Backport Xcode 10 changes to 7.x-branch

Sources/Nimble/Adapters/NMBExpectation.swift

@@ -30,13 +30,13 @@ internal struct ObjCMatcherWrapper: Matcher {
 
 // Equivalent to Expectation, but for Nimble's Objective-C interface
 public class NMBExpectation: NSObject {
-    internal let _actualBlock: () -> NSObject!
+    internal let _actualBlock: () -> NSObject?
     internal var _negative: Bool
     internal let _file: FileString
     internal let _line: UInt
     internal var _timeout: TimeInterval = 1.0
 
-    @objc public init(actualBlock: @escaping () -> NSObject!, negative: Bool, file: FileString, line: UInt) {
+    @objc public init(actualBlock: @escaping () -> NSObject?, negative: Bool, file: FileString, line: UInt) {
         self._actualBlock = actualBlock
         self._negative = negative
         self._file = file

Sources/Nimble/Adapters/NMBObjCMatcher.swift

@@ -55,7 +55,7 @@ public class NMBObjCMatcher: NSObject, NMBMatcher {
         return true
     }
 
-    public func matches(_ actualBlock: @escaping () -> NSObject!, failureMessage: FailureMessage, location: SourceLocation) -> Bool {
+    public func matches(_ actualBlock: @escaping () -> NSObject?, failureMessage: FailureMessage, location: SourceLocation) -> Bool {
         let expr = Expression(expression: actualBlock, location: location)
         let result = _match(
             expr,
@@ -67,7 +67,7 @@ public class NMBObjCMatcher: NSObject, NMBMatcher {
         }
     }
 
-    public func doesNotMatch(_ actualBlock: @escaping () -> NSObject!, failureMessage: FailureMessage, location: SourceLocation) -> Bool {
+    public func doesNotMatch(_ actualBlock: @escaping () -> NSObject?, failureMessage: FailureMessage, location: SourceLocation) -> Bool {
         let expr = Expression(expression: actualBlock, location: location)
         let result = _doesNotMatch(
             expr,

Sources/Nimble/Matchers/BeCloseTo.swift

@@ -43,7 +43,7 @@ public class NMBObjCBeCloseToMatcher: NSObject, NMBMatcher {
         _delta = within
     }
 
-    @objc public func matches(_ actualExpression: @escaping () -> NSObject!, failureMessage: FailureMessage, location: SourceLocation) -> Bool {
+    @objc public func matches(_ actualExpression: @escaping () -> NSObject?, failureMessage: FailureMessage, location: SourceLocation) -> Bool {
         let actualBlock: () -> NMBDoubleConvertible? = ({
             return actualExpression() as? NMBDoubleConvertible
         })
@@ -52,7 +52,7 @@ public class NMBObjCBeCloseToMatcher: NSObject, NMBMatcher {
         return try! matcher.matches(expr, failureMessage: failureMessage)
     }
 
-    @objc public func doesNotMatch(_ actualExpression: @escaping () -> NSObject!, failureMessage: FailureMessage, location: SourceLocation) -> Bool {
+    @objc public func doesNotMatch(_ actualExpression: @escaping () -> NSObject?, failureMessage: FailureMessage, location: SourceLocation) -> Bool {
         let actualBlock: () -> NMBDoubleConvertible? = ({
             return actualExpression() as? NMBDoubleConvertible
         })

Sources/Nimble/Matchers/MatcherProtocols.swift

@@ -31,8 +31,8 @@ extension Matcher {
 #if os(macOS) || os(iOS) || os(tvOS) || os(watchOS)
 /// Objective-C interface to the Swift variant of Matcher.
 @objc public protocol NMBMatcher {
-    func matches(_ actualBlock: @escaping () -> NSObject!, failureMessage: FailureMessage, location: SourceLocation) -> Bool
-    func doesNotMatch(_ actualBlock: @escaping () -> NSObject!, failureMessage: FailureMessage, location: SourceLocation) -> Bool
+    func matches(_ actualBlock: @escaping () -> NSObject?, failureMessage: FailureMessage, location: SourceLocation) -> Bool
+    func doesNotMatch(_ actualBlock: @escaping () -> NSObject?, failureMessage: FailureMessage, location: SourceLocation) -> Bool
 }
 #endif
 

