2 * Stupid C parser, version 1e-6.
4 * Let's see how hard this is to do.
6 * Copyright (C) 2003 Transmeta Corp.
7 * 2003-2004 Linus Torvalds
8 * Copyright (C) 2004 Christopher Li
10 * Permission is hereby granted, free of charge, to any person obtaining a copy
11 * of this software and associated documentation files (the "Software"), to deal
12 * in the Software without restriction, including without limitation the rights
13 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
14 * copies of the Software, and to permit persons to whom the Software is
15 * furnished to do so, subject to the following conditions:
17 * The above copyright notice and this permission notice shall be included in
18 * all copies or substantial portions of the Software.
20 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
21 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
22 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
23 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
24 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
25 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
44 #include "expression.h"
47 static struct symbol_list
**function_symbol_list
;
48 struct symbol_list
*function_computed_target_list
;
49 struct statement_list
*function_computed_goto_list
;
51 static struct token
*statement(struct token
*token
, struct statement
**tree
);
52 static struct token
*handle_attributes(struct token
*token
, struct decl_state
*ctx
);
54 typedef struct token
*declarator_t(struct token
*, struct symbol
*, struct decl_state
*);
56 struct_specifier
, union_specifier
, enum_specifier
,
57 attribute_specifier
, typeof_specifier
,
58 storage_specifier
, thread_specifier
;
59 static declarator_t generic_qualifier
;
60 static declarator_t autotype_specifier
;
62 static struct token
*parse_if_statement(struct token
*token
, struct statement
*stmt
);
63 static struct token
*parse_return_statement(struct token
*token
, struct statement
*stmt
);
64 static struct token
*parse_loop_iterator(struct token
*token
, struct statement
*stmt
);
65 static struct token
*parse_default_statement(struct token
*token
, struct statement
*stmt
);
66 static struct token
*parse_case_statement(struct token
*token
, struct statement
*stmt
);
67 static struct token
*parse_switch_statement(struct token
*token
, struct statement
*stmt
);
68 static struct token
*parse_for_statement(struct token
*token
, struct statement
*stmt
);
69 static struct token
*parse_while_statement(struct token
*token
, struct statement
*stmt
);
70 static struct token
*parse_do_statement(struct token
*token
, struct statement
*stmt
);
71 static struct token
*parse_goto_statement(struct token
*token
, struct statement
*stmt
);
72 static struct token
*parse_context_statement(struct token
*token
, struct statement
*stmt
);
73 static struct token
*parse_range_statement(struct token
*token
, struct statement
*stmt
);
74 static struct token
*parse_asm_statement(struct token
*token
, struct statement
*stmt
);
75 static struct token
*toplevel_asm_declaration(struct token
*token
, struct symbol_list
**list
);
76 static struct token
*parse_static_assert(struct token
*token
, struct symbol_list
**unused
);
77 static struct token
*ignore_seg_gs(struct token
*token
, struct symbol_list
**unused
);
79 typedef struct token
*attr_t(struct token
*, struct symbol
*,
83 attribute_packed
, attribute_aligned
, attribute_cleanup
,
87 attribute_address_space
, attribute_context
,
88 attribute_designated_init
,
89 attribute_transparent_union
, ignore_attribute
,
90 attribute_mode
, attribute_force
;
92 typedef struct symbol
*to_mode_t(struct symbol
*);
95 to_QI_mode
, to_HI_mode
, to_SI_mode
, to_DI_mode
, to_TI_mode
;
96 static to_mode_t to_pointer_mode
, to_word_mode
;
111 Set_Any
= Set_T
| Set_Short
| Set_Long
| Set_Signed
| Set_Unsigned
115 CInt
= 0, CSInt
, CUInt
, CReal
,
118 static void asm_modifier(struct token
*token
, unsigned long *mods
, unsigned long mod
)
121 warning(token
->pos
, "duplicated asm modifier");
125 static struct symbol_op typedef_op
= {
127 .declarator
= storage_specifier
,
130 static struct symbol_op inline_op
= {
132 .declarator
= generic_qualifier
,
133 .asm_modifier
= asm_modifier
,
136 static struct symbol_op noreturn_op
= {
138 .declarator
= generic_qualifier
,
141 static declarator_t alignas_specifier
;
142 static struct symbol_op alignas_op
= {
144 .declarator
= alignas_specifier
,
147 static struct symbol_op auto_op
= {
149 .declarator
= storage_specifier
,
152 static struct symbol_op register_op
= {
154 .declarator
= storage_specifier
,
157 static struct symbol_op static_op
= {
158 .type
= KW_MODIFIER
|KW_STATIC
,
159 .declarator
= storage_specifier
,
162 static struct symbol_op extern_op
= {
164 .declarator
= storage_specifier
,
167 static struct symbol_op thread_op
= {
169 .declarator
= thread_specifier
,
172 static struct symbol_op const_op
= {
173 .type
= KW_QUALIFIER
,
174 .declarator
= generic_qualifier
,
177 static struct symbol_op volatile_op
= {
178 .type
= KW_QUALIFIER
,
179 .declarator
= generic_qualifier
,
180 .asm_modifier
= asm_modifier
,
183 static struct symbol_op restrict_op
= {
184 .type
= KW_QUALIFIER
,
185 .declarator
= generic_qualifier
,
188 static struct symbol_op atomic_op
= {
189 .type
= KW_QUALIFIER
,
190 .declarator
= generic_qualifier
,
193 static struct symbol_op typeof_op
= {
194 .type
= KW_SPECIFIER
,
195 .declarator
= typeof_specifier
,
200 static struct symbol_op autotype_op
= {
201 .type
= KW_SPECIFIER
,
202 .declarator
= autotype_specifier
,
207 static struct symbol_op attribute_op
= {
208 .type
= KW_ATTRIBUTE
,
209 .declarator
= attribute_specifier
,
212 static struct symbol_op struct_op
= {
213 .type
= KW_SPECIFIER
,
214 .declarator
= struct_specifier
,
219 static struct symbol_op union_op
= {
220 .type
= KW_SPECIFIER
,
221 .declarator
= union_specifier
,
226 static struct symbol_op enum_op
= {
227 .type
= KW_SPECIFIER
,
228 .declarator
= enum_specifier
,
233 static struct symbol_op spec_op
= {
234 .type
= KW_SPECIFIER
| KW_EXACT
,
239 static struct symbol_op char_op
= {
240 .type
= KW_SPECIFIER
,
241 .test
= Set_T
|Set_Long
|Set_Short
,
242 .set
= Set_T
|Set_Char
,
246 static struct symbol_op int_op
= {
247 .type
= KW_SPECIFIER
,
249 .set
= Set_T
|Set_Int
,
252 static struct symbol_op double_op
= {
253 .type
= KW_SPECIFIER
,
254 .test
= Set_T
|Set_Signed
|Set_Unsigned
|Set_Short
|Set_Vlong
,
255 .set
= Set_T
|Set_Double
,
259 static struct symbol_op float_op
= {
260 .type
= KW_SPECIFIER
,
261 .test
= Set_T
|Set_Signed
|Set_Unsigned
|Set_Short
|Set_Long
,
262 .set
= Set_T
|Set_Float
,
266 static struct symbol_op short_op
= {
267 .type
= KW_SPECIFIER
,
268 .test
= Set_S
|Set_Char
|Set_Float
|Set_Double
|Set_Long
|Set_Short
,
272 static struct symbol_op signed_op
= {
273 .type
= KW_SPECIFIER
,
274 .test
= Set_S
|Set_Float
|Set_Double
|Set_Signed
|Set_Unsigned
,
279 static struct symbol_op unsigned_op
= {
280 .type
= KW_SPECIFIER
,
281 .test
= Set_S
|Set_Float
|Set_Double
|Set_Signed
|Set_Unsigned
,
286 static struct symbol_op long_op
= {
287 .type
= KW_SPECIFIER
,
288 .test
= Set_S
|Set_Char
|Set_Float
|Set_Short
|Set_Vlong
,
292 static struct symbol_op int128_op
= {
293 .type
= KW_SPECIFIER
,
294 .test
= Set_S
|Set_T
|Set_Char
|Set_Short
|Set_Int
|Set_Float
|Set_Double
|Set_Long
|Set_Vlong
|Set_Int128
,
295 .set
= Set_T
|Set_Int128
|Set_Vlong
,
299 static struct symbol_op if_op
= {
300 .statement
= parse_if_statement
,
303 static struct symbol_op return_op
= {
304 .statement
= parse_return_statement
,
307 static struct symbol_op loop_iter_op
= {
308 .statement
= parse_loop_iterator
,
311 static struct symbol_op default_op
= {
312 .statement
= parse_default_statement
,
315 static struct symbol_op case_op
= {
316 .statement
= parse_case_statement
,
319 static struct symbol_op switch_op
= {
320 .statement
= parse_switch_statement
,
323 static struct symbol_op for_op
= {
324 .statement
= parse_for_statement
,
327 static struct symbol_op while_op
= {
328 .statement
= parse_while_statement
,
331 static struct symbol_op do_op
= {
332 .statement
= parse_do_statement
,
335 static struct symbol_op goto_op
= {
336 .statement
= parse_goto_statement
,
339 static struct symbol_op __context___op
= {
340 .statement
= parse_context_statement
,
341 .attribute
= attribute_context
,
344 static struct symbol_op range_op
= {
345 .statement
= parse_range_statement
,
348 static struct symbol_op asm_op
= {
350 .statement
= parse_asm_statement
,
351 .toplevel
= toplevel_asm_declaration
,
354 static struct symbol_op static_assert_op
= {
355 .toplevel
= parse_static_assert
,
358 static struct symbol_op seg_gs
= {
359 .toplevel
= ignore_seg_gs
,
362 static struct symbol_op packed_op
= {
363 .attribute
= attribute_packed
,
366 static struct symbol_op aligned_op
= {
367 .attribute
= attribute_aligned
,
370 static struct symbol_op cleanup_op
= {
371 .attribute
= attribute_cleanup
,
374 static struct symbol_op attr_mod_op
= {
375 .attribute
= attribute_modifier
,
378 static struct symbol_op attr_fun_op
= {
379 .attribute
= attribute_function
,
382 static struct symbol_op attr_bitwise_op
= {
383 .attribute
= attribute_bitwise
,
386 static struct symbol_op attr_force_op
= {
387 .attribute
= attribute_force
,
390 static struct symbol_op address_space_op
= {
391 .attribute
= attribute_address_space
,
394 static struct symbol_op mode_op
= {
395 .attribute
= attribute_mode
,
398 static struct symbol_op context_op
= {
399 .attribute
= attribute_context
,
402 static struct symbol_op designated_init_op
= {
403 .attribute
= attribute_designated_init
,
406 static struct symbol_op transparent_union_op
= {
407 .attribute
= attribute_transparent_union
,
410 static struct symbol_op ignore_attr_op
= {
411 .attribute
= ignore_attribute
,
414 static struct symbol_op mode_QI_op
= {
416 .to_mode
= to_QI_mode
419 static struct symbol_op mode_HI_op
= {
421 .to_mode
= to_HI_mode
424 static struct symbol_op mode_SI_op
= {
426 .to_mode
= to_SI_mode
429 static struct symbol_op mode_DI_op
= {
431 .to_mode
= to_DI_mode
434 static struct symbol_op mode_TI_op
= {
436 .to_mode
= to_TI_mode
439 static struct symbol_op mode_pointer_op
= {
441 .to_mode
= to_pointer_mode
444 static struct symbol_op mode_word_op
= {
446 .to_mode
= to_word_mode
450 * Define the keyword and their effects.
451 * The entries in the 'typedef' and put in NS_TYPEDEF and
452 * are automatically set as reserved keyword while the ones
453 * in the 'keyword' table are just put in NS_KEYWORD.
455 * The entries are added via the 3 macros:
456 * N() for entries with "name" only,
457 * D() for entries with "name" & "__name__",
458 * A() for entries with "name", "__name" & "__name__",
459 * U() for entries with "__name" & "__name__".
