Enum QueryState 

pub enum QueryState {
    NotComputed,
    InProgress,
    Memoized(Revision),
    Stale,
}

The state of a query computation.

Variants

NotComputed

Query has not been computed yet.

InProgress

Query is currently being computed (cycle detection).

Memoized(Revision)

Query has been computed and memoized.

Stale

Query result is stale and needs recomputation.

Trait Implementations

impl Clone for QueryState

fn clone(&self) -> QueryState

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for QueryState

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

Formats the value using the given formatter.

impl PartialEq for QueryState

fn eq(&self, other: &QueryState) -> 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.

impl Copy for QueryState

impl Eq for QueryState

impl StructuralPartialEq for QueryState