rest-params-trailing-comma-early-error.js (2104B)
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-expr-async-meth.template 5 /*--- 6 description: It's a syntax error if a FunctionRestParameter is followed by a trailing comma (class expression async method) 7 esid: sec-class-definitions-runtime-semantics-evaluation 8 flags: [generated] 9 negative: 10 phase: parse 11 type: SyntaxError 12 info: | 13 ClassExpression : class BindingIdentifieropt ClassTail 14 15 1. If BindingIdentifieropt is not present, let className be undefined. 16 2. Else, let className be StringValue of BindingIdentifier. 17 3. Let value be the result of ClassDefinitionEvaluation of ClassTail 18 with argument className. 19 [...] 20 21 14.5.14 Runtime Semantics: ClassDefinitionEvaluation 22 23 21. For each ClassElement m in order from methods 24 a. If IsStatic of m is false, then 25 i. Let status be the result of performing 26 PropertyDefinitionEvaluation for m with arguments proto and 27 false. 28 [...] 29 30 Runtime Semantics: PropertyDefinitionEvaluation 31 32 AsyncMethod : async PropertyName ( UniqueFormalParameters ) { AsyncFunctionBody } 33 34 1. Let propKey be the result of evaluating PropertyName. 35 2. ReturnIfAbrupt(propKey). 36 3. If the function code for this AsyncMethod is strict mode code, let strict be true. Otherwise 37 let strict be false. 38 4. Let scope be the LexicalEnvironment of the running execution context. 39 5. Let closure be ! AsyncFunctionCreate(Method, UniqueFormalParameters, AsyncFunctionBody, 40 scope, strict). 41 [...] 42 43 44 Trailing comma in the parameters list 45 46 14.1 Function Definitions 47 48 FormalParameters[Yield, Await] : 49 [empty] 50 FunctionRestParameter[?Yield, ?Await] 51 FormalParameterList[?Yield, ?Await] 52 FormalParameterList[?Yield, ?Await] , 53 FormalParameterList[?Yield, ?Await] , FunctionRestParameter[?Yield, ?Await] 54 ---*/ 55 $DONOTEVALUATE(); 56 57 var C = class { 58 static async method(...a,) { 59 60 } 61 };