Ecma-262 edition 6(ECMAScript® 2015 Language Specification)

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ECMAScript® 2015 Language Specification(Javascript语言规范 2015);英文;pdf格式
●ecma INTERNATIONAL COPYRIGHT NOT/CE c 2015 Ecma international This document may be copied, published and distributed to others, and certain derivative works of it may be prepared, copied, published, and distributed, in whole or in part, provided that the above copyright notice and this Copyright License and Disclaimer are included on all such copies and derivative works. The only derivative works that are permissible under this Copyright License and Disclaimer are (works which incorporate all or portion of this document for the purpose of providing commentary or explanation(such as an annotated version of the document ( works which incorporate all or portion of this document for the purpose of incorporating features that provide accessibility (iii) translations of this document into languages other than English and into different formats and (iv) works by making use of this specification in standard conformant products by implementing(e.g by copy and paste wholly or partly) the functionality therein However, the content of this document itself may not be modified in any way, including by removing the copyright notice or references to Ecma International, except as required to translate it into languages other than English or into a different format The official version of an Ecma International document is the English language version on the Ecma International website. In the event of discrepancies between a translated version and the official version, the official version shall govern. The limited permissions granted above are perpetual and will not be revoked by Ecma Internat ional or its successors or assigns This document and the information contained herein is provided on an as / s basis and Ecma INTERNATIONAL DISCLAIMS ALL WARRANTIES. EXPRESS OR MPL/ED. INCLUDING BUT NOT LIMITED TO ANY WARRANTY THAT THE USE OF THE INFORMAT/ON HEREIN WILL NOT INFRINGE ANY OWNERSHIP R/GHTS OR ANY MPL/ED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE Software license All Software contained in this document ("Software )"is protected by copyright and is being made available under the BSD License", included below. This Sottware may be subject to third party rights (rights from parties other than Ecma International), including patent rights, and no licenses under such third party rights are granted under this license even if the third party concerned is a member of Ecma International. SEE THE ECMA CODE OF CONDUCT IN PATENT MatterSAvaiLableAthttp://www.ecma-international.org/memento/codeofconduct.htmForInFormaTion REGARDING THE LICENSING OF PATENT CLAIMS THAT ARE REQUIRED TO IMPLEMENT ECMA INTERNATIONAL STANDARDS Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met. 1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer 2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution 3. Neither the name of the authors nor Ecma International may be used to endorse or promote products derived from this software