Generated on Sat Jan 20 2018 22:21:15 for Gecode by doxygen 1.8.13
when.hpp
Go to the documentation of this file.
1 /* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */
2 /*
3  * Main authors:
4  * Christian Schulte <schulte@gecode.org>
5  *
6  * Copyright:
7  * Christian Schulte, 2009
8  *
9  * Last modified:
10  * $Date: 2017-02-21 01:08:52 +0100 (Tue, 21 Feb 2017) $ by $Author: schulte $
11  * $Revision: 15456 $
12  *
13  * This file is part of Gecode, the generic constraint
14  * development environment:
15  * http://www.gecode.org
16  *
17  * Permission is hereby granted, free of charge, to any person obtaining
18  * a copy of this software and associated documentation files (the
19  * "Software"), to deal in the Software without restriction, including
20  * without limitation the rights to use, copy, modify, merge, publish,
21  * distribute, sublicense, and/or sell copies of the Software, and to
22  * permit persons to whom the Software is furnished to do so, subject to
23  * the following conditions:
24  *
25  * The above copyright notice and this permission notice shall be
26  * included in all copies or substantial portions of the Software.
27  *
28  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
29  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
30  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
31  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
32  * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
33  * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
34  * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
35  *
36  */
37 
38 namespace Gecode { namespace Int { namespace Exec {
39 
42  std::function<void(Space& home)> t0,
43  std::function<void(Space& home)> e0)
44  : UnaryPropagator<BoolView,PC_BOOL_VAL>(home,x), t(t0), e(e0) {
45  home.notice(*this,AP_DISPOSE);
46  }
47 
49  When::When(Space& home, bool share, When& p)
50  : UnaryPropagator<BoolView,PC_BOOL_VAL>(home,share,p) {
51  t.update(home, share, p.t);
52  e.update(home, share, p.e);
53  }
54 
57  std::function<void(Space& home)> t,
58  std::function<void(Space& home)> e) {
59  if (!t)
60  throw InvalidFunction("When::When");
61  if (!e)
62  throw InvalidFunction("When::When");
63  if (x.zero()) {
64  e(home);
65  return home.failed() ? ES_FAILED : ES_OK;
66  } else if (x.one()) {
67  t(home);
68  return home.failed() ? ES_FAILED : ES_OK;
69  } else {
70  (void) new (home) When(home,x,t,e);
71  return ES_OK;
72  }
73  }
74 
75 }}}
76 
77 // STATISTICS: int-prop
78 
NodeType t
Type of node.
Definition: bool-expr.cpp:234
bool zero(void) const
Test whether view is assigned to be zero.
Definition: bool.hpp:214
Actor must always be disposed.
Definition: core.hpp:630
Unary propagator.
Definition: propagator.hpp:59
bool one(void) const
Test whether view is assigned to be one.
Definition: bool.hpp:218
SharedData< std::function< void(Space &home)> > t
Then function.
Definition: exec.hh:60
Computation spaces.
Definition: core.hpp:1748
int p
Number of positive literals for node type.
Definition: bool-expr.cpp:236
Execution has resulted in failure.
Definition: core.hpp:542
bool failed(void) const
Check whether space is failed.
Definition: core.hpp:4095
Conditional propagator.
Definition: exec.hh:56
Exception: invalid function
Definition: exception.hpp:118
SharedData< std::function< void(Space &home)> > e
Else function pointer.
Definition: exec.hh:62
void notice(Actor &a, ActorProperty p, bool duplicate=false)
Notice actor property.
Definition: core.hpp:4123
ExecStatus
Definition: core.hpp:540
#define forceinline
Definition: config.hpp:173
static ExecStatus post(Home home, BoolView x, std::function< void(Space &home)> t, std::function< void(Space &home)> e)
Post propagator.
Definition: when.hpp:56
Post propagator for SetVar x
Definition: set.hh:784
Execution is okay.
Definition: core.hpp:544
Gecode toplevel namespace
When(Space &home, bool share, When &p)
Constructor for cloning p.
Definition: when.hpp:49
Home class for posting propagators
Definition: core.hpp:922
const Gecode::PropCond PC_BOOL_VAL
Propagate when a view becomes assigned (single value)
Definition: var-type.hpp:126
Boolean view for Boolean variables.
Definition: view.hpp:1315