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# eoScalarFitness.h

    00001 /* -*- mode: c++; c-indent-level: 4; c++-member-init-indent: 8; comment-column: 35; -*-
    00002
    00003   -----------------------------------------------------------------------------
    00004   eoScalarFitness.h
    00005
    00006  (c) Maarten Keijzer (mkeijzer@mad.scientist.com) and GeNeura Team, 1999, 2000
    00007
    00008     This library is free software; you can redistribute it and/or
    00009     modify it under the terms of the GNU Lesser General Public
    00010     License as published by the Free Software Foundation; either
    00011     version 2 of the License, or (at your option) any later version.
    00012
    00013     This library is distributed in the hope that it will be useful,
    00014     but WITHOUT ANY WARRANTY; without even the implied warranty of
    00015     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    00016     Lesser General Public License for more details.
    00017
    00018     You should have received a copy of the GNU Lesser General Public
    00019     License along with this library; if not, write to the Free Software
    00020     Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
    00021
    00022     Contact: todos@geneura.ugr.es, http://geneura.ugr.es
    00023  */
    00024
    00025
    00026 #ifndef eoScalarFitness_h
    00027 #define eoScalarFitness_h
    00028
    00029 #include <functional>
    00030 #include <iostream>
    00031
    00042 template <class ScalarType, class Compare >
    00043 class eoScalarFitness
    00044 {
    00045     public :
    00046
    00047     eoScalarFitness() : value() {}
    00048     eoScalarFitness(const eoScalarFitness& other) : value(other.value) {}
    00049     eoScalarFitness(const ScalarType& v) : value(v) {}
    00050
    00051     eoScalarFitness& operator=(const eoScalarFitness& other)
    00052     { value = other.value; return *this; }
    00053     eoScalarFitness& operator=(const ScalarType& v)
    00054     { value = v; return *this; }
    00055
    00056     operator ScalarType(void) const { return value; }
    00057
    00059     bool operator<(const eoScalarFitness& other) const
    00060     { return Compare()(value, other.value); }
    00061
    00062     // implementation of the other operators
    00063     bool operator>( const eoScalarFitness<ScalarType, Compare>& y ) const  { return y < *this; }
    00064     // implementation of the other operators
    00065     bool operator<=( const eoScalarFitness<ScalarType, Compare>& y ) const { return !(*this > y); }
    00066     // implementation of the other operators
    00067     bool operator>=(const eoScalarFitness<ScalarType, Compare>& y ) const { return !(*this < y); }
    00068
    00069
    00070     private :
    00071         ScalarType value;
    00072 };
    00073
    00080 typedef eoScalarFitness<double, std::less<double> >    eoMaximizingFitness;
    00081 typedef eoScalarFitness<double, std::greater<double> > eoMinimizingFitness;
    00082
    00083 template <class F, class Cmp>
    00084 std::ostream& operator<<(std::ostream& os, const eoScalarFitness<F, Cmp>& f)
    00085 {
    00086     os << (F) f;
    00087     return os;
    00088 }
    00089
    00090 template <class F, class Cmp>
    00091 std::istream& operator>>(std::istream& is, eoScalarFitness<F, Cmp>& f)
    00092 {
    00093     F value;
    00094     is >> value;
    00095     f = value;
    00096     return is;
    00097 }
    00098
    00099 #endif