id summary reporter owner description type status milestone component version severity resolution keywords cc 6979 constexpr support in MPL anonymous Aleksey Gurtovoy C++11 introduced generalized constant expression with the constexpr keyword. It would be very nice if Boost.MPL static constants could be marked as constexpr so that they can be used in other constant expressions. Feature Requests new To Be Determined mpl Boost 1.49.0 Problem constexpr