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author | Adam Chlipala <adamc@hcoop.net> | 2010-03-02 10:33:49 -0500 |
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committer | Adam Chlipala <adamc@hcoop.net> | 2010-03-02 10:33:49 -0500 |
commit | 74e835c7db56fb5e716add3bb8fe19534b557282 (patch) | |
tree | cdb41c09be72bd53807f60fd2983698b9e244bc3 /lib/ur/monad.urs | |
parent | 3058e5f4192f8b9617ae157cb5d1e6040d79a8d9 (diff) |
Monad.foldMapR
Diffstat (limited to 'lib/ur/monad.urs')
-rw-r--r-- | lib/ur/monad.urs | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/lib/ur/monad.urs b/lib/ur/monad.urs index 05f201e0..cf20dd0f 100644 --- a/lib/ur/monad.urs +++ b/lib/ur/monad.urs @@ -50,3 +50,13 @@ val mapR2 : K --> m ::: (Type -> Type) -> monad m -> tr :: (K -> Type) -> (nm :: Name -> t :: K -> tf1 t -> tf2 t -> m (tr t)) -> r ::: {K} -> folder r -> $(map tf1 r) -> $(map tf2 r) -> m ($(map tr r)) + +val foldMapR : K --> m ::: (Type -> Type) -> monad m + -> tf :: (K -> Type) + -> tf' :: (K -> Type) + -> tr :: ({K} -> Type) + -> (nm :: Name -> t :: K -> rest :: {K} + -> [[nm] ~ rest] => + tf t -> tr rest -> m (tf' t * tr ([nm = t] ++ rest))) + -> tr [] + -> r ::: {K} -> folder r -> $(map tf r) -> m ($(map tf' r) * tr r) |