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1/* C global declaration parser for genksyms.
2 Copyright 1996, 1997 Linux International.
3
4 New implementation contributed by Richard Henderson <rth@tamu.edu>
5 Based on original work by Bjorn Ekwall <bj0rn@blox.se>
6
7 This file is part of the Linux modutils.
8
9 This program is free software; you can redistribute it and/or modify it
10 under the terms of the GNU General Public License as published by the
11 Free Software Foundation; either version 2 of the License, or (at your
12 option) any later version.
13
14 This program is distributed in the hope that it will be useful, but
15 WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 General Public License for more details.
18
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software Foundation,
21 Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
22
23
24%{
25
26#include <assert.h>
27#include <stdlib.h>
28#include <string.h>
29#include "genksyms.h"
30
31static int is_typedef;
32static int is_extern;
33static char *current_name;
34static struct string_list *decl_spec;
35
36static void yyerror(const char *);
37
38static inline void
39remove_node(struct string_list **p)
40{
41 struct string_list *node = *p;
42 *p = node->next;
43 free_node(node);
44}
45
46static inline void
47remove_list(struct string_list **pb, struct string_list **pe)
48{
49 struct string_list *b = *pb, *e = *pe;
50 *pb = e;
51 free_list(b, e);
52}
53
54/* Record definition of a struct/union/enum */
55static void record_compound(struct string_list **keyw,
56 struct string_list **ident,
57 struct string_list **body,
58 enum symbol_type type)
59{
60 struct string_list *b = *body, *i = *ident, *r;
61
62 if (i->in_source_file) {
63 remove_node(keyw);
64 (*ident)->tag = type;
65 remove_list(body, ident);
66 return;
67 }
68 r = copy_node(i); r->tag = type;
69 r->next = (*keyw)->next; *body = r; (*keyw)->next = NULL;
70 add_symbol(i->string, type, b, is_extern);
71}
72
73%}
74
75%token ASM_KEYW
76%token ATTRIBUTE_KEYW
77%token AUTO_KEYW
78%token BOOL_KEYW
79%token CHAR_KEYW
80%token CONST_KEYW
81%token DOUBLE_KEYW
82%token ENUM_KEYW
83%token EXTERN_KEYW
84%token EXTENSION_KEYW
85%token FLOAT_KEYW
86%token INLINE_KEYW
87%token INT_KEYW
88%token LONG_KEYW
89%token REGISTER_KEYW
90%token RESTRICT_KEYW
91%token SHORT_KEYW
92%token SIGNED_KEYW
93%token STATIC_KEYW
94%token STRUCT_KEYW
95%token TYPEDEF_KEYW
96%token UNION_KEYW
97%token UNSIGNED_KEYW
98%token VOID_KEYW
99%token VOLATILE_KEYW
100%token TYPEOF_KEYW
101%token VA_LIST_KEYW
102
103%token EXPORT_SYMBOL_KEYW
104
105%token ASM_PHRASE
106%token ATTRIBUTE_PHRASE
107%token TYPEOF_PHRASE
108%token BRACE_PHRASE
109%token BRACKET_PHRASE
110%token EXPRESSION_PHRASE
111
112%token CHAR
113%token DOTS
114%token IDENT
115%token INT
116%token REAL
117%token STRING
118%token TYPE
119%token OTHER
120%token FILENAME
121
122%%
123
124declaration_seq:
125 declaration
126 | declaration_seq declaration
127 ;
128
129declaration:
130 { is_typedef = 0; is_extern = 0; current_name = NULL; decl_spec = NULL; }
131 declaration1
