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 { $$
= chainon
($1, $2); }
753 old_style_parm_decls:
757 /* ... is used here to indicate a varargs function. */
760 pedwarn
("ANSI C does not permit use of `varargs.h'"); }
763 /* The following are analogous to lineno_decl, decls and decl
764 except that they do not allow nested functions.
765 They are used for old-style parm decls. */
767 save_filename save_lineno datadecl
774 | datadecls lineno_datadecl
775 | lineno_datadecl errstmt
778 /* We don't allow prefix attributes here because they cause reduce/reduce
779 conflicts: we can't know whether we're parsing a function decl with
780 attribute suffix, or function defn with attribute prefix on first old
783 typed_declspecs_no_prefix_attr setspecs initdecls
';'
784 { current_declspecs
= TREE_VALUE
(declspec_stack
);
785 prefix_attributes
= TREE_PURPOSE
(declspec_stack
);
786 declspec_stack
= TREE_CHAIN
(declspec_stack
);
787 resume_momentary
($2); }
788 | declmods_no_prefix_attr setspecs notype_initdecls
';'
789 { current_declspecs
= TREE_VALUE
(declspec_stack
);
790 prefix_attributes
= TREE_PURPOSE
(declspec_stack
);
791 declspec_stack
= TREE_CHAIN
(declspec_stack
);
792 resume_momentary
($2); }
793 | typed_declspecs_no_prefix_attr
';'
794 { shadow_tag_warned
($1, 1);
795 pedwarn
("empty declaration"); }
796 | declmods_no_prefix_attr
';'
797 { pedwarn
("empty declaration"); }
800 /* This combination which saves a lineno before a decl
801 is the normal thing to use, rather than decl itself.
802 This is to avoid shift/reduce conflicts in contexts
803 where statement labels are allowed. */
805 save_filename save_lineno decl
813 | lineno_decl errstmt
816 /* records the type and storage class specs to use for processing
817 the declarators that follow.
818 Maintains a stack of outer-level values of current_declspecs,
819 for the sake of parm declarations nested in function declarators. */
820 setspecs: /* empty */
821 { $$
= suspend_momentary
();
822 pending_xref_error
();
823 declspec_stack
= tree_cons
(prefix_attributes
,
826 split_specs_attrs
($
<ttype
>0,
827 ¤t_declspecs
, &prefix_attributes
); }
830 /* ??? Yuck. See after_type_declarator. */
831 setattrs: /* empty */
832 { prefix_attributes
= chainon
(prefix_attributes
, $
<ttype
>0); }
836 typed_declspecs setspecs initdecls
';'
837 { current_declspecs
= TREE_VALUE
(declspec_stack
);
838 prefix_attributes
= TREE_PURPOSE
(declspec_stack
);
839 declspec_stack
= TREE_CHAIN
(declspec_stack
);
840 resume_momentary
($2); }
841 | declmods setspecs notype_initdecls
';'
842 { current_declspecs
= TREE_VALUE
(declspec_stack
);
843 prefix_attributes
= TREE_PURPOSE
(declspec_stack
);
844 declspec_stack
= TREE_CHAIN
(declspec_stack
);
845 resume_momentary
($2); }
846 | typed_declspecs setspecs nested_function
847 { current_declspecs
= TREE_VALUE
(declspec_stack
);
848 prefix_attributes
= TREE_PURPOSE
(declspec_stack
);
849 declspec_stack
= TREE_CHAIN
(declspec_stack
);
850 resume_momentary
($2); }
851 | declmods setspecs notype_nested_function
852 { current_declspecs
= TREE_VALUE
(declspec_stack
);
853 prefix_attributes
= TREE_PURPOSE
(declspec_stack
);
854 declspec_stack
= TREE_CHAIN
(declspec_stack
);
855 resume_momentary
($2); }
856 | typed_declspecs
';'
859 { pedwarn
("empty declaration"); }
861 { RESTORE_WARN_FLAGS
($1); }
864 /* Declspecs which contain at least one type specifier or typedef name.
865 (Just `const' or `volatile' is not enough.)
866 A typedef'd name following these is taken as a name to be declared.
867 Declspecs have a non-NULL TREE_VALUE, attributes do not. */
870 typespec reserved_declspecs
871 { $$
= tree_cons
(NULL_TREE
, $1, $2); }
872 | declmods typespec reserved_declspecs
873 { $$
= chainon
($3, tree_cons
(NULL_TREE
, $2, $1)); }
876 reserved_declspecs: /* empty */
878 | reserved_declspecs typespecqual_reserved
879 { $$
= tree_cons
(NULL_TREE
, $2, $1); }
880 | reserved_declspecs SCSPEC
881 { if
(extra_warnings
)
882 warning
("`%s' is not at beginning of declaration",
883 IDENTIFIER_POINTER
($2));
884 $$
= tree_cons
(NULL_TREE
, $2, $1); }
885 | reserved_declspecs attributes
886 { $$
= tree_cons
($2, NULL_TREE
, $1); }
889 typed_declspecs_no_prefix_attr:
890 typespec reserved_declspecs_no_prefix_attr
891 { $$
= tree_cons
(NULL_TREE
, $1, $2); }
892 | declmods_no_prefix_attr typespec reserved_declspecs_no_prefix_attr
893 { $$
= chainon
($3, tree_cons
(NULL_TREE
, $2, $1)); }
896 reserved_declspecs_no_prefix_attr:
899 | reserved_declspecs_no_prefix_attr typespecqual_reserved
900 { $$
= tree_cons
(NULL_TREE
, $2, $1); }
901 | reserved_declspecs_no_prefix_attr SCSPEC
902 { if
(extra_warnings
)
903 warning
("`%s' is not at beginning of declaration",
904 IDENTIFIER_POINTER
($2));
905 $$
= tree_cons
(NULL_TREE
, $2, $1); }
908 /* List of just storage classes, type modifiers, and prefix attributes.
909 A declaration can start with just this, but then it cannot be used
910 to redeclare a typedef-name.
