Function NumToString

Libs/flatbuffers/util.h:125–137

// In contrast to std::stringstream, "char" values are
// converted to a string of digits, and we don't use scientific notation.
template<typename T> std::string NumToString(T t) {
  // clang-format off

  #ifndef FLATBUFFERS_PREFER_PRINTF
    std::stringstream ss;
    ss << t;
    return ss.str();
  #else // FLATBUFFERS_PREFER_PRINTF
    auto v = static_cast<long long>(t);
    return NumToStringImplWrapper(v, "%.*lld");
  #endif // FLATBUFFERS_PREFER_PRINTF
  // clang-format on
}
// Avoid char types used as character data.
template<> inline std::string NumToString<signed char>(signed char t) {
  return NumToString(static_cast<int>(t));