Enum Operation 

pub enum Operation<V: ValueEncoding> {
    Append(V::Value),
    Commit(Option<V::Value>),
}

Operations for keyless stores.

Variants

Append(V::Value)

Wraps the value appended to the database by this operation.

Commit(Option<V::Value>)

Indicates the database has been committed.

Implementations

impl<V: ValueEncoding> Operation<V>

pub fn into_value(self) -> Option<V::Value>

Returns the value (if any) wrapped by this operation.

Trait Implementations

impl<V: Clone + ValueEncoding> Clone for Operation<V>

where V::Value: Clone,

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

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<V: Codec> Committable for Operation<V>

fn is_commit(&self) -> bool

If this operation is a commit operation.

impl<V: Debug + ValueEncoding> Debug for Operation<V>

where V::Value: Debug,

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

Formats the value using the given formatter.

impl<V: ValueEncoding> Display for Operation<V>

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

Formats the value using the given formatter.

impl<V: VariableValue> EncodeSize for Operation<VariableEncoding<V>>

fn encode_size(&self) -> usize

Returns the encoded size of this value (in bytes).

fn encode_inline_size(&self) -> usize

Returns the encoded size excluding bytes passed to BufsMut::push during Write::write_bufs. Used to size the working buffer for inline writes. Override alongside Write::write_bufs for types where large Bytes fields go via push; failing to do so will over-allocate.

impl<V: FixedValue> FixedSize for Operation<FixedEncoding<V>>

const SIZE: usize

The size of the encoded value (in bytes).

impl<V: Hash + ValueEncoding> Hash for Operation<V>

where V::Value: Hash,

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<V: Ord + ValueEncoding> Ord for Operation<V>

where V::Value: Ord,

fn cmp(&self, other: &Operation<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<V: PartialEq + ValueEncoding> PartialEq for Operation<V>

where V::Value: PartialEq,

fn eq(&self, other: &Operation<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<V: PartialOrd + ValueEncoding> PartialOrd for Operation<V>

where V::Value: PartialOrd,

fn partial_cmp(&self, other: &Operation<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<V: Codec> Read for Operation<V>

type Cfg = <V as Codec>::ReadCfg

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, cfg: &Self::Cfg) -> Result<Self, CodecError>

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

impl<V: Codec> Write for Operation<V>

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

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

fn write_bufs(&self, buf: &mut impl BufsMut)

Writes to a BufsMut, allowing existing Bytes chunks to be appended via BufsMut::push instead of written inline. Must encode to the same format as Write::write. Defaults to Write::write.

impl<V: Eq + ValueEncoding> Eq for Operation<V>

where V::Value: Eq,

impl<V: ValueEncoding> StructuralPartialEq for Operation<V>