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flutter / third_party / abseil-cpp / b40b412c522cd68fd31785014ce448f8a4e745ee
commitb40b412c522cd68fd31785014ce448f8a4e745ee[log] [tgz]
authorVictor Hugo Vianna Silva <victorvianna@google.com>Mon Mar 10 19:15:52 2025 -0700
committerCopybara-Service <copybara-worker@google.com>Mon Mar 10 19:23:29 2025 -0700
tree86116a79567a7307fb9dc061c4caded4f7220fd0
parentb98f58cbf1dbc00bfbcf378528e6cc04f0bdf3b4 [diff]
Make absl::variant a typedef for std::variant

This is a re-upload of https://crrev.com/c/5469234, see original
description below. Differences from the original CL:
- Windows symbol definition files were regenerated with
  generate_def_files.py.
- New build fixes in password_store_consumer.h,
  plus_address_jit_allocator_unittest.cc and mojo_proxy_test.cc.
- Revert change in enclave_protocol_utils.cc, it doesn't seem needed
  anymore.

We estimate that ~75% of the regression shown by the
android-binary-size bot will recover after PGO profiles are updated.
See comments 34 to 42 in the linked bug for some numbers.

Original CL description:
"
Discussion thread: https://groups.google.com/u/1/a/chromium.org/g/cxx/c/0EhbuwD-Dpw/m/lbGjN1sxAgAJ

This commit is an updated/tuned version of
David Benjamin's patches (5313884, 5314107).
This only changes the types around. It doesn't rewrite the existing
uses, which we can do incrementally.
"

Binary-Size: See commit description.
Bug: 40242126
Change-Id: I42d8bce14761e9120d154d212940fe72cfdcfd05
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6330348
Auto-Submit: Victor Vianna <victorvianna@google.com>
Reviewed-by: Nico Weber <thakis@chromium.org>
Commit-Queue: Nico Weber <thakis@chromium.org>
Owners-Override: Nico Weber <thakis@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1430612}
NOKEYCHECK=True
GitOrigin-RevId: c01ae649582b75bce39769132a5a41bec8e2d3e4
10 files changed
tree: 86116a79567a7307fb9dc061c4caded4f7220fd0
  1. .github/
  2. absl/
  3. ci/
  4. CMake/
  5. patches/
  6. ABSEIL_ISSUE_TEMPLATE.md
  7. absl.gni
  8. absl_hardening_test.cc
  9. AUTHORS
  10. BUILD.bazel
  11. BUILD.gn
  12. CMakeLists.txt
  13. conanfile.py
  14. CONTRIBUTING.md
  15. create_lts.py
  16. DIR_METADATA
  17. FAQ.md
  18. generate_def_files.py
  19. LICENSE
  20. MODULE.bazel
  21. OWNERS
  22. PrivacyInfo.xcprivacy
  23. README.chromium
  24. README.md
  25. roll_abseil.py
  26. symbols_arm64_dbg.def
  27. symbols_arm64_rel.def
  28. symbols_x64_dbg.def
  29. symbols_x64_rel.def
  30. symbols_x64_rel_asan.def
  31. symbols_x86_dbg.def
  32. symbols_x86_rel.def
  33. UPGRADES.md
README.md

Abseil - C++ Common Libraries

The repository contains the Abseil C++ library code. Abseil is an open-source collection of C++ code (compliant to C++17) designed to augment the C++ standard library.

Table of Contents

About Abseil

Abseil is an open-source collection of C++ library code designed to augment the C++ standard library. The Abseil library code is collected from Google's own C++ code base, has been extensively tested and used in production, and is the same code we depend on in our daily coding lives.

In some cases, Abseil provides pieces missing from the C++ standard; in others, Abseil provides alternatives to the standard for special needs we've found through usage in the Google code base. We denote those cases clearly within the library code we provide you.

Abseil is not meant to be a competitor to the standard library; we've just found that many of these utilities serve a purpose within our code base, and we now want to provide those resources to the C++ community as a whole.

Quickstart

If you want to just get started, make sure you at least run through the Abseil Quickstart. The Quickstart contains information about setting up your development environment, downloading the Abseil code, running tests, and getting a simple binary working.

Building Abseil

Bazel and CMake are the official build systems for Abseil. See the quickstart for more information on building Abseil using the Bazel build system. If you require CMake support, please check the CMake build instructions and CMake Quickstart.

Support

Abseil follows Google's Foundational C++ Support Policy. See this table for a list of currently supported versions compilers, platforms, and build tools.

Codemap

Abseil contains the following C++ library components:

  • base
    The base library contains initialization code and other code which all other Abseil code depends on. Code within base may not depend on any other code (other than the C++ standard library).
  • algorithm
    The algorithm library contains additions to the C++ <algorithm> library and container-based versions of such algorithms.
  • cleanup
    The cleanup library contains the control-flow-construct-like type absl::Cleanup which is used for executing a callback on scope exit.
  • container
    The container library contains additional STL-style containers, including Abseil's unordered “Swiss table” containers.
  • crc The crc library contains code for computing error-detecting cyclic redundancy checks on data.
  • debugging
    The debugging library contains code useful for enabling leak checks, and stacktrace and symbolization utilities.
  • flags
    The flags library contains code for handling command line flags for libraries and binaries built with Abseil.
  • hash
    The hash library contains the hashing framework and default hash functor implementations for hashable types in Abseil.
  • log
    The log library contains LOG and CHECK macros and facilities for writing logged messages out to disk, stderr, or user-extensible destinations.
  • memory
    The memory library contains memory management facilities that augment C++'s <memory> library.
  • meta
    The meta library contains type checks similar to those available in the C++ <type_traits> library.
  • numeric
    The numeric library contains 128-bit integer types as well as implementations of C++20's bitwise math functions.
  • profiling
    The profiling library contains utility code for profiling C++ entities. It is currently a private dependency of other Abseil libraries.
  • random
    The random library contains functions for generating pseudorandom values.
  • status
    The status library contains abstractions for error handling, specifically absl::Status and absl::StatusOr<T>.
  • strings
    The strings library contains a variety of strings routines and utilities.
  • synchronization
    The synchronization library contains concurrency primitives (Abseil's absl::Mutex class, an alternative to std::mutex) and a variety of synchronization abstractions.
  • time
    The time library contains abstractions for computing with absolute points in time, durations of time, and formatting and parsing time within time zones.
  • types
    The types library contains non-container utility types.
  • utility
    The utility library contains utility and helper code.

Releases

Abseil recommends users “live-at-head” (update to the latest commit from the master branch as often as possible). However, we realize this philosophy doesn't work for every project, so we also provide Long Term Support Releases to which we backport fixes for severe bugs. See our release management document for more details.

License

The Abseil C++ library is licensed under the terms of the Apache license. See LICENSE for more information.

Links

For more information about Abseil: