#8539: Data.Complex shouldn't use default implementation of (**) -------------------------------------+------------------------------------- Reporter: jjaredsimpson | Owner: Type: bug | Status: patch Priority: low | Milestone: Component: Prelude | Version: 7.6.3 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Unknown/Multiple Type of failure: Incorrect result | Difficulty: Easy (less than 1 at runtime | hour) Test Case: | Blocked By: Blocking: | Related Tickets: -------------------------------------+------------------------------------- Comment (by yalas): We can also add special case for raising to 1 to increase accuracy: {{{ Prelude Data.Complex> exp $ log (1:+2) * (1:+0) :: Complex Double 0.9999999999999998 :+ 2.0000000000000004 }}} By adding this line: {{{ x ** (1:+0) = x }}} But I'm not sure. Is it necessary? This function already has 3 definitions. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/8539#comment:9 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler