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objtype: Implement ->getiter() method for instances. 

Includes support for native bases.
This commit is contained in:
Paul Sokolovsky 2014-05-10 21:09:18 +03:00
parent 0bc15941c2
commit 1a7403bb74
2 changed files with 41 additions and 0 deletions
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23
py/objtype.c
View File

@ -501,6 +501,28 @@ STATIC mp_obj_t instance_call(mp_obj_t self_in, uint n_args, uint n_kw, const mp
return mp_call_function_n_kw(meth, n_args, n_kw, args);
}
STATIC mp_obj_t instance_getiter(mp_obj_t self_in) {
mp_obj_instance_t *self = self_in;
mp_obj_t member[2] = {MP_OBJ_NULL};
mp_obj_class_lookup(self, self->base.type, MP_QSTR___iter__, offsetof(mp_obj_type_t, getiter), member);
if (member[0] == MP_OBJ_NULL) {
// This kinda duplicates code in mp_getiter()
mp_obj_class_lookup(self, self->base.type, MP_QSTR___getitem__, 0, member);
if (member[0] != MP_OBJ_NULL) {
// __getitem__ exists, create an iterator
instance_convert_return_attr(self_in, member[0], member);
return mp_obj_new_getitem_iter(member);
}
return MP_OBJ_NULL;
}
if (member[0] == MP_OBJ_SENTINEL) {
mp_obj_type_t *type = mp_obj_get_type(self->subobj[0]);
return type->getiter(self->subobj[0]);
}
mp_obj_t meth = mp_obj_new_bound_meth(member[0], self);
return mp_call_function_n_kw(meth, 0, 0, NULL);
}
/******************************************************************************/
// type object
// - the struct is mp_obj_type_t and is defined in obj.h so const types can be made
@ -655,6 +677,7 @@ mp_obj_t mp_obj_new_type(qstr name, mp_obj_t bases_tuple, mp_obj_t locals_dict)
o->store_attr = instance_store_attr;
o->subscr = instance_subscr;
o->call = instance_call;
o->getiter = instance_getiter;
o->bases_tuple = bases_tuple;
o->locals_dict = locals_dict;

18
tests/basics/subclass_native_specmeth.py Normal file
View File

@ -0,0 +1,18 @@
# Test calling non-special method inherited from native type
class mylist(list):
pass
l = mylist([1, 2, 3])
print(l)
print([e for e in l])
class mylist2(list):
def __iter__(self):
return iter([10, 20, 30])
l = mylist2([1, 2, 3])
print(l)
print([e for e in l])