Question

By following this site C++ FAQ I have overloaded an operator() for my Matrix class. This is my class:

class Matrix
{
    public:
    inline float& operator() (unsigned row, unsigned col)
    {
        return m[row][col];
    }

    private:
    float m[4][4];
};

now I can use it in main function like this:

int main()
{
    Matrix matrix;
    std::cout << matrix(2,2);
}

but now I want to use it with the pointer like this:

int main()
{
    Matrix matrix;
    Matrix* pointer = &matrix;
    std::cout << pointer(2,2);
}

and compilator tells that pointer can not be used as a function. Is there any solution?

Answer 1

You’ll either need to dereference it:

(*pointer)(2,2)

Or you’ll need to call the operator by its full name:

pointer->operator()(2,2)