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-rw-r--r--absl/container/internal/btree.h1
-rw-r--r--absl/meta/BUILD.bazel16
-rw-r--r--absl/random/BUILD.bazel16
-rw-r--r--absl/random/exponential_distribution_test.cc2
-rw-r--r--absl/random/gaussian_distribution_test.cc2
-rw-r--r--absl/random/internal/BUILD.bazel16
-rw-r--r--absl/random/log_uniform_int_distribution_test.cc2
-rw-r--r--absl/random/poisson_distribution_test.cc4
-rw-r--r--absl/strings/string_view_test.cc8
-rw-r--r--absl/types/any.h12
-rw-r--r--absl/types/compare.h150
-rw-r--r--absl/types/compare_test.cc26
-rw-r--r--absl/utility/BUILD.bazel16
13 files changed, 208 insertions, 63 deletions
diff --git a/absl/container/internal/btree.h b/absl/container/internal/btree.h
index 9561a4d62fe4..b255984174e6 100644
--- a/absl/container/internal/btree.h
+++ b/absl/container/internal/btree.h
@@ -2082,6 +2082,7 @@ auto btree<P>::rebalance_after_delete(iterator iter) -> iterator {
     if (!merged) {
       break;
     }
+    iter.position = iter.node->position();
     iter.node = iter.node->parent();
   }
 
diff --git a/absl/meta/BUILD.bazel b/absl/meta/BUILD.bazel
index 8db8dd6b1581..c06d2d9708c1 100644
--- a/absl/meta/BUILD.bazel
+++ b/absl/meta/BUILD.bazel
@@ -1,3 +1,19 @@
+#
+# Copyright 2019 The Abseil Authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
 load("@rules_cc//cc:defs.bzl", "cc_library", "cc_test")
 load(
     "//absl:copts/configure_copts.bzl",
diff --git a/absl/random/BUILD.bazel b/absl/random/BUILD.bazel
index 4e210e71d6c8..be6414742f7c 100644
--- a/absl/random/BUILD.bazel
+++ b/absl/random/BUILD.bazel
@@ -1,3 +1,19 @@
+#
+# Copyright 2019 The Abseil Authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
 # ABSL random-number generation libraries.
 
 load("@rules_cc//cc:defs.bzl", "cc_binary", "cc_library", "cc_test")
diff --git a/absl/random/exponential_distribution_test.cc b/absl/random/exponential_distribution_test.cc
index 6f8865c2599f..dc49044d3b76 100644
--- a/absl/random/exponential_distribution_test.cc
+++ b/absl/random/exponential_distribution_test.cc
@@ -346,7 +346,7 @@ std::string ParamName(const ::testing::TestParamInfo<Param>& info) {
   return absl::StrReplaceAll(name, {{"+", "_"}, {"-", "_"}, {".", "_"}});
 }
 
-INSTANTIATE_TEST_CASE_P(, ExponentialDistributionTests,
+INSTANTIATE_TEST_CASE_P(All, ExponentialDistributionTests,
                         ::testing::ValuesIn(GenParams()), ParamName);
 
 // NOTE: absl::exponential_distribution is not guaranteed to be stable.
diff --git a/absl/random/gaussian_distribution_test.cc b/absl/random/gaussian_distribution_test.cc
index 47c2989d340b..49c07513bf22 100644
--- a/absl/random/gaussian_distribution_test.cc
+++ b/absl/random/gaussian_distribution_test.cc
@@ -394,7 +394,7 @@ std::string ParamName(const ::testing::TestParamInfo<Param>& info) {
   return absl::StrReplaceAll(name, {{"+", "_"}, {"-", "_"}, {".", "_"}});
 }
 
-INSTANTIATE_TEST_SUITE_P(, GaussianDistributionTests,
+INSTANTIATE_TEST_SUITE_P(All, GaussianDistributionTests,
                          ::testing::ValuesIn(GenParams()), ParamName);
 
