...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::ambiguous_option
// In header: <boost/program_options/errors.hpp> class ambiguous_option : public boost::program_options::error_with_no_option_name { public: // construct/copy/destruct ambiguous_option(const std::vector< std::string > &); ~ambiguous_option(); // public member functions const std::vector< std::string > & alternatives() const; // protected member functions void substitute_placeholders(const std::string &) const; };