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val.hpp

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00001 /* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */
00002 /*
00003  *  Main authors:
00004  *     Christian Schulte <schulte@gecode.org>
00005  *
00006  *  Copyright:
00007  *     Christian Schulte, 2008
00008  *
00009  *  This file is part of Gecode, the generic constraint
00010  *  development environment:
00011  *     http://www.gecode.org
00012  *
00013  *  Permission is hereby granted, free of charge, to any person obtaining
00014  *  a copy of this software and associated documentation files (the
00015  *  "Software"), to deal in the Software without restriction, including
00016  *  without limitation the rights to use, copy, modify, merge, publish,
00017  *  distribute, sublicense, and/or sell copies of the Software, and to
00018  *  permit persons to whom the Software is furnished to do so, subject to
00019  *  the following conditions:
00020  *
00021  *  The above copyright notice and this permission notice shall be
00022  *  included in all copies or substantial portions of the Software.
00023  *
00024  *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
00025  *  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
00026  *  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
00027  *  NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
00028  *  LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
00029  *  OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
00030  *  WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
00031  *
00032  */
00033 
00034 namespace Gecode {
00035 
00040   template<class Var>
00041   class ValBranch {
00042   public:
00044     typedef typename BranchTraits<Var>::Val BranchVal;
00046     typedef typename BranchTraits<Var>::Commit BranchCommit;
00047   protected:
00049     Rnd r;
00051     BranchVal vf;
00053     BranchCommit cf;
00054   public:
00056     ValBranch(void);
00058     ValBranch(Rnd r);
00060     ValBranch(BranchVal v, BranchCommit c);
00062     Rnd rnd(void) const;
00064     BranchVal val(void) const;
00066     BranchCommit commit(void) const;
00067   };
00068 
00069 
00070   template<class Var>
00071   inline
00072   ValBranch<Var>::ValBranch(void)
00073     : vf(nullptr), cf(nullptr) {}
00074 
00075   template<class Var>
00076   inline
00077   ValBranch<Var>::ValBranch(Rnd r0)
00078     : r(r0), vf(nullptr), cf(nullptr) {
00079     if (!r)
00080       throw UninitializedRnd("ValBranch::ValBranch");
00081   }
00082 
00083   template<class Var>
00084   inline
00085   ValBranch<Var>::ValBranch(BranchVal v, BranchCommit c)
00086     : vf(v), cf(c) {}
00087 
00088   template<class Var>
00089   inline Rnd
00090   ValBranch<Var>::rnd(void) const {
00091     return r;
00092   }
00093 
00094   template<class Var>
00095   inline typename ValBranch<Var>::BranchVal
00096   ValBranch<Var>::val(void) const {
00097     return vf;
00098   }
00099 
00100   template<class Var>
00101   inline typename ValBranch<Var>::BranchCommit
00102   ValBranch<Var>::commit(void) const {
00103     return cf;
00104   }
00105 
00106 }
00107 
00108 // STATISTICS: kernel-branch