Boost C++ Libraries: Ticket #12703: BOOST_MPL_ASSERT_MSG cannot be used in constexpr functions https://svn.boost.org/trac10/ticket/12703 <p> The current implementation of BOOST_MPL_ASSERT_MSG use a static const std::size_t varieble that cannot be used in constexpr functions. I think this can be replaced by an enum declare. why use static const varieble? </p> en-us Boost C++ Libraries /htdocs/site/boost.png https://svn.boost.org/trac10/ticket/12703 Trac 1.4.3