Objective-C parsing [qoi]: Recover gracefully with good diagnostic

when class implementation declaration adds protocol qualifier
list. // rdar://12233858


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@180228 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 7 insertions, 0 deletions

diff --git a/lib/Parse/ParseObjc.cpp b/lib/Parse/ParseObjc.cpp
index 23afa4ff3d..aa9c05ec7f 100644
--- a/lib/Parse/ParseObjc.cpp
+++ b/lib/Parse/ParseObjc.cpp
@@ -1565,6 +1565,13 @@ Parser::ParseObjCAtImplementationDeclaration(SourceLocation AtLoc) {
   
     if (Tok.is(tok::l_brace)) // we have ivars
       ParseObjCClassInstanceVariables(ObjCImpDecl, tok::objc_private, AtLoc);
+    else if (Tok.is(tok::less)) { // we have illegal '<' try to recover
+      Diag(Tok, diag::err_unexpected_protocol_qualifier);
+      // try to recover.
+      AttributeFactory attr;
+      DeclSpec DS(attr);
+      (void)ParseObjCProtocolQualifiers(DS);
+    }
   }
   assert(ObjCImpDecl);