1 /*
2   This file is part of GammaRay, the Qt application inspection and
3   manipulation tool.
4 
5   Copyright (C) 2013-2021 Klarälvdalens Datakonsult AB, a KDAB Group company, info@kdab.com
6   Author: Milian Wolff <milian.wolff@kdab.com>
7 
8   Licensees holding valid commercial KDAB GammaRay licenses may use this file in
9   accordance with GammaRay Commercial License Agreement provided with the Software.
10 
11   Contact info@kdab.com if any conditions of this licensing are not clear to you.
12 
13   This program is free software; you can redistribute it and/or modify
14   it under the terms of the GNU General Public License as published by
15   the Free Software Foundation, either version 2 of the License, or
16   (at your option) any later version.
17 
18   This program is distributed in the hope that it will be useful,
19   but WITHOUT ANY WARRANTY; without even the implied warranty of
20   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
21   GNU General Public License for more details.
22 
23   You should have received a copy of the GNU General Public License
24   along with this program.  If not, see <http://www.gnu.org/licenses/>.
25 */
26 
27 #ifndef GAMMARAY_SETTEMPVALUE_H
28 #define GAMMARAY_SETTEMPVALUE_H
29 
30 #include <qglobal.h>
31 
32 namespace GammaRay {
33 /**
34  * @brief GammaRay utilities.
35  */
36 namespace Util {
37 /**
38  * Temporarily overwrite a given object with a new value and reset the value
39  * when the scope is exited.
40  */
41 template<class T>
42 struct SetTempValue
43 {
SetTempValueSetTempValue44     SetTempValue(T &obj, T newValue)
45         : obj(obj)
46         , oldValue(obj)
47     {
48         obj = newValue;
49     }
50 
~SetTempValueSetTempValue51     ~SetTempValue()
52     {
53         obj = oldValue;
54     }
55 
56     Q_DISABLE_COPY(SetTempValue)
57     T& obj;
58     T oldValue;
59 };
60 }
61 }
62 
63 #endif // GAMMARAY_SETTEMPVALUE_H
64