461 static struct init_keyword
{
463 struct symbol_op
*op
;
467 #define N(I, O,...) { I, O,##__VA_ARGS__ }
468 #define D(I, O,...) N(I,O,##__VA_ARGS__ ), \
469 N("__" I "__",O,##__VA_ARGS__)
470 #define A(I, O,...) N(I,O,##__VA_ARGS__ ), \
471 N("__" I,O,##__VA_ARGS__), \
472 N("__" I "__",O,##__VA_ARGS__)
473 #define U(I, O,...) N("__" I,O,##__VA_ARGS__), \
474 N("__" I "__",O,##__VA_ARGS__)
475 /* Storage classes */
476 N("auto", &auto_op
, .mods
= MOD_AUTO
),
477 N("register", ®ister_op
, .mods
= MOD_REGISTER
),
478 N("static", &static_op
, .mods
= MOD_STATIC
),
479 N("extern", &extern_op
, .mods
= MOD_EXTERN
),
480 N("__thread", &thread_op
),
481 N("_Thread_local", &thread_op
),
483 A("inline", &inline_op
, .mods
= MOD_INLINE
),
486 N("typedef", &typedef_op
, .mods
= MOD_USERTYPE
),
487 A("typeof", &typeof_op
),
488 N("__auto_type", &autotype_op
),
490 /* Type qualifiers */
491 A("const", &const_op
, .mods
= MOD_CONST
),
492 A("volatile", &volatile_op
, .mods
= MOD_VOLATILE
),
493 A("restrict", &restrict_op
, .mods
= MOD_RESTRICT
),
495 N("_Atomic", &atomic_op
, .mods
= MOD_ATOMIC
),
496 N("_Noreturn", &noreturn_op
, .mods
= MOD_NORETURN
),
497 N("_Alignas", &alignas_op
),
499 U("attribute", &attribute_op
),
501 /* Type specifiers */
502 N("struct", &struct_op
),
503 N("union", &union_op
),
506 N("void", &spec_op
, .type
= &void_ctype
),
508 N("short", &short_op
),
511 N("float", &float_op
),
512 N("double", &double_op
),
513 A("signed", &signed_op
),
514 N("unsigned", &unsigned_op
),
515 N("__int128", &int128_op
),
516 N("_Bool", &spec_op
, .type
= &bool_ctype
),
518 /* Predeclared types */
519 N("__builtin_va_list", &spec_op
, .type
= &ptr_ctype
),
520 N("__builtin_ms_va_list",&spec_op
, .type
= &ptr_ctype
),
521 N("__int128_t", &spec_op
, .type
= &sint128_ctype
),
522 N("__uint128_t", &spec_op
, .type
= &uint128_ctype
),
523 N("_Float32", &spec_op
, .type
= &float32_ctype
),
524 N("_Float32x", &spec_op
, .type
= &float32x_ctype
),
525 N("_Float64", &spec_op
, .type
= &float64_ctype
),
526 N("_Float64x", &spec_op
, .type
= &float64x_ctype
),
527 N("_Float128", &spec_op
, .type
= &float128_ctype
),
528 N("__float128", &spec_op
, .type
= &float128_ctype
),
530 N("__seg_gs", &seg_gs
),
535 N("return", &return_op
),
536 N("break", &loop_iter_op
),
537 N("continue", &loop_iter_op
),
538 N("default", &default_op
),
540 N("switch", &switch_op
),
542 N("while", &while_op
),
546 N("context", &context_op
),
547 N("__context__", &__context___op
),
548 N("__range__", &range_op
),
549 N("_Static_assert", &static_assert_op
),
552 D("packed", &packed_op
),
553 D("aligned", &aligned_op
),
554 D("__cleanup__", &cleanup_op
),
555 D("nocast", &attr_mod_op
, .mods
= MOD_NOCAST
),
556 D("noderef", &attr_mod_op
, .mods
= MOD_NODEREF
),
557 D("safe", &attr_mod_op
, .mods
= MOD_SAFE
),
558 D("unused", &attr_mod_op
, .mods
= MOD_UNUSED
),
559 D("externally_visible", &attr_mod_op
, .mods
= MOD_EXT_VISIBLE
),
560 D("force", &attr_force_op
),
561 D("bitwise", &attr_bitwise_op
, .mods
= MOD_BITWISE
),
562 D("address_space", &address_space_op
),
563 D("designated_init", &designated_init_op
),
564 D("transparent_union", &transparent_union_op
),
565 D("noreturn", &attr_fun_op
, .mods
= MOD_NORETURN
),
566 D("pure", &attr_fun_op
, .mods
= MOD_PURE
),
567 A("const", &attr_fun_op
, .mods
= MOD_PURE
),
568 D("gnu_inline", &attr_fun_op
, .mods
= MOD_GNU_INLINE
),
572 D("QI", &mode_QI_op
),
573 D("HI", &mode_HI_op
),
574 D("SI", &mode_SI_op
),
575 D("DI", &mode_DI_op
),
576 D("TI", &mode_TI_op
),
577 D("byte", &mode_QI_op
),
578 D("pointer", &mode_pointer_op
),
579 D("word", &mode_word_op
),
583 static const char *ignored_attributes
[] = {
585 #define GCC_ATTR(x) \
587 STRINGIFY(__##x##__),
589 #include "gcc-attr-list.h"
601 static void init_keyword(int stream
, struct init_keyword
*kw
, enum namespace ns
)
603 struct symbol
*sym
= create_symbol(stream
, kw
->name
, SYM_KEYWORD
, ns
);
604 sym
->ident
->keyword
= 1;
605 sym
->ident
->reserved
|= (ns
== NS_TYPEDEF
);
606 sym
->ctype
.modifiers
= kw
->mods
;
607 sym
->ctype
.base_type
= kw
->type
;
611 void init_parser(int stream
)
615 for (i
= 0; i
< ARRAY_SIZE(typedefs
); i
++)
616 init_keyword(stream
, &typedefs
[i
], NS_TYPEDEF
);
617 for (i
= 0; i
< ARRAY_SIZE(keywords
); i
++)
618 init_keyword(stream
, &keywords
[i
], NS_KEYWORD
);
620 for (i
= 0; i
< ARRAY_SIZE(ignored_attributes
); i
++) {
621 const char * name
= ignored_attributes
[i
];
622 struct symbol
*sym
= create_symbol(stream
, name
, SYM_KEYWORD
,
625 sym
->ident
->keyword
= 1;
626 sym
->op
= &ignore_attr_op
;
632 static struct token
*skip_to(struct token
*token
, int op
)
634 while (!match_op(token
, op
) && !eof_token(token
))
639 static struct token bad_token
= { .pos
.type
= TOKEN_BAD
};
640 struct token
*expect(struct token
*token
, int op
, const char *where
)
642 if (!match_op(token
, op
)) {
643 if (token
!= &bad_token
) {
644 bad_token
.next
= token
;
645 sparse_error(token
->pos
, "Expected %s %s", show_special(op
), where
);
646 sparse_error(token
->pos
, "got %s", show_token(token
));
649 return skip_to(token
, op
);
656 // issue an error message on new parsing errors
657 // @token: the current token
658 // @errmsg: the error message
659 // If the current token is from a previous error, an error message
660 // has already been issued, so nothing more is done.
661 // Otherwise, @errmsg is displayed followed by the current token.
662 static void unexpected(struct token
*token
, const char *errmsg
)
664 if (token
== &bad_token
)
666 sparse_error(token
->pos
, "%s", errmsg
);
667 sparse_error(token
->pos
, "got %s", show_token(token
));
670 // Add a symbol to the list of function-local symbols
671 static void fn_local_symbol(struct symbol
*sym
)
673 if (function_symbol_list
)
674 add_symbol(function_symbol_list
, sym
);
677 struct statement
*alloc_statement(struct position pos
, int type
)
679 struct statement
*stmt
= __alloc_statement(0);
685 static struct token
*struct_declaration_list(struct token
*token
, struct symbol_list
**list
);
687 static void apply_ctype(struct position pos
, struct ctype
*dst
, struct ctype
*src
);
689 static void apply_modifiers(struct position pos
, struct decl_state
*ctx
)
691 struct symbol
*ctype
;
694 ctype
= ctx
->mode
->to_mode(ctx
->ctype
.base_type
);
696 sparse_error(pos
, "don't know how to apply mode to %s",
697 show_typename(ctx
->ctype
.base_type
));
699 ctx
->ctype
.base_type
= ctype
;
703 static struct symbol
* alloc_indirect_symbol(struct position pos
, struct ctype
*ctype
, int type
)
705 struct symbol
*sym
= alloc_symbol(pos
, type
);
707 sym
->ctype
.base_type
= ctype
->base_type
;
708 sym
->ctype
.modifiers
= ctype
->modifiers
;
710 ctype
->base_type
= sym
;
711 ctype
->modifiers
= 0;
716 * NOTE! NS_LABEL is not just a different namespace,
717 * it also ends up using function scope instead of the
718 * regular symbol scope.
720 struct symbol
*label_symbol(struct token
*token
, int used
)
722 struct symbol
*sym
= lookup_symbol(token
->ident
, NS_LABEL
);
724 sym
= alloc_symbol(token
->pos
, SYM_LABEL
);
725 bind_symbol(sym
, token
->ident
, NS_LABEL
);
728 fn_local_symbol(sym
);
733 static struct token
*struct_union_enum_specifier(enum type type
,
734 struct token
*token
, struct decl_state
*ctx
,
735 struct token
*(*parse
)(struct token
*, struct symbol
*))
737 struct decl_state attr
= { };
739 struct position
*repos
;
741 token
= handle_attributes(token
, &attr
);
742 if (token_type(token
) == TOKEN_IDENT
) {
743 sym
= lookup_symbol(token
->ident
, NS_STRUCT
);
745 (is_outer_scope(sym
->scope
) &&
746 (match_op(token
->next
,';') || match_op(token
->next
,'{')))) {
747 // Either a new symbol, or else an out-of-scope
748 // symbol being redefined.
749 sym
= alloc_symbol(token
->pos
, type
);
750 bind_symbol(sym
, token
->ident
, NS_STRUCT
);
752 if (sym
->type
!= type
)
753 error_die(token
->pos
, "invalid tag applied to %s", show_typename (sym
));
754 ctx
->ctype
.base_type
= sym
;
757 if (!match_op(token
, '{'))
760 // The following test is actually wrong for empty
761 // structs, but (1) they are not C99, (2) gcc does
762 // the same thing, and (3) it's easier.
763 if (sym
->symbol_list
)
764 error_die(token
->pos
, "redefinition of %s", show_typename (sym
));
767 // Mark the structure as needing re-examination
769 } else if (match_op(token
, '{')) {
770 // private struct/union/enum type
771 sym
= alloc_symbol(token
->pos
, type
);
772 set_current_scope(sym
); // used by dissect
773 ctx
->ctype
.base_type
= sym
;
775 sparse_error(token
->pos
, "expected declaration");
776 ctx
->ctype
.base_type
= &bad_ctype
;
780 token
= parse(token
->next
, sym
);
781 token
= expect(token
, '}', "at end of specifier");
782 attr
.ctype
.base_type
= sym
;
783 token
= handle_attributes(token
, &attr
);
784 apply_ctype(token
->pos
, &sym
->ctype
, &attr
.ctype
);
785 sym
->packed
= attr
.packed
;
787 sym
->endpos
= token
->pos
;
792 static struct token
*parse_struct_declaration(struct token
*token
, struct symbol
*sym
)
794 struct symbol
*field
, *last
= NULL
;
796 res
= struct_declaration_list(token
, &sym
->symbol_list
);
797 FOR_EACH_PTR(sym
->symbol_list
, field
) {
799 struct symbol
*base
= field
->ctype
.base_type
;
800 if (base
&& base
->type
== SYM_BITFIELD
)
804 last
->next_subobject
= field
;
806 } END_FOR_EACH_PTR(field
);
810 static struct token
*parse_union_declaration(struct token
*token
, struct symbol
*sym
)
812 return struct_declaration_list(token
, &sym
->symbol_list
);
815 static struct token
*struct_specifier(struct token
*token
, struct symbol
*sym
, struct decl_state
*ctx
)
817 return struct_union_enum_specifier(SYM_STRUCT
, token
, ctx
, parse_struct_declaration
);
820 static struct token
*union_specifier(struct token
*token
, struct symbol
*sym
, struct decl_state
*ctx
)
822 return struct_union_enum_specifier(SYM_UNION
, token
, ctx
, parse_union_declaration
);
828 // This allow to use a shift amount as big (or bigger)
829 // than the width of the value to be shifted, in which case
830 // the result is, of course, 0.
