outside type, outside function

[Krzysztof Poc]

Hi

I have the following code.

template <class T>
class Frame {
typename T::areaT m_area;

public:
typename T::areaT set ( typename T::areaT area ) {}
};

class Rectangle {
public:
typedef int areaT;
};

int main ( void )
{
Frame < Rectangle > r;
return 0;
}



I would like to define a Frame<T>::set function outside of class
definition.
I did it as follows.

template <class T>
typename T::areaT Frame<T>::set ( typename T::areaT area ) {}

It compiles but I'm not sure whether it is correct.
Could you please confirm it. In case it isn't correct please type a
correct
one.

thanks

 

[Victor Bazarov]

I have the following code.

template<class T>
class Frame {
typename T::areaT m_area;

public:
typename T::areaT set ( typename T::areaT area ) {}

};

class Rectangle {
public:
typedef int areaT;
};

int main ( void )
{
Frame< Rectangle> r;
return 0;
}



I would like to define a Frame<T>::set function outside of class
definition.
I did it as follows.

template<class T>
typename T::areaT Frame<T>::set ( typename T::areaT area ) {}

No 'return'? Seems like a compile error waiting for you to try using
that function.

It compiles but I'm not sure whether it is correct.
Could you please confirm it. In case it isn't correct please type a
correct
one.

To confirm whether it's the one or not, you should try using it. A
template is not instantiated until it's used, it's only syntax-parsed
but no types are verified, etc.

V