From a84cee8127a0e9724b26e7d1d527f220c358c328 Mon Sep 17 00:00:00 2001
From: Siying Dong <siying.d@fb.com>
Date: Mon, 31 Jul 2017 12:00:02 -0700
Subject: [PATCH] Add a missing "once" in .h

Summary: Closes https://github.com/facebook/rocksdb/pull/2670

Differential Revision: D5529018

Pulled By: siying

fbshipit-source-id: 10a378933d509035d2dbe502247dd85fcea09789
---
 util/cast_util.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/util/cast_util.h b/util/cast_util.h
index b42d5d6c4..2dc8138ab 100644
--- a/util/cast_util.h
+++ b/util/cast_util.h
@@ -3,6 +3,8 @@
 //  COPYING file in the root directory) and Apache 2.0 License
 //  (found in the LICENSE.Apache file in the root directory).
 
+#pragma once
+
 namespace rocksdb {
 // The helper function to assert the move from dynamic_cast<> to
 // static_cast<> is correct. This function is to deal with legacy code.