Fix `Defaults.reset()`

Defaults.xcodeproj/project.pbxproj

@@ -21,6 +21,14 @@
 		E286D0C823B8D54C00570D1E /* Observation+Combine.swift in Sources */ = {isa = PBXBuildFile; fileRef = E286D0C623B8D51100570D1E /* Observation+Combine.swift */; };
 		E286D0C923B8D54D00570D1E /* Observation+Combine.swift in Sources */ = {isa = PBXBuildFile; fileRef = E286D0C623B8D51100570D1E /* Observation+Combine.swift */; };
 		E286D0CA23B8D54E00570D1E /* Observation+Combine.swift in Sources */ = {isa = PBXBuildFile; fileRef = E286D0C623B8D51100570D1E /* Observation+Combine.swift */; };
+		E339B3B32449ED2000E7A40A /* Reset.swift in Sources */ = {isa = PBXBuildFile; fileRef = E339B3B22449ED2000E7A40A /* Reset.swift */; };
+		E339B3B42449ED2000E7A40A /* Reset.swift in Sources */ = {isa = PBXBuildFile; fileRef = E339B3B22449ED2000E7A40A /* Reset.swift */; };
+		E339B3B52449ED2000E7A40A /* Reset.swift in Sources */ = {isa = PBXBuildFile; fileRef = E339B3B22449ED2000E7A40A /* Reset.swift */; };
+		E339B3B62449ED2000E7A40A /* Reset.swift in Sources */ = {isa = PBXBuildFile; fileRef = E339B3B22449ED2000E7A40A /* Reset.swift */; };
+		E339B3B82449F10D00E7A40A /* UserDefaults.swift in Sources */ = {isa = PBXBuildFile; fileRef = E339B3B72449F10D00E7A40A /* UserDefaults.swift */; };
+		E339B3B92449F10D00E7A40A /* UserDefaults.swift in Sources */ = {isa = PBXBuildFile; fileRef = E339B3B72449F10D00E7A40A /* UserDefaults.swift */; };
+		E339B3BA2449F10D00E7A40A /* UserDefaults.swift in Sources */ = {isa = PBXBuildFile; fileRef = E339B3B72449F10D00E7A40A /* UserDefaults.swift */; };
+		E339B3BB2449F10D00E7A40A /* UserDefaults.swift in Sources */ = {isa = PBXBuildFile; fileRef = E339B3B72449F10D00E7A40A /* UserDefaults.swift */; };
 		E3EB3E33216505920033B089 /* util.swift in Sources */ = {isa = PBXBuildFile; fileRef = E3EB3E32216505920033B089 /* util.swift */; };
 		E3EB3E35216507AE0033B089 /* Observation.swift in Sources */ = {isa = PBXBuildFile; fileRef = E3EB3E34216507AE0033B089 /* Observation.swift */; };
 		E3EB3E36216507B50033B089 /* Observation.swift in Sources */ = {isa = PBXBuildFile; fileRef = E3EB3E34216507AE0033B089 /* Observation.swift */; };
@@ -69,6 +77,8 @@
 		DD75027A1C68FCFC006590AF /* Defaults-macOS Tests.xctest */ = {isa = PBXFileReference; explicitFileType = wrapper.cfbundle; includeInIndex = 0; path = "Defaults-macOS Tests.xctest"; sourceTree = BUILT_PRODUCTS_DIR; };
 		DD75028D1C690C7A006590AF /* Defaults-tvOS Tests.xctest */ = {isa = PBXFileReference; explicitFileType = wrapper.cfbundle; includeInIndex = 0; path = "Defaults-tvOS Tests.xctest"; sourceTree = BUILT_PRODUCTS_DIR; };
 		E286D0C623B8D51100570D1E /* Observation+Combine.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; lineEnding = 0; path = "Observation+Combine.swift"; sourceTree = "<group>"; usesTabs = 1; };
+		E339B3B22449ED2000E7A40A /* Reset.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; lineEnding = 0; path = Reset.swift; sourceTree = "<group>"; usesTabs = 1; };
+		E339B3B72449F10D00E7A40A /* UserDefaults.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; lineEnding = 0; path = UserDefaults.swift; sourceTree = "<group>"; usesTabs = 1; };
 		E3EB3E32216505920033B089 /* util.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; lineEnding = 0; path = util.swift; sourceTree = "<group>"; usesTabs = 1; };
 		E3EB3E34216507AE0033B089 /* Observation.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; lineEnding = 0; path = Observation.swift; sourceTree = "<group>"; usesTabs = 1; };
 /* End PBXFileReference section */
@@ -201,6 +211,8 @@
 			isa = PBXGroup;
 			children = (
 				8933C7841EB5B820000D00A4 /* Defaults.swift */,
+				E339B3B72449F10D00E7A40A /* UserDefaults.swift */,
+				E339B3B22449ED2000E7A40A /* Reset.swift */,
 				E3EB3E34216507AE0033B089 /* Observation.swift */,
 				E286D0C623B8D51100570D1E /* Observation+Combine.swift */,
 				E3EB3E32216505920033B089 /* util.swift */,
@@ -491,8 +503,10 @@
 			files = (
 				E286D0C823B8D54C00570D1E /* Observation+Combine.swift in Sources */,
 				8933C7851EB5B820000D00A4 /* Defaults.swift in Sources */,
+				E339B3B92449F10D00E7A40A /* UserDefaults.swift in Sources */,
 				E3EB3E35216507AE0033B089 /* Observation.swift in Sources */,
 				E3EB3E33216505920033B089 /* util.swift in Sources */,
+				E339B3B42449ED2000E7A40A /* Reset.swift in Sources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};
@@ -510,8 +524,10 @@
 			files = (
 				E286D0CA23B8D54E00570D1E /* Observation+Combine.swift in Sources */,
 				E3EB3E3A216507C40033B089 /* util.swift in Sources */,
+				E339B3BB2449F10D00E7A40A /* UserDefaults.swift in Sources */,
 				E3EB3E37216507B50033B089 /* Observation.swift in Sources */,
 				8933C7871EB5B820000D00A4 /* Defaults.swift in Sources */,
+				E339B3B62449ED2000E7A40A /* Reset.swift in Sources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};
@@ -521,8 +537,10 @@
 			files = (
 				E286D0C923B8D54D00570D1E /* Observation+Combine.swift in Sources */,
 				E3EB3E3B216507C40033B089 /* util.swift in Sources */,
+				E339B3BA2449F10D00E7A40A /* UserDefaults.swift in Sources */,
 				E3EB3E38216507B60033B089 /* Observation.swift in Sources */,
 				8933C7881EB5B820000D00A4 /* Defaults.swift in Sources */,
+				E339B3B52449ED2000E7A40A /* Reset.swift in Sources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};
@@ -532,8 +550,10 @@
 			files = (
 				E286D0C723B8D51100570D1E /* Observation+Combine.swift in Sources */,
 				E3EB3E39216507C30033B089 /* util.swift in Sources */,
+				E339B3B82449F10D00E7A40A /* UserDefaults.swift in Sources */,
 				E3EB3E36216507B50033B089 /* Observation.swift in Sources */,
 				8933C7861EB5B820000D00A4 /* Defaults.swift in Sources */,
+				E339B3B32449ED2000E7A40A /* Reset.swift in Sources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};

