Encode keyed containers

.gitignore

@@ -0,0 +1 @@
+/MsgPack/JSON.swift

MsgPack.xcodeproj/project.pbxproj

@@ -7,12 +7,12 @@
 	objects = {
 
 /* Begin PBXBuildFile section */
+		7495EA251F30B393000EBDF6 /* Encoder.swift in Sources */ = {isa = PBXBuildFile; fileRef = 74FA3B621F2C9096005CE521 /* Encoder.swift */; };
 		74A1AE171F2E3E8300B139A3 /* Format.swift in Sources */ = {isa = PBXBuildFile; fileRef = 74A1AE161F2E3E8300B139A3 /* Format.swift */; };
 		74FA3B501F2C9060005CE521 /* MsgPack.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 74FA3B461F2C9060005CE521 /* MsgPack.framework */; };
 		74FA3B551F2C9060005CE521 /* MsgPackTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = 74FA3B541F2C9060005CE521 /* MsgPackTests.swift */; };
 		74FA3B571F2C9060005CE521 /* MsgPack.h in Headers */ = {isa = PBXBuildFile; fileRef = 74FA3B491F2C9060005CE521 /* MsgPack.h */; settings = {ATTRIBUTES = (Public, ); }; };
 		74FA3B611F2C908D005CE521 /* DecoderHelper.swift in Sources */ = {isa = PBXBuildFile; fileRef = 74FA3B601F2C908D005CE521 /* DecoderHelper.swift */; };
-		74FA3B631F2C9096005CE521 /* Encoder.swift in Sources */ = {isa = PBXBuildFile; fileRef = 74FA3B621F2C9096005CE521 /* Encoder.swift */; };
 /* End PBXBuildFile section */
 
 /* Begin PBXContainerItemProxy section */
@@ -27,6 +27,7 @@
 
 /* Begin PBXFileReference section */
 		74A1AE161F2E3E8300B139A3 /* Format.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = Format.swift; sourceTree = "<group>"; };
+		74A426DB1F30774F001BE9C4 /* JSON.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = JSON.swift; sourceTree = "<group>"; };
 		74FA3B461F2C9060005CE521 /* MsgPack.framework */ = {isa = PBXFileReference; explicitFileType = wrapper.framework; includeInIndex = 0; path = MsgPack.framework; sourceTree = BUILT_PRODUCTS_DIR; };
 		74FA3B491F2C9060005CE521 /* MsgPack.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = MsgPack.h; sourceTree = "<group>"; };
 		74FA3B4A1F2C9060005CE521 /* Info.plist */ = {isa = PBXFileReference; lastKnownFileType = text.plist.xml; path = Info.plist; sourceTree = "<group>"; };
@@ -82,6 +83,7 @@
 				74FA3B621F2C9096005CE521 /* Encoder.swift */,
 				74A1AE161F2E3E8300B139A3 /* Format.swift */,
 				74FA3B4A1F2C9060005CE521 /* Info.plist */,
+				74A426DB1F30774F001BE9C4 /* JSON.swift */,
 			);
 			path = MsgPack;
 			sourceTree = "<group>";
@@ -204,7 +206,7 @@
 			isa = PBXSourcesBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
-				74FA3B631F2C9096005CE521 /* Encoder.swift in Sources */,
+				7495EA251F30B393000EBDF6 /* Encoder.swift in Sources */,
 				74A1AE171F2E3E8300B139A3 /* Format.swift in Sources */,
 				74FA3B611F2C908D005CE521 /* DecoderHelper.swift in Sources */,
 			);
@@ -353,7 +355,7 @@
 				DYLIB_CURRENT_VERSION = 1;
 				DYLIB_INSTALL_NAME_BASE = "@rpath";
 				FRAMEWORK_VERSION = A;
-				GCC_OPTIMIZATION_LEVEL = fast;
+				GCC_OPTIMIZATION_LEVEL = 0;
 				INFOPLIST_FILE = MsgPack/Info.plist;
 				INSTALL_PATH = "$(LOCAL_LIBRARY_DIR)/Frameworks";
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/../Frameworks @loader_path/Frameworks";

