11 #include "type_hash.h"
13 #include "adt/bitfiddle.h"
14 #include "adt/error.h"
15 #include "adt/array.h"
17 //#define PRINT_TOKENS
18 //#define ABORT_ON_ERROR
19 #define MAX_LOOKAHEAD 2
23 declaration_t *old_declaration;
25 unsigned short namespace;
29 static token_t lookahead_buffer[MAX_LOOKAHEAD];
30 static int lookahead_bufpos;
31 static stack_entry_t *environment_stack = NULL;
32 static stack_entry_t *label_stack = NULL;
33 static context_t *global_context = NULL;
34 static context_t *context = NULL;
35 static declaration_t *last_declaration = NULL;
36 static declaration_t *current_function = NULL;
37 static struct obstack temp_obst;
38 static bool found_error;
40 static type_t *type_int = NULL;
41 static type_t *type_uint = NULL;
42 static type_t *type_long_double = NULL;
43 static type_t *type_double = NULL;
44 static type_t *type_float = NULL;
45 static type_t *type_const_char = NULL;
46 static type_t *type_string = NULL;
47 static type_t *type_void = NULL;
48 static type_t *type_size_t = NULL;
49 static type_t *type_ptrdiff_t = NULL;
51 static statement_t *parse_compound_statement(void);
52 static statement_t *parse_statement(void);
54 static expression_t *parse_sub_expression(unsigned precedence);
55 static expression_t *parse_expression(void);
56 static type_t *parse_typename(void);
58 #define STORAGE_CLASSES \
65 #define TYPE_QUALIFIERS \
71 #ifdef PROVIDE_COMPLEX
72 #define COMPLEX_SPECIFIERS \
75 #define COMPLEX_SPECIFIERS
78 #ifdef PROVIDE_IMAGINARY
79 #define IMAGINARY_SPECIFIERS \
82 #define IMAGINARY_SPECIFIERS
85 #define TYPE_SPECIFIERS \
103 #define DECLARATION_START \
108 #define TYPENAME_START \
112 static inline void *allocate_ast_zero(size_t size)
114 void *res = allocate_ast(size);
115 memset(res, 0, size);
119 static inline void *allocate_type_zero(size_t size)
121 void *res = obstack_alloc(type_obst, size);
122 memset(res, 0, size);
126 static inline void free_type(void *type)
128 obstack_free(type_obst, type);
132 * returns the top element of the environment stack
134 static inline size_t environment_top(void)
136 return ARR_LEN(environment_stack);
139 static inline size_t label_top(void)
141 return ARR_LEN(label_stack);
146 static inline void next_token(void)
148 token = lookahead_buffer[lookahead_bufpos];
149 lookahead_buffer[lookahead_bufpos] = lexer_token;
152 lookahead_bufpos = (lookahead_bufpos+1) % MAX_LOOKAHEAD;
155 print_token(stderr, &token);
156 fprintf(stderr, "\n");
160 static inline const token_t *look_ahead(int num)
162 assert(num > 0 && num <= MAX_LOOKAHEAD);
163 int pos = (lookahead_bufpos+num-1) % MAX_LOOKAHEAD;
164 return & lookahead_buffer[pos];
167 #define eat(token_type) do { assert(token.type == token_type); next_token(); } while(0)
169 static void error(void)
172 #ifdef ABORT_ON_ERROR
177 static void parser_print_prefix_pos(const source_position_t source_position)
179 fputs(source_position.input_name, stderr);
181 fprintf(stderr, "%d", source_position.linenr);
185 static void parser_print_error_prefix_pos(
186 const source_position_t source_position)
188 parser_print_prefix_pos(source_position);
189 fputs("error: ", stderr);
193 static void parser_print_error_prefix(void)
195 parser_print_error_prefix_pos(token.source_position);
198 static void parse_error(const char *message)
200 parser_print_error_prefix();
201 fprintf(stderr, "parse error: %s\n", message);
204 static void parse_warning(const char *message)
206 parser_print_prefix_pos(token.source_position);
207 fprintf(stderr, "warning: %s\n", message);
210 static void parse_error_expected(const char *message, ...)
215 if(message != NULL) {
216 parser_print_error_prefix();
217 fprintf(stderr, "%s\n", message);
219 parser_print_error_prefix();
220 fputs("Parse error: got ", stderr);
221 print_token(stderr, &token);
222 fputs(", expected ", stderr);
224 va_start(args, message);
225 token_type_t token_type = va_arg(args, token_type_t);
226 while(token_type != 0) {
230 fprintf(stderr, ", ");
232 print_token_type(stderr, token_type);
233 token_type = va_arg(args, token_type_t);
236 fprintf(stderr, "\n");
239 static void type_error(const char *msg, const source_position_t source_position,
242 parser_print_error_prefix_pos(source_position);
243 fprintf(stderr, "%s, but found type ", msg);
249 static void type_error_incompatible(const char *msg,
250 const source_position_t source_position, type_t *type1, type_t *type2)
252 parser_print_error_prefix_pos(source_position);
253 fprintf(stderr, "%s, incompatible types: ", msg);
255 fprintf(stderr, " - ");
257 fprintf(stderr, ")\n");
261 static void eat_block(void)
263 if(token.type == '{')
266 while(token.type != '}') {
267 if(token.type == T_EOF)
269 if(token.type == '{') {
278 static void eat_statement(void)
280 while(token.type != ';') {
281 if(token.type == T_EOF)
283 if(token.type == '}')
285 if(token.type == '{') {
294 static void eat_brace(void)
296 if(token.type == '(')
299 while(token.type != ')') {
300 if(token.type == T_EOF)
302 if(token.type == ')' || token.type == ';' || token.type == '}') {
305 if(token.type == '(') {
309 if(token.type == '{') {
318 #define expect(expected) \
319 if(UNLIKELY(token.type != (expected))) { \
320 parse_error_expected(NULL, (expected), 0); \
326 #define expect_void(expected) \
327 if(UNLIKELY(token.type != (expected))) { \
328 parse_error_expected(NULL, (expected), 0); \
334 static void set_context(context_t *new_context)
336 context = new_context;
338 last_declaration = new_context->declarations;
339 if(last_declaration != NULL) {
340 while(last_declaration->next != NULL) {
341 last_declaration = last_declaration->next;
347 * called when we find a 2nd declarator for an identifier we already have a
350 static bool is_compatible_declaration (declaration_t *declaration,
351 declaration_t *previous)
353 /* TODO: not correct yet */
354 return declaration->type == previous->type;
357 static declaration_t *get_declaration(symbol_t *symbol, namespace_t namespace)
359 declaration_t *declaration = symbol->declaration;
360 for( ; declaration != NULL; declaration = declaration->symbol_next) {
361 if(declaration->namespace == namespace)
368 static const char *get_namespace_prefix(namespace_t namespace)
371 case NAMESPACE_NORMAL:
373 case NAMESPACE_UNION:
375 case NAMESPACE_STRUCT:
379 case NAMESPACE_LABEL:
382 panic("invalid namespace found");
386 * pushs an environment_entry on the environment stack and links the
387 * corresponding symbol to the new entry
389 static declaration_t *stack_push(stack_entry_t **stack_ptr,
390 declaration_t *declaration,
391 context_t *parent_context)
393 symbol_t *symbol = declaration->symbol;
394 namespace_t namespace = declaration->namespace;
396 /* a declaration should be only pushed once */
397 assert(declaration->parent_context == NULL);
398 declaration->parent_context = parent_context;
400 declaration_t *previous_declaration = get_declaration(symbol, namespace);
401 assert(declaration != previous_declaration);
402 if(previous_declaration != NULL
403 && previous_declaration->parent_context == context) {
404 if(!is_compatible_declaration(declaration, previous_declaration)) {
405 parser_print_error_prefix_pos(declaration->source_position);
406 fprintf(stderr, "definition of symbol %s%s with type ",
407 get_namespace_prefix(namespace), symbol->string);
409 print_type(declaration->type);
411 parser_print_error_prefix_pos(
412 previous_declaration->source_position);
413 fprintf(stderr, "is incompatible with previous declaration "
415 print_type(previous_declaration->type);
418 return previous_declaration;
421 /* remember old declaration */
423 entry.symbol = symbol;
424 entry.old_declaration = symbol->declaration;
425 entry.namespace = namespace;
426 ARR_APP1(*stack_ptr, entry);
428 /* replace/add declaration into declaration list of the symbol */
429 if(symbol->declaration == NULL) {
430 symbol->declaration = declaration;
432 declaration_t *iter_last = NULL;
433 declaration_t *iter = symbol->declaration;
434 for( ; iter != NULL; iter_last = iter, iter = iter->symbol_next) {
435 /* replace an entry? */
436 if(iter->namespace == namespace) {
437 if(iter_last == NULL) {
438 symbol->declaration = declaration;
440 iter_last->symbol_next = declaration;
442 declaration->symbol_next = iter->symbol_next;
447 assert(iter_last->symbol_next == NULL);
448 iter_last->symbol_next = declaration;
455 static declaration_t *environment_push(declaration_t *declaration)
457 assert(declaration->source_position.input_name != NULL);
458 return stack_push(&environment_stack, declaration, context);
461 static declaration_t *label_push(declaration_t *declaration)
463 return stack_push(&label_stack, declaration, ¤t_function->context);
467 * pops symbols from the environment stack until @p new_top is the top element
469 static void stack_pop_to(stack_entry_t **stack_ptr, size_t new_top)
471 stack_entry_t *stack = *stack_ptr;
472 size_t top = ARR_LEN(stack);
475 assert(new_top <= top);
479 for(i = top; i > new_top; --i) {
480 stack_entry_t *entry = & stack[i - 1];
482 declaration_t *old_declaration = entry->old_declaration;
483 symbol_t *symbol = entry->symbol;
484 namespace_t namespace = entry->namespace;
486 /* replace/remove declaration */
487 declaration_t *declaration = symbol->declaration;
488 assert(declaration != NULL);
489 if(declaration->namespace == namespace) {
490 if(old_declaration == NULL) {
491 symbol->declaration = declaration->symbol_next;
493 symbol->declaration = old_declaration;
494 assert(old_declaration->symbol_next ==
495 declaration->symbol_next);
498 for(; declaration != NULL; declaration = declaration->symbol_next) {
499 declaration_t *symbol_next = declaration->symbol_next;
500 if(symbol_next->namespace == namespace) {
501 declaration->symbol_next = old_declaration;
502 assert(old_declaration->symbol_next
503 == symbol_next->symbol_next);
507 assert(declaration != NULL);
511 ARR_SHRINKLEN(*stack_ptr, (int) new_top);
514 static void environment_pop_to(size_t new_top)
516 stack_pop_to(&environment_stack, new_top);
519 static void label_pop_to(size_t new_top)
521 stack_pop_to(&label_stack, new_top);
525 static int get_rank(const type_t *type)
527 /* The C-standard allows promoting to int or unsigned int (see § 7.2.2
528 * and esp. footnote 108). However we can't fold constants (yet), so we
529 * can't decide wether unsigned int is possible, while int always works.
