> Could somebody tell me if a specification of the GNU ANSI C++ grammar > is somewhere available on the gcc site ? Try: http://www.parashift.com/c++-faq-lite/compiler-dependencies.html#faq-38.11 which links to: http://www.computing.surrey.ac.uk/research/dsrg/fog/CxxGrammar.y A general web search will also turn up a few other candidates. I haven't tested the standard conformance of the grammar yet, although it punts some things until the semantic actions and checking. Maybe someone else experienced with it can comment. Fang