static entity_t *get_entity(const symbol_t *const symbol,
namespace_tag_t namespc)
{
+ assert(namespc != NAMESPACE_INVALID);
entity_t *entity = symbol->entity;
for (; entity != NULL; entity = entity->base.symbol_next) {
if (entity->base.namespc == namespc)
}
type_t *const type = skip_typeref(expression->base.type);
- return
- is_type_integer(type) &&
- is_constant_expression(expression) &&
- !fold_constant_to_bool(expression);
+ if (!is_type_integer(type))
+ return false;
+ switch (is_constant_expression(expression)) {
+ case EXPR_CLASS_ERROR: return true;
+ case EXPR_CLASS_CONSTANT: return !fold_constant_to_bool(expression);
+ default: return false;
+ }
}
/**
(is_type_atomic(type_left, ATOMIC_TYPE_BOOL)
&& is_type_pointer(type_right))) {
return ASSIGN_SUCCESS;
- } else if ((is_type_compound(type_left) && is_type_compound(type_right))
- || (is_type_builtin(type_left) && is_type_builtin(type_right))) {
+ } else if (is_type_compound(type_left) && is_type_compound(type_right)) {
type_t *const unqual_type_left = get_unqualified_type(type_left);
type_t *const unqual_type_right = get_unqualified_type(type_right);
if (types_compatible(unqual_type_left, unqual_type_right)) {
{
expression_t *result = parse_subexpression(PREC_CONDITIONAL);
- if (!is_constant_expression(result)) {
+ if (is_constant_expression(result) == EXPR_CLASS_VARIABLE) {
errorf(&result->base.source_position,
"expression '%E' is not constant", result);
}
symbol_t *symbol = get_symbol_from_token();
if (symbol == NULL) {
parse_error_expected("while parsing attribute((", T_IDENTIFIER, NULL);
- goto end_error;
+ return NULL;
}
const char *name = symbol->string;
attribute->a.arguments = parse_attribute_arguments();
return attribute;
-
-end_error:
- return NULL;
}
static attribute_t *parse_attribute_gnu(void)
switch (token.type) {
case T___attribute__:
attribute = parse_attribute_gnu();
+ if (attribute == NULL)
+ continue;
break;
case T_asm:
*/
static bool is_initializer_constant(const expression_t *expression)
{
- return is_constant_expression(expression)
- || is_address_constant(expression);
+ return
+ is_constant_expression(expression) != EXPR_CLASS_VARIABLE ||
+ is_address_constant(expression) != EXPR_CLASS_VARIABLE;
}
/**
{
eat(is_struct ? T_struct : T_union);
- symbol_t *symbol = NULL;
- compound_t *compound = NULL;
+ symbol_t *symbol = NULL;
+ entity_t *entity = NULL;
attribute_t *attributes = NULL;
if (token.type == T___attribute__) {
symbol = token.symbol;
next_token();
- entity_t *entity = get_tag(symbol, kind);
+ entity = get_tag(symbol, kind);
if (entity != NULL) {
- compound = &entity->compound;
- if (compound->base.parent_scope != current_scope &&
+ if (entity->base.parent_scope != current_scope &&
(token.type == '{' || token.type == ';')) {
/* we're in an inner scope and have a definition. Shadow
* existing definition in outer scope */
- compound = NULL;
- } else if (compound->complete && token.type == '{') {
+ entity = NULL;
+ } else if (entity->compound.complete && token.type == '{') {
assert(symbol != NULL);
errorf(HERE, "multiple definitions of '%s %Y' (previous definition %P)",
is_struct ? "struct" : "union", symbol,
- &compound->base.source_position);
+ &entity->base.source_position);
/* clear members in the hope to avoid further errors */
- compound->members.entities = NULL;
+ entity->compound.members.entities = NULL;
}
}
} else if (token.type != '{') {
return NULL;
}
- if (compound == NULL) {
- entity_t *entity = allocate_entity_zero(kind);
- compound = &entity->compound;
+ if (entity == NULL) {
+ entity = allocate_entity_zero(kind);
- compound->alignment = 1;
- compound->base.namespc = NAMESPACE_TAG;
- compound->base.source_position = token.source_position;
- compound->base.symbol = symbol;
- compound->base.parent_scope = current_scope;
+ entity->compound.alignment = 1;
+ entity->base.namespc = NAMESPACE_TAG;
+ entity->base.source_position = token.source_position;
+ entity->base.symbol = symbol;
+ entity->base.parent_scope = current_scope;
if (symbol != NULL) {
environment_push(entity);
}
}
if (token.type == '{') {
- parse_compound_type_entries(compound);
+ parse_compound_type_entries(&entity->compound);
/* ISO/IEC 14882:1998(E) §7.1.3:5 */
if (symbol == NULL) {
assert(anonymous_entity == NULL);
- anonymous_entity = (entity_t*)compound;
+ anonymous_entity = entity;
}
}
if (attributes != NULL) {
- handle_entity_attributes(attributes, (entity_t*) compound);
+ handle_entity_attributes(attributes, entity);
}
- return compound;
+ return &entity->compound;
}