132 { free_list(*$2, NULL); *$2 = NULL; }
133 ;
134
135declaration1:
136 EXTENSION_KEYW TYPEDEF_KEYW { is_typedef = 1; } simple_declaration
137 { $$ = $4; }
138 | TYPEDEF_KEYW { is_typedef = 1; } simple_declaration
139 { $$ = $3; }
140 | simple_declaration
141 | function_definition
142 | asm_definition
143 | export_definition
144 | error ';' { $$ = $2; }
145 | error '}' { $$ = $2; }
146 ;
147
148simple_declaration:
149 decl_specifier_seq_opt init_declarator_list_opt ';'
150 { if (current_name) {
151 struct string_list *decl = (*$3)->next;
152 (*$3)->next = NULL;
153 add_symbol(current_name,
154 is_typedef ? SYM_TYPEDEF : SYM_NORMAL,
155 decl, is_extern);
156 current_name = NULL;
157 }
158 $$ = $3;
159 }
160 ;
161
162init_declarator_list_opt:
163 /* empty */ { $$ = NULL; }
164 | init_declarator_list
165 ;
166
167init_declarator_list:
168 init_declarator
169 { struct string_list *decl = *$1;
170 *$1 = NULL;
171 add_symbol(current_name,
172 is_typedef ? SYM_TYPEDEF : SYM_NORMAL, decl, is_extern);
173 current_name = NULL;
174 $$ = $1;
175 }
176 | init_declarator_list ',' init_declarator
177 { struct string_list *decl = *$3;
178 *$3 = NULL;
179 free_list(*$2, NULL);
180 *$2 = decl_spec;
181 add_symbol(current_name,
182 is_typedef ? SYM_TYPEDEF : SYM_NORMAL, decl, is_extern);
183 current_name = NULL;
184 $$ = $3;
185 }
186 ;
187
188init_declarator:
189 declarator asm_phrase_opt attribute_opt initializer_opt
190 { $$ = $4 ? $4 : $3 ? $3 : $2 ? $2 : $1; }
191 ;
192
193/* Hang on to the specifiers so that we can reuse them. */
194decl_specifier_seq_opt:
195 /* empty */ { decl_spec = NULL; }
196 | decl_specifier_seq
197 ;
198
199decl_specifier_seq:
200 decl_specifier { decl_spec = *$1; }
201 | decl_specifier_seq decl_specifier { decl_spec = *$2; }
202 ;
203
204decl_specifier:
205 storage_class_specifier
206 { /* Version 2 checksumming ignores storage class, as that
207 is really irrelevant to the linkage. */
208 remove_node($1);
209 $$ = $1;
210 }
211 | type_specifier
212 ;
213
214storage_class_specifier:
215 AUTO_KEYW
216 | REGISTER_KEYW
217 | STATIC_KEYW
218 | EXTERN_KEYW { is_extern = 1; $$ = $1; }
219 | INLINE_KEYW { is_extern = 0; $$ = $1; }
220 ;
221
222type_specifier:
223 simple_type_specifier
224 | cvar_qualifier
225 | TYPEOF_KEYW '(' parameter_declaration ')'
226 | TYPEOF_PHRASE
227
228 /* References to s/u/e's defined elsewhere. Rearrange things
229 so that it is easier to expand the definition fully later. */
230 | STRUCT_KEYW IDENT
231 { remove_node($1); (*$2)->tag = SYM_STRUCT; $$ = $2; }
232 | UNION_KEYW IDENT
233 { remove_node($1); (*$2)->tag = SYM_UNION; $$ = $2; }
234 | ENUM_KEYW IDENT
235 { remove_node($1); (*$2)->tag = SYM_ENUM; $$ = $2; }
236
237 /* Full definitions of an s/u/e. Record it. */
238 | STRUCT_KEYW IDENT class_body
239 { record_compound($1, $2, $3, SYM_STRUCT); $$ = $3; }
240 | UNION_KEYW IDENT class_body
241 { record_compound($1, $2, $3, SYM_UNION); $$ = $3; }
242 | ENUM_KEYW IDENT enum_body
243 { record_compound($1, $2, $3, SYM_ENUM); $$ = $3; }
244 /*
245 * Anonymous enum definition. Tell add_symbol() to restart its counter.
