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 * Licensed under the Open Software License version 1.1
28 #include "expression.h"
31 #define warn_on_mixed (1)
33 static struct symbol_list
**function_symbol_list
;
34 struct symbol_list
*function_computed_target_list
;
35 struct statement_list
*function_computed_goto_list
;
37 static struct token
*statement(struct token
*token
, struct statement
**tree
);
38 static struct token
*handle_attributes(struct token
*token
, struct ctype
*ctype
, unsigned int keywords
);
40 static struct token
*struct_specifier(struct token
*token
, struct ctype
*ctype
);
41 static struct token
*union_specifier(struct token
*token
, struct ctype
*ctype
);
42 static struct token
*enum_specifier(struct token
*token
, struct ctype
*ctype
);
43 static struct token
*attribute_specifier(struct token
*token
, struct ctype
*ctype
);
44 static struct token
*typeof_specifier(struct token
*token
, struct ctype
*ctype
);
46 static struct token
*parse_if_statement(struct token
*token
, struct statement
*stmt
);
47 static struct token
*parse_return_statement(struct token
*token
, struct statement
*stmt
);
48 static struct token
*parse_loop_iterator(struct token
*token
, struct statement
*stmt
);
49 static struct token
*parse_default_statement(struct token
*token
, struct statement
*stmt
);
50 static struct token
*parse_case_statement(struct token
*token
, struct statement
*stmt
);
51 static struct token
*parse_switch_statement(struct token
*token
, struct statement
*stmt
);
52 static struct token
*parse_for_statement(struct token
*token
, struct statement
*stmt
);
53 static struct token
*parse_while_statement(struct token
*token
, struct statement
*stmt
);
54 static struct token
*parse_do_statement(struct token
*token
, struct statement
*stmt
);
55 static struct token
*parse_goto_statement(struct token
*token
, struct statement
*stmt
);
56 static struct token
*parse_context_statement(struct token
*token
, struct statement
*stmt
);
57 static struct token
*parse_range_statement(struct token
*token
, struct statement
*stmt
);
58 static struct token
*parse_asm_statement(struct token
*token
, struct statement
*stmt
);
59 static struct token
*toplevel_asm_declaration(struct token
*token
, struct symbol_list
**list
);
60 static struct token
*parse_asm_declarator(struct token
*token
, struct ctype
*ctype
);
63 static struct token
*attribute_packed(struct token
*token
, struct symbol
*attr
, struct ctype
*ctype
);
64 static struct token
*attribute_modifier(struct token
*token
, struct symbol
*attr
, struct ctype
*ctype
);
65 static struct token
*attribute_address_space(struct token
*token
, struct symbol
*attr
, struct ctype
*ctype
);
66 static struct token
*attribute_aligned(struct token
*token
, struct symbol
*attr
, struct ctype
*ctype
);
67 static struct token
*attribute_mode(struct token
*token
, struct symbol
*attr
, struct ctype
*ctype
);
68 static struct token
*attribute_context(struct token
*token
, struct symbol
*attr
, struct ctype
*ctype
);
69 static struct token
*attribute_transparent_union(struct token
*token
, struct symbol
*attr
, struct ctype
*ctype
);
70 static struct token
*ignore_attribute(struct token
*token
, struct symbol
*attr
, struct ctype
*ctype
);
73 static struct symbol_op modifier_op
= {
77 static struct symbol_op qualifier_op
= {
81 static struct symbol_op typeof_op
= {
83 .declarator
= typeof_specifier
,
86 static struct symbol_op attribute_op
= {
88 .declarator
= attribute_specifier
,
91 static struct symbol_op struct_op
= {
93 .declarator
= struct_specifier
,
96 static struct symbol_op union_op
= {
98 .declarator
= union_specifier
,
101 static struct symbol_op enum_op
= {
102 .type
= KW_SPECIFIER
,
103 .declarator
= enum_specifier
,
108 static struct symbol_op if_op
= {
109 .statement
= parse_if_statement
,
112 static struct symbol_op return_op
= {
113 .statement
= parse_return_statement
,
116 static struct symbol_op loop_iter_op
= {
117 .statement
= parse_loop_iterator
,
120 static struct symbol_op default_op
= {
121 .statement
= parse_default_statement
,
124 static struct symbol_op case_op
= {
125 .statement
= parse_case_statement
,
128 static struct symbol_op switch_op
= {
129 .statement
= parse_switch_statement
,
132 static struct symbol_op for_op
= {
133 .statement
= parse_for_statement
,
136 static struct symbol_op while_op
= {
137 .statement
= parse_while_statement
,
140 static struct symbol_op do_op
= {
141 .statement
= parse_do_statement
,
144 static struct symbol_op goto_op
= {
145 .statement
= parse_goto_statement
,
148 static struct symbol_op __context___op
= {
149 .statement
= parse_context_statement
,
152 static struct symbol_op range_op
= {
153 .statement
= parse_range_statement
,
156 static struct symbol_op asm_op
= {
158 .declarator
= parse_asm_declarator
,
159 .statement
= parse_asm_statement
,
160 .toplevel
= toplevel_asm_declaration
,
163 static struct symbol_op packed_op
= {
164 .attribute
= attribute_packed
,
167 static struct symbol_op aligned_op
= {
168 .attribute
= attribute_aligned
,
171 static struct symbol_op attr_mod_op
= {
172 .attribute
= attribute_modifier
,
175 static struct symbol_op address_space_op
= {
176 .attribute
= attribute_address_space
,
179 static struct symbol_op mode_op
= {
180 .attribute
= attribute_mode
,
183 static struct symbol_op context_op
= {
184 .attribute
= attribute_context
,
187 static struct symbol_op transparent_union_op
= {
188 .attribute
= attribute_transparent_union
,
191 static struct symbol_op ignore_attr_op
= {
192 .attribute
= ignore_attribute
,
195 static struct symbol_op mode_spec_op
= {
199 static struct init_keyword
{
202 unsigned long modifiers
;
203 struct symbol_op
*op
;
204 } keyword_table
[] = {
205 /* Type qualifiers */
206 { "const", NS_TYPEDEF
, MOD_CONST
, .op
= &qualifier_op
},
207 { "__const", NS_TYPEDEF
, MOD_CONST
, .op
= &qualifier_op
},
208 { "__const__", NS_TYPEDEF
, MOD_CONST
, .op
= &qualifier_op
},
209 { "volatile", NS_TYPEDEF
, MOD_VOLATILE
, .op
= &qualifier_op
},
210 { "__volatile", NS_TYPEDEF
, MOD_VOLATILE
, .op
= &qualifier_op
},
211 { "__volatile__", NS_TYPEDEF
, MOD_VOLATILE
, .op
= &qualifier_op
},
214 { "typedef", NS_TYPEDEF
, MOD_TYPEDEF
, .op
= &modifier_op
},
217 { "typeof", NS_TYPEDEF
, .op
= &typeof_op
},
218 { "__typeof", NS_TYPEDEF
, .op
= &typeof_op
},
219 { "__typeof__", NS_TYPEDEF
, .op
= &typeof_op
},
221 { "__attribute", NS_TYPEDEF
, .op
= &attribute_op
},
222 { "__attribute__", NS_TYPEDEF
, .op
= &attribute_op
},
224 { "struct", NS_TYPEDEF
, .op
= &struct_op
},
225 { "union", NS_TYPEDEF
, .op
= &union_op
},
226 { "enum", NS_TYPEDEF
, .op
= &enum_op
},
228 { "inline", NS_TYPEDEF
, MOD_INLINE
, .op
= &modifier_op
},
229 { "__inline", NS_TYPEDEF
, MOD_INLINE
, .op
= &modifier_op
},
230 { "__inline__", NS_TYPEDEF
, MOD_INLINE
, .op
= &modifier_op
},
232 /* Ignored for now.. */
233 { "restrict", NS_TYPEDEF
, .op
= &qualifier_op
},
234 { "__restrict", NS_TYPEDEF
, .op
= &qualifier_op
},
237 { "if", NS_KEYWORD
, .op
= &if_op
},
238 { "return", NS_KEYWORD
, .op
= &return_op
},
239 { "break", NS_KEYWORD
, .op
= &loop_iter_op
},
240 { "continue", NS_KEYWORD
, .op
= &loop_iter_op
},
241 { "default", NS_KEYWORD
, .op
= &default_op
},
242 { "case", NS_KEYWORD
, .op
= &case_op
},
243 { "switch", NS_KEYWORD
, .op
= &switch_op
},
244 { "for", NS_KEYWORD
, .op
= &for_op
},
245 { "while", NS_KEYWORD
, .op
= &while_op
},
246 { "do", NS_KEYWORD
, .op
= &do_op
},
247 { "goto", NS_KEYWORD
, .op
= &goto_op
},
248 { "__context__",NS_KEYWORD
, .op
= &__context___op
},
249 { "__range__", NS_KEYWORD
, .op
= &range_op
},
250 { "asm", NS_KEYWORD
, .op
= &asm_op
},
251 { "__asm", NS_KEYWORD
, .op
= &asm_op
},
252 { "__asm__", NS_KEYWORD
, .op
= &asm_op
},
255 { "packed", NS_KEYWORD
, .op
= &packed_op
},