without specific prior written permission THIS SOFTWARE S PROVIDED BY THE ECMA INTERNATIONAL"AS S AND ANY EXPRESS OR MPLIED WARRANTIES. INCLUDING. BUT NOT LIMITED TO. THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. N NO EVENT SHALL ECMA INTERNATIONAL BE LIABLE FOR ANY DIRECT INDIRECT INCIDENTAL. SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES:: LOSS OF USE, DATA, OR PROFITS: OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHE THER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE O Ecma International 2015 ●ecna INTERNATIONAL ◎ Ecma Internationa|201 ●ecma INTERNATIONAL Contents Page Scope Conformance Normative references Overview 4.1 Web scripting ■■■■■■■■■国国量国国■国国国国国■国■量国国国量国国国国国国国国■国■国量国国国国■国面111面111111重 4.2 ECMAScript Overview,…,,…,…,,…,,…,,…,,…,,…,…,,…,,…,,…,…,…,…,,…,…,…2 4.2.1 Objects.,…,… ■■■■■■■■■■■■■■■■■■■国国■国■国国国国国国■国国量国■国■量■国国国国国国国国国国国国国国国国国』国国■国国量国国国国国■ 4.2.2 The strict Variant of ECMAScript…,…,…,…,…,…, 4.3 Terms and definitions……5 4.4 Organization of This Specification Notational conventions 5.1 Syntactic and Lexical Grammars 5.1.1 Context-Free Grammars 512 The Lexical and regExp Grammars……,…,…,…,…,…,… 1.3 The Numeric String Grammar 5.1.4 The Syntactic Grammar 5.1.5 Grammar notation 5.2 Algorithm Conventions 14 5.3 Static Semantic Rules ECMAScript Data Types and values…,…,…,…,,…,,… 16 6.1 ECMAScript Language Types ∴16 6.1.1 The Undefined Type,,,,…,…,…,…,…,…,…,…,,,…, 16 6.1.2 The Null Type 6.1.3 The Boolean Type 6.1. 4 The String Type 17 6.1.5 The Symbol Type..….….…….,…,…,… 6.1.6 The Number Type 18 6.1.7 he object Type…,….,….… 19 6.2 ECMAScript Specification Types.…… 29 6.2.1 The List and Record Specification Type 6.2.2 The Completion Record Specification Type….….…..….….….…..….…..…..…..… 30 623 The Reference Specification Type……… 6. 2. 4 The Property Descriptor Specification Type 33 6.2.5 The Lexical Environment and Environment Record Specification Types... .35 6.2, 6 Data blocks 35 Abstract Operations Type Conversion 36 71.1 ToPrimitive( input[, PreferredType])………………… 36 7.1.2 ToBoolean( argument 37 7.1.3 ToNumber( argument 38 7.1.4 Tolnteger( argument)…… 7.1.5 Tolnt32( argument 0 716 ToUint32( argument)…,,,…, ■国■国国国国国国国国国国■ ,41 7.1.7 Tolnt16( argument 41 718 ToUint16( argument)…,…,…,…,…,…,…,…,…,…,…,…,…,…,…,…,…,,41 7.1. 9 Tolnt8 argument) 41 7.1.10 ToUint8( argument 42 7.1.11 ToUint8Clamp( argument 42 71.12 ToString( argument)……,…,…,,…,…,…,…,…,…,…,…,…,…,,…,…,…,,……,42 O Ecma International 2015 ●ecna INTERNATIONAL 7.1.13 Toobject( argument)……………,…,…,…… 7.1.14 ToPropertyKey( argument 7.1.15 ToLength( argument). 44 7.1.16 CanonicalNumericlndexString〔 argument)………,…,…,…,…,…,…,…,…, Testing and comparison Operations 45 7,2.1 RequireObject coercible( argument)……………45 7.22 IsArray( argument)…… 45 7. 2. 3 Is Callable( argument ). 7.2.4 CoNstructor( argument)…… 45 72.5 eXtensible(O)… 7.2.6 IsInteger( argument )... 46 7 lsProperty Key( argument 46 28| rEgeXp( argument)………,,…,…, 46 7.29 Samevalue(x,y)… 1■量量 46 7210 Same valuezero(X,y)…… 46 72.11 Abstract Relational comparison,,,…,…,…,…,…,…,…,…,…,…,…,…,…,,…,47 7212 Abstract Equality C。 