 // NOTE: absl::gaussian_distribution is not guaranteed to be stable.
diff --git a/absl/random/internal/BUILD.bazel b/absl/random/internal/BUILD.bazel
index 5e7c16f322a2..21fa43ca8c9e 100644
--- a/absl/random/internal/BUILD.bazel
+++ b/absl/random/internal/BUILD.bazel
@@ -1,3 +1,19 @@
+#
+# Copyright 2019 The Abseil Authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
 load("@rules_cc//cc:defs.bzl", "cc_binary", "cc_library", "cc_test")
 
 # Internal-only implementation classes for Abseil Random
diff --git a/absl/random/log_uniform_int_distribution_test.cc b/absl/random/log_uniform_int_distribution_test.cc
index 0ff4c32d95d6..5270531d2035 100644
--- a/absl/random/log_uniform_int_distribution_test.cc
+++ b/absl/random/log_uniform_int_distribution_test.cc
@@ -243,7 +243,7 @@ std::string ParamName(
   return absl::StrReplaceAll(name, {{"+", "_"}, {"-", "_"}, {".", "_"}});
 }
 
-INSTANTIATE_TEST_SUITE_P(, LogUniformIntChiSquaredTest,
+INSTANTIATE_TEST_SUITE_P(All, LogUniformIntChiSquaredTest,
                          ::testing::ValuesIn(GenParams()), ParamName);
 
 // NOTE: absl::log_uniform_int_distribution is not guaranteed to be stable.
diff --git a/absl/random/poisson_distribution_test.cc b/absl/random/poisson_distribution_test.cc
index 6d68999a3c54..9d215fbc70f1 100644
--- a/absl/random/poisson_distribution_test.cc
+++ b/absl/random/poisson_distribution_test.cc
@@ -339,7 +339,7 @@ std::string ZParamName(const ::testing::TestParamInfo<ZParam>& info) {
   return absl::StrReplaceAll(name, {{"+", "_"}, {"-", "_"}, {".", "_"}});
 }
 
-INSTANTIATE_TEST_SUITE_P(, PoissonDistributionZTest,
+INSTANTIATE_TEST_SUITE_P(All, PoissonDistributionZTest,
                          ::testing::ValuesIn(GetZParams()), ZParamName);
 
 // The PoissonDistributionChiSquaredTest class provides a basic test framework
@@ -468,7 +468,7 @@ TEST_P(PoissonDistributionChiSquaredTest, AbslPoissonDistribution) {
   EXPECT_LE(failures, 4);
 }
 
-INSTANTIATE_TEST_SUITE_P(, PoissonDistributionChiSquaredTest,
+INSTANTIATE_TEST_SUITE_P(All, PoissonDistributionChiSquaredTest,
                          ::testing::Values(0.5, 1.0, 2.0, 10.0, 50.0, 51.0,
                                            200.0));
 
diff --git a/absl/strings/string_view_test.cc b/absl/strings/string_view_test.cc
index b4ed8a74603c..4f531226dfe2 100644
--- a/absl/strings/string_view_test.cc
+++ b/absl/strings/string_view_test.cc
@@ -822,15 +822,17 @@ TEST(StringViewTest, FrontBackSingleChar) {
 // "read of dereferenced null pointer is not allowed in a constant expression".
 // At run time, the behavior of `std::char_traits::length()` on `nullptr` is
 // undefined by the standard and usually results in crash with libc++.
+// GCC also started rejected this in libstdc++ starting in GCC9.
 // In MSVC, creating a constexpr string_view from nullptr also triggers an
 // "unevaluable pointer value" error. This compiler implementation conforms
 // to the standard, but `absl::string_view` implements a different
 // behavior for historical reasons. We work around tests that construct
 // `string_view` from `nullptr` when using libc++.
-#if !defined(ABSL_HAVE_STD_STRING_VIEW) || \
-    (!defined(_LIBCPP_VERSION) && !defined(_MSC_VER))
+#if !defined(ABSL_HAVE_STD_STRING_VIEW) ||                    \
+    (!(defined(_GLIBCXX_RELEASE) && _GLIBCXX_RELEASE >= 9) && \
+     !defined(_LIBCPP_VERSION) && !defined(_MSC_VER))
 #define ABSL_HAVE_STRING_VIEW_FROM_NULLPTR 1
-#endif  // !defined(ABSL_HAVE_STD_STRING_VIEW) || !defined(_LIBCPP_VERSION)
+#endif
 
