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ES6 bnf grammer - See https://avdg.github.io/es6.xhtml
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| /* ebnf file for es 6 - MAY CONTAIN ERRORS / DISAMBIGUITY */ | |
| Grammer::= Statement | |
| /* Lexical grammer */ | |
| SourceCharacter ::= #x0000-#x10FFFF | |
| InputElementDiv ::= WhiteSpace | LineTerminator | Comment | CommonToken | DivPunctuator | RightBracePunctuator | |
| InputElementRegExp ::= WhiteSpace | LineTerminator | Comment | CommonToken | RightBracePunctuator | RegularExpressionLiteral | |
| InputElementRegExpOrTemplateTail ::= WhiteSpace | LineTerminator | Comment | CommonToken | RegularExpressionLiteral | TemplateSubstitutionTail | |
| InputElementTemplateTail ::= WhiteSpace | LineTerminator | Comment | CommonToken | DivPunctuator | TemplateSubstitutionTail | |
| WhiteSpace ::= "<TAB>" | "<VT>" | "<FF>" | "<SP>" | "<NBSP>" | "<ZWNBSP>" | "<USP>" | |
| LineTerminator ::= "<LF>" | "<CR>" | "<LS>" | "<PS>" /* #x0012 #x0015 #x2028 #x2029 */ | |
| LineTerminatorSequence ::= "<LF>" | "<CR>" "<LF>"? | "<LS>" | "<PS>" | |
| Comment ::= MultiLineComment | SingleLineComment | |
| MultiLineComment ::= "/*" MultiLineCommentChars? "*/" | |
| MultiLineCommentChars ::= MultiLineNotAsteriskChar MultiLineCommentChars? | |
| PostAsteriskCommentChars ::= MultiLineNotForwardSlashOrAsteriskChar MultiLineCommentChars? | "*" PostAsteriskCommentChars? | |
| MultiLineNotAsteriskChar ::= /* SourceCharacter but not */ [^*] | |
| MultiLineNotForwardSlashOrAsteriskChar ::= /* SourceCharacter but not one of */ [^/*] | |
| SingleLineComment ::= "/" "/" SingleLineCommentChars? | |
| SingleLineCommentChars ::= SingleLineCommentChar SingleLineCommentChars? | |
| SingleLineCommentChar ::= /* SourceCharacter but not LineTerminator*/ [^ #x0012 #x0015 #x2028 #x2029 ] | |
| CommonToken ::= IdentifierName | Punctuator | NumericLiteral | StringLiteral | Template | |
| IdentifierName ::= IdentifierStart | IdentifierName IdentifierPart | |
| IdentifierStart ::= UnicodeIDStart | "$" | "_" | "\" UnicodeEscapeSequence | |
| IdentifierPart ::= UnicodeIDContinue | "$" | "_" | "\" UnicodeEscapeSequence | "<ZWNJ>" | "<ZWJ>" | |
| UnicodeIDStart ::= [https://github.com/mathiasbynens/unicode-data/blob/master/5.1.0/properties/ID_Start-regex.js] /* Unicode 5.1 or later */ | |
| UnicodeIDContinue ::= [https://github.com/mathiasbynens/unicode-data/blob/master/5.1.0/properties/Other_ID_Continue-regex.js] /* Unicode 5.1 or later */ | |
| ReservedWord ::= Keyword | FutureReservedWord | NullLIteral | BooleanLiteral | |
| Keyword ::= "break" | "case" | "catch" | "class" | "const" | "continue" | "debugger" | "default" | "delete" | | |
| "do" | "else" | "export" | "extends" | "finally" | "for" | "function" | "if" | "import" | | |
| "in" | "instanceof" | "new" | "return" | "super" | "switch" | "this" | "throw" | "try" | | |
| "typeof" | "var" | "void" | "while" | "with" | "yield" | |
| FutureReservedWord ::= "enum" | "await" /* await is only treated as a FutureReservedWord when Module is the goal symbol of the syntactic grammar. */ | |
| /* The following tokens are also considered to be FutureReservedWords when parsing strict mode code: */ | |
| | "implements" | "interface" | "package" | "private" | "protected" | "public" | |
| Punctuator ::= "{" | "}" | "(" | ")" | "[" | "]" | "." | ";" | "," | "<" | ">" | "<=" | ">=" | "==" | "!=" | "===" | "!==" | | |
| "+" | "-" | "*" | "%" | "++" | "--" | "<<" | ">>" | ">>>" | "&" | "|" | "^" | | |
| "!" | "~" | "&&" | "?" | ":" | "=" | "+=" | "-=" | "*=" | "%=" | "<<=" | ">>=" | ">>>=" | "&=" | "|=" | "^=" | "=>" | |
| DivPunctuator ::= "/" | "/=" | |
| RightBracePunctuator ::= "}" | |
| NullLiteral ::= "null" | |
| BooleanLiteral ::= "true" | "false" | |
| NumbericLiteral ::= DecimalLiteral | BinaryLiteral | OctalIntegerLiteral | HexIntegerLiteral | |
| DecimalLiteral ::= DecimalIntegerLiteral "." DecimalDigits? ExponentPart? | "." DecimalDigits ExponentPart? | DecimalIntegerLiteral ExponentPart? | |
