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Add CodingKeyRepresentable conditional conformance #66

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merged 2 commits into from
Feb 10, 2023
Merged

Add CodingKeyRepresentable conditional conformance #66

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c8cae8b
Add `CodingKeyRepresentable` conditional conformance
stephencelis Feb 10, 2023
61f0f37
fix
stephencelis Feb 10, 2023
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15 changes: 15 additions & 0 deletions Sources/Tagged/Tagged.swift
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Original file line number Diff line number Diff line change
Expand Up @@ -89,6 +89,21 @@ extension Tagged: Encodable where RawValue: Encodable {
}
}

#if swift(>=5.6)
@available(macOS 12.3, iOS 15.4, watchOS 8.5, tvOS 15.4, *)
extension Tagged: CodingKeyRepresentable where RawValue: CodingKeyRepresentable {
public init?<T: CodingKey>(codingKey: T) {
guard let rawValue = RawValue(codingKey: codingKey)
else { return nil }
self.init(rawValue: rawValue)
}

public var codingKey: CodingKey {
self.rawValue.codingKey
}
}
#endif

extension Tagged: Equatable where RawValue: Equatable {}

extension Tagged: Error where RawValue: Error {}
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13 changes: 13 additions & 0 deletions Tests/TaggedTests/TaggedTests.swift
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Expand Up @@ -70,6 +70,19 @@ final class TaggedTests: XCTestCase {
)
}

#if swift(>=5.6)
func testCodingKeyRepresentable() {
if #available(macOS 12.3, iOS 15.4, watchOS 8.5, tvOS 15.4, *) {
enum Key {}
let xs: [Tagged<Key, String>: String] = [Tagged("Hello"): "World"]
XCTAssertEqual(
String(decoding: try JSONEncoder().encode(xs), as: UTF8.self),
#"{"Hello":"World"}"#
)
}
}
#endif

func testEquatable() {
XCTAssertEqual(Tagged<Tag, Int>(rawValue: 1), Tagged<Tag, Int>(rawValue: 1))
}
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