Convenience Type

Types used for hosting only static members should be implemented as a caseless enum to avoid instantiation.

• Identifier: convenience_type
• Enabled by default: Disabled
• Supports autocorrection: No
• Kind: idiomatic
• Analyzer rule: No
• Minimum Swift compiler version: 4.1.0
• Default configuration: warning

Non Triggering Examples

enum Math { // enum
  public static let pi = 3.14
}

// class with inheritance
class MathViewController: UIViewController {
  public static let pi = 3.14
}

@objc class Math: NSObject { // class visible to Obj-C
  public static let pi = 3.14
}

struct Math { // type with non-static declarations
  public static let pi = 3.14
  public let randomNumber = 2
}

class DummyClass {}

Triggering Examples

↓struct Math {
  public static let pi = 3.14
}

↓class Math {
  public static let pi = 3.14
}

↓struct Math {
  public static let pi = 3.14
  @available(*, unavailable) init() {}
}