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Objective-C¶

Miscellaneous¶

New checks¶

• New bugprone-multiple-new-in-one-expression check.

  Finds multiple new operator calls in a single expression, where the allocated memory by the first new may leak if the second allocation fails and throws exception.

• New bugprone-non-zero-enum-to-bool-conversion check.

  Detect implicit and explicit casts of enum type into bool where enum type doesn’t have a zero-value enumerator.

• New bugprone-unique-ptr-array-mismatch check.

  Finds initializations of C++ unique pointers to non-array type that are initialized with an array.

• New bugprone-unsafe-functions check.

  Checks for functions that have safer, more secure replacements available, or are considered deprecated due to design flaws. This check relies heavily on, but is not exclusive to, the functions from the Annex K. “Bounds-checking interfaces” of C11.

• New cppcoreguidelines-avoid-capturing-lambda-coroutines check.

  Flags C++20 coroutine lambdas with non-empty capture lists that may cause use-after-free errors and suggests avoiding captures or ensuring the lambda closure object has a guaranteed lifetime.

• New cppcoreguidelines-misleading-capture-default-by-value check.

  Warns when lambda specify a by-value capture default and capture this.

• New cppcoreguidelines-missing-std-forward check.

  Warns when a forwarding reference parameter is not forwarded within the function body.

• New cppcoreguidelines-rvalue-reference-param-not-moved check.

  Warns when an rvalue reference function parameter is never moved within the function body.

• New llvmlibc-inline-function-decl check.

  Checks that all implicit and explicit inline functions in header files are tagged with the LIBC_INLINE macro.

• New misc-include-cleaner check.

  Checks for unused and missing includes.

• New modernize-type-traits check.

  Converts standard library type traits of the form traits<...>::type and traits<...>::value into traits_t<...> and traits_v<...> respectively.

• New performance-avoid-endl check.

  Finds uses of std::endl on streams and replaces them with '\n'.

• New readability-avoid-unconditional-preprocessor-if check.

  Finds code blocks that are constantly enabled or disabled in preprocessor directives by analyzing #if conditions, such as #if 0 and #if 1, etc.

• New readability-operators-representation check.

  Enforces consistent token representation for invoked binary, unary and overloaded operators in C++ code.

New check aliases¶

• New alias cert-msc24-c to bugprone-unsafe-functions was added.
• New alias cert-msc33-c to bugprone-unsafe-functions was added.
• New alias cppcoreguidelines-use-default-member-init to modernize-use-default-member-init was added.

