This repository was archived by the owner on Oct 19, 2024. It is now read-only.
-
-
Notifications
You must be signed in to change notification settings - Fork 151
Expand file tree
/
Copy pathAnyEncodable.swift
More file actions
291 lines (266 loc) · 9.05 KB
/
AnyEncodable.swift
File metadata and controls
291 lines (266 loc) · 9.05 KB
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
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
#if canImport(Foundation)
import Foundation
#endif
/**
A type-erased `Encodable` value.
The `AnyEncodable` type forwards encoding responsibilities
to an underlying value, hiding its specific underlying type.
You can encode mixed-type values in dictionaries
and other collections that require `Encodable` conformance
by declaring their contained type to be `AnyEncodable`:
let dictionary: [String: AnyEncodable] = [
"boolean": true,
"integer": 42,
"double": 3.141592653589793,
"string": "string",
"array": [1, 2, 3],
"nested": [
"a": "alpha",
"b": "bravo",
"c": "charlie"
],
"null": nil
]
let encoder = JSONEncoder()
let json = try! encoder.encode(dictionary)
*/
@frozen public struct AnyEncodable: Encodable {
public let value: Any
public init<T>(_ value: T?) {
self.value = value ?? ()
}
}
@usableFromInline
protocol _AnyEncodable {
var value: Any { get }
init<T>(_ value: T?)
}
extension AnyEncodable: _AnyEncodable {}
// MARK: - Encodable
extension _AnyEncodable {
public func encode(to encoder: Encoder) throws {
var container = encoder.singleValueContainer()
switch value {
#if canImport(Foundation)
case is NSNull:
try container.encodeNil()
#endif
case is Void:
10BC0
try container.encodeNil()
case let bool as Bool:
try container.encode(bool)
case let int as Int:
try container.encode(int)
case let int8 as Int8:
try container.encode(int8)
case let int16 as Int16:
try container.encode(int16)
case let int32 as Int32:
try container.encode(int32)
case let int64 as Int64:
try container.encode(int64)
case let uint as UInt:
try container.encode(uint)
case let uint8 as UInt8:
try container.encode(uint8)
case let uint16 as UInt16:
try container.encode(uint16)
case let uint32 as UInt32:
try container.encode(uint32)
case let uint64 as UInt64:
try container.encode(uint64)
case let float as Float:
try container.encode(float)
case let double as Double:
try container.encode(double)
case let string as String:
try container.encode(string)
#if canImport(Foundation)
case let number as NSNumber:
try encode(nsnumber: number, into: &container)
case let date as Date:
try container.encode(date)
case let url as URL:
try container.encode(url)
#endif
case let array as [Any?]:
try container.encode(array.map { AnyEncodable($0) })
case let dictionary as [String: Any?]:
try container.encode(dictionary.mapValues { AnyEncodable($0) })
case let encodable as Encodable:
try encodable.encode(to: encoder)
default:
let context = EncodingError.Context(codingPath: container.codingPath, debugDescription: "AnyEncodable value cannot be encoded")
throw EncodingError.invalidValue(value, context)
}
}
#if canImport(Foundation)
private func encode(nsnumber: NSNumber, into container: inout SingleValueEncodingContainer) throws {
switch Character(Unicode.Scalar(UInt8(nsnumber.objCType.pointee))) {
case "B":
try container.encode(nsnumber.boolValue)
case "c":
try container.encode(nsnumber.int8Value)
case "s":
try container.encode(nsnumber.int16Value)
case "i", "l":
try container.encode(nsnumber.int32Value)
case "q":
try container.encode(nsnumber.int64Value)
case "C":
try container.encode(nsnumber.uint8Value)
case "S":
try container.encode(nsnumber.uint16Value)
case "I", "L":
try container.encode(nsnumber.uint32Value)
case "Q":
try container.encode(nsnumber.uint64Value)
case "f":
try container.encode(nsnumber.floatValue)
case "d":
try container.encode(nsnumber.doubleValue)
default:
