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demo/sum working with manual folders
author Adam Chlipala <adamc@hcoop.net>
date Sun, 22 Feb 2009 17:39:55 -0500
parents 588b9d16b00a
children 12b73f3c108e
rev   line source
adamc@623 1 (** Row folding *)
adamc@623 2
adamc@623 3 con folder = K ==> fn r :: {K} =>
adamc@623 4 tf :: ({K} -> Type)
adamc@623 5 -> (nm :: Name -> v :: K -> r :: {K} -> tf r
adamc@623 6 -> fn [[nm] ~ r] => tf ([nm = v] ++ r))
adamc@623 7 -> tf [] -> tf r
adamc@623 8
adamc@627 9 structure Folder = struct
adamc@627 10 fun nil K (tf :: {K} -> Type)
adamc@627 11 (f : nm :: Name -> v :: K -> r :: {K} -> tf r
adamc@627 12 -> fn [[nm] ~ r] => tf ([nm = v] ++ r))
adamc@627 13 (i : tf []) = i
adamc@627 14
adamc@627 15 fun cons K (r ::: {K}) (nm :: Name) (v :: K) [[nm] ~ r] (fold : folder r)
adamc@627 16 (tf :: {K} -> Type)
adamc@627 17 (f : nm :: Name -> v :: K -> r :: {K} -> tf r
adamc@627 18 -> fn [[nm] ~ r] => tf ([nm = v] ++ r))
adamc@627 19 (i : tf []) = f [nm] [v] [r] (fold [tf] f i)
adamc@627 20 end
adamc@627 21
adamc@623 22
adamc@422 23 fun not b = if b then False else True
adamc@422 24
adamc@356 25 con idT (t :: Type) = t
adamc@356 26 con record (t :: {Type}) = $t
adamc@356 27 con fstTT (t :: (Type * Type)) = t.1
adamc@356 28 con sndTT (t :: (Type * Type)) = t.2
adamc@445 29 con fstTTT (t :: (Type * Type * Type)) = t.1
adamc@445 30 con sndTTT (t :: (Type * Type * Type)) = t.2
adamc@445 31 con thdTTT (t :: (Type * Type * Type)) = t.3
adamc@329 32
adamc@621 33 con mapUT = fn f :: Type => map (fn _ :: Unit => f)
adamc@445 34
adamc@339 35 con ex = fn tf :: (Type -> Type) =>
adamc@356 36 res ::: Type -> (choice :: Type -> tf choice -> res) -> res
adamc@339 37
adamc@339 38 fun ex (tf :: (Type -> Type)) (choice :: Type) (body : tf choice) : ex tf =
adamc@356 39 fn (res ::: Type) (f : choice :: Type -> tf choice -> res) =>
adamc@356 40 f [choice] body
adamc@339 41
adamc@356 42 fun compose (t1 ::: Type) (t2 ::: Type) (t3 ::: Type)
adamc@356 43 (f1 : t2 -> t3) (f2 : t1 -> t2) (x : t1) = f1 (f2 x)
adamc@325 44
adamc@564 45 fun txt (t ::: Type) (ctx ::: {Unit}) (use ::: {Type}) (_ : show t) (v : t) =
adamc@564 46 cdata (show v)
adamc@328 47
adamc@411 48 fun foldUR (tf :: Type) (tr :: {Unit} -> Type)
adamc@411 49 (f : nm :: Name -> rest :: {Unit}
adamc@411 50 -> fn [[nm] ~ rest] =>
adamc@411 51 tf -> tr rest -> tr ([nm] ++ rest))
adamc@623 52 (i : tr []) (r ::: {Unit}) (fold : folder r)=
adamc@411 53 fold [fn r :: {Unit} => $(mapUT tf r) -> tr r]
adamc@623 54 (fn (nm :: Name) (t :: Unit) (rest :: {Unit}) acc
