Class malformed_input

src/common/error_code.h:266–272

};

struct malformed_input : public error {
  malformed_input() : error(errc::malformed_input) {}
  malformed_input(const char* what_arg)
    : error(errc::malformed_input, what_arg) {}
  malformed_input(const std::string& what_arg)
    : error(errc::malformed_input, what_arg) {}
};
struct error_code : public error {
  error_code(int r) : error(-r, boost::system::generic_category()) {}
  error_code(int r, const char* what_arg)