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
26 #include "lang_features.h"
36 #if defined(__INTEL_COMPILER)
38 #elif defined(__CYGWIN__)
39 #include "win32/cygwin_math_ext.h"
44 #include "adt/error.h"
47 struct obstack ast_obstack;
50 static int case_indent;
52 bool print_implicit_casts = false;
53 bool print_parenthesis = false;
55 static void print_statement(const statement_t *statement);
56 static void print_expression_prec(const expression_t *expression, unsigned prec);
58 void change_indent(int delta)
64 void print_indent(void)
66 for (int i = 0; i < indent; ++i)
70 static void print_stringrep(const string_t *string)
72 for (size_t i = 0; i < string->size; ++i) {
73 print_char(string->begin[i]);
78 * Returns 1 if a given precedence level has right-to-left
79 * associativity, else 0.
81 * @param precedence the operator precedence
83 static int right_to_left(unsigned precedence)
87 case PREC_CONDITIONAL:
97 * Return the precedence of an expression given by its kind.
99 * @param kind the expression kind
101 static unsigned get_expression_precedence(expression_kind_t kind)
103 static const unsigned prec[] = {
104 [EXPR_REFERENCE] = PREC_PRIMARY,
105 [EXPR_REFERENCE_ENUM_VALUE] = PREC_PRIMARY,
106 [EXPR_LITERAL_INTEGER] = PREC_PRIMARY,
107 [EXPR_LITERAL_INTEGER_OCTAL] = PREC_PRIMARY,
108 [EXPR_LITERAL_INTEGER_HEXADECIMAL] = PREC_PRIMARY,
109 [EXPR_LITERAL_FLOATINGPOINT] = PREC_PRIMARY,
110 [EXPR_LITERAL_FLOATINGPOINT_HEXADECIMAL] = PREC_PRIMARY,
111 [EXPR_LITERAL_CHARACTER] = PREC_PRIMARY,
112 [EXPR_LITERAL_WIDE_CHARACTER] = PREC_PRIMARY,
113 [EXPR_LITERAL_MS_NOOP] = PREC_PRIMARY,
114 [EXPR_STRING_LITERAL] = PREC_PRIMARY,
115 [EXPR_WIDE_STRING_LITERAL] = PREC_PRIMARY,
116 [EXPR_COMPOUND_LITERAL] = PREC_UNARY,
117 [EXPR_CALL] = PREC_POSTFIX,
118 [EXPR_CONDITIONAL] = PREC_CONDITIONAL,
119 [EXPR_SELECT] = PREC_POSTFIX,
120 [EXPR_ARRAY_ACCESS] = PREC_POSTFIX,
121 [EXPR_SIZEOF] = PREC_UNARY,
122 [EXPR_CLASSIFY_TYPE] = PREC_UNARY,
123 [EXPR_ALIGNOF] = PREC_UNARY,
125 [EXPR_FUNCNAME] = PREC_PRIMARY,
126 [EXPR_BUILTIN_CONSTANT_P] = PREC_PRIMARY,
127 [EXPR_BUILTIN_TYPES_COMPATIBLE_P] = PREC_PRIMARY,
128 [EXPR_OFFSETOF] = PREC_PRIMARY,
129 [EXPR_VA_START] = PREC_PRIMARY,
130 [EXPR_VA_ARG] = PREC_PRIMARY,
131 [EXPR_VA_COPY] = PREC_PRIMARY,
132 [EXPR_STATEMENT] = PREC_PRIMARY,
133 [EXPR_LABEL_ADDRESS] = PREC_PRIMARY,
135 [EXPR_UNARY_NEGATE] = PREC_UNARY,
136 [EXPR_UNARY_PLUS] = PREC_UNARY,
137 [EXPR_UNARY_BITWISE_NEGATE] = PREC_UNARY,
138 [EXPR_UNARY_NOT] = PREC_UNARY,
139 [EXPR_UNARY_DEREFERENCE] = PREC_UNARY,
140 [EXPR_UNARY_TAKE_ADDRESS] = PREC_UNARY,
141 [EXPR_UNARY_POSTFIX_INCREMENT] = PREC_POSTFIX,
142 [EXPR_UNARY_POSTFIX_DECREMENT] = PREC_POSTFIX,
143 [EXPR_UNARY_PREFIX_INCREMENT] = PREC_UNARY,
144 [EXPR_UNARY_PREFIX_DECREMENT] = PREC_UNARY,
145 [EXPR_UNARY_CAST] = PREC_UNARY,
146 [EXPR_UNARY_ASSUME] = PREC_PRIMARY,
147 [EXPR_UNARY_DELETE] = PREC_UNARY,
148 [EXPR_UNARY_DELETE_ARRAY] = PREC_UNARY,
149 [EXPR_UNARY_THROW] = PREC_ASSIGNMENT,
151 [EXPR_BINARY_ADD] = PREC_ADDITIVE,
152 [EXPR_BINARY_SUB] = PREC_ADDITIVE,
153 [EXPR_BINARY_MUL] = PREC_MULTIPLICATIVE,
154 [EXPR_BINARY_DIV] = PREC_MULTIPLICATIVE,
155 [EXPR_BINARY_MOD] = PREC_MULTIPLICATIVE,
156 [EXPR_BINARY_EQUAL] = PREC_EQUALITY,
157 [EXPR_BINARY_NOTEQUAL] = PREC_EQUALITY,
158 [EXPR_BINARY_LESS] = PREC_RELATIONAL,
159 [EXPR_BINARY_LESSEQUAL] = PREC_RELATIONAL,
160 [EXPR_BINARY_GREATER] = PREC_RELATIONAL,
161 [EXPR_BINARY_GREATEREQUAL] = PREC_RELATIONAL,
162 [EXPR_BINARY_BITWISE_AND] = PREC_AND,
163 [EXPR_BINARY_BITWISE_OR] = PREC_OR,
164 [EXPR_BINARY_BITWISE_XOR] = PREC_XOR,
165 [EXPR_BINARY_LOGICAL_AND] = PREC_LOGICAL_AND,
166 [EXPR_BINARY_LOGICAL_OR] = PREC_LOGICAL_OR,
167 [EXPR_BINARY_SHIFTLEFT] = PREC_SHIFT,
168 [EXPR_BINARY_SHIFTRIGHT] = PREC_SHIFT,
169 [EXPR_BINARY_ASSIGN] = PREC_ASSIGNMENT,
170 [EXPR_BINARY_MUL_ASSIGN] = PREC_ASSIGNMENT,
171 [EXPR_BINARY_DIV_ASSIGN] = PREC_ASSIGNMENT,
172 [EXPR_BINARY_MOD_ASSIGN] = PREC_ASSIGNMENT,
173 [EXPR_BINARY_ADD_ASSIGN] = PREC_ASSIGNMENT,
174 [EXPR_BINARY_SUB_ASSIGN] = PREC_ASSIGNMENT,
175 [EXPR_BINARY_SHIFTLEFT_ASSIGN] = PREC_ASSIGNMENT,
176 [EXPR_BINARY_SHIFTRIGHT_ASSIGN] = PREC_ASSIGNMENT,
177 [EXPR_BINARY_BITWISE_AND_ASSIGN] = PREC_ASSIGNMENT,
178 [EXPR_BINARY_BITWISE_XOR_ASSIGN] = PREC_ASSIGNMENT,
179 [EXPR_BINARY_BITWISE_OR_ASSIGN] = PREC_ASSIGNMENT,
180 [EXPR_BINARY_COMMA] = PREC_EXPRESSION,
182 [EXPR_BINARY_ISGREATER] = PREC_PRIMARY,
183 [EXPR_BINARY_ISGREATEREQUAL] = PREC_PRIMARY,
184 [EXPR_BINARY_ISLESS] = PREC_PRIMARY,
185 [EXPR_BINARY_ISLESSEQUAL] = PREC_PRIMARY,
186 [EXPR_BINARY_ISLESSGREATER] = PREC_PRIMARY,
187 [EXPR_BINARY_ISUNORDERED] = PREC_PRIMARY
189 assert((size_t)kind < lengthof(prec));
190 unsigned res = prec[kind];
192 assert(res != PREC_BOTTOM);
197 * Print a quoted string constant.
