Actually looking at this further... boost_1_33_1/libs/numeric/conversion/test/bounds_test.cpp: cout << setprecision( std::numeric_limits<long double>::digits10 ) ; boost_1_33_1/libs/numeric/conversion/test/traits_test.cpp: std::cout << std::setprecision( std::numeric_limits<long double>::digits10 ) ; boost_1_33_1/libs/numeric/conversion/test/converter_test.cpp: std::cout << std::setprecision( std::numeric_limits<long double>::digits10 ) ; boost_1_33_1/libs/numeric/interval/examples/io.cpp: boost::io::ios_precision_saver state(stream, std::numeric_limits<T>::digits10); boost_1_33_1/libs/numeric/interval/examples/io.cpp: boost::io::ios_precision_saver state(stream, std::numeric_limits<T>::digits10); May also want to be looked at in terms of 'recomending to the users by example' the correct thing todo. (this was based upon a quick grep of the code BTW) Kevin -- | Kevin Wheatley, Cinesite (Europe) Ltd | Nobody thinks this | | Senior Technology | My employer for certain | | And Network Systems Architect | Not even myself |