Struct Observation 

pub struct Observation<K> { /* private fields */ }

One dependency observation captured by a query frame.

Implementations

impl<K> Observation<K>

pub fn new( key: K, kind: ObservationKind, revision: Revision, fingerprint: Option<ValueFingerprint>, ) -> Self

Creates an observation from a key, kind, revision, and optional value fingerprint.

pub fn read(key: K, revision: Revision, fingerprint: ValueFingerprint) -> Self

Creates a query-read observation.

pub fn key(&self) -> &K

Returns the observed key.

pub fn kind(&self) -> &ObservationKind

Returns the observation kind.

pub fn revision(&self) -> Revision

Returns the revision captured by the observation.

pub fn fingerprint(&self) -> Option<ValueFingerprint>

Returns the captured value fingerprint when this observation has one.

Trait Implementations

impl<K: Clone> Clone for Observation<K>

fn clone(&self) -> Observation<K>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<K: Debug> Debug for Observation<K>

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

Formats the value using the given formatter.

impl<K: Eq> Eq for Observation<K>

impl<K: Hash> Hash for Observation<K>

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<K: PartialEq> PartialEq for Observation<K>

fn eq(&self, other: &Observation<K>) -> bool

Equality operator ==.

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

Inequality operator !=.

impl<K: PartialEq> StructuralPartialEq for Observation<K>