🚀 go-pugleaf

hi,

I have some questions concerning Yacc and Lex. I can get a copy of these
programs and was wondering if someone could help.

  1. Are these programs in the Public Domain? I couldn't find a copyright
     message, but this is usual in the Unix-world. If the answer is no, then
     please say so and please don't be abused by the following questions.
     (I will then delete everything.)

  2. I tried the programs Lex and Yacc generated to compile with MWC and
     Megamax, but both complied. For which compiler are these utilities
     meant?

  3. Perhaps the reason they wouldn't compile is missing files. The files
     I have are:

        lex\ ncform          4594 bytes
             nrform          3114 bytes
        lex.a                2501 bytes
        lex.prg             57527 bytes

        yacc.ttp           102681 bytes
        yaccpar              8524 bytes
        yyerror.bin           246 bytes

  4. Are these the latest versions of Lex and Yacc. If not where can I find
     the latest versions?

                                           Many thanks in advance,

                                                Sietze