static void parse_enum_entries(type_t *const enum_type)
entity_t *entity = allocate_entity_zero(ENTITY_ENUM_VALUE);
entity->enum_value.enum_type = enum_type;
+ entity->base.namespc = NAMESPACE_NORMAL;
entity->base.symbol = token.symbol;
entity->base.source_position = token.source_position;
next_token();
SPECIFIER_IMAGINARY = 1 << 18,
} specifiers_t;
-static type_t *create_builtin_type(symbol_t *const symbol,
- type_t *const real_type)
-{
- type_t *type = allocate_type_zero(TYPE_BUILTIN);
- type->builtin.symbol = symbol;
- type->builtin.real_type = real_type;
- return identify_new_type(type);
-}
-
static type_t *get_typedef_type(symbol_t *symbol)
{
entity_t *entity = get_entity(symbol, NAMESPACE_NORMAL);
static entity_t *create_error_entity(symbol_t *symbol, entity_kind_tag_t kind)
{
entity_t *entity = allocate_entity_zero(kind);
+ entity->base.namespc = NAMESPACE_NORMAL;
entity->base.source_position = *HERE;
entity->base.symbol = symbol;
if (is_declaration(entity)) {
break;
char const* wrong;
- case STORAGE_CLASS_AUTO: wrong = "auto"; goto wrong_thread_stoarge_class;
- case STORAGE_CLASS_REGISTER: wrong = "register"; goto wrong_thread_stoarge_class;
- case STORAGE_CLASS_TYPEDEF: wrong = "typedef"; goto wrong_thread_stoarge_class;
-wrong_thread_stoarge_class:
+ case STORAGE_CLASS_AUTO: wrong = "auto"; goto wrong_thread_storage_class;
+ case STORAGE_CLASS_REGISTER: wrong = "register"; goto wrong_thread_storage_class;
+ case STORAGE_CLASS_TYPEDEF: wrong = "typedef"; goto wrong_thread_storage_class;
+wrong_thread_storage_class:
errorf(HERE, "'__thread' used with '%s'", wrong);
break;
}
typedef struct construct_type_base_t {
construct_type_kind_t kind;
+ source_position_t pos;
construct_type_t *next;
} construct_type_base_t;
{
construct_type_t *const cons = obstack_alloc(&temp_obst, size);
memset(cons, 0, size);
- cons->kind = kind;
+ cons->kind = kind;
+ cons->base.pos = *HERE;
return cons;
}
/* §6.7.5.1 */
static construct_type_t *parse_pointer_declarator(void)
{
- eat('*');
-
construct_type_t *const cons = allocate_declarator_zero(CONSTRUCT_POINTER, sizeof(parsed_pointer_t));
+ eat('*');
cons->pointer.type_qualifiers = parse_type_qualifiers();
//cons->pointer.base_variable = base_variable;
/* ISO/IEC 14882:1998(E) §8.3.2 */
static construct_type_t *parse_reference_declarator(void)
{
- eat('&');
-
if (!(c_mode & _CXX))
errorf(HERE, "references are only available for C++");
construct_type_t *const cons = allocate_declarator_zero(CONSTRUCT_REFERENCE, sizeof(parsed_reference_t));
+ eat('&');
return cons;
}
/* §6.7.5.2 */
static construct_type_t *parse_array_declarator(void)
{
- eat('[');
- add_anchor_token(']');
-
construct_type_t *const cons = allocate_declarator_zero(CONSTRUCT_ARRAY, sizeof(parsed_array_t));
parsed_array_t *const array = &cons->array;
+ eat('[');
+ add_anchor_token(']');
+
bool is_static = next_if(T_static);
type_qualifiers_t type_qualifiers = parse_type_qualifiers();
/* §6.7.5.3 */
static construct_type_t *parse_function_declarator(scope_t *scope)
{
+ construct_type_t *const cons = allocate_declarator_zero(CONSTRUCT_FUNCTION, sizeof(construct_function_type_t));
+
type_t *type = allocate_type_zero(TYPE_FUNCTION);
function_type_t *ftype = &type->function;
parse_parameters(ftype, scope);
- construct_type_t *const cons = allocate_declarator_zero(CONSTRUCT_FUNCTION, sizeof(construct_function_type_t));
cons->function.function_type = type;
return cons;
}
next_token();
break;
- case '(':
- /* §6.7.6:2 footnote 126: Empty parentheses in a type name are
- * interpreted as ``function with no parameter specification'', rather
- * than redundant parentheses around the omitted identifier. */
- if (look_ahead(1)->type != ')') {
- next_token();
- add_anchor_token(')');
- inner_types = parse_inner_declarator(env);
- if (inner_types != NULL) {
- /* All later declarators only modify the return type */
- env->must_be_abstract = true;
- }
- rem_anchor_token(')');
- expect(')', end_error);
+
+ case '(': {
+ /* Parenthesized declarator or function declarator? */
+ token_t const *const la1 = look_ahead(1);
+ switch (la1->type) {
+ case T_IDENTIFIER:
+ if (is_typedef_symbol(la1->symbol)) {
+ case ')':
+ /* §6.7.6:2 footnote 126: Empty parentheses in a type name are
+ * interpreted as ``function with no parameter specification'', rather
+ * than redundant parentheses around the omitted identifier. */
+ default:
+ /* Function declarator. */
+ if (!env->may_be_abstract) {
+ errorf(HERE, "function declarator must have a name");
+ goto error_out;
+ }
+ } else {
+ case '(':
+ case '*':
