How to extract the type of an unnamed struct to create a new type within the struct itself?

It's easy to create a method/function parametrized on the type of an unnamed struct:

struct Foo {
  template <typename T> Foo(T*) { /* we have access to T here */ }
}

template<typename T> struct Bar {};

void test() {
  struct {
    Foo foo { this };
  } unnamed;
}

It is also easy to get the type after the struct's definition:

Bar<decltype(unnamed)> bar;

But is there any template magic that could allow the use of unnamed's type within Foo, not merely within its constructor or outside of it? Akin to this pseudo code:?

struct {
  Bar<decltype(this)> foo;
} unnamed;