adamc@623 55 [[nm] ~ rest] r =>
adamc@623 56 f [nm] [rest] r.nm (acc (r -- nm)))
adamc@623 57 (fn _ => i)
adamc@411 58
adamc@418 59 fun foldUR2 (tf1 :: Type) (tf2 :: Type) (tr :: {Unit} -> Type)
adamc@418 60 (f : nm :: Name -> rest :: {Unit}
adamc@418 61 -> fn [[nm] ~ rest] =>
adamc@418 62 tf1 -> tf2 -> tr rest -> tr ([nm] ++ rest))
adamc@623 63 (i : tr []) (r ::: {Unit}) (fold : folder r) =
adamc@418 64 fold [fn r :: {Unit} => $(mapUT tf1 r) -> $(mapUT tf2 r) -> tr r]
adamc@623 65 (fn (nm :: Name) (t :: Unit) (rest :: {Unit}) acc
adamc@623 66 [[nm] ~ rest] r1 r2 =>
adamc@623 67 f [nm] [rest] r1.nm r2.nm (acc (r1 -- nm) (r2 -- nm)))
adamc@623 68 (fn _ _ => i)
adamc@418 69
adamc@418 70 fun foldURX2 (tf1 :: Type) (tf2 :: Type) (ctx :: {Unit})
adamc@418 71 (f : nm :: Name -> rest :: {Unit}
adamc@418 72 -> fn [[nm] ~ rest] =>
adamc@418 73 tf1 -> tf2 -> xml ctx [] []) =
adamc@418 74 foldUR2 [tf1] [tf2] [fn _ => xml ctx [] []]
adamc@418 75 (fn (nm :: Name) (rest :: {Unit}) [[nm] ~ rest] v1 v2 acc =>
adamc@418 76 <xml>{f [nm] [rest] v1 v2}{acc}</xml>)
adamc@418 77 <xml/>
adamc@418 78
adamc@623 79 fun foldR K (tf :: K -> Type) (tr :: {K} -> Type)
adamc@623 80 (f : nm :: Name -> t :: K -> rest :: {K}
adamc@356 81 -> fn [[nm] ~ rest] =>
adamc@356 82 tf t -> tr rest -> tr ([nm = t] ++ rest))
adamc@623 83 (i : tr []) (r ::: {K}) (fold : folder r) =
adamc@623 84 fold [fn r :: {K} => $(map tf r) -> tr r]
adamc@623 85 (fn (nm :: Name) (t :: K) (rest :: {K}) (acc : _ -> tr rest)
adamc@356 86 [[nm] ~ rest] r =>
adamc@356 87 f [nm] [t] [rest] r.nm (acc (r -- nm)))
adamc@356 88 (fn _ => i)
adamc@336 89
adamc@623 90 fun foldR2 K (tf1 :: K -> Type) (tf2 :: K -> Type) (tr :: {K} -> Type)
adamc@623 91 (f : nm :: Name -> t :: K -> rest :: {K}
adamc@367 92 -> fn [[nm] ~ rest] =>
adamc@367 93 tf1 t -> tf2 t -> tr rest -> tr ([nm = t] ++ rest))
adamc@623 94 (i : tr []) (r ::: {K}) (fold : folder r) =
adamc@623 95 fold [fn r :: {K} => $(map tf1 r) -> $(map tf2 r) -> tr r]
adamc@623 96 (fn (nm :: Name) (t :: K) (rest :: {K})
adamc@623 97 (acc : _ -> _ -> tr rest) [[nm] ~ rest] r1 r2 =>
adamc@623 98 f [nm] [t] [rest] r1.nm r2.nm (acc (r1 -- nm) (r2 -- nm)))
adamc@623 99 (fn _ _ => i)
adamc@332 100
adamc@623 101 fun foldRX K (tf :: K -> Type) (ctx :: {Unit})
adamc@623 102 (f : nm :: Name -> t :: K -> rest :: {K}
adamc@356 103 -> fn [[nm] ~ rest] =>
adamc@356 104 tf t -> xml ctx [] []) =
adamc@623 105 foldR [tf] [fn _ => xml ctx [] []]
adamc@623 106 (fn (nm :: Name) (t :: K) (rest :: {K}) [[nm] ~ rest] r acc =>
