3 use std::convert::TryFrom;
5 pub trait FieldElement {
6 type Integer: TryFrom<usize, Error = std::num::TryFromIntError>;
8 fn valid_integer_try_from<N>(i: N) -> Result<Self::Integer, ()>
10 Self::Integer: TryFrom<N>,
12 Self::Integer::try_from(i).map_err(|_| ())