--
14d42e9d0b8aed0c0f00900cd6fd790908930de5 by Gennadiy Rozental <rogeeff@google.com>:

Fix gcc ci build command for LTS

PiperOrigin-RevId: 331543198

--
f1655ec91a4ad656dd1100cf2e134d08941278ca by Abseil Team <absl-team@google.com>:

Consistently document size_type return value of all map/set types.

PiperOrigin-RevId: 331528359
GitOrigin-RevId: 14d42e9d0b8aed0c0f00900cd6fd790908930de5
Change-Id: I33ebba4acb3e5918e4e112f03c81aba529dcd0b4

--
0e6d5abe305df4e943e0bc0256c67afc00956691 by Abseil Team <absl-team@google.com>:

Ensure that Hashtablez does not pull in absl::Mutex dependency when turned off at compile time.

PiperOrigin-RevId: 331142625
GitOrigin-RevId: 0e6d5abe305df4e943e0bc0256c67afc00956691
Change-Id: I984d6d3436e4825a7b20758c45b3142c0f3bb45a

--
cfb567ed02096320663d882d2c0c2fb7db7af1e4 by Derek Mauro <dmauro@google.com>:

Upgrade to GCC 10.2.0, Bazel 3.5.0, and CMake 3.18.2

PiperOrigin-RevId: 330847323

--
5dcb9ce14d92315163079366a91c43cbd5184ea4 by Evan Brown <ezb@google.com>:

Optimize equal_range() by avoiding the call to upper_bound() when possible.

We need to support heterogeneous comparators that have different behavior when comparing key_type to non-key_type. See the new test.

Also update the comment for `key_compare_to_adapter`.

PiperOrigin-RevId: 330794444

--
744405dbda5513527d74094a5c3b9db1e0927693 by Gennadiy Rozental <rogeeff@google.com>:

Introduce trampoline for friend access to avoid friending routines and classes from different namespace.

PiperOrigin-RevId: 330773156

--
a195d1226576f8a7bb5671f3e42d1021b827fad9 by Abseil Team <absl-team@google.com>:

Fix an incorrect version number test for std::variant availability in tvOs.

PiperOrigin-RevId: 330759480

--
58b02eb9159a577953676d9928cb26b30068b847 by Derek Mauro <dmauro@google.com>:

Use c++20 instead of c++2a now that it is supported by GCC

PiperOrigin-RevId: 330559797
GitOrigin-RevId: cfb567ed02096320663d882d2c0c2fb7db7af1e4
Change-Id: I0e0d68409c95da42f5609920155ba5694ade8df0

--
306a7201c5d9fd2fa5bd4f50ea46a61e1f69925b by Abseil Team <absl-team@google.com>:

Minor documentation cleanup.

PiperOrigin-RevId: 330546393

--
f62a256057797d0a85715ed944760fa62e1ce7a1 by Abseil Team <absl-team@google.com>:

Fix typo in comment abls:: -> absl::

PiperOrigin-RevId: 330286163
GitOrigin-RevId: 306a7201c5d9fd2fa5bd4f50ea46a61e1f69925b
Change-Id: I9ac174396d1b0fcf9b3e0b8a2b00e088b3eb69cd

--
8ae3cb636b81b6498ef30fbe59cc102a4098cad2 by Tom Manshreck <shreck@google.com>:

Upgrade absl::StatusOr<T> docs to Abseil standards

PiperOrigin-RevId: 329975341

--
7c7baf586c7380497a751f1a186a4ef0e650161a by Tom Manshreck <shreck@google.com>:

Update absl::Status to Abseil documentation standards

PiperOrigin-RevId: 329942967

--
6710d022ba987dbae7a5d83045a6697afeb972c4 by Derek Mauro <dmauro@google.com>:

Internal change

PiperOrigin-RevId: 329775111

--
fd182dc699e18522ef16d269731c57669c5487d2 by Abseil Team <absl-team@google.com>:

Google-internal change.

PiperOrigin-RevId: 329737362

--
c0df5e27ffb48d9c784e7019267580fcb4a3f92e by Xiaoyi Zhang <zhangxy@google.com>:

Remove obsolete `static_assert`.

PiperOrigin-RevId: 329727604
GitOrigin-RevId: 8ae3cb636b81b6498ef30fbe59cc102a4098cad2
Change-Id: Ic9dede0ab97f799e7f4093fae75ae0ec6cc21437

--
ea5599482a5120800f060c6d41334dbdbabc3941 by Mark Barolak <mbar@google.com>:

Import of CCTZ from GitHub.

PiperOrigin-RevId: 329715235

--
e897a582bed3aff509b98e5da0711b2afd15ed17 by Tom Manshreck <shreck@google.com>:

* Update Status with overview
* Move public API helper functions out of "Implementation Details"
* Add documentation to Status Codes

PiperOrigin-RevId: 329595541

--
f93b28596f24fa005606565e0a8a4dabe260b01c by Abseil Team <absl-team@google.com>:

Fix -Wextra-semi issues.

