diff --git a/.clang-format b/.clang-format
new file mode 100644
index 0000000000000000000000000000000000000000..69953ddf58a9a7c6b3f2eb660d0d357573429169
--- /dev/null
+++ b/.clang-format
@@ -0,0 +1,195 @@
+---
+# Reference: https://clang.llvm.org/docs/ClangFormatStyleOptions.html
+Language: Cpp
+BasedOnStyle: LLVM
+AccessModifierOffset: -4
+AlignAfterOpenBracket: Align
+AlignArrayOfStructures: None
+AlignConsecutiveAssignments: None
+AlignConsecutiveBitFields: AcrossEmptyLines
+AlignConsecutiveDeclarations: None
+AlignConsecutiveMacros: Consecutive
+AlignEscapedNewlines: Right
+AlignOperands: Align
+AlignTrailingComments:
+  Kind: Always
+  OverEmptyLines: 1
+AllowAllArgumentsOnNextLine: false
+AllowAllParametersOfDeclarationOnNextLine: false
+AllowBreakBeforeNoexceptSpecifier: OnlyWithParen
+AllowShortBlocksOnASingleLine: Never
+AllowShortCaseExpressionOnASingleLine: true
+AllowShortCaseLabelsOnASingleLine: false
+AllowShortCompoundRequirementOnASingleLine: true
+AllowShortEnumsOnASingleLine: true
+AllowShortFunctionsOnASingleLine: All
+AllowShortIfStatementsOnASingleLine: WithoutElse
+AllowShortLambdasOnASingleLine: All
+AllowShortLoopsOnASingleLine: true
+AlwaysBreakAfterDefinitionReturnType: None
+AlwaysBreakBeforeMultilineStrings: true
+BinPackArguments: true
+BinPackParameters: true
+BitFieldColonSpacing: None
+BraceWrapping:
+  AfterCaseLabel: false
+  AfterClass: false
+  AfterControlStatement: Never
+  AfterEnum: false
+  AfterExternBlock: false
+  AfterFunction: true
+  AfterNamespace: false
+  AfterObjCDeclaration: false
+  AfterStruct: false
+  AfterUnion: false
+  BeforeCatch: true
+  BeforeElse: false
+  BeforeLambdaBody: false
+  BeforeWhile: false
+  IndentBraces: false
+  SplitEmptyFunction: true
+  SplitEmptyRecord: true
+  SplitEmptyNamespace: true
+BreakAdjacentStringLiterals: true
+BreakAfterAttributes: Leave
+BreakAfterReturnType: AllDefinitions
+BreakBeforeBinaryOperators: NonAssignment
+BreakBeforeConceptDeclarations: Always
+BreakBeforeBraces: Custom
+BreakBeforeInlineASMColon: OnlyMultiline
+BreakBeforeTernaryOperators: true
+BreakConstructorInitializers: BeforeColon
+BreakFunctionDefinitionParameters: false
+BreakInheritanceList: BeforeColon
+BreakStringLiterals: true
+BreakTemplateDeclarations: Yes
+ColumnLimit: 79
+CompactNamespaces: false
+ConstructorInitializerIndentWidth: 4
+ContinuationIndentWidth: 4
+Cpp11BracedListStyle: true
+DerivePointerAlignment: true
+EmptyLineAfterAccessModifier: Never
+EmptyLineBeforeAccessModifier: LogicalBlock
+FixNamespaceComments: true
+IncludeBlocks: Regroup
+IncludeCategories:
+  - Regex: '^[<"]Python\.h[">]$'
+    Priority: 2
+    CaseSensitive: true
+  - Regex: '^<[[:alnum:]_/]+(\.h)?>$'
+    Priority: 1
+  - Regex: '.*'
+    Priority: 3
+IndentAccessModifiers: false
+IndentCaseBlocks: false
+IndentCaseLabels: false
+IndentExternBlock: NoIndent
+IndentGotoLabels: false
+IndentPPDirectives: None
+IndentRequiresClause: true