Defaults.xcodeproj/xcshareddata/xcschemes/Defaults-macOS.xcscheme

@@ -26,20 +26,8 @@
       buildConfiguration = "Debug"
       selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
       selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
-      codeCoverageEnabled = "YES"
+      shouldUseLaunchSchemeArgsEnv = "YES"
-      shouldUseLaunchSchemeArgsEnv = "YES">
+      codeCoverageEnabled = "YES">
-      <Testables>
-         <TestableReference
-            skipped = "NO">
-            <BuildableReference
-               BuildableIdentifier = "primary"
-               BlueprintIdentifier = "DD7502791C68FCFC006590AF"
-               BuildableName = "Defaults-macOS Tests.xctest"
-               BlueprintName = "Defaults-macOS Tests"
-               ReferencedContainer = "container:Defaults.xcodeproj">
-            </BuildableReference>
-         </TestableReference>
-      </Testables>
       <MacroExpansion>
          <BuildableReference
             BuildableIdentifier = "primary"
@@ -49,8 +37,20 @@
             ReferencedContainer = "container:Defaults.xcodeproj">
          </BuildableReference>
       </MacroExpansion>
-      <AdditionalOptions>
+      <Testables>
-      </AdditionalOptions>
+         <TestableReference
+            skipped = "NO"
+            parallelizable = "YES"
+            testExecutionOrdering = "random">
+            <BuildableReference
+               BuildableIdentifier = "primary"
+               BlueprintIdentifier = "DD7502791C68FCFC006590AF"
+               BuildableName = "Defaults-macOS Tests.xctest"
+               BlueprintName = "Defaults-macOS Tests"
+               ReferencedContainer = "container:Defaults.xcodeproj">
+            </BuildableReference>
+         </TestableReference>
+      </Testables>
    </TestAction>
    <LaunchAction
       buildConfiguration = "Debug"
@@ -71,8 +71,6 @@
             ReferencedContainer = "container:Defaults.xcodeproj">
          </BuildableReference>
       </MacroExpansion>
-      <AdditionalOptions>
-      </AdditionalOptions>
    </LaunchAction>
    <ProfileAction
       buildConfiguration = "Release"

