In his message of Thu November 30, 2000, Laurent Reveillere writes: 
> I have to build a lexer/parser for the ANSI C language.
> Does anyone now if such a tool exists in OCAML?

I  don't know  of  such a  lexer/parser. But  you  can find  a lot  of
lex/yacc grammars  for ANSI C on  the web, which can  be easily turned
into ocamllex/ocamlyacc grammars. Here is such a site:

     http://www.lysator.liu.se/c/ANSI-C-grammar-y.html

Hope this helps,
-- 
Jean-Christophe FILLIATRE
  mailto:Jean-Christophe.Filliatre@lri.fr
  http://www.lri.fr/~filliatr