template的用法疑问
template<bool> struct _Destroy_aux { template<typename _ForwardIterator> static void __destroy(_ForwardIterator __first, _ForwardIterator __last) { for (; __first != __last; ++__first) std::_Destroy(std::__addressof(*__first)); } };template<> struct _Destroy_aux<true>//这里也可能是false { ... };