Add deriving Data to Complex

diff --git a/Data/Complex.hs b/Data/Complex.hs
index 749ba91..263b052 100644 (file)
--- a/Data/Complex.hs
+++ b/Data/Complex.hs
@@ -44,6 +44,7 @@ module Data.Complex
 import Prelude
 
 import Data.Typeable
+import Data.Generics.Basics( Data )
 
 #ifdef __HUGS__
 import Hugs.Prelude(Num(fromInt), Fractional(fromDouble))
@@ -62,7 +63,11 @@ infix  6  :+
 data (RealFloat a) => Complex a
   = !a :+ !a   -- ^ forms a complex number from its real and imaginary
                -- rectangular components.
-  deriving (Eq, Read, Show)
+# if __GLASGOW_HASKELL__
+       deriving (Eq, Show, Read, Data)
+# else
+       deriving (Eq, Show, Read)
+# endif
 
 -- -----------------------------------------------------------------------------
 -- Functions over Complex