Cache more queries on disk.

2 files changed, 9 insertions, 16 deletions

diff --git a/compiler/rustc_serialize/src/collection_impls.rs b/compiler/rustc_serialize/src/collection_impls.rs
index dee6dc010fe..761e988360a 100644
--- a/compiler/rustc_serialize/src/collection_impls.rs
+++ b/compiler/rustc_serialize/src/collection_impls.rs
@@ -171,16 +171,6 @@ where
     }
 }
 
-impl<E: Encoder, T, S> Encodable<E> for &HashSet<T, S>
-where
-    T: Encodable<E> + Eq,
-    S: BuildHasher,
-{
-    fn encode(&self, s: &mut E) -> Result<(), E::Error> {
-        (**self).encode(s)
-    }
-}
-
 impl<D: Decoder, T, S> Decodable<D> for HashSet<T, S>
 where
     T: Decodable<D> + Hash + Eq,
diff --git a/compiler/rustc_serialize/src/serialize.rs b/compiler/rustc_serialize/src/serialize.rs
index 7d6b8c760ff..36e575b2427 100644
--- a/compiler/rustc_serialize/src/serialize.rs
+++ b/compiler/rustc_serialize/src/serialize.rs
@@ -268,6 +268,15 @@ direct_serialize_impls! {
     char emit_char read_char
 }
 
+impl<S: Encoder, T: ?Sized> Encodable<S> for &T
+where
+    T: Encodable<S>,
+{
+    fn encode(&self, s: &mut S) -> Result<(), S::Error> {
+        (**self).encode(s)
+    }
+}
+
 impl<S: Encoder> Encodable<S> for ! {
     fn encode(&self, _s: &mut S) -> Result<(), S::Error> {
         unreachable!()
@@ -298,12 +307,6 @@ impl<S: Encoder> Encodable<S> for str {
     }
 }
 
-impl<S: Encoder> Encodable<S> for &str {
-    fn encode(&self, s: &mut S) -> Result<(), S::Error> {
-        s.emit_str(self)
-    }
-}
-
 impl<S: Encoder> Encodable<S> for String {
     fn encode(&self, s: &mut S) -> Result<(), S::Error> {
         s.emit_str(&self[..])