| // This file was procedurally generated from the following sources: |
| // - src/dstr-binding/ary-ptrn-rest-ary-rest.case |
| // - src/dstr-binding/default/async-gen-meth.template |
| /*--- |
| description: Rest element containing a rest element (async generator method) |
| esid: sec-asyncgenerator-definitions-propertydefinitionevaluation |
| features: [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. |
| [...] |
| ---*/ |
| var values = [1, 2, 3]; |
| |
| |
| var callCount = 0; |
| var obj = { |
| async *method([...[...x]]) { |
| assert(Array.isArray(x)); |
| assert.sameValue(x.length, 3); |
| assert.sameValue(x[0], 1); |
| assert.sameValue(x[1], 2); |
| assert.sameValue(x[2], 3); |
| assert.notSameValue(x, values); |
| |
| callCount = callCount + 1; |
| } |
| }; |
| |
| obj.method(values).next().then(() => { |
| assert.sameValue(callCount, 1, 'invoked exactly once'); |
| }).then($DONE, $DONE); |