| // This file was procedurally generated from the following sources: |
| // - src/dstr-binding/ary-ptrn-rest-ary-elem.case |
| // - src/dstr-binding/default/async-gen-func-decl.template |
| /*--- |
| description: Rest element containing an array BindingElementList pattern (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 |
| |
| BindingRestElement : ... BindingPattern |
| |
| 1. Let A be ArrayCreate(0). |
| [...] |
| 3. Repeat |
| [...] |
| b. If iteratorRecord.[[done]] is true, then |
| i. Return the result of performing BindingInitialization of |
| BindingPattern with A and environment as the arguments. |
| [...] |
| |
| 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, 3); |
| assert.sameValue(y, 4); |
| assert.sameValue(z, 5); |
| callCount = callCount + 1; |
| }; |
| f([3, 4, 5]).next().then(() => { |
| assert.sameValue(callCount, 1, 'invoked exactly once'); |
| }).then($DONE, $DONE); |