[pkg-boost-devel] Bug#335613: bug in documetation of program options library (Re: [boost] [1.34] branch for release on Monday)

Domenico Andreoli cavok at tiscali.it
Mon Mar 20 11:33:38 UTC 2006

On Sat, Mar 18, 2006 at 10:52:32PM -0800, Thomas Witt wrote:
> Hi,


> I am going to create the release branch on Monday March 20 around 6pm 
> PST. Please resolve as many outstanding issues as possible before the 
> branch is done.

i have a bug reported against boost debian package.

It is from LI Daobing <lidaobing at gmail.com>:

  "In [1], Section `Positional Options', the last example [2] doesn't work.
  positional_options_description::add return void, and it has no
  add_optional method;


  positional_options_description pd;
  pd.add("output-file", 2).add_optional("input-file", -1);"

for the full report, please visit http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=335613.

indeed  a simple program like:

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

int main(int ac, char* av[])
    po::positional_options_description pd;
    pd.add("output-file", 2).add_optional("input-file", -1);

    return 0;

fails to build with the following gcc error message:

test.cpp: In function 'int main(int, char**)':
test.cpp:7: error: invalid use of 'void'


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