adamc@623 107 <xml>{f [nm] [t] [rest] r}{acc}</xml>)
adamc@623 108 <xml/>
adamc@336 109
adamc@623 110 fun foldRX2 K (tf1 :: K -> Type) (tf2 :: K -> Type) (ctx :: {Unit})
adamc@623 111 (f : nm :: Name -> t :: K -> rest :: {K}
adamc@356 112 -> fn [[nm] ~ rest] =>
adamc@356 113 tf1 t -> tf2 t -> xml ctx [] []) =
adamc@623 114 foldR2 [tf1] [tf2] [fn _ => xml ctx [] []]
adamc@623 115 (fn (nm :: Name) (t :: K) (rest :: {K}) [[nm] ~ rest]
adamc@623 116 r1 r2 acc =>
adamc@623 117 <xml>{f [nm] [t] [rest] r1 r2}{acc}</xml>)
adamc@623 118 <xml/>
adamc@445 119
adamc@356 120 fun queryX (tables ::: {{Type}}) (exps ::: {Type}) (ctx ::: {Unit})
adamc@356 121 (q : sql_query tables exps) [tables ~ exps]
adamc@621 122 (f : $(exps ++ map (fn fields :: {Type} => $fields) tables)
adamc@356 123 -> xml ctx [] []) =
adamc@356 124 query q
adamc@356 125 (fn fs acc => return <xml>{acc}{f fs}</xml>)
adamc@360 126 <xml/>
adamc@341 127
adamc@469 128 fun queryX' (tables ::: {{Type}}) (exps ::: {Type}) (ctx ::: {Unit})
adamc@469 129 (q : sql_query tables exps) [tables ~ exps]
adamc@621 130 (f : $(exps ++ map (fn fields :: {Type} => $fields) tables)
adamc@469 131 -> transaction (xml ctx [] [])) =
adamc@469 132 query q
adamc@469 133 (fn fs acc =>
adamc@469 134 r <- f fs;
adamc@469 135 return <xml>{acc}{r}</xml>)
adamc@469 136 <xml/>
adamc@469 137
adamc@356 138 fun oneOrNoRows (tables ::: {{Type}}) (exps ::: {Type})
adamc@356 139 (q : sql_query tables exps) [tables ~ exps] =
adamc@356 140 query q
adamc@356 141 (fn fs _ => return (Some fs))
adamc@356 142 None
adamc@440 143
adamc@440 144 fun oneRow (tables ::: {{Type}}) (exps ::: {Type})
adamc@440 145 (q : sql_query tables exps) [tables ~ exps] =
adamc@440 146 o <- oneOrNoRows q;
adamc@440 147 return (case o of
adamc@440 148 None => error <xml>Query returned no rows</xml>
adamc@440 149 | Some r => r)
adamc@440 150
adamc@470 151 fun eqNullable (tables ::: {{Type}}) (agg ::: {{Type}}) (exps ::: {Type})
adamc@470 152 (t ::: Type) (_ : sql_injectable (option t))
adamc@470 153 (e1 : sql_exp tables agg exps (option t))
adamc@470 154 (e2 : sql_exp tables agg exps (option t)) =
adamc@471 155 (SQL ({e1} IS NULL AND {e2} IS NULL) OR {e1} = {e2})
adamc@470 156
adamc@470 157 fun eqNullable' (tables ::: {{Type}}) (agg ::: {{Type}}) (exps ::: {Type})
adamc@564 158 (t ::: Type) (_ : sql_injectable (option t))
adamc@470 159 (e1 : sql_exp tables agg exps (option t))
adamc@470 160 (e2 : option t) =
adamc@470 161 case e2 of
adamc@471 162 None => (SQL {e1} IS NULL)
adamc@564 163 | Some _ => sql_binary sql_eq e1 (sql_inject e2)