“Losing Language Features: Some Stories About Disjoint Unions”, Graydon Hoare (https://graydon2.dreamwidth.org/318788.html, which 403s for me, so https://archive.is/oTbMW).

On HN: https://news.ycombinator.com/item?id=44605245

#PLDI #Programming #Variants #DisjointUnions #TaggedUnions #SumTypes #Mesa #CPP