Trait Functor

pub trait Functor: SelfConstraint {
    type Inner;
    type Structure<A>: Functor<Inner = A>;

    // Required method
    fn fmap<A, B, F>(a: Self::Structure<A>, f: F) -> Self::Structure<B>
       where F: Fn(A) -> B;
}

Required Associated Types

type Inner

type Structure<A>: Functor<Inner = A>

Required Methods

fn fmap<A, B, F>(a: Self::Structure<A>, f: F) -> Self::Structure<B>

where F: Fn(A) -> B,

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementations on Foreign Types

impl<T> Functor for Option<T>

type Inner = T

type Structure<A> = Option<A>

fn fmap<A, B, F>(a: Self::Structure<A>, f: F) -> Self::Structure<B>

where F: Fn(A) -> B,

impl<T> Functor for Vec<T>

type Inner = T

type Structure<U> = Vec<U>

fn fmap<A, B, F>(a: Self::Structure<A>, f: F) -> Self::Structure<B>

where F: Fn(A) -> B,

impl<T, const M: usize> Functor for [T; M]

type Inner = T

type Structure<U> = [U; M]

fn fmap<A, B, F>(a: Self::Structure<A>, f: F) -> Self::Structure<B>

where F: Fn(A) -> B,

Implementors

impl<T> Functor for ExactlyOne<T>

type Inner = T

type Structure<A> = ExactlyOne<A>

impl<T, U> Functor for Tuple<T, U>

type Inner = U

type Structure<A> = Tuple<T, A>