} \
next_token();
+#define expect_block(expected) \
+ if(UNLIKELY(token.type != (expected))) { \
+ parse_error_expected(NULL, (expected), 0); \
+ eat_block(); \
+ return NULL; \
+ } \
+ next_token();
+
#define expect_void(expected) \
if(UNLIKELY(token.type != (expected))) { \
parse_error_expected(NULL, (expected), 0); \
;
}
+#if 0
static designator_t *parse_designation(void)
{
if(token.type != '[' && token.type != '.')
last = designator;
}
}
+#endif
-static initializer_t *parse_initializer_list(type_t *type);
-
-static initializer_t *parse_initializer(type_t *type)
+static initializer_t *initializer_from_expression(type_t *type,
+ expression_t *expression)
{
- designator_t *designator = parse_designation();
+ initializer_value_t *result = allocate_ast_zero(sizeof(result[0]));
- initializer_t *result;
- if(token.type == '{') {
- result = parse_initializer_list(type);
- } else {
- result = allocate_ast_zero(sizeof(result[0]));
- result->type = INITIALIZER_VALUE;
- result->v.value = parse_assignment_expression();
+ /* TODO check that expression is a constant expression */
- if(type != NULL) {
- semantic_assign(type, &result->v.value, "initializer");
+ /* § 6.7.8.14/15 char array may be initialized by string literals */
+ if(type->type == TYPE_ARRAY && expression->type == EXPR_STRING_LITERAL) {
+ array_type_t *array_type = (array_type_t*) type;
+ type_t *element_type = array_type->element_type;
+
+ if(element_type->type == TYPE_ATOMIC) {
+ atomic_type_t *atomic_type = (atomic_type_t*) element_type;
+ atomic_type_type_t atype = atomic_type->atype;
+
+ /* TODO handle wide strings */
+ if(atype == ATOMIC_TYPE_CHAR
+ || atype == ATOMIC_TYPE_SCHAR
+ || atype == ATOMIC_TYPE_UCHAR) {
+ /* it's fine TODO: check for length of string array... */
+ goto initializer_from_expression_finished;
+ }
}
}
- result->designator = designator;
- return result;
+ semantic_assign(type, &expression, "initializer");
+
+initializer_from_expression_finished:
+ result->initializer.type = INITIALIZER_VALUE;
+ result->value = expression;
+
+ return (initializer_t*) result;
}
-static initializer_t *parse_initializer_list(type_t *type)
+static initializer_t *parse_sub_initializer(type_t *type,
+ expression_t *expression,
+ type_t *expression_type);
+
+static initializer_t *parse_sub_initializer_elem(type_t *type)
{
- eat('{');
+ if(token.type == '{') {
+ return parse_sub_initializer(type, NULL, NULL);
+ }
+
+ expression_t *expression = parse_assignment_expression();
+ type_t *expression_type = skip_typeref(expression->datatype);
- /* TODO: semantic */
- (void) type;
+ return parse_sub_initializer(type, expression, expression_type);
+}
- initializer_t *result = allocate_ast_zero(sizeof(result[0]));
- result->type = INITIALIZER_LIST;
+static bool had_initializer_brace_warning;
- initializer_t *last = NULL;
- while(1) {
- initializer_t *initializer = parse_initializer(NULL);
- if(last != NULL) {
- last->next = initializer;
+static initializer_t *parse_sub_initializer(type_t *type,
+ expression_t *expression,
+ type_t *expression_type)
+{
+ if(is_type_scalar(type)) {
+ /* there might be extra {} hierarchies */
+ if(token.type == '{') {
+ next_token();
+ if(!had_initializer_brace_warning) {
+ parse_warning("braces around scalar initializer");
+ had_initializer_brace_warning = true;
+ }
+ initializer_t *result = parse_sub_initializer(type, NULL, NULL);
+ if(token.type == ',') {
+ next_token();
+ /* TODO: warn about excessive elements */
+ }
+ expect_block('}');
+ return result;
+ }
+
+ if(expression == NULL) {
+ expression = parse_assignment_expression();
+ }
+ return initializer_from_expression(type, expression);
+ }
+
+ /* TODO: ignore qualifiers, comparing pointers is probably
+ * not correct */
+ if(expression != NULL && expression_type == type) {
+ initializer_t *result = allocate_ast_zero(sizeof(result[0]));
+ result->type = INITIALIZER_VALUE;
+
+ if(type != NULL) {
+ semantic_assign(type, &expression, "initializer");
+ }
+ //result->v.value = expression;
+
+ return result;
+ }
+
+ bool read_paren = false;
+ if(token.type == '{') {
+ next_token();
+ read_paren = true;
+ }
+
+ /* descend into subtype */
+ initializer_t *result = NULL;
+ if(type->type == TYPE_ARRAY) {
+ array_type_t *array_type = (array_type_t*) type;
+ type_t *element_type = array_type->element_type;
+ element_type = skip_typeref(element_type);
+
+ result
+ = parse_sub_initializer(element_type, expression, expression_type);
+ } else {
