Re: [Boost-bugs] [Boost C++ Libraries] #10853: problem with detection of const_cast_from

Subject: Re: [Boost-bugs] [Boost C++ Libraries] #10853: problem with detection of const_cast_from
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2014-12-06 19:09:28

#10853: problem with detection of const_cast_from
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  Reporter:  Matei David <matei@…>  |      Owner:  igaztanaga
      Type:  Bugs                   |     Status:  new
 Milestone:  To Be Determined       |  Component:  intrusive
   Version:  Boost 1.57.0           |   Severity:  Problem
Resolution:                         |   Keywords:
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Comment (by igaztanaga):

 const_cast_from must be a template because you can't only const_cast from
 a pointer to a const object but also from a non-const volatile object,
 const_cast also works for expressions that only remove volatile, etc.

 I agree that list::front() does not need to use const_cast_from but this
 expression:

 int *p = 0;
 const_cast<int*>(p);

 is valid, and const_cast_from tried to emulate all this permitted
 behaviour (specially to support some generic code where pointers passed as
 argumnets could be non-const-qualified.

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/10853#comment:2>
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