Re: [Boost-bugs] [Boost C++ Libraries] #5963: Patch [Fixes #5961]: Disallow comparisons of differing iterator types in ptr_container

Subject: Re: [Boost-bugs] [Boost C++ Libraries] #5963: Patch [Fixes #5961]: Disallow comparisons of differing iterator types in ptr_container
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2011-09-29 16:14:11

#5963: Patch [Fixes #5961]: Disallow comparisons of differing iterator types in
ptr_container
--------------------------------------------------+-------------------------
  Reporter:  Rob Desbois <rob.desbois@…>          |       Owner:  nesotto                
      Type:  Patches                              |      Status:  new                    
 Milestone:  To Be Determined                     |   Component:  ptr_container          
   Version:  Boost 1.47.0                         |    Severity:  Problem                
Resolution:                                       |    Keywords:  iterator, type, compare
--------------------------------------------------+-------------------------

Comment (by Rob Desbois <rob.desbois@…>):

 Ah yes, didn't think of the number of resulting types that would be
 generated..

 Using enable_if<> etc. as you suggest looks good. Since we can't use
 enable_if<> either as a dummy parameter (since these are binary operators)
 or as the return value (since we're using it) I'd suggest we create a
 helper traits that defines non-operator equivalents of these operations.
 Would you agree that's the way to go?

 (NB: we technically /could/ put enable_if<> in the return, but that would
 make for a horrible public interface.)

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/5963#comment:3>
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