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Diffstat (limited to 'src/Haddock/Utils.hs')
| -rw-r--r-- | src/Haddock/Utils.hs | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/src/Haddock/Utils.hs b/src/Haddock/Utils.hs index 18d56c51..5bdae25f 100644 --- a/src/Haddock/Utils.hs +++ b/src/Haddock/Utils.hs @@ -37,6 +37,7 @@ module Haddock.Utils ( -- * List utilities replace, + spanWith, -- * MTL stuff MonadIO(..), @@ -325,6 +326,11 @@ html_xrefs = unsafePerformIO (readIORef html_xrefs_ref) replace :: Eq a => a -> a -> [a] -> [a] replace a b = map (\x -> if x == a then b else x) +spanWith :: (a -> Maybe b) -> [a] -> ([b],[a]) +spanWith p [] = ([],[]) +spanWith p xs@(a:as) + | Just b <- p a = let (bs,cs) = spanWith p as in (b:bs,cs) + | otherwise = ([],xs) ----------------------------------------------------------------------------- -- put here temporarily |