+ case '[':
+ case T___attribute__: /* FIXME __attribute__ might also introduce a parameter of a function declarator. */
+ /* Paranthesized declarator. */
+ next_token();
+ add_anchor_token(')');
+ inner_types = parse_inner_declarator(env);
+ if (inner_types != NULL) {
+ /* All later declarators only modify the return type */
+ env->must_be_abstract = true;
+ }
+ rem_anchor_token(')');
+ expect(')', end_error);
+ }
+ break;
}
break;
+ }
+
default:
if (env->may_be_abstract)
break;
parse_error_expected("while parsing declarator", T_IDENTIFIER, '(', NULL);
+error_out:
eat_until_anchor();
return NULL;
}
{
construct_type_t *iter = construct_list;
for (; iter != NULL; iter = iter->base.next) {
+ source_position_t const* const pos = &iter->base.pos;
switch (iter->kind) {
case CONSTRUCT_INVALID:
break;
type_t *skipped_return_type = skip_typeref(type);
/* §6.7.5.3:1 */
if (is_type_function(skipped_return_type)) {
- errorf(HERE, "function returning function is not allowed");
+ errorf(pos, "function returning function is not allowed");
} else if (is_type_array(skipped_return_type)) {
- errorf(HERE, "function returning array is not allowed");
+ errorf(pos, "function returning array is not allowed");
} else {
if (skipped_return_type->base.qualifiers != 0 && warning.other) {
- warningf(HERE,
- "type qualifiers in return type of function type are meaningless");
+ warningf(pos, "type qualifiers in return type of function type are meaningless");
}
}
case CONSTRUCT_POINTER: {
if (is_type_reference(skip_typeref(type)))
- errorf(HERE, "cannot declare a pointer to reference");
+ errorf(pos, "cannot declare a pointer to reference");
parsed_pointer_t *pointer = &iter->pointer;
type = make_based_pointer_type(type, pointer->type_qualifiers, pointer->base_variable);
case CONSTRUCT_REFERENCE:
if (is_type_reference(skip_typeref(type)))
- errorf(HERE, "cannot declare a reference to reference");
+ errorf(pos, "cannot declare a reference to reference");
type = make_reference_type(type);
continue;
case CONSTRUCT_ARRAY: {
if (is_type_reference(skip_typeref(type)))
- errorf(HERE, "cannot declare an array of references");
+ errorf(pos, "cannot declare an array of references");
parsed_array_t *array = &iter->array;
type_t *array_type = allocate_type_zero(TYPE_ARRAY);
array_type->array.size_expression = size_expression;
if (size_expression != NULL) {
- if (is_constant_expression(size_expression)) {
- long const size
- = fold_constant_to_int(size_expression);
- array_type->array.size = size;
- array_type->array.size_constant = true;
- /* §6.7.5.2:1 If the expression is a constant expression, it shall
- * have a value greater than zero. */
- if (size <= 0) {
- if (size < 0 || !GNU_MODE) {
- errorf(&size_expression->base.source_position,
- "size of array must be greater than zero");
- } else if (warning.other) {
- warningf(&size_expression->base.source_position,
- "zero length arrays are a GCC extension");
+ switch (is_constant_expression(size_expression)) {
+ case EXPR_CLASS_CONSTANT: {
+ long const size = fold_constant_to_int(size_expression);
+ array_type->array.size = size;
+ array_type->array.size_constant = true;
+ /* §6.7.5.2:1 If the expression is a constant expression, it shall
+ * have a value greater than zero. */
+ if (size <= 0) {
+ if (size < 0 || !GNU_MODE) {
+ errorf(&size_expression->base.source_position,
+ "size of array must be greater than zero");
+ } else if (warning.other) {
+ warningf(&size_expression->base.source_position,
+ "zero length arrays are a GCC extension");
+ }
}
+ break;
}
- } else {
- array_type->array.is_vla = true;
+
+ case EXPR_CLASS_VARIABLE:
+ array_type->array.is_vla = true;
+ break;
+
+ case EXPR_CLASS_ERROR:
+ break;
}
}
type_t *skipped_type = skip_typeref(type);
/* §6.7.5.2:1 */
if (is_type_incomplete(skipped_type)) {
- errorf(HERE, "array of incomplete type '%T' is not allowed", type);
+ errorf(pos, "array of incomplete type '%T' is not allowed", type);
} else if (is_type_function(skipped_type)) {
- errorf(HERE, "array of functions is not allowed");
+ errorf(pos, "array of functions is not allowed");
}
type = identify_new_type(array_type);
continue;
}
}
- internal_errorf(HERE, "invalid type construction found");
+ internal_errorf(pos, "invalid type construction found");
}
return type;
entity_t *entity;
if (specifiers->storage_class == STORAGE_CLASS_TYPEDEF) {
entity = allocate_entity_zero(ENTITY_TYPEDEF);
+ entity->base.namespc = NAMESPACE_NORMAL;
entity->base.symbol = env.symbol;
entity->base.source_position = env.source_position;
