Parser support for C++ using directives, from Piotr Rak

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@61486 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Parse/ParseDecl.cpp b/lib/Parse/ParseDecl.cpp
index 23c0c61..a410dfe 100644
--- a/lib/Parse/ParseDecl.cpp
+++ b/lib/Parse/ParseDecl.cpp
@@ -216,6 +216,8 @@
 ///           others                   [FIXME]
 /// [C++]   template-declaration
 /// [C++]   namespace-definition
+/// [C++]   using-directive
+/// [C++]   using-declaration [TODO]
 ///         others... [FIXME]
 ///
 Parser::DeclTy *Parser::ParseDeclaration(unsigned Context) {
@@ -225,6 +227,8 @@
     return ParseTemplateDeclaration(Context);
   case tok::kw_namespace:
     return ParseNamespace(Context);
+  case tok::kw_using:
+    return ParseUsingDirectiveOrDeclaration(Context);
   default:
     return ParseSimpleDeclaration(Context);
   }