Trait MapTo 

pub trait MapTo<F, X>
where
    F: FnOnce(Self::Elem) -> X,
{
    type Cont<T>: ?Sized;
    type Elem;

    // Required method
    fn apply(&self, f: F) -> Self::Cont<X>;
}

The MapTo trait is similar to MapInto, but it operates on references to the container rather than consuming it. This allows for mapping functions over the elements of a container while retaining ownership of the original container.

Required Associated Types

type Cont<T>: ?Sized

type Elem

Required Methods

fn apply(&self, f: F) -> Self::Cont<X>

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<'a, U, V, F> MapTo<F, V> for &'a Vec<U>

where F: FnMut(&U) -> V,

type Cont<_T> = Vec<_T>

type Elem = &'a U

fn apply(&self, f: F) -> <&'a Vec<U> as MapTo<F, V>>::Cont<V>

impl<'a, U, V, F> MapTo<F, V> for Option<&'a U>

where F: for<'b> FnOnce(&'b U) -> V,

type Cont<T> = Option<T>

type Elem = &'a U

fn apply(&self, f: F) -> <Option<&'a U> as MapTo<F, V>>::Cont<V>

Implementors