Struct UseRef 

pub struct UseRef<T> { /* private fields */ }

A value kept between rebuilds by BuildContext::use_ref. Unlike UseState, changing it does not ask for a rebuild: it is for what the interface does not show.

Implementations

impl<T: 'static> UseRef<T>

pub fn get(&self) -> T

where T: Clone,

A copy of the current value.

pub fn with<R>(&self, read: impl FnOnce(&T) -> R) -> R

Reads the current value without copying it.

pub fn set(&self, value: T)

Replaces the value.

pub fn update(&self, change: impl FnOnce(&mut T))

Changes the value in place.

Trait Implementations

impl<T> Clone for UseRef<T>

fn clone(&self) -> Self

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.