fp-core 0.1.9

A library for functional programming in Rust
Documentation 
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use crate::hkt::HKT;

pub trait Functor<B>: HKT<B> {
    fn fmap<F>(self, f: F) -> Self::Target
    where
        F: FnOnce(Self::Current) -> B;
}

impl<A, B> Functor<B> for Option<A> {
    fn fmap<F>(self, f: F) -> Self::Target
    where
        // A is Self::Current
        F: FnOnce(A) -> B,
    {
        self.map(f)
    }
}

impl<A, B, E> Functor<B> for Result<A, E> {
    fn fmap<F>(self, f: F) -> Self::Target
    where
        // A is Self::Current
        F: FnOnce(A) -> B,
    {
        self.map(f)
    }
}