Struct Getter 

pub struct Getter<S, A> { /* private fields */ }

A read-only optic that extracts a single focus from a source.

This is the “getter” component of a lens, without any modification capability.

Implementations

impl<S, A> Getter<S, A>

pub fn new(get: fn(&S) -> A) -> Getter<S, A>

pub fn get(&self, s: &S) -> A

pub fn then<B>(self, inner: Getter<A, B>) -> ComposedGetter<S, B>

where S: 'static, A: 'static, B: 'static,

Compose with another getter for deeper access.

Trait Implementations

impl<S, A> Optic for Getter<S, A>