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py/obj: Add "full" and "empty" non-variable-length mp_obj_type_t.

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This will always have the maximum/minimum size of a mp_obj_type_t
representation and can be used as a member in other structs.

Signed-off-by: Jim Mussared <jim.mussared@gmail.com>
This commit is contained in:
Jim Mussared
2022-04-22 13:05:56 +10:00
committed by Damien George
parent 5ddf671944
commit e8355eb163
15 changed files with 40 additions and 21 deletions
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2
extmod/modbtree.c
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@@ -67,7 +67,7 @@ void __dbpanic(DB *db) {
}
STATIC mp_obj_btree_t *btree_new(DB *db, mp_obj_t stream) {
mp_obj_btree_t *o = mp_obj_malloc(mp_obj_btree_t, &btree_type);
mp_obj_btree_t *o = mp_obj_malloc(mp_obj_btree_t, (mp_obj_type_t *)&btree_type);
o->stream = stream;
o->db = db;
o->start_key = mp_const_none;