adamc@623
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1 (** Row folding *)
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adamc@623
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2
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adamc@623
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3 con folder = K ==> fn r :: {K} =>
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adamc@623
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4 tf :: ({K} -> Type)
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adamc@623
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5 -> (nm :: Name -> v :: K -> r :: {K} -> tf r
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adamc@629
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6 -> [[nm] ~ r] => tf ([nm = v] ++ r))
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adamc@623
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7 -> tf [] -> tf r
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adamc@623
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8
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adamc@627
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9 structure Folder = struct
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adamc@627
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10 fun nil K (tf :: {K} -> Type)
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adamc@627
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11 (f : nm :: Name -> v :: K -> r :: {K} -> tf r
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adamc@629
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12 -> [[nm] ~ r] => tf ([nm = v] ++ r))
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adamc@627
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13 (i : tf []) = i
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adamc@627
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14
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adamc@627
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15 fun cons K (r ::: {K}) (nm :: Name) (v :: K) [[nm] ~ r] (fold : folder r)
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adamc@627
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16 (tf :: {K} -> Type)
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adamc@627
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17 (f : nm :: Name -> v :: K -> r :: {K} -> tf r
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adamc@629
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18 -> [[nm] ~ r] => tf ([nm = v] ++ r))
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adamc@629
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19 (i : tf []) = f [nm] [v] [r] (fold [tf] f i) !
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adamc@628
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20
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adamc@628
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21 fun concat K (r1 ::: {K}) (r2 ::: {K}) [r1 ~ r2]
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adamc@628
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22 (f1 : folder r1) (f2 : folder r2)
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adamc@628
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23 (tf :: {K} -> Type)
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adamc@628
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24 (f : nm :: Name -> v :: K -> r :: {K} -> tf r
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adamc@629
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25 -> [[nm] ~ r] => tf ([nm = v] ++ r))
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adamc@628
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26 (i : tf []) =
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adamc@629
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27 f1 [fn r1' => [r1' ~ r2] => tf (r1' ++ r2)]
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adamc@629
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28 (fn (nm :: Name) (v :: K) (r1' :: {K}) (acc : [r1' ~ r2] => tf (r1' ++ r2))
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adamc@628
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29 [[nm] ~ r1'] [[nm = v] ++ r1' ~ r2] =>
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adamc@629
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30 f [nm] [v] [r1' ++ r2] acc !)
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adamc@629
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31 (fn [[] ~ r2] => f2 [tf] f i) !
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adamc@627
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32 end
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adamc@627
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33
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adamc@623
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34
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adamc@422
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35 fun not b = if b then False else True
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adamc@422
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36
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adamc@356
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37 con idT (t :: Type) = t
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adamc@356
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38 con record (t :: {Type}) = $t
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adamc@356
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39 con fstTT (t :: (Type * Type)) = t.1
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adamc@356
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40 con sndTT (t :: (Type * Type)) = t.2
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adamc@445
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41 con fstTTT (t :: (Type * Type * Type)) = t.1
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adamc@445
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42 con sndTTT (t :: (Type * Type * Type)) = t.2
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adamc@445
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43 con thdTTT (t :: (Type * Type * Type)) = t.3
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adamc@329
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44
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adamc@621
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45 con mapUT = fn f :: Type => map (fn _ :: Unit => f)
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adamc@445
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46
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adamc@339
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47 con ex = fn tf :: (Type -> Type) =>
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adamc@356
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48 res ::: Type -> (choice :: Type -> tf choice -> res) -> res
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adamc@339
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49
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adamc@339
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50 fun ex (tf :: (Type -> Type)) (choice :: Type) (body : tf choice) : ex tf =
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adamc@356
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51 fn (res ::: Type) (f : choice :: Type -> tf choice -> res) =>
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adamc@356
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52 f [choice] body
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adamc@339
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53
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adamc@356
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54 fun compose (t1 ::: Type) (t2 ::: Type) (t3 ::: Type)
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adamc@356
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55 (f1 : t2 -> t3) (f2 : t1 -> t2) (x : t1) = f1 (f2 x)
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adamc@325
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56
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adamc@564
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57 fun txt (t ::: Type) (ctx ::: {Unit}) (use ::: {Type}) (_ : show t) (v : t) =
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adamc@564
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58 cdata (show v)
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adamc@328
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59
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adamc@411
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60 fun foldUR (tf :: Type) (tr :: {Unit} -> Type)
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adamc@411
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61 (f : nm :: Name -> rest :: {Unit}
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adamc@629
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62 -> [[nm] ~ rest] =>
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adamc@411
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63 tf -> tr rest -> tr ([nm] ++ rest))
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adamc@623
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64 (i : tr []) (r ::: {Unit}) (fold : folder r)=
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adamc@411
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65 fold [fn r :: {Unit} => $(mapUT tf r) -> tr r]
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adamc@623
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66 (fn (nm :: Name) (t :: Unit) (rest :: {Unit}) acc
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adamc@623
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67 [[nm] ~ rest] r =>
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adamc@629
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68 f [nm] [rest] ! r.nm (acc (r -- nm)))
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adamc@623
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69 (fn _ => i)
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adamc@411
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70
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adamc@418
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71 fun foldUR2 (tf1 :: Type) (tf2 :: Type) (tr :: {Unit} -> Type)
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adamc@418
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72 (f : nm :: Name -> rest :: {Unit}
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adamc@629
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73 -> [[nm] ~ rest] =>
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adamc@418
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74 tf1 -> tf2 -> tr rest -> tr ([nm] ++ rest))
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adamc@623
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75 (i : tr []) (r ::: {Unit}) (fold : folder r) =
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adamc@418
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76 fold [fn r :: {Unit} => $(mapUT tf1 r) -> $(mapUT tf2 r) -> tr r]
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adamc@623
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77 (fn (nm :: Name) (t :: Unit) (rest :: {Unit}) acc
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adamc@623
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78 [[nm] ~ rest] r1 r2 =>
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adamc@629
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79 f [nm] [rest] ! r1.nm r2.nm (acc (r1 -- nm) (r2 -- nm)))
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adamc@623
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80 (fn _ _ => i)
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adamc@418
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81
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adamc@418
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82 fun foldURX2 (tf1 :: Type) (tf2 :: Type) (ctx :: {Unit})
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adamc@418
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83 (f : nm :: Name -> rest :: {Unit}
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adamc@629
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84 -> [[nm] ~ rest] =>
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adamc@418
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85 tf1 -> tf2 -> xml ctx [] []) =
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adamc@418
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86 foldUR2 [tf1] [tf2] [fn _ => xml ctx [] []]
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adamc@418
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87 (fn (nm :: Name) (rest :: {Unit}) [[nm] ~ rest] v1 v2 acc =>
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adamc@629
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88 <xml>{f [nm] [rest] ! v1 v2}{acc}</xml>)
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adamc@418
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89 <xml/>
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adamc@418
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90
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adamc@623
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91 fun foldR K (tf :: K -> Type) (tr :: {K} -> Type)
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adamc@623
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92 (f : nm :: Name -> t :: K -> rest :: {K}
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adamc@629
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93 -> [[nm] ~ rest] =>
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adamc@356
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94 tf t -> tr rest -> tr ([nm = t] ++ rest))
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adamc@623
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95 (i : tr []) (r ::: {K}) (fold : folder r) =
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adamc@623
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96 fold [fn r :: {K} => $(map tf r) -> tr r]
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adamc@623
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97 (fn (nm :: Name) (t :: K) (rest :: {K}) (acc : _ -> tr rest)
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adamc@356
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98 [[nm] ~ rest] r =>
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adamc@629
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99 f [nm] [t] [rest] ! r.nm (acc (r -- nm)))
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adamc@356
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100 (fn _ => i)
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adamc@336
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101
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adamc@623
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102 fun foldR2 K (tf1 :: K -> Type) (tf2 :: K -> Type) (tr :: {K} -> Type)
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adamc@623
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103 (f : nm :: Name -> t :: K -> rest :: {K}
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adamc@629
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104 -> [[nm] ~ rest] =>
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adamc@367
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105 tf1 t -> tf2 t -> tr rest -> tr ([nm = t] ++ rest))
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adamc@623
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106 (i : tr []) (r ::: {K}) (fold : folder r) =
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adamc@623
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107 fold [fn r :: {K} => $(map tf1 r) -> $(map tf2 r) -> tr r]
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adamc@623
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108 (fn (nm :: Name) (t :: K) (rest :: {K})
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adamc@623
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109 (acc : _ -> _ -> tr rest) [[nm] ~ rest] r1 r2 =>
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adamc@629
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110 f [nm] [t] [rest] ! r1.nm r2.nm (acc (r1 -- nm) (r2 -- nm)))
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adamc@623
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111 (fn _ _ => i)
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adamc@332
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112
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adamc@623
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113 fun foldRX K (tf :: K -> Type) (ctx :: {Unit})
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adamc@623
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114 (f : nm :: Name -> t :: K -> rest :: {K}
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adamc@629
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115 -> [[nm] ~ rest] =>
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adamc@356
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116 tf t -> xml ctx [] []) =
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adamc@623
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117 foldR [tf] [fn _ => xml ctx [] []]
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adamc@623
