_declspecs_no_prefix_attr typespecqual_reserved
903 { $$ = tree_cons (NULL_TREE, $2, $1); }
904 | reserved_declspecs_no_prefix_attr SCSPEC
905 { if (extra_warnings)
906 warning ("`%s' is not at beginning of declaration",
907 IDENTIFIER_POINTER ($2));
908 $$ = tree_cons (NULL_TREE, $2, $1); }
911 /* List of just storage classes, type modifiers, and prefix attributes.
912 A declaration can start with just this, but then it cannot be used
913 to redeclare a typedef-name.
914 Declspecs have a non-NULL TREE_VALUE, attributes do not. */
917 declmods_no_prefix_attr
920 { $$ = tree_cons ($1, NULL_TREE, NULL_TREE); }
921 | declmods declmods_no_prefix_attr
922 { $$ = chainon ($2, $1); }
923 | declmods attributes
924 { $$ = tree_cons ($2, NULL_TREE, $1); }
927 declmods_no_prefix_attr:
929 { $$ = tree_cons (NULL_TREE, $1, NULL_TREE);
930 TREE_STATIC ($$) = 1; }
932 { $$ = tree_cons (NULL_TREE, $1, NULL_TREE); }
933 | declmods_no_prefix_attr TYPE_QUAL
934 { $$ = tree_cons (NULL_TREE, $2, $1);
935 TREE_STATIC ($$) = 1; }
936 | declmods_no_prefix_attr SCSPEC
937 { if (extra_warnings && TREE_STATIC ($1))
938 warning ("`%s' is not at beginning of declaration",
939 IDENTIFIER_POINTER ($2));
940 $$ = tree_cons (NULL_TREE, $2, $1);
941 TREE_STATIC ($$) = TREE_STATIC ($1); }
945 /* Used instead of declspecs where storage classes are not allowed
946 (that is, for typenames and structure components).
947 Don't accept a typedef-name if anything but a modifier precedes it. */
950 typespec reserved_typespecquals
951 { $$ = tree_cons (NULL_TREE, $1, $2); }
952 | nonempty_type_quals typespec reserved_typespecquals
953 { $$ = chainon ($3, tree_cons (NULL_TREE, $2, $1)); }
956 reserved_typespecquals: /* empty */
958 | reserved_typespecquals typespecqual_reserved
959 { $$ = tree_cons (NULL_TREE, $2, $1); }
962 /* A typespec (but not a type qualifier).
963 Once we have seen one of these in a declaration,
964 if a typedef name appears then it is being redeclared. */
969 { /* For a typedef name, record the meaning, not the name.
970 In case of `foo foo, bar;'. */
971 $$ = lookup_name ($1); }
972 | TYPEOF '(' expr ')'
973 { $$ = TREE_TYPE ($3); }
974 | TYPEOF '(' typename ')'
975 { $$ = groktypename ($3); }
978 /* A typespec that is a reserved word, or a type qualifier. */
980 typespecqual_reserved: TYPESPEC
987 | initdecls ',' initdcl
992 | notype_initdecls ',' initdcl
998 | ASM_KEYWORD '(' string ')'
999 { if (TREE_CHAIN ($3)) $3 = combine_strings ($3);
1005 declarator maybeasm maybe_attribute '='
1006 { $<ttype>$ = start_decl ($1, current_declspecs, 1,
1007 $3, prefix_attributes);
1008 start_init ($<ttype>$, $2, global_bindings_p ()); }
1010 /* Note how the declaration of the variable is in effect while its init is parsed! */
1012 finish_decl ($<ttype>5, $6, $2); }
1013 | declarator maybeasm maybe_attribute
1014 { tree d = start_decl ($1, current_declspecs, 0,
1015 $3, prefix_attributes);
1016 finish_decl (d, NULL_TREE, $2);
1021 notype_declarator maybeasm maybe_attribute '='
1022 { $<ttype>$ = start_decl ($1, current_declspecs, 1,
1023 $3, prefix_attributes);
1024 start_init ($<ttype>$, $2, global_bindings_p ()); }
1026 /* Note how the declaration of the variable is in effect while its init is parsed! */
1028 decl_attributes ($<ttype>5, $3, prefix_attributes);
1029 finish_decl ($<ttype>5, $6, $2); }
1030 | notype_declarator maybeasm maybe_attribute
1031 { tree d = start_decl ($1, current_declspecs, 0,
1032 $3, prefix_attributes);
1033 finish_decl (d, NULL_TREE, $2); }
1035 /* the * rules are dummies to accept the Apollo extended syntax
1036 so that the header files compile. */
1047 | attributes attribute
1048 { $$ = chainon ($1, $2); }
1052 ATTRIBUTE '(' '(' attribute_list ')' ')'
1059 | attribute_list ',' attrib
1060 { $$ = chainon ($1, $3); }
1067 { $$ = build_tree_list ($1, NULL_TREE); }
1068 | any_word '(' IDENTIFIER ')'
1069 { $$ = build_tree_list ($1, build_tree_list (NULL_TREE, $3)); }
1070 | any_word '(' IDENTIFIER ',' nonnull_exprlist ')'
1071 { $$ = build_tree_list ($1, tree_cons (NULL_TREE, $3, $5)); }
1072 | any_word '(' exprlist ')'
1073 { $$ = build_tree_list ($1, $3); }
1076 /* This still leaves out most reserved keywords,
1077 shouldn't we include them? */
1086 /* Initializers. `init' is the entry point. */
1091 { really_start_incremental_init (NULL_TREE);
1092 /* Note that the call to clear_momentary
1093 is in process_init_element. */
1094 push_momentary (); }
1095 initlist_maybe_comma '}'
1096 { $$ = pop_init_level (0);
1097 if ($$ == error_mark_node
1098 && ! (yychar == STRING || yychar == CONSTANT))
1101 pop_momentary_nofree (); }
1104 { $$ = error_mark_node; }
1107 /* `initlist_maybe_comma' is the guts of an initializer in braces. */
1108 initlist_maybe_comma:
1111 pedwarn ("ANSI C forbids empty initializer braces"); }
1112 | initlist1 maybecomma
1117 | initlist1 ',' initelt
1120 /* `initelt' is a single element of an initializer.
