Method parse

cmdParser.h:76–87

            }

            virtual bool parse( std::ostream& output, std::ostream& error ) {
                try
                {
                    CallbackArgs args{ arguments, output, error };
                    value = callback( args );
                    return true;
                }
                catch ( ... )
                {
                    return false;
                }
            }

            virtual std::string print_value() const {
                return "";