Ticket #5464: test_progopts.cpp

#include <iostream>
#include <iomanip>
#include <vector>
#include <boost/program_options.hpp>

using namespace std;
using namespace boost::program_options;

template<typename T>
ostream& operator<<(ostream& os, const vector<T>& v)
{
    copy(v.begin(), v.end(), ostream_iterator<T>(cout, " "));
    return os;
}

int main(int avArgc, char* apArgv[])
{
        try
        {
                // Define the allowed options.
                bool vBoolOpt;
                options_description vVisibleOpts("Visible options");
                vVisibleOpts.add_options()
                (
                        "help,?", "produce help message"
                )
                (
                        "bool-opt,a", value<bool>(&vBoolOpt)->implicit_value(true)->default_value(false), "a boolean option"
                );
                vector<string> vVectorOpt;
                options_description vHiddenOpts("Hidden options");
                vHiddenOpts.add_options()
                (
                        "input-file", value< vector<string> >(&vVectorOpt), "input file"
                );
                positional_options_description vPositional;
                vPositional.add("input-file", -1);
                options_description vAllOpts;
                vAllOpts.add(vVisibleOpts).add(vHiddenOpts);
                options_description vAllowOpts("Allowed options");
                vAllowOpts.add(vVisibleOpts);

                // Parse and store the options.
                variables_map vVarMap;
                store(command_line_parser(avArgc, apArgv).options(vAllOpts).positional(vPositional).run(), vVarMap);
                notify(vVarMap);

                // Display help or the value of the options.
                if (vVarMap.count("help") != 0)
                {
                        cout << vAllowOpts << endl;
                }
                else
                {
                        cout << "vBoolOpt = " << boolalpha << vBoolOpt << endl;
                        cout << "vVectorOpt = " << vVectorOpt << endl;
                }
        }
        catch (exception& e)
        {
                cout << e.what() << endl;
                return 1;
        }
        return 0;
}