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objtype: Fix passing of class param to inherited classmethods. 

This is getting more and more tangled, but that's old news.
This commit is contained in:
Paul Sokolovsky 2014-06-08 22:28:44 +03:00
parent 639863d36e
commit 195de3247b
2 changed files with 27 additions and 3 deletions
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18
py/objtype.c
View File

@ -103,6 +103,7 @@ struct class_lookup_data {
qstr attr;
machine_uint_t meth_offset;
mp_obj_t *dest;
bool is_type;
};
STATIC void mp_obj_class_lookup(struct class_lookup_data *lookup, const mp_obj_type_t *type) {
@ -128,18 +129,28 @@ STATIC void mp_obj_class_lookup(struct class_lookup_data *lookup, const mp_obj_
mp_map_elem_t *elem = mp_map_lookup(locals_map, MP_OBJ_NEW_QSTR(lookup->attr), MP_MAP_LOOKUP);
if (elem != NULL) {
lookup->dest[0] = elem->value;
if (lookup->obj != MP_OBJ_NULL && is_native_type(type)) {
if (lookup->is_type) {
// If we look up class method, we need to pass original type there,
// not type where we found a class method.
const mp_obj_type_t *org_type = (const mp_obj_type_t*)lookup->obj;
instance_convert_return_attr(NULL, org_type, elem->value, lookup->dest);
} else if (lookup->obj != MP_OBJ_NULL && !lookup->is_type && is_native_type(type)) {
instance_convert_return_attr(lookup->obj->subobj[0], type, elem->value, lookup->dest);
} else {
instance_convert_return_attr(lookup->obj, type, elem->value, lookup->dest);
}
#if DEBUG_PRINT
printf("mp_obj_class_lookup: Returning: ");
mp_obj_print(lookup->dest[0], PRINT_REPR); printf(" ");
mp_obj_print(lookup->dest[1], PRINT_REPR); printf("\n");
#endif
return;
}
}
// Try this for completeness, but all native methods should be statically defined
// in locals_dict, and would be handled by above.
if (lookup->obj != MP_OBJ_NULL && is_native_type(type)) {
if (lookup->obj != MP_OBJ_NULL && !lookup->is_type && is_native_type(type)) {
mp_load_method_maybe(lookup->obj->subobj[0], lookup->attr, lookup->dest);
if (lookup->dest[0] != MP_OBJ_NULL) {
return;
@ -672,10 +683,11 @@ STATIC void type_load_attr(mp_obj_t self_in, qstr attr, mp_obj_t *dest) {
}
#endif
struct class_lookup_data lookup = {
.obj = NULL,
.obj = self_in,
.attr = attr,
.meth_offset = 0,
.dest = dest,
.is_type = true,
};
mp_obj_class_lookup(&lookup, self);
}

12
tests/basics/subclass_classmethod.py Normal file
View File

@ -0,0 +1,12 @@
# Calling an inherited classmethod
class Base:
@classmethod
def foo(cls):
print(cls.__name__)
class Sub(Base):
pass
Sub.foo()