vertical_whitespace_between_cases.md

Pattern: Missing empty line between switch cases

Issue: -

Description

Include a single empty line between switch cases.

Examples of correct code:

    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:
    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")
}


switch x {
case 0..<5: print("x is low")
case 5..<10: print("x is high")
default: print("x is invalid")
}


switch x {    
case 1:    
    print("one")    
    
default:    
    print("not one")    
}    

Examples of incorrect code:

    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")
    }

Further Reading

• SwiftLint - Vertical Whitespace Between Cases