530 * (unsigned int would be preferable when possible... for stuff like
531 * struct { enum { ... } bla : 4; } ) */
532 if(type->type == TYPE_ENUM)
533 return ATOMIC_TYPE_INT;
535 assert(type->type == TYPE_ATOMIC);
536 atomic_type_t *atomic_type = (atomic_type_t*) type;
537 atomic_type_type_t atype = atomic_type->atype;
541 static type_t *promote_integer(type_t *type)
543 if(get_rank(type) < ATOMIC_TYPE_INT)
549 static expression_t *create_cast_expression(expression_t *expression,
552 unary_expression_t *cast = allocate_ast_zero(sizeof(cast[0]));
554 cast->expression.type = EXPR_UNARY;
555 cast->type = UNEXPR_CAST;
556 cast->value = expression;
557 cast->expression.datatype = dest_type;
559 return (expression_t*) cast;
562 static expression_t *create_implicit_cast(expression_t *expression,
565 type_t *source_type = expression->datatype;
567 if(source_type == NULL)
570 source_type = skip_typeref(source_type);
571 dest_type = skip_typeref(dest_type);
573 if(source_type == dest_type)
576 if(dest_type->type == TYPE_ATOMIC) {
577 if(source_type->type != TYPE_ATOMIC)
578 panic("casting of non-atomic types not implemented yet");
580 if(is_type_floating(dest_type) && !is_type_scalar(source_type)) {
581 type_error_incompatible("can't cast types",
582 expression->source_position,
583 source_type, dest_type);
587 return create_cast_expression(expression, dest_type);
589 if(dest_type->type == TYPE_POINTER) {
590 if(source_type->type == TYPE_POINTER) {
591 if(!pointers_compatible(source_type, dest_type)) {
592 type_error_incompatible("can't implicitely cast types",
593 expression->source_position,
594 source_type, dest_type);
596 return create_cast_expression(expression, dest_type);
601 panic("casting of non-atomic types not implemented yet");
604 static void semantic_assign(type_t *orig_type_left, expression_t **right,
607 type_t *orig_type_right = (*right)->datatype;
609 if(orig_type_right == NULL)
612 type_t *type_left = skip_typeref(orig_type_left);
613 type_t *type_right = skip_typeref(orig_type_right);
615 if(type_left == type_right) {
617 } else if(is_type_arithmetic(type_left) && is_type_arithmetic(type_right)) {
618 *right = create_implicit_cast(*right, type_left);
619 } else if(type_left->type == TYPE_POINTER
620 && type_right->type == TYPE_POINTER) {
623 /* TODO: improve error message */
624 parser_print_error_prefix();
625 fprintf(stderr, "incompatible types in %s\n", context);
626 parser_print_error_prefix();
627 print_type(type_left);
628 fputs(" <- ", stderr);
629 print_type(type_right);
635 static expression_t *parse_constant_expression(void)
637 /* start parsing at precedence 7 (conditional expression) */
638 return parse_sub_expression(7);
641 static expression_t *parse_assignment_expression(void)
643 /* start parsing at precedence 2 (assignment expression) */
644 return parse_sub_expression(2);
647 static void parse_compound_type_entries(void);
648 static declaration_t *parse_declarator(storage_class_t storage_class,
649 type_t *type, int may_be_abstract);
650 static declaration_t *record_declaration(declaration_t *declaration);
652 typedef struct declaration_specifiers_t declaration_specifiers_t;
653 struct declaration_specifiers_t {
654 storage_class_t storage_class;
658 static const char *parse_string_literals(void)
660 assert(token.type == T_STRING_LITERAL);
661 const char *result = token.v.string;
665 while(token.type == T_STRING_LITERAL) {
666 result = concat_strings(result, token.v.string);
673 static void parse_attributes(void)
677 case T___attribute__:
685 parse_error("EOF while parsing attribute");
703 if(token.type != T_STRING_LITERAL) {
704 parse_error_expected("while parsing assembler attribute",
709 parse_string_literals();
714 goto attributes_finished;
722 static designator_t *parse_designation(void)
724 if(token.type != '[' && token.type != '.')
727 designator_t *result = NULL;
728 designator_t *last = NULL;
731 designator_t *designator;
734 designator = allocate_ast_zero(sizeof(designator[0]));
736 designator->array_access = parse_constant_expression();
740 designator = allocate_ast_zero(sizeof(designator[0]));
742 if(token.type != T_IDENTIFIER) {
743 parse_error_expected("problem while parsing designator",
747 designator->symbol = token.v.symbol;
755 assert(designator != NULL);
757 last->next = designator;
765 static initializer_t *parse_initializer_list(type_t *type);
767 static initializer_t *parse_initializer(type_t *type)
769 designator_t *designator = parse_designation();
771 initializer_t *result;
772 if(token.type == '{') {
773 result = parse_initializer_list(type);
775 result = allocate_ast_zero(sizeof(result[0]));
776 result->type = INITIALIZER_VALUE;
777 result->v.value = parse_assignment_expression();
780 semantic_assign(type, &result->v.value, "initializer");
783 result->designator = designator;
788 static initializer_t *parse_initializer_list(type_t *type)
795 initializer_t *result = allocate_ast_zero(sizeof(result[0]));
796 result->type = INITIALIZER_LIST;
798 initializer_t *last = NULL;
800 initializer_t *initializer = parse_initializer(NULL);
802 last->next = initializer;
804 result->v.list = initializer;
808 if(token.type == '}')
811 if(token.type != ',') {
812 parse_error_expected("problem while parsing initializer list",
819 if(token.type == '}')
828 static declaration_t *parse_compound_type_specifier(bool is_struct)
836 symbol_t *symbol = NULL;
837 declaration_t *declaration = NULL;
839 if(token.type == T_IDENTIFIER) {
840 symbol = token.v.symbol;
844 declaration = get_declaration(symbol, NAMESPACE_STRUCT);
846 declaration = get_declaration(symbol, NAMESPACE_UNION);
848 } else if(token.type != '{') {
850 parse_error_expected("problem while parsing struct type specifier",
851 T_IDENTIFIER, '{', 0);
853 parse_error_expected("problem while parsing union type specifier",
854 T_IDENTIFIER, '{', 0);
860 if(declaration == NULL) {
861 declaration = allocate_type_zero(sizeof(declaration[0]));
864 declaration->namespace = NAMESPACE_STRUCT;
866 declaration->namespace = NAMESPACE_UNION;
868 declaration->source_position = token.source_position;
869 declaration->symbol = symbol;
872 if(token.type == '{') {
873 if(declaration->init.is_defined) {
874 assert(symbol != NULL);
875 parser_print_error_prefix();
876 fprintf(stderr, "multiple definition of %s %s\n",
877 is_struct ? "struct" : "union", symbol->string);
878 declaration->context.declarations = NULL;
880 record_declaration(declaration);
881 declaration->init.is_defined = true;
883 int top = environment_top();
884 context_t *last_context = context;
885 set_context(& declaration->context);
887 parse_compound_type_entries();
890 assert(context == & declaration->context);
891 set_context(last_context);
892 environment_pop_to(top);
898 static void parse_enum_entries(void)
902 if(token.type == '}') {
904 parse_error("empty enum not allowed");
909 declaration_t *entry = allocate_ast_zero(sizeof(entry[0]));
911 if(token.type != T_IDENTIFIER) {
912 parse_error_expected("problem while parsing enum entry",
917 entry->storage_class = STORAGE_CLASS_ENUM_ENTRY;
918 entry->symbol = token.v.symbol;
919 entry->source_position = token.source_position;
922 if(token.type == '=') {
924 entry->init.initializer = parse_initializer(type_int);
927 record_declaration(entry);
929 if(token.type != ',')
932 } while(token.type != '}');
937 static declaration_t *parse_enum_specifier(void)
941 declaration_t *declaration;
944 if(token.type == T_IDENTIFIER) {
945 symbol = token.v.symbol;
948 declaration = get_declaration(symbol, NAMESPACE_ENUM);
949 } else if(token.type != '{') {
950 parse_error_expected("problem while parsing enum type specifier",
951 T_IDENTIFIER, '{', 0);
958 if(declaration == NULL) {
959 declaration = allocate_type_zero(sizeof(declaration[0]));
961 declaration->namespace = NAMESPACE_ENUM;
962 declaration->source_position = token.source_position;
963 declaration->symbol = symbol;
966 if(token.type == '{') {
967 if(declaration->init.is_defined) {
968 parser_print_error_prefix();
969 fprintf(stderr, "multiple definitions of enum %s\n",
972 record_declaration(declaration);
973 declaration->init.is_defined = 1;
975 parse_enum_entries();
983 * if a symbol is a typedef to another type, return true
985 static bool is_typedef_symbol(symbol_t *symbol)
987 declaration_t *declaration = get_declaration(symbol, NAMESPACE_NORMAL);
988 if(declaration == NULL
989 || declaration->storage_class != STORAGE_CLASS_TYPEDEF)
995 static type_t *parse_typeof(void)
1003 expression_t *expression = NULL;
1006 switch(token.type) {
1007 case T___extension__:
1008 /* this can be a prefix to a typename or an expression */
1009 /* we simply eat it now. */
1012 } while(token.type == T___extension__);
1016 if(is_typedef_symbol(token.v.symbol)) {
1017 type = parse_typename();
1019 expression = parse_expression();
1020 type = expression->datatype;
1025 type = parse_typename();
1029 expression = parse_expression();
1030 type = expression->datatype;
1036 typeof_type_t *typeof = allocate_type_zero(sizeof(typeof[0]));
1037 typeof->type.type = TYPE_TYPEOF;
1038 typeof->expression = expression;
1039 typeof->typeof_type = type;
1041 return (type_t*) typeof;
1045 SPECIFIER_SIGNED = 1 << 0,
1046 SPECIFIER_UNSIGNED = 1 << 1,
1047 SPECIFIER_LONG = 1 << 2,
1048 SPECIFIER_INT = 1 << 3,
1049 SPECIFIER_DOUBLE = 1 << 4,
1050 SPECIFIER_CHAR = 1 << 5,
1051 SPECIFIER_SHORT = 1 << 6,
1052 SPECIFIER_LONG_LONG = 1 << 7,
1053 SPECIFIER_FLOAT = 1 << 8,
1054 SPECIFIER_BOOL = 1 << 9,
1055 SPECIFIER_VOID = 1 << 10,
1056 #ifdef PROVIDE_COMPLEX
1057 SPECIFIER_COMPLEX = 1 << 11,
1059 #ifdef PROVIDE_IMAGINARY
1060 SPECIFIER_IMAGINARY = 1 << 12,
1064 static type_t *create_builtin_type(symbol_t *symbol)
1066 builtin_type_t *type = allocate_type_zero(sizeof(type[0]));
1067 type->type.type = TYPE_BUILTIN;
1068 type->symbol = symbol;
1070 type->real_type = type_int;
1072 return (type_t*) type;
1075 static type_t *get_typedef_type(symbol_t *symbol)
1077 declaration_t *declaration = get_declaration(symbol, NAMESPACE_NORMAL);
1078 if(declaration == NULL
1079 || declaration->storage_class != STORAGE_CLASS_TYPEDEF)
