blob: 9deaed962064b9dfb10e013376d04c7b410ad03c (
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
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
|
/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/Assertions.h>
#include <AK/Optional.h>
namespace AK {
template<typename ValueT, typename ErrorT>
class [[nodiscard]] Result {
public:
using ValueType = ValueT;
using ErrorType = ErrorT;
Result(ValueType const& res)
: m_result(res)
{
}
Result(ValueType&& res)
: m_result(move(res))
{
}
Result(ErrorType const& error)
: m_error(error)
{
}
Result(ErrorType&& error)
: m_error(move(error))
{
}
Result(Result&& other) = default;
Result(Result const& other) = default;
~Result() = default;
ValueType& value()
{
return m_result.value();
}
ErrorType& error()
{
return m_error.value();
}
bool is_error() const
{
return m_error.has_value();
}
ValueType release_value()
{
return m_result.release_value();
}
ErrorType release_error()
{
return m_error.release_value();
}
private:
Optional<ValueType> m_result;
Optional<ErrorType> m_error;
};
// Partial specialization for void value type
template<typename ErrorT>
class [[nodiscard]] Result<void, ErrorT> {
public:
using ValueType = void;
using ErrorType = ErrorT;
Result(ErrorType const& error)
: m_error(error)
{
}
Result(ErrorType&& error)
: m_error(move(error))
{
}
Result() = default;
Result(Result&& other) = default;
Result(Result const& other) = default;
~Result() = default;
// For compatibility with TRY().
void value() {};
void release_value() {};
ErrorType& error()
{
return m_error.value();
}
bool is_error() const
{
return m_error.has_value();
}
ErrorType release_error()
{
return m_error.release_value();
}
private:
Optional<ErrorType> m_error;
};
}
#if USING_AK_GLOBALLY
using AK::Result;
#endif
|
