11 #include "adt/bitfiddle.h"
12 #include "adt/error.h"
19 void *allocate_ast_zero(size_t size)
21 void *res = allocate_ast(size);
29 lexer_next_token(&token);
32 print_token(stderr, &token);
33 fprintf(stderr, "\n");
38 void eat(token_type_t type)
40 assert(token.type == type);
44 void parser_print_error_prefix(void)
46 fputs(source_position.input_name, stderr);
48 fprintf(stderr, "%d", source_position.linenr);
49 fputs(": error: ", stderr);
53 void parse_error(const char *message)
55 parser_print_error_prefix();
56 fprintf(stderr, "parse error: %s\n", message);
60 void parse_error_expected(const char *message, ...)
66 parser_print_error_prefix();
67 fprintf(stderr, "%s\n", message);
69 parser_print_error_prefix();
70 fputs("Parse error: got ", stderr);
71 print_token(stderr, &token);
72 fputs(", expected ", stderr);
74 va_start(args, message);
75 token_type_t token_type = va_arg(args, token_type_t);
76 while(token_type != 0) {
80 fprintf(stderr, ", ");
82 print_token_type(stderr, token_type);
83 token_type = va_arg(args, token_type_t);
86 fprintf(stderr, "\n");
90 void eat_until_semi(void)
92 while(token.type != ';') {
94 if(token.type == T_EOF)
100 #define expect(expected) \
101 if(UNLIKELY(token.type != (expected))) { \
102 parse_error_expected(NULL, (expected), 0); \
108 #define expect_void(expected) \
109 if(UNLIKELY(token.type != (expected))) { \
110 parse_error_expected(NULL, (expected), 0); \
118 SPECIFIER_SIGNED = 1 << 0,
119 SPECIFIER_UNSIGNED = 1 << 1,
120 SPECIFIER_LONG = 1 << 2,
121 SPECIFIER_INT = 1 << 3,
122 SPECIFIER_DOUBLE = 1 << 4,
123 SPECIFIER_CHAR = 1 << 5,
124 SPECIFIER_SHORT = 1 << 6,
125 SPECIFIER_LONG_LONG = 1 << 7,
126 SPECIFIER_FLOAT = 1 << 8,
127 SPECIFIER_BOOL = 1 << 9,
128 SPECIFIER_VOID = 1 << 10,
129 #ifdef PROVIDE_COMPLEX
130 SPECIFIER_COMPLEX = 1 << 11,
132 #ifdef PROVIDE_IMAGINARY
133 SPECIFIER_IMAGINARY = 1 << 12,
139 STORAGE_CLASS_TYPEDEF,
140 STORAGE_CLASS_EXTERN,
141 STORAGE_CLASS_STATIC,
143 STORAGE_CLASS_REGISTER
146 typedef struct declaration_specifiers_t declaration_specifiers_t;
147 struct declaration_specifiers_t {
148 storage_class_t storage_class;
153 void parse_declaration_specifiers(declaration_specifiers_t *specifiers)
155 type_type_t type_type = TYPE_INVALID;
156 atomic_type_type_t atomic_type = ATOMIC_TYPE_INVALID;
157 unsigned type_qualifiers = 0;
158 unsigned type_specifiers = 0;
164 #define MATCH_STORAGE_CLASS(token, class) \
166 if(specifiers->storage_class != STORAGE_CLASS_NONE) { \
167 parse_error("multiple storage classes in declaration " \
170 specifiers->storage_class = class; \
174 MATCH_STORAGE_CLASS(T_typedef, STORAGE_CLASS_TYPEDEF)
175 MATCH_STORAGE_CLASS(T_extern, STORAGE_CLASS_EXTERN)
176 MATCH_STORAGE_CLASS(T_static, STORAGE_CLASS_STATIC)
177 MATCH_STORAGE_CLASS(T_auto, STORAGE_CLASS_AUTO)
178 MATCH_STORAGE_CLASS(T_register, STORAGE_CLASS_REGISTER)
180 /* type qualifiers */
181 #define MATCH_TYPE_QUALIFIER(token, qualifier) \
183 type_qualifiers |= qualifier; \
187 MATCH_TYPE_QUALIFIER(T_const, TYPE_QUALIFIER_CONST);
188 MATCH_TYPE_QUALIFIER(T_restrict, TYPE_QUALIFIER_RESTRICT);
189 MATCH_TYPE_QUALIFIER(T_volatile, TYPE_QUALIFIER_VOLATILE);
