public domain Berkeley LALR Yacc parser generator

 This package provides a parser generator utility that reads a grammar
 specification from a file and generates an LR(1) parser for it. The
 parsers consist of a set of LALR(1) parsing tables and a driver
 routine written in the C programming language. It has a public domain
 license which includes the generated C.
 .
 This package has the backtracking extension, adapted from btyacc.
 .
 Related packages: bison, btyacc, antlr