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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  * Guido Tack <tack@gecode.org>
9  *
10  * Copyright:
11  * Christopher Mears, 2011
12  * Christian Schulte, 2011
13  * Guido Tack, 2011
14  *
15  * Last modified:
16  * $Date: 2012-11-21 13:28:07 +0100 (Wed, 21 Nov 2012) $ by $Author: schulte $
17  * $Revision: 13181 $
18  *
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43 
44 #include <gecode/set/precede.hh>
45 
46 namespace Gecode {
47 
48  void
49  precede(Home home, const SetVarArgs& x, int s, int t) {
50  using namespace Set;
51  Limits::check(s,"Set::precede");
52  Limits::check(t,"Set::precede");
53  if (home.failed()) return;
54 
55  ViewArray<SetView> y(home, x);
57  }
58 
59  void
60  precede(Home home, const SetVarArgs& x, const IntArgs& c) {
61  using namespace Set;
62  if (c.size() < 2)
63  return;
64  for (int i=c.size(); i--; )
65  Limits::check(c[i],"Set::precede");
66  if (home.failed()) return;
67 
68  for (int i=c.size()-1; i--; ) {
69  ViewArray<SetView> y(home, x);
70  GECODE_ES_FAIL(Precede::Single<SetView>::post(home, y, c[i], c[i+1]));
71  }
72  }
73 
74 }
75 
76 // STATISTICS: set-post
bool failed(void) const
Check whether corresponding space is failed.
Definition: core.hpp:3446
NodeType t
Type of node.
Definition: bool-expr.cpp:234
void check(int n, const char *l)
Check whether integer n is in range, otherwise throw overflow exception with information l...
Definition: limits.hpp:41
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 arguments.
Definition: int.hh:607
Passing set variables.
Definition: set.hh:490
Node * x
Pointer to corresponding Boolean expression node.
Definition: bool-expr.cpp:253
Single value precedence propagator.
Definition: precede.hh:65
Gecode toplevel namespace
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