[Xapian-tickets] [Xapian] #186: MatchDeciders should be reference counted

[Xapian]

#186: MatchDeciders should be reference counted
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 Reporter:  richard      |        Owner:  nobody   
     Type:  defect       |       Status:  new      
 Priority:  normal       |    Milestone:  1.1.0    
Component:  Library API  |      Version:  SVN trunk
 Severity:  normal       |   Resolution:           
 Keywords:               |    Blockedby:           
 Platform:  All          |     Blocking:  182      
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Comment(by richard):

 On reflection, I think the only way to make MatchDeciders,
 ValueRangeProcessors, and other user-defined subclasses reference counted
 is to expose the reference counting mechanism fully.  Without this, I
 don't think there's any hope of making the bindings work correctly with
 the reference counting.

 SWIG has support for reference counting (and other smart pointers) with
 some of its backends - but I'm not convinced it has support for all the
 backends which we require.

 My favoured long-term solution would be to move xapian (at least, the
 publically exposed parts of xapian) over to using Boost::shared_ptr, and
 other smart pointers.  This would make it easier to use xapian correctly
 from other Boost using C++ projects, and avoid us having to maintain our
 own smart pointer implementations, and make it easier to integrate with
 the SWIG reference counting support.

 However, doing this is probably too major a change to be considered for
 1.1, so I suggest postponing until a fictional future 2.0 release.

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Ticket URL: <http://trac.xapian.org/ticket/186#comment:19>
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