branch.hh

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/* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */
/*
 *  Main authors:
 *     Christian Schulte <schulte@gecode.org>
 *
 *  Copyright:
 *     Christian Schulte, 2002
 *
 *  Last modified:
 *     $Date: 2011-05-11 20:44:17 +1000 (Wed, 11 May 2011) $ by $Author: tack $
 *     $Revision: 12001 $
 *
 *  This file is part of Gecode, the generic constraint
 *  development environment:
 *     http://www.gecode.org
 *
 *  Permission is hereby granted, free of charge, to any person obtaining
 *  a copy of this software and associated documentation files (the
 *  "Software"), to deal in the Software without restriction, including
 *  without limitation the rights to use, copy, modify, merge, publish,
 *  distribute, sublicense, and/or sell copies of the Software, and to
 *  permit persons to whom the Software is furnished to do so, subject to
 *  the following conditions:
 *
 *  The above copyright notice and this permission notice shall be
 *  included in all copies or substantial portions of the Software.
 *
 *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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 *  LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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 */

#ifndef __GECODE_INT_BRANCH_HH__
#define __GECODE_INT_BRANCH_HH__

#include <gecode/int.hh>

namespace Gecode { namespace Int { namespace Branch {

  /*
   * Value selection classes
   *
   */

  template<class View>
  class ValMin : public ValSelBase<View,int> {
  public:
    ValMin(void);
    ValMin(Space& home, const ValBranchOptions& vbo);
    int val(Space& home, View x) const;
    ModEvent tell(Space& home, unsigned int a, View x, int n);
  };

  template<class View>
  class ValMed : public ValSelBase<View,int> {
  public:
    ValMed(void);
    ValMed(Space& home, const ValBranchOptions& vbo);
    int val(Space& home, View x) const;
    ModEvent tell(Space& home, unsigned int a, View x, int n);
  };

  template<class _View>
  class ValRnd {
  protected:
    ArchivedRandomGenerator r;
  public:
    typedef _View View;
    typedef int Val;
    typedef ArchivedRandomGenerator Choice;
    static const unsigned int alternatives = 2;
    ValRnd(void);
    ValRnd(Space& home, const ValBranchOptions& vbo);
    int val(Space& home, _View x);
    ModEvent tell(Space& home, unsigned int a, _View x, int n);
    Choice choice(Space& home);
    Choice choice(const Space& home, Archive& e);
    void commit(Space& home, const Choice& c, unsigned a);
    void update(Space& home, bool share, ValRnd& vs);
    void dispose(Space& home);
  };

  template<class View>
  class ValSplitMin : public ValSelBase<View,int> {
  public:
    ValSplitMin(void);
    ValSplitMin(Space& home, const ValBranchOptions& vbo);
    int val(Space& home, View x) const;
    ModEvent tell(Space& home, unsigned int a, View x, int n);
  };


  template<class View>
  class ValRangeMin : public ValSelBase<View,int> {
  public:
    ValRangeMin(void);
    ValRangeMin(Space& home, const ValBranchOptions& vbo);
    int val(Space& home, View x) const;
    ModEvent tell(Space& home, unsigned int a, View x, int n);
  };


  class NoValue {};

}}}

namespace Gecode {
  forceinline Archive&
  operator >>(Archive& e, Gecode::Int::Branch::NoValue&) {
    return e;
  }
  forceinline Archive&
  operator <<(Archive& e, const Gecode::Int::Branch::NoValue&) {
    return e;
  }
}

namespace Gecode { namespace Int { namespace Branch {

  template<class View>
  class ValZeroOne : public ValSelBase<View,NoValue> {
  public:
    ValZeroOne(void);
    ValZeroOne(Space& home, const ValBranchOptions& vbo);
    NoValue val(Space& home, View x) const;
    ModEvent tell(Space& home, unsigned int a, View x, NoValue n);
  };


  template<class ViewSel, class View>
  class ViewValuesBrancher : public ViewBrancher<ViewSel> {
  protected:
    using ViewBrancher<ViewSel>::x;
    using ViewBrancher<ViewSel>::viewsel;
    ViewValuesBrancher(Space& home, bool share, ViewValuesBrancher& b);
    ViewValuesBrancher(Home home, ViewArray<typename ViewSel::View>& x,
                       ViewSel& vi_s, BranchFilter bf);
  public:
    virtual const Choice* choice(Space& home);
    virtual const Choice* choice(const Space& home, Archive& e);
    virtual ExecStatus commit(Space& home, const Choice& c, unsigned int a);
    virtual Actor* copy(Space& home, bool share);
    static void post(Home home, ViewArray<typename ViewSel::View>& x,
                     ViewSel& vi_s, BranchFilter bf=NULL);
  };


  template<class View>
  class AssignValMin : public ValMin<View> {
  public:
    static const unsigned int alternatives = 1;
    AssignValMin(void);
    AssignValMin(Space& home, const ValBranchOptions& vbo);
  };

  template<class View>
  class AssignValMed : public ValMed<View> {
  public:
    static const unsigned int alternatives = 1;
    AssignValMed(void);
    AssignValMed(Space& home, const ValBranchOptions& vbo);
  };

  template<class View>
  class AssignValRnd : public ValRnd<View> {
  public:
    static const unsigned int alternatives = 1;
    AssignValRnd(void);
    AssignValRnd(Space& home, const ValBranchOptions& vbo);
  };

  template<class View>
  class AssignValZero : public ValZeroOne<View> {
  public:
    static const unsigned int alternatives = 1;
    AssignValZero(void);
    AssignValZero(Space& home, const ValBranchOptions& vbo);
  };