246 */
247 | ENUM_KEYW enum_body
248 { add_symbol(NULL, SYM_ENUM, NULL, 0); $$ = $2; }
249 /* Anonymous s/u definitions. Nothing needs doing. */
250 | STRUCT_KEYW class_body { $$ = $2; }
251 | UNION_KEYW class_body { $$ = $2; }
252 ;
253
254simple_type_specifier:
255 CHAR_KEYW
256 | SHORT_KEYW
257 | INT_KEYW
258 | LONG_KEYW
259 | SIGNED_KEYW
260 | UNSIGNED_KEYW
261 | FLOAT_KEYW
262 | DOUBLE_KEYW
263 | VOID_KEYW
264 | BOOL_KEYW
265 | VA_LIST_KEYW
266 | TYPE { (*$1)->tag = SYM_TYPEDEF; $$ = $1; }
267 ;
268
269ptr_operator:
270 '*' cvar_qualifier_seq_opt
271 { $$ = $2 ? $2 : $1; }
272 ;
273
274cvar_qualifier_seq_opt:
275 /* empty */ { $$ = NULL; }
276 | cvar_qualifier_seq
277 ;
278
279cvar_qualifier_seq:
280 cvar_qualifier
281 | cvar_qualifier_seq cvar_qualifier { $$ = $2; }
282 ;
283
284cvar_qualifier:
285 CONST_KEYW | VOLATILE_KEYW | ATTRIBUTE_PHRASE
286 | RESTRICT_KEYW
287 { /* restrict has no effect in prototypes so ignore it */
288 remove_node($1);
289 $$ = $1;
290 }
291 ;
292
293declarator:
294 ptr_operator declarator { $$ = $2; }
295 | direct_declarator
296 ;
297
298direct_declarator:
299 IDENT
300 { if (current_name != NULL) {
301 error_with_pos("unexpected second declaration name");
302 YYERROR;
303 } else {
304 current_name = (*$1)->string;
305 $$ = $1;
306 }
307 }
308 | TYPE
309 { if (current_name != NULL) {
310 error_with_pos("unexpected second declaration name");
311 YYERROR;
312 } else {
313 current_name = (*$1)->string;
314 $$ = $1;
315 }
316 }
317 | direct_declarator '(' parameter_declaration_clause ')'
318 { $$ = $4; }
319 | direct_declarator '(' error ')'
320 { $$ = $4; }
321 | direct_declarator BRACKET_PHRASE
322 { $$ = $2; }
323 | '(' declarator ')'
324 { $$ = $3; }
325 | '(' error ')'
326 { $$ = $3; }
327 ;
328
329/* Nested declarators differ from regular declarators in that they do
330 not record the symbols they find in the global symbol table. */
331nested_declarator:
332 ptr_operator nested_declarator { $$ = $2; }
333 | direct_nested_declarator
334 ;
335
336direct_nested_declarator:
337 IDENT
338 | TYPE
339 | direct_nested_declarator '(' parameter_declaration_clause ')'
340 { $$ = $4; }
341 | direct_nested_declarator '(' error ')'
342 { $$ = $4; }
343 | direct_nested_declarator BRACKET_PHRASE
344 { $$ = $2; }
345 | '(' nested_declarator ')'
346 { $$ = $3; }
347 | '(' error ')'
348 { $$ = $3; }
349 ;
350
351parameter_declaration_clause:
352 parameter_declaration_list_opt DOTS { $$ = $2; }
353 | parameter_declaration_list_opt
354 | parameter_declaration_list ',' DOTS { $$ = $3; }
355 ;
356
357parameter_declaration_list_opt:
358 /* empty */ { $$ = NULL; }
359 | parameter_declaration_list
360 ;
361
362parameter_declaration_list:
363 parameter_declaration
364 | parameter_declaration_list ',' parameter_declaration
365 { $$ = $3; }
366 ;
367
368parameter_declaration:
369 decl_specifier_seq m_abstract_declarator
370 { $$ = $2 ? $2 : $1; }
371 ;
372
373m_abstract_declarator:
374 ptr_operator m_abstract_declarator
375 { $$ = $2 ? $2 : $1; }
376 | direct_m_abstract_declarator
377 ;
378
379direct_m_abstract_declarator:
380 /* empty */ { $$ = NULL; }