mparison,,…,,…,,…,,… 72.13 Strict Equality Comparison,,,…,…,…,…,…,…,…,…,…,, 1■量量 73 Operations on objects……,…,…,…,…,…,…,…,…,…,…,…,…,…,… 49 7.31Get(o,P)… 49 732Gev(V,P)… :::::::::::::::::::·::::::::·:·:::·::::::::·::::··::::·::·:::·· 49 733Set(o,P,V, Throw)………,…,…,…,, 49 7.3.4 Create Property(o, P,v) 49 73.5 CreateMethod Property(o,P,V)……,…,…,…,…,…,…,,…,…,…,…,……,………50 3.6 Create Data PropertyOrThrow(o,P,V)……,…,…,…,…,…,……,…,…,…,……………………50 7.3.7 Define PropertyOrThrow(O, P, desc) ■量量国国a量量国a量国国a量国国量 7. 8 Delete PropertyOrThrow(o, P).m.eeeC 73.9 GetMethod(O,P)……, ■■日■日■■日■日日国』国国量国』国国国国量国国国国量量国日量量国国国量国国 51 73.10 HasProperty(o,P)………,…,…,…,…,…,…,…,…,…,…,…,…,…,…………………51 7.3. 11 HasOwnProperty(o, P).. 51 7312ca(F,V,[ argumentsList])…,,,… 51 7.3.13 Construct(F, [arguments List], InewTarget]) ■■国量量国国国量量国国量量国aa正1重 7. 3.14 Setlntegrity Level (o, level) 7315 Testlntegrity Level(o, level)…………,……,…,…,………,……………52 7.3.16 Create Array FromList(elements) 52 7.3.17 CreateListFrom ArrayLike(obj [ elementT ypes]) 7.3.18 Invoke(o, P, [argumentsList]) 53 7.3.19 OrdinaryHasInstance(C,O)..…,…,… 73.20 Species Constructor(o, defaultConstructor)……,……,…,……,…, 7.3. 21 Enumerable OwnNames(o) 7322 GetFunction Realm(obj)…………………,…,…,……,…,…,…,… 54 Operations on Iterator objects 4 Getlterator(obj, method)….,….,.,…,,…,,…,,…,…,…,…,… ∴55 4.2 IteratorNext( iterator, value 7.4.3 Iterator Complete( iterResult 55 7.4.4 Iterator Value( iterResult ∴55 7.4.5 Iterator Step( iterator 55 74.6 Iteratorclose( iterator, completion)…………………55 7.4.7 CreatelterResultobject( value, done 56 7. 4.8 CreateListlterator( list 56 8 Executable Code and execution Contexts 56 8.1 Lexical environments 56 8.1.1 Environment records 57 8.12 Lexical Environment Operations 71 8.2 Code realms 72 8. 2. 1 CreateRealmo 73 8.2.2 Createlntrinsics( realmRec 73 8.2.3 SetRealmGlobalobject( realmRec, globalobj) 824 SetDefaultGlobal Bindings( realmRec)…………,…,…,…,…,…,…,…,…,…,…,…,…,………,73 ◎ Ecma Internationa|201 ●ecma INTERNATIONAL 8.3 Execution Contexts 74 8.3.1 Resolve Binding( name, [env]) 175 8.3.2 GetThisEnvironment().. 75 833 Resolve This Binding()…… 75 834 GetNewTarget()… 75 8.3.5 GetGlobalobject 76 8.4 Jobs and Job queues ∴76 841 EnqueueJob( queueName,job, arguments)……….….….…. 8.4.2 Nextjob result 8.5 ECMAScript Initialization()…,…,… 8.5.1 InitializehostDefinedrealn( realm)……… ∴78 Ordinary and Exotic Objects Behaviours………… 78 9 Ordinary object Internal Methods and Internal slots 78 9.1.1 I[GetPrototypeof]() 78 9.1. 2 [[SetPrototypeof](v) 78 9.1.3 [[IsExtensiblel1o) 79 9.1.4 [[Prevent ExtensionsJ1o 79 91.5[ GetOn Property](P)…… 79 91.6[ DefineOwn Property]P,Desc)…,,,,,…,…,…,, ∴79 91.7[ HasProperty](P)…… 81 9.1.8[Get](P, Receiver)…,…,…,…,…,…,…,…,…,…,…,…,…, 81 919[set](P,V, Receiver)…,,…,…,…,, 81 91.10[ Delete](P)…… 82 [[]]o 9.1.12 [[Own Property]() 日日■B日日■日日 83 9.1.13 ObjectCreate(proto, internalslots List)..... 83 9.1.14 Ordinary Create FromConstructor( constructor, intrinsic DefaultProto, internalSlotsList)].83 9.1.15 GetPrototypeFromConstructor( constructor, intrinsicDefaultProto ∴4 92 CMAScript Function Objects 84 9.2.1 [[Calll]( this Argument, arguments List)... 