| DecimalIntegerLiteral ::= "0" | NonZeroDigit DecimalDigits? | |
| DecimalDigits ::= DecimalDigit | DecimalDigits DecimalDigit | |
| DecimalDigit ::= "0" | "1" | "2" | "3" | "4" | "5" | "6" | "7" | "8" | "9" | |
| NonZeroDigit ::= "1" | "2" | "3" | "4" | "5" | "6" | "7" | "8" | "9" | |
| ExponentPart ::= ExponentIndicator SignedInteger | |
| ExponentIndicator ::= "e" | "E" | |
| SignedInteger ::= DecimalDigits | "+" DecimalDigits | "-" DecimalDigits | |
| BinaryIntegerLiteral ::= "0b" BinaryDigits | "0B" BinaryDigits | |
| BinaryDigits ::= BinaryDigit | BinaryDigits BinaryDigit | |
| BinaryDigit ::= "0" | "1" | |
| OctalIntegerLiteral ::= "0o" OctalDigits | "0O" OctalDigits | |
| OctalDigits ::= OctalDigit | OctalDigits OctalDigit | |
| OctalDigit ::= "0" | "1" | "2" | "3" | "4" | "5" | "6" | "7" | |
| HexIntegerLiteral ::= "0x" HexDigits | "0X" HexDigits | |
| HexDigits ::= HexDigit | HexDigits HexDigit | |
| HexDigit ::= "0" | "1" | "2" | "3" | "4" | "5" | "6" | "7" | "8" | "9" | "a" | "b" | "c" | "d" | "e" | "f" | "A" | "B" | "C" | "D" | "E" | "F" | |
| StringLiteral ::= '"' DoubleStringCharacters? '"' | '"' SingleStringCharacters? '"' | |
| DoubleStringCharacters ::= DoubleStringCharacter DoubleStringCharacters? | |
| SingleStringCharacters ::= SingleStringCharacter SingleStringCharacters? | |
| DoubleStringCharacter ::= /* chars are lineTerminators */ [^" \ #x0012 #x0015 #x2028 #x2029] | "\" EscapeSequence | LineContinuation | |
| SingleStringCharacter ::= /* chars are lineTerminators */ [^' \ #x0012 #x0015 #x2028 #x2029] | "\" EscapeSequence | LineContinuation | |
| LineContinuation ::= "\" LineTerminatorSequence | |
| EscapeSequence ::= CharacterEscapeSequence | "0" /* lookahead not DecimalDigit */ [^ 0 1 2 3 4 5 6 7 8 9] | HexEscapeSequence | UnicodeEscapeSequence | |
| CharacterEscapeSequence ::= SingleEscapeCharacter | NonEscapeCharacter | |
| SingleEscapeCharacter ::= "'" | '"' | "\" | "b" | "f" | "n" | "r" | "t" | "v" | |
| NonEscapeCharacter ::= /* SourceCharacter but not one of EscapeCharacter or LineTerminator */ [^ ' " \ b f n r t v #x0012 #x0015 #x2028 #x2029] | |
| EscapeCharacter ::= SingleEscapeCharacter | DecimalDigit | "x" | "u" | |
| HexEscapeSequence ::= "x" HexDigit HexDigit | |
| UnicodeEscapeSequence ::= "u" Hex4Digits | "u{" HexDigits "}" | |
| Hex4Digits ::= HexDigit HexDigit HexDigit HexDigit | |
| RegularExpressionLiteral ::= "/" RegularExpressionBody "/" RegularExpressionFlags | |
| RegularExpressionBody ::= RegularExpressionFirstChar RegularExpressionChars | |
| RegularExpressionChars ::= | RegularExpressionChars RegularExpressionChar | |
| RegularExpressionFirstChar ::= /* RegularExpressionNonTerminator but not one of * or \ or / or [ */ [^ #x0012 #x0015 #x2028 #x2029 * \ / []| RegularExpressionBackslashSequence | RegularExpressionClass | |
| RegularExpressionChar ::= /* RegularExpressionNonTerminator but not one of \ or / or [ */ [^ #x0012 #x0015 #x2028 #x2029 \ / []| RegularExpressionBackslashSequence | RegularExpressionClass | |
| RegularExpressionBackslashSequence ::= "\" RegularExpressionNonTerminator | |
| RegularExpressionNonTerminator ::= /* SourceCharacter but not LineTerminator */ [^#x0012 #x0015 #x2028 #x2029] | |
| RegularExpressionClass ::= "[" RegularExpressionClassChars "]" | |
| RegularExpressionClassChars ::= | RegularExpressionClassChars RegularExpressionClassChar | |
| RegularExpressionClassChar ::= /* RegularExpressionNonTerminator but not one of ] or \ */ [^ \ #x0012 #x0015 #x2028 #x2029 #x005D] | RegularExpressionBackslashSequence | |
| RegularExpressionFlags ::= | RegularExpressionFlags IdentifierPart | |
| Template ::= NoSubstitutionTemplate | TemplateHead | |
| NoSubstitutionTemplate ::= "`" TemplateCharacters? "`" | |
| TemplateHead ::= "`" TemplateCharacters? "${" | |
| TemplateSubstitutionTail ::= TemplateMiddle | TemplateTail | |
| TemplateMiddle ::= "}" TemplateCharacters? "${" | |
