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marcelofabri/rules.md

Created January 2, 2017 00:26
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rules.md

Rules

Attributes

Identifier Enabled by default Supports autocorrection
attributes Disabled No

Attributes should be on their own lines in functions and types, but on the same line as variables and imports.

Examples

Non Triggering Examples 
@objc var x: String
@objc private var x: String
@nonobjc var x: String
@IBOutlet private var label: UILabel
@IBOutlet @objc private var label: UILabel
@NSCopying var name: NSString
@NSManaged var name: String?
@IBInspectable var cornerRadius: CGFloat
@available(iOS 9.0, *)
 let stackView: UIStackView
@NSManaged func addSomeObject(book: SomeObject)
@IBAction func buttonPressed(button: UIButton)
@objc
 @IBAction func buttonPressed(button: UIButton)
@available(iOS 9.0, *)
 func animate(view: UIStackView)
@available(iOS 9.0, *, message="A message")
 func animate(view: UIStackView)
@nonobjc
 final class X
@available(iOS 9.0, *)
 class UIStackView
@NSApplicationMain
 class AppDelegate: NSObject, NSApplicationDelegate
@UIApplicationMain
 class AppDelegate: NSObject, UIApplicationDelegate
@IBDesignable
 class MyCustomView: UIView
@testable import SourceKittenFramework
@objc(foo_x)
 var x: String
@available(iOS 9.0, *)
@objc(abc_stackView)
 let stackView: UIStackView
@objc(abc_addSomeObject:)
 @NSManaged func addSomeObject(book: SomeObject)
@objc(ABCThing)
 @available(iOS 9.0, *)
 class Thing
class Foo: NSObject {
 override var description: String { return "" }
}
class Foo: NSObject {

 override func setUp() {}
}
extension Property {

 @available(*, unavailable, renamed: "isOptional")
public var optional: Bool { fatalError() }
}
@GKInspectable var maxSpeed: Float
@discardableResult
 func a() -> Int
@objc
 @discardableResult
 func a() -> Int
func increase(f: @autoclosure () -> Int) -> Int
func foo(completionHandler: @escaping () -> Void)
Triggering Examples 
@objc
 ↓var x: String
@objc

 ↓var x: String
@objc
 private ↓var x: String
@nonobjc
 ↓var x: String
@IBOutlet
 private ↓var label: UILabel
@IBOutlet

 private ↓var label: UILabel
@NSCopying
 ↓var name: NSString
@NSManaged
 ↓var name: String?
@IBInspectable
 ↓var cornerRadius: CGFloat
@available(iOS 9.0, *) ↓let stackView: UIStackView
@NSManaged
 ↓func addSomeObject(book: SomeObject)
@IBAction
 ↓func buttonPressed(button: UIButton)
@IBAction
 @objc
 ↓func buttonPressed(button: UIButton)
@available(iOS 9.0, *) ↓func animate(view: UIStackView)
@nonobjc final ↓class X
@available(iOS 9.0, *) ↓class UIStackView
@available(iOS 9.0, *)
 @objc ↓class UIStackView
@available(iOS 9.0, *) @objc
 ↓class UIStackView
@available(iOS 9.0, *)

 ↓class UIStackView
@UIApplicationMain ↓class AppDelegate: NSObject, UIApplicationDelegate
@IBDesignable ↓class MyCustomView: UIView
@testable
↓import SourceKittenFramework
@testable


↓import SourceKittenFramework
@objc(foo_x) ↓var x: String
@available(iOS 9.0, *) @objc(abc_stackView)
 ↓let stackView: UIStackView
@objc(abc_addSomeObject:) @NSManaged
 ↓func addSomeObject(book: SomeObject)
@objc(abc_addSomeObject:)
 @NSManaged
 ↓func addSomeObject(book: SomeObject)
@available(iOS 9.0, *)
 @objc(ABCThing) ↓class Thing
@GKInspectable
 ↓var maxSpeed: Float
@discardableResult ↓func a() -> Int
@objc
 @discardableResult ↓func a() -> Int
@objc

 @discardableResult
 ↓func a() -> Int

Class Delegate Protocol

Identifier Enabled by default Supports autocorrection
class_delegate_protocol Enabled No

Delegate protocols should be class-only so they can be weakly referenced.

Examples

Non Triggering Examples 
protocol FooDelegate: class {}
protocol FooDelegate: class, BarDelegate {}
protocol Foo {}
class FooDelegate {}
@objc protocol FooDelegate {}
@objc(MyFooDelegate)
 protocol FooDelegate {}
protocol FooDelegate: BarDelegate {}
Triggering Examples 
↓protocol FooDelegate {}
↓protocol FooDelegate: Bar {}

Closing Brace Spacing

Identifier Enabled by default Supports autocorrection
closing_brace Enabled Yes

Closing brace with closing parenthesis should not have any whitespaces in the middle.

Examples

Non Triggering Examples 
[].map({ })
[].map(
  { }
)
Triggering Examples 
[].map({ ↓} )
[].map({ ↓}	)

Closure End Indentation

Identifier Enabled by default Supports autocorrection
closure_end_indentation Disabled No

Closure end should have the same indentation as the line that started it.

Examples

Non Triggering Examples 
SignalProducer(values: [1, 2, 3])
   .startWithNext { number in
       print(number)
   }
[1, 2].map { $0 + 1 }
return matchPattern(pattern, withSyntaxKinds: [.comment]).flatMap { range in
   return Command(string: contents, range: range)
}.flatMap { command in
   return command.expand()
}
Triggering Examples 
SignalProducer(values: [1, 2, 3])
   .startWithNext { number in
       print(number)
↓}
return matchPattern(pattern, withSyntaxKinds: [.comment]).flatMap { range in
   return Command(string: contents, range: range)
   ↓}.flatMap { command in
   return command.expand()
↓}

Closure Parameter Position

Identifier Enabled by default Supports autocorrection
closure_parameter_position Enabled No

Closure parameters should be on the same line as opening brace.

Examples

Non Triggering Examples 
[1, 2].map { $0 + 1 }
[1, 2].map({ $0 + 1 })
[1, 2].map { number in
 number + 1 
}
[1, 2].map { number -> Int in
 number + 1 
}
[1, 2].map { (number: Int) -> Int in
 number + 1 
}
[1, 2].map { [weak self] number in
 number + 1 
}
[1, 2].something(closure: { number in
 number + 1 
})
let isEmpty = [1, 2].isEmpty()
rlmConfiguration.migrationBlock.map { rlmMigration in
return { migration, schemaVersion in
rlmMigration(migration.rlmMigration, schemaVersion)
}
}
let mediaView: UIView = { [weak self] index in
   return UIView()
}(index)
Triggering Examples 
[1, 2].map {
 ↓number in
 number + 1 
}
[1, 2].map {
 ↓number -> Int in
 number + 1 
}
[1, 2].map {
 (↓number: Int) -> Int in
 number + 1 
}
[1, 2].map {
 [weak self] ↓number in
 number + 1 
}
[1, 2].map { [weak self]
 ↓number in
 number + 1 
}
[1, 2].map({
 ↓number in
 number + 1 
})
[1, 2].something(closure: {
 ↓number in
 number + 1 
})
[1, 2].reduce(0) {
 ↓sum, ↓number in
 number + sum 
}

Closure Spacing

Identifier Enabled by default Supports autocorrection
closure_spacing Disabled No

Closure expressions should have a single space inside each brace.

Examples

Non Triggering Examples 
[].map ({ $0.description })
[].filter { $0.contains(location) }
extension UITableViewCell: ReusableView { }
extension UITableViewCell: ReusableView {}
Triggering Examples 
[].filter(↓{$0.contains(location)})
[].map(↓{$0})

Colon

Identifier Enabled by default Supports autocorrection
colon Enabled Yes

Colons should be next to the identifier when specifying a type and next to the key in dictionary literals.

Examples

Non Triggering Examples 
let abc: Void
let abc: [Void: Void]
let abc: (Void, Void)
let abc: ([Void], String, Int)
let abc: [([Void], String, Int)]
let abc: String="def"
let abc: Int=0
let abc: Enum=Enum.Value
func abc(def: Void) {}
func abc(def: Void, ghi: Void) {}
// 周斌佳年周斌佳
let abc: String = "abc:"
let abc = [Void: Void]()
let abc = [1: [3: 2], 3: 4]
let abc = ["string": "string"]
let abc = ["string:string": "string"]
Triggering Examples 
let ↓abc:Void
let ↓abc:  Void
let ↓abc :Void
let ↓abc : Void
let ↓abc : [Void: Void]
let ↓abc : (Void, String, Int)
let ↓abc : ([Void], String, Int)
let ↓abc : [([Void], String, Int)]
let ↓abc:  (Void, String, Int)
let ↓abc:  ([Void], String, Int)
let ↓abc:  [([Void], String, Int)]
let ↓abc :String="def"
let ↓abc :Int=0
let ↓abc :Int = 0
let ↓abc:Int=0
let ↓abc:Int = 0
let ↓abc:Enum=Enum.Value
func abc(↓def:Void) {}
func abc(↓def:  Void) {}
func abc(↓def :Void) {}
func abc(↓def : Void) {}
func abc(def: Void, ↓ghi :Void) {}
let abc = [Void↓:Void]()
let abc = [Void↓ : Void]()
let abc = [Void↓:  Void]()
let abc = [Void↓ :  Void]()
let abc = [1: [3↓ : 2], 3: 4]
let abc = [1: [3↓ : 2], 3↓:  4]

Comma Spacing

Identifier Enabled by default Supports autocorrection
comma Enabled Yes

There should be no space before and one after any comma.

