Enum CompResult

pub enum CompResult<K, V> {
    StillNone(Arc<K>),
    Unchanged(Entry<K, V>),
    Inserted(Entry<K, V>),
    ReplacedWith(Entry<K, V>),
    Removed(Entry<K, V>),
}

The result of the and_compute_with and similar methods.

Variants

StillNone(Arc<K>)

The entry did not exist and still does not exist.

Unchanged(Entry<K, V>)

The entry already existed and was not modified. The returned entry contains the existing value.

Inserted(Entry<K, V>)

The entry did not exist and was inserted. The returned entry contains the inserted value.

ReplacedWith(Entry<K, V>)

The entry already existed and its value was replaced with a new one. The returned entry contains the new value (not the replaced value).

Removed(Entry<K, V>)

The entry already existed and was removed. The returned entry contains the removed value.

Note: StillNone is returned instead of Removed if Op::Remove was requested but the entry did not exist.

Implementations

impl<K, V> CompResult<K, V>

pub fn into_entry(self) -> Option<Entry<K, V>>

Returns the contained Some(Entry) if any. Otherwise returns None. Consumes the self value.

pub fn unwrap(self) -> Entry<K, V>

Unwraps the contained Entry, consuming the self value.

Panics

Panics if the self value is StillNone.

Trait Implementations

impl<K: Debug, V: Debug> Debug for CompResult<K, V>

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

Formats the value using the given formatter.