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: |

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.

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