Examples

Non Triggering Examples 
func abc(a: String, b: String) { }
abc(a: "string", b: "string"
enum a { case a, b, c }
func abc(
  a: String,  // comment
  bcd: String // comment
) {
}
func abc(
  a: String,
  bcd: String
) {
}
Triggering Examples 
func abc(a: String↓ ,b: String) { }
func abc(a: String↓ ,b: String↓ ,c: String↓ ,d: String) { }
abc(a: "string"↓,b: "string"
enum a { case a↓ ,b }
let result = plus(
    first: 3↓ , // #683
    second: 4
)

Conditional Returns on Newline

Identifier Enabled by default Supports autocorrection
conditional_returns_on_newline Disabled No

Conditional statements should always return on the next line

Examples

Non Triggering Examples 
guard true else {
 return true
}
guard true,
 let x = true else {
 return true
}
if true else {
 return true
}
if true,
 let x = true else {
 return true
}
if textField.returnKeyType == .Next {
if true { // return }
/*if true { */ return }
Triggering Examples 
↓guard true else { return }
↓if true { return }
↓if true { break } else { return }
↓if true { break } else {       return }
↓if true { return "YES" } else { return "NO" }

Control Statement

Identifier Enabled by default Supports autocorrection
control_statement Enabled No

if,for,while,do statements shouldn't wrap their conditionals in parentheses.

Examples

Non Triggering Examples 
if condition {
if (a, b) == (0, 1) {
if (a || b) && (c || d) {
if (min...max).contains(value) {
if renderGif(data) {
renderGif(data)
for item in collection {
for (key, value) in dictionary {
for (index, value) in enumerate(array) {
for var index = 0; index < 42; index++ {
guard condition else {
while condition {
} while condition {
do { ; } while condition {
switch foo {
Triggering Examples 
↓if (condition) {
↓if(condition) {
↓if ((a || b) && (c || d)) {
↓if ((min...max).contains(value)) {
↓for (item in collection) {
↓for (var index = 0; index < 42; index++) {
↓for(item in collection) {
↓for(var index = 0; index < 42; index++) {
↓guard (condition) else {
↓while (condition) {
↓while(condition) {
} ↓while (condition) {
} ↓while(condition) {
do { ; } ↓while(condition) {
do { ; } ↓while (condition) {
↓switch (foo) {

Custom Rules

Identifier Enabled by default Supports autocorrection
custom_rules Enabled No

Create custom rules by providing a regex string. Optionally specify what syntax kinds to match against, the severity level, and what message to display.

Cyclomatic Complexity

Identifier Enabled by default Supports autocorrection
cyclomatic_complexity Enabled No

Complexity of function bodies should be limited.

Examples

Non Triggering Examples 
func f1() {
if true {
for _ in 1..5 { } }
if false { }
}
func f(code: Int) -> Int {switch code {
 case 0: fallthrough
case 0: return 1
case 0: return 1
case 0: return 1
case 0: return 1
case 0: return 1
case 0: return 1
case 0: return 1
case 0: return 1
default: return 1}}
func f1() {if true {}; if true {}; if true {}; if true {}; if true {}; if true {}
func f2() {
if true {}; if true {}; if true {}; if true {}; if true {}
}}
Triggering Examples 
↓func f1() {
  if true {
    if true {
      if false {}
    }
  }
  if false {}
  let i = 0

  switch i {
  case 1: break
  case 2: break
  case 3: break
  case 4: break
 default: break
  }
  for _ in 1...5 {
    guard true else {
      return
    }
  }
}

Dynamic Inline

Identifier Enabled by default Supports autocorrection
dynamic_inline Enabled No

avoid using 'dynamic' and '@inline(__always)' together.

Examples

Non Triggering Examples 
class C {
dynamic func f() {}}
class C {
@inline(__always) func f() {}}
class C {
@inline(never) dynamic func f() {}}
Triggering Examples 
class C {
@inline(__always) dynamic ↓func f() {}
}
class C {
@inline(__always) public dynamic ↓func f() {}
}
class C {
@inline(__always) dynamic internal ↓func f() {}
}
class C {
@inline(__always)
dynamic ↓func f() {}
}
class C {
@inline(__always)
dynamic
↓func f() {}
}

Empty Count

Identifier Enabled by default Supports autocorrection
empty_count Disabled No

Prefer checking isEmpty over comparing count to zero.

Examples

Non Triggering Examples 
var count = 0
[Int]().isEmpty
[Int]().count > 1
[Int]().count == 1
Triggering Examples 
[Int]().↓count == 0
[Int]().↓count > 0
[Int]().↓count != 0

Empty Parameters

Identifier Enabled by default Supports autocorrection
empty_parameters Enabled Yes

Prefer () -> over Void -> .

Examples

Non Triggering Examples 
let abc: () -> Void = {}
func foo(completion: () -> Void)
func foo(completion: () thows -> Void)
let foo: (ConfigurationTests) -> Void throws -> Void)
let foo: (ConfigurationTests) ->   Void throws -> Void)
let foo: (ConfigurationTests) ->Void throws -> Void)
Triggering Examples 
let abc: ↓Void -> Void = {}
func foo(completion: ↓Void -> Void)
func foo(completion: ↓Void throws -> Void)
let foo: ↓Void -> () throws -> Void)

Empty Parentheses with Trailing Closure

Identifier Enabled by default Supports autocorrection
empty_parentheses_with_trailing_closure Enabled Yes

When using trailing closures, empty parentheses should be avoided after the method call.

Examples

Non Triggering Examples 
[1, 2].map { $0 + 1 }
[1, 2].map({ $0 + 1 })
[1, 2].reduce(0) { $0 + $1 }
[1, 2].map { number in
 number + 1 
}
let isEmpty = [1, 2].isEmpty()
UIView.animateWithDuration(0.3, animations: {
   self.disableInteractionRightView.alpha = 0
}, completion: { _ in
   ()
})
Triggering Examples 
[1, 2].map↓() { $0 + 1 }
[1, 2].map↓( ) { $0 + 1 }
[1, 2].map↓() { number in
 number + 1 
}
[1, 2].map↓(  ) { number in
 number + 1 
}

Explicit Init

Identifier Enabled by default Supports autocorrection
explicit_init Disabled Yes

Explicitly calling .init() should be avoided.

Examples

Non Triggering Examples 
import Foundation; class C: NSObject { override init() { super.init() }}
struct S { let n: Int }; extension S { init() { self.init(n: 1) } }
[1].flatMap(String.init)
[String.self].map { $0.init(1) }
[String.self].map { type in type.init(1) }
Triggering Examples 
[1].flatMap{String↓.init($0)}
[String.self].map { Type in Type↓.init(1) }

File Header

Identifier Enabled by default Supports autocorrection
file_header Disabled No

Files should have consistent header comments.

Examples

Non Triggering Examples 
let foo = "Copyright"
let foo = 2 // Copyright
let foo = 2
 // Copyright
Triggering Examples 
// ↓Copyright
//
// ↓Copyright
//
//  FileHeaderRule.swift
//  SwiftLint
//
//  Created by Marcelo Fabri on 27/11/16.
//  ↓Copyright © 2016 Realm. All rights reserved.
//

File Line Length

Identifier Enabled by default Supports autocorrection
file_length Enabled No

Files should not span too many lines.

Examples

Non Triggering Examples 
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Triggering Examples 
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First Where

Identifier Enabled by default Supports autocorrection
first_where Disabled No

Prefer using .first(where:) over .filter { }.first in collections.

Examples

Non Triggering Examples 
kinds.filter(excludingKinds.contains).isEmpty && kinds.first == .identifier
myList.first(where: { $0 % 2 == 0 })
matchPattern(pattern).filter { $0.first == .identifier }
Triggering Examples 
↓myList.filter { $0 % 2 == 0 }.first
↓myList.filter({ $0 % 2 == 0 }).first
↓myList.map { $0 + 1 }.filter({ $0 % 2 == 0 }).first
↓myList.map { $0 + 1 }.filter({ $0 % 2 == 0 }).first?.something()
↓myList.filter(someFunction).first

Force Cast

Identifier Enabled by default Supports autocorrection
force_cast Enabled No

Force casts should be avoided.

Examples

Non Triggering Examples 
NSNumber() as? Int
Triggering Examples 
NSNumber() ↓as! Int

Force Try

Identifier Enabled by default Supports autocorrection
force_try Enabled No

Force tries should be avoided.

