...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
boost::system_error
// In header: <boost/test/execution_monitor.hpp> class system_error { public: // public member functions explicit system_error(char const *); // public data members long const p_errno; char const *const p_failed_exp; };