Optional Enum Case Match

Matching an enum case against an optional enum without ‘?’ is supported on Swift 5.1 and above

• Identifier: optional_enum_case_matching
• Enabled by default: No
• Supports autocorrection: Yes
• Kind: style
• Analyzer rule: No
• Minimum Swift compiler version: 5.1.0
• Default configuration:

  Key	Value
  severity	warning

Non Triggering Examples

switch foo {
 case .bar: break
 case .baz: break
 default: break
}

switch foo {
 case (.bar, .baz): break
 case (.bar, _): break
 case (_, .baz): break
 default: break
}

switch (x, y) {
case (.c, _?):
    break
case (.c, nil):
    break
case (_, _):
    break
}

Triggering Examples

switch foo {
 case .bar↓?: break
 case .baz: break
 default: break
}

switch foo {
 case Foo.bar↓?: break
 case .baz: break
 default: break
}

switch foo {
 case .bar↓?, .baz↓?: break
 default: break
}

switch foo {
 case .bar↓? where x > 1: break
 case .baz: break
 default: break
}

switch foo {
 case (.bar↓?, .baz↓?): break
 case (.bar↓?, _): break
 case (_, .bar↓?): break
 default: break
}