MsgPack/Encoder.swift

@@ -9,26 +9,29 @@
 import Foundation
 
 public class Encoder {
-	let serialiser = Serialiser()
+	let intermediate = IntermediateEncoder()
 	
 	public init() {}
 	
 	public func encode<T : Encodable>(_ value: T) throws -> Data {
-		try value.encode(to: serialiser)
+		try value.encode(to: intermediate)
 		var data = Data()
-		try serialiser.storage?.appendTo(data: &data)
+		try intermediate.container?.getFormat().appendTo(data: &data)
 		return data
 	}
 }
 
-class Serialiser: Swift.Encoder {
+class IntermediateEncoder: Swift.Encoder {
+	
 	var codingPath = [CodingKey]()
 	var userInfo = [CodingUserInfoKey : Any]()
 	
-	var storage: Format?
+	var container: MessagePackEncodingContainer?
 	
 	func container<Key>(keyedBy type: Key.Type) -> KeyedEncodingContainer<Key> where Key : CodingKey {
-		preconditionFailure()
+		let keyedContainer = MsgPackKeyedEncodingContainer<Key>()
+		container = keyedContainer
+		return KeyedEncodingContainer(keyedContainer)
 	}
 	
 	func unkeyedContainer() -> UnkeyedEncodingContainer {
@@ -36,13 +39,82 @@ class Serialiser: Swift.Encoder {
 	}
 	
 	func singleValueContainer() -> SingleValueEncodingContainer {
-		return self
+		let singleValueContainer = MsgPackSingleValueEncodingContainer()
+		container = singleValueContainer
+		return singleValueContainer
 	}
 }
 
-extension MsgPack.Serialiser: SingleValueEncodingContainer {
+extension Format {
+	static func from(string: String) throws -> Format {
+		guard let data = string.data(using: .utf8) else {throw MsgPackEncodingError.stringNotConvertibleToUTF8(string)}
+		switch data.count {
+		case 1..<32:
+			return .fixString(data)
+		case 32..<256:
+			return .string8(data)
+		case 256..<65536:
+			return .string16(data)
+		default:
+			return .string32(data)
+		}
+	}
+	
+	static func from(keyValuePairs: [(Format, Format)]) -> Format {
+		switch keyValuePairs.count {
+		case 1..<16:
+			return .fixMap(keyValuePairs)
+		case 16..<65536:
+			return .map16(keyValuePairs)
+		default:
+			return .map32(keyValuePairs)
+		}
+	}
+	
+	static func from(int: Int) -> Format {
+		#if arch(arm) || arch(i386)
+			return .int32(Int32(int))
+		#else
+			return .int64(Int64(int))
+		#endif
+	}
+	
+	static func from(uInt: UInt) -> Format {
+		#if arch(arm) || arch(i386)
+			return .uInt32(UInt32(uInt))
+		#else
+			return .uInt64(UInt64(uInt))
+		#endif
+	}
+}
+
+class MessagePackEncodingContainer {
+	var codingPath: [CodingKey] = []
+	
+	func getFormat() throws -> Format {
+		preconditionFailure()
+	}
+}
+
+enum MsgPackEncodingError: Swift.Error {
+	case notImplemented, stringNotConvertibleToUTF8(String)
+}
+
+class MsgPackSingleValueEncodingContainer: MessagePackEncodingContainer, SingleValueEncodingContainer {
+	
+	var storage: Format?
+	
 	enum Error: Swift.Error {
-		case notImplemented, stringNotConvertibleToUTF8
+		case noValue
+	}
+	
+	override func getFormat() throws -> Format {
+		guard let format = storage else {throw Error.noValue}
+		return format
+	}
+
+	init(with storage: Format? = nil) {
+		self.storage = storage
 	}
 	
 	func encodeNil() throws {
@@ -54,11 +126,7 @@ extension MsgPack.Serialiser: SingleValueEncodingContainer {
 	}
 
 	func encode(_ value: Int) throws {
-		#if arch(arm) || arch(i386)
+		storage = .from(int: value)
-			storage = .int32(Int32(value))
-		#else
-			storage = .int64(Int64(value))
-		#endif
 	}
 
 	func encode(_ value: Int8) throws {
@@ -78,11 +146,7 @@ extension MsgPack.Serialiser: SingleValueEncodingContainer {
 	}
 
 	func encode(_ value: UInt) throws {
-		#if arch(arm) || arch(i386)
+		storage = .from(uInt: value)
-			storage = .uInt32(UInt32(value))
-		#else
-			storage = .uInt64(UInt64(value))
-		#endif
 	}
 
 	func encode(_ value: UInt8) throws {
@@ -110,20 +174,104 @@ extension MsgPack.Serialiser: SingleValueEncodingContainer {
 	}
 
