static type_t *type_long_double = NULL;
static type_t *type_double = NULL;
static type_t *type_float = NULL;
-static type_t *type_const_char = NULL;
+static type_t *type_char = NULL;
static type_t *type_string = NULL;
static type_t *type_void = NULL;
static type_t *type_void_ptr = NULL;
return res;
}
+static inline size_t get_initializer_size(initializer_type_t type)
+{
+ static const size_t size[] = {
+ [INITIALIZER_VALUE] = sizeof(initializer_value_t),
+ [INITIALIZER_STRING] = sizeof(initializer_string_t),
+ [INITIALIZER_LIST] = sizeof(initializer_list_t)
+ };
+ assert(type < INITIALIZER_COUNT);
+ assert(size[type] != 0);
+ return size[type];
+}
+
+static inline initializer_t *allocate_initializer(initializer_type_t type)
+{
+ initializer_t *result = allocate_ast_zero(get_initializer_size(type));
+ result->type = type;
+
+ return result;
+}
+
static inline void free_type(void *type)
{
obstack_free(type_obst, type);
if(source_type == dest_type)
return expression;
- if(dest_type->type == TYPE_ATOMIC) {
- if(source_type->type != TYPE_ATOMIC)
- panic("casting of non-atomic types not implemented yet");
-
- if(is_type_floating(dest_type) && !is_type_scalar(source_type)) {
- type_error_incompatible("can't cast types",
- expression->source_position,
- source_type, dest_type);
- return expression;
- }
-
- return create_cast_expression(expression, dest_type);
- }
- if(dest_type->type == TYPE_POINTER) {
- pointer_type_t *pointer_type
- = (pointer_type_t*) dest_type;
- switch (source_type->type) {
- case TYPE_ATOMIC:
- if (is_null_expression(expression)) {
- return create_cast_expression(expression, dest_type);
- }
- break;
-
- case TYPE_POINTER:
- if (pointers_compatible(source_type, dest_type)) {
- return create_cast_expression(expression, dest_type);
- }
- break;
+ switch (dest_type->type) {
+ case TYPE_ENUM:
+ /* TODO warning for implicitly converting to enum */
+ case TYPE_ATOMIC:
+ if (source_type->type != TYPE_ATOMIC &&
+ source_type->type != TYPE_ENUM) {
+ panic("casting of non-atomic types not implemented yet");
+ }
- case TYPE_ARRAY: {
- array_type_t *const array_type = (array_type_t*) source_type;
- if (types_compatible(array_type->element_type,
- pointer_type->points_to)) {
- return create_cast_expression(expression, dest_type);
- }
- break;
+ if(is_type_floating(dest_type) && !is_type_scalar(source_type)) {
+ type_error_incompatible("can't cast types",
+ expression->source_position, source_type, dest_type);
+ return expression;
}
- default:
- panic("casting of non-atomic types not implemented yet");
- }
+ return create_cast_expression(expression, dest_type);
- type_error_incompatible("can't implicitly cast types",
- expression->source_position,
- source_type, dest_type);
- return expression;
- }
+ case TYPE_POINTER:
+ switch (source_type->type) {
+ case TYPE_ATOMIC:
+ if (is_null_expression(expression)) {
+ return create_cast_expression(expression, dest_type);
+ }
+ break;
- panic("casting of non-atomic types not implemented yet");
-}
+ case TYPE_POINTER:
+ if (pointers_compatible(source_type, dest_type)) {
+ return create_cast_expression(expression, dest_type);
+ }
+ break;
-static bool is_atomic_type(const type_t *type, atomic_type_type_t atype)
-{
- if(type->type != TYPE_ATOMIC)
- return false;
- const atomic_type_t *atomic_type = (const atomic_type_t*) type;
+ case TYPE_ARRAY: {
+ array_type_t *array_type = (array_type_t*) source_type;
+ pointer_type_t *pointer_type
+ = (pointer_type_t*) dest_type;
+ if (types_compatible(array_type->element_type,
+ pointer_type->points_to)) {
+ return create_cast_expression(expression, dest_type);
+ }
+ break;
+ }
- return atomic_type->atype == atype;
-}
+ default:
+ panic("casting of non-atomic types not implemented yet");
+ }
