Implicitly Unwrapped Optional

Implicitly unwrapped optionals should be avoided when possible

• Identifier: implicitly_unwrapped_optional
• Enabled by default: No
• Supports autocorrection: No
• Kind: idiomatic
• Analyzer rule: No
• Minimum Swift compiler version: 5.0.0
• Default configuration:

  Key	Value
  severity	warning
  mode	all_except_iboutlets

Non Triggering Examples

@IBOutlet private var label: UILabel!

@IBOutlet var label: UILabel!

@IBOutlet var label: [UILabel!]

if !boolean {}

let int: Int? = 42

let int: Int? = nil

Triggering Examples

let label: ↓UILabel!

let IBOutlet: ↓UILabel!

let labels: [↓UILabel!]

var ints: [↓Int!] = [42, nil, 42]

let label: ↓IBOutlet!

let int: ↓Int! = 42

let int: ↓Int! = nil

var int: ↓Int! = 42

let collection: AnyCollection<↓Int!>

func foo(int: ↓Int!) {}

class MyClass {
    weak var bar: ↓SomeObject!
}