adamc@422: fun not b = if b then False else True
adamc@422: 
adamc@356: con idT (t :: Type) = t
adamc@356: con record (t :: {Type}) = $t
adamc@356: con fstTT (t :: (Type * Type)) = t.1
adamc@356: con sndTT (t :: (Type * Type)) = t.2
adamc@329: 
adamc@356: con mapTT (f :: Type -> Type) = fold (fn nm t acc [[nm] ~ acc] =>
adamc@356:                                          [nm = f t] ++ acc) []
adamc@325: 
adamc@411: con mapUT = fn f :: Type => fold (fn nm t acc [[nm] ~ acc] =>
adamc@411:                                      [nm = f] ++ acc) []
adamc@411: 
adamc@356: con mapT2T (f :: (Type * Type) -> Type) = fold (fn nm t acc [[nm] ~ acc] =>
adamc@356:                                                    [nm = f t] ++ acc) []
adamc@339: 
adamc@339: con ex = fn tf :: (Type -> Type) =>
adamc@356:             res ::: Type -> (choice :: Type -> tf choice -> res) -> res
adamc@339: 
adamc@339: fun ex (tf :: (Type -> Type)) (choice :: Type) (body : tf choice) : ex tf =
adamc@356:  fn (res ::: Type) (f : choice :: Type -> tf choice -> res) =>
adamc@356:     f [choice] body
adamc@339: 
adamc@356: fun compose (t1 ::: Type) (t2 ::: Type) (t3 ::: Type)
adamc@356:             (f1 : t2 -> t3) (f2 : t1 -> t2) (x : t1) = f1 (f2 x)
adamc@325: 
adamc@356: fun txt (t ::: Type) (ctx ::: {Unit}) (use ::: {Type}) (sh : show t) (v : t) =
adamc@403:     cdata (@show sh v)
adamc@328: 
adamc@411: fun foldUR (tf :: Type) (tr :: {Unit} -> Type)
adamc@411:            (f : nm :: Name -> rest :: {Unit}
adamc@411:                 -> fn [[nm] ~ rest] =>
adamc@411:                       tf -> tr rest -> tr ([nm] ++ rest))
adamc@411:            (i : tr []) =
adamc@411:     fold [fn r :: {Unit} => $(mapUT tf r) -> tr r]
adamc@412:              (fn (nm :: Name) (t :: Unit) (rest :: {Unit}) acc
adamc@412:                               [[nm] ~ rest] r =>
adamc@411:                  f [nm] [rest] r.nm (acc (r -- nm)))
adamc@411:              (fn _ => i)
adamc@411: 
adamc@418: fun foldUR2 (tf1 :: Type) (tf2 :: Type) (tr :: {Unit} -> Type)
adamc@418:            (f : nm :: Name -> rest :: {Unit}
adamc@418:                 -> fn [[nm] ~ rest] =>
adamc@418:                       tf1 -> tf2 -> tr rest -> tr ([nm] ++ rest))
adamc@418:            (i : tr []) =
adamc@418:     fold [fn r :: {Unit} => $(mapUT tf1 r) -> $(mapUT tf2 r) -> tr r]
adamc@418:              (fn (nm :: Name) (t :: Unit) (rest :: {Unit}) acc
adamc@418:                               [[nm] ~ rest] r1 r2 =>
adamc@418:                  f [nm] [rest] r1.nm r2.nm (acc (r1 -- nm) (r2 -- nm)))
adamc@418:              (fn _ _ => i)
adamc@418: 
adamc@418: fun foldURX2 (tf1 :: Type) (tf2 :: Type) (ctx :: {Unit})
adamc@418:            (f : nm :: Name -> rest :: {Unit}
adamc@418:                 -> fn [[nm] ~ rest] =>
adamc@418:                       tf1 -> tf2 -> xml ctx [] []) =
adamc@418:     foldUR2 [tf1] [tf2] [fn _ => xml ctx [] []]
adamc@418:             (fn (nm :: Name) (rest :: {Unit}) [[nm] ~ rest] v1 v2 acc =>
