| 1 | %{ |
| 2 | |
| 3 | /* enable chatty error messages */ |
| 4 | #define YYERROR_VERBOSE 1 |
| 5 | |
| 6 | /* figure out the location of a non-terminal. We discard extent information |
| 7 | * but this isn't necessarily disastrous for our purpose. */ |
| 8 | #define YYLLOC_DEFAULT(Current, Rhs, N) do { \ |
| 9 | Current = Rhs[1]; \ |
| 10 | } while(0) |
| 11 | |
| 12 | #include "cparse.h" |
| 13 | #include <stddef.h> |
| 14 | #include <assert.h> |
| 15 | |
| 16 | /* various bits of parsing infrastructure. increasingly i'm thinking some of |
| 17 | * this belongs in its own file. still... */ |
| 18 | |
| 19 | /* hang on to both ends of a declarator while it is being parsed. This idiom |
| 20 | * is used a lot with anonymous structures below, but we need an actual name |
| 21 | * for the type for this particular case. */ |
| 22 | struct parsing_declarator { |
| 23 | struct declarator_type *first, **end; |
| 24 | char *name; /* pick up name */ |
| 25 | }; |
| 26 | |
| 27 | /* we need to know what declaration specifiers apply to the current |
| 28 | * declarator. This means we need a stack of them to cope with nested |
| 29 | * declarations. */ |
| 30 | struct declaration_specifiers_stack { |
| 31 | struct declaration_specifiers_stack *next; |
| 32 | struct declaration_specifiers *ds; |
| 33 | }; |
| 34 | |
| 35 | static struct declaration_specifiers_stack *declaration_specifiers_stack; |
| 36 | |
| 37 | static void push_declaration_specifiers(struct declaration_specifiers *ds) { |
| 38 | struct declaration_specifiers_stack *n; |
| 39 | |
| 40 | NEW(n); |
| 41 | n->next = declaration_specifiers_stack; |
| 42 | n->ds = ds; |
| 43 | declaration_specifiers_stack = n; |
| 44 | } |
| 45 | |
| 46 | static void pop_declaration_specifiers(void) { |
| 47 | /* can we have ->= and .= operators? */ |
| 48 | declaration_specifiers_stack = declaration_specifiers_stack->next; |
| 49 | } |
| 50 | |
| 51 | static struct declaration_specifiers *top_declaration_specifiers(void) { |
| 52 | return declaration_specifiers_stack->ds; |
| 53 | } |
| 54 | |
| 55 | static void check_top_declaration_specifier(struct declaration_specifiers *ds) { |
| 56 | assert(declaration_specifiers_stack->ds == ds); |
| 57 | } |
| 58 | |
| 59 | /* make up an actual declarator from a completed parse */ |
| 60 | static struct declarator *get_declarator(struct parsing_declarator *pd, |
| 61 | const struct location *where) { |
| 62 | struct declarator *d; |
| 63 | |
| 64 | NEW(d); |
| 65 | d->declarator_type = pd->first; |
| 66 | d->declaration_specifiers = top_declaration_specifiers(); |
| 67 | d->name = pd->name; |
| 68 | d->where = *where; |
| 69 | return d; |
| 70 | } |
| 71 | |
| 72 | static struct expression expr_star; /* kludge */ |
| 73 | |
| 74 | static void warn_old_style_function(const struct location *where) { |
| 75 | inputwarning(where, warn_obsolete, |
| 76 | "old-style function declarator"); |
| 77 | } |
| 78 | |
| 79 | void parser_init(FILE *fp) { |
| 80 | yyin = fp; |
| 81 | translation_unit = 0; |
| 82 | scope_init(); |
| 83 | gcc_extensions(); |
| 84 | } |
| 85 | |
| 86 | %} |
| 87 | |
| 88 | %debug |
| 89 | %verbose |
| 90 | %expect 11 |
| 91 | %defines |
| 92 | |
| 93 | %union { |
| 94 | long i; |
| 95 | unsigned long u; |
| 96 | char *s; |
| 97 | struct { |
| 98 | char *name; |
| 99 | struct declarator *declarator; |
| 100 | } name; |
| 101 | struct declaration_specifiers *declaration_specifiers; |
| 102 | struct declarator *declarator; |
| 103 | struct parsing_declarator *declarator_parse; |
| 104 | struct declaration *declaration; |
| 105 | struct identifier_list *identifier_list; |
| 106 | struct expression *expression; |
| 107 | struct expression_list *expression_list; |
| 108 | struct initializer *initializer; |
| 109 | struct designator *designator; |
| 110 | struct external_declaration *external_declaration; |
| 111 | struct function_definition *function_definition; |
| 112 | struct enumerator *enumerator; |
| 113 | struct statement *statement; |
| 114 | /* transients for parsing lists */ |
| 115 | struct { struct declarator *first, **end; } *declarator_list; |
| 116 | struct { struct declaration *first, **end; } *declaration_list; |
| 117 | struct { struct identifier_list *first, **end; } *identifier_list_parse; |
| 118 | struct { struct expression_list *first, **end; } *parsing_expression_list; |
| 119 | struct { struct initializer *first, **end; } *initializer_list; |
| 120 | struct { struct designator *first, **end; } *designator_list; |
| 121 | struct { struct external_declaration *first, **end; } *external_declaration_list; |
| 122 | struct { struct enumerator *first, **end; } *enumerator_list; |
| 123 | struct { struct statement *first, **end; } *statement_list; |
| 124 | } |
| 125 | |
| 126 | %token <i> MEMBER "->" |
| 127 | %token <i> INCR "++" |
| 128 | %token <i> DECR "--" |
| 129 | %token <i> SL "<<" |
| 130 | %token <i> SR ">>" |
| 131 | %token <i> LE "<=" |
| 132 | %token <i> GE ">=" |
| 133 | %token <i> EQ "==" |
| 134 | %token <i> NE "!=" |
| 135 | %token <i> AND "&&" |
| 136 | %token <i> OR "||" |
| 137 | %token <i> MULEQ "*=" |
| 138 | %token <i> DIVEQ "/=" |
| 139 | %token <i> MODEQ "%=" |
| 140 | %token <i> ADDEQ "+=" |
| 141 | %token <i> SUBEQ "-=" |
| 142 | %token <i> SLEQ "<<=" |
| 143 | %token <i> SREQ ">>=" |
| 144 | %token <i> ANDEQ "&=" |
| 145 | %token <i> XOREQ "^=" |
| 146 | %token <i> OREQ "|=" |
| 147 | |
| 148 | %token <i> VARARG "..." |
| 149 | |
| 150 | %token <i> '&' |
| 151 | %token <i> '*' |
| 152 | %token <i> '+' |
| 153 | %token <i> '-' |
| 154 | %token <i> '~' |
| 155 | %token <i> '!' |
| 156 | %token <i> '/' |
| 157 | %token <i> '%' |
| 158 | %token <i> '<' |
| 159 | %token <i> '>' |
| 160 | %token <i> '^' |
| 161 | %token <i> '|' |
| 162 | %token <i> ',' |
| 163 | %token <i> '=' |
| 164 | %token <i> '.' |
| 165 | |
| 166 | %token <u> AUTO "auto" |
| 167 | %token BREAK "break" |
| 168 | %token CASE "case" |
| 169 | %token <u> CHAR "char" |
| 170 | %token <u> CONST "const" |
| 171 | %token CONTINUE "continue" |
| 172 | %token DEFAULT "default" |
| 173 | %token DO "do" |
| 174 | %token <u> DOUBLE "double" |
| 175 | %token ELSE "else" |
| 176 | %token ENUM "enum" |
| 177 | %token <u> EXTERN "extern" |
| 178 | %token <u> FLOAT "float" |
| 179 | %token FOR "for" |
| 180 | %token GOTO "goto" |
| 181 | %token IF "if" |
| 182 | %token <u> INLINE "inline" |
| 183 | %token <u> INT "int" |
| 184 | %token <u> LONG "long" |
| 185 | %token <u> REGISTER "register" |
| 186 | %token <u> RESTRICT "restrict" |
| 187 | %token RETURN "return" |
| 188 | %token <u> SHORT "short" |