-static bool is_pointer(const type_t *type)
-{
- return type->type == TYPE_POINTER;
-}
+ type_error_incompatible("can't implicitly cast types",
+ expression->source_position, source_type, dest_type);
+ return expression;
-static bool is_compound_type(const type_t *type)
-{
- return type->type == TYPE_COMPOUND_STRUCT
- || type->type == TYPE_COMPOUND_UNION;
+ default:
+ panic("casting of non-atomic types not implemented yet");
+ }
}
/** Implements the rules from § 6.5.16.1 */
type_t *const type_right = skip_typeref(orig_type_right);
if ((is_type_arithmetic(type_left) && is_type_arithmetic(type_right)) ||
- (is_pointer(type_left) && is_null_expression(*right)) ||
- (is_atomic_type(type_left, ATOMIC_TYPE_BOOL)
- && is_pointer(type_right))) {
+ (is_type_pointer(type_left) && is_null_expression(*right)) ||
+ (is_type_atomic(type_left, ATOMIC_TYPE_BOOL)
+ && is_type_pointer(type_right))) {
*right = create_implicit_cast(*right, type_left);
return;
}
- if (is_pointer(type_left) && is_pointer(type_right)) {
+ if (is_type_pointer(type_left) && is_type_pointer(type_right)) {
pointer_type_t *pointer_type_left = (pointer_type_t*) type_left;
pointer_type_t *pointer_type_right = (pointer_type_t*) type_right;
type_t *points_to_left = pointer_type_left->points_to;
type_t *points_to_right = pointer_type_right->points_to;
- if(!is_atomic_type(points_to_left, ATOMIC_TYPE_VOID)
- && !is_atomic_type(points_to_right, ATOMIC_TYPE_VOID)
+ points_to_left = skip_typeref(points_to_left);
+ points_to_right = skip_typeref(points_to_right);
+
+ if(!is_type_atomic(points_to_left, ATOMIC_TYPE_VOID)
+ && !is_type_atomic(points_to_right, ATOMIC_TYPE_VOID)
&& !types_compatible(points_to_left, points_to_right)) {
goto incompatible_assign_types;
}
return;
}
- if (is_compound_type(type_left)
+ if (is_type_compound(type_left)
&& types_compatible(type_left, type_right)) {
*right = create_implicit_cast(*right, type_left);
return;
/* TODO: check len vs. size of array type */
(void) type;
- initializer_string_t *initializer
- = allocate_ast_zero(sizeof(initializer[0]));
+ initializer_t *initializer = allocate_initializer(INITIALIZER_STRING);
+ initializer->string.string = string;
- initializer->initializer.type = INITIALIZER_STRING;
- initializer->string = string;
-
- return (initializer_t*) initializer;
+ return initializer;
}
static initializer_t *initializer_from_expression(type_t *type,
expression_t *expression)
{
-
/* TODO check that expression is a constant expression */
/* § 6.7.8.14/15 char array may be initialized by string literals */
semantic_assign(type, &expression, "initializer");
- initializer_value_t *result = allocate_ast_zero(sizeof(result[0]));
- result->initializer.type = INITIALIZER_VALUE;
- result->value = expression;
+ initializer_t *result = allocate_initializer(INITIALIZER_VALUE);
+ result->value.value = expression;
- return (initializer_t*) result;
+ return result;
}
static initializer_t *parse_sub_initializer(type_t *type,
/* TODO: ignore qualifiers, comparing pointers is probably
* not correct */
if(expression != NULL && expression_type == type) {
- initializer_value_t *result = allocate_ast_zero(sizeof(result[0]));
- result->initializer.type = INITIALIZER_VALUE;
+ initializer_t *result = allocate_initializer(INITIALIZER_VALUE);
if(type != NULL) {
semantic_assign(type, &expression, "initializer");
}
- result->value = expression;
+ result->value.value = expression;
- return (initializer_t*) result;
+ return result;
}
bool read_paren = false;
if(token.type == '}')
break;
expect_block(',');
+ if(token.type == '}')
+ break;
type_t *iter_type = iter->type;
iter_type = skip_typeref(iter_type);
return declaration;
}
-static void parse_enum_entries(type_t *enum_type)
+static void parse_enum_entries(enum_type_t *const enum_type)