190 MATCH_TYPE_QUALIFIER(T_inline, TYPE_QUALIFIER_INLINE);
192 /* type specifiers */
193 #define MATCH_SPECIFIER(token, specifier, name) \
196 if(type_specifiers & specifier) { \
197 parse_error("multiple " name " type specifiers given"); \
199 type_specifiers |= specifier; \
203 MATCH_SPECIFIER(T_void, SPECIFIER_VOID, "void")
204 MATCH_SPECIFIER(T_char, SPECIFIER_CHAR, "char")
205 MATCH_SPECIFIER(T_short, SPECIFIER_SHORT, "short")
206 MATCH_SPECIFIER(T_int, SPECIFIER_INT, "int")
207 MATCH_SPECIFIER(T_float, SPECIFIER_FLOAT, "float")
208 MATCH_SPECIFIER(T_double, SPECIFIER_DOUBLE, "double")
209 MATCH_SPECIFIER(T_signed, SPECIFIER_SIGNED, "signed")
210 MATCH_SPECIFIER(T_unsigned, SPECIFIER_UNSIGNED, "unsigned")
211 MATCH_SPECIFIER(T__Bool, SPECIFIER_BOOL, "_Bool")
212 #ifdef PROVIDE_COMPLEX
213 MATCH_SPECIFIER(T__Complex, SPECIFIER_COMPLEX, "_Complex")
215 #ifdef PROVIDE_IMAGINARY
216 MATCH_SPECIFIER(T__Imaginary, SPECIFIER_IMAGINARY, "_Imaginary")
220 if(type_specifiers & SPECIFIER_LONG_LONG) {
221 parse_error("too many long type specifiers given");
222 } else if(type_specifiers & SPECIFIER_LONG) {
223 type_specifiers |= SPECIFIER_LONG_LONG;
225 type_specifiers |= SPECIFIER_LONG;
235 /* function specifier */
237 goto finish_specifiers;
242 if(type_type == TYPE_INVALID) {
243 /* match valid basic types */
244 switch(type_specifiers) {
246 atomic_type = ATOMIC_TYPE_VOID;
249 atomic_type = ATOMIC_TYPE_CHAR;
251 case SPECIFIER_SIGNED | SPECIFIER_CHAR:
252 atomic_type = ATOMIC_TYPE_SCHAR;
254 case SPECIFIER_UNSIGNED | SPECIFIER_CHAR:
255 atomic_type = ATOMIC_TYPE_UCHAR;
257 case SPECIFIER_SHORT:
258 case SPECIFIER_SIGNED | SPECIFIER_SHORT:
259 case SPECIFIER_SHORT | SPECIFIER_INT:
260 case SPECIFIER_SIGNED | SPECIFIER_SHORT | SPECIFIER_INT:
261 atomic_type = ATOMIC_TYPE_SHORT;
263 case SPECIFIER_UNSIGNED | SPECIFIER_SHORT:
264 case SPECIFIER_UNSIGNED | SPECIFIER_SHORT | SPECIFIER_INT:
265 atomic_type = ATOMIC_TYPE_USHORT;
268 case SPECIFIER_SIGNED:
269 case SPECIFIER_SIGNED | SPECIFIER_INT:
270 atomic_type = ATOMIC_TYPE_INT;
272 case SPECIFIER_UNSIGNED:
273 case SPECIFIER_UNSIGNED | SPECIFIER_INT:
274 atomic_type = ATOMIC_TYPE_UINT;
277 case SPECIFIER_SIGNED | SPECIFIER_LONG:
278 case SPECIFIER_LONG | SPECIFIER_INT:
279 case SPECIFIER_SIGNED | SPECIFIER_LONG | SPECIFIER_INT:
280 atomic_type = ATOMIC_TYPE_LONG;
282 case SPECIFIER_UNSIGNED | SPECIFIER_LONG:
283 case SPECIFIER_UNSIGNED | SPECIFIER_LONG | SPECIFIER_INT:
284 atomic_type = ATOMIC_TYPE_ULONG;
286 case SPECIFIER_LONG_LONG:
287 case SPECIFIER_SIGNED | SPECIFIER_LONG_LONG:
288 case SPECIFIER_LONG_LONG | SPECIFIER_INT:
289 case SPECIFIER_SIGNED | SPECIFIER_LONG_LONG | SPECIFIER_INT:
290 atomic_type = ATOMIC_TYPE_LONGLONG;
292 case SPECIFIER_UNSIGNED | SPECIFIER_LONG_LONG:
293 case SPECIFIER_UNSIGNED | SPECIFIER_LONG_LONG | SPECIFIER_INT:
294 atomic_type = ATOMIC_TYPE_ULONGLONG;
296 case SPECIFIER_FLOAT:
297 atomic_type = ATOMIC_TYPE_FLOAT;
299 case SPECIFIER_DOUBLE:
300 atomic_type = ATOMIC_TYPE_DOUBLE;
302 case SPECIFIER_LONG | SPECIFIER_DOUBLE:
303 atomic_type = ATOMIC_TYPE_LONG_DOUBLE;
306 atomic_type = ATOMIC_TYPE_BOOL;
308 #ifdef PROVIDE_COMPLEX