| 189 | %token <u> SIGNED "signed" |
| 190 | %token SIZEOF "sizeof" |
| 191 | %token <u> STATIC "static" |
| 192 | %token <u> STRUCT "struct" |
| 193 | %token SWITCH "switch" |
| 194 | %token <u> TYPEDEF "typedef" |
| 195 | %token <u> UNION "union" |
| 196 | %token <u> UNSIGNED "unsigned" |
| 197 | %token <u> VOID "void" |
| 198 | %token <u> VOLATILE "volatile" |
| 199 | %token WHILE "while" |
| 200 | %token <u> BOOL "_Bool" |
| 201 | %token <u> COMPLEX "_Complex" |
| 202 | %token <u> IMAGINARY "_Imaginary" |
| 203 | %token ATTRIBUTE "__attribute__" |
| 204 | %token <u> GCC_VA_LIST "__builtin_va_list" |
| 205 | %token GCC_VA_ARG "__builtin_va_arg" |
| 206 | %token GCC_EXPECT "__builtin_expect" |
| 207 | |
| 208 | %token <name> TYPEDEF_NAME |
| 209 | %token <name> ID |
| 210 | %token <s> NUMBER |
| 211 | %token <s> STRINGLIT |
| 212 | %token <s> CHARLIT |
| 213 | %token <s> WSTRINGLIT |
| 214 | %token <s> WCHARLIT |
| 215 | |
| 216 | %type <u> storage_class_specifier |
| 217 | %type <u> type_qualifier |
| 218 | %type <u> struct_or_union |
| 219 | %type <u> type_qualifier_list |
| 220 | %type <u> type_qualifier_list_opt |
| 221 | %type <u> function_specifier |
| 222 | %type <u> basic_type_specifier |
| 223 | |
| 224 | %type <name> identifier |
| 225 | %type <name> identifier_opt |
| 226 | |
| 227 | %type <declaration_specifiers> type_specifier |
| 228 | %type <declaration_specifiers> struct_or_union_specifier |
| 229 | %type <declaration_specifiers> enum_specifier |
| 230 | |
| 231 | %type <declaration_specifiers> declaration_specifiers |
| 232 | %type <declaration_specifiers> declaration_specifiers_definition |
| 233 | %type <declaration_specifiers> declaration_specifiers_opt |
| 234 | %type <declaration_specifiers> parameter_declaration_specifiers |
| 235 | %type <declaration_specifiers> specifier_qualifier_list |
| 236 | %type <declaration_specifiers> specifier_qualifier_list_definition |
| 237 | %type <declaration_specifiers> specifier_qualifier_list_opt |
| 238 | %type <declaration_specifiers> array_specifiers |
| 239 | %type <declarator> declarator_opt |
| 240 | %type <declarator> init_declarator_list_opt |
| 241 | %type <declarator> attributed_declarator |
| 242 | %type <declarator> attributed_init_declarator |
| 243 | %type <declarator> struct_declarator |
| 244 | %type <declarator_list> init_declarator_list |
| 245 | %type <declarator_list> struct_declarator_list |
| 246 | |
| 247 | %type <declarator_parse> declarator pointer |
| 248 | %type <declarator_parse> direct_declarator |
| 249 | %type <declarator_parse> abstract_declarator |
| 250 | %type <declarator_parse> pointer_opt |
| 251 | %type <declarator_parse> direct_abstract_declarator |
| 252 | %type <declarator_parse> direct_abstract_declarator_opt |
| 253 | %type <declarator_parse> abstract_declarator_opt |
| 254 | |
| 255 | %type <declaration> declaration |
| 256 | %type <declaration> struct_declaration |
| 257 | %type <declaration> parameter_declaration |
| 258 | %type <declaration> type_name |
| 259 | %type <declaration> main |
| 260 | %type <external_declaration_list> translation_unit |
| 261 | %type <external_declaration> external_declaration |
| 262 | %type <declaration_list> struct_declaration_list |
| 263 | %type <declaration_list> parameter_list |
| 264 | %type <declaration_list> declaration_list_opt |
| 265 | |
| 266 | %type <identifier_list_parse> ID_list |
| 267 | %type <identifier_list> ID_list_opt |
| 268 | |
| 269 | %type <expression> expression |
| 270 | %type <expression> expression_opt |
| 271 | %type <expression> primary_expression |
| 272 | %type <expression> postfix_expression |
| 273 | %type <expression> unary_expression |
| 274 | %type <expression> cast_expression |
| 275 | %type <expression> multiplicative_expression |
| 276 | %type <expression> additive_expression |
| 277 | %type <expression> shift_expression |
| 278 | %type <expression> relational_expression |
| 279 | %type <expression> equality_expression |
| 280 | %type <expression> AND_expression |
| 281 | %type <expression> exclusive_OR_expression |
| 282 | %type <expression> inclusive_OR_expression |
| 283 | %type <expression> logical_AND_expression |
| 284 | %type <expression> logical_OR_expression |
| 285 | %type <expression> conditional_expression |
| 286 | %type <expression> assignment_expression |
| 287 | %type <expression> constant_expression |
| 288 | |
| 289 | %type <expression> array_size |
| 290 | |
| 291 | %type <expression_list> argument_expression_list_opt |
| 292 | %type <parsing_expression_list> argument_expression_list |
| 293 | |
| 294 | %type <initializer> initializer |
| 295 | %type <initializer> designated_initializer |
| 296 | %type <initializer_list> initializer_list |
| 297 | %type <designator_list> designator_list |
| 298 | %type <designator> designator |
| 299 | |
| 300 | %type <i> variadic |
| 301 | %type <i> incrdecr |
| 302 | %type <i> member_operator |
| 303 | %type <i> unary_operator |
| 304 | %type <i> multiplicative_operator |
| 305 | %type <i> additive_operator |
| 306 | %type <i> shift_operator |
| 307 | %type <i> relational_operator |
| 308 | %type <i> equality_operator |
| 309 | %type <i> assignment_operator |
| 310 | |
| 311 | %type <i> comma_opt |
| 312 | |
| 313 | %type <function_definition> function_definition |
| 314 | %type <enumerator> enumerator |
| 315 | %type <enumerator> registered_enumerator |
| 316 | %type <enumerator_list> enumerator_list |
| 317 | |
| 318 | %type <statement> statement |
| 319 | %type <statement> function_body |
| 320 | %type <statement> block_item |
| 321 | %type <statement> else_part_opt |
| 322 | %type <statement_list> block_item_list_opt |
| 323 | |
| 324 | %% |
| 325 | |
| 326 | main: |
| 327 | translation_unit { |
| 328 | translation_unit = $1->first; |
| 329 | } |
| 330 | ; |
| 331 | |
| 332 | /* kludge */ |
| 333 | identifier: |
| 334 | ID |
| 335 | | TYPEDEF_NAME |
| 336 | ; |
| 337 | |
| 338 | identifier_opt: |
| 339 | identifier |
| 340 | | { |
| 341 | $$.name = 0; |
| 342 | $$.declarator = 0; |
| 343 | } |
| 344 | ; |
| 345 | |
| 346 | /* C99 6.5 expressions */ |
| 347 | |
| 348 | primary_expression: |
| 349 | ID { |
| 350 | struct declarator *d; |
| 351 | $$ = expr(ex_id, &@1); |
| 352 | $$->u.name = $1.name; |
| 353 | d = $1.declarator; |
| 354 | if(!d) { |
| 355 | inputerror(&@1, "undeclared identifier '%s'", $1.name); |
| 356 | } else if(d->declaration_specifiers |
| 357 | && (d->declaration_specifiers->storage_class_specifiers |
| 358 | & SCS_TYPEDEF)) |
| 359 | inputerror(&@1, "typedef-name '%s' used in expression", $1); |
