link-single.hpp
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/* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */
/*
* Main authors:
* Christian Schulte <schulte@gecode.org>
*
* Copyright:
* Christian Schulte, 2007
*
* This file is part of Gecode, the generic constraint
* development environment:
* http://www.gecode.org
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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namespace Gecode { namespace Int { namespace Channel {
forceinline
LinkSingle::LinkSingle(Home home, BoolView x0, IntView x1)
: MixBinaryPropagator<BoolView,PC_BOOL_VAL,IntView,PC_INT_VAL>
(home,x0,x1) {}
forceinline ExecStatus
LinkSingle::post(Home home, BoolView x0, IntView x1) {
if (x1.assigned()) {
switch (x1.val()) {
case 0:
GECODE_ME_CHECK(x0.zero(home)); break;
case 1:
GECODE_ME_CHECK(x0.one(home)); break;
default:
return ES_FAILED;
}
} else if (x0.zero()) {
GECODE_ME_CHECK(x1.eq(home,0));
} else if (x0.one()) {
GECODE_ME_CHECK(x1.eq(home,1));
} else {
GECODE_ME_CHECK(x1.gq(home,0));
GECODE_ME_CHECK(x1.lq(home,1));
(void) new (home) LinkSingle(home,x0,x1);
}
return ES_OK;
}
}}}
// STATISTICS: int-prop
Gecode::Home
Home class for posting propagators
Definition core.hpp:856
Gecode::Int::BoolView
Boolean view for Boolean variables.
Definition view.hpp:1380
Gecode::Int::Channel::LinkSingle::post
static ExecStatus post(Home home, BoolView x0, IntView x1)
Post propagator for .
Definition link-single.hpp:42
Gecode::Int::IntView
Integer view for integer variables.
Definition view.hpp:129
Gecode::MixBinaryPropagator< BoolView, PC_BOOL_VAL, IntView, PC_INT_VAL >::x1
IntView x1
Definition pattern.hpp:209
Gecode::MixBinaryPropagator< BoolView, PC_BOOL_VAL, IntView, PC_INT_VAL >::x0
BoolView x0
Definition pattern.hpp:207
GECODE_ME_CHECK
#define GECODE_ME_CHECK(me)
Check whether modification event me is failed, and forward failure.
Definition macros.hpp:52
Gecode::Int::Channel
Channel propagators
Gecode::Int
Finite domain integers.
Gecode::Int::PC_INT_VAL
const Gecode::PropCond PC_INT_VAL
Propagate when a view becomes assigned (single value).
Definition var-type.hpp:82
Gecode::Int::PC_BOOL_VAL
const Gecode::PropCond PC_BOOL_VAL
Propagate when a view becomes assigned (single value).
Definition var-type.hpp:126
Gecode
Gecode toplevel namespace
Gecode::ExecStatus
ExecStatus
Definition core.hpp:472
Gecode::ES_OK
@ ES_OK
Execution is okay.
Definition core.hpp:476
Gecode::ES_FAILED
@ ES_FAILED
Execution has resulted in failure.
Definition core.hpp:474
forceinline
#define forceinline
Definition config.hpp:187