Export of internal Abseil changes.

--
c321829735accc2e6beb81e6a5a4421e5647b876 by CJ Johnson <johnsoncj@google.com>:

Updates the definition of InlinedVector::swap(InlinedVector&) to be exception safe and adds exception safety tests

PiperOrigin-RevId: 255511536

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0d86445891748efb09430eb9ede267b54185a246 by CJ Johnson <johnsoncj@google.com>:

Updates the definition of InlinedVector::erase(...) to be exception safe and adds an exception safety test for it.

PiperOrigin-RevId: 255492671

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f07e8fa62dfe9eb0d025b27fca8c6db43c5a328f by CJ Johnson <johnsoncj@google.com>:

Updates the implementation of InlinedVector::emplace_back(...) to be exception safe and adds exception safety tests

PiperOrigin-RevId: 255422837

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4c3be92bfe4c1636a03cef8fd5aa802fed0d2c61 by Abseil Team <absl-team@google.com>:

Internal Change

PiperOrigin-RevId: 255422693

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6df38ea42f00678c357a539016163f8ac4c084e6 by Gennadiy Rozental <rogeeff@google.com>:

Introduce public interfaces for setting and getting program usage messages.

PiperOrigin-RevId: 255291467

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8f21d594aed3971d37db70226847c693eb548edb by Laramie Leavitt <lar@google.com>:

Move absl/random's copy of ABSL_ATTRIBUTE_FORCE_INLINE and
ABSL_ATTRIBUTE_NEVER_INLINE into .cc files and rename to
prevent conflicts.

https://github.com/abseil/abseil-cpp/issues/343

PiperOrigin-RevId: 255288599

--
6b7430ad0c8bd860fb9394894f5eeedd1acc9f77 by CJ Johnson <johnsoncj@google.com>:

Updates the ScopedAllocatorWorks test for InlinedVector to not rely on the byte count allocated by the standard library

In doing so, removes LegacyNextCapacityFrom(...) impl function from InlinedVector

Also applies clang-format to the test file

PiperOrigin-RevId: 255207606
GitOrigin-RevId: c321829735accc2e6beb81e6a5a4421e5647b876
Change-Id: I7438211c36c4549fca2e866658f8d579c65d7d52

3 files changed, 10 insertions, 51 deletions

diff --git a/absl/flags/internal/usage.cc b/absl/flags/internal/usage.cc
index f17cc6c5787d..b1ff8b83c223 100644
--- a/absl/flags/internal/usage.cc
+++ b/absl/flags/internal/usage.cc
@@ -21,6 +21,7 @@
 #include "absl/flags/flag.h"
 #include "absl/flags/internal/path_util.h"
 #include "absl/flags/internal/program_name.h"
+#include "absl/flags/usage.h"
 #include "absl/flags/usage_config.h"
 #include "absl/strings/ascii.h"
 #include "absl/strings/str_cat.h"
@@ -204,7 +205,7 @@ void FlagsHelpImpl(std::ostream& out, flags_internal::FlagKindFilter filter_cb,
                    HelpFormat format = HelpFormat::kHumanReadable) {
   if (format == HelpFormat::kHumanReadable) {
     out << flags_internal::ShortProgramInvocationName() << ": "
-        << flags_internal::ProgramUsageMessage() << "\n\n";
+        << absl::ProgramUsageMessage() << "\n\n";
   } else {
     // XML schema is not a part of our public API for now.
     out << "<?xml version=\"1.0\"?>\n"
@@ -213,7 +214,7 @@ void FlagsHelpImpl(std::ostream& out, flags_internal::FlagKindFilter filter_cb,
         // The program name and usage.
         << XMLElement("program", flags_internal::ShortProgramInvocationName())
         << '\n'
-        << XMLElement("usage", flags_internal::ProgramUsageMessage()) << '\n';
+        << XMLElement("usage", absl::ProgramUsageMessage()) << '\n';
   }
 
   // Map of package name to
@@ -278,39 +279,9 @@ void FlagsHelpImpl(std::ostream& out, flags_internal::FlagKindFilter filter_cb,
   }
 }
 
-ABSL_CONST_INIT absl::Mutex usage_message_guard(absl::kConstInit);
-ABSL_CONST_INIT std::string* program_usage_message
-    GUARDED_BY(usage_message_guard) = nullptr;
-
 }  // namespace
 
