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Summary: This check is similar to an ARC Migration check that warned about this incorrect usage under ARC, but most projects are no longer undergoing migration from pre-ARC code. The documentation for NSInvocation is not explicit about these requirements and incorrect usage has been found in many of our projects. Reviewers: stephanemoore, benhamilton, dmaclach, alexfh, aaron.ballman, hokein, njames93 Reviewed By: stephanemoore, benhamilton, aaron.ballman Subscribers: xazax.hun, Eugene.Zelenko, mgorny, cfe-commits Tags: #clang, #clang-tools-extra Differential Revision: https://reviews.llvm.org/D77571
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====================================================
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Extra Clang Tools 11.0.0 (In-Progress) Release Notes
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====================================================
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.. contents::
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:local:
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:depth: 3
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Written by the `LLVM Team <https://llvm.org/>`_
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.. warning::
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These are in-progress notes for the upcoming Extra Clang Tools 11 release.
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Release notes for previous releases can be found on
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`the Download Page <https://releases.llvm.org/download.html>`_.
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Introduction
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============
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This document contains the release notes for the Extra Clang Tools, part of the
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Clang release 11.0.0. Here we describe the status of the Extra Clang Tools in
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some detail, including major improvements from the previous release and new
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feature work. All LLVM releases may be downloaded from the `LLVM releases web
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site <https://llvm.org/releases/>`_.
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For more information about Clang or LLVM, including information about
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the latest release, please see the `Clang Web Site <https://clang.llvm.org>`_ or
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the `LLVM Web Site <https://llvm.org>`_.
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Note that if you are reading this file from a Git checkout or the
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main Clang web page, this document applies to the *next* release, not
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the current one. To see the release notes for a specific release, please
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see the `releases page <https://llvm.org/releases/>`_.
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What's New in Extra Clang Tools 11.0.0?
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=======================================
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Some of the major new features and improvements to Extra Clang Tools are listed
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here. Generic improvements to Extra Clang Tools as a whole or to its underlying
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infrastructure are described first, followed by tool-specific sections.
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Major New Features
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------------------
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...
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Improvements to clangd
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----------------------
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The improvements are...
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Improvements to clang-doc
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-------------------------
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The improvements are...
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Improvements to clang-query
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---------------------------
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The improvements are...
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Improvements to clang-rename
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----------------------------
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The improvements are...
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Improvements to clang-tidy
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--------------------------
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New module
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^^^^^^^^^^
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- New module `llvmlibc`.
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This module contains checks related to the LLVM-libc coding standards.
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New checks
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^^^^^^^^^^
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- New :doc:`cppcoreguidelines-avoid-non-const-global-variables
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<clang-tidy/checks/cppcoreguidelines-avoid-non-const-global-variables>` check.
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Finds non-const global variables as described in check I.2 of C++ Core
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Guidelines.
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- New :doc:`bugprone-misplaced-pointer-arithmetic-in-alloc
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<clang-tidy/checks/bugprone-misplaced-pointer-arithmetic-in-alloc>` check.
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Finds cases where an integer expression is added to or subtracted from the
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result of a memory allocation function (``malloc()``, ``calloc()``,
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``realloc()``, ``alloca()``) instead of its argument.
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- New :doc:`bugprone-spuriously-wake-up-functions
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<clang-tidy/checks/bugprone-spuriously-wake-up-functions>` check.
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Finds ``cnd_wait``, ``cnd_timedwait``, ``wait``, ``wait_for``, or
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``wait_until`` function calls when the function is not invoked from a loop
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that checks whether a condition predicate holds or the function has a
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condition parameter.
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- New :doc:`bugprone-reserved-identifier
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<clang-tidy/checks/bugprone-reserved-identifier>` check.
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Checks for usages of identifiers reserved for use by the implementation.
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- New :doc:`bugprone-suspicious-include
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<clang-tidy/checks/bugprone-suspicious-include>` check.