85 9,2.2 Construc切( arguments List,, newTarget)………,,…,…,…,…,… 86 9.2.3 Function Allocate(functionPrototype, strict [,function Kind]) ∴87 924 Functioninitialize(F,kind, ParameterList, Body, Scope)………,…, ■国国国1面 ∴87 9.2.5 Function Create(kind ParameterList, Body, Scope, Strict, prototype) 88 926 Generator Function create(kind, ParameterList,Body, Scope, Strict).…,,…,…,,……,!8 9.2.7 AddRestricted FunctionProperties(F, realm 88 928 Make Constructor(F, writable Prototype, prototype)…………………………88 9. 2.9 Make ClassConstructor(F) 89 9.2.10 MakeMethod( f, homeobject). 89 9.211 SetFunction name(F,name, prefix)…,… ,89 9.2.12 Function DeclarationInstantiation(func, arguments List) 89 Built- in Function Objects.…,…,…… 9.3.1 [[Calll( thisArgument, argumentsList 92 3.2 [[Construct]](argumentsList, newTarget) 93 9.3.3 Create Builtin Function (realm, steps, prototype, internalslots List) 93 9.4 Built-in Exotic Object Internal Methods and Slots 93 9.4.1 Bound Function Exotic objects 93 9.4.2 Array Exotic Objects 95 9.4.3 String Exotic objects ∴97 9. 4.4 Arguments Exotic Objects 98 9. 4.5 Integer Indexed Exotic Objects. 102 9.4.6 Module namespace exotic objects 105 9.5 Proxy object Internal Methods and Internal slots 108 9.5.1 I[GetPrototypeofJ]0 109 9.5.2 [[SetPrototypeof]v) 109 [[lsExtensibleJ]o 110 9.54 [PreventExtensions]IO 9.5.5 [[Getown Property](P) 111 9.5.6[ DefineOwn Property]](P,Desc)…,…,…,…,…, O Ecma International 2015 ●ecma INTERNATIONAL 9.5.7 [CHasProperty(P) 112 9.58 [[Get](P, Receiver) 113 9.5.9 [[SetI(P, V, Receiver) 113 9.5.10 [[Deletell(P) 114 9.511[ [Enumerate]]0)…… 114 9.5.12 [[OwnProperty KeysJ1o 14 9.5.13 [[Call](thisArgument, argumentsList) 115 9.5.14 [[Construct]]( argumentsList, new Target).........................116 9.5. 15 Proxy Create(target, handler) 116 ECMAScript Language: Source code 116 10.1 Source Text 116 10.1.1 Static Semantics: UTF16Encoding( cp) 117 0.1.2 Static Semantics: UTF16Decode( lead trail 117 10.2 Types of Source Code .117 10.2.1 Strict Mode code 118 10.2.2Non- ECMAScript Functions……………,…,…,…,…,…………… 118 11 ECMAScript Language: Lexical grammar……………………118 11.1 Unicode Format-Control characters 119 11.2 White Space…,…,…,…,…,…,…,…,…,…,…,…,…,…,…,…,…,…,120 Line terminators 121 11 Comments∴…………………121 Tokens…n 122 11.6 Names and Keywords…,…,…,…,…,…,…,…,…,…,…,…,…,…,…,…,…,,……………122 11.6.1 dentifier names 123 11.6.2 Reserved words 124 Punctuators 125 118 Literals…mm…,… 125 11.8.1 Null Literals 125 11.8.2 Boolean Literals 125 11.8.3 Numeric literals 125 1.84 String Literals…,…,…,…,…,…,…,…, 128 11.8.5 Regular Expression Literals…,,,…, ∴131 1.8.6 Template Literal Lexical Components.. 132 11.9 Automatic 11.9.1 Rules of automatic semicolon 11.92 Examples of Automatic Semicolon Insertion…,,…,…,…,…,…,…,…,…,…,…,…136 ECMAScript Language: Expressions…… 137 12.1 Identifiers ∴137 12.1.1 Static Semantics: Early Errors.m. 137 12.1.2 Static Semantics: BoundNames 138 12.1.3 Static Semantics: IsValid SimpleAssignmentTarget ∴138 12.1. 4 Static Semantics: String value.seem.. 138 12.1.5 Runtime Semantics: BindingInitialization.. 