From 55f4e5a541eda9e7cefbd5138b42cdd92c697d17 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E5=BC=A0=E7=82=8E=E6=B3=BC?= <drdr.xp@gmail.com>
Date: Mon, 22 Jul 2024 11:04:48 +0800
Subject: [PATCH] Chore: mark StorageIOError as deprecated

---
 openraft/src/engine/command.rs                  | 1 -
 openraft/src/engine/handler/vote_handler/mod.rs | 3 ---
 openraft/src/lib.rs                             | 1 +
 openraft/src/storage_error.rs                   | 1 +
 4 files changed, 2 insertions(+), 4 deletions(-)

diff --git a/openraft/src/engine/command.rs b/openraft/src/engine/command.rs
index d14ccfec0..04667f0d9 100644
--- a/openraft/src/engine/command.rs
+++ b/openraft/src/engine/command.rs
@@ -106,7 +106,6 @@ where C: RaftTypeConfig
     /// inclusive.
     TruncateLog { since: LogId<C::NodeId> },
 
-    // TODO(1): current it is only used to replace BuildSnapshot, InstallSnapshot, CancelSnapshot.
     /// A command send to state machine worker [`sm::worker::Worker`].
     ///
     /// The runtime(`RaftCore`) will just forward this command to [`sm::worker::Worker`].
diff --git a/openraft/src/engine/handler/vote_handler/mod.rs b/openraft/src/engine/handler/vote_handler/mod.rs
index 79be4bfb1..b9fc9792a 100644
--- a/openraft/src/engine/handler/vote_handler/mod.rs
+++ b/openraft/src/engine/handler/vote_handler/mod.rs
@@ -235,9 +235,6 @@ where C: RaftTypeConfig
     ///
     /// This node then becomes raft-follower or raft-learner.
     pub(crate) fn become_following(&mut self) {
-        // TODO: entering following needs to check last-log-id on other node to decide the election
-        // timeout.
-
         debug_assert!(
             self.state.vote_ref().leader_id().voted_for() != Some(self.config.id)
                 || !self.state.membership_state.effective().membership().is_voter(&self.config.id),
diff --git a/openraft/src/lib.rs b/openraft/src/lib.rs
index af46ce624..4ebc42958 100644
--- a/openraft/src/lib.rs
+++ b/openraft/src/lib.rs
@@ -113,6 +113,7 @@ pub use crate::storage::StorageHelper;
 pub use crate::storage_error::ErrorSubject;
 pub use crate::storage_error::ErrorVerb;
 pub use crate::storage_error::StorageError;
+#[allow(deprecated)]
 pub use crate::storage_error::StorageIOError;
 pub use crate::storage_error::ToStorageResult;
 pub use crate::summary::MessageSummary;
diff --git a/openraft/src/storage_error.rs b/openraft/src/storage_error.rs
index 375b04ece..4814dc173 100644
--- a/openraft/src/storage_error.rs
+++ b/openraft/src/storage_error.rs
@@ -84,6 +84,7 @@ impl fmt::Display for ErrorVerb {
 }
 
 /// Backward compatible with old application using `StorageIOError`
+#[deprecated(note = "use StorageError instead", since = "0.10.0")]
 pub type StorageIOError<C> = StorageError<C>;
 
 impl<C> StorageError<C>