199 * @param string the string constant
200 * @param border the border char
201 * @param skip number of chars to skip at the end
203 static void print_quoted_string(const string_t *const string, char border,
207 const char *end = string->begin + string->size - skip;
208 for (const char *c = string->begin; c != end; ++c) {
214 case '\\': print_string("\\\\"); break;
215 case '\a': print_string("\\a"); break;
216 case '\b': print_string("\\b"); break;
217 case '\f': print_string("\\f"); break;
218 case '\n': print_string("\\n"); break;
219 case '\r': print_string("\\r"); break;
220 case '\t': print_string("\\t"); break;
221 case '\v': print_string("\\v"); break;
222 case '\?': print_string("\\?"); break;
224 if (c_mode & _GNUC) {
225 print_string("\\e"); break;
229 if ((unsigned)tc < 0x80 && !isprint(tc)) {
230 print_format("\\%03o", (unsigned)tc);
240 static void print_string_literal(const string_literal_expression_t *literal)
242 if (literal->base.kind == EXPR_WIDE_STRING_LITERAL) {
245 print_quoted_string(&literal->value, '"', 1);
248 static void print_literal(const literal_expression_t *literal)
250 switch (literal->base.kind) {
251 case EXPR_LITERAL_MS_NOOP:
252 print_string("__noop");
254 case EXPR_LITERAL_INTEGER_HEXADECIMAL:
255 case EXPR_LITERAL_FLOATINGPOINT_HEXADECIMAL:
258 case EXPR_LITERAL_BOOLEAN:
259 case EXPR_LITERAL_INTEGER:
260 case EXPR_LITERAL_INTEGER_OCTAL:
261 case EXPR_LITERAL_FLOATINGPOINT:
262 print_stringrep(&literal->value);
263 if (literal->suffix.size > 0)
264 print_stringrep(&literal->suffix);
266 case EXPR_LITERAL_WIDE_CHARACTER:
269 case EXPR_LITERAL_CHARACTER:
270 print_quoted_string(&literal->value, '\'', 0);
275 print_string("INVALID LITERAL KIND");
279 * Prints a predefined symbol.
281 static void print_funcname(const funcname_expression_t *funcname)
284 switch (funcname->kind) {
285 case FUNCNAME_FUNCTION: s = (c_mode & _C99) ? "__func__" : "__FUNCTION__"; break;
286 case FUNCNAME_PRETTY_FUNCTION: s = "__PRETTY_FUNCTION__"; break;
287 case FUNCNAME_FUNCSIG: s = "__FUNCSIG__"; break;
288 case FUNCNAME_FUNCDNAME: s = "__FUNCDNAME__"; break;
293 static void print_compound_literal(
294 const compound_literal_expression_t *expression)
297 print_type(expression->type);
299 print_initializer(expression->initializer);
302 static void print_assignment_expression(const expression_t *const expr)
304 print_expression_prec(expr, PREC_ASSIGNMENT);
308 * Prints a call expression.
310 * @param call the call expression
312 static void print_call_expression(const call_expression_t *call)
314 print_expression_prec(call->function, PREC_POSTFIX);
316 char const *sep = "";
317 for (call_argument_t const *arg = call->arguments; arg; arg = arg->next) {
320 print_assignment_expression(arg->expression);
326 * Prints a binary expression.
328 * @param binexpr the binary expression
330 static void print_binary_expression(const binary_expression_t *binexpr)
332 unsigned prec = get_expression_precedence(binexpr->base.kind);
333 int r2l = right_to_left(prec);
335 print_expression_prec(binexpr->left, prec + r2l);
337 switch (binexpr->base.kind) {
338 case EXPR_BINARY_COMMA: op = ", "; break;
339 case EXPR_BINARY_ASSIGN: op = " = "; break;
340 case EXPR_BINARY_ADD: op = " + "; break;
341 case EXPR_BINARY_SUB: op = " - "; break;
342 case EXPR_BINARY_MUL: op = " * "; break;
343 case EXPR_BINARY_MOD: op = " % "; break;
344 case EXPR_BINARY_DIV: op = " / "; break;
345 case EXPR_BINARY_BITWISE_OR: op = " | "; break;
346 case EXPR_BINARY_BITWISE_AND: op = " & "; break;
347 case EXPR_BINARY_BITWISE_XOR: op = " ^ "; break;
348 case EXPR_BINARY_LOGICAL_OR: op = " || "; break;
349 case EXPR_BINARY_LOGICAL_AND: op = " && "; break;
350 case EXPR_BINARY_NOTEQUAL: op = " != "; break;
351 case EXPR_BINARY_EQUAL: op = " == "; break;
352 case EXPR_BINARY_LESS: op = " < "; break;
353 case EXPR_BINARY_LESSEQUAL: op = " <= "; break;
354 case EXPR_BINARY_GREATER: op = " > "; break;
355 case EXPR_BINARY_GREATEREQUAL: op = " >= "; break;
356 case EXPR_BINARY_SHIFTLEFT: op = " << "; break;
357 case EXPR_BINARY_SHIFTRIGHT: op = " >> "; break;
359 case EXPR_BINARY_ADD_ASSIGN: op = " += "; break;
360 case EXPR_BINARY_SUB_ASSIGN: op = " -= "; break;
361 case EXPR_BINARY_MUL_ASSIGN: op = " *= "; break;
362 case EXPR_BINARY_MOD_ASSIGN: op = " %= "; break;
363 case EXPR_BINARY_DIV_ASSIGN: op = " /= "; break;
364 case EXPR_BINARY_BITWISE_OR_ASSIGN: op = " |= "; break;
365 case EXPR_BINARY_BITWISE_AND_ASSIGN: op = " &= "; break;
366 case EXPR_BINARY_BITWISE_XOR_ASSIGN: op = " ^= "; break;
367 case EXPR_BINARY_SHIFTLEFT_ASSIGN: op = " <<= "; break;
368 case EXPR_BINARY_SHIFTRIGHT_ASSIGN: op = " >>= "; break;
369 default: panic("invalid binexpression found");
372 print_expression_prec(binexpr->right, prec + 1 - r2l);
376 * Prints an unary expression.
