- Use modern Objective-C syntax.

-  Simplify comparisons.
-  Remove dead stores.

AsyncDisplayKit/ASButtonNode.mm

@@ -271,8 +271,8 @@
 - (void)setTitle:(NSString *)title withFont:(UIFont *)font withColor:(UIColor *)color forState:(ASControlState)state
 {
   NSDictionary *attributes = @{
-                               NSFontAttributeName: font ? font :[UIFont systemFontOfSize:[UIFont buttonFontSize]],
-                               NSForegroundColorAttributeName : color ? color : [UIColor blackColor]
+                               NSFontAttributeName: font ?: [UIFont systemFontOfSize:[UIFont buttonFontSize]],
+                               NSForegroundColorAttributeName : color ?: [UIColor blackColor]
                                };
     
   NSAttributedString *string = [[NSAttributedString alloc] initWithString:title

AsyncDisplayKit/ASControlNode.mm

@@ -257,13 +257,13 @@ static BOOL _enableHitTestDebug = NO;
     {
       // Do we already have an event table for this control event?
       id<NSCopying> eventKey = _ASControlNodeEventKeyForControlEvent(controlEvent);
-      NSMapTable *eventDispatchTable = [_controlEventDispatchTable objectForKey:eventKey];
+      NSMapTable *eventDispatchTable = _controlEventDispatchTable[eventKey];
       // Create it if necessary.
       if (!eventDispatchTable)
       {
         // Create the dispatch table for this event.
         eventDispatchTable = [NSMapTable weakToStrongObjectsMapTable];
-        [_controlEventDispatchTable setObject:eventDispatchTable forKey:eventKey];
+        _controlEventDispatchTable[eventKey] = eventDispatchTable;
       }
 
       // Have we seen this target before for this event?
@@ -291,7 +291,7 @@ static BOOL _enableHitTestDebug = NO;
   ASDN::MutexLocker l(_controlLock);
   
   // Grab the event dispatch table for this event.
-  NSMapTable *eventDispatchTable = [_controlEventDispatchTable objectForKey:_ASControlNodeEventKeyForControlEvent(controlEvent)];
+  NSMapTable *eventDispatchTable = _controlEventDispatchTable[_ASControlNodeEventKeyForControlEvent(controlEvent)];
   if (!eventDispatchTable)
     return nil;
 
@@ -328,7 +328,7 @@ static BOOL _enableHitTestDebug = NO;
     {
       // Grab the dispatch table for this event (if we have it).
       id<NSCopying> eventKey = _ASControlNodeEventKeyForControlEvent(controlEvent);
-      NSMapTable *eventDispatchTable = [_controlEventDispatchTable objectForKey:eventKey];
+      NSMapTable *eventDispatchTable = _controlEventDispatchTable[eventKey];
       if (!eventDispatchTable)
         return;
 
@@ -381,7 +381,7 @@ static BOOL _enableHitTestDebug = NO;
     (ASControlNodeEvent controlEvent)
     {
       // Use a copy to itereate, the action perform could call remove causing a mutation crash.
-      NSMapTable *eventDispatchTable = [[_controlEventDispatchTable objectForKey:_ASControlNodeEventKeyForControlEvent(controlEvent)] copy];
+      NSMapTable *eventDispatchTable = [_controlEventDispatchTable[_ASControlNodeEventKeyForControlEvent(controlEvent)] copy];
 
       // For each target interested in this event...
       for (id target in eventDispatchTable)
@@ -413,7 +413,7 @@ static BOOL _enableHitTestDebug = NO;
 
 id<NSCopying> _ASControlNodeEventKeyForControlEvent(ASControlNodeEvent controlEvent)
 {
-  return [NSNumber numberWithInteger:controlEvent];
+  return @(controlEvent);
 }
 
 void _ASEnumerateControlEventsIncludedInMaskWithBlock(ASControlNodeEvent mask, void (^block)(ASControlNodeEvent anEvent))

AsyncDisplayKit/ASDisplayNode.h

@@ -177,7 +177,7 @@ NS_ASSUME_NONNULL_BEGIN
  * @warning The first access to it must be on the main thread, and should only be used on the main thread thereafter as 
  * well.
  */
-@property (nonatomic, readonly, retain) UIView *view;
+@property (nonatomic, readonly, strong) UIView *view;
 
