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 signature SUM_STRUCTS =
22 val equals: t * t -> bool
23 val layout: t -> Layout.t
24 val map: t * (X.t -> 'a) * (Y.t -> 'a) -> 'a