1121 It may use braces. */
1123 designator_list '=' initval
1124 | designator initval
1126 { set_init_label ($1); }
1133 { push_init_level (0); }
1134 initlist_maybe_comma '}'
1135 { process_init_element (pop_init_level (0)); }
1137 { process_init_element ($1); }
1143 | designator_list designator
1148 { set_init_label ($2); }
1149 /* These are for labeled elements. The syntax for an array element
1150 initializer conflicts with the syntax for an Objective-C message,
1151 so don't include these productions in the Objective-C grammar. */
1152 | '[' expr_no_commas ELLIPSIS expr_no_commas ']'
1153 { set_init_index ($2, $4); }
1154 | '[' expr_no_commas ']'
1155 { set_init_index ($2, NULL_TREE); }
1161 pedwarn ("ANSI C forbids nested functions");
1163 push_function_context ();
1164 if (! start_function (current_declspecs, $1,
1165 prefix_attributes, NULL_TREE, 1))
1167 pop_function_context ();
1170 reinit_parse_for_function (); }
1171 old_style_parm_decls
1172 { store_parm_decls (); }
1173 /* This used to use compstmt_or_error.
1174 That caused a bug with input `f(g) int g {}',
1175 where the use of YYERROR1 above caused an error
1176 which then was handled by compstmt_or_error.
1177 There followed a repeated execution of that same rule,
1178 which called YYERROR1 again, and so on. */
1180 { finish_function (1);
1181 pop_function_context (); }
1184 notype_nested_function:
1187 pedwarn ("ANSI C forbids nested functions");
1189 push_function_context ();
1190 if (! start_function (current_declspecs, $1,
1191 prefix_attributes, NULL_TREE, 1))
1193 pop_function_context ();
1196 reinit_parse_for_function (); }
1197 old_style_parm_decls
1198 { store_parm_decls (); }
1199 /* This used to use compstmt_or_error.
1200 That caused a bug with input `f(g) int g {}',
1201 where the use of YYERROR1 above caused an error
1202 which then was handled by compstmt_or_error.
1203 There followed a repeated execution of that same rule,
1204 which called YYERROR1 again, and so on. */
1206 { finish_function (1);
1207 pop_function_context (); }
1210 /* Any kind of declarator (thus, all declarators allowed
1211 after an explicit typespec). */
1214 after_type_declarator
1218 /* A declarator that is allowed only after an explicit typespec. */
1220 after_type_declarator:
1221 '(' after_type_declarator ')'
1223 | after_type_declarator '(' parmlist_or_identifiers %prec '.'
1224 { $$ = build_nt (CALL_EXPR, $1, $3, NULL_TREE); }
1225 /* | after_type_declarator '(' error ')' %prec '.'
1226 { $$ = build_nt (CALL_EXPR, $1, NULL_TREE, NULL_TREE);
1227 poplevel (0, 0, 0); } */
1228 | after_type_declarator '[' expr ']' %prec '.'
1229 { $$ = build_nt (ARRAY_REF, $1, $3); }
1230 | after_type_declarator '[' ']' %prec '.'
1231 { $$ = build_nt (ARRAY_REF, $1, NULL_TREE); }
1232 | '*' type_quals after_type_declarator %prec UNARY
1233 { $$ = make_pointer_declarator ($2, $3); }
1234 /* ??? Yuck. setattrs is a quick hack. We can't use
1235 prefix_attributes because $1 only applies to this
1236 declarator. We assume setspecs has already been done.
1237 setattrs also avoids 5 reduce/reduce conflicts (otherwise multiple
1238 attributes could be recognized here or in `attributes'). */
1239 | attributes setattrs after_type_declarator
1244 /* Kinds of declarator that can appear in a parameter list
1245 in addition to notype_declarator. This is like after_type_declarator
1246 but does not allow a typedef name in parentheses as an identifier
1247 (because it would conflict with a function with that typedef as arg). */
1250 parm_declarator '(' parmlist_or_identifiers %prec '.'
1251 { $$ = build_nt (CALL_EXPR, $1, $3, NULL_TREE); }
1252 /* | parm_declarator '(' error ')' %prec '.'
1253 { $$ = build_nt (CALL_EXPR, $1, NULL_TREE, NULL_TREE);
1254 poplevel (0, 0, 0); } */
1255 | parm_declarator '[' '*' ']' %prec '.'