| TemplateTail ::= "}" TemplateCharacters? "`" | |
| TemplateCharacters ::= TemplateCharacter TemplateCharacters? | |
| TemplateCharacter ::= "$" [^{] | "\" EscapeSequence | LineContinuation | LineTerminatorSequence | /* SourceCharacter but not one of ` or \ or $ or LineTerminator */ [^ ` \ $ #x0012 #x0015 #x2028 #x2029] | |
| /* Expressions */ | |
| IdentifierReference ::= Identifier | /* [~Yield] */ "yield" | |
| BindingIdentifier ::= Identifier | /* [~Yield] */ "yield" | |
| LabelIdentifier ::= Identifier | /* [~Yield] */ "yield" | |
| Identifier ::= /* IdentifierName but not ReservedWord */ IdentifierName | |
| PrimaryExpression ::= "this" | IdentifierReference | Literal | ArrayLiteral | ObjectLiteral | FunctionExpression | ClassExpression | GeneratorExpression | RegularExpressionLiteral | | |
| TemplateLIteral | CoverParenthesizedExpressionAndArrowParameterList | |
| CoverParenthesizedExpressionAndArrowParameterList ::= "(" Expression ")" | "(" ")" | "(" "..." BindingIdentifier ")" | "(" Expression "," "..." BindingIdentifier ")" | |
| ParenthesizedExpression ::= "(" Expression ")" | |
| Literal ::= NullLiteral | BooleanLiteral | NumbericLiteral | StringLiteral | |
| ArrayLiteral ::= "[" Elision? "]" | "[" ElementList "]" | "[" ElementList "," Elision? "]" | |
| ElementList ::= Elision? AssignmentExpression | Elision? SpreadElement | ElementList "," Elision? AssignmentExpression | ElementLIst "," | Elision? SpreadElement | |
| Elision ::= "," | Elision "," | |
| SpreadElement ::= "..." AssignmentExpression | |
| ObjectLiteral ::= "{" "}" | "{" PropertyDefinitionList "}" | "{" PropertyDefinitionList "," "}" | |
| PropertyDefinitionList ::= PropertyDefinition | PropertyDefinitionList "," PropertyDefinition | |
| PropertyDefinition ::= IdentifierReference | CoverInitializedName | PropertyName ":" AssignmentExpression | MethodDefinition | |
| PropertyName ::= LiteralPropertyName | ComputedPropertyName | |
| LiteralPropertyName ::= IdentifierName | StringLiteral | NumericLiteral | |
| ComputedPropertyName ::= "[" AssignmentExpression "]" | |
| CoverInitializedName ::= IdentifierReference Initializer | |
| Initializer ::= "=" AssignmentExpression | |
| TemplateLiteral ::= NoSubstitutionTemplate | TemplateHead Expression TemplateSpans | |
| TemplateSpans ::= TemplateTail | TemplateMiddleList TemplateTail | |
| TemplateMiddleList ::= TemplateMiddle Expression | TemplateMiddleList TemplateMiddle Expression | |
| MemberExpression ::= PrimaryExpression | MemberExpression "[" Expression "]" | MemberExpression "." IdentifierName | MemberExpression TemplateLiteral | |
| | SuperProperty | MetaProperty | "new" MemberExpression Arguments | |
| SuperProperty ::= "super" "[" Expression "]" | "super" "." IdentifierName | |
| MetaProperty ::= NewTarget | |
| NewTarget ::= "new" "." "target" | |
| NewExpression ::= MemberExpression | "new" NewExpression | |
| CallExpression ::= MemberExpression Arguments | SuperCall | CallExpression Arguments | CallExpression "[" Expression "]" | CallExpression "." IdentifierName | CallExpression TemplateLiteral | |
| SuperCall ::= "super" Arguments | |
| Arguments ::= "(" ")" | "(" ArgumentList ")" | |
| ArgumentList ::= AssignmentExpression | "..." AssignmentExpression | ArgumentList "," AssignmentExpression | ArugmentList "," "..." AssignmentExpression | |
| LeftHandSideExpression ::= NewExpression | CallExpression | |
| PostfixExpression ::= LeftHandSideExpression | LeftHandSideExpression /* no LineTerminator here */ "++" | LeftHandSideExpression /* no LineTerminator here */ "--" | |
| UnaryExpression ::= PostfixExpression | "delete" UnaryExpression | "void" UnaryExpression | "typeof" UnaryExpression | |
| | "++" UnaryExpression | "--" UnaryExpression | "+" UnaryExpression | "-" UnaryExpression | "~" UnaryExpression | "!" UnaryExpression | |
| MultiplicativeExpression ::= UnaryExpression | MultiplicativeExpression MultiplicativeOperator UnaryExpression | |
| MultiplicativeOperator ::= [* / %] | |
