Mercurial > urweb
annotate lib/ur/option.urs @ 883:467285bb5578
Avoid preparing the same statement twice
| author | Adam Chlipala <adamc@hcoop.net> |
|---|---|
| date | Fri, 17 Jul 2009 13:19:41 -0400 |
| parents | 0d30e6338c65 |
| children | da3ec6014d2f |
| rev | line source |
|---|---|
| adamc@841 | 1 datatype t = datatype Basis.option |
| adamc@841 | 2 |
| adamc@846 | 3 val eq : a ::: Type -> eq a -> eq (t a) |
| adamc@846 | 4 |
| adamc@841 | 5 val isSome : a ::: Type -> t a -> bool |
| adamc@844 | 6 |
| adamc@844 | 7 val mp : a ::: Type -> b ::: Type -> (a -> b) -> t a -> t b |
| adamc@846 | 8 val bind : a ::: Type -> b ::: Type -> (a -> option b) -> t a -> t b |