1256 { $$ = build_nt (ARRAY_REF, $1, NULL_TREE);
1258 error ("`[*]' in parameter declaration only allowed in ISO C 9x");
1260 | parm_declarator '[' expr ']' %prec '.'
1261 { $$ = build_nt (ARRAY_REF, $1, $3); }
1262 | parm_declarator '[' ']' %prec '.'
1263 { $$ = build_nt (ARRAY_REF, $1, NULL_TREE); }
1264 | '*' type_quals parm_declarator %prec UNARY
1265 { $$ = make_pointer_declarator ($2, $3); }
1266 /* ??? Yuck. setattrs is a quick hack. We can't use
1267 prefix_attributes because $1 only applies to this
1268 declarator. We assume setspecs has already been done.
1269 setattrs also avoids 5 reduce/reduce conflicts (otherwise multiple
1270 attributes could be recognized here or in `attributes'). */
1271 | attributes setattrs parm_declarator
1276 /* A declarator allowed whether or not there has been
1277 an explicit typespec. These cannot redeclare a typedef-name. */
1280 notype_declarator '(' parmlist_or_identifiers %prec '.'
1281 { $$ = build_nt (CALL_EXPR, $1, $3, NULL_TREE); }
1282 /* | notype_declarator '(' error ')' %prec '.'
1283 { $$ = build_nt (CALL_EXPR, $1, NULL_TREE, NULL_TREE);
1284 poplevel (0, 0, 0); } */
1285 | '(' notype_declarator ')'
1287 | '*' type_quals notype_declarator %prec UNARY
1288 { $$ = make_pointer_declarator ($2, $3); }
1289 | notype_declarator '[' '*' ']' %prec '.'
1290 { $$ = build_nt (ARRAY_REF, $1, NULL_TREE);
1292 error ("`[*]' in parameter declaration only allowed in ISO C 9x");
1294 | notype_declarator '[' expr ']' %prec '.'
1295 { $$ = build_nt (ARRAY_REF, $1, $3); }
1296 | notype_declarator '[' ']' %prec '.'
1297 { $$ = build_nt (ARRAY_REF, $1, NULL_TREE); }
1298 /* ??? Yuck. setattrs is a quick hack. We can't use
1299 prefix_attributes because $1 only applies to this
1300 declarator. We assume setspecs has already been done.
1301 setattrs also avoids 5 reduce/reduce conflicts (otherwise multiple
1302 attributes could be recognized here or in `attributes'). */
1303 | attributes setattrs notype_declarator
1330 struct_head identifier '{'
1331 { $$ = start_struct (RECORD_TYPE, $2);
1332 /* Start scope of tag before parsing components. */
1334 component_decl_list '}' maybe_attribute
1335 { $$ = finish_struct ($<ttype>4, $5, chainon ($1, $7)); }
1336 | struct_head '{' component_decl_list '}' maybe_attribute
1337 { $$ = finish_struct (start_struct (RECORD_TYPE, NULL_TREE),
1338 $3, chainon ($1, $5));
1340 | struct_head identifier
1341 { $$ = xref_tag (RECORD_TYPE, $2); }
1342 | union_head identifier '{'
1343 { $$ = start_struct (UNION_TYPE, $2); }
1344 component_decl_list '}' maybe_attribute
1345 { $$ = finish_struct ($<ttype>4, $5, chainon ($1, $7)); }
1346 | union_head '{' component_decl_list '}' maybe_attribute
1347 { $$ = finish_struct (start_struct (UNION_TYPE, NULL_TREE),
1348 $3, chainon ($1, $5));
1350 | union_head identifier
1351 { $$ = xref_tag (UNION_TYPE, $2); }
1352 | enum_head identifier '{'
1353 { $<itype>3 = suspend_momentary ();
1354 $$ = start_enum ($2); }
1355 enumlist maybecomma_warn '}' maybe_attribute
1356 { $$= finish_enum ($<ttype>4, nreverse ($5), chainon ($1, $8));
1357 resume_momentary ($<itype>3); }
1359 { $<itype>2 = suspend_momentary ();
1360 $$ = start_enum (NULL_TREE); }
1361 enumlist maybecomma_warn '}' maybe_attribute
1362 { $$= finish_enum ($<ttype>3, nreverse ($4), chainon ($1, $7));
1363 resume_momentary ($<itype>2); }
1364 | enum_head identifier
1365 { $$ = xref_tag (ENUMERAL_TYPE, $2); }
1376 { if (pedantic && ! flag_isoc9x)
1377 pedwarn ("comma at end of enumerator list"); }
1380 component_decl_list:
1381 component_decl_list2
1383 | component_decl_list2 component_decl
1384 { $$ = chainon ($1, $2);
1385 pedwarn ("no semicolon at end of struct or union"); }
1388 component_decl_list2: /* empty */
1390 | component_decl_list2 component_decl ';'
1391 { $$ = chainon ($1, $2); }
1392 | component_decl_list2 ';'
1394 pedwarn ("extra semicolon in struct or union specified"); }
1397 /* There is a shift-reduce conflict here, because `components' may
1398 start with a `typename'. It happens that shifting (the default resolution)
1399 does the right thing, because it treats the `typename' as part of
1400 a `typed_typespecs'.
1402 It is possible that this same technique would allow the distinction
1403 between `notype_initdecls' and `initdecls' to be eliminated.
