Parse::RecDescent has its place, but even its author
opted for YAPP when doing the parsing for
Lingua::Romana::Perligata for reasons discussed in
last year's Perl 5 Conference.
Top-down parsing is good for changing the overall structure
of parse phrasing. Bottom up makes hardcore tokenizing easier,
and that's why Damian opted for a module other than even his
own in this case.
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