Pattern matching negation

Question

How can I negate pattern matching in Swift?

For example I want to do something like:

guard case .wait != currentAction.type else {
    return
}

But apparently, I can't. I can do this:

    if case .wait = currentAction.type {
        return
    }

but it's less Swifty. Is there a better way?

You cannot negate a pattern, compare http://stackoverflow.com/questions/37926509/complementery-of-an-if-case. — Martin R, Jun 24 '16 at 16:01

score 1 · Accepted Answer · answered Jul 16 '16 at 12:50

1

Apparently, there is no way to do that right now as of Swift 3.

Things can change in future releases.

answered Jul 16 '16 at 12:50

s1ddok

score 1 · Answer 2 · answered Jan 07 '17 at 00:48

1

You can do this in Swift 3.0.2:

guard currentAction.type != .wait else {
    return
}

answered Jan 07 '17 at 00:48

kareman

2 Answers2