1404 But I am being cautious and not trying it. */
1407 typed_typespecs setspecs components
1409 current_declspecs = TREE_VALUE (declspec_stack);
1410 prefix_attributes = TREE_PURPOSE (declspec_stack);
1411 declspec_stack = TREE_CHAIN (declspec_stack);
1412 resume_momentary ($2); }
1413 | typed_typespecs setspecs save_filename save_lineno maybe_attribute
1415 /* Support for unnamed structs or unions as members of
1416 structs or unions (which is [a] useful and [b] supports
1419 pedwarn ("ANSI C doesn't support unnamed structs/unions");
1421 $$ = grokfield($3, $4, NULL, current_declspecs, NULL_TREE);
1422 current_declspecs = TREE_VALUE (declspec_stack);
1423 prefix_attributes = TREE_PURPOSE (declspec_stack);
1424 declspec_stack = TREE_CHAIN (declspec_stack);
1425 resume_momentary ($2);
1427 | nonempty_type_quals setspecs components
1429 current_declspecs = TREE_VALUE (declspec_stack);
1430 prefix_attributes = TREE_PURPOSE (declspec_stack);
1431 declspec_stack = TREE_CHAIN (declspec_stack);
1432 resume_momentary ($2); }
1433 | nonempty_type_quals
1435 pedwarn ("ANSI C forbids member declarations with no members");
1440 | extension component_decl
1442 RESTORE_WARN_FLAGS ($1); }
1446 component_declarator
1447 | components ',' component_declarator
1448 { $$ = chainon ($1, $3); }
1451 component_declarator:
1452 save_filename save_lineno declarator maybe_attribute
1453 { $$ = grokfield ($1, $2, $3, current_declspecs, NULL_TREE);
1454 decl_attributes ($$, $4, prefix_attributes); }
1455 | save_filename save_lineno
1456 declarator ':' expr_no_commas maybe_attribute
1457 { $$ = grokfield ($1, $2, $3, current_declspecs, $5);
1458 decl_attributes ($$, $6, prefix_attributes); }
1459 | save_filename save_lineno ':' expr_no_commas maybe_attribute
1460 { $$ = grokfield ($1, $2, NULL_TREE, current_declspecs, $4);
1461 decl_attributes ($$, $5, prefix_attributes); }
1464 /* We chain the enumerators in reverse order.
1465 They are put in forward order where enumlist is used.
1466 (The order used to be significant, but no longer is so.
1467 However, we still maintain the order, just to be clean.) */
1471 | enumlist ',' enumerator
1472 { if ($1 == error_mark_node)
1475 $$ = chainon ($3, $1); }
1477 { $$ = error_mark_node; }
1483 { $$ = build_enumerator ($1, NULL_TREE); }
1484 | identifier '=' expr_no_commas
1485 { $$ = build_enumerator ($1, $3); }
1489 typed_typespecs absdcl
1490 { $$ = build_tree_list ($1, $2); }
1491 | nonempty_type_quals absdcl
1492 { $$ = build_tree_list ($1, $2); }
1495 absdcl: /* an absolute declarator */
1501 nonempty_type_quals:
1503 { $$ = tree_cons (NULL_TREE, $1, NULL_TREE); }
1504 | nonempty_type_quals TYPE_QUAL
1505 { $$ = tree_cons (NULL_TREE, $2, $1); }
1511 | type_quals TYPE_QUAL
1512 { $$ = tree_cons (NULL_TREE, $2, $1); }
1515 absdcl1: /* a nonempty absolute declarator */
1518 /* `(typedef)1' is `int'. */
1519 | '*' type_quals absdcl1 %prec UNARY
1520 { $$ = make_pointer_declarator ($2, $3); }
1521 | '*' type_quals %prec UNARY
1522 { $$ = make_pointer_declarator ($2, NULL_TREE); }
1523 | absdcl1 '(' parmlist %prec '.'
1524 { $$ = build_nt (CALL_EXPR, $1, $3, NULL_TREE); }
1525 | absdcl1 '[' expr ']' %prec '.'
1526 { $$ = build_nt (ARRAY_REF, $1, $3); }
1527 | absdcl1 '[' ']' %prec '.'
1528 { $$ = build_nt (ARRAY_REF, $1, NULL_TREE); }
1529 | '(' parmlist %prec '.'
1530 { $$ = build_nt (CALL_EXPR, NULL_TREE, $2, NULL_TREE); }
1531 | '[' expr ']' %prec '.'
1532 { $$ = build_nt (ARRAY_REF, NULL_TREE, $2); }
1534 { $$ = build_nt (ARRAY_REF, NULL_TREE, NULL_TREE); }
1535 /* ??? It appears we have to support attributes here, however
1536 using prefix_attributes is wrong. */
1537 | attributes setattrs absdcl1
1541 /* at least one statement, the first of which parses without error. */
1542 /* stmts is used only after decls, so an invalid first statement
1543 is actually regarded as an invalid decl and part of the decls. */
1546 lineno_stmt_or_labels
1549 pedwarn ("ANSI C forbids label at end of compound statement");
1553 lineno_stmt_or_labels:
1554 lineno_stmt_or_label
1555 | lineno_stmt_or_labels lineno_stmt_or_label
1557 | lineno_stmt_or_labels errstmt
1569 pushlevel: /* empty */
1570 { emit_line_note (input_filename, lineno);
1574 expand_start_bindings (0);
1578 /* Read zero or more forward-declarations for labels
1579 that nested functions can jump to. */
1584 pedwarn ("ANSI C forbids label declarations"); }
1589 | label_decls label_decl
1593 LABEL identifiers_or_typenames ';'
1595 for (link = $2; link; link = TREE_CHAIN (link))
1597 tree label = shadow_label (TREE_VALUE (link));
1598 C_DECLARED_LABEL_FLAG (label) = 1;
1599 declare_nonlocal_label (label);
1604 /* This is the body of a function definition.
