Import Upstream version 20180207
[hcoop/debian/mlton.git] / lib / mlton / basic / unit.sml
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1(* Copyright (C) 1999-2005 Henry Cejtin, Matthew Fluet, Suresh
2 * Jagannathan, and Stephen Weeks.
3 *
4 * MLton is released under a BSD-style license.
5 * See the file MLton-LICENSE for details.
6 *)
7
8structure Unit: UNIT =
9struct
10
11type t = unit
12
13val equals = fn ((), ()) => true
14
15fun layout() = Layout.str"()"
16
17end