 /** 
  * @abstract Returns whether a node's backing view or layer is loaded.
@@ -202,7 +202,7 @@ NS_ASSUME_NONNULL_BEGIN
  * @warning The first access to it must be on the main thread, and should only be used on the main thread thereafter as 
  * well.
  */
-@property (nonatomic, readonly, retain) CALayer * _Nonnull layer;
+@property (nonatomic, readonly, strong) CALayer * _Nonnull layer;
 
 /**
  * @abstract Returns the Interface State of the node.
@@ -351,7 +351,7 @@ NS_ASSUME_NONNULL_BEGIN
 /** 
  * @abstract The receiver's immediate subnodes.
  */
-@property (nonatomic, readonly, retain) NSArray<ASDisplayNode *> *subnodes;
+@property (nonatomic, readonly, strong) NSArray<ASDisplayNode *> *subnodes;
 
 /** 
  * @abstract The receiver's supernode.
@@ -617,7 +617,7 @@ NS_ASSUME_NONNULL_END
  */
 - (void)setNeedsLayout;
 
-@property (atomic, retain, nullable) id contents;                           // default=nil
+@property (atomic, strong, nullable) id contents;                           // default=nil
 @property (atomic, assign)           BOOL clipsToBounds;                    // default==NO
 @property (atomic, getter=isOpaque)  BOOL opaque;                           // default==YES
 
@@ -645,9 +645,9 @@ NS_ASSUME_NONNULL_END
  * @discussion In contrast to UIView, setting a transparent color will not set opaque = NO.
  * This only affects nodes that implement +drawRect like ASTextNode.
 */
-@property (atomic, retain, nullable) UIColor *backgroundColor;              // default=nil
+@property (atomic, strong, nullable) UIColor *backgroundColor;              // default=nil
 
-@property (atomic, retain, null_resettable)    UIColor *tintColor;          // default=Blue
+@property (atomic, strong, null_resettable)    UIColor *tintColor;          // default=Blue
 - (void)tintColorDidChange;     // Notifies the node when the tintColor has changed.
 
 /**
@@ -697,7 +697,7 @@ NS_ASSUME_NONNULL_END
 @property (nullable, atomic, copy)   NSString *accessibilityValue;
 @property (atomic, assign)           UIAccessibilityTraits accessibilityTraits;
 @property (atomic, assign)           CGRect accessibilityFrame;
-@property (nullable, atomic, retain) NSString *accessibilityLanguage;
+@property (nullable, atomic, strong) NSString *accessibilityLanguage;
 @property (atomic, assign)           BOOL accessibilityElementsHidden;
 @property (atomic, assign)           BOOL accessibilityViewIsModal;
 @property (atomic, assign)           BOOL shouldGroupAccessibilityChildren;

AsyncDisplayKit/ASDisplayNode.mm

@@ -224,7 +224,7 @@ static ASDisplayNodeMethodOverrides GetASDisplayNodeMethodOverrides(Class c)
       if (isQueueDrained) {
         [[NSNotificationCenter defaultCenter] postNotificationName:ASRenderingEngineDidDisplayScheduledNodesNotification
                                                             object:nil
-                                                          userInfo:@{ASRenderingEngineDidDisplayNodesScheduledBeforeTimestamp: [NSNumber numberWithDouble:timestamp]}];
+                                                          userInfo:@{ASRenderingEngineDidDisplayNodesScheduledBeforeTimestamp: @(timestamp)}];
       }
     }];
   });
@@ -1061,7 +1061,7 @@ static inline CATransform3D _calculateTransformFromReferenceToTarget(ASDisplayNo
 {
   ASDisplayNodeAssertThreadAffinity(self);
   // Get root node of the accessible node hierarchy, if node not specified
-  node = node ? node : ASDisplayNodeUltimateParentOfNode(self);
+  node = node ?: ASDisplayNodeUltimateParentOfNode(self);
 
   // Calculate transform to map points between coordinate spaces
   CATransform3D nodeTransform = _calculateTransformFromReferenceToTarget(node, self);
@@ -1076,7 +1076,7 @@ static inline CATransform3D _calculateTransformFromReferenceToTarget(ASDisplayNo
 {
   ASDisplayNodeAssertThreadAffinity(self);
   // Get root node of the accessible node hierarchy, if node not specified
-  node = node ? node : ASDisplayNodeUltimateParentOfNode(self);
+  node = node ?: ASDisplayNodeUltimateParentOfNode(self);
 
