Redundant Optional Initialization

Initializing an optional variable with nil is redundant

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

  Key	Value
  severity	warning

Non Triggering Examples

var myVar: Int?

let myVar: Int? = nil

var myVar: Int? = 0

func foo(bar: Int? = 0) { }

var myVar: Optional<Int>

let myVar: Optional<Int> = nil

var myVar: Optional<Int> = 0

var foo: Int? {
  if bar != nil { }
  return 0
}

var foo: Int? = {
  if bar != nil { }
  return 0
}()

lazy var test: Int? = nil

func funcName() {
  var myVar: String?
}

func funcName() {
  let myVar: String? = nil
}

Triggering Examples

var myVar: Int?↓ = nil

var myVar: Optional<Int>↓ = nil

var myVar: Int?↓=nil

var myVar: Optional<Int>↓=nil
)

var myVar: String?↓ = nil {
  didSet { print("didSet") }
}

func funcName() {
    var myVar: String?↓ = nil
}