var.hpp

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/* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */
/*
 *  Main authors:
 *     Christian Schulte <schulte@gecode.org>
 *
 *  Copyright:
 *     Christian Schulte, 2012
 *
 *  This file is part of Gecode, the generic constraint
 *  development environment:
 *     http://www.gecode.org
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#include <functional>

namespace Gecode {

  typedef std::function<double(const Space& home, double w, double b)>
    BranchTbl;

  template<class Var>
  class VarBranch {
  public:
    typedef typename BranchTraits<Var>::Merit MeritFunction;
  protected:
    BranchTbl _tbl;
    Rnd _rnd;
    double _decay;
    AFC _afc;
    Action _act;
    CHB _chb;
    MeritFunction _mf;
  public:
    VarBranch(void);
    VarBranch(BranchTbl t);
    VarBranch(Rnd r);
    VarBranch(double d, BranchTbl t);
    VarBranch(AFC a, BranchTbl t);
    VarBranch(Action a, BranchTbl t);
    VarBranch(CHB c, BranchTbl t);
    VarBranch(MeritFunction f, BranchTbl t);
    BranchTbl tbl(void) const;
    Rnd rnd(void) const;
    double decay(void) const;
    AFC afc(void) const;
    void afc(AFC a);
    Action action(void) const;
    void action(Action a);
    CHB chb(void) const;
    void chb(CHB chb);
    MeritFunction merit(void) const;
  };

  // Variable branching
  template<class Var>
  inline
  VarBranch<Var>::VarBranch(void)
    : _tbl(nullptr), _decay(1.0) {}

  template<class Var>
  inline
  VarBranch<Var>::VarBranch(BranchTbl t)
    : _tbl(t), _decay(1.0) {}

  template<class Var>
  inline
  VarBranch<Var>::VarBranch(double d, BranchTbl t)
    : _tbl(t), _decay(d) {}

  template<class Var>
  inline
  VarBranch<Var>::VarBranch(AFC a, BranchTbl t)
    : _tbl(t), _decay(1.0), _afc(a) {
    if (!_afc)
      throw UninitializedAFC("VarBranch<Var>::VarBranch");
  }

  template<class Var>
  inline
  VarBranch<Var>::VarBranch(Action a, BranchTbl t)
    : _tbl(t), _decay(1.0), _act(a) {
    if (!_act)
      throw UninitializedAction("VarBranch<Var>::VarBranch");
  }

  template<class Var>
  inline
  VarBranch<Var>::VarBranch(CHB c, BranchTbl t)
    : _tbl(t), _decay(1.0), _chb(c) {
    if (!_chb)
      throw UninitializedCHB("VarBranch<Var>::VarBranch");
  }

  template<class Var>
  inline
  VarBranch<Var>::VarBranch(Rnd r)
    : _tbl(nullptr), _rnd(r), _decay(1.0) {
    if (!_rnd)
      throw UninitializedRnd("VarBranch<Var>::VarBranch");
  }

  template<class Var>
  inline
  VarBranch<Var>::VarBranch(MeritFunction f, BranchTbl t)
    : _tbl(t), _decay(1.0), _mf(f) {}

  template<class Var>
  inline BranchTbl
  VarBranch<Var>::tbl(void) const {
    return _tbl;
  }

  template<class Var>
  inline Rnd
  VarBranch<Var>::rnd(void) const {
    return _rnd;
  }

  template<class Var>
  inline double
  VarBranch<Var>::decay(void) const {
    return _decay;
  }

  template<class Var>
  inline AFC
  VarBranch<Var>::afc(void) const {
    return _afc;
  }

  template<class Var>
  inline void
  VarBranch<Var>::afc(AFC a) {
    _afc=a;
  }

  template<class Var>
  inline Action
  VarBranch<Var>::action(void) const {
    return _act;
  }

  template<class Var>
  inline void
  VarBranch<Var>::action(Action a) {
    _act=a;
  }

  template<class Var>
  inline CHB
  VarBranch<Var>::chb(void) const {
    return _chb;
  }

  template<class Var>
  inline void
  VarBranch<Var>::chb(CHB chb) {
    _chb=chb;
  }

  template<class Var>
  inline typename VarBranch<Var>::MeritFunction
  VarBranch<Var>::merit(void) const {
    return _mf;
  }

}

// STATISTICS: kernel-branch