Enum VersionedMapUpdate 

pub enum VersionedMapUpdate {
    Applied {
        previous: Option<MapVersionId>,
        current: MapVersion,
    },
    Unchanged {
        current: Option<MapVersion>,
    },
    Conflict {
        current: Option<MapVersion>,
    },
}

Outcome of a compare-and-update operation.

Variants

Applied

The update committed and produced this version.

Fields

previous: Option<MapVersionId>

Previous head, or None when the index was initialized.

current: MapVersion

New current version.

Unchanged

The requested mutations did not change the current tree.

Fields

current: Option<MapVersion>

Current version, or None for an absent index and an empty edit.

Conflict

The caller’s expected head did not match the current head.

Fields

current: Option<MapVersion>

Current head at the time the conflict was observed.

Implementations

impl VersionedMapUpdate

pub fn current(&self) -> Option<&MapVersion>

Return the resulting current version for applied or unchanged updates.

pub fn is_applied(&self) -> bool

Whether a new head was committed.

pub fn is_conflict(&self) -> bool

Whether the caller’s expected head was stale.

Trait Implementations

impl Clone for VersionedMapUpdate

fn clone(&self) -> VersionedMapUpdate

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for VersionedMapUpdate

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

Formats the value using the given formatter.

impl PartialEq for VersionedMapUpdate

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for VersionedMapUpdate