831 static unsigned long long rshift(unsigned long long val
, unsigned int n
)
833 if (n
>= (sizeof(val
) * 8))
840 unsigned long long pos
;
843 static void update_range(struct range
*range
, unsigned long long uval
, struct symbol
*vtype
)
845 long long sval
= uval
;
847 if (is_signed_type(vtype
) && (sval
< 0)) {
848 if (sval
< range
->neg
)
851 if (uval
> range
->pos
)
856 static int type_is_ok(struct symbol
*type
, struct range range
)
858 int shift
= type
->bit_size
;
859 int is_unsigned
= type
->ctype
.modifiers
& MOD_UNSIGNED
;
863 if (rshift(range
.pos
, shift
))
869 if (rshift(~range
.neg
, shift
))
874 static struct range
type_range(struct symbol
*type
)
877 unsigned int size
= type
->bit_size
;
878 unsigned long long max
;
881 if (is_signed_type(type
)) {
882 min
= sign_bit(size
);
886 max
= bits_mask(size
);
894 static int val_in_range(struct range
*range
, long long sval
, struct symbol
*vtype
)
896 unsigned long long uval
= sval
;
898 if (is_signed_type(vtype
) && (sval
< 0))
899 return range
->neg
<= sval
;
901 return uval
<= range
->pos
;
904 static void cast_enum_list(struct symbol_list
*list
, struct symbol
*base_type
)
906 struct range irange
= type_range(&int_ctype
);
909 FOR_EACH_PTR(list
, sym
) {
910 struct expression
*expr
= sym
->initializer
;
911 struct symbol
*ctype
;
913 if (expr
->type
!= EXPR_VALUE
)
916 val
= get_expression_value(expr
);
917 if (is_int_type(ctype
) && val_in_range(&irange
, val
, ctype
)) {
918 expr
->ctype
= &int_ctype
;
921 cast_value(expr
, base_type
, expr
);
922 } END_FOR_EACH_PTR(sym
);
925 static struct token
*parse_enum_declaration(struct token
*token
, struct symbol
*parent
)
927 unsigned long long lastval
= 0;
928 struct symbol
*ctype
= NULL
, *base_type
= NULL
;
929 struct range range
= { };
932 parent
->examined
= 1;
933 parent
->ctype
.base_type
= &int_ctype
;
934 while (token_type(token
) == TOKEN_IDENT
) {
935 struct expression
*expr
= NULL
;
936 struct token
*next
= token
->next
;
937 struct decl_state ctx
= { };
940 // FIXME: only 'deprecated' should be accepted
941 next
= handle_attributes(next
, &ctx
);
943 if (match_op(next
, '=')) {
944 next
= constant_expression(next
->next
, &expr
);
945 lastval
= get_expression_value(expr
);
947 if (expr
&& expr
->ctype
)
951 } else if (is_int_type(ctype
)) {
954 error_die(token
->pos
, "can't increment the last enum member");
958 expr
= alloc_expression(token
->pos
, EXPR_VALUE
);
959 expr
->value
= lastval
;
963 sym
= alloc_symbol(token
->pos
, SYM_NODE
);
964 bind_symbol(sym
, token
->ident
, NS_SYMBOL
);
965 sym
->ctype
.modifiers
&= ~MOD_ADDRESSABLE
;
966 sym
->initializer
= expr
;
967 sym
->enum_member
= 1;
968 sym
->ctype
.base_type
= parent
;
969 add_ptr_list(&parent
->symbol_list
, sym
);
971 if (base_type
!= &bad_ctype
) {
972 if (ctype
->type
== SYM_NODE
)
973 ctype
= ctype
->ctype
.base_type
;
974 if (ctype
->type
== SYM_ENUM
) {
978 ctype
= ctype
->ctype
.base_type
;
982 * - if all enums are of the same type, then
983 * the base_type is that type (two first
985 * - if enums are of different types, they
986 * all have to be integer types, and the
987 * base type is at least "int_ctype".
988 * - otherwise the base_type is "bad_ctype".
990 if (!base_type
|| ctype
== &bad_ctype
) {
992 } else if (ctype
== base_type
) {
994 } else if (is_int_type(base_type
) && is_int_type(ctype
)) {
995 base_type
= &int_ctype
;
996 } else if (is_restricted_type(base_type
) != is_restricted_type(ctype
)) {
997 if (!mix_bitwise
++) {
998 warning(expr
->pos
, "mixed bitwiseness");
1000 } else if (is_restricted_type(base_type
) && base_type
!= ctype
) {
1001 sparse_error(expr
->pos
, "incompatible restricted type");
1002 info(expr
->pos
, " expected: %s", show_typename(base_type
));
1003 info(expr
->pos
, " got: %s", show_typename(ctype
));
1004 base_type
= &bad_ctype
;
1005 } else if (base_type
!= &bad_ctype
) {
1006 sparse_error(token
->pos
, "bad enum definition");
1007 base_type
= &bad_ctype
;
1009 parent
->ctype
.base_type
= base_type
;
1011 if (is_int_type(base_type
)) {
1012 update_range(&range
, lastval
, ctype
);
1016 sym
->endpos
= token
->pos
;
1018 if (!match_op(token
, ','))
1020 token
= token
->next
;
1023 sparse_error(token
->pos
, "empty enum definition");
1024 base_type
= &bad_ctype
;
1026 else if (!is_int_type(base_type
))
1028 else if (type_is_ok(&uint_ctype
, range
))
1029 base_type
= &uint_ctype
;
1030 else if (type_is_ok(&int_ctype
, range
))
1031 base_type
= &int_ctype
;
1032 else if (type_is_ok(&ulong_ctype
, range
))
1033 base_type
= &ulong_ctype
;
1034 else if (type_is_ok(&long_ctype
, range
))
1035 base_type
= &long_ctype
;
1036 else if (type_is_ok(&ullong_ctype
, range
))
1037 base_type
= &ullong_ctype
;
1038 else if (type_is_ok(&llong_ctype
, range
))
1039 base_type
= &llong_ctype
;
1041 base_type
= &bad_ctype
;
1042 parent
->ctype
.base_type
= base_type
;
1043 parent
->ctype
.modifiers
|= (base_type
->ctype
.modifiers
& MOD_UNSIGNED
);
1044 parent
->examined
= 0;
1048 cast_enum_list(parent
->symbol_list
, base_type
);
1053 static struct token
*enum_specifier(struct token
*token
, struct symbol
*sym
, struct decl_state
*ctx
)
1055 struct token
*ret
= struct_union_enum_specifier(SYM_ENUM
, token
, ctx
, parse_enum_declaration
);
1056 struct ctype
*ctype
= &ctx
->ctype
.base_type
->ctype
;
1058 if (!ctype
->base_type
)
1059 ctype
->base_type
= &incomplete_ctype
;
1064 static struct token
*typeof_specifier(struct token
*token
, struct symbol
*sym
, struct decl_state
*ctx
)
1067 if (!match_op(token
, '(')) {
1068 sparse_error(token
->pos
, "expected '(' after typeof");
1071 if (lookup_type(token
->next
)) {
1073 token
= typename(token
->next
, &sym
, NULL
);
1074 ctx
->ctype
.base_type
= sym
->ctype
.base_type
;
1075 apply_ctype(token
->pos
, &ctx
->ctype
, &sym
->ctype
);
1077 struct symbol
*typeof_sym
= alloc_symbol(token
->pos
, SYM_TYPEOF
);
1078 token
= parse_expression(token
->next
, &typeof_sym
->initializer
);
1080 typeof_sym
->endpos
= token
->pos
;
1081 if (!typeof_sym
->initializer
) {
1082 sparse_error(token
->pos
, "expected expression after the '(' token");
1083 typeof_sym
= &bad_ctype
;
1085 ctx
->ctype
.base_type
= typeof_sym
;
1087 return expect(token
, ')', "after typeof");
1090 static struct token
*autotype_specifier(struct token
*token
, struct symbol
*sym
, struct decl_state
*ctx
)
1092 ctx
->ctype
.base_type
= &autotype_ctype
;
1097 static struct token
*ignore_attribute(struct token
*token
, struct symbol
*attr
, struct decl_state
*ctx
)
1099 struct expression
*expr
= NULL
;
1100 if (match_op(token
, '('))
1101 token
= parens_expression(token
, &expr
, "in attribute");
1105 static struct token
*attribute_packed(struct token
*token
, struct symbol
*attr
, struct decl_state
*ctx
)
1107 if (!ctx
->ctype
.alignment
) {
1108 ctx
->ctype
.alignment
= 1;
1114 static struct token
*attribute_aligned(struct token
*token
, struct symbol
*attr
, struct decl_state
*ctx
)
1116 int alignment
= max_alignment
;
1117 struct expression
*expr
= NULL
;
1119 if (match_op(token
, '(')) {
1120 token
= parens_expression(token
, &expr
, "in attribute");
1122 alignment
= const_expression_value(expr
);
1124 if (alignment
& (alignment
-1)) {
1125 warning(token
->pos
, "I don't like non-power-of-2 alignments");
1127 } else if (alignment
> ctx
->ctype
.alignment
)
1128 ctx
->ctype
.alignment
= alignment
;
1132 static struct token
*attribute_cleanup(struct token
*token
, struct symbol
*attr
, struct decl_state
*ctx
)
1134 struct expression
*expr
= NULL
;
1136 if (match_op(token
, '(')) {
1137 token
= parens_expression(token
, &expr
, "in attribute");
1138 if (expr
&& expr
->type
== EXPR_SYMBOL
)
1139 ctx
->cleanup
= expr
;
1144 static void apply_mod(struct position
*pos
, unsigned long *mods
, unsigned long mod
)
1146 if (*mods
& mod
& ~MOD_DUP_OK
)
1147 warning(*pos
, "duplicate %s", modifier_name(mod
));
1151 static void apply_qualifier(struct position
*pos
, struct ctype
*ctx
, unsigned long qual
)
1153 apply_mod(pos
, &ctx
->modifiers
, qual
);
1156 static struct token
*attribute_modifier(struct token
*token
, struct symbol
*attr
, struct decl_state
*ctx
)
1158 apply_mod(&token
->pos
, &ctx
->ctype
.modifiers
, attr
->ctype
.modifiers
);
1162 static struct token
*attribute_function(struct token
*token
, struct symbol
*attr
, struct decl_state
*ctx
)
1164 apply_mod(&token
->pos
, &ctx
->f_modifiers
, attr
->ctype
.modifiers
);
1168 static struct token
*attribute_bitwise(struct token
*token
, struct symbol
*attr
, struct decl_state
*ctx
)
1171 attribute_modifier(token
, attr
, ctx
);
1175 static struct ident
*numerical_address_space(int asn
)
1181 sprintf(buff
, "<asn:%d>", asn
);
1182 return built_in_ident(buff
);
1185 static struct token
*attribute_address_space(struct token
*token
, struct symbol
*attr
, struct decl_state
*ctx
)
1187 struct expression
*expr
= NULL
;
1188 struct ident
*as
= NULL
;
1191 token
= expect(token
, '(', "after address_space attribute");
1192 switch (token_type(token
)) {
1194 next
= primary_expression(token
, &expr
);
1195 if (expr
->type
!= EXPR_VALUE
)
1197 as
= numerical_address_space(expr
->value
);
1207 warning(token
->pos
, "invalid address space name");
1210 if (Waddress_space
&& as
) {
1212 sparse_error(token
->pos
,
1213 "multiple address spaces given: %s & %s",
1214 show_as(ctx
->ctype
.as
), show_as(as
));
1217 token
= expect(next
, ')', "after address_space attribute");
1221 static struct symbol
*to_QI_mode(struct symbol
*ctype
)
1223 if (ctype
->ctype
.base_type
!= &int_type
)
1225 if (ctype
== &char_ctype
)
1227 return ctype
->ctype
.modifiers
& MOD_UNSIGNED
? &uchar_ctype
1231 static struct symbol
*to_HI_mode(struct symbol
*ctype
)
1233 if (ctype
->ctype
.base_type
!= &int_type
)
1235 return ctype
->ctype
.modifiers
& MOD_UNSIGNED
? &ushort_ctype
1239 static struct symbol
*to_SI_mode(struct symbol
*ctype
)
1241 if (ctype
->ctype
.base_type
!= &int_type
)
1243 return ctype
->ctype
.modifiers
& MOD_UNSIGNED
? &uint_ctype
1247 static struct symbol
*to_DI_mode(struct symbol
*ctype
)
1249 if (ctype
->ctype
.base_type
!= &int_type
)
1251 return ctype
->ctype
.modifiers
& MOD_UNSIGNED
? &ullong_ctype
1255 static struct symbol
*to_TI_mode(struct symbol
*ctype
)
1257 if (ctype
->ctype
.base_type
!= &int_type
)
1259 return ctype
->ctype
.modifiers
& MOD_UNSIGNED
? &uint128_ctype
1263 static struct symbol
*to_pointer_mode(struct symbol
*ctype
)
1265 if (ctype
->ctype
.base_type
!= &int_type
)
1267 return ctype
->ctype
.modifiers
& MOD_UNSIGNED
? uintptr_ctype
1271 static struct symbol
*to_word_mode(struct symbol
*ctype
)
1273 if (ctype
->ctype
.base_type
!= &int_type
)
1275 return ctype
->ctype
.modifiers
& MOD_UNSIGNED
? &ulong_ctype
1279 static struct token
*attribute_mode(struct token
*token
, struct symbol
*attr
, struct decl_state
*ctx
)
1281 token
= expect(token
, '(', "after mode attribute");
1282 if (token_type(token
) == TOKEN_IDENT
) {
1283 struct symbol
*mode
= lookup_keyword(token
->ident
, NS_KEYWORD
);
1284 if (mode
&& mode
->op
->type
& KW_MODE
)
1285 ctx
->mode
= mode
->op
;
1287 sparse_error(token
->pos
, "unknown mode attribute %s", show_ident(token
->ident
));
1288 token
= token
->next
;
1290 sparse_error(token
->pos
, "expect attribute mode symbol\n");
1291 token
= expect(token
, ')', "after mode attribute");
1295 static struct token
*attribute_context(struct token
*token
, struct symbol
*attr
, struct decl_state
*ctx
)
1297 struct context
*context
= alloc_context();
1298 struct expression
*args
[3];
1301 token
= expect(token
, '(', "after context attribute");
1302 token
= conditional_expression(token
, &args
[0]);
1303 token
= expect(token
, ',', "after context 1st argument");
