Is there a way to get number of elements inside a tuple? This is known at compile time, of course; as tuples are fixed structures.
At first glance, this probably sounds like an odd request, but i'm writing macro for an inheritable framework with objects referencing other inheritable objects. And it would be of convenience to the user of the framework if this were resolved without the need for human counting. One less mistake to make and debug. Not a deal breaker, of course. Just fewer "oops I forgot to change that" mistakes.
