Type Alias SequenceProducer 

pub type SequenceProducer = Arc<dyn Fn(&mut Cx, usize) -> Result<Option<Value>> + Send + Sync + 'static>;

Element generator backing a LazySequence.

Called with the zero-based index of the next element; returns Some(value) to yield it or None to signal exhaustion.

Aliased Type

pub struct SequenceProducer { /* private fields */ }