1304 token
= conditional_expression(token
, &args
[1]);
1305 if (match_op(token
, ',')) {
1306 token
= token
->next
;
1307 token
= conditional_expression(token
, &args
[2]);
1308 token
= expect(token
, ')', "after context 3rd argument");
1309 context
->context
= args
[0];
1312 token
= expect(token
, ')', "after context 2nd argument");
1314 context
->in
= get_expression_value(args
[idx
++]);
1315 context
->out
= get_expression_value(args
[idx
++]);
1316 add_ptr_list(&ctx
->ctype
.contexts
, context
);
1320 static struct token
*attribute_designated_init(struct token
*token
, struct symbol
*attr
, struct decl_state
*ctx
)
1322 if (ctx
->ctype
.base_type
&& ctx
->ctype
.base_type
->type
== SYM_STRUCT
)
1323 ctx
->ctype
.base_type
->designated_init
= 1;
1325 warning(token
->pos
, "attribute designated_init applied to non-structure type");
1329 static struct token
*attribute_transparent_union(struct token
*token
, struct symbol
*attr
, struct decl_state
*ctx
)
1331 if (Wtransparent_union
)
1332 warning(token
->pos
, "attribute __transparent_union__");
1334 if (ctx
->ctype
.base_type
&& ctx
->ctype
.base_type
->type
== SYM_UNION
)
1335 ctx
->ctype
.base_type
->transparent_union
= 1;
1337 warning(token
->pos
, "attribute __transparent_union__ applied to non-union type");
1341 static struct token
*recover_unknown_attribute(struct token
*token
)
1343 struct expression
*expr
= NULL
;
1345 if (Wunknown_attribute
)
1346 warning(token
->pos
, "unknown attribute '%s'", show_ident(token
->ident
));
1347 token
= token
->next
;
1348 if (match_op(token
, '('))
1349 token
= parens_expression(token
, &expr
, "in attribute");
1353 static struct token
*attribute_specifier(struct token
*token
, struct symbol
*sym
, struct decl_state
*ctx
)
1355 token
= expect(token
, '(', "after attribute");
1356 token
= expect(token
, '(', "after attribute");
1358 while (token_type(token
) == TOKEN_IDENT
) {
1359 struct symbol
*attr
= lookup_keyword(token
->ident
, NS_KEYWORD
);
1360 if (attr
&& attr
->op
->attribute
)
1361 token
= attr
->op
->attribute(token
->next
, attr
, ctx
);
1363 token
= recover_unknown_attribute(token
);
1365 if (!match_op(token
, ','))
1367 token
= token
->next
;
1370 token
= expect(token
, ')', "after attribute");
1371 token
= expect(token
, ')', "after attribute");
1375 static unsigned long decl_modifiers(struct decl_state
*ctx
)
1377 unsigned long mods
= ctx
->ctype
.modifiers
& MOD_DECLARE
;
1378 ctx
->ctype
.modifiers
&= ~MOD_DECLARE
;
1379 return ctx
->storage_class
| mods
;
1382 static struct token
*storage_specifier(struct token
*next
, struct symbol
*sym
, struct decl_state
*ctx
)
1384 int is_tls
= ctx
->ctype
.modifiers
& MOD_TLS
;
1385 unsigned long class = sym
->ctype
.modifiers
;
1386 const char *storage
= modifier_name(class);
1388 /* __thread can be used alone, or with extern or static */
1389 if (is_tls
&& (class & ~(MOD_STATIC
|MOD_EXTERN
)))
1390 sparse_error(next
->pos
, "__thread cannot be used with '%s'", storage
);
1391 else if (!ctx
->storage_class
)
1392 ctx
->storage_class
= class;
1393 else if (ctx
->storage_class
== class)
1394 sparse_error(next
->pos
, "duplicate %s", storage
);
1396 sparse_error(next
->pos
, "multiple storage classes");
1400 static struct token
*thread_specifier(struct token
*next
, struct symbol
*sym
, struct decl_state
*ctx
)
1402 /* This GCC extension can be used alone, or with extern or static */
1403 if (!(ctx
->storage_class
& ~(MOD_STATIC
|MOD_EXTERN
))) {
1404 apply_qualifier(&next
->pos
, &ctx
->ctype
, MOD_TLS
);
1406 sparse_error(next
->pos
, "__thread cannot be used with '%s'",
1407 modifier_name(ctx
->storage_class
));
1413 static struct token
*attribute_force(struct token
*token
, struct symbol
*attr
, struct decl_state
*ctx
)
1419 static struct token
*alignas_specifier(struct token
*token
, struct symbol
*sym
, struct decl_state
*ctx
)
1423 if (!match_op(token
, '(')) {
1424 sparse_error(token
->pos
, "expected '(' after _Alignas");
1427 if (lookup_type(token
->next
)) {
1428 struct symbol
*sym
= NULL
;
1429 token
= typename(token
->next
, &sym
, NULL
);
1430 sym
= examine_symbol_type(sym
);
1431 alignment
= sym
->ctype
.alignment
;
1432 token
= expect(token
, ')', "after _Alignas(...");
1434 struct expression
*expr
= NULL
;
1435 token
= parens_expression(token
, &expr
, "after _Alignas");
1438 alignment
= const_expression_value(expr
);
1441 if (alignment
< 0) {
1442 warning(token
->pos
, "non-positive alignment");
1445 if (alignment
& (alignment
-1)) {
1446 warning(token
->pos
, "non-power-of-2 alignment");
1449 if (alignment
> ctx
->ctype
.alignment
)
1450 ctx
->ctype
.alignment
= alignment
;
1454 static struct token
*generic_qualifier(struct token
*next
, struct symbol
*sym
, struct decl_state
*ctx
)
1456 apply_qualifier(&next
->pos
, &ctx
->ctype
, sym
->ctype
.modifiers
);
1460 static void apply_ctype(struct position pos
, struct ctype
*dst
, struct ctype
*src
)
1462 unsigned long mod
= src
->modifiers
;
1465 apply_qualifier(&pos
, dst
, mod
);
1468 concat_ptr_list((struct ptr_list
*)src
->contexts
,
1469 (struct ptr_list
**)&dst
->contexts
);
1472 if (src
->alignment
> dst
->alignment
)
1473 dst
->alignment
= src
->alignment
;
1480 static void specifier_conflict(struct position pos
, int what
, struct ident
*new)
1483 if (what
& (Set_S
| Set_T
))
1485 if (what
& Set_Char
)
1487 else if (what
& Set_Double
)
1489 else if (what
& Set_Float
)
1491 else if (what
& Set_Signed
)
1493 else if (what
& Set_Unsigned
)
1495 else if (what
& Set_Short
)
1497 else if (what
& Set_Long
)
1501 sparse_error(pos
, "impossible combination of type specifiers: %s %s",
1502 old
, show_ident(new));
1506 sparse_error(pos
, "two or more data types in declaration specifiers");
1509 static struct symbol
* const int_types
[] =
1510 {&char_ctype
, &short_ctype
, &int_ctype
, &long_ctype
, &llong_ctype
, &int128_ctype
};
1511 static struct symbol
* const signed_types
[] =
1512 {&schar_ctype
, &sshort_ctype
, &sint_ctype
, &slong_ctype
, &sllong_ctype
,
1514 static struct symbol
* const unsigned_types
[] =
1515 {&uchar_ctype
, &ushort_ctype
, &uint_ctype
, &ulong_ctype
, &ullong_ctype
,
1517 static struct symbol
* const real_types
[] =
1518 {&float_ctype
, &double_ctype
, &ldouble_ctype
};
1519 static struct symbol
* const * const types
[] = {
1520 [CInt
] = int_types
+ 2,
1521 [CSInt
] = signed_types
+ 2,
1522 [CUInt
] = unsigned_types
+ 2,
1523 [CReal
] = real_types
+ 1,
1526 struct symbol
*ctype_integer(int size
, int want_unsigned
)
1528 return types
[want_unsigned
? CUInt
: CInt
][size
];
1531 static struct token
*handle_qualifiers(struct token
*t
, struct decl_state
*ctx
)
1533 while (token_type(t
) == TOKEN_IDENT
) {
1534 struct symbol
*s
= lookup_keyword(t
->ident
, NS_TYPEDEF
);
1537 if (!(s
->op
->type
& (KW_ATTRIBUTE
| KW_QUALIFIER
)))
1540 if (s
->op
->declarator
)
1541 t
= s
->op
->declarator(t
, s
, ctx
);
1546 static struct token
*declaration_specifiers(struct token
*token
, struct decl_state
*ctx
)
1552 while (token_type(token
) == TOKEN_IDENT
) {
1553 struct symbol
*s
= lookup_symbol(token
->ident
,
1554 NS_TYPEDEF
| NS_SYMBOL
);
1555 if (!s
|| !(s
->namespace & NS_TYPEDEF
))
1557 if (s
->type
!= SYM_KEYWORD
) {
1560 seen
|= Set_S
| Set_T
;
1561 ctx
->ctype
.base_type
= s
->ctype
.base_type
;
1562 apply_ctype(token
->pos
, &ctx
->ctype
, &s
->ctype
);
1563 token
= token
->next
;
1566 if (s
->op
->type
& KW_SPECIFIER
) {
1567 if (seen
& s
->op
->test
) {
1568 specifier_conflict(token
->pos
,
1574 class += s
->op
->class;
1575 if (s
->op
->set
& Set_Int128
)
1577 else if (s
->op
->set
& Set_Char
)
1579 if (s
->op
->set
& (Set_Short
|Set_Float
)) {
1581 } else if (s
->op
->set
& Set_Long
&& rank
++) {
1582 if (class == CReal
) {
1583 specifier_conflict(token
->pos
,
1591 token
= token
->next
;
1592 if (s
->op
->declarator
) // Note: this eats attributes
1593 token
= s
->op
->declarator(token
, s
, ctx
);
1594 if (s
->op
->type
& KW_EXACT
) {
1595 ctx
->ctype
.base_type
= s
->ctype
.base_type
;
1596 ctx
->ctype
.modifiers
|= s
->ctype
.modifiers
;
1600 if (!(seen
& Set_S
)) { /* not set explicitly? */
1601 struct symbol
*base
= &incomplete_ctype
;
1603 base
= types
[class][rank
];
1604 ctx
->ctype
.base_type
= base
;
1607 if (ctx
->ctype
.modifiers
& MOD_BITWISE
) {
1608 struct symbol
*type
;
1609 ctx
->ctype
.modifiers
&= ~MOD_BITWISE
;
1610 if (!is_int_type(ctx
->ctype
.base_type
)) {
1611 sparse_error(token
->pos
, "invalid modifier");
1614 type
= alloc_symbol(token
->pos
, SYM_BASETYPE
);
1615 *type
= *ctx
->ctype
.base_type
;
1616 type
->ctype
.modifiers
&= ~MOD_SPECIFIER
;
1617 type
->ctype
.base_type
= ctx
->ctype
.base_type
;
1618 type
->type
= SYM_RESTRICT
;
1619 ctx
->ctype
.base_type
= type
;
1620 create_fouled(type
);
1625 static struct token
*abstract_array_declarator(struct token
*token
, struct symbol
*sym
)
1627 struct expression
*expr
= NULL
;
1630 while (token_type(token
) == TOKEN_IDENT
) {
1631 struct symbol
*sym
= lookup_keyword(token
->ident
, NS_TYPEDEF
);
1632 if (!sym
|| !(sym
->op
->type
& (KW_STATIC
|KW_QUALIFIER
)))
1634 if (has_static
&& (sym
->op
->type
& KW_STATIC
))
1635 sparse_error(token
->pos
, "duplicate array static declarator");
1636 has_static
|= (sym
->op
->type
& KW_STATIC
);
1637 token
= token
->next
;
1639 if (match_op(token
, '*') && match_op(token
->next
, ']')) {
1640 // FIXME: '[*]' is treated like '[]'
1641 token
= token
->next
;
1643 token
= assignment_expression(token
, &expr
);
1645 sym
->array_size
= expr
;
1649 static struct token
*parameter_type_list(struct token
*, struct symbol
*);
1650 static struct token
*identifier_list(struct token
*, struct symbol
*);
1651 static struct token
*declarator(struct token
*token
, struct decl_state
*ctx
);
1653 static struct token
*handle_asm_name(struct token
*token
, struct decl_state
*ctx
)
1655 struct expression
*expr
;
1656 struct symbol
*keyword
;
1658 if (token_type(token
) != TOKEN_IDENT
)
1660 keyword
= lookup_keyword(token
->ident
, NS_KEYWORD
);
1663 if (!(keyword
->op
->type
& KW_ASM
))
1666 token
= token
->next
;
1667 token
= expect(token
, '(', "after asm");
1668 token
= string_expression(token
, &expr
, "asm name");
1669 token
= expect(token
, ')', "after asm");
1674 // test if @token is '__attribute__' (or one of its variant)
1675 static bool match_attribute(struct token
*token
)
1679 if (token_type(token
) != TOKEN_IDENT
)
1681 sym
= lookup_keyword(token
->ident
, NS_TYPEDEF
);
1682 if (!sym
|| !sym
->op
)
1684 return sym
->op
->type
& KW_ATTRIBUTE
;
1687 static struct token
*skip_attribute(struct token
*token
)
1689 token
= token
->next
;
1690 if (match_op(token
, '(')) {
1692 token
= token
->next
;
1693 while (depth
&& !eof_token(token
)) {
1694 if (token_type(token
) == TOKEN_SPECIAL
) {
1695 if (token
->special
== '(')
1697 else if (token
->special
== ')')
1700 token
= token
->next
;
1706 static struct token
*skip_attributes(struct token
*token
)
1708 while (match_attribute(token
)) {
1709 token
= expect(token
->next
, '(', "after attribute");
1710 token
= expect(token
, '(', "after attribute");
1711 while (token_type(token
) == TOKEN_IDENT
) {
1712 token
= skip_attribute(token
);
1713 if (!match_op(token
, ','))
1715 token
= token
->next
;
1717 token
= expect(token
, ')', "after attribute");
1718 token
= expect(token
, ')', "after attribute");
1723 static struct token
*handle_attributes(struct token
*token
, struct decl_state
*ctx
)
1725 while (match_attribute(token
))
1726 token
= attribute_specifier(token
->next
, NULL
, ctx
);
1730 static int is_nested(struct token
*token
, struct token
**p
,
1731 int prefer_abstract
)
1734 * This can be either a parameter list or a grouping.
