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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  * Last modified:
14  * $Date: 2012-11-21 13:28:07 +0100 (Wed, 21 Nov 2012) $ by $Author: schulte $
15  * $Revision: 13181 $
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41 
42 #include <gecode/int/precede.hh>
43 
44 namespace Gecode {
45 
46  void
47  precede(Home home, const IntVarArgs& x, int s, int t, IntConLevel) {
48  using namespace Int;
49  Limits::check(s,"Int::precede");
50  Limits::check(t,"Int::precede");
51  if (home.failed()) return;
52 
53  ViewArray<IntView> y(home, x);
55  }
56 
57  void
58  precede(Home home, const IntVarArgs& x, const IntArgs& c, IntConLevel) {
59  using namespace Int;
60  if (c.size() < 2)
61  return;
62  for (int i=c.size(); i--; )
63  Limits::check(c[i],"Int::precede");
64  if (home.failed()) return;
65 
66  for (int i=c.size()-1; i--; ) {
67  ViewArray<IntView> y(home, x);
68  GECODE_ES_FAIL(Precede::Single<IntView>::post(home, y, c[i], c[i+1]));
69  }
70  }
71 
72 }
73 
74 // STATISTICS: int-post
75 
bool failed(void) const
Check whether corresponding space is failed.
Definition: core.hpp:3446
NodeType t
Type of node.
Definition: bool-expr.cpp:234
IntConLevel
Consistency levels for integer propagators.
Definition: int.hh:937
int size(void) const
Return size of array (number of elements)
Definition: array.hpp:1662
Gecode::FloatVal c(-8, 8)
Gecode::IntArgs i(4, 1, 2, 3, 4)
void precede(Home home, const IntVarArgs &x, int s, int t, IntConLevel)
Post propagator that s precedes t in x.
Definition: precede.cpp:47
Passing integer variables.
Definition: int.hh:636
Passing integer arguments.
Definition: int.hh:607
Node * x
Pointer to corresponding Boolean expression node.
Definition: bool-expr.cpp:253
Single value precedence propagator.
Definition: precede.hh:65
Gecode toplevel namespace
void check(int n, const char *l)
Check whether n is in range, otherwise throw out of limits with information l.
Definition: limits.hpp:50
Home class for posting propagators
Definition: core.hpp:717
#define GECODE_ES_FAIL(es)
Check whether execution status es is failed, and fail space home.
Definition: macros.hpp:96