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‎.clang-format

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BasedOnStyle: WebKit
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Language: Cpp
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AlignAfterOpenBracket: AlwaysBreak
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BreakBeforeBraces: Custom
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BraceWrapping:
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AfterClass: true
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AfterControlStatement: true
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AfterEnum: true
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AfterFunction: true
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AfterNamespace: true
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AfterStruct: true
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AfterUnion: true
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BeforeCatch: true
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BeforeElse: true
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BeforeLambdaBody: true
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IndentBraces: false
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BreakConstructorInitializersBeforeComma: false
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Cpp11BracedListStyle: true
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ColumnLimit: 140
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ConstructorInitializerAllOnOneLineOrOnePerLine: true
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ExperimentalAutoDetectBinPacking: true
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UseTab: Never
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TabWidth: 4
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Standard: Cpp11
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PointerAlignment: Middle
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MaxEmptyLinesToKeep: 2
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KeepEmptyLinesAtTheStartOfBlocks: false
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AllowShortFunctionsOnASingleLine: InlineOnly
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AlwaysBreakTemplateDeclarations: true
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IndentCaseLabels: true
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SpaceAfterTemplateKeyword: true
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SpaceBeforeCpp11BracedList: false
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SortIncludes: true
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IndentPPDirectives: AfterHash
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IncludeCategories:
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- Regex: '^<[a-z_]+>'
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Priority: 1
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- Regex: '^<[a-z_]+.h>'
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Priority: 2
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- Regex: '^["<](common|ext|mysqlxx|daemon|zkutil)/'
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Priority: 90
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- Regex: '^["<](DB)/'
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Priority: 100
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- Regex: '^["<](Poco)/'
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Priority: 50
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- Regex: '^"'
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Priority: 110
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- Regex: '/'
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Priority: 30
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- Regex: '.*'
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Priority: 40
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ReflowComments: false
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AlignEscapedNewlinesLeft: false
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AlignEscapedNewlines: DontAlign
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AlignTrailingComments: false
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# Not changed:
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AccessModifierOffset: -4
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AlignConsecutiveAssignments: false
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AlignOperands: false
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AllowAllParametersOfDeclarationOnNextLine: true
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AllowShortBlocksOnASingleLine: false
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AllowShortCaseLabelsOnASingleLine: false
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AllowShortIfStatementsOnASingleLine: false
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AllowShortLoopsOnASingleLine: false
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AlwaysBreakAfterDefinitionReturnType: None
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AlwaysBreakBeforeMultilineStrings: false
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BinPackArguments: false
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BinPackParameters: false
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BreakBeforeBinaryOperators: All
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BreakBeforeTernaryOperators: true
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CommentPragmas: '^ IWYU pragma:'
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ConstructorInitializerIndentWidth: 4
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ContinuationIndentWidth: 4
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DerivePointerAlignment: false
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DisableFormat: false
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IndentRequiresClause: false
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IndentWidth: 4
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IndentWrappedFunctionNames: false
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MacroBlockBegin: ''
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MacroBlockEnd: ''
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NamespaceIndentation: None
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ObjCBlockIndentWidth: 4
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ObjCSpaceAfterProperty: true
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ObjCSpaceBeforeProtocolList: true
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PenaltyBreakBeforeFirstCallParameter: 19
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PenaltyBreakComment: 300
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PenaltyBreakFirstLessLess: 120
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PenaltyBreakString: 1000
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PenaltyExcessCharacter: 1000000
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PenaltyReturnTypeOnItsOwnLine: 60
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RemoveBracesLLVM: true
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SpaceAfterCStyleCast: false
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SpaceBeforeAssignmentOperators: true
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SpaceBeforeParens: ControlStatements
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SpaceInEmptyParentheses: false
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SpacesBeforeTrailingComments: 1
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SpacesInContainerLiterals: true
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SpacesInCStyleCastParentheses: false
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SpacesInParentheses: false
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SpacesInSquareBrackets: false

