boost/concept_check.hpp: In method 'void LessThanComparableConcept <_List_iterator<...> >::constraints()': boost/concept_check.hpp:334: instantiated from 'RandomAccessIteratorConcept <_List_iterator<...> >::constraints()' bad_error_eg.cpp:6: instantiated from 'stable_sort<_List_iterator <...> >(_List_iterator<...>, _List_iterator<...>)' boost/concept_check.hpp:209: no match for '_List_iterator<...> & < _List_iterator<...> &'
Example 4: An informative, BCCL-like message.