commit 9f24c38fe3119d0f620bd8efc3a31fb596e09a65
author Mohammad Samiul Islam <samiul@google.com> Thu Jun 20 19:03:32 2019 +0100
committer Mohammad Samiul Islam <samiul@google.com> Thu Jun 20 19:03:32 2019 +0100
tree 221b42de321593e37f195ac7f4dd3edea254ca0b
parent 3215fd93c7a335a7368020c9d60efb467d8c943a

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

diff --git a/base/include/android-base/expected.h b/base/include/android-base/expected.h
index 08c9fb5..957a8a0 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>