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7f918cf1 CE |
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 | ||
8 | signature OPTION = | |
9 | sig | |
10 | type 'a t = 'a option | |
11 | ||
12 | val app: 'a t * ('a -> unit) -> unit | |
13 | val equals: 'a t * 'a t * ('a * 'a -> bool) -> bool | |
14 | val exists: 'a t * ('a -> bool) -> bool | |
15 | val fold: 'a t * 'b * ('a * 'b -> 'b) -> 'b | |
16 | val forall: 'a t * ('a -> bool) -> bool | |
17 | val foreach: 'a t * ('a -> unit) -> unit | |
18 | val isNone: 'a t -> bool | |
19 | val isSome: 'a t -> bool | |
20 | val layout: ('a -> Layout.t) -> 'a t -> Layout.t | |
21 | val map: 'a t * ('a -> 'b) -> 'b t | |
22 | val toString: ('a -> string) -> 'a t -> string | |
23 | val valOf: 'a t -> 'a | |
24 | end |