{
eat('{');
return;
}
entry->storage_class = STORAGE_CLASS_ENUM_ENTRY;
- entry->type = enum_type;
+ entry->type = (type_t*) enum_type;
entry->symbol = token.v.symbol;
entry->source_position = token.source_position;
next_token();
expect_void('}');
}
-static declaration_t *parse_enum_specifier(void)
+static type_t *parse_enum_specifier(void)
{
eat(T_enum);
declaration->symbol = symbol;
}
+ enum_type_t *const enum_type = allocate_type_zero(sizeof(enum_type[0]));
+ enum_type->type.type = TYPE_ENUM;
+ enum_type->declaration = declaration;
+
if(token.type == '{') {
if(declaration->init.is_defined) {
parser_print_error_prefix();
record_declaration(declaration);
declaration->init.is_defined = 1;
- parse_enum_entries(NULL);
+ parse_enum_entries(enum_type);
parse_attributes();
}
- return declaration;
+ return (type_t*) enum_type;
}
/**
/* TODO: if type != NULL for the following rules should issue
* an error */
case T_struct: {
- compound_type_t *compound_type
- = allocate_type_zero(sizeof(compound_type[0]));
- compound_type->type.type = TYPE_COMPOUND_STRUCT;
- compound_type->declaration = parse_compound_type_specifier(true);
+ type = allocate_type_zero(sizeof(struct compound_type_t));
- type = (type_t*) compound_type;
+ compound_type_t *compound_type = (compound_type_t*) type;
+ compound_type->type.type = TYPE_COMPOUND_STRUCT;
+ compound_type->declaration = parse_compound_type_specifier(true);
break;
}
case T_union: {
- compound_type_t *compound_type
- = allocate_type_zero(sizeof(compound_type[0]));
- compound_type->type.type = TYPE_COMPOUND_UNION;
- compound_type->declaration = parse_compound_type_specifier(false);
+ type = allocate_type_zero(sizeof(compound_type_t));
- type = (type_t*) compound_type;
+ compound_type_t *compound_type = (compound_type_t*) type;
+ compound_type->type.type = TYPE_COMPOUND_UNION;
+ compound_type->declaration = parse_compound_type_specifier(false);
break;
}
- case T_enum: {
- enum_type_t *enum_type = allocate_type_zero(sizeof(enum_type[0]));
- enum_type->type.type = TYPE_ENUM;
- enum_type->declaration = parse_enum_specifier();
-
- type = (type_t*) enum_type;
+ case T_enum:
+ type = parse_enum_specifier();
break;
- }
case T___typeof__:
type = parse_typeof();
break;
specifiers->type = result;
}
-static unsigned parse_type_qualifiers(void)
+static type_qualifiers_t parse_type_qualifiers(void)
{
- unsigned type_qualifiers = TYPE_QUALIFIER_NONE;
+ type_qualifiers_t type_qualifiers = TYPE_QUALIFIER_NONE;
while(true) {
switch(token.type) {
if (declaration->type->type == TYPE_ARRAY) {
const array_type_t *const arr_type =
(const array_type_t*)declaration->type;
- declaration->type =
- make_pointer_type(arr_type->element_type, TYPE_QUALIFIER_NONE);
+ type_t *element_type = arr_type->element_type;
+ declaration->type = make_pointer_type(element_type, TYPE_QUALIFIER_NONE);
}
return declaration;
typedef struct parsed_pointer_t parsed_pointer_t;
struct parsed_pointer_t {
construct_type_t construct_type;
- type_qualifier_t type_qualifiers;
+ type_qualifiers_t type_qualifiers;
};
typedef struct construct_function_type_t construct_function_type_t;
typedef struct parsed_array_t parsed_array_t;
struct parsed_array_t {
construct_type_t construct_type;
- type_qualifier_t type_qualifiers;
+ type_qualifiers_t type_qualifiers;
bool is_static;
bool is_variable;
expression_t *size;
next_token();
}
- type_qualifier_t type_qualifiers = parse_type_qualifiers();
+ type_qualifiers_t type_qualifiers = parse_type_qualifiers();
if(type_qualifiers != 0) {
if(token.type == T_static) {
array->is_static = true;
cnst->expression.datatype = type_size_t;
if(initializer->type == INITIALIZER_LIST) {
- initializer_list_t *list
- = (initializer_list_t*) initializer;
+ initializer_list_t *list = &initializer->list;
