Function require_numeric_argument

ext/src/cppformat/format.cc:219–225

}

inline void require_numeric_argument(const Arg &arg, char spec) {
  if (arg.type > Arg::LAST_NUMERIC_TYPE) {
    std::string message =
        fmt::format("format specifier '{}' requires numeric argument", spec);
    FMT_THROW(fmt::FormatError(message));
  }
}

template <typename Char>
void check_sign(const Char *&s, const Arg &arg) {