1 files changed, 18 insertions, 0 deletions
diff --git a/include/clang/Parse/Parser.h b/include/clang/Parse/Parser.h
index d613ae1..75458d8 100644
--- a/include/clang/Parse/Parser.h
+++ b/include/clang/Parse/Parser.h
@@ -105,6 +105,24 @@ class Parser {
     }
   };
 
+  /// \brief RAII object that enters an unevaluated operand.
+  class EnterUnevaluatedOperand {    
+    /// \brief The action object.
+    Action &Actions;
+    
+    /// \brief Whether we were previously within an unevaluated operand.
+    bool PreviouslyInUnevaluatedOperand;
+    
+  public:
+    explicit EnterUnevaluatedOperand(Action &Actions) : Actions(Actions) { 
+      PreviouslyInUnevaluatedOperand = Actions.setUnevaluatedOperand(true);
+    }
+    
+    ~EnterUnevaluatedOperand() {
+      Actions.setUnevaluatedOperand(PreviouslyInUnevaluatedOperand);
+    }
+  };
+  
 public:
   Parser(Preprocessor &PP, Action &Actions);
   ~Parser();