 	func encode(_ value: String) throws {
-		guard let data = value.data(using: .utf8) else {throw Error.stringNotConvertibleToUTF8}
+		storage = try .from(string: value)
-		switch data.count {
-		case 1..<32:
-			storage = .fixString(data)
-		case 32..<256:
-			storage = .string8(data)
-		case 256..<65536:
-			storage = .string16(data)
-		default:
-			storage = .string32(data)
-		}
 	}
 
 	func encode<T : Encodable>(_ value: T) throws {
-		throw Error.notImplemented
+		throw MsgPackEncodingError.notImplemented
+	}
+}
+
+class MsgPackKeyedEncodingContainer<K: CodingKey>: MessagePackEncodingContainer, KeyedEncodingContainerProtocol {
+	var userInfo = [CodingUserInfoKey : Any]()
+
+	var storage = [String: MessagePackEncodingContainer]()
+	
+	override func getFormat() throws -> Format {
+		return try Format.from(keyValuePairs: storage.map {
+			(try Format.from(string: $0.key), try $0.value.getFormat())
+		})
+	}
+
+	func encodeNil(forKey key: K) throws {
+		storage[key.stringValue] = MsgPackSingleValueEncodingContainer(with: .nil)
+	}
+	
+	func encode(_ value: Bool, forKey key: K) throws {
+		storage[key.stringValue] = MsgPackSingleValueEncodingContainer(with: .boolean(value) )
+	}
+	
+	func encode(_ value: Int, forKey key: K) throws {
+		storage[key.stringValue] = MsgPackSingleValueEncodingContainer(with: .from(int: value) )
+	}
+	
+	func encode(_ value: Int8, forKey key: K) throws {
+		storage[key.stringValue] = MsgPackSingleValueEncodingContainer(with: .int8(value) )
+	}
+	
+	func encode(_ value: Int16, forKey key: K) throws {
+		storage[key.stringValue] = MsgPackSingleValueEncodingContainer(with: .int16(value) )
+	}
+	
+	func encode(_ value: Int32, forKey key: K) throws {
+		storage[key.stringValue] = MsgPackSingleValueEncodingContainer(with: .int32(value) )
+	}
+	
+	func encode(_ value: Int64, forKey key: K) throws {
+		storage[key.stringValue] = MsgPackSingleValueEncodingContainer(with: .int64(value) )
+	}
+	
+	func encode(_ value: UInt, forKey key: K) throws {
+		storage[key.stringValue] = MsgPackSingleValueEncodingContainer(with: .from(uInt: value) )
+	}
+	
+	func encode(_ value: UInt8, forKey key: K) throws {
+		storage[key.stringValue] = MsgPackSingleValueEncodingContainer(with: .uInt8(value) )
+	}
+	
+	func encode(_ value: UInt16, forKey key: K) throws {
+		storage[key.stringValue] = MsgPackSingleValueEncodingContainer(with: .uInt16(value) )
+	}
+	
+	func encode(_ value: UInt32, forKey key: K) throws {
+		storage[key.stringValue] = MsgPackSingleValueEncodingContainer(with: .uInt32(value) )
+	}
+	
+	func encode(_ value: UInt64, forKey key: K) throws {
+		storage[key.stringValue] = MsgPackSingleValueEncodingContainer(with: .uInt64(value) )
+	}
+	
+	func encode(_ value: Float, forKey key: K) throws {
+		storage[key.stringValue] = MsgPackSingleValueEncodingContainer(with: .float32(value) )
+	}
+	
+	func encode(_ value: Double, forKey key: K) throws {
+		storage[key.stringValue] = MsgPackSingleValueEncodingContainer(with: .float64(value) )
+	}
+	
+	func encode(_ value: String, forKey key: K) throws {
+		storage[key.stringValue] = try MsgPackSingleValueEncodingContainer(with: .from(string: value) )
+	}
+	
+	func encode<T>(_ value: T, forKey key: K) throws where T : Encodable {
+		throw MsgPackEncodingError.notImplemented
+	}
+	
+	func nestedContainer<NestedKey>(keyedBy keyType: NestedKey.Type, forKey key: K) -> KeyedEncodingContainer<NestedKey> where NestedKey : CodingKey {
+		let keyedContainer = MsgPackKeyedEncodingContainer<NestedKey>()
+		storage[key.stringValue] = keyedContainer
+		return KeyedEncodingContainer(keyedContainer)
+	}
+	
+	func nestedUnkeyedContainer(forKey key: K) -> UnkeyedEncodingContainer {
+		preconditionFailure("not implemented")
+	}
+	
+	func superEncoder() -> Swift.Encoder {
+		preconditionFailure("not implemented")
+	}
+	
+	func superEncoder(forKey key: K) -> Swift.Encoder {
+		preconditionFailure("not implemented")
 	}
 }

