[clang-format] assert(false) -> llvm_unreachable

Avoids warnings in -asserts builds.

FormatTokenSource.h:240:3: error: non-void function does not return a value [-Werror,-Wreturn-type]
  }
  ^

diff --git a/clang/lib/Format/FormatTokenSource.h b/clang/lib/Format/FormatTokenSource.h
index 8bf7e69..0be4628 100644 (file)
--- a/clang/lib/Format/FormatTokenSource.h
+++ b/clang/lib/Format/FormatTokenSource.h
@@ -236,7 +236,7 @@ public:
   }
 
   FormatToken *insertTokens(ArrayRef<FormatToken *> Tokens) override {
-    assert(false && "Cannot insert tokens while parsing a macro.");
+    llvm_unreachable("Cannot insert tokens while parsing a macro.");
   }
 
 private: