| // This file was procedurally generated from the following sources: |
| // - src/dstr-binding/ary-ptrn-elem-ary-empty-iter.case |
| // - src/dstr-binding/default/async-gen-func-expr-dflt.template |
| /*--- |
| description: BindingElement with array binding pattern and initializer is not used (async generator function expression (default parameter)) |
| esid: sec-asyncgenerator-definitions-evaluation |
| features: [async-iteration] |
| flags: [generated, async] |
| info: | |
| AsyncGeneratorExpression : async [no LineTerminator here] function * ( FormalParameters ) { |
| AsyncGeneratorBody } |
| |
| [...] |
| 3. Let closure be ! AsyncGeneratorFunctionCreate(Normal, FormalParameters, |
| AsyncGeneratorBody, scope, strict). |
| [...] |
| |
| |
| 13.3.3.6 Runtime Semantics: IteratorBindingInitialization |
| |
| BindingElement : BindingPatternInitializer opt |
| |
| 1. If iteratorRecord.[[done]] is false, then |
| a. Let next be IteratorStep(iteratorRecord.[[iterator]]). |
| [...] |
| e. Else, |
| i. Let v be IteratorValue(next). |
| [...] |
| 4. Return the result of performing BindingInitialization of BindingPattern |
| with v and environment as the arguments. |
| ---*/ |
| var initCount = 0; |
| |
| |
| var callCount = 0; |
| var f; |
| f = async function*([[] = function() { initCount += 1; }()] = [[23]]) { |
| assert.sameValue(initCount, 0); |
| callCount = callCount + 1; |
| }; |
| |
| f().next().then(() => { |
| assert.sameValue(callCount, 1, 'invoked exactly once'); |
| }).then($DONE, $DONE); |