adamc@418:                 <xml>{f [nm] [rest] v1 v2}{acc}</xml>)
adamc@418:             <xml/>
adamc@418: 
adamc@336: fun foldTR (tf :: Type -> Type) (tr :: {Type} -> Type)
adamc@356:            (f : nm :: Name -> t :: Type -> rest :: {Type}
adamc@356:                 -> fn [[nm] ~ rest] =>
adamc@356:                       tf t -> tr rest -> tr ([nm = t] ++ rest))
adamc@356:            (i : tr []) =
adamc@356:     fold [fn r :: {Type} => $(mapTT tf r) -> tr r]
adamc@356:              (fn (nm :: Name) (t :: Type) (rest :: {Type}) (acc : _ -> tr rest)
adamc@356:                               [[nm] ~ rest] r =>
adamc@356:                  f [nm] [t] [rest] r.nm (acc (r -- nm)))
adamc@356:              (fn _ => i)
adamc@336: 
adamc@339: fun foldT2R (tf :: (Type * Type) -> Type) (tr :: {(Type * Type)} -> Type)
adamc@367:             (f : nm :: Name -> t :: (Type * Type) -> rest :: {(Type * Type)}
adamc@367:                  -> fn [[nm] ~ rest] =>
adamc@367:                        tf t -> tr rest -> tr ([nm = t] ++ rest))
adamc@367:             (i : tr []) =
adamc@356:     fold [fn r :: {(Type * Type)} => $(mapT2T tf r) -> tr r]
adamc@356:              (fn (nm :: Name) (t :: (Type * Type)) (rest :: {(Type * Type)})
adamc@356:                               (acc : _ -> tr rest) [[nm] ~ rest] r =>
adamc@356:                  f [nm] [t] [rest] r.nm (acc (r -- nm)))
adamc@356:              (fn _ => i)
adamc@339: 
adamc@330: fun foldTR2 (tf1 :: Type -> Type) (tf2 :: Type -> Type) (tr :: {Type} -> Type)
adamc@367:             (f : nm :: Name -> t :: Type -> rest :: {Type}
adamc@367:                  -> fn [[nm] ~ rest] =>
adamc@367:                        tf1 t -> tf2 t -> tr rest -> tr ([nm = t] ++ rest))
adamc@367:             (i : tr []) =
adamc@356:     fold [fn r :: {Type} => $(mapTT tf1 r) -> $(mapTT tf2 r) -> tr r]
adamc@356:              (fn (nm :: Name) (t :: Type) (rest :: {Type})
adamc@356:                               (acc : _ -> _ -> tr rest) [[nm] ~ rest] r1 r2 =>
adamc@356:                  f [nm] [t] [rest] r1.nm r2.nm (acc (r1 -- nm) (r2 -- nm)))
adamc@356:              (fn _ _ => i)
adamc@332: 
adamc@356: fun foldT2R2 (tf1 :: (Type * Type) -> Type) (tf2 :: (Type * Type) -> Type)
adamc@356:              (tr :: {(Type * Type)} -> Type)
adamc@356:              (f : nm :: Name -> t :: (Type * Type) -> rest :: {(Type * Type)}
adamc@356:                   -> fn [[nm] ~ rest] =>
adamc@356:                         tf1 t -> tf2 t -> tr rest -> tr ([nm = t] ++ rest))
adamc@356:              (i : tr []) =
adamc@356:     fold [fn r :: {(Type * Type)} => $(mapT2T tf1 r) -> $(mapT2T tf2 r) -> tr r]
adamc@356:              (fn (nm :: Name) (t :: (Type * Type)) (rest :: {(Type * Type)})
adamc@356:                               (acc : _ -> _ -> tr rest) [[nm] ~ rest] r1 r2 =>
adamc@356:                  f [nm] [t] [rest] r1.nm r2.nm (acc (r1 -- nm) (r2 -- nm)))
adamc@356:              (fn _ _ => i)
adamc@339: 
adamc@336: fun foldTRX (tf :: Type -> Type) (ctx :: {Unit})
