Function toLower

YUViewLib/src/common/Functions.cpp:164–169

}

std::string toLower(std::string str)
{
  std::transform(
      str.begin(), str.end(), str.begin(), [](unsigned char c) { return std::tolower(c); });
  return str;
}

std::optional<unsigned long> toUnsigned(const std::string &text)
{