[boost] Variadic to Head/Tail TMP List

Hi, Is this piece of code useful ? http://pastebin.com/tRrqVHTw The purpose is to tranform code like the following: typedef cons<int, cons<float, cons<char, cons<string>>>> t0; // fusion::cons or similar data structures in typedef chain_generator<cons, nil> cons_gen; typedef cons_gen::gen<int, float, char, std::string>::type t1; I don't know if there is something similar in a library. I think it could be useful. Compiler tests: GCC 4.7 -> Compiler Error GCC 4.7.1 & Trunk -> OK http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53108 Clang Trunk -> OK MSVC 11 beta -> has no Variadic Templates Regards, FP.