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Make comment about dummy type a bit more clear

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Santiago Pastorino 2019-10-01 12:51:15 -03:00 committed by GitHub
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src/librustc/ty/mod.rs
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@ -600,7 +600,8 @@ impl<'tcx> rustc_serialize::UseSpecializedDecodable for Ty<'tcx> {}
pub type CanonicalTy<'tcx> = Canonical<'tcx, Ty<'tcx>>; pub type CanonicalTy<'tcx> = Canonical<'tcx, Ty<'tcx>>;
extern { extern {
/// A dummy type used to force `List` to by unsized without requiring fat pointers. /// A dummy type used to force List to be unsized while not requiring references to it be wide
/// pointers.
type OpaqueListContents; type OpaqueListContents;
} }