309 case SPECIFIER_FLOAT | SPECIFIER_COMPLEX:
310 atomic_type = ATOMIC_TYPE_FLOAT_COMPLEX;
312 case SPECIFIER_DOUBLE | SPECIFIER_COMPLEX:
313 atomic_type = ATOMIC_TYPE_DOUBLE_COMPLEX;
315 case SPECIFIER_LONG | SPECIFIER_DOUBLE | SPECIFIER_COMPLEX:
316 atomic_type = ATOMIC_TYPE_LONG_DOUBLE_COMPLEX;
319 #ifdef PROVIDE_IMAGINARY
320 case SPECIFIER_FLOAT | SPECIFIER_IMAGINARY:
321 atomic_type = ATOMIC_TYPE_FLOAT_IMAGINARY;
323 case SPECIFIER_DOUBLE | SPECIFIER_IMAGINARY:
324 atomic_type = ATOMIC_TYPE_DOUBLE_IMAGINARY;
326 case SPECIFIER_LONG | SPECIFIER_DOUBLE | SPECIFIER_IMAGINARY:
327 atomic_type = ATOMIC_TYPE_LONG_DOUBLE_IMAGINARY;
331 /* invalid specifier combination, give an error message */
332 if(type_specifiers == 0) {
333 parse_error("no type specifiers given in declaration");
334 } else if((type_specifiers & SPECIFIER_SIGNED) &&
335 (type_specifiers & SPECIFIER_UNSIGNED)) {
336 parse_error("signed and unsigned specifiers gives");
337 } else if(type_specifiers & (SPECIFIER_SIGNED | SPECIFIER_UNSIGNED)) {
338 parse_error("only integer types can be signed or unsigned");
340 parse_error("multiple datatypes in declaration");
342 atomic_type = ATOMIC_TYPE_INVALID;
345 atomic_type_t *type = obstack_alloc(type_obst, sizeof(type[0]));
346 memset(type, 0, sizeof(type[0]));
347 type->type.type = TYPE_ATOMIC;
348 type->type.qualifiers = type_qualifiers;
349 type->atype = atomic_type;
351 type_t *result = typehash_insert((type_t*) type);
352 if(result != (type_t*) type) {
353 obstack_free(type_obst, type);
356 specifiers->type = result;
358 fprintf(stderr, "Specifiers type: ");
359 print_type(stderr, result);
360 fprintf(stderr, "\n");
362 if(type_specifiers != 0) {
363 parse_error("multiple datatypes in declaration");
369 unsigned parse_type_qualifiers()
371 unsigned type_qualifiers = 0;
375 /* type qualifiers */
376 MATCH_TYPE_QUALIFIER(T_const, TYPE_QUALIFIER_CONST);
377 MATCH_TYPE_QUALIFIER(T_restrict, TYPE_QUALIFIER_RESTRICT);
378 MATCH_TYPE_QUALIFIER(T_volatile, TYPE_QUALIFIER_VOLATILE);
379 MATCH_TYPE_QUALIFIER(T_inline, TYPE_QUALIFIER_INLINE);
382 return type_qualifiers;
388 void parse_declarator(const declaration_specifiers_t *specifiers)
390 type_t *type = specifiers->type;
392 while(token.type == '*') {
396 pointer_type_t *pointer_type
397 = obstack_alloc(type_obst, sizeof(pointer_type[0]));
398 memset(pointer_type, 0, sizeof(pointer_type[0]));
399 pointer_type->type.type = TYPE_POINTER;
400 pointer_type->points_to = type;
402 pointer_type->type.qualifiers = parse_type_qualifiers();
404 type_t *result = typehash_insert((type_t*) pointer_type);
405 if(result != (type_t*) pointer_type) {
406 obstack_free(type_obst, pointer_type);
414 (void) token.v.symbol;
419 parse_declarator(specifiers);
423 parse_error("problem while parsing declarator");
426 if(token.type == '(') {
429 /* parse parameter-type-list or identifier-list */
432 } else if(token.type == '[') {
435 /* multiple type qualifiers, and static */
437 /* assignment_expression or '*' or nothing */
442 fprintf(stderr, "Declarator type: ");
443 print_type(stderr, type);
444 fprintf(stderr, "\n");
447 void parse_init_declarators(const declaration_specifiers_t *specifiers)
