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values-unique.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, 2007
00008  *
00009  *  Last modified:
00010  *     $Date: 2009-09-08 21:10:29 +0200 (Tue, 08 Sep 2009) $ by $Author: schulte $
00011  *     $Revision: 9692 $
00012  *
00013  *  This file is part of Gecode, the generic constraint
00014  *  development environment:
00015  *     http://www.gecode.org
00016  *
00017  *  Permission is hereby granted, free of charge, to any person obtaining
00018  *  a copy of this software and associated documentation files (the
00019  *  "Software"), to deal in the Software without restriction, including
00020  *  without limitation the rights to use, copy, modify, merge, publish,
00021  *  distribute, sublicense, and/or sell copies of the Software, and to
00022  *  permit persons to whom the Software is furnished to do so, subject to
00023  *  the following conditions:
00024  *
00025  *  The above copyright notice and this permission notice shall be
00026  *  included in all copies or substantial portions of the Software.
00027  *
00028  *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
00029  *  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
00030  *  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
00031  *  NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
00032  *  LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
00033  *  OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
00034  *  WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
00035  *
00036  */
00037 
00038 namespace Gecode { namespace Iter { namespace Values {
00039 
00049   template<class I>
00050   class Unique {
00051   private:
00053     IsValueIter<I> _checkI;
00054   protected:
00056     I i;
00057   public:
00059 
00060 
00061     Unique(void);
00063     Unique(I& i);
00065     void init(I& i);
00067 
00069 
00070 
00071     bool operator ()(void) const;
00073     void operator ++(void);
00075 
00077 
00078 
00079     int val(void) const;
00081   };
00082 
00083   template<class I>
00084   forceinline
00085   Unique<I>::Unique(void) {}
00086 
00087   template<class I>
00088   forceinline
00089   Unique<I>::Unique(I& i0)
00090     : i(i0) {}
00091 
00092   template<class I>
00093   forceinline void
00094   Unique<I>::init(I& i0) {
00095     i = i0;
00096   }
00097 
00098   template<class I>
00099   forceinline void
00100   Unique<I>::operator ++(void) {
00101     int n=i;
00102     do {
00103       ++i;
00104     } while (i() && (i.val() == n));
00105   }
00106   template<class I>
00107   forceinline bool
00108   Unique<I>::operator ()(void) const {
00109     return i();
00110   }
00111 
00112   template<class I>
00113   forceinline int
00114   Unique<I>::val(void) const {
00115     return i.val();
00116   }
00117 
00118 }}}
00119 
00120 // STATISTICS: iter-any
00121