Apparently, C++20 has a new std::istream-related construct: std::istream_view. The cppreference page on it is a stub right now†. So, what is a "view of an istream" and what can I use it f...

I was trying to implement a generic reduction operation for my extensions for c++20's ranges that would collect the elements of any range into a given container. To achieve that, I first created a ...