449 parse_declarator(specifiers);
450 if(token.type == '=') {
452 //parse_initialize();
456 void parse_declaration(void)
458 declaration_specifiers_t specifiers;
459 memset(&specifiers, 0, sizeof(specifiers));
460 parse_declaration_specifiers(&specifiers);
462 parse_init_declarators(&specifiers);
468 expression_t *parse_sub_expression(unsigned precedence);
470 expression_t *parse_expression(void);
472 typedef expression_t* (*parse_expression_function) (unsigned precedence);
473 typedef expression_t* (*parse_expression_infix_function) (unsigned precedence,
476 typedef struct expression_parser_function_t expression_parser_function_t;
477 struct expression_parser_function_t {
479 parse_expression_function parser;
480 unsigned infix_precedence;
481 parse_expression_infix_function infix_parser;
484 expression_parser_function_t expression_parsers[T_LAST_TOKEN];
487 expression_t *expected_expression_error(void)
489 parser_print_error_prefix();
490 fprintf(stderr, "expected expression, got token ");
491 print_token(stderr, & token);
492 fprintf(stderr, "\n");
494 expression_t *expression = allocate_ast_zero(sizeof(expression[0]));
495 expression->type = EXPR_INVALID;
502 expression_t *parse_string_const(void)
504 string_literal_t *cnst = allocate_ast_zero(sizeof(cnst[0]));
506 cnst->expression.type = EXPR_STRING_LITERAL;
507 cnst->value = token.v.string;
511 return (expression_t*) cnst;
515 expression_t *parse_int_const(void)
517 const_t *cnst = allocate_ast_zero(sizeof(cnst[0]));
519 cnst->expression.type = EXPR_CONST;
520 cnst->value = token.v.intvalue;
524 return (expression_t*) cnst;
528 expression_t *parse_reference(void)
530 reference_expression_t *ref = allocate_ast_zero(sizeof(ref[0]));
532 ref->expression.type = EXPR_REFERENCE;
533 ref->symbol = token.v.symbol;
537 return (expression_t*) ref;
541 expression_t *parse_brace_expression(void)
545 expression_t *result = parse_expression();
552 expression_t *parse_primary_expression(void)
556 return parse_int_const();
557 case T_STRING_LITERAL:
558 return parse_string_const();
560 return parse_reference();
562 return parse_brace_expression();
565 /* TODO: error message */
570 expression_t *parse_array_expression(unsigned precedence,
571 expression_t *array_ref)
577 array_access_expression_t *array_access
578 = allocate_ast_zero(sizeof(array_access[0]));
580 array_access->expression.type = EXPR_ARRAY_ACCESS;
581 array_access->array_ref = array_ref;
582 array_access->index = parse_expression();
584 if(token.type != ']') {
585 parse_error_expected("Problem while parsing array access", ']', 0);
590 return (expression_t*) array_access;
594 expression_t *parse_sizeof(unsigned precedence)
604 expression_t *parse_select_expression(unsigned precedence,
605 expression_t *compound)
609 assert(token.type == '.' || token.type == T_SELECT);
612 select_expression_t *select = allocate_ast_zero(sizeof(select[0]));
614 select->expression.type = EXPR_SELECT;
615 select->compound = compound;
617 if(token.type != T_IDENTIFIER) {
618 parse_error_expected("Problem while parsing compound select",
622 select->symbol = token.v.symbol;
625 return (expression_t*) select;
629 expression_t *parse_call_expression(unsigned precedence,
