[jandrewrogers]

Yeah, the std::ranges implementation is a bit of a mess. The inability to start clean without regard for backward compatibility reasons limits what is possible. I think most people see how you could implement comparable functionality with nicer properties from a clean sheet of paper. It is the curse of being an old language.

[imron]

There are sane approaches to dealing with this - e.g. epochs.

This wasn’t proven by the time c++11 was ready, but for c++20 and beyond it’s a shame they didn’t go with this.