ABSL_COMPARE_INLINE_xxx_DECL may expand to nothing.
That produces structs that have only semicolon inside class declaration.
such struct is not a valid c++ code and fails to compile when -Wextra-semi is turned on.

PiperOrigin-RevId: 329564534
GitOrigin-RevId: ea5599482a5120800f060c6d41334dbdbabc3941
Change-Id: Icc9944c3ec8303abc26a167c2ba7c91e59a4877f

--
23500704dd7c2642fad49f88c07ce41ebaab12e4 by Abseil Team <absl-team@google.com>:

Change fetch_add() to store(1 + load())

As there is only one concurrent writer to the Info struct, we can avoid using
the more expensive fetch_add() function.

PiperOrigin-RevId: 329523785

--
79e5018dba2e117ad89b76367165a604b3f24045 by Abseil Team <absl-team@google.com>:

Record rehash count in hashtablez

This will help identify which containers could benefit from a reserve call.

PiperOrigin-RevId: 329510552

--
e327e54b805d67556f934fa7f7dc2d4e72fa066a by Abseil Team <absl-team@google.com>:

Fix -Wsign-compare issues.

These lines could theoretically have overflowed in cases of very large stack
traces etc. Very unlikely, but this was causing warnings when built with
-Wsign-compare, which we intend to enable with Chromium.

In none of these three cases is it trivial to switch to a range-based for loop.

PiperOrigin-RevId: 329415195

--
08aca2fc75e8b3ad1201849987b64148fe48f283 by Xiaoyi Zhang <zhangxy@google.com>:

Release absl::StatusOr.

PiperOrigin-RevId: 329353348

--
bf4d2a7f8b089e2adf14d32b0e39de0a981005c3 by Xiaoyi Zhang <zhangxy@google.com>:

Internal change

PiperOrigin-RevId: 329337031

--
42fa7d2fb993bbfc344954227cf1eeb801eca065 by Abseil Team <absl-team@google.com>:

Internal change

PiperOrigin-RevId: 329099807
GitOrigin-RevId: 23500704dd7c2642fad49f88c07ce41ebaab12e4
Change-Id: I6713e4ca3bb0ab2ced5e487827ae036ab8ac61f1

--
cc712eea29157198dc2ad001a0b8717bf6621074 by Abseil Team <absl-team@google.com>:

Quiet -Wsign-compare warning in AdvanceDigits().

PiperOrigin-RevId: 328972215

--
0b7a7ccd7c5c201062ed9671a8b2f5cc53b76ded by Abseil Team <absl-team@google.com>:

Quiet -Wsign-compare warning in ExtraWidthToPadding()

PiperOrigin-RevId: 328882525

--
df828f8e78276897ad0f8aed8a94ac9882f719ee by Abseil Team <absl-team@google.com>:

Quiet -Wsign-compare warning

PiperOrigin-RevId: 328840508
GitOrigin-RevId: cc712eea29157198dc2ad001a0b8717bf6621074
Change-Id: Ie7caa022ee308d84c2f3b5ff7a9b3d02e0f30587

--
ec39082e792ef7bb17e8432b6e10d1cb96dbad24 by Derek Mauro <dmauro@google.com>:

Fix a sign-compare warning in btree.h

Fixes #771

PiperOrigin-RevId: 328653403
GitOrigin-RevId: ec39082e792ef7bb17e8432b6e10d1cb96dbad24
Change-Id: I6b681dcda4fd8933257b06d0428d40b1d01f6ad1

--
9c9eb300c95024ea4242bbb4835595f555cb1eed by Derek Mauro <dmauro@google.com>:

Sync string_view comments from the internal copy

PiperOrigin-RevId: 328582796

--
c0bc4e77a46889430a1a40d836a5ff426a4a5bc9 by Xiaoyi Zhang <zhangxy@google.com>:

Make `absl::allocator_traits` an alias to `std::allocator_traits` for C++17 or
above. `std::allocator_traits` should have all its members since C++17 so we
don't need a backport.

PiperOrigin-RevId: 328258154

--
5599a3c0f2d865128057b5e267a397011cd032d0 by Derek Mauro <dmauro@google.com>:

Fix an #endif comment

Reported at https://groups.google.com/g/abseil-io/c/GRUdB0bBrG8/m/852HrgchCQAJ

PiperOrigin-RevId: 328247093

--
abd7e98088267f436e6c10779e574153ece015be by Abseil Team <absl-team@google.com>:

Don't call win32 APIs for UWP builds

symbolize.cc is including symbolize_win32.inc for all Windows builds,
including UWP builds. However, UWP doesn't have access to win32 APIs, so
it should instead include symbolize_unimplemented.inc.

This allows the necessary functions to still exist and be called, but
the win32 calls are not made.

