[libclang] Indexing API: Pass an implicit ObjCInterfaceDecl (@implementation without @interface)

in a separate indexing callback than its implementation.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@144625 91177308-0d34-0410-b5e6-96231b3b80d8

tools/libclang/IndexDecl.cpp

@@ -108,6 +108,10 @@ public:
   }
 
   bool VisitObjCImplementationDecl(ObjCImplementationDecl *D) {
+    const ObjCInterfaceDecl *Class = D->getClassInterface();
+    if (Class->isImplicitInterfaceDecl())
+      IndexCtx.handleObjCInterface(Class);
+
     IndexCtx.handleObjCImplementation(D);
 
     IndexCtx.indexTUDeclsInObjCContainer();

tools/libclang/IndexingContext.cpp

@@ -206,9 +206,8 @@ void IndexingContext::handleObjCInterface(const ObjCInterfaceDecl *D) {
 
 void IndexingContext::handleObjCImplementation(
                                               const ObjCImplementationDecl *D) {
-  const ObjCInterfaceDecl *Class = D->getClassInterface();
   ObjCContainerDeclInfo ContDInfo(/*isForwardRef=*/false,
-                      /*isRedeclaration=*/!Class->isImplicitInterfaceDecl(),
+                      /*isRedeclaration=*/true,
                       /*isImplementation=*/true);
   handleObjCContainer(D, D->getLocation(), getCursor(D), ContDInfo);
 }