Examples

Non Triggering Examples 
func a() throws {}; do { try a() } catch {}
Triggering Examples 
func a() throws {}; ↓try! a()

Force Unwrapping

Identifier Enabled by default Supports autocorrection
force_unwrapping Disabled No

Force unwrapping should be avoided.

Examples

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)!")
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"]↓! }

Function Body Length

Identifier Enabled by default Supports autocorrection
function_body_length Enabled No

Functions bodies should not span too many lines.

Function Parameter Count

Identifier Enabled by default Supports autocorrection
function_parameter_count Enabled No

Number of function parameters should be low.

Examples

Non Triggering Examples 
init(a: Int, b: Int, c: Int, d: Int, e: Int, f: Int) {}
init (a: Int, b: Int, c: Int, d: Int, e: Int, f: Int) {}
`init`(a: Int, b: Int, c: Int, d: Int, e: Int, f: Int) {}
init?(a: Int, b: Int, c: Int, d: Int, e: Int, f: Int) {}
init?<T>(a: T, b: Int, c: Int, d: Int, e: Int, f: Int) {}
init?<T: String>(a: T, b: Int, c: Int, d: Int, e: Int, f: Int) {}
func f2(p1: Int, p2: Int) { }
func f(a: Int, b: Int, c: Int, d: Int, x: Int = 42) {}
func f(a: [Int], b: Int, c: Int, d: Int, f: Int) -> [Int] {
let s = a.flatMap { $0 as? [String: Int] } ?? []}}
Triggering Examples 
↓func f(a: Int, b: Int, c: Int, d: Int, e: Int, f: Int) {}
↓func initialValue(a: Int, b: Int, c: Int, d: Int, e: Int, f: Int) {}
↓func f(a: Int, b: Int, c: Int, d: Int, e: Int, f: Int = 2, g: Int) {}
struct Foo {
init(a: Int, b: Int, c: Int, d: Int, e: Int, f: Int) {}
↓func bar(a: Int, b: Int, c: Int, d: Int, e: Int, f: Int) {}}

Implicit Getter

Identifier Enabled by default Supports autocorrection
implicit_getter Enabled No

Computed read-only properties should avoid using the get keyword.

Examples

Non Triggering Examples 
class Foo {
  var foo: Int {
 get {
 return 3
}
 set {
 _abc = newValue 
}
}
}
class Foo {
  var foo: Int {
 return 20 
} 
}
}
class Foo {
  static var foo: Int {
 return 20 
} 
}
}
class Foo {
  static foo: Int {
 get {
 return 3
}
 set {
 _abc = newValue 
}
}
}
class Foo {
  var foo: Int
}
class Foo {
  var foo: Int {
 return getValueFromDisk() 
} 
}
}
class Foo {
  var foo: String {
 return "get" 
} 
}
}
protocol Foo {
 var foo: Int { get }


protocol Foo {
 var foo: Int { get set }


class Foo {
  var foo: Int {
    struct Bar {
      var bar: Int {
        get { return 1 }
        set { _ = newValue }
      }
    }
    return Bar().bar
  }
}
Triggering Examples 
class Foo {
  var foo: Int {
 ↓get {
 return 20 
} 
} 
}
}
class Foo {
  var foo: Int {
 ↓get{
 return 20 
} 
} 
}
}
class Foo {
  static var foo: Int {
 ↓get {
 return 20 
} 
} 
}
}

Large Tuple

Identifier Enabled by default Supports autocorrection
large_tuple Enabled No

Tuples shouldn't have many members. Create a custom type instead.

Examples

Non Triggering Examples 
let foo: (Int, Int)
let foo: (start: Int, end: Int)
let foo: (Int, (Int, String))
func foo() -> (Int, Int)
func foo() -> (Int, Int) {}
func foo(bar: String) -> (Int, Int)
func foo(bar: String) -> (Int, Int) {}
func foo() throws -> (Int, Int)
func foo() throws -> (Int, Int) {}
let foo: (Int, Int, Int) -> Void
Triggering Examples 
↓let foo: (Int, Int, Int)
↓let foo: (start: Int, end: Int, value: String)
↓let foo: (Int, (Int, Int, Int))
func foo(↓bar: (Int, Int, Int))
func foo() -> ↓(Int, Int, Int)
func foo() -> ↓(Int, Int, Int) {}
func foo(bar: String) -> ↓(Int, Int, Int)
func foo(bar: String) -> ↓(Int, Int, Int) {}
func foo() throws -> ↓(Int, Int, Int)
func foo() throws -> ↓(Int, Int, Int) {}
func foo() throws -> ↓(Int, ↓(String, String, String), Int) {}

Leading Whitespace

Identifier Enabled by default Supports autocorrection
leading_whitespace Enabled Yes

Files should not contain leading whitespace.

Examples

Non Triggering Examples 
//
Triggering Examples 


 //




Legacy CGGeometry Functions






Identifier
Enabled by default
Supports autocorrection






legacy_cggeometry_functions
Enabled
Yes






Struct extension properties and methods are preferred over legacy functions


Examples



Non Triggering Examples

rect.width


rect.height


rect.minX


rect.midX


rect.maxX


rect.minY


rect.midY


rect.maxY


rect.isNull


rect.isEmpty


rect.isInfinite


rect.standardized


rect.integral


rect.insetBy(dx: 5.0, dy: -7.0)


rect.offsetBy(dx: 5.0, dy: -7.0)


rect1.union(rect2)


rect1.intersect(rect2)


rect1.contains(rect2)


rect.contains(point)


rect1.intersects(rect2)





Triggering Examples

↓CGRectGetWidth(rect)


↓CGRectGetHeight(rect)


↓CGRectGetMinX(rect)


↓CGRectGetMidX(rect)


↓CGRectGetMaxX(rect)


↓CGRectGetMinY(rect)


↓CGRectGetMidY(rect)


↓CGRectGetMaxY(rect)


↓CGRectIsNull(rect)


↓CGRectIsEmpty(rect)


↓CGRectIsInfinite(rect)


↓CGRectStandardize(rect)


↓CGRectIntegral(rect)


↓CGRectInset(rect, 10, 5)


↓CGRectOffset(rect, -2, 8.3)


↓CGRectUnion(rect1, rect2)


↓CGRectIntersection(rect1, rect2)


↓CGRectContainsRect(rect1, rect2)


↓CGRectContainsPoint(rect, point)


↓CGRectIntersectsRect(rect1, rect2)




Legacy Constant






Identifier
Enabled by default
Supports autocorrection






legacy_constant
Enabled
Yes






Struct-scoped constants are preferred over legacy global constants.


Examples



Non Triggering Examples

CGRect.infinite


CGPoint.zero


CGRect.zero


CGSize.zero


NSPoint.zero


NSRect.zero


NSSize.zero


CGRect.null





Triggering Examples

↓CGRectInfinite


↓CGPointZero


↓CGRectZero


↓CGSizeZero


↓NSZeroPoint


↓NSZeroRect


↓NSZeroSize


↓CGRectNull




Legacy Constructor






Identifier
Enabled by default
Supports autocorrection






legacy_constructor
Enabled
Yes






Swift constructors are preferred over legacy convenience functions.


Examples



Non Triggering Examples

CGPoint(x: 10, y: 10)


CGPoint(x: xValue, y: yValue)


CGSize(width: 10, height: 10)


CGSize(width: aWidth, height: aHeight)


CGRect(x: 0, y: 0, width: 10, height: 10)


CGRect(x: xVal, y: yVal, width: aWidth, height: aHeight)


CGVector(dx: 10, dy: 10)


CGVector(dx: deltaX, dy: deltaY)


NSPoint(x: 10, y: 10)


NSPoint(x: xValue, y: yValue)


NSSize(width: 10, height: 10)


NSSize(width: aWidth, height: aHeight)


NSRect(x: 0, y: 0, width: 10, height: 10)


NSRect(x: xVal, y: yVal, width: aWidth, height: aHeight)


NSRange(location: 10, length: 1)


NSRange(location: loc, length: len)


UIEdgeInsets(top: 0, left: 0, bottom: 10, right: 10)


UIEdgeInsets(top: aTop, left: aLeft, bottom: aBottom, right: aRight)


NSEdgeInsets(top: 0, left: 0, bottom: 10, right: 10)


NSEdgeInsets(top: aTop, left: aLeft, bottom: aBottom, right: aRight)





Triggering Examples

↓CGPointMake(10, 10)


↓CGPointMake(xVal, yVal)


↓CGSizeMake(10, 10)


↓CGSizeMake(aWidth, aHeight)


↓CGRectMake(0, 0, 10, 10)


↓CGRectMake(xVal, yVal, width, height)


↓CGVectorMake(10, 10)


↓CGVectorMake(deltaX, deltaY)


↓NSMakePoint(10, 10)


↓NSMakePoint(xVal, yVal)


↓NSMakeSize(10, 10)


↓NSMakeSize(aWidth, aHeight)


