Re: [Boost-bugs] [Boost C++ Libraries] #4427: for_each does not take a non-const Function object

Subject: Re: [Boost-bugs] [Boost C++ Libraries] #4427: for_each does not take a non-const Function object
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2012-06-13 23:56:40

#4427: for_each does not take a non-const Function object
--------------------------------+-------------------------------------------
  Reporter:  chetant@…          |       Owner:  djowel  
      Type:  Bugs               |      Status:  reopened
 Milestone:  Boost 1.44.0       |   Component:  fusion  
   Version:  Boost 1.43.0       |    Severity:  Problem 
Resolution:                     |    Keywords:  for_each
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Comment (by djowel):

 And indeed my comments were all bogus. Please ignore. I realize now that
 this is about adding a non-const overload for function object, not the
 sequence (which has been there for a long time now).

 So, indeed it still stands as -not-a-bug-. See the documentation:
 http://tinyurl.com/7uxyovh

 It is clear there that you can't expect F to be mutable. F can be passed
 around by value and any changes there will not update the actual F you
 passed in. Even STL algorithms are designed that way, so I am not sure why
 you are surprised (e.g.
 http://en.cppreference.com/w/cpp/algorithm/for_each; notice UnaryFunction
 f)

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/4427#comment:6>
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