[swift-users] Checking for a specific enum case and value

[Ryan Lovelett]

This is what I would do.

On Tue, Dec 29, 2015, at 06:37 AM, Kristof Liliom via swift-users wrote:
> Hi,
> 
> What is the best way to do a one line check for an enum with a specific
> inner value? Example:
> 
> enum State {
> 	case Running, Stopped(Int32)
> }
> 
> func stoppedSuccessfully(state: State) -> Bool {
> 	return state == .Stopped(0) // So only return true if state is .Stopped and the inner value is 0
> }

func stoppedSuccessfully(state: State) -> Bool {
    if case let State.Stopped(value) = state where value == 0 {
        return true
    } else {
        return false
    }
}

stoppedSuccessfully(.Running) // false
stoppedSuccessfully(.Stopped(0)) // true
stoppedSuccessfully(.Stopped(100)) // false

> 
> Thank You,
> Chris
> 
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