Init single-bucket feature

sewup/Cargo.toml

@@ -40,6 +40,7 @@ token = [ ]
 kv = []
 rdb = []
 debug = []
+single-bucket = []
 
 [package.metadata.docs.rs]
 all-features = true

sewup/src/kv/store.rs

@@ -26,6 +26,9 @@ type Tenants = HashMap<String, Option<RawBucket>>;
 /// Besides, there may be more than one bucket in store, such that you can
 /// easily save different kind of key/value pair in the chain.
 ///
+/// If you want to take all storage as a key value without bucket, you may checkout
+/// the `single-bucket` feature.
+///
 /// ### Store Header
 /// The fist 32 bytes are reserved as header of the store,
 ///

sewup/src/lib.rs

@@ -21,12 +21,18 @@ pub mod token;
 #[cfg(feature = "token")]
 pub use token::*;
 
-/// help you storage thing as key value object pair
+/// help you storage thing as key value object pair with multiple bucket
 #[cfg(feature = "kv")]
 pub mod kv;
 #[cfg(feature = "kv")]
 pub use kv::*;
 
+/// help you storage thing as key value object pair
+#[cfg(feature = "single-bucket")]
+pub mod single_bucket;
+#[cfg(feature = "single-bucket")]
+pub use single_bucket::*;
+
 /// help you storage thing as records in tables
 #[cfg(feature = "rdb")]
 pub mod rdb;

sewup/src/single_bucket/mod.rs

@@ -0,0 +1,15 @@
+use std::iter::Iterator;
+use std::marker::PhantomData;
+
+pub struct Item<K, V> {
+    phantom_k: PhantomData<K>,
+    phantom_v: PhantomData<V>,
+}
+
+pub enum Pair<K, V> {
+    Item1(Item<K, V>),
+}
+
+pub trait SingleBucket<K1, V1> {
+    type Pairs: Iterator<Item = Pair<K1, V1>>;
+}