@propertyWrapper
struct Foo {
    let name: String

    init() {
        self.name = ""
    }

    init(name: String) {
        self.name = name
    }

    var wrappedValue: Int {
        get { return 0 }
    }
}

struct TestFoo {
    @Foo var v1: Int
    @Foo() var v2: Int
    @Foo(name: "v3") var v3: Int

   init() { }
}

@propertyWrapper
struct Bar {
    let name: String

    init(name: String = "") {
        self.name = name
    }

    var wrappedValue: Int {
        get { return 0 }
    }
}

struct TestBar {
    @Bar var v1: Int
    @Bar() var v2: Int
    @Bar(name: "v3") var v3: Int

    init() {
        /* Compilation error
        error: return from initializer without initializing all stored properties
        note: 'self.v1' not initialized
         */
    }
}