↓NSMakeRect(0, 0, 10, 10)


↓NSMakeRect(xVal, yVal, width, height)


↓NSMakeRange(10, 1)


↓NSMakeRange(loc, len)


↓UIEdgeInsetsMake(0, 0, 10, 10)


↓UIEdgeInsetsMake(top, left, bottom, right)


↓NSEdgeInsetsMake(0, 0, 10, 10)


↓NSEdgeInsetsMake(top, left, bottom, right)




Legacy NSGeometry Functions






Identifier
Enabled by default
Supports autocorrection






legacy_nsgeometry_functions
Enabled
Yes






Struct extension properties and methods are preferred over legacy functions


Examples



Non Triggering Examples

rect.width


rect.height


rect.minX


rect.midX


rect.maxX


rect.minY


rect.midY


rect.maxY


rect.isEmpty


rect.integral


rect.insetBy(dx: 5.0, dy: -7.0)


rect.offsetBy(dx: 5.0, dy: -7.0)


rect1.union(rect2)


rect1.intersect(rect2)


rect1.contains(rect2)


rect.contains(point)


rect1.intersects(rect2)





Triggering Examples

↓NSWidth(rect)


↓NSHeight(rect)


↓NSMinX(rect)


↓NSMidX(rect)


↓NSMaxX(rect)


↓NSMinY(rect)


↓NSMidY(rect)


↓NSMaxY(rect)


↓NSEqualRects(rect1, rect2)


↓NSEqualSizes(size1, size2)


↓NSEqualPoints(point1, point2)


↓NSEdgeInsetsEqual(insets2, insets2)


↓NSIsEmptyRect(rect)


↓NSIntegralRect(rect)


↓NSInsetRect(rect, 10, 5)


↓NSOffsetRect(rect, -2, 8.3)


↓NSUnionRect(rect1, rect2)


↓NSIntersectionRect(rect1, rect2)


↓NSContainsRect(rect1, rect2)


↓NSPointInRect(rect, point)


↓NSIntersectsRect(rect1, rect2)




Line Length






Identifier
Enabled by default
Supports autocorrection






line_length
Enabled
No






Lines should not span too many characters.


Examples



Non Triggering Examples

////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////


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Triggering Examples

/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////


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#imageLiteral(resourceName: "image.jpg")#imageLiteral(resourceName: "image.jpg")#imageLiteral(resourceName: "image.jpg")#imageLiteral(resourceName: "image.jpg")#imageLiteral(resourceName: "image.jpg")#imageLiteral(resourceName: "image.jpg")#imageLiteral(resourceName: "image.jpg")#imageLiteral(resourceName: "image.jpg")#imageLiteral(resourceName: "image.jpg")#imageLiteral(resourceName: "image.jpg")#imageLiteral(resourceName: "image.jpg")#imageLiteral(resourceName: "image.jpg")#imageLiteral(resourceName: "image.jpg")#imageLiteral(resourceName: "image.jpg")#imageLiteral(resourceName: "image.jpg")#imageLiteral(resourceName: "image.jpg")#imageLiteral(resourceName: "image.jpg")#imageLiteral(resourceName: "image.jpg")#imageLiteral(resourceName: "image.jpg")#imageLiteral(resourceName: "image.jpg")#imageLiteral(resourceName: "image.jpg")#imageLiteral(resourceName: "image.jpg")#imageLiteral(resourceName: "image.jpg")#imageLiteral(resourceName: "image.jpg")#imageLiteral(resourceName: "image.jpg")#imageLiteral(resourceName: "image.jpg")#imageLiteral(resourceName: "image.jpg")#imageLiteral(resourceName: "image.jpg")#imageLiteral(resourceName: "image.jpg")#imageLiteral(resourceName: "image.jpg")#imageLiteral(resourceName: "image.jpg")#imageLiteral(resourceName: "image.jpg")#imageLiteral(resourceName: "image.jpg")#imageLiteral(resourceName: "image.jpg")#imageLiteral(resourceName: "image.jpg")#imageLiteral(resourceName: "image.jpg")#imageLiteral(resourceName: "image.jpg")#imageLiteral(resourceName: "image.jpg")#imageLiteral(resourceName: "image.jpg")#imageLiteral(resourceName: "image.jpg")#imageLiteral(resourceName: "image.jpg")#imageLiteral(resourceName: "image.jpg")#imageLiteral(resourceName: "image.jpg")#imageLiteral(resourceName: "image.jpg")#imageLiteral(resourceName: "image.jpg")#imageLiteral(resourceName: "image.jpg")#imageLiteral(resourceName: "image.jpg")#imageLiteral(resourceName: "image.jpg")#imageLiteral(resourceName: "image.jpg")#imageLiteral(resourceName: "image.jpg")#imageLiteral(resourceName: "image.jpg")#imageLiteral(resourceName: "image.jpg")#imageLiteral(resourceName: "image.jpg")#imageLiteral(resourceName: "image.jpg")#imageLiteral(resourceName: "image.jpg")#imageLiteral(resourceName: "image.jpg")#imageLiteral(resourceName: "image.jpg")#imageLiteral(resourceName: "image.jpg")#imageLiteral(resourceName: "image.jpg")#imageLiteral(resourceName: "image.jpg")#imageLiteral(resourceName: "image.jpg")#imageLiteral(resourceName: "image.jpg")#imageLiteral(resourceName: "image.jpg")#imageLiteral(resourceName: "image.jpg")#imageLiteral(resourceName: "image.jpg")#imageLiteral(resourceName: "image.jpg")#imageLiteral(resourceName: "image.jpg")#imageLiteral(resourceName: "image.jpg")#imageLiteral(resourceName: "image.jpg")#imageLiteral(resourceName: "image.jpg")#imageLiteral(resourceName: "image.jpg")#imageLiteral(resourceName: "image.jpg")#imageLiteral(resourceName: "image.jpg")#imageLiteral(resourceName: "image.jpg")#imageLiteral(resourceName: "image.jpg")#imageLiteral(resourceName: "image.jpg")#imageLiteral(resourceName: "image.jpg")#imageLiteral(resourceName: "image.jpg")#imageLiteral(resourceName: "image.jpg")#imageLiteral(resourceName: "image.jpg")#imageLiteral(resourceName: "image.jpg")#imageLiteral(resourceName: "image.jpg")#imageLiteral(resourceName: "image.jpg")#imageLiteral(resourceName: "image.jpg")#imageLiteral(resourceName: "image.jpg")#imageLiteral(resourceName: "image.jpg")#imageLiteral(resourceName: "image.jpg")#imageLiteral(resourceName: "image.jpg")#imageLiteral(resourceName: "image.jpg")#imageLiteral(resourceName: "image.jpg")#imageLiteral(resourceName: "image.jpg")#imageLiteral(resourceName: "image.jpg")#imageLiteral(resourceName: "image.jpg")#imageLiteral(resourceName: "image.jpg")#imageLiteral(resourceName: "image.jpg")#imageLiteral(resourceName: "image.jpg")#imageLiteral(resourceName: "image.jpg")#imageLiteral(resourceName: "image.jpg")#imageLiteral(resourceName: "image.jpg")#imageLiteral(resourceName: "image.jpg")#imageLiteral(resourceName: "image.jpg")#imageLiteral(resourceName: "image.jpg")#imageLiteral(resourceName: "image.jpg")#imageLiteral(resourceName: "image.jpg")#imageLiteral(resourceName: "image.jpg")#imageLiteral(resourceName: "image.jpg")#imageLiteral(resourceName: "image.jpg")#imageLiteral(resourceName: "image.jpg")#imageLiteral(resourceName: "image.jpg")#imageLiteral(resourceName: "image.jpg")#imageLiteral(resourceName: "image.jpg")#imageLiteral(resourceName: "image.jpg")#imageLiteral(resourceName: "image.jpg")#imageLiteral(resourceName: "image.jpg")#imageLiteral(resourceName: "image.jpg")#imageLiteral(resourceName: "image.jpg")#imageLiteral(resourceName: "image.jpg")#imageLiteral(resourceName: "image.jpg")#imageLiteral(resourceName: "image.jpg")#imageLiteral(resourceName: "image.jpg")#imageLiteral(resourceName: "image.jpg")




Mark






Identifier
Enabled by default
Supports autocorrection






mark
Enabled
Yes






MARK comment should be in valid format.


Examples



Non Triggering Examples

// MARK: good


// MARK: - good


// MARK: -





Triggering Examples

↓//MARK: bad


↓// MARK:bad


↓//MARK:bad


↓//  MARK: bad


↓// MARK:  bad


↓// MARK: -bad


↓// MARK:- bad


↓// MARK:-bad


↓//MARK: - bad


↓//MARK:- bad


↓//MARK: -bad


↓//MARK:-bad




Missing Docs






Identifier
Enabled by default
Supports autocorrection






missing_docs
Disabled
No






Public declarations should be documented.


