From ad304915a855bc45481d3c1e6213b0c816d448b6 Mon Sep 17 00:00:00 2001
From: mxsm <mxsm@apache.org>
Date: Sat, 16 Nov 2024 23:52:47 +0800
Subject: [PATCH] =?UTF-8?q?[ISSUE=20#55]=F0=9F=8E=A8Fix=20CheetahString=20?=
 =?UTF-8?q?Serialize=20empty=20make=20Deserialize=20error=F0=9F=9A=80?=
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---
 src/cheetah_string.rs | 8 +++++++-
 src/serde.rs          | 4 ++--
 2 files changed, 9 insertions(+), 3 deletions(-)

diff --git a/src/cheetah_string.rs b/src/cheetah_string.rs
index c440f8e..36c3d98 100644
--- a/src/cheetah_string.rs
+++ b/src/cheetah_string.rs
@@ -7,7 +7,7 @@ use std::ops::Deref;
 use std::str::FromStr;
 use std::sync::Arc;
 
-const EMPTY_STRING: &str = "";
+pub const EMPTY_STRING: &str = "";
 
 #[derive(Clone)]
 #[repr(transparent)]
@@ -195,6 +195,12 @@ impl AsRef<[u8]> for CheetahString {
     }
 }
 
+impl AsRef<CheetahString> for CheetahString {
+    fn as_ref(&self) -> &CheetahString {
+        self
+    }
+}
+
 impl From<&String> for CheetahString {
     fn from(s: &String) -> Self {
         CheetahString::from_slice(s)
diff --git a/src/serde.rs b/src/serde.rs
index f0c4a78..010a221 100644
--- a/src/serde.rs
+++ b/src/serde.rs
@@ -1,4 +1,4 @@
-use crate::cheetah_string::InnerString;
+use crate::cheetah_string::{InnerString, EMPTY_STRING};
 use crate::CheetahString;
 use serde::de::{Error, Unexpected, Visitor};
 use serde::{Deserialize, Deserializer, Serialize, Serializer};
@@ -14,7 +14,7 @@ impl Serialize for CheetahString {
             InnerString::ArcVecString(s) => serializer.serialize_bytes(s),
             #[cfg(feature = "bytes")]
             InnerString::Bytes(bytes) => serializer.serialize_bytes(bytes.as_ref()),
-            InnerString::Empty => serializer.serialize_bytes(&[]),
+            InnerString::Empty => serializer.serialize_str(EMPTY_STRING),
         }
     }
 }