Is There a Discard Iterator for Standard Sepus Fos?

M d span is in, which i'm quite excited about. I joined the committee back in two thousand 15 with the purpose of working on putting a multidimensional ara type into the standard. And now, seven years later, success. Em, and see what other things yel, let's just to rapid fire. Will look at language in a se the range, fold, algarythms. Can you name the four fold algorithms that got added?