1082 typedef_type_t *typedef_type = allocate_type_zero(sizeof(typedef_type[0]));
1083 typedef_type->type.type = TYPE_TYPEDEF;
1084 typedef_type->declaration = declaration;
1086 return (type_t*) typedef_type;
1089 static void parse_declaration_specifiers(declaration_specifiers_t *specifiers)
1091 type_t *type = NULL;
1092 unsigned type_qualifiers = 0;
1093 unsigned type_specifiers = 0;
1097 switch(token.type) {
1100 #define MATCH_STORAGE_CLASS(token, class) \
1102 if(specifiers->storage_class != STORAGE_CLASS_NONE) { \
1103 parse_error("multiple storage classes in declaration " \
1106 specifiers->storage_class = class; \
1110 MATCH_STORAGE_CLASS(T_typedef, STORAGE_CLASS_TYPEDEF)
1111 MATCH_STORAGE_CLASS(T_extern, STORAGE_CLASS_EXTERN)
1112 MATCH_STORAGE_CLASS(T_static, STORAGE_CLASS_STATIC)
1113 MATCH_STORAGE_CLASS(T_auto, STORAGE_CLASS_AUTO)
1114 MATCH_STORAGE_CLASS(T_register, STORAGE_CLASS_REGISTER)
1116 /* type qualifiers */
1117 #define MATCH_TYPE_QUALIFIER(token, qualifier) \
1119 type_qualifiers |= qualifier; \
1123 MATCH_TYPE_QUALIFIER(T_const, TYPE_QUALIFIER_CONST);
1124 MATCH_TYPE_QUALIFIER(T_restrict, TYPE_QUALIFIER_RESTRICT);
1125 MATCH_TYPE_QUALIFIER(T_volatile, TYPE_QUALIFIER_VOLATILE);
1126 MATCH_TYPE_QUALIFIER(T_inline, TYPE_QUALIFIER_INLINE);
1128 case T___extension__:
1133 /* type specifiers */
1134 #define MATCH_SPECIFIER(token, specifier, name) \
1137 if(type_specifiers & specifier) { \
1138 parse_error("multiple " name " type specifiers given"); \
1140 type_specifiers |= specifier; \
1144 MATCH_SPECIFIER(T_void, SPECIFIER_VOID, "void")
1145 MATCH_SPECIFIER(T_char, SPECIFIER_CHAR, "char")
1146 MATCH_SPECIFIER(T_short, SPECIFIER_SHORT, "short")
1147 MATCH_SPECIFIER(T_int, SPECIFIER_INT, "int")
1148 MATCH_SPECIFIER(T_float, SPECIFIER_FLOAT, "float")
1149 MATCH_SPECIFIER(T_double, SPECIFIER_DOUBLE, "double")
1150 MATCH_SPECIFIER(T_signed, SPECIFIER_SIGNED, "signed")
1151 MATCH_SPECIFIER(T_unsigned, SPECIFIER_UNSIGNED, "unsigned")
1152 MATCH_SPECIFIER(T__Bool, SPECIFIER_BOOL, "_Bool")
1153 #ifdef PROVIDE_COMPLEX
1154 MATCH_SPECIFIER(T__Complex, SPECIFIER_COMPLEX, "_Complex")
1156 #ifdef PROVIDE_IMAGINARY
1157 MATCH_SPECIFIER(T__Imaginary, SPECIFIER_IMAGINARY, "_Imaginary")
1161 if(type_specifiers & SPECIFIER_LONG_LONG) {
1162 parse_error("multiple type specifiers given");
1163 } else if(type_specifiers & SPECIFIER_LONG) {
1164 type_specifiers |= SPECIFIER_LONG_LONG;
1166 type_specifiers |= SPECIFIER_LONG;
1170 /* TODO: if type != NULL for the following rules should issue
1173 compound_type_t *compound_type
1174 = allocate_type_zero(sizeof(compound_type[0]));
1175 compound_type->type.type = TYPE_COMPOUND_STRUCT;
1176 compound_type->declaration = parse_compound_type_specifier(true);
1178 type = (type_t*) compound_type;
1182 compound_type_t *compound_type
1183 = allocate_type_zero(sizeof(compound_type[0]));
1184 compound_type->type.type = TYPE_COMPOUND_UNION;
1185 compound_type->declaration = parse_compound_type_specifier(false);
1187 type = (type_t*) compound_type;
1191 enum_type_t *enum_type = allocate_type_zero(sizeof(enum_type[0]));
1192 enum_type->type.type = TYPE_ENUM;
1193 enum_type->declaration = parse_enum_specifier();
1195 type = (type_t*) enum_type;
1199 type = parse_typeof();
1201 case T___builtin_va_list:
1202 type = create_builtin_type(token.v.symbol);
1206 case T___attribute__:
1211 case T_IDENTIFIER: {
1212 type_t *typedef_type = get_typedef_type(token.v.symbol);
1214 if(typedef_type == NULL)
1215 goto finish_specifiers;
1218 type = typedef_type;
1222 /* function specifier */
1224 goto finish_specifiers;
1231 atomic_type_type_t atomic_type;
1233 /* match valid basic types */
1234 switch(type_specifiers) {
1235 case SPECIFIER_VOID:
1236 atomic_type = ATOMIC_TYPE_VOID;
1238 case SPECIFIER_CHAR:
1239 atomic_type = ATOMIC_TYPE_CHAR;
1241 case SPECIFIER_SIGNED | SPECIFIER_CHAR:
1242 atomic_type = ATOMIC_TYPE_SCHAR;
1244 case SPECIFIER_UNSIGNED | SPECIFIER_CHAR:
1245 atomic_type = ATOMIC_TYPE_UCHAR;
1247 case SPECIFIER_SHORT:
1248 case SPECIFIER_SIGNED | SPECIFIER_SHORT:
1249 case SPECIFIER_SHORT | SPECIFIER_INT:
1250 case SPECIFIER_SIGNED | SPECIFIER_SHORT | SPECIFIER_INT:
1251 atomic_type = ATOMIC_TYPE_SHORT;
1253 case SPECIFIER_UNSIGNED | SPECIFIER_SHORT:
1254 case SPECIFIER_UNSIGNED | SPECIFIER_SHORT | SPECIFIER_INT:
1255 atomic_type = ATOMIC_TYPE_USHORT;
1258 case SPECIFIER_SIGNED:
1259 case SPECIFIER_SIGNED | SPECIFIER_INT:
1260 atomic_type = ATOMIC_TYPE_INT;
1262 case SPECIFIER_UNSIGNED:
1263 case SPECIFIER_UNSIGNED | SPECIFIER_INT:
1264 atomic_type = ATOMIC_TYPE_UINT;
1266 case SPECIFIER_LONG:
1267 case SPECIFIER_SIGNED | SPECIFIER_LONG:
1268 case SPECIFIER_LONG | SPECIFIER_INT:
1269 case SPECIFIER_SIGNED | SPECIFIER_LONG | SPECIFIER_INT:
1270 atomic_type = ATOMIC_TYPE_LONG;
1272 case SPECIFIER_UNSIGNED | SPECIFIER_LONG:
1273 case SPECIFIER_UNSIGNED | SPECIFIER_LONG | SPECIFIER_INT:
1274 atomic_type = ATOMIC_TYPE_ULONG;
1276 case SPECIFIER_LONG | SPECIFIER_LONG_LONG:
1277 case SPECIFIER_SIGNED | SPECIFIER_LONG | SPECIFIER_LONG_LONG:
1278 case SPECIFIER_LONG | SPECIFIER_LONG_LONG | SPECIFIER_INT:
1279 case SPECIFIER_SIGNED | SPECIFIER_LONG | SPECIFIER_LONG_LONG
1281 atomic_type = ATOMIC_TYPE_LONGLONG;
1283 case SPECIFIER_UNSIGNED | SPECIFIER_LONG | SPECIFIER_LONG_LONG:
1284 case SPECIFIER_UNSIGNED | SPECIFIER_LONG | SPECIFIER_LONG_LONG
1286 atomic_type = ATOMIC_TYPE_ULONGLONG;
1288 case SPECIFIER_FLOAT:
1289 atomic_type = ATOMIC_TYPE_FLOAT;
1291 case SPECIFIER_DOUBLE:
1292 atomic_type = ATOMIC_TYPE_DOUBLE;
1294 case SPECIFIER_LONG | SPECIFIER_DOUBLE:
1295 atomic_type = ATOMIC_TYPE_LONG_DOUBLE;
1297 case SPECIFIER_BOOL:
1298 atomic_type = ATOMIC_TYPE_BOOL;
1300 #ifdef PROVIDE_COMPLEX
1301 case SPECIFIER_FLOAT | SPECIFIER_COMPLEX:
1302 atomic_type = ATOMIC_TYPE_FLOAT_COMPLEX;
1304 case SPECIFIER_DOUBLE | SPECIFIER_COMPLEX:
1305 atomic_type = ATOMIC_TYPE_DOUBLE_COMPLEX;
1307 case SPECIFIER_LONG | SPECIFIER_DOUBLE | SPECIFIER_COMPLEX:
1308 atomic_type = ATOMIC_TYPE_LONG_DOUBLE_COMPLEX;
1311 #ifdef PROVIDE_IMAGINARY
1312 case SPECIFIER_FLOAT | SPECIFIER_IMAGINARY:
1313 atomic_type = ATOMIC_TYPE_FLOAT_IMAGINARY;
1315 case SPECIFIER_DOUBLE | SPECIFIER_IMAGINARY:
1316 atomic_type = ATOMIC_TYPE_DOUBLE_IMAGINARY;
1318 case SPECIFIER_LONG | SPECIFIER_DOUBLE | SPECIFIER_IMAGINARY:
1319 atomic_type = ATOMIC_TYPE_LONG_DOUBLE_IMAGINARY;
1323 /* invalid specifier combination, give an error message */
1324 if(type_specifiers == 0) {
1326 parse_warning("no type specifiers in declaration (using int)");
1327 atomic_type = ATOMIC_TYPE_INT;
1330 parse_error("no type specifiers given in declaration");
1332 } else if((type_specifiers & SPECIFIER_SIGNED) &&
1333 (type_specifiers & SPECIFIER_UNSIGNED)) {
1334 parse_error("signed and unsigned specifiers gives");
1335 } else if(type_specifiers & (SPECIFIER_SIGNED | SPECIFIER_UNSIGNED)) {
1336 parse_error("only integer types can be signed or unsigned");
1338 parse_error("multiple datatypes in declaration");
1340 atomic_type = ATOMIC_TYPE_INVALID;
1343 atomic_type_t *atype = allocate_type_zero(sizeof(atype[0]));
1344 atype->type.type = TYPE_ATOMIC;
1345 atype->atype = atomic_type;
1348 type = (type_t*) atype;
1350 if(type_specifiers != 0) {
1351 parse_error("multiple datatypes in declaration");
1355 type->qualifiers = type_qualifiers;
1357 type_t *result = typehash_insert(type);
1358 if(newtype && result != (type_t*) type) {
1362 specifiers->type = result;
1365 static type_qualifier_t parse_type_qualifiers(void)
1367 type_qualifier_t type_qualifiers = 0;
1370 switch(token.type) {
1371 /* type qualifiers */
1372 MATCH_TYPE_QUALIFIER(T_const, TYPE_QUALIFIER_CONST);
1373 MATCH_TYPE_QUALIFIER(T_restrict, TYPE_QUALIFIER_RESTRICT);
1374 MATCH_TYPE_QUALIFIER(T_volatile, TYPE_QUALIFIER_VOLATILE);
1375 MATCH_TYPE_QUALIFIER(T_inline, TYPE_QUALIFIER_INLINE);
1378 return type_qualifiers;
1383 static void parse_identifier_list(void)
1386 if(token.type != T_IDENTIFIER) {
1387 parse_error_expected("problem while parsing parameter identifier "
1388 "list", T_IDENTIFIER, 0);
1392 if(token.type != ',')
1398 static declaration_t *parse_parameter(void)
1400 declaration_specifiers_t specifiers;
1401 memset(&specifiers, 0, sizeof(specifiers));
1403 parse_declaration_specifiers(&specifiers);
1405 declaration_t *declaration = parse_declarator(specifiers.storage_class,
1406 specifiers.type, 1);
1408 /* TODO check declaration constraints for parameters */
1409 if(declaration->storage_class == STORAGE_CLASS_TYPEDEF) {
1410 parse_error("typedef not allowed in parameter list");
1416 static declaration_t *parse_parameters(function_type_t *type)
1418 if(token.type == T_IDENTIFIER) {
1419 symbol_t *symbol = token.v.symbol;
1420 if(!is_typedef_symbol(symbol)) {
1422 parse_identifier_list();
1427 if(token.type == ')') {
1428 type->unspecified_parameters = 1;
1431 if(token.type == T_void && look_ahead(1)->type == ')') {
1436 declaration_t *declarations = NULL;
1437 declaration_t *declaration;
1438 declaration_t *last_declaration = NULL;
1439 function_parameter_t *parameter;
1440 function_parameter_t *last_parameter = NULL;
1443 switch(token.type) {
1447 return declarations;
1450 case T___extension__:
1452 declaration = parse_parameter();
1454 parameter = allocate_type_zero(sizeof(parameter[0]));
1455 parameter->type = declaration->type;
1457 if(last_parameter != NULL) {
1458 last_declaration->next = declaration;
1459 last_parameter->next = parameter;
1461 type->parameters = parameter;
1462 declarations = declaration;
1464 last_parameter = parameter;
1465 last_declaration = declaration;
1469 return declarations;
1471 if(token.type != ',')
1472 return declarations;
1482 } construct_type_type_t;
1484 typedef struct construct_type_t construct_type_t;
1485 struct construct_type_t {
1486 construct_type_type_t type;
1487 construct_type_t *next;
1490 typedef struct parsed_pointer_t parsed_pointer_t;
1491 struct parsed_pointer_t {
1492 construct_type_t construct_type;
1493 type_qualifier_t type_qualifiers;
1496 typedef struct construct_function_type_t construct_function_type_t;
1497 struct construct_function_type_t {
1498 construct_type_t construct_type;
