Fix build

Source/SocketIO/Client/SocketIOClient.swift

@@ -230,7 +230,7 @@ open class SocketIOClient : NSObject, SocketIOClientSpec {
     /// - parameter event: The event to send.
     /// - parameter items: The items to send with this event. May be left out.
     /// - parameter completion: Callback called on transport write completion.
-    open func emit(_ event: String, _ items: SocketData..., completion: @escaping (() -> ())? = nil)  {
+    open func emit(_ event: String, _ items: SocketData..., completion: (() -> ())? = nil)  {
         do {
             try emit(event, with: items.map({ try $0.socketRepresentation() }), completion: completion)
         } catch {
@@ -256,7 +256,7 @@ open class SocketIOClient : NSObject, SocketIOClientSpec {
     /// - parameter items: The items to send with this event. Send an empty array to send no data.
     /// - parameter completion: Callback called on transport write completion.
     @objc
-    open func emit(_ event: String, with items: [Any], completion: @escaping (() -> ())? = nil) {
+    open func emit(_ event: String, with items: [Any], completion: (() -> ())? = nil) {
         emit([event] + items, completion: completion)
     }
 
@@ -317,13 +317,13 @@ open class SocketIOClient : NSObject, SocketIOClientSpec {
               ack: Int? = nil,
               binary: Bool = true,
               isAck: Bool = false,
-              completion: @escaping (() -> ())? = nil
+              completion: (() -> ())? = nil
     ) {
         // wrap the completion handler so it always runs async via handlerQueue
         let wrappedCompletion: (() -> ())? = (completion == nil) ? nil : {[weak self] in
             guard let this = self else { return }
             this.manager?.handleQueue.async {
-                completion()
+                completion!()
             }
         }
 

Source/SocketIO/Client/SocketIOClientSpec.swift

@@ -109,7 +109,7 @@ public protocol SocketIOClientSpec : AnyObject {
     /// - parameter event: The event to send.
     /// - parameter items: The items to send with this event. May be left out.
     /// - parameter completion: Callback called on transport write completion.
-    func emit(_ event: String, _ items: SocketData..., completion: @escaping (() -> ())? = nil)
+    func emit(_ event: String, _ items: SocketData..., completion: (() -> ())?)
 
     /// Call when you wish to tell the server that you've received the event for `ack`.
     ///

Source/SocketIO/Engine/SocketEngine.swift

@@ -617,7 +617,7 @@ open class SocketEngine : NSObject, URLSessionDelegate, SocketEnginePollable, So
     /// - parameter type: The type of this message.
     /// - parameter data: Any data that this message has.
     /// - parameter completion: Callback called on transport write completion.
-    open func write(_ msg: String, withType type: SocketEnginePacketType, withData data: [Data], completion: @escaping (() -> ())? = nil) {
+    open func write(_ msg: String, withType type: SocketEnginePacketType, withData data: [Data], completion: (() -> ())? = nil) {
         engineQueue.async {
             guard self.connected else {
                 completion?()

Source/SocketIO/Engine/SocketEnginePollable.swift

@@ -65,7 +65,7 @@ public protocol SocketEnginePollable : SocketEngineSpec {
     /// - parameter message: The message to send.
     /// - parameter withType: The type of message to send.
     /// - parameter withData: The data associated with this message.
-    func sendPollMessage(_ message: String, withType type: SocketEnginePacketType, withData datas: [Data], completion: @escaping (() -> ())?)
+    func sendPollMessage(_ message: String, withType type: SocketEnginePacketType, withData datas: [Data], completion: (() -> ())?)
 
     /// Call to stop polling and invalidate the URLSession.
     func stopPolling()
@@ -219,7 +219,7 @@ extension SocketEnginePollable {
     /// - parameter withType: The type of message to send.
     /// - parameter withData: The data associated with this message.
     /// - parameter completion: Callback called on transport write completion.
-    public func sendPollMessage(_ message: String, withType type: SocketEnginePacketType, withData datas: [Data], completion: @escaping (() -> ())? = nil) {
+    public func sendPollMessage(_ message: String, withType type: SocketEnginePacketType, withData datas: [Data], completion: (() -> ())? = nil) {
         DefaultSocketLogger.Logger.log("Sending poll: \(message) as type: \(type.rawValue)", type: "SocketEnginePolling")
 
         postWait.append((String(type.rawValue) + message, completion))

Source/SocketIO/Engine/SocketEngineSpec.swift

@@ -138,7 +138,7 @@ import Starscream
     /// - parameter type: The type of this message.
     /// - parameter data: Any data that this message has.
     /// - parameter completion: Callback called on transport write completion.
-    func write(_ msg: String, withType type: SocketEnginePacketType, withData data: [Data], completion: @escaping (() -> ())?)
+    func write(_ msg: String, withType type: SocketEnginePacketType, withData data: [Data], completion: (() -> ())?)
 }
 
 extension SocketEngineSpec {
@@ -180,7 +180,7 @@ extension SocketEngineSpec {
     }
 
     /// Send an engine message (4)
-    func send(_ msg: String, withData datas: [Data], completion: @escaping (() -> ())? = nil) {
+    func send(_ msg: String, withData datas: [Data], completion: (() -> ())? = nil) {
         write(msg, withType: .message, withData: datas, completion: completion)
     }
 }

Source/SocketIO/Engine/SocketEngineWebsocket.swift

@@ -41,7 +41,7 @@ public protocol SocketEngineWebsocket : SocketEngineSpec {
     func sendWebSocketMessage(_ str: String,
                               withType type: SocketEnginePacketType,
                               withData datas: [Data],
-                              completion: @escaping (() -> ())?)
+                              completion: (() -> ())?)
 }
 
 // WebSocket methods
@@ -63,7 +63,7 @@ extension SocketEngineWebsocket {
     public func sendWebSocketMessage(_ str: String,
                                      withType type: SocketEnginePacketType,
                                      withData datas: [Data],
-                                     completion: @escaping (() -> ())?
+                                     completion: (() -> ())?
     ) {
         DefaultSocketLogger.Logger.log("Sending ws: \(str) as type: \(type.rawValue)", type: "SocketEngineWebSocket")
 

Tests/TestSocketIO/SocketMangerTest.swift

@@ -198,7 +198,7 @@ public class TestSocket : SocketIOClient {
         super.didDisconnect(reason: reason)
     }
 
-    public override func emit(_ event: String, with items: [Any], completion: @escaping (() -> ())?) {
+    public override func emit(_ event: String, with items: [Any], completion: (() -> ())?) {
         expectations[ManagerExpectation.emitAllEventCalled]?.fulfill()
         expectations[ManagerExpectation.emitAllEventCalled] = nil
 

Tests/TestSocketIO/SocketSideEffectTest.swift

@@ -511,5 +511,5 @@ class TestEngine : SocketEngineSpec {
     func flushWaitingForPostToWebSocket() { }
     func parseEngineData(_ data: Data) { }
     func parseEngineMessage(_ message: String) { }
-    func write(_ msg: String, withType type: SocketEnginePacketType, withData data: [Data], completion: @escaping (() -> ())?) { }
+    func write(_ msg: String, withType type: SocketEnginePacketType, withData data: [Data], completion: (() -> ())?) { }
 }