1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
|
/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2006 Robert Osfield
*
* This library is open source and may be redistributed and/or modified under
* the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
* (at your option) any later version. The full license is in LICENSE file
* included with this distribution, and on the openscenegraph.org website.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* OpenSceneGraph Public License for more details.
*/
//osgIntrospection - Copyright (C) 2005 Marco Jez
#ifndef OSGINTROSPECTION_COMPARATOR_
#define OSGINTROSPECTION_COMPARATOR_
namespace osgIntrospection
{
class Value;
struct Comparator
{
virtual bool isEqualTo(const Value& l, const Value& r) const = 0;
virtual bool isLessThanOrEqualTo(const Value& l, const Value& r) const = 0;
virtual ~Comparator() {}
};
template<typename T>
struct TotalOrderComparator: Comparator
{
virtual bool isEqualTo(const Value& l, const Value& r) const
{
const T &vl = variant_cast<const T &>(l);
const T &vr = variant_cast<const T &>(r);
return vl <= vr && vr <= vl;
}
virtual bool isLessThanOrEqualTo(const Value& l, const Value& r) const
{
return variant_cast<const T &>(l) <= variant_cast<const T &>(r);
}
virtual ~TotalOrderComparator() {}
};
template<typename T>
struct PartialOrderComparator: Comparator
{
virtual bool isEqualTo(const Value& l, const Value& r) const
{
return variant_cast<const T &>(l) == variant_cast<const T &>(r);
}
virtual bool isLessThanOrEqualTo(const Value& , const Value& ) const
{
throw ComparisonOperatorNotSupportedException(extended_typeid<T>(), "less than or equal to");
}
virtual ~PartialOrderComparator() {}
};
}
#endif
|
