Enum Placement 

pub enum Placement {
    Only(CoreId),
    AnyOther,
    Any,
    AnyOf(Vec<CoreId>),
}

Which core, stated as intent rather than as an index the caller computed.

The trait’s primitive takes a single CoreId, so anything other than Only has to be resolved before dispatch — and resolution needs current_core() and num_cores(), both of which the trait already exposes. Expressing the intent here rather than at the call site is also what makes SpawnError::InboxFull recoverable: a candidate set can be retried across cores, where a single id can only be retried against the core that was already full.

Variants

Only(CoreId)

This exact core.

AnyOther

Any core except the one running this call — the usual intent when the point is to stop competing with the caller for its own core.

Any

Any core at all, current included.

AnyOf(Vec<CoreId>)

One of these, in order, falling through on back-pressure.

Trait Implementations

impl Clone for Placement

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Placement

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

Formats the value using the given formatter.

impl Eq for Placement

impl From<CoreId> for Placement

fn from(core_id: CoreId) -> Self

Converts to this type from the input type.

impl<T: Into<CoreId>> From<Vec<T>> for Placement

fn from(cores: Vec<T>) -> Self

Converts to this type from the input type.

impl<T: Into<CoreId>, const N: usize> From<[T; N]> for Placement

fn from(cores: [T; N]) -> Self

Converts to this type from the input type.

impl From<usize> for Placement

fn from(core_id: usize) -> Self

Converts to this type from the input type.

impl PartialEq for Placement

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for Placement