Fix -Wswitch warning; NFC

diff --git a/clang/lib/Lex/PPDirectives.cpp b/clang/lib/Lex/PPDirectives.cpp
index 1ccf24c..8fe7066 100644 (file)
--- a/clang/lib/Lex/PPDirectives.cpp
+++ b/clang/lib/Lex/PPDirectives.cpp
@@ -3259,6 +3259,9 @@ void Preprocessor::HandleElifFamilyDirective(Token &ElifToken,
     case tok::pp_elifndef:
       Callbacks->Elifndef(ElifToken.getLocation(), ConditionRange, CI.IfLoc);
       break;
+    default:
+      assert(false && "unexpected directive kind");
+      break;
     }
   }