#ifndef OBJECTIVES_HPP_
#define OBJECTIVES_HPP_

#include <string>
using namespace std;

/** Abstract base class of problem-specific objective function
 *  definitions; must be derived to yield concrete objectives. Only
 *  the concrete classes can be able to describe a given problem.
 */
class Objectives{
public:
    /**
     * Get number of objectives; up to the concrete classes to
     * determine how this is done, exactly.
     */
    virtual size_t nobj() const = 0;
    /**
     * Get a longer descriptive name for print-outs; default is
     * 'objective N' where N is ind+1.
     */
    virtual string name(size_t ind) const;
    /**
     * Get a short-hand symbol; default is 'objN' where N is ind+1.
     */
    virtual string symbol(size_t ind) const;
};

#endif