Re: [Boost-users] Question regarding template

17 Oct 2006


      template <class T>
class CMatrix{
    matrix<T>mat_;
 public:
    CMatrix(const identity_matrix<T>& m) { mat_ = m; }
    static CMatrix<T> eye(int size)   { return identity_matrix<T>(size); }
};

template<class T>
void operator << (ostream& os, CMatrix<T>& m)//////////// line A
{}

int main(){
    CMatrix<double> I = CMatrix<double>::eye(5);
    cout< 
??????:eh0dec$ih5$1@sea.gmane.org...
...
"YYW"  wrote
...
why the codes below is wrong in g++ 3.4.2?
an error occurs in the line: cout<
#include 
using namespace boost::numeric::ublas;
using namespace std;
template <class T>
class CMatrix
{
   matrix<T>mat_;
public:
   CMatrix(const identity_matrix<T>& m) { mat_ = m; }
   static CMatrix<T> eye(int size) { return identity_matrix<T>(size); }
template <class T_>
       friend ostream& operator << (ostream& os, CMatrix& m);
};
template<class T_>
ostream& operator << (ostream& os, CMatrix& m)
Try this:
ostream& operator << (ostream& os, const CMatrix& m)
Regards,
Arkadiy