Limiting template functions to template instantiations of a struct

[Dicebot]

On Wednesday, 6 November 2013 at 22:41:08 UTC, Atila Neves wrote:
> I know, but I keep having to refer back to that and even then I 
> didn't know about the syntax these guys just posted! ;)

Well, it is mentioned in the list of `is` usage cases down that 
link. It is very ugly part of the language but definitely worth 
spending some time to carefully investigate all the patterns - 
damn powerful stuff.