John Carmack on Functional programming in C++

Prior HN art for the original URL (plainly linked from Gamasutra btw): http://news.ycombinator.com/item?id=3896404

Incidentally the book Modern Compiler Design in C has sample code in a mostly functional style and talks about these same issues.

Please don't post an exact copy-of-a-copy of a blog post that was already an HN headline yesterday.