Re: [Boost-bugs] [Boost C++ Libraries] #2994: default value output precision

Subject: Re: [Boost-bugs] [Boost C++ Libraries] #2994: default value output precision
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2009-11-10 13:42:29

#2994: default value output precision
------------------------------+---------------------------------------------
 Reporter:  anonymous         |       Owner:  vladimir_prus  
     Type:  Feature Requests  |      Status:  new            
Milestone:  Boost 1.39.0      |   Component:  program_options
  Version:  Boost 1.38.0      |    Severity:  Not Applicable 
 Keywords:                    |  
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Comment(by s.ochsenknecht@…):

 I'm afraid that a certain, hard coded, output precision wouldn't satisfy
 all users. But there as an overloaded version of default_value() which can
 be used to define the string representation of the default value:

 {{{
 ("maxlength", po::value<double>(&MaxLength?)->default_value(.1, "0.1"),
 "Maximum edge length to keep.")
 }}}

 This string is then used for the help output. I would recommend to use
 this approach.

 I attached a test case to show the usage of this functionality. Maybe
 documentation needs to be updated.

 Please comment.

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/2994#comment:1>
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