Re: [boost] [type_traits] Big changes in develop

Do we have to use Typeof in common_type at all? In the cases in which common_type::type is either T or U, can we not find that out by using two overloads? Is this not good enough?

Wouldn't that fail where promotions are involved for example with enum types? In any case this is basically what happens when BOOST_COMMON_TYPE_DONT_USE_TYPEOF and BOOST_NO_CXX11_DECLTYPE are set. I didn't write this one, so to be honest, I'm not sure what's lost in that situation - type registration, better support for older MSVC? John.