"Tim Frink" <plfriko@[EMAIL PROTECTED]
> wrote in message
[snip]
> During compilation I get the error
> undefined reference to `void A::func<B>(bool (B::*)())'.
>
> The problems seem to be that during compilation of class B, the
> template function A::func is not completely known (just the
> function declaration of the header file, but not the function
> definition). I assume that one solution is to move the function
> body of A::func into the header file a.h to make it visible during
> compilation of class B.
>
> However, this seems not to be the best solution because I must
> reveal the implementation of A::func to anyone who wants to use
> it. Without templates, I could compile class A into a library
> and just provide the header file a.h together with the library.
> So, the users would not see the implementation of class A.
> However, when I move code from the source file into the header
> file, I show my implementation which I would like to avoid.
> Are there any solutions for that? Or are templates in general
> crucial when source code must be kept closed?
Check this FAQ --
http://www.para****ft.com/c++-faq-lite/templates.html#faq-35.14
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