A c++20 range is just a bounded container. instead of having to write, `(container.begin(), container.end())` for any function that uses iterators to bound itself, you just write `(container)` and it knows its a range.

The range function in python is similar only in name, the c++20 range concept is not a generator.

2. There is a coroutine feature branch, I believe developed by Gor Nishanov, https://github.com/GorNishanov. Also not related to c++20 ranges.

3. Eric Niebler used a single templated function. This is not anywhere close to template metaprogramming hell, and I think you should look into templates as once you learn about them they become way less intimidating. Also has nothing to do with c++20 ranges.