This is part of the effort to enable Abseil in ANGLE:
https://anglebug.com/4873

PiperOrigin-RevId: 328226766

--
f622d3dfb804a6f427c1fd86ee69f47785b49483 by Greg Falcon <gfalcon@google.com>:

Remove incorrect claims of HASH_NAMESPACE support in Abseil hash.

The documentation presently claims that absl::Hash will look for legacy hashers (e.g, in the __gnu_cxx namespace) as controlled by the HASH_NAMESPACE preprocessor define, but this has never been true.

(Vestigial support for this appears in the form `ABSL_INTERNAL_LEGACY_HASH_NAMESPACE`, but this is not a supported extension point, as indicated by the use of `INTERNAL` in the name.)

PiperOrigin-RevId: 328154123

--
32b40a25efe1f7f7da98ce8faf3482c825464ed4 by Abseil Team <absl-team@google.com>:

Switch ABSL_INTERNAL_IGNORE_READS_ATTRIBUTE_ENABLED checks to defined().

PiperOrigin-RevId: 328151556
GitOrigin-RevId: 9c9eb300c95024ea4242bbb4835595f555cb1eed
Change-Id: Ib0686286f7889a976311e8cd2b35655765a8d033

--
c3565dd81a23f445f9f38d6ad209c3709957badb by Greg Falcon <gfalcon@google.com>:

Import of CCTZ from GitHub.

PiperOrigin-RevId: 327866702
GitOrigin-RevId: c3565dd81a23f445f9f38d6ad209c3709957badb
Change-Id: I34e68c7eab47c5234052f676b686cdaf3eb28352

--
9f746b79e16d36dba908ed9e2a586d890fe54acc by Derek Mauro <dmauro@google.com>:

Remove the Bazel mirror URL that we use in our WORKSPACE file

This doesn't appear to be supported. We use --distdir caching in our tests.

PiperOrigin-RevId: 327634738

--
e1f6f54830c415fc8bb8dc14483fae4cf9713d75 by Abseil Team <absl-team@google.com>:

Removing comments following license() rules as they are rarely useful, redundant with LICENSE files, and tend to fall out of date.

PiperOrigin-RevId: 327504063

--
b59c076638a57a74a3f8475f1dee8b536e32a15f by Gennadiy Rozental <rogeeff@google.com>:

Change GetAllFlags API to return a collection of mutable flag handles.

This will make this interface on par with FindCommandLineFlag and allow to call
CommandLineFlag::ParseFrom on the handle returned by GetAllFlags.
PiperOrigin-RevId: 327499084

--
bbf56b3c4a1d908d95e5a52aba38b1984151efff by Gennadiy Rozental <rogeeff@google.com>:

Make raw_hash_set compile when AllocTraits::propagate_on_container_swap is false.

PiperOrigin-RevId: 327371107

--
837f62c85ea65c1d6b847a75816198c625fe62ff by Abseil Team <absl-team@google.com>:

On macOS, `mem_alloc` is defined like this:

rpc/types.h:86:#define mem_alloc(bsize)	calloc(1, bsize)

So if that file is included before container_memory.h, the variable mem_alloc
may never get defined. This is fixed by using a different name.

PiperOrigin-RevId: 327360224

--
aa8f5528382c0d01239ce75b645723aaf7e1ef46 by Gennadiy Rozental <rogeeff@google.com>:

Release of absl::GetAllFlags API.

PiperOrigin-RevId: 327275943
GitOrigin-RevId: 9f746b79e16d36dba908ed9e2a586d890fe54acc
Change-Id: I99c5c87dd1712bf8df9a52397b0c1e400a3c3447

--
caf65de1a20b1ad286796a9eaee38f8b59e93f3b by Samuel Benzaquen <sbenza@google.com>:

Add a benchmark for StrAppend.

PiperOrigin-RevId: 327111569

--
2faa53fb3f4090f9609c7dea8951a82e1d72ce3a by Derek Mauro <dmauro@google.com>:

Add the inline namespace to the code generated by
gaussian_distribution_gentables

A previous changed manually added it to the output

PiperOrigin-RevId: 327022780

--
29edfd86e49e4d7665e843463f8df3c72467e909 by Derek Mauro <dmauro@google.com>:

Re-write the logic for detecting which stacktrace implementation to use on Linux.

The visible change is to detect the presence of the `<execinfo.h>`
header, which allows using the `backtrace`-based implementation when
it is available.

The logic has been simplified as well.

Fixes #746

PiperOrigin-RevId: 326911875

--
ce198204b77aac240e98fc8d5931b17a8b26bac3 by Abseil Team <absl-team@google.com>:

Demangle exception spec.

PiperOrigin-RevId: 326909460

--
c41b89954545bdc4430d10e785d3ba64a55122d5 by Abseil Team <absl-team@google.com>:

Add support for inheriting ctor.

