text: /* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */
  /*
   *  Main authors:
   *     Christian Schulte <schulte@gecode.org>
   *
   *  Copyright:
   *     Christian Schulte, 2012
   *
   *  Last modified:
   *     $Date: 2013-02-08 16:47:00 +0100 (fr, 08 feb 2013) $ by $Author: schulte $
   *     $Revision: 13278 $
   *
   *  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,
   *  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
   *  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
   *  NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
   *  LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
   *  OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
   *  WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
   *
   */
  
  namespace Gecode {
  
    /// Combine variable selection criteria for tie-breaking
    template<class VarBranch>
    class TieBreak {
    public:
      /// Branching criteria to try in order
      VarBranch a, b, c, d;
      /// Initialize with variable selection criteria
      TieBreak(VarBranch a0 = VarBranch(),
               VarBranch b0 = VarBranch(),
               VarBranch c0 = VarBranch(),
               VarBranch d0 = VarBranch());
    };
  
    /** 
     * \defgroup TaskModelBranchTieBreak Tie-breaking for variable selection
     * 
     * \ingroup TaskModelBranch
     */
    //@{
    /// Combine variable selection criteria \a a and \a b for tie-breaking
    template<class VarBranch>
    TieBreak<VarBranch>
    tiebreak(VarBranch a, VarBranch b);
    /// Combine variable selection criteria \a a, \a b, and \a c for tie-breaking
    template<class VarBranch>
    TieBreak<VarBranch>
    tiebreak(VarBranch a, VarBranch b, VarBranch c);
    /// Combine variable selection criteria \a a, \a b, \a c, and \a d for tie-breaking
    template<class VarBranch>
    TieBreak<VarBranch>
    tiebreak(VarBranch a, VarBranch b, VarBranch c, VarBranch d);
    //@}
  
  
    template<class VarBranch>
    forceinline
    TieBreak<VarBranch>::TieBreak(VarBranch a0,
                                  VarBranch b0,
                                  VarBranch c0,
                                  VarBranch d0)
      : a(a0), b(b0), c(c0), d(d0) {}
  
    template<class VarBranch>
    forceinline TieBreak<VarBranch>
    tiebreak(VarBranch a, VarBranch b) {
      TieBreak<VarBranch> ab(a,b);
      return ab;
    }
  
    template<class VarBranch>
    forceinline TieBreak<VarBranch>
    tiebreak(VarBranch a, VarBranch b, VarBranch c) {
      TieBreak<VarBranch> abc(a,b,c);
      return abc;
    }
  
    template<class VarBranch>
    forceinline TieBreak<VarBranch>
    tiebreak(VarBranch a, VarBranch b, VarBranch c, VarBranch d) {
      TieBreak<VarBranch> abcd(a,b,c,d);
      return abcd;
    }
  
  }
  
  // STATISTICS: kernel-branch
  