grammar parsers

I want to made a simple programming language, what should I use for parsing:

1. lex + yacc
2. lemon
3. parsec
4. other (what?)

>>11
No. I didn't published it yet, but it is intended as a scripting language on top of Common Lisp (just as Lua for C/C++), so I can use SBCL as a replacement for BASH. Some time ago I wanted to do Lisp-centered Linux distro, maybe I will return to this idea and release it with this language.