NOT condition in 'if case' statement

Question

I have an enum:

enum E {
    case A, B, C(Int)
}

let a: E = .A

Here\'s how I would check if a equals .B

Answer 1

I saw the guard answer, and I though I could improve upon it.

Note how the do block is named. _{^{I mean, it works}}

i: do { guard case .B = a else {
    print("foo")
break i }}

Granted, this is much smaller: if case .B = a {} else { *** }

---

You can use this if you really want that ! operator

func cases(_ a: T,_ b: T) -> Bool { return a == b }
if cases(.B, a) {}
if !cases(.B, a) {}