Generated on Sat Apr 10 2021 00:00:00 for Gecode by doxygen 1.9.1
values-positive.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, 2008
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 
34 namespace Gecode { namespace Iter { namespace Values {
35 
42  template<class I, bool strict=false>
43  class Positive {
44  protected:
46  I i;
47  public:
49 
50  Positive(void);
53  Positive(I& i);
55  void init(I& i);
57 
59 
60  bool operator ()(void) const;
63  void operator ++(void);
65 
67 
68  int val(void) const;
71  };
72 
73 
74  template<class I, bool strict>
77 
78  template<class I, bool strict>
79  forceinline void
81  i=i0;
82  if (strict) {
83  while (i() && (i.val() <= 0)) ++i;
84  } else {
85  while (i() && (i.val() < 0)) ++i;
86  }
87  }
88 
89  template<class I, bool strict>
92  if (strict) {
93  while (i() && (i.val() <= 0)) ++i;
94  } else {
95  while (i() && (i.val() < 0)) ++i;
96  }
97  }
98 
99  template<class I, bool strict>
100  forceinline void
102  ++i;
103  }
104  template<class I, bool strict>
105  forceinline bool
107  return i();
108  }
109 
110  template<class I, bool strict>
111  forceinline int
113  return i.val();
114  }
115 
116 }}}
117 
118 // STATISTICS: iter-any
119 
Value iterator for selecting only positive values.
bool operator()(void) const
Test whether iterator is still at a value or done.
void operator++(void)
Move iterator to next value (if possible)
void init(I &i)
Initialize with values from i.
Positive(void)
Default constructor.
int val(void) const
Return current value.
Gecode::IntArgs i({1, 2, 3, 4})
#define forceinline
Definition: config.hpp:192