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Sh4pe/pattern matches overlapped

Last active March 7, 2017 21:39
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pattern matches overlapped
concatLeft :: Char -> C.ByteString -> C.ByteString
concatLeft delim a = go $ C.uncons a
where bsa = C.singleton delim
go Nothing = bsa
go (Just (delim, r)) = concatLeft delim r
go (Just (x, r)) = C.concat [bsa, r]
-- Warning:
-- Pattern match(es) are overlapped
-- In an equation for ‘go’: go (Just (x, r)) = ...
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