diff options
Diffstat (limited to 'lib/ur/monad.ur')
-rw-r--r-- | lib/ur/monad.ur | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/lib/ur/monad.ur b/lib/ur/monad.ur index 211b6cbd..4fc1de87 100644 --- a/lib/ur/monad.ur +++ b/lib/ur/monad.ur @@ -92,3 +92,15 @@ fun foldMapR [K] [m] (_ : monad m) [tf :: K -> Type] [tf' :: K -> Type] [tr :: { return ({nm = p'.1} ++ p.1, p'.2)) (fn _ => return ({}, i)) fl + +fun appR2 [K] [m] (_ : monad m) [tf1 :: K -> Type] [tf2 :: K -> Type] + (f : nm :: Name -> t :: K -> rest :: {K} + -> [[nm] ~ rest] => + tf1 t -> tf2 t -> m unit) + [r ::: {K}] (fl : folder r) = + @Top.fold [fn r :: {K} => $(map tf1 r) -> $(map tf2 r) -> m unit] + (fn [nm :: Name] [t :: K] [rest :: {K}] [[nm] ~ rest] acc r1 r2 => + acc (r1 -- nm) (r2 -- nm); + f [nm] [t] [rest] ! r1.nm r2.nm) + (fn _ _ => return ()) + fl |