1499 function_type_t *function_type;
1502 typedef struct parsed_array_t parsed_array_t;
1503 struct parsed_array_t {
1504 construct_type_t construct_type;
1505 type_qualifier_t type_qualifiers;
1511 typedef struct construct_base_type_t construct_base_type_t;
1512 struct construct_base_type_t {
1513 construct_type_t construct_type;
1517 static construct_type_t *parse_pointer_declarator(void)
1521 parsed_pointer_t *pointer = obstack_alloc(&temp_obst, sizeof(pointer[0]));
1522 memset(pointer, 0, sizeof(pointer[0]));
1523 pointer->construct_type.type = CONSTRUCT_POINTER;
1524 pointer->type_qualifiers = parse_type_qualifiers();
1526 return (construct_type_t*) pointer;
1529 static construct_type_t *parse_array_declarator(void)
1533 parsed_array_t *array = obstack_alloc(&temp_obst, sizeof(array[0]));
1534 memset(array, 0, sizeof(array[0]));
1535 array->construct_type.type = CONSTRUCT_ARRAY;
1537 if(token.type == T_static) {
1538 array->is_static = true;
1542 type_qualifier_t type_qualifiers = parse_type_qualifiers();
1543 if(type_qualifiers != 0) {
1544 if(token.type == T_static) {
1545 array->is_static = true;
1549 array->type_qualifiers = type_qualifiers;
1551 if(token.type == '*' && look_ahead(1)->type == ']') {
1552 array->is_variable = true;
1554 } else if(token.type != ']') {
1555 array->size = parse_assignment_expression();
1560 return (construct_type_t*) array;
1563 static construct_type_t *parse_function_declarator(declaration_t *declaration)
1567 function_type_t *type = allocate_type_zero(sizeof(type[0]));
1568 type->type.type = TYPE_FUNCTION;
1570 declaration_t *parameters = parse_parameters(type);
1571 if(declaration != NULL) {
1572 declaration->context.declarations = parameters;
1575 construct_function_type_t *construct_function_type =
1576 obstack_alloc(&temp_obst, sizeof(construct_function_type[0]));
1577 memset(construct_function_type, 0, sizeof(construct_function_type[0]));
1578 construct_function_type->construct_type.type = CONSTRUCT_FUNCTION;
1579 construct_function_type->function_type = type;
1583 return (construct_type_t*) construct_function_type;
1586 static construct_type_t *parse_inner_declarator(declaration_t *declaration,
1587 int may_be_abstract)
1589 construct_type_t *result = NULL;
1590 construct_type_t *last = NULL;
1592 while(token.type == '*') {
1593 construct_type_t *type = parse_pointer_declarator();
1602 /* TODO: find out if this is correct */
1605 construct_type_t *inner_types = NULL;
1607 switch(token.type) {
1609 if(declaration == NULL) {
1610 parse_error("no identifier expected in typename");
1612 declaration->symbol = token.v.symbol;
1613 declaration->source_position = token.source_position;
1619 inner_types = parse_inner_declarator(declaration, may_be_abstract);
1625 parse_error_expected("problem while parsing declarator", T_IDENTIFIER,
1630 construct_type_t *type;
1631 switch(token.type) {
1633 type = parse_function_declarator(declaration);
1636 type = parse_array_declarator();
1639 goto declarator_finished;
1650 declarator_finished:
1653 if(inner_types != NULL) {
1655 last->next = inner_types;
1657 result = inner_types;
1665 static type_t *construct_declarator_type(construct_type_t *construct_list,
1668 construct_type_t *iter = construct_list;
1669 for( ; iter != NULL; iter = iter->next) {
1670 parsed_pointer_t *parsed_pointer;
1671 parsed_array_t *parsed_array;
1672 construct_function_type_t *construct_function_type;
1673 function_type_t *function_type;
1674 pointer_type_t *pointer_type;
1675 array_type_t *array_type;
1677 switch(iter->type) {
1678 case CONSTRUCT_INVALID:
1679 panic("invalid type construction found");
1680 case CONSTRUCT_FUNCTION:
1681 construct_function_type = (construct_function_type_t*) iter;
1682 function_type = construct_function_type->function_type;
1684 function_type->result_type = type;
1685 type = (type_t*) function_type;
1688 case CONSTRUCT_POINTER:
1689 parsed_pointer = (parsed_pointer_t*) iter;
1690 pointer_type = allocate_type_zero(sizeof(pointer_type[0]));
1692 pointer_type->type.type = TYPE_POINTER;
1693 pointer_type->points_to = type;
1694 pointer_type->type.qualifiers = parsed_pointer->type_qualifiers;
1695 type = (type_t*) pointer_type;
1698 case CONSTRUCT_ARRAY:
1699 parsed_array = (parsed_array_t*) iter;
1700 array_type = allocate_type_zero(sizeof(array_type[0]));
1702 array_type->type.type = TYPE_ARRAY;
1703 array_type->element_type = type;
1704 array_type->type.qualifiers = parsed_array->type_qualifiers;
1705 array_type->is_static = parsed_array->is_static;
1706 array_type->is_variable = parsed_array->is_variable;
1707 array_type->size = parsed_array->size;
1708 type = (type_t*) array_type;
1712 type_t *hashed_type = typehash_insert((type_t*) type);
1713 if(hashed_type != type) {
1722 static declaration_t *parse_declarator(storage_class_t storage_class,
1723 type_t *type, int may_be_abstract)
1725 declaration_t *declaration = allocate_ast_zero(sizeof(declaration[0]));
1726 declaration->storage_class = storage_class;
1728 construct_type_t *construct_type
1729 = parse_inner_declarator(declaration, may_be_abstract);
1730 declaration->type = construct_declarator_type(construct_type, type);
1732 if(construct_type != NULL) {
1733 obstack_free(&temp_obst, construct_type);
1739 static type_t *parse_abstract_declarator(type_t *base_type)
1741 construct_type_t *construct_type = parse_inner_declarator(NULL, 1);
1743 type_t *result = construct_declarator_type(construct_type, base_type);
1744 if(construct_type != NULL) {
1745 obstack_free(&temp_obst, construct_type);
1751 static declaration_t *record_declaration(declaration_t *declaration)
1753 assert(context != NULL);
1755 symbol_t *symbol = declaration->symbol;
1756 if(symbol != NULL) {
1757 declaration_t *alias = environment_push(declaration);
1758 if(alias != declaration)
1761 declaration->parent_context = context;
1764 if(last_declaration != NULL) {
1765 last_declaration->next = declaration;
1767 context->declarations = declaration;
1769 last_declaration = declaration;
1774 static void parser_error_multiple_definition(declaration_t *previous,
1775 declaration_t *declaration)
1777 parser_print_error_prefix_pos(declaration->source_position);
1778 fprintf(stderr, "multiple definition of symbol '%s'\n",
1779 declaration->symbol->string);
1780 parser_print_error_prefix_pos(previous->source_position);
1781 fprintf(stderr, "this is the location of the previous "
1786 static void parse_init_declarators(const declaration_specifiers_t *specifiers)
1789 declaration_t *ndeclaration
1790 = parse_declarator(specifiers->storage_class, specifiers->type, 0);
1792 declaration_t *declaration = record_declaration(ndeclaration);
1793 if(token.type == '=') {
1796 /* TODO: check that this is an allowed type (no function type) */
1798 if(declaration->init.initializer != NULL) {
1799 parser_error_multiple_definition(declaration, ndeclaration);
1802 ndeclaration->init.initializer = parse_initializer(declaration->type);
1803 } else if(token.type == '{') {
1804 if(declaration->type->type != TYPE_FUNCTION) {
1805 parser_print_error_prefix();
1806 fprintf(stderr, "Declarator ");
1807 print_type_ext(declaration->type, declaration->symbol, NULL);
1808 fprintf(stderr, " has a body but is not a function type.\n");
1813 if(declaration->init.statement != NULL) {
1814 parser_error_multiple_definition(declaration, ndeclaration);
1816 if(ndeclaration != declaration) {
1817 memcpy(&declaration->context, &ndeclaration->context,
1818 sizeof(declaration->context));
1821 int top = environment_top();
1822 context_t *last_context = context;
1823 set_context(&declaration->context);
1825 /* push function parameters */
1826 declaration_t *parameter = declaration->context.declarations;
1827 for( ; parameter != NULL; parameter = parameter->next) {
1828 environment_push(parameter);
1831 int label_stack_top = label_top();
1832 declaration_t *old_current_function = current_function;
1833 current_function = declaration;
1835 statement_t *statement = parse_compound_statement();
1837 assert(current_function == declaration);
1838 current_function = old_current_function;
1839 label_pop_to(label_stack_top);
1841 assert(context == &declaration->context);
1842 set_context(last_context);
1843 environment_pop_to(top);
1845 declaration->init.statement = statement;
1849 if(token.type != ',')
1856 static void parse_struct_declarators(const declaration_specifiers_t *specifiers)
1859 if(token.type == ':') {
1861 parse_constant_expression();
1862 /* TODO (bitfields) */
1864 declaration_t *declaration
1865 = parse_declarator(specifiers->storage_class,
1866 specifiers->type, 1);
1868 /* TODO: check constraints for struct declarations */
1869 /* TODO: check for doubled fields */
1870 record_declaration(declaration);
1872 if(token.type == ':') {
1874 parse_constant_expression();
1875 /* TODO (bitfields) */
1879 if(token.type != ',')
1886 static void parse_compound_type_entries(void)
1890 while(token.type != '}' && token.type != T_EOF) {
1891 declaration_specifiers_t specifiers;
1892 memset(&specifiers, 0, sizeof(specifiers));
1893 parse_declaration_specifiers(&specifiers);
1895 parse_struct_declarators(&specifiers);
1897 if(token.type == T_EOF) {
1898 parse_error("unexpected error while parsing struct");
1903 static void parse_declaration(void)
1905 source_position_t source_position = token.source_position;
1907 declaration_specifiers_t specifiers;
1908 memset(&specifiers, 0, sizeof(specifiers));
1909 parse_declaration_specifiers(&specifiers);
1911 if(token.type == ';') {
1914 declaration_t *declaration = allocate_ast_zero(sizeof(declaration[0]));
1916 declaration->type = specifiers.type;
1917 declaration->storage_class = specifiers.storage_class;
1918 declaration->source_position = source_position;
1919 record_declaration(declaration);
1922 parse_init_declarators(&specifiers);
1925 static type_t *parse_typename(void)
1927 declaration_specifiers_t specifiers;
1928 memset(&specifiers, 0, sizeof(specifiers));
1929 parse_declaration_specifiers(&specifiers);
1930 if(specifiers.storage_class != STORAGE_CLASS_NONE) {
1931 /* TODO: improve error message, user does probably not know what a
1932 * storage class is...
