[analyzer] [RetainCountChecker] [NFC] Another minor cleanup

[NoQ]

Thx.

clang/include/clang/StaticAnalyzer/Core/RetainSummaryManager.h

 using namespace clang;
 using namespace ento;
 
 namespace clang {
 namespace ento {
 
 /// Determines the object kind of a tracked object.
 enum class ObjKind {
-  /// Indicates that the tracked object is a CF object.  This is
-  /// important between GC and non-GC code.
+  /// Indicates that the tracked object is a CF object.
   CF,
+
   /// Indicates that the tracked object is an Objective-C object.
   ObjC,
+
   /// Indicates that the tracked object could be a CF or Objective-C object.
   AnyObj,
+
   /// Indicates that the tracked object is a generalized object.
   Generalized,
 
-  /// A descendant of OSObject.
+  /// Indicates that the tracking object is a descendant of a
+  /// referenced-counted OSObject, used in the Darwin kernel.
   OS
 };
 
 enum ArgEffectKind {
   /// There is no effect.
   DoNothing,
 
   /// The argument is treated as if an -autorelease message had been sent to
   /// the referenced object.
   Autorelease,
 
-  /// The argument is treated as if an -dealloc message had been sent to
-  /// the referenced object.
+  /// The argument is treated as if the referenced object was deallocated.
   Dealloc,
 
-  /// The argument has its reference count decreased by 1.  This is as
-  /// if CFRelease has been called on the argument.
+  /// The argument has its reference count decreased by 1.
   DecRef,
 
   /// The argument has its reference count decreased by 1 to model
   /// a transferred bridge cast under ARC.
   DecRefBridgedTransferred,
 
-  /// The argument has its reference count increased by 1.  This is as
-  /// if CFRetain has been called on the argument.
+  /// The argument has its reference count increased by 1.
   IncRef,
 
   /// The argument is a pointer to a retain-counted object; on exit, the new
   /// value of the pointer is a +0 value or NULL.
   UnretainedOutParameter,
 
   /// The argument is a pointer to a retain-counted object; on exit, the new
   /// value of the pointer is a +1 value or NULL.

 /// RetEffect summarizes a call's retain/release behavior with respect
 /// to its return value.
 class RetEffect {
 public:
   enum Kind {
     /// Indicates that no retain count information is tracked for
     /// the return value.
     NoRet,
+
     /// Indicates that the returned value is an owned (+1) symbol.
     OwnedSymbol,
+
     /// Indicates that the returned value is an object with retain count
     /// semantics but that it is not owned (+0).  This is the default
     /// for getters, etc.
     NotOwnedSymbol,
-    /// Indicates that the object is not owned and controlled by the
-    /// Garbage collector.
-    GCNotOwnedSymbol,
+
     /// Indicates that the return value is an owned object when the
     /// receiver is also a tracked object.
     OwnedWhenTrackedReceiver,
+
     // Treat this function as returning a non-tracked symbol even if
     // the function has been inlined. This is used where the call
     // site summary is more precise than the summary indirectly produced
     // by inlining the function
     NoRetHard
   };
 
-
 private:
   Kind K;
   ObjKind O;
 
   RetEffect(Kind k, ObjKind o = ObjKind::AnyObj) : K(k), O(o) {}
 
 public:
   Kind getKind() const { return K; }
public:
   }
 
   static RetEffect MakeOwned(ObjKind o) {
     return RetEffect(OwnedSymbol, o);
   }
   static RetEffect MakeNotOwned(ObjKind o) {
     return RetEffect(NotOwnedSymbol, o);
   }
-  static RetEffect MakeGCNotOwned() {
-    return RetEffect(GCNotOwnedSymbol, ObjKind::ObjC);
-  }
   static RetEffect MakeNoRet() {
     return RetEffect(NoRet);
   }
   static RetEffect MakeNoRetHard() {
     return RetEffect(NoRetHard);
   }
 };
 
public:
   /// Sets the effect on the receiver of the message.
   void setReceiverEffect(ArgEffect e) { Receiver = e; }
 
   /// getReceiverEffect - Returns the effect on the receiver of the call.
   ///  This is only meaningful if the summary applies to an ObjCMessageExpr*.
   ArgEffect getReceiverEffect() const { return Receiver; }
 
   /// \return the effect on the "this" receiver of the method call.
+  /// This is only meaningful if the summary applies to CXXMethodDecl*.
   ArgEffect getThisEffect() const { return This; }
 
   /// Set the effect of the method on "this".
   void setThisEffect(ArgEffect e) { This = e; }
 
   bool isNoop() const {
     return Ret == RetEffect::MakeNoRet() && Receiver.getKind() == DoNothing
       && DefaultArgEffect.getKind() == MayEscape && This.getKind() == DoNothing

clang/lib/StaticAnalyzer/Core/RetainSummaryManager.cpp

 /// rest of varargs.
 template <class T, class P, class... ToCompare>
 constexpr static bool isOneOf() {
   return std::is_same<T, P>::value || isOneOf<T, ToCompare...>();
 }
 
 namespace {
 
+/// Fake attribute class for RC* attributes.
 struct GeneralizedReturnsRetainedAttr {
   static bool classof(const Attr *A) {
     if (auto AA = dyn_cast<AnnotateAttr>(A))
       return AA->getAnnotation() == "rc_ownership_returns_retained";
     return false;
   }
 };