CHECK_CXX_SOURCE_COMPILES(
  "
  #include <vector>
  template<typename T>
  class ct2
  {
  public:
    typedef T type;
    void func();
  };

  template<typename T>
  void ct2<T>::func()
  {
    std::vector<T> vec;
    std::vector<T>::iterator itr = vec.begin();
  }

  int main(int argc, char **argv)
  {
    ct2<double> o2;
    o2.func();
    return 0;
  }
  " HAVE_IMPLICIT_DEPENDENT_NAME_TYPING)