2 * This file is part of cparser.
3 * Copyright (C) 2007-2009 Matthias Braun <matze@braunis.de>
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License
7 * as published by the Free Software Foundation; either version 2
8 * of the License, or (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
23 #include <libfirm/firm_types.h>
33 /** The AST obstack contains all data that must stay in the AST. */
34 extern struct obstack ast_obstack;
37 * Operator precedence classes
39 typedef enum precedence_t {
41 PREC_EXPRESSION, /* , left to right */
42 PREC_ASSIGNMENT, /* = += -= *= /= %= <<= >>= &= ^= |= right to left */
43 PREC_CONDITIONAL, /* ?: right to left */
44 PREC_LOGICAL_OR, /* || left to right */
45 PREC_LOGICAL_AND, /* && left to right */
46 PREC_OR, /* | left to right */
47 PREC_XOR, /* ^ left to right */
48 PREC_AND, /* & left to right */
49 PREC_EQUALITY, /* == != left to right */
50 PREC_RELATIONAL, /* < <= > >= left to right */
51 PREC_SHIFT, /* << >> left to right */
52 PREC_ADDITIVE, /* + - left to right */
53 PREC_MULTIPLICATIVE, /* * / % left to right */
54 PREC_CAST, /* (type) right to left */
55 PREC_UNARY, /* ! ~ ++ -- + - * & sizeof right to left */
56 PREC_POSTFIX, /* () [] -> . left to right */
64 typedef enum expression_kind_t {
68 EXPR_REFERENCE_ENUM_VALUE,
70 EXPR_CHARACTER_CONSTANT,
71 EXPR_WIDE_CHARACTER_CONSTANT,
73 EXPR_WIDE_STRING_LITERAL,
74 EXPR_COMPOUND_LITERAL,
84 EXPR_BUILTIN_CONSTANT_P,
85 EXPR_BUILTIN_TYPES_COMPATIBLE_P,
91 EXPR_LABEL_ADDRESS, /**< GCC extension &&label operator */
94 EXPR_UNARY_NEGATE = EXPR_UNARY_FIRST,
96 EXPR_UNARY_BITWISE_NEGATE,
98 EXPR_UNARY_DEREFERENCE,
99 EXPR_UNARY_TAKE_ADDRESS,
100 EXPR_UNARY_POSTFIX_INCREMENT,
101 EXPR_UNARY_POSTFIX_DECREMENT,
102 EXPR_UNARY_PREFIX_INCREMENT,
103 EXPR_UNARY_PREFIX_DECREMENT,
105 EXPR_UNARY_CAST_IMPLICIT, /**< compiler generated cast */
106 EXPR_UNARY_ASSUME, /**< MS __assume() */
108 EXPR_UNARY_DELETE_ARRAY,
110 EXPR_UNARY_LAST = EXPR_UNARY_THROW,
113 EXPR_BINARY_ADD = EXPR_BINARY_FIRST,
119 EXPR_BINARY_NOTEQUAL,
121 EXPR_BINARY_LESSEQUAL,
123 EXPR_BINARY_GREATEREQUAL,
124 EXPR_BINARY_BITWISE_AND,
125 EXPR_BINARY_BITWISE_OR,
126 EXPR_BINARY_BITWISE_XOR,
127 EXPR_BINARY_LOGICAL_AND,
128 EXPR_BINARY_LOGICAL_OR,
129 EXPR_BINARY_SHIFTLEFT,
130 EXPR_BINARY_SHIFTRIGHT,
132 EXPR_BINARY_MUL_ASSIGN,
133 EXPR_BINARY_DIV_ASSIGN,
134 EXPR_BINARY_MOD_ASSIGN,
135 EXPR_BINARY_ADD_ASSIGN,
136 EXPR_BINARY_SUB_ASSIGN,
137 EXPR_BINARY_SHIFTLEFT_ASSIGN,
138 EXPR_BINARY_SHIFTRIGHT_ASSIGN,
139 EXPR_BINARY_BITWISE_AND_ASSIGN,
140 EXPR_BINARY_BITWISE_XOR_ASSIGN,
141 EXPR_BINARY_BITWISE_OR_ASSIGN,
144 EXPR_BINARY_ISGREATER,
145 EXPR_BINARY_ISGREATEREQUAL,
147 EXPR_BINARY_ISLESSEQUAL,
148 EXPR_BINARY_ISLESSGREATER,
149 EXPR_BINARY_ISUNORDERED,
150 EXPR_BINARY_LAST = EXPR_BINARY_ISUNORDERED,
153 typedef enum funcname_kind_t {
154 FUNCNAME_FUNCTION, /**< C99 __func__, older __FUNCTION__ */
155 FUNCNAME_PRETTY_FUNCTION, /**< GNUC __PRETTY_FUNCTION__ */
156 FUNCNAME_FUNCSIG, /**< MS __FUNCSIG__ */
157 FUNCNAME_FUNCDNAME /**< MS __FUNCDNAME__ */
160 /* convenience macros */
161 #define EXPR_BINARY_CASES \
162 case EXPR_BINARY_ADD: \
163 case EXPR_BINARY_SUB: \
164 case EXPR_BINARY_MUL: \
