mirror of
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46 lines
1.4 KiB
JavaScript
46 lines
1.4 KiB
JavaScript
// This file was procedurally generated from the following sources:
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// - src/dstr-binding/obj-ptrn-id-init-skipped.case
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// - src/dstr-binding/default/async-gen-func-decl.template
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/*---
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description: Destructuring initializer is not evaluated when value is not `undefined` (async generator function declaration)
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esid: sec-asyncgenerator-definitions-instantiatefunctionobject
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features: [async-iteration]
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flags: [generated, async]
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info: |
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AsyncGeneratorDeclaration : async [no LineTerminator here] function * BindingIdentifier
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( FormalParameters ) { AsyncGeneratorBody }
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[...]
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3. Let F be ! AsyncGeneratorFunctionCreate(Normal, FormalParameters, AsyncGeneratorBody,
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scope, strict).
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[...]
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13.3.3.7 Runtime Semantics: KeyedBindingInitialization
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SingleNameBinding : BindingIdentifier Initializeropt
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[...]
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6. If Initializer is present and v is undefined, then
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[...]
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[...]
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---*/
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var initCount = 0;
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function counter() {
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initCount += 1;
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}
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var callCount = 0;
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async function* f({ w = counter(), x = counter(), y = counter(), z = counter() }) {
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assert.sameValue(w, null);
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assert.sameValue(x, 0);
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assert.sameValue(y, false);
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assert.sameValue(z, '');
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assert.sameValue(initCount, 0);
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callCount = callCount + 1;
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};
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f({ w: null, x: 0, y: false, z: '' }).next().then(() => {
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assert.sameValue(callCount, 1, 'invoked exactly once');
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}).then($DONE, $DONE);
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