static member function in class template

[Martin Vorbrodt]

SO i have a class:

template<typename T>
class Vector {
public:
static const Vector<T> UNIT_X();
};

template<typename T>
static const Vector<T> UNIT_X() {
static const Vector<T> unit_x(1,0,0);
return unit_x;
}

GCC 3.4 tell me i can't declare UNIT_X member function to have static
linkage.

How do i go about having such static function.

I want to be able to do Vector<int>::UNIX_X();

Please help.

Martin

[mlimber]

Martin Vorbrodt wrote:

SO i have a class:

template<typename T>
class Vector {
public:
static const Vector<T> UNIT_X();
};

template<typename T>
static const Vector<T> UNIT_X() {
Try this line instead:

const Vector<T> Vector<T>::UNIT_X() {
static const Vector<T> unit_x(1,0,0);
return unit_x;
}

GCC 3.4 tell me i can't declare UNIT_X member function to have static
linkage.

How do i go about having such static function.

I want to be able to do Vector<int>::UNIX_X();

Please help.

Martin

Cheers! --M

[Martin Vorbrodt]

of course, thanks! silly me.

now another thing. the static function must be defined in the header file as
well right? doesn't that violate ODR?

martin

"mlimber" <ml*****@gmail.com> wrote in message
news:11**********************@g14g2000cwa.googlegr oups.com...

Martin Vorbrodt wrote:

SO i have a class:

template<typename T>
class Vector {
public:
static const Vector<T> UNIT_X();
};

template<typename T>
static const Vector<T> UNIT_X() {

Try this line instead:

const Vector<T> Vector<T>::UNIT_X() {

static const Vector<T> unit_x(1,0,0);
return unit_x;
}

GCC 3.4 tell me i can't declare UNIT_X member function to have static
linkage.

How do i go about having such static function.

I want to be able to do Vector<int>::UNIX_X();

Please help.

Martin

Cheers! --M

[John Harrison]

Martin Vorbrodt wrote:

of course, thanks! silly me.

now another thing. the static function must be defined in the header file as
well right? doesn't that violate ODR?

templates are an exception to ODR.

john

[puzzlecracker]

John Harrison wrote:

Martin Vorbrodt wrote:

of course, thanks! silly me.

now another thing. the static function must be defined in the header file as
well right? doesn't that violate ODR?

templates are an exception to ODR.

john

what is ODR (one definition rule)?

[ma740988]

|| what is ODR (one definition rule)?
Yep!!

[puzzlecracker]

[e-mail] wrote:

|| what is ODR (one definition rule)?
Yep!!

I don't think "Yep" is a definition. Get a life -trol!

[Martin Vorbrodt]

Even static members of templates? Well, I believe it, the code works, but...
feels dirty. Static functions definitions in header files... I guess export
would fix that. Too bad my compiler doesn't this so;)

Anyone knows a 100% conforming compiler? Is there one in works?

Thanx

"John Harrison" <jo*************@hotmail.com> wrote in message
news:JE*****************@newsfe4-gui.ntli.net...

Martin Vorbrodt wrote:

of course, thanks! silly me.

now another thing. the static function must be defined in the header file
as
well right? doesn't that violate ODR?

templates are an exception to ODR.

john

[Kai-Uwe Bux]

a) please don't top post.

Martin Vorbrodt wrote:

Even static members of templates? Well, I believe it, the code works,
but... feels dirty. Static functions definitions in header files...
Why dirty? I consider support for separate compilation more an issue of
speeding up the built process and not that much an issue of code
organization.

I guess export would fix that. Too bad my compiler doesn't this so;)

Anyone knows a 100% conforming compiler? Is there one in works?

Check out http://www.comeaucomputing.com/
Best

Kai-Uwe Bux