entity->typedefe.type = orig_type;
storage_class_t storage_class = specifiers->storage_class;
entity->declaration.declared_storage_class = storage_class;
- if (storage_class == STORAGE_CLASS_NONE && current_function != NULL)
+ if (storage_class == STORAGE_CLASS_NONE && current_function != NULL)
storage_class = STORAGE_CLASS_AUTO;
entity->declaration.storage_class = storage_class;
}
}
const function_parameter_t *parm = func_type->parameters;
if (parm != NULL) {
- type_t *const first_type = parm->type;
- if (!types_compatible(skip_typeref(first_type), type_int)) {
+ type_t *const first_type = skip_typeref(parm->type);
+ type_t *const first_type_unqual = get_unqualified_type(first_type);
+ if (!types_compatible(first_type_unqual, type_int)) {
warningf(pos,
"first argument of 'main' should be 'int', but is '%T'",
- first_type);
+ parm->type);
}
parm = parm->next;
if (parm != NULL) {
- type_t *const second_type = parm->type;
- if (!types_compatible(skip_typeref(second_type), type_char_ptr_ptr)) {
- warningf(pos, "second argument of 'main' should be 'char**', but is '%T'", second_type);
+ type_t *const second_type = skip_typeref(parm->type);
+ type_t *const second_type_unqual
+ = get_unqualified_type(second_type);
+ if (!types_compatible(second_type_unqual, type_char_ptr_ptr)) {
+ warningf(pos, "second argument of 'main' should be 'char**', but is '%T'",
+ parm->type);
}
parm = parm->next;
if (parm != NULL) {
- type_t *const third_type = parm->type;
- if (!types_compatible(skip_typeref(third_type), type_char_ptr_ptr)) {
- warningf(pos, "third argument of 'main' should be 'char**', but is '%T'", third_type);
+ type_t *const third_type = skip_typeref(parm->type);
+ type_t *const third_type_unqual
+ = get_unqualified_type(third_type);
+ if (!types_compatible(third_type_unqual, type_char_ptr_ptr)) {
+ warningf(pos, "third argument of 'main' should be 'char**', but is '%T'",
+ parm->type);
}
parm = parm->next;
if (parm != NULL)
get_entity_kind_name(new_kind), &old->base.source_position);
}
-static bool is_error_entity(entity_t *const ent)
+static bool is_entity_valid(entity_t *const ent)
{
if (is_declaration(ent)) {
return is_type_valid(skip_typeref(ent->declaration.type));
} else if (ent->kind == ENTITY_TYPEDEF) {
return is_type_valid(skip_typeref(ent->typedefe.type));
}
- return false;
+ return true;
}
static bool contains_attribute(const attribute_t *list, const attribute_t *attr)
if (previous_entity->base.parent_scope == current_scope) {
if (previous_entity->kind != entity->kind) {
- if (!is_error_entity(previous_entity) && !is_error_entity(entity)) {
+ if (is_entity_valid(previous_entity) && is_entity_valid(entity)) {
error_redefined_as_different_kind(pos, previous_entity,
entity->kind);
}
} else {
unsigned old_storage_class = prev_decl->storage_class;
- if (warning.redundant_decls &&
+ if (warning.redundant_decls &&
is_definition &&
!prev_decl->used &&
!(prev_decl->modifiers & DM_USED) &&
static void parse_init_declarator_rest(entity_t *entity)
{
- assert(is_declaration(entity));
- declaration_t *const declaration = &entity->declaration;
+ type_t *orig_type = type_error_type;
+ if (entity->base.kind == ENTITY_TYPEDEF) {
+ errorf(&entity->base.source_position,
+ "typedef '%Y' is initialized (use __typeof__ instead)",
+ entity->base.symbol);
+ } else {
+ assert(is_declaration(entity));
+ orig_type = entity->declaration.type;
+ }
eat('=');
- type_t *orig_type = declaration->type;
- type_t *type = skip_typeref(orig_type);
+ type_t *type = skip_typeref(orig_type);
if (entity->kind == ENTITY_VARIABLE
&& entity->variable.initializer != NULL) {
parser_error_multiple_definition(entity, HERE);
}
+ declaration_t *const declaration = &entity->declaration;
bool must_be_constant = false;
if (declaration->storage_class == STORAGE_CLASS_STATIC ||
entity->base.parent_scope == file_scope) {
static int determine_truth(expression_t const* const cond)
{
return
- !is_constant_expression(cond) ? 0 :
- fold_constant_to_bool(cond) ? 1 :
+ is_constant_expression(cond) != EXPR_CLASS_CONSTANT ? 0 :
+ fold_constant_to_bool(cond) ? 1 :
-1;
}
if (!expression_returns(expr))
return;
- if (is_constant_expression(expr)) {
+ if (is_constant_expression(expr) == EXPR_CLASS_CONSTANT) {
long const val = fold_constant_to_int(expr);
case_label_statement_t * defaults = NULL;
for (case_label_statement_t *i = switchs->first_case; i != NULL; i = i->next) {
assert(entity->kind == ENTITY_FUNCTION);
assert(ndeclaration->kind == ENTITY_FUNCTION);
- function_t *function = &entity->function;