Examples



Non Triggering Examples

/// docs
public func a() {}


/** docs */
public func a() {}


func a() {}


internal func a() {}


private func a() {}


// regular comment
func a() {}


/* regular comment */
func a() {}


/// docs
public protocol A {
/// docs
var b: Int { get } }
/// docs
public struct C: A {
public let b: Int
}


/// docs
public class A {
/// docs
public func b() {}
}
/// docs
public class B: A { override public func b() {} }


import Foundation
/// docs
public class B: NSObject {
// no docs
override public var description: String { fatalError() } }





Triggering Examples

public func a() {}


// regular comment
public func a() {}


/* regular comment */
public func a() {}


/// docs
public protocol A {
// no docs
var b: Int { get } }
/// docs
public struct C: A {

public let b: Int
}




Nesting






Identifier
Enabled by default
Supports autocorrection






nesting
Enabled
No






Types should be nested at most 1 level deep, and statements should be nested at most 5 levels deep.


Examples



Non Triggering Examples

class Class0 { class Class1 {} }


func func0() {
func func1() {
func func2() {
func func3() {
func func4() { func func5() {
}
}
}
}
}
}


struct Class0 { struct Class1 {} }


func func0() {
func func1() {
func func2() {
func func3() {
func func4() { func func5() {
}
}
}
}
}
}


enum Class0 { enum Class1 {} }


func func0() {
func func1() {
func func2() {
func func3() {
func func4() { func func5() {
}
}
}
}
}
}


enum Enum0 { enum Enum1 { case Case } }





Triggering Examples

class A { class B { ↓class C {} } }


struct A { struct B { ↓struct C {} } }


enum A { enum B { ↓enum C {} } }


func func0() {
func func1() {
func func2() {
func func3() {
func func4() { func func5() {
↓func func6() {
}
}
}
}
}
}
}




Nimble Operator






Identifier
Enabled by default
Supports autocorrection






nimble_operator
Disabled
No






Prefer Nimble operator overloads over free matcher functions.


Examples



Non Triggering Examples

expect(seagull.squawk) != "Hi!"


expect("Hi!") == "Hi!"


expect(10) > 2


expect(10) >= 10


expect(10) < 11


expect(10) <= 10


expect(x) === x


expect(10) == 10


expect(object.asyncFunction()).toEventually(equal(1))


expect(actual).to(haveCount(expected))





Triggering Examples

↓expect(seagull.squawk).toNot(equal("Hi"))


↓expect(12).toNot(equal(10))


↓expect(10).to(equal(10))


↓expect(10).to(beGreaterThan(8))


↓expect(10).to(beGreaterThanOrEqualTo(10))


↓expect(10).to(beLessThan(11))


↓expect(10).to(beLessThanOrEqualTo(10))


↓expect(x).to(beIdenticalTo(x))


expect(10) > 2
 ↓expect(10).to(beGreaterThan(2))




Number Separator






Identifier
Enabled by default
Supports autocorrection






number_separator
Disabled
Yes






Underscores should be used as thousand separator in large decimal numbers.


Examples



Non Triggering Examples

let foo = -100


let foo = -1_000


let foo = -1_000_000


let foo = -1.000_1


let foo = -1_000_000.000_000_1


let binary = -0b10000


let binary = -0b1000_0001


let hex = -0xA


let hex = -0xAA_BB


let octal = -0o21


let octal = -0o21_1


let exp = -1_000_000.000_000e2


let foo = +100


let foo = +1_000


let foo = +1_000_000


let foo = +1.000_1


let foo = +1_000_000.000_000_1


let binary = +0b10000


let binary = +0b1000_0001


let hex = +0xA


let hex = +0xAA_BB


let octal = +0o21


let octal = +0o21_1


let exp = +1_000_000.000_000e2


let foo = 100


let foo = 1_000


let foo = 1_000_000


let foo = 1.000_1


let foo = 1_000_000.000_000_1


let binary = 0b10000


let binary = 0b1000_0001


let hex = 0xA


let hex = 0xAA_BB


let octal = 0o21


let octal = 0o21_1


let exp = 1_000_000.000_000e2





Triggering Examples

let foo = ↓-10_0


let foo = ↓-1000


let foo = ↓-1000e2


let foo = ↓-1__000


let foo = ↓-1.0001


let foo = ↓-1_000_000.000000_1


let foo = ↓-1000000.000000_1


let foo = +↓10_0


let foo = +↓1000


let foo = +↓1000e2


let foo = +↓1__000


let foo = +↓1.0001


let foo = +↓1_000_000.000000_1


let foo = +↓1000000.000000_1


let foo = ↓10_0


let foo = ↓1000


let foo = ↓1000e2


let foo = ↓1__000


let foo = ↓1.0001


let foo = ↓1_000_000.000000_1


let foo = ↓1000000.000000_1




Object Literal






Identifier
Enabled by default
Supports autocorrection






object_literal
Disabled
No






Prefer object literals over image and color inits.


Examples



Non Triggering Examples

let image = #imageLiteral(resourceName: "image.jpg")


let color = #colorLiteral(red: 0.9607843161, green: 0.7058823705, blue: 0.200000003, alpha: 1)


let image = UIImage(named: aVariable)


let image = UIImage(named: "interpolated \(variable)")


let color = UIColor(red: value, green: value, blue: value, alpha: 1)


let image = NSImage(named: aVariable)


let image = NSImage(named: "interpolated \(variable)")


let color = NSColor(red: value, green: value, blue: value, alpha: 1)





Triggering Examples

let image = ↓UIImage(named: "foo")


let color = ↓UIColor(red: 0.3, green: 0.3, blue: 0.3, alpha: 1)


let color = ↓UIColor(red: 100 / 255.0, green: 50 / 255.0, blue: 0, alpha: 1)


let color = ↓UIColor(white: 0.5, alpha: 1)


let image = ↓NSImage(named: "foo")


let color = ↓NSColor(red: 0.3, green: 0.3, blue: 0.3, alpha: 1)


let color = ↓NSColor(red: 100 / 255.0, green: 50 / 255.0, blue: 0, alpha: 1)


let color = ↓NSColor(white: 0.5, alpha: 1)


let image = ↓UIImage.init(named: "foo")


let color = ↓UIColor.init(red: 0.3, green: 0.3, blue: 0.3, alpha: 1)


let color = ↓UIColor.init(red: 100 / 255.0, green: 50 / 255.0, blue: 0, alpha: 1)


let color = ↓UIColor.init(white: 0.5, alpha: 1)


let image = ↓NSImage.init(named: "foo")


let color = ↓NSColor.init(red: 0.3, green: 0.3, blue: 0.3, alpha: 1)


let color = ↓NSColor.init(red: 100 / 255.0, green: 50 / 255.0, blue: 0, alpha: 1)


let color = ↓NSColor.init(white: 0.5, alpha: 1)




Opening Brace Spacing






Identifier
Enabled by default
Supports autocorrection






opening_brace
Enabled
Yes






Opening braces should be preceded by a single space and on the same line as the declaration.


Examples



Non Triggering Examples

func abc() {
}


[].map() { $0 }


[].map({ })


if let a = b { }


while a == b { }


guard let a = b else { }


if
	let a = b,
	let c = d
	where a == c
{ }


while
	let a = b,
	let c = d
	where a == c
{ }


guard
	let a = b,
	let c = d
	where a == c else
{ }





Triggering Examples

func abc(↓){
}


func abc()↓
	{ }


[].map(↓){ $0 }


[].map↓( { } )


if let a = b{ }


while a == b{ }


guard let a = b else{ }


if
	let a = b,
	let c = d
	where a == c{ }


while
	let a = b,
	let c = d
	where a == c{ }


guard
	let a = b,
	let c = d
	where a == c else{ }




Operator Usage Whitespace






Identifier
Enabled by default
Supports autocorrection






operator_usage_whitespace
Disabled
Yes






Operators should be surrounded by a single whitespace when they are being used.


Examples



Non Triggering Examples

let foo = 1 + 2


let foo = 1 > 2


let foo = !false


let foo: Int?


let foo: Array<String>


let foo: [String]


let foo = 1 + 
  2


let range = 1...3


let range = 1 ... 3


let range = 1..<3


#if swift(>=3.0)


array.removeAtIndex(-200)


let name = "image-1"


button.setImage(#imageLiteral(resourceName: "image-1"), for: .normal)





Triggering Examples

let foo = 1↓+2


let foo = 1↓   + 2


let foo = 1↓   +    2


let foo = 1↓ +    2


let foo↓=1↓+2


let foo↓=1 + 2


let foo↓=bar


let range = 1↓ ..<  3


let foo = bar↓   ?? 0


let foo = bar↓??0


let foo = bar↓ !=  0


let foo = bar↓ !==  bar2


let v8 = Int8(1)↓  << 6


let v8 = 1↓ <<  (6)


let v8 = 1↓ <<  (6)
 let foo = 1 > 2




Operator Function Whitespace






Identifier
Enabled by default
Supports autocorrection






operator_whitespace
Enabled
No






Operators should be surrounded by a single whitespace when defining them.


