Struct UseState 

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

A value kept between rebuilds by BuildContext::use_state. Changing it asks for a rebuild; reading it does not.

Cloning a UseState clones the handle: every clone reads and writes the same value, which is what lets a handler own one.

Implementations

impl<T: 'static> UseState<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, and asks for a rebuild.

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

Changes the value in place, and asks for a rebuild.

Trait Implementations

impl<T> Clone for UseState<T>

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<T: Debug> Debug for UseState<T>

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.