From 79dc0f231a5fc191c90910615572c737c9d688ee Mon Sep 17 00:00:00 2001
From: dmauro <dmauro@google.com>
Date: Wed, 14 Oct 2020 10:37:22 -0400
Subject: [PATCH] Googletest export

Disable -Wmismatched-tags warning for struct/class tuple_size

PiperOrigin-RevId: 337087493
---
 .../include/gtest/internal/gtest-internal.h      | 16 ++++++++++++----
 1 file changed, 12 insertions(+), 4 deletions(-)

diff --git a/googletest/include/gtest/internal/gtest-internal.h b/googletest/include/gtest/internal/gtest-internal.h
index 738e6c3a..959f6fcf 100644
--- a/googletest/include/gtest/internal/gtest-internal.h
+++ b/googletest/include/gtest/internal/gtest-internal.h
@@ -1323,11 +1323,19 @@ constexpr bool InstantiateTypedTestCase_P_IsDeprecated() { return true; }
 }  // namespace testing
 
 namespace std {
-
+// Some standard library implementations use `struct tuple_size` and some use
+// `class tuple_size`. Clang warns about the mismatch.
+// https://reviews.llvm.org/D55466
+#ifdef __clang__
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wmismatched-tags"
+#endif
 template <typename... Ts>
-class tuple_size<testing::internal::FlatTuple<Ts...>>
-    : public std::integral_constant<size_t, sizeof...(Ts)> {};
-
+struct tuple_size<testing::internal::FlatTuple<Ts...>>
+    : std::integral_constant<size_t, sizeof...(Ts)> {};
+#ifdef __clang__
+#pragma clang diagnostic pop
+#endif
 }  // namespace std
 
 #define GTEST_MESSAGE_AT_(file, line, message, result_type) \