https://issues.dlang.org/show_bug.cgi?id=17156
--- Comment #3 from Walter Bright <bugzi...@digitalmars.com> --- (In reply to Eyal from comment #2) > I see, but this would not be a problem if function was automatically > convertible to delegate (std.functional : toDelegate). > > Is there any reason that you cannot hand over functions when delegates are > expected? Yes. The ABI of how functions and delegates are passed ensures one cannot be treated as the other. The compiler could, behind the curtain, generate a wrapper to do this (as you suggest), but that has negative performance implications that users could find very surprising because it would be hidden from them. I prefer the library template solution for that reason. --