MsgPack/Format.swift

@@ -32,10 +32,21 @@ enum Format {
 	case float64(Double)
 	
 	case fixString(Data)
-	case string8(Data)
+	case string8  (Data)
-	case string16(Data)
+	case string16 (Data)
-	case string32(Data)
+	case string32 (Data)
 	
+	case fixArray([Format])
+	case array16 ([Format])
+	case array32 ([Format])
+
+	case fixMap([(key: Format, value: Format)])
+	case map16 ([(key: Format, value: Format)])
+	case map32 ([(key: Format, value: Format)])	
+}
+
+
+extension Format {
 	func appendTo(data: inout Data) {
 		switch self {
 			
@@ -59,117 +70,136 @@ enum Format {
 			data.append(value)
 		case .uInt16(let value):
 			var newData = Data(count: 3)
-			newData.withUnsafeMutableBytes({ (byteContainer: UnsafeMutablePointer<UInt8>) -> Void in
+			newData[0] = 0xCD
-				byteContainer.pointee = 0xCD
+			newData.write(value: value.bigEndian, offset: 1)
-				byteContainer.advanced(by: 1).withMemoryRebound(to: UInt16.self, capacity: 1) {
-					$0.pointee = value.bigEndian
-				}
-			})
 			data.append(newData)
 		case .uInt32(let value):
 			var newData = Data(count: 5)
-			newData.withUnsafeMutableBytes({ (byteContainer: UnsafeMutablePointer<UInt8>) -> Void in
+			newData[0] = 0xCE
-				byteContainer.pointee = 0xCE
+			newData.write(value: value.bigEndian, offset: 1)
-				byteContainer.advanced(by: 1).withMemoryRebound(to: UInt32.self, capacity: 1) {
-					$0.pointee = value.bigEndian
-				}
-			})
 			data.append(newData)
 		case .uInt64(let value):
 			var newData = Data(count: 9)
-			newData.withUnsafeMutableBytes({ (byteContainer: UnsafeMutablePointer<UInt8>) -> Void in
+			newData[0] = 0xCF
-				byteContainer.pointee = 0xCF
+			newData.write(value: value.bigEndian, offset: 1)
-				byteContainer.advanced(by: 1).withMemoryRebound(to: UInt64.self, capacity: 1) {
-					$0.pointee = value.bigEndian
-				}
-			})
 			data.append(newData)
 			
 		// MARK: Signed integers
 		case .int8(let value):
 			var newData = Data(count: 2)
-			newData.withUnsafeMutableBytes({ (byteContainer: UnsafeMutablePointer<UInt8>) -> Void in
+			newData[0] = 0xD0
-				byteContainer.pointee = 0xD1
+			newData.write(value: value.bigEndian, offset: 1)
-				byteContainer.advanced(by: 1).withMemoryRebound(to: Int8.self, capacity: 1) {
-					$0.pointee = value.bigEndian
-				}
-			})
 			data.append(newData)
 		case .int16(let value):
 			var newData = Data(count: 3)
-			newData.withUnsafeMutableBytes({ (byteContainer: UnsafeMutablePointer<UInt8>) -> Void in
+			newData[0] = 0xD1
-				byteContainer.pointee = 0xD2
+			newData.write(value: value.bigEndian, offset: 1)
-				byteContainer.advanced(by: 1).withMemoryRebound(to: Int16.self, capacity: 1) {
-					$0.pointee = value.bigEndian
-				}
-			})
 			data.append(newData)
 		case .int32(let value):
 			var newData = Data(count: 5)
-			newData.withUnsafeMutableBytes({ (byteContainer: UnsafeMutablePointer<UInt8>) -> Void in
+			newData[0] = 0xD2
-				byteContainer.pointee = 0xD2
+			newData.write(value: value.bigEndian, offset: 1)
-				byteContainer.advanced(by: 1).withMemoryRebound(to: Int32.self, capacity: 1) {
-					$0.pointee = value.bigEndian
-				}
-			})
 			data.append(newData)
 		case .int64(let value):
 			var newData = Data(count: 9)
-			newData.withUnsafeMutableBytes({ (byteContainer: UnsafeMutablePointer<UInt8>) -> Void in
+			newData[0] = 0xD3
-				byteContainer.pointee = 0xD3
+			newData.write(value: value.bigEndian, offset: 1)
-				byteContainer.advanced(by: 1).withMemoryRebound(to: Int64.self, capacity: 1) {
-					$0.pointee = value.bigEndian
-				}
-			})
 			data.append(newData)
 			