| 360 | else |
| 361 | $$->valuetype = resolve_typedefs(d); |
| 362 | } |
| 363 | | NUMBER { |
| 364 | $$ = expr(ex_number, &@1); |
| 365 | $$->u.constant = $1; |
| 366 | $$->valuetype = numbertype($$); |
| 367 | } |
| 368 | | CHARLIT { |
| 369 | $$ = stringexpr(ex_char, $1, &@1); |
| 370 | } |
| 371 | | STRINGLIT { |
| 372 | $$ = stringexpr(ex_string, $1, &@1); |
| 373 | } |
| 374 | | WCHARLIT { |
| 375 | $$ = stringexpr(ex_wchar, $1, &@1); |
| 376 | } |
| 377 | | WSTRINGLIT { |
| 378 | $$ = stringexpr(ex_wstring, $1, &@1); |
| 379 | } |
| 380 | | '(' expression ')' { |
| 381 | $$ = paren($2, &@1); |
| 382 | } |
| 383 | ; |
| 384 | |
| 385 | postfix_expression: |
| 386 | primary_expression |
| 387 | | postfix_expression '[' expression ']' { |
| 388 | $$ = binary('[', $1, $3, &@2); |
| 389 | } |
| 390 | | postfix_expression '(' argument_expression_list_opt ')' { |
| 391 | $$ = fncallexpr($1, $3, &@2); |
| 392 | } |
| 393 | | GCC_VA_ARG '(' assignment_expression ',' type_name ')' { |
| 394 | $$ = expr(ex_gcc_va_arg, &@2); |
| 395 | $$->u.gcc_va_arg.arg = $3; |
| 396 | $$->u.gcc_va_arg.type = $5; |
| 397 | $$->valuetype = resolve_typedefs($5->declarator_list); |
| 398 | } |
| 399 | | GCC_EXPECT '(' assignment_expression ',' assignment_expression ')' { |
| 400 | /* we can't hack this in as a function as the return type is that of |
| 401 | * the LH argument */ |
| 402 | $$ = expr(ex_gcc_expect, &@1); |
| 403 | /* XXX does the LH arg undergo any implicit conversions? */ |
| 404 | $$->u.binary.l = $3; |
| 405 | $$->u.binary.r = $5; |
| 406 | $$->valuetype = $3->valuetype; |
| 407 | } |
| 408 | | postfix_expression member_operator identifier { |
| 409 | struct expression *e = expr(ex_id, &@2); |
| 410 | e->u.name = $3.name; |
| 411 | $$ = binary($2, $1, e, &@2); |
| 412 | } |
| 413 | | postfix_expression incrdecr { |
| 414 | $$ = postfix($2, $1, &@2); |
| 415 | } |
| 416 | | '(' type_name ')' '{' initializer_list comma_opt '}' { |
| 417 | $$ = expr(ex_compound_literal, &@1); |
| 418 | $$->u.compound_literal.type = $2; |
| 419 | $$->u.compound_literal.value = $5->first; |
| 420 | declaration_constraints($2, dc_compound_literal); |
| 421 | $$->valuetype = resolve_typedefs($2->declarator_list); |
| 422 | } |
| 423 | ; |
| 424 | |
| 425 | member_operator: '.' | "->" ; |
| 426 | |
| 427 | incrdecr: "++" | "--" ; |
| 428 | |
| 429 | argument_expression_list: |
| 430 | assignment_expression { |
| 431 | NEW($$); |
| 432 | NEW($$->first); |
| 433 | $$->first->e = $1; |
| 434 | $$->end = &$$->first->next; |
| 435 | } |
| 436 | | argument_expression_list ',' assignment_expression { |
| 437 | struct expression_list *e; |
| 438 | NEW(e); |
| 439 | e->e = $3; |
| 440 | *($$ = $1)->end = e; |
| 441 | $$->end = &e->next; |
| 442 | } |
| 443 | ; |
| 444 | |
| 445 | argument_expression_list_opt: |
| 446 | argument_expression_list { $$ = $1->first; } |
| 447 | | { $$ = 0; } |
| 448 | ; |
| 449 | |
| 450 | unary_expression: |
| 451 | postfix_expression |
| 452 | | unary_operator cast_expression { |
| 453 | $$ = prefix($1, $2, &@1); |
| 454 | } |
| 455 | | "sizeof" unary_expression { |
| 456 | $$ = prefix(SIZEOF, $2, &@1); |
| 457 | } |
| 458 | | "sizeof" '(' type_name ')' { |
| 459 | $$ = expr(ex_sizeof_type, &@1); |
| 460 | $$->u.type = $3; |
| 461 | declaration_constraints($3, dc_sizeof); |
| 462 | } |
| 463 | ; |
| 464 | |
| 465 | /* putting sizeof in here would conflict with sizeof(type) */ |
| 466 | unary_operator: |
| 467 | '&' |
| 468 | | '*' |
| 469 | | '+' |
| 470 | | '-' |
| 471 | | '~' |
| 472 | | '!' |
| 473 | | incrdecr |
| 474 | ; |
| 475 | |
| 476 | cast_expression: |
| 477 | unary_expression |
| 478 | | '(' type_name ')' cast_expression { |
| 479 | $$ = expr(ex_cast, &@1); |
| 480 | $$->valuetype = $2->declarator_list; |
| 481 | $$->u.cast = $4; |
| 482 | declaration_constraints($2, dc_cast); |
| 483 | } |
| 484 | ; |
| 485 | |
| 486 | multiplicative_expression: |
| 487 | cast_expression |
| 488 | | multiplicative_expression multiplicative_operator cast_expression { |
| 489 | $$ = binary($2, $1, $3, &@2); |
| 490 | } |
| 491 | ; |
| 492 | |
| 493 | multiplicative_operator: |
| 494 | '*' |
| 495 | | '/' |
| 496 | | '%' |
| 497 | ; |
| 498 | |
| 499 | additive_expression: |
| 500 | multiplicative_expression |
| 501 | | additive_expression additive_operator multiplicative_expression { |
| 502 | $$ = binary($2, $1, $3, &@2); |
| 503 | } |
| 504 | ; |
| 505 | |
| 506 | additive_operator: |
| 507 | '+' |
| 508 | | '-' |
| 509 | ; |
| 510 | |
| 511 | shift_expression: |
| 512 | additive_expression |
| 513 | | shift_expression shift_operator additive_expression { |
| 514 | $$ = binary($2, $1, $3, &@2); |
| 515 | } |
| 516 | ; |
| 517 | |
| 518 | shift_operator: |
| 519 | "<<" |
| 520 | | ">>" |
| 521 | ; |
| 522 | |
| 523 | relational_expression: |
| 524 | shift_expression |
| 525 | | relational_expression relational_operator shift_expression { |
| 526 | $$ = binary($2, $1, $3, &@2); |
| 527 | } |
| 528 | ; |
| 529 | |
| 530 | relational_operator: |
| 531 | '<' |
| 532 | | '>' |
| 533 | | "<=" |
| 534 | | ">=" |
| 535 | ; |
| 536 | |
| 537 | equality_expression: |
| 538 | relational_expression |
| 539 | | equality_expression equality_operator relational_expression { |
| 540 | $$ = binary($2, $1, $3, &@2); |
| 541 | } |
| 542 | ; |
| 543 | |
| 544 | equality_operator: |
| 545 | "==" |
| 546 | | "!=" |
| 547 | ; |
| 548 | |
| 549 | AND_expression: |
| 550 | equality_expression |
| 551 | | AND_expression '&' equality_expression { |
| 552 | $$ = binary($2, $1, $3, &@2); |
| 553 | } |
| 554 | ; |
| 555 | |
| 556 | exclusive_OR_expression: |
| 557 | AND_expression |
| 558 | | exclusive_OR_expression '^' AND_expression { |
| 559 | $$ = binary($2, $1, $3, &@2); |
| 560 | } |
| 561 | ; |
| 562 | |
| 563 | inclusive_OR_expression: |
| 564 | exclusive_OR_expression |
| 565 | | inclusive_OR_expression '|' exclusive_OR_expression { |
| 566 | $$ = binary($2, $1, $3, &@2); |
| 567 | } |
| 568 | ; |
| 569 | |
| 570 | logical_AND_expression: |
| 571 | inclusive_OR_expression |
| 572 | | logical_AND_expression "&&" inclusive_OR_expression { |
| 573 | $$ = binary($2, $1, $3, &@2); |
| 574 | } |
| 575 | ; |
| 576 | |
| 577 | logical_OR_expression: |
| 578 | logical_AND_expression |
| 579 | | logical_OR_expression "||" logical_AND_expression { |
| 580 | $$ = binary($2, $1, $3, &@2); |
| 581 | } |
| 582 | ; |
| 583 | |
| 584 | conditional_expression: |
| 585 | logical_OR_expression |
| 586 | | logical_OR_expression '?' expression ':' conditional_expression { |
| 587 | $$ = binary('?', $1, binary(':', $3, $5, &@4), &@2); |
