1 files changed, 4 insertions, 0 deletions
diff --git a/lib/Lex/PPExpressions.cpp b/lib/Lex/PPExpressions.cpp
index 756ce27a93..9920c4cb7c 100644
--- a/lib/Lex/PPExpressions.cpp
+++ b/lib/Lex/PPExpressions.cpp
@@ -24,6 +24,8 @@
 #include "llvm/ADT/APSInt.h"
 using namespace clang;
 
+namespace {
+
 /// PPValue - Represents the value of a subexpression of a preprocessor
 /// conditional and the source range covered by it.
 class PPValue {
@@ -47,6 +49,8 @@ public:
   void setEnd(SourceLocation L) { Range.setEnd(L); }
 };
 
+}
+
 static bool EvaluateDirectiveSubExpr(PPValue &LHS, unsigned MinPrec,
                                      Token &PeekTok, bool ValueLive,
                                      Preprocessor &PP);