381 | IDENT
382 { /* For version 2 checksums, we don't want to remember
383 private parameter names. */
384 remove_node($1);
385 $$ = $1;
386 }
387 /* This wasn't really a typedef name but an identifier that
388 shadows one. */
389 | TYPE
390 { remove_node($1);
391 $$ = $1;
392 }
393 | direct_m_abstract_declarator '(' parameter_declaration_clause ')'
394 { $$ = $4; }
395 | direct_m_abstract_declarator '(' error ')'
396 { $$ = $4; }
397 | direct_m_abstract_declarator BRACKET_PHRASE
398 { $$ = $2; }
399 | '(' m_abstract_declarator ')'
400 { $$ = $3; }
401 | '(' error ')'
402 { $$ = $3; }
403 ;
404
405function_definition:
406 decl_specifier_seq_opt declarator BRACE_PHRASE
407 { struct string_list *decl = *$2;
408 *$2 = NULL;
409 add_symbol(current_name, SYM_NORMAL, decl, is_extern);
410 $$ = $3;
411 }
412 ;
413
414initializer_opt:
415 /* empty */ { $$ = NULL; }
416 | initializer
417 ;
418
419/* We never care about the contents of an initializer. */
420initializer:
421 '=' EXPRESSION_PHRASE
422 { remove_list($2, &(*$1)->next); $$ = $2; }
423 ;
424
425class_body:
426 '{' member_specification_opt '}' { $$ = $3; }
427 | '{' error '}' { $$ = $3; }
428 ;
429
430member_specification_opt:
431 /* empty */ { $$ = NULL; }
432 | member_specification
433 ;
434
435member_specification:
436 member_declaration
437 | member_specification member_declaration { $$ = $2; }
438 ;
439
440member_declaration:
441 decl_specifier_seq_opt member_declarator_list_opt ';'
442 { $$ = $3; }
443 | error ';'
444 { $$ = $2; }
445 ;
446
447member_declarator_list_opt:
448 /* empty */ { $$ = NULL; }
449 | member_declarator_list
450 ;
451
452member_declarator_list:
453 member_declarator
454 | member_declarator_list ',' member_declarator { $$ = $3; }
455 ;
456
457member_declarator:
458 nested_declarator attribute_opt { $$ = $2 ? $2 : $1; }
459 | IDENT member_bitfield_declarator { $$ = $2; }
460 | member_bitfield_declarator
461 ;
462
463member_bitfield_declarator:
464 ':' EXPRESSION_PHRASE { $$ = $2; }
465 ;
466
467attribute_opt:
468 /* empty */ { $$ = NULL; }
469 | attribute_opt ATTRIBUTE_PHRASE
470 ;
471
472enum_body:
473 '{' enumerator_list '}' { $$ = $3; }
474 | '{' enumerator_list ',' '}' { $$ = $4; }
475 ;
476
477enumerator_list:
478 enumerator
479 | enumerator_list ',' enumerator
480
481enumerator:
482 IDENT
483 {
484 const char *name = strdup((*$1)->string);
485 add_symbol(name, SYM_ENUM_CONST, NULL, 0);
486 }
487 | IDENT '=' EXPRESSION_PHRASE
488 {
489 const char *name = strdup((*$1)->string);
490 struct string_list *expr = copy_list_range(*$3, *$2);
491 add_symbol(name, SYM_ENUM_CONST, expr, 0);
492 }
493
494asm_definition:
495 ASM_PHRASE ';' { $$ = $2; }
496 ;
497
498asm_phrase_opt:
499 /* empty */ { $$ = NULL; }
500 | ASM_PHRASE
501 ;
502
503export_definition:
504 EXPORT_SYMBOL_KEYW '(' IDENT ')' ';'
505 { export_symbol((*$3)->string); $$ = $5; }
506 ;
507
508
509%%
510
511static void
512yyerror(const char *e)
513{
514 error_with_pos("%s", e);
515}
1/* SPDX-License-Identifier: GPL-2.0-or-later */
2/*
3 * C global declaration parser for genksyms.
4 * Copyright 1996, 1997 Linux International.
