virtual templated functions?

virtual templated functions?

[Tom Lien]

I am trying to do something like this:

class Item {

  template<class target_iter>
  virtual void use(target_iter begin, target_iter end) = 0;

};

g++ says that this is an invalid use of 'virtual' in template declaration.
Is this a language limitation? Is it just not implemented yet? If this
is an impossible feature is there a workaround or alternative that could
serve my needs as well?

Thanks

-------------------------------------------------
Tom Lien
http://www.mrs.umn.edu/~lient --The Funk Palace

How's My Programming? Call 1-800-DEV-NULL

Re: virtual templated functions?

[Gabriel Dos Reis]

Tom Lien <lient@mrs.umn.edu> writes:

| I am trying to do something like this:
| 
| class Item {
| 
|   template<class target_iter>
|   virtual void use(target_iter begin, target_iter end) = 0;
| 
| };
| 
| g++ says that this is an invalid use of 'virtual' in template declaration.
| Is this a language limitation? Is it just not implemented yet? If this
| is an impossible feature is there a workaround or alternative that could
| serve my needs as well?

There is no such thing as a virtual template member function. Please,
consider asking on C++ specific forums. This list is for GCC
development.

Regards,

-- Gaby
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