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Hi all,

Imagine I have: template <class T> class Matrix;
I can have a Matrix of doubles, of cars, trains, any object at all...
But know... I want to implement a method foo that should only work with
Matrix<double>. How can I specify this?

Cheers,

Paulo Matos

template<class T>

class blah

{

public:

blah();

void foo(double x);

void moo(T x);

private:

T items;

};

template<class T>

blah<T>::blah()

{

}

void blah<double>::foo(double x)

{

cout << x << endl;

}

template<class T>

void blah<T>::moo(T x)

{

cout << x << endl;

}



The following will work

void main()

{

blah<double> y;

y.foo(23);

}

But this will give error



void main()

{

blah<char> y;

y.foo(23);

}




"pmatos" <> wrote in message
news: oups.com...
> Hi all,
>
> Imagine I have: template <class T> class Matrix;
> I can have a Matrix of doubles, of cars, trains, any object at all...
> But know... I want to implement a method foo that should only work with
> Matrix<double>. How can I specify this?
>
> Cheers,
>
> Paulo Matos
>

"Someonekicked" <> wrote in message
news:k72dnVqjWfdGrb3eRVn-
> template<class T>
>
> class blah
>
> {
>
> public:
>
> blah();
>
> void foo(double x);
>
> void moo(T x);
>
> private:
>
> T items;
>
> };
>
> template<class T>
>
> blah<T>::blah()
>
> {
>
> }
>
> void blah<double>::foo(double x)
> {
> cout << x << endl;
> }

The above function definition should be

template<>
void blah<double>::foo(double x)
{
cout << x << endl;
}

i.e., you should precede it with template<>


>
> template<class T>
>
> void blah<T>::moo(T x)
>
> {
>
> cout << x << endl;
>
> }
>
>
>
> The following will work
>
> void main()
>
> {
>
> blah<double> y;
>
> y.foo(23);
>
> }

main should return int --- and some compilers will insist on it.



--
John Carson

Thanks all for the help... Workin'...

John Carson wrote:
> "Someonekicked" <> wrote in message
> news:k72dnVqjWfdGrb3eRVn-
> > template<class T>
> >
> > class blah
> >
> > {
> >
> > public:
> >
> > blah();
> >
> > void foo(double x);
> >
> > void moo(T x);
> >
> > private:
> >
> > T items;
> >
> > };
> >
> > template<class T>
> >
> > blah<T>::blah()
> >
> > {
> >
> > }
> >
> > void blah<double>::foo(double x)
> > {
> > cout << x << endl;
> > }
>
> The above function definition should be
>
> template<>
> void blah<double>::foo(double x)
> {
> cout << x << endl;
> }
>
> i.e., you should precede it with template<>
>
>
> >
> > template<class T>
> >
> > void blah<T>::moo(T x)
> >
> > {
> >
> > cout << x << endl;
> >
> > }
> >
> >
> >
> > The following will work
> >
> > void main()
> >
> > {
> >
> > blah<double> y;
> >
> > y.foo(23);
> >
> > }
>
> main should return int --- and some compilers will insist on it.
>
>
>
> --
> John Carson