...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_command_line_syntax
// In header: <boost/program_options/errors.hpp> class invalid_command_line_syntax : public boost::program_options::invalid_syntax { public: // construct/copy/destruct invalid_command_line_syntax(kind_t, const std::string & = "", const std::string & = "", int = 0); ~invalid_command_line_syntax(); };