would be nice to be able to use "@Published" directive in earlier Swift versions that do not know it

[designerfuzzi]

while trying to implement OpenCombine to mimic missing Combine Framework in example in Xcode 11.3.1 projects where Swift does also not support @Published directive (nor @Bind , @StateObject or @ObservedObject) one could do something like..

@propertyWrapper
struct Published<T> {
    var wrappedValue: T {
        willSet { /*...*/ }
        didSet { /*...*/ }
    }
    init(wrappedValue: T) {
        
        // * -- maybe magic here! -- */
        
        /* or do more specific stuff.. ^^
        switch (wrappedValue) {
        //case is Optional<Any>.Type :
            //break
        case is Bool :
            break
        case is Error :
            break
        case is Optional<Error>.Type :
            break
        default: break
        }
        */
        self.wrappedValue = wrappedValue
    }
}

to implement such feature in Swift version prior .. where @propertyWrapper directive is available.
So the question is what should such wrapper look like in its inner logic?

opened a question in StackOverflow

it could be wrapped also in preprocessor directives like #if !canImport(Combine) or similar to limit where it would be applied in projects

also see: swiftbysundell.com/accessing-a-swift-property-wrappers

[designerfuzzi]

fixed. see: #217 (comment)

[designerfuzzi]

methodical thinking pointed the right direction and with help the learning curve was sharp. Thnx