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/objtuple.c b/py/objtuple.c
index 754fe4b..5f1744e 100644
--- a/py/objtuple.c
+++ b/py/objtuple.c
@@ -76,7 +76,8 @@
static mp_obj_t tuple_unary_op(int op, mp_obj_t self_in) {
mp_obj_tuple_t *self = self_in;
switch (op) {
- case RT_UNARY_OP_NOT: if (self->len == 0) { return mp_const_true; } else { return mp_const_false; }
+ case RT_UNARY_OP_BOOL: return MP_BOOL(self->len != 0);
+ case RT_UNARY_OP_LEN: return MP_OBJ_NEW_SMALL_INT(self->len);
default: return MP_OBJ_NULL; // op not supported for None
}
}