 // --------------------------------------------------------------------
-// Sets the "usage" message to be used by help reporting routines.
-
-void SetProgramUsageMessage(absl::string_view new_usage_message) {
-  absl::MutexLock l(&usage_message_guard);
-
-  if (flags_internal::program_usage_message != nullptr) {
-    ABSL_INTERNAL_LOG(FATAL, "SetProgramUsageMessage() called twice.");
-    std::exit(1);
-  }
-
-  program_usage_message = new std::string(new_usage_message);
-}
-
-// --------------------------------------------------------------------
-// Returns the usage message set by SetProgramUsageMessage().
-// Note: We able to return string_view here only because calling
-// SetProgramUsageMessage twice is prohibited.
-absl::string_view ProgramUsageMessage() {
-  absl::MutexLock l(&usage_message_guard);
-
-  return program_usage_message != nullptr
-             ? absl::string_view(*program_usage_message)
-             : "Warning: SetProgramUsageMessage() never called";
-}
-
-// --------------------------------------------------------------------
 // Produces the help message describing specific flag.
 void FlagHelp(std::ostream& out, const flags_internal::CommandLineFlag& flag,
               HelpFormat format) {
diff --git a/absl/flags/internal/usage.h b/absl/flags/internal/usage.h
index 2d0ea7a72a4d..33f3f969bfaf 100644
--- a/absl/flags/internal/usage.h
+++ b/absl/flags/internal/usage.h
@@ -29,20 +29,6 @@
 namespace absl {
 namespace flags_internal {
 
-// Sets the "usage" message to be used by help reporting routines.
-// For example:
-//  absl::SetProgramUsageMessage(
-//      absl::StrCat("This program does nothing.  Sample usage:\n", argv[0],
-//                   " <uselessarg1> <uselessarg2>"));
-// Do not include commandline flags in the usage: we do that for you!
-// Note: Calling SetProgramUsageMessage twice will trigger a call to std::exit.
-void SetProgramUsageMessage(absl::string_view new_usage_message);
-
-// Returns the usage message set by SetProgramUsageMessage().
-absl::string_view ProgramUsageMessage();
-
-// --------------------------------------------------------------------
-
 // The format to report the help messages in.
 enum class HelpFormat {
   kHumanReadable,
diff --git a/absl/flags/internal/usage_test.cc b/absl/flags/internal/usage_test.cc
index cb40aa42378d..fa121fc933fc 100644
--- a/absl/flags/internal/usage_test.cc
+++ b/absl/flags/internal/usage_test.cc
@@ -13,14 +13,16 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
+#include "absl/flags/internal/usage.h"
+
 #include <sstream>
 
 #include "gtest/gtest.h"
 #include "absl/flags/flag.h"
-#include "absl/flags/parse.h"
 #include "absl/flags/internal/path_util.h"
 #include "absl/flags/internal/program_name.h"
-#include "absl/flags/internal/usage.h"
+#include "absl/flags/parse.h"
+#include "absl/flags/usage.h"
 #include "absl/flags/usage_config.h"
 #include "absl/memory/memory.h"
 #include "absl/strings/match.h"
@@ -81,11 +83,11 @@ class UsageReportingTest : public testing::Test {
 using UsageReportingDeathTest = UsageReportingTest;
 
 TEST_F(UsageReportingDeathTest, TestSetProgramUsageMessage) {
-  EXPECT_EQ(flags::ProgramUsageMessage(), "Custom usage message");
+  EXPECT_EQ(absl::ProgramUsageMessage(), "Custom usage message");
 
 #ifndef _WIN32
   // TODO(rogeeff): figure out why this does not work on Windows.
-  EXPECT_DEATH(flags::SetProgramUsageMessage("custom usage message"),
+  EXPECT_DEATH(absl::SetProgramUsageMessage("custom usage message"),
                ".*SetProgramUsageMessage\\(\\) called twice.*");
 #endif
 }
@@ -360,7 +362,7 @@ TEST_F(UsageReportingTest, TestUsageFlag_helpon) {
 int main(int argc, char* argv[]) {
   absl::GetFlag(FLAGS_undefok);  // Force linking of parse.cc
   flags::SetProgramInvocationName("usage_test");
-  flags::SetProgramUsageMessage("Custom usage message");
+  absl::SetProgramUsageMessage("Custom usage message");
   ::testing::InitGoogleTest(&argc, argv);
 
   return RUN_ALL_TESTS();