Struct Version 

pub struct Version<V>
where
    V: Clone,
{
    pub created_by: TxnId,
    pub created_at: Timestamp,
    pub deleted_by: TxnId,
    pub deleted_at: Timestamp,
    pub value: Option<V>,
    pub prev: Option<Box<Version<V>>>,
}

A single version of a value

Fields

created_by: TxnId

Transaction that created this version

created_at: Timestamp

Timestamp when created

deleted_by: TxnId

Transaction that deleted this version (0 if not deleted)

deleted_at: Timestamp

Timestamp when deleted (0 if not deleted)

value: Option<V>

The value (None if this is a tombstone)

prev: Option<Box<Version<V>>>

Pointer to older version

Implementations

impl<V> Version<V>

where V: Clone,

pub fn new(value: V, txn_id: TxnId, timestamp: Timestamp) -> Version<V>

Create new version

pub fn tombstone(txn_id: TxnId, timestamp: Timestamp) -> Version<V>

Create tombstone version (delete marker)

pub fn is_tombstone(&self) -> bool

Check if this version is a tombstone

pub fn is_deleted(&self) -> bool

Check if this version is deleted

pub fn mark_deleted(&mut self, txn_id: TxnId, timestamp: Timestamp)

Mark as deleted by transaction

pub fn check_visibility(&self, snapshot: &Snapshot) -> VersionVisibility

Check visibility for a snapshot

Trait Implementations

impl<V> Clone for Version<V>

where V: Clone,

fn clone(&self) -> Version<V>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<V> Debug for Version<V>

where V: Debug + Clone,

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

Formats the value using the given formatter.