2009/2/6 Alistair Bayley
[1 of 1] Compiling Test.Fail ( Test\Fail.hs, Test\Fail.o )
Test\Fail.hs:11:26: Can't make a derived instance of `Typeable Fail' (You need -XDeriveDataTypeable to derive an instance for this class) In the data type declaration for `Fail'
Are you processing the above module but it is called Test.Fail in reality? Have you stripped out a deriving statement from the example above? I'm very confused by this message :)
Sorry, my mistake. I pasted the error message from a different problem. This is the error I get from haddock:
C:\bayleya\eclipse\workspace\takusen\src>haddock -h --odir=doc Test/Haddock.lhs Cannot find documentation for: $named_block
Okay, then I understand. My guess is (without looking at ghc code) that ghc just throws the literate comments away before lexing the file. This means that the Haddock comments won't be recognized. As you say, there is also an unlitter in Cabal. I don't remember if it is invoked when using Haddock 2, but if it is, it would solve this problem. David