structure I = struct type t = int val toString = show val fromString = read end structure S = struct type t = string val toString = show val fromString = read end structure IL = ListFun.Make(I) structure SL = ListFun.Make(S) fun main () = return <xml><body> Pick your poison:<br/> <li> <a link={IL.main ()}>Integers</a></li> <li> <a link={SL.main ()}>Strings</a></li> </body></xml>