| // This file was procedurally generated from the following sources: |
| // - src/dstr-binding/ary-ptrn-rest-obj-id.case |
| // - src/dstr-binding/default/async-gen-func-decl-dflt.template |
| /*--- |
| description: Rest element containing an object binding pattern (async generator function declaration (default parameter)) |
| 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. |
| [...] |
| ---*/ |
| |
| |
| var callCount = 0; |
| async function* f([...{ length }] = [1, 2, 3]) { |
| assert.sameValue(length, 3); |
| callCount = callCount + 1; |
| }; |
| f().next().then(() => { |
| assert.sameValue(callCount, 1, 'invoked exactly once'); |
| }).then($DONE, $DONE); |