Re: [boost] [type traits extension] test for const volatile& as return type

template <class T> void g(T) { std::cout<<"g(T)\n"; } ?

I cannot use that because I want in that particular case g(...) be chosen.

I think you need to reproduce your exact case. Your code above can not tell anyone what is actually going on.

I maybe forgot to say that I want g(...) to be chosen for T=const int&. Frédéric