1 | /* |
2 | Copyright (c) 2009 Volker Krause <vkrause@kde.org> |
3 | |
4 | This library is free software; you can redistribute it and/or modify it |
5 | under the terms of the GNU Library General Public License as published by |
6 | the Free Software Foundation; either version 2 of the License, or (at your |
7 | option) any later version. |
8 | |
9 | This library is distributed in the hope that it will be useful, but WITHOUT |
10 | ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
11 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public |
12 | License for more details. |
13 | |
14 | You should have received a copy of the GNU Library General Public License |
15 | along with this library; see the file COPYING.LIB. If not, write to the |
16 | Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
17 | 02110-1301, USA. |
18 | */ |
19 | |
20 | #ifndef KPIMUTILS_SUPERTRAIT_H |
21 | #define KPIMUTILS_SUPERTRAIT_H |
22 | |
23 | namespace KPIMUtils { |
24 | |
25 | /** |
26 | @internal |
27 | @see super_class |
28 | */ |
29 | template <typename Super> |
30 | struct SuperClassTrait |
31 | { |
32 | typedef Super Type; |
33 | }; |
34 | |
35 | /** |
36 | Type trait to provide information about a base class for a given class. |
37 | Used eg. for the Akonadi payload mechanism. |
38 | |
39 | To provide base class introspection for own types, extend this trait as follows: |
40 | @code |
41 | namespace KPIMUtils |
42 | { |
43 | template <> struct SuperClass<MyClass> : public SuperClassTrait<MyBaseClass>{}; |
44 | } |
45 | @endcode |
46 | */ |
47 | template <typename Class> struct SuperClass : public SuperClassTrait<Class>{}; |
48 | } |
49 | |
50 | #endif |
51 | |