256 { "__packed__", NS_KEYWORD
, .op
= &packed_op
},
257 { "aligned", NS_KEYWORD
, .op
= &aligned_op
},
258 { "__aligned__",NS_KEYWORD
, .op
= &aligned_op
},
259 { "nocast", NS_KEYWORD
, MOD_NOCAST
, .op
= &attr_mod_op
},
260 { "noderef", NS_KEYWORD
, MOD_NODEREF
, .op
= &attr_mod_op
},
261 { "safe", NS_KEYWORD
, MOD_SAFE
, .op
= &attr_mod_op
},
262 { "force", NS_KEYWORD
, MOD_FORCE
, .op
= &attr_mod_op
},
263 { "bitwise", NS_KEYWORD
, MOD_BITWISE
, .op
= &attr_mod_op
},
264 { "__bitwise__",NS_KEYWORD
, MOD_BITWISE
, .op
= &attr_mod_op
},
265 { "address_space",NS_KEYWORD
, .op
= &address_space_op
},
266 { "mode", NS_KEYWORD
, .op
= &mode_op
},
267 { "context", NS_KEYWORD
, .op
= &context_op
},
268 { "__transparent_union__", NS_KEYWORD
, .op
= &transparent_union_op
},
270 { "__mode__", NS_KEYWORD
, .op
= &mode_op
},
271 { "QI", NS_KEYWORD
, MOD_CHAR
, .op
= &mode_spec_op
},
272 { "__QI__", NS_KEYWORD
, MOD_CHAR
, .op
= &mode_spec_op
},
273 { "HI", NS_KEYWORD
, MOD_SHORT
, .op
= &mode_spec_op
},
274 { "__HI__", NS_KEYWORD
, MOD_SHORT
, .op
= &mode_spec_op
},
275 { "SI", NS_KEYWORD
, .op
= &mode_spec_op
},
276 { "__SI__", NS_KEYWORD
, .op
= &mode_spec_op
},
277 { "DI", NS_KEYWORD
, MOD_LONGLONG
, .op
= &mode_spec_op
},
278 { "__DI__", NS_KEYWORD
, MOD_LONGLONG
, .op
= &mode_spec_op
},
279 { "word", NS_KEYWORD
, MOD_LONG
, .op
= &mode_spec_op
},
280 { "__word__", NS_KEYWORD
, MOD_LONG
, .op
= &mode_spec_op
},
282 /* Ignored attributes */
283 { "nothrow", NS_KEYWORD
, .op
= &ignore_attr_op
},
284 { "__nothrow", NS_KEYWORD
, .op
= &ignore_attr_op
},
285 { "__nothrow__", NS_KEYWORD
, .op
= &ignore_attr_op
},
286 { "__malloc__", NS_KEYWORD
, .op
= &ignore_attr_op
},
287 { "nonnull", NS_KEYWORD
, .op
= &ignore_attr_op
},
288 { "__nonnull", NS_KEYWORD
, .op
= &ignore_attr_op
},
289 { "__nonnull__", NS_KEYWORD
, .op
= &ignore_attr_op
},
290 { "format", NS_KEYWORD
, .op
= &ignore_attr_op
},
291 { "__format__", NS_KEYWORD
, .op
= &ignore_attr_op
},
292 { "format_arg", NS_KEYWORD
, .op
= &ignore_attr_op
},
293 { "__format_arg__", NS_KEYWORD
, .op
= &ignore_attr_op
},
294 { "section", NS_KEYWORD
, .op
= &ignore_attr_op
},
295 { "__section__",NS_KEYWORD
, .op
= &ignore_attr_op
},
296 { "unused", NS_KEYWORD
, .op
= &ignore_attr_op
},
297 { "__unused__", NS_KEYWORD
, .op
= &ignore_attr_op
},
298 { "const", NS_KEYWORD
, .op
= &ignore_attr_op
},
299 { "__const", NS_KEYWORD
, .op
= &ignore_attr_op
},
300 { "__const__", NS_KEYWORD
, .op
= &ignore_attr_op
},
301 { "noreturn", NS_KEYWORD
, .op
= &ignore_attr_op
},
302 { "__noreturn__", NS_KEYWORD
, .op
= &ignore_attr_op
},
303 { "no_instrument_function", NS_KEYWORD
, .op
= &ignore_attr_op
},
304 { "__no_instrument_function__", NS_KEYWORD
, .op
= &ignore_attr_op
},
305 { "sentinel", NS_KEYWORD
, .op
= &ignore_attr_op
},
306 { "__sentinel__", NS_KEYWORD
, .op
= &ignore_attr_op
},
307 { "regparm", NS_KEYWORD
, .op
= &ignore_attr_op
},
308 { "__regparm__", NS_KEYWORD
, .op
= &ignore_attr_op
},
309 { "weak", NS_KEYWORD
, .op
= &ignore_attr_op
},
310 { "__weak__", NS_KEYWORD
, .op
= &ignore_attr_op
},
311 { "alias", NS_KEYWORD
, .op
= &ignore_attr_op
},
312 { "__alias__", NS_KEYWORD
, .op
= &ignore_attr_op
},
313 { "pure", NS_KEYWORD
, .op
= &ignore_attr_op
},
314 { "__pure__", NS_KEYWORD
, .op
= &ignore_attr_op
},
315 { "always_inline", NS_KEYWORD
, .op
= &ignore_attr_op
},
316 { "__always_inline__", NS_KEYWORD
, .op
= &ignore_attr_op
},
317 { "syscall_linkage", NS_KEYWORD
, .op
= &ignore_attr_op
},
318 { "__syscall_linkage__", NS_KEYWORD
, .op
= &ignore_attr_op
},
319 { "visibility", NS_KEYWORD
, .op
= &ignore_attr_op
},
320 { "__visibility__", NS_KEYWORD
, .op
= &ignore_attr_op
},
321 { "deprecated", NS_KEYWORD
, .op
= &ignore_attr_op
},
322 { "__deprecated__", NS_KEYWORD
, .op
= &ignore_attr_op
},
323 { "noinline", NS_KEYWORD
, .op
= &ignore_attr_op
},
324 { "__noinline__", NS_KEYWORD
, .op
= &ignore_attr_op
},
325 { "used", NS_KEYWORD
, .op
= &ignore_attr_op
},
326 { "__used__", NS_KEYWORD
, .op
= &ignore_attr_op
},
327 { "warn_unused_result", NS_KEYWORD
, .op
= &ignore_attr_op
},
328 { "__warn_unused_result__", NS_KEYWORD
, .op
= &ignore_attr_op
},
329 { "model", NS_KEYWORD
, .op
= &ignore_attr_op
},
330 { "__model__", NS_KEYWORD
, .op
= &ignore_attr_op
},
331 { "cdecl", NS_KEYWORD
, .op
= &ignore_attr_op
},
332 { "__cdecl__", NS_KEYWORD
, .op
= &ignore_attr_op
},
333 { "stdcall", NS_KEYWORD
, .op
= &ignore_attr_op
},
334 { "__stdcall__", NS_KEYWORD
, .op
= &ignore_attr_op
},
335 { "fastcall", NS_KEYWORD
, .op
= &ignore_attr_op
},
336 { "__fastcall__", NS_KEYWORD
, .op
= &ignore_attr_op
},
337 { "dllimport", NS_KEYWORD
, .op
= &ignore_attr_op
},
338 { "__dllimport__", NS_KEYWORD
, .op
= &ignore_attr_op
},
339 { "dllexport", NS_KEYWORD
, .op
= &ignore_attr_op
},
340 { "__dllexport__", NS_KEYWORD
, .op
= &ignore_attr_op
},
341 { "constructor", NS_KEYWORD
, .op
= &ignore_attr_op
},
342 { "__constructor__", NS_KEYWORD
, .op
= &ignore_attr_op
},
343 { "destructor", NS_KEYWORD
, .op
= &ignore_attr_op
},
344 { "__destructor__", NS_KEYWORD
, .op
= &ignore_attr_op
},
347 void init_parser(int stream
)
350 for (i
= 0; i
< sizeof keyword_table
/sizeof keyword_table
[0]; i
++) {
351 struct init_keyword
*ptr
= keyword_table
+ i
;
352 struct symbol
*sym
= create_symbol(stream
, ptr
->name
, SYM_KEYWORD
, ptr
->ns
);
353 sym
->ident
->keyword
= 1;
354 sym
->ctype
.modifiers
= ptr
->modifiers
;
359 // Add a symbol to the list of function-local symbols
360 static void fn_local_symbol(struct symbol
*sym
)
362 if (function_symbol_list
)
363 add_symbol(function_symbol_list
, sym
);
366 static int SENTINEL_ATTR
match_idents(struct token
*token
, ...)
370 if (token_type(token
) != TOKEN_IDENT
)
373 va_start(args
, token
);
375 struct ident
* next
= va_arg(args
, struct ident
*);
378 if (token
->ident
== next
)
384 struct statement
*alloc_statement(struct position pos
, int type
)
386 struct statement
*stmt
= __alloc_statement(0);
392 static struct token
*struct_declaration_list(struct token
*token
, struct symbol_list
**list
);
394 static int apply_modifiers(struct position pos
, struct ctype
*ctype
)
398 while ((base
= ctype
->base_type
)) {
399 switch (base
->type
) {
405 ctype
= &base
->ctype
;
411 /* Turn the "virtual types" into real types with real sizes etc */
412 if (ctype
->base_type
== &int_type
) {
413 ctype
->base_type
= ctype_integer(ctype
->modifiers
);
414 ctype
->modifiers
&= ~MOD_SPECIFIER
;
415 } else if (ctype
->base_type
== &fp_type
) {
416 ctype
->base_type
= ctype_fp(ctype
->modifiers
);
417 ctype
->modifiers
&= ~MOD_SPECIFIER
;
420 if (ctype
->modifiers
& MOD_BITWISE
) {
422 ctype
->modifiers
&= ~(MOD_BITWISE
| MOD_SPECIFIER
);
423 if (!is_int_type(ctype
->base_type
)) {
424 sparse_error(pos
, "invalid modifier");
427 type
= alloc_symbol(pos
, SYM_BASETYPE
);
428 *type
= *ctype
->base_type
;
429 type
->ctype
.base_type
= ctype
->base_type
;
430 type
->type
= SYM_RESTRICT
;
431 type
->ctype
.modifiers
&= ~MOD_SPECIFIER
;
432 ctype
->base_type
= type
;
438 static struct symbol
* alloc_indirect_symbol(struct position pos
, struct ctype
*ctype
, int type
)
440 struct symbol
*sym
= alloc_symbol(pos
, type
);
442 sym
->ctype
.base_type
= ctype
->base_type
;
443 sym
->ctype
.modifiers
= ctype
->modifiers
& ~MOD_STORAGE
;
445 ctype
->base_type
= sym
;
446 ctype
->modifiers
&= MOD_STORAGE
;
450 static struct symbol
*lookup_or_create_symbol(enum namespace ns
, enum type type
, struct token
*token
)
452 struct symbol
*sym
= lookup_symbol(token
->ident
, ns
);
454 sym
= alloc_symbol(token
->pos
, type
);
455 bind_symbol(sym
, token
->ident
, ns
);
456 if (type
== SYM_LABEL
)
457 fn_local_symbol(sym
);
463 * NOTE! NS_LABEL is not just a different namespace,
464 * it also ends up using function scope instead of the
465 * regular symbol scope.
