From 9f24c38fe3119d0f620bd8efc3a31fb596e09a65 Mon Sep 17 00:00:00 2001
From: Mohammad Samiul Islam <samiul@google.com>
Date: Thu, 20 Jun 2019 19:03:32 +0100
Subject: [PATCH] Prevent definitions of expected.h from being included twice

Bug: 135683564
Test: Included expected.h from two different files. Builds succesfully
    with the fix. Does not build without the fix.

Change-Id: If1962a3b70f7580fa652a043aaf29bf592d1926c
---
 base/include/android-base/expected.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/base/include/android-base/expected.h b/base/include/android-base/expected.h
index 08c9fb50d..957a8a000 100644
--- a/base/include/android-base/expected.h
+++ b/base/include/android-base/expected.h
@@ -14,6 +14,8 @@
  * limitations under the License.
  */
 
+#pragma once
+
 #include <algorithm>
 #include <initializer_list>
 #include <type_traits>