+ function_t *const function = &entity->function;
if (ndeclaration != entity) {
function->parameters = ndeclaration->function.parameters;
}
function_t *old_current_function = current_function;
entity_t *old_current_entity = current_entity;
current_function = function;
- current_entity = (entity_t*) function;
+ current_entity = entity;
current_parent = NULL;
goto_first = NULL;
assert(current_parent == NULL);
assert(current_function == function);
- assert(current_entity == (entity_t*) function);
+ assert(current_entity == entity);
current_entity = old_current_entity;
current_function = old_current_function;
label_pop_to(label_stack_top);
bit_size = get_type_size(base_type) * 8;
}
- if (is_constant_expression(size)) {
+ if (is_constant_expression(size) == EXPR_CLASS_CONSTANT) {
long v = fold_constant_to_int(size);
const symbol_t *user_symbol = symbol == NULL ? sym_anonymous : symbol;
literal->literal.value = token.literal;
size_t len = literal->literal.value.size;
- if (len != 1) {
+ if (len > 1) {
if (!GNU_MODE && !(c_mode & _C99)) {
errorf(HERE, "more than 1 character in character constant");
} else if (warning.multichar) {
literal->literal.value = token.literal;
size_t len = wstrlen(&literal->literal.value);
- if (len != 1) {
+ if (len > 1) {
warningf(HERE, "multi-character character constant");
}
entity->declaration.declared_storage_class = STORAGE_CLASS_EXTERN;
entity->declaration.type = type;
entity->declaration.implicit = true;
+ entity->base.namespc = NAMESPACE_NORMAL;
entity->base.symbol = symbol;
entity->base.source_position = *source_position;
}
errorf(HERE, "unexpected token %K, expected an expression", &token);
+ eat_until_anchor();
return create_invalid_expression();
}
tp_expression->typeprop.type = orig_type;
type_t const* const type = skip_typeref(orig_type);
- char const* const wrong_type =
- GNU_MODE && is_type_atomic(type, ATOMIC_TYPE_VOID) ? NULL :
- is_type_incomplete(type) ? "incomplete" :
- type->kind == TYPE_FUNCTION ? "function designator" :
- type->kind == TYPE_BITFIELD ? "bitfield" :
- NULL;
+ char const* wrong_type = NULL;
+ if (is_type_incomplete(type)) {
+ if (!is_type_atomic(type, ATOMIC_TYPE_VOID) || !GNU_MODE)
+ wrong_type = "incomplete";
+ } else if (type->kind == TYPE_FUNCTION) {
+ if (GNU_MODE) {
+ /* function types are allowed (and return 1) */
+ if (warning.other) {
+ char const* const what = kind == EXPR_SIZEOF ? "sizeof" : "alignof";
+ warningf(&tp_expression->base.source_position,
+ "%s expression with function argument returns invalid result", what);
+ }
+ } else {
+ wrong_type = "function";
+ }
+ } else {
+ if (is_type_incomplete(type))
+ wrong_type = "incomplete";
+ }
+ if (type->kind == TYPE_BITFIELD)
+ wrong_type = "bitfield";
+
if (wrong_type != NULL) {
char const* const what = kind == EXPR_SIZEOF ? "sizeof" : "alignof";
errorf(&tp_expression->base.source_position,
{
assert(token.type == '.' || token.type == T_MINUSGREATER);
bool select_left_arrow = (token.type == T_MINUSGREATER);
+ source_position_t const pos = *HERE;
next_token();
if (token.type != T_IDENTIFIER) {
bool saw_error = false;
if (is_type_pointer(type)) {
if (!select_left_arrow) {
- errorf(HERE,
+ errorf(&pos,
"request for member '%Y' in something not a struct or union, but '%T'",
symbol, orig_type);
saw_error = true;
type_left = skip_typeref(type->pointer.points_to);
} else {
if (select_left_arrow && is_type_valid(type)) {
- errorf(HERE, "left hand side of '->' is not a pointer, but '%T'", orig_type);
+ errorf(&pos, "left hand side of '->' is not a pointer, but '%T'", orig_type);
saw_error = true;
}
type_left = type;
type_left->kind != TYPE_COMPOUND_UNION) {
if (is_type_valid(type_left) && !saw_error) {
- errorf(HERE,
+ errorf(&pos,
"request for member '%Y' in something not a struct or union, but '%T'",
symbol, type_left);
}
compound_t *compound = type_left->compound.compound;
if (!compound->complete) {
- errorf(HERE, "request for member '%Y' in incomplete type '%T'",
+ errorf(&pos, "request for member '%Y' in incomplete type '%T'",
symbol, type_left);
return create_invalid_expression();
}
type_qualifiers_t qualifiers = type_left->base.qualifiers;
- expression_t *result
- = find_create_select(HERE, addr, qualifiers, compound, symbol);
+ expression_t *result =
+ find_create_select(&pos, addr, qualifiers, compound, symbol);
if (result == NULL) {
- errorf(HERE, "'%T' has no member named '%Y'", orig_type, symbol);
+ errorf(&pos, "'%T' has no member named '%Y'", orig_type, symbol);
return create_invalid_expression();
}
/* report exact scope in error messages (like "in argument 3") */