   // Calculate transform to map points between coordinate spaces
   CATransform3D nodeTransform = _calculateTransformFromReferenceToTarget(self, node);
@@ -1091,7 +1091,7 @@ static inline CATransform3D _calculateTransformFromReferenceToTarget(ASDisplayNo
 {
   ASDisplayNodeAssertThreadAffinity(self);
   // Get root node of the accessible node hierarchy, if node not specified
-  node = node ? node : ASDisplayNodeUltimateParentOfNode(self);
+  node = node ?: ASDisplayNodeUltimateParentOfNode(self);
 
   // Calculate transform to map points between coordinate spaces
   CATransform3D nodeTransform = _calculateTransformFromReferenceToTarget(node, self);
@@ -1106,7 +1106,7 @@ static inline CATransform3D _calculateTransformFromReferenceToTarget(ASDisplayNo
 {
   ASDisplayNodeAssertThreadAffinity(self);
   // Get root node of the accessible node hierarchy, if node not specified
-  node = node ? node : ASDisplayNodeUltimateParentOfNode(self);
+  node = node ?: ASDisplayNodeUltimateParentOfNode(self);
 
   // Calculate transform to map points between coordinate spaces
   CATransform3D nodeTransform = _calculateTransformFromReferenceToTarget(self, node);
@@ -2085,11 +2085,7 @@ void recursivelyTriggerDisplayForLayer(CALayer *layer, BOOL shouldBlock)
   BOOL wasVisible = ASInterfaceStateIncludesVisible(oldState);
 
   if (nowVisible != wasVisible) {
-    if (nowVisible) {
-      [self visibilityDidChange:YES];
-    } else {
-      [self visibilityDidChange:NO];
-    }
+    [self visibilityDidChange:nowVisible];
   }
   
   [self interfaceStateDidChange:newState fromState:oldState];
@@ -2513,7 +2509,7 @@ static const char *ASDisplayNodeDrawingPriorityKey = "ASDrawingPriority";
     objc_setAssociatedObject(self, ASDisplayNodeDrawingPriorityKey, nil, OBJC_ASSOCIATION_ASSIGN);
   } else {
     _flags.hasCustomDrawingPriority = YES;
-    objc_setAssociatedObject(self, ASDisplayNodeDrawingPriorityKey, [NSNumber numberWithInteger:drawingPriority], OBJC_ASSOCIATION_RETAIN);
+    objc_setAssociatedObject(self, ASDisplayNodeDrawingPriorityKey, @(drawingPriority), OBJC_ASSOCIATION_RETAIN);
   }
 }
 

AsyncDisplayKit/ASEqualityHashHelpers.mm

@@ -10,11 +10,6 @@
 
 #import "ASEqualityHashHelpers.h"
 
-#import <functional>
-#import <objc/runtime.h>
-#import <stdio.h>
-#import <string>
-
 NSUInteger ASIntegerArrayHash(const NSUInteger *subhashes, NSUInteger count)
 {
   uint64_t result = subhashes[0];

AsyncDisplayKit/ASImageNode.h

@@ -33,7 +33,7 @@ typedef UIImage * _Nullable (^asimagenode_modification_block_t)(UIImage *image);
  * the layer's contentsCenter property.  Non-stretchable images work too, of
  * course.
  */
-@property (nullable, atomic, retain) UIImage *image;
+@property (nullable, atomic, strong) UIImage *image;
 
 /**
  @abstract The placeholder color.

AsyncDisplayKit/ASImageNode.mm

@@ -28,7 +28,7 @@
 @property (nonatomic, assign) BOOL opaque;
 @property (nonatomic, assign) CGRect bounds;
 @property (nonatomic, assign) CGFloat contentsScale;
-@property (nonatomic, retain) UIColor *backgroundColor;
+@property (nonatomic, strong) UIColor *backgroundColor;
 @property (nonatomic, assign) UIViewContentMode contentMode;
 
 @end

AsyncDisplayKit/ASRunLoopQueue.mm

@@ -53,7 +53,6 @@
 {
   std::deque<id> itemsToProcess = std::deque<id>();
   BOOL isQueueDrained = NO;
-  CFAbsoluteTime timestamp = 0;
   {
     ASDN::MutexLocker l(_internalQueueLock);
 
