Function pointer to a member function of the template class

The c ++ standard does not support template function pointers, such:

[Cpp]
Template <typename Type>
Typedef int (* Func) (constType & type); // a compilation error is prompted.
However, we can write as follows:

[Cpp]
Template <typename COL_TYPE, typename RESULT_TYPE>
Class CAggCalculator {
Private:
Typedef bool (CAggCalculator: * AggFuncT) (CColumnSeg <COL_TYPE> & columnSeg, RESULT_TYPE & result );
 
Typename CAggCalculator <COL_TYPE, RESULT_TYPE >:: AggFuncT m_pAggFuncT;
.....
};

In this way, we get a member function pointing to bool xxx (CColumnSeg & columnSeg, RESULT_TYPE & result );.