#ifndef VECTOR #define VECTOR template <bool, typename> struct B; template <typename _Tp> struct B<true, _Tp> { typedef _Tp type; }; namespace std { template <typename> struct D { template <typename _Alloc2> struct F { static const bool value = 0; }; template <typename _Alloc2> typename B<F<_Alloc2>::value, _Alloc2>::type _S_select(_Alloc2); template <typename _Alloc2> static typename B<!F<_Alloc2>::value, _Alloc2>::type _S_select(_Alloc2); }; template <typename _Alloc> template <typename _Alloc2> const bool D<_Alloc>::F<_Alloc2>::value; template <typename> class vector { public: vector(int); vector(vector &) : vector(D<bool>::_S_select((bool)0)) {} }; } #endif // VECTOR