911 Declspecs have a non-NULL TREE_VALUE, attributes do not. */
914 declmods_no_prefix_attr
917 { $$
= tree_cons
($1, NULL_TREE
, NULL_TREE
); }
918 | declmods declmods_no_prefix_attr
919 { $$
= chainon
($2, $1); }
920 | declmods attributes
921 { $$
= tree_cons
($2, NULL_TREE
, $1); }
924 declmods_no_prefix_attr:
926 { $$
= tree_cons
(NULL_TREE
, $1, NULL_TREE
);
927 TREE_STATIC
($$
) = 1; }
929 { $$
= tree_cons
(NULL_TREE
, $1, NULL_TREE
); }
930 | declmods_no_prefix_attr TYPE_QUAL
931 { $$
= tree_cons
(NULL_TREE
, $2, $1);
932 TREE_STATIC
($$
) = 1; }
933 | declmods_no_prefix_attr SCSPEC
934 { if
(extra_warnings
&& TREE_STATIC
($1))
935 warning
("`%s' is not at beginning of declaration",
936 IDENTIFIER_POINTER
($2));
937 $$
= tree_cons
(NULL_TREE
, $2, $1);
938 TREE_STATIC
($$
) = TREE_STATIC
($1); }
942 /* Used instead of declspecs where storage classes are not allowed
943 (that is, for typenames and structure components).
944 Don't accept a typedef-name if anything but a modifier precedes it. */
947 typespec reserved_typespecquals
948 { $$
= tree_cons
(NULL_TREE
, $1, $2); }
949 | nonempty_type_quals typespec reserved_typespecquals
950 { $$
= chainon
($3, tree_cons
(NULL_TREE
, $2, $1)); }
953 reserved_typespecquals: /* empty */
955 | reserved_typespecquals typespecqual_reserved
956 { $$
= tree_cons
(NULL_TREE
, $2, $1); }
959 /* A typespec (but not a type qualifier).
960 Once we have seen one of these in a declaration,
961 if a typedef name appears then it is being redeclared. */
966 { /* For a typedef name, record the meaning, not the name.
967 In case of `foo foo, bar;'. */
968 $$
= lookup_name
($1); }
969 | TYPEOF
'(' expr
')'
970 { $$
= TREE_TYPE
($3); }
971 | TYPEOF
'(' typename
')'
972 { $$
= groktypename
($3); }
975 /* A typespec that is a reserved word, or a type qualifier. */
977 typespecqual_reserved: TYPESPEC
984 | initdecls
',' initdcl
989 | notype_initdecls
',' initdcl
995 | ASM_KEYWORD
'(' string ')'
996 { if
(TREE_CHAIN
($3)) $3 = combine_strings
($3);
1002 declarator maybeasm maybe_attribute
'='
1003 { $
<ttype
>$
= start_decl
($1, current_declspecs
, 1,
1004 $3, prefix_attributes
);
1005 start_init
($
<ttype
>$
, $2, global_bindings_p
()); }
1007 /* Note how the declaration of the variable is in effect while its init is parsed! */
1009 finish_decl
($
<ttype
>5, $6, $2); }
1010 | declarator maybeasm maybe_attribute
1011 { tree d
= start_decl
($1, current_declspecs
, 0,
1012 $3, prefix_attributes
);
1013 finish_decl
(d
, NULL_TREE
, $2);
1018 notype_declarator maybeasm maybe_attribute
'='
1019 { $
<ttype
>$
= start_decl
($1, current_declspecs
, 1,
1020 $3, prefix_attributes
);
1021 start_init
($
<ttype
>$
, $2, global_bindings_p
()); }
1023 /* Note how the declaration of the variable is in effect while its init is parsed! */
1025 decl_attributes
($
<ttype
>5, $3, prefix_attributes
);
1026 finish_decl
($
<ttype
>5, $6, $2); }
1027 | notype_declarator maybeasm maybe_attribute
1028 { tree d
= start_decl
($1, current_declspecs
, 0,
1029 $3, prefix_attributes
);
1030 finish_decl
(d
, NULL_TREE
, $2); }
1032 /* the * rules are dummies to accept the Apollo extended syntax
1033 so that the header files compile. */
1044 | attributes attribute
1045 { $$
= chainon
($1, $2); }
1049 ATTRIBUTE
'(' '(' attribute_list
')' ')'
1056 | attribute_list
',' attrib
1057 { $$
= chainon
($1, $3); }
1064 { $$
= build_tree_list
($1, NULL_TREE
); }
1065 | any_word
'(' IDENTIFIER
')'
1066 { $$
= build_tree_list
($1, build_tree_list
(NULL_TREE
, $3)); }
1067 | any_word
'(' IDENTIFIER
',' nonnull_exprlist
')'
1068 { $$
= build_tree_list
($1, tree_cons
(NULL_TREE
, $3, $5)); }
1069 | any_word
'(' exprlist
')'
1070 { $$
= build_tree_list
($1, $3); }
1073 /* This still leaves out most reserved keywords,
1074 shouldn't we include them? */
1083 /* Initializers. `init' is the entry point. */
1088 { really_start_incremental_init
(NULL_TREE
);
1089 /* Note that the call to clear_momentary
1090 is in process_init_element. */
1091 push_momentary
(); }
1092 initlist_maybe_comma
'}'
1093 { $$
= pop_init_level
(0);
1094 if
($$
== error_mark_node
1095 && ! (yychar == STRING ||
yychar == CONSTANT
))
1098 pop_momentary_nofree
(); }
1101 { $$
= error_mark_node
; }
1104 /* `initlist_maybe_comma' is the guts of an initializer in braces. */
1105 initlist_maybe_comma:
1108 pedwarn
("ANSI C forbids empty initializer braces"); }
1109 | initlist1 maybecomma
1114 | initlist1
',' initelt
1117 /* `initelt' is a single element of an initializer.