630 expression_t *expression)
633 call_expression_t *call = allocate_ast_zero(sizeof(call[0]));
635 call->expression.type = EXPR_CALL;
636 call->method = expression;
638 /* parse arguments */
641 if(token.type != ')') {
642 call_argument_t *last_argument = NULL;
645 call_argument_t *argument = allocate_ast_zero(sizeof(argument[0]));
647 argument->expression = parse_expression();
648 if(last_argument == NULL) {
649 call->arguments = argument;
651 last_argument->next = argument;
653 last_argument = argument;
655 if(token.type != ',')
662 return (expression_t*) call;
665 #define CREATE_UNARY_EXPRESSION_PARSER(token_type, unexpression_type) \
667 expression_t *parse_##unexpression_type(unsigned precedence) \
671 unary_expression_t *unary_expression \
672 = allocate_ast_zero(sizeof(unary_expression[0])); \
673 unary_expression->expression.type = EXPR_UNARY; \
674 unary_expression->type = unexpression_type; \
675 unary_expression->value = parse_sub_expression(precedence); \
677 return (expression_t*) unary_expression; \
680 CREATE_UNARY_EXPRESSION_PARSER('-', UNEXPR_NEGATE);
681 CREATE_UNARY_EXPRESSION_PARSER('+', UNEXPR_PLUS);
682 CREATE_UNARY_EXPRESSION_PARSER('!', UNEXPR_NOT);
683 CREATE_UNARY_EXPRESSION_PARSER('*', UNEXPR_DEREFERENCE);
684 CREATE_UNARY_EXPRESSION_PARSER('&', UNEXPR_TAKE_ADDRESS);
685 CREATE_UNARY_EXPRESSION_PARSER('~', UNEXPR_BITWISE_NEGATE);
686 CREATE_UNARY_EXPRESSION_PARSER(T_PLUSPLUS, UNEXPR_PREFIX_INCREMENT);
687 CREATE_UNARY_EXPRESSION_PARSER(T_MINUSMINUS, UNEXPR_PREFIX_DECREMENT);
689 #define CREATE_UNARY_POSTFIX_EXPRESSION_PARSER(token_type, unexpression_type) \
691 expression_t *parse_##unexpression_type(unsigned precedence, \
692 expression_t *left) \
697 unary_expression_t *unary_expression \
698 = allocate_ast_zero(sizeof(unary_expression[0])); \
699 unary_expression->expression.type = EXPR_UNARY; \
700 unary_expression->type = unexpression_type; \
701 unary_expression->value = left; \
703 return (expression_t*) unary_expression; \
706 CREATE_UNARY_POSTFIX_EXPRESSION_PARSER(T_PLUSPLUS, UNEXPR_POSTFIX_INCREMENT);
707 CREATE_UNARY_POSTFIX_EXPRESSION_PARSER(T_MINUSMINUS, UNEXPR_POSTFIX_DECREMENT);
709 #define CREATE_BINEXPR_PARSER(token_type, binexpression_type) \
711 expression_t *parse_##binexpression_type(unsigned precedence, \
712 expression_t *left) \
716 expression_t *right = parse_sub_expression(precedence); \
718 binary_expression_t *binexpr \
719 = allocate_ast_zero(sizeof(binexpr[0])); \
720 binexpr->expression.type = EXPR_BINARY; \
721 binexpr->type = binexpression_type; \
722 binexpr->left = left; \
723 binexpr->right = right; \
725 return (expression_t*) binexpr; \
728 CREATE_BINEXPR_PARSER('*', BINEXPR_MUL);
729 CREATE_BINEXPR_PARSER('/', BINEXPR_DIV);
730 CREATE_BINEXPR_PARSER('+', BINEXPR_ADD);
731 CREATE_BINEXPR_PARSER('-', BINEXPR_SUB);
732 CREATE_BINEXPR_PARSER('<', BINEXPR_LESS);
733 CREATE_BINEXPR_PARSER('>', BINEXPR_GREATER);
734 CREATE_BINEXPR_PARSER('=', BINEXPR_ASSIGN);
735 CREATE_BINEXPR_PARSER(T_EQUALEQUAL, BINEXPR_EQUAL);
736 CREATE_BINEXPR_PARSER(T_SLASHEQUAL, BINEXPR_NOTEQUAL);
737 CREATE_BINEXPR_PARSER(T_LESSEQUAL, BINEXPR_LESSEQUAL);