Sources/Defaults/Defaults.swift

@@ -1,6 +1,18 @@
 // MIT License © Sindre Sorhus
 import Foundation
 
+public protocol _DefaultsBaseKey: Defaults.Keys {
+	var name: String { get }
+	var suite: UserDefaults { get }
+}
+
+extension _DefaultsBaseKey {
+	/// Reset the item back to its default value.
+	public func reset() {
+		suite.removeObject(forKey: name)
+	}
+}
+
 public enum Defaults {
 	public class Keys {
 		public typealias Key = Defaults.Key
@@ -14,7 +26,7 @@ public enum Defaults {
 		fileprivate init() {}
 	}
 
-	public final class Key<Value: Codable>: Keys {
+	public final class Key<Value: Codable>: Keys, _DefaultsBaseKey {
 		public let name: String
 		public let defaultValue: Value
 		public let suite: UserDefaults
@@ -41,7 +53,7 @@ public enum Defaults {
 	}
 
 	@available(iOS 11.0, macOS 10.13, tvOS 11.0, watchOS 4.0, iOSApplicationExtension 11.0, macOSApplicationExtension 10.13, tvOSApplicationExtension 11.0, watchOSApplicationExtension 4.0, *)
-	public final class NSSecureCodingKey<Value: NSSecureCoding>: Keys {
+	public final class NSSecureCodingKey<Value: NSSecureCoding>: Keys, _DefaultsBaseKey {
 		public let name: String
 		public let defaultValue: Value
 		public let suite: UserDefaults
@@ -68,7 +80,7 @@ public enum Defaults {
 	}
 
 	@available(iOS 11.0, macOS 10.13, tvOS 11.0, watchOS 4.0, iOSApplicationExtension 11.0, macOSApplicationExtension 10.13, tvOSApplicationExtension 11.0, watchOSApplicationExtension 4.0, *)
-	public final class NSSecureCodingOptionalKey<Value: NSSecureCoding>: Keys {
+	public final class NSSecureCodingOptionalKey<Value: NSSecureCoding>: Keys, _DefaultsBaseKey {
 		public let name: String
 		public let suite: UserDefaults
 
@@ -104,108 +116,11 @@ public enum Defaults {
 			key.suite[key] = newValue
 		}
 	}
+}
 
