http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50864
--- Comment #3 from fate66260 at gmail dot com 2011-10-25 15:00:06 UTC --- Thank you for your response. wrong: allow_dereferencable right: allow_operable mpl::true_, mpl::false_ are included in <boost/mpl/bool.hpp> std::declval ... <utility> The same result in the all cases.
