Source filters are bad because you can't look at the code and tell what it is going to do. The filter turns other things, including something that might look like a comment, into behavior. That's a maintenance nightmare.
The difficulty in parsing Perl is a red herring. Even if Perl was easy to parse source filter based code is hard to maintain.
In reply to Re: question regarding using Switch.pm in production use
by brian_d_foy
in thread question regarding using Switch.pm in production use
by jfroebe
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