Enum edgedb_protocol::common::Cardinality

pub enum Cardinality {
    NoResult,
    AtMostOne,
    One,
    Many,
    AtLeastOne,
}

Variants

NoResult

AtMostOne

One

Many

AtLeastOne

Implementations

impl Cardinality

pub fn is_optional(&self) -> bool

Trait Implementations

impl Clone for Cardinality

fn clone(&self) -> Cardinality

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Cardinality

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

Formats the value using the given formatter.

impl PartialEq<Cardinality> for Cardinality

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

This method tests for self and other values to be equal, and is used by ==.

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

This method tests for !=.

impl TryFrom<u8> for Cardinality

type Error = DecodeError

The type returned in the event of a conversion error.

fn try_from(cardinality: u8) -> Result<Cardinality, DecodeError>

Performs the conversion.

impl Copy for Cardinality

impl Eq for Cardinality

impl StructuralEq for Cardinality

impl StructuralPartialEq for Cardinality