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Finds cases where an include refers to what appears to be an implementation
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file, which often leads to hard-to-track-down ODR violations, and diagnoses
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them.
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- New :doc:`cert-oop57-cpp
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<clang-tidy/checks/cert-oop57-cpp>` check.
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Flags use of the `C` standard library functions ``memset``, ``memcpy`` and
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``memcmp`` and similar derivatives on non-trivial types.
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- New :doc:`llvmlibc-implementation-in-namespace
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<clang-tidy/checks/llvmlibc-implementation-in-namespace>` check.
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Checks all llvm-libc implementation is within the correct namespace.
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- New :doc:`llvmlibc-restrict-system-libc-headers
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<clang-tidy/checks/llvmlibc-restrict-system-libc-headers>` check.
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Finds includes of system libc headers not provided by the compiler within
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llvm-libc implementations.
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- New :doc:`objc-dealloc-in-category
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<clang-tidy/checks/objc-dealloc-in-category>` check.
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Finds implementations of -dealloc in Objective-C categories.
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- New :doc:`misc-no-recursion
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<clang-tidy/checks/misc-no-recursion>` check.
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Finds recursive functions and diagnoses them.
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- New :doc:`objc-nsinvocation-argument-lifetime
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<clang-tidy/checks/objc-nsinvocation-argument-lifetime>` check.
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Finds calls to ``NSInvocation`` methods under ARC that don't have proper
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argument object lifetimes.
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New check aliases
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^^^^^^^^^^^^^^^^^
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- New alias :doc:`cert-con36-c
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<clang-tidy/checks/cert-con36-c>` to
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:doc:`bugprone-spuriously-wake-up-functions
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<clang-tidy/checks/bugprone-spuriously-wake-up-functions>` was added.
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- New alias :doc:`cert-con54-cpp
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<clang-tidy/checks/cert-con54-cpp>` to
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:doc:`bugprone-spuriously-wake-up-functions
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<clang-tidy/checks/bugprone-spuriously-wake-up-functions>` was added.
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- New alias :doc:`cert-dcl37-c
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<clang-tidy/checks/cert-dcl37-c>` to
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:doc:`bugprone-reserved-identifier
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<clang-tidy/checks/bugprone-reserved-identifier>` was added.
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- New alias :doc:`cert-dcl51-cpp
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<clang-tidy/checks/cert-dcl51-cpp>` to
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:doc:`bugprone-reserved-identifier
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<clang-tidy/checks/bugprone-reserved-identifier>` was added.
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Changes in existing checks
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^^^^^^^^^^^^^^^^^^^^^^^^^^
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- Improved :doc:`readability-qualified-auto
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<clang-tidy/checks/readability-qualified-auto>` check now supports a
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`AddConstToQualified` to enable adding ``const`` qualifiers to variables
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typed with ``auto *`` and ``auto &``.
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- Improved :doc:`readability-redundant-string-init
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<clang-tidy/checks/readability-redundant-string-init>` check now supports a
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`StringNames` option enabling its application to custom string classes. The
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check now detects in class initializers and constructor initializers which
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are deemed to be redundant.
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- Checks supporting the ``HeaderFileExtensions`` flag now support ``;`` as a
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delimiter in addition to ``,``, with the latter being deprecated as of this
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release. This simplifies how one specifies the options on the command line:
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``--config="{CheckOptions: [{ key: HeaderFileExtensions, value: h;;hpp;hxx }]}"``
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Renamed checks
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^^^^^^^^^^^^^^
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- The 'fuchsia-restrict-system-headers' check was renamed to :doc:`portability-restrict-system-includes
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<clang-tidy/checks/portability-restrict-system-includes>`
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Improvements to include-fixer
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-----------------------------
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The improvements are...
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Improvements to clang-include-fixer
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-----------------------------------
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The improvements are...
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Improvements to modularize
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--------------------------
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The improvements are...
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Improvements to pp-trace
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------------------------
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The improvements are...
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Clang-tidy visual studio plugin
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-------------------------------
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