1118 It may use braces. */
1120 designator_list
'=' initval
1121 | designator initval
1123 { set_init_label
($1); }
1130 { push_init_level
(0); }
1131 initlist_maybe_comma
'}'
1132 { process_init_element
(pop_init_level
(0)); }
1134 { process_init_element
($1); }
1140 | designator_list designator
1145 { set_init_label
($2); }
1146 /* These are for labeled elements. The syntax for an array element
1147 initializer conflicts with the syntax for an Objective-C message,
1148 so don't include these productions in the Objective-C grammar. */
1149 |
'[' expr_no_commas ELLIPSIS expr_no_commas
']'
1150 { set_init_index
($2, $4); }
1151 |
'[' expr_no_commas
']'
1152 { set_init_index
($2, NULL_TREE
); }
1158 pedwarn
("ANSI C forbids nested functions");
1160 push_function_context
();
1161 if
(! start_function
(current_declspecs
, $1,
1162 prefix_attributes
, NULL_TREE
, 1))
1164 pop_function_context
();
1167 reinit_parse_for_function
(); }
1168 old_style_parm_decls
1169 { store_parm_decls
(); }
1170 /* This used to use compstmt_or_error.
1171 That caused a bug with input `f(g) int g {}',
1172 where the use of YYERROR1 above caused an error
1173 which then was handled by compstmt_or_error.
1174 There followed a repeated execution of that same rule,
1175 which called YYERROR1 again, and so on. */
1177 { finish_function
(1);
1178 pop_function_context
(); }
1181 notype_nested_function:
1184 pedwarn
("ANSI C forbids nested functions");
1186 push_function_context
();
1187 if
(! start_function
(current_declspecs
, $1,
1188 prefix_attributes
, NULL_TREE
, 1))
1190 pop_function_context
();
1193 reinit_parse_for_function
(); }
1194 old_style_parm_decls
1195 { store_parm_decls
(); }
1196 /* This used to use compstmt_or_error.
1197 That caused a bug with input `f(g) int g {}',
1198 where the use of YYERROR1 above caused an error
1199 which then was handled by compstmt_or_error.
1200 There followed a repeated execution of that same rule,
1201 which called YYERROR1 again, and so on. */
1203 { finish_function
(1);
1204 pop_function_context
(); }
1207 /* Any kind of declarator (thus, all declarators allowed
1208 after an explicit typespec). */
1211 after_type_declarator
1215 /* A declarator that is allowed only after an explicit typespec. */
1217 after_type_declarator:
1218 '(' after_type_declarator
')'
1220 | after_type_declarator
'(' parmlist_or_identifiers %prec
'.'
1221 { $$
= build_nt
(CALL_EXPR
, $1, $3, NULL_TREE
); }
1222 /* | after_type_declarator '(' error ')' %prec '.'
1223 { $$ = build_nt (CALL_EXPR, $1, NULL_TREE, NULL_TREE);
1224 poplevel (0, 0, 0); } */
1225 | after_type_declarator
'[' expr
']' %prec
'.'
1226 { $$
= build_nt
(ARRAY_REF
, $1, $3); }
1227 | after_type_declarator
'[' ']' %prec
'.'
1228 { $$
= build_nt
(ARRAY_REF
, $1, NULL_TREE
); }
1229 |
'*' type_quals after_type_declarator %prec UNARY
1230 { $$
= make_pointer_declarator
($2, $3); }
1231 /* ??? Yuck. setattrs is a quick hack. We can't use
1232 prefix_attributes because $1 only applies to this
1233 declarator. We assume setspecs has already been done.
1234 setattrs also avoids 5 reduce/reduce conflicts (otherwise multiple
1235 attributes could be recognized here or in `attributes'). */
1236 | attributes setattrs after_type_declarator
1241 /* Kinds of declarator that can appear in a parameter list
1242 in addition to notype_declarator. This is like after_type_declarator
1243 but does not allow a typedef name in parentheses as an identifier
1244 (because it would conflict with a function with that typedef as arg). */
1247 parm_declarator
'(' parmlist_or_identifiers %prec
'.'
1248 { $$
= build_nt
(CALL_EXPR
, $1, $3, NULL_TREE
); }
1249 /* | parm_declarator '(' error ')' %prec '.'
1250 { $$ = build_nt (CALL_EXPR, $1, NULL_TREE, NULL_TREE);
1251 poplevel (0, 0, 0); } */
1252 | parm_declarator
'[' '*' ']' %prec
'.'
1253 { $$
= build_nt
(ARRAY_REF
, $1, NULL_TREE
);
1255 error ("`[*]' in parameter declaration only allowed in ISO C 9x");
1257 | parm_declarator
'[' expr
']' %prec
'.'
1258 { $$
= build_nt
(ARRAY_REF
, $1, $3); }
1259 | parm_declarator
'[' ']' %prec
'.'
1260 { $$
= build_nt
(ARRAY_REF
, $1, NULL_TREE
); }
1261 |
'*' type_quals parm_declarator %prec UNARY
1262 { $$
= make_pointer_declarator
($2, $3); }
1263 /* ??? Yuck. setattrs is a quick hack. We can't use
1264 prefix_attributes because $1 only applies to this
1265 declarator. We assume setspecs has already been done.
1266 setattrs also avoids 5 reduce/reduce conflicts (otherwise multiple
1267 attributes could be recognized here or in `attributes'). */
1268 | attributes setattrs parm_declarator
1273 /* A declarator allowed whether or not there has been
1274 an explicit typespec. These cannot redeclare a typedef-name. */
1277 notype_declarator
'(' parmlist_or_identifiers %prec
'.'
1278 { $$
= build_nt
(CALL_EXPR
, $1, $3, NULL_TREE
); }
1279 /* | notype_declarator '(' error ')' %prec '.'
1280 { $$ = build_nt (CALL_EXPR, $1, NULL_TREE, NULL_TREE);
1281 poplevel (0, 0, 0); } */
1282 |
'(' notype_declarator
')'
1284 |
'*' type_quals notype_declarator %prec UNARY
1285 { $$
= make_pointer_declarator
($2, $3); }
1286 | notype_declarator
'[' '*' ']' %prec
'.'
1287 { $$
= build_nt
(ARRAY_REF
, $1, NULL_TREE
);
1289 error ("`[*]' in parameter declaration only allowed in ISO C 9x");
1291 | notype_declarator
'[' expr
']' %prec
'.'
1292 { $$
= build_nt
(ARRAY_REF
, $1, $3); }
1293 | notype_declarator
'[' ']' %prec
'.'
1294 { $$
= build_nt
(ARRAY_REF
, $1, NULL_TREE
); }
1295 /* ??? Yuck. setattrs is a quick hack. We can't use
1296 prefix_attributes because $1 only applies to this
1297 declarator. We assume setspecs has already been done.
