Function intersect

Source/cmGeneratorTarget_CompatibleInterface.cxx:196–206

namespace {
std::string intersect(std::set<std::string> const& s1,
                      std::set<std::string> const& s2)
{
  std::set<std::string> intersect;
  std::set_intersection(s1.begin(), s1.end(), s2.begin(), s2.end(),
                        std::inserter(intersect, intersect.begin()));
  if (!intersect.empty()) {
    return *intersect.begin();
  }
  return "";
}

std::string intersect(std::set<std::string> const& s1,
                      std::set<std::string> const& s2,