138 12.1.6 Runtime semantics: Evaluation 139 12.2 Primary Expression 139 12.2.1 Semantics… 140 12.2.2 The this keyword... 141 12.2.3 dentifier reference 141 12.24 Literals 141 12.2.5 Array Initial 142 12.2.6 Object Initializer. ,144 12.2.7 Function Defining Expressions 148 228 Regular Expression Literals…,…,,…,…,…,…,…,…,…,…,…,…,…,,…,…,148 12.2.9 Template Literals…,…,,…, 148 2.2.10 The Grouping Operator…,…,…,…,…, 152 12.3 Left凵 Hand-Side Expressions…… 153 12.3.1 Static Semantics 153 12.3.2Pr。 perty Accessors.…,… 156 ◎ Ecma Internationa2015 ●ecna INTERNATIONAL 12.3.3 The new Operator 157 12.3. 4 Function callls 157 123.5 The super Keyword…,…,,…,…,…,…,…,…,…, 159 123.6 Argument Lists……,…,…,…,…,…,…,…,…,…,…,…,…,…,… 160 123.7 Tagged Templates…,,…,…,…,…,…,… 160 12.3.8 Meta Properties.a....a. 161 124 Postfix Expressions,,…,…,, 161 124.1 Static Semantics: Early Errors,,…,,,…,,,,…,…,161 12.42 Static Semantics: sFunction Definition ∴161 1243 Static Semantics: Is ValidsimpleAssignmentTarget…,,…,…,…,…,,…,161 1244 Postfix Increment Operator…,…,…,…,, 162 124.5 Postfix Decrement Operator,,…,…,… 162 125 Unary Operators…,,…,…, 162 12.5.1 Static Semantics: Early Errors. 162 12.5.2 Static semantics: IsFunction Definition,,,,…,……… 162 12.5.3 Static Semantics: Is ValidSimpleAssignmentTarget ∴…163 12.5.4 The de1 ete Operator…,…,…,…,…,…,…,,…,…,,…,…,…,…163 12.5.5 The void Operator 164 12.5.6 The typeof Operator .164 12.5.7 Prefix Increment Operator 165 12.5.8 Prefix Decrement Operator 165 12.5. 9 Unary + Operator 165 125.10 Unary- Operator.…,…,…,,…,,…,,…,…,…,…,…,…,…,…,…,……………,165 125.11 Bitwise NOT Operator(~)…,…,,…,…,…,…,,…,…,…,,,,…,…,…,,…,,…,……,…,…166 12.5.12 Logical NOT Operator(! 166 12.6 Multiplicative Operators…… 166 12.6 Static semantics: sFunction Definition 12.6.2 Static Semantics: IsValidSimpleAssignmentTarget 166 126.3 Runtime semantics: Evaluation 166 12.7 Additive Operators 168 12.7.1 Static Semantics: IsFunction Definition 168 12.7.2 Static Semantics: Is Valid SimpleAssignmentTarget 168 1273 The Addition operator(+)…… 12.7.4 The Subtraction Operator(-) 169 127.5 Applying the Additive Operators to Numbers…,…,…,…,…,…,…,…,…,…,,…,169 128 Bitwise Shift Operators,,…,…,…,, 170 128.1 Static Semantics: sFunction Definition 170 12.8.2 Static Semantics: IsValidSimpleAssignmentTarget ∴170 12.8.3 The Left Shift Operator(<<) 170 12.8.4 The signed right shift Operator(>>) 171 128.5 The Unsigned Right Shift Operator(>>>)…,…,…,…,…… 12.9 Relational operators .ama... 172 12.9.1 Static Semantics: sFunction Definition ,172 12.9.2 Static Semantics: Is Valid SimpleAssignmentTarget ∴172 12.9.3 Runtime Semantics: Evaluation 172 12.9.4 Runtime Semantics: InstanceofOperator(o, c) 174 12. 10 Equality operators 174 12.10.1 Static Semantics: IsFunction Definition 174 12.10.2 Static Semantics: Is ValidsimpleAssignmentTarget 174 12.10.3 Runtime Semantics: Evaluation 174 12.11 Binary Bitwise Operators 176 12.11.1 Static Semantics: Is Function Definition 176 12.11.2 Static semantics: Is simpleAssignmentTarget 176 12.11.3 Runtime Semantics Evaluation 176 12.12 Binary Logical operators 12.12.1 Static semantics: sFunction Definition 177 12.12.2 Static semantics: Is simpleAssignmentTarget 12.12.3 Runtime semantics: Evaluation ∴177 O Ecma International 2015 ●ecma INTERNATIONAL 12.13 Conditional Operator(?:)……….