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Deletion for Crud
author Adam Chlipala <adamc@hcoop.net>
date Sat, 13 Sep 2008 20:15:30 -0400
parents 34847732cefc
children 075b36dbb1a4
rev   line source
adamc@329 1 con idT = fn t :: Type => t
adamc@329 2 con record = fn t :: {Type} => $t
adamc@329 3
adamc@325 4 con mapTT (f :: Type -> Type) = fold (fn nm t acc => [nm] ~ acc =>
adamc@325 5 [nm = f t] ++ acc) []
adamc@325 6
adamc@325 7 fun compose (t1 ::: Type) (t2 ::: Type) (t3 ::: Type) (f1 : t2 -> t3) (f2 : t1 -> t2) (x : t1) = f1 (f2 x)
adamc@325 8
adamc@325 9 fun txt (t ::: Type) (ctx ::: {Unit}) (use ::: {Type}) (sh : show t) (v : t) = cdata (show sh v)
adamc@328 10
adamc@336 11 fun foldTR (tf :: Type -> Type) (tr :: {Type} -> Type)
adamc@336 12 (f : nm :: Name -> t :: Type -> rest :: {Type} -> [nm] ~ rest
adamc@336 13 -> tf t -> tr rest -> tr ([nm = t] ++ rest))
adamc@336 14 (i : tr []) =
adamc@336 15 fold [fn r :: {Type} => $(mapTT tf r) -> tr r]
adamc@336 16 (fn (nm :: Name) (t :: Type) (rest :: {Type}) (acc : _ -> tr rest) =>
adamc@336 17 [[nm] ~ rest] =>
adamc@336 18 fn r => f [nm] [t] [rest] r.nm (acc (r -- nm)))
adamc@336 19 (fn _ => i)
adamc@336 20
adamc@330 21 fun foldTR2 (tf1 :: Type -> Type) (tf2 :: Type -> Type) (tr :: {Type} -> Type)
adamc@328 22 (f : nm :: Name -> t :: Type -> rest :: {Type} -> [nm] ~ rest
adamc@328 23 -> tf1 t -> tf2 t -> tr rest -> tr ([nm = t] ++ rest))
adamc@328 24 (i : tr []) =
adamc@328 25 fold [fn r :: {Type} => $(mapTT tf1 r) -> $(mapTT tf2 r) -> tr r]
adamc@328 26 (fn (nm :: Name) (t :: Type) (rest :: {Type}) (acc : _ -> _ -> tr rest) =>
adamc@328 27 [[nm] ~ rest] =>
adamc@328 28 fn r1 r2 => f [nm] [t] [rest] r1.nm r2.nm (acc (r1 -- nm) (r2 -- nm)))
adamc@328 29 (fn _ _ => i)
adamc@332 30
adamc@336 31 fun foldTRX (tf :: Type -> Type) (ctx :: {Unit})
adamc@336 32 (f : nm :: Name -> t :: Type -> rest :: {Type} -> [nm] ~ rest
adamc@336 33 -> tf t -> xml ctx [] []) =
adamc@336 34 foldTR [tf] [fn _ => xml ctx [] []]
adamc@336 35 (fn (nm :: Name) (t :: Type) (rest :: {Type}) =>
adamc@336 36 [[nm] ~ rest] =>
adamc@336 37 fn r acc => <xml>{f [nm] [t] [rest] r}{acc}</xml>)
adamc@336 38 <xml></xml>
adamc@336 39
adamc@332 40 fun foldTRX2 (tf1 :: Type -> Type) (tf2 :: Type -> Type) (ctx :: {Unit})
adamc@332 41 (f : nm :: Name -> t :: Type -> rest :: {Type} -> [nm] ~ rest
adamc@332 42 -> tf1 t -> tf2 t -> xml ctx [] []) =
adamc@332 43 foldTR2 [tf1] [tf2] [fn _ => xml ctx [] []]
adamc@332 44 (fn (nm :: Name) (t :: Type) (rest :: {Type}) =>
adamc@332 45 [[nm] ~ rest] =>
adamc@332 46 fn r1 r2 acc => <xml>{f [nm] [t] [rest] r1 r2}{acc}</xml>)
adamc@332 47 <xml></xml>
adamc@334 48
adamc@334 49 fun queryX (tables ::: {{Type}}) (exps ::: {Type}) (ctx ::: {Unit}) (q : sql_query tables exps) =
adamc@334 50 [tables ~ exps] =>
adamc@334 51 fn (f : $(exps ++ fold (fn nm (fields :: {Type}) acc => [nm] ~ acc => [nm = $fields] ++ acc) [] tables)
adamc@334 52 -> xml ctx [] []) =>
adamc@334 53 query q
adamc@334 54 (fn fs acc => return <xml>{acc}{f fs}</xml>)
adamc@334 55 <xml></xml>