On Sun, 26 Jun 2011 17:32:02 -0400
David Place
On Jun 26, 2011, at 4:59 PM, Manfred Lotz wrote:
Is there any problem in the code snippet I pasted? If so I would like to get a hint of course.
There really isn't enough code in your snippet to be able to say. The rule is that if you return a lazy data structure from withFile you may find the file has been closed before you have read the data. If your parseXMLDoc is strict then you will get away with it. I feel that isn't very nice.
What I had learned (and it seems to work fine) is to force the result which gets done here in return $! insertXml (stat, m) xf = U.withBinaryFile xf ReadMode (\handle -> do ct <- getXmlContent xf handle ... some code... return $! (stat',m')) So I hope that is the one and important recipe to add when using withBinaryFile. -- Manfred