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118 (fn (nm :: Name) (t :: K) (rest :: {K}) [[nm] ~ rest] r acc =>
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adamc@629
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119 <xml>{f [nm] [t] [rest] ! r}{acc}</xml>)
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adamc@623
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120 <xml/>
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adamc@336
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121
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adamc@623
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122 fun foldRX2 K (tf1 :: K -> Type) (tf2 :: K -> Type) (ctx :: {Unit})
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adamc@623
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123 (f : nm :: Name -> t :: K -> rest :: {K}
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adamc@629
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124 -> [[nm] ~ rest] =>
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adamc@356
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125 tf1 t -> tf2 t -> xml ctx [] []) =
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adamc@623
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126 foldR2 [tf1] [tf2] [fn _ => xml ctx [] []]
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adamc@623
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127 (fn (nm :: Name) (t :: K) (rest :: {K}) [[nm] ~ rest]
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adamc@623
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128 r1 r2 acc =>
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adamc@629
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129 <xml>{f [nm] [t] [rest] ! r1 r2}{acc}</xml>)
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adamc@623
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130 <xml/>
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adamc@445
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131
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adamc@356
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132 fun queryX (tables ::: {{Type}}) (exps ::: {Type}) (ctx ::: {Unit})
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adamc@356
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133 (q : sql_query tables exps) [tables ~ exps]
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adamc@621
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134 (f : $(exps ++ map (fn fields :: {Type} => $fields) tables)
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adamc@356
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135 -> xml ctx [] []) =
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adamc@356
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136 query q
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adamc@356
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137 (fn fs acc => return <xml>{acc}{f fs}</xml>)
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adamc@360
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138 <xml/>
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adamc@341
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139
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adamc@469
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140 fun queryX' (tables ::: {{Type}}) (exps ::: {Type}) (ctx ::: {Unit})
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adamc@469
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141 (q : sql_query tables exps) [tables ~ exps]
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adamc@621
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142 (f : $(exps ++ map (fn fields :: {Type} => $fields) tables)
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adamc@469
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143 -> transaction (xml ctx [] [])) =
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adamc@469
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144 query q
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adamc@469
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145 (fn fs acc =>
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adamc@469
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146 r <- f fs;
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adamc@469
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147 return <xml>{acc}{r}</xml>)
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adamc@469
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148 <xml/>
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adamc@469
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149
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adamc@356
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150 fun oneOrNoRows (tables ::: {{Type}}) (exps ::: {Type})
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adamc@629
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151 [tables ~ exps]
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adamc@629
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152 (q : sql_query tables exps) =
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adamc@356
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153 query q
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adamc@356
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154 (fn fs _ => return (Some fs))
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adamc@356
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155 None
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adamc@440
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156
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adamc@440
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157 fun oneRow (tables ::: {{Type}}) (exps ::: {Type})
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adamc@629
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158 [tables ~ exps] (q : sql_query tables exps) =
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adamc@440
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159 o <- oneOrNoRows q;
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adamc@440
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160 return (case o of
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adamc@440
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161 None => error <xml>Query returned no rows</xml>
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adamc@440
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162 | Some r => r)
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adamc@440
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163
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adamc@470
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164 fun eqNullable (tables ::: {{Type}}) (agg ::: {{Type}}) (exps ::: {Type})
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adamc@470
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165 (t ::: Type) (_ : sql_injectable (option t))
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adamc@470
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166 (e1 : sql_exp tables agg exps (option t))
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adamc@470
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167 (e2 : sql_exp tables agg exps (option t)) =
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adamc@471
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168 (SQL ({e1} IS NULL AND {e2} IS NULL) OR {e1} = {e2})
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adamc@470
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169
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adamc@470
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170 fun eqNullable' (tables ::: {{Type}}) (agg ::: {{Type}}) (exps ::: {Type})
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adamc@564
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171 (t ::: Type) (_ : sql_injectable (option t))
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adamc@470
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172 (e1 : sql_exp tables agg exps (option t))
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adamc@470
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173 (e2 : option t) =
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adamc@470
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174 case e2 of
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adamc@471
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175 None => (SQL {e1} IS NULL)
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adamc@564
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176 | Some _ => sql_binary sql_eq e1 (sql_inject e2)
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