Friend Factory
In this chapter, we are going to talk about making friends. We mean C++ friends here, not friends of C++ (you find those in your local C++ users group). In C++, friends of classes are functions or other classes that are granted special access to the class. In that way, they are not so different from your friends. But C++ can just manufacture friends as needed, on demand!
The following topics will be covered in this chapter:
- How do friend functions work in C++ and what do they do?
- When should you use friend functions versus class member functions?
- How to combine friends and templates
- How to generate friend functions from templates