| AdditiveExpression ::= MultiplicativeExpression | AdditiveExpression "+" MultiplicativeExpression | AdditiveExpression "-" MultiplicativeExpression | |
| ShiftExpression ::= AdditiveExpression | ShiftExpression "<<" AdditiveExpression | ShiftExpression ">>" AdditiveExpression | ShiftExpression ">>>" AdditiveExpression | |
| RelationalExpression ::= ShiftExpression | RelationalExpression "<" ShiftExpression | |
| | RelationalExpression ">" ShiftExpression | |
| | RelationalExpression "<=" ShiftExpression | |
| | RelationalExpression ">=" ShiftExpression | |
| | RelationalExpression "instanceof" ShiftExpression | |
| | RelationalExpression "in" ShiftExpression | |
| EqualityExpression ::= RelationalExpression | |
| | EqualityExpression "==" RelationalExpression | |
| | EqualityExpression "!=" RelationalExpression | |
| | EqualityExpression "===" RelationalExpression | |
| | EqualityExpression "!==" RelationalExpression | |
| BitwiseANDExpression ::= RelationalExpression | |
| | BitwiseANDExpression "&" RelationalExpression | |
| BitwiseXORExpression ::= BitwiseANDExpression | |
| | BitwiseXORExpression "^" BitwiseANDExpression | |
| BitwiseORExpression ::= BitwiseXORExpression | |
| | BitwiseORExpression "|" BitwiseXORExpression | |
| ConditionalExpression ::= LogicalORExpression | |
| | LogicalORExpression "?" AssignmentExpression ":" AssignmentExpression | |
| AssignmentExpression ::= ConditionalExpression | |
| | YieldExpression | |
| | ArrowFunction | |
| | LeftHandSideExpression "=" AssignmentExpression | |
| | LeftHandSideExpression AssignmentOperator AssignmentExpression | |
| AssignmentOperator ::= "*=" | "/=" | "%=" | "+=" | "-=" | "<<=" | ">>=" | ">>>=" | "&=" | "^=" | "|=" | |
| Expression ::= AssignmentExpression | Expression AssignmentExpression | |
| /* Statements */ | |
| Statement ::= BlockStatement | VariableStatement | EmptyStatement | ExpressionStatement | IfStatement | |
| | BreakableStatement | ContinueStatement | BreakStatement | ReturnStatement | WithStatement | |
| | LabelledStatement | ThrowStatement | TryStatement | DebuggerStatement | |
| Declaration ::= HoistableDeclaration | ClassDeclaration | LexicalDeclaration | |
| HoistableDeclaration ::= FunctionDeclaration | GeneratorDeclaration | |
| BreakableStatement ::= IterationStatement | SwitchStatement | |
| BlockStatement ::= Block | |
| Block ::= "{" StatementList? "}" | |
| StatementList ::= StatementListItem | StatementList StatementListItem | |
| StatementListItem ::= Statement | Declaration | |
| LexicalDeclaration ::= LetOrConst BindingList | |
| LetOrConst ::= "let" | "const" | |
| BindingList ::= LexicalBinding | BindingList "," LexicalBinding | |
| LexicalBinding ::= BindingIdentifier Initializer? | BindingPattern Initializer | |
| VariableStatement ::= "var" VariableDeclarationList | |
| VariableDeclarationList ::= VariableDeclaration | VariableDeclarationList "," VariableDeclaration | |
| VariableDeclaration ::= BindingIdentifier Initializer? | BindingPattern Initializer | |
| BindingPattern ::= ObjectBindingPattern | ArrayBindingPattern | |
| ObjectBindingPattern ::= "{" "}" | "{" BindingPropertyList "}" | "{" BindingPropertyList "," "}" | |
| ArrayBindingPattern ::= "[" Elision? BindingRestElement? "]" | "[" BindingElementList "]" | "[" BindingElementList "," Elision? BindingRestElement? "]" | |
| BindingPropertyList ::= BindingProperty | BindingPropertyList BindingProperty | |
| BindingElementList ::= BindingElisionElement | BindingElementList "," BindingElisionElement | |
| BindingElisionElement ::= Elision? BindingElement | |
| BindingProperty ::= SingleNameBinding | PropertyName ":" BindingElement | |
| BindingElement ::= SingleNameBinding | BindingPattern Initializer? | |
| SingleNameBinding ::= BindingIdentifier Initializer? | |
| BindingRestElement ::= "..." BindingIdentifier | |
| EmptyStatement ::= ";" | |
| ExpressionStatement ::= /* [lookahead ∉ {{, function, class, let [}] */ Expression ";" | |
