1 (* Copyright (C) 1999-2006 Henry Cejtin, Matthew Fluet, Suresh
2 * Jagannathan, and Stephen Weeks.
4 * MLton is released under a BSD-style license.
5 * See the file MLton-LICENSE for details.
8 functor Ring(S: RING_STRUCTS):> RING where type t = S.t =
15 fun isZero a = equals(a, zero)
21 fun sum l = List.fold(l, zero, op +)