Enum GetOrSetEntry 

pub enum GetOrSetEntry {
    Occupied(IncomingValue),
    Vacant(Vacancy),
}

The get-or-set operation asynchronously returns one of two cases enumerated by get-or-set-entry: in the occupied case, the given key already has a value present in the cache; in the vacant case, there was no value and the caller should write a value into the returned vacancy. This operation allows multiple concurrent get-or-set invocations to rendezvous such that only one invocation receives the vacant result while all other invocations wait until the vacancy is filled before receiving an occupied result. Implementations are not required to implement this rendezvous or to rendezvous in all possible cases.

Variants

Occupied(IncomingValue)

Vacant(Vacancy)

Trait Implementations

impl Debug for GetOrSetEntry

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

Formats the value using the given formatter.