@@ -72,7 +71,6 @@
 
     if (_internalQueue.empty()) {
       isQueueDrained = YES;
-      timestamp = CFAbsoluteTimeGetCurrent();
     }
   }
 

AsyncDisplayKit/ASTableView.mm

@@ -118,13 +118,13 @@ static NSString * const kCellReuseIdentifier = @"_ASTableViewCell";
 }
 
 @property (atomic, assign) BOOL asyncDataSourceLocked;
-@property (nonatomic, retain, readwrite) ASDataController *dataController;
+@property (nonatomic, strong, readwrite) ASDataController *dataController;
 
 // Used only when ASTableView is created directly rather than through ASTableNode.
 // We create a node so that logic related to appearance, memory management, etc can be located there
 // for both the node-based and view-based version of the table.
 // This also permits sharing logic with ASCollectionNode, as the superclass is not UIKit-controlled.
-@property (nonatomic, retain) ASTableNode *strongTableNode;
+@property (nonatomic, strong) ASTableNode *strongTableNode;
 
 // Always set, whether ASCollectionView is created directly or via ASCollectionNode.
 @property (nonatomic, weak)   ASTableNode *tableNode;

AsyncDisplayKit/ASTableViewInternal.h

@@ -12,7 +12,7 @@
 
 @interface ASTableView (Internal)
 
-@property (nonatomic, retain, readonly) ASDataController *dataController;
+@property (nonatomic, strong, readonly) ASDataController *dataController;
 @property (nonatomic, weak, readwrite) ASTableNode *tableNode;
 @property (nonatomic, strong, readonly) ASRangeController *rangeController;
 

AsyncDisplayKit/ASTextNode.mm

@@ -475,7 +475,6 @@ static NSArray *DefaultLinkAttributeNames = @[ NSLinkAttributeName ];
 
   // Final output vars
   __block id linkAttributeValue = nil;
-  __block NSString *linkAttributeName = nil;
   __block BOOL inTruncationMessage = NO;
 
   [renderer enumerateTextIndexesAtPosition:point usingBlock:^(NSUInteger characterIndex, CGRect glyphBoundingRect, BOOL *stop) {
@@ -544,7 +543,6 @@ static NSArray *DefaultLinkAttributeNames = @[ NSLinkAttributeName ];
 
         // Set the values for the next iteration
         linkAttributeValue = value;
-        linkAttributeName = name;
 
         break;
       }

AsyncDisplayKit/ASVideoNode.mm

@@ -80,14 +80,14 @@
 
 - (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary *)change context:(void *)context
 {
-  if ([[change objectForKey:@"new"] integerValue] == AVPlayerItemStatusReadyToPlay) {
+  if ([change[@"new"] integerValue] == AVPlayerItemStatusReadyToPlay) {
     if ([self.subnodes containsObject:_spinner]) {
       [_spinner removeFromSupernode];
       _spinner = nil;
     }
   }
   
-  if ([[change objectForKey:@"new"] integerValue] == AVPlayerItemStatusFailed) {
+  if ([change[@"new"] integerValue] == AVPlayerItemStatusFailed) {
     
   }
 }

AsyncDisplayKit/Details/ASCollectionViewFlowLayoutInspector.m

@@ -104,11 +104,7 @@
 - (BOOL)layoutHasSupplementaryViewOfKind:(NSString *)kind inSection:(NSUInteger)section collectionView:(ASCollectionView *)collectionView
 {
   CGSize size = [self sizeForSupplementaryViewOfKind:kind inSection:section collectionView:collectionView];
-  if ([self usedLayoutValueForSize:size] > 0) {
-    return YES;
-  } else {
-    return NO;
-  }
+  return [self usedLayoutValueForSize:size] > 0;
 }
 
 - (CGFloat)usedLayoutValueForSize:(CGSize)size

AsyncDisplayKit/Details/ASDataController.mm

@@ -876,12 +876,12 @@ static void *kASSizingQueueContext = &kASSizingQueueContext;
     