1298 setattrs also avoids 5 reduce/reduce conflicts (otherwise multiple
1299 attributes could be recognized here or in `attributes'). */
1300 | attributes setattrs notype_declarator
1327 struct_head identifier
'{'
1328 { $$
= start_struct
(RECORD_TYPE
, $2);
1329 /* Start scope of tag before parsing components. */
1331 component_decl_list
'}' maybe_attribute
1332 { $$
= finish_struct
($
<ttype
>4, $5, chainon
($1, $7)); }
1333 | struct_head
'{' component_decl_list
'}' maybe_attribute
1334 { $$
= finish_struct
(start_struct
(RECORD_TYPE
, NULL_TREE
),
1335 $3, chainon
($1, $5));
1337 | struct_head identifier
1338 { $$
= xref_tag
(RECORD_TYPE
, $2); }
1339 | union_head identifier
'{'
1340 { $$
= start_struct
(UNION_TYPE
, $2); }
1341 component_decl_list
'}' maybe_attribute
1342 { $$
= finish_struct
($
<ttype
>4, $5, chainon
($1, $7)); }
1343 | union_head
'{' component_decl_list
'}' maybe_attribute
1344 { $$
= finish_struct
(start_struct
(UNION_TYPE
, NULL_TREE
),
1345 $3, chainon
($1, $5));
1347 | union_head identifier
1348 { $$
= xref_tag
(UNION_TYPE
, $2); }
1349 | enum_head identifier
'{'
1350 { $
<itype
>3 = suspend_momentary
();
1351 $$
= start_enum
($2); }
1352 enumlist maybecomma_warn
'}' maybe_attribute
1353 { $$
= finish_enum
($
<ttype
>4, nreverse
($5), chainon
($1, $8));
1354 resume_momentary
($
<itype
>3); }
1356 { $
<itype
>2 = suspend_momentary
();
1357 $$
= start_enum
(NULL_TREE
); }
1358 enumlist maybecomma_warn
'}' maybe_attribute
1359 { $$
= finish_enum
($
<ttype
>3, nreverse
($4), chainon
($1, $7));
1360 resume_momentary
($
<itype
>2); }
1361 | enum_head identifier
1362 { $$
= xref_tag
(ENUMERAL_TYPE
, $2); }
1373 { if
(pedantic
&& ! flag_isoc9x
)
1374 pedwarn
("comma at end of enumerator list"); }
1377 component_decl_list:
1378 component_decl_list2
1380 | component_decl_list2 component_decl
1381 { $$
= chainon
($1, $2);
1382 pedwarn
("no semicolon at end of struct or union"); }
1385 component_decl_list2: /* empty */
1387 | component_decl_list2 component_decl
';'
1388 { $$
= chainon
($1, $2); }
1389 | component_decl_list2
';'
1391 pedwarn
("extra semicolon in struct or union specified"); }
1394 /* There is a shift-reduce conflict here, because `components' may
1395 start with a `typename'. It happens that shifting (the default resolution)
1396 does the right thing, because it treats the `typename' as part of
1397 a `typed_typespecs'.
1399 It is possible that this same technique would allow the distinction
1400 between `notype_initdecls' and `initdecls' to be eliminated.
1401 But I am being cautious and not trying it. */
1404 typed_typespecs setspecs components
1406 current_declspecs
= TREE_VALUE
(declspec_stack
);
1407 prefix_attributes
= TREE_PURPOSE
(declspec_stack
);
1408 declspec_stack
= TREE_CHAIN
(declspec_stack
);
1409 resume_momentary
($2); }
1410 | typed_typespecs setspecs save_filename save_lineno maybe_attribute
1412 /* Support for unnamed structs or unions as members of
1413 structs or unions (which is [a] useful and [b] supports
1416 pedwarn
("ANSI C doesn't support unnamed structs/unions");
1418 $$
= grokfield
($3, $4, NULL
, current_declspecs
, NULL_TREE
);
1419 current_declspecs
= TREE_VALUE
(declspec_stack
);
1420 prefix_attributes
= TREE_PURPOSE
(declspec_stack
);
1421 declspec_stack
= TREE_CHAIN
(declspec_stack
);
1422 resume_momentary
($2);
1424 | nonempty_type_quals setspecs components
1426 current_declspecs
= TREE_VALUE
(declspec_stack
);
1427 prefix_attributes
= TREE_PURPOSE
(declspec_stack
);
1428 declspec_stack
= TREE_CHAIN
(declspec_stack
);
1429 resume_momentary
($2); }
1430 | nonempty_type_quals
1432 pedwarn
("ANSI C forbids member declarations with no members");
1437 | extension component_decl
1439 RESTORE_WARN_FLAGS
($1); }
1443 component_declarator
1444 | components
',' component_declarator
1445 { $$
= chainon
($1, $3); }
1448 component_declarator:
1449 save_filename save_lineno declarator maybe_attribute
1450 { $$
= grokfield
($1, $2, $3, current_declspecs
, NULL_TREE
);
1451 decl_attributes
($$
, $4, prefix_attributes
); }
1452 | save_filename save_lineno
1453 declarator
':' expr_no_commas maybe_attribute
1454 { $$
= grokfield
($1, $2, $3, current_declspecs
, $5);
1455 decl_attributes
($$
, $6, prefix_attributes
); }
1456 | save_filename save_lineno
':' expr_no_commas maybe_attribute
1457 { $$
= grokfield
($1, $2, NULL_TREE
, current_declspecs
, $4);
1458 decl_attributes
($$
, $5, prefix_attributes
); }
1461 /* We chain the enumerators in reverse order.
1462 They are put in forward order where enumlist is used.
1463 (The order used to be significant, but no longer is so.