… 178 12.13.1 Static Semantics: sFunction Definition 178 12.13.2 Static Semantics: IsValid SimpleAssignmentTarget 178 12.13.3 Runtime semantics: Evaluation∴… 178 12.14 Assignment Operators. ■■■■■■ 178 12.14.1 Static Semantics: Early Errors 179 12.14.2 Static Semantics: sFunction Definition 179 12.14.3 Static Semantics: IsValid Simple AssignmentTarget 179 12.14.4 Runtime Semantics: Evaluation 179 12.14.5 Destructuring Assignment 180 215 Comma Operator(,)…,,,…,…,…,…… 185 12, 15.1 Static Semantics 12152 Static semantics: IsValid simpleAssignmentTarget,,…,…,,,,…,,…,,…,,…,185 12.15.3 Runtime semantics: Evaluation 186 ECMAScript Language: Statements and Declarations 186 13.1 Statement Semantics 186 13.1.1 Static Semantics: ContainsDuplicate Labels 186 13.1.2 Static Semantics: ContainsUndefined BreakTarget 187 13.1.3 Static Semantics: ContainsUndefined Continue Target 13.1.4 Static Semantics: Declaration Part 187 13.1.5 Static Semantics: varDeclaredNames 188 13.1.6 Static Semantics: VarScoped Declarations 188 13.1.7 Runtime semantics: Labelled evaluation 188 13.18 Runtime semantics: Evaluation 188 13.2 Block ∴189 13.2.1 Static semantics: Early Errors……… 189 13.2.2 Static Semantics: ContainsDuplicate Labels 189 13.2.3 Static Semantics: ContainsUndefinedBreakTarget 189 13.2.4 Static Semantics: ContainsUndefined Continue Target 190 13.2.5 Static Semantics: Lexically DeclaredNames ∴190 13.2.6 Static Semantics: Lexicallyscoped Declarations 190 132.7 Static semantics: TopLevelLexically DeclaredNames.…………… 191 13.2.8 Static Semantics: TopLevelLexically Scoped Declarations 191 13.2.9 Static Semantics: TopLevelvarDeclaredNames 192 13.2.10 Static Semantics: TopLevelvarScoped Declarations 192 13.2.11 Static Semantics VarDeclared Names 192 13.2.12 Static Semantics: VarScoped Declarations 193 13.2.13 Runtime Semantics: Evaluation 193 13. 2.14 Runtime Semantics: BlockDeclarationInstantiation( code, env) 194 13.3 Declarations and the variable statement 194 13 3.1 Let and const declarations 194 13.3.2 Variable statement ■■■■■■■■■■■■■■国国国国国国1国 196 13.3.3 Destructuring Binding Patterns. 198 134 Empty Statementat 205 13, 4.1 Runtime semantics: Evaluation 205 135 Expression statement 205 13.5.1 Runtime semantics: Evaluation 205 13.6 The if Statement .205 13.6.1 Static Semantics: Early Errors 205 13.6.2 Static Semantics: ContainsDuplicate labels 205 13.6.3 Static Semantics: ContainsUndefined BreakTarget 206 1364 Static Semantics: ContainsUndefinedContinueTarget,,…,,,…,,,…,,,…,……206 13. 6.5 Static Semantics: VarDeclaredNames 206 1366 Static Semantics: VarScoped Declarations,…,,,…,,,…,…,…,,,…,,…,………206 13. 6.7 Runtime 137 teration statements………………207 137.1 Semantics 13.7.2 The do-while Statement 208 VIll ◎ Ecma Internationa2015

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swmwlm 不错的资源。就是e文不好读呀。
2016-09-12
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fanshi200320 英文版,看的有些吃力啊!希望谁能搞个中文版的
2016-03-06
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