ayacc
Free On-line Dictionary of Computing
ayacc
<language, tool> A Yacc-like parser generator developed at the Irvine Research Unit in Software around 1994. ayacc was written in Ada and produces Ada output. aflex was the associated lexical analyser.
(http://www.ics.uci.edu/~arcadia/Aflex-Ayacc/aflex-ayacc.html)
(2018-01-13)