Jip J. Dekker
981be2067e
git-subtree-dir: software/gecode_on_replay git-subtree-split: 8051d92b9c89e49cccfbd1c201371580d7703ab4
74 lines
2.3 KiB
C++
74 lines
2.3 KiB
C++
/* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */
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/*
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* Main authors:
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* Christian Schulte <schulte@gecode.org>
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*
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* Copyright:
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* Christian Schulte, 2007
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*
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* This file is part of Gecode, the generic constraint
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* development environment:
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* http://www.gecode.org
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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*/
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#include <gecode/int/channel.hh>
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namespace Gecode { namespace Int { namespace Channel {
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forceinline
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LinkSingle::LinkSingle(Space& home, LinkSingle& p)
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: MixBinaryPropagator<BoolView,PC_BOOL_VAL,IntView,PC_INT_VAL>
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(home,p) {}
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Actor*
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LinkSingle::copy(Space& home) {
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return new (home) LinkSingle(home,*this);
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}
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PropCost
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LinkSingle::cost(const Space&, const ModEventDelta&) const {
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return PropCost::unary(PropCost::LO);
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}
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ExecStatus
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LinkSingle::propagate(Space& home, const ModEventDelta&) {
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if (x0.zero()) {
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GECODE_ME_CHECK(x1.eq(home,0));
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} else if (x0.one()) {
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GECODE_ME_CHECK(x1.eq(home,1));
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} else {
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assert(x0.none() && x1.assigned());
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if (x1.val() == 0) {
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GECODE_ME_CHECK(x0.zero_none(home));
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} else {
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assert(x1.val() == 1);
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GECODE_ME_CHECK(x0.one_none(home));
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}
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}
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return home.ES_SUBSUMED(*this);
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}
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}}}
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// STATISTICS: int-prop
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