Fix NS_OPTION parameter label transformation for multi-word suffixes

When Objective-c methods are imported into Swift, the labels are
transforms to remove suffixes based on the type of the parameter. Due
to the structure of NS_OPTION when importing in C++ mode, there is
some special handling for this case introduced in PR swiftlang#59421.

This patch fixes some of this hanlding for when a multi-word suffix
needs removing, specifically 'ControlEvents' and 'ScrollPosition'.

Author: NuriAmari

lib/ClangImporter/ImportType.cpp

@@ -2588,7 +2588,10 @@ ArgumentAttrs ClangImporter::Implementation::inferDefaultArgument(
       // behave like a C enum in the presence of C++.
       auto enumName = typedefType->getDecl()->getName();
       ArgumentAttrs argumentAttrs(DefaultArgumentKind::None, true, enumName);
-      for (auto word : llvm::reverse(camel_case::getWords(enumName))) {
+      auto camelCaseWords = camel_case::getWords(enumName);
+      for (auto it = camelCaseWords.rbegin(); it != camelCaseWords.rend(); ++it) {
+        auto word = *it;
+        auto next = std::next(it);
         if (camel_case::sameWordIgnoreFirstCase(word, "options")) {
           argumentAttrs.argumentKind = DefaultArgumentKind::EmptyArray;
           return argumentAttrs;
@@ -2599,13 +2602,13 @@ ArgumentAttrs ClangImporter::Implementation::inferDefaultArgument(
           return argumentAttrs;
         if (camel_case::sameWordIgnoreFirstCase(word, "action"))
           return argumentAttrs;
-        if (camel_case::sameWordIgnoreFirstCase(word, "controlevents"))
+        if (camel_case::sameWordIgnoreFirstCase(word, "events") && next != camelCaseWords.rend() && camel_case::sameWordIgnoreFirstCase(*next, "control"))
           return argumentAttrs;
         if (camel_case::sameWordIgnoreFirstCase(word, "state"))
           return argumentAttrs;
         if (camel_case::sameWordIgnoreFirstCase(word, "unit"))
           return argumentAttrs;
-        if (camel_case::sameWordIgnoreFirstCase(word, "scrollposition"))
+        if (camel_case::sameWordIgnoreFirstCase(word, "position") && next != camelCaseWords.rend() && camel_case::sameWordIgnoreFirstCase(*next, "scroll"))
           return argumentAttrs;
         if (camel_case::sameWordIgnoreFirstCase(word, "edge"))
           return argumentAttrs;

test/Interop/Cxx/enum/Inputs/c-enums-withOptions-omit.h

@@ -28,11 +28,23 @@ enum : UIControlState { UIControlState1, UIControlState2 };
 typedef int __attribute__((availability(swift, unavailable))) UITableViewCellStateMask;
 enum : UITableViewCellStateMask { UITableViewCellStateMask1, UITableViewCellStateMask2 };
 
+typedef int __attribute__((availability(swift, unavailable))) UIControlEvents;
+enum : UIControlEvents { UIControlEvents1, UIControlEvents2 };
+
+typedef int __attribute__((availability(swift, unavailable))) UITableViewScrollPosition;
+enum : UITableViewScrollPosition { UITableViewScrollPosition1, UITableViewScrollPosition2 };
+
+@interface NSIndexPath
+@end
+typedef signed char BOOL;
+
 @interface TestsForEnhancedOmitNeedlessWords
 - (void)differenceFromArray:(int)other withOptions:(NSOrderedCollectionDifferenceCalculationOptions)options ;
 - (unsigned)minimumRangeOfUnit:(NSCalendarUnit)unit;
 - (unsigned)URLForDirectory:(unsigned)directory inDomain:(NSSearchPathDomainMask)domain ;
 - (unsigned)layoutManager:(unsigned)layoutManager shouldUseAction:(NSControlCharacterAction)action ;
 - (void)setBackButtonBackgroundImage:(unsigned)backgroundImage forState:(UIControlState)state ;
 - (void)willTransitionToState:(UITableViewCellStateMask)state ;
+- (void)addTarget:(nullable id)target action:(SEL)action forControlEvents:(UIControlEvents)controlEvents;
+- (void)scrollToRowAtIndexPath:(NSIndexPath *)indexPath atScrollPosition:(UITableViewScrollPosition)scrollPosition animated:(BOOL)animated;
 @end

test/Interop/Cxx/enum/c-enums-withOptions-omit.swift

@@ -56,4 +56,20 @@ import CenumsWithOptionsOmit
 // CHECK-NEXT: @available(swift, obsoleted: 3, renamed: "willTransition(to:)")
 // CHECK-NEXT: class func willTransitionToState(_ state: UITableViewCellStateMask)
 // CHECK-NEXT: @available(swift, obsoleted: 3, renamed: "willTransition(to:)")
-// CHECK-NEXT: func willTransitionToState(_ state: UITableViewCellStateMask)
+// CHECK-NEXT: func willTransitionToState(_ state: UITableViewCellStateMask)
+
+// Tests for forControlEvents -> 'for controlEvents'
+// CHECK-NEXT: class func addTarget(_ target: Any?, action: OpaquePointer!, for controlEvents: UIControlEvents)
+// CHECK-NEXT: func addTarget(_ target: Any?, action: OpaquePointer!, for controlEvents: UIControlEvents)
+// CHECK-NEXT: @available(swift, obsoleted: 3, renamed: "addTarget(_:action:for:)")
+// CHECK-NEXT: class func addTarget(_ target: Any?, action: OpaquePointer!, forControlEvents controlEvents: UIControlEvents)
+// CHECK-NEXT: @available(swift, obsoleted: 3, renamed: "addTarget(_:action:for:)")
+// CHECK-NEXT: func addTarget(_ target: Any?, action: OpaquePointer!, forControlEvents controlEvents: UIControlEvents)
+
+// Tests for atScrollPosition -> 'at atScrollPosition'
+// CHECK-NEXT: class func scrollToRow(at indexPath: NSIndexPath!, at scrollPosition: UITableViewScrollPosition, animated: BOOL)
+// CHECK-NEXT: func scrollToRow(at indexPath: NSIndexPath!, at scrollPosition: UITableViewScrollPosition, animated: BOOL)
+// CHECK-NEXT: @available(swift, obsoleted: 3, renamed: "scrollToRow(at:at:animated:)")
+// CHECK-NEXT: class func scrollToRowAtIndexPath(_ indexPath: NSIndexPath!, atScrollPosition scrollPosition: UITableViewScrollPosition, animated: BOOL)
+// CHECK-NEXT: @available(swift, obsoleted: 3, renamed: "scrollToRow(at:at:animated:)")
+// CHECK-NEXT: func scrollToRowAtIndexPath(_ indexPath: NSIndexPath!, atScrollPosition scrollPosition: UITableViewScrollPosition, animated: BOOL)