...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
boost::program_options::invalid_config_file_syntax
// In header: <boost/program_options/errors.hpp> class invalid_config_file_syntax : public boost::program_options::invalid_syntax { public: // public member functions invalid_config_file_syntax(const std::string &, kind_t); virtual std::string tokens() const; };