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/obj.c b/py/obj.c
index 1d0c80a..4534ef1 100644
--- a/py/obj.c
+++ b/py/obj.c
@@ -481,6 +481,11 @@
}
MP_DEFINE_CONST_FUN_OBJ_1(mp_identity_obj, mp_identity);
+mp_obj_t mp_identity_getiter(mp_obj_t self, mp_obj_iter_buf_t *iter_buf) {
+ (void)iter_buf;
+ return self;
+}
+
bool mp_get_buffer(mp_obj_t obj, mp_buffer_info_t *bufinfo, mp_uint_t flags) {
mp_obj_type_t *type = mp_obj_get_type(obj);
if (type->buffer_p.get_buffer == NULL) {