| 588 | } |
| 589 | ; |
| 590 | |
| 591 | assignment_expression: |
| 592 | conditional_expression |
| 593 | | unary_expression assignment_operator assignment_expression { |
| 594 | $$ = binary($2, $1, $3, &@2); |
| 595 | } |
| 596 | ; |
| 597 | |
| 598 | assignment_operator: |
| 599 | '=' |
| 600 | | "*=" |
| 601 | | "/=" |
| 602 | | "%=" |
| 603 | | "+=" |
| 604 | | "-=" |
| 605 | | "<<=" |
| 606 | | ">>=" |
| 607 | | "&=" |
| 608 | | "^=" |
| 609 | | "|=" |
| 610 | ; |
| 611 | |
| 612 | expression: |
| 613 | assignment_expression |
| 614 | | expression ',' assignment_expression { |
| 615 | $$ = binary($2, $1, $3, &@2); |
| 616 | } |
| 617 | ; |
| 618 | |
| 619 | expression_opt: |
| 620 | expression |
| 621 | | { $$ = 0; } |
| 622 | ; |
| 623 | |
| 624 | constant_expression: |
| 625 | conditional_expression |
| 626 | ; |
| 627 | |
| 628 | /* C99 6.7 declarations */ |
| 629 | |
| 630 | declaration: |
| 631 | declaration_specifiers init_declarator_list_opt ';' { |
| 632 | struct declaration_specifiers *ds = $1; |
| 633 | struct declarator *decl = $2; |
| 634 | |
| 635 | check_top_declaration_specifier(ds); |
| 636 | pop_declaration_specifiers(); |
| 637 | /* will have already done add_declarator() */ |
| 638 | NEW($$); |
| 639 | $$->declaration_specifiers = ds; |
| 640 | $$->declarator_list = decl; |
| 641 | $$->where = @1; |
| 642 | /* constraints checked by calling production */ |
| 643 | } |
| 644 | ; |
| 645 | |
| 646 | declaration_specifiers: |
| 647 | declaration_specifiers_definition { |
| 648 | push_declaration_specifiers($1); |
| 649 | $$ = $1; |
| 650 | } |
| 651 | ; |
| 652 | |
| 653 | declaration_specifiers_definition: |
| 654 | storage_class_specifier declaration_specifiers_opt { |
| 655 | struct declaration_specifiers ds = { |
| 656 | .type_specifiers = 0, |
| 657 | .storage_class_specifiers = $1, |
| 658 | .type_qualifiers = 0, |
| 659 | .function_specifiers = 0, |
| 660 | .name = 0, |
| 661 | .structure = 0, |
| 662 | .enumerators = 0, |
| 663 | .type = 0, |
| 664 | .enum_compat_type = 0 |
| 665 | }; |
| 666 | $$ = merge_declaration_specifiers($2, &ds); |
| 667 | } |
| 668 | | type_specifier declaration_specifiers_opt { |
| 669 | $$ = merge_declaration_specifiers($2, $1); |
| 670 | } |
| 671 | | type_qualifier declaration_specifiers_opt { |
| 672 | struct declaration_specifiers ds = { |
| 673 | .type_specifiers = 0, |
| 674 | .storage_class_specifiers = 0, |
| 675 | .type_qualifiers = $1, |
| 676 | .function_specifiers = 0, |
| 677 | .name = 0, |
| 678 | .structure = 0, |
| 679 | .enumerators = 0, |
| 680 | .type = 0, |
| 681 | .enum_compat_type = 0 |
| 682 | }; |
| 683 | $$ = merge_declaration_specifiers($2, &ds); |
| 684 | } |
| 685 | | function_specifier declaration_specifiers_opt { |
| 686 | struct declaration_specifiers ds = { |
| 687 | .type_specifiers = 0, |
| 688 | .storage_class_specifiers = 0, |
| 689 | .type_qualifiers = 0, |
| 690 | .function_specifiers = $1, |
| 691 | .name = 0, |
| 692 | .structure = 0, |
| 693 | .enumerators = 0, |
| 694 | .type = 0, |
| 695 | .enum_compat_type = 0 |
| 696 | }; |
| 697 | $$ = merge_declaration_specifiers($2, &ds); |
| 698 | } |
| 699 | | attribute_specifier declaration_specifiers_opt { |
| 700 | $$ = $2; |
| 701 | } |
| 702 | ; |
| 703 | |
| 704 | declaration_specifiers_opt: |
| 705 | declaration_specifiers_definition |
| 706 | | { |
| 707 | NEW($$); |
| 708 | } |
| 709 | ; |
| 710 | |
| 711 | init_declarator_list_opt: |
| 712 | init_declarator_list { $$ = $1->first; } |
| 713 | | { $$ = 0; } |
| 714 | ; |
| 715 | |
| 716 | init_declarator_list: |
| 717 | attributed_init_declarator { |
| 718 | NEW($$); |
| 719 | $$->first = $1; |
| 720 | $$->end = &$1->next; |
| 721 | } |
| 722 | | init_declarator_list ',' attribute_specifier_list attributed_init_declarator { |
| 723 | $$ = $1; |
| 724 | *$$->end = $4; |
| 725 | $$->end = &$4->next; |
| 726 | } |
| 727 | ; |
| 728 | |
| 729 | attributed_declarator: |
| 730 | declarator attribute_specifier_list { $$ = get_declarator($1, &@1); } |
| 731 | ; |
| 732 | |
| 733 | attributed_init_declarator: |
| 734 | attributed_declarator { |
| 735 | add_declaration($$ = $1); |
| 736 | } |
| 737 | | attributed_declarator '=' { |
| 738 | /* need to do this before we parse the initializer */ |
| 739 | add_declaration($1); |
| 740 | } initializer { |
| 741 | $$ = $1; |
| 742 | $$->initializer = $4; |
| 743 | } |
| 744 | ; |
| 745 | |
| 746 | /* C99 6.7.1 storage-class specifiers */ |
| 747 | |
| 748 | storage_class_specifier: |
| 749 | "typedef" |
| 750 | | "extern" |
| 751 | | "static" |
| 752 | | "auto" |
| 753 | | "register" |
| 754 | ; |
| 755 | |
| 756 | /* C99 6.7.2 type specifiers */ |
| 757 | |
| 758 | type_specifier: |
| 759 | basic_type_specifier { |
| 760 | NEW($$); |
| 761 | $$->type_specifiers = $1; |
| 762 | } |
| 763 | | struct_or_union_specifier { $$ = $1; } |
| 764 | | enum_specifier |
| 765 | | TYPEDEF_NAME { |
| 766 | NEW($$); |
| 767 | $$->type_specifiers = TS_TYPEDEF; |
| 768 | $$->name = $1.name; |
| 769 | $$->type = $1.declarator; |
| 770 | } |
| 771 | ; |
| 772 | |
| 773 | basic_type_specifier: |
| 774 | "void" |
| 775 | | "char" |
| 776 | | "short" |
| 777 | | "int" |
| 778 | | "long" |
| 779 | | "float" |
| 780 | | "double" |
| 781 | | "signed" |
| 782 | | "unsigned" |
| 783 | | "_Bool" |
| 784 | | "_Complex" |
| 785 | | "_Imaginary" |
| 786 | | GCC_VA_LIST |
| 787 | ; |
| 788 | |
| 789 | /* C99 6.2.7.1 structure and union specifiers */ |
| 790 | |
| 791 | /* shift/reduce conflict between |
| 792 | ID |
| 793 | and |
| 794 | ID '{' |
| 795 | resolved by shifting (which is right) |
| 796 | */ |
| 797 | struct_or_union_specifier: |
| 798 | struct_or_union identifier_opt '{' struct_declaration_list '}' attribute_specifier_list { |
| 799 | NEW($$); |
| 800 | $$->type_specifiers = $1 | TS_DEFINITION; |
| 801 | $$->name = $2.name; |
| 802 | $$->structure = $4->first; |
| 803 | } |
| 804 | | struct_or_union identifier { |
| 805 | NEW($$); |
| 806 | $$->type_specifiers = $1; |
| 807 | $$->name = $2.name; |
| 808 | } |
| 809 | | struct_or_union { /* shift/reduce conflict */ |
| 810 | inputerror(&@1, "structure must have a tag or a definition"); |
| 811 | NEW($$); |
| 812 | $$->type_specifiers = $1; |
| 813 | } |
| 814 | ; |
| 815 | |
| 816 | struct_or_union: |
| 817 | "struct" attribute_specifier_list { $$ = $1; } |
| 818 | | "union" attribute_specifier_list { $$ = $1; } |
| 819 | ; |
| 820 | |
| 821 | struct_declaration_list: |
| 822 | struct_declaration { |
| 823 | NEW($$); |
| 824 | $$->first = $1; |
| 825 | $$->end = &$1->next; |
| 826 | } |