 		// MARK: Floats
 		case .float32(let value):
 			var newData = Data(count: 5)
-			newData.withUnsafeMutableBytes({ (byteContainer: UnsafeMutablePointer<UInt8>) -> Void in
+			newData[0] = 0xCA
-				byteContainer.pointee = 0xCA
+			newData.write(value: value.bitPattern.bigEndian, offset: 1)
-				byteContainer.advanced(by: 1).withMemoryRebound(to: UInt32.self, capacity: 1) {
-					$0.pointee = value.bitPattern.bigEndian
-				}
-			})
 			data.append(newData)
 		case .float64(let value):
 			var newData = Data(count: 9)
-			newData.withUnsafeMutableBytes({ (byteContainer: UnsafeMutablePointer<UInt8>) -> Void in
+			newData[0] = 0xCB
-				byteContainer.pointee = 0xCB
+			newData.write(value: value.bitPattern.bigEndian, offset: 1)
-				byteContainer.advanced(by: 1).withMemoryRebound(to: UInt64.self, capacity: 1) {
-					$0.pointee = value.bitPattern.bigEndian
-				}
-			})
 			data.append(newData)
 			
 		// MARK: Strings
-		case .fixString(let value):
+		case .fixString(let utf8Data):
-			data.append(UInt8(value.count) & 0b00011111 | 0b10100000)
+			precondition(utf8Data.count < 32, "fix strings cannot contain more than 31 bytes")
-			data.append(value)
+			data.append( UInt8(utf8Data.count) | 0b10100000)
-		case .string8(let value):
+			data.append(utf8Data)
-			data.append(contentsOf: [0xD9, UInt8(value.count)])
+		case .string8(let utf8Data):
-			data.append(value)
+			data.append(contentsOf: [0xD9, UInt8(utf8Data.count)])
-		case .string16(let value):
+			data.append(utf8Data)
+		case .string16(let utf8Data):
 			var prefix = Data(count: 3)
-			prefix.withUnsafeMutableBytes({ (byteContainer: UnsafeMutablePointer<UInt8>) -> Void in
+			prefix[0] = 0xDA
-				byteContainer.pointee = 0xDA
+			prefix.write(value: UInt16(utf8Data.count).bigEndian, offset: 1)
-				byteContainer.advanced(by: 1).withMemoryRebound(to: UInt16.self, capacity: 1) {
-					$0.pointee = UInt16(value.count).bigEndian
-				}
-			})
 			data.append(prefix)
-			data.append(value)
+			data.append(utf8Data)
-		case .string32(let value):
+		case .string32(let utf8Data):
 			var prefix = Data(count: 5)
-			prefix.withUnsafeMutableBytes({ (byteContainer: UnsafeMutablePointer<UInt8>) -> Void in
+			prefix[0] = 0xDB
-				byteContainer.pointee = 0xDB
+			prefix.write(value: UInt32(utf8Data.count).bigEndian, offset: 1)
-				byteContainer.advanced(by: 1).withMemoryRebound(to: UInt32.self, capacity: 1) {
-					$0.pointee = UInt32(value.count).bigEndian
-				}
-			})
 			data.append(prefix)
-			data.append(value)
+			data.append(utf8Data)
+			
+		// MARK: Arrays
+		case .fixArray(let array):
+			precondition(array.count < 16, "fix arrays cannot contain more than 15 elements")
+			data.append( UInt8(array.count) | 0b10010000)
+			for element in array {
+				element.appendTo(data: &data)
+			}
+		case .array16(let array):
+			var prefix = Data(count: 3)
+			prefix[0] = 0xDC
+			prefix.write(value: UInt16(array.count).bigEndian, offset: 1)
+			data.append(prefix)
+			for element in array {
+				element.appendTo(data: &data)
+			}
+		case .array32(let array):
+			var prefix = Data(count: 5)
+			prefix[0] = 0xDD
+			prefix.write(value: UInt32(array.count).bigEndian, offset: 1)
+			data.append(prefix)
+			for element in array {
+				element.appendTo(data: &data)
+			}
+
+		// MARK: Maps
+		case .fixMap(let pairs):
+			precondition(pairs.count < 16, "fix maps cannot contain more than 15 key-value pairs")
+			data.append( UInt8(pairs.count) | 0b10000000)
+			for (key, value) in pairs {
+				key.appendTo(data: &data)
+				value.appendTo(data: &data)
+			}
+		case .map16(let pairs):
+			var prefix = Data(count: 3)
+			prefix[0] = 0xDE
+			prefix.write(value: UInt16(pairs.count).bigEndian, offset: 1)
+			data.append(prefix)
+			for (key, value) in pairs {
+				key.appendTo(data: &data)
+				value.appendTo(data: &data)
+			}
+		case .map32(let pairs):
+			var prefix = Data(count: 5)
+			prefix[0] = 0xDE
+			prefix.write(value: UInt32(pairs.count).bigEndian, offset: 1)
+			data.append(prefix)
+			for (key, value) in pairs {
+				key.appendTo(data: &data)
+				value.appendTo(data: &data)
+			}
+		}
+	}
+}
+
+
+extension Data {
+	mutating func write<T>(value: T, offset: Int) {
+		withUnsafeMutableBytes {(byteContainer: UnsafeMutablePointer<UInt8>) -> Void in
+			byteContainer.advanced(by: offset).withMemoryRebound(to: T.self, capacity: 1) {
+				$0.pointee = value
+			}
 		}
 	}
 }