378 * @param unexpr the unary expression
380 static void print_unary_expression(const unary_expression_t *unexpr)
382 unsigned prec = get_expression_precedence(unexpr->base.kind);
383 switch (unexpr->base.kind) {
384 case EXPR_UNARY_NEGATE: print_char ('-' ); break;
385 case EXPR_UNARY_PLUS: print_char ('+' ); break;
386 case EXPR_UNARY_NOT: print_char ('!' ); break;
387 case EXPR_UNARY_BITWISE_NEGATE: print_char ('~' ); break;
388 case EXPR_UNARY_PREFIX_INCREMENT: print_string("++"); break;
389 case EXPR_UNARY_PREFIX_DECREMENT: print_string("--"); break;
390 case EXPR_UNARY_DEREFERENCE: print_char ('*' ); break;
391 case EXPR_UNARY_TAKE_ADDRESS: print_char ('&' ); break;
392 case EXPR_UNARY_DELETE: print_string("delete "); break;
393 case EXPR_UNARY_DELETE_ARRAY: print_string("delete [] "); break;
395 case EXPR_UNARY_POSTFIX_INCREMENT:
396 print_expression_prec(unexpr->value, prec);
399 case EXPR_UNARY_POSTFIX_DECREMENT:
400 print_expression_prec(unexpr->value, prec);
403 case EXPR_UNARY_CAST:
405 print_type(unexpr->base.type);
408 case EXPR_UNARY_ASSUME:
409 print_string("__assume(");
410 print_assignment_expression(unexpr->value);
414 case EXPR_UNARY_THROW:
415 if (unexpr->value == NULL) {
416 print_string("throw");
419 print_string("throw ");
423 panic("invalid unary expression found");
425 print_expression_prec(unexpr->value, prec);
429 * Prints a reference expression.
431 * @param ref the reference expression
433 static void print_reference_expression(const reference_expression_t *ref)
435 print_string(ref->entity->base.symbol->string);
439 * Prints a label address expression.
441 * @param ref the reference expression
443 static void print_label_address_expression(const label_address_expression_t *le)
445 print_format("&&%s", le->label->base.symbol->string);
449 * Prints an array expression.
451 * @param expression the array expression
453 static void print_array_expression(const array_access_expression_t *expression)
455 if (!expression->flipped) {
456 print_expression_prec(expression->array_ref, PREC_POSTFIX);
458 print_expression(expression->index);
461 print_expression_prec(expression->index, PREC_POSTFIX);
463 print_expression(expression->array_ref);
469 * Prints a typeproperty expression (sizeof or __alignof__).
471 * @param expression the type property expression
473 static void print_typeprop_expression(const typeprop_expression_t *expression)
475 if (expression->base.kind == EXPR_SIZEOF) {
476 print_string("sizeof");
478 assert(expression->base.kind == EXPR_ALIGNOF);
479 print_string("__alignof__");
481 if (expression->tp_expression != NULL) {
482 /* PREC_TOP: always print the '()' here, sizeof x is right but unusual */
483 print_expression_prec(expression->tp_expression, PREC_TOP);
486 print_type(expression->type);
492 * Prints a builtin constant expression.
494 * @param expression the builtin constant expression
496 static void print_builtin_constant(const builtin_constant_expression_t *expression)
498 print_string("__builtin_constant_p(");
499 print_assignment_expression(expression->value);
504 * Prints a builtin types compatible expression.
506 * @param expression the builtin types compatible expression
508 static void print_builtin_types_compatible(
509 const builtin_types_compatible_expression_t *expression)
511 print_string("__builtin_types_compatible_p(");
512 print_type(expression->left);
514 print_type(expression->right);
519 * Prints a conditional expression.
521 * @param expression the conditional expression
523 static void print_conditional(const conditional_expression_t *expression)
525 print_expression_prec(expression->condition, PREC_LOGICAL_OR);
526 if (expression->true_expression != NULL) {
528 print_expression_prec(expression->true_expression, PREC_EXPRESSION);
531 print_string(" ?: ");
533 precedence_t prec = c_mode & _CXX ? PREC_ASSIGNMENT : PREC_CONDITIONAL;
534 print_expression_prec(expression->false_expression, prec);
538 * Prints a va_start expression.
540 * @param expression the va_start expression
542 static void print_va_start(const va_start_expression_t *const expression)
544 print_string("__builtin_va_start(");
545 print_assignment_expression(expression->ap);
547 print_string(expression->parameter->base.base.symbol->string);
552 * Prints a va_arg expression.
554 * @param expression the va_arg expression
556 static void print_va_arg(const va_arg_expression_t *expression)
558 print_string("__builtin_va_arg(");
559 print_assignment_expression(expression->ap);
561 print_type(expression->base.type);
566 * Prints a va_copy expression.
568 * @param expression the va_copy expression
570 static void print_va_copy(const va_copy_expression_t *expression)
572 print_string("__builtin_va_copy(");
573 print_assignment_expression(expression->dst);
575 print_assignment_expression(expression->src);
580 * Prints a select expression (. or ->).
582 * @param expression the select expression
584 static void print_select(const select_expression_t *expression)
586 print_expression_prec(expression->compound, PREC_POSTFIX);
587 /* do not print anything for anonymous struct/union selects
588 * FIXME: if the anonymous select was a '->' this will print '.'
590 if (expression->compound_entry->base.symbol == NULL)
593 if (is_type_pointer(skip_typeref(expression->compound->base.type))) {
598 print_string(expression->compound_entry->base.symbol->string);
602 * Prints a type classify expression.
604 * @param expr the type classify expression
606 static void print_classify_type_expression(
607 const classify_type_expression_t *const expr)
609 print_string("__builtin_classify_type(");
610 print_assignment_expression(expr->type_expression);
615 * Prints a designator.
617 * @param designator the designator
619 static void print_designator(const designator_t *designator)
621 for ( ; designator != NULL; designator = designator->next) {
622 if (designator->symbol == NULL) {
624 print_expression(designator->array_index);
628 print_string(designator->symbol->string);
634 * Prints an offsetof expression.
636 * @param expression the offset expression
638 static void print_offsetof_expression(const offsetof_expression_t *expression)
640 print_string("__builtin_offsetof(");
641 print_type(expression->type);
643 print_designator(expression->designator);
648 * Prints a statement expression.
650 * @param expression the statement expression
652 static void print_statement_expression(const statement_expression_t *expression)
655 print_statement(expression->statement);
660 * Prints an expression with parenthesis if needed.
662 * @param expression the expression to print
663 * @param top_prec the precedence of the user of this expression.
