Introduce the notion of literal types, as specified in C++0x.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@90361 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Parse/ParseExprCXX.cpp b/lib/Parse/ParseExprCXX.cpp
index 52003e6..4eb6cd5 100644
--- a/lib/Parse/ParseExprCXX.cpp
+++ b/lib/Parse/ParseExprCXX.cpp
@@ -1459,6 +1459,7 @@
   case tok::kw___is_pod:                  return UTT_IsPOD;
   case tok::kw___is_polymorphic:          return UTT_IsPolymorphic;
   case tok::kw___is_union:                return UTT_IsUnion;
+  case tok::kw___is_literal:              return UTT_IsLiteral;
   }
 }