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7f918cf1 CE |
1 | (* Copyright (C) 1999-2006 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 | ||
8 | functor WordToBool (S : sig | |
9 | eqtype t | |
10 | val one: t | |
11 | val zero: t | |
12 | end) : sig | |
13 | eqtype t | |
14 | val fromBool: bool -> t | |
15 | val toBool: t -> bool | |
16 | end = | |
17 | struct | |
18 | open S | |
19 | ||
20 | val fromBool: bool -> t = fn b => if b then zero else one | |
21 | val toBool: t -> bool = fn w => w <> zero | |
22 | end |