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comparison lib/ur/monad.ur @ 910:8e540df3294d

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grid1 compiles but gets stuck in JS
author Adam Chlipala <adamc@hcoop.net>
date Tue, 25 Aug 2009 13:57:56 -0400
parents 7a4b026e45dd
children 321a2d6feb40
comparison
equal deleted inserted replaced
909:1d3f60e74ec7 910:8e540df3294d
32 acc' <- acc (r1 -- nm) (r2 -- nm); 32 acc' <- acc (r1 -- nm) (r2 -- nm);
33 f [nm] [t] [rest] ! r1.nm r2.nm acc') 33 f [nm] [t] [rest] ! r1.nm r2.nm acc')
34 (fn _ _ => return i) 34 (fn _ _ => return i)
35 [_] fl 35 [_] fl
36 36
37 fun foldR3 [K] [m] (_ : monad m) [tf1 :: K -> Type] [tf2 :: K -> Type] [tf3 :: K -> Type] [tr :: {K} -> Type]
38 (f : nm :: Name -> t :: K -> rest :: {K}
39 -> [[nm] ~ rest] =>
40 tf1 t -> tf2 t -> tf3 t -> tr rest -> m (tr ([nm = t] ++ rest)))
41 (i : tr []) [r :: {K}] (fl : folder r) =
42 Top.fold [fn r :: {K} => $(map tf1 r) -> $(map tf2 r) -> $(map tf3 r) -> m (tr r)]
43 (fn [nm :: Name] [t :: K] [rest :: {K}] [[nm] ~ rest]
44 (acc : _ -> _ -> _ -> m (tr rest)) r1 r2 r3 =>
45 acc' <- acc (r1 -- nm) (r2 -- nm) (r3 -- nm);
46 f [nm] [t] [rest] ! r1.nm r2.nm r3.nm acc')
47 (fn _ _ _ => return i)
48 [_] fl
49
37 fun mapR [K] [m] (_ : monad m) [tf :: K -> Type] [tr :: K -> Type] 50 fun mapR [K] [m] (_ : monad m) [tf :: K -> Type] [tr :: K -> Type]
38 (f : nm :: Name -> t :: K -> tf t -> m (tr t)) = 51 (f : nm :: Name -> t :: K -> tf t -> m (tr t)) =
39 @@foldR [m] _ [tf] [fn r => $(map tr r)] 52 @@foldR [m] _ [tf] [fn r => $(map tr r)]
40 (fn [nm :: Name] [t :: K] [rest :: {K}] [[nm] ~ rest] (v : tf t) 53 (fn [nm :: Name] [t :: K] [rest :: {K}] [[nm] ~ rest] (v : tf t)
41 (acc : $(map tr rest)) => 54 (acc : $(map tr rest)) =>