The new Release 20.03 is out! You can download binaries for Windows and many major Linux distros here .
From where this assurance comes from?
Because it is a waste of time to implement something which will not work 100% and will be useful to very few people.
typename std::iterator_traits<typename std::remove_reference<C1>::type::iterator>::value_type();
It is very helpful to highlight template braces.