     [_editingTransactionQueue addOperationWithBlock:^{
       LOG(@"Edit Transaction - moveRow: %@ > %@", indexPath, newIndexPath);
-      NSArray *nodes = ASFindElementsInMultidimensionalArrayAtIndexPaths(_editingNodes[ASDataControllerRowNodeKind], [NSArray arrayWithObject:indexPath]);
-      NSArray *indexPaths = [NSArray arrayWithObject:indexPath];
+      NSArray *nodes = ASFindElementsInMultidimensionalArrayAtIndexPaths(_editingNodes[ASDataControllerRowNodeKind], @[indexPath]);
+      NSArray *indexPaths = @[indexPath];
       [self _deleteNodesAtIndexPaths:indexPaths withAnimationOptions:animationOptions];
 
       // Don't re-calculate size for moving
-      NSArray *newIndexPaths = [NSArray arrayWithObject:newIndexPath];
+      NSArray *newIndexPaths = @[newIndexPath];
       [self _insertNodes:nodes atIndexPaths:newIndexPaths withAnimationOptions:animationOptions];
     }];
   }];
@@ -967,7 +967,7 @@ static void *kASSizingQueueContext = &kASSizingQueueContext;
 - (NSArray *)completedNodes
 {
   ASDisplayNodeAssertMainThread();
-  return _externalCompletedNodes != nil ? _externalCompletedNodes : _completedNodes[ASDataControllerRowNodeKind];
+  return _externalCompletedNodes ?: _completedNodes[ASDataControllerRowNodeKind];
 }
 
 #pragma mark - Dealloc

AsyncDisplayKit/Details/ASMainSerialQueue.mm

@@ -45,7 +45,7 @@
       ASDN::MutexLocker l(_serialQueueLock);
       dispatch_block_t block;
       if (_blocks.count > 0) {
-        block = [_blocks objectAtIndex:0];
+        block = _blocks[0];
         [_blocks removeObjectAtIndex:0];
       } else {
         break;

AsyncDisplayKit/Details/ASRangeController.mm

@@ -286,13 +286,13 @@ static UIApplicationState __ApplicationState = UIApplicationStateActive;
       if (section != currentSectionIndex) {
         // Often we'll be dealing with indexPaths in the same section, but the set isn't sorted and we may even bounce
         // between the same ones.  Still, this saves dozens of method calls to access the inner array and count.
-        currentSectionNodes = [allNodes objectAtIndex:section];
+        currentSectionNodes = allNodes[section];
         numberOfNodesInSection = [currentSectionNodes count];
         currentSectionIndex = section;
       }
       
       if (row < numberOfNodesInSection) {
-        ASDisplayNode *node = [currentSectionNodes objectAtIndex:row];
+        ASDisplayNode *node = currentSectionNodes[row];
         
         ASDisplayNodeAssert(node.hierarchyState & ASHierarchyStateRangeManaged, @"All nodes reaching this point should be range-managed, or interfaceState may be incorrectly reset.");
         // Skip the many method calls of the recursive operation if the top level cell node already has the right interfaceState.
@@ -345,7 +345,7 @@ static UIApplicationState __ApplicationState = UIApplicationStateActive;
 
 - (void)scheduledNodesDidDisplay:(NSNotification *)notification
 {
-  CFAbsoluteTime notificationTimestamp = ((NSNumber *)[notification.userInfo objectForKey:ASRenderingEngineDidDisplayNodesScheduledBeforeTimestamp]).doubleValue;
+  CFAbsoluteTime notificationTimestamp = ((NSNumber *) notification.userInfo[ASRenderingEngineDidDisplayNodesScheduledBeforeTimestamp]).doubleValue;
   if (_pendingDisplayNodesTimestamp < notificationTimestamp) {
     // The rendering engine has processed all the nodes this range controller scheduled. Let's schedule a range update
     [[NSNotificationCenter defaultCenter] removeObserver:self name:ASRenderingEngineDidDisplayScheduledNodesNotification object:nil];

AsyncDisplayKit/Details/Transactions/_ASAsyncTransaction.mm

@@ -18,7 +18,7 @@ NSInteger const ASDefaultTransactionPriority = 0;
 @interface ASDisplayNodeAsyncTransactionOperation : NSObject
 - (id)initWithOperationCompletionBlock:(asyncdisplaykit_async_transaction_operation_completion_block_t)operationCompletionBlock;
 @property (nonatomic, copy) asyncdisplaykit_async_transaction_operation_completion_block_t operationCompletionBlock;
-@property (atomic, retain) id<NSObject> value; // set on bg queue by the operation block
+@property (atomic, strong) id<NSObject> value; // set on bg queue by the operation block
 @end
 
