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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
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37 
38 #include "test/int.hh"
39 
40 namespace 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) {}
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  }
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) {
81  contest = CTL_NONE;
82  }
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  }
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 
103  Multi _c(Gecode::IntArgs({1,2,3}));
104  Multi _d(Gecode::IntArgs({3,2,1}));
105  Multi _e(Gecode::IntArgs({4,2,3,1}));
106 
107  }
108 
109 }}
110 
111 // STATISTICS: test-int
ConTestLevel contest
Whether to test for certain consistency.
Definition: int.hh:236
Single(int s0, int t0)
Create and register test.
Definition: precede.cpp:52
Single _a(2, 3)
virtual bool solution(const Assignment &x) const
Test whether x is solution
Definition: precede.cpp:56
No consistency-test.
Definition: int.hh:140
NodeType t
Type of node.
Definition: bool-expr.cpp:230
Multi _d(Gecode::IntArgs({3, 2, 1}))
Single _b(1, 4)
Computation spaces.
Definition: core.hpp:1742
Multi _c(Gecode::IntArgs({1, 2, 3}))
virtual void post(Gecode::Space &home, Gecode::IntVarArray &x)
Post constraint on x.
Definition: precede.cpp:67
Integer variable array.
Definition: int.hh:763
Node * x
Pointer to corresponding Boolean expression node.
Definition: bool-expr.cpp:249
Multi(const Gecode::IntArgs &c0)
Create and register test.
Definition: precede.cpp:79
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 _e(Gecode::IntArgs({4, 2, 3, 1}))
FloatNum size(void) const
Return size of float value (distance between maximum and minimum)
Definition: val.hpp:78
Base class for assignments
Definition: int.hh:59
void precede(Home home, const IntVarArgs &x, int s, int t, IntPropLevel)
Post propagator that s precedes t in x.
Definition: precede.cpp:43
General test support.
Definition: afc.cpp:39
Test for single value precedence constraint
Definition: precede.cpp:46
int n
Number of negative literals for node type.
Definition: bool-expr.cpp:234
Passing integer arguments.
Definition: int.hh:628
Gecode::IntArgs i({1, 2, 3, 4})
virtual bool solution(const Assignment &x) const
Test whether x is solution
Definition: precede.cpp:84
static std::string str(Gecode::IntPropLevel ipl)
Map integer propagation level to string.
Definition: int.hpp:209