SelfDestructingCompletion

public class SelfDestructingCompletion<Param>

A class that wraps a completion block and makes sure it can only be completed once.

To be sure that the completion block is not called by someone else, you should name the variable holding the instance of this class with the same name of the completion block that was passed as a parameters.

Main usecase is for completing immediately something that is cancelled, without the need to add more logic to avoid duplicate call of the completion.

  • The underlying completion block type.

    Declaration

    Swift

    public typealias Completion = (Param) -> Void

  • Creates a new instance wrapping the given completion block.

    Declaration

    Swift

    public init(completion: @escaping Completion)

    Parameters

    completion

    The block to invoke once when complete(result:) is called.

  • Invokes the wrapped completion block with result and clears it so it cannot be called again.

    Declaration

    Swift

    public func complete(result: Param)