Storable instance for Complex

I propose that the following instance be added to base: instance (RealFloat a, Storable a) => Storable (Complex a) where sizeOf z = 2 * sizeOf (realPart z) alignment z = sizeOf (realPart z) peek p = do [r,i] <- peekArray 2 (castPtr p) return (r :+ i) poke p (r :+ i) = pokeArray (castPtr p) [r,i] This instance is binary compatible with C99, C++ and Fortran complex types. It is currently needed by at least two independent packages: hmatrix and fft. Since it is natural for user code to use both of these packages, we need to move the instance to a common location. http://hackage.haskell.org/trac/ghc/ticket/2099 Jed