py: Add iter_buf to getiter type method.
Allows to iterate over the following without allocating on the heap:
- tuple
- list
- string, bytes
- bytearray, array
- dict (not dict.keys, dict.values, dict.items)
- set, frozenset
Allows to call the following without heap memory:
- all, any, min, max, sum
TODO: still need to allocate stack memory in bytecode for iter_buf.
diff --git a/py/objreversed.c b/py/objreversed.c
index 4343c19..fc85e72 100644
--- a/py/objreversed.c
+++ b/py/objreversed.c
@@ -74,7 +74,7 @@
{ &mp_type_type },
.name = MP_QSTR_reversed,
.make_new = reversed_make_new,
- .getiter = mp_identity,
+ .getiter = mp_identity_getiter,
.iternext = reversed_iternext,
};