Move core::alloc::CollectionAllocErr to alloc::collections

src/libcore/alloc.rs

@@ -385,34 +385,6 @@ impl fmt::Display for CannotReallocInPlace {
     }
 }
 
-/// Augments `AllocErr` with a CapacityOverflow variant.
-// FIXME: should this be in libcore or liballoc?
-#[derive(Clone, PartialEq, Eq, Debug)]
-#[unstable(feature = "try_reserve", reason = "new API", issue="48043")]
-pub enum CollectionAllocErr {
-    /// Error due to the computed capacity exceeding the collection's maximum
-    /// (usually `isize::MAX` bytes).
-    CapacityOverflow,
-    /// Error due to the allocator (see the `AllocErr` type's docs).
-    AllocErr,
-}
-
-#[unstable(feature = "try_reserve", reason = "new API", issue="48043")]
-impl From<AllocErr> for CollectionAllocErr {
-    #[inline]
-    fn from(AllocErr: AllocErr) -> Self {
-        CollectionAllocErr::AllocErr
-    }
-}
-
-#[unstable(feature = "try_reserve", reason = "new API", issue="48043")]
-impl From<LayoutErr> for CollectionAllocErr {
-    #[inline]
-    fn from(_: LayoutErr) -> Self {
-        CollectionAllocErr::CapacityOverflow
-    }
-}
-
 /// A memory allocator that can be registered as the standard library’s default
 /// though the `#[global_allocator]` attributes.
 ///