std:tuple
We definitely need something like std:tuple for EPOS. However, as always, the STL implementation (https://github.com/gcc-mirror/gcc/blob/master/libstdc%2B%2B-v3/include/std/tuple) is too heavy and too zealous for things that never happen in system-land. Would someone date to produce a light version of it (similar to what I did for OStream and meta.h)?