+extension Defaults {
 	/**
-	Reset the given keys back to their default values.
+	Remove all entries from the given `UserDefaults` suite.
-
-	- Parameter keys: Keys to reset.
-	- Parameter suite: `UserDefaults` suite.
-
-	```
-	extension Defaults.Keys {
-		static let isUnicornMode = Key<Bool>("isUnicornMode", default: false)
-	}
-
-	Defaults[.isUnicornMode] = true
-	//=> true
-
-	Defaults.reset(.isUnicornMode)
-
-	Defaults[.isUnicornMode]
-	//=> false
-	```
-	*/
-	public static func reset<Value: Codable>(_ keys: Key<Value>..., suite: UserDefaults = .standard) {
-		reset(keys, suite: suite)
-	}
-
-	/**
-	Reset the given keys back to their default values.
-
-	- Parameter keys: Keys to reset.
-	- Parameter suite: `UserDefaults` suite.
-	*/
-	@available(iOS 11.0, macOS 10.13, tvOS 11.0, watchOS 4.0, iOSApplicationExtension 11.0, macOSApplicationExtension 10.13, tvOSApplicationExtension 11.0, watchOSApplicationExtension 4.0, *)
-	public static func reset<Value: NSSecureCoding>(_ keys: NSSecureCodingKey<Value>..., suite: UserDefaults = .standard) {
-		reset(keys, suite: suite)
-	}
-	
-	/**
-	Reset the given array of keys back to their default values.
-
-	- Parameter keys: Keys to reset.
-	- Parameter suite: `UserDefaults` suite.
-
-	```
-	extension Defaults.Keys {
-		static let isUnicornMode = Key<Bool>("isUnicornMode", default: false)
-	}
-
-	Defaults[.isUnicornMode] = true
-	//=> true
-
-	Defaults.reset(.isUnicornMode)
-
-	Defaults[.isUnicornMode]
-	//=> false
-	```
-	*/
-	public static func reset<Value: Codable>(_ keys: [Key<Value>], suite: UserDefaults = .standard) {
-		for key in keys {
-			key.suite[key] = key.defaultValue
-		}
-	}
-
-	/**
-	Reset the given array of keys back to their default values.
-
-	- Parameter keys: Keys to reset.
-	- Parameter suite: `UserDefaults` suite.
-	*/
-	@available(iOS 11.0, macOS 10.13, tvOS 11.0, watchOS 4.0, iOSApplicationExtension 11.0, macOSApplicationExtension 10.13, tvOSApplicationExtension 11.0, watchOSApplicationExtension 4.0, *)
-	public static func reset<Value: NSSecureCoding>(_ keys: [NSSecureCodingKey<Value>], suite: UserDefaults = .standard) {
-		for key in keys {
-			key.suite[key] = key.defaultValue
-		}
-	}
-
-	/**
-	Reset the given optional keys back to `nil`.
-
-	- Parameter keys: Keys to reset.
-	- Parameter suite: `UserDefaults` suite.
-	```
-	*/
-	@available(iOS 11.0, macOS 10.13, tvOS 11.0, watchOS 4.0, iOSApplicationExtension 11.0, macOSApplicationExtension 10.13, tvOSApplicationExtension 11.0, watchOSApplicationExtension 4.0, *)
-	public static func reset<Value: NSSecureCoding>(_ keys: NSSecureCodingOptionalKey<Value>..., suite: UserDefaults = .standard) {
-		reset(keys, suite: suite)
-	}
-
-	/**
-	Reset the given array of optional keys back to `nil`.
-
-	- Parameter keys: Keys to reset.
-	- Parameter suite: `UserDefaults` suite.
-	*/
-	@available(iOS 11.0, macOS 10.13, tvOS 11.0, watchOS 4.0, iOSApplicationExtension 11.0, macOSApplicationExtension 10.13, tvOSApplicationExtension 11.0, watchOSApplicationExtension 4.0, *)
-	public static func reset<Value: NSSecureCoding>(_ keys: [NSSecureCodingOptionalKey<Value>], suite: UserDefaults = .standard) {
-		for key in keys {
-			key.suite[key] = nil
-		}
-	}
-
-	/**
-	Remove all entries from the `UserDefaults` suite.
 	*/
 	public static func removeAll(suite: UserDefaults = .standard) {
 		for key in suite.dictionaryRepresentation().keys {
@@ -226,136 +141,3 @@ extension Defaults.NSSecureCodingKey where Value: _DefaultsOptionalType {
 		self.init(key, default: nil, suite: suite)
 	}
 }
-
-extension UserDefaults {
-	private func _get<Value: Codable>(_ key: String) -> Value? {
-		if UserDefaults.isNativelySupportedType(Value.self) {
-			return object(forKey: key) as? Value
-		}
-
-		guard
-			let text = string(forKey: key),
-			let data = "[\(text)]".data(using: .utf8)
