Abseil LTS 2020092320200923

What's New:
* `absl::StatusOr<T>` has been released. See our [blog
  post](https://abseil.io/blog/2020-091021-status) for more
  information.
* Abseil Flags reflection interfaces have been released.
* Abseil Flags memory usage has been significantly optimized.
* Abseil now supports a "hardened" build mode. This build mode enables
  runtime checks that guard against programming errors that may lead
  to security vulnerabilities.

Notable Fixes:
* Sanitizer dynamic annotations like `AnnotateRWLockCreate` that are
  also defined by the compiler sanitizer implementation are no longer
  also defined by Abseil.
* Sanitizer macros are now prefixed with `ABSL_` to avoid naming collisions.
* Sanitizer usage is now automatically detected and no longer requires
  macros like `ADDRESS_SANITIZER` to be defined on the command line.

Breaking Changes:
* Abseil no longer contains a `dynamic_annotations` library. Users
  using a supported build system (Bazel or CMake) are unaffected by
  this, but users manually specifying link libraries may get an error
  about a missing linker input.

Baseline: 7680a5f8efe32de4753baadbd63e74e59d95bac1
Cherry picks: None

1 files changed, 33 insertions, 1 deletions

diff --git a/absl/strings/internal/str_format/extension_test.cc b/absl/strings/internal/str_format/extension_test.cc
index 4e23fefb..1c93fdb1 100644
--- a/absl/strings/internal/str_format/extension_test.cc
+++ b/absl/strings/internal/str_format/extension_test.cc
@@ -19,9 +19,26 @@
 #include <random>
 #include <string>
 
+#include "gtest/gtest.h"
 #include "absl/strings/str_format.h"
+#include "absl/strings/string_view.h"
 
-#include "gtest/gtest.h"
+namespace my_namespace {
+class UserDefinedType {
+ public:
+  UserDefinedType() = default;
+
+  void Append(absl::string_view str) { value_.append(str.data(), str.size()); }
+  const std::string& Value() const { return value_; }
+
+  friend void AbslFormatFlush(UserDefinedType* x, absl::string_view str) {
+    x->Append(str);
+  }
+
+ private:
+  std::string value_;
+};
+}  // namespace my_namespace
 
 namespace {
 
@@ -63,4 +80,19 @@ TEST(FormatExtensionTest, SinkAppendChars) {
     EXPECT_EQ(actual, expected);
   }
 }
+
+TEST(FormatExtensionTest, VerifyEnumEquality) {
+#define X_VAL(id)                           \
+  EXPECT_EQ(absl::FormatConversionChar::id, \
+            absl::str_format_internal::FormatConversionCharInternal::id);
+  ABSL_INTERNAL_CONVERSION_CHARS_EXPAND_(X_VAL, );
+#undef X_VAL
+
+#define X_VAL(id)                              \
+  EXPECT_EQ(absl::FormatConversionCharSet::id, \
+            absl::str_format_internal::FormatConversionCharSetInternal::id);
+  ABSL_INTERNAL_CONVERSION_CHARS_EXPAND_(X_VAL, );
+#undef X_VAL
+}
+
 }  // namespace