Re: [boost] [core] Move underlying_type to type_traits?

Andrey Semashev wrote:

Perhaps boost/core/underlying_type.hpp should be moved to Boost.TypeTraits?

Not sure what we'd gain from that. Ideally, it will be moved to the core type traits, one day. In the meantime, since it's in core/, it'd be nice if it can acquire a test. :-) Ditto for scoped_enum.