+ assert(type->type == TYPE_COMPOUND_STRUCT
+ || type->type == TYPE_COMPOUND_UNION);
+ compound_type_t *compound_type = (compound_type_t*) type;
+ context_t *context = & compound_type->declaration->context;
+
+ declaration_t *first = context->declarations;
+ if(first == NULL)
+ return NULL;
+ type_t *first_type = first->type;
+ first_type = skip_typeref(first_type);
+
+ initializer_t *sub;
+ had_initializer_brace_warning = false;
+ if(expression == NULL) {
+ sub = parse_sub_initializer_elem(first_type);
} else {
- result->v.list = initializer;
+ sub = parse_sub_initializer(first_type, expression,expression_type);
}
- last = initializer;
- if(token.type == '}')
- break;
+ /* didn't match the subtypes -> try our parent type */
+ if(sub == NULL) {
+ assert(!read_paren);
+ return NULL;
+ }
- if(token.type != ',') {
- parse_error_expected("while parsing initializer list", ',', '}', 0);
- eat_block();
- return result;
+ initializer_t **elems = NEW_ARR_F(initializer_t*, 0);
+ ARR_APP1(initializer_t*, elems, sub);
+
+ declaration_t *iter = first->next;
+ for( ; iter != NULL; iter = iter->next) {
+ if(iter->symbol == NULL)
+ continue;
+ if(iter->namespc != NAMESPACE_NORMAL)
+ continue;
+
+ if(token.type == '}')
+ break;
+ expect_block(',');
+
+ type_t *iter_type = iter->type;
+ iter_type = skip_typeref(iter_type);
+
+ /* read next token */
+ initializer_t *sub = parse_sub_initializer(iter_type, NULL, NULL);
+ if(sub == NULL) {
+ /* TODO error, do nicer cleanup*/
+ parse_error("member initializer didn't match");
+ DEL_ARR_F(elems);
+ return NULL;
+ }
+ ARR_APP1(initializer_t*, elems, sub);
}
- eat(',');
- if(token.type == '}')
- break;
+ int len = ARR_LEN(elems);
+ size_t elems_size = sizeof(initializer_t*) * len;
+
+ initializer_list_t *init
+ = allocate_ast_zero(sizeof(init[0]) + elems_size);
+
+ init->initializer.type = INITIALIZER_LIST;
+ init->len = len;
+ memcpy(init->initializers, elems, elems_size);
+ DEL_ARR_F(elems);
+
+ result = (initializer_t*) init;
}
- expect('}');
+ if(read_paren) {
+ if(token.type == ',')
+ next_token();
+ expect('}');
+ }
+ return result;
+}
+
+static initializer_t *parse_initializer(type_t *type)
+{
+ initializer_t *result;
+
+ type = skip_typeref(type);
+
+ if(token.type != '{') {
+ expression_t *expression = parse_assignment_expression();
+ return initializer_from_expression(type, expression);
+ }
+
+ if(is_type_scalar(type)) {
+ /* § 6.7.8.11 */
+ eat('{');
+
+ expression_t *expression = parse_assignment_expression();
+ result = initializer_from_expression(type, expression);
+
+ if(token.type == ',')
+ next_token();
+
+ expect('}');
+ return result;
+ } else {
+ result = parse_sub_initializer(type, NULL, NULL);
+ }
return result;
}
+
+
static declaration_t *parse_compound_type_specifier(bool is_struct)
{
if(is_struct) {
if(may_be_abstract)
break;
parse_error_expected("while parsing declarator", T_IDENTIFIER, '(', 0);
+ /* avoid a loop in the outermost scope, because eat_statement doesn't
+ * eat '}' */
+ if(token.type == '}' && current_function == NULL) {
+ next_token();
+ } else {
+ eat_statement();
+ }
+ return NULL;
}
while(true) {
fprintf(stderr, "multiple definition of symbol '%s'\n",
declaration->symbol->string);
parser_print_error_prefix_pos(previous->source_position);
- fprintf(stderr, "this is the location of the previous "
- "definition.\n");
+ fprintf(stderr, "this is the location of the previous definition.\n");
}
static void parse_init_declarators(const declaration_specifiers_t *specifiers)
type_t *type = declaration->type;
if(type->type != TYPE_FUNCTION && declaration->is_inline) {
parser_print_warning_prefix_pos(declaration->source_position);
- fprintf(stderr, "variable ‘%s’ declared ‘inline’\n",
+ fprintf(stderr, "variable '%s' declared 'inline'\n",
declaration->symbol->string);
}
conditional->condition = expression;
/* 6.5.15.2 */
- type_t *condition_type = conditional->condition->datatype;
- if(condition_type != NULL) {
- if(!is_type_scalar(skip_typeref(condition_type))) {
- type_error("expected a scalar type", expression->source_position,
- condition_type);
- }
+ type_t *condition_type_orig = conditional->condition->datatype;
+ type_t *condition_type = skip_typeref(condition_type_orig);
+ if(condition_type != NULL && !is_type_scalar(condition_type)) {
+ type_error("expected a scalar type", expression->source_position,
+ condition_type_orig);
}
conditional->true_expression = parse_expression();
projects / cparser / commitdiff