| 827 | | struct_declaration_list struct_declaration { |
| 828 | $$ = $1; |
| 829 | *$$->end = $2; |
| 830 | $$->end = &$2->next; |
| 831 | } |
| 832 | ; |
| 833 | |
| 834 | struct_declaration: |
| 835 | specifier_qualifier_list struct_declarator_list ';' { |
| 836 | check_top_declaration_specifier($1); |
| 837 | pop_declaration_specifiers(); |
| 838 | NEW($$); |
| 839 | $$->declaration_specifiers = $1; |
| 840 | $$->declarator_list = $2->first; |
| 841 | declaration_constraints($$, dc_struct_member); |
| 842 | /* XXX perhaps add to a dictionary of struct/union declarations? */ |
| 843 | $$->where = @1; |
| 844 | } |
| 845 | ; |
| 846 | |
| 847 | specifier_qualifier_list: |
| 848 | specifier_qualifier_list_definition { |
| 849 | push_declaration_specifiers($1); |
| 850 | $$ = $1; |
| 851 | } |
| 852 | ; |
| 853 | |
| 854 | specifier_qualifier_list_definition: |
| 855 | type_specifier specifier_qualifier_list_opt { |
| 856 | $$ = merge_declaration_specifiers($2, $1); |
| 857 | } |
| 858 | | type_qualifier specifier_qualifier_list_opt { |
| 859 | struct declaration_specifiers ds = { |
| 860 | .type_specifiers = 0, |
| 861 | .storage_class_specifiers = 0, |
| 862 | .type_qualifiers = $1, |
| 863 | .function_specifiers = 0, |
| 864 | .name = 0, |
| 865 | .structure = 0, |
| 866 | .enumerators = 0, |
| 867 | .type = 0, |
| 868 | .enum_compat_type = 0 |
| 869 | }; |
| 870 | $$ = merge_declaration_specifiers($2, &ds); |
| 871 | } |
| 872 | | storage_class_specifier specifier_qualifier_list_opt { |
| 873 | inputerror(&@1, "storage class specifiers not allowed here"); |
| 874 | $$ = $2; |
| 875 | } |
| 876 | | function_specifier specifier_qualifier_list_opt { |
| 877 | inputerror(&@1, "function specifiers not allowed here"); |
| 878 | $$ = $2; |
| 879 | } |
| 880 | | attribute_specifier specifier_qualifier_list_opt { |
| 881 | $$ = $2; |
| 882 | } |
| 883 | ; |
| 884 | |
| 885 | specifier_qualifier_list_opt: |
| 886 | specifier_qualifier_list_definition |
| 887 | | { |
| 888 | NEW($$); |
| 889 | } |
| 890 | ; |
| 891 | |
| 892 | struct_declarator_list: |
| 893 | struct_declarator attribute_specifier_list { |
| 894 | NEW($$); |
| 895 | $$->first = $1; |
| 896 | $$->end = &$1->next; |
| 897 | } |
| 898 | | struct_declarator_list ',' attribute_specifier_list struct_declarator attribute_specifier_list { |
| 899 | $$ = $1; |
| 900 | *$$->end = $4; |
| 901 | $$->end = &$4->next; |
| 902 | } |
| 903 | ; |
| 904 | |
| 905 | struct_declarator: |
| 906 | attributed_declarator |
| 907 | | declarator_opt ':' constant_expression { |
| 908 | if(!($$ = $1)) { |
| 909 | NEW($$); |
| 910 | $$->declaration_specifiers = top_declaration_specifiers(); |
| 911 | } |
| 912 | $$->bits = $3; |
| 913 | $$->where = @2; |
| 914 | } |
| 915 | ; |
| 916 | |
| 917 | /* C99 6.7.2.2 enumeration specifiers */ |
| 918 | |
| 919 | enum_specifier: |
| 920 | enum identifier_opt '{' enumerator_list comma_opt '}' attribute_specifier_list { |
| 921 | NEW($$); |
| 922 | $$->type_specifiers = TS_ENUM | TS_DEFINITION; |
| 923 | $$->name = $2.name; |
| 924 | $$->enumerators = $4->first; |
| 925 | $$->enum_compat_type = TS_INT; /* XXX */ |
| 926 | if($5) |
| 927 | inputwarning(&@5, warn_compat, |
| 928 | "enumerator-list trailing comma not supported in C89 or C++"); |
| 929 | /* XXX pick type and fix up the declarators of all the enumerators */ |
| 930 | } |
| 931 | | enum identifier { |
| 932 | NEW($$); |
| 933 | $$->type_specifiers = TS_ENUM; |
| 934 | $$->name = $2.name; |
| 935 | } |
| 936 | ; |
| 937 | |
| 938 | enum: |
| 939 | "enum" attribute_specifier_list |
| 940 | ; |
| 941 | |
| 942 | enumerator_list: |
| 943 | registered_enumerator { |
| 944 | NEW($$); |
| 945 | $$->first = $1; |
| 946 | $$->end = &$1->next; |
| 947 | } |
| 948 | | enumerator_list ',' registered_enumerator { |
| 949 | *($$ = $1)->end = $3; |
| 950 | $$->end = &$3->next; |
| 951 | } |
| 952 | ; |
| 953 | |
| 954 | registered_enumerator: |
| 955 | enumerator { |
| 956 | struct declarator *d; |
| 957 | NEW(d); |
| 958 | d->name = $1->name; |
| 959 | d->where = $$->where; |
| 960 | NEW(d->declaration_specifiers); |
| 961 | d->declaration_specifiers->type_specifiers = TS_INT; |
| 962 | add_declaration(d); |
| 963 | $$ = $1; |
| 964 | $$->declarator = d; |
| 965 | } |
| 966 | ; |
| 967 | |
| 968 | enumerator: |
| 969 | identifier { |
| 970 | NEW($$); |
| 971 | $$->name = $1.name; |
| 972 | $$->where = @1; |
| 973 | } |
| 974 | | identifier '=' constant_expression { |
| 975 | NEW($$); |
| 976 | $$->name = $1.name; |
| 977 | $$->value = $3; |
| 978 | $$->where = @1; |
| 979 | } |
| 980 | ; |
| 981 | |
| 982 | /* C99 6.7.3 type qualifiers */ |
| 983 | |
| 984 | type_qualifier: |
| 985 | "const" |
| 986 | | "restrict" |
| 987 | | "volatile" |
| 988 | ; |
| 989 | |
| 990 | /* C99 6.7.4 function specifiers */ |
| 991 | |
| 992 | function_specifier: |
| 993 | "inline" |
| 994 | ; |
| 995 | |
| 996 | /* C99 6.7.5 declarators */ |
| 997 | |
| 998 | declarator_opt: |
| 999 | declarator { $$ = get_declarator($1, &@1); } |
| 1000 | | { $$ = 0; } |
| 1001 | ; |
| 1002 | |
| 1003 | declarator: |
| 1004 | pointer direct_declarator { |
| 1005 | $$ = $2; |
| 1006 | *$$->end = $1->first; |
| 1007 | $$->end = $1->end; |
| 1008 | } |
| 1009 | | direct_declarator |
| 1010 | ; |
| 1011 | |
| 1012 | direct_declarator: |
| 1013 | ID { |
| 1014 | NEW($$); |
| 1015 | $$->end = &$$->first; |
| 1016 | $$->name = $1.name; |
| 1017 | /* XXX warn about redeclaration */ |
| 1018 | } |
| 1019 | | '(' attribute_specifier_list declarator ')' { |
| 1020 | $$ = $3; |
| 1021 | } |
| 1022 | | direct_declarator '[' array_specifiers array_size ']' { |
| 1023 | struct declarator_type *t; |
| 1024 | |
| 1025 | NEW(t); |
| 1026 | $$ = $1; |
| 1027 | t->type = dt_array; |
| 1028 | t->type_qualifiers = $3->type_qualifiers; |
| 1029 | t->storage_class_specifiers = $3->storage_class_specifiers; |
| 1030 | if($4 == &expr_star) { |
| 1031 | t->u.array.size = 0; |
| 1032 | t->u.array.flags = AF_STAR; |
| 1033 | } else |
| 1034 | t->u.array.size = $4; |
| 1035 | t->where = @2; |
| 1036 | *$$->end = t; |
| 1037 | $$->end = &t->next; |
| 1038 | } |
| 1039 | | direct_declarator '(' ID_list_opt ')' { |
| 1040 | struct declarator_type *t; |
| 1041 | |
| 1042 | NEW(t); |
| 1043 | $$ = $1; |
| 1044 | t->type = dt_old_function; |
| 1045 | t->u.old_function.args = $3; |
| 1046 | t->where = @2; |
| 1047 | *$$->end = t; |
| 1048 | $$->end = &t->next; |
| 1049 | warn_old_style_function(&@2); |
| 1050 | } |
| 1051 | | direct_declarator '(' parameter_list variadic ')' { |
| 1052 | struct declarator_type *t; |
