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val-commit.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  *
6  * Contributing authors:
7  * Vincent Barichard <Vincent.Barichard@univ-angers.fr>
8  *
9  * Copyright:
10  * Christian Schulte, 2012
11  * Vincent Barichard, 2012
12  *
13  * This file is part of Gecode, the generic constraint
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15  * http://www.gecode.org
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37 
38 namespace Gecode { namespace Float { namespace Branch {
39 
42  : ValCommit<FloatView,FloatVal>(home,vb) {}
45  : ValCommit<FloatView,FloatVal>(home,vc) {}
47  ValCommitLqGq::commit(Space& home, unsigned int a, FloatView x, int,
48  FloatNumBranch nl) {
49  // Should we try the smaller half first?
50  if ((a == 0) == nl.l) {
51  if ((x.min() == nl.n) || (x.max() == nl.n))
52  return x.eq(home,x.min());
53  else
54  return x.lq(home,nl.n);
55  } else {
56  if ((x.min() == nl.n) || (x.max() == nl.n))
57  return x.eq(home,x.max());
58  else
59  return x.gq(home,nl.n);
60  }
61  }
64  return NULL;
65  }
66  forceinline void
67  ValCommitLqGq::print(const Space&, unsigned int a, FloatView, int i,
68  FloatNumBranch nl,
69  std::ostream& o) const {
70  o << "var[" << i << "] "
71  << (((a == 0) == nl.l) ? "<=" : ">=") << "(" << nl.n << ")";
72  }
73 
74 }}}
75 
76 // STATISTICS: float-branch
77 
Node * x
Pointer to corresponding Boolean expression node.
Definition: bool-expr.cpp:249
struct Gecode::@602::NNF::@65::@67 a
For atomic nodes.
Value description class for branching.
Definition: float.hh:1462
bool l
Whether to try the lower or upper half first.
Definition: float.hh:1467
FloatNum n
The middle value for branching.
Definition: float.hh:1465
Float value type.
Definition: float.hh:334
Value commit class for less or equal or greater or equal.
Definition: branch.hh:298
NGL * ngl(Space &home, unsigned int a, FloatView x, FloatNumBranch n) const
Create no-good literal for alternative a.
Definition: val-commit.hpp:63
ModEvent commit(Space &home, unsigned int a, FloatView x, int i, FloatNumBranch n)
Commit view x at position i to value n for alternative a.
Definition: val-commit.hpp:47
void print(const Space &home, unsigned int a, FloatView x, int i, FloatNumBranch n, std::ostream &o) const
Print on o the alternative with view x at position i and value n.
Definition: val-commit.hpp:67
ValCommitLqGq(Space &home, const ValBranch< Var > &vb)
Constructor for initialization.
Definition: val-commit.hpp:41
Float view for float variables.
Definition: view.hpp:52
No-good literal recorded during search.
Definition: core.hpp:1340
Computation spaces.
Definition: core.hpp:1742
Value branching information.
Definition: val.hpp:41
Base class for value commit.
Definition: val-commit.hpp:44
int ModEvent
Type for modification events.
Definition: core.hpp:62
Gecode::IntArgs i({1, 2, 3, 4})
#define forceinline
Definition: config.hpp:185