==================================================== Extra Clang Tools |release| |ReleaseNotesTitle| ==================================================== .. contents:: :local: :depth: 3 Written by the `LLVM Team `_ .. only:: PreRelease .. warning:: These are in-progress notes for the upcoming Extra Clang Tools |version| release. Release notes for previous releases can be found on `the Download Page `_. Introduction ============ This document contains the release notes for the Extra Clang Tools, part of the Clang release |release|. Here we describe the status of the Extra Clang Tools in some detail, including major improvements from the previous release and new feature work. All LLVM releases may be downloaded from the `LLVM releases web site `_. For more information about Clang or LLVM, including information about the latest release, please see the `Clang Web Site `_ or the `LLVM Web Site `_. Note that if you are reading this file from a Git checkout or the main Clang web page, this document applies to the *next* release, not the current one. To see the release notes for a specific release, please see the `releases page `_. What's New in Extra Clang Tools |release|? ========================================== Some of the major new features and improvements to Extra Clang Tools are listed here. Generic improvements to Extra Clang Tools as a whole or to its underlying infrastructure are described first, followed by tool-specific sections. Major New Features ------------------ - The ``clang-pseudo`` tool is incomplete and does not have active maintainers, so it has been removed. See `the RFC `_ for more details. ... Improvements to clangd ---------------------- Inlay hints ^^^^^^^^^^^ - Added `DefaultArguments` Inlay Hints option. Diagnostics ^^^^^^^^^^^ Semantic Highlighting ^^^^^^^^^^^^^^^^^^^^^ Compile flags ^^^^^^^^^^^^^ Hover ^^^^^ Code completion ^^^^^^^^^^^^^^^ - Added completion for C++20 keywords. Code actions ^^^^^^^^^^^^ - Added `Swap operands` tweak for certain binary operators. - Improved the extract-to-function code action to allow extracting statements with overloaded operators like ``<<`` of ``std::ostream``. Signature help ^^^^^^^^^^^^^^ Cross-references ^^^^^^^^^^^^^^^^ Objective-C ^^^^^^^^^^^ Miscellaneous ^^^^^^^^^^^^^ - The DefineOutline tweak now handles member functions of class templates. Improvements to clang-doc ------------------------- Improvements to clang-query --------------------------- - Added `set enable-profile true/false` command for basic matcher profiling. Improvements to clang-tidy -------------------------- - Improved :program:`clang-tidy`'s `--verify-config` flag by adding support for the configuration options of the `Clang Static Analyzer Checks `_. - Improved :program:`run-clang-tidy.py` script. Fixed minor shutdown noise happening on certain platforms when interrupting the script. New checks ^^^^^^^^^^ - New :doc:`bugprone-bitwise-pointer-cast ` check. Warns about code that tries to cast between pointers by means of ``std::bit_cast`` or ``memcpy``. - New :doc:`bugprone-nondeterministic-pointer-iteration-order ` check. Finds nondeterministic usages of pointers in unordered containers. - New :doc:`bugprone-tagged-union-member-count ` check. Gives warnings for tagged unions, where the number of tags is different from the number of data members inside the union. - New :doc:`modernize-use-integer-sign-comparison ` check. Replace comparisons between signed and unsigned integers with their safe C++20 ``std::cmp_*`` alternative, if available. - New :doc:`portability-template-virtual-member-function ` check. Finds cases when an uninstantiated virtual member function in a template class causes cross-compiler incompatibility. New check aliases ^^^^^^^^^^^^^^^^^ - New alias :doc:`cert-arr39-c ` to :doc:`bugprone-sizeof-expression ` was added. Changes in existing checks ^^^^^^^^^^^^^^^^^^^^^^^^^^ - Improved :doc:`altera-id-dependent-backward-branch ` check by fixing crashes from invalid code. - Improved :doc:`bugprone-branch-clone ` check to improve detection of branch clones by now detecting duplicate inner and outer if statements. - Improved :doc:`bugprone-casting-through-void ` check to suggest replacing the offending code with ``reinterpret_cast``, to more clearly express intent. - Improved :doc:`bugprone-dangling-handle ` check to treat `std::span` as a handle class. - Improved :doc:`bugprone-exception-escape ` by fixing false positives when a consteval function with throw statements. - Improved :doc:`bugprone-forwarding-reference-overload ` check by fixing a crash when determining if an ``enable_if[_t]`` was found. - Improved :doc:`bugprone-optional-value-conversion ` to support detecting conversion directly by ``std::make_unique`` and ``std::make_shared``. - Improved :doc:`bugprone-posix-return ` check to support integer literals as LHS and posix call as RHS of comparison. - Improved :doc:`bugprone-return-const-ref-from-parameter ` check to diagnose potential dangling references when returning a ``const &`` parameter by using the conditional operator ``cond ? var1 : var2`` and fixing false positives for functions which contain