Re: Problems with template template parameter

[Eljay Love-Jensen <eljay at adobe dot com>]

Hi Alexander,

How about a different approach:  take out the spurious and superfluous 
third parameter out of the Matrix_Base template?  A forward declaration 
will hold everything together.

--------------------------------------------------
#include <iostream>
    using std::cout;
    using std::endl;

template<int rows, int cols> class Matrix;

template<int rows, int cols>
class Matrix_Base {
public:
    Matrix_Base() {
        cout << __PRETTY_FUNCTION__ << endl;
        }

    template<int cols2>
    Matrix<rows, cols2>* operator * (Matrix<cols, cols2>& lhs) {
        return 0;
        }
};

template<int rows, int cols>
class Matrix : public Matrix_Base<rows, cols> {
public:
    Matrix() : Matrix_Base<rows, cols>() {
        cout << __PRETTY_FUNCTION__ << endl;
        }

    };

template<int rows>
class Matrix<rows, 1>
: public Matrix_Base<rows, 1>
{
public:
    Matrix() : Matrix_Base<rows, 1>() {
        cout << __PRETTY_FUNCTION__ << endl;
        }
    };

int main (int argc, char **argv) {
    Matrix<2, 2> A;
    Matrix<2, 1> B;

    A*A;
    }
--------------------------------------------------

--Eljay