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precede.cpp
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1/* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */
2/*
3 * Main authors:
4 * Christopher Mears <Chris.Mears@monash.edu>
5 *
6 * Contributing authors:
7 * Christian Schulte <schulte@gecode.org>
8 *
9 * Copyright:
10 * Christopher Mears, 2011
11 * Christian Schulte, 2011
12 *
13 * This file is part of Gecode, the generic constraint
14 * development environment:
15 * http://www.gecode.org
16 *
17 * Permission is hereby granted, free of charge, to any person obtaining
18 * a copy of this software and associated documentation files (the
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21 * distribute, sublicense, and/or sell copies of the Software, and to
22 * permit persons to whom the Software is furnished to do so, subject to
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37
38#include "test/int.hh"
39
40namespace Test { namespace Int {
41
43 namespace Precede {
44
46 class Single : public Test {
47 private:
49 int s, t;
50 public:
52 Single(int s0, int t0)
53 : Test("Precede::Single::"+str(s0)+"<"+str(t0),8,1,4),
54 s(s0), t(t0) {}
55
56 virtual bool solution(const Assignment& x) const {
57 int n = x.size();
58 for (int i = 0 ; i < n ; i++) {
59 if (x[i] == t)
60 return false;
61 if (x[i] == s)
62 return true;
63 }
64 return true;
65 }
66
67 virtual void post(Gecode::Space& home, Gecode::IntVarArray& x) {
68 Gecode::precede(home, x, s, t);
69 }
70 };
71
73 class Multi : public Test {
74 private:
77 public:
80 : Test("Precede::Multi::"+str(c0),6,1,5), c(c0) {
82 }
83
84 virtual bool solution(const Assignment& x) const {
85 for (int j=0; j<c.size()-1; j++)
86 for (int i=0; i<x.size(); i++) {
87 if (x[i] == c[j+1])
88 return false;
89 if (x[i] == c[j])
90 break;
91 }
92 return true;
93 }
94
95 virtual void post(Gecode::Space& home, Gecode::IntVarArray& x) {
96 Gecode::precede(home, x, c);
97 }
98 };
99
100 Single _a(2, 3);
101 Single _b(1, 4);
102
106
107 }
108
109}}
110
111// STATISTICS: test-int
Passing integer arguments.
Definition int.hh:634
Integer variable array.
Definition int.hh:772
Computation spaces.
Definition core.hpp:1744
Base class for assignments
Definition int.hh:59
Test for multiple value precedence constraint
Definition precede.cpp:73
virtual void post(Gecode::Space &home, Gecode::IntVarArray &x)
Post constraint on x.
Definition precede.cpp:95
Multi(const Gecode::IntArgs &c0)
Create and register test.
Definition precede.cpp:79
virtual bool solution(const Assignment &x) const
Test whether x is solution
Definition precede.cpp:84
Test for single value precedence constraint
Definition precede.cpp:46
virtual void post(Gecode::Space &home, Gecode::IntVarArray &x)
Post constraint on x.
Definition precede.cpp:67
Single(int s0, int t0)
Create and register test.
Definition precede.cpp:52
virtual bool solution(const Assignment &x) const
Test whether x is solution
Definition precede.cpp:56
static std::string str(Gecode::IntPropLevel ipl)
Map integer propagation level to string.
Definition int.hpp:209
ConTestLevel contest
Whether to test for certain consistency.
Definition int.hh:236
void precede(Home home, const IntVarArgs &x, int s, int t, IntPropLevel=IPL_DEF)
Post propagator that s precedes t in x.
Definition precede.cpp:43
Tests for value precedence constraints
Definition precede.cpp:43
Single _b(1, 4)
Multi _e(Gecode::IntArgs({4, 2, 3, 1}))
Single _a(2, 3)
Multi _c(Gecode::IntArgs({1, 2, 3}))
Multi _d(Gecode::IntArgs({3, 2, 1}))
Testing finite domain integers.
Definition int.cpp:40
@ CTL_NONE
No consistency-test.
Definition int.hh:140
General test support.
Definition afc.cpp:39