cnst->v.int_value = list->len;
} else {
assert(initializer->type == INITIALIZER_STRING);
- initializer_string_t *string
- = (initializer_string_t*) initializer;
+ initializer_string_t *string = &initializer->string;
cnst->v.int_value = strlen(string->string) + 1;
}
return declaration;
}
+static type_t *make_function_1_type(type_t *result_type, type_t *argument_type)
+{
+ function_parameter_t *parameter = allocate_type_zero(sizeof(parameter[0]));
+ parameter->type = argument_type;
+
+ function_type_t *type = allocate_type_zero(sizeof(type[0]));
+ type->type.type = TYPE_FUNCTION;
+ type->result_type = result_type;
+ type->parameters = parameter;
+
+ type_t *result = typehash_insert((type_t*) type);
+ if(result != (type_t*) type) {
+ free_type(type);
+ }
+
+ return result;
+}
+
+static type_t *get_builtin_symbol_type(symbol_t *symbol)
+{
+ switch(symbol->ID) {
+ case T___builtin_alloca:
+ return make_function_1_type(type_void_ptr, type_size_t);
+ default:
+ panic("not implemented builtin symbol found");
+ }
+}
+
+/**
+ * performs automatic type cast as described in § 6.3.2.1
+ */
+static type_t *automatic_type_conversion(type_t *type)
+{
+ if(type == NULL)
+ return NULL;
+
+ if(type->type == TYPE_ARRAY) {
+ array_type_t *array_type = (array_type_t*) type;
+ type_t *element_type = array_type->element_type;
+ unsigned qualifiers = array_type->type.qualifiers;
+
+ return make_pointer_type(element_type, qualifiers);
+ }
+
+ if(type->type == TYPE_FUNCTION) {
+ return make_pointer_type(type, TYPE_QUALIFIER_NONE);
+ }
+
+ return type;
+}
+
+/**
+ * reverts the automatic casts of array to pointer types and function
+ * to function-pointer types as defined § 6.3.2.1
+ */
+type_t *revert_automatic_type_conversion(const expression_t *expression)
+{
+ if(expression->datatype == NULL)
+ return NULL;
+
+ switch(expression->type) {
+ case EXPR_REFERENCE: {
+ const reference_expression_t *ref
+ = (const reference_expression_t*) expression;
+ return ref->declaration->type;
+ }
+ case EXPR_SELECT: {
+ const select_expression_t *select
+ = (const select_expression_t*) expression;
+ return select->compound_entry->type;
+ }
+ case EXPR_UNARY: {
+ const unary_expression_t *unary
+ = (const unary_expression_t*) expression;
+ if(unary->type == UNEXPR_DEREFERENCE) {
+ expression_t *value = unary->value;
+ type_t *type = skip_typeref(value->datatype);
+ pointer_type_t *pointer_type = (pointer_type_t*) type;
+
+ return pointer_type->points_to;
+ }
+ break;
+ }
+ case EXPR_BUILTIN_SYMBOL: {
+ const builtin_symbol_expression_t *builtin
+ = (const builtin_symbol_expression_t*) expression;
+ return get_builtin_symbol_type(builtin->symbol);
+ }
+ case EXPR_ARRAY_ACCESS: {
+ const array_access_expression_t *array_access
+ = (const array_access_expression_t*) expression;
+ type_t *type_left = skip_typeref(array_access->array_ref->datatype);
+ assert(is_type_pointer(type_left));
+ pointer_type_t *pointer_type = (pointer_type_t*) type_left;
+ return pointer_type->points_to;
+ }
+
+ default:
+ break;
+ }
+
+ return expression->datatype;
+}
+
static expression_t *parse_reference(void)
{
reference_expression_t *ref = allocate_ast_zero(sizeof(ref[0]));
}
}
+ type_t *type = declaration->type;
+ /* we always do the auto-type conversions; the & and sizeof parser contains
+ * code to revert this! */
+ type = automatic_type_conversion(type);
+
ref->declaration = declaration;
- ref->expression.datatype = declaration->type;
+ ref->expression.datatype = type;
return (expression_t*) ref;
}
return (expression_t*) expression;
}
-static type_t *make_function_1_type(type_t *result_type, type_t *argument_type)
-{
- function_parameter_t *parameter = allocate_type_zero(sizeof(parameter[0]));
- parameter->type = argument_type;
-
