Do you get better results instead of making the parser into a pipe, you use
something like this (named for the similar operation in
`pipes-attoparsec`). It might reduce to more fundamental pipes-parse
things, I'm not sure:
parsed :: Monad m
=> PP.Parser a m (Maybe b)
-> Producer a m r
-> Producer b m (Producer a m r)
parsed (StateT s) = loop where
loop p = do
(a,rest) <- lift (s p)
case a of
Nothing -> return rest
Just b -> do
yield b
loop rest
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