///////////////////////////////////////////////////////////////////////////////
//
//  Demonstrates use of boost::bind and spirit
//
//  [ JDG 10/16/2002 ]
//
///////////////////////////////////////////////////////////////////////////////
#include <boost/spirit/core.hpp>
#include <boost/bind.hpp>
#include <boost/ref.hpp>
#include <iostream>
#include <map>
#include <string>

///////////////////////////////////////////////////////////////////////////////
using namespace std;
using namespace spirit;
using namespace boost;

///////////////////////////////////////////////////////////////////////////////
//
//  Our comma separated list parser
//
///////////////////////////////////////////////////////////////////////////////
class pair_list_parser
{
public:

    typedef pair_list_parser self_t;
    typedef std::map<int, int> map_t;

    bool
    parse(char const* str)
    {
        int key;
        return spirit::parse(str,

            //  Begin grammar
            (
                '[' >>
                (
                    (
                            '('
                        >>  int_p       [assign(key)]
                        >>  ','
                        >>  int_p       [bind(&self_t::add, this, ref(key), _1)]
                        >>  ')'
                    )
                    % ','
                )
                >> ']'
            )
            ,
            //  End grammar

            space_p).full;
    }

    void add(int key, int val)
    {
        int_map[key] = val;
    }

    void
    print() const
    {
        for (map_t::const_iterator i = int_map.begin(); i != int_map.end(); ++i)
            cout << i->first << ", " << i->second << endl;
    }

    map_t int_map;
};

////////////////////////////////////////////////////////////////////////////
//
//  Main program
//
////////////////////////////////////////////////////////////////////////////
int
main()
{
    cout << "/////////////////////////////////////////////////////////\n\n";
    cout << "\tA comma separated int pair list parser for Spirit...\n";
    cout << "\tDemonstrates use of boost::bind and spirit\n";
    cout << "/////////////////////////////////////////////////////////\n\n";

    cout << "Give me a comma separated paired list of numbers of the form.\n";
    cout << "[(k1,n1),(k2,n2)(k3,n3)...].\n";
    cout << "The number pairs will be added in a map<int, int>\n";
    cout << "Type [q or Q] to quit\n\n";

    string str;
	while (getline(cin, str))
    {
        if (str[0] == 'q' || str[0] == 'Q')
            break;

        pair_list_parser lp;
        if (lp.parse(str.c_str()))
        {
            cout << "-------------------------\n";
            cout << "Parsing succeeded\n";
            lp.print();
            cout << "-------------------------\n";
        }
        else
        {
            cout << "-------------------------\n";
            cout << "Parsing failed\n";
            cout << "-------------------------\n";
        }
    }

    cout << "Bye... :-) \n\n";
    return 0;
}