 @implementation ASDisplayNodeAsyncTransactionOperation
@@ -236,7 +236,7 @@ void ASAsyncTransactionQueue::GroupImpl::schedule(NSInteger priority, dispatch_q
             operation._block();
           }
           operation._group->leave();
-          operation._block = 0; // the block must be freed while mutex is unlocked
+          operation._block = nil; // the block must be freed while mutex is unlocked
         }
       }
       --entry._threadCount;

AsyncDisplayKit/Details/Transactions/_ASAsyncTransactionContainer+Private.h

@@ -10,8 +10,8 @@
 
 
 @interface CALayer (ASAsyncTransactionContainerTransactions)
-@property (nonatomic, retain, setter=asyncdisplaykit_setAsyncLayerTransactions:) NSHashTable *asyncdisplaykit_asyncLayerTransactions;
-@property (nonatomic, retain, setter=asyncdisplaykit_setCurrentAsyncLayerTransaction:) _ASAsyncTransaction *asyncdisplaykit_currentAsyncLayerTransaction;
+@property (nonatomic, strong, setter=asyncdisplaykit_setAsyncLayerTransactions:) NSHashTable *asyncdisplaykit_asyncLayerTransactions;
+@property (nonatomic, strong, setter=asyncdisplaykit_setCurrentAsyncLayerTransaction:) _ASAsyncTransaction *asyncdisplaykit_currentAsyncLayerTransaction;
 
 - (void)asyncdisplaykit_asyncTransactionContainerWillBeginTransaction:(_ASAsyncTransaction *)transaction;
 - (void)asyncdisplaykit_asyncTransactionContainerDidCompleteTransaction:(_ASAsyncTransaction *)transaction;

AsyncDisplayKit/Details/Transactions/_ASAsyncTransactionContainer.h

@@ -59,13 +59,13 @@ typedef NS_ENUM(NSUInteger, ASAsyncTransactionContainerState) {
  did not already exist. This method will always return an open, uncommitted transaction.
  @desc asyncdisplaykit_isAsyncTransactionContainer does not need to be YES for this to return a transaction.
  */
-@property (nonatomic, readonly, retain) _ASAsyncTransaction *asyncdisplaykit_asyncTransaction;
+@property (nonatomic, readonly, strong) _ASAsyncTransaction *asyncdisplaykit_asyncTransaction;
 
 /**
  @summary Goes up the superlayer chain until it finds the first layer with asyncdisplaykit_isAsyncTransactionContainer=YES (including the receiver) and returns it.
  Returns nil if no parent container is found.
  */
-@property (nonatomic, readonly, retain) CALayer *asyncdisplaykit_parentTransactionContainer;
+@property (nonatomic, readonly, strong) CALayer *asyncdisplaykit_parentTransactionContainer;
 @end
 
 @interface UIView (ASDisplayNodeAsyncTransactionContainer) <ASDisplayNodeAsyncTransactionContainer>

AsyncDisplayKit/Details/UIView+ASConvenience.h

@@ -20,20 +20,20 @@ NS_ASSUME_NONNULL_BEGIN
 @property (nonatomic, assign) CGPoint position;
 @property (nonatomic, assign) CGFloat zPosition;
 @property (nonatomic, assign) CGPoint anchorPoint;
-@property (nullable, nonatomic, retain) id contents;
+@property (nullable, nonatomic, strong) id contents;
 @property (nonatomic, assign) CGFloat cornerRadius;
 @property (nonatomic, assign) CGFloat contentsScale;
 @property (nonatomic, assign) CATransform3D transform;
 @property (nonatomic, assign) CATransform3D sublayerTransform;
 @property (nonatomic, assign) BOOL needsDisplayOnBoundsChange;
-@property (nonatomic, retain) __attribute__((NSObject)) CGColorRef shadowColor;
+@property (nonatomic, strong) __attribute__((NSObject)) CGColorRef shadowColor;
 @property (nonatomic, assign) CGFloat shadowOpacity;
 @property (nonatomic, assign) CGSize shadowOffset;
 @property (nonatomic, assign) CGFloat shadowRadius;
 @property (nonatomic, assign) CGFloat borderWidth;
 @property (nonatomic, assign, getter = isOpaque) BOOL opaque;
-@property (nonatomic, retain) __attribute__((NSObject)) CGColorRef borderColor;
-@property (nonatomic, retain) __attribute__((NSObject)) CGColorRef backgroundColor;
+@property (nonatomic, strong) __attribute__((NSObject)) CGColorRef borderColor;
+@property (nonatomic, strong) __attribute__((NSObject)) CGColorRef backgroundColor;
 @property (nonatomic, assign) BOOL allowsEdgeAntialiasing;
 @property (nonatomic, assign) unsigned int edgeAntialiasingMask;
 
