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dekker.one
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, 2007
8 *
9 * This file is part of Gecode, the generic constraint
10 * development environment:
11 * http://www.gecode.org
12 *
13 * Permission is hereby granted, free of charge, to any person obtaining
14 * a copy of this software and associated documentation files (the
15 * "Software"), to deal in the Software without restriction, including
16 * without limitation the rights to use, copy, modify, merge, publish,
17 * distribute, sublicense, and/or sell copies of the Software, and to
18 * permit persons to whom the Software is furnished to do so, subject to
19 * the following conditions:
20 *
21 * The above copyright notice and this permission notice shall be
22 * included in all copies or substantial portions of the Software.
23 *
24 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
25 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
26 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
27 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
28 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
29 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
30 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
31 *
32 */
33
34namespace Gecode { namespace Iter { namespace Values {
35
36 /**
37 * \brief Value iterator for single value
38 *
39 * \ingroup FuncIterValues
40 */
41
42 class Singleton {
43 protected:
44 /// Whether the iterator is done
45 bool done;
46 /// The single value
47 int v;
48 public:
49 /// \name Constructors and initialization
50 //@{
51 /// Default constructor
52 Singleton(void);
53 /// Initialize with value \a v
54 Singleton(int v);
55 /// Initialize with value \a v
56 void init(int v);
57 //@}
58
59 /// \name Iteration control
60 //@{
61 /// Test whether iterator is still at a value or done
62 bool operator ()(void) const;
63 /// Move iterator to next value (if possible)
64 void operator ++(void);
65 //@}
66
67 /// \name %Value access
68 //@{
69 /// Return current value
70 int val(void) const;
71 //@}
72 };
73
74
75 forceinline
76 Singleton::Singleton(void) {}
77
78 forceinline
79 Singleton::Singleton(int v0)
80 : done(false), v(v0) {}
81
82 forceinline void
83 Singleton::init(int v0) {
84 done=false; v=v0;
85 }
86
87 forceinline void
88 Singleton::operator ++(void) {
89 done=true;
90 }
91 forceinline bool
92 Singleton::operator ()(void) const {
93 return !done;
94 }
95
96 forceinline int
97 Singleton::val(void) const {
98 return v;
99 }
100
101
102}}}
103
104// STATISTICS: iter-any
105