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附录A：文法摘要
2018-06-16 15:50 更新
词法
SourceCharacter :: 任意 Unicode 编码单元 InputElementDiv :: WhiteSpace LineTerminator Comment Token DivPunctuator InputElementRegExp :: WhiteSpace LineTerminator Comment Token RegularExpressionLiteral WhiteSpace :: <TAB> <VT> <FF> <SP> <#x0a> <BOM> <USP> LineTerminator :: <LF> <CR> <LS> <PS> LineTerminatorSequence :: <LF> <CR> [lookahead ∉ ] <LS> <PS> <CR> <LF> Comment :: MultiLineComment SingleLineComment MultiLineComment :: /* MultiLineCommentCharsopt */ MultiLineCommentChars :: MultiLineNotAsteriskChar MultiLineCommentCharsopt * PostAsteriskCommentCharsopt PostAsteriskCommentChars :: MultiLineNotForwardSlashorAsteriskChar MultiLineCommentCharsopt * PostAsteriskCommentCharsopt MultiLineNotAsteriskChar :: SourceCharacter 但非 星号 * MultiLineNotForwardSlashorAsteriskChar :: SourceCharacter 但非 正斜杠 / 或 星号 * SingleLineComment :: // SingleLineCommentCharsopt SingleLineCommentChars :: SingleLineCommentChar SingleLineCommentCharsopt SingleLineCommentChar :: SourceCharacter 但非 LineTerminator Token :: IdentifierName Punctuator NumericLiteral StringLiteral Identifier :: IdentifierName 但非 ReservedWord IdentifierName :: IdentifierStart IdentifierName IdentifierPart IdentifierStart :: UnicodeLetter $ _ \ UnicodeEscapeSequence IdentifierPart :: IdentifierStart UnicodeCombiningMark UnicodeDigit UnicodeConnectorPunctuation <ZWNJ> <ZWJ> UnicodeLetter 在以下 Unicode 分类中的字符：“Uppercase letter (Lu)”, “Lowercase letter (Ll)”, “Titlecase letter (Lt)”, “Modifier letter (Lm)”, “Other letter (Lo)”, 或 “Letter number (Nl)”. UnicodeCombiningMark 在以下 Unicode 分类中的字符：“Non-spacing mark (Mn)” 或 “Combining spacing mark (Mc)” UnicodeDigit 在以下 Unicode 分类中的字符：“Decimal number (Nd)” UnicodeConnectorPunctuation 在以下 Unicode 分类中的字符：“Connector punctuation (Pc)” ReservedWord :: Keyword FutureReservedWord NullLiteral BooleanLiteral Keyword :: 以下之一 break do instanceof typeof case else new var catch finally return void continue for switch while debugger function this with default if throw delete in try FutureReservedWord :: 以下之一 class enum extends super const export import 或在严格模式下以下之一 implements let private public interface package protected static yield Punctuator :: 以下之一 { } ( ) [ ] . ; , < > <= >= == != === !== + - * % ++ -- << >> >>> & | ^ ! ~ && || ? : = += -= *= %= <<= >>= >>>= &= |= ^= DivPunctuator :: 以下之一 / /= Literal :: NullLiteral BooleanLiteral NumericLiteral StringLiteral RegularExpressionLiteral NullLiteral :: null BooleanLiteral :: true false NumericLiteral :: DecimalLiteral HexIntegerLiteral DecimalLiteral :: DecimalIntegerLiteral . DecimalDigitsopt ExponentPartopt . DecimalDigits ExponentPartopt DecimalIntegerLiteral ExponentPartopt DecimalIntegerLiteral :: 0 NonZeroDigit DecimalDigitsopt DecimalDigits :: DecimalDigit DecimalDigits DecimalDigit DecimalDigit :: 以下之一 0 1 2 3 4 5 6 7 8 9 NonZeroDigit:: 以下之一 1 2 3 4 5 6 7 8 9 ExponentPart:: ExponentIndicator SignedInteger ExponentIndicator :: 以下之一 e E SignedInteger :: DecimalDigits + DecimalDigits - DecimalDigits HexIntegerLiteral :: 0x HexDigit 0X HexDigit HexIntegerLiteral HexDigit HexDigit :: 以下之一 0 1 2 3 4 5 6 7 8 9 a b c d e f A B C D E F StringLiteral :: "DoubleStringCharactersopt " 'SingleStringCharactersopt ' DoubleStringCharacters :: DoubleStringCharacter DoubleStringCharactersopt SingleStringCharacters :: SingleStringCharacter SingleStringCharactersopt DoubleStringCharacter :: SourceCharacter 但非 double-quote " 或 backslash \ 或 LineTerminator \ EscapeSequence LineContinuation SingleStringCharacter :: SourceCharacter 但非 single-quote ' 或 backslash \ 或 LineTerminator \ EscapeSequence LineContinuation LineContinuation :: \ LineTerminatorSequence