char buf[64];
snprintf(buf, sizeof(buf), "call argument %u", pos);
- report_assign_error(error, expected_type, arg_expr, buf,
- &arg_expr->base.source_position);
+ report_assign_error(error, expected_type, arg_expr, buf,
+ &arg_expr->base.source_position);
} else if (warning.traditional || warning.conversion) {
type_t *const promoted_type = get_default_promoted_type(arg_type);
if (!types_compatible(expected_type_skip, promoted_type) &&
/* argument must be constant */
call_argument_t *argument = call->arguments;
- if (! is_constant_expression(argument->expression)) {
+ if (is_constant_expression(argument->expression) == EXPR_CLASS_VARIABLE) {
errorf(&call->base.source_position,
"argument of '%Y' must be a constant expression",
call->function->reference.entity->base.symbol);
break;
call_argument_t *arg = call->arguments->next;
- if (arg != NULL && ! is_constant_expression(arg->expression)) {
+ if (arg != NULL && is_constant_expression(arg->expression) == EXPR_CLASS_VARIABLE) {
errorf(&call->base.source_position,
"second argument of '%Y' must be a constant expression",
call->function->reference.entity->base.symbol);
call_argument_t *locality = NULL;
if (rw != NULL) {
- if (! is_constant_expression(rw->expression)) {
+ if (is_constant_expression(rw->expression) == EXPR_CLASS_VARIABLE) {
errorf(&call->base.source_position,
"second argument of '%Y' must be a constant expression",
call->function->reference.entity->base.symbol);
locality = rw->next;
}
if (locality != NULL) {
- if (! is_constant_expression(locality->expression)) {
+ if (is_constant_expression(locality->expression) == EXPR_CLASS_VARIABLE) {
errorf(&call->base.source_position,
"third argument of '%Y' must be a constant expression",
call->function->reference.entity->base.symbol);
if (entity->declaration.storage_class == STORAGE_CLASS_REGISTER
&& !may_be_register) {
errorf(&expression->base.source_position,
- "address of register %s '%Y' requested",
- get_entity_kind_name(entity->kind), entity->base.symbol);
+ "address of register %s '%Y' requested",
+ get_entity_kind_name(entity->kind), entity->base.symbol);
}
if (entity->kind == ENTITY_VARIABLE) {
expression->base.type = arithmetic_type;
}
+static void semantic_binexpr_integer(binary_expression_t *const expression)
+{
+ expression_t *const left = expression->left;
+ expression_t *const right = expression->right;
+ type_t *const orig_type_left = left->base.type;
+ type_t *const orig_type_right = right->base.type;
+ type_t *const type_left = skip_typeref(orig_type_left);
+ type_t *const type_right = skip_typeref(orig_type_right);
+
+ if (!is_type_integer(type_left) || !is_type_integer(type_right)) {
+ /* TODO: improve error message */
+ if (is_type_valid(type_left) && is_type_valid(type_right)) {
+ errorf(&expression->base.source_position,
+ "operation needs integer types");
+ }
+ return;
+ }
+
+ type_t *const result_type = semantic_arithmetic(type_left, type_right);
+ expression->left = create_implicit_cast(left, result_type);
+ expression->right = create_implicit_cast(right, result_type);
+ expression->base.type = result_type;
+}
+
static void warn_div_by_zero(binary_expression_t const *const expression)
{
if (!warning.div_by_zero ||
expression_t const *const right = expression->right;
/* The type of the right operand can be different for /= */
- if (is_type_integer(right->base.type) &&
- is_constant_expression(right) &&
+ if (is_type_integer(right->base.type) &&
+ is_constant_expression(right) == EXPR_CLASS_CONSTANT &&
!fold_constant_to_bool(right)) {
warningf(&expression->base.source_position, "division by zero");
}
type_left = promote_integer(type_left);
- if (is_constant_expression(right)) {
+ if (is_constant_expression(right) == EXPR_CLASS_CONSTANT) {
long count = fold_constant_to_int(right);
if (count < 0) {
warningf(&right->base.source_position,
static bool maybe_negative(expression_t const *const expr)
{
- return
- !is_constant_expression(expr) ||
- fold_constant_to_int(expr) < 0;
+ switch (is_constant_expression(expr)) {
+ case EXPR_CLASS_ERROR: return false;
+ case EXPR_CLASS_CONSTANT: return fold_constant_to_int(expr) < 0;
+ default: return true;
+ }
}
/**
CREATE_BINEXPR_PARSER(T_GREATEREQUAL, EXPR_BINARY_GREATEREQUAL, PREC_SHIFT, semantic_comparison)
CREATE_BINEXPR_PARSER(T_EXCLAMATIONMARKEQUAL, EXPR_BINARY_NOTEQUAL, PREC_RELATIONAL, semantic_comparison)
CREATE_BINEXPR_PARSER(T_EQUALEQUAL, EXPR_BINARY_EQUAL, PREC_RELATIONAL, semantic_comparison)
-CREATE_BINEXPR_PARSER('&', EXPR_BINARY_BITWISE_AND, PREC_EQUALITY, semantic_binexpr_arithmetic)
