Re: [Boost-bugs] [Boost C++ Libraries] #7718: Basic rvalue and C++11 support (part 2)

Subject: Re: [Boost-bugs] [Boost C++ Libraries] #7718: Basic rvalue and C++11 support (part 2)
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2013-01-21 06:58:53

#7718: Basic rvalue and C++11 support (part 2)
---------------------------+------------------------------------------------
  Reporter:  apolukhin     |       Owner:  ebf         
      Type:  Patches       |      Status:  reopened    
 Milestone:  Boost 1.53.0  |   Component:  variant     
   Version:  Boost 1.52.0  |    Severity:  Optimization
Resolution:                |    Keywords:              
---------------------------+------------------------------------------------

Comment (by djowel):

 BTW, that "No" is in reply to "won't the user be confused by v2 holding an
 int (instead of recursive_wrapper)?".

 Perhaps there's a way to implement it without friend access, but I'm not
 sure. Anyway, the extra code is mostly TMP code for checking the the
 "blank" type.

 nullable_recursive_wrapper is a good idea, but there's this extra check
 for null on all access that makes it less optimal. And that null check
 will be there to make the 0.0000001% of the cases happy. I don't know what
 you mean by lazy_recursive_wrapper. Same thing? As for unique/shared_ptr,
 AFAICT, they won't work as plug-in replacements.

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/7718#comment:16>
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