 TEST(StringViewTest, NULLInput) {
   absl::string_view s;
diff --git a/absl/types/any.h b/absl/types/any.h
index f3a32812662f..d2e2533f05bc 100644
--- a/absl/types/any.h
+++ b/absl/types/any.h
@@ -515,18 +515,22 @@ ValueType any_cast(any&& operand) {
 // Description at the declaration site (top of file).
 template <typename T>
 const T* any_cast(const any* operand) noexcept {
-  return operand && operand->GetObjTypeId() == any::IdForType<T>()
+  using U =
+      typename std::remove_cv<typename std::remove_reference<T>::type>::type;
+  return operand && operand->GetObjTypeId() == any::IdForType<U>()
              ? std::addressof(
-                   static_cast<const any::Obj<T>*>(operand->obj_.get())->value)
+                   static_cast<const any::Obj<U>*>(operand->obj_.get())->value)
              : nullptr;
 }
 
 // Description at the declaration site (top of file).
 template <typename T>
 T* any_cast(any* operand) noexcept {
-  return operand && operand->GetObjTypeId() == any::IdForType<T>()
+  using U =
+      typename std::remove_cv<typename std::remove_reference<T>::type>::type;
+  return operand && operand->GetObjTypeId() == any::IdForType<U>()
              ? std::addressof(
-                   static_cast<any::Obj<T>*>(operand->obj_.get())->value)
+                   static_cast<any::Obj<U>*>(operand->obj_.get())->value)
              : nullptr;
 }
 
diff --git a/absl/types/compare.h b/absl/types/compare.h
index 50361d623025..a213e0b0b682 100644
--- a/absl/types/compare.h
+++ b/absl/types/compare.h
@@ -79,79 +79,72 @@ enum class ord : value_type { less = -1, greater = 1 };
 
 enum class ncmp : value_type { unordered = -127 };
 
+// Define macros to allow for creation or emulation of C++17 inline variables
+// based on whether the feature is supported. Note: we can't use
+// ABSL_INTERNAL_INLINE_CONSTEXPR here because the variables here are of
+// incomplete types so they need to be defined after the types are complete.
+#ifdef __cpp_inline_variables
+
+#define ABSL_COMPARE_INLINE_BASECLASS_DECL(name)
+
+#define ABSL_COMPARE_INLINE_SUBCLASS_DECL(type, name) \
+  static const type name
+
+#define ABSL_COMPARE_INLINE_INIT(type, name, init) \
+  inline constexpr type type::name(init)
+
+#else  // __cpp_inline_variables
+
+#define ABSL_COMPARE_INLINE_BASECLASS_DECL(name) \
+  ABSL_CONST_INIT static const T name
+
+#define ABSL_COMPARE_INLINE_SUBCLASS_DECL(type, name)
+
+#define ABSL_COMPARE_INLINE_INIT(type, name, init) \
+  template <typename T>                            \
+  const T compare_internal::type##_base<T>::name(init)
+
+#endif  // __cpp_inline_variables
+
 // These template base classes allow for defining the values of the constants
 // in the header file (for performance) without using inline variables (which
 // aren't available in C++11).
 template <typename T>
 struct weak_equality_base {
-  ABSL_CONST_INIT static const T equivalent;
-  ABSL_CONST_INIT static const T nonequivalent;
+  ABSL_COMPARE_INLINE_BASECLASS_DECL(equivalent);
+  ABSL_COMPARE_INLINE_BASECLASS_DECL(nonequivalent);
 };
-template <typename T>
-const T weak_equality_base<T>::equivalent(eq::equivalent);
-template <typename T>
-const T weak_equality_base<T>::nonequivalent(eq::nonequivalent);
 
