/* matrix.cpp */
#include <iostream.h>

template <class T, int n, int m>
class Matrix {
   T v[n][m];
public:
   Matrix() { cout << "Matrix<T,n,m>" << endl; };
   template <class TT, int nn, int mm>
   friend Matrix<TT,nn,mm> operator+(const Matrix<TT,nn,mm> &, const
Matrix<TT,nn,mm> &);
};

template <class T, int n, int m>
Matrix<T,n,m> operator+(const Matrix<T,n,m> &x, const Matrix<T,n,m> &y)
{
   cout << "operator+<T,n,m>" << endl;
   Matrix<T,n,m> r;
   for (int i = 0; i < n; ++i)
      for (int j = 0; j < m; ++j)
         r.v[i][j] = x.v[i][j] + y.v[i][j];
   return r;
}

template <class T>
class Matrix<T, 3, 3> {
   T v[3][3];
public:
   Matrix() { cout << "Matrix<T,3,3>" << endl; };
   template <class TT>
   friend Matrix<TT,3,3> operator+(const Matrix<TT,3,3> &, const
Matrix<TT,3,3> &);
};

template <class T>
Matrix<T,3,3> operator+(const Matrix<T,3,3> &x, const Matrix<T,3,3> &y)
{
   cout << "operator+<T,3,3>" << endl;
   Matrix<T,3,3> r;
   r.v[0][0] = x.v[0][0] + y.v[0][0];
   r.v[0][1] = x.v[0][1] + y.v[0][1];
   r.v[0][2] = x.v[0][2] + y.v[0][2];
   r.v[1][0] = x.v[1][0] + y.v[1][0];
   r.v[1][1] = x.v[1][1] + y.v[1][1];
   r.v[1][2] = x.v[1][2] + y.v[1][2];
   r.v[2][0] = x.v[2][0] + y.v[2][0];
   r.v[2][1] = x.v[2][1] + y.v[2][1];
   r.v[2][2] = x.v[2][2] + y.v[2][2];
   return r;
}

int main(void)
{
   Matrix<int,3,3> m;
   m + m;

   return 0;
}


While compiled with dmc 8.29 (STLport STL not installed):

   m + m;
        ^
matrix2.cpp(57) : Error: ambiguous reference to symbol
Had: operator +(const Matrix<>&,const Matrix<>&)
and: operator +(const Matrix<>&,const Matrix<>&)
Internal error: exp2 121
--- errorlevel 1

I'll have a look at it. Thanks. -Walter

This is fixed now in the beta www.digitalmars.com/download/freecompiler.html

But, it will still be necessary to make sure the parameter spelling in the template-parameter-list in the friend declaration matches the corresponding definition.