-		else {
-			return nil
-		}
-
-		do {
-			return (try JSONDecoder().decode([Value].self, from: data)).first
-		} catch {
-			print(error)
-		}
-
-		return nil
-	}
-
-	@available(iOS 11.0, macOS 10.13, tvOS 11.0, watchOS 4.0, iOSApplicationExtension 11.0, macOSApplicationExtension 10.13, tvOSApplicationExtension 11.0, watchOSApplicationExtension 4.0, *)
-	private func _get<Value: NSSecureCoding>(_ key: String) -> Value? {
-		if UserDefaults.isNativelySupportedType(Value.self) {
-			return object(forKey: key) as? Value
-		}
-
-		guard
-			let data = data(forKey: key)
-		else {
-			return nil
-		}
-
-		do {
-			return try NSKeyedUnarchiver.unarchiveTopLevelObjectWithData(data) as? Value
-		} catch {
-			print(error)
-		}
-
-		return nil
-	}
-
-	fileprivate func _encode<Value: Codable>(_ value: Value) -> String? {
-		do {
-			// Some codable values like URL and enum are encoded as a top-level
-			// string which JSON can't handle, so we need to wrap it in an array
-			// We need this: https://forums.swift.org/t/allowing-top-level-fragments-in-jsondecoder/11750
-			let data = try JSONEncoder().encode([value])
-			return String(String(data: data, encoding: .utf8)!.dropFirst().dropLast())
-		} catch {
-			print(error)
-			return nil
-		}
-	}
-
-	private func _set<Value: Codable>(_ key: String, to value: Value) {
-		if (value as? _DefaultsOptionalType)?.isNil == true {
-			removeObject(forKey: key)
-			return
-		}
-
-		if UserDefaults.isNativelySupportedType(Value.self) {
-			set(value, forKey: key)
-			return
-		}
-
-		set(_encode(value), forKey: key)
-	}
-
-	@available(iOS 11.0, macOS 10.13, tvOS 11.0, watchOS 4.0, iOSApplicationExtension 11.0, macOSApplicationExtension 10.13, tvOSApplicationExtension 11.0, watchOSApplicationExtension 4.0, *)
-	private func _set<Value: NSSecureCoding>(_ key: String, to value: Value) {
-		// TODO: Handle nil here too.
-		if UserDefaults.isNativelySupportedType(Value.self) {
-			set(value, forKey: key)
-			return
-		}
-
-		set(try? NSKeyedArchiver.archivedData(withRootObject: value, requiringSecureCoding: true), forKey: key)
-	}
-
-	public subscript<Value: Codable>(key: Defaults.Key<Value>) -> Value {
-		get { _get(key.name) ?? key.defaultValue }
-		set {
-			_set(key.name, to: newValue)
-		}
-	}
-
-	@available(iOS 11.0, macOS 10.13, tvOS 11.0, watchOS 4.0, iOSApplicationExtension 11.0, macOSApplicationExtension 10.13, tvOSApplicationExtension 11.0, watchOSApplicationExtension 4.0, *)
-	public subscript<Value: NSSecureCoding>(key: Defaults.NSSecureCodingKey<Value>) -> Value {
-		get { _get(key.name) ?? key.defaultValue }
-		set {
-			_set(key.name, to: newValue)
-		}
-	}
-
-	@available(iOS 11.0, macOS 10.13, tvOS 11.0, watchOS 4.0, iOSApplicationExtension 11.0, macOSApplicationExtension 10.13, tvOSApplicationExtension 11.0, watchOSApplicationExtension 4.0, *)
-	public subscript<Value: NSSecureCoding>(key: Defaults.NSSecureCodingOptionalKey<Value>) -> Value? {
-		get { _get(key.name) }
-		set {
-			guard let value = newValue else {
-				set(nil, forKey: key.name)
-				return
-			}
-
-			_set(key.name, to: value)
-		}
-	}
-
-	fileprivate static func isNativelySupportedType<T>(_ type: T.Type) -> Bool {
-		switch type {
-		case
-			is Bool.Type,
-			is Bool?.Type, // swiftlint:disable:this discouraged_optional_boolean
-			is String.Type,
-			is String?.Type,
-			is Int.Type,
-			is Int?.Type,
-			is Double.Type,
-			is Double?.Type,
-			is Float.Type,
-			is Float?.Type,
-			is Date.Type,
-			is Date?.Type,
-			is Data.Type,
-			is Data?.Type:
-			return true
-		default:
-			return false
-		}
-	}
-}

Sources/Defaults/Observation+Combine.swift

@@ -155,7 +155,7 @@ extension Defaults {
 	*/
 	@available(iOS 13.0, macOS 10.15, tvOS 13.0, watchOS 6.0, iOSApplicationExtension 13.0, macOSApplicationExtension 10.15, tvOSApplicationExtension 13.0, watchOSApplicationExtension 6.0, *)
