Updated the session delegate override closures to match the method signatures.

Source/Alamofire.swift

@@ -368,13 +368,13 @@ public class Manager {
         // MARK: NSURLSessionDelegate
 
         /// NSURLSessionDelegate override closure for `URLSession:didBecomeInvalidWithError:` method.
-        public var sessionDidBecomeInvalidWithError: ((NSURLSession!, NSError!) -> Void)?
+        public var sessionDidBecomeInvalidWithError: ((NSURLSession, NSError?) -> Void)?
 
         /// NSURLSessionDelegate override closure for `URLSession:didReceiveChallenge:completionHandler:` method.
-        public var sessionDidReceiveChallenge: ((NSURLSession!, NSURLAuthenticationChallenge) -> (NSURLSessionAuthChallengeDisposition, NSURLCredential!))?
+        public var sessionDidReceiveChallenge: ((NSURLSession, NSURLAuthenticationChallenge) -> (NSURLSessionAuthChallengeDisposition, NSURLCredential!))?
 
         /// NSURLSessionDelegate override closure for `URLSessionDidFinishEventsForBackgroundURLSession:` method.
-        public var sessionDidFinishEventsForBackgroundURLSession: ((NSURLSession!) -> Void)?
+        public var sessionDidFinishEventsForBackgroundURLSession: ((NSURLSession) -> Void)?
 
         public func URLSession(session: NSURLSession, didBecomeInvalidWithError error: NSError?) {
             sessionDidBecomeInvalidWithError?(session, error)
@@ -395,22 +395,22 @@ public class Manager {
         // MARK: NSURLSessionTaskDelegate
 
         /// Overrides default behavior for NSURLSessionTaskDelegate method `URLSession:task:willPerformHTTPRedirection:newRequest:completionHandler:`.
-        public var taskWillPerformHTTPRedirection: ((NSURLSession!, NSURLSessionTask!, NSHTTPURLResponse!, NSURLRequest!) -> (NSURLRequest!))?
+        public var taskWillPerformHTTPRedirection: ((NSURLSession, NSURLSessionTask, NSHTTPURLResponse, NSURLRequest) -> (NSURLRequest!))?
 
         /// Overrides default behavior for NSURLSessionTaskDelegate method `URLSession:task:didReceiveChallenge:completionHandler:`.
-        public var taskDidReceiveChallenge: ((NSURLSession!, NSURLSessionTask!, NSURLAuthenticationChallenge) -> (NSURLSessionAuthChallengeDisposition, NSURLCredential!))?
+        public var taskDidReceiveChallenge: ((NSURLSession, NSURLSessionTask, NSURLAuthenticationChallenge) -> (NSURLSessionAuthChallengeDisposition, NSURLCredential!))?
 
         /// Overrides default behavior for NSURLSessionTaskDelegate method `URLSession:session:task:needNewBodyStream:`.
-        public var taskNeedNewBodyStream: ((NSURLSession!, NSURLSessionTask!) -> (NSInputStream!))?
+        public var taskNeedNewBodyStream: ((NSURLSession, NSURLSessionTask) -> (NSInputStream!))?
 
         /// Overrides default behavior for NSURLSessionTaskDelegate method `URLSession:task:didSendBodyData:totalBytesSent:totalBytesExpectedToSend:`.
-        public var taskDidSendBodyData: ((NSURLSession!, NSURLSessionTask!, Int64, Int64, Int64) -> Void)?
+        public var taskDidSendBodyData: ((NSURLSession, NSURLSessionTask, Int64, Int64, Int64) -> Void)?
 
         /// Overrides default behavior for NSURLSessionTaskDelegate method `URLSession:task:didCompleteWithError:`.
-        public var taskDidComplete: ((NSURLSession!, NSURLSessionTask!, NSError!) -> Void)?
+        public var taskDidComplete: ((NSURLSession, NSURLSessionTask, NSError?) -> Void)?
 
         public func URLSession(session: NSURLSession, task: NSURLSessionTask, willPerformHTTPRedirection response: NSHTTPURLResponse, newRequest request: NSURLRequest, completionHandler: ((NSURLRequest!) -> Void)) {
-            var redirectRequest = request
+            var redirectRequest: NSURLRequest! = request
 
             if taskWillPerformHTTPRedirection != nil {
                 redirectRequest = taskWillPerformHTTPRedirection!(session, task, response, request)
@@ -458,16 +458,16 @@ public class Manager {
         // MARK: NSURLSessionDataDelegate
 
         /// Overrides default behavior for NSURLSessionDataDelegate method `URLSession:dataTask:didReceiveResponse:completionHandler:`.
-        public var dataTaskDidReceiveResponse: ((NSURLSession!, NSURLSessionDataTask!, NSURLResponse!) -> (NSURLSessionResponseDisposition))?
+        public var dataTaskDidReceiveResponse: ((NSURLSession, NSURLSessionDataTask, NSURLResponse) -> (NSURLSessionResponseDisposition))?
 
