| 1 | signature OPTION_GLOBAL = |
| 2 | sig |
| 3 | datatype 'a option = NONE | SOME of 'a |
| 4 | |
| 5 | exception Option |
| 6 | |
| 7 | val getOpt: 'a option * 'a -> 'a |
| 8 | val isSome: 'a option -> bool |
| 9 | val valOf: 'a option -> 'a |
| 10 | end |
| 11 | |
| 12 | signature OPTION = |
| 13 | sig |
| 14 | include OPTION_GLOBAL |
| 15 | |
| 16 | val app: ('a -> unit) -> 'a option -> unit |
| 17 | val compose: ('a -> 'b) * ('c -> 'a option) -> 'c -> 'b option |
| 18 | val composePartial: ('a -> 'b option) * ('c -> 'a option) -> 'c -> 'b option |
| 19 | val filter: ('a -> bool) -> 'a -> 'a option |
| 20 | val join: 'a option option -> 'a option |
| 21 | val map: ('a -> 'b) -> 'a option -> 'b option |
| 22 | val mapPartial: ('a -> 'b option) -> 'a option -> 'b option |
| 23 | end |