-
Notifications
You must be signed in to change notification settings - Fork 4
/
Copy pathFold.php
151 lines (138 loc) · 2.64 KB
/
Fold.php
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
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
<?php
declare(strict_types = 1);
namespace Innmind\Immutable;
use Innmind\Immutable\Fold\{
Implementation,
With,
Result,
Failure,
};
/**
* @template F Failure
* @template R Result
* @template C Computation
* @psalm-immutable
* @deprecated
*/
final class Fold
{
private Implementation $fold;
private function __construct(Implementation $fold)
{
$this->fold = $fold;
}
/**
* @psalm-pure
*
* @template T
* @template U
* @template V
*
* @param V $value
*
* @return self<T, U, V>
*/
public static function with(mixed $value): self
{
return new self(new With($value));
}
/**
* @psalm-pure
*
* @template T
* @template U
* @template V
*
* @param U $result
*
* @return self<T, U, V>
*/
public static function result(mixed $result): self
{
return new self(new Result($result));
}
/**
* @psalm-pure
*
* @template T
* @template U
* @template V
*
* @param T $failure
*
* @return self<T, U, V>
*/
public static function fail(mixed $failure): self
{
return new self(new Failure($failure));
}
/**
* @template A
*
* @param callable(C): A $map
*
* @return self<F, R, A>
*/
public function map(callable $map): self
{
return new self($this->fold->map($map));
}
/**
* @template T
* @template U
* @template V
*
* @param callable(C): self<T, U, V> $map
*
* @return self<F|T, R|U, V>
*/
public function flatMap(callable $map): self
{
return $this->fold->flatMap($map);
}
/**
* @template A
*
* @param callable(R): A $map
*
* @return self<F, A, C>
*/
public function mapResult(callable $map): self
{
return new self($this->fold->mapResult($map));
}
/**
* @template A
*
* @param callable(F): A $map
*
* @return self<A, R, C>
*/
public function mapFailure(callable $map): self
{
return new self($this->fold->mapFailure($map));
}
/**
* @return Maybe<Either<F, R>>
*/
public function maybe(): Maybe
{
return $this->fold->maybe();
}
/**
* @template T
*
* @param callable(C): T $with
* @param callable(R): T $result
* @param callable(F): T $failure
*
* @return T
*/
public function match(
callable $with,
callable $result,
callable $failure,
): mixed {
return $this->fold->match($with, $result, $failure);
}
}