Optional

extension Optional

  • Returns the wrapped value, assuming it exists, leaving this optional empty.

    Declaration

    Swift

    public mutating func release() -> Wrapped
    Show on GitHub

  • If self is nil, wraps and returns newValue; returns the wrapped value otherwise.

    Declaration

    Swift

    public mutating func setIfNil(
  _ newValue: @autoclosure () throws -> Wrapped
) rethrows -> Wrapped
    Show on GitHub

  • Evaluates the given closure when this Optional instance is not nil, passing the unwrapped value as a parameter; returns defaultValue otherwise.

    Declaration

    Swift

    public func map<U>(
  default defaultValue: @autoclosure () -> U,
  _ transform: (Wrapped) -> U
) -> U
    Show on GitHub