Export of internal Abseil changes

--
8e75347c10d85112296811be6ef35761744ad9bc by Derek Mauro <dmauro@google.com>:

Big update to LTS release process
  * Add create_lts.py script to to the LTS modification
    This is simpler than copybara since very few changes are needed
  * Use the default installation paths instead of a versioned path.
    If a versioned path is needed, this is easy to change on the commandline.
  * Make the integration test use the LTS transformed version
  * Test both static and dynamic linking (fixes pkg-config dynamic linking)

PiperOrigin-RevId: 363566934

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e00e971a2de3138861f5e1900201c9cc7788f714 by Laramie Leavitt <lar@google.com>:

Add a non-compile test to absl::BitGenRef for temporaries.

PiperOrigin-RevId: 363437284

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3685644ec115d99789de32aceb76c32a00756fea by Derek Mauro <dmauro@google.com>:

Make OSS code consistent with internal code by using the forward
declaration of absl::Status that contains ABSL_MUST_USE_RESULT.

PiperOrigin-RevId: 363426906

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b85fec142c3aa3f632fa985f9f8f73a253819723 by Evan Brown <ezb@google.com>:

Move raw_hash_set::infoz_ into raw_hash_set::settings_. This reduces the size of raw_hash_sets by alignof(size_t) bytes when hashtablez is disabled.

PiperOrigin-RevId: 363034264

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c6fde3b17e5845191eb8b2bfc1760c8bfb9573ff by Mark Barolak <mbar@google.com>:

Internal change

PiperOrigin-RevId: 362990378

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81713cf964905b43d1cbe32ce5fed97539029625 by Abseil Team <absl-team@google.com>:

Fix typo in comment (execeptions -> exceptions).

PiperOrigin-RevId: 362946191

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3ee92ca470feca44da417b03ee45a915c6eb5155 by Abseil Team <absl-team@google.com>:

Add absl::FindAndReportLeaks and routes it to the corresponding
__lsan_do_recoverable_leak_check.

PiperOrigin-RevId: 362622199

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b95b7194b20e02c20d72289fbc79a0d35b82e256 by Abseil Team <absl-team@google.com>:

Add `kWithEverything` to StatusToStringMode

PiperOrigin-RevId: 362595218

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0a960d96a0014eab7e1c55b479269450ed8e98d7 by Abseil Team <absl-team@google.com>:

Accept e.g. ".__uniq" as a valid clone name.  Further, bring the implementation
on par with libiberty's demangler grammar.

Clang introduced option -funique-internal-linkage-names that adds the suffix
".__uniq.[0-9]+" to internal linkage functions to give them a globally unique
identifier.  The suffix was designed to work with existing demanglers which do
recognize a "_" along with the alphanumeric string. This change enhances the
demangler to allow "_" with the alphanumeric string.

Please refer to libiberty's cp-demangle.c where function d_clone_suffix
implements the demangling of clone suffixes :

1.  '_' is accepted as a valid character with the alphanumeric sequence.
2.  The alphanumberic sequence is optional.
3.  The digit sequence is optional.

PiperOrigin-RevId: 362557420

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2ac5ea212c150afd2f58025a5cab8c45d16949c6 by Abseil Team <absl-team@google.com>:

Change variable name 'slots' to 'slot_count' to avoid name-clash with Qt builds.

PiperOrigin-RevId: 362556289

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934f0f409c9c548716a46363d6e243406fad4028 by Mark Barolak <mbar@google.com>:

Clarify the comment on ABSL_CACHELINE_SIZE to indicate that the macro definition itself shouldn't change, but rather that call sites should change when possible.

This addresses the request for improved documentation in https://github.com/abseil/abseil-cpp/pull/842.

PiperOrigin-RevId: 362354288
GitOrigin-RevId: 8e75347c10d85112296811be6ef35761744ad9bc
Change-Id: I33ec8561d8d645c3353e9d2dd447501d0e1825a7

4 files changed, 24 insertions, 2 deletions

diff --git a/absl/status/internal/status_internal.h b/absl/status/internal/status_internal.h
index 279f8f55..99a2d964 100644
--- a/absl/status/internal/status_internal.h
+++ b/absl/status/internal/status_internal.h
@@ -19,6 +19,17 @@
 #include "absl/container/inlined_vector.h"
 #include "absl/strings/cord.h"
 
+#ifndef SWIG
+// Disabled for SWIG as it doesn't parse attributes correctly.
+namespace absl {
+ABSL_NAMESPACE_BEGIN
+// Returned Status objects may not be ignored. Codesearch doesn't handle ifdefs
+// as part of a class definitions (b/6995610), so we use a forward declaration.
+class ABSL_MUST_USE_RESULT Status;
+ABSL_NAMESPACE_END
+}  // namespace absl
+#endif  // !SWIG
+
 namespace absl {
 ABSL_NAMESPACE_BEGIN
 
diff --git a/absl/status/status.h b/absl/status/status.h
index df9e330c..61486fee 100644
--- a/absl/status/status.h
+++ b/absl/status/status.h
@@ -291,6 +291,8 @@ enum class StatusToStringMode : int {
   kWithNoExtraData = 0,
   // ToString will contain the payloads.
   kWithPayload = 1 << 0,
+  // ToString will include all the extra data this Status has.
+  kWithEverything = ~kWithNoExtraData,
 };
 
 // absl::StatusToStringMode is specified as a bitmask type, which means the
@@ -410,7 +412,12 @@ inline StatusToStringMode& operator^=(StatusToStringMode& lhs,
 //     return result;
 //   }
 //
-class ABSL_MUST_USE_RESULT Status final {
+// For documentation see https://abseil.io/docs/cpp/guides/status.
+//
+// Returned Status objects may not be ignored. status_internal.h has a forward
+// declaration of the form
+// class ABSL_MUST_USE_RESULT Status;
+class Status final {
  public:
   // Constructors
 
diff --git a/absl/status/status_test.cc b/absl/status/status_test.cc
index 7116ba67..0e1a43ce 100644
--- a/absl/status/status_test.cc
+++ b/absl/status/status_test.cc
@@ -292,6 +292,10 @@ TEST(Status, ToStringMode) {
               AllOf(HasSubstr("INTERNAL: fail"), HasSubstr("[foo='bar']"),
                     HasSubstr("[bar='\\xff']")));
 
+  EXPECT_THAT(s.ToString(absl::StatusToStringMode::kWithEverything),
+              AllOf(HasSubstr("INTERNAL: fail"), HasSubstr("[foo='bar']"),
+                    HasSubstr("[bar='\\xff']")));
+
   EXPECT_THAT(s.ToString(~absl::StatusToStringMode::kWithPayload),
               AllOf(HasSubstr("INTERNAL: fail"), Not(HasSubstr("[foo='bar']")),
                     Not(HasSubstr("[bar='\\xff']"))));
diff --git a/absl/status/statusor.h b/absl/status/statusor.h
index 469d486f..b7c55cc8 100644
--- a/absl/status/statusor.h
+++ b/absl/status/statusor.h
@@ -135,7 +135,7 @@ class ABSL_MUST_USE_RESULT StatusOr;
 //
 // NOTE: using `absl::StatusOr<T>::value()` when no valid value is present will
 // throw an exception if exceptions are enabled or terminate the process when
-// execeptions are not enabled.
+// exceptions are not enabled.
 //
 // Example:
 //