EscapeSequence :: CharacterEscapeSequence 0 [lookahead ∉ DecimalDigit] HexEscapeSequence UnicodeEscapeSequence CharacterEscapeSequence :: SingleEscapeCharacter NonEscapeCharacter SingleEscapeCharacter :: 以下之一 ' " \ b f n r t v NonEscapeCharacter :: SourceCharacter 但非 EscapeCharacter 或 LineTerminator EscapeCharacter :: SingleEscapeCharacter DecimalDigit x u HexEscapeSequence :: x HexDigit HexDigit UnicodeEscapeSequence :: u HexDigit HexDigit HexDigit HexDigit RegularExpressionLiteral :: / RegularExpressionBody / RegularExpressionFlags RegularExpressionBody :: RegularExpressionFirstChar RegularExpressionChars RegularExpressionChars :: [empty] RegularExpressionChars RegularExpressionChar RegularExpressionFirstChar :: RegularExpressionNonTerminator 但非 * 或 \ 或 / 或 [ RegularExpressionBackslashSequence RegularExpressionClass RegularExpressionChar :: RegularExpressionNonTerminator 但非 \ 或 / 或 [ RegularExpressionBackslashSequence RegularExpressionClass RegularExpressionBackslashSequence :: \ RegularExpressionNonTerminator RegularExpressionNonTerminator :: SourceCharacter 但非 LineTerminator RegularExpressionClass :: [ RegularExpressionClassChars ] RegularExpressionClassChars :: [ 空 ] RegularExpressionClassChars RegularExpressionClassChar RegularExpressionClassChar :: RegularExpressionNonTerminator 但非 ] 或 \ RegularExpressionBackslashSequence RegularExpressionFlags :: [ 空 ] RegularExpressionFlags IdentifierPart 数字转换
StringNumericLiteral ::: StrWhiteSpaceopt StrWhiteSpaceoptStrNumericLiteral StrWhiteSpaceopt StrWhiteSpace ::: StrWhiteSpaceChar StrWhiteSpaceopt StrWhiteSpaceChar ::: WhiteSpace LineTerminator StrNumericLiteral ::: StrDecimalLiteral HexIntegerLiteral StrDecimalLiteral ::: StrUnsignedDecimalLiteral + StrUnsignedDecimalLiteral - StrUnsignedDecimalLiteral StrUnsignedDecimalLiteral ::: Infinity DecimalDigits . DecimalDigitsopt ExponentPartopt . DecimalDigits ExponentPartopt DecimalDigits ExponentPartopt DecimalDigits ::: DecimalDigit DecimalDigits DecimalDigit DecimalDigit ::: 以下之一 0 1 2 3 4 5 6 7 8 9 ExponentPart ::: ExponentIndicator SignedInteger ExponentIndicator ::: 以下之一 e E SignedInteger ::: DecimalDigits + DecimalDigits - DecimalDigits HexIntegerLiteral ::: 0x HexDigit 0X HexDigit HexIntegerLiteral HexDigit HexDigit ::: 以下之一 0 1 2 3 4 5 6 7 8 9 a b c d e f A B C D E F 表达式
PrimaryExpression : this Identifier Literal ArrayLiteral ObjectLiteral ( Expression ) ArrayLiteral : [ Elisionopt ] [ ElementList ] [ ElementList , Elisionopt ] ElementList : ElisionoptAssignmentExpression ElementList , ElisionoptAssignmentExpression Elision : , Elision , ObjectLiteral : { } { PropertyNameAndValueList } { PropertyNameAndValueList , } PropertyNameAndValueList : PropertyAssignment PropertyNameAndValueList , PropertyAssignment PropertyAssignment : PropertyName : AssignmentExpression get PropertyName() { FunctionBody } set PropertyName( PropertySetParameterList ) { FunctionBody } PropertyName : IdentifierName StringLiteral NumericLiteral PropertySetParameterList : Identifier MemberExpression : PrimaryExpression FunctionExpression MemberExpression [ Expression ] MemberExpression . IdentifierName new MemberExpression Arguments NewExpression : MemberExpression new NewExpression CallExpression : MemberExpression Arguments CallExpression Arguments CallExpression [ Expression ] CallExpression . IdentifierName Arguments : ( ) ( ArgumentList ) ArgumentList : AssignmentExpression ArgumentList , AssignmentExpression LeftHandSideExpression : NewExpression CallExpression PostfixExpression : LeftHandSideExpression LeftHandSideExpression [ 此处无换行 ] ++ LeftHandSideExpression [ 此处无换行 ] -- UnaryExpression : PostfixExpression delete UnaryExpression void