ANSI C Yacc grammar (This Yacc file is accompanied by a matching Lex file.) In 1985, Jeff Lee published his Yacc grammar based on a draft version of the ANSI C standard, along with a supporting Lex specification. Tom Stockfisch reposted those files to net.sources in 1987; as mentioned in the answer to question 17.25 of the comp.lang.c FAQ, they used to be available from ftp.uu.net as usenet/net.so