predicates.h

free library of genetic algorithms

/*
    cpplibga, free library of genetic algorithms.
    Copyright (C) 2003  Burger Y.A. (aka Jo Kruger)

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

Contacts:

   address: planet Terra
   e-mail:  [e-mail]
            [e-mail]
*/

#ifndef __CPPLIBGA_PREDICATES_H__
#define __CPPLIBGA_PREDICATES_H__

#include <assert.h>

namespace cpplibga
{
    struct Deleter
    {
	template<typename T>
	void operator ()(T x) const {delete x;}
    };

    class EqualByGenotype
    {
	    void* s;
	public:
	    EqualByGenotype(void* s) : s(s)
	    {
		assert(s);
	    }
	    
	    template<typename S>
	    bool operator ()(S* x) const
	    {
		assert(x);
		return static_cast<S*>(s)->getGenotype()==x->getGenotype();
	    }
    };

    class EqualByPhenotype
    {
	    void* s;
	public:
	    EqualByPhenotype(void* s) : s(s)
	    {
		assert(s);
	    }
	    
	    template<typename S>
	    bool operator ()(S* x) const
	    {
		assert(x);
		return static_cast<S*>(s)->calcFitness()==x->calcFitness();
	    }
    };

    struct XLessThanY
    {
	template<typename S>
	bool operator ()(S x, S y) const
	{
	    return(x->calcFitness() < y->calcFitness());
	}
    };

    struct XGreaterThanY
    {
	template<typename S>
	bool operator ()(S x, S y) const
	{
	    return(x->calcFitness() > y->calcFitness());
	}
    };
}

#endif