665 static void print_expression_prec(const expression_t *expression, unsigned top_prec)
667 if (expression->kind == EXPR_UNARY_CAST
668 && expression->base.implicit && !print_implicit_casts) {
669 expression = expression->unary.value;
673 expression->base.parenthesized ||
674 (print_parenthesis && top_prec != PREC_BOTTOM) ||
675 top_prec > get_expression_precedence(expression->base.kind);
679 switch (expression->kind) {
681 print_string("$error$");
683 case EXPR_WIDE_STRING_LITERAL:
684 case EXPR_STRING_LITERAL:
685 print_string_literal(&expression->string_literal);
688 print_literal(&expression->literal);
691 print_funcname(&expression->funcname);
693 case EXPR_COMPOUND_LITERAL:
694 print_compound_literal(&expression->compound_literal);
697 print_call_expression(&expression->call);
700 print_binary_expression(&expression->binary);
703 case EXPR_REFERENCE_ENUM_VALUE:
704 print_reference_expression(&expression->reference);
706 case EXPR_ARRAY_ACCESS:
707 print_array_expression(&expression->array_access);
709 case EXPR_LABEL_ADDRESS:
710 print_label_address_expression(&expression->label_address);
713 print_unary_expression(&expression->unary);
717 print_typeprop_expression(&expression->typeprop);
719 case EXPR_BUILTIN_CONSTANT_P:
720 print_builtin_constant(&expression->builtin_constant);
722 case EXPR_BUILTIN_TYPES_COMPATIBLE_P:
723 print_builtin_types_compatible(&expression->builtin_types_compatible);
725 case EXPR_CONDITIONAL:
726 print_conditional(&expression->conditional);
729 print_va_start(&expression->va_starte);
732 print_va_arg(&expression->va_arge);
735 print_va_copy(&expression->va_copye);
738 print_select(&expression->select);
740 case EXPR_CLASSIFY_TYPE:
741 print_classify_type_expression(&expression->classify_type);
744 print_offsetof_expression(&expression->offsetofe);
747 print_statement_expression(&expression->statement);
754 static void print_indented_statement(statement_t const *const stmt)
756 switch (stmt->kind) {
757 case STATEMENT_LABEL:
760 case STATEMENT_CASE_LABEL:
761 for (int i = 0; i != case_indent; ++i)
769 print_statement(stmt);
773 * Print an compound statement.
775 * @param block the compound statement
777 static void print_compound_statement(const compound_statement_t *block)
782 for (statement_t const *stmt = block->statements; stmt; stmt = stmt->base.next) {
783 print_indented_statement(stmt);
793 * Print a return statement.
795 * @param statement the return statement
797 static void print_return_statement(const return_statement_t *statement)
799 expression_t const *const val = statement->value;
801 print_string("return ");
802 print_expression(val);
805 print_string("return;");
810 * Print an expression statement.
812 * @param statement the expression statement
814 static void print_expression_statement(const expression_statement_t *statement)
816 print_expression(statement->expression);
821 * Print a goto statement.
823 * @param statement the goto statement
825 static void print_goto_statement(const goto_statement_t *statement)
827 print_string("goto ");
828 if (statement->expression != NULL) {
830 print_expression(statement->expression);
832 print_string(statement->label->base.symbol->string);
838 * Print a label statement.
840 * @param statement the label statement
842 static void print_label_statement(const label_statement_t *statement)
844 print_format("%s:\n", statement->label->base.symbol->string);
845 print_indented_statement(statement->statement);
848 static void print_inner_statement(statement_t const *const stmt)
850 if (stmt->kind == STATEMENT_COMPOUND) {
852 print_compound_statement(&stmt->compound);
856 print_indented_statement(stmt);
861 static void print_after_inner_statement(statement_t const *const stmt)
863 if (stmt->kind == STATEMENT_COMPOUND) {
872 * Print an if statement.
874 * @param statement the if statement
876 static void print_if_statement(const if_statement_t *statement)
878 print_string("if (");
879 print_expression(statement->condition);
881 print_inner_statement(statement->true_statement);
883 statement_t const *const f = statement->false_statement;
885 print_after_inner_statement(statement->true_statement);
886 print_string("else");
887 if (f->kind == STATEMENT_IF) {
889 print_if_statement(&f->ifs);
891 print_inner_statement(f);
897 * Print a switch statement.
899 * @param statement the switch statement
901 static void print_switch_statement(const switch_statement_t *statement)
903 int const old_case_indent = case_indent;
904 case_indent = indent;
906 print_string("switch (");
907 print_expression(statement->expression);
909 print_inner_statement(statement->body);
911 case_indent = old_case_indent;
915 * Print a case label (including the default label).
917 * @param statement the case label statement
919 static void print_case_label(const case_label_statement_t *statement)
921 if (statement->expression == NULL) {
922 print_string("default:\n");
924 print_string("case ");
925 print_expression(statement->expression);
926 if (statement->end_range != NULL) {
927 print_string(" ... ");
928 print_expression(statement->end_range);
932 print_indented_statement(statement->statement);
935 static void print_typedef(const entity_t *entity)
937 print_string("typedef ");
938 print_type_ext(entity->typedefe.type, entity->base.symbol, NULL);
943 * returns true if the entity is a compiler generated one and has no real
944 * correspondenc in the source file
946 static bool is_generated_entity(const entity_t *entity)
948 if (entity->kind == ENTITY_TYPEDEF)
949 return entity->typedefe.builtin;
951 if (is_declaration(entity))
952 return entity->declaration.implicit;
958 * Print a declaration statement.
960 * @param statement the statement
962 static void print_declaration_statement(
963 const declaration_statement_t *statement)
966 entity_t *entity = statement->declarations_begin;
967 if (entity == NULL) {
968 print_string("/* empty declaration statement */");
972 entity_t *const end = statement->declarations_end->base.next;
973 for (; entity != end; entity = entity->base.next) {
974 if (entity->kind == ENTITY_ENUM_VALUE)
976 if (is_generated_entity(entity))
986 print_entity(entity);
991 * Print a while statement.
993 * @param statement the statement
995 static void print_while_statement(const while_statement_t *statement)
997 print_string("while (");
998 print_expression(statement->condition);
1000 print_inner_statement(statement->body);
1004 * Print a do-while statement.
1006 * @param statement the statement
1008 static void print_do_while_statement(const do_while_statement_t *statement)
1011 print_inner_statement(statement->body);
1012 print_after_inner_statement(statement->body);
1013 print_string("while (");
1014 print_expression(statement->condition);
1019 * Print a for statement.
1021 * @param statement the statement
1023 static void print_for_statement(const for_statement_t *statement)
1025 print_string("for (");
1026 if (statement->initialisation != NULL) {
1027 print_expression(statement->initialisation);
1030 entity_t const *entity = statement->scope.entities;
1031 for (; entity != NULL; entity = entity->base.next) {
1032 if (is_generated_entity(entity))
1034 /* FIXME display of multiple declarations is wrong */
1035 print_declaration(entity);
1038 if (statement->condition != NULL) {
1040 print_expression(statement->condition);
1043 if (statement->step != NULL) {
1045 print_expression(statement->step);
1048 print_inner_statement(statement->body);
1052 * Print assembler arguments.
1054 * @param arguments the arguments
1056 static void print_asm_arguments(asm_argument_t *arguments)
1058 asm_argument_t *argument = arguments;
1059 for (; argument != NULL; argument = argument->next) {
1060 if (argument != arguments)
1063 if (argument->symbol) {
1064 print_format("[%s] ", argument->symbol->string);
1066 print_quoted_string(&argument->constraints, '"', 1);
1068 print_expression(argument->expression);
1074 * Print assembler clobbers.
