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