-Walter

"Iliya Peregoudov" <iliyap@mail.ru> wrote in message news:3D899630.3523@mail.ru...
> /* matrix.cpp */
> #include <iostream.h>
>
> template <class T, int n, int m>
> class Matrix {
>    T v[n][m];
> public:
>    Matrix() { cout << "Matrix<T,n,m>" << endl; };
>    template <class TT, int nn, int mm>
>    friend Matrix<TT,nn,mm> operator+(const Matrix<TT,nn,mm> &, const
> Matrix<TT,nn,mm> &);
> };
>
> template <class T, int n, int m>
> Matrix<T,n,m> operator+(const Matrix<T,n,m> &x, const Matrix<T,n,m> &y)
> {
>    cout << "operator+<T,n,m>" << endl;
>    Matrix<T,n,m> r;
>    for (int i = 0; i < n; ++i)
>       for (int j = 0; j < m; ++j)
>          r.v[i][j] = x.v[i][j] + y.v[i][j];
>    return r;
> }
>
> template <class T>
> class Matrix<T, 3, 3> {
>    T v[3][3];
> public:
>    Matrix() { cout << "Matrix<T,3,3>" << endl; };
>    template <class TT>
>    friend Matrix<TT,3,3> operator+(const Matrix<TT,3,3> &, const
> Matrix<TT,3,3> &);
> };
>
> template <class T>
> Matrix<T,3,3> operator+(const Matrix<T,3,3> &x, const Matrix<T,3,3> &y)
> {
>    cout << "operator+<T,3,3>" << endl;
>    Matrix<T,3,3> r;
>    r.v[0][0] = x.v[0][0] + y.v[0][0];
>    r.v[0][1] = x.v[0][1] + y.v[0][1];
>    r.v[0][2] = x.v[0][2] + y.v[0][2];
>    r.v[1][0] = x.v[1][0] + y.v[1][0];
>    r.v[1][1] = x.v[1][1] + y.v[1][1];
>    r.v[1][2] = x.v[1][2] + y.v[1][2];
>    r.v[2][0] = x.v[2][0] + y.v[2][0];
>    r.v[2][1] = x.v[2][1] + y.v[2][1];
>    r.v[2][2] = x.v[2][2] + y.v[2][2];
>    return r;
> }
>
> int main(void)
> {
>    Matrix<int,3,3> m;
>    m + m;
>
>    return 0;
> }
>
>
> While compiled with dmc 8.29 (STLport STL not installed):
>
>    m + m;
>         ^
> matrix2.cpp(57) : Error: ambiguous reference to symbol
> Had: operator +(const Matrix<>&,const Matrix<>&)
> and: operator +(const Matrix<>&,const Matrix<>&)
> Internal error: exp2 121
> --- errorlevel 1

Walter wrote:
> This is fixed now in the beta www.digitalmars.com/download/freecompiler.html
> 
> But, it will still be necessary to make sure the parameter spelling in the
> template-parameter-list in the friend declaration matches the corresponding
> definition.

This beta (scppn.exe, 09/20/2002) compiles previous code but crashes
with the following code that doesn't use specializations at all!

/* matrix.cpp */
#include <iostream.h>

template <class T, int n, int m>
class Matrix {
   T v[n][m];
public:
   Matrix() { cout << "Matrix<T,n,m>" << endl; };
   template <class TT, int nn, int mm>
   friend Matrix<TT,nn,mm> operator+(const Matrix<TT,nn,mm> &, const Matrix<TT,nn,mm> &);
};

template <class TT, int nn, int mm>
Matrix<TT,nn,mm> operator+(const Matrix<TT,nn,mm> &x, const Matrix<TT,nn,mm> &y)
{
   cout << "operator+<T,n,m>" << endl;
   Matrix<TT,nn,mm> r;
   for (int i = 0; i < nn; ++i)
      for (int j = 0; j < mm; ++j)
         r.v[i][j] = x.v[i][j] + y.v[i][j];
   return r;
}

int main(void)
{
   Matrix<int,3,3> m;
   m + m;

   return 0;
}


dmc -A matrix3.cpp
   m + m;
        ^
matrix3.cpp(27) : Error: template-argument 'mm' has no value in template function specialization
matrix3.cpp(14) : Error: '(' expected following simple type name
--- errorlevel 1

And compiler pops up the Windows fatal error panel:

SCPPN caused an invalid page fault in
module SCPPN.EXE at 015f:0042b022.
Registers:
EAX=008a15c4 CS=015f EIP=0042b022 EFLGS=00010203
EBX=008a15c4 SS=0167 ESP=006fefc8 EBP=00000000
ECX=00000000 DS=0167 ESI=006ff3a4 FS=35b7
EDX=008a0104 ES=0167 EDI=00000000 GS=34f6
Bytes at CS:EIP:
81 49 28 60 08 00 00 83 bc 24 dc 03 00 00 00 74
Stack dump:
00000000 008a0248 0089ddfe 00000007 008a00d4 0071db88 00000000
008a0104 0089de32 00890078 00000019 00414010 00000019 0089acfc
00000000 00000001

Iliya Peregoudov wrote:
> This beta (scppn.exe, 09/20/2002) compiles previous code but crashes
> with the following code that doesn't use specializations at all!

