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47 lines
1.6 KiB
JavaScript
47 lines
1.6 KiB
JavaScript
// This file was procedurally generated from the following sources:
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// - src/dstr-binding/ary-ptrn-rest-id-elision.case
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// - src/dstr-binding/default/async-gen-func-named-expr.template
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/*---
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description: Rest element following elision elements (async generator named function expression)
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esid: sec-asyncgenerator-definitions-evaluation
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features: [async-iteration]
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flags: [generated, async]
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info: |
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AsyncGeneratorExpression : async [no LineTerminator here] function * BindingIdentifier
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( FormalParameters ) { AsyncGeneratorBody }
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[...]
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7. Let closure be ! AsyncGeneratorFunctionCreate(Normal, FormalParameters,
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AsyncGeneratorBody, funcEnv, strict).
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[...]
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13.3.3.6 Runtime Semantics: IteratorBindingInitialization
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ArrayBindingPattern : [ Elisionopt BindingRestElement ]
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1. If Elision is present, then
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a. Let status be the result of performing
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IteratorDestructuringAssignmentEvaluation of Elision with
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iteratorRecord as the argument.
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b. ReturnIfAbrupt(status).
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2. Return the result of performing IteratorBindingInitialization for
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BindingRestElement with iteratorRecord and environment as arguments.
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---*/
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var values = [1, 2, 3, 4, 5];
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var callCount = 0;
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var f;
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f = async function* h([ , , ...x]) {
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assert(Array.isArray(x));
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assert.sameValue(x.length, 3);
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assert.sameValue(x[0], 3);
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assert.sameValue(x[1], 4);
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assert.sameValue(x[2], 5);
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assert.notSameValue(x, values);
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callCount = callCount + 1;
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};
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f(values).next().then(() => {
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assert.sameValue(callCount, 1, 'invoked exactly once');
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}).then($DONE, $DONE);
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