738 CREATE_BINEXPR_PARSER(T_GREATEREQUAL, BINEXPR_GREATEREQUAL);
739 CREATE_BINEXPR_PARSER('&', BINEXPR_BITWISE_AND);
740 CREATE_BINEXPR_PARSER('|', BINEXPR_BITWISE_OR);
741 CREATE_BINEXPR_PARSER('^', BINEXPR_BITWISE_XOR);
742 CREATE_BINEXPR_PARSER(T_LESSLESS, BINEXPR_SHIFTLEFT);
743 CREATE_BINEXPR_PARSER(T_GREATERGREATER, BINEXPR_SHIFTRIGHT);
746 expression_t *parse_sub_expression(unsigned precedence)
749 return expected_expression_error();
752 expression_parser_function_t *parser
753 = &expression_parsers[token.type];
754 source_position_t source_position = source_position;
757 if(parser->parser != NULL) {
758 left = parser->parser(parser->precedence);
760 left = parse_primary_expression();
763 left->source_position = source_position;
767 return expected_expression_error();
770 parser = &expression_parsers[token.type];
771 if(parser->infix_parser == NULL)
773 if(parser->infix_precedence < precedence)
776 left = parser->infix_parser(parser->infix_precedence, left);
778 left->source_position = source_position;
785 expression_t *parse_expression(void)
787 return parse_sub_expression(1);
792 void register_expression_parser(parse_expression_function parser,
793 int token_type, unsigned precedence)
795 expression_parser_function_t *entry = &expression_parsers[token_type];
797 if(entry->parser != NULL) {
798 fprintf(stderr, "for token ");
799 print_token_type(stderr, token_type);
800 fprintf(stderr, "\n");
801 panic("trying to register multiple expression parsers for a token");
803 entry->parser = parser;
804 entry->precedence = precedence;
807 void register_expression_infix_parser(parse_expression_infix_function parser,
808 int token_type, unsigned precedence)
810 expression_parser_function_t *entry = &expression_parsers[token_type];
812 if(entry->infix_parser != NULL) {
813 fprintf(stderr, "for token ");
814 print_token_type(stderr, token_type);
815 fprintf(stderr, "\n");
816 panic("trying to register multiple infix expression parsers for a "
819 entry->infix_parser = parser;
820 entry->infix_precedence = precedence;
824 void init_expression_parsers(void)
826 memset(&expression_parsers, 0, sizeof(expression_parsers));
828 register_expression_infix_parser(parse_BINEXPR_MUL, '*', 16);
829 register_expression_infix_parser(parse_BINEXPR_DIV, '/', 16);
830 register_expression_infix_parser(parse_BINEXPR_SHIFTLEFT,
832 register_expression_infix_parser(parse_BINEXPR_SHIFTRIGHT,
833 T_GREATERGREATER, 16);
834 register_expression_infix_parser(parse_BINEXPR_ADD, '+', 15);
835 register_expression_infix_parser(parse_BINEXPR_SUB, '-', 15);
836 register_expression_infix_parser(parse_BINEXPR_LESS, '<', 14);
837 register_expression_infix_parser(parse_BINEXPR_GREATER, '>', 14);
838 register_expression_infix_parser(parse_BINEXPR_LESSEQUAL, T_LESSEQUAL, 14);
839 register_expression_infix_parser(parse_BINEXPR_GREATEREQUAL,
841 register_expression_infix_parser(parse_BINEXPR_EQUAL, T_EQUALEQUAL, 13);
842 register_expression_infix_parser(parse_BINEXPR_NOTEQUAL,
843 T_EXCLAMATIONMARKEQUAL, 13);
844 register_expression_infix_parser(parse_BINEXPR_BITWISE_AND, '&', 12);
845 register_expression_infix_parser(parse_BINEXPR_BITWISE_XOR, '^', 11);