1934 parse_error("typename may not have a storage class");
1937 type_t *result = parse_abstract_declarator(specifiers.type);
1945 typedef expression_t* (*parse_expression_function) (unsigned precedence);
1946 typedef expression_t* (*parse_expression_infix_function) (unsigned precedence,
1947 expression_t *left);
1949 typedef struct expression_parser_function_t expression_parser_function_t;
1950 struct expression_parser_function_t {
1951 unsigned precedence;
1952 parse_expression_function parser;
1953 unsigned infix_precedence;
1954 parse_expression_infix_function infix_parser;
1957 expression_parser_function_t expression_parsers[T_LAST_TOKEN];
1959 static expression_t *expected_expression_error(void)
1961 parser_print_error_prefix();
1962 fprintf(stderr, "expected expression, got token ");
1963 print_token(stderr, & token);
1964 fprintf(stderr, "\n");
1966 expression_t *expression = allocate_ast_zero(sizeof(expression[0]));
1967 expression->type = EXPR_INVALID;
1973 static expression_t *parse_string_const(void)
1975 string_literal_t *cnst = allocate_ast_zero(sizeof(cnst[0]));
1977 cnst->expression.type = EXPR_STRING_LITERAL;
1978 cnst->expression.datatype = type_string;
1979 cnst->value = parse_string_literals();
1981 return (expression_t*) cnst;
1984 static expression_t *parse_int_const(void)
1986 const_t *cnst = allocate_ast_zero(sizeof(cnst[0]));
1988 cnst->expression.type = EXPR_CONST;
1989 cnst->expression.datatype = type_int;
1990 cnst->v.int_value = token.v.intvalue;
1994 return (expression_t*) cnst;
1997 static expression_t *parse_float_const(void)
1999 const_t *cnst = allocate_ast_zero(sizeof(cnst[0]));
2001 cnst->expression.type = EXPR_CONST;
2002 cnst->expression.datatype = type_double;
2003 cnst->v.float_value = token.v.floatvalue;
2007 return (expression_t*) cnst;
2010 static declaration_t *create_implicit_function(symbol_t *symbol,
2011 const source_position_t source_position)
2013 function_type_t *function_type
2014 = allocate_type_zero(sizeof(function_type[0]));
2016 function_type->type.type = TYPE_FUNCTION;
2017 function_type->result_type = type_int;
2018 function_type->unspecified_parameters = true;
2020 type_t *type = typehash_insert((type_t*) function_type);
2021 if(type != (type_t*) function_type) {
2022 free_type(function_type);
2025 declaration_t *declaration = allocate_ast_zero(sizeof(declaration[0]));
2027 declaration->storage_class = STORAGE_CLASS_EXTERN;
2028 declaration->type = type;
2029 declaration->symbol = symbol;
2030 declaration->source_position = source_position;
2032 /* prepend the implicit definition to the global context
2033 * this is safe since the symbol wasn't declared as anything else yet
2035 assert(symbol->declaration == NULL);
2037 context_t *last_context = context;
2038 context = global_context;
2040 environment_push(declaration);
2041 declaration->next = context->declarations;
2042 context->declarations = declaration;
2044 context = last_context;
2049 static expression_t *parse_reference(void)
2051 reference_expression_t *ref = allocate_ast_zero(sizeof(ref[0]));
2053 ref->expression.type = EXPR_REFERENCE;
2054 ref->symbol = token.v.symbol;
2056 declaration_t *declaration = get_declaration(ref->symbol, NAMESPACE_NORMAL);
2058 source_position_t source_position = token.source_position;
2061 if(declaration == NULL) {
2063 /* an implicitely defined function */
2064 if(token.type == '(') {
2065 parser_print_prefix_pos(token.source_position);
2066 fprintf(stderr, "warning: implicit declaration of function '%s'\n",
2067 ref->symbol->string);
2069 declaration = create_implicit_function(ref->symbol,
2074 parser_print_error_prefix();
2075 fprintf(stderr, "unknown symbol '%s' found.\n", ref->symbol->string);
2076 return (expression_t*) ref;
2080 ref->declaration = declaration;
2081 ref->expression.datatype = declaration->type;
2083 return (expression_t*) ref;
2086 static void check_cast_allowed(expression_t *expression, type_t *dest_type)
2090 /* TODO check if explicit cast is allowed and issue warnings/errors */
2093 static expression_t *parse_cast(void)
2095 unary_expression_t *cast = allocate_ast_zero(sizeof(cast[0]));
2097 cast->expression.type = EXPR_UNARY;
2098 cast->type = UNEXPR_CAST;
2099 cast->expression.source_position = token.source_position;
2101 type_t *type = parse_typename();
2104 expression_t *value = parse_sub_expression(20);
2106 check_cast_allowed(value, type);
2108 cast->expression.datatype = type;
2109 cast->value = value;
2111 return (expression_t*) cast;
2114 static expression_t *parse_statement_expression(void)
2116 statement_expression_t *expression
2117 = allocate_ast_zero(sizeof(expression[0]));
2118 expression->expression.type = EXPR_STATEMENT;
2120 statement_t *statement = parse_compound_statement();
2121 expression->statement = statement;
2122 if(statement == NULL) {
2127 assert(statement->type == STATEMENT_COMPOUND);
2128 compound_statement_t *compound_statement
2129 = (compound_statement_t*) statement;
2131 /* find last statement and use it's type */
2132 const statement_t *last_statement = NULL;
2133 const statement_t *iter = compound_statement->statements;
2134 for( ; iter != NULL; iter = iter->next) {
2135 last_statement = iter;
2138 if(last_statement->type == STATEMENT_EXPRESSION) {
2139 const expression_statement_t *expression_statement =
2140 (const expression_statement_t*) last_statement;
2141 expression->expression.datatype
2142 = expression_statement->expression->datatype;
2144 expression->expression.datatype = type_void;
2149 return (expression_t*) expression;
2152 static expression_t *parse_brace_expression(void)
2156 switch(token.type) {
2158 /* gcc extension: a stement expression */
2159 return parse_statement_expression();
2163 return parse_cast();
2165 if(is_typedef_symbol(token.v.symbol)) {
2166 return parse_cast();
2170 expression_t *result = parse_expression();
2176 static expression_t *parse_function_keyword(void)
2178 eat(T___FUNCTION__);
2181 string_literal_t *expression = allocate_ast_zero(sizeof(expression[0]));
2182 expression->expression.type = EXPR_FUNCTION;
2183 expression->expression.datatype = type_string;
2184 expression->value = "TODO: FUNCTION";
2186 return (expression_t*) expression;
2189 static expression_t *parse_pretty_function_keyword(void)
2191 eat(T___PRETTY_FUNCTION__);
2194 string_literal_t *expression = allocate_ast_zero(sizeof(expression[0]));
2195 expression->expression.type = EXPR_PRETTY_FUNCTION;
2196 expression->expression.datatype = type_string;
2197 expression->value = "TODO: PRETTY FUNCTION";
2199 return (expression_t*) expression;
2202 static designator_t *parse_designator(void)
2204 designator_t *result = allocate_ast_zero(sizeof(result[0]));
2206 if(token.type != T_IDENTIFIER) {
2207 parse_error_expected("problem while parsing member designator",
2212 result->symbol = token.v.symbol;
2215 designator_t *last_designator = result;
2217 if(token.type == '.') {
2219 if(token.type != T_IDENTIFIER) {
2220 parse_error_expected("problem while parsing member designator",
2225 designator_t *designator = allocate_ast_zero(sizeof(result[0]));
2226 designator->symbol = token.v.symbol;
2229 last_designator->next = designator;
2230 last_designator = designator;
2233 if(token.type == '[') {
2235 designator_t *designator = allocate_ast_zero(sizeof(result[0]));
2236 designator->array_access = parse_expression();
2237 if(designator->array_access == NULL) {
2243 last_designator->next = designator;
2244 last_designator = designator;
2253 static expression_t *parse_offsetof(void)
2255 eat(T___builtin_offsetof);
2257 offsetof_expression_t *expression
2258 = allocate_ast_zero(sizeof(expression[0]));
2259 expression->expression.type = EXPR_OFFSETOF;
2260 expression->expression.datatype = type_size_t;
2263 expression->type = parse_typename();
2265 expression->designator = parse_designator();
2268 return (expression_t*) expression;
2271 static expression_t *parse_va_arg(void)
2273 eat(T___builtin_va_arg);
2275 va_arg_expression_t *expression = allocate_ast_zero(sizeof(expression[0]));
2276 expression->expression.type = EXPR_VA_ARG;
2279 expression->arg = parse_assignment_expression();
2281 expression->expression.datatype = parse_typename();
2284 return (expression_t*) expression;
2287 static expression_t *parse_builtin_symbol(void)
2289 builtin_symbol_expression_t *expression
2290 = allocate_ast_zero(sizeof(expression[0]));
2291 expression->expression.type = EXPR_BUILTIN_SYMBOL;
2293 /* TODO: set datatype */
2295 expression->symbol = token.v.symbol;
2299 return (expression_t*) expression;
2302 static expression_t *parse_primary_expression(void)
2304 switch(token.type) {
2306 return parse_int_const();
2307 case T_FLOATINGPOINT:
2308 return parse_float_const();
2309 case T_STRING_LITERAL:
2310 return parse_string_const();
2312 return parse_reference();
2313 case T___FUNCTION__:
2314 return parse_function_keyword();
2315 case T___PRETTY_FUNCTION__:
2316 return parse_pretty_function_keyword();
2317 case T___builtin_offsetof:
2318 return parse_offsetof();
2319 case T___builtin_va_arg:
2320 return parse_va_arg();
2321 case T___builtin_expect:
2322 case T___builtin_va_start:
2323 case T___builtin_va_end:
2324 return parse_builtin_symbol();
2327 return parse_brace_expression();
2330 parser_print_error_prefix();
2331 fprintf(stderr, "unexpected token ");
2332 print_token(stderr, &token);
2333 fprintf(stderr, "\n");
2336 expression_t *expression = allocate_ast_zero(sizeof(expression[0]));
2337 expression->type = EXPR_INVALID;
2338 expression->datatype = type_void;
2343 static expression_t *parse_array_expression(unsigned precedence,
2344 expression_t *array_ref)
2350 array_access_expression_t *array_access
2351 = allocate_ast_zero(sizeof(array_access[0]));
2353 array_access->expression.type = EXPR_ARRAY_ACCESS;
2354 array_access->array_ref = array_ref;
2355 array_access->index = parse_expression();
2357 type_t *type = array_ref->datatype;
2359 if(type->type == TYPE_POINTER) {
2360 pointer_type_t *pointer = (pointer_type_t*) type;
2361 array_access->expression.datatype = pointer->points_to;
2362 } else if(type->type == TYPE_ARRAY) {
2363 array_type_t *array_type = (array_type_t*) type;
2364 array_access->expression.datatype = array_type->element_type;
2366 parser_print_error_prefix();
2367 fprintf(stderr, "array access on object with non-pointer type ");
2369 fprintf(stderr, "\n");
2373 if(token.type != ']') {
2374 parse_error_expected("Problem while parsing array access", ']', 0);
2375 return (expression_t*) array_access;
2379 return (expression_t*) array_access;
2382 static bool is_declaration_specifier(const token_t *token,
2383 bool only_type_specifiers)
2385 switch(token->type) {
2389 return is_typedef_symbol(token->v.symbol);
2392 if(only_type_specifiers)
2401 static expression_t *parse_sizeof(unsigned precedence)
2405 sizeof_expression_t *sizeof_expression
2406 = allocate_ast_zero(sizeof(sizeof_expression[0]));
2407 sizeof_expression->expression.type = EXPR_SIZEOF;
2408 sizeof_expression->expression.datatype = type_size_t;
2410 if(token.type == '(' && is_declaration_specifier(look_ahead(1), true)) {
2412 sizeof_expression->type = parse_typename();
2415 expression_t *expression = parse_sub_expression(precedence);
2416 sizeof_expression->type = expression->datatype;
2417 sizeof_expression->size_expression = expression;
2420 return (expression_t*) sizeof_expression;
2423 static expression_t *parse_select_expression(unsigned precedence,
2424 expression_t *compound)
2428 assert(token.type == '.' || token.type == T_MINUSGREATER);
2431 select_expression_t *select = allocate_ast_zero(sizeof(select[0]));
2433 select->expression.type = EXPR_SELECT;
2434 select->compound = compound;
2436 /* TODO: datatype */
2438 if(token.type != T_IDENTIFIER) {
2439 parse_error_expected("Problem while parsing select", T_IDENTIFIER, 0);
2440 return (expression_t*) select;
2442 select->symbol = token.v.symbol;
2445 return (expression_t*) select;
2448 static expression_t *parse_call_expression(unsigned precedence,
2449 expression_t *expression)
2452 call_expression_t *call = allocate_ast_zero(sizeof(call[0]));
2453 call->expression.type = EXPR_CALL;
2454 call->function = expression;
2456 function_type_t *function_type;
2457 type_t *type = expression->datatype;
2458 if(type->type != TYPE_FUNCTION) {
2459 /* TODO calling pointers to functions is ok */
2460 parser_print_error_prefix();
2461 fputs("called object '", stderr);
2462 print_expression(expression);
2463 fputs("' (type ", stderr);
2465 fputs("is not a function\n", stderr);
2467 function_type = NULL;
2468 call->expression.datatype = NULL;
2470 function_type = (function_type_t*) type;
2471 call->expression.datatype = function_type->result_type;
2474 /* parse arguments */
2477 if(token.type != ')') {
2478 call_argument_t *last_argument = NULL;
2481 call_argument_t *argument = allocate_ast_zero(sizeof(argument[0]));
2483 argument->expression = parse_assignment_expression();
2484 if(last_argument == NULL) {
2485 call->arguments = argument;
2487 last_argument->next = argument;
2489 last_argument = argument;
