Re: [Boost-bugs] [Boost C++ Libraries] #2982: Required Arguments

Subject: Re: [Boost-bugs] [Boost C++ Libraries] #2982: Required Arguments
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2009-11-04 12:08:04

#2982: Required Arguments
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 Reporter:  David Doria <daviddoria@…>          |       Owner:  vladimir_prus  
     Type:  Feature Requests                    |      Status:  new            
Milestone:  Boost 1.39.0                        |   Component:  program_options
  Version:  Boost Development Trunk             |    Severity:  Not Applicable 
 Keywords:  Required Arguments                  |  
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Comment(by s.ochsenknecht@…):

 I implemented option (1), see patch_ticket2982_2.diff and the attached
 testcase required.cpp.

 store() now adds empty variable_value's to the variable_map. I also
 override the count() method of the underlying std::map in that way that
 the empty variable_values are not counted.

 Hm, this can have some side effects when operator[] is used:
 const variable_value& operator[](const std::string& name) const

 But I think the user has to check for !empty() anyhow ..!?

 Please comment.

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Ticket URL: <https://svn.boost.org/trac/boost/ticket/2982#comment:6>
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