IdentifierKit allows you to easily replace String and Int identifier with strongly typed identifiers.

• Features
• Requirements
• Installation
• Usage
• Thanks
• License

Features

• 💪 Strongly typed identifiers
• 🐟 Full Codeable compatibility

Requirements

• iOS 8.0+
• Xcode 9.2
• Swift 4

Installation

CocoaPods

pod 'IdentifierKit'

Carthage

github "NicholasFFox/IdentifierKit"

Swift Package Manager

• Coming Soon

Usage

Use IdentifierKit to replace weakly typed String and Int identifiers in your model layer with strongly typed identifier objects.

Step 1: Create an unique type to represent your identifier - empty enums work great for this!

enum UserIdentifier: Identifier {}

Step 2: Use a typealias to give yourself syntactic sugar and avoid typing the generic syntax everywhere.

typealias UserId = IntIdentifier<UserIdentifier>

Step 3: Replace your Int (or String) identifer with your newly created type.

struct User: Codable {
  let id: UserId
  let firstName: String
  let lastName: String
}

IdentifierKit works seamlessly with the Codable protocol, so you won't have to make any changes to your existing JSON.

let json = """
{
  "id": 2,
  "firstName": "Tim",
  "lastName": "Cook"
}
""".data(using: .utf8)!

let user = try JSONDecoder().decode(User.self, from: json)

Thanks

Thanks to Daniel Steinberg for inspiring this framework with your talk on phantom types.

License

IdentifierKit is released under the MIT license. See LICENSE for details.