Enum StorageItem

pub enum StorageItem<T> {
    Item(T),
    Tombstone(u64),
}

Enum to denote whether the item is a valid type T or if it is a tombstone place holder used to show the item T was deleted.

Variants

Item(T)

Variant denoted a valid item of type T.

Tombstone(u64)

Marker showing that the item of type T was deleted at some point in the past with the provided version.

Trait Implementations

impl<T: Clone> Clone for StorageItem<T>

fn clone(&self) -> StorageItem<T>

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<T: Debug> Debug for StorageItem<T>

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

Formats the value using the given formatter.

impl<'de, T> Deserialize<'de> for StorageItem<T>

where T: Deserialize<'de>,

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl<T> From<StorageItem<T>> for Option<T>

fn from(val: StorageItem<T>) -> Self

Converts to this type from the input type.

impl<T> From<T> for StorageItem<T>

fn from(flag: T) -> Self

Converts to this type from the input type.

impl<T> TryFrom<StorageItem<T>> for SerializedItem

where T: Versioned + Serialize,

type Error = Error

The type returned in the event of a conversion error.

fn try_from(storage_item: StorageItem<T>) -> Result<Self, Self::Error>

Performs the conversion.

impl TryInto<StorageItem<Flag>> for SerializedItem

type Error = Error

The type returned in the event of a conversion error.

fn try_into(self) -> Result<StorageItem<Flag>, Self::Error>

Performs the conversion.

impl TryInto<StorageItem<Segment>> for SerializedItem

type Error = Error

The type returned in the event of a conversion error.

fn try_into(self) -> Result<StorageItem<Segment>, Self::Error>

Performs the conversion.

impl<T: Versioned> Versioned for StorageItem<T>

fn version(&self) -> u64

Retrieve the version for this item instance.

fn is_greater_than_or_equal(&self, version: u64) -> bool

Determine if this item’s version is greater than or equal to the provided version parameter.