PiperOrigin-RevId: 326904919
GitOrigin-RevId: caf65de1a20b1ad286796a9eaee38f8b59e93f3b
Change-Id: Ifd28b6a85a032839cbeafd1b16f88046dfd6c1d4

--
daabc2a08b55696424add36e8fd6ed0ab397dadc by Derek Mauro <dmauro@google.com>:

Internal change

PiperOrigin-RevId: 326713082
GitOrigin-RevId: daabc2a08b55696424add36e8fd6ed0ab397dadc
Change-Id: Ibe91394988bc3bcfaae7ac16bdc1e9b5dfd16588

--
0c8282d75798c77733eee6167870bcc6acc0bfc1 by Evan Brown <ezb@google.com>:

Provide mutable access to the key in node handles using std::launder when compiled with C++17 or later.

Also, document why we can't provide mutable access to the key without C++17.

Note: we use Policy::mutable_key() because btree already uses Policy::key() internally to get const key access, and we want to avoid calling std::launder unless we need mutable access to the key.
PiperOrigin-RevId: 326519000

--
8018d0c3044400f0a731b0d2d00b606742c98818 by Xiaoyi Zhang <zhangxy@google.com>:

Move `Status` internal symbols from the public header into an internal header file.

PiperOrigin-RevId: 326471847

--
87a7644864ba7c003b0611898aaba1b71c840376 by Abseil Team <absl-team@google.com>:

Avoid a costly divide (the division accounts for 10% of the time spent in the function).

When the division is signed, the compiler has to generate a div. When it is unsigned, it can generate a shift: https://godbolt.org/z/vGfTv4. As per the test above the div, we know that the value is unsigned.

PiperOrigin-RevId: 326453275
GitOrigin-RevId: 0c8282d75798c77733eee6167870bcc6acc0bfc1
Change-Id: I0a953558358055ab3dc6a533d8930698509b1195

--
240f86077dabaa58210e6b1a35cc442902409bf5 by Gennadiy Rozental <rogeeff@google.com>:

Fix the link to the Allocator concept description.

PiperOrigin-RevId: 326292363

--
d023337da5c7c23ec5f316c4e03efc4d8404ad63 by Gennadiy Rozental <rogeeff@google.com>:

Add -DNOMINMAX to gcc/clang build command line in case they are used to build Abseil on Windows.

Fixes #761

PiperOrigin-RevId: 326255039
GitOrigin-RevId: 240f86077dabaa58210e6b1a35cc442902409bf5
Change-Id: If8a40a9b2be9c0c1e652347e2f22e2fff6bbeaa1

--
feb01287934e6824d3a7be58a835e1d0254a353e by Derek Mauro <dmauro@google.com>:

Add a general question template to our issue templates

PiperOrigin-RevId: 326051081

--
cf3c0ab96f179e5396574b0a1dd655d6f48b031c by Derek Mauro <dmauro@google.com>:

Add a bug report issue template

PiperOrigin-RevId: 326026210

--
e67506083474736fee2a98c585383481b6bf6f2f by Xiaoyi Zhang <zhangxy@google.com>:

Internal change

PiperOrigin-RevId: 325885389

--
59c6ad5f6004e8c62ceb28611cbc88cd52b65a16 by Gennadiy Rozental <rogeeff@google.com>:

Internal change

PiperOrigin-RevId: 325836079
GitOrigin-RevId: feb01287934e6824d3a7be58a835e1d0254a353e
Change-Id: I303617dfb5f05aea0bec089c84e2b486f12882b2

--
30b56a21feab3443ba40cf97a3bfaa3d5b3bc964 by Derek Mauro <dmauro@google.com>:

Fix conversion warnings on 32-bit MSVC

Fixes #582

PiperOrigin-RevId: 325509591
GitOrigin-RevId: 30b56a21feab3443ba40cf97a3bfaa3d5b3bc964
Change-Id: Icf1786a974eb88ca417cd428c0ce43e8ee8048e7

--
880e4ea366ff27f2b5b0c2f693f05424a1e47fbf by Derek Mauro <dmauro@google.com>:

Import of CCTZ from GitHub.

PiperOrigin-RevId: 325351285
GitOrigin-RevId: 880e4ea366ff27f2b5b0c2f693f05424a1e47fbf
Change-Id: I9003e713eff7315f4d38ca5c88efe6151bc26ac4

--
c12db0cff0f0cb0c10731cdf4bf1663e99ecb82e by Samuel Benzaquen <sbenza@google.com>:

Fix incompatibility of retired flags and AddressSanitizer.

PiperOrigin-RevId: 325028944

--
20119dce82503c6ac22f3ec479d0eaea6acc7ba0 by Abseil Team <absl-team@google.com>:

Internal change

PiperOrigin-RevId: 324939694

--
bb1ab1a4e1a551469ad110bdfce3210aeb9bf4b8 by Abseil Team <absl-team@google.com>:

Teach Abseil stack consumption utilities about AArch64.

