Trait fp_core::lens::Lens

pub trait Lens<S, A> {
    fn get(s: &S) -> Option<&A>;
    fn set(a: A, s: &S) -> S;

    fn over(s: &S, f: &dyn Fn(Option<&A>) -> A) -> S { ... }
}

Required methods

fn get(s: &S) -> Option<&A>

fn set(a: A, s: &S) -> S

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Provided methods

fn over(s: &S, f: &dyn Fn(Option<&A>) -> A) -> S

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Implementors

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