subset.h

// Description: Subset class
// Detail: Iterates through all fixed-sized subsets of an integer interval.
// Documentation: miscellaneous.txt

#ifndef PASTELSYS_SUBSET_H
#define PASTELSYS_SUBSET_H

#include "pastel/sys/mytypes.h"

#include <vector>

namespace Pastel
{

    //! Iterates through all fixed-sized subsets of an integer interval.
    class Subset
    {
    public:
        Subset();
        Subset(integer size, integer elements);

        void swap(Subset& that);

        void first();
        bool next();

        void setSize(integer size);
        void setSize(integer size, integer elements);

        integer size() const;
        integer elements() const;

        integer operator[](integer index) const;

    private:
        std::vector<integer> data_;
        integer elements_;
    };

}

#include "pastel/sys/subset.hpp"

#endif