TipKit vs. Swift 6 + Concurrency

@dmcgloin Thanks for flagging that. Could you please file a bug report and post the FB number here once you do. Please be sure to test on future beta releases as well.

Submitted bug report: FB13946094

FYI: Also posted question to Stack Overflow here: https://stackoverflow.com/questions/78630356/tipkit-parameters-incompatible-with-swift-6-concurrency-property-is-not-concurr

I am experiencing this issue as well. It appears to happen if the Tip resides in a framework. Here's my own feedback: FB14037329

@dmcgloin Thank you for flagging this, we should have the macro expansion updated soon, in the interm you can write the manual expansion of the @Parameter macro and include nonisolated(unsafe) as a workaround.

struct ParameterRuleTip: Tip {
    // Define the app state you want to track.
static var isLoggedIn: Bool = false {
        get {
            $isLoggedIn.wrappedValue
        }
        set {
            $isLoggedIn.wrappedValue = newValue
        }
    }

    static nonisolated(unsafe) var $isLoggedIn: Tips.Parameter<Bool> = Tips.Parameter(Self.self, "+isLoggedIn", true)

TipKit handles thread safety for Parameter's internally so marking it as nonisolated(unsafe) is totally okay!

Thanks. Glad to know that a solution is on the way. FWIW, I tried to use the suggested workaround and got the following compile errors:

"Variable with getter/setter cannot have an initial value" (for setting isLoggedIn to false). I can remove this initialization. But then I get this error:

"Cannot declare entity named '$isLoggedIn'; the '$' prefix is reserved for implicitly-synthesized declarations" (for the static non isolated(safe)... expression)

For me, it's fine to disable this code until a fix is ready. So not particularly concerned about getting workarounds to resolve.

"Variable with getter/setter cannot have an initial value" (for setting isLoggedIn to false). I can remove this initialization. But then I get this error:

Ah apologies for the confusion there, you don't need to set the initial value for static var isLoggedIn: Bool. The initial value is actually picked up for the peer expansion's initializer: Tips.Parameter(Self.self, "+isLoggedIn", false).

struct ParameterRuleTip: Tip {
    // Define the app state you want to track.
static var isLoggedIn: Bool {
        get {
            $isLoggedIn.wrappedValue
        }
        set {
            $isLoggedIn.wrappedValue = newValue
        }
    }

    static nonisolated(unsafe) var _isLoggedIn: Tips.Parameter<Bool> = Tips.Parameter(Self.self, "+isLoggedIn", false)
}

"Cannot declare entity named '$isLoggedIn'; the '$' prefix is reserved for implicitly-synthesized declarations" (for the static non isolated(safe)... expression)

For the reserved $ prefix, you could change that and the rule to use an underscore or something else:

static nonisolated(unsafe) var _isLoggedIn: Tips.Parameter<Bool> = Tips.Parameter(Self.self, "+isLoggedIn", false)

var rules: [Rule] {
    #Rule(_isLoggedIn) { $0 == true }
}

But it should be resolved on the framework/macro side shortly as well!