Export of internal Abseil changes

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3e6352709da9a529e608eabff862a12bfaecb587 by Gennadiy Rozental <rogeeff@google.com>:

Replace local copy of FastTypeId with one shared in absl/base/internal.

PiperOrigin-RevId: 304181357

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c89ea428f732226f4dceb508cd6ba3955a1e49e1 by Andy Getzendanner <durandal@google.com>:

Typo fix: add a missing colon.

PiperOrigin-RevId: 304064210

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de2ee7a96bdc7193ffcceb6a2fd6bf464955cbe7 by Samuel Benzaquen <sbenza@google.com>:

Reduce the overhead of the registration token by using an empty struct instead
of bool.

PiperOrigin-RevId: 304054311

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222f05d24fb1df7e815946543a7dc78847c83f92 by Derek Mauro <dmauro@google.com>:

Turn off hashtablez in opensource builds.

Hashtablez is an unsupported, internal-only feature for collecting
information about hashtable usage and performance. By turning it off
in builds where it is unsupported, we get just a little more performance.

PiperOrigin-RevId: 304035460
GitOrigin-RevId: 3e6352709da9a529e608eabff862a12bfaecb587
Change-Id: I0bfe9b5df808a7e35c154b39e6c80e68b0da2b70

1 files changed, 12 insertions, 0 deletions

diff --git a/absl/container/flat_hash_set_test.cc b/absl/container/flat_hash_set_test.cc
index 40d7f85c5db0..8f6f9944ca4e 100644
--- a/absl/container/flat_hash_set_test.cc
+++ b/absl/container/flat_hash_set_test.cc
@@ -16,6 +16,7 @@
 
 #include <vector>
 
+#include "absl/base/internal/raw_logging.h"
 #include "absl/container/internal/hash_generator_testing.h"
 #include "absl/container/internal/unordered_set_constructor_test.h"
 #include "absl/container/internal/unordered_set_lookup_test.h"
@@ -36,6 +37,17 @@ using ::testing::Pointee;
 using ::testing::UnorderedElementsAre;
 using ::testing::UnorderedElementsAreArray;
 
+// Check that absl::flat_hash_set works in a global constructor.
+struct BeforeMain {
+  BeforeMain() {
+    absl::flat_hash_set<int> x;
+    x.insert(1);
+    ABSL_RAW_CHECK(!x.contains(0), "x should not contain 0");
+    ABSL_RAW_CHECK(x.contains(1), "x should contain 1");
+  }
+};
+const BeforeMain before_main;
+
 template <class T>
 using Set =
     absl::flat_hash_set<T, StatefulTestingHash, StatefulTestingEqual, Alloc<T>>;