1076 * @param clobbers the clobbers
1078 static void print_asm_clobbers(asm_clobber_t *clobbers)
1080 asm_clobber_t *clobber = clobbers;
1081 for (; clobber != NULL; clobber = clobber->next) {
1082 if (clobber != clobbers)
1085 print_quoted_string(&clobber->clobber, '"', 1);
1090 * Print an assembler statement.
1092 * @param statement the statement
1094 static void print_asm_statement(const asm_statement_t *statement)
1096 print_string("asm ");
1097 if (statement->is_volatile) {
1098 print_string("volatile ");
1101 print_quoted_string(&statement->asm_text, '"', 1);
1102 if (statement->outputs == NULL &&
1103 statement->inputs == NULL &&
1104 statement->clobbers == NULL)
1105 goto end_of_print_asm_statement;
1107 print_string(" : ");
1108 print_asm_arguments(statement->outputs);
1109 if (statement->inputs == NULL && statement->clobbers == NULL)
1110 goto end_of_print_asm_statement;
1112 print_string(" : ");
1113 print_asm_arguments(statement->inputs);
1114 if (statement->clobbers == NULL)
1115 goto end_of_print_asm_statement;
1117 print_string(" : ");
1118 print_asm_clobbers(statement->clobbers);
1120 end_of_print_asm_statement:
1125 * Print a microsoft __try statement.
1127 * @param statement the statement
1129 static void print_ms_try_statement(const ms_try_statement_t *statement)
1131 print_string("__try");
1132 print_inner_statement(statement->try_statement);
1133 print_after_inner_statement(statement->try_statement);
1134 if (statement->except_expression != NULL) {
1135 print_string("__except(");
1136 print_expression(statement->except_expression);
1139 print_string("__finally");
1141 print_inner_statement(statement->final_statement);
1145 * Print a microsoft __leave statement.
1147 * @param statement the statement
1149 static void print_leave_statement(const leave_statement_t *statement)
1152 print_string("__leave;");
1156 * Print a statement.
1158 * @param statement the statement
1160 void print_statement(const statement_t *statement)
1162 switch (statement->kind) {
1163 case STATEMENT_EMPTY:
1166 case STATEMENT_COMPOUND:
1167 print_compound_statement(&statement->compound);
1169 case STATEMENT_RETURN:
1170 print_return_statement(&statement->returns);
1172 case STATEMENT_EXPRESSION:
1173 print_expression_statement(&statement->expression);
1175 case STATEMENT_LABEL:
1176 print_label_statement(&statement->label);
1178 case STATEMENT_GOTO:
1179 print_goto_statement(&statement->gotos);
1181 case STATEMENT_CONTINUE:
1182 print_string("continue;");
1184 case STATEMENT_BREAK:
1185 print_string("break;");
1188 print_if_statement(&statement->ifs);
1190 case STATEMENT_SWITCH:
1191 print_switch_statement(&statement->switchs);
1193 case STATEMENT_CASE_LABEL:
1194 print_case_label(&statement->case_label);
1196 case STATEMENT_DECLARATION:
1197 print_declaration_statement(&statement->declaration);
1199 case STATEMENT_WHILE:
1200 print_while_statement(&statement->whiles);
1202 case STATEMENT_DO_WHILE:
1203 print_do_while_statement(&statement->do_while);
1206 print_for_statement(&statement->fors);
1209 print_asm_statement(&statement->asms);
1211 case STATEMENT_MS_TRY:
1212 print_ms_try_statement(&statement->ms_try);
1214 case STATEMENT_LEAVE:
1215 print_leave_statement(&statement->leave);
1217 case STATEMENT_ERROR:
1218 print_string("$error statement$");
1224 * Print a storage class.
1226 * @param storage_class the storage class
1228 static void print_storage_class(storage_class_tag_t storage_class)
1230 switch (storage_class) {
1231 case STORAGE_CLASS_NONE: return;
1232 case STORAGE_CLASS_TYPEDEF: print_string("typedef "); return;
1233 case STORAGE_CLASS_EXTERN: print_string("extern "); return;
1234 case STORAGE_CLASS_STATIC: print_string("static "); return;
1235 case STORAGE_CLASS_AUTO: print_string("auto "); return;
1236 case STORAGE_CLASS_REGISTER: print_string("register "); return;
1238 panic("invalid storage class");
1242 * Print an initializer.
1244 * @param initializer the initializer
1246 void print_initializer(const initializer_t *initializer)
1248 if (initializer == NULL) {
1253 switch (initializer->kind) {
1254 case INITIALIZER_VALUE: {
1255 const initializer_value_t *value = &initializer->value;
1256 print_assignment_expression(value->value);
1259 case INITIALIZER_LIST: {
1260 assert(initializer->kind == INITIALIZER_LIST);
1262 const initializer_list_t *list = &initializer->list;
1264 for (size_t i = 0 ; i < list->len; ++i) {
1265 const initializer_t *sub_init = list->initializers[i];
1266 print_initializer(list->initializers[i]);
1267 if (i < list->len-1) {
1268 if (sub_init == NULL || sub_init->kind != INITIALIZER_DESIGNATOR)
1275 case INITIALIZER_STRING:
1276 print_quoted_string(&initializer->string.string, '"', 1);
1278 case INITIALIZER_WIDE_STRING:
1279 print_quoted_string(&initializer->string.string, '"', 1);
1281 case INITIALIZER_DESIGNATOR:
1282 print_designator(initializer->designator.designator);
1283 print_string(" = ");
1287 panic("invalid initializer kind found");
1292 * Print microsoft extended declaration modifiers.
