ClickHouse/.clang-tidy

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# To run clang-tidy from CMake, build ClickHouse with -DENABLE_CLANG_TIDY=1. To show all warnings, it is
# recommended to pass "-k0" to Ninja.
# Enable all checks + disable selected checks. Feel free to remove disabled checks from below list if
# a) the new check is not controversial (this includes many checks in readability-* and google-*) or
# b) too noisy (checks with > 100 new warnings are considered noisy, this includes e.g. cppcoreguidelines-*).
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HeaderFilterRegex: '^.*/(base|src|programs|utils)/.*(h|hpp)$'
Checks: [
'*',
'-abseil-*',
'-altera-*',
'-android-*',
'-bugprone-assignment-in-if-condition',
'-bugprone-branch-clone',
'-bugprone-easily-swappable-parameters',
'-bugprone-exception-escape',
'-bugprone-forward-declaration-namespace',
'-bugprone-implicit-widening-of-multiplication-result',
'-bugprone-narrowing-conversions',
'-bugprone-not-null-terminated-result',
'-bugprone-reserved-identifier', # useful but too slow, TODO retry when https://reviews.llvm.org/rG1c282052624f9d0bd273bde0b47b30c96699c6c7 is merged
'-bugprone-unchecked-optional-access',
'-cert-dcl16-c',
'-cert-dcl37-c',
'-cert-dcl51-cpp',
'-cert-err58-cpp',
'-cert-msc32-c',
'-cert-msc51-cpp',
'-cert-oop54-cpp',
'-cert-oop57-cpp',
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'-clang-analyzer-optin.performance.Padding',
'-clang-analyzer-unix.Malloc',
'-cppcoreguidelines-*', # impractical in a codebase as large as ClickHouse, also slow
'-darwin-*',
'-fuchsia-*',
'-google-build-using-namespace',
'-google-readability-braces-around-statements',
'-google-readability-casting',
'-google-readability-function-size',
'-google-readability-namespace-comments',
'-google-readability-todo',
'-hicpp-avoid-c-arrays',
'-hicpp-avoid-goto',
'-hicpp-braces-around-statements',
'-hicpp-explicit-conversions',
'-hicpp-function-size',
'-hicpp-member-init',
'-hicpp-move-const-arg',
'-hicpp-multiway-paths-covered',
'-hicpp-named-parameter',
'-hicpp-no-array-decay',
'-hicpp-no-assembler',
'-hicpp-no-malloc',
'-hicpp-signed-bitwise',
'-hicpp-special-member-functions',
'-hicpp-uppercase-literal-suffix',
'-hicpp-use-auto',
'-hicpp-use-emplace',
'-hicpp-vararg',
'-linuxkernel-*',
'-llvm-*',
'-llvmlibc-*',
'-openmp-*',
'-misc-const-correctness',
'-misc-include-cleaner', # useful but far too many occurrences
'-misc-no-recursion',
'-misc-non-private-member-variables-in-classes',
'-misc-confusable-identifiers', # useful but slooo
'-misc-use-anonymous-namespace',
'-modernize-avoid-c-arrays',
'-modernize-concat-nested-namespaces',
'-modernize-macro-to-enum',
'-modernize-pass-by-value',
'-modernize-return-braced-init-list',
'-modernize-use-auto',
'-modernize-use-default-member-init',
'-modernize-use-emplace',
'-modernize-use-nodiscard',
'-modernize-use-override',
'-modernize-use-trailing-return-type',
'-performance-inefficient-string-concatenation',
'-performance-no-int-to-ptr',
'-performance-avoid-endl',
'-performance-unnecessary-value-param',
'-portability-simd-intrinsics',
'-readability-avoid-unconditional-preprocessor-if',
'-readability-braces-around-statements',
'-readability-convert-member-functions-to-static',
'-readability-else-after-return',
'-readability-function-cognitive-complexity',
'-readability-function-size',
'-readability-identifier-length',
'-readability-identifier-naming', # useful but too slow
'-readability-implicit-bool-conversion',
'-readability-isolate-declaration',
'-readability-magic-numbers',
'-readability-named-parameter',
'-readability-redundant-declaration',
'-readability-simplify-boolean-expr',
'-readability-static-accessed-through-instance',
'-readability-suspicious-call-argument',
'-readability-uppercase-literal-suffix',
'-readability-use-anyofallof',
'-zircon-*'
]
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WarningsAsErrors: '*'
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ExtraArgs:
# clang-tidy 17 started to complain (for unknown reasons) that various pragmas are unknown ("clang-diagnostic-unknown-pragmas").
# This is technically a compiler error, not a clang-tidy error. We could litter the code base with more pragmas that suppress
# this error but it is better to pass the following flag to the compiler:
- '-Wno-unknown-pragmas'
- '-Wno-unused-command-line-argument' # similar issue
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CheckOptions:
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readability-identifier-naming.ClassCase: CamelCase
readability-identifier-naming.EnumCase: CamelCase
readability-identifier-naming.LocalVariableCase: lower_case
readability-identifier-naming.StaticConstantCase: aNy_CasE
readability-identifier-naming.MemberCase: lower_case
readability-identifier-naming.PrivateMemberPrefix: ''
readability-identifier-naming.ProtectedMemberPrefix: ''
readability-identifier-naming.PublicMemberCase: lower_case
readability-identifier-naming.MethodCase: camelBack
readability-identifier-naming.PrivateMethodPrefix: ''
readability-identifier-naming.ProtectedMethodPrefix: ''
readability-identifier-naming.ParameterPackCase: lower_case
readability-identifier-naming.StructCase: CamelCase
readability-identifier-naming.TemplateTemplateParameterCase: CamelCase
readability-identifier-naming.TemplateParameterCase: lower_case
readability-identifier-naming.TypeTemplateParameterCase: CamelCase
readability-identifier-naming.TypedefCase: CamelCase
readability-identifier-naming.UnionCase: CamelCase
modernize-loop-convert.UseCxx20ReverseRanges: false
performance-move-const-arg.CheckTriviallyCopyableMove: false
# Workaround clang-tidy bug: https://github.com/llvm/llvm-project/issues/46097
readability-identifier-naming.TypeTemplateParameterIgnoredRegexp: expr-type
cppcoreguidelines-avoid-do-while.IgnoreMacros: true