467 struct symbol
*label_symbol(struct token
*token
)
469 return lookup_or_create_symbol(NS_LABEL
, SYM_LABEL
, token
);
472 static struct token
*struct_union_enum_specifier(enum type type
,
473 struct token
*token
, struct ctype
*ctype
,
474 struct token
*(*parse
)(struct token
*, struct symbol
*))
477 struct position
*repos
;
479 ctype
->modifiers
= 0;
480 token
= handle_attributes(token
, ctype
, KW_ATTRIBUTE
| KW_ASM
);
481 if (token_type(token
) == TOKEN_IDENT
) {
482 sym
= lookup_symbol(token
->ident
, NS_STRUCT
);
484 (sym
->scope
!= block_scope
&&
485 (match_op(token
->next
,';') || match_op(token
->next
,'{')))) {
486 // Either a new symbol, or else an out-of-scope
487 // symbol being redefined.
488 sym
= alloc_symbol(token
->pos
, type
);
489 bind_symbol(sym
, token
->ident
, NS_STRUCT
);
491 if (sym
->type
!= type
)
492 error_die(token
->pos
, "invalid tag applied to %s", show_typename (sym
));
493 ctype
->base_type
= sym
;
496 if (match_op(token
, '{')) {
497 // The following test is actually wrong for empty
498 // structs, but (1) they are not C99, (2) gcc does
499 // the same thing, and (3) it's easier.
500 if (sym
->symbol_list
)
501 error_die(token
->pos
, "redefinition of %s", show_typename (sym
));
503 token
= parse(token
->next
, sym
);
504 token
= expect(token
, '}', "at end of struct-union-enum-specifier");
506 // Mark the structure as needing re-examination
512 // private struct/union/enum type
513 if (!match_op(token
, '{')) {
514 sparse_error(token
->pos
, "expected declaration");
515 ctype
->base_type
= &bad_ctype
;
519 sym
= alloc_symbol(token
->pos
, type
);
520 token
= parse(token
->next
, sym
);
521 ctype
->base_type
= sym
;
522 return expect(token
, '}', "at end of specifier");
525 static struct token
*parse_struct_declaration(struct token
*token
, struct symbol
*sym
)
527 struct symbol
*field
, *last
= NULL
;
529 res
= struct_declaration_list(token
, &sym
->symbol_list
);
530 FOR_EACH_PTR(sym
->symbol_list
, field
) {
532 struct symbol
*base
= field
->ctype
.base_type
;
533 if (base
&& base
->type
== SYM_BITFIELD
)
537 last
->next_subobject
= field
;
539 } END_FOR_EACH_PTR(field
);
543 static struct token
*parse_union_declaration(struct token
*token
, struct symbol
*sym
)
545 return struct_declaration_list(token
, &sym
->symbol_list
);
548 static struct token
*struct_specifier(struct token
*token
, struct ctype
*ctype
)
550 return struct_union_enum_specifier(SYM_STRUCT
, token
, ctype
, parse_struct_declaration
);
553 static struct token
*union_specifier(struct token
*token
, struct ctype
*ctype
)
555 return struct_union_enum_specifier(SYM_UNION
, token
, ctype
, parse_union_declaration
);
561 unsigned long long y
;
564 static void upper_boundary(Num
*n
, Num
*v
)
576 static void lower_boundary(Num
*n
, Num
*v
)
588 static int type_is_ok(struct symbol
*type
, Num
*upper
, Num
*lower
)
590 int shift
= type
->bit_size
;
591 int is_unsigned
= type
->ctype
.modifiers
& MOD_UNSIGNED
;
595 if (upper
->x
== 0 && upper
->y
>> shift
)
597 if (lower
->x
== 0 || (!is_unsigned
&& (~lower
->y
>> shift
) == 0))
602 static struct symbol
*bigger_enum_type(struct symbol
*s1
, struct symbol
*s2
)
604 if (s1
->bit_size
< s2
->bit_size
) {
606 } else if (s1
->bit_size
== s2
->bit_size
) {
607 if (s2
->ctype
.modifiers
& MOD_UNSIGNED
)
610 if (s1
->bit_size
< bits_in_int
)
615 static void cast_enum_list(struct symbol_list
*list
, struct symbol
*base_type
)
619 FOR_EACH_PTR(list
, sym
) {
620 struct expression
*expr
= sym
->initializer
;
621 struct symbol
*ctype
;
622 if (expr
->type
!= EXPR_VALUE
)
625 if (ctype
->bit_size
== base_type
->bit_size
)
627 cast_value(expr
, base_type
, expr
, ctype
);
628 } END_FOR_EACH_PTR(sym
);
631 static struct token
*parse_enum_declaration(struct token
*token
, struct symbol
*parent
)
633 unsigned long long lastval
= 0;
634 struct symbol
*ctype
= NULL
, *base_type
= NULL
;
635 Num upper
= {-1, 0}, lower
= {1, 0};
636 struct symbol_list
*entries
= NULL
;
638 parent
->examined
= 1;
639 parent
->ctype
.base_type
= &int_ctype
;
640 while (token_type(token
) == TOKEN_IDENT
) {
641 struct expression
*expr
= NULL
;
642 struct token
*next
= token
->next
;
645 sym
= alloc_symbol(token
->pos
, SYM_NODE
);
646 bind_symbol(sym
, token
->ident
, NS_SYMBOL
);
647 sym
->ctype
.modifiers
&= ~MOD_ADDRESSABLE
;
649 if (match_op(next
, '=')) {
650 next
= constant_expression(next
->next
, &expr
);
651 lastval
= get_expression_value(expr
);
653 if (expr
&& expr
->ctype
)
657 } else if (is_int_type(ctype
)) {
660 error_die(token
->pos
, "can't increment the last enum member");
664 expr
= alloc_expression(token
->pos
, EXPR_VALUE
);
665 expr
->value
= lastval
;
669 sym
->initializer
= expr
;
670 sym
->ctype
.base_type
= parent
;
671 add_ptr_list(&entries
, sym
);
673 if (base_type
!= &bad_ctype
) {
674 if (ctype
->type
== SYM_NODE
)
675 ctype
= ctype
->ctype
.base_type
;
676 if (ctype
->type
== SYM_ENUM
) {
680 ctype
= ctype
->ctype
.base_type
;
684 * - if all enums are of the same type, then
685 * the base_type is that type (two first
687 * - if enums are of different types, they
688 * all have to be integer types, and the
689 * base type is at least "int_ctype".
690 * - otherwise the base_type is "bad_ctype".
