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iter-prune-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, 2011
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 Int { namespace ViewValGraph {
00035 
00036   template<class View>
00037   forceinline
00038   IterPruneVal<View>::IterPruneVal(ViewNode<View>* y)
00039     : x(y), e(y->val_edges()) {
00040     while ((e != NULL) && e->used(x))
00041       e = e->next_edge();
00042   }
00043   template<class View>
00044   forceinline bool
00045   IterPruneVal<View>::operator ()(void) const {
00046     return e != NULL;
00047   }
00048   template<class View>
00049   forceinline void
00050   IterPruneVal<View>::operator ++(void) {
00051     assert(!e->used(x));
00052     do {
00053       e = e->next_edge();
00054     } while ((e != NULL) && e->used(x));
00055   }
00056   template<class View>
00057   forceinline int
00058   IterPruneVal<View>::val(void) const {
00059     assert(!e->used(x));
00060     return e->val(x)->val();
00061   }
00062 
00063 }}}
00064 
00065 // STATISTICS: int-prop
00066