[Xapian-devel] C++ MatchDecider::operator() is const

[James Aylett]

On Thu, Oct 02, 2008 at 12:34:31PM +0100, Olly Betts wrote:

> > > The intention is certainly that a MatchDecider should make an
> > > independent decision about each document.
> > 
> > Can you cast away the constness of ``this''? I believe this is how you'd
> > implement caching, so there is a route for people who really know what
> > they're doing.
> 
> For caching, the usual approach is to declare the members variable(s)
> concerned as "mutable".

Ah, yes. Tricksy stuff, C++.

J

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  James Aylett                                                  xapian.org
  james at tartarus.org                               uncertaintydivision.org