694 } else if (ctype
== base_type
) {
696 } else if (is_int_type(base_type
) && is_int_type(ctype
)) {
697 base_type
= bigger_enum_type(base_type
, ctype
);
699 base_type
= &bad_ctype
;
700 parent
->ctype
.base_type
= base_type
;
702 if (is_int_type(base_type
)) {
703 Num v
= {.y
= lastval
};
704 if (ctype
->ctype
.modifiers
& MOD_UNSIGNED
)
706 else if ((long long)lastval
>= 0)
710 upper_boundary(&upper
, &v
);
711 lower_boundary(&lower
, &v
);
714 if (!match_op(token
, ','))
719 sparse_error(token
->pos
, "bad enum definition");
720 base_type
= &bad_ctype
;
722 else if (!is_int_type(base_type
))
723 base_type
= base_type
;
724 else if (type_is_ok(base_type
, &upper
, &lower
))
725 base_type
= base_type
;
726 else if (type_is_ok(&int_ctype
, &upper
, &lower
))
727 base_type
= &int_ctype
;
728 else if (type_is_ok(&uint_ctype
, &upper
, &lower
))
729 base_type
= &uint_ctype
;
730 else if (type_is_ok(&long_ctype
, &upper
, &lower
))
731 base_type
= &long_ctype
;
732 else if (type_is_ok(&ulong_ctype
, &upper
, &lower
))
733 base_type
= &ulong_ctype
;
734 else if (type_is_ok(&llong_ctype
, &upper
, &lower
))
735 base_type
= &llong_ctype
;
736 else if (type_is_ok(&ullong_ctype
, &upper
, &lower
))
737 base_type
= &ullong_ctype
;
739 base_type
= &bad_ctype
;
740 parent
->ctype
.base_type
= base_type
;
741 parent
->ctype
.modifiers
|= (base_type
->ctype
.modifiers
& MOD_UNSIGNED
);
742 parent
->examined
= 0;
744 cast_enum_list(entries
, base_type
);
745 free_ptr_list(&entries
);
750 static struct token
*enum_specifier(struct token
*token
, struct ctype
*ctype
)
752 struct token
*ret
= struct_union_enum_specifier(SYM_ENUM
, token
, ctype
, parse_enum_declaration
);
754 ctype
= &ctype
->base_type
->ctype
;
755 if (!ctype
->base_type
)
756 ctype
->base_type
= &incomplete_ctype
;
761 static struct token
*typeof_specifier(struct token
*token
, struct ctype
*ctype
)
765 if (!match_op(token
, '(')) {
766 sparse_error(token
->pos
, "expected '(' after typeof");
769 if (lookup_type(token
->next
)) {
770 token
= typename(token
->next
, &sym
);
773 struct symbol
*typeof_sym
= alloc_symbol(token
->pos
, SYM_TYPEOF
);
774 token
= parse_expression(token
->next
, &typeof_sym
->initializer
);
776 ctype
->modifiers
= 0;
777 ctype
->base_type
= typeof_sym
;
779 return expect(token
, ')', "after typeof");
782 static struct token
*ignore_attribute(struct token
*token
, struct symbol
*attr
, struct ctype
*ctype
)
784 struct expression
*expr
= NULL
;
785 if (match_op(token
, '('))
786 token
= parens_expression(token
, &expr
, "in attribute");
790 static struct token
*attribute_packed(struct token
*token
, struct symbol
*attr
, struct ctype
*ctype
)
792 ctype
->alignment
= 1;
796 static struct token
*attribute_aligned(struct token
*token
, struct symbol
*attr
, struct ctype
*ctype
)
798 int alignment
= max_alignment
;
799 struct expression
*expr
= NULL
;
801 if (match_op(token
, '(')) {
802 token
= parens_expression(token
, &expr
, "in attribute");
804 alignment
= get_expression_value(expr
);
806 ctype
->alignment
= alignment
;
810 static struct token
*attribute_modifier(struct token
*token
, struct symbol
*attr
, struct ctype
*ctype
)
812 ctype
->modifiers
|= attr
->ctype
.modifiers
;
816 static struct token
*attribute_address_space(struct token
*token
, struct symbol
*attr
, struct ctype
*ctype
)
818 struct expression
*expr
= NULL
;
819 token
= expect(token
, '(', "after address_space attribute");
820 token
= conditional_expression(token
, &expr
);
822 ctype
->as
= get_expression_value(expr
);
823 token
= expect(token
, ')', "after address_space attribute");
827 static struct token
*attribute_mode(struct token
*token
, struct symbol
*attr
, struct ctype
*ctype
)
829 token
= expect(token
, '(', "after mode attribute");
830 if (token_type(token
) == TOKEN_IDENT
) {
831 struct symbol
*mode
= lookup_keyword(token
->ident
, NS_KEYWORD
);
832 if (mode
&& mode
->op
->type
== KW_MODE
)
833 ctype
->modifiers
|= mode
->ctype
.modifiers
;
835 sparse_error(token
->pos
, "unknown mode attribute %s\n", show_ident(token
->ident
));
838 sparse_error(token
->pos
, "expect attribute mode symbol\n");
839 token
= expect(token
, ')', "after mode attribute");
843 static struct token
*attribute_context(struct token
*token
, struct symbol
*attr
, struct ctype
*ctype
)
845 struct context
*context
= alloc_context();
846 struct expression
*args
[3];
849 token
= expect(token
, '(', "after context attribute");
850 while (!match_op(token
, ')')) {
851 struct expression
*expr
= NULL
;
852 token
= conditional_expression(token
, &expr
);
857 if (!match_op(token
, ','))
864 sparse_error(token
->pos
, "expected context input/output values");
867 context
->in
= get_expression_value(args
[0]);
870 context
->in
= get_expression_value(args
[0]);
871 context
->out
= get_expression_value(args
[1]);
874 context
->context
= args
[0];
875 context
->in
= get_expression_value(args
[1]);
876 context
->out
= get_expression_value(args
[2]);
881 add_ptr_list(&ctype
->contexts
, context
);
883 token
= expect(token
, ')', "after context attribute");
887 static struct token
*attribute_transparent_union(struct token
*token
, struct symbol
*attr
, struct ctype
*ctype
)
889 if (Wtransparent_union
)
890 sparse_error(token
->pos
, "ignoring attribute __transparent_union__");
894 static struct token
*recover_unknown_attribute(struct token
*token
)
896 struct expression
*expr
= NULL
;
898 sparse_error(token
->pos
, "attribute '%s': unknown attribute", show_ident(token
->ident
));
900 if (match_op(token
, '('))
901 token
= parens_expression(token
, &expr
, "in attribute");
905 static struct token
*attribute_specifier(struct token
*token
, struct ctype
*ctype
)
907 ctype
->modifiers
= 0;
908 token
= expect(token
, '(', "after attribute");
909 token
= expect(token
, '(', "after attribute");
912 struct ident
*attribute_name
;
915 if (eof_token(token
))
917 if (match_op(token
, ';'))
919 if (token_type(token
) != TOKEN_IDENT
)
921 attribute_name
= token
->ident
;
922 attr
= lookup_keyword(attribute_name
, NS_KEYWORD
);
923 if (attr
&& attr
->op
->attribute
)
924 token
= attr
->op
->attribute(token
->next
, attr
, ctype
);
926 token
= recover_unknown_attribute(token
);
928 if (!match_op(token
, ','))
933 token
= expect(token
, ')', "after attribute");
934 token
= expect(token
, ')', "after attribute");
938 struct symbol
* ctype_integer(unsigned long spec
)
940 static struct symbol
*const integer_ctypes
[][3] = {
941 { &llong_ctype
, &sllong_ctype
, &ullong_ctype
},
942 { &long_ctype
, &slong_ctype
, &ulong_ctype
},
943 { &short_ctype
, &sshort_ctype
, &ushort_ctype
},
944 { &char_ctype
, &schar_ctype
, &uchar_ctype
},
945 { &int_ctype
, &sint_ctype
, &uint_ctype
},
947 struct symbol
*const (*ctype
)[3];
950 ctype
= integer_ctypes
;
951 if (!(spec
& MOD_LONGLONG
)) {
953 if (!(spec
& MOD_LONG
)) {
955 if (!(spec
& MOD_SHORT
)) {
957 if (!(spec
& MOD_CHAR
))
963 sub
= ((spec
& MOD_UNSIGNED
)
965 : ((spec
& MOD_EXPLICITLY_SIGNED
)
969 return ctype
[0][sub
];
972 struct symbol
* ctype_fp(unsigned long spec
)
974 if (spec
& MOD_LONGLONG
)
975 return &ldouble_ctype
;
977 return &double_ctype
;
981 static void apply_ctype(struct position pos
, struct ctype
*thistype
, struct ctype
*ctype
)
983 unsigned long mod
= thistype
->modifiers
;
986 unsigned long old
= ctype
->modifiers
;
987 unsigned long extra
= 0, dup
, conflict
;
989 if (mod
& old
& MOD_LONG
) {
990 extra
= MOD_LONGLONG
| MOD_LONG
;
994 dup
= (mod
& old
) | (extra
& old
) | (extra
& mod
);
996 sparse_error(pos
, "Just how %sdo you want this type to be?",
997 modifier_string(dup
));
999 conflict
= !(~mod
& ~old
& (MOD_LONG
| MOD_SHORT
));
1001 sparse_error(pos
, "You cannot have both long and short modifiers.");
1003 conflict
= !(~mod
& ~old
& (MOD_SIGNED
| MOD_UNSIGNED
));
1005 sparse_error(pos
, "You cannot have both signed and unsigned modifiers.");
1007 // Only one storage modifier allowed, except that "inline" doesn't count.
