Templated function with function pointers

[jstreich]

I have a global function, as follows:

template <class thing>
vector< pair<size_t,Loan> > 
Sort(Vector< pair<size_t,Loan> v, thing (Loan::* by)());

defined and protyped in a Repository class (a supped up container class)... And the interface is calling the function

vector< pair<size_t,Loan> > loans = repository.getLoans();
loans = Sort<string>(loans,&Loan.getLoanID);

Loan::getLoanID returns a string. Both classes compile into objects, but there is a linking error (symbol Referencing error)... Any thoughts on why it won't link would be appreciated.

 

[chipperMDW]

Try passing &Loan::getLoanID instead of &Loan.getLoanID.

I'm not sure why your compiler would have passed the dot notation... it must mean something weird I don't know about.

Since Loan is a class, not an object, you can't use the dot notation, and even if you had a Loan object called loan1, &loan1.getLoanID wouldn't make sense to the compiler since there's only the one member function, not one per object.