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Integer arithmetic in Haskell

  1. Dec 28, 2004 #1
    Can anybody explain what appear to be discrepancies in the way the following expressions are interpreted by Hugs (Haskell98 mode) ?

    Code (Text):

    Main> div -6 4
    ERROR - Cannot infer instance
    *** Instance   : Num (b -> a -> a -> a)
    *** Expression : div - fromInt 6 4

    Main> div (-6) 4
    -2
    Main> -6 `div` 4
    -1
    Main> (-6) `div` 4
    -2
     
     
  2. jcsd
  3. Dec 28, 2004 #2
    Never mind.

    I guess it must be right-associative, so -6 `div` 4 is interpreted as -(6 `div` 4).
     
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