1008 conflict
= (mod
| old
) & (MOD_STORAGE
& ~MOD_INLINE
);
1009 conflict
&= (conflict
- 1);
1011 sparse_error(pos
, "multiple storage classes");
1013 ctype
->modifiers
= old
| mod
| extra
;
1017 concat_ptr_list((struct ptr_list
*)thistype
->contexts
,
1018 (struct ptr_list
**)&ctype
->contexts
);
1021 if (thistype
->alignment
& (thistype
->alignment
-1)) {
1022 warning(pos
, "I don't like non-power-of-2 alignments");
1023 thistype
->alignment
= 0;
1025 if (thistype
->alignment
> ctype
->alignment
)
1026 ctype
->alignment
= thistype
->alignment
;
1030 ctype
->as
= thistype
->as
;
1033 static void check_modifiers(struct position
*pos
, struct symbol
*s
, unsigned long mod
)
1035 unsigned long banned
, wrong
;
1036 const unsigned long BANNED_SIZE
= MOD_LONG
| MOD_LONGLONG
| MOD_SHORT
;
1037 const unsigned long BANNED_SIGN
= MOD_SIGNED
| MOD_UNSIGNED
;
1039 if (s
->type
== SYM_KEYWORD
)
1040 banned
= s
->op
->type
== KW_SPECIFIER
? (BANNED_SIZE
| BANNED_SIGN
) : 0;
1041 else if (s
->ctype
.base_type
== &fp_type
)
1042 banned
= BANNED_SIGN
;
1043 else if (s
->ctype
.base_type
== &int_type
|| !s
->ctype
.base_type
|| is_int_type (s
))
1049 // vector_type <-- whatever that is
1050 banned
= BANNED_SIZE
| BANNED_SIGN
;
1053 wrong
= mod
& banned
;
1055 sparse_error(*pos
, "modifier %sis invalid in this context",
1056 modifier_string (wrong
));
1059 static struct token
*declaration_specifiers(struct token
*next
, struct ctype
*ctype
, int qual
)
1061 struct token
*token
;
1063 while ( (token
= next
) != NULL
) {
1064 struct ctype thistype
;
1065 struct ident
*ident
;
1066 struct symbol
*s
, *type
;
1070 if (token_type(token
) != TOKEN_IDENT
)
1072 ident
= token
->ident
;
1074 s
= lookup_symbol(ident
, NS_TYPEDEF
);
1077 thistype
= s
->ctype
;
1078 mod
= thistype
.modifiers
;
1080 if (s
->type
!= SYM_KEYWORD
)
1082 if (!(s
->op
->type
& (KW_ATTRIBUTE
| KW_QUALIFIER
)))
1085 if (s
->type
== SYM_KEYWORD
&& s
->op
->declarator
) {
1086 next
= s
->op
->declarator(next
, &thistype
);
1087 mod
= thistype
.modifiers
;
1089 type
= thistype
.base_type
;
1093 if (ctype
->base_type
)
1095 /* User types only mix with qualifiers */
1096 if (mod
& MOD_USERTYPE
) {
1097 if (ctype
->modifiers
& MOD_SPECIFIER
)
1100 ctype
->base_type
= type
;
1103 check_modifiers(&token
->pos
, s
, ctype
->modifiers
);
1104 apply_ctype(token
->pos
, &thistype
, ctype
);
1107 if (!ctype
->base_type
) {
1108 struct symbol
*base
= &incomplete_ctype
;
1111 * If we have modifiers, we'll default to an integer
1112 * type, and "ctype_integer()" will turn this into
1115 if (ctype
->modifiers
& MOD_SPECIFIER
)
1117 ctype
->base_type
= base
;
1122 static struct token
*abstract_array_declarator(struct token
*token
, struct symbol
*sym
)
1124 struct expression
*expr
= NULL
;
1126 token
= parse_expression(token
, &expr
);
1127 sym
->array_size
= expr
;
1131 static struct token
*parameter_type_list(struct token
*, struct symbol
*, struct ident
**p
);
1132 static struct token
*declarator(struct token
*token
, struct symbol
*sym
, struct ident
**p
);
1134 static struct token
*handle_attributes(struct token
*token
, struct ctype
*ctype
, unsigned int keywords
)
1136 struct symbol
*keyword
;
1138 struct ctype thistype
= { 0, };
1139 if (token_type(token
) != TOKEN_IDENT
)
1141 keyword
= lookup_keyword(token
->ident
, NS_KEYWORD
| NS_TYPEDEF
);
1142 if (!keyword
|| keyword
->type
!= SYM_KEYWORD
)
1144 if (!(keyword
->op
->type
& keywords
))
1146 token
= keyword
->op
->declarator(token
->next
, &thistype
);
1147 apply_ctype(token
->pos
, &thistype
, ctype
);
1152 static struct token
*direct_declarator(struct token
*token
, struct symbol
*decl
, struct ident
**p
)
1154 struct ctype
*ctype
= &decl
->ctype
;
1156 if (p
&& token_type(token
) == TOKEN_IDENT
) {
1158 token
= token
->next
;
1162 token
= handle_attributes(token
, ctype
, KW_ATTRIBUTE
| KW_ASM
);
1164 if (token_type(token
) != TOKEN_SPECIAL
)
1168 * This can be either a parameter list or a grouping.
1169 * For the direct (non-abstract) case, we know if must be
1170 * a parameter list if we already saw the identifier.
1171 * For the abstract case, we know if must be a parameter
1172 * list if it is empty or starts with a type.
1174 if (token
->special
== '(') {
1176 struct token
*next
= token
->next
;
1179 next
= handle_attributes(next
, ctype
, KW_ATTRIBUTE
);
1180 fn
= (p
&& *p
) || match_op(next
, ')') || lookup_type(next
);
1183 struct symbol
*base_type
= ctype
->base_type
;
1184 token
= declarator(next
, decl
, p
);
1185 token
= expect(token
, ')', "in nested declarator");
1186 while (ctype
->base_type
!= base_type
)
1187 ctype
= &ctype
->base_type
->ctype
;
1192 sym
= alloc_indirect_symbol(token
->pos
, ctype
, SYM_FN
);
1193 token
= parameter_type_list(next
, sym
, p
);
1194 token
= expect(token
, ')', "in function declarator");
1197 if (token
->special
== '[') {
1198 struct symbol
*array
= alloc_indirect_symbol(token
->pos
, ctype
, SYM_ARRAY
);
1199 token
= abstract_array_declarator(token
->next
, array
);
1200 token
= expect(token
, ']', "in abstract_array_declarator");
1201 ctype
= &array
->ctype
;
1209 static struct token
*pointer(struct token
*token
, struct ctype
*ctype
)
1211 unsigned long modifiers
;
1212 struct symbol
*base_type
;
1214 modifiers
= ctype
->modifiers
& ~MOD_TYPEDEF
;
1215 base_type
= ctype
->base_type
;
1216 ctype
->modifiers
= modifiers
;
1218 while (match_op(token
,'*')) {
1219 struct symbol
*ptr
= alloc_symbol(token
->pos
, SYM_PTR
);
1220 ptr
->ctype
.modifiers
= modifiers
& ~MOD_STORAGE
;
1221 ptr
->ctype
.as
= ctype
->as
;
1222 concat_ptr_list((struct ptr_list
*)ctype
->contexts
,
1223 (struct ptr_list
**)&ptr
->ctype
.contexts
);
1224 ptr
->ctype
.base_type
= base_type
;
1227 ctype
->modifiers
= modifiers
& MOD_STORAGE
;
1228 ctype
->base_type
= base_type
;
1230 free_ptr_list(&ctype
->contexts
);
1232 token
= declaration_specifiers(token
->next
, ctype
, 1);
1233 modifiers
= ctype
->modifiers
;
1238 static struct token
*declarator(struct token
*token
, struct symbol
*sym
, struct ident
**p
)
1240 token
= pointer(token
, &sym
->ctype
);
1241 return direct_declarator(token
, sym
, p
);
1244 static struct token
*handle_bitfield(struct token
*token
, struct symbol
*decl
)
1246 struct ctype
*ctype
= &decl
->ctype
;
1247 struct expression
*expr
;
1248 struct symbol
*bitfield
;
1251 if (ctype
->base_type
!= &int_type
&& !is_int_type(ctype
->base_type
)) {
1252 sparse_error(token
->pos
, "invalid bitfield specifier for type %s.",
1253 show_typename(ctype
->base_type
));
1254 // Parse this to recover gracefully.
1255 return conditional_expression(token
->next
, &expr
);
1258 bitfield
= alloc_indirect_symbol(token
->pos
, ctype
, SYM_BITFIELD
);
1259 token
= conditional_expression(token
->next
, &expr
);
1260 width
= get_expression_value(expr
);
1261 bitfield
->bit_size
= width
;
1263 if (width
< 0 || width
> INT_MAX
) {
1264 sparse_error(token
->pos
, "invalid bitfield width, %lld.", width
);
1266 } else if (decl
->ident
&& width
== 0) {
1267 sparse_error(token
->pos
, "invalid named zero-width bitfield `%s'",
1268 show_ident(decl
->ident
));
1270 } else if (decl
->ident
) {
1271 struct symbol
*base_type
= bitfield
->ctype
.base_type
;
1272 struct symbol
*bitfield_type
= base_type
== &int_type
? bitfield
: base_type
;
1273 int is_signed
= !(bitfield_type
->ctype
.modifiers
& MOD_UNSIGNED
);
1274 if (Wone_bit_signed_bitfield
&& width
== 1 && is_signed
) {
1275 // Valid values are either {-1;0} or {0}, depending on integer
1276 // representation. The latter makes for very efficient code...
1277 sparse_error(token
->pos
, "dubious one-bit signed bitfield");
1279 if (Wdefault_bitfield_sign
&&
1280 bitfield_type
->type
!= SYM_ENUM
&&
1281 !(bitfield_type
->ctype
.modifiers
& MOD_EXPLICITLY_SIGNED
) &&
1283 // The sign of bitfields is unspecified by default.