- function_type_t *type = allocate_type_zero(sizeof(type[0]));
- type->type.type = TYPE_FUNCTION;
- type->result_type = result_type;
- type->parameters = parameter;
-
- type_t *result = typehash_insert((type_t*) type);
- if(result != (type_t*) type) {
- free_type(type);
- }
-
- return result;
-}
-
static expression_t *parse_builtin_symbol(void)
{
builtin_symbol_expression_t *expression
expression->expression.type = EXPR_BUILTIN_SYMBOL;
expression->symbol = token.v.symbol;
-
- type_t *type;
- switch(token.type) {
- case T___builtin_alloca:
- type = make_function_1_type(type_void_ptr, type_size_t);
- break;
- }
-
next_token();
+ type_t *type = get_builtin_symbol_type(expression->symbol);
+ type = automatic_type_conversion(type);
+
expression->expression.datatype = type;
return (expression_t*) expression;
}
}
static expression_t *parse_array_expression(unsigned precedence,
- expression_t *array_ref)
+ expression_t *left)
{
(void) precedence;
eat('[');
- expression_t *index = parse_expression();
+ expression_t *inside = parse_expression();
array_access_expression_t *array_access
= allocate_ast_zero(sizeof(array_access[0]));
array_access->expression.type = EXPR_ARRAY_ACCESS;
- array_access->array_ref = array_ref;
- array_access->index = index;
-
- type_t *type_left = skip_typeref(array_ref->datatype);
- type_t *type_right = skip_typeref(index->datatype);
-
- if(type_left != NULL && type_right != NULL) {
- if(type_left->type == TYPE_POINTER) {
- pointer_type_t *pointer = (pointer_type_t*) type_left;
- array_access->expression.datatype = pointer->points_to;
- } else if(type_left->type == TYPE_ARRAY) {
- array_type_t *array_type = (array_type_t*) type_left;
- array_access->expression.datatype = array_type->element_type;
- } else if(type_right->type == TYPE_POINTER) {
- pointer_type_t *pointer = (pointer_type_t*) type_right;
- array_access->expression.datatype = pointer->points_to;
- } else if(type_right->type == TYPE_ARRAY) {
- array_type_t *array_type = (array_type_t*) type_right;
- array_access->expression.datatype = array_type->element_type;
+
+ type_t *type_left = skip_typeref(left->datatype);
+ type_t *type_inside = skip_typeref(inside->datatype);
+ type_t *result_type;
+
+ if(type_left != NULL && type_inside != NULL) {
+ if(is_type_pointer(type_left)) {
+ pointer_type_t *pointer = (pointer_type_t*) type_left;
+ result_type = pointer->points_to;
+ array_access->array_ref = left;
+ array_access->index = inside;
+ } else if(is_type_pointer(type_inside)) {
+ pointer_type_t *pointer = (pointer_type_t*) type_inside;
+ result_type = pointer->points_to;
+ array_access->array_ref = inside;
+ array_access->index = left;
+ array_access->flipped = true;
} else {
parser_print_error_prefix();
fprintf(stderr, "array access on object with non-pointer types ");
print_type_quoted(type_left);
fprintf(stderr, ", ");
- print_type_quoted(type_right);
+ print_type_quoted(type_inside);
fprintf(stderr, "\n");
}
+ } else {
+ array_access->array_ref = left;
+ array_access->index = inside;
}
if(token.type != ']') {
}
next_token();
+ result_type = automatic_type_conversion(result_type);
+ array_access->expression.datatype = result_type;
+
return (expression_t*) array_access;
}
sizeof_expression->type = parse_typename();
expect(')');
} else {
- expression_t *expression = parse_sub_expression(precedence);
+ expression_t *expression = parse_sub_expression(precedence);
+ expression->datatype = revert_automatic_type_conversion(expression);
+
sizeof_expression->type = expression->datatype;
sizeof_expression->size_expression = expression;
}
return make_invalid_expression();
}
+ /* we always do the auto-type conversions; the & and sizeof parser contains
+ * code to revert this! */
+ type_t *expression_type = automatic_type_conversion(iter->type);
