On Monday, 14 May 2012 at 18:52:06 UTC, deadalnix wrote: > The only reason I'd see a toSting function as non pure or non > const is memoize. It can be tackled with lib support in phobos. > > What are other uses cases ? Did you miss my post? http://forum.dlang.org/post/azevkvzkhhfnpmtzgnvp@forum.dlang.org