1284 sparse_error(token
->pos
, "dubious bitfield without explicit `signed' or `unsigned'");
1287 bitfield
->bit_size
= width
;
1291 static struct token
*declaration_list(struct token
*token
, struct symbol_list
**list
)
1293 struct ctype ctype
= {0, };
1295 token
= declaration_specifiers(token
, &ctype
, 0);
1297 struct ident
*ident
= NULL
;
1298 struct symbol
*decl
= alloc_symbol(token
->pos
, SYM_NODE
);
1299 decl
->ctype
= ctype
;
1300 token
= declarator(token
, decl
, &ident
);
1301 decl
->ident
= ident
;
1302 if (match_op(token
, ':')) {
1303 token
= handle_bitfield(token
, decl
);
1304 token
= handle_attributes(token
, &decl
->ctype
, KW_ATTRIBUTE
| KW_ASM
);
1306 apply_modifiers(token
->pos
, &decl
->ctype
);
1307 add_symbol(list
, decl
);
1308 if (!match_op(token
, ','))
1310 token
= token
->next
;
1315 static struct token
*struct_declaration_list(struct token
*token
, struct symbol_list
**list
)
1317 while (!match_op(token
, '}')) {
1318 if (!match_op(token
, ';'))
1319 token
= declaration_list(token
, list
);
1320 if (!match_op(token
, ';')) {
1321 sparse_error(token
->pos
, "expected ; at end of declaration");
1324 token
= token
->next
;
1329 static struct token
*parameter_declaration(struct token
*token
, struct symbol
**tree
)
1331 struct ident
*ident
= NULL
;
1333 struct ctype ctype
= { 0, };
1335 token
= declaration_specifiers(token
, &ctype
, 0);
1336 sym
= alloc_symbol(token
->pos
, SYM_NODE
);
1339 token
= declarator(token
, sym
, &ident
);
1341 apply_modifiers(token
->pos
, &sym
->ctype
);
1345 struct token
*typename(struct token
*token
, struct symbol
**p
)
1347 struct symbol
*sym
= alloc_symbol(token
->pos
, SYM_NODE
);
1349 token
= declaration_specifiers(token
, &sym
->ctype
, 0);
1350 token
= declarator(token
, sym
, NULL
);
1351 apply_modifiers(token
->pos
, &sym
->ctype
);
1355 static struct token
*expression_statement(struct token
*token
, struct expression
**tree
)
1357 token
= parse_expression(token
, tree
);
1358 return expect(token
, ';', "at end of statement");
1361 static struct token
*parse_asm_operands(struct token
*token
, struct statement
*stmt
,
1362 struct expression_list
**inout
)
1364 struct expression
*expr
;
1366 /* Allow empty operands */
1367 if (match_op(token
->next
, ':') || match_op(token
->next
, ')'))
1370 struct ident
*ident
= NULL
;
1371 if (match_op(token
->next
, '[') &&
1372 token_type(token
->next
->next
) == TOKEN_IDENT
&&
1373 match_op(token
->next
->next
->next
, ']')) {
1374 ident
= token
->next
->next
->ident
;
1375 token
= token
->next
->next
->next
;
1377 add_expression(inout
, (struct expression
*)ident
); /* UGGLEE!!! */
1378 token
= primary_expression(token
->next
, &expr
);
1379 add_expression(inout
, expr
);
1380 token
= parens_expression(token
, &expr
, "in asm parameter");
1381 add_expression(inout
, expr
);
1382 } while (match_op(token
, ','));
1386 static struct token
*parse_asm_clobbers(struct token
*token
, struct statement
*stmt
,
1387 struct expression_list
**clobbers
)
1389 struct expression
*expr
;
1392 token
= primary_expression(token
->next
, &expr
);
1393 add_expression(clobbers
, expr
);
1394 } while (match_op(token
, ','));
1398 static struct token
*parse_asm_statement(struct token
*token
, struct statement
*stmt
)
1400 token
= token
->next
;
1401 stmt
->type
= STMT_ASM
;
1402 if (match_idents(token
, &__volatile___ident
, &__volatile_ident
, &volatile_ident
, NULL
)) {
1403 token
= token
->next
;
1405 token
= expect(token
, '(', "after asm");
1406 token
= parse_expression(token
, &stmt
->asm_string
);
1407 if (match_op(token
, ':'))
1408 token
= parse_asm_operands(token
, stmt
, &stmt
->asm_outputs
);
1409 if (match_op(token
, ':'))
1410 token
= parse_asm_operands(token
, stmt
, &stmt
->asm_inputs
);
1411 if (match_op(token
, ':'))
1412 token
= parse_asm_clobbers(token
, stmt
, &stmt
->asm_clobbers
);
1413 token
= expect(token
, ')', "after asm");
1414 return expect(token
, ';', "at end of asm-statement");
1417 static struct token
*parse_asm_declarator(struct token
*token
, struct ctype
*ctype
)
1419 struct expression
*expr
;
1420 token
= expect(token
, '(', "after asm");
1421 token
= parse_expression(token
->next
, &expr
);
1422 token
= expect(token
, ')', "after asm");
1426 /* Make a statement out of an expression */
1427 static struct statement
*make_statement(struct expression
*expr
)
1429 struct statement
*stmt
;
1433 stmt
= alloc_statement(expr
->pos
, STMT_EXPRESSION
);
1434 stmt
->expression
= expr
;
1439 * All iterators have two symbols associated with them:
1440 * the "continue" and "break" symbols, which are targets
1441 * for continue and break statements respectively.
1443 * They are in a special name-space, but they follow
1444 * all the normal visibility rules, so nested iterators
1445 * automatically work right.
1447 static void start_iterator(struct statement
*stmt
)
1449 struct symbol
*cont
, *brk
;
1451 start_symbol_scope();
1452 cont
= alloc_symbol(stmt
->pos
, SYM_NODE
);
1453 bind_symbol(cont
, &continue_ident
, NS_ITERATOR
);
1454 brk
= alloc_symbol(stmt
->pos
, SYM_NODE
);
1455 bind_symbol(brk
, &break_ident
, NS_ITERATOR
);
1457 stmt
->type
= STMT_ITERATOR
;
1458 stmt
->iterator_break
= brk
;
1459 stmt
->iterator_continue
= cont
;
1460 fn_local_symbol(brk
);
1461 fn_local_symbol(cont
);
1464 static void end_iterator(struct statement
*stmt
)
1469 static struct statement
*start_function(struct symbol
*sym
)
1472 struct statement
*stmt
= alloc_statement(sym
->pos
, STMT_COMPOUND
);
1474 start_function_scope();
1475 ret
= alloc_symbol(sym
->pos
, SYM_NODE
);
1476 ret
->ctype
= sym
->ctype
.base_type
->ctype
;
1477 ret
->ctype
.modifiers
&= ~(MOD_STORAGE
| MOD_CONST
| MOD_VOLATILE
| MOD_INLINE
| MOD_ADDRESSABLE
| MOD_NOCAST
| MOD_NODEREF
| MOD_ACCESSED
| MOD_TOPLEVEL
);
1478 ret
->ctype
.modifiers
|= (MOD_AUTO
| MOD_REGISTER
);
1479 bind_symbol(ret
, &return_ident
, NS_ITERATOR
);
1481 fn_local_symbol(ret
);
1483 // Currently parsed symbol for __func__/__FUNCTION__/__PRETTY_FUNCTION__
1489 static void end_function(struct symbol
*sym
)
1492 end_function_scope();
1496 * A "switch()" statement, like an iterator, has a
1497 * the "break" symbol associated with it. It works
1498 * exactly like the iterator break - it's the target
1499 * for any break-statements in scope, and means that
1500 * "break" handling doesn't even need to know whether
1501 * it's breaking out of an iterator or a switch.
1503 * In addition, the "case" symbol is a marker for the
1504 * case/default statements to find the switch statement
1505 * that they are associated with.
1507 static void start_switch(struct statement
*stmt
)
1509 struct symbol
*brk
, *switch_case
;
1511 start_symbol_scope();
1512 brk
= alloc_symbol(stmt
->pos
, SYM_NODE
);
1513 bind_symbol(brk
, &break_ident
, NS_ITERATOR
);
1515 switch_case
= alloc_symbol(stmt
->pos
, SYM_NODE
);
1516 bind_symbol(switch_case
, &case_ident
, NS_ITERATOR
);
1517 switch_case
->stmt
= stmt
;
1519 stmt
->type
= STMT_SWITCH
;
1520 stmt
->switch_break
= brk
;
1521 stmt
->switch_case
= switch_case
;
1523 fn_local_symbol(brk
);
1524 fn_local_symbol(switch_case
);
1527 static void end_switch(struct statement
*stmt
)
1529 if (!stmt
->switch_case
->symbol_list
)
1530 warning(stmt
->pos
, "switch with no cases");
1534 static void add_case_statement(struct statement
*stmt
)
1536 struct symbol
*target
= lookup_symbol(&case_ident
, NS_ITERATOR
);
1540 sparse_error(stmt
->pos
, "not in switch scope");
1541 stmt
->type
= STMT_NONE
;
1544 sym
= alloc_symbol(stmt
->pos
, SYM_NODE
);
1545 add_symbol(&target
->symbol_list
, sym
);
1547 stmt
->case_label
= sym
;
1548 fn_local_symbol(sym
);
1551 static struct token
*parse_return_statement(struct token
*token
, struct statement
*stmt
)
1553 struct symbol
*target
= lookup_symbol(&return_ident
, NS_ITERATOR
);
1556 error_die(token
->pos
, "internal error: return without a function target");
1557 stmt
->type
= STMT_RETURN
;
1558 stmt
->ret_target
= target
;
1559 return expression_statement(token
->next
, &stmt
->ret_value
);
1562 static struct token
*parse_for_statement(struct token
*token
, struct statement
*stmt
)
1564 struct symbol_list
*syms
;
1565 struct expression
*e1
, *e2
, *e3
;
1566 struct statement
*iterator
;
1568 start_iterator(stmt
);
1569 token
= expect(token
->next
, '(', "after 'for'");
1573 /* C99 variable declaration? */
1574 if (lookup_type(token
)) {
1575 token
= external_declaration(token
, &syms
);
1577 token
= parse_expression(token
, &e1
);
1578 token
= expect(token
, ';', "in 'for'");
1580 token
= parse_expression(token
, &e2
);
1581 token
= expect(token
, ';', "in 'for'");
1582 token
= parse_expression(token
, &e3
);
1583 token
= expect(token
, ')', "in 'for'");
1584 token
= statement(token