         /// Overrides default behavior for NSURLSessionDataDelegate method `URLSession:dataTask:didBecomeDownloadTask:`.
-        public var dataTaskDidBecomeDownloadTask: ((NSURLSession!, NSURLSessionDataTask!, NSURLSessionDownloadTask!) -> Void)?
+        public var dataTaskDidBecomeDownloadTask: ((NSURLSession, NSURLSessionDataTask, NSURLSessionDownloadTask) -> Void)?
 
         /// Overrides default behavior for NSURLSessionDataDelegate method `URLSession:dataTask:didReceiveData:`.
-        public var dataTaskDidReceiveData: ((NSURLSession!, NSURLSessionDataTask!, NSData!) -> Void)?
+        public var dataTaskDidReceiveData: ((NSURLSession, NSURLSessionDataTask, NSData) -> Void)?
 
         /// Overrides default behavior for NSURLSessionDataDelegate method `URLSession:dataTask:willCacheResponse:completionHandler:`.
-        public var dataTaskWillCacheResponse: ((NSURLSession!, NSURLSessionDataTask!, NSCachedURLResponse!) -> (NSCachedURLResponse))?
+        public var dataTaskWillCacheResponse: ((NSURLSession, NSURLSessionDataTask, NSCachedURLResponse) -> (NSCachedURLResponse!))?
 
         public func URLSession(session: NSURLSession, dataTask: NSURLSessionDataTask, didReceiveResponse response: NSURLResponse, completionHandler: ((NSURLSessionResponseDisposition) -> Void)) {
             var disposition: NSURLSessionResponseDisposition = .Allow
@@ -509,13 +509,13 @@ public class Manager {
         // MARK: NSURLSessionDownloadDelegate
 
         /// Overrides default behavior for NSURLSessionDownloadDelegate method `URLSession:downloadTask:didFinishDownloadingToURL:`.
-        public var downloadTaskDidFinishDownloadingToURL: ((NSURLSession!, NSURLSessionDownloadTask!, NSURL) -> (NSURL))?
+        public var downloadTaskDidFinishDownloadingToURL: ((NSURLSession, NSURLSessionDownloadTask, NSURL) -> Void)?
 
         /// Overrides default behavior for NSURLSessionDownloadDelegate method `URLSession:downloadTask:didWriteData:totalBytesWritten:totalBytesExpectedToWrite:`.
-        public var downloadTaskDidWriteData: ((NSURLSession!, NSURLSessionDownloadTask!, Int64, Int64, Int64) -> Void)?
+        public var downloadTaskDidWriteData: ((NSURLSession, NSURLSessionDownloadTask, Int64, Int64, Int64) -> Void)?
 
         /// Overrides default behavior for NSURLSessionDownloadDelegate method `URLSession:downloadTask:didResumeAtOffset:expectedTotalBytes:`.
-        public var downloadTaskDidResumeAtOffset: ((NSURLSession!, NSURLSessionDownloadTask!, Int64, Int64) -> Void)?
+        public var downloadTaskDidResumeAtOffset: ((NSURLSession, NSURLSessionDownloadTask, Int64, Int64) -> Void)?
 
         public func URLSession(session: NSURLSession, downloadTask: NSURLSessionDownloadTask, didFinishDownloadingToURL location: NSURL) {
             if downloadTaskDidFinishDownloadingToURL != nil {

Tests/ResponseTests.swift

@@ -75,7 +75,7 @@ class AlamofireRedirectResponseTestCase: XCTestCase {
         
         let delegate: Alamofire.Manager.SessionDelegate = Alamofire.Manager.sharedInstance.delegate
         
-        delegate.taskWillPerformHTTPRedirection = { (session: NSURLSession!, task: NSURLSessionTask!, response: NSHTTPURLResponse!, request: NSURLRequest!) in
+        delegate.taskWillPerformHTTPRedirection = { session, task, response, request in
             // Accept the redirect by returning the updated request.
             return request
         }
@@ -102,7 +102,7 @@ class AlamofireRedirectResponseTestCase: XCTestCase {
         
         let delegate: Alamofire.Manager.SessionDelegate = Alamofire.Manager.sharedInstance.delegate
         
-        delegate.taskWillPerformHTTPRedirection = { (session: NSURLSession!, task: NSURLSessionTask!, response: NSHTTPURLResponse!, request: NSURLRequest!) in
+        delegate.taskWillPerformHTTPRedirection = { session, task, response, request in
             // Disallow redirects by returning nil.
             // TODO: NSURLSessionDelegate's URLSession:task:willPerformHTTPRedirection:newRequest:completionHandler:
             // suggests that returning nil should refuse the redirect, but this causes a deadlock/timeout
@@ -111,7 +111,7 @@ class AlamofireRedirectResponseTestCase: XCTestCase {
         }
         
         Alamofire.request(.GET, URL)
-            .response { (request, response, data, error) in
+            .response { request, response, data, error in
                 expectation.fulfill()
                 XCTAssertNotNil(request, "request should not be nil")
                 XCTAssertNotNil(response, "response should not be nil")