| 1053 | |
| 1054 | NEW(t); |
| 1055 | $$ = $1; |
| 1056 | t->type = dt_function; |
| 1057 | t->u.function.args = $3->first; |
| 1058 | t->u.function.variadic = $4; |
| 1059 | t->where = @2; |
| 1060 | *$$->end = t; |
| 1061 | $$->end = &t->next; |
| 1062 | } |
| 1063 | ; |
| 1064 | |
| 1065 | array_size: |
| 1066 | assignment_expression |
| 1067 | | '*' { $$ = &expr_star; } |
| 1068 | | { $$ = 0; } |
| 1069 | ; |
| 1070 | |
| 1071 | array_specifiers: |
| 1072 | type_qualifier_list_opt { |
| 1073 | NEW($$); |
| 1074 | } |
| 1075 | | "static" type_qualifier_list_opt { |
| 1076 | NEW($$); |
| 1077 | $$->type_qualifiers = $2; |
| 1078 | $$->storage_class_specifiers = SCS_STATIC; |
| 1079 | } |
| 1080 | | type_qualifier_list "static" { |
| 1081 | NEW($$); |
| 1082 | $$->type_qualifiers = $1; |
| 1083 | $$->storage_class_specifiers = SCS_STATIC; |
| 1084 | } |
| 1085 | ; |
| 1086 | |
| 1087 | variadic: |
| 1088 | ',' "..." { $$ = 1; } |
| 1089 | | { $$ = 0; } |
| 1090 | ; |
| 1091 | |
| 1092 | |
| 1093 | pointer_opt: |
| 1094 | pointer |
| 1095 | | { |
| 1096 | NEW($$); |
| 1097 | $$->end = &$$->first; |
| 1098 | } |
| 1099 | ; |
| 1100 | |
| 1101 | pointer: |
| 1102 | '*' type_qualifier_list_opt { |
| 1103 | struct declarator_type *t; |
| 1104 | |
| 1105 | NEW(t); |
| 1106 | t->type = dt_pointer; |
| 1107 | t->type_qualifiers = $2; |
| 1108 | t->where = @1; |
| 1109 | NEW($$); |
| 1110 | $$->first = t; |
| 1111 | $$->end = &t->next; |
| 1112 | } |
| 1113 | | '*' type_qualifier_list_opt pointer { |
| 1114 | struct declarator_type *t; |
| 1115 | |
| 1116 | NEW(t); |
| 1117 | t->type = dt_pointer; |
| 1118 | t->type_qualifiers = $2; |
| 1119 | t->where = @1; |
| 1120 | $$ = $3; |
| 1121 | *$$->end = t; |
| 1122 | $$->end = &t->next; |
| 1123 | } |
| 1124 | ; |
| 1125 | |
| 1126 | type_qualifier_list: |
| 1127 | type_qualifier |
| 1128 | | type_qualifier_list type_qualifier { $$ = $1 | $2; } |
| 1129 | | type_qualifier_list attribute_specifier |
| 1130 | ; |
| 1131 | |
| 1132 | type_qualifier_list_opt: |
| 1133 | type_qualifier_list |
| 1134 | | { $$ = 0; } |
| 1135 | ; |
| 1136 | |
| 1137 | parameter_list: |
| 1138 | parameter_declaration { |
| 1139 | NEW($$); |
| 1140 | $$->first = $1; |
| 1141 | $$->end = &$1->next; |
| 1142 | } |
| 1143 | | parameter_list ',' parameter_declaration { |
| 1144 | *$$->end = $3; |
| 1145 | $$->end = &$3->next; |
| 1146 | } |
| 1147 | ; |
| 1148 | |
| 1149 | parameter_declaration_specifiers: |
| 1150 | declaration_specifiers { |
| 1151 | $$ = $1; |
| 1152 | } |
| 1153 | ; |
| 1154 | |
| 1155 | /* declaration_constraints will be checked recursively once we know what |
| 1156 | * context we're really in (i.e. function-definition or not) */ |
| 1157 | parameter_declaration: |
| 1158 | parameter_declaration_specifiers declarator { |
| 1159 | struct declarator *d = get_declarator($2, &@2); |
| 1160 | check_top_declaration_specifier($1); |
| 1161 | pop_declaration_specifiers(); |
| 1162 | NEW($$); |
| 1163 | $$->declaration_specifiers = $1; |
| 1164 | $$->declarator_list = d; |
| 1165 | $$->where = @1; |
| 1166 | } |
| 1167 | | parameter_declaration_specifiers abstract_declarator_opt { |
| 1168 | struct declarator *d = get_declarator($2, $2->first ? &@2 : &@1); |
| 1169 | check_top_declaration_specifier($1); |
| 1170 | pop_declaration_specifiers(); |
| 1171 | NEW($$); |
| 1172 | $$->declaration_specifiers = $1; |
| 1173 | $$->declarator_list = d; |
| 1174 | $$->where = @1; |
| 1175 | } |
| 1176 | ; |
| 1177 | |
| 1178 | /* an old-style function declaration where all the parameter names match |
| 1179 | * typedef names is ambiguous - it could be a parameter list where all the |
| 1180 | * declarators are abstract. We resolve the ambiguity by assumiong that it is |
| 1181 | * the latter, modern form. */ |
| 1182 | ID_list_opt: |
| 1183 | ID_list { $$ = $1->first; } |
| 1184 | | { $$ = 0; } |
| 1185 | ; |
| 1186 | |
| 1187 | ID_list: |
| 1188 | ID { |
| 1189 | struct identifier_list *i; |
| 1190 | |
| 1191 | NEW(i); |
| 1192 | i->id = $1.name; |
| 1193 | /* XXX warn about redeclaration */ |
| 1194 | NEW($$); |
| 1195 | $$->first = i; |
| 1196 | $$->end = &i->next; |
| 1197 | } |
| 1198 | | ID_list ',' ID { |
| 1199 | struct identifier_list *i; |
| 1200 | |
| 1201 | NEW(i); |
| 1202 | i->id = $3.name; |
| 1203 | /* XXX warn about redeclaration */ |
| 1204 | *($$ = $1)->end = i; |
| 1205 | $$->end = &i->next; |
| 1206 | } |
| 1207 | ; |
| 1208 | |
| 1209 | /* C99 6.7.6 type names */ |
| 1210 | |
| 1211 | type_name: |
| 1212 | specifier_qualifier_list abstract_declarator_opt { |
| 1213 | struct declarator *d = get_declarator($2, $2->first ? &@2 : &@1); |
| 1214 | check_top_declaration_specifier($1); |
| 1215 | pop_declaration_specifiers(); |
| 1216 | NEW($$); |
| 1217 | $$->declaration_specifiers = $1; |
| 1218 | $$->declarator_list = d; |
| 1219 | $$->where = @1; |
| 1220 | /* declaration_constraints checked by calling production */ |
| 1221 | } |
| 1222 | ; |
| 1223 | |
| 1224 | direct_abstract_declarator: |
| 1225 | '(' attribute_specifier_list abstract_declarator ')' { |
| 1226 | $$ = $3; |
| 1227 | } |
| 1228 | | direct_abstract_declarator_opt '[' array_specifiers array_size ']' { |
| 1229 | struct declarator_type *t; |
| 1230 | |
| 1231 | NEW(t); |
| 1232 | $$ = $1; |
| 1233 | t->type = dt_array; |
| 1234 | t->type_qualifiers = $3->type_qualifiers; |
| 1235 | t->storage_class_specifiers = $3->storage_class_specifiers; |
| 1236 | if($4 == &expr_star) { |
| 1237 | t->u.array.size = 0; |
| 1238 | t->u.array.flags = AF_STAR; |
| 1239 | } else |
| 1240 | t->u.array.size = $4; |
| 1241 | t->where = @2; |
| 1242 | *$$->end = t; |
| 1243 | $$->end = &t->next; |
| 1244 | } |
| 1245 | | direct_abstract_declarator_opt '(' ')' { |
| 1246 | struct declarator_type *t; |
| 1247 | |
| 1248 | NEW(t); |
| 1249 | $$ = $1; |
| 1250 | t->type = dt_old_function; |
| 1251 | t->u.old_function.args = 0; |
| 1252 | t->where = @2; |
| 1253 | *$$->end = t; |
| 1254 | $$->end = &t->next; |
| 1255 | warn_old_style_function(&@2); |
| 1256 | } |
| 1257 | | direct_abstract_declarator_opt '(' parameter_list variadic ')' { |
| 1258 | struct declarator_type *t; |
| 1259 | |
| 1260 | NEW(t); |
| 1261 | $$ = $1; |
| 1262 | t->type = dt_function; |
| 1263 | t->u.function.args = $3->first; |
| 1264 | t->u.function.variadic = $4; |
| 1265 | t->where = @2; |
| 1266 | *$$->end = t; |
| 1267 | $$->end = &t->next; |
| 1268 | } |
| 1269 | ; |
| 1270 | |
| 1271 | direct_abstract_declarator_opt: |
| 1272 | direct_abstract_declarator |
| 1273 | | { |
| 1274 | NEW($$); |
| 1275 | $$->end = &$$->first; |
