In file included from test_adl.cc:1:
/usr/lib/gcc/x86_64-redhat-linux/4.7.2/../../../../include/c++/4.7.2/tuple:362:25: error: call to 'swap' is ambiguous
      noexcept(noexcept(swap(std::declval<_Head&>(),
                        ^~~~
/usr/lib/gcc/x86_64-redhat-linux/4.7.2/../../../../include/c++/4.7.2/tuple:492:25: note: in instantiation of exception specification for '_M_swap' requested here
      noexcept(noexcept(__in._M_swap(__in)))
                        ^
test_adl.cc:12:5: note: in instantiation of exception specification for 'swap' requested here
  x.swap(y);
    ^
/usr/lib/gcc/x86_64-redhat-linux/4.7.2/../../../../include/c++/4.7.2/bits/move.h:167:5: note: candidate function [with _Tp = boost::icl::interval_set<int, std::less, boost::icl::discrete_interval<int, less>, std::allocator>]
    swap(_Tp& __a, _Tp& __b)
    ^
/usr/include/boost/icl/concept/container.hpp:62:1: note: candidate function [with Type = boost::icl::interval_set<int, std::less, boost::icl::discrete_interval<int, less>, std::allocator>]
swap(Type& left, Type& right)
^
In file included from test_adl.cc:1:
/usr/lib/gcc/x86_64-redhat-linux/4.7.2/../../../../include/c++/4.7.2/tuple:367:2: error: call to 'swap' is ambiguous
        swap(_M_head(*this), _M_head(__in));
        ^~~~
/usr/lib/gcc/x86_64-redhat-linux/4.7.2/../../../../include/c++/4.7.2/tuple:493:21: note: in instantiation of member function 'std::_Tuple_impl<0, boost::icl::interval_set<int, std::less, boost::icl::discrete_interval<int, less>, std::allocator> >::_M_swap' requested here
      { _Inherited::_M_swap(__in); }
                    ^
test_adl.cc:12:5: note: in instantiation of member function 'std::tuple<boost::icl::interval_set<int, std::less, boost::icl::discrete_interval<int, less>, std::allocator> >::swap' requested here
  x.swap(y);
    ^
/usr/lib/gcc/x86_64-redhat-linux/4.7.2/../../../../include/c++/4.7.2/bits/move.h:167:5: note: candidate function [with _Tp = boost::icl::interval_set<int, std::less, boost::icl::discrete_interval<int, less>, std::allocator>]
    swap(_Tp& __a, _Tp& __b)
    ^
/usr/include/boost/icl/concept/container.hpp:62:1: note: candidate function [with Type = boost::icl::interval_set<int, std::less, boost::icl::discrete_interval<int, less>, std::allocator>]
swap(Type& left, Type& right)
^
2 errors generated.