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val-sel.hpp
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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, 2012
9  * Vincent Barichard, 2012
10  *
11  * Last modified:
12  * $Date: 2012-10-02 15:49:50 +0200 (Tue, 02 Oct 2012) $ by $Author: schulte $
13  * $Revision: 13123 $
14  *
15  * This file is part of Gecode, the generic constraint
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17  * http://www.gecode.org
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39 
40 namespace Gecode {
41 
42  forceinline Archive&
43  operator <<(Archive& e, std::pair<float,bool> pdb) {
44  return e << pdb.first << pdb.second;
45  }
46  forceinline Archive&
47  operator <<(Archive& e, std::pair<double,bool> pdb) {
48  return e << pdb.first << pdb.second;
49  }
50 
51  forceinline Archive&
52  operator >>(Archive& e, std::pair<float,bool>& pdb) {
53  return e >> pdb.first >> pdb.second;
54  }
55  forceinline Archive&
56  operator >>(Archive& e, std::pair<double,bool>& pdb) {
57  return e >> pdb.first >> pdb.second;
58  }
59 }
60 
61 namespace Gecode { namespace Float { namespace Branch {
62 
65  : ValSel<FloatView,FloatNum>(home,vb) {}
68  : ValSel<FloatView,FloatNum>(home,shared,vs) {}
70  ValSelMed::val(const Space&, FloatView x, int) {
71  return x.med();
72  }
73 
76  : ValSel<FloatView,std::pair<FloatNum,bool> >(home,vb), r(vb.rnd()) {}
79  : ValSel<FloatView,std::pair<FloatNum,bool> >(home,shared,vs) {
80  r.update(home,shared,vs.r);
81  }
82  forceinline std::pair<FloatNum,bool>
83  ValSelRnd::val(const Space&, FloatView x, int) {
84  unsigned int p = r(2U);
85  return std::pair<FloatNum,bool>(x.med(),(p == 0U));
86  }
87  forceinline bool
88  ValSelRnd::notice(void) const {
89  return true;
90  }
91  forceinline void
93  r.~Rnd();
94  }
95 
96 }}}
97 
98 // STATISTICS: float-branch
99