Failable 1.4.1

Failable 1.4.1

LangLanguage SwiftSwift
License MIT
ReleasedLast Release Nov 2018
SPMSupports SPM

Maintained by Arthur Ariel Sabintsev, Tyler Davis, Andrew Schoenfeld.

Failable 1.4.1

  • By
  • The Washington Post


Either monad to simplify data in completion blocks

Heavily influenced by Fallible by brentdax and Result of Alamofire. Failable data is generic and can return item(s) or if failed an optional ErrorType.


  • iOS 8.0+ / Mac OS X 10.9+ / tvOS 9.0+ / watchOS 2.0+
  • Xcode 7.3+


Embedded frameworks require a minimum deployment target of iOS 8 or OS X Mavericks (10.9).


CocoaPods is a dependency manager for Cocoa projects. You can install it with the following command:

$ gem install cocoapods

CocoaPods 0.39.0+ is required.

To integrate Failable into your Xcode project using CocoaPods, specify it in your Podfile:

source ''
platform :ios, '9.0'

pod 'Failable', '~> 0.2.0'

Then, run the following command:

$ pod install

Example Usage

func example(completion: ((data: Failable<String>) -> Void)?) {
    completion?(data: .Success("hello"))

example { (data) in
	if let value = data.value {