Xcode 9 / Swift 4

.swift-version

@@ -1 +1 @@
-3.1
+4.0

.travis.yml

@@ -6,7 +6,7 @@ matrix:
   include:
     - os: osx
       language: objective-c
-      osx_image: xcode8.3
+      osx_image: xcode9
       script:
         - set -o pipefail
         - xcodebuild build-for-testing test-without-building -workspace APIKit.xcworkspace -scheme APIKit -configuration Release ENABLE_TESTABILITY=YES | xcpretty -c
@@ -16,7 +16,7 @@ matrix:
         - bash <(curl -s https://codecov.io/bash)
     - os: osx
       language: generic
-      osx_image: xcode8.3
+      osx_image: xcode9
       script:
         - swift build
         - swift test

APIKit.podspec

@@ -23,6 +23,8 @@ Pod::Spec.new do |s|
       :tag => "#{s.version}",
   }
 
+  s.pod_target_xcconfigs = { "SWIFT_VERSION" => "4.0" }
+
   s.license = {
     :type => "MIT",
     :text => <<-LICENSE

APIKit.xcodeproj/project.pbxproj

@@ -127,7 +127,7 @@
 		7F7048ED1D9D8A12003C99F6 /* ResponseError.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; name = ResponseError.swift; path = Sources/APIKit/Error/ResponseError.swift; sourceTree = SOURCE_ROOT; };
 		7F7048EE1D9D8A12003C99F6 /* SessionTaskError.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; name = SessionTaskError.swift; path = Sources/APIKit/Error/SessionTaskError.swift; sourceTree = SOURCE_ROOT; };
 		7F7048F21D9D8A1F003C99F6 /* URLEncodedSerialization.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; name = URLEncodedSerialization.swift; path = Sources/APIKit/Serializations/URLEncodedSerialization.swift; sourceTree = SOURCE_ROOT; };
-		7F8ECDFD1B6A799E00234E04 /* Demo.playground */ = {isa = PBXFileReference; lastKnownFileType = file.playground; path = Demo.playground; sourceTree = "<group>"; };
+		7F8ECDFD1B6A799E00234E04 /* Demo.playground */ = {isa = PBXFileReference; lastKnownFileType = file.playground; path = Demo.playground; sourceTree = "<group>"; xcLanguageSpecificationIdentifier = xcode.lang.swift; };
 		7FA1690C1D9D8C80006C982B /* HTTPStub.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = HTTPStub.swift; sourceTree = "<group>"; };
 		CD5115241B1FFBA900514240 /* Result.framework */ = {isa = PBXFileReference; lastKnownFileType = wrapper.framework; path = Result.framework; sourceTree = BUILT_PRODUCTS_DIR; };
 		ECA831471DE4DDBF004EB1B5 /* ProtobufDataParser.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; name = ProtobufDataParser.swift; path = Sources/APIKit/DataParser/ProtobufDataParser.swift; sourceTree = SOURCE_ROOT; };
@@ -402,7 +402,7 @@
 			isa = PBXProject;
 			attributes = {
 				LastSwiftUpdateCheck = 0730;
-				LastUpgradeCheck = 0810;
+				LastUpgradeCheck = 0900;
 				ORGANIZATIONNAME = "Yosuke Ishikawa";
 				TargetAttributes = {
 					141F12161C1C9ABE0026D415 = {
@@ -562,23 +562,35 @@
 			isa = XCBuildConfiguration;
 			baseConfigurationReference = 141F12101C1C96820026D415 /* Debug.xcconfig */;
 			buildSettings = {
+				CLANG_WARN_BLOCK_CAPTURE_AUTORELEASING = YES;
+				CLANG_WARN_COMMA = YES;
 				CLANG_WARN_INFINITE_RECURSION = YES;
+				CLANG_WARN_NON_LITERAL_NULL_CONVERSION = YES;
+				CLANG_WARN_OBJC_LITERAL_CONVERSION = YES;
+				CLANG_WARN_RANGE_LOOP_ANALYSIS = YES;
+				CLANG_WARN_STRICT_PROTOTYPES = YES;
 				CLANG_WARN_SUSPICIOUS_MOVE = YES;
 				ENABLE_TESTABILITY = YES;
 				GCC_NO_COMMON_BLOCKS = YES;
 				ONLY_ACTIVE_ARCH = YES;
-				SWIFT_VERSION = 3.0;
+				SWIFT_VERSION = 4.0;
 			};
 			name = Debug;
 		};
 		7F45FCF21A94D02C006863BB /* Release */ = {
 			isa = XCBuildConfiguration;
 			baseConfigurationReference = 141F12111C1C96820026D415 /* Release.xcconfig */;
 			buildSettings = {
+				CLANG_WARN_BLOCK_CAPTURE_AUTORELEASING = YES;
+				CLANG_WARN_COMMA = YES;
 				CLANG_WARN_INFINITE_RECURSION = YES;
+				CLANG_WARN_NON_LITERAL_NULL_CONVERSION = YES;
+				CLANG_WARN_OBJC_LITERAL_CONVERSION = YES;
+				CLANG_WARN_RANGE_LOOP_ANALYSIS = YES;
+				CLANG_WARN_STRICT_PROTOTYPES = YES;
 				CLANG_WARN_SUSPICIOUS_MOVE = YES;
 				GCC_NO_COMMON_BLOCKS = YES;
-				SWIFT_VERSION = 3.0;
+				SWIFT_VERSION = 4.0;
 			};
 			name = Release;
 		};

