static variables in template class

[Shahin Tavakoli]

Hi,

I'd like to put a static member in a template class, but I don't know
the syntax. I've tried out

template<typename Type> class Stocker : private vector<Type>
{
public:

static int NB;
};

int Stocker<double>::NB(5);


int main()
{

cout << Stocker::NB << endl;


return 0;

}

but it doesn't work, it gives me

error: too few template-parameter-lists

could someone please help me out?

thanks a lot!

Shahin

 

[Victor Bazarov]

I'd like to put a static member in a template class, but I don't know
the syntax. I've tried out

template<typename Type> class Stocker : private vector<Type>
{
public:

static int NB;
};

int Stocker<double>::NB(5);

int main()
{

cout << Stocker::NB << endl;

Here 'Stocker' is a template-id. You cannot use it here without its
template arguments:

return 0;

}

but it doesn't work, it gives me

error: too few template-parameter-lists

could someone please help me out?

See above.

V

 

[amparikh]

Hi,

I'd like to put a static member in a template class, but I don't know
the syntax. I've tried out

template<typename Type> class Stocker : private vector<Type>
{
public:

static int NB;
};

int Stocker<double>::NB(5);


int main()
{

cout << Stocker::NB << endl;


return 0;

}

but it doesn't work, it gives me

error: too few template-parameter-lists

could someone please help me out?

thanks a lot!

Shahin

1>You need to define the static member of the template class

2>If you need a "special" definition for double, then specialize the
member variable.

template<typename Type> class Stocker : private vector<Type>
{
public:
static int NB;
};

template <typename T>
int Stocker<T>::NB;

template<>
int Stocker<double>::NB(5);

int main()
{
cout << Stocker<int>::NB << endl;
cout << Stocker<double>::NB << endl;
return 0;
}

 

[Shahin Tavakoli]

thanks a lot!

Shahin