1605 It causes syntax errors to ignore to the next openbrace. */
1612 compstmt_start: '{' { compstmt_count++; }
1614 compstmt_nostart: '}'
1615 { $$ = convert (void_type_node, integer_zero_node); }
1616 | pushlevel maybe_label_decls decls xstmts '}'
1617 { emit_line_note (input_filename, lineno);
1618 expand_end_bindings (getdecls (), 1, 0);
1619 $$ = poplevel (1, 1, 0);
1620 if (yychar == CONSTANT || yychar == STRING)
1621 pop_momentary_nofree ();
1624 | pushlevel maybe_label_decls error '}'
1625 { emit_line_note (input_filename, lineno);
1626 expand_end_bindings (getdecls (), kept_level_p (), 0);
1627 $$ = poplevel (kept_level_p (), 0, 0);
1628 if (yychar == CONSTANT || yychar == STRING)
1629 pop_momentary_nofree ();
1632 | pushlevel maybe_label_decls stmts '}'
1633 { emit_line_note (input_filename, lineno);
1634 expand_end_bindings (getdecls (), kept_level_p (), 0);
1635 $$ = poplevel (kept_level_p (), 0, 0);
1636 if (yychar == CONSTANT || yychar == STRING)
1637 pop_momentary_nofree ();
1642 compstmt_primary_start:
1644 { if (current_function_decl == 0)
1646 error ("braced-group within expression allowed only inside a function");
1649 /* We must force a BLOCK for this level
1650 so that, if it is not expanded later,
1651 there is a way to turn off the entire subtree of blocks
1652 that are contained in it. */
1654 push_iterator_stack ();
1655 push_label_level ();
1656 $$ = expand_start_stmt_expr ();
1660 compstmt: compstmt_start compstmt_nostart
1664 /* Value is number of statements counted as of the closeparen. */
1666 if_prefix lineno_labeled_stmt
1667 /* Make sure c_expand_end_cond is run once
1668 for each call to c_expand_start_cond.
1669 Otherwise a crash is likely. */
1675 { emit_line_note ($<filename>-1, $<lineno>0);
1676 c_expand_start_cond (truthvalue_conversion ($3), 0,
1678 $<itype>$ = stmt_count;
1679 if_stmt_file = $<filename>-1;
1680 if_stmt_line = $<lineno>0;
1681 position_after_white_space (); }
1684 /* This is a subroutine of stmt.
1685 It is used twice, once for valid DO statements
1686 and once for catching errors in parsing the end test. */
1691 emit_line_note ($<filename>-1, $<lineno>0);
1692 /* See comment in `while' alternative, above. */
1694 expand_start_loop_continue_elsewhere (1);
1695 position_after_white_space (); }
1696 lineno_labeled_stmt WHILE
1697 { expand_loop_continue_here (); }
1701 { $$ = input_filename; }
1708 lineno_labeled_stmt:
1709 save_filename save_lineno stmt
1711 /* | save_filename save_lineno error
1714 | save_filename save_lineno label lineno_labeled_stmt
1718 lineno_stmt_or_label:
1719 save_filename save_lineno stmt_or_label
1730 /* Parse a single real statement, not including any labels. */
1737 emit_line_note ($<filename>-1, $<lineno>0);
1738 /* It appears that this should not be done--that a non-lvalue array
1739 shouldn't get an error if the value isn't used.
1740 Section 3.2.2.1 says that an array lvalue gets converted to a pointer
1741 if it appears as a top-level expression,
1742 but says nothing about non-lvalue arrays. */
1744 /* Call default_conversion to get an error
1745 on referring to a register array if pedantic. */
1746 if (TREE_CODE (TREE_TYPE ($1)) == ARRAY_TYPE
1747 || TREE_CODE (TREE_TYPE ($1)) == FUNCTION_TYPE)
1748 $1 = default_conversion ($1);
1750 iterator_expand ($1);
1751 clear_momentary (); }
1753 { c_expand_start_else ();
1754 $<itype>1 = stmt_count;
1755 position_after_white_space (); }
1757 { c_expand_end_cond ();
1758 if (extra_warnings && stmt_count == $<itype>1)
1759 warning ("empty body in an else-statement"); }
1760 | simple_if %prec IF
1761 { c_expand_end_cond ();
1762 /* This warning is here instead of in simple_if, because we
1763 do not want a warning if an empty if is followed by an
1764 else statement. Increment stmt_count so we don't
1765 give a second error if this is a nested `if'. */
1766 if (extra_warnings && stmt_count++ == $<itype>1)
1767 warning_with_file_and_line (if_stmt_file, if_stmt_line,
1768 "empty body in an if-statement"); }
1769 /* Make sure c_expand_end_cond is run once
1770 for each call to c_expand_start_cond.