| IfStatement ::= "if" "(" Expression ")" Statement "else" statement | |
| | "if" "(" Expression ")" Statement | |
| IterationStatement ::= "do" Statement "while" "(" Expression ")" ";" | |
| | "while" "(" Expression ")" Statement | |
| | "for" "(" /* [lookahead ∉ {let [}] */ Expression? ";" Expression? ";" Expression? ")" Statement | |
| | "for" "(" "var" VariableDeclarationList ";" Expression? ";" Expression? ")" Statement | |
| | "for" "(" LexicalDeclaration Expression? ";" Expression? ";" Expression? ")" Statement | |
| | "for" "(" /* [lookahead ∉ {let [}] */ LeftHandSideExpression "in" Expression ")" Statement | |
| | "for" "(" "var" ForBinding "in" Expression ")" Statement | |
| | "for" "(" ForDeclaration "in" Expression ")" Statement | |
| | "for" "(" /* [lookahead ∉ {let [}] */ LeftHandSideExpression "of" AssignmentExpression ")" Statement | |
| | "for" "(" "var" ForBinding "of" AssignmentExpression ")" Statement | |
| | "for" "(" LexicalDeclaration Expression "of" AssignmentExpression ")" Statement | |
| ForDeclaration ::= LetOrConst ForBinding | |
| ForBinding ::= BindingIdentifier | BindingPattern | |
| ContinueStatement ::= "continue" ";" | "continue" /* no LineTerminator here */ LabelIdentifier ";" | |
| BreakStatement ::= "break" ";" | "break" /* no LineTerminator here */ LabelIdentifier ";" | |
| ReturnStatement ::= "return" ";" | "return" /* no LineTerminator here */ Expression ";" | |
| WithStatement ::= "with" "(" Expression ")" Statement | |
| SwitchStatement ::= "switch" "(" Expression ")" CaseBlock | |
| CaseBlock ::= "{" CaseClauses? "}" | "{" CaseClauses? DefaultClause CaseClauses? "}" | |
| CaseClauses ::= CaseClause | CaseClauses CaseClause | |
| CaseClause ::= "case" Expression ":" StatementList? | |
| DefaultClause ::= "default" ":" StatementList? | |
| LabelledStatement ::= LabelIdentifier ":" LabelledItem | |
| LabelledItem ::= Statement | FunctionDeclaration | |
| ThrowStatement ::= "throw" /* no LineTerminator here */ Expression ";" | |
| TryStatement ::= "try" Block Catch | "try" Block Finally | "try" Block Catch finally | |
| Catch ::= "catch" "(" CatchParameter ")" Block | |
| Finally ::= "finally" Block | |
| CatchParameter ::= BindingIdentifier | BindingPattern | |
| DebuggerStatement ::= "debugger" ";" | |
| /* Functions and classes */ | |
| FunctionDeclaration ::= "function" BindingIdentifier "(" FormalParameters ")" "{" FunctionBody "}" | |
| | /* [+Default] */ "function" "(" FormalParameters ")" "{" FunctionBody "}" | |
| FunctionExpression ::= "function" BindingIdentifier? "(" FormalParameters ")" "{" FunctionBody "}" | |
| StrictFormalParameters ::= FormalParameters | |
| FormalParameters ::= | FormalParameterList | |
| FormalParameterList ::= FunctionRestParameter | FormalsList | FormalsList "," FormalParameter | |
| FormalsList ::= FormalParameter | FormalsList "," FormalParameter | |
| FunctionRestParameter ::= BindingRestElement | |
| FormalParameter ::= BindingElement | |
| FunctionBody ::= FunctionStatementList | |
| FunctionStatementList ::= StatementList? | |
| ArrowFunction ::= ArrowParameters /* no LineTerminator here */ "=>" ConciseBody | |
| ArrowParameters ::= BindingIdentifier | CoverParenthesizedExpressionAndArrowParameterList | |
| ConciseBody ::= /* [lookahead ≠ { ] */ AssignmentExpression | "{" FunctionBody "}" | |
| ArrowFormalParameters ::= "(" StrictFormalParameters ")" | |
| MethodDefinition ::= PropertyName "(" StrictFormalParameters ")" "{" FunctionBody "}" | |
| | GeneratorMethod | |
| | "get" PropertyName "(" ")" "{" FunctionBody "}" | |
| | "set" PropertyName "(" PropertySetParameterList ")" "{" FunctionBody "}" | |
| PropertySetParameterList ::= FormalParameter | |
| GeneratorMethod ::= "*" PropertyName "(" StrictFormalParameters ")" "{" GeneratorBody "}" | |
| GeneratorDeclaration ::= "function" "*" BindingIdentifier "(" FormalParameters ")" "{" GeneratorBody "}" | |
| | /* [+Default] */ "function" "*" "(" FormalParameters ")" "{" GeneratorBody "}" | |
