Struct ReverseCursor 

pub struct ReverseCursor { /* private fields */ }

Stable cursor token for resumable reverse scans.

The token records the next exclusive upper bound. A start cursor scans from the end of the requested range; a resumed cursor scans keys strictly before before_key.

Implementations

impl ReverseCursor

pub fn end() -> Self

Start scanning from the end of the requested range.

pub fn before_key(key: impl Into<Vec<u8>>) -> Self

Resume scanning strictly before key.

pub fn before(&self) -> Option<&[u8]>

Return the key this cursor resumes before, if any.

pub fn is_end(&self) -> bool

Whether this cursor represents the end of a range.

Trait Implementations

impl Clone for ReverseCursor

fn clone(&self) -> ReverseCursor

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ReverseCursor

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

Formats the value using the given formatter.

impl Default for ReverseCursor

fn default() -> ReverseCursor

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for ReverseCursor

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Eq for ReverseCursor

impl PartialEq for ReverseCursor

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

Equality operator ==.

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

Inequality operator !=.

impl Serialize for ReverseCursor

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for ReverseCursor