2491 if(token.type != ',')
2498 if(function_type != NULL) {
2499 function_parameter_t *parameter = function_type->parameters;
2500 call_argument_t *argument = call->arguments;
2501 for( ; parameter != NULL && argument != NULL;
2502 parameter = parameter->next, argument = argument->next) {
2503 type_t *expected_type = parameter->type;
2504 /* TODO report context in error messages */
2505 argument->expression = create_implicit_cast(argument->expression,
2508 /* too few parameters */
2509 if(parameter != NULL) {
2510 parser_print_error_prefix();
2511 fprintf(stderr, "too few arguments to function '");
2512 print_expression(expression);
2513 fprintf(stderr, "'\n");
2514 } else if(argument != NULL) {
2515 /* too many parameters */
2516 if(!function_type->variadic
2517 && !function_type->unspecified_parameters) {
2518 parser_print_error_prefix();
2519 fprintf(stderr, "too many arguments to function '");
2520 print_expression(expression);
2521 fprintf(stderr, "'\n");
2523 /* do default promotion */
2524 for( ; argument != NULL; argument = argument->next) {
2525 type_t *type = argument->expression->datatype;
2530 if(is_type_integer(type)) {
2531 type = promote_integer(type);
2532 } else if(type == type_float) {
2535 argument->expression
2536 = create_implicit_cast(argument->expression, type);
2542 return (expression_t*) call;
2545 static type_t *get_type_after_conversion(const type_t *type1,
2546 const type_t *type2)
2550 return (type_t*) type1;
2553 static expression_t *parse_conditional_expression(unsigned precedence,
2554 expression_t *expression)
2558 conditional_expression_t *conditional
2559 = allocate_ast_zero(sizeof(conditional[0]));
2560 conditional->expression.type = EXPR_CONDITIONAL;
2561 conditional->condition = expression;
2564 type_t *condition_type = conditional->condition->datatype;
2565 if(condition_type != NULL) {
2566 if(!is_type_scalar(condition_type)) {
2567 type_error("expected a scalar type", expression->source_position,
2572 conditional->true_expression = parse_expression();
2574 conditional->false_expression = parse_sub_expression(precedence);
2576 type_t *true_type = conditional->true_expression->datatype;
2577 if(true_type == NULL)
2578 return (expression_t*) conditional;
2579 type_t *false_type = conditional->false_expression->datatype;
2580 if(false_type == NULL)
2581 return (expression_t*) conditional;
2584 if(true_type == false_type) {
2585 conditional->expression.datatype = true_type;
2586 } else if(is_type_arithmetic(true_type) && is_type_arithmetic(false_type)) {
2587 type_t *result = get_type_after_conversion(true_type, false_type);
2588 /* TODO: create implicit convs if necessary */
2589 conditional->expression.datatype = result;
2590 } else if(true_type->type == TYPE_POINTER &&
2591 false_type->type == TYPE_POINTER &&
2592 true /* TODO compatible points_to types */) {
2594 } else if(/* (is_null_ptr_const(true_type) && false_type->type == TYPE_POINTER)
2595 || (is_null_ptr_const(false_type) &&
2596 true_type->type == TYPE_POINTER) TODO*/ false) {
2598 } else if(/* 1 is pointer to object type, other is void* */ false) {
2601 type_error_incompatible("problem while parsing conditional",
2602 expression->source_position, true_type,
2606 return (expression_t*) conditional;
2609 static expression_t *parse_extension(unsigned precedence)
2611 eat(T___extension__);
2613 /* TODO enable extensions */
2615 return parse_sub_expression(precedence);
2618 static void semantic_incdec(unary_expression_t *expression)
2620 type_t *orig_type = expression->value->datatype;
2621 if(orig_type == NULL)
2624 type_t *type = skip_typeref(orig_type);
2625 if(!is_type_arithmetic(type) && type->type != TYPE_POINTER) {
2626 /* TODO: improve error message */
2627 parser_print_error_prefix();
2628 fprintf(stderr, "operation needs an arithmetic or pointer type\n");
2632 expression->expression.datatype = orig_type;
2635 static void semantic_unexpr_arithmetic(unary_expression_t *expression)
2637 type_t *orig_type = expression->value->datatype;
2638 if(orig_type == NULL)
2641 type_t *type = skip_typeref(orig_type);
2642 if(!is_type_arithmetic(type)) {
2643 /* TODO: improve error message */
2644 parser_print_error_prefix();
2645 fprintf(stderr, "operation needs an arithmetic type\n");
2649 expression->expression.datatype = orig_type;
2652 static void semantic_dereference(unary_expression_t *expression)
2654 type_t *orig_type = expression->value->datatype;
2655 if(orig_type == NULL)
2658 type_t *type = skip_typeref(orig_type);
2659 if(type->type != TYPE_POINTER) {
2660 /* TODO: improve error message */
2661 parser_print_error_prefix();
2662 fprintf(stderr, "operation needs a pointer type\n");
2666 pointer_type_t *pointer_type = (pointer_type_t*) type;
2667 expression->expression.datatype = pointer_type->points_to;
2670 static void semantic_take_addr(unary_expression_t *expression)
2672 type_t *orig_type = expression->value->datatype;
2673 if(orig_type == NULL)
2676 expression->expression.datatype = make_pointer_type(orig_type, 0);
2679 #define CREATE_UNARY_EXPRESSION_PARSER(token_type, unexpression_type, sfunc) \
2680 static expression_t *parse_##unexpression_type(unsigned precedence) \
2684 unary_expression_t *unary_expression \
2685 = allocate_ast_zero(sizeof(unary_expression[0])); \
2686 unary_expression->expression.type = EXPR_UNARY; \
2687 unary_expression->type = unexpression_type; \
2688 unary_expression->value = parse_sub_expression(precedence); \
2690 sfunc(unary_expression); \
2692 return (expression_t*) unary_expression; \
2695 CREATE_UNARY_EXPRESSION_PARSER('-', UNEXPR_NEGATE, semantic_unexpr_arithmetic)
2696 CREATE_UNARY_EXPRESSION_PARSER('+', UNEXPR_PLUS, semantic_unexpr_arithmetic)
2697 CREATE_UNARY_EXPRESSION_PARSER('!', UNEXPR_NOT, semantic_unexpr_arithmetic)
2698 CREATE_UNARY_EXPRESSION_PARSER('*', UNEXPR_DEREFERENCE, semantic_dereference)
2699 CREATE_UNARY_EXPRESSION_PARSER('&', UNEXPR_TAKE_ADDRESS, semantic_take_addr)
2700 CREATE_UNARY_EXPRESSION_PARSER('~', UNEXPR_BITWISE_NEGATE,
2701 semantic_unexpr_arithmetic)
2702 CREATE_UNARY_EXPRESSION_PARSER(T_PLUSPLUS, UNEXPR_PREFIX_INCREMENT,
2704 CREATE_UNARY_EXPRESSION_PARSER(T_MINUSMINUS, UNEXPR_PREFIX_DECREMENT,
2707 #define CREATE_UNARY_POSTFIX_EXPRESSION_PARSER(token_type, unexpression_type, \
2709 static expression_t *parse_##unexpression_type(unsigned precedence, \
2710 expression_t *left) \
2712 (void) precedence; \
2715 unary_expression_t *unary_expression \
2716 = allocate_ast_zero(sizeof(unary_expression[0])); \
2717 unary_expression->expression.type = EXPR_UNARY; \
2718 unary_expression->type = unexpression_type; \
2719 unary_expression->value = left; \
2721 sfunc(unary_expression); \
2723 return (expression_t*) unary_expression; \
2726 CREATE_UNARY_POSTFIX_EXPRESSION_PARSER(T_PLUSPLUS, UNEXPR_POSTFIX_INCREMENT,
2728 CREATE_UNARY_POSTFIX_EXPRESSION_PARSER(T_MINUSMINUS, UNEXPR_POSTFIX_DECREMENT,
2731 static type_t *semantic_arithmetic(type_t *type_left, type_t *type_right)
2733 /* TODO: handle complex + imaginary types */
2735 /* § 6.3.1.8 Usual arithmetic conversions */
2736 if(type_left == type_long_double || type_right == type_long_double) {
2737 return type_long_double;
2738 } else if(type_left == type_double || type_right == type_double) {
2740 } else if(type_left == type_float || type_right == type_float) {
2744 type_right = promote_integer(type_right);
2745 type_left = promote_integer(type_left);
2747 if(type_left == type_right)
2750 bool signed_left = is_type_signed(type_left);
2751 bool signed_right = is_type_signed(type_right);
2752 if(get_rank(type_left) < get_rank(type_right)) {
2753 if(signed_left == signed_right || !signed_right) {
2759 if(signed_left == signed_right || !signed_left) {
2767 static void semantic_binexpr_arithmetic(binary_expression_t *expression)
2769 expression_t *left = expression->left;
2770 expression_t *right = expression->right;
2771 type_t *orig_type_left = left->datatype;
2772 type_t *orig_type_right = right->datatype;
2774 if(orig_type_left == NULL || orig_type_right == NULL)
2777 type_t *type_left = skip_typeref(orig_type_left);
2778 type_t *type_right = skip_typeref(orig_type_right);
2780 if(!is_type_arithmetic(type_left) || !is_type_arithmetic(type_right)) {
2781 /* TODO: improve error message */
2782 parser_print_error_prefix();
2783 fprintf(stderr, "operation needs arithmetic types\n");
2787 type_t *arithmetic_type = semantic_arithmetic(type_left, type_right);
2788 expression->left = create_implicit_cast(left, arithmetic_type);
2789 expression->right = create_implicit_cast(right, arithmetic_type);
2790 expression->expression.datatype = arithmetic_type;
2793 static void semantic_add(binary_expression_t *expression)
2795 expression_t *left = expression->left;
2796 expression_t *right = expression->right;
2797 type_t *orig_type_left = left->datatype;
2798 type_t *orig_type_right = right->datatype;
2800 if(orig_type_left == NULL || orig_type_right == NULL)
2803 type_t *type_left = skip_typeref(orig_type_left);
2804 type_t *type_right = skip_typeref(orig_type_right);
2807 if(is_type_arithmetic(type_left) && is_type_arithmetic(type_right)) {
2808 type_t *arithmetic_type = semantic_arithmetic(type_left, type_right);
2809 expression->left = create_implicit_cast(left, arithmetic_type);
2810 expression->right = create_implicit_cast(right, arithmetic_type);
2811 expression->expression.datatype = arithmetic_type;
2813 } else if(type_left->type == TYPE_POINTER && is_type_integer(type_right)) {
2814 expression->expression.datatype = type_left;
2815 } else if(type_right->type == TYPE_POINTER && is_type_integer(type_left)) {
2816 expression->expression.datatype = type_right;
2818 parser_print_error_prefix();
2819 fprintf(stderr, "invalid operands to binary + (");
2820 print_type(orig_type_left);
2821 fprintf(stderr, ", ");
2822 print_type(orig_type_right);
2823 fprintf(stderr, ")\n");
2827 static void semantic_sub(binary_expression_t *expression)
2829 expression_t *left = expression->left;
2830 expression_t *right = expression->right;
2831 type_t *orig_type_left = left->datatype;
2832 type_t *orig_type_right = right->datatype;
2834 if(orig_type_left == NULL || orig_type_right == NULL)
2837 type_t *type_left = skip_typeref(orig_type_left);
2838 type_t *type_right = skip_typeref(orig_type_right);
2841 if(is_type_arithmetic(type_left) && is_type_arithmetic(type_right)) {
2842 type_t *arithmetic_type = semantic_arithmetic(type_left, type_right);
2843 expression->left = create_implicit_cast(left, arithmetic_type);
2844 expression->right = create_implicit_cast(right, arithmetic_type);
2845 expression->expression.datatype = arithmetic_type;
2847 } else if(type_left->type == TYPE_POINTER && is_type_integer(type_right)) {
2848 expression->expression.datatype = type_left;
2849 } else if(type_left->type == TYPE_POINTER &&
2850 type_right->type == TYPE_POINTER) {
2851 if(!pointers_compatible(type_left, type_right)) {
2852 parser_print_error_prefix();
2853 fprintf(stderr, "pointers to incompatible objects to binary - (");
2854 print_type(orig_type_left);
2855 fprintf(stderr, ", ");
2856 print_type(orig_type_right);
2857 fprintf(stderr, ")\n");
2859 expression->expression.datatype = type_ptrdiff_t;
2862 parser_print_error_prefix();
2863 fprintf(stderr, "invalid operands to binary - (");
2864 print_type(orig_type_left);
2865 fprintf(stderr, ", ");
2866 print_type(orig_type_right);
2867 fprintf(stderr, ")\n");
2871 static void semantic_comparison(binary_expression_t *expression)
2873 expression_t *left = expression->left;
2874 expression_t *right = expression->right;
2875 type_t *orig_type_left = left->datatype;
2876 type_t *orig_type_right = right->datatype;
2878 if(orig_type_left == NULL || orig_type_right == NULL)
2881 type_t *type_left = skip_typeref(orig_type_left);
2882 type_t *type_right = skip_typeref(orig_type_right);
2884 /* TODO non-arithmetic types */
2885 if(is_type_arithmetic(type_left) && is_type_arithmetic(type_right)) {
2886 type_t *arithmetic_type = semantic_arithmetic(type_left, type_right);
2887 expression->left = create_implicit_cast(left, arithmetic_type);
2888 expression->right = create_implicit_cast(right, arithmetic_type);
2889 expression->expression.datatype = arithmetic_type;
2891 expression->expression.datatype = type_int;
2894 static void semantic_arithmetic_assign(binary_expression_t *expression)
2896 expression_t *left = expression->left;
2897 expression_t *right = expression->right;
2898 type_t *orig_type_left = left->datatype;
2899 type_t *orig_type_right = right->datatype;
2901 if(orig_type_left == NULL || orig_type_right == NULL)
2904 type_t *type_left = skip_typeref(orig_type_left);
2905 type_t *type_right = skip_typeref(orig_type_right);
2907 if(!is_type_arithmetic(type_left) || !is_type_arithmetic(type_right)) {
2908 /* TODO: improve error message */
2909 parser_print_error_prefix();
2910 fprintf(stderr, "operation needs arithmetic types\n");
2914 /* combined instructions are tricky. We can't create an implicit cast on
2915 * the left side, because we need the uncasted form for the store.