| GeneratorExpression ::= "function" "*" BindingIdentifier? "(" FormalParameters ")" "{" GeneratorBody "}" | |
| GeneratorBody ::= FunctionBody | |
| YieldExpression ::= "yield" | |
| | "yield" /* no LineTerminator here */ AssignmentExpression | |
| | "yield" /* no LineTerminator here */ "*" AssignmentExpression | |
| ClassDeclaration ::= "class" BindingIdentifier? ClassTail | |
| | /* [+Default] */ class ClassTail | |
| ClassExpression ::= "class" BindingIdentifier? ClassTail | |
| ClassTail ::= ClassHeritage? "{" ClassBody? "}" | |
| ClassHeritage ::= "extends" LeftHandSideExpression | |
| ClassBody ::= ClassElementList | |
| ClassElementList ::= ClassElement | |
| | classElementLIst ClassElement | |
| ClassElement ::= MethodDefinition | |
| | "static" MethodDefinition | |
| | ";" | |
| /* Scripts and Modules */ | |
| script ::= ScriptBody? | |
| ScriptBody ::= StatementList | |
| Module ::= ModuleBody? | |
| ModuleBody ::= ModuleItemList | |
| ModuleItemList ::= ModuleItem | |
| | ModuleItemList ModuleItem | |
| ModuleItem ::= ImportDeclaration | |
| | ExportDeclaration | |
| | StatementListItem | |
| ImportDeclaration ::= "import" ImportClause FromClause ";" | |
| | "import" ModuleSpecifier ";" | |
| ImportClause ::= ImportedDefaultBinding | |
| | NameSpaceImport | |
| | NamedImports | |
| | ImportedDefaultBinding "," NameSpaceImport | |
| | ImportedDefaultBinding "," NamedImports | |
| ImportedDefaultBinding ::= ImportedBinding | |
| NameSpaceImport ::= "*" "as" ImportedBinding | |
| NamedImports ::= "{" "}" | |
| FromClause ::= "from" ModuleSpecifier | |
| ImportsList ::= ImportSpecifier | |
| | ImportsList "," ImportSpecifier | |
| ImportSpecifier ::= ImportedBinding | |
| | IdentifierName "as" ImportedBinding | |
| ModuleSpecifier ::= StringLiteral | |
| ImportedBinding ::= BindingIdentifier | |
| ExportDeclaration ::= "export" "*" FromClause ";" | |
| | "export" ExportClause FromClause ";" | |
| | "export" ExportClause ";" | |
| | "export" VariableStatement | |
| | "export" Declaration | |
| | "export" "default" HoistableDeclaration | |
| | "export" "default" ClassDeclaration | |
| | "export" "default" /* [lookahead ∉ {function, class}] */ AssignmentExpression ";" | |
| ExportClause ::= "{" "}" | |
| | "{" ExportList "}" | |
| | "{" ExportList "," "}" | |
| ExportList ::= ExportSpecifier | |
| | ExportsList "," ExportSpecifier | |
| ExportSpecifier ::= IdentifierName | |
| | IdentifierName "as" IdentifierName | |
| /* Number Conversions */ | |
| StringNumericLiteral ::= StrWhiteSpace? | |
| | StrWhiteSpace? StrNumericLiteral StrWhiteSpace? | |
| StrWhiteSpace ::= StrWhiteSpaceChar StrWhiteSpace? | |
| StrWhiteSpaceChar ::= WhiteSpace | |
| | LineTerminator | |
| StrNumericLiteral ::= StrDecimalLiteral | |
| | BinaryIntegerLiteral | |
| | OctalIntegerLiteral | |
| | HexIntegerLiteral | |
| StrDecimalLiteral ::= StrUnsignedDecimalLiteral | |
| | "+" StrUnsignedDecimalLiteral | |
| | "-" StrUnsignedDecimalLiteral | |
| StrUnsignedDecimalLiteral ::= "Infinity" | |
| | DecimalDigits "." DecimalDigits? ExponentPart? | |
| | "." DecimalDigits ExponentPart? | |
| | DecimalDigits ExponentPart? | |
| /* Also using, but already declared: DecimalDigits DecimalDigit ExponentPart ExponentIndicator SignedInteger HexIntegerLiteral HexDigit */ | |
| /* Universal Resource Identifier Character Classes */ | |
| uri ::= uriCharacters? | |
| uriCharacters ::= uriCharacter uriCharacters? | |
| uriCharacter ::= uriReserved | |
| | uriUnescaped | |
| | uriEscaped | |
| uriReserved ::= [ ; / ? : @ & = + $ , ] | |
| uriUnescaped ::= uriAlpha | |
| | DecimalDigit | |
| | uriMark | |
| uriEscaped ::= "%" HexDigit HexDigit | |
| uriAlpha ::= [abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ] | |
| uriMark ::= [-_.!~*'()] | |
| /* Regular Expressions */ | |
| Pattern ::= Disjunction | |
| Disjunction ::= Alternative | |
| | Alternative "|" Disjunction | |
| Alternative ::= /* empty */ | |
| | Alternative Term | |
| Term ::= Assertion | |
| | Atom | |
