Struct MemPerspective 

pub struct MemPerspective { /* private fields */ }

Trait Implementations

impl Debug for MemPerspective

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

Formats the value using the given formatter.

impl Perspective for MemPerspective

fn add_command(&mut self, command: &impl Command) -> Result<usize, StorageError>

Adds the given command to the head of the perspective. The command’s parent must be the head of the perspective.

fn policy(&self) -> PolicyId

Returns the id for the policy used for this perspective.

fn includes(&self, id: CmdId) -> bool

Returns true if the perspective contains a command with the given ID.

fn head_address(&self) -> Result<Prior<Address>, Bug>

Returns the head address in the perspective, if it exists

impl Query for MemPerspective

type QueryIterator = <MemFactPerspective as Query>::QueryIterator

Iterator for Query::query_prefix.

fn query( &self, name: &str, keys: &[Box<[u8]>], ) -> Result<Option<Box<[u8]>>, StorageError>

Look up a named fact by an exact match of the compound key.

fn query_prefix( &self, name: &str, prefix: &[Box<[u8]>], ) -> Result<Self::QueryIterator, StorageError>

Look up all named facts that begin with the prefix of keys, in sorted key order.

impl QueryMut for MemPerspective

fn insert(&mut self, name: String, keys: Keys, value: Box<[u8]>)

Insert a fact labeled by a name, with a given compound key and a value.

fn delete(&mut self, name: String, keys: Keys)

Delete any fact associated to the compound key, under the given name.

impl Revertable for MemPerspective

fn checkpoint(&self) -> Checkpoint

Create a checkpoint which can be used to revert the perspective.

fn revert(&mut self, checkpoint: Checkpoint) -> Result<(), Bug>

Revert the perspective to the state it was at when the checkpoint was created.

impl FactPerspective for MemPerspective