sharding: make ShardingError pub(crate)

This error type is used only internally. The `ShardInfo` struct is
pub(crate) as well.

Author: muzarski

scylla/src/routing/mod.rs

@@ -13,8 +13,8 @@ pub mod locator;
 pub mod partitioner;
 mod sharding;
 
-pub(crate) use sharding::ShardInfo;
-pub use sharding::{Shard, ShardCount, Sharder, ShardingError};
+pub use sharding::{Shard, ShardCount, Sharder};
+pub(crate) use sharding::{ShardInfo, ShardingError};
 
 #[derive(PartialEq, Eq, PartialOrd, Ord, Clone, Copy, Debug)]
 

scylla/src/routing/sharding.rs

@@ -96,7 +96,7 @@ impl Sharder {
 }
 
 #[derive(Clone, Error, Debug)]
-pub enum ShardingError {
+pub(crate) enum ShardingError {
     /// This indicates that we are most likely connected to a Cassandra cluster.
     /// Unless, there is some serious bug in Scylla.
     #[error("Server did not provide any sharding information")]