 	public static func publisher<Value: NSSecureCoding>(
-		keys: Defaults.NSSecureCodingKey<Value>...,
+		keys: NSSecureCodingKey<Value>...,
 		options: ObservationOptions = [.initial]
 	) -> AnyPublisher<Void, Never> {
 		let initial = Empty<Void, Never>(completeImmediately: false).eraseToAnyPublisher()
@@ -177,7 +177,7 @@ extension Defaults {
 	*/
 	@available(iOS 13.0, macOS 10.15, tvOS 13.0, watchOS 6.0, iOSApplicationExtension 13.0, macOSApplicationExtension 10.15, tvOSApplicationExtension 13.0, watchOSApplicationExtension 6.0, *)
 	public static func publisher<Value: NSSecureCoding>(
-		keys: Defaults.NSSecureCodingOptionalKey<Value>...,
+		keys: NSSecureCodingOptionalKey<Value>...,
 		options: ObservationOptions = [.initial]
 	) -> AnyPublisher<Void, Never> {
 		let initial = Empty<Void, Never>(completeImmediately: false).eraseToAnyPublisher()

Sources/Defaults/Observation.swift

@@ -226,7 +226,7 @@ extension Defaults {
 	) -> Observation {
 		let observation = UserDefaultsKeyObservation(object: key.suite, key: key.name) { change in
 			handler(
-				KeyChange<Value>(change: change, defaultValue: key.defaultValue)
+				KeyChange(change: change, defaultValue: key.defaultValue)
 			)
 		}
 		observation.start(options: options)
@@ -244,7 +244,7 @@ extension Defaults {
 	) -> Observation {
 		let observation = UserDefaultsKeyObservation(object: key.suite, key: key.name) { change in
 			handler(
-				NSSecureCodingKeyChange<Value>(change: change, defaultValue: key.defaultValue)
+				NSSecureCodingKeyChange(change: change, defaultValue: key.defaultValue)
 			)
 		}
 		observation.start(options: options)
@@ -262,7 +262,7 @@ extension Defaults {
 	) -> Observation {
 		let observation = UserDefaultsKeyObservation(object: key.suite, key: key.name) { change in
 			handler(
-				NSSecureCodingOptionalKeyChange<Value>(change: change)
+				NSSecureCodingOptionalKeyChange(change: change)
 			)
 		}
 		observation.start(options: options)

Sources/Defaults/UserDefaults.swift

@@ -0,0 +1,134 @@
+import Foundation
+
+extension UserDefaults {
+	private func _get<Value: Codable>(_ key: String) -> Value? {
+		if UserDefaults.isNativelySupportedType(Value.self) {
+			return object(forKey: key) as? Value
+		}
+
+		guard
+			let text = string(forKey: key),
+			let data = "[\(text)]".data(using: .utf8)
+		else {
+			return nil
+		}
+
+		do {
+			return (try JSONDecoder().decode([Value].self, from: data)).first
+		} catch {
+			print(error)
+		}
+
+		return nil
+	}
+
+	@available(iOS 11.0, macOS 10.13, tvOS 11.0, watchOS 4.0, iOSApplicationExtension 11.0, macOSApplicationExtension 10.13, tvOSApplicationExtension 11.0, watchOSApplicationExtension 4.0, *)
+	private func _get<Value: NSSecureCoding>(_ key: String) -> Value? {
+		if UserDefaults.isNativelySupportedType(Value.self) {
+			return object(forKey: key) as? Value
+		}
+
+		guard
+			let data = data(forKey: key)
+		else {
+			return nil
+		}
+
+		do {
+			return try NSKeyedUnarchiver.unarchiveTopLevelObjectWithData(data) as? Value
+		} catch {
+			print(error)
+		}
+
+		return nil
+	}
+
+	func _encode<Value: Codable>(_ value: Value) -> String? {
+		do {
+			// Some codable values like URL and enum are encoded as a top-level
+			// string which JSON can't handle, so we need to wrap it in an array
+			// We need this: https://forums.swift.org/t/allowing-top-level-fragments-in-jsondecoder/11750
+			let data = try JSONEncoder().encode([value])
+			return String(String(data: data, encoding: .utf8)!.dropFirst().dropLast())
+		} catch {
+			print(error)
+			return nil
+		}
+	}
+
+	private func _set<Value: Codable>(_ key: String, to value: Value) {
+		if (value as? _DefaultsOptionalType)?.isNil == true {
+			removeObject(forKey: key)
+			return
+		}
+
+		if UserDefaults.isNativelySupportedType(Value.self) {
