Enum Cardinality 

pub enum Cardinality {
    Zero,
    One,
    Many,
}

Switchboard client types for guest code. Cardinality constraint for endpoints.

Variants

Zero

No channels are permitted.

One

At most one channel may be attached.

Many

Any number of channels may be attached.

Implementations

impl Cardinality

pub fn allows(self, count: usize) -> bool

Returns true if the provided count is permitted.

Trait Implementations

impl Clone for Cardinality

fn clone(&self) -> Cardinality

Returns a duplicate 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<(), Error>

Formats the value using the given formatter.

impl PartialEq for Cardinality

fn eq(&self, other: &Cardinality) -> 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 TryFrom<Cardinality> for Cardinality

type Error = ProtocolError

The type returned in the event of a conversion error.

fn try_from( value: Cardinality, ) -> Result<Cardinality, <Cardinality as TryFrom<Cardinality>>::Error>

Performs the conversion.

impl Copy for Cardinality

impl Eq for Cardinality

impl StructuralPartialEq for Cardinality