// MARK: Compiles
if !true {
    print("this does not make sense")
} else if true {
    print("we double checked, and all is well")
} else {
    print("all is well")
}
 
// MARK: Does not compile

if !true {
    print("this does not make sense")
} // ----- ERROR: Expected expression
#if DEBUG
else if true {
    print("we double checked, and all is well")
}
#endif
else { // ----- ERROR: Closure expression is unused
    print("all is well")
}
 
// MARK: Workaround; compiles

if !true {
    print("this does not make sense")
} else {
    #if DEBUG
    if true {
        print("we double checked, and all is well")
    }
    #endif
    print("all is well")
}