Function to_string

src/audio/base/Utils.h:96–116

template <typename T>
auto to_string(const T& num, const std::string def = "0") -> std::string {
  // This is used to replace `std::to_string` as a locale independent
  // number conversion using `std::to_chars`.
  // An additional string parameter could be eventually provided with a
  // default value to return in case the conversion fails.

  // Max buffer length:
  // number of base-10 digits that can be represented by the type T without change +
  // number of base-10 digits that are necessary to uniquely represent all distinct
  // values of the type T (meaningful only for real numbers) +
  // room for other characters such as "+-e,."
  const size_t max = std::numeric_limits<T>::digits10 + std::numeric_limits<T>::max_digits10 + 10U;

  std::array<char, max> buffer;

  const auto p_init = buffer.data();

  const auto result = std::to_chars(p_init, p_init + max, num);

  return (result.ec == std::errc()) ? std::string(p_init, result.ptr - p_init) : def;
}


}  // namespace util