unusedPrivateFunction false positive with friends

[Haddayn]

Found a false positive when a template class is passed as a template parameter to its friend.

Checking cppcheck.cpp ...
cppcheck.cpp:14:7: style: Unused private function: 'operations::get' [unusedPrivateFunction]
void get() {}

template<typename Operator>
struct accessor
{
    void get()
    {
        Operator::get();
    }
}

template<typename T>
class operations {
    friend accessor<operations<T>>;

    void get() {}
};

[Daniel Marjamäki]

Thanks! I have created ticket https://trac.cppcheck.net/ticket/10507