Enum ObservationKind 

pub enum ObservationKind {
    Read,
    Missing,
    Listing,
    Policy,
    Epoch,
    Custom(&'static str),
}

The reason a query depends on a key.

Variants

Read

A query read another query’s value.

Missing

A query observed that a name was absent.

Listing

A query observed a directory or collection listing.

Policy

A query observed policy or authority state.

Epoch

A query observed an external backend epoch.

Custom(&'static str)

A domain-specific observation class.

Trait Implementations

impl Clone for ObservationKind

fn clone(&self) -> ObservationKind

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ObservationKind

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

Formats the value using the given formatter.

impl Eq for ObservationKind

impl Hash for ObservationKind

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 Ord for ObservationKind

fn cmp(&self, other: &ObservationKind) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl PartialEq for ObservationKind

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

Equality operator ==.

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

Inequality operator !=.

impl PartialOrd for ObservationKind

fn partial_cmp(&self, other: &ObservationKind) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

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

Tests less than (for self and other) and is used by the < operator.

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

Tests less than or equal to (for self and other) and is used by the <= operator.

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

Tests greater than (for self and other) and is used by the > operator.

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

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl StructuralPartialEq for ObservationKind