1464 However, we still maintain the order, just to be clean.) */
1468 | enumlist
',' enumerator
1469 { if
($1 == error_mark_node
)
1472 $$
= chainon
($3, $1); }
1474 { $$
= error_mark_node
; }
1480 { $$
= build_enumerator
($1, NULL_TREE
); }
1481 | identifier
'=' expr_no_commas
1482 { $$
= build_enumerator
($1, $3); }
1486 typed_typespecs absdcl
1487 { $$
= build_tree_list
($1, $2); }
1488 | nonempty_type_quals absdcl
1489 { $$
= build_tree_list
($1, $2); }
1492 absdcl: /* an absolute declarator */
1498 nonempty_type_quals:
1500 { $$
= tree_cons
(NULL_TREE
, $1, NULL_TREE
); }
1501 | nonempty_type_quals TYPE_QUAL
1502 { $$
= tree_cons
(NULL_TREE
, $2, $1); }
1508 | type_quals TYPE_QUAL
1509 { $$
= tree_cons
(NULL_TREE
, $2, $1); }
1512 absdcl1: /* a nonempty absolute declarator */
1515 /* `(typedef)1' is `int'. */
1516 |
'*' type_quals absdcl1 %prec UNARY
1517 { $$
= make_pointer_declarator
($2, $3); }
1518 |
'*' type_quals %prec UNARY
1519 { $$
= make_pointer_declarator
($2, NULL_TREE
); }
1520 | absdcl1
'(' parmlist %prec
'.'
1521 { $$
= build_nt
(CALL_EXPR
, $1, $3, NULL_TREE
); }
1522 | absdcl1
'[' expr
']' %prec
'.'
1523 { $$
= build_nt
(ARRAY_REF
, $1, $3); }
1524 | absdcl1
'[' ']' %prec
'.'
1525 { $$
= build_nt
(ARRAY_REF
, $1, NULL_TREE
); }
1526 |
'(' parmlist %prec
'.'
1527 { $$
= build_nt
(CALL_EXPR
, NULL_TREE
, $2, NULL_TREE
); }
1528 |
'[' expr
']' %prec
'.'
1529 { $$
= build_nt
(ARRAY_REF
, NULL_TREE
, $2); }
1531 { $$
= build_nt
(ARRAY_REF
, NULL_TREE
, NULL_TREE
); }
1532 /* ??? It appears we have to support attributes here, however
1533 using prefix_attributes is wrong. */
1534 | attributes setattrs absdcl1
1538 /* at least one statement, the first of which parses without error. */
1539 /* stmts is used only after decls, so an invalid first statement
1540 is actually regarded as an invalid decl and part of the decls. */
1543 lineno_stmt_or_labels
1546 pedwarn
("ANSI C forbids label at end of compound statement");
1550 lineno_stmt_or_labels:
1551 lineno_stmt_or_label
1552 | lineno_stmt_or_labels lineno_stmt_or_label
1554 | lineno_stmt_or_labels errstmt
1566 pushlevel: /* empty */
1567 { emit_line_note
(input_filename
, lineno
);
1571 expand_start_bindings
(0);
1575 /* Read zero or more forward-declarations for labels
1576 that nested functions can jump to. */
1581 pedwarn
("ANSI C forbids label declarations"); }
1586 | label_decls label_decl
1590 LABEL identifiers_or_typenames
';'
1592 for
(link
= $2; link
; link
= TREE_CHAIN
(link
))
1594 tree label
= shadow_label
(TREE_VALUE
(link
));
1595 C_DECLARED_LABEL_FLAG
(label
) = 1;
1596 declare_nonlocal_label
(label
);
1601 /* This is the body of a function definition.
1602 It causes syntax errors to ignore to the next openbrace. */
1609 compstmt_start: '{' { compstmt_count
++; }
1611 compstmt_nostart: '}'
1612 { $$
= convert
(void_type_node
, integer_zero_node
); }
1613 | pushlevel maybe_label_decls decls xstmts
'}'
1614 { emit_line_note
(input_filename
, lineno
);
1615 expand_end_bindings
(getdecls
(), 1, 0);
1616 $$
= poplevel
(1, 1, 0);
1617 if
(yychar == CONSTANT ||
yychar == STRING
)
1618 pop_momentary_nofree
();
1621 | pushlevel maybe_label_decls
error '}'
1622 { emit_line_note
(input_filename
, lineno
);
1623 expand_end_bindings
(getdecls
(), kept_level_p
(), 0);
1624 $$
= poplevel
(kept_level_p
(), 0, 0);
1625 if
(yychar == CONSTANT ||
yychar == STRING
)
1626 pop_momentary_nofree
();
1629 | pushlevel maybe_label_decls stmts
'}'
1630 { emit_line_note
(input_filename
, lineno
);
1631 expand_end_bindings
(getdecls
(), kept_level_p
(), 0);
1632 $$
= poplevel
(kept_level_p
(), 0, 0);
1633 if
(yychar == CONSTANT ||
yychar == STRING
)
1634 pop_momentary_nofree
();
1639 compstmt_primary_start:
1641 { if
(current_function_decl
== 0)
1643 error ("braced-group within expression allowed only inside a function");
1646 /* We must force a BLOCK for this level
1647 so that, if it is not expanded later,
1648 there is a way to turn off the entire subtree of blocks
1649 that are contained in it. */
1651 push_iterator_stack
();
1652 push_label_level
();
1653 $$
= expand_start_stmt_expr
();
1657 compstmt: compstmt_start compstmt_nostart
1661 /* Value is number of statements counted as of the closeparen. */
1663 if_prefix lineno_labeled_stmt
1664 /* Make sure c_expand_end_cond is run once
1665 for each call to c_expand_start_cond.
1666 Otherwise a crash is likely. */
1672 { emit_line_note
($
<filename
>-1, $
<lineno
>0);
1673 c_expand_start_cond
(truthvalue_conversion
($3), 0,
1675 $
<itype
>$
= stmt_count
;
1676 if_stmt_file
= $
<filename
>-1;
1677 if_stmt_line
= $
<lineno
>0;
1678 position_after_white_space
(); }
1681 /* This is a subroutine of stmt.
1682 It is used twice, once for valid DO statements
1683 and once for catching errors in parsing the end test. */
1688 emit_line_note
($
<filename
>-1, $
<lineno
>0);
1689 /* See comment in `while' alternative, above. */
1691 expand_start_loop_continue_elsewhere
(1);
1692 position_after_white_space
(); }
1693 lineno_labeled_stmt WHILE
1694 { expand_loop_continue_here
(); }
1698 { $$
= input_filename
; }
1705 lineno_labeled_stmt:
1706 save_filename save_lineno stmt
1708 /* | save_filename save_lineno error
1711 | save_filename save_lineno label lineno_labeled_stmt
1715 lineno_stmt_or_label:
1716 save_filename save_lineno stmt_or_label
1727 /* Parse a single real statement, not including any labels. */
1734 emit_line_note
($
<filename
>-1, $
<lineno
>0);
1735 /* It appears that this should not be done--that a non-lvalue array
1736 shouldn't get an error if the value isn't used.
