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// Copyright Vladimir Prus 2002-2004.
// Distributed under the Boost Software License, Version 1.0.
// (See accompanying file LICENSE_1_0.txt
// or copy at http://www.boost.org/LICENSE_1_0.txt)
#include <boost/program_options.hpp>
using namespace boost;
namespace po = boost::program_options;
#include <iostream>
#include <algorithm>
#include <iterator>
using namespace std;
// A helper function to simplify the main part.
template<class T>
ostream& operator<<(ostream& os, const vector<T>& v)
{
copy(v.begin(), v.end(), ostream_iterator<T>(cout, " "));
return os;
}
int main(int ac, char* av[])
{
try {
int opt;
int portnum;
po::options_description desc("Allowed options");
desc.add_options()
("help", "produce help message")
("optimization", po::value<int>(&opt)->default_value(10),
"optimization level")
("verbose,v", po::value<int>()->implicit_value(1),
"enable verbosity (optionally specify level)")
("listen,l", po::value<int>(&portnum)->implicit_value(1001)
->default_value(0,"no"),
"listen on a port.")
("include-path,I", po::value< vector<string> >(),
"include path")
("input-file", po::value< vector<string> >(), "input file")
;
po::positional_options_description p;
p.add("input-file", -1);
po::variables_map vm;
po::store(po::command_line_parser(ac, av).
options(desc).positional(p).run(), vm);
po::notify(vm);
if (vm.count("help")) {
cout << "Usage: options_description [options]\n";
cout << desc;
return 0;
}
if (vm.count("include-path"))
{
cout << "Include paths are: "
<< vm["include-path"].as< vector<string> >() << "\n";
}
if (vm.count("input-file"))
{
cout << "Input files are: "
<< vm["input-file"].as< vector<string> >() << "\n";
}
if (vm.count("verbose")) {
cout << "Verbosity enabled. Level is " << vm["verbose"].as<int>()
<< "\n";
}
cout << "Optimization level is " << opt << "\n";
cout << "Listen port is " << portnum << "\n";
}
catch(exception& e)
{
cout << e.what() << "\n";
return 1;
}
return 0;
}
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