Hi, I was wondering if it will be useful to define BOOST_CONSTEXPR as follows #if defined(BOOST_NO_CONSTEXPR) #define BOOST_CONSTEXPR #else #define BOOST_CONSTEXPR constexpr #endif and if it is correct to use it as for example static BOOST_CONSTEXPR Rep zero(); If this is the case, could this be added to Boost.Config? If not, what I'm missing? Best, Vicente -- View this message in context: http://old.nabble.com/-config--BOOST_CONSTEXPR-and-C%2B%2B0x-constexpr-tp265... Sent from the Boost - Dev mailing list archive at Nabble.com.