165 case EXPR_BINARY_DIV: \
166 case EXPR_BINARY_MOD: \
167 case EXPR_BINARY_EQUAL: \
168 case EXPR_BINARY_NOTEQUAL: \
169 case EXPR_BINARY_LESS: \
170 case EXPR_BINARY_LESSEQUAL: \
171 case EXPR_BINARY_GREATER: \
172 case EXPR_BINARY_GREATEREQUAL: \
173 case EXPR_BINARY_BITWISE_AND: \
174 case EXPR_BINARY_BITWISE_OR: \
175 case EXPR_BINARY_BITWISE_XOR: \
176 case EXPR_BINARY_LOGICAL_AND: \
177 case EXPR_BINARY_LOGICAL_OR: \
178 case EXPR_BINARY_SHIFTLEFT: \
179 case EXPR_BINARY_SHIFTRIGHT: \
180 case EXPR_BINARY_ASSIGN: \
181 case EXPR_BINARY_MUL_ASSIGN: \
182 case EXPR_BINARY_DIV_ASSIGN: \
183 case EXPR_BINARY_MOD_ASSIGN: \
184 case EXPR_BINARY_ADD_ASSIGN: \
185 case EXPR_BINARY_SUB_ASSIGN: \
186 case EXPR_BINARY_SHIFTLEFT_ASSIGN: \
187 case EXPR_BINARY_SHIFTRIGHT_ASSIGN: \
188 case EXPR_BINARY_BITWISE_AND_ASSIGN: \
189 case EXPR_BINARY_BITWISE_XOR_ASSIGN: \
190 case EXPR_BINARY_BITWISE_OR_ASSIGN: \
191 case EXPR_BINARY_COMMA: \
192 case EXPR_BINARY_ISGREATER: \
193 case EXPR_BINARY_ISGREATEREQUAL: \
194 case EXPR_BINARY_ISLESS: \
195 case EXPR_BINARY_ISLESSEQUAL: \
196 case EXPR_BINARY_ISLESSGREATER: \
197 case EXPR_BINARY_ISUNORDERED:
200 * unary expression with mandatory operand
202 #define EXPR_UNARY_CASES_MANDATORY \
203 case EXPR_UNARY_NEGATE: \
204 case EXPR_UNARY_PLUS: \
205 case EXPR_UNARY_BITWISE_NEGATE: \
206 case EXPR_UNARY_NOT: \
207 case EXPR_UNARY_DEREFERENCE: \
208 case EXPR_UNARY_TAKE_ADDRESS: \
209 case EXPR_UNARY_POSTFIX_INCREMENT: \
210 case EXPR_UNARY_POSTFIX_DECREMENT: \
211 case EXPR_UNARY_PREFIX_INCREMENT: \
212 case EXPR_UNARY_PREFIX_DECREMENT: \
213 case EXPR_UNARY_CAST: \
214 case EXPR_UNARY_CAST_IMPLICIT: \
215 case EXPR_UNARY_ASSUME: \
216 case EXPR_UNARY_DELETE: \
217 case EXPR_UNARY_DELETE_ARRAY:
220 * unary expression with optional operand
222 #define EXPR_UNARY_CASES_OPTIONAL \
223 case EXPR_UNARY_THROW: \
225 #define EXPR_UNARY_CASES \
226 EXPR_UNARY_CASES_MANDATORY \
227 EXPR_UNARY_CASES_OPTIONAL
230 * The base class of every expression.
232 struct expression_base_t {
233 expression_kind_t kind; /**< The expression kind. */
234 type_t *type; /**< The type of the expression. */
235 source_position_t source_position; /**< The source position of this expression. */
236 bool parenthesized : 1;
238 bool transformed : 1; /**< Set if this expression was transformed. */
245 struct const_expression_t {
246 expression_base_t base;
249 long double float_value;
251 wide_string_t wide_character;
253 bool is_ms_noop; /**< True, if this constant is the result
254 of an microsoft __noop operator */
257 struct string_literal_expression_t {
258 expression_base_t base;
262 struct funcname_expression_t {
263 expression_base_t base;
264 funcname_kind_t kind;
265 string_t value; /**< the value once assigned. */
268 struct wide_string_literal_expression_t {
269 expression_base_t base;
273 struct compound_literal_expression_t {
274 expression_base_t base;
276 initializer_t *initializer;
279 struct builtin_constant_expression_t {
280 expression_base_t base;
284 struct builtin_types_compatible_expression_t {
285 expression_base_t base;
290 struct reference_expression_t {
291 expression_base_t base;
296 * An argument of a call.