| | Atom Quantifier | |
| Assertion ::= "^" | |
| | "$" | |
| | "\" "b" | |
| | "\" "B" | |
| | "(" "?" "=" Disjunction ")" | |
| | "(" "?" "!" Disjunction ")" | |
| Quantifier ::= QuantifierPrefix | |
| | QuantifierPrefix "?" | |
| QuantifierPrefix ::= "*" | |
| | "+" | |
| | "?" | |
| | "{" DecimalDigits "}" | |
| | "{" DecimalDigits "," "}" | |
| | "{" DecimalDigits "," DecimalDigits "}" | |
| Atom ::= PatternCharacter | |
| | "." | |
| | "\" AtomEscape | |
| | CharacterClass | |
| | "(" Disjunction ")" | |
| | "(" "?" ":" Disjunction ")" | |
| SyntaxCharacter ::= [$^\.*+?()[#x005D{}|] /* #x005D is ] */ | |
| PatternCharacter ::= /* SourceCharacter but not SyntaxCharacter */ [^$^\.*+?()[#x005D{}|] /* #x005D is ] */ | |
| AtomEscape ::= DecimalEscape | |
| | CharacterEscape | |
| | CharacterClassEscape | |
| CharacterEscape ::= ControlEscape | |
| | "c" ControlLetter | |
| | HexEscapeSequence | |
| | RegExpUnicodeEscapeSequence | |
| | IdentityEscape | |
| ControlLetter ::= [fnrtv] | |
| ControlEscape ::= uriAlpha /* being lazy */ | |
| RegExpUnicodeEscapeSequence ::= "u" LeadSurrogate "\u" TrailSurrogate | |
| | "u" LeadSurrogate | |
| | "u" TrailSurrogate | |
| | "u" NonSurrogate | |
| | Hex4Digits | |
| | "u{" HexDigits "}" | |
| LeadSurrogate ::= Hex4Digits /* [match only if the SV of Hex4Digits is in the inclusive range 0xD800 to 0xDBFF] */ | |
| TrailSurrogate ::= Hex4Digits /* [match only if the SV of Hex4Digits is in the inclusive range 0xDC00 to 0xDFFF] */ | |
| NonSurrogate ::= Hex4Digits /* [match only if the SV of Hex4Digits is not in the inclusive range 0xD800 to 0xDFFF] */ | |
| IdentityEscape ::= SyntaxCharacter | |
| | "/" | |
| | [^UnicodeContinue] /* SourceCharacter but not UnicodeIDContinue */ | |
| DecimalEscape ::= DecimalIntegerLiteral /* [lookahead ∉ DecimalDigit] */ | |
| CharacterClassEscape ::= [dDsSwW] | |
| CharacterClass ::= "[" /* [lookahead ∉ {^}] */ ClassRanges "]" | |
| | "[" "^" ClassRanges "]" | |
| ClassRanges ::= /* empty */ | |
| | NonemptyClassRanges | |
| NonemptyClassRanges ::= ClassAtom | |
| | ClassAtom NonemptyClassRangesNoDash | |
| | ClassAtom "-" ClassAtom ClassRanges | |
| NonemptyClassRangesNoDash ::= ClassAtom | |
| | ClassAtomNoDash NonemptyClassRangesNoDash | |
| | ClassAtomNoDash "-" ClassAtom ClassRanges | |
| ClassAtom ::= "-" | |
| | ClassAtomNoDash | |
| ClassAtomNoDash ::= /* SourceCharacter but not one of \ or ] or - */ [^\#x005D-] | |
| | "\" ClassEscape | |
| ClassEscape ::= DecimalEscape | |
| | "b" | |
| | "-" | |
| | CharacterEscape | |
| | CharacterClassEscape | |
| /* Additional syntax: (non strict) Numeric Literals */ | |
| NumericLiteral ::= DecimalLiteral | |
| | BinaryIntegerLiteral | |
| | OctalIntegerLiteral | |
| | HexIntegerLiteral | |
| | LegacyOctalIntegerLiteral | |
| LegacyOctalIntegerLiteral ::= "0" OctalDigit | |
| | NonZeroDigit DecimalDigits? | |
| | NonOctalDecimalIntegerLiteral | |
| DecimalIntegerLiteral ::= "0" OctalDigit | |
| | LegacyOctalIntegerLiteral OctalDigit | |
| NonOctalDecimalIntegerLiteral ::= "0" NonOctalDigit | |
| | LegacyOctalLikeDecimalIntegerLiteral NonOctalDigit | |
| | NonOctalDecimalIntegerLiteral DecimalDigit | |
| LegacyOctalLikeDecimalIntegerLiteral ::= "0" OctalDigit | |
| | LegacyOctalLikeDecimalIntegerLiteral OctalDigit | |
| NonOctalDigit ::= "8" | |
| | "9" | |
| /* Additional syntax: (non strict) String Literals */ | |
| EscapeSequence ::= CharacterEscapeSequence | |
| | LegacyOctalEscapeSequence | |
| | HexEscapeSequence | |
| | UnicodeEscapeSequence | |
| LegacyOctalEscapeSequence ::= OctalDigit /* [lookahead ∉ OctalDigit] */ | |
| | ZeroToThree OctalDigit /* [lookahead ∉ OctalDigit] */ | |
| | FourToSeven OctalDigit | |
| | ZeroToThree OctalDigit OctalDigit | |
| ZeroToThree ::= [0123] | |
| FourToSeven ::= [4567] | |
| /* Additional syntax: HTML-like Comments */ | |
| Comment ::= MultiLineComment | |
| | SingleLineComment | |
| | SingleLineHTMLOpenComment | |
| | SingleLineHTMLCloseComment | |