, &iterator
);
1586 stmt
->iterator_syms
= syms
;
1587 stmt
->iterator_pre_statement
= make_statement(e1
);
1588 stmt
->iterator_pre_condition
= e2
;
1589 stmt
->iterator_post_statement
= make_statement(e3
);
1590 stmt
->iterator_post_condition
= NULL
;
1591 stmt
->iterator_statement
= iterator
;
1597 static struct token
*parse_while_statement(struct token
*token
, struct statement
*stmt
)
1599 struct expression
*expr
;
1600 struct statement
*iterator
;
1602 start_iterator(stmt
);
1603 token
= parens_expression(token
->next
, &expr
, "after 'while'");
1604 token
= statement(token
, &iterator
);
1606 stmt
->iterator_pre_condition
= expr
;
1607 stmt
->iterator_post_condition
= NULL
;
1608 stmt
->iterator_statement
= iterator
;
1614 static struct token
*parse_do_statement(struct token
*token
, struct statement
*stmt
)
1616 struct expression
*expr
;
1617 struct statement
*iterator
;
1619 start_iterator(stmt
);
1620 token
= statement(token
->next
, &iterator
);
1621 if (token_type(token
) == TOKEN_IDENT
&& token
->ident
== &while_ident
)
1622 token
= token
->next
;
1624 sparse_error(token
->pos
, "expected 'while' after 'do'");
1625 token
= parens_expression(token
, &expr
, "after 'do-while'");
1627 stmt
->iterator_post_condition
= expr
;
1628 stmt
->iterator_statement
= iterator
;
1631 if (iterator
&& iterator
->type
!= STMT_COMPOUND
&& Wdo_while
)
1632 warning(iterator
->pos
, "do-while statement is not a compound statement");
1634 return expect(token
, ';', "after statement");
1637 static struct token
*parse_if_statement(struct token
*token
, struct statement
*stmt
)
1639 stmt
->type
= STMT_IF
;
1640 token
= parens_expression(token
->next
, &stmt
->if_conditional
, "after if");
1641 token
= statement(token
, &stmt
->if_true
);
1642 if (token_type(token
) != TOKEN_IDENT
)
1644 if (token
->ident
!= &else_ident
)
1646 return statement(token
->next
, &stmt
->if_false
);
1649 static inline struct token
*case_statement(struct token
*token
, struct statement
*stmt
)
1651 stmt
->type
= STMT_CASE
;
1652 token
= expect(token
, ':', "after default/case");
1653 add_case_statement(stmt
);
1654 return statement(token
, &stmt
->case_statement
);
1657 static struct token
*parse_case_statement(struct token
*token
, struct statement
*stmt
)
1659 token
= parse_expression(token
->next
, &stmt
->case_expression
);
1660 if (match_op(token
, SPECIAL_ELLIPSIS
))
1661 token
= parse_expression(token
->next
, &stmt
->case_to
);
1662 return case_statement(token
, stmt
);
1665 static struct token
*parse_default_statement(struct token
*token
, struct statement
*stmt
)
1667 return case_statement(token
->next
, stmt
);
1670 static struct token
*parse_loop_iterator(struct token
*token
, struct statement
*stmt
)
1672 struct symbol
*target
= lookup_symbol(token
->ident
, NS_ITERATOR
);
1673 stmt
->type
= STMT_GOTO
;
1674 stmt
->goto_label
= target
;
1676 sparse_error(stmt
->pos
, "break/continue not in iterator scope");
1677 return expect(token
->next
, ';', "at end of statement");
1680 static struct token
*parse_switch_statement(struct token
*token
, struct statement
*stmt
)
1682 stmt
->type
= STMT_SWITCH
;
1684 token
= parens_expression(token
->next
, &stmt
->switch_expression
, "after 'switch'");
1685 token
= statement(token
, &stmt
->switch_statement
);
1690 static struct token
*parse_goto_statement(struct token
*token
, struct statement
*stmt
)
1692 stmt
->type
= STMT_GOTO
;
1693 token
= token
->next
;
1694 if (match_op(token
, '*')) {
1695 token
= parse_expression(token
->next
, &stmt
->goto_expression
);
1696 add_statement(&function_computed_goto_list
, stmt
);
1697 } else if (token_type(token
) == TOKEN_IDENT
) {
1698 stmt
->goto_label
= label_symbol(token
);
1699 token
= token
->next
;
1701 sparse_error(token
->pos
, "Expected identifier or goto expression");
1703 return expect(token
, ';', "at end of statement");
1706 static struct token
*parse_context_statement(struct token
*token
, struct statement
*stmt
)
1708 stmt
->type
= STMT_CONTEXT
;
1709 token
= parse_expression(token
->next
, &stmt
->expression
);
1710 if(stmt
->expression
->type
== EXPR_PREOP
1711 && stmt
->expression
->op
== '('
1712 && stmt
->expression
->unop
->type
== EXPR_COMMA
) {
1713 struct expression
*expr
;
1714 expr
= stmt
->expression
->unop
;
1715 stmt
->context
= expr
->left
;
1716 stmt
->expression
= expr
->right
;
1718 return expect(token
, ';', "at end of statement");
1721 static struct token
*parse_range_statement(struct token
*token
, struct statement
*stmt
)
1723 stmt
->type
= STMT_RANGE
;
1724 token
= assignment_expression(token
->next
, &stmt
->range_expression
);
1725 token
= expect(token
, ',', "after range expression");
1726 token
= assignment_expression(token
, &stmt
->range_low
);
1727 token
= expect(token
, ',', "after low range");
1728 token
= assignment_expression(token
, &stmt
->range_high
);
1729 return expect(token
, ';', "after range statement");
1732 static struct token
*statement(struct token
*token
, struct statement
**tree
)
1734 struct statement
*stmt
= alloc_statement(token
->pos
, STMT_NONE
);
1737 if (token_type(token
) == TOKEN_IDENT
) {
1738 struct symbol
*s
= lookup_keyword(token
->ident
, NS_KEYWORD
);
1739 if (s
&& s
->op
->statement
)
1740 return s
->op
->statement(token
, stmt
);
1742 if (match_op(token
->next
, ':')) {
1743 stmt
->type
= STMT_LABEL
;
1744 stmt
->label_identifier
= label_symbol(token
);
1745 token
= handle_attributes(token
->next
->next
, &stmt
->label_identifier
->ctype
, KW_ATTRIBUTE
);
1746 return statement(token
, &stmt
->label_statement
);
1750 if (match_op(token
, '{')) {
1751 stmt
->type
= STMT_COMPOUND
;
1752 start_symbol_scope();
1753 token
= compound_statement(token
->next
, stmt
);
1756 return expect(token
, '}', "at end of compound statement");
1759 stmt
->type
= STMT_EXPRESSION
;
1760 return expression_statement(token
, &stmt
->expression
);
1763 static struct token
* statement_list(struct token
*token
, struct statement_list
**list
)
1765 int seen_statement
= 0;
1767 struct statement
* stmt
;
1768 if (eof_token(token
))
1770 if (match_op(token
, '}'))
1772 if (lookup_type(token
)) {
1773 if (seen_statement
) {
1774 warning(token
->pos
, "mixing declarations and code");
1777 stmt
= alloc_statement(token
->pos
, STMT_DECLARATION
);
1778 token
= external_declaration(token
, &stmt
->declaration
);
1780 seen_statement
= warn_on_mixed
;
1781 token
= statement(token
, &stmt
);
1783 add_statement(list
, stmt
);
1788 static struct token
*parameter_type_list(struct token
*token
, struct symbol
*fn
, struct ident
**p
)
1790 struct symbol_list
**list
= &fn
->arguments
;
1792 if (match_op(token
, ')')) {
1793 // No warning for "void oink ();"
1794 // Bug or feature: warns for "void oink () __attribute__ ((noreturn));"
1795 if (p
&& !match_op(token
->next
, ';'))
1796 warning(token
->pos
, "non-ANSI function declaration of function '%s'", show_ident(*p
));
1803 if (match_op(token
, SPECIAL_ELLIPSIS
)) {
1805 warning(token
->pos
, "variadic functions must have one named argument");
1807 token
= token
->next
;
1811 sym
= alloc_symbol(token
->pos
, SYM_NODE
);
1812 token
= parameter_declaration(token
, &sym
);
1813 if (sym
->ctype
.base_type
== &void_ctype
) {
1814 /* Special case: (void) */
1815 if (!*list
&& !sym
->ident
)
1817 warning(token
->pos
, "void parameter");
1819 add_symbol(list
, sym
);
1820 if (!match_op(token
, ','))
1822 token
= token
->next
;
1828 struct token
*compound_statement(struct token
*token
, struct statement
*stmt
)
1830 token
= statement_list(token
, &stmt
->stmts
);
1834 static struct expression
*identifier_expression(struct token
*token
)
1836 struct expression
*expr
= alloc_expression(token
->pos
, EXPR_IDENTIFIER
);
1837 expr
->expr_ident
= token
->ident
;
1841 static struct expression
*index_expression(struct expression
*from
, struct expression
*to
)
1843 int idx_from
, idx_to
;
1844 struct expression
*expr
= alloc_expression(from
->pos
, EXPR_INDEX
);
1846 idx_from
= get_expression_value(from
);
1849 idx_to
= get_expression_value(to
);
1850 if (idx_to
< idx_from
|| idx_from
< 0)
1851 warning(from
->pos
, "nonsense array initializer index range");
1853 expr
->idx_from
= idx_from
;
1854 expr
->idx_to
= idx_to
;
1858 static struct token
*single_initializer(struct expression
**ep
, struct token
*token
)
1860 int expect_equal
= 0;
1861 struct token
*next
= token
->next
;
1862 struct expression
**tail
= ep
;
1867 if ((token_type(token
) == TOKEN_IDENT
) && match_op(next
, ':')) {
1868 struct expression
*expr
= identifier_expression(token
);
1869 if (Wold_initializer
)
1870 warning(token
->pos
, "obsolete struct initializer, use C99 syntax");
1871 token
= initializer(&expr
->ident_expression
, next
->next
);
1872 if (expr