MsgPackTests/MsgPackTests.swift

@@ -10,6 +10,10 @@ import XCTest
 @testable import MsgPack
 
 class MsgPackTests: XCTestCase {
+	//    override func tearDown() {
+	//        // Put teardown code here. This method is called after the invocation of each test method in the class.
+	//        super.tearDown()
+	//    }
 
 	var encoder: MsgPack.Encoder!
 
@@ -19,10 +23,6 @@ class MsgPackTests: XCTestCase {
 		encoder = Encoder()
 	}
 
-	//    override func tearDown() {
-	//        // Put teardown code here. This method is called after the invocation of each test method in the class.
-	//        super.tearDown()
-	//    }
 
 	func testEncodeTrue() {
 		do {
@@ -107,5 +107,27 @@ class MsgPackTests: XCTestCase {
 			}
 		}
 	}
+	
+//	var encoder = MsgPack.JSONEncoder2()
+//
+//	struct Obj: Encodable {
+//		let i: Int
+//		let p: Person
+//	}
+//
+//	struct Person: Encodable {
+//		let name: String
+//		let friend: Friend
+//	}
+//
+//	struct Friend: Encodable {
+//		let count: Double
+//	}
+//
+//	func testDinges() {
+//		try! encoder.encode(
+//			Obj(i: 3, p: Person(name: "Dinges", friend: Friend(count: 8)))
+//		)
+//	}
 }
 

Playground.playground/Contents.swift

@@ -5,23 +5,27 @@ import Foundation
 
 let encoder = Encoder()
 
-let integerData = try encoder.encode(0x0102030405060708)
+try encoder.encode(0x0102030405060708)
-String(integerData[0], radix: 16)
 
-integerData[1]
+try encoder.encode("Hello")
-integerData[2]
-integerData[3]
-integerData[4]
-integerData[5]
-integerData[6]
-integerData[7]
-integerData[8]
 
-let doubleData = try encoder.encode("Hello there 123456789012345678901")
+try encoder.encode("😇")
-String(doubleData[0], radix: 16)
 
-String(doubleData[1], radix: 16)
+var n: Int?
-String(doubleData[2], radix: 16)
+try encoder.encode(n)
-String(doubleData[3], radix: 16)
+
-String(doubleData[4], radix: 16)
+struct Position: Encodable {
-String(doubleData[5], radix: 16)
+	let x: Int8
+	let y: Int8
+}
+
+struct Circle: Encodable {
+	let center: Position
+	let radius: UInt
+}
+
+do {
+	try encoder.encode(Circle(center: Position(x: -1, y: 2), radius: 50)).forEach { print(String($0, radix: 16)) }
+} catch {
+	error
+}