HIR's Slice should be SliceRef or BorrowedSlice

[robertbastian]

"Slice" is the unsized datatype [T], which we don't support.

In the future we want an OwnedSlice (a.k.a. Box<[T]>), so we should be clear about what type of slice this is.

[Manishearth]

IME in usual parlance "slice" refers to the reference types, with "unsized slice" and "box slice" being used for the others. The unsized datatype is technically called slice but it's rather rare so nobody really does.

That said I'm fine with SliceRef.