Struct WriteSources 

pub struct WriteSources {
    pub generation: Option<ChangeId>,
    pub setters: BTreeMap<String, CellSource>,
}

The author’s observed generation source and replaced cell setters.

Fields

generation: Option<ChangeId>

Absent exactly at generation zero.

setters: BTreeMap<String, CellSource>

Authored column order is increasing name order. A delete retains every replaced setter even when its old scalar map is empty. Columns which have never been set have no setter; inserts replace no cells.

Implementations

impl WriteSources

pub fn changes(&self) -> impl Iterator<Item = &ChangeId>

Generation first, then setters in authored column order. Repeated identities in different roles remain separate entries.

pub fn validate_past(&self, past: &impl WritePast) -> Result<(), Error>

Source identities must have been read, including implicit own predecessors. Timestamps and original row/cell evidence are checked by the database.

Trait Implementations

impl Clone for WriteSources

fn clone(&self) -> WriteSources

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for WriteSources

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

Formats the value using the given formatter.

impl Default for WriteSources

fn default() -> WriteSources

Returns the “default value” for a type.

impl PartialEq for WriteSources

fn eq(&self, other: &WriteSources) -> 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 WriteSources

impl StructuralPartialEq for WriteSources