summaryrefslogtreecommitdiff
path: root/AK/ScopedValueRollback.h
blob: d3159e9bb90983ffdd5276a8c191b8516991c5f1 (plain)
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
/*
 * Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
 *
 * SPDX-License-Identifier: BSD-2-Clause
 */

#pragma once

namespace AK {

template<typename T>
class ScopedValueRollback {
public:
    ScopedValueRollback(T& variable)
        : m_variable(variable)
        , m_saved_value(variable)
    {
    }

    ~ScopedValueRollback()
    {
        m_variable = m_saved_value;
    }

    void set_override_rollback_value(T const& value)
    {
        m_saved_value = value;
    }

private:
    T& m_variable;
    T m_saved_value;
};

}

#if USING_AK_GLOBALLY
using AK::ScopedValueRollback;
#endif