5 *
6 * New implementation contributed by Richard Henderson <rth@tamu.edu>
7 * Based on original work by Bjorn Ekwall <bj0rn@blox.se>
8 *
9 * This file is part of the Linux modutils.
10 */
11
12%{
13
14#include <assert.h>
15#include <stdlib.h>
16#include <string.h>
17#include "genksyms.h"
18
19static int is_typedef;
20static int is_extern;
21static char *current_name;
22static struct string_list *decl_spec;
23
24static void yyerror(const char *);
25
26static inline void
27remove_node(struct string_list **p)
28{
29 struct string_list *node = *p;
30 *p = node->next;
31 free_node(node);
32}
33
34static inline void
35remove_list(struct string_list **pb, struct string_list **pe)
36{
37 struct string_list *b = *pb, *e = *pe;
38 *pb = e;
39 free_list(b, e);
40}
41
42/* Record definition of a struct/union/enum */
43static void record_compound(struct string_list **keyw,
44 struct string_list **ident,
45 struct string_list **body,
46 enum symbol_type type)
47{
48 struct string_list *b = *body, *i = *ident, *r;
49
50 if (i->in_source_file) {
51 remove_node(keyw);
52 (*ident)->tag = type;
53 remove_list(body, ident);
54 return;
55 }
56 r = copy_node(i); r->tag = type;
57 r->next = (*keyw)->next; *body = r; (*keyw)->next = NULL;
58 add_symbol(i->string, type, b, is_extern);
59}
60
61%}
62
63%token ASM_KEYW
64%token ATTRIBUTE_KEYW
65%token AUTO_KEYW
66%token BOOL_KEYW
67%token BUILTIN_INT_KEYW
68%token CHAR_KEYW
69%token CONST_KEYW
70%token DOUBLE_KEYW
71%token ENUM_KEYW
72%token EXTERN_KEYW
73%token EXTENSION_KEYW
74%token FLOAT_KEYW
75%token INLINE_KEYW
76%token INT_KEYW
77%token LONG_KEYW
78%token REGISTER_KEYW
79%token RESTRICT_KEYW
80%token SHORT_KEYW
81%token SIGNED_KEYW
82%token STATIC_KEYW
83%token STATIC_ASSERT_KEYW
84%token STRUCT_KEYW
85%token TYPEDEF_KEYW
86%token UNION_KEYW
87%token UNSIGNED_KEYW
88%token VOID_KEYW
89%token VOLATILE_KEYW
90%token TYPEOF_KEYW
91%token VA_LIST_KEYW
92
93%token EXPORT_SYMBOL_KEYW
94
95%token ASM_PHRASE
96%token ATTRIBUTE_PHRASE
97%token TYPEOF_PHRASE
98%token BRACE_PHRASE
99%token BRACKET_PHRASE
100%token EXPRESSION_PHRASE
101%token STATIC_ASSERT_PHRASE
102
103%token CHAR
104%token DOTS
105%token IDENT
106%token INT
107%token REAL
108%token STRING
109%token TYPE
110%token OTHER
111%token FILENAME
112
113%%
114
115declaration_seq:
116 declaration
117 | declaration_seq declaration
118 ;
119
120declaration:
121 { is_typedef = 0; is_extern = 0; current_name = NULL; decl_spec = NULL; }
122 declaration1
123 { free_list(*$2, NULL); *$2 = NULL; }
124 ;
125
126declaration1:
127 EXTENSION_KEYW TYPEDEF_KEYW { is_typedef = 1; } simple_declaration
128 { $$ = $4; }
129 | TYPEDEF_KEYW { is_typedef = 1; } simple_declaration
130 { $$ = $3; }
131 | simple_declaration
132 | function_definition
133 | asm_definition
134 | export_definition
135 | static_assert
136 | error ';' { $$ = $2; }
137 | error '}' { $$ = $2; }
138 ;
139
140simple_declaration:
141 decl_specifier_seq_opt init_declarator_list_opt ';'