 template <typename T>
 struct strong_equality_base {
-  ABSL_CONST_INIT static const T equal;
-  ABSL_CONST_INIT static const T nonequal;
-  ABSL_CONST_INIT static const T equivalent;
-  ABSL_CONST_INIT static const T nonequivalent;
+  ABSL_COMPARE_INLINE_BASECLASS_DECL(equal);
+  ABSL_COMPARE_INLINE_BASECLASS_DECL(nonequal);
+  ABSL_COMPARE_INLINE_BASECLASS_DECL(equivalent);
+  ABSL_COMPARE_INLINE_BASECLASS_DECL(nonequivalent);
 };
-template <typename T>
-const T strong_equality_base<T>::equal(eq::equal);
-template <typename T>
-const T strong_equality_base<T>::nonequal(eq::nonequal);
-template <typename T>
-const T strong_equality_base<T>::equivalent(eq::equivalent);
-template <typename T>
-const T strong_equality_base<T>::nonequivalent(eq::nonequivalent);
 
 template <typename T>
 struct partial_ordering_base {
-  ABSL_CONST_INIT static const T less;
-  ABSL_CONST_INIT static const T equivalent;
-  ABSL_CONST_INIT static const T greater;
-  ABSL_CONST_INIT static const T unordered;
+  ABSL_COMPARE_INLINE_BASECLASS_DECL(less);
+  ABSL_COMPARE_INLINE_BASECLASS_DECL(equivalent);
+  ABSL_COMPARE_INLINE_BASECLASS_DECL(greater);
+  ABSL_COMPARE_INLINE_BASECLASS_DECL(unordered);
 };
-template <typename T>
-const T partial_ordering_base<T>::less(ord::less);
-template <typename T>
-const T partial_ordering_base<T>::equivalent(eq::equivalent);
-template <typename T>
-const T partial_ordering_base<T>::greater(ord::greater);
-template <typename T>
-const T partial_ordering_base<T>::unordered(ncmp::unordered);
 
 template <typename T>
 struct weak_ordering_base {
-  ABSL_CONST_INIT static const T less;
-  ABSL_CONST_INIT static const T equivalent;
-  ABSL_CONST_INIT static const T greater;
+  ABSL_COMPARE_INLINE_BASECLASS_DECL(less);
+  ABSL_COMPARE_INLINE_BASECLASS_DECL(equivalent);
+  ABSL_COMPARE_INLINE_BASECLASS_DECL(greater);
 };
-template <typename T>
-const T weak_ordering_base<T>::less(ord::less);
-template <typename T>
-const T weak_ordering_base<T>::equivalent(eq::equivalent);
-template <typename T>
-const T weak_ordering_base<T>::greater(ord::greater);
 
 template <typename T>
 struct strong_ordering_base {
-  ABSL_CONST_INIT static const T less;
-  ABSL_CONST_INIT static const T equal;
-  ABSL_CONST_INIT static const T equivalent;
-  ABSL_CONST_INIT static const T greater;
+  ABSL_COMPARE_INLINE_BASECLASS_DECL(less);
+  ABSL_COMPARE_INLINE_BASECLASS_DECL(equal);
+  ABSL_COMPARE_INLINE_BASECLASS_DECL(equivalent);
+  ABSL_COMPARE_INLINE_BASECLASS_DECL(greater);
 };
-template <typename T>
-const T strong_ordering_base<T>::less(ord::less);
-template <typename T>
-const T strong_ordering_base<T>::equal(eq::equal);
-template <typename T>
-const T strong_ordering_base<T>::equivalent(eq::equivalent);
-template <typename T>
-const T strong_ordering_base<T>::greater(ord::greater);
 