Examples



Non Triggering Examples

func <| (lhs: Int, rhs: Int) -> Int {}


func <|< <A>(lhs: A, rhs: A) -> A {}


func abc(lhs: Int, rhs: Int) -> Int {}





Triggering Examples

↓func <|(lhs: Int, rhs: Int) -> Int {}


↓func <|<<A>(lhs: A, rhs: A) -> A {}


↓func <|  (lhs: Int, rhs: Int) -> Int {}


↓func <|<  <A>(lhs: A, rhs: A) -> A {}


↓func  <| (lhs: Int, rhs: Int) -> Int {}


↓func  <|< <A>(lhs: A, rhs: A) -> A {}




Overridden methods call super






Identifier
Enabled by default
Supports autocorrection






overridden_super_call
Disabled
No






Some overridden methods should always call super


Examples



Non Triggering Examples

class VC: UIViewController {
	override func viewWillAppear(_ animated: Bool) {
		super.viewWillAppear(animated)
	}
}


class VC: UIViewController {
	override func viewWillAppear(_ animated: Bool) {
		self.method1()
		super.viewWillAppear(animated)
		self.method2()
	}
}


class VC: UIViewController {
	override func loadView() {
	}
}


class Some {
	func viewWillAppear(_ animated: Bool) {
	}
}





Triggering Examples

class VC: UIViewController {
	override func viewWillAppear(_ animated: Bool) ↓{
		//Not calling to super
		self.method()
	}
}


class VC: UIViewController {
	override func viewWillAppear(_ animated: Bool) ↓{
		super.viewWillAppear(animated)
		//Other code
		super.viewWillAppear(animated)
	}
}


class VC: UIViewController {
	override func didReceiveMemoryWarning() ↓{
	}
}




Private Outlets






Identifier
Enabled by default
Supports autocorrection






private_outlet
Disabled
No






IBOutlets should be private to avoid leaking UIKit to higher layers.


Examples



Non Triggering Examples

class Foo {
  @IBOutlet private var label: UILabel?
}


class Foo {
  @IBOutlet private var label: UILabel!
}


class Foo {
  var notAnOutlet: UILabel
}


class Foo {
  @IBOutlet weak private var label: UILabel?
}


class Foo {
  @IBOutlet private weak var label: UILabel?
}





Triggering Examples

class Foo {
  @IBOutlet ↓var label: UILabel?
}


class Foo {
  @IBOutlet ↓var label: UILabel!
}




Private Unit Test






Identifier
Enabled by default
Supports autocorrection






private_unit_test
Enabled
No






Unit tests marked private are silently skipped.


Examples



Non Triggering Examples

class FooTest: XCTestCase { func test1() {}
 internal func test2() {}
 public func test3() {}
 }


internal class FooTest: XCTestCase { func test1() {}
 internal func test2() {}
 public func test3() {}
 }


public class FooTest: XCTestCase { func test1() {}
 internal func test2() {}
 public func test3() {}
 }


private class Foo: NSObject { func test1() {}
 internal func test2() {}
 public func test3() {}
 }


private class Foo { func test1() {}
 internal func test2() {}
 public func test3() {}
 }





Triggering Examples

private ↓class FooTest: XCTestCase { func test1() {}
 internal func test2() {}
 public func test3() {}
 private func test4() {}
 }


class FooTest: XCTestCase { func test1() {}
 internal func test2() {}
 public func test3() {}
 private ↓func test4() {}
 }


internal class FooTest: XCTestCase { func test1() {}
 internal func test2() {}
 public func test3() {}
 private ↓func test4() {}
 }


public class FooTest: XCTestCase { func test1() {}
 internal func test2() {}
 public func test3() {}
 private ↓func test4() {}
 }




Prohibited calls to super






Identifier
Enabled by default
Supports autocorrection






prohibited_super_call
Disabled
No






Some methods should not call super


Examples



Non Triggering Examples

class VC: UIViewController {
	override func loadView() {
	}
}


class NSView {
	func updateLayer() {
		self.method1()	}
}





Triggering Examples

class VC: UIViewController {
	override func loadView() ↓{
		super.loadView()
	}
}


class VC: NSFileProviderExtension {
	override func providePlaceholder(at url: URL,completionHandler: @escaping (Error?) -> Void) ↓{
		self.method1()
		super.providePlaceholder(at:url, completionHandler: completionHandler)
	}
}


class VC: NSView {
	override func updateLayer() ↓{
		self.method1()
		super.updateLayer()
		self.method2()
	}
}




Redundant Nil Coalescing






Identifier
Enabled by default
Supports autocorrection






redundant_nil_coalescing
Disabled
Yes






nil coalescing operator is only evaluated if the lhs is nil , coalescing operator with nil as rhs is redundant


Examples



Non Triggering Examples

var myVar: Int?; myVar ?? 0





Triggering Examples

var myVar: Int? = nil; myVar↓ ?? nil


var myVar: Int? = nil; myVar↓??nil




Redundant Optional Initialization






Identifier
Enabled by default
Supports autocorrection






redundant_optional_initialization
Enabled
Yes






Initializing an optional variable with nil is redundant.


Examples



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





Triggering Examples

var myVar: Int?↓ = nil


var myVar: Optional<Int>↓ = nil


var myVar: Int?↓=nil


var myVar: Optional<Int>↓=nil




Redudant String Enum Value






Identifier
Enabled by default
Supports autocorrection






redundant_string_enum_value
Enabled
No






String enum values can be omitted when they are equal to the enumcase name.


Examples



Non Triggering Examples

enum Numbers: String {
 case one
 case two
}


enum Numbers: Int {
 case one = 1
 case two = 2
}


enum Numbers: String {
 case one = "ONE"
 case two = "TWO"
}


enum Numbers: String {
 case one = "ONE"
 case two = "two"
}


enum Numbers: String {
 case one, two
}





Triggering Examples

enum Numbers: String {
 case one = ↓"one"
 case two = ↓"two"
}


enum Numbers: String {
 case one = ↓"one", two = ↓"two"
}


enum Numbers: String {
 case one, two = ↓"two"
}




Redundant Void Return






Identifier
Enabled by default
Supports autocorrection






redundant_void_return
Enabled
Yes






Returning Void in a function declaration is redundant.


Examples



Non Triggering Examples

func foo() {}


func foo() -> Int {}


func foo() -> Int -> Void {}


let foo: Int -> Void


func foo() -> Int -> () {}


let foo: Int -> ()





Triggering Examples

func foo()↓ -> Void {}


protocol Foo {
 func foo()↓ -> Void
}


func foo()↓ -> () {}


protocol Foo {
 func foo()↓ -> ()
}




Returning Whitespace






Identifier
Enabled by default
Supports autocorrection






return_arrow_whitespace
Enabled
Yes






Return arrow and return type should be separated by a single space or on a separate line.


Examples



Non Triggering Examples

func abc() -> Int {}


func abc() -> [Int] {}


func abc() -> (Int, Int) {}


var abc = {(param: Int) -> Void in }


func abc() ->
    Int {}


func abc()
    -> Int {}





Triggering Examples

func abc()↓->Int {}


func abc()↓->[Int] {}


func abc()↓->(Int, Int) {}


func abc()↓-> Int {}


func abc()↓ ->Int {}


func abc()↓  ->  Int {}


var abc = {(param: Int)↓ ->Bool in }


var abc = {(param: Int)↓->Bool in }




Sorted Imports






Identifier
Enabled by default
Supports autocorrection






sorted_imports
Disabled
No






Imports should be sorted.


Examples



Non Triggering Examples

import AAA
import BBB
import CCC
import DDD





Triggering Examples

import AAA
import ZZZ
import ↓BBB
import CCC




Statement Position






Identifier
Enabled by default
Supports autocorrection






statement_position
Enabled
Yes






Else and catch should be on the same line, one space after the previous declaration.


