[Xapian-discuss] Filter or MatchDecider or Other?

[Olly Betts]

On Fri, Aug 20, 2004 at 09:08:10AM +0100, Sam Liddicott wrote:
> This feature (subclassing C++ classes in PHP) depends on automatic 
> callback support (with cookie values) in swig.
> We spend a long time discussing this; the best solution depended on 
> libffi which was supposed to become part of gcc, but did not seem 
> consistently available at the time.

The use of subclassing here isn't vital - it's just the most natural
way to do it in C++.  Another approach (perhaps more natural in other
languages) is to supply a call-back function.  Is that easier to do
with SWIG + PHP?  The SWIG docs referred me to the typemap section
which didn't seem to say...

Subclassing would really be needed for writing your own weighting
scheme, but I suspect that's a lot less common than wanting to use
a MatchDecider.

Cheers,
    Olly