Remove unnecessary region, relax Sized bounds

Author: jonas-schievink

crates/hir_def/src/intern.rs

@@ -16,7 +16,7 @@ use rustc_hash::FxHasher;
 type InternMap<T> = DashMap<Arc<T>, (), BuildHasherDefault<FxHasher>>;
 
 #[derive(Hash)]
-pub struct Interned<T: Internable> {
+pub struct Interned<T: Internable + ?Sized> {
     arc: Arc<T>,
 }
 
@@ -52,7 +52,7 @@ impl<T: Internable> Interned<T> {
     }
 }
 
-impl<T: Internable> Drop for Interned<T> {
+impl<T: Internable + ?Sized> Drop for Interned<T> {
     fn drop(&mut self) {
         // When the last `Ref` is dropped, remove the object from the global map.
         if Arc::strong_count(&self.arc) == 2 {
@@ -83,23 +83,23 @@ impl<T: Internable> Drop for Interned<T> {
 }
 
 /// Compares interned `Ref`s using pointer equality.
-impl<T: Internable> PartialEq for Interned<T> {
+impl<T: Internable + ?Sized> PartialEq for Interned<T> {
     #[inline]
     fn eq(&self, other: &Self) -> bool {
         Arc::ptr_eq(&self.arc, &other.arc)
     }
 }
 
-impl<T: Internable> Eq for Interned<T> {}
+impl<T: Internable + ?Sized> Eq for Interned<T> {}
 
-impl<T: Internable> AsRef<T> for Interned<T> {
+impl<T: Internable + ?Sized> AsRef<T> for Interned<T> {
     #[inline]
     fn as_ref(&self) -> &T {
         &self.arc
     }
 }
 
-impl<T: Internable> Deref for Interned<T> {
+impl<T: Internable + ?Sized> Deref for Interned<T> {
     type Target = T;
 
     #[inline]
@@ -108,40 +108,38 @@ impl<T: Internable> Deref for Interned<T> {
     }
 }
 
-impl<T: Internable> Clone for Interned<T> {
+impl<T: Internable + ?Sized> Clone for Interned<T> {
     fn clone(&self) -> Self {
         Self { arc: self.arc.clone() }
     }
 }
 
-impl<T: Debug + Internable> Debug for Interned<T> {
+impl<T: Debug + Internable + ?Sized> Debug for Interned<T> {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         (*self.arc).fmt(f)
     }
 }
 
-pub struct InternStorage<T> {
+pub struct InternStorage<T: ?Sized> {
     map: OnceCell<InternMap<T>>,
 }
 
-impl<T> InternStorage<T> {
+impl<T: ?Sized> InternStorage<T> {
     pub const fn new() -> Self {
         Self { map: OnceCell::new() }
     }
 }
 
-impl<T: Internable> InternStorage<T> {
+impl<T: Internable + ?Sized> InternStorage<T> {
     fn get(&self) -> &InternMap<T> {
         self.map.get_or_init(DashMap::default)
     }
 }
 
-pub trait Internable: Hash + Eq + Sized + 'static {
+pub trait Internable: Hash + Eq + 'static {
     fn storage() -> &'static InternStorage<Self>;
 }
 
-// region:`Internable` implementations
-
 macro_rules! impl_internable {
     ( $($t:ty),+ $(,)? ) => { $(
         impl Internable for $t {
@@ -154,5 +152,3 @@ macro_rules! impl_internable {
 }
 
 impl_internable!(crate::type_ref::TypeRef, crate::type_ref::TraitRef, crate::path::ModPath);
-
-// endregion