[Hs-Generics] gdiff-ig package difficult to use

[Christopher Done]

>From the haddocks API of gdiff-ig it seems that you can’t actually use
it for something useful:

http://hackage.haskell.org/package/gdiff-ig-0.1.1

The EditScript type is not exported. Thought someone might want to fix
it. There is a test suite using the package:

http://hackage.haskell.org/package/gdiff-ig-0.1.1/src/examples/Test.hs

But it doesn’t actually inspect EditScript, it just uses its equality instance.

You can only use it with patch, but in order to get a EditScript you
need both values, so there’s no point in doing let p = diff a b in
patch p a, you might as well just use b. And EditScript can’t be
serialized.

Ciao!