‎.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
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# recommended to pass "-k0" to Ninja.
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# Enable all checks + disable selected checks. Feel free to remove disabled checks from below list if
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# a) the new check is not controversial (this includes many checks in readability-* and google-*) or
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# b) too noisy (checks with > 100 new warnings are considered noisy, this includes e.g. cppcoreguidelines-*).
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# TODO: Once clang(-tidy) 17 is the minimum, we can convert this list to YAML
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# See https://releases.llvm.org/17.0.1/tools/clang/tools/extra/docs/ReleaseNotes.html#improvements-to-clang-tidy
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# TODO Let clang-tidy check headers in further directories
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# --> HeaderFilterRegex: '^.*/(src|base|programs|utils)/.*(h|hpp)$'
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HeaderFilterRegex: '^.*/(base)/.*(h|hpp)$'
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Checks: '*,
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-abseil-*,
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-altera-*,
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-android-*,
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-bugprone-assignment-in-if-condition,
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-bugprone-branch-clone,
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-bugprone-easily-swappable-parameters,
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-bugprone-exception-escape,
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-bugprone-implicit-widening-of-multiplication-result,
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-bugprone-narrowing-conversions,
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-bugprone-not-null-terminated-result,
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-bugprone-reserved-identifier, # useful but too slow, TODO retry when https://reviews.llvm.org/rG1c282052624f9d0bd273bde0b47b30c96699c6c7 is merged
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-bugprone-unchecked-optional-access,
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-cert-dcl16-c,
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-cert-dcl37-c,
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-cert-dcl51-cpp,
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-cert-err58-cpp,
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-cert-msc32-c,
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-cert-msc51-cpp,
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-cert-oop54-cpp,
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-cert-oop57-cpp,
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-clang-analyzer-unix.Malloc,
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-cppcoreguidelines-*, # impractical in a codebase as large as ClickHouse, also slow
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-darwin-*,
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-fuchsia-*,
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-google-build-using-namespace,
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-google-readability-braces-around-statements,
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-google-readability-casting,
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-google-readability-function-size,
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-google-readability-namespace-comments,
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-google-readability-todo,
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-hicpp-avoid-c-arrays,
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-hicpp-avoid-goto,
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-hicpp-braces-around-statements,
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-hicpp-explicit-conversions,
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-hicpp-function-size,
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-hicpp-member-init,
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-hicpp-move-const-arg,
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-hicpp-multiway-paths-covered,
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-hicpp-named-parameter,
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-hicpp-no-array-decay,
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-hicpp-no-assembler,
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-hicpp-no-malloc,
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-hicpp-signed-bitwise,
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-hicpp-special-member-functions,
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-hicpp-uppercase-literal-suffix,
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-hicpp-use-auto,
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-hicpp-use-emplace,
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-hicpp-vararg,
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-linuxkernel-*,
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-llvm-*,
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-llvmlibc-*,
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-openmp-*,
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-misc-const-correctness,
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-misc-include-cleaner, # useful but far too many occurrences
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-misc-no-recursion,
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-misc-non-private-member-variables-in-classes,
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-misc-confusable-identifiers, # useful but slooow
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-misc-use-anonymous-namespace,
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-modernize-avoid-c-arrays,
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-modernize-concat-nested-namespaces,
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-modernize-macro-to-enum,
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-modernize-pass-by-value,
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-modernize-return-braced-init-list,
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-modernize-use-auto,
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-modernize-use-default-member-init,
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-modernize-use-emplace,
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-modernize-use-nodiscard,
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-modernize-use-override,
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-modernize-use-trailing-return-type,
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-performance-inefficient-string-concatenation,
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-performance-no-int-to-ptr,
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-performance-avoid-endl,
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-performance-unnecessary-value-param,
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-portability-simd-intrinsics,
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-readability-avoid-unconditional-preprocessor-if,
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-readability-braces-around-statements,
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-readability-convert-member-functions-to-static,
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-readability-else-after-return,
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-readability-function-cognitive-complexity,
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-readability-function-size,
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-readability-identifier-length,
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-readability-identifier-naming, # useful but too slow
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-readability-implicit-bool-conversion,
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-readability-isolate-declaration,
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-readability-magic-numbers,
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-readability-named-parameter,
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-readability-redundant-declaration,
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-readability-simplify-boolean-expr,
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-readability-static-accessed-through-instance,
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-readability-suspicious-call-argument,
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-readability-uppercase-literal-suffix,
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-readability-use-anyofallof,
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-zircon-*,
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'
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WarningsAsErrors: '*'
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ExtraArgs:
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# clang-tidy 17 started to complain (for unknown reasons) that various pragmas are unknown ("clang-diagnostic-unknown-pragmas").
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# This is technically a compiler error, not a clang-tidy error. We could litter the code base with more pragmas that suppress
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# this error but it is better to pass the following flag to the compiler:
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- '-Wno-unknown-pragmas'
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- '-Wno-unused-command-line-argument' # similar issue
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CheckOptions:
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readability-identifier-naming.ClassCase: CamelCase
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readability-identifier-naming.EnumCase: CamelCase
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readability-identifier-naming.LocalVariableCase: lower_case
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readability-identifier-naming.StaticConstantCase: aNy_CasE
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readability-identifier-naming.MemberCase: lower_case
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readability-identifier-naming.PrivateMemberPrefix: ''
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readability-identifier-naming.ProtectedMemberPrefix: ''
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readability-identifier-naming.PublicMemberCase: lower_case
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readability-identifier-naming.MethodCase: camelBack
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readability-identifier-naming.PrivateMethodPrefix: ''
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readability-identifier-naming.ProtectedMethodPrefix: ''
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readability-identifier-naming.ParameterPackCase: lower_case
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readability-identifier-naming.StructCase: CamelCase
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readability-identifier-naming.TemplateTemplateParameterCase: CamelCase
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readability-identifier-naming.TemplateParameterCase: lower_case
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readability-identifier-naming.TypeTemplateParameterCase: CamelCase
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readability-identifier-naming.TypedefCase: CamelCase
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readability-identifier-naming.UnionCase: CamelCase
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modernize-loop-convert.UseCxx20ReverseRanges: false
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performance-move-const-arg.CheckTriviallyCopyableMove: false
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# Workaround clang-tidy bug: https://github.com/llvm/llvm-project/issues/46097
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readability-identifier-naming.TypeTemplateParameterIgnoredRegexp: expr-type
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cppcoreguidelines-avoid-do-while.IgnoreMacros: true

