Re: [Haskell-cafe] "doctest" for haskell -- a good project?

Hi

One idea that does strike me is that it would be super useful to have the ability in ghci to extract the haddocks associated with a function.

> :doc map

would result in:

-- | 'map' @f xs@ is the list obtained by applying @f@ to each element -- of @xs@, i.e., -- -- > map f [x1, x2, ..., xn] == [f x1, f x2, .. -- > map f [x1, x2, ...] == [f x1, f x2, ...]

That will be in Hoogle 4, as it does already directly relate to what Hoogle has to do. As for doctest, i think that could be implemented as a --warn flag to Haddock, and might be a useful thing to have. For example "90% of the base library has documentation, please go add documentation to 'sinh'", as a warning message. Thanks Neil