Migrate from the removed unsafeAddress(of:) API. (swiftlang#475)

Author: swiftix

Foundation/NSCFString.swift

@@ -59,12 +59,12 @@ internal class _NSCFString : NSMutableString {
 
 internal final class _NSCFConstantString : _NSCFString {
     internal var _ptr : UnsafePointer<UInt8> {
-        let ptr = unsafeAddress(of: self) + sizeof(OpaquePointer.self) + sizeof(Int32.self) + sizeof(Int32.self) + sizeof(_CFInfo.self)
+        let ptr = Unmanaged.passUnretained(self).toOpaque() + sizeof(OpaquePointer.self) + sizeof(Int32.self) + sizeof(Int32.self) + sizeof(_CFInfo.self)
         return UnsafePointer<UnsafePointer<UInt8>>(ptr).pointee
     }
     internal var _length : UInt32 {
         let offset = sizeof(OpaquePointer.self) + sizeof(Int32.self) + sizeof(Int32.self) + sizeof(_CFInfo.self) + sizeof(UnsafePointer<UInt8>.self)
-        let ptr = unsafeAddress(of: self) + offset
+        let ptr = Unmanaged.passUnretained(self).toOpaque() + offset
         return UnsafePointer<UInt32>(ptr).pointee
     }
 

Foundation/NSNotification.swift

@@ -85,7 +85,7 @@ public class NSNotification: NSObject, NSCopying, NSCoding {
     }
 
     public override var description: String {
-        var str = "\(self.dynamicType) \(unsafeAddress(of: self)) {"
+        var str = "\(self.dynamicType) \(Unmanaged.passUnretained(self).toOpaque()) {"
 
         str += "name = \(self.name.rawValue)"
         if let object = self.object {

Foundation/NSObject.swift

@@ -100,7 +100,7 @@ public class NSObject : NSObjectProtocol, Equatable, Hashable {
     }
 
     public var description: String {
-        return "<\(self.dynamicType): \(unsafeAddress(of: self))>"
+        return "<\(self.dynamicType): \(Unmanaged.passUnretained(self).toOpaque())>"
     }
 
     public var debugDescription: String {

Foundation/NSOperation.swift

@@ -324,7 +324,7 @@ public class OperationQueue: NSObject {
             if let requestedName = _name {
                 effectiveName = requestedName
             } else {
-                effectiveName = "NSOperationQueue::\(unsafeAddress(of: self))"
+                effectiveName = "NSOperationQueue::\(Unmanaged.passUnretained(self).toOpaque())"
             }
             let attr: DispatchQueueAttributes
             if maxConcurrentOperationCount == 1 {

Foundation/NSURLResponse.swift

@@ -232,7 +232,7 @@ public class NSHTTPURLResponse : URLResponse {
     /// A string that represents the contents of the NSHTTPURLResponse Object.
     /// This property is intended to produce readable output.
     override public var description: String {
-        var result = "<\(self.dynamicType) \(unsafeAddress(of: self))> { URL: \(url!.absoluteString) }{ status: \(statusCode), headers {\n"
+        var result = "<\(self.dynamicType) \(Unmanaged.passUnretained(self).toOpaque())> { URL: \(url!.absoluteString) }{ status: \(statusCode), headers {\n"
         for(key, value) in allHeaderFields {
             if((key.lowercased() == "content-disposition" && suggestedFilename != "Unknown") || key.lowercased() == "content-type") {
                 result += "   \"\(key)\" = \"\(value)\";\n"