Struct Change 

pub struct Change<V> {
    pub generation: u64,
    pub operation: Operation<V>,
}

A row change carries the generation on the authoring device (§8.3).

Fields

generation: u64

Generation at which the change was made.

operation: Operation<V>

The change and the values it sets.

Implementations

impl<V> Change<V>

pub fn validate(&self, row: &RowId) -> Result<(), MergeError>

Validate generation parity, advancement without overflow, and every written parent’s generation and audience for this row (§8.3–§9.1, §15). Values and their encodings are opaque here. The authoring database establishes generation witnesses; crate::apply checks the received change against applied metadata.

pub fn after(&self) -> Result<u64, MergeError>

The row’s generation after this change: an insert or a delete advances it, an update keeps it (§8.3).

pub fn incarnation(&self) -> Result<u64, MergeError>

The incarnation this change belongs to: generation + 1 for an insert, generation for an update or delete. Invalid parity is a typed error.

Trait Implementations

impl<V: Clone> Clone for Change<V>

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

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<V: Debug> Debug for Change<V>

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

Formats the value using the given formatter.

impl<V: PartialEq> PartialEq for Change<V>

fn eq(&self, other: &Change<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: Eq> Eq for Change<V>

impl<V> StructuralPartialEq for Change<V>