id,summary,reporter,owner,description,type,status,milestone,component,version,severity,resolution,keywords,cc
689,[program_options] Endless loop with long default arguments,ensc,Vladimir Prus,"{{{
when using a po::value with a representation of the default value
having a certain length, 'std::cout << opts' will stuck in an endless
loop.

E.g.

-----
#include <boost/program_options.hpp>
#include <string>
#include <iostream>

namespace po = boost::program_options;

int main(int argc, char *argv[])
{
  po::options_description		opts;
  opts.add_options()
    (""cfgfile,c"",
     po::value<std::string>()->default_value(""/usr/local/etc/myprogramXXXXXXXXX/configuration.conf""),
     ""the configfile"");

  std::cout << opts;
}
-----

| $ rpm -q boost
| boost-1.33.1-5
| 
| $ g++ foo.c  -lboost_program_options
| $ strace ./a.out
| ...
| write(1, ""  -c [ --cfgfile ] arg (=/usr/lo""..., 80  -c [ --cfgfile ] arg (=/usr/local/etc/myprogramXXXXXXXXX/configuration.conf) 
| ) = 80
| write(1, ""                                ""..., 80                                                                               
| ) = 80
| write(1, ""                                ""..., 80                                                                               
| ) = 80
| ...



Removing one 'X' will result in an ugly

|   -c [ --cfgfile ] arg (=/usr/local/etc/myprogramXXXXXXXX/configuration.conf) t
|                                                                               h
|                                                                               e
|                                                                               c
|                                                                               o
|                                                                               n
|                                                                               f
|                                                                               i
|                                                                               g
|                                                                               f
|                                                                               i
|                                                                               l
|                                                                               e

output.


It would be nice, when:

- the default value could be moved into the description column
- the description would begin on a new line and an earlier column
  (e.g. 30-40) when option name/default-value are too long (> 30-40
  chars)

}}}",Bugs,closed,Boost 1.42.0,program_options,None,Problem,fixed,,s.ochsenknecht@…