1737 Section 3.2.2.1 says that an array lvalue gets converted to a pointer
1738 if it appears as a top-level expression,
1739 but says nothing about non-lvalue arrays. */
1741 /* Call default_conversion to get an error
1742 on referring to a register array if pedantic. */
1743 if
(TREE_CODE
(TREE_TYPE
($1)) == ARRAY_TYPE
1744 || TREE_CODE
(TREE_TYPE
($1)) == FUNCTION_TYPE
)
1745 $1 = default_conversion
($1);
1747 iterator_expand
($1);
1748 clear_momentary
(); }
1750 { c_expand_start_else
();
1751 $
<itype
>1 = stmt_count
;
1752 position_after_white_space
(); }
1754 { c_expand_end_cond
();
1755 if
(extra_warnings
&& stmt_count
== $
<itype
>1)
1756 warning
("empty body in an else-statement"); }
1757 | simple_if %prec IF
1758 { c_expand_end_cond
();
1759 /* This warning is here instead of in simple_if, because we
1760 do not want a warning if an empty if is followed by an
1761 else statement. Increment stmt_count so we don't
1762 give a second error if this is a nested `if'. */
1763 if
(extra_warnings
&& stmt_count
++ == $
<itype
>1)
1764 warning_with_file_and_line
(if_stmt_file
, if_stmt_line
,
1765 "empty body in an if-statement"); }
1766 /* Make sure c_expand_end_cond is run once
1767 for each call to c_expand_start_cond.
1768 Otherwise a crash is likely. */
1769 | simple_if ELSE
error
1770 { c_expand_end_cond
(); }
1773 emit_line_note
($
<filename
>-1, $
<lineno
>0);
1774 /* The emit_nop used to come before emit_line_note,
1775 but that made the nop seem like part of the preceding line.
1776 And that was confusing when the preceding line was
1777 inside of an if statement and was not really executed.
1778 I think it ought to work to put the nop after the line number.
1779 We will see. --rms, July 15, 1991. */
1782 { /* Don't start the loop till we have succeeded
1783 in parsing the end test. This is to make sure
1784 that we end every loop we start. */
1785 expand_start_loop
(1);
1786 emit_line_note
(input_filename
, lineno
);
1787 expand_exit_loop_if_false
(NULL_PTR
,
1788 truthvalue_conversion
($4));
1789 position_after_white_space
(); }
1791 { expand_end_loop
(); }
1794 { emit_line_note
(input_filename
, lineno
);
1795 expand_exit_loop_if_false
(NULL_PTR
,
1796 truthvalue_conversion
($3));
1798 clear_momentary
(); }
1799 /* This rule is needed to make sure we end every loop we start. */
1800 | do_stmt_start
error
1801 { expand_end_loop
();
1802 clear_momentary
(); }
1806 emit_line_note
($
<filename
>-1, $
<lineno
>0);
1807 /* See comment in `while' alternative, above. */
1809 if
($3) c_expand_expr_stmt
($3);
1810 /* Next step is to call expand_start_loop_continue_elsewhere,
1811 but wait till after we parse the entire for (...).
1812 Otherwise, invalid input might cause us to call that
1813 fn without calling expand_end_loop. */
1816 /* Can't emit now; wait till after expand_start_loop... */
1817 { $
<lineno
>7 = lineno
;
1818 $
<filename
>$
= input_filename
; }
1821 /* Start the loop. Doing this after parsing
1822 all the expressions ensures we will end the loop. */
1823 expand_start_loop_continue_elsewhere
(1);
1824 /* Emit the end-test, with a line number. */
1825 emit_line_note
($
<filename
>8, $
<lineno
>7);
1827 expand_exit_loop_if_false
(NULL_PTR
,
1828 truthvalue_conversion
($6));
1829 /* Don't let the tree nodes for $9 be discarded by
1830 clear_momentary during the parsing of the next stmt. */
1832 $
<lineno
>7 = lineno
;
1833 $
<filename
>8 = input_filename
;
1834 position_after_white_space
(); }
1836 { /* Emit the increment expression, with a line number. */
1837 emit_line_note
($
<filename
>8, $
<lineno
>7);
1838 expand_loop_continue_here
();
1840 c_expand_expr_stmt
($9);
1841 if
(yychar == CONSTANT ||
yychar == STRING
)
1842 pop_momentary_nofree
();
1845 expand_end_loop
(); }
1846 | SWITCH
'(' expr
')'
1848 emit_line_note
($
<filename
>-1, $
<lineno
>0);
1849 c_expand_start_case
($3);
1850 /* Don't let the tree nodes for $3 be discarded by
1851 clear_momentary during the parsing of the next stmt. */
1853 position_after_white_space
(); }
1855 { expand_end_case
($3);
1856 if
(yychar == CONSTANT ||
yychar == STRING
)
1857 pop_momentary_nofree
();
1862 emit_line_note
($
<filename
>-1, $
<lineno
>0);
1863 if
( ! expand_exit_something
())
1864 error ("break statement not within loop or switch"); }
1867 emit_line_note
($
<filename
>-1, $
<lineno
>0);
1868 if
(! expand_continue_loop
(NULL_PTR
))
1869 error ("continue statement not within a loop"); }
1872 emit_line_note
($
<filename
>-1, $
<lineno
>0);
1873 c_expand_return
(NULL_TREE
); }
1876 emit_line_note
($
<filename
>-1, $
<lineno
>0);
1877 c_expand_return
($2); }
1878 | ASM_KEYWORD maybe_type_qual
'(' expr
')' ';'
1880 emit_line_note
($
<filename
>-1, $
<lineno
>0);
1882 if
((TREE_CODE
($4) == ADDR_EXPR
1883 && TREE_CODE
(TREE_OPERAND
($4, 0)) == STRING_CST
)
1884 || TREE_CODE
($4) == STRING_CST
)
1887 error ("argument of `asm' is not a constant string"); }
1888 /* This is the case with just output operands. */
1889 | ASM_KEYWORD maybe_type_qual
'(' expr
':' asm_operands
')' ';'
1891 emit_line_note
($
<filename
>-1, $
<lineno
>0);
1892 c_expand_asm_operands
($4, $6, NULL_TREE
, NULL_TREE
,
1893 $2 == ridpointers
[(int)RID_VOLATILE
],
1894 input_filename
, lineno
); }
1895 /* This is the case with input operands as well. */
1896 | ASM_KEYWORD maybe_type_qual
