Explicit Self

Instance variables and functions should be explicitly accessed with ‘self.’

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

  Key	Value
  severity	warning

Non Triggering Examples

struct A {
    func f1() {}
    func f2() {
        self.f1()
    }
}

struct A {
    let p1: Int
    func f1() {
        _ = self.p1
    }
}

@propertyWrapper
struct Wrapper<Value> {
    let wrappedValue: Value
    var projectedValue: [Value] {
        [self.wrappedValue]
    }
}
struct A {
    @Wrapper var p1: Int
    func f1() {
        self.$p1
        self._p1
    }
}
func f1() {
    A(p1: 10).$p1
}

class StringInterpolation {
    let foo = "foo"

    var description: String {
        return "StringInterpolation{foo: \(self.foo)}"
    }
}

class StringInterpolationRawStringLiteral {
    let foo = "foo"

    var description: String {
        return #"StringInterpolation{foo: \#(self.foo)}"#
    }
}

class LocalStringInterpolation {
    var bar: String

    init() {
        let a = "a"
        let b = "b"
        self.bar = "\(a)\(b)".uppercased()
    }
}

class StringConcatenation {
    var description: String {
        let number = 1
        return "\(number)" + " count"
    }
}

Triggering Examples

struct A {
    func f1() {}
    func f2() {
        ↓f1()
    }
}

struct A {
    let p1: Int
    func f1() {
        _ = ↓p1
    }
}

struct A {
    func f1(a b: Int) {}
    func f2() {
        ↓f1(a: 0)
    }
}

@propertyWrapper
struct Wrapper<Value> {
    let wrappedValue: Value
    var projectedValue: [Value] {
        [self.wrappedValue]
    }
}
struct A {
    @Wrapper var p1: Int
    func f1() {
        ↓$p1
        ↓_p1
    }
}
func f1() {
    A(p1: 10).$p1
}

class StringInterpolation {
    let foo = "foo"

    var description: String {
        return "StringInterpolation{foo: \(↓foo)}"
    }
}

class StringInterpolationRawStringLiteral {
    let foo = "foo"

    var description: String {
        return #"StringInterpolation{foo: \#(↓foo)}"#
    }
}