Discouraged Optional Boolean

Prefer non-optional booleans over optional booleans

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

  Key	Value
  severity	warning

Non Triggering Examples

var foo: Bool

var foo: [String: Bool]

var foo: [Bool]

let foo: Bool = true

let foo: Bool = false

let foo: [String: Bool] = [:]

let foo: [Bool] = []

var foo: Bool { return true }

let foo: Bool { return false }()

func foo() -> Bool {}

func foo() -> [String: Bool] {}

func foo() -> ([Bool]) -> String {}

func foo(input: Bool = true) {}

func foo(input: [String: Bool] = [:]) {}

func foo(input: [Bool] = []) {}

class Foo {
    func foo() -> Bool {}
}

class Foo {
    func foo() -> [String: Bool] {}
}

class Foo {
    func foo() -> ([Bool]) -> String {}
}

struct Foo {
    func foo() -> Bool {}
}

struct Foo {
    func foo() -> [String: Bool] {}
}

struct Foo {
    func foo() -> ([Bool]) -> String {}
}

enum Foo {
    func foo() -> Bool {}
}

enum Foo {
    func foo() -> [String: Bool] {}
}

enum Foo {
    func foo() -> ([Bool]) -> String {}
}

class Foo {
    func foo(input: Bool = true) {}
}

class Foo {
    func foo(input: [String: Bool] = [:]) {}
}

class Foo {
    func foo(input: [Bool] = []) {}
}

struct Foo {
    func foo(input: Bool = true) {}
}

struct Foo {
    func foo(input: [String: Bool] = [:]) {}
}

struct Foo {
    func foo(input: [Bool] = []) {}
}

enum Foo {
    func foo(input: Bool = true) {}
}

enum Foo {
    func foo(input: [String: Bool] = [:]) {}
}

enum Foo {
    func foo(input: [Bool] = []) {}
}

Triggering Examples

var foo: ↓Bool?

var foo: [String: ↓Bool?]

var foo: [↓Bool?]

let foo: ↓Bool? = nil

let foo: [String: ↓Bool?] = [:]

let foo: [↓Bool?] = []

let foo = ↓Optional.some(false)

let foo = ↓Optional.some(true)

var foo: ↓Bool? { return nil }

let foo: ↓Bool? { return nil }()

func foo() -> ↓Bool? {}

func foo() -> [String: ↓Bool?] {}

func foo() -> [↓Bool?] {}

static func foo() -> ↓Bool? {}

static func foo() -> [String: ↓Bool?] {}

static func foo() -> [↓Bool?] {}

func foo() -> (↓Bool?) -> String {}

func foo() -> ([Int]) -> ↓Bool? {}

func foo(input: ↓Bool?) {}

func foo(input: [String: ↓Bool?]) {}

func foo(input: [↓Bool?]) {}

static func foo(input: ↓Bool?) {}

static func foo(input: [String: ↓Bool?]) {}

static func foo(input: [↓Bool?]) {}

class Foo {
    var foo: ↓Bool?
}

class Foo {
    var foo: [String: ↓Bool?]
}

class Foo {
    let foo: ↓Bool? = nil
}

class Foo {
    let foo: [String: ↓Bool?] = [:]
}

class Foo {
    let foo: [↓Bool?] = []
}

struct Foo {
    var foo: ↓Bool?
}

struct Foo {
    var foo: [String: ↓Bool?]
}

struct Foo {
    let foo: ↓Bool? = nil
}

struct Foo {
    let foo: [String: ↓Bool?] = [:]
}

struct Foo {
    let foo: [↓Bool?] = []
}

class Foo {
    var foo: ↓Bool? { return nil }
}

class Foo {
    let foo: ↓Bool? { return nil }()
}

struct Foo {
    var foo: ↓Bool? { return nil }
}

struct Foo {
    let foo: ↓Bool? { return nil }()
}

enum Foo {
    var foo: ↓Bool? { return nil }
}

enum Foo {
    let foo: ↓Bool? { return nil }()
}

class Foo {
    func foo() -> ↓Bool? {}
}

class Foo {
    func foo() -> [String: ↓Bool?] {}
}

class Foo {
    func foo() -> [↓Bool?] {}
}

class Foo {
    static func foo() -> ↓Bool? {}
}

class Foo {
    static func foo() -> [String: ↓Bool?] {}
}

class Foo {
    static func foo() -> [↓Bool?] {}
}

class Foo {
    func foo() -> (↓Bool?) -> String {}
}

class Foo {
    func foo() -> ([Int]) -> ↓Bool? {}
}

struct Foo {
    func foo() -> ↓Bool? {}
}

struct Foo {
    func foo() -> [String: ↓Bool?] {}
}

struct Foo {
    func foo() -> [↓Bool?] {}
}

struct Foo {
    static func foo() -> ↓Bool? {}
}

struct Foo {
    static func foo() -> [String: ↓Bool?] {}
}

struct Foo {
    static func foo() -> [↓Bool?] {}
}

struct Foo {
    func foo() -> (↓Bool?) -> String {}
}

struct Foo {
    func foo() -> ([Int]) -> ↓Bool? {}
}

enum Foo {
    func foo() -> ↓Bool? {}
}

enum Foo {
    func foo() -> [String: ↓Bool?] {}
}

enum Foo {
    func foo() -> [↓Bool?] {}
}

enum Foo {
    static func foo() -> ↓Bool? {}
}

enum Foo {
    static func foo() -> [String: ↓Bool?] {}
}

enum Foo {
    static func foo() -> [↓Bool?] {}
}

enum Foo {
    func foo() -> (↓Bool?) -> String {}
}

enum Foo {
    func foo() -> ([Int]) -> ↓Bool? {}
}

class Foo {
    func foo(input: ↓Bool?) {}
}

class Foo {
    func foo(input: [String: ↓Bool?]) {}
}

class Foo {
    func foo(input: [↓Bool?]) {}
}

class Foo {
    static func foo(input: ↓Bool?) {}
}

class Foo {
    static func foo(input: [String: ↓Bool?]) {}
}

class Foo {
    static func foo(input: [↓Bool?]) {}
}

struct Foo {
    func foo(input: ↓Bool?) {}
}

struct Foo {
    func foo(input: [String: ↓Bool?]) {}
}

struct Foo {
    func foo(input: [↓Bool?]) {}
}

struct Foo {
    static func foo(input: ↓Bool?) {}
}

struct Foo {
    static func foo(input: [String: ↓Bool?]) {}
}

struct Foo {
    static func foo(input: [↓Bool?]) {}
}

enum Foo {
    func foo(input: ↓Bool?) {}
}

enum Foo {
    func foo(input: [String: ↓Bool?]) {}
}

enum Foo {
    func foo(input: [↓Bool?]) {}
}

enum Foo {
    static func foo(input: ↓Bool?) {}
}

enum Foo {
    static func foo(input: [String: ↓Bool?]) {}
}

enum Foo {
    static func foo(input: [↓Bool?]) {}
}

_ = ↓Bool?.values()