2916 * The ast2firm pass has to know that left_type must be right_type
2917 * for the arithmeitc operation and create a cast by itself */
2918 type_t *arithmetic_type = semantic_arithmetic(type_left, type_right);
2919 expression->right = create_implicit_cast(right, arithmetic_type);
2920 expression->expression.datatype = type_left;
2923 static void semantic_logical_op(binary_expression_t *expression)
2925 expression_t *left = expression->left;
2926 expression_t *right = expression->right;
2927 type_t *orig_type_left = left->datatype;
2928 type_t *orig_type_right = right->datatype;
2930 if(orig_type_left == NULL || orig_type_right == NULL)
2933 type_t *type_left = skip_typeref(orig_type_left);
2934 type_t *type_right = skip_typeref(orig_type_right);
2936 if(!is_type_arithmetic(type_left) || !is_type_arithmetic(type_right)) {
2937 /* TODO: improve error message */
2938 parser_print_error_prefix();
2939 fprintf(stderr, "operation needs arithmetic types\n");
2943 expression->expression.datatype = type_int;
2946 static void semantic_binexpr_assign(binary_expression_t *expression)
2948 expression_t *left = expression->left;
2949 type_t *type_left = left->datatype;
2951 if(type_left != NULL) {
2952 semantic_assign(type_left, &expression->right, "assignment");
2955 expression->expression.datatype = type_left;
2958 static void semantic_comma(binary_expression_t *expression)
2960 expression->expression.datatype = expression->right->datatype;
2963 #define CREATE_BINEXPR_PARSER(token_type, binexpression_type, sfunc, lr) \
2964 static expression_t *parse_##binexpression_type(unsigned precedence, \
2965 expression_t *left) \
2969 expression_t *right = parse_sub_expression(precedence + lr); \
2971 binary_expression_t *binexpr \
2972 = allocate_ast_zero(sizeof(binexpr[0])); \
2973 binexpr->expression.type = EXPR_BINARY; \
2974 binexpr->type = binexpression_type; \
2975 binexpr->left = left; \
2976 binexpr->right = right; \
2979 return (expression_t*) binexpr; \
2982 CREATE_BINEXPR_PARSER(',', BINEXPR_COMMA, semantic_comma, 1)
2983 CREATE_BINEXPR_PARSER('*', BINEXPR_MUL, semantic_binexpr_arithmetic, 1)
2984 CREATE_BINEXPR_PARSER('/', BINEXPR_DIV, semantic_binexpr_arithmetic, 1)
2985 CREATE_BINEXPR_PARSER('%', BINEXPR_MOD, semantic_binexpr_arithmetic, 1)
2986 CREATE_BINEXPR_PARSER('+', BINEXPR_ADD, semantic_add, 1)
2987 CREATE_BINEXPR_PARSER('-', BINEXPR_SUB, semantic_sub, 1)
2988 CREATE_BINEXPR_PARSER('<', BINEXPR_LESS, semantic_comparison, 1)
2989 CREATE_BINEXPR_PARSER('>', BINEXPR_GREATER, semantic_comparison, 1)
2990 CREATE_BINEXPR_PARSER('=', BINEXPR_ASSIGN, semantic_binexpr_assign, 0)
2991 CREATE_BINEXPR_PARSER(T_EQUALEQUAL, BINEXPR_EQUAL, semantic_comparison, 1)
2992 CREATE_BINEXPR_PARSER(T_EXCLAMATIONMARKEQUAL, BINEXPR_NOTEQUAL,
2993 semantic_comparison, 1)
2994 CREATE_BINEXPR_PARSER(T_LESSEQUAL, BINEXPR_LESSEQUAL, semantic_comparison, 1)
2995 CREATE_BINEXPR_PARSER(T_GREATEREQUAL, BINEXPR_GREATEREQUAL,
2996 semantic_comparison, 1)
2997 CREATE_BINEXPR_PARSER('&', BINEXPR_BITWISE_AND, semantic_binexpr_arithmetic, 1)
2998 CREATE_BINEXPR_PARSER('|', BINEXPR_BITWISE_OR, semantic_binexpr_arithmetic, 1)
2999 CREATE_BINEXPR_PARSER('^', BINEXPR_BITWISE_XOR, semantic_binexpr_arithmetic, 1)
3000 CREATE_BINEXPR_PARSER(T_ANDAND, BINEXPR_LOGICAL_AND, semantic_logical_op, 1)
3001 CREATE_BINEXPR_PARSER(T_PIPEPIPE, BINEXPR_LOGICAL_OR, semantic_logical_op, 1)
3002 /* TODO shift has a bit special semantic */
3003 CREATE_BINEXPR_PARSER(T_LESSLESS, BINEXPR_SHIFTLEFT,
3004 semantic_binexpr_arithmetic, 1)
3005 CREATE_BINEXPR_PARSER(T_GREATERGREATER, BINEXPR_SHIFTRIGHT,
3006 semantic_binexpr_arithmetic, 1)
3007 CREATE_BINEXPR_PARSER(T_PLUSEQUAL, BINEXPR_ADD_ASSIGN,
3008 semantic_arithmetic_assign, 0)
3009 CREATE_BINEXPR_PARSER(T_MINUSEQUAL, BINEXPR_SUB_ASSIGN,
3010 semantic_arithmetic_assign, 0)
3011 CREATE_BINEXPR_PARSER(T_ASTERISKEQUAL, BINEXPR_MUL_ASSIGN,
3012 semantic_arithmetic_assign, 0)
3013 CREATE_BINEXPR_PARSER(T_SLASHEQUAL, BINEXPR_DIV_ASSIGN,
3014 semantic_arithmetic_assign, 0)
3015 CREATE_BINEXPR_PARSER(T_PERCENTEQUAL, BINEXPR_MOD_ASSIGN,
3016 semantic_arithmetic_assign, 0)
3017 CREATE_BINEXPR_PARSER(T_LESSLESSEQUAL, BINEXPR_SHIFTLEFT_ASSIGN,
3018 semantic_arithmetic_assign, 0)
3019 CREATE_BINEXPR_PARSER(T_GREATERGREATEREQUAL, BINEXPR_SHIFTRIGHT_ASSIGN,
3020 semantic_arithmetic_assign, 0)
3021 CREATE_BINEXPR_PARSER(T_ANDEQUAL, BINEXPR_BITWISE_AND_ASSIGN,
3022 semantic_arithmetic_assign, 0)
3023 CREATE_BINEXPR_PARSER(T_PIPEEQUAL, BINEXPR_BITWISE_OR_ASSIGN,
3024 semantic_arithmetic_assign, 0)
3025 CREATE_BINEXPR_PARSER(T_CARETEQUAL, BINEXPR_BITWISE_XOR_ASSIGN,
3026 semantic_arithmetic_assign, 0)
3028 static expression_t *parse_sub_expression(unsigned precedence)
3030 if(token.type < 0) {
3031 return expected_expression_error();
3034 expression_parser_function_t *parser
3035 = &expression_parsers[token.type];
3036 source_position_t source_position = token.source_position;
3039 if(parser->parser != NULL) {
3040 left = parser->parser(parser->precedence);
3042 left = parse_primary_expression();
3044 assert(left != NULL);
3045 left->source_position = source_position;
3048 if(token.type < 0) {
3049 return expected_expression_error();
3052 parser = &expression_parsers[token.type];
3053 if(parser->infix_parser == NULL)
3055 if(parser->infix_precedence < precedence)
3058 left = parser->infix_parser(parser->infix_precedence, left);
3060 assert(left != NULL);
3061 assert(left->type != EXPR_INVALID);
3062 left->source_position = source_position;
3068 static expression_t *parse_expression(void)
3070 return parse_sub_expression(1);
3075 static void register_expression_parser(parse_expression_function parser,
3076 int token_type, unsigned precedence)
3078 expression_parser_function_t *entry = &expression_parsers[token_type];
3080 if(entry->parser != NULL) {
3081 fprintf(stderr, "for token ");
3082 print_token_type(stderr, token_type);
3083 fprintf(stderr, "\n");
3084 panic("trying to register multiple expression parsers for a token");
3086 entry->parser = parser;
3087 entry->precedence = precedence;
3090 static void register_expression_infix_parser(
3091 parse_expression_infix_function parser, int token_type,
3092 unsigned precedence)
3094 expression_parser_function_t *entry = &expression_parsers[token_type];
3096 if(entry->infix_parser != NULL) {
3097 fprintf(stderr, "for token ");
3098 print_token_type(stderr, token_type);
3099 fprintf(stderr, "\n");
3100 panic("trying to register multiple infix expression parsers for a "
3103 entry->infix_parser = parser;
3104 entry->infix_precedence = precedence;
3107 static void init_expression_parsers(void)
3109 memset(&expression_parsers, 0, sizeof(expression_parsers));
3111 register_expression_infix_parser(parse_BINEXPR_MUL, '*', 16);
3112 register_expression_infix_parser(parse_BINEXPR_DIV, '/', 16);
3113 register_expression_infix_parser(parse_BINEXPR_MOD, '%', 16);
3114 register_expression_infix_parser(parse_BINEXPR_SHIFTLEFT, T_LESSLESS, 16);
3115 register_expression_infix_parser(parse_BINEXPR_SHIFTRIGHT,
3116 T_GREATERGREATER, 16);
3117 register_expression_infix_parser(parse_BINEXPR_ADD, '+', 15);
3118 register_expression_infix_parser(parse_BINEXPR_SUB, '-', 15);
3119 register_expression_infix_parser(parse_BINEXPR_LESS, '<', 14);
3120 register_expression_infix_parser(parse_BINEXPR_GREATER, '>', 14);
3121 register_expression_infix_parser(parse_BINEXPR_LESSEQUAL, T_LESSEQUAL, 14);
3122 register_expression_infix_parser(parse_BINEXPR_GREATEREQUAL,
3123 T_GREATEREQUAL, 14);
3124 register_expression_infix_parser(parse_BINEXPR_EQUAL, T_EQUALEQUAL, 13);
3125 register_expression_infix_parser(parse_BINEXPR_NOTEQUAL,
3126 T_EXCLAMATIONMARKEQUAL, 13);
3127 register_expression_infix_parser(parse_BINEXPR_BITWISE_AND, '&', 12);
3128 register_expression_infix_parser(parse_BINEXPR_BITWISE_XOR, '^', 11);
3129 register_expression_infix_parser(parse_BINEXPR_BITWISE_OR, '|', 10);
3130 register_expression_infix_parser(parse_BINEXPR_LOGICAL_AND, T_ANDAND, 9);
3131 register_expression_infix_parser(parse_BINEXPR_LOGICAL_OR, T_PIPEPIPE, 8);
3132 register_expression_infix_parser(parse_conditional_expression, '?', 7);
3133 register_expression_infix_parser(parse_BINEXPR_ASSIGN, '=', 2);
3134 register_expression_infix_parser(parse_BINEXPR_ADD_ASSIGN, T_PLUSEQUAL, 2);
3135 register_expression_infix_parser(parse_BINEXPR_SUB_ASSIGN, T_MINUSEQUAL, 2);
3136 register_expression_infix_parser(parse_BINEXPR_MUL_ASSIGN,
3137 T_ASTERISKEQUAL, 2);
3138 register_expression_infix_parser(parse_BINEXPR_DIV_ASSIGN, T_SLASHEQUAL, 2);
3139 register_expression_infix_parser(parse_BINEXPR_MOD_ASSIGN,
3141 register_expression_infix_parser(parse_BINEXPR_SHIFTLEFT_ASSIGN,
3142 T_LESSLESSEQUAL, 2);
3143 register_expression_infix_parser(parse_BINEXPR_SHIFTRIGHT_ASSIGN,
3144 T_GREATERGREATEREQUAL, 2);
3145 register_expression_infix_parser(parse_BINEXPR_BITWISE_AND_ASSIGN,
3147 register_expression_infix_parser(parse_BINEXPR_BITWISE_OR_ASSIGN,
3149 register_expression_infix_parser(parse_BINEXPR_BITWISE_XOR_ASSIGN,
3152 register_expression_infix_parser(parse_BINEXPR_COMMA, ',', 1);
3154 register_expression_infix_parser(parse_array_expression, '[', 30);
3155 register_expression_infix_parser(parse_call_expression, '(', 30);
3156 register_expression_infix_parser(parse_select_expression, '.', 30);
3157 register_expression_infix_parser(parse_select_expression,
3158 T_MINUSGREATER, 30);
3159 register_expression_infix_parser(parse_UNEXPR_POSTFIX_INCREMENT,
3161 register_expression_infix_parser(parse_UNEXPR_POSTFIX_DECREMENT,
3164 register_expression_parser(parse_UNEXPR_NEGATE, '-', 25);
3165 register_expression_parser(parse_UNEXPR_PLUS, '+', 25);
3166 register_expression_parser(parse_UNEXPR_NOT, '!', 25);
3167 register_expression_parser(parse_UNEXPR_BITWISE_NEGATE, '~', 25);
3168 register_expression_parser(parse_UNEXPR_DEREFERENCE, '*', 25);
3169 register_expression_parser(parse_UNEXPR_TAKE_ADDRESS, '&', 25);
3170 register_expression_parser(parse_UNEXPR_PREFIX_INCREMENT, T_PLUSPLUS, 25);
3171 register_expression_parser(parse_UNEXPR_PREFIX_DECREMENT, T_MINUSMINUS, 25);
3172 register_expression_parser(parse_sizeof, T_sizeof, 25);
3173 register_expression_parser(parse_extension, T___extension__, 25);
3177 static statement_t *parse_case_statement(void)
3180 case_label_statement_t *label = allocate_ast_zero(sizeof(label[0]));
3181 label->statement.type = STATEMENT_CASE_LABEL;
3182 label->statement.source_position = token.source_position;
3184 label->expression = parse_expression();
3187 label->statement.next = parse_statement();
3189 return (statement_t*) label;
3192 static statement_t *parse_default_statement(void)
3196 case_label_statement_t *label = allocate_ast_zero(sizeof(label[0]));
3197 label->statement.type = STATEMENT_CASE_LABEL;
3198 label->statement.source_position = token.source_position;
3201 label->statement.next = parse_statement();
3203 return (statement_t*) label;
3206 static declaration_t *get_label(symbol_t *symbol)
3208 declaration_t *candidate = get_declaration(symbol, NAMESPACE_LABEL);
