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module PreludeBuiltin where
--- 0-tuple (trivial type "()" ) ---------------------------------
import Cls
import Core
import IChar
import IList
import List ( (++), foldr )
import PS ( _PackedString, _unpackPS )
import Text
instance Eq () where
() == () = True
() /= () = False
instance Ord () where
() <= () = True
() < () = False
() >= () = True
() > () = False
max () () = ()
min () () = ()
_tagCmp () () = _EQ
instance Text () where
readsPrec p = readParen False
(\r -> [((),t) | ("(",s) <- lex r,
(")",t) <- lex s ] )
showsPrec p () = showString "()"
instance Ix () where
range ((), ()) = [()]
index ((), ()) () = 0
inRange ((), ()) () = True
instance Enum () where
enumFrom () = [()]
enumFromThen () () = [()]
enumFromTo () () = [()]
enumFromThenTo () () () = [()]
-- ToDo: something for Binary
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