Eroare de compilare: In file included from /usr/local/include/c++/4.8.0/bits/hashtable.h:35:0, from /usr/local/include/c++/4.8.0/unordered_set:47, from user.cpp:3: /usr/local/include/c++/4.8.0/bits/hashtable_policy.h: In instantiation of ‘struct std::__detail::__is_noexcept_hash<int, int>’: /usr/local/include/c++/4.8.0/type_traits:121:12: recursively required from ‘struct std::__and_<std::is_default_constructible<int>, std::is_copy_assignable<int>, std::__detail::__is_noexcept_hash<int, int> >’ /usr/local/include/c++/4.8.0/type_traits:121:12: required from ‘struct std::__and_<std::__is_fast_hash<int>, std::is_default_constructible<int>, std::is_copy_assignable<int>, std::__detail::__is_noexcept_hash<int, int> >’ /usr/local/include/c++/4.8.0/type_traits:127:38: required from ‘struct std::__not_<std::__and_<std::__is_fast_hash<int>, std::is_default_constructible<int>, std::is_copy_assignable<int>, std::__detail::__is_noexcept_hash<int, int> > >’ /usr/local/include/c++/4.8.0/bits/unordered_set.h:95:63: required from ‘class std::unordered_set<int, int>’ user.cpp:8:26: required from here /usr/local/include/c++/4.8.0/bits/hashtable_policy.h:85:33: error: expression cannot be used as a function noexcept(declval<const _Hash&>()(declval<const _Key&>()))> ^ In file included from /usr/local/include/c++/4.8.0/bits/move.h:57:0, from /usr/local/include/c++/4.8.0/bits/stl_pair.h:59, from /usr/local/include/c++/4.8.0/utility:70, from /usr/local/include/c++/4.8.0/unordered_set:38, from user.cpp:3: /usr/local/include/c++/4.8.0/type_traits: In instantiation of ‘struct std::__not_<std::__and_<std::__is_fast_hash<int>, std::is_default_constructible<int>, std::is_copy_assignable<int>, std::__detail::__is_noexcept_hash<int, int> > >’: /usr/local/include/c++/4.8.0/bits/unordered_set.h:95:63: required from ‘class std::unordered_set<int, int>’ user.cpp:8:26: required from here /usr/local/include/c++/4.8.0/type_traits:127:38: error: ‘value’ is not a member of ‘std::__and_<std::__is_fast_hash<int>, std::is_default_constructible<int>, std::is_copy_assignable<int>, std::__detail::__is_noexcept_hash<int, int> >’ : public integral_constant<bool, !_Pp::value> ^ In file included from /usr/local/include/c++/4.8.0/unordered_set:48:0, from user.cpp:3: /usr/local/include/c++/4.8.0/bits/unordered_set.h: In instantiation of ‘class std::unordered_set<int, int>’: user.cpp:8:26: required from here /usr/local/include/c++/4.8.0/bits/unordered_set.h:95:63: error: ‘value’ is not a member of ‘std::__not_<std::__and_<std::__is_fast_hash<int>, std::is_default_constructible<int>, std::is_copy_assignable<int>, std::__detail::__is_noexcept_hash<int, int> > >’ typedef __uset_hashtable<_Value, _Hash, _Pred, _Alloc> _Hashtable; ^ /usr/local/include/c++/4.8.0/bits/unordered_set.h:102:45: error: ‘value’ is not a member of ‘std::__not_<std::__and_<std::__is_fast_hash<int>, std::is_default_constructible<int>, std::is_copy_assignable<int>, std::__detail::__is_noexcept_hash<int, int> > >’ typedef typename _Hashtable::key_type key_type; ^ /usr/local/include/c++/4.8.0/bits/unordered_set.h:103:47: error: ‘value’ is not a member of ‘std::__not_<std::__and_<std::__is_fast_hash<int>, std::is_default_constructible<int>, std::is_copy_assignable<int>, std::__detail::__is_noexcept_hash<int, int> > >’ typedef typename _Hashtable::value_type value_type; ^ /usr/local/include/c++/4.8.0/bits/unordered_set.h:104:43: error: ‘value’ is not a member of ‘std::__not_<std::__and_<std::__is_fast_hash<int>, std::is_default_constructible<int>, std::is_copy_assignable<int>, std::__detail::__is_noexcept_hash<int, int> > >’ typedef typename _Hashtable::hasher hasher; ^ /usr/local/include/c++/4.8.0/bits/unordered_set.h:105:46: error: ‘value’ is not a member of ‘std::__not_<std::__and_<std::__is_fast_hash<int>, std::is_default_constructible<int>, std::is_copy_assignable<int>, std::__detail::__is_noexcept_hash<int, int> > >’ typedef typename _Hashtable::key_equal key_equal; ^ /usr/local/include/c++/4.8.0/bits/unordered_set.h:106:51: error: ‘value’ is not a member of ‘std::__not_<std::__and_<std::__is_fast_hash<int>, std::is_default_constructible<int>, std::is_copy_assignable<int>, std::__detail::__is_noexcept_hash<int, int> > >’ typedef typename _Hashtable::allocator_type allocator_type; ^ /usr/local/include/c++/4.8.0/bits/unordered_set.h:115:46: error: ‘value’ is not a member of ‘std::__not_<std::__and_<std::__is_fast_hash<int>, std::is_default_constructible<int>, std::is_copy_assignable<int>, std::__detail::__is_noexcept_hash<int, int> > >’ typedef typename _Hashtable::iterator iterator; ^ /usr/local/include/c++/4.8.0/bits/unordered_set.h:116:51: error: ‘value’ is not a member of ‘std::__not_<std::__and_<std::__is_fast_hash<int>, std::is_default_constructible<int>, std::is_copy_assignable<int>, std::__detail::__is_noexcept_hash<int, int> > >’ typedef typename _Hashtable::const_iterator const_iterator;