Silence a "not all control paths return a value" warning; NFC

diff --git a/clang/lib/Sema/SemaCodeComplete.cpp b/clang/lib/Sema/SemaCodeComplete.cpp
index d3c154f..f9f20af 100644 (file)
--- a/clang/lib/Sema/SemaCodeComplete.cpp
+++ b/clang/lib/Sema/SemaCodeComplete.cpp
@@ -6150,6 +6150,7 @@ static bool argMatchesTemplateParams(const ParsedTemplateArgument &Arg,
   case ParsedTemplateArgument::Template:
     return llvm::isa<TemplateTemplateParmDecl>(Param); // signature not checked
   }
+  llvm_unreachable("Unhandled switch case");
 }
 
 QualType Sema::ProduceTemplateArgumentSignatureHelp(