[#54] cpp::invoke()
[#54] cpp::invoke()

Follows C++17 std::invoke() semantics, except for pointers to data
members which are currently not supported by cpp::invoke()
(Since we don't need them yet)

GueimUCM/siplasplas,GueimUCM/siplasplas,Manu343726/siplasplas,Manu343726/siplasplas,GueimUCM/siplasplas,Manu343726/siplasplas,Manu343726/siplasplas