Re: [Boost-users] generic programming : variadic virtual function

27 Aug 2009


      On Thu, Aug 27, 2009 at 6:04 AM, Bruno Lalande wrote:
...
...
Yes, in fact after I found no answers in my mailbox this morning I
noodled on the problem some more and came up with that solution.  The
difficulty is that there is a lot of non-variadic cruft common to the
general and specialized template classes. I didn't want to repeat all of
that.
Another way to solve that could be to isolate the variadic stuff if a
class (named "foo" below):
template 
class foo
{
   void operator()(S, W);
};
template <typename S>
class foo
{
   void operator()(S);
};
template 
class derived:
   public foo,
   public baseclass
{
   // common non-variadic stuff
};
If I remember the C++ rules well, the operator() in "foo" would
properly override the virtual operator() of "baseclass" in "derived".
You can use a CRTP if "foo" needs anything in "derived" for its
implementation...
I actually had a rather identical problem as the first post, but I
solved it rather easily using Boost.Fusion building up a helper struct
to act as the operator().

Re: [Boost-users] generic programming : variadic virtual function

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