Paul A Bristow wrote:
As far as I recollect, VS 7.1 also worked correctly for all FP types, so I would surmise that the number of digits used for serialisation is insufficient? For double, it should be 17. There do appear to be 17 digits, so I am slightly puzzled.
But:
I:\boost-06-01-13-0500\boost\archive\basic_text_oprimitive.hpp(124)
uses
os << std::setprecision(std::numeric_limits<double>::digits10 + 2);
and I suggest that this should be:
os << std::setprecision(2 + std::numeric_limits<double>::digits * 3030/10000);
Yes, fair enough, but that wouldn't make any difference in this case. The problem is clearly with the *de*serialisation. Tracing back through the functions, this seems to be the function (in basic_text_iprimitive.hpp) that reads doubles from XML files: void load(T & t) { if(is.fail()) boost::throw_exception(archive_exception(archive_exception::stream_error)); is >> t; } This suggests that it is a broken feature of Microsoft's operator>> for doubles read from filestreams. Paul