Hi all,

     I am trying to develop a tool which allows the user to use regular 
expression to only keep the lines matching the given pattern in the output. 
There are many special characters, e.g. \ in \d. In the perl script the wrapper 
invokes, the regular expression is printed as Xd+ for the regular expression 
\d+. My question is how to pass these special characters including \, (, ), ^ 
etc. correctly into the perl script.

Best regards!
Jun
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