pub type P40 = PInt<U40>;
struct P40 { pub(crate) n: UInt<UInt<UInt<UInt<UInt<UInt<UTerm, B1>, B0>, B1>, B0>, B0>, B0>, }
n: UInt<UInt<UInt<UInt<UInt<UInt<UTerm, B1>, B0>, B1>, B0>, B0>, B0>