Struct Polled 

pub struct Polled<T> {
    pub value: T,
    pub revision: RevisionCounter,
}

Result of polling a query, containing the value and its revision.

This is returned by QueryRuntime::poll and provides both the query result and its change revision, enabling efficient change detection for subscription patterns.

Example

let result = runtime.poll(MyQuery::new())?;

// Access the value via Deref
println!("{:?}", *result);

// Check if changed since last poll
if result.revision > last_known_revision {
    notify_subscribers(&result.value);
    last_known_revision = result.revision;
}

Fields

value: T

The query result value.

revision: RevisionCounter

The revision at which this value was last changed.

Compare this with a previously stored revision to detect changes.

Trait Implementations

impl<T: Clone> Clone for Polled<T>

fn clone(&self) -> Polled<T>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<T: Debug> Debug for Polled<T>

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

Formats the value using the given formatter.

impl<T: Deref> Deref for Polled<T>

type Target = <T as Deref>::Target

The resulting type after dereferencing.

fn deref(&self) -> &Self::Target

Dereferences the value.