1771 Otherwise a crash is likely. */
1772 | simple_if ELSE error
1773 { c_expand_end_cond (); }
1776 emit_line_note ($<filename>-1, $<lineno>0);
1777 /* The emit_nop used to come before emit_line_note,
1778 but that made the nop seem like part of the preceding line.
1779 And that was confusing when the preceding line was
1780 inside of an if statement and was not really executed.
1781 I think it ought to work to put the nop after the line number.
1782 We will see. --rms, July 15, 1991. */
1785 { /* Don't start the loop till we have succeeded
1786 in parsing the end test. This is to make sure
1787 that we end every loop we start. */
1788 expand_start_loop (1);
1789 emit_line_note (input_filename, lineno);
1790 expand_exit_loop_if_false (NULL_PTR,
1791 truthvalue_conversion ($4));
1792 position_after_white_space (); }
1794 { expand_end_loop (); }
1797 { emit_line_note (input_filename, lineno);
1798 expand_exit_loop_if_false (NULL_PTR,
1799 truthvalue_conversion ($3));
1801 clear_momentary (); }
1802 /* This rule is needed to make sure we end every loop we start. */
1803 | do_stmt_start error
1804 { expand_end_loop ();
1805 clear_momentary (); }
1809 emit_line_note ($<filename>-1, $<lineno>0);
1810 /* See comment in `while' alternative, above. */
1812 if ($3) c_expand_expr_stmt ($3);
1813 /* Next step is to call expand_start_loop_continue_elsewhere,
1814 but wait till after we parse the entire for (...).
1815 Otherwise, invalid input might cause us to call that
1816 fn without calling expand_end_loop. */
1819 /* Can't emit now; wait till after expand_start_loop... */
1820 { $<lineno>7 = lineno;
1821 $<filename>$ = input_filename; }
1824 /* Start the loop. Doing this after parsing
1825 all the expressions ensures we will end the loop. */
1826 expand_start_loop_continue_elsewhere (1);
1827 /* Emit the end-test, with a line number. */
1828 emit_line_note ($<filename>8, $<lineno>7);
1830 expand_exit_loop_if_false (NULL_PTR,
1831 truthvalue_conversion ($6));
1832 /* Don't let the tree nodes for $9 be discarded by
1833 clear_momentary during the parsing of the next stmt. */
1835 $<lineno>7 = lineno;
1836 $<filename>8 = input_filename;
1837 position_after_white_space (); }
1839 { /* Emit the increment expression, with a line number. */
1840 emit_line_note ($<filename>8, $<lineno>7);
1841 expand_loop_continue_here ();
1843 c_expand_expr_stmt ($9);
1844 if (yychar == CONSTANT || yychar == STRING)
1845 pop_momentary_nofree ();
1848 expand_end_loop (); }
1849 | SWITCH '(' expr ')'
1851 emit_line_note ($<filename>-1, $<lineno>0);
1852 c_expand_start_case ($3);
1853 /* Don't let the tree nodes for $3 be discarded by
1854 clear_momentary during the parsing of the next stmt. */
1856 position_after_white_space (); }
1858 { expand_end_case ($3);
1859 if (yychar == CONSTANT || yychar == STRING)
1860 pop_momentary_nofree ();
1865 emit_line_note ($<filename>-1, $<lineno>0);
1866 if ( ! expand_exit_something ())
1867 error ("break statement not within loop or switch"); }
1870 emit_line_note ($<filename>-1, $<lineno>0);
1871 if (! expand_continue_loop (NULL_PTR))
1872 error ("continue statement not within a loop"); }
1875 emit_line_note ($<filename>-1, $<lineno>0);
1876 c_expand_return (NULL_TREE); }
1879 emit_line_note ($<filename>-1, $<lineno>0);
1880 c_expand_return ($2); }
1881 | ASM_KEYWORD maybe_type_qual '(' expr ')' ';'
1883 emit_line_note ($<filename>-1, $<lineno>0);
1885 if ((TREE_CODE ($4) == ADDR_EXPR
1886 && TREE_CODE (TREE_OPERAND ($4, 0)) == STRING_CST)
1887 || TREE_CODE ($4) == STRING_CST)
1890 error ("argument of `asm' is not a constant string"); }
1891 /* This is the case with just output operands. */
1892 | ASM_KEYWORD maybe_type_qual '(' expr ':' asm_operands ')' ';'
1894 emit_line_note ($<filename>-1, $<lineno>0);
1895 c_expand_asm_operands ($4, $6, NULL_TREE, NULL_TREE,
1896 $2 == ridpointers[(int)RID_VOLATILE],
1897 input_filename, lineno); }
1898 /* This is the case with input operands as well. */
1899 | ASM_KEYWORD maybe_type_qual '(' expr ':' asm_operands ':' asm_operands ')' ';'
1901 emit_line_note ($<filename>-1, $<lineno>0);
1902 c_expand_asm_operands ($4, $6, $8, NULL_TREE,
1903 $2 == ridpointers[(int)RID_VOLATILE],
1904 input_filename, lineno); }
1905 /* This is the case with clobbered registers as well. */
1906 | ASM_KEYWORD maybe_type_qual '(' expr ':' asm_operands ':'
1907 asm_operands ':' asm_clobbers ')' ';'
1909 emit_line_note ($<filename>-1, $<lineno>0);
1910 c_expand_asm_operands ($4, $6, $8, $10,
1911 $2 == ridpointers[(int)RID_VOLATILE],
1912 input_filename, lineno); }
1913 | GOTO identifier ';'
1916 emit_line_note ($<filename>-1, $<lineno>0);