PiperOrigin-RevId: 324935395

--
987043ffc960f38457478b01c04b47dfaf7ae006 by Evan Brown <ezb@google.com>:

Cleanup: simplify the slot transfer methods a bit.

PiperOrigin-RevId: 324834817

--
ed7081130d3ab93a2c3c916e30fe4367d8e96954 by Abseil Team <absl-team@google.com>:

Pass __FILE__ as const char* instead of as array of chars to internal_log_function

to allow deterministic symbols for AtomicHook wrapper of the InternalLogFunction

PiperOrigin-RevId: 324800499
GitOrigin-RevId: c12db0cff0f0cb0c10731cdf4bf1663e99ecb82e
Change-Id: Ibb92b1cab465e45abc86281f0fba894c82a662df

--
790f9061df340cd900e8da70e66c363f7af3c2eb by Abseil Team <absl-team@google.com>:

Add support for rvalue reference to function types.

PiperOrigin-RevId: 324508531

--
51fe201dbb41a3ebc3d49ff65250b5f464279d43 by Abseil Team <absl-team@google.com>:

Cleaning up function comment style; no substantive change.

PiperOrigin-RevId: 324497401

--
da8595d5266577d0c170528d12f6de17b8affcc2 by Abseil Team <absl-team@google.com>:

Add support for demangling GNU vector types.

PiperOrigin-RevId: 324494559

--
0cb0acf88c1750f6963c9cb85249f9b4f0bd5104 by Abseil Team <absl-team@google.com>:

Add support for thread-local types.

PiperOrigin-RevId: 324491183

--
c676bc8380560599cd26f7f231e04e6be532e904 by Abseil Team <absl-team@google.com>:

Add support for demangling "Du" (char8_t).

PiperOrigin-RevId: 324441607

--
b218bf6467bc62b327214782c881e8224ad91509 by Abseil Team <absl-team@google.com>:

Update doc comments in header of `any.h` to reflect that `absl::variant` has been released.

PiperOrigin-RevId: 324431690

--
e5b579f3f1aa598c1f62e71dba7103b98811de59 by Laramie Leavitt <lar@google.com>:

Bugfix: Fix bounds in absl::Uniform where one of the bounds is min/max.

When absl::Uniform(rng, tag, a, b) is called, the tag is used in conjunction with the type to determine whether or not to manipulate the bounds to make them inclusive or exclusive through the uniform_*_bound functions. Unfortunately, at limits of the interval the function was not well behaved.

The previous implementation used wrapping arithmetic. This causes incorrect bounds computation at the extremes (numeric_limits::min / numeric_limits::max) the bound would wrap.

Improve this situation by:

1/ Changing the uniform_*_bound functions to use saturating arithmetic instead of wrapping, thus in the unsigned case, the upper_bound of IntervalOpenOpen for 0 is now 0, rather than numeric_limits::max, likewise for the lower bound.

2/ Adjusting the hi/lo checks in the distributions. When the interval is empty, such as for absl::Uniform(absl::IntervalOpenOpen, gen, 1, 0), the return value is somewhat nonsensical. Now absl::Uniform more consistently returns the low input rather than any adjusted input. In the above case, that means that 1 is returned rather than 2.

NOTE: Calls to absl::Uniform where the resolved upper bound is < the lower bound  are still ill-formed and should be avoided.

3/ Adding better tests.

The underlying uniform_*_distribution classes are not affected.

PiperOrigin-RevId: 324240873
GitOrigin-RevId: 790f9061df340cd900e8da70e66c363f7af3c2eb
Change-Id: I2a2208650ea3135c575e200b868ce1d275069fc8

--
587e6db882749fa7faa12815e614afab04d218b9 by Derek Mauro <dmauro@google.com>:

Use attribute detection for other sanitizer related attributes

PiperOrigin-RevId: 324077073

--
3ee55e4935b4235516b1fcac3c55945e510f7afc by Evan Brown <ezb@google.com>:

Simplify CordRepExternal allocation/deallocation.

I think this can save some memory when `Releaser` is empty and when on platforms where alignof(CordRepExternal) < (default `::operator new` alignment).

We no longer need the API requirement that alignof(Releaser) <= (default `::operator new` alignment).

Also remove another static_assert from a TODO in cord_internal.h and fix some warnings about calling std::move on a forwarding reference.

PiperOrigin-RevId: 324053720

--
9fc78436565eb3b204d4aa425ee3773354392f45 by Derek Mauro <dmauro@google.com>:

Use auto-detected sanitizer attributes for ASAN, MSAN, and TSAN builds

PiperOrigin-RevId: 323831461
GitOrigin-RevId: 587e6db882749fa7faa12815e614afab04d218b9
Change-Id: Ie0e4a2846d7f66988a2d81a5e50721b62fdb3d6d

--
41ac0d9b32618a1df717984afcb808858089bda7 by Derek Mauro <dmauro@google.com>:

Removes usages of deprecated RunningOnValgrind

PiperOrigin-RevId: 323649256

--
5453d131af475b434dcd86ab326e4a2cf780857f by Abseil Team <absl-team@google.com>:

Internal change.

