gCons.icl

   1 implementation module gCons
   2
   3 /*
   4         Pieter Koopman 2015
   5         pieter@cs.ru.nl
   6         Radboud University, Nijmegen, The Netherlands
   7         ARDSL project
   8 */
   9
  10 import StdEnv, StdGeneric, GenBimap, _SystemStrictLists
  11
  12 generic consName a :: a -> String
  13 consName{|CONS of {gcd_name}|} f x = gcd_name
  14 consName{|UNIT|}   _ = "UNIT"
  15 consName{|PAIR|}   f g (PAIR x y) = f x
  16 consName{|EITHER|} f g (LEFT x)   = f x
  17 consName{|EITHER|} f g (RIGHT y)  = g y
  18 consName{|OBJECT|} f   (OBJECT x) = f x
  19 consName{|RECORD|} f   (RECORD x) = f x
  20 consName{|FIELD|}  f   (FIELD x)  = f x
  21 consName{|Int|}        i = toString i
  22 consName{|Bool|}       b = toString b
  23 consName{|Char|}       c = toString c
  24 consName{|String|}     s = s
  25 consName{|(->)|}   f g x = g (x undef)
  26
  27 generic consIndex a :: a -> Int
  28 consIndex{|CONS of {gcd_index}|} f x = gcd_index
  29 consIndex{|UNIT|} _ = 0
  30 consIndex{|PAIR|} f g (PAIR x y) = f x
  31 consIndex{|EITHER|} f g (LEFT x) = f x
  32 consIndex{|EITHER|} f g (RIGHT y) = g y
  33 consIndex{|OBJECT|} f (OBJECT x) = f x
  34 consIndex{|Int|} i = i
  35 consIndex{|Bool|} b = if b 1 0
  36 consIndex{|Char|} c = toInt c
  37 consIndex{|String|} _ = 0
  38
  39 conses :: [a] | gconses{|*|} a
  40 conses = gconses{|*|} True
  41
  42 generic gconses a :: Bool -> [a]
  43 gconses{|CONS|} f True = map CONS (f False)
  44 gconses{|CONS|} f b = [CONS (hd (f b))]
  45 gconses{|UNIT|} _ = [UNIT]
  46 gconses{|PAIR|} f g _ = []
  47 gconses{|EITHER|} f g b = map LEFT (f b) ++ map RIGHT (g b)
  48 gconses{|OBJECT|} f b = map OBJECT (f b)
  49 gconses{|RECORD|} f b = map RECORD (f b)
  50 gconses{|FIELD|} f b = map FIELD (f b)
  51 gconses{|Int|} _ = [0]
  52 gconses{|Bool|} _ = [True]
  53 gconses{|Char|} _ = ['\0']
  54 gconses{|Real|} _ = [0.0]
  55 gconses{|String|} _ = [""]
  56 gconses{|[]|} _ _ = [[ ]]
  57 gconses{|[!]|} _ _ = [[!]]
  58 gconses{|[ !]|} _ _ = [[ !]]
  59 gconses{|[!!]|} _ _ = [[!!]]
  60 gconses{|{}|} _ _ = [{}]
  61 gconses{|{!}|} _ _ = [{!}]
  62 gconses{|()|} _ = [()]
  63 gconses{|(->)|} _ _ _ = [const undef]