blob: 773f19f75651d00ee3208fd2fedacbe7ab5cce33 (
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
40
41
|
/**
* @file tempset.h
* @author Nat Goodspeed
* @date 2024-06-12
* @brief Temporarily override a variable for scope duration, then restore
*
* $LicenseInfo:firstyear=2024&license=viewerlgpl$
* Copyright (c) 2024, Linden Research, Inc.
* $/LicenseInfo$
*/
#if ! defined(LL_TEMPSET_H)
#define LL_TEMPSET_H
// RAII class to set specified variable to specified value
// only for the duration of containing scope
template <typename VAR, typename VALUE>
class TempSet
{
public:
TempSet(VAR& var, const VALUE& value):
mVar(var),
mOldValue(mVar)
{
mVar = value;
}
TempSet(const TempSet&) = delete;
TempSet& operator=(const TempSet&) = delete;
~TempSet()
{
mVar = mOldValue;
}
private:
VAR& mVar;
VAR mOldValue;
};
#endif /* ! defined(LL_TEMPSET_H) */
|
