Re: [boost] Clang 4.0.0 MPL error in Boost next.hpp and prior.hpp

I'm also telling you that since BOOST_PP_VARIADICS_MSVC=1 never works with any Clang, there is perhaps no reason to ever set it to 1 regardless of what Clang it is and what options have been defined.

Unless of course BOOST_PP_VARIADICS_MSVC=1 works on some Clang configurations - you know better than me if that's the case, but I was left with the impression that you consider Clang in -fms-compatibility mode hopelessly broken.