PiperOrigin-RevId: 323630307
GitOrigin-RevId: 41ac0d9b32618a1df717984afcb808858089bda7
Change-Id: I523016e0ecdb8d141aa069ad2846f5e4abbe014c

--
e1d2e93a3328d9e4362c5510e81bd15ddd0dcf00 by Derek Mauro <dmauro@google.com>:

ROLLBACK: Use auto-detected sanitizer attributes for ASAN, MSAN, and TSAN builds

PiperOrigin-RevId: 323612219

--
6fe0914715bcb680ac1dc533aae3461e2ca1ad50 by Derek Mauro <dmauro@google.com>:

Use auto-detected sanitizer attributes for ASAN, MSAN, and TSAN builds

PiperOrigin-RevId: 323597765

--
9ad74e277348585f06a511aac31fff917a89a5d7 by Mark Barolak <mbar@google.com>:

Import of CCTZ from GitHub.

PiperOrigin-RevId: 323594550

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9e77ccb5adf7e9867cfa254105930f8fed19699d by Evan Brown <ezb@google.com>:

Remove an unnecessary nullptr check in Cord::PrependTree().

We already check for nullptr at all callsites.

PiperOrigin-RevId: 323583641

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31ab2355c1b91e474b67ff88b8597ad99f346511 by Gennadiy Rozental <rogeeff@google.com>:

Avoid memory allocations while registering retired flags.

PiperOrigin-RevId: 323523011

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33435e9b97b31763a80d3e41b5ab2459e862e99a by Jorg Brown <jorg@google.com>:

Allow ABSL_PREDICT_FALSE to be used with a type that's explicitly convertible to bool.

So far ABSL_PREDICT_TRUE could be used with these, but not ABSL_PREDICT_FALSE.

PiperOrigin-RevId: 323514860
GitOrigin-RevId: e1d2e93a3328d9e4362c5510e81bd15ddd0dcf00
Change-Id: Iee5b030d9aec1ae2c0fe8997763cee7bd84b4090

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8726480d631a3736347f542dab5628d5e2ace3c1 by Mark Barolak <mbar@google.com>:

Import of CCTZ from GitHub.

PiperOrigin-RevId: 323414814

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abc4a382a29fb857432e0e13a8c21ebe808f9828 by Abseil Team <absl-team@google.com>:

Fix buffer overflow when the result of demangling doesn't fit.

PiperOrigin-RevId: 323392968

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7ed3e514519a971322d0a3333c7e85ed1f2a5f71 by Gennadiy Rozental <rogeeff@google.com>:

Move ABSL_DEPRECATED and ABSL_FALLTHROUGH_INTENDED from base.h into attribute.h.

PiperOrigin-RevId: 323137526

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fc0afdb0792d565065d25feb9680972218355f90 by Xiaoyi Zhang <zhangxy@google.com>:

Add documentation for `absl::StatusCode`.

PiperOrigin-RevId: 323065623
GitOrigin-RevId: 8726480d631a3736347f542dab5628d5e2ace3c1
Change-Id: I9d39650e49ff265cd2dafee302013694e97c813f

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873b52b0a691e759413c5db27dafc541a5da5263 by Andy Getzendanner <durandal@google.com>:

Introduce an internal-only thread-local caching wrapper around GetTID.

PiperOrigin-RevId: 323055682

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091a4537f1ef6e158acbf4261cfae1af7a3bdb7f by Abseil Team <absl-team@google.com>:

Internal change

PiperOrigin-RevId: 322864497

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c80ccfff2a825819f31826a30f48cca3297699f8 by Evan Brown <ezb@google.com>:

Roll forward b-tree changes simplifying deletion and getting rid of recursion in clear_and_delete().

We also change clear_and_delete() to avoid some unnecessary comparisons by restructuring the loops.

PiperOrigin-RevId: 322658938

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81464c0fb9c8c6268dca2e530aba99e75e1e59ae by Gennadiy Rozental <rogeeff@google.com>:

Eliminate definition of RunningOnValgrind inside the library.

Fixes #674
Fixes #657

PiperOrigin-RevId: 322508440
GitOrigin-RevId: 873b52b0a691e759413c5db27dafc541a5da5263
Change-Id: I20b40c9e8fc62edcf981caab467cca33cf6fd2ba

--
dcd4d95f6201dc5781a3a374be8eb10c812fd98a by Derek Mauro <dmauro@google.com>:

Add -Wundef to GCC warnings

PiperOrigin-RevId: 322388155

--
b030746368262aff6bc487f5525bcd9b32d18ebb by Abseil Team <absl-team@google.com>:

Google internal clean-up.