lambda and ignore parameters with ``[[clang::lifetimebound]]`` attribute. - Improved :doc:`bugprone-sizeof-expression ` check to find suspicious usages of ``sizeof()``, ``alignof()``, and ``offsetof()`` when adding or subtracting from a pointer directly or when used to scale a numeric value and fix false positive when sizeof expression with template types. - Improved :doc:`bugprone-throw-keyword-missing ` by fixing a false positive when using non-static member initializers and a constructor. - Improved :doc:`bugprone-unchecked-optional-access ` to support `bsl::optional` and `bdlb::NullableValue` from _. - Improved :doc:`bugprone-unsafe-functions ` check to allow specifying additional functions to match. - Improved :doc:`bugprone-use-after-move ` to avoid triggering on ``reset()`` calls on moved-from ``std::optional`` and ``std::any`` objects, similarly to smart pointers. - Improved :doc:`cert-flp30-c ` check to fix false positive that floating point variable is only used in increment expression. - Improved :doc:`cppcoreguidelines-avoid-const-or-ref-data-members ` check to avoid false positives when detecting a templated class with inheritance. - Improved :doc:`cppcoreguidelines-init-variables ` check by fixing the insertion location for function pointers. - Improved :doc:`cppcoreguidelines-prefer-member-initializer ` check to avoid false positive when member initialization depends on a structured binding variable. - Fixed :doc:`cppcoreguidelines-pro-type-union-access ` check to report a location even when the member location is not valid. - Improved :doc:`misc-definitions-in-headers ` check by rewording the diagnostic note that suggests adding ``inline``. - Improved :doc:`misc-redundant-expression ` check by extending the checker to detect floating point and integer literals in redundant expressions. - Improved :doc:`misc-unconventional-assign-operator ` check to avoid false positive for C++23 deducing this. - Improved :doc:`misc-use-internal-linkage ` check to insert ``static`` keyword before type qualifiers such as ``const`` and ``volatile`` and fix false positives for function declaration without body and fix false positives for C++20 export declarations and fix false positives for global scoped overloaded ``operator new`` and ``operator delete``. - Improved :doc:`modernize-avoid-c-arrays ` check to suggest using ``std::span`` as a replacement for parameters of incomplete C array type in C++20 and ``std::array`` or ``std::vector`` before C++20. - Improved :doc:`modernize-loop-convert ` check to fix false positive when using loop variable in initializer of lambda capture. - Improved :doc:`modernize-min-max-use-initializer-list ` check by fixing a false positive when only an implicit conversion happened inside an initializer list. - Improved :doc:`modernize-use-designated-initializers ` check to fix a crash when a class is declared but not defined. - Improved :doc:`modernize-use-nullptr ` check to also recognize ``NULL``/``__null`` (but not ``0``) when used with a templated type. - Improved :doc:`modernize-use-starts-ends-with ` check to handle two new cases from ``rfind`` and ``compare`` to ``ends_with``, and one new case from ``substr`` to ``starts_with``, and a small adjustment to the diagnostic message. - Improved :doc:`modernize-use-std-format ` check to support replacing member function calls too and to only expand macros starting with ``PRI`` and ``__PRI`` from ```` in the format string. - Improved :doc:`modernize-use-std-print ` check to support replacing member function calls too and to only expand macros starting with ``PRI`` and ``__PRI`` from ```` in the format string. - Improved :doc:`performance-avoid-endl ` check to use ``std::endl`` as placeholder when lexer cannot get source text. - Improved :doc:`performance-move-const-arg ` check to fix a crash when an argument type is declared but not defined. - Improved :doc:`readability-container-contains ` check to let it work on any class that has a ``contains`` method. Fix some false negatives in the ``find()`` case. - Improved :doc:`readability-enum-initial-value ` check by only issuing diagnostics for the definition of an ``enum``, by not emitting a redundant file path for anonymous enums in the diagnostic, and by fixing a typo in the diagnostic. - Improved :doc:`readability-implicit-bool-conversion ` check by adding the option `UseUpperCaseLiteralSuffix` to select the case of the literal suffix in fixes and fixing false positive for implicit conversion of comparison result in C23. - Improved :doc:`readability-redundant-smartptr-get ` check to remove `->`, when redundant `get()` is removed. - Improved :doc:`readability-identifier-naming ` check to validate ``namespace`` aliases. Removed checks ^^^^^^^^^^^^^^ Miscellaneous ^^^^^^^^^^^^^ Improvements to include-fixer ----------------------------- The improvements are... Improvements to clang-include-fixer ----------------------------------- The improvements are... Improvements to modularize -------------------------- The improvements are... Improvements to pp-trace ------------------------ Clang-tidy Visual Studio plugin -------------------------------