@@ -51,7 +51,7 @@ NS_ASSUME_NONNULL_BEGIN
 @property (nonatomic, getter=isHidden)  		BOOL hidden;
 @property (nonatomic, assign)           		BOOL autoresizesSubviews;
 @property (nonatomic, assign)           		UIViewAutoresizing autoresizingMask;
-@property (nonatomic, retain, null_resettable)  UIColor *tintColor;
+@property (nonatomic, strong, null_resettable)  UIColor *tintColor;
 @property (nonatomic, assign)           		CGFloat alpha;
 @property (nonatomic, assign)           		CGRect bounds;
 @property (nonatomic, assign)           		CGRect frame;   // Only for use with nodes wrapping synchronous views
@@ -71,7 +71,7 @@ NS_ASSUME_NONNULL_BEGIN
  @property (atomic, copy)             NSString *accessibilityValue;
  @property (atomic, assign)           UIAccessibilityTraits accessibilityTraits;
  @property (atomic, assign)           CGRect accessibilityFrame;
- @property (atomic, retain)           NSString *accessibilityLanguage;
+ @property (atomic, strong)           NSString *accessibilityLanguage;
  @property (atomic, assign)           BOOL accessibilityElementsHidden;
  @property (atomic, assign)           BOOL accessibilityViewIsModal;
  @property (atomic, assign)           BOOL shouldGroupAccessibilityChildren;

AsyncDisplayKit/Details/_ASDisplayView.mm

@@ -23,7 +23,7 @@
 
 // Keep the node alive while its view is active.  If you create a view, add its layer to a layer hierarchy, then release
 // the view, the layer retains the view to prevent a crash.  This replicates this behaviour for the node abstraction.
-@property (nonatomic, retain, readwrite) ASDisplayNode *keepalive_node;
+@property (nonatomic, strong, readwrite) ASDisplayNode *keepalive_node;
 @end
 
 @implementation _ASDisplayView

AsyncDisplayKit/Layout/ASDimension.mm

@@ -100,7 +100,7 @@ struct _Range {
   {
   CGFloat newMin = MAX(min, other.min);
   CGFloat newMax = MIN(max, other.max);
-  if (!(newMin > newMax)) {
+  if (newMin <= newMax) {
     return {newMin, newMax};
   } else {
     // No intersection. If we're before the other range, return our max; otherwise our min.

AsyncDisplayKit/Private/ASDisplayNodeInternal.h

@@ -139,7 +139,7 @@ FOUNDATION_EXPORT NSString * const ASRenderingEngineDidDisplayNodesScheduledBefo
 + (void)scheduleNodeForRecursiveDisplay:(ASDisplayNode *)node;
 
 // The _ASDisplayLayer backing the node, if any.
-@property (nonatomic, readonly, retain) _ASDisplayLayer *asyncLayer;
+@property (nonatomic, readonly, strong) _ASDisplayLayer *asyncLayer;
 
 // Bitmask to check which methods an object overrides.
 @property (nonatomic, assign, readonly) ASDisplayNodeMethodOverrides methodOverrides;

AsyncDisplayKit/TextKit/ASTextKitAttributes.h

@@ -24,7 +24,7 @@ extern NSString *const ASTextKitEntityAttributeName;
 
 static inline BOOL _objectsEqual(id<NSObject> obj1, id<NSObject> obj2)
 {
-  return obj1 == obj2 ? YES : [obj1 isEqual:obj2];
+  return obj1 == obj2 || [obj1 isEqual:obj2];
 }
 
 /**

Base/ASEqualityHelpers.h

@@ -16,7 +16,5 @@
  */
 ASDISPLAYNODE_INLINE BOOL ASObjectIsEqual(id<NSObject> obj, id<NSObject> otherObj)
 {
-  if (obj == otherObj)
-    return YES;
-  return [obj isEqual:otherObj];
+  return obj == otherObj || [obj isEqual:otherObj];
 }