Templates, nested classes and static members

[Guest]

Hi!
I've just read the Multicast-Observer = Typed message article and
implemented the template at the end of the article. The implementation
looks like this:

#include <list>

template<typename T>
class Message
{
public:
class MessageReceiver
{
public:
virtual void process(const T& message) = 0;
};

...

typedef std::list<MessageReceiver*> MessageReceiverList;
private:

static MessageReceiverList m_messageReceivers;
};

template<typename T>
Message<T>::MessageReceiverList Message<T>::m_messageReceivers;

For some reason I get an compile error at the last line, the defintion
of the static member. Any ideas why?

/M

 

[Victor Bazarov]

I've just read the Multicast-Observer = Typed message article and
implemented the template at the end of the article. The implementation
looks like this:

#include <list>

template<typename T>
class Message
{
public:
class MessageReceiver
{
public:
virtual void process(const T& message) = 0;
};

...

typedef std::list<MessageReceiver*> MessageReceiverList;
private:

static MessageReceiverList m_messageReceivers;
};

template<typename T>
Message<T>::MessageReceiverList Message<T>::m_messageReceivers;

For some reason I get an compile error at the last line, the defintion
of the static member. Any ideas why?

No. If I take your code, remove the '...' and then compile it, I don't
get any error message. So, what message? Care to post code without
'...'?

V