db: supply table as Type not as fn param (#32)

crates/db/src/kv/mod.rs

@@ -175,12 +175,12 @@ mod tests {
 
         // PUT
         let tx = env.begin_mut_tx().expect(ERROR_INIT_TX);
-        tx.put(PlainState, key, value.clone()).expect(ERROR_PUT);
+        tx.put::<PlainState>(key, value.clone()).expect(ERROR_PUT);
         tx.commit().expect(ERROR_COMMIT);
 
         // GET
         let tx = env.begin_tx().expect(ERROR_INIT_TX);
-        let result = tx.get(PlainState, key).expect(ERROR_GET);
+        let result = tx.get::<PlainState>(key).expect(ERROR_GET);
         assert!(result.expect(ERROR_RETURN_VALUE) == value);
         tx.commit().expect(ERROR_COMMIT);
     }
@@ -199,7 +199,7 @@ mod tests {
 
             // PUT
             let result = env.update(|tx| {
-                tx.put(PlainState, key, value.clone()).expect(ERROR_PUT);
+                tx.put::<PlainState>(key, value.clone()).expect(ERROR_PUT);
                 200
             });
             assert!(result.expect(ERROR_RETURN_VALUE) == 200);
@@ -208,7 +208,7 @@ mod tests {
         let env = Env::<WriteMap>::open(&path, EnvKind::RO).expect(ERROR_DB_CREATION);
 
         // GET
-        let result = env.view(|tx| tx.get(PlainState, key).expect(ERROR_GET)).expect(ERROR_GET);
+        let result = env.view(|tx| tx.get::<PlainState>(key).expect(ERROR_GET)).expect(ERROR_GET);
 
         assert!(result == Some(value))
     }

crates/db/src/kv/table.rs

@@ -27,15 +27,14 @@ impl<T> Object for T where T: Encode + Decode {}
 
 /// Generic trait that a database table should follow.
 pub trait Table: Send + Sync + Debug + 'static {
+    /// Return table name as it is present inside the MDBX.
+    const NAME: &'static str;
     /// Key element of `Table`.
     type Key: Encode;
     /// Value element of `Table`.
     type Value: Object;
     /// Seek Key element of `Table`.
     type SeekKey: Encode;
-
-    /// Return name as it is present inside the MDBX.
-    fn name(&self) -> &'static str;
 }
 
 /// DupSort allows for keys not to be repeated in the database,

crates/db/src/kv/tables.rs

@@ -33,14 +33,11 @@ macro_rules! table {
         pub struct $name;
 
         impl $crate::kv::table::Table for $name {
+            const NAME: &'static str = $name::const_name();
             type Key = $key;
             type Value = $value;
             type SeekKey = $seek;
 
-            /// Return $name as it is present inside the database.
-            fn name(&self) -> &'static str {
-                $name::const_name()
-            }
         }
 
         impl $name {

crates/db/src/kv/tx.rs

@@ -33,25 +33,23 @@ impl<'env, K: TransactionKind, E: EnvironmentKind> Tx<'env, K, E> {
     }
 
     /// Open cursor on `table`.
-    pub fn cursor<'a, T: Table>(&'a self, table: T) -> Result<Cursor<'a, K, T>, KVError>
+    pub fn cursor<'a, T: Table>(&'a self) -> Result<Cursor<'a, K, T>, KVError>
     where
         'env: 'a,
         T: Table,
     {
-        let table_name = table.name();
-
         Ok(Cursor {
-            inner: self.inner.cursor(&self.inner.open_db(Some(table_name))?)?,
-            table: table_name,
+            inner: self.inner.cursor(&self.inner.open_db(Some(T::NAME))?)?,
+            table: T::NAME,
             _dbi: PhantomData,
         })
     }
 
     /// Gets value associated with `key` on `table`. If it's a DUPSORT table, then returns the first
     /// entry.
-    pub fn get<T: Table>(&self, table: T, key: T::Key) -> ValueOnlyResult<T> {
+    pub fn get<T: Table>(&self, key: T::Key) -> ValueOnlyResult<T> {
         self.inner
-            .get(&self.inner.open_db(Some(table.name()))?, key.encode().as_ref())?
+            .get(&self.inner.open_db(Some(T::NAME))?, key.encode().as_ref())?
             .map(decode_one::<T>)
             .transpose()
     }
@@ -65,23 +63,18 @@ impl<'env, K: TransactionKind, E: EnvironmentKind> Tx<'env, K, E> {
 impl<'a, E: EnvironmentKind> Tx<'a, RW, E> {
     /// Opens `table` and inserts `(key, value)` pair. If the `key` already exists, it replaces the
     /// value it if the table doesn't support DUPSORT.
-    pub fn put<T>(&self, table: T, k: T::Key, v: T::Value) -> Result<(), KVError>
+    pub fn put<T>(&self, k: T::Key, v: T::Value) -> Result<(), KVError>
     where
         T: Table,
     {
         self.inner
-            .put(
-                &self.inner.open_db(Some(table.name()))?,
-                &k.encode(),
-                &v.encode(),
-                WriteFlags::UPSERT,
-            )
+            .put(&self.inner.open_db(Some(T::NAME))?, &k.encode(), &v.encode(), WriteFlags::UPSERT)
             .map_err(KVError::Put)
     }
 
     /// Deletes the `(key, value)` entry on `table`. When `value` is `None`, all entries with `key`
     /// are to be deleted. Otherwise, only the item matching that data shall be.
-    pub fn delete<T>(&self, table: T, key: T::Key, value: Option<T::Value>) -> Result<bool, KVError>
+    pub fn delete<T>(&self, key: T::Key, value: Option<T::Value>) -> Result<bool, KVError>
     where
         T: Table,
     {
@@ -93,16 +86,16 @@ impl<'a, E: EnvironmentKind> Tx<'a, RW, E> {
         };
 
         self.inner
-            .del(&self.inner.open_db(Some(table.name()))?, key.encode(), data)
+            .del(&self.inner.open_db(Some(T::NAME))?, key.encode(), data)
             .map_err(KVError::Delete)
     }
 
     /// Empties `table`.
-    pub fn clear<T>(&self, table: T) -> Result<(), KVError>
+    pub fn clear<T>(&self) -> Result<(), KVError>
     where
         T: Table,
     {
-        self.inner.clear_db(&self.inner.open_db(Some(table.name()))?)?;
+        self.inner.clear_db(&self.inner.open_db(Some(T::NAME))?)?;
 
         Ok(())
     }