Force Unwrapping

Force unwrapping should be avoided.

• Identifier: force_unwrapping
• Enabled by default: Disabled
• Supports autocorrection: No
• Kind: idiomatic
• Analyzer rule: No
• Minimum Swift compiler version: 3.0.0
• Default configuration: warning

Non Triggering Examples

if let url = NSURL(string: query)

navigationController?.pushViewController(viewController, animated: true)

let s as! Test

try! canThrowErrors()

let object: Any!

@IBOutlet var constraints: [NSLayoutConstraint]!

setEditing(!editing, animated: true)

navigationController.setNavigationBarHidden(!navigationController.navigationBarHidden, animated: true)

if addedToPlaylist && (!self.selectedFilters.isEmpty || self.searchBar?.text?.isEmpty == false) {}

print("\(xVar)!")

var test = (!bar)

var a: [Int]!

private var myProperty: (Void -> Void)!

func foo(_ options: [AnyHashable: Any]!) {

func foo() -> [Int]!

func foo() -> [AnyHashable: Any]!

func foo() -> [Int]! { return [] }

return self

Triggering Examples

let url = NSURL(string: query)↓!

navigationController↓!.pushViewController(viewController, animated: true)

let unwrapped = optional↓!

return cell↓!

let url = NSURL(string: "http://www.google.com")↓!

let dict = ["Boooo": "👻"]func bla() -> String { return dict["Boooo"]↓! }

let dict = ["Boooo": "👻"]func bla() -> String { return dict["Boooo"]↓!.contains("B") }

let a = dict["abc"]↓!.contains("B")

dict["abc"]↓!.bar("B")

if dict["a"]↓!!!! {

var foo: [Bool]! = dict["abc"]↓!

context("abc") {
  var foo: [Bool]! = dict["abc"]↓!
}

open var computed: String { return foo.bar↓! }

return self↓!