blob: a7156882dcbd61ac94585777f94a04fd0de5b3e8 (
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
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
68
69
70
|
/*
* Copyright (C) 2005-2018 Team Kodi
* This file is part of Kodi - https://kodi.tv
*
* SPDX-License-Identifier: GPL-2.0-or-later
* See LICENSES/README.md for more information.
*/
#pragma once
#include "Exception.h"
namespace XBMCAddon
{
enum WhichAlternative { none, first, second };
template<typename T1, typename T2> class Alternative
{
public:
private:
WhichAlternative pos = none;
T1 d1;
T2 d2;
public:
Alternative() = default;
inline WhichAlternative which() const { return pos; }
inline T1& former()
{
if (pos == second)// first and none is ok
throw WrongTypeException("Access of XBMCAddon::Alternative as incorrect type");
if (pos == none)
d1 = T1();
pos = first;
return d1;
}
inline const T1& former() const
{
if (pos != first)
throw WrongTypeException("Access of XBMCAddon::Alternative as incorrect type");
return d1;
}
inline T2& later()
{
if (pos == first)
throw WrongTypeException("Access of XBMCAddon::Alternative as incorrect type");
if (pos == none)
d2 = T2();
pos = second;
return d2;
}
inline const T2& later() const
{
if (pos != second)
throw WrongTypeException("Access of XBMCAddon::Alternative as incorrect type");
return d2;
}
inline operator T1& () { return former(); }
inline operator const T1& () const { return former(); }
inline operator T2& () { return later(); }
inline operator const T2& () const { return later(); }
};
}
|