And the original 8.29 (scppn.exe, 07/31/2002) also crashes on the same
file:

SCPPN caused an invalid page fault in
module SCPPN.EXE at 015f:0042aca2.
Registers:
EAX=008a0de4 CS=015f EIP=0042aca2 EFLGS=00010203
EBX=008a0de4 SS=0167 ESP=006fefd0 EBP=00000000
ECX=00000000 DS=0167 ESI=006ff3ac FS=21ff
EDX=0089ebfa ES=0167 EDI=00000000 GS=2226
Bytes at CS:EIP:
81 49 28 60 08 00 00 83 bc 24 dc 03 00 00 00 74
Stack dump:
00000000 0089ed1e 0089d7fe 0089ef42 0089ebd2 026662b0 00000000
0089ebfa 0089d882 00000078 0089a72c 0089d882 00000019 00413f1c
00000019 0089a72c

Ok, I'll check it out.

Ok, I posted the fix for this. -Walter

"Iliya Peregoudov" <iliyap@mail.ru> wrote in message news:3D8C47BA.1010805@mail.ru...
> Walter wrote:
> > This is fixed now in the beta
www.digitalmars.com/download/freecompiler.html
> >
> > But, it will still be necessary to make sure the parameter spelling in
the
> > template-parameter-list in the friend declaration matches the
corresponding
> > definition.
>
> This beta (scppn.exe, 09/20/2002) compiles previous code but crashes with the following code that doesn't use specializations at all!
>
> /* matrix.cpp */
> #include <iostream.h>
>
> template <class T, int n, int m>
> class Matrix {
>     T v[n][m];
> public:
>     Matrix() { cout << "Matrix<T,n,m>" << endl; };
>     template <class TT, int nn, int mm>
>     friend Matrix<TT,nn,mm> operator+(const Matrix<TT,nn,mm> &, const
> Matrix<TT,nn,mm> &);
> };
>
> template <class TT, int nn, int mm>
> Matrix<TT,nn,mm> operator+(const Matrix<TT,nn,mm> &x, const
> Matrix<TT,nn,mm> &y)
> {
>     cout << "operator+<T,n,m>" << endl;
>     Matrix<TT,nn,mm> r;
>     for (int i = 0; i < nn; ++i)
>        for (int j = 0; j < mm; ++j)
>           r.v[i][j] = x.v[i][j] + y.v[i][j];
>     return r;
> }
>
> int main(void)
> {
>     Matrix<int,3,3> m;
>     m + m;
>
>     return 0;
> }
>
>
> dmc -A matrix3.cpp
>     m + m;
>          ^
> matrix3.cpp(27) : Error: template-argument 'mm' has no value in template
> function specialization
> matrix3.cpp(14) : Error: '(' expected following simple type name
> --- errorlevel 1
>
> And compiler pops up the Windows fatal error panel:
>
> SCPPN caused an invalid page fault in
> module SCPPN.EXE at 015f:0042b022.
> Registers:
> EAX=008a15c4 CS=015f EIP=0042b022 EFLGS=00010203
> EBX=008a15c4 SS=0167 ESP=006fefc8 EBP=00000000
> ECX=00000000 DS=0167 ESI=006ff3a4 FS=35b7
> EDX=008a0104 ES=0167 EDI=00000000 GS=34f6
> Bytes at CS:EIP:
> 81 49 28 60 08 00 00 83 bc 24 dc 03 00 00 00 74
> Stack dump:
> 00000000 008a0248 0089ddfe 00000007 008a00d4 0071db88 00000000
> 008a0104 0089de32 00890078 00000019 00414010 00000019 0089acfc
> 00000000 00000001
>

Walter wrote:
> Ok, I posted the fix for this. -Walter

Works fine, thanks.  Great!