‘make_ unique’ is not a member of ‘std’

../UniqueStrTest/main.cpp: In function ‘int main(int, char**)’:
../UniqueStrTest/main.cpp:35:25: error: ‘make_unique’ is not a member of ‘std’
           auto p = std::make_unique<D>(); // p  Is possession  D  Of  unique_ptr
                         ^~~~~~~~~~~

make_unique from c++14 Start ,c++11 I won't support it , But you can do it yourself make_unique

  /// std::make_unique for single objects
  template<typename _Tp, typename... _Args>
    inline typename _MakeUniq<_Tp>::__single_object
    make_unique(_Args&&... __args)
    { return unique_ptr<_Tp>(new _Tp(std::forward<_Args>(__args)...)); }

  /// std::make_unique for arrays of unknown bound
  template<typename _Tp>
    inline typename _MakeUniq<_Tp>::__array
    make_unique(size_t __num)
    { return unique_ptr<_Tp>(new remove_extent_t<_Tp>[__num]()); }

  /// Disable std::make_unique for arrays of known bound
  template<typename _Tp, typename... _Args>
    inline typename _MakeUniq<_Tp>::__invalid_type
    make_unique(_Args&&...) = delete;