// |reftest| async // This file was procedurally generated from the following sources: // - src/dstr-binding/ary-ptrn-elem-id-iter-val.case // - src/dstr-binding/default/async-gen-func-decl.template /*--- description: SingleNameBinding when value iteration was completed previously (async generator function declaration) esid: sec-asyncgenerator-definitions-instantiatefunctionobject features: [async-iteration] flags: [generated, async] info: | AsyncGeneratorDeclaration : async [no LineTerminator here] function * BindingIdentifier ( FormalParameters ) { AsyncGeneratorBody } [...] 3. Let F be ! AsyncGeneratorFunctionCreate(Normal, FormalParameters, AsyncGeneratorBody, scope, strict). [...] 13.3.3.6 Runtime Semantics: IteratorBindingInitialization SingleNameBinding : BindingIdentifier Initializeropt [...] 4. If iteratorRecord.[[done]] is false, then a. Let next be IteratorStep(iteratorRecord.[[iterator]]). b. If next is an abrupt completion, set iteratorRecord.[[done]] to true. c. ReturnIfAbrupt(next). d. If next is false, set iteratorRecord.[[done]] to true. e. Else, [...] i. Let v be IteratorValue(next). ii. If v is an abrupt completion, set iteratorRecord.[[done]] to true. iii. ReturnIfAbrupt(v). 5. If iteratorRecord.[[done]] is true, let v be undefined. [...] 8. Return InitializeReferencedBinding(lhs, v). ---*/ var callCount = 0; async function* f([x, y, z]) { assert.sameValue(x, 1); assert.sameValue(y, 2); assert.sameValue(z, 3); callCount = callCount + 1; }; f([1, 2, 3]).next().then(() => { assert.sameValue(callCount, 1, 'invoked exactly once'); }).then($DONE, $DONE);