Trait Functor

pub trait Functor<T>: HKT<T> {
    // Required method
    fn fmap<F, U>(&self, f: F) -> Self::Cont<U>
       where F: Fn(&T) -> U;
}

The Functor trait extends the HKT trait to provide a way to map over its content(s) using a function f that transforms values of type T into values of type U.

Required Methods

fn fmap<F, U>(&self, f: F) -> Self::Cont<U>

where F: Fn(&T) -> U,

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<T> for Option<T>

fn fmap<F, U>(&self, f: F) -> <Option<T> as HKT<T>>::Cont<U>

where F: Fn(&T) -> U,

Implementors