1735 * For the direct (non-abstract) case, we know if must be
1736 * a parameter list if we already saw the identifier.
1737 * For the abstract case, we know if must be a parameter
1738 * list if it is empty or starts with a type.
1740 struct token
*next
= token
->next
;
1742 *p
= next
= skip_attributes(next
);
1744 if (token_type(next
) == TOKEN_IDENT
) {
1745 if (lookup_type(next
))
1746 return !prefer_abstract
;
1750 if (match_op(next
, ')') || match_op(next
, SPECIAL_ELLIPSIS
))
1757 Empty
, K_R
, Proto
, Bad_Func
,
1760 static enum kind
which_func(struct token
*token
,
1762 int prefer_abstract
)
1764 struct token
*next
= token
->next
;
1766 if (token_type(next
) == TOKEN_IDENT
) {
1767 if (lookup_type(next
))
1769 /* identifier list not in definition; complain */
1770 if (prefer_abstract
)
1772 "identifier list not in definition");
1776 if (token_type(next
) != TOKEN_SPECIAL
)
1779 if (next
->special
== ')') {
1780 /* don't complain about those */
1781 if (!n
|| match_op(next
->next
, ';') || match_op(next
->next
, ','))
1783 if (Wstrict_prototypes
)
1785 "non-ANSI function declaration of function '%s'",
1790 if (next
->special
== SPECIAL_ELLIPSIS
) {
1792 "variadic functions must have one named argument");
1799 static struct token
*direct_declarator(struct token
*token
, struct decl_state
*ctx
)
1801 struct ctype
*ctype
= &ctx
->ctype
;
1803 struct ident
**p
= ctx
->ident
;
1805 if (ctx
->ident
&& token_type(token
) == TOKEN_IDENT
) {
1806 *ctx
->ident
= token
->ident
;
1807 token
= token
->next
;
1808 } else if (match_op(token
, '(') &&
1809 is_nested(token
, &next
, ctx
->prefer_abstract
)) {
1810 struct symbol
*base_type
= ctype
->base_type
;
1811 if (token
->next
!= next
)
1812 next
= handle_attributes(token
->next
, ctx
);
1813 token
= declarator(next
, ctx
);
1814 token
= expect(token
, ')', "in nested declarator");
1815 while (ctype
->base_type
!= base_type
)
1816 ctype
= &ctype
->base_type
->ctype
;
1820 if (match_op(token
, '(')) {
1821 enum kind kind
= which_func(token
, p
, ctx
->prefer_abstract
);
1823 fn
= alloc_indirect_symbol(token
->pos
, ctype
, SYM_FN
);
1824 ctype
->modifiers
|= ctx
->f_modifiers
;
1825 token
= token
->next
;
1827 token
= identifier_list(token
, fn
);
1828 else if (kind
== Proto
)
1829 token
= parameter_type_list(token
, fn
);
1830 token
= expect(token
, ')', "in function declarator");
1831 fn
->endpos
= token
->pos
;
1835 while (match_op(token
, '[')) {
1836 struct symbol
*array
;
1837 array
= alloc_indirect_symbol(token
->pos
, ctype
, SYM_ARRAY
);
1838 token
= abstract_array_declarator(token
->next
, array
);
1839 token
= expect(token
, ']', "in abstract_array_declarator");
1840 array
->endpos
= token
->pos
;
1841 ctype
= &array
->ctype
;
1846 static struct token
*pointer(struct token
*token
, struct decl_state
*ctx
)
1848 while (match_op(token
,'*')) {
1849 struct symbol
*ptr
= alloc_symbol(token
->pos
, SYM_PTR
);
1850 ptr
->ctype
.modifiers
= ctx
->ctype
.modifiers
;
1851 ptr
->ctype
.base_type
= ctx
->ctype
.base_type
;
1852 ptr
->ctype
.as
= ctx
->ctype
.as
;
1853 ptr
->ctype
.contexts
= ctx
->ctype
.contexts
;
1854 ctx
->ctype
.modifiers
= 0;
1855 ctx
->ctype
.base_type
= ptr
;
1856 ctx
->ctype
.as
= NULL
;
1857 ctx
->ctype
.contexts
= NULL
;
1858 ctx
->ctype
.alignment
= 0;
1860 token
= handle_qualifiers(token
->next
, ctx
);
1861 ctx
->ctype
.base_type
->endpos
= token
->pos
;
1866 static struct token
*declarator(struct token
*token
, struct decl_state
*ctx
)
1868 token
= pointer(token
, ctx
);
1869 return direct_declarator(token
, ctx
);
1872 static struct token
*handle_bitfield(struct token
*token
, struct decl_state
*ctx
)
1874 struct ctype
*ctype
= &ctx
->ctype
;
1875 struct expression
*expr
;
1876 struct symbol
*bitfield
;
1879 if (ctype
->base_type
!= &int_type
&& !is_int_type(ctype
->base_type
)) {
1880 sparse_error(token
->pos
, "invalid bitfield specifier for type %s.",
1881 show_typename(ctype
->base_type
));
1882 // Parse this to recover gracefully.
1883 return conditional_expression(token
->next
, &expr
);
1886 bitfield
= alloc_indirect_symbol(token
->pos
, ctype
, SYM_BITFIELD
);
1887 token
= conditional_expression(token
->next
, &expr
);
1888 width
= const_expression_value(expr
);
1889 bitfield
->bit_size
= width
;
1891 if (width
< 0 || width
> INT_MAX
|| (*ctx
->ident
&& width
== 0)) {
1892 sparse_error(token
->pos
, "bitfield '%s' has invalid width (%lld)",
1893 show_ident(*ctx
->ident
), width
);
1895 } else if (*ctx
->ident
) {
1896 struct symbol
*base_type
= bitfield
->ctype
.base_type
;
1897 struct symbol
*bitfield_type
= base_type
== &int_type
? bitfield
: base_type
;
1898 int is_signed
= !(bitfield_type
->ctype
.modifiers
& MOD_UNSIGNED
);
1899 if (Wone_bit_signed_bitfield
&& width
== 1 && is_signed
) {
1900 // Valid values are either {-1;0} or {0}, depending on integer
1901 // representation. The latter makes for very efficient code...
1902 sparse_error(token
->pos
, "dubious one-bit signed bitfield");
1904 if (Wdefault_bitfield_sign
&&
1905 bitfield_type
->type
!= SYM_ENUM
&&
1906 !(bitfield_type
->ctype
.modifiers
& MOD_EXPLICITLY_SIGNED
) &&
1908 // The sign of bitfields is unspecified by default.
1909 warning(token
->pos
, "dubious bitfield without explicit `signed' or `unsigned'");
1912 bitfield
->bit_size
= width
;
1913 bitfield
->endpos
= token
->pos
;
1914 bitfield
->ident
= *ctx
->ident
;
1918 static struct token
*declaration_list(struct token
*token
, struct symbol_list
**list
)
1920 struct decl_state ctx
= {.prefer_abstract
= 0};
1924 token
= declaration_specifiers(token
, &ctx
);
1925 mod
= decl_modifiers(&ctx
);
1928 struct symbol
*decl
= alloc_symbol(token
->pos
, SYM_NODE
);
1930 ctx
.ident
= &decl
->ident
;
1932 token
= declarator(token
, &ctx
);
1933 if (match_op(token
, ':'))
1934 token
= handle_bitfield(token
, &ctx
);
1936 token
= handle_attributes(token
, &ctx
);
1937 apply_modifiers(token
->pos
, &ctx
);
1939 decl
->ctype
= ctx
.ctype
;
1940 decl
->ctype
.modifiers
|= mod
;
1941 decl
->cleanup
= ctx
.cleanup
;
1942 decl
->endpos
= token
->pos
;
1943 add_symbol(list
, decl
);
1944 if (!match_op(token
, ','))
1946 token
= token
->next
;
1952 static struct token
*struct_declaration_list(struct token
*token
, struct symbol_list
**list
)
1954 while (!match_op(token
, '}')) {
1955 if (match_ident(token
, &_Static_assert_ident
)) {
1956 token
= parse_static_assert(token
, NULL
);
1959 if (!match_op(token
, ';'))
1960 token
= declaration_list(token
, list
);
1961 if (!match_op(token
, ';')) {
1962 sparse_error(token
->pos
, "expected ; at end of declaration");
1965 token
= token
->next
;
1970 static struct token
*parameter_declaration(struct token
*token
, struct symbol
*sym
)
1972 struct decl_state ctx
= {.prefer_abstract
= 1};
1974 token
= declaration_specifiers(token
, &ctx
);
1975 ctx
.ident
= &sym
->ident
;
1976 token
= declarator(token
, &ctx
);
1977 token
= handle_attributes(token
, &ctx
);
1978 apply_modifiers(token
->pos
, &ctx
);
1979 sym
->ctype
= ctx
.ctype
;
1980 sym
->ctype
.modifiers
|= decl_modifiers(&ctx
);
1981 sym
->endpos
= token
->pos
;
1982 sym
->forced_arg
= ctx
.forced
;
1986 struct token
*typename(struct token
*token
, struct symbol
**p
, int *forced
)
1988 struct decl_state ctx
= {.prefer_abstract
= 1};
1989 unsigned long class;
1990 struct symbol
*sym
= alloc_symbol(token
->pos
, SYM_NODE
);
1992 token
= declaration_specifiers(token
, &ctx
);
1993 token
= declarator(token
, &ctx
);
1994 apply_modifiers(token
->pos
, &ctx
);
1995 sym
->ctype
= ctx
.ctype
;
1996 sym
->cleanup
= ctx
.cleanup
;
1997 sym
->endpos
= token
->pos
;
1998 class = ctx
.storage_class
;
2000 *forced
= ctx
.forced
;
2002 warning(sym
->pos
, "storage class in typename (%s%s)",
2003 modifier_string(class), show_typename(sym
));
2007 static struct token
*parse_underscore_Pragma(struct token
*token
)
2012 if (!match_op(next
, '('))
2015 if (next
->pos
.type
!= TOKEN_STRING
)
2018 if (!match_op(next
, ')'))
2023 static struct token
*expression_statement(struct token
*token
, struct expression
**tree
)
2025 if (match_ident(token
, &_Pragma_ident
))
2026 return parse_underscore_Pragma(token
);
2028 token
= parse_expression(token
, tree
);
2029 return expect(token
, ';', "at end of statement");
2032 static struct token
*parse_asm_operands(struct token
*token
, struct statement
*stmt
,
2033 struct asm_operand_list
**inout
)
2035 /* Allow empty operands */
2036 if (match_op(token
->next
, ':') || match_op(token
->next
, ')'))
2039 struct asm_operand
*op
= __alloc_asm_operand(0);
2040 if (match_op(token
->next
, '[') &&
2041 token_type(token
->next
->next
) == TOKEN_IDENT
&&
2042 match_op(token
->next
->next
->next
, ']')) {
2043 op
->name
= token
->next
->next
->ident
;
2044 token
= token
->next
->next
->next
;
2046 token
= token
->next
;
2047 token
= string_expression(token
, &op
->constraint
, "asm constraint");
2048 token
= parens_expression(token
, &op
->expr
, "in asm parameter");
2049 add_ptr_list(inout
, op
);
2050 } while (match_op(token
, ','));
2054 static struct token
*parse_asm_clobbers(struct token
*token
, struct statement
*stmt
,
2055 struct expression_list
**clobbers
)
2057 struct expression
*expr
;
2060 token
= primary_expression(token
->next
, &expr
);
2062 add_expression(clobbers
, expr
);
2063 } while (match_op(token
, ','));
2067 static struct token
*parse_asm_labels(struct token
*token
, struct statement
*stmt
,
2068 struct symbol_list
**labels
)
2070 struct symbol
*label
;
2073 token
= token
->next
; /* skip ':' and ',' */
2074 if (token_type(token
) != TOKEN_IDENT
)
2076 label
= label_symbol(token
, 1);
2077 add_symbol(labels
, label
);
2078 token
= token
->next
;
2079 } while (match_op(token
, ','));
2083 static struct token
*parse_asm_statement(struct token
*token
, struct statement
*stmt
)
2085 unsigned long mods
= 0;
2087 token
= token
->next
;
2088 stmt
->type
= STMT_ASM
;
2089 while (token_type(token
) == TOKEN_IDENT
) {
2090 struct symbol
*s
= lookup_keyword(token
->ident
, NS_TYPEDEF
);
2091 if (s
&& s
->op
->asm_modifier
)
2092 s
->op
->asm_modifier(token
, &mods
, s
->ctype
.modifiers
);
2093 else if (token
->ident
== &goto_ident
)
2094 asm_modifier(token
, &mods
, MOD_ASM_GOTO
);
2095 token
= token
->next
;
2097 token
= expect(token
, '(', "after asm");
2098 token
= string_expression(token
, &stmt
->asm_string
, "inline asm");
2099 if (match_op(token
, ':'))
2100 token
= parse_asm_operands(token
, stmt
, &stmt
->asm_outputs
);
2101 if (match_op(token
, ':'))
2102 token
= parse_asm_operands(token
, stmt
, &stmt
->asm_inputs
);
2103 if (match_op(token
, ':'))
2104 token
= parse_asm_clobbers(token
, stmt
, &stmt
->asm_clobbers
);
2105 if (match_op(token
, ':') && (mods
& MOD_ASM_GOTO
))
2106 token
= parse_asm_labels(token
, stmt
, &stmt
->asm_labels
);
2107 token
= expect(token
, ')', "after asm");
2108 return expect(token
, ';', "at end of asm-statement");
2111 static struct token
*parse_static_assert(struct token
*token
, struct symbol_list
**unused
)
2113 struct expression
*cond
= NULL
, *message
= NULL
;
2115 token
= expect(token
->next
, '(', "after _Static_assert");
2116 token
= constant_expression(token
, &cond
);
2118 sparse_error(token
->pos
, "Expected constant expression");
2119 if (match_op(token
, ',')) {
2120 token
= token
->next
;
2121 token
= string_expression(token
, &message
, "_Static_assert()");
2125 token
= expect(token
, ')', "after diagnostic message in _Static_assert");
2126 token
= expect(token
, ';', "after _Static_assert()");
2128 if (cond
&& !const_expression_value(cond
) && cond
->type
== EXPR_VALUE
) {
2129 const char *sep
= "", *msg
= "";
2133 msg
= show_string(message
->string
);
2135 sparse_error(cond
->pos
, "static assertion failed%s%s", sep
, msg
);
2141 static struct token
*ignore_seg_gs(struct token
*token
, struct symbol_list
**unused
)
2146 /* Make a statement out of an expression */
2147 static struct statement
*make_statement(struct expression
*expr
)
2149 struct statement
*stmt
;
2153 stmt
= alloc_statement(expr
->pos
, STMT_EXPRESSION
);
2154 stmt
->expression
= expr
;
2159 * All iterators have two symbols associated with them:
2160 * the "continue" and "break" symbols, which are targets
2161 * for continue and break statements respectively.
