ifthenelse.cpp

非常好的进化算法EC 实现平台 可以实现多种算法 GA GP

/*
 *  Open BEAGLE
 *  Copyright (C) 2001-2005 by Christian Gagne and Marc Parizeau
 *
 *  This library is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU Lesser General Public
 *  License as published by the Free Software Foundation; either
 *  version 2.1 of the License, or (at your option) any later version.
 *
 *  This library 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
 *  Lesser General Public License for more details.
 *
 *  You should have received a copy of the GNU Lesser General Public
 *  License along with this library; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 *  Contact:
 *  Laboratoire de Vision et Systemes Numeriques
 *  Departement de genie electrique et de genie informatique
 *  Universite Laval, Quebec, Canada, G1K 7P4
 *  http://vision.gel.ulaval.ca
 *
 */

/*!
 *  \file   IfThenElse.cpp
 *  \brief  Implementation of the class IfThenElse.
 *  \author Christian Gagne
 *  \author Marc Parizeau
 *  $Revision: 1.10 $
 *  $Date: 2005/10/04 09:32:56 $
 */

#include "beagle/GP.hpp"
#include "IfThenElse.hpp"

#include <cmath>
#include <fstream>

using namespace Beagle;


/*!
 *  \brief Construct a new IfThenElse primitive.
 */
IfThenElse::IfThenElse() :
  Beagle::GP::Primitive(3, "IF")
{ }


#ifdef BEAGLE_HAVE_RTTI

/*!
 *  \brief Return the type tag needed as input for the primitive (0=Bool, {1,2}=Double).
 *  \param inN Index of the argument to get the tag.
 *  \param ioContext Evolutionary context.
 *  \return RTTI type_info tagging the data type.
 *  \throw AssertException If the index inN given is > to 2.
 */
const std::type_info* IfThenElse::getArgType(unsigned int inN, Beagle::GP::Context& ioContext) const
{
  Beagle_AssertM(inN < 3);
  if(inN == 0) return &typeid(Bool);
  return &typeid(Double);
}


/*!
 *  \brief Return the string tagging the Double type returned but the primitive IfThenElse.
 *  \param ioContext Evolutionary context.
 *  \return RTTI type_info tagging the Double type returned.
 */
const std::type_info* IfThenElse::getReturnType(Beagle::GP::Context& ioContext) const
{
  return &typeid(Double);
}

#endif // BEAGLE_HAVE_RTTI


/*!
 *  \brief Depending the first argument value, return the 2nd (true) or the 3rd (false).
 *  \param outDatum Result of the comparison.
 *  \param ioContext Evolutionary context.
 */
void IfThenElse::execute(GP::Datum& outDatum, GP::Context& ioContext)
{
  Bool lCondition;
  get1stArgument(lCondition, ioContext);
  if(lCondition == true) get2ndArgument(outDatum, ioContext);
  else get3rdArgument(outDatum, ioContext);
}