| 1276 | @$ = (struct location){path, line}; |
| 1277 | } |
| 1278 | ; |
| 1279 | |
| 1280 | abstract_declarator_opt: |
| 1281 | abstract_declarator |
| 1282 | | { |
| 1283 | NEW($$); |
| 1284 | $$->end = &$$->first; |
| 1285 | @$ = (struct location){path, line}; |
| 1286 | } |
| 1287 | ; |
| 1288 | |
| 1289 | abstract_declarator: |
| 1290 | pointer |
| 1291 | | pointer_opt direct_abstract_declarator { |
| 1292 | $$ = $2; |
| 1293 | *$$->end = $1->first; |
| 1294 | $$->end = $1->end; |
| 1295 | } |
| 1296 | ; |
| 1297 | |
| 1298 | /* C99 6.7.8 initializers */ |
| 1299 | |
| 1300 | initializer: |
| 1301 | assignment_expression { |
| 1302 | NEW($$); |
| 1303 | $$->type = in_expr; |
| 1304 | $$->u.expr = $1; |
| 1305 | } |
| 1306 | | '{' initializer_list comma_opt '}' { |
| 1307 | NEW($$); |
| 1308 | $$->type = in_list; |
| 1309 | $$->u.list = $2->first; |
| 1310 | } |
| 1311 | ; |
| 1312 | |
| 1313 | comma_opt: |
| 1314 | ',' { $$ = 1; } |
| 1315 | | { $$ = 0; } |
| 1316 | ; |
| 1317 | |
| 1318 | initializer_list: |
| 1319 | designated_initializer { |
| 1320 | NEW($$); |
| 1321 | $$->first = $1; |
| 1322 | $$->end = &$1->next; |
| 1323 | } |
| 1324 | | initializer_list ',' designated_initializer { |
| 1325 | *($$ = $1)->end = $3; |
| 1326 | $$->end = &$3->next; |
| 1327 | } |
| 1328 | ; |
| 1329 | |
| 1330 | designated_initializer: |
| 1331 | designator_list '=' initializer { |
| 1332 | ($$ = $3)->designator = $1->first; |
| 1333 | $$->syntax = des_c99; |
| 1334 | } |
| 1335 | | designator initializer { |
| 1336 | ($$ = $2)->designator = $1; |
| 1337 | $$->syntax = des_gcc_raw; |
| 1338 | inputwarning(&@1, warn_compat, |
| 1339 | "non-portable GNU C initializer designator"); |
| 1340 | } |
| 1341 | | ID ':' initializer { |
| 1342 | struct designator *d; |
| 1343 | |
| 1344 | NEW(d); |
| 1345 | d->type = des_field; |
| 1346 | d->u.name = $1.name; |
| 1347 | d->where = @1; |
| 1348 | ($$ = $3)->designator = d; |
| 1349 | $$->syntax = des_gcc_colon; |
| 1350 | inputwarning(&@1, warn_compat, |
| 1351 | "non-portable GNU C initializer designator"); |
| 1352 | } |
| 1353 | | initializer |
| 1354 | ; |
| 1355 | |
| 1356 | designator_list: |
| 1357 | designator { |
| 1358 | NEW($$); |
| 1359 | $$->first = $1; |
| 1360 | $$->end = &$1->next; |
| 1361 | } |
| 1362 | | designator_list designator { |
| 1363 | *($$ = $1)->end = $2; |
| 1364 | $$->end = &$2->next; |
| 1365 | } |
| 1366 | ; |
| 1367 | |
| 1368 | designator: |
| 1369 | '[' constant_expression ']' { |
| 1370 | NEW($$); |
| 1371 | $$->type = des_expr; |
| 1372 | $$->u.expr = $2; |
| 1373 | $$->where = @1; |
| 1374 | } |
| 1375 | | '.' identifier { |
| 1376 | NEW($$); |
| 1377 | $$->type = des_field; |
| 1378 | $$->u.name = $2.name; |
| 1379 | $$->where = @1; |
| 1380 | } |
| 1381 | ; |
| 1382 | |
| 1383 | /* C99 6.8 statements and blocks */ |
| 1384 | |
| 1385 | statement: |
| 1386 | identifier ':' attribute_specifier_list statement { |
| 1387 | NEW($$); |
| 1388 | $$->type = st_label; |
| 1389 | $$->u.label.label = $1.name; |
| 1390 | /* XXX warn about redeclaration */ |
| 1391 | $$->u.label.body = $4; |
| 1392 | $$->where = @1; |
| 1393 | } |
| 1394 | | "case" constant_expression ':' statement { |
| 1395 | NEW($$); |
| 1396 | $$->type = st_case; |
| 1397 | $$->u.case_.value = $2; |
| 1398 | $$->u.case_.body = $4; |
| 1399 | $$->where = @1; |
| 1400 | } |
| 1401 | | "default" ':' statement { |
| 1402 | NEW($$); |
| 1403 | $$->type = st_default; |
| 1404 | $$->u.default_ = $3; |
| 1405 | $$->where = @1; |
| 1406 | } |
| 1407 | | "if" '(' expression ')' statement else_part_opt { |
| 1408 | NEW($$); |
| 1409 | $$->type = st_if; |
| 1410 | $$->u.if_.cond = $3; |
| 1411 | $$->u.if_.true = $5; |
| 1412 | $$->u.if_.false = $6; |
| 1413 | $$->where = @1; |
| 1414 | } |
| 1415 | | "switch" '(' expression ')' statement { |
| 1416 | NEW($$); |
| 1417 | $$->type = st_switch; |
| 1418 | $$->u.switch_.cond = $3; |
| 1419 | $$->u.switch_.body = $5; |
| 1420 | $$->where = @1; |
| 1421 | } |
| 1422 | | expression_opt ';' { |
| 1423 | NEW($$); |
| 1424 | $$->type = st_expression; |
| 1425 | $$->u.expression = $1; |
| 1426 | $$->where = $1 ? @1 : @2; |
| 1427 | } |
| 1428 | | "while" '(' expression ')' statement { |
| 1429 | NEW($$); |
| 1430 | $$->type = st_while; |
| 1431 | $$->u.while_.cond = $3; |
| 1432 | $$->u.while_.body = $5; |
| 1433 | $$->where = @1; |
| 1434 | } |
| 1435 | | "do" statement "while" '(' expression ')' ';' { |
| 1436 | NEW($$); |
| 1437 | $$->type = st_do; |
| 1438 | $$->u.while_.cond = $5; |
| 1439 | $$->u.while_.body = $2; |
| 1440 | $$->where = @1; |
| 1441 | } |
| 1442 | | "for" '(' expression_opt ';' |
| 1443 | expression_opt ';' |
| 1444 | expression_opt ')' statement { |
| 1445 | NEW($$); |
| 1446 | $$->type = st_for; |
| 1447 | $$->u.for_.init = $3; |
| 1448 | $$->u.for_.cond = $5; |
| 1449 | $$->u.for_.iter = $7; |
| 1450 | $$->u.for_.body = $9; |
| 1451 | $$->where = @1; |
| 1452 | } |
| 1453 | | "for" '(' |
| 1454 | { enter_scope(); } |
| 1455 | declaration |
| 1456 | expression_opt ';' |
| 1457 | expression_opt ')' statement { |
| 1458 | NEW($$); |
| 1459 | $$->type = st_for_declaration; |
| 1460 | $$->u.for_declaration.init = $4; |
| 1461 | $$->u.for_declaration.cond = $5; |
| 1462 | $$->u.for_declaration.iter = $7; |
| 1463 | $$->u.for_declaration.body = $9; |
| 1464 | $$->where = @1; |
| 1465 | exit_scope(); |
| 1466 | } |
| 1467 | | "goto" identifier ';' { |
| 1468 | NEW($$); |
| 1469 | $$->type = st_goto; |
| 1470 | $$->u.goto_ = $2.name; |
| 1471 | $$->where = @1; |
| 1472 | } |
| 1473 | | "continue" ';' { |
| 1474 | NEW($$); |
| 1475 | $$->type = st_continue; |
| 1476 | $$->where = @1; |
| 1477 | } |
| 1478 | | "break" ';' { |
| 1479 | NEW($$); |
| 1480 | $$->type = st_break; |
| 1481 | $$->where = @1; |
| 1482 | } |
| 1483 | | "return" expression_opt ';' { |
| 1484 | NEW($$); |
| 1485 | $$->type = st_return; |
| 1486 | $$->u.expression = $2; |
| 1487 | $$->where = @1; |
| 1488 | } |
| 1489 | | '{' { enter_scope(); } block_item_list_opt '}' { |
| 1490 | NEW($$); |
| 1491 | $$->type = st_compound; |
| 1492 | $$->u.compound.body = $3->first; |
| 1493 | $$->where = @1; |
| 1494 | $$->u.compound.endwhere = @4; |
| 1495 | /*$$->u.compound.scope = scope;*/ |
| 1496 | exit_scope(); |
| 1497 | } |
| 1498 | ; |
| 1499 | |
| 1500 | /* scope handling for function bodies is done by function_definition */ |
| 1501 | function_body: |
| 1502 | '{' block_item_list_opt '}' { |
| 1503 | NEW($$); |
| 1504 | $$->type = st_compound; |
| 1505 | $$->u.compound.body = $2->first; |
| 1506 | $$->where = @1; |
