| // This file was procedurally generated from the following sources: |
| // - src/dstr-binding/obj-ptrn-prop-obj-init.case |
| // - src/dstr-binding/default/async-gen-func-expr-dflt.template |
| /*--- |
| description: Object binding pattern with "nested" object binding pattern using initializer (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). |
| [...] |
| |
| |
| 13.3.3.7 Runtime Semantics: KeyedBindingInitialization |
| |
| [...] |
| 3. If Initializer is present and v is undefined, then |
| a. Let defaultValue be the result of evaluating Initializer. |
| b. Let v be GetValue(defaultValue). |
| c. ReturnIfAbrupt(v). |
| 4. Return the result of performing BindingInitialization for BindingPattern |
| passing v and environment as arguments. |
| ---*/ |
| |
| |
| var callCount = 0; |
| var f; |
| f = async function*({ w: { x, y, z } = { x: 4, y: 5, z: 6 } } = { w: undefined }) { |
| assert.sameValue(x, 4); |
| assert.sameValue(y, 5); |
| assert.sameValue(z, 6); |
| |
| assert.throws(ReferenceError, function() { |
| w; |
| }); |
| callCount = callCount + 1; |
| }; |
| |
| f().next().then(() => { |
| assert.sameValue(callCount, 1, 'invoked exactly once'); |
| }).then($DONE, $DONE); |