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ranges-empty.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, 2004
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 Ranges {
00035 
00042   class Empty {
00043   public:
00045 
00046 
00047     Empty(void);
00049     void init(void);
00051 
00053 
00054 
00055     bool operator ()(void) const;
00057     void operator ++(void);
00059 
00061 
00062 
00063     int min(void) const;
00065     int max(void) const;
00067     unsigned int width(void) const;
00069   };
00070 
00071 
00072   forceinline
00073   Empty::Empty(void) {}
00074 
00075   forceinline void
00076   Empty::init(void) {}
00077 
00078   forceinline void
00079   Empty::operator ++(void) {
00080     GECODE_NEVER;
00081   }
00082 
00083   forceinline bool
00084   Empty::operator ()(void) const {
00085     return false;
00086   }
00087 
00088   forceinline int
00089   Empty::min(void) const {
00090     GECODE_NEVER;
00091     return 0;
00092   }
00093   forceinline int
00094   Empty::max(void) const {
00095     GECODE_NEVER;
00096     return 0;
00097   }
00098   forceinline unsigned int
00099   Empty::width(void) const {
00100     GECODE_NEVER;
00101     return 0;
00102   }
00103 
00104 }}}
00105 
00106 // STATISTICS: iter-any
00107