Missing documentation when there is no signature

[tommd]

Take the below code as an example:

module Test
        ( func
        ) where

-- | An internal value
value = 1

-- |An exported function
func = (+) value

Notice there is no haddock documentation when the signature for "func" is missing!

[waern]

What happens here is that func shows up but without the doc string. This is due to the fact that we have never properly implemented support for declarations without type signatures. The reason that they show up in the documentation at all nowadays is a side effect of Isaac Dupree's work on cross-package documentation. More work is needed to ensure we properly support these declarations.