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# eoG3Replacement.h

    00001
    00024 //-----------------------------------------------------------------------------
    00025
    00026 #ifndef _eoG3Replacement_h
    00027 #define _eoG3Replacement_h
    00028
    00029
    00030 //-----------------------------------------------------------------------------
    00031 #include <eoPop.h>
    00032 #include <eoFunctor.h>
    00033 #include <eoMerge.h>
    00034 #include <eoReduce.h>
    00035 #include <utils/eoHowMany.h>
    00036 #include <eoReduceSplit.h>
    00037 //-----------------------------------------------------------------------------
    00038
    00049 template <class EOT>
    00050 class eoG3Replacement : public eoReplacement<EOT>
    00051 {
    00052 public:
    00053   eoG3Replacement(eoHowMany _howManyEliminatedParents = eoHowMany(2, false)) :
    00054     // split truncates the parents and returns eliminated parents
    00055     split(_howManyEliminatedParents, true),
    00056     // reduce truncates the offpsring and does not return eliminated guys
    00057     reduce(-_howManyEliminatedParents, false)
    00058   {}
    00059
    00060     void operator()(eoPop<EOT> & _parents, eoPop<EOT> & _offspring)
    00061     {
    00062       eoPop<EOT> temp;
    00063       split(_parents, temp);
    00064       unsigned toKeep = temp.size(); // how many to keep from merged populations
    00065       // merge temp into offspring
    00066       plus(temp, _offspring);      // add temp to _offspring (a little inconsistent!)
    00067
    00068       // reduce merged
    00069       reduce(_offspring, temp);    // temp dummy arg. will not be modified
    00070       // minimla check:
    00071       if (_offspring.size() != toKeep)
    00072         {
    00073           std::cerr << "Les tailles " << _offspring.size() << " " << toKeep << std::endl;
    00074         throw std::runtime_error("eoG3Replacement: wrong number of remaining offspring");
    00075         }
    00076       // and put back into _parents
    00077       plus(_offspring, _parents);
    00078     }
    00079
    00080 private:
    00081   eoLinearTruncateSplit<EOT> split; // few parents to truncate -> linear
    00082   eoTruncateSplit<EOT> reduce;     // supposedly many offspring to truncate
    00083   eoPlus<EOT> plus;
    00084 };
    00085
    00086 #endif