| // This file was procedurally generated from the following sources: |
| // - src/dstr-binding/ary-ptrn-rest-ary-empty.case |
| // - src/dstr-binding/default/async-gen-meth.template |
| /*--- |
| description: Rest element containing an "empty" array pattern (async generator method) |
| esid: sec-asyncgenerator-definitions-propertydefinitionevaluation |
| features: [generators, async-iteration] |
| flags: [generated, async] |
| info: | |
| AsyncGeneratorMethod : |
| async [no LineTerminator here] * PropertyName ( UniqueFormalParameters ) |
| { AsyncGeneratorBody } |
| |
| 1. Let propKey be the result of evaluating PropertyName. |
| 2. ReturnIfAbrupt(propKey). |
| 3. If the function code for this AsyncGeneratorMethod is strict mode code, let strict be true. |
| Otherwise let strict be false. |
| 4. Let scope be the running execution context's LexicalEnvironment. |
| 5. Let closure be ! AsyncGeneratorFunctionCreate(Method, UniqueFormalParameters, |
| 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 |
| |
| ArrayBindingPattern : [ ] |
| |
| 1. Return NormalCompletion(empty). |
| |
| ---*/ |
| var iterations = 0; |
| var iter = function*() { |
| iterations += 1; |
| }(); |
| |
| |
| var callCount = 0; |
| var obj = { |
| async *method([...[]]) { |
| assert.sameValue(iterations, 1); |
| callCount = callCount + 1; |
| } |
| }; |
| |
| obj.method(iter).next().then(() => { |
| assert.sameValue(callCount, 1, 'invoked exactly once'); |
| }).then($DONE, $DONE); |