| 1507 | $$->u.compound.endwhere = @3; |
| 1508 | /*$$->u.compound.scope = scope;*/ |
| 1509 | } |
| 1510 | ; |
| 1511 | |
| 1512 | block_item_list_opt: |
| 1513 | block_item_list_opt block_item { |
| 1514 | *($$ = $1)->end = $2; |
| 1515 | $$->end = &$2->next; |
| 1516 | } |
| 1517 | | { |
| 1518 | NEW($$); |
| 1519 | $$->end = &$$->first; |
| 1520 | } |
| 1521 | ; |
| 1522 | |
| 1523 | block_item: |
| 1524 | declaration { |
| 1525 | NEW($$); |
| 1526 | $$->type = st_declaration; |
| 1527 | $$->u.declaration = $1; |
| 1528 | $$->where = @1; |
| 1529 | declaration_constraints($1, dc_block_scope); |
| 1530 | } |
| 1531 | | statement |
| 1532 | ; |
| 1533 | |
| 1534 | /* shift/reduce conflict here */ |
| 1535 | else_part_opt: |
| 1536 | "else" statement { $$ = $2; } |
| 1537 | | { $$ = 0; } |
| 1538 | ; |
| 1539 | |
| 1540 | /* C99 6.9 external definitions */ |
| 1541 | |
| 1542 | translation_unit: |
| 1543 | external_declaration { |
| 1544 | NEW($$); |
| 1545 | translation_unit = $$->first = $1; |
| 1546 | $$->end = &$1->next; |
| 1547 | } |
| 1548 | | translation_unit external_declaration { |
| 1549 | $$ = $1; |
| 1550 | *$$->end = $2; |
| 1551 | $$->end = &$2->next; |
| 1552 | } |
| 1553 | | translation_unit ';' { |
| 1554 | inputerror(&@2, "redundant semicolon at top level"); |
| 1555 | } |
| 1556 | ; |
| 1557 | |
| 1558 | external_declaration: |
| 1559 | declaration { |
| 1560 | NEW($$); |
| 1561 | $$->type = ed_declaration; |
| 1562 | $$->u.declaration = $1; |
| 1563 | declaration_constraints($1, dc_file_scope); |
| 1564 | } |
| 1565 | | function_definition { |
| 1566 | NEW($$); |
| 1567 | $$->type = ed_function_definition; |
| 1568 | $$->u.function_definition = $1; |
| 1569 | /* constraints checked in function_definition (i.e. before errors |
| 1570 | * from the function body) */ |
| 1571 | } |
| 1572 | ; |
| 1573 | |
| 1574 | /* C99 6.9.1 function definitions */ |
| 1575 | |
| 1576 | function_definition: |
| 1577 | declaration_specifiers attributed_declarator { |
| 1578 | check_top_declaration_specifier($1); |
| 1579 | pop_declaration_specifiers(); |
| 1580 | declarator_constraints($1, $2, dc_function_definition, 0); |
| 1581 | NEW($<declaration>$); |
| 1582 | $<declaration>$->declaration_specifiers = $1; |
| 1583 | $<declaration>$->declarator_list = $2; |
| 1584 | $<declaration>$->where = @1; |
| 1585 | add_declaration($2); |
| 1586 | enter_scope(); |
| 1587 | { |
| 1588 | struct declarator *d; |
| 1589 | NEW(d); |
| 1590 | NEW(d->declaration_specifiers); |
| 1591 | NEW(d->declarator_type); |
| 1592 | d->name = xstrdup("__PRETTY_FUNCTION__"); |
| 1593 | d->declaration_specifiers->type_qualifiers = TQ_CONST; |
| 1594 | d->declaration_specifiers->type_specifiers = TS_CHAR; |
| 1595 | d->declarator_type->type = dt_pointer; |
| 1596 | add_declaration(d); |
| 1597 | } |
| 1598 | /* we had better be in the right scope before parsing the declaration |
| 1599 | * list for old style functions */ |
| 1600 | } declaration_list_opt { |
| 1601 | struct declaration *decl; |
| 1602 | struct declarator *d = 0; /* quieten compiler */ |
| 1603 | |
| 1604 | /* inject function args into scope */ |
| 1605 | if($2->declarator_type) switch($2->declarator_type->type) { |
| 1606 | case dt_function: |
| 1607 | if(!is_void_args($2->declarator_type)) { |
| 1608 | for(decl = $2->declarator_type->u.function.args; |
| 1609 | decl; |
| 1610 | decl = decl->next) { |
| 1611 | decl->declarator_list->flags |= DF_PARAM; |
| 1612 | add_declaration(decl->declarator_list); |
| 1613 | } |
| 1614 | } |
| 1615 | if($4->first) |
| 1616 | inputerror(&@4, "declaration-list not required for new-style function definitions"); |
| 1617 | break; |
| 1618 | case dt_old_function: |
| 1619 | if($2->declarator_type->u.old_function.args) { |
| 1620 | struct identifier_list *i; |
| 1621 | |
| 1622 | for(i = $2->declarator_type->u.old_function.args; |
| 1623 | i; |
| 1624 | i = i->next) { |
| 1625 | for(decl = $4->first; |
| 1626 | decl; |
| 1627 | decl = decl->next) |
| 1628 | for(d = decl->declarator_list; |
| 1629 | d; |
| 1630 | d = d->next) |
| 1631 | if(!strcmp(d->name, i->id)) |
| 1632 | break; |
| 1633 | if(d) { |
| 1634 | d->flags |= DF_PARAM; |
| 1635 | add_declaration(d); |
| 1636 | } else { |
| 1637 | /* default to int */ |
| 1638 | NEW(d); |
| 1639 | d->name = i->id; |
| 1640 | NEW(d->declaration_specifiers); |
| 1641 | d->declaration_specifiers->type_specifiers = TS_INT; |
| 1642 | d->flags = DF_PARAM; |
| 1643 | add_declaration(d); |
| 1644 | } |
| 1645 | } |
| 1646 | } |
| 1647 | /* check that all the identifiers in the list are actually |
| 1648 | * parameters */ |
| 1649 | for(decl = $4->first; decl; decl = decl->next) |
| 1650 | for(d = decl->declarator_list; |
| 1651 | d; |
| 1652 | d = d->next) { |
| 1653 | struct identifier_list *i; |
| 1654 | |
| 1655 | for(i = $2->declarator_type->u.old_function.args; i; i = i->next) |
| 1656 | if(!strcmp(d->name, i->id)) |
| 1657 | break; |
| 1658 | if(!i) |
| 1659 | inputerror(&d->where, "'%s' is not a parameter", d->name); |
| 1660 | } |
| 1661 | break; |
| 1662 | |
| 1663 | default: /* quieten compiler */ |
| 1664 | break; |
| 1665 | } |
| 1666 | } function_body { |
| 1667 | NEW($$); |
| 1668 | $$->declaration = $<declaration>3; |
| 1669 | $$->args = $4->first; |
| 1670 | $$->body = $6; |
| 1671 | exit_scope(); |
| 1672 | } |
| 1673 | ; |
| 1674 | |
| 1675 | declaration_list_opt: |
| 1676 | declaration_list_opt declaration { |
| 1677 | *($$ = $1)->end = $2; |
| 1678 | $$->end = &$2->next; |
| 1679 | } |
| 1680 | | { |
| 1681 | NEW($$); |
| 1682 | $$->end = &$$->first; |
| 1683 | } |
| 1684 | ; |
| 1685 | |
| 1686 | /* gcc.info attribute syntax */ |
| 1687 | |
| 1688 | attribute_specifier_list: |
| 1689 | attribute_specifier_list attribute_specifier |
| 1690 | | |
| 1691 | ; |
| 1692 | |
| 1693 | attribute_specifier: |
| 1694 | ATTRIBUTE '(' '(' attribute_list ')' ')' { |
| 1695 | static int attr_warning; |
| 1696 | if(!attr_warning++) |
| 1697 | inputwarning(&@1, warn_compat, "GNU C attributes are ignored"); |
| 1698 | } |
| 1699 | ; |
| 1700 | |
| 1701 | attribute_list: |
| 1702 | attribute_list attribute |
| 1703 | | |
| 1704 | ; |
| 1705 | |
| 1706 | attribute: |
| 1707 | CONST { } |
| 1708 | | identifier { } |
| 1709 | | identifier '(' |
| 1710 | { suppress_errors(); } |
| 1711 | argument_expression_list_opt |
| 1712 | { restore_errors(); } |
| 1713 | ')' { } |
| 1714 | ; |
| 1715 | |
| 1716 | %% |
| 1717 | |
| 1718 | /* |
| 1719 | Local Variables: |
| 1720 | c-basic-offset:2 |
| 1721 | comment-column:40 |
| 1722 | fill-column:79 |
| 1723 | End: |
| 1724 | */ |