http://www.fmi.uni-passau.de/archive/doc/unix/perl/faq/1.22.html (Einblicke ins Internet, 10/1995)
Yes!! It's a version of Berkeley yacc that outputs Perl code instead
of C code! You can get this from ftp.sterling.com [192.124.9.1] in
/local/perl-byacc1.8.1.tar.Z, or send the author mail for details.