PiperOrigin-RevId: 322381901

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18e4cfcd50730c493cfc0cf1e127e57c186ce90b by Evan Brown <ezb@google.com>:

Rollback b-tree erase simplification change.

PiperOrigin-RevId: 322368252

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d15431c52fa7ccb25ffbd967fd11f8f58246d48a by Abseil Team <absl-team@google.com>:

Update MOCK_METHOD (new format) in memory/memory_test.cc

PiperOrigin-RevId: 322208282
GitOrigin-RevId: dcd4d95f6201dc5781a3a374be8eb10c812fd98a
Change-Id: I3a900b4993f86bdd1c9597819c7a0e6e1759eda3

--
763b4755cc65db94fb1d6c09655f77deee685698 by Evan Brown <ezb@google.com>:

Rollback change getting rid of recursion in clear_and_delete().

PiperOrigin-RevId: 322156175

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e430ae6970ae2e76357876449878033e3c72e734 by Greg Falcon <gfalcon@google.com>:

fix build on P9

Import of https://github.com/abseil/abseil-cpp/pull/739

PiperOrigin-RevId: 321855200

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3076c5bf811a950e7f7914023434d4aa9c0fbbb0 by Derek Mauro <dmauro@google.com>:

Check for the existence of CMake policies before using them
Fixes #742

PiperOrigin-RevId: 321798698
GitOrigin-RevId: 763b4755cc65db94fb1d6c09655f77deee685698
Change-Id: I641e42f8bebe236b75f1bf1116a129c2ad9b2571

--
d2b7a83bafb90d35b2b7d8eb4177e9d712e8d62c by Gennadiy Rozental <rogeeff@google.com>:

Introduce ABSL specific macros for detecting the usage of sanitizers.

PiperOrigin-RevId: 321687443

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a41342cc04b1088087dda12d7272aa3835f8e36a by Evan Brown <ezb@google.com>:

Get rid of recursion in clear_and_delete().

PiperOrigin-RevId: 321583786

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99c6d300b17f186c28867b08cc79f1e55077e88a by Evan Brown <ezb@google.com>:

Code simplification: consolidate methods to erase values/nodes.

Motivation: this will make floating storage work simpler.

- Delete erase_same_node/erase_from_leaf_node/remove_value/remove_values_ignore_children.
- Move node deletion methods inside btree_node.
- Delete three-argument move() and use transfer_n() instead.
- Note: there's still one usage of move (in btree::erase(iterator)) that could use transfer, but I think doing so would add more complexity than it's worth.

PiperOrigin-RevId: 321407673

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c3efed6c1763190c6b3bccbede9b2989ab21b258 by Evan Brown <ezb@google.com>:

Support heterogeneous insert_or_assign, try_emplace, operator[] for btree_map.

Also do a bit of cleanup:
- Add _impl methods for insert_or_assign/try_emplace.
- Rename some hint iterator params from `position` to `hint`.

PiperOrigin-RevId: 321399557
GitOrigin-RevId: d2b7a83bafb90d35b2b7d8eb4177e9d712e8d62c
Change-Id: Ie2d0c7c3ed197c2b53d475248941392cbad20e59

--
4fc38390e66394e51ef4637ca0778f929017b4c8 by Gennadiy Rozental <rogeeff@google.com>:

Internal Change

PiperOrigin-RevId: 321020681

--
880d1c1cb7590e7265e21afe32edde473ef830d4 by Derek Mauro <dmauro@google.com>:

Decrease number of threads in thread_identity_test to hopefully
prevent test timeouts

PiperOrigin-RevId: 321019403
GitOrigin-RevId: 4fc38390e66394e51ef4637ca0778f929017b4c8
Change-Id: Id8175bae6e490277d663d76fff9c06353b8c7f05

--
69b3ab092ee0fef3d27f589e709280c341f006c6 by Greg Falcon <gfalcon@google.com>:

Import of CCTZ from GitHub.

PiperOrigin-RevId: 321005878

--
3a4038cd0cea6455453a7ae82f2de7e91d7e2bc1 by Abseil Team <absl-team@google.com>:

Google-internal changes only.

PiperOrigin-RevId: 320994821

--
f9d9a93782924df6ffc351a271c239ca4bdff3c8 by Derek Mauro <dmauro@google.com>:

Update Linux latest toolchains, most notably to GCC 10.1

This create a new "hybrid" docker image that includes the latest
versions of both GCC and LLVM. Since the LLVM build targets Debian 10,
but Debian 10 uses an older version of libstdc++ that doesn't have
full C++20 support, the easiest solution is to use the GCC/Debian 10
base image from DockerHub and copy LLVM into it.

This also includes fixes to get the build working with the
new toolchains.

