On Wednesday, 20 March 2013 at 17:44:16 UTC, Ali Çehreli wrote: > In that case, brute force to the rescue (nc stands for > non-const): :) > > this(const(Series[string]) source) { > auto nc_source = cast(Series[string])source; > itemToSeries = nc_source.dup; > } Wow - that worked. Thanks! I hope it is safe.