Trait funlib::Functor

pub trait Functor<B>: HKT<B> {
    fn fmap<F>(&self, f: F) -> Self::M
    where
        F: Fn(&Self::A) -> B;
}

Functor type class

Required methods

fn fmap<F>(&self, f: F) -> Self::M where
    F: Fn(&Self::A) -> B, 

Functor map

Examples

use funlib::Functor;
let n = Some(1).fmap(|i| i * 4);
assert_eq!(Some(4), n);

Implementations on Foreign Types

impl<A, B> Functor<B> for Option<A>

fn fmap<F>(&self, f: F) -> Option<B> where
    F: Fn(&A) -> B, 

impl<A, B> Functor<B> for Box<A>

fn fmap<F>(&self, f: F) -> Box<B> where
    F: Fn(&A) -> B, 

impl<A, B> Functor<B> for Rc<A>

fn fmap<F>(&self, f: F) -> Rc<B> where
    F: Fn(&A) -> B, 

impl<A, B> Functor<B> for Vec<A>

fn fmap<F>(&self, f: F) -> Vec<B> where
    F: Fn(&A) -> B, 

Implementors