Boost
C++ Libraries
...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
This is an older version of Boost and was released in 2013. The current version is 1.90.0.
#include <string>
namespace
boost
{
class exception;
std::string diagnostic_information( boost::exception const & );
}