 }  // namespace compare_internal
 
@@ -162,6 +155,9 @@ class weak_equality
   friend struct compare_internal::weak_equality_base<weak_equality>;
 
  public:
+  ABSL_COMPARE_INLINE_SUBCLASS_DECL(weak_equality, equivalent);
+  ABSL_COMPARE_INLINE_SUBCLASS_DECL(weak_equality, nonequivalent);
+
   // Comparisons
   friend constexpr bool operator==(
       weak_equality v, compare_internal::OnlyLiteralZero<>) noexcept {
@@ -183,6 +179,10 @@ class weak_equality
  private:
   compare_internal::value_type value_;
 };
+ABSL_COMPARE_INLINE_INIT(weak_equality, equivalent,
+                         compare_internal::eq::equivalent);
+ABSL_COMPARE_INLINE_INIT(weak_equality, nonequivalent,
+                         compare_internal::eq::nonequivalent);
 
 class strong_equality
     : public compare_internal::strong_equality_base<strong_equality> {
@@ -191,6 +191,11 @@ class strong_equality
   friend struct compare_internal::strong_equality_base<strong_equality>;
 
  public:
+  ABSL_COMPARE_INLINE_SUBCLASS_DECL(strong_equality, equal);
+  ABSL_COMPARE_INLINE_SUBCLASS_DECL(strong_equality, nonequal);
+  ABSL_COMPARE_INLINE_SUBCLASS_DECL(strong_equality, equivalent);
+  ABSL_COMPARE_INLINE_SUBCLASS_DECL(strong_equality, nonequivalent);
+
   // Conversion
   constexpr operator weak_equality() const noexcept {  // NOLINT
     return value_ == 0 ? weak_equality::equivalent
@@ -217,6 +222,13 @@ class strong_equality
  private:
   compare_internal::value_type value_;
 };
+ABSL_COMPARE_INLINE_INIT(strong_equality, equal, compare_internal::eq::equal);
+ABSL_COMPARE_INLINE_INIT(strong_equality, nonequal,
+                         compare_internal::eq::nonequal);
+ABSL_COMPARE_INLINE_INIT(strong_equality, equivalent,
+                         compare_internal::eq::equivalent);
+ABSL_COMPARE_INLINE_INIT(strong_equality, nonequivalent,
+                         compare_internal::eq::nonequivalent);
 
 class partial_ordering
     : public compare_internal::partial_ordering_base<partial_ordering> {
@@ -234,6 +246,11 @@ class partial_ordering
   }
 
  public:
+  ABSL_COMPARE_INLINE_SUBCLASS_DECL(partial_ordering, less);
+  ABSL_COMPARE_INLINE_SUBCLASS_DECL(partial_ordering, equivalent);
+  ABSL_COMPARE_INLINE_SUBCLASS_DECL(partial_ordering, greater);
+  ABSL_COMPARE_INLINE_SUBCLASS_DECL(partial_ordering, unordered);
+
   // Conversion
   constexpr operator weak_equality() const noexcept {  // NOLINT
     return value_ == 0 ? weak_equality::equivalent
@@ -292,6 +309,13 @@ class partial_ordering
  private:
   compare_internal::value_type value_;
 };
+ABSL_COMPARE_INLINE_INIT(partial_ordering, less, compare_internal::ord::less);
+ABSL_COMPARE_INLINE_INIT(partial_ordering, equivalent,
+                         compare_internal::eq::equivalent);
+ABSL_COMPARE_INLINE_INIT(partial_ordering, greater,
+                         compare_internal::ord::greater);
+ABSL_COMPARE_INLINE_INIT(partial_ordering, unordered,
+                         compare_internal::ncmp::unordered);
 
 class weak_ordering
     : public compare_internal::weak_ordering_base<weak_ordering> {
@@ -302,6 +326,10 @@ class weak_ordering
   friend struct compare_internal::weak_ordering_base<weak_ordering>;
 
  public:
+  ABSL_COMPARE_INLINE_SUBCLASS_DECL(weak_ordering, less);
+  ABSL_COMPARE_INLINE_SUBCLASS_DECL(weak_ordering, equivalent);
+  ABSL_COMPARE_INLINE_SUBCLASS_DECL(weak_ordering, greater);
+
   // Conversions
   constexpr operator weak_equality() const noexcept {  // NOLINT
     return value_ == 0 ? weak_equality::equivalent
@@ -365,6 +393,11 @@ class weak_ordering
  private:
   compare_internal::value_type value_;
 };
+ABSL_COMPARE_INLINE_INIT(weak_ordering, less, compare_internal::ord::less);
+ABSL_COMPARE_INLINE_INIT(weak_ordering, equivalent,
+                         compare_internal::eq::equivalent);
+ABSL_COMPARE_INLINE_INIT(weak_ordering, greater,
+                         compare_internal::ord::greater);
 
