fn build_ptr_tys<'tcx>( tcx: TyCtxt<'tcx>, pointee: Ty<'tcx>, unique_def: AdtDef<'tcx>, nonnull_def: AdtDef<'tcx>, ) -> (Ty<'tcx>, Ty<'tcx>, Ty<'tcx>)
Constructs the types used when accessing a Box’s pointer