1294 static void print_ms_modifiers(const declaration_t *declaration)
1296 if ((c_mode & _MS) == 0)
1299 decl_modifiers_t modifiers = declaration->modifiers;
1301 bool ds_shown = false;
1302 const char *next = "(";
1304 if (declaration->base.kind == ENTITY_VARIABLE) {
1305 variable_t *variable = (variable_t*)declaration;
1306 if (variable->alignment != 0
1307 || variable->get_property_sym != NULL
1308 || variable->put_property_sym != NULL) {
1310 print_string("__declspec");
1314 if (variable->alignment != 0) {
1315 print_string(next); next = ", "; print_format("align(%u)", variable->alignment);
1317 if (variable->get_property_sym != NULL
1318 || variable->put_property_sym != NULL) {
1320 print_string(next); next = ", "; print_string("property(");
1321 if (variable->get_property_sym != NULL) {
1322 print_format("get=%s", variable->get_property_sym->string);
1325 if (variable->put_property_sym != NULL)
1326 print_format("%sput=%s", comma, variable->put_property_sym->string);
1332 /* DM_FORCEINLINE handled outside. */
1333 if ((modifiers & ~DM_FORCEINLINE) != 0) {
1335 print_string("__declspec");
1338 if (modifiers & DM_DLLIMPORT) {
1339 print_string(next); next = ", "; print_string("dllimport");
1341 if (modifiers & DM_DLLEXPORT) {
1342 print_string(next); next = ", "; print_string("dllexport");
1344 if (modifiers & DM_THREAD) {
1345 print_string(next); next = ", "; print_string("thread");
1347 if (modifiers & DM_NAKED) {
1348 print_string(next); next = ", "; print_string("naked");
1350 if (modifiers & DM_THREAD) {
1351 print_string(next); next = ", "; print_string("thread");
1353 if (modifiers & DM_SELECTANY) {
1354 print_string(next); next = ", "; print_string("selectany");
1356 if (modifiers & DM_NOTHROW) {
1357 print_string(next); next = ", "; print_string("nothrow");
1359 if (modifiers & DM_NORETURN) {
1360 print_string(next); next = ", "; print_string("noreturn");
1362 if (modifiers & DM_NOINLINE) {
1363 print_string(next); next = ", "; print_string("noinline");
1365 if (modifiers & DM_DEPRECATED) {
1366 print_string(next); next = ", "; print_string("deprecated");
1367 if (declaration->deprecated_string != NULL)
1368 print_format("(\"%s\")",
1369 declaration->deprecated_string);
1371 if (modifiers & DM_RESTRICT) {
1372 print_string(next); next = ", "; print_string("restrict");
1374 if (modifiers & DM_NOALIAS) {
1375 print_string(next); next = ", "; print_string("noalias");
1384 static void print_scope(const scope_t *scope)
1386 const entity_t *entity = scope->entities;
1387 for ( ; entity != NULL; entity = entity->base.next) {
1389 print_entity(entity);
1394 static void print_namespace(const namespace_t *namespace)
1396 print_string("namespace ");
1397 if (namespace->base.symbol != NULL) {
1398 print_string(namespace->base.symbol->string);
1402 print_string("{\n");
1405 print_scope(&namespace->members);
1409 print_string("}\n");
1413 * Print a variable or function declaration
1415 void print_declaration(const entity_t *entity)
1417 assert(is_declaration(entity));
1418 const declaration_t *declaration = &entity->declaration;
1420 print_storage_class((storage_class_tag_t)declaration->declared_storage_class);
1421 if (entity->kind == ENTITY_FUNCTION) {
1422 function_t *function = (function_t*)declaration;
1423 if (function->is_inline) {
1424 if (declaration->modifiers & DM_FORCEINLINE) {
1425 print_string("__forceinline ");
1426 } else if (declaration->modifiers & DM_MICROSOFT_INLINE) {
1427 print_string("__inline ");
1429 print_string("inline ");
1433 //print_ms_modifiers(declaration);
1434 switch (entity->kind) {
1435 case ENTITY_FUNCTION:
1436 print_type_ext(entity->declaration.type, entity->base.symbol,
1437 &entity->function.parameters);
1439 if (entity->function.statement != NULL) {
1441 print_indented_statement(entity->function.statement);
1447 case ENTITY_VARIABLE:
1448 if (entity->variable.thread_local)
1449 print_string("__thread ");
1450 print_type_ext(declaration->type, declaration->base.symbol, NULL);
1451 if (entity->variable.initializer != NULL) {
1452 print_string(" = ");
1453 print_initializer(entity->variable.initializer);
1457 case ENTITY_COMPOUND_MEMBER:
1458 print_type_ext(declaration->type, declaration->base.symbol, NULL);
1459 if (entity->compound_member.bitfield) {
1460 print_format(" : %u", entity->compound_member.bit_size);
1465 print_type_ext(declaration->type, declaration->base.symbol, NULL);
1472 * Prints an expression.
1474 * @param expression the expression
1476 void print_expression(const expression_t *expression)
1478 print_expression_prec(expression, PREC_BOTTOM);
1482 * Print a declaration.
1484 * @param declaration the declaration
1486 void print_entity(const entity_t *entity)
1488 if (entity->base.namespc != NAMESPACE_NORMAL && entity->base.symbol == NULL)
1491 switch ((entity_kind_tag_t)entity->kind) {
1492 case ENTITY_VARIABLE:
1493 case ENTITY_PARAMETER:
1494 case ENTITY_COMPOUND_MEMBER:
1495 case ENTITY_FUNCTION:
1496 print_declaration(entity);
1498 case ENTITY_TYPEDEF:
1499 print_typedef(entity);
1503 print_string("class ");
1504 print_string(entity->base.symbol->string);
1505 print_string("; /* TODO */\n");
1508 print_string("struct ");
1509 goto print_compound;
1511 print_string("union ");
1513 print_string(entity->base.symbol->string);
1514 if (entity->compound.complete) {
1516 print_compound_definition(&entity->compound);
1521 print_string("enum ");
1522 print_string(entity->base.symbol->string);
1524 print_enum_definition(&entity->enume);
1527 case ENTITY_NAMESPACE:
1528 print_namespace(&entity->namespacee);
1530 case ENTITY_LOCAL_LABEL:
1531 print_string("__label__ ");
1532 print_string(entity->base.symbol->string);
1536 case ENTITY_ENUM_VALUE:
1537 panic("print_entity used on unexpected entity type");
1539 panic("Invalid entity type encountered");
1543 * Print the AST of a translation unit.
1545 * @param unit the translation unit
1547 void print_ast(const translation_unit_t *unit)
1549 entity_t *entity = unit->scope.entities;
1550 for ( ; entity != NULL; entity = entity->base.next) {
1551 if (entity->kind == ENTITY_ENUM_VALUE)
1553 if (entity->base.namespc != NAMESPACE_NORMAL
1554 && entity->base.symbol == NULL)
1556 if (is_generated_entity(entity))
1560 print_entity(entity);
1565 expression_classification_t is_constant_initializer(const initializer_t *initializer)
1567 switch (initializer->kind) {
1568 case INITIALIZER_STRING:
1569 case INITIALIZER_WIDE_STRING:
1570 case INITIALIZER_DESIGNATOR:
1571 return EXPR_CLASS_CONSTANT;
1573 case INITIALIZER_VALUE:
1574 return is_linker_constant(initializer->value.value);
1576 case INITIALIZER_LIST: {
1577 expression_classification_t all = EXPR_CLASS_CONSTANT;
1578 for (size_t i = 0; i < initializer->list.len; ++i) {
1579 initializer_t *sub_initializer = initializer->list.initializers[i];
1580 expression_classification_t const cur = is_constant_initializer(sub_initializer);
1588 panic("invalid initializer kind found");
1592 * Checks if an expression references an object with a constant/known location
1593 * to the linker. Example:
1594 * - "x", "*&x" with x being a global variable. The value of x need not be
1595 * constant but the address of x is.
