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[smlnj] View of /tests/trunk/bugs/tests.obsolete/bug1510.1.sml
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View of /tests/trunk/bugs/tests.obsolete/bug1510.1.sml

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Revision 2460 - (download) (annotate)
Sat Apr 28 20:18:10 2007 UTC (12 years, 2 months ago) by gkuan
File size: 308 byte(s)
(* bug1510.1.sml *)

functor Cast(type from type to) :>
sig
  type ('a, 'b) t = 'a -> 'b
  val cast: (from, to) t
end =
struct
  type ('a, 'b) t = 'a -> 'a
  fun cast x = x
end;

structure IntListToIntOption =
  Cast(type from = int list
       type to = int option);

val it = IntListToIntOption.cast [17];

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