Hmmm - that surprises me. I look at the code in the file basic_text_oprimitive.hpp and I find:
void save(const float t) { // must be a user mistake - can't serialize un-initialized data if(os.fail()) boost::serialization::throw_exception( archive_exception(archive_exception::output_stream_error) ); os << std::setprecision(std::numeric_limits<float>::digits10 + 2); os << t; }
Is this code not correct? Note that I added in 2 extra digits. Or is this code not getting invoked? Let me know.
Ah, I think there are still 2 bugs: * There's no special handling for long double - so it gets the default 5 digits. * You don't output in scientific format: what that means in practice is that if you write a number with a small exponent and it gets printed in fixed format, then you get std::numeric_limits<float>::digits10 + 2 digits *after the decimal point*. That may be too many digits if the exponent is > 0, but if the exponent is < 0 then you get fewer *significant* digits printed than you might expect, as the number will be 0.001234.... etc And of course there's still no way to set the number of digits on UDT's declared as primitives. John. PS would it be OK to apply the patch from https://svn.boost.org/trac/boost/ticket/8963 ?