[Haskell-cafe] aeson-0.6.1.0 deriveJSON error

[Bas van Dijk]

On 26 January 2013 14:47,  <jims at stuttard.org> wrote:
> ghc doesn't seem to be unifying deriveJSON (String->String)
> parameter with id :: a -> a.

It seems you're using aeson HEAD. Note that the deriveJSON from the
released aeson-0.6.1.0 as the type:

  deriveJSON :: (String -> String) -> Name -> Q [Dec]

But in aeson-HEAD it has the following type:

  deriveJSON :: Options -> Name -> Q [Dec]

Cheers,

Bas