2163 * They are in a special name-space, but they follow
2164 * all the normal visibility rules, so nested iterators
2165 * automatically work right.
2167 static void start_iterator(struct statement
*stmt
)
2169 struct symbol
*cont
, *brk
;
2171 start_block_scope(stmt
->pos
);
2172 cont
= alloc_symbol(stmt
->pos
, SYM_NODE
);
2173 bind_symbol(cont
, &continue_ident
, NS_ITERATOR
);
2174 brk
= alloc_symbol(stmt
->pos
, SYM_NODE
);
2175 bind_symbol(brk
, &break_ident
, NS_ITERATOR
);
2177 stmt
->type
= STMT_ITERATOR
;
2178 stmt
->iterator_break
= brk
;
2179 stmt
->iterator_continue
= cont
;
2180 fn_local_symbol(brk
);
2181 fn_local_symbol(cont
);
2184 static void end_iterator(struct statement
*stmt
)
2189 static struct statement
*start_function(struct symbol
*sym
)
2192 struct statement
*stmt
= alloc_statement(sym
->pos
, STMT_COMPOUND
);
2194 start_function_scope(sym
->pos
);
2195 ret
= alloc_symbol(sym
->pos
, SYM_NODE
);
2196 ret
->ctype
= sym
->ctype
.base_type
->ctype
;
2197 ret
->ctype
.modifiers
&= ~(MOD_STORAGE
| MOD_QUALIFIER
| MOD_TLS
| MOD_ACCESS
| MOD_NOCAST
| MOD_NODEREF
);
2198 ret
->ctype
.modifiers
|= (MOD_AUTO
| MOD_REGISTER
);
2199 bind_symbol(ret
, &return_ident
, NS_ITERATOR
);
2201 fn_local_symbol(ret
);
2203 // Currently parsed symbol for __func__/__FUNCTION__/__PRETTY_FUNCTION__
2209 static void end_function(struct symbol
*sym
)
2212 end_function_scope();
2216 * A "switch()" statement, like an iterator, has a
2217 * the "break" symbol associated with it. It works
2218 * exactly like the iterator break - it's the target
2219 * for any break-statements in scope, and means that
2220 * "break" handling doesn't even need to know whether
2221 * it's breaking out of an iterator or a switch.
2223 * In addition, the "case" symbol is a marker for the
2224 * case/default statements to find the switch statement
2225 * that they are associated with.
2227 static void start_switch(struct statement
*stmt
)
2229 struct symbol
*brk
, *switch_case
;
2231 start_block_scope(stmt
->pos
);
2232 brk
= alloc_symbol(stmt
->pos
, SYM_NODE
);
2233 bind_symbol(brk
, &break_ident
, NS_ITERATOR
);
2235 switch_case
= alloc_symbol(stmt
->pos
, SYM_NODE
);
2236 bind_symbol(switch_case
, &case_ident
, NS_ITERATOR
);
2237 switch_case
->stmt
= stmt
;
2239 stmt
->type
= STMT_SWITCH
;
2240 stmt
->switch_break
= brk
;
2241 stmt
->switch_case
= switch_case
;
2243 fn_local_symbol(brk
);
2244 fn_local_symbol(switch_case
);
2247 static void end_switch(struct statement
*stmt
)
2249 if (!stmt
->switch_case
->symbol_list
)
2250 warning(stmt
->pos
, "switch with no cases");
2254 static void add_case_statement(struct statement
*stmt
)
2256 struct symbol
*target
= lookup_symbol(&case_ident
, NS_ITERATOR
);
2260 sparse_error(stmt
->pos
, "not in switch scope");
2261 stmt
->type
= STMT_NONE
;
2264 sym
= alloc_symbol(stmt
->pos
, SYM_NODE
);
2265 add_symbol(&target
->symbol_list
, sym
);
2267 stmt
->case_label
= sym
;
2268 fn_local_symbol(sym
);
2271 static struct token
*parse_return_statement(struct token
*token
, struct statement
*stmt
)
2273 struct symbol
*target
= lookup_symbol(&return_ident
, NS_ITERATOR
);
2276 error_die(token
->pos
, "internal error: return without a function target");
2277 stmt
->type
= STMT_RETURN
;
2278 stmt
->ret_target
= target
;
2279 return expression_statement(token
->next
, &stmt
->ret_value
);
2282 static void validate_for_loop_decl(struct symbol
*sym
)
2284 unsigned long storage
= sym
->ctype
.modifiers
& MOD_STORAGE
;
2286 if (storage
& ~(MOD_AUTO
| MOD_REGISTER
)) {
2287 const char *name
= show_ident(sym
->ident
);
2288 sparse_error(sym
->pos
, "non-local var '%s' in for-loop initializer", name
);
2289 sym
->ctype
.modifiers
&= ~MOD_STORAGE
;
2293 static struct token
*parse_for_statement(struct token
*token
, struct statement
*stmt
)
2295 struct symbol_list
*syms
;
2296 struct expression
*e1
, *e2
, *e3
;
2297 struct statement
*iterator
;
2299 start_iterator(stmt
);
2300 token
= expect(token
->next
, '(', "after 'for'");
2304 /* C99 variable declaration? */
2305 if (lookup_type(token
)) {
2306 token
= external_declaration(token
, &syms
, validate_for_loop_decl
);
2308 token
= parse_expression(token
, &e1
);
2309 token
= expect(token
, ';', "in 'for'");
2311 token
= parse_expression(token
, &e2
);
2312 token
= expect(token
, ';', "in 'for'");
2313 token
= parse_expression(token
, &e3
);
2314 token
= expect(token
, ')', "in 'for'");
2315 token
= statement(token
, &iterator
);
2317 stmt
->iterator_syms
= syms
;
2318 stmt
->iterator_pre_statement
= make_statement(e1
);
2319 stmt
->iterator_pre_condition
= e2
;
2320 stmt
->iterator_post_statement
= make_statement(e3
);
2321 stmt
->iterator_post_condition
= NULL
;
2322 stmt
->iterator_statement
= iterator
;
2328 static struct token
*parse_while_statement(struct token
*token
, struct statement
*stmt
)
2330 struct expression
*expr
;
2331 struct statement
*iterator
;
2333 start_iterator(stmt
);
2334 token
= parens_expression(token
->next
, &expr
, "after 'while'");
2335 token
= statement(token
, &iterator
);
2337 stmt
->iterator_pre_condition
= expr
;
2338 stmt
->iterator_post_condition
= NULL
;
2339 stmt
->iterator_statement
= iterator
;
2345 static struct token
*parse_do_statement(struct token
*token
, struct statement
*stmt
)
2347 struct expression
*expr
;
2348 struct statement
*iterator
;
2350 start_iterator(stmt
);
2351 token
= statement(token
->next
, &iterator
);
2352 if (token_type(token
) == TOKEN_IDENT
&& token
->ident
== &while_ident
)
2353 token
= token
->next
;
2355 sparse_error(token
->pos
, "expected 'while' after 'do'");
2356 token
= parens_expression(token
, &expr
, "after 'do-while'");
2358 stmt
->iterator_post_condition
= expr
;
2359 stmt
->iterator_statement
= iterator
;
2362 if (iterator
&& iterator
->type
!= STMT_COMPOUND
&& Wdo_while
)
2363 warning(iterator
->pos
, "do-while statement is not a compound statement");
2365 return expect(token
, ';', "after statement");
2368 static struct token
*parse_if_statement(struct token
*token
, struct statement
*stmt
)
2370 stmt
->type
= STMT_IF
;
2371 token
= parens_expression(token
->next
, &stmt
->if_conditional
, "after if");
2372 token
= statement(token
, &stmt
->if_true
);
2373 if (token_type(token
) != TOKEN_IDENT
)
2375 if (token
->ident
!= &else_ident
)
2377 return statement(token
->next
, &stmt
->if_false
);
2380 static inline struct token
*case_statement(struct token
*token
, struct statement
*stmt
)
2382 stmt
->type
= STMT_CASE
;
2383 token
= expect(token
, ':', "after default/case");
2384 add_case_statement(stmt
);
2385 if (match_op(token
, '}')) {
2386 warning(token
->pos
, "statement expected after case label");
2387 stmt
->case_statement
= alloc_statement(token
->pos
, STMT_NONE
);
2390 return statement(token
, &stmt
->case_statement
);
2393 static struct token
*parse_case_statement(struct token
*token
, struct statement
*stmt
)
2395 token
= parse_expression(token
->next
, &stmt
->case_expression
);
2396 if (match_op(token
, SPECIAL_ELLIPSIS
))
2397 token
= parse_expression(token
->next
, &stmt
->case_to
);
2398 return case_statement(token
, stmt
);
2401 static struct token
*parse_default_statement(struct token
*token
, struct statement
*stmt
)
2403 return case_statement(token
->next
, stmt
);
2406 static struct token
*parse_loop_iterator(struct token
*token
, struct statement
*stmt
)
2408 struct symbol
*target
= lookup_symbol(token
->ident
, NS_ITERATOR
);
2409 stmt
->type
= STMT_GOTO
;
2410 stmt
->goto_label
= target
;
2412 sparse_error(stmt
->pos
, "break/continue not in iterator scope");
2413 return expect(token
->next
, ';', "at end of statement");
2416 static struct token
*parse_switch_statement(struct token
*token
, struct statement
*stmt
)
2418 stmt
->type
= STMT_SWITCH
;
2420 token
= parens_expression(token
->next
, &stmt
->switch_expression
, "after 'switch'");
2421 token
= statement(token
, &stmt
->switch_statement
);
2426 static void warn_label_usage(struct position def
, struct position use
, struct ident
*ident
)
2428 const char *id
= show_ident(ident
);
2429 sparse_error(use
, "label '%s' used outside statement expression", id
);
2430 info(def
, " label '%s' defined here", id
);
2431 current_fn
->bogus_linear
= 1;
2434 void check_label_usage(struct symbol
*label
, struct position use_pos
)
2436 struct statement
*def
= label
->stmt
;
2439 if (!is_in_scope(def
->label_scope
, label_scope
))
2440 warn_label_usage(def
->pos
, use_pos
, label
->ident
);
2441 } else if (!label
->label_scope
) {
2442 label
->label_scope
= label_scope
;
2443 label
->label_pos
= use_pos
;
2447 static struct token
*parse_goto_statement(struct token
*token
, struct statement
*stmt
)
2449 stmt
->type
= STMT_GOTO
;
2450 token
= token
->next
;
2451 if (match_op(token
, '*')) {
2452 token
= parse_expression(token
->next
, &stmt
->goto_expression
);
2453 add_statement(&function_computed_goto_list
, stmt
);
2454 } else if (token_type(token
