Struct CellMap 

pub struct CellMap { /* private fields */ }

Resolve-or-create map from a coordinate to the child component that represents it. Interior-mutable so it is reachable through a read guard on the parent, mirroring Component::controls.

Implementations

impl CellMap

pub fn new() -> Self

pub fn resolve( &self, parent: &Arc<RwLock<Component>>, coord: &Labels, ) -> Arc<RwLock<Component>>

The cell for coord under parent, creating and attaching it on first sight. Idempotent: the same coordinate yields the same component for as long as the parent lives, so a caller may resolve per cycle and get a registry write only once.

coord carries only the dimension labels this cell adds. Inherited labels come from the parent via crate::component::attach, which also enforces that no ancestor already owns these names.

pub fn len(&self) -> usize

Number of distinct coordinates materialised so far. For diagnostics and tests — there is deliberately no cap: how many series a dimension has is a modelling decision, and silently dropping data would be worse than having many.

pub fn is_empty(&self) -> bool

Trait Implementations

impl Default for CellMap

fn default() -> Self

Returns the “default value” for a type.