Currently the following important functions of the HPX API:
only offer nonsatisfiable capabilities for nested
hpx::future types inside homogeneous and heterogeneous containers.
In order to fully support the requirements for accepting argument types described in #2456, #1404, #1400 and #1126 this proposal intends to extend the capabilities of the functions listed above to access nested
hpx::future types as well as unwrapping such types. When the proposal is implemented, all the functions listed above should accept the same set of arguments (unification).