Vertical Whitespace Between Cases

Include a single empty line between switch cases

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

  Key	Value
  severity	warning
  separation	always

Non Triggering Examples

    switch x {
    case .a:
        print("a")

    // Comment 1
    // Comment 2
    case .b:
        print("b")
    }

    switch x {
    case .a:
        print("a")
        // Comment

    case .b:
        print("b")
    }

switch (i) {
case 1: 1

#if canImport(FoundationNetworking)
default: 2
#else
case 2:
    2

case 3:
    3
#endif
}

switch x {
case .a:
    // Comment inside
    print("a")

case .b:
    print("b")
}

switch x {
case .a:
    print("a")

#if DEBUG
case .b:
    print("b")
#endif

case .c:
    print("c")
}

switch x {
case .a:
    print("a")

/* Comment */
case .b:
    print("b")
}

switch x {
case .a:
    print("a")

/// Documentation
case .b:
    print("b")
}

switch x {
case .a:
    print("a")

case .b:
    print("b")

#if DEBUG
case .c:
    print("c")
#endif

case .d:
    print("d")

case .e:
    print("e")
}

//
// separation: never
//

switch x {
case .a:
    print("a")
// Comment
case .b:
    print("b")
    // Another Comment
case .c:
    print("c")
/*
 * Comment block
 */
case .d:
    print("d")
}

//
// separation: never
//

switch x {
case .first:
    print("first")
case .second:
    print("second")
}

switch x {
case .valid:
    print("multiple ...")
    print("... lines")

case .invalid:
    print("multiple ...")
    print("... lines")
}

switch x {
case .valid:
    print("x is valid")

case .invalid:
    print("x is invalid")
}

switch x {
case 0..<5:
    print("x is valid")

default:
    print("x is invalid")
}

switch x {
case 0..<5:
    return "x is valid"

default:
    return "x is invalid"

@unknown default:
    print("x is out of this world")
}

switch x {

case 0..<5:
    print("x is low")

case 5..<10:
    print("x is high")

default:
    print("x is invalid")

@unknown default:
    print("x is out of this world")
}

switch x {
case 0..<5:
    print("x is low")

case 5..<10:
    print("x is high")

default:
    print("x is invalid")
}

switch x {
case 0..<5: print("x is low")
case 5..<10: print("x is high")
default: print("x is invalid")
@unknown default: print("x is out of this world")
}

switch x {    
case 1:    
    print("one")    

default:    
    print("not one")    
}    

switch x {
case .a: print("a")

#if DEBUG
case .b: print("b")
#endif

case .c: print("c")
}

switch x {
case .a:
    print("a")

#if DEBUG
case .b:
    print("b")
#endif

case .c:
    print("c")
}

switch x {
case .a:
    print("a")

// Comment about case b
case .b:
    print("b")
}

switch x {
case .a:
    print("a")

/* Block comment */
case .b:
    print("b")
}

switch x {
case .a:
    // Comment inside case a
    print("a")

case .b:
    print("b")
}

//
// separation: never
//

switch x {
case .a:
    print("a")
case .b:
    print("b")
case .c:
    print("c")
}

//
// separation: never
//

switch x {
case .a:
    print("a")
// Comment
case .b:
    print("b")
}

switch x {
case .a:
    print("a")

/// Documentation
case .b:
    print("b")
}

switch x {
case .gamma:
    print("gamma")


case .delta:
    print("delta")
}

Triggering Examples

    switch x {
    case .a:
        print("a")
        // Comment
    ↓case .b:
        print("b")
    }

    switch x {
    case .a:
        print("a")
    // Comment 1
    // Comment 2
    ↓case .b:
        print("b")
    }

switch (i) {
case 1: 1
↓#if canImport(FoundationNetworking)
default: 2
#else
case 2:
    2
↓case 3:
    3
#endif
}

switch x {
case .a:
    // Comment inside
    print("a")
↓case .b:
    print("b")
}

//
// separation: never
//

switch x {
case .a:
    print("a")


// Comment
↓case .b:
    print("b")
    // Another Comment


↓case .c:
    print("c")

/*
 * Comment block
 */

↓↓case .d:
    print("d")
}

switch x {
case .a:
    print("a")

#if DEBUG
case .b:
    print("b")
#endif
↓case .c:
    print("c")
}

switch x {
case .a:
    print("a")
/* Comment */
↓case .b:
    print("b")
}

switch x {
case .a:
    print("a")
/// Documentation
↓case .b:
    print("b")
}

switch x {
case .a:
    print("a")
↓case .b:
    print("b")

#if DEBUG
case .c:
    print("c")
#endif

case .d:
    print("d")
↓case .e:
    print("e")
}

//
// separation: never
//

switch x {
case .first:
    print("first")

↓case .second:
    print("second")
}

switch x {
case .valid:
    print("multiple ...")
    print("... lines")
↓case .invalid:
    print("multiple ...")
    print("... lines")
}

switch x {
case .valid:
    print("x is valid")
↓case .invalid:
    print("x is invalid")
}

switch x {
case 0..<5:
    print("x is valid")
↓default:
    print("x is invalid")
}

switch x {
case 0..<5:
    return "x is valid"
↓default:
    return "x is invalid"
↓@unknown default:
    print("x is out of this world")
}