permlib 0.2.9
Library for permutation computations
subgroup_predicate.h
1// ---------------------------------------------------------------------------
2//
3// This file is part of PermLib.
4//
5// Copyright (c) 2009-2011 Thomas Rehn <thomas@carmen76.de>
6// All rights reserved.
7//
8// Redistribution and use in source and binary forms, with or without
9// modification, are permitted provided that the following conditions
10// are met:
11// 1. Redistributions of source code must retain the above copyright
12// notice, this list of conditions and the following disclaimer.
13// 2. Redistributions in binary form must reproduce the above copyright
14// notice, this list of conditions and the following disclaimer in the
15// documentation and/or other materials provided with the distribution.
16// 3. The name of the author may not be used to endorse or promote products
17// derived from this software without specific prior written permission.
18//
19// THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
20// IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
21// OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
22// IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
23// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
24// NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
28// THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29//
30// ---------------------------------------------------------------------------
31
32
33#ifndef SUBGROUPPREDICATE_H_
34#define SUBGROUPPREDICATE_H_
35
36#include <functional>
37
38namespace permlib {
39
40template <class PERM>
42
44template <class PERM>
45class SubgroupPredicate : public std::unary_function<PERM, bool> {
46public:
48 virtual ~SubgroupPredicate() {}
49
51 virtual bool operator()(const PERM &) const = 0;
52
54
62 virtual bool childRestriction(const PERM &h, unsigned int i, unsigned long beta_i) const = 0;
63
65
68 virtual unsigned int limit() const = 0;
69};
70
71}
72
73#endif // -- SUBGROUPPREDICATE_H_
Definition: subgroup_predicate.h:41
abstract base class for subgroup (and coset) predicates
Definition: subgroup_predicate.h:45
virtual unsigned int limit() const =0
limit of recursion depth in backtrack search
virtual bool operator()(const PERM &) const =0
true iff group element fulfills predicate
virtual ~SubgroupPredicate()
virtual destructor
Definition: subgroup_predicate.h:48
virtual bool childRestriction(const PERM &h, unsigned int i, unsigned long beta_i) const =0
checks if a given group element should not be followed in backtrack search