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channel.cpp
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1 /* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */
2 /*
3  * Main authors:
4  * Christian Schulte <schulte@gecode.org>
5  * Vincent Barichard <Vincent.Barichard@univ-angers.fr>
6  *
7  * Copyright:
8  * Christian Schulte, 2006
9  * Vincent Barichard, 2012
10  *
11  * Last modified:
12  * $Date: 2016-06-27 20:51:18 +0200 (Mon, 27 Jun 2016) $ by $Author: schulte $
13  * $Revision: 15132 $
14  *
15  * This file is part of Gecode, the generic constraint
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39 
40 #include "test/float.hh"
41 
42 #include <gecode/minimodel.hh>
43 
44 namespace Test { namespace Float {
45 
47  namespace Channel {
48 
50  class Int : public Test {
51  public:
54  : Test("Channel::Int",2,-1,2,st,CPLT_ASSIGNMENT,false) {}
56  virtual MaybeType solution(const Assignment& x) const {
57  Gecode::FloatNum tmp;
58  return (((modf(x[0].min(),&tmp)==0) ||
59  (modf(x[0].max(),&tmp)==0))
60  && (x[0]==x[1])) ? MT_TRUE : MT_FALSE;
61  }
63  virtual void post(Gecode::Space& home, Gecode::FloatVarArray& x) {
64  using namespace Gecode;
65  IntVar iv(home,-1000,1000);
66  channel(home, x[0], iv);
67  channel(home, iv, x[1]);
68  }
69  };
70 
72  class Bool : public Test {
73  public:
76  : Test("Channel::Bool",2,0,1,st,CPLT_ASSIGNMENT,false) {}
78  virtual MaybeType solution(const Assignment& x) const {
79  Gecode::FloatNum tmp;
80  return (((modf(x[0].min(),&tmp)==0) ||
81  (modf(x[0].max(),&tmp)==0))
82  && (x[0]==x[1])) ? MT_TRUE : MT_FALSE;
83  }
85  virtual void post(Gecode::Space& home, Gecode::FloatVarArray& x) {
86  using namespace Gecode;
87  BoolVar bv(home,0,1);
88  channel(home, x[0], bv);
89  channel(home, bv, x[1]);
90  }
91  };
92 
95 
96  Int ci(step1);
97  Bool cb(step2);
99 
100  }
101 }}
102 
103 // STATISTICS: test-float
104 
const FloatNum max
Largest allowed float value.
Definition: float.hh:848
Gecode::FloatNum step2
Definition: channel.cpp:94
void channel(Home home, const SetVarArgs &x, const SetVarArgs &y)
Definition: channel.cpp:76
virtual MaybeType solution(const Assignment &x) const
Check whether x is solution.
Definition: channel.cpp:56
Gecode::FloatNum step1
Definition: channel.cpp:93
Float variable array.
Definition: float.hh:1031
Computation spaces.
Definition: core.hpp:1748
Int(Gecode::FloatNum st)
Construct and register test.
Definition: channel.cpp:53
const FloatNum min
Smallest allowed float value.
Definition: float.hh:850
virtual void post(Gecode::Space &home, Gecode::FloatVarArray &x)
Post constraint on x.
Definition: channel.cpp:63
virtual MaybeType solution(const Assignment &x) const
Check whether x is solution.
Definition: channel.cpp:78
Boolean integer variables.
Definition: int.hh:494
General test support.
Definition: afc.cpp:43
Node * x
Pointer to corresponding Boolean expression node.
Definition: bool-expr.cpp:253
Test channel between float and integer
Definition: channel.cpp:50
Integer variables.
Definition: int.hh:353
MaybeType
Type for comparisons and solutions.
Definition: float.hh:55
virtual void post(Gecode::Space &home, Gecode::FloatVarArray &x)
Post constraint on x.
Definition: channel.cpp:85
Gecode toplevel namespace
double FloatNum
Floating point number base type.
Definition: float.hh:110
Base class for assignments
Definition: float.hh:84
Bool(Gecode::FloatNum st)
Construct and register test.
Definition: channel.cpp:75
Test channel between float and Boolean
Definition: channel.cpp:72