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precede.cpp

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00001 /* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */
00002 /*
00003  *  Main authors:
00004  *     Christopher Mears <Chris.Mears@monash.edu>
00005  *
00006  *  Contributing authors:
00007  *     Christian Schulte <schulte@gecode.org>
00008  *
00009  *  Copyright:
00010  *     Christopher Mears, 2011
00011  *     Christian Schulte, 2011
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 #include <gecode/int/precede.hh>
00039 
00040 namespace Gecode {
00041 
00042   void
00043   precede(Home home, const IntVarArgs& x, int s, int t, IntPropLevel) {
00044     using namespace Int;
00045     Limits::check(s,"Int::precede");
00046     Limits::check(t,"Int::precede");
00047     GECODE_POST;
00048 
00049     ViewArray<IntView> y(home, x);
00050     GECODE_ES_FAIL(Precede::Single<IntView>::post(home, y, s, t));
00051   }
00052 
00053   void
00054   precede(Home home, const IntVarArgs& x, const IntArgs& c, IntPropLevel) {
00055     using namespace Int;
00056     if (c.size() < 2)
00057       return;
00058     for (int i=c.size(); i--; )
00059       Limits::check(c[i],"Int::precede");
00060     GECODE_POST;
00061 
00062     for (int i=c.size()-1; i--; ) {
00063       ViewArray<IntView> y(home, x);
00064       GECODE_ES_FAIL(Precede::Single<IntView>::post(home, y, c[i], c[i+1]));
00065     }
00066   }
00067 
00068 }
00069 
00070 // STATISTICS: int-post
00071