+			set(value, forKey: key)
+			return
+		}
+
+		set(_encode(value), forKey: key)
+	}
+
+	@available(iOS 11.0, macOS 10.13, tvOS 11.0, watchOS 4.0, iOSApplicationExtension 11.0, macOSApplicationExtension 10.13, tvOSApplicationExtension 11.0, watchOSApplicationExtension 4.0, *)
+	private func _set<Value: NSSecureCoding>(_ key: String, to value: Value) {
+		// TODO: Handle nil here too.
+		if UserDefaults.isNativelySupportedType(Value.self) {
+			set(value, forKey: key)
+			return
+		}
+
+		set(try? NSKeyedArchiver.archivedData(withRootObject: value, requiringSecureCoding: true), forKey: key)
+	}
+
+	public subscript<Value: Codable>(key: Defaults.Key<Value>) -> Value {
+		get { _get(key.name) ?? key.defaultValue }
+		set {
+			_set(key.name, to: newValue)
+		}
+	}
+
+	@available(iOS 11.0, macOS 10.13, tvOS 11.0, watchOS 4.0, iOSApplicationExtension 11.0, macOSApplicationExtension 10.13, tvOSApplicationExtension 11.0, watchOSApplicationExtension 4.0, *)
+	public subscript<Value: NSSecureCoding>(key: Defaults.NSSecureCodingKey<Value>) -> Value {
+		get { _get(key.name) ?? key.defaultValue }
+		set {
+			_set(key.name, to: newValue)
+		}
+	}
+
+	@available(iOS 11.0, macOS 10.13, tvOS 11.0, watchOS 4.0, iOSApplicationExtension 11.0, macOSApplicationExtension 10.13, tvOSApplicationExtension 11.0, watchOSApplicationExtension 4.0, *)
+	public subscript<Value: NSSecureCoding>(key: Defaults.NSSecureCodingOptionalKey<Value>) -> Value? {
+		get { _get(key.name) }
+		set {
+			guard let value = newValue else {
+				set(nil, forKey: key.name)
+				return
+			}
+
+			_set(key.name, to: value)
+		}
+	}
+
+	static func isNativelySupportedType<T>(_ type: T.Type) -> Bool {
+		switch type {
+		case
+			is Bool.Type,
+			is Bool?.Type, // swiftlint:disable:this discouraged_optional_boolean
+			is String.Type,
+			is String?.Type,
+			is Int.Type,
+			is Int?.Type,
+			is Double.Type,
+			is Double?.Type,
+			is Float.Type,
+			is Float?.Type,
+			is Date.Type,
+			is Date?.Type,
+			is Data.Type,
+			is Data?.Type:
+			return true
+		default:
+			return false
+		}
+	}
+}

Tests/DefaultsTests/DefaultsTests.swift

@@ -509,46 +509,46 @@ final class DefaultsTests: XCTestCase {
 	}
 
 	func testResetKey() {
-		let defaultString1 = "foo1"
+		let defaultFixture1 = "foo1"
-		let defaultString2 = "foo2"
+		let defaultFixture2 = 0
-		let defaultString3 = "foo3"
+		let defaultFixture3 = "foo3"
-		let newString1 = "bar1"
+		let newFixture1 = "bar1"
-		let newString2 = "bar2"
+		let newFixture2 = 1
-		let newString3 = "bar3"
+		let newFixture3 = "bar3"
-		let key1 = Defaults.Key<String>("key1", default: defaultString1)
+		let key1 = Defaults.Key<String>("key1", default: defaultFixture1)
-		let key2 = Defaults.Key<String>("key2", default: defaultString2)
+		let key2 = Defaults.Key<Int>("key2", default: defaultFixture2)
-		Defaults[key1] = newString1
+		Defaults[key1] = newFixture1
-		Defaults[key2] = newString2
+		Defaults[key2] = newFixture2
 		Defaults.reset(key1)
-		XCTAssertEqual(Defaults[key1], defaultString1)
+		XCTAssertEqual(Defaults[key1], defaultFixture1)
-		XCTAssertEqual(Defaults[key2], newString2)
+		XCTAssertEqual(Defaults[key2], newFixture2)
 
 		if #available(iOS 11.0, macOS 10.13, tvOS 11.0, watchOS 4.0, iOSApplicationExtension 11.0, macOSApplicationExtension 10.13, tvOSApplicationExtension 11.0, watchOSApplicationExtension 4.0, *) {
-			let key3 = Defaults.NSSecureCodingKey<ExamplePersistentHistory>("key3", default: ExamplePersistentHistory(value: defaultString3))
+			let key3 = Defaults.NSSecureCodingKey<ExamplePersistentHistory>("key3", default: ExamplePersistentHistory(value: defaultFixture3))
-			Defaults[key3] = ExamplePersistentHistory(value: newString3)
+			Defaults[key3] = ExamplePersistentHistory(value: newFixture3)
 			Defaults.reset(key3)
 