->ident_expression
)
1877 for (tail
= ep
, nested
= 0; ; nested
++, next
= token
->next
) {
1878 if (match_op(token
, '.') && (token_type(next
) == TOKEN_IDENT
)) {
1879 struct expression
*expr
= identifier_expression(next
);
1881 tail
= &expr
->ident_expression
;
1884 } else if (match_op(token
, '[')) {
1885 struct expression
*from
= NULL
, *to
= NULL
, *expr
;
1886 token
= constant_expression(token
->next
, &from
);
1888 sparse_error(token
->pos
, "Expected constant expression");
1891 if (match_op(token
, SPECIAL_ELLIPSIS
))
1892 token
= constant_expression(token
->next
, &to
);
1893 expr
= index_expression(from
, to
);
1895 tail
= &expr
->idx_expression
;
1896 token
= expect(token
, ']', "at end of initializer index");
1903 if (nested
&& !expect_equal
) {
1904 if (!match_op(token
, '='))
1905 warning(token
->pos
, "obsolete array initializer, use C99 syntax");
1910 token
= expect(token
, '=', "at end of initializer index");
1912 token
= initializer(tail
, token
);
1918 static struct token
*initializer_list(struct expression_list
**list
, struct token
*token
)
1920 struct expression
*expr
;
1923 token
= single_initializer(&expr
, token
);
1926 add_expression(list
, expr
);
1927 if (!match_op(token
, ','))
1929 token
= token
->next
;
1934 struct token
*initializer(struct expression
**tree
, struct token
*token
)
1936 if (match_op(token
, '{')) {
1937 struct expression
*expr
= alloc_expression(token
->pos
, EXPR_INITIALIZER
);
1939 token
= initializer_list(&expr
->expr_list
, token
->next
);
1940 return expect(token
, '}', "at end of initializer");
1942 return assignment_expression(token
, tree
);
1945 static void declare_argument(struct symbol
*sym
, struct symbol
*fn
)
1948 sparse_error(sym
->pos
, "no identifier for function argument");
1951 bind_symbol(sym
, sym
->ident
, NS_SYMBOL
);
1954 static struct token
*parse_function_body(struct token
*token
, struct symbol
*decl
,
1955 struct symbol_list
**list
)
1957 struct symbol_list
**old_symbol_list
;
1958 struct symbol
*base_type
= decl
->ctype
.base_type
;
1959 struct statement
*stmt
, **p
;
1962 old_symbol_list
= function_symbol_list
;
1963 if (decl
->ctype
.modifiers
& MOD_INLINE
) {
1964 function_symbol_list
= &decl
->inline_symbol_list
;
1965 p
= &base_type
->inline_stmt
;
1967 function_symbol_list
= &decl
->symbol_list
;
1968 p
= &base_type
->stmt
;
1970 function_computed_target_list
= NULL
;
1971 function_computed_goto_list
= NULL
;
1973 if (decl
->ctype
.modifiers
& MOD_EXTERN
) {
1974 if (!(decl
->ctype
.modifiers
& MOD_INLINE
))
1975 warning(decl
->pos
, "function '%s' with external linkage has definition", show_ident(decl
->ident
));
1977 if (!(decl
->ctype
.modifiers
& MOD_STATIC
))
1978 decl
->ctype
.modifiers
|= MOD_EXTERN
;
1980 stmt
= start_function(decl
);
1983 FOR_EACH_PTR (base_type
->arguments
, arg
) {
1984 declare_argument(arg
, base_type
);
1985 } END_FOR_EACH_PTR(arg
);
1987 token
= compound_statement(token
->next
, stmt
);
1990 if (!(decl
->ctype
.modifiers
& MOD_INLINE
))
1991 add_symbol(list
, decl
);
1992 check_declaration(decl
);
1993 function_symbol_list
= old_symbol_list
;
1994 if (function_computed_goto_list
) {
1995 if (!function_computed_target_list
)
1996 warning(decl
->pos
, "function '%s' has computed goto but no targets?", show_ident(decl
->ident
));
1998 FOR_EACH_PTR(function_computed_goto_list
, stmt
) {
1999 stmt
->target_list
= function_computed_target_list
;
2000 } END_FOR_EACH_PTR(stmt
);
2003 return expect(token
, '}', "at end of function");
2006 static void promote_k_r_types(struct symbol
*arg
)
2008 struct symbol
*base
= arg
->ctype
.base_type
;
2009 if (base
&& base
->ctype
.base_type
== &int_type
&& (base
->ctype
.modifiers
& (MOD_CHAR
| MOD_SHORT
))) {
2010 arg
->ctype
.base_type
= &int_ctype
;
2014 static void apply_k_r_types(struct symbol_list
*argtypes
, struct symbol
*fn
)
2016 struct symbol_list
*real_args
= fn
->ctype
.base_type
->arguments
;
2019 FOR_EACH_PTR(real_args
, arg
) {
2020 struct symbol
*type
;
2022 /* This is quadratic in the number of arguments. We _really_ don't care */
2023 FOR_EACH_PTR(argtypes
, type
) {
2024 if (type
->ident
== arg
->ident
)
2026 } END_FOR_EACH_PTR(type
);
2027 sparse_error(arg
->pos
, "missing type declaration for parameter '%s'", show_ident(arg
->ident
));
2031 /* "char" and "short" promote to "int" */
2032 promote_k_r_types(type
);
2034 arg
->ctype
= type
->ctype
;
2035 } END_FOR_EACH_PTR(arg
);
2037 FOR_EACH_PTR(argtypes
, arg
) {
2039 warning(arg
->pos
, "nonsensical parameter declaration '%s'", show_ident(arg
->ident
));
2040 } END_FOR_EACH_PTR(arg
);
2044 static struct token
*parse_k_r_arguments(struct token
*token
, struct symbol
*decl
,
2045 struct symbol_list
**list
)
2047 struct symbol_list
*args
= NULL
;
2049 warning(token
->pos
, "non-ANSI definition of function '%s'", show_ident(decl
->ident
));
2051 token
= declaration_list(token
, &args
);
2052 if (!match_op(token
, ';')) {
2053 sparse_error(token
->pos
, "expected ';' at end of parameter declaration");
2056 token
= token
->next
;
2057 } while (lookup_type(token
));
2059 apply_k_r_types(args
, decl
);
2061 if (!match_op(token
, '{')) {
2062 sparse_error(token
->pos
, "expected function body");
2065 return parse_function_body(token
, decl
, list
);
2068 static struct token
*toplevel_asm_declaration(struct token
*token
, struct symbol_list
**list
)
2070 struct symbol
*anon
= alloc_symbol(token
->pos
, SYM_NODE
);
2071 struct symbol
*fn
= alloc_symbol(token
->pos
, SYM_FN
);
2072 struct statement
*stmt
;
2074 anon
->ctype
.base_type
= fn
;
2075 stmt
= alloc_statement(token
->pos
, STMT_NONE
);
2078 token
= parse_asm_statement(token
, stmt
);
2080 add_symbol(list
, anon
);
2084 struct token
*external_declaration(struct token
*token
, struct symbol_list
**list
)
2086 struct ident
*ident
= NULL
;
2087 struct symbol
*decl
;
2088 struct ctype ctype
= { 0, };
2089 struct symbol
*base_type
;
2092 /* Top-level inline asm? */
2093 if (token_type(token
) == TOKEN_IDENT
) {
2094 struct symbol
*s
= lookup_keyword(token
->ident
, NS_KEYWORD
);
2095 if (s
&& s
->op
->toplevel
)
2096 return s
->op
->toplevel(token
, list
);
2099 /* Parse declaration-specifiers, if any */
2100 token
= declaration_specifiers(token
, &ctype
, 0);
2101 decl
= alloc_symbol(token
->pos
, SYM_NODE
);
2102 decl
->ctype
= ctype
;
2103 token
= declarator(token
, decl
, &ident
);
2104 apply_modifiers(token
->pos
, &decl
->ctype
);
2106 /* Just a type declaration? */
2108 return expect(token
, ';', "end of type declaration");
2110 /* type define declaration? */
2111 is_typedef
= (ctype
.modifiers
& MOD_TYPEDEF
) != 0;
2113 /* Typedefs don't have meaningful storage */
2115 ctype
.modifiers
&= ~MOD_STORAGE
;
2116 decl
->ctype
.modifiers
&= ~MOD_STORAGE
;
2117 decl
->ctype
.modifiers
|= MOD_USERTYPE
;
2120 bind_symbol(decl
, ident
, is_typedef
? NS_TYPEDEF
: NS_SYMBOL
);
2122 base_type
= decl
->ctype
.base_type
;
2125 if (base_type
&& !base_type
->ident
)
2126 base_type
->ident
= ident
;
2127 } else if (base_type
&& base_type
->type
== SYM_FN
) {
2128 /* K&R argument declaration? */
2129 if (lookup_type(token
))
2130 return parse_k_r_arguments(token
, decl
, list
);
2131 if (match_op(token
, '{'))
2132 return parse_function_body(token
, decl
, list
);
2134 if (!(decl
->ctype
.modifiers
& MOD_STATIC
))
2135 decl
->ctype
.modifiers
|= MOD_EXTERN
;
2136 } else if (base_type
== &void_ctype
&& !(decl
->ctype
.modifiers
& MOD_EXTERN
)) {
2137 sparse_error(token
->pos
, "void declaration");
2141 if (!is_typedef
&& match_op(token
, '=')) {
2142 if (decl
->ctype
.modifiers
& MOD_EXTERN
) {
2143 warning(decl
->pos
, "symbol with external linkage has initializer");
2144 decl
->ctype
.modifiers
&= ~MOD_EXTERN
;
2146 token
= initializer(&decl
->initializer
, token
->next
);
2149 if (!(decl
->ctype
.modifiers
& (MOD_EXTERN
| MOD_INLINE
))) {
2150 add_symbol(list
, decl
);
2151 fn_local_symbol(decl
);
2154 check_declaration(decl
);
2156 if (!match_op(token
, ','))
2159 token
= token
->next
;
2161 decl
= alloc_symbol(token
->pos
, SYM_NODE
);
2162 decl
->ctype
= ctype
;
2163 token
= declaration_specifiers(token
, &decl
->ctype
, 1);
2164 token
= declarator(token
, decl
, &ident
);
2165 apply_modifiers(token
->pos
, &decl
->ctype
);
2167 sparse_error(token
->pos
, "expected identifier name in type definition");
2171 bind_symbol(decl
, ident
, is_typedef
? NS_TYPEDEF
: NS_SYMBOL
);
2173 /* Function declarations are automatically extern unless specifically static */
2174 base_type
= decl
->ctype
.base_type
;
2175 if (!is_typedef
&& base_type
&& base_type
->type
== SYM_FN
) {
2176 if (!(decl
->ctype
.modifiers
& MOD_STATIC
))
2177 decl
->ctype
.modifiers
|= MOD_EXTERN
;
2180 return expect(token
, ';', "at end of declaration");