Function Safe

cpp/src/arrow/compute/cast.h:49–53

  static constexpr const char kTypeName[] = "CastOptions";
  static CastOptions Safe(TypeHolder to_type = {}) {
    CastOptions safe(true);
    safe.to_type = std::move(to_type);
    return safe;
  }

  static CastOptions Unsafe(TypeHolder to_type = {}) {
    CastOptions unsafe(false);