Trait Ref

pub trait Ref<'a, T> {
    // Required method
    fn from_ref(val: &'a T) -> Self;
}

A trait for things that are “close enough” to &'a T.

Required Methods

fn from_ref(val: &'a T) -> Self

Obtains this value from a reference, showing that it’s possible.

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, K, V, R: Ref<'a, K>> Ref<'a, (K, V)> for (R, &'a V)

Pull the key out of a key-value pair.

fn from_ref(val: &'a (K, V)) -> (R, &'a V)

impl<'a, T> Ref<'a, T> for &'a T

Identity implementation.

fn from_ref(val: &'a T) -> &'a T

Implementors

impl<'a, T: Copy> Ref<'a, T> for T

Values that can be copied can be copied instead of referenced.