846 register_expression_infix_parser(parse_BINEXPR_BITWISE_OR, '|', 10);
847 register_expression_infix_parser(parse_BINEXPR_ASSIGN, T_EQUAL, 2);
849 register_expression_infix_parser(parse_array_expression, '[', 30);
850 register_expression_infix_parser(parse_call_expression, '(', 30);
851 register_expression_infix_parser(parse_select_expression, '.', 30);
852 register_expression_infix_parser(parse_select_expression, T_SELECT, 30);
853 register_expression_infix_parser(parse_UNEXPR_POSTFIX_INCREMENT,
855 register_expression_infix_parser(parse_UNEXPR_POSTFIX_DECREMENT,
858 register_expression_parser(parse_UNEXPR_NEGATE, '-', 25);
859 register_expression_parser(parse_UNEXPR_PLUS, '+', 25);
860 register_expression_parser(parse_UNEXPR_NOT, '!', 25);
861 register_expression_parser(parse_UNEXPR_BITWISE_NEGATE, '~', 25);
862 register_expression_parser(parse_UNEXPR_DEREFERENCE, '*', 25);
863 register_expression_parser(parse_UNEXPR_TAKE_ADDRESS, '&', 25);
864 register_expression_parser(parse_UNEXPR_PREFIX_INCREMENT, T_PLUSPLUS, 25);
865 register_expression_parser(parse_UNEXPR_PREFIX_DECREMENT, T_MINUSMINUS, 25);
866 register_expression_parser(parse_sizeof, T_sizeof, 25);
871 statement_t *parse_compound_statement(void);
874 statement_t *parse_statement(void);
877 statement_t *parse_case_statement(void)
888 statement_t *parse_default_statement(void)
898 statement_t *parse_label_statement(void)
908 statement_t *parse_if(void)
916 if(token.type == T_else) {
925 statement_t *parse_switch(void)
937 statement_t *parse_while(void)
949 statement_t *parse_do(void)
962 statement_t *parse_for(void)
966 if(token.type != ';') {
967 /* TODO not correct... this could also be a declaration */
971 if(token.type != ';') {
975 if(token.type != ')') {
985 statement_t *parse_goto(void)
988 expect(T_IDENTIFIER);
995 statement_t *parse_continue(void)
1004 statement_t *parse_break(void)
1013 statement_t *parse_return(void)
1023 statement_t *parse_statement(void)
1025 statement_t *statement = NULL;
1027 /* declaration or statement */
1028 switch(token.type) {
1030 statement = parse_case_statement();
1034 statement = parse_default_statement();
1038 statement = parse_label_statement();
1042 statement = parse_compound_statement();
1046 statement = parse_if();
1050 statement = parse_switch();
1054 statement = parse_while();
1058 statement = parse_do();
1062 statement = parse_for();
1066 statement = parse_goto();
1070 statement = parse_continue();
1074 statement = parse_break();
1078 statement = parse_return();
1090 statement_t *parse_compound_statement(void)
1094 while(token.type != '}') {
1103 void parse_translation_unit(void)
1106 declaration_specifiers_t specifiers;
1107 memset(&specifiers, 0, sizeof(specifiers));
1108 parse_declaration_specifiers(&specifiers);
1111 while(token.type != T_EOF) {
1112 if(token.type == '{') {
1117 parse_declaration();
1118 /* multiple declarations? */
1120 if(token.type == '{') {
1121 parse_compound_statement();
1122 } else if(token.type == ';') {
1125 parse_error_expected("while parsing declarations", '{', ';', 0);
1133 parse_translation_unit();
1136 void init_parser(void)
1138 init_expression_parsers();
1141 void exit_parser(void)