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/runtime.h b/py/runtime.h
index e25f2a4..954833b 100644
--- a/py/runtime.h
+++ b/py/runtime.h
@@ -123,7 +123,7 @@
void mp_load_method_maybe(mp_obj_t base, qstr attr, mp_obj_t *dest);
void mp_store_attr(mp_obj_t base, qstr attr, mp_obj_t val);
-mp_obj_t mp_getiter(mp_obj_t o);
+mp_obj_t mp_getiter(mp_obj_t o, mp_obj_iter_buf_t *iter_buf);
mp_obj_t mp_iternext_allow_raise(mp_obj_t o); // may return MP_OBJ_STOP_ITERATION instead of raising StopIteration()
mp_obj_t mp_iternext(mp_obj_t o); // will always return MP_OBJ_STOP_ITERATION instead of raising StopIteration(...)
mp_vm_return_kind_t mp_resume(mp_obj_t self_in, mp_obj_t send_value, mp_obj_t throw_value, mp_obj_t *ret_val);