Hello First of all I'd like to say that I like vector-space and vector-space-opengl is something that I'd like to use together with OpenGL. So while using that library I found some things that can be useful for others, I think. While looking into OpenGL/TH.hs I found that it quite incomplete and I understand why. That suggestion at stackoverflow results in a bit boilerplate code: deriveScalar, deriveScalarAdditiveGroup, deriveScalarVectorSpace, deriveScalarAffineSpace :: [Name] -> Q [Dec] deriveScalar ts = concat <$> forM decls (\qf -> qf ts) where decls = [ deriveScalarAdditiveGroup , deriveScalarVectorSpace , deriveScalarAffineSpace , deriveScalarInnerSpace ] deriveScalarVectorSpace ts = concat <$> mapM f ts where f tn = do t <- [t| $(conT tn) |] vs <- [t| VectorSpace |] (AppT (ConT s) _) <- [t| Scalar () |] -- dummy type to extract Scalar name (VarE h) <- [e| (*^) |] -- refer to actual (*^) from VectorSpace e <- [e| (*) |] -- (*) from Num return [ InstanceD [] (AppT vs t) [ TySynInstD s [t] t, ValD (VarP h) (NormalB e) [] ]] It's kinda partially checked and partially constructed. BTW, rather than depending on OpenGL its better to use Graphics.Rendering.OpenGL.Raw I think. Also there is types GLclampd and GLclampf (I suspect that they somehow related with OpenCL). While scalar types doesn't differ whether they are absolute whether they are not. Data.Tensor makes difference between Vertex and Vector. I suspect that made especially for this case: instance AffineSpace a => AffineSpace (Vertex2 a) where type Diff (Vertex2 a) = Vector2 (Diff a) I.e. Diff Vertex shouldn't be Vertex and Vertex a should not belong to AdditiveGroup If anyone knows how to walk through the whole module in monad Q that might bring more power to this library. I.e. walk through OpenGL.Raw and make declarations for all its scalar types. Thank you