allow any writer, not only mutable references to writers

Author: antonilol

Diff for: heed-traits/src/lib.rs

@@ -55,7 +55,7 @@ pub trait BytesEncode<'a> {
     /// The default implementation forwards to [`bytes_encode`][BytesEncode::bytes_encode].
     fn bytes_encode_into_writer<W: io::Write>(
         item: &'a Self::EItem,
-        writer: &mut W,
+        mut writer: W,
     ) -> Result<(), BoxedError> {
         let bytes = Self::bytes_encode(item)?;
 

Diff for: heed-types/src/serde_bincode.rs

@@ -26,7 +26,7 @@ where
 
     fn bytes_encode_into_writer<W: std::io::Write>(
         item: &'a Self::EItem,
-        writer: &mut W,
+        writer: W,
     ) -> Result<(), BoxedError> {
         bincode::serialize_into(writer, item)?;
         Ok(())

Diff for: heed-types/src/serde_json.rs

@@ -26,7 +26,7 @@ where
 
     fn bytes_encode_into_writer<W: std::io::Write>(
         item: &'a Self::EItem,
-        writer: &mut W,
+        writer: W,
     ) -> Result<(), BoxedError> {
         serde_json::to_writer(writer, item)?;
         Ok(())

Diff for: heed-types/src/serde_rmp.rs

@@ -26,9 +26,9 @@ where
 
     fn bytes_encode_into_writer<W: std::io::Write>(
         item: &'a Self::EItem,
-        writer: &mut W,
+        mut writer: W,
     ) -> Result<(), BoxedError> {
-        rmp_serde::encode::write(writer, item)?;
+        rmp_serde::encode::write(&mut writer, item)?;
         Ok(())
     }
 }