+
select->compound_entry = iter;
- select->expression.datatype = iter->type;
+ select->expression.datatype = expression_type;
return (expression_t*) select;
}
function_type_t *function_type;
type_t *orig_type = expression->datatype;
- type_t *type = skip_typeref(orig_type);
+ if(orig_type != NULL) {
+ function_type = NULL;
+ type_t *type = skip_typeref(orig_type);
- if(type->type == TYPE_POINTER) {
- pointer_type_t *pointer_type = (pointer_type_t*) type;
+ if(is_type_pointer(type)) {
+ pointer_type_t *pointer_type = (pointer_type_t*) type;
- type = skip_typeref(pointer_type->points_to);
- }
- if (type->type == TYPE_FUNCTION) {
- function_type = (function_type_t*) type;
- call->expression.datatype = function_type->result_type;
- } else {
- parser_print_error_prefix();
- fputs("called object '", stderr);
- print_expression(expression);
- fputs("' (type ", stderr);
- print_type_quoted(orig_type);
- fputs(") is not a function\n", stderr);
+ type = skip_typeref(pointer_type->points_to);
- function_type = NULL;
- call->expression.datatype = NULL;
+ if (type->type == TYPE_FUNCTION) {
+ function_type = (function_type_t*) type;
+ call->expression.datatype = function_type->result_type;
+ }
+ }
+ if(function_type == NULL) {
+ parser_print_error_prefix();
+ fputs("called object '", stderr);
+ print_expression(expression);
+ fputs("' (type ", stderr);
+ print_type_quoted(orig_type);
+ fputs(") is not a pointer to a function\n", stderr);
+
+ function_type = NULL;
+ call->expression.datatype = NULL;
+ }
}
/* parse arguments */
return;
type_t *type = skip_typeref(orig_type);
- switch (type->type) {
- case TYPE_ARRAY: {
- array_type_t *const array_type = (array_type_t*)type;
- expression->expression.datatype = array_type->element_type;
- break;
- }
+ if(!is_type_pointer(type)) {
+ parser_print_error_prefix();
+ fputs("'Unary *' needs pointer or arrray type, but type ", stderr);
+ print_type_quoted(orig_type);
+ fputs(" given.\n", stderr);
+ return;
+ }
- case TYPE_POINTER: {
- pointer_type_t *pointer_type = (pointer_type_t*)type;
- expression->expression.datatype = pointer_type->points_to;
- break;
- }
+ pointer_type_t *pointer_type = (pointer_type_t*)type;
+ type_t *result_type = pointer_type->points_to;
- default:
- parser_print_error_prefix();
- fputs("'Unary *' needs pointer or arrray type, but type ", stderr);
- print_type_quoted(orig_type);
- fputs(" given.\n", stderr);
- return;
- }
+ result_type = automatic_type_conversion(result_type);
+ expression->expression.datatype = result_type;
}
static void semantic_take_addr(unary_expression_t *expression)
{
- type_t *orig_type = expression->value->datatype;
+ expression_t *value = expression->value;
+ value->datatype = revert_automatic_type_conversion(value);
+
+ type_t *orig_type = value->datatype;
if(orig_type == NULL)
return;
- expression_t *value = expression->value;
if(value->type == EXPR_REFERENCE) {
reference_expression_t *reference = (reference_expression_t*) value;
declaration_t *declaration = reference->declaration;
}
}
- expression->expression.datatype = make_pointer_type(orig_type, 0);
+ expression->expression.datatype = make_pointer_type(orig_type, TYPE_QUALIFIER_NONE);
}
#define CREATE_UNARY_EXPRESSION_PARSER(token_type, unexpression_type, sfunc) \
expression->right = create_implicit_cast(right, arithmetic_type);
expression->expression.datatype = arithmetic_type;
return;
- } else if(type_left->type == TYPE_POINTER && is_type_integer(type_right)) {
+ } else if(is_type_pointer(type_left) && is_type_integer(type_right)) {
expression->expression.datatype = type_left;
- } else if(type_right->type == TYPE_POINTER && is_type_integer(type_left)) {
+ } else if(is_type_pointer(type_right) && is_type_integer(type_left)) {
