Any C++ function that has serializable arguments and a serializable return type should be remotable

[brycelelbach]

Using template actions, we should be able to make things like hpx::async(f, id) work for any C++ function that has serialzable arguments and a serializable return type.

[hkaiser]

There is no way to distinguish the new form (as requested) hpx::async(f, id, ...) from the existing form (which does a local operation hpx::async(f, ...). I'm not sure if it's a good idea to enable_if based on the argument type of the first argument (i.e. the id_type).

Seems we will not be able to implement this, even if it would make for a nice extension of our API.