Examples



Non Triggering Examples

} else if {


} else {


} catch {


"}else{"


struct A { let catchphrase: Int }
let a = A(
 catchphrase: 0
)


struct A { let `catch`: Int }
let a = A(
 `catch`: 0
)





Triggering Examples

↓}else if {


↓}  else {


↓}
catch {


↓}
	  catch {




Switch Case on Newline






Identifier
Enabled by default
Supports autocorrection






switch_case_on_newline
Disabled
No






Cases inside a switch should always be on a newline


Examples



Non Triggering Examples

case 1:
 return true


default:
 return true


case let value:
 return true


/*case 1: */return true


//case 1:
 return true


let x = [caseKey: value]


let x = [key: .default]


if case let .someEnum(value) = aFunction([key: 2]) {


guard case let .someEnum(value) = aFunction([key: 2]) {


for case let .someEnum(value) = aFunction([key: 2]) {


case .myCase: // error from network


case let .myCase(value) where value > 10:
 return false


enum Environment {
 case development
}


enum Environment {
 case development(url: URL)
}


enum Environment {
 case development(url: URL) // staging
}


case #selector(aFunction(_:)):
 return false





Triggering Examples

↓case 1: return true


↓case let value: return true


↓default: return true


↓case "a string": return false


↓case .myCase: return false // error from network


↓case let .myCase(value) where value > 10: return false


↓case #selector(aFunction(_:)): return false




Syntactic Sugar






Identifier
Enabled by default
Supports autocorrection






syntactic_sugar
Enabled
No






Shorthand syntactic sugar should be used, i.e. [Int] instead of Array


Examples



Non Triggering Examples

let x: [Int]


let x: [Int: String]


let x: Int?


func x(a: [Int], b: Int) -> [Int: Any]


let x: Int!


extension Array { 
 func x() { } 
 }


extension Dictionary { 
 func x() { } 
 }


let x: CustomArray<String>


var currentIndex: Array<OnboardingPage>.Index?


func x(a: [Int], b: Int) -> Array<Int>.Index


unsafeBitCast(nonOptionalT, to: Optional<T>.self)


type is Optional<String>.Type





Triggering Examples

let x: ↓Array<String>


let x: ↓Dictionary<Int, String>


let x: ↓Optional<Int>


let x: ↓ImplicitlyUnwrappedOptional<Int>


func x(a: ↓Array<Int>, b: Int) -> [Int: Any]


func x(a: [Int], b: Int) -> ↓Dictionary<Int, String>


func x(a: ↓Array<Int>, b: Int) -> ↓Dictionary<Int, String>


let x = ↓Array<String>.array(of: object)




Todo






Identifier
Enabled by default
Supports autocorrection






todo
Enabled
No






TODOs and FIXMEs should be avoided.


Examples



Non Triggering Examples

// notaTODO:


// notaFIXME:





Triggering Examples

// ↓TODO:


// ↓FIXME:


// ↓TODO(note)


// ↓FIXME(note)


/* ↓FIXME: */


/* ↓TODO: */


/** ↓FIXME: */


/** ↓TODO: */




Trailing Comma






Identifier
Enabled by default
Supports autocorrection






trailing_comma
Enabled
No






Trailing commas in arrays and dictionaries should be avoided/enforced.


Examples



Non Triggering Examples

let foo = [1, 2, 3]


let foo = []


let foo = [:]


let foo = [1: 2, 2: 3]


let foo = [Void]()


let example = [ 1,
 2
 // 3,
]





Triggering Examples

let foo = [1, 2, 3↓,]


let foo = [1, 2, 3↓, ]


let foo = [1, 2, 3   ↓,]


let foo = [1: 2, 2: 3↓, ]


struct Bar {
 let foo = [1: 2, 2: 3↓, ]
}


let foo = [1, 2, 3↓,] + [4, 5, 6↓,]


let example = [ 1,
2↓,
 // 3,
]




Trailing Newline






Identifier
Enabled by default
Supports autocorrection






trailing_newline
Enabled
Yes






Files should have a single trailing newline.


Examples



Non Triggering Examples

let a = 0





Triggering Examples

let a = 0


let a = 0





Trailing Semicolon






Identifier
Enabled by default
Supports autocorrection






trailing_semicolon
Enabled
Yes






Lines should not have trailing semicolons.


Examples



Non Triggering Examples

let a = 0





Triggering Examples

let a = 0↓;


let a = 0↓;
let b = 1


let a = 0↓;;


let a = 0↓;    ;;


let a = 0↓; ; ;




Trailing Whitespace






Identifier
Enabled by default
Supports autocorrection






trailing_whitespace
Enabled
Yes






Lines should not have trailing whitespace.


Examples



Non Triggering Examples

let name: String


//


// 


let name: String //


let name: String // 





Triggering Examples

let name: String 


/* */ let name: String 




Type Body Length






Identifier
Enabled by default
Supports autocorrection






type_body_length
Enabled
No






Type bodies should not span too many lines.


Examples



Non Triggering Examples

class Abc {
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
}


class Abc {









































































































































































































}


class Abc {
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
}


class Abc {
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0

/* this is
a multiline comment
*/
}


struct Abc {
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
}


struct Abc {









































































































































































































}


struct Abc {
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
}


struct Abc {
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0

/* this is
a multiline comment
*/
}


enum Abc {
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
}


enum Abc {









































































































































































































}


enum Abc {
// this is a comment
// this is a comment
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// this is a comment
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// this is a comment
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// this is a comment
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// this is a comment
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// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
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// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
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// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
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// this is a comment
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// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
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// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
// this is a comment
}


enum Abc {
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0

/* this is
a multiline comment
*/
}





Triggering Examples

↓class Abc {
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
}


↓struct Abc {
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
}


↓enum Abc {
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
let abc = 0
}




Type Name






Identifier
Enabled by default
Supports autocorrection






type_name
Enabled
No






Type name should only contain alphanumeric characters, start with an uppercase character and span between 3 and 40 characters in length.


Examples



Non Triggering Examples

class MyType {}


private class _MyType {}


class AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA {}


struct MyType {}


private struct _MyType {}


struct AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA {}


enum MyType {}


private enum _MyType {}


enum AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA {}


typealias Foo = Void


private typealias Foo = Void


protocol Foo {
 associatedtype Bar
 }


protocol Foo {
 associatedtype Bar: Equatable
 }


enum MyType {
case value
}





Triggering Examples

↓class myType {}


↓class _MyType {}


private ↓class MyType_ {}


↓class My {}


↓class AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA {}


↓struct myType {}


↓struct _MyType {}


private ↓struct MyType_ {}


↓struct My {}


↓struct AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA {}


↓enum myType {}


↓enum _MyType {}


private ↓enum MyType_ {}


↓enum My {}


↓enum AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA {}


typealias ↓X = Void


private typealias ↓Foo_Bar = Void


private typealias ↓foo = Void


typealias ↓AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA = Void


protocol Foo {
 associatedtype ↓X
 }


protocol Foo {
 associatedtype ↓Foo_Bar: Equatable
 }


protocol Foo {
 associatedtype ↓AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
 }




Unused Closure Parameter






Identifier
Enabled by default
Supports autocorrection






unused_closure_parameter
Enabled
Yes






Unused parameter in a closure should be replaced with _.


Examples



Non Triggering Examples

[1, 2].map { $0 + 1 }


[1, 2].map({ $0 + 1 })


[1, 2].map { number in
 number + 1 
}


[1, 2].map { _ in
 3 
}


[1, 2].something { number, idx in
 return number * idx
}


let isEmpty = [1, 2].isEmpty()


violations.sorted(by: { lhs, rhs in 
 return lhs.location > rhs.location
})


rlmConfiguration.migrationBlock.map { rlmMigration in
return { migration, schemaVersion in
rlmMigration(migration.rlmMigration, schemaVersion)
}
}





Triggering Examples

[1, 2].map { ↓number in
 return 3
}


[1, 2].map { ↓number in
 return numberWithSuffix
}


[1, 2].map { ↓number in
 return 3 // number
}


[1, 2].map { ↓number in
 return 3 "number"
}


[1, 2].something { number, ↓idx in
 return number
}




Unused Enumerated






Identifier
Enabled by default
Supports autocorrection






unused_enumerated
Enabled
No






When the index is not used, .enumerated() can be removed.


Examples



Non Triggering Examples

for (idx, foo) in bar.enumerated() { }


for (_, foo) in bar.enumerated().something() { }


for (_, foo) in bar.something() { }


for foo in bar.enumerated() { }


for foo in bar { }


for (idx, _) in bar.enumerated() { }





Triggering Examples

for (↓_, foo) in bar.enumerated() { }


for (↓_, foo) in abc.bar.enumerated() { }


for (↓_, foo) in abc.something().enumerated() { }




Valid Docs






Identifier
Enabled by default
Supports autocorrection






valid_docs
Enabled
No






Documented declarations should be valid.