PiperOrigin-RevId: 320991795

--
43129cd66dc4439b36d85030800a3929f20d9f86 by Abseil Team <absl-team@google.com>:

Rollback import of CCTZ from GitHub (breaks MSAN tests)

  - e87b391f0d10ae9c3d2e70e4a3633337d2c5e643 handle "slim" TZif files in TimeZoneInfo::ExtendTransitio... by Bradley White <14679271+devbww@users.noreply.github.com>

PiperOrigin-RevId: 320978767

--
2a343a55f297d433c1521920f0bd20ddd2dc71e8 by Derek Mauro <dmauro@google.com>:

Use ABSL_HAVE_ATTRIBUTE in thread_annotations.h

PiperOrigin-RevId: 320956378

--
f6f3e8333c9ef6e6441586be6587bbfb1c8c8127 by Gennadiy Rozental <rogeeff@google.com>:

Import of CCTZ from GitHub.

PiperOrigin-RevId: 320952592

--
3cc2bcce3533ac1233c0536232b07eea45fe8ed0 by Derek Mauro <dmauro@google.com>:

Internal change

PiperOrigin-RevId: 320862698

--
4e22066476744609e42c475b55e3cbd874f04c39 by Gennadiy Rozental <rogeeff@google.com>:

Internal change

PiperOrigin-RevId: 320461277
GitOrigin-RevId: 69b3ab092ee0fef3d27f589e709280c341f006c6
Change-Id: I36f547711e7078d52f2e0a1ff3f4c903056a2b9e

* Disable pthread for wasm build support

* wasm -> wasm32

It is already performed by CTest module
ref: https://github.com/Kitware/CMake/blob/43372d5ba34d2a95a886f39a254870c122e98fa2/Modules/CTest.cmake#L83-L84

All libraries depending on any gmock target should be flagged as TESTONLY

--
4833151c207fac9f57a735efe6d5db4c83368415 by Gennadiy Rozental <rogeeff@google.com>:

Import of CCTZ from GitHub.

PiperOrigin-RevId: 320398694

--
a1becb36b223230f0a45f204a5fb33b83d2deffe by Gennadiy Rozental <rogeeff@google.com>:

Update CMakeLists.txt

Import of https://github.com/abseil/abseil-cpp/pull/737

PiperOrigin-RevId: 320391906

--
b529c45856fe7a3447f1f3259286d57e13b1f292 by Abseil Team <absl-team@google.com>:

Improves a comment about use of absl::Condition.

PiperOrigin-RevId: 320384329

--
c7b1dacda2739c10dc1ccbfb56b07ed7fe2464a4 by Laramie Leavitt <lar@google.com>:

Improve FastUniformBits performance for std::minstd_rand.

The rejection algorithm was too pessimistic before, and not in line with the [rand.adapt.ibits]. Specifically, when sampling from an URBG with a non power of 2 range, FastUniformBits constructed a rejection threshold with a power-of-2 range that was too restrictive.

For example, minstd_rand has a range of
  [1, 2147483646], which has a range of 2145386495, or about 30.999 bits.

Before FastUniformBits rejected values between 1<<30 and 2145386495, which includes approximately 50% of the generated values. However, since a minimum of 3 calls are required to generate a full 64-bit value from an entropy pool of 30.9 bits, the correct value for rejection sampling is the range value which masks 21 (0x7fe00000) or 22 bits and rejects values greater than that.  This reduces the probability of rejecting a sample to about 0.1%

NOTE: Abseil random does not guarantee sequence stability over time, and this is expected to change sequences in some cases.
PiperOrigin-RevId: 320285836

--
15800a39557a07dd52e0add66a0ab67aed00590b by Gennadiy Rozental <rogeeff@google.com>:

Internal change.

PiperOrigin-RevId: 320220913

--
ef39348360873f6d19669755fe0b5d09a945a501 by Gennadiy Rozental <rogeeff@google.com>:

Internal change

PiperOrigin-RevId: 320181729

--
4f9f6ef8034a24da1832e4c838c72f80fc2ea062 by Gennadiy Rozental <rogeeff@google.com>:

Internal change

PiperOrigin-RevId: 320176084

--
6bfc8008462801657d231585bd5c37fc18bb25b6 by Gennadiy Rozental <rogeeff@google.com>:

Internal change

PiperOrigin-RevId: 320176070

--
b35b055ab1f41e6056031ff0641cabab23530027 by Abseil Team <absl-team@google.com>:

Disabling using header module as well as building one for randen_hwaes_impl

PiperOrigin-RevId: 320024299
GitOrigin-RevId: 4833151c207fac9f57a735efe6d5db4c83368415
Change-Id: I9cf102dbf46ed07752a508b7cda3ab3858857d0d

by not setting when ABSL_IDE_FOLDER is provided from outside.

This allows to move Abseil into e.g. a 3rd party lib folder when used
in a larger project.