From a35e73b91ff6ab54424c6bb16babbd618ea3194f Mon Sep 17 00:00:00 2001
From: Dylan Maloy <dmaloy@meta.com>
Date: Mon, 21 Apr 2025 23:18:46 +0000
Subject: [PATCH] [c10] add #pragma once to leftright (#151710)

Summary: i am getting duplicate defn's when including in my binary that already includes the dispatcher.

Test Plan: CI

Differential Revision: D73237748

Pull Request resolved: https://github.com/pytorch/pytorch/pull/151710
Approved by: https://github.com/georgiaphillips
---
 c10/util/LeftRight.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/c10/util/LeftRight.h b/c10/util/LeftRight.h
index 759f6967933..438f3aac269 100644
--- a/c10/util/LeftRight.h
+++ b/c10/util/LeftRight.h
@@ -1,3 +1,5 @@
+#pragma once
+
 #include <c10/macros/Macros.h>
 #include <c10/util/Synchronized.h>
 #include <array>