) == TOKEN_IDENT
) {
2455 struct symbol
*label
= label_symbol(token
, 1);
2456 stmt
->goto_label
= label
;
2457 check_label_usage(label
, stmt
->pos
);
2458 token
= token
->next
;
2460 sparse_error(token
->pos
, "Expected identifier or goto expression");
2462 return expect(token
, ';', "at end of statement");
2465 static struct token
*parse_context_statement(struct token
*token
, struct statement
*stmt
)
2467 stmt
->type
= STMT_CONTEXT
;
2468 token
= token
->next
;
2469 token
= expect(token
, '(', "after __context__ statement");
2470 token
= assignment_expression(token
, &stmt
->expression
);
2471 if (!stmt
->expression
)
2472 unexpected(token
, "expression expected after '('");
2473 if (match_op(token
, ',')) {
2474 token
= token
->next
;
2475 stmt
->context
= stmt
->expression
;
2476 token
= assignment_expression(token
, &stmt
->expression
);
2477 if (!stmt
->expression
)
2478 unexpected(token
, "expression expected after ','");
2480 token
= expect(token
, ')', "at end of __context__ statement");
2481 return expect(token
, ';', "at end of statement");
2484 static struct token
*parse_range_statement(struct token
*token
, struct statement
*stmt
)
2486 stmt
->type
= STMT_RANGE
;
2487 token
= token
->next
;
2488 token
= expect(token
, '(', "after __range__ statement");
2489 token
= assignment_expression(token
, &stmt
->range_expression
);
2490 token
= expect(token
, ',', "after range expression");
2491 token
= assignment_expression(token
, &stmt
->range_low
);
2492 token
= expect(token
, ',', "after low range");
2493 token
= assignment_expression(token
, &stmt
->range_high
);
2494 token
= expect(token
, ')', "after range statement");
2495 return expect(token
, ';', "after range statement");
2498 static struct token
*handle_label_attributes(struct token
*token
, struct symbol
*label
)
2500 struct decl_state ctx
= { };
2502 token
= handle_attributes(token
, &ctx
);
2503 label
->label_modifiers
= ctx
.ctype
.modifiers
;
2507 static struct token
*statement(struct token
*token
, struct statement
**tree
)
2509 struct statement
*stmt
= alloc_statement(token
->pos
, STMT_NONE
);
2512 if (token_type(token
) == TOKEN_IDENT
) {
2513 struct symbol
*s
= lookup_keyword(token
->ident
, NS_KEYWORD
);
2514 if (s
&& s
->op
->statement
)
2515 return s
->op
->statement(token
, stmt
);
2517 if (match_op(token
->next
, ':')) {
2518 struct symbol
*s
= label_symbol(token
, 0);
2519 token
= handle_label_attributes(token
->next
->next
, s
);
2521 sparse_error(stmt
->pos
, "label '%s' redefined", show_ident(s
->ident
));
2522 // skip the label to avoid multiple definitions
2523 return statement(token
, tree
);
2525 stmt
->type
= STMT_LABEL
;
2526 stmt
->label_identifier
= s
;
2527 stmt
->label_scope
= label_scope
;
2528 if (s
->label_scope
) {
2529 if (!is_in_scope(label_scope
, s
->label_scope
))
2530 warn_label_usage(stmt
->pos
, s
->label_pos
, s
->ident
);
2533 if (match_op(token
, '}')) {
2534 warning(token
->pos
, "statement expected after label");
2535 stmt
->label_statement
= alloc_statement(token
->pos
, STMT_NONE
);
2538 return statement(token
, &stmt
->label_statement
);
2542 if (match_op(token
, '{')) {
2543 token
= compound_statement(token
->next
, stmt
);
2544 return expect(token
, '}', "at end of compound statement");
2547 stmt
->type
= STMT_EXPRESSION
;
2548 return expression_statement(token
, &stmt
->expression
);
2551 /* gcc extension - __label__ ident-list; in the beginning of compound stmt */
2552 static struct token
*label_statement(struct token
*token
)
2554 while (token_type(token
) == TOKEN_IDENT
) {
2555 struct symbol
*sym
= alloc_symbol(token
->pos
, SYM_LABEL
);
2556 /* it's block-scope, but we want label namespace */
2557 bind_symbol_with_scope(sym
, token
->ident
, NS_LABEL
, block_scope
);
2558 fn_local_symbol(sym
);
2559 token
= token
->next
;
2560 if (!match_op(token
, ','))
2562 token
= token
->next
;
2564 return expect(token
, ';', "at end of label declaration");
2567 static struct token
* statement_list(struct token
*token
, struct statement_list
**list
)
2569 int seen_statement
= 0;
2570 while (token_type(token
) == TOKEN_IDENT
&&
2571 token
->ident
== &__label___ident
)
2572 token
= label_statement(token
->next
);
2574 struct statement
* stmt
;
2575 if (eof_token(token
))
2577 if (match_op(token
, '}'))
2579 if (match_ident(token
, &_Static_assert_ident
)) {
2580 token
= parse_static_assert(token
, NULL
);
2583 if (lookup_type(token
)) {
2584 if (seen_statement
) {
2585 warning(token
->pos
, "mixing declarations and code");
2588 stmt
= alloc_statement(token
->pos
, STMT_DECLARATION
);
2589 token
= external_declaration(token
, &stmt
->declaration
, NULL
);
2591 seen_statement
= Wdeclarationafterstatement
;
2592 token
= statement(token
, &stmt
);
2594 add_statement(list
, stmt
);
2599 static struct token
*identifier_list(struct token
*token
, struct symbol
*fn
)
2601 struct symbol_list
**list
= &fn
->arguments
;
2603 struct symbol
*sym
= alloc_symbol(token
->pos
, SYM_NODE
);
2604 sym
->ident
= token
->ident
;
2605 token
= token
->next
;
2606 sym
->endpos
= token
->pos
;
2607 sym
->ctype
.base_type
= &incomplete_ctype
;
2608 add_symbol(list
, sym
);
2609 if (!match_op(token
, ',') ||
2610 token_type(token
->next
) != TOKEN_IDENT
||
2611 lookup_type(token
->next
))
2613 token
= token
->next
;
2618 static struct token
*parameter_type_list(struct token
*token
, struct symbol
*fn
)
2620 struct symbol_list
**list
= &fn
->arguments
;
2625 if (match_op(token
, SPECIAL_ELLIPSIS
)) {
2627 token
= token
->next
;
2631 sym
= alloc_symbol(token
->pos
, SYM_NODE
);
2632 token
= parameter_declaration(token
, sym
);
2633 if (sym
->ctype
.base_type
== &void_ctype
) {
2634 /* Special case: (void) */
2635 if (!*list
&& !sym
->ident
)
2637 warning(token
->pos
, "void parameter");
2639 add_symbol(list
, sym
);
2640 if (!match_op(token
, ','))
2642 token
= token
->next
;
2647 struct token
*compound_statement(struct token
*token
, struct statement
*stmt
)
2649 stmt
->type
= STMT_COMPOUND
;
2650 start_block_scope(token
->pos
);
2651 token
= statement_list(token
, &stmt
->stmts
);
2656 static struct expression
*identifier_expression(struct token
*token
)
2658 struct expression
*expr
= alloc_expression(token
->pos
, EXPR_IDENTIFIER
);
2659 expr
->expr_ident
= token
->ident
;
2663 static struct expression
*index_expression(struct expression
*from
, struct expression
*to
)
2665 int idx_from
, idx_to
;
2666 struct expression
*expr
= alloc_expression(from
->pos
, EXPR_INDEX
);
2668 idx_from
= const_expression_value(from
);
2671 idx_to
= const_expression_value(to
);
2672 if (idx_to
< idx_from
|| idx_from
< 0)
2673 warning(from
->pos
, "nonsense array initializer index range");
2675 expr
->idx_from
= idx_from
;
2676 expr
->idx_to
= idx_to
;
2680 static struct token
*single_initializer(struct expression
**ep
, struct token
*token
)
2682 int expect_equal
= 0;
2683 struct token
*next
= token
->next
;
2684 struct expression
**tail
= ep
;
2689 if ((token_type(token
) == TOKEN_IDENT
) && match_op(next
, ':')) {
2690 struct expression
*expr
= identifier_expression(token
);
2691 if (Wold_initializer
)
2692 warning(token
->pos
, "obsolete struct initializer, use C99 syntax");
2693 token
= initializer(&expr
->ident_expression
, next
->next
);
2694 if (expr
->ident_expression
)
2699 for (tail
= ep
, nested
= 0; ; nested
++, next
= token
->next
) {
2700 if (match_op(token
, '.') && (token_type(next
) == TOKEN_IDENT
)) {
2701 struct expression
*expr
= identifier_expression(next
);
2703 tail
= &expr
->ident_expression
;
2706 } else if (match_op(token
, '[')) {
2707 struct expression
*from
= NULL
, *to
= NULL
, *expr
;
2708 token
= constant_expression(token
->next
, &from
);
2710 sparse_error(token
->pos
, "Expected constant expression");
2713 if (match_op(token
, SPECIAL_ELLIPSIS
))
2714 token
= constant_expression(token
->next
, &to
);
2715 expr
= index_expression(from
, to
);
2717 tail
= &expr
->idx_expression
;
2718 token
= expect(token
, ']', "at end of initializer index");
2725 if (nested
&& !expect_equal
) {
2726 if (!match_op(token
, '='))
2727 warning(token
->pos
, "obsolete array initializer, use C99 syntax");
2732 token
= expect(token
, '=', "at end of initializer index");
2734 token
= initializer(tail
, token
);
2740 static struct token
*initializer_list(struct expression_list
**list
, struct token
*token
)
2742 struct expression
*expr
;
2745 token
= single_initializer(&expr
, token
);
2748 add_expression(list
, expr
);
2749 if (!match_op(token
, ','))
2751 token
= token
->next
;
2756 struct token
*initializer(struct expression
**tree
, struct token
*token
)
2758 if (match_op(token
, '{')) {
2759 struct expression
*expr
= alloc_expression(token
->pos
, EXPR_INITIALIZER
);
2761 if (!Wuniversal_initializer
) {
2762 struct token
*next
= token
->next
;
2763 // '{ 0 }' is equivalent to '{ }' except for some
2764 // warnings, like using 0 to initialize a null-pointer.
