Function GenerateRandomAlphabeticString

Common/Misc/vtkExprTkFunctionParser.cxx:304–314

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//------------------------------------------------------------------------------
std::string GenerateRandomAlphabeticString(unsigned int len)
{
  static constexpr auto chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
                                "abcdefghijklmnopqrstuvwxyz";
  auto rng = std::default_random_engine(std::random_device{}());
  auto dist = std::uniform_int_distribution<int>(0, static_cast<int>(std::strlen(chars) - 1));
  auto result = std::string(len, '\0');
  std::generate_n(begin(result), len, [&]() { return chars[dist(rng)]; });

  return result;
}

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std::string GenerateUniqueVariableName(