Borderou de evaluare (job #522349)

Eroare de compilare: user.cpp: In function 'int main()': user.cpp:28:1: error: reference to 'ref' is ambiguous user.cpp:8:10: error: candidates are: ura ref /usr/include/c++/4.6/functional:488:5: error: template<class _Tp> std::reference_wrapper<_Tp> std::ref(std::reference_wrapper<_Tp>) /usr/include/c++/4.6/functional:480:10: error: template<class _Tp> void std::ref(const _Tp&&) /usr/include/c++/4.6/functional:470:5: error: template<class _Tp> std::reference_wrapper<_Tp> std::ref(_Tp&) user.cpp:31:8: error: reference to 'ref' is ambiguous user.cpp:8:10: error: candidates are: ura ref /usr/include/c++/4.6/functional:488:5: error: template<class _Tp> std::reference_wrapper<_Tp> std::ref(std::reference_wrapper<_Tp>) /usr/include/c++/4.6/functional:480:10: error: template<class _Tp> void std::ref(const _Tp&&) /usr/include/c++/4.6/functional:470:5: error: template<class _Tp> std::reference_wrapper<_Tp> std::ref(_Tp&) user.cpp:33:9: error: reference to 'ref' is ambiguous user.cpp:8:10: error: candidates are: ura ref /usr/include/c++/4.6/functional:488:5: error: template<class _Tp> std::reference_wrapper<_Tp> std::ref(std::reference_wrapper<_Tp>) /usr/include/c++/4.6/functional:480:10: error: template<class _Tp> void std::ref(const _Tp&&) /usr/include/c++/4.6/functional:470:5: error: template<class _Tp> std::reference_wrapper<_Tp> std::ref(_Tp&)