1596 * - "a.b.c" when a has a constant/known location to the linker
1598 static expression_classification_t is_object_with_linker_constant_address(
1599 const expression_t *expression)
1601 switch (expression->kind) {
1602 case EXPR_UNARY_DEREFERENCE:
1603 return is_linker_constant(expression->unary.value);
1606 type_t *base_type = skip_typeref(expression->select.compound->base.type);
1607 if (is_type_pointer(base_type)) {
1609 return is_linker_constant(expression->select.compound);
1611 return is_object_with_linker_constant_address(expression->select.compound);
1615 case EXPR_ARRAY_ACCESS: {
1616 expression_classification_t const ref = is_linker_constant(expression->array_access.array_ref);
1617 expression_classification_t const idx = is_constant_expression(expression->array_access.index);
1618 return ref < idx ? ref : idx;
1621 case EXPR_REFERENCE: {
1622 entity_t *entity = expression->reference.entity;
1623 if (!is_declaration(entity))
1624 return EXPR_CLASS_VARIABLE;
1626 switch ((storage_class_tag_t)entity->declaration.storage_class) {
1627 case STORAGE_CLASS_NONE:
1628 case STORAGE_CLASS_EXTERN:
1629 case STORAGE_CLASS_STATIC:
1631 entity->kind != ENTITY_VARIABLE ||
1632 !entity->variable.thread_local ? EXPR_CLASS_CONSTANT :
1633 EXPR_CLASS_VARIABLE;
1635 case STORAGE_CLASS_REGISTER:
1636 case STORAGE_CLASS_TYPEDEF:
1637 case STORAGE_CLASS_AUTO:
1640 return EXPR_CLASS_VARIABLE;
1644 return EXPR_CLASS_ERROR;
1647 return EXPR_CLASS_VARIABLE;
1651 expression_classification_t is_linker_constant(const expression_t *expression)
1653 switch (expression->kind) {
1654 case EXPR_STRING_LITERAL:
1655 case EXPR_WIDE_STRING_LITERAL:
1657 case EXPR_LABEL_ADDRESS:
1658 return EXPR_CLASS_CONSTANT;
1660 case EXPR_COMPOUND_LITERAL:
1661 return is_constant_initializer(expression->compound_literal.initializer);
1663 case EXPR_UNARY_TAKE_ADDRESS:
1664 return is_object_with_linker_constant_address(expression->unary.value);
1666 case EXPR_UNARY_DEREFERENCE: {
1668 = revert_automatic_type_conversion(expression->unary.value);
1669 /* dereferencing a function is a NOP */
1670 if (is_type_function(real_type)) {
1671 return is_linker_constant(expression->unary.value);
1676 case EXPR_UNARY_CAST: {
1677 type_t *dest = skip_typeref(expression->base.type);
1678 if (!is_type_pointer(dest) && (
1679 dest->kind != TYPE_ATOMIC ||
1680 !(get_atomic_type_flags(dest->atomic.akind) & ATOMIC_TYPE_FLAG_INTEGER) ||
1681 get_atomic_type_size(dest->atomic.akind) < get_type_size(type_void_ptr)
1683 return is_constant_expression(expression);
1685 return is_linker_constant(expression->unary.value);
1688 case EXPR_BINARY_ADD:
1689 case EXPR_BINARY_SUB: {
1690 expression_t *const left = expression->binary.left;
1691 expression_t *const right = expression->binary.right;
1692 type_t *const ltype = skip_typeref(left->base.type);
1693 type_t *const rtype = skip_typeref(right->base.type);
1695 if (is_type_pointer(ltype)) {
1696 expression_classification_t const l = is_linker_constant(left);
1697 expression_classification_t const r = is_constant_expression(right);
1698 return l < r ? l : r;
1699 } else if (is_type_pointer(rtype)) {
1700 expression_classification_t const l = is_constant_expression(left);
1701 expression_classification_t const r = is_linker_constant(right);
1702 return l < r ? l : r;
1703 } else if (!is_type_valid(ltype) || !is_type_valid(rtype)) {
1704 return EXPR_CLASS_ERROR;
1706 return is_constant_expression(expression);
1710 case EXPR_REFERENCE: {
1711 entity_t *entity = expression->reference.entity;
1712 if (!is_declaration(entity))
1713 return EXPR_CLASS_VARIABLE;
1715 type_t *type = skip_typeref(entity->declaration.type);
1716 if (is_type_function(type))
1717 return EXPR_CLASS_CONSTANT;
1718 if (is_type_array(type)) {
1719 return is_object_with_linker_constant_address(expression);
1721 /* Prevent stray errors */
1722 if (!is_type_valid(type))
1723 return EXPR_CLASS_ERROR;
1724 return EXPR_CLASS_VARIABLE;
1727 case EXPR_ARRAY_ACCESS: {
1728 type_t *const type =
1729 skip_typeref(revert_automatic_type_conversion(expression));
1730 if (!is_type_array(type))
1731 return EXPR_CLASS_VARIABLE;
1732 return is_linker_constant(expression->array_access.array_ref);
1735 case EXPR_CONDITIONAL: {
1736 expression_t *const c = expression->conditional.condition;
1737 expression_classification_t const cclass = is_constant_expression(c);
1738 if (cclass != EXPR_CLASS_CONSTANT)
1741 if (fold_constant_to_bool(c)) {
1742 expression_t const *const t = expression->conditional.true_expression;
1743 return is_linker_constant(t != NULL ? t : c);
1745 return is_linker_constant(expression->conditional.false_expression);
1750 entity_t *entity = expression->select.compound_entry;
1751 if (!is_declaration(entity))
1752 return EXPR_CLASS_VARIABLE;
1753 type_t *type = skip_typeref(entity->declaration.type);
1754 if (is_type_array(type)) {
1755 /* arrays automatically convert to their address */
1756 expression_t *compound = expression->select.compound;
1757 type_t *base_type = skip_typeref(compound->base.type);
1758 if (is_type_pointer(base_type)) {
1760 return is_linker_constant(compound);
1762 return is_object_with_linker_constant_address(compound);
1765 return EXPR_CLASS_VARIABLE;
1769 return is_constant_expression(expression);
1774 * Check if the given expression is a call to a builtin function
1775 * returning a constant result.
