On Wednesday, 13 November 2013 at 11:12:55 UTC, Gary Willoughby wrote: > On Wednesday, 13 November 2013 at 11:03:48 UTC, bearophile > wrote: >> Associative arrays don't have a dup. > > According to this they do: http://dlang.org/hash-map.html And adding parens works fine. `hashmap.dup()`.