Struct ForeignValue 

pub struct ForeignValue(pub Arc<dyn Any + Send + Sync>);

The opaque payload carried by NodeValue::Foreign: an owned, thread-safe Any a binding downcasts back to its host value. Arc keeps NodeValue Clone (the SPPF walk clones freely) and Send + Sync (no core public item is !Send/!Sync; an owned PyObject/JS handle is itself Send + Sync). Manual Debug — dyn Any is not Debug.

Tuple Fields

0: Arc<dyn Any + Send + Sync>

Implementations

impl ForeignValue

pub fn new<T: Any + Send + Sync>(value: T) -> Self

Wrap an owned host value as an opaque node payload.

pub fn downcast_ref<T: Any + Send + Sync>(&self) -> Option<&T>

Borrow the payload as T if it was created with that concrete type.

Trait Implementations

impl Clone for ForeignValue

fn clone(&self) -> ForeignValue

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ForeignValue

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

Formats the value using the given formatter.