Implement __bool__ and __len__ via unary_op virtual method for all types.
__bool__() and __len__() are just the same as __neg__() or __invert__(),
and require efficient dispatching implementation (not requiring search/lookup).
type->unary_op() is just the right choice for this short of adding
standalone virtual method(s) to already big mp_obj_type_t structure.
diff --git a/py/objint_longlong.c b/py/objint_longlong.c
index 38a0183..a59bcf0 100644
--- a/py/objint_longlong.c
+++ b/py/objint_longlong.c
@@ -35,7 +35,7 @@
mp_obj_t int_unary_op(int op, mp_obj_t o_in) {
mp_obj_int_t *o = o_in;
switch (op) {
- case RT_UNARY_OP_NOT: return MP_BOOL(o->val != 0); // TODO: implements RT_UNARY_OP_BOOL
+ case RT_UNARY_OP_BOOL: return MP_BOOL(o->val != 0);
case RT_UNARY_OP_POSITIVE: return o_in;
case RT_UNARY_OP_NEGATIVE: return mp_obj_new_int_from_ll(-o->val);
case RT_UNARY_OP_INVERT: return mp_obj_new_int_from_ll(~o->val);