# byacc Berkeley Yacc (byacc) is generally conceded to be the best yacc variant available. In contrast to bison, it is written to avoid dependencies upon a particular compiler. Byacc was written around 1990 by Robert Corbett who is the original author of bison. Originally written in K&R C, I have modified it to conform to ANSI C, and made other improvements. See the changelog for details.