Hi, I believe, the module containing the function summation needs a header. If I add a header, the parse error disappears. This problem may be explained by [1], where the description probably implies that there is a module header. I hope that helps, Nikita [1] http://www.haskell.org/haddock/doc/html/ch03s03.html On 19/03/13 07:41, Christopher Howard wrote:
Hi. I tried to run haddock on a file with this content:
code: -------- {-| The 'summation' function provides the same function as summation or sigma notation. The first argument the starting index number. The second argument is the ending index number. The third argument is a function representing the formula for each term. -} summation :: (Eq a, Num a1, Num a) => a -> a -> (a -> a1) -> a1 summation i n f | i == n = f i | otherwise = f i + summation (i + 1) n f
...snip... --------
And I get
quote: -------- $ haddock summation.hs
summation.hs:7:1: parse error on input `summation' --------
What is wrong with it? (The code runs fine with GHC.)
$ haddock --version Haddock version 2.10.0, (c) Simon Marlow 2006 Ported to use the GHC API by David Waern 2006-2008
$ ghc --version The Glorious Glasgow Haskell Compilation System, version 7.4.1
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