142 { if (current_name) {
143 struct string_list *decl = (*$3)->next;
144 (*$3)->next = NULL;
145 add_symbol(current_name,
146 is_typedef ? SYM_TYPEDEF : SYM_NORMAL,
147 decl, is_extern);
148 current_name = NULL;
149 }
150 $$ = $3;
151 }
152 ;
153
154init_declarator_list_opt:
155 /* empty */ { $$ = NULL; }
156 | init_declarator_list { free_list(decl_spec, NULL); $$ = $1; }
157 ;
158
159init_declarator_list:
160 init_declarator
161 { struct string_list *decl = *$1;
162 *$1 = NULL;
163
164 /* avoid sharing among multiple init_declarators */
165 if (decl_spec)
166 decl_spec = copy_list_range(decl_spec, NULL);
167
168 add_symbol(current_name,
169 is_typedef ? SYM_TYPEDEF : SYM_NORMAL, decl, is_extern);
170 current_name = NULL;
171 $$ = $1;
172 }
173 | init_declarator_list ',' init_declarator
174 { struct string_list *decl = *$3;
175 *$3 = NULL;
176 free_list(*$2, NULL);
177 *$2 = decl_spec;
178
179 /* avoid sharing among multiple init_declarators */
180 if (decl_spec)
181 decl_spec = copy_list_range(decl_spec, NULL);
182
183 add_symbol(current_name,
184 is_typedef ? SYM_TYPEDEF : SYM_NORMAL, decl, is_extern);
185 current_name = NULL;
186 $$ = $3;
187 }
188 ;
189
190init_declarator:
191 declarator asm_phrase_opt attribute_opt initializer_opt
192 { $$ = $4 ? $4 : $3 ? $3 : $2 ? $2 : $1; }
193 ;
194
195/* Hang on to the specifiers so that we can reuse them. */
196decl_specifier_seq_opt:
197 /* empty */ { decl_spec = NULL; }
198 | decl_specifier_seq
199 ;
200
201decl_specifier_seq:
202 decl_specifier { decl_spec = *$1; }
203 | decl_specifier_seq decl_specifier { decl_spec = *$2; }
204 ;
205
206decl_specifier:
207 storage_class_specifier
208 { /* Version 2 checksumming ignores storage class, as that
209 is really irrelevant to the linkage. */
210 remove_node($1);
211 $$ = $1;
212 }
213 | type_specifier
214 ;
215
216storage_class_specifier:
217 AUTO_KEYW
218 | REGISTER_KEYW
219 | STATIC_KEYW
220 | EXTERN_KEYW { is_extern = 1; $$ = $1; }
221 | INLINE_KEYW { is_extern = 0; $$ = $1; }
222 ;
223
224type_specifier:
225 simple_type_specifier
226 | cvar_qualifier
227 | TYPEOF_KEYW '(' parameter_declaration ')'
228 | TYPEOF_PHRASE
229
230 /* References to s/u/e's defined elsewhere. Rearrange things
231 so that it is easier to expand the definition fully later. */
232 | STRUCT_KEYW IDENT
233 { remove_node($1); (*$2)->tag = SYM_STRUCT; $$ = $2; }
234 | UNION_KEYW IDENT
235 { remove_node($1); (*$2)->tag = SYM_UNION; $$ = $2; }
236 | ENUM_KEYW IDENT
237 { remove_node($1); (*$2)->tag = SYM_ENUM; $$ = $2; }
238
239 /* Full definitions of an s/u/e. Record it. */
240 | STRUCT_KEYW IDENT class_body
241 { record_compound($1, $2, $3, SYM_STRUCT); $$ = $3; }
242 | UNION_KEYW IDENT class_body
243 { record_compound($1, $2, $3, SYM_UNION); $$ = $3; }
244 | ENUM_KEYW IDENT enum_body
245 { record_compound($1, $2, $3, SYM_ENUM); $$ = $3; }
246 /*
247 * Anonymous enum definition. Tell add_symbol() to restart its counter.
