ary-ptrn-rest-id-exhausted.js (1456B)
1 // |reftest| async 2 // This file was procedurally generated from the following sources: 3 // - src/dstr-binding/ary-ptrn-rest-id-exhausted.case 4 // - src/dstr-binding/default/async-gen-func-expr.template 5 /*--- 6 description: RestElement applied to an exhausted iterator (async generator function expression) 7 esid: sec-asyncgenerator-definitions-evaluation 8 features: [Symbol.iterator, async-iteration] 9 flags: [generated, async] 10 info: | 11 AsyncGeneratorExpression : async [no LineTerminator here] function * ( FormalParameters ) { 12 AsyncGeneratorBody } 13 14 [...] 15 3. Let closure be ! AsyncGeneratorFunctionCreate(Normal, FormalParameters, 16 AsyncGeneratorBody, scope, strict). 17 [...] 18 19 20 13.3.3.6 Runtime Semantics: IteratorBindingInitialization 21 BindingRestElement : ... BindingIdentifier 22 1. Let lhs be ResolveBinding(StringValue of BindingIdentifier, 23 environment). 24 2. ReturnIfAbrupt(lhs). 3. Let A be ArrayCreate(0). 4. Let n=0. 5. Repeat, 25 [...] 26 b. If iteratorRecord.[[done]] is true, then 27 i. If environment is undefined, return PutValue(lhs, A). 28 ii. Return InitializeReferencedBinding(lhs, A). 29 30 ---*/ 31 32 33 var callCount = 0; 34 var f; 35 f = async function*([, , ...x]) { 36 assert(Array.isArray(x)); 37 assert.sameValue(x.length, 0); 38 callCount = callCount + 1; 39 }; 40 41 f([1, 2]).next().then(() => { 42 assert.sameValue(callCount, 1, 'invoked exactly once'); 43 }).then($DONE, $DONE);