My guess currently is that C++ 29 will get some sort of pattern matching. It's too big a feature to board the C++ 26 train in autumn 2024 and there's nowhere cl

My guess currently is that C++ 29 will get some sort of pattern matching. It's too big a feature to board the C++ 26 train in autumn 2024 and there's nowhere close to consensus on how it should work or how it's spelled yet. So, assume C++ 29 has pattern matching. That causes people to attempt various idiomatic constructions from languages which always had pattern matching, and of course they're all rather awkward in C++. I think that realisation might point towards an actual language sum type, possibly via abortive attempts to "fix" matching and/or some of the pseudo-sum types provided by the C++ stdlib. So then you'd expect proposals in C++ 32 or C++ 35.