struct Unique(T, Allocator = Mallocator) {
    private alias Alloc = TypedAllocator!Allocator;
    mixin SmartPtrMembers!T;

    @disable this();
    @disable this(this);
    @disable void opAssign();

    private void makeElement(Args...)(Args args) {
        mElement = Alloc.allocate!T();
        construct(mElement, args);
    }

    private this(EmptyInitializer) {
        makeElement();
    }

    private this(Args...)(auto ref Args args) if (Args.length > 0) {
        makeElement(args);
    }

    ~this() {
        destroyElement();
    }

    static typeof(this) make(Args...)(Args args) {
        static if (Args.length > 0) {
            return typeof(this)(args);
        } else {
            return typeof(this)(empty);
        }
    }
}