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dekker.one
1/* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */
2/*
3 * Main authors:
4 * Jip J. Dekker <jip.dekker@monash.edu>
5 *
6 * Copyright:
7 * Jip J. Dekker, 2018
8 *
9 * This file is part of Gecode, the generic constraint
10 * development environment:
11 * http://www.gecode.org
12 *
13 * Permission is hereby granted, free of charge, to any person obtaining
14 * a copy of this software and associated documentation files (the
15 * "Software"), to deal in the Software without restriction, including
16 * without limitation the rights to use, copy, modify, merge, publish,
17 * distribute, sublicense, and/or sell copies of the Software, and to
18 * permit persons to whom the Software is furnished to do so, subject to
19 * the following conditions:
20 *
21 * The above copyright notice and this permission notice shall be
22 * included in all copies or substantial portions of the Software.
23 *
24 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
25 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
26 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
27 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
28 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
29 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
30 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
31 *
32 */
33
34#ifndef __FLATZINC_LASTVAL_HH__
35#define __FLATZINC_LASTVAL_HH__
36
37#include <gecode/int.hh>
38#include <memory>
39using namespace Gecode::Int;
40
41namespace Gecode { namespace FlatZinc {
42
43 class LastVal : public UnaryPropagator<IntView, PC_INT_VAL> {
44 protected:
45 using UnaryPropagator<IntView, PC_INT_VAL>::x0;
46 std::shared_ptr<int> s;
47
48 /// Constructor for cloning \a p
49 LastVal(Space& home, LastVal& p);
50 /// Constructor for posting
51 LastVal(Home home, Int::IntView x0, std::shared_ptr<int> s);
52 public:
53 /// Copy propagator during cloning
54 virtual Actor* copy(Space& home);
55 /// Cost function (defined as TODO)
56 virtual PropCost cost(const Space& home, const ModEventDelta& med) const;
57 /// Perform propagation
58 virtual ExecStatus propagate(Space& home, const ModEventDelta& med);
59
60 static ExecStatus post(Home home, Int::IntView x0, std::shared_ptr<int> s);
61 };
62
63}}
64
65#endif //__FLATZINC_LASTVAL_HH__