 class strong_ordering
     : public compare_internal::strong_ordering_base<strong_ordering> {
@@ -375,6 +408,11 @@ class strong_ordering
   friend struct compare_internal::strong_ordering_base<strong_ordering>;
 
  public:
+  ABSL_COMPARE_INLINE_SUBCLASS_DECL(strong_ordering, less);
+  ABSL_COMPARE_INLINE_SUBCLASS_DECL(strong_ordering, equal);
+  ABSL_COMPARE_INLINE_SUBCLASS_DECL(strong_ordering, equivalent);
+  ABSL_COMPARE_INLINE_SUBCLASS_DECL(strong_ordering, greater);
+
   // Conversions
   constexpr operator weak_equality() const noexcept {  // NOLINT
     return value_ == 0 ? weak_equality::equivalent
@@ -446,6 +484,16 @@ class strong_ordering
  private:
   compare_internal::value_type value_;
 };
+ABSL_COMPARE_INLINE_INIT(strong_ordering, less, compare_internal::ord::less);
+ABSL_COMPARE_INLINE_INIT(strong_ordering, equal, compare_internal::eq::equal);
+ABSL_COMPARE_INLINE_INIT(strong_ordering, equivalent,
+                         compare_internal::eq::equivalent);
+ABSL_COMPARE_INLINE_INIT(strong_ordering, greater,
+                         compare_internal::ord::greater);
+
+#undef ABSL_COMPARE_INLINE_BASECLASS_DECL
+#undef ABSL_COMPARE_INLINE_SUBCLASS_DECL
+#undef ABSL_COMPARE_INLINE_INIT
 
 namespace compare_internal {
 // We also provide these comparator adapter functions for internal absl use.
diff --git a/absl/types/compare_test.cc b/absl/types/compare_test.cc
index 3a8554219274..ee396fc54d7c 100644
--- a/absl/types/compare_test.cc
+++ b/absl/types/compare_test.cc
@@ -307,5 +307,31 @@ TEST(DoThreeWayComparison, SanityTest) {
       absl::compare_internal::do_three_way_comparison(weak, 10, 5) > 0));
 }
 
+#ifdef __cpp_inline_variables
+TEST(Compare, StaticAsserts) {
+  static_assert(weak_equality::equivalent == 0, "");
+  static_assert(weak_equality::nonequivalent != 0, "");
+
+  static_assert(strong_equality::equal == 0, "");
+  static_assert(strong_equality::nonequal != 0, "");
+  static_assert(strong_equality::equivalent == 0, "");
+  static_assert(strong_equality::nonequivalent != 0, "");
+
+  static_assert(partial_ordering::less < 0, "");
+  static_assert(partial_ordering::equivalent == 0, "");
+  static_assert(partial_ordering::greater > 0, "");
+  static_assert(partial_ordering::unordered != 0, "");
+
+  static_assert(weak_ordering::less < 0, "");
+  static_assert(weak_ordering::equivalent == 0, "");
+  static_assert(weak_ordering::greater > 0, "");
+
+  static_assert(strong_ordering::less < 0, "");
+  static_assert(strong_ordering::equal == 0, "");
+  static_assert(strong_ordering::equivalent == 0, "");
+  static_assert(strong_ordering::greater > 0, "");
+}
+#endif  // __cpp_inline_variables
+
 }  // namespace
 }  // namespace absl
diff --git a/absl/utility/BUILD.bazel b/absl/utility/BUILD.bazel
index 280a7dd56241..61de30be0f68 100644
--- a/absl/utility/BUILD.bazel
+++ b/absl/utility/BUILD.bazel
@@ -1,3 +1,19 @@
+#
+# Copyright 2019 The Abseil Authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
 load("@rules_cc//cc:defs.bzl", "cc_library", "cc_test")
 load(
     "//absl:copts/configure_copts.bzl",