annotate lib/ur/monad.ur @ 855:28e42b22424d
Initial implementation of protocols in Settings
| author |
Adam Chlipala <adamc@hcoop.net> |
| date |
Tue, 23 Jun 2009 15:56:04 -0400 |
| parents |
74e9e7642f08 |
| children |
d1d0b18afd3d |
| rev |
line source |
|
adamc@834
|
1 fun exec [m ::: Type -> Type] (_ : monad m) [ts ::: {Type}] r (fd : folder ts) =
|
|
adamc@834
|
2 foldR [m] [fn ts => m $ts]
|
|
adamc@834
|
3 (fn [nm :: Name] [v :: Type] [rest :: {Type}] [[nm] ~ rest] action acc =>
|
|
adamc@834
|
4 this <- action;
|
|
adamc@834
|
5 others <- acc;
|
|
adamc@834
|
6 return ({nm = this} ++ others))
|
|
adamc@834
|
7 (return {}) [ts] fd r
|
