The same functionality has been in boost [0] for quite a while. So, if you can't see the ugly iterators anymore, but have an outdated compiler, this is an optio

The same functionality has been in boost [0] for quite a while. So, if you can't see the ugly iterators anymore, but have an outdated compiler, this is an option. [0] https://www.boost.org/doc/libs/1_72_0/libs/range/doc/html/index.html https://www.boost.org/doc/libs/1_72_0/libs/range/doc/html/in...