This directory contains grammar files in Bison and Wisent, used to
generate the parser data in the lisp/semantic/bovine/ and
lisp/semantic/wisent/ directories. You can run the parser generators
with
emacs -batch -Q -l bovine-grammar.el -f bovine-make-parsers
emacs -batch -Q -l wisent-grammar.el -f wisent-make-parsers
Currently, the parser files in lisp/ are not generated directly from
these grammar files when making Emacs. This state of affairs, and the
contents of this directory, will change in a future version of Emacs.