'(' expr
':' asm_operands
':' asm_operands
')' ';'
1898 emit_line_note
($
<filename
>-1, $
<lineno
>0);
1899 c_expand_asm_operands
($4, $6, $8, NULL_TREE
,
1900 $2 == ridpointers
[(int)RID_VOLATILE
],
1901 input_filename
, lineno
); }
1902 /* This is the case with clobbered registers as well. */
1903 | ASM_KEYWORD maybe_type_qual
'(' expr
':' asm_operands
':'
1904 asm_operands
':' asm_clobbers
')' ';'
1906 emit_line_note
($
<filename
>-1, $
<lineno
>0);
1907 c_expand_asm_operands
($4, $6, $8, $10,
1908 $2 == ridpointers
[(int)RID_VOLATILE
],
1909 input_filename
, lineno
); }
1910 | GOTO identifier
';'
1913 emit_line_note
($
<filename
>-1, $
<lineno
>0);
1914 decl
= lookup_label
($2);
1917 TREE_USED
(decl
) = 1;
1923 pedwarn
("ANSI C forbids `goto *expr;'");
1925 emit_line_note
($
<filename
>-1, $
<lineno
>0);
1926 expand_computed_goto
(convert
(ptr_type_node
, $3)); }
1931 all_iter_stmt_simple
1932 /* | all_iter_stmt_with_decl */
1935 all_iter_stmt_simple:
1938 /* The value returned by this action is */
1939 /* 1 if everything is OK */
1940 /* 0 in case of error or already bound iterator */
1943 if
(TREE_CODE
($3) != VAR_DECL
)
1944 error ("invalid `for (ITERATOR)' syntax");
1945 else if
(! ITERATOR_P
($3))
1946 error ("`%s' is not an iterator",
1947 IDENTIFIER_POINTER
(DECL_NAME
($3)));
1948 else if
(ITERATOR_BOUND_P
($3))
1949 error ("`for (%s)' inside expansion of same iterator",
1950 IDENTIFIER_POINTER
(DECL_NAME
($3)));
1954 iterator_for_loop_start
($3);
1960 iterator_for_loop_end
($3);
1963 /* This really should allow any kind of declaration,
1964 for generality. Fix it before turning it back on.
1966 all_iter_stmt_with_decl:
1967 FOR '(' ITERATOR pushlevel setspecs iterator_spec ')'
1969 */ /* The value returned by this action is */
1970 /* 1 if everything is OK */
1971 /* 0 in case of error or already bound iterator */
1973 iterator_for_loop_start ($6);
1977 iterator_for_loop_end ($6);
1978 emit_line_note (input_filename, lineno);
1979 expand_end_bindings (getdecls (), 1, 0);
1980 $<ttype>$ = poplevel (1, 1, 0);
1981 if (yychar == CONSTANT || yychar == STRING)
1982 pop_momentary_nofree ();
1988 /* Any kind of label, including jump labels and case labels.
1989 ANSI C accepts labels only before statements, but we allow them
1990 also at the end of a compound statement. */
1992 label: CASE expr_no_commas
':'
1993 { register tree value
= check_case_value
($2);
1995 = build_decl
(LABEL_DECL
, NULL_TREE
, NULL_TREE
);
1999 if
(value
!= error_mark_node
)
2004 if
(pedantic
&& ! INTEGRAL_TYPE_P
(TREE_TYPE
(value
)))
2005 pedwarn
("label must have integral type in ANSI C");
2007 success
= pushcase
(value
, convert_and_check
,
2011 error ("case label not within a switch statement");
2012 else if
(success
== 2)
2014 error ("duplicate case value");
2015 error_with_decl
(duplicate
, "this is the first entry for that value");
2017 else if
(success
== 3)
2018 warning
("case value out of range");
2019 else if
(success
== 5)
2020 error ("case label within scope of cleanup or variable array");
2022 position_after_white_space
(); }
2023 | CASE expr_no_commas ELLIPSIS expr_no_commas
':'
2024 { register tree value1
= check_case_value
($2);
2025 register tree value2
= check_case_value
($4);
2027 = build_decl
(LABEL_DECL
, NULL_TREE
, NULL_TREE
);
2030 pedwarn
("ANSI C forbids case ranges");
2033 if
(value1
!= error_mark_node
&& value2
!= error_mark_node
)
2036 int success
= pushcase_range
(value1
, value2
,
2037 convert_and_check
, label
,
2040 error ("case label not within a switch statement");
2041 else if
(success
== 2)
2043 error ("duplicate case value");
2044 error_with_decl
(duplicate
, "this is the first entry for that value");
2046 else if
(success
== 3)
2047 warning
("case value out of range");
2048 else if
(success
== 4)
2049 warning
("empty case range");
2050 else if
(success
== 5)
2051 error ("case label within scope of cleanup or variable array");
2053 position_after_white_space
(); }
2058 = build_decl
(LABEL_DECL
, NULL_TREE
, NULL_TREE
);
2059 int success
= pushcase
(NULL_TREE
, 0, label
, &duplicate
);
2062 error ("default label not within a switch statement");
2063 else if
(success
== 2)
2065 error ("multiple default labels in one switch");
2066 error_with_decl
(duplicate
, "this is the first default label");
2068 position_after_white_space
(); }
2069 | identifier
':' maybe_attribute
2070 { tree label
= define_label
(input_filename
, lineno
, $1);
2075 expand_label
(label
);
2076 decl_attributes
(label
, $3, NULL_TREE
);
2078 position_after_white_space
(); }
2081 /* Either a type-qualifier or nothing. First thing in an `asm' statement. */
2085 { emit_line_note
(input_filename
, lineno
);
2088 { emit_line_note
(input_filename
, lineno
); }
2097 /* These are the operands other than the first string and colon
2098 in asm ("addextend %2,%1": "=dm" (x), "0" (y), "g" (*x)) */
2099 asm_operands: /* empty */
2101 | nonnull_asm_operands
2104 nonnull_asm_operands:
2106 | nonnull_asm_operands
',' asm_operand
2107 { $$
= chainon
($1, $3); }
2112 { $$
= build_tree_list
($1, $3); }
2117 { $$
= tree_cons
(NULL_TREE
, combine_strings
($1), NULL_TREE
); }
2118 | asm_clobbers
',' string
2119 { $$
= tree_cons
(NULL_TREE
, combine_strings
($3), $1); }
2122 /* This is what appears inside the parens in a function declarator.