298 struct call_argument_t {
299 expression_t *expression; /**< The expression which value is transmitted. */
300 call_argument_t *next; /**< Links to the next argument of this call. */
304 struct call_expression_t {
305 expression_base_t base;
306 expression_t *function; /**< The address of the function to call. */
307 call_argument_t *arguments; /**< List of arguments of this call. */
311 struct unary_expression_t {
312 expression_base_t base;
313 expression_t *value; /**< The unary operand. */
316 struct binary_expression_t {
317 expression_base_t base;
322 struct select_expression_t {
323 expression_base_t base;
324 expression_t *compound;
325 entity_t *compound_entry;
326 bool implicit : 1; /**< compiler generated select
327 (for anonymous struct/union) */
330 struct array_access_expression_t {
331 expression_base_t base;
332 expression_t *array_ref; /**< the referenced array */
333 expression_t *index; /**< the index used */
334 bool flipped; /**< True if index/ref was written in a 5[a] way */
337 struct typeprop_expression_t {
338 expression_base_t base;
340 expression_t *tp_expression;
343 struct designator_t {
344 source_position_t source_position;
345 symbol_t *symbol; /**< the symbol if any */
346 expression_t *array_index; /**< the array index if any */
350 struct offsetof_expression_t {
351 expression_base_t base;
353 designator_t *designator;
356 struct va_start_expression_t {
357 expression_base_t base;
359 variable_t *parameter;
362 struct va_arg_expression_t {
363 expression_base_t base;
367 struct va_copy_expression_t {
368 expression_base_t base;
369 expression_t *dst; /**< destination argument */
370 expression_t *src; /**< source argument */
373 struct conditional_expression_t {
374 expression_base_t base;
375 expression_t *condition;
376 expression_t *true_expression;
377 expression_t *false_expression;
380 struct statement_expression_t {
381 expression_base_t base;
382 statement_t *statement;
385 struct classify_type_expression_t {
386 expression_base_t base;
387 expression_t *type_expression;
390 struct label_address_expression_t {
391 expression_base_t base;
396 expression_kind_t kind;
397 expression_base_t base;
398 const_expression_t conste;
399 funcname_expression_t funcname;
400 string_literal_expression_t string;
401 wide_string_literal_expression_t wide_string;
402 compound_literal_expression_t compound_literal;
403 builtin_constant_expression_t builtin_constant;
404 builtin_types_compatible_expression_t builtin_types_compatible;
405 reference_expression_t reference;
406 call_expression_t call;
407 unary_expression_t unary;
408 binary_expression_t binary;
409 select_expression_t select;
410 array_access_expression_t array_access;
411 typeprop_expression_t typeprop;
412 offsetof_expression_t offsetofe;
413 va_start_expression_t va_starte;
414 va_arg_expression_t va_arge;
415 va_copy_expression_t va_copye;
416 conditional_expression_t conditional;
417 statement_expression_t statement;
418 classify_type_expression_t classify_type;
419 label_address_expression_t label_address;
422 typedef enum initializer_kind_t {
426 INITIALIZER_WIDE_STRING,
427 INITIALIZER_DESIGNATOR
428 } initializer_kind_t;
430 struct initializer_base_t {
431 initializer_kind_t kind;
434 struct initializer_value_t {
435 initializer_base_t base;
439 struct initializer_list_t {
440 initializer_base_t base;
442 initializer_t *initializers[];
445 struct initializer_string_t {
446 initializer_base_t base;
450 struct initializer_wide_string_t {
451 initializer_base_t base;
452 wide_string_t string;
455 struct initializer_designator_t {
456 initializer_base_t base;
457 designator_t *designator;
460 union initializer_t {
461 initializer_kind_t kind;
462 initializer_base_t base;
463 initializer_value_t value;
464 initializer_list_t list;
465 initializer_string_t string;
466 initializer_wide_string_t wide_string;
467 initializer_designator_t designator;
471 * The statement kinds.
473 typedef enum statement_kind_t {
478 STATEMENT_DECLARATION,
481 STATEMENT_EXPRESSION,
486 STATEMENT_CASE_LABEL,
491 STATEMENT_MS_TRY, /**< MS __try/__finally or __try/__except */
492 STATEMENT_LEAVE /**< MS __leave */
496 * The base class of every statement.
