Re: [Boost-bugs] [Boost C++ Libraries] #545: Proogram_options: Fails to parse options with a common root

Subject: Re: [Boost-bugs] [Boost C++ Libraries] #545: Proogram_options: Fails to parse options with a common root
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2010-06-22 13:11:23

#545: Proogram_options: Fails to parse options with a common root
---------------------+------------------------------------------------------
  Reporter:  rleigh  |       Owner:  vladimir_prus
      Type:  Bugs    |      Status:  closed       
 Milestone:          |   Component:  None         
   Version:  None    |    Severity:  Problem      
Resolution:  Fixed   |    Keywords:               
---------------------+------------------------------------------------------
Changes (by christian.blichmann@…):

  * severity:  => Problem

Comment:

 As of Boost 1.43.0 this is still problematic, see the test case below:

  #include <iostream>
  #include <boost/program_options.hpp>
  namespace po = boost::program_options;

  int main(int argc, char *argv[])
  {
      try
      {
          bool all, all_chroots, all_sessions;

          po::options_description chroot("Chroot selection");
          chroot.add_options()
              ("flag",  "Some boolean flag")
              ("flag2", "Another flag that gets matched approximately");

          po::variables_map vm;
          po::store(po::parse_command_line(argc, argv, chroot), vm);
          po::notify(vm);

          std::cout << "flag:  " << vm.count("flag") << std::endl;
          std::cout << "flag2: " << vm.count("flag2") << std::endl;

          return 0;
      }
      catch (std::exception const& e)
      {
          std::cerr << e.what() << std::endl;
          return 1;
      }
  }


  Results:

  $ g++ -o po-test po-test.cpp -lboost_program_options
  $ ./po-test --flag
  flag:  0
  flag2: 1
  $ ./po-test --flag2
  flag:  0
  flag2: 1
  $ ./po-test --flag --flag2
  multiple occurrences


  Expected results (after applying program_options.patch):

  $ ./po-test --flag
  flag:  1
  flag2: 0
  $ ./po-test --flag2
  flag:  0
  flag2: 1
  $ ./po-test --flag --flag2
  flag:  1
  flag2: 1

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/545#comment:2>
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