2123 Its value is a list of ..._TYPE nodes. */
2126 clear_parm_order
();
2127 declare_parm_level
(0); }
2130 parmlist_tags_warning
();
2131 poplevel
(0, 0, 0); }
2139 pedwarn
("ANSI C forbids forward parameter declarations");
2140 /* Mark the forward decls as such. */
2141 for
(parm
= getdecls
(); parm
; parm
= TREE_CHAIN
(parm
))
2142 TREE_ASM_WRITTEN
(parm
) = 1;
2143 clear_parm_order
(); }
2147 { $$
= tree_cons
(NULL_TREE
, NULL_TREE
, NULL_TREE
); }
2150 /* This is what appears inside the parens in a function declarator.
2151 Is value is represented in the format that grokdeclarator expects. */
2152 parmlist_2: /* empty */
2153 { $$
= get_parm_info
(0); }
2155 { $$
= get_parm_info
(0);
2156 /* Gcc used to allow this as an extension. However, it does
2157 not work for all targets, and thus has been disabled.
2158 Also, since func (...) and func () are indistinguishable,
2159 it caused problems with the code in expand_builtin which
2160 tries to verify that BUILT_IN_NEXT_ARG is being used
2162 error ("ANSI C requires a named argument before `...'");
2165 { $$
= get_parm_info
(1); }
2166 | parms
',' ELLIPSIS
2167 { $$
= get_parm_info
(0); }
2172 { push_parm_decl
($1); }
2174 { push_parm_decl
($3); }
2177 /* A single parameter declaration or parameter type name,
2178 as found in a parmlist. */
2180 typed_declspecs setspecs parm_declarator maybe_attribute
2181 { $$
= build_tree_list
(build_tree_list
(current_declspecs
,
2183 build_tree_list
(prefix_attributes
,
2185 current_declspecs
= TREE_VALUE
(declspec_stack
);
2186 prefix_attributes
= TREE_PURPOSE
(declspec_stack
);
2187 declspec_stack
= TREE_CHAIN
(declspec_stack
);
2188 resume_momentary
($2); }
2189 | typed_declspecs setspecs notype_declarator maybe_attribute
2190 { $$
= build_tree_list
(build_tree_list
(current_declspecs
,
2192 build_tree_list
(prefix_attributes
,
2194 current_declspecs
= TREE_VALUE
(declspec_stack
);
2195 prefix_attributes
= TREE_PURPOSE
(declspec_stack
);
2196 declspec_stack
= TREE_CHAIN
(declspec_stack
);
2197 resume_momentary
($2); }
2198 | typed_declspecs setspecs absdcl maybe_attribute
2199 { $$
= build_tree_list
(build_tree_list
(current_declspecs
,
2201 build_tree_list
(prefix_attributes
,
2203 current_declspecs
= TREE_VALUE
(declspec_stack
);
2204 prefix_attributes
= TREE_PURPOSE
(declspec_stack
);
2205 declspec_stack
= TREE_CHAIN
(declspec_stack
);
2206 resume_momentary
($2); }
2207 | declmods setspecs notype_declarator maybe_attribute
2208 { $$
= build_tree_list
(build_tree_list
(current_declspecs
,
2210 build_tree_list
(prefix_attributes
,
2212 current_declspecs
= TREE_VALUE
(declspec_stack
);
2213 prefix_attributes
= TREE_PURPOSE
(declspec_stack
);
2214 declspec_stack
= TREE_CHAIN
(declspec_stack
);
2215 resume_momentary
($2); }
2217 | declmods setspecs absdcl maybe_attribute
2218 { $$
= build_tree_list
(build_tree_list
(current_declspecs
,
2220 build_tree_list
(prefix_attributes
,
2222 current_declspecs
= TREE_VALUE
(declspec_stack
);
2223 prefix_attributes
= TREE_PURPOSE
(declspec_stack
);
2224 declspec_stack
= TREE_CHAIN
(declspec_stack
);
2225 resume_momentary
($2); }
2228 /* This is used in a function definition
2229 where either a parmlist or an identifier list is ok.
2230 Its value is a list of ..._TYPE nodes or a list of identifiers. */
2231 parmlist_or_identifiers:
2233 clear_parm_order
();
2234 declare_parm_level
(1); }
2235 parmlist_or_identifiers_1
2237 parmlist_tags_warning
();
2238 poplevel
(0, 0, 0); }
2241 parmlist_or_identifiers_1:
2245 for
(t
= $1; t
; t
= TREE_CHAIN
(t
))
2246 if
(TREE_VALUE
(t
) == NULL_TREE
)
2247 error ("`...' in old-style identifier list");
2248 $$
= tree_cons
(NULL_TREE
, NULL_TREE
, $1); }
2251 /* A nonempty list of identifiers. */
2254 { $$
= build_tree_list
(NULL_TREE
, $1); }
2255 | identifiers
',' IDENTIFIER
2256 { $$
= chainon
($1, build_tree_list
(NULL_TREE
, $3)); }
2259 /* A nonempty list of identifiers, including typenames. */
2260 identifiers_or_typenames:
2262 { $$
= build_tree_list
(NULL_TREE
, $1); }
2263 | identifiers_or_typenames
',' identifier
2264 { $$
= chainon
($1, build_tree_list
(NULL_TREE
, $3)); }
2269 { $$
= SAVE_WARN_FLAGS
();
2271 warn_pointer_arith
= 0; }