1777 static expression_classification_t is_builtin_const_call(const expression_t *expression)
1779 expression_t *function = expression->call.function;
1780 if (function->kind != EXPR_REFERENCE)
1781 return EXPR_CLASS_VARIABLE;
1782 reference_expression_t *ref = &function->reference;
1783 if (ref->entity->kind != ENTITY_FUNCTION)
1784 return EXPR_CLASS_VARIABLE;
1786 switch (ref->entity->function.btk) {
1789 return EXPR_CLASS_CONSTANT;
1791 return EXPR_CLASS_VARIABLE;
1796 static expression_classification_t is_constant_pointer(const expression_t *expression)
1798 expression_classification_t const expr_class = is_constant_expression(expression);
1799 if (expr_class != EXPR_CLASS_VARIABLE)
1802 switch (expression->kind) {
1803 case EXPR_UNARY_CAST:
1804 return is_constant_pointer(expression->unary.value);
1806 return EXPR_CLASS_VARIABLE;
1810 static expression_classification_t is_object_with_constant_address(const expression_t *expression)
1812 switch (expression->kind) {
1814 expression_t *compound = expression->select.compound;
1815 type_t *compound_type = compound->base.type;
1816 compound_type = skip_typeref(compound_type);
1817 if (is_type_pointer(compound_type)) {
1818 return is_constant_pointer(compound);
1820 return is_object_with_constant_address(compound);
1824 case EXPR_ARRAY_ACCESS: {
1825 array_access_expression_t const* const array_access =
1826 &expression->array_access;
1827 expression_classification_t const idx_class = is_constant_expression(array_access->index);
1828 if (idx_class != EXPR_CLASS_CONSTANT)
1830 expression_classification_t const ref_addr = is_object_with_constant_address(array_access->array_ref);
1831 expression_classification_t const ref_ptr = is_constant_pointer(array_access->array_ref);
1832 return ref_addr > ref_ptr ? ref_addr : ref_ptr;
1835 case EXPR_UNARY_DEREFERENCE:
1836 return is_constant_pointer(expression->unary.value);
1839 return EXPR_CLASS_ERROR;
1842 return EXPR_CLASS_VARIABLE;
1846 expression_classification_t is_constant_expression(const expression_t *expression)
1848 switch (expression->kind) {
1850 case EXPR_CLASSIFY_TYPE:
1853 case EXPR_BUILTIN_CONSTANT_P:
1854 case EXPR_BUILTIN_TYPES_COMPATIBLE_P:
1855 case EXPR_REFERENCE_ENUM_VALUE:
1856 return EXPR_CLASS_CONSTANT;
1859 type_t *const type = skip_typeref(expression->typeprop.type);
1861 !is_type_array(type) || !type->array.is_vla ? EXPR_CLASS_CONSTANT :
1862 EXPR_CLASS_VARIABLE;
1865 case EXPR_STRING_LITERAL:
1866 case EXPR_WIDE_STRING_LITERAL:
1868 case EXPR_LABEL_ADDRESS:
1873 case EXPR_STATEMENT:
1874 case EXPR_UNARY_POSTFIX_INCREMENT:
1875 case EXPR_UNARY_POSTFIX_DECREMENT:
1876 case EXPR_UNARY_PREFIX_INCREMENT:
1877 case EXPR_UNARY_PREFIX_DECREMENT:
1878 case EXPR_UNARY_ASSUME: /* has VOID type */
1879 case EXPR_UNARY_DEREFERENCE:
1880 case EXPR_UNARY_DELETE:
1881 case EXPR_UNARY_DELETE_ARRAY:
1882 case EXPR_UNARY_THROW:
1883 case EXPR_BINARY_ASSIGN:
1884 case EXPR_BINARY_MUL_ASSIGN:
1885 case EXPR_BINARY_DIV_ASSIGN:
1886 case EXPR_BINARY_MOD_ASSIGN:
1887 case EXPR_BINARY_ADD_ASSIGN:
1888 case EXPR_BINARY_SUB_ASSIGN:
1889 case EXPR_BINARY_SHIFTLEFT_ASSIGN:
1890 case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
1891 case EXPR_BINARY_BITWISE_AND_ASSIGN:
1892 case EXPR_BINARY_BITWISE_XOR_ASSIGN:
1893 case EXPR_BINARY_BITWISE_OR_ASSIGN:
1894 case EXPR_BINARY_COMMA:
1895 case EXPR_ARRAY_ACCESS:
1896 return EXPR_CLASS_VARIABLE;
1898 case EXPR_REFERENCE: {
1899 type_t *const type = skip_typeref(expression->base.type);
1900 return is_type_valid(type) ? EXPR_CLASS_VARIABLE : EXPR_CLASS_ERROR;
1903 case EXPR_UNARY_TAKE_ADDRESS:
1904 return is_object_with_constant_address(expression->unary.value);
1907 return is_builtin_const_call(expression);
1909 case EXPR_UNARY_NEGATE:
1910 case EXPR_UNARY_PLUS:
1911 case EXPR_UNARY_BITWISE_NEGATE:
1912 case EXPR_UNARY_NOT:
1913 return is_constant_expression(expression->unary.value);
1915 case EXPR_UNARY_CAST: {
1916 type_t *const type = skip_typeref(expression->base.type);
1917 if (is_type_scalar(type))
1918 return is_constant_expression(expression->unary.value);
1919 if (!is_type_valid(type))
1920 return EXPR_CLASS_ERROR;
1921 return EXPR_CLASS_VARIABLE;
1924 case EXPR_BINARY_ADD:
1925 case EXPR_BINARY_SUB:
1926 case EXPR_BINARY_MUL:
1927 case EXPR_BINARY_DIV:
1928 case EXPR_BINARY_MOD:
1929 case EXPR_BINARY_EQUAL:
1930 case EXPR_BINARY_NOTEQUAL:
1931 case EXPR_BINARY_LESS:
1932 case EXPR_BINARY_LESSEQUAL:
1933 case EXPR_BINARY_GREATER:
1934 case EXPR_BINARY_GREATEREQUAL:
1935 case EXPR_BINARY_BITWISE_AND:
1936 case EXPR_BINARY_BITWISE_OR:
1937 case EXPR_BINARY_BITWISE_XOR:
1938 case EXPR_BINARY_SHIFTLEFT:
1939 case EXPR_BINARY_SHIFTRIGHT:
1940 case EXPR_BINARY_ISGREATER:
1941 case EXPR_BINARY_ISGREATEREQUAL:
1942 case EXPR_BINARY_ISLESS:
1943 case EXPR_BINARY_ISLESSEQUAL:
1944 case EXPR_BINARY_ISLESSGREATER:
1945 case EXPR_BINARY_ISUNORDERED: {
1946 expression_classification_t const l = is_constant_expression(expression->binary.left);
1947 expression_classification_t const r = is_constant_expression(expression->binary.right);
1948 return l < r ? l : r;
1951 case EXPR_BINARY_LOGICAL_AND: {
1952 expression_t const *const left = expression->binary.left;
1953 expression_classification_t const lclass = is_constant_expression(left);
1954 if (lclass != EXPR_CLASS_CONSTANT)
1956 if (!fold_constant_to_bool(left))
1957 return EXPR_CLASS_CONSTANT;
1958 return is_constant_expression(expression->binary.right);
1961 case EXPR_BINARY_LOGICAL_OR: {
1962 expression_t const *const left = expression->binary.left;
1963 expression_classification_t const lclass = is_constant_expression(left);
1964 if (lclass != EXPR_CLASS_CONSTANT)
1966 if (fold_constant_to_bool(left))
1967 return EXPR_CLASS_CONSTANT;
1968 return is_constant_expression(expression->binary.right);
1971 case EXPR_COMPOUND_LITERAL:
1972 return is_constant_initializer(expression->compound_literal.initializer);
1974 case EXPR_CONDITIONAL: {
1975 expression_t *const condition = expression->conditional.condition;
1976 expression_classification_t const cclass = is_constant_expression(condition);
1977 if (cclass != EXPR_CLASS_CONSTANT)
1980 if (fold_constant_to_bool(condition)) {
1981 expression_t const *const t = expression->conditional.true_expression;
1982 return t == NULL ? EXPR_CLASS_CONSTANT : is_constant_expression(t);
1984 return is_constant_expression(expression->conditional.false_expression);
1989 return EXPR_CLASS_ERROR;
1991 panic("invalid expression found (is constant expression)");
1996 obstack_init(&ast_obstack);
2001 obstack_free(&ast_obstack, NULL);