[Boost-users] program_options: Printing description problem

From: sj_at_[hidden]
Date: 2007-12-03 14:58:35

Hello,

When I try to output options_description to cout (response to --help
option, to show all available options) I get an assertion in in xstring
header file. It's caused by execution format_paragraph function in
option_description.cpp line 381. I narrowed down the problem to the
length of the description for an option. This is the code:

#include <boost/program_options.hpp>
namespace po = boost::program_options;
int main(int argc, char **argv){
        po::options_description desc("t");
        desc.add_options()("h",  
"1234567890qwertyuiopasdfghjklzxcvbnmQWERTYUIOPASDFGHJKLZ");
        po::variables_map vm;
        po::store(po::parse_command_line(argc, argv, desc), vm);
        po::notify(vm);
        if(vm.count("h")){std::cout<<desc<<"\n"; return 1;}
        return 0;
}
If I remove last Z in the description of h parameter the program works,
otherwise it crashes. If I replace the message with some words, meaning
if spaces are present, it still crashes (that's how I originally
discovered the problem). What am I doing wrong, or how can I avoid this
situation (other than decreasing the length of the descriptions for all
of my parameters).

I'm using boost 1.33.1 (how can I find out what was done to
program_options in 1.34.1?) and Microsoft Visual Studio 2005
Professional. The project is compiled as Multi-threaded DLL

Thanks.
-- 
Regards, Alexander.           http://sjcomp.com