I can understand where you're coming from, and that's usually what I would tell other people, but I asked this questions for three reasons: First, I am at the same level of comfort with all of them, which is to say barely at all; Second, I've never dealt with formal parsing in Perl, so this was kind of asking where to start from; and last, I think it could be an interesting discussion.

Maybe I should put the discussion part somewhere else, but I'm fairly new to PerlMonks too, so have no idea where, or how.