We plan to disallow taking address of a ref return from a function.
What about sneaky cases? E.g. like this:
NullableRef!T nref(T)(ref T v) { return NullableRef!T(&v); }
struct Container(T) {
//...
ref inout(T) front() inout { ... }
}
Container!int cnt;
//...
auto n = nref(cnt.front());
