Trait Apply

pub trait Apply<T> {
    type Cont<_T>;

    // Required method
    fn apply<U, F>(&self, rhs: F) -> Self::Cont<U>
       where F: FnOnce(&T) -> U;
}

Apply is a trait that allows for mapping over a reference to a type T by applying a function F to it, producing a new type U. The result is wrapped in a container type defined by the implementor of the trait.

Required Associated Types

type Cont<_T>

The associated type Cont is a higher-kinded type that represents the container that will hold the result of the mapping operation.

Required Methods

fn apply<U, F>(&self, rhs: F) -> Self::Cont<U>

where F: FnOnce(&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> Apply<T> for Option<T>

type Cont<U> = Option<U>

fn apply<U, F>(&self, rhs: F) -> <Option<T> as Apply<T>>::Cont<U>

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

Implementors