id,summary,reporter,owner,description,type,status,milestone,component,version,severity,resolution,keywords,cc
12170,boost::multiprecision::export_bits throws on a negative cpp_int number,Tassilo Glander <tassilo.glander@…>,John Maddock,"When calling export_bits on a negative boost::multiprecision number based on cpp_int, an exception is thrown from the internal method msb (""testing individual bits in negative values is not supported"").

boost::multiprecision::checked_int128_t i (-1); // use negative number
std::vector<unsigned char> v;
export_bits(i, std::back_inserter(v), 8);  // throws

export_bits is designed to be used for data exchange, so must export valid data.",Bugs,closed,To Be Determined,multiprecision,Boost 1.60.0,Problem,fixed,export_bits cpp_int,