-			XCTAssertEqual(Defaults[key3].value, defaultString3)
+			XCTAssertEqual(Defaults[key3].value, defaultFixture3)
 		}
 	}
 
-	func testResetKeyArray() {
+	func testResetMultipleKeys() {
-		let defaultString1 = "foo1"
+		let defaultFxiture1 = "foo1"
-		let defaultString2 = "foo2"
+		let defaultFixture2 = 0
-		let defaultString3 = "foo3"
+		let defaultFixture3 = "foo3"
-		let newString1 = "bar1"
+		let newFixture1 = "bar1"
-		let newString2 = "bar2"
+		let newFixture2 = 1
-		let newString3 = "bar3"
+		let newFixture3 = "bar3"
-		let key1 = Defaults.Key<String>("akey1", default: defaultString1)
+		let key1 = Defaults.Key<String>("akey1", default: defaultFxiture1)
-		let key2 = Defaults.Key<String>("akey2", default: defaultString2)
+		let key2 = Defaults.Key<Int>("akey2", default: defaultFixture2)
-		let key3 = Defaults.Key<String>("akey3", default: defaultString3)
+		let key3 = Defaults.Key<String>("akey3", default: defaultFixture3)
-		Defaults[key1] = newString1
+		Defaults[key1] = newFixture1
-		Defaults[key2] = newString2
+		Defaults[key2] = newFixture2
-		Defaults[key3] = newString3
+		Defaults[key3] = newFixture3
 		Defaults.reset(key1, key2)
-		XCTAssertEqual(Defaults[key1], defaultString1)
+		XCTAssertEqual(Defaults[key1], defaultFxiture1)
-		XCTAssertEqual(Defaults[key2], defaultString2)
+		XCTAssertEqual(Defaults[key2], defaultFixture2)
-		XCTAssertEqual(Defaults[key3], newString3)
+		XCTAssertEqual(Defaults[key3], newFixture3)
 	}
 
 	func testResetOptionalKey() {
@@ -571,20 +571,20 @@ final class DefaultsTests: XCTestCase {
 		}
 	}
 
-	func testResetOptionalKeyArray() {
+	func testResetMultipleOptionalKeys() {
-		let newString1 = "bar1"
+		let newFixture1 = "bar1"
-		let newString2 = "bar2"
+		let newFixture2 = 1
-		let newString3 = "bar3"
+		let newFixture3 = "bar3"
 		let key1 = Defaults.Key<String?>("aoptionalKey1")
-		let key2 = Defaults.Key<String?>("aoptionalKey2")
+		let key2 = Defaults.Key<Int?>("aoptionalKey2")
 		let key3 = Defaults.Key<String?>("aoptionalKey3")
-		Defaults[key1] = newString1
+		Defaults[key1] = newFixture1
-		Defaults[key2] = newString2
+		Defaults[key2] = newFixture2
-		Defaults[key3] = newString3
+		Defaults[key3] = newFixture3
 		Defaults.reset(key1, key2)
 		XCTAssertEqual(Defaults[key1], nil)
 		XCTAssertEqual(Defaults[key2], nil)
-		XCTAssertEqual(Defaults[key3], newString3)
+		XCTAssertEqual(Defaults[key3], newFixture3)
 	}
 
 	func testObserveWithLifetimeTie() {

readme.md

@@ -318,22 +318,16 @@ Type: `class`
 
 Create a NSSecureCoding key with an optional value.
 
-#### `Defaults.reset`
+#### `Defaults.reset(key, …)`
-
-```swift
-Defaults.reset<T: Codable>(_ keys: Defaults.Key<T>..., suite: UserDefaults = .standard)
-Defaults.reset<T: Codable>(_ keys: [Defaults.Key<T>], suite: UserDefaults = .standard)
-
-Defaults.reset<T: Codable>(_ keys: Defaults.NSSecureCodingKey<T>..., suite: UserDefaults = .standard)
-Defaults.reset<T: Codable>(_ keys: [Defaults.NSSecureCodingKey<T>], suite: UserDefaults = .standard)
-Defaults.reset<T: Codable>(_ keys: Defaults.NSSecureCodingOptionalKey<T>..., suite: UserDefaults = .standard)
-Defaults.reset<T: Codable>(_ keys: [Defaults.NSSecureCodingOptionalKey<T>], suite: UserDefaults = .standard)
-```
 
 Type: `func`
 
 Reset the given keys back to their default values.
 
+You can specify up to 10 keys. If you need to specify more, call this method multiple times.
+
+You can also specify string keys, which can be useful if you need to store some keys in a collection, as it's not possible to store `Defaults.Key` in a collection because it's generic.
+
 #### `Defaults.observe`
 
 ```swift
@@ -444,7 +438,7 @@ Defaults.removeAll(suite: UserDefaults = .standard)
 
 Type: `func`
 
-Remove all entries from the `UserDefaults` suite.
+Remove all entries from the given `UserDefaults` suite.
 
 ### `Defaults.Observation`