248 */
249 | ENUM_KEYW enum_body
250 { add_symbol(NULL, SYM_ENUM, NULL, 0); $$ = $2; }
251 /* Anonymous s/u definitions. Nothing needs doing. */
252 | STRUCT_KEYW class_body { $$ = $2; }
253 | UNION_KEYW class_body { $$ = $2; }
254 ;
255
256simple_type_specifier:
257 CHAR_KEYW
258 | SHORT_KEYW
259 | INT_KEYW
260 | LONG_KEYW
261 | SIGNED_KEYW
262 | UNSIGNED_KEYW
263 | FLOAT_KEYW
264 | DOUBLE_KEYW
265 | VOID_KEYW
266 | BOOL_KEYW
267 | VA_LIST_KEYW
268 | BUILTIN_INT_KEYW
269 | TYPE { (*$1)->tag = SYM_TYPEDEF; $$ = $1; }
270 ;
271
272ptr_operator:
273 '*' cvar_qualifier_seq_opt
274 { $$ = $2 ? $2 : $1; }
275 ;
276
277cvar_qualifier_seq_opt:
278 /* empty */ { $$ = NULL; }
279 | cvar_qualifier_seq
280 ;
281
282cvar_qualifier_seq:
283 cvar_qualifier
284 | cvar_qualifier_seq cvar_qualifier { $$ = $2; }
285 ;
286
287cvar_qualifier:
288 CONST_KEYW | VOLATILE_KEYW | ATTRIBUTE_PHRASE
289 | RESTRICT_KEYW
290 { /* restrict has no effect in prototypes so ignore it */
291 remove_node($1);
292 $$ = $1;
293 }
294 ;
295
296declarator:
297 ptr_operator declarator { $$ = $2; }
298 | direct_declarator
299 ;
300
301direct_declarator:
302 IDENT
303 { if (current_name != NULL) {
304 error_with_pos("unexpected second declaration name");
305 YYERROR;
306 } else {
307 current_name = (*$1)->string;
308 $$ = $1;
309 }
310 }
311 | TYPE
312 { if (current_name != NULL) {
313 error_with_pos("unexpected second declaration name");
314 YYERROR;
315 } else {
316 current_name = (*$1)->string;
317 $$ = $1;
318 }
319 }
320 | direct_declarator '(' parameter_declaration_clause ')'
321 { $$ = $4; }
322 | direct_declarator '(' error ')'
323 { $$ = $4; }
324 | direct_declarator BRACKET_PHRASE
325 { $$ = $2; }
326 | '(' declarator ')'
327 { $$ = $3; }
328 ;
329
330/* Nested declarators differ from regular declarators in that they do
331 not record the symbols they find in the global symbol table. */
332nested_declarator:
333 ptr_operator nested_declarator { $$ = $2; }
334 | direct_nested_declarator
335 ;
336
337direct_nested_declarator:
338 IDENT
339 | TYPE
340 | direct_nested_declarator '(' parameter_declaration_clause ')'
341 { $$ = $4; }
342 | direct_nested_declarator '(' error ')'
343 { $$ = $4; }
344 | direct_nested_declarator BRACKET_PHRASE
345 { $$ = $2; }
346 | '(' nested_declarator ')'
347 { $$ = $3; }
348 | '(' error ')'
349 { $$ = $3; }
350 ;
351
352parameter_declaration_clause:
353 parameter_declaration_list_opt DOTS { $$ = $2; }
354 | parameter_declaration_list_opt
355 | parameter_declaration_list ',' DOTS { $$ = $3; }
356 ;
357
358parameter_declaration_list_opt:
359 /* empty */ { $$ = NULL; }
360 | parameter_declaration_list
361 ;
362
363parameter_declaration_list:
364 parameter_declaration
365 | parameter_declaration_list ',' parameter_declaration
366 { $$ = $3; }
367 ;
368
369parameter_declaration:
370 decl_specifier_seq m_abstract_declarator
371 { $$ = $2 ? $2 : $1; }
372 ;
373
374m_abstract_declarator:
375 ptr_operator m_abstract_declarator
376 { $$ = $2 ? $2 : $1; }
377 | direct_m_abstract_declarator
378 ;
379
380direct_m_abstract_declarator:
381 /* empty */ { $$ = NULL; }