Sources/Nimble/Matchers/Predicate.swift

@@ -251,20 +251,20 @@ public class NMBPredicate: NSObject {
         self.predicate = predicate
     }
 
-    func satisfies(_ expression: @escaping () -> NSObject!, location: SourceLocation) -> NMBPredicateResult {
+    func satisfies(_ expression: @escaping () -> NSObject?, location: SourceLocation) -> NMBPredicateResult {
         let expr = Expression(expression: expression, location: location)
         return self.predicate(expr)
     }
 }
 
 extension NMBPredicate: NMBMatcher {
-    public func matches(_ actualBlock: @escaping () -> NSObject!, failureMessage: FailureMessage, location: SourceLocation) -> Bool {
+    public func matches(_ actualBlock: @escaping () -> NSObject?, failureMessage: FailureMessage, location: SourceLocation) -> Bool {
         let result = satisfies(actualBlock, location: location).toSwift()
         result.message.update(failureMessage: failureMessage)
         return result.status.toBoolean(expectation: .toMatch)
     }
 
-    public func doesNotMatch(_ actualBlock: @escaping () -> NSObject!, failureMessage: FailureMessage, location: SourceLocation) -> Bool {
+    public func doesNotMatch(_ actualBlock: @escaping () -> NSObject?, failureMessage: FailureMessage, location: SourceLocation) -> Bool {
         let result = satisfies(actualBlock, location: location).toSwift()
         result.message.update(failureMessage: failureMessage)
         return result.status.toBoolean(expectation: .toNotMatch)

Sources/Nimble/Matchers/RaisesException.swift

@@ -129,7 +129,7 @@ public class NMBObjCRaiseExceptionMatcher: NSObject, NMBMatcher {
         _block = block
     }
 
-    @objc public func matches(_ actualBlock: @escaping () -> NSObject!, failureMessage: FailureMessage, location: SourceLocation) -> Bool {
+    @objc public func matches(_ actualBlock: @escaping () -> NSObject?, failureMessage: FailureMessage, location: SourceLocation) -> Bool {
         let block: () -> Any? = ({ _ = actualBlock(); return nil })
         let expr = Expression(expression: block, location: location)
 
@@ -141,7 +141,7 @@ public class NMBObjCRaiseExceptionMatcher: NSObject, NMBMatcher {
         ).matches(expr, failureMessage: failureMessage)
     }
 
-    @objc public func doesNotMatch(_ actualBlock: @escaping () -> NSObject!, failureMessage: FailureMessage, location: SourceLocation) -> Bool {
+    @objc public func doesNotMatch(_ actualBlock: @escaping () -> NSObject?, failureMessage: FailureMessage, location: SourceLocation) -> Bool {
         return !matches(actualBlock, failureMessage: failureMessage, location: location)
     }
 

Sources/Nimble/Utils/Stringers.swift

@@ -144,7 +144,9 @@ extension Data: TestOutputStringConvertible {
 ///     will return the result of constructing a string from the value.
 ///
 /// - SeeAlso: `TestOutputStringConvertible`
-public func stringify<T>(_ value: T) -> String {
+public func stringify<T>(_ value: T?) -> String {
+    guard let value = value else { return "nil" }
+
     if let value = value as? TestOutputStringConvertible {
         return value.testDescription
     }
@@ -156,14 +158,6 @@ public func stringify<T>(_ value: T) -> String {
     return String(describing: value)
 }
 
-/// -SeeAlso: `stringify<T>(value: T)`
-public func stringify<T>(_ value: T?) -> String {
-    if let unboxed = value {
-        return stringify(unboxed)
-    }
-    return "nil"
-}
-
 #if os(macOS) || os(iOS) || os(tvOS) || os(watchOS)
 @objc public class NMBStringer: NSObject {
     @objc public class func stringify(_ obj: Any?) -> String {

Sources/NimbleObjectiveC/NMBExceptionCapture.m

@@ -16,7 +16,7 @@ - (nonnull instancetype)initWithHandler:(void(^ _Nullable)(NSException * _Nonnul
     return self;
 }
 
-- (void)tryBlock:(void(^ _Nonnull)(void))unsafeBlock {
+- (void)tryBlock:(__attribute__((noescape)) void(^ _Nonnull)(void))unsafeBlock {
     @try {
         unsafeBlock();
     }