Struct OutputDeck 

pub struct OutputDeck { /* private fields */ }

Mutable typed deck collecting lane outputs for one tick.

Each typed slot is created on first access, holding T::default() until a lane writes into it. The engine drains specific types at the I/O boundary (submit, present) via OutputDeck::take.

Implementations

impl OutputDeck

pub fn new() -> Self

Creates an empty deck.

pub fn slot<T: Default + Any + Send + Sync>(&mut self) -> &mut T

Returns a mutable reference to the slot for type T, creating it with T::default() on first access.

Lanes call this to accumulate outputs (e.g. push command buffers onto a Vec).

pub fn take<T: Default + Any + Send + Sync>(&mut self) -> T

Removes and returns the slot for type T, replacing it with the default value (so subsequent ticks start clean).

Returns T::default() if no lane wrote into this slot during the tick. Used by the engine at the I/O boundary.

pub fn contains<T: Any + Send + Sync>(&self) -> bool

Reports whether a slot of the given type has been written this tick.

pub fn len(&self) -> usize

Number of slots currently holding data.

pub fn is_empty(&self) -> bool

Whether no slots have been written.

pub fn clear(&mut self)

Clears all slots. Called by the scheduler between ticks if a deck instance is reused rather than reallocated.

pub fn merge_from(&mut self, other: OutputDeck)

Moves every slot from other into self.

Used by the parallel executor to fold a worker’s private deck shard back into the shared deck after a concurrent wave. The merged shards are expected to write disjoint slot types (guaranteed by the executor’s AgentAccess::Isolated eligibility rules). A colliding TypeId is therefore a scheduling bug: the existing slot is kept and the collision logged, rather than silently dropping one side’s outputs.

Trait Implementations

impl Debug for OutputDeck

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

Formats the value using the given formatter.

impl Default for OutputDeck

fn default() -> Self

Returns the “default value” for a type.