-CREATE_BINEXPR_PARSER('^', EXPR_BINARY_BITWISE_XOR, PREC_AND, semantic_binexpr_arithmetic)
-CREATE_BINEXPR_PARSER('|', EXPR_BINARY_BITWISE_OR, PREC_XOR, semantic_binexpr_arithmetic)
+CREATE_BINEXPR_PARSER('&', EXPR_BINARY_BITWISE_AND, PREC_EQUALITY, semantic_binexpr_integer)
+CREATE_BINEXPR_PARSER('^', EXPR_BINARY_BITWISE_XOR, PREC_AND, semantic_binexpr_integer)
+CREATE_BINEXPR_PARSER('|', EXPR_BINARY_BITWISE_OR, PREC_XOR, semantic_binexpr_integer)
CREATE_BINEXPR_PARSER(T_ANDAND, EXPR_BINARY_LOGICAL_AND, PREC_OR, semantic_logical_op)
CREATE_BINEXPR_PARSER(T_PIPEPIPE, EXPR_BINARY_LOGICAL_OR, PREC_LOGICAL_AND, semantic_logical_op)
CREATE_BINEXPR_PARSER('=', EXPR_BINARY_ASSIGN, PREC_ASSIGNMENT, semantic_binexpr_assign)
* @param precedence the precedence of the operator
*/
static void register_infix_parser(parse_expression_infix_function parser,
- int token_type, precedence_t precedence)
+ int token_type, precedence_t precedence)
{
expression_parser_function_t *entry = &expression_parsers[token_type];
return create_invalid_statement();
}
+static statement_t *parse_label_inner_statement(statement_t const *const label, char const *const label_kind)
+{
+ statement_t *inner_stmt;
+ switch (token.type) {
+ case '}':
+ errorf(&label->base.source_position, "%s at end of compound statement", label_kind);
+ inner_stmt = create_invalid_statement();
+ break;
+
+ case ';':
+ if (label->kind == STATEMENT_LABEL) {
+ /* Eat an empty statement here, to avoid the warning about an empty
+ * statement after a label. label:; is commonly used to have a label
+ * before a closing brace. */
+ inner_stmt = create_empty_statement();
+ next_token();
+ break;
+ }
+ /* FALLTHROUGH */
+
+ default:
+ inner_stmt = parse_statement();
+ /* ISO/IEC 14882:1998(E) §6:1/§6.7 Declarations are statements */
+ if (inner_stmt->kind == STATEMENT_DECLARATION && !(c_mode & _CXX)) {
+ errorf(&inner_stmt->base.source_position, "declaration after %s", label_kind);
+ }
+ break;
+ }
+ return inner_stmt;
+}
+
/**
* Parse a case statement.
*/
expression_t *const expression = parse_expression();
statement->case_label.expression = expression;
- if (!is_constant_expression(expression)) {
- /* This check does not prevent the error message in all cases of an
- * prior error while parsing the expression. At least it catches the
- * common case of a mistyped enum entry. */
- if (is_type_valid(skip_typeref(expression->base.type))) {
+ expression_classification_t const expr_class = is_constant_expression(expression);
+ if (expr_class != EXPR_CLASS_CONSTANT) {
+ if (expr_class != EXPR_CLASS_ERROR) {
errorf(pos, "case label does not reduce to an integer constant");
}
statement->case_label.is_bad = true;
if (next_if(T_DOTDOTDOT)) {
expression_t *const end_range = parse_expression();
statement->case_label.end_range = end_range;
- if (!is_constant_expression(end_range)) {
- /* This check does not prevent the error message in all cases of an
- * prior error while parsing the expression. At least it catches the
- * common case of a mistyped enum entry. */
- if (is_type_valid(skip_typeref(end_range->base.type))) {
+ expression_classification_t const end_class = is_constant_expression(end_range);
+ if (end_class != EXPR_CLASS_CONSTANT) {
+ if (end_class != EXPR_CLASS_ERROR) {
errorf(pos, "case range does not reduce to an integer constant");
}
statement->case_label.is_bad = true;
errorf(pos, "case label not within a switch statement");
}
- statement_t *const inner_stmt = parse_statement();
- statement->case_label.statement = inner_stmt;
- if (inner_stmt->kind == STATEMENT_DECLARATION) {
- errorf(&inner_stmt->base.source_position, "declaration after case label");
- }
+ statement->case_label.statement = parse_label_inner_statement(statement, "case label");
POP_PARENT;
return statement;
"'default' label not within a switch statement");
}
- statement_t *const inner_stmt = parse_statement();
- statement->case_label.statement = inner_stmt;
- if (inner_stmt->kind == STATEMENT_DECLARATION) {
- errorf(&inner_stmt->base.source_position, "declaration after default label");
- }
+ statement->case_label.statement = parse_label_inner_statement(statement, "default label");
POP_PARENT;
return statement;
eat(':');
- if (token.type == '}') {
- errorf(HERE, "label at end of compound statement");
- statement->label.statement = create_invalid_statement();
- } else if (token.type == ';') {
- /* Eat an empty statement here, to avoid the warning about an empty
- * statement after a label. label:; is commonly used to have a label
