Hi,

  

  boost::icl::interval_map<int, boost::icl::interval_map<int, boost::icl::interval_set<int>>> larger, smaller;

  

  larger.add(make_pair(boost::icl::discrete_interval<int>::closed(102,104),

      boost::icl::interval_map<int, boost::icl::interval_set<int>>{

          make_pair(boost::icl::discrete_interval<int>::closed(0,0),

              boost::icl::interval_set<int>{boost::icl::discrete_interval<int>::closed(2,4)})}));

  smaller.add(make_pair(boost::icl::discrete_interval<int>::closed(103,103),

      boost::icl::interval_map<int, boost::icl::interval_set<int>>{

          make_pair(boost::icl::discrete_interval<int>::closed(0,0),

              boost::icl::interval_set<int>{boost::icl::discrete_interval<int>::closed(3,3)})}));

  

  cout << larger << endl;

  cout << smaller << endl;

  cout << boost::icl::contains(larger, smaller) << endl;

  cout << ((smaller & larger) == smaller) << endl;

As given above, I'm trying to check if smaller is subset of larger. But I get following output:

Any reason why boost::icl::contains(larger, smaller) doesn't work but ((smaller & larger) == smaller) works?

Thanks.