cppcheck/clang-tidy.md

5.0 KiB

clang-tidy

Below are the reasoning why certain checks are (currently) disabled for out code base

Externals

We do not perform static analysis of the source of the external libraries. simplecpp has its own CI with a clang-tidy workflow.

Disabled Checks

abseil-*
altera-*
android-*
boost-*
darwin-*
fuchsia-*
linuxkernel-*
llvm-*
llvmlibc-*
mpi-*
objc-*
openmp-*
zircon-*

These are disabled since the platforms/libraries in question are not targeted by us.

cert-*
cppcoreguidelines-*
google-*
hicpp-*

These are coding guidelines we do not follow. Some of the checks might be explicitly enabled though.

readability-braces-around-statements
readability-isolate-declaration
modernize-use-trailing-return-type
modernize-use-auto
readability-uppercase-literal-suffix
readability-else-after-return
modernize-use-default-member-init
readability-identifier-length

These do not relect the style we are (currently) enforcing.

readability-function-size
readability-function-cognitive-complexity

We are not interesting in the size/complexity of a function.

readability-magic-numbers
readability-redundant-member-init
readability-simplify-boolean-expr

These do not (always) increase readability.

bugprone-macro-parentheses
readability-implicit-bool-conversion

To be documented.

performance-faster-string-find
bugprone-narrowing-conversions
performance-no-automatic-move

It was decided not to apply these.

modernize-use-equals-default
modernize-loop-convert

These might change the behavior of code which might not be intended (need to file an upstream issue)

modernize-raw-string-literal

This leads to a mismatch of raw string literals and regular ones and does reduce the readability.

readability-convert-member-functions-to-static

Disabled because of false positives with Qt slot methods (see https://github.com/llvm/llvm-project/issues/57520).

-clang-analyzer-*

Disable because of false positives (needs to file an upstream bug report).

misc-non-private-member-variables-in-classes

We actively use this.

misc-no-recursion

Leads to lots of "false positives". This seem to enforce a coding guidelines of certain codebases.

readability-use-anyofallof

We currently don't even apply our own useStlAlgorithm findings.

bugprone-easily-swappable-parameters

This produces a lot of noise and they are not fixable that easily.

readability-container-data-pointer

Disable because of false positives and inconsistent warnings (need to file an upstream bug report).

misc-const-correctness

Work in progress.

bugprone-assignment-in-if-condition

Is reported for valid patterns we are using.

readability-suspicious-call-argument

Produces a lot of false positives since it is too vague in its analysis.

performance-inefficient-string-concatenation

Produces many warnings which very much look like false positives (needs to be reported upstream).

bugprone-suspicious-include

Causes warnings with *.cpp includes in Qt generated files.

modernize-avoid-c-arrays
readability-container-size-empty
bugprone-branch-clone
readability-const-return-type
modernize-return-braced-init-list
misc-throw-by-value-catch-by-reference
readability-avoid-const-params-in-decls
bugprone-signed-char-misuse
readability-redundant-access-specifiers
performance-noexcept-move-constructor
concurrency-mt-unsafe

To be evaluated.

portability-std-allocator-const

Only necessary for code which is exclusively compiled with libc++. Also disabled for performance reasons - see https://github.com/llvm/llvm-project/issues/57527#issuecomment-1237935132.

modernize-deprecated-ios-base-aliases

Warns about aliases which are removed in C++20. Also disabled for performance reasons - see https://github.com/llvm/llvm-project/issues/57527#issuecomment-1237935132.

bugprone-unchecked-optional-access

We are not using any optional implementation. Also disabled for performance reasons - see https://github.com/llvm/llvm-project/issues/57527#issuecomment-1237935132.

modernize-replace-auto-ptr

Still available until C++17. It is unlikely such code will ever be introduced. Also disabled for performance reasons - see https://github.com/llvm/llvm-project/issues/57527#issuecomment-1237935132.

readability-identifier-naming

We are currently using our own naming.json to enforce naming schemes. Also disabled for performance reasons - see https://github.com/llvm/llvm-project/issues/57527#issuecomment-1237935132.

portability-simd-intrinsics

We are not using SIMD instructions and it suggests to use std::experiemental:: features which might not be commonly available. Also disabled for performance reasons - see https://github.com/llvm/llvm-project/issues/57527#issuecomment-1237935132.