UnaryExpression typeof UnaryExpression ++ UnaryExpression -- UnaryExpression + UnaryExpression - UnaryExpression ~ UnaryExpression ! UnaryExpression MultiplicativeExpression : UnaryExpression MultiplicativeExpression * UnaryExpression MultiplicativeExpression / UnaryExpression MultiplicativeExpression % UnaryExpression 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 RelationalExpressionNoIn : ShiftExpression RelationalExpressionNoIn < ShiftExpression RelationalExpressionNoIn > ShiftExpression RelationalExpressionNoIn <= ShiftExpression RelationalExpressionNoIn >= ShiftExpression RelationalExpressionNoIn instanceof ShiftExpression EqualityExpression : RelationalExpression EqualityExpression == RelationalExpression EqualityExpression != RelationalExpression EqualityExpression === RelationalExpression EqualityExpression !== RelationalExpression EqualityExpressionNoIn : RelationalExpressionNoIn EqualityExpressionNoIn == RelationalExpressionNoIn EqualityExpressionNoIn != RelationalExpressionNoIn EqualityExpressionNoIn === RelationalExpressionNoIn EqualityExpressionNoIn !== RelationalExpressionNoIn BitwiseANDExpression : EqualityExpression BitwiseANDExpression & EqualityExpression BitwiseANDExpressionNoIn : EqualityExpressionNoIn BitwiseANDExpressionNoIn & EqualityExpressionNoIn BitwiseXORExpression : BitwiseANDExpression BitwiseXORExpression ^ BitwiseANDExpression BitwiseXORExpressionNoIn : BitwiseANDExpressionNoIn BitwiseXORExpressionNoIn ^ BitwiseANDExpressionNoIn BitwiseORExpression : BitwiseXORExpression BitwiseORExpression | BitwiseXORExpression BitwiseORExpressionNoIn : BitwiseXORExpressionNoIn BitwiseORExpressionNoIn | BitwiseXORExpressionNoIn LogicalANDExpression : BitwiseORExpression LogicalANDExpression && BitwiseORExpression LogicalANDExpressionNoIn : BitwiseORExpressionNoIn LogicalANDExpressionNoIn && BitwiseORExpressionNoIn LogicalORExpression : LogicalANDExpression LogicalORExpression || LogicalANDExpression LogicalORExpressionNoIn : LogicalANDExpressionNoIn LogicalORExpressionNoIn || LogicalANDExpressionNoIn ConditionalExpression : LogicalORExpression LogicalORExpression ? AssignmentExpression : AssignmentExpression ConditionalExpressionNoIn : LogicalORExpressionNoIn LogicalORExpressionNoIn ? AssignmentExpressionNoIn : AssignmentExpressionNoIn AssignmentExpression : ConditionalExpression LeftHandSideExpression AssignmentOperator AssignmentExpression AssignmentExpressionNoIn : ConditionalExpressionNoIn LeftHandSideExpression AssignmentOperator AssignmentExpressionNoIn AssignmentOperator : 以下之一 = *= /= %= += -= <<= >>= >>>= &= ^= |= Expression : AssignmentExpression Expression , AssignmentExpression ExpressionNoIn : AssignmentExpressionNoIn ExpressionNoIn , AssignmentExpressionNoIn 语句
Statement : Block VariableStatement EmptyStatement ExpressionStatement IfStatement IterationStatement ContinueStatement BreakStatement ReturnStatement WithStatement LabelledStatement SwitchStatement ThrowStatement TryStatement DebuggerStatement Block : { StatementListopt } StatementList : Statement StatementList Statement VariableStatement : var VariableDeclarationList ; VariableDeclarationList : VariableDeclaration VariableDeclarationList , VariableDeclaration VariableDeclarationListNoIn : VariableDeclarationNoIn VariableDeclarationListNoIn , VariableDeclarationNoIn VariableDeclaration : Identifier Initialiseropt VariableDeclarationNoIn : Identifier InitialiserNoInopt Initialiser : = AssignmentExpression InitialiserNoIn : = AssignmentExpressionNoIn EmptyStatement : ; ExpressionStatement : [lookahead ∉ {{, function}]Expression ; IfStatement : if ( Expression ) Statement else Statement if ( Expression ) Statement IterationStatement : do Statement