| | SingleLineDelimitedComment | |
| MultiLineComment ::= "/*" FirstCommentLine? LineTerminator MultiLineCommentChart? "*/" HTMLCloseComment? | |
| FirstCommentLine ::= SingleLineDelimitedCommentChars | |
| SingleLineHTMLOpenComment ::= "<!--" SingleLineCommentChars? | |
| SingleLineHTMLCloseComment ::= LineTerminatorSequence HTMLCloseComment | |
| SingleLineDelimiterComment ::= "/*" SingleLineDelimitedCommentChars? "*/" | |
| HTMLCloseComment ::= WhiteSpaceSequence? SingleLineDelimitedCommentSequence? "-->" SingleLineCommentChars? | |
| SingleLineDelimitedCommentChars ::= SingleLineNotAsteriskChar SingleLineDelimitedCommentChars? | |
| | "*" SingleLinePstAsteriskCommentChars? | |
| SingleLineNotAsteriskChar ::= /* SourceCharacter but not one of * or LineTerminator */ [^*#x0012#x0015#x2028#x2029] | |
| SingleLinePostAsteriskCommentChars ::= SingleLineNotForwardSlashOrAsteriskChar SingleLineDelimitedCommentChars? | |
| | "*" SingleLinePostAsteriskCommentChars? | |
| SingleLineNotForwardSlashOrAsteriskChar ::= /* SourceCharacter but not one of / or * or LineTerminator */ [^*/#x0012#x0015#x2028#x2029] | |
| WhiteSpaceSequence ::= WhiteSpace WhiteSpaceSequence? | |
| SingleLineDelimitedCommentSequence ::= SingleLineDelimitedComment WhiteSpaceSequence? SingleLineDelimitedCommentSequence? | |
| /* Additional syntax: Regular Expressions Patterns */ | |
| Term ::= ExtendedTerm | |
| | Assertion | |
| | Atom | |
| | Atom Quantifier | |
| ExtendedTerm ::= Assertion | |
| | AtomNoBrace Quantifier | |
| | Atom | |
| | QuantifiableAssertion Quantifier | |
| AtomNoBrace ::= PatternCharacterNoBrace | |
| | "." | |
| | "\" AtomEscape | |
| | CharacterClass | |
| | "(" Disjunction ")" | |
| | "(" "?" ":" Disjunction ")" | |
| Atom ::= PatternCharacter | |
| | "." | |
| | "\" AtomEscape | |
| | CharacterClass | |
| | "(" Disjunction ")" | |
| | "(" "?" ":" Disjunction ")" | |
| PatternCharacterNoBrace ::= /* SourceCharacter but not one of ^ $ \ . * + ? ( ) [ ] { } | */ [^^$\.*+?()[#x005D{}|] | |
| PatternCharacter ::= /* SourceCharacter but not one of ^ $ \ . * + ? ( ) [ ] | */ [^^$\.*+?()[#x005D|] | |
| QuantifiableAssertion ::= "(" "?" "=" Disjunction ")" | |
| | "(" "?" "!" Disjunction ")" | |
| Assertion ::= "^" | |
| | "$" | |
| | "\" "b" | |
| | "\" "B" | |
| | "(" "?" "=" Disjunction ")" | |
| | "(" "?" "!" Disjunction ")" | |
| | QuantifiableAssertion | |
| AtomEscape ::= DecimalEscape | |
| | CharacterEscape | |
| | CharacterClassEscape | |
| | DecimalEscape /* but only if the integer value of DecimalEscape is <= NCapturingParens */ | |
| | CharacterClassEscape | |
| | CharacterEscape | |
| CharacterEscape ::= ControlEscape | |
| | "c" ControlLetter | |
| | HexEscapeSequence | |
| | RegExpUnicodeEscapeSequence | |
| | LegacyOctalEscapeSequence | |
| | IdentityEscape | |
| IdentityEscape ::= SyntaxCharacter | |
| | "/" | |
| | SourceCharacter /* but not c */ | |
| NonemptyClassRanges ::= ClassAtom | |
| | ClassAtom NonemptyClassRangesNoDash | |
| | ClassAtom "-" ClassAtom ClassRanges | |
| | ClassAtomInRange "-" ClassAtomInRange ClassRanges | |
| NonemptyClassRangesNoDash ::= ClassAtom | |
| | ClassAtomNoDash NonemptyClassRangesNoDash | |
| | ClassAtomNoDash "-" ClassAtom ClassRanges | |
| | ClassAtomNoDashInRange "-" ClassAtomInRange ClassRanges | |
| ClassAtom ::= "-" | |
| | ClassAtomNoDashInRange | |
| ClassAtomNoDash ::= /* SourceCharacter but not one of \ or ] or - */ [^\#x005D-] | |
| | "\" ClassEscape | |
| ClassAtomInRange ::= "-" | |
| | ClassAtomNoDashInRange | |
| ClassAtomNoDashInRange ::= /* SourceCharacter but not one of \ or ] or - */ [^\#x005D-] | |
| | "\" ClassEscape /* but only if ClassEscape evaluates to a CharSet with exactly one character */ | |
| | "\" IdentityEscape | |
| ClassEscape ::= DecimalEscape | |
| | CharacterEscape | |
| | CharacterClassEscape | |
| | DecimalEscape | |
| | "b" | |
| | CharacterClassEscape | |
| | CharacterEscape |
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