1917 decl = lookup_label ($2);
1920 TREE_USED (decl) = 1;
1926 pedwarn ("ANSI C forbids `goto *expr;'");
1928 emit_line_note ($<filename>-1, $<lineno>0);
1929 expand_computed_goto (convert (ptr_type_node, $3)); }
1934 all_iter_stmt_simple
1935 /* | all_iter_stmt_with_decl */
1938 all_iter_stmt_simple:
1941 /* The value returned by this action is */
1942 /* 1 if everything is OK */
1943 /* 0 in case of error or already bound iterator */
1946 if (TREE_CODE ($3) != VAR_DECL)
1947 error ("invalid `for (ITERATOR)' syntax");
1948 else if (! ITERATOR_P ($3))
1949 error ("`%s' is not an iterator",
1950 IDENTIFIER_POINTER (DECL_NAME ($3)));
1951 else if (ITERATOR_BOUND_P ($3))
1952 error ("`for (%s)' inside expansion of same iterator",
1953 IDENTIFIER_POINTER (DECL_NAME ($3)));
1957 iterator_for_loop_start ($3);
1963 iterator_for_loop_end ($3);
1966 /* This really should allow any kind of declaration,
1967 for generality. Fix it before turning it back on.
1969 all_iter_stmt_with_decl:
1970 FOR '(' ITERATOR pushlevel setspecs iterator_spec ')'
1972 */ /* The value returned by this action is */
1973 /* 1 if everything is OK */
1974 /* 0 in case of error or already bound iterator */
1976 iterator_for_loop_start ($6);
1980 iterator_for_loop_end ($6);
1981 emit_line_note (input_filename, lineno);
1982 expand_end_bindings (getdecls (), 1, 0);
1983 $<ttype>$ = poplevel (1, 1, 0);
1984 if (yychar == CONSTANT || yychar == STRING)
1985 pop_momentary_nofree ();
1991 /* Any kind of label, including jump labels and case labels.
1992 ANSI C accepts labels only before statements, but we allow them
1993 also at the end of a compound statement. */
1995 label: CASE expr_no_commas ':'
1996 { register tree value = check_case_value ($2);
1998 = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE);
2002 if (value != error_mark_node)
2007 if (pedantic && ! INTEGRAL_TYPE_P (TREE_TYPE (value)))
2008 pedwarn ("label must have integral type in ANSI C");
2010 success = pushcase (value, convert_and_check,
2014 error ("case label not within a switch statement");
2015 else if (success == 2)
2017 error ("duplicate case value");
2018 error_with_decl (duplicate, "this is the first entry for that value");
2020 else if (success == 3)
2021 warning ("case value out of range");
2022 else if (success == 5)
2023 error ("case label within scope of cleanup or variable array");
2025 position_after_white_space (); }
2026 | CASE expr_no_commas ELLIPSIS expr_no_commas ':'
2027 { register tree value1 = check_case_value ($2);
2028 register tree value2 = check_case_value ($4);
2030 = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE);
2033 pedwarn ("ANSI C forbids case ranges");
2036 if (value1 != error_mark_node && value2 != error_mark_node)
2039 int success = pushcase_range (value1, value2,
2040 convert_and_check, label,
2043 error ("case label not within a switch statement");
2044 else if (success == 2)
2046 error ("duplicate case value");
2047 error_with_decl (duplicate, "this is the first entry for that value");
2049 else if (success == 3)
2050 warning ("case value out of range");
2051 else if (success == 4)
2052 warning ("empty case range");
2053 else if (success == 5)
2054 error ("case label within scope of cleanup or variable array");
2056 position_after_white_space (); }
2061 = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE);
2062 int success = pushcase (NULL_TREE, 0, label, &duplicate);
2065 error ("default label not within a switch statement");
2066 else if (success == 2)
2068 error ("multiple default labels in one switch");
2069 error_with_decl (duplicate, "this is the first default label");
2071 position_after_white_space (); }
2072 | identifier ':' maybe_attribute
2073 { tree label = define_label (input_filename, lineno, $1);
2078 expand_label (label);
2079 decl_attributes (label, $3, NULL_TREE);
2081 position_after_white_space (); }
2084 /* Either a type-qualifier or nothing. First thing in an `asm' statement. */
2088 { emit_line_note (input_filename, lineno);
2091 { emit_line_note (input_filename, lineno); }
2100 /* These are the operands other than the first string and colon
2101 in asm ("addextend %2,%1": "=dm" (x), "0" (y), "g" (*x)) */
2102 asm_operands: /* empty */
2104 | nonnull_asm_operands
2107 nonnull_asm_operands:
2109 | nonnull_asm_operands ',' asm_operand
2110 { $$ = chainon ($1, $3); }
2115 { $$ = build_tree_list ($1, $3); }
2120 { $$ = tree_cons (NULL_TREE, combine_strings ($1), NULL_TREE); }
2121 | asm_clobbers ',' string
2122 { $$ = tree_cons (NULL_TREE, combine_strings ($3), $1); }
2125 /* This is what appears inside the parens in a function declarator.
