[Boost-bugs] [Boost C++ Libraries] #4927: Incorrect behavior of method clear() for class program_options::variables_map

Subject: [Boost-bugs] [Boost C++ Libraries] #4927: Incorrect behavior of method clear() for class program_options::variables_map
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2010-12-03 17:14:37

#4927: Incorrect behavior of  method clear() for class
program_options::variables_map
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 Reporter:  degtyariov.a@…          |       Owner:  vladimir_prus  
     Type:  Bugs                    |      Status:  new            
Milestone:  To Be Determined        |   Component:  program_options
  Version:  Boost 1.45.0            |    Severity:  Problem        
 Keywords:                          |  
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 The method clears only members inherited from the std::map. But what about
 other members of class variables_map (m_final, m_required)?

 It is lead to strange behavior in next case:
  1) parse default config file and fill corresponding "config file"
 variables_map;

  2) parse command line (into another variables_map), get name of custom
 config file;

  3) call clear() for "config file" variables_map and parse new file and
 refill "config file" variables_map again;

  4) output all values of the "config file" variables_map and denote which
 of them are defaulted

 Workaround: reassign new instance of variables_map instead call clear().

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Ticket URL: <https://svn.boost.org/trac/boost/ticket/4927>
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