Examples



Non Triggering Examples

/// docs
public func a() {}


/// docs
/// - parameter param: this is void
public func a(param: Void) {}


/// docs
/// - parameter label: this is void
public func a(label param: Void) {}


/// docs
/// - parameter param: this is void
public func a(label param: Void) {}


/// docs
/// - Parameter param: this is void
public func a(label param: Void) {}


/// docs
/// - returns: false
public func no() -> Bool { return false }


/// docs
/// - Returns: false
public func no() -> Bool { return false }


/// Returns false
public func no() -> Bool { return false }


/// Returns false
var no: Bool { return false }


/// docs
var no: Bool { return false }


/// docs
/// - throws: NSError
func a() throws {}


/// docs
/// - Throws: NSError
func a() throws {}


/// docs
/// - parameter param: this is void
/// - returns: false
public func no(param: (Void -> Void)?) -> Bool { return false }


/// docs
/// - parameter param: this is void
///- parameter param2: this is void too
/// - returns: false


public func no(param: (Void -> Void)?, param2: String->Void) -> Bool {return false}


/// docs
/// - parameter param: this is void
public func no(param: (Void -> Void)?) {}


/// docs
/// - parameter param: this is void
///- parameter param2: this is void too
public func no(param: (Void -> Void)?, param2: String->Void) {}


/// docs👨‍👩‍👧‍👧
/// - returns: false
public func no() -> Bool { return false }


/// docs
/// - returns: tuple
public func no() -> (Int, Int) {return (1, 2)}


/// docs
/// - returns: closure
public func no() -> (Void->Void) {}


/// docs
/// - parameter param: this is void
/// - parameter param2: this is void too
func no(param: (Void) -> Void, onError param2: ((NSError) -> Void)? = nil) {}


/// docs
/// - parameter param: this is a void closure
/// - parameter param2: this is a void closure too
/// - parameter param3: this is a void closure too
func a(param: () -> Void, param2: (parameter: Int) -> Void, param3: (parameter: Int) -> Void) {}


/// docs
/// - parameter param: this is a void closure
/// - Parameter param2: this is a void closure too
/// - Parameter param3: this is a void closure too
func a(param: () -> Void, param2: (parameter: Int) -> Void, param3: (parameter: Int) -> Void) {}


/// docs
/// - parameter param: this is a void closure
/// - returns: Foo<Void>
func a(param: () -> Void) -> Foo<Void> {return Foo<Void>}


/// docs
/// - parameter param: this is a void closure
/// - returns: Foo<Void>
func a(param: () -> Void) -> Foo<[Int]> {return Foo<[Int]>}


/// docs
/// - throws: NSError
/// - returns: false
func a() throws -> Bool { return true }


/// docs
/// - parameter param: this is a closure
/// - returns: Bool
func a(param: (Void throws -> Bool)) -> Bool { return true }





Triggering Examples

/// docs
public ↓func a(param: Void) {}


/// docs
/// - parameter invalid: this is void
public ↓func a(param: Void) {}


/// docs
/// - parameter invalid: this is void
public ↓func a(label param: Void) {}


/// docs
/// - parameter invalid: this is void
public ↓func a() {}


/// docs
public ↓func no() -> Bool { return false }


/// Returns false
public ↓func a() {}


/// docs
/// - throws: NSError
↓func a() {}


/// docs
↓func a() throws {}


/// docs
/// - parameter param: this is void
public ↓func no(param: (Void -> Void)?) -> Bool { return false }


/// docs
/// - parameter param: this is void
///- parameter param2: this is void too
public ↓func no(param: (Void -> Void)?, param2: String->Void) -> Bool {return false}


/// docs
/// - parameter param: this is void
/// - returns: false
public ↓func no(param: (Void -> Void)?) {}


/// docs
/// - parameter param: this is void
///- parameter param2: this is void too
/// - returns: false
public ↓func no(param: (Void -> Void)?, param2: String->Void) {}


/// docs
public func no() -> (Int, Int) {return (1, 2)}


/// docs
/// - parameter param: this is void
///- parameter param2: this is void too
///- returns: closure
func no(param: (Void) -> Void, onError param2: ((NSError) -> Void)? = nil) {}


/// docs
/// - parameter param: this is a void closure
func a(param: () -> Void) -> Foo<Void> {return Foo<Void>}


/// docs
/// - parameter param: this is a void closure
func a(param: () -> Void) -> Foo<[Int]> {return Foo<[Int]>}


/// docs
func a() throws -> Bool { return true }




Valid IBInspectable






Identifier
Enabled by default
Supports autocorrection






valid_ibinspectable
Enabled
No






@IBInspectable should be applied to variables only, have its type explicit and be of a supported type


Examples



Non Triggering Examples

class Foo {
  @IBInspectable private var x: Int
}


class Foo {
  @IBInspectable private var x: String?
}


class Foo {
  @IBInspectable private var x: String!
}


class Foo {
  @IBInspectable private var count: Int = 0
}


class Foo {
  private var notInspectable = 0
}


class Foo {
  private let notInspectable: Int
}





Triggering Examples

class Foo {
  @IBInspectable private ↓let count: Int
}


class Foo {
  @IBInspectable private ↓var insets: UIEdgeInsets
}


class Foo {
  @IBInspectable private ↓var count = 0
}


class Foo {
  @IBInspectable private ↓var count: Int?
}


class Foo {
  @IBInspectable private ↓var count: Int!
}


class Foo {
  @IBInspectable private ↓var x: ImplicitlyUnwrappedOptional<Int>
}


class Foo {
  @IBInspectable private ↓var count: Optional<Int>
}


class Foo {
  @IBInspectable private ↓var x: Optional<String>
}


class Foo {
  @IBInspectable private ↓var x: ImplicitlyUnwrappedOptional<String>
}




Variable Name






Identifier
Enabled by default
Supports autocorrection






variable_name
Enabled
No






Variable names should only contain alphanumeric characters and start with a lowercase character or should only contain capital letters. In an exception to the above, variable names may start with a capital letter when they are declared static and immutable. Variable names should not be too long or too short.


Examples



Non Triggering Examples

let myLet = 0


var myVar = 0


private let _myLet = 0


class Abc { static let MyLet = 0 }


let URL: NSURL? = nil


let XMLString: String? = nil





Triggering Examples

↓let MyLet = 0


↓let _myLet = 0


private ↓let myLet_ = 0


↓let myExtremelyVeryVeryVeryVeryVeryVeryLongLet = 0


↓var myExtremelyVeryVeryVeryVeryVeryVeryLongVar = 0


private ↓let _myExtremelyVeryVeryVeryVeryVeryVeryLongLet = 0


↓let i = 0


↓var id = 0


private ↓let _i = 0




Vertical Parameter Alignment






Identifier
Enabled by default
Supports autocorrection






vertical_parameter_alignment
Enabled
No






Function parameters should be aligned vertically if they're in multiple lines in a declaration.


Examples



Non Triggering Examples

func validateFunction(_ file: File, kind: SwiftDeclarationKind,
                      dictionary: [String: SourceKitRepresentable]) { }


func validateFunction(_ file: File, kind: SwiftDeclarationKind,
                      dictionary: [String: SourceKitRepresentable]) -> [StyleViolation]


func foo(bar: Int)


func foo(bar: Int) -> String 


func validateFunction(_ file: File, kind: SwiftDeclarationKind,
                      dictionary: [String: SourceKitRepresentable])
                      -> [StyleViolation]


func validateFunction(
   _ file: File, kind: SwiftDeclarationKind,
   dictionary: [String: SourceKitRepresentable]) -> [StyleViolation]


func validateFunction(
   _ file: File, kind: SwiftDeclarationKind,
   dictionary: [String: SourceKitRepresentable]
) -> [StyleViolation]





Triggering Examples

func validateFunction(_ file: File, kind: SwiftDeclarationKind,
                  ↓dictionary: [String: SourceKitRepresentable]) { }


func validateFunction(_ file: File, kind: SwiftDeclarationKind,
                       ↓dictionary: [String: SourceKitRepresentable]) { }


func validateFunction(_ file: File,
                  ↓kind: SwiftDeclarationKind,
                  ↓dictionary: [String: SourceKitRepresentable]) { }




Vertical Whitespace






Identifier
Enabled by default
Supports autocorrection






vertical_whitespace
Enabled
Yes






Limit vertical whitespace to a single empty line.


Examples



Non Triggering Examples

let abc = 0


let abc = 0



/* bcs 



*/


// bca 






Triggering Examples

let aaaa = 0




struct AAAA {}





class BBBB {}






Void Return






Identifier
Enabled by default
Supports autocorrection






void_return
Enabled
Yes






Prefer -> Void over -> ().


Examples



Non Triggering Examples

let abc: () -> Void = {}


func foo(completion: () -> Void)


let foo: (ConfigurationTests) -> () throws -> Void)


let foo: (ConfigurationTests) ->   () throws -> Void)


let foo: (ConfigurationTests) ->() throws -> Void)


let foo: (ConfigurationTests) -> () -> Void)





Triggering Examples

let abc: () -> ↓() = {}


func foo(completion: () -> ↓())


func foo(completion: () -> ↓(   ))


let foo: (ConfigurationTests) -> () throws -> ↓())




Weak Delegate






Identifier
Enabled by default
Supports autocorrection






weak_delegate
Enabled
No






Delegates should be weak to avoid reference cycles.


Examples



Non Triggering Examples

class Foo {
  weak var delegate: SomeProtocol?
}


class Foo {
  weak var someDelegate: SomeDelegateProtocol?
}


class Foo {
  weak var delegateScroll: ScrollDelegate?
}


class Foo {
  var scrollHandler: ScrollDelegate?
}


func foo() {
  var delegate: SomeDelegate
}


class Foo {
  var delegateNotified: Bool?
}


protocol P {
 var delegate: AnyObject? { get set }
}


class Foo {
 protocol P {
 var delegate: AnyObject? { get set }
}
}


class Foo {
 var computedDelegate: ComputedDelegate {
 return bar() 
} 
}





Triggering Examples

class Foo {
  ↓var delegate: SomeProtocol?
}


class Foo {
  ↓var scrollDelegate: ScrollDelegate?
}





  


  





      
      

        

          

            









          


          

            

  
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