rest-params-trailing-comma-early-error.js (2023B)
1 // |reftest| error:SyntaxError 2 // This file was procedurally generated from the following sources: 3 // - src/function-forms/rest-params-trailing-comma-early-error.case 4 // - src/function-forms/syntax/cls-decl-async-meth.template 5 /*--- 6 description: It's a syntax error if a FunctionRestParameter is followed by a trailing comma (class declaration async method) 7 esid: sec-class-definitions-runtime-semantics-evaluation 8 flags: [generated] 9 negative: 10 phase: parse 11 type: SyntaxError 12 info: | 13 ClassDeclaration : class BindingIdentifier ClassTail 14 15 1. Let className be StringValue of BindingIdentifier. 16 2. Let value be the result of ClassDefinitionEvaluation of ClassTail with 17 argument className. 18 [...] 19 20 14.5.14 Runtime Semantics: ClassDefinitionEvaluation 21 22 21. For each ClassElement m in order from methods 23 a. If IsStatic of m is false, then 24 i. Let status be the result of performing 25 PropertyDefinitionEvaluation for m with arguments proto and 26 false. 27 [...] 28 29 Runtime Semantics: PropertyDefinitionEvaluation 30 31 AsyncMethod : async PropertyName ( UniqueFormalParameters ) { AsyncFunctionBody } 32 33 1. Let propKey be the result of evaluating PropertyName. 34 2. ReturnIfAbrupt(propKey). 35 3. If the function code for this AsyncMethod is strict mode code, let strict be true. Otherwise 36 let strict be false. 37 4. Let scope be the LexicalEnvironment of the running execution context. 38 5. Let closure be ! AsyncFunctionCreate(Method, UniqueFormalParameters, AsyncFunctionBody, 39 scope, strict). 40 [...] 41 42 43 Trailing comma in the parameters list 44 45 14.1 Function Definitions 46 47 FormalParameters[Yield, Await] : 48 [empty] 49 FunctionRestParameter[?Yield, ?Await] 50 FormalParameterList[?Yield, ?Await] 51 FormalParameterList[?Yield, ?Await] , 52 FormalParameterList[?Yield, ?Await] , FunctionRestParameter[?Yield, ?Await] 53 ---*/ 54 $DONOTEVALUATE(); 55 56 57 class C { 58 async method(...a,) { 59 60 } 61 }