  /*
   * Variable selection classes
   *
   */

  class ByMinMin : public ViewSelBase<IntView> {
  protected:
    int min;
  public:
    ByMinMin(void);
    ByMinMin(Space& home, const VarBranchOptions& vbo);
    ViewSelStatus init(Space& home, IntView x);
    ViewSelStatus select(Space& home, IntView x);
  };

  class ByMinMax : public ViewSelBase<IntView> {
  protected:
    int min;
  public:
    ByMinMax(void);
    ByMinMax(Space& home, const VarBranchOptions& vbo);
    ViewSelStatus init(Space& home, IntView x);
    ViewSelStatus select(Space& home, IntView x);
  };

  class ByMaxMin : public ViewSelBase<IntView> {
  protected:
    int max;
  public:
    ByMaxMin(void);
    ByMaxMin(Space& home, const VarBranchOptions& vbo);
    ViewSelStatus init(Space& home, IntView x);
    ViewSelStatus select(Space& home, IntView x);
  };

  class ByMaxMax : public ViewSelBase<IntView> {
  protected:
    int max;
  public:
    ByMaxMax(void);
    ByMaxMax(Space& home, const VarBranchOptions& vbo);
    ViewSelStatus init(Space& home, IntView x);
    ViewSelStatus select(Space& home, IntView x);
  };

  class BySizeMin : public ViewSelBase<IntView> {
  protected:
    unsigned int size;
  public:
    BySizeMin(void);
    BySizeMin(Space& home, const VarBranchOptions& vbo);
    ViewSelStatus init(Space& home, IntView x);
    ViewSelStatus select(Space& home, IntView x);
  };

  class BySizeMax : public ViewSelBase<IntView> {
  protected:
    unsigned int size;
  public:
    BySizeMax(void);
    BySizeMax(Space& home, const VarBranchOptions& vbo);
    ViewSelStatus init(Space& home, IntView x);
    ViewSelStatus select(Space& home, IntView x);
  };

  class BySizeDegreeMin : public ViewSelBase<IntView> {
  protected:
    double sizedegree;
  public:
    BySizeDegreeMin(void);
    BySizeDegreeMin(Space& home, const VarBranchOptions& vbo);
    ViewSelStatus init(Space& home, IntView x);
    ViewSelStatus select(Space& home, IntView x);
  };

  class BySizeDegreeMax : public ViewSelBase<IntView> {
  protected:
    double sizedegree;
  public:
    BySizeDegreeMax(void);
    BySizeDegreeMax(Space& home, const VarBranchOptions& vbo);
    ViewSelStatus init(Space& home, IntView x);
    ViewSelStatus select(Space& home, IntView x);
  };

  class BySizeAfcMin : public ViewSelBase<IntView> {
  protected:
    double sizeafc;
  public:
    BySizeAfcMin(void);
    BySizeAfcMin(Space& home, const VarBranchOptions& vbo);
    ViewSelStatus init(Space& home, IntView x);
    ViewSelStatus select(Space& home, IntView x);
  };

  class BySizeAfcMax : public ViewSelBase<IntView> {
  protected:
    double sizeafc;
  public:
    BySizeAfcMax(void);
    BySizeAfcMax(Space& home, const VarBranchOptions& vbo);
    ViewSelStatus init(Space& home, IntView x);
    ViewSelStatus select(Space& home, IntView x);
  };

  class ByRegretMinMin : public ViewSelBase<IntView> {
  protected:
    unsigned int regret;
  public:
    ByRegretMinMin(void);
    ByRegretMinMin(Space& home, const VarBranchOptions& vbo);
    ViewSelStatus init(Space& home, IntView x);
    ViewSelStatus select(Space& home, IntView x);
  };

  class ByRegretMinMax : public ViewSelBase<IntView> {
  protected:
    unsigned int regret;
  public:
    ByRegretMinMax(void);
    ByRegretMinMax(Space& home, const VarBranchOptions& vbo);
    ViewSelStatus init(Space& home, IntView x);
    ViewSelStatus select(Space& home, IntView x);
  };

  class ByRegretMaxMin : public ViewSelBase<IntView> {
  protected:
    unsigned int regret;
  public:
    ByRegretMaxMin(void);
    ByRegretMaxMin(Space& home, const VarBranchOptions& vbo);
    ViewSelStatus init(Space& home, IntView x);
    ViewSelStatus select(Space& home, IntView x);
  };

  class ByRegretMaxMax : public ViewSelBase<IntView> {
  protected:
    unsigned int regret;
  public:
    ByRegretMaxMax(void);
    ByRegretMaxMax(Space& home, const VarBranchOptions& vbo);
    ViewSelStatus init(Space& home, IntView x);
    ViewSelStatus select(Space& home, IntView x);
  };

}}}

#include <gecode/int/branch/select-val.hpp>
#include <gecode/int/branch/select-values.hpp>
#include <gecode/int/branch/select-view.hpp>
#include <gecode/int/branch/post-val-int.hpp>
#include <gecode/int/branch/post-val-bool.hpp>

#endif

// STATISTICS: int-branch