Struct Cell 

pub struct Cell { /* private fields */ }

A cell: None is typed SQL NULL; Some contains ordinary SIM data.

Implementations

impl Cell

pub const fn new(domain: DomainId, value: Option<Datum>) -> Self

Constructs a typed cell.

pub const fn null(domain: DomainId) -> Self

Constructs typed NULL.

pub const fn domain(&self) -> &DomainId

Returns the logical domain.

pub const fn value(&self) -> Option<&Datum>

Returns the optional ordinary datum.

Trait Implementations

impl Clone for Cell

fn clone(&self) -> Cell

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Cell

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

Formats the value using the given formatter.

impl Eq for Cell

impl PartialEq for Cell

fn eq(&self, other: &Cell) -> bool

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for Cell

impl ToRelationDatum for Cell

fn to_datum(&self) -> Datum

Returns the record’s single fixed Datum::Node projection.

fn card_datum(&self) -> Datum

Returns the same ordinary-data projection for Card consumers.

fn lisp_datum(&self) -> Datum

Returns the same ordinary-data projection for Lisp codecs.