498 struct statement_base_t {
499 statement_kind_t kind;
500 statement_t *next; /**< Point to the next statement in a compound statement. */
501 source_position_t source_position;
502 statement_t *parent; /**< The Parent statement that controls the execution. */
503 bool reachable; /**< True, if this statement is reachable. */
509 struct invalid_statement_t {
510 statement_base_t base;
513 struct empty_statement_t {
514 statement_base_t base;
517 struct return_statement_t {
518 statement_base_t base;
519 expression_t *value; /**< The return value if any. */
522 struct compound_statement_t {
523 statement_base_t base;
524 statement_t *statements;
526 bool stmt_expr; /**< True if this compound statement is a statement expression. */
529 struct declaration_statement_t {
530 statement_base_t base;
531 entity_t *declarations_begin;
532 entity_t *declarations_end;
535 struct if_statement_t {
536 statement_base_t base;
537 expression_t *condition;
538 statement_t *true_statement;
539 statement_t *false_statement;
542 struct switch_statement_t {
543 statement_base_t base;
544 expression_t *expression;
546 case_label_statement_t *first_case, *last_case; /**< List of all cases, including default. */
547 case_label_statement_t *default_label; /**< The default label if existent. */
548 unsigned long default_proj_nr; /**< The Proj-number for the default Proj. */
551 struct goto_statement_t {
552 statement_base_t base;
553 label_t *label; /**< The destination label. */
554 expression_t *expression; /**< The expression for an assigned goto. */
555 goto_statement_t *next; /**< links all goto statements of a function */
558 struct case_label_statement_t {
559 statement_base_t base;
560 expression_t *expression; /**< The case label expression, NULL for default label. */
561 expression_t *end_range; /**< For GNUC case a .. b: the end range expression, NULL else. */
562 case_label_statement_t *next; /**< link to the next case label in switch */
563 statement_t *statement;
564 long first_case; /**< The folded value of expression. */
565 long last_case; /**< The folded value of end_range. */
566 bool is_bad; /**< If set marked as bad to suppress warnings. */
567 bool is_empty_range; /**< If set marked this as an empty range. */
570 struct label_statement_t {
571 statement_base_t base;
573 statement_t *statement;
574 label_statement_t *next; /**< links all label statements of a function */
577 struct expression_statement_t {
578 statement_base_t base;
579 expression_t *expression;
582 struct while_statement_t {
583 statement_base_t base;
584 expression_t *condition;
588 struct do_while_statement_t {
589 statement_base_t base;
590 expression_t *condition;
594 struct for_statement_t {
595 statement_base_t base;
596 expression_t *initialisation;
597 expression_t *condition;
601 bool condition_reachable:1;
602 bool step_reachable:1;
605 struct asm_argument_t {
606 string_t constraints;
607 expression_t *expression;
609 asm_argument_t *next;
612 struct asm_clobber_t {
617 struct asm_statement_t {
618 statement_base_t base;
620 asm_argument_t *inputs;
621 asm_argument_t *outputs;
622 asm_clobber_t *clobbers;
626 struct ms_try_statement_t {
627 statement_base_t base;
628 statement_t *try_statement;
629 expression_t *except_expression; /**< non-null for except, NULL for finally */
630 statement_t *final_statement;
633 struct leave_statement_t {
634 statement_base_t base;
638 statement_kind_t kind;
639 statement_base_t base;
640 return_statement_t returns;
641 compound_statement_t compound;
642 declaration_statement_t declaration;
644 switch_statement_t switchs;
645 goto_statement_t gotos;
646 case_label_statement_t case_label;
647 label_statement_t label;
648 expression_statement_t expression;
649 while_statement_t whiles;
650 do_while_statement_t do_while;
651 for_statement_t fors;
652 asm_statement_t asms;
653 ms_try_statement_t ms_try;
654 leave_statement_t leave;
657 struct translation_unit_t {
659 statement_t *global_asm;
662 static inline void *_allocate_ast(size_t size)
664 return obstack_alloc(&ast_obstack, size);
667 static inline bool is_invalid_expression(expression_t *expression)
669 return expression->base.kind == EXPR_INVALID;
672 static inline bool is_invalid_statement(statement_t *statement)
674 return statement->base.kind == STATEMENT_INVALID;
677 #define allocate_ast(size) _allocate_ast(size)
680 * Allocate an AST node with given size and
681 * initialize all fields with zero.
683 static inline void *allocate_ast_zero(size_t size)
685 void *res = allocate_ast(size);
686 memset(res, 0, size);