From 91fbd12d8b6e60b72883ff4c42e2a0993087f876 Mon Sep 17 00:00:00 2001
From: Fariborz Jahanian <fjahanian@apple.com>
Date: Mon, 11 Jan 2010 22:48:40 +0000
Subject: [PATCH] Fix rewriting for forward class declaration. (fixes radar
 6969189).

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@93201 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Frontend/RewriteObjC.cpp          | 14 +++++++++++---
 test/Rewriter/rewrite-forward-class.m |  8 ++++++++
 2 files changed, 19 insertions(+), 3 deletions(-)
 create mode 100644 test/Rewriter/rewrite-forward-class.m

diff --git a/lib/Frontend/RewriteObjC.cpp b/lib/Frontend/RewriteObjC.cpp
index 28f79aa10a..e8bb18665b 100644
--- a/lib/Frontend/RewriteObjC.cpp
+++ b/lib/Frontend/RewriteObjC.cpp
@@ -787,9 +787,17 @@ void RewriteObjC::RewriteForwardClassDecl(ObjCClassDecl *ClassDecl) {
   // as the class. As a convenience, we include the original declaration
   // as a comment.
   std::string typedefString;
-  typedefString += "// ";
-  typedefString.append(startBuf, semiPtr-startBuf+1);
-  typedefString += "\n";
+  typedefString += "// @class ";
+  for (ObjCClassDecl::iterator I = ClassDecl->begin(), E = ClassDecl->end();
+       I != E; ++I) {
+    ObjCInterfaceDecl *ForwardDecl = I->getInterface();
+    typedefString += ForwardDecl->getNameAsString();
+    if (I+1 != E)
+      typedefString += ", ";
+    else
+      typedefString += ";\n";
+  }
+  
   for (ObjCClassDecl::iterator I = ClassDecl->begin(), E = ClassDecl->end();
        I != E; ++I) {
     ObjCInterfaceDecl *ForwardDecl = I->getInterface();
diff --git a/test/Rewriter/rewrite-forward-class.m b/test/Rewriter/rewrite-forward-class.m
new file mode 100644
index 0000000000..5a50f53a48
--- /dev/null
+++ b/test/Rewriter/rewrite-forward-class.m
@@ -0,0 +1,8 @@
+// RUN: %clang_cc1 -rewrite-objc -o - %s
+// rdar://6969189
+
+@class XX;
+@class YY, ZZ, QQ;
+@class ISyncClient, SMSession, ISyncManager, ISyncSession, SMDataclassInfo, SMClientInfo,
+    DMCConfiguration, DMCStatusEntry;
+