Re: [Boost-bugs] [Boost C++ Libraries] #7577: base_from_member with reference types

Subject: Re: [Boost-bugs] [Boost C++ Libraries] #7577: base_from_member with reference types
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2013-02-05 18:32:38

#7577: base_from_member with reference types
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  Reporter:  K-ballo <kaballo86@…>            |       Owner:  viboes  
      Type:  Bugs                             |      Status:  assigned
 Milestone:  To Be Determined                 |   Component:  utility 
   Version:  Boost 1.52.0                     |    Severity:  Problem 
Resolution:                                   |    Keywords:          
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Comment (by viboes):

 Replying to [comment:4 kaballo86@…]:
 > I could tell you more about the specific use cases, but I think you are
 missing the point. When instantiating a `base_from_member` with a
 reference type the member will contain a dangling reference. There is no
 error, no warning, no assertion; only a crash at runtime if you are lucky
 enough.

 No I didn't missed the point.

 > A reference `base_from_member` cannot be properly initialized (I even
 failed to get it working by using `boost::ref/cref`). If my fix is
 rejected, then at least there should be an assert or a big bold note in
 `base_from_member` documentation saying that `base_from_member` cannot be
 used with reference types. That is unless you could tell me how would I
 properly initialize a `base_from_member` instantiated with a reference
 type.

 I understand the problem and how your patch solves the issue.

 Note that I'm not against your patch, I was just curious to know when you
 use one or the other.

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/7577#comment:5>
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