Changes in existing checks¶

• Fixed false-positives in bugprone-branch-clone check by ignoring auto-generated code, template instances, implicit code patterns and duplicated switch cases marked with the [[fallthrough]] attribute.
• Improved readability-redundant-string-cstr check to recognise unnecessary std::string::c_str() and std::string::data() calls in arguments to std::print, std::format or other functions listed in the StringParameterFunction check option.
• Improved bugprone-dangling-handle check enhancing detection of handles behind type aliases.
• Deprecated check-local options HeaderFileExtensions in bugprone-dynamic-static-initializers check. Global options of the same name should be used instead.
• Improved bugprone-exception-escape to not emit warnings for forward declarations of functions.
• Improved bugprone-fold-init-type to handle iterators that do not define value_type type aliases.
• Improved bugprone-incorrect-roundings check by adding support for other floating point representations in float constant like 0.5L.
• Deprecated check-local options HeaderFileExtensions and ImplementationFileExtensions in bugprone-suspicious-include check. Global options of the same name should be used instead.
• Improved bugprone-unchecked-optional-access check to properly handle calls to std::forward.
• Improved bugprone-use-after-move check. Detect uses and moves in constructor initializers. Correctly handle constructor arguments as being sequenced when constructor call is written as list-initialization.
• Extend bugprone-unused-return-value check to check for all functions with specified return types using the CheckedReturnTypes option.
• Deprecated cert-dcl21-cpp check.
• Deprecated C.48 enforcement from cppcoreguidelines-prefer-member-initializer. Please use cppcoreguidelines-use-default-member-init instead.
• Deprecated check-local options HeaderFileExtensions in google-build-namespaces check. Global options of the same name should be used instead.
• Deprecated check-local options HeaderFileExtensions in google-global-names-in-headers check. Global options of the same name should be used instead.
• Deprecated check-local options HeaderFileExtensions in llvm-header-guard check. Global options of the same name should be used instead.
• Deprecated check-local options HeaderFileExtensions in misc-definitions-in-headers check. Global options of the same name should be used instead.
• Fixed false positive in misc-definitions-in-headers to avoid warning on declarations inside anonymous namespaces.
• Improved misc-unused-parameters check with new IgnoreVirtual option to optionally ignore virtual methods.
• Deprecated check-local options HeaderFileExtensions in misc-unused-using-decls check. Global options of the same name should be used instead.
• In modernize-use-default-member-init count template constructors toward hand written constructors so that they are skipped if more than one exists.
• Fixed false positive in modernize-use-equals-default check for special member functions containing macros or preprocessor directives, and out-of-line special member functions in unions.
• Improved modernize-use-override check with new IgnoreTemplateInstantiations option to optionally ignore virtual function overrides that are part of template instantiations.
• Fixed reading HungarianNotation.CString.* options in readability-identifier-naming check.
• Renamed HungarianNotation.CString options CharPrinter and WideCharPrinter to CharPointer and WideCharPointer respectively in readability-identifier-naming check.
• Updated the Hungarian prefixes for enums in C files to match those used in C++ files for improved readability, as checked by readability-identifier-naming. To preserve the previous behavior of using i as the prefix for enum tags, set the EnumConstantPrefix option to i instead of using EnumConstantHungarianPrefix.
• Fixed a hungarian notation issue in readability-identifier-naming which failed to indicate the number of asterisks.
• Fixed a false positive in readability-implicit-bool-conversion check warning would be unnecessarily emitted for explicit cast using direct list initialization.
• Added support to optionally ignore user-defined literals in readability-magic-numbers.
• Fixed a false positive in readability-container-size-empty check when comparing std::array objects to default constructed ones. The behavior for this and other relevant classes can now be configured with a new option.
• Improved bugprone-too-small-loop-variable check. Basic support for bit-field and integer members as a loop variable or upper limit were added.
• Improved readability-magic-numbers check, now allows for magic numbers in type aliases such as using and typedef declarations if the new IgnoreTypeAliases option is set to true.
• Fixed a false positive in readability-misleading-indentation check when warning would be unnecessarily emitted for template dependent if constexpr.
• Fixed incorrect fixes in readability-redundant-declaration check when linkage (like extern "C") is explicitly specified.
• Improved readability-static-accessed-through-instance check to support unscoped enumerations through instances and fixed usage of anonymous structs or classes.
• Fixed a false positive in cppcoreguidelines-slicing check when warning would be emitted in constructor for virtual base class initialization.
• Improved bugprone-use-after-move to understand that there is a sequence point between designated initializers.
• Fixed an issue in the performance-noexcept-move-constructor checker that was causing false-positives when the move constructor or move assign operator were defaulted.
• Fixed an issue in readability-identifier-naming when specifying an empty string for Prefix or Suffix options could result in the style not being used.
• Fixed an issue in google-readability-avoid-underscore-in-googletest-name when using DISABLED_ in the test suite name.
• Improved modernize-concat-nested-namespaces to fix incorrect fixes when using macro between namespace declarations, to fix false positive when using namespace with attributes and to support nested inline namespace introduced in c++20.
• Fixed a false positive in performance-no-automatic-move when warning would be emitted for a const local variable to which NRVO is applied.
• Improved performance-no-automatic-move: warn on const && constructors.
• Fixed bugprone-exception-escape for coroutines where previously a warning would be emitted with coroutines throwing exceptions in their bodies.

Removed checks¶