implement Default and Clone manually

Author: newpavlov

block-buffer/src/lib.rs

@@ -42,7 +42,7 @@ pub type EagerBuffer<B> = BlockBuffer<B, Eager>;
 pub type LazyBuffer<B> = BlockBuffer<B, Lazy>;
 
 /// Buffer for block processing of data.
-#[derive(Default, Clone, Debug)]
+#[derive(Debug)]
 pub struct BlockBuffer<BlockSize, Kind>
 where
     BlockSize: ArrayLength<u8> + IsLess<U256>,
@@ -54,6 +54,36 @@ where
     _pd: PhantomData<Kind>,
 }
 
+impl<BlockSize, Kind> Default for BlockBuffer<BlockSize, Kind>
+where
+    BlockSize: ArrayLength<u8> + IsLess<U256>,
+    Le<BlockSize, U256>: NonZero,
+    Kind: BufferKind,
+{
+    fn default() -> Self {
+        Self {
+            buffer: Default::default(),
+            pos: 0,
+            _pd: PhantomData,
+        }
+    }
+}
+
+impl<BlockSize, Kind> Clone for BlockBuffer<BlockSize, Kind>
+where
+    BlockSize: ArrayLength<u8> + IsLess<U256>,
+    Le<BlockSize, U256>: NonZero,
+    Kind: BufferKind,
+{
+    fn clone(&self) -> Self {
+        Self {
+            buffer: self.buffer.clone(),
+            pos: self.pos.clone(),
+            _pd: PhantomData,
+        }
+    }
+}
+
 impl<BlockSize, Kind> BlockBuffer<BlockSize, Kind>
 where
     BlockSize: ArrayLength<u8> + IsLess<U256>,