‎.clangd

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Diagnostics:
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# clangd does parse .clang-tidy, but some checks are too slow to run in
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# clang-tidy build, so let's enable them explicitly for clangd at least.
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ClangTidy:
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# The following checks had been disabled due to slowliness with C++23,
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# for more details see [1].
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#
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# [1]: https://github.com/llvm/llvm-project/issues/61418
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#
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# But the code base had been written in a style that had been checked
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# by this check, so at least, let's enable it for clangd.
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Add: [
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# configured in .clang-tidy
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readability-identifier-naming,
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bugprone-reserved-identifier,
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]

‎.editorconfig

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root = true
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# Unix-style newlines with a newline ending every file
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[*]
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end_of_line = lf
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insert_final_newline = true
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# Matches multiple files with brace expansion notation
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# Set default charset
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[*.{c,cpp,cxx,h,hpp,hxx,py,cmake}]
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charset = utf-8
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indent_style = space
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indent_size = 4
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trim_trailing_whitespace = true
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[CMakeLists.txt]
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charset = utf-8
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indent_style = space
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indent_size = 4
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trim_trailing_whitespace = true

‎.exrc

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au BufRead,BufNewFile * set tabstop=4 softtabstop=0 expandtab shiftwidth=4 smarttab tags=tags,../tags

‎.git-blame-ignore-revs

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# This is a file that can be used by git-blame to ignore some revisions.
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# (git 2.23+, released in August 2019)
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#
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# Can be configured as follow:
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#
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# $ git config blame.ignoreRevsFile .git-blame-ignore-revs
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#
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# For more information you can look at git-blame(1) man page.
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# Changed tabs to spaces in code [#CLICKHOUSE-3]
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137ad95929ee016cc6d3c03bccb5586941c163ff
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# dbms/ → src/
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# (though it is unlikely that you will see it in blame)
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06446b4f08a142d6f1bc30664c47ded88ab51782

‎.gitattributes

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contrib/* linguist-vendored
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*.h linguist-language=C++
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tests/queries/0_stateless/data_json/* binary
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tests/queries/0_stateless/*.reference -crlf

‎.github/CODEOWNERS

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‎.github/ISSUE_TEMPLATE/10_question.md

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---
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name: Question
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about: Ask a question about ClickHouse
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title: ''
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labels: question
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assignees: ''
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---
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> Make sure to check documentation https://clickhouse.com/docs/en/ first. If the question is concise and probably has a short answer, asking it in [community Slack](https://join.slack.com/t/clickhousedb/shared_invite/zt-1gh9ds7f4-PgDhJAaF8ad5RbWBAAjzFg) is probably the fastest way to find the answer. For more complicated questions, consider asking them on StackOverflow with "clickhouse" tag https://stackoverflow.com/questions/tagged/clickhouse
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> If you still prefer GitHub issues, remove all this text and ask your question here.

‎.github/ISSUE_TEMPLATE/20_feature-request.md

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---
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name: Feature request
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about: Suggest an idea for ClickHouse
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title: ''
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labels: feature
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assignees: ''
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---
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> (you don't have to strictly follow this form)
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**Use case**
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> A clear and concise description of what is the intended usage scenario is.
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**Describe the solution you'd like**
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> A clear and concise description of what you want to happen.
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**Describe alternatives you've considered**
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> A clear and concise description of any alternative solutions or features you've considered.
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**Additional context**
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> Add any other context or screenshots about the feature request here.

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