Struct WeakState

pub struct WeakState { /* private fields */ }

Type to avoid Rc cyles on IncrState

Implementations

impl WeakState

pub fn ptr_eq(&self, other: &Self) -> bool

pub fn strong_count(&self) -> usize

pub fn weak_count(&self) -> usize

pub fn upgrade(&self) -> Option<IncrState>

Much like std::rc::Weak::upgrade.

NOTE: If you are using WeakState so that it can be stored inside an incremental (e.g. incr.bind(move |_| weak_state.constant(5)) or observer.subscribe()), then you need to be a bit careful about what you do with that WeakState. Upgrading it just gives you an IncrState, which is capable of calling stabilise and panicking because you can’t stabilise recursively. So it may be best to keep it as WeakState, wherever possible.

pub fn constant<T: Value>(&self, value: T) -> Incr<T>

See IncrState::constant

pub fn fold<F, T: Value, R: Value>( &self, vec: Vec<Incr<T>>, init: R, f: F, ) -> Incr<R>

where F: FnMut(R, &T) -> R + 'static + NotObserver,

pub fn var<T: Value>(&self, value: T) -> Var<T>

pub fn var_current_scope<T: Value>(&self, value: T) -> Var<T>

pub fn within_scope<R>(&self, scope: Scope, f: impl FnOnce() -> R) -> R

pub fn current_scope(&self) -> Scope

pub fn save_dot_to_file(&self, named: &str)

pub fn save_dot_to_string(&self) -> String

pub fn unsubscribe(&self, token: SubscriptionToken)

Trait Implementations

impl Clone for WeakState

fn clone(&self) -> WeakState

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for WeakState

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

Formats the value using the given formatter.

impl PartialEq for WeakState

Implemented as pointer equality, like Weak::ptr_eq.

fn eq(&self, other: &Self) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.