Enum Operation

pub enum Operation<K: Array, V: Array> {
    Deleted(K),
    Update(K, V),
    Commit(u64),
}

An operation applied to an authenticated database.

Variants

Deleted(K)

Indicates the key no longer has a value.

Update(K, V)

Indicates the key now has the wrapped value.

Commit(u64)

Indicates all prior operations are no longer subject to rollback, and the floor on inactive operations has been raised to the wrapped value.

Implementations

impl<K: Array, V: Array> Operation<K, V>

pub fn to_key(&self) -> Option<&K>

If this is a Operation::Update or Operation::Deleted operation, returns the key. Otherwise, returns None.

pub fn to_value(&self) -> Option<&V>

If this is a Operation::Update operation, returns the value. Otherwise, returns None.

Trait Implementations

impl<K: Clone + Array, V: Clone + Array> Clone for Operation<K, V>

fn clone(&self) -> Operation<K, V>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<K: Debug + Array, V: Debug + Array> Debug for Operation<K, V>

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

Formats the value using the given formatter.

impl<K: Array, V: Array> Display for Operation<K, V>

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

Formats the value using the given formatter.

impl<K: Array, V: Array> FixedSize for Operation<K, V>

const SIZE: usize

The size of the encoded value (in bytes).

impl<K: Hash + Array, V: Hash + Array> Hash for Operation<K, V>

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl<K: Ord + Array, V: Ord + Array> Ord for Operation<K, V>

fn cmp(&self, other: &Operation<K, V>) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl<K: PartialEq + Array, V: PartialEq + Array> PartialEq for Operation<K, V>

fn eq(&self, other: &Operation<K, V>) -> bool

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl<K: PartialOrd + Array, V: PartialOrd + Array> PartialOrd for Operation<K, V>

fn partial_cmp(&self, other: &Operation<K, V>) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

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

Tests less than (for self and other) and is used by the < operator.

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

Tests less than or equal to (for self and other) and is used by the <= operator.

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

Tests greater than (for self and other) and is used by the > operator.

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

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl<K: Array, V: Array> Read for Operation<K, V>

type Cfg = ()

The Cfg type parameter allows passing configuration during the read process. This is crucial for safely decoding untrusted data, for example, by providing size limits for collections or strings.

fn read_cfg(buf: &mut impl Buf, _: &()) -> Result<Self, CodecError>

Reads a value from the buffer using the provided configuration cfg.

impl<K: Array, V: Array> Write for Operation<K, V>

fn write(&self, buf: &mut impl BufMut)

Writes the binary representation of self to the provided buffer buf.

impl<K: Eq + Array, V: Eq + Array> Eq for Operation<K, V>

impl<K: Array, V: Array> StructuralPartialEq for Operation<K, V>