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a question about csv parser

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Hi,
I have a question about csv parser.
For most of the codes I can search(including lpeg and
even python's module), they show how to break a
"record" or csv line into fields.
Now if I have a file like the following :
"this is a field with \r\n", 2, 3 \r\n
normal, 2, 3 \r\n
how do I read the correct line as the quoted \r\n
would not be treated specially by io:lines(), I
assume.
 
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