Unused Optional Binding

Prefer != nil over let _ =

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

  Key	Value
  severity	warning
  ignore_optional_try	false

Non Triggering Examples

if let bar = Foo.optionalValue {}

if let (_, second) = getOptionalTuple() {}

if let (_, asd, _) = getOptionalTuple(), let bar = Foo.optionalValue {}

if foo() { let _ = bar() }

if foo() { _ = bar() }

if case .some(_) = self {}

if let point = state.find({ _ in true }) {}

Triggering Examples

if let ↓_ = Foo.optionalValue {}

if let a = Foo.optionalValue, let ↓_ = Foo.optionalValue2 {}

guard let a = Foo.optionalValue, let ↓_ = Foo.optionalValue2 {}

if let (first, second) = getOptionalTuple(), let ↓_ = Foo.optionalValue {}

if let (first, _) = getOptionalTuple(), let ↓_ = Foo.optionalValue {}

if let (_, second) = getOptionalTuple(), let ↓_ = Foo.optionalValue {}

if let ↓(_, _, _) = getOptionalTuple(), let bar = Foo.optionalValue {}

func foo() { if let ↓_ = bar {} }