Re: [Boost-users] A error when using long option description, program_options library

From: Huifeng Shen (useradd_at_[hidden])
Date: 2005-09-06 07:50:58

I change the demo code of program_option first.cpp as below, when I compiled
with
cl /MDd /EHsc /D "BOOST_ANY_DYN_LINK" /D "_STLP_DEBUG" first.cpp
when run "first --help", a runtime error will occur.
when  cl /MD /EHsc /D "BOOST_ANY_DYN_LINK" first.cpp, there is no runtime
error running "first --help".
----------------------------------------------------------------------------
-------------------
#include <boost/program_options.hpp>
namespace po = boost::program_options;

#include <iostream>
#include <iterator>
using namespace std;

int main(int ac, char* av[])
{
    try {

        po::options_description desc("Allowed options");
        desc.add_options()
            ("help", "produce help message, a very very very very very long
long long long long long information") // The reason of rumtime error
            ("compression", po::value<int>(), "set compression level")
        ;

        po::variables_map vm;
        po::store(po::parse_command_line(ac, av, desc), vm);
        po::notify(vm);

        if (vm.count("help")) {
            cout << desc << "\n";
            return 1;
        }

        if (vm.count("compression")) {
            cout << "Compression level was set to "
                 << vm["compression"].as<int>() << ".\n";
        } else {
            cout << "Compression level was not set.\n";
        }
    }
    catch(exception& e) {
        cerr << "error: " << e.what() << "\n";
        return 1;
    }
    catch(...) {
        cerr << "Exception of unknown type!\n";
    }

    return 0;
}
----------------------------------------------------------------------------
------------------------

I also trace the error and find it occurs in the code
call format_one()/format_description/format_paragraph
The error code is line 361, options_description.cpp:

                    if (line_begin + (line_length - indent) > par_end)
                    {
                        line_end = par_end;
                    }
                    else
                    {
                        line_end = line_begin + (line_length - indent);
                    }

----- Original Message ----- 
From: "Vladimir Prus" <ghost_at_[hidden]>
To: <boost-users_at_[hidden]>
Sent: Tuesday, September 06, 2005 1:51 PM
Subject: Re: [Boost-users] A error when using long option
description,program_options library

> ??? wrote:
>
> > This runtime error only occurs when debug version, the release version
has
> > no such problem. The long option description can not be printed.
> >
> > My platform is vc7.1+stlport 4.62+boost 1.33, I also define the macro
> > _STLP_DEBUG and BOOST_LIB_DIAGNOSTIC.
> >
> > Some extraction of my code:
> >     operatoins.add_options()
> >       ("difference,d", "Get all the word of mine, origin file, my file,
> > output file")
>
> .......
>
>
> > when print "Get all the word of mine, origin file, my file, output ", a
> > runtime error occurs, the program terminates.
>
> Please provide the minimal complete program that reproduces this, and I'll
> try to debug this.
>
> - Volodya
>
> _______________________________________________
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>