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 {
70 EXPR_LITERAL_FLOATINGPOINT,
71 EXPR_LITERAL_CHARACTER,
72 EXPR_LITERAL_WIDE_CHARACTER,
73 EXPR_LITERAL_MS_NOOP, /**< MS __noop extension */
75 EXPR_COMPOUND_LITERAL,
85 EXPR_BUILTIN_CONSTANT_P,
86 EXPR_BUILTIN_TYPES_COMPATIBLE_P,
92 EXPR_LABEL_ADDRESS, /**< GCC extension &&label operator */
95 EXPR_UNARY_NEGATE = EXPR_UNARY_FIRST,
97 EXPR_UNARY_BITWISE_NEGATE,
99 EXPR_UNARY_DEREFERENCE,
100 EXPR_UNARY_TAKE_ADDRESS,
101 EXPR_UNARY_POSTFIX_INCREMENT,
102 EXPR_UNARY_POSTFIX_DECREMENT,
103 EXPR_UNARY_PREFIX_INCREMENT,
104 EXPR_UNARY_PREFIX_DECREMENT,
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 \
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 \
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_ASSUME: \
215 case EXPR_UNARY_DELETE: \
216 case EXPR_UNARY_DELETE_ARRAY
219 * unary expression with optional operand
221 #define EXPR_UNARY_CASES_OPTIONAL \
224 #define EXPR_UNARY_CASES \
225 EXPR_UNARY_CASES_MANDATORY: \
226 case EXPR_UNARY_CASES_OPTIONAL
228 #define EXPR_LITERAL_CASES \
229 EXPR_LITERAL_BOOLEAN: \
230 case EXPR_LITERAL_INTEGER: \
231 case EXPR_LITERAL_FLOATINGPOINT: \
232 case EXPR_LITERAL_CHARACTER: \
233 case EXPR_LITERAL_WIDE_CHARACTER: \
234 case EXPR_LITERAL_MS_NOOP
237 * The base class of every expression.
239 struct expression_base_t {
240 expression_kind_t kind; /**< The expression kind. */
241 type_t *type; /**< The type of the expression. */
242 source_position_t source_position; /**< The source position of this expression. */
243 bool parenthesized : 1;
245 bool transformed : 1; /**< Set if this expression was transformed. */
247 bool implicit : 1; /**< compiler generated expression.
249 select into anonymous structs
255 * integer/float constants, character and string literals
257 struct literal_expression_t {
258 expression_base_t base;
263 ir_tarval *target_value;
266 struct string_literal_expression_t {
267 expression_base_t base;
268 string_encoding_t encoding;
272 struct funcname_expression_t {
273 expression_base_t base;
274 funcname_kind_t kind;
275 string_t value; /**< the value once assigned. */
278 struct compound_literal_expression_t {
279 expression_base_t base;
281 initializer_t *initializer;
284 struct builtin_constant_expression_t {
285 expression_base_t base;
289 struct builtin_types_compatible_expression_t {
290 expression_base_t base;
295 struct reference_expression_t {
296 expression_base_t base;
301 * An argument of a call.
303 struct call_argument_t {
304 expression_t *expression; /**< The expression which value is transmitted. */
305 call_argument_t *next; /**< Links to the next argument of this call. */
309 struct call_expression_t {
310 expression_base_t base;
311 expression_t *function; /**< The address of the function to call. */
312 call_argument_t *arguments; /**< List of arguments of this call. */
316 struct unary_expression_t {
317 expression_base_t base;
318 expression_t *value; /**< The unary operand. */
321 struct binary_expression_t {
322 expression_base_t base;
327 struct select_expression_t {
328 expression_base_t base;
329 expression_t *compound;
330 entity_t *compound_entry;
333 struct array_access_expression_t {
334 expression_base_t base;
335 expression_t *array_ref; /**< the referenced array */
336 expression_t *index; /**< the index used */
337 bool flipped; /**< True if index/ref was written in a 5[a] way */
340 struct typeprop_expression_t {
341 expression_base_t base;
343 expression_t *tp_expression;
346 struct designator_t {
347 source_position_t source_position;
348 symbol_t *symbol; /**< the symbol if any */
349 expression_t *array_index; /**< the array index if any */
353 struct offsetof_expression_t {
354 expression_base_t base;
356 designator_t *designator;
359 struct va_start_expression_t {
360 expression_base_t base;
362 expression_t *parameter;
365 struct va_arg_expression_t {
366 expression_base_t base;
370 struct va_copy_expression_t {
371 expression_base_t base;
372 expression_t *dst; /**< destination argument */
373 expression_t *src; /**< source argument */
376 struct conditional_expression_t {
377 expression_base_t base;
378 expression_t *condition;
379 expression_t *true_expression;
380 expression_t *false_expression;
383 struct statement_expression_t {
384 expression_base_t base;
385 statement_t *statement;
388 struct classify_type_expression_t {
389 expression_base_t base;
390 expression_t *type_expression;
393 struct label_address_expression_t {
394 expression_base_t base;
399 expression_kind_t kind;
400 expression_base_t base;
401 literal_expression_t literal;
402 string_literal_expression_t string_literal;
403 funcname_expression_t funcname;
404 compound_literal_expression_t compound_literal;
405 builtin_constant_expression_t builtin_constant;
406 builtin_types_compatible_expression_t builtin_types_compatible;
407 reference_expression_t reference;
408 call_expression_t call;
409 unary_expression_t unary;
410 binary_expression_t binary;
411 select_expression_t select;
412 array_access_expression_t array_access;
413 typeprop_expression_t typeprop;
414 offsetof_expression_t offsetofe;
415 va_start_expression_t va_starte;
416 va_arg_expression_t va_arge;
417 va_copy_expression_t va_copye;
418 conditional_expression_t conditional;
419 statement_expression_t statement;
420 classify_type_expression_t classify_type;
421 label_address_expression_t label_address;
424 typedef enum initializer_kind_t {
428 INITIALIZER_WIDE_STRING,
429 INITIALIZER_DESIGNATOR
430 } initializer_kind_t;
432 struct initializer_base_t {
433 initializer_kind_t kind;
436 struct initializer_value_t {
437 initializer_base_t base;
441 struct initializer_list_t {
442 initializer_base_t base;
444 initializer_t *initializers[];
447 struct initializer_string_t {
448 initializer_base_t base;
452 struct initializer_wide_string_t {
453 initializer_base_t base;
457 struct initializer_designator_t {
458 initializer_base_t base;
459 designator_t *designator;
462 union initializer_t {
463 initializer_kind_t kind;
464 initializer_base_t base;
465 initializer_value_t value;
466 initializer_list_t list;
467 initializer_string_t string;
468 initializer_wide_string_t wide_string;
469 initializer_designator_t designator;
473 * The statement kinds.