adamc@356:             (f : nm :: Name -> t :: Type -> rest :: {Type}
adamc@356:                  -> fn [[nm] ~ rest] =>
adamc@356:                        tf t -> xml ctx [] []) =
adamc@356:     foldTR [tf] [fn _ => xml ctx [] []]
adamc@356:            (fn (nm :: Name) (t :: Type) (rest :: {Type}) [[nm] ~ rest] r acc =>
adamc@356:                <xml>{f [nm] [t] [rest] r}{acc}</xml>)
adamc@360:            <xml/>
adamc@336: 
adamc@339: fun foldT2RX (tf :: (Type * Type) -> Type) (ctx :: {Unit})
adamc@356:              (f : nm :: Name -> t :: (Type * Type) -> rest :: {(Type * Type)}
adamc@356:                   -> fn [[nm] ~ rest] =>
adamc@356:                         tf t -> xml ctx [] []) =
adamc@356:     foldT2R [tf] [fn _ => xml ctx [] []]
adamc@356:             (fn (nm :: Name) (t :: (Type * Type)) (rest :: {(Type * Type)})
adamc@356:                              [[nm] ~ rest] r acc =>
adamc@356:                 <xml>{f [nm] [t] [rest] r}{acc}</xml>)
adamc@360:             <xml/>
adamc@339: 
adamc@332: fun foldTRX2 (tf1 :: Type -> Type) (tf2 :: Type -> Type) (ctx :: {Unit})
adamc@356:              (f : nm :: Name -> t :: Type -> rest :: {Type}
adamc@356:                   -> fn [[nm] ~ rest] =>
adamc@356:                         tf1 t -> tf2 t -> xml ctx [] []) =
adamc@356:     foldTR2 [tf1] [tf2] [fn _ => xml ctx [] []]
adamc@356:             (fn (nm :: Name) (t :: Type) (rest :: {Type}) [[nm] ~ rest]
adamc@356:                              r1 r2 acc =>
adamc@356:                 <xml>{f [nm] [t] [rest] r1 r2}{acc}</xml>)
adamc@360:             <xml/>
adamc@334: 
adamc@356: fun foldT2RX2 (tf1 :: (Type * Type) -> Type) (tf2 :: (Type * Type) -> Type)
adamc@356:               (ctx :: {Unit})
adamc@356:               (f : nm :: Name -> t :: (Type * Type) -> rest :: {(Type * Type)}
adamc@356:                    -> fn [[nm] ~ rest] =>
adamc@356:                          tf1 t -> tf2 t -> xml ctx [] []) =
adamc@356:     foldT2R2 [tf1] [tf2] [fn _ => xml ctx [] []]
adamc@356:              (fn (nm :: Name) (t :: (Type * Type)) (rest :: {(Type * Type)})
adamc@356:                               [[nm] ~ rest] r1 r2 acc =>
adamc@356:                  <xml>{f [nm] [t] [rest] r1 r2}{acc}</xml>)
adamc@360:              <xml/>
adamc@339: 
adamc@356: fun queryX (tables ::: {{Type}}) (exps ::: {Type}) (ctx ::: {Unit})
adamc@356:            (q : sql_query tables exps) [tables ~ exps]
adamc@356:            (f : $(exps ++ fold (fn nm (fields :: {Type}) acc [[nm] ~ acc] =>
adamc@356:                                    [nm = $fields] ++ acc) [] tables)
adamc@356:                 -> xml ctx [] []) =
adamc@356:     query q
adamc@356:           (fn fs acc => return <xml>{acc}{f fs}</xml>)
adamc@360:           <xml/>
adamc@341: 
adamc@356: fun oneOrNoRows (tables ::: {{Type}}) (exps ::: {Type})
adamc@356:                 (q : sql_query tables exps) [tables ~ exps] =
adamc@356:     query q
adamc@356:           (fn fs _ => return (Some fs))
adamc@356:           None