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values-singleton.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  *  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 { namespace Iter { namespace Values {
00035 
00042   class Singleton {
00043   protected:
00045     bool done;
00047     int v;
00048   public:
00050 
00051 
00052     Singleton(void);
00054     Singleton(int v);
00056     void init(int v);
00058 
00060 
00061 
00062     bool operator ()(void) const;
00064     void operator ++(void);
00066 
00068 
00069 
00070     int val(void) const;
00072   };
00073 
00074 
00075   forceinline
00076   Singleton::Singleton(void) {}
00077 
00078   forceinline
00079   Singleton::Singleton(int v0)
00080     : done(false), v(v0) {}
00081 
00082   forceinline void
00083   Singleton::init(int v0) {
00084     done=false; v=v0;
00085   }
00086 
00087   forceinline void
00088   Singleton::operator ++(void) {
00089     done=true;
00090   }
00091   forceinline bool
00092   Singleton::operator ()(void) const {
00093     return !done;
00094   }
00095 
00096   forceinline int
00097   Singleton::val(void) const {
00098     return v;
00099   }
00100 
00101 
00102 }}}
00103 
00104 // STATISTICS: iter-any
00105