+IndentWidth: 4
+IndentWrappedFunctionNames: false
+InsertBraces: false
+InsertNewlineAtEOF: true
+InsertTrailingCommas: None
+KeepEmptyLines:
+  AtEndOfFile: false
+  AtStartOfBlock: false
+  AtStartOfFile: false
+LambdaBodyIndentation: Signature
+LineEnding: DeriveLF
+MacroBlockBegin: ''
+MacroBlockEnd: ''
+Macros:
+  - >-
+    PyObject_HEAD_INIT(type)={
+        /* this is not exactly match with PyObject_HEAD_INIT in Python source code
+         * but it is enough for clang-format */
+        { 0xFFFFFFFF },
+        (type)
+    },
+  - >-
+    PyVarObject_HEAD_INIT(type, size)={
+        {
+            /* manually expand PyObject_HEAD_INIT(type) above
+             * because clang-format do not support recursive expansion */
+            { 0xFFFFFFFF },
+            (type)
+        },
+        (size)
+    },
+  - PyMODINIT_FUNC=PyObject *
+MainIncludeChar: Quote
+MaxEmptyLinesToKeep: 2
+NamespaceIndentation: None
+PackConstructorInitializers: NextLine
+PenaltyBreakAssignment: 20
+PenaltyBreakBeforeFirstCallParameter: 1
+PenaltyBreakComment: 300
+PenaltyBreakFirstLessLess: 120
+PenaltyBreakOpenParenthesis: 0
+PenaltyBreakScopeResolution: 500
+PenaltyBreakString: 1000
+PenaltyBreakTemplateDeclaration: 10
+PenaltyExcessCharacter: 1000000
+PenaltyIndentedWhitespace: 0
+PenaltyReturnTypeOnItsOwnLine: 1000000000
+PointerAlignment: Right
+PPIndentWidth: -1
+QualifierAlignment: Custom
+QualifierOrder:
+  [friend, static, inline, const, constexpr, volatile, type, restrict]
+ReferenceAlignment: Right
+ReflowComments: false
+RemoveBracesLLVM: false
+RemoveParentheses: MultipleParentheses
+RemoveSemicolon: true
+RequiresClausePosition: OwnLine
+RequiresExpressionIndentation: OuterScope
+SeparateDefinitionBlocks: Leave
+ShortNamespaceLines: 1
+SkipMacroDefinitionBody: false
+SortIncludes: CaseSensitive
+SortUsingDeclarations: LexicographicNumeric
+SpaceAfterCStyleCast: false
+SpaceAfterLogicalNot: false
+SpaceAfterTemplateKeyword: true
+SpaceAroundPointerQualifiers: Default
+SpaceBeforeAssignmentOperators: true
+SpaceBeforeCaseColon: false
+SpaceBeforeCpp11BracedList: false
+SpaceBeforeCtorInitializerColon: true
+SpaceBeforeInheritanceColon: true
+SpaceBeforeJsonColon: false
+SpaceBeforeParens: Always
+SpaceBeforeRangeBasedForLoopColon: true
+SpaceBeforeSquareBrackets: false
+SpaceInEmptyBlock: false
+SpacesBeforeTrailingComments: 2
+SpacesInAngles: Never
+SpacesInContainerLiterals: true
+SpacesInLineCommentPrefix:
+  Minimum: 1
+  Maximum: -1
+SpacesInParens: Never
+SpacesInSquareBrackets: false
+Standard: c++11
+StatementAttributeLikeMacros:
+StatementMacros:
+  - PyObject_HEAD
+TableGenBreakInsideDAGArg: DontBreak
+TabWidth: 4
+TypeNames:
+  # Defined in Include/pytypedefs.h
+  - PyModuleDef
+  - PyModuleDef_Slot
+  - PyMethodDef
+  - PyGetSetDef
+  - PyMemberDef
+  - PyObject
+  - PyLongObject
+  - PyTypeObject
+  - PyThreadState
+  - PyInterpreterState
+UseTab: Never