1 pub fn iso<A, B, F1, F2>(a: F1, b: F2) -> (Box<dyn Fn(A) -> B>, Box<dyn Fn(B) -> A>)
3 F1: (Fn(A) -> B) + 'static,
4 F2: (Fn(B) -> A) + 'static,
6 (Box::new(a), Box::new(b))
8 pub fn iso_un_option<A, B>() -> (Box<dyn Fn(A) -> B>, Box<dyn Fn(B) -> A>) {
9 let left = |o_a: Option<_>| o_a.unwrap();
10 let right = |o_b: Option<_>| o_b.unwrap();