3209 assert(current_function != NULL);
3210 /* if we found a label in the same function, then we already created the
3212 if(candidate != NULL
3213 && candidate->parent_context == ¤t_function->context) {
3217 /* otherwise we need to create a new one */
3218 declaration_t *declaration = allocate_ast_zero(sizeof(declaration[0]));
3219 declaration->namespace = NAMESPACE_LABEL;
3220 declaration->symbol = symbol;
3222 label_push(declaration);
3227 static statement_t *parse_label_statement(void)
3229 assert(token.type == T_IDENTIFIER);
3230 symbol_t *symbol = token.v.symbol;
3233 declaration_t *label = get_label(symbol);
3235 /* if source position is already set then the label is defined twice,
3236 * otherwise it was just mentioned in a goto so far */
3237 if(label->source_position.input_name != NULL) {
3238 parser_print_error_prefix();
3239 fprintf(stderr, "duplicate label '%s'\n", symbol->string);
3240 parser_print_error_prefix_pos(label->source_position);
3241 fprintf(stderr, "previous definition of '%s' was here\n",
3244 label->source_position = token.source_position;
3247 label_statement_t *label_statement = allocate_ast_zero(sizeof(label[0]));
3249 label_statement->statement.type = STATEMENT_LABEL;
3250 label_statement->statement.source_position = token.source_position;
3251 label_statement->label = label;
3255 if(token.type == '}') {
3256 parse_error("label at end of compound statement");
3257 return (statement_t*) label_statement;
3259 label_statement->label_statement = parse_statement();
3262 return (statement_t*) label_statement;
3265 static statement_t *parse_if(void)
3269 if_statement_t *statement = allocate_ast_zero(sizeof(statement[0]));
3270 statement->statement.type = STATEMENT_IF;
3271 statement->statement.source_position = token.source_position;
3274 statement->condition = parse_expression();
3277 statement->true_statement = parse_statement();
3278 if(token.type == T_else) {
3280 statement->false_statement = parse_statement();
3283 return (statement_t*) statement;
3286 static statement_t *parse_switch(void)
3290 switch_statement_t *statement = allocate_ast_zero(sizeof(statement[0]));
3291 statement->statement.type = STATEMENT_SWITCH;
3292 statement->statement.source_position = token.source_position;
3295 statement->expression = parse_expression();
3297 statement->body = parse_statement();
3299 return (statement_t*) statement;
3302 static statement_t *parse_while(void)
3306 while_statement_t *statement = allocate_ast_zero(sizeof(statement[0]));
3307 statement->statement.type = STATEMENT_WHILE;
3308 statement->statement.source_position = token.source_position;
3311 statement->condition = parse_expression();
3313 statement->body = parse_statement();
3315 return (statement_t*) statement;
3318 static statement_t *parse_do(void)
3322 do_while_statement_t *statement = allocate_ast_zero(sizeof(statement[0]));
3323 statement->statement.type = STATEMENT_DO_WHILE;
3324 statement->statement.source_position = token.source_position;
3326 statement->body = parse_statement();
3329 statement->condition = parse_expression();
3333 return (statement_t*) statement;
3336 static statement_t *parse_for(void)
3340 for_statement_t *statement = allocate_ast_zero(sizeof(statement[0]));
3341 statement->statement.type = STATEMENT_FOR;
3342 statement->statement.source_position = token.source_position;
3346 int top = environment_top();
3347 context_t *last_context = context;
3348 set_context(&statement->context);
3350 if(token.type != ';') {
3351 if(is_declaration_specifier(&token, false)) {
3352 parse_declaration();
3354 statement->initialisation = parse_expression();
3361 if(token.type != ';') {
3362 statement->condition = parse_expression();
3365 if(token.type != ')') {
3366 statement->step = parse_expression();
3369 statement->body = parse_statement();
3371 assert(context == &statement->context);
3372 set_context(last_context);
3373 environment_pop_to(top);
3375 return (statement_t*) statement;
3378 static statement_t *parse_goto(void)
3382 if(token.type != T_IDENTIFIER) {
3383 parse_error_expected("while parsing goto", T_IDENTIFIER, 0);
3387 symbol_t *symbol = token.v.symbol;
3390 declaration_t *label = get_label(symbol);
3392 goto_statement_t *statement = allocate_ast_zero(sizeof(statement[0]));
3394 statement->statement.type = STATEMENT_GOTO;
3395 statement->statement.source_position = token.source_position;
3397 statement->label = label;
3401 return (statement_t*) statement;
3404 static statement_t *parse_continue(void)
3409 statement_t *statement = allocate_ast_zero(sizeof(statement[0]));
3410 statement->type = STATEMENT_CONTINUE;
3411 statement->source_position = token.source_position;
3416 static statement_t *parse_break(void)
3421 statement_t *statement = allocate_ast_zero(sizeof(statement[0]));
3422 statement->type = STATEMENT_BREAK;
3423 statement->source_position = token.source_position;
3428 static statement_t *parse_return(void)
3432 return_statement_t *statement = allocate_ast_zero(sizeof(statement[0]));
3434 statement->statement.type = STATEMENT_RETURN;
3435 statement->statement.source_position = token.source_position;
3437 assert(current_function->type->type == TYPE_FUNCTION);
3438 function_type_t *function_type = (function_type_t*) current_function->type;
3439 type_t *return_type = function_type->result_type;
3441 expression_t *return_value;
3442 if(token.type != ';') {
3443 return_value = parse_expression();
3445 if(return_type == type_void && return_value->datatype != type_void) {
3446 parse_warning("'return' with a value, in function returning void");
3447 return_value = NULL;
3449 if(return_type != NULL) {
3450 semantic_assign(return_type, &return_value, "'return'");
3454 return_value = NULL;
3455 if(return_type != type_void) {
3456 parse_warning("'return' without value, in function returning "
3460 statement->return_value = return_value;
3464 return (statement_t*) statement;
3467 static statement_t *parse_declaration_statement(void)
3469 declaration_t *before = last_declaration;
3471 declaration_statement_t *statement
3472 = allocate_ast_zero(sizeof(statement[0]));
3473 statement->statement.type = STATEMENT_DECLARATION;
3474 statement->statement.source_position = token.source_position;
3476 declaration_specifiers_t specifiers;
3477 memset(&specifiers, 0, sizeof(specifiers));
3478 parse_declaration_specifiers(&specifiers);
3480 if(token.type == ';') {
3483 parse_init_declarators(&specifiers);
3486 if(before == NULL) {
3487 statement->declarations_begin = context->declarations;
3489 statement->declarations_begin = before->next;
3491 statement->declarations_end = last_declaration;
3493 return (statement_t*) statement;
3496 static statement_t *parse_expression_statement(void)
3498 expression_statement_t *statement = allocate_ast_zero(sizeof(statement[0]));
3499 statement->statement.type = STATEMENT_EXPRESSION;
3500 statement->statement.source_position = token.source_position;
3502 statement->expression = parse_expression();
3506 return (statement_t*) statement;
3509 static statement_t *parse_statement(void)
3511 statement_t *statement = NULL;
3513 /* declaration or statement */
3514 switch(token.type) {
3516 statement = parse_case_statement();
3520 statement = parse_default_statement();
3524 statement = parse_compound_statement();
3528 statement = parse_if();
3532 statement = parse_switch();
3536 statement = parse_while();
3540 statement = parse_do();
3544 statement = parse_for();
3548 statement = parse_goto();
3552 statement = parse_continue();
3556 statement = parse_break();
3560 statement = parse_return();
3569 if(look_ahead(1)->type == ':') {
3570 statement = parse_label_statement();
3574 if(is_typedef_symbol(token.v.symbol)) {
3575 statement = parse_declaration_statement();
3579 statement = parse_expression_statement();
3582 case T___extension__:
3583 /* this can be a prefix to a declaration or an expression statement */
3584 /* we simply eat it now and parse the rest with tail recursion */
3587 } while(token.type == T___extension__);
3588 statement = parse_statement();
3592 statement = parse_declaration_statement();
3596 statement = parse_expression_statement();
3600 assert(statement == NULL || statement->source_position.input_name != NULL);
3605 static statement_t *parse_compound_statement(void)
3607 compound_statement_t *compound_statement
3608 = allocate_ast_zero(sizeof(compound_statement[0]));
3609 compound_statement->statement.type = STATEMENT_COMPOUND;
3610 compound_statement->statement.source_position = token.source_position;
3614 int top = environment_top();
3615 context_t *last_context = context;
3616 set_context(&compound_statement->context);
3618 statement_t *last_statement = NULL;
3620 while(token.type != '}' && token.type != T_EOF) {
3621 statement_t *statement = parse_statement();
3622 if(statement == NULL)
3625 if(last_statement != NULL) {
3626 last_statement->next = statement;
3628 compound_statement->statements = statement;
3631 while(statement->next != NULL)
3632 statement = statement->next;
3634 last_statement = statement;
3637 if(token.type != '}') {
3638 parser_print_error_prefix_pos(
3639 compound_statement->statement.source_position);
3640 fprintf(stderr, "end of file while looking for closing '}'\n");
3644 assert(context == &compound_statement->context);
3645 set_context(last_context);
3646 environment_pop_to(top);
3648 return (statement_t*) compound_statement;
3651 static translation_unit_t *parse_translation_unit(void)
3653 translation_unit_t *unit = allocate_ast_zero(sizeof(unit[0]));
3655 assert(global_context == NULL);
3656 global_context = &unit->context;
3658 assert(context == NULL);
3659 set_context(&unit->context);
3661 while(token.type != T_EOF) {
3662 parse_declaration();
3665 assert(context == &unit->context);
3667 last_declaration = NULL;
3669 assert(global_context == &unit->context);
3670 global_context = NULL;
3675 translation_unit_t *parse(void)
3677 environment_stack = NEW_ARR_F(stack_entry_t, 0);
3678 label_stack = NEW_ARR_F(stack_entry_t, 0);
3679 found_error = false;
3681 type_set_output(stderr);
3682 ast_set_output(stderr);
3684 lookahead_bufpos = 0;
3685 for(int i = 0; i < MAX_LOOKAHEAD + 2; ++i) {
3688 translation_unit_t *unit = parse_translation_unit();
3690 DEL_ARR_F(environment_stack);
3691 DEL_ARR_F(label_stack);
3699 void init_parser(void)
3701 init_expression_parsers();
3702 obstack_init(&temp_obst);
3704 type_int = make_atomic_type(ATOMIC_TYPE_INT, 0);
3705 type_uint = make_atomic_type(ATOMIC_TYPE_UINT, 0);
3706 type_long_double = make_atomic_type(ATOMIC_TYPE_LONG_DOUBLE, 0);
3707 type_double = make_atomic_type(ATOMIC_TYPE_DOUBLE, 0);
3708 type_float = make_atomic_type(ATOMIC_TYPE_FLOAT, 0);
3709 type_size_t = make_atomic_type(ATOMIC_TYPE_ULONG, 0);
3710 type_ptrdiff_t = make_atomic_type(ATOMIC_TYPE_LONG, 0);
3711 type_const_char = make_atomic_type(ATOMIC_TYPE_CHAR, TYPE_QUALIFIER_CONST);
3712 type_void = make_atomic_type(ATOMIC_TYPE_VOID, 0);
3713 type_string = make_pointer_type(type_const_char, 0);
3716 void exit_parser(void)
3718 obstack_free(&temp_obst, NULL);