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module Comments where
-- comment removal : line tails prefixed by -- as well as chunks in {- ... -}
remComments :: String -> String
remComments s =
case s of
'"':s2 -> '"':pass remComments s2 -- comment marks in quotes not removed!
'{':'-':cs -> readNested cs
'-':'-':cs -> readTail cs
c:cs -> c : remComments cs
[] -> []
where
readNested t =
case t of
'"':s2 -> '"':pass readNested s2
'-':'}':cs -> remComments cs
_:cs -> readNested cs
[] -> []
readTail t =
case t of
'\n':cs -> '\n':remComments cs
_:cs -> readTail cs
[] -> []
pass f t =
case t of
'"':s2 -> '"': f s2
c:s2 -> c:pass f s2
_ -> t
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