382 | IDENT
383 { /* For version 2 checksums, we don't want to remember
384 private parameter names. */
385 remove_node($1);
386 $$ = $1;
387 }
388 /* This wasn't really a typedef name but an identifier that
389 shadows one. */
390 | TYPE
391 { remove_node($1);
392 $$ = $1;
393 }
394 | direct_m_abstract_declarator '(' parameter_declaration_clause ')'
395 { $$ = $4; }
396 | direct_m_abstract_declarator '(' error ')'
397 { $$ = $4; }
398 | direct_m_abstract_declarator BRACKET_PHRASE
399 { $$ = $2; }
400 | '(' m_abstract_declarator ')'
401 { $$ = $3; }
402 | '(' error ')'
403 { $$ = $3; }
404 ;
405
406function_definition:
407 decl_specifier_seq_opt declarator BRACE_PHRASE
408 { struct string_list *decl = *$2;
409 *$2 = NULL;
410 add_symbol(current_name, SYM_NORMAL, decl, is_extern);
411 $$ = $3;
412 }
413 ;
414
415initializer_opt:
416 /* empty */ { $$ = NULL; }
417 | initializer
418 ;
419
420/* We never care about the contents of an initializer. */
421initializer:
422 '=' EXPRESSION_PHRASE
423 { remove_list($2, &(*$1)->next); $$ = $2; }
424 ;
425
426class_body:
427 '{' member_specification_opt '}' { $$ = $3; }
428 | '{' error '}' { $$ = $3; }
429 ;
430
431member_specification_opt:
432 /* empty */ { $$ = NULL; }
433 | member_specification
434 ;
435
436member_specification:
437 member_declaration
438 | member_specification member_declaration { $$ = $2; }
439 ;
440
441member_declaration:
442 decl_specifier_seq_opt member_declarator_list_opt ';'
443 { $$ = $3; }
444 | error ';'
445 { $$ = $2; }
446 ;
447
448member_declarator_list_opt:
449 /* empty */ { $$ = NULL; }
450 | member_declarator_list
451 ;
452
453member_declarator_list:
454 member_declarator
455 | member_declarator_list ',' member_declarator { $$ = $3; }
456 ;
457
458member_declarator:
459 nested_declarator attribute_opt { $$ = $2 ? $2 : $1; }
460 | IDENT member_bitfield_declarator { $$ = $2; }
461 | member_bitfield_declarator
462 ;
463
464member_bitfield_declarator:
465 ':' EXPRESSION_PHRASE { $$ = $2; }
466 ;
467
468attribute_opt:
469 /* empty */ { $$ = NULL; }
470 | attribute_opt ATTRIBUTE_PHRASE
471 ;
472
473enum_body:
474 '{' enumerator_list '}' { $$ = $3; }
475 | '{' enumerator_list ',' '}' { $$ = $4; }
476 ;
477
478enumerator_list:
479 enumerator
480 | enumerator_list ',' enumerator
481
482enumerator:
483 IDENT
484 {
485 const char *name = (*$1)->string;
486 add_symbol(name, SYM_ENUM_CONST, NULL, 0);
487 }
488 | IDENT '=' EXPRESSION_PHRASE
489 {
490 const char *name = (*$1)->string;
491 struct string_list *expr = copy_list_range(*$3, *$2);
492 add_symbol(name, SYM_ENUM_CONST, expr, 0);
493 }
494
495asm_definition:
496 ASM_PHRASE ';' { $$ = $2; }
497 ;
498
499asm_phrase_opt:
500 /* empty */ { $$ = NULL; }
501 | ASM_PHRASE
502 ;
503
504export_definition:
505 EXPORT_SYMBOL_KEYW '(' IDENT ')' ';'
506 { export_symbol((*$3)->string); $$ = $5; }
507 ;
508
509/* Ignore any module scoped _Static_assert(...) */
510static_assert:
511 STATIC_ASSERT_PHRASE ';' { $$ = $2; }
512 ;
513
514%%
515
516static void
517yyerror(const char *e)
518{
519 error_with_pos("%s", e);
520}