Interesting way to use swift autoclosure for dynamic values

Dynamic.swift

struct Dynamic<T> {
    let get: () -> T
    init(_ get: @autoclosure @escaping () -> T) {
        self.get = get
    }

    var value: T { return get() }
}

var i: Int = 0
let dynamic = Dynamic(i)
dynamic.value // 0
i = 1
dynamic.value // 1