I'm having some trouble using the program_options library.
Here is some code slightly modified from an example in the documentation for
boost::program_options.
<code>
#include <iostream>
#include <vector>
#include <string>
#include
#include
#include
namespace po = boost::program_options;
int main(int argc, char ** argv) {
po::positional_options_description desc;
desc.add("files", -1);
std::cout << "Declared positional options." << std::endl;
po::variables_map vm;
po::store(po::command_line_parser(argc, argv).positional(desc).run(), vm);
std::cout << "Stored command line arguments into vm." << std::endl;
po::notify(vm);
std::cout << "Notified vm that all args have been parsed" << std::endl;
std::cout << " num files specified: " << vm.count("files") << std::endl;
std::vectorstd::string files = vm["files"].asstd::string
();
for (unsigned int i = 0; i < files.size(); ++i) {
std::cout << "file: " << files[i] << std::endl;
}
return 0;
}
</code>
Linking with version 1.40, the above code, when run with the command line
arguments "hello world", produces the following output:
<shell>
Declared positional options.
terminate called after throwing an instance of
'boost::exception_detail::clone_\
impl >'
what(): unknown option files
Aborted
</shell>
Linking with version 1.43, the above code, when run with the command line
arguments "hello world", produces the following output:
<shell>
Declared positional options.
Segmentation fault
</shell>
Am I missing something about how to use positional arguments with this
library?
I am using Ubuntu 10.04 on x86. The 1.40 version of boost::program_options
was installed through the repositories, I compiled the 1.43 version
manually.
Jeffrey
