public:
virtual ~ACTION() {}
+ virtual ACTION * Clone() const = 0;
virtual std::string ParamDescription() const = 0;
virtual std::string DefaultDescription() const = 0;
virtual OPTION_BLOCK & Suboptions() = 0;
virtual PARSER_STATE Parse(int argc, char ** argv) = 0;
+ virtual void ParseValue(const std::string &) {}
class ERROR : public std::runtime_error
{