percolate @optional/@required protocols down to ASTs for
properties declared in the protocol.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@50662 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Sema/SemaDeclObjC.cpp b/lib/Sema/SemaDeclObjC.cpp
index afac82c..3b48810 100644
--- a/lib/Sema/SemaDeclObjC.cpp
+++ b/lib/Sema/SemaDeclObjC.cpp
@@ -1022,7 +1022,8 @@
 
 Sema::DeclTy *Sema::ActOnProperty(Scope *S, SourceLocation AtLoc, 
                                   FieldDeclarator &FD,
-                                  ObjCDeclSpec &ODS) {
+                                  ObjCDeclSpec &ODS,
+                                  tok::ObjCKeywordKind MethodImplKind) {
   QualType T = GetTypeForDeclarator(FD.D, S);
   ObjCPropertyDecl *PDecl = ObjCPropertyDecl::Create(Context, AtLoc, 
                                                      FD.D.getIdentifier(), T);
@@ -1055,6 +1056,11 @@
   if (ODS.getPropertyAttributes() & ObjCDeclSpec::DQ_PR_nonatomic)
     PDecl->setPropertyAttributes(ObjCPropertyDecl::OBJC_PR_nonatomic);
   
+  if (MethodImplKind == tok::objc_required)
+    PDecl->setPropertyImplementation(ObjCPropertyDecl::Required);
+  else if (MethodImplKind == tok::objc_optional)
+    PDecl->setPropertyImplementation(ObjCPropertyDecl::Optional);
+  
   return PDecl;
 }