expression->expression.datatype = type_right;
- } else if (type_left->type == TYPE_ARRAY && is_type_integer(type_right)) {
- const array_type_t *const arr_type = (const array_type_t*)type_left;
- expression->expression.datatype =
- make_pointer_type(arr_type->element_type, TYPE_QUALIFIER_NONE);
- } else if (type_right->type == TYPE_ARRAY && is_type_integer(type_left)) {
- const array_type_t *const arr_type = (const array_type_t*)type_right;
- expression->expression.datatype =
- make_pointer_type(arr_type->element_type, TYPE_QUALIFIER_NONE);
} else {
parser_print_error_prefix();
fprintf(stderr, "invalid operands to binary + (");
expression->expression.datatype = type_int;
}
+static bool has_const_fields(type_t *type)
+{
+ (void) type;
+ /* TODO */
+ return false;
+}
+
static void semantic_binexpr_assign(binary_expression_t *expression)
{
expression_t *left = expression->left;
if(orig_type_left == NULL)
return;
- type_t *type_left = skip_typeref(orig_type_left);
+ type_t *type_left = revert_automatic_type_conversion(left);
+ type_left = skip_typeref(orig_type_left);
+ /* must be a modifiable lvalue */
if (type_left->type == TYPE_ARRAY) {
- parse_error("Cannot assign to arrays.");
+ parser_print_error_prefix();
+ fprintf(stderr, "Cannot assign to arrays ('");
+ print_expression(left);
+ fprintf(stderr, "')\n");
return;
}
-
if(type_left->qualifiers & TYPE_QUALIFIER_CONST) {
parser_print_error_prefix();
fprintf(stderr, "assignment to readonly location '");
fprintf(stderr, "' (type ");
print_type_quoted(orig_type_left);
fprintf(stderr, ")\n");
+ return;
+ }
+ if(is_type_incomplete(type_left)) {
+ parser_print_error_prefix();
+ fprintf(stderr, "left-hand side of assignment '");
+ print_expression(left);
+ fprintf(stderr, "' has incomplete type ");
+ print_type_quoted(orig_type_left);
+ fprintf(stderr, "\n");
+ return;
+ }
+ if(is_type_compound(type_left) && has_const_fields(type_left)) {
+ parser_print_error_prefix();
+ fprintf(stderr, "can't assign to '");
+ print_expression(left);
+ fprintf(stderr, "' because compound type ");
+ print_type_quoted(orig_type_left);
+ fprintf(stderr, " has readonly fields\n");
+ return;
}
semantic_assign(orig_type_left, &expression->right, "assignment");
init_expression_parsers();
obstack_init(&temp_obst);
- type_int = make_atomic_type(ATOMIC_TYPE_INT, 0);
- type_uint = make_atomic_type(ATOMIC_TYPE_UINT, 0);
- type_long_double = make_atomic_type(ATOMIC_TYPE_LONG_DOUBLE, 0);
- type_double = make_atomic_type(ATOMIC_TYPE_DOUBLE, 0);
- type_float = make_atomic_type(ATOMIC_TYPE_FLOAT, 0);
- type_size_t = make_atomic_type(ATOMIC_TYPE_ULONG, 0);
- type_ptrdiff_t = make_atomic_type(ATOMIC_TYPE_LONG, 0);
- type_const_char = make_atomic_type(ATOMIC_TYPE_CHAR, TYPE_QUALIFIER_CONST);
- type_void = make_atomic_type(ATOMIC_TYPE_VOID, 0);
- type_void_ptr = make_pointer_type(type_void, 0);
- type_string = make_pointer_type(type_const_char, 0);
+ type_int = make_atomic_type(ATOMIC_TYPE_INT, TYPE_QUALIFIER_NONE);
+ type_uint = make_atomic_type(ATOMIC_TYPE_UINT, TYPE_QUALIFIER_NONE);
+ type_long_double = make_atomic_type(ATOMIC_TYPE_LONG_DOUBLE, TYPE_QUALIFIER_NONE);
+ type_double = make_atomic_type(ATOMIC_TYPE_DOUBLE, TYPE_QUALIFIER_NONE);
+ type_float = make_atomic_type(ATOMIC_TYPE_FLOAT, TYPE_QUALIFIER_NONE);
+ type_size_t = make_atomic_type(ATOMIC_TYPE_ULONG, TYPE_QUALIFIER_NONE);
+ type_ptrdiff_t = make_atomic_type(ATOMIC_TYPE_LONG, TYPE_QUALIFIER_NONE);
+ type_char = make_atomic_type(ATOMIC_TYPE_CHAR, TYPE_QUALIFIER_NONE);
+ type_void = make_atomic_type(ATOMIC_TYPE_VOID, TYPE_QUALIFIER_NONE);
+ type_void_ptr = make_pointer_type(type_void, TYPE_QUALIFIER_NONE);
+ type_string = make_pointer_type(type_char, TYPE_QUALIFIER_NONE);
}
void exit_parser(void)
projects / cparser / blobdiff