2765 if (match_token_zero(next
)) {
2766 if (match_op(next
->next
, '}'))
2767 expr
->zero_init
= 1;
2771 token
= initializer_list(&expr
->expr_list
, token
->next
);
2772 return expect(token
, '}', "at end of initializer");
2774 return assignment_expression(token
, tree
);
2777 static void declare_argument(struct symbol
*sym
, struct symbol
*fn
)
2780 sparse_error(sym
->pos
, "no identifier for function argument");
2783 if (sym
->ctype
.base_type
== &incomplete_ctype
) {
2784 sym
->ctype
.base_type
= &int_ctype
;
2786 if (Wimplicit_int
) {
2787 sparse_error(sym
->pos
, "missing type declaration for parameter '%s'",
2788 show_ident(sym
->ident
));
2791 bind_symbol(sym
, sym
->ident
, NS_SYMBOL
);
2794 static int is_syscall(struct symbol
*sym
)
2800 macro
= get_macro_name(sym
->pos
);
2802 (strncmp("SYSCALL_DEFINE", macro
, strlen("SYSCALL_DEFINE")) == 0 ||
2803 strncmp("COMPAT_SYSCALL_DEFINE", macro
, strlen("COMPAT_SYSCALL_DEFINE")) == 0))
2806 name
= sym
->ident
->name
;
2808 if (name
&& strncmp(name
, "sys_", 4) ==0)
2811 if (name
&& strncmp(name
, "compat_sys_", 11) == 0)
2818 static struct token
*parse_function_body(struct token
*token
, struct symbol
*decl
,
2819 struct symbol_list
**list
)
2821 struct symbol_list
**old_symbol_list
;
2822 struct symbol
*base_type
= decl
->ctype
.base_type
;
2823 struct statement
*stmt
, **p
;
2824 struct symbol
*prev
;
2827 old_symbol_list
= function_symbol_list
;
2828 if (decl
->ctype
.modifiers
& MOD_INLINE
) {
2829 function_symbol_list
= &decl
->inline_symbol_list
;
2830 p
= &base_type
->inline_stmt
;
2832 function_symbol_list
= &decl
->symbol_list
;
2833 p
= &base_type
->stmt
;
2835 function_computed_target_list
= NULL
;
2836 function_computed_goto_list
= NULL
;
2838 if ((decl
->ctype
.modifiers
& (MOD_EXTERN
|MOD_INLINE
)) == MOD_EXTERN
) {
2839 if (Wexternal_function_has_definition
)
2840 warning(decl
->pos
, "function '%s' with external linkage has definition", show_ident(decl
->ident
));
2842 if (!(decl
->ctype
.modifiers
& MOD_STATIC
))
2843 decl
->ctype
.modifiers
|= MOD_EXTERN
;
2845 stmt
= start_function(decl
);
2848 FOR_EACH_PTR (base_type
->arguments
, arg
) {
2849 declare_argument(arg
, base_type
);
2850 } END_FOR_EACH_PTR(arg
);
2852 token
= statement_list(token
->next
, &stmt
->stmts
);
2855 if (!(decl
->ctype
.modifiers
& MOD_INLINE
))
2856 add_symbol(list
, decl
);
2857 else if (is_syscall(decl
)) {
2858 add_symbol(list
, decl
);
2860 printf("parse.c decl: %s\n", decl->ident->name);
2861 char *macro = get_macro_name(decl->pos);
2862 printf("decl macro: %s\n", macro);
2865 check_declaration(decl
);
2866 decl
->definition
= decl
;
2867 prev
= decl
->same_symbol
;
2868 if (prev
&& prev
->definition
) {
2869 warning(decl
->pos
, "multiple definitions for function '%s'",
2870 show_ident(decl
->ident
));
2871 info(prev
->definition
->pos
, " the previous one is here");
2874 rebind_scope(prev
, decl
->scope
);
2875 prev
->definition
= decl
;
2876 prev
= prev
->same_symbol
;
2879 function_symbol_list
= old_symbol_list
;
2880 if (function_computed_goto_list
) {
2881 if (!function_computed_target_list
)
2882 warning(decl
->pos
, "function '%s' has computed goto but no targets?", show_ident(decl
->ident
));
2884 FOR_EACH_PTR(function_computed_goto_list
, stmt
) {
2885 stmt
->target_list
= function_computed_target_list
;
2886 } END_FOR_EACH_PTR(stmt
);
2889 return expect(token
, '}', "at end of function");
2892 static void promote_k_r_types(struct symbol
*arg
)
2894 struct symbol
*base
= arg
->ctype
.base_type
;
2895 if (base
&& base
->ctype
.base_type
== &int_type
&& base
->rank
< 0) {
2896 arg
->ctype
.base_type
= &int_ctype
;
2900 static void apply_k_r_types(struct symbol_list
*argtypes
, struct symbol
*fn
)
2902 struct symbol_list
*real_args
= fn
->ctype
.base_type
->arguments
;
2905 FOR_EACH_PTR(real_args
, arg
) {
2906 struct symbol
*type
;
2908 /* This is quadratic in the number of arguments. We _really_ don't care */
2909 FOR_EACH_PTR(argtypes
, type
) {
2910 if (type
->ident
== arg
->ident
)
2912 } END_FOR_EACH_PTR(type
);
2913 if (Wimplicit_int
) {
2914 warning(arg
->pos
, "missing type declaration for parameter '%s'",
2915 show_ident(arg
->ident
));
2917 type
= alloc_symbol(arg
->pos
, SYM_NODE
);
2918 type
->ident
= arg
->ident
;
2919 type
->ctype
.base_type
= &int_ctype
;
2922 /* "char" and "short" promote to "int" */
2923 promote_k_r_types(type
);
2925 arg
->ctype
= type
->ctype
;
2926 } END_FOR_EACH_PTR(arg
);
2928 FOR_EACH_PTR(argtypes
, arg
) {
2930 warning(arg
->pos
, "nonsensical parameter declaration '%s'", show_ident(arg
->ident
));
2931 } END_FOR_EACH_PTR(arg
);
2935 static struct token
*parse_k_r_arguments(struct token
*token
, struct symbol
*decl
,
2936 struct symbol_list
**list
)
2938 struct symbol_list
*args
= NULL
;
2940 if (Wold_style_definition
)
2941 warning(token
->pos
, "non-ANSI definition of function '%s'", show_ident(decl
->ident
));
2944 token
= declaration_list(token
, &args
);
2945 if (!match_op(token
, ';')) {
2946 sparse_error(token
->pos
, "expected ';' at end of parameter declaration");
2949 token
= token
->next
;
2950 } while (lookup_type(token
));
2952 apply_k_r_types(args
, decl
);
2954 if (!match_op(token
, '{')) {
2955 sparse_error(token
->pos
, "expected function body");
2958 return parse_function_body(token
, decl
, list
);
2961 static struct token
*toplevel_asm_declaration(struct token
*token
, struct symbol_list
**list
)
2963 struct symbol
*anon
= alloc_symbol(token
->pos
, SYM_NODE
);
2964 struct symbol
*fn
= alloc_symbol(token
->pos
, SYM_FN
);
2965 struct statement
*stmt
;
2967 anon
->ctype
.base_type
= fn
;
2968 stmt
= alloc_statement(token
->pos
, STMT_NONE
);
2971 token
= parse_asm_statement(token
, stmt
);
2973 // FIXME: add_symbol(list, anon);
2977 struct token
*external_declaration(struct token
*token
, struct symbol_list
**list
,
2978 validate_decl_t validate_decl
)
2980 struct ident
*ident
= NULL
;
2981 struct symbol
*decl
;
2982 struct decl_state ctx
= { .ident
= &ident
};
2984 struct symbol
*base_type
;
2988 if (match_ident(token
, &_Pragma_ident
))
2989 return parse_underscore_Pragma(token
);
2991 /* Top-level inline asm or static assertion? */
2992 if (token_type(token
) == TOKEN_IDENT
) {
2993 struct symbol
*s
= lookup_keyword(token
->ident
, NS_KEYWORD
);
2994 if (s
&& s
->op
->toplevel
)
2995 return s
->op
->toplevel(token
, list
);
2998 /* Parse declaration-specifiers, if any */
2999 token
= declaration_specifiers(token
, &ctx
);
3000 mod
= decl_modifiers(&ctx
);
3001 decl
= alloc_symbol(token
->pos
, SYM_NODE
);
3002 /* Just a type declaration? */
3003 if (match_op(token
, ';')) {
3004 apply_modifiers(token
->pos
, &ctx
);
3009 token
= declarator(token
, &ctx
);
3010 token
= handle_asm_name(token
, &ctx
);
3011 token
= handle_attributes(token
, &ctx
);
3012 apply_modifiers(token
->pos
, &ctx
);
3014 decl
->ctype
= ctx
.ctype
;
3015 decl
->ctype
.modifiers
|= mod
;
3016 decl
->cleanup
= ctx
.cleanup
;
3017 decl
->endpos
= token
->pos
;
3019 /* Just a type declaration? */
3021 warning(token
->pos
, "missing identifier in declaration");
3022 return expect(token
, ';', "at the end of type declaration");
3025 /* type define declaration? */
3026 is_typedef
= ctx
.storage_class
== MOD_USERTYPE
;
3028 /* Typedefs don't have meaningful storage */
3030 decl
->ctype
.modifiers
|= MOD_USERTYPE
;
3032 bind_symbol(decl
, ident
, is_typedef
? NS_TYPEDEF
: NS_SYMBOL
);
3034 base_type
= decl
->ctype
.base_type
;
3037 if (base_type
&& !base_type
->ident
) {
3038 switch (base_type
->type
) {
3043 base_type
->ident
= ident
;
3049 } else if (base_type
&& base_type
->type
== SYM_FN
) {
3050 if (base_type
->ctype
.base_type
== &autotype_ctype
) {
3051 sparse_error(decl
->pos
, "'%s()' has __auto_type return type",
3052 show_ident(decl
->ident
));
3053 base_type
->ctype
.base_type
= &int_ctype
;
3055 if (base_type
->ctype
.base_type
== &incomplete_ctype
) {
3056 warning(decl
->pos
, "'%s()' has implicit return type",
3057 show_ident(decl
->ident
));
3058 base_type
->ctype
.base_type
= &int_ctype
;
3060 /* apply attributes placed after the declarator */
3061 decl
->ctype
.modifiers
|= ctx
.f_modifiers
;
3063 /* K&R argument declaration? */
3064 if (lookup_type(token
))
3065 return parse_k_r_arguments(token
, decl
, list
);
3066 if (match_op(token
, '{'))
3067 return parse_function_body(token
, decl
, list
);
3069 if (!(decl
->ctype
.modifiers
& MOD_STATIC
))
3070 decl
->ctype
.modifiers
|= MOD_EXTERN
;
3071 } else if (base_type
== &void_ctype
&& !(decl
->ctype
.modifiers
& MOD_EXTERN
)) {
3072 sparse_error(token
->pos
, "void declaration");
3074 if (base_type
== &incomplete_ctype
) {
3075 warning(decl
->pos
, "'%s' has implicit type", show_ident(decl
->ident
));
3076 decl
->ctype
.base_type
= &int_ctype
;;
3080 if (!is_typedef
&& match_op(token
, '=')) {
3081 struct token
*next
= token
->next
;
3082 token
= initializer(&decl
->initializer
, next
);
3084 sparse_error(token
->pos
, "expression expected before '%s'", show_token(token
));
3088 validate_decl(decl
);
3090 if (decl
->initializer
&& decl
->ctype
.modifiers
& MOD_EXTERN
) {
3091 warning(decl
->pos
, "symbol with external linkage has initializer");
3092 decl
->ctype
.modifiers
&= ~MOD_EXTERN
;
3095 if (!(decl
->ctype
.modifiers
& (MOD_EXTERN
| MOD_INLINE
))) {
3096 add_symbol(list
, decl
);
3097 fn_local_symbol(decl
);
3100 check_declaration(decl
);
3101 if (decl
->same_symbol
) {
3102 decl
->definition
= decl
->same_symbol
->definition
;
3103 decl
->op
= decl
->same_symbol
->op
;
3105 // TODO: handle -std=c89 --pedantic
3106 check_duplicates(decl
);
3111 const char *msg
= NULL
;
3112 if (decl
->ctype
.base_type
!= &autotype_ctype
)
3113 msg
= "on non-identifier";
3114 else if (match_op(token
, ','))
3115 msg
= "on declaration list";
3116 else if (!decl
->initializer
)
3117 msg
= "without initializer";
3118 else if (decl
->initializer
->type
== EXPR_SYMBOL
&&
3119 decl
->initializer
->symbol
== decl
)
3120 msg
= "on self-init var";
3122 sparse_error(decl
->pos
, "__auto_type %s", msg
);
3123 decl
->ctype
.base_type
= &bad_ctype
;
3127 if (!match_op(token
, ','))
3130 token
= token
->next
;
3132 decl
= alloc_symbol(token
->pos
, SYM_NODE
);
3135 token
= handle_attributes(token
, &ctx
);
3136 token
= declarator(token
, &ctx
);
3137 token
= handle_asm_name(token
, &ctx
);
3138 token
= handle_attributes(token
, &ctx
);
3139 apply_modifiers(token
->pos
, &ctx
);
3140 decl
->ctype
= ctx
.ctype
;
3141 decl
->ctype
.modifiers
|= mod
;
3142 decl
->cleanup
= ctx
.cleanup
;
3143 decl
->endpos
= token
->pos
;
3145 sparse_error(token
->pos
, "expected identifier name in type definition");
3150 decl
->ctype
.modifiers
|= MOD_USERTYPE
;
3152 bind_symbol(decl
, ident
, is_typedef
? NS_TYPEDEF
: NS_SYMBOL
);
3154 /* Function declarations are automatically extern unless specifically static */
3155 base_type
= decl
->ctype
.base_type
;
3156 if (!is_typedef
&& base_type
&& base_type
->type
== SYM_FN
) {
3157 if (!(decl
->ctype
.modifiers
& MOD_STATIC
))
3158 decl
->ctype
.modifiers
|= MOD_EXTERN
;
3161 return expect(token
, ';', "at end of declaration");