Enum KeptLeaf 

pub enum KeptLeaf {
    Known(Leaf),
    Digest {
        row: RowId,
        generation: u64,
        kind: CellKind,
        column: String,
        digest: [u8; 32],
    },
    Step,
}

One leaf of a kept record (D7.3, D11): known whole, a cell whose value the record holds only as a digest, or an operation, never opened.

Variants

Known(Leaf)

A leaf the record holds whole: a creation, a deletion, or a cell kept in full.

Digest

A cell kept as a digest. It opens as the cell its value matches.

Fields

row: RowId

The changed row.

generation: u64

The generation before the change.

kind: CellKind

Insert or update.

column: String

The column.

digest: [u8; 32]

The value’s digest.

Step

One of the record’s operations.

Implementations

impl KeptLeaf

pub fn with_value( &self, value: &ColumnValue<Value>, ) -> Result<Option<Leaf>, Error>

The leaf this one is when its cell holds value: a known leaf stays as it is; a digest becomes the cell when value names no parents and is the value it digests.

Trait Implementations

impl Clone for KeptLeaf

fn clone(&self) -> KeptLeaf

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for KeptLeaf

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

Formats the value using the given formatter.

impl PartialEq for KeptLeaf

fn eq(&self, other: &KeptLeaf) -> 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 Eq for KeptLeaf

impl StructuralPartialEq for KeptLeaf