HashStable in libsyntax.

src/librustc/ich/impls_hir.rs

@@ -220,11 +220,6 @@ impl<'a> HashStable<StableHashingContext<'a>> for hir::ImplItem {
     }
 }
 
-impl_stable_hash_for!(enum ast::CrateSugar {
-    JustCrate,
-    PubCrate,
-});
-
 impl<'a> HashStable<StableHashingContext<'a>> for hir::VisibilityKind {
     fn hash_stable(&self, hcx: &mut StableHashingContext<'a>, hasher: &mut StableHasher) {
         mem::discriminant(self).hash_stable(hcx, hasher);

src/librustc/ich/impls_ty.rs

@@ -159,11 +159,6 @@ where
     }
 }
 
-impl_stable_hash_for!(enum ::syntax::ast::Mutability {
-    Immutable,
-    Mutable
-});
-
 impl<'a> ToStableHashKey<StableHashingContext<'a>> for region::Scope {
     type KeyType = region::Scope;
 

src/libsyntax/ast.rs

@@ -722,9 +722,8 @@ pub enum PatKind {
     Mac(Mac),
 }
 
-#[derive(
+#[derive(Clone, PartialEq, Eq, PartialOrd, Ord, Hash,
-    Clone, PartialEq, Eq, PartialOrd, Ord, Hash, RustcEncodable, RustcDecodable, Debug, Copy,
+         RustcEncodable, RustcDecodable, Debug, Copy, HashStable_Generic)]
-)]
 pub enum Mutability {
     Mutable,
     Immutable,
@@ -2334,7 +2333,7 @@ impl PolyTraitRef {
     }
 }
 
-#[derive(Copy, Clone, RustcEncodable, RustcDecodable, Debug)]
+#[derive(Copy, Clone, RustcEncodable, RustcDecodable, Debug, HashStable_Generic)]
 pub enum CrateSugar {
     /// Source is `pub(crate)`.
     PubCrate,