APIKit.xcodeproj/xcshareddata/xcschemes/APIKit.xcscheme

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <Scheme
-   LastUpgradeVersion = "0810"
+   LastUpgradeVersion = "0900"
    version = "1.3">
    <BuildAction
       parallelizeBuildables = "YES"
@@ -40,6 +40,7 @@
       buildConfiguration = "Debug"
       selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
       selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
+      language = ""
       shouldUseLaunchSchemeArgsEnv = "YES"
       codeCoverageEnabled = "YES">
       <Testables>
@@ -70,6 +71,7 @@
       buildConfiguration = "Debug"
       selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
       selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
+      language = ""
       launchStyle = "0"
       useCustomWorkingDirectory = "NO"
       ignoresPersistentStateOnLaunch = "NO"

Package.swift

@@ -1,9 +1,24 @@
+// swift-tools-version:4.0
 import PackageDescription
 
 let package = Package(
     name: "APIKit",
+    products: [
+        .library(name: "APIKit", targets: ["APIKit"]),
+    ],
     dependencies: [
-        .Package(url: "https://github.com/antitypical/Result.git", majorVersion: 3),
+        .package(url: "https://github.com/antitypical/Result.git", from: "3.0.0"),
+    ],
+    targets: [
+        .target(
+            name: "APIKit", 
+            dependencies: ["Result"],
+            exclude: ["BodyParameters/AbstractInputStream.m"]
+        ),
+         .testTarget(
+            name: "APIKitTests",
+            dependencies: ["APIKit"]
+        ),
     ],
-    exclude: ["Sources/APIKit/BodyParameters/AbstractInputStream.m"]
+    swiftLanguageVersions: [4]
 )

Sources/APIKit/Serializations/URLEncodedSerialization.swift

@@ -27,7 +27,7 @@ private func escape(_ string: String) -> String {
         let endIndex = string.index(index, offsetBy: batchSize, limitedBy: string.endIndex) ?? string.endIndex
         let range = startIndex..<endIndex
 
-        let substring = string.substring(with: range)
+        let substring = String(string[range])
 
         escaped += substring.addingPercentEncoding(withAllowedCharacters: allowedCharacterSet) ?? substring
 

Tests/APIKitTests/BodyParametersType/MultipartFormDataParametersTests.swift

@@ -24,11 +24,11 @@ class MultipartFormDataParametersTests: XCTestCase {
 
             let pattern = "^multipart/form-data; boundary=([\\w.]+)$"
             let regexp = try NSRegularExpression(pattern: pattern, options: [])
-            let range = NSRange(location: 0, length: parameters.contentType.characters.count)
+            let range = NSRange(location: 0, length: parameters.contentType.count)
             let match = regexp.matches(in: parameters.contentType, options: [], range: range)
             XCTAssertTrue(match.count > 0)
 
-            let boundary = (parameters.contentType as NSString).substring(with: match.first!.rangeAt(1))
+            let boundary = (parameters.contentType as NSString).substring(with: match.first!.range(at: 1))
             XCTAssertEqual(parameters.contentType, "multipart/form-data; boundary=\(boundary)")
             XCTAssertEqual(encodedData, "--\(boundary)\(returnCode)Content-Disposition: form-data; name=\"foo\"\(returnCode)\(returnCode)1\(returnCode)--\(boundary)\(returnCode)Content-Disposition: form-data; name=\"bar\"\(returnCode)\(returnCode)2\(returnCode)--\(boundary)--\(returnCode)")
         } catch {
@@ -57,11 +57,11 @@ class MultipartFormDataParametersTests: XCTestCase {
 
             let pattern = "^multipart/form-data; boundary=([\\w.]+)$"
             let regexp = try NSRegularExpression(pattern: pattern, options: [])
-            let range = NSRange(location: 0, length: parameters.contentType.characters.count)
+            let range = NSRange(location: 0, length: parameters.contentType.count)
             let match = regexp.matches(in: parameters.contentType, options: [], range: range)
             XCTAssertTrue(match.count > 0)
 
-            let boundary = (parameters.contentType as NSString).substring(with: match.first!.rangeAt(1))
+            let boundary = (parameters.contentType as NSString).substring(with: match.first!.range(at: 1))
             XCTAssertEqual(parameters.contentType, "multipart/form-data; boundary=\(boundary)")
             XCTAssertEqual(encodedData, "--\(boundary)\(returnCode)Content-Disposition: form-data; name=\"foo\"\(returnCode)\(returnCode)1\(returnCode)--\(boundary)\(returnCode)Content-Disposition: form-data; name=\"bar\"\(returnCode)\(returnCode)2\(returnCode)--\(boundary)--\(returnCode)")
         } catch {
@@ -92,11 +92,11 @@ class MultipartFormDataParametersTests: XCTestCase {
 
             let pattern = "^multipart/form-data; boundary=([\\w.]+)$"
             let regexp = try NSRegularExpression(pattern: pattern, options: [])
-            let range = NSRange(location: 0, length: parameters.contentType.characters.count)
+            let range = NSRange(location: 0, length: parameters.contentType.count)
             let match = regexp.matches(in: parameters.contentType, options: [], range: range)
             XCTAssertTrue(match.count > 0)
 
-            let boundary = (parameters.contentType as NSString).substring(with: match.first!.rangeAt(1))
+            let boundary = (parameters.contentType as NSString).substring(with: match.first!.range(at: 1))
             XCTAssertEqual(parameters.contentType, "multipart/form-data; boundary=\(boundary)")
             XCTAssertEqual(encodedData, "--\(boundary)\(returnCode)Content-Disposition: form-data; name=\"test\"; filename=\"test.json\"\r\nContent-Type: application/json\(returnCode)\(returnCode)\(testString)\(returnCode)--\(boundary)--\(returnCode)")
         } catch {