From a7fba80e23a3778e1fb1850964429c3e5c1438aa Mon Sep 17 00:00:00 2001
From: Trangar <gpg@trangar.com>
Date: Thu, 17 Mar 2022 11:31:22 +0100
Subject: [PATCH] Made the Cow Encode constraints more permissive (#524)

* Made the Cow Encode constraints more permissive

* Made Decode more permissive for Cow
---
 src/features/impl_alloc.rs | 5 +++--
 tests/issues.rs            | 3 +++
 tests/issues/issue_523.rs  | 9 +++++++++
 3 files changed, 15 insertions(+), 2 deletions(-)
 create mode 100644 tests/issues/issue_523.rs

diff --git a/src/features/impl_alloc.rs b/src/features/impl_alloc.rs
index ea97cd6..bef4a60 100644
--- a/src/features/impl_alloc.rs
+++ b/src/features/impl_alloc.rs
@@ -285,7 +285,7 @@ where
 
 impl<'cow, T> Decode for Cow<'cow, T>
 where
-    T: ToOwned,
+    T: ToOwned + ?Sized,
     <T as ToOwned>::Owned: Decode,
 {
     fn decode<D: Decoder>(decoder: &mut D) -> Result<Self, DecodeError> {
@@ -296,7 +296,8 @@ where
 
 impl<'cow, T> Encode for Cow<'cow, T>
 where
-    T: Encode + Clone,
+    T: ToOwned + ?Sized,
+    for<'a> &'a T: Encode,
 {
     fn encode<E: Encoder>(&self, encoder: &mut E) -> Result<(), EncodeError> {
         self.as_ref().encode(encoder)
diff --git a/tests/issues.rs b/tests/issues.rs
index b930abd..5b32511 100644
--- a/tests/issues.rs
+++ b/tests/issues.rs
@@ -20,3 +20,6 @@ mod issue_498;
 
 #[path = "issues/issue_500.rs"]
 mod issue_500;
+
+#[path = "issues/issue_523.rs"]
+mod issue_523;
diff --git a/tests/issues/issue_523.rs b/tests/issues/issue_523.rs
new file mode 100644
index 0000000..2cda3f9
--- /dev/null
+++ b/tests/issues/issue_523.rs
@@ -0,0 +1,9 @@
+#![cfg(all(feature = "derive", feature = "std"))]
+
+extern crate std;
+
+use bincode::{Decode, Encode};
+use std::borrow::Cow;
+
+#[derive(Clone, Encode, Decode)]
+pub struct Foo<'a>(Cow<'a, str>);