Struct RecomposeScope 

pub struct RecomposeScope { /* private fields */ }

The unit of recomposition. State read inside a scope invalidates it, and a recomposition runs only the content of the invalid scopes. Clones refer to the same scope.

Implementations

impl RecomposeScope

pub fn id(&self) -> usize

Returns an id that is unique among the live scopes.

pub fn is_invalid(&self) -> bool

Returns true if state that the scope read has changed since it last recomposed.

pub fn is_active(&self) -> bool

Returns false between deactivate and reactivate.

pub fn owner_chain_deactivation_epoch(&self) -> u64

Total deactivations along this scope’s owner chain. A retained slot composition records this at compose time; a later mismatch means some enclosing composition was deactivated (its owned effects cancelled) since the slot last composed, so the retained content must recompose once to restart them — no flag on the slot’s own scopes carries that trace, because deactivation walks stop at slot-host boundaries.

pub fn deactivate(&self)

Marks the scope inactive, as when its content is retained or held for reuse. An inactive scope is not queued for recomposition until it is reactivated.

pub fn reactivate(&self)

Marks the scope active again and queues it for recomposition if it was invalidated while inactive.

pub fn force_reuse(&self)

Makes the next should_recompose return false even if the scope is invalid. Cancels a pending force_recompose.

pub fn force_recompose(&self)

Makes the next should_recompose return true even if the scope is not invalid. Cancels a pending force_reuse.

pub fn should_recompose(&self) -> bool

Returns whether the scope’s content has to run now: true after force_recompose or when the scope is invalid, and false after force_reuse. A forced answer is used up by the call.

pub fn has_composed_once(&self) -> bool

Returns true once the scope has composed its content at least once.

Trait Implementations

impl Clone for RecomposeScope

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Eq for RecomposeScope

impl Hash for RecomposeScope

fn hash<H: Hasher>(&self, state: &mut H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for RecomposeScope

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

Equality operator ==.

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

Inequality operator !=.