Mercurial > urweb
view lib/ur/monad.ur @ 1100:9645e3c2978e
Test case for character code escapes
author | Adam Chlipala <adamc@hcoop.net> |
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date | Tue, 29 Dec 2009 15:03:44 -0500 |
parents | 8d3aa6c7cee0 |
children | ad15700272f6 |
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fun exec [m ::: Type -> Type] (_ : monad m) [ts ::: {Type}] r (fd : folder ts) = @foldR [m] [fn ts => m $ts] (fn [nm :: Name] [v :: Type] [rest :: {Type}] [[nm] ~ rest] action acc => this <- action; others <- acc; return ({nm = this} ++ others)) (return {}) fd r fun ignore [m ::: Type -> Type] (_ : monad m) [t] (v : m t) = x <- v; return () fun mp [m] (_ : monad m) [a] [b] f m = v <- m; return (f v) fun foldR [K] [m] (_ : monad m) [tf :: K -> Type] [tr :: {K} -> Type] (f : nm :: Name -> t :: K -> rest :: {K} -> [[nm] ~ rest] => tf t -> tr rest -> m (tr ([nm = t] ++ rest))) (i : tr []) [r ::: {K}] (fl : folder r) = @Top.fold [fn r :: {K} => $(map tf r) -> m (tr r)] (fn [nm :: Name] [t :: K] [rest :: {K}] [[nm] ~ rest] (acc : _ -> m (tr rest)) r => acc' <- acc (r -- nm); f [nm] [t] [rest] ! r.nm acc') (fn _ => return i) fl fun foldR2 [K] [m] (_ : monad m) [tf1 :: K -> Type] [tf2 :: K -> Type] [tr :: {K} -> Type] (f : nm :: Name -> t :: K -> rest :: {K} -> [[nm] ~ rest] => tf1 t -> tf2 t -> tr rest -> m (tr ([nm = t] ++ rest))) (i : tr []) [r ::: {K}] (fl : folder r) = @Top.fold [fn r :: {K} => $(map tf1 r) -> $(map tf2 r) -> m (tr r)] (fn [nm :: Name] [t :: K] [rest :: {K}] [[nm] ~ rest] (acc : _ -> _ -> m (tr rest)) r1 r2 => acc' <- acc (r1 -- nm) (r2 -- nm); f [nm] [t] [rest] ! r1.nm r2.nm acc') (fn _ _ => return i) fl fun foldR3 [K] [m] (_ : monad m) [tf1 :: K -> Type] [tf2 :: K -> Type] [tf3 :: K -> Type] [tr :: {K} -> Type] (f : nm :: Name -> t :: K -> rest :: {K} -> [[nm] ~ rest] => tf1 t -> tf2 t -> tf3 t -> tr rest -> m (tr ([nm = t] ++ rest))) (i : tr []) [r ::: {K}] (fl : folder r) = @Top.fold [fn r :: {K} => $(map tf1 r) -> $(map tf2 r) -> $(map tf3 r) -> m (tr r)] (fn [nm :: Name] [t :: K] [rest :: {K}] [[nm] ~ rest] (acc : _ -> _ -> _ -> m (tr rest)) r1 r2 r3 => acc' <- acc (r1 -- nm) (r2 -- nm) (r3 -- nm); f [nm] [t] [rest] ! r1.nm r2.nm r3.nm acc') (fn _ _ _ => return i) fl fun mapR [K] [m] (_ : monad m) [tf :: K -> Type] [tr :: K -> Type] (f : nm :: Name -> t :: K -> tf t -> m (tr t)) = @@foldR [m] _ [tf] [fn r => $(map tr r)] (fn [nm :: Name] [t :: K] [rest :: {K}] [[nm] ~ rest] (v : tf t) (acc : $(map tr rest)) => v' <- f [nm] [t] v; return (acc ++ {nm = v'})) {} fun mapR2 [K] [m] (_ : monad m) [tf1 :: K -> Type] [tf2 :: K -> Type] [tr :: K -> Type] (f : nm :: Name -> t :: K -> tf1 t -> tf2 t -> m (tr t)) = @@foldR2 [m] _ [tf1] [tf2] [fn r => $(map tr r)] (fn [nm :: Name] [t :: K] [rest :: {K}] [[nm] ~ rest] (v1 : tf1 t) (v2 : tf2 t) (acc : $(map tr rest)) => v' <- f [nm] [t] v1 v2; return (acc ++ {nm = v'})) {}