chore: add trait AsMap to get a handle of MapApi<K> for a specific …

…type `K`

src/meta/raft-store/src/lib.rs

@@ -14,10 +14,9 @@
 
 #![allow(clippy::uninlined_format_args)]
 #![feature(impl_trait_in_assoc_type)]
-// #![feature(type_alias_impl_trait)]
+#![feature(return_position_impl_trait_in_trait)]
 
 // #![allow(incomplete_features)]
-// #![feature(return_position_impl_trait_in_trait)]
 
 pub mod applier;
 pub(crate) mod compat07;

src/meta/raft-store/src/sm_v002/leveled_store/level.rs

@@ -20,6 +20,7 @@ use common_meta_types::KVMeta;
 use futures_util::stream::BoxStream;
 use futures_util::StreamExt;
 
+use crate::sm_v002::leveled_store::map_api::AsMap;
 use crate::sm_v002::leveled_store::map_api::MapApi;
 use crate::sm_v002::leveled_store::map_api::MapApiRO;
 use crate::sm_v002::leveled_store::map_api::MapKey;
@@ -126,7 +127,7 @@ impl MapApi<String> for Level {
             Marked::new_tomb_stone(seq)
         };
 
-        let prev = MapApiRO::<String>::get(&*self, key.as_str()).await;
+        let prev = (*self).str_map().get(&key).await;
         self.kv.insert(key, marked.clone());
         (prev, marked)
     }
@@ -180,7 +181,7 @@ impl MapApi<ExpireKey> for Level {
             Marked::TombStone { internal_seq: seq }
         };
 
-        let prev = MapApiRO::<ExpireKey>::get(&*self, &key).await;
+        let prev = (*self).expire_map().get(&key).await;
         self.expire.insert(key, marked.clone());
         (prev, marked)
     }

src/meta/raft-store/src/sm_v002/leveled_store/leveled_map.rs

@@ -96,6 +96,7 @@ impl LeveledMap {
         RefMut::new(&mut self.writable, &self.frozen)
     }
 
+    #[allow(dead_code)]
     pub(crate) fn to_ref(&self) -> Ref {
         Ref::new(Some(&self.writable), &self.frozen)
     }
@@ -143,7 +144,5 @@ where
     {
         let mut l = self.to_ref_mut();
         MapApi::set(&mut l, key, value).await
-
-        // (&mut l).set(key, value).await
     }
 }