[Boost-bugs] [Boost C++ Libraries] #3361: [Program Options] Bug: empty arguments treated as positional ones

Subject: [Boost-bugs] [Boost C++ Libraries] #3361: [Program Options] Bug: empty arguments treated as positional ones
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2009-08-24 00:19:55

#3361: [Program Options] Bug: empty arguments treated as positional ones
---------------------------------------------------+------------------------
 Reporter:  k-r.ernst@…                            |       Owner:  vladimir_prus  
     Type:  Bugs                                   |      Status:  new            
Milestone:  Boost 1.40.0                           |   Component:  program_options
  Version:  Boost 1.39.0                           |    Severity:  Problem        
 Keywords:  program options whitespace positional  |  
---------------------------------------------------+------------------------
 Tested with boost::program_options in 1.39

 When an program argument is empty, or contains only whitespace, it it
 treated as positional argument,  confusing program_options

 How to reproduce:

 1. Get example app which expects 1 positional argument

 2. launch it with e.g. execlp("testapp", "testapp", "",
 "real_positional_argument", NULL);

 Observed behavior:
 Error: "too many positional options"

 Expected behavior:
 Empty argument should be ignored

 Additional note:
 instead of empty string "", the same error happens with only whitespace
 like " "

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/3361>
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