Inlay hints¶

Diagnostics¶

• Improved Fix-its of some clang-tidy checks when applied with clangd.

Semantic Highlighting¶

Compile flags¶

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Code completion¶

Signature help¶

Cross-references¶

Objective-C¶

Miscellaneous¶

New checks¶

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

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

• New bugprone-unchecked-optional-access check.

  Warns when the code is unwrapping a std::optional<T>, absl::optional<T>, or base::Optional<T> object without assuring that it contains a value.

• New misc-confusable-identifiers check.

  Detects confusable Unicode identifiers.

• New modernize-macro-to-enum check.

  Replaces groups of adjacent macros with an unscoped anonymous enum.

• New portability-std-allocator-const check.

  Report use of std::vector<const T> (and similar containers of const elements). These are not allowed in standard C++ due to undefined std::allocator<const T>. They do not compile with libstdc++ or MSVC. Future libc++ will remove the extension (D120996 <https://reviews.llvm.org/D120996>).

New check aliases¶

• New alias cppcoreguidelines-macro-to-enum to modernize-macro-to-enum was added.

Changes in existing checks¶

• Fixed nonsensical suggestion of altera-struct-pack-align check for empty structs.

• Fixed some false positives in bugprone-infinite-loop involving dependent expressions.

• Fixed a crash in bugprone-sizeof-expression when sizeof(…) is compared against a __int128_t.

• Fixed bugs in bugprone-use-after-move:

  • Treat a move in a lambda capture as happening in the function that defines the lambda, not within the body of the lambda (as we were previously doing erroneously).
  • Don’t emit an erroneous warning on self-moves.

• Made cert-oop57-cpp more sensitive by checking for an arbitrary expression in the second argument of memset.

• Improved cppcoreguidelines-prefer-member-initializer check.

  Fixed an issue when there was already an initializer in the constructor and the check would try to create another initializer for the same member.

• Fixed a false positive in cppcoreguidelines-virtual-class-destructor involving final classes. The check will not diagnose classes marked final, since those cannot be used as base classes, consequently, they can not violate the rule.

• Fixed a crash in llvmlibc-callee-namespace when executing for C++ code that contain calls to advanced constructs, e.g. overloaded operators.

• Fixed false positives in misc-redundant-expression:

  • Fixed a false positive involving overloaded comparison operators.
  • Fixed a false positive involving assignments in conditions. This fixes Issue 35853.

• Fixed a false positive in misc-unused-parameters where invalid parameters were implicitly being treated as being unused. This fixes Issue 56152.

• Fixed a false positive in modernize-deprecated-headers involving including C header files from C++ files wrapped by extern "C" { ... } blocks. Such includes will be ignored by now. By default now it doesn’t warn for including deprecated headers from header files, since that header file might be used from C source files. By passing the CheckHeaderFile=true option if header files of the project only included by C++ source files.

• Improved performance-inefficient-vector-operation to work when the vector is a member of a structure.

• Fixed a crash in performance-unnecessary-value-param when the specialization template has an unnecessary value parameter. Removed the fix for a template.

• Fixed a crash in readability-const-return-type when a pure virtual function overrided has a const return type. Removed the fix for a virtual function.

• Fixed incorrect suggestions for readability-container-size-empty when smart pointers are involved.

• Fixed a false positive in readability-non-const-parameter when the parameter is referenced by an lvalue.

• Expanded readability-simplify-boolean-expr to simplify expressions using DeMorgan’s Theorem.

Removed checks¶