475 typedef enum statement_kind_t {
480 STATEMENT_DECLARATION,
483 STATEMENT_EXPRESSION,
486 STATEMENT_COMPUTED_GOTO,
489 STATEMENT_CASE_LABEL,
494 STATEMENT_MS_TRY, /**< MS __try/__finally or __try/__except */
495 STATEMENT_LEAVE /**< MS __leave */
499 * The base class of every statement.
501 struct statement_base_t {
502 statement_kind_t kind;
503 statement_t *next; /**< Point to the next statement in a compound statement. */
504 source_position_t source_position;
505 statement_t *parent; /**< The Parent statement that controls the execution. */
506 bool reachable; /**< True, if this statement is reachable. */
512 struct return_statement_t {
513 statement_base_t base;
514 expression_t *value; /**< The return value if any. */
517 struct compound_statement_t {
518 statement_base_t base;
519 statement_t *statements;
521 bool stmt_expr; /**< True if this compound statement is a statement expression. */
524 struct declaration_statement_t {
525 statement_base_t base;
526 entity_t *declarations_begin;
527 entity_t *declarations_end;
530 struct if_statement_t {
531 statement_base_t base;
533 expression_t *condition;
534 statement_t *true_statement;
535 statement_t *false_statement;
538 struct switch_statement_t {
539 statement_base_t base;
541 expression_t *expression;
543 case_label_statement_t *first_case, *last_case; /**< List of all cases, including default. */
544 case_label_statement_t *default_label; /**< The default label if existent. */
547 struct goto_statement_t {
548 statement_base_t base;
549 label_t *label; /**< The destination label. */
550 goto_statement_t *next; /**< links all goto statements of a function */
553 struct computed_goto_statement_t {
554 statement_base_t base;
555 expression_t *expression; /**< The expression for the computed goto. */
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. */
571 struct label_statement_t {
572 statement_base_t base;
574 statement_t *statement;
575 label_statement_t *next; /**< links all label statements of a function */
578 struct expression_statement_t {
579 statement_base_t base;
580 expression_t *expression;
583 struct while_statement_t {
584 statement_base_t base;
586 expression_t *condition;
590 struct do_while_statement_t {
591 statement_base_t base;
593 expression_t *condition;
597 struct for_statement_t {
598 statement_base_t base;
600 expression_t *initialisation;
601 expression_t *condition;
604 bool condition_reachable:1;
605 bool step_reachable:1;
608 struct asm_argument_t {
609 string_t constraints;
610 expression_t *expression;
612 asm_argument_t *next;
615 struct asm_clobber_t {
620 struct asm_statement_t {
621 statement_base_t base;
623 asm_argument_t *inputs;
624 asm_argument_t *outputs;
625 asm_clobber_t *clobbers;
629 struct ms_try_statement_t {
630 statement_base_t base;
631 statement_t *try_statement;
632 expression_t *except_expression; /**< non-null for except, NULL for finally */
633 statement_t *final_statement;
636 struct leave_statement_t {
637 statement_base_t base;
641 statement_kind_t kind;
642 statement_base_t base;
643 return_statement_t returns;
644 compound_statement_t compound;
645 declaration_statement_t declaration;
647 switch_statement_t switchs;
648 computed_goto_statement_t computed_goto;
649 goto_statement_t gotos;
650 case_label_statement_t case_label;
651 label_statement_t label;
652 expression_statement_t expression;
653 while_statement_t whiles;
654 do_while_statement_t do_while;
655 for_statement_t fors;
656 asm_statement_t asms;
657 ms_try_statement_t ms_try;
658 leave_statement_t leave;
661 struct translation_unit_t {
663 statement_t *global_asm;
667 * Allocate an AST node with given size and
668 * initialize all fields with zero.
670 static inline void *allocate_ast_zero(size_t size)
672 return memset(obstack_alloc(&ast_obstack, size), 0, size);
675 /** If set, implicit casts are printed. */
676 extern bool print_implicit_casts;
677 /** If set parenthesis are printed to indicate operator precedence. */
678 extern bool print_parenthesis;