Merge pull request #864 from apple/revert-839-revert-828-nsobject-operator-static-func

Author: swift-ci

Foundation/NSObject.swift

@@ -323,18 +323,18 @@ open class NSObject : NSObjectProtocol, Equatable, Hashable {
     open var hashValue: Int {
         return hash
     }
-}
 
-/// Returns a Boolean value indicating whether two values are equal.
-///
-/// Equality is the inverse of inequality. For any values `a` and `b`,
-/// `a == b` implies that `a != b` is `false`.
-///
-/// - Parameters:
-///   - lhs: A value to compare.
-///   - rhs: Another value to compare.
-public func ==(lhs: NSObject, rhs: NSObject) -> Bool {
-    return lhs.isEqual(rhs)
+    /// Returns a Boolean value indicating whether two values are equal.
+    ///
+    /// Equality is the inverse of inequality. For any values `a` and `b`,
+    /// `a == b` implies that `a != b` is `false`.
+    ///
+    /// - Parameters:
+    ///   - lhs: A value to compare.
+    ///   - rhs: Another value to compare.
+    public static func ==(lhs: NSObject, rhs: NSObject) -> Bool {
+        return lhs.isEqual(rhs)
+    }
 }
 
 extension NSObject : CustomDebugStringConvertible {