2126 Its value is a list of ..._TYPE nodes. */
2129 clear_parm_order ();
2130 declare_parm_level (0); }
2133 parmlist_tags_warning ();
2134 poplevel (0, 0, 0); }
2142 pedwarn ("ANSI C forbids forward parameter declarations");
2143 /* Mark the forward decls as such. */
2144 for (parm = getdecls (); parm; parm = TREE_CHAIN (parm))
2145 TREE_ASM_WRITTEN (parm) = 1;
2146 clear_parm_order (); }
2150 { $$ = tree_cons (NULL_TREE, NULL_TREE, NULL_TREE); }
2153 /* This is what appears inside the parens in a function declarator.
2154 Is value is represented in the format that grokdeclarator expects. */
2155 parmlist_2: /* empty */
2156 { $$ = get_parm_info (0); }
2158 { $$ = get_parm_info (0);
2159 /* Gcc used to allow this as an extension. However, it does
2160 not work for all targets, and thus has been disabled.
2161 Also, since func (...) and func () are indistinguishable,
2162 it caused problems with the code in expand_builtin which
2163 tries to verify that BUILT_IN_NEXT_ARG is being used
2165 error ("ANSI C requires a named argument before `...'");
2168 { $$ = get_parm_info (1); }
2169 | parms ',' ELLIPSIS
2170 { $$ = get_parm_info (0); }
2175 { push_parm_decl ($1); }
2177 { push_parm_decl ($3); }
2180 /* A single parameter declaration or parameter type name,
2181 as found in a parmlist. */
2183 typed_declspecs setspecs parm_declarator maybe_attribute
2184 { $$ = build_tree_list (build_tree_list (current_declspecs,
2186 build_tree_list (prefix_attributes,
2188 current_declspecs = TREE_VALUE (declspec_stack);
2189 prefix_attributes = TREE_PURPOSE (declspec_stack);
2190 declspec_stack = TREE_CHAIN (declspec_stack);
2191 resume_momentary ($2); }
2192 | typed_declspecs setspecs notype_declarator maybe_attribute
2193 { $$ = build_tree_list (build_tree_list (current_declspecs,
2195 build_tree_list (prefix_attributes,
2197 current_declspecs = TREE_VALUE (declspec_stack);
2198 prefix_attributes = TREE_PURPOSE (declspec_stack);
2199 declspec_stack = TREE_CHAIN (declspec_stack);
2200 resume_momentary ($2); }
2201 | typed_declspecs setspecs absdcl maybe_attribute
2202 { $$ = build_tree_list (build_tree_list (current_declspecs,
2204 build_tree_list (prefix_attributes,
2206 current_declspecs = TREE_VALUE (declspec_stack);
2207 prefix_attributes = TREE_PURPOSE (declspec_stack);
2208 declspec_stack = TREE_CHAIN (declspec_stack);
2209 resume_momentary ($2); }
2210 | declmods setspecs notype_declarator maybe_attribute
2211 { $$ = build_tree_list (build_tree_list (current_declspecs,
2213 build_tree_list (prefix_attributes,
2215 current_declspecs = TREE_VALUE (declspec_stack);
2216 prefix_attributes = TREE_PURPOSE (declspec_stack);
2217 declspec_stack = TREE_CHAIN (declspec_stack);
2218 resume_momentary ($2); }
2220 | declmods setspecs absdcl maybe_attribute
2221 { $$ = build_tree_list (build_tree_list (current_declspecs,
2223 build_tree_list (prefix_attributes,
2225 current_declspecs = TREE_VALUE (declspec_stack);
2226 prefix_attributes = TREE_PURPOSE (declspec_stack);
2227 declspec_stack = TREE_CHAIN (declspec_stack);
2228 resume_momentary ($2); }
2231 /* This is used in a function definition
2232 where either a parmlist or an identifier list is ok.
2233 Its value is a list of ..._TYPE nodes or a list of identifiers. */
2234 parmlist_or_identifiers:
2236 clear_parm_order ();
2237 declare_parm_level (1); }
2238 parmlist_or_identifiers_1
2240 parmlist_tags_warning ();
2241 poplevel (0, 0, 0); }
2244 parmlist_or_identifiers_1:
2248 for (t = $1; t; t = TREE_CHAIN (t))
2249 if (TREE_VALUE (t) == NULL_TREE)
2250 error ("`...' in old-style identifier list");
2251 $$ = tree_cons (NULL_TREE, NULL_TREE, $1); }
2254 /* A nonempty list of identifiers. */
2257 { $$ = build_tree_list (NULL_TREE, $1); }
2258 | identifiers ',' IDENTIFIER
2259 { $$ = chainon ($1, build_tree_list (NULL_TREE, $3)); }
2262 /* A nonempty list of identifiers, including typenames. */
2263 identifiers_or_typenames:
2265 { $$ = build_tree_list (NULL_TREE, $1); }
2266 | identifiers_or_typenames ',' identifier
2267 { $$ = chainon ($1, build_tree_list (NULL_TREE, $3)); }
2272 { $$ = SAVE_WARN_FLAGS();
2274 warn_pointer_arith = 0; }