while ( Expression ); while ( Expression ) Statement for ( ExpressionNoInopt; Expressionopt ; Expressionopt ) Statement for ( var VariableDeclarationListNoIn; Expressionopt ; Expressionopt ) Statement for ( LeftHandSideExpression in Expression ) Statement for ( var VariableDeclarationNoIn in Expression ) Statement ContinueStatement : continue [ 此处无换行 ]Identifieropt ; BreakStatement : break [ 此处无换行 ]Identifieropt ; ReturnStatement : return [ 此处无换行 ]Expressionopt ; WithStatement : with ( Expression ) Statement SwitchStatement : switch ( Expression ) CaseBlock CaseBlock : { CaseClausesopt } { CaseClausesoptDefaultClause CaseClausesopt } CaseClauses : CaseClause CaseClauses CaseClause CaseClause : case Expression : StatementListopt DefaultClause : default : StatementListopt LabelledStatement : Identifier : Statement ThrowStatement : throw [noLineTerminator here] Expression ; TryStatement : try Block Catch try Block Finally try Block Catch Finally Catch : catch ( Identifier ) Block Finally : finally Block DebuggerStatement : debugger ; 函数和程序
FunctionDeclaration : function Identifier ( FormalParameterListopt ) { FunctionBody } FunctionExpression : function Identifieropt ( FormalParameterListopt ) { FunctionBody } FormalParameterList : Identifier FormalParameterList , Identifier FunctionBody : SourceElementsopt Program : SourceElementsopt SourceElements : SourceElement SourceElements SourceElement SourceElement : Statement FunctionDeclaration 统一资源定位符字符分类
uri ::: uriCharactersopt uriCharacters ::: uriCharacter uriCharactersopt uriCharacter ::: uriReserved uriUnescaped uriEscaped uriReserved ::: 以下之一 ; / ? : @ & = + $ , uriUnescaped ::: uriAlpha DecimalDigit uriMark uriEscaped ::: % HexDigit HexDigit uriAlpha ::: 以下之一 a b c d e f g h i j k l m n o p q r s t u v w x y z A B C D E F G H I J K L M N O P Q R S T U V W X Y Z uriMark ::: 以下之一 - _ . ! ~ * ‘ ( ) 正则表达式
Pattern :: Disjunction Disjunction :: Alternative Alternative | Disjunction Alternative :: [ 空 ] 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 ) PatternCharacter :: SourceCharacter 但非以下之一 : ^ $ \ . * + ? ( ) [ ] { } | AtomEscape :: DecimalEscape CharacterEscape CharacterClassEscape CharacterEscape :: ControlEscape c ControlLetter HexEscapeSequence UnicodeEscapeSequence IdentityEscape ControlEscape :: 以下之一 f n r t v ControlLetter :: 以下之一 a b c d e f g h i j k l m n o p q r s t u v w x y z A B C D E F G H I J K L M N O P Q R S T U V W X Y Z IdentityEscape :: SourceCharacter but not IdentifierPart DecimalEscape :: DecimalIntegerLiteral [lookahead ∉ DecimalDigit] CharacterClassEscape :: 以下之一 d D s S w W 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 但非以下之一 \ 或 ] 或 - \ ClassEscape ClassEscape :: DecimalEscape b CharacterEscape CharacterClassEscape JSON
JSON词法
JSONWhiteSpace :: <TAB> <CR> <LF> <SP> JSONString :: " JSONStringCharactersopt " JSONStringCharacters :: JSONStringCharacter JSONStringCharactersopt JSONStringCharacter :: SourceCharacter 但非 双引号 " 或反斜杠 \ 或 U+0000 抑或是 U+001F \ JSONEscapeSequence JSONEscapeSequence :: JSONEscapeCharacter UnicodeEscapeSequence JSONEscapeCharacter :: 以下之一 " / \ b f n r t JSONNumber :: -optDecimalIntegerLiteral JSONFractionopt ExponentPartopt JSONFraction :: . DecimalDigits JSONNullLiteral :: NullLiteral JSONBooleanLiteral :: BooleanLiteral JSON语法
JSONText : JSONValue JSONValue : JSONNullLiteral JSONBooleanLiteral JSONObject JSONArray JSONString JSONNumber JSONObject : { } { JSONMemberList } JSONMember : JSONString : JSONValue JSONMemberList : JSONMember JSONMemberList , JSONMember JSONArray : [ ] [ JSONElementList ] JSONElementList : JSONValue JSONElementList , JSONValue以上内容是否对您有帮助：
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