Function univariant_uninterned

fn univariant_uninterned<'tcx>(
    cx: &LayoutCx<'tcx>,
    ty: Ty<'tcx>,
    fields: &IndexSlice<FieldIdx, TyAndLayout<'tcx>>,
    repr: &ReprOptions,
    kind: StructKind,
) -> Result<LayoutData<FieldIdx, VariantIdx>, &'tcx LayoutError<'tcx>>