On Monday, 10 May 2021 at 18:31:20 UTC, H. S. Teoh wrote: > This has been on the list for many years, and I haven't seen > any signs of it manifesting any time soon. Hi H. S. I assume it's not been done because it's hard. Do you happen to know what makes it a difficult problem for compiler implementers? I don't need to know, but am curious. Thanks,