Contents

next(isolation:)

Produces the next element in the map sequence.

Declaration

mutating func next(isolation actor: isolated (any Actor)?) async throws -> Transformed?

Discussion

This iterator calls next(isolation:) on its base iterator; if this call returns nil, next(isolation:) returns nil. Otherwise, next(isolation:) returns the result of calling the transforming closure on the received element. If calling the closure throws an error, the sequence ends and next(isolation:) rethrows the error.