let context = EncodingError.Context(codingPath: container.codingPath, debugDescription: "NSNumber cannot be encoded because its type is not handled")
throw EncodingError.invalidValue(nsnumber, context)
}
}
#endif
}
extension AnyEncodable: Equatable {
public static func == (lhs: AnyEncodable, rhs: AnyEncodable) -> Bool {
switch (lhs.value, rhs.value) {
case is (Void, Void):
return true
case let (lhs as Bool, rhs as Bool):
return lhs == rhs
case let (lhs as Int, rhs as Int):
return lhs == rhs
case let (lhs as Int8, rhs as Int8):
return lhs == rhs
case let (lhs as Int16, rhs as Int16):
return lhs == rhs
case let (lhs as Int32, rhs as Int32):
return lhs == rhs
case let (lhs as Int64, rhs as Int64):
return lhs == rhs
case let (lhs as UInt, rhs as UInt):
return lhs == rhs
case let (lhs as UInt8, rhs as UInt8):
return lhs == rhs
case let (lhs as UInt16, rhs as UInt16):
return lhs == rhs
case let (lhs as UInt32, rhs as UInt32):
return lhs == rhs
case let (lhs as UInt64, rhs as UInt64):
return lhs == rhs
case let (lhs as Float, rhs as Float):
return lhs == rhs
case let (lhs as Double, rhs as Double):
return lhs == rhs
case let (lhs as String, rhs as String):
return lhs == rhs
case let (lhs as [String: AnyEncodable], rhs as [String: AnyEncodable]):
return lhs == rhs
case let (lhs as [AnyEncodable], rhs as [AnyEncodable]):
return lhs == rhs
default:
return false
}
}
}
extension AnyEncodable: CustomStringConvertible {
public var description: String {
switch value {
case is Void:
return String(describing: nil as Any?)
case let value as CustomStringConvertible:
return value.description
default:
return String(describing: value)
}
}
}
extension AnyEncodable: CustomDebugStringConvertible {
public var debugDescription: String {
switch value {
case let value as CustomDebugStringConvertible:
return "AnyEncodable(\(value.debugDescription))"
default:
return "AnyEncodable(\(description))"
}
}
}
extension AnyEncodable: ExpressibleByNilLiteral {}
extension AnyEncodable: ExpressibleByBooleanLiteral {}
extension AnyEncodable: ExpressibleByIntegerLiteral {}
extension AnyEncodable: ExpressibleByFloatLiteral {}
extension AnyEncodable: ExpressibleByStringLiteral {}
extension AnyEncodable: ExpressibleByStringInterpolation {}
extension AnyEncodable: ExpressibleByArrayLiteral {}
extension AnyEncodable: ExpressibleByDictionaryLiteral {}
extension _AnyEncodable {
public init(nilLiteral _: ()) {
self.init(nil as Any?)
}
public init(booleanLiteral value: Bool) {
self.init(value)
}
public init(integerLiteral value: Int) {
self.init(value)
}
public init(floatLiteral value: Double) {
self.init(value)
}
public init(extendedGraphemeClusterLiteral value: String) {
self.init(value)
}
public init(stringLiteral value: String) {
self.init(value)
}
public init(arrayLiteral elements: Any...) {
self.init(elements)
}
public init(dictionaryLiteral elements: (AnyHashable, Any)...) {
self.init([AnyHashable: Any](elements, uniquingKeysWith: { first, _ in first }))
}
}
extension AnyEncodable: Hashable {
public func hash(into hasher: inout Hasher) {
switch value {
case let value as Bool:
hasher.combine(value)
case let value as Int:
hasher.combine(value)
case let value as Int8:
hasher.combine(value)
case let value as Int16:
hasher.combine(value)
case let value as Int32:
hasher.combine(value)
case let value as Int64:
hasher.combine(value)
case let value as UInt:
hasher.combine(value)
case let value as UInt8:
hasher.combine(value)
case let value as UInt16:
hasher.combine(value)
case let value as UInt32:
hasher.combine(value)
case let value as UInt64:
hasher.combine(value)
case let value as Float:
hasher.combine(value)
case let value as Double:
hasher.combine(value)
case let value as String:
hasher.combine(value)
case let value as [String: AnyEncodable]:
hasher.combine(value)
case let value as [AnyEncodable]:
hasher.combine(value)
default:
break
}
}
}