- * before a closing brace. */
- statement->label.statement = create_empty_statement();
- next_token();
- } else {
- statement_t *const inner_stmt = parse_statement();
- statement->label.statement = inner_stmt;
- if (inner_stmt->kind == STATEMENT_DECLARATION) {
- errorf(&inner_stmt->base.source_position, "declaration after label");
- }
- }
+ statement->label.statement = parse_label_inner_statement(statement, "label");
/* remember the labels in a list for later checking */
*label_anchor = &statement->label;
else
parse_error_expected("while parsing goto", T_IDENTIFIER, NULL);
eat_until_anchor();
- goto end_error;
+ return create_invalid_statement();
}
/* remember the goto's in a list for later checking */
expect(';', end_error);
- return statement;
end_error:
- return create_invalid_statement();
+ return statement;
}
/**
}
} else {
assign_error_t error = semantic_assign(return_type, return_value);
- report_assign_error(error, return_type, return_value, "'return'",
- pos);
+ report_assign_error(error, return_type, return_value, "'return'",
+ pos);
}
return_value = create_implicit_cast(return_value, return_type);
/* check for returning address of a local var */
if (warning.other && return_value != NULL
- && return_value->base.kind == EXPR_UNARY_TAKE_ADDRESS) {
+ && return_value->base.kind == EXPR_UNARY_TAKE_ADDRESS) {
const expression_t *expression = return_value->unary.value;
if (expression_is_local_variable(expression)) {
warningf(pos, "function returns address of local variable");
/* ISO/IEC 14882:1998(E) §6.6.3:3 */
if (c_mode & _CXX || strict_mode) {
errorf(pos,
- "'return' without value, in function returning non-void");
+ "'return' without value, in function returning non-void");
} else {
warningf(pos,
- "'return' without value, in function returning non-void");
+ "'return' without value, in function returning non-void");
}
}
statement->returns.value = return_value;
eat(T___label__);
- entity_t *begin = NULL, *end = NULL;
-
+ entity_t *begin = NULL;
+ entity_t *end = NULL;
+ entity_t **anchor = &begin;
do {
if (token.type != T_IDENTIFIER) {
parse_error_expected("while parsing local label declaration",
entity->base.source_position = token.source_position;
entity->base.symbol = symbol;
- if (end != NULL)
- end->base.next = entity;
- end = entity;
- if (begin == NULL)
- begin = entity;
+ *anchor = entity;
+ anchor = &entity->base.next;
+ end = entity;
environment_push(entity);
}
next_token();
} while (next_if(','));
- eat(';');
+ expect(';', end_error);
end_error:
statement->declaration.declarations_begin = begin;
statement->declaration.declarations_end = end;
if (entity != NULL
&& entity->kind != ENTITY_NAMESPACE
&& entity->base.parent_scope == current_scope) {
- if (!is_error_entity(entity)) {
+ if (is_entity_valid(entity)) {
error_redefined_as_different_kind(&token.source_position,
entity, ENTITY_NAMESPACE);
}
switch (la1_type) {
case '&':
case '*':
- if (get_entity(token.symbol, NAMESPACE_NORMAL) != NULL)
- goto expression_statment;
- /* FALLTHROUGH */
-
+ if (get_entity(token.symbol, NAMESPACE_NORMAL) != NULL) {
+ default:
+ statement = parse_expression_statement();
+ } else {
DECLARATION_START
case T_IDENTIFIER:
- statement = parse_declaration_statement();
- break;
-
- default:
-expression_statment:
- statement = parse_expression_statement();
+ statement = parse_declaration_statement();
+ }
break;
}
}
static void parse_linkage_specification(void)
{
eat(T_extern);
- assert(token.type == T_STRING_LITERAL);
const char *linkage = parse_string_literals().begin;
add_anchor_token(T_EOF);
#ifndef NDEBUG
+ /* make a copy of the anchor set, so we can check if it is restored after parsing */
unsigned char token_anchor_copy[T_LAST_TOKEN];
memcpy(token_anchor_copy, token_anchor_set, sizeof(token_anchor_copy));
#endif
while (token.type != T_EOF && token.type != '}') {
#ifndef NDEBUG
bool anchor_leak = false;
- for (int i = 0; i != T_LAST_TOKEN; ++i) {
+ for (int i = 0; i < T_LAST_TOKEN; ++i) {
unsigned char count = token_anchor_set[i] - token_anchor_copy[i];
if (count != 0) {
+ /* the anchor set and its copy differs */
errorf(HERE, "Leaked anchor token %k %d times", i, count);
anchor_leak = true;
}
}
if (in_gcc_extension) {
+ /* an gcc extension scope was not closed */
errorf(HERE, "Leaked __extension__");
anchor_leak = true;
}
init_expression_parsers();
obstack_init(&temp_obst);
-
- symbol_t *const va_list_sym = symbol_table_insert("__builtin_va_list");
- type_valist = create_builtin_type(va_list_sym, type_void_ptr);
}
/**
projects / cparser / blobdiff