mirror of https://github.com/tc39/test262.git
64 lines
2.1 KiB
JavaScript
64 lines
2.1 KiB
JavaScript
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// This file was procedurally generated from the following sources:
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// - src/dstr-binding/ary-ptrn-rest-ary-elem.case
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// - src/dstr-binding/default/async-gen-func-decl-dflt.template
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/*---
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description: Rest element containing an array BindingElementList pattern (async generator function declaration (default parameter))
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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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13.3.3.6 Runtime Semantics: IteratorBindingInitialization
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BindingRestElement : ... BindingPattern
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1. Let A be ArrayCreate(0).
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[...]
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3. Repeat
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[...]
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b. If iteratorRecord.[[done]] is true, then
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i. Return the result of performing BindingInitialization of
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BindingPattern with A and environment as the arguments.
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[...]
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13.3.3.6 Runtime Semantics: IteratorBindingInitialization
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SingleNameBinding : BindingIdentifier Initializeropt
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[...]
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4. If iteratorRecord.[[done]] is false, then
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a. Let next be IteratorStep(iteratorRecord.[[iterator]]).
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b. If next is an abrupt completion, set iteratorRecord.[[done]] to true.
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c. ReturnIfAbrupt(next).
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d. If next is false, set iteratorRecord.[[done]] to true.
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e. Else,
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[...]
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i. Let v be IteratorValue(next).
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ii. If v is an abrupt completion, set
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iteratorRecord.[[done]] to true.
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iii. ReturnIfAbrupt(v).
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5. If iteratorRecord.[[done]] is true, let v be undefined.
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[...]
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8. Return InitializeReferencedBinding(lhs, v).
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---*/
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var callCount = 0;
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async function* f([...[x, y, z]] = [3, 4, 5]) {
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assert.